阅读说明：本技术 热泵系统及其控制方法、控制装置和空调设备 (Heat pump system, control method and control device thereof and air conditioning equipment ) 是由 王磊 杨智峰 熊俊峰 于 2021-01-05 设计创作，主要内容包括：本发明涉及一种热泵系统及其控制方法、控制装置和空调设备。热泵系统包括：室内机(100),包括第一室内换热器(11)和第二室内换热器(12)；室外机(200),包括压缩机(1)和室外换热器(20)；和阀门组件(30),与压缩机(1)的排气口和吸气口、第一室内换热器(11)、第二室内换热器(12)以及室外换热器(20)连接,阀门组件(30)被配置为控制冷媒的流向和/或连接管路的通断,以实现热泵系统在不同工作模式之间的切换；其中,工作模式包括制冷模式、制热模式和除湿再热模式,在除湿再热模式下,阀门组件(30)被配置为连通压缩机(1)的排气口与第一室内换热器(11)的第一接口,以使第一室内换热器(11)用作冷凝器。(The invention relates to a heat pump system, a control method and a control device thereof and air conditioning equipment. The heat pump system includes: an indoor unit (100) including a first indoor heat exchanger (11) and a second indoor heat exchanger (12); an outdoor unit (200) including a compressor (1) and an outdoor heat exchanger (20); the valve assembly (30) is connected with an air outlet and an air suction port of the compressor (1), the first indoor heat exchanger (11), the second indoor heat exchanger (12) and the outdoor heat exchanger (20), and the valve assembly (30) is configured to control the flow direction of a refrigerant and/or the on-off of a connecting pipeline so as to realize the switching of the heat pump system between different working modes; the working modes comprise a cooling mode, a heating mode and a dehumidification and reheating mode, and in the dehumidification and reheating mode, the valve assembly (30) is configured to communicate the exhaust port of the compressor (1) with the first interface of the first indoor heat exchanger (11) so that the first indoor heat exchanger (11) can be used as a condenser.)

1. A heat pump system, comprising:

an indoor unit (100) including a first indoor heat exchanger (11) and a second indoor heat exchanger (12);

an outdoor unit (200) including a compressor (1) and an outdoor heat exchanger (20); and

a valve assembly (30) connected to the air outlet and the air inlet of the compressor (1), the first indoor heat exchanger (11), the second indoor heat exchanger (12) and the outdoor heat exchanger (20), wherein the valve assembly (30) is configured to control the flow direction of a refrigerant and/or the on/off of a connecting pipeline so as to switch the heat pump system between different working modes;

wherein the working modes comprise a cooling mode, a heating mode and a dehumidification and reheat mode, in the dehumidification and reheat mode, the valve assembly (30) is configured to communicate the exhaust port of the compressor (1) with the first interface of the first indoor heat exchanger (11) so that the first indoor heat exchanger (11) is used as a condenser.

2. The heat pump system of claim 1, wherein the outdoor heat exchanger (20) comprises a first outdoor heat exchanger (21) and a second outdoor heat exchanger (22), the valve assembly (30) further configured to cause at least one of the first outdoor heat exchanger (21) and the second outdoor heat exchanger (22) to function as a condenser in the dehumidification and reheat mode.

3. The heat pump system according to claim 2, wherein the dehumidification-reheat mode includes a first dehumidification-reheat mode in which the first outdoor heat exchanger (21) and the second outdoor heat exchanger (22) each function as a condenser, a second dehumidification-reheat mode, and a third dehumidification-reheat mode; in the second dehumidification and reheat mode, the first outdoor heat exchanger (21) functions as a condenser, and the second outdoor heat exchanger (22) functions as an evaporator; in the third dehumidification and reheat mode, the second outdoor heat exchanger (22) functions as a condenser, and the first outdoor heat exchanger (21) functions as an evaporator; the valve assembly (30) is configured to enable the heat pump system to be switched among the first dehumidification and reheat mode, the second dehumidification and reheat mode, and the third dehumidification and reheat mode.

4. The heat pump system according to claim 1, wherein the outdoor heat exchanger (20) comprises a first outdoor heat exchanger (21) and a second outdoor heat exchanger (22), and the operating mode comprises a defrost mode in which the valve assembly (30) is configured to cause one of the first outdoor heat exchanger (21) and the second outdoor heat exchanger (22) to function as an evaporator and the other of the first outdoor heat exchanger (21) and the second outdoor heat exchanger (22) to function as a condenser.

5. The heat pump system according to claim 4, wherein the defrosting mode includes a first defrosting mode in which the first outdoor heat exchanger (21) functions as an evaporator and the second outdoor heat exchanger (22) functions as a condenser; in the second defrosting mode, the first outdoor heat exchanger (21) functions as a condenser, and the second outdoor heat exchanger (22) functions as an evaporator; the valve assembly (30) is configured to enable the heat pump system to switch between the first and second defrost modes.

6. The heat pump system according to claim 2, wherein the outdoor unit (200) further comprises a first outdoor fan (23) and a second outdoor fan (24), the first outdoor fan (23) and the first outdoor heat exchanger (21) are located in a first duct, the second outdoor fan (24) and the second outdoor heat exchanger (22) are located in a second duct, and the first duct and the second duct are provided independently.

7. The heat pump system according to claim 1, wherein the indoor unit (100) further includes an indoor fan (13), the first indoor heat exchanger (11), and the second indoor heat exchanger (12) are located in the same duct, and indoor return air generated by the indoor fan (13) passes through the second indoor heat exchanger (12) and the first indoor heat exchanger (11) in this order.

8. The heat pump system according to any one of claims 2-7, wherein said valve assembly (30) comprises a first four-way valve (2) and a second four-way valve (3);

a first port (D1) of the first four-way valve (2) is communicated with an exhaust port of the compressor (1), a second port (C1) of the first four-way valve (2) is communicated with a first interface of the second outdoor heat exchanger (22), a third port (S1) of the first four-way valve (2) is communicated with an air suction port of the compressor (1), and a fourth port (E1) of the first four-way valve (2) is communicated with a first interface of the second indoor heat exchanger (12);

a first port (D2) of the second four-way valve (3) is communicated with an exhaust port of the compressor (1), a second port (C2) of the second four-way valve (3) is communicated with a first port of the first outdoor heat exchanger (21), a third port (S2) of the second four-way valve (3) is communicated with an air suction port of the compressor (1), and a fourth port (E2) of the second four-way valve (3) is communicated with a first port of the second indoor heat exchanger (12).

9. The heat pump system of claim 8, wherein the valve assembly (30) further comprises a first control valve (4), a second control valve (5), and a third control valve (6);

the first control valve (4) is arranged on a connecting pipeline between a fourth port (E2) of the first four-way valve (2) and a first interface of the second indoor heat exchanger (12), wherein the first interface of the first control valve (4) is communicated with the first interface of the second indoor heat exchanger (12), and the second interface of the first control valve (4) is communicated with a fourth port (E2) of the first four-way valve (2);

the second control valve (5) is arranged on a connecting pipeline between a fourth port (E3) of the second four-way valve (3) and a first interface of the second indoor heat exchanger (12), wherein the first interface of the second control valve (5) is communicated with the first interface of the second indoor heat exchanger (12), and the second interface of the second control valve (5) is communicated with a fourth port (E3) of the second four-way valve (3);

the third control valve (6) is disposed on a connection line between an exhaust port of the compressor (1) and a first port of the first indoor heat exchanger (11).

10. The heat pump system according to claim 9, wherein said outdoor unit (200) further comprises a first throttling device (9) and a second throttling device (10);

a first interface of the first throttling device (9) is connected with a second interface of the first outdoor heat exchanger (21), and a second interface of the first throttling device (9) is connected with a second interface of the second throttling device (10);

the first interface of the second throttling device (10) is connected with the second interface of the second outdoor heat exchanger (22), and the second interface of the second throttling device (10) is connected with the second interface of the second indoor heat exchanger (12).

11. Heat pump system according to claim 10, wherein said indoor unit (100) further comprises third (14) and fourth (15) throttling means;

a first interface of the third throttling device (14) is connected with a second interface of the first indoor heat exchanger (11), and a second interface of the third throttling device (14) is connected with a second interface of the fourth throttling device (15);

a first interface of the fourth throttling device (15) is connected with a second interface of the second indoor heat exchanger (12), and a second interface of the fourth throttling device (15) is connected with a second interface of the second throttling device (10).

12. The heat pump system according to claim 8, wherein the valve assembly (30) further comprises a first throttling element (7), the first throttling element (7) being connected between the fourth port (E1) of the first four-way valve (2) and the suction of the compressor (1).

13. A heat pump system according to claim 12, wherein said valve assembly (30) further comprises a second throttling element (8), said second throttling element (8) being connected between a fourth port (E2) of said second four-way valve (3) and a suction inlet of said compressor (1).

14. A control method of a heat pump system, applied to control the heat pump system according to any one of claims 1 to 13, comprising:

determining an operating mode of the heat pump system;

controlling the action of a valve assembly (30) in the heat pump system according to a preset control strategy and based on the operating mode.

15. A control method of a heat pump system, applied to control the heat pump system according to any one of claims 9 to 13, comprising:

determining an operating mode of the heat pump system;

and controlling the actions of a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5) and a third control valve (6) in the heat pump system according to a preset control strategy and based on the working mode.

16. The control method according to claim 15, wherein the act of controlling a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5), and a third control valve (6) in the heat pump system comprises:

when the working mode is a first dehumidification and reheat mode, controlling a first port (D1) of the first four-way valve (2) to be communicated with the second port (C1), a third port (S1) to be communicated with the fourth port (E1), a first port (D2) of the second four-way valve (3) to be communicated with the second port (C2), and a third port (S2) to be communicated with the fourth port (E2);

and controlling the first control valve (4), the second control valve (5) and the third control valve (6) to be in a conducting state.

17. The control method according to claim 16, wherein the act of controlling a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5), and a third control valve (6) in the heat pump system comprises:

when the working mode is a second dehumidification and reheat mode, controlling a first port (D1) of the first four-way valve (2) to be communicated with the fourth port (E1), a second port (C1) to be communicated with the third port (S1), a first port (D2) of the second four-way valve (3) to be communicated with the second port (C2), and a third port (S2) to be communicated with the fourth port (E2);

and controlling the first control valve (4) to be in a cut-off state, and controlling the second control valve (5) and the third control valve (6) to be in a conducting state.

18. The control method according to claim 17, wherein the act of controlling a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5), and a third control valve (6) in the heat pump system comprises:

when the working mode is a third dehumidification and reheat mode, controlling a first port (D1) of the first four-way valve (2) to be communicated with the second port (C1), a third port (S1) to be communicated with the fourth port (E1), a first port (D2) of the second four-way valve (3) to be communicated with the fourth port (E2), and a second port (C2) to be communicated with the third port (S2);

and controlling the second control valve (5) to be in a cut-off state, and controlling the first control valve (4) and the third control valve (6) to be in a conducting state.

19. The control method according to claim 15, wherein the act of controlling a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5), and a third control valve (6) in the heat pump system comprises:

when the working mode is a cooling mode, controlling a first port (D1) of the first four-way valve (2) to be communicated with the second port (C1), a third port (S1) to be communicated with the fourth port (E1), a first port (D2) of the second four-way valve (3) to be communicated with the second port (C2), and a third port (S2) to be communicated with the fourth port (E2);

and controlling the third control valve (6) to be in a cut-off state, wherein the first control valve (4) and the second control valve (5) are both in a conducting state.

20. The control method according to claim 15, wherein the act of controlling a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5), and a third control valve (6) in the heat pump system comprises:

when the working mode is a first heating mode, controlling a first port (D1) of the first four-way valve (2) to be communicated with the fourth port (E1), controlling a second port (C1) to be communicated with a third port (S1), controlling a first port (D2) of the second four-way valve (3) to be communicated with the fourth port (E2), and controlling a second port (C2) to be communicated with the third port (S2);

and controlling the first control valve (4), the second control valve (5) and the third control valve (6) to be in a conducting state.

21. The control method according to claim 20, wherein the act of controlling a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5), and a third control valve (6) in the heat pump system comprises:

when the working mode is a second heating mode, controlling a first port (D1) of the first four-way valve (2) to be communicated with the fourth port (E1), controlling a second port (C1) to be communicated with a third port (S1), controlling a first port (D2) of the second four-way valve (3) to be communicated with the fourth port (E2), and controlling a second port (C2) to be communicated with the third port (S2);

and controlling the third control valve (6) to be in a cut-off state, wherein the first control valve (4) and the second control valve (5) are both in a conducting state.

22. The control method according to claim 15, wherein the act of controlling a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5), and a third control valve (6) in the heat pump system comprises:

when the working mode is a first defrosting mode, controlling a first port (D1) of the first four-way valve (2) to be communicated with the second port (C1), a third port (S1) to be communicated with the fourth port (E1), a first port (D2) of the second four-way valve (3) to be communicated with the fourth port (E2), and a second port (C2) to be communicated with the third port (S2);

and controlling the first control valve (4) and the third control valve (6) to be in a stop state, and controlling the second control valve (5) to be in a conducting state.

23. The control method according to claim 22, wherein the act of controlling a first four-way valve (2), a second four-way valve (3), a first control valve (4), a second control valve (5), and a third control valve (6) in the heat pump system comprises:

when the working mode is a second defrosting mode, controlling the first port (D1) of the first four-way valve (2) to be communicated with the fourth port (E1), the second port (C1) to be communicated with the third port (S1), the first port (D2) of the second four-way valve (3) to be communicated with the second port (C2), and the third port (S2) to be communicated with the fourth port (E2);

and controlling the second control valve (5) and the third control valve (6) to be in a stop state, and controlling the first control valve (4) to be in a conducting state.

24. A control device of a heat pump system, comprising:

a memory configured to store instructions;

a processor coupled to the memory, the processor configured to perform implementing the method of any of claims 14-23 based on instructions stored by the memory.

25. An air conditioning apparatus comprising a heat pump system according to any of claims 1-13 and/or a control device of a heat pump system according to claim 24.

26. A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 14-23.

Technical Field

The disclosure relates to the technical field of air conditioning equipment, in particular to a heat pump system, a control method and a control device thereof and the air conditioning equipment.

Background

At present, in order to improve the comfort level of the environment where people are located, a constant temperature and humidity machine is adopted to control the temperature and the humidity in the environment. Most constant temperature and humidity machines need to be provided with an electric heating device, for example, when the indoor humidity is higher than the set humidity and the indoor temperature is lower than or equal to the set temperature, the electric heating device needs to be used for increasing the indoor temperature in order to avoid the indoor temperature being too low; for another example, when the indoor temperature is lower than the set temperature, the indoor temperature needs to be raised, but if the outdoor heat exchanger frosts, a part of high-temperature and high-pressure refrigerant in the heat pump system needs to be used for defrosting, which reduces the heat exchange capability of the heat exchanger in the heat pump system, thereby reducing the heating capability and causing the indoor temperature to fluctuate, and at this time, the electric heating device also needs to be used for adjusting the indoor temperature.

Disclosure of Invention

The inventor finds that the electric heating device can meet the requirement of indoor temperature regulation, but the electric heating device can increase the power consumption and reduce the energy efficiency.

To solve this problem, the present disclosure provides a heat pump system to ensure a heat exchange performance of the heat pump system.

According to a first aspect of embodiments of the present disclosure, there is provided a heat pump system comprising: the indoor unit comprises a first indoor heat exchanger and a second indoor heat exchanger; an outdoor unit including a compressor and an outdoor heat exchanger; the valve assembly is connected with an air outlet and an air suction port of the compressor, the first indoor heat exchanger, the second indoor heat exchanger and the outdoor heat exchanger, and is configured to control the flow direction of a refrigerant and/or the on-off of a connecting pipeline so as to realize the switching of the heat pump system among different working modes; wherein the operation modes include a cooling mode, a heating mode and a dehumidification and reheat mode, and in the dehumidification and reheat mode, the valve assembly is configured to communicate the exhaust port of the compressor with the first port of the first indoor heat exchanger so that the first indoor heat exchanger functions as a condenser.

In some embodiments, the outdoor heat exchanger comprises a first outdoor heat exchanger and a second outdoor heat exchanger, and the valve assembly is further configured to cause at least one of the first outdoor heat exchanger and the second outdoor heat exchanger to function as a condenser in the dehumidification and reheat mode.

In some embodiments, the dehumidification-reheat mode includes a first dehumidification-reheat mode in which the first outdoor heat exchanger and the second outdoor heat exchanger both function as a condenser, a second dehumidification-reheat mode, and a third dehumidification-reheat mode; in the second dehumidification and reheat mode, the first outdoor heat exchanger functions as a condenser and the second outdoor heat exchanger functions as an evaporator; in the third dehumidification and reheat mode, the second outdoor heat exchanger functions as a condenser and the first outdoor heat exchanger functions as an evaporator; the valve assembly is configured to switch the heat pump system among the first dehumidification and reheat mode, the second dehumidification and reheat mode, and the third dehumidification and reheat mode.

In some embodiments, the outdoor heat exchanger includes a first outdoor heat exchanger and a second outdoor heat exchanger, and the operating mode includes a defrost mode in which the valve assembly is configured to cause one of the first outdoor heat exchanger and the second outdoor heat exchanger to function as an evaporator and the other of the first outdoor heat exchanger and the second outdoor heat exchanger to function as a condenser.

In some embodiments, the defrosting mode includes a first defrosting mode in which the first outdoor heat exchanger functions as an evaporator and the second outdoor heat exchanger functions as a condenser; in the second defrosting mode, the first outdoor heat exchanger is used as a condenser, and the second outdoor heat exchanger is used as an evaporator; the valve assembly is configured to enable the heat pump system to switch between the first defrosting mode and the second defrosting mode.

In some embodiments, the outdoor unit further includes a first outdoor fan and a second outdoor fan, the first outdoor fan and the first outdoor heat exchanger are located in a first air duct, the second outdoor fan and the second outdoor heat exchanger are located in a second air duct, and the first air duct and the second air duct are independently disposed.

In some embodiments, the indoor unit further includes an indoor fan, the first indoor heat exchanger and the second indoor heat exchanger are located in the same air duct, and indoor return air generated by the indoor fan sequentially passes through the second indoor heat exchanger and the first indoor heat exchanger.

In some embodiments, the valve assembly comprises a first four-way valve and a second four-way valve; a first port of the first four-way valve is communicated with an exhaust port of the compressor, a second port of the first four-way valve is communicated with a first interface of the second outdoor heat exchanger, a third port of the first four-way valve is communicated with an air suction port of the compressor, and a fourth port of the first four-way valve is communicated with a first interface of the second indoor heat exchanger; the first port of the second four-way valve is communicated with the exhaust port of the compressor, the second port of the second four-way valve is communicated with the first interface of the first outdoor heat exchanger, the third port of the second four-way valve is communicated with the suction port of the compressor, and the fourth port of the second four-way valve is communicated with the first interface of the second indoor heat exchanger.

In some embodiments, the valve assembly further comprises a first control valve, a second control valve, and a third control valve; the first control valve is arranged on a connecting pipeline between a fourth port of the first four-way valve and a first interface of the second indoor heat exchanger, wherein the first interface of the first control valve is communicated with the first interface of the second indoor heat exchanger, and the second interface of the first control valve is communicated with the fourth port of the first four-way valve; the second control valve is arranged on a connecting pipeline between a fourth port of the second four-way valve and a first interface of the second indoor heat exchanger, wherein the first interface of the second control valve is communicated with the first interface of the second indoor heat exchanger, and a second interface of the second control valve is communicated with the fourth port of the second four-way valve; the third control valve is disposed on a connection line between the discharge port of the compressor and the first port of the first indoor heat exchanger.

In some embodiments, the outdoor unit further comprises a first throttling device and a second throttling device; a first interface of the first throttling device is connected with a second interface of the first outdoor heat exchanger, and a second interface of the first throttling device is connected with a second interface of the second throttling device; and a first interface of the second throttling device is connected with a second interface of the second outdoor heat exchanger, and a second interface of the second throttling device is connected with a second interface of the second indoor heat exchanger.

In some embodiments, the indoor unit further comprises a third throttling means and a fourth throttling means; a first interface of the third throttling device is connected with a second interface of the first indoor heat exchanger, and a second interface of the third throttling device is connected with a second interface of the fourth throttling device; and a first interface of the fourth throttling device is connected with a second interface of the second indoor heat exchanger, and a second interface of the fourth throttling device is connected with a second interface of the second throttling device.

In some embodiments, the valve assembly further comprises a first throttling element connected between the fourth port of the first four-way valve and the suction inlet of the compressor.

In some embodiments, the valve assembly further comprises a second throttling element connected between the fourth port of the second four-way valve and the suction inlet of the compressor.

According to a second aspect of the embodiments of the present disclosure, there is provided a control method of a heat pump system, which is applied to control the heat pump system according to any one of the embodiments, including: determining an operating mode of the heat pump system; controlling the action of a valve assembly in the heat pump system according to a preset control strategy and based on the working mode.

According to a third aspect of the embodiments of the present disclosure, there is provided a control method of a heat pump system, which is applied to control the heat pump system according to any one of the embodiments, including: determining an operating mode of the heat pump system; and controlling the actions of a first four-way valve, a second four-way valve, a first control valve, a second control valve and a third control valve in the heat pump system according to a preset control strategy and based on the working mode.

In some embodiments, when the operation mode is a first dehumidification and reheating mode, the first port of the first four-way valve is controlled to be communicated with the second port, the third port of the first four-way valve is controlled to be communicated with the fourth port, the first port of the second four-way valve is controlled to be communicated with the second port, and the third port of the second four-way valve is controlled to be communicated with the fourth port; and controlling the first control valve, the second control valve and the third control valve to be in a conducting state.

In some embodiments, when the operation mode is the second dehumidification and reheating mode, the first port of the first four-way valve is controlled to be communicated with the fourth port, the second port of the first four-way valve is controlled to be communicated with the third port, the first port of the second four-way valve is controlled to be communicated with the second port, and the third port of the second four-way valve is controlled to be communicated with the fourth port; and controlling the first control valve to be in a cut-off state, and controlling the second control valve and the third control valve to be in a conducting state.

In some embodiments, when the operation mode is a third dehumidification and reheating mode, the first port of the first four-way valve is controlled to be communicated with the second port, the third port of the first four-way valve is controlled to be communicated with the fourth port, the first port of the second four-way valve is controlled to be communicated with the fourth port, and the second port of the second four-way valve is controlled to be communicated with the third port; and controlling the second control valve to be in a cut-off state, wherein the first control valve and the third control valve are in a conducting state.

In some embodiments, when the operation mode is a cooling mode, the first port of the first four-way valve is controlled to be communicated with the second port, the third port of the first four-way valve is controlled to be communicated with the fourth port, the first port of the second four-way valve is controlled to be communicated with the second port, and the third port of the second four-way valve is controlled to be communicated with the fourth port; and controlling the third control valve to be in a cut-off state, wherein the first control valve and the second control valve are in a conducting state.

In some embodiments, when the operation mode is a first heating mode, the first port of the first four-way valve is controlled to be communicated with the fourth port, the second port of the first four-way valve is controlled to be communicated with the third port, the first port of the second four-way valve is controlled to be communicated with the fourth port, and the second port of the second four-way valve is controlled to be communicated with the third port; and controlling the first control valve, the second control valve and the third control valve to be in a conducting state.

In some embodiments, when the operation mode is a second heating mode, the first port of the first four-way valve is controlled to be communicated with the fourth port, the second port of the first four-way valve is controlled to be communicated with a third port, the first port of the second four-way valve is controlled to be communicated with the fourth port, and the second port of the second four-way valve is controlled to be communicated with the third port; and controlling the third control valve to be in a cut-off state, wherein the first control valve and the second control valve are in a conducting state.

In some embodiments, when the operation mode is a first defrosting mode, the first port of the first four-way valve is controlled to be communicated with the second port, the third port of the first four-way valve is controlled to be communicated with the fourth port, the first port of the second four-way valve is controlled to be communicated with the fourth port, and the second port of the second four-way valve is controlled to be communicated with the third port; and controlling the first control valve and the third control valve to be in a stop state, and controlling the second control valve to be in a conducting state.

In some embodiments, when the operation mode is a second defrosting mode, the first port of the first four-way valve is controlled to be communicated with the fourth port, the second port of the first four-way valve is controlled to be communicated with the third port, the first port of the second four-way valve is controlled to be communicated with the second port, and the third port of the second four-way valve is controlled to be communicated with the fourth port; and controlling the second control valve and the third control valve to be in a cut-off state, and controlling the first control valve to be in a conducting state.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a control apparatus of a heat pump system, including: a memory configured to store instructions; a processor coupled to the memory, the processor configured to perform a method implementing any of the embodiments described above based on instructions stored by the memory.

According to a fifth aspect of the embodiments of the present disclosure, there is provided an air conditioning apparatus including the heat pump system according to any one of the embodiments and/or the control device of the heat pump system according to any one of the embodiments.

According to a sixth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the instructions, when executed by a processor, implement the method according to any one of the embodiments.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic diagram of a heat pump system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an embodiment of the heat pump system of the present invention in a cooling mode;

FIG. 3 is a schematic diagram of a first dehumidification and reheat mode of an embodiment of a heat pump system according to the present invention;

FIG. 4 is a schematic diagram of an embodiment of a heat pump system of the present invention in a second dehumidification and reheat mode;

FIG. 5 is a schematic diagram of an embodiment of a heat pump system of the present invention in a third dehumidification and reheat mode;

FIG. 6 is a schematic view of an embodiment of the heat pump system of the present invention in a first heating mode;

FIG. 7 is a schematic view of an embodiment of the heat pump system of the present invention in a second heating mode;

FIG. 8 is a schematic view of an embodiment of the heat pump system of the present invention in a first defrost mode;

fig. 9 is a schematic structural diagram of an embodiment of the heat pump system in the second defrosting mode.

In the figure:

100. an indoor unit; 200. an outdoor unit;

1. a compressor; 2. a first four-way valve; 3. a second four-way valve; 4. a first control valve; 5. a second control valve; 6. a third control valve; 7. a first throttling element; 8. a second throttling element; 9. a first throttling device; 10. a second throttling device; 11. a first indoor heat exchanger; 12. a second indoor heat exchanger; 13. an indoor fan; 14. a third throttling means; 15. a fourth throttling device; 16. a first shut-off valve; 17. a second stop valve; 18. a third stop valve; 19. a liquid storage tank; 20. an outdoor heat exchanger; 21. a first outdoor heat exchanger; 22. a second outdoor heat exchanger; 23. a first outdoor fan; 24. a second outdoor fan; 30. a valve assembly.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 is a schematic structural diagram of an embodiment of a heat pump system of the present invention.

As shown in fig. 1, the heat pump system includes an indoor unit 100 and an outdoor unit 200. The indoor unit 100 includes a first indoor heat exchanger 11 and a second indoor heat exchanger 12, and the outdoor unit 200 includes a compressor 1, an outdoor heat exchanger 20, and a valve assembly 30. The valve assembly 30 is connected to the discharge port and the suction port of the compressor 1, the first indoor heat exchanger 11, the second indoor heat exchanger 12, and the outdoor heat exchanger 20. The valve assembly 30 is configured to control the flow direction of the refrigerant and/or the on/off of the connection pipeline, so as to switch the heat pump system between different working modes. The operation modes of the heat pump system include a cooling mode, a heating mode, and a dehumidification-reheat mode in which the valve assembly 30 is configured to communicate the discharge port of the compressor 1 with the first port of the first indoor heat exchanger 11 so that the first indoor heat exchanger 11 functions as a condenser.

In the heat pump system provided by the above embodiment of the present disclosure, the valve assembly 30 controls the flow direction of the refrigerant and/or the on/off of the connection pipeline, so that the heat pump system can be switched between the cooling mode, the heating mode and the dehumidifying and reheating mode, and different requirements of users in different seasons are met. In the dehumidification and heating mode, the exhaust port of the compressor 1 can be communicated with the first port of the first indoor heat exchanger 11 through the valve assembly 30, that is, the first indoor heat exchanger 11 is used as a condenser, so that the indoor environment is heated through the first indoor heat exchanger 11, and the excessive reduction of the indoor temperature caused by dehumidification is avoided, thereby improving the heat exchange performance of the heat pump system. In addition, the use of electric heating devices can be reduced, the power consumption is reduced, and the energy efficiency is improved.

In the above embodiment, when the first indoor heat exchanger 11 is used as a condenser, the first port of the first indoor heat exchanger 11 is directly communicated with the exhaust port of the compressor 1, so that a part of the exhaust gas of the compressor 1 can be directly introduced into the room to reheat the indoor environment, and the reheating efficiency is high.

In some embodiments, the outdoor heat exchanger 20 includes a first outdoor heat exchanger 21 and a second outdoor heat exchanger 22, and the valve assembly 30 is further configured to cause at least one of the first outdoor heat exchanger 21 and the second outdoor heat exchanger 22 to function as a condenser in the dehumidification and reheat mode.

In the above embodiments, by controlling the valve assembly 30, in the dehumidification and reheat mode, the two heat exchangers disposed outdoors can be simultaneously operated and used as condensers, and at this time, the operating frequency of the compressor 1 is high, and the lubricating oil in the compressor 1 can smoothly flow along with the refrigerant. One of the two heat exchangers disposed outdoors may also be used as a condenser and the other as an evaporator. In the embodiment in which one of the two heat exchangers disposed outdoors functions as a condenser and the other functions as an evaporator, since the first indoor heat exchanger 11 disposed indoors functions as a condenser and the second indoor heat exchanger 12 functions as an evaporator in the dehumidification reheating mode, the indoor and outdoor heat exchangers can achieve better flow division as a whole, and after increasing the reheating capacity of the first indoor heat exchanger 11 to increase the frequency of the compressor 1, the indoor environment can be adjusted to an appropriate temperature and humidity by dynamic flow division between the second indoor heat exchanger 12 and the outdoor heat exchanger functioning as an evaporator.

In some embodiments, the dehumidification-reheat mode includes a first dehumidification-reheat mode in which the first and second outdoor heat exchangers 21 and 22 each function as a condenser, a second dehumidification-reheat mode, and a third dehumidification-reheat mode. In the second dehumidification and reheating mode, the first outdoor heat exchanger 21 functions as a condenser, and the second outdoor heat exchanger 22 functions as an evaporator. In the third dehumidification and reheating mode, the second outdoor heat exchanger 22 functions as a condenser, and the first outdoor heat exchanger 21 functions as an evaporator. The valve assembly 30 is configured to switch the heat pump system between a first dehumidification and reheat mode, a second dehumidification and reheat mode, and a third dehumidification and reheat mode.

As shown in fig. 3, in the first dehumidification and reheating mode, the first outdoor heat exchanger 21, the second outdoor heat exchanger 22 and the first indoor heat exchanger 11 are all used as condensers, the second indoor heat exchanger 12 is used as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 12, and the indoor environment can be reheated by the first indoor heat exchanger 11, so that the temperature of the indoor environment is prevented from being too low to meet the dehumidification requirement.

As shown in fig. 4, in the second dehumidification and reheating mode, the second outdoor heat exchanger 22 is used as an evaporator, the first outdoor heat exchanger 21 and the first indoor heat exchanger 11 are both used as condensers, the second indoor heat exchanger 12 is used as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 12, and the indoor environment can be reheated by the first indoor heat exchanger 11, so that the temperature of the indoor environment is prevented from being too low to meet the dehumidification requirement. The refrigerant in the second indoor heat exchanger 12 is branched to the second outdoor heat exchanger 22 to avoid excessive dehumidification of the indoor environment caused by the increase of the frequency of the compressor 1.

As shown in fig. 5, in the third dehumidification and reheating mode, the first outdoor heat exchanger 21 serves as an evaporator, the second outdoor heat exchanger 22 and the first indoor heat exchanger 11 both serve as condensers, the second indoor heat exchanger 12 serves as an evaporator, the indoor environment is cooled and dehumidified by the second indoor heat exchanger 12, and the indoor environment can be reheated by the first indoor heat exchanger 11, thereby preventing the temperature of the indoor environment from being too low to meet dehumidification requirements. The refrigerant in the second indoor heat exchanger 12 can be diverted to the first outdoor heat exchanger 21 to avoid excessive dehumidification of the indoor environment due to the increase of the frequency of the compressor 1.

In some embodiments, the outdoor heat exchanger 20 includes a first outdoor heat exchanger 21 and a second outdoor heat exchanger 22, and the operation mode includes a defrosting mode in which the valve assembly 30 is configured such that one of the first outdoor heat exchanger 21 and the second outdoor heat exchanger 22 functions as a condenser and the other of the first outdoor heat exchanger 21 and the second outdoor heat exchanger 22 functions as an evaporator.

When the indoor and outdoor environment temperature is low and a heat pump system is needed for heating, the outdoor heat exchanger can rapidly convey absorbed heat to the indoor environment, so that the frosting phenomenon easily occurs on the outer surface of the outdoor heat exchanger. In some of the above embodiments, one of the first and second outdoor heat exchangers 21 and 22 may be operated as a condenser by controlling the valve assembly 30 to heat-exchange and melt frost condensed on an outer surface of the other of the first and second outdoor heat exchangers 21 and 22 by heat released from the condenser.

In some embodiments, by controlling the valve assembly 30, the switching between the cooling mode, the heating mode, the dehumidification reheating mode and the defrosting mode can be realized, so that the heat pump system can adapt to more working conditions and meet more requirements.

In some embodiments, the defrosting mode includes a first defrosting mode in which the first outdoor heat exchanger 21 functions as an evaporator and the second outdoor heat exchanger 22 functions as a condenser, and a second defrosting mode. In the second defrosting mode, the first outdoor heat exchanger 21 functions as a condenser, and the second outdoor heat exchanger 22 functions as an evaporator. The valve assembly 30 is configured to enable the heat pump system to be switched between a first defrost mode and a second defrost mode.

By alternately carrying out the two defrosting modes, the defrosting operation can be respectively carried out on the two outdoor heat exchangers. The heat pump system uses the double-chamber outer side heat exchanger, adopts the first defrosting mode and the second defrosting mode to realize asynchronous defrosting, and the indoor side heat exchanger still keeps a high-pressure state during defrosting, keeps the heat output of the indoor side, and reduces the fluctuation of the indoor temperature caused by the fact that the indoor side heat exchanger does not heat during defrosting of the common heat pump air conditioner.

In some embodiments, the outdoor unit 200 further includes a first outdoor fan 23 and a second outdoor fan 24, the first outdoor fan 23 and the first outdoor heat exchanger 21 are located in the first air duct, the second outdoor fan 24 and the second outdoor heat exchanger 22 are located in the second air duct, and the first air duct and the second air duct are independently disposed.

In some embodiments, the indoor unit 100 further includes an indoor fan 13, the first indoor heat exchanger 11, and the second indoor heat exchanger 12 are located in the same duct, and indoor return air generated by the indoor fan 13 passes through the second indoor heat exchanger 12 and the first indoor heat exchanger 11 in sequence.

The second indoor heat exchanger 12 is disposed upstream of the first indoor heat exchanger 11, so that the indoor return air can pass through the second indoor heat exchanger 12 and then the first indoor heat exchanger 11 under the action of the indoor fan 10. This has the advantage that when the heat pump system is in the dehumidification and reheat mode, the first indoor heat exchanger 11 functions as a condenser and the second indoor heat exchanger 12 functions as an evaporator, thereby preventing heat released from the condenser from being directly absorbed by the evaporator, which is beneficial to improving the energy efficiency of the indoor heat exchanger.

In some embodiments, as shown in fig. 2-9, the valve assembly 30 includes a first four-way valve 2 and a second four-way valve 3.

The first port D1 of the first four-way valve 2 is communicated with the exhaust port of the compressor 1, the second port C1 of the first four-way valve 2 is communicated with the first port of the second outdoor heat exchanger 22, the third port S1 of the first four-way valve 2 is communicated with the suction port of the compressor 1, and the fourth port E1 of the first four-way valve 2 is communicated with the first port of the second indoor heat exchanger 12.

A first port D2 of the second four-way valve 3 is communicated with an exhaust port of the compressor 1, a second port C2 of the second four-way valve 3 is communicated with a first port of the first outdoor heat exchanger 21, a third port S2 of the second four-way valve 3 is communicated with a suction port of the compressor 1, and a fourth port E2 of the second four-way valve 3 is communicated with a first port of the second indoor heat exchanger 12.

When the first four-way valve 2 is energized, the first port D1 and the fourth port E1 communicate with each other, and the second port C1 and the third port S1 communicate with each other. When the first four-way valve 2 is powered off, the first port D1 is communicated with the second port C1, and the third port S1 is communicated with the fourth port E1. The second four-way valve 3 has the same attributes.

In some embodiments, as shown in fig. 2-9, the valve assembly 30 further includes a first control valve 4, a second control valve 5, and a third control valve 6.

The first control valve 4 is provided on a connection line between the fourth port E2 of the first four-way valve 2 and the first port of the second indoor heat exchanger 12. A first port of the first control valve 4 is communicated with a first port of the second indoor heat exchanger 12, and a second port of the first control valve 4 is communicated with a fourth port E2 of the first four-way valve 2.

The second control valve 5 is provided on a connection line between the fourth port E3 of the second four-way valve 3 and the first port of the second indoor heat exchanger 12. A first port of the second control valve 5 communicates with a first port of the second indoor heat exchanger 12, and a second port of the second control valve 5 communicates with the fourth port E3 of the second four-way valve 3.

The third control valve 6 is provided on a connection line between the discharge port of the compressor 1 and the first port of the first indoor heat exchanger 11.

In some embodiments, as shown in fig. 2 to 9, the outdoor unit 200 further includes a first throttling device 9 and a second throttling device 10.

A first port of the first throttling device 9 is connected with a second port of the first outdoor heat exchanger 21, and a second port of the first throttling device 9 is connected with a second port of the second throttling device 10. A first port of the second throttling device 10 is connected to a second port of the second outdoor heat exchanger 22, and a second port of the second throttling device 10 is connected to a second port of the second indoor heat exchanger 12.

In some embodiments, as shown in fig. 2 to 9, the indoor unit 100 further includes a third throttling device 14 and a fourth throttling device 15.

A first port of the third throttling device 14 is connected to a second port of the first indoor heat exchanger 11, and a second port of the third throttling device 14 is connected to a second port of the fourth throttling device 15. A first port of the fourth throttling device 15 is connected to a second port of the second indoor heat exchanger 12, and a second port of the fourth throttling device 15 is connected to a second port of the second throttling device 10.

In some embodiments, as shown in fig. 2-9, the valve assembly 30 further comprises a first throttling element 7. The first throttling element 7 is connected between the fourth port E1 of the first four-way valve 2 and the suction port of the compressor 1.

By providing the first throttling element 7 between the fourth port E1 of the first four-way valve 2 and the suction port of the compressor 1, the liquid refrigerant in the pipe between the fourth port E1 of the first four-way valve 2 and the first control valve 4 can be drained in time after the first four-way valve 2 is reversed, avoiding the liquid impact problem.

In some embodiments, as shown in fig. 2-9, the valve assembly 30 further includes a second throttling element 8. The second throttling element 8 is connected between the fourth port E2 of the second four-way valve 3 and the suction port of the compressor 1.

By providing the second throttling element 8 between the fourth port E2 of the second four-way valve 3 and the suction port of the compressor 1, the liquid refrigerant in the pipeline between the fourth port E2 of the second four-way valve 3 and the second control valve 5 can be drained in time after the second four-way valve 3 is reversed, and the liquid impact problem is avoided.

In some embodiments, the first throttling element 7 and the second throttling element 8 are capillary tubes.

The operation of the heat pump system of the present disclosure is explained below based on fig. 1 to 9:

as shown in fig. 1 to 9, the heat pump system includes an indoor unit 100 and an outdoor unit 200. The indoor unit 100 includes a first indoor heat exchanger 11, a second indoor heat exchanger 12, an indoor fan 13, a third throttling device 14, and a fourth throttling device 15. The outdoor unit 200 includes a compressor 1, a first throttling device 9, a second throttling device 10, an outdoor heat exchanger 20 (including a first outdoor heat exchanger 21 and a second outdoor heat exchanger 22), a first outdoor fan 23, and a second outdoor fan 24. The valve assembly 30 is disposed in the chamber.

The valve assembly 30 comprises a first four-way valve 2, a second four-way valve 3, a first control valve 4, a second control valve 5, a third control valve 6, a first throttling element 7 and a second throttling element 8.

The heat pump system further comprises a first stop valve 16, a second stop valve 17, a third stop valve 18 and a reservoir tank 19.

The first port D1 of the first four-way valve 2 is communicated with the discharge port of the compressor 1, the second port C1 of the first four-way valve 2 is communicated with the first port of the second outdoor heat exchanger 22, the third port S1 of the first four-way valve 2 is communicated with the suction port of the compressor 1, and the fourth port E1 of the first four-way valve 2 is communicated with the second port of the first control valve 4.

A first port D2 of the second four-way valve 3 communicates with the discharge port of the compressor 1, a second port C2 of the second four-way valve 3 communicates with the first port of the first outdoor heat exchanger 21, a third port S2 of the second four-way valve 3 communicates with the suction port of the compressor 1, and a fourth port E2 of the second four-way valve 3 communicates with the second port of the second control valve 5.

The first outdoor fan 23 and the first outdoor heat exchanger 21 are located in the first air duct, the second outdoor fan 24 and the second outdoor heat exchanger 21 are located in the second air duct, and the first air duct and the second air duct are independently arranged.

The first end of the first throttling gear 9 is communicated with the second interface of the first outdoor heat exchanger 19, and the second end of the first throttling gear 9 is communicated with the liquid storage tank 19. A first end of the second throttling device 10 is communicated with a second port of the second outdoor heat exchanger 20, and a second end of the second throttling device 10 is communicated with the liquid storage tank 19.

The liquid storage tank 19 is disposed outdoors, a first stop valve 16 is disposed between the liquid storage tank 19 and a first port of the outdoor unit 200, the first port of the indoor unit 100 is communicated with the first port of the outdoor unit 200, and the first port of the indoor unit 100 is communicated with another first stop valve 16.

A first end of the third throttling means 14 communicates with a first cut-off valve 16 located in the indoor unit 100, and a second end of the third throttling means 14 communicates with a second port of the first indoor heat exchanger 11. A first end of the fourth throttling means 15 communicates with a first cut-off valve 16 located in the indoor unit 100, and a second end of the fourth throttling means 15 communicates with a second port of the second indoor heat exchanger 12.

The indoor fan 13, the first indoor heat exchanger 11 and the second indoor heat exchanger 12 are located in the same air duct, and indoor return air generated by the indoor fan 13 sequentially passes through the second indoor heat exchanger 12 and the first indoor heat exchanger 11.

A second stop valve 17 is arranged between the first indoor heat exchanger 11 and the second interface of the indoor unit 100, the second interface of the indoor unit 100 is communicated with the second interface of the outdoor unit 200, and the second interface of the outdoor unit 200 is provided with another second stop valve 17.

A third stop valve 18 is disposed between the second indoor heat exchanger 12 and the third port of the indoor unit 100, the third port of the indoor unit 100 is communicated with the third port of the outdoor unit 200, and another third stop valve 24 is disposed at the third port of the outdoor unit 200.

In this embodiment, the heat pump system has two cooling modes, three dehumidification and reheat modes, two heating modes and two defrosting modes, and the specific control mode is shown in the following tables 1 and 2.

TABLE 1

TABLE 2

The respective operation modes will be specifically described below with reference to the drawings.

As shown in fig. 2, in the cooling mode, the first four-way valve 2 and the second four-way valve 3 are powered off, the first control valve 4 and the second control valve 5 are powered on, and the third control valve 6 is powered off. The indoor fan 13, the first outdoor fan 23 and the second outdoor fan 24 are all in an operating state, the first throttling device 9, the second throttling device 10 and the fourth throttling device 15 are all in an open state, and the third throttling device 14 is in a closed state. The first outdoor heat exchanger 19 and the second outdoor heat exchanger 20 each function as a condenser, and the second indoor heat exchanger 12 functions as an evaporator. The first indoor heat exchanger 11 does not operate.

One path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 19 through the first four-way valve 2, the second outdoor heat exchanger 22 and the second throttling device 10, and the other path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 19 through the second four-way valve 3, the first outdoor heat exchanger 21 and the first throttling device 9. The refrigerant in the liquid storage tank 19 flows out of the liquid storage tank 19, reaches the indoor unit 100 through the first stop valve 16, and is divided into two branches after passing through the fourth throttling device 15 and the second indoor heat exchanger 12, wherein one branch returns to the compressor 1 through the first four-way valve 2, and the other branch returns to the compressor 1 through the second four-way valve 3.

As shown in fig. 3, in the first dehumidification and reheating mode, the first four-way valve 2 and the second four-way valve 3 are all powered off, the first control valve 4, the second control valve 5 and the third control valve 6 are all powered on and conducted, the indoor fan 13, the first outdoor fan 23 and the second outdoor fan 24 are all in an operating state, the first throttling device 9, the second throttling device 10, the third throttling device 14 and the fourth throttling device 15 are all in an open state, the first outdoor heat exchanger 21, the second outdoor heat exchanger 22 and the first indoor heat exchanger 11 are all used as condensers, and the second indoor heat exchanger 12 is used as an evaporator.

One path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 19 through the first four-way valve 2, the second outdoor heat exchanger 22 and the second throttling device 10, and the other path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 19 through the second four-way valve 3, the first outdoor heat exchanger 21 and the first throttling device 9. The refrigerant in the receiver 19 flows out of the receiver 19 and reaches the indoor unit 100 through the first stop valve 16. One path of refrigerant discharged from the exhaust port of the compressor 1 passes through the third control valve 6, the first indoor heat exchanger 11 and the third throttling device 14, then joins with the refrigerant entering the indoor unit 100 through the first stop valve 16, passes through the fourth throttling device 15 and the second indoor heat exchanger 12, and then is divided into two branches, one branch returns to the compressor 1 through the first four-way valve 2, and the other branch returns to the compressor 1 through the second four-way valve 3.

In the indoor unit 100, the second indoor heat exchanger 12 is an evaporator, and can cool and dehumidify an indoor environment; first indoor heat exchanger 11 is the condenser, can be to indoor release heat, avoids the indoor environment to make the temperature too low because of satisfying the humidity requirement.

As shown in fig. 4, in the second dehumidification and reheating mode, the first four-way valve 2 is powered on, the second four-way valve 3 is powered off, the first control valve 4 is powered off and is closed, the second control valve 5 and the third control valve 6 are powered on and are switched on, the indoor fan 13 and the first outdoor fan 23 are both in an operating state, the second outdoor fan 24 is in a stop or operating state, the first throttling device 9, the third throttling device 14 and the fourth throttling device 15 are all in an open state, the second throttling device 10 is in an open state, the first outdoor heat exchanger 21 and the first indoor heat exchanger 11 are both used as a condenser, the second indoor heat exchanger 12 is used as an evaporator, and the second outdoor heat exchanger 22 is used as an evaporator. When the second outdoor heat exchanger 22 is used as an evaporator, the second outdoor heat exchanger 22 can shunt the flow of the low-pressure side in the heat pump system, so that the heat exchange amount of the second indoor heat exchanger 12 is kept unchanged, and the indoor humidity control stability is kept.

When the second outdoor fan 22 is in an operating state and the second throttling device 10 is in an open state, one path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 19 through the second four-way valve 3, the first outdoor heat exchanger 21 and the first throttling device 9. After the refrigerant in the liquid storage tank 19 flows out of the liquid storage tank 19, one path of the refrigerant reaches the indoor unit 100 through the first stop valve 16, and the other path of the refrigerant returns to the compressor 1 through the second throttling device 10, the second outdoor heat exchanger 12 and the first four-way valve 2. One path of the refrigerant discharged from the exhaust port of the compressor 1 passes through the third control valve 6, the first indoor heat exchanger 11 and the third throttling device 14, then joins the refrigerant entering the indoor unit 100 through the first stop valve 16, and then returns to the compressor 1 through the fourth throttling device 15, the second indoor heat exchanger 12, the second control valve 5 and the second four-way valve 3. In this case, the second outdoor heat exchanger 22 is used as an evaporator.

As shown in fig. 5, in the third dehumidification and reheating mode, the first four-way valve 2 is powered off, the second four-way valve 3 is powered on, the first control valve 4 and the third control valve 6 are powered on, the second control valve 5 is powered off, the indoor fan 13 and the second outdoor fan 24 are both in an operating state, the first outdoor fan 23 is in an operating state, the second throttling device 10, the third throttling device 14 and the fourth throttling device 15 are all in an open state, the first throttling device 9 is in an open state, the second outdoor heat exchanger 22 and the first indoor heat exchanger 11 are both used as condensers, the second indoor heat exchanger 12 is used as an evaporator, and the first outdoor heat exchanger 21 is used as an evaporator. When the first outdoor heat exchanger 21 is used as an evaporator, the first outdoor heat exchanger 21 can shunt the flow of the low-pressure side in the heat pump system, so that the heat exchange amount of the second indoor heat exchanger 12 is kept unchanged, and the stability of indoor humidity control is kept.

When the first outdoor fan 23 is in an operating state and the first throttling device 9 is in an open state, one path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 19 through the first four-way valve 2, the second outdoor heat exchanger 22 and the second throttling device 10. After the refrigerant in the liquid storage tank 19 flows out of the liquid storage tank 19, one path of the refrigerant reaches the indoor unit 100 through the first stop valve 16, and the other path of the refrigerant returns to the compressor 1 through the first throttling device 9, the first outdoor heat exchanger 21 and the second four-way valve 3. One path of the refrigerant discharged from the exhaust port of the compressor 1 passes through the third control valve 6, the first indoor heat exchanger 11 and the third throttling device 14, then joins the refrigerant entering the indoor unit 100 through the first stop valve 16, and then returns to the compressor 1 through the fourth throttling device 15, the second indoor heat exchanger 12 and the first four-way valve 2. In this case, the first outdoor heat exchanger 19 is used as an evaporator.

In three dehumidification reheating modes, dehumidification and reheating functions are realized through the mutual cooperation of the first indoor heat exchanger 11 and the second indoor heat exchanger 12, the second indoor heat exchanger 12 is responsible for dehumidification and cooling, because the indoor humidity load is unequal to the cold load, the output of the heat pump system takes the larger of the humidity load and the cold load as the adjusting basis, when the humidity load is larger than the cold load, the indoor temperature can be overshot (the current indoor environment temperature is lower than the set temperature), at the moment, the first indoor heat exchanger 11 intervenes to adjust the cold load, namely, the overlarge refrigerating capacity is compensated and output, and the indoor temperature is matched with the set value.

As shown in fig. 6, in the first heating mode, the first four-way valve 2 and the second four-way valve 3 are all powered on, the first control valve 4, the second control valve 5 and the third control valve 6 are all powered on and conducted, the indoor fan 13, the first outdoor fan 23 and the second outdoor fan 24 are all in an operating state, the first throttling device 9, the second throttling device 10, the third throttling device 14 and the fourth throttling device 15 are all in an open state, the first outdoor heat exchanger 21 and the second outdoor heat exchanger 22 are all used as evaporators, and the first indoor heat exchanger 11 and the second indoor heat exchanger 12 are all used as condensers.

One path of the refrigerant discharged from the discharge port of the compressor 1 passes through the first four-way valve 2, the second indoor heat exchanger 12, and the fourth throttling device 15 to reach the first stop valve 16. The other path of the refrigerant discharged from the discharge port of the compressor 1 reaches the first stop valve 16 through the second four-way valve 3, the second indoor heat exchanger 12, and the fourth throttle device 15. The refrigerant discharged from the discharge port of the compressor 1 passes through the third control valve 6, the first indoor heat exchanger 11, and the third throttling device 14 to reach the first stop valve 16. The refrigerant is merged at the first stop valve 16 and then introduced into the receiver 19 of the outdoor unit 200 through the fourth throttling means 15. The refrigerant from the liquid storage tank 19 is divided into two paths, one path returns to the compressor 1 through the first throttling device 9, the first outdoor heat exchanger 21 and the second four-way valve 3, and the other path returns to the compressor 1 through the second throttling device 10, the second outdoor heat exchanger 22 and the first four-way valve 2.

As shown in fig. 7, in the second heating mode, the first four-way valve 2 and the second four-way valve 3 are all powered on, the first control valve 4 and the second control valve 5 are all powered on, the third control valve 6 is powered off, the indoor fan 13, the first outdoor fan 23 and the second outdoor fan 24 are all in an operating state, the first throttling device 9, the second throttling device 10 and the fourth throttling device 15 are all in an open state, the third throttling device 14 is in a closed state, the first outdoor heat exchanger 21 and the second outdoor heat exchanger 22 are all used as evaporators, the first indoor heat exchanger 11 does not participate in the operation, and the second indoor heat exchanger 12 is used as a condenser.

One path of the refrigerant discharged from the discharge port of the compressor 1 reaches the second indoor heat exchanger 12 through the first four-way valve 2. The other path of the refrigerant discharged from the discharge port of the compressor 1 also reaches the second indoor heat exchanger 12 through the second four-way valve 3, and the refrigerant is merged in the second indoor heat exchanger 12 and then enters the accumulator 19 of the outdoor unit 200 through the fourth throttling device 15. The refrigerant from the liquid storage tank 19 is divided into two paths, one path returns to the compressor 1 through the first throttling device 9, the first outdoor heat exchanger 21 and the second four-way valve 3, and the other path returns to the compressor 1 through the second throttling device 10, the second outdoor heat exchanger 22 and the first four-way valve 2.

The second heating mode has a smaller heating capacity per unit time than the first heating mode. Therefore, when the indoor temperature does not reach the required temperature, the third throttling device 14 and the fourth throttling device 15 can be simultaneously opened, and heating can be simultaneously carried out through the first indoor heat exchanger 11 and the second indoor heat exchanger 12; the third throttling means 14 may be turned off when the indoor temperature exceeds the demand temperature, and heating is performed only by the second indoor heat exchanger 12.

As shown in fig. 8, in the first defrosting mode, the first four-way valve 2 is powered off, the second four-way valve 3 is powered off, the first control valve 4 is powered on and switched on, the second control valve 5 and the third control valve 6 are powered off and switched off, the indoor fan 13 and the first outdoor fan 23 are both in an operating state, the second outdoor fan 24 is stopped, the first throttling device 9, the second throttling device 10 and the fourth throttling device 15 are all in an open state, the third throttling device 14 is in a closed state, the second outdoor heat exchanger 22 and the second indoor heat exchanger 12 are both used as condensers, the first indoor heat exchanger 11 does not participate in the operation, and the first outdoor heat exchanger 21 is used as an evaporator.

One path of the refrigerant discharged from the exhaust port of the compressor 1 passes through the first four-way valve 2, the second indoor heat exchanger 22 and the second throttling device 10 to enter the liquid storage tank 19. The other path of the refrigerant discharged from the exhaust port of the compressor 1 passes through the second four-way valve 3, the second indoor heat exchanger 12 and the fourth throttling device 15 and then enters the liquid storage tank 19. The refrigerant in the liquid storage tank 19 is returned to the compressor 1 through the first throttling device 9, the first outdoor heat exchanger 21 and the second four-way valve 3.

As shown in fig. 9, in the second defrosting mode, the first four-way valve 2 is powered on, the second four-way valve 3 is powered off, the first control valve 4 is powered on and conducted, the second control valve 5 and the third control valve 6 are powered off, the indoor fan 13 and the second outdoor fan 24 are both in an operating state, the first outdoor fan 23 is in a stopped state, the first throttling device 9, the second throttling device 10 and the fourth throttling device 15 are all in an open state, the third throttling device 14 is in a closed state, the first outdoor heat exchanger 21 and the second indoor heat exchanger 12 are both used as condensers, the first indoor heat exchanger 11 does not participate in the operation, and the second outdoor heat exchanger 22 is used as an evaporator.

One path of the refrigerant discharged from the exhaust port of the compressor 1 passes through the first four-way valve 2, the second indoor heat exchanger 12 and the fourth control valve 15 and then enters the liquid storage tank 19. The other path of the refrigerant discharged from the exhaust port of the compressor 1 enters the liquid storage tank 19 after passing through the second four-way valve 3, the first outdoor heat exchanger 21 and the first throttling device 9. The refrigerant in the liquid storage tank 19 is returned to the compressor 1 through the second throttling device 10, the second outdoor heat exchanger 22 and the first four-way valve 2.

In the outdoor unit 200, the first outdoor heat exchanger 19 and the second outdoor heat exchanger 20 alternately serve as an evaporator and a condenser, and heat emitted from the condenser can be used to melt frost formed by heat absorption of the evaporator, thereby achieving asynchronous defrosting.

Based on the heat pump system, the invention also provides a control method of the heat pump system, and the control method is applied to control the heat pump system. Wherein the operation mode of the heat pump system is determined, and the action of the valve assembly 30 in the heat pump system is controlled according to a preset control strategy and based on the operation mode.

Based on the heat pump system, the invention also provides a control method of the heat pump system, and the control method is applied to control the heat pump system. The operation mode of the heat pump system is determined, and the actions of the first four-way valve 2, the second four-way valve 3, the first control valve 4, the second control valve 5 and the third control valve 6 in the heat pump system are controlled according to a preset control strategy and based on the operation mode.

In some embodiments, when the operation mode is the first dehumidification and reheat mode, the first port D1 of the first four-way valve 2 is controlled to be communicated with the second port C1, the third port S1 is controlled to be communicated with the fourth port E1, the first port D2 of the second four-way valve 3 is controlled to be communicated with the second port C2, the third port S2 is controlled to be communicated with the fourth port E2, and the first control valve 4, the second control valve 5 and the third control valve 6 are controlled to be in a conducting state.

In some embodiments, when the operation mode is the second dehumidification and reheat mode, the first port D1 of the first four-way valve 2 is controlled to be communicated with the fourth port E1, the second port C1 is controlled to be communicated with the third port S1, the first port D2 of the second four-way valve 3 is controlled to be communicated with the second port C2, the third port S2 is controlled to be communicated with the fourth port E2, the first control valve 4 is controlled to be in a blocking state, and the second control valve 5 and the third control valve 6 are both controlled to be in a conducting state.

In some embodiments, when the operation mode is the third dehumidification and reheat mode, the first port D1 of the first four-way valve 2 is controlled to be communicated with the second port C1, the third port S1 is controlled to be communicated with the fourth port E1, the first port D2 of the second four-way valve 3 is controlled to be communicated with the fourth port E2, the second port C2 is controlled to be communicated with the third port S2, the second control valve 5 is controlled to be in a blocking state, and the first control valve 4 and the third control valve 6 are both controlled to be in a conducting state.

In some embodiments, when the operation mode is the cooling mode, the first port D1 of the first four-way valve 2 is controlled to be communicated with the second port C1, the third port S1 is controlled to be communicated with the fourth port E1, the first port D2 of the second four-way valve 3 is controlled to be communicated with the second port C2, the third port S2 is controlled to be communicated with the fourth port E2, the third control valve 6 is controlled to be in a blocking state, and the first control valve 4 and the second control valve 5 are both controlled to be in a conducting state.

In some embodiments, when the operation mode is the first heating mode, the first port D1 of the first four-way valve 2 is controlled to be communicated with the fourth port E1, the second port C1 is controlled to be communicated with the third port S1, the first port D2 of the second four-way valve 3 is controlled to be communicated with the fourth port E2, the second port C2 is controlled to be communicated with the third port S2, and the first control valve 4, the second control valve 5 and the third control valve 6 are all controlled to be in a conducting state.

In some embodiments, when the operation mode is the second heating mode, the first port D1 of the first four-way valve 2 is controlled to be communicated with the fourth port E1, the second port C1 is controlled to be communicated with the third port S1, the first port D2 of the second four-way valve 3 is controlled to be communicated with the fourth port E2, the second port C2 is controlled to be communicated with the third port S2, the third control valve 6 is controlled to be in a blocking state, and the first control valve 4 and the second control valve 5 are both controlled to be in a conducting state.

In some embodiments, when the operation mode is the first defrosting mode, the first port D1 of the first four-way valve 2 is controlled to communicate with the second port C1, the third port S1 is controlled to communicate with the fourth port E1, the first port D2 of the second four-way valve 3 is controlled to communicate with the fourth port E2, the second port C2 is controlled to communicate with the third port S2, the first control valve 4 and the third control valve 6 are controlled to be in the blocking state, and the second control valve 5 is controlled to be in the conducting state.

In some embodiments, when the operation mode is the second frost removal mode, the first port D1 of the first four-way valve 2 is controlled to communicate with the fourth port E1, the second port C1 is controlled to communicate with the third port S1, the first port D2 of the second four-way valve 3 is controlled to communicate with the second port C2, the third port S2 is controlled to communicate with the fourth port E2, the second control valve 5 and the third control valve 6 are controlled to be in a blocking state, and the first control valve 4 is controlled to be in a conducting state.

The present disclosure also provides a control device of a heat pump system, including: a memory configured to store instructions; a processor coupled to the memory, the processor configured to execute a method of implementing the heat pump system control described above based on instructions stored by the memory.

The present disclosure also provides an air conditioning apparatus including the heat pump system and/or the control device of the heat pump system.

The present disclosure also provides a computer readable storage medium, wherein the computer readable storage medium stores computer instructions, which when executed by a processor, implement the heat pump system control method described above.

In some embodiments, the memory comprises high-speed RAM memory, non-volatile memory, or the like, and in other embodiments, the memory comprises a memory array. The storage may also be partitioned and the blocks may be combined into virtual volumes according to certain rules. The processor includes a central processing unit CPU, or an application Specific Integrated circuit asic, or one or more Integrated circuits configured to implement the control method of the heat pump system of the present disclosure.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made without departing from the principles of the invention, and these modifications and equivalents are intended to be included within the scope of the claims.