阅读说明：本技术 一种多联热泵系统及其控制方法和装置 (multi-connected heat pump system and control method and device thereof ) 是由 李丛来 曹培春 张永雷 王战术 于 2019-09-03 设计创作，主要内容包括：本申请实施例提供一种多联热泵系统及其控制方法和装置,涉及空调领域,解决了除湿模式下室内温度较低的技术问题。该多联热泵系统包括：室外机组和至少一个室内机组；室外机组包括：压缩机、四通阀、第一换热器、第二换热器和循环水泵；室内机组包括：室内换热器和地暖管道；通过第一阀门和第二阀门控制冷媒的导通情况。本申请应用于多联热泵系统。(The embodiment of the application provides a multi-connected heat pump system and a control method and device thereof, relates to the field of air conditioners and solves the technical problem of low indoor temperature in a dehumidification mode. This many online heat pump systems includes: an outdoor unit and at least one indoor unit; the outdoor unit includes: the system comprises a compressor, a four-way valve, a first heat exchanger, a second heat exchanger and a circulating water pump; the indoor unit includes: indoor heat exchanger and floor heating pipeline; the conduction condition of the refrigerant is controlled by the first valve and the second valve. The application is applied to a multi-connected heat pump system.)

1. a multiple heat pump system, comprising: an outdoor unit and at least one indoor unit; the outdoor unit includes: the system comprises a compressor, a four-way valve, a first heat exchanger, a second heat exchanger and a circulating water pump; the indoor unit includes: indoor heat exchanger and floor heating pipeline;

the air outlet end of the compressor is connected with the first end of the four-way valve and the first end of the first heat exchanger;

the second end of the four-way valve is connected with the first end of the second heat exchanger; the third end of the four-way valve is connected with the air inlet end of the compressor; the fourth end of the four-way valve is connected with the first end of the indoor heat exchanger;

the second end of the first heat exchanger is connected with the first end of a first valve; the second end of the first valve is connected with the second end of the second heat exchanger and the first end of the second valve; the second end of the second valve is connected with the second end of the indoor heat exchanger;

the third end of the first heat exchanger is connected with the water outlet end of the floor heating pipeline; the fourth end of the first heat exchanger is connected with the water return end of the floor heating pipeline through the circulating water pump;

The third end of the first heat exchanger and the fourth end of the first heat exchanger are communicated in the first heat exchanger, and the first end of the first heat exchanger and the second end of the first heat exchanger are communicated in the first heat exchanger.

2. a multi-gang heat pump system as in claim 1, wherein the second end of the second heat exchanger is connected to a first end of a third valve through a first filter, and the second end of the third valve connects the first end of the second valve to the second end of the first valve.

3. A multi-gang heat pump system as in claim 2, wherein the first valve, the second valve, and the third valve are electronic expansion valves.

4. A multi-gang heat pump system as in claim 1, wherein a second filter is disposed between the first heat exchanger and the first valve.

5. A control method of a multiple heat pump system as set forth in any one of claims 1-4, comprising:

The first end of the four-way valve is connected with the second end of the four-way valve, the third end of the four-way valve is connected with the fourth end of the four-way valve, and the circulating water pump, the first valve and the second valve are controlled to be opened; the multi-connected heat pump system enters a first mode.

6. A control method of a multi-split heat pump system as claimed in claim 5, wherein the controlling of the opening of the first valve specifically comprises:

and controlling the first valve to open a first preset opening degree so as to enable the temperature of the floor heating pipeline to reach a first preset temperature.

7. a control method of a multi-split heat pump system as claimed in claim 5, wherein the controlling of the second valve opening specifically comprises:

And controlling the second valve to open a second preset opening degree so as to enable the air outlet temperature of the indoor fan to reach a second preset temperature.

8. The control method of a multi-split heat pump system as claimed in claim 5, further comprising, after the multi-split heat pump system enters the first mode:

acquiring indoor humidity;

Judging whether the indoor humidity is greater than a preset humidity or not;

If the indoor humidity is not greater than the preset humidity, controlling the circulating water pump, the first valve and the second valve to be closed; the multi-connected heat pump system exits the first mode.

9. a control method of a multiple heat pump system as claimed in claim 5, further comprising:

Controlling the first end of the four-way valve to be connected with the fourth end of the four-way valve, controlling the second end of the four-way valve to be connected with the third end of the four-way valve, controlling the circulating water pump to be started, controlling the first valve to be opened to the maximum opening degree, and controlling the second valve to be closed; the multi-connected heat pump system enters a second mode;

controlling a first end of the four-way valve to be connected with a fourth end of the four-way valve, controlling a second end of the four-way valve to be connected with a third end of the four-way valve, controlling the circulating water pump and the first valve to be closed, and controlling the second valve to be opened to the maximum opening degree; the multi-connected heat pump system enters a third mode;

Controlling a first end of the four-way valve to be connected with a fourth end of the four-way valve, controlling a second end of the four-way valve to be connected with a third end of the four-way valve, controlling the circulating water pump to be started, controlling the first valve to be opened to a third preset opening degree, and controlling the second valve to be opened to a fourth preset opening degree; the multi-connected heat pump system enters a fourth mode;

Controlling a first end of the four-way valve to be connected with a second end of the four-way valve, controlling a third end of the four-way valve to be connected with a fourth end of the four-way valve, controlling the circulating water pump and the first valve to be closed, and controlling the second valve to be opened to the maximum opening degree; and the multi-connected heat pump system enters a fifth mode.

10. a control apparatus of a multiple heat pump system as set forth in any one of claims 1-4, comprising: a control unit;

The control unit is used for controlling the first end of the four-way valve to be connected with the second end of the four-way valve, controlling the third end of the four-way valve to be connected with the fourth end of the four-way valve, and controlling the circulating water pump, the first valve and the second valve to be opened; the multi-connected heat pump system enters a first mode.

Technical Field

The invention relates to the field of air conditioners, in particular to a multi-connected heat pump system and a control method and device thereof.

background

With the development of society and the improvement of living standard of people, the requirements of people on living environment are higher and higher, and especially the requirements on air quality are more and more emphasized. The dehumidification mode is to remove the moisture in the air to improve the air quality. In the existing air conditioner, the operation principle of the dehumidification mode is the same as that of the refrigeration mode, after the air conditioner is started, a heat exchanger of an indoor unit is used as an evaporator to absorb heat, when the room air is sucked by a fan of the indoor unit and passes through the evaporator, moisture in the air is condensed into water, and then the water is collected into a drain pipe to be led to the outside to be discharged.

However, since the evaporator of the air conditioner absorbs heat in the dehumidification mode, the indoor temperature is reduced to a certain extent, and in the dehumidification mode, the indoor moisture is reduced, the humidity is reduced, and the sensible temperature is lower with drier air.

Disclosure of Invention

the embodiment of the application provides a multi-connected heat pump system and a control method and device thereof, which can keep indoor temperature unchanged in a dehumidification mode.

in order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

In a first aspect, an embodiment of the present application provides a multiple heat pump system, including: an outdoor unit and at least one indoor unit; the outdoor unit includes: the system comprises a compressor, a four-way valve, a first heat exchanger, a second heat exchanger and a circulating water pump; the indoor unit includes: indoor heat exchanger and floor heating pipeline;

The air outlet end of the compressor is connected with the first end of the four-way valve and the first end of the first heat exchanger;

The second end of the four-way valve is connected with the first end of the second heat exchanger; the third end of the four-way valve is connected with the air inlet end of the compressor; the fourth end of the four-way valve is connected with the first end of the indoor heat exchanger;

The second end of the first heat exchanger is connected with the first end of the first valve; the second end of the first valve is connected with the second end of the second heat exchanger and the first end of the second valve; the second end of the second valve is connected with the second end of the indoor heat exchanger;

The third end of the first heat exchanger is connected with the water outlet end of the floor heating pipeline; the fourth end of the first heat exchanger is connected with the water return end of the floor heating pipeline through a circulating water pump;

The third end of the first heat exchanger and the fourth end of the first heat exchanger are communicated in the first heat exchanger, and the first end of the first heat exchanger and the second end of the first heat exchanger are communicated in the first heat exchanger.

in a second aspect, a control method for a multiple heat pump system is provided, where the multiple heat pump system of the first aspect includes:

The first end of the four-way valve is connected with the second end of the four-way valve, the third end of the four-way valve is connected with the fourth end of the four-way valve, and the circulating water pump, the first valve and the second valve are controlled to be opened; the multi-connected heat pump system enters a first mode.

In a third aspect, a control device for a multiple heat pump system according to the first aspect is provided, including: a control unit;

The control unit is used for controlling the first end of the four-way valve to be connected with the second end of the four-way valve, controlling the third end of the four-way valve to be connected with the fourth end of the four-way valve and controlling the circulating water pump, the first valve and the second valve to be opened; the multi-connected heat pump system enters a first mode.

The embodiment of the application provides a multi-connected heat pump system and a control method and a device thereof, wherein a first end of a four-way valve is controlled to be connected with a second end of the four-way valve, a third end of the four-way valve is controlled to be connected with a fourth end of the four-way valve, a circulating water pump, a first valve and a second valve are controlled to be opened, so that the multi-connected heat pump system enters a first mode, the first mode is a dehumidification mode, after a refrigerant flows out of a compressor, as the first end of the four-way valve is controlled to be connected with the second end of the four-way valve and the third end of the four-way valve is controlled to be connected with the fourth end of the four-way valve, the refrigerant respectively enters a first heat exchanger and a second heat exchanger, as the second valve is controlled to be opened, a part of the refrigerant enters an indoor; the other part of the refrigerant enters the first heat exchanger and releases heat, and the circulating water pump is controlled to be started, so that the heat released by the refrigerant in the first heat exchanger enters the floor heating pipeline through the circulating water pump to provide heat for the indoor space; because the refrigerant among the indoor heat exchanger begins to absorb the heat and dehumidifies, first heat exchanger passes through the floor heating pipe and provides heat for indoor, so the many online heat pump system that this application embodiment provided has guaranteed that indoor temperature is unchangeable simultaneously, for the room air lasts the dehumidification, has satisfied the pursuit of user to the comfortable air quality, has improved user's comfort level.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

fig. 1 is a schematic diagram illustrating a structure and operation of a general outdoor unit of an air conditioner according to the prior art;

fig. 2 is a schematic structural diagram of a multiple heat pump system according to an embodiment of the present disclosure;

Fig. 3 is a schematic structural diagram of a multiple heat pump system according to an embodiment of the present disclosure;

Fig. 4 is a schematic structural diagram three of a multiple heat pump system provided in an embodiment of the present application;

Fig. 5 is a schematic flow chart of a control method of a multiple heat pump system according to an embodiment of the present disclosure;

Fig. 6 is a first schematic diagram illustrating the working principle of a multiple heat pump system according to an embodiment of the present disclosure;

Fig. 7 is a schematic diagram of a working principle of a multiple heat pump system according to an embodiment of the present disclosure;

fig. 8 is a third schematic diagram illustrating the working principle of a multiple heat pump system according to an embodiment of the present disclosure;

Fig. 9 is a fourth schematic diagram illustrating the working principle of a multiple heat pump system according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram of an operating principle of a multiple heat pump system according to an embodiment of the present disclosure;

Fig. 11 is a schematic diagram of a control device of a multiple heat pump system according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

for the convenience of clearly describing the technical solutions of the embodiments of the present application, in the embodiments of the present invention, the words "first", "second", and the like are used for distinguishing the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the words "first", "second", and the like are not limited in number or execution order.

For the sake of convenience in describing the technical solution of the embodiment of the present application, in the embodiment of the present invention, the unit of the opening degree of the electronic expansion valve is "steps" (pls), for example: the opening of the third valve was controlled and adjusted to 51 pls.

Referring to fig. 1, the conventional air conditioner includes: the control method comprises the following steps that when the existing air conditioner enters a dehumidification mode, the control method comprises the following steps: controlling the second valve 9 to be opened and controlling the third valve 10 to be opened; the refrigerant in the compressor 1 firstly flows into the outdoor heat exchanger 4 through the four-way reversing valve 2 for heat exchange, and the second valve 9 and the third valve 10 are opened, so that after the refrigerant flows into the indoor heat exchanger 6, the indoor heat exchanger 6 starts absorbing heat as an evaporator, when the room air is sucked by a fan of an indoor unit and passes through the indoor heat exchanger 6, the moisture in the air is condensed into water, and then the water is collected into a drain pipe to be led to the outside to be discharged. However, since the indoor heat exchanger 6 of the air conditioner absorbs heat in the dehumidification mode, the indoor temperature is reduced to a certain extent, and in the dehumidification mode, the indoor moisture is reduced, the humidity is reduced, and the sensible temperature is lower with drier air.

in order to solve the above technical problem, an embodiment of the present application provides a multiple heat pump system, as shown in fig. 2, including: an outdoor unit group 21 and at least one indoor unit group 22(22-1 and 22-2); it should be noted that at least one indoor unit group may be 3 indoor unit groups, and may also be other indoor unit groups with a number greater than or equal to 2, in this embodiment of the present application, 2 indoor unit groups are taken as an example, but not limited to 2 indoor unit groups.

exemplarily, as shown in fig. 3, on the basis of the multiple heat pump system shown in fig. 2, the multiple heat pump system provided in the embodiment of the present application further includes: the indoor unit 22(22-1 and 22-2) comprises a bus controller 30, a soft water outlet joint 31, a soft water return joint 32, a filter 33, a manual water outlet valve 34 and a manual water return valve 35: indoor fan units (23-1 and 23-2), line controllers (30-1 and 30-2), indoor valves (36-1 and 36-2), water distribution valves (37-1 and 37-2), water collection valves (38-1 and 38-2), water distributors (39-1 and 39-2) and water collectors (310-1 and 310-2), indoor fan units (23-1 and 23-2), line controllers (30-1 and 30-2), water distributors (39-1 and 39-2), water collectors (310-1 and 310-2), indoor valves (36-1 and 36-2), water distribution valves (37-1 and 37-2) and water collection valves (38-1 and 38-2) in the indoor units 22(22-1 and 22-2) are in one-to-one correspondence; a refrigerant pipeline of the outdoor unit 21 is directly connected with indoor fan units (23-1 and 23-2) of the indoor unit 22; the control circuit of the outdoor unit 21 is connected with the line controllers (30-1 and 30-2) of the indoor unit 22 through the bus controller 30; the water outlet of the water pipeline of the outdoor unit 21 is connected with the water separators (39-1 and 39-2) of the indoor unit 22 through the water outlet soft joint 31, the filter 33 and the water outlet manual valve 34; the water return port of the water pipe of the outdoor unit 21 is connected with the water collectors (310-1 and 310-2) of the indoor unit 22 through the water return soft joint 32 and the water return manual valve 35.

the outdoor unit 21 in fig. 3 is the same as the outdoor unit 21 in fig. 2, and the indoor unit 22 in fig. 3 is the same as the indoor unit 22 in fig. 2.

The bus controller 30 is used for controlling the opening and closing of all valves in the indoor unit 22; the line controllers (30-1 and 30-2) are respectively connected with the indoor valves (36-1 and 36-2), the water distribution valves (37-1 and 37-2) and the water collection valves (38-1 and 38-2) and are used for controlling the indoor valves (36-1 and 36-2), the water distribution valves (37-1 and 37-2) and the water collection valves (38-1 and 38-2) to be opened and closed; the manual water outlet valve 34 is used for controlling the opening and closing of pipelines of water flowing to the water separators (39-1 and 39-2); the backwater manual valve 35 is used for controlling the opening and closing of pipelines of water flowing to the water collectors (310-1 and 310-2); the filter 33 is used for filtering the water flowing to the water separators (39-1 and 39-2) and preventing the water flowing into the water separators (39-1 and 39-2) from scaling due to poor water quality.

As shown in fig. 4, on the basis of the multiple heat pump systems shown in fig. 2 and fig. 3, an embodiment of the present application provides a multiple heat pump system, including: an outdoor unit group 21 and at least one indoor unit group 22; wherein, the outdoor unit 21 in fig. 4 is the same as the outdoor unit 21 in fig. 3 and the outdoor unit 21 in fig. 2, and the indoor unit 22 in fig. 4 is the same as the indoor unit 22 in fig. 3 and the indoor unit 22 in fig. 2;

the outdoor unit 21 includes: a compressor 211, a four-way valve 212, a first heat exchanger 213, a second heat exchanger 214, a circulating water pump 215, and a first valve 218;

the indoor unit 22 includes: an indoor fan sub-unit 221-1 and an indoor floor heating sub-unit 221-2; the indoor fan sub-unit 221-1 includes: indoor heat exchangers 226(226-1 and 226-2) and second valves 229(229-1 and 229-2); indoor ground heating subunit 221-2 includes: floor heating ducts 227(227-1 and 227-2); wherein, the floor heating pipe 227 in fig. 4 comprises the water outlet soft joint 31, the water return soft joint 32, the filter 33, the water outlet manual valve 34, the water return manual valve 35, the water distribution valves (37-1 and 37-2), the water collection valves (38-1 and 38-2), the water distributors (39-1 and 39-2), the water collectors (310-1 and 310-2) and corresponding pipelines in fig. 3, and the indoor heat exchangers 226(226-1 and 226-2) and the second valves 229(229-1 and 229-2) in fig. 4 belong to the indoor fan units (23-1 and 23-2) in fig. 3;

specifically, the floor heating pipe 227-1, the indoor heat exchanger 226-1 and the second valve 229-1 in fig. 4 belong to the indoor unit 22-1 in fig. 3, the floor heating pipe 227-2, the indoor heat exchanger 226-2 and the second valve 229-2 in fig. 4 belong to the indoor unit 22-2 in fig. 3, the floor heating pipe 227-1 in fig. 4 includes the water distribution valve 37-1, the water collection valve 38-1, the water distributor 39-1 and the water collector 310-1 in fig. 3, the floor heating pipe 227-2 in fig. 4 includes the water distribution valve 37-2, the water collection valve 38-2, the water distributor 39-2 and the water collector 310-2 in fig. 3, the indoor heat exchanger 226-1 and the second valve 229-1 in fig. 4 belong to the indoor fan unit 23-1 in fig. 3, the indoor heat exchanger 226-2 and the second valve 229-2 of fig. 4 belong to the indoor fan unit 23-2 of fig. 3.

The air outlet end of the compressor 211 is connected with the first end of the four-way valve 212 and the first end of the first heat exchanger 213; a second end of the four-way valve 212 is connected to a first end of a second heat exchanger 214; the third end of the four-way valve 212 is connected with the air inlet end of the compressor 211; a fourth end of the four-way valve 212 is connected to a first end of the indoor heat exchanger 226; a second end of the first heat exchanger 213 is connected to a first end of a first valve 218; a second end of the first valve 218 is connected to a second end of the second heat exchanger 214 and a first end of a second valve 229; a second end of the second valve 229 is connected to a second end of the indoor heat exchanger 226; the third end of the first heat exchanger 213 is connected with the water outlet end of the floor heating pipeline 227; the fourth end of the first heat exchanger 213 is connected with the water return end of the floor heating pipeline 227 through a circulating water pump 215; the third end of the first heat exchanger 213 and the fourth end of the first heat exchanger 213 communicate with each other inside the first heat exchanger 213, and the first end of the first heat exchanger 213 and the second end of the first heat exchanger 213 communicate with each other inside the first heat exchanger 213.

Optionally, as shown in fig. 4, the outdoor unit 21 further includes: third valve 2110 and first filter 2111; a second end of the second heat exchanger 214 is connected to a first end of a third valve 2110 through a first filter 2111, and a second end of the third valve 2110 is connected to a first end of the second valve 229 and a second end of the first valve 218; the flow rate of the refrigerant flowing into the second heat exchanger 214 or the flow rate of the refrigerant flowing out of the second heat exchanger 214 is adjusted by controlling the opening degree of the third valve 2110, and the first filter 2111 is used for filtering impurities in the refrigerant passing through the third valve 2110, so that the third valve 2110 is not easily damaged.

optionally, as shown in fig. 4, the first valve 218, the second valve 229 and the third valve 2110 are electronic expansion valves; the electronic expansion valve is used for adjusting the flow rate of the refrigerant flowing through the electronic expansion valve, and the larger the opening degree of the electronic expansion valve is, the larger the flow rate of the refrigerant is, the smaller the opening degree of the electronic expansion valve is, and the smaller the flow rate of the refrigerant is.

optionally, as shown in fig. 4, the outdoor unit 21 further includes: a second filter 2112; the second filter 2112 is disposed between the first heat exchanger 213 and the first valve 218; the second filter 2112 is used for filtering impurities in the refrigerant passing through the first valve 218, so that the first valve 218 is not easily damaged.

Illustratively, as shown in fig. 4, the outdoor unit 21 further includes: a third filter 2113 and a liquid side stop valve 2114, a first end of the third filter 2113 being connected to a second end of the third valve 2110 and a second end of the first valve 218, respectively, and a second end of the third filter 2113 being connected to a first end of the second valve 229 via the liquid side stop valve 2114; the third filter 2113 is used for filtering impurities in the refrigerant passing through the liquid side stop valve 2114, so that the liquid side stop valve 2114 is not easily damaged, and the liquid side stop valve 2114 is used for controlling the opening and closing of a pipeline of the refrigerant flowing to the indoor heat exchanger 226.

Illustratively, as shown in fig. 4, the outdoor unit 21 further includes: a gas-side shutoff valve 2115; the air side shutoff valve 2115 is disposed between the indoor heat exchanger 226 and the fourth end of the four-way valve 212, and the air side shutoff valve 2115 controls opening and closing of a pipe line through which the refrigerant passing through the indoor heat exchanger 226 flows to the four-way valve 212.

Illustratively, as shown in fig. 4, the outdoor unit 21 further includes: a low-pressure switch 2116, a high-pressure switch 2117, a high-pressure sensor 2118, a low-pressure sensor 2119, and a gas-liquid separator 2120; a first end of the low-pressure switch 2116 is connected with the air inlet end of the compressor 211, and a second end of the low-pressure switch 2116 is connected with a third end of the four-way valve through a gas-liquid separator 2120; a first end of a high-pressure sensor 2118 is connected with an air outlet end of the compressor 211 through a high-pressure switch 2117, and a second end of the high-pressure sensor 2118 is respectively connected with a first end of the four-way valve 212 and a first end of the first heat exchanger 213; a low pressure sensor 2119 is disposed between the second end of the four-way valve 212 and the first end of the second heat exchanger 214; the low pressure sensor 2119 is used for detecting a low pressure value at the air inlet end of the compressor, and when the low pressure value detected by the low pressure sensor 2119 is lower than a preset low pressure value, the multi-connected heat pump system may malfunction, for example: refrigerant leakage or blockage, and the like, and the compressor 211 can be protected from being damaged by controlling the low-pressure switch 2116 to be closed; similarly, high pressure sensor 2118 is used for detecting the high pressure value at the compressor outlet end, and when the high pressure value detected by high pressure sensor 2118 is higher than the preset high pressure value, the multi-connected heat pump system may malfunction, for example: system overload, etc., and the compressor 211 can be protected from damage by controlling the high-voltage switch 2117 to be closed; in the multiple heat pump system, since the compression ratio of the liquid is small, if the liquid is sucked into the compressor 211, the valve sheet of the compressor 211 and even the power component of the compressor 211 are easily damaged, and the gas-liquid separator 2120 is used for storing the liquid in the gas-liquid separator 2120, preventing the liquid from entering the compressor 211, and playing a role in protecting the compressor 211.

for convenience, as shown in fig. 4, 6, 7, 8, 9 and 10, the four-way selector valve 2 is indicated by E, F, G, H at the first, second, third and fourth ends thereof.

As shown in fig. 5, the embodiment of the present application further provides a control method of the multi-split heat pump system as shown in fig. 4, and in practice, the following method may be implemented by the bus controller 30 or the line controllers (30-1, 30-2, and 30-3) as shown in fig. 3, and specifically includes S101:

s101, controlling a first end of the four-way valve 212 to be connected with a second end of the four-way valve 212, controlling a third end of the four-way valve 212 to be connected with a fourth end of the four-way valve 212, controlling the circulating water pump 215 to be started, controlling the first valve 218 to be started, controlling the second valve 229 to be started, and enabling the multi-split heat pump system to enter a first mode.

Wherein, the first mode is a dehumidification mode.

optionally, the controlling the opening of the first valve 218 specifically includes: the first valve 218 is controlled to open a first preset opening degree (for example, 200pls, which may be other values, which is not limited herein) so that the temperature of the floor heating pipe 227 reaches a first preset temperature (for example, 15 degrees celsius, which may also be other values, which is not limited herein), because the flow rate of the refrigerant flowing into the first heat exchanger 213 may be adjusted by controlling the opening degree of the first valve 218, and the efficiency of heat exchange of water in the floor heating pipe 227 in the first heat exchanger 213 may be controlled by the flow rate of the refrigerant flowing into the first heat exchanger 213, the first valve 218 may be controlled to open the first preset opening degree so that the temperature of the floor heating pipe 227 reaches the first preset temperature.

Optionally, controlling the opening of the second valve specifically includes: the second valve 229 is controlled to open a second preset opening (for example, 220pls, or other values, which is not limited herein) so that the outlet air temperature of the indoor fan reaches a second preset temperature (for example, 13 degrees celsius, or other values, which is not limited herein), because the flow rate of the refrigerant flowing into the second heat exchanger 6 can be adjusted by controlling the opening of the second valve 229, and the flow rate of the refrigerant flowing into the second heat exchanger 6 can control the heat exchange efficiency of the refrigerant in the second heat exchanger 6, the second valve 229 can be controlled to open the second preset opening so that the outlet air temperature of the indoor fan reaches the second preset temperature.

for example, as shown in fig. 6, the direction of the arrow in the figure is the flow direction of the refrigerant, a part of the refrigerant in the compressor 211 enters the first heat exchanger 213, and since the circulating water pump 215 is controlled to be turned on, water in the floor heating pipe 227 enters the first heat exchanger 213 through the circulating water pump 215 to exchange heat with the refrigerant, so as to provide heat for the indoor space, and since the first valve 218 is controlled to be turned on, the refrigerant after heat exchange flows out through the first valve 218; since the E terminal and the F terminal of the four-way valve 212 are connected, another part of the refrigerant in the compressor 211 passes through the second heat exchanger 214 and merges with the refrigerant flowing out through the first valve 218; since the second valve 229 is controlled to be opened, the refrigerant enters the indoor heat exchanger 226 to dehumidify the indoor, after the refrigerant passes through the indoor heat exchanger 226, since the H end and the G end of the four-way valve 212 are controlled to be connected, the refrigerant can return to the compressor 211 through the four-way valve 212 to form a circulation, the multi-split heat pump system enters a first mode, the first mode is used for dehumidifying the indoor, since the second valve 229 is controlled to be opened to a second preset opening degree so that the outlet air temperature of the indoor fan reaches a second preset temperature, that is, the indoor temperature is reduced when the indoor heat exchanger 226 dehumidifies the indoor, and the first valve 218 is controlled to be opened to a first preset opening degree so that the temperature of the floor heating pipe 227 reaches a first preset temperature, that the floor heating pipe 227 provides heat for the indoor, and the first preset temperature and the second preset temperature can ensure that the indoor temperature is kept constant, therefore, the multi-split heat pump system provided by the embodiment of the present application ensures, the air quality control system can continuously dehumidify indoor air, meets the pursuit of users on the quality of comfortable air, and improves the comfort of the users.

Optionally, as shown in fig. 5, after the multi-split heat pump system enters the first mode, the method further includes, S102-104:

S102, acquiring indoor humidity.

The line controller may acquire the indoor humidity through the humidity sensor, or may acquire the indoor humidity in other manners, which is not limited herein.

s103, judging whether the indoor humidity is larger than the preset humidity.

If the indoor humidity is not greater than the preset humidity, S104 is performed, and if the indoor humidity is greater than the preset humidity, S102 is performed.

And S104, controlling the circulating water pump 215, the first valve 218 and the second valve 229 to be closed.

When the indoor humidity is not greater than the preset humidity, the water in the refrigerant and the water in the floor heating pipeline 227 are not recirculated due to the fact that the circulating water pump 215, the first valve 218 and the second valve 229 are controlled to be closed, the multi-connected heat pump system exits from the first mode, the multi-connected heat pump system does not dehumidify indoors any more, and if the multi-connected heat pump system needs to enter other modes, the multi-connected heat pump system is controlled to enter through other control methods, and the control is not limited herein.

In practical applications, controlling the first valve 218 to close may cause the refrigerant to accumulate too much in the first valve 218, so as to damage the first valve 218, and therefore, controlling the opening degree of the first valve 218 to be adjusted to a preset standby opening degree (for example, 100pls, or other values, which is not limited herein); when the opening degree of the first valve 218 is controlled to be adjusted to the preset standby opening degree, the circulating water pump 215 is in a closed state, so that when the refrigerant flows into the first heat exchanger 213 from the first valve 218, the refrigerant does not provide heat for the floor heating pipeline 227 even if the refrigerant exchanges heat in the first heat exchanger 213; hereinafter, if the first valve 218 is controlled to be closed again, the opening of the first valve 218 may also be controlled to be adjusted to the preset standby opening, which will not be described in detail below.

In practical applications, controlling the second valve 229 to close may cause the refrigerant to be accumulated too much in the second valve 229, so as to damage the second valve 229, and thus controlling the opening of the second valve 229 to be adjusted to the preset standby opening; when the opening degree of the second valve 229 is controlled to be adjusted to the preset standby opening degree, the indoor fan is in a closed state, so that when the refrigerant flows into the indoor heat exchanger 226 from the second valve 229, the refrigerant does not release air from the indoor fan even though heat exchange is performed in the indoor heat exchanger 226; hereinafter, if the second valve 229 is controlled to be closed again, the opening degree of the second valve 229 may be controlled to be adjusted to the preset standby opening degree, which will not be described in detail below.

optionally, another control method of the multiple heat pump system shown in fig. 4 is provided in the embodiments of the present application, and in practice, the following method may be implemented by the bus controller 30 or the line controllers (30-1, 30-2, and 30-3) in fig. 3, so as to implement different operation modes of the multiple heat pump system, including four modes a, b, c, and d:

a. a first end of the four-way valve 212 is connected with a fourth end of the four-way valve 212, a second end of the four-way valve 212 is connected with a third end of the four-way valve 212, the circulating water pump 215 is controlled to be started, the first valve 218 is controlled to be opened at the maximum opening degree, and the second valve 229 is controlled to be closed; and the multi-connected heat pump system enters a second mode.

and the second mode is a floor heating mode.

For example, as shown in fig. 7, an arrow direction in the figure is a flow direction of a refrigerant, the refrigerant in the compressor 211 enters the first heat exchanger 213, and since the circulating water pump 215 is controlled to be opened, water in the floor heating pipe 227 enters the first heat exchanger 213 through the circulating water pump 215 to exchange heat with the refrigerant, so as to provide heat for a room, a floor heating mode is realized, and since the first valve 218 is controlled to be opened to a maximum opening degree (for example, 2000pls, the maximum opening degree may also be determined according to a type of the first valve 218, which is not limited herein), the refrigerant after heat exchange flows out through the first valve 218; since the E terminal of the control four-way valve 212 is connected to the H terminal, the F terminal of the control four-way valve 212 is connected to the G terminal, and the second valve 229 is controlled to be closed, the refrigerant flowing out of the first valve 218 flows back to the compressor through the second heat exchanger 214, the F terminal and the G terminal of the four-way valve, and a circulation of the floor heating mode is formed.

b. A first end of the four-way valve 212 is connected with a fourth end of the four-way valve 212, a second end of the four-way valve 212 is connected with a third end of the four-way valve 212, the circulating water pump 215 is controlled to be closed, the first valve 218 is controlled to be closed, and the second valve 229 is controlled to be opened to the maximum opening degree; and the multi-connected heat pump system enters a third mode.

And the third mode is a fan heating mode.

For example, as shown in fig. 8, the direction of an arrow in the figure is a flow direction of a refrigerant, the refrigerant in the compressor 211 enters the first heat exchanger 213, and since the E end of the four-way valve 212 is controlled to be connected with the H end, the refrigerant flows into the indoor heat exchanger 226 through the four-way valve 212, heat exchange is performed in the indoor heat exchanger 226, heat is provided to the room by an indoor fan, so that a fan heating mode is realized, and since the second valve 229 is controlled to be opened to a maximum opening degree (for example, 2000pls, the maximum opening degree may also be determined according to the type of the second valve 229, which is not limited herein), the refrigerant after heat exchange flows out through the second valve 229; since the F terminal of the four-way valve 212 is connected to the G terminal, and the circulating water pump 215 and the first valve 218 are controlled to be closed, the refrigerant flowing out of the second valve 229 flows back to the compressor 211 through the second heat exchanger 214 and the F terminal and the G terminal of the four-way valve, thereby forming a cycle in a fan heating mode.

c. a first end of the four-way valve 212 is connected with a fourth end of the four-way valve 212, a second end of the four-way valve 212 is connected with a third end of the four-way valve 212, the circulating water pump 215 is controlled to be started, the first valve 218 is controlled to be opened to a third preset opening degree, and the second valve 229 is controlled to be opened to a fourth preset opening degree; and the multi-connected heat pump system enters a fourth mode.

And the fourth mode is a simultaneous heating mode of the floor heating fan.

For example, as shown in fig. 9, the direction of an arrow in the figure is a flow direction of a refrigerant, a part of the refrigerant in the compressor 211 enters the first heat exchanger 213, and since the circulating water pump 215 is controlled to be turned on, water in the floor heating pipe 227 enters the first heat exchanger 213 through the circulating water pump 215 to exchange heat with the refrigerant, so as to provide heat for a room, and since the first valve 218 is controlled to be turned on, the refrigerant after heat exchange flows out through the first valve 218; because the end E of the four-way valve 212 is connected with the end H, the other part of the refrigerant in the compressor 211 flows into the indoor heat exchanger 226 through the four-way valve 212, heat exchange is carried out in the indoor heat exchanger 226, heat is provided for the indoor through the indoor fan, the simultaneous heating mode of the floor heating fan is realized, the refrigerant after heat exchange in the indoor heat exchanger 226 flows out through the second valve 229, converges with the refrigerant flowing out of the first valve 218, and flows back to the compressor through the second heat exchanger 214, the end F and the end G of the four-way valve, and the circulation of the simultaneous heating mode of the floor heating fan is formed.

for example, when the multi-split heat pump system enters the fourth mode, the first valve 218 may be controlled to open to a third preset opening degree (e.g., 500pls, which may be other values, which are not limited herein) according to the indoor temperature, and the second valve 229 may be controlled to open to a fourth preset opening degree (e.g., 600pls, which may be other values, which are not limited herein), for example: when the indoor temperature is less than or equal to 15 ℃, the second valve 229 is controlled to be opened to 1500pls, the first valve 218 is controlled to be opened to 500pls, so that most of the refrigerant enters the indoor heat exchanger 226, a small part of the refrigerant enters the first heat exchanger 213, the indoor heat exchanger 226 is used as a main heat exchanger under the condition of low indoor temperature, and the purpose of rapid temperature rise is realized mainly through fan heating; when the indoor temperature is higher than 15 ℃, the first valve 218 is controlled to be opened to 1500pls, the second valve 229 is controlled to be opened to 500pls, so that most of the refrigerant enters the first heat exchanger 213, and a small part of the refrigerant enters the indoor heat exchanger 226, and under the condition that the indoor temperature is relatively stable, the first heat exchanger 213 is used as a main heat exchanger, and the purpose of rapid and comfortable heat exchange is realized mainly through floor heating; in practical applications, the adjustment of the opening degrees of the first valve 218 and the second valve 229 can be controlled by the line controller according to a fuzzy logic algorithm, or the adjustment of the opening degrees of the first valve 218 and the second valve 229 can be controlled by the line controller in other manners, which is not limited herein.

d. A first end of the four-way valve 212 is connected with a second end of the four-way valve 212, a third end of the four-way valve 212 is connected with a fourth end of the four-way valve 212, the circulating water pump 215 is controlled to be closed, the first valve 218 is controlled to be closed, and the second valve 229 is controlled to be opened to the maximum opening degree; and the multi-connected heat pump system enters a fifth mode.

wherein the fifth mode is a cooling mode.

For example, as shown in fig. 10, the direction of the arrow in the figure is the flow direction of the refrigerant, since the E end of the four-way valve 212 is controlled to be connected to the F end, the refrigerant in the compressor 211 flows into the second heat exchanger 214 to release heat, since the first valve 218 and the circulating water pump 215 are controlled to be closed and the second valve 229 is controlled to be opened, the refrigerant flowing out of the second heat exchanger 214 flows into the indoor heat exchanger 226 through the second valve 229 to absorb heat, and the indoor space is cooled, so as to implement the cooling mode, since the H end and the G end of the four-way valve 212 are controlled to be connected, the refrigerant flowing out of the indoor heat exchanger 226 can return to the compressor 211 through the H end and the G end of the four-way valve 212, so as to form.

in the embodiment of the application, the first end of the four-way valve is controlled to be connected with the second end of the four-way valve, the third end of the four-way valve is controlled to be connected with the fourth end of the four-way valve, the circulating water pump is controlled to be started, the first valve is controlled to be started, the second valve is controlled to be started, so that the multi-connected heat pump system enters a first mode, the first mode is a dehumidification mode, after a refrigerant flows out of the compressor, as the first end of the four-way valve is controlled to be connected with the second end of the four-way valve and the third end of the four-way valve is controlled to be connected with the fourth end of the four-way valve, the refrigerant respectively enters the first heat exchanger and the second heat exchanger, as the second valve is controlled to be started, a part of the refrigerant enters the; the other part of the refrigerant enters the first heat exchanger and releases heat, and the circulating water pump is controlled to be started, so that the heat released by the refrigerant in the first heat exchanger enters the floor heating pipeline through the circulating water pump to provide heat for the indoor space; because the refrigerant among the indoor heat exchanger absorbs the heat and dehumidifies, first heat exchanger passes through the floor heating pipe and provides heat for indoor, so the many online heat pump system that this application embodiment provided has guaranteed that indoor temperature is unchangeable simultaneously, for the room air lasts the dehumidification, has satisfied the pursuit of user to the comfortable air quality, has improved user's comfort level.

As shown in fig. 11, in order to better implement the control method of the multi-split heat pump system, an embodiment of the present application provides a control apparatus 200 including the multi-split heat pump system shown in fig. 4, where the apparatus includes: a control unit 201;

a control unit 201, configured to control a first end of the four-way valve 212 to be connected to a second end of the four-way valve 212, control a third end of the four-way valve 212 to be connected to a fourth end of the four-way valve 212, and control the circulating water pump 215, the first valve 218, and the second valve 229 to be opened; the multi-connected heat pump system enters a first mode.

Optionally, the control unit 201 is specifically configured to control the first valve 218 to open a first preset opening degree, so that the temperature of the floor heating pipe 227 reaches a first preset temperature.

optionally, the control unit 201 is specifically configured to control the second valve 229 to open a second preset opening degree, so that the outlet air temperature of the indoor fan reaches a second preset temperature.

Optionally, the control device 200 of the multiple heat pump system further includes: an acquisition unit 202 and a judgment unit 203;

an acquisition unit 202 for acquiring indoor humidity; a judging unit 203 for judging whether the indoor humidity acquired by the acquiring unit 202 is greater than a preset humidity;

The control unit 201 is further configured to control the circulating water pump 215, the first valve 218 and the second valve 229 to be closed when the indoor humidity determined by the determining unit 203 is not greater than the preset humidity; the multi-connected heat pump system exits the first mode.

Optionally, the control unit 201 is further configured to control a first end of the four-way valve 212 to be connected to a fourth end of the four-way valve 212, control a second end of the four-way valve 212 to be connected to a third end of the four-way valve 212, control the circulating water pump 215 to be turned on, control the first valve 218 to be turned on at a maximum opening degree, and control the second valve 229 to be turned off; the multi-connected heat pump system enters a second mode;

The control unit 201 is further configured to control a first end of the four-way valve 212 to be connected to a fourth end of the four-way valve 212, control a second end of the four-way valve 212 to be connected to a third end of the four-way valve 212, control the circulating water pump 215 to be turned on, control the first valve 218 to be turned off, and control the second valve 229 to be turned on to a maximum opening degree; the multi-connected heat pump system enters a third mode;

The control unit 201 is further configured to control a first end of the four-way valve 212 to be connected to a fourth end of the four-way valve 212, control a second end of the four-way valve 212 to be connected to a third end of the four-way valve 212, control the circulating water pump 215 to be turned on, control the first valve 218 to be turned on at a third preset opening degree, and control the second valve 229 to be turned on at a fourth preset opening degree; the multi-connected heat pump system enters a fourth mode;

The control unit 201 is further configured to control a first end of the four-way valve 212 to be connected to a second end of the four-way valve 212, control a third end of the four-way valve 212 to be connected to a fourth end of the four-way valve 212, control the circulating water pump 215 and the first valve 218 to be closed, and control the second valve 229 to be opened to a maximum opening degree; and the multi-connected heat pump system enters a fifth mode.

The control unit 201, the obtaining unit 202, and the determining unit 203 may be processors separately installed in the control apparatus 200 of the multiple heat pump system, or may be implemented by being integrated in a certain processor of the control apparatus 200 of the multiple heat pump system, or may be stored in a memory of the control apparatus 200 of the multiple heat pump system in the form of program codes, and the certain processor of the control apparatus 200 of the multiple heat pump system calls and executes the functions of the control unit 201, the obtaining unit 202, and the determining unit 203. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present application.

it should be noted that the control method and apparatus of the multiple heat pump system provided in the foregoing embodiment are specifically described with reference to the multiple heat pump system shown in fig. 4, but the control method and apparatus of the multiple heat pump system provided in the foregoing embodiment are not limited thereto, and other multiple heat pump systems having related variant structures (for example, a plurality of floor heating pipes are added or a plurality of indoor heat exchangers and corresponding second valves thereof are added) of the multiple heat pump system shown in fig. 4 are also applicable to the technical solutions provided in the foregoing embodiments.

In the multi-connected heat pump system provided by the embodiment of the application, the first end of the four-way valve is controlled to be connected with the second end of the four-way valve through the control unit, the third end of the four-way valve is controlled to be connected with the fourth end of the four-way valve, the circulating water pump, the first valve and the second valve are controlled to be opened, so that the multi-connected heat pump system enters a first mode, the first mode is a dehumidification mode, after a refrigerant flows out of the compressor, as the first end of the four-way valve is controlled to be connected with the second end of the four-way valve and the third end of the four-way valve is controlled to be connected with the fourth end of the four-way valve, the refrigerant respectively enters the first heat exchanger and the second heat exchanger, as the second valve is controlled to be opened, a part of the refrigerant enters the indoor; the other part of the refrigerant enters the first heat exchanger and releases heat, and the circulating water pump is controlled to be started, so that the heat released by the refrigerant in the first heat exchanger enters the floor heating pipeline through the circulating water pump to provide heat for the indoor space; because the refrigerant among the indoor heat exchanger absorbs the heat and dehumidifies, first heat exchanger passes through the floor heating pipe and provides heat for indoor, so the many online heat pump system that this application embodiment provided has guaranteed that indoor temperature is unchangeable simultaneously, for the room air lasts the dehumidification, has satisfied the pursuit of user to the comfortable air quality, has improved user's comfort level.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.