阅读说明：本技术 一种多联机空调系统及其控制方法 (Multi-split air conditioning system and control method thereof ) 是由 曹梦迪 倪毅 王芳 于 2021-02-05 设计创作，主要内容包括：本公开提供一种多联机空调系统及其控制方法,包括：压缩机、室外换热器、第一气侧管、第二气侧管和液侧管,第一气侧管、第二气侧管和液侧管均分别连通在室内侧和室外侧之间,第一气侧管与压缩机的排气端连通；还包括室内机,蓄热模块,所述蓄热模块通过蓄热转换器连接设置在所述第一气侧管、所述第二气侧管和所述液侧管中的至少两个之间；恒温除湿内机,地暖模块,所述地暖模块通过地暖转换器连接设置在所述第一气侧管、所述第二气侧管和所述液侧管中的至少两个之间。根据本公开通过一套系统可以同时实现恒温除湿、蓄热化霜、空调需求、地暖需求的效果,解决用户不同的实际需求,各个模块可以根据实际需要选择接入系统或不接入系统。(The present disclosure provides a multi-split air conditioning system and a control method thereof, including: the air conditioner comprises a compressor, an outdoor heat exchanger, a first air side pipe, a second air side pipe and a liquid side pipe, wherein the first air side pipe, the second air side pipe and the liquid side pipe are respectively communicated between the indoor side and the outdoor side, and the first air side pipe is communicated with an exhaust end of the compressor; the indoor unit further comprises a heat storage module, and the heat storage module is connected and arranged between at least two of the first air side pipe, the second air side pipe and the liquid side pipe through a heat storage converter; the constant-temperature dehumidification indoor unit comprises a floor heating module, wherein the floor heating module is connected and arranged between at least two of the first gas side pipe, the second gas side pipe and the liquid side pipe through a floor heating converter. According to the system, the effects of constant-temperature dehumidification, heat storage defrosting, air conditioning requirements and floor heating requirements can be achieved through one set of system, different actual requirements of users are met, and each module can select to be connected to the system or not to be connected to the system according to actual requirements.)

1. The utility model provides a many online air conditioning system which characterized in that: the method comprises the following steps:

the air conditioner comprises a compressor (1), an outdoor heat exchanger (2), a first air side pipe (31), a second air side pipe (32) and a liquid side pipe (33), wherein the first air side pipe (31), the second air side pipe (32) and the liquid side pipe (33) are respectively communicated between the indoor side and the outdoor side, and the first air side pipe (31) is communicated with a gas discharge end (1a) of the compressor (1);

the air conditioner also comprises at least one indoor unit (61), wherein the indoor unit (61) is connected and arranged between the second air side pipe (32) and the liquid side pipe (33);

the heat storage device also comprises at least one heat storage module (62), wherein the heat storage module (62) is connected and arranged between at least two of the first air side pipe (31), the second air side pipe (32) and the liquid side pipe (33) through a heat storage converter (621);

the constant-temperature dehumidification indoor unit (63) is connected between the first gas-side pipe (31) and the liquid-side pipe (33), and/or the constant-temperature dehumidification indoor unit (63) is connected between the second gas-side pipe (32) and the liquid-side pipe (33);

still include at least one warm up module (9), warm up module (9) and connect through warm up converter (91) and set up first gas side pipe (31), second gas side pipe (32) with between two at least in liquid side pipe (33).

2. A multi-split air conditioning system as set forth in claim 1, wherein:

the indoor unit (61) comprises an indoor heat exchanger (611) and an indoor unit pipeline (101), wherein the indoor heat exchanger (611) and a first throttling device (71) are arranged on the indoor unit pipeline (101).

3. A multi-split air conditioning system as set forth in claim 1 or 2, wherein:

the heat storage device further comprises a second pipeline (102), a third pipeline (103) and a fourth pipeline (104), wherein one end of the second pipeline (102) is communicated to the liquid side pipe (33), the other end of the second pipeline is communicated to the heat storage module (62), one end of the third pipeline (103) is communicated to the second gas side pipe (32), the other end of the third pipeline is communicated to the heat storage module (62), one end of the fourth pipeline (104) is communicated to the first gas side pipe (31), and the other end of the fourth pipeline is communicated to the heat storage module (62);

the heat storage converter (621) comprises a second throttle device (72) arranged on the second line (102), a first control valve (51) arranged on the third line (103) and a second control valve (52) arranged on the fourth line (104).

4. A multi-split air conditioning system as set forth in any one of claims 1 to 3, wherein:

the floor heating system is characterized by further comprising a fifth pipeline (105), a sixth pipeline (106) and a seventh pipeline (107), wherein one end of the fifth pipeline (105) is communicated to the liquid side pipe (33), the other end of the fifth pipeline is communicated to the floor heating module (9), one end of the sixth pipeline (106) is communicated to the second air side pipe (32), the other end of the sixth pipeline is communicated to the floor heating module (9), one end of the seventh pipeline (107) is communicated to the first air side pipe (31), and the other end of the seventh pipeline is communicated to the floor heating module (9);

the floor heating converter (91) comprises a third throttling device (73) arranged on the fifth pipeline (105), a third control valve (53) arranged on the sixth pipeline (106) and a fourth control valve (54) arranged on the seventh pipeline (107).

5. A multi-split air conditioning system as set forth in any one of claims 1 to 4, wherein:

the floor heating module (9) comprises a capillary tube, and at least two of the first air side tube (31), the second air side tube (32) and the liquid side tube (33) are communicated with each other, and a refrigerant flows through the capillary tube to heat the floor heating module through heat exchange.

6. A multi-split air conditioning system as set forth in any one of claims 1 to 5, wherein:

the constant-temperature dehumidification inner machine (63) comprises a first heat exchanger (631) and a second heat exchanger (632), the first heat exchanger (631) is arranged on an eighth pipeline (108), one end of the eighth pipeline (108) is communicated to the second air side pipe (32), the other end of the eighth pipeline is communicated to the liquid side pipe (33), the second heat exchanger (632) is arranged on a ninth pipeline (109), one end of the ninth pipeline (109) is communicated to the first air side pipe (31), and the other end of the ninth pipeline is communicated to the liquid side pipe (33).

7. A multi-split air conditioning system as claimed in claim 6, wherein:

a fourth throttling device (74) is further arranged on the eighth pipeline (108), and a fifth throttling device (75) is further arranged on the ninth pipeline (109).

8. A multi-split air conditioning system as set forth in any one of claims 1 to 7, wherein:

the compressor also comprises a first four-way valve (41) and a second four-way valve (42), wherein the first end (D1) of the first four-way valve (41) is communicated with the fifth end (D2) of the second four-way valve (42) and is communicated to the exhaust end (1a) of the compressor (1) together;

a sixth end (C2) of the second four-way valve (42) is communicated with the outdoor heat exchanger (2), and the other end of the outdoor heat exchanger (2) can be communicated with the first gas side pipe (31);

a third end (E1) of the first four-way valve (41) is communicated with the second gas side pipe (32);

the second end (C1) and the fourth end (S1) of the first four-way valve (41) are communicated with the seventh end (E2) and the eighth end (S2) of the second four-way valve (42) and are communicated to the suction end (1b) of the compressor (1) together.

9. A control method of a multi-split air conditioning system as set forth in any one of claims 1 to 8, wherein: when a first four-way valve (41), the second four-way valve (42), a first throttling device (71) and a second throttling device (72), a third throttling device (73) and a fourth throttling device (74), a fifth throttling device (75) and a first control valve (51), a second control valve (52), a third control valve (53) and a fourth control valve (54) are simultaneously included, mode control of at least one of cooling, heating, heat storage, defrosting and dehumidifying in a room is realized by controlling the first four-way valve (41), the second four-way valve (42), the first throttling device (71) and the second throttling device (72), the third throttling device (73), the fourth throttling device (74) and the fifth throttling device (75), and the first control valve (51), the second control valve (52), the third control valve (53) and the fourth control valve (54).

10. The control method of a multi-split air conditioning system as set forth in claim 9, wherein:

when refrigeration is required, opening the first throttling device (71), and simultaneously controlling the first four-way valve (41) to enable the first end (D1) to be communicated with the second end (C1) and the third end (E1) to be communicated with the fourth end (S1); controlling the second four-way valve (42) such that the fifth end (D2) communicates with the sixth end (C2) and the seventh end (E2) communicates with the eighth end (S2).

11. The control method of a multi-split air conditioning system as set forth in claim 9, wherein:

when heating is required, opening the first throttling device (71), and simultaneously controlling the first four-way valve (41) to enable the first end (D1) to be communicated with the third end (E1) and the second end (C1) to be communicated with the fourth end (S1); controlling the second four-way valve (42) such that the fifth end (D2) communicates with the seventh end (E2) and the sixth end (C2) communicates with the eighth end (S2).

12. A control method of a multi-split air conditioning system as set forth in any one of claims 9 to 11, wherein:

when thermostatic dehumidification is required, the fourth throttling means (74) and/or the fifth throttling means (75) are opened, while the first four-way valve (41) is controlled so that the first end (D1) communicates with the second end (C1) and the third end (E1) communicates with the fourth end (S1).

13. The control method of a multi-split air conditioning system as set forth in claim 9, wherein:

when the floor heating is needed, the third throttling device (73) is opened, and the third control valve (53) is controlled to be opened and/or the fourth control valve (54) is controlled to be opened at the same time.

14. The control method of a multi-split air conditioning system as set forth in claim 13, wherein:

when the heating demand of the indoor unit is less than a preset value, controlling the first four-way valve (41) to enable the first end (D1) to be communicated with the third end (E1) and the second end (C1) to be communicated with the fourth end (S1), controlling the second four-way valve (42) to enable the fifth end (D2) to be communicated with the seventh end (E2) and the sixth end (C2) to be communicated with the eighth end (S2), and controlling the third control valve (53) to be opened and the fourth control valve (54) to be opened simultaneously;

when the heating demand of the indoor unit is more than a preset value, the first four-way valve (41) is controlled to enable the first end (D1) to be communicated with the third end (E1) and the second end (C1) to be communicated with the fourth end (S1), the second four-way valve (42) is controlled to enable the fifth end (D2) to be communicated with the seventh end (E2) and the sixth end (C2) to be communicated with the eighth end (S2), the third control valve (53) is controlled to be opened, and the fourth control valve (54) is controlled to be closed.

15. The control method of a multi-split air conditioning system as set forth in claim 9, wherein:

when heat accumulation is required, the second throttling device (72) is opened, and the first control valve (51) is controlled to be opened and/or the second control valve (52) is controlled to be opened.

16. The control method of a multi-split air conditioning system as set forth in claim 15, wherein:

when the heating demand of the indoor unit is less than a preset value, controlling the first four-way valve (41) to enable the first end (D1) to be communicated with the third end (E1) and the second end (C1) to be communicated with the fourth end (S1), controlling the second four-way valve (42) to enable the fifth end (D2) to be communicated with the seventh end (E2) and the sixth end (C2) to be communicated with the eighth end (S2), and controlling the first control valve (51) to be opened and the second control valve (52) to be opened simultaneously;

when the heating demand of the indoor unit is more than a preset value, controlling the first four-way valve (41) to enable the first end (D1) to be communicated with the third end (E1) and the second end (C1) to be communicated with the fourth end (S1), controlling the second four-way valve (42) to enable the fifth end (D2) to be communicated with the seventh end (E2) and the sixth end (C2) to be communicated with the eighth end (S2), and controlling the first control valve (51) to be opened and the second control valve (52) to be closed simultaneously.

17. The control method of a multi-split air conditioning system as set forth in claim 9, wherein:

when heat accumulation defrosting is required, the second throttling device (72) is opened, the first four-way valve (41) is controlled to enable the first end (D1) to be communicated with the second end (C1), the third end (E1) to be communicated with the fourth end (S1), the second four-way valve (42) enables the fifth end (D2) to be communicated with the sixth end (C2), and the seventh end (E2) to be communicated with the eighth end (S2);

controlling the first control valve (51) to open while controlling the second control valve (52) to close.

Technical Field

The disclosure relates to the technical field of multi-split air conditioners, in particular to a multi-split air conditioner system and a control method thereof.

Background

China is wide in breadth and different in climate characteristics, so that the functional requirements of consumers in different regions on air-conditioning products are different. For example, the southern area focuses on air conditioning and refrigeration functions; the northern air conditioning and cooling function is not much concerned, and mainly focuses on the heating and floor heating functions of an air conditioner; in the season of plum rain in Yangtze river basin, the requirement on the constant-temperature dehumidification function of the air conditioner is high; the solar energy resource is abundant in the northwest region, and the photovoltaic air conditioning system is the optimal use scheme. In order to meet the functional requirements of consumers, if all the functions are designed in an integrated manner, the system is complex and the cost is high.

At present, no air conditioning system can collect an air conditioning module, a floor heating module, a domestic hot water module, a constant-temperature dehumidification module, a heat storage defrosting module and a photovoltaic module in the market, and meanwhile, the application of constant-temperature dehumidification, heat storage defrosting, air conditioning requirements, floor heating requirements, domestic hot water requirements and photovoltaic is realized.

Patent number CN 210832379U discloses an air conditioning system who collects refrigeration, heat and warm up function in an organic whole, and this kind of system can realize refrigeration, heat, the function of constant temperature dehumidification and warm up, but can't solve the demand of making hot water, and the heat accumulation defrosting and the photovoltaic function also can't be realized.

Patent No. CN104296415A discloses a system that can freely match the demand of air conditioning system and hot water according to the demand of user, but the system can not realize other functions.

Because the modularized full-function multi-split air conditioner in the prior art cannot simultaneously realize the technical problems of constant-temperature dehumidification, heat storage and defrosting, refrigeration requirements, heating requirements, floor heating requirements and the like, the multi-split air conditioner system and the control method thereof are researched and designed in the disclosure.

BRIEF SUMMARY OF THE PRESENT DISCLOSURE

Therefore, the technical problem to be solved by the present disclosure is to overcome the defect that a multi-split air conditioning system in the prior art cannot simultaneously realize constant temperature dehumidification, heat storage and defrosting, refrigeration requirements, heating requirements and floor heating requirements, thereby providing a multi-split air conditioning system and a control method thereof.

In order to solve the above problems, the present disclosure provides a multi-split air conditioning system, which includes:

the air conditioner comprises a compressor, an outdoor heat exchanger, a first air side pipe, a second air side pipe and a liquid side pipe, wherein the first air side pipe, the second air side pipe and the liquid side pipe are respectively communicated between the indoor side and the outdoor side, and the first air side pipe is communicated with the exhaust end of the compressor; (ii) a

The indoor unit is connected and arranged between the second air side pipe and the liquid side pipe;

the heat storage module is connected and arranged between at least two of the first air side pipe, the second air side pipe and the liquid side pipe through a heat storage converter;

the constant-temperature dehumidification device comprises a first air side pipe, a second air side pipe, a liquid side pipe and at least one constant-temperature dehumidification inner machine, wherein the first air side pipe and the liquid side pipe are connected with each other through a pipeline;

the floor heating module is connected and arranged between at least two of the first air side pipe, the second air side pipe and the liquid side pipe through a floor heating converter.

In some embodiments, the indoor unit includes an indoor heat exchanger and an indoor unit duct on which the indoor heat exchanger and the first throttling device are disposed.

In some embodiments, the system further comprises a second pipeline, a third pipeline and a fourth pipeline, wherein one end of the second pipeline is communicated to the liquid side pipe, the other end of the second pipeline is communicated to the heat storage module, one end of the third pipeline is communicated to the second gas side pipe, the other end of the third pipeline is communicated to the heat storage module, and one end of the fourth pipeline is communicated to the first gas side pipe, and the other end of the fourth pipeline is communicated to the heat storage module;

the heat storage converter includes a second throttle device provided on the second line, a first control valve provided on the third line, and a second control valve provided on the fourth line.

In some embodiments, the floor heating system further comprises a fifth pipeline, a sixth pipeline and a seventh pipeline, wherein one end of the fifth pipeline is communicated to the liquid side pipe, the other end of the fifth pipeline is communicated to the floor heating module, one end of the sixth pipeline is communicated to the second gas side pipe, the other end of the sixth pipeline is communicated to the floor heating module, one end of the seventh pipeline is communicated to the first gas side pipe, and the other end of the seventh pipeline is communicated to the floor heating module;

the floor heating converter comprises a third throttling device arranged on the fifth pipeline, a third control valve arranged on the sixth pipeline and a fourth control valve arranged on the seventh pipeline.

In some embodiments, the floor heating module comprises a capillary tube structure, and at least two of the first air side tube, the second air side tube and the liquid side tube are communicated with each other, and a refrigerant can flow through the capillary tube to exchange heat for floor heating.

In some embodiments, the constant-temperature dehumidification inner machine comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is arranged on an eighth pipeline, one end of the eighth pipeline is communicated to the second gas-side pipe, the other end of the eighth pipeline is communicated to the liquid-side pipe, the second heat exchanger is arranged on a ninth pipeline, one end of the ninth pipeline is communicated to the first gas-side pipe, and the other end of the ninth pipeline is communicated to the liquid-side pipe.

In some embodiments, a fourth throttling device is further disposed on the eighth pipeline, and a fifth throttling device is further disposed on the ninth pipeline.

In some embodiments, the compressor further comprises a first four-way valve and a second four-way valve, wherein a first end of the first four-way valve is communicated with a fifth end of the second four-way valve and communicated with a discharge end of the compressor;

a sixth end of the second four-way valve is communicated with the outdoor heat exchanger, and the other end of the outdoor heat exchanger can be communicated with the first gas side pipe;

the third end of the first four-way valve is communicated with the second gas side pipe;

and the second end and the fourth end of the first four-way valve are communicated with the seventh end and the eighth end of the second four-way valve and communicated to the suction end of the compressor together.

The present disclosure also provides a control method of a multi-split air conditioning system as in any one of the above, which, when a first four-way valve, the second four-way valve, a first and second throttling device, a third and fourth throttling device, a fifth throttling device, and a first, second, and third and fourth control valves are simultaneously included, implements mode control of at least one of cooling, heating, heat storage, defrosting, and dehumidifying a room by controlling at least one of the first four-way valve, the second four-way valve, the first and second throttling devices, the third and fourth throttling device, the fifth throttling device, and the first, second, and third and fourth control valves.

In some embodiments, when refrigeration is required, the first throttling device is turned on, and the first four-way valve is controlled to enable the first end to be communicated with the second end and the third end to be communicated with the fourth end; controlling the second four-way valve such that the fifth end is in communication with the sixth end and the seventh end is in communication with the eighth end.

In some embodiments, when heating is required, the first throttling device is turned on, and the first four-way valve is controlled to enable the first end to be communicated with the third end and the second end to be communicated with the fourth end; controlling the second four-way valve such that the fifth end is in communication with the seventh end and the sixth end is in communication with the eighth end.

In some embodiments, when thermostatic dehumidification is required, the fourth throttling device and/or the fifth throttling device is opened, and the first four-way valve is controlled to enable the first end to be communicated with the second end and the third end to be communicated with the fourth end.

In some embodiments, when the floor heating is required, the third throttling device is opened, and the third control valve is controlled to be opened and/or the fourth control valve is controlled to be opened at the same time.

In some embodiments, when the heating demand of the indoor unit is less than a preset value, the floor heating control is performed as follows: controlling the first four-way valve to enable the first end to be communicated with the third end and the second end to be communicated with the fourth end, controlling the second four-way valve to enable the fifth end to be communicated with the seventh end and the sixth end to be communicated with the eighth end, and controlling the third control valve to be opened and simultaneously controlling the fourth control valve to be opened;

when the heating demand of the indoor unit is more than a preset value, floor heating control is performed as follows: and controlling the first four-way valve to enable the first end to be communicated with the third end and the second end to be communicated with the fourth end, controlling the second four-way valve to enable the fifth end to be communicated with the seventh end and the sixth end to be communicated with the eighth end, controlling the third control valve to be opened, and simultaneously controlling the fourth control valve to be closed.

In some embodiments, when heat storage is required, the second throttling device is opened while the first control valve is controlled to be opened and/or the second control valve is controlled to be opened.

In some embodiments, when the heating demand of the indoor unit is less than a preset value, the heat storage control is performed as follows: controlling the first four-way valve to enable the first end to be communicated with the third end and the second end to be communicated with the fourth end, controlling the second four-way valve to enable the fifth end to be communicated with the seventh end and the sixth end to be communicated with the eighth end, and controlling the first control valve to be opened and simultaneously controlling the second control valve to be opened;

when the heating demand of the indoor unit is more than a preset value, the heat storage control is carried out as follows: and controlling the first four-way valve to enable the first end to be communicated with the third end and the second end to be communicated with the fourth end, controlling the second four-way valve to enable the fifth end to be communicated with the seventh end and the sixth end to be communicated with the eighth end, controlling the first control valve to be opened, and simultaneously controlling the second control valve to be closed.

In some embodiments, when heat accumulation and defrosting are required, the second throttling device is opened, the first four-way valve is controlled to enable the first end to be communicated with the second end and the third end to be communicated with the fourth end, and the second four-way valve is controlled to enable the fifth end to be communicated with the sixth end and the seventh end to be communicated with the eighth end;

and controlling the first control valve to be opened and controlling the second control valve to be closed at the same time.

The multi-split air conditioning system and the control method thereof have the following beneficial effects:

the multi-split air conditioning system comprises a compressor, an outdoor heat exchanger, a subcooler, a common indoor unit, a constant-temperature dehumidification module, a heat storage module and a floor heating module, one set of system can simultaneously achieve the application effects of constant-temperature dehumidification, heat storage defrosting, air conditioning requirements and floor heating requirements, different actual requirements of users are met, each module can be selected to be connected into the system or not according to actual requirements, and whether the modules are connected into the system or not can not generate any influence on other connected functional modules in the system. The modularized full-function air conditioning system can meet the requirements of users in different regions, simultaneously does not need to install multiple sets of systems simultaneously, can carry out multiple functions and can be freely combined and matched. The system can save the maximum cost for the user on the premise of meeting the requirements of the user, and is convenient and flexible to install and comfortable to use. This openly simultaneously according to user's demand, can freely arrange specific interior machine and module, realize functions such as constant temperature dehumidification, heat accumulation defrosting and ground heating simultaneously. The refrigerant pipeline entering the floor heating module can be effectively controlled through the floor heating converter, so that the heating load of the floor heating module can be controlled according to the demand of the floor heating or according to the indoor heating demand; the refrigerant pipeline entering the heat storage module can be effectively controlled through the heat storage converter, so that the heat storage quantity can be controlled according to the heat storage requirement quantity or the indoor heating requirement quantity. And through setting up the heat exchange assembly of module for heating up to the structure of capillary, can directly with refrigerant pipeline intercommunication and through the refrigerant heating up in the capillary, can improve heat exchange efficiency relatively for the hot-water heating, improve indoor heating effect, the comfort level increases.

Drawings

Fig. 1 is a system configuration diagram of a multi-split air conditioner of the present disclosure.

The reference numerals are represented as:

1. a compressor; 1a, an exhaust end; 1b, a suction end; 2. an outdoor heat exchanger; 31. a first gas-side tube; 32. a second gas-side tube; 33. a liquid side pipe; 41. a first four-way valve; 42. a second four-way valve; d1, first end; c1, second end; e1, third end; s1, a fourth end; d2, fifth end; c2, sixth end; e2, seventh end; s2, an eighth end; 51. a first control valve; 52. a second control valve; 53. a third control valve; 54. a fourth control valve; 61. an indoor unit; 611. an indoor heat exchanger; 62. a heat storage module; 621. a heat storage converter; 63. a constant-temperature dehumidification inner machine; 631. a first heat exchanger; 632. a second heat exchanger; 71. a first throttling device; 72. a second throttling device; 73. a third throttling means; 74. a fourth throttling device; 75. a fifth throttling device; 9. a floor heating module; 91. a floor heating converter; 151. a first large valve; 152. a second large valve; 153. a small valve; 101. indoor unit pipelines; 102. a second pipeline; 103. a third pipeline; 104. a fourth pipeline; 105. a fifth pipeline; 106. a sixth pipeline; 107. a seventh pipeline; 108. an eighth pipeline; 109. a ninth conduit; 13. and a subcooler.

Detailed Description

As shown in fig. 1, the present disclosure provides a multi-split air conditioning system, which includes:

the air conditioner comprises a compressor 1, an outdoor heat exchanger 2, a first air side pipe 31, a second air side pipe 32 and a liquid side pipe 33, wherein the first air side pipe 31, the second air side pipe 32 and the liquid side pipe 33 are respectively communicated between the indoor side and the outdoor side, and the first air side pipe 31 is communicated with a discharge end 1a of the compressor 1; (ii) a

The indoor unit 61 is connected between the second air side pipe 32 and the liquid side pipe 33;

the heat storage device also comprises at least one heat storage module 62, wherein the heat storage module 62 is connected and arranged between at least two of the first air side pipe 31, the second air side pipe 32 and the liquid side pipe 33 through a heat storage converter 621;

the constant-temperature dehumidification inner machine 63 is arranged between the first gas-side pipe 31 and the liquid-side pipe 33, and/or the constant-temperature dehumidification inner machine 63 is arranged between the second gas-side pipe 32 and the liquid-side pipe 33;

still include at least one warm up module 9, warm up module 9 and connect through warm up converter 91 and set up first gas side pipe 31 second gas side pipe 32 with between two at least in the liquid side pipe 33.

The multi-split air conditioning system comprises a compressor, an outdoor heat exchanger, a subcooler, a common indoor unit, a constant-temperature dehumidification module, a heat storage module and a floor heating module, one set of system can simultaneously achieve the application effects of constant-temperature dehumidification, heat storage defrosting, air conditioning requirements and floor heating requirements, different actual requirements of users are met, each module can be selected to be connected into the system or not according to actual requirements, and whether the modules are connected into the system or not can not generate any influence on other connected functional modules in the system. The modularized full-function air conditioning system can meet the requirements of users in different regions, simultaneously does not need to install multiple sets of systems simultaneously, can carry out multiple functions and can be freely combined and matched. The system can save the maximum cost for the user on the premise of meeting the requirements of the user, and is convenient and flexible to install and comfortable to use. This openly simultaneously according to user's demand, can freely arrange specific interior machine and module, realize functions such as constant temperature dehumidification, heat accumulation defrosting and ground heating simultaneously. The refrigerant pipeline entering the floor heating module can be effectively controlled through the floor heating converter, so that the heating load of the floor heating module can be controlled according to the demand of the floor heating or according to the indoor heating demand; the refrigerant pipeline entering the heat storage module can be effectively controlled through the heat storage converter, so that the heat storage quantity can be controlled according to the heat storage requirement quantity or the indoor heating requirement quantity.

1. Common refrigerating and heating functional module

In some embodiments, the indoor unit 61 includes an indoor heat exchanger 611 and an indoor unit pipe 101, and the indoor heat exchanger 611 and the first throttling device 71 are disposed on the indoor unit pipe 101.

After being discharged from the compressor, the high-temperature and high-pressure gas is changed into medium-pressure and low-temperature liquid through the oil separator, the second four-way valve 42 and the outdoor heat exchanger, enters the ordinary indoor unit through the small valve of the liquid side pipe, is throttled, is evaporated and absorbs heat at the indoor side, performs refrigeration of the indoor unit, flows into the vapor-liquid separator through the second large valve 152 and the first four-way valve 41, and returns to the compressor. When the first four-way valve 41 and the second four-way valve 42 are powered and switched, the ordinary internal machine performs internal machine heating.

2. Heat storage defrosting module

In some embodiments, a second pipeline 102, a third pipeline 103 and a fourth pipeline 104 are further included, the second pipeline 102 is connected to the liquid side pipe 33 at one end and the heat storage module 62 at the other end, the third pipeline 103 is connected to the second gas side pipe 32 at one end and the heat storage module 62 at the other end, and the fourth pipeline 104 is connected to the first gas side pipe 31 at one end and the heat storage module 62 at the other end;

the heat storage converter 621 includes the second throttle device 72 provided on the second pipe 102, the first control valve 51 provided on the third pipe 103, and the second control valve 52 provided on the fourth pipe 104.

This is the preferred structural style of heat accumulation module and heat accumulation converter part of this disclosure, can control its flow size that gets into the refrigerant in the heat accumulation module through the second throttling arrangement in the heat accumulation converter, can control whether the third pipeline opens or closes through first control valve, can control whether the fourth pipeline opens or closes through the second control valve, consequently can effectively be according to the size of heat accumulation demand, the size of indoor set heating demand or other factors come the selectivity control to be through two pipelines to heat accumulation module heat accumulation or through a pipeline to heat accumulation module heat accumulation to accurate control is with improvement heat accumulation ability or reduction heat accumulation.

The heat accumulation defrosting module is only used when the system is in heating operation. When the system is in a refrigerating mode or other modes of operation, the valve of the heat accumulation defrosting module is closed. When the system is in heating operation, the flow direction of a refrigerant in the system is the same as that of a common heating indoor unit, and the heat storage defrosting module is subjected to heat storage without influencing the heating effect of other indoor units by adjusting the opening degree of the electronic expansion valve in the heat storage defrosting module. When the outdoor unit needs defrosting operation, the valve of the common heating indoor unit is closed, the heat storage defrosting module is used for providing heat for defrosting, the defrosting does not take heat from the indoor space, and the indoor comfort is improved.

The heat and frost storage module can be selectively installed. If the master control of the air conditioning system detects that no heat storage defrosting module is connected into the system, executing common indoor defrosting during defrosting; when the heat storage defrosting module is detected to be connected, the system operates according to the set heat storage defrosting control logic, heat storage defrosting is executed during defrosting, and when the heat storage defrosting fails and defrosting cannot be completed, the system performs ordinary internal defrosting operation.

3. Floor heating module

In some embodiments, a fifth pipeline 105, a sixth pipeline 106 and a seventh pipeline 107 are further included, the fifth pipeline 105 is communicated with the liquid side pipe 33 at one end and the floor heating module 9 at the other end, the sixth pipeline 106 is communicated with the second gas side pipe 32 at one end and the floor heating module 9 at the other end, and the seventh pipeline 107 is communicated with the first gas side pipe 31 at one end and the floor heating module 9 at the other end;

the floor heating converter 91 comprises a third throttle device 73 arranged on the fifth line 105, a third control valve 53 arranged on the sixth line 106 and a fourth control valve 54 arranged on the seventh line 107.

This is this the preferred structural style of floor heating module and floor heating converter part of this disclosure, can control its flow size that gets into the refrigerant in the floor heating module through the second throttling arrangement in the floor heating converter, whether can control the third pipeline through first control valve and open or close, whether can control the fourth pipeline through the second control valve and open or close, consequently can be effectively according to the size of floor heating demand, the size of indoor set heating demand or other factors come the selectivity control to heat the floor heating module or heat through a pipeline to the floor heating module through two pipelines, with accurate control in order to improve the floor heating ability or reduce the floor heating volume.

In some embodiments, the floor heating module 9 includes a capillary tube structure, and is disposed between at least two of the first air side tube 31, the second air side tube 32 and the liquid side tube 33 in a communication manner, and a refrigerant can flow through the capillary tube to exchange heat and supply the floor heating.

And through setting up the heat exchange assembly of module for heating up to the structure of capillary, can directly with refrigerant pipeline intercommunication and through the refrigerant heating up in the capillary, can improve heat exchange efficiency relatively for the hot-water heating, improve indoor heating effect, the comfort level increases.

The operation of the floor heating module is the same as the principle of domestic hot water, and the detection access and implementation process is also the same.

4. Constant temperature dehumidification module

In some embodiments, the thermostatic dehumidifying inner machine 63 comprises a first heat exchanger 631 and a second heat exchanger 632, the first heat exchanger 631 is disposed on an eighth pipeline 108, one end of the eighth pipeline 108 is communicated to the second gas-side pipe 32, the other end is communicated to the liquid-side pipe 33, the second heat exchanger 632 is disposed on a ninth pipeline 109, and one end of the ninth pipeline 109 is communicated to the first gas-side pipe 31, and the other end is communicated to the liquid-side pipe 33.

After being discharged from the compressor, the high-temperature and high-pressure gas passes through the oil separator and is divided into two paths before entering the four-way valve: the first path passes through the second four-way valve 42 and the outdoor heat exchanger, becomes a low-pressure and medium-pressure liquid, passes through the small valve of the liquid side pipe, enters the constant temperature dehumidification module, is throttled by the fourth throttling device 74, evaporates and absorbs heat in the first heat exchanger 631, and performs refrigeration of the first heat exchanger 631. The second path directly enters the constant temperature dehumidification module through the first large valve 151 of the gas side pipe (high pressure), is condensed and releases heat in the second heat exchanger 632, passes through the fifth throttling device 75, then is merged with the first path of refrigerant entering the fourth throttling device 74, and is evaporated and absorbs heat in the first heat exchanger 631.

The two paths are merged into one path, and then flow into the vapor-liquid separator through the second large valve 152 and the first four-way valve 41, and then return to the compressor. Due to the common condensation dehumidification system, the temperature of the air can be reduced simultaneously when dehumidification is carried out. The lower air-out temperature reduces the travelling comfort that the user used. When passing through the constant temperature dehumidification module, the high temperature (medium temperature) and high humidity air is firstly dehumidified and cooled at the first heat exchanger 631, and then is heated at the second heat exchanger 632, so that the outlet air temperature and humidity can be always kept in a comfortable range, and the use experience of a user is improved.

When the constant temperature dehumidification module needs to heat, the first four-way valve 41 and the second four-way valve 42 are powered to change directions, the flow direction of the refrigerant in the first heat exchanger 631 is consistent with that of the ordinary refrigerating and heating indoor unit, the refrigerant condensed and released in the second heat exchanger 632 is converged after being condensed and released in the first heat exchanger 631, and then the refrigerant returns to the outdoor heat exchanger through the liquid side pipe to be evaporated and then returns to the compressor. Compared with the common indoor heating, the constant-temperature dehumidification module has better heating effect because the number of the heat exchangers is two.

When the system detects that the constant temperature dehumidification module is accessed, the air conditioning system main control executes the constant temperature dehumidification function according to the mode requirement set by the user. If the system does not access the module, the system does not have the function, and the user can not set the function. Other functions accessed in the system are not influenced, and the other functions can be normally realized.

In the modularized full-function air conditioning system, the above 4 modules can be freely selected and matched to realize different use functions.

In some embodiments, a first four-way valve 41 and a second four-way valve 42 are further included, wherein a first end D1 of the first four-way valve 41 is communicated with a fifth end D2 of the second four-way valve 42 and is communicated to the exhaust end 1a of the compressor 1 together;

a sixth end C2 of the second four-way valve 42 is communicated with the outdoor heat exchanger 2, and the other end of the outdoor heat exchanger 2 can be communicated with the first gas-side pipe 31;

the third end E1 of the first four-way valve 41 is communicated with the second gas side pipe 32;

the second end C1 and the fourth end S1 of the first four-way valve 41 are communicated with the seventh end E2 and the eighth end S2 of the second four-way valve 42 and are communicated with the suction end 1b of the compressor 1.

In some embodiments, when a first control valve 51 and a second control valve 52 are included, at least one of the first control valve 51 and the second control valve 52 is a solenoid valve; when the third control valve 53 and the fourth control valve 54 are included, at least one of the third control valve 53 and the fourth control valve 54 is a solenoid valve.

The present disclosure also provides a control method of a multi-split air conditioning system as set forth in any of the above, which, when simultaneously including the first four-way valve 41, the second four-way valve 42, the first and second throttling devices 71 and 72, the third and fourth throttling devices 73 and 74, the fifth throttling device 75, and the first, second, third and fourth control valves 51, 52, 53 and 54, implements mode control of at least one of cooling, heating, heat storage, defrosting and dehumidifying of an indoor space by controlling the first four-way valve 41, the second four-way valve 42, the first and second throttling devices 71 and 72, the third throttling device 73, the fourth throttling device 74 and the fifth throttling device 75, and the first, second, third and fourth control valves 51, 52, 53 and 54.

The invention researches and designs a modularized full-function multi-split air conditioner system, integrates refrigeration, heating, dehumidification, floor heating and heat storage defrosting, improves the use comfort of customers and reduces the whole installation space.

The system comprises a compressor, two four-way valves, an outdoor heat exchanger, an outdoor electronic expansion valve, a subcooler electronic expansion valve, a plurality of common indoor units, a dehumidification indoor unit, a floor heating converter, a capillary network, a heat storage converter, a heat storage module, and electronic expansion valves and gas-liquid separators which correspond to the indoor units. When the air conditioner operates in different modes, the refrigerant flows as follows:

refrigerating an internal machine: compressor-second four-way valve 42-outdoor heat exchanger-outdoor DPF (electronic expansion valve) -subcooler-liquid side pipe-indoor DPF-indoor machine-first four-way valve 41-gas separation-press.

In some embodiments, when refrigeration is required, the first throttling device 71 is opened, and the first four-way valve 41 is controlled such that the first end D1 is communicated with the second end C1 and the third end E1 is communicated with the fourth end S1; the second four-way valve 42 is controlled such that the fifth end D2 communicates with the sixth end C2 and the seventh end E2 communicates with the eighth end S2.

In some embodiments, when heating is required, the first throttling device 71 is turned on, and the first four-way valve 41 is controlled such that the first end D1 is communicated with the third end E1 and the second end C1 is communicated with the fourth end S1; the second four-way valve 42 is controlled such that the fifth end D2 communicates with the seventh end E2 and the sixth end C2 communicates with the eighth end S2.

1. Common refrigerating and heating functional module

After being discharged from the compressor, the high-temperature and high-pressure gas is changed into medium-pressure and low-temperature liquid through the oil separator, the second four-way valve 42 and the outdoor heat exchanger, enters the ordinary indoor unit through the small valve of the liquid side pipe, is throttled, is evaporated and absorbs heat at the indoor side, performs refrigeration of the indoor unit, flows into the vapor-liquid separator through the second large valve 152 and the first four-way valve 41, and returns to the compressor. When the first four-way valve 41 and the second four-way valve 42 are powered and switched, the ordinary internal machine performs internal machine heating.

In some embodiments, when thermostatic dehumidification is desired, the fourth throttle 74 and/or the fifth throttle 75 are opened while the first four-way valve 41 is controlled such that the first end D1 communicates with the second end C1 and the third end E1 communicates with the fourth end S1.

2. Constant temperature dehumidification module

After being discharged from the compressor, the high-temperature and high-pressure gas passes through the oil separator and is divided into two paths before entering the four-way valve: the first path passes through the second four-way valve 42 and the outdoor heat exchanger, becomes a low-pressure and medium-pressure liquid, passes through the small valve of the liquid side pipe, enters the constant temperature dehumidification module, is throttled by the fourth throttling device 74, evaporates and absorbs heat in the first heat exchanger 631, and performs refrigeration of the first heat exchanger 631. The second path directly enters the constant temperature dehumidification module through the first large valve 151 of the gas side pipe (high pressure), is condensed and releases heat in the second heat exchanger 632, passes through the fifth throttling device 75, then is merged with the first path of refrigerant entering the fourth throttling device 74, and is evaporated and absorbs heat in the first heat exchanger 631.

The two paths are merged into one path, and then flow into the vapor-liquid separator through the second large valve 152 and the first four-way valve 41, and then return to the compressor. Due to the common condensation dehumidification system, the temperature of the air can be reduced simultaneously when dehumidification is carried out. The lower air-out temperature reduces the travelling comfort that the user used. When passing through the constant temperature dehumidification module, the high temperature (medium temperature) and high humidity air is firstly dehumidified and cooled at the first heat exchanger 631, and then is heated at the second heat exchanger 632, so that the outlet air temperature and humidity can be always kept in a comfortable range, and the use experience of a user is improved.

When the constant temperature dehumidification module needs to heat, the first four-way valve 41 and the second four-way valve 42 are powered to change directions, the flow direction of the refrigerant in the first heat exchanger 631 is consistent with that of the ordinary refrigerating and heating indoor unit, the refrigerant condensed and released in the second heat exchanger 632 is converged after being condensed and released in the first heat exchanger 631, and then the refrigerant returns to the outdoor heat exchanger through the liquid side pipe to be evaporated and then returns to the compressor. Compared with the common indoor heating, the constant-temperature dehumidification module has better heating effect because the number of the heat exchangers is two.

When the system detects that the constant temperature dehumidification module is accessed, the air conditioning system main control executes the constant temperature dehumidification function according to the mode requirement set by the user. If the system does not access the module, the system does not have the function, and the user can not set the function. Other functions accessed in the system are not influenced, and the other functions can be normally realized.

Indoor unit refrigeration and three-pipe dehumidification: two ways are simultaneously carried out

Compressor-second four-way valve 42-outdoor heat exchanger-outdoor DPF (electronic expansion valve) -liquid side pipe-indoor DPF, dehumidification air conditioner EXV 1-indoor unit, dehumidification module-gas side pipe (low pressure) -four-way valve A-gas-separating-pressing machine.

Compressor-gas side pipe (high pressure) -dehumidification module-dehumidification EXV 2-inner machine DPF, dehumidification air conditioner EXV 1-dehumidification air conditioner, inner machine-gas side pipe (low pressure) -first four-way valve 41-gas separation-press machine.

3. Floor heating module

In some embodiments, when floor heating is required, the third throttling device 73 is opened, and at the same time the third control valve 53 is controlled to be opened and/or the fourth control valve 54 is controlled to be opened.

In some embodiments, when the heating demand of the indoor unit is less than a preset value, the first four-way valve 41 is controlled such that the first end D1 is communicated with the third end E1, the second end C1 is communicated with the fourth end S1, the second four-way valve 42 is controlled such that the fifth end D2 is communicated with the seventh end E2, the sixth end C2 is communicated with the eighth end S2, and the third control valve 53 is controlled to be opened while the fourth control valve 54 is controlled to be opened;

when the heating demand of the indoor unit is greater than a preset value, the first four-way valve 41 is controlled to enable the first end D1 to be communicated with the third end E1 and the second end C1 to be communicated with the fourth end S1, the second four-way valve 42 is controlled to enable the fifth end D2 to be communicated with the seventh end E2 and the sixth end C2 to be communicated with the eighth end S2, the third control valve 53 is controlled to be opened, and the fourth control valve 54 is controlled to be closed.

The capillary network floor heating module is only available during heating operation. When the unit operates in a refrigerating mode, the third control valve 53 and the sixth throttling device 76 are closed, and the fact that refrigerants are not accumulated in the capillary network floor heating system can be guaranteed. When the system is in heating operation, floor heating and air conditioning heating can be selected. If the capillary network floor heating system is used, the fourth control valve 54 is opened, the high-temperature and high-pressure refrigerant flows into the capillary tube to release heat, is throttled by the third throttling device 73, is evaporated and absorbs heat by the small valve to the outer machine, and then returns to the compressor.

Floor heating: different flow directions of the refrigerant can be controlled according to the heating requirement of the whole machine.

Heating demand is small (the floor heating can use larger heat at the moment): floor heating converter allowing two paths to simultaneously flow into

The compressor, the first four-way valve 41, the gas side pipe (high pressure), the floor heating converter, the fourth control valve 54, the capillary network, the floor heating converter DPF, the liquid pipe side, the subcooler, the outdoor DPF, the outdoor heat exchanger, the second four-way valve 42, the gas distribution compressor.

Compressor-first four-way valve 41-gas side pipe (low pressure) -floor heating converter-third control valve 53 open-capillary network-floor heating converter DPF-liquid pipe side-subcooler-outdoor DPF-outdoor heat exchanger-second four-way valve 42-gas separation-compressor.

When the heating requirement is large (the floor heating can use smaller heat at the moment):

compressor-first four-way valve 41-gas side pipe (low pressure) -floor heating converter (third control valve 53 is opened) -capillary network-floor heating converter DPF-liquid pipe side-subcooler-outdoor DPF-outdoor heat exchanger-second four-way valve 42-gas separation-compressor.

4. Heat storage defrosting module

In some embodiments, when heat storage is required, the second throttle device 72 is opened while the first control valve 51 is controlled to be opened and/or the second control valve 52 is controlled to be opened.

In some embodiments, when the heating demand of the indoor unit is less than a preset value, the first four-way valve 41 is controlled such that the first end D1 is communicated with the third end E1, the second end C1 is communicated with the fourth end S1, the second four-way valve 42 is controlled such that the fifth end D2 is communicated with the seventh end E2, and the sixth end C2 is communicated with the eighth end S2, and the first control valve 51 is controlled to be opened while the second control valve 52 is controlled to be opened;

when the heating demand of the indoor unit is greater than a preset value, the first four-way valve 41 is controlled to enable the first end D1 to be communicated with the third end E1 and the second end C1 to be communicated with the fourth end S1, the second four-way valve 42 is controlled to enable the fifth end D2 to be communicated with the seventh end E2 and the sixth end C2 to be communicated with the eighth end S2, the first control valve 51 is controlled to be opened, and the second control valve 52 is controlled to be closed.

In some embodiments, when thermal storage defrosting is required, the second throttling device 72 is opened, the first four-way valve 41 is controlled to communicate the first end D1 with the second end C1, the third end E1 with the fourth end S1, the second four-way valve 42 is controlled to communicate the fifth end D2 with the sixth end C2, and the seventh end E2 with the eighth end S2;

the first control valve 51 is controlled to open while the second control valve 52 is controlled to close.

The heat accumulation defrosting module is only used when the system is in heating operation. When the system is in a refrigerating mode or other modes of operation, the valve of the heat accumulation defrosting module is closed. When the system is in heating operation, the flow direction of a refrigerant in the system is the same as that of a common heating indoor unit, and the heat storage defrosting module is subjected to heat storage without influencing the heating effect of other indoor units by adjusting the opening degree of the electronic expansion valve in the heat storage defrosting module. When the outdoor unit needs defrosting operation, the valve of the common heating indoor unit is closed, the heat storage defrosting module is used for providing heat for defrosting, the defrosting does not take heat from the indoor space, and the indoor comfort is improved.

The heat and frost storage module can be selectively installed. If the master control of the air conditioning system detects that no heat storage defrosting module is connected into the system, executing common indoor defrosting during defrosting; when the heat storage defrosting module is detected to be connected, the system operates according to the set heat storage defrosting control logic, heat storage defrosting is executed during defrosting, and when the heat storage defrosting fails and defrosting cannot be completed, the system performs ordinary internal defrosting operation.

Heat storage: the whole machine is started as long as the whole machine has heating requirements. Different flow directions of the refrigerant can be controlled according to the heating requirement of the whole machine.

Small heating requirement (larger heat can be used for heat storage): two-way simultaneous flow heat storage module

Compressor-gas side pipe (high pressure) -heat storage converter-second control valve 52-heat storage module-electronic expansion valve-liquid pipe side-subcooler-outdoor DPF-outdoor heat exchanger-second four-way valve 42-gas separation-compressor.

Compressor-first four-way valve 41-gas side pipe (low pressure) -heat accumulation converter-first control valve 51-heat accumulation module-electronic expansion valve-liquid pipe side-subcooler-outdoor DPF-outdoor heat exchanger-second four-way valve 42-gas separation-compressor.

When the heating demand is large: only 1-way inflow heat storage module

Compressor-first four-way valve 41-gas side pipe (low pressure) -heat accumulation converter-first control valve 51-heat accumulation module-electronic expansion valve-liquid pipe side-subcooler-outdoor DPF-outdoor heat exchanger-second four-way valve 42-gas separation-compressor.

Heat storage and defrosting: when the unit has the defrosting requirement, the four-way valve is reversed to be in the refrigerating mode, and the refrigerant does not flow through the inner machine to absorb heat from the indoor space, but absorbs heat from the heat storage module.

Compressor-second four-way valve 42-outdoor heat exchanger-outdoor DPF (electronic expansion valve) -subcooler-liquid side tube-heat storage converter DPF 2-heat storage module-first control valve 51-first four-way valve 41-air separator-compressor.

In the modularized full-function air conditioning system, the above 4 modules can be freely selected and matched to realize different use functions.

1. The system can solve the problem that one set of system has the functions of air conditioner refrigeration, heating and ground heating, when the module is accessed, the main control of the system can automatically detect and execute according to the accessed module, when the system is not accessed into the module, the realization of other functions cannot be influenced, and other systems can be normally realized;

2. according to the user's demand, this is disclosed simultaneously, can freely match specific interior machine and module, realize the function of constant temperature dehumidification, heat accumulation defrosting.

The modularized full-function air conditioning system can meet the requirements of users in different regions, simultaneously does not need to install multiple sets of systems simultaneously, can carry out multiple functions and can be freely combined and matched. The system can save the maximum cost for the user on the premise of meeting the requirements of the user, and is convenient and flexible to install and comfortable to use.

The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure. The foregoing is only a preferred embodiment of the present disclosure, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present disclosure, and these modifications and variations should also be regarded as the protection scope of the present disclosure.