Multi-connected air conditioning system

Abstract

The application discloses a multi-connected air conditioner system, comprising: a compressor, provided with an exhaust port and a return air port; an outdoor heat exchanger; a heat exchange assembly, comprising: a first heat exchanger and a second heat exchanger; a domestic water heater, connected in parallel with the second heat exchanger; a floor heating system, connected in parallel with the second heat exchanger; a first electromagnetic valve, selectively connecting the exhaust port and the other end of the second heat exchanger; a second electromagnetic valve, selectively connecting the return air port and the other end of the second heat exchanger; a multi-way valve, selectively connecting the compressor and one end of the outdoor heat exchanger, and selectively connecting the other end of the compressor and the heat exchange assembly. The multi-connected air conditioner system can realize the hot water heating function of the domestic water heater while cooling or heating; the heat absorbed from the indoor is recycled and utilized to heat water when cooling; the heat exchange assembly realizes the non-cooling dehumidification function of the multi-connected air conditioner system; the functions of cooling, heating, domestic water heater, floor heating system and the like are integrated, and the economy is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a multi-split air conditioning system. Background Technology

[0002] Consumers need air conditioning to solve the problems of cold and heat in their daily lives. They also need hot water for washing and bathing, and underfloor heating systems for winter heating. In spring and summer and the transition season between summer and autumn, they face high humidity and low ambient temperature, and need to achieve dehumidification without cooling.

[0003] In related technologies, ordinary multi-split air conditioners, air source heat pump water heaters, and underfloor heating systems are actually multiple air conditioning systems that need to be installed separately and cannot be integrated together. This results in high investment costs and separate installation spaces. Furthermore, during the cooling period of multi-split air conditioners, the heat absorbed from the indoor environment is transferred to the outdoor environment through the refrigerant and directly discharged into the air, leading to energy waste. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a multi-split air conditioning system that can simultaneously provide cooling or heating and also provide hot water from a domestic water heater. It integrates cooling / heating functions with a domestic water heater, underfloor heating system, and other functions, reducing equipment costs, minimizing installation space, and significantly improving economic efficiency.

[0005] A multi-split air conditioning system according to an embodiment of the present invention includes: a compressor having an exhaust port and an exhaust port; an outdoor heat exchanger; and a heat exchange assembly including: a first heat exchanger and a second heat exchanger, one end of each of the first and second heat exchangers being connected to the outdoor heat exchanger; a domestic water heater connected between the compressor and the outdoor heat exchanger, the domestic water heater being connected in parallel with the second heat exchanger; a floor heating system connected between the compressor and the outdoor heat exchanger, the floor heating system being connected in parallel with the second heat exchanger; a first solenoid valve selectively connecting the exhaust port and the other end of the second heat exchanger; a second solenoid valve selectively connecting the exhaust port and the other end of the second heat exchanger; and a multi-way valve selectively connecting the compressor and one end of the outdoor heat exchanger, and selectively connecting the compressor and the other end of the heat exchange assembly.

[0006] According to embodiments of the present invention, the multi-split air conditioning system can simultaneously provide cooling or heating and also function as a domestic water heater for producing hot water. During cooling, it recovers heat absorbed from the room to heat water. At the same time, when humidity is high, the system can achieve dehumidification without cooling through heat exchange components. It integrates cooling and heating functions with domestic water heaters, underfloor heating systems, etc., reducing equipment costs, minimizing installation space, and greatly improving economic efficiency.

[0007] According to some embodiments of the present invention, the multi-port valve includes: a first valve port, a second valve port, a third valve port, and a fourth valve port; the first valve port is connected to the exhaust port, the second valve port is connected to the outdoor heat exchanger, the third valve port is connected to the return gas port, and the fourth valve port is connected to the other end of the first heat exchanger.

[0008] According to some embodiments of the present invention, the multi-split air conditioning system further includes: a third heat exchanger, one end of which is connected to the outdoor heat exchanger, and the other end of which is connected to the fourth valve port.

[0009] According to some embodiments of the present invention, the domestic water heater further includes: a third solenoid valve connected between the domestic water heater and the compressor; and / or,

[0010] The underfloor heating system further includes a fourth solenoid valve, which is connected between the underfloor heating system and the compressor.

[0011] According to some embodiments of the present invention, the multi-split air conditioning system further includes: a high-low pressure valve, the high-low pressure valve being connected between the second heat exchanger and the first solenoid valve and the second solenoid valve.

[0012] According to some embodiments of the present invention, the multi-split air conditioning system further includes: a gas valve, the gas valve connecting the compressor to the other end of the first heat exchanger and the other end of the third heat exchanger.

[0013] According to some embodiments of the present invention, the multi-split air conditioning system further includes: a liquid valve and a first throttling element, the liquid valve being connected between one end of the heat exchange assembly and one end of the third heat exchanger and the other end of the outdoor heat exchanger, and the first throttling element being connected between the liquid valve and the other end of the outdoor heat exchanger.

[0014] According to some embodiments of the present invention, the heat exchange assembly further includes: a second throttling element and a third throttling element, the second throttling element being connected between the liquid valve and the first heat exchanger, and the third throttling element being connected between the liquid valve and the second heat exchanger; and,

[0015] The multi-split air conditioning system further includes a fourth throttling element, which is connected between the liquid valve and the third heat exchanger.

[0016] According to some embodiments of the present invention, a domestic water heater includes: a water tank and a fifth throttling element, the fifth throttling element being connected between the liquid valve and the water tank;

[0017] Furthermore, the underfloor heating system includes a hot water module and a sixth throttling element, the sixth throttling element being connected between the liquid valve and the hot water module.

[0018] According to some embodiments of the present invention, the multi-split air conditioning system further includes: a liquid storage tank, one end of which is connected to the return gas port, and the other end of which is connected to the second solenoid valve and the third valve port.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of a multi-split air conditioning system according to an embodiment of the present invention;

[0022] Figure 2 This is a circuit diagram of a first mode of a multi-split air conditioning system according to an embodiment of the present invention;

[0023] Figure 3 This is a circuit diagram of the second mode of a multi-split air conditioning system according to an embodiment of the present invention;

[0024] Figure 4 This is a circuit diagram of the third mode of a multi-split air conditioning system according to an embodiment of the present invention;

[0025] Figure 5 This is a circuit diagram of the fourth mode of a multi-split air conditioning system according to an embodiment of the present invention;

[0026] Figure 6 This is a circuit diagram of the fifth mode of a multi-split air conditioning system according to an embodiment of the present invention;

[0027] Figure 7 This is a circuit diagram of the sixth mode of a multi-split air conditioning system according to an embodiment of the present invention;

[0028] Figure 8 This is a circuit diagram of the seventh mode of a multi-split air conditioning system according to an embodiment of the present invention;

[0029] Figure 9 This is a circuit diagram of the eighth mode of a multi-split air conditioning system according to an embodiment of the present invention;

[0030] Figure 10 This is a circuit diagram of the ninth mode of a multi-split air conditioning system according to an embodiment of the present invention.

[0031] Figure label:

[0032] 100. Multi-split air conditioning system;

[0033] 10. Compressor; 11. Exhaust port; 12. Return port;

[0034] 21. Outdoor heat exchanger; 22. First throttling element; 23. Liquid valve; 24. Fifth solenoid valve;

[0035] 30. Heat exchange assembly; 31. First heat exchanger; 32. Second heat exchanger; 33. Second throttling element; 34. Third throttling element; 35. High and low pressure valves; 36. Gas valve;

[0036] 41. Third heat exchanger; 42. Fourth throttling element;

[0037] 51. Domestic water heater; 52. Water tank; 53. Third solenoid valve; 54. Fifth throttling element; 55. Underfloor heating system; 56. Hot water module; 57. Fourth solenoid valve; 58. Sixth throttling element;

[0038] 60. Multi-way valve; 61. First solenoid valve; 62. Second solenoid valve. Detailed Implementation

[0039] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0040] The following is for reference. Figures 1-10 A multi-split air conditioning system according to an embodiment of the present invention is described.

[0041] Combination Figure 1 As shown, the multi-split air conditioning system 100 includes: a compressor 10, an outdoor heat exchanger 21, a heat exchange component 30, a domestic water heater 51, and a floor heating system 55.

[0042] The compressor 10 compresses the refrigerant, transforming low-pressure refrigerant into high-pressure refrigerant. The low-temperature, low-pressure refrigerant, after being compressed within the compressor 10, becomes a high-temperature, high-pressure gas and is discharged. This high-temperature, high-pressure gas exchanges heat with the outdoor air at the outdoor heat exchanger 21. The outdoor heat exchanger 21 is configured to exchange heat between the outdoor air and the refrigerant transported within it. For example, in the cooling mode of the multi-split air conditioning system 100, the outdoor heat exchanger 21 functions as a condenser, allowing the refrigerant compressed by the compressor 10 to dissipate heat to the outdoor air and condense. In the heating mode of the multi-split air conditioning system 100, the outdoor heat exchanger 21 functions as an evaporator, allowing the depressurized refrigerant to absorb heat from the outdoor air and evaporate.

[0043] The compressor 10 is equipped with an exhaust port 11 and a return port 12. High-temperature and high-pressure refrigerant is discharged from the exhaust port 11. When the multi-split air conditioning system 100 is in cooling mode, the outdoor heat exchanger 21 acts as a condenser. The high-temperature and high-pressure refrigerant flows back to the outdoor heat exchanger 21 and exchanges with the outdoor air, releasing a large amount of heat. The low-temperature refrigerant absorbs heat at the indoor heat exchanger to reduce the indoor temperature and achieve cooling. Finally, the low-temperature and low-pressure refrigerant returns to the compressor 10 from the return port 12, completing the circulation of refrigerant in the multi-split air conditioning system 100.

[0044] like Figure 1 and Figure 2 As shown, the heat exchange assembly 30 includes a first heat exchanger 31 and a second heat exchanger 32, one end of which is connected to the outdoor heat exchanger 21. That is, one end of the first heat exchanger 31 and one end of the second heat exchanger 32 are connected to the outdoor heat exchanger 21. The first heat exchanger 31 and the second heat exchanger 32 are located indoors. When the air conditioner is in cooling mode, the high-temperature, high-pressure refrigerant output by the compressor 10 exchanges heat with the outdoor air at the outdoor heat exchanger 21, releasing a large amount of heat and condensing the gaseous refrigerant, at which point the refrigerant becomes liquid. The liquid refrigerant then passes through the indoor heat exchanger, i.e., the first heat exchanger 31 or the second heat exchanger 32, absorbing a large amount of heat and vaporizing into gaseous refrigerant, eventually returning to the compressor 10, thus realizing the circulation of the refrigerant within the air conditioning system.

[0045] A domestic water heater 51 is connected between the compressor 10 and the outdoor heat exchanger 21, and is connected in parallel with the second heat exchanger 32. A floor heating system 55 is also connected between the compressor 10 and the outdoor heat exchanger 21, and is connected in parallel with the second heat exchanger 32. In other words, both the domestic water heater 51 and the floor heating system 55 are connected in parallel across the second heat exchanger 32. One end of both the domestic water heater 51 and the floor heating system 55 is connected to the outdoor heat exchanger 21, and the other end is connected to the compressor 10. Additionally, the other end of both the domestic water heater 51 and the floor heating system 55 is connected to the end where the first heat exchanger 31 connects to the compressor 10. When the second heat exchanger 32 is connected to the exhaust port 11 of the compressor 10, either the domestic water heater 51 or the floor heating system 55 can be connected to the exhaust port 11 of the compressor 10. High-temperature, high-pressure gaseous refrigerant flows through the domestic water heater 51 or the floor heating system 55, thereby providing hot water and floor heating.

[0046] The first solenoid valve 61 selectively connects the exhaust port 11 and the other end of the second heat exchanger 32. That is, when the first solenoid valve 61 is closed, the second heat exchanger 32 is not connected to the exhaust port 11 of the compressor 10. When the first solenoid valve 61 is open, one end of the first solenoid valve 61 is connected to the exhaust port 11 of the compressor 10, and the other end of the first solenoid valve 61 is connected to the second heat exchanger 32, so that the exhaust port 11 of the compressor 10 can be connected to the second heat exchanger 32, so that the high-temperature and high-pressure gaseous refrigerant releases heat at the second heat exchanger 32. At this time, the second heat exchanger 32 acts as a condenser.

[0047] The second solenoid valve 62 selectively connects to the return port 12 and the other end of the second heat exchanger 32. That is, when the second solenoid valve 62 is closed, the return port 12 is not connected to the other end of the second heat exchanger 32; when the second solenoid valve 62 is open, one end of the second solenoid valve 62 is connected to the return port 12 of the compressor 10, and the other end of the second solenoid valve 62 is connected to the other end of the second heat exchanger 32. That is, the return port 12 of the compressor 10 can be connected to the other end of the second heat exchanger 32. At this time, the second heat exchanger 32 acts as an evaporator. After the high-temperature and high-pressure refrigerant releases heat at the outdoor heat exchanger 21, it condenses into a low-temperature liquid refrigerant. The liquid refrigerant absorbs heat at the second heat exchanger 32 and vaporizes into a low-pressure gaseous refrigerant, which returns to the compressor 10 from the return port 12, realizing the circulation of the refrigerant.

[0048] The multi-way valve 60 selectively connects one end of the compressor 10 and the outdoor heat exchanger 21, and the multi-way valve 60 selectively connects the compressor 10 and the other end of the heat exchange assembly 30. Specifically, two of the ports of the multi-way valve 60 are connected to the exhaust port 11 and the return port 12 of the compressor 10, respectively. The other port is connected to the outdoor heat exchanger 21, and the third port is connected to the other end of the first heat exchanger 31. Thus, when the multi-way valve 60 connects the exhaust port 11 of the compressor 10 to the outdoor heat exchanger 21, the outdoor heat exchanger 21 acts as a condenser. Then, the multi-way valve 60 connects the first heat exchanger 31 to the return port 12 of the compressor 10, and the first heat exchanger 31 acts as an evaporator to cool the indoor environment. When the multi-way valve 60 connects the return port 12 of the compressor 10 to the outdoor heat exchanger 21, the outdoor heat exchanger 21 acts as an evaporator. When the multi-way valve 60 connects the first heat exchanger 31 to the exhaust port 11 of the compressor 10, the first heat exchanger 31 acts as a condenser to heat the outdoor environment.

[0049] Furthermore, the multi-split air conditioning system 100 also includes a third heat exchanger 41, one end of which is connected to the outdoor heat exchanger 21, and a multi-way valve 60 connecting the compressor 10 to the other end of the third heat exchanger 41. Specifically, when the outdoor heat exchanger 21 is connected to the exhaust port 11 of the compressor 10, and the return port 12 of the compressor 10 is connected to the other end of the third heat exchanger 41, the high-temperature and high-pressure gaseous refrigerant exchanges heat with the outdoor air at the outdoor heat exchanger 21, liquefying into liquid refrigerant. The liquid refrigerant flows to the third heat exchanger 41, where it exchanges heat with the indoor air, absorbing a large amount of heat, lowering the indoor temperature, and achieving cooling.

[0050] Alternatively, the exhaust port 11 of the compressor 10 is connected to the other end of the third heat exchanger 41, and the outdoor heat exchanger 21 is connected to the return port 12 of the compressor 10. The high-temperature and high-pressure gaseous refrigerant exchanges heat with the indoor air at the third heat exchanger 41, liquefies into liquid refrigerant, releases a large amount of heat, and raises the indoor temperature. The liquid refrigerant flows to the outdoor heat exchanger 21, exchanges heat with the outdoor air at the outdoor heat exchanger 21, absorbs a large amount of heat, vaporizes into gaseous refrigerant, and returns to the compressor 10, thereby realizing the heating function of the multi-split air conditioning system 100.

[0051] The following describes three of the operating modes of the multi-split air conditioning system 100.

[0052] according to Figure 2The first mode shown is the single cooling mode: at this time, the first solenoid valve 61 is closed, the exhaust port 11 of the compressor 10 is not connected to the other end of the second heat exchanger 32, the second solenoid valve 62 is open, the return port 12 of the compressor 10 is connected to the other end of the second heat exchanger 32, the multi-way valve 60 connects the outdoor heat exchanger 21 to the exhaust port 11 of the compressor 10, and the multi-way valve 60 also connects the first heat exchanger 31, the second heat exchanger 32 and the third heat exchanger 41 to the return port 12 of the compressor 10. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 exchanges heat with the outdoor air at the outdoor heat exchanger 21, releasing a large amount of heat. At this time, the outdoor heat exchanger 21 acts as a condenser, while the first heat exchanger 31, the second heat exchanger 32, and the third heat exchanger 41 all act as evaporators, realizing the condensation of the gaseous refrigerant, which then becomes liquid. The liquid refrigerant then passes through the indoor heat exchangers, where a portion flows to the first heat exchanger 31, another portion flows to the second heat exchanger 32, and yet another portion flows to the third heat exchanger 41. At these heat exchangers, the liquid refrigerant absorbs a large amount of heat, vaporizes into gaseous refrigerant, and finally returns to the compressor 10, thus achieving the cooling function of the multi-split air conditioning system 100.

[0053] according to Figure 3 The second mode shown is the cooling-dehumidifying-hot water production mode: At this time, the first solenoid valve 61 is open, connecting the exhaust port 11 of the compressor 10 with the other end of the second heat exchanger 32 and the other end of the domestic water heater 51. The second solenoid valve 62 is closed, and the other end of the second heat exchanger 32 is not connected to the return air port 12. The multi-way valve 60 connects the exhaust port 11 of the compressor 10 and the outdoor heat exchanger 21. The multi-way valve 60 also connects the return air port 12 of the compressor 10 with the other end of the first heat exchanger 31 and the other end of the third heat exchanger 41. A portion of the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 exchanges heat with the outdoor air at the outdoor heat exchanger 21, releasing a large amount of heat and liquefying into liquid refrigerant; the outdoor heat exchanger 21 then acts as a condenser. Another portion of the high-temperature, high-pressure gaseous refrigerant flows to the second heat exchanger 32, where it releases a large amount of heat and liquefies into liquid refrigerant; yet another portion of the high-temperature, high-pressure gaseous refrigerant flows to the domestic water heater 51, where it releases a large amount of heat to produce hot water and liquefies into liquid refrigerant.

[0054] Next, the liquid refrigerant from these three circuits merges and splits into two parts. One part flows to the first heat exchanger 31, where it absorbs a large amount of heat and vaporizes into gaseous refrigerant. Thus, the heat exchange component 30 can achieve dehumidification without cooling. The remaining part flows to the third heat exchanger 41, where it absorbs a large amount of heat and vaporizes into gaseous refrigerant. The third heat exchanger 41 can then perform a cooling function. Finally, the two parts of gaseous refrigerant merge and return to the return port 12 of the compressor 10. Thus, while cooling, dehumidification and hot water production are achieved simultaneously. Therefore, when cooling, the multi-split air conditioning system 100 uses the heat absorbed from the indoor unit to heat the domestic water heater 51, performing heat recovery instead of releasing heat to the outside, thus ensuring the supply of domestic hot water.

[0055] according to Figure 4 The third mode shown is the heating-hot water mode: when the indoor temperature is low in winter, hot water needs to be produced and the underfloor heating system 55 needs to be turned on. At this time, the first solenoid valve 61 is open, the second solenoid valve 62 is closed, connecting the exhaust port 11 of the compressor 10 to the other end of the second heat exchanger 32, the other end of the domestic water heater 51, and / or the other end of the underfloor heating system 55. With the second solenoid valve 62 closed, the other end of the second heat exchanger 32 is not connected to the return air port 12. The multi-way valve 60 connects the exhaust port 11 of the compressor 10 to the other end of the first heat exchanger 31 and the other end of the third heat exchanger 41, and also connects the return air port 12 of the compressor 10 to the outdoor heat exchanger 21. In this embodiment of the invention, the second solenoid valve 62 connects the exhaust port 11 of the compressor 10 to the other end of the second heat exchanger 32, the other end of the domestic water heater 51, and the other end of the underfloor heating system 55. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 exhaust port 11 is divided into two paths. One path flows through the first solenoid valve 61 and is divided into three parts, which flow to the second heat exchanger 32, the domestic water heater 51 and the underfloor heating system 55 respectively. A large amount of heat is released at the second heat exchanger 32, the domestic water heater 51 and the underfloor heating system 55 respectively, and the refrigerant is liquefied into liquid refrigerant. While heating, hot water and underfloor heating are supplied.

[0056] Another stream of refrigerant, via multi-way valve 60, is divided into two parts, flowing to the first heat exchanger 31 and the third heat exchanger 41 respectively. In each heat exchanger, a large amount of heat is released, liquefying into liquid refrigerant to provide heating. The five streams of liquid refrigerant then converge and flow to the outdoor heat exchanger 21, which acts as an evaporator. At the outdoor heat exchanger 21, the liquid refrigerant absorbs a large amount of heat, vaporizing into gaseous refrigerant, and finally returns to the compressor 10. Thus, the multi-split air conditioning system 100 provides both hot water and underfloor heating while simultaneously providing heating.

[0057] Therefore, the multi-split air conditioning system 100 can simultaneously provide cooling or heating while also functioning as a domestic water heater 51 for hot water production; during cooling, it recovers heat absorbed from the room to heat the water; and when humidity is high, the heat exchange components 30 enable the multi-split air conditioning system 100 to dehumidify without cooling. By integrating cooling, heating, domestic water heater 51, and underfloor heating system 55, it reduces equipment costs, minimizes installation space, and significantly improves economic efficiency. The domestic water heater 51, underfloor heating system 55, and heating can also operate independently, offering convenience and flexibility.

[0058] The multi-port valve 60 includes a first valve port, a second valve port, a third valve port, and a fourth valve port; the first valve port is connected to the exhaust port 11, the second valve port is connected to the outdoor heat exchanger 21, the third valve port is connected to the return gas port 12, the fourth valve port is connected to the other end of the first heat exchanger 31, and the fourth valve port is connected to the other end of the third heat exchanger 41.

[0059] Understandably, the first valve port, that is, Figures 1-10 Port A in the middle; the second valve port, that is, Figures 1-10 Port B in the middle; the third valve port, that is, Figures 1-10 Port B in the middle; the fourth valve port, that is, Figures 1-10 Port B in the middle.

[0060] The multi-split air conditioning system 100 also includes: a fifth solenoid valve 24, which selectively connects one end of the compressor 10 and the outdoor heat exchanger 21. That is, when the fifth solenoid valve 24 is closed, one end of the compressor 10 and the outdoor heat exchanger 21 are not connected; when the fifth solenoid valve 24 is open, one end of the fifth solenoid valve 24 is connected to the second valve port, and the other end of the fifth solenoid valve 24 is connected to one end of the outdoor heat exchanger 21. If the second valve port is connected to the first valve port, that is, the exhaust port 11 of the compressor 10 can be connected to one end of the outdoor heat exchanger 21, when the exhaust port 11 of the compressor 10 is connected to the outdoor heat exchanger 21, the outdoor heat exchanger 21 acts as a condenser. After the high-temperature and high-pressure refrigerant releases heat at the outdoor heat exchanger 21, it condenses into a low-temperature liquid refrigerant.

[0061] If the second valve port is connected to the third valve port, that is, the return port 12 of the compressor 10 is connected to one end of the outdoor heat exchanger 21, the outdoor heat exchanger 21 acts as an evaporator. The liquid refrigerant absorbs heat at the outdoor heat exchanger 21 and vaporizes into low-pressure gaseous refrigerant, which returns to the compressor 10 from the return port 12, thus realizing the circulation of refrigerant.

[0062] Reference Figure 2 and Figure 3As shown, when the multi-split air conditioning system 100 is in the first or second mode, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port. At this time, when the first valve port is connected to the second valve port, the exhaust port 11 of the compressor 10 is connected to the outdoor heat exchanger 21, which acts as a condenser. When the third valve port is connected to the fourth valve port, the return port 12 of the compressor 10 is connected to the other end of the first heat exchanger 31 and the third heat exchanger 41, which act as evaporators.

[0063] according to Figure 4 As shown, when the multi-split air conditioning system 100 is in the third mode, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port. At this time, when the first valve port is connected to the fourth valve port, the exhaust port 11 of the compressor 10 is connected to the other end of the first heat exchanger 31 and the third heat exchanger 41, which act as condensers. When the second valve port is connected to the third valve port, the return port 12 of the compressor 10 is connected to the outdoor heat exchanger 21, which acts as an evaporator.

[0064] Reference Figures 4-6 As shown, the domestic water heater 51 also includes a third solenoid valve 53, which is connected between the domestic water heater 51 and the compressor 10. Specifically, when the third solenoid valve 53 is closed, the domestic water heater 51 is not connected to the exhaust port 11 of the compressor 10, and the domestic water heater 51 does not participate in the operation of the multi-split air conditioning system 100. When the third solenoid valve 53 is open, the domestic water heater 51 is connected in parallel across the two ends of the second heat exchanger 32. Only when the first solenoid valve 61 is open is the second heat exchanger 32 connected to the exhaust port 11 of the compressor 10, at which time the domestic water heater 51 is also connected to the exhaust port 11 of the compressor 10, thus achieving hot water supply while cooling or heating.

[0065] like Figure 7 As shown, the underfloor heating system 55 also includes a fourth solenoid valve 57, which is connected between the underfloor heating system 55 and the compressor 10. Specifically, when the fourth solenoid valve 57 is closed, the underfloor heating system 55 is not connected to the exhaust port 11 of the compressor 10, and the underfloor heating system 55 does not participate in the operation of the multi-split air conditioning system 100. When the temperature is low, the fourth solenoid valve 57 is opened, and the underfloor heating system 55 is connected in parallel to both ends of the second heat exchanger 32. Only when the first solenoid valve 61 is opened is the second heat exchanger 32 connected to the exhaust port 11 of the compressor 10. At this time, the underfloor heating system 55 is also connected to the exhaust port 11 of the compressor 10, thus providing underfloor heating while providing heat.

[0066] according to Figure 5As shown, in the fourth mode of the multi-split air conditioning system 100, namely, the single heating mode, the third solenoid valve 53 and the fourth solenoid valve 57 are closed, the first solenoid valve 61 is open, and the second solenoid valve 62 is closed, connecting the exhaust port 11 of the compressor 10 to the other end of the second heat exchanger 32. With the second solenoid valve 62 closed, the other end of the second heat exchanger 32 is not connected to the return port 12. The multi-way valve 60 connects the exhaust port 11 of the compressor 10 to the other end of the first heat exchanger 31 and the other end of the third heat exchanger 41, and also connects the return port 12 of the compressor 10 to the outdoor heat exchanger 21. The high-temperature, high-pressure gaseous refrigerant discharged from the exhaust port 11 of the compressor 10 is divided into two paths. One path flows through the first solenoid valve 61, is divided into three parts, and flows to the second heat exchanger 32. At the second heat exchanger 32, a large amount of heat is released, liquefying into liquid refrigerant, thus achieving heating.

[0067] In addition, the multi-split air conditioning system 100 also includes a high-low pressure valve 35, which is connected between the second heat exchanger 32 and the first solenoid valve 61 and the second solenoid valve 62. Specifically, one end of the high-low pressure valve 35 is connected to the second heat exchanger 32, and the other end of the high-low pressure valve 35 is connected to one end of the first solenoid valve 61 and one end of the second solenoid valve 62. High-temperature and high-pressure or high-temperature and low-pressure gaseous refrigerant can pass through the high-low pressure valve 35. When the first solenoid valve 61 is open and the second solenoid valve 62 is closed, the high-temperature and high-pressure gaseous refrigerant flows from the exhaust port 11 of the compressor 10 through the high-low pressure valve 35, thereby flowing to the second heat exchanger 32 and the domestic water heater 51, thus achieving water heating and temperature regulation.

[0068] When the air conditioner is in the first mode, namely the single cooling mode, the first solenoid valve 61 is closed and the second solenoid valve 62 is open. The high-temperature and low-pressure gaseous refrigerant flows through the high and low pressure valves 35 and flows to the return port 12 of the compressor 10. At this time, the domestic water heater 51 and the underfloor heating are not connected to the compressor 10 and do not participate in the operation of the multi-split air conditioning system 100.

[0069] according to Figures 1-4As shown, the multi-split air conditioning system 100 also includes a gas valve 36, which connects the compressor 10 to the other end of the first heat exchanger 31 and the other end of the third heat exchanger 41. Specifically, one end of the gas valve 36 is connected to the other ends of both the first and third heat exchangers 31, and the other end is connected to a fourth valve port. High-temperature, high-pressure or high-temperature, low-pressure gaseous refrigerant can pass through the gas valve 36. When the multi-split air conditioning system 100 is in the first or second mode, the first valve port is connected to the second valve port, and the third and fourth valve ports are connected. At this time, when the first valve port is connected to the second valve port, the exhaust port 11 of the compressor 10 is connected to the outdoor heat exchanger 21, which acts as a condenser. When the third valve port and the fourth valve port are connected, the return port 12 of the compressor 10 is connected to the other end of the first heat exchanger 31 and the third heat exchanger 41, which act as evaporators. The low-temperature, low-pressure liquid refrigerant absorbs heat at the first heat exchanger 31 and the third heat exchanger 41 and vaporizes into a high-temperature, high-pressure gaseous refrigerant, thus achieving refrigeration.

[0070] like Figure 4 As shown, when the multi-split air conditioning system 100 is in the third mode, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port. When the first valve port is connected to the fourth valve port, the exhaust port 11 of the compressor 10 is connected to the other end of the first heat exchanger 31 and the third heat exchanger 41. The high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port 11 of the compressor 10 flows through the gas valve 36, and thus flows to the first heat exchanger 31 and the third heat exchanger 41 to regulate the indoor temperature.

[0071] like Figures 1-4 As shown, the multi-split air conditioning system 100 further includes a liquid valve 23 and a first throttling element 22. The liquid valve 23 is connected between one end of the heat exchange assembly 30 and one end of the third heat exchanger 41 and the other end of the outdoor heat exchanger 21. The first throttling element 22 is connected between the liquid valve 23 and the other end of the outdoor heat exchanger 21. Specifically, one end of the liquid valve 23 is connected to one end of the heat exchange assembly 30, that is, one end of the liquid valve 23 is connected to one end of the first heat exchanger 31 and one end of the second heat exchanger 32, and one end of the liquid valve 23 is connected to one end of the third heat exchanger 41. The other end of the liquid valve 23 is connected to one end of the first throttling element 22, and the other end of the first throttling element 22 is connected to the other end of the outdoor heat exchanger 21. The second throttling element 33 can regulate pressure and flow rate, and both low-temperature, high-pressure and low-temperature, low-pressure liquid refrigerant can pass through the liquid valve 23.

[0072] When the multi-split air conditioning system 100 is in the first or second mode, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port. At this time, when the first valve port is connected to the second valve port, the exhaust port 11 of the compressor 10 is connected to the outdoor heat exchanger 21. The outdoor heat exchanger 21 acts as a condenser at this time. The high-temperature and high-pressure gaseous refrigerant releases a large amount of heat at the outdoor heat exchanger 21 and liquefies into liquid refrigerant. The liquid refrigerant first flows through the first throttling element 22 to reduce the pressure of the liquid refrigerant. The refrigerant becomes a low-temperature and low-pressure liquid refrigerant, and then flows through the liquid valve 23 to the third heat exchanger 41 or the heat exchange assembly 30.

[0073] When the multi-split air conditioning system 100 is in the third mode, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port. When the second valve port is connected to the third valve port, the return port 12 of the compressor 10 is connected to the outdoor heat exchanger 21. At this time, the outdoor heat exchanger 21 acts as an evaporator. The liquid refrigerant flowing out from the heat exchange component 30, the third heat exchanger 41, the domestic water heater 51, and the underfloor heating system 55 first passes through the liquid valve 23, and finally the refrigerant returns to the compressor 10 through the outdoor heat exchanger 21.

[0074] Combination Figure 1 and Figure 2 As shown, the heat exchange assembly 30 further includes a second throttling element 33 and a third throttling element 34. The second throttling element 33 is connected between the liquid valve 23 and the first heat exchanger 31, and the third throttling element 34 is connected between the liquid valve 23 and the second heat exchanger 32. The multi-split air conditioning system 100 further includes a fourth throttling element 42, which is connected between the liquid valve 23 and the third heat exchanger 41. One end of the second throttling element 33 is connected to the first heat exchanger 31, and the other end is connected to the liquid valve 23. One end of the third throttling element 34 is connected to the second heat exchanger 32, and the other end is connected to the liquid valve 23. The second throttling element 33, the third throttling element 34, and the fourth throttling element 42 can regulate the pressure of the liquid refrigerant. When the liquid refrigerant passes through the second throttling element 33 and the third throttling element 34, its pressure drops due to obstruction, causing some of the liquid refrigerant to vaporize. At the same time, it absorbs the latent heat of vaporization, and its own temperature also decreases accordingly, becoming low-temperature, low-pressure wet steam.

[0075] like Figure 2 As shown, when the multi-split air conditioning system 100 is in the first mode, i.e., the single cooling mode, the first solenoid valve 61 is closed, the second solenoid valve 62 is open, the third throttling element 34 regulates the pressure of the liquid refrigerant flowing to the second heat exchanger 32; the second throttling element 33 regulates the pressure of the liquid refrigerant flowing to the first heat exchanger 31; and the fourth throttling element 42 regulates the pressure of the liquid refrigerant flowing to the third heat exchanger 41.

[0076] like Figure 3As shown, when the multi-split air conditioning system 100 is in the second mode, when the first solenoid valve 61 is open and the second solenoid valve 62 is closed, the high-temperature and high-pressure gaseous refrigerant flows from the exhaust port 11 of the compressor 10 to the second heat exchanger 32, where it undergoes heat exchange and liquefies into liquid refrigerant. The third throttling element 34 regulates the pressure of the liquid refrigerant flowing out of the second heat exchanger 32; the second throttling element 33 regulates the pressure of the liquid refrigerant flowing to the first heat exchanger 31; and the fourth throttling element 42 regulates the pressure of the liquid refrigerant flowing to the third heat exchanger 41.

[0077] like Figure 4 As shown, when the multi-split air conditioning system 100 is in the third mode, when the first solenoid valve 61 is open and the second solenoid valve 62 is closed, the high-temperature and high-pressure gaseous refrigerant flows from the exhaust port 11 of the compressor 10 to the first heat exchanger 31, the second heat exchanger 32 and the third heat exchanger 41. At the first heat exchanger 31, the second heat exchanger 32 and the third heat exchanger 41, the gaseous refrigerant is liquefied by heat exchange. The third throttling element 34 regulates the pressure of the liquid refrigerant flowing out of the second heat exchanger 32; the second throttling element 33 regulates the pressure of the liquid refrigerant flowing out of the first heat exchanger 31; and the fourth throttling element 42 regulates the pressure of the liquid refrigerant flowing out of the third heat exchanger 41.

[0078] The domestic water heater 51 includes a water tank 52 and a fifth throttling element 54, which is connected between the liquid valve 23 and the water tank 52; the underfloor heating system 55 includes a hot water module 56 and a sixth throttling element 58, which is connected between the liquid valve 23 and the hot water module 56. Specifically, one end of the fifth throttling element 54 is connected to the water tank 52, and the other end of the fifth throttling element 54 is connected to one end of the liquid valve 23, one end of the first heat exchanger 31, one end of the second heat exchanger 32, and one end of the third heat exchanger 41. The fifth throttling element 54 regulates the pressure and flow rate of the liquid refrigerant flowing out of the water tank 52, converting the high-pressure liquid refrigerant into a low-pressure liquid refrigerant. One end of the sixth throttling element 58 is connected to the hot water module 56, and the other end is connected to one end of the liquid valve 23, one end of the first heat exchanger 31, one end of the second heat exchanger 32, and one end of the third heat exchanger 41. The sixth throttling element 58 regulates the pressure and flow rate of the liquid refrigerant flowing out of the water tank 52, converting the high-pressure liquid refrigerant into a low-pressure liquid refrigerant. The low-pressure liquid refrigerant then flows to the first heat exchanger 31, the third heat exchanger 41, or the outdoor heat exchanger 21.

[0079] Combination Figures 1-10As shown, the multi-split air conditioning system 100 also includes a liquid receiver tank. One end of the liquid receiver tank is connected to the return air port 12, and the other end is connected to the second solenoid valve 62 and the third valve port. In other words, the liquid receiver tank is used to store liquid refrigerant. High-temperature, low-pressure liquid refrigerant is first stored in the liquid receiver tank to meet the refrigerant requirements under different power consumption conditions. The high-temperature, low-pressure liquid refrigerant can flow from the third valve port or the second solenoid valve 62 to the liquid receiver tank, and then return to the compressor 10 from the return air port 12.

[0080] In addition, such as Figure 6 As shown, this is the fifth mode of the multi-split air conditioning system 100, the heating-hot water mode. Based on the third mode, the third solenoid valve 53 is opened and the fourth solenoid valve 57 is closed, so that water is heated while heating is being provided.

[0081] like Figure 7 As shown, this is the sixth mode of the multi-split air conditioning system 100, the heating-floor heating mode. Based on the third mode, the third solenoid valve 53 is closed and the fourth solenoid valve 57 is opened, so that the floor heating is achieved while heating is being provided.

[0082] like Figure 8 As shown, this is the seventh mode of the multi-split air conditioning system 100, the non-cooling and non-dehumidifying mode. Based on the second mode, the fifth solenoid valve 24 is closed, the fourth throttling element 42 is closed, and only the first heat exchanger 31 and the second heat exchanger 32 are working, realizing the cooling without dehumidifying function.

[0083] like Figure 9 As shown, this is the eighth mode of the multi-split air conditioning system 100. Based on the first mode, the third throttling element 34 is closed, and only the first heat exchanger 31 and the third heat exchanger 41 are working, which can reduce the indoor temperature and achieve cooling.

[0084] like Figure 10 As shown, this is the ninth mode of the multi-split air conditioning system 100. Based on the first mode, the second throttling element 33 and the fourth throttling element 42 are closed, and only the second heat exchanger 32 is working, which can reduce the indoor temperature and achieve cooling.

[0085] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0086] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0087] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-split air conditioning system, comprising: The compressor is equipped with an exhaust port and an exhaust port; Outdoor heat exchanger; The heat exchange assembly includes: a first heat exchanger and a second heat exchanger, one end of which is connected to the outdoor heat exchanger. A domestic water heater, wherein the domestic water heater is connected between the compressor and the outdoor heat exchanger, and the domestic water heater is connected in parallel with the second heat exchanger; A floor heating system, wherein the floor heating system is connected between the compressor and the outdoor heat exchanger, and the floor heating system is connected in parallel with the second heat exchanger; Its features are, A first solenoid valve selectively connects the exhaust port and the other end of the second heat exchanger; A second solenoid valve selectively connects the return port and the other end of the second heat exchanger; A multi-way valve selectively connects one end of the compressor and the outdoor heat exchanger, and selectively connects the compressor and the other end of the heat exchange assembly.

2. The multi-split air conditioning system according to claim 1, characterized in that, The multi-port valve includes a first valve port, a second valve port, a third valve port, and a fourth valve port; the first valve port is connected to the exhaust port, the second valve port is connected to the outdoor heat exchanger, the third valve port is connected to the return gas port, and the fourth valve port is connected to the other end of the first heat exchanger.

3. The multi-split air conditioning system according to claim 2, characterized in that, The multi-split air conditioning system further includes a third heat exchanger, one end of which is connected to the outdoor heat exchanger, and the other end of which is connected to the fourth valve port.

4. The multi-split air conditioning system according to claim 2, characterized in that, The domestic water heater further includes: a third solenoid valve, the third solenoid valve being connected between the domestic water heater and the compressor; and / or, The underfloor heating system further includes a fourth solenoid valve, which is connected between the underfloor heating system and the compressor.

5. The multi-split air conditioning system according to claim 3, characterized in that, The multi-split air conditioning system further includes a high-low pressure valve, which is connected between the second heat exchanger and the first solenoid valve and the second solenoid valve.

6. The multi-split air conditioning system according to claim 5, characterized in that, The multi-split air conditioning system further includes: a gas valve, which connects the compressor to the other end of the first heat exchanger and the other end of the third heat exchanger.

7. The multi-split air conditioning system according to claim 6, characterized in that, The multi-split air conditioning system further includes: a liquid valve and a first throttling element, wherein the liquid valve is connected between one end of the heat exchange assembly and one end of the third heat exchanger and the other end of the outdoor heat exchanger, and the first throttling element is connected between the liquid valve and the other end of the outdoor heat exchanger.

8. The multi-split air conditioning system according to claim 7, characterized in that, The heat exchange assembly further includes: a second throttling element and a third throttling element, the second throttling element being connected between the liquid valve and the first heat exchanger, and the third throttling element being connected between the liquid valve and the second heat exchanger; and... The multi-split air conditioning system further includes a fourth throttling element, which is connected between the liquid valve and the third heat exchanger.

9. The multi-split air conditioning system according to claim 8, characterized in that, The domestic water heater includes: a water tank and a fifth throttling element, wherein the fifth throttling element is connected between the liquid valve and the water tank; Furthermore, the underfloor heating system includes a hot water module and a sixth throttling element, the sixth throttling element being connected between the liquid valve and the hot water module.

10. The multi-split air conditioning system according to claim 2, characterized in that, Also includes: The liquid storage tank has one end connected to the return air port and the other end connected to the second solenoid valve and the third valve port.

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