Heat pump air conditioning system

Abstract

The utility model provides a heat pump air conditioning system. The heat pump air conditioning system comprises a compressor; an exhaust port of the compressor is communicated with an inlet of the three-way valve; a first outlet of the three-way valve is communicated with a first connecting pipe of the four-way valve, and a second connecting pipe of the four-way valve is communicated with an air inlet of the compressor; the heat exchanger assembly comprises three heat exchangers, one heat exchanger is communicated with a second outlet of the three-way valve, one heat exchanger is communicated with a third connecting pipe of the four-way valve, and the other heat exchanger is communicated with a fourth connecting pipe of the four-way valve; in the operation process of the heat pump air conditioning system, any two heat exchangers in the heat exchanger assembly communicate with each other. The air source heat pump air-conditioning system effectively solves the problem that normal operation of the system is affected due to the fact that an electronic valve located at the exhaust port of the compressor in the air source heat pump air-conditioning system in the prior art is poor in operation reliability.

Description

Technical Field

[0001] This utility model relates to the field of heat pump air conditioning technology, and more specifically, to a heat pump air conditioning system. Background Technology

[0002] Currently, in existing air source heat pump air conditioning systems, an outdoor unit is typically combined with an indoor unit and a water tank to achieve functions such as air conditioning cooling, heating, and water heating. The specific principle is that the outdoor unit absorbs heat from the environment and then transfers the heat to the indoor unit or water tank through refrigerant circulation to achieve the effect of heating or hot water production.

[0003] However, in existing technologies, air source heat pump air conditioning systems typically have multiple solenoid valves and electronic expansion valves installed at the compressor's exhaust port to control the flow of refrigerant. These electronic valves are constantly subjected to the impact of high-pressure refrigerant and need to be opened and closed frequently, which not only accelerates the wear of their internal components and shortens their service life, but also affects the operational stability and normal use of the entire heat pump air conditioning system. Utility Model Content

[0004] The main objective of this invention is to provide a heat pump air conditioning system to solve the problem that the electronic valve located at the compressor exhaust port in the existing air source heat pump air conditioning system has poor operational reliability, which affects the normal operation of the system.

[0005] To achieve the above objectives, this utility model provides a heat pump air conditioning system, comprising: a compressor; a three-way valve, wherein the exhaust port of the compressor is connected to the inlet of the three-way valve; a four-way valve, wherein the first outlet of the three-way valve is connected to the first connecting pipe of the four-way valve, and the second connecting pipe of the four-way valve is connected to the air inlet of the compressor; and a heat exchanger assembly, comprising three heat exchangers, wherein one heat exchanger is connected to the second outlet of the three-way valve, one heat exchanger is connected to the third connecting pipe of the four-way valve, and the other heat exchanger is connected to the fourth connecting pipe of the four-way valve; wherein, during the operation of the heat pump air conditioning system, any two heat exchangers in the heat exchanger assembly are connected.

[0006] Furthermore, the three heat exchangers are a water tank heat exchanger, an indoor unit heat exchanger, and an outdoor unit heat exchanger. The water tank heat exchanger is connected to the second outlet of the three-way valve, the indoor unit heat exchanger is connected to the third pipe of the four-way valve, and the outdoor unit heat exchanger is connected to the fourth pipe of the four-way valve.

[0007] Furthermore, the first takeover is the D takeover.

[0008] Furthermore, the heat pump air conditioning system also includes: a main pipe, the first end of which is connected to the water tank heat exchanger; a first branch pipe, the first end of which is connected to the second end of the main pipe, and the second end of which is connected to the outdoor unit heat exchanger; a second branch pipe, the first end of which is connected to the second end of the main pipe, and the second end of which is connected to the indoor unit heat exchanger; and a first valve group, which is installed on the second branch pipe, and includes a first electronic expansion valve and a first capillary tube.

[0009] Furthermore, the heat pump air conditioning system also includes a second valve group installed on the main pipeline. The second valve group includes: a second electronic expansion valve; a second capillary tube; and a first check valve. Along the flow direction of the medium in the main pipeline, the first check valve and the second capillary tube are located on both sides of the second electronic expansion valve, respectively. The conduction direction of the first check valve is from the first end to the second end of the main pipeline.

[0010] Furthermore, the heat pump air conditioning system also includes a third valve group installed on the first branch pipe. The third valve group includes: a solenoid valve; and a second check valve, the conduction direction of which is from the first end to the second end of the first branch pipe.

[0011] Furthermore, the third valve group also includes a third check valve, which is connected in parallel with both the solenoid valve and the second check valve. The conduction direction of the third check valve is from the second end to the first end of the first branch pipe.

[0012] Furthermore, there are at least two first capillary tubes, with at least one first capillary tube located on the first side of the first electronic expansion valve and at least another first capillary tube located on the second side of the first electronic expansion valve, along the flow direction of the medium in the second branch pipe.

[0013] Furthermore, the second connecting pipe is an S-connector, the third connecting pipe is an E-connector, and the fourth connecting pipe is a C-connector. The heat pump air conditioning system also includes a control module, which is electrically connected to the three-way valve, the four-way valve, the first valve group, the second valve group, and the third valve group. The heat pump air conditioning system has an air conditioning cooling mode. When the heat pump air conditioning system is in air conditioning cooling mode, the control module controls the inlet of the three-way valve to connect to the first outlet and disconnect from the second outlet, controls the D-connector of the four-way valve to connect to the C-connector and the S-connector to connect to the E-connector, controls the solenoid valve to be in the closed state, controls the first electronic expansion valve to be in the open state, and controls the second electronic expansion valve to be in the closed state. The heat pump air conditioning system also has an air conditioning heating mode. When the heat pump air conditioning system is in air conditioning heating mode, the control module controls the inlet of the three-way valve to connect to the first outlet and disconnect from the second outlet, controls the D-connector of the four-way valve to connect to the E-connector and the S-connector to connect to the C-connector, and controls... The solenoid valve is in the open state, the first electronic expansion valve is in the open state, and the second electronic expansion valve is in the closed state. The heat pump air conditioning system also has a heat pump hot water mode. When the heat pump air conditioning system is in the heat pump hot water mode, the control module controls the inlet of the three-way valve to connect with the second outlet and disconnect from the first outlet, controls the D-connector of the four-way valve to connect with the E-connector and the S-connector to connect with the C-connector, controls the solenoid valve to be in the open state, controls the first electronic expansion valve to be in the open state, and controls the second electronic expansion valve to be in the closed state. The heat pump air conditioning system also has a cooling heat recovery mode. When the heat pump air conditioning system is in the cooling heat recovery mode, the control module controls the inlet of the three-way valve to connect with the second outlet and disconnect from the first outlet, controls the D-connector of the four-way valve to connect with the C-connector and the S-connector to connect with the E-connector, controls the solenoid valve to be in the closed state, and controls both the first and second electronic expansion valves to be in the open state.

[0014] Furthermore, the heat pump air conditioning system also includes: a first fan, which is correspondingly arranged with the indoor unit heat exchanger to dissipate heat from the indoor unit heat exchanger; and / or, a second fan, which is correspondingly arranged with the outdoor unit heat exchanger to dissipate heat from the outdoor unit heat exchanger.

[0015] The present invention provides a heat pump air conditioning system comprising a compressor, a three-way valve, a four-way valve, and a heat exchanger assembly. The compressor's exhaust port is connected to the three-way valve's inlet. The three-way valve's first outlet is connected to the four-way valve's first connecting pipe, and the four-way valve's second connecting pipe is connected to the compressor's air inlet. The heat exchanger assembly includes three heat exchangers: one connected to the three-way valve's second outlet, one connected to the four-way valve's third connecting pipe, and the other connected to the four-way valve's fourth connecting pipe. During operation of the heat pump air conditioning system, any two heat exchangers in the assembly are connected. By replacing the original two solenoid valves with a three-way valve, the heat pump air conditioning system is simplified, the number of valves is reduced, system costs and maintenance difficulty are lowered, and the problem of poor reliability of the electronic valve located at the compressor's exhaust port in existing air source heat pump air conditioning systems, which affects the normal operation of the system, is solved. Meanwhile, the heat pump air conditioning system can selectively switch between three-way and four-way valves to allow the refrigerant to flow through different heat exchangers according to different needs, thereby realizing the cooling and heating functions of the air conditioner and the hot water preparation of the water heater. At the same time, in the cooling mode, it can recover waste heat to heat the water tank, which improves the functionality of the heat pump air conditioning system and meets the different usage needs of users. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of an embodiment of a heat pump air conditioning system according to the present invention is shown.

[0018] The above figures include the following reference numerals:

[0019] 10. Compressor; 11. Exhaust port; 12. Inlet port;

[0020] 20. Three-way valve; 21. Inlet; 22. First outlet; 23. Second outlet;

[0021] 30. Four-way valve; 31. First connecting pipe; 32. Second connecting pipe; 33. Third connecting pipe; 34. Fourth connecting pipe;

[0022] 40. Heat exchanger assembly; 41. Water tank heat exchanger; 42. Indoor unit heat exchanger; 43. Outdoor unit heat exchanger;

[0023] 50. Main pipeline; 60. First branch pipeline; 70. Second branch pipeline;

[0024] 80. First valve assembly; 81. First electronic expansion valve; 82. First capillary tube;

[0025] 90. Second valve assembly; 91. Second electronic expansion valve; 92. Second capillary tube; 93. First check valve;

[0026] 100, Third valve assembly; 110, Solenoid valve; 120, Second check valve; 130, Third check valve; 140, First fan; 150, Second fan. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] To address the problem of poor reliability of the electronic valve located at the compressor exhaust port in existing air source heat pump air conditioning systems, which affects the normal operation of the system, this application provides a heat pump air conditioning system.

[0031] like Figure 1 As shown, the heat pump air conditioning system includes a compressor 10, a three-way valve 20, a four-way valve 30, and a heat exchanger assembly 40. The exhaust port 11 of the compressor 10 is connected to the inlet 21 of the three-way valve 20, the first outlet 22 of the three-way valve 20 is connected to the first connecting pipe 31 of the four-way valve 30, and the second connecting pipe 32 of the four-way valve 30 is connected to the air inlet 12 of the compressor 10. The heat exchanger assembly 40 includes three heat exchangers: one heat exchanger is connected to the second outlet of the three-way valve 20, one heat exchanger is connected to the third connecting pipe 33 of the four-way valve 30, and the other heat exchanger is connected to the fourth connecting pipe 34 of the four-way valve 30; wherein, during the operation of the heat pump air conditioning system, any two heat exchangers in the heat exchanger assembly 40 are connected.

[0032] By applying the technical solution of this embodiment, a three-way valve 20 is used to replace the original two solenoid valves. This not only simplifies the heat pump air conditioning system and reduces the number of valves, but also lowers system costs and maintenance difficulty. Furthermore, it solves the problem in existing air source heat pump air conditioning systems where the electronic valve located at the compressor exhaust port has poor operational reliability, affecting normal system operation. Simultaneously, the heat pump air conditioning system can selectively switch between the three-way valve 20 and the four-way valve 30 according to different needs, allowing the refrigerant to flow through different heat exchangers to achieve air conditioning cooling, heating, and hot water preparation for water heaters. In cooling mode, it can also recover waste heat to heat the water tank, improving the functionality of the heat pump air conditioning system to meet different user needs.

[0033] like Figure 1 As shown, the three heat exchangers are a water tank heat exchanger 41, an indoor unit heat exchanger 42, and an outdoor unit heat exchanger 43. The water tank heat exchanger 41 is connected to the second outlet 23 of the three-way valve 20, the indoor unit heat exchanger 42 is connected to the third connecting pipe 33 of the four-way valve 30, and the outdoor unit heat exchanger 43 is connected to the fourth connecting pipe 34 of the four-way valve 30. Thus, by connecting the water tank heat exchanger 41, the indoor unit heat exchanger 42, and the outdoor unit heat exchanger 43 to different connecting pipes of the three-way valve 20 and the four-way valve 30, respectively, the heat pump air conditioning system achieves efficient energy conversion in different operating modes. Simultaneously, by switching between the three-way valve 20 and the four-way valve 30, the air conditioner can perform cooling and heating functions, as well as the water heater can prepare hot water, enabling the heat pump air conditioning system to have multiple operating modes to meet the needs of users in different seasons and scenarios.

[0034] In this embodiment, the water tank heat exchanger 41 is directly connected to the second outlet 23 of the three-way valve 20. When the heat pump air conditioning system is in heat pump hot water mode, the high-temperature and high-pressure refrigerant discharged from the exhaust port 11 of the compressor 10 flows directly to the water tank heat exchanger 41, efficiently converting the condensation heat of the refrigerant into hot water and reducing energy loss during the transfer process. Simultaneously, the indoor unit heat exchanger 42 and the outdoor unit heat exchanger 43 are respectively connected to the third connecting pipe 33 and the fourth connecting pipe 34 of the four-way valve 30, ensuring correct refrigerant flow in different modes, preventing refrigerant backflow, and protecting the internal components of the system from damage.

[0035] In this embodiment, the first connector 31 is a D connector.

[0036] like Figure 1As shown, the heat pump air conditioning system also includes a main pipe 50, a first branch pipe 60, a second branch pipe 70, and a first valve assembly 80. The first end of the main pipe 50 is connected to the water tank heat exchanger 41. The first end of the first branch pipe 60 is connected to the second end of the main pipe 50, and the second end of the first branch pipe 60 is connected to the outdoor unit heat exchanger 43. The first end of the second branch pipe 70 is connected to the second end of the main pipe 50, and the second end of the second branch pipe 70 is connected to the indoor unit heat exchanger 42. The first valve assembly 80 is installed on the second branch pipe 70 and includes a first electronic expansion valve 81 and a first capillary tube 82. Thus, the main pipe 50, the first branch pipe 60, and the second branch pipe 70 constitute the path for the refrigerant to flow through the water tank heat exchanger 41, the outdoor unit heat exchanger 43, and the indoor unit heat exchanger 42. This piping design ensures the on-demand distribution of refrigerant among the different heat exchangers, improving the efficiency of the heat pump air conditioning system in various operating modes. Meanwhile, the aforementioned configuration of the first valve group 80 enables the heat pump air conditioning system to better control and balance the refrigerant flow and pressure between different heat exchangers, avoiding the negative impact of sudden changes in refrigerant flow rate or pressure on system stability, and ensuring stable operation of the system under various working conditions.

[0037] In this embodiment, the first electronic expansion valve 81 and the first capillary tube 82 in the first valve group 80 work together to regulate the refrigerant flow path from the water tank heat exchanger 41 to the indoor unit heat exchanger 42. The throttling effect of the first capillary tube 82 combined with the fine adjustment of the first electronic expansion valve 81 can effectively manage the refrigerant pressure, reduce energy loss, and achieve more efficient cooling or heating conversion. At the same time, it also reduces the burden on the first electronic expansion valve 81 and extends its service life.

[0038] like Figure 1As shown, the heat pump air conditioning system also includes a second valve group 90 installed on the main pipe 50. The second valve group 90 includes a second electronic expansion valve 91, a second capillary tube 92, and a first one-way valve 93. Along the flow direction of the medium within the main pipe 50, the first one-way valve 93 and the second capillary tube 92 are located on either side of the second electronic expansion valve 91. The first one-way valve 93 is open from the first end to the second end of the main pipe 50. Thus, the first one-way valve 93 will only be open when the medium within the main pipe 50 flows from the water tank heat exchanger 41 to the second branch pipe 70 and the first branch pipe 60. This prevents the medium from flowing back into the water tank heat exchanger 41, which could cause a decrease in system efficiency and component damage, thereby improving the stability and safety of the heat pump air conditioning system. Meanwhile, the second electronic expansion valve 91 and the second capillary tube 92 work together to throttle and regulate the pressure of the refrigerant flowing out of the water tank heat exchanger 41. Specifically, the second capillary tube 92 first plays a pre-pressure reduction role, lowering the refrigerant pressure to a more moderate level. Then, the second electronic expansion valve 91 makes more precise adjustments based on this to adapt to the needs of different working modes, reducing the direct high-pressure impact on the second electronic expansion valve 91 and extending its service life.

[0039] In this embodiment, when the heat pump air conditioning system is in heat pump hot water mode and cooling heat recovery mode, the refrigerant is efficiently utilized in the water tank heat exchanger 41, and the released heat is recovered for heating the water tank or assisting indoor cooling. The presence of the second valve group 90 ensures the efficiency and controllability of this process, and improves the efficiency of heat recovery and use.

[0040] Specifically, the water tank heat exchanger 41 and the indoor unit heat exchanger 42 are connected via a main pipe 50 and a first branch pipe 60. A second electronic expansion valve 91 is installed on the main pipe 50, and a first electronic expansion valve 81 is installed on the first branch pipe 60. A second capillary tube 92 is installed on the side of the second electronic expansion valve 91 closest to the water tank heat exchanger 41, and first capillary tubes 82 are installed on both sides of the first electronic expansion valve 81. After the high-pressure refrigerant passes through the capillary tubes for throttling, the refrigerant pressure is reduced to medium pressure, reducing the impact of high-pressure refrigerant on the electronic expansion valves.

[0041] like Figure 1As shown, the heat pump air conditioning system also includes a third valve group 100 installed on the first branch pipe 60. The third valve group 100 includes a solenoid valve 110 and a second one-way valve 120. The conduction direction of the second one-way valve 120 is from the first end to the second end of the first branch pipe 60. In this way, the solenoid valve 110, as an active control element, can selectively open or close according to the needs of the system operating mode, thereby controlling whether the refrigerant flows through the outdoor unit heat exchanger 43. This allows the system to flexibly switch between different operating modes, such as air conditioning cooling, heating, or heat pump hot water preparation, according to user needs and external environmental conditions. At the same time, the design of the second one-way valve 120 ensures the unidirectional flow of refrigerant from the main pipe 50 to the outdoor unit heat exchanger 43, preventing the system efficiency reduction and component damage that may be caused by refrigerant backflow, thus maintaining the correct flow direction of refrigerant in the heat pump air conditioning system and ensuring the stable operation of the system.

[0042] In this embodiment, when the heat pump air conditioning system is in air conditioning heating or heat pump hot water mode, if the solenoid valve 110 is open, the second one-way valve 120 cooperates with the solenoid valve 110 to ensure that no abnormal pressure accumulation or backflow occurs during the process of refrigerant flowing from the water tank heat exchanger 41 to the outdoor unit heat exchanger 43, thereby enhancing the safety of the heat pump air conditioning system, preventing possible high-pressure impacts, and extending the system life. In the cooling and heat recovery mode, the solenoid valve 110 is usually in the closed state, thereby avoiding unnecessary refrigerant flow to the outdoor unit heat exchanger 43, reducing energy waste, and also preventing the outdoor unit from being activated in a non-working mode, saving power consumption.

[0043] like Figure 1 As shown, the third valve assembly 100 also includes a third check valve 130. The third check valve 130 is connected in parallel with the solenoid valve 110 and the second check valve 120. The conduction direction of the third check valve 130 is from the second end to the first end of the first branch pipe 60. This configuration of the third check valve 130 provides a reverse flow path for the system, i.e., a flow path from the outdoor unit heat exchanger 43 to the main pipe 50. In cooling mode, this configuration ensures that the refrigerant circulates in reverse as needed within the system, enhancing the system's adaptability and flexibility under varying operating conditions. Simultaneously, in the event of a failure in the solenoid valve 110 or other parts of the system, the third check valve 130 can serve as a backup flow path, allowing the refrigerant to flow backward to a certain extent, thereby preventing a complete system shutdown or larger-scale failure, providing a degree of safety redundancy and emergency handling capability.

[0044] In this embodiment, when the high-pressure refrigerant flows through the first branch pipe 60, the third check valve 130 can play a role in pressure balancing. Especially during rapid system mode switching, it can help unload excessive pressure, prevent damage to sensitive components in the system, and improve the overall stability and safety of the system. Simultaneously, in certain modes, particularly when the solenoid valve 110 is closed but the system still needs to circulate refrigerant through the first branch pipe 60, the aforementioned configuration of the third check valve 130 can reduce unnecessary pressure loss, thereby optimizing system energy consumption and saving energy to a certain extent.

[0045] Specifically, the indoor unit heat exchanger 42 and the outdoor unit heat exchanger 43 are connected by the main pipe 50 and the second branch pipe 70. A solenoid valve 110 is installed on the second branch pipe 70. A second check valve 120 is installed in series on the side of the solenoid valve 110 near the outdoor unit heat exchanger 43. A third check valve 130 is then connected in parallel. The high-pressure refrigerant flowing out of the outdoor unit heat exchanger 43 does not flow through the solenoid valve 110, but flows out through the third check valve 130.

[0046] Optionally, at least two first capillary tubes 82 are provided. Along the flow direction of the medium within the second branch pipe 70, at least one first capillary tube 82 is located on the first side of the first electronic expansion valve 81, and at least another first capillary tube 82 is located on the second side of the first electronic expansion valve 81. In this way, by providing at least two first capillary tubes 82 on both sides of the first electronic expansion valve 81, the pressure of the refrigerant can be gradually reduced, thereby preventing the first electronic expansion valve 81 from being impacted by sudden high-pressure refrigerant surges. Specifically, the first capillary tube on the first side initially reduces the pressure, while the second capillary tube further refines the pressure regulation, ensuring a smooth transition of the refrigerant to the next heat exchange stage and reducing pressure fluctuations and energy losses in the system.

[0047] In this embodiment, there are two first capillary tubes 82. Along the flow direction of the medium in the second branch pipe 70, one first capillary tube 82 is located on the first side of the first electronic expansion valve 81, and the other first capillary tube 82 is located on the second side of the first electronic expansion valve 81. This dual-capillary design allows the heat pump air conditioning system to maintain good performance in different operating modes. Whether in heating, cooling, or hot water supply mode, the capillary tubes can adjust the refrigerant flow and pressure according to system needs, achieving flexible control and efficient operation in multiple modes.

[0048] In this embodiment, the second connecting pipe 32 is an S-connector, the third connecting pipe 33 is an E-connector, and the fourth connecting pipe 34 is a C-connector. The heat pump air conditioning system also includes a control module, which is electrically connected to the three-way valve 20, the four-way valve 30, the first valve group 80, the second valve group 90, and the third valve group 100. The heat pump air conditioning system includes an air conditioning cooling mode. In this mode, the control module controls the inlet 21 of the three-way valve 20 to connect with the first outlet 22 and disconnect from the second outlet; controls the D-connector of the four-way valve 30 to connect with the C-connector and the S-connector to connect with the E-connector; controls the solenoid valve 110 to be closed; controls the first electronic expansion valve 81 to be open; and controls the second electronic expansion valve 91 to be closed. The system also includes an air conditioning heating mode. In this mode, the control module controls the inlet 21 of the three-way valve 20 to connect with the first outlet 22 and disconnect from the second outlet; controls the D-connector of the four-way valve 30 to connect with the E-connector and the S-connector to connect with the C-connector; controls the solenoid valve 110 to be open; controls the first electronic expansion valve 81 to be open; and controls the second electronic expansion valve 91 to be closed. In the off state; the heat pump air conditioning system also has a heat pump hot water mode. When the heat pump air conditioning system is in the heat pump hot water mode, the control module controls the inlet 21 of the three-way valve 20 to connect with the second outlet and disconnect from the first outlet 22, controls the D-connector of the four-way valve 30 to connect with the E-connector and the S-connector to connect with the C-connector, controls the solenoid valve 110 to be in the open state, controls the first electronic expansion valve 81 to be in the open state, and controls the second electronic expansion valve 91 to be in the closed state; the heat pump air conditioning system also has a cooling heat recovery mode. When the heat pump air conditioning system is in the cooling heat recovery mode, the control module controls the inlet 21 of the three-way valve 20 to connect with the second outlet and disconnect from the first outlet 22, controls the D-connector of the four-way valve 30 to connect with the C-connector and the S-connector to connect with the E-connector, controls the solenoid valve 110 to be in the closed state, and controls the first electronic expansion valve 81 and the second electronic expansion valve 91 to be in the open state. In this way, the control module can precisely control the opening and closing of valves according to system requirements, enabling rapid switching between air conditioning cooling, air conditioning heating, heat pump hot water, and cooling and heat recovery modes. This ensures that the system can adjust to the most suitable operating state in a timely manner according to the external environment and user needs, thereby improving the user experience.

[0049] Specifically, in air conditioning cooling mode, by closing solenoid valve 110 and the second electronic expansion valve 91 while simultaneously opening the first electronic expansion valve 81, efficient circulation of refrigerant between the water tank heat exchanger 41 and the indoor unit heat exchanger 42 is ensured, reducing unnecessary energy waste. In air conditioning heating mode, the opening of solenoid valve 110 and the closing of the second electronic expansion valve 91 allow the refrigerant to flow smoothly through the outdoor unit heat exchanger 43, achieving an efficient heat exchange process. In cooling heat recovery mode, the control module simultaneously opens the first electronic expansion valve 81 and the second electronic expansion valve 91, allowing the refrigerant to circulate between the water tank heat exchanger 41 and the indoor unit heat exchanger 42, while preventing refrigerant from flowing to the outdoor unit heat exchanger 43, thereby maximizing waste heat recovery efficiency and reducing energy consumption. Thus, by adjusting the valve states in different modes, especially controlling the opening and closing of the first electronic expansion valve 81 and the second electronic expansion valve 91, the impact of high-pressure refrigerant on sensitive components, such as the electronic expansion valve and solenoid valve, can be effectively reduced, extending the service life of these components and reducing system maintenance costs.

[0050] like Figure 1 As shown, the heat pump air conditioning system also includes a first fan 140, which is correspondingly arranged with the indoor unit heat exchanger 42 to dissipate heat from the indoor unit heat exchanger 42; and / or, the heat pump air conditioning system also includes a second fan 150, which is correspondingly arranged with the outdoor unit heat exchanger 43 to dissipate heat from the outdoor unit heat exchanger 43. In this way, the addition of fans enhances air circulation and promotes the heat exchange process. In air conditioning cooling or heating mode, the first fan 140 accelerates the air circulation around the indoor unit heat exchanger 42, improving its heat dissipation capacity, enabling the heat exchanger to absorb or release heat more effectively, thereby improving the cooling or heating efficiency of the air conditioner. Similarly, the second fan 150 has a similar effect on the outdoor unit heat exchanger 43, ensuring that the heat exchanger maintains good operating efficiency under various external conditions.

[0051] In this embodiment, the heat pump air conditioning system further includes a first fan 140 and a second fan 150. The first fan 140 is correspondingly arranged with the indoor unit heat exchanger 42 to dissipate heat from the indoor unit heat exchanger 42, and the second fan 150 is correspondingly arranged with the outdoor unit heat exchanger 43 to dissipate heat from the outdoor unit heat exchanger 43. Thus, by enhancing the heat dissipation of the indoor unit heat exchanger 42 and the outdoor unit heat exchanger 43, the heat pump air conditioning system can better manage heat energy and prevent overheating.

[0052] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0053] The heat pump air conditioning system includes a compressor, a three-way valve, a four-way valve, and a heat exchanger assembly. The compressor's exhaust port is connected to the inlet of the three-way valve. The first outlet of the three-way valve is connected to the first connecting pipe of the four-way valve, and the second connecting pipe of the four-way valve is connected to the compressor's air inlet. The heat exchanger assembly includes three heat exchangers: one connected to the second outlet of the three-way valve, one connected to the third connecting pipe of the four-way valve, and the other connected to the fourth connecting pipe of the four-way valve. During operation of the heat pump air conditioning system, any two heat exchangers in the heat exchanger assembly are connected. This method of using a three-way valve to replace the original two solenoid valves simplifies the heat pump air conditioning system, reduces the number of valves, lowers system costs and maintenance difficulty, and solves the problem of poor reliability of the electronic valve located at the compressor exhaust port in existing air source heat pump air conditioning systems, which affects the normal operation of the system. Meanwhile, the heat pump air conditioning system can selectively switch between three-way and four-way valves to allow the refrigerant to flow through different heat exchangers according to different needs, thereby realizing the cooling and heating functions of the air conditioner and the hot water preparation of the water heater. At the same time, in the cooling mode, it can recover waste heat to heat the water tank, which improves the functionality of the heat pump air conditioning system and meets the different usage needs of users.

[0054] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat pump air conditioning system, characterized in that, include: Compressor (10); A three-way valve (20) is connected to the discharge port (11) of the compressor (10) and the inlet (21) of the three-way valve (20); The four-way valve (30) has its first outlet (22) connected to the first connecting pipe (31) of the three-way valve (20) and its second connecting pipe (32) connected to the air inlet (12) of the compressor (10). The heat exchanger assembly (40) includes three heat exchangers: one heat exchanger is connected to the second outlet of the three-way valve (20), one heat exchanger is connected to the third pipe (33) of the four-way valve (30), and the other heat exchanger is connected to the fourth pipe (34) of the four-way valve (30); wherein, during the operation of the heat pump air conditioning system, any two heat exchangers in the heat exchanger assembly (40) are connected.

2. The heat pump air conditioning system according to claim 1, characterized in that, The three heat exchangers are a water tank heat exchanger (41), an indoor unit heat exchanger (42), and an outdoor unit heat exchanger (43). The water tank heat exchanger (41) is connected to the second outlet (23) of the three-way valve (20), the indoor unit heat exchanger (42) is connected to the third connecting pipe (33) of the four-way valve (30), and the outdoor unit heat exchanger (43) is connected to the fourth connecting pipe (34) of the four-way valve (30).

3. The heat pump air conditioning system according to claim 1, characterized in that, The first connector (31) is a D connector.

4. The heat pump air conditioning system according to claim 2, characterized in that, The heat pump air conditioning system also includes: Main pipeline (50), the first end of which is connected to the water tank heat exchanger (41); The first branch pipe (60) is connected at its first end to the second end of the main pipe (50), and at its second end to the outdoor unit heat exchanger (43). The second branch pipe (70) has its first end connected to the second end of the main pipe (50) and its second end connected to the indoor unit heat exchanger (42). A first valve assembly (80) is disposed on the second branch pipe (70). The first valve assembly (80) includes a first electronic expansion valve (81) and a first capillary tube (82).

5. The heat pump air conditioning system according to claim 4, characterized in that, The heat pump air conditioning system further includes a second valve group (90) disposed on the main pipe (50), the second valve group (90) comprising: Second electronic expansion valve (91); Second capillary (92); The first check valve (93) is located along the flow direction of the medium in the main pipeline (50), and the first check valve (93) and the second capillary (92) are located on both sides of the second electronic expansion valve (91). The first one-way valve (93) is directed from the first end to the second end of the main pipeline (50).

6. The heat pump air conditioning system according to claim 5, characterized in that, The heat pump air conditioning system further includes a third valve group (100) disposed on the first branch pipe (60), the third valve group (100) comprising: Solenoid valve (110); The second check valve (120) is in the direction of conduction from the first end to the second end of the first branch pipe (60).

7. The heat pump air conditioning system according to claim 6, characterized in that, The third valve assembly (100) also includes: The third check valve (130) is connected in parallel with both the solenoid valve (110) and the second check valve (120), and the conduction direction of the third check valve (130) is from the second end to the first end of the first branch pipe (60).

8. The heat pump air conditioning system according to claim 4, characterized in that, There are at least two first capillary tubes (82), and along the flow direction of the medium in the second branch pipe (70), at least one first capillary tube (82) is located on the first side of the first electronic expansion valve (81), and at least another first capillary tube (82) is located on the second side of the first electronic expansion valve (81).

9. The heat pump air conditioning system according to claim 6, characterized in that, The second connector (32) is an S connector, the third connector (33) is an E connector, and the fourth connector (34) is a C connector. The heat pump air conditioning system also includes: The control module is electrically connected to the three-way valve (20), the four-way valve (30), the first valve group (80), the second valve group (90), and the third valve group (100); The heat pump air conditioning system has an air conditioning cooling mode. When the heat pump air conditioning system is in the air conditioning cooling mode, the control module controls the inlet (21) of the three-way valve (20) to connect with the first outlet (22) and disconnect from the second outlet, controls the D pipe of the four-way valve (30) to connect with the C pipe and the S pipe to connect with the E pipe, controls the solenoid valve (110) to be in the closed state, controls the first electronic expansion valve (81) to be in the open state and controls the second electronic expansion valve (91) to be in the closed state. The heat pump air conditioning system also has an air conditioning heating mode. When the heat pump air conditioning system is in the air conditioning heating mode, the control module controls the inlet (21) of the three-way valve (20) to connect with the first outlet (22) and disconnect from the second outlet, controls the D pipe of the four-way valve (30) to connect with the E pipe and the S pipe to connect with the C pipe, controls the solenoid valve (110) to be in the open state, controls the first electronic expansion valve (81) to be in the open state and controls the second electronic expansion valve (91) to be in the closed state. The heat pump air conditioning system also has a heat pump hot water mode. When the heat pump air conditioning system is in the heat pump hot water mode, the control module controls the inlet (21) of the three-way valve (20) to be connected to the second outlet and disconnected from the first outlet (22), controls the D pipe of the four-way valve (30) to be connected to the E pipe and the S pipe to be connected to the C pipe, controls the solenoid valve (110) to be in the open state, controls the first electronic expansion valve (81) to be in the open state and controls the second electronic expansion valve (91) to be in the closed state. The heat pump air conditioning system has a cooling and heat recovery mode. When the heat pump air conditioning system is in the cooling and heat recovery mode, the control module controls the inlet (21) of the three-way valve (20) to be connected to the second outlet and disconnected from the first outlet (22), controls the D pipe of the four-way valve (30) to be connected to the C pipe and the S pipe to be connected to the E pipe, controls the solenoid valve (110) to be in the closed state, and controls the first electronic expansion valve (81) and the second electronic expansion valve (91) to be in the open state.

10. The heat pump air conditioning system according to claim 2, characterized in that, The heat pump air conditioning system also includes: A first fan (140) is provided corresponding to the indoor unit heat exchanger (42) for dissipating heat from the indoor unit heat exchanger (42); and / or, The second fan (150) is configured corresponding to the outdoor unit heat exchanger (43) for dissipating heat from the outdoor unit heat exchanger (43).

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