Heat pump air conditioner

Abstract

The utility model relates to the technical field of heat pumps, in particular to a heat pump air conditioner. The heat pump heating system aims at solving the problems that a traditional heat pump heating system is low in energy efficiency and even cannot work at the low environment temperature. In order to achieve the purpose, the heat pump air conditioner comprises a thermo-acoustic machine provided with a hot-end heat exchanger and a cold-end heat exchanger, the hot-end heat exchanger is provided with a hot-end heat exchange channel, and the cold-end heat exchanger is provided with a cold-end heat exchange channel; the outdoor heat exchanger selectively communicates with the hot end heat exchange channel or the cold end heat exchange channel through a first pipe set. The indoor heat exchanger selectively communicates with the hot end heat exchange channel or the cold end heat exchange channel through a second pipe set. The first pump body is arranged on the first pipe group; and the second pump body is arranged on the second pipe group. The heat pump air conditioner can work efficiently and has multiple working modes, and the application scene of the air conditioner is expanded.

Description

Technical Field

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

[0002] A heat pump is a device that transfers heat energy from a low-grade heat source to a high-grade heat source, and it is a new energy technology that has attracted much attention worldwide. Heat pumps typically extract low-grade heat energy from the air, water, or soil in nature, use electricity to perform work, and then provide people with usable high-grade heat energy.

[0003] In traditional vapor compression heat pumps, as the ambient temperature decreases, the evaporation pressure of the system drops, which not only reduces heating capacity and efficiency, but can also cause the compressor's pressure ratio and exhaust temperature to exceed the limit, making the system unable to work.

[0004] Accordingly, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] To address at least one of the aforementioned problems in the prior art, namely, to solve the problem of low energy efficiency or even inoperability of traditional heat pump heating systems at low ambient temperatures, this application provides a heat pump air conditioner, which includes:

[0006] A thermoacoustic machine, the thermoacoustic machine having a hot end heat exchanger and a cold end heat exchanger, the hot end heat exchanger having a hot end heat exchange channel, and the cold end heat exchanger having a cold end heat exchange channel;

[0007] An outdoor heat exchanger is selectively connected to either the hot end heat exchange channel or the cold end heat exchange channel via a first tube group, the first tube group being filled with a first refrigerant.

[0008] An indoor heat exchanger is selectively connected to either the hot end heat exchange channel or the cold end heat exchange channel via a second tube group, the second tube group being filled with a second refrigerant.

[0009] A first pump body is disposed in the first pipe group and is used to drive the first refrigerant circulation;

[0010] The second pump body is located in the second pipe assembly and is used to drive the second refrigerant circulation.

[0011] The heat pump air conditioner of this application, by incorporating a thermoacoustic engine, utilizes the thermoacoustic effect of the engine's operation to transfer heat from the cold-end heat exchanger to the hot-end heat exchanger. Then, the cold-end and hot-end heat exchangers exchange heat with the indoor and outdoor heat exchangers respectively, displacing and utilizing the cooling and heating energy generated during the thermoacoustic engine's operation, ultimately achieving high efficiency. Furthermore, because the heat transfer process is less affected by the external ambient temperature, the heat pump air conditioner of this application has a significant advantage in operating efficiency compared to traditional vapor compression refrigeration. In addition, the arrangement of selectively connecting the outdoor heat exchanger to either the hot-end or cold-end heat exchange channel via a first pipe group, and selectively connecting the indoor heat exchanger to either the hot-end or cold-end heat exchange channel via a second pipe group, allows the heat pump air conditioner to switch operating modes, enabling it to heat the indoor space using the hot-end heat exchanger or cool it using the cold-end heat exchanger, thus expanding the application scenarios of the air conditioner. In addition, the separate hot-end heat exchange channel and cold-end heat exchange channel for the hot-end heat exchanger and the cold-end heat exchanger also makes the internal flow path structure of the thermoacoustic machine simple and the development cost low.

[0012] In the preferred technical solution of the above-mentioned heat pump air conditioner, the first pipe group includes a first main pipe, a first branch pipe, a second branch pipe and a first three-way valve. The outdoor heat exchanger and the first pump body are disposed on the first main pipe. The three ports of the first three-way valve are respectively connected to the first end of the first main pipe, the first end of the first branch pipe and the first end of the second branch pipe. The second ends of the first branch pipe and the second end of the second branch pipe are simultaneously connected to the second end of the first main pipe. Furthermore, the first branch pipe is also connected to the hot end heat exchange channel and the second branch pipe is also connected to the cold end heat exchange channel.

[0013] The above setup allows for the switching of the two heat exchange channels using a first three-way valve.

[0014] In the preferred embodiment of the above-mentioned heat pump air conditioner, the first pipe assembly includes a first main pipe, a first branch pipe, a second branch pipe, a first on / off valve, and a second on / off valve. The outdoor heat exchanger and the first pump body are disposed on the first main pipe. The first end of the first main pipe is simultaneously connected to the first end of the first branch pipe and the first end of the second branch pipe. The second end of the first main pipe is simultaneously connected to the second end of the first branch pipe and the second end of the second branch pipe. The first branch pipe is also connected to the hot end heat exchange channel, and the second branch pipe is also connected to the cold end heat exchange channel. The first on / off valve is disposed on the first branch pipe between the first end of the first main pipe and the hot end heat exchange channel, and the second on / off valve is disposed on the second branch pipe between the first end of the first main pipe and the cold end heat exchange channel.

[0015] The above setup allows for switching between the two heat exchange channels using two on / off valves.

[0016] In the preferred embodiment of the above-mentioned heat pump air conditioner, the first pipe assembly further includes a first control valve and a second control valve. The first control valve is disposed on the first branch pipe between the second end of the first main pipe and the hot end heat exchange channel, and the second control valve is disposed on the second branch pipe between the second end of the first main pipe and the cold end heat exchange channel; or

[0017] The first pipe assembly also includes a third three-way valve, the three ports of which are respectively connected to the second end of the first main pipe, the second end of the first branch pipe, and the second end of the second branch pipe.

[0018] By setting up a first control valve and a second control valve, the circulation loops of the hot-end heat exchange channel and the cold-end heat exchange channel can be made completely independent of each other, avoiding mutual interference between the refrigerants. By setting up a third three-way valve, the circulation loops of the hot-end heat exchange channel and the cold-end heat exchange channel can be made completely independent of each other, avoiding mutual interference between the refrigerants.

[0019] In the preferred embodiment of the above-mentioned heat pump air conditioner, the second pipe assembly includes a second main pipe, a third branch pipe, a fourth branch pipe, and a second three-way valve. The indoor heat exchanger and the second pump body are disposed on the second main pipe. The three ports of the second three-way valve are respectively connected to the first end of the second main pipe, the first end of the third branch pipe, and the first end of the fourth branch pipe. The second ends of the third branch pipe and the second ends of the fourth branch pipe are simultaneously connected to the second end of the second main pipe. Furthermore, the third branch pipe is also connected to the hot end heat exchange channel, and the fourth branch pipe is also connected to the cold end heat exchange channel.

[0020] The above setup allows for the switching of the two heat exchange channels using a second three-way valve.

[0021] In the preferred embodiment of the above-mentioned heat pump air conditioner, the second pipe assembly includes a second main pipe, a third branch pipe, a fourth branch pipe, a third on / off valve, and a fourth on / off valve. The indoor heat exchanger and the second pump body are disposed on the second main pipe. The first end of the second main pipe is simultaneously connected to the first end of the third branch pipe and the first end of the fourth branch pipe. The second end of the second main pipe is simultaneously connected to the second end of the third branch pipe and the second end of the fourth branch pipe. The third branch pipe is also connected to the hot end heat exchange channel, and the fourth branch pipe is also connected to the cold end heat exchange channel. The third on / off valve is disposed on the third branch pipe between the first end of the second main pipe and the hot end heat exchange channel, and the fourth on / off valve is disposed on the fourth branch pipe between the first end of the second main pipe and the cold end heat exchange channel.

[0022] The above setup allows for switching between the two heat exchange channels using two on / off valves.

[0023] In the preferred embodiment of the above-mentioned heat pump air conditioner, the second pipe assembly further includes a third control valve and a fourth control valve. The third control valve is disposed on the third branch pipe between the second end of the second main pipe and the hot end heat exchange channel, and the fourth control valve is disposed on the fourth branch pipe between the second end of the second main pipe and the cold end heat exchange channel; or

[0024] The second pipe assembly also includes a fourth three-way valve, the three ports of which are respectively connected to the second end of the second main pipe, the second end of the third branch pipe and the second end of the fourth branch pipe.

[0025] By setting up the third and fourth control valves, the circulation loops of the hot-end heat exchange channel and the cold-end heat exchange channel can be made completely independent of each other, avoiding mutual interference between the refrigerants. Similarly, by setting up the fourth three-way valve, the circulation loops of the hot-end heat exchange channel and the cold-end heat exchange channel can be made completely independent of each other, again avoiding mutual interference between the refrigerants.

[0026] In the preferred embodiment of the above-mentioned heat pump air conditioner, the outdoor heat exchanger is an air-cooled heat exchanger, and the heat pump air conditioner further includes a first fan, which is correspondingly arranged with the indoor heat exchanger; or

[0027] The outdoor heat exchanger is a liquid-cooled heat exchanger, which has a liquid-cooled inlet and a liquid-cooled outlet, and is configured to be circulated with a liquid-cooling source through the liquid-cooled inlet and the liquid-cooled outlet.

[0028] The outdoor heat exchanger is an air-cooled heat exchanger, which enables heat exchange between the refrigerant and the environment. The outdoor heat exchanger is also a liquid-cooled heat exchanger, which can utilize energy sources of other grades (such as water) to achieve heat exchange with the refrigerant.

[0029] In the preferred technical solution of the above-mentioned heat pump air conditioner, the indoor heat exchanger is an air-cooled heat exchanger, and the heat pump air conditioner also includes a second fan, which is configured correspondingly to the indoor heat exchanger.

[0030] The indoor heat exchanger is an air-cooled heat exchanger, which can exchange heat with the environment, thereby achieving temperature control of the environment.

[0031] In the preferred embodiment of the above-mentioned heat pump air conditioner, the thermoacoustic engine is a free-piston Stirling thermoacoustic engine or a resonant tube thermoacoustic engine; and / or

[0032] The first refrigerant and the second refrigerant are the same refrigerant; and / or

[0033] The freezing points of both the first and second refrigerants are less than or equal to 0°C.

[0034] Using the same refrigerant for both the first and second refrigerants can reduce the impact of mixing different refrigerants on heat exchange efficiency.

[0035] In the preferred embodiment of the above-mentioned heat pump air conditioner, the thermoacoustic engine includes two thermoacoustic units facing each other. Each thermoacoustic unit includes a compression section and a heat exchange section. Each heat exchange section includes a hot-end heat exchanger, a regenerator, and a cold-end heat exchanger. The outdoor heat exchanger is selectively connected to two hot-end heat exchange channels or two cold-end heat exchange channels through a first pipe group. The indoor heat exchanger is connected to two hot-end heat exchange channels or two cold-end heat exchange channels through a second pipe group.

[0036] By setting up two thermoacoustic units in a thermoacoustic machine, not only can the cooling and heating capacity be doubled, but also the problem of high vibration and noise caused by a single thermoacoustic unit can be overcome by placing the two thermoacoustic units opposite each other.

[0037] In the preferred embodiment of the above-mentioned heat pump air conditioner, the two thermoacoustic units are disposed in the same housing, and the two heat exchange sections are connected to each other or separated by a partition; and / or

[0038] The two cold-end heat exchangers are positioned opposite each other.

[0039] By placing two thermoacoustic units within the same housing and separating the heat exchange sections with a partition, the manufacturing process can be simplified, eliminating the need for specific design modifications to the housing's interior. Furthermore, the two heat exchange sections are interconnected, resulting in lower material costs, and the integrated design offers higher reliability and better heat exchange performance.

[0040] Solution 1. A heat pump air conditioner, characterized in that the heat pump air conditioner comprises:

[0041] A thermoacoustic machine, the thermoacoustic machine having a hot end heat exchanger and a cold end heat exchanger, the hot end heat exchanger having a hot end heat exchange channel, and the cold end heat exchanger having a cold end heat exchange channel;

[0042] An outdoor heat exchanger is selectively connected to either the hot end heat exchange channel or the cold end heat exchange channel via a first tube group, the first tube group being filled with a first refrigerant.

[0043] An indoor heat exchanger is selectively connected to either the hot end heat exchange channel or the cold end heat exchange channel via a second tube group, the second tube group being filled with a second refrigerant.

[0044] A first pump body is disposed in the first pipe group and is used to drive the first refrigerant circulation;

[0045] The second pump body is located in the second pipe assembly and is used to drive the second refrigerant circulation.

[0046] Option 2. The heat pump air conditioner according to Option 1, characterized in that the first pipe assembly includes a first main pipe, a first branch pipe, a second branch pipe and a first three-way valve, the outdoor heat exchanger and the first pump body are disposed on the first main pipe, the three ports of the first three-way valve are respectively connected to the first end of the first main pipe, the first end of the first branch pipe and the first end of the second branch pipe, the second end of the first branch pipe and the second end of the second branch pipe are simultaneously connected to the second end of the first main pipe, and the first branch pipe is also connected to the hot end heat exchange channel, and the second branch pipe is also connected to the cold end heat exchange channel.

[0047] Option 3. The heat pump air conditioner according to Option 1, characterized in that the first pipe assembly includes a first main pipe, a first branch pipe, a second branch pipe, a first on / off valve, and a second on / off valve; the outdoor heat exchanger and the first pump body are disposed on the first main pipe; the first end of the first main pipe is simultaneously connected to the first end of the first branch pipe and the first end of the second branch pipe; the second end of the first main pipe is simultaneously connected to the second end of the first branch pipe and the second end of the second branch pipe; the first branch pipe is also connected to the hot end heat exchange channel; the second branch pipe is also connected to the cold end heat exchange channel; the first on / off valve is disposed on the first branch pipe between the first end of the first main pipe and the hot end heat exchange channel; and the second on / off valve is disposed on the second branch pipe between the first end of the first main pipe and the cold end heat exchange channel.

[0048] Option 4. The heat pump air conditioner according to Option 2 or 3, characterized in that the first pipe assembly further includes a first control valve and a second control valve, the first control valve being disposed on the first branch pipe between the second end of the first main pipe and the hot end heat exchange channel, and the second control valve being disposed on the second branch pipe between the second end of the first main pipe and the cold end heat exchange channel; or

[0049] The first pipe assembly also includes a third three-way valve, the three ports of which are respectively connected to the second end of the first main pipe, the second end of the first branch pipe, and the second end of the second branch pipe.

[0050] Option 5. The heat pump air conditioner according to Option 1, characterized in that the second pipe assembly includes a second main pipe, a third branch pipe, a fourth branch pipe, and a second three-way valve; the indoor heat exchanger and the second pump body are disposed on the second main pipe; the three ports of the second three-way valve are respectively connected to the first end of the second main pipe, the first end of the third branch pipe, and the first end of the fourth branch pipe; the second ends of the third branch pipe and the second ends of the fourth branch pipe are simultaneously connected to the second end of the second main pipe; and the third branch pipe is also connected to the hot end heat exchange channel, and the fourth branch pipe is also connected to the cold end heat exchange channel.

[0051] Option 6. The heat pump air conditioner according to Option 1, characterized in that the second pipe assembly includes a second main pipe, a third branch pipe, a fourth branch pipe, a third on / off valve, and a fourth on / off valve; the indoor heat exchanger and the second pump body are disposed on the second main pipe; the first end of the second main pipe is simultaneously connected to the first end of the third branch pipe and the first end of the fourth branch pipe; the second end of the second main pipe is simultaneously connected to the second end of the third branch pipe and the second end of the fourth branch pipe; the third branch pipe is also connected to the hot end heat exchange channel; the fourth branch pipe is also connected to the cold end heat exchange channel; the third on / off valve is disposed on the third branch pipe between the first end of the second main pipe and the hot end heat exchange channel; and the fourth on / off valve is disposed on the fourth branch pipe between the first end of the second main pipe and the cold end heat exchange channel.

[0052] Option 7. The heat pump air conditioner according to Option 5 or 6, characterized in that the second pipe assembly further includes a third control valve and a fourth control valve, the third control valve being disposed on the third branch pipe between the second end of the second main pipe and the hot end heat exchange channel, and the fourth control valve being disposed on the fourth branch pipe between the second end of the second main pipe and the cold end heat exchange channel; or

[0053] The second pipe assembly also includes a fourth three-way valve, the three ports of which are respectively connected to the second end of the second main pipe, the second end of the third branch pipe and the second end of the fourth branch pipe.

[0054] Option 8. The heat pump air conditioner according to Option 1, characterized in that the outdoor heat exchanger is an air-cooled heat exchanger, and the heat pump air conditioner further includes a first fan, the first fan being correspondingly arranged with the indoor heat exchanger; or

[0055] The outdoor heat exchanger is a liquid-cooled heat exchanger, which has a liquid-cooled inlet and a liquid-cooled outlet, and is configured to be circulated with a liquid-cooling source through the liquid-cooled inlet and the liquid-cooled outlet.

[0056] Option 9. The heat pump air conditioner according to Option 1, characterized in that the indoor heat exchanger is an air-cooled heat exchanger, and the heat pump air conditioner further includes a second fan, the second fan being configured corresponding to the indoor heat exchanger.

[0057] Option 10. The heat pump air conditioner according to Option 1, characterized in that the thermoacoustic engine is a free-piston Stirling thermoacoustic engine or a resonant tube thermoacoustic engine; and / or

[0058] The first refrigerant and the second refrigerant are the same refrigerant; and / or

[0059] The freezing points of both the first and second refrigerants are less than or equal to 0°C.

[0060] Option 11. The heat pump air conditioner according to Option 1, characterized in that the thermoacoustic engine includes two thermoacoustic units facing each other, each thermoacoustic unit includes a compression section and a heat exchange section, each heat exchange section includes a hot-end heat exchanger, a regenerator and a cold-end heat exchanger, the outdoor heat exchanger is selectively connected to two hot-end heat exchange channels or two cold-end heat exchange channels through a first pipe group, and the indoor heat exchanger is connected to two hot-end heat exchange channels or two cold-end heat exchange channels through a second pipe group.

[0061] Option 12. The heat pump air conditioner according to Option 11, characterized in that the two thermoacoustic units are disposed in the same housing, and the two heat exchange sections are connected to each other or separated by a partition; and / or

[0062] The two cold-end heat exchangers are positioned opposite each other. Attached Figure Description

[0063] The present application will now be described with reference to the accompanying drawings. In the drawings:

[0064] Figure 1 This is a system diagram of a heat pump air conditioner according to the first embodiment of this application;

[0065] Figure 2 This is a system diagram of a heat pump air conditioner according to the second embodiment of this application;

[0066] Figure 3 This is a schematic diagram of the thermoacoustic motor of a heat pump air conditioner according to the second embodiment of this application.

[0067] List of reference numerals

[0068] 1. Thermoacoustic unit; 11. Hot-end heat exchanger; 12. Cold-end heat exchanger; 13. Regenerator; 14. Shell; 15. Compression section; 16. Baffle; 21. Outdoor heat exchanger; 22. Indoor heat exchanger; 31. First fan; 32. Second fan; 411. First main pipe; 412. First branch pipe; 413. Second branch pipe; 414. First three-way valve; 415. First control valve; 416. Second control valve; 421. Second main pipe; 422. Third branch pipe; 423. Fourth branch pipe; 424. Second three-way valve; 425. Third control valve; 426. Fourth control valve; 51. First pump body; 52. Second pump body. Detailed Implementation

[0069] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. For example, although the following embodiments are described in conjunction with household air conditioners, this is not intended to limit the scope of protection of this application. Those skilled in the art can apply this application to other application scenarios without departing from the principles of this application. For example, the heat pump air conditioner of this application is also applicable to parking air conditioners, commercial air conditioners, and other application scenarios.

[0070] It should be noted that in the description of this application, terms such as "upper" and "lower" indicating direction or positional relationships are based on the direction or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0071] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0072] First refer to Figure 1 This paper provides a brief introduction to the heat pump air conditioner of this application.

[0073] like Figure 1 As shown, to address the problem of low energy efficiency or even inoperability of traditional heat pump heating systems at low ambient temperatures, the heat pump air conditioner of this application includes a thermoacoustic unit 1, an outdoor heat exchanger 21, an indoor heat exchanger 22, a first pump body 51, and a second pump body 52. ​​The thermoacoustic unit 1 has a hot-end heat exchanger 11 and a cold-end heat exchanger 12. The hot-end heat exchanger 11 has a hot-end heat exchange channel, and the cold-end heat exchanger 12 has a cold-end heat exchange channel. The outdoor heat exchanger 21 is selectively connected to either the hot-end or cold-end heat exchange channel via a first pipe assembly (not shown in the figure), which is filled with a first refrigerant. The indoor heat exchanger 22 is selectively connected to either the hot-end or cold-end heat exchange channel via a second pipe assembly (not shown in the figure), which is filled with a second refrigerant. The first pump body 51 is disposed in the first pipe assembly and is used to drive the circulation of the first refrigerant. The second pump body 52 is disposed in the second pipe assembly and is used to drive the circulation of the second refrigerant.

[0074] In one application, the outdoor heat exchanger 21 is connected to the hot-end heat exchange channel via a first pipe assembly, and the indoor heat exchanger 22 is connected to the cold-end heat exchange channel via a second pipe assembly. The thermoacoustic engine 1 starts operating, utilizing the thermoacoustic effect to generate cooling and heating in the cold-end heat exchanger 12 and the hot-end heat exchanger 11, respectively. The heat from the hot-end heat exchanger 11 is transferred to the outdoor heat exchanger 21 through a first refrigerant, and then discharged through the outdoor heat exchanger 21, or through heat exchange between the outdoor heat exchanger 21 and the environment. Similarly, the cooling capacity of the cold-end heat exchanger 12 is transferred to the indoor heat exchanger 22 through a second refrigerant, and then discharged through the indoor heat exchanger 22, or through heat exchange between the indoor heat exchanger 22 and the indoor environment, thus providing indoor cooling.

[0075] In another application, the outdoor heat exchanger 21 is connected to the cold-end heat exchange channel via a first pipe assembly, and the indoor heat exchanger 22 is connected to the hot-end heat exchange channel via a second pipe assembly. The thermoacoustic engine 1 starts operating, utilizing the thermoacoustic effect to generate cooling and heating in the cold-end heat exchanger 12 and the hot-end heat exchanger 11, respectively. The cooling energy from the cold-end heat exchanger 12 is transferred to the outdoor heat exchanger 21 through heat exchange with the first refrigerant, and then discharged through the outdoor heat exchanger 21, for example, through heat exchange between the outdoor heat exchanger 21 and the environment. Similarly, the heating energy from the hot-end heat exchanger 11 is transferred to the indoor heat exchanger 22 through heat exchange with the indoor environment, thus providing indoor heating.

[0076] The heat pump air conditioner of this application, by incorporating a thermoacoustic engine 1, utilizes the thermoacoustic effect of the engine 1 during operation to transfer heat from the cold-end heat exchanger to the hot-end heat exchanger. Then, the cold-end heat exchanger 12 and the hot-end heat exchanger 11 exchange heat with the indoor heat exchanger 22 and the outdoor heat exchanger 21 respectively, displacing and utilizing the cooling and heating energy generated by the thermoacoustic engine 1, ultimately achieving high-efficiency operation. Furthermore, since the heat transfer process is less affected by the ambient temperature, the heat pump air conditioner of this application has a significant advantage in operating efficiency compared to traditional vapor compression refrigeration. In addition, the selective connection of the outdoor heat exchanger 21 to either the hot-end or cold-end heat exchange channel via a first pipe assembly, and the selective connection of the indoor heat exchanger 22 to either the hot-end or cold-end heat exchange channel via a second pipe assembly, allows for switching of the heat pump air conditioner's operating mode. It can use the hot-end heat exchanger 11 to heat the room or the cold-end heat exchanger 12 to cool the room, expanding the application scenarios of the air conditioner. In addition, the way that the hot end heat exchanger 11 and the cold end heat exchanger 12 are respectively provided with hot end heat exchange channels and cold end heat exchange channels makes the internal flow path structure of the thermoacoustic machine 1 simple and the development cost low.

[0077] The following further combines Figure 1 This paper describes a specific embodiment of the heat pump air conditioner of this application.

[0078] like Figure 1 As shown, in one specific embodiment, the heat pump air conditioner is a household air conditioner, which includes a thermoelectric motor 1, an outdoor heat exchanger 21, an indoor heat exchanger 22, a first fan 31, a second fan 32, a first pipe assembly, a second pipe assembly, a first pump body 51, and a second pump body 52.

[0079] The specific form of the thermoacoustic machine 1 is not limited in this application. It can be a free piston Stirling thermoacoustic machine or a resonant tube thermoacoustic machine. The resonant tube thermoacoustic machine can further include a traveling wave thermoacoustic machine, a standing wave thermoacoustic machine, or a traveling-standing wave thermoacoustic machine.

[0080] Whether it's a free-piston Stirling thermoacoustic engine or a resonant tube thermoacoustic engine, their basic principle is as follows: The thermoacoustic engine 1 contains a cavity for storing compressible gases such as helium or nitrogen, and it also has a special acoustic structure. A driving device (such as a linear compressor or linear motor) drives a piston to move at high speed and reciprocate, generating sound waves. When these sound waves propagate through the gas, a thermoacoustic effect is produced, causing gas molecules to undergo periodic compression and expansion. The special acoustic structure allows the sound waves to produce strong compression and expansion in specific regions. During the compression phase, collisions between gas molecules increase, converting kinetic energy into internal energy, leading to an increase in gas temperature. During the expansion phase, the gas does work, reducing internal energy and lowering temperature. The resonant tube or acoustic resonant cavity enhances the effect of the sound waves, and due to the reflection and superposition of sound waves, relatively stable compression and expansion regions are formed in specific areas, thus creating cold and hot ends within the cavity, respectively. Furthermore, by setting up a cold-end heat exchanger 12 and a hot-end heat exchanger 11 at the cold end and the hot end respectively, and setting up a regenerator between the two heat exchangers, the heat and cold energy can be exported and utilized.

[0081] The outdoor heat exchanger 21 is an air-cooled heat exchanger. Its inlet and outlet are selectively connected to either the hot-end or cold-end heat exchange channel via a first pipe assembly. A first refrigerant is filled in the first pipe assembly. A first fan 31 is positioned corresponding to the outdoor heat exchanger 21. When the first fan 31 starts, it draws surrounding outdoor air through the outdoor heat exchanger 21, exchanging heat with the first refrigerant within it. A first pump body 51 is located in the first pipe assembly. When the first pump body 51 starts, it circulates the first refrigerant within the first pipe assembly.

[0082] The indoor heat exchanger 22 is an air-cooled heat exchanger. The inlet and outlet of the air-cooled heat exchanger are selectively connected to either the hot-end or cold-end heat exchange channel via a second pipe assembly. The second refrigerant is filled in the second pipe assembly. A second fan 32 is installed corresponding to the indoor heat exchanger 22. When the second fan 32 starts, it drives the surrounding indoor air to flow through the indoor heat exchanger 22, exchanging heat with the second refrigerant inside the indoor heat exchanger 22. A second pump body 52 is installed in the second pipe assembly. When the second pump body 52 starts, it drives the second refrigerant to circulate within the second pipe assembly. In this application, the first and second refrigerants are preferably the same refrigerant. Furthermore, the first refrigerant is selected from those with a freezing point of 0°C or less, and more preferably from those with a freezing point of -40°C or less, such as brine, ethylene glycol, methanol, ethanol, or a mixture of ethylene glycol, methanol, ethanol, and water.

[0083] The first pipe assembly includes a first main pipe 411, a first branch pipe 412, a second branch pipe 413, a first three-way valve 414, a first control valve 415, and a second control valve 416. The outdoor heat exchanger 21 and the first pump body 51 are located on the first main pipe 411. The three ports of the first three-way valve 414 are respectively connected to the first end of the first main pipe 411. Figure 1 (as shown at the lower end), the first end of the first branch pipe 412 ( Figure 1 The lower end shown) and the first end of the second branch pipe 413 (shown below) Figure 1 The lower end shown is connected, and the second end of the first branch pipe 412 ( Figure 1 The upper end shown) and the second end of the second branch pipe 413 ( Figure 1 The upper end shown) is simultaneously connected to the second end of the first main tube 411 ( Figure 1 The upper end of the first branch pipe 411 is connected to the hot-end heat exchange channel, and the second branch pipe 413 is connected to the cold-end heat exchange channel. The first three-way valve 414 is preferably an electromagnetic three-way valve, which can achieve independent connection between the first end of the first main pipe 411 and the first end of the first branch pipe 412, or independent connection between the first main pipe 411 and the first end of the second branch pipe 413. It should be noted that the connection between the first branch pipe 412 and the hot-end heat exchange channel means that the hot-end heat exchange channel is connected between the two ends of the first branch pipe 412, that is, the hot-end heat exchange channel cuts the first branch pipe 412 into two parts, and the two ends of the hot-end heat exchange channel are respectively connected to the two inner ends formed after the first branch pipe 412 is cut off. The second branch pipe 413 is similar and will not be described further.

[0084] A first control valve 415 is disposed on a first branch pipe 412 between the second end of the first main pipe 411 and the hot-end heat exchange channel, and a second control valve 416 is disposed on a second branch pipe 413 between the second end of the first main pipe 411 and the cold-end heat exchange channel. Preferably, the first control valve 415 and the second control valve 416 are solenoid valves. The first control valve 415 can control whether the second end of the first main pipe 411 is connected to the first branch pipe 412, and the second control valve 416 can control whether the second end of the first main pipe 411 is connected to the second branch pipe 413.

[0085] The second pipe assembly includes a second main pipe 421, a third branch pipe 422, a fourth branch pipe 423, a second three-way valve 424, a third control valve 425, and a fourth control valve 426. The indoor heat exchanger 22 and the second pump body 52 are located on the second main pipe 421. The three ports of the second three-way valve 424 are respectively connected to the first end of the second main pipe 421. Figure 1 The upper end shown), the first end of the third branch pipe 422 ( Figure 1 The upper end shown) and the first end of the fourth branch pipe 423 ( Figure 1 The upper end shown is connected, and the second end of the third branch pipe 422 ( Figure 1 The lower end shown) and the second end of the fourth branch pipe 423 ( Figure 1 The lower end shown) is simultaneously connected to the second end of the second main tube 421 ( Figure 1 The lower end of the pipe is connected to the first branch pipe 421, and the third branch pipe 422 is also connected to the hot end heat exchange channel, and the fourth branch pipe 423 is also connected to the cold end heat exchange channel. The second three-way valve 424 is preferably an electromagnetic three-way valve, which can achieve independent connection between the first end of the second main pipe 421 and the first end of the third branch pipe 422, or independent connection between the second main pipe 421 and the first end of the fourth branch pipe 423. Here, the connection between the third branch pipe 422 and the hot end heat exchange channel, and the connection between the fourth branch pipe 423 and the cold end heat exchange channel, are similar to the aforementioned connection methods and will not be repeated here. Furthermore, more preferably, to save on piping and simplify the system structure, in this application, the first branch pipe 412 and the third branch pipe 422 share a middle section, and the second branch pipe 413 and the fourth branch pipe 423 share a middle section.

[0086] The third control valve 425 is disposed on the third branch pipe 422 between the second end of the second main pipe 421 and the hot end heat exchange channel, and the fourth control valve 426 is disposed on the fourth branch pipe 423 between the second end of the second main pipe 421 and the cold end heat exchange channel. Preferably, the third control valve 425 and the fourth control valve 426 are solenoid valves. The third control valve 425 can control whether the second end of the second main pipe 421 is connected to the third branch pipe 422, and the fourth control valve 426 can control whether the second end of the second main pipe 421 is connected to the fourth branch pipe 423. In addition, when the first branch pipe 412 and the third branch pipe 422 share a section in the middle, and the second branch pipe 413 and the fourth branch pipe 423 share a section in the middle, the first control valve 415, the second control valve 416, the third control valve 425 and the fourth control valve 426 are respectively disposed on the non-overlapping parts of the corresponding branch pipes.

[0087] The following is combined with Figure 1 The working principle of the aforementioned household air conditioner described in this application will be briefly introduced. For example... Figure 1 As shown, in one embodiment, when operating in cooling mode, the first three-way valve 414 switches to connect the first main pipe 411 and the first branch pipe 412, the second three-way valve 424 switches to connect the second main pipe 421 and the fourth branch pipe 423, the first control valve 415 opens, the second control valve 416 closes, the third control valve 425 closes, and the fourth control valve 426 opens. Thermoacoustic machine 1, first fan 31, second fan 32, first pump body 51, and second pump body 52 start operation. During the operation of thermoacoustic machine 1, heat and cold are generated through the thermoacoustic effect, and the heat and cold are absorbed by the hot-end heat exchanger 11 and the cold-end heat exchanger 12, respectively. The first pump body 51 drives the first refrigerant to circulate between the hot-end heat exchanger 11 and the outdoor heat exchanger 21. When the first refrigerant passes through the hot-end heat exchanger 11, it exchanges heat with the hot-end heat exchanger 11, absorbing heat from the hot-end heat exchanger 11 and rising in temperature. As the first refrigerant continues to flow through the outdoor heat exchanger 21, it exchanges heat with the outdoor airflow, absorbing the cold air and cooling down, thus completing the cycle. The second pump 52 drives the second refrigerant to circulate between the cold-end heat exchanger 12 and the indoor heat exchanger 22. When the second refrigerant passes through the cold-end heat exchanger 12, it exchanges heat with the cold-end heat exchanger 12, absorbing the cold air and cooling down. As the second refrigerant continues to flow through the indoor heat exchanger 22, it exchanges heat with the indoor airflow, absorbing heat from the indoor air and heating up, while the corresponding indoor airflow temperature decreases, thus achieving indoor cooling.

[0088] When operating in heating mode, the first three-way valve 414 switches to connect the first main pipe 411 and the second branch pipe 413, the second three-way valve 424 switches to connect the second main pipe 421 and the third branch pipe 422, the first control valve 415 is closed, the second control valve 416 is open, the third control valve 425 is open, and the fourth control valve 426 is closed. Thermoacoustic machine 1, first fan 31, second fan 32, first pump body 51, and second pump body 52 start operation. During the operation of thermoacoustic machine 1, heat and cold are generated through the thermoacoustic effect, and the heat and cold are absorbed by the hot-end heat exchanger 11 and the cold-end heat exchanger 12, respectively. The first pump body 51 drives the first refrigerant to circulate between the cold-end heat exchanger 12 and the outdoor heat exchanger 21. When the first refrigerant passes through the cold-end heat exchanger 12, it exchanges heat with the cold-end heat exchanger 12, absorbing the cold in the cold-end heat exchanger 12 and cooling down. As the first refrigerant continues to flow through the outdoor heat exchanger 21, it exchanges heat with the outdoor airflow, absorbing heat from the outdoor environment and thus increasing its temperature, and this cycle continues. The second pump 52 drives the second refrigerant to circulate between the hot-end heat exchanger 11 and the indoor heat exchanger 22. When the second refrigerant passes through the hot-end heat exchanger 11, it exchanges heat with the hot-end heat exchanger 11, absorbing heat from the hot-end heat exchanger 11 and thus increasing its temperature. As the second refrigerant continues to flow through the indoor heat exchanger 22, it exchanges heat with the indoor airflow, absorbing the cold air from the indoor environment and thus decreasing its temperature. Consequently, the temperature of the indoor airflow increases, achieving indoor heating.

[0089] The above configuration allows for switching between the two heat exchange channels using a first three-way valve 414 and a second three-way valve 424. By setting the first control valve 415 and the second control valve 416, the circulation loops of the hot-end and cold-end heat exchange channels can be made completely independent, avoiding interference between the refrigerants. Similarly, by setting the third control valve 425 and the fourth control valve 426, the circulation loops of the hot-end and cold-end heat exchange channels can be made completely independent, again preventing interference between the refrigerants. The outdoor heat exchanger 21 is an air-cooled heat exchanger, enabling heat exchange between the refrigerant and the environment. The indoor heat exchanger 22 is an air-cooled heat exchanger, enabling heat exchange with the environment, thus allowing for temperature control. Using the same refrigerant for both the first and second refrigerants reduces the impact of mixing different refrigerants on heat exchange efficiency. The freezing point of the first refrigerant is less than or equal to -40℃, which helps improve the operational stability of the heat pump under low or even ultra-low outdoor temperatures.

[0090] The following reference Figure 2 and Figure 3 The second embodiment of the heat pump air conditioner of this application will be briefly described.

[0091] like Figure 2 and Figure 3As shown, based on the first embodiment, this embodiment adjusts the structure of the thermoacoustic machine 1. Specifically, the thermoacoustic machine 1 includes two thermoacoustic units facing each other, which are disposed within the same housing 14, and each thermoacoustic unit includes a compression section 15 and a heat exchange section. The compression section 15 is a linear compressor, which includes electromagnetic components, a power piston, a spring, an exhaust fan, etc. The heat exchange section includes a hot-end heat exchanger 11, a regenerator 13, and a cold-end heat exchanger 12. An expansion chamber and a compression chamber are formed within the housing 14. The cold-end heat exchanger 12 is located in the expansion chamber, the hot-end heat exchanger 11 is located in the compression chamber, and the regenerator 13 is located between the cold-end heat exchanger 12 and the hot-end heat exchanger 11. Further, as... Figure 3 As shown, in this application, the two cold-end heat exchangers 12 are positioned opposite each other (i.e., the two cold-end heat exchangers 12 are close to each other and face each other), and a partition 16 is provided between the two cold-end heat exchangers 12 to separate the two thermoacoustic units. (Return to Reference) Figure 2 The outdoor heat exchanger 21 is selectively connected to two hot-end heat exchange channels or two cold-end heat exchange channels via a first pipe group, and the indoor heat exchanger 22 is connected to two hot-end heat exchange channels or two cold-end heat exchange channels via a second pipe group. Specifically, the outdoor heat exchanger 21 is installed on the first main pipe 411, one end of the first main pipe 411 is connected to two hot-end heat exchange channels via a first branch pipe 412, and is connected to two cold-end heat exchange channels via a second branch pipe 413. The first branch pipe 412 and the second branch pipe 413 are connected to the two ports of the first three-way valve 414. The indoor heat exchanger 22 is installed on the second main pipe 421. One end of the second main pipe 421 is connected to two hot-end heat exchange channels via a third branch pipe 422, and to two cold-end heat exchange channels via a fourth branch pipe 423. The third branch pipe 422 and the fourth branch pipe 423 are connected to the two ports of the second three-way valve 424. The first branch pipe 412 and the third branch pipe 422 share a section of pipe passing through the hot-end heat exchange channels, and the second branch pipe 413 and the fourth branch pipe 423 share a section of pipe passing through the cold-end heat exchange channels. At this time, the two hot-end heat exchange channels and the two cold-end heat exchange channels form a "parallel" structure similar to that in electrical circuits.

[0092] Thus, by setting two thermoacoustic units in thermoacoustic unit 1, not only can the cooling and heating capacity be doubled, but also the problem of high vibration and noise caused by a single thermoacoustic unit can be overcome by placing the two thermoacoustic units opposite each other. Placing the two thermoacoustic units within the same housing 14 and separating the heat exchange sections by a partition 16 simplifies the manufacturing process, eliminating the need for specific design of the interior of housing 14. The specific working principle of the above embodiment can be referred to in the first embodiment, and will not be repeated here.

[0093] It should be noted that the above preferred embodiments are merely illustrative of the principles of this application and are not intended to limit the scope of protection of this application. Without departing from the principles of this application, those skilled in the art can adjust the above settings to make this application applicable to more specific application scenarios.

[0094] For example, in an alternative embodiment, although the outdoor heat exchanger 21 is described using an air-cooled heat exchanger as an example, the specific form of the outdoor heat exchanger 21 is not unique, and those skilled in the art can adjust it. For example, the outdoor heat exchanger 21 can also be a liquid-cooled heat exchanger, which has a liquid-cooled inlet and a liquid-cooled outlet. The liquid-cooled heat exchanger is configured to circulate with a liquid-cooling source through the liquid-cooled inlet and outlet, in which case the first fan 31 can be omitted. For example, the liquid-cooled heat exchanger can exchange heat with groundwater or cooling water in a cold water tank. Since the outdoor heat exchanger 21 is a liquid-cooled heat exchanger, it can utilize energy of other grades (such as water) to achieve heat exchange of the refrigerant.

[0095] For example, in another alternative embodiment, although the indoor heat exchanger 22 is described in conjunction with an air-cooled heat exchanger, the specific form of the indoor heat exchanger 22 is not unique, and those skilled in the art can make adjustments. For example, the indoor heat exchanger 22 can also be a liquid-cooled heat exchanger, which indirectly transfers heat or cold to the room for heat exchange with the indoor ambient air.

[0096] For example, in another alternative embodiment, although the above embodiment is described using the example of both the first and second refrigerants having a freezing point of less than or equal to -40°C, the specific selection of the first and second refrigerants is not fixed, and those skilled in the art can make the selection based on the specific application scenario. For example, in areas with high outdoor ambient temperatures, water can also be selected as the first and second refrigerants, or other refrigerants with a freezing point of less than or equal to 0°C can be used. Furthermore, the first and second refrigerants can also be different types of refrigerants, as long as they can be mixed and the effect of mixing on the heat exchange effect is minimal.

[0097] For example, in another alternative implementation, the specific composition of the first tube group is not unique. Those skilled in the art can adjust the specific form of the first tube group, as long as the adjusted technical solution can achieve the condition of selective connection between the outdoor heat exchanger 21 and the hot end heat exchange channel or the cold end heat exchange channel. For example, the first pipe assembly may further include a first main pipe 411, a first branch pipe 412, a second branch pipe 413, a first on-off valve, and a second on-off valve. The outdoor heat exchanger 21 and the first pump body 51 are disposed on the first main pipe 411. The first end of the first main pipe 411 is simultaneously connected to the first end of the first branch pipe 412 and the first end of the second branch pipe 413. The second end of the first main pipe 411 is simultaneously connected to the second end of the first branch pipe 412 and the second end of the second branch pipe 413. The first branch pipe 412 is also connected to the hot-end heat exchange channel, and the second branch pipe 413 is also connected to the cold-end heat exchange channel. The first on-off valve is disposed on the first branch pipe 412 between the first end of the first main pipe 411 and the hot-end heat exchange channel, and the second on-off valve is disposed on the second branch pipe 413 between the first end of the first main pipe 411 and the cold-end heat exchange channel. This configuration allows for the switching of the two heat exchange channels using two on-off valves.

[0098] For example, in another alternative embodiment, the specific composition of the second tube group is not unique. Those skilled in the art can adjust the specific form of the second tube group, as long as the adjusted technical solution can achieve the condition of selective connection between the indoor heat exchanger 22 and the hot end heat exchange channel or the cold end heat exchange channel. For example, the second pipe assembly may further include a second main pipe 421, a third branch pipe 422, a fourth branch pipe 423, a third on-off valve, and a fourth on-off valve. The indoor heat exchanger 22 and the second pump body 52 are disposed on the second main pipe 421. The first end of the second main pipe 421 is connected to the first ends of both the third branch pipe 422 and the fourth branch pipe 423. The second end of the second main pipe 421 is connected to the second ends of both the third branch pipe 422 and the fourth branch pipe 423. The third branch pipe 422 is also connected to the hot-end heat exchange channel, and the fourth branch pipe 423 is also connected to the cold-end heat exchange channel. The third on-off valve is disposed on the third branch pipe 422 between the first end of the second main pipe 421 and the hot-end heat exchange channel, and the fourth on-off valve is disposed on the fourth branch pipe 423 between the first end of the second main pipe 421 and the cold-end heat exchange channel. This configuration allows for the switching of the two heat exchange channels using two on-off valves.

[0099] For example, in another alternative embodiment, although the first control valve 415, the second control valve 416, the third control valve 425, and the fourth control valve 426 are all described using a solenoid valve as an example, the above arrangement is merely exemplary. In other embodiments, one or more of the above four control valves can be replaced by other valves, such as a check valve, an electric butterfly valve, or an electric ball valve. Of course, valves with adjustable opening can also be used to achieve adjustable refrigerant flow. Furthermore, the above four control valves may not be provided at all.

[0100] For example, in another alternative embodiment, the first control valve 415 and the second control valve 416 can be replaced with three-way valves. Specifically, the first control valve 415 and the second control valve 416 can be replaced with a third three-way valve, whose three ports are respectively connected to the second end of the first main pipe 411, the second end of the first branch pipe 412, and the second end of the second branch pipe 413. By setting the third three-way valve, the circulation loops of the hot-end heat exchange channel and the cold-end heat exchange channel can be made completely independent of each other, avoiding mutual interference between the refrigerants.

[0101] For example, in another alternative embodiment, the third control valve 425 and the fourth control valve 426 can also be replaced with three-way valves. Specifically, the third control valve 425 and the fourth control valve 426 can be replaced with a fourth three-way valve, whose three ports are respectively connected to the second end of the second main pipe 421, the second end of the third branch pipe 422, and the second end of the fourth branch pipe 423. By setting the fourth three-way valve, the circulation loops containing the hot-end heat exchange channel and the cold-end heat exchange channel can be made completely independent of each other, avoiding mutual interference between the refrigerants.

[0102] For example, in another alternative embodiment, although the above embodiment is described in conjunction with the first three-way valve 414 and the second three-way valve 424 as electromagnetic three-way valves, the specific configuration of the first three-way valve 414 and the second three-way valve 424 is not unique, and those skilled in the art can choose according to specific application scenarios. For example, one or both of the first three-way valve 414 and the second three-way valve 424 can also be selected as pneumatic three-way valves, hydraulic three-way valves, etc.

[0103] For example, in another alternative embodiment, the first branch pipe 412 and the third branch pipe 422 share a section in the middle, and the second branch pipe 413 and the fourth branch pipe 423 share a section in the middle. This is only one possible embodiment. In other embodiments, those skilled in the art can also adjust the above arrangement to split the shared part of the first branch pipe 412 and the third branch pipe 422 into two independent pipe sections, and split the shared part of the second branch pipe 413 and the fourth branch pipe 423 into two independent pipe sections.

[0104] For example, in another alternative embodiment, although the second embodiment described above is based on the example of two thermoacoustic units being arranged in the same housing 14, this is only a preferred embodiment. In other embodiments, two separate thermoacoustic units can also be arranged opposite each other.

[0105] For example, in another alternative embodiment, although the heat exchange sections of the two thermoacoustic units in the second embodiment described above are separated by a partition 16, this is only one possible method. In another embodiment, the two heat exchange sections can also be connected to each other. In this case, the two cold-end heat exchangers 12 are located in the same expansion chamber. In this way, the two heat exchange sections are connected to each other, the material cost is low, and the integrated design has higher reliability and better heat exchange effect.

[0106] For example, in another alternative implementation, although the second implementation described above is based on the example of two cold-end heat exchangers 12 facing each other, this is only one possible implementation. The specific arrangement depends on the specific form of the heat exchange unit. For example, when the hot-end heat exchanger 11 is located at the outermost edge of the thermoacoustic unit, the two hot-end heat exchangers 11 can also be arranged to face each other.

[0107] For example, in another alternative embodiment, the specific form of the compression unit 15 is not limited in this application. In addition to a linear compressor, it can be any other type of compressor, such as a crank-connecting rod compressor.

[0108] For example, in another alternative embodiment, although the second embodiment described above is illustrated by setting both the two hot-end heat exchange channels and the two cold-end heat exchange channels in a "parallel" manner, this is merely used to illustrate the principle of this application and is not intended to limit the scope of protection of this application. Those skilled in the art will understand that in other embodiments, the connection method of the heat exchange channels can also be changed so that this application can be applied to more specific application scenarios. For example, the cold-end heat exchange channels and the hot-end heat exchange channels can be connected in a "series" manner. For instance, the first refrigerant passes through two hot-end heat exchange channels or two cold-end heat exchange channels before exchanging heat with the outdoor heat exchanger 21, and the second refrigerant passes through two hot-end heat exchange channels or two cold-end heat exchange channels before entering the indoor heat exchanger 22 for heat exchange.

[0109] For example, in another alternative embodiment, although the above embodiments are described in conjunction with household air conditioners, this is not intended to limit the scope of protection of this application. Without departing from the principles of this application, those skilled in the art can apply this application to other application scenarios. For example, the heat pump air conditioner of this application is also applicable to application scenarios such as parking air conditioners and commercial air conditioners.

[0110] Of course, the alternative implementation methods described above, as well as the alternative implementation methods and preferred implementation methods, can be used in combination to create new implementation methods that are suitable for more specific application scenarios.

[0111] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0112] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A heat pump air conditioner, characterized in that, The heat pump air conditioner includes: A thermoacoustic machine, the thermoacoustic machine having a hot end heat exchanger and a cold end heat exchanger, the hot end heat exchanger having a hot end heat exchange channel, and the cold end heat exchanger having a cold end heat exchange channel; An outdoor heat exchanger is selectively connected to either the hot end heat exchange channel or the cold end heat exchange channel via a first tube group, the first tube group being filled with a first refrigerant. An indoor heat exchanger is selectively connected to either the hot end heat exchange channel or the cold end heat exchange channel via a second tube group, the second tube group being filled with a second refrigerant. A first pump body is disposed in the first pipe group and is used to drive the first refrigerant circulation; The second pump body is located in the second pipe assembly and is used to drive the second refrigerant circulation.

2. The heat pump air conditioner according to claim 1, characterized in that, The first pipe assembly includes a first main pipe, a first branch pipe, a second branch pipe, and a first three-way valve. The outdoor heat exchanger and the first pump body are disposed on the first main pipe. The three ports of the first three-way valve are respectively connected to the first end of the first main pipe, the first end of the first branch pipe, and the first end of the second branch pipe. The second ends of the first branch pipe and the second branch pipe are simultaneously connected to the second end of the first main pipe. Furthermore, the first branch pipe is also connected to the hot end heat exchange channel, and the second branch pipe is also connected to the cold end heat exchange channel.

3. The heat pump air conditioner according to claim 1, characterized in that, The first pipe assembly includes a first main pipe, a first branch pipe, a second branch pipe, a first on / off valve, and a second on / off valve. The outdoor heat exchanger and the first pump body are disposed on the first main pipe. The first end of the first main pipe is simultaneously connected to the first end of the first branch pipe and the first end of the second branch pipe. The second end of the first main pipe is simultaneously connected to the second end of the first branch pipe and the second end of the second branch pipe. The first branch pipe is also connected to the hot end heat exchange channel, and the second branch pipe is also connected to the cold end heat exchange channel. The first on / off valve is disposed on the first branch pipe between the first end of the first main pipe and the hot end heat exchange channel, and the second on / off valve is disposed on the second branch pipe between the first end of the first main pipe and the cold end heat exchange channel.

4. The heat pump air conditioner according to claim 2 or 3, characterized in that, The first pipe assembly further includes a first control valve and a second control valve. The first control valve is disposed on the first branch pipe between the second end of the first main pipe and the hot end heat exchange channel, and the second control valve is disposed on the second branch pipe between the second end of the first main pipe and the cold end heat exchange channel; or The first pipe assembly also includes a third three-way valve, the three ports of which are respectively connected to the second end of the first main pipe, the second end of the first branch pipe, and the second end of the second branch pipe.

5. The heat pump air conditioner according to claim 1, characterized in that, The second pipe assembly includes a second main pipe, a third branch pipe, a fourth branch pipe, and a second three-way valve. The indoor heat exchanger and the second pump body are disposed on the second main pipe. The three ports of the second three-way valve are respectively connected to the first end of the second main pipe, the first end of the third branch pipe, and the first end of the fourth branch pipe. The second ends of the third branch pipe and the second ends of the fourth branch pipe are simultaneously connected to the second end of the second main pipe. Furthermore, the third branch pipe is also connected to the hot end heat exchange channel, and the fourth branch pipe is also connected to the cold end heat exchange channel.

6. The heat pump air conditioner according to claim 1, characterized in that, The second pipe assembly includes a second main pipe, a third branch pipe, a fourth branch pipe, a third on / off valve, and a fourth on / off valve. The indoor heat exchanger and the second pump body are disposed on the second main pipe. The first end of the second main pipe is simultaneously connected to the first end of the third branch pipe and the first end of the fourth branch pipe. The second end of the second main pipe is simultaneously connected to the second end of the third branch pipe and the second end of the fourth branch pipe. The third branch pipe is also connected to the hot end heat exchange channel, and the fourth branch pipe is also connected to the cold end heat exchange channel. The third on / off valve is disposed on the third branch pipe between the first end of the second main pipe and the hot end heat exchange channel, and the fourth on / off valve is disposed on the fourth branch pipe between the first end of the second main pipe and the cold end heat exchange channel.

7. The heat pump air conditioner according to claim 5 or 6, characterized in that, The second pipe assembly further includes a third control valve and a fourth control valve. The third control valve is disposed on the third branch pipe between the second end of the second main pipe and the hot end heat exchange channel, and the fourth control valve is disposed on the fourth branch pipe between the second end of the second main pipe and the cold end heat exchange channel; or The second pipe assembly also includes a fourth three-way valve, the three ports of which are respectively connected to the second end of the second main pipe, the second end of the third branch pipe and the second end of the fourth branch pipe.

8. The heat pump air conditioner according to claim 1, characterized in that, The outdoor heat exchanger is an air-cooled heat exchanger, and the heat pump air conditioner also includes a first fan, which is correspondingly arranged with the indoor heat exchanger; or The outdoor heat exchanger is a liquid-cooled heat exchanger, which has a liquid-cooled inlet and a liquid-cooled outlet, and is configured to be circulated with a liquid-cooling source through the liquid-cooled inlet and the liquid-cooled outlet.

9. The heat pump air conditioner according to claim 1, characterized in that, The indoor heat exchanger is an air-cooled heat exchanger, and the heat pump air conditioner also includes a second fan, which is configured corresponding to the indoor heat exchanger.

10. The heat pump air conditioner according to claim 1, characterized in that, The thermoacoustic machine is a free-piston Stirling thermoacoustic machine or a resonant tube thermoacoustic machine; and / or The first refrigerant and the second refrigerant are the same refrigerant; and / or The freezing points of both the first and second refrigerants are less than or equal to 0°C.

11. The heat pump air conditioner according to claim 1, characterized in that, The thermoacoustic machine includes two thermoacoustic units facing each other. Each thermoacoustic unit includes a compression section and a heat exchange section. Each heat exchange section includes a hot-end heat exchanger, a regenerator, and a cold-end heat exchanger. The outdoor heat exchanger is selectively connected to two hot-end heat exchange channels or two cold-end heat exchange channels through a first tube group. The indoor heat exchanger is connected to two hot-end heat exchange channels or two cold-end heat exchange channels through a second tube group.

12. The heat pump air conditioner according to claim 11, characterized in that, The two thermoacoustic units are disposed within the same housing, and the two heat exchange sections are either interconnected or separated by a partition; and / or The two cold-end heat exchangers are positioned opposite each other.

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