Heat pump system

Abstract

The present application relates to the technical field of air conditioning, in particular to a heat pump system. The present application aims to solve the problem that the application scene of the existing vapor compression heat pump is limited. For this purpose, the heat pump system of the present application comprises: a thermoacoustic engine comprising a hot-end heat exchanger and a cold-end heat exchanger; a compressor in cyclic communication with the hot-end heat exchanger; a first heat exchanger having one end in communication with the exhaust port of the compressor; a throttling element having two ends in communication with the other end of the first heat exchanger and one end of the hot-end heat exchanger, respectively; a second heat exchanger in cyclic communication with the cold-end heat exchanger through a first cold carrier pipeline; a first pump body arranged in the first cold carrier pipeline; an intermediate heat exchanger having a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path being in communication with the first refrigerant pipeline and located between the throttling element and the suction port of the compressor, and the second heat exchange flow path being in communication with the first cold carrier pipeline. The present application can realize the combination of the thermoacoustic engine and the vapor compression heat pump, and improve the scene applicability and working efficiency of the system.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically to a heat pump system. 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] Traditional vapor compression heat pumps, due to their inherent characteristics, have a narrow operating temperature range for high efficiency. Excessively high or low temperatures can lead to a decrease in the system's cooling / heating capacity and efficiency, and in severe cases, may even cause the system to shut down for protection, rendering it inoperable. Therefore, overcoming the application limitations of traditional vapor compression heat pumps has become a pressing issue for major system integrators.

[0004] Accordingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To address at least one of the aforementioned problems in the prior art, namely, to overcome the limitation of application scenarios for existing vapor compression heat pumps, this application provides a heat pump system, including a thermoacoustic engine, a compressor, a first heat exchanger, a second heat exchanger, an intermediate heat exchanger, a first pump body, and a throttling element.

[0006] The thermoacoustic machine includes a hot-end heat exchanger and a cold-end heat exchanger. The compressor is circulatedly connected to the hot-end heat exchanger through a first refrigerant pipeline. The first heat exchanger is disposed on the first refrigerant pipeline and one end is connected to the exhaust port of the compressor. The throttling element is disposed on the first refrigerant pipeline and both ends are connected to the other end of the first heat exchanger and one end of the hot-end heat exchanger, respectively. The second heat exchanger is circulatedly connected to the cold-end heat exchanger through a first cooling pipeline. The first cooling pipeline is filled with a first refrigerant. The first pump body is disposed on the first cooling pipeline. The intermediate heat exchanger has a first heat exchange flow path and a second heat exchange flow path that can exchange heat with each other. The first heat exchange flow path is connected to the first refrigerant pipeline and is located between the throttling element and the suction port of the compressor. The second heat exchange flow path is connected to the first cooling pipeline.

[0007] The heat pump system of this application, by simultaneously incorporating a compressor and a thermoacoustic engine, combines a thermoacoustic engine with a vapor compression heat pump, enhancing the system's applicability and efficiency. Specifically, by using a thermoacoustic engine, heat can be transferred from the cold-end heat exchanger to the hot-end heat exchanger within the inefficient operating temperature range of the vapor compression cycle. The cooling and heating generated during the operation of the thermoacoustic engine are then used for the vapor compression cycle and the second heat exchanger, respectively. Furthermore, since the heat transfer process is less affected by the ambient temperature, the thermoacoustic engine offers a significant efficiency advantage compared to traditional vapor compression. By incorporating an intermediate heat exchanger, heat exchange between the refrigerant and the first refrigerant can be achieved, enabling the vapor compression cycle to operate independently within its efficient operating range, thus expanding the system's applicability.

[0008] In the preferred embodiment of the above-described heat pump system, the heat pump system further includes a first bypass pipe, the two ends of which are respectively connected to the two ends of the cold-end heat exchanger. The heat pump system also includes a first valve, which is configured to selectively control the flow of the first refrigerant through the first bypass pipe or the cold-end heat exchanger; and / or

[0009] The heat pump system further includes a second bypass pipe, the two ends of which are respectively connected to the two ends of the second heat exchange flow path. The heat pump system also includes a second valve, which is configured to selectively control the flow of the first refrigerant through the second bypass pipe or the second heat exchange flow path.

[0010] By setting up a first bypass line, the flow direction of the first refrigerant can be controlled, preventing it from flowing through the hot-end heat exchanger and affecting heat exchange efficiency when the compressor is operating independently. By setting up a second bypass line, the flow direction of the first refrigerant can be controlled, preventing it from flowing through the intermediate heat exchanger and causing heat loss when the thermoacoustic machine is operating, thereby improving system operating efficiency.

[0011] In the preferred embodiment of the above-mentioned heat pump system, the heat pump system further includes a third bypass pipe, the two ends of which are respectively connected to the two ends of the hot-end heat exchanger; the heat pump system further includes a third valve, which is configured to selectively control the flow of refrigerant through the third bypass pipe or the hot-end heat exchanger; and / or

[0012] The heat pump system further includes a fourth bypass pipe, the two ends of which are respectively connected to the two ends of the first heat exchange flow path. The heat pump system also includes a fourth valve, which is configured to selectively control the refrigerant flow through the fourth bypass pipe or the first heat exchange flow path.

[0013] By installing a third bypass line, the flow of refrigerant can be controlled, preventing refrigerant from flowing through the cold-end heat exchanger and affecting heat exchange efficiency when the compressor is operating independently. By installing a fourth bypass line, the flow of refrigerant can be controlled, preventing refrigerant from flowing through the intermediate heat exchanger and causing heat loss when the thermoelectric compressor is operating, thereby improving system operating efficiency.

[0014] In the preferred embodiment of the above-mentioned heat pump system, the heat pump system further includes a first bypass pipe and a first connecting pipe. One end of the first bypass pipe is connected to a first refrigerant pipe between one end of the second heat exchanger and one end of the cold-end heat exchanger. The other end of the first bypass pipe is connected to a first refrigerant pipe between the other end of the second heat exchanger and one end of the second heat exchange flow path. One end of the first connecting pipe is connected to the first bypass pipe, thereby dividing the first bypass pipe into a first pipe segment and a second pipe segment. The other end of the first connecting pipe is connected to a first refrigerant pipe between the other end of the cold-end heat exchanger and the other end of the second heat exchange flow path. The heat pump system further includes a first valve section, which is configured to selectively control the flow of the first refrigerant through the first pipe segment and the first connecting pipe to allow the first refrigerant to bypass the cold-end heat exchanger, or through the second pipe segment and the first connecting pipe to allow the first refrigerant to bypass the second heat exchange flow path.

[0015] By setting up a first bypass pipe and a first connecting pipe, the flow direction of the first refrigerant can be controlled, allowing the system to select a suitable flow path according to the current operating state, reducing heat loss during the circulation of the first refrigerant and improving system energy efficiency.

[0016] In the preferred embodiment of the above-mentioned heat pump system, the heat pump system further includes a second bypass pipe and a second connecting pipe. One end of the second bypass pipe is connected to a first refrigerant pipe between one end of the hot-end heat exchanger and the suction port of the compressor. The other end of the second bypass pipe is connected to a first refrigerant pipe between the first heat exchange flow path and one end of the throttling element. One end of the second connecting pipe is connected to the second bypass pipe, thereby dividing the second bypass pipe into a third pipe segment and a fourth pipe segment. The other end of the second connecting pipe is connected to a first refrigerant pipe between the other end of the hot-end heat exchanger and the other end of the first heat exchange flow path. The heat pump system further includes a second valve section, which is configured to selectively control the refrigerant flow through the third pipe segment and the second connecting pipe to allow the first refrigerant to bypass the hot-end heat exchanger, or flow through the fourth pipe segment and the second connecting pipe to allow the first refrigerant to bypass the first heat exchange flow path; or

[0017] The heat pump system further includes a second bypass pipe and a second connecting pipe. One end of the second bypass pipe is connected to a first refrigerant pipe between one end of the first heat exchange flow path and the suction port of the compressor. The other end of the second bypass pipe is connected to a first refrigerant pipe between one end of the hot-end heat exchanger and the throttling element. One end of the second connecting pipe is connected to the second bypass pipe, thereby dividing the second bypass pipe into a third pipe segment and a fourth pipe segment. The other end of the second connecting pipe is connected to a first refrigerant pipe between the other end of the cold-end heat exchanger and the other end of the first heat exchange flow path. The heat pump system further includes a second valve section, which is configured to selectively control the refrigerant flow through the third pipe segment and the second connecting pipe to allow the refrigerant to bypass the first heat exchange flow path, or to flow through the fourth pipe segment and the second connecting pipe to allow the refrigerant to bypass the hot-end heat exchanger.

[0018] By setting up a second bypass pipe and a second connecting pipe, the flow direction of the refrigerant can be controlled, allowing the system to select a suitable flow path according to the current operating status, reducing heat loss during the refrigerant circulation process and improving system energy efficiency.

[0019] In the preferred embodiment of the above-mentioned heat pump system, the heat pump system further includes a third heat exchanger and a second refrigerant pipeline. The third heat exchanger is disposed on the second refrigerant pipeline. A first end of the second refrigerant pipeline is connected to a first refrigerant pipeline between one end of the hot-end heat exchanger and the suction port of the compressor. A second end of the second refrigerant pipeline is connected to a first refrigerant pipeline between the throttling element and one end of the first heat exchange flow path. The heat pump system further includes a valve body or valve assembly, which is configured to selectively control the refrigerant flow through the hot-end heat exchanger and the intermediate heat exchanger, or through the third heat exchanger; or

[0020] The heat pump system further includes a third heat exchanger and a second refrigerant pipeline. The third heat exchanger is disposed on the second refrigerant pipeline. The first end of the second refrigerant pipeline is connected to a first refrigerant pipeline between one end of the first heat exchange flow path and the suction port of the compressor. The second end of the second refrigerant pipeline is connected to the first refrigerant pipeline between the throttling element and one end of the hot-end heat exchanger. The heat pump system further includes a valve body or valve assembly, which is configured to selectively control the refrigerant flow through the hot-end heat exchanger and the intermediate heat exchanger, or through the third heat exchanger.

[0021] By setting up a third heat exchanger and a second refrigerant pipeline, the vapor compression cycle can operate independently, improving the system's applicability to different scenarios and ensuring system operating efficiency.

[0022] In the preferred embodiment of the above-described heat pump system, at least one of the second heat exchanger and the third heat exchanger is an air-cooled heat exchanger; and / or

[0023] The second heat exchanger and the third heat exchanger are independent of each other or belong to different parts of the same heat exchanger.

[0024] By having the second and third heat exchangers belong to the same heat exchanger, a high degree of integration and functional reuse of the heat exchangers can be achieved, thereby reducing the complexity of the system structure and improving the degree of system integration.

[0025] In the preferred embodiment of the above-mentioned heat pump system, 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 suction port of the compressor is connected to the first end of at least one of the hot-end heat exchangers. One end of the throttling element is connected to the second end of at least one of the hot-end heat exchangers. The second heat exchanger exchanges heat with the two cold-end heat exchangers through a first refrigerant.

[0026] 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.

[0027] In the preferred embodiment of the above-described heat pump system, the two thermoacoustic units are housed within the same housing, and the two heat exchange sections are either interconnected or separated by a partition; and / or

[0028] The two cold-end heat exchangers are positioned opposite each other.

[0029] 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.

[0030] In the preferred embodiment of the above-mentioned heat pump system, the first heat exchanger is an indoor heat exchanger, the second heat exchanger is an outdoor heat exchanger, and the freezing point of the first refrigerant is less than or equal to 0°C; and / or

[0031] The heat pump system also includes a four-way valve, the four ports of which are respectively connected to the exhaust port of the compressor, one end of the first heat exchanger, one end of the hot end heat exchanger, and the intake port of the compressor.

[0032] By setting a four-way valve, different modes of the heat pump system can be switched, allowing the heat pump system to operate in multiple modes and further improving the system's applicability. Attached Figure Description

[0033] The present application will now be described with reference to the accompanying drawings. In the drawings:

[0034] Figure 1 This is a system diagram of a first embodiment of the heat pump system of this application;

[0035] Figure 2 This is a system diagram of a second embodiment of the heat pump system of this application;

[0036] Figure 3 A system diagram of the first operating mode of the second embodiment of the heat pump system of this application;

[0037] Figure 4 This is a system diagram illustrating the second operating mode of a second embodiment of the heat pump system of this application;

[0038] Figure 5 This is a system diagram of the third operating mode of the second embodiment of the heat pump system of this application;

[0039] Figure 6 This is a system diagram of a third embodiment of the heat pump system of this application;

[0040] Figure 7 This is a system diagram of the fourth embodiment of the heat pump system of this application;

[0041] Figure 8 This is a system diagram of the fifth embodiment of the heat pump system of this application;

[0042] Figure 9 This is a schematic diagram of the thermoacoustic generator, which is the fifth embodiment of the heat pump system of this application.

[0043] List of reference numerals

[0044] 1. Thermoacoustic unit; 11. Hot-end heat exchanger; 12. Cold-end heat exchanger; 13. Regenerator; 14. Shell; 15. Compressor section; 16. Baffle plate; 21. First heat exchanger; 22. Second heat exchanger; 23. Third heat exchanger; 24. Intermediate heat exchanger; 31. Valve body; 32. First valve section; 33. Second valve section; 34. Third valve section; 35. Fourth valve section; 41. First fan; 42. Second fan; 501. First refrigerant line; 502. Second refrigerant line; 503. First cooling line; 505. First bypass line; 506. Second bypass line; 507. Third bypass line; 508. Fourth bypass line; 509. First connecting line; 510. Second connecting line; 61. First pump body; 7. Compressor; 8. Four-way valve; 9. Throttling element. Detailed Implementation

[0045] Preferred embodiments of this application will now be described 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.

[0046] It should be noted that in the description of this application, terms such as "upper," "lower," "left," and "right," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on 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.

[0047] 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.

[0048] First refer to Figure 1 A brief introduction to the heat pump system of this application is provided below.

[0049] like Figure 1As shown, to address the limitation of application scenarios in existing vapor compression heat pumps, the heat pump system of this application includes a thermoacoustic engine 1, a compressor 7, a first heat exchanger 21, a second heat exchanger 22, an intermediate heat exchanger 24, a first pump body 61, and a throttling element 9. The thermoacoustic engine 1 includes a hot-end heat exchanger 11 and a cold-end heat exchanger 12. The compressor 7 is circulatedly connected to the hot-end heat exchanger 11 via a first refrigerant pipeline 501. The first heat exchanger 21 is mounted on the first refrigerant pipeline 501, with one end connected to the exhaust port of the compressor 7. The throttling element 9 is mounted on the first refrigerant pipeline 501, with both ends connected to the other end of the first heat exchanger 21 and one end of the hot-end heat exchanger 11, respectively. The second heat exchanger 22 is circulatedly connected to the cold-end heat exchanger 12 via a first cooling pipeline 503, which is filled with a first refrigerant. The first pump body 61 is mounted on the first cooling pipeline 503. The intermediate heat exchanger 24 has a first heat exchange flow path and a second heat exchange flow path that can exchange heat with each other. The first heat exchange flow path is connected to the first refrigerant line 501 and is located between the throttling element 9 and the suction port of the compressor 7. The second heat exchange flow path is connected to the first cooling line 503.

[0050] In one possible implementation, the first heat exchanger 21 is located indoors for heat exchange with indoor air, and the second heat exchanger 22 is located outdoors for heat exchange with the outdoor environment. When the outdoor ambient temperature is low and indoor heating is required, the thermoacoustic engine 1, compressor 7, and first pump 61 start operation, and the throttling element 9 opens to a certain degree. On one hand, the thermoacoustic engine 1 utilizes the thermoacoustic effect to generate cooling and heating at the cold-end heat exchanger 12 and the hot-end heat exchanger 11, respectively. Driven by the first pump 61, the first refrigerant exchanges heat with the cold-end heat exchanger 12, transferring the cooling capacity of the cold-end heat exchanger 12 to the second heat exchanger 22, thereby dissipating the cooling capacity through heat exchange between the second heat exchanger 22 and the outdoor environment. On the other hand, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 7 enters the first heat exchanger 21, where it exchanges heat with the indoor air, thus raising the indoor air temperature and achieving indoor heating. After heat exchange, the refrigerant becomes liquid. Then, after passing through the throttling element 9, the refrigerant is cooled and depressurized, becoming a low-temperature, low-pressure gas-liquid mixture and entering the hot-end heat exchanger 11. It absorbs heat from the hot-end heat exchanger 11 and heats up to vaporize. The vaporized refrigerant returns to the compressor 7.

[0051] When the outdoor ambient temperature is high and indoor heating is required, compressor 7 and the first pump 61 start operating, thermoacoustic motor 1 stops, and throttling element 9 opens to a certain degree. The high-temperature, high-pressure gaseous refrigerant discharged from compressor 7 enters the first heat exchanger 21, where it exchanges heat with the indoor air, thus raising the indoor air temperature and achieving indoor heating. After heat exchange, the refrigerant cools down to a liquid state. The liquid refrigerant then passes through throttling element 9 for further cooling and depressurization, becoming a low-temperature, low-pressure gas-liquid mixture. This low-temperature, low-pressure gas-liquid mixture enters the first heat exchange path of intermediate heat exchanger 24, where it exchanges heat with the first refrigerant in the second heat exchange path, causing the refrigerant to heat up and vaporize. The vaporized refrigerant then returns to compressor 7 to continue circulating. Driven by the first pump 61, the first refrigerant circulates between the second heat exchange path and the second heat exchanger 22. When the first refrigerant flows to the second heat exchanger 22, it exchanges heat with the outdoor environment, dissipating the cooling energy into the environment.

[0052] The heat pump system of this application, by simultaneously incorporating a compressor 7 and a thermoacoustic engine 1, combines the thermoacoustic engine 1 with a vapor compression heat pump, enhancing the system's applicability and efficiency. Specifically, by incorporating the thermoacoustic engine 1, heat can be transferred from the cold-end heat exchanger 12 to the hot-end heat exchanger 11 using the thermoacoustic effect within the inefficient operating temperature range of the vapor compression cycle. The cooling and heating generated by the thermoacoustic engine 1 during operation are then used for the vapor compression cycle and the second heat exchanger 22, respectively. Furthermore, since the heat transfer process is less affected by the ambient temperature, the thermoacoustic engine 1 exhibits a significant efficiency advantage compared to traditional vapor compression. By incorporating an intermediate heat exchanger 24, heat exchange between the refrigerant and the first refrigerant can be achieved, enabling the vapor compression cycle to operate independently within its efficient operating range, thus expanding the system's applicability.

[0053] The following is combined with Figure 1 The first specific embodiment of the heat pump system of this application will be described.

[0054] like Figure 1 As shown, in the first embodiment, the heat pump system is applied to a household heating scenario, and includes a thermoelectric motor 1, a first heat exchanger 21, a second heat exchanger 22, an intermediate heat exchanger 24, a first fan 41, a second fan 42, a compressor 7, a four-way valve 8, and a throttling element 9.

[0055] 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.

[0056] 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 13 between the two heat exchangers, the heat and cold energy can be exported and utilized.

[0057] The intermediate heat exchanger 24 is a plate heat exchanger. It has a first heat exchange flow path and a second heat exchange flow path that can exchange heat with each other. The first heat exchange flow path is located in the first refrigerant pipeline 501, and the second heat exchange flow path is located in the first cooling pipeline 503.

[0058] Compressor 7, four-way valve 8, first heat exchanger 21, throttling element 9, first heat exchange flow path, and cold-end heat exchanger 12 are circulated and connected through first refrigerant pipeline 501. Specifically, the discharge port of compressor 7 is connected to the first interface of four-way valve 8, and the second interface of four-way valve 8 is connected to one end of the first heat exchanger 21. Figure 1 The right end shown is connected, and the other end of the first heat exchanger 21 (shown) is connected. Figure 1 The left end shown) and one end of the throttling element 9 ( Figure 1 The right end shown is connected, and the other end of the throttling element 9 ( Figure 1 The left end shown) and one end of the first heat exchange flow path ( Figure 1 The lower end shown is connected, and the other end of the first heat exchange flow path ( Figure 1 The upper end shown) and one end of the hot end heat exchanger 11 ( Figure 1 The lower end shown is connected, and the other end of the hot end heat exchanger 11 (shown below) is connected. Figure 1The upper end (as shown) is connected to the third port of the four-way valve 8, and the fourth port of the four-way valve 8 is connected to the suction port of the compressor 7. The first heat exchanger 21 is an air-cooled heat exchanger, located indoors, while the remaining components—compressor 7, four-way valve 8, throttling element 9, intermediate heat exchanger 24, and thermoacoustic machine 1—are located outdoors. A first fan 41 is positioned corresponding to the first heat exchanger 21. When the first fan 41 starts, it draws indoor air through the first heat exchanger 21, exchanging heat with the refrigerant within it. The throttling element 9 is preferably an electronic expansion valve.

[0059] The second heat exchanger 22 is an air-cooled heat exchanger. It is located outdoors and circulates with the cold-end heat exchanger 12 and the second heat exchange flow path via the first cooling pipe 503. The first pump body 61 is located in the first cooling pipe 503. When the first pump body 61 starts, it drives the first refrigerant to circulate between the second heat exchanger 22, the second heat exchange flow path, and the cold-end heat exchanger 12. Specifically, one end of the second heat exchanger 22 (… Figure 1 The lower end shown is connected to the inlet of the first pump body 61, and the outlet of the first pump body 61 is connected to one end of the second heat exchange flow path. Figure 1 The lower end shown is connected. The other end of the second heat exchange path (shown below) is connected. Figure 1 The upper end shown) and one end of the cold end heat exchanger 12 ( Figure 1 The lower end shown is connected, and the other end of the cold end heat exchanger 12 (shown below) is connected. Figure 1 The upper end shown) and the other end of the second heat exchanger 22 ( Figure 1 (As shown at the upper end) is connected. The second fan 42 is set corresponding to the second heat exchanger 22. When the second fan 42 is started, it drives the outdoor ambient air to flow through the first heat exchanger 21 and exchange heat with the first refrigerant flowing through the first heat exchanger 21. The first refrigerant is selected from those with a freezing point of less than or equal to 0°C, and more preferably from those with a freezing point of less than or equal to -40°C, such as brine, ethylene glycol, methanol, ethanol, or a mixed solution of ethylene glycol, methanol, ethanol and water.

[0060] The following is combined with Figure 1 The working principle of the heat pump system according to the first embodiment of this application will be briefly introduced.

[0061] like Figure 1As shown, when the outdoor ambient temperature is low and indoor heating is required, the ultra-low temperature heating mode is activated. At this time, the thermoacoustic engine 1, compressor 7, and first pump 61 start operating, the throttling element 9 opens to a certain degree, and the first fan 41, second fan 42, and first pump 61 start operating. On one hand, the thermoacoustic engine 1 utilizes the thermoacoustic effect to generate cooling and heating at the cold end heat exchanger 12 and the hot end heat exchanger 11, respectively. The first pump 61 drives the first refrigerant to circulate in the first refrigerant pipeline 503. When flowing through the cold end heat exchanger 12, the first refrigerant exchanges heat with the cold end heat exchanger 12, absorbing the cooling energy from the hot end heat exchanger 11. When the first refrigerant flows through the second heat exchanger 22, it exchanges heat with the outdoor environment, thereby discharging the cooling energy to the outdoor environment through the second heat exchanger 22. On the other hand, the high-temperature, high-pressure gaseous refrigerant discharged from compressor 7 first passes through the first heat exchanger 21, where it exchanges heat with the indoor air, thus raising the indoor air temperature and providing heating. After heat exchange, the refrigerant cools down and becomes liquid. The liquid refrigerant then passes through the throttling element 9, where it is further cooled and depressurized into a low-temperature, low-pressure gas-liquid mixture. As this mixture flows through the first heat exchange path, it transfers some of its cooling capacity to the first refrigerant in the second heat exchange path, which then discharges it to the outdoor environment. The low-temperature, low-pressure gas-liquid mixture continues to flow through the hot-end heat exchanger 11, absorbing heat and rising to a gaseous state. This gaseous refrigerant then returns to compressor 7 to continue the cycle.

[0062] When the outdoor ambient temperature is high and indoor heating is required, the conventional heating mode is activated: Compressor 7 starts running, and thermoacoustic motor 1 stops. Throttling element 9 opens to a certain degree, and the first fan 41, second fan 42, and first pump 61 start running. The high-temperature, high-pressure gaseous refrigerant discharged from compressor 7 enters the first heat exchanger 21 to exchange heat with the indoor air, raising the indoor air temperature and achieving indoor heating. After heat exchange, the refrigerant becomes liquid. Then, after passing through throttling element 9, the refrigerant is cooled and depressurized, becoming a low-temperature, low-pressure gas-liquid mixture. This low-temperature, low-pressure gas-liquid mixture flows through the first heat exchange path of intermediate heat exchanger 24, exchanging heat with the first refrigerant in the second heat exchange path, transferring cooling capacity to the first refrigerant, and absorbing heat from the first refrigerant to rise and become gaseous. The gaseous refrigerant then flows back to compressor 7. The first pump body 61 drives the first refrigerant to circulate in the first refrigerant pipeline 503. When the first refrigerant flows through the second heat exchange path, it exchanges heat with the refrigerant and absorbs the cold energy of the refrigerant. When the first refrigerant flows through the second heat exchanger 22, it exchanges heat with the outdoor ambient air and dissipates the cold energy to the outdoor environment.

[0063] When indoor cooling is required, the cooling mode is activated: The four-way valve 8 reverses, the compressor 7 starts running, and the thermoacoustic motor 1 stops. The throttling element 9 opens to a certain degree, and the first fan 41, the second fan 42, and the first pump 61 start running. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 7 enters the first heat exchange path and exchanges heat with the first refrigerant in the second heat exchange path, transferring heat to the first refrigerant. The refrigerant then absorbs the cooling energy of the first refrigerant and cools down to form a liquid refrigerant. The liquid refrigerant continues to flow through the throttling element 9, cooling and depressurizing to become a low-temperature, low-pressure gas-liquid mixture refrigerant. When the low-temperature, low-pressure refrigerant passes through the second heat exchanger 22, it exchanges heat with the indoor air, thus lowering the indoor air temperature and achieving indoor cooling. After absorbing heat, the refrigerant's temperature rises and it vaporizes into a gaseous state, which then flows back to the compressor 7 to continue circulating. The first pump body 61 drives the first refrigerant to circulate in the first refrigerant pipeline 503. When it flows through the second heat exchange path, the first refrigerant exchanges heat with the refrigerant, absorbing heat from the refrigerant and its temperature rises. When the first refrigerant flows through the second heat exchanger 22, it exchanges heat with the outdoor environment, thereby discharging the heat to the outdoor environment through the second heat exchanger 22.

[0064] The above implementation method, by setting a four-way valve 8, can realize the switching of different modes of the heat pump system, so that the heat pump system can operate in multiple modes, further improving the applicability of the system.

[0065] The following reference Figures 2 to 5 The second embodiment of the heat pump system of this application will be described.

[0066] like Figure 2 As shown, based on the first embodiment, the heat pump system of this embodiment adds a first bypass pipe 505, a first connecting pipe 509, a second bypass pipe 506, a second connecting pipe 510, a first valve section 32, and a second valve section 33. Specifically, one end of the first bypass pipe 505 ( Figure 2 The upper end shown is connected to one end of the second heat exchanger 22. Figure 2 The upper end shown) and one end of the cold end heat exchanger 12 ( Figure 2 On the first cooling pipe 503 between the upper end shown), the other end of the first bypass pipe 505 (shown at the upper end) Figure 2 The lower end shown is connected to the other end of the second heat exchanger 22. Figure 2 The lower end shown) and one end of the second heat exchange flow path ( Figure 2 On the first cooling pipe 503 between the lower left end shown), more specifically on the first cooling pipe 503 between the first pump body 61 and one end of the second heat exchange flow path. One end of the first connecting pipe 509 ( Figure 2 The left end shown is connected to the first bypass pipe 505, thus dividing the first bypass pipe 505 into a first segment ( Figure 2The first connecting pipe section 509 and above) and the second pipe section ( Figure 2 The pipe section below the first connecting pipe 509), the other end of the first connecting pipe 509 ( Figure 2 The right end shown is connected to the other end of the cold end heat exchanger 12. Figure 2 The lower end shown) and the other end of the second heat exchange flow path ( Figure 2 The first refrigerant is located on the first refrigerant pipe 503 between the upper left end (shown in the diagram), that is, on the first refrigerant pipe 503 between the cold end heat exchanger 12 and the second heat exchange flow path. The first valve section 32 is configured to selectively control the flow of the first refrigerant through the first pipe section and the first connecting pipe 509, or through the second pipe section and the first connecting pipe 509. Specifically, the first valve section 32 in this embodiment includes two first three-way control valves, one of which is located at the upper left end (shown in the diagram ... Figure 2 The three ports on the upper left side are respectively connected to one end of the cold end heat exchanger 12, one end of the first bypass pipe 505, and one end of the second heat exchanger 22. Another first three-way control valve (located on the upper left side) is connected to the cold end heat exchanger 12, one end of the first bypass pipe 505, and one end of the second heat exchanger 22. Figure 2 The three ports on the lower left side are respectively connected to one end of the second heat exchange flow path, the other end of the first bypass pipe 505, and the first pump body 61. Each first three-way control valve can achieve individual connection between at least two ports. In this way, the flow direction of the first refrigerant can be controlled by the different connection forms of the two first three-way control valves.

[0067] Continue to refer to Figure 2 One end of the second bypass pipe 506 ( Figure 2 The upper end shown is connected to the suction port of the compressor 7 and one end of the hot-end heat exchanger 11. Figure 2 On the first refrigerant pipe 501 between the upper end shown), the other end of the second bypass pipe 506 (shown at the upper end) Figure 2 The lower end shown is connected to the throttling element 9 and one end of the first heat exchange path. Figure 2 On the first cooling pipe 503 between the lower right end shown in the diagram. One end of the second connecting pipe 510 (shown in the diagram below) Figure 2 The right end shown is connected to the second bypass pipe 506, thus dividing the second bypass pipe 506 into a third pipe segment ( Figure 2 The pipe section located above the second connecting pipe 510) and the fourth section ( Figure 2 The pipe section located below the second connecting pipe 510, the other end of the second connecting pipe 510 is connected to the other end of the hot end heat exchanger 11. Figure 2 The lower end shown) and the other end of the first heat exchange flow path ( Figure 2The first refrigerant pipe 503 between the upper right end shown in the diagram, that is, the first refrigerant pipe 501 between the hot end heat exchanger 11 and the first heat exchange flow path. The second valve section 33 is configured to selectively control the refrigerant flow through the third pipe section and the second connecting pipe 510, or through the fourth pipe section and the second connecting pipe 510. Specifically, the second valve section 33 in this embodiment includes two second three-way control valves, one of which is located at the upper right end of the diagram. Figure 2 The three ports on the upper right side are respectively connected to one end of the hot-end heat exchanger 11, one end of the second bypass pipe 506, and one port of the four-way valve 8. Another second three-way control valve (located on the upper right side) is connected to the other end of the hot-end heat exchanger 11, one end of the second bypass pipe 506, and one port of the four-way valve 8. Figure 2 The three ports on the lower right side are respectively connected to one end of the first heat exchange flow path, the other end of the second bypass pipe 506, and the throttling element 9. Each second three-way control valve can achieve individual connection between at least any two ports. In this way, the flow direction of the refrigerant can be controlled by the different connection forms of the two second three-way control valves.

[0068] The following is combined with Figures 3 to 5 The working principle of the second embodiment of the heat pump system of this application will be introduced.

[0069] First refer to Figure 3When the outdoor ambient temperature is low and users have heating needs, the system operates in ultra-low temperature heating mode: At this time, thermoacoustic motor 1, compressor 7, first fan 41, second fan 42, and first pump 61 start operation. Throttling element 9 opens to a certain degree. The first three-way control valve located on the upper left side is adjusted to connect the second heat exchanger 22 with the cold end heat exchanger 12. The first three-way control valve located on the lower left side is adjusted to connect the first pump 61 with the first bypass pipe 505. The second three-way control valve located on the upper right side is adjusted to connect the four-way valve 8 with the hot end heat exchanger 11. The second three-way control valve located on the lower right side is adjusted to connect the second bypass pipe 506 with the throttling element 9. During the operation of thermoacoustic motor 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 61 drives the first refrigerant to circulate between the cold-end heat exchanger 12 and the second heat exchanger 22. When the first refrigerant reaches the cold-end heat exchanger 12 through the first bypass pipe 505 and the first connecting pipe 509, it exchanges heat with the cold-end heat exchanger 12, absorbing the cold energy in the cold-end heat exchanger 12 and cooling down. When the first refrigerant continues to flow through the second heat exchanger 22, it exchanges heat with the outdoor environment, absorbing the heat from the outdoor environment and heating up. On the other hand, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 7 first passes through the first heat exchanger 21, where it exchanges heat with the indoor air, causing the indoor air temperature to rise accordingly, thus achieving indoor heating. After heat exchange, the refrigerant cools down to a liquid state. After passing through the throttling element 9, the liquid refrigerant cools down and depressurizes, becoming a low-temperature, low-pressure gas-liquid mixture. The low-temperature, low-pressure refrigerant flows through the second bypass pipe 506 and the second connecting pipe 510 to the hot-end heat exchanger 11, where it absorbs heat and rises to vaporize. The vaporized refrigerant returns to the compressor 7 to continue the cycle.

[0070] Next, refer to Figure 4When the outdoor ambient temperature is high and there is a heating demand, the system operates in normal heating mode: At this time, compressor 7, first fan 41, second fan 42, and first pump 61 start running; thermoelectric motor 1 stops; throttling element 9 opens to a certain degree; the first three-way control valve located on the upper left is adjusted to connect the second heat exchanger 22 with the first bypass pipe 505; the first three-way control valve located on the lower left is adjusted to connect the first pump 61 with the second heat exchange flow path; the second three-way control valve located on the upper right is adjusted to connect the four-way valve 8 with the second bypass pipe 506; and the second three-way control valve located on the lower right is adjusted to connect the first heat exchange flow path with the throttling element 9. The high-temperature, high-pressure gaseous refrigerant discharged from compressor 7 passes through the first heat exchanger 21 and exchanges heat with the indoor air within the first heat exchanger 21, thus raising the indoor air temperature and achieving indoor heating. After heat exchange, the refrigerant temperature decreases to liquid refrigerant. The liquid refrigerant continues to flow through the throttling element 9, where it cools and depressurizes, becoming a low-temperature, low-pressure gas-liquid mixture. This low-temperature, low-pressure refrigerant enters the first heat exchange path, where it exchanges heat with the first refrigerant in the second heat exchange path, transferring its cooling capacity to the first refrigerant and absorbing heat from it to vaporize. The vaporized refrigerant returns to the compressor 7 to continue circulating. The first pump body 61 drives the first refrigerant to circulate between the second heat exchange path and the second heat exchanger 22. When the first refrigerant passes through the second heat exchange path, it exchanges heat with the refrigerant in the first heat exchange path, absorbing its cooling capacity and cooling down. When the first refrigerant continues to flow through the second heat exchanger 22, it exchanges heat with the outdoor environment, absorbing heat from the outdoor environment and heating up.

[0071] Finally refer to Figure 5When a user has a cooling need, the system operates in cooling mode: at this time, the four-way valve 8 reverses, the compressor 7, the first fan 41, the second fan 42 and the first pump body 61 start running, the thermoacoustic machine 1 stops, the throttling element 9 opens to a certain degree, the first three-way control valve located on the upper left is adjusted to connect the second heat exchanger 22 with the first bypass pipe 505, the first three-way control valve located on the lower left is adjusted to connect the second pump body with the second heat exchange flow path, the second three-way control valve located on the upper right is adjusted to connect the four-way valve 8 with the second bypass pipe 506, and the second three-way control valve located on the lower right is adjusted to connect the first heat exchange flow path with the throttling element 9. The high-temperature, high-pressure gaseous refrigerant discharged from compressor 7 first passes through the first heat exchange path, where it exchanges heat with the first refrigerant in the second heat exchange path, absorbing the cooling capacity of the first refrigerant and cooling down to form a liquid refrigerant. The liquid refrigerant continues to flow through the throttling element 9, where it cools and depressurizes, becoming a low-temperature, low-pressure gas-liquid mixture refrigerant. This low-temperature, low-pressure refrigerant exchanges heat with the indoor airflow when passing through the first heat exchanger 21, absorbing heat from the indoor air and rising in temperature, thus lowering the indoor air temperature and achieving cooling. The refrigerant in the first heat exchanger 21 vaporizes after heat exchange and returns to compressor 7 to continue the cycle. The first pump body 61 drives the first refrigerant to circulate between the second heat exchange path and the second heat exchanger 22. When the first refrigerant passes through the second heat exchange path, it exchanges heat with the refrigerant in the first heat exchange path, absorbing heat from the refrigerant and rising in temperature. As the first refrigerant continues to flow through the second heat exchanger 22, it exchanges heat with the outdoor environment in the second heat exchanger 22, absorbing the cold energy of the outdoor environment and cooling down.

[0072] By setting up the first bypass pipe 505 and the first connecting pipe 509, the flow direction of the first refrigerant can be controlled, allowing the system to select a suitable flow path according to the current operating state, reducing heat loss during the circulation of the first refrigerant and improving system energy efficiency. Similarly, by setting up the second bypass pipe 506 and the second connecting pipe 510, the flow direction of the refrigerant can be controlled, allowing the system to select a suitable flow path according to the current operating state, reducing heat loss during the refrigerant circulation and improving system energy efficiency.

[0073] The following is combined with Figure 6 The third embodiment of the heat pump system of this application will be briefly introduced.

[0074] like Figure 6As shown, based on the first embodiment, the heat pump system of this embodiment adds a first bypass pipe 505, a second bypass pipe 506, a third bypass pipe 507, a fourth bypass pipe 508, a first valve section 32, a second valve section 33, a third valve section 34, and a fourth valve section 35. The two ends of the first bypass pipe 505 are respectively connected to the two ends of the cold-end heat exchanger 12. The first valve section 32 is configured to selectively control the flow of the first refrigerant through the first bypass pipe 505 or the cold-end heat exchanger 12. The two ends of the second bypass pipe 506 are respectively connected to the two ends of the second heat exchange path. The second valve section 33 is configured to selectively control the flow of the first refrigerant through the second bypass pipe 506 or the second heat exchange path. The two ends of the third bypass pipe 507 are respectively connected to the two ends of the hot end heat exchanger 11. The third valve 34 is configured to selectively control the refrigerant flow through the third bypass pipe 507 or the hot end heat exchanger 11. The two ends of the fourth bypass pipe 508 are respectively connected to the two ends of the first heat exchange flow path. The fourth valve 35 is configured to selectively control the refrigerant flow through the fourth bypass pipe 508 or the first heat exchange flow path.

[0075] Specifically, one end of the first bypass pipe 505 ( Figure 2 The upper left end (as shown) is connected to one end of the second heat exchanger 22. Figure 2 The upper end shown) and one end of the cold end heat exchanger 12 ( Figure 2 On the first cooling pipe 503 between the upper end shown), the other end of the first bypass pipe 505 (shown at the upper end) Figure 2 The lower right end (shown) is connected to the other end of the cold end heat exchanger 12. Figure 2 The lower end shown) and one end of the second heat exchange flow path ( Figure 2 On the first cooling pipe 503 between the upper left end shown. One end of the second bypass pipe 506 (shown at the upper left end) Figure 2 The lower left end (shown) is connected to the other end of the first pump body 61 and the second heat exchange flow path (as shown). Figure 2 On the first cooling pipe 503 between the lower left end shown), the other end of the second bypass pipe 506 (shown at the lower left end) Figure 2 The upper right end (as shown) is connected to the other end of the cold end heat exchanger 12. Figure 2 The lower end shown) and one end of the second heat exchange flow path ( Figure 2 The first cooling pipe 503 is located between the upper left end shown. The first valve section 32 is a three-way control valve, and its three ports are respectively connected to the second heat exchanger 22, the first bypass pipe 505, and the cold end heat exchanger 12. The second valve section 33 is a three-way control valve, and its three ports are respectively connected to the first pump body 61, the second bypass pipe 506, and the second heat exchange flow path.

[0076] One end of the third bypass pipe 507 ( Figure 2 The upper right end (as shown) is connected to one end of the four-way valve 8 and the hot-end heat exchanger 11. Figure 2 On the first refrigerant pipe 501 between the upper end shown), the other end of the third bypass pipe 507 (shown at the upper end) Figure 2 The lower left end shown is connected to the other end of the hot-end heat exchanger 11. Figure 2 The lower end shown) and one end of the first heat exchange flow path ( Figure 2 On the first refrigerant line 501 between the upper right end shown in the diagram. One end of the fourth bypass line 508 (shown in the diagram above the right end) Figure 2 The lower right end (shown) is connected to the throttling element 9 and the other end of the first heat exchange path ( Figure 2 On the first refrigerant pipe 501 between the lower right end shown in the diagram, at the other end of the fourth bypass pipe 508 ( Figure 2 The upper left end shown is connected to the other end of the hot-end heat exchanger 11. Figure 2 The lower end shown) and one end of the first heat exchange flow path ( Figure 2 The first refrigerant line 501 is located between the upper left end shown. The third valve section 34 is a three-way control valve, and its three ports are connected to the four-way valve 8, the third bypass line 507, and the hot-end heat exchanger 11, respectively. The fourth valve section 35 is a three-way control valve, and its three ports are connected to the throttling element 9, the fourth bypass line 508, and the first heat exchange flow path, respectively.

[0077] Thus, by setting up the first bypass pipe 505, the second bypass pipe 506, the third bypass pipe 507, the fourth bypass pipe 508, the first valve section 32, the second valve section 33, the third valve section 34, and the fourth valve section 35, the flow direction of the first refrigerant and the refrigerant can be controlled, resulting in better heat exchange performance in different operating modes and avoiding heat loss of the first refrigerant or refrigerant. The specific working principle of this embodiment is similar to that of the second embodiment, and will not be repeated here.

[0078] The following is combined with Figure 7 The fourth embodiment of the heat pump system of this application will be briefly introduced.

[0079] like Figure 7 As shown, based on the first embodiment, the heat pump system of this embodiment adds a third heat exchanger 23, a valve body 31, and a second refrigerant pipeline 502. Specifically, the third heat exchanger 23 is also an air-cooled heat exchanger, and the second heat exchanger 22 and the third heat exchanger 23 belong to the same heat exchanger. Their arrangement is not limited in this application; for example, they can be arranged side-by-side along the airflow direction, or side-by-side or top-bottom, etc., and their internal flow paths are independent and do not affect each other. The third heat exchanger 23 is installed on the second refrigerant pipeline 502, and the first end of the second refrigerant pipeline 502 ( Figure 7 The upper end shown is connected to one end of the hot-end heat exchanger 11. Figure 7On the first refrigerant line 501 between the upper end shown and the suction port of the compressor 7, at the second end of the second refrigerant line 502 (shown at the upper end), Figure 7 The lower end shown is connected to the throttling element 9 and one end of the first heat exchange path. Figure 7 The second fan 42 can act on the second heat exchanger 22 and the third heat exchanger 23 simultaneously. In other words, when the second fan 42 is started, it can drive indoor air to flow through the second heat exchanger 22 and the third heat exchanger 23 simultaneously or sequentially.

[0080] Valve body 31 is a three-way control valve, and the first port of the three-way control valve ( Figure 7 Middle right interface), second interface ( Figure 7 (Middle and upper side interface) and third interface ( Figure 7 The left-side interface of the three-way control valve is connected to one end of the throttling element 9, one end of the first heat exchange path, and one end of the third heat exchanger 23, respectively. The first interface of the three-way control valve can be selectively connected to the second or third interface to change the direction of refrigerant flow, so that the refrigerant flows through the hot-end heat exchanger 11 and the intermediate heat exchanger 24, or flows through the third heat exchanger 23.

[0081] Thus, by setting up a third heat exchanger 23, the refrigerant vapor compression cycle can operate independently without the aid of an intermediate heat exchanger 24 and a first refrigerant, improving the system's applicability to different scenarios and ensuring system operating efficiency. The specific implementation method of the vapor compression cycle in this embodiment is not difficult to understand, and therefore will not be described further.

[0082] By having the second heat exchanger 22 and the third heat exchanger 23 belong to the same heat exchanger, a high degree of integration and functional reuse of the heat exchangers can be achieved, thereby reducing the complexity of the system structure and improving the degree of system integration.

[0083] The following is combined with Figure 8 and Figure 9 The fifth embodiment of the heat pump system of this application will be briefly introduced.

[0084] like Figure 8 and Figure 9As 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 9 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 8 The suction port of compressor 7 is connected to the first end of at least one hot-end heat exchanger 11, and one end of throttling element 9 is connected to the second end of at least one hot-end heat exchanger 11. The second heat exchanger 22 exchanges heat with two cold-end heat exchangers 12 via a first refrigerant. Specifically, the suction port of compressor 7 is simultaneously connected to the first end of both hot-end heat exchangers 11 (… Figure 8 The upper end shown is connected, and one end of the first heat exchange flow path ( Figure 8 The upper end shown) is simultaneously connected to the second end of the two hot-end heat exchangers 11 ( Figure 8 The lower end of the second heat exchanger 22 is connected, at which point the two hot-end heat exchangers 11 form a structure similar to a "parallel" connection in electrical circuitry. The inlet of the second heat exchanger 22 (as shown) Figure 8 The upper port shown is simultaneously connected to one end of both cold-end heat exchangers 12. Figure 8 The upper end shown is connected, and one end of the second heat exchange flow path ( Figure 8 The upper port shown is simultaneously connected to the other end of the two cold-end heat exchangers 12. Figure 8 The lower end is connected, and at this time the two cold end heat exchangers 12 also form a "parallel" structure similar to that in electricity.

[0085] Thus, by setting two thermoacoustic units in the thermoacoustic unit 1, not only can the cooling and heating capacity be doubled, but the problem of high vibration and noise caused by a single thermoacoustic unit can also 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 the housing 14. The working principle of the above embodiment can be referred to the first embodiment, and will not be repeated here.

[0086] 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.

[0087] For example, in an alternative embodiment, although all the above embodiments are described with the example of the first heat exchanger 21 being located indoors and the second heat exchanger 22 being located outdoors, the locations of the first heat exchanger 21 and the second heat exchanger 22 are not limited to this. Those skilled in the art can choose the locations of the first heat exchanger 21 and the second heat exchanger 22 based on the specific application scenario. For example, in all the above embodiments, the first heat exchanger 21 can also be located outdoors and the second heat exchanger 22 can be located indoors, in which case the heat pump system can be used for high-temperature cooling.

[0088] For example, in another alternative embodiment, although the above embodiment is described with the first heat exchanger 21, the second heat exchanger 22, and the third heat exchanger 23 all being air-cooled heat exchangers as an example, the specific form of the heat exchangers is not unique, and those skilled in the art can adjust them. For example, at least one of the heat exchangers can also be replaced with a liquid-cooled heat exchanger, which has a liquid-cooled inlet and a liquid-cooled outlet, and is configured to circulate with a liquid-cooling source through the liquid-cooled inlet and outlet. For example, the liquid-cooled heat exchanger can exchange heat with groundwater or cooling water in a cold water tank. Moreover, when the heat exchanger is a liquid-cooled heat exchanger, the corresponding fan can be omitted.

[0089] For example, in another alternative embodiment, the arrangement of the second heat exchanger 22 and the third heat exchanger 23 belonging to the same heat exchanger in the fourth embodiment is only a preferred option. In other embodiments, those skilled in the art can also separate and set them independently, for example, setting two outdoor heat exchangers, each of which operates independently and is equipped with a fan or water-cooling components. This replacement of the arrangement does not deviate from the principle of this application.

[0090] For example, in another alternative embodiment, although the first heat exchanger 21 is described in conjunction with its use for indoor cooling or heating, the specific function of the first heat exchanger 21 is not fixed. Those skilled in the art can select it based on specific scenarios. For example, the first heat exchanger 21 can also be a coil heat exchanger, which is installed in a water tank to produce domestic hot water. Furthermore, the first heat exchanger 21 can also be a plate heat exchanger or a shell-and-tube heat exchanger, etc., which is used for indoor heating, etc.

[0091] For example, in another alternative implementation, the above-described partial implementation is illustrated by using a three-way control valve to change the flow direction of the refrigerant or the first refrigerant. However, this configuration is merely exemplary. In other implementations, the three-way control valve can be replaced with two on / off valves (such as solenoid valves), which can also achieve the same flow direction adjustment. Alternatively, when setting two three-way control valves, one of them can be omitted without affecting the implementation of the solution.

[0092] For example, in another alternative embodiment, although the above embodiments are described with the example of a first refrigerant having a freezing point of less than or equal to -40°C, the specific selection of the first refrigerant 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 refrigerant, or other refrigerants with a freezing point of less than or equal to 0°C can be used.

[0093] For example, in another alternative embodiment, although the intermediate heat exchanger 24 in the above-described partial embodiment is introduced in conjunction with a plate heat exchanger, its specific implementation is not limited to this. In other embodiments, the intermediate heat exchanger 24 can also be a shell-and-tube heat exchanger or a coaxial heat exchanger, etc.

[0094] For example, in another alternative embodiment, although some of the above embodiments are described with the example of having a four-way valve 8, this is only a preferred embodiment. With the four-way valve 8 provided, simple switching between different modes can be achieved. Of course, those skilled in the art can omit the four-way valve 8.

[0095] For example, in another alternative embodiment, although the above embodiments are all described with the example of the first heat exchange flow path of the intermediate heat exchanger 24 being set on the first refrigerant pipeline 501 between the hot-end heat exchanger 11 and the throttling element 9, and the second heat exchange flow path being set on the first cooling pipeline 503 between the cold-end heat exchanger 12 and the first pump body 61, the specific setting position of the intermediate heat exchanger 24 is not fixed, and those skilled in the art can make reasonable adjustments to it. For example, the first heat exchange flow path can be set on the first refrigerant pipeline 501 between the four-way valve 8 and the hot-end heat exchanger 11, and the second heat exchange flow path can be set on the first cooling pipeline 503 between the second heat exchanger 22 and the cold-end heat exchanger 12.

[0096] For example, in another alternative embodiment, the connection position of the second bypass pipe 506 in the second embodiment is also different when the setting position of the intermediate heat exchanger 24 is adjusted. For example, when the first heat exchange flow path of the intermediate heat exchanger 24 is set between the four-way valve 8 and the hot end heat exchanger 11, one end of the second bypass pipe 506 is connected to the first refrigerant pipe 501 between the suction port of the compressor 7 and one end of the first heat exchange flow path, and the other end of the second bypass pipe 506 is connected to the first refrigerant pipe 501 between the throttling element 9 and one end of the hot end heat exchanger 11.

[0097] For example, in another alternative embodiment, the connection position of the second refrigerant line 502 varies depending on the adjustment of the intermediate heat exchanger 24. For instance, when the first heat exchange flow path of the intermediate heat exchanger 24 is located between the four-way valve 8 and the hot-end heat exchanger 11, the first end of the second refrigerant line 502 is connected to the first refrigerant line 501 between one end of the first heat exchange flow path and the suction port of the compressor 7, and the second end of the second refrigerant line 502 is connected to the first refrigerant line 501 between the throttling element 9 and one end of the hot-end heat exchanger 11.

[0098] For example, in another alternative embodiment, although the fifth 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 1 can also be arranged opposite each other.

[0099] For example, although the second embodiment described above is illustrated by taking the simultaneous setting of the first bypass pipe 505, the second bypass pipe 506, the first connecting pipe 509, and the second connecting pipe 510 as an example, this is only a preferred embodiment. Those skilled in the art can selectively omit the above-mentioned pipe fittings based on specific application scenarios. For example, one of the first bypass pipe 505 and the second bypass pipe 506 can be omitted.

[0100] For example, although the third embodiment described above is illustrated by simultaneously providing the first bypass pipe 505, the second bypass pipe 506, the third bypass pipe 507, and the fourth bypass pipe 508, this is not intended to limit the scope of protection of this application. Those skilled in the art can omit some of the above-mentioned pipes as needed. For example, any one, two, or three of the above four bypass pipes can be omitted.

[0101] For example, in another alternative embodiment, although the heat exchange sections of the two thermoacoustic units in the fifth embodiment above are separated by a partition 16, this is only one possible way. 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.

[0102] For example, in another alternative implementation, although the fifth 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.

[0103] 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.

[0104] For example, in another alternative embodiment, although the fifth embodiment described above is illustrated by setting both the two cold-end heat exchangers 12 and the two hot-end heat exchangers 11 in a "parallel" configuration, 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 two cold-end heat exchangers 12 and the two hot-end heat exchangers 11 can also be changed so that this application can be applied to more specific application scenarios. For example, the two cold-end heat exchangers 12 and the two hot-end heat exchangers 11 can be "connected in series," that is, the first refrigerant passes through the two cold-end heat exchangers 12 before exchanging heat with the second heat exchanger 22, and the refrigerant after the first heat exchange flow path passes through the two hot-end heat exchangers 11 before returning to the compressor 7.

[0105] For example, in another alternative embodiment, although the above embodiments are described in conjunction with a residential heat pump system, 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 system of this application is also applicable to application scenarios such as commercial heat pumps.

[0106] 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 suitable for more specific application scenarios. For example, the thermoacoustic machine 1 in the fifth implementation method can also be applied to the second, third, and fourth implementation methods.

[0107] 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.

[0108] 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 system, characterized in that, Includes a thermoacoustic engine, compressor, first heat exchanger, second heat exchanger, intermediate heat exchanger, first pump body, and throttling element. The thermoacoustic machine includes a hot-end heat exchanger and a cold-end heat exchanger. The compressor is circulatedly connected to the hot-end heat exchanger through a first refrigerant pipeline. The first heat exchanger is disposed on the first refrigerant pipeline and one end is connected to the exhaust port of the compressor. The throttling element is disposed on the first refrigerant pipeline and both ends are connected to the other end of the first heat exchanger and one end of the hot-end heat exchanger, respectively. The second heat exchanger is circulatedly connected to the cold-end heat exchanger through a first cooling pipeline. The first cooling pipeline is filled with a first refrigerant. The first pump body is disposed on the first cooling pipeline. The intermediate heat exchanger has a first heat exchange flow path and a second heat exchange flow path that can exchange heat with each other. The first heat exchange flow path is connected to the first refrigerant pipeline and is located between the throttling element and the suction port of the compressor. The second heat exchange flow path is connected to the first cooling pipeline.

2. The heat pump system according to claim 1, characterized in that, The heat pump system further includes a first bypass pipe, the two ends of which are respectively connected to the two ends of the cold-end heat exchanger. The heat pump system also includes a first valve, which is configured to selectively control the flow of a first refrigerant through the first bypass pipe or the cold-end heat exchanger; and / or The heat pump system further includes a second bypass pipe, the two ends of which are respectively connected to the two ends of the second heat exchange flow path. The heat pump system also includes a second valve, which is configured to selectively control the flow of the first refrigerant through the second bypass pipe or the second heat exchange flow path.

3. The heat pump system according to claim 1 or 2, characterized in that, The heat pump system further includes a third bypass pipe, the two ends of which are respectively connected to the two ends of the hot-end heat exchanger. The heat pump system also includes a third valve, which is configured to selectively control the flow of refrigerant through the third bypass pipe or the hot-end heat exchanger; and / or The heat pump system further includes a fourth bypass pipe, the two ends of which are respectively connected to the two ends of the first heat exchange flow path. The heat pump system also includes a fourth valve, which is configured to selectively control the refrigerant flow through the fourth bypass pipe or the first heat exchange flow path.

4. The heat pump system according to claim 1, characterized in that, The heat pump system further includes a first bypass pipe and a first connecting pipe. One end of the first bypass pipe is connected to a first refrigerant pipe between one end of the second heat exchanger and one end of the cold-end heat exchanger. The other end of the first bypass pipe is connected to a first refrigerant pipe between the other end of the second heat exchanger and one end of the second heat exchange flow path. One end of the first connecting pipe is connected to the first bypass pipe, such that the first bypass pipe is divided into a first pipe segment and a second pipe segment. The other end of the first connecting pipe is connected to a first refrigerant pipe between the other end of the cold-end heat exchanger and the other end of the second heat exchange flow path. The heat pump system further includes a first valve, which is configured to selectively control the flow of the first refrigerant through the first pipe segment and the first connecting pipe to allow the first refrigerant to bypass the cold-end heat exchanger, or through the second pipe segment and the first connecting pipe to allow the first refrigerant to bypass the second heat exchange flow path.

5. The heat pump system according to claim 1 or 4, characterized in that, The heat pump system further includes a second bypass pipe and a second connecting pipe. One end of the second bypass pipe is connected to a first refrigerant pipe between one end of the hot-end heat exchanger and the suction port of the compressor. The other end of the second bypass pipe is connected to a first refrigerant pipe between the first heat exchange flow path and one end of the throttling element. One end of the second connecting pipe is connected to the second bypass pipe, thereby dividing the second bypass pipe into a third segment and a fourth segment. The other end of the second connecting pipe is connected to a first refrigerant pipe between the other end of the hot-end heat exchanger and the other end of the first heat exchange flow path. The heat pump system further includes a second valve section, which is configured to selectively control the refrigerant flow through the third segment and the second connecting pipe to allow the first refrigerant to bypass the hot-end heat exchanger, or through the fourth segment and the second connecting pipe to allow the first refrigerant to bypass the first heat exchange flow path; or The heat pump system further includes a second bypass pipe and a second connecting pipe. One end of the second bypass pipe is connected to a first refrigerant pipe between one end of the first heat exchange flow path and the suction port of the compressor. The other end of the second bypass pipe is connected to a first refrigerant pipe between one end of the hot-end heat exchanger and the throttling element. One end of the second connecting pipe is connected to the second bypass pipe, thereby dividing the second bypass pipe into a third pipe segment and a fourth pipe segment. The other end of the second connecting pipe is connected to a first refrigerant pipe between the other end of the cold-end heat exchanger and the other end of the first heat exchange flow path. The heat pump system further includes a second valve section, which is configured to selectively control the refrigerant flow through the third pipe segment and the second connecting pipe to allow the refrigerant to bypass the first heat exchange flow path, or to flow through the fourth pipe segment and the second connecting pipe to allow the refrigerant to bypass the hot-end heat exchanger.

6. The heat pump system according to claim 1, characterized in that, The heat pump system further includes a third heat exchanger and a second refrigerant pipeline. The third heat exchanger is disposed within the second refrigerant pipeline. A first end of the second refrigerant pipeline is connected to a first refrigerant pipeline between one end of the hot-end heat exchanger and the suction port of the compressor. A second end of the second refrigerant pipeline is connected to a first refrigerant pipeline between the throttling element and one end of the first heat exchange flow path. The heat pump system also includes a valve body or valve assembly, which is configured to selectively control the refrigerant flow through the hot-end heat exchanger and the intermediate heat exchanger, or through the third heat exchanger; or The heat pump system further includes a third heat exchanger and a second refrigerant pipeline. The third heat exchanger is disposed on the second refrigerant pipeline. The first end of the second refrigerant pipeline is connected to a first refrigerant pipeline between one end of the first heat exchange flow path and the suction port of the compressor. The second end of the second refrigerant pipeline is connected to the first refrigerant pipeline between the throttling element and one end of the hot-end heat exchanger. The heat pump system further includes a valve body or valve assembly, which is configured to selectively control the refrigerant flow through the hot-end heat exchanger and the intermediate heat exchanger, or through the third heat exchanger.

7. The heat pump system according to claim 6, characterized in that, At least one of the second heat exchanger and the third heat exchanger is an air-cooled heat exchanger; and / or The second heat exchanger and the third heat exchanger are independent of each other or belong to different parts of the same heat exchanger.

8. The heat pump system 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 suction port of the compressor is connected to the first end of at least one of the hot-end heat exchangers. One end of the throttling element is connected to the second end of at least one of the hot-end heat exchangers. The second heat exchanger exchanges heat with the two cold-end heat exchangers through a first refrigerant.

9. The heat pump system according to claim 8, 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.

10. The heat pump system according to claim 1, characterized in that, The first heat exchanger is an indoor heat exchanger, the second heat exchanger is an outdoor heat exchanger, and the freezing point of the first refrigerant is less than or equal to 0°C; and / or The heat pump system also includes a four-way valve, the four ports of which are respectively connected to the exhaust port of the compressor, one end of the first heat exchanger, one end of the hot end heat exchanger, and the intake port of the compressor.

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