Compact thermo-acoustic heat pump system

Abstract

The invention relates to the technical field of thermoacoustic, and provides a compact thermoacoustic heat pump system which comprises at least two thermoacoustic heat pump units, and the thermoacoustic heat pump units are connected in series through connecting pipelines to form a closed loop. The thermo-acoustic heat pump unit comprises a thermo-acoustic engine, a resonator and a heat pump mechanism which are sequentially connected, the resonator is U-shaped, one end of the resonator is connected with the outlet end of the thermo-acoustic engine, and the other end of the resonator is connected with the inlet end of the heat pump mechanism. Thus, when the liquid resonator is adopted and the thermo-acoustic engine and the heat pump mechanism are arranged in the vertical direction, the thermo-acoustic engine and the heat pump mechanism are both located above the resonator and distributed at the two ends of the resonator, and the extension length of a connecting pipeline in the vertical direction is reduced advantageously; the length of the connecting pipeline between the adjacent thermo-acoustic heat pump units of the thermo-acoustic heat pump system is further reduced, the overall height of the thermo-acoustic heat pump system is reduced, a more compact structure is obtained, the inlet pressure ratio of a thermo-acoustic engine is increased, and the heating power of the thermo-acoustic heat pump system is improved.

Description

Technical Field

[0001] The invention relates to the field of thermoacoustic technology, and in particular to a compact thermoacoustic heat pump system. Background Art

[0002] Thermoacoustic heat pump system is a device that uses thermoacoustic effect to achieve heat supply. Unlike traditional heat pumps, it does not rely on mechanical compressors and refrigerant cycles, but works through the pressure, velocity and temperature fluctuations generated when sound waves propagate in inert gases such as helium and nitrogen. Thermoacoustic heat pump system includes thermoacoustic engine, heat pump mechanism and resonator. As the thermoacoustic heat pump system develops towards high power, the number of thermoacoustic engine, heat pump mechanism and resonator will increase. Thermoacoustic engine, heat pump mechanism and resonator are connected in series in sequence to form sub-units, and each sub-unit is connected in series using connecting pipes.

[0003] In order to reduce the floor space of the thermoacoustic heat pump system, each thermoacoustic engine and heat pump mechanism will be arranged in a vertical direction. During the implementation process, it was found that when a liquid resonator is used, since the liquid resonator cannot be inverted, the thermoacoustic engine and the heat pump mechanism need to be arranged at the same end above the liquid resonator, resulting in the need for a long connecting pipe to connect adjacent sub-units, which increases the volume of the thermoacoustic heat pump system. In addition, if the connecting pipe is too long, the inlet pressure ratio of the thermoacoustic engine will be reduced, which is not conducive to the improvement of heating power.

[0004] Therefore, how to solve the problem of long connecting pipes between adjacent sub-units in the thermoacoustic heat pump system in the related art has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The present invention provides a compact thermoacoustic heat pump system, which is used to solve the defect of long connecting pipelines between adjacent subunits in the thermoacoustic heat pump system in the related art.

[0006] The present invention provides a compact thermoacoustic heat pump system, comprising at least two thermoacoustic heat pump units, each of which is connected in series through a connecting pipeline to form a closed loop; The thermoacoustic heat pump unit comprises a thermoacoustic engine, a resonator and a heat pump mechanism connected in sequence, wherein the resonator is U-shaped, one end of the resonator is connected to the outlet end of the thermoacoustic engine, and the other end of the resonator is connected to the inlet end of the heat pump mechanism.

[0007] According to a compact thermoacoustic heat pump system provided by the present invention, the resonator is located in a vertical plane, and the thermoacoustic engine and the heat pump mechanism are both arranged above the resonator; The connecting pipeline is in an inverted U shape, and any two adjacent thermoacoustic heat pump units correspond to one connecting pipeline, and the connecting pipeline is arranged above the two adjacent thermoacoustic heat pump units.

[0008] According to a compact thermoacoustic heat pump system provided by the present invention, the thermoacoustic engine includes a first heat pump, a first heat regenerator and a high-temperature heat exchanger, wherein the first heat pump, the first heat regenerator and the high-temperature heat exchanger are connected in sequence, the high-temperature heat exchanger has a first channel for absorbing heat from a high-temperature medium, and the first heat pump has a second channel for heating a medium to be heated.

[0009] According to a compact thermoacoustic heat pump system provided by the present invention, the heat pump mechanism includes a second heat pump, a second heat regenerator and a room temperature heat exchanger, the second heat pump, the second heat regenerator and the room temperature heat exchanger are connected in sequence, the second heat pump has a third channel for heating the medium to be heated, and the room temperature heat exchanger has a fourth channel for absorbing heat from the ambient temperature medium.

[0010] According to a compact thermoacoustic heat pump system provided by the present invention, the resonator includes a U-shaped tube, a liquid oscillator and an elastic blocking member, the elastic blocking member and the liquid oscillator are arranged inside the U-shaped tube, the elastic blocking member is arranged on both sides of the liquid oscillator, one end of the U-shaped tube is connected to the outlet end of the thermoacoustic engine, and the other end of the U-shaped tube is connected to the inlet end of the heat pump mechanism.

[0011] According to a compact thermoacoustic heat pump system provided by the present invention, the elastic blocking member includes a first elastic membrane, the thermoacoustic engine further includes a thermal buffer tube, and the thermal buffer tube is arranged between the high-temperature heat exchanger and the resonator; The compact thermoacoustic heat pump system further includes a third heat pump, which is disposed on a side of the heat buffer tube close to the resonator, and has a fifth channel for heating a medium to be heated.

[0012] According to a compact thermoacoustic heat pump system provided by the present invention, the thermoacoustic engine also includes a bypass pipe, which is arranged outside the thermoacoustic engine, and both ends of the bypass pipe are connected to the thermoacoustic engine. The first end of the bypass pipe is located on a side of the first heat pump away from the first heat regenerator, and the second end of the bypass pipe is located on a side of the third heat pump close to the high-temperature heat exchanger.

[0013] According to a compact thermoacoustic heat pump system provided by the present invention, the thermoacoustic engine also includes a second elastic membrane, which is arranged inside the thermal buffer tube and located on the second end of the bypass tube near the high-temperature heat exchanger.

[0014] According to a compact thermoacoustic heat pump system provided by the present invention, the thermoacoustic engine also includes an internal pipeline, which is arranged inside the thermoacoustic engine, and the internal pipeline runs through the first pump heat exchanger, the first heat regenerator and the high-temperature heat exchanger. The internal pipeline is made of a material with low thermal conductivity and high temperature resistance.

[0015] According to a compact thermoacoustic heat pump system provided by the present invention, the inner pipeline is made of ceramic.

[0016] The compact thermoacoustic heat pump system provided by the present invention comprises at least two thermoacoustic heat pump units, each of which is connected in series through a connecting pipeline to form a closed loop. The thermoacoustic heat pump unit comprises a thermoacoustic engine, a resonator and a heat pump mechanism connected in sequence, the resonator is U-shaped, one end of the resonator is connected to the outlet end of the thermoacoustic engine, and the other end of the resonator is connected to the inlet end of the heat pump mechanism. In this way, when a liquid resonator is used and the thermoacoustic engine and the heat pump mechanism are arranged in a vertical direction, the thermoacoustic engine and the heat pump mechanism are both located above the resonator, and the thermoacoustic engine and the heat pump mechanism are distributed at both ends of the resonator, which is conducive to reducing the extension length of the connecting pipeline in the vertical direction, further reducing the length of the connecting pipeline between adjacent thermoacoustic heat pump units of the thermoacoustic heat pump system, solving the problem of long connecting pipelines between adjacent subunits in the thermoacoustic heat pump system in the related art, and is conducive to reducing the overall height of the thermoacoustic heat pump system, and is conducive to increasing the inlet pressure ratio of the thermoacoustic engine, and improving the heating power of the thermoacoustic heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a connection schematic diagram of the compact thermoacoustic heat pump system provided by the present invention when the thermoacoustic engine has a bypass pipe.

[0019] Figure 2 It is a schematic diagram of vertical placement of the thermoacoustic heat pump unit provided by the present invention when the thermoacoustic engine has a bypass pipe.

[0020] Figure 3 It is a connection schematic diagram of the compact thermoacoustic heat pump system provided by the present invention when the thermoacoustic engine has an internal pipeline.

[0021] Figure 4 It is a schematic diagram of the vertical placement of the thermoacoustic heat pump unit provided by the present invention when the thermoacoustic engine has an internal pipeline.

[0022] Reference numerals: 1. Thermoacoustic heat pump unit; 2. Connecting pipeline; 3. Thermoacoustic engine; 4. Resonator; 5. Heat pump mechanism; 6. Heat buffer tube; 7. First pump heat exchanger; 8. First regenerator; 9. High-temperature heat exchanger; 10. Liquid oscillator; 11. Second pump heat exchanger; 12. Second regenerator; 13. Room temperature heat exchanger; 14. U-tube; 15. First elastic membrane; 16. Third pump heat exchanger; 17. Bypass pipe; 18. Second elastic membrane; 19. Internal pipeline. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the related art, the thermoacoustic heat pump system includes a thermoacoustic engine, a heat pump mechanism and a resonator. As the thermoacoustic heat pump system develops towards high power, the number of thermoacoustic engines, heat pump mechanisms and resonators will increase. The thermoacoustic engine, heat pump mechanism and resonator are connected in series in sequence to form sub-units, and each sub-unit is connected in series using a connecting pipe.

[0025] In each subunit, the heat pump mechanism is located between the thermoacoustic engine and the resonator. When the resonator is set in a U-shape, when the thermoacoustic heat pump unit is set in a vertical direction, the heat pump mechanism is located above the first end of the resonator, and the thermoacoustic engine is located above the heat pump mechanism. The second end of the resonator is neither provided with a heat pump mechanism nor a thermoacoustic engine. The height difference between the thermoacoustic engine and the resonator is large.

[0026] When two thermoacoustic heat pump units are connected together, the first end of the connecting pipe is connected to the resonator of one of the thermoacoustic heat pump units, and the second end of the connecting pipe is connected to the thermoacoustic engine of the other thermoacoustic heat pump unit. The connecting pipe needs to extend upward from the second end of the resonator to a certain length before it can be connected to the thermoacoustic engine of the other thermoacoustic heat pump unit.

[0027] Since there is a large difference between the height of the thermoacoustic engine and the height of the resonator, the connecting pipeline needs to extend a long length in the vertical direction, resulting in a longer length of the connecting pipeline.

[0028] The compact thermoacoustic heat pump system provided by the present invention can effectively shorten the length of the connecting pipeline and reduce the overall height of the thermoacoustic heat pump system, which is beneficial to increase the inlet pressure ratio of the thermoacoustic engine, thereby improving the heating power.

[0029] Combine the following Figures 1 to 4 A compact thermoacoustic heat pump system of the present invention is described.

[0030] like Figures 1 to 4 As shown, the compact thermoacoustic heat pump system provided by the embodiment of the present invention includes at least two thermoacoustic heat pump units 1.

[0031] Specifically, each thermoacoustic heat pump unit 1 is connected in series through the connecting pipe 2 to form a closed loop, and each thermoacoustic heat pump unit 1 operates simultaneously, which can improve the output power of the thermoacoustic heat pump system. Figure 1 and Figure 3 As shown, four thermoacoustic heat pump units 1 are connected in series.

[0032] The thermoacoustic heat pump unit 1 includes a thermoacoustic engine 3, a resonator 4 and a heat pump mechanism 5 connected in sequence. The resonator 4 is U-shaped, one end of the resonator 4 is connected to the outlet end of the thermoacoustic engine 3, and the other end of the resonator 4 is connected to the inlet end of the heat pump mechanism 5. The resonator 4 connects the thermoacoustic engine 3 and the heat pump mechanism 5 to transfer acoustic power and adjust the phase.

[0033] This embodiment combines the thermoacoustic engine 3 and the heat pump mechanism 5, and utilizes the acoustic work generated by the thermoacoustic engine 3 to drive the heat pump mechanism 5 for heating, thereby realizing the energy conversion process of high-temperature thermal energy-acoustic energy-medium-temperature thermal energy.

[0034] With such an arrangement, when a liquid resonator 4 is adopted and the thermoacoustic engine 3 and the heat pump mechanism 5 are arranged in the vertical direction, the thermoacoustic engine 3 and the heat pump mechanism 5 are both located above the resonator 4, and the thermoacoustic engine 3 and the heat pump mechanism 5 are distributed at both ends of the resonator 4, thereby reducing the height and volume of the thermoacoustic heat pump unit 1, and reducing the height difference of the components above the two ends of the U-shaped resonator 4, which is beneficial to reducing the extension length of the connecting pipe 2 in the vertical direction, and further reducing the length of the connecting pipe 2 between adjacent thermoacoustic heat pump units 1 of the thermoacoustic heat pump system. The structure is compact, and the problem of long connecting pipes between adjacent sub-units existing in the thermoacoustic heat pump system in the related art is solved, which is beneficial to reducing the overall height of the thermoacoustic heat pump system, and is beneficial to increasing the inlet pressure ratio of the thermoacoustic engine 3, and improving the heating power of the thermoacoustic heat pump system.

[0035] When each thermoacoustic heat pump unit 1 is arranged in a vertical direction, the resonator 4 is located in a vertical plane, and both ends of the resonator 4 are arranged upward. The thermoacoustic engine 3 and the heat pump mechanism 5 are arranged above both ends of the resonator 4, respectively.

[0036] The connecting pipe 2 is in an inverted U shape, and any two adjacent thermoacoustic heat pump units 1 correspond to one connecting pipe 2, and the connecting pipe 2 is arranged above the two adjacent thermoacoustic heat pump units 1. Specifically, one end of the connecting pipe 2 is connected to the heat pump mechanism 5 of one of the thermoacoustic heat pump units 1, and the other end of the connecting pipe 2 is connected to the thermoacoustic engine 3 of the other thermoacoustic heat pump unit 1.

[0037] In the embodiment of the present invention, the thermoacoustic engine 3 includes a first heat pump 7, a first heat regenerator 8 and a high temperature heat exchanger 9. The first heat pump 7, the first heat regenerator 8 and the high temperature heat exchanger 9 are connected in sequence.

[0038] The high-temperature heat exchanger 9 has a first channel for absorbing heat from the high-temperature medium, and the first heat pump 7 has a second channel for heating the medium to be heated.

[0039] The high-temperature medium can heat the working gas in the high-temperature heat exchanger 9, and the working gas in the first pump heat exchanger 7 can transfer heat to the medium to be heated, so that there is a temperature gradient in the first regenerator 8. The thermoacoustic engine 3 is filled with working gas, which can be but not limited to inert gases such as helium and nitrogen. When the temperature gradient exceeds the critical value, due to the thermoacoustic effect, self-excited thermoacoustic oscillation begins, converting high-temperature thermal energy into mechanical work in the form of sound waves, that is, acoustic work. The acoustic work generated by the thermoacoustic engine 3 is transferred to the heat pump mechanism 5 through the resonator 4.

[0040] For the high-temperature medium to flow to the high-temperature heat exchanger 9, the high-temperature medium can be heated by a burner, and the heat generated by the burner can be transferred to the working gas in the high-temperature heat exchanger 9 by the high-temperature medium. The working gas in the first pump heat exchanger 7 can transfer heat to the medium to be heated in the second channel, thereby increasing the temperature of the medium to be heated in the second channel.

[0041] In this embodiment, the heat pump mechanism 5 includes a second heat pump 11 , a second heat regenerator 12 and a room temperature heat exchanger 13 .

[0042] The heat pump mechanism 5 is filled with working gas, and the working gas may be, but is not limited to, inert gas such as helium and nitrogen.

[0043] The second heat pump 11, the second heat regenerator 12 and the room temperature heat exchanger 13 are connected in sequence. The second heat pump 11 has a third channel for heating the medium to be heated, and the room temperature heat exchanger 13 has a fourth channel for absorbing heat of the medium at ambient temperature.

[0044] The acoustic work generated by the thermoacoustic engine 3 is transferred to the heat pump mechanism 5, and the acoustic work is gradually consumed in the second regenerator 12, absorbing heat from the environment through the room temperature heat exchanger 13, and pumping the heat to the second heat pump 11 to heat the medium to be heated in the third channel, thereby increasing the temperature of the medium to be heated in the third channel and converting the acoustic work into medium-temperature thermal energy.

[0045] The compact thermoacoustic heat pump system is formed by connecting at least two thermoacoustic heat pump units 1 , and the remaining acoustic work after consumption in the heat pump mechanism 5 of the previous thermoacoustic heat pump unit 1 will enter the thermoacoustic engine 3 of the next thermoacoustic heat pump unit 1 .

[0046] In this embodiment, the working gas in the first heat pump 7 and the second heat pump 11 can output heat to the medium to be heated. Water can be selected as the medium to be heated, and the hot water heated by the first heat pump 7 and the second heat pump 11 is output for hot water supply.

[0047] In a specific embodiment, a medium to be heated at about 65 degrees Celsius can be introduced into the second channel of the first pump heat unit 7 and the third channel of the second pump heat unit 11. When the compact thermoacoustic heat pump system is in operation, the temperature of the medium to be heated can be increased to about 70 degrees Celsius after flowing through the second channel of the first pump heat unit 7 and the third channel of the second pump heat unit 11.

[0048] In this embodiment, the resonator 4 includes a U-shaped tube 14, a liquid vibrator 10 and an elastic blocking member, wherein the elastic blocking member and the liquid vibrator 10 are arranged inside the U-shaped tube 14, and elastic blocking members are arranged on both sides of the liquid vibrator 10, and the elastic blocking members are used to prevent splashing of the liquid vibrator 10. One end of the U-shaped tube 14 is connected to the outlet end of the thermoacoustic engine 3, and the other end of the U-shaped tube 14 is connected to the inlet end of the heat pump mechanism 5.

[0049] With such arrangement, the resonator 4 is a liquid resonator, which can effectively reduce the volume of the thermoacoustic heat pump system, greatly improve the pressure ratio of the thermoacoustic heat pump system, and reduce the starting temperature and operating frequency compared to the gas resonance tube.

[0050] Specifically, the elastic blocking member includes a first elastic membrane 15, and the first elastic membrane 15 is fixed on both sides of the U-shaped tube 14. The liquid oscillator 10 can be water, and the liquid oscillator 10 fills the U-shaped tube 14 to ensure that there is no gas in the resonator 4.

[0051] In a further embodiment, the thermoacoustic engine 3 further includes a heat buffer tube 6, which is disposed between the high-temperature heat exchanger 9 and the resonator 4. The compact thermoacoustic heat pump system further includes a third pump heat unit 16, which is disposed on a side of the heat buffer tube 6 close to the resonator 4, and the third pump heat unit 16 has a fifth channel for heating the medium to be heated. The medium to be heated flows through the fifth channel in the third pump heat unit 16, which can cool down the end of the heat buffer tube 6 close to the resonator 4. The first elastic membrane 15 is close to the high-temperature heat exchanger 9, and the end of the heat buffer tube 6 close to the resonator 4 is cooled, which can avoid the first elastic membrane 15 from contacting with the high-temperature working gas, and can reduce the damage to the first elastic membrane 15.

[0052] The medium to be heated in the fifth channel of the third pump heat exchanger 16 absorbs heat and its temperature increases. The medium to be heated in the fifth channel of the third pump heat exchanger 16 can also be water. The hot water in the fifth channel of the third pump heat exchanger 16 is output to the outside for hot water supply.

[0053] At high heating temperatures, the acoustic power between the thermoacoustic engine 3 and the heat pump mechanism 5 is prone to mismatch, and the acoustic power is amplified by the thermoacoustic engine 3 and consumed in the heat pump mechanism 5. If the amplification of the acoustic power by the thermoacoustic engine 3 is greater than the consumption of the acoustic power by the heat pump mechanism 5, the excess acoustic power cannot be effectively utilized, resulting in low heating efficiency.

[0054] In some embodiments of the present invention, the thermoacoustic engine 3 further includes a bypass pipe 17, which is disposed outside the thermoacoustic engine 3. Both ends of the bypass pipe 17 are connected to the thermoacoustic engine 3, the first end of the bypass pipe 17 is located on a side of the first pump heat unit 7 away from the first regenerator 8, and the second end of the bypass pipe 17 is located on a side of the third pump heat unit 16 close to the high-temperature heat exchanger 9.

[0055] Part of the acoustic power entering from the inlet end of the thermoacoustic engine 3 is amplified through the first regenerator 8, and the other part passes through the bypass pipe 17 and will not be amplified, thereby reducing the amplification of the acoustic power by the thermoacoustic engine 3, reducing the difference between the amplification of the acoustic power by the thermoacoustic engine 3 and the consumption of the acoustic power by the heat pump mechanism 5, improving the matching degree of the acoustic power between the thermoacoustic engine 3 and the heat pump mechanism 5, reducing the waste of acoustic power, solving the problem of acoustic power mismatch between the thermoacoustic engine 3 and the heat pump mechanism 5 at high heating temperature, and being able to greatly improve the heating efficiency of the thermoacoustic heat pump system.

[0056] In addition, the thermoacoustic engine 3 further includes a second elastic membrane 18, which is disposed inside the heat buffer tube 6 and is located at a side of the second end of the bypass tube 17 close to the high-temperature heat exchanger 9. The second elastic membrane 18 completely isolates the acoustic direct current, effectively avoiding a reduction in heating efficiency.

[0057] In some other embodiments of the present invention, the thermoacoustic engine 3 further includes an inner pipeline 19, which is arranged inside the thermoacoustic engine 3. The inner pipeline 19 runs through the first pump heat device 7, the first regenerator 8 and the high-temperature heat exchanger 9.

[0058] Part of the acoustic power entering from the inlet end of the thermoacoustic engine 3 is amplified through the first regenerator 8, and the other part passes through the internal pipe 19 and will not be amplified, thereby reducing the amplification of the acoustic power by the thermoacoustic engine 3, reducing the difference between the amplification of the acoustic power by the thermoacoustic engine 3 and the consumption of the acoustic power by the heat pump mechanism 5, improving the matching degree of the acoustic power between the thermoacoustic engine 3 and the heat pump mechanism 5, reducing the waste of acoustic power, solving the problem of acoustic power mismatch between the thermoacoustic engine 3 and the heat pump mechanism 5 at high heating temperature, and being able to greatly improve the heating efficiency of the thermoacoustic heat pump system.

[0059] In this embodiment, the inner pipe 19 is made of a material with low thermal conductivity and high temperature resistance to avoid axial heat conduction loss.

[0060] Specifically, the inner pipe 19 may be made of ceramic.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compact thermoacoustic heat pump system, characterized in that: It comprises at least two thermoacoustic heat pump units (1), each of the thermoacoustic heat pump units (1) being connected in series via a connecting pipeline (2) to form a closed loop; The thermoacoustic heat pump unit (1) comprises a thermoacoustic engine (3), a resonator (4) and a heat pump mechanism (5) which are connected in sequence, wherein the resonator (4) is U-shaped, one end of the resonator (4) is connected to the outlet end of the thermoacoustic engine (3), and the other end of the resonator (4) is connected to the inlet end of the heat pump mechanism (5).

2. The compact thermoacoustic heat pump system according to claim 1, characterized in that: The resonator (4) is located in a vertical plane, and the thermoacoustic engine (3) and the heat pump mechanism (5) are both arranged above the resonator (4); The connecting pipeline (2) is in an inverted U-shape, and any two adjacent thermoacoustic heat pump units (1) correspond to one connecting pipeline (2), and the connecting pipeline (2) is arranged above the two adjacent thermoacoustic heat pump units (1).

3. The compact thermoacoustic heat pump system according to claim 1, characterized in that: The thermoacoustic engine (3) comprises a first heat pump (7), a first heat regenerator (8) and a high-temperature heat exchanger (9); the first heat pump (7), the first heat regenerator (8) and the high-temperature heat exchanger (9) are connected in sequence; the high-temperature heat exchanger (9) has a first channel for absorbing heat from a high-temperature medium; and the first heat pump (7) has a second channel for heating a medium to be heated.

4. The compact thermoacoustic heat pump system according to claim 3, characterized in that: The heat pump mechanism (5) comprises a second heat pump (11), a second heat regenerator (12) and a room temperature heat exchanger (13); the second heat pump (11), the second heat regenerator (12) and the room temperature heat exchanger (13) are connected in sequence; the second heat pump (11) has a third channel for heating a medium to be heated; and the room temperature heat exchanger (13) has a fourth channel for absorbing heat from a medium at an ambient temperature.

5. The compact thermoacoustic heat pump system according to claim 4, characterized in that: The resonator (4) comprises a U-shaped tube (14), a liquid oscillator (10) and an elastic blocking member, wherein the elastic blocking member and the liquid oscillator (10) are arranged inside the U-shaped tube (14), and the elastic blocking member is arranged on both sides of the liquid oscillator (10), one end of the U-shaped tube (14) is connected to the outlet end of the thermoacoustic engine (3), and the other end of the U-shaped tube (14) is connected to the inlet end of the heat pump mechanism (5).

6. The compact thermoacoustic heat pump system according to claim 5, characterized in that: The elastic blocking member comprises a first elastic membrane (15), and the thermoacoustic engine (3) further comprises a heat buffer tube (6), wherein the heat buffer tube (6) is arranged between the high-temperature heat exchanger (9) and the resonator (4); The compact thermoacoustic heat pump system further comprises a third heat pump (16), wherein the third heat pump (16) is arranged on a side of the heat buffer tube (6) close to the resonator (4), and the third heat pump (16) has a fifth channel for heating a medium to be heated.

7. The compact thermoacoustic heat pump system according to claim 6, characterized in that: The thermoacoustic engine (3) further comprises a bypass pipe (17), wherein the bypass pipe (17) is arranged outside the thermoacoustic engine (3), and both ends of the bypass pipe (17) are connected to the thermoacoustic engine (3), wherein the first end of the bypass pipe (17) is located on a side of the first heat pump (7) away from the first heat regenerator (8), and the second end of the bypass pipe (17) is located on a side of the third heat pump (16) close to the high-temperature heat exchanger (9).

8. The compact thermoacoustic heat pump system according to claim 7, characterized in that: The thermoacoustic engine (3) further comprises a second elastic membrane (18), wherein the second elastic membrane (18) is arranged inside the heat buffer tube (6), and the second elastic membrane (18) is located at a side of the second end of the bypass tube (17) close to the high-temperature heat exchanger (9).

9. The compact thermoacoustic heat pump system according to any one of claims 3 to 6, characterized in that: The thermoacoustic engine (3) further comprises an internal pipeline (19), wherein the internal pipeline (19) is arranged inside the thermoacoustic engine (3), and the internal pipeline (19) runs through the first heat pump (7), the first heat regenerator (8) and the high-temperature heat exchanger (9), and the internal pipeline (19) is made of a material with low thermal conductivity and high temperature resistance.

10. The compact thermoacoustic heat pump system according to claim 9, characterized in that: The material of the inner pipeline (19) is ceramic.

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