Compact thermo-acoustic heat pump system

Abstract

The utility model relates to the technical field of thermoacoustic, and provides a compact thermoacoustic heat pump system which comprises at least two thermoacoustic heat pump units which 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 distributed above the two ends of the resonator, and the extension length of a connecting pipeline in the vertical direction can be reduced; 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] This utility model relates to the field of thermoacoustic technology, and in particular to a compact thermoacoustic heat pump system. Background Technology

[0002] A thermoacoustic heat pump system is a device that uses the thermoacoustic effect to supply heat. Unlike traditional heat pumps, it does not rely on a mechanical compressor and refrigerant cycle. Instead, it operates by utilizing the pressure, velocity, and temperature fluctuations generated when sound waves propagate through inert gases such as helium and nitrogen. A thermoacoustic heat pump system consists of a thermoacoustic engine, a heat pump mechanism, and a resonator. As thermoacoustic heat pump systems develop towards higher power, the number of thermoacoustic engines, heat pump mechanisms, and resonators increases. These components are connected in series to form subunits, which are then linked together using connecting pipes.

[0003] To reduce the footprint of the thermoacoustic heat pump system, each thermoacoustic motor and heat pump mechanism is arranged vertically. During implementation, it was found that when using a liquid resonator, because the liquid resonator cannot be inverted, the thermoacoustic motor and heat pump mechanism need to be placed on the same end above the liquid resonator. This necessitates a relatively long connecting pipe to connect adjacent subunits, increasing the size of the thermoacoustic heat pump system. Furthermore, the excessively long connecting pipe reduces the inlet pressure ratio of the thermoacoustic motor, which is detrimental to increasing heating power.

[0004] Therefore, how to solve the problem of long connecting pipes between adjacent sub-units in thermoacoustic heat pump systems has become an important technical problem for those skilled in the art to solve. Utility Model Content

[0005] This invention provides a compact thermoacoustic heat pump system to solve the defect of long connecting pipes between adjacent sub-units in related thermoacoustic heat pump systems.

[0006] This utility model provides a compact thermoacoustic heat pump system, including at least two thermoacoustic heat pump units, and each of the thermoacoustic heat pump units is connected in series to form a closed loop through connecting pipes;

[0007] The thermoacoustic heat pump unit includes a thermoacoustic engine, a resonator, and a heat pump mechanism connected in sequence. The resonator is U-shaped, with one end connected to the outlet end of the thermoacoustic engine and the other end connected to the inlet end of the heat pump mechanism.

[0008] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the resonator is located in a vertical plane, and the thermoacoustic engine and the heat pump mechanism are both disposed above the resonator;

[0009] The connecting pipe is inverted U-shaped, and any two adjacent thermoacoustic heat pump units correspond to one connecting pipe. The connecting pipe is located above the two adjacent thermoacoustic heat pump units.

[0010] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the thermoacoustic engine includes a first heat pump, a first regenerator and a high-temperature heat exchanger, the first heat pump, the first 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 the medium to be heated.

[0011] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the heat pump mechanism includes a second heat pump, a second regenerator, and a room temperature heat exchanger, wherein the second heat pump, the second 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 medium at ambient temperature.

[0012] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the resonator includes a U-shaped tube, a liquid oscillator and an elastic blocking member. The elastic blocking member and the liquid oscillator are disposed inside the U-shaped tube, and the elastic blocking member is disposed 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.

[0013] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the elastic blocking member includes a first elastic membrane, and the thermoacoustic engine further includes a thermal buffer tube, which is disposed between the high-temperature heat exchanger and the resonator;

[0014] The compact thermoacoustic heat pump system also includes a third heat pump, which is disposed on the side of the heat buffer tube near the resonator, and the third heat pump has a fifth channel for heating the medium to be heated.

[0015] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the thermoacoustic engine further includes a bypass pipe disposed outside the thermoacoustic engine, both ends of the bypass pipe being connected to the thermoacoustic engine, the first end of the bypass pipe being located on the side of the first heat pump unit away from the first regenerator, and the second end of the bypass pipe being located on the side of the third heat pump unit close to the high-temperature heat exchanger.

[0016] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the thermoacoustic engine further includes a second elastic membrane, the second elastic membrane being disposed inside the heat buffer tube, and the second elastic membrane being located at the second end of the bypass tube near the high-temperature heat exchanger.

[0017] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the thermoacoustic engine further includes an internal conduit, which is disposed inside the thermoacoustic engine and passes through the first heat pump, the first regenerator and the high-temperature heat exchanger. The internal conduit is made of a material with low thermal conductivity and high temperature resistance.

[0018] According to the present invention, a compact thermoacoustic heat pump system is provided, wherein the internal piping is made of ceramic.

[0019] This utility model provides a compact thermoacoustic heat pump system, comprising at least two thermoacoustic heat pump units connected in series to form a closed loop. Each thermoacoustic heat pump unit includes a thermoacoustic engine, a resonator, and a heat pump mechanism connected in sequence. The resonator is U-shaped, with one end connected to the outlet of the thermoacoustic engine and the other end connected to the inlet of the heat pump mechanism. This configuration, when using a liquid resonator and arranging the thermoacoustic engine and heat pump mechanism vertically, places both the engine and mechanism above the resonator at both ends. This reduces the vertical extension length of the connecting pipes, further decreasing the length of the connecting pipes between adjacent thermoacoustic heat pump units. This solves the problem of long connecting pipes between adjacent sub-units in related technologies, reduces the overall height of the thermoacoustic heat pump system, increases the inlet pressure ratio of the thermoacoustic engine, and improves the heating power of the system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a connection diagram of the compact thermoacoustic heat pump system provided by this utility model when the thermoacoustic engine has a bypass pipe.

[0022] Figure 2 This is a schematic diagram of the vertical placement of the thermoacoustic heat pump unit provided by this utility model when the thermoacoustic engine has a bypass pipe.

[0023] Figure 3 This is a connection diagram of the compact thermoacoustic heat pump system provided by this utility model when the thermoacoustic engine has an internal pipeline.

[0024] Figure 4 This is a schematic diagram of the vertical placement of the thermoacoustic heat pump unit provided by this utility model when the thermoacoustic engine has an internal pipeline.

[0025] Figure label:

[0026] 1. Thermoacoustic heat pump unit; 2. Connecting pipes; 3. Thermoacoustic engine; 4. Resonator; 5. Heat pump mechanism; 6. Thermal buffer tube; 7. First heat pump unit; 8. First regenerator; 9. High-temperature heat exchanger; 10. Liquid oscillator; 11. Second heat pump unit; 12. Second regenerator; 13. Room temperature heat exchanger; 14. U-tube; 15. First elastic membrane; 16. Third heat pump unit; 17. Bypass pipe; 18. Second elastic membrane; 19. Internal pipes. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In related technologies, thermoacoustic heat pump systems include a thermoacoustic engine, a heat pump mechanism, and a resonator. As thermoacoustic heat pump systems develop towards higher 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 to form sub-units, and the sub-units are connected together in series using connecting pipes.

[0029] In each subunit, the heat pump mechanism is located between the thermoacoustic engine and the resonator. When the resonator is U-shaped and the thermoacoustic heat pump unit is arranged vertically, 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 does not have either a heat pump mechanism or a thermoacoustic engine. The height difference between the thermoacoustic engine and the resonator is significant.

[0030] When connecting two thermoacoustic heat pump units 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 motor 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 in order to connect to the thermoacoustic motor of the other thermoacoustic heat pump unit.

[0031] Because of the significant height difference between the thermoacoustic engine and the resonator, the connecting pipe needs to extend a considerable length vertically, resulting in a relatively long connecting pipe.

[0032] The compact thermoacoustic heat pump system provided by this utility model can effectively shorten the length of the connecting pipes and reduce the overall height of the thermoacoustic heat pump system, which is conducive to increasing the inlet pressure ratio of the thermoacoustic engine, thereby improving the heating power.

[0033] The following is combined Figures 1 to 4 This invention describes a compact thermoacoustic heat pump system.

[0034] like Figures 1 to 4 As shown, the compact thermoacoustic heat pump system provided in this embodiment of the present invention includes at least two thermoacoustic heat pump units 1.

[0035] Specifically, each thermoacoustic heat pump unit 1 is connected in series through connecting pipes 2 to form a closed loop. When all thermoacoustic heat pump units 1 operate simultaneously, the output power of the thermoacoustic heat pump system can be increased. For example... Figure 1 and Figure 3 As shown, four thermoacoustic heat pump units 1 are connected in series.

[0036] 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, with one end connected to the outlet end of the thermoacoustic engine 3 and the other end 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 transmit acoustic power and adjust the phase.

[0037] This embodiment combines a thermoacoustic engine 3 and a heat pump mechanism 5. The acoustic power generated by the thermoacoustic engine 3 drives the heat pump mechanism 5 to generate heat, thereby realizing the energy conversion process of high-temperature thermal energy - acoustic energy - medium-temperature thermal energy.

[0038] With this configuration, when using a liquid resonator 4 and arranging the thermoacoustic engine 3 and heat pump mechanism 5 vertically, both the thermoacoustic engine 3 and heat pump mechanism 5 are located above the resonator 4, distributed at both ends of the resonator 4. This reduces the height and volume of the thermoacoustic heat pump unit 1, reduces the height difference between the components above the two ends of the U-shaped resonator 4, and helps to reduce the vertical extension length of the connecting pipe 2. This further reduces the length of the connecting pipe 2 between adjacent thermoacoustic heat pump units 1 in the thermoacoustic heat pump system, resulting in a compact structure. This solves the problem of long connecting pipes between adjacent sub-units in related technologies, helps to reduce the overall height of the thermoacoustic heat pump system, helps to increase the inlet pressure ratio of the thermoacoustic engine 3, and improves the heating power of the thermoacoustic heat pump system.

[0039] When each thermoacoustic heat pump unit 1 is arranged vertically, the resonator 4 is located in the vertical plane with both ends of the resonator 4 facing upwards. The thermoacoustic engine 3 and the heat pump mechanism 5 are respectively arranged above the two ends of the resonator 4.

[0040] The connecting pipe 2 is inverted U-shaped, with one connecting pipe 2 corresponding to any two adjacent thermoacoustic heat pump units 1. The connecting pipe 2 is located 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.

[0041] In this embodiment of the invention, the thermoacoustic engine 3 includes a first heat pump 7, a first regenerator 8, and a high-temperature heat exchanger 9. The first heat pump 7, the first regenerator 8, and the high-temperature heat exchanger 9 are connected in sequence.

[0042] 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.

[0043] The high-temperature medium can heat the working gas in the high-temperature heat exchanger 9, and the working gas in the first heat pump 7 can transfer heat to the medium to be heated, thus creating a temperature gradient in the first regenerator 8. The thermoacoustic engine 3 is filled with working gas, which can be, but is not limited to, inert gases such as helium and nitrogen. When the temperature gradient exceeds a 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, i.e., acoustic work. The acoustic work generated by the thermoacoustic engine 3 is transferred to the heat pump mechanism 5 through the resonator 4.

[0044] For the flow of high-temperature medium into 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 high-temperature heat exchanger 9 through the high-temperature medium. The working gas in the first heat pump 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.

[0045] In this embodiment, the heat pump mechanism 5 includes a second heat pump 11, a second regenerator 12, and a room temperature heat exchanger 13.

[0046] The heat pump mechanism 5 is filled with working gas, which can be, but is not limited to, inert gases such as helium and nitrogen.

[0047] The second heat pump 11, the second 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 from the medium at ambient temperature.

[0048] The acoustic power generated by the thermoacoustic engine 3 is transferred to the heat pump mechanism 5. The acoustic power is gradually consumed in the second regenerator 12. The heat is absorbed from the environment through the room temperature heat exchanger 13 and pumped 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 power into medium-temperature heat energy.

[0049] The compact thermoacoustic heat pump system is formed by connecting at least two thermoacoustic heat pump units 1. The remaining acoustic power consumed 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.

[0050] In this embodiment, the working gases in both 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 will be output for hot water supply.

[0051] In a specific embodiment, a medium to be heated at about 65 degrees Celsius can be introduced into the second channel of the first heat pump 7 and the third channel of the second heat pump 11. When the compact thermoacoustic heat pump system is running, the temperature of the medium to be heated can increase to about 70 degrees Celsius after it flows through the second channel of the first heat pump 7 and the third channel of the second heat pump 11.

[0052] In this embodiment, the resonator 4 includes a U-shaped tube 14, a liquid oscillator 10, and an elastic blocking member. The elastic blocking member and the liquid oscillator 10 are disposed inside the U-shaped tube 14. Elastic blocking members are provided on both sides of the liquid oscillator 10 to prevent splashing 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.

[0053] With this configuration, resonator 4 is a liquid resonator, which, compared to a gas resonator tube, can effectively reduce the volume of the thermoacoustic heat pump system, significantly increase the pressure ratio of the thermoacoustic heat pump system, and reduce the start-up temperature and operating frequency.

[0054] Specifically, the elastic blocking element includes a first elastic membrane 15, which is fixed to 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.

[0055] In a further embodiment, the thermoacoustic engine 3 also 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 also includes a third heat pump 16, which is disposed on the side of the heat buffer tube 6 near the resonator 4. The third heat pump 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 heat pump 16, which can cool the end of the heat buffer tube 6 near the resonator 4. The first elastic membrane 15 is close to the high-temperature heat exchanger 9. Cooling the end of the heat buffer tube 6 near the resonator 4 can prevent the first elastic membrane 15 from contacting the high-temperature working gas, thereby reducing damage to the first elastic membrane 15.

[0056] The medium to be heated in the fifth channel of the third heat pump 16 will absorb heat and its temperature will increase. Water can also be selected as the medium to be heated in the fifth channel of the third heat pump 16. The hot water in the fifth channel of the third heat pump 16 is output to the outside for hot water supply.

[0057] At high heating temperatures, a mismatch in acoustic power between the thermoacoustic engine 3 and the heat pump mechanism 5 can easily occur. The acoustic power is amplified by the thermoacoustic engine 3 and consumed within the heat pump mechanism 5. If the amplification of acoustic power by the thermoacoustic engine 3 exceeds the consumption of acoustic power by the heat pump mechanism 5, the excess acoustic power cannot be effectively utilized, resulting in low heating efficiency.

[0058] In some embodiments of this utility model, 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 the side of the first heat pump 7 away from the first regenerator 8, and the second end of the bypass pipe 17 is located on the side of the third heat pump 16 near the high-temperature heat exchanger 9.

[0059] The acoustic power entering from the inlet of the thermoacoustic engine 3 is partly amplified by the first regenerator 8, and partly not amplified by the bypass pipe 17. This reduces the amount of acoustic power amplified by the thermoacoustic engine 3, reduces the difference between the amount of acoustic power amplified by the thermoacoustic engine 3 and the amount of acoustic power consumed by the heat pump mechanism 5, improves the matching degree of acoustic power between the thermoacoustic engine 3 and the heat pump mechanism 5, reduces the waste of acoustic power, solves the problem of acoustic power mismatch between the thermoacoustic engine 3 and the heat pump mechanism 5 at high heating temperatures, and can significantly improve the heating efficiency of the thermoacoustic heat pump system.

[0060] In addition, the thermoacoustic engine 3 also includes a second elastic membrane 18, which is disposed inside the heat buffer tube 6 and located at the second end of the bypass tube 17 near the high-temperature heat exchanger 9. The second elastic membrane 18 completely isolates the acoustic direct current, effectively preventing a reduction in heating efficiency.

[0061] In some other embodiments of this invention, the thermoacoustic engine 3 further includes an internal conduit 19, which is disposed inside the thermoacoustic engine 3. The internal conduit 19 passes through the first heat pump 7, the first regenerator 8, and the high-temperature heat exchanger 9.

[0062] The acoustic power entering from the inlet of the thermoacoustic engine 3 is partly amplified by the first regenerator 8, and partly not amplified by the inner pipe 19. This reduces the amount of acoustic power amplified by the thermoacoustic engine 3, reduces the difference between the amount of acoustic power amplified by the thermoacoustic engine 3 and the amount of acoustic power consumed by the heat pump mechanism 5, improves the matching degree of acoustic power between the thermoacoustic engine 3 and the heat pump mechanism 5, reduces the waste of acoustic power, solves the problem of acoustic power mismatch between the thermoacoustic engine 3 and the heat pump mechanism 5 at high heating temperatures, and can significantly improve the heating efficiency of the thermoacoustic heat pump system.

[0063] In this embodiment, the inner conduit 19 is made of a material with low thermal conductivity and high temperature resistance to avoid axial heat loss.

[0064] Specifically, the material of the aforementioned internal conduit 19 can be ceramic.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A compact thermoacoustic heat pump system, characterized in that, It includes at least two thermoacoustic heat pump units (1), and each of the thermoacoustic heat pump units (1) is connected in series to form a closed loop through a connecting pipe (2); 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).

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 located above the resonator (4); The connecting pipe (2) is inverted U-shaped, and any two adjacent thermoacoustic heat pump units (1) correspond to one connecting pipe (2). The connecting pipe (2) is located 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) includes a first heat pump (7), a first regenerator (8) and a high-temperature heat exchanger (9), which are connected in sequence. 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.

4. The compact thermoacoustic heat pump system according to claim 3, characterized in that, The heat pump mechanism (5) includes a second heat pump (11), a second regenerator (12), and a room temperature heat exchanger (13). The second heat pump (11), the second 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 from the medium at ambient temperature.

5. The compact thermoacoustic heat pump system according to claim 4, characterized in that, The resonator (4) includes a U-shaped tube (14), a liquid oscillator (10), and an elastic blocking member. The elastic blocking member and the liquid oscillator (10) are disposed inside the U-shaped tube (14). The elastic blocking member is disposed 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 element includes a first elastic membrane (15), and the thermoacoustic engine (3) also 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 also includes a third heat pump (16), which is disposed on the side of the heat buffer tube (6) near the resonator (4) and has a fifth channel for heating the medium to be heated.

7. The compact thermoacoustic heat pump system according to claim 6, characterized in that, The thermoacoustic engine (3) also includes a bypass pipe (17), which is located 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 the side of the first heat pump (7) away from the first regenerator (8), and the second end of the bypass pipe (17) is located on the 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) also includes a second elastic membrane (18), which is disposed inside the heat buffer tube (6) and is located at the second end of the bypass tube (17) on the side close to the high-temperature heat exchanger (9).

9. The compact thermoacoustic heat pump system according to any one of claims 3-6, characterized in that, The thermoacoustic engine (3) also includes an internal pipe (19), which is located inside the thermoacoustic engine (3). The internal pipe (19) passes through the first heat pump (7), the first regenerator (8), and the high-temperature heat exchanger (9). The internal pipe (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 internal conduit (19) is made of ceramic.

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