Thermoacoustic pump

Abstract

The invention relates to the technical field of fluid pumping equipment, in particular to a thermoacoustic pump which comprises a thermoacoustic engine, a pump loop pipeline and a connecting pipe section, and the thermoacoustic engine comprises a shell, a gas tank and a resonance pipe; a high-temperature cavity, a heat return cavity and a room-temperature cavity which are sequentially communicated are formed in the shell; the pump loop pipeline is provided with a first one-way valve and a second one-way valve, the first one-way valve and the second one-way valve only allow fluid in the pump loop pipeline to flow in the same direction, and one end of the connecting pipe section is connected to the pump loop pipeline and located between the first one-way valve and the second one-way valve. And the other end of the connecting pipe section is communicated with a room temperature cavity in the shell. According to the invention, the conveying of gas, liquid and supercritical fluid can be realized. The defects that in the prior art, a mechanical pump is complex in structure and needs to be maintained frequently are overcome, no mechanical moving part is arranged, the structure is simpler, the service life is longer, and the maintenance frequency and cost are greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid pumping equipment, and more specifically, to a thermoacoustic pump. Background Art

[0002] A mechanical pump is a device that uses mechanical motion to output power and thus achieve the transportation of liquids or gases. Traditional mechanical pumps include centrifugal pumps, reciprocating pumps, gear pumps, screw pumps, diaphragm pumps, etc. Although these mechanical pumps are widely used, they still have certain deficiencies. On the one hand, traditional mechanical pumps rely on mechanical moving parts such as pistons, gears, and crankshafts to achieve power output. These parts have complex structures, require precise machining and assembly, and have high manufacturing costs. Moreover, these parts are prone to mechanical wear during operation and require regular maintenance, resulting in high maintenance costs. On the other hand, traditional mechanical pumps often generate significant noise and vibration during operation, causing acoustic pollution to the environment. Summary of the Invention

[0003] In view of the problems of complex structure and frequent maintenance of mechanical pumps in the above-mentioned prior art, the present invention provides a thermoacoustic pump, which has a simpler structure, no mechanical moving parts, and lower maintenance frequency and cost.

[0004] To solve the above technical problems, the technical solution provided by the present invention is as follows:

[0005] A thermoacoustic pump includes a thermoacoustic engine, a pump circuit pipeline, and a connecting pipe segment. The thermoacoustic engine includes a housing, an air tank, and a resonator tube. A high-temperature chamber, a regenerative chamber, and a room-temperature chamber are sequentially provided and communicated inside the housing. The air tank is communicated with the room-temperature chamber through the resonator tube. A first check valve and a second check valve are provided on the pump circuit pipeline. Both the first check valve and the second check valve only allow the fluid in the pump circuit pipeline to flow in the same direction. One end of the connecting pipe segment is connected to the pump circuit pipeline and is located between the first check valve and the second check valve, and the other end of the connecting pipe segment is communicated with the room-temperature chamber inside the housing.

[0006] In the above technical solution, the gas tank ensures that pressure oscillation can occur in the thermoacoustic engine; the resonator tube is used to adjust the frequency and amplitude of the oscillation. During use, an external device can be connected between the outlet end of the first one-way valve and the inlet end of the second one-way valve in the pump circuit pipeline. Under the action of the temperature difference formed by the high-temperature heat exchanger and the room-temperature heat exchanger, the fluid in the thermoacoustic engine generates pressure oscillation. At any position of the housing and the resonator tube, its pressure changes in a sinusoidal form over time. Since the pressure amplitude is the largest at the outlet end of the room-temperature cavity, the connecting pipe section is arranged at the outlet end of the room-temperature cavity to utilize the pressure oscillation here to drive the fluid flow in the pump circuit pipeline. During the process of the pressure rising at the inlet end of the first one-way valve, the fluid pressure at the inlet end of the first one-way valve gradually becomes greater than the fluid pressure at its outlet end and opens the first one-way valve at a certain moment; after the first one-way valve opens, the fluid flows to between the first one-way valve and the second one-way valve, making the fluid pressure between the two gradually increase to the peak value; during the process of the pressure dropping at the outlet end of the second one-way valve, the fluid located at the inlet end of the second one-way valve will open the second one-way valve at a certain moment and flow back into the connecting pipe section and the resonator tube. In a new cycle, the fluid repeats the above steps to flow directionally in the pump circuit pipeline. Since the oscillation fluid frequency generated by the thermoacoustic engine is relatively high, in the high-frequency working state, the fluid can form an almost stable flow state in the pump circuit pipeline, so as to provide a stable flow output for the external device. Such a thermoacoustic pump has a simpler structure, no mechanical moving parts, a longer service life, and greatly reduced maintenance frequency and cost. Moreover, it has no mechanical vibration and mechanical friction during operation, has less noise, is suitable for scenarios with high requirements for environmental noise, and also has a higher energy conversion rate.

[0007] Preferably, a flowmeter is provided on the pump circuit pipeline. On the one hand, the flowmeter is used to monitor the flow condition of the fluid in the pump circuit pipeline in real time, which is convenient for understanding the operation state of the thermoacoustic pump in real time, promptly discovering abnormal situations and making timely adjustments; on the other hand, it provides flow data, which is convenient for evaluating and optimizing the performance of the thermoacoustic pump.

[0008] Preferably, a first pressure sensor and a second pressure sensor are provided on the pump circuit pipeline, and the first pressure sensor and the second pressure sensor are respectively located on both sides of the flowmeter. The first pressure sensor and the second pressure sensor are respectively used to measure the air pressure on the input side and the output side of the flowmeter, so as to determine the pressure changes at the input end and the output end of the flowmeter, and thus confirm whether each component in the pump circuit pipeline is in normal operation state.

[0009] Preferably, a flow regulating valve is provided on the pump circuit pipeline, and the flow regulating valve is located between the second pressure sensor and the second one-way valve. The flow regulating valve is used to adjust the fluid flow rate in the pump circuit pipeline to meet the requirements of the external device for different flow rates.

[0010] Preferably, a third pressure sensor is provided on the pump circuit pipeline, and the third pressure sensor is located between the flow regulating valve and the second one-way valve. The third pressure sensor is also used to measure the air pressure. By comparing the measured values of the first pressure sensor, the second pressure sensor, and the third pressure sensor, it is possible to more accurately confirm whether each component in the pump circuit pipeline is in a normal operating state.

[0011] Preferably, a first insulation box and a second insulation box are further included. A part of the resonator tube and the gas tank are both located inside the first insulation box; another part of the resonator tube, the room temperature heat exchanger, and the pump circuit pipeline are all located inside the second insulation box. Setting the first insulation box and the second insulation box can keep the fluid in the gas tank, the resonator tube, and the pump circuit pipeline at a constant temperature, reduce external interference, and thus enable the equipment to operate stably.

[0012] Preferably, a first water-cooled blower is provided inside the first insulation box, and a second water-cooled blower is provided inside the second insulation box. The two water-cooled blowers are connected to a constant temperature water tank outside. They can blow cold air at a constant temperature into the two insulation boxes respectively, so that the temperatures in the two insulation boxes reach appropriate and constant values.

[0013] Preferably, the thermoacoustic engine further includes a high-temperature heat exchanger, a regenerator, and a room temperature heat exchanger. The high-temperature heat exchanger, the regenerator, and the room temperature heat exchanger are respectively located in the high-temperature cavity, the regenerative cavity, and the room temperature cavity. The high-temperature heat exchanger is used to heat the fluid in the high-temperature cavity, and the room temperature heat exchanger is used to keep the fluid in the room temperature cavity at room temperature. At the same time, a temperature gradient is generated on the regenerator with a porous structure, promoting the occurrence of pressure oscillation.

[0014] Preferably, the high-temperature heat exchanger, the regenerator, and the room temperature heat exchanger are all located outside the first insulation box and the second insulation box. Setting the high-temperature heat exchanger, the regenerator, and the room temperature heat exchanger outside the second insulation box can facilitate the maintenance and monitoring of these key components. Moreover, setting the high-temperature heat exchanger outside the second insulation box can reduce the influence of the temperature of the high-temperature heat exchanger on the fluid temperature in the resonator tube and the pump circuit pipeline, which is beneficial to improving the transmission efficiency of acoustic power.

[0015] Preferably, a switching valve is provided at the outlet end of the gas tank. The switching valve is used to control the on-off between the inner cavity of the gas tank and the outside. During the operation of the thermoacoustic pump, the switching valve is in the open state; while when it is necessary to replace resonator tubes of different lengths to adjust the resonance frequency, the switching valve can be closed to prevent the fluid in the gas tank from flowing out.

[0016] Advantages of the present invention: The thermoacoustic pump can realize the transportation of gases, liquids and supercritical fluids. The thermoacoustic pump has a simple structure, no mechanical moving parts, a longer service life, and greatly reduced maintenance frequency and costs. Moreover, during operation, it has no mechanical vibration and mechanical friction, produces less noise, is suitable for scenarios with high requirements for environmental noise, has a higher energy conversion rate, and has good application prospects. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a first embodiment of a thermoacoustic pump;

[0018] Figure 2 is a schematic structural diagram inside the housing of a thermoacoustic engine;

[0019] Figure 3 is a diagram of the mass flow rate change of the pump circuit pipeline before the thermoacoustic engine starts;

[0020] Figure 4 is a diagram of the mass flow rate change of the pump circuit pipeline after the thermoacoustic engine starts;

[0021] Figure 5 is a flow differential pressure curve diagram under different conditions;

[0022] Figure 6 is a schematic structural diagram inside the first insulation box and the second insulation box;

[0023] Figure 7 is a schematic external structure diagram of the first insulation box and the second insulation box.

[0024] In the drawings: 1 - pump circuit pipeline; 2 - connecting pipe section; 3 - housing; 301 - high-temperature chamber; 302 - regenerative chamber; 303 - room-temperature chamber; 4 - high-temperature heat exchanger; 5 - regenerator; 6 - room-temperature heat exchanger; 7 - gas tank; 8 - resonator tube; 9 - first check valve; 10 - second check valve; 11 - flowmeter; 12 - first pressure sensor; 13 - second pressure sensor; 14 - flow regulating valve; 15 - third pressure sensor; 16 - first insulation box; 17 - second insulation box; 18 - first water-cooled fan; 19 - second water-cooled fan; 20 - switching valve. Detailed Embodiments

[0025] The drawings are only for illustrative purposes and should not be construed as limitations on this patent; for better illustration of this embodiment, some components in the drawings are omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and should not be construed as limitations on this patent.

[0026] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] The technical solution of the present invention will be further specifically described below through specific embodiments in conjunction with the accompanying drawings:

[0028] Embodiment 1

[0029] This embodiment is the first embodiment of a thermoacoustic pump, in combination with Figure 1 and Figure 2 As shown, it includes a thermoacoustic engine, a pump circuit pipeline 1 and a connecting pipe section 2. The thermoacoustic engine includes a housing 3, a high-temperature heat exchanger 4, a regenerator 5, a room-temperature heat exchanger 6, a gas tank 7 and a resonator tube 8. A high-temperature cavity 301, a regenerative cavity 302 and a room-temperature cavity 303 are sequentially arranged and communicated inside the housing 3. The high-temperature heat exchanger 4, the regenerator 5 and the room-temperature heat exchanger 6 are respectively located in the high-temperature cavity 301, the regenerative cavity 302 and the room-temperature cavity 303. The high-temperature heat exchanger 4 is used to heat the fluid in the high-temperature cavity 301, and the room-temperature heat exchanger 6 is used to keep the fluid in the room-temperature cavity 302 at room temperature, so that there is a temperature gradient on the regenerator 5 with a porous structure, promoting the occurrence of pressure oscillation. The gas tank 7 is communicated with the room-temperature cavity 303 through the resonator tube 8; a first check valve 9 and a second check valve 10 are provided on the pump circuit pipeline 1. Both the first check valve 9 and the second check valve 10 only allow the fluid in the pump circuit pipeline 1 to flow in the same direction. Specifically, the first check valve 9 only allows the fluid to flow upward, and the second check valve 10 only allows the fluid to flow to the right; one end of the connecting pipe section 2 is connected to the pump circuit pipeline 1 and is located between the first check valve 9 and the second check valve 10, and the other end of the connecting pipe section 2 is communicated with the room-temperature cavity 303.

[0030] Furthermore, a switch valve 20 is provided at the outlet end of the gas tank 7. The switch valve 20 is used to control the on-off between the inner cavity of the gas tank 7 and the outside. During the operation of the thermoacoustic pump, the switch valve 20 is in the open state; and when it is necessary to replace the resonator tube 8 with different lengths to adjust the resonance frequency, the switch valve 20 can be closed to prevent the fluid in the gas tank 7 from flowing out.

[0031] Working principle or process of this embodiment: The gas tank 7 ensures that pressure oscillation can occur in the thermoacoustic engine; the resonator tube 8 is used to adjust the frequency and amplitude of the oscillation. When in use, an external device can be connected between the outlet end of the first check valve 9 and the inlet end of the second check valve 10 in the pump circuit pipeline 1. Under the action of the temperature difference formed by the high-temperature heat exchanger 4 and the room-temperature heat exchanger 6, the fluid in the thermoacoustic engine generates pressure oscillation. At any position of the housing 3 and the resonator tube 8, the pressure changes in a sinusoidal form over time. Since the pressure amplitude is the largest at the outlet end of the room-temperature cavity, the connecting pipe segment 2 is arranged at the outlet end of the room-temperature cavity 303 to utilize the pressure oscillation here to drive the fluid flow in the pump circuit pipeline 1. During the process of the pressure at the inlet end of the first check valve 9 rising, the fluid pressure at the inlet end of the first check valve 9 gradually becomes greater than the fluid pressure at its outlet end and opens the first check valve 9 at a certain moment; after the first check valve 9 is opened, the fluid flows to between the first check valve 9 and the second check valve 10, making the fluid pressure between the two gradually increase to the peak value; during the process of the pressure at the outlet end of the second check valve 10 dropping, the fluid located at the inlet end of the second check valve 10 will open the second check valve 10 at a certain moment and flow back into the connecting pipe segment 2 and the resonator tube 8. In a new cycle, the fluid repeats the above steps to flow directionally in the pump circuit pipeline 1. Since the oscillation fluid frequency generated by the thermoacoustic engine is relatively high, in the high-frequency working state, the fluid can form an almost stable flow state in the pump circuit pipeline 1, so as to provide a stable flow output for the external device.

[0032] It should be noted that the fluid used in this thermoacoustic pump is generally a gas. Preferably, it can be a supercritical fluid such as supercritical carbon dioxide, and the fluid used in this embodiment is supercritical carbon dioxide.

[0033] Beneficial effects of this embodiment: This thermoacoustic pump has a simpler structure, no mechanical moving parts, a longer service life, and greatly reduced maintenance frequency and cost. Moreover, it has no mechanical vibration and mechanical friction during operation, has less noise, is suitable for scenarios with high requirements for environmental noise, and also has a higher energy conversion rate, showing good application prospects.

[0034] Embodiment 2

[0035] This embodiment is the second embodiment of a thermoacoustic pump. This embodiment is similar to Embodiment 1, and the difference is that, as Figure 1 shown, a flowmeter 11 is provided on the pump circuit pipeline 1. On the one hand, the flowmeter 11 monitors the flow condition of the fluid in the pump circuit pipeline 1 in real time, facilitating the real-time understanding of the operation state of this thermoacoustic pump, promptly discovering abnormal situations and making timely adjustments; on the other hand, it provides flow data, facilitating the evaluation and optimization of the performance of this thermoacoustic pump.

[0036] Furthermore, a first pressure sensor 12 and a second pressure sensor 13 are provided on the pump circuit pipeline 1, and the first pressure sensor 12 and the second pressure sensor 13 are respectively located on both sides of the flowmeter 11. The first pressure sensor 12 and the second pressure sensor 13 are respectively used to measure the air pressure on the input side and the output side of the flowmeter 11, so as to determine the pressure change at the input end and the output end of the flowmeter 11, thereby confirming whether each component in the pump circuit pipeline 1 is in normal operation.

[0037] Furthermore, a flow regulating valve 14 is provided on the pump circuit pipeline 1, and the flow regulating valve 14 is located between the second pressure sensor 13 and the second check valve 10. Specifically, the flow regulating valve 14 is a ball valve. The flow regulating valve 14 is used to adjust the fluid flow rate in the pump circuit pipeline 1 to meet the requirements of external equipment for different flow rates.

[0038] Furthermore, a third pressure sensor 15 is provided on the pump circuit pipeline 1, and the third pressure sensor 15 is located between the flow regulating valve 14 and the second check valve 10. The third pressure sensor 15 is also used to measure the air pressure. By comparing the measured values of the first pressure sensor 12, the second pressure sensor 13, and the third pressure sensor 15, it is possible to more accurately confirm whether each component in the pump circuit pipeline 1 is in normal operation.

[0039] The working principle or working process of this embodiment: Connect an external device between the flow regulating valve 14 and the second check valve 10 on the pump circuit pipeline 1. Before starting the high-temperature heat exchanger 4 and the room-temperature heat exchanger 6, the flow rate data measured by the flowmeter 11 is as Figure 3 shown, Figure 3 in which the data acquisition times of the two curves with different shades of color are 20 minutes apart. It can be seen from the figure that whether it is 20 minutes before or 20 minutes later, the fluid flow rate is basically zero. After starting the high-temperature heat exchanger 4 and the room-temperature heat exchanger 6 and their temperatures are 43°C and 23°C (room temperature) respectively, the flow rate data measured by the flowmeter 11 is as Figure 4 shown, Figure 4 in which the data acquisition times of the two curves with different shades of color are also 20 minutes apart. It can be seen from the figure that whether it is 20 minutes before or 20 minutes later, the fluid flow rate is around 3.6 kg / h. Although neither of the two curves is a horizontal straight line, this is due to the measurement error of the flowmeter 11 and can be regarded as the fluid flow rate being stable at 3.6 kg / h. This can prove that this thermoacoustic pump can stably generate a flow rate and has stable and reliable performance.

[0040] In addition to the above verification method, this embodiment also adopts a method to obtain the differential pressure - flow curve of the thermoacoustic pump. Fully open the flow regulating valve 14, and use the flowmeter 11 to measure a maximum flow value. At this time, according to the second pressure sensor 13 and the third pressure sensor 15, determine the pressure difference before and after the flow regulating valve 14, and a point on the flow - differential pressure curve can be obtained. Then change the opening degree of the flow regulating valve 14 to control the flow rate, making the flow rates be 75%, 50%, 25%, and 0% of the maximum flow rate respectively, and then determine the pressure difference before and after the flow regulating valve 14 respectively. Finally, a complete flow - differential pressure curve is obtained. Then change the heat exchange temperature of the high - temperature heat exchanger 4, and repeat the above steps respectively to obtain multiple flow - differential pressure curves, specifically as Figure 5 shown. This method can obtain the differential pressure - flow curve of the thermoacoustic pump, serving the design, selection, operation, and optimization of the thermoacoustic pump.

[0041] Other features, working principles, and beneficial effects of this embodiment are the same as those of Embodiment 1.

[0042] Embodiment 3

[0043] This embodiment is the third embodiment of a thermoacoustic pump. This embodiment is similar to Embodiment 2, and the difference lies in that, as shown in combination with Figure 1 , Figure 2 , Figure 6 and Figure 7 , it further includes a first insulation box 16 and a second insulation box 17. A part of the resonator tube 8 and the gas tank 7 are both located inside the first insulation box 16; another part of the resonator tube 8, the room - temperature heat exchanger 6, and the pump circuit pipeline 1 are all located inside the second insulation box 17. Setting the first insulation box 16 and the second insulation box 17 can keep the fluids in the gas tank 7, the resonator tube 8, and the pump circuit pipeline 1 at a constant temperature, reducing external interference, and thus improving the transmission efficiency of acoustic power.

[0044] Furthermore, the high - temperature heat exchanger 4, the regenerator 5, and the room - temperature heat exchanger 6 are all located outside the first insulation box 16 and the second insulation box 17. Setting the high - temperature heat exchanger 4, the regenerator 5, and the room - temperature heat exchanger 6 outside the second insulation box 17 can facilitate the maintenance and monitoring of these key components. Moreover, setting the high - temperature heat exchanger 4 outside the second insulation box 17 can reduce the influence of the temperature of the high - temperature heat exchanger 4 on the fluid temperature in the resonator tube 8 and the pump circuit pipeline 1, and improve the operation stability.

[0045] Furthermore, a first water - cooled blower 18 is provided inside the first insulation box 16, and a second water - cooled blower 19 is provided inside the second insulation box 17. The two water - cooled blowers are connected to a constant - temperature water tank outside, and can blow cold air at a constant temperature into the two insulation boxes respectively through them, so that the temperatures in the two insulation boxes reach appropriate and constant values.

[0046] The other features, working principles, and beneficial effects of this embodiment are the same as those of Embodiment 2.

[0047] In the specific content of the above specific implementation manner, each technical feature can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not conflict, they should be considered as within the scope described in this specification.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A thermoacoustic pump, characterized in that: The invention comprises a thermoacoustic engine, a pump loop pipeline (1) and a connecting pipe section (2), wherein the thermoacoustic engine comprises a shell (3), a gas tank (7) and a resonance tube (8), wherein a high-temperature chamber (301), a heat recovery chamber (302) and a room-temperature chamber (303) which are connected in sequence are arranged in the shell (3); the gas tank (7) is connected to the room-temperature chamber (303) through the resonance tube (8); a first one-way valve (9) and a second one-way valve (10) are arranged on the pump loop pipeline (1), wherein the first one-way valve (9) and the second one-way valve (10) only allow the fluid in the pump loop pipeline (1) to flow in the same direction, wherein one end of the connecting pipe section (2) is connected to the pump loop pipeline (1) and is located between the first one-way valve (9) and the second one-way valve (10), and the other end of the connecting pipe section (2) is connected to the room-temperature chamber in the shell (3).

2. A thermoacoustic pump according to claim 1, characterized in that: A flow meter (11) is provided on the pump loop pipeline (1).

3. A thermoacoustic pump according to claim 2, characterized in that: The pump loop pipeline (1) is provided with a first pressure sensor (12) and a second pressure sensor (13), and the first pressure sensor (12) and the second pressure sensor (13) are respectively located on both sides of the flow meter (11).

4. A thermoacoustic pump according to claim 3, characterized in that: The pump loop pipeline (1) is provided with a flow regulating valve (14), and the flow regulating valve (14) is located between the second pressure sensor (13) and the second one-way valve (10).

5. A thermoacoustic pump according to claim 4, characterized in that: A third pressure sensor (15) is provided on the pump loop pipeline (1), and the third pressure sensor (15) is located between the flow regulating valve (14) and the second one-way valve (10).

6. A thermoacoustic pump according to claim 1, characterized in that: It also includes a first insulation box (16) and a second insulation box (17), wherein a portion of the resonance tube (8) and the gas tank (7) are both located in the first insulation box (16); and another portion of the resonance tube (8), the room temperature heat exchanger (6) and the pump loop pipeline (1) are all located in the second insulation box (17).

7. A thermoacoustic pump according to claim 6, characterized in that: A first water-cooled hair dryer (18) is provided in the first heat preservation box (16), and a second water-cooled hair dryer (19) is provided in the second heat preservation box (17).

8. A thermoacoustic pump according to claim 6, characterized in that: The thermoacoustic engine further comprises a high-temperature heat exchanger (4), a regenerator (5) and a room-temperature heat exchanger (6), wherein the high-temperature heat exchanger (4), the regenerator (5) and the room-temperature heat exchanger (6) are respectively located in the high-temperature chamber (301), the regenerator chamber (302) and the room-temperature chamber (303).

9. A thermoacoustic pump according to claim 7, characterized in that: The high-temperature heat exchanger (4), the regenerator (5) and the room-temperature heat exchanger (6) are all located outside the first insulation box (16) and the second insulation box (17).

10. A thermoacoustic pump according to any one of claims 1 to 9, characterized in that: The outlet end of the gas tank (7) is provided with a switch valve (20).

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