Thermomagnetic refrigeration system

Abstract

The present application relates to the technical field of solid-state refrigeration, and provides a thermoelastic refrigeration system, which comprises a cold-end heat exchanger, a hot-end heat exchanger, a thermoelastic material, a thermoacoustic engine and a transmission assembly; the cold-end heat exchanger and the hot-end heat exchanger are oppositely arranged along a first direction; the thermoelastic material can reciprocate along the first direction and can be stretched along a second direction; the thermoelastic material is in contact with the hot-end heat exchanger when being stretched and is in contact with the cold-end heat exchanger when being reset; the thermoacoustic engine is in driving connection with the thermoelastic material through the transmission assembly; and the transmission assembly is used for converting the driving of the thermoacoustic engine into the divided movement of the thermoelastic material along the first direction and along the second direction; in this way, the structure is simplified, the cost is saved, the thermoacoustic engine itself has no moving parts, thereby the use of complex moving parts is reduced, the overall thermoelastic refrigeration system is more compact and efficient; in addition, the thermoacoustic engine driven by low-grade heat is used as the power generation part of the thermoelastic refrigeration system, and the energy utilization rate is improved.

Description

Technical Field

[0001] This invention relates to the technical field of solid-state refrigeration systems, and more particularly to an elastothermic refrigeration system. Background Technology

[0002] With the development of refrigeration technology, vapor compression refrigeration technology has been widely used in various fields such as refrigerators and air conditioners. However, the environmental problems caused by various refrigerants have also attracted people's attention. Therefore, the development and research of new refrigeration technologies have received widespread attention.

[0003] Elastic-thermal refrigeration technology, as a novel solid-state refrigeration technology, does not require the use of refrigerants and has no negative impact on the environment, making it a green and environmentally friendly refrigeration method. When internal stress changes, the interconversion between martensite and austenite can be achieved, thereby changing the temperature of the elasto-thermal material itself.

[0004] In existing technologies, elastothermal cooling systems generally use motor drives to achieve the stretching, unloading, and heat exchange of elastothermal materials, resulting in numerous moving parts and complex composition. Summary of the Invention

[0005] This invention provides an elastic-thermal cooling system to reduce the problem of numerous moving parts and complex composition in existing motor-driven elastic-thermal cooling systems, thereby optimizing the loading method and making the overall elastic-thermal cooling system more compact and efficient.

[0006] This invention provides an elastic-thermal refrigeration system, comprising: a cold-end heat exchanger, a hot-end heat exchanger, an elastic-thermal material, a thermoacoustic engine, and a transmission assembly;

[0007] The cold-end heat exchanger and the hot-end heat exchanger are arranged opposite to each other along a first direction, and the elastothermal material is disposed between the cold-end heat exchanger and the hot-end heat exchanger.

[0008] The elasto-thermal material can reciprocate along a first direction and can be stretched along a second direction perpendicular to the first direction; when stretched, the elasto-thermal material contacts the hot-end heat exchanger to release heat to the outside; when reset, the elasto-thermal material contacts the cold-end heat exchanger to release cold energy to the outside.

[0009] The thermoacoustic engine and the elasto-thermal material are connected by a transmission assembly; the transmission assembly is used to convert the driving force of the thermoacoustic engine into component motions of the elasto-thermal material along the first direction and component motions along the second direction.

[0010] According to a thermo-elastic cooling system provided by the present invention, the transmission assembly includes a push rod, a connecting part, and a guide part;

[0011] The connecting part is slidably connected to the guide part, and the movement of the connecting part can be decomposed into a component movement along the first direction and a component movement along the second direction;

[0012] One end of the elastothermal material is slidably restricted in the first direction, and the other end is fixedly connected to the connecting part.

[0013] The thermoacoustic engine is connected to the connecting part via the push rod, which is used to push the connecting part to slide.

[0014] According to the present invention, a thermo-elastic cooling system is provided, wherein a guide groove is inclinedly provided on the connecting part; the guide part is fixed to the end of the push rod and is slidably embedded in the guide groove.

[0015] According to the present invention, in an elastic-thermal cooling system, the guide portion has a spherical structure.

[0016] According to the present invention, a thermoacoustic engine has a pressure output port; the transmission assembly further includes:

[0017] A sliding cavity is arranged along the first direction and connected to the pressure output port;

[0018] The piston is pushed and slidably connected within the sliding cavity, and can reciprocate along the sliding cavity under the push of the thermoacoustic engine;

[0019] One end of the transmission rod is fixedly connected to the push piston, and the end of the push rod away from the connecting part is fixedly connected to the transmission rod.

[0020] According to the present invention, an elastic-thermal cooling system is provided, wherein an auxiliary piston is slidably connected in the sliding cavity, and the auxiliary piston is spaced apart from the pushing piston; the end of the push rod away from the pushing piston is fixedly connected to the auxiliary piston.

[0021] According to the present invention, an elastic-thermal cooling system further includes a sliding track and a slider; the sliding track is arranged along the first direction; the slider is slidably connected to the sliding track; and the end of the elastic-thermal material away from the connecting portion is fixedly connected to the slider.

[0022] According to the present invention, in a thermoacoustic engine, the working fluid is a liquid working fluid.

[0023] According to the present invention, a thermoacoustic refrigeration system is provided, wherein the thermoacoustic engine is a traveling wave thermoacoustic engine or a standing wave thermoacoustic engine.

[0024] According to a thermoacoustic cooling system provided by the present invention, the thermoacoustic engine includes a resonant tube, and a heater, a regenerator and a cooler sequentially disposed within the resonant tube; the working fluid is filled in the resonant tube, and the pressure output port is connected to the resonant tube.

[0025] According to the present invention, in an elastic-thermal cooling system, the resonant tube is a U-shaped tube or a straight tube.

[0026] According to the present invention, a thermo-elastic cooling system is provided on the resonant tube, wherein a pressurization port is provided.

[0027] The elasto-thermal refrigeration system provided by this invention can convert the drive of a thermoacoustic engine into component motions of the elasto-thermal material along a first direction and a second direction through a transmission component. This allows the elasto-thermal material to be stressed or unstressed along the second direction, achieving a phase transformation from martensite to austenite. Furthermore, the elasto-thermal material can reciprocate along the first direction, contacting and exchanging heat with a cold-end or hot-end heat exchanger, thereby achieving the purpose of refrigeration. Compared to existing multi-motor drives, this system simplifies the structure and saves costs. The thermoacoustic engine itself has no moving parts, thus reducing the use of complex moving parts and making the overall elasto-thermal refrigeration system more compact and efficient. In addition, using a thermoacoustic engine that can be driven by low-grade heat as the power generation part of the elasto-thermal refrigeration system improves energy utilization. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this invention 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 invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is one of the structural schematic diagrams of the elastothermal refrigeration system provided in the embodiments of the present invention;

[0030] Figure 2 This is the second schematic diagram of the elastothermal refrigeration system provided in the embodiment of the present invention.

[0031] Figure label:

[0032] 1. Cold end heat exchanger; 2. Hot end heat exchanger; 3. Elastothermic material; 4. Thermoacoustic engine; 40. Traveling wave resonator; 41. Heater; 42. Regenerator; 43. Cooler; 44. Pressurization port; 45. Standing wave resonator; 5. Transmission assembly; 50. Sliding cavity; 51. Push piston; 52. Transmission rod; 53. Push rod; 54. Connecting part; 540. Guide groove; 55. Guide part; 56. Auxiliary piston; 6. Sliding track; 60. Slider. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0034] To facilitate understanding of the elasto-thermal refrigeration system provided by this invention, its application background is first explained. With the development of refrigeration technology, the environmental problems caused by refrigerants have received increasing attention, and the development of new refrigeration technologies has garnered widespread interest. Elastic-thermal refrigeration technology is a green and environmentally friendly refrigeration method that achieves refrigeration through the interconversion of martensite and austenite. In related technologies, most elasto-thermal systems use multiple motors to drive the loading, unloading, and heat exchange of elasto-thermal materials, which suffers from problems such as numerous moving parts, high cost, and complex composition.

[0035] Thermoacoustic engines are thermodynamic machines that can convert heat energy and sound energy into each other. They have the characteristic of having no moving parts, and therefore have the advantages of simple structure, high reliability and long life, which have attracted much attention from the academic and industrial communities.

[0036] Based on the above, the present invention provides an elastic-thermal cooling system to solve the problem that the existing motor-driven elastic-thermal cooling system has many moving parts and a complex composition, so as to optimize the loading method and make the elastic-thermal cooling system more compact and efficient as a whole.

[0037] The following is combined Figures 1-2 The elasto-thermal cooling system of the present invention is described.

[0038] Reference Figure 1 A thermo-elastic cooling system includes a cold-end heat exchanger 1, a hot-end heat exchanger 2, a thermo-elastic material 3, a thermoacoustic engine 4, and a transmission assembly 5; wherein the cold-end heat exchanger 1 and the hot-end heat exchanger 2 are arranged opposite to each other along a first direction, and there is a gap between them; the thermo-elastic material 3 is disposed between the cold-end heat exchanger 1 and the hot-end heat exchanger 2.

[0039] The elastothermal material 3 can reciprocate along the first direction, and it can be stretched or reset along the second direction perpendicular to the first direction. When the elastothermal material 3 is stretched, it moves toward the hot end heat exchanger 2 and comes into contact with the hot end heat exchanger 2, thereby releasing the latent heat of phase change to the outside. When the elastothermal material 3 is reset, it moves toward the cold end heat exchanger 1 and comes into contact with the cold end heat exchanger 1, absorbing external heat to replenish its own latent heat of phase change, thereby achieving the purpose of cooling.

[0040] The thermoacoustic engine 4 is connected to the elastothermal material 3 via a transmission assembly 5. The transmission assembly 5 can convert the drive of the thermoacoustic engine 4 into the partial motion of the elastothermal material 3 along the first direction and the partial motion along the second direction, thereby realizing the stretching, unloading and heat exchange of the elastothermal material 3.

[0041] In practical operation, the transmission component 5 can convert the drive of the thermoacoustic engine 4 into component motions of the elasto-thermal material 3 along the first direction and the second direction, so that the elasto-thermal material 3 can reciprocate along the first direction and be stretched or reset along the second direction at the same time. During the movement of the elasto-thermal material 3 toward the hot end heat exchanger 2, it is gradually stretched along the second direction. The elasto-thermal material 3 undergoes a martensitic phase transformation under stress. The phase transformation process releases latent heat, causing the temperature of the elasto-thermal material 3 to rise. When the elasto-thermal material 3 comes into contact with the hot end heat exchanger 2, it releases heat to the environment. During the movement of the elasto-thermal material 3 toward the cold end heat exchanger 1, the stress is gradually unloaded. The elasto-thermal material 3 recovers its deformation and undergoes a reverse phase transformation. Its internal stress is less than its phase transformation critical stress. Martensite transforms back into austenite. The reverse phase transformation process absorbs heat and the temperature decreases. When the elasto-thermal material 3 comes into contact with the cold end heat exchanger 1, it releases cold energy to the environment to achieve the purpose of refrigeration. Compared to existing multi-motor drives, the structure is simplified and the cost is saved. The thermoacoustic engine 4 itself has no moving parts, thereby reducing the use of complex moving parts and making the overall thermo-elastic cooling system more compact and efficient. In addition, by using the thermoacoustic engine 4, which can be driven by low-grade heat, as the power generation part of the thermo-elastic cooling system, the energy utilization rate is improved.

[0042] Specifically, the thermoacoustic engine 4 has a pressure output port for outputting pressure; the thermoacoustic engine 4 can be selected as a traveling wave thermoacoustic engine or a standing wave thermoacoustic engine according to actual needs. Both can convert thermal energy into mechanical energy of the internal fluid working medium and output it through the pressure output port.

[0043] In one embodiment, reference is made to Figure 1 The traveling wave thermoacoustic engine includes a resonant tube, a heater 41, a regenerator 42, and a cooler 43. The resonant tube is a traveling wave resonant tube 40, which is configured as a U-shaped tube. The heater 41, the regenerator 42, and the cooler 43 are sequentially arranged in the traveling wave resonant tube 40. The heater 41 and the cooler 43 can form a high-temperature end and a low-temperature end at both ends of the regenerator 42, respectively, thereby establishing a temperature gradient in the regenerator 42. When the temperature gradient exceeds the oscillation threshold, the fluid working medium in the system will oscillate.

[0044] Specifically, the circumference of the traveling wave resonator 40 is equal to the wavelength of a sound wave. The pressure output port is connected to the side of the traveling wave resonator 40 and is located near the heater 41. A pressurization port 44 is connected to the traveling wave resonator 40 for connecting to an external pressurization device to pressurize the fluid working medium inside the traveling wave resonator 40. The pressurization device can be selected as a gas pressurization device according to actual needs. The regenerator 42 is a porous medium, and its structure can be parallel flow channels, porous foam, stacked wire mesh, etc. The cooler 43 can be cooled by water cooling, air cooling, or radiant cooling.

[0045] Specifically, to improve the thermoacoustic conversion efficiency, a capacitive or resistive tube can be added to the traveling wave resonator 40. The capacitive tube has a larger cross-sectional area than the traveling wave resonator 40, and the distance between the capacitive tube and the regenerator 42 is equal to one-quarter of the circumference of the traveling wave resonator 40, i.e., one-quarter of the acoustic wavelength. The resistive tube has a smaller cross-sectional area than the traveling wave resonator 40, and the distance between the resistive tube and the regenerator 42 is equal to half the circumference of the traveling wave resonator 40, i.e., half the acoustic wavelength.

[0046] Specifically, the working fluid inside the traveling wave resonator 40 is a liquid. Compared to a gaseous working fluid, the isothermal compressibility of the liquid is much lower. Therefore, under a certain acoustic power output, it can achieve a much larger pressure amplitude than the gaseous working fluid, and correspondingly, the velocity amplitude is also smaller. A sound power flow rate of tens of watts can be accompanied by a pressure amplitude of several megapascals, thus providing a sufficiently large stress drive for the elastothermal material 3. In addition, the liquid has low compressibility, and only a small amount of gas, such as nitrogen, helium, or argon, which does not react with the liquid working fluid, needs to be injected through a pressurization device to rapidly increase the pressure inside the resonator.

[0047] Specifically, the type of liquid working medium can be selected according to actual needs. In this embodiment, the liquid working medium is selected from any one of liquid sodium, mercury, and propylene. Depending on the type of liquid working medium selected, the oscillation temperature and the critical value of the oscillation temperature gradient will also be different. The temperatures of heater 41 and cooler 43 can be adjusted accordingly to achieve the oscillation conditions. In this embodiment, liquid sodium is selected as the liquid working medium, the cooling temperature of cooler 43 is 110°C, and the heating temperature of heater 41 is 480°C, thereby establishing a temperature gradient exceeding the oscillation critical value in the regenerator 42, causing the liquid working medium to oscillate.

[0048] In another embodiment, refer to Figure 2The standing wave thermoacoustic engine includes a resonant tube and a heater 41, a regenerator 42, and a cooler 43 arranged sequentially inside the resonant tube. The difference from the traveling wave thermoacoustic engine mentioned above is that, in this embodiment, the resonant tube is a standing wave resonant tube 45, which is configured as a straight tube structure. The pressure output port is located at one end of the standing wave resonant tube 45, the heater 41 is closer to the end of the standing wave resonant tube 45 than the cooler 43, and the pressurization port 44 is located at the other end of the standing wave resonant tube 45.

[0049] Specifically, to ensure efficient pressure wave output, the assembly consisting of heater 41, regenerator 42, and cooler 43 needs to be offset from the center of the standing wave resonator 45, meaning they need to be close to one end of the standing wave resonator 45. The frequency of the pressure wave depends on the characteristics of the liquid working fluid and the length of the standing wave resonator 45. Therefore, these two can be adjusted according to actual needs to adjust the output pressure wave frequency, ensuring the elastothermal material 3 is in a better working state. In this embodiment, the output frequency of the pressure wave is approximately 5 Hz.

[0050] It is understood that the thermoacoustic engine 4 of the present invention is not limited to the structures listed above. Other thermoacoustic engines 4 with different structures can be applied to the present invention as long as they can provide sufficient stress drive for the elastothermal material 3.

[0051] In actual operation, when the temperature gradient established in the regenerator 42 exceeds the oscillation threshold, the liquid working fluid in the resonant tube will oscillate and output pressure through the pressure output port. The power is then transmitted to the elastothermal material 3 through the transmission component 5, driving the elastothermal material 3 to perform stress loading, stress unloading and heat exchange.

[0052] Reference Figure 1 and Figure 2 The transmission assembly 5 includes a sliding cavity 50, a pushing piston 51, a transmission rod 52, a push rod 53, a connecting part 54, and a guide part 55. The sliding cavity 50 is arranged along a first direction and one end of it is connected to a pressure output port. The pushing piston 51 is slidably connected in the sliding cavity 50. When the liquid working fluid in the thermoacoustic engine 4 oscillates, pressure is output through the pressure output port to push the piston 51 to slide back and forth. One end of the transmission rod 52 is fixedly connected to the pushing piston 51 to provide power output.

[0053] An auxiliary piston 56 is slidably connected inside the sliding cavity 50. The auxiliary piston 56 is spaced apart from the push piston 51, and the end of the transmission rod 52 facing away from the push piston 51 is fixedly connected to the auxiliary piston 56. In this way, the transmission rod 52 can be supported between the push piston 51 and the auxiliary piston 56, which helps to improve the stability of the transmission rod 52.

[0054] The connecting part 54 is slidably connected to the guide part 55, and the movement of the connecting part 54 can be decomposed into a component movement along the first direction and a component movement along the second direction; one end of the elastic-thermal material 3 is slidably restricted in the first direction, and the other end is fixedly connected to the connecting part 54; one end of the push rod 53 is fixedly connected to the transmission rod 52, so that the push rod 53 can reciprocate along the first direction under the drive of the transmission rod 52, and the other end of the push rod 53 is connected to the connecting part 54 for driving the connecting part 54 to move.

[0055] In practical operation, the drive of the thermoacoustic engine 4 is transmitted to the push rod 53 via the transmission rod 52. The push rod 53 drives the connecting part 54 to slide on the guide part 55. The movement of the connecting part 54 can be decomposed into a component movement along the first direction and a component movement along the second direction. While driving the elastothermal material 3 to slide back and forth along the first direction, stress is applied along the second direction to stretch the elastothermal material 3 or unload the stress to restore the deformation of the elastothermal material 3. The cyclic loading and unloading of stress can realize the cyclic transformation of the martensite and austenite phases of the elastothermal material 3, thereby achieving the purpose of cooling.

[0056] Specifically, the connecting part 54 is a slider structure that can slide along the first direction and the second direction. A guide groove 540 is inclinedly provided on the connecting part 54. The guide part 55 is fixedly connected to the end of the push rod 53 away from the transmission rod 52 and is slidably embedded in the guide groove 540. Driven by the transmission rod 52, the push rod 53 can reciprocate along the first direction, thereby driving the guide part 55 to reciprocate along the first direction. Under the guidance of the guide groove 540, the connecting part 54 can move along the second direction while reciprocating along the first direction, thereby realizing the loading, unloading and heat exchange of the stress of the elastothermal material 3.

[0057] Specifically, the guide portion 55 has a spherical structure, which can reduce the frictional resistance between the guide portion 55 and the connecting portion 54, allowing the guide portion 55 to drive the connecting portion 54 more smoothly.

[0058] In another embodiment, the guide part 55 is a slider structure and can slide back and forth along the first direction. The end of the push rod 53 away from the transmission rod 52 is fixedly connected to the guide part 55. The guide part 55 is inclinedly provided with a guide groove 540. The connecting part 54 is slidably embedded in the guide groove 540. The end of the elastic-thermal material 3 is fixedly connected to the connecting part 54. In this way, when the push rod 53 drives the guide part 55 to move back and forth along the first direction, the connecting part 54 can slide along the guide groove 540 and drive the elastic-thermal material 3 to move simultaneously along the first direction and the second direction. The same can also realize the loading, unloading and heat exchange of the stress of the elastic-thermal material 3.

[0059] It is understood that the connecting part 54 and the guiding part 55 of the present invention are not limited to the structures listed above. Other sliding structures, such as sliding guide rails and sliders, optical axis guide rails and linear bearings, can also be applied to the present invention.

[0060] The elasto-thermal cooling system also includes a sliding track 6 and a slider 60; wherein, the sliding track 6 is arranged along a first direction; the slider 60 is slidably connected to the sliding track 6, and the end of the elasto-thermal material 3 away from the push rod 53 is fixedly connected to the slider 60, thereby restricting the sliding of the end of the elasto-thermal material 3 away from the push rod 53 to the first direction, which is beneficial to improving the smoothness of the overall sliding of the elasto-thermal material 3 and the stability of stress loading.

[0061] It is understood that the aforementioned sliding track 6 and slider 60 can also be replaced by sliding guide rods and sleeves, optical axis guide rails and linear bearings, etc. Any structure that can restrict the sliding of the end of the elastothermal material 3 away from the connecting part 54 to the first direction is applicable to the present invention.

[0062] The novelty of this invention lies in the fact that the transmission component 5 can convert the driving force of the thermoacoustic engine 4 into component movements of the elasto-thermal material 3 along a first direction and a second direction. This allows the elasto-thermal material 3 to be subjected to stress or unloaded along the second direction, achieving a phase transformation from martensite to austenite. Furthermore, the elasto-thermal material 3 can reciprocate along the first direction to contact and exchange heat with the cold-end heat exchanger 1 or the hot-end heat exchanger 2, thereby achieving the purpose of cooling. Compared with existing multi-motor drives, this invention simplifies the structure and saves costs. The thermoacoustic engine 4 itself has no moving parts, thus reducing the use of complex moving parts and making the overall elasto-thermal refrigeration system more compact and efficient. In addition, using the thermoacoustic engine 4, which can be driven by low-grade heat, as the power generation part of the elasto-thermal refrigeration system improves energy utilization.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. A thermo-elastic cooling system, characterized in that, include: Cold end heat exchanger (1), hot end heat exchanger (2), elastothermal material (3), thermoacoustic engine (4) and transmission assembly (5); The cold end heat exchanger (1) and the hot end heat exchanger (2) are arranged opposite to each other along a first direction, and the elastothermal material (3) is disposed between the cold end heat exchanger (1) and the hot end heat exchanger (2). The elastic-thermal material (3) can reciprocate along the first direction and can be stretched along the second direction perpendicular to the first direction; when stretched, the elastic-thermal material (3) contacts the hot end heat exchanger (2) to release heat to the outside; when reset, the elastic-thermal material (3) contacts the cold end heat exchanger (1) to release cold energy to the outside. The thermoacoustic engine (4) and the elastothermal material (3) are connected by a transmission assembly (5); the transmission assembly (5) is used to convert the driving force of the thermoacoustic engine (4) into the partial motion of the elastothermal material (3) along the first direction and the partial motion along the second direction.

2. The elastic-thermal cooling system according to claim 1, characterized in that, The transmission assembly (5) includes a push rod (53), a connecting part (54), and a guide part (55); The connecting part (54) is slidably connected to the guide part (55), and the movement of the connecting part (54) can be decomposed into a component movement along the first direction and a component movement along the second direction; One end of the elastothermal material (3) is slidably restricted in the first direction, and the other end is fixedly connected to the connecting part (54); The thermoacoustic engine (4) is connected to the connecting part (54) via the push rod (53) for pushing the connecting part (54) to slide.

3. The elastic-thermal cooling system according to claim 2, characterized in that, The connecting part (54) is provided with an inclined guide groove (540); the guide part (55) is fixed to the end of the push rod (53) and is slidably embedded in the guide groove (540).

4. The elastothermal refrigeration system according to claim 3, characterized in that, The guide part (55) has a spherical structure.

5. The elastic-thermal cooling system according to claim 2, characterized in that, The thermoacoustic engine (4) has a pressure output port; the transmission assembly (5) further includes: A sliding cavity (50) is arranged along the first direction and connected to the pressure output port; The piston (51) is pushed and slidably connected in the sliding cavity (50), and can slide back and forth along the sliding cavity (50) under the push of the thermoacoustic engine (4); One end of the transmission rod (52) is fixedly connected to the push piston (51), and the end of the push rod (53) away from the connecting part (54) is fixedly connected to the transmission rod (52).

6. The thermo-elastic cooling system according to claim 2, characterized in that, It also includes a sliding track (6) and a slider (60); the sliding track (6) is arranged along the first direction; the slider (60) is slidably connected to the sliding track (6); one end of the elastic-thermal material (3) away from the connecting part (54) is fixedly connected to the slider (60) so as to restrict the sliding of the end of the elastic-thermal material (3) away from the connecting part (54) in the first direction.

7. The elastothermal refrigeration system according to claim 1, characterized in that, The working fluid inside the thermoacoustic engine (4) is a liquid working fluid.

8. The elastothermal cooling system according to claim 7, characterized in that, The thermoacoustic engine (4) is a traveling wave thermoacoustic engine or a standing wave thermoacoustic engine.

9. The elastothermal cooling system according to claim 8, characterized in that, The thermoacoustic engine (4) includes a resonant tube, and a heater (41), a regenerator (42) and a cooler (43) arranged sequentially inside the resonant tube; the working fluid is filled in the resonant tube, and the pressure output port is connected to the resonant tube.

10. The elastothermal cooling system according to claim 9, characterized in that, The resonant tube contains either a U-shaped tube or a straight tube.

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