Elastic heating refrigerating system

Abstract

The invention relates to the technical field of solid-state refrigeration, and provides an elastic heating refrigeration system which comprises a cold end heat exchanger, a hot end heat exchanger, an elastic heating material, a thermoacoustic engine and a transmission assembly. The cold-end heat exchanger and the hot-end heat exchanger are oppositely arranged in the first direction. The elastic thermal material can reciprocate along a first direction and can be stretched along a second direction; the elastic heat material is in contact with the hot-end heat exchanger during stretching and is in contact with the cold-end heat exchanger during resetting; the thermoacoustic engine is in transmission connection with the elastic thermal material through a transmission assembly; the transmission assembly is used for converting driving of the thermoacoustic engine into component movement of the elastic thermal material in the first direction and the second direction. By means of the arrangement, the structure is simplified, cost is saved, the thermo-acoustic engine is not provided with moving parts, and therefore use of complex moving parts is reduced, and the whole elastic heat refrigerating system is more compact and efficient. In addition, the thermoacoustic engine capable of being driven by low-grade heat is used as a power generation part of the elastic heat refrigerating system, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-state refrigeration systems, and in particular to an elastomeric refrigeration system. Background Art

[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 technology has received widespread attention.

[0003] As a new type of solid-state refrigeration technology, caloric refrigeration technology does not require the use of refrigerants and will not have a negative impact on the environment. It is a green and environmentally friendly refrigeration method. When the internal stress changes, the mutual conversion between martensite and austenite can be achieved, thereby achieving the change of the temperature of the caloric refrigeration material itself.

[0004] In the prior art, the elastic-caloric refrigeration system generally realizes the stretching, unloading and heat exchange of the elastic-caloric material through motor drive, and has many moving parts and a complex composition. Summary of the invention

[0005] The present invention provides an elastic caloric refrigeration system, which is used to reduce the problem of multiple moving parts and complex composition of the motor-driven elastic caloric refrigeration system in the prior art, so as to optimize the loading method and make the elastic caloric refrigeration system more compact and efficient as a whole.

[0006] The present invention provides an elastic-caloric refrigeration system, comprising: a cold-end heat exchanger, a hot-end heat exchanger, an elastic-caloric material, a thermoacoustic engine and a transmission component;

[0007] The cold end heat exchanger and the hot end heat exchanger are arranged opposite to each other along a first direction, and the elastic thermal material is arranged between the cold end heat exchanger and the hot end heat exchanger;

[0008] The thermoelastic material can reciprocate along a first direction and can be stretched along a second direction perpendicular to the first direction; when the thermoelastic material is stretched, it contacts the hot end heat exchanger to release heat to the outside; when the thermoelastic material is reset, it contacts the cold end heat exchanger to release cold to the outside;

[0009] The thermoacoustic engine is connected to the elastocaloric material via the transmission assembly; the transmission assembly is used to convert the drive of the thermoacoustic engine into a partial movement of the elastocaloric material along the first direction and a partial movement along the second direction.

[0010] According to an elastic-caloric refrigeration system provided by the present invention, the transmission assembly includes a push rod, a connecting portion and a guide portion;

[0011] The connecting portion is slidably connected to the guiding portion, and the movement of the connecting portion can be decomposed into a sub-movement along the first direction and a sub-movement along the second direction;

[0012] One end of the elastic thermal material is slidably restricted in the first direction, and the other end is fixedly connected to the connecting portion;

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

[0014] According to an elastic-caloric refrigeration system provided by the present invention, a guide groove is obliquely provided on the connecting portion; the guide portion is fixed to the end of the push rod and is slidably embedded in the guide groove.

[0015] According to an elastic-caloric refrigeration system provided by the present invention, the guide portion is a spherical structure.

[0016] According to an elastomeric refrigeration system provided by the present invention, the thermoacoustic engine has a pressure output port; the transmission assembly further includes:

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

[0018] A push piston is slidably connected in the sliding cavity and can slide back and forth along the sliding cavity under the push of the thermoacoustic engine;

[0019] A transmission rod has one end fixedly connected to the push piston, and an end of the push rod away from the connecting portion is fixedly connected to the transmission rod.

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

[0021] According to the present invention, a thermal refrigeration 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 one end of the thermal refrigeration material away from the connecting portion is fixedly connected to the slider.

[0022] According to an elastomeric refrigeration system provided by the present invention, the working fluid in the thermoacoustic engine is a liquid working fluid.

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

[0024] According to a caloric refrigerant system provided by the present invention, the thermoacoustic engine includes a resonance tube, and a heater, a regenerator and a cooler arranged in the resonance tube in sequence; the working fluid is filled in the resonance tube, and the pressure output port is connected to the resonance tube.

[0025] According to the caloric refrigerant system provided by the present invention, the resonance tube is a meander tube or a straight tube.

[0026] According to an elastic caloric refrigeration system provided by the present invention, a pressurizing port is provided on the resonance tube.

[0027] The elasto-caloric refrigeration system provided by the present invention can convert the drive of the thermoacoustic engine into the sub-movement of the elasto-caloric material in the first direction and the sub-movement in the second direction through the transmission component, so that the elasto-caloric material can be loaded with stress or unloaded with stress in the second direction to achieve its martensite and austenite phase transformation, and the elasto-caloric material can reciprocate in the first direction and contact with the cold end heat exchanger or the hot end heat exchanger for heat exchange, thereby achieving the purpose of refrigeration. Compared with the existing multi-motor drive, the structure is simplified and the cost is saved. The thermoacoustic engine itself has no moving parts, thereby reducing the use of complex moving parts, making the overall elasto-caloric refrigeration system more compact and efficient; in addition, the thermoacoustic engine that can be driven by low-grade heat is used as the power generation part of the elasto-caloric refrigeration system, which improves energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is one of the structural schematic diagrams of the elastic caloric refrigeration system provided in an embodiment of the present invention;

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

[0031] Reference numerals:

[0032] 1. Cold end heat exchanger; 2. Hot end heat exchanger; 3. Elastic heat material; 4. Thermoacoustic engine; 40. Traveling wave resonance tube; 41. Heater; 42. Regenerator; 43. Cooler; 44. Pressurization port; 45. Standing wave resonance tube; 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. Sliding block. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to facilitate the understanding of the elastic-caloric refrigeration system provided by the present invention, its application background is first explained. With the development of refrigeration technology, the environmental problems caused by refrigerants have also received increasing attention, and the development of new refrigeration technology has received widespread attention. Elastic-caloric refrigeration technology is a green and environmentally friendly refrigeration method that achieves the purpose of refrigeration through the mutual conversion of martensite and austenite. In related technologies, most elastic-caloric systems use multiple motors to cooperate with each other to realize the loading, unloading and heat exchange of elastic-caloric materials, which have problems such as many moving parts, high cost, and complex composition.

[0035] A thermoacoustic engine is a thermal machine that can realize the mutual conversion between thermal energy and acoustic energy. It has the characteristics of no moving parts and thus has the advantages of simple structure, high reliability and long life, and has attracted much attention from academia and industry.

[0036] Based on the above, the present invention provides an elastic thermal refrigeration system to solve the problem of multiple moving parts and complex composition of the motor-driven elastic thermal refrigeration system in the prior art, so as to optimize the loading method and make the elastic thermal refrigeration system more compact and efficient as a whole.

[0037] Combine the following Figure 1-Figure 2 The elastomeric refrigeration system of the present invention is described.

[0038] Reference Figure 1 A thermoelastic refrigeration system comprises a cold-end heat exchanger 1, a hot-end heat exchanger 2, a thermoelastic 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 distance between them; the thermoelastic material 3 is arranged between the cold-end heat exchanger 1 and the hot-end heat exchanger 2.

[0039] The thermoelastic material 3 can reciprocate along a first direction, and can be stretched or reset along a second direction perpendicular to the first direction; when the thermoelastic material 3 is stretched, it moves toward the hot-end heat exchanger 2 and contacts the hot-end heat exchanger 2, thereby releasing the latent heat of phase change to the outside; when the thermoelastic material 3 is reset, it moves toward the cold-end heat exchanger 1 and contacts the cold-end heat exchanger 1, absorbing external heat to supplement its own latent heat of phase change, thereby achieving the purpose of refrigeration.

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

[0041] In actual work, the transmission component 5 can convert the drive of the thermoacoustic engine 4 into a partial movement of the elastic thermomaterial 3 along the first direction and the partial movement of the second direction, so that the elastic thermomaterial 3 can reciprocate along the first direction and be stretched or reset along the second direction at the same time; in the process of the elastic thermomaterial 3 moving toward the hot-end heat exchanger 2, it is gradually stretched along the second direction at the same time, and the elastic thermomaterial 3 undergoes a martensitic phase transformation under stress, and the latent heat released during the phase transformation causes the temperature of the elastic thermomaterial 3 to rise. When the elastic thermomaterial 3 contacts the hot-end heat exchanger 2, it releases heat to the environment; in the process of the elastic thermomaterial 3 moving toward the cold-end heat exchanger 1, the stress is gradually unloaded, the elastic thermomaterial 3 recovers its deformation and undergoes a reverse phase transformation, and its internal stress is less than its critical stress of phase transformation, and martensite turns back to austenite. The reverse phase transformation process absorbs heat and the temperature decreases. When the elastic thermomaterial 3 contacts the cold-end heat exchanger 1, it releases cold to the environment to achieve the purpose of refrigeration. Compared with the existing multi-motor drive, 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 elastic thermal refrigeration system more compact and efficient. In addition, the thermoacoustic engine 4 that can be driven by low-grade heat is used as the power generating part of the elastic thermal refrigeration system, which improves energy utilization.

[0042] Specifically, the thermoacoustic engine 4 has a pressure output port for outputting pressure; the thermoacoustic engine 4 can use a traveling wave thermoacoustic engine or a standing wave thermoacoustic engine according to actual needs, both of which 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, referring to Figure 1 The traveling wave thermoacoustic engine includes a resonance tube, a heater 41, a regenerator 42 and a cooler 43; wherein the resonance tube is a traveling wave resonance tube 40, which is configured as a loop tube; the heater 41, the regenerator 42 and the cooler 43 are sequentially arranged in the traveling wave resonance tube 40, and 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, and when the temperature gradient exceeds the oscillation critical value, the fluid working medium in the system will oscillate.

[0044] Specifically, the circumference of the traveling wave resonance tube 40 is equal to the wavelength of a sound wave, and the pressure output port is connected to the side of the traveling wave resonance tube 40 and is arranged close to the heater 41; the traveling wave resonance tube 40 is connected to a pressurizing port 44 for connecting to an external pressurizing device to pressurize the fluid working medium in the traveling wave resonance tube 40, and the pressurizing device can be selected as a gas pressurizing 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 achieve cooling by water cooling, air cooling, or radiation cooling.

[0045] Specifically, in order to improve the thermal-acoustic conversion efficiency, a capacitive tube or a resistive tube may be added to the traveling wave resonance tube 40; wherein the cross-sectional area of ​​the capacitive tube is larger than the cross-sectional area of ​​the traveling wave resonance tube 40, and the distance between the capacitive tube and the regenerator 42 is equal to one-fourth of the circumference of the traveling wave resonance tube 40, that is, one-fourth of the wavelength of the sound wave. The cross-sectional area of ​​the resistive tube is smaller than the cross-sectional area of ​​the traveling wave resonance tube 40, and the distance between the resistive tube and the regenerator 42 is equal to one-half of the circumference of the traveling wave resonance tube 40, that is, one-half of the wavelength of the sound wave.

[0046] Specifically, the fluid working medium in the traveling wave resonance tube 40 is a liquid working medium. Compared with the gas working medium, the isothermal compressibility of the liquid working medium is much lower than that of the gas working medium. Therefore, under a certain acoustic power output, a much larger pressure amplitude can be obtained than that of the gas working medium, and the velocity amplitude is correspondingly smaller than that of the gas working medium. The acoustic power flow rate of tens of watts can be accompanied by a pressure amplitude of several megapascals, thereby providing a sufficiently large stress drive for the elastocaloric material 3. In addition, the compressibility of the liquid is low, and only a small amount of gas, such as nitrogen, helium or argon, which does not react with the liquid working medium, needs to be injected through a pressurizing device to rapidly increase the pressure in the resonance tube.

[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 starting temperature and the critical value of the starting temperature gradient will also be different. The temperature of the heater 41 and the cooler 43 can be adaptively adjusted to achieve the starting condition. In this embodiment, the liquid working medium is liquid sodium, the cooling temperature of the cooler 43 is 110°C, and the heating temperature of the heater 41 is 480°C, so that a temperature gradient exceeding the critical value of the starting temperature is established in the regenerator 42, so that the liquid working medium oscillates.

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

[0049] Specifically, in order to ensure efficient output of the pressure wave, the set of the heater 41, the regenerator 42 and the cooler 43 needs to be deviated from the middle of the standing wave resonance tube 45, that is, the three need to be close to one of the ends of the standing wave resonance tube 45. The frequency of the pressure wave depends on the characteristics of the liquid working medium and the length of the standing wave resonance tube 45. Therefore, according to actual needs, the two can be adjusted to adjust the output pressure wave frequency, so that the elastic thermal material 3 is in a better working state. In this embodiment, the output frequency of the pressure wave is about 5 Hz.

[0050] It is understandable that the thermoacoustic engine 4 of the present invention is not limited to the structures listed above, and thermoacoustic engines 4 of other structures are applicable to the present invention as long as they can provide sufficient stress drive for the elastocaloric material 3.

[0051] In actual work, when the temperature gradient established in the regenerator 42 exceeds the critical value for oscillation, the liquid working medium in the resonance tube will oscillate, and output pressure through the pressure output port, and transmit power to the elastic thermostatic material 3 through the transmission component 5, driving the elastic thermostatic material 3 to realize stress loading, stress unloading and heat exchange.

[0052] Reference Figure 1 and Figure 2 The transmission assembly 5 includes a sliding chamber 50, a pushing piston 51, a transmission rod 52, a push rod 53, a connecting portion 54 and a guide portion 55; wherein the sliding chamber 50 is arranged along the first direction and one end thereof is connected to the pressure output port; the pushing piston 51 is slidably connected in the sliding chamber 50, and when the liquid working medium in the thermoacoustic engine 4 oscillates, the pressure output through the pressure output port pushes the piston 51 to slide back and forth; one end of the transmission rod 52 is fixedly connected to the pushing piston 51 for providing power output.

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

[0054] The connecting portion 54 is slidably connected to the guide portion 55, and the movement of the connecting portion 54 can be decomposed into a sub-movement along the first direction and a sub-movement along the second direction; one end of the elastic thermal material 3 is slidingly restricted in the first direction, and the other end is fixedly connected to the connecting portion 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 driven by the transmission rod 52, and the other end of the push rod 53 is transmission-connected to the connecting portion 54, for driving the connecting portion 54 to move.

[0055] In actual work, the drive of the thermoacoustic engine 4 is transmitted to the push rod 53 through the transmission rod 52. The push rod 53 drives the connection part 54 to slide on the guide part 55. The movement of the connection part 54 can be decomposed into a sub-movement along the first direction and a sub-movement along the second direction. While driving the elastic thermoelectric material 3 to slide back and forth along the first direction, stress is loaded along the second direction to stretch the elastic thermoelectric material 3 or stress is unloaded to restore the deformation of the elastic thermoelectric material 3. The cyclic loading and unloading of stress can realize the cycle of martensite and austenite phase transformation of the elastic thermoelectric material 3, thereby achieving the purpose of refrigeration.

[0056] Specifically, the connecting portion 54 is a slider structure and can slide in the first direction and the second direction. A guide groove 540 is obliquely provided on the connecting portion 54. The guide portion 55 is fixedly connected to one 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 in the first direction, thereby driving the guide portion 55 to reciprocate in the first direction. Under the guidance of the guide groove 540, the connecting portion 54 can move in the second direction while reciprocating in the first direction, thereby realizing the stress loading, unloading and heat exchange of the elastic thermo material 3.

[0057] Specifically, the guide portion 55 is a spherical structure, which can reduce the friction resistance between the guide portion 55 and the connecting portion 54, so that the guide portion 55 can drive the connecting portion 54 more smoothly.

[0058] In another embodiment, the guide portion 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 portion 55, and a guide groove 540 is obliquely provided on the guide portion 55; the connecting portion 54 is slidably embedded in the guide groove 540, and the end of the elastic thermo material 3 is fixedly connected to the connecting portion 54. In this way, when the push rod 53 drives the guide portion 55 to reciprocate along the first direction, the connecting portion 54 can slide along the guide groove 540 and drive the elastic thermo material 3 to move in the first direction and the second direction at the same time, and the stress loading, unloading and heat exchange of the elastic thermo material 3 can also be realized.

[0059] It is understandable that the connecting portion 54 and the guiding portion 55 of the present invention are not limited to the above-mentioned structures, and other sliding structures such as sliding-fitting guide rails and sliders, optical axis guide rails and linear bearings can also be applied to the present invention.

[0060] The elastic-caloric refrigeration system also includes a sliding track 6 and a slider 60; wherein the sliding track 6 is arranged along the first direction; the slider 60 is slidably connected to the sliding track 6, and the end of the elastic-caloric material 3 away from the push rod 53 is fixedly connected to the slider 60, so that the sliding of the end of the elastic-caloric material 3 away from the push rod 53 can be limited to the first direction, which is beneficial to improving the smoothness of the overall sliding of the elastic-caloric material 3 and the stability of stress loading.

[0061] It is understandable that the above-mentioned sliding rail 6 and slider 60 can also be replaced by a sliding guide rod and sleeve, an optical axis guide rail and a linear bearing, etc. As long as the structure can limit the sliding of one end of the elastic thermal material 3 away from the connecting part 54 to the first direction, it can be applicable to the present invention.

[0062] The novelty of the present invention is that the transmission component 5 can convert the drive of the thermoacoustic engine 4 into the sub-movement of the elastic thermoelectric material 3 along the first direction and the sub-movement of the second direction, so that the elastic thermoelectric material 3 can be loaded with stress or unloaded with stress along the second direction to achieve the phase transformation of its martensite and austenite, and the elastic thermoelectric material 3 can reciprocate along the first direction and contact and exchange heat with the cold end heat exchanger 1 or the hot end heat exchanger 2, thereby achieving the purpose of refrigeration. Compared with the existing multi-motor drive, 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, making the overall elastic thermoelectric refrigeration system more compact and efficient; in addition, the thermoacoustic engine 4 that can be driven by low-grade heat is used as the power generation part of the elastic thermoelectric refrigeration system, which improves the energy utilization rate.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A caloric refrigeration system, characterized in that: include: A cold end heat exchanger (1), a hot end heat exchanger (2), an elastic thermal material (3), a thermoacoustic engine (4) and a transmission component (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 elastic thermal material (3) is arranged between the cold-end heat exchanger (1) and the hot-end heat exchanger (2); The thermoelastic material (3) can reciprocate along a first direction and can be stretched along a second direction perpendicular to the first direction; when the thermoelastic material (3) is stretched, it contacts the hot end heat exchanger (2) to release heat to the outside; when the thermoelastic material (3) is reset, it contacts the cold end heat exchanger (1) to release cold to the outside; The thermoacoustic engine (4) and the elastic thermal material (3) are connected in transmission via the transmission component (5); the transmission component (5) is used to convert the drive of the thermoacoustic engine (4) into a partial movement of the elastic thermal material (3) along the first direction and a partial movement along the second direction.

2. The caloric refrigerant system according to claim 1, characterized in that: The transmission assembly (5) comprises a push rod (53), a connecting portion (54) and a guide portion (55); The connecting portion (54) is slidably connected to the guiding portion (55), and the movement of the connecting portion (54) can be decomposed into a sub-movement along the first direction and a sub-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 portion (54); The thermoacoustic engine (4) is transmission-connected to the connecting portion (54) via the push rod (53), and is used to push the connecting portion (54) to slide.

3. The caloric refrigerant system according to claim 2, characterized in that: A guide groove (540) is obliquely arranged on the connecting portion (54); the guide portion (55) is fixed to the end of the push rod (53) and is slidably embedded in the guide groove (540).

4. The caloric refrigerant system according to claim 3, characterized in that: The guide portion (55) is a spherical structure.

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

6. The caloric refrigerant 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); and one end of the elastic thermal material (3) away from the connecting portion (54) is fixedly connected to the slider (60) so as to limit the sliding of the end of the elastic thermal material (3) away from the connecting portion (54) in the first direction.

7. The caloric refrigerant system according to claim 1, characterized in that: The working fluid in the thermoacoustic engine (4) is a liquid working fluid.

8. The caloric refrigerant 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 caloric refrigerant system according to claim 8, characterized in that: The thermoacoustic engine (4) comprises a resonance tube, and a heater (41), a regenerator (42) and a cooler (43) which are sequentially arranged in the resonance tube; the working fluid is filled in the resonance tube, and the pressure output port is connected to the resonance tube.

10. The caloric refrigerant system according to claim 9, characterized in that: The resonance tube is a meander tube or a straight tube.

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