Refrigeration system based on elastocaloric effect

Abstract

The present application relates to the technical field of solid-state refrigeration, and provides a refrigeration system based on the elastic-thermal effect, comprising a heat exchanger, an elastic-thermal material, a thermoacoustic engine and a transmission assembly; the heat exchanger comprises a cold-end heat exchanger and a hot-end heat exchanger oppositely arranged along a first direction; the elastic-thermal material is arranged between the cold-end heat exchanger and the hot-end heat exchanger; the heat exchanger can reciprocate along the first direction, and the elastic-thermal material can be stretched by stress loading along a second direction perpendicular to the first direction; the thermoacoustic engine is in driving connection with the elastic-thermal material and the heat exchanger through the transmission assembly; and the transmission assembly is used for converting the driving of the thermoacoustic engine into the reciprocating motion along the first direction and the loading force along the second direction. Compared with the conventional elastic-thermal refrigeration system driven by an electric motor, the structure is simplified, and the cost is saved; the thermoacoustic engine itself has no moving parts, the use of moving parts is reduced, the elastic-thermal refrigeration system is more compact and efficient; and the thermoacoustic engine can be driven by low-grade heat, so that the energy utilization rate is improved.

Description

Technical Field

[0001] This invention relates to the technical field of solid-state refrigeration, and more particularly to a refrigeration system based on the elasto-thermal effect. Background Technology

[0002] Currently, vapor compression refrigeration technology, which uses refrigerants for cooling, has been widely applied in various fields such as refrigerators and air conditioners. However, the environmental problems caused by the use of refrigerants are becoming increasingly prominent, so the development of new refrigeration technologies has received widespread attention.

[0003] Elastic-thermal refrigeration technology, as a novel solid-state refrigeration technology, does not require the use of refrigerants and therefore has no negative impact on the environment, making it a green and environmentally friendly refrigeration method. When the internal stress of an elastic-thermal material changes, it can undergo interconversion between martensite and austenite, thereby achieving a change in the temperature of the elastic-thermal material itself, thus achieving the purpose of refrigeration.

[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 a refrigeration system based on the elastothermal effect, which reduces the problems of numerous moving parts and complex composition in existing elastothermal refrigeration systems, simplifies the structure of the elastothermal refrigeration system, and makes the overall elastothermal system more compact and efficient.

[0006] This invention provides a refrigeration system based on the elastothermal effect, comprising: a heat exchanger, an elastothermal material, a thermoacoustic engine, and a transmission assembly;

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

[0008] The heat exchanger can reciprocate along a first direction, so that the elastothermal material comes into contact with the cold end heat exchanger or the hot end heat exchanger. The elastothermal material can be stressed and stretched along a second direction perpendicular to the first direction. When the elastothermal material is stretched, it comes into contact with the hot end heat exchanger; when the elastothermal material is reset, it comes into contact with the cold end heat exchanger.

[0009] The thermoacoustic engine is connected to the thermoelastic material and the heat exchanger via the transmission assembly; the transmission assembly is used to convert the drive of the thermoacoustic engine into the partial motion of the heat exchanger along a first direction and the loading force of the thermoelastic material along a second direction.

[0010] According to the present invention, a refrigeration system based on the elastothermal effect is provided, wherein the cold-end heat exchanger and the hot-end heat exchanger are connected as a whole by mechanical connectors.

[0011] According to the present invention, a refrigeration system based on the elastothermal effect is provided, wherein the transmission assembly includes a first push rod, a second push rod, a guide portion, and a connecting portion;

[0012] Both the first push rod and the second push rod are connected to the thermoacoustic engine and can slide back and forth along the second direction under the drive of the thermoacoustic engine;

[0013] One end of the elastothermal material is fixed, and the other end is fixedly connected to the first push rod;

[0014] The guide portion is fixedly connected to the second push rod and is throttle-connected to the connecting portion;

[0015] The connecting part can slide along the first direction, and the force on the connecting part from the guide part can be decomposed into a component force along the first direction;

[0016] The heat exchanger can slide along the first direction and is constrained in the first direction. The connecting part is fixedly connected to the heat exchanger to drive the heat exchanger to reciprocate along the first direction.

[0017] According to the present invention, a refrigeration system based on the elastothermal effect is provided, wherein a guide groove is provided on the connecting part, and the guide groove is set at an angle to the first direction and the second direction;

[0018] The guide portion is constrained within the guide groove and can slide along the guide groove.

[0019] According to the present invention, a refrigeration system based on the elastothermal effect is provided, wherein the guide portion has a spherical structure.

[0020] According to the present invention, a refrigeration system based on the elasto-thermal effect is provided, wherein the thermoacoustic engine has a pressure output port; the transmission assembly further includes:

[0021] A sliding cavity is provided along the second direction and one end is connected to the pressure output port;

[0022] The piston is slidably connected within the sliding cavity;

[0023] One end of the transmission rod is fixedly connected to the piston; the first push rod and the second push rod are fixedly connected to the transmission rod.

[0024] A refrigeration system based on the elasto-thermal effect provided by the present invention further includes:

[0025] The slide rail is provided along the first direction;

[0026] The slider is slidably connected to the slide rail and fixedly connected to at least one of the hot-end heat exchanger, the cold-end heat exchanger, and the mechanical connector.

[0027] According to the present invention, a refrigeration system based on the elasto-thermal effect is provided, wherein the thermoacoustic engine is a traveling wave thermoacoustic engine or a standing wave thermoacoustic engine.

[0028] According to the present invention, a refrigeration system based on the elasto-thermal effect is provided, wherein the thermoacoustic engine includes a resonant tube, and a heater, a regenerator and a cooler are sequentially arranged inside the resonant tube; the resonant tube is used to fill a working fluid, and the pressure output port is connected to the resonant tube.

[0029] According to the present invention, a refrigeration system based on the elastothermal effect is provided, wherein the working fluid in the thermoacoustic engine is a liquid working fluid.

[0030] According to the present invention, a refrigeration system based on the elasto-thermal effect is provided, wherein the resonant tube is a U-shaped tube or a straight tube.

[0031] According to the present invention, a refrigeration system based on the elastothermal effect is provided, wherein the resonant tube is connected to a pressure output port.

[0032] According to the present invention, a refrigeration system based on the elastothermal effect is provided, wherein the pressure output port is located on the same side of the heater.

[0033] The elasto-thermal effect-based refrigeration system provided by this invention can convert the drive of a thermoacoustic engine into a component motion of the heat exchanger along a first direction and a loading force on the elasto-thermal material along a second direction through a transmission component. When the heat exchanger moves along the first direction, bringing the hot-end heat exchanger closer to the elasto-thermal material, the elasto-thermal material is gradually stretched along the second direction, undergoing a martensitic phase transformation and increasing its temperature. Upon contact with the hot-end heat exchanger, the elasto-thermal material releases heat to the environment. Conversely, when the heat exchanger moves along the first direction, bringing the cold-end heat exchanger closer to the elasto-thermal material, the stress applied to the elasto-thermal material is unloaded, causing it to transform from martensite back to austenite, decreasing its temperature, and upon contact with the cold-end heat exchanger, releasing cooling energy to the environment. Compared to traditional multi-motor driven elasto-thermal refrigeration systems, this system simplifies the structure and saves costs. Furthermore, the thermoacoustic engine itself has no moving parts, reducing the use of moving parts and making the elasto-thermal refrigeration system more compact and efficient. Additionally, the thermoacoustic engine can utilize low-grade heat for drive; therefore, using the thermoacoustic engine as the power generator of the elasto-thermal refrigeration system improves energy utilization. Attached Figure Description

[0034] 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.

[0035] Figure 1 This is one of the structural schematic diagrams of a refrigeration system based on the elasto-thermal effect provided in an embodiment of the present invention;

[0036] Figure 2 This is the second schematic diagram of the refrigeration system based on the elastothermal effect provided in the embodiment of the present invention;

[0037] Figure 3 This is the third schematic diagram of the refrigeration system based on the elastothermal effect provided in the embodiments of the present invention.

[0038] Figure label:

[0039] 1. Heat exchanger; 10. Cold end heat exchanger; 11. Hot end heat exchanger; 2. Elastothermic material; 3. Thermoacoustic engine; 30. Standing wave resonant tube; 31. Heater; 32. Regenerator; 33. Cooler; 34. Pressurization port; 35. Traveling wave resonant tube; 4. Transmission assembly; 40. Sliding cavity; 41. Piston; 42. Transmission rod; 43. First push rod; 44. Second push rod; 45. Connecting part; 450. Guide groove; 46. Guide part; 5. Mechanical connector; 6. Slide rail; 7. Slider. Detailed Implementation

[0040] 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.

[0041] To facilitate understanding of the refrigeration system based on the elastothermal effect provided by this invention, its application background is first explained. With the widespread application of vapor compression refrigeration technology, the environmental problems caused by refrigerants are becoming increasingly prominent, and the development of new refrigeration technologies is receiving increasing attention.

[0042] Elastic-thermal refrigeration technology is a new type of solid-state refrigeration technology that does not require the use of refrigerants and therefore does not have a negative impact on the environment. When the internal stress of the elastic-thermal material changes, it can transform between martensite and austenite, causing the temperature of the elastic-thermal material itself to change, thus achieving the purpose of refrigeration.

[0043] Thermoacoustic engines can convert thermoacoustic and acoustic energy into each other. They have no moving parts, and therefore have advantages such as simple structure, high reliability, and long service life.

[0044] Based on the above, the present invention provides a refrigeration system based on the elasto-thermal effect, which reduces the problem of numerous moving parts and complex composition in the existing multi-motor driven elasto-thermal refrigeration system, simplifies the structure of the elasto-thermal refrigeration system, and makes the overall elasto-thermal system more compact and efficient.

[0045] The following is combined Figures 1-3 The present invention describes a refrigeration system based on the elastothermal effect.

[0046] Reference Figure 1 and Figure 2 ,in, Figure 1 This diagram shows a structural schematic of an elastothermal material in a refrigeration system under stress loading. Figure 2 This diagram shows a structural schematic of an elastothermal material in a refrigeration system under stress unloading conditions. Figure 1 and Figure 2 The refrigeration systems in all of them are driven by standing wave thermoacoustic motors.

[0047] A refrigeration system based on the elastothermal effect includes a heat exchanger 1, an elastothermal material 2, a thermoacoustic engine 3, and a transmission assembly 4; wherein the heat exchanger 1 includes a cold-end heat exchanger 10 and a hot-end heat exchanger 11; the cold-end heat exchanger 10 and the hot-end heat exchanger 11 are spaced apart along a first direction; the elastothermal material 2 is disposed between the cold-end heat exchanger 10 and the hot-end heat exchanger 11.

[0048] The heat exchanger 1 can reciprocate along the first direction, allowing the elastothermal material 2 to contact the cold-end heat exchanger 10 or the hot-end heat exchanger 11. The elastothermal material 2 can be subjected to stress stretching or stress unloading and deformation recovery along the second direction perpendicular to the first direction. When the elastothermal material 2 is subjected to stress stretching, it contacts the hot-end heat exchanger 11 to release heat to the external environment. When the elastothermal material 2 is subjected to stress unloading and deformation recovery, it contacts the cold-end heat exchanger 10 to release cold energy to the outside, thereby achieving the purpose of refrigeration.

[0049] The thermoacoustic engine 3 is connected to the elastothermal material 2 and the heat exchanger 1 via a transmission assembly 4. The transmission assembly 4 is used to convert the drive of the thermoacoustic engine 3 into the partial motion of the heat exchanger 1 along the first direction and the loading force of the elastothermal material 2 along the second direction.

[0050] In practical operation, the drive of the thermoacoustic engine 3 can be converted into the partial motion of the heat exchanger 1 along the first direction and the loading force of the elastothermal material 2 along the second direction through the transmission component 4. When the heat exchanger 1 moves along the first direction and the hot end heat exchanger 11 approaches the elastothermal material 2, the elastothermal material 2 is gradually stretched along the second direction and undergoes a martensitic phase transformation. The phase transformation process releases latent heat, causing the temperature of the elastothermal material 2 to rise. When the elastothermal material 2 contacts the hot end heat exchanger 11, it releases heat to the environment.

[0051] As the heat exchanger 1 moves along the first direction and brings the cold end heat exchanger 10 close to the elastothermal material 2, the stress applied to the elastothermal material 2 is unloaded. Because its stress is less than the critical stress of phase transformation, the elastothermal material 2 changes from martensite back to austenite. The reverse phase transformation process absorbs heat to replenish the latent heat of phase transformation. When the elastothermal material 2 comes into contact with the cold end heat exchanger 10, it releases cold energy into the environment to achieve the purpose of refrigeration.

[0052] Compared to traditional multi-motor driven thermo-elastic cooling systems, this system simplifies the structure and saves costs. Furthermore, the thermoacoustic motor 3 itself has no moving parts, thereby reducing the use of moving parts and making the thermo-elastic cooling system more compact and efficient. In addition, the thermoacoustic motor 3 can be driven by low-grade heat. Therefore, using the thermoacoustic motor 3 as the power generation part of the thermo-elastic cooling system improves energy utilization.

[0053] The thermoacoustic engine 3 is equipped with a pressure output port for outputting pressure oscillations. The transmission assembly 4 includes a sliding cavity 40, a piston 41, a transmission rod 42, a first push rod 43, a second push rod 44, a connecting part 45, and a guide part 46. The sliding cavity 40 is arranged along a second direction, and one end of it is connected to the pressure output port. The piston 41 is slidably fitted within the sliding cavity 40, and the pressure oscillations output from the pressure output port can be converted into power for the piston 41, causing the piston 41 to reciprocate along a first direction. The end of the transmission rod 42 is fixedly connected to the piston 41 to provide power output.

[0054] There can be one piston 41 or two pistons spaced apart. When there are two pistons 41 spaced apart, the two ends of the transmission rod 42 are fixedly connected to the two pistons 41 respectively. The two pistons 41 can provide support for the two ends of the transmission rod 42, which helps to improve the stability of the transmission rod 42.

[0055] One end of the first push rod 43 and the second push rod 44 are fixedly connected to the transmission rod 42, so that the transmission rod 42 can drive the first push rod 43 and the second push rod 44 to slide back and forth along the second direction; the elastic-thermal material 2 is arranged along the second direction, one end of which is fixed, and the other end is fixedly connected to the end of the first push rod 43 away from the transmission rod 42, so that the first push rod 43 can slide back and forth along the second direction under the drive of the transmission rod 42, thereby pulling the elastic-thermal material 2 to realize the loading and unloading of stress.

[0056] The cold-end heat exchanger 10 and the hot-end heat exchanger 11 are connected as a whole by mechanical connectors 5, thereby realizing the overall movement of the heat exchanger 1. The mechanical connectors 5 include, but are not limited to, connecting rods, connecting plates and other components. Any component that can connect the cold-end heat exchanger 10 and the hot-end heat exchanger 11 as a whole can be used in this invention.

[0057] The heat exchanger 1 can slide along and be constrained in a first direction. For example, a sliding rail 6 and a slider 7 that cooperate with each other can be used to constrain the sliding direction of the heat exchanger 1. The sliding rail 6 is arranged along the first direction. The slider 7 is slidably connected to the sliding rail 6. The slider 7 can be fixedly connected to at least one of the cold end heat exchanger 10, the hot end heat exchanger 11, and the mechanical connector 5, thereby constraining the heat exchanger 1 as a whole in the first direction. In this embodiment, the slider 7 is fixedly connected to the mechanical connector 5.

[0058] It is understandable that slider 7 and slide rail 6 can be equivalently replaced by guide rod and sleeve, optical axis guide rail and linear bearing, etc. Any structure that can make heat exchanger 1 slide as a whole and be constrained in the first direction is applicable.

[0059] The connecting part 45 can slide along the first direction and is fixedly connected to the heat exchanger 1; the guide part 46 is fixedly connected to the end of the second push rod 44 away from the transmission rod 42, so that the second push rod 44 can drive the guide part 46 to slide back and forth along the second direction; the connecting part 45 is connected to the guide part 46 in a transmission manner. When the guide part 46 slides back and forth along the second direction, it will apply a force to the connecting part 45, and the force applied to the connecting part 45 by the guide part 46 can be decomposed into a component force along the first direction, so as to drive the connecting part 45 to slide back and forth along the first direction, thereby driving the heat exchanger 1 as a whole to move back and forth along the first direction, so that the elastothermal material 2 alternately contacts the cold end heat exchanger 10 and the hot end heat exchanger 11 for heat exchange.

[0060] Specifically, the connecting part 45 is a slider structure and is provided with a guide groove 450. The guide groove 450 is set at an angle with both the first direction and the second direction. The guide part 46 is constrained in the guide groove 450 and can slide along the guide groove 450. When the second push rod 44 drives the guide part 46 to slide back and forth along the second direction, the guide part 46 moves along the extension direction of the guide groove 450 at the same time, thereby driving the connecting part 45 to slide along the first direction.

[0061] Specifically, the guide part 46 has a spherical structure, which is used to reduce the frictional resistance between the guide part 46 and the connecting part 45, so that the guide part 46 can drive the connecting part 45 more smoothly.

[0062] In another embodiment, the guide part 46 is a slider structure and is provided with a guide groove 450. The guide groove 450 is set at an angle to both the first direction and the second direction. The end of the second push rod 44 away from the transmission rod 42 is fixedly connected to the guide part 46, so that the second push rod 44 can drive the guide part 46 to slide back and forth along the first direction. The connecting part 45 is fixedly connected to the heat exchanger 1. The connecting part 45 can move along the first direction and is constrained in the guide groove 450. When the second push rod 44 drives the guide part 46 to move back and forth along the second direction, the connecting part 45 can be driven to move back and forth along the first direction under the action of the guide groove 450, thereby driving the heat exchanger 1 to move back and forth along the first direction, so that the elastothermal material 2 alternately contacts the cold end heat exchanger 10 and the hot end heat exchanger 11 for heat exchange.

[0063] It is understood that the connecting part 45 and the guiding part 46 are not limited to the above-described structure and cooperation method. Other structures that enable the guiding part 46 to drive the connecting part 45 to reciprocate along the first direction can also be applied to the present invention.

[0064] In actual operation, pressure oscillation is output through the pressure output port of thermoacoustic engine 3, driving piston 41 to slide back and forth in sliding chamber 40. Transmission rod 42 drives first push rod 43 and second push rod 44 to slide back and forth in the second direction. Under the action of first push rod 43, stress is loaded or unloaded on elastothermal material 2 in the second direction, realizing phase change conversion of elastothermal material 2. At the same time, second push rod 44 drives guide part 46 to slide back and forth in the second direction. The force applied by guide part 46 to connecting part 45 can be decomposed into component force in the first direction, thereby driving connecting part 45 to reciprocate in the first direction. Driven by connecting part 45, heat exchanger 1 as a whole reciprocates in the first direction, alternately contacting cold end heat exchanger 10 and hot end heat exchanger 11 to achieve a cooling effect.

[0065] Specifically, the thermoacoustic engine 3 can be a traveling wave thermoacoustic engine or a standing wave thermoacoustic engine. Both can convert thermal energy into mechanical energy of the internal fluid working medium and output it through the pressure output port to drive the piston 41 to slide back and forth in the sliding chamber 40.

[0066] In one embodiment, reference is made to Figure 1 and Figure 2 The standing wave thermoacoustic engine includes a resonant tube, a heater 31, a regenerator 32, and a cooler 33. The resonant tube is a standing wave resonant tube 30, which is configured as a straight tube, with the pressure output port located at one end of the standing wave resonant tube 30. The heater 31, the regenerator 32, and the cooler 33 are sequentially arranged inside the standing wave resonant tube 30. The heater 31 and the cooler 33 can respectively form a high-temperature end and a low-temperature end at both ends of the regenerator 32, thereby establishing a temperature gradient within the regenerator 32. When the temperature gradient exceeds the oscillation threshold, the fluid working medium in the system will oscillate, generating pressure fluctuations.

[0067] Specifically, the resonant tube is connected to a pressurization port 34 for pressurizing the internal fluid working medium; the regenerator 32 is a porous medium, and its structure can be parallel flow channels, porous foam, stacked wire mesh, etc. The cooler 33 can be cooled by water cooling, air cooling, or radiant cooling.

[0068] Specifically, the heater 31, the regenerator 32 and the cooler 33 as a whole need to be offset from the middle of the standing wave resonator 30, that is, the three need to be close to one end of the standing wave resonator 30 to ensure efficient output of pressure waves. Regardless of which end of the standing wave resonator 30 the three are close to, the heater 31 is closer to the end of the standing wave resonator 30 than the cooler 33, and the pressure port 34 is located at the other end of the standing wave resonator 30 away from the pressure output port.

[0069] Specifically, the frequency of the pressure wave depends on the characteristics of the working fluid and the length of the standing wave resonator 30. Therefore, according to actual needs, both can be adjusted to adjust the frequency of the output pressure wave to meet the driving requirements. In this embodiment, the output frequency of the pressure wave is around 5 Hz.

[0070] In another embodiment, refer to Figure 3 The traveling wave thermoacoustic engine includes a resonant tube, and a heater 31, a regenerator 32 and a cooler 33 arranged sequentially inside the resonant tube; wherein, the resonant tube is a traveling wave resonant tube 35, which is configured as a loop tube, and the pressure output port is located on one side of the traveling wave resonant tube 35.

[0071] Specifically, the circumference of the traveling wave resonator 35 is equal to the wavelength of a sound wave, the pressure output port is located near the heater 31, and the pressurization port 34 is located near the cooler 33.

[0072] Specifically, to improve the thermoacoustic conversion efficiency, a capacitive or resistive tube can be added to the traveling wave resonator 35. The capacitive tube has a larger cross-sectional area than the traveling wave resonator 35, and the distance between the capacitive tube and the regenerator 32 is equal to one-quarter of the circumference of the traveling wave resonator 35, i.e., one-quarter of the acoustic wavelength. The resistive tube has a smaller cross-sectional area than the traveling wave resonator 35, and the distance between the resistive tube and the regenerator 32 is equal to half the circumference of the traveling wave resonator 35, i.e., half the acoustic wavelength.

[0073] In one specific embodiment, the working fluid within the thermoacoustic engine 3 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 a gaseous working fluid, and correspondingly, its 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 driving force. Furthermore, the liquid has low compressibility; 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 resonant tube.

[0074] The type of liquid working medium can be selected from liquid sodium, mercury, and propylene according to actual needs. 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 temperature of heater 31 and cooler 33 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 33 is 110°C, and the heating temperature of heater 31 is 480°C, thereby establishing a temperature gradient exceeding the oscillation critical value in the regenerator 32, causing the liquid working medium to oscillate.

[0075] The novelty of this invention lies in the fact that the drive of the thermoacoustic engine 3 can be converted into the partial motion of the heat exchanger 1 along the first direction and the loading force of the elastothermal material 2 along the second direction through the transmission component 4. When the heat exchanger 1 moves along the first direction and the hot end heat exchanger 11 approaches the elastothermal material 2, the elastothermal material 2 is gradually stretched along the second direction and undergoes a martensitic phase transformation, and its own temperature rises. After the elastothermal material 2 contacts the hot end heat exchanger 11, it releases heat to the environment. When the heat exchanger 1 moves along the first direction and the cold end heat exchanger 10 approaches the elastothermal material 2, the stress applied to the elastothermal material 2 is unloaded, the elastothermal material 2 changes from martensite back to austenite, its own temperature decreases, and after the elastothermal material 2 contacts the cold end heat exchanger 10, it releases cold energy to the environment. Compared to traditional multi-motor driven thermo-elastic cooling systems, this system simplifies the structure and saves costs. Furthermore, the thermoacoustic motor 3 itself has no moving parts, thereby reducing the use of moving parts and making the thermo-elastic cooling system more compact and efficient. In addition, the thermoacoustic motor 3 can be driven by low-grade heat. Therefore, using the thermoacoustic motor 3 as the power generation part of the thermo-elastic cooling system improves energy utilization.

[0076] 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 refrigeration system based on the elasto-thermal effect, characterized in that, include: Heat exchanger (1), elastothermal material (2), thermoacoustic engine (3) and transmission assembly (4); The heat exchanger (1) includes a cold end heat exchanger (10) and a hot end heat exchanger (11) arranged opposite to each other along a first direction; the elastothermal material (2) is disposed between the cold end heat exchanger (10) and the hot end heat exchanger (11); The heat exchanger (1) can reciprocate along a first direction, so that the elastothermal material (2) contacts the cold end heat exchanger (10) or the hot end heat exchanger (11). The elastothermal material (2) can be subjected to stress and tension along a second direction perpendicular to the first direction. When the elastothermal material (2) is stretched, it contacts the hot end heat exchanger (11); when the elastothermal material (2) is reset, it contacts the cold end heat exchanger (10). The thermoacoustic engine (3) is connected to the thermoelastic material (2) and the heat exchanger (1) via the transmission assembly (4); the transmission assembly (4) is used to convert the driving force of the thermoacoustic engine (3) into the partial motion of the heat exchanger (1) along the first direction and the loading force of the thermoelastic material (2) along the second direction. The transmission assembly (4) includes a first push rod (43), a second push rod (44), a guide (46), and a connecting part (45); The first push rod (43) and the second push rod (44) are both connected to the thermoacoustic engine (3) and can slide back and forth along the second direction under the drive of the thermoacoustic engine (3); One end of the elastothermal material (2) is fixed, and the other end is fixedly connected to the first push rod (43); The guide part (46) is fixedly connected to the second push rod (44) and is drively connected to the connecting part (45); The connecting part (45) can slide along the first direction, and the force on the connecting part (45) from the guide part (46) can be decomposed into a component force along the first direction; The heat exchanger (1) can slide along the first direction and is constrained in the first direction. The connecting part (45) is fixedly connected to the heat exchanger (1) to drive the heat exchanger (1) to reciprocate along the first direction. The connecting part (45) is provided with a guide groove (450), and the guide groove (450) is set at an angle to the first direction and the second direction; The guide portion (46) is constrained within the guide groove (450) and can slide along the guide groove (450).

2. The refrigeration system based on the elasto-thermal effect according to claim 1, characterized in that, The cold end heat exchanger (10) and the hot end heat exchanger (11) are connected as a whole by mechanical connector (5).

3. The refrigeration system based on the elasto-thermal effect according to claim 1, characterized in that, The guide part (46) has a spherical structure.

4. The refrigeration system based on the elasto-thermal effect according to claim 1, characterized in that, The thermoacoustic engine (3) has a pressure output port; the transmission assembly (4) further includes: A sliding cavity (40) is provided along the second direction and one end is connected to the pressure output port; Piston (41) is slidably connected within the sliding cavity (40); One end of the transmission rod (42) is fixedly connected to the piston (41); the first push rod (43) and the second push rod (44) are fixedly connected to the transmission rod (42).

5. The refrigeration system based on the elasto-thermal effect according to claim 4, characterized in that, Also includes: The slide rail (6) is provided along the first direction; The slider (7) is slidably connected to the slide rail (6) and fixedly connected to at least one of the hot end heat exchanger (11), the cold end heat exchanger (10) and the mechanical connector (5).

6. The refrigeration system based on the elasto-thermal effect according to any one of claims 1-5, characterized in that, The thermoacoustic engine (3) is a traveling wave thermoacoustic engine or a standing wave thermoacoustic engine.

7. The refrigeration system based on the elasto-thermal effect according to claim 4, characterized in that, The thermoacoustic engine (3) includes a resonant tube, and a heater (31), a regenerator (32) and a cooler (33) arranged sequentially inside the resonant tube; the resonant tube is used to fill the working fluid, and the pressure output port is connected to the resonant tube.

8. The refrigeration system based on the elasto-thermal effect according to claim 1, characterized in that, The working fluid inside the thermoacoustic engine (3) is a liquid working fluid.

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