Refrigeration and heating device based on shape-memory alloy

Abstract

Provided in the present application is a refrigeration and heating device based on a shape-memory alloy, comprising several heat transfer components which transmit heat by means of a fluid. When a plurality of heat transfer components are provided, fluid channels of any two heat transfer components are optionally in communication. Each heat transfer component comprises one or more pipe sections, wherein each pipe section is made of a shape-memory alloy, and has a cavity penetrating the pipe section in the axial direction thereof; alternatively, each heat transfer component comprises a cylinder and one or more pipe sections which are arranged in the cylinder and are made of a shape-memory alloy, wherein a flow cavity allowing the fluid to pass through same is formed between an inner circumferential wall of the cylinder and each pipe section. When a plurality of pipe sections are provided, the plurality of pipe sections are arranged in a linear direction, and the axial direction of each pipe section is parallel to the linear direction. When each pipe section is loaded or unloaded, the pipe section undergoes a phase change or an inverse phase change so as to implement heating or cooling; and at the same time, the fluid flows through the cavity or flows through the flow cavity, thereby collecting heat or cold energy, such that the ambient temperature is increased or reduced, and the heating or refrigerating effect is achieved. The refrigeration and heating device based on a shape-memory alloy provided in the present application can improve the heat transfer efficiency between the shape-memory alloy and the fluid, thereby ensuring the temperature control efficiency of the refrigeration and heating device.

Description

Refrigeration and heating devices based on shape memory alloys

[0001] This patent application claims priority to patent application number CN202410171608.4, filed on February 6, 2024, entitled "Cooling and Heating Device Based on Shape Memory Alloy," and Chinese patent application number CN202420285802.0, filed on February 6, 2024, and Chinese patent application number CN202410171598.4, filed on February 6, 2024. The disclosures of the prior applications are incorporated herein by reference in their entirety. Technical Field

[0002] The present application belongs to the field of space temperature control technology, and specifically relates to a cooling and heating device based on shape memory alloy. Background Art

[0003] Cooling and heating spaces are important for maintaining a high quality of life in modern times. This includes using air conditioners to raise or lower the temperature of the surrounding space, or using refrigerators to store items in the interior space at low temperatures. The most common cooling and heating method is the traditional vapor compression method, which uses a compressor, evaporator, and condenser to produce a "gas-liquid" phase change of a chemical refrigerant (such as Freon, which is a fluorine, chlorine, and bromine derivative of saturated hydrocarbons).

[0004] Under the strategic background of sustainable development, the aforementioned cooling and heating methods have exposed many problems: first, the decomposition products of the chlorine-containing chemical refrigerants used will be discharged into the environment in large quantities, damaging the ozone layer in the atmosphere and causing irreversible damage to the atmosphere; and although the existing environmentally friendly refrigerants (such as fluorine- and ammonia-containing refrigerants) have reduced the harm to the ozone layer, they still have a high greenhouse effect. Second, chemical refrigerants have the disadvantages of being flammable and explosive, and there are great safety risks when used in the high-temperature and high-pressure working environment of the compressor; third, the traditional steam compression method for cooling and heating has low energy conversion efficiency (low energy efficiency ratio), resulting in waste of electricity.

[0005] With the rapid development of science and technology, shape memory alloys, as a new type of intelligent alloy material, are gradually being used as solid refrigerants in refrigeration systems. Specifically, shape memory alloys have a reversible thermoelastic solid-state phase transition (a thermoelastic solid-state phase transition between two solid phases, "austenite phase" and "martensite phase"). That is, under certain temperature conditions, when stress is applied (loaded), the shape memory alloy transforms from the austenite phase to the martensite phase and releases a certain amount of phase change latent heat, producing a heating effect; during the process of removing stress (unloading), the shape memory alloy transforms from the martensite phase to the austenite phase and absorbs a certain amount of phase change latent heat, producing a cooling effect; and along with this reversible thermoelastic solid-state phase transition process, the shape memory alloy will release or absorb a certain amount of phase change latent heat. Applying this phase change latent heat in space temperature control can replace the gas-liquid phase transition of compressed steam, thereby eliminating the use of chemical refrigerants and the resulting environmental, energy-consuming, and unsafe problems.

[0006] The cooling and heating process based on shape memory alloys includes: first, at a certain temperature (T0), loading causes the shape memory alloy to undergo a martensitic phase transformation (austenite phase transforms into martensite phase), releasing the phase transformation latent heat, so that the shape memory alloy is heated to T1; then, the heat is transferred to the environment through heat exchange, so that the ambient temperature increases, achieving the heating effect of the environment, and the temperature of the shape memory alloy itself cools down to T0 or close to T0; then, unloading causes the shape memory alloy to undergo a reverse phase transformation (martensite phase transforms into austenite phase), which needs to absorb the phase transformation latent heat from the environment, causing the shape memory alloy itself to be cooled down to T2 (T2 < T0), and the ambient temperature is lowered through heat exchange, achieving the cooling effect of the environment, and the temperature of the shape memory alloy itself is heated up to T0 or close to T0; among them, since shape memory alloys cannot flow into two environments for heat exchange like compressed steam, the cooling and heating system based on shape memory alloys requires a heat transfer medium for heat exchange, and the most common heat transfer medium is fluid.

[0007] The inventors found that the existing shape memory alloy has a single structure and low heat exchange efficiency between it and the fluid, which ultimately leads to low temperature control efficiency of the cooling and heating system based on the shape memory alloy, which is not conducive to market popularization and long-term use. Technical issues

[0008] The embodiment of the present application provides a cooling and heating device based on a shape memory alloy, which aims to improve the heat transfer efficiency between the shape memory alloy and the fluid to ensure the temperature control efficiency of the cooling and heating device, and solve the technical problem that the existing shape memory alloy has a single structure, the heat exchange efficiency between it and the fluid is low, and ultimately leads to low temperature control efficiency of the cooling and heating system based on the shape memory alloy, which is not conducive to market popularization and long-term use. Technical Solutions

[0009] To achieve the above objectives, the technical solution adopted in this application is:

[0010] In the first aspect, the present application provides a cooling and heating device based on shape memory alloy, including a heat transfer component, wherein the heat transfer component includes a pipe segment made of shape memory alloy material, and the pipe segment has a cavity that runs through its own axis and is used for fluid to pass through. When the pipe segment is loaded or unloaded to generate heat or cold, the fluid flows in the cavity to transfer heat or cold.

[0011] In combination with the first aspect, in a possible implementation, the heat transfer components are provided in one or more groups. When there are multiple groups of heat transfer components, the fluid channels of any two groups of the heat transfer components are optionally connected.

[0012] In combination with the first aspect, in a possible implementation, the pipe segment is provided with one or more pipe segments. When there are multiple pipe segments, the multiple pipe segments are arranged along a straight line, and the axial direction of each pipe segment is parallel to the straight line direction; and the two adjacent cavities along the straight line direction are connected.

[0013] In combination with the first aspect, in a possible implementation, the heat transfer component further includes: two flow guides, which are arranged at intervals along the straight line direction at both ends of one or more of the pipe segments, and each has a through cavity extending from the end face of the adjacent pipe segment to the outer peripheral wall of the flow guide; wherein, when there is only one pipe segment, the two through cavities are respectively connected to the two ends of the cavity; when there are multiple pipe segments, the two through cavities are respectively connected to the two cavities at the ends.

[0014] In combination with the first aspect, in a possible implementation, the heat transfer component also includes: two fixing parts, which are arranged at intervals on both sides of the two guide parts along the straight line direction; one of the fixing parts is connected to the guide part located on the same side, and the other fixing part is provided with a driving element, which is transmission-connected to the guide part located on the same side, and the axial direction of the power output shaft of the driving element is parallel to the straight line direction.

[0015] In combination with the first aspect, in a possible implementation, the two fixing members are connected via a plurality of connecting rods.

[0016] In combination with the first aspect, in a possible implementation, the axial direction of each connecting rod is parallel to the straight line direction.

[0017] In combination with the first aspect, in a possible implementation, the cooling and heating device further includes: a plurality of collars, all of which are sleeved on the pipe section.

[0018] In combination with the first aspect, in a possible implementation, the heat transfer component also includes: a support seat, which is used to be fixed on a plane, and the upper side thereof has a first limiting groove, and the first limiting groove passes through both ends of the support seat along the straight line direction; wherein the pipe section and the ring are both arranged in the first limiting groove, and the outer peripheral wall of the ring abuts against the inner wall of the first limiting groove.

[0019] In combination with the first aspect, in a possible implementation, when there are multiple pipe segments, two adjacent pipe segments along the straight line direction are connected through a connecting piece; wherein, the connecting piece has a plurality of through holes that pass through along the straight line direction, and each of the through holes is connected to the cavity of the two adjacent pipe segments.

[0020] In combination with the first aspect, in a possible implementation manner, the thermal conductivity of the connecting piece is smaller than the thermal conductivity of the pipe segment.

[0021] In combination with the first aspect, in a possible implementation, the strength limit of the connecting member is higher than the strength limit of the pipe segment.

[0022] In combination with the first aspect, in a possible implementation, the elastic modulus of the connecting member is higher than the elastic modulus of the pipe segment.

[0023] In combination with the first aspect, in a possible implementation, the heat transfer component further includes: a cylinder, coaxially sleeved on the outer circumference of the pipe segment, so that a flow cavity for fluid to pass through is formed between the inner circumferential wall of the cylinder and the outer circumferential wall of the pipe segment; wherein, when there is only one pipe segment, the flow cavity is optionally connected to the cavity; when there are multiple pipe segments, the flow cavity is optionally connected to one or more of the cavities.

[0024] In combination with the first aspect, in a possible implementation, the thermal conductivity of the cylinder is smaller than the thermal conductivity of the pipe segment.

[0025] In a second aspect, the present application also provides a cooling and heating device based on shape memory alloy, comprising a heat transfer component, wherein the heat transfer component comprises: a cylinder and a pipe segment made of shape memory alloy; the cylinder is sleeved on the outer periphery of the pipe segment, and a flow cavity for fluid to pass through is formed between the inner peripheral wall of the cylinder and the outer peripheral wall of the pipe segment; when the pipe segment is loaded or unloaded to generate heat or cold, the fluid flows through the flow cavity to transfer heat or cold.

[0026] In combination with the second aspect, in a possible implementation, the cylinder has a plurality of water holes that are connected to the flow cavity and are used for allowing fluid to pass through.

[0027] In combination with the second aspect, in a possible implementation, the heat transfer components are provided in one or more groups. When there are multiple groups of heat transfer components, the fluid channels of any two groups of the heat transfer components are optionally connected.

[0028] In combination with the second aspect, in a possible implementation, the pipe segment is provided with one or more pipe segments. When there are multiple pipe segments, the multiple pipe segments are arranged along a straight line, and two adjacent pipe segments along the straight line are connected.

[0029] In combination with the second aspect, in a possible implementation, the thermal conductivity of the cylinder is smaller than the thermal conductivity of the pipe segment.

[0030] In combination with the second aspect, in a possible implementation, the heat transfer component also includes: two fixing parts, which are arranged on both sides of the cylinder at intervals along the axial direction of the cylinder, and the two fixing parts are respectively connected to the two ends of the cylinder; one of the fixing parts is provided with a driving element, and the driving element is transmission-connected to the end of the pipe section located on the same side, and the axial direction of the power output shaft of the driving element is parallel to the straight line direction.

[0031] In combination with the second aspect, in a possible implementation, adjacent sides of the two fixing members are fixedly connected with sleeves, the axial direction of the sleeves is parallel to the straight line direction, and the sleeves are used for inserting the ends of the pipe sections on the same side; the sleeves have a reserved opening for fluid to pass through, and the power output shaft of the driving element is inserted into the sleeves on the same side and extends out to load or unload the pipe sections inserted into the sleeves.

[0032] In combination with the second aspect, in a possible implementation, the two fixing members are connected via a plurality of connecting rods.

[0033] In combination with the second aspect, in a possible implementation, the axial direction of each connecting rod is parallel to the straight line direction.

[0034] In combination with the second aspect, in a possible implementation, the cooling and heating device further includes: a plurality of collars, all of which are sleeved on the pipe section.

[0035] In combination with the second aspect, in a possible implementation, the pipe segment has a cavity that runs through its own axis and is used for fluid to pass through; when there are multiple pipe segments, two adjacent cavities along the straight line direction are connected; wherein, when there is only one pipe segment, the flow cavity is optionally connected to the cavity; when there are multiple pipe segments, the flow cavity is optionally connected to one or more of the cavities.

[0036] In combination with the second aspect, in a possible implementation, the heat transfer component also includes: two flow guides, which are arranged at intervals at both ends of the pipe segment along the straight line direction, and each has a through cavity that passes through the end face of the adjacent pipe segment to the outer peripheral wall of the flow guide and is connected to the flow cavity; wherein, when there is only one pipe segment, the two through cavities are respectively connected to the two ends of the cavity; when there are multiple pipe segments, the two through cavities are respectively connected to the two cavities at the ends.

[0037] In combination with the second aspect, in a possible implementation, when there are multiple pipe segments, two adjacent pipe segments along the straight line direction are connected through a connecting piece; wherein, the connecting piece has a plurality of through holes that pass through along the straight line direction, and each of the through holes is connected to the cavity of the two adjacent pipe segments.

[0038] In combination with the second aspect, in a possible implementation, the thermal conductivity of the connecting piece is smaller than the thermal conductivity of the pipe segment.

[0039] In combination with the second aspect, in a possible implementation, the strength limit of the connecting member is higher than the strength limit of the pipe segment.

[0040] In combination with the second aspect, in a possible implementation, the elastic modulus of the connecting member is higher than the elastic modulus of the pipe segment. Beneficial effects

[0041] In the shape memory alloy-based cooling and heating devices provided in the first and second aspects of the present application, the function of the heat transfer component is to generate heat or cold that can be transferred by the fluid. On the one hand, when the force is loaded, the heat is released to heat the fluid, and the fluid transfers the heat to other heat exchange devices for heat exchange, thereby achieving a heating effect on the environment through heat exchange; on the other hand, when the force is unloaded, the heat is absorbed, that is, cold is generated to cool the fluid, and the fluid transfers the cold to other heat exchange devices for heat exchange, thereby achieving a cooling effect on the environment through heat exchange.

[0042] In the shape memory alloy-based cooling and heating device provided in the first aspect, the heat transfer component comprises one or more tube segments made of shape memory alloy and having axially extending cavities for fluid passage. Therefore, during heat transfer, the fluid directly contacts the inner wall of the tube segment's cavity, effectively ensuring heat transfer efficiency. Furthermore, the use of a structure comprised of multiple tube segments prevents buckling of the shape memory alloy, improving the device's anti-buckling performance, ensuring its structural stability, and extending its service life.

[0043] In the shape memory alloy-based cooling and heating device provided in the second aspect, the heat transfer component includes a cylinder and one or more tube segments disposed within the cylinder, the tube segments being made of shape memory alloy. A flow cavity for fluid passage is formed between the inner circumferential wall of the cylinder and the tube segments, and the cylinder has water holes connected to the flow cavity for fluid passage. Therefore, during the heat transfer process, the fluid directly contacts the outer wall of the tube segments, effectively ensuring the heat transfer efficiency of the fluid. Furthermore, the use of a structure composed of multiple tube segments can prevent the shape memory alloy from buckling, thereby improving the device's anti-buckling performance, ensuring its structural stability, and extending its service life.

[0044] The shape memory alloy-based cooling and heating devices provided in the first and second aspects of the present application can effectively improve the heat transfer efficiency between the shape memory alloy and the fluid compared to the prior art, thereby ensuring the temperature control efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG1 is a schematic diagram of the three-dimensional structure of a cooling and heating device based on a shape memory alloy provided in one embodiment of the present application;

[0046] FIG2 is a schematic diagram of an exploded structure of a shape memory alloy-based cooling and heating device according to an embodiment of the present application (for ease of illustration, the fixing parts and driving elements are hidden in the figure);

[0047] FIG3 is an exploded view of a pipe segment and a collar used in an embodiment of the present application;

[0048] FIG4 is an exploded view of a pipe joint and a connector used in an embodiment of the present application;

[0049] FIG5 is a side view of a pipe joint used in an embodiment of the present application;

[0050] FIG6 is a side view of a connector used in one embodiment of the present application;

[0051] FIG7 is a schematic cross-sectional view of a flow guide member used in an embodiment of the present application;

[0052] FIG8 is an exploded view of the pipe segment and the cylinder used in one embodiment of the present application;

[0053] FIG9 is a schematic diagram of the three-dimensional structure of a cooling and heating device based on a shape memory alloy provided in another embodiment of the present application;

[0054] FIG10 is a partial enlarged schematic diagram of point A in FIG9 ;

[0055] FIG11 is a schematic diagram of an exploded structure of a shape memory alloy-based cooling and heating device provided in another embodiment of the present application;

[0056] FIG12 is a schematic diagram of the three-dimensional structure of the fixing member used in the embodiments shown in FIG1 and FIG9.

[0057] Explanation of the accompanying drawings: 1. Pipe section; 11. Cavity; 2. Guide member; 21. Through cavity; 3. Fixing member; 31. Connecting rod; 32. Sleeve; 321. Reserved opening; 4. Driving element; 5. Ring; 6. Support seat; 61. First limiting groove; 7. Top cover; 71. Second limiting groove; 72. Reserved hole; 8. Connecting member; 81. Through hole; 9. Cylinder; 91. Flow cavity; 92. Water hole. Modes for Carrying Out the Invention

[0058] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. In this article, the words "upper", "lower", "left", "right" and so on indicating the direction or position relationship are based on the simplified description shown in the accompanying drawings and are not limited to having a specific direction or position relationship. "Multiple" refers to two or more; "several" refers to one or more; "both sides" and "both ends" refer to the two ends of the target structure in the straight line direction.

[0059] Please refer to Figures 1 to 12 for a description of the shape memory alloy-based cooling and heating device provided by this application. The shape memory alloy-based cooling and heating device proposed in this application includes one or more groups of heat transfer components. In the embodiment of this application, only one group of heat transfer components is shown. However, in actual conditions, the heat transfer components can be provided in multiple groups, and each group of heat transfer components operates independently and transfers heat through a fluid. Specifically, when there are multiple groups of heat transfer components, the fluid channels of any two groups of heat transfer components can be optionally connected. It should be noted that the meaning of "optionally" here is that the two groups of heat transfer components can be connected or separated according to the actual operating conditions to achieve the joint use or separate use of the two groups of heat transfer components.

[0060] Referring to Figures 1 to 8 , one embodiment of the present application provides a cooling and heating device based on a shape memory alloy. In this embodiment, the heat transfer component includes one or more tube segments 1; each tube segment 1 is made of a shape memory alloy. When a force is applied axially to the tube segment 1, the tube segment 1 undergoes a phase change, generates heat, and then increases in temperature. When the force is unloaded axially, the tube segment 1 undergoes a reverse phase change, generates cold, and then cools. The fluid transfers heat or cold to achieve heat exchange. The tube segment 1 has a cavity 11 extending axially through it for fluid to pass through.

[0061] It should be noted that, as shown in FIG5 , the cross-section of the cavity 11 is spiral, and the fluid flows from the inside of the spiral structure; accordingly, the internal body of the pipe segment 1 is also spiral; from the cross-section, the pipe segment 1 has a spiral thin wall inside, and this thin wall is in direct contact with the fluid, which is more convenient for the transmission of heat energy.

[0062] When there are multiple pipe segments 1, as shown in Figure 3, the multiple pipe segments 1 are coaxially arranged and connected end to end in sequence. Specifically: for the convenience of description, the axial direction of the pipe segment 1 is defined as a straight line direction, and the multiple pipe segments 1 are arranged along this straight line direction, and the axial direction of each pipe segment 1 is parallel to this straight line direction; and, the two adjacent cavities 11 along this straight line direction are connected to each other, so that the multiple cavities 11 of the multiple pipe segments 1 are connected in sequence to ensure the circulation of the fluid.

[0063] In the embodiment of the present application, the function of the heat transfer component is to generate heat or cold that can be transferred by the fluid. On the one hand, when the force is loaded, the heat is released to heat the fluid, and the fluid transfers the heat to other heat exchange devices for heat exchange, thereby achieving a heating effect on the environment through heat exchange; on the other hand, when the force is unloaded, the heat is absorbed, that is, cold is generated to cool the fluid, and the fluid transfers the cold to other heat exchange devices for heat exchange, thereby achieving a cooling effect on the environment through heat exchange. In this process, since the fluid is in direct contact with the inner wall of the cavity 11 of the pipe segment 1, the heat transfer efficiency of the fluid can be effectively guaranteed. On this basis, since a structure composed of multiple pipe segments 1 can be used, it is also possible to prevent the shape memory alloy from buckling and deformation, thereby improving the anti-buckling performance of the device, ensuring the structural stability of the device, and extending the service life of the device.

[0064] The shape memory alloy-based cooling and heating device provided in the embodiment of the present application can effectively improve the heat transfer efficiency between the shape memory alloy and the fluid compared to the prior art, thereby ensuring the temperature control efficiency of the device.

[0065] It should be noted that when unloading the pipe segment 1, each pipe segment 1 does not necessarily need to be completely released, but only needs to be unloaded to the linear elastic stage of the austenite phase of the shape memory alloy (mainly because the linear elastic stage of the austenite phase does not generate phase change latent heat).

[0066] In some embodiments, as shown in FIG. 3 and FIG. 7 , the heat transfer component further includes a flow guide 2 .

[0067] In this embodiment, there are two flow guide members 2, which are arranged at intervals along a straight line at both ends of a pipe segment 1 or multiple pipe segments 1, and both have a through cavity 21 that passes through the end face of the adjacent pipe segment 1 to the outer peripheral wall of the flow guide member 2; usually, the outer peripheral wall penetrated by the through cavity 21 is the upward wall of the flow guide member 2, so as to facilitate the connection of the fluid inlet pipe and outlet pipe.

[0068] It should be specifically explained that, when there is only one pipe segment 1, the two flow guide members 2 are respectively arranged at both ends of the pipe segment 1, and the two through cavities 21 are respectively connected to the two ends of the cavity 11 of the pipe segment 1; when there are multiple pipe segments 1, as shown in Figure 3, the two flow guide members 2 are respectively arranged at the end of the first pipe segment 1 and the end of the last pipe segment 1 in the multiple pipe segments 1 connected end to end, and the two through cavities 21 are respectively connected to the two cavities 11 of the two pipe segments 1 at the ends.

[0069] In some embodiments, as shown in FIG1 , the heat transfer component further includes a fixing member 3 .

[0070] In this embodiment, there are two fixing members 3, and the two fixing members 3 are arranged at intervals on both sides of the two guide members 2 along the aforementioned straight line direction; one of the fixing members 3 is connected to the guide member 2 located on the same side, and avoids the opening of the through cavity 21 of the guide member 2 on the same side, and the other fixing member 3 is provided with a driving element 4, which is transmission-connected to the guide member 2 located on the same side, and the power output axis of the driving element 4 (i.e., the axial direction of the power output shaft) is parallel to the straight line direction.

[0071] In actual use, the drive element 4 loads or unloads the pipe segments 1, causing them to undergo a phase change or reverse phase change, generating heat or cooling. This heat or cooling is then transferred by the fluid to achieve heat exchange. Specifically, the drive element 4 provides a linear driving force to the flow guide 2, causing the pipe segments 1 to be driven, thereby causing each pipe segment 1 to undergo a phase change, generating heat that can be transferred through the fluid. Alternatively, the drive element 4 unloads this driving force, causing each pipe segment 1 to undergo a reverse phase change, generating cooling that can be transferred through the fluid, ultimately increasing or decreasing the ambient temperature.

[0072] In some embodiments, as shown in Figure 1, the two fixing members 3 are connected by a plurality of connecting rods 31, and the axial direction of each connecting rod 31 is parallel to the aforementioned straight line direction. Of course, in other embodiments, the axial direction of each connecting rod 31 may not be parallel to the aforementioned straight line direction, that is, it may be set at an angle greater than zero and less than 180°; the connecting rod 31 can strengthen the structural strength between the two fixing members 3 and ensure the stability of the structure formed by multiple pipe sections 1.

[0073] In some embodiments, as shown in FIG. 2 and FIG. 3 , the cooling and heating device further includes a plurality of collars 5 ; wherein each collar 5 is sleeved on at least one pipe section 1 to provide support and prevent buckling.

[0074] In this embodiment, the number of collars 5 is equal to the number of pipe segments 1, and the collars 5 are placed one-to-one on the multiple pipe segments 1. Both ends of each pipe segment 1 extend outside the corresponding collar 5, and each collar 5 supports and prevents buckling of the corresponding pipe segment 1. Furthermore, the collars 5 are C-shaped with a notch to facilitate insertion and removal of the pipe segment 1.

[0075] It should be noted that the presence of this collar 5 does not affect the normal use of the pipe segment 1; firstly, this is because there is a gap between the outer wall of the pipe segment 1 and the inner wall of the collar 5; secondly, this is because the deformation of the pipe segment 1 is small; and thirdly, this is because the collar 5 is made of elastic material.

[0076] In some embodiments, as shown in FIG. 2 , the heat transfer component further includes a support base 6 and a top cover 7 .

[0077] The support base 6 is used to be fixed on a plane, and has a first limiting groove 61 on its upper side. The first limiting groove 61 passes through both ends of the support base 6 along the aforementioned straight line direction.

[0078] The top cover 7 is connected to the upper side of the support base 6. Its lower side has a second retaining groove 71 adapted to communicate with the first retaining groove 61. The second retaining groove 71 extends along the aforementioned straight line through both ends of the top cover 7. The space formed by the first and second retaining grooves 61 is used to secure the pipe joint 1 and the collar 5. In this embodiment, a reserved hole 72 is formed on the upper side of the top cover 7, which communicates with the second retaining groove 71. This reserved hole 72 facilitates the input of fluid into the pipe joint 1 to dissipate heat.

[0079] By adopting the above technical solution, the aforementioned pipe section 1 and the collar 5 are both arranged between the top cover 7 and the support seat 6, and the outer peripheral wall of the collar 5 is suitable for simultaneously abutting against the inner wall of the first limiting groove 61 and the inner wall of the second limiting groove 71 to improve the structural stability of the device.

[0080] In some embodiments, as shown in Figures 3, 4, and 6, the heat transfer component further includes a connector 8. When there are multiple pipe segments 1, two adjacent pipe segments 1 along the aforementioned straight line are butted together via the connector 8. The connector 8 has a plurality of through holes 81 extending along the aforementioned straight line, and each through hole 81 communicates with two cavities 11 of two adjacent pipe segments 1, thereby achieving butt connection between adjacent pipe segments 1 and communication between adjacent cavities 11, thereby improving the stability of temperature regulation via the shape memory alloy.

[0081] It should be noted that the connector 8 can also seal the pipe segments 1 on both sides to avoid leakage when the pipe segments 1 are loaded. The specific sealing method can be to set an annular protrusion on the side of the connector 8 for the pipe segment 1 to be inserted or a groove for the pipe segment 1 to be embedded, which is not limited here.

[0082] In some embodiments, the thermal conductivity of the connector 8 is lower than that of the pipe segment 1 ; therefore, when heat is generated on the pipe segment 1 , the heat is preferentially output through the fluid in the pipe segment 1 , thereby avoiding heat loss caused by the connector 8 .

[0083] In some embodiments, the strength limit of the connector 8 is higher than the strength limit of the pipe segment 1; specifically, when the pipe segment 1 is loaded by applying pressure, this strength limit may specifically refer to compressive strength; when the pipe segment 1 is loaded by applying tension, this strength limit may specifically refer to tensile strength.

[0084] In some embodiments, the elastic modulus of connector 8 is higher than that of pipe segment 1. By comprehensively considering the ultimate strength and elastic modulus to select connector 8, the following technical objectives can be achieved: when pipe segment 1 is loaded in a linear direction, elastic deformation of connector 8 can be avoided by adjusting the loading force.

[0085] In some embodiments, as shown in Figures 8 and 11 , the heat transfer component further includes a hollow cylindrical body 9, with both ends of the cylindrical body 9 facing the aforementioned straight line having openings suitable for passage of the flow guide 2. When the heat transfer component includes the cylindrical body 9, the support base 6, and the top cover 7, the cylindrical body 9 is positioned between the support base 6 and the top cover 7. When the heat transfer component further includes the collar 5, the outer circumferential wall of the collar 5 is in contact with the inner circumferential wall of the cylindrical body 9.

[0086] The cylinder 9 is coaxially sleeved on the outer circumference of the pipe segment 1 so that a flow cavity 91 for fluid to pass through is formed between the inner circumferential wall of the cylinder 9 and the outer circumferential wall of the pipe segment 1; by adding and withdrawing fluid into the flow cavity 91, heat energy can be transferred from the outside of the pipe segment 1 to the surface of the pipe segment 1, thereby achieving control of the ambient temperature.

[0087] It should be specifically explained that when there is only one tube segment 1, the flow cavity 91 is optionally connected to the cavity 11; when there are multiple tube segments 1, the flow cavity 91 is optionally connected to one or more cavities 11; that is, the flow cavity 91 and the cavity 11 can work independently or cooperate with each other; it should be pointed out in particular that when the flow cavity 91 works independently, no fluid may pass through the inside of the cavity 11.

[0088] In some embodiments, the thermal conductivity of the cylinder 9 is lower than that of the pipe segment 1 ; that is, the heat transfer between the inside and outside of the cylinder 9 is slower than the heat transfer between the pipe segment 1 and the flow cavity.

[0089] In this embodiment, the cylinder 9 is made of thermal insulation material, that is, the internal heat of the cylinder 9 will be mainly transferred to the fluid; and in the preparation process, the material can be comprehensively selected based on actual conditions such as procurement cost.

[0090] Based on the same inventive concept, referring to Figures 3 to 8 and Figures 9 to 12, another embodiment of the present application further provides a cooling and heating device based on a shape memory alloy. In this embodiment, the heat transfer component includes a hollow cylinder 9 and one or more pipe segments 1 disposed within the cylinder 9; each pipe segment 1 is made of a shape memory alloy; and when there are multiple pipe segments 1, the multiple pipe segments 1 are coaxially arranged and sequentially connected end to end. Specifically: For ease of description, the axial direction of the pipe segment 1 is defined as a linear direction, that is, the multiple pipe segments 1 are arranged along this linear direction, and the axial direction of each pipe segment 1 is parallel to this linear direction; and two adjacent pipe segments 1 along this linear direction are connected, so that when a force is applied axially to the pipe segment 1 (by an external driving component), the pipe segment 1 undergoes a phase change and generates heat, then increases in temperature. When the force is unloaded axially along the pipe segment 1, the pipe segment 1 undergoes a reverse phase change and generates cold, then cools down. The fluid transfers heat or cold to achieve heat exchange. In this embodiment, the direction of this straight line is parallel to the axial direction of the cylinder 9; it should be noted that when unloading the pipe segment 1, each pipe segment 1 does not necessarily need to be completely released, but only needs to be unloaded to the linear elastic stage of the austenite phase of the shape memory alloy (mainly because the linear elastic stage of the austenite phase does not generate phase change latent heat).

[0091] Among them, a flow cavity 91 for fluid to pass through is formed between the inner wall of the cylinder 9 and the pipe section 1, and the cylinder 9 has several water holes 92 for fluid to pass through. Specifically: when the number of water holes 92 is one, this water hole 92 is connected to the inlet pipe and the outlet pipe of the fluid at the same time to realize the input and output of the fluid; when the number of water holes 92 is multiple, one or more water holes 92 are used to communicate with the inlet pipe of the fluid, and the other one or more water holes 92 are used to communicate with the outlet pipe of the fluid to realize the input and output of the fluid.

[0092] In the preferred embodiment, there are two water holes 92 , and the two water holes 92 are arranged side by side along the axial direction of the cylinder 9 .

[0093] In actual use, by adding and drawing fluid into the flow cavity 91, the fluid can be transported from the outside of the pipe segment 1, thereby completing the heat energy transfer between the fluid and the surface of the pipe segment 1, and ultimately achieving the control of the ambient temperature.

[0094] In the embodiment of the present application, the function of the heat transfer component is to generate heat or cold that can be transferred by the fluid. On the one hand, when the force is loaded, the heat is released to increase the temperature of the fluid. The fluid then transfers the heat to other heat exchange devices for heat exchange, thereby achieving a heating effect on the environment through heat exchange. On the other hand, when the force is unloaded, the heat is absorbed, that is, cold is generated to cool the fluid. The fluid then transfers the cold to other heat exchange devices for heat exchange, thereby achieving a cooling effect on the environment through heat exchange. In this process, since the fluid is in direct contact with the outer wall of the pipe segment 1, the heat transfer efficiency of the fluid can be effectively guaranteed. On this basis, since a structure composed of multiple pipe segments 1 can be used, it is also possible to prevent the shape memory alloy from buckling and deformation, thereby improving the anti-buckling performance of the device, ensuring the structural stability of the device, and extending the service life of the device.

[0095] The shape memory alloy-based cooling and heating device provided in the embodiment of the present application can effectively improve the heat transfer efficiency between the shape memory alloy and the fluid compared to the prior art, thereby ensuring the temperature control efficiency of the device.

[0096] In some embodiments, the thermal conductivity of the cylinder 9 is lower than that of the pipe segment 1 ; that is, compared with the heat transfer between the pipe segment 1 and the flow cavity 91 , the heat transfer between the inside and outside of the cylinder 9 is slower.

[0097] In this embodiment, the cylinder 9 is made of thermal insulation material, that is, the internal heat of the cylinder 9 will be mainly transferred to the fluid; and in the preparation process, the material can be comprehensively selected based on actual conditions such as procurement cost.

[0098] In some embodiments, as shown in FIG. 9 to FIG. 11 , the heat transfer component further includes a fixing member 3 .

[0099] In this embodiment, there are two fixing members 3 , which are spaced apart on both sides of the cylinder 9 along the axial direction of the cylinder 9 , and the two fixing members 3 are respectively connected to the two ends of the cylinder 9 to fix the cylinder 9 .

[0100] In this embodiment, a drive element 4 is provided on one of the fixing members 3. The power output shaft of this drive element 4 passes through the corresponding fixing member 3 and is in driving connection with the end of the pipe segment 1 located on the same side. The power output shaft direction (i.e., the axial direction of the power output shaft) is parallel to the aforementioned linear direction. The drive element 4 loads or unloads the pipe segment 1, causing the pipe segment 1 to undergo a phase change or reverse phase change to generate heat or cold, and the heat or cold is then transferred by the fluid to achieve heat exchange. Specifically, while ensuring the sealing of the aforementioned flow cavity 91, this drive element 4 provides a linear driving force to the pipe segment 1, thereby causing each pipe segment 1 to undergo a phase change, thereby generating heat that can be output through the fluid. Alternatively, the drive element 4 unloads this driving force, causing each pipe segment 1 to undergo a reverse phase change, thereby generating cold that can be output through the fluid, ultimately achieving the effect of increasing or decreasing the ambient temperature.

[0101] In some embodiments, as shown in Figures 11 and 12 , adjacent sides of two fixing members 3 are fixedly connected to sleeves 32 , with the axial direction of the sleeves 32 parallel to the linear direction. The sleeves 32 are used to insert the ends of the pipe segments 1 on the same side. The sleeves 32 have reserved openings 321 for fluid passage. The reserved openings 321 communicate with the flow chamber 91 and are used to extract the fluid absorbing heat or cooling for heat exchange, or to introduce the fluid into the flow chamber 91 to absorb heat or cooling. Furthermore, the power output shaft of the drive element 4 is inserted into the sleeves 32 on the same side and extends outward to load or unload the pipe segments 1 inserted into the sleeves 32 .

[0102] In some embodiments, as shown in Figures 9 and 11, the two fixing members 3 are connected by a plurality of connecting rods 31, and the axial direction of each connecting rod 31 is parallel to the aforementioned straight line direction. Of course, in other embodiments, the axial direction of each connecting rod 31 may not be parallel to the aforementioned straight line direction, that is, it may be set at an angle greater than zero and less than 180°; the connecting rod 31 can strengthen the structural strength between the two fixing members 3 to ensure the stability of the cylinder 9 in a fixed state.

[0103] In some embodiments, as shown in Figures 3 and 11, the cooling and heating device also includes a plurality of collars 5; a collar 5 is sleeved on each pipe segment 1; the outer peripheral wall of the collar 5 is connected to the inner peripheral wall of the cylinder 9, and both ends of the pipe segment 1 extend outward from the corresponding collar 5, wherein each collar 5 can support and prevent buckling of the corresponding pipe segment 1.

[0104] It should be noted that the structure of the collar 5 is compatible with the structure of the pipe segment 1 ; in this embodiment, the collar 5 adopts a C-shaped structure with a notch to facilitate the insertion and removal of the pipe segment 1 .

[0105] It should be noted that the presence of this collar 5 does not affect the normal use of the pipe segment 1; firstly, this is because there is a gap between the outer wall of the pipe segment 1 and the inner wall of the collar 5; secondly, this is because the deformation of the pipe segment 1 is small; and thirdly, this is because the collar 5 is made of elastic material.

[0106] In some embodiments, as shown in FIG3 to FIG5 , the pipe segment 1 has a cavity 11 that runs through the pipe segment 1 along its axial direction for allowing fluid to pass through. When there are multiple pipe segments 1 , two adjacent cavities 11 along a straight line are connected.

[0107] It should be noted that, when there is only one pipe segment 1 , the flow cavity 91 may be optionally connected to the lumen 11 ; when there are multiple pipe segments 1 , the flow cavity 91 may be optionally connected to one or more lumen 11 .

[0108] It should be noted that, as shown in FIG5 , the cross-section of the cavity 11 is spiral, and the fluid flows from the inside of the spiral structure; accordingly, the internal body of the pipe segment 1 is also spiral; from the cross-section, the pipe segment 1 has a spiral thin wall inside, and this thin wall is in direct contact with the fluid, which is more convenient for the transmission of heat energy.

[0109] In some embodiments, as shown in FIG. 3 and FIG. 7 , the heat transfer component further includes a flow guide 2 .

[0110] In this embodiment, there are two flow guides 2, spaced linearly at opposite ends of one or more pipe segments 1. Each flow guide 2 has a through cavity 21 extending from the end face of the adjacent pipe segment 1 to the outer wall of the flow guide 2. The through cavity 21 communicates with the flow chamber 91. Typically, the outer wall penetrated by the through cavity 21 is the upward-facing wall of the flow guide 2, facilitating connection to the fluid inlet and outlet pipes. In this case, the driving element 4 can load or unload fluid through the flow guide 2, thereby loading or unloading fluid into the pipe segment 1.

[0111] It should be specifically explained that, when there is only one pipe segment 1, two flow guide members 2 are respectively arranged at both ends of the pipe segment 1, and two through cavities 21 are respectively connected to the two ends of the cavity 11 of the pipe segment 1; when there are multiple pipe segments 1, as shown in Figure 3, two flow guide members 2 are respectively arranged at the end of the first pipe segment 1 and the end of the last pipe segment 1 in the multiple pipe segments 1 connected end to end, and the two through cavities 21 are respectively connected to the two cavities 11 of the two pipe segments 1 at the ends; and, when there is only one pipe segment 1, the flow cavity 91 is optionally connected to the cavity 11; when there are multiple pipe segments 1, the flow cavity 91 is optionally connected to one or more of the cavities 11; that is, this flow cavity 91 and the cavity 11 can work independently of each other, or they can cooperate with each other; it should be pointed out in particular that when the flow cavity 91 works independently, there may be no fluid passing through the inside of the cavity 11.

[0112] In some embodiments, as shown in Figures 3, 4, and 6, the heat transfer component further includes a connector 8. When there are multiple pipe segments 1, two adjacent pipe segments 1 along the aforementioned straight line are butted together via the connector 8. The connector 8 has a plurality of through holes 81 extending along the aforementioned straight line, and each through hole 81 is connected to two adjacent cavities 11, thereby achieving the butt connection between adjacent pipe segments 1 and the connection between adjacent cavities 11, thereby improving the stability of temperature regulation via the shape memory alloy.

[0113] It should be noted that the connector 8 can also seal the pipe segments 1 on both sides to avoid leakage when the pipe segments 1 are loaded. The specific sealing method can be to set an annular protrusion on the side of the connector 8 for the pipe segment 1 to be inserted or a groove for the pipe segment 1 to be embedded, which is not limited here.

[0114] In some embodiments, the thermal conductivity of the connector 8 is lower than that of the pipe segment 1 ; therefore, when heat is generated on the pipe segment 1 , the heat is preferentially output through the fluid in the pipe segment 1 , thereby avoiding heat loss caused by the connector 8 .

[0115] In some embodiments, the strength limit of the connector 8 is higher than the strength limit of the pipe segment 1; specifically, when the pipe segment 1 is loaded by applying pressure, this strength limit may specifically refer to compressive strength; when the pipe segment 1 is loaded by applying tension, this strength limit may specifically refer to tensile strength.

[0116] In some embodiments, the elastic modulus of connector 8 is higher than that of pipe segment 1. By comprehensively considering the ultimate strength and elastic modulus to select connector 8, the following technical objectives can be achieved: when pipe segment 1 is loaded in a linear direction, elastic deformation of connector 8 can be avoided by adjusting the loading force.

[0117] The two cooling and heating devices based on shape memory alloys mentioned in the embodiments of the present application have the same inventive concepts. One of the cooling and heating devices is described as follows: the heat transfer component includes a tube segment 1, and the tube segment 1 has a cavity 11, and the heat transfer component also includes a cylinder 9, and a flow cavity 91 is formed between the cylinder 9 and the tube segment 1. The other cooling and heating device is described as follows: the heat transfer component includes a tube segment 1 and a cylinder 9, and a flow cavity 91 is formed between the cylinder 9 and the tube segment 1, and the tube segment 1 has a cavity. The inventive concepts of both devices are to increase the heat exchange efficiency by forming a cavity structure between the tube segment 1 and the fluid.

[0118] The above content is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A cooling and heating device based on a shape memory alloy, characterized in that: The heat transfer component includes a pipe segment made of a shape memory alloy material. The pipe segment has a cavity that runs through the pipe segment along its own axis and is used for fluid to pass through. When the pipe segment is loaded or unloaded to generate heat or cold, the fluid flows in the cavity to transfer heat or cold.

2. The cooling and heating device based on shape memory alloy according to claim 1, characterized in that: The heat transfer components are provided in one or more groups. When there are multiple groups of heat transfer components, the fluid channels of any two groups of the heat transfer components can be optionally connected.

3. The cooling and heating device based on shape memory alloy according to claim 1 or 2, characterized in that: There are one or more pipe segments. When there are multiple pipe segments, the multiple pipe segments are arranged along a straight line, and the axial direction of each pipe segment is parallel to the straight line direction; and two adjacent cavities along the straight line direction are connected.

4. The cooling and heating device based on shape memory alloy according to any one of claims 1 to 3, characterized in that: The heat transfer member further comprises: Two flow guides are arranged at intervals along the straight line at both ends of one or more pipe segments, and each has a through cavity extending from the end surface of the adjacent pipe segment to the outer peripheral wall of the flow guide; Wherein, when there is only one pipe segment, the two through cavities are respectively communicated with the two ends of the cavity; when there are multiple pipe segments, the two through cavities are respectively communicated with the two cavities at the ends.

5. The cooling and heating device based on shape memory alloy according to claim 4, characterized in that: The heat transfer member further comprises: Two fixing parts are arranged at intervals on both sides of the two guide parts along the straight line direction; one of the fixing parts is connected to the guide part located on the same side, and a driving element is provided on the other fixing part, and the driving element is transmission-connected to the guide part located on the same side, and the axial direction of the power output shaft of the driving element is parallel to the straight line direction.

6. The cooling and heating device based on shape memory alloy according to claim 5, characterized in that: The two fixing members are connected via a plurality of connecting rods.

7. The cooling and heating device based on shape memory alloy according to claim 6, characterized in that: The axial direction of each connecting rod is parallel to the straight line direction.

8. The cooling and heating device based on shape memory alloy according to any one of claims 1 to 3, characterized in that: The cooling and heating device further comprises: a plurality of sleeve rings, all sleeved on the pipe joint.

9. The cooling and heating device based on shape memory alloy according to claim 8, characterized in that: The heat transfer member further comprises: A support base, used to be fixed on a plane, with a first limiting groove on its upper side, and the first limiting groove passes through both ends of the support base along the straight line direction; Wherein, the pipe joint and the collar are both arranged in the first limiting groove, and the outer peripheral wall of the collar abuts against the inner wall of the first limiting groove.

10. The cooling and heating device based on shape memory alloy according to any one of claims 1 to 3, characterized in that: When there are multiple pipe segments, two adjacent pipe segments along the straight line are butted together via a connector; The connecting piece is provided with a plurality of through holes which are all passed through along the straight line direction, and each of the through holes is communicated with the cavities of two adjacent pipe sections.

11. The cooling and heating device based on shape memory alloy according to claim 10, characterized in that: The thermal conductivity of the connecting piece is smaller than the thermal conductivity of the pipe segment.

12. The cooling and heating device based on shape memory alloy according to claim 10, characterized in that: The strength limit of the connecting piece is higher than the strength limit of the pipe segment.

13. The cooling and heating device based on shape memory alloy according to claim 10, characterized in that: The elastic modulus of the connecting member is higher than the elastic modulus of the pipe segment.

14. The cooling and heating device based on shape memory alloy according to any one of claims 1 to 13, characterized in that: The heat transfer member further comprises: a cylinder coaxially sleeved on the outer periphery of the pipe section so that a flow cavity for fluid to pass through is formed between the inner peripheral wall of the cylinder and the outer peripheral wall of the pipe section; Wherein, when there is only one pipe segment, the flow cavity is optionally communicated with the cavity; when there are multiple pipe segments, the flow cavity is optionally communicated with one or more of the cavities.

15. The cooling and heating device based on shape memory alloy according to claim 14, characterized in that: The thermal conductivity of the cylinder is smaller than the thermal conductivity of the pipe segment.

16. A cooling and heating device based on shape memory alloy, characterized in that: The heat transfer component includes a cylinder and a pipe segment made of shape memory alloy; The cylinder is sleeved on the outer circumference of the pipe section, and a flow cavity for fluid to pass through is formed between the inner circumferential wall of the cylinder and the outer circumferential wall of the pipe section; when the pipe section is loaded or unloaded to generate heat or cold, the fluid flows through the flow cavity to transfer heat or cold.

17. The cooling and heating device based on shape memory alloy according to claim 16, characterized in that: The cylinder has a plurality of water holes which are communicated with the flow cavity and are used for allowing fluid to pass through.

18. The cooling and heating device based on shape memory alloy according to claim 16 or 17, characterized in that: The heat transfer components are provided in one or more groups. When there are multiple groups of heat transfer components, the fluid channels of any two groups of the heat transfer components can be optionally connected.

19. The cooling and heating device based on shape memory alloy according to any one of claims 16 to 18, characterized in that: There are one or more pipe segments. When there are multiple pipe segments, the multiple pipe segments are arranged along a straight line, and two adjacent pipe segments along the straight line are connected.

20. The cooling and heating device based on shape memory alloy according to any one of claims 16 to 19, characterized in that: The thermal conductivity of the cylinder is smaller than the thermal conductivity of the pipe segment.

21. The cooling and heating device based on shape memory alloy according to any one of claims 16 to 19, characterized in that: The heat transfer member further comprises: Two fixing parts are arranged on both sides of the cylinder at intervals along the axial direction of the cylinder, and the two fixing parts are respectively connected to the two ends of the cylinder; a driving element is provided on one of the fixing parts, and the driving element is transmission-connected to the end of the pipe section located on the same side, and the axial direction of the power output shaft of the driving element is parallel to the straight line direction.

22. The cooling and heating device based on shape memory alloy according to claim 21, characterized in that: The adjacent side surfaces of the two fixing members are fixedly connected with sleeves, the axial direction of the sleeves is parallel to the straight line direction, and the sleeves are used for inserting the ends of the pipe sections on the same side; the sleeves have reserved openings for fluid passage, and the power output shaft of the driving element is inserted into the sleeves on the same side and extends out to load or unload the pipe sections inserted into the sleeves.

23. The cooling and heating device based on shape memory alloy according to claim 21, characterized in that: The two fixing members are connected via a plurality of connecting rods.

24. The cooling and heating device based on shape memory alloy according to claim 23, characterized in that: The axial direction of each connecting rod is parallel to the straight line direction.

25. The cooling and heating device based on shape memory alloy according to any one of claims 16 to 19, characterized in that: The cooling and heating device further comprises: a plurality of sleeve rings, all sleeved on the pipe joint.

26. The cooling and heating device based on shape memory alloy according to any one of claims 16 to 25, characterized in that: The pipe segment has a cavity running through it along its axial direction for allowing fluid to pass through; when there are multiple pipe segments, two adjacent cavities along the straight line are connected; Wherein, when there is only one pipe segment, the flow cavity is optionally communicated with the cavity; when there are multiple pipe segments, the flow cavity is optionally communicated with one or more of the cavities.

27. The cooling and heating device based on shape memory alloy according to claim 26, characterized in that: The heat transfer member further comprises: Two flow guides are arranged at intervals at both ends of the pipe section along the straight line direction, and each has a through cavity extending from the end surface of the adjacent pipe section to the outer peripheral wall of the flow guide and communicating with the flow cavity; Wherein, when there is only one pipe segment, the two through cavities are respectively communicated with the two ends of the cavity; when there are multiple pipe segments, the two through cavities are respectively communicated with the two cavities at the ends.

28. The cooling and heating device based on shape memory alloy according to claim 26, characterized in that: When there are multiple pipe segments, two adjacent pipe segments along the straight line are butted together via a connector; The connecting piece is provided with a plurality of through holes which are all passed through along the straight line direction, and each of the through holes is communicated with the cavities of two adjacent pipe sections.

29. The cooling and heating device based on shape memory alloy according to claim 28, characterized in that: The thermal conductivity of the connecting piece is smaller than the thermal conductivity of the pipe segment.

30. The cooling and heating device based on shape memory alloy according to claim 28, characterized in that: The strength limit of the connecting piece is higher than the strength limit of the pipe segment.

31. The cooling and heating device based on shape memory alloy according to claim 28, characterized in that: The elastic modulus of the connecting member is higher than the elastic modulus of the pipe segment.

Images