Elastic heat regenerator and assembling method thereof

Abstract

An elastic heat regenerator and an assembling method thereof belong to the technical field of environment-friendly refrigeration, the elastic heat regenerator comprises a piston pressure plate, a cylinder body, a guide rod and a pressure-bearing chassis, the cylinder body is arranged between the piston pressure plate and the pressure-bearing chassis, a fluid enclosure structure exchanging heat with an elastic heat material is formed through the cylinder body, and the elastic heat material is arranged in the cylinder body; the piston pressure plate and the pressure-bearing chassis provide axial compression force for the elastic heat material in the cylinder body; and one end of the guide rod is fixed on the pressure-bearing chassis, and a single-degree-of-freedom kinematic pair is formed between the other end of the guide rod and the piston pressure plate, so that the motion direction of the piston pressure plate is limited to the direction of axially compressing the elastic heat material. A guide rod is lengthened, and a multi-stage cascade heat regenerator can be formed by combining an uppermost-stage elastic heat regenerator, a plurality of middle-stage elastic heat regenerators and a lowermost-stage elastic heat regenerator in an associated mode. The design difficulty of a high-performance elastic heat regenerator is broken through, the axial stress and flow heat exchange efficiency of the elastic heat material are ensured, and the elastic heat regenerator has the characteristics of high precision, long service life and high performance.

Description

Technical Field

[0001] The invention belongs to the technical field of environmentally friendly refrigeration, and in particular relates to a spring heat regenerator and an assembly method thereof. Background Art

[0002] At present, the industry has been committed to finding a new green refrigeration technology with 0 GWP and recyclability to replace traditional gas compression refrigeration. Elastic caloric refrigeration refers to a refrigeration technology that produces a refrigeration effect by causing a solid-solid phase change of elastomeric materials driven by a stress field. It is environmentally friendly, energy-saving and efficient, and perfectly meets the needs of new refrigeration technologies. It is considered to be the most promising solid-state refrigeration technology. The core component of elastomeric refrigeration is the elastomeric heat regenerator, in which the shape of the elastomeric material inside always extends as far as possible in the flow direction. In the coupling process of solid-solid phase change and flow, a huge temperature difference is generated in the flow direction of the elastomeric material, thereby obtaining a refrigeration temperature difference far exceeding that the elastomeric material itself can provide.

[0003] To design a high-performance elastomeric regenerator, it is necessary to ensure the axial stress of the elastomeric material and the high efficiency of flow heat transfer. When the elastomeric material is subjected to stress, its thermal effect and mechanical properties will change. In order to ensure that the material maintains a stable thermal effect output during repeated stress, the structural design of the regenerator needs to be optimized to ensure that the material can be evenly distributed when subjected to axial stress to avoid stress concentration and fatigue damage. The fluid in the regenerator needs to exchange heat efficiently with the elastomeric material. To achieve this goal, it is necessary to optimize the design of the fluid channel, increase the flow rate and turbulence of the fluid, and enhance the heat exchange efficiency. In order to realize the commercial application of elastomeric refrigeration technology, it is also necessary to ensure that the regenerator is mass-producible. This requires that the feasibility and cost control of the production process be fully considered during the design process, and structures and materials that are easy to process and assemble are used. High precision is the key to ensuring the stable performance of the regenerator. During the design process, the size and shape accuracy of each component need to be strictly controlled to ensure that the assembled regenerator can meet the design requirements. Long life requires that the regenerator can maintain good performance and stability during long-term use, which requires improving the durability and fatigue resistance of the regenerator through reasonable material selection and structural design. Summary of the invention

[0004] The purpose of the present invention is to provide a resilient heat exchanger and an assembly method thereof in order to address the above-mentioned problems in the prior art, thereby improving the accuracy, lifespan and overall performance of the resilient heat exchanger under the existing processing technology and facilitating mass production.

[0005] In order to achieve the above object, the present invention has the following technical solutions: In a first aspect, a heat regenerator is provided, comprising a piston pressure plate, a cylinder body, a guide rod and a pressure chassis, wherein the cylinder body is arranged between the piston pressure plate and the pressure chassis, and a fluid enclosure structure for heat exchange with a heat regenerating material is formed through the cylinder body, and the heat regenerating material is arranged inside the cylinder body; the piston pressure plate and the pressure chassis provide axial compression force for the heat regenerating material inside the cylinder body; one end of the guide rod is fixed to the pressure chassis, and a single-degree-of-freedom kinematic pair is formed between the other end of the guide rod and the piston pressure plate, thereby limiting the movement direction of the piston pressure plate to the direction of axial compression of the heat regenerating material.

[0006] As a preferred solution, the piston pressure plate can move reciprocatingly axially along the guide rod, and the piston pressure plate realizes dynamic sealing with the cylinder body through the radial sealing groove and sealing material provided on the cylinder body; the cylinder body and the pressure base plate are tightly assembled, and static sealing is achieved through the axial sealing groove and sealing material provided on the pressure base plate.

[0007] As a preferred solution, the cylinder body is made of hard polymer material, and the hard polymer material has a tensile strength of more than 40 MPa; the processed material of the piston pressure plate and the pressure chassis has a tensile strength of more than 1 GPa and a hardness of more than HRC 40.

[0008] As a preferred solution, a plurality of elastic thermo material positioning holes are provided on the surfaces of the piston pressure plate and the cylinder body, and the elastic thermo material is positioned and installed on the elastic thermo material positioning holes.

[0009] As a preferred solution, two areas are provided on the cylinder body and the piston pressure plate, namely, an effective compression area and a radial sealing area; the shapes of the effective compression area of ​​the piston pressure plate and the effective compression area of ​​the cylinder body are set according to the form of the elastic thermo-material, and a flow heat exchange area is formed between the effective compression area and the elastic thermo-material; the radial sealing area of ​​the piston pressure plate and the radial sealing area of ​​the cylinder body are used to realize dynamic sealing during the operation of the regenerator, the outer contour of the effective compression area is included in the outer contour of the radial sealing area, and there is a gap between the effective compression area and radial sealing area of ​​the piston pressure plate and the effective compression area and radial sealing area of ​​the cylinder body, and the width of the gap in the normal direction of the radial sealing area boundary is a constant value.

[0010] As a preferred solution, the radial sealing area of ​​the piston pressure plate and the radial sealing area of ​​the cylinder body are selected to be rounded rectangles or circles; a rounded transition is used between the effective compression area and the radial sealing area of ​​the piston pressure plate.

[0011] As a preferred solution, a fluid interface for connecting to an external fluid network is provided on the side of the cylinder body.

[0012] As a preferred solution, the guide rod is lengthened, and a multi-stage cascade regenerator is formed by connecting and combining a top-level elastic heat regenerator, several middle-level elastic heat regenerators and a bottom-level elastic heat regenerator. The middle-level elastic heat regenerator adopts a pressure-piston platen to replace the pressure base plate and the piston platen. The top-level elastic heat regenerator completes the use of multi-stage elastic heat materials through the piston platen under the same driving force.

[0013] As a preferred solution, in a multi-stage cascade regenerator, there are two ways to connect the elastic regenerators at different stages: In series connection, the inlet and outlet of the elastic heat regenerators of adjacent stages are connected to enhance the active heat recovery performance of the elastic heat regenerator and improve the temperature span of the elastic heat regenerator; In parallel, the inlet of the elastic heat regenerator is connected to the inlet of other elastic heat regenerators, and different elastic heat regenerators are operated under the same conditions to improve the cooling capacity of the elastic heat regenerator.

[0014] In a second aspect, a method for assembling the elastic heat regenerator is provided, comprising: Installation positioning holes are opened on the piston pressure plate, the cylinder body and the pressure-bearing chassis to position the piston pressure plate, the cylinder body and the pressure-bearing chassis in the axial compression direction of the elastic and thermal materials; The sealing material is buried in the radial sealing groove in the cylinder body, and the positioning cylindrical pin is inserted into the installation positioning hole of the cylinder body, and the piston pressure plate is embedded in the cylinder body through the installation positioning hole of the piston pressure plate, and then the initial shape of the elastic thermal material is adjusted through the elastic thermal material positioning hole; After ensuring that the elastic-thermal material is only subjected to axial force and no dislocation occurs when being compressed in the initial form, the guide rod and the sealing material are installed in the axial sealing groove of the pressure chassis, and the guide rod is embedded in the piston pressure plate through the installation positioning hole on the pressure chassis, so that the pressure chassis is in contact with the elastic-thermal material, and the sealing material is in contact with the cylinder body; the cylinder body and the pressure chassis are locked through the connecting through holes on the cylinder body and the pressure chassis, and the positioning cylindrical pin is pulled out to complete the assembly.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The elastic heat regenerator designed by the present invention has a simple structure, and is composed of a piston platen, a cylinder body, a guide rod, and a pressure bottom plate. The cylinder body is arranged between the piston platen and the pressure bottom plate, wherein the piston platen is a moving part, and the cylinder body and the pressure bottom plate are fixed parts. The piston platen and the pressure bottom plate provide axial compression force for the elastic heat material. The piston platen has no direct contact with the cylinder body. The movement direction of the piston platen is limited to the axial direction by the guide rod, and a fluid enclosure structure for heat exchange between the refrigerant and the elastic heat material is formed by the cylinder body. The elastic heat regenerator proposed by the present invention is easy to realize mass production, breaks through the design difficulties of high-performance elastic heat regenerators, ensures the axial force of the elastic heat material and the high efficiency of flow heat exchange, and has the characteristics of high precision, high life, and high performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the technical solution of this application. The illustrative embodiments of this application and their descriptions are only used to explain this application and do not constitute an improper limitation on the protection scope of this application.

[0017] Figure 1 This is a schematic diagram of the assembly structure of the elastic heat regenerator according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of a piston pressure plate in a spring-heat regenerator according to an embodiment of the present invention; FIG3 (a) is a schematic diagram of the three-dimensional structure of a cylinder in a regenerative heat exchanger according to an embodiment of the present invention; FIG3( b ) is a schematic diagram of a top view of a cylinder in a regenerative heat exchanger according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a pressure-bearing bottom plate in a regenerative heat exchanger according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the assembly of a multi-stage cascade regenerator according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] It should be noted that in the description of the embodiments of the present invention, the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0020] Meanwhile, in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1 The embodiment of the present invention provides an elastic heat regenerator, including a piston platen 101, a cylinder body 102, a guide rod 103 and a pressure bottom plate 104. The cylinder body 102 is arranged between the piston platen 101 and the pressure bottom plate 104. A fluid enclosure structure for heat exchange with an elastic heat material is formed by the cylinder body 102, and a heat exchange area between the fluid and the elastic heat material is established. The elastic heat material is arranged inside the cylinder body 102; the piston platen 101 and the pressure bottom plate 104 provide axial compression force for the elastic heat material inside the cylinder body 102; one end of the guide rod 103 is fixed on the pressure bottom plate 104, and a single-degree-of-freedom kinematic pair is formed between the other end of the guide rod 103 and the piston platen 101, so that the movement direction of the piston platen 101 is limited to the direction of axial compression of the elastic heat material.

[0022] In this embodiment, the elastic heat material used is a tubular binary nickel-titanium alloy with a total mass of about 8g. Therefore, the elastic heat regenerator is required to ensure that the NiTi tube bundle does not misalign during operation, and to ensure that there is no air leakage when the cylinder is under negative pressure and no liquid leakage when the cylinder is under positive pressure.

[0023] In a possible implementation, the piston platen 101 is a moving part, while the cylinder body 102 and the pressure bottom plate 104 are fixed parts. During the operation of the regenerator, the piston platen 101 can move back and forth axially along the guide rod 103, and has no direct contact with the cylinder body 102 throughout the entire process. The piston platen 101 realizes dynamic sealing with the cylinder body 102 through the radial sealing groove 102-1 and the sealing material (sealing ring or packing) provided on the cylinder body 102; the cylinder body 102 and the pressure bottom plate 104 are fastened by screws through the reserved connection through holes, and static sealing is achieved through the axial sealing groove 104-1 and the sealing material provided on the pressure bottom plate 104.

[0024] As shown in FIG3 (a) and FIG3 (b), the cylinder body 102 is not subjected to axial force during the operation of the regenerator, but only to the pressure of the internal fluid. The cylinder body 102 is made of hard polymer materials, which have a tensile strength of more than 40 MPa, such as PMMA, PPS and other materials, and generally have good transparency, which is convenient for later observation and research.

[0025] The piston pressure plate 101 and the pressure bottom plate 104 bear the reaction force of the working pressure of the elastic and thermal material. The processed materials of the piston pressure plate 101 and the pressure bottom plate 104 have a tensile strength of more than 1 GPa and a hardness of more than HRC 40.

[0026] In this embodiment, the piston pressure plate 101 and the pressure base plate 104 are made of SKD-11 die steel with HRC 40 surface heat treatment, which achieves excellent stability and long life of the elastic heat regenerator.

[0027] In a possible implementation, a plurality of thermoelastic material positioning holes are provided on the surfaces of the piston platen 101 and the cylinder body 102 , and the thermoelastic material is positioned and installed on the thermoelastic material positioning holes.

[0028] The elastic thermo material in the regenerator of this embodiment is completely positioned on the normal plane in the axial compression direction of the elastic thermo material through the elastic thermo material positioning holes reserved on the piston pressure plate 101 and the cylinder body 102, while retaining the degree of freedom of the elastic thermo material in the axial compression direction; the guide rod 103 and the guide holes around the piston pressure plate 101 are used to make the pressure bottom plate 104 in good contact with the elastic thermo material in the axial compression direction, and only then can the elastic thermo material be completely positioned in the axial compression direction.

[0029] like Figure 2 As shown in FIG. 3 ( b ), the tubular nickel-titanium binary alloy carried by the regenerator in this embodiment is completely positioned on the normal plane in the axial compression direction through the elastic thermal material positioning holes reserved on the piston pressure plate 101 and the cylinder body 102 .

[0030] The shape of the high-efficiency heat exchange flow channel corresponding to the nickel-titanium binary alloy is often difficult to form a good seal. Figure 2As shown in FIG. 3 ( a ) and FIG. 3 ( b ), the cylinder body 102 and the piston plate 101 are divided into two areas, namely, an effective compression area and a radial sealing area. The shapes of the effective compression area 101-4 of the piston platen 101 and the effective compression area 102-4 of the cylinder body 102 are set according to the form of the elastic thermo-material, and a flow heat exchange area is formed between the effective compression area and the elastic thermo-material; the radial sealing area 101-5 of the piston platen 101 and the radial sealing area 102-5 of the cylinder body 102 are used to realize dynamic sealing during the operation of the regenerator. According to the different shapes of the elastic thermo-material, the radial sealing area 101-5 of the piston platen 101 and the radial sealing area 102-5 of the cylinder body 102 are selected to be a rounded rectangle or a circle, and the outer contour of the effective compression area is included by the outer contour of the radial sealing area, and there is a gap between the effective compression area 101-4 and the radial sealing area 101-5 of the piston platen 101 and the effective compression area 102-4 and the radial sealing area 102-5 of the cylinder body 102, and the width of the gap in the normal direction of the radial sealing area boundary is a constant value, and the size of the constant value is determined by the flow pressure drop and the size of the radial seal, so as to ensure the sealing of the regenerator while avoiding direct contact between the piston platen and the cylinder body.

[0031] Furthermore, in the space formed by the effective compression area of ​​the cylinder body, the complement of the effective compression area of ​​the piston plate 101 and the space formed by the nickel-titanium binary alloy constitutes an efficient heat exchange flow channel; and the radial sealing area of ​​the piston plate 101 and the radial sealing area of ​​the cylinder body 102 are used to achieve dynamic sealing during the operation of the regenerator. In this regard, the outer contour of the radial sealing area is selected as a circular notch shape in this embodiment, which can completely contain the outer contour of the effective compression area.

[0032] According to the design criteria of O-rings, there is a gap between the radial sealing area of ​​the piston plate 101 and the radial sealing area of ​​the cylinder body 102. According to the flow pressure drop and the size of the radial sealing groove of this embodiment, the width of the gap is 0.05 mm, which ensures the sealing of the regenerator while avoiding direct contact between the piston plate 101 and the cylinder body 102.

[0033] According to the design criteria of the O-ring, a rounded transition is used between the effective compression area 101-4 and the radial sealing area 101-5 of the piston pressure plate 101 to avoid sharp areas, thereby reducing the loss of the sealing ring and enhancing the sealing of the system.

[0034] In this embodiment, fluid interfaces 102 - 7 for connecting to an external fluid network are provided on both sides of the cylinder body 102 .

[0035] like Figure 5As shown, the elastic heat regenerator of this embodiment can implement a cascade scheme. The specific cascade scheme is as follows: the piston of the uppermost regenerator is replaced by the piston pressure plate 101, and the pressure-bearing structure of the lowermost regenerator is replaced by the pressure-bearing chassis 104, and the pressure-bearing-piston pressure plate 105 is used to replace the piston pressure plate 101, and the intermediate-level regenerator is formed with the cylinder body 102. The guide rod length 103 is lengthened, and a multi-stage cascade regenerator is formed by combining the uppermost regenerator, several intermediate-level regenerators and the lowermost regenerator. The cascade scheme can complete the utilization of a larger mass of elastic heat materials under the same driving force, thereby improving the performance of the regenerator.

[0036] Furthermore, in a multi-stage cascade regenerator, there are two ways to connect the regenerators at different stages: In series connection, the inlet and outlet of the elastic heat regenerators of adjacent stages are connected to enhance the active heat recovery performance of the elastic heat regenerator and improve the temperature span of the elastic heat regenerator; In parallel, the inlet of the elastic heat regenerator is connected to the inlet of other elastic heat regenerators, and different elastic heat regenerators are operated under the same conditions to improve the cooling capacity of the elastic heat regenerator.

[0037] like Figures 2 to 4 As shown, the assembly method of the elastic heat regenerator according to the embodiment of the present invention comprises the following steps: Installation positioning holes are provided on the piston platen 101, the cylinder body 102 and the pressure bottom plate 104 to position the piston platen 101, the cylinder body 102 and the pressure bottom plate 104 in the axial compression direction of the elastic and thermal material; The sealing material is embedded in the radial sealing groove 102-1 in the cylinder body 102, and the positioning cylindrical pin is inserted into the installation positioning hole 102-6 of the cylinder body 102, and the piston platen 101 is embedded in the cylinder body 102 through the installation positioning hole 101-6 of the piston platen 101, and then the initial shape of the elastic thermal material is adjusted through the elastic thermal material positioning hole; After ensuring that the elastic-thermal material is subjected to only axial force and does not undergo dislocation when compressed in the initial form, the guide rod 103 and the sealing material are installed in the axial sealing groove 104-1 of the pressure-bearing chassis 104, and the guide rod 103 is embedded in the piston pressure plate 101 through the installation positioning hole 104-6 on the pressure-bearing chassis 104, so that the pressure-bearing chassis 104 is in contact with the elastic-thermal material, and the sealing material is in contact with the cylinder body 102; the cylinder body 102 and the pressure-bearing chassis 104 are locked together through the connecting through holes on the cylinder body 102 and the pressure-bearing chassis 104, and the positioning cylindrical pin is pulled out to complete the assembly; Finally, the cylinder body 102 is connected to the external fluid network through the fluid interfaces 102 - 7 reserved on both sides.

[0038] The present invention breaks through the design difficulties of high-performance elastic heat regenerators, ensures the axial stress of the elastic heat material and the high efficiency of flow heat exchange, and has the characteristics of mass production, high precision, long life and high performance.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the scope of protection involved.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A regenerative heat exchanger, characterized in that: The invention comprises a piston pressure plate (101), a cylinder body (102), a guide rod (103) and a pressure-bearing chassis (104); the cylinder body (102) is arranged between the piston pressure plate (101) and the pressure-bearing chassis (104); a fluid enclosure structure for heat exchange with an elastic thermo material is formed through the cylinder body (102); the elastic thermo material is arranged inside the cylinder body (102); the piston pressure plate (101) and the pressure-bearing chassis (104) provide an axial compression force for the elastic thermo material inside the cylinder body (102); one end of the guide rod (103) is fixed to the pressure-bearing chassis (104); the other end of the guide rod (103) and the piston pressure plate (101) form a single-degree-of-freedom kinematic pair, and the movement direction of the piston pressure plate (101) is limited to the direction of axial compression of the elastic thermo material.

2. The elastic heat regenerator according to claim 1, characterized in that: The piston pressure plate (101) is capable of reciprocating axial movement along the guide rod (103), and dynamic sealing is achieved between the piston pressure plate (101) and the cylinder body (102) through a radial sealing groove (102-1) and a sealing material provided on the cylinder body (102); the cylinder body (102) and the pressure-bearing base plate (104) are tightly assembled, and static sealing is achieved through an axial sealing groove (104-1) and a sealing material provided on the pressure-bearing base plate (104).

3. The elastic heat regenerator according to claim 1, characterized in that: The cylinder body (102) is made of a hard polymer material having a tensile strength of more than 40 MPa; the processed material of the piston pressure plate (101) and the pressure-bearing bottom plate (104) has a tensile strength of more than 1 GPa and a hardness of more than HRC 40.

4. The elastic heat regenerator according to claim 1, characterized in that: A plurality of elastic-thermal material positioning holes are provided on the surfaces of the piston pressure plate (101) and the cylinder body (102) relative to each other, and the elastic-thermal material is positioned and installed on the elastic-thermal material positioning holes.

5. The elastic heat regenerator according to claim 1, characterized in that: The cylinder body (102) and the piston pressure plate (101) are both provided with two areas, namely an effective compression area and a radial sealing area; The shapes of the effective compression area (101-4) of the piston pressure plate (101) and the effective compression area (102-4) of the cylinder body (102) are set according to the morphology of the elastic thermo-material, and a flow heat exchange area is formed between the effective compression area and the elastic thermo-material; the radial sealing area (101-5) of the piston pressure plate (101) and the radial sealing area (102-5) of the cylinder body (102) are used to achieve dynamic sealing during the operation of the regenerator, the outer contour of the effective compression area is included in the outer contour of the radial sealing area, and there is a gap between the effective compression area (101-4) and the radial sealing area (101-5) of the piston pressure plate (101) and the effective compression area (102-4) and the radial sealing area (102-5) of the cylinder body (102), and the width of the gap in the normal direction of the radial sealing area boundary is a constant value.

6. The elastic heat regenerator according to claim 1, characterized in that: The radial sealing area (101-5) of the piston pressure plate (101) and the radial sealing area (102-5) of the cylinder body (102) are selected to be a rounded rectangle or a circle; A rounded transition is used between the effective compression area (101-4) and the radial sealing area (101-5) of the piston pressure plate (101).

7. The elastic heat regenerator according to claim 1, characterized in that: A fluid interface (102-7) for connecting to an external fluid network is provided on the side of the cylinder body (102).

8. The elastic heat regenerator according to claim 1, characterized in that: The guide rod (103) is lengthened, and a top-level elastic heat regenerator, a plurality of middle-level elastic heat regenerators, and a bottom-level elastic heat regenerator are combined to form a multi-stage cascade regenerator. The middle-level elastic heat regenerator uses a pressure-piston platen (105) to replace the pressure-bearing bottom plate (104) and the piston platen (101). The top-level elastic heat regenerator utilizes the multi-stage elastic heat material under the same driving force through the piston platen (101).

9. The elastic heat regenerator according to claim 8, characterized in that: In a multi-stage cascade regenerator, there are two ways to connect the regenerators at different stages: In series connection, the inlet and outlet of the elastic heat regenerators of adjacent stages are connected to enhance the active heat recovery performance of the elastic heat regenerator and improve the temperature span of the elastic heat regenerator; In parallel mode, the inlet of the elastic heat regenerator is connected with the inlet of other elastic heat regenerators, and different elastic heat regenerators are operated under the same conditions to improve the cooling capacity of the elastic heat regenerator.

10. An assembly method of the elastic heat regenerator according to any one of claims 1 to 9, characterized in that: include: Installation positioning holes are provided on the piston pressure plate (101), the cylinder body (102) and the pressure-bearing bottom plate (104) to position the piston pressure plate (101), the cylinder body (102) and the pressure-bearing bottom plate (104) in the axial compression direction of the elastic-thermal material; Embedding the sealing material into the radial sealing groove (102-1) in the cylinder body (102), inserting the positioning cylindrical pin into the installation positioning hole (102-6) of the cylinder body (102), and embedding the piston pressure plate (101) into the cylinder body (102) through the installation positioning hole (101-6) of the piston pressure plate (101), and then adjusting the initial shape of the elastic thermal material through the elastic thermal material positioning hole; After ensuring that the elastic-thermal material is subjected to only axial force and does not undergo dislocation when compressed in its initial form, the guide rod (103) and the sealing material are installed in the axial sealing groove (104-1) of the pressure-bearing chassis (104), and the guide rod (103) is embedded in the piston pressure plate (101) through the installation positioning hole (104-6) on the pressure-bearing chassis (104), while the pressure-bearing chassis (104) and the elastic-thermal material are in contact, and the sealing material and the cylinder body (102) are in contact; the cylinder body (102) and the pressure-bearing chassis (104) are locked together through the connecting through holes on the cylinder body (102) and the pressure-bearing chassis (104), and the positioning cylindrical pin is pulled out to complete the assembly.

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