JP2006317037A - Regenerator assembling method for stirling engine and regenerator applying the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a regenerator assembling method capable of reasonably and efficiently performing assembling work of a regenerator in a Stirling engine. <P>SOLUTION: One assembly is composed of a high temperature-side head 40 constituting a part of an outer shell of the Stirling engine 1, a low temperature-side heat transfer head 41, a regenerator cylinder 48 connecting the high temperature-side heat transfer head 40 and the low temperature-side heat transfer head 41, a high temperature-side internal heat exchanger 42 mounted on an inner peripheral face of the high temperature-side heat transfer head 40, and a low temperature-side internal heat exchanger 43 mounted on an inner peripheral face of the low temperature-side heat transfer head 41. Then the regenerator 70 is mounted between the high temperature-side internal heat exchanger 42 and the low temperature-side internal heat exchanger 43. The regenerator 70 is composed of an assembly of segments 71 obtained by dividing a cylindrical foam by dividing faces including axis. The plurality of segments 71 are connected by a flexible sheet 72 to constitute the segment assembly 75. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a regenerator assembly method for a Stirling engine and a regenerator to which the method is applied.

  The Stirling engine is attracting attention as a heat engine that does not cause destruction of the ozone layer because helium, hydrogen, nitrogen or the like is used as a working gas instead of Freon. In a Stirling engine used as a refrigerator, a piston is reciprocated by a power source such as a linear motor, and a displacer is synchronously reciprocated with a predetermined phase difference with respect to the piston. The piston and the displacer move working gas back and forth between the compression space and the expansion space to form a Stirling cycle. In the compression space, the temperature of the working gas increases based on the compression change, and in the expansion space, the temperature of the working gas decreases based on the expansion change. Thereby, the temperature of the high temperature side heat transfer head constituting the compression space rises, and the temperature of the low temperature side heat transfer head constituting the expansion space falls. If heat is radiated from the high-temperature heat transfer head, external heat can be absorbed by the low-temperature heat transfer head.

  In a Stirling engine, a regenerator placed between the compression space and the expansion space plays an important role. The regenerator plays a role as a heat storage means for receiving heat from a high-temperature working gas traveling from the compression space to the expansion space and transmitting the heat to a low-temperature working gas traveling from the expansion space to the compression space. In addition to a large amount of heat storage, the regenerator is required to efficiently transfer heat to and from the working gas and not to hinder the flow of the working gas as much as possible.

Various regenerators have been proposed so far. Patent Document 1 describes a regenerator made of a metal mesh. Patent Document 2 describes a regenerator using a foam metal or a fibrous metal as a matrix. Patent Document 3 describes a regenerator in which fine metal wires knitted in knitting are rounded into a donut shape. Patent Document 4 describes a regenerator configured by winding a resin film having protrusions in a spiral shape.
JP-A-5-272825 (pages 4 to 6, FIGS. 1 to 3) Japanese Patent Laid-Open No. 5-288416 (pages 3 to 6, FIGS. 1 to 9) Japanese Patent Laid-Open No. 7-151402 (2nd page to 3rd page, FIG. 1 to FIG. 2) Japanese Patent Laying-Open No. 2003-222422 (pages 8 to 13, FIG. 1 to FIG. 21)

  A Stirling engine used as a refrigerator includes a high temperature side heat transfer head, a low temperature side heat transfer head, and a regenerator cylinder that connects the high temperature side heat transfer head and the low temperature side heat transfer head. . A ring-shaped high-temperature side internal heat exchanger is mounted on the inner peripheral surface of the high-temperature side heat transfer head, and a ring-shaped low-temperature side internal heat exchanger is mounted on the inner peripheral surface of the low-temperature side heat transfer head. A regenerator is mounted between the side internal heat exchanger and the low temperature side internal heat exchanger. In the present invention, the high-temperature side heat transfer head and the high-temperature side internal heat exchanger, and the low-temperature side heat transfer head and the low-temperature side internal heat exchanger are securely mounted by a pressure bonding process by a machine or an adhesion process by welding or brazing. A regenerator assembly method (the order in which the regenerators are assembled) is changed so that heat transfer can be carried out satisfactorily. An object of the present invention is to provide a regenerator configuration and a regenerator assembly method therefor.

  (1) In order to achieve the above object, in the Stirling engine regenerator assembling method of the present invention, the high temperature side heat transfer head, the low temperature side heat transfer head, and the high temperature side constituting a part of the outer shell of the Stirling engine A regenerator cylinder connecting the heat transfer head and the low temperature side heat transfer head, a high temperature side internal heat exchanger mounted on the inner peripheral surface of the high temperature side heat transfer head, and an inner peripheral surface of the low temperature side heat transfer head The low temperature side internal heat exchanger to be assembled into one assembly, and a regenerator is mounted between the high temperature side internal heat exchanger and the low temperature side internal heat exchanger.

  In the high temperature side heat transfer head, the low temperature side heat transfer head, and the regenerator cylinder, different metals are joined together by welding or brazing. It is desirable to join the high-temperature side internal heat exchanger and the low-temperature side internal heat exchanger to the head side by welding or brazing, but the low-temperature side internal heat exchanger inserted before the regenerator is welded or brazed. Even if it is possible to apply, for the high temperature side internal heat exchanger inserted after the regenerator, if the regenerator is made of resin material, the regenerator may be damaged by heat, so welding And brazing could not be used. According to the present invention, the regenerator is assembled after assembling only metal parts such as the high temperature side heat transfer head, the low temperature side heat transfer head, the regenerator cylinder, the high temperature side internal heat exchanger, and the low temperature side internal heat exchanger. In assembly, welding and brazing can be employed without restriction. In addition, machining such as crimping and caulking can be employed without restriction, and assembly can be automated.

  (2) Further, in the present invention, the regenerator to which the above regenerator assembling method is applied is made of a cylindrical foam, and is constituted by a set of segments obtained by dividing the foam by a dividing surface including an axis. It is characterized by.

  According to this structure, since it is divided into segments, even if the foam is hard, the regenerator can be inserted into the regenerator cylinder through the center hole of the internal heat exchanger on the high temperature side of the assembly. Become.

  (3) The present invention is characterized in that, in the regenerator configured as described above, the foam is a graphite foam.

  Since the graphite foam has high heat resistance and high heat capacity per unit weight, the Stirling engine can be operated with high efficiency.

  (4) Further, the present invention is characterized in that, in the regenerator having the above-described configuration, a plurality of segment assemblies in which a plurality of segments are connected by a flexible sheet are combined.

  According to this configuration, all the segments constituting the cylindrical shape are not connected to each other by a flexible sheet to form one segment assembly, but the entire segments are divided into several groups and flexible in groups. Since a plurality of segment aggregates are obtained by connecting with a sheet, if one segment aggregate is picked up, it is wound and squeezed through the center hole of the high temperature side internal heat exchanger The diameter can be easily reduced to such an extent that can be inserted. Therefore, the operation of mounting the regenerator from the center hole of the high temperature side internal heat exchanger can be easily performed.

  (5) Further, in the regenerator assembly method for a Stirling engine of the present invention, the segment assembly having the above configuration is rolled and inserted between the low temperature side internal heat exchanger and the high temperature side internal heat exchanger, and then expanded and regenerated. It is characterized by wearing a vessel.

  According to this configuration, the regenerator can be mounted smoothly and speedily.

According to the present invention, the low temperature side heat transfer head, the high temperature side heat transfer head, the regenerator cylinder connecting the low temperature side heat transfer head and the high temperature side heat transfer head, and the inner peripheral surface of the low temperature side heat transfer head are mounted. Since the regenerator is assembled after assembling metal parts such as the low-temperature side internal heat exchanger and the high-temperature side internal heat exchanger mounted on the inner peripheral surface of the high-temperature side heat transfer head, It is possible to obtain an assembly that can be joined by welding or brazing, is strong, and has good heat transfer between components. In addition, since the regenerator to which this assembling method is applied is constituted by a set of segments obtained by dividing a cylindrical foam by a dividing surface including an axis, even if the foam is hard, the assembly The regenerator can be inserted into the regenerator cylinder through the central hole of the hot side internal heat exchanger.

  First, the structure of a Stirling engine to which the present invention is applied will be described with reference to FIG. FIG. 1 is a sectional view of a Stirling engine. This Stirling engine is used as a refrigerator.

  The Stirling engine 1 is of a free piston type, and the cylinders 10 and 11 are the center of the assembly. The axes of the cylinders 10 and 11 are aligned on the same straight line. A piston 12 is inserted into the cylinder 10, and a displacer 13 is inserted into the cylinder 11. The piston 12 and the displacer 13 reciprocate without contacting the inner walls of the cylinders 10 and 11 by the mechanism of the gas bearing during operation of the Stirling engine 1. The piston 12 and the displacer 13 move with a predetermined phase difference.

  A cup-shaped magnet holder 14 is provided at one end of the piston 12. A displacer shaft 15 protrudes from one end of the displacer 13. The displacer shaft 15 penetrates the piston 12 and the magnet holder 14 so as to be slidable in the axial direction.

  The cylinder 10 holds the linear motor 20 outside the portion corresponding to the operation region of the piston 12. The linear motor 20 includes an outer yoke 22 having a coil 21, an inner yoke 23 provided so as to be in contact with the outer peripheral surface of the cylinder 10, and a ring shape inserted into an annular space between the outer yoke 22 and the inner yoke 23. Magnet 24 and synthetic resin end brackets 25 and 26 for holding the outer yoke 22 and the inner yoke 23 in a predetermined positional relationship. The magnet 24 is fixed to the magnet holder 14.

  The central portion of the spring 30 is fixed to the hub portion of the magnet holder 14. The center portion of the spring 31 is fixed to the displacer shaft 15. The outer peripheral portions of the springs 30 and 31 are fixed to the end bracket 26. A spacer 32 is disposed between the outer peripheries of the springs 30 and 31, whereby the springs 30 and 31 maintain a certain distance. The springs 30 and 31 are disc-shaped materials with spiral cuts and resonate the displacer 13 with a predetermined phase difference (generally about 90 ° phase difference) with respect to the piston 12. Play a role.

  A high temperature side heat transfer head 40 and a low temperature side heat transfer head 41 are arranged outside the portion of the cylinder 11 corresponding to the operating region of the displacer 13. The high temperature side heat transfer head 40, the low temperature side heat transfer head 41, and the regenerator cylinder 48 described later constitute a part of the outer shell of the Stirling engine 1.

  The high temperature side heat transfer head 40 has a ring shape, and the low temperature side heat transfer head 41 has a cap shape, both of which are made of a metal having good heat conductivity such as copper or copper alloy. A ring-shaped high-temperature side internal heat exchanger 42 is mounted on the inner peripheral surface of the high-temperature side heat transfer head 40, and a ring-shaped low-temperature side internal heat exchanger 43 is also mounted on the inner peripheral surface of the low-temperature side heat transfer head 41. Installed. Each of the high temperature side internal heat exchanger 42 and the low temperature side internal heat exchanger 43 has air permeability, and transfers the heat of the working gas passing through the inside to the high temperature side heat transfer head 40 and the low temperature side heat transfer head 41. The high temperature side internal heat exchanger 42 and the low temperature side internal heat exchanger 43 can be formed, for example, by corrugating and compressing a thin plate of copper or copper alloy.

  The high temperature side heat transfer head 40 and the low temperature side heat transfer head 41 are thus supported outside the cylinder 11 with the high temperature side internal heat exchanger 42 and the low temperature side internal heat exchanger 43 interposed therebetween. The cylinder 10 and the pressure vessel 50 are connected to the high temperature side heat transfer head 40.

  An annular space surrounded by the high temperature side heat transfer head 40, the cylinders 10 and 11, the piston 12, the displacer 13, the displacer shaft 15, and the high temperature side internal heat exchanger 42 becomes a compression space 45. A space surrounded by the low temperature side heat transfer head 41, the cylinder 11, the displacer 13, and the low temperature side internal heat exchanger 43 becomes an expansion space 46.

  A regenerator 70 is disposed between the high temperature side internal heat exchanger 42 and the low temperature side internal heat exchanger 43. The structure of the regenerator 70 will be described in detail later. A regenerator cylinder 48 wraps the outside of the regenerator 70 to form an airtight passage between the high temperature side heat transfer heads 40 and 41. The regenerator cylinder 48 can be formed of stainless steel, for example. Both ends of the regenerator cylinder 48 are soldered to the inner surfaces of the high temperature side heat transfer head 40 and the low temperature side heat transfer head 41, and the high temperature side heat transfer head 40 and the low temperature side heat transfer head 41 are connected by the regenerator cylinder 48. The

  A cylindrical pressure vessel 50 wraps the linear motor 20, the cylinder 10, and the piston 12. A space on the outer peripheral side of the cylinder 10 inside the pressure vessel 50 is a back pressure space 51. On the peripheral surface of the pressure vessel 50, a terminal portion 52 for supplying electric power to the linear motor 20 and a pipe 53 for enclosing working gas therein are arranged. The pipe 53 is sealed after a working gas having a predetermined atmospheric pressure is sealed in the pressure vessel 50.

  A dynamic vibration absorber 60 is attached to the outer surface of the pressure vessel 50. The main component of the dynamic vibration absorber 60 is a plate-like spring 61 in which a plurality of thin plate-like springs are stacked, and a mass 62 disposed on the periphery of the spring 61. The center of the spring 61 is fixed to the shaft 63 protruding from the center of the end face of the pressure vessel 50.

  The Stirling engine 1 operates as follows. When an alternating current is supplied to the coil 21 of the linear motor 20, a magnetic field penetrating the magnet 24 is generated between the outer yoke 22 and the inner yoke 23, and the magnet 24 reciprocates in the axial direction. By supplying power with a frequency that matches the resonance frequency determined by the total mass of the piston system (piston 12, magnet holder 14, magnet 24, and spring 30) and the spring constant of the spring 30, the piston system has a smooth sine. Start wavy reciprocating motion.

  In the displacer system (the displacer 13, the displacer shaft 15, and the spring 31), the resonance frequency determined by the total mass and the spring constant of the spring 31 is set to resonate with the driving frequency of the piston 12.

  By the reciprocating motion of the piston 12, the compression space 45 is repeatedly compressed and expanded. As the pressure changes, the displacer 13 also reciprocates. At this time, a phase difference is generated between the displacer 13 and the piston 12 due to flow resistance between the compression space 45 and the expansion space 46. In this way, the displacer 13 having a free piston structure vibrates in synchronization with the piston 12 with a predetermined phase difference.

  With the above operation, a Stirling cycle is formed between the compression space 45 and the expansion space 46. In the compression space, the temperature of the working gas increases based on the compression change, and in the expansion space 46, the temperature of the working gas decreases based on the expansion change. For this reason, the temperature of the compression space 45 rises and the temperature of the expansion space 46 falls.

  The working gas that travels between the compression space 45 and the expansion space 46 during operation passes through the high-temperature side internal heat exchanger 42 and the low-temperature side internal heat exchanger 43 to transfer the heat of the working gas to the high-temperature side internal heat exchanger. The temperature is transferred to the high temperature side heat transfer head 40 and the low temperature side heat transfer head 41 through 42 and the low temperature side internal heat exchanger 43. Since the working gas from the compression space 45 toward the expansion space 46 is at a high temperature, the high temperature side heat transfer head 40 is heated and the high temperature side heat transfer head 40 becomes a worm head. Since the working gas from the expansion space 46 toward the compression space 45 has a low temperature, the low-temperature side heat transfer head 41 is cooled, and the low-temperature side heat transfer head 41 becomes a cold head. The Stirling engine 1 functions as a refrigeration engine by dissipating heat from the high temperature side heat transfer head 40 to the atmosphere and lowering the temperature of the specific space with the low temperature side heat transfer head 41.

  The regenerator 70 functions to pass only the working gas without transferring the heat of the compression space 45 and the expansion space 46 to the counterpart space. The hot working gas that has entered the regenerator 70 from the compression space 45 via the high temperature side internal heat exchanger 42 gives its heat to the regenerator 70 when passing through the regenerator 70, and the expansion space with the temperature lowered. 46 flows in. The low-temperature working gas that has entered the regenerator 70 from the expansion space 46 through the low-temperature side internal heat exchanger 43 collects heat from the regenerator 70 when passing through the regenerator 70, and the compressed space in a state where the temperature has risen. 45. That is, the regenerator 70 serves as a heat storage means.

  When the piston 12 and the displacer 13 reciprocate and the working gas moves, the Stirling engine 1 is vibrated. The dynamic vibration absorber 60 suppresses this vibration.

  Next, the structure of the regenerator 70 and its assembling method will be described. 2 to 7 are sectional views of the heat transfer head portion showing the flow of assembling the regenerator. 2 to 4 and 6 are cross-sectional views taken along a plane including the axis, and FIGS. 5 and 7 are cross-sectional views taken along a plane perpendicular to the axis. 8 to 10 are perspective views of the regenerator segment, in which FIG. 8 shows a state at the time of assembly, FIG. 9 shows a state after the assembly, and FIG. 10 uses a flexible sheet. This shows the situation of a segment aggregate. FIG. 11 is a perspective view of a robot hand used for assembling, and FIG. 12 is a perspective view showing a situation in which a segment assembly is assembled using the robot hand.

  The regenerator 70 is formed from a cylindrical open cell foam. As the foam, expanded graphite having a high heat capacity per unit weight is selected. The graphite foam is divided into a plurality of segments 71 along a dividing plane including a cylindrical axis. In the embodiment, the total number of segments 71 is 16, and 8 of them are shown in FIGS. The eight segments 71 are connected by a flexible sheet 72 (see FIG. 10) on the inner peripheral surface side of the cylinder to form a segment assembly 75 (see FIGS. 4 and 5). As the flexible sheet 72, a heat-resistant synthetic resin film is used, and the segment 71 is pasted with an adhesive or an adhesive material.

  The assembly of the segment assemblies 75 is performed by an industrial robot (not shown) provided with the robot hand 80 shown in FIG. The robot hand 80 includes two thin plate holding blades 81 that sandwich the segment 71 and a thin plate holding blade 82 that supports the segment assembly 75 from the flexible sheet 72. A notch 73 for engaging the holding blade 81 is formed on the boundary surface between the segment 71 and the adjacent segment. The notches 73 are formed at both end portions of all the segments 71 so as to be symmetrical with respect to the axial direction. The reason why all the segments 71 are formed is to average the pressure in the circumferential direction of the regenerator 70, and the symmetrical shape with respect to the axial direction is to maintain the symmetry of the reciprocating flow of the working gas.

  When the notch 73 is provided in the segment 71, the pressure drop of the working gas in the regenerator 70 is reduced, so that the operating condition of the Stirling cycle is changed. In order to compensate for this, it is necessary to extend the segment 71 in the axial direction at a portion other than the notch 73 so that a pressure drop equivalent to that without the notch occurs. When the segment 71 is extended, the operating condition of the Stirling cycle is recovered, and the interval between the high temperature side heat transfer head 40 and the low temperature side heat transfer head 41 is widened to relax the axial temperature gradient in the regenerator cylinder 48. The following effects can also be obtained.

  Prior to assembly of the regenerator 70, the high temperature side heat transfer head 40, the low temperature side heat transfer head 41, the regenerator cylinder 48, the high temperature side internal heat exchanger 42, and the low temperature side internal heat exchanger 43 are assembled. First, the high temperature side heat transfer head 40, the low temperature side heat transfer head 41, and the regenerator cylinder 48 are combined as shown in FIG. 2, and the high temperature side heat transfer head 40, the regenerator cylinder 48, and the low temperature side heat transfer head 41 are combined. The regenerator cylinders 48 are joined by welding or brazing, respectively. You may join by crimping.

  Next, as shown in FIG. 3, the low temperature side internal heat exchanger 43 is inserted into the low temperature side heat transfer head 41, and the high temperature side internal heat exchanger 42 is inserted into the high temperature side heat transfer head 40. The low temperature side heat transfer head 41 and the low temperature side internal heat exchanger 43, and the high temperature side heat transfer head 40 and the high temperature side internal heat exchanger 42 are joined by welding or brazing, respectively. You may join by crimping. Thereby, the heat transfer head assembly A is completed.

The segment assembly 75 is inserted into the heat transfer head assembly A. The two robot hands 80 hold the segments 71 at both ends of one segment assembly 75 including the flexible sheets 72 connected thereto. In this state, the position and angle of the robot hand 80 are changed, and the segment assembly 75 is rounded down and the diameter of the segment assembly 75 is reduced. The diameter of the segment assembly 75 is reduced to such an extent that it passes through the central hole of the high temperature side internal heat exchanger 42.
FIG. 8 shows this state.

  The segment assembly 75 in a state of being rounded and recessed in this manner is inserted into the space between the high temperature side internal heat exchanger 42 and the low temperature side internal heat exchanger 43 through the center hole of the high temperature side internal heat exchanger 42. 4 and 5 show this state. When the segment assembly 75 enters the space between the high temperature side internal heat exchanger 42 and the low temperature side internal heat exchanger 43, the robot hand 80 is opened and the segment assembly 75 is released. Then, the segment assembly 75 is unrolled by the elasticity of the flexible sheet 72, and each segment 71 is in close contact with the inner peripheral surface of the regenerator cylinder 48 while drawing an arch. FIG. 9 shows this state.

  The same operation as above is repeated for another segment assembly 75. When the next segment assembly 75 is released and expanded aiming at the space not occupied by the previously inserted segment assembly 75, the inner peripheral surface of the regenerator cylinder 48 is totaled as shown in FIGS. It will be covered with 16 segments 71. Thereby, the assembly of the regenerator 70 is completed. Thereafter, other parts are combined with the heat transfer head assembly A to complete the Stirling engine 1.

  In this embodiment, the regenerator 70 is divided into 16 segments 71, but the number of divisions is not particularly limited. If the number of divisions is large, it is easy to wind and squeeze the segment aggregate 75, but on the other hand, the processing cost for dividing is increased. The reverse is true if the number of divisions is small. It is preferable to select a numerical value from 8 divisions to 16 divisions to balance operability and processing cost.

  The number of segments 71 constituting the segment aggregate 75 is not limited to half the total number of segments 71. What is necessary is just to determine suitably so that the sum total of the number of segments for every segment aggregate | assembly 75 may become the total number of segments.

  In this embodiment, since the regenerator 70 is configured by using a hard foam called expanded graphite, the regenerator 70 must be divided into a large number of segments 71 in order to pass through the central hole of the high temperature side internal heat exchanger 42. Although it was not obtained, a foam that is softer and compressible can be inserted even if the number of divisions is reduced. If it is a very soft material such as a soft polyethylene foam, it can be squeezed through the central hole of the high-temperature side internal heat exchanger 42 without being divided at all.

  Although the embodiments of the present invention have been described above, various modifications can be made without departing from the spirit of the invention.

  The present invention is applicable not only to a Stirling engine as a refrigerator but also to a Stirling engine as an external combustion engine.

Cross section of Stirling engine First sectional view of the heat transfer head portion Second sectional view of the heat transfer head portion Third sectional view of the heat transfer head portion Fourth sectional view of the heat transfer head portion 5th sectional view of the heat transfer head part 6th sectional view of a heat transfer head part Perspective view of regenerator segment FIG. 8 is a perspective view of a regenerator segment showing a state different from FIG. The perspective view which shows the condition which forms a segment aggregate | assembly using a flexible sheet | seat Robot hand perspective view The perspective view which shows the condition which assembles a segment aggregate using a robot hand

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirling engine 40 High temperature side heat transfer head 41 Low temperature side heat transfer head 42 High temperature side internal heat exchanger 43 Low temperature side internal heat exchanger 48 Regenerator cylinder 70 Regenerator 71 Segment 72 Flexible sheet A Heat transfer head assembly

Claims (5)

High temperature side heat transfer head, low temperature side heat transfer head constituting part of outer shell of Stirling engine, regenerator cylinder connecting the high temperature side heat transfer head and low temperature side heat transfer head, and high temperature side heat transfer head After the high temperature side internal heat exchanger mounted on the inner peripheral surface of the head and the low temperature side internal heat exchanger mounted on the inner peripheral surface of the low temperature side heat transfer head are combined into one assembly,
A regenerator assembly method for a Stirling engine, wherein a regenerator is mounted between the high temperature side internal heat exchanger and the low temperature side internal heat exchanger. A regenerator to which the regenerator assembly method according to claim 1 is applied,
A regenerator comprising a cylindrical foam and comprising a set of segments obtained by dividing the foam by a dividing surface including an axis.   The regenerator according to claim 2, wherein the foam is a graphite foam.   The regenerator according to claim 2 or 3, wherein a plurality of segment assemblies in which a plurality of the segments are connected by a flexible sheet are combined.   The segment assembly according to claim 4 is rolled, inserted between the high-temperature side internal heat exchanger and the low-temperature side internal heat exchanger, and then deployed to mount the regenerator. The regenerator assembling method of the described Stirling engine.

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