JP2011027272A - Partition member, cold storage device, and cold storage device type refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent leakage and mixing of cold storage materials while reducing cost, with respect to a partition member suitable to be used as a partition of the cold storage materials, a cold storage device, and a cold storage device type refrigerator. <P>SOLUTION: Inside of a cold storage device cylinder 12 is filled with the cold storage materials 17, 18, and the partition member is mounted to the cold storage device 10 through which coolant gas passes for preventing the cold storage materials 17, 18 from leaking to the outside of the cold storage device 10. The partition member has a cylindrical body 21 mounted to the cold storage device cylinder 12, and a wire gauze 22 and a punching plate 23 provided for the cylindrical body 21 for preventing the cold storage materials 17, 18 from leaking to the outside of the cold storage device 10. A knurling work part 28 formed with irregularity for engaging with an inner wall of the cold storage device cylinder 12 is provided on a mounting surface where the cylindrical body 21 is mounted to the cold storage device cylinder 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a partition member, a regenerator, and a regenerator type, and more particularly to a partition member, a regenerator, and a regenerator type that are suitable for use as a partition for a regenerator material.

  In general, GM refrigerators, Stirling cycle refrigerators, pulse tube refrigerators, etc. are used as regenerator-type cryogenic refrigerators that use a gas refrigerant such as helium and obtain a low temperature using a regenerator containing a regenerator. Are known. For example, in a GM refrigerator, a compressed refrigerant gas (for example, helium gas) is supplied to an expander having a regenerator constituting a displacer and a cylinder into which the regenerator is inserted, and the refrigerant gas is supplied into the expander. It is configured to obtain cold by adiabatic expansion.

  Generally, a lead sphere or a magnetic regenerator sphere is used as the regenerator material of the regenerator. The regenerator material is filled in the regenerator cylinder that constitutes the regenerator, but the upper and lower end parts of the regenerator cylinder sandwich the regenerator material so that the regenerator material does not leak from the upper end part or the lower end part of the regenerator cylinder. A partition member is disposed. Conventionally, a felt has been used as the partition member (see Patent Document 1).

  FIG. 10 is a cross-sectional view of the regenerator 10 using felt as a partition material. The regenerator 1 shown in the figure has a configuration in which felts 4A and 4B are provided to function as partition members at the upper and lower portions of the regenerator material 3 housed in the regenerator cylinder 2.

  On the other hand, in a cryogenic refrigerator that realizes an extremely low temperature of 10K or less, a plurality of types of cold storage materials are used. In addition to the upper part and the lower part, the regenerator is also provided with a partition member at a position where different kinds of regenerator materials are defined, so that different kinds of regenerators are not mixed with each other. The functions required of the partition member used in this way include that the refrigerating machine operating posture and the reciprocating motion of the refrigerant gas do not cause leakage of the regenerator material from the cylindrical container or mixing in the cylindrical container, and the refrigerant gas For example, it should not disturb the flow as much as possible.

  However, when felt is used as the partitioning member, the felt is crushed by the pressure when the regenerator material is charged, and not only the pressure loss increases, but also the position of the felt is not stabilized due to changes in the refrigerator posture and refrigerant gas pressure. There was a problem that leakage of the regenerator material mixed.

  In order to solve this problem, the applicant proposed in Patent Document 2 a partition member having a structure in which a metal mesh that prevents passage of the regenerator material is sandwiched between plates in which openings for allowing the refrigerant gas to pass are formed. did. FIG. 11 shows the partition member 5 disclosed in Patent Document 2. 11A is a front view of the partition member 5, and FIG. 11B is a cross-sectional view taken along the line AA in FIG. 10A.

  The wire mesh 8 that prevents passage of the cold storage material is configured to be sandwiched between a pair of plates 6 and 7. Further, openings 6a and 7a are formed in the pair of plates 6 and 7, and the refrigerant gas is configured to pass through the openings 6a and 7a. Since this partition member 5 does not use a felt, there is no felt crushing and pressure loss can be reduced.

Japanese Patent Laid-Open No. 06-221703 Japanese Patent No. 3996537

  However, in the partition member 5 disclosed in Patent Document 2, it is necessary to form a plurality of substantially elliptical openings 6a and 7a on the metal plates 6 and 7, and machining (such as electric discharge machining) is troublesome, and manufacturing is difficult. There was a problem that the cost would increase.

  Further, it is advantageous to set the shape of the openings 6a and 7a to be large from the viewpoint of smoothing the flow of the refrigerant gas. However, if the shape is set large, the metal mesh 8 is not sufficiently held, and leakage of the regenerator material is prevented. It becomes a cause. For this reason, the shapes of the openings 6a and 7a are complicated, and this also causes a problem that the processing of the openings 6a and 7a becomes troublesome.

  The present invention has been made in view of the above points, and an object thereof is to provide a partition member, a regenerator, and a regenerator type capable of preventing leakage and mixing of the regenerator material while reducing costs.

From the first point of view, the above problem is
The regenerator material is filled with a regenerator material and is attached to a regenerator through which refrigerant gas passes, and is a partition member that prevents the regenerator material from leaking out of the regenerator,
A cylindrical body mounted on the regenerator cylinder;
A leakage preventing member provided on the cylindrical main body and preventing the cold storage material from leaking out of the cold storage;
And it can solve by the partition member characterized by providing the mounting surface in which the unevenness | corrugation which bites into the inner wall of the said cool storage cylinder was provided in the mounting surface mounted to the said cool storage cylinder of the said cylindrical main body. .

  According to the partition member of the disclosure, the mounting surface on which the concave and convex portions that bite into the inner wall of the regenerator cylinder are provided on the mounting surface that is mounted on the regenerator cylinder of the cylindrical main body, The inner wall of the regenerator cylinder is in close contact with the inner wall of the regenerator cylinder, and leakage of the regenerator material to the outside of the regenerator can be prevented.

FIG. 1 is a perspective view of a partition member according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state in which the partition member according to the embodiment of the present invention is attached to the regenerator cylinder. FIG. 3: has shown the partition member which is one Embodiment of this invention, (A) is a front view, (B) is sectional drawing which follows the BB line in (A). FIG. 4 is a cross-sectional view of a regenerator that is an embodiment of the present invention. FIG. 5 is a cross-sectional view of a refrigerator that is an embodiment of the present invention. FIG. 6 is a diagram illustrating an example of a knurled eye of the knurled portion (No. 1). FIG. 7 is a diagram illustrating an example of the knurled eye of the knurled portion (part 2). FIG. 8 is a diagram showing an example of the knurled eye of the knurled portion (No. 3). FIG. 9 is a perspective view of a partition member which is a reference example of the present invention. FIG. 10 is a cross-sectional view showing a regenerator as an example of the prior art. 11A and 11B show a partition member as an example of the prior art, in which FIG. 11A is a front view and FIG. 11B is a cross-sectional view taken along line AA in FIG.

  Next, embodiments of the present invention will be described with reference to the drawings.

  1 to 5 show a partition member, a regenerator, and a refrigerator that are one embodiment of the present invention. First, the regenerator 10 which is one Embodiment of this invention is demonstrated using FIG.

  FIG. 4 is a cross-sectional view schematically showing the regenerator 10 constituting the displacer. The regenerator 10 constitutes a second-stage displacer of a two-stage Gifford-McMahon refrigerator (hereinafter simply referred to as a refrigerator) as shown in FIG. 5, for example. The regenerator 10 shown in the figure has a regenerator cylinder 12, an upper lid 14, a lower lid 16, a first regenerator material 17, a second regenerator material 18, three partition members 20 (20A to 20C), and the like. is doing.

  The regenerator cylinder 12 has a cylindrical shape and is made of metal or resin. The upper lid 14 is disposed at the upper end portion of the regenerator cylinder 12. Further, the lower lid 16 is disposed at the lower end of the regenerator cylinder 12. The upper lid 14 is formed with a gas flow path 14 </ b> A that connects the inside of the regenerator cylinder 12 and the outside, and the lower lid 16 is formed with a gas flow path 16 </ b> A that connects the inside of the regenerator cylinder 12 and the outside.

  The partition member 20 </ b> A (20) is disposed below the upper lid 14. Further, the partition member 20 </ b> B (20) is disposed at a substantially central position of the regenerator cylinder 12. Furthermore, the partition member 20 </ b> C (20) is disposed on the upper portion of the lower lid 16. The partition members 20A to 20C have the same configuration. For this reason, in the description common to the partition members 20A to 20C, the partition member 20 is described. The detailed configuration of the partition member 20 will be described later for convenience of explanation.

The first cold storage material 17 is filled between the partition member 20A and the partition member 20B. Moreover, the cool storage material 18 is filled between the partition member 20B and the partition member 20C. The 1st cool storage material 17 is comprised by many granular materials (lead ball) which consist of lead, for example, and the average particle diameter of these lead balls whole is 0.4 mm, for example. The second cold accumulating material 18 is a magnetic cold accumulating material composed by, for example, HoCu ₂ or multiple particulates of magnetic material such as ErNi0.9Co0.1.

  The partition members 20 </ b> A and 20 </ b> C prevent the first and second regenerator materials 17 and 18 from leaking out of the regenerator cylinder 12. Moreover, the partition member 20B prevents the 1st cool storage material 17 and the 2nd cool storage material 18 from mixing (mixing). In addition, the average particle diameter of the whole granular material of the 1st and 2nd cool storage materials 17 and 18 is about 0.2 mm, for example.

  Next, a refrigerator refrigerator to which the above regenerator 10 is applied will be described with reference to FIG.

  FIG. 5 is a cross-sectional view schematically showing a refrigerator 40 according to an embodiment of the present invention. The refrigerator 40 shown in the figure receives a compressor 45 that generates compressed refrigerant gas (hereinafter referred to as “compressed refrigerant gas”), and supply of the compressed refrigerant gas from the compressor 45. This is a two-stage GM refrigerator including an expander 60 that adiabatically expands to obtain cold and a power chamber 90 disposed on the expander 60. As the refrigerant gas, for example, helium gas is used.

  The expander 60 includes a two-stage cylinder 70 and a two-stage displacer piston 80 inserted into the cylinder 70. The cylinder 70 includes a first-stage cylinder portion 72 having a relatively large inner diameter, a second-stage cylinder portion 74 having a relatively small inner diameter, and cooling that closes one end of the second-stage cylinder portion 74. Stage 76. Hereinafter, the cooling stage 76 and its vicinity are referred to as “low temperature part”.

  The upper and other ends of the second-stage cylinder portion 74 are connected to the lower end of the first-stage cylinder portion 72. A collar portion 78 is fixed to the upper end of the first-stage cylinder portion 72. Hereinafter, the opening on the flange portion 78 side and the vicinity thereof in the first-stage cylinder portion 72 are referred to as a “high temperature portion”. The opening on the high temperature side of the first stage cylinder 72 is closed by the power chamber 90.

  The first-stage cylinder portion 72 and the second-stage cylinder portion 74 are formed of a rigid material having low heat conductivity and high airtightness, such as stainless steel. On the other hand, the cooling stage 76 is made of a material having good thermal conductivity such as copper.

  The displacer piston 80 includes a first regenerator (first displacer piston) 82 and the regenerator 10 described with reference to FIG. In addition, when it is necessary to explain separately from the first regenerator 82, the regenerator 10 is particularly described as the second regenerator 10.

  The first regenerator 82 is inserted into the first-stage cylinder portion 72. The first regenerator 82 is filled with a first regenerator material made of a large number of lead balls and a second regenerator material made of a large number of metal meshes in this order as viewed from the low temperature part side (first 1 and 2 cold storage materials do not appear in the figure). In addition, a sealing material 86 (for example, an annular slipper seal) is attached to the outer peripheral surface of the first regenerator 82.

  The second regenerator 10 is connected to the end face on the low temperature part side of the first regenerator 82 via a connecting device 88, and the second stage cylinder part from the low temperature part side region of the first stage cylinder part 72. 74 is inserted into 74. The second regenerator 10 is arranged so that the lower lid 16 is positioned on the cooling stage 76 side.

  One end of the piston rod 84 is connected to the end surface of the first regenerator 82 on the high temperature part side. The other end of the piston rod 84 is connected to a crank (not shown). This crank is connected to the rotating shaft of the motor M in the power chamber 90 disposed on the collar portion 78. The motor M generates power for reciprocating the displacer piston 80 in the axial direction of the cylinder 70.

  The displacer piston 80 always has a space S1 between the end surface on the low temperature part side of the second regenerator 10 and the inner bottom surface of the cooling stage 76, and the end surface on the low temperature part side of the first regenerator 82 and the second stage. A reciprocating motion is performed while always forming a space S2 between the cylinder portion and the end surface on the high temperature portion side. At this time, a space S <b> 3 is formed between the end surface of the first regenerator 82 on the high temperature side and the bottom surface of the housing 92 that defines the power chamber 90. The size of each of the spaces S1, S2, and S3 changes as the displacer piston 80 reciprocates.

  In the power chamber 90, a rotary valve device V including two valves V1 and V2 is disposed. The rotary valve device V receives power from the motor M, for example. A pipe 50 is connected to one end of each of the valves V1 and V2, and a compressed refrigerant gas supply pipe 52 that receives supply of compressed refrigerant gas from the compressor 45 or a refrigerant gas discharged from the expander 60 is connected to each other end. A refrigerant gas recovery pipe 54 to be supplied is connected. One end of the pipe 50 is connected to an opening 92 a formed at the bottom of the housing 92.

  The compressed refrigerant gas generated by the compressor 45 is supplied from the opening 92a into the cylinder 70 through the compressed refrigerant gas supply pipe 52, the rotary valve device V (valve V1), and the pipe 50. The refrigerant gas supplied into the cylinder 70 reaches S1 through the space S3, the first regenerator 82, the space S2, and the second regenerator 10.

  The refrigerant gas supplied into the cylinder 70 is discharged out of the cylinder 70 from the opening 92a at a predetermined timing. The discharged refrigerant gas is recovered by the compressor 45 through the pipe 50, the rotary valve device V (valve V2), and the medium gas recovery pipe 54. The timing of supply of the compressed refrigerant gas into the cylinder 70 and the timing of discharge of the refrigerant gas to the outside of the cylinder 70 are controlled by, for example, the rotary valve device V.

  During the operation of the refrigerator 50, the supply of the compressed refrigerant gas into the cylinder 70 and the discharge of the refrigerant gas from the cylinder 70 are repeated under a predetermined phase difference with the reciprocating motion of the displacer piston 80. As the displacer piston 80 reciprocates, heat absorption occurs in the spaces S1 and S2.

  As the cooled refrigerant gas passes through the second regenerator 10 and the first regenerator 82, the regenerator material in the regenerators 10 and 82 is gradually cooled, and eventually reaches a substantially constant temperature. At this time, the temperature reached by the second regenerator 10 is lower than the temperature reached by the first regenerator 82, and is cooled to about 4K, for example.

  Next, the partition member 20 which is one Embodiment of this invention is demonstrated.

  The partition member 20 is disposed at the upper end portion and the lower end portion of the regenerator tube 12 as described above, thereby preventing the first and second regenerator materials 17 and 18 from leaking out of the regenerator tube 12. In the regenerator cylinder 12, the first regenerator material 17 and the second regenerator material 18 are arranged at the boundary position to prevent the first and second regenerator materials 17 and 18 from mixing with each other. It is.

  The partition member 20 includes a cylindrical main body 21, a wire mesh 22, a punching plate 23, and the like (the wire mesh 22 and the punching plate 23 constitute a leakage prevention member described in claims). The cylindrical main body 21 is formed of a metal such as stainless steel and has a cylindrical shape. The inside of the cylindrical main body 21 forms a gas flow path portion 24 through which the refrigerant gas flows. Further, a step portion 25 is formed on the inner peripheral portion of the cylindrical main body 21, and the cylindrical main body 21 and the punching plate 23 are placed on the step portion 25.

  A plurality of caulking portions 26 are formed at the end of the cylindrical main body 21 on the arrow X2 direction side in the drawing. After the cylindrical main body 21 and the punching plate 23 are placed on the step portion 25, the cylindrical main body 21 and the punching plate 23 are fixed to the cylindrical main body 21 by caulking the caulking portion 26 inward. At this time, in the partition members 20 </ b> A and 20 </ b> C, the punching plate 23 is disposed on the side facing the cool storage materials 17 and 18, and the metal mesh 22 is disposed outside the punching plate 23. In addition, about the partition member 20B which defines the cool storage materials 17 and 18, the arrangement | positioning position of the metal mesh 22 and the punching plate 23 is not specifically limited.

  The wire mesh 22 has a function of preventing the regenerator materials 17 and 18 from leaking out of the regenerator cylinder 12 in the partition members 20A and 20C. Further, the wire mesh 22 has a function of preventing the first cold storage material 17 and the second cold storage material 18 from being mixed (mixed) in the partition member 20B.

  Therefore, the mesh of the wire mesh 22 is set to be smaller than the particle size of the cold storage materials 17 and 18. Specifically, since the average particle diameter of the entire granular material of the first and second regenerator materials 17 and 18 is about 0.2 mm as described above, for example, a 180 mesh wire mesh is selected. .

  On the other hand, the punching plate 23 has a function of holding the wire mesh 22. Refrigerant gas flows in the regenerator cylinder 12 at a high speed, and the regenerator materials 17 and 18 are also moved and energized in the regenerator 10 as the displacer piston 80 reciprocates. Therefore, if it is going to regulate movement of the cool storage materials 17 and 18 only with the wire mesh 22, it is necessary to make the wire which constitutes the wire mesh 22 thick, and the average particle size of the cool storage materials 17 and 18 which are fine particles of about 0.2 mm. It becomes impossible to select a mesh that can prevent leakage.

  Therefore, in the present embodiment, a punching plate 23 is provided to reinforce the strength of the wire mesh 22. The punching plate 23 is made of a metal material such as stainless steel, and has a number of punch holes so as not to disturb the flow of the refrigerant gas.

  In the present embodiment, an example in which the wire mesh 22 and the punching plate 23 are used as the leakage preventing member is shown. However, the leakage preventing member is not limited to this, and the cold storage material 17 while maintaining the above-described strength. Other materials can be used as long as they can prevent 18 leaks.

  Here, when attaching the partition member 20 to the regenerator 10, attention is paid to the outer peripheral surface of the cylindrical main body 21 serving as a mounting surface to the regenerator cylinder 12. The partition member 20 according to the present embodiment has a configuration in which unevenness is formed by performing knurling on the outer peripheral surface of the cylindrical main body 21. Hereinafter, a portion where the knurling process is performed on the outer peripheral surface of the cylindrical main body 21 is referred to as a knurling unit 28.

  In the present embodiment, the knurled portion 28 is formed on the entire outer peripheral surface of the cylindrical main body 21. Moreover, the height of the convex part formed in the knurled part 28 is set to be larger than the manufacturing error of the regenerator cylinder 12 and the cylindrical main body 21 as described later.

  The knurled eye of the knurled portion 28 is a flat eye (straight pattern) shown in FIG. 6, a square eye (cross pattern) shown in FIGS. 7A and 7B, and a rhombus eye shown in FIGS. 8A and 8B. (Diamond pattern) may be used. It is also possible to adopt other knurled eyes.

  However, when a flat mesh (straight pattern) is used as the knurled mesh, the direction of the flat mesh (the direction indicated by the arrow R in FIG. 6) is the axial direction of the cylindrical main body 21 (shown by the arrows X1, X2 in FIGS. Direction). This is because the cool storage materials 17 and 18 may move in the direction of the arrow R when a flat mesh is used as the knurled mesh.

  Therefore, by configuring the flat direction R to be non-parallel to the axial direction of the cylindrical main body 21, leakage and mixing of the regenerator materials 17 and 18 can be effectively prevented. 7 and 8, the diagram indicated by (B) is an enlarged view of one knurled pattern constituting the knurled eye.

  By forming the knurled portion 28 on the outer peripheral surface of the cylindrical main body 21 as described above, it is possible to prevent the cool storage materials 17 and 18 from leaking between the knurled portion 28 and the inner peripheral surface of the regenerator cylinder 12. In addition, the cost of the partition member 20 (the regenerator 10) can be reduced. Hereinafter, this reason will be described.

  FIG. 9 shows a partition member 19 which is a reference example of the present embodiment. The partition member 19 has the same configuration as the partition member 20 except that the knurled portion 28 is not formed on the outer peripheral surface of the cylindrical main body 21. Therefore, in the partition member 19, the same code | symbol is attached | subjected about the same structure as the partition member 20. FIG.

  The partition member 19 has no knurled portion 28 (unevenness) formed on the outer periphery of the cylindrical main body 21. For this reason, when the partition member 19 is mounted inside the regenerator cylinder 12, the diameter (outer diameter) of the tubular main body 21 and the inner diameter of the regenerator cylinder 12 need to be matched with high accuracy. Specifically, since the average particle size of the entire granular material of the first and second regenerator materials 17 and 18 is about 0.2 mm as described above, the space between the regenerator tube 12 and the tubular body 21 is It is necessary to set smaller than this particle size.

  In order to realize this, it is necessary to process the regenerator cylinder 12 and the cylindrical main body 21 with high accuracy, which is troublesome and increases the manufacturing cost. As a method of avoiding this, a method of manufacturing a plurality of partition members 19 having different diameters (outer diameters) within an expected error range is conceivable.

  In this method, a partition member 19 that matches the inner diameter of the regenerator cylinder 12 is selected from a plurality of types of partition members 19 on the spot, and the selected partition member 19 is mounted in the regenerator cylinder 12. However, in this method, it is necessary to manufacture a plurality of partition members 19 having different diameters (outer diameters), and there is a problem that the manufacturing cost increases.

  On the other hand, in the partition member 20 according to the present embodiment, the knurled portion 28 having convex portions larger than the manufacturing error of the regenerator cylinder 12 and the cylindrical main body 21 is formed on the outer peripheral surface of the cylindrical main body 21. . In the present embodiment, the strength of the cylindrical main body 21 in which the knurled portion 28 is formed is configured to be higher than the strength of the inner wall of the cylindrical main body 21. Specifically, a material having a higher hardness than the material of the regenerator cylinder 12 is selected as the material of the cylindrical main body 21.

  Therefore, when the cylindrical main body 21 is mounted in the regenerator cylinder 12, the knurled portion 28 is in a state of being bitten into the inner wall of the regenerator cylinder 12. Thereby, the outer peripheral surface of the cylindrical main body 21 and the inner peripheral surface of the regenerator cylinder 12 can be in a state without a gap, and from between the outer peripheral surface of the cylindrical main body 21 and the inner peripheral surface of the regenerator cylinder 12. It is possible to reliably prevent the first and second regenerator materials 17 and 18 from leaking out.

  As described above, in the regenerator 10 using the partition member 20 according to the present embodiment, the outflow of the regenerator materials 17 and 18 is prevented over a long period of time, and the first regenerator material 17 and the second regenerator material 18 are used. Therefore, the cooling performance can be maintained high over a long period of time. In addition, unlike the partition member 19 described above, it is not necessary to manufacture a plurality of types of partition members 19, and the knurling process can easily adjust the height of the unevenness, so that the manufacturing cost can be kept low. Can do.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments described above, and various modifications can be made within the scope of the gist of the present invention described in the claims. Can be modified or changed.

  Specifically, the present invention can be used for, for example, a Stirling refrigerator or a pulse tube refrigerator in addition to the GM refrigerator.

  The displacer piston may be a two-stage displacer provided with two regenerators or a one-stage displacer provided with only one regenerator. It is also possible to connect three or more regenerators to form a three or more stage displacer piston.

  Moreover, in the above-described embodiment, an example in which unevenness is formed by performing knurling on the outer peripheral surface of the cylindrical main body 21 is shown. However, as long as the unevenness that surely bites into the regenerator cylinder, the unevenness is generated by other processing methods. May be formed (for example, sand blasting).

  Furthermore, in the present embodiment, the configuration in which the knurled portion 28 is formed on the outer periphery of the cylindrical main body 21 is shown, but the knurled portion may be formed on the inner peripheral surface of the regenerator cylinder 12. Furthermore, it is also possible to form knurled parts on both the inner circumference of the regenerator cylinder 12 and the outer circumference of the cylindrical main body 21.

DESCRIPTION OF SYMBOLS 10 Displacer 12 Regenerator cylinders 17 and 18 Regenerator material 20 Partition member 21 Cylindrical main body 22 Wire net 23 Punching plate 24 Gas flow path part 25 Step part 26 Caulking part 28 Knurling part 40 Refrigerating machine

Claims (7)

The regenerator material is filled with a regenerator material and is attached to a regenerator through which refrigerant gas passes, and is a partition member that prevents the regenerator material from leaking out of the regenerator,
A cylindrical body mounted on the regenerator cylinder;
A leakage preventing member provided on the cylindrical main body and preventing the cold storage material from leaking out of the cold storage;
And the partition member provided with the mounting part in which the unevenness | corrugation which bites into the inner wall of the said cool storage cylinder was provided in the mounting surface mounted to the said cool storage cylinder of the said cylindrical main body. The mounting part is
The partition member according to claim 1, wherein irregularities are formed by knurling the mounting surface. The mounting part is
Unevenness is formed by knurling the mounting surface,
And the knurled eyes formed by the said unevenness | corrugation are made into the non-parallel shape with respect to the axial direction of the said cylindrical main body, The partition member of Claim 1 or 2 characterized by the above-mentioned.   The partition member according to any one of claims 1 to 3, wherein the strength of the mounting portion is higher than the strength of the inner wall of the regenerator cylinder. The leakage preventing member is
The partition member according to any one of claims 1 to 4, wherein the partition member is configured by a wire mesh through which the cold storage material does not pass and a punching plate that suppresses deformation of the wire mesh. A regenerator cylinder through which the refrigerant gas passes;
A regenerator material filled in the regenerator cylinder;
It has a partition member as described in any one of Claims 1 thru | or 4, The regenerator characterized by the above-mentioned. A cylinder,
The regenerator according to claim 6, which is disposed in the cylinder so as to be reciprocally movable;
Drive means for reciprocating movement in the accumulator cylinder;
A regenerator type freezer comprising the above.

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