JPH09210483A - Cold storage type refrigerating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the refrigerating capacity by arranging a heat-unifying member which is provided with a gas flow passage to pass the gas and unifies the temperature of the passing gas in a cold storage device to unify the temperature distribution in the radial direction of the cold accumulator. SOLUTION: A spherical cold storage material 5b is filled in a cold storage device 4b in a second stage displacer 2b, two heat-unifying plates 21 as the heat-unifying member are provided in the gas flow direction with intervals therebetween, and a gas passage to pass the gas is provided on the heat-unifying plates. The helium gas flowing into the second stage cold storage device 4b is cooled by the cold storage material 5b, or cools the cold storage material 5b. Because the cold storage material 5b comprises spherical grains, the flow passage of the helium gas comes complicated and the temperature difference is generated in the radial direction of the cold storage device 4b. Because the heat-unifying plates 21 are provided in the cold storage device 4b, the helium gas with differential temperature passes through the gas flow passage in the heat-unifying plates 21 to unify the temperature by the heat-unifying plates 21 of excellent heat transfer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerator having a regenerator, and more particularly to a regenerator capable of improving heat exchange efficiency of the regenerator to improve refrigerating capacity.

[0002]

2. Description of the Related Art FIG. 21 is a block diagram showing a conventional regenerator of the cold storage type disclosed in Japanese Patent Laid-Open No. 3-129257, in which a two-stage GM refrigerator is shown. In the figure, the first stage cylinder 1a and the second stage cylinder 1b having a smaller diameter than the first stage are coaxially connected and integrated. First-stage and second-stage displacers 2a and 2b are housed in the cylinders 1a and 1b, respectively. The first-stage displacer 2a and the second-stage displacer 2b are connected to each other by a universal joint (not shown) so as to slide integrally in the cylinders 1a, 1b.

A first-stage expansion space 3a is formed between the first-stage cylinder 1a and the first-stage displacer 2a. A second-stage expansion space 3b is formed between the second-stage cylinder 1b and the second-stage displacer 2b. Inside each of the displacers 2a and 2b, first-stage and second-stage regenerators 4a and 4b are provided. The first stage regenerator 4a is
A copper wire mesh and a lead ball are used as the cold storage material 5a. The second-stage regenerator 4b uses, as the regenerator material 5b, a material having a composition of Ho-Er-Ru, which is one type of magnetic regenerator material.
Sealing materials 6a and 6b are provided in the cylinders 1a and 1b in order to prevent the helium gas from leaking from the displacers 2a and 2b.

A first stage 7a is arranged on the outer peripheral surface of the low temperature end of the first stage cylinder 1a. A second stage 7b is arranged on the outer peripheral surface of the second stage cylinder 1b at the low temperature end. The first-stage displacer 2a is provided with a gas passage 8a for gas flowing into and out of the first-stage regenerator 4a. The second-stage displacer 2b has a second-stage regenerator 4
A gas flow path 8b is provided to flow into and out of b. FIG.
2 is an enlarged view showing the second-stage displacer 2b in FIG. 21. Cooling material leakage preventing members 9 that prevent the cooling storage material 5b from flowing out are disposed at both ends of the cooling storage material 5b.

The first stage cylinder 1a is connected to a compressor 10 which compresses helium gas. Between the first-stage cylinder 1a and the compressor 10, an intake valve 11 that controls the timing of supplying high-pressure gas from the compressor 10, the regenerators 4a and 4b, and the expansion space 3a,
An exhaust valve 12 that controls the timing of discharging low-pressure gas from the compressor 3b to the compressor 10 is provided.
The first and second stage displacers 2a and 2b are
The driving force of the drive motor 13 is transmitted to reciprocate, and the intake valve 11 and the exhaust valve 12 are opened / closed in conjunction with the reciprocating motion.

Next, the operation will be described. First, with the first-stage and second-stage displacers 2a and 2b at the lowest end, the intake valve 11 opened, and the exhaust valve 12 closed, the high-pressure helium gas compressed by the compressor 10 flows in the first stage. It flows into the first-stage regenerator 4a from the passage 8a. This high-pressure gas is stored in the regenerator material 5 in the first-stage regenerator 4a.
is cooled to a predetermined temperature by a, and the first expansion space 3a
Flows into. Part of the high-pressure gas flowing into the first-stage expansion space 3a further flows into the second-stage regenerator 4b from the second-stage flow passage 8b, and is cooled to a predetermined temperature by the regenerator material 5b, and then the second-stage regenerator 5b. It flows into the expansion space 3b. As a result, the first-stage and second-stage expansion spaces 3a and 3b are in a high pressure state.

Next, the first and second stage displacers 2
a and 2b move upward, and accordingly, high-pressure helium gas is sequentially supplied to the first-stage and second-stage expansion spaces 3a and 3b. During this time, the intake and exhaust valves 11 and 12 do not move. At this time, the high-pressure helium gas is cooled to a predetermined temperature by the first-stage and second-stage regenerators 4a and 4b.

First-stage and second-stage displacers 2a, 2
When b reaches the uppermost end, the intake valve 11 is closed and the exhaust valve 12 is opened after a short delay. At this time, the high-pressure helium gas adiabatically expands to generate freezing. In addition, the first-stage and second-stage expansion spaces 3a, 3b
The helium gas present inside becomes low temperature and low pressure at each temperature level.

Next, when the first-stage and second-stage displacers 2a, 2b move downward, the low-temperature low-pressure helium gas cools the regenerator materials 5a, 5b in the first-stage and second-stage regenerators 4a, 4b. It This low-temperature low-pressure gas passes through the first-stage and second-stage flow paths 8a and 8b, and the exhaust valve 12
It is exhausted from and is returned to the compressor 10.

The exhaust valve 8 is closed and the intake valve 9 is opened in a state where the displacers 2a and 2b are moved to the lowermost ends and the volumes of the expansion spaces 3a and 3b of the first and second stages are minimized. It As a result, the high-pressure helium gas compressed by the compressor 10 is discharged, and the first stage and the second stage
The pressure in the stage expansion spaces 3a, 3b changes from low pressure to high pressure.
By repeating the above process as one cycle, the temperatures of the first and second stages 7a and 7b are cooled to 50K and 4.2K, respectively.

[0011]

In the conventional regenerative refrigerator having the above-described structure, the high-pressure gas passes from the gas flow paths 8a and 8b through the regenerators 4a and 4b to expand the expansion space 3
When flowing into a, 3b, or when returning from the expansion spaces 3a, 3b through the regenerators 4a, 4b to the compressor 10,
Since the thermal conductivity of the regenerators 4a and 4b in the radial direction is not so good, a temperature difference occurs in the radial direction of the regenerators 4a and 4b. Since helium gas has a lower viscous resistance when the temperature is lower, once the temperature difference occurs, the gas having the lower temperature is cooled by the regenerators 4a and 4a.
It becomes easier to flow through the low temperature portion b, and the temperature difference in the radial direction increases. In this way, when a temperature difference occurs in the radial directions of the regenerators 4a and 4b, and the helium gas having a low temperature and the helium gas having a high temperature flow through different portions in the regenerators 4a and 4b, There is a problem that the heat exchange efficiency of 4a and 4b is reduced, the heat loss is increased, and the refrigerating capacity of the refrigerator is reduced.

The present invention has been made to solve the above-mentioned problems, and it is possible to make the temperature distribution in the radial direction of the regenerator uniform, thereby improving the refrigerating capacity. The purpose is to obtain a cold storage refrigerator capable of

[0013]

According to a first aspect of the present invention, there is provided a regenerator having a cylinder, a displacer provided in the cylinder so as to reciprocate, and a displacer forming an expansion space in the cylinder, and the displacer. A cool storage type refrigerator provided with a regenerator for heat exchange of gas flowing into and out of an expansion space, wherein the regenerator has a gas flow path for allowing gas to pass therethrough. A heat equalizing member for equalizing the temperature of is provided.

In the regenerator of the second aspect, the regenerator is filled with the granular regenerator material, and the soaking member prevents the regenerator material from passing through the gas passage. The leak-proof member is joined.

In the regenerator of the third aspect, the cylinder and the displacer are provided in multiple stages, and the heat equalizing member is disposed in the regenerator in the displacer at the stage where the temperature is the lowest. There is something.

In the regenerator of the fourth aspect of the present invention, a plurality of heat equalizing members are arranged in the regenerator such that the heat equalizing members are closer to each other on the lower temperature side.

In the regenerator of the fifth aspect of the present invention, the heat equalizing member is arranged only on the low temperature side in the regenerator.

In the regenerator of the sixth aspect of the present invention, a plurality of heat equalizing members are stacked and arranged in the regenerator.

In the regenerator of the seventh aspect of the present invention, a spacer having a gas flow path is arranged between the heat equalizing members.

In the regenerator of the eighth aspect, the heat equalizing member is composed of a magnetic regenerator material.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a configuration diagram showing a cold storage refrigerator according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged view showing a second stage displacer of FIG. 1, and the same or corresponding parts to those of FIG. However, the description is omitted.

In the figure, the cooler 5b in the displacer at the stage where the temperature is the lowest, here the second stage displacer 4b, is filled with a spherical regenerator material 5b having an outer diameter of 0.5 mm, for example Ho _1.5 Er _1.5 Ru. In addition, the two heat equalizing plates 21 as the heat equalizing member are provided at intervals in the gas flow direction. As shown in FIGS. 3 and 4, the heat equalizing plate 21 is provided with a plurality of holes having a diameter of 1 mm, that is, gas passages 21 a, through which a gas passes. Also,
The soaking plate 21 is made of disc-shaped pure copper.

Felt mats 22 made of wool and serving as a cold storage material leak-preventing member are provided on both sides of each heat equalizing plate 21.
Are joined. As a result, the regenerator material 5b becomes the soaking plate 2
1 is prevented from entering the gas flow passage 21a.
Only gas passes through the inside of a. The felt mat 22 is also arranged at both ends of the regenerator 4b. Other configurations are similar to those of FIG.

Next, the operation will be described. The basic operation of the cold storage refrigerator as a whole is the same as that of the conventional example described above. Therefore, the helium gas flowing into the second stage regenerator 4b is cooled by the regenerator material 5b or cools the regenerator material 5b. At this time, since the regenerator material 5b is composed of spherical or sandy particles, the flow path of the helium gas becomes complicated, and a temperature difference occurs in the radial direction of the regenerator 4b. However, in the refrigerator of this example, the soaking plate 21 is provided in the regenerator 4b.
Is provided, and the helium gas having a temperature difference passes through the gas flow path 21 a of the heat equalizing plate 21. Then, the temperature of the helium gas is made uniform by the heat equalizing plate 21 having high heat conductivity.

As a result, the entire regenerator material 5b filled in the regenerator 4b cools the helium gas or is cooled to the helium gas, so that the operation efficiency of the regenerator 4b increases and the regenerator type refrigerator. The refrigerating capacity as a whole is improved.

For example, when the regenerator refrigerator is applied to a superconducting magnet or the like, a refrigerating capacity of 4.2K is required. In order to obtain a large refrigerating capacity at 4.2K, it is necessary to make the ultimate temperature as low as possible and make the cycle frequency as large as possible. FIG. 5 is a relationship diagram showing the relationship between the cycle frequency and the ultimate temperature in the regenerator and the conventional example of FIG. In the conventional cold storage refrigerator, the cycle frequency is 2.8K at 30 rpm, but the cycle frequency is 3
When it exceeds 3 rpm, the ultimate temperature rises, and at 45 rpm, it reaches 4.5K. In the first embodiment, 30 rp
The temperature reached at m is 2.6 K, which is lower than that of the conventional example, and even at 45 rpm, the temperature reaches 2.8 K, and the temperature hardly rises. From this figure as well, it can be seen that the refrigerating capacity of the regenerator is increased by applying the first embodiment.

Further, since the viscosity of helium gas becomes smaller as the temperature becomes lower, the temperature difference in the radial direction is more likely to occur in the cold storage type refrigerator at the lower temperature portion. Therefore, by disposing the soaking plate 21 in the low temperature portion, the effect of making the temperature of the helium gas uniform becomes high. In the first embodiment, since the heat equalizing plate 21 is arranged in the low temperature stage regenerator having a high need for soaking, that is, the second stage regenerator 4b, a highly efficient multi-stage regenerator type refrigerator is provided. can get.

In the above example, the felt mat 22 is shown as the regenerator material leak prevention member, but any other material may be used as long as it can prevent the regenerator material from leaking while allowing gas to flow.

In the above example, the two-stage regenerator is shown, but the number of stages may be one or three or more, and the heat equalizing member may be provided only in the lowest temperature stage. Alternatively, they may be provided in other stages. Furthermore, as the material of the heat equalizing member, a material having high heat conductivity is suitable, but the material is not limited to pure copper.

Embodiment 2 FIG. Next, FIG. 6 is a configuration diagram showing a main part of a cold storage refrigerator according to Embodiment 2 of the present invention. In the figure, a plurality of heat equalizing plates 23 as heat equalizing members made of pure aluminum are arranged in the second-stage regenerator 4b. These heat equalizing plates 23 are arranged closer to each other at the lower temperature end (lower end in the figure) of the regenerator 4b. Further, the shape of the heat equalizing plate 23 is similar to that shown in FIGS. 3 and 4, and both surfaces thereof are arranged with the felt mat 22 sandwiched therebetween. Other configurations are the same as those in the first embodiment.

As described above, by arranging the soaking plates 23 more densely at the lower temperature end where the temperature difference of the helium gas is likely to occur,
The temperature of the helium gas is effectively equalized, and the regenerator 4b
The efficiency is improved and the refrigerating capacity is improved.

Embodiment 3. FIG. 7 is a configuration diagram showing a main part of a cold storage refrigerator according to Embodiment 3 of the present invention. In this example, a soaking plate 21 made of pure copper similar to that of the first embodiment is used.
However, only one is disposed near the low temperature end in the regenerator 4b. Other configurations are the same as those in the first embodiment.

As described above, by setting the number of the heat equalizing plates 21 to 1, the ineffective volume in the regenerator 4b can be reduced to the necessary minimum amount, and the regenerator material 5b is filled more than in the first and second embodiments. Since the heat equalizing plate 21 is disposed in the vicinity of the low temperature end where the heat equalizing effect is high, the temperature of the helium gas can be effectively equalized.

Embodiment 4 Next, FIG. 8 is a plan view showing a heat equalizing member according to Embodiment 4 of the present invention, and FIG. 9 is a sectional view of FIG. In the figure, a plurality of heat equalizing members 24 made of pure copper or pure aluminum are formed in a U-shape in cross section and overlap each other. Each heat equalizing member 24 is provided with a gas passage 24a for passing helium gas and a spacer portion 24b extending in the axial direction of the regenerator. At the end of the laminated body of the heat equalizing member 24, a disc-shaped heat equalizing plate 21 as shown in FIGS. 3 and 4 is arranged. Such a laminated body of the heat equalizing member 24 and the heat equalizing plate 21 is arranged in the regenerator as described in each of the above embodiments.

Next, the operation will be described. The helium gas that has flowed into the first heat equalizing member 24 having a U-shaped cross section has its temperature uniformed in the radial direction of the regenerator and flows into the next heat equalizing member 24. At this time, since a space is formed by the spacer portions 24b between the adjacent heat equalizing members 24, the helium gas can freely move around. Therefore, even if the position of the gas flow path 24a of the next heat equalizing member 24 is deviated from the position of the previous one, the gas can flow in regardless. By repeating this process, the gas temperature in the radial direction of the regenerator can be made sufficiently uniform.

As described above, the temperature of the helium gas is further homogenized by providing the plurality of heat equalizing members 24 in an overlapping manner. Further, since the heat equalizing member 24 is formed in a U-shaped cross section and the spacer portion 24b is provided, a space in which gas can freely move is formed between the adjacent heat equalizing members 24, and the gas flow path 24
The heat equalizing member 24 can be stacked without worrying about the position of
Easy to assemble. Further, by disposing the spacer between the heat equalizing members, the temperature in the radial direction of the regenerator can be made uniform while suppressing the heat conduction in the axial direction of the regenerator.

Embodiment 5 10 is a sectional view of a heat equalizing member according to Embodiment 5 of the present invention. As shown in the drawing, even if the heat equalizing member 25 having an I-shaped cross section having the spacer portions 25a extending to both sides in the axial direction of the regenerator is used, a space is generated between the heat equalizing members 25. An effect similar to that of 4 can be obtained.

Embodiment 6 FIG. Next, FIG. 11 is a configuration diagram showing a main part of a cold-storage refrigerator according to Embodiment 6 of the present invention. The heat equalizing member 26 in this example is configured by stacking several meshes made of copper. The mesh opening is about 1 mm, and the regenerator material 5b has an outer diameter of 0.5 m.
m is spherical. Therefore, the felt mats 21 are arranged on both sides of the heat equalizing member 26 so that the regenerator material 5b does not pass through the mesh.

The helium gas that has passed through the soaking member 26 made of mesh is soaked by the mesh. By superimposing a plurality of meshes, the radial temperature of the regenerator can be made uniform while suppressing heat conduction in the axial direction of the regenerator 4b. Therefore, the regenerator material 5b of the entire regenerator 4b is used for cooling the gas or being cooled to the gas, the efficiency of the regenerator 4b is improved, and the refrigerating capacity is further improved.

Embodiment 7 FIG. 12 is a side view showing a laminated state of a heat equalizing member according to Embodiment 7 of the present invention.
In this example, a plurality of heat equalizing plates 21 similar to those shown in FIG. 3 and FIG. 4 are laminated via a spacer 27. As the spacer 27, a stack of wire nets is used.

With this structure, as compared with the case where a space is interposed as shown in FIGS. 9 and 10, the ineffective volume is reduced and the processing flow rate is reduced, so that a more efficient cold storage type refrigerator can be obtained.

Embodiment 8 FIG. Next, FIG. 13 is a configuration diagram showing a main part of a cold storage type refrigerator according to Embodiment 8 of the present invention.
14 is a plan view showing the heat equalizing plate of FIG. 13, and FIG.
FIG. In the figure, a heat equalizing plate 31 as a heat equalizing member having a gas flow path 31a is made of a magnetic cold storage material. As the magnetic regenerator material, a material having a large thermal conductivity obtained by precipitating a metal phase in an intermetallic compound phase is preferable, and a material having a specific heat characteristic close to that of the regenerator material and a large specific heat is desirable. Other configurations are the same as those in the first embodiment.

In the regenerator 4b thus configured, when the gas flows through the heat equalizing plate 31, heat is transferred in the cross-sectional direction and the temperature distribution is made uniform. Moreover, since the soaking plate 31 has a large specific heat, the energy of the gas can be better regenerated. That is, since the heat equalizing plate 31 itself has the effect of the regenerator material 5b, the same effect as that of the regenerator material 5b in the regenerator 4b can be expected, and the efficiency of the regenerator 4b can be improved. Also, if the heat equalizing plate 31 is installed near the low temperature end in the regenerator 4b, the temperature of the gas flowing in and out of the expansion space 3b (FIG. 1) can be made uniform, so the vibration width of the temperature of the stage 7b (FIG. 1) can be increased. There is also an effect that the object to be cooled can be cooled stably by reducing

Embodiment 9 Next, FIG. 16 is a side view showing a heat equalizing member according to Embodiment 9 of the present invention. In the figure, the soaking block 32 is formed by stacking first and second soaking plates 33, 34 as a soaking member and a spacer 35. As shown in FIG. 17, the first heat equalizing plate 33 is provided with a plurality of arcuate holes 33a so as to form a heat transfer path in the circumferential direction. Spacer 3
Reference numeral 5 is a wire mesh like that shown in FIG. Further, the second heat equalizing plate 34 is provided with a plurality of notches radially so as to form a heat transfer path in the radial direction.

By mounting the above-structured regenerator on the regenerator, the heat transfer paths in the circumferential and radial directions in the cross section are rationally formed to promote uniform heat distribution.

Embodiment 10 FIG. The soaking block 32
For example, as shown in FIG. 20, they may be stacked in two stages with a spacer 35 interposed therebetween, and the soaking effect can be further improved. Further, the soaking block 32 may be laminated in multiple stages.

[0047]

As described above, the regenerator of the first aspect of the present invention has the regenerator having the gas flow passage for allowing the gas to pass therethrough and uniformizing the temperature of the passing gas. Since it is arranged inside, the temperature distribution in the radial direction of the regenerator can be made uniform, and the refrigerating capacity can be improved.

In the regenerator of the second aspect of the present invention, the regenerator is filled with the granular regenerator material, and the soaking member leaks the regenerator material for preventing the regenerator material from passing through the gas passage. Since the stop member is joined, only the gas flows in the gas flow path, so that the soaking effect can be improved.

In the regenerator of the third aspect of the present invention, the cylinder and the displacer are provided in multiple stages, and the heat equalizing member is disposed in the regenerator in the displacer at the stage where the temperature is lowest. Therefore, the temperature of the gas is effectively equalized, the efficiency of the regenerator is increased, and the refrigerating capacity is improved.

In the regenerator of the fourth aspect of the present invention, since the plurality of heat equalizing members are arranged in the regenerator so that they are closer to each other on the lower temperature side, the gas temperature is effectively equalized. To be done.

In the regenerator of the fifth aspect of the present invention, since the heat equalizing member is disposed only on the low temperature side in the regenerator, the gas temperature is effectively equalized and the regenerator material is Is fully filled.

In the cold-storage refrigerator of the sixth aspect of the present invention, a plurality of heat equalizing members are arranged in the regenerator so that the temperature of the gas can be made sufficiently uniform.

In the cold-storage refrigerator of the seventh aspect of the present invention, since the spacer having the gas flow path is arranged between the heat equalizing members, heat conduction in the axial direction of the regenerator is suppressed and the assembly is easy. Can be

In the regenerator of the eighth aspect of the present invention, since the heat equalizing member is composed of the magnetic cold regenerator material, the heat equalizing member acts as the regenerator material and the efficiency of the regenerator is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a cold storage refrigerator according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged view showing the second-stage displacer of FIG.

FIG. 3 is a plan view showing the heat equalizing plate of FIG.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a relationship diagram showing the relationship between the cycle frequency and the ultimate temperature in the cold storage refrigerator of FIG. 1 and the conventional example.

FIG. 6 is a configuration diagram showing a main part of a cold storage type refrigerator according to Embodiment 2 of the present invention.

FIG. 7 is a configuration diagram showing a main part of a cold storage refrigerator according to Embodiment 3 of the present invention.

FIG. 8 is a plan view showing a heat equalizing member according to Embodiment 4 of the present invention.

FIG. 9 is a sectional view of FIG.

FIG. 10 is a sectional view of a heat equalizing member according to a fifth embodiment of the present invention.

FIG. 11 is a configuration diagram showing a main part of a cold storage refrigerator according to Embodiment 6 of the present invention.

FIG. 12 is a side view showing a laminated state of a heat equalizing member according to a seventh embodiment of the present invention.

FIG. 13 is a configuration diagram showing a main part of a cold storage type refrigerator according to Embodiment 8 of the present invention.

FIG. 14 is a plan view showing the heat equalizing plate of FIG.

FIG. 15 is a side view of FIG.

FIG. 16 is a side view showing a heat equalizing member according to Embodiment 9 of the present invention.

FIG. 17 is a plan view showing a first heat equalizing plate of FIG.

18 is a plan view showing the spacer of FIG. 16. FIG.

FIG. 19 is a plan view showing a second heat equalizing plate of FIG. 16.

FIG. 20 is a perspective view showing Embodiment 10 of the present invention.

FIG. 21 is a configuration diagram showing an example of a conventional cold storage refrigerator.

22 is an enlarged view showing the second-stage displacer of FIG. 21. FIG.

[Explanation of symbols]

1a 1st stage cylinder, 1b 2nd stage cylinder, 2a
1st stage displacer, 2b 2nd stage displacer,
3a 1st expansion space, 3b 2nd expansion space, 4a
First-stage regenerator, 4b Second-stage regenerator, 5a, 5b Regenerator material 21, 23, 31 Uniform plate (uniform member), 21a,
24a gas flow path, 22 felt mat (cooling material leakage prevention member), 24, 25, 26 soaking member, 24b, 2
5a spacer part, 27, 35 spacer, 33 1st
Soaking plate (heating member), 34 second soaking plate (heating member).

Claims (8)

[Claims] 1. A cylinder, a displacer that is reciprocally provided in the cylinder and forms an expansion space in the cylinder, and a cold storage that is provided in the displacer and exchanges heat between gas flowing into and out of the expansion space. And a heat equalizing member for equalizing the temperature of the passing gas is provided in the regenerator having a gas flow path for passing the gas. A cool storage refrigerator characterized by being installed. 2. A granular regenerator material is filled in the regenerator, and a regenerator material leak prevention member for preventing the regenerator material from passing through the gas flow passage is joined to the heat equalizing member. The cold-storage refrigerator according to claim 1, wherein 3. The cylinder and the displacer are provided in multiple stages, and the heat equalizing member is arranged in the regenerator in the displacer at the stage where the temperature becomes the lowest. Item 2. The cold storage refrigerator according to Item 2. 4. The cold storage type refrigerating machine according to claim 1, wherein the plurality of heat equalizing members are arranged in the cold regenerator so that the cold soaking members are closer to each other on a lower temperature side. Machine. 5. The heat equalizing member is arranged only on the low temperature side in the regenerator.
The cold storage refrigerator according to any one of 1. 6. The heat equalizing member is arranged in the regenerator by stacking a plurality of heat equalizing members.
The cold storage refrigerator according to any one of 1. 7. The cold storage refrigerator according to claim 6, wherein a spacer having a gas flow path is provided between the heat equalizing members. 8. The regenerator according to any one of claims 1 to 7, wherein the heat equalizing member is made of a magnetic regenerator material.