JP2887022B2 - Cooler regenerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerator for a cooler used for a stirling cooler or the like.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIG.
The regenerator 34 used for a stirling cooler or the like is an important component that determines the cooling capacity. The regenerator 34
The heat storage body (hereinafter, referred to as the cold storage material 35) is basically enclosed in the cold storage container 36.
Solids such as lead, copper, stainless steel, and magnetic materials having a shape such as a wire mesh or a granular shape, and gases such as helium gas and nitrogen gas are used. When the cooler is in operation, the regenerator 34
Is that the refrigerant in the high temperature state flows in from the high temperature refrigerant inflow / outflow section 37 and turns into the low temperature state refrigerant in the low temperature refrigerant outflow / inflow section 38.
More outflow. Next, the low-temperature refrigerant flows in from the low-temperature refrigerant inflow / outflow section 38, becomes a high-temperature state refrigerant, and flows out from the high-temperature refrigerant inflow / outflow section 37. As described above, the regenerator 34 used in the cooler is configured such that the refrigerant in the high-temperature state and the refrigerant in the low-temperature state alternately pass through the regenerator 34 and repeat this operation to provide the refrigerant with a temperature difference. Make it effective. Here, the regenerator material 35 has a function of receiving and storing heat from the refrigerant when the high-temperature refrigerant passes through the regenerator 34, and conversely gives the stored heat to the refrigerant when the low-temperature refrigerant passes through the regenerator 34. I do.

When the cooler is operating, that is, when the high-temperature refrigerant and the low-temperature refrigerant alternately pass through the regenerator 34, the regenerator 34 keeps the temperature of the high-temperature refrigerant inflow / outflow section 37 and the low-temperature refrigerant outflow / inflow section 38 constant. Has enough heat capacity to keep
In addition, it is necessary that the heat transfer between the refrigerant and the cold storage material be good and that the flow path resistance in the flow direction of the refrigerant be small. Also,
Since the regenerator 34 has a constant high-temperature refrigerant outflow / inflow portion 37 temperature and a constant low-temperature refrigerant outflow / inflow portion 38 temperature, there is always a temperature difference, and the contact heat transfer between the regenerator materials 35 and the regenerator container 36
The heat conduction from the high-temperature refrigerant inflow / outflow portion 37 to the low-temperature refrigerant inflow / outflow portion 38 due to the heat conduction causes the difference in the temperature of the refrigerant to be reduced, thereby lowering the cooling capacity. Therefore, in order to suppress the heat intrusion, it is necessary that the thermal resistance in the flow direction of the refrigerant is large.

[0004] Japanese Patent Publication No. 3-16591 discloses a known example of suppressing heat intrusion caused by a temperature difference between a high-temperature refrigerant outflow / inflow portion temperature and a low-temperature refrigerant outflow / inflow portion temperature of a regenerator. JP-A-2-85652, JP-A-2-130355 and JP-A-2-309158 are mentioned. Here, Japanese Patent Publication No. Hei 3-16591 discloses that the temperature of the high-temperature refrigerant inflow / outflow portion of the regenerator is determined by using a regenerator formed by laminating the heat storage material of the wire netting and including the heat insulating material at appropriate intervals. A structure is described that suppresses heat intrusion due to contact heat transfer between a cold storage material and a cold storage material caused by a temperature difference between the temperature of the low-temperature refrigerant outlet and inlet. Japanese Patent Application Laid-Open No. 2-85652 discloses that a non-conductive material is coated on a regenerative material in order to enable freezing of SQUID and the like by a mechanical cooler. A structure is described in which generated induced electromotive current is confined in a regenerator to suppress adverse effects on SQUIDs and the like. Japanese Patent Application Laid-Open No. 2-130355 discloses that a regenerator is formed by pressing and fixing a granular regenerator material coated with a soft metal or resin, thereby suppressing the generation of fine powder of the regenerator material. It describes that a regenerator is manufactured to improve the reliability of the cooler. JP-A-2-309158 discloses that in a cooler using a pulverized magnetic material as a cold storage material, fine particles of the magnetic material generated during chip operation during the operation of the cooler come out of the cool storage device. Coating the surface of the pulverized magnetic material with another metal film suppresses the generation of fine powder from the magnetic material used as a cold storage material, since cooling performance is reduced and damage is caused. It states that the cooling capacity is prevented from being lowered or damaged.

[0005]

The heat intrusion caused by the temperature difference between the temperature of the high-temperature refrigerant inflow / outflow portion 37 and the temperature of the low-temperature refrigerant outflow / inflow portion 38 of the regenerator 34 is caused by the contact heat transfer between the regenerators 35 and the regenerator container. 36 due to heat conduction. Further, the heat intrusion due to the heat conduction of the regenerator container 36 directly passes through the regenerator container 36 and the high-temperature refrigerant inflow / outflow portion 37.
And the cold storage material 3
The heat stored in the cold storage container 5 is transferred by contact heat transfer.
6, which is categorized as those that pass through the regenerator vessel 36 and enter the low-temperature refrigerant inflow / outflow section 38 from the high-temperature refrigerant inflow / outflow section 37.

[0006] The above-mentioned prior arts (1) suppress heat intrusion caused by a temperature difference between a high-temperature refrigerant inflow / outflow portion temperature and a low-temperature refrigerant inflow / outlet portion temperature of a regenerator, that is, heat generated by contact heat transfer between regenerative materials. Suppressing intrusion, (2)
In a regenerator used in a stirling cooler or the like, a regenerator configured by laminating a wire mesh including a heat insulating material at an appropriate interval when laminating a regenerator material of a wire mesh is a regenerator container formed from a regenerator material. Contact heat transfer to the regenerator container is not enough to prevent heat
No consideration has been given to suppressing contact heat transfer from the cold storage material to the regenerator container to suppress heat intrusion occurring as heat conduction of the regenerator container.

SUMMARY OF THE INVENTION It is an object of the present invention to suppress heat penetration caused by contact heat transfer between regenerator materials, and to suppress heat transfer from a regenerator material to a regenerator container to generate heat as heat conduction of the regenerator container. An object of the present invention is to provide a regenerator for a cooler that can suppress intrusion.

[0008]

In order to achieve the above object, a regenerator of a cooler according to the present invention comprises a heat insulating material coated on the entire surface of a plate having a high thermal conductivity of a regenerator material sealed in the regenerator. The cold storage material is provided with a refrigerant passing means.

In addition, the regenerator material enclosed in the regenerator is coated with a substance having a heat insulating function, and is perpendicular to the direction of flow of the refrigerant on the plate having a high thermal conductivity of the regenerator material. A heat insulating material is coated on the surface, and a cooling medium passing means is provided on the heat insulating material.

[0010] The regenerator material enclosed in the regenerator is coated with a substance having a heat insulating effect, and the regenerator material covers the entire surface of the plate having high thermal conductivity.
In addition to this, a cooling medium passing means is provided therein, and a second regenerative material not coated with a heat insulating material is sandwiched between the regenerative materials.

Further, a heat insulating material is used for the inner surface of the container of the regenerator.

Further, a wire mesh cold storage material is used as the second cold storage material.

Further, the regenerative material enclosed in the regenerator has a structure in which granular regenerative materials coated with a heat insulating material and granular regenerative materials not coated with a heat insulating material are alternately arranged.

[0014]

A heat insulating material is coated on the entire surface of the plate having a high thermal conductivity of the cold storage material sealed in the inside of the cold storage device, and the cold storage material is provided with a passage means for the refrigerant. Contact heat transfer can be suppressed.

The regenerator material enclosed in the regenerator is coated with a substance having a heat insulating effect, and the regenerator material has a plate having a high thermal conductivity and a surface perpendicular to the flow direction of the refrigerant. Since the heat insulating material is coated and the cooling medium is provided with the heat insulating material, contact heat transfer between the cold storage materials can be suppressed.

[0016] The regenerator material enclosed in the regenerator is coated with a substance having a heat insulating effect, and the regenerator material coats the heat insulating material on the entire surface of the plate having high thermal conductivity. This is provided with a means for passing a refrigerant, and a second heat insulating material is not coated between the cold storage materials.
, The contact heat transfer between the cool storage materials can be suppressed, and the heat can be stored in the second cool storage material.

Since the heat insulating material is used for the inner surface of the container of the regenerator, it is possible to suppress the transfer of heat to the regenerator container by contact heat transfer. Further, heat conduction generated from the high-temperature refrigerant inflow / outflow section to the low-temperature refrigerant inflow / outflow section through the regenerator container can be suppressed.

[0018] Since the cold storage material of the wire mesh is used as the second cold storage material, heat can be stored in the cold storage material of the wire mesh.

Since the regenerative material enclosed in the regenerator is composed of a granular regenerative material coated with a heat insulating material and a granular regenerative material not coated with a heat insulating material, the contact heat between the regenerator materials is changed. Transmission can be suppressed, and heat can be stored in the cold storage material.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. After coating the entire surface of a thin disk 1 made of a material having high thermal conductivity with a heat insulating material 2, a large number of holes 3 are provided to form a cold storage material 4 coated with the heat insulating material 2. Here, for example, phosphor bronze is used for the thin disk 1 having a high thermal conductivity, and ceramics is used for the heat insulating material 2. These are stacked vertically in the direction of flow of the refrigerant in the regenerator container 5 to constitute the regenerator 8. Here, the regenerator container 5 is made as thin as possible and is made of stainless steel, resin material, ceramics which is a heat insulating material, or the like having low thermal conductivity. In this embodiment,
A thin disk 1 made of a material having high thermal conductivity
By using the cold storage material 4 formed by coating in the above, contact heat transfer between the cold storage materials 4 and heat conduction generated from the cold storage material 4 to the cold storage container 5 can be suppressed. Also,
Since the regenerator container 5 is made of a material having a small thickness and a low thermal conductivity or a heat insulating material, it is possible to suppress heat conduction generated from the high-temperature refrigerant inflow / outlet 6 to the low-temperature refrigerant inflow / outlet 7 through the regenerator 5. it can. Further, the disc 1 having high thermal conductivity and the refrigerant can directly transfer heat without being hindered by the heat insulating material by the refrigerant passage holes 3 provided in the regenerative material 4 in large numbers. The vessel 8 can have the required heat capacity. That is, they suppress heat intrusion caused by the temperature difference between the high-temperature refrigerant outflow / inflow section 6 temperature and the low-temperature refrigerant outflow / inflow section 7 temperature of the regenerator 8, and provide the necessary heat capacity to the regenerator, thereby lowering the cooling capacity of the cooler. Can be prevented.

A second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the wire mesh cold storage material 9 having a high thermal conductivity is used.
The regenerator 13 is constituted by using the regenerator material 4 coated with a heat insulating material on the entire surface used in the first embodiment. The present embodiment is characterized in that a wire mesh cold storage material 9 having a high thermal conductivity is laminated in a regenerator container 10 in a direction perpendicular to the flow direction of the refrigerant, and is sandwiched by the cold storage material 4 used in the first embodiment. And Here, the contact heat transfer between the wire mesh cold storage materials 9 cannot be suppressed, but by inserting the wire mesh cold storage material 9 with the cold storage material 4, the contact heat transfer of the cold storage material from the high temperature refrigerant inflow / outflow portion 11 to the low temperature refrigerant inflow / outflow portion 12 is caused. Heat penetration can be suppressed. Also,
By making the thickness of the regenerator container 10 as thin as possible and using a material having low thermal conductivity or a heat insulating material, the heat stored in the wire mesh regenerator 9 is prevented from being transmitted to the regenerator container 10 by contact heat transfer. In addition, heat conduction from the high-temperature refrigerant inflow / outflow portion 11 to the low-temperature refrigerant inflow / outflow portion 12 through the regenerator container 10 can be suppressed. The wire mesh cold storage material 9 can directly transfer heat with the refrigerant, and the cold storage material 4 can have the heat capacity required for the cold storage device 13 for the same reason as that shown in the first embodiment. That is, they suppress heat intrusion caused by the temperature difference between the high-temperature refrigerant inflow / outlet portion 11 temperature and the low-temperature refrigerant inflow / outlet portion 12 temperature of the regenerator 13 and provide the required heat capacity to the regenerator 13 to reduce the cooling capacity of the cooler. Drop can be prevented.

A third embodiment of the present invention will be described with reference to FIGS. A thin disk 14 made of a material having a high thermal conductivity is coated with a heat insulating material 15 on a surface perpendicular to the flow direction of the refrigerant, and a number of holes 16 are provided to provide a cold storage material 17 coated with the heat insulating material. To form Here, phosphor bronze is used for the thin disk 14 having a high thermal conductivity, and ceramics is used for the heat insulating material 15. This is stacked in the regenerator container 18 in a direction perpendicular to the flow direction of the refrigerant to constitute the regenerator 21. Here, the regenerator container 18 is made as thin as possible and made of stainless steel, resin material, or ceramics which is a heat insulating material having low thermal conductivity. In this embodiment, a cold storage material 1 formed by coating a thin disk 14 made of a material having a high thermal conductivity with a heat insulating material 15 on a surface perpendicular to the flow direction of the refrigerant.
By using 7, the contact heat transfer between the cold storage materials 17 can be suppressed. The regenerator container 18 has a small thickness,
Since a material having a low thermal conductivity or a heat insulating material is used, the heat stored in the cold storage material 17 can be suppressed from being transmitted to the cold storage container 18 by contact heat transfer, and the direct heat storage container 1
The heat conduction generated from the high-temperature refrigerant inflow / outflow portion 19 to the low-temperature refrigerant inflow / outflow portion 20 through the cooling medium 8 can be suppressed. Further, a large number of coolant passage holes 16 provided in the cold storage material 17 enable direct heat transfer between the disk 14 having a high thermal conductivity and the coolant without being hindered by the heat insulating material. The heat capacity required for the vessel 21 can be provided.
That is, these are the high-temperature refrigerant outflow / inflow portions 19 of the regenerator 21.
Heat intrusion caused by the temperature difference between the temperature and the temperature of the low-temperature refrigerant inflow / outflow portion 20 is suppressed, and the required heat capacity is given to the regenerator 21, so that the cooling capacity of the cooler can be prevented from lowering.

A fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, the regenerator 25 is composed of the wire mesh regenerator 9 having a high thermal conductivity and the regenerator 17 used in the third embodiment and having a surface perpendicular to the flow direction of the refrigerant coated with a heat insulating material. I do. Here, a wire mesh cold storage material 9 having a high thermal conductivity is stacked vertically in the regenerator container 22 in a direction perpendicular to the flow direction of the refrigerant, and the surface perpendicular to the flow direction of the refrigerant used in the third embodiment is insulated. It is characterized in that it is sandwiched by the cold storage material 17 coated in the above. Here, the contact heat transfer between the wire mesh cold storage material 9 cannot be suppressed, but since the wire mesh cold storage material 9 is sandwiched by the cold storage material 17, the high-temperature coolant outflow / inflow portion 23 to the low temperature coolant outflow / inflow portion 2
4, heat invasion due to contact heat transfer of the cold storage material can be suppressed. Further, the thickness of the regenerator container 22 is made as thin as possible,
By using a material having a low thermal conductivity or a heat insulating material, the heat stored in the wire mesh cold storage material 9 and the cold storage material 17 can be suppressed from being transmitted to the cold storage container 22 by contact heat transfer.
Also, the high-temperature refrigerant inflow / outflow portion 23 passes directly through the regenerator container 22.
The heat conduction generated from the air to the low-temperature refrigerant inflow / outflow portion 24 can also be suppressed. Further, the wire mesh cold storage material 9 can directly transfer heat with the refrigerant, and the cold storage material 4 can have the heat capacity required for the cold storage device 25 for the same reason as in the third embodiment.
That is, these are the high-temperature refrigerant inflow / outflow portions 23 of the regenerator 25.
Heat intrusion caused by the temperature difference between the temperature and the temperature of the low-temperature refrigerant inflow / outflow portion 24 is suppressed, and the required heat capacity is given to the regenerator 25, so that the cooling capacity of the cooler can be prevented from lowering.

A fifth embodiment of the present invention will be described with reference to FIGS. In this embodiment, a heat insulating material 28 is added to the granular cold storage material 26 having a high thermal conductivity and the granular cold storage material 27 having a high thermal conductivity.
The regenerator 33 is constituted by using the regenerative material 29 formed by applying the above coating. This is because a cold storage material 29 coated with a granular cold storage material 26 having a high thermal conductivity and a heat insulating material 28.
Are alternately sealed in the regenerator container 30. Thus, by enclosing the regenerator material 29 in the regenerator container 30, heat intrusion due to contact heat transfer between the regenerator materials from the high-temperature refrigerant inflow / outflow portion 31 to the low-temperature refrigerant inflow / outflow portion 32 can be suppressed. Further, since the regenerator container 30 is made of a material having a small thickness and a low thermal conductivity or a heat insulating material, it is possible to suppress the heat stored in the regenerator material 26 from being transmitted to the regenerator container 30 by contact heat transfer. In addition, direct regenerator container 30
From the high-temperature refrigerant inflow / outflow section 31 to the low-temperature refrigerant inflow / outflow section 3
2 can also be suppressed. Further, by adjusting the amount of the granular cold storage material 26 having a high thermal conductivity, the regenerator 33 can have a required heat capacity.
That is, these are the high-temperature refrigerant outflow / inflow portions 31 of the regenerator 33.
Heat intrusion caused by the temperature difference between the temperature and the temperature of the low-temperature refrigerant inflow / outflow portion 32 is suppressed, and the required heat capacity is given to the regenerator 33, so that the cooling capacity of the cooler can be prevented from lowering.

[0025]

As described above, according to the present invention,
By using a regenerator material coated with a heat insulating material, contact heat transfer between the regenerator materials and contact heat transfer from the regenerator material to the regenerator container are suppressed, and a low-temperature refrigerant inflow / outlet portion of the regenerator has a high-temperature refrigerant inflow / outflow portion. The heat intrusion generated to the surface can be reduced. Further, since the heat capacity required for the regenerator can be provided, a decrease in the cooling capacity of the cooler can be prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a cold storage material according to a first embodiment of the present invention, the entire surface of which is coated with a heat insulating material.

FIG. 2 is a configuration diagram of a regenerator using a regenerator material whose entire surface is coated with a heat insulating material.

FIG. 3 is a plan view of a wire mesh cold storage material according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a regenerator in which a wire mesh regenerative material is sandwiched by a regenerative material coated on the entire surface with a heat insulating material.

FIG. 5 is a configuration diagram of a cold storage material according to a third embodiment of the present invention in which a surface perpendicular to the flow direction of the refrigerant is coated with a heat insulating material.

FIG. 6 is a configuration diagram of a regenerator using a regenerative material whose surface perpendicular to the flow direction of the refrigerant is coated with a heat insulating material.

FIG. 7 is a configuration diagram of a regenerator according to a fourth embodiment of the present invention in which a wire mesh regenerative material is sandwiched by a regenerator material whose surface perpendicular to the flow direction of the refrigerant is coated with a heat insulating material.

FIG. 8 is a plan view of a granular cold storage material according to a fifth embodiment of the present invention.

FIG. 9 is a plan view of a granular cold storage material coated with a heat insulating material.

FIG. 10 shows a granular cold storage material coated with a heat insulating material and a core.
It is a block diagram of the regenerator in which the granular cold storage material which is not put is alternately enclosed.

FIG. 11 is a configuration diagram showing a conventional regenerator.

[Explanation of symbols]

1, 14 ... a thin disk with high thermal conductivity, 2, 15, 28 ...
Insulation material, 3, 16 ... Coolant passage hole, 4 ... Cold storage material coated on the whole surface with insulation material, 5, 10, 18, 22, 30,
36 ... regenerator container, 6, 11, 19, 23, 31, 37
... High-temperature refrigerant inflow / outflow section, 7, 12, 20, 24, 32, 3
8: low-temperature refrigerant inflow / outflow section, 8: regenerator using a regenerator material coated on the entire surface with a heat insulating material, 9: wire mesh regenerator material, 13 ...
A regenerator in which a wire mesh regenerator is sandwiched by a regenerator coated on the entire surface with a heat insulator, 17 ... a regenerator coated on a surface perpendicular to the flow direction of the refrigerant with a heat insulator, 21 ... a flow direction of the refrigerant A regenerator using a regenerator material whose vertical surface is coated with a heat insulating material; 25 a regenerator storing a wire mesh regenerator material with a regenerator material coated on a surface perpendicular to the flow direction of the refrigerant with a heat insulating material; 26, 27: granular cold storage material, 29: heat insulating material
33, a regenerator in which granular regenerative material coated with a heat insulating material and granular regenerative material not coated are alternately enclosed.

Continuing from the front page (72) Inventor Tamio Fukuda 502 Kandachicho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. (72) Inventor Tadashi Matsushita 2-1-1 Sengen, Tsukuba-shi, Ibaraki Inside the Center (72) Inventor Masao Furukawa 2-1-1, Sengen, Tsukuba, Ibaraki Pref. Japan Space Development Agency Tsukuba Space Center (56) References JP-A-3-158661 (JP, A) JP-A-1-88361 (JP, U) JP-A-3-124166 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F25B 9/00

Claims (7)

(57) [Claims] 1. A regenerator for a cooler, characterized in that a substance having a heat insulating function is coated on the entire surface of a regenerator material enclosed in the regenerator. 2. A cooling system, wherein a heat insulating material is coated on the entire surface of a plate having a high thermal conductivity of a cold storage material enclosed in a regenerator, and said cold storage material is provided with means for passing a refrigerant. Machine regenerator. 3. A regenerator material enclosed in a regenerator is coated with a substance having a heat insulating effect, and is perpendicular to the flow direction of the refrigerant on a plate having a high thermal conductivity of the regenerator material. A regenerator for a cooler, characterized in that a heat insulating material is coated on a surface and a cooling medium passing means is provided on the heat insulating material. 4. A regenerator material enclosed in a regenerator is coated with a substance having a heat-insulating action, wherein the regenerator material coats a heat-insulating material on the entire surface of a plate having high thermal conductivity. In addition to this, a cooling medium passing means is provided, and a second heat insulating material is not coated between the cold storage materials.
A regenerator for a cooler, wherein the regenerator material is sandwiched between the regenerators. 5. The regenerator of a cooler according to claim 1, wherein a heat insulating material is used for an inner surface of the container of the regenerator. 6. A regenerator for a cooler according to claim 4, wherein a wire mesh regenerator is used as said second regenerator. 7. A regenerative material enclosed in a regenerator is characterized by alternately disposing a granular regenerative material coated with a heat insulating material and a granular regenerative material not coated with a heat insulating material. Cooler regenerator.