Regenerative refrigerator

Patent metadata

Field	Value
Publication number	US-9423160-B2
Application number	US-201313855087-A
Country	US
Kind code	B2
Filing date	Apr 2, 2013
Priority date	Apr 4, 2012
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A regenerative refrigerator includes an expander which includes a regenerator including a regenerative material and an expansion space for expanding a refrigerant gas flowing in the regenerator, the regenerator being configured such that a temperature profile at a predetermined temperature range in the regenerator is selectively higher than a case when lead is used as the regenerative material.

First claim

What is claimed is:

1. A regenerative refrigerator comprising:
an expander which includes a regenerator including a regenerative material and an expansion space for expanding a refrigerant gas flowing in the regenerator,
the regenerator being configured such that a temperature profile at a predetermined temperature range in the regenerator is selectively higher than a reference case in which lead is used as the regenerative material.

2. A regenerative refrigerator comprising:
an expander which includes a regenerator including a regenerative material and an expansion space for expanding a refrigerant gas flowing in the regenerator; and
a temperature rising member which selectively raises a temperature profile at a predetermined temperature range in the regenerator,
wherein the temperature rising member is a heat transfer member composed of a material having a coefficient of thermal conductivity larger than that of the regenerative material.

3. The regenerative refrigerator according to claim 2 ,
wherein the heat transfer member is provided inside the regenerator.

4. The regenerative refrigerator according to claim 3 ,
wherein the heat transfer member is continuously or discretely provided in an axial direction of the expander.

5. The regenerative refrigerator according to claim 2 ,
wherein the heat transfer member is formed to surround the regenerative material.

6. The regenerative refrigerator according to claim 2 ,
wherein the heat transfer member is provided to increase the temperature profile at the temperature range in which the specific heat capacity of the refrigerant gas becomes a peak in the regenerator.

7. The regenerative refrigerator according to claim 2 ,
wherein the regenerator includes a high temperature side area including a first regenerative material composed of a non-magnetic material and a lower temperature side area including a second regenerative material composed of a magnetic material, and
the heat transfer member is provided in the high temperature side area.

8. The regenerative refrigerator according to claim 2 ,
wherein the heat transfer member is made of copper, aluminum, bismuth or the alloy thereof.

9. A regenerative refrigerator comprising:
an expander which includes a regenerator including a regenerative material and an expansion space for expanding a refrigerant gas flowing in the regenerator; and
a temperature rising member which selectively raises a temperature profile at a predetermined temperature range in the regenerator,
wherein the regenerative material includes one or more materials selected from a group including lead, bismuth, tin, silver and antimony.

10. A regenerative refrigerator comprising:
an expander which includes a regenerator including a regenerative material and an expansion space for expanding a refrigerant gas flowing in the regenerator; and
a temperature rising member which selectively raises a temperature profile at a predetermined temperature range in the regenerator,
wherein the temperature rising member is a heat transfer member which is provided outside the expander and connecting two positions whose temperatures are different from each other in a heat exchangeable manner.

11. The regenerative refrigerator according to claim 10 ,
wherein a low temperature end and a high temperature end of the heat transfer member are connected to different positions in an axial direction of the expander.

12. The regenerative refrigerator according to claim 10 ,
wherein a low temperature end of the heat transfer member is connected to an outer peripheral of the expander.

13. The regenerative refrigerator according to claim 10 ,
wherein the heat transfer member is provided to increase the temperature profile at the temperature range in which the specific heat capacity of the refrigerant gas becomes a peak in the regenerator.

14. The regenerative refrigerator according to claim 10 ,
wherein the regenerator includes a high temperature side area including a first regenerative material composed of a non-magnetic material and a lower temperature side area including a second regenerative material composed of a magnetic material, and
a low temperature end of the heat transfer member is connected to an outer peripheral of the expander at the high temperature side area.

15. A regenerative refrigerator comprising:
an expander which includes
a regenerator including a first regenerative material whose specific heat capacity is smaller than that of lead within a range more than or equal to 5K and less than or equal to 20K, and a second regenerative material provided at a lower temperature side than the first regenerative material and composed of a material different from the first regenerative material, and
an expansion space for expanding a refrigerant gas flowing in the regenerator,

wherein the position of an interface between the first regenerative material and the second regenerative material is configured to be within a range more than or equal to 5K and less than or equal to 20K in the regenerator.

16. The regenerative refrigerator according to claim 15 ,
wherein a separation plate for separating the first regenerative material and the second regenerative material is provided at the interface in the regenerator.

17. The regenerative refrigerator according to claim 15 ,
wherein the position of the interface between the first regenerative material and the second regenerative material is configured to be within a range more than or equal to 5K and less than or equal to 8K in the regenerator.

18. The regenerative refrigerator according to claim 15 ,
wherein the first regenerative material is selected from one or more materials selected from a group including bismuth, tin, silver and antimony.

19. The regenerative refrigerator according to claim 1 ,
wherein the regenerator is configured such that a temperature profile at temperature ranges other than the predetermined temperature range in the regenerator is the same as the reference case.

20. The regenerative refrigerator according to claim 1 ,
wherein the regenerative material is selected from one or more materials selected from a group including bismuth, tin, silver and antimony.

Assignees

• Sumitomo Heavy Industries

Inventors

• Xu Mingyao

Classifications

• F25B9/10

  with several cooling stages · CPC title

• F25B9/145

  pulse-tube cycle · CPC title

• F25B9/14 Primary

  characterised by the cycle used, e.g. Stirling cycle · CPC title