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JP-2026074780-A - Cryogenic refrigerator compressor and cryogenic refrigerator compressor housing

JP2026074780AJP 2026074780 AJP2026074780 AJP 2026074780AJP-2026074780-A

Abstract

[Problem] To efficiently cool the compressor for a cryogenic refrigerator. [Solution] The compressor 12 for the cryogenic refrigerator 10 comprises a compressor housing 24 having an air intake port 50 on a surface different from the front surface 24a of the compressor housing 24, and an air intake port 52 for the air intake port 50 on the edge of the front surface 24a, and an airflow generator 29 disposed inside the compressor housing 24 that generates an airflow from the air intake port 52 into the compressor housing 24 through the air intake port 50. The compressor housing 24 may have an air intake port 50 on the bottom surface 24d of the compressor housing 24 facing the compressor mounting surface 26, and an air intake port 52 between the compressor mounting surface 26 and the lower edge of the front surface 24a. [Selection Diagram] Figure 1

Inventors

  • 鈴木 翔

Assignees

  • 住友重機械工業株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (13)

  1. A compressor housing having an air intake on a side different from the front of the compressor housing, and having an air intake port for the air intake on the edge of the front, A compressor for a cryogenic refrigerator, characterized by comprising an airflow generator disposed within the compressor housing and generating an airflow from the air intake through the air intake port into the compressor housing.
  2. The compressor housing is characterized in that it has the air intake port on the bottom surface of the compressor housing facing the compressor mounting surface, and the air intake port between the compressor mounting surface and the lower edge of the front surface, as described in claim 1.
  3. The compressor for a cryogenic refrigerator according to claim 2, characterized in that the compressor housing is provided with a guide on its bottom surface for guiding the airflow from the air intake to the air intake port.
  4. The cryogenic refrigerator compressor according to claim 3, characterized in that the guide constitutes part of a linear motion mechanism that movably supports the cryogenic refrigerator compressor with respect to the compressor mounting surface.
  5. The compressor for cryogenic refrigerator according to claim 1, characterized in that the compressor housing has an exhaust port for releasing exhaust air in a location different from the front and the other surfaces.
  6. The compressor for a cryogenic refrigerator according to claim 5, characterized in that the different surfaces of the compressor housing are configured to obstruct the inflow of exhaust air into the intake port.
  7. The compressor for cryogenic refrigerator according to claim 5, characterized in that the compressor housing has the exhaust port on the rear surface of the compressor housing.
  8. The cryogenic refrigerator compressor according to claim 5, characterized in that it comprises a transformer positioned on the outside of the compressor housing in close proximity to the exhaust port.
  9. The compressor for a cryogenic refrigerator according to claim 8, characterized in that the transformer has an exhaust inlet for taking in the exhaust air.
  10. The compressor further comprises compressor components disposed within the compressor housing that generate vibration and/or heat during operation, The compressor housing supports the compressor components and is provided with a support plate supported on the bottom surface of the compressor housing via an anti-vibration mount. The compressor for a cryogenic refrigerator according to any one of claims 1 to 9, characterized in that the vibration-damping mount is positioned on the outside of the support plate when viewed from above.
  11. The compressor housing is provided with a fixing member attached to the outer circumference of the support plate, and the vibration-damping mount is fixed to the fixing member, as described in claim 10.
  12. Compressor housing and The compressor housing comprises a compressor component that is arranged within the compressor housing and generates vibration and/or heat during operation, The compressor housing supports the compressor components and includes a support plate supported on the bottom surface of the compressor housing via an anti-vibration mount. The compressor for a cryogenic refrigerator is characterized in that the vibration-damping mount is positioned on the outside of the support plate when viewed from above.
  13. Front and It has an air intake and a surface different from the front surface, A compressor housing for a cryogenic refrigerator, characterized in that it has an air intake port for the aforementioned air intake port on the edge of the front surface.

Description

This invention relates to a compressor for cryogenic refrigerators and a compressor housing for cryogenic refrigerators. Cryogenic refrigerators can be used for cryogenic cooling of measuring elements in various measurement devices, such as superconducting single-photon detectors, gravitational wave detectors, and voltage standards. In this case, the cryogenic refrigerator comprises a cold head for cooling the measuring element and a compressor for supplying and discharging a refrigerant gas, such as helium, to the cold head. The heat absorbed by the cold head is dissipated through the compressor. Special table 2019-505751 publication This is a schematic diagram showing a cryogenic refrigerator according to an embodiment.This figure schematically shows the external appearance of the compressor unit of a cryogenic refrigerator according to an embodiment.This figure schematically shows the external appearance of the compressor unit of a cryogenic refrigerator according to an embodiment.This figure schematically shows the external appearance of the compressor unit of a cryogenic refrigerator according to an embodiment.This figure schematically shows the external appearance of the compressor unit of a cryogenic refrigerator according to an embodiment.This diagram schematically shows the inside of the compressor unit of a cryogenic refrigerator according to an embodiment.This diagram schematically shows the inside of the compressor unit of a cryogenic refrigerator according to an embodiment.This diagram schematically shows the inside of the compressor unit of a cryogenic refrigerator according to an embodiment. The embodiments for carrying out the present invention will be described in detail below with reference to the drawings. In the description and drawings, identical or equivalent components, members, and processes are denoted by the same reference numerals, and redundant explanations are omitted as appropriate. The scale and shape of the illustrated parts are set for convenience to facilitate explanation and are not to be interpreted restrictively unless otherwise specified. The embodiments are illustrative and do not limit the scope of the present invention in any way. Not all features or combinations thereof described in the embodiments are necessarily essential to the invention. Figure 1 is a schematic diagram showing a cryogenic refrigerator according to an embodiment. The cryogenic refrigerator 10 is used to provide cryogenic cooling to an object or medium. For example, the cryogenic refrigerator 10 may be used as a cooling source for a measuring device. The measuring device can be, for example, a superconducting single-photon detector, a gravitational wave detector, a voltage standard, or other measuring devices in various fields. The cryogenic refrigerator 10 comprises a compressor 12 and a cold head 14. The compressor 12 is configured to recover refrigerant gas from the cryogenic refrigerator 10 from the cold head 14, pressurize the recovered refrigerant gas, and supply it back to the cold head 14. The compressor 12 is also referred to as the compressor unit. The cold head 14, also referred to as the expander, has a room temperature section 14a and a low-temperature section 14b, also referred to as the cooling stage. The refrigerant gas, also referred to as the working gas, is typically helium gas, but other suitable gases may be used. The compressor 12 and the cold head 14 constitute the refrigeration cycle of the cryogenic refrigerator 10, thereby cooling the low-temperature section 14b to a desired cryogenic temperature. The low-temperature section 14b can cool objects to be cooled, such as measuring elements in measuring devices. The cryogenic refrigerator 10 is, for example, a single-stage or two-stage Gifford-McMahon (GM) refrigerator, but it may also be a pulse tube refrigerator, a Stirling refrigerator, or another type of cryogenic refrigerator. The cold head 14 has a different configuration depending on the type of cryogenic refrigerator 10, but the compressor 12 can be configured as described below, regardless of the type of cryogenic refrigerator 10. Generally, the pressure of the refrigerant gas supplied from the compressor 12 to the cold head 14, and the pressure of the refrigerant gas recovered from the cold head 14 to the compressor 12, are both considerably higher than atmospheric pressure and can be referred to as the first high pressure and the second high pressure, respectively. For convenience of explanation, the first high pressure and the second high pressure are also simply called high pressure and low pressure, respectively. Typically, the high pressure is, for example, 2 to 3 MPa. The low pressure is, for example, 0.5 to 1.5 MPa, and is approximately 0.8 MPa. The compressor 12 is an oil-lubricated compressor for cryogenic refrigerators and comprises a compressor body 16, a refrigerant gas line 18, and an oil circulation line 20. In Figure 1, for ease of understanding, the r