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CRYOGENIC REFRIGERATOR AND CONTROL METHOD THEREFOR

  • US 20100275616A1
  • Filed: 11/05/2008
  • Published: 11/04/2010
  • Est. Priority Date: 11/19/2007
  • Status: Abandoned Application
First Claim
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1. A cryogenic refrigerator which generates a cryogenic temperature by compressing a working gas in a closed loop and expanding the compressed working gas, the cryogenic refrigerator comprising:

  • a bypass line which allows a high-pressure portion and a low-pressure portion in the closed loop to communicate with each other;

    a gas storage tank which is located midway in the bypass line and has pressure regulation valves on the high-pressure side and the low-pressure side, respectively; and

    a pressure control unit which controls the pressure regulation valves,wherein the pressure control unit controls the pressure regulation valves so that the pressure in the gas storage tank is equal to the pressure in the closed loop at room temperature and in a stopped state and controls the pressure regulation valves so that the pressure in the high-pressure portion is equal to a predetermined pressure in an operating state in which a cryogenic temperature is generated.

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