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Refrigerant cycle device with ejector

  • US 20080041079A1
  • Filed: 06/21/2007
  • Published: 02/21/2008
  • Est. Priority Date: 06/26/2006
  • Status: Abandoned Application
First Claim
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1. A refrigerant cycle device comprising:

  • a compressor that sucks in and compresses refrigerant;

    a radiator located to cool high-pressure hot gas refrigerant discharged from the compressor;

    an ejector that has a nozzle section for decompressing and expanding refrigerant downstream of the radiator, a refrigerant suction port for sucking in refrigerant by a high-speed flow of refrigerant jetted from the nozzle section, and a pressurizing section for mixing and pressurizing the refrigerant jetted at high speed and the refrigerant sucked through the refrigerant suction port;

    a first evaporator for evaporating refrigerant flowing out of the ejector;

    a first passage portion for guiding refrigerant to the refrigerant suction port;

    a throttle unit that is located in the first passage portion and decompresses the refrigerant flowing in the first passage portion;

    a second evaporator that is located in the first passage portion downstream of the throttle unit in a refrigerant flow to evaporate refrigerant;

    a bypass passage portion for guiding the hot gas refrigerant discharged from the compressor into the second evaporator;

    a bypass opening and closing unit that is provided in the bypass passage portion to open and close the bypass passage portion, the bypass opening and closing unit having a throttling open degree when being opened;

    a second passage portion that is branched from the bypass passage portion downstream of the bypass opening and closing unit in a refrigerant flow, wherein the hot gas refrigerant in the bypass passage portion flows to the first evaporator through the second passage portion; and

    a first flow control unit that is provided in the second passage portion to prevent a flow of refrigerant from a side of the first evaporator to a side of the second evaporator through the second passage portion.

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