Refrigeration system having a variable speed compressor

Refrigeration system having a variable speed compressor

  • CN 104,676,941 A
  • Filed: 09/29/2010
  • Published: 06/03/2015
  • Est. Priority Date: 09/30/2009
  • Status: Active Application
First Claim
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1. a secondary cascade refrigeration system, comprising:

  • First refrigeration-grade, this first refrigeration-grade defines a first fluid loop for a kind of first cold-producing medium that circulates, and this first refrigeration-grade has first compressor, a condenser and is in this first fluid loop first expansion gear that fluid is communicated with;

    Second refrigeration-grade, this second refrigeration-grade defines a second fluid loop for a kind of second refrigerant that circulates, this second refrigeration-grade has second compressor, second expansion gear and is in this second fluid loop the evaporimeter that fluid is communicated with, and this second compressor is speed changeable compressor;

    A heat exchanger, this heat exchanger and this first and second fluid circuit be in fluid be communicated with in case between this first and second cold-producing medium heat-shift;

    A case room, this case room has an inner area and provides a door of the path entering this inner area;

    At least one controller, this at least one controller is is operatively connected on this first and second compressor to control their operation independently;

    And at least one item of the following;

    Is operatively be connected to a sensor on this at least one controller, this sensor be configured to sense this first or second refrigerant a blowdown presssure and produce to this at least one controller the signal that shows sensed pressure, this at least one controller is that performability is so that in response to this signal to change the speed of this second compressor;

    AndIs operatively be connected to a sensor on this at least one controller, this sensor is configured to sense an exhaust temperature of this first cold-producing medium and produces to this at least one controller the signal that shows sensed exhaust temperature, and this at least one controller is that performability is so that in response to this signal to change the speed of this second compressor.

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