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REFRIGERANT FEED CONTROL AND SYSTEM

  • US 3,741,242 A
  • Filed: 12/10/1971
  • Issued: 06/26/1973
  • Est. Priority Date: 12/10/1971
  • Status: Expired due to Term
First Claim
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1. A liquid refrigerant feed control comprising:

  • a housing having an inlet for the feed line and an outlet to an evaporator for a liquid refrigerant and providing cylinder means therebetween having a lateral outlet opening defining a valve port facing the outlet;

    piston means exposed at one end to inlet pressure slidably mounted in said cylinder means to extend beyond said outlet opening at its other end and having a conduit throughout its length centrally discharging essentially towards a wall of the housing through the center of said valve port;

    fixed orifice means connected in series with and controlling flow through the conduit;

    valve means carried by said piston means adjacent to said outlet including radial openings communicating with said conduit and movable by said piston means in a direction transversely to the plane of said port to coact with said valve port and vary the flow opening of the valve with movement of said piston means; and

    means urging said piston means to establish a low pressure differential across the orifice including a resiliently operating element exerting a force upon the piston means in the valve opening direction.

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