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Refrigeration system flow control expansion valve

  • US 5,715,704 A
  • Filed: 07/08/1996
  • Issued: 02/10/1998
  • Est. Priority Date: 07/08/1996
  • Status: Expired due to Term
First Claim
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1. In a refrigeration system having a compressor, evaporator, and condensor connected in series, an expansion valve connected between the evaporator and the condensor comprising:

  • a) a valve body having a valve inlet for accepting refrigerant and a valve outlet for delivering refrigerant through the valve body, said valve body including a metering head defining first and second passageways for fluid passing through the valve body;

    b) a valving element mounted for controlled movement within the valve body and including a valving element passageway which in combination with the first and second passageways conveys fluid through the valve body to the valve outlet; and

    c) a valve actuator mounted to the valve body for moving the valving element to a position blocking flow through one passageway of the first and second passageways while allowing fluid to flow through another of the first and second passageways and said valve element passageway to the outlet.

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