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Control apparatus for warm up cycle of air distribution system

  • US 4,073,433 A
  • Filed: 07/22/1976
  • Issued: 02/14/1978
  • Est. Priority Date: 07/22/1976
  • Status: Expired due to Term
First Claim
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1. An apparatus for controlling the ambient temperature in an enclosed area by regulating the flow of variable-pressure, conditioned air into said enclosed area, said apparatus comprising:

  • pressure regulator means having a pressure chamber for converting a portion of said variable pressure air to substantially constant pressure air provided in said pressure chamber;

    signal generating communicating with said pressure chamber means for generating a pressure signal indicative of said ambient temperature, and including means for sensing said ambient temperature;

    an air volume controller for metering said variable-pressure, conditioned air to said enclosed area, said pressure signal acting directly on said air controller; and

    overriding means interacting with said pressure regulator means for overriding said signal generating means by reducing the pressure in said pressure chamber to a sufficiently low level so that said pressure signal is at a minimum value regardless of the ambient temperature, whereby said controller provides maximum flow of variable pressure air to said area independently of said ambient temperature sensing means, said overriding means being activated upon the introduction of variable pressure air having a temperature substantially different from that normally used.

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