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Modulated temperature control for environmental chamber

  • US 5,226,472 A
  • Filed: 11/15/1991
  • Issued: 07/13/1993
  • Est. Priority Date: 11/15/1991
  • Status: Expired due to Fees
First Claim
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1. Apparatus for controlling the air temperature of a served space which is equipped with a heat source and a cold source, said apparatus comprising:

  • temperature sensing means for sensing the temperature in the served space, comparator means for comparing the sensed temperature to a predetermined set point temperature and generating a control signal indicative of the difference between the two temperatures, and control means coupled to said comparator means and to the heat source and the cold source and responsive to only said control signal for controlling the operation of the heat source and the cold source in a push-pull manner such that the amount of cooling provided is inversely proportional to the amount of heating provided.

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