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Motor compressor control

  • US 3,913,342 A
  • Filed: 07/01/1974
  • Issued: 10/21/1975
  • Est. Priority Date: 07/01/1974
  • Status: Expired due to Term
First Claim
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1. In a refrigeration unit including a motor compressor unit enclosed within a shell, said motor including a start winding, the improvement comprising:

  • a temperature responsive resistance element connected in series with the start winding of the motor, the resistance of said responsive element substantially increasing as a function of its temperature, the temperature thereof being increased by the flow of current therethrough, said responsive element being disposed within the shell enclosing said motor compressor unit, refrigerant gas contained within said shell passing in heat transfer relation with said responsive element, the refrigerant gas removing heat from said responsive element when the flow of current thereto is interrupted due to the deenergization of the motor whereby the responsive element is rapidly cooled to place the element in a state to permit the flow of current therethrough to said start winding when the motor is reenergized.

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