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Automatic control apparatus for a heat pump system

  • US 4,333,316 A
  • Filed: 10/14/1980
  • Issued: 06/08/1982
  • Est. Priority Date: 10/14/1980
  • Status: Expired due to Term
First Claim
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1. In a heat pump system, automatic control apparatus for switching the heat pump system from a normal functional operating mode to a standby operating mode in which temperatures in the conditioned space are maintained within an expanded temperature range having predetermined upper and lower temperature limits, the control apparatus comprising:

  • means for receiving and storing user-selected volatile data representing a desired target temperature for the conditioned space and a desired functional operating mode for the heat pump system;

    means for supplying a data check code signal, the status of which indicates the validity or invalidity of the data signals emanating from the volatile data storage means;

    means repetitively responsive to the stored volatile data signals and to valid data check code signals for operating the heat pump system in the user-selected functional operating mode and for entering the heat pump system into the standby mode when a predetermined number of invalid data check code signals are repetitively sensed in sequence;

    and standby means responsive to an enter standby mode instruction to cause one or both of said predetermined upper and lower temperature limits of the expanded temperature range to be established to supersede the user-inserted target temperature and for operating the heat pump system to maintain the temperature of the conditioned space within said expanded temperature range.

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