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Humidity control for regulating compressor speed

  • US 5,129,234 A
  • Filed: 01/14/1991
  • Issued: 07/14/1992
  • Est. Priority Date: 01/14/1991
  • Status: Expired due to Term
First Claim
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1. A control for regulating humidity in an enclosure to be used in conjunction with an air processing system, including a thermostat, an air processor and a blower, for providing processed air to said enclosure;

  • said thermostat providing, under predetermined conditions, a first stage cooling demand signal and a second stage cooling demand signal;

    said air processor including a compressor operable in a cooling mode, in an ON cycle and an OFF cycle, and at a low compressor speed and a high compressor speed in response to said thermostat;

    comprising, in combination;

    sensor means for sensing actual relative humidity within said enclosure and providing a relative humidity signal;

    selector means for selecting a desired relative humidity level within said enclosure and providing a set point signal; and

    compressor control means, coupled and responsive to said thermostat, said sensor means and said selector means, for overriding said first stage cooling demand signal and effecting said high compressor speed in a predetermined ON cycle of said compressor whenever actual relative humidity within said enclosure exceeds said desired relative humidity level, said compressor control means including;

    adjustment means, coupled to said selector means, for receiving said set point signal and for responsively providing an adjusted signal corresponding to a relative humidity threshold exceeding said desired relative humidity by a predetermined increment first comparator means, coupled to said sensor means and said selector means, for receiving said relative humidity signal and said set point signal and for responsively providing a first comparator signal whenever actual relative humidity exceeds desired relative humidity level;

    second comparator means, coupled to said sensor means and said adjustment means, for receiving said relative humidity signal and said adjusted signal and for responsively providing a second comparator signal whenever actual relative humidity exceeds said relative humidity threshold; and

    override means, coupled to said thermostat, said first comparator means and said second comparator means, for receiving said first stage demand signal, said first comparator signal and said second comparator signal and for responsively effecting said high compressor speed.

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