×

Economizer comfort index control

  • US 4,271,898 A
  • Filed: 05/07/1979
  • Issued: 06/09/1981
  • Est. Priority Date: 06/27/1977
  • Status: Expired due to Term
First Claim
Patent Images

1. In a home type heating and cooling system having a blower motor with at least two speeds, a common terminal of said blower motor being connected to a first side of a line voltage, stepped-down transformer means for reducing said line voltage to thermostat control means which includes a thermostat selector switch operatively connected to a secondary winding of said stepped-down transformer, a thermostat operatively connected to said thermostat selector switch to indicate if heating or cooling is desired, a fan selector switch having automatic and ON positions and being connected to said secondary winding, contactor relay means energized by said secondary winding via said thermostat and said thermostat selector switch if both call for cooling thereby connecting a compressor means and condenser fan means to said line voltage, heating control means connected to said thermostat selector switch to operate furnace means for heating if said thermostat and said thermostat selector switch call for heating, evaporator fan relay means connected to said fan selector switch and said secondary winding, the improvement comprising:

  • economizer control relay coil means connected to said secondary winding and said thermostat for energization if said thermostat and said thermostat selector switch both call for cooling, said economizer control relay coil means switching said blower motor from low speed to high speed if said fan selector switch is in said ON position, andmeans in combination with said economizer control relay coil to control relative humidity in a conditioned air space.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×