Temperature and pressure actuated capacity control system...

Details Temperature and pressure actuated capacity control system... Temperature and pressure actuated capacity control system...

F - Mech Eng,Light,Heat,Weapons

24

F

341/28

F24F 11/00 (2006.01) F25B 49/02 (2006.01) G05D 23/19 (2006.01)

Patent

CA 1233215

23 TEMPERATURE AND PRESSURE ACTUATED CAPACITY CONTROL SYSTEM FOR AIR CONDITIONING SYSTEM ABSTRACT OF THE DISCLOSURE An air conditioning control system, for use with an air conditioning system having a variable-capacity compressor, varies the compressor loading in accor- dance with evaporator pressure at return air tempera- tures above an upper set point and fixes the com- pressor loading at 33% or thereabouts when the return air temperature falls below the upper set point. If the temperature continues to fall, the compressor will be shut down at a lower set point at which the heating apparatus may be automatically and momentarily acti- vated. The compressor will not again be activated until the temperature rises above the upper set point. The heating is deactivated as soon as the temperature rises above the lower set point.

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