Pressure compensated control for air conditioning system or heat pump
Air conditioning system Patent #: 4480442
ApplicationNo. 07/022816 filed on 03/06/1987
US Classes:62/228.3, By refrigerant pressure62/209, Compensating or modifying62/228.4By variable speed motor or pulley type mechanism
ExaminersPrimary: Tanner, Harry B.
Attorney, Agent or Firm
International ClassF25B 49/02 (20060101)
Foreign Application Priority Data1986-03-28 JP
AbstractA refrigerating apparatus executing the redistributing operation of refrigerant when the actual suction pressure of a compressor is lower than a suction pressure lower limit value. The suction pressure lower limit value is varied in response to the condensation temperature of refrigerant which varies in accordance with the actual temperature in the vicinity of a condenser. When the condensation temperature of refrigerant is greater than a predetermined comparison value, a first limit value is selected as the suction pressure lower limit value. Otherwise, a second limit value less than the first limit value is selected. The refrigerating apparatus may be controlled in accordance with the selected suction pressure lower limit value.
Field of SearchBy refrigerant pressure
Compressor or its drive controlled
By variable speed motor or pulley type mechanism
By variable compressor output, e.g., unloading, staging, etc.
Controlling compressor or its drive, e.g., torque or speed
Plural refrigerating producing elements and plural sensors
Single refrigeration producer controlled by plural sensors
Compensating or modifying
Back flow or pressure regulator
Controlling variable compressor capacity