Refrigeration control apparatus
OwnerWilliam A. Zumbielinventor
Life of this patent
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Abstract
A refrigeration system including a pressure actuated switch for controlling the refrigeration compressor. The actuator of the switch is connected directly to the refrigerant line by a small capillary tube so that changes in refrigerant pressure effect changes in the position of the switch. Positioned between the pressure actuated switch and the refrigerant line is a bi-directional check valve which permits refrigerant pressure changes to be transmitted through the capillary line to the pressure actuated switch, but which functions to seal off the refrigerant line in the event of a break in the capillary tube.
Claims6
A refrigeration cooling system which comprises a motor driven compressor for increasing the pressure of a refrigerant material in said system;
- a condenser for removing heat to cool said pressurized refrigerant material after it exits from said compressor;
- an expansion valve;
- an evaporator through which said cooled pressurized refrigerant passes to extract heat from the area surrounding said evaporator before being returned to the inlet side of said compressor;
- and a control unit for controlling the operation of said compressor, said control unit comprising a pressure actuated switch to control operation of said compressor and a capillary tube connecting said switch with the flow path of said refrigerant, the improvement in combination therewith which comprises:
- a bi-directional check valve positioned between said pressure actuated switch and the flow path of said refrigerant, said valve permitting refrigerant pressure changes to be transmitted directly through said capillary tube to said pressure actuated switch so long as said capillary line remains unbroken, said check valve further functioning to seal off the flow path of said refrigerant in the event a break occurs in said tube.
Dependencies are inferred from the claim text.