Refrigerant handling system with liquid refrigerant and multiple

Details Refrigerant handling system with liquid refrigerant and multiple Refrigerant handling system with liquid refrigerant and multiple

1992-06-17

1993-08-03

Wayner, William E.

Refrigeration

Processes

Assembling, charging, or repairing of refrigeration producer

62149, F25B 4500

Patent

active

052318427

ABSTRACT:
A refrigerant handling system that includes a compressor for pumping refrigerant through the system, and an evaporator connected to the compressor inlet for ensuring that refrigerant fed to the compressor inlet is in vapor phase. A flow control device is coupled to the inlet of the evaporator for controlling flow of refrigerant to the evaporator, and comprises a thermostatic expansion valve having first and second pressure inputs, and valve elements for controlling flow of refrigerant through the valve to the evaporator as a function of a pressure differential between the pressure inputs. A first bulb containing refrigerant is sealingly coupled to the first pressure input of the valve, and is positioned so as to supply a first control pressure to the valve as a function of vapor pressure of refrigerant in the bulb at the temperature of refrigerant entering the evaporator. A second bulb containing the same type of refrigerant is sealingly coupled to the second pressure input of the valve, and is positioned to supply a control pressure to the second valve input as a function of vapor pressure of refrigerant at the temperature of refrigerant exiting the evaporator.

REFERENCES:
patent: 2008663 (1935-07-01), Dillman
patent: 2410795 (1946-11-01), Dillman
patent: 2583178 (1952-01-01), Huntington
patent: 4745767 (1988-05-01), Ohya et al.
patent: 4879879 (1989-11-01), Marsala et al.
patent: 5040382 (1991-08-01), Abraham

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