Thermostatic expansion valve

Details Thermostatic expansion valve Thermostatic expansion valve

1990-12-05

1991-11-19

Tapolcai, William E.

Refrigeration

Automatic control

Refrigeration producer

62225, 236 92B, 236 99E, F25B 4104

Patent

active

050655957

ABSTRACT:
This thermostatic expansion valve (12) is intended for use in a refrigeration system (10) which includes a compressor (14), a condenser (16) and an evaporator (18). The valve (12) includes a valve body (20) having an inlet (26) and an outlet (28). A valve port (34) and a valve element (38) are disposed between the inlet and outlet. Upper and lower diaphragm assemblies (24, 25) are provided at each end of the valve (12) connected to associated sensing bulbs (56, 58) at the inlet and outlet respectively of the evaporator (18). A push rod assembly (40) operatively interconnects the upper and lower diaphragm assemblies (24, 25) and modulates the valve element (38) in response to the change in differential temperature across the evaporator. A compression spring (36) acts directly on the valve element and provides an adjustable feature.

REFERENCES:
patent: 990772 (1911-04-01), Pollard
patent: 2511565 (1950-06-01), Carter
patent: 2529378 (1950-11-01), Dube et al.
patent: 3785554 (1974-01-01), Proctor

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