Thermostatic expansion valve for refrigeration installations

Details Thermostatic expansion valve for refrigeration installations Thermostatic expansion valve for refrigeration installations

1975-09-02

1977-06-28

Wayner, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, 137503, F25B 4104

Patent

active

040320707

ABSTRACT:
The invention relates to a thermostatic expansion valve assembly for a refrigeration installation of the type having condenser and evaporator units. The valve assembly controls the flow of refrigerant between the condenser and the evaporator and has a conventional operating unit which is dependent upon the superheat temperature of the evaporator. Condenser pressure for summer operation is on the order of being five to ten times greater than for winter operation and this represents a greater flow quantity. Compensation for this variance in condenser pressure is provided by a seat and closure member design in which the valve is caused to open at a slower rate than any increase in the condenser pressure. This is done by equipping the closure and valve seat with a piston and cylinder construction which defines an expansible chamber which has fluid communication with the condenser inlet port. An increase in condenser pressure causes expansion of the expansible chamber which in turn effects a closing force on the valve parts.

REFERENCES:
patent: 2004822 (1935-06-01), Mercier
patent: 2960845 (1960-11-01), Lange
patent: 3118494 (1964-01-01), Yost et al.
patent: 3478774 (1969-11-01), Noakes et al.
patent: 3903916 (1975-09-01), Waletzko

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