Refrigeration expansion valve

Details Refrigeration expansion valve Refrigeration expansion valve

1971-03-23

1976-07-06

Sprague, Kenneth W.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, 251282, G05D 2700

Patent

active

039677826

ABSTRACT:
A refrigeration system has the system condenser exposed to the normal outdoor ambient temperature. The control means includes a single balanced expansion valve having a maximum port opening which is oversized as compared to that required only for normal summer operation, and the valve is actuated to provide a much larger increase in port opening under winter conditions than have heretofore been used. The result is that the system operates without adjustment or modification over an exceptionally wide range of condenser ambient temperature. The balanced valve is actuated by motor means responsive to evaporator outlet temperature and an evaporator pressure condition such as inlet or outlet pressure. The valve element may be slightly over or under balanced to provide predetermined operating characteristics.

REFERENCES:
patent: 2051971 (1936-08-01), Swart
patent: 2052769 (1936-09-01), Hoesel
patent: 2148413 (1939-02-01), Labberton et al.
patent: 2897836 (1959-08-01), Peters et al.
patent: 2937505 (1960-05-01), Merrell
patent: 2967403 (1961-06-01), Lange et al.
patent: 3189277 (1965-06-01), Fox
patent: 3194499 (1965-07-01), Noakes et al.
patent: 3246840 (1966-04-01), Matthies
patent: 3402566 (1968-09-01), Leimbach
patent: 3537645 (1970-11-01), Treder
air Conditioning & Refrigeration Business, May, 1969, Industrial Publishing Co.
"A New Concept in Outdoor Systems," Jan., 1969, Bohn Aluminum & Brass Co.

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