Refrigeration – Automatic control – Refrigeration producer
Patent
1987-03-26
1988-06-14
Tapolcai, William E.
Refrigeration
Automatic control
Refrigeration producer
236 92B, 251282, F25B 4104
Patent
active
047503343
ABSTRACT:
A thermostatic expansion valve particularly for use in a refrigeration system in which the refrigeration system includes a compressor, condenser, and evaporator operatively interconnected. The expansion valve includes a diaphragm for sensing a capillary pressure and a plurality of push rods for communicating the capillary pressure to a spring-biased valve member operatively associated with a valve seat. A piston in communication with the diaphragm has one end located in an inlet chamber and responds to an inlet chamber pressure. The piston, diaphragm, push rods and spring-biased valve member cooperate to provide a balanced flow of a refrigerant through the expansion valve without the piston or push rods substantially restricting or obstructing refrigerant flow through the expansion valve.
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patent: 3389796 (1968-06-01), Frala et al.
patent: 3699778 (1972-10-01), Orth
patent: 3960358 (1976-06-01), Vollmer et al.
patent: 4621767 (1986-11-01), Denneny, Jr. et al.
Sporlan Valve Company
Tapolcai William E.
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