Thermostatic expansion valve with bi-directional flow

Details Thermostatic expansion valve with bi-directional flow Thermostatic expansion valve with bi-directional flow

1990-02-28

1990-12-18

Tapolcai, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, 251326, F25B 4104

Patent

active

049780620

ABSTRACT:
This thermostatic expansion valve (2) for heating-cooling refrigeration systems includes a body (4,8) having a transverse linear flow channel (10) therethrough. A tapered control valve element (12) divides the flow into identical inflow-outflow chambers (14,16) having equally sized inflow-outflow ports (22,24). The control valve element (12), when seated, prevents flow between the chambers (14,16), and is urged into a normally closed position by a biasing spring (26). A motor assembly (6) responsive to evaporator outlet pressure or compressor suction pressure, and temperature also controls movement of the valve element (12).

REFERENCES:
patent: 2668396 (1954-02-01), Kern
patent: 3397552 (1968-08-01), Harnish
patent: 3871615 (1975-03-01), Donner
patent: 4389037 (1983-06-01), Anders
patent: 4467621 (1984-08-01), O'Brien

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