Servo-controlled expansion valve for a volatile fluid

Details Servo-controlled expansion valve for a volatile fluid Servo-controlled expansion valve for a volatile fluid

1991-04-08

1992-06-02

Michalsky, Gerald A.

Refrigeration

Automatic control

Refrigeration producer

62225, 251 3005, 251 614, 251 636, F25B 4106

Patent

active

051176475

ABSTRACT:
The expansion valve has an inlet connection fluidly connected to a main valve while the main valve is fluidly connected through an outlet connection to the inlet of the evaporator of a refrigeration system. The main valve has a housing that includes a main valve chamber and a valve seat for fluidly connecting the inlet connection to the main valve chamber and a valve member movable between an open position and blocking fluid flow through the valve seat from the inlet connection to the valve chamber. A pressure operated servo arrangement is disposed in the main valve chamber for controlling the movement of the valve element and opens to the pressure outlet of a pilot valve arrangement. The pilot valve arrangement is disposed in a branch path that opens to inlet connection and to the valve chamber downstream of the valve set for controlling the fluid pressure at the pressure outlet.

REFERENCES:
patent: 1758644 (1930-05-01), Betts et al.
patent: 3980002 (1976-09-01), Jarman et al.
patent: 4126293 (1978-11-01), Zeuner et al.
patent: 4606199 (1986-08-01), Gotzenberger

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