Variable area refrigerant expansion device

Details Variable area refrigerant expansion device Variable area refrigerant expansion device

1990-04-02

1991-04-02

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

623246, 1374932, G05D 701

Patent

active

050040081

ABSTRACT:
A refrigerant flow metering device which varies the expansion area of the device in response to the differential pressure between refrigerant in the high and low pressure sides of a refrigerant system. The expansion device includes a housing with a flow passage extending therethrough which is divided into a high pressure portion and low pressure portion by a partition. The partition has a flow metering port which extends therethrough and interconnects the high and low pressure portions. An elongated member extends through the flow metering port and cooperates with the flow metering port to define a refrigerant flow metering passageway therebetween. The elongated member is configured to vary the cross-sectional area of the flow metering passage in relation to the position of the elongated member to the flow metering port. Means are provided for supporting the elongated member within the flow passage and for controlling the axial position of the elongated member within the passage in response to the differential pressure between refrigerant in the high pressure portion and the low pressure portion.

REFERENCES:
patent: 3741241 (1973-06-01), Jackson
patent: 3992898 (1976-11-01), Duell
patent: 4513777 (1985-04-01), Wright

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