Variable area refrigerant expansion device for heating mode of a

Details Variable area refrigerant expansion device for heating mode of a Variable area refrigerant expansion device for heating mode of a

1990-04-02

1991-03-26

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

623246, 13750535, G05D 1606

Patent

active

050020897

ABSTRACT:
A refrigerant flow metering device for use in a refrigeration system includes a housing having a flow metering passage extending therethrough. A partition is located within the flow passage of the housing and defines a flow metering port therethrough. The partition divides the flow passage into a high pressure and a low pressure portion. An elongated member extends into the metering port. The elongated member and the metering port cooperate to define a flow metering passage 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. One end of the elongated rod extends into the low pressure portion of the flow passage. 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 low pressure portion and atmospheric pressure.

REFERENCES:
patent: 583546 (1897-06-01), Pierson
patent: 2398503 (1946-04-01), Paasche
patent: 3037362 (1962-06-01), Tilney
patent: 3503417 (1970-03-01), Toda
patent: 4341090 (1982-07-01), Ramakrishnan

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