Thermostatic expansion valve with lead-lag compensation

Details Thermostatic expansion valve with lead-lag compensation Thermostatic expansion valve with lead-lag compensation

1978-12-18

1980-12-02

Makay, Albert J.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62224, 251 23, G05D 2700

Patent

active

042366690

ABSTRACT:
A thermostatic expansion device for use in refrigeration systems includes a valve member adapted to control the flow of liquid refrigerant from a condenser to an evaporator of the refrigeration system. A pressure-responsive device is operatively connected to the valve member for responding to a differential pressure in the refrigeration system so as to open and close the valve member. A temperature-responsive device is operatively connected to the pressure-responsive device for responding to a temperature of the refrigerant at the outlet of the evaporator. A lead-lag compensation structure is connected to the pressure-responsive device for permitting a rapid movement of the valve member upon the occurrence of a sudden change either in the temperature of the refrigerant at the outlet of the evaporator or in the pressure at the inlet of the evaporator thereby maintaining a constant superheat at the outlet of the evaporator so as to effect stability of the refrigeration system.

REFERENCES:
patent: 2557287 (1951-06-01), Hormann
patent: 2579334 (1951-12-01), Plank
patent: 2967403 (1961-01-01), Lange et al.
patent: 3034534 (1962-05-01), Gustafsson
patent: 3699778 (1972-10-01), Orth
patent: 3742722 (1973-07-01), Leimbach
patent: 3803864 (1974-04-01), Cooper

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