Pulse controlled solenoid valve with low ambient start-up means

Details Pulse controlled solenoid valve with low ambient start-up means Pulse controlled solenoid valve with low ambient start-up means

1986-11-28

1987-08-18

Tanner, Harry

Refrigeration

Automatic control

Refrigeration producer

62211, 62225, F25B 4104

Patent

active

046868356

ABSTRACT:
A refrigeration system including a solenoid actuated on-off modulated expansion valve and a controller for controlling the expansion valve is disclosed. The controller includes a low ambient start-up means responsive to the presence of liquid refrigerant at the inlet end of the expansion valve for overriding normal operations of the valve and maintaining the expansion valve open for refrigerant flow therethrough when liquid refrigerant is not present at the expansion valve. The low ambient start-up means includes temperature sensors upstream and downstream from the expansion valve to detect the temperature differential across the expansion valve. The temperature differential is compared to a threshold value and depending upon the comparison, either overrides the expansion valve to permit full flow therethrough or to allow the expansion valve to operate in response to the controller.

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Sales Brochure--Staefa Control Systems, Inc., Modulating Magnetic Valves, 15 pages.
Marketing Brochures--Valcor Solenoid Valves, High Flow Direct Acting Designs, pp. 1-3.

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