Pulse controlled solenoid valve with low ambient start-up means

Patent · Tue Aug 18 00:00:00 EDT 1987

OSTI ID:6152322

Alsenz, R H

A refrigeration system is described having in a closed loop connection a compressor having an inlet and an outlet end, a condenser connected to the outlet end of the compressor and responsive to a high pressure gaseous phase recirculating refrigerant for condensing the refrigerant from its gaseous to its liquid phase, an evaporator having an inlet and an outlet end and connected to the condenser and to the inlet end of the compressor, an expansion valve having an inlet and an outlet end and connected between the outlet end of the condenser and the inlet end of the evaporator, the condenser delivering high pressure liquid refrigerant to the inlet end of the expansion valve. The refrigerant expands as it flows through the expansion valve, a controller circuit responsive to the superheat of the refrigerant in the evaporator for controlling the flow of refrigerant through the expansion valve, and 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, the low ambient start-up means returning control for normal operations of the valve when liquid refrigerant is present.

• Assignee: NOV; NOV-87-077425; EDB-87-162943
• Patent Number(s): US 4686835
• OSTI ID: 6152322
• Resource Relation: Patent File Date: Filed date 28 Nov 1986
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BUILDINGS
REFRIGERATORS
SOLENOIDS
START-UP
VALVES
CIRCULATING SYSTEMS
COMPRESSORS
CONDENSERS
EVAPORATORS
LIQUID FLOW
PULSE TECHNIQUES
REFRIGERANTS
SUPERHEATING
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
HEATING
WORKING FLUIDS
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)