PULSED OPERATION CONTROL VALVE

摘要

A valve assembly (10) includes a refrigerant inlet port (18) and a refrigera nt outlet port (19) having a restricted opening (15), with the inlet port openi ng at least 2 times larger than the restricted outlet port opening. The valve includes components for opening and closing the inlet port (18) in response to valve cavity pressure between the inlet and outlet ports. The larger inlet port (18) relative to the restricted outlet port (19) provides for rapid pressure buildup in the valve cavity (24) when the inlet port is open which, in turn, causes rapid closing of the inlet port. The valve (10) is capable o f rapid cycling rates, highly effective for small refrigeration or cooling apparatus, as well as for controlling pressure in other applications requiri ng pressure regulation.