초록 ▼

A refrigerant flow switching device for alternately conveying refrigerant from a high pressure and a low pressure evaporator to a compressor of a refrigeration system, and a refrigerator using such a refrigeration system, includes a refrigerant flow switching valve for alternately conveying refriger

A refrigerant flow switching device for alternately conveying refrigerant from a high pressure and a low pressure evaporator to a compressor of a refrigeration system, and a refrigerator using such a refrigeration system, includes a refrigerant flow switching valve for alternately conveying refrigerant from the high and low pressure evaporators to the compressor. Said switching valve is controlled by a pressure switch that utilizes the pressure difference between the refrigerant from the high pressure evaporator and that from the low pressure evaporator to cyclically open or close a switch assembly, moving the switch between low and high pressure positions.

대표청구항 ▼

A flow switching device for alternately conveying refrigerant from low and high pressure evaporator means to compressor means of a refrigeration system, said device comprising: a switching valve adapted to move between a low and high pressure position allowing said refrigerant to flow alternately an

A flow switching device for alternately conveying refrigerant from low and high pressure evaporator means to compressor means of a refrigeration system, said device comprising: a switching valve adapted to move between a low and high pressure position allowing said refrigerant to flow alternately and respectively from said low and high pressure evaporator means to said compressor means; and a pressure switch between said high pressure evaporator means and said low pressure evaporator means, said pressure switch connected to said switching valve and adapted to move said switching valve between said low and high pressure positions and comprising: a piston housing positioned in a refrigerant flow relationship between said high and low pressure evaporator means, said housing being divided into a first portion and a second portion by a ferrous metal piston slidably positioned therein; a rocker arm chamber positioned in a slidable relationship with said piston housing and having first and second magnetized junctions mounted on a rocker arm; and a switch assembly electrically connected to said switching valve such that when said piston is in a first position said switch assembly is opened and moves said switching valve to said low pressure position, and when said piston is in a second position said switch assembly is closed and moves said switching valve to said high pressure position.