Plate type heat exchanger

摘要

A plate heat exchanger for use as an evaporator in a refrigerator including a compressor, a condenser, an expansion valve and the evaporator which cooperate to perform a refrigeration cycle. The plate heat exchanger comprises a plurality of plates stacked on each other to define chambers of a refrigerant and chambers of a medium to be cooled, a refrigerant introduction passage means extending through the plates and provided with orifices for delivering the refrigerant from the refrigerant introduction passage means to the refrigerant chambers, and a refrigerant stirring member for stirring the refrigerant supplied into the refrigerant introduction passage means in the form of a wet steam to make the refrigerant uniform. In both of the case where the stirring member is provided and the case where it is not provided, a uniform refrigerant in the heat exchanger will be attained by providing a refrigerant inlet pipe at a lower part of one side of the heat exchanger thereof in which an inlet/outlet port for a medium to be cooled is provided and by providing a refrigerant outlet pipe at an upper part of the other side of the heat exchanger opposite to the above-noted one side thereby making the refrigerant flow in the heat exchanger smooth.