DOUBLE-TUBE TYPE HEAT EXCHANGER AND REFRIGERATING MACHINE USING THE HEAT EXCHANGER

摘要

A double-tube type heat exchanger has a restriction hole, formed on an innertube,through which a refrigerant introduced into an outer tube is introduced intothe innertube while the refrigerant expands. Therefore, a part of the refrigerantintroducedinto the outer tube can be introduced into the inner tube from the restrictionholewhile the refrigerant expands. That is, the restriction hole formed on theinner tubeserves as an expansion mechanism of a bypass flow. Therefore, this double-tubetype heat exchanger allows an injection circuit or a super-cooling circuit tobecompactly and inexpensively constructed.