| 摘要 |
A double-tube type heat exchanger has a restriction hole, formed on an inner tube, through which a refrigerant introduced into an outer tube is introduced into the inner tube while the refrigerant expands. Therefore, a part of the refrigerant introduced into the outer tube can be introduced into the inner tube from the restricti on hole while the refrigerant expands. That is, the restriction hole formed on the inner tube serves as an expansion mechanism of a bypass flow. Therefore, this double-tu be type heat exchanger allows an injection circuit or a super-cooling circuit t o be compactly and inexpensively constructed.
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