| 摘要 |
<p>Provided is a double-pipe heat exchanger that can be compactly configured, but is capable of restraining the outflow of a liquid refrigerant contained in a gas-liquid two-phase refrigerant from an inner pipe, and is capable of preventing the occurrence of refrigerant flood back. The double-pipe heat exchanger (31) is provided with: an outer pipe (32) that allows a high-pressure liquid refrigerant to flow therethrough; and an inner pipe (33) having an inlet-side end (33A), which allows a low-pressure gas-liquid two-phase refrigerant, which is obtained by reducing the pressure of the high-pressure liquid refrigerant, to flow in, and an outlet-side end (33B) connected to the suction-side of a compressor. The double-pipe heat exchanger (31) comprises a plurality of vertical pipes (34A, 34B) arranged in a vertical direction, and a curved pipe (35) that connects the ends of the plurality of vertical pipes (34A, 34B). The outlet-side end (33B) of the inner pipe (33) is provided to the upper end of one vertical pipe (34B), and the inlet-side end (33A) of the inner pipe (33) is provided to the upper end of the other vertical pipe (34A).</p> |
