| 摘要 |
PROBLEM TO BE SOLVED: To efficiently condense a high-temperature and high-pressure gas refrigerant by providing a wall for forming a step between a sectional area decrease part and the refrigerant passage part of a condenser being located at the upstream. SOLUTION: An upstream side condensation acceleration part 461 is provided at the downstream side of a condenser 3 and is provided with a sectional area decrease passage A2, where a sectional area is decreased as compared with an upstream side refrigerant passage A1 at the downstream side of the upstream side refrigerant passage A1 being connected to the outlet of the condenser 3. Further, a wall for forming a step is provided between the upstream side refrigerant passage A1 and the sectional area decrease passage A2, and is formed to continuously and smoothly connect the upstream side refrigerant passage A1 to the upstream side sectional area decrease passage A2, thus efficiently condensing a high-temperature and high-pressure gas refrigerant being delivered from a compressor 2.
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