| 摘要 |
PROBLEM TO BE SOLVED: To make uniform the amount of heat exchange (degree of cooling) with air passing a heat exchanger having a plurality of channels. SOLUTION: The heat exchanger has two heat exchanger bodies 18a and 18b in the direction of draft while being divided into two portions in the width direction of the heat exchanger, and allows a refrigerant to flow to the upstream heat exchanger body 18a from the downstream heat exchanger body 18b in the direction of draft. The heat exchanger body 18b comprises first and second channels 22 and 23, and the heat exchanger body 18a comprises third and fourth channels 24 and 25. By allowing the number of tubes 6a and 6b for composing the channels 22, 23, 24, and 25 to differ, a part where temperature is high is overlapped with a part where temperature is low, thus making uniform the degree of cooling.
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