| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heat carrying circuit for carrying a fluid, e.g. air, into a forced air circulation cooling apparatus, e.g. a refrigerator or a freezer, while exchanging heat with refrigerant in which cooling capacity is enhanced by making uniform the air volume in the arranging direction of fins of a finned heat exchanger. SOLUTION: A bypass air duct 8 is provided between a finned heat exchanger 2 and a wall 7a while increasing the cross-sectional area gradually from the upstream side projecting part of a fan unit toward a direction parallel with a heating tube 4. Consequently, air volume distribution is made uniform in the arranging direction of fins 3 and cooling capacity can be enhanced. Furthermore, frost is formed uniformly in the arranging direction of fins 3 and the defrost operation time can be shortened.
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