| 摘要 |
PROBLEM TO BE SOLVED: To utilize the entire heat exchanger more efficiently by altering the cross-sectional area of a channel formed in a tube. SOLUTION: The tube structure of a microchannel heat exchanger comprises a lower header 1 having a cavity and being fed with refrigerant, an upper header 2 of the same shape as the lower header 1 and disposed above the lower header 1 oppositely thereto, a plurality of tubes 4 disposed, at a specified interval, along the longitudinal direction of two headers 1 and 2 while being secured thereto at the opposite ends thereof with a plurality of elongated channels being formed internally to communicate with the cavities of both headers 1 and 2 and the cross-sectional areas thereof parallel in the longitudinal direction decreasing at a constant ratio from the inlet side toward the outlet side of flowing air, and multiple fins 6 fixed between the tubes 4 and exchanging heat with the flowing air.
|
