| 摘要 |
A heat exchanger apparatus 10 that has one or more tubes 12 for carrying a first heat transfer fluid, such as a refrigerant. Fins are provided in thermal communication with the tubes. Some of the fins have fin collar bases 16 that are positioned around the outside perimeters of the tubes 12 . One or more bumps 20 protrude from at least some of the fin collar bases 16 . The bumps disturb a second heat transfer fluid, such as air, that passes over the fins 14 and the tubes 12 . Also disclosed is a method for improving the efficiency of heat exchangers.
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