Heat exchanger

Abstract

A heat exchanger from which condensation water is more smoothly discharged. In a heat exchanger (10), first cut lines (121) and second cut lines (122) are formed in a blank material for corrugated fins (12) before the blank material is bent in corrugations. The first cut lines (121) each cross an imaginary center line (X) of a bent section of the corrugations, and the second cut lines (122) each extend from the vicinity of an end of the first cut line (121) and cross the imaginary center line (X). When the blank plate is bent, acute-angled triangle portions sandwiched between the first cut lines (121) and the second cut lines (122) are raised to form cut-and-raised sections (12b). The distance between the top and root of each cut-and-raised section (12b) is greater than that of conventional products to increase the amount of contact between cut-and-raised sections (12b) adjacent to each other in the top-bottom direction. This allows condensation water to more easily flow through the cut-and-raised sections (12b), improving water discharge ability of the heat exchanger.

Description

technical field [0001] The present invention relates to a heat exchanger including flat tubes and fins. Background technique [0002] Conventionally, heat exchangers in which planar portions of flat tubes are arranged horizontally and fins are arranged between the planar portions have been widely used (see Patent Document 1). The heat exchanger disclosed in Patent Document 1 has a protruding portion protruding from the fin toward the downstream side of the air flow, and a notch is provided in the protruding portion. The dew condensation water generated in the heat exchanger collects on the downstream side of the air flow, and falls downward from the notch. However, the dew water will fall from the gap when the dew water grows to a size that can fall by its own weight. Otherwise, the dew water will temporarily stay in the heat exchanger, and the dew water will become ventilation resistance and reduce the heat exchange performance. Therefore, the applicant has developed a he...

AI Technical Summary

Problems solved by technology

[0003] However, in the situation where the miniaturization of heat exchangers is further progressing, there is a high possibility that the miniaturization of heat exchangers will reduce the drainage performance of the heat exchanger to dew condensation water, so further improvement of drainage performance is sought.

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