Heat exchanger and air conditioner using the same

TLDR: In this article, the authors proposed a heat exchanger with high efficiency, in which condensation performance and evaporation performance of the heat exchange are improved while suppressing an increase in draft resistance.

Abstract: PROBLEM TO BE SOLVED: To provide a heat exchanger with high efficiency, in which condensation performance and evaporation performance of the heat exchanger are improved while suppressing an increase in draft resistance.SOLUTION: The heat exchanger includes a first heat exchanger and a second heat exchanger, each having a plurality of plate-like fins arranged in the direction of the plate thickness and heat conduction pipes in a plurality of stages penetrating the plate-like fins and disposed in a longitudinal direction of the plate-like fins. The heat exchanger exchanges heat between air and a refrigerant by circulating the refrigerant in the heat conduction pipes and supplying air in a perpendicular direction with respect to the plate thickness direction of the plate-like fins. The first heat exchanger is located in a windward side of the second heat exchanger. Each of the plate-like fins of the first heat exchanger and the second exchanger has a chevron shape in the longitudinal direction, formed such that the chevron shape formed in the plate-like fins of the first heat exchanger is lower than the chevron shape formed in the plate-like fins of the second heat exchanger. The pipe diameter of the heat conduction pipes in the first heat exchanger is smaller than the pipe diameter of the heat conduction pipes in the second heat exchanger.