Heat exchanger and air conditioner

Patent metadata

Field	Value
Publication number	US-9316446-B2
Application number	US-201213980650-A
Country	US
Kind code	B2
Filing date	Jan 23, 2012
Priority date	Jan 21, 2011
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A heat exchanger includes flat tubes and fins. The fins are corrugated fins, and are disposed between the flat tubes that are vertically arranged. Between the vertically arranged flat tubes, heat transfer parts of each of the fins are arranged in the direction in which the flat tubes extend. Each of the heat transfer parts include louvers that extend in an up-and-down direction. Bent-out ends of the windward louvers include main edges, upper edges, and lower edges. The upper edges and the lower edges are tilted relative to the main edges. The tilt angle θ 5 of the lower edges relative to the main edges is smaller than the tilt angle θ 4 of the upper edges relative to the main edges.

First claim

The invention claimed is:

1. A heat exchanger, comprising:
flat tubes vertically arranged with side surfaces thereof facing one another, each of the flat tubes including a fluid passage therein; and
fins each dividing a space between adjacent ones of the flat tubes into a plurality of air passages through which air flows, wherein
each of the fins includes heat transfer parts each having a plate shape extending from an adjacent one of the flat tubes to another adjacent one of the flat tubes, the heat transfer parts forming side walls of the air passages,
in the fins, louvers that extend in an up-and-down direction and bend out from the heat transfer parts are arranged in an air passage direction,
a bent-out end of each of the louvers includes a main edge, an upper edge extending from an upper end of the main edge to an upper end of the louver and tilted relative to the main edge, and a lower edge extending from a lower end of the main edge to a lower end of the louver and tilted relative to the main edge,
at least one of the louvers provided on each of the heat transfer parts of the fins is a symmetric louver which is located in a leeward region of the louvers and in which a tilt angle of the lower edge relative to the main edge is equal to a tilt angle of the upper edge relative to the man edge,
the or each of the other louvers located at a windward side of the symmetric louver is an asymmetric louver in which a tilt angle of the lower edge relative to the main edge is smaller than a tilt angle of the upper edge to the main edge, and
in each of the heat transfer parts of the fins, the or each asymmetric louver is arranged only windward of the symmetric louver or louvers.

2. The heat exchanger of claim 1 , wherein
the fins each have a plate shape with notches into which the flat tubes are inserted, are arranged to be spaced from one another by a predetermined distance in a direction in which the flat tubes extend, and sandwich the flat tubes at edges of the notches, and
parts of the fins between vertically adjacent ones of the notches are the heat transfer parts.

3. The heat exchanger of claim 1 , wherein
each of the fins is a corrugated fin that bends up and down and is located between adjacent ones of the flat tubes, includes the heat transfer parts arranged in a direction in which the flat tubes extend, and also includes intermediate plate parts continuous to upper or lower ends of adjacent ones of the heat transfer parts and joined to the flat tubes.

4. An air conditioner, comprising:
a refrigerant circuit including the heat exchanger of claim 1 , wherein
the refrigerant circuit circulates refrigerant therein, thereby performing a refrigeration cycle.

Assignees

• Yoshioka Shun
• Kamada Toshimitsu
• Daikin Ind Ltd

Inventors

• Yoshioka Shun
• Kamada Toshimitsu

Classifications

• F28F2215/04

  Assemblies of fins having different features, e.g. with different fin densities · CPC title

• F28F19/006

  Preventing deposits of ice · CPC title

• F25B39/00

  Evaporators; Condensers · CPC title

• F28F1/325 Primary

  Fins with openings · CPC title

• F28F17/005

  Means for draining condensates from heat exchangers, e.g. from evaporators (F28B9/08 takes precedence) · CPC title