JPS5823105Y2 - Netsukou Kanki - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wire fin tube heat exchanger used in a condenser of a small refrigerator, etc.

A conventional wire fin tube type heat exchanger will be explained with reference to FIG.

Reference numeral 1 designates a tube whose end side is bent into an arc shape and the entire structure is formed in a meandering shape, and reference numeral 2 designates wire fins welded to opposite surfaces of the tube 1 so as to be perpendicular thereto.

In such a heat exchanger, when the pitch of the wire fins 2 is narrowed in order to increase the amount of heat transfer by increasing the overall area of the wire-fins 2, the heat transfer coefficient decreases due to the interference of the mutual boundary layer of the wire fins 2. reduced wire fin 2
Even if the heat transfer area is increased, the amount of heat transfer decreases.

Hereinafter, one embodiment of the present invention will be explained with reference to FIG.

1 is a tube formed in a meandering shape; 2 is a vertical wire fin arranged perpendicularly to the linear part of the tube; 3 is a horizontal wire fin arranged parallel to the tube 1 and perpendicular to the vertical wire fin 2; The intersection of the two is fixed by welding.

This horizontal wire fin 3 is provided so as not to overlap the tube 1.

With this configuration, the heat transfer area can be increased without narrowing the fin pitch of the wire fins 2 and 3, so that interference between the boundary layers between the wire fins 2 and the wire fins 3 can be reduced. The amount of heat transfer can be increased without reducing the heat transfer coefficient, and the orthogonal parts of the wire fins 2 and 3 disturb the airflow around them, improving the heat transfer coefficient and making a small and efficient heat exchanger at a low cost. You can get it at

In addition, since the meandering tube 1 and the wire fin 2 are always welded in one piece on both sides, and the two wire fins do not overlap, they can be reliably welded under the same conditions, and there is no reduction in heat transfer ability due to non-welding. This has a great practical effect of not having any problems.

[Brief explanation of drawings]

FIG. 1 is a front view showing a part of a conventional wire fin tube type heat exchanger, and FIG. 2 is a front view showing a part of a wire fin tube type heat exchanger according to the present invention.

Claims (1)

[Scope of utility model registration request] In a wire fin tube heat exchanger in which wire fins 2 are vertically orthogonally welded to both sides of a serpentine tube 1, horizontal wire fins 2 are welded vertically orthogonally to the longitudinal wire fins 2 and parallel to the serpentine tube 1. A heat exchanger characterized in that wire fins 3 are welded to the vertical wire fins 2, and the horizontal wire fins 3 are provided so as not to overlap the meandering tubes 1.