KR19980060342A - High efficiency heat exchanger - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fins of heat exchangers and to improving heat transfer through the improvement of dead zone sections of the pipe backflow.

In a heat exchanger in which a first working fluid (refrigerant) flows inside a pipe, a second working fluid (air) flows outside the pipe, and a plurality of fins are vertically stacked outside the pipe, perforations or protrusions A high efficiency heat exchanger, characterized in that formed.

Description

High efficiency heat exchanger

1 is a schematic view of a conventional heat exchanger.

2 is a dead zone in the prior art pipe.

3 is a detail of the heat exchanger fin surface of the present invention.

(A) is perforation

(B) where the protrusion is attached

Explanation of symbols for the main parts of the drawings

101: tube 102: pin

104: slit 105: perforated

106: protrusion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fins of heat exchangers and to improving heat transfer through the improvement of dead zone sections of the pipe backflow.

In a conventional heat exchanger having a circular tube, a refrigerant flows into the tube 1 and a fin 2 is attached to the outside of the tube to transfer heat between the air and the refrigerant.

Fin efficiency is deteriorated due to the development of a dead zone occurring in the pipe wake of the conventional round tube heat exchanger.

The present invention has been invented in view of such a point, so that one or more perforations or protrusions are installed in the dead zone that inhibits heat transfer in the posterior wall, thereby bringing about a dead zone disconnection effect in this zone, and the tip by the perforated or protrusion. It is about bringing effects and improving heat transfer.

This will be described based on the accompanying drawings.

In the heat exchanger in which the 1st working fluid (refrigerant) flows in a pipe | tube, the 2nd working fluid (air) flows outside a pipe | tube, and many fins are laminated | stacked vertically in the pipe | tube outside in FIG. The heat exchanger of the heat exchanger is composed of a perforation 105 or a protrusion 106 on the tube 101, the tube 102, and the dead zone on the surface of the fin, in particular, on the tube wake side, through which heat is transferred to the air. The perforations or protrusions may be made of one or more, and the perforations or protrusions may be made in various shapes such as circular, elliptical polygons. The installation of perforations or protrusions inhibits the thermal layer developed on the air side and reduces the air circulation, leading to an increase in turbulence, resulting in an average heat transfer coefficient. This exhibits the effect of improving heat transfer between air and refrigerant.

Claims (3)

In a heat exchanger in which a first working fluid (refrigerant) flows inside a pipe, a second working fluid (air) flows outside the pipe, and a plurality of fins are vertically stacked outside the pipe, perforations or protrusions A high efficiency heat exchanger, characterized in that formed. The high efficiency heat exchanger according to claim 1, wherein one or more perforations or protrusions are provided on one fin. The high efficiency heat exchanger according to claim 1, wherein the shape of the perforations or protrusions is circular, elliptical, polygonal.