JPS63259394A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve the heat exchanging rate by bending a part of pipes which are routed through fins such that the fin pitch in the curved part is made greater than that of the straight part. CONSTITUTION:By making the inner fin pitch fp13 of a curved part A of a heat exchanger 11 nearly equal to the fin pitch fp12 of the straight part, the draft resistance of the straight part becomes nearly equal to the draft resistance of the curved part. Because of this, the air can easily flow through the curved part A, and the curved part A can be effectively utilized as a heat generating surface to improve the heat exchanging rate.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchanger used in air conditioning equipment and the like.

BACKGROUND OF THE INVENTION In recent years, heat exchangers have been used in a variety of fields in the air conditioning industry, etc., and their shapes have become various, such as those bent into L-shapes and U-shapes in response to demands for compactness.

A conventional heat exchanger will be explained below.

Figures 3 and 4 show conventional heat exchangers; 1 is a heat exchanger;
2 is a heat exchanger tube group, and 3 is a fin group.

FIG. 5 shows the heat exchanger 4 before a part of the heat exchanger 1 is bent, and the fin groups 3 are arranged and inserted at a constant pitch in the heat exchanger tube group 2.

Since the heat exchanger 1 shown in FIGS. 3 and 4 is a partially curved version of the heat exchanger 4 shown in FIG. pitch f
It becomes smaller than P2.

Problems to be Solved by the Invention However, in the above configuration, the fin pitch fP1 becomes extremely small in the inner curved part of the curved part, and adjacent fins come into contact with each other and become blocked.
The air resistance increases and the volume of air 5 flowing through the curved part is extremely reduced.The air 6 no longer flows, and the curved part does not contribute effectively to the heat transfer area, reducing the amount of heat exchange. There was a problem.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above problems, effectively utilize the heat transfer area of the curved portion, and improve the amount of heat exchange.

Means for Solving the Problems In order to solve the above problems, the heat exchanger of the present invention includes a group of heat transfer tubes through which a fluid flows, and a fin inserted into the group of heat transfer tubes through which air flows. The heat exchanger tube group is composed of a group of fins, and the heat exchanger tube group inserted into the fin group is partially curved, and the fin pitch of the curved portion is made larger than the fin pitch of the straight portion.

Effect In the above configuration, by making the fin pitch of the curved part larger than the fin pitch of the straight part, the increase in air resistance due to the fins of the curved part is eliminated, air flows more easily in the curved part, and the transmission of air in the curved part is improved. Thermal area can be used effectively and the amount of heat exchange can be improved.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

In FIG. 1, 11 is a heat exchanger, 12 is a heat exchanger tube through which a fluid flows, and 13 is a group of fins inserted into the heat exchanger tube 12. Air 14 flows between them in the direction of the arrow. In FIG. 2, 15 is a heat exchanger before a part of the heat exchanger 11 is curved, and the fin pitch f of the curved part A is
P11 is made larger than the fin pitch 'P12 of the straight section.

Therefore, in the heat exchanger 11, the inner fin pitch fP13 of the curved portion A is approximately the same as the fin pitch fP12 of the straight portion, and the air resistance of the straight portion and the air resistance of the curved portion are approximately equal. As a result, air does not flow into the curved portion A, and the curved portion A can be effectively utilized as a heat transfer area, thereby improving the amount of heat exchange.

Effects of the Invention As described above, the heat exchanger of the present invention includes a group of heat transfer tubes that flow inside, and a group of fins that are inserted into the group of heat transfer tubes and between which air flows. The heat transfer tube group is partially curved, and the fin pitch in the curved part is larger than the fin pitch in the straight part, so it is possible to suppress the increase in air resistance in the curved part, and the curved part can be used as a heat transfer area. , can be used effectively and the amount of heat exchange can be improved.

[Brief explanation of drawings]

FIG. 1 is a top view of essential parts of a heat exchanger according to an embodiment of the present invention, FIG. 2 is a top view of essential parts of the heat exchanger before bending, and FIG. 3 is a perspective view of a conventional heat exchanger. 4 is a top view of the main parts of the conventional heat exchanger, and FIG. 6 is a top view of the main parts of the conventional heat exchanger before bending. 11... Heat exchanger, 12... Heat exchanger tube group, 13... Fin group. Name of agent: Patent attorney Toshio Nakao and 1 other person11
-Ichisuko J Souki Figure 2 S

Claims (1)

[Claims] It consists of a group of heat transfer tubes through which fluid flows, and a group of fins inserted into the group of heat transfer tubes through which air flows. A heat exchanger characterized in that the pitch of the fins is larger than the fin pitch of the straight portion.