JPS6033494A - Heat exchanger - Google Patents

Abstract

PURPOSE:To disturb airflow around the pipes of first row and improve the heat conducting performance of the heat exchanger by providing cylindrical members in zigzag with respect to the pipes of the first row. CONSTITUTION:The cylindrical members 5, having cylindrical outer peripheral surfaces and arranged in parallel along the side rim of upstream side of plate fins 1 with intervals into directions intersecting with the flow direction of the airflow, are provided and both ends thereof are penetrated through and fixed to the end plates 3. The cylindrical members 5 are arranged in zigzag with respect to the pipes 2a in a first row. When air is flowed into the direction A, the flow of air is disturbed in the wake flow of the cylindrical members 5 by the same members 5 and eddy currents X are generated. As a result, the airflow around the pipes 2a of the first row is disturbed and heat conducting performance around the pipes 2 is increased, therefore, a performance as the heat exchanger is improved remarkably. Ventilating resistance is increased slightly by the provision of the cylindrical members 5, however, most of the ventilating resistance of the heat exchanger, consisting of the plate fins 1 and the pipes 2, is occupied by the frictional loss of the plate fins 1, therefore, the resistance due to the configuration of the cylindrical member 5 is not increased so much.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchanger for use in the field of air conditioners.

Structure of the conventional example and its problems The conventional heat exchanger, as shown in Figs. 1 to 3,
Fins 1a, 1b, 1 arranged in parallel at regular intervals, divided into at least two parts in the front and back with respect to the flow direction of the airflow flowing in the direction of arrow (A), and adjacent in the front and back direction.
It is composed of a large number of plate-shaped fins 1 whose fins are not arranged on the same plane, a large number of pipes 2 which penetrate orthogonally to these plate-shaped fins 1, and an end plate 3.

The heat source fluid flowing through the pipe 2 and the air flowing in the direction of arrow (A) exchange heat via this heat exchanger. By the way, in such a heat exchanger, as shown in Fig. 2, when air flows in the direction of the arrow (m), the flow is turbulent at the downstream part of the pipe 2a in the - row, and the flow is disturbed (in the arrow).
A vortex as shown in is generated.

As a result, this flow affects the second row of pipes 2b, disturbs the flow around the pipes 2b, and improves the heat transfer performance around the pipes. Similarly, a vortex (C
) disturbs the flow around the pipe 2C and improves the heat transfer performance around the pipe. However, the flow around the pipes 2a in the first row is not provided with anything to disturb the flow on the windward side, so the heat transfer performance around the pipes is not fully utilized. In other words, conventional heat exchangers were not configured to disturb the flow around the windward pipes.
It was in a state where it could not fully demonstrate its heat transfer performance as a heat exchanger.

Purpose of the Invention In view of the above-mentioned conventional problems, an object of the present invention is to provide a heat exchanger that improves heat transfer performance by disrupting the flow around the pipes in the - row, and does not result in a significant increase in cost. do.

Structure of the Invention For this reason, the present invention provides fins that are arranged in parallel at regular intervals, are divided into at least two or more in the front and back with respect to the direction of airflow, and are arranged so that adjacent fins in the front and back direction are not arranged on the same plane. a large number of plate-like fins, a large number of pipes passing through these plate-like fins orthogonally, and a large number of pipes on the windward side of the pipes, parallel to the pipes and spaced apart in a direction perpendicular to the flow direction of the wind. and a cylindrical member arranged;
A heat exchanger is provided in which the cylindrical member disturbs the flow around the first row of pipes.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 and 5. Reference numeral 1 indicates a plate-shaped fin, and 2 indicates a pipe.

4 is a fin collar. 5 is a cylindrical member having a cylindrical outer peripheral surface that is arranged in parallel at intervals in a direction crossing the wind flow direction along the windward side edge of the plate-like fin 1; 6 are arranged in a staggered manner with respect to the pipes 2a in the -th row. In the above configuration, when air flows in the direction of arrow (A), the cylindrical member 5 disturbs the flow at its trailing portion, creating a vortex as shown by the arrow. As a result, the flow around the pipes 2a in the first row is disturbed, the heat transfer performance around the pipes 2 is improved, and the performance as a heat exchanger is greatly improved. Although the ventilation resistance increases slightly by providing the cylindrical member 6, most of the ventilation resistance of the heat exchanger consisting of the plate-shaped fins 1 and the pipes 2 is accounted for by the friction loss of the plate-shaped fins 1. The resistance due to the shape of the member 5 does not become so large.

Effects of the Invention According to the heat exchanger of the present invention, as is clear from the above description, the cylindrical member disposed on the windward side completely disturbs the flow around the pipe located on the windward side, reducing the heat around the pipe. It has the advantage that the heat transfer can be increased, the heat transfer performance of the heat exchanger can be greatly improved, and the ventilation resistance does not become too large.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional heat exchanger, Fig. 2 is a vertical sectional view of the same heat exchanger, Fig. 3 is a sectional view taken along the line ■-■ of Fig. 2, and Fig. 4 is an embodiment of the present invention. A sectional view of a heat exchanger showing an example, FIG. 6 is a sectional view taken along the line V-V in FIG. 4. 1°°゛°°゛Plate fin, 2°゛°°°°pig, 2
N-------Row pipe, 5...Cylindrical member. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4 ^ Stomach rR o man b evil

Claims (1)

[Claims] ■ The fins are arranged in parallel at regular intervals, are divided into at least two or more in the front and back with respect to the direction of air flow, and are arranged so that adjacent fins in the front and back direction are not arranged on the same plane. A large number of plate-shaped fins, a large number of pipes passing through these plate-shaped fins, and a large number of plate-shaped fins arranged on the windward side of the plate-shaped fins in parallel with the pipes and at intervals in a direction intersecting the flow direction of the wind. A heat exchanger comprising a cylindrical member. (2) The heat exchanger according to claim 1, wherein the cylindrical members are arranged in a staggered manner with respect to adjacent pipes.