JPS6244199B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchange plate for a heat exchanger such as an air conditioner, and more particularly to a heat exchange plate provided with cut-out portions suitable for miniaturization with a high heat exchange efficiency.

A heat exchange plate of a conventional heat exchanger provided with cut-and-raised portions will be explained with reference to FIGS. 1 and 2. 1 is a heat exchange plate, 2 and 3 are cut and raised parts, which are cut into the heat exchange plate 1 in order to increase the surface area of the heat exchange plate 1, improve contact with the air flow, and increase the heat exchange rate; The cut portion is formed by standing up. 4 is a heat exchange pipe; 5 is a curled portion provided around the hole for insertion into the heat exchange pipe 4; The heat exchange plate 1 as described above is inserted and overlapped in the axial direction of the heat exchange pipe 4 to constitute a heat exchanger. Further, when the heat exchanger plate 1 is incorporated into a device, air flows in the direction A shown in the figure, and exchanges heat with the fluid in the pipe 4.

However, it is not possible to provide a large number of such cut-and-raised portions 2 and 3 due to mechanical processing and the strength of the heat exchange plate 1, and the improvement in heat exchange efficiency by the cut-and-raised portions 2 and 3 has reached its limit. was. This also means that they cannot keep up with recent trends in power consumption and resource consumption (downsizing).

The object of the invention is to overcome the above-mentioned drawbacks. In other words, in order to improve the heat exchange rate and increase the amount of heat exchange, the surface area of the heat exchange plate is increased more than before, and the cut-out part shape is designed to improve the contact between the cut-out part and the air flow. This aims to improve the heat exchange rate and downsize the equipment by improving the heat exchange rate.

That is, the present invention provides the cut-and-raised portion 2a of the heat exchange plate 1,
3a when starting up, and this cut-and-raised part 2
By shaping the upper surface portions 2a' and 3a' of a and 3a so that they are vertically corrugated and also gently wavy in the lateral direction, a large heat transfer area can be obtained in the same space, and, It improves the contact with the air flow and greatly improves the heat exchange rate. Regarding ventilation resistance, cut and raised portions 2a and 3 slightly diagonally from the direction perpendicular to the wind direction A.
The planar portions 2a' and 3a' of a are shaped to have a horizontal wave shape so that they come into smooth contact with the air flow, thereby improving the heat exchange rate without substantially increasing ventilation resistance.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. 2a' and 3a' are cut-out portions 2a formed to form vertical waves and have a gentle inclination in the lateral direction with respect to the wind direction A.
and 3a, the horizontal inclination of the upper surface portion 2a'3a' is formed alternately in different directions such that the plurality of cut-and-raised portions 2a and 3a mutually form a horizontal waveform. . In this way, the surface area of the cut-and-raised portions 2a and 3a was approximately doubled by forming the upper and lower corrugations, and the surface area of the heat exchange plate was increased by 20%. Further, the upper and lower waveforms of the upper surface portions 2a' and 3a' of the cut-and-raised portions 2a and 3a arranged in order with respect to the wind direction A are adjusted to
3a is diagonal so that it forms a waveform in the horizontal direction,
The cut-and-raised portion 2 is made so that the air flow B has a waveform.
This improves contact with a and 3a. As a result, the heat exchange rate can be greatly improved without increasing the number of cut-and-raised parts using the same material as in the past, leading to lower power consumption. In addition, if the heat exchanger has the same amount of heat exchange, it can be made smaller by that amount, which means less material is needed, leading to resource consumption, and the main body of equipment such as a room air conditioner can be made smaller. In FIG. 3, the waveform is formed by providing a large number of triangular sawtooth peaks, but the waveform may be semicircular or the like to increase the surface area. If a slight increase in ventilation resistance is acceptable, the heat exchange rate can be increased by tilting the surface of the cut-and-raised part in the bending direction so that the airflow has a waveform both up and down, and by twisting the airflow into a spiral shape. It can be greatly improved.

According to the present invention, the surface area of the cut-and-raised portion is increased by 50% by waving the top surface of the cut-and-raised portion vertically, and the surface area of the heat exchange plate as a whole is increased by about 20%. By shaping the shape so that it is oblique to the wind direction A so that the airflow B has a wave shape in the horizontal direction, the heat exchange performance of the heat exchanger can be increased by more than 15% and power consumption can be reduced. Ta. Furthermore, when the amount of heat exchanged is the same, the size of the heat exchanger can be reduced by 15% or more, so the amount of materials can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional heat exchange plate having a cut-out portion, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a front view of a heat exchange plate having a cut-out portion of the present invention. Fourth
The figure is a side view of FIG. 3. 1... Heat exchange plate, 2, 2a, 3, 3a... Cut-out portion, 2a', 3a'... Upper surface part, 4... Heat exchange pipe, 5... Curled part, A... Air flow Wind direction, B
...Air flow.

Claims (1)

[Claims] 1 In the heat exchange plate 1 of a cross-finch tube heat exchanger constructed by inserting and stacking a large number of heat exchange plates 1 in a heat exchange pipe 4, the direction perpendicular to the wind direction A of the air flow passing through the heat exchange plate 1 At the same time, a plurality of long cut-and-raised portions 2a, 3a are formed, and the cut-and-raised portions 2a, 3a are extended to make the cut-and-raised portions 2a, 3a vertically wavy, and the air flow B is wavy in the horizontal direction. A heat exchange plate for a heat exchanger, characterized in that the upper and lower wave shapes of the plurality of cut-and-raised portions 2a and 3a are formed obliquely to each other with respect to the wind direction A.