JPS5869396A - Heat exchange plate for use in heat exchanger - Google Patents

Abstract

PURPOSE:To improve the heat exchange efficency of the titled heat exchange plate without increasing the number of raised sections to be formed by shaving-up the surface of the plate by a method wherein the upper surface of the raised sections are corrugated in such a manner that the corrugations of one raised section are made aslant with respect to those of another and with respect to the flow direction of air. CONSTITUTION:The raised sections 2a and 3a of the heat exchange plate 1 are expanded at the time of their raising and the upper surfaces 2a' and 3a' of the raised sections 2a and 3a are corrugated veritically and also corrugated gently sidewardly. Thus, by the formation of such corrugations, it is possible to obtain a larger surface area of heat transfer for the same space and to bring the heat exchange plate into favorable contact with an air stream to thereby improve the heat exchange efficiency of the heat heat exchange plate. Further, as regards the resistance against ventilation, the flat upper surfaces 2a' and 3a' of the raised sections 2a and 3a are corrugated sidewardly by shaving-up the surface of the heat exchange plate slightly aslent from the direction normal to the flow direction of air in order to make them contact smoothly with the air stream so that the heat exchange efficiency of the heat exchange plate can be improved without substantially increasing the resistance against ventilaton.

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 6 are cut and raised parts, and the heat exchange plate 1 is designed to increase the surface area of the heat exchange plate 10, improve contact with the air flow, and increase the heat exchange rate.
It is formed by making a cut in the hole and raising the cut portion. 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 as a heat exchanger, the flow of air against the heat exchange plate 1 is similar to that shown in the figure, and exchanges heat with the fluid within the vibrator 4.

However, it is not possible to provide too many such cut-and-raised portions 2 and 6 due to machining and the strength of the heat exchange plate 1, and the improvement in heat exchange efficiency by the cut-and-raised portions 2 and 6 has reached its limit. was. This also means that it cannot cope with the recent trend in power consumption and consumption sources (miniaturization) of the VRC.

The object of the invention is to overcome the above-mentioned drawbacks.

In other words, in order to increase 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 shape of a cut plate is made to improve the contact between the cut part and the air flow. The objective is to increase the heat exchange rate and reduce the size of the equipment by increasing the heat exchange rate.

That is, in the present invention, the cut-and-raised portions 2a and 6a of the heat exchange plate 1 are extended at the time of standing up, and the upper surface portions 2a and 6a' of the cut-and-raised portions 2a and 6a are made vertically corrugated and also horizontally. By shaping it into a gentle waveform, it is possible to obtain a large heat transfer area in the same space, and
It improves the contact with the air flow and greatly improves the heat exchange rate. In addition, for the through-hole resistance, cut and raise portions 2a and 3a slightly diagonally from the direction perpendicular to the direction A of the nozzle.
The planar portions 2a and 6a are formed into horizontal waveforms 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 is shown in FIGS. 6 and g4 below, and the upper surface portions of the cut-out portions 232 and 6a are formed to have a gentle inclination in the transverse direction with respect to the wind direction A. The lateral inclinations of the portions 2a' and 6a' are formed alternately in different directions so that the plurality of cut-and-raised portions 2a and 6a mutually form a lateral waveform. In this way, the surface area of the cut-and-raised portions 2a and 6a is approximately 2
It has been doubled to increase the surface area by 20 percent as a heat exchange plate. Furthermore, the cut-and-raised portions 2a are arranged in order with respect to the wind direction A.
・The upper and lower waveforms of the upper surface parts 2a and 6a of 6a are made oblique with respect to the wind direction A so that the adjacent cut-and-raised parts 2a and 6a also form a waveform in the lateral direction, so that the air flow B becomes a waveform. This improves contact with the cut-and-raised portion 2a3a. 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 before, leading to a higher power consumption ratio. 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 required, leading to an attenuation source, and there is also the effect that the main body of equipment such as a room air conditioner can be made smaller. In FIG. 6, the waveform is formed by providing a large number of triangular sawtooth peaks, but the waveform may be formed into a semicircle or the like to increase the surface area. If a slight increase in ventilation resistance is acceptable, tilt the surface of the cut-and-raised part in the bending direction so that the airflow forms a waveform both up and down.
By twisting the airflow into a spiral shape, the heat exchange rate 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 entire heat exchange plate is increased by approximately 20%, and the upper and lower surfaces of the plurality of cut-and-raised portions are corrugated. 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%, which saves power. I was able to turn it into Furthermore, when the amount of heat exchanged is the same, the size of the heat exchanger can be reduced by 1515%, so the amount of materials can be reduced.

[Brief explanation of drawings]

No. 11 is a front view of a conventional heat exchange plate having cut-and-raised portions, FIG. 2 is a side view of FIG. 1, and FIG. FIG. 4 is a side view of FIG. 5. DESCRIPTION OF SYMBOLS 1... Heat exchange plate, 2, 2a-5, 6a... Cut-and-raised part, 2a', 33'... Top surface part, 4... Heat exchange pipe, 5... Curl part, A ...Wind direction of air flow, B...
・Air flow. Figure 1 Figure 3 Kunifu Figure 2 Figure 4

Claims (1)

[Claims] 1. In the heat exchange ti, (1) of a cross-fin tube heat exchanger, which is constructed by inserting and superimposing multiple heat exchange plates (1) on a heat exchange vibrator (4), the heat exchange plate (1) is A plurality of long cut-out portions (2a-3a) are formed in a direction perpendicular to the wind direction (A) of the passing air flow, and the cut-out portions (2a) and (6a') are extended. (2a)
・(3a) is waveformed up and down and air flow - (H)
A plurality of cut-and-raised portions (2a
). A heat exchange plate for a heat exchanger, characterized in that the upper and lower wave shapes of (6a) are formed obliquely to each other with respect to the wind direction (A).