JPH0145531B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a heat panel type heat exchanger that uses the principle of a heat pipe and is used in a horizontal state such as in floor heating, and a method for manufacturing the same. (Background Art) Conventionally, in a heat exchanger using a heat pipe, as shown in FIG. 1, it has been necessary to provide a wick 3 on the inner surface of the heat pipe 2 in order to return the condensed working fluid 1 to the heating section. And this heat pipe 2
However, especially when used in a horizontal state, the circulation of the hydraulic fluid 1 requires the intervention of the wick 3. Figure 2 A to D show examples of various types of wicks 3 provided inside the heat pipe 1, where A is a wick with a wire mesh structure, B is a wick filled with fine particles or sintered particles, and C is a crescent moon. Heat pipe 2 has a wavy wire mesh shape, and the cost of heat pipe 2 is almost that of heat pipe 3.
There was a problem in that the processing of the hydraulic fluid 1 and the filling of the hydraulic fluid 1 accounted for the high manufacturing cost. (Object of the Invention) The present invention was proposed in view of the above points, and its main purpose is to provide a heat exchanger that is easy to manufacture, has low manufacturing cost, and has high thermal efficiency, and a method for manufacturing the same. There is something to do. (Disclosure of the Invention) The present invention will be described below with reference to the drawings. FIGS. 3A and 3B show an embodiment of the present invention. In the figure, reference numeral 11 denotes a heat exchanger according to the present invention, which includes a main body 12 constructed by press-welding two metal plates made of a material such as aluminum, and a heat medium provided on one side of the main body 12. It is mainly composed of a closed circuit 13 through which. The closed circuit 13 is formed by coating a metal plate with an anti-crimping material. A heating header pipe 14 is provided to pass through the header portion 13a. The inside of the closed circuit 13 is evacuated and sealed so that the header pipe 14 is immersed in the working fluid. Further, the closed circuit 13 is provided with a plurality of channels 13b which are branched from the header portion 13a, extend substantially parallel to each other toward the other side of the main body 12, and communicate with each other via a channel 13c on the other side. The flow path 13b is formed in a tapered shape so that the width becomes gradually narrower toward the other side. Therefore, the bottom of the closed circuit 13 is formed to be inclined as will be described later, and experiments show that the angle of inclination is 0.3° or more, preferably when the size of the main body 12 is approximately the size of one tatami mat, for example. In this case, it is preferable to have an inclination of 0.6° to 1.0°, and it is formed to descend from the other side toward the header portion 13a. In operation, when the heating header pipe 14 is heated with a heating source such as electric heat or hot water,
The hydraulic fluid 15 filled in the header section 13a is heated, and the evaporated hydraulic fluid 15 passes through the tapered flow path 13b forming the closed circuit 13 branched from the header section 13a, radiates heat on the surface plate, and condenses. death,
Moreover, due to the slope provided in the closed circuit 13, it returns to the header portion 13a under its own weight, and the circulation is repeated in this manner. 4A and 4B show another embodiment of the heat exchanger according to the present invention, in which the header portion 13a and the heating header pipe 14 are arranged in the center of the main body 12, and the header part 13a and the heating header pipe 14 are arranged in the center of the main body 12, and the header part 13a and the heating header pipe 14 are arranged in the center of the main body 12, and Closed circuit 13
The feature is that the flow path is configured to extend. The bottom of the closed circuit 13 is formed to be inclined so as to protrude from both ends to the center so that the internal working fluid 15 returns to the header portion 13a at the center by its own weight after being cooled. In other words,
In forming the closed circuit 13, as will be described later, the branching channels are printed so that the branching points of the channels are thick and become narrower toward the tips. Note that other configurations, operations, etc. are substantially the same as those of the above-mentioned embodiment. Next, the manufacturing method of the present invention will be explained. First, on a first metal plate such as aluminum whose surface has been cleaned, an anti-crimping material is applied by printing to the part corresponding to the closed circuit 13, and another clean second metal plate is layered and rolled at high pressure. By doing so, the main body 12 is constructed by pressing the parts other than those printed with the anti-crimping material. After that, the circuit of the printed part is expanded by the pressure of high-pressure air, and the inside of the two metal plates, that is, the main body 12
A closed circuit 13 is formed inside. In this case, if the printed shape of the anti-crimping material corresponding to the flow path 13b of the closed circuit 13 is made into a tapered shape, the circuit after expansion becomes a circuit with an inclination toward the header portion 13a, which facilitates self-weight circulation. It is possible to manufacture type heat panels. A heating header pipe 14 is appropriately inserted through the header portion 13a, and a working fluid 15 is injected into the closed circuit 13. (Effects of the Invention) As described above, according to the present invention, in short, an anti-crimping material is partially tapered applied to the portion corresponding to the circuit by printing on one metal plate, and another metal plate is applied to the metal plate. A closed circuit is formed by pressing the heat pipes into contact with each other and inflating the circuit of the printed part with air pressure, and there is no need to provide any wicks, so the cost can be reduced compared to the conventional circulating heat pipe using wicks. Furthermore, since the circuit shape can be easily changed, it is easy to produce a wide variety of products in small quantities. Furthermore, if the main body is formed by squeezing with a press, it is difficult to seal the two upper and lower plates and the reliability of the sealing performance is low, but with this manufacturing method, highly reliable sealing performance can be easily obtained.

[Brief explanation of drawings]

Fig. 1 shows a heat exchanger equipped with a conventional circulating heat pipe, Fig. 2 (a) to (d) show conventional examples of various heat exchangers installed in an improved heat pipe, and Fig. 3 (a) shows a heat exchanger according to the present invention. A plan view of an embodiment of the vessel,
B is a sectional view taken along line A-A' of the same as above, and FIGS. 4A and 4B are other embodiments of the present invention. 11 ...Heat exchanger, 12...Main body, 13...Closed circuit, 13a...Header portion, 13b...Tapered channel, 14...Header pipe, 15...Working fluid.

Claims (1)

[Scope of Claims] 1. A main body formed by joining two metal plates, and a closed circuit in which a hydraulic fluid is sealed, which is formed by coating one of the metal plates with an anti-crimping material. The closed circuit has a header section provided with a heating header pipe, and a flow path branching from the header section and constituting the closed circuit is partially tapered to allow the working fluid to flow through the header section. A heat exchanger characterized by an inclined bottom to allow circulation by its own weight. 2. Applying an anti-crimping material to a part of the hydraulic fluid flow path in a tapered shape in order to form a closed circuit for circulating the hydraulic fluid by printing on one metal plate, and then attaching the other metal plate to the metal plate. A method for manufacturing a heat exchanger, comprising the steps of: pressurizing the printed portion to bulge the printed portion to form the closed circuit.