JPS6019353Y2 - Cooling device for induction heating equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the cooling of an induction heating device, particularly an excitation device, that utilizes heat generated by electromagnetic induction.

Figure 1 shows a conventional low-frequency induction heating device. In the figure, reference numeral 1 indicates a plurality of excitation poles 2 and a common An excitation device consisting of a joint 3, 4 is this excitation device 1
5 is a support for the pot that is protruded from the upper plate 4, 6 is an outer casing that houses the excitation device 1, etc., and has an exhaust port in the soil of the surrounding wall. It has B.

Reference numeral 7 denotes a base plate for internal partition provided within the outer casing, and 10 denotes a blower blade for cooling the excitation device 1, which is disposed within the central blower window 8 of the base plate 7.

11 is a motor for rotating this blower blade 10;
It is suspended from the lower surface of the base plate 7 by an armrest 9.

Reference numeral 16 denotes a cylindrical air blowing guide placed airtightly on the base plate 7, forming a wall surrounding the excitation device 1 located directly above the air blowing window 8.

In the above configuration, when a commercial frequency alternating current is applied to the excitation device 1, an eddy current is induced in the bottom of the pot, generating heat.

During this use, in addition to the heat generated by the exciter 1 itself, it also receives heat from the pot, so the entire exciter is exposed to a considerably high temperature.

Therefore, as a countermeasure to this problem, a method of forcibly cooling the air blower is adopted.

In this invention, the above-mentioned air guide is devised so that cooling by the forced cooling air blower can be carried out effectively, and the specific means thereof will be explained below with reference to FIGS. 2 to 4.

In other words, as a means for effectively utilizing the cooling air by providing a blower guide on the blowing side of the cooling blower, the structure shown in FIG. It is expected that the cooling effect will be improved.

However, in this structure, the air coming out of the central ventilation window 8 exits from the guide at a relatively distance from the outer circumferential surface of each excitation pole 2 of the excitation device 1, and sufficient heat exchange with each excitation pole cannot take place. Not possible.

This invention focuses on this point and, as shown in FIGS. 3 and 4, the shape of the blower guide 16 is not made into a simple cylindrical shape. In addition, a discharge window A is formed in the opposing part of the back of each excitation pole 2, and the cooling air passing between the inner wall surface of the guide and each excitation pole is directed to the outer peripheral surface of each excitation pole. The amount of heat exchanged between the cooling air and each excitation pole 2 is thereby increased.

In addition, as a means of releasing cooling air after heat exchange,
In some cases, the exhaust window A is formed on the upper edge of the blower guide 16 to reduce stagnation of the air after heat exchange, and the cooling of the excitation device 1 is further improved by a combination of these.

As a means for converging the cooling air passing between the inner wall of the blower guide and each excitation pole, the inner wall of the blower guide between the adjacent excitation poles is moved inwardly as shown by the symbol C in Fig. 4. It may also be made to protrude in the opposite direction.

Since this invention is constructed as described above, the cooling air flows along the outer circumferential surface of each excitation pole, improving cooling efficiency and making it possible to use a small blower. It becomes possible to reduce size and weight and production costs.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main part showing the cooling means of the induction heating device, Fig. 2 is a perspective view showing the cooling air guide for the excitation device in the heating device, and Figs. 3 and 4 are examples of the invention. It is a perspective view showing the air blowing guide same as the above. In the figure, 1 is an excitation device, 2 is an excitation pole thereof, 7 is a plywood board on which the excitation device 1 is placed, 8 is a central ventilation window, 16
A is the ventilation guide, A is the cooling air exhaust window installed in this guide,
Similarly, C indicates a protrusion provided on this guide.

Claims (2)

[Scope of utility model registration request] (1) A plurality of excitation poles are arranged around a central ventilation window of plywood that supports an excitation device, and the outer periphery of these excitation poles is surrounded by a cylindrical ventilation guide, and the central ventilation window is In a cooling device for an induction heating device in which air is blown in to cool each excitation pole and then discharged from the air guide, the shape of the air guide is approximated to the arrangement shape of each excitation pole, and the air guide is A discharge window for discharging cooling air is formed in a portion located on the back side of the excitation pole, and the cooling air flowing between each excitation pole and discharged from the discharge window is directed to the outer peripheral surface of each excitation pole. A cooling device for an induction heating device, characterized in that the cooling device is configured to converge along the direction. (2) The inner wall of the air blowing guide between adjacent excitation poles is made to protrude inwardly from each of the guides, so as to increase the density of the cooling air passing between the protrusion and each excitation pole. A cooling device for an induction heating device according to claim 1 of the registered utility model.