JPS6331513Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an induction heating device equipped with a plurality of heating coils.

In this type of device, a top plate is disposed at the upper opening of the case, and a plurality of heating coils are disposed at the lower surface of the top plate. by the way,
A pot, etc. is placed on the top plate for each heating coil, so if the gap between each heating coil is narrow, the gap between the pots placed on the top plate will also be narrow, making it difficult to use. There is a problem. Therefore, the gap between each heating coil must be relatively wide, so that if, for example, four heating coils are disposed on the underside of the top plate, the surface area of the top plate becomes considerably large. On the other hand, each of the heating coils is driven by various electrical components such as power transistors. Conventionally, these electrical components have been arranged in a suitably dispersed manner inside the case.

However, in the case of the conventional structure described above, since the internal space of the case is large, it is difficult to effectively cool the heating coil and various electric components disposed inside the case. Therefore, it may be possible to install multiple fans in the case, but
In this case, the internal structure of the case would be complicated and the cost would be high.

This idea was devised in consideration of the above circumstances, and its purpose is to create a mounting area for multiple containers to be heated on the top plate, even when multiple heating coils are installed inside the case. An object of the present invention is to provide an induction heating device that can effectively cool the inside of a case with a single fan.

An embodiment of this invention will be described below with reference to the drawings. Figure 1 shows the external appearance of the induction heating device. 1 is a case, 2 is a top plate attached to the upper opening of the case 1, and 3 is a top plate 2.
This is an operation panel arranged in parallel on the upper part of the case 1. As shown in FIG. 2, a suction port 4 is formed in one side plate of the case 1, and an exhaust port 5 is formed in the other side plate facing the one side plate. Further, on the lower surface of the top plate 2, four heating coils 6 are arranged at appropriate intervals in the front, rear, left and right directions. Furthermore, as shown in FIG. 3, a fan 7 is provided at approximately the center of the case 1 to guide air downward. This fan 7
is attached to a top opening 9 formed at one end of a box-shaped exhaust duct 8. The other end of the exhaust duct 8 communicates with the exhaust port 5 of the case 1. Furthermore, various electrical components for driving each heating coil 6 are installed inside the case 1. These electrical components include, for example, power units 10, 10 in which power transistors and the like are incorporated and which are in a relatively high temperature state when energized, and other electrical component units 1.
It is formed from 1... As shown in FIG. 4, the power units 10, 10 are formed with a large number of ventilation holes 12 extending upward and downward.
Each power unit 10, 10 has a fan 7.
They are arranged on both sides of the duct and are attached on the suction duct 13, which will be described later. Further, the electrical component units 11 are appropriately arranged around the fan 7. The suction duct 13 has one end communicating with the suction port 4 of the case 1, and the other end extending to sandwich one end of the exhaust duct 8 from both sides, as shown in FIG. A pair of extension parts 14,1
4 are provided. And each extension part 14,1
Openings 15, 15 are formed in the upper surface of the power unit 4, respectively, to face the respective power units 10, 10 from below.

Therefore, in the case of the above configuration, fan 7
When the case 1 is rotated, external air is introduced into the case 1 through the suction port 4. Air sucked into the case 1 from the suction port 4 is guided by the suction duct 13 and sent out from both openings 15, 15 toward each power unit 10, 10. The power units 10, 10 are cooled when the air sent through the openings 15, 15 passes through the ventilation holes 12. Further, the cooling air rising through each ventilation hole 12 is blown onto each heating coil 6, thereby cooling each heating coil 6. Also, the air inside the case 1 is heated by the fan 7 through heat exchange with each electric component unit 11..., the power unit 10, 10, and each heating coil 6... arranged inside the case 1. The gas is then fed into the exhaust duct 8, guided through the exhaust duct 8, and discharged to the outside from the exhaust port 5.

Thus, in the case of the above structure, the outside air drawn into the case 1 is guided through the suction duct 13 to approximately the center of the case 1, and the power units 10, 10, which are likely to reach a high temperature state when energized, and each heating element are guided through the suction duct 13. By spraying the air onto the coils 6, the power units 10, 10 and each heating coil 6 can be effectively cooled. Further, air inside the case 1 heated by heat exchange with each electrical component unit 11..., power unit 10, 10, and each heating coil 6... is effectively discharged to the outside of the case 1 by a fan 7. Therefore, the cooling efficiency within the case 1 can be significantly increased compared to the conventional case. In addition, since it is only necessary to provide a single fan 7 in the case 1, the internal configuration of the case 1 can be simplified and costs can be reduced compared to a case that uses multiple fans. .

It should be noted that this invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of this invention. for example,
The number of heating coils arranged on the bottom surface of the top plate 2 is not necessarily limited to four,
There may be a plurality of numbers other than four. In this case, as the number of heating coils increases, the cooling efficiency can be significantly increased compared to a case where a large number of heating coils are arranged in parallel.

As explained above, according to this invention, a plurality of containers to be heated are placed on the top plate, and even when a plurality of heating coils are installed in the case, the heating coils are guided through the suction duct. The cooled air can be blown directly onto various electrical components such as the power unit, and the air heated through heat exchange with the various electrical components inside the case is discharged to the outside of the case via the exhaust duct. Therefore, the interior of the case can be effectively cooled by a single fan.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, in which Fig. 1 is a perspective view showing the external appearance of the induction heating device, Fig. 2 is a side view of the same, and Fig. 3 is a cross-sectional view showing the internal structure of the induction heating device. , FIG. 4 is a sectional view taken along the line -- in FIG. 3, and FIG. 5 is an exploded perspective view of the main parts. 1...Case, 2...Top plate, 4...
Suction port, 5...Exhaust port, 6...Heating coil, 7...
...Fan, 8...Exhaust duct, 9...Top opening, 10...Power unit, 13...Suction duct, 15...Opening.

Claims (1)

[Scope of utility model registration request] In the induction heating device, a plurality of placing parts for containers to be heated are formed on a top plate attached to an upper opening of the case, and heating coils are respectively arranged on the lower surface of each of these placing parts. A suction port and an exhaust port are respectively formed in the case, and the other end of an exhaust duct whose one end is connected to the exhaust port extends to a substantially central portion within the case, and is formed at the extending end of the exhaust duct. A fan for sucking the air inside the case into the exhaust duct is attached to the top opening, and a power unit for each of the heating coils is arranged around the fan, and one end is connected to the suction port. The other end of the suction duct connected to the fan is extended to the lower side of the power unit, and as the fan is driven, suction is drawn from the suction port to a portion of the extended end of the suction duct that faces the power unit. An induction heating device characterized in that an opening is formed for introducing air sucked into the duct into the case.