JPS6249707B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a housing structure for an induction heating cooker that is incorporated into a cooking unit such as an oven. The present invention provides a housing structure that can deal with electromagnetic interference specific to cooking appliances.

Conventionally, in the case of this type of built-in induction heating cooker, in order to achieve a sense of unity with the oven or cabinet in which it is built, it has been desired to minimize the installation space as much as possible. It was extremely difficult to add a cooling space or a heat insulating structure to the cabinet side in order to cool the cabinet and shield it from heat sources such as the oven below. Therefore, it was necessary to equip the induction heating cooker itself with an internal cooling structure and to adopt a housing structure that takes into account heat shielding from the lower oven.

In addition, induction heating cookers generate unnecessary noise in their internal circuits and lead wires due to the influence of the high-frequency magnetic field they generate, and there has been a particular desire to reduce these electromagnetic interferences.

The present invention aims at cooling the above-mentioned internal and external heat by providing a ventilation passage with high cooling efficiency between the internal chassis and the bottom plate of the main body housing of the induction heating cooker. This is intended to prevent the above-mentioned electromagnetic interference by providing wiring space.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIGS. 1, 2, and 3, reference numeral 1 denotes a main body of a cooker unit with an oven, and has a top plate 2 on its upper surface.

Reference numeral 3 denotes an induction heating cooker body, which is detachably installed in an opening 4 provided in the top plate 2. 5
is another cooking device such as an electric heater, which is also incorporated into the top plate 2.

In Figures 2, 3, and 4, 6 is the top plate of the induction heating cooker, and 7 is the top plate 6.
It is a support frame body that fixes the peripheral edge of the induction heating cooker main body 3 on the top plate 2 at the same time.

The support frame 7 is provided with ventilation holes 8, 9, 10, and 11 on each side for cooling the inside of the main body.
Reference numeral 12 denotes a main body casing, which has a concave main body bottom 13 on the bottom surface. A ventilation hole 14 is provided in the center of the main body bottom plate 13.

A metal flat chassis 15 is held with a predetermined gap in between the bottom plate 13 of the main body, and has a high frequency power supply device 16 on its upper part. Further, a cooling fan 17 is attached to the center of the flat chassis 15 so as to pass through the chassis. 18 is a through hole. Further, a plurality of other ventilation holes 1 are provided around the flat plate chassis 15.
9 and 20 are formed to allow ventilation of cooling air around the flat plate chassis 15.

21 is a heating coil, and 22 is a power receiving plug which is connected to a power supply socket 23 provided in the top plate opening 4 of the main body 1 of the cooking unit with oven.
24 is an oven roasting chamber built into the lower part and has a heater 25 inside. Reference numeral 26 denotes a ventilation passage 27 formed between the flat chassis 15 and the main body bottom plate 14.
The power receiving plug 22 and the high frequency power supply device 16 are bonded together using a power supply lead wire attached to the power supply lead wire. 28 is an inner wall of the top plate opening 4.

Now, the cooling operation during use of the oven-equipped cooker unit constructed as above will be explained.

First, when the power of the induction heating cooker body 3 is turned on, the cooling fan 17 is activated, and as shown in FIG. After cooling the high frequency power supply device 16, one of the through holes 1 of the flat chassis 15 is cooled.
8, and the other flows into a plurality of ventilation holes 19 and 20 at the periphery of the flat chassis 15. Now, the cooling air that has passed through the plurality of ventilation holes 19 and 20 is guided to the cooling fan 17 through the ventilation path 27 formed by the flat chassis 15 and the main body bottom plate 13, and is guided to the cooling fan 17.
The cooling air is discharged from the central vent hole 14 of the main body bottom plate 13 to the outside of the device together with the cooling air from the through hole 18 of No. 5. Further, as shown in FIG. 3, the discharged air is guided to the inner wall 28 of the top plate opening 4 of the main body 1 of the cooker unit with oven, and is guided to the vent hole 10 of the support frame 7,
11 and is discharged to the outside of the unit. At this time, if the inner wall 28 of the top plate opening 4 does not have a sealed structure as shown in FIG. 3, the cooling air is freely discharged through the gap in the inner wall surface.

As described above, in this cooling mechanism, the intake cooling air is not only transmitted through the through hole 18 near the cooling fan 17, but also through the plurality of ventilation holes 19 and 2 in the peripheral area.
Since the air is also ventilated from the flat plate chassis 15, the high frequency power supply device 16 disposed on the flat chassis 15 can be cooled evenly. Therefore, it is possible to reduce the occurrence of insufficiently cooled areas, which has traditionally been a problem with this type of cooling structure, and the cooling efficiency can be greatly improved.

Further, as described in the above configuration, the bottom of the induction cooking device main body 3 is formed with a gap between the flat plate chassis 15 and the main body bottom plate 13, and this gap serves as the ventilation path 27 for the cooling air. The existence of this ventilation passage 27 not only cools the inside of the main body but also prevents heat influence from the outside. This is because, as in this embodiment, there is an oven roasting chamber 24 at the bottom.
In the case of the oven-equipped cooker unit main body 1 having the above, there is a problem that the heat from the heater 25 in the oven roasting chamber 24 is transmitted to the induction heating cooker main body 3, causing an increase in internal temperature. 3 is not operating, the cooling fan does not operate, so the effect is significant. Therefore,
As mentioned above, in this structure, the flat chassis 1
Since a ventilation passage 27 is provided in the lower part of the oven 5 to form an air insulation layer, heat from the oven roasting chamber 24 can be shielded. Of course, while the induction heating cooker body 3 is in operation, cooling air flows into the ventilation passage 27, so that the shielding and heat insulation effect is further improved.

Next, a mechanism for preventing electromagnetic interference, which is another object of the present invention, will be explained.

As described in the above configuration, the power supply lead wire 26 can be routed through the ventilation passage 27 of the flat chassis 15 and the main body bottom plate 13 as shown in FIGS. 2 and 3. When placed in the section, the power supply lead 26 connects to the flat chassis 15.
It is electrically shielded from the high frequency power supply 16 by.

In other words, the above configuration provides a housing structure that is effective against electromagnetic interference.

As is clear from the above description of the embodiments, the present invention provides a through hole 1 in which a cooling fan 17 is attached to a flat chassis 15 inside the induction heating cooker main body 3.
9 and 20 are provided, and a flat chassis 15 and a main body bottom plate 13 are provided.
By providing a space between the two and allowing ventilation from both directions of the through hole 18 and the plurality of ventilation holes 19 and 20, the internal cooling efficiency of the induction heating cooker main body 3 is improved, and the inner cooling efficiency of the induction heating cooker main body 3 is improved. A ventilation passage 27 between the flat chassis 1 and the main body bottom plate 13 is used to insulate and shield heat from an oven etc.
By using this as a housing portion for the power supply lead wire 26, it can be electrically shielded from the high frequency power supply device 16 and has great effects such as being able to prevent electromagnetic interference.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a cooker unit with an oven incorporating an induction heating cooker according to an embodiment of the present invention, and Fig. 2 is a perspective view of the cooker unit shown in Fig. 1.
3 is a sectional view taken along the line B-B' in FIG. 1, and FIG. 4 is a sectional perspective view of a main part of the induction heating cooker body. 3... Induction heating cooker main body, 13... Main body bottom plate, 15... Flat plate chassis, 16... High frequency power supply device, 17... Cooling fan, 18... Through hole, 1
9, 20... Multiple ventilation holes, 26... Power supply lead wire, 27... Ventilation path.

Claims (1)

[Scope of Claims] 1. A flat plate chassis equipped with a high frequency power supply device is formed inside the induction heating cooking device main body, a through hole is formed in the flat plate chassis, a cooling fan is disposed adjacent to the through hole, and the A plurality of ventilation holes are formed around the flat chassis, and a main body bottom plate is provided on the back side of the flat chassis through a predetermined gap, and one of the ventilation holes of the cooling fan is directed to the through holes of the flat chassis, and the other is provided with the main body bottom plate through a predetermined gap. An induction heating cooker with multiple ventilation holes in a flat chassis. 2. The induction heating cooker according to claim 1, wherein a wiring material for the high frequency power supply device is provided in a gap between the flat plate chassis and the main body bottom plate.