JP3024564B2 - Induction heating cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction cooking device.

[0002]

2. Description of the Related Art In recent years, induction heating cookers have been evaluated for high safety, and the total demand tends to increase year by year. However, further improvement in safety is desired.

FIG. 5 shows a conventional induction heating cooker.
It will be described based on. FIG. 5 is a sectional view showing a configuration of a conventional induction heating cooker. A top plate 1 made of crystallized glass on which a cooking vessel is placed is placed on the upper surface of the main body outer frame 2.
Are fixed by the adhesive 4. That is, the upper surface of the main body outer frame 2 is an opening, and the flat top plate 1 is bonded and fixed so as to close the opening. In addition, an induction heating coil 5 for generating a high-frequency magnetic field, a control circuit 6 for supplying a high-frequency current to the induction heating coil 5, and a cooling fan 3 are arranged in the outer frame 2 of the main body.

In the above configuration, the high-frequency magnetic field generated by the induction heating coil 5 is linked to the cooking container placed on the top plate 1, and the cooking container is induction-heated to generate heat. Thus, the food stored in the cooking container is cooked. During this cooking period, the cooling fan 3 is operating, and the housing components such as the induction heating coil 5 and the control circuit 6 are sufficiently cooled.

[0005]

The induction heating cooker having the above-mentioned structure has a possibility that the top plate is broken or a crack is generated near a contact portion between the outer frame of the main body and the top plate. . In other words, for example, when high-temperature cooking such as fried food or grilled food is performed, the main body outer frame 2 supporting the top plate 1 undergoes large thermal expansion by receiving radiant heat from the cooking container. At this time, the top plate 1 is made of crystallized glass, and there is almost no dimensional change due to heat. Since the top plate 1 is fixed to the main body outer frame 2 by the adhesive 4, the top plate 1 receives bending stress due to a dimensional change of the main body outer frame 2. If this stress becomes remarkable due to high-temperature cooking, the top plate 1 is cracked, or cracks are generated near the contact portion between the main body outer frame 2 and the top plate 1.

[0006]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a cooling section for lowering the temperature of resin at a joint between a top plate and an outer frame of a main body. This reduces the stress generated on the plate or the outer frame of the main body.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The invention described in claim 1 includes a body outer frame having a top plate, and a cooling fan disposed within the body, wherein the joint portion between the top plate and the body outer frame Adhesive application part to adhere top plate
In addition, a cooling unit for lowering the temperature of the resin is provided in the vicinity of the adhesive application portion to reduce stress generated on the top plate or the main body outer frame due to thermal deformation of the main body outer frame.

According to a second aspect of the present invention, the cooling portion is formed as a bent portion formed such that a gap between the cooling portion and the top plate is larger than an adhesive application portion for bonding the top plate. The induction heating cooker has a high cooling effect and a high cooling effect.

According to a third aspect of the present invention, by using a rib provided integrally with or separate from the outer frame of the main body as the cooling portion, the air of the cooling fan is blown by the cooling air passage formed by the rib. It is an induction heating cooker that receives efficiently and has a high cooling effect.

[0010]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the structure of this embodiment. A top plate 11 made of an inorganic material such as crystallized glass on which the cooking vessel 15 is placed is placed on the upper surface of the main body outer frame 12.
Are fixed by a joint 13 to which an adhesive is applied. An induction heating coil 17 for generating a high-frequency magnetic field, a control circuit 18 for supplying a high-frequency current to the induction heating coil 17, and a cooling fan 16 are arranged in the main body outer frame 12. Also, the joining portion 13 has a top plate 11 as a cooling portion.
Is formed so that the gap between the bent portion and the top plate 11 is larger than the adhesive applied portion to which the top plate 11 is adhered.

The operation of this embodiment will be described below. When a start button (not shown) is pressed, the control circuit 18 starts operating to start supplying a high-frequency current to the induction heating coil 17. When the high-frequency magnetic field generated by the induction heating coil 17 is linked to the cooking container 15 placed on the top plate 11, the cooking container 15 is heated by induction heating. Thus, the food stored in the cooking container 15 is cooked. During the cooking period, the cooling fan 16 is operating, and the housing components such as the induction heating coil 17 and the control circuit 18 are sufficiently cooled.

At this time, in the present embodiment, the cooling portion is formed at the joining portion 13 of the main body outer frame 12 so that the gap between the top plate 11 and the adhesive applying portion to which the top plate 11 is adhered is larger. A bent portion 14 is provided.
For this reason, the influence of the heat conduction received from the cooking vessel 15 is smaller than that of the conventional joint having a horizontal surface. That is, the temperature of the joint 13 is reduced by the cooling air blown by the cooling fan 16.

As described above, according to this embodiment, the joint 1
3 is provided with a bent portion 14 formed such that a gap between the cooling plate 16 and the top plate 11 is larger than that of the adhesive applied portion to which the top plate 11 is adhered. An induction heating cooker having a high cooling effect is realized. For this reason, the temperature of the main body outer frame 12 can be reduced, cracking of the top plate 11 due to thermal deformation of the main body outer frame 12 and generation of cracks near the joint 13 of the main body outer frame 12 can be prevented, and induction heating cooking can be performed. Safety during use of the container can be improved. Further, according to the present embodiment, since the distal end portion of the main body outer frame 12 is formed as the bent portion 14, the strength of the main body outer frame 12 can be increased.

In this embodiment, the bent portion 14 is used as the cooling portion. However, a crank-shaped portion 20 as shown in FIG. 2 may be used. That is, when the crank-shaped portion 20 is used, a large gap with the top plate 11 can be more positively taken.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a cross-sectional view showing the configuration of the present embodiment, and FIG. 4 is a plan view as viewed from the top.

Reference numeral 21 denotes a top plate made of an inorganic material such as crystallized glass.
It is adhesively fixed on the top with an adhesive. In this embodiment, the main body outer frame 22 is provided with an arc-shaped rib 24 integrally or separately from the main body outer frame 22. That is, the rib 24
Are provided in an arc shape from the cooling fan 26 to the exhaust port 27.

The operation of the embodiment will be described below. The rib 24 functions as a ventilation path for the cooling air sent by the cooling fan 26. In other words, by providing the arc-shaped ribs 24 from the cooling fan 26 to the exhaust port 27, the cooling air blown by the cooling fan 26 efficiently flows through the blowing path formed by the ribs 24. For this reason, according to the present embodiment, the temperature of the joint 23 of the top plate 21 can be reduced, and the thermal deformation of the main body outer frame 22 can be prevented. Therefore, as compared with the first embodiment,
Cracking of the top plate 11 due to thermal deformation of the main body outer frame 12 and generation of cracks near the joint 13 of the main body outer frame 12 can be prevented, and safety during use of the induction heating cooker can be improved. .

Further, according to this embodiment, the strength can be increased by providing the ribs 24 extending from the cooling fan 26 to the exhaust port 27 on the outer frame 22 of the main body. That is, even if a crack occurs in the outer frame 22 of the main body, the joining portion 23
Can be stopped by the ribs 24 arranged in an arc along the line. Therefore, an induction heating cooker with higher safety can be realized.

The ribs 24 used in this embodiment are:
It is not necessary to particularly limit the cross-sectional shape, arrangement position, and the like.

[0021]

Effects of the Invention The invention described in claim 1 includes a body outer frame having a top plate, and a cooling fan disposed within the body, wherein the top plate is at the junction between the top plate and the body outer frame Provide an adhesive application part to adhere
As a configuration in which a cooling unit for lowering the temperature of the resin is provided in the vicinity of the adhesive application portion, stress generated in the top plate or the main body outer frame due to thermal deformation of the main body outer frame can be reduced, and the top plate is cracked or the main body outer frame is broken. The present invention realizes an induction heating cooker that can prevent a crack from being generated near a contact portion with a top plate.

According to a second aspect of the present invention, the cooling portion is formed as a bent portion formed such that a gap between the cooling portion and the top plate is larger than an adhesive application portion to which the top plate is bonded. It is an object of the present invention to realize a high induction heating cooker having a high cooling effect.

According to a third aspect of the present invention, the cooling portion has a rib shape provided integrally with or separately from the outer frame of the main body, and efficiently receives the wind of the cooling fan through the cooling air passage formed by the rib. Thus, an induction heating cooker having a high cooling effect is realized.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of an induction heating cooker according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of another embodiment of the present invention.

FIG. 3 is a sectional view showing the configuration of an induction heating cooker according to a second embodiment of the present invention.

FIG. 4 is a plan view of the same as viewed from above.

FIG. 5 is a sectional view showing a configuration of a conventional induction heating cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Top plate 12 Main body outer frame 13 Joining part 14 Bent shape part 16 Cooling fan 24 Rib

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Fumika Ogasawara 1006 Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-220986 (JP, A) 119890 (JP, A) Japanese Utility Model 5-6788 (JP, U) Japanese Utility Model 61-53889 (JP, U) Japanese Utility Model 63-14393 (JP, U) (58) Field surveyed (Int. ⁷ , DB name) H05B 6/12

Claims (3)

(57) [Claims] And 1. A body outer frame having a top plate, and a cooling fan disposed within the body, the top plate is at the junction between the top plate and the body outer frame adhesive
An induction heating cooker provided with an adhesive application section that performs cooling, and a cooling section that reduces the temperature of the resin near the adhesive application section . 2. The induction heating cooker according to claim 1, wherein the cooling unit is a bent portion formed such that a gap between the cooling unit and the top plate is larger than an adhesive application unit for bonding the top plate. 3. The induction heating cooker according to claim 1, wherein the cooling unit has a rib shape provided integrally with or separately from the outer frame of the main body.