JPS58218788A - Induction heating cooking device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to cooling of an induction heating cooker.

The heating coil used in the induction heating cooker is placed on the top plate and generates an eddy current in the pan, and the temperature rises due to the heat radiated through the top plate and the self-heating of the heating coil. The temperature of the heating coil is likely to rise when cooking with oil, where the pot temperature rises, or when the watt density of the heating coil is large and the ratio between the size and output of the heating coil is large.

In FIGS. 1 and 2, a box-shaped chassis 4 is provided inside the outer casing 1 and connects an intake port 2 and an exhaust port 3 provided in the outer casing 1 with a duct structure. A cooling fan 5 is placed at a proper location on the chassis 4. A heating coil 6 is fixed to a coil base 7 and placed above the box-shaped shear 74.

In addition, since there is a gap between the outer casing 1 and the top grate 8 and the surroundings of the box-shaped chassis 4, the warm air inside the outer casing 1 from the exhaust port 3 side circulates through this gap to the intake port 2 side. do. Therefore, sufficient cooling of the components 9 placed in the box-shaped chassis 4 cannot be expected. Therefore, we have installed shields at appropriate locations to completely eliminate the gaps between the outer casing 1 and top plate 8 and the periphery of the component fixing base 4. 1
Suppose that 0 is applied. In this case, there is no air circulation inside the outer casing 1, so the parts 9 placed in the box-shaped chassis 4 are removed.
cooling is sufficient.

However, the heat of the heating coil 6 is transmitted through the coil paste 7 and radiated only from the back surface thereof. As a result, the cooling of the heating coil 6 becomes very poor, and it is necessary to provide a heat insulating material to prevent the heat generated by the pot 11 placed on the top plate 8 from being transmitted to the heating coil 6 and causing the temperature to rise.

However, the present invention provides heating coil 6 by means described below.
can be cooled well.

A shield jO is provided closer to the exhaust port 3 than the heating coil 6,
A predetermined gap IL between the top plate 8 and the shield 10
will be established.

With this configuration, cooling air is sucked through the intake port 2 and sent to the exhaust port 3 side by the cooling fan 6. Since the exhaust port 3 has exhaust resistance, the exhaust port 3 inside the outer casing 1
Comparing the surrounding air and the outside air, the pressure near the exhaust port 3 is higher. Therefore, most of the air inside the container is exhausted through the exhaust port 3 as shown by the arrow, but a portion is circulated to the intake port 2 side through the gap a'l' between the top plate 8 and the shield 10.

During this process, air flows between the top plate 8 and the heating coil 6, so that the heating coil 6 is cooled.

As the gap a becomes larger, the amount of air that circulates increases, and the cooling function of the components 9 arranged in the box-shaped chassis 4 deteriorates.

However, if the gap 2L is made narrower than the gap between the top plate 8 and the heating coil 6, the amount of circulating air can be reduced, and the cooling function of the components 9 arranged in the box-shaped chassis 4 will not deteriorate much. Furthermore, the circulating air flows intensively between the top plate 8 and the heating coil 6, and the flow rate is also relatively fast like a draft, so only the heating coil 6 is locally cooled. It is a very effective means of cooling, and no insulation is required.

As explained above, the present invention provides a shield between the component fixing base closer to the exhaust port than the heating coil, the outer casing and the top grate, and a predetermined distance between the lower surface of the top plate and the shield. By providing a gap, the heating coil can be cooled very effectively.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an induction heating cooker according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line A--A in FIG. 1...outer casing, 2...intake port, 3...
...Exhaust port, 4...Box-shaped chassis, 6...
...Cooling fan, 6...Heating coil, 7...
... Coil base, 8 ... Top grade, 9 ... Parts, 10 ... Shielding body, 11
······pot.

Claims (2)

[Claims] (1) Has a fan and a box-shaped chassis inside the external casing,
The box-shaped chassis constitutes a duct between an intake port and an exhaust port provided at appropriate positions in the outer casing, and the fan faces into the opening of the box-shaped chassis and is connected to the upper surface of the outer casing. A heating coil is provided between the top plate constituting the top plate and the upper surface of the box-shaped chassis, and a shield is provided in a gap between the box-shaped chassis and the outer casing of the container on the exhaust side of the potash heating coil to close this gap. The induction heating cooker is provided with a shielding body, and the shielding body is provided with a predetermined gap at the bottom surface of the top plate. (2) The induction heating cooker according to claim 1, wherein the gap between the top plate and the shield is equal to or less than the gap between the top plate and the heating coil.