JPS5854797Y2 - induction heating cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a chassis for mounting high frequency power circuit components of an induction heating cooker.

Conventionally, induction heating cookers have a heating coil that generates magnetic lines of force placed on the bottom surface of a plate for placing objects to be heated, and a high-frequency power circuit component attached to the bottom of the heating coil, as shown in Figure 1. The idea was to install a chassis and provide some kind of magnetic shield plate between the heating coil and the high-frequency power circuit components.

Disadvantages of this case include (1) a separate magnetic shielding structure is required between the heating coil and the high frequency power circuit components;

(2) Chassis mounting screws for high-frequency power circuit components come out on the bottom of the chassis, but since a certain insulation distance is required between the chassis and the exterior case, processing such as step stamping may be required on the exterior case ( (Fig. 1), or the height of the entire device increases.

There were other problems.

The present invention aims to solve these drawbacks, and one embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an embodiment of the present invention.

1 is a heated object mounting plate, and 2 is a heating coil.

4 is a chassis for mounting high-frequency power circuit components, and 5 is an outer chassis.

As shown in the figure, by attaching the high frequency power circuit component 3 to the metal chassis 4 close to the back of the heating coil upside down, the metal chassis 4 serves as a mounting chassis for the high frequency power circuit component. , serves the purpose of magnetic shielding plate of heating coil.

Further, the metal chassis 4 and the outer chassis 5 are electrically connected, and the high frequency power circuit components are completely shielded by the chassis and the outer chassis.

With the above chassis configuration, the following effects can be obtained.

(1) Since the chassis itself plays the role of a shield plate, there is no need for a separate shield structure as in the past, which reduces costs, and at the same time shields the magnetic flux from the heating coil and the high-frequency power circuit inside the chassis. It has the effect of shielding interference waves to the outside of the component.

(2) The high frequency power circuit component mounting screws are located on the top of the chassis.
In other words, since the heating coil comes out on the bottom surface, there is no need to perform steps or other processing on a part of the outer chassis in order to maintain an insulating distance between the screws and the outer chassis, unlike in the past. , it is possible to reduce the height of the entire device.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a conventional induction heating cooker, and FIG. 2 is a side sectional view of an induction heating cooker showing an embodiment of the present invention. 1... Heated object mounting plate, 2... Heating coil, 3... High frequency power circuit components, 4...
...Chassis, 5...Outer casing shear, 6...
...shield plate.

Claims (1)

[Scope of utility model registration request] Induction heating is achieved by attaching high-frequency power circuit components from the back side to a flat metal chassis for magnetic shielding provided close to the back side of the heating coil, and electrically bonding the metal chassis and the outer chassis. Cooking device.