JPS6116629Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a cooling mechanism for an electromagnetic cooker.

An induction cooker uses a switching element, a heating coil,
Configure an inverter circuit with a resonant capacitor, etc.
A heating coil generates a high-frequency alternating magnetic field to inductively heat an iron pot.

In the circuit components of such an electromagnetic cooker, the temperature of the switching element increases significantly due to self-heat generation, and the heating coil increases in temperature due to self-heat generation, conduction heat from the pot, radiant heat, etc., and requires cooling. In particular, switching elements are semiconductor elements and may be adversely affected by heat. For this reason, conventionally, a switching element is provided with a heat dissipation fin, and the heat dissipation fin is cooled by blowing air onto the heat dissipation fin.

However, since multi-burner electromagnetic cookers are provided with a large number of switching elements and heating coils, the amount of heat generated is even greater, and a more effective cooling method has been desired.

The present invention was developed in view of the above points, and an air passage is formed by a U-shaped substrate and a heating coil fixed to the open end of this substrate, and a switching device is installed in the air passage. By arranging the elements and blowing air into the air passage by a fan, the switching elements and other electrical parts can be efficiently cooled.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
Figure 1 shows a four-wheel drive system using the cooling mechanism according to this embodiment.
Fig. 2 is a cutaway top view of the main parts of the electromagnetic cooker, and Fig. 2 shows a sectional view taken along line A-A' in Fig. 1;
Heating coils 6, 7, 8, and 9 are provided at diagonal positions of the rectangle directly under the top plate 5 made of rectangular ceramic or the like, respectively.
This is an L-shaped component board on which electrical components 10, 10, . . . that constitute inverters corresponding to numbers 2, 3, and 4 are attached. Here, a pair of substrates 6, 8 are arranged to face each other to form a substantially U-shape, and the heating coils 1, 3 are inserted into the upper openings of the component substrates 6, 8 forming this U-shape. An air passage 11 is formed by the component boards 6 and 8 and the heating coils 1 and 3, which are arranged substantially horizontally so as to be closed. Similarly, another set of substrates 7, 3 and heating coils 2, 4 form an air passage 12. 13, 14, 15, and 16 are switching elements S1, S2, S3, and S4 that control the current flowing through the heating coils 1, 2, 3, and 4, respectively.
The heat radiation fins 13 and 15 are provided in parallel in the air passage 11, and the radiation fins 14 and 16 are provided in parallel in the air passage 12. Reference numerals 17 and 18 indicate fans for blowing air into the air passage 11 and the air passage 12, respectively, and these fans are disposed substantially in the center of the electromagnetic cooker so as to face each other from the back.
Incidentally, the intake port of this electromagnetic cooker is the fan 17,
18, and the exhaust port is in the air path 1.
It is bored on the side of the electromagnetic cooker on the leeward side of Nos. 1 and 12.

In such an electromagnetic cooker, when the fan 17 is rotated, outside air is sucked in from an intake port provided at the bottom of the cooker directly below the fan 17. At this time, switching elements S1, S3, heat radiation fins 13, 1
5. If the wind hits the electrical components 10, 10, etc., the flow of the wind will be disturbed, but since the air path is formed by the component boards 6, 8 and the heating coils 1, 3, the wind will not flow through the air path 1.
1 It is discharged from the exhaust port on the side of the cooker without leaking to the outside. Although this example describes the case where the fan 17 is rotated, the same flow of air as described above occurs in the air passage 12 also when the other fan 18 is rotated.

As mentioned above, the cooling mechanism of the electromagnetic cooker of the present invention forms an air path by a U-shaped substrate and a heating coil fixed to the U-shaped end of this substrate. A switching element is provided inside the device, and the switching element, heating coil, and electrical components are simultaneously cooled by rotating a fan and sending air through the air path, so that the switching element and other electrical components are not affected by the air. Even if the air flow is disturbed, the switching element and other electrical components can be efficiently cooled without air leaking from the air path, reducing the burden on the switching element due to heating, and reducing the length of the element. It is possible to measure the lifespan and increase the output of the electromagnetic cooker.

[Brief explanation of the drawing]

Figure 1 is a cutaway top view of the main parts of a 4-burner cooker that employs the cooling mechanism of the present invention, and Figure 2 is A--A in Figure 1.
It is an A′ cross-sectional view. 1, 2, 3, 4... heating coil, 6, 7, 8,
9... Component board, 10, 10... Electrical component, 1
1, 12... Wind path, 13, 14, 15, 16...
Heat dissipation fin, 17, 18...Fan, S1, S
2, S3, S4...Switching element.

Claims (1)

[Scope of utility model registration request] In the cooling mechanism of an electromagnetic cooker that cools a heating coil and a switching element that controls the current supplied to the heating coil, there is a circuit board arranged in a substantially U-shape with electrical components attached to the inner surface, and a U-shaped circuit board. A heating coil fixed to the upper end opening forms an air passage, the switching element is provided in the air passage, and a fan is rotated to blow air into the air passage, whereby the switching element, the heating coil, A cooling mechanism for an electromagnetic cooker, characterized in that electrical components are simultaneously cooled.