JPH0665131B2 - Induction heating cooker - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooker in which internal parts are forcibly cooled by a cooling fan.

2. Description of the Related Art In general, induction heating cookers are often placed on a table and used. Therefore, if the body of the induction heating cooker is thick, the position of the pan placed on the induction heating cooker becomes high, and the usability becomes poor. Therefore, there has recently been a demand for thinner induction heating cookers.

A conventional induction heating cooker will be described with reference to FIG. In FIG. 4, a support plate 3 for supporting the heating coil 2 is arranged at a substantially central portion of the housing 1, around which a control board 4, a high frequency transistor 5 and a cooling fan 7 are attached. There is. The cooling fan 7 is arranged at the corner of the housing 1 and cools the heating coil 2, the high frequency transistor 5, the control board 4, and the like.

However, in the conventional configuration, the housing 1 is provided below the heating coil 2.
Since the bottom surface of the heating coil is located as it is, there is a problem that the radiant heat of the heating coil 2 overheats the floor temperature.

Therefore, in view of the above problems, the present invention provides an induction heating cooker in which the floor temperature does not overheat even when the thickness is reduced.

Means for Solving the Problems The technical means of the present invention for solving the above problems is to provide a cooling draft including a plurality of layers of independent air chambers in a housing containing an inverter circuit including a heating coil and electronic components. This is a configuration in which a path is formed.

Action The action of this technical means is as follows. That is, since multiple cooling ventilation paths through which the respective cooling air flows are formed in a plurality of layers, the radiant heat of the heating coil is less likely to be transmitted to the bottom floor of the induction heating cooker, and therefore the clearance between the housing and the floor is small. Can be reduced.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, the heating coil 9 located above the central portion of the housing 8 is fixed by a support plate 10. A lid 26 that divides the heating coil 9 into upper and lower parts is arranged on the outer periphery of the heating coil 9. A sirocco fan 11, which is a cooling fan, is arranged at a corner portion of the housing 8. The outer periphery of this sirocco fan is surrounded by a guide 22. The inverter circuit is composed of a control board 13 which is an electronic component of a control device for performing high frequency oscillation control, a high frequency power supply transistor 18 which is a switching element, a high frequency power supply capacitor 20 and a resonance capacitor 19. And the control board 13,
The high frequency power supply transistor 18 to which the heat radiation fin 17 is attached and the capacitors 19 and 20 are arranged on the outer peripheral portion of the heating coil 9 so as to face each other. In particular, the control board 13 is located below the lid 26, and the lower space thereof is partitioned into multiple layers to form a ventilation passage for cooling. The air outlets 12 and 16 of the sirocco fan 11 are opened so as to face the transistor 18, the capacitors 19 and 20, the control board 13 and the heating coil 9, respectively, and the partition wall 23 partitions the heating coil 9 and the control board 13. Therefore, the wind heated by the heating coil 9 is prevented from flowing into the control board 13.

As shown in FIGS. 2 and 3, the xx ′ cross section and the yy ′ cross section of FIG. 1 show the blower port 12 of the sirocco fan 11.
The cooling air flowing therethrough is divided into upper and lower parts of the control board 13.
The cooling air flowing through the heating coil 9 and the cooling air flowing through the control substrate 13 are separated by a partition wall 23 that partitions a part of the control substrate 13 located below the heating coil 9 from other portions. Since the electronic component 25 provided on the control board 13 below the heating coil 9 is easily affected by the heat of the heating coil 9, a component having high heat resistance is arranged. For example, a coil for catching the magnetic force of the heating coil 9, and electronic components for a control device are arranged on the control board 13 located in the space partitioned by the heating coil 9 side and the partition wall 23.
A multi-layer cooling ventilation path is formed by being covered with a lid 26 provided on the control board 13. Exhaust ports 15 and 21 are provided in this cooling ventilation path.

The operation of the induction heating cooker configured as above will be described.

When the sirocco fan 11 rotates, the cooling air is diverted from the air blow ports 12 and 16 to the transistor 18, the capacitors 19 and 20, and the control board 13. The split cooling air cools the transistor 18 and the capacitors 19 and 20 and flows out from the exhaust port 15. Further, the cooling air that has flowed out to the control board 13 side flows through the multilayer cooling ventilation path and flows out from the exhaust port 21. Further, the cooling air flowing out to the heating coil side flows in a cooling air flow passage formed in multiple layers in a part of the control board 13. The cooling air that has flowed out independently cools each component.

According to the present embodiment, since the partition wall 23 separates a part of the control board 13 on which electronic components for control weak against heat are arranged from the heating coil side, a malfunction due to a loss of components or heat is ensured. It can be prevented.

EFFECTS OF THE INVENTION As is apparent from the embodiments described above, since the present invention forms the cooling ventilation path having a plurality of layers, the radiant heat of the heating coil is weakened by each layer, and the floor temperature can be kept low. Therefore, even if the device body is made thin, the floor temperature does not overheat. In addition, when the induction heating cooker is placed on a table table made of iron or stainless steel and used, the effect is great.

[Brief description of drawings]

1 is a perspective view showing the interior of an induction heating cooker according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line xx 'in FIG. 1, and FIG. 3 is a sectional view taken along the line yy' in FIG. 4 and 5 are exploded perspective views showing the inside of a conventional induction heating cooker. 9 ... Heating coil, 11 ... Sirocco fan, 1 ... Control board, 18 ... High frequency power transistor, 19 ...
Resonance capacitor, 20 ... High frequency power supply capacitor.

Claims (1)

[Claims] 1. A heating coil for inductively heating an object to be heated, an inverter circuit including an electronic component for oscillating the heating coil at a high frequency, and a housing containing the heating coil and the inverter circuit. Is a lid for vertically dividing the outer periphery of the heating coil located above the inside and a partition plate for vertically partitioning the lower space of the heating coil. For cooling air flow by the space partitioned by the lid and the partition plate. An induction heating cooker in which a plurality of ventilation paths are formed, and a partition wall for partitioning the heating coil section and the inverter circuit section is provided in the cooling ventilation path.