JPH01130490A - Induction heating cooking apparatus - Google Patents

Abstract

PURPOSE:To make a fan motor for cooling in a small size and enhance the anti-noise capacity of apparatus by placing a heater and controller of the apparatus in separate casings. CONSTITUTION:From an inverter 14, high frequency current is supplied to a heating coil 12 through a controller connecting terminal 22 and a heater connecting terminal 21, and the heating coil 12 heats an object 10. The radiation heat from the object 10 and heating coil 12 generated at this time will not conducted to a casing 19 for controller, as it is separated from a casing 13 for heater. Thus the cooling ability of a fan motor 18 may satisfactorily suppress the temp. rise due to self heat emission. This accomplishes the construction in small size, lowers the revolving speed, and enhances the anti-noise capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an induction heating cooker for heating a pot or the like for cooking.

2. Description of the Related Art Conventionally, induction heating cookers of this type have been constructed as shown in FIGS. 4 and 6. In other words, the device body 1
A top plate 3 made of a non-magnetic material such as ceramic is placed on the top surface, on which a heated object 2 such as a vortex is placed, and below the top plate 3 several copper wires are placed to heat the heated object. A twisted spiral heating coil 4 is fixed to the lower center of the main body 1 in close proximity to the lower surface of the top plate 3.

Further, a printed circuit board 7 on which an inverter device 6 that supplies high-frequency current to the heating coil 4, an inverter control circuit 6 that controls oscillation of the inverter device 6, etc. is mounted, and a large-capacity transistor 8 that performs switching of the inverter device 6. This transistor 8 and inverter device 5. A fan motor 9 and the like for cooling heat-generating components in the inverter control circuit 6 are also arranged in the lower part of the main body 1 at a position lower than the heating coil 6.

Problems to be Solved by the Invention However, in such a configuration, the heat-generating components such as the large-capacity transistor 8 rise to a temperature higher than that due to self-heating due to radiant heat from the heated object 2 and the heating coil 4. In order to increase the cooling capacity of the fan, the number of rotations is increased and the shape of the fan is increased, which increases noise such as wind noise from the fan blades. Furthermore, as shown in FIG. 6, the heat-generating components require a complicated cooling structure, such as placing them around the fan motor 9 or in the path of the cooling air.
It is difficult to realize an electrically optimal arrangement, and there are problems such as being easily affected by the high frequency magnetic field generated by the heating coil 4, being susceptible to external noise, and causing the control circuit of the device to malfunction. Further, even when the top plate 3 is stored, the surface of the top plate 3 is exposed to the outside, so damage caused by objects falling from above and dust, etc., spoil the aesthetic appearance of the device.

Therefore, in view of the above-mentioned problems, the present invention separates the heating section consisting of a heating coil from other control sections of the device, thereby reducing the temperature rise of the heat-generating components and improving the noise tolerance of the device. By connecting the controller and the controller with a rotary pivot, the main body of the device can be made more compact when stored, and damage to the top plate can be prevented.

Means for Solving the Problems In order to achieve the above object, the induction heating cooker of the present invention has the following features:
The heating section, which consists of the top plate and heating coils, and the control section, which consists of the inverter device including large-capacity transistors, the heat-generating components in its control circuit, and the cooling fan motor that cools the heat-generating components, are each housed in separate housings. It is placed inside the body, and the respective casings are connected by a rotating pivot, and when the device is used, the heating part casing and the control part casing are placed side by side and installed in each casing. The connecting terminal portion is configured to be electrically connectable.

Effect With the above configuration, the heat-generating parts of the device do not receive radiant heat from the heated object or the heating coil, so it is possible to suppress the temperature rise of the heat-generating parts even if the cooling fan motor is downsized and rotated at a low speed. In addition, the control circuit of the device is not affected by the high-frequency magnetic field from the heating coil, improving noise immunity, and since the top plate of the device is not exposed to the outside when stored, there is no risk of damage to the top plate. This prevents contamination caused by dirt and dust, maintains the aesthetic appearance, and allows storage of two devices stacked on top of each other, reducing the amount of space needed to store the devices.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1, 2, and 3.

1 and 2, the induction heating cooker includes a top plate 11 on which an object to be heated 10 is placed, an object to be heated 10
A main control circuit for equipment such as an inverter device 14 that supplies high-frequency current to the heating coil 12 and an inverter control circuit 16 that controls oscillation of the inverter device 14 is mounted. A large capacity transistor 17 for switching the inverter device 14. The transistor 17, the inverter device 14, and a control unit housing 19 consisting of a fan motor 18 for cooling heat-generating components in the main control circuit are separated, and each housing 13.19 is connected by a rotary hinge 2o. Continuous in two places.

tied together.

In the induction heating cooker configured as above, the object to be heated 1o
When performing heating, etc., the user rotates the hinge 20, folds it up, juxtaposes the heating section housing 13 and the control section housing 19, and connects the connection terminal section 21 provided on the side surface of the heating section housing 13. When the input switch (not shown) of the device is connected to the connection terminal section 22 provided on the side surface of the control section housing 19, the cooling fan motor 18 starts rotating at the same time.
The inverter control circuit 16 receives the signal from the switch and drives the large capacity transistor 17, and the inverter device 14 starts oscillating. Then, a high frequency current is supplied from the inverter device 14 to the heating coil 12 via the control section connection terminal section 22 and the heating section connection terminal section 21.
heats the object 10 to be heated. The radiant heat generated at this time from the heated object 1o and the heating coil 12 is transferred to the heating unit housing 1.
3 and the control unit housing 19 are separated, so that the cooling capacity of the cooling fan motor 18 is not transmitted to the inside of the control unit housing 19. Therefore, the cooling capacity of the cooling fan motor 18 is limited to that of the large-capacity transistor 17, the inverter device 14, and other parts of the main control circuit. Since it is only necessary to suppress the temperature rise due to the self-heating of the heat-generating components, it is possible to reduce the size and the rotation speed. Furthermore, since the heating unit housing 13 and the control unit housing 19 are separated,
The control unit is not directly exposed to the high-frequency magnetic field from the heating coil 12, and in addition, since there is no heating coil 12 inside the control unit housing 19, the inverter device 14, large capacity transistor 17. A fan motor 18 for cooling the inverter control circuit 15, etc. Since they can be placed together near each other and the mutual wiring can be shortened, noise resistance can also be improved.

Next, when the device is not used, the hinge 20 is expanded by 180°C as shown in FIG.
Control unit housing 13J on the top surface of 9: Since the top plate 11 can be stored in a stacked state with their surfaces aligned, the top plate 11 is not exposed to the outside and can be stored in a space-saving location.

More than the effects of the invention, as is clear from the examples, according to the present invention, the heating section and the control section of the device are separated into separate casings, so that the heat-generating parts in the device are separated from the heated object and the control section. Since the cooling fan motor is not directly exposed to the radiant heat of the heating coil, the cooling fan motor can be made smaller and the rotation speed can be lowered, so noise caused by wind noise from the blades can also be reduced. In addition, since the heating coil is not located on the control unit, there is no need for a complicated cooling structure, and it is possible to realize electrically desirable wiring such as eliminating the need to run long lead wires or patterns between control units. Since it is not affected by the high frequency magnetic field from the heating coil, the noise resistance of the device is improved. Furthermore, by connecting the two separate casings with a pivot such as a rotary hinge, the two casings can be stacked together while still being connected, improving usability when storing them and requiring less storage space. In addition, since the top plate is not exposed to the outside, it is possible to prevent the top plate from being damaged or dirtied by dust, and the beauty of the top plate can be maintained.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an induction heating cooker according to an embodiment of the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a side view of the induction heating cooker when stored, and Fig. 4 is a conventional induction heating cooker. FIG. 6 is a longitudinal cross-sectional view of the induction heating cooker, and FIG. 6 is a cross-sectional view thereof. 11... Top plate, 12... Heating coil, 13... Heating unit housing, 14...
・Inverter device, 16... Inverter control circuit, 17... Large capacity transistor, 18...
...Cooling fan motor, 19...Control unit housing, 2o...Rotary hinge, 21...
Heating section connection terminal section, 22... Control section connection terminal section. Name of agent: Patent attorney Toshio Nakao and 1 other person f/
°-)-, Gea γ Mood 12--゛Karona^ Coil 1.11-1~il Tomoe Riyafu (Book 14--゛Iso 8 "-da, 〒(X 15--~) Tsuba'-ta thousand "Sakai Kaisho To 17-Funnameri T Tora'-Last Tai 8-Two Volumes Faso De One Ta 2l ---fII] 嬬8P Wang Laofun" Photo 4?22 ---Written 1 to 1 year ll

Claims (1)

[Claims] An inverter device consisting of a heating coil that heats an object to be heated such as a pot, a heating part consisting of a top plate on which the object to be heated is placed, and a heat generating component such as a large capacity transistor that supplies a high frequency current to the heating coil. An inverter control circuit that controls the oscillation of the inverter device, and a device control section that includes a cooling fan motor that cools the heat-generating components such as the large-capacity transistors are housed separately in separate casings, and the A part of the heating unit casing is provided with a connection terminal part connected to both ends of the heating coil, a part of the control part casing is provided with a connection terminal part connected to the inverter device, and the heating part casing is provided with a connection terminal part connected to both ends of the heating coil. The induction heating cooker is configured such that a connection terminal section of the control section can be electrically connected to a connection terminal section of the control section casing, and the heating section casing and the control section casing are connected by a rotary pivot.