JPS62146Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to 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 heat an iron pot by induction.

Among the circuit components of such an electromagnetic cooker, the temperature of the circuit components constituting the inverter circuit increases significantly due to self-heat generation, and the temperature of the heating coil increases due to self-heat generation and conduction heat from the pot, so cooling is required.
In particular, switching elements are semiconductor elements and may be adversely affected by heat. For this reason, conventionally,
In addition to providing heat dissipation fins on the switching element,
The heat dissipation fins were cooled by blowing air into them.

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 has been devised in consideration of such circumstances, and is an improvement to the cooling structure. Furthermore, the present invention forms one unit with two heating parts and one fan, and has a structure in which each heating part can be separated, thereby improving assembly workability and making it easier to inspect and repair each heating part. This is to make it easier.

Hereinafter, the present invention will be explained in detail based on the figures. Fig. 1 is a perspective view showing an integrated two-burner heating unit used in the electromagnetic cooker of the present invention, Fig. 2 is a cutaway front view of the main part of the fan mounting surface of this heating unit, and Fig. 3 is a front view of this heating unit. FIG. 3 is a cutaway top view of the main parts of the heating unit. In these figures, numerals 1 and 1 represent chassis plates made of non-magnetic metal such as aluminum and bent to form a bottom surface and one side surface. These chassis plates 1, 1 are U-shaped when viewed from the side. Reference numerals 2 and 2 refer to electrical components that are arranged in a U-shape on the inner surfaces of the chassis plates 1 and 1 and are attached to the inner surfaces of the chassis plates 1 and 1 via insulating spacers 8 and 8, It constitutes an inverter circuit that generates a shunt current. Reference numerals 3 and 3 designate heat dissipation fins provided on the inner surface of the chassis plates 1 and 1 as described above, to which switching elements 4 and 4, which generate a particularly large amount of heat among the electrical components and are sensitive to heat, are attached. 5,5
represents a control board that is detachably installed on the outer surface of the chassis plates 1, 1 through clips C, C, etc. formed of nylon resin, etc., and a circuit pattern is printed on an insulating board such as phenol resin, and the inverter Various electronic components E, E, etc. that control the circuit are attached. The control boards 5, 5 are electrically connected to the electrical components 2, 2... via connectors (not shown), and are formed by the circuit patterns on the boards 5, 5 and the electrical components E, E... The control circuit provided here performs front control of the inverter formed by each electrical component 2 on the chassis board 1. 6, 6 are the chassis plates 1, 1 upper part and the heat dissipation fins 3, 3, respectively.
A heating coil is arranged and fixed on the upper part via heating coil stands 7, 7, and a high frequency current is supplied from the inverter. Incidentally, thermostats 8, 8 for detecting the temperature of the pot are provided at the center of the heating coils 6, 6. Reference numeral 9 indicates a fan installed on one side of the opening of the chassis plates 1, 1 arranged in a U-shape, and the circuit of this fan 9 creates a space surrounded by the chassis plates 1, 1 and the heating coils 6, 6. wind is sent to 10 is a fan cover provided to cover the side surface of the opening other than the part where the fan 9 is provided, and 11 is a fan guide that protrudes outward like an eave above the fan 9 and is made of a non-magnetic material such as aluminum. , these fan covers 10,
Alternatively, the fan guide 11 serves as an air path guide plate. Further, the fan cover 10 and the fan guide 11 are fixed to the chassis plates 1, 1 by being engaged with the bent sides 12 of the chassis plates 1, 1 with screws 13 or the like. Reference numeral 14 denotes a wind panel screwed together with the heating coils 6, 6 on the upstream side of the upper ends of the heat dissipation fins 3, 3, which adjusts the amount of air sent from the fan 9 to the upper surface of the heating coils 6, 6. Both heat dissipation fins 3,
It has the effect of fixing the upper part of the 3 comrades.

In the heating unit with such a configuration, the fan cover 10 and the fan guide 11 act as an air path guide plate to prevent backflow, mixed flow, etc. of the air, and to prevent electricity in the space formed by the chassis 1 and the heating coil. Cooling air is reliably supplied to the parts. In addition, the fan cover 10 and fan guide 11 are screwed to the chassis 1, 1, and by joining the chassis 1, 1 together and integrating the two-hole heating section, it is possible to assemble the heating unit. , can make the work easier. Furthermore, when repairing or inspecting the control circuit of the inverter, the control circuit boards 5, 5 can be easily removed from the clips C, C, . . . .

FIG. 4 shows two integrated heating units arranged symmetrically with fans 9, 9 facing each other from the back.
It is a top notch view when configuring a 4-burner electromagnetic cooker. In the figure, fan covers 10, 10,
Fan guides 11, 11 form both sides of the duct and the top surface of the duct, respectively, and wind is guided through the duct up to the fans 9, 9.

As described above, the electromagnetic cooker of the present invention has a substrate which has a bottom surface and two opposing side surfaces, and has the switching element disposed on the inner surface thereof, an electrical component provided on the inner surface of this substrate, and a substrate having a bottom surface and two opposing side surfaces. A heating coil fixed to the upper end, a fan provided on the open side surface of the substrate to send air into the space formed by the substrate and the heating coil, and a fan that covers the open side surface of the substrate around the fan. Since it has a fan guide, by rotating the fan, air is efficiently blown into the space formed by the substrate and the heating coil with the fan guide preventing backflow, and the switching element and other This enables effective cooling of electrical components.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the integrated two-burner heating unit used in the electromagnetic cooker of the present invention, Fig. 2 is a cutaway front view of the main parts of the fan mounting surface, and Fig. 3 is the two-burner heating unit. FIG. 4 is a top cutaway view of the four-burner electromagnetic cooker. DESCRIPTION OF SYMBOLS 1... Chassis board, 2... Electrical parts, 4... Switching element, 6... Heating coil, 9... Fan, 10... Fan cover, 11... Fan guide.

Claims (1)

[Scope of utility model registration request] An electromagnetic cooker having a cooling mechanism for cooling a heating coil and a switching element that controls the current supplied to the heating coil, the electromagnetic cooker comprising: a substrate that forms a bottom surface and two opposing side surfaces and has the switching element disposed on its inner surface; electrical components provided on the inner surface of the substrate; a heating coil fixed to the upper end of the substrate; a fan provided on the open side of the substrate for blowing air into the space formed by the substrate and the heating coil; and a fan guide that covers the open side of the substrate around the fan.