JPH0427113Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a cooling device for cooling electrical components of a heater such as an electromagnetic induction cooking device.

<Prior Art> FIGS. 3 and 4 show how a motor 1 for rotating a cooling fan of a conventional electromagnetic induction cooking device (hereinafter referred to as an electromagnetic cooking device) is installed. FIG. 3 shows a plan view of the electromagnetic cooker with the motor attached. Fourth
The figure shows a side view of the motor installed.

The motor 1 is first fixed with screws 5 in the central mounting recess 2a of the motor mounting plate 2, which is made of a metal press work or a synthetic resin molded product, and then
A fan A1 is press-fitted and fixed onto the motor shaft 1a. Place the motor shaft side of this assembled unit on the lower case 3.
The left and right bridging plate parts 2b of the mounting plate 2 are fitted into the fan mounting part 3B of the fan A1, and are fixed to the boss 4 protruding from the lower case 3A on the outer peripheral side of the fan A1 with screws 5a or the like.

However, in this case, since the motor mounting plate 2 and the boss 4 of the lower case 3 that fixes it are located near the cooling fan A for cooling the electronic circuit components 6, 8, 14, the electrical components 6, 8, , 14 could not be obtained smoothly. Further, since the motor mounting plate 2 is located on the upper part of the fan A, it becomes large in size, which has the disadvantage of causing problems in reducing the size of the product.

In addition, to explain the structure of other internal parts in the electromagnetic cooker main body, a heating coil 8 is arranged approximately in the center of the lower case 3 with an open top surface, and an electronic circuit component 6 for exciting the coil 8. A circuit board 9 to which is fixed is fixed to the lower case 3, and the front part of the case 3 includes:
a heating knob 10 for adjusting the excitation of the coil;
An LED board 11 and an output volume 12 are arranged. In the figure, 13 is a plug, 14 is a heat sink, and 15 is a lead wire protection tube connected to the motor 1.

<Objective> The object of the present invention is to provide a cooling device for a heater that can improve the above-mentioned problems, provide a smooth flow of cooling air, simplify the structure, and reduce costs.

<Example> The following is a first example of the cooling device for the heater of the present invention.
This will be explained based on the figure and FIG. Note that components having the same functions as those of the prior art shown in FIGS. 3 and 4 are given the same reference numerals.

That is, in the present invention, the rotation motor 1 of the cooling fan A is disposed in the recess 21 formed in the lower case 3 of the heater main body 20, and a U-shaped motor mount 2 ( The lower ends of a pair of legs 2a formed in the fixture 2 are bent and fixed through leg holes 3a formed in the bottom surface of the case 3, and the motor is attached to the top surface of the fixture 2. A motor shaft through hole 2b is formed through which the shaft 1a and the bearing 1b pass, and the cylindrical central boss portion 22 of the fan A is loosely fitted into the mounting fixture 2. Motor shaft fitting plate 2
3 was formed.

The cooling fan A includes the central boss portion 22 and
It is integrally formed with a disk-shaped fitting plate 23 and a blade part 24 arranged radially around the outer periphery of the boss part 22, and the thick part of the fitting plate 23 that protrudes upward in the center serves as a shaft fitting part. 25, the motor shaft 1a of the motor 1 is fixedly fitted into the fitting part 25, and the fitting part 2
A plurality of insertion holes 26 are formed in the surface of the fitting plate 23 at the outer circumferential portion of the fitting plate 5 so that the user's fingers can be inserted thereinto.

A screw hole 28 is provided on the upper surface of the fixture 2 through which a screw 27 for fixing the fixture 2 and the motor 1 passes.
is formed. Further, the legs 2a of the fixture 2 extend downward along the circumferential surface of the case 1A of the motor 2, and the lower ends of the legs 2a are bent inward to form external projecting pieces 29. In the figure, 3b is a first recess formed in the lower case 3 for fitting the motor 1 and the fixture 2, and 3c is a second recess formed in the motor case contact surface 3d on the bottom of the first recess 3b. It is a recess. The other configurations are the same as the conventional configuration shown in FIGS. 3 and 4, and will therefore be omitted.

Next, to explain the assembly process and operation, first,
After fitting the bearing 1b of the motor 1 into the shaft through hole 2b formed in the motor mount 2, it is fixed with screws 27, and then the fitting part 25 of the cooling fan A is press-fitted into the motor shaft 1b to form a unit. do. To install this unit, insert the lower part of the leg 2a of the motor mount 2 into the leg hole 3a formed in the lower case 3, press the unit downward, and then attach the motor case 1A to the motor case contact surface 3d of the lower case 3. After touching the protruding piece 29
Lower case 3 by twisting or bending
Fixed to. Thereby, the motor 1 is securely fixed to the lower case 3. When installing this unit to the lower case 3, the lower end of the leg 2a is inserted into the leg hole 3a by holding the cooling fan body A, but the cooling fan body A and the motor 1 are relatively free. Since it rotates, the unit can be installed without any trouble by inserting the fingertip into the motor fixing hole 26 to stop the movement of the motor 1, and then inserting and fixing the lower end of the leg 2a into the leg hole 3a.

From the above, the motor 1 is securely fixed to the lower case 3, the installation work is simplified, and since the fixture 2 surrounds the motor 1, the structure itself can be simplified and made more compact. It is possible to reduce costs and reduce costs. In addition, fan body A
Since there is nothing blocking the flow of cooling air on the upper side, a smooth flow of cooling air to the electronic components can be obtained.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

<Effects> As is clear from the above explanation, according to the present invention, the motor shaft of the motor is passed through the motor shaft through hole formed in the motor mount, the motor case is fixed to the top surface of the mount, and the cooling fan is installed. By fixing the motor shaft to the fitting plate of the cooling fan and the motor, inserting the lower part of the leg of the fixture into the leg hole formed in the recess of the lower case and bending the lower end. Since the motor is easily fixed to the lower case, the installation work is simplified.

Moreover, since the fixture is U-shaped and surrounds the motor, the structure itself can be simplified, made compact, and reduced in cost.

In addition, the recessed part of the lower case is usually formed by protruding a part of the lower case downward by utilizing the space between the lower case and the floor surface formed by the legs of the heater main body. Since it can be formed inside the recess, if a part of the cooling fan and motor are placed in this recess, the amount of upward protrusion can be reduced compared to the lower case occupied by these cooling devices.
The internal space of the heater body can be effectively utilized, and the heater body can be made thinner.

Furthermore, the motor mount is arranged to surround the motor, and the fan blades are located on the outside.
There are no parts above the cooling fan that block the flow of cooling air, and the upper part of the cooling fan blade protrudes above the recess in the lower case, allowing air to flow from the side of the cooling fan through the ventilation holes in the lower case. There are no parts that block the intake air, allowing a smooth flow of cooling air.

[Brief explanation of the drawing]

Fig. 1 is a side cross-sectional view of the essential parts of a heater cooling device showing an embodiment of the present invention, Fig. 2 is a perspective view of the same fixture, Fig. 3 is a plan view of a conventional electromagnetic cooker, and Fig. 4
The figure is a side sectional view of the main part of the same. 1...Motor, 1a...Motor shaft, 1b...Bearing, 2...Mounting tool, 2a...Leg, 2b...Through hole, 3...Case, 3a...Leg hole, 3b...First recess , 3c...second recess, 3d...motor case contact surface, 20...heater body, 21...recess, 2
2... Central boss part, 23... Fitting plate, 24... Wing part, 25... Fitting part, 29... External protrusion piece, A
...Cooling fan.

Claims (1)

[Scope of utility model registration request] The cooling fan includes a cooling fan and a motor that rotationally drives the cooling fan, and the cooling fan includes a cylindrical central boss portion, blade portions arranged radially around the outer periphery of the boss portion, and one side of the boss portion. In the cooling device for a heater, the motor is loosely fitted into the boss portion, and a U-shaped motor mounting bracket is provided to surround the upper surface of the motor on the motor shaft side. A motor shaft through hole is formed on the upper surface of the fixture, the motor shaft of the motor is passed through the through hole and its tip is fixed to the fitting plate, and the motor case of the motor is attached to the fixture. A recess is formed inside by being fixed to the upper surface and protruding downward from a part of the lower case of the heater main body, and the motor and the lower part of the cooling fan are disposed in the recess, and the pair of legs of the fixture are arranged in the recess. The lower end of
A cooling device for a heater, characterized in that the recess is bent and fixed by passing through a leg hole formed in the recess, and the recess has a depth such that an upper part of a blade of a cooling fan projects upward.