JPS5942574Y2 - heating cooker - Google Patents

Description

[Detailed description of the invention] This invention relates to a heating cooker using the so-called hot air circulation method that increases the temperature inside the heating chamber using hot air. To provide a heating cooker with good workability by improving the degree of adhesion between a heating chamber and a heating chamber.

Conventionally, in this type of hot air circulation heating cooker, when installing the compartment in which the heater and circulation fan are installed into the heating chamber, a gasket is inserted between the compartments to prevent air leakage, or the number of screws is increased. or spot welding.

When putting the packing in, it is a place that gets very hot after all.
Asbestos, asbestos, etc. must be used, which is costly and requires the use of twice or three times during service or repair.
When the gauge was removed, it became brittle and had to be replaced with a new one, and when it was replaced, a lot of powder came out, making cleaning up difficult.

Also, if you increase the number of screws or perform spot welding,
This has disadvantages in that work efficiency deteriorates and it takes too much time to remove the circulation fan during service or repair.

Therefore, the present invention solves the above-mentioned drawbacks in a simple manner, and one embodiment of the present invention will be described below based on the drawings.

There is a heating chamber 2 in the main body 1 for cooking food.

A door 3 is attached to the front opening of the heating chamber 2 so as to be openable and closable.

A power supply port 4 is formed in the earthen wall of the heating chamber 2, and is connected to a magnetron 5, which is a high frequency generator, through a waveguide 6, and radiates high frequency waves into the heating chamber 2.

Note that the power supply 0.4 is covered with a cover 7 made of a dielectric material to prevent food particles, water vapor, etc. from entering the waveguide 6.

A magnet-driven rotating mounting table 8 is attached to the bottom wall of the heating chamber 2, and a saucer 9 is placed on top of this.

That is, a magnet A1°0 is attached to the lower part of the rotary mounting table 8, and when the pulley A11 attached to the outer bottom wall of the heating chamber rotates, the magnet B12 attached to the boot IJAII rotates, and the magnet A10 is attached to the magnet B12. The rotary mounting table 8 supported by the rollers 13 is rotated by the suction.

metal plate 14S to which the button heating chamber bottom wall and magnet are attached
It is made of a non-magnetic metal plate such as US304 or aluminum, and is formed so that magnetism passes through it.

Next, a compartment 16 is provided on the rear wall outside the heating chamber with a diaphragm plate 15, and a heater 1 is installed in the compartment 16 to increase the temperature inside the heating chamber 2.
7, and a fan 18 for circulating air within the heating chamber 2 and the compartment 16.

The rear wall 19 of the heating chamber is provided with an inlet 20 corresponding to the center of the fan 18, and air outlets 21 are provided on the left, right, upper and lower sides, so that when the fan 18 rotates, air circulates as shown by the arrows in FIG.

That is, the air in the heating chamber 2 flows into the compartment 16 through the suction port 20.
The air that entered the compartment 16 is heated by the heater 17 and turned into hot air, which is blown out into the heating chamber 2 through the outlet 21 and placed on the saucer 9 rotating inside the heating chamber 2. The heated object 22 is heated and cooked.

As shown in FIG. 3, the saucer 9 consists of a food placing table 23 made of a metal plate and a support plate 24 made of a metal plate.The food placing table 23 and the support plate 24 are made of small metal plates or rods. Since they are connected by the formed legs 25, the hot air blown out from the air outlet 21 below the food placement table 23 goes around the bottom of the food placement table 23 and enters the suction port 20, so the food placement table 23 is one piece. It heats up evenly and allows you to brown the heated item.

Further, when the ambient temperature in the heating chamber 2 reaches a certain level or higher, the temperature detection device 26 attached to the compartment side of the air outlet 21 controls the electric power that enters the heater 17, and the temperature in the heating chamber is kept constant.

Next, a method of driving rotation of the rotary mounting table 8 and the circulation fan 18 will be explained.

These are driven by one motor, and a boolean IJB attached to this motor 27 and made integrally.
2 B to the circulation fan 1 via A31 to the boot IJ C30 attached to the shaft 29 of the circulation fan 18.
8 and the others are driven by the worm gear 3 via B32.
A bell) is driven from a pulley E35 attached to the output shaft of the worm gear 33.
The rotary mounting table 8 is driven by rotating the pulley A11 via the pulley A11.

Note that the magnetron 5 is cooled by a fan heater 37,
The cooled air passes through an air guide 38 and an exhaust guide 39 to exhaust steam generated in the heating chamber during high frequency operation.

Next, we will explain the heat insulating board installed adjacent to the heating chamber wall.

Two heat insulating plates 40 are installed on the upper wall of the heating chamber with a gap between them, and the upper heat insulating plate extends to the top of the waveguide.

On the rear wall of the heating chamber, a heat insulating plate B41 is attached to the rear of the aperture plate 15 forming the compartment 16, and a bearing 42 supporting the circulation fan shaft 28 and a bearing mounting plate 43 are attached to this heat insulating plate 40.

Maintain a constant gap between the heating chamber side wall and the heating chamber side wall,
A heat insulating plate 44 whose lowest part is bent into an oval shape is attached so that the lowest part contacts the bottom wall of the heating chamber.

Next, the relationship between the rear wall 19 of the heating chamber and the aperture plate 15 forming the compartment 16, which is the main point of the present invention, will be explained with reference to FIG.

For the sake of clarity, the description will omit the air outlet, suction port, circulation fan, heat insulating plate, etc.

FIG. 3a is a partial view of the top surface, and FIG. 3b is a partial view of the side surface.

1. There is a t of about 0.3 to 0.5 mm on the rear wall 19 of the heating chamber.
I'm only pushing the steps.

On the other hand, the flange portion 46 of the diaphragm plate 15 that contacts the heating chamber rear wall 19 is on the same plane, and the left and right flange portions in Fig. a have a step T.
The screws 47 are used to tighten the upper and lower flanges in Figure b, and the screws are not tightened at the upper and lower flanges shown in Figure b, only so that they abut on the same plane for a length t.

In addition, in the above explanation, the screws were not tightened on the top and bottom, but on the left and right sides.
It goes without saying that it is the same even if you do not tighten the screws on the left and right sides.

As explained above, according to the present invention, the following effects can be expected.

(1) Since there is a step t of about 0.3 to 0.5 where screws are tightened, not only do the screw tightened parts come in close contact with each other, but also the flange parts where screws are not tightened. Since they are pulled into close contact with each other, there is no air leakage during hot air circulation, making it possible to create an efficient heating cooker.

(2) Only the left and right or top and bottom flanges need to be tightened with screws, which greatly improves workability and serviceability.

In particular, in the lower part, the gap is usually narrow and the screws must be tightened at a point one distance back by the diaphragm plate 15, which is extremely difficult to do, and with the present invention, screws can be tightened only on the left and right sides.

Furthermore, compared to the conventional method of inserting a backing, the cost is lower and it is extremely economical.

(3) The rear wall of the heating chamber is stepped by t, and this step reinforces the rear wall of the heating chamber.

Therefore, it is economical to use a thinner metal plate than in the past, and has a smaller heat capacity, allowing the temperature inside the heating chamber to rise more easily.

Further, since the step T is provided and the screws are tightened, a force is applied to the rear wall of the heating chamber in an inward direction of the heating chamber, and a force is applied to the case forming the compartment in an outward direction.

Therefore, even if it is slightly deformed, the gap between it and the circulation fan rotating inside the compartment will not become smaller, and there is no need to worry about it touching or making noise.

In addition, there is a button at the rear of the rear wall of the heating chamber when the circulation fan rotates, so there was a risk that the rear wall of the heating chamber would become sticky at high temperatures and come into contact with the circulation fan. All sorts of dangers will be eliminated.

A hook 47 is provided at the top of the button aperture plate 15 to hang the aperture plate from the heating chamber wall.
is hooked onto the flange portion 48 at the rear and upper part of the heating chamber, and then tightened with screws.

As a result, ■ both hands can be used freely when tightening screws, and both screw holes can be easily aligned, resulting in an extremely good work ratio.

Even if the upper diaphragm plate part fl'A is exposed at the rear of the heating chamber, it will serve as an air leakage prevention plate.

[Brief explanation of the drawing]

Fig. 1 is a top sectional view of a heating cooker showing an embodiment of the present invention, Fig. 2 is a front sectional view of the same, Fig. 3a is a top sectional view of the same essential parts,
b is a sectional view of the same side. 1...Main body, 2...Heating chamber, 5...
...Magnetron, 15...Aperture plate, 16.
... Compartment, 17 ... Heater, 18 ...
...Fan, 19...Heating chamber rear wall, 46...
...flange part, 47...screws.

Claims (2)

[Scope of utility model registration request] (1) A heating chamber in which the object to be heated is stored and cooked inside the main body;
A compartment adjacent to the rear wall of the heating chamber, a heater provided in the compartment, a fan device that circulates air between the heating chamber and the compartment, and a case that covers the circulation fan device and the heater to form the compartment. The back wall of the heating chamber is provided with a convex portion having a step t in the outward direction when viewed from the heating chamber, and the compartment is formed from the inside t of the convex portion on the top and bottom or left and right of the case. A heating cooker in which the length l is in contact with each other on the same plane, and the other flange parts that do not come into contact with each other on the same plane are tightened with screws. (2) The heating cooker according to claim 1, which is a registered utility model, wherein the upper part of the case is provided with a hook for hanging the case from the heating chamber wall.