JPS5829910Y2 - High frequency heating device - Google Patents

Description

[Detailed description of the invention] Generally, a magnetron is used as a high-frequency generator in a high-frequency heating device, but since the magnetron generates high heat during operation, it must be sufficiently cooled.

At this time, sirocco fans have been mainly used to cool the magnetron, but recently some products using propeller fans have been commercialized because they can efficiently cool not only the magnetron but also electrical parts such as transformers. ing.

However, in the case of a propeller fan, unlike a sirocco fan, it is not possible to send air in a concentrated manner.

Therefore, unlike a sirocco fan, which cools electrical parts such as a lance with intake air and cools the magnetron with blowing air, in the case of a propeller fan, the propeller fan is installed near the intake port and is placed inside the main body. The most efficient method of cooling is to blow cooling air directly onto heat-generating parts such as magnetrons and transformers.

Generally, a part or all of the cooling air from the high-frequency heating device passes through the heating chamber to prevent dew condensation inside the heating chamber.

Therefore, a filter is usually provided at the intake port of a high-frequency heating device in order to prevent dust from entering the heating chamber as much as possible.

At this time, in most cases, the filter is fixed with an adhesive part provided in a part thereof.

As a result, in the case of a high-frequency heating device using a propeller fan, rotating objects (motor shaft, blades, etc.) are located near the filter.
However, as mentioned above, the filters are fixed with adhesives that are not always reliable, so the filters may become unattached due to various factors.
It may come into contact with the rotating body and cause abnormal noise, or in the worst case scenario, the motor may become locked due to it clinging to the rotating body, causing a fire or a fire.
There was a risk of accidents such as electric shock.

The present invention solves the above-mentioned conventional drawbacks with a simple structure, and one embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a heating chamber wall constituting a heating chamber (not shown), and a front opening of the heating chamber is covered by a door 2 that can be opened and closed.

Reference numeral 3 denotes a magnetron constituting a high-frequency generator, which is attached to an extended portion of the heating chamber upper plate 4 and configured to supply high-frequency power into the heating chamber via a waveguide 5.

Reference numeral 6 denotes a punched hole forming an intake port provided on the back plate 7 of the main body, 8 a filter provided on the front side of the punched hole 6, and 9 a propeller fan driven by a fan motor 10 attached to the back plate 7 of the main body. 3 and a transformer 11 for supplying high pressure to the magnetron 3.

Reference numeral 12 designates an air guide for sending air into the heating chamber after cooling the magnetron 3, and reference numeral 13 designates a punched hole provided in the bottom plate 14 of the main body, which constitutes an exhaust port.

In such a configuration, the fixing structure of the filter 8 will be explained with reference to FIG. 2. The filter 8 has an adhesive 1 on both sides.
5 is applied, and first the main body back plate 7 is applied with adhesive 15.
It is attached so as to cover the punched hole 6, and then it is fixed by being clamped to the main body back plate 7 using the mounting legs 16 that support the fan motor 10.

Next, to explain the cooling system, the air flowing in from the punched holes 6 and 7 provided in the back plate 6 of the main body passes through the filter 8, and then is blown to the magnetron 3 and transformer 11 by the propeller fan 9. , and transformer 11.

Note that the air after cooling the magnetron 3 passes through the air guide 12, enters the heating chamber, and discharges steam generated during heating.

On the other hand, the air after cooling the transformer 11 is
The liquid is discharged to the outside through a punched hole 13 provided in 4.

Although not shown, the fan motor 10 may also serve as a motor for rotating the turntable.

As is clear from the above explanation, according to the present invention, the filter is fixed not only by adhesive but also mechanically, so even if something with insufficient adhesion occurs, the filter will not fall off. do not have.

Therefore, even though the filter and the rotating body are close to each other, there is no risk that the filter will come into contact with the rotating body and generate abnormal noise, or that the motor shaft will be locked and lead to accidents such as smoke generation and ignition.

In addition, propeller fans generally vibrate more strongly than sirocco fans, and there is a risk that crackling noise may occur between the back plate of the main unit and the motor mounting foot, or that vibrations from the motor may be transmitted to the back plate of the main unit, causing resonance noise in the main unit case. The filter serves as a buffer between the motor mounting foot and the wooden back plate, and is of great practical value as it can prevent the above defects from occurring.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a high-frequency heating device showing an embodiment of the present invention, and FIG. 3...High frequency generator, 6...Intake port, 8...Filter, 9...Propeller fan, 16...Mounting foot.

Claims (1)

[Scope of utility model registration request] In a high-frequency heating device comprising a high-frequency generator that radiates high-frequency waves into a heating chamber and a propeller fan that cools the high-frequency generator, the propeller fan is disposed near an intake port provided in a part of the main body, A high-frequency heating device characterized in that a filter adhesively fixed to the air intake port is clamped and fixed by mounting legs that support the propeller fan.