JPS6012756B2 - High frequency heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a door in a high-frequency heating device in which a door is provided at the front entrance of a heating chamber so as to be openable and closable.

Generally, in high-frequency heating devices, leakage of radio waves from the heating chamber is dangerous and must be prevented.
Even if the amount of radio wave leakage from around the door is below the value regulated by law, there is a control part on one side of the door, and it is highly likely that it will have a negative effect, especially on controls using a microcomputer. The smaller the amount of leakage, the better. Therefore, in order to prevent leakage of radio waves during normal use, doors have conventionally been provided with radio wave attenuation grooves that shield radio waves leaking from gaps between the door part that is in close contact with the closing part of the heating chamber and the gap that is not in close contact with the door part.

Furthermore, when opening the door while radio wave oscillation is occurring, a hook is installed inside the door so that the door can be opened after stopping radio wave oscillation. It is configured to stop radio wave oscillation.

If the hook is provided in the radio wave attenuation groove with the above configuration, the effect of the radio wave attenuation groove will be reduced. Therefore, the present invention forms another radio wave attenuation sea outside the radio wave attenuation groove, and installs the hook in this radio wave attenuation groove. By providing this, the above problem is solved, and one embodiment of the present invention will be described below with reference to additional drawings.

1 is the main body of the high-frequency heating device, 2 is a heating chamber provided in the main body, 3 is a front entrance part of the heating chamber 2, 4 is a door provided in the front entrance part 3 so as to be openable and closable, and 5 is for opening and closing the door 4. Sashi,
The handle 6 is a push button provided at the negative part of the handle 5, and is used to vertically rotate hooks 7 and 7' which lock the door 4 to the front closing portion 3 when the door is closed.

When the door is closed, the hooks 7, 7' are engaged with keys 8, 8' provided on the front opening 3, thereby preventing the door from opening. 9 is a see-through window provided in the center of the door 4; 10
1 is a door frame serving as a frame of a door, and inside this door frame 10, a first radio wave attenuation groove 11 made of a sheet metal is formed.

A part of the opening of the first radio wave attenuation book 11 is covered by a sealing plate 12.
The remaining entrance section 13 is sealed with a conductor cover 14. Next, in FIG. 2, reference numeral 15 denotes the side green where the hooks 7, 7' of the door 4 are provided, and a second radio wave attenuation groove provided outside the first radio wave attenuation groove 11.
The gate is sealed with a sheet metal 17 leaving only a dimension a.

A radio wave absorber 18 having substantially the same size as a is provided at the checkpoint. Although not shown, the hooks 7, 7'
is provided to pass through the second radio wave attenuation groove 15, and the first and second radio wave attenuation grooves 11, 15 are sealed with one dielectric force bar 14, There is no need to seal with a cover, and they may be sealed separately.

Furthermore, in FIG. 1, 19 is a control panel provided on the front right side of the main body 1.

In the above configuration, the Sekiguchi dimension a of the second radio wave attenuation groove 15
As shown in Table 1, it was found that the amount of radio wave leakage from the free end of the door (that is, the side where the hook was installed) was significantly reduced. According to the invention, it is possible to dramatically reduce leakage of radio waves from the free end side of the door, that is, the side where the hook in the above embodiment is provided, which has been a problem in the past.

It also brings about ground-breaking effects in controls with amplifiers that amplify more than a dozen ways, such as infrared sensing type controls and humidity sensor sensing type controls, which are being developed recently.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a high-frequency heating device showing an embodiment of the present invention in an open state, and FIG. 2 is a sectional view taken along the line A-A' in FIG. 1...Main body, 2...Heating chamber, 3...Front opening □, 4
...Door, 7,7'...Hook, 8,8'...Key, 11...First radio wave attenuation groove, 15...
- Second radio wave attenuation groove, 18... Radio wave absorber. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A heating chamber, a door provided on the periphery of the opening of the heating chamber so as to be openable and closable, a first radio wave attenuation groove provided on the periphery of the door, and a door for closing the door. a hook for locking the door to the opening of the heating chamber; a second radio wave attenuation groove located outside the first radio wave attenuation groove through which the hook passes; A high-frequency heating device is provided with a metal sheet that covers the opening of the second radio wave attenuation groove with a dimension a remaining, and the opening dimension a and the width of the radio wave absorber are substantially the same. 2. The high-frequency heating device according to claim 1, characterized in that the opening dimension a of the second radio wave attenuation groove is 7 mm or less.