JPS5820818Y2 - High frequency heating device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a high-frequency heating device that is equipped with a high-frequency oscillator and a steam generator and heats objects to be heated such as food.In particular, sufficient transparency is always maintained during high-frequency heating. This is an improved door body structure.

For heating devices that use an electric heater, gas heater, or high-frequency oscillator alone or in combination as a heating means, two transparent plates such as glass are attached to the door that opens and closes the entrance to the heating chamber so that the inside of the heating chamber can be seen. There is something.

In this case, ventilation holes are provided at the bottom and top of the support part of the transparent plate.
An exhaust hole is provided to ventilate the space between the two transparent plates by forced convection or natural convection from the bottom to the top, suppressing the temperature rise of the door during heating and preventing fogging.

However, in a device equipped with a steam generator and a high-frequency oscillator as heating means, if the structure is such that ventilation is conducted from the bottom to the top of the two transparent plates as described above during steam heating, the water vapor in the heating chamber will flow through the door. As water vapor leaks through the gaps in the heating chamber, the top, bottom, and sides of the door are filled with water vapor.
And a large number of water droplets are generated.

Therefore, if there is a ventilation hole or exhaust hole at the top or bottom of the door that communicates with the space between the two transparent plates, water vapor and water droplets will flow into this space and adhere to the transparent plate, making it impossible to see inside the heating chamber. There were some drawbacks.

In view of the above points, the present invention was developed by providing ventilation holes only in the transparent plate located on the outside of the heating chamber where water vapor and water droplets do not flow during steam heating, that is, in front of the door, and sealing the rest. Even in the unlikely event that water vapor enters between the transparent plates,
It is an object of the present invention to provide a high-frequency heating device equipped with a door that always maintains sufficient transparency by discharging this water vapor through the ventilation hole.

Examples will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a high-frequency oscillator that generates high-frequency energy, 2 is a waveguide that guides the high-frequency energy generated by this high-frequency oscillator into the heating chamber 4, and 3 is the connection between the waveguide 2 and the heating chamber 4. It is an opening.

Reference numeral 5 denotes an aperture plate which is made of a silicon laminate plate that transmits high frequency energy and extends above the coupling opening 3.

Reference numeral 6 denotes a rotary tray on which the object to be heated 7 is placed and rotated. The rotary tray 6 is supported by a rotary table 8 and is detachably provided in the heating chamber 4.

The rotating table 3 has a weight supported by a bearing 9 and is rotated by a drive motor 10.

11 is a steam generator, and 12 is a steam radiation port for releasing steam generated from the steam generator into the heating chamber 4.

Reference numeral 13 denotes a water tray that receives water droplets that leak from the inside of the heating chamber 4 through the drain pipe 14 to the outside of the heating chamber when steam is generated.

15 is an opening/closing door of the heating chamber 4.

FIG. 2 is a configuration diagram of the opening/closing door 15, and FIG. 3 is an enlarged view of the circled portion in FIG.

To explain the structure of the opening/closing door 15 in FIG. 2, a metal finder 17 with low high frequency leakage and transparency is sandwiched between the outer glass 16a and the inner glass 16b of the heating chamber 4. At 18, it is supported on the opening/closing door main body 15 by screws 19.

Reference numeral 20 denotes a rubber gasket installed around the glass in order to protect and support the glass.

21 is a ventilation hole provided in the outer glass 16a.

Since the present invention has the above configuration, during steam heating,
The heating chamber is filled with steam, and the opening/closing door 19 and inner glass 16
Even if water vapor infiltrates through the gap 22 of b and into the space 23 between the outer glass 16a and the inner glass 16b, since the outer glass 16a is provided with the ventilation hole 21, the space 23 between the two glasses Since there is a temperature difference between the outside air and the water vapor that has entered the space between the two glasses 23, it escapes to the outside through the ventilation hole 21 of the outer glass 16a.
There is no fogging between the sheets of glass, and the door can always be opened and closed with transparency.

Note that the two glasses can be replaced with transparent plates such as plastic, and the number of ventilation holes is not limited to one, but the effect will be doubled if there are more than one.

Further, as shown in FIG. 4, a lid-like body 2 having a ventilation passage 25
4, it is possible to prevent foreign matter such as dust and wire from entering, and it is useful not only for transparency but also for ensuring safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing an embodiment of the high-frequency heating device of the present invention, FIG. 2 is a sectional view of an opening/closing door, and FIG. 3 is an enlarged view of the portion marked with a circle in FIG. 2. Moreover, FIG. 4 is a partially cutaway perspective view. FIG. 4 shows an example in which a lid-like body 24 is provided on the ventilation hole 21. 1... High frequency oscillator, 15... Opening/closing door, 16 a, 16 b... Glass, 17...
...Wire mesh finder, 21...Vent hole.

Claims (2)

[Scope of utility model registration request] (1) A high-frequency oscillator and a steam generator are provided as heating means, and a wire mesh finder is sandwiched between two transparent plates such as transparent glass plates, and the transparent plate is placed outside the heating chamber. A high-frequency heating device characterized by having an opening/closing door provided with one or more ventilation holes. (2) Utility Model Registration The high-frequency heating device according to claim (1), characterized in that the ventilation hole is closed by a lid-like body having a ventilation path.