JPS6231999Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a high-frequency cooking device used for cooking, and more particularly to a high-frequency excitation device for a magnetron in this high-frequency cooking device.

[Technical background of the invention and its problems]

As shown in FIGS. 1 and 2, a conventional high-frequency heating cooker has a casing body a shaped like a casing.
A partition plate e integrated with a top plate d is provided inside the oven b to separate and form the oven b and the machine room c, and an opening/closing door f is provided in the opening b ₁ of the oven b so as to be openable and closable. A magnetron g is disposed on the partition plate e, and a waveguide h for guiding the high frequency waves of the magnetron g to the oven b is provided along the top plate d. top plate d
An excitation port i is bored in the top plate d, and a starvation fan j is provided in a part of the top plate d where the excitation port i is located.

Therefore, the food to be cooked l placed on the shelf k of the oven b can be guided by high frequency waves from the antenna _g1 of the magnetron g by operating the operation panel m provided on the front of the casing body a. The high frequency waves are irradiated through the wave tube h to the object l in the oven b from the excitation port i, and the high frequency waves are evenly diffused in the oven b by the starvation fan j to evenly spread the object l to be cooked. It can be heated and cooked.

However, in the conventional high-frequency heating cooker described above, the excitation port i is provided only on the top plate d located above the oven b, so most of the high frequency from the excitation port i is actually unidirectional. Direct radiation makes it difficult to heat the food uniformly,
Not only is heating unevenness likely to occur, but the starvation fan j provided on the top plate d to disperse high frequency waves must also incorporate a mechanism such as a motor to drive it, which reduces the number of component parts. The number of parts increases, making assembly difficult, making it difficult to save labor through mass production.

[Purpose of invention]

In order to solve the above-mentioned difficulties, the present invention uniformizes the electric field distribution without providing a starvation fan, simplifies the configuration, and introduces high frequency waves into the oven from multiple directions to uniformly spread the food to be cooked in the oven. To provide a high frequency heating cooker capable of heating and preparing food.

[Summary of the idea]

The present invention provides a top plate, a partition plate, and a bottom plate that separate the oven and the machine room in the casing body, and forms a high-frequency path with a substantially U-shaped waveguide along the peripheral wall of the oven. one horizontal part of the waveguide is provided, one horizontal part of the waveguide is extended into the oven, each excitation port is bored in the waveguide to communicate with the oven, and a magnetron is attached to each corner of the waveguide. It was constructed as follows.

[Example of idea]

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In FIGS. 3 to 5, reference numeral 1 denotes a casing body formed in the shape of a casing, and inside this casing body 1, a top plate 4 that separates and forms an oven 2 and a machine room 3 is integrated. A partition plate 5 and a bottom plate 6 are provided, and an opening 2 of the oven 2 is provided.
A is provided with an opening/closing door 7 which can be opened and closed freely. Furthermore, a shelf board 8 is removably provided inside the oven 2, and a food to be cooked 9 is placed on this shelf board 8.

On the other hand, the top plate 4, partition plate 5, and bottom plate 6 forming the peripheral wall of the oven 2 are shown in FIGS. 4 and 5.
As shown in the figure, a substantially U-shaped waveguide 10
are provided to form a high frequency passage 11, and both upper and lower horizontal portions 10 of this waveguide 10
A and 10b each have a pair of excitation ports 12 and 13.
is bored in communication with the oven 2.
A magnetron 14 is installed at each upper corner 10c of the waveguide 10, and the high frequency waves from the antenna 14a of the magnetron 14 are transmitted through each high frequency path 11 of the approximately U-shaped waveguide 10. The excitation ports 12 and 1 are divided into upper and lower parts.
3, the food to be cooked 9 in the oven 2 can be irradiated from above and below.

Although the waveguide 10 is provided along the circumferential wall of the oven 2, it is preferable that the waveguide 10 be located approximately at the center of the oven 2, as shown in FIG. Moreover, the waveguide 1
The lower horizontal portion 10b of the bottom plate 6 is attached so as to be located along the inner wall of the bottom plate 6.

Therefore, during cooking, the high frequency waves from the antenna 14a of the magnetron 14 pass through the branched high frequency paths 11 of the substantially U-shaped waveguide 10.
Both upper and lower horizontal parts 10a and 10b of the waveguide 10
From each excitation port 12, 13 drilled in the oven 2
The food to be cooked 9 inside can be heated and cooked. That is, the food to be cooked 9 in the oven 2
Since high frequency waves are irradiated from above and below, uneven heating is prevented and starvation fans are not required.

Next, the embodiment shown in FIGS. 6 to 8 is as follows.
This is another embodiment of the present invention, in which the substantially U-shaped waveguide 10 described above is constructed by combining gutter members 10a', 10b', and 10d' divided into three parts, and a magnetron 14. A retaining plate 10e is attached to support the gutter members 10a', 10.
Each tongue piece A for attachment is attached to the periphery of b' and 10d', and this is the same as the above-mentioned embodiment.

[Effect of idea]

As described above, according to the present invention, a top plate 4, a partition plate 5, and a bottom plate 6 which partition the oven 2 and the machine room 3 are provided in the casing body 1, and are arranged approximately along the peripheral wall of the oven 2. A U-shaped waveguide 10 is provided to form a high frequency path 11, one horizontal portion 10b of this waveguide 10 is extended into the oven 2, and the waveguide 10 is connected to the oven 2.
Excitation ports 12 and 13 are provided to communicate with the waveguide 10, and a magnetron 14 is attached to each corner 10c of the waveguide 10.
b is now housed in the oven 2, which allows the entire device to be downsized.
Furthermore, since the excitation ports 12 and 13 of the waveguide 10 are bored facing each other, it is possible to improve the diffused reflection effect of radio waves without providing a starch amp, and it is possible to improve the effect of diffused reflection of radio waves. It has excellent effects such as being able to improve heating efficiency.

[Brief explanation of the drawing]

1 and 2 are diagrams for explaining a conventional high-frequency cooking device, FIG. 3 is a cross-sectional diagram diagrammatically showing the high-frequency cooking device according to the present invention, and FIG. 4 is the same as above. The plan view and FIG. 5 are perspective views showing essential parts of the present invention, and FIGS. 6 to 8 are views showing other embodiments of the present invention. 1...Casing body, 2...Oven, 4...
... Top plate, 5 ... Partition plate, 6 ... Bottom plate, 7 ... Door, 8 ... Shelf board, 9 ... Cooking object, 10 ... Waveguide, 11 ... High frequency passage, 12, 13 ... ...Excitation port, 14...Magnetron.

Claims (1)

[Scope of utility model registration request] A top plate, a partition plate, and a bottom plate are provided in the casing body to separate the oven and the machine room, and a substantially U-shaped waveguide is provided along the peripheral wall of the oven to form a high frequency passage. one horizontal portion of the waveguide is extended into the oven, and each excitation port is provided in the waveguide to communicate with the oven;
A high-frequency heating cooker characterized in that a magnetron is attached to each corner of the waveguide.