JPS5839281Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high-frequency heating device in which the structure of the partition plate inside the high-frequency heating chamber is improved.

A partition plate is installed in a high-frequency chamber of a high-frequency heating device, such as a microwave oven, in order to protect parts such as a magnetron dome and a stirrer fan from a space on the side where the food to be heated is installed.

Conventionally, polypropylene or the like has been used as the material for the partition plate.

However, the above-mentioned conventional materials have been problematic in that they may burn out or burn due to heating caused by food ignition or sparks caused by throwing in metal pieces.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to improve the heat resistance of the partition plates installed in the high-frequency heating chamber without damaging their electrical characteristics. An object of the present invention is to provide a high-frequency heating device that does not cause burning or combustion.

FIG. 1 and FIG. 2 each show a microwave oven as an embodiment of the present invention.

In the figure, 1 is the main body of the microwave oven, and a high-frequency heating chamber 2 is formed within the main body 1 of the microwave oven.

Additionally, star fans 3 and 4 are installed on the ceiling of the high-frequency heating chamber 2, respectively.

Further, in the microwave oven shown in FIG. 1, a magnetron dome 5 is provided at the upper part of the back surface.

On the other hand, in the microwave oven shown in FIG. 2, a magnetron dome 6 is installed on the ceiling.

In such a high frequency heating chamber 2, a partition plate 7 is provided.
, 8.9 are installed to partition the starvation fan 3.4 and magnetron domes 5, 6 from the installation space 11 side of the food to be heated 10, and to protect each of the above components.

The partition plates 7, 8.9 are formed into plate shapes by applying a heat-resistant adhesive to mica, laminating and curing the adhesive.

Peeling mica and laminated mica are used as the above-mentioned mica, and both have good electrical properties as well as heat resistance, so they are desirable as materials for the partition plates 7 and 8.9, but as a single substance, they are in powder form. It has the disadvantage of being easy to use and having extremely low mechanical strength.

However, by applying a heat-resistant adhesive to mica and curing it in layers, it is possible to obtain sufficient strength to use it as the partition plates 7, 8, 9.

As the heat-resistant adhesive, heat-resistant resins such as silicone, polyester, acrylic, Teflon, and polyester are used.

Then, by coating mica with a heat-resistant resin and applying heat to harden it into a predetermined shape, it is formed into a plate shape of, for example, 0.2 mm or more.

Next, typically for resin, place a metal piece on the partition plate obtained using laminated mica, place it in the high frequency heating chamber 2 of the microwave oven, run the microwave for 1 minute, and consciously Experimental examples in the case of sparking are shown in Tables 1 and 2 below.

Although not shown in this table, the material thickness of the silicon laminate is 1. Even with Ot, sparks will cause burnout and holes.

As can be seen from the results of this experiment, embodiments that are generally considered desirable include: (1) Mixing mica with silicone resin of 40% or less by weight and heat curing it to a thickness of 0.2 mm or more; ■ Mica and 30% or less epoxy resin by weight (in this case, acid anhydride-cured one is preferable).

) may be applied and heat cured to a thickness of 0.2 mm or more.

Note that the amount of adhesive is preferably in the range of 20 to 5%.

Further, in the partition plate having the above structure, in order to impart smoothness and hardness to the plate surface, it is preferable to coat both or one side with a heat-resistant resin, such as silicone.

In this way, when cleaning, it is easy to wipe off dirt, and the dirt itself is not attached, making it sanitary.

In addition, for strength reinforcement or economic efficiency, asbestos,
A composite body impregnated with an equivalent resin such as glass cloth or glass paper and combined with a mica layer on the surface to form a pressed bottom shape may also be used.

Alternatively, a suitable heat-resistant film may be attached to the surface of the mica layer.

As explained above, the partition plate of the present invention is made by coating mica with a heat-resistant adhesive and laminating and curing it to a thickness of 2 mm or more. can be used to form a partition plate.

That is, it is possible to improve not only the electrical properties of the partition plate but also its heat resistance, and maintain the mechanical strength of the partition plate.

Therefore, it is possible to provide a safe partition plate that has good electrical characteristics, good heat resistance, and will not burn out or burn out.

[Brief explanation of the drawing]

1 and 2 are side views each schematically showing an embodiment of the present invention. 1... Apparatus body, 2... High frequency heating chamber, 3, 4... Stara fan, 5, 6...
- Magnetron dome, 7,8°9...Partition plate, 10...Food to be heated, 11...Installation space.

Claims (3)

[Scope of utility model registration request] (1) In a high-frequency heating device in which a partition plate is installed in a high-frequency heating chamber, the partition plate is coated with a heat-resistant adhesive on mica to a weight ratio of 30% or less, and then laminated and cured to a thickness of 2 mm or more. A high frequency heating device characterized by: (2) The high-frequency heating device according to claim 1, which uses laminated mica or peeled mica as the mica. (3) The high-frequency heating device according to claim 2, which uses a thermosetting resin as the heat-resistant adhesive.