JPS581996Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high frequency heating device equipped with a so-called turntable.

High-frequency heating devices with good uniform heating characteristics, so-called microwave ovens, have a rotating food table called a turntable. There are drawbacks.

One of these is that it is very difficult to move the food table in and out when food is placed on the food table, and because the food table and the drive shaft that drives it are fitted together, it is difficult to take out the food table. In some cases, it is necessary to lift the mounting table upward and then pull it out in that state.

If the food is heavy, you will need to use both hands, but food tables are generally the same size as the bottom of the heating chamber in order to increase the effective surface area, making it difficult to reach from the left and right sides.
Furthermore, even if a hand were to enter the heating chamber, the effective volume of the heating chamber would be reduced by the amount of lifting the mounting table upward.

In any case, in the conventional method, the food table is rotated by a locking piece of the drive shaft installed in the center of the bottom of the heating chamber, so it was difficult to create a structure that simultaneously satisfied the mutually contradictory functions of rotation and ease of removal. .

Another disadvantage is that it is difficult to clean.

Unlike other cooking appliances, the microwave oven only heats the food being heated, and the heated items do not get hot.The advantage of a microwave oven is that there is no chance of food particles clinging to the heating wall, and it can always be kept clean. There is one.

However, conventional turntables have a hole in the center of the bottom for the drive shaft to pass through, and a support that supports the periphery of the mounting table is installed at the bottom of the heating chamber, making it difficult to clean the case. Even if it was cleaned, it could not remove the things that had gotten into the planted parts, making it a step backwards as a clean cooking utensil.

Generally, a device equipped with rollers consists of a rotating body, a shaft that supports it, and a frame. Naturally, there is a gap between the rotating body and the frame, which prevents oil and juice from getting in during cooking. It was not possible to completely remove the liquid, which could be caused by odors, etc.

Therefore, the present invention aims to eliminate the above-mentioned drawbacks and provide a turntable that allows the placing table to be moved in and out even when food is placed on the casing 1, and in particular, the roller portion can be easily cleaned.The following is an implementation of the present invention. An example will be described with reference to the accompanying drawings.

The heating chamber 1 is constructed of a thin stainless steel plate, for example, SUS 304.

The high frequency waves generated by the magnetron (not shown) are transferred to the waveguide 2.
The waveguide terminal end 3 is made to protrude vertically into the heating chamber 1 from the center of the upper surface of the heating chamber.

A stirrer support 4 made of a resin with low high frequency loss, such as polypropylene, is fixed to the tip of the waveguide end 3 with screws.

Furthermore, a stirrer blade 5 is rotatably provided on the support column 4, and although not shown, it is rotated by forced cooling air from a magnetron.

In addition, a partition plate 6 made of a silicon-impregnated glass cloth laminate is provided to protect a portion of the starrer.

Further, a door 8 is provided opposite the lower part between the heating chambers, and is attached to the heating chamber 1 with a hinge 9 so as to be rotatable.

Further, the bottom surface 10 of the heating chamber 1 is provided with a truncated cone-shaped embossed portion 11 having an inclination of approximately 45°.

The rotary table 12 has a circular plane part 13 on the upper surface, an outer inclined part 15 on the outside thereof, and three pillars facing outward in the axial direction, having an angle of 120 degrees to each other, and provided at equal distances from the center of the rotary table 12. 16. It has a silicone rubber roller 17 rotatably attached to the column 16 and three magnets 18 fixed by screws, and is removably placed in the embossed part 11 on the bottom of the heating chamber.

A bottom plate 19 of the housing is screwed to the heating chamber 1, and a ball bearing 20 and a motor 21 are attached to the top surface thereof.

A shaft 22 made of resin such as polyacetal is attached to the ball bearing 20, and a gear 23 made of the same material as the shaft is fixed to the shaft 22 and meshed with the motor 21.

A strong ferrite magnet 24 is adhesively fixed on the gear 23 at a position corresponding to the magnet 18 of the rotating table 12.

Note that the magnets 18 and 24 have polarities that repel each other.

In addition, the roller 17 has a bearing portion 2 made of iron plated with chrome.
5 and a peripheral part made of rubber, the cut magnet 18 is made up of an internal circular ferrite magnet 27 and a threaded metal case 28 covering the outside thereof.

When inserting the roller 17 into the support 16,
Since it is a simple cylinder, it can be easily inserted, and the bearing portion 25 is attracted to and held by the circular ferrite magnet 27.

If you want to remove it, just pull it with a force greater than the attractive force of this magnet.

In addition, the open door 8 and the bottom surface 10 of the heating chamber are made at the same height, and the circular plane part 13 of the rotary table is made slightly higher than this.
If a slope 30 corresponding to the inner slope 15 of the rotating table 12 is provided at the bottom of the food placing table 29 made of heat-resistant glass, the food placing table 29 can easily slide between the door 8 and the rotating table 12. You can go in and out.

As explained above, according to the present invention, there are no holes or plants at the bottom of the heating chamber, so cleaning is easy.

By attaching rollers and magnets to the rotary table, positioning can be easily performed by simply placing the rotary table in the heating chamber and using the attractive force of the magnet.

In addition, if the roller becomes dirty with dirt, oil, etc., the distance between the bottom surface and the magnet changes, or the frictional force between the roller and the bottom surface increases, this can lead to defects such as uneven rotation of the turntable and a decrease in rotational torque. The fact that it can be removed and washed with water is a great advantage in reducing such defects and further improving the performance of the removable rotary table.

The shredded food table can also be taken in and out easily, which solves the drawbacks of the conventional rotary placement system, such as the difficulty in cleaning the inside of the heating chamber and the difficulty in putting in and taking out the food table. .

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main part of a high-frequency heating device showing an embodiment of the present invention, Fig. 2 A is a front view and side view of the main part of the rotary table, and Fig. 3 is a cross-section of the main part of the roller. FIG. 4 is a partial cross-sectional view showing the roller mounted on the rotary table. 1...Heating chamber, 10.2...Heating chamber bottom,
12.1.1. . Rotating table, 17... roller, 18... magnet, 24... ferrite magnet.

Claims (1)

[Scope of utility model registration request] A magnet is installed close to the outer bottom of the heating chamber and driven to rotate on a horizontal plane near the outer bottom, and the inner bottom of the heating chamber is made of a flat surface with no through holes or plants. A rotary table driven by the rotation of the magnet is detachably provided, and the rotary table is provided with at least three magnets and three rollers on the same circumference, and the three rollers are connected to the three rollers of the rotary table. @
High frequency heating device held magnetically by magnets.