JPH07318078A - High frequency heater - Google Patents

Abstract

PURPOSE:To eliminate unevenness in the heating for food with a simple construction. CONSTITUTION:A high frequency heater has a rotary plate 2, provided on the bottom part of a heating chamber 1, which is driven to rotate by a driving motor 3. The rotary plate 2 is vertically movably mounted and respective rollers 12 on a roller base 10 for supporting the rotary plate 2 are formed so that their rotating periphery surfaces are located at different distances from the center of rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for uniform irradiation of high frequency in a high frequency heating device.

[0002]

2. Description of the Related Art In a high-frequency heating device, food is placed on a rotating plate and rotated so that high-frequency waves are uniformly irradiated from different directions, thereby preventing uneven heating of the food. There is.

[0003]

However, by simply irradiating the food with a high frequency while rotating the food as described above, the irradiation direction of the high frequency on the food is apt to be biased obliquely upward and the uneven heating cannot be eliminated. It was

Therefore, a stirring blade is provided in the heating chamber to irradiate food while stirring high frequency.
In this case, a separate stirring blade and its accessories are required, which complicates the assembly and raises the cost.

Further, in the invention of Japanese Patent Laid-Open No. 52-3743, an annular concave and convex gear is formed on the outer peripheral position of the bottom surface of the rotary dish, and the gear driven by the motor is meshed with the gear to form the motor. By driving it, the rotating dish is rotated while moving up and down, and the food is evenly irradiated with high frequency to prevent uneven heating, but with this type, the rotating dish is driven to rotate at an eccentric position. The rotation is not stable, and the bottom surface of the rotary dish requires an uneven ring-shaped gear, which complicates the configuration and requires time and labor to manufacture.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to eliminate heating unevenness of food with a simple structure.

[0007]

According to the present invention, in a high-frequency heating apparatus in which a rotary plate rotatably driven by a motor is provided at the bottom of a heating chamber, the rotary plate is provided so as to be vertically displaceable, and the rotary plate is also movable. Each of the rollers of the roller base that supports the roller is formed so that its rotation peripheral surface is located at a different distance from the rotation center.

[0008]

According to the present invention, the rotary dish can be displaced vertically,
Since each roller of the roller base is formed so that its rotation peripheral surface is located at a different distance from the center of rotation, when the roller rotates during rotation of the rotary plate, the height position of the rotation peripheral surface in contact with the rotary plate moves up and down. , By this, the rotating dish moves up and down.

[0009]

1 is a block diagram of a heating chamber of a high-frequency heating apparatus according to the present invention, in which a rotary plate 2 is provided at the bottom of the heating chamber 1 so as to be rotated by a drive motor 3.

FIG. 2 is a partially enlarged view showing the mounting structure of the rotary plate 2 on the drive shaft 4 of the drive motor 3. A cap 6 is fixedly attached to the tip of the drive shaft 4, and the cap 6 is attached to the upper part of the cap 6. Is provided with a pair of locking portions 5 protruding laterally. On the other hand, a cylindrical portion 7 is provided at the center of the bottom surface of the rotary plate 2, and a pair of cutout portions 8 are formed at the lower portions on both sides of the cylindrical portion 7. Then, each of the locking portions 5 is engaged with the cutout portion 8 from below, the cap 6 is inserted into the cylindrical portion 7, and the rotary dish 2 is attached to the drive shaft 4.

As described above, since the locking portion 5 is locked to the cutout portion 8, the rotary plate 2 rotates with the rotation of the cap 6 when the drive motor 3 is driven, and the locking portion 5 cuts. By being able to move up and down in the notch portion 8, the rotating dish 2 can be displaced up and down.

Reference numeral 10 denotes a roller base, which is shown in FIGS.
As shown in (B), a roller arm 11 that branches in three directions
And three rollers 12 rotatably supported at the ends of the branches. The roller base 10 is rotatably provided by being inserted into the drive shaft 4, and each of the rollers 12 supports the bottom surface of the rotary plate 2. Then, each of the rollers 12 is
Its shape is elliptical.

As described above, since the rotary plate 2 is provided so as to be vertically displaceable and each of the rollers 12 has an elliptical shape, when the roller 12 rotates during the rotation of the rotary plate 2 at the time of heating, the rotation circumference of the roller 12 is reduced. The height position of the surface in contact with the rotary dish 2 moves up and down, whereby the rotary dish 2 moves up and down. In this way, the food on the rotary dish 2 is displaced in the vertical direction in addition to the planar displacement due to the rotational movement, so that a three-dimensional displacement is made as a whole, and as a result, the high frequency waves from the magnetron are evenly distributed. The food is irradiated and the food is uniformly heated.

In the above embodiment, the roller 12 has an elliptical shape, but may have any shape other than a circular shape as long as the rotation is not hindered.

[0015]

According to the present invention, it is possible to rotate the rotating tray while moving it up and down with a simple structure in which the rotating tray is provided so as to be vertically displaceable and the roller shape of the roller base is changed. By sterically displacing the food, the high frequency from the magnetron can be evenly applied to the food, and as a result, uneven heating of the food can be reliably eliminated.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a heating chamber of a high-frequency heating device according to the present invention.

FIG. 2 is a partially enlarged view showing a mounting structure of a rotary dish on a drive shaft.

FIG. 3 is a view showing a roller base, (A) is a plan view,
(B) is a front view.

[Explanation of symbols]

 1 Heating Chamber 2 Rotating Dish 3 Drive Motor 10 Roller Stand 12 Roller

Claims (1)

[Claims] 1. A high-frequency heating device comprising a rotary plate rotatably driven by a drive motor at the bottom of a heating chamber, wherein the rotary plate is vertically displaceable, and
A high-frequency heating apparatus, characterized in that each roller of the roller base that supports the rotary dish is formed so that its rotation peripheral surface is located at a different distance from the rotation center.