JPH04188595A - High frequency heating device - Google Patents

Abstract

PURPOSE:To control leakage of microwaves by forming an enclosed space for leak microwaves, which are from a through hole, to be bounded by a motor mounting member and the wall surface of motor. CONSTITUTION:Output shaft 5 of a motor 4 is coupled with a turntable through a drive force transmitting member 7 which penetrates a through hole 6 bored in the bottom wall of a heating chamber. A motor fixture 8 for mounting the motor 4 is equipped with an opening 10 having approx. the same dia. as the outside dia. of a through hole flange 9 in the neighborhood of the through hole 6, and the flange 9 is fitted in this opening and coupled with the through hole 6, and fixation is made by screw to the bottom wall 3 of the heating chamber. The fixture 8 has also a single-piece conical inclined wall 13 which couples the opening 10 and bottom 11 with each other and forms together with the motor upper wall 12, an enclosed space 14 for leak microwaves from the through hole 6. Thereby eventually leaked microwaves from the through hole 6 is suppressed in this enclosed space 14, and does not leak further outside.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a high-frequency heating device that heats an object to be heated with microwaves while rotating it.

(B) Conventional technology In a conventional high-frequency heating device that heats an object to be heated with microwaves while rotating it with a turntable, the turntable is a turntable rotation drive device located below the bottom wall of the heating chamber. It rotates by receiving rotational driving force from the motor via a driving force transmitting body that passes through a through hole in the bottom wall of the heating chamber.

In such a configuration, microwaves leak from the heating chamber through the through hole, and this leaked microwave may cause a malfunction of the control section located in the electrical equipment room within the main body of the high-frequency heating device, or may cause the high-frequency heating to malfunction. Further leakage will occur outside the main body of the device.

In Japanese Patent Publication No. 1-42566, a microwave choke is connected to the through hole in order to suppress such microwave leakage.

However, this microwave choke has a complicated structure and is difficult to process. (c) Problems to be Solved by the Invention The present invention provides a configuration in which a through hole is provided in the bottom wall of the heating chamber through which a driving force transmitting body that transmits the rotational driving force of the motor to the turntable is provided. The aim is to suppress microwave leakage by simplifying the configuration.

(d) Means for Solving the Problems The high-frequency heating device of the present invention includes a heating chamber for performing microwave heating of an object to be heated, a turntable for rotating the object to be heated in the heating chamber, and a turntable. A rotational drive motor, a through hole formed in the bottom wall of the heating chamber, a driving force transmitting body that passes through the through hole and transmits the rotational driving force of the motor to the turntable, and is connected to the through hole. and a motor mounting body for mounting the motor, and the motor mounting body and a wall surface of the motor form a sealed space against leakage of microwaves from the through hole.

(e) Effect Even if microwaves leak from the through hole through which the driving force transmitting body that transmits the rotational driving force of the motor to the turntable passes, this leaked microwave is formed between the motor mounting body and the motor wall surface. It is kept in a closed space and does not leak further to the outside.

Since this sealed space for suppressing microwave leakage is formed using the motor mounting body and the motor wall surface, the FfIt construction does not become complicated.

(f) Example A high-frequency heating apparatus according to an example of the present invention will be described with reference to the drawings. In a heating chamber 1 for microwave heating food, which is an object to be heated, food is placed on a turntable 2. and rotated. On the other hand, a turntable rotation drive motor 4 is provided below the bottom wall 3 of the heating chamber, and the output shaft 5 of this motor 4 is inserted through a through hole 6 formed in the bottom wall 3 of the heating chamber. The turntable 2 is connected to the turntable 2 via a driving force transmitting body 7. -F The rotational driving force of the motor 4 is transmitted to the turntable 2 via the driving force transmitting body 7 in order to rotate the turntable 2.

Further, a motor attachment fitting 8 for attaching the F motor 4 is provided. This metal fitting 8 has an opening 10 having approximately the same diameter as the outer diameter of the through-hole flange 9 near the through-hole 6 marked -F, and is designed so that the flange 9 fits into this opening [-1]. It is connected to the through hole 6 and fixed to the bottom wall 3 of the heating chamber with screws. In this fixed state, the metal fitting 8
A metal upper wall 12 of the motor 4 is attached to the flat bottom wall 1 of the motor 4 in close contact with the flat bottom wall of the motor 4.

The metal fitting 8 has an integral conical inclined wall 13 that connects the opening 10 and the bottom wall 11, and when the motor is attached, this inclined wall 13 forms a through-hole along with the motor upper wall 12. A sealed space 14 is formed against leakage of microwaves from 6.

In such a configuration, even if microwaves leak from the through hole 6, the leaked microwaves are suppressed in the sealed space 14 and do not leak further to the outside, so that the control unit may malfunction due to the leaked microwaves. This will prevent you from doing so.

Further, since the sealed space 14 is formed using the motor mounting fitting 8 and the motor upper wall 12, the structure is not complicated at all.

(1.) Effects of the Invention According to the present invention, in a configuration in which a through hole is provided in the bottom wall of the heating chamber through which the driving force transmitting body that transmits the rotational driving force of the motor to the turntable passes through, the through hole passes through the through hole to the outside. Microwave leakage can be suppressed with a simple configuration.
A practical high-frequency heating device can be provided.

[Brief explanation of drawings]

The drawings show a high-frequency heating device according to an embodiment of the present invention, in which FIG. 1 is an external perspective view, FIG. 2 is a sectional view of a main part, and FIG. 3 is a plan view of a motor mounting fitting. DESCRIPTION OF SYMBOLS 1... Heating chamber, 2... Turntable, 4... Turntable rotation drive motor, 3... Heating chamber bottom wall, 6
...Through hole, 7...Driving force transmission body, 8...Motor access metal fittings, 12...Motor top wall, 14...Closed space.

Claims (1)

[Claims] (1) A heating chamber for performing microwave heating of the object to be heated, a turntable for rotating the object to be heated within the heating chamber, a motor for driving the rotation of the turntable, and a heating chamber formed on the bottom wall of the heating chamber. a through hole, a driving force transmitting body that passes through the through hole and transmits the rotational driving force of the motor to the turntable, and a motor mounting body that is connected to the through hole and for attaching the motor, A high-frequency heating device characterized in that a motor attachment body and a wall surface of the motor form a sealed space against microwave leakage from the through hole.