JPH11214143A - High frequency heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency heater which can suppress uneven heating and can heat foods uniformly by a simple configuration. SOLUTION: A turn table rotating an object 6 is provided at the bottom of a heating chamber 1, and a magnetron 2 is provided through a waveguide 3 on a side wall of the heating chamber 1 to radiate high frequency electromagnetic waves generated by the magnetron 2 into the heating chamber 1 through the waveguide 3 from a power feed port 4. At this time, an inclined face 7 directed toward the central direction of the turn table 5 is provided on a wall face of the heating chamber 1 opposing to the power feed port in the heating chamber 1 to reflect and refract high frequency electromagnetic waves so that the high frequency electromagnetic waves radiated from the power feed port 4 can be efficiently absorbed in the object to be heated 6 and uneven heating in a central part and an outer peripheral part of the turn table 5 is suppressed to enable uniform heating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating apparatus for heating food, and more particularly to a structure for efficiently and uniformly heating food.

[0002]

2. Description of the Related Art As a method for uniformly heating an object to be heated by a conventional high-frequency heating apparatus, a turntable method for rotating the object to be heated is the most popular, simple and inexpensive method. . The configuration will be described below with reference to FIGS. As shown in the figure, a magnetron 2 for supplying high-frequency electromagnetic waves to the inside of the heating chamber 1 is mounted via a waveguide 3, and on the bottom surface inside the heating chamber 1, a turn that allows the object to be heated 6 to rotate freely. A table 5 is provided. The high-frequency electromagnetic wave generated by the magnetron 2 is transmitted through the waveguide 3 and radiated into the heating chamber 1 from the power supply port 4 provided on the wall surface of the heating chamber 1.

[0003]

In such a conventional method, the object 6 to be heated is rotated by the turntable 5, so that a portion equidistant from the center of rotation is necessarily heated uniformly. Since the intensity of the high-frequency electromagnetic wave radiated from the power supply port 4 is constantly radiated, the higher the frequency is, the closer to the outer peripheral portion of the turntable 5 close to the power supply port 4, the stronger the heating is. And large uneven heating occurs between the central portion and the outer peripheral portion.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to suppress uneven heating at a central portion and an outer peripheral portion and to uniformly heat an object to be heated.

[0005]

According to the present invention, in order to achieve the above object, an inclined surface is provided on a wall surface of a heating chamber facing a power supply port in the heating chamber in a direction of a turntable.

According to the above invention, the high-frequency electromagnetic wave radiated from the power supply port and not directly absorbed by the object to be heated is reflected by the inclined surface directed toward the turntable and collected on the upper surface of the turntable. Accordingly, uneven heating and heating efficiency can be improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a heating chamber for heating an object to be heated in a main body, a magnetron for generating high-frequency electromagnetic waves, a waveguide for guiding high-frequency electromagnetic waves from the magnetron to the heating chamber, A power supply port for radiating high-frequency electromagnetic waves to the chamber wall surface, and a turntable for mounting and rotating the object to be heated in the heating chamber, and the wall surface of the heating chamber facing the power supply port of the heating chamber; An inclined surface facing the turntable is provided.

Since a part of the wall surface facing the power supply port of the heating chamber is inclined in the direction of the turntable, high-frequency electromagnetic waves not absorbed by the object to be heated are also reflected on the inclined surface and collected on the upper surface of the turntable. Therefore, uneven heating and heating efficiency can be improved.

[0009]

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3. FIG.

Reference numeral 1 denotes a heating chamber, and at the bottom of the heating chamber 1, a turntable 5 that rotates with an object 6 to be heated placed thereon is disposed. A power supply port 4 is provided on the side wall of the heating chamber 1, and a part of the side wall of the heating chamber 1 facing the power supply port 4 is inclined in the direction of the turntable to have an inclined surface 7. On the other hand, a magnetron 2 that generates a high-frequency electromagnetic wave is mounted outside the side wall of the heating chamber 1 via a waveguide 3.

Next, the operation and operation will be described. The high-frequency electromagnetic wave generated from the magnetron 2 passes through the waveguide 3 and is radiated from the power supply port 4 into the heating chamber 1. Part of the high-frequency electromagnetic wave radiated from the power supply port 4 is directly absorbed by the object 6 to be heated. The unabsorbed high-frequency electromagnetic waves are also reflected on the inclined surface 7 of the heating chamber 1 facing the turntable 5, so that the high-frequency electromagnetic waves concentrate on the food on the turntable, and the center of the turntable 5 can be heated strongly.

As described above, according to the high-frequency heating device of the embodiment of the present invention, the inclined surface 7 is provided on the wall surface of the heating chamber 1 to change the high-frequency electromagnetic wave, so that the center of the turntable 5 is compared with the outer peripheral portion. This improves the weakness of heating, suppresses uneven heating, and enables the object to be heated to be heated uniformly.

[0013]

As is apparent from the above description, according to the present invention, by providing an inclined surface on the wall surface of the heating chamber facing the power supply port, uneven heating at the center portion and the outer peripheral portion of the turntable is suppressed, and The heating object can be heated uniformly. In addition, the inclined portion can be easily obtained by press working, and since the unevenness of heating is suppressed only by the shape, the performance can be improved at the same cost as the conventional one.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a main part of a high-frequency heating device according to an embodiment of the present invention.

FIG. 2 is a horizontal sectional view of a main part of the high-frequency heating device.

FIG. 3 is a partially cutaway perspective view of the high-frequency heating device.

FIG. 4 is a front sectional view of a main part of a conventional high-frequency heating device.

FIG. 5 is a horizontal sectional view of a main part of the high-frequency heating device.

[Description of Signs] 1 heating chamber 2 magnetron 3 waveguide 4 power supply port 5 turntable 6 object to be heated 7 inclined surface

Claims (1)

[Claims] 1. A heating chamber for heating an object to be heated in a main body, a magnetron for generating a high-frequency electromagnetic wave, a waveguide for guiding the high-frequency electromagnetic wave from the magnetron to the heating chamber, and a high-frequency electromagnetic wave applied to a wall surface of the heating chamber. A feed port for radiating,
A high-frequency heating apparatus, comprising: a turntable on which an object to be heated is placed and rotatable in the heating chamber; and a wall facing the power supply port of the heating chamber, the wall of the heating chamber having an inclined surface facing the turntable.