JPH01256724A - Microwave oven - Google Patents

Abstract

PURPOSE:To improve quietness, cleaning characteristic and convenience in use by a method wherein an inner diameter of a lower part of a supporting table and an inner diameter of a cavity resonator are made substantially the same, and a fixing claw for the supporting table and a flange extending from an upper outer circumference of the cavity resonator are made to be opposite to each other with a bottom surface of a heating chamber inbetween. CONSTITUTION:A flange 26a extending from an upper outer circumference of a cylindrical cavity resonator 26 arranged around a first driving shaft 21 for driving a kneading vane 16 and a fixing claw 13 arranged at a lower outer circumference of a supporting table 12 of a bread container 11 are arranged to be opposite to each other with the bottom surface of the heating chamber 1 inbetween. Mechanical strength of an installing part of the bread container 11 is increased to prevent a noise caused by a vibration at the installed part. A fixing claw 13 arranged at a lower outer surface of the supporting table 12 fixed to the bread container 11 is engaged with a hooking piece 14 fixed to the bottom surface of the heating chamber 1 and then the bread container 11 is fixed to the bottom surface of the heating chamber 1. In addition, an upper flat heater 6 and a lower flat heater 8 are provided and a heater is eliminated from within the heating chamber 1, an effective space within the heating chamber 1, in particular its height is increased to facilitate its fixing or removal.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a high frequency heating device having a food hiding function.

2. Prior Art A conventional high-frequency heating device of this type was developed in Japanese Utility Model Publication No. 61-423.
This is proposed in Publication No. 82. In this proposed configuration, the upper heater and lower heater are built into the heating chamber.
When the fixing piece protruding from the bottom of the kneading machine is inserted into the mounting hole provided on the bottom of the heating chamber and rotated by a predetermined angle, the fixing claw formed on the fixing piece will catch on the back side of the bottom of the heating chamber.
The kneader can be attached to the heating chamber.

Problems to be Solved by the Invention According to the above configuration, (a) Since the kneader is fixed and held by the bottom of the heating chamber itself, vibrations caused by insufficient mechanical strength of the bottom of the heating chamber during the kneading process generate noise. There is a great possibility that it will become a source.

(b) A mounting hole is provided at the bottom of the heating chamber for mounting the kneader inside the heating chamber. During this fixing, it is necessary to insert the fixing piece into the hole and rotate it by a predetermined angle, so the hole has to be large. Therefore, there is a strong possibility that a large amount of food particles, liquid juice, etc. may flow out from this hole, causing an inconvenience.

(e) Since both the upper heater and the lower heater are located within the heating chamber, they become a nuisance when the kneading machine is put in and taken out, and the effective space in the heating chamber, particularly the height, becomes small.

There were problems like.

The purpose of the present invention is to solve the above-mentioned problems and improve quietness, cleanability,
An object of the present invention is to provide a high-frequency heating device with a stirring function that is easy to use.

Means for Solving the Problems The high-frequency heating device of the present invention uses a high-frequency oscillator, an upper flat heater, and a lower flat heater as heating sources, and includes a heating chamber having at least a bottom surface made of a non-magnetic metal plate; A bread container that performs everything from kneading bread ingredients to baking, a plurality of fixing claws provided on the lower outer surface of a cylindrical support fixed to the bottom of the bread container to hold the bread container on the bottom of the heating chamber, and a heating A hook piece that is fixed to the bottom of the chamber and engages with the fixing claw, a first drive shaft that drives the kneading blades in the bread container through the through hole in the bottom of the heating chamber, and a hook provided around the drive shaft. a cylindrical cavity resonator for radio wave sealing, the inner diameter of the lower part of the support base and the inner diameter of the cavity resonator are approximately the same, and a fixing claw of the support base and a flange extending from the outer periphery of the upper part of the cavity resonator; are arranged to face each other across the bottom of the heating chamber.

Effect With the above configuration, (a) the flange extending from the upper outer periphery of the cylindrical cavity resonator provided around the first drive shaft that drives the kneading blades and the fixing claw provided on the lower outer periphery of the support base of the bread container; Since they are arranged to face each other across the bottom surface of the heating chamber, the mechanical strength of the bread container mounting portion is increased, and noise caused by vibration of the bottom surface of the heating chamber during the kneading process can be prevented.

(b) The bread container can be fixed in the heating chamber by engaging the fixing claw provided on the outer surface of the lower part of the support base fixed to the container with the hook piece fixed to the bottom of the heating chamber. There is no need to make a hole in the bottom of the heating chamber.

(C) Using an upper plane heater and a lower plane heater,
The heater is removed from the heating chamber so that the heater does not get in the way when attaching and detaching the bread container, and the effective space in the heating chamber, particularly the height, can be increased.

Example An embodiment of the present invention will be described in detail below with reference to the drawings.

First, FIG. 1, which is a schematic cross-sectional view of the high-frequency heating device of the present invention when used as an automatic bread maker, will be described. With reference to this diagram, the present device will be explained by dividing it into five components according to function. That is, as these components, the first one is related to high frequency heating, the second one is related to heater heating,
The third is related to the bread container, the fourth is related to the rotation amount moving part, and the fifth is related to the outer shell. However, the number of members for attaching each element and auxiliary electrical parts shall be kept to the minimum necessary.

Each component will be explained below.

The components related to high frequency heating will be explained.

Reference numeral 1 denotes a heating chamber surrounded by a metal plate that reflects high frequency energy and is provided in a high frequency heating device. This heating chamber 1 has at least a bottom surface made of a non-magnetic metal plate, for example 5US304.
It is formed of. Reference numeral 2 designates a high frequency oscillator 1, such as a magnetron, which supplies high frequency energy into the heating chamber 1 through a waveguide 3. 4 is a coupling port between the waveguide 3 and the heating chamber 1, from which high frequency energy is irradiated into the heating chamber 1. 5 is a cooling fan for cooling the high frequency oscillator 2.

The components related to heater heating will be explained.

6 is an upper plane heater attached to the outside of the upper surface of the heating chamber 1. 7 is a heat insulating material that prevents heat from escaping to the top so that the heat from the upper flat heater 6 is efficiently irradiated into the heating chamber 1 through the upper surface of the heating chamber 1. 8 is a lower flat heater attached to the outside of the bottom of the heating chamber 1. 9
is a heat insulating material that prevents heat from escaping below the lower plane heater 8. Reference numeral 10 denotes a holding fitting for holding the lower flat heater 8 and the heat insulating material 9 on the outside of the bottom surface of the heating chamber. However, the mounting member of the presser metal fitting IO itself is omitted.

The components related to bread containers will be explained.

Reference numeral 11 denotes a bread container in which at least one side of the inlet is made of a metal molded product such as aluminum whose high frequency energy is larger than 1/2 of the wavelength used, or a dielectric molded product such as Pyrex that transmits high frequency waves. 12 is a cylindrical support stand fixed to the lower part of this container 11. To fix the bread container 11 in a predetermined position, rotate the bread container 11 by a predetermined angle,
Fixing claws 13 provided on the outer surface of the lower part of the support base 12 are connected to the heating chamber 1.
It engages with a hook piece 14 fixed to the bottom surface of. Reference numeral 15 indicates a bread raw material consisting of wheat flour, water, yeast, etc., and FIG. 4 shows the cross-sectional shape of the so-called mountain-shaped bread after baking.

16 is a kneading blade for kneading the bread raw material 15 and degassing it. Reference numeral 17 denotes a rotating shaft that detachably supports and rotates the kneading blades 16. 18 is an oil seal made of silicone rubber or the like. Reference numeral 19 denotes a bearing that rotatably supports the rotating shaft 17. Reference numeral 20 is a driven piece whose upper part is fixed to the rotation shaft 17 and whose lower part engages to form one side of the clutch.

Components related to the rotation drive section will be explained.

Reference numeral 21 denotes a drive piece whose upper part is fitted with the driven piece 20 through the through hole 1a of the heating chamber 1 to form one side of a dog clutch, and whose lower part is a first drive shaft connected to a large pulley 22. . A belt 23 rotatably connects the large pulley 22 and the small pulley 24.

25 is a small pulley 24 for rotating the kneading blade 16.
For example, the kneading blades 16 are moved by a kneading motor connected to
Rotate at a high speed of about 00 rpm. Reference numeral 26 denotes a cylindrical cavity resonator that takes in high frequency energy that would otherwise leak out of the heating chamber 1 along the movement axis 21 and prevents it from being released. A first drive shaft 2 is provided on the wall surface of the hollow part of this resonator 26.
1 is fitted with a bearing (circuit) that supports it rotatably.

The inner diameter of the cavity resonator 26 is approximately the same as the inner diameter of the lower part of the support base 12 described above, and the flange 26a extending from the upper outer circumference of the cavity resonator and the fixing claws on the lower outer circumference of the support base 12 touch the bottom surface of the heating chamber 1. I try to face him in person.

The components related to the outer shell will be explained.

27 is an outer box made of a conductor. A door 28 opens and closes the front entrance of the heating chamber 1, and is used to minimize the release of high frequency energy and heater thermal energy to the outside during heating. Reference numeral 29 is a control panel for selecting a bread baking sequence as an automatic bread maker, or a heating operation as an oven range or single-function microwave oven. Reference numeral 30 is a leg for separating the entire device from the installation surface and preventing damage to the installation surface.

Next, components related to the rotational movement of the object to be heated 31 are set in the heating chamber 1 instead of the components related to the bread container shown in FIG. FIG. 2, which shows a schematic cross-sectional view, will be explained.

32 is a turntable on which the object to be heated 31 is placed and moved one rotation. 33 is a rotary table that detachably supports the turntable 32 and rotates it. 34 is a second drive shaft that detachably supports and drives the rotary table 33. 35 is a table motor that is connected to the second drive shaft 34 through a plurality of gears (circuits) and rotates the turntable 32 at a low speed of, for example, 5 to 1 Orp. The second moving shaft 34 passes through the center axis of the first moving shaft 21, so that the two shafts 34 and 21 rotate independently of each other.

The functions and effects of the above configuration will be described.

Due to the following (a), (b), and (c), the high-frequency heating device of the present invention is quiet, easy to clean, and easy to use.

(,) During the kneading process, a cylindrical cavity resonator 26 installed around the first drive shaft 21 that drives the kneading blades 16 is used to prevent noise caused by the vibration of the attachment part of the bread container 11 on the bottom of the heating chamber 1. The flange 26a extending from the upper outer periphery and the fixing claw 13 provided on the lower outer periphery of the support base 12 of the bread container 11 are arranged so as to face each other across the bottom surface of the heating chamber 1, and This increases the strength of the objective.

(b) In order to fix the bread container 11 to the bottom surface of the heating chamber 1, the fixing claw 13 provided on the lower outer surface of the support stand 12 attached to the bread container 11 is engaged with the hook piece 14 fixed to the bottom surface of the heating chamber 1. Therefore, the hole for fixing the bread container 11 is located in the heating chamber 1.
There is no need to make a hole at the bottom.

(c) In order to facilitate attachment and detachment of the bread container 11, an upper plane heater 6 and a lower plane heater 8 are provided, and the heaters are removed from the heating chamber 1, thereby increasing the effective space, especially the height, within the heating chamber 1. ing.

Furthermore, in order to effectively use the space in the height direction within the heating chamber 1, it is preferable that the position of the contact surface between the support stand 12 and the bottom surface of the heating chamber 1 be as low as possible. therefore.

If holes are made in this contact surface, a large amount of food particles and liquid juices will easily flow down, which is undesirable.

On the other hand, there is a through hole 1a on the bottom surface of the heating chamber 1 through which the dog clutch part passes, and the vicinity of this hole 1a is made convex to prevent food particles and liquid juice from flowing down.

In addition, in the present invention, when it is detected that a cooking container is fixed in the heating chamber, a control circuit centered on a microcomputer controls the sequence from kneading bread to baking, as well as the sequence such as mochi mochi and rice cooking. Applicable to high-frequency heating equipment that is automatically selected from a control panel.

Effects of the Invention According to the present invention, it is possible to provide a high-frequency heating device that is quiet, easy to clean, and has multiple functions such as an automatic bread maker (home bakery), an oven range, and a single-function microwave oven.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main parts when the high-frequency heating device of the present invention is used as an automatic bread maker, and Figure 2 is a sectional view of the main parts when it is used as an oven range or single-function microwave oven. It is. 1...Heating chamber, 1a...Through hole, 2...
・High frequency oscillator, 6... Upper plane heater, 8.
...Lower plane heater, 11...Bread container, 12...
・Support stand, 13...Fixing claw, 14...
Hook piece, 15... Bread raw material, 16... Kneading blade, 21... First drive shaft, 26... Cavity resonator, 26a... Flange. Hitachi Thermal Equipment Co., Ltd. 2II] Island! 2111 Toyshan glaze 1BO room

Claims (1)

[Claims] a heating chamber (1) using a high frequency oscillator (2), an upper plane heater, and lower plane heaters (6) and (8) as heating sources;
A bread container (11) in which the bread ingredients (15) are kneaded and baked in the heating chamber (1);
11) on the bottom surface inside the heating chamber (1), a plurality of fixing claws (13) provided on the lower outer surface of the cylindrical support base (12) fixed to the lower part of the bread container (11), and the heating chamber (1)
A hook piece (14) that is fixed to the bottom surface of the bread container and that engages with the fixing claw (13), and a kneading blade (1) inside the bread container (11).
6) through the through hole (1a) in the bottom of the heating chamber (1), and a cylindrical cavity resonator (21) for radio wave sealing provided around this drive shaft (21). 26), the lower inner diameter of the support base (12) and the inner diameter of the cavity resonator (26) are approximately the same, and the fixing claw (13) of the support base (12) and the inner diameter of the cavity resonator (26) are substantially the same. A high-frequency heating device characterized in that a flange (26a) extending from an upper outer periphery faces each other across the bottom surface of a heating chamber (1).