JPH01296017A - High frequency heating device - Google Patents

Abstract

PURPOSE:To improve facility and cleaning ability, by a method wherein a high frequency oscillator and an upper flat and a lower heater form a heating source, a catch piece engaged with a claw for securing located on the outer surface of the lower part of a support stand secured to a bread container is located to the bottom of a heating chamber. CONSTITUTION:A high frequency oscillator 2 feeds high frequency energy to the interior of a heating chamber 1 through a waveguide 3. An upper flat heater 6 is mounted on the upper side of the upper surface of a heating chamber 1. A lower heater 8 is mounted in a dent 1b of the bottom of the heating chamber 1 and in a level lower that of the bottom of a bread container 11. The bread container 11 is formed by a metal or a dielectric molded product, and a support stand 12 is secured to the lower part thereof. A claw 13 for securing situated on the outer surface of the lower part of the support stand 12 is engaged with a catch piece 14 secured to the bottom of the heating chamber 1, and is secured in a position. A blade 16 to knead a raw material 15 and bleed gas is removably supported on a rotary shaft 17.

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 stirring function for food.

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 is disposed downward and away from the upper surface of the heating chamber. The lower heater is disposed floating above the bottom surface of the heating chamber, and is located above the bottom surface of the kneader. Furthermore, the bottom of the kneader is in direct contact with the bottom of the heating chamber. When the fixing piece protruding from the bottom of the kneader 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, and the kneading machine will The device can be attached to the heating chamber.

Problems to be Solved by the Invention According to the above configuration, (a) When fixing the kneader to the bottom of the heating chamber, it is necessary to insert the fixing piece into the hole and rotate it by a predetermined angle; I have no choice but to do so. 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.

(b) The upper beater is placed downward from the top of the heating chamber, and the lower heater is placed floating above the bottom of the heating chamber, so it gets in the way when putting in and taking out the kneader, and The effective space, especially the height, is reduced.

(c) The lower heater is located above the kneader,
Because the bottom of the dough kneader is in direct contact with the bottom of the heating chamber, the heating of the bottom and top portions of the bread dough placed in the dough becomes uneven.

There were problems like this.

An object of the present invention is to solve the above-mentioned problems and provide a high-frequency heating device with a stirring function that is easy to use, easy to clean, and has a good finish.

Means for Solving the Problems The high-frequency heating device of the present invention uses a high-frequency oscillator, an upper plane heater, and a lower heater as heating sources, and includes a heating chamber whose bottom surface is made of a non-magnetic metal plate, and a forced heating chamber inside the heating chamber. A circulation blower is installed on the outside of the side wall of the heating chamber to create convection, and a bread container is used for everything from kneading bread ingredients to baking inside the heating chamber.

In order to hold the bread container on the bottom surface of the heating chamber, a fixing claw is provided on the outer surface of the lower part of the support stand fixed to the bottom of the bread container, and a hook piece is fixed to the bottom surface of the heating chamber and engages with the fixing claw. It is equipped with the following.

Further, the lower heater is disposed in a recess in the bottom of the heating chamber and is located below the bottom of the bread container. Further, an upper plane heater is disposed above the upper surface of the heating chamber.

Effects With the above configuration, (a) 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 fixed to the bottom surface of the heating chamber; There is no need to make holes for fixing the container on the bottom of the heating chamber.

(b) The upper flat heater placed above the top of the heating chamber and the lower heater installed in the recess on the bottom of the heating chamber are used to prevent the heater from getting in the way when the bread container is attached or removed, and to prevent the heating chamber from getting in the way. The effective space, especially the height, can be increased.

(C) Two-stage cooking is possible by forcing thermal energy from the upper flat heater and the lower heater to be forced into convection by a circulation blower installed on the outside of the side wall of the heating chamber. This is convenient for carrying out the primary fermentation of sweet bread, pizza, etc. in a bread container, and then dividing the container into two stages and baking them simultaneously. This is because the internal volume of the bread container is quite large, and the secondary fermentation
This is because the volume increases during the baking process, making it increasingly necessary to bake in two stages at the same time.

(d) When using a bread container, the lower heater is mainly used to perform primary fermentation, secondary fermentation, and baking, but since the lower heater 8 is located lower than the bottom of the bread container, natural convection and radiation cause the upper part of the dough to rise. The lower part can be heated evenly.

Example The present invention will be described in detail below with reference to the drawings.

First, a description will be given of FIG. 1, which is a schematic cross-sectional view when the high-frequency heating device of the present invention is used as an automatic bread maker (home bakery). With reference to this diagram, the present device will be explained by dividing it into five components according to function. That is,
The first component is related to high frequency heating, the second component is related to high frequency heating.
The third is related to the heater heating, the third is related to the bread container, the fourth is related to the rotation drive unit, 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. Reference numeral 2 denotes a high frequency oscillator, such as a magnetron, which supplies high frequency energy into the heating chamber 1 through a waveguide 3. Reference numeral 4 denotes 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.

Reference numeral 6 denotes an upper plane heater attached to the upper side 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. Reference numeral 8 denotes a lower heater disposed in the recess lb in the bottom of the heating chamber 1 and located below the bottom of the bread container 11. The upper flat heater 6 is used for grilled food, or is alternately energized with the lower heater 8 and used for general oven cooking.

The lower heater 8 is used for primary fermentation, secondary fermentation, baking, etc. when the bread container 11 is used, by heating intermittently.

When using the bread container 11, not only the lower heater 8 but also the upper flat heater 6 may be used as an auxiliary device. This is a circulation blower attached to the outside of the side of the heating chamber.

1d is an inlet of the circulation blower 9, and IC is an outlet. Reference numeral 10 denotes a circulation chamber in which a circulation blower 9 is housed.

The components related to bread containers will be explained.

Reference numeral 11 denotes a bread container having at least one side of the inlet made of a fully bent molded product such as aluminum whose inlet side is larger than the wavelength 172 used for high-frequency energy, or a dielectric molded product such as Pyrex that transmits high-frequency waves. 12 is a support stand fixed to the lower part of this container 11. To fix the bread container 11 in a predetermined position, the bread container 11 is rotated by a predetermined angle, and the fixing claw 13 provided on the outer surface of the lower part of the support base 12 is engaged with the hook piece 14 fixed to the bottom surface of the heating chamber 1. match. 15 is flour,
It is a bread ingredient consisting of water, yeast, etc., and Figure 1 shows the so-called mountain-shaped cross-sectional shape of bread after baking. 16
is a kneading blade for kneading the bread ingredients 15 and removing gas. 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 driving 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 connected to the large pulley 22. It is a moving axis. 23 is a large pulley 22 and a small pulley 24
This is a belt that rotatably connects the

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 high speed of 00 rpm. 26 is the drive shaft 21
This is a cavity resonator that captures high frequency energy that would otherwise leak to the outside of the heating chamber 1 along the lines and prevents it from being released. The wall surface of the central hollow part of this resonator 26 has a first! #!
A bearing (circuit) that rotatably supports the moving shaft 21 is fitted.

The components related to the outline will be explained.

27 is an outer box made of a conductor. Reference numeral 28 denotes a door that 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 used to separate the entire device from the installation surface and prevent damage to the installation surface.

Next, a schematic cross-sectional view of the case where 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. 1, and used as a single-function microwave oven. FIG. 2 showing this will be explained.

32 is a turntable on which the object to be heated 31 is placed and rotated. Reference numeral 33 denotes a rotary table that detachably supports the turntable 32 and rotates it once. 34 is a second drive shaft that detachably supports and drives the rotary table 33. 35 is the second
It is a table motor that is connected to the drive shaft 34 via a plurality of gears (circuits) and rotates the turntable 32 at a low speed of, for example, 5 to 10 rpm. Note that the second drive shaft 34 is the 11th F! It passes through the central axis of the moving shaft 21,
Both shafts 34.21 are adapted to rotate independently of each other.

Next, a description will be given of FIG. 3, which is a schematic cross-sectional view when thermal energy from the upper planar heater 6 and the lower planar heater 8 is forced to convect within the heating chamber 1 by the Wi ring blower 9.

32a is a turntable with legs that is used by placing it on the turntable 32 in the case of two-stage cooking. In the case of sweet bread, pizza, etc., the process from kneading the dough to primary fermentation is performed in the bread container 11, and the dough is formed into pieces and placed on the turntable 32 and footed turntable 32a, and the process from secondary fermentation to baking is performed. After firing, the volume expands to about 2 to 3 times the initial volume. The internal volume of the bread container 11 is approximately 20 for one loaf of bread, and approximately 3Q for one loaf of bread, which is quite large. Therefore, with 11 bread containers, it is possible to prepare just the right amount of dough for two-stage cooking using the turntable 32 and the footed turntable 32a, from kneading to primary fermentation.

Extremely easy to use.

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 easy to use and easy to clean.

(a) To fix the bread container 11 to the bottom surface of the heating chamber 1, engage the fixing claw 13 provided on the lower outer surface of the support base 12 attached to the bread container 11 with the hook piece 14 fixed to the bottom surface of the heating chamber 1. Therefore, it is not necessary to make a hole for fixing the bread container in the bottom surface of the heating chamber 1.

(b) In order to facilitate the attachment and detachment of the bread container 11, the upper plane heater 6 is disposed above the upper surface of the heating chamber 1, and the lower heater 8
is arranged in the recess lb on the bottom of the heating chamber 1. This arrangement of the heater 6.8 increases the effective space within the heating chamber 1, particularly the height.

(c) If the dough for sweet bread, pizza, etc. is kneaded to the primary fermentation using the bread container 11, it is possible to handle just the right amount of dough for two-stage cooking, so a circulation system installed outside the side wall of the heating chamber 1 is used. Thermal energy from the upper plane heater 6 and the lower heater 8 is forced to convect by the blower 9 to enable two-stage cooking using the turntable 32 and the turntable with feet 32a.

The following (d) improves the quality of the finished product when the bread container 11 is used.

(d) In order to uniformly heat the upper and lower parts of the bread dough when the bread container 11 is used, the lower heater 8, which is mainly used when the bread container 11 is used, is disposed at a position lower than the bottom of the bread container 11 to generate thermal energy through natural convection and radiation. is uniformly transmitted to the bread container II.

In addition, since a home bakery that is integrated with a microwave oven generally has a larger heating chamber than a dedicated home bakery, there is more leeway in selecting the spatial distance between the bread container 11 and the lower heater 8. It is easy to reduce uneven heating.

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 meshing clutch section passes, and the vicinity of this hole 1a is formed into an upward convex shape to prevent food particles and liquid juice from flowing down.

In addition, when the present invention detects that a cooking container is fixed in the heating chamber, a control circuit centered on a microcomputer controls the sequence from kneading to baking bread, as well as sweet bread, pizza, mochi, and rice cooking. This is applied to high-frequency heating equipment that automatically performs sequences selected from a control panel.

Effects of the Invention According to the present invention, it is possible to provide a high-frequency heating device having multiple functions such as an automatic bread maker, an oven range, and a single-function microwave oven, which are easy to use, easy to clean, and have a good finish.

[Brief explanation of the drawings] Figure 1 is a cross-sectional view of the main parts of the high-frequency heating device of the present invention when it is used as an automatic bread maker, and Figure 2 is a cross-sectional view of the high-frequency heating device of the present invention when it is used as an oven range or a single-function microwave oven. Fig. 3 is a sectional view of the main part in the case of a microwave oven that performs two-stage cooking using hot air. 1... Heating chamber, lb... Recess, 2... High frequency oscillator. 6... Upper plane heater, 8... Lower plane heater, 9... Circulation blower, 11... Bread container, 12.
...Support stand, 13...Fixing claw, 14...Hook piece, 15...Bread ingredients.

Claims (3)

[Claims] (1) A heating chamber (1) using a high frequency oscillator (2), an upper plane heater, and lower heaters (6) and (8) as heating sources;
In order to force convection inside this heating chamber (1),
A circulating air blower (9) attached to the outside of the side wall of (1) to hold on the bottom of the bread container (11)
A fixing claw (13) provided on the outer surface of the lower part of the support base (12) fixed to the lower part of the heating chamber (1), and a hook piece (14) fixed to the bottom surface of the heating chamber (1) and engaging with the fixing claw (13). ) A high-frequency heating device characterized by comprising: (2) Connect the lower heater (8) to the recess (1) on the bottom of the heating chamber (1).
2. The high-frequency heating device according to claim 1, wherein the high-frequency heating device is disposed within the bread container (11) and is located below the bottom surface of the bread container (11). (3) The high-frequency heating device according to claim 1, wherein the upper plane heater (6) is disposed above the upper surface of the heating chamber (1).