JPH01315983A - High frequency heating device - Google Patents

Abstract

PURPOSE:To make the device perform multifunction by providing upward cavities on the top of a heating chamber to put an upper crystallized glass tube heater in them and increase an effective space. CONSTITUTION:Upward cavities 1b and 1c are provided on the top of a heating chamber 1 to house an upper crystallized glass tube heater 6. The heating chamber 1 is equipped with a high frequency oscillator 2 and heaters 6 and 8 heating sources, and its base is bottomed with a non-magnetic metal plate. A bread container 11 is provided inside the heating chamber 1 to knead a raw material of bread 15 and bake it up. This container 11 is held at the bottom of the heating chamber 1 by engaging a fixing pawl 13 with a catching piece 14 which are provided at the outside of the lower part of a supporting mount 12. And a magnetic field from a permanent magnet fixed at the bottom inside the lower part of the heating chamber 1 transmits through the bottom to cause a magnetic sensitive element to work so that mounting and demounting of the container 11 can be detected. As the heater 6 is installed at the cavities 1b and 1c such that they do not project into the inside of the heating chamber 1, the effective space of the heating chamber 1 increases and a high frequency heating device having multifunction can be obtained.

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 and lower heater are built into 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.
The kneader can be attached to the heating chamber. The nail above! 5; Make contact with the actuator of the microswitch installed on the back side of the bottom of the heating chamber, and when the microswitch is turned on, it will start fermenting, kneading, etc.
P Kens can now be performed.

Problems that the invention aims to solve According to the above configuration.

(a) A hole is provided at the bottom of the heating chamber to detect when the kneader is attached or detached. This hole is also used to fix the kneading metal to the bottom of the heating chamber. During this fixation.

Since it is necessary to insert the fixing piece into the hole and rotate it by a predetermined angle, the hole has to be large. Therefore, there is a strong possibility that a large amount of food particles, liquid liquid, etc. may flow down from this hole to the outside.

(b) Since the upper heater and lower heater are both located inside the heating chamber, they get in the way when putting in and taking out the kneading machine.

Moreover, the effective space in the heating chamber, especially the height, becomes smaller.

There were problems like.

The purpose of the present invention is to solve the above problems and improve usability.

Our goal is to provide all high-frequency heating devices with agitation functions that are easy to clean and provide a good finish.

□Means for solving the problems The high-frequency heating device of the present invention has a high-frequency oscillator, an upper crystallized glass tube heater, a lower flat heater, and a total heating source,
A heating chamber whose bottom surface is at least made of a non-magnetic metal plate, a bread container in which bread ingredients are kneaded and baked inside the heating chamber, and a bread container fixed to the bottom of the bread container to hold the bread container on the bottom surface of the heating chamber. A fixing claw provided on the outer surface of the lower part of the support base, a hook piece that rotates on the bottom of the heating chamber and engages with the fixing claw, a permanent magnet attached to the inner surface of the lower part of the support base, and a permanent magnet attached to the inner surface of the lower part of the support base. It is equipped with a magnetically sensitive element that is activated by the magnetic field from the magnet and detects whether the bread container is attached or removed.

Further, two upper crystallized glass tube heaters are installed in upward recesses provided on the upper surface of the heating chamber located directly above the center of the upper part of the bread container on the front side and the rear side, respectively.

For production 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 and the P hook piece fixed to the bottom surface of the heating chamber. There is no need to drill holes in the bottom of the heating chamber.

(b) The attachment and detachment of the bread container is detected by a magnetically sensitive element that responds to the magnetic field transmitted through the bottom surface of the heating chamber from a permanent magnet attached to the inner surface of the lower part of the support base of the bread container fixed in the heating chamber. There is no need to provide a detection hole in the bottom of the chamber.

(C) Stored in the upward recess provided on the top of the heating chamber,
The upper crystallized glass tube heater and the lower flat heater are used to prevent the heater from protruding into the heating chamber and to prevent the heater from getting in the way when all the bread containers are attached and removed. This makes it possible to increase the amount of light.

(d) When bread is baked in a bread container, the center of the top of the bread approaches the top surface of the heating chamber due to expansion.

All the upper crystallized glass tube heaters are arranged so as to avoid directly above the center of the top of the bread container, and the heat energy is distributed back and forth to the center of the top of the bread container, resulting in a good finish with a little uneven baking. is obtained.

(e) Since the permanent magnet is attached to the inner surface of the lower part of the support base so that the hook piece does not get in the way when the bread container is rotated by a predetermined angle when fixing the bread container, the position of the permanent magnet is close to the bottom of the heating chamber. It is possible to install. Therefore, the magnetically sensitive element can be brought to a position where the temperature during heating by the heater is lower, which is further away from the bottom of the heating chamber, and an element with a lower operating temperature rating can be used.

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

First, a description will be given of FIG. 4, which is a schematic cross-sectional view when the high-frequency heating device of the present invention is used as an automatic baker (home bakery).

With reference to this figure, one device will be divided into five components according to function and explained. That is, the first component is related to high frequency heating, the second is related to heater heating,
The fourth is related to the bread container, the fourth is related to the rotary drive unit, and the fifth is related to the outer shell. However, the number of members 2 and auxiliary electrical parts for each 7P element shall be kept to the minimum necessary.

Each component will be explained below.

High frequency 711] All heat-related components 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. At least the bottom of this heating chamber 1 is a non-magnetic metal plate.

For example, it is made of SUS 304. Reference numeral 2 designates a high frequency oscillator 9, such as a magnetron, which supplies all of the high frequency energy into the heating chamber 1 through a waveguide filter. Reference numeral 4 denotes a coupling port between the waveguide 6 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 heater heating related components will be explained.

Reference numeral 6 denotes an upper crystallized glass tube heater in which a coiled heating wire is inserted into a crystallized glass tube, which is a type of ceramic that has excellent corrosion resistance against salt and oil contained in foods that are scattered during cooking. The upper crystallized glass tube heater 6 is divided into two pieces, each having an upward recess 1b provided on the upper surface of the heating chamber 1 located on the front side and the rear side of the upper center of the bread container 11, respectively.

It is housed in the heating chamber 1c and arranged so as not to protrude below the upper surface of the heating chamber 1. 7a and 7b are respectively dents I
b, Trapezoidal wall surface for forming 1 cf.

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 planar heater 8. 10 is a lower plane heater 8. Insulation material 9'f! : A presser metal fitting to hold it on the outside of the bottom of the heating chamber. However, the mounting member of the presser fitting 10 itself is omitted.

Bread container related components will be explained.

11id is a bread container in which at least one side of the inlet is made of a metal molded product such as aluminum whose wavelength is larger than 1/2 of the wavelength 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 15 provided on the outer surface of the lower part of the support base 12 is connected to the hook P piece fixed to the bottom surface of the heating chamber 1. 14. 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 used to knead the bread ingredients 15 and use a degassing tray. 17
Supports 16 blades that can be attached and detached.

This is the axis of rotation. 18 is an oil seal made of silicone rubber or the like. 19 is the rotation axis 17? : A bearing that supports rotation and rotation. Reference numeral 20 is a driven piece whose upper part is rotatably attached to the rotating shaft 17 and whose lower part meshes to form one side of the clutch.

The rotation drive unit related components will be explained.

Reference numeral 21 denotes a drive piece whose upper part is fitted with the driven piece 20 through the through hole 1ai of the heating chamber 10 to form one side of a dog clutch, and whose lower part is a first drive shaft connected to the large pulley 22. A belt 23 rotatably connects the large pulley 22 and the small boob IJ-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 0D'rpm. 26 is the drive shaft 21
This is a cavity resonator that captures high-rise 0P wave energy that attempts to leak to the outside of the heating chamber 1 along the path and prevents it from being released. The wall of the central hollow part of this resonator 2B has a first
A bearing (circuit) that rotatably supports the drive shaft 21 is fitted.

The outline related components 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 the bread baking sequence as an automatic bread maker, or the heating operation as an open 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, a schematic diagram 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. 4 and used as an oven range or a single-function microwave oven. FIG. 5, which shows a cross-sectional view, will be explained.

The filter 2 places the object to be heated 31 and moves it 9 times.
P - table. 6 is a rotary table which detachably supports a turntable 62 and rotates it once. 34 is the turntable 6
3 is a second drive shaft that detachably supports and drives the shaft. 35
is a table motor that is connected to the second 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 roller 4 passes through the center axis of the first drive shaft 21 and
=-S1 Both shafts 34, 21 are adapted to rotate independently of each other.

Next, a detection means for detecting whether the bread container 11 is attached or detached.

FIG. 1 showing an enlarged sectional view of the main part of the mounting structure will be explained.

36 is a column 12a extending downward from the upper surface of the support base 12
This is a permanent magnet attached to the inner surface of the lower part of the support base 12 with a stop pin 37. This permanent magnet 36 faces the magnetically sensitive element 68 via the bottom surface of the heating chamber 1 .

The magnetically sensitive element 38 is a reed switch whose contact part is connected to, for example, two ferromagnetic leads and is sealed in a glass tube together with an inert gas, or a Hall element whose resistance value changes depending on the magnetic field. In this embodiment, a case is shown in which the element filter 8 is a reed switch. Reference numeral 69 denotes a mounting bracket made of a non-magnetic metal body and having a recess with a U-shaped cross section for accommodating the magnetically sensitive element 38 wrapped in the insulating material 40. This metal fitting 39 is fixed to the side wall 26a inside the cavity resonator 26 by mounting screws 41, 42. Reference numeral 43 denotes a leader line that connects the element 68 to the control circuit (circuit).

Next, a description will be given of FIG. 2, which is a cross-sectional view of the vicinity of the storage portion of the magnetically sensitive element 68 as viewed from the AB force direction in FIG. 1.

When the magnetically sensitive element 38 is a reed switch as in this embodiment, the switch 68 is used to maximize the sensitivity.
The axial direction of the glass tube and the NS pole arrangement direction of the permanent magnet 36 are approximately parallel to each other, and both directions 38 and 36 are aligned with the heating chamber 1.
Place it so that it is almost parallel to the bottom surface of the

Next, FIG. 3 showing an enlarged perspective view of the insulating material 40 will be described.

40a is a tube storage recess into which a glass tube is fitted.

40b, 4. Oc is the place where the connection part between the ferromagnetic 3P body leads coming out from both ends of the glass tube and the lead wire 43 is stored.

This is a connection portion storage recess that is shallower than the recess 40a.

40d and 40e are outlet ports for the leader line 46. 40
f is formed with the same mold, and the two are put together to form the reed switch 3.
When storing 8, insert it into the other matching hole 40g,
). That is, 40 pieces of insulating material are housed in pairs so as to surround the reed switch 6B and the connecting portion, and inserted into the recess of the mounting bracket 39. Alternatively, two insulating materials 40 are used as a pair at the outlet 40d.

It may be integrally molded so that it can be opened and closed back to back on the side opposite to 40e. In this case, 1 protrusion 40f5 alignment hole 40g is unnecessary. The insulating material 4o is made of silicone rubber molded material, and after the reed switch 68 is housed, the outer surface is coated with silicone adhesive to prevent moisture from coming into contact with the ferromagnetic lead and the conductor part of the lead wire 46 to improve durability. do.

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

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

(Al) To fix the bread container 11 to the bottom of the heating chamber 1.

4F A hook piece 14 that fixes the fixing claw 13 provided on the lower outer surface of the support stand 12 attached to the bread container 11 to the bottom surface of the heating chamber 1
The hole for fixing the bread container should be in the heating chamber 1.
There is no need to make a hole at the bottom.

(b) The attachment and detachment of the bread container 11 is detected by a magnetic sensing element that responds to the magnetic field transmitted through the bottom surface of the heating chamber 1 from the permanent magnet 36 attached to the inner surface of the lower part of the support base 12 of the bread container 11 fixed in the heating chamber 1. 38, there is no need to make a detection hole in the bottom of the heating chamber 1.

(c) To facilitate the attachment and detachment of the bread container 11 and to increase the effective space, especially the height, in the heating chamber 1.

A crystallized glass tube heater 6 is provided in the upward recesses 1b and 1c on the top surface of the heating chamber 1, and a lower flat heater 8 is provided on the outside of the bottom surface of the heating chamber 1, so that the heater does not protrude into the heating chamber 1. .

(d) When bread is baked in the bread container 11, the top center of the bread approaches the top surface of the heating chamber 1 due to expansion. An upper crystallized glass tube heater 6 is placed at 15P so as to avoid the upper part of the bread container 11, and heat energy is dispersed back and forth with respect to the center of the upper part of the bread container 11.

Furthermore, according to (e) below, the operating temperature conditions of the magnetically sensitive element 3B which detects all attachment and detachment of the bread container 11 are made favorable.

(e) Magnetic sensing element 38 that generally has a low operating temperature rating
In order to make it easier to adopt the support stand 12, the hook piece 14 does not get in the way when the bread container 11 is fixed and rotated by a predetermined angle.
A permanent magnet 36 is attached to the inner surface of the lower part, so that the bottom surface of the heating chamber 1 can be approached to the magnet 36, and the magnetic sensing element 3 can be moved closer to the bottom surface of the heating chamber 1.
8. The heater can be brought to a location where the temperature is low during heating, away from the bottom of the heating chamber 1.

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 a hole is made in this contact surface, a large amount of food particles and liquid juice will easily fall off, which is not suitable.

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 entire vicinity of this hole 1a is shaped upwardly to prevent food particles and liquid juice from flowing down.

22 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 a single loaf of bread, as well as rice cake, rice cooking, sweet bread, and pizza. This sequence is applied to high frequency/10-thermal equipment that is designed to be automatically selected by the entire control panel.

Effects of the Invention According to the present invention, an automatic bread maker (home bakery), microwave oven,
We can provide all high-frequency heating devices with multi-functions, such as single-function microwave ovens.

Furthermore, the operating temperature conditions for the magnetically sensitive element that detects the bread container are favorable.

[Brief explanation of the drawing]

Fig. 1 is an enlarged cross-sectional view of the essential parts showing the detection means of the bread container and its mounting structure, and Fig. 2 shows the storage state of the magnetically sensitive element (reed switch) as seen from the direction of the AB arrow 7P in Fig. 1. 3 is an enlarged perspective view showing the shape of the insulating material surrounding the magnetically sensitive element, and FIG. 4 shows the main points of the high-frequency heating device-1 of the present invention when used as an automatic bread maker. In section. FIG. 5 is a sectional view of main parts when used as a microwave oven or a single-function microwave oven. 1... Heating chamber + 1b, Ic... Recess 2.
...High frequency oscillator, 6...Upper crystallized glass tube heater. 8...Lower plane heater, 11...Bread container. 12... Support stand, 16... Fixing claw. 14...Hook piece, 15...Bread ingredients.

Claims (2)

[Claims] (1) A high frequency oscillator (2), an upper crystallized glass tube heater, and a lower flat heater (6), (8) are used as heating sources,
Heating chamber (1) with at least the bottom made of a non-magnetic metal plate
, a bread container (11) in which bread ingredients (15) are kneaded and baked in the heating chamber (1), and a bread container (11) to hold the bread container (11) on the bottom surface of the heating chamber (1). A fixing claw (13) provided on the outer surface of the lower part of the support base (12) fixed to the lower part of (11), and this fixing claw (13)
The hook piece (
14), a permanent magnet (36) attached to the inner surface of the lower part of the support base (12), and a magnetic field from the permanent magnet (36) that passes through the bottom surface of the heating chamber (1). 11) A high-frequency heating device characterized by comprising a magnetically sensitive element (38) for detecting attachment/detachment of the device. (2) Two upper crystallized glass tube heaters (6),
An upward recess (1b) provided on the top surface of the heating chamber (1), respectively.
), (1c). (3) The high-frequency heating device according to claim (2), wherein the recesses (1b) and (1c) are respectively located on the front side and the rear side of the upper center of the bread container (11).