JPH0225633A - High-frequency heater - Google Patents

Abstract

PURPOSE:To improve easiness of use and cleaning, and goodness of finish by providing a claw of fixing that is arranged on the lower, outer surface of a support base, hanging piece fixed to the bottom face of a heating chamber, and a magnetic induction element which acts by the magnetic field given by a permanent magnet and detects whether or not a bread vessel is attached. CONSTITUTION:In order to fix a bread vessel 11 to the bottom face of a heating chamber 1 a claw 13 of fixing that is provided on the lower, outer face of a support base 12 should be engaged to a hanging piece 14 fixed to the bottom face of the heating chamber 1. The detection of whether or not the bread vessel 11 is attached is made by a magnetic induction element 38 which responds to the magnetic field which penetrates the bottom face of the heating chamber 1. In order to make easy the mounting and dismounting of the bread vessel 11 and larger the effective space in the heating chamber 11 an upper halogen lamp 6 is provided on the upper, outer side of the heating chamber 1 and a lower flat heater 8 is provided on the outer side of the bottom face of the heating chamber 1. In order to make it easy to adopt magnetic induction element 38 of a low rated working temperature a permanent magnet 35 is attached to the lower, inner face of the support base 12 and provided at a place where the temperature is low during heating by a heater.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a high-frequency heating device having a food stirring function.

(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. The above-mentioned mold comes into contact with the actuator of a microswitch provided on the back side of the bottom of the heating chamber, and when the microswitch is turned on, bread-specific sequences such as fermentation and kneading can be performed.

(Problem to be solved by the invention) According to the above configuration.

(a) A hole is provided at the bottom of the heating chamber to detect whether the kneader is attached or detached. This hole is also used to secure the kneader 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 juice, etc. may flow out from this hole, causing an inconvenience.

0)) The soil 1 kneader and the lower heater are both located in the heating chamber, so they get in the way when the kneader comes out.

In addition, the effective space within the heating chamber, particularly the height, is reduced. 3 There were some problems.

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

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

(Means for Solving the Problems) The high-frequency heating device of the present invention includes a heating chamber that uses a high-frequency oscillator, an upper halogen lamp, and a lower flat heater as a heating source, and has at least a bottom surface made of a non-magnetic metal plate, and a heating chamber for heating the heating chamber. A bread container that performs everything from kneading bread ingredients to baking indoors, and a fixing claw provided on the outer surface of the lower part of a support base fixed to the bottom of the bread container to hold the bread container on the bottom surface of the heating chamber.

a hook piece that is fixed to the bottom surface of the heating chamber and that engages with the fixing claw; and a permanent magnet that is attached to the inner surface of the lower part of the support base.
It may be equipped with a magnetically sensitive element that is activated by the magnetic field from the permanent magnet that passes through the bottom surface of the heating chamber and detects attachment and detachment of the bread container.

Furthermore, two upper halogen lamps are provided on the outside of the heating chamber J-=1ffi, and are placed on the front side and the rear side of the ten-center center I- of the bread container, 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 inner surface of the lower part of the support base fixed to the container with the hook fixed to the bottom of the heating chamber.
There is no need to make a hole in the bottom of the heating chamber for fixing the bread container.

(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 on the bottom of the chamber.

(c) An upper halogen lamp and a lower flat heater installed on the outside of the top of the heating chamber are used to prevent the heater from protruding into the heating chamber, so that the heater does not get in the way when the bread container is attached or removed, and the heating This allows for a large amount of effective indoor space, especially height.

(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.

Since the upper halogen lamp is arranged so as to avoid directly above the center of the top of the bread container, and the heat energy is dispersed back and forth relative to the center of the top of the bread container, a good finish with less uneven baking can be obtained.

(e) The permanent magnet is attached to the lower inner surface of the support base so that the hook piece does not get in the way when the bread container is rotated at a predetermined angle when fixing the bread container, so the permanent magnet should be installed close to the bottom of the heating chamber. becomes possible. 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, the high-frequency heating device of the present invention can be used in an automatic bread maker (home bakery).
) FIG. 4, which shows a schematic cross-sectional view when used as a device, will be explained.

With reference to this figure, the two devices will be divided into five components according to function and explained. That is, as for these components, the first is related to high frequency heating, the second is related to heater heating, the third is related to bread container, the fourth is related to rotation drive unit, and the fifth is related to 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.

High frequency heating 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 heated device. At least the bottom surface of the heating chamber 1 is formed of a non-magnetic metal plate 2, for example 808304. Reference numeral 2 designates a high frequency oscillator 2, 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 heater heating related components will be explained. 6 is an upper halogen lamp in which a halogen lamp in which a tungsten wire is sealed with an inert gas such as Alcon, a trace amount of a halogen group element such as iodine and bromine, or a compound thereof in a quartz glass tube is installed on the outside of the upper surface of the heating chamber 1; It is. This lamp 6 is 2
They are located on the front side and the rear side of the upper center of the bread container 11, respectively. The upper halogen lamp 6 is made of heat-resistant stainless steel 5US310S, 5U that covers the box-shaped heat insulating wall 7a and the infrared radiation opening 1b on the top surface of the heating chamber 1.
It is surrounded by a perforated plate 7b made of S309S or the like.

An infrared transparent glass ceramic 7c with low high frequency loss is provided at the bottom of the perforated plate 7b. 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. 1o is the lower plane heater 8. This is a presser metal fitting for holding the heat insulating material 9 on the outside of the bottom surface of the heating chamber. However, the mounting member of the presser fitting 10 itself is omitted.

Bread container related components 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 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. 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. 15 is a kneading blade for kneading the bread raw material 15 and degassing it. 17 supports the kneading blade 15 in a detachable manner.

This is the axis of rotation. 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.

The rotation drive unit related components will be explained. 21 is.

The upper part is a drive piece that fits with the driven piece 20 through the through hole 1a of the heating chamber 1 to form one side of a dog clutch, and the 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 boob IJ-24.

26 is a small pulley 24 for rotating the kneading blade 15.
For example, the kneading blades 15 are moved by a kneading motor connected to
Rotate at a high speed of about 0 rpm. Reference numeral 2e denotes a cavity resonator that takes in high frequency energy that would otherwise leak out of the heating chamber 1 along the drive shaft 21 and prevents it from being released. A first drive shaft 2 is provided on the wall surface of the central hollow part of the resonator 26.
1 is fitted with a bearing (circuit) that supports it rotatably.

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. 29
is a bread baking sequence as an automatic bread maker, or an oven range.

This is a control panel for selecting heating operations as a single-function microwave oven. 3o is a leg that separates the entire device from the installation surface and prevents damage to the installation surface.

Next, a schematic cross-section of the case where components related to the rotational movement of the object to be heated 310 are set in the heating chamber 1 instead of the components related to the bread container shown in FIG. 4 and used as an open range or a single-function microwave oven. FIG. 6, which shows the diagram, will be explained. 32 is a turntable on which the object to be heated 31 is placed and moved one rotation. 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.

36 is coupled to the second drive shaft 34 via a plurality of gears (circuits), and the turntable 32 is rotated, for example, from 6 to 10 rpm.
This is a table motor that rotates at a low speed of m. Note that the second drive shaft 34 passes through the central axis of the first drive shaft 21, so that the two shafts 34 and 21 rotate independently of each other.

Next, a description will be given of FIG. 1, which shows a detection means for detecting attachment and detachment of the bread container 11 and an enlarged cross-sectional view of a main part of its mounting structure. 3e is a column 1 extending downward from the top 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 using a fixing pin 2a and a fixing pin 3.

This permanent magnet 36 faces the magnetically sensitive element 38 via the bottom surface of the heating chamber 1 . The magnetically sensitive element 38 is.

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

Next, FIG. 2, which shows a cross-sectional view of the vicinity of the housing portion of the magnetically sensitive element 38 as viewed from the direction AI3 in FIG. 1, will be described. When the magnetic sensing element 38 is a reed switch as in this embodiment, the switch 38 is
The glass tube axis direction of the permanent magnet 3e and the NS pole arrangement direction of the permanent magnet 3e are made almost parallel, and the directions of both 38 and 36 are both parallel to 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 and 40c are the places where the connection parts between the ferromagnetic leads coming out from both ends of the glass tube and the lead wire 43 are housed;
This is a connection portion storage recess that is shallower than the recess 40a. 40d
, 40e is an outlet for the leader line 43. 40f is a protrusion formed of the same mold and inserted into the other matching hole 40g when the reed switch 38 is housed together. That is, two insulating materials 40 are housed in pairs so as to surround the reed switch 38 and the connecting portion, and inserted into the recess of the mounting bracket 39. Alternatively, the insulating material 4Q may be integrally molded in such a manner that a pair of insulating materials 4Q are placed back to back on the side opposite to the outlet ports 40d and 40e and can be opened and closed. In this case, the protrusion 40f and the alignment hole 40g are unnecessary.

The insulating material 40 is made of a silicone rubber molded product, and after the reed switch 38 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 43 to improve durability. do.

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

Due to the following fans, (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.

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

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

fc) In order 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, an upper halogen lamp 6 is installed on the outside of the top surface of the heating chamber 1, and a lower flat heater is installed on the outside of the bottom surface of the heating chamber 1. 8 is provided to prevent the heater from protruding 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. The upper halogen lamp 6 is arranged so as to avoid this, and heat energy is dispersed back and forth with respect to the center of the upper part of the bread container 11. The upper halogen lamp brightens the inside of the heating chamber 1 to make it easier to see the degree of baking.

Furthermore, the operating temperature conditions of the magnetically sensitive element 38 for detecting attachment and detachment of the bread container 11 are made advantageous due to the following (e).

(c) Magnetic sensing element 38 that generally has a low operating temperature rating
In order to make it easier to adopt the support base 12, the hook piece 14 does not get in the way when the bread container 11 is fixed and rotated at a predetermined angle.
A permanent magnet 36 is attached to the inner surface of the lower part, so that the magnet 3e can be brought closer to the bottom surface of the heating chamber 1, and the magnetically sensitive element 3 can be moved closer to the bottom surface of the heating chamber 1.
8 can be brought to a position away from the bottom of the heating chamber 1 where the temperature is low during heater 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 scraps and liquid juice will easily flow down, which is not preferable.

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 shaped upwardly 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, the microcomputer-based control circuit controls the sequence from kneading to baking a single loaf of bread, as well as mochi and cooking rice.

It is applied to high-frequency heating equipment that automatically selects the sequence for sweet bread, pizza, etc. from a control panel.

(Effects of the Invention) According to the present invention, an automatic bread maker (home bakery) that is easy to use, easy to clean, and has a good finish, an open range,
A high-frequency heating device having multiple functions such as a single-function microwave oven can be provided.

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 is a cross-sectional view showing the storage state of the magnetically sensitive element (reed switch) viewed from the direction of arrow AB in Fig. 1. Fig. 3 is an enlarged perspective view showing the shape of the insulating material surrounding the magnetically sensitive element, and Fig. 4 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. in. FIG. 6 is a sectional view of essential parts when used as an open range or a single-function microwave oven. 1...Heating chamber, 2...High frequency oscillator, 6...Upper halogen lamp, 8...Lower plane heater, 11...
Bread container, 12... Support stand, 13... Fixing claw, 1
4... Hook piece, 15... Bread ingredients, 36... Permanent magnet, 38... Magnetic sensing element (reed switch).

Claims (2)

[Claims] (1) A heating chamber (1) whose heating sources include a high-frequency oscillator (2), an upper halogen lamp, and lower flat heaters (6) and (8), and whose bottom surface is made of a non-magnetic metal plate; (1) A bread container (11) in which bread ingredients (15) are kneaded to baked;
) to the bottom of the heating chamber (1).
A fixing claw (13) provided on the lower outer surface of the support base (12) fixed to the lower part of the heating chamber (1), and a puller engaged with the fixing claw (13) and fixed to the bottom surface of the heating chamber (1). The hanging piece (14) and the permanent magnet (
36) and the bread container (11) operated by the magnetic field from the permanent magnet (36) that passes through the bottom of the heating chamber (1).
) A high-frequency heating device characterized by comprising a magnetically sensitive element (38) for detecting attachment and detachment of the device. (2) The high frequency lamp according to claim 1, wherein two upper halogen lamps (6) are provided on the outer side of the upper surface of the heating chamber (1), and are located on the front side and rear side of the upper center of the bread container (11), respectively. heating device.