JPH0225634A - High frequency heating device - Google Patents

Abstract

PURPOSE:To improve ease of use and a finish state by providing a first drive shaft to drive a kneading blade in a bread container through a through-hole in the bottom of a heating chamber and a cavity resonator for sealing radio waves mounted around the drive shaft. CONSTITUTION:A high frequency oscillator 2, an upper halogen lamp, and lower flat beaters 6 and 8 serve as a heating source, and upper halogen lamps 6 are situated in positions except a position right above the central part of the upper part of a bread container 11. Since heat energy is dispersed to the front and the rear from the central part of the upper part of the bread container, an excellent finish state having no unevenness in baking is produced. A first drive shaft 21 is engaged with a piece 20 to be moved through a through-hole 1a above which a heating chamber 1 is located, and the lower part of the first drive shaft is coupled to a large pulley 22 through a drive piece forming the one of engaging clutches. A belt 23 rotatably intercouples the large pulley 22 and a small pulley 24. A motor 25 for kneading coupled to the small pulley 24 rotates a blade 16 at a high speed. A cavity resonator 26 is adapted to confine high frequency energy, being about to leak to the outside of the heating chamber 1 along the drive shaft 21, and prevent leak of the energy to the outside.

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 is disclosed in Japanese Utility Model Publication No. 614238.
This is proposed in Publication No. 2. In the configuration of this proposal, the upper heater and lower heater are built into the heating chamber, and 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 at a predetermined angle. The fixing claw formed on the fixing piece catches on the back side of the bottom of the heating chamber, so that the kneader can be attached to the heating chamber. The claw contacts 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 second fermentation and kneading can be performed.

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

(,) A hole is provided at the bottom of the heating chamber to detect when the kneader is attached or removed. 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.

(1)) Both the upper and lower heaters are inside the heating chamber, so they get in the way when you take the kneading machine in and out.

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.

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 fixing claws provided on the outer surface of the lower part of a support base fixed to the lower part 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;
A first drive shaft drives the kneading blades in the bread container through a through hole in the bottom of the heating chamber, and a cavity resonator for radio wave sealing is provided around the drive shaft. A magnetically sensitive element that operates to detect attachment and detachment of the bread container is attached to the side wall of the cavity resonator.

Further, two upper halogen lamps are provided on the outside of the top surface of the heating chamber, and are placed on the front side and rear side of the top center of the bread container, respectively (Function) According to 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 piece fixed to the bottom of the heating chamber.
There is no need to make holes in the bottom of the heating chamber for fixing the bread container.

(1) 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 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 heating chamber.

(c) Using an upper halogen lamp and a lower flat heater installed on the outside of the top surface of the heating chamber, the heater does not protrude into the heating chamber.2 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.

The upper halogen lamp is placed so as not to be directly above the center of the top of the bread container, and the heat energy is dispersed back and forth relative to the medium heat at the top of the bread container, resulting in a good finish with little uneven baking.

(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 that is farther away from the bottom of the heating chamber and has a lower temperature during heating with the heater, and an element with a lower operating temperature rating can be used.

(f) Since the magnetic sensing element is attached to the side wall of the cavity resonator, the number of attachment parts can be reduced.

(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 bread maker (home bakery). With reference to this figure, the two devices will be divided into five components according to function and explained. 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 heater heating, the third is related to the bread container, the fourth is related to the rotation drive unit, and the sixth 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.

High frequency heating related components will be explained.

Reference numeral 1 denotes a heating chamber surrounded by a metal plate that opposes high frequency energy and is provided in a high frequency heating device.

At least the bottom surface of the heating chamber 1 is formed of a non-magnetic metal plate 1, for example 5US304. 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. 6 is a cooling blower for cooling the high frequency oscillator 2.

The heater heating related components will be explained.

e is an upper halogen lamp in which a tungsten wire is sealed in a quartz glass tube with an inert gas such as Alcon, a small amount of halogen group elements such as iodine and bromine, or compounds thereof, and is installed on the outside of the top surface of the heating chamber 1. be. This lamp 6 has two pieces.

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 SUS 3108 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 71 made of SUS 3098 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 bottom 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 parts of the presser fitting 10 itself are 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 wavelength is larger than 172, which is 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 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 Fig. 4 shows the cross-sectional shape of so-called mountain-shaped bread after baking.

16 is a kneading blade for kneading the bread raw material 16 and degassing it. 1A is a rotating shaft that detachably supports the kneading blade 16 and rotates it twice. 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.

Reference numeral 21 denotes a drive piece whose upper part engages 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. be. A belt 23 rotatably connects the large pulley 22 and the small pulley 24. 25 is kneading feather 1
In order to rotate the kneading blade 16, use a kneading motor connected to a small pulley 24 to rotate the kneading blade 16 at a high speed of, for example, about 20 rpm.

Reference numeral 26 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 bearing (enclosure) rotatably supports the first drive shaft 21 on the wall surface of the central hollow part of the resonator 26.
is embedded.

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 a bread baking sequence as an automatic bread maker, or a heating operation as an oven range or 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 is a rotary table that detachably supports the turntable 32 and rotates it five times. 34 is a second drive shaft that detachably supports and drives the rotary table 33. 36 is a table motor connected to the second drive shaft 34 via a plurality of gears (circuits) k, and rotates the turntable 32 at a low speed of, for example, 6 to 10 rpm. The second drive shaft 34 passes through the central axis of the first drive shaft 21, so that the two shafts 34.degree. 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 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 38 via the bottom surface of the heating chamber 1 . The magnetically sensitive element 38 is a Hall element whose resistance value changes depending on a magnetic field, a contact portion connected to one, for example, two ferromagnetic leads sealed in a glass tube together with an inert gas, an E-dosinochide, or the like. In this embodiment, a case is shown in which the element 38 is a reed switch. Reference numeral 3e denotes a mounting bracket made of a non-magnetic metal body and having a recess with a U-shaped cross section for accommodating a magnetically sensitive element 38 wrapped in an insulating material 4o. This metal fitting 39 has mounting screws 41.42
It is fixed to the side wall 28a inside the cavity resonator 26 by. Reference numeral 43 is a leader line that connects the element 38 to a 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 38 as viewed from the AB force direction in FIG. 1. When the magnetic sensing element 38 is a reed switch as in this embodiment, in order to maximize the sensitivity, the glass tube axis direction of the switch 38 and the permanent magnet 36 ONS pole arrangement direction are approximately parallel, and both are 38.36 are arranged so that both directions are substantially parallel to the bottom surface of the heating chamber 1.

Next, explanation will be given with reference to FIG. 3 which shows an enlarged perspective view of the insulating material 40.

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

40b and 40c are locations for storing the connecting portions between the ferromagnetic leads coming out from both ends of the glass tube and the lead wire 43.

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 pieces of the insulating material 40 are placed in pairs so as to surround the reed switch 38 and the connecting portion, and then 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, the protrusion 40f and the alignment hole 40g are unnecessary. If the material of the insulating material 4o is a silicone comb molded product, and the reed switch is stored for three days, 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 leader wire 43. improves.

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

Due to the following (a), (b), and (CL(')), 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 that 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 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 open it to the bottom.

(b) The attachment and detachment of the bread container 11 is detected by magnetic sensitivity that responds to the magnetic field transmitted through the bottom 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. Since this is done using the element 38, there is no need to make a detection hole in the bottom of the heating chamber 1.

(c) Easily attaching and detaching the bread container 11 and heating chamber 1
In order to increase the effective space inside, especially the height, heating chamber 1
An upper halogen lamp 6 is provided on the outside of 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.

((1) When bread is baked in the bread container 11, the center of the top of the bread approaches the top surface of the heating chamber 1 due to expansion.
In order to obtain a good finish with less uneven baking, the upper halogen lamp e is arranged so as not to be directly above the center of the top of the bread container 11, and the heat energy is dispersed back and forth with respect to the center of the top 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 following (e) and (f) make it possible to make the operating temperature conditions of the magnetically sensitive element 38 for detecting attachment and detachment of the bread container 11 advantageous, and to reduce the cost of the mounting member.

(c) In order to facilitate the adoption of the magnetic sensing element 38 which generally has a low operating temperature rating, a permanent foundation stone 36 is attached to the inner surface of the lower part of the support base 12 so that the hook piece 14 does not get in the way when the bread container 11 is fixed and rotated at a predetermined angle. Therefore, the magnet 36 can be brought closer to the bottom of the heating chamber 1, and the magnetically sensitive element 38 can be brought to a position where the temperature is lower when heating the heater, which is further away from the bottom of the heating chamber 1. .

(f) Reducing the number of mounting members for the magnetically sensitive element 38.
For filtering, the element 38 is attached to the side wall 26. of the cavity resonator 26. I
It is installed on.

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 base 12 and the bottom of the heating chamber 1 be as low as possible. Did you?)

If holes are made in this contact surface, a large amount of food particles and liquid juices will easily flow out, which is not desirable.

On the other hand, on the bottom of the heating chamber 1 there is a through hole 1a through which the meshing clutch part is passed.
Food scraps and juices flow down as an upward convex shapet,ll
.

I'm trying to stay quiet.

1. When the present invention detects that a cooking container has been hard boiled in the heating chamber, a control circuit centered on the microconi/beater controls the sequence of kneading and baking bread, as well as mochi and cooking rice. 6) Sequence control panel for pastries, pizza, etc. Applicable to Cstone high frequency heating equipment that can be selected and automatically operated.

(Effects of the Invention) According to the present invention, an automatic bread maker (home bakery), a microwave oven,
A high-frequency heating device having multiple functions such as a single-function microwave oven can be provided.

Furthermore, the operating temperature conditions of the magnetically sensitive element for detecting the bread container can be made favorable, and the cost of the mounting member for the element can be reduced.

[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. Figure 6 is a sectional view of the main parts when used as an oven or single-function microwave oven. 1... Heating chamber + 1a... Through hole 72... High frequency excavator. 6... Upper halogen lamp, 8... Lower flat heater 11... Bread container, 12... Support stand, 13... Fixing claw. 14... Hook piece, 16 - Bread ingredients, 16 - Carp, '] Vane, 21... First drive shaft, 26... Cavity resonator, 28a side wall, 36... Permanent magnet, 38... Magnetism Sensing element (dosuinochi).

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).
1) fixed to the bottom of the heating chamber (1),
A hook piece (14) that engages with the fixing claw (13) and a permanent magnet (
36), and a first kneading blade (16) in the bread container (11) that drives the kneading blade (16) through the through hole (1a) in the bottom of the heating chamber (1).
It is equipped with a drive shaft (21) and a cavity resonator (26) for radio wave sealing provided around the drive shaft (21), and is operated by the magnetic field from the permanent magnet (36) to open the bread container (11).
) is attached to the side wall (26a) of the cavity resonator (26). (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.