JPH0225630A - High-frequency heater - Google Patents

Abstract

PURPOSE:To make favorable the conditions on operating temperature of a magnetic induction element and attempt to reduce the cost of a mounting member by mounting to the side wall of a hollow resonator the magnetic induction element which acts by the magnetic field of a permanent magnet and detects whether or not a bread vessel is attached. CONSTITUTION:In order to make it easy to adopt a magnetic induction element 38 of a low rated temperature of use a permanent magnet 36 is installed on the lower, inner face of a support base 12 where a hanging piece 14 is not in the way when it rotates a specified angle during a bread vessel 11 is fixed, and the magnet 36 is made able to come near the bottom face of a heating chamber 1, and by the nearness to the heating chamber 1 the magnetic induction element 38 is installed at a position away from the bottom face of the heating chamber 1 where the temperature is low while heating by the heater. And, in order to reduce the number of members for installing the magnetic induction element 38 the element 38 is mounted on the side wall 26a of a hollow resonator 26. Further, in order to lower the rise of temperature of the magnetic induction 38 at the lower section of the bottom face of a heating chamber 1 while heating by the heater an upper halogen lamp 44 is provided on the upper., outer side of the heating chamber 1 and a heater 6 for hot air is installed on the rear, outer side of the heating chamber 1.

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 the configuration of this proposal, the upper heater P 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 3-burner heat chamber. The above-mentioned claw is located on the back side of the bottom of the heating chamber.
When it comes into contact with Sochi's actuator and turns on the microswitch, it can perform bread-specific sequences such as fermentation and kneading.

The problem 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 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.

Q)) Both the upper and lower heaters are inside the heating chamber, so they get in the way when I take them in and out of 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.

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 uses a high-frequency oscillator, an upper halogen lamp, and a hot air heater as heating sources, and includes a heating chamber having at least a bottom surface made of a non-magnetic metal plate, and A bread container for kneading bread ingredients to baking, a fixing claw that is fixed to the bottom of the bread container and provided on the outer surface of the lower part of the support base, and a fixing claw that holds the bread container on the bottom surface of the heating chamber. a hook piece fixed to the bottom surface of the bread container and engaged with the fixing claw; a permanent magnet attached to the inner surface of the lower part of the support base; 1 drive shaft and an air f1.1 resonator for radio wave sealing provided around the drive shaft, and a magnetic sensing element that operates by the magnetic field from the permanent magnet to detect attachment and detachment of the bread container is installed in the air. Mounting on the side wall of the Mi'il resonator is convenient.

In addition, an upper halogen lamp is installed on the outside of the top of the heating chamber.
They are placed on the front side and on the φ side of the top center of the bread container, respectively.

action With the above configuration.

(a) The bread container can be fixed in the heating chamber by engaging the hook fixing claw fixed to the bottom of the heating chamber, which is installed on the outer surface of the lower part of the support base fixed to the container.
There is no need to make holes in the bottom of the heating chamber for fixing the bread container.

('b) Detection of attachment and detachment of the bread container is performed 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 heating chamber.

(c) By using an upper halogen lamp and a hot air heater installed on the outside of the top of the heating chamber, the heater does not get in the way when the bread container is attached or removed, and the effective space in the heating chamber, especially the height, can be increased. I have to.

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

The upper halogen lamp is placed so as to avoid directly above the center of the top of the bread container, and the heat energy is dispersed back and forth to the center of the top of the bread container, resulting in a good finish with little uneven baking. It will be done.

(e) When baking sweet bread, pizza, etc. from mixing to primary fermentation in a bread container, molding it into 9 parts and baking it with a hot air heater, the bread container can be used in two stages, which is unique to hot air ovens, using the ingredients for one cup. A hot-air microwave oven with a built-in bread container is extremely easy to use, as it allows you to prepare just the right amount for cooking.

('') 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 at a predetermined angle to fix the bread container, so the permanent magnet can be installed close to the bottom of the heating chamber. Therefore, the magnetically sensitive element can be brought to a position far from the bottom of the heating chamber where the temperature is lower during heating with the heater, and an element with a lower operating temperature rating can be used.

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

- Since there is no heater near the bottom of the heating chamber, it is possible to suppress the temperature rise near the magnetic sensing element when heating the heater.

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

First, 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), will be described.

With reference to this diagram, one device 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 members p for attaching each element and auxiliary electrical parts are kept to the minimum necessary. Below, each component will be explained separately.

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 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. 2 is the waveguide 5
A high frequency oscillator 1, for example a magnetron, supplies high frequency energy into the heating chamber 1 via a high frequency oscillator 1, such as a magnetron. Reference numeral 4 denotes a coupling port between the waveguide 5 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 a specific hot air heater attached to the outside of the rear surface of the heating chamber. Reference numeral 7a denotes a first circulation fan that sucks air in the heating chamber 1 through the suction port 1b, heats it with the hot air heater 6, and blows it into the heating chamber 1 again through the blowout port 1c. 8a is a first hot air generation chamber that houses the hot air heater 6 and the first circulation fan 7a. 7b is a second circulation fan that sends thermal energy emitted from the wall surface of the first hot air generation chamber 8a heated by the hot air heater 6 into the heating chamber 1. 8b is the first
This is a second hot air generation chamber that houses the hot air generation chamber 8a and the second circulation fan 7b. 9 is a twelfth and second circulation fan 7a;
This is a fan motor that rotates 7b. The twelfth and second circulation fans 7as7b are rotatably supported by the fan motor 9 by a nut F 10a + a positioning spacer fob and a retaining ring 10c.

The heater heating related components will be explained.

6 is a halogen lamp in which a tungsten wire is sealed in a quartz glass tube with an inert gas such as argon, a small amount of halogen group elements such as iodine and bromine, or their compounds, and is installed on the outside of the upper surface of the heating chamber. It is. 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 1), respectively. The upper halogen lamp 6 is made of heat-resistant stainless steel SUS 5105, 5US309 that covers the box-shaped heat insulating wall 7a and the infrared radiation opening 1b on the top surface of the heating chamber 1.
A perforated board consisting of 5 etc.? It is surrounded by b.

At the bottom of the perforated plate 7b, an infrared transparent crystallized glass (trade name: NEOLEX) 7c with low high frequency loss is provided.

Bread container related components will be explained.

Reference numeral 11 denotes a bread container made of a metal molded product such as aluminum or a dielectric molded product such as Pyrex that transmits high frequency waves, and at least one side of the inlet is larger than 1/2 of the wavelength used for high frequency energy. 12 is a support stand fixed to the lower part of this container 1). To fix the bread container 11 in a predetermined position, rotate the bread container 11 by a predetermined angle, and engage the fixing claw 13 provided on the outer surface of the lower part of the support base 12 with the hook piece 14 fixed to the bottom surface of the heating chamber. 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 ingredients 15 and removing gas. 17 supports the kneading blade 16 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 denotes a driven piece whose upper part is fixed to the rotating shaft 17 and whose lower part is engaged and forms 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 1a of the heating chamber 10 to form one side of the 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 pulley I7-24.

25 is a small pulley 24 for rotating the kneading blade 16.
For example, connect the kneading blades 16 to 2 with a friend kneading motor.
Rotate at a high speed of about 0 rpm. Reference numeral 26 denotes a cavity resonator that takes in high frequency energy that is about to leak to the outside of the heating chamber along the drive shaft 2) 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, which minimizes the release of high frequency energy and heater heat energy to the outside during heating. 29 is a round 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 60 designates feet that keep the entire device away from the installation surface and do not damage the installation surface.

Next, instead of the bread container related components shown in Fig. 4, components related to the rotational movement of six wave force a hot objects are set in the heating chamber 1, and used as a microwave oven or a single-function microwave oven. FIG. 5, which is a schematic cross-sectional view of the case where the device is installed, will be explained.

32 is a turntable on which the object to be heated 31 is placed and moved one rotation. Reference numeral 56 denotes a rotary table that detachably supports the turntable 52 and rotates it once. 54 is a second drive 'IIJ that detachably supports and drives the rotary table 55. 3
5 is coupled to the second drive shaft 34 via a plurality of gears (circuits), and the turntable 32 is rotated at a speed of, for example, 5 to 10 rpm.
This is a table motor that allows you to enjoy low-speed rotation. Na 3
．． The second drive shaft 34 passes through the central axis of the first drive shaft 2), so that the two shafts 34 and 21 rotate independently of each other.

Next, a detection means for detecting attachment and detachment of the bread container 1).

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

66 extends downward from the upper surface of the support base 12 and extends from the T support 12a.
This is a permanent magnet attached to the inner surface of the lower part of the support base 12 with a stop pin 57. This permanent magnet 56 faces the magnetically sensitive element 3 through the bottom of the JJO heat chamber.

The magnetically sensitive element 58 is a reed switch in which a contact portion connected to, for example, two ferromagnetic leads is sealed in a glass tube together with an inert gas, or a Hall element whose resistance value changes depending on a magnetic field. In this embodiment, a case is shown in which the element 68 is a reed switch. Reference numeral 39 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 an insulating material 40. This metal fitting 69 is fixed to the side wall 26a inside the cavity resonator 26 with mounting screws 41 and 42. 43 is a control circuit (circuit) for the above element 38
This is the leader line that connects to.

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 magnetic sensing element 38 is used as a reed switch as in this embodiment, the switch 58 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 (-1 and the directions of both 38 and 36 are both approximately parallel to the bottom surface of the heating chamber).

Next, FIG. 5 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.

Reference numerals 40b and 40c are recesses for accommodating the connecting portions that are shallower than the recess 40a, and are used to store the connecting portions between the ferromagnetic leads extending from both ends of the glass tube and the lead wire 46. 40d.

40e is an outlet for the leader line 43. 4[]f is a protrusion that is formed from the same mold and is inserted into the other matching hole 40g when the two pieces are put together and the reed switch 58 is stored. 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. Arike insulation material 40Jf'i
It is also possible to form a pair of two pieces back to back on the side opposite to the drawer openings 40d and 40e and integrally mold them so that they can be opened and closed. In this case, the protrusion 40f5 and the alignment hole 40g are unnecessary. After the reed switch 38 is housed, the insulating material 40 is made of a silicone rubber molded product.

Durability is improved by coating the outer surface with a silicone adhesive to prevent moisture from coming into contact with the ferromagnetic lead and the conductor portion of the lead wire 45.

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

The following (a), (b), (c), (d),
Due to (e), 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 15 provided on the lower outer surface of the support stand 12 attached to the bread container 1) to the bottom surface of the heating chamber 1.
There is no need to make a hole for fixing the bread container in the bottom surface of the heating chamber 1.

Φ) The attachment/detachment of the bread container 1) is detected using a magnetic field that responds to the magnetic field transmitted through the bottom surface of the heating chamber 1 from a permanent magnet '56 attached to the inner surface of the lower part of the support base 12 of the bread container 1) fixed in the heating chamber 1. Since this is done using the sensing element 38, there is no need to make a detection hole in the bottom of the heating chamber 1.

(c) To facilitate attachment and detachment of the bread container 1), an upper halogen lamp 44 is attached to the outside of the upper surface of the heating chamber 1, and a hot air heater 6 is attached to the outside of the rear surface of the heating chamber 1 so that the heater does not get in the way. The effective space within the heating chamber 1, especially the height, is greatly increased.

(Φ When bread is baked in the bread container 11, the center of the upper part of the bread approaches the top surface of the heating chamber 1 due to the expansion, but in order to obtain a good finish with less uneven baking, the bread container 1)
Place the upper halogen lamp 44 so as to avoid directly above the center of the upper part of the lamp.
are arranged, 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, making it easier to see the baking progress.

(e) The internal volume of the bread container 1) for bread is approximately 2 tons for 1 loaf and approximately 3 tons for 1.5 loaves. Moreover, the baked volume increases by 2 to 3 times that of the dough. Therefore, when sweet bread, pizza, etc. are mixed in the bread container 11 from mixing to primary fermentation, and then formed into one piece and placed on the turntable 32 for secondary fermentation to baking, the turntable 52
- is often not enough, and two are often required. In this case, in this embodiment, which bakes by blowing hot air from the side of the /IO heat chamber 1, a one-legged turntable (corral) can be stacked on top of the turntable 52 to perform two-stage cooking, which greatly improves usability. . In this way, only when the bread container 11 is applied to a hot air type microwave oven can the two-stage cooking characteristic of the hot air type open range be utilized extremely effectively.

Furthermore, the operating temperature conditions of the magnetically sensitive element 38 for detecting attachment and detachment of the storage container 1) can be made favorable, and the cost of the mounting member can be reduced.

(r) In order to make it easier to adopt the magnetic sensing element 38, which generally has a low operating temperature rating, a permanent magnet 36 is installed on 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. By attaching the magnet 36, the magnet 36 can be brought close to the bottom surface of the heating chamber 1, and the magnetically sensitive element 38 can be brought to a position far from the bottom surface of the heating chamber 1, where the temperature is lower when heating the heater. .

Q) In order to reduce the number of mounting members for the magnetically sensitive element 68, the element 58 is attached to the side wall 26a of the cavity resonator 26.

0 In order to reduce the temperature rise of the magnetic sensing element 38 at the bottom of the heating chamber 1 when heating the heater, an upper logen lamp 44 is installed on the outside of the top of the heating chamber 1, and a hot air heater 6 is installed on the outside of the heating chamber 1. ing.

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 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.

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 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, an automatic bread maker (home bakery), 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]

Figure 1 is an enlarged cross-sectional view of the main parts showing the detection means of the bread container and its mounting structure, and Figure 2 shows the storage state of the magnetically sensitive element (reed switch) viewed from the direction of arrow A [3 in Figure 1]. In the cross-sectional views, Figure 43 is an enlarged perspective view showing the shape of the insulating material surrounding the magnetically sensitive element, and Figure 4 is a cross-section of the main part when the high-frequency heating device of the present invention is used as an automatic bread maker. In figure. FIG. 5 is a sectional view of essential parts when used as an open range or a single-function microwave oven. 1...Heating chamber, 1a...Through hole. 2... High frequency oscillator, 6... Hot air heater 11
...Bread container, 12...Support stand. 13...fixing claw, 14...hanging piece. 15...Bread ingredients. 21...1st drive 1 draw. 26a... side wall. 38... Magnetic sensing element (44... Upper halogen

Claims (2)

[Claims] (1) High frequency oscillator (2) and upper halogen lamp (44
), a heating chamber (1) whose heating source is a hot air heater (6) and whose bottom surface is made of a non-magnetic metal plate; and a heating chamber (1) in which bread ingredients (15) are kneaded and baked. This bread container (11) and this bread container (11)
In order to hold the bread container (11) on 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 hook piece (13) fixed to the bottom of the heating chamber (1) and engaging with the fixing claw (13). 14) and
A permanent magnet (3) attached to the inner surface of the lower part of the support stand (12)
6), a first drive shaft (21) that drives the kneading blades (16) in the bread container (11) through the through hole (1a) in the bottom of the heating chamber (1), and a first drive shaft (21) of the drive shaft (21). The permanent magnet (
A magnetic sensing element (38) that is activated by the magnetic field from the cavity resonator (36) to detect attachment and detachment of the bread container (11) is connected to the cavity resonator (36).
A high-frequency heating device characterized in that it is attached to the side wall (26a) of 26). (2) The high frequency lamp according to claim 1, wherein two upper halogen lamps (44) are provided on the outer side of the upper surface of the heating chamber (1), and are located on the front side and the rear side of the upper center of the bread container (11), respectively. heating device.