JPH01266432A - High frequency heating device - Google Patents

Abstract

PURPOSE:To eliminate the need to drill a hole for fixing a bread container in the bottom of a heating chamber by providing a fixing claw situated on the lower outer surface of a support stand secured to the lower part of a bread container and a hooking piece secured to the bottom of a heating chamber to be engaged with the fixing claw. CONSTITUTION:A fixing claw 13 situated on the lower outer surface of a support stand 12 secured to the lower part of a bread container 11, a hooking piece 14 engaged with the fixing claw 13 and secured to the bottom of the heating chamber are provided so that the bread container 11 is held to the bottom on the interior of the heating chamber. In order to secure the bread container 11 to the bottom of the heating chamber, the fixing claw 13 situated on the lower outer surface of the support stand 12 mounted to the bread container 11 may be engaged with a hooking piece 14 secured to the bottom of the heating chamber and therefore, there is not need to drill a hole for securing the bread container in the bottom of the heating chamber.

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.

Conventional technology This conventional high-frequency heating device for rice was developed in 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 at a fixed angle βf, the fixing claw formed on the fixing piece catches on the back side of the bottom of the heating chamber. The kneader can be attached to the heating chamber. The above-mentioned air 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.

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 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.

(b) Both the upper and lower heaters are located inside the heating chamber, so 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 operability.

This provides a high-frequency heating device with a stirring function that is easy to use and easy to clean.

Means for Solving the Problems The high frequency heating device of the present invention uses a high frequency oscillator, an upper plane heater, and a hot air heater as heating sources.

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 is fixed to the bottom surface 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 bottom surface of the heating chamber. The device is equipped with a magnetically sensitive element that is operated by the magnetic field from the permanent magnet that passes through the heating chamber to detect attachment and detachment of the bread container outside the heating chamber.

action With the above configuration.

(a) The bread container can be fixed in the heating chamber by engaging the fixing claw provided on the outer surface of the lower part of the support base fixed to the container with the hook 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.

(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) Using an upper plane heater and a hot air heater.

The heater is removed from the heating chamber so that the heater does not get in the way when attaching and detaching the bread container, and the effective space in the heating chamber, particularly the height, can be increased.

(d) 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.

(e) Since there is no heater near the bottom of the heating chamber, the temperature rise near the magnetically sensitive element can be suppressed to a low level when heating the heater.

Example An embodiment of the present invention will be described in detail below with reference to the drawings.

First, FIG. 4, which is a schematic cross-sectional view of the high-frequency heating device of the present invention when used as an automatic bread maker, 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 sixth 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.

The components related to high frequency heating will be explained.

Reference numeral 1 denotes a heating chamber surrounded by a metal plate that reflects high frequency energy and is provided in a high frequency heating device. At least the bottom of this heating chamber 1 is a non-magnetic metal plate.

For example, it is made of ti'5US304. Reference numeral 2 designates a high frequency oscillator 1, such as a magnetron, which supplies high frequency energy into the heating chamber 1 through a waveguide 3. 4 is a waveguide 6
The high frequency energy is irradiated into the heating chamber 1 from here at the connection port between the heating chamber 1 and the heating chamber 1 . 5 is a cooling fan for cooling the high frequency oscillator 2.

The components related to heater heating will be explained.

6 is a 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
The second fan stored in the hot air generation chamber 8a and the second circulation fan 7b'
This is a hot air generation room. 9 is the first and second circulation fan 7a
, 7b'. The first and second circulation fans 7a and 7b are connected to the motor 9 by a nut 10a, a positioning spacer 10b, and a retaining ring 10c.
is rotatably supported.

6a is an upper plane heater attached to the outside of the upper surface of the heating chamber). 44 is a heating chamber where the heat from the upper flat heater 6 is heated)
This is a heat insulating material that prevents heat from escaping to the top in order to efficiently irradiate the interior of the heating chamber 1 through the top surface of the heating chamber 1.

The components related to bread containers will be explained.

Reference numeral 11 denotes a bread container in which at least one side of the container (12) 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 this container 1)
It is a support stand fixed to the bottom of the. To fix the bread container 11 in a predetermined position, rotate the bread container 11 by a predetermined angle,
The fixing claw 13 provided on the outer surface of the lower part of the support stand 12 (heating chamber)
It engages with a hook piece 14 fixed to the bottom surface of. 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 kneads the bread ingredients 15 and uses a kneading blade to remove 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 is a driven piece whose upper part is fixed to the rotation shaft 17 and whose lower part engages to form one side of the clutch.

Components related to the rotation drive section will be explained.

Reference numeral 21 denotes a drive piece whose upper part is fitted with the driven piece 20 through the through hole 1a of the heating chamber 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 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 0 rpm. Reference numeral 26 denotes a cavity resonator that takes in high frequency energy that would otherwise leak out of the heating chamber 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 (1 omitted) that supports it rotatably.

The components related to the outer shell 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. Reference numeral 29 is a control panel for selecting a bread baking sequence as an automatic bread maker, or a heating operation as an open range or a 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, in place of the components related to the bread container shown in Fig. 4, components related to the rotational movement of the object to be heated are set in the heating chamber 1 and used as an open range or a single-function microwave oven. FIG. 5, which shows a schematic cross-sectional view of FIG. 5, will be explained.

62 is a turntable placed on the object to be heated 31' and moved nine times. Reference numeral 33 denotes a rotary table which detachably supports the turntable 32 and rotates it once. Reference numeral 64 denotes a second drive shaft that detachably supports and drives the rotary metal member. 35 is a table motor connected to the second drive shaft 34 via a plurality of gears (1 omitted) and rotates the turntable 32 at a low speed of, for example, 5 to 10 rpm. Note that 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 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.

The magnetically sensitive element 38 is, for example, a reed switch in which a contact portion connected to two tf ferromagnetic leads 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 38 is a reed switch.

Reference numeral 39 denotes a mounting bracket made of a non-magnetic metal body and having a recess with a zero-shaped cross section for accommodating a magnetically sensitive element wrapped in an insulating material 40. This metal fitting 39 is fixed to the side wall 26a inside the cavity resonator 26 with mounting screws 41 and 42. 4 is a leader line that connects the element 58 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 68 as viewed from the AB force direction in FIG. 1.

When the magnetic sensing element 38 is a reed switch as in this embodiment, the switch 38 is
The axial direction of the glass tube and the polar arrangement direction of the permanent magnet 36ONS are almost parallel, and both directions of 38.36 are set in the heating chamber)
Place it so that it is almost parallel to the bottom surface of the

Next, FIG. 6 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 connection portions, which are shallower than the recess 40a, for storing the connection portions between the ferromagnetic leads extending from both ends of the glass tube and the lead wire 43. 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 stored in pairs to surround the reed switch 38 and the connection part, and the mounting bracket 3
Insert into the recess number 9. Alternatively, the insulating materials 40 may be integrally molded in such a manner that a pair of insulating materials 40 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 projection 40f9 and the alignment hole 40g are unnecessary.

The material of the insulating material 40 is a silicone rubber molded product, and after the reed switch 38 is housed, the outer surface is coated with silicone adhesive.

Preventing moisture from coming into contact with the ferromagnetic lead and the conductor portion of the lead wire 43 improves durability.

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

Due to the following (a), (b), and (e), the high-frequency heating device of the present invention has good operability, ease of use, and easy cleaning.

(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 make a hole at the bottom.

(b) 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 the permanent magnet 36 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 b8, there is no need to make a detection hole in the bottom of the heating chamber 1.

(c) In order to make it easier to attach and detach the bread container 110, an upper flat heater 6a and a hot air heater 6 are provided, and the heaters are removed from the heating chamber 1, thereby increasing the effective space, especially the height, in the heating chamber 1. There is.

Furthermore, the following (d) and (e) make it possible to make the operating temperature conditions of the magnetically sensitive element filter 8 for detecting attachment and detachment of the bread container 1) advantageous, and to reduce the cost of the mounting member.

(d) In order to facilitate the adoption of a magnetic sensing element that generally has a low sensitivity 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 to the bottom surface of the heating chamber 1, the magnet 36 can be brought closer to the bottom surface of the heating chamber 1, and the magnetic sensing element 38
The heating chamber 1 can be brought to a position away from the bottom surface where the temperature is low during heating.

(el In order to suppress the temperature rise in the vicinity of the magnetically sensitive element 38 when heating the heater, the upper flat heater 6a' ((
The hot air heater 6 is arranged on the outer side of the upper surface of the heating chamber) and on the outer side of the rear surface of the heating chamber), so that the amount of heat transferred from the heater 6.6a to the magnetically sensitive element 38 is kept small.

Furthermore, in order to effectively use the space in the height direction within the heating chamber 1, it is preferable that the position of the contact surface between the support stand 12 and the bottom surface of the heating chamber 1 be as low as possible. therefore.

If holes are made in this contact surface, a large amount of food particles and liquid juice will easily flow down, which is undesirable.

On the other hand, there is a through hole 1a on the bottom of the heating chamber 1 through which the interlocking part and the bottom part pass, and the vicinity of this hole 1a is made convex to prevent food particles and liquid juice from flowing down.

9 In the present invention, when it is detected that a cooking container is fixed in the heating chamber, a control circuit centered on a microcomputer controls the kneading force λ of the nokun and the sequence up to baking, as well as mochi and cooking. .

It is applied to high-frequency heating equipment that automatically selects the sequence of jam, white sauce, pizza, etc. from a control panel.

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

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 the Ail arrow in Fig. 1. FIG. 6 is an enlarged perspective view showing the shape of the insulating material surrounding the magnetically sensitive element, and FIG. 4 is a cross-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. 5 is a sectional view of main parts when used as a microwave oven or a single-function microwave oven. 1... Heating chamber. 2...High frequency oscillator. 6...Hot air heater. 6a... Upper plane heater. 11...Bread container. 12...Support stand. 16...Fixing claw. 14...Hook piece. 15...Bread ingredients. Big brother...a permanent magnet.

Claims (1)

[Claims] A heating chamber (1) whose heating sources include a high frequency oscillator (2), an upper flat heater (6a), and a hot air heater (6), and whose bottom surface is made of a non-magnetic metal plate;
) in which bread ingredients (15) are kneaded and baked, and a bread container (11) that is fixed to the bottom of the bread container (11) to hold the bread container (11) on the bottom of the heating chamber (1). The fixing claw (13) provided on the lower outer surface of the supporting base (12) is engaged with the fixing claw (13), and the heating chamber (
1), a hook piece (14) fixed to the bottom surface of the support base (12), and a permanent magnet (36) attached to the lower inner surface of the support base (12);
a magnetic sensing element (38) that is operated by the magnetic field from the permanent magnet (36) that passes through the bottom of the heating chamber (1) to detect attachment and detachment of the bread container (11) outside the heating chamber (1); A high frequency heating device characterized by: