JPH01265492A - High frequency heating device - Google Patents

Abstract

PURPOSE:To make it possible to fix a churning container without making a hole through a heating chamber and improve operability and ease of cleaning in a device using a high frequency oscillator as a heating source by detecting the attachment or removal of the churning container by means of a magnetic field of a permanent magnet attached to a support table of the churning container. CONSTITUTION:A permanent magnet 36 is attached to the lower inner surface of a support table 12 of a churning container 11. A magnetism sensing element 38 such as a reed switch is enclosed in an insulator 40 and housed in a metallic case 39 of nonmagnetic body and secured to a side wall 26a in a cavity resonator 26 by means of screws 41, 42. Attachment or removal of the container 11 is detected by the element 38 responsive to the magnetic field coming from the permanent magnet 36 and passing through the bottom surface of a heating chamber 1. As a result, because of the absence of a hole in the heating chamber, operability and ease of cleaning are improved without the possibility of food refuse or soup being spilled.

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, when the fixing piece protruding from the bottom of the kneader is inserted into the mounting hole provided on the bottom of the heating chamber and rotated by a predetermined angle, the fixing claw formed on the fixing piece is inserted into the heating chamber. It hooks onto the back side of the bottom and allows the kneader to be attached to the heating chamber. When the claw comes into contact with the actuator of the micro-sinch provided on the back side of the bottom of the heating chamber, and the micro-sinch is turned on, a sequence specific to the kneader can be performed.

Problems that the invention aims to solve 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 fixing, it is necessary to insert the fixing piece into the hole and rotate it by a predetermined angle, so the hole has to be large. therefore.

There was a problem in that there was a large risk that food particles, liquid juice, etc. would flow outside through this hole.

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

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

Means for Solving the Problems The high-frequency heating device of the present invention includes a heating chamber using a high-frequency oscillator as a heating source and having at least a bottom surface made of a non-magnetic metal plate;
This heating chamber includes a stirring container that performs automatic stirring cooking by combining food material pushing operation and high-frequency heating, and a support stand fixed to the bottom of the stirring container to hold this stirring container on the bottom surface of the heating chamber. A fixing claw provided on the lower outer surface of the heating chamber, a hook piece that is fixed to the bottom of the heating chamber and engages with the fixing claw, a permanent magnet attached to the lower inner surface of the support base, and a magnetic field from the permanent magnet. A magnetically sensitive element is attached to the side wall of the cavity resonator to detect attachment and detachment of the stirring vessel without making a hole in the bottom surface of the heating chamber.

action With the above configuration.

(a) The stirring 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 drill holes in the bottom of the heating chamber.

(b) The attachment and detachment of the stirring container is detected by a magnetic sensing 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 of the stirring container fixed in the heating chamber. , there is no need to provide a detection hole on the bottom of the heating chamber.

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 stirring cooking machine, will be described. With reference to this diagram, one device will be divided into four 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 the bread container, the third is related to the rotation drive unit, and the fourth 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.

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 formed of SU S 3Q4. 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 6. 4 is waveguide 3
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 blower for cooling the high frequency excavator 2.

The components related to the stirring vessel will be explained.

Reference numeral 11 denotes a stirring vessel 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 stirring container 11 in a predetermined position, the stirring container 11 is rotated by a predetermined angle, and the fixing claw 13 provided on the lower outer surface of the support base 12 is connected to the hook piece 14 fixed to the bottom surface of the heating chamber 1. engage with. 15 ba mochi, microwaveable cake,
It is a food ingredient such as jam. 16 is a stirring blade for stirring the food raw material 15.

Reference numeral 17 denotes a rotating shaft that detachably supports the stirring blade 16 and rotates it once. 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 formed 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 the large pulley 22. . A belt 23 rotatably connects the large pulley 22 and the small pulley 24.

25 is a small goury 2 for rotating the stirring blade 16.
An agitation motor connected to the agitation motor 4 rotates the agitation 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 (circuit) that rotatably supports the first drive shaft 21 is fitted into the wall of the central hollow part of the resonator 26.

The components related to the outline 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 to the outside during heating. 29
60 is a control panel for selecting the sequence as an automatic stirring cooking machine, heating operation as an open range, or a single-function microwave oven.

These feet are used to prevent damage to the installation surface.

Next, components related to the rotational movement of the object to be heated 61 are set in the heating chamber 1 instead of the components related to the stirring vessel shown in FIG. FIG. 5, which shows a schematic cross-sectional view, will be explained.

32 is a turntable on which the object to be heated 31 is placed and moved one rotation. Reference numeral 63 is 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. The filter 5 is connected to the second drive shaft 34 via a plurality of gears (circuits), and is a table motor that rotates the turntable 62 at a low speed of, for example, 5 to 10 rpm. Note that the second drive shaft 64 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 stirring container 11 and an enlarged cross-sectional view of a main part of its mounting structure.

36 is a column 12a extending downward from the upper surface of the support base 12
This is a permanent magnet attached to the lower inner surface of the support base 12 by a stopper 67. This permanent magnet 36 faces the magnetically sensitive element filter 8 via the bottom surface of the heating chamber 1. The magnetically sensitive element 38 is a reed switch in which a contact portion connected to one, 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 used as a read 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 68 wrapped in the 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. 4th lo is the above element 68'! It is a leader line connected to the i-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 magnetically sensitive element 38 is a reed switch as in this embodiment, the switch 68 is used to maximize the sensitivity.
The glass tube axis direction of the permanent magnet 56 and the NS pole arrangement direction of the permanent magnet 56 are almost parallel, and both directions of 38 and 36 are parallel to the heating chamber 1.
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 pieces of the insulating material 40 are housed in a pair so as to surround the reed switch 38 and the connecting portion, and are inserted into the recess of the mounting bracket 9. Alternatively, the insulating material 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 40f1 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 43.

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

Due to the following (1) and (b), the high-frequency heating device of the present invention is easy to operate, easy to use, and easy to clean.

(,) To fix the stirring container 11 to the bottom of the heating chamber 1.

A hook piece 1 fixed to the bottom surface of the heating chamber 1 with a fixing claw 1 provided on the outer surface of the lower part of the support stand 12 attached to the stirring container 11
4, it is not necessary to make a hole for fixing the stirring container in the bottom surface of the heating chamber 1.

(I)) Detection of attachment and detachment of the stirring container 11 is performed in the heating chamber 1.
This is done using a magnetically sensitive element 38 that responds to the magnetic field transmitted through the bottom surface of the heating chamber 1 from a permanent magnet 36 attached to the inner surface of the lower part of the support stand 12 of the stirring container 11 fixed inside.
There is no need to make a detection hole in the bottom of the heating chamber 1 either.

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 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 made convex to prevent food particles and liquid juice from flowing down.

In addition, 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 selects a sequence for cooking microwave oven-specific cake, jam, mochi, rice, etc. from the control panel. It is applied to high-frequency heating equipment that automatically performs heating.

Effects of the Invention According to the present invention, it is possible to provide a high-frequency heating bag # having multiple functions such as an automatic stirring cooking machine, an oven range, and a single-function microwave oven, which are easy to operate, use, and clean.

[Brief explanation of the drawing]

Figure 1 is an enlarged cross-sectional view of the main parts showing the detection means of the stirring vessel and its mounting structure, and Figure 2 is a cross-sectional view showing the storage state of the magnetically sensitive element (reed switch) as seen from the direction of arrow AB in Figure 1. In the figures, Fig. 3 is an enlarged perspective view showing the shape of the insulating material surrounding the magnetically sensitive element, and Fig. 4 is the main part when the high frequency heating device of the present invention is used as an automatic stirring cooking machine. FIG. 5 is a cross-sectional view of the main part when used as an open range or a single-function microwave oven. 1. Heating chamber, 2. High frequency excavator. 11... Stirring container, 12... Support stand. 13...fixing claw, 14...hanging piece. 15... Food raw material, 36... Permanent magnet. Ro8...Magnetic sensing element (reed switch).

Claims (1)

[Claims] A heating chamber (1) using a high frequency oscillator (2) as a heating source and having at least a bottom surface made of a non-magnetic metal plate;
) is a stirring container (11) that automatically stirs and cooks food ingredients (15) by a combination of stirring operation and high-frequency heating.
) and a fixing claw (13) provided on the outer surface of the lower part of the support base (12) fixed to the lower part of the stirring container (11) in order to hold the stirring container (11) on the bottom surface of the heating chamber (1). )and,
A hook piece (14) that engages with this fixing claw (13) and is fixed to the bottom surface of the heating chamber (1), a permanent magnet (36) attached to the lower inner surface of the support base (12), and a permanent magnet (36) that is attached to the bottom surface of the heating chamber (1). (1)
The heating chamber (1) is operated by the magnetic field from the permanent magnet (36) that passes through the bottom of the heating chamber (11).
) A high-frequency heating device characterized by comprising a magnetic sensing element (38) that detects without making a hole in the bottom surface.