JPH01265491A - High frequency heating device - Google Patents

Abstract

PURPOSE:To make it possible to fix a pan 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 a 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 a microswitch provided on the back side of the bottom of the heating chamber, and the microswitch is turned on, a dedicated sequence 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 risk that a large amount of food particles, liquid juice, etc. would flow out from 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;
There is a stirring container that performs cooking using a combination of stirring and high-frequency heating of food ingredients in this heating chamber, and a lower outer surface of a support that is fixed to the bottom of the stirring container to hold this stirring container on the bottom surface of the heating chamber. The provided fixing claw, the hook piece that is fixed to the bottom of the heating chamber and engages with the fixing claw, the permanent magnet attached to the inner surface of the lower part of the support base, and the stirring blade in the stirring container are heated. It is equipped with a first drive shaft that is driven through a through hole in the bottom of the chamber, and a cavity resonator for radio wave sealing provided around this drive shaft, and is operated by the magnetic field from the permanent magnet to attach and detach the stirring container. A magnetic sensing element is attached to the side wall of the cavity resonator to detect the temperature without making a hole in the bottom 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.

Recommendation) 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 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.

(C) 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, 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, the nine devices 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 stirring vessel, the sixth is related to co-rotating drive unit,
The fourth is the outline relationship. 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 5US504. Reference numeral 2 denotes a high frequency oscillator 1, such as a magnetron, which supplies high frequency energy into the heating chamber 1 through a waveguide filter. 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 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 the stirring 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 indicates food ingredients such as foods made of microwaveable cake mix and milk. 16
is a stirring blade for stirring the food raw material 15.

17 is 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. 19C is 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 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.

A small pulley 2 is used to rotate the stirring blade 16 by 25 steps.
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
This is a control panel for selecting an automatic cooking sequence using a combination of push-button operation and high-frequency heating, or a heating operation as an oven range or 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, when components related to the rotational movement of the object to be heated 31 are set in the heating chamber 1 instead of the components related to the stirring container shown in FIG. 4, and used as an oven range or a single-function microwave oven. 5, which is a schematic cross-sectional view of FIG.

32 is a turntable on which the object to be heated 31 is placed and moved twice. Reference numeral 33 denotes a rotary table that detachably supports the turntable 62 and rotates it once. 64 is a second drive shaft that detachably supports and drives the rotary table 63. 35 is a table motor connected to the second drive shaft 34 via a plurality of gears (circuits) and rotates the turntable 32 at a low speed of, for example, 5 to 1 Q rpm. In addition, the second
The drive shaft 34 passes through the central axis of the first drive shaft 21.
Both shafts 34.21 are adapted to rotate independently of each other.

Next, a detection means for detecting attachment and detachment of the stirring container 11.

□ Fig. 1, which shows an enlarged sectional view of the main part of the mounting structure, will be explained.

The filter 6 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 filter 8 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 a reed switch.

The filter 9 is a mounting bracket made of a non-magnetic metal body and has a recess with a U-shaped cross section in which a magnetically sensitive element 58 wrapped in an insulating material 40 is housed. This metal fitting 69 is fixed to the side wall 26a inside the cavity resonator 26 with mounting screws 41 and 42. 46
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 magnetically sensitive element filter 8 is a reed switch as in this embodiment, in order to maximize the sensitivity, the switch filter 8 is
The axial direction of the glass tube and the N/S pole arrangement direction of the permanent magnet 3 are almost parallel, and both the 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.

401), 40C is a place where the connecting portion between the ferromagnetic leads coming out from both ends of the glass tube and the lead wire 43 is housed.

This is a connection portion storage recess that is shallower than the recess 40a. 40d
.

40e is an outlet for the leader line 46. 40f is a protrusion formed of the same mold and inserted into the other matching hole 40g when the reed switch 68 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 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 68 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 (a), (b), and (C), the high-frequency heating device of the present invention has good operability, ease of use, and easy cleaning.

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

A hook piece 1 has a fixing claw 13 provided on the outer surface of the lower part of the support stand 12 attached to the stirring container 11 fixed to the bottom surface of the heating chamber 1.
4, it is not necessary to make a hole for fixing the stirring container in the bottom surface of the heating chamber 1.

←) The attachment and detachment of the stirring container 11 is detected by magnetic sensitivity that responds to the magnetic field transmitted through the bottom surface of the heating chamber 1 from the permanent magnet 66 attached to the inner surface of the lower part of the support stand 12 of the stirring 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.

Furthermore, the cost of the mounting member for the magnetically sensitive element 38 that detects attachment and detachment of the stirring container 11 can be reduced by (C) described below.

(C) In order to reduce the number of mounting members for the magnetically sensitive element 68, the element 38 is attached to the side wall 26a of the cavity resonator 26.

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.

9. When the present invention detects that a cooking container is stuck in the heating chamber, a control circuit centered on a microcomputer controls the sequence of cooking microwave-specific cakes, jams, white sauce, rice cakes, rice cakes, etc. Applicable to high-frequency heating equipment that is automatically selected from a panel.

Effects of the Invention According to the present invention, it is possible to provide a high-frequency heating device 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.

Furthermore, the cost of the mounting member for the magnetically sensitive element that detects the stirring container 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 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. 6 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. In the cross-sectional view, Figure 5 is a cross-sectional view of the main parts when used as an open range or single-function microwave oven. 2... High frequency oscillator, 11... Stirring container. 12... Support stand, 13... Fixing claw. 14... Hook piece, 15... Food raw material. 16... Stirring blade, 21... First drive shaft.

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;
) in which the food ingredients (15) are cooked in a combination of stirring operation and high-frequency heating. 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 container (11) and a fixing claw (13) fixed to the bottom surface of the heating chamber (1) and engaged with the fixing claw (13). The hook piece (14), the permanent magnet (36) attached to the lower inner surface of the support base (12), and the stirring blade (16) in the stirring container (11) are connected to the through hole in the bottom of the heating chamber (1). (1a) and a first drive shaft (21) driven through the drive shaft (21).
) and a cavity resonator (26) for radio wave sealing provided around the heating chamber (1). A high-frequency heating device characterized in that a magnetic sensing element (38) for sensing without opening the cavity is attached to the side wall (26a) of the cavity resonator (26).