JPH01265490A - 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 and a hot air heater as heat sources by detecting the attachment or removal of the pan container by means of a magnetic field of a permanent magnet attached to a support table of the pan container. CONSTITUTION:A permanent magnet 36 is attached to the lower inner surface of a support table 12 of a pan 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 pan 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 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 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 heating chamber. The claw 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 some problems.

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 uses a high-frequency oscillator and a hot-air heater as heating sources, and includes a heating chamber whose bottom surface is made of a non-magnetic metal plate, and a method for kneading bread ingredients in the heating chamber. A bread container that is used from operation to baking, a fixing claw provided on the outer surface of the lower part of a support stand fixed to the bottom of the bread container to hold the bread container on the bottom of the heating chamber, and a fixing claw fixed to the bottom of the heating chamber. .

a hook piece that engages with the fixing claw, a permanent magnet attached to the inner surface of the lower part of the support base, a first drive shaft that drives the kneading blades in the bread container through the through hole in the bottom of the heating chamber; It is equipped with a cavity resonator for radio wave sealing provided around the drive shaft, and a magnetically sensitive element that is activated by the magnetic field from the permanent magnet to detect attachment and detachment of the bread container is attached to the side wall of the cavity resonator. be.

For production 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 a hot air heater, the heater is removed from the heating chamber so that 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. .

(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. As a result, the magnetically sensitive element can be moved 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.

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

(f) Since there is no heater near the bottom of the heating chamber, the temperature rise when heating the heater near the magnetically sensitive element is small.

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 when the high-frequency heating device of the present invention is used as an automatic bread maker, will be described. With reference to this diagram, the nine devices will be divided into five components according to function and explained. That is, as these components, the first one is related to high frequency heating, the second one is related to heater heating,
The fourth is related to the bread container, the fourth is related to the rotary drive unit, and the fifth 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 made of 5US304. Reference numeral 2 denotes a high frequency excavator 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 filter 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 heater heating will be explained.

6 is a hot air heater attached to the outside of the rear surface of the heating chamber 1. 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 a second chamber housing the first 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 rotatably supported by the fan motor 9 by a Nara l-10a, a positioning spacer 10b, and a retaining ring 10c.

The components related to bread containers 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 high frequency energy is larger than the used wavelength 172 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, rotate the bread container 11 by a predetermined angle and insert the fixing claw 1 provided on the outer surface of the lower part of the support base 12 into the hook piece 14 fixed to the bottom surface of the heating chamber 1. engage. 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 shafts 1 and 7 and whose lower part engages and forms 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.

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 0.00 rpm. 26 is the drive shaft 21
This is a cavity resonator that captures high frequency energy that would otherwise leak to the outside of the heating chamber 1 along the lines 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 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. Reference numeral 30 is a leg used to separate the entire device from the installation surface and prevent 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 heated object filter 1 are set in the heating chamber 1 and used as an open range or a single-function microwave oven. 5, which is a schematic cross-sectional view of FIG.

32 is a turntable on which the heated object filter 1 is placed and moved five times. The rotor 6 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 36. 35 is a table motor connected to the second drive shaft 64 via a plurality of gears (circuits) and rotates the turntable 32 at a low speed of, for example, 5 to 10 rpm. In addition, the second
The drive shaft 34 passes through the central axis of the first drive shaft 21.
Both shaft rollers 4 and 21 are adapted to rotate independently of each other.

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

This will be explained with reference to FIG. 1, which shows an enlarged sectional view of the main part of the 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 inner surface of the lower part of the support base 12 with a stop pin 37. This permanent magnet 66 faces the magnetically sensitive element 6B via the bottom surface of the heating chamber 1.

The magnetically sensitive element filter 8 is, for example, a reed switch in which a contact portion connected to 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 38 is replaced by a lead switch.

Reference numeral 69 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 filter 9 is fixed to the side wall 26a inside the cavity resonator 26 with mounting screws 41 and 42. 43
is a leader line connecting the element filter 8 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 direction AB in FIG. 1.

When the magnetically sensitive element 68 is a reed switch as in this embodiment, the switch 38 is
The axial direction of the glass tube and the NS pole arrangement direction of the permanent magnet filter 6 are substantially parallel, and both ports 8. The direction of filter 6 is the same as 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.

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

This is a connection portion storage recess that is shallower than the recess 40a. 40d
, 4[1e is the outlet of the leader line 43. 40 f
are formed using the same mold, and the two are put together to form the reed switch 38.
This is a protrusion that is inserted into the other matching hole 40g when storing. That is, two insulating materials 40 are housed in pairs so as to surround the reed switch 38 and the connecting portion,
Insert into the recess of the mounting bracket 39. 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 protrusion 40f.

The dowel hole 40g is unnecessary. After the reed switch 38 is housed, the insulating material 40 is made of silicone rubber molded product.
Coat the outer surface with silicone adhesive.

Preventing moisture from coming into contact with the ferromagnetic lead and the conductor portion of the lead wire 46 improves durability.

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

According to the following (ω, (tj, (C)), 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 16 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.

(1) The attachment and detachment of the bread container 11 is detected by magnetic sensitivity 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 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) To facilitate attachment and detachment of the bread container 11, a hot air heater 6 is provided and the heater is removed from the heating chamber 1;
The effective space within the heating chamber 1, especially the height, is increased.

Furthermore, the following (d), (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.

(d) Magnetic sensing element filter 8 which generally has a low operating temperature rating
In order to make it easier to adopt the support base 12, the hook piece 14 does not get in the way when the bread container 11 is fixed and rotated at a predetermined angle.
A permanent magnet 36 is attached to the inner surface of the lower part, so that the magnet filter 6 can be brought closer to the bottom of the heating chamber 1, and the magnetically sensitive element filter 8 is placed at a position where the temperature is lower when heating the heater, which is further away from the bottom of the heating chamber 1. I am trying to make it possible for you to bring it with you.

(e) In order to reduce the number of mounting members for the magnetically sensitive element 38, the element filter 8 is attached to the side wall 26a of the cavity resonator 26.

(f) In order to reduce the temperature rise in the vicinity of the magnetically sensitive element filter 8 when heating the heater, the hot air heater 6 is attached to the outside of the rear surface of the heating chamber 1.

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 in the bottom 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.

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 controls the sequence from kneading to baking, as well as making rice cakes, cooked rice jam, etc. Applicable to high-frequency heating equipment that automatically selects and performs sequence control).

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 bread-breaking machine, an open range, and a single-function microwave oven, which are easy to operate, use, and clean.

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. 5 is an enlarged perspective view showing the shape of the insulator 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. in. 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. 16...fixing claw, 14...hanging piece. 15...Puff EK fee, 16...Kneading feather. 21... First drive shaft, 26... Cavity resonator. 26a... Side wall, 36... Permanent magnet. Ro8...Magnetic sensing element (reed switch).

Claims (1)

[Claims] A heating chamber (1) which uses a high frequency oscillator (2) and a hot air heater (6) as heating sources, and has at least a bottom surface made of a non-magnetic metal plate, and a heating chamber (1) in which bread ingredients (15) are heated. A bread container (11) used for everything from kneading to baking, and the lower outer surface of a support stand (12) fixed to the bottom of the bread container (11) to hold the bread container (11) on the bottom surface of the heating chamber (1). A fixing claw (13) provided on the bottom surface of the heating chamber (1) and a hook piece (14) that engages with the fixing claw (13), and a lower inner surface of the support base (12). A first drive shaft (21) that drives the attached permanent magnet (36) and the kneading blades (16) in the bread container (11) through the through hole (1a) in the bottom of the heating chamber (1), and this drive shaft. Axis (21)
and a cavity resonator (26) for radio wave sealing provided around the permanent magnet (36), and a magnetic sensing element (38) that operates by the magnetic field from the permanent magnet (36) to detect attachment and detachment of the bread container (11).
) attached to the side wall (26a) of the cavity resonator (26).