JPH01210722A - High frequency heating device - Google Patents

Abstract

PURPOSE:To improve a kneading capability by a method wherein a driving shaft of a transmission driving part is placed at a bottom part within a heating chamber, a kneading vane within a flour container is connected to the driving shaft, the kneading vane is driven at a high speed rotation and supporting table is arranged below the flour container. CONSTITUTION:In case that a bread is to be baked through the application of a flour container 12, the container 12 is mounted within a heating chamber 1. Raw material of bread is placed in the flour container 12, a kneading vane 14 is rotated by a high speed rotating motor 23 of a transmission driving part 16 at about 200rpm so as to knead the raw material. After this operation, a heating operation is properly applied through an upper heater, a lower heater and a high frequency energy, some steps such as a fermentation and a gas removal under the rotation of the kneading vane 14 for several seconds are carried out and a time required for accomplishing a baking operation can be reduced. A reverse-rotation prohibiting means is fixed to a supporting table 42 of the container 12 so as to enable the kneading vane 14 to be rotated in a normal direction or a reverse direction, so that it is possible to improve a kneading capability for the flour container 12 which is difficult to knead.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high frequency heating device having a food stirring function.

Conventional Conventional High-frequency heating equipment of this type was developed in U.S. Pat.
This is proposed in Publication No. 89. In this configuration.

A container is detachably attached to a turntable rotatably provided in a heating chamber, and a stirring blade provided inside the container is detachably attached to a fixed shaft passing through the rotating shaft of the turntable.

Problems that the invention aims to solve According to the above configuration, the stirring blade is stationary.

Since the container attached to the turntable itself rotates, if it is attempted to rotate at high speed (relatively faster rotation than a normal turntable, for example, 20 rpm), the object to be heated will fly out due to inertia. Therefore, the rotation speed of the turntable during normal high brown wave heating is 5 to 6 r.
pm, and there was a problem that sufficient stirring performance could not be obtained.

Means for Solving the Problems The present invention has been made in order to solve the above problems, and the drive shaft of the variable speed drive unit is visible at the bottom of the heating chamber, and is used to perform everything from kneading bread ingredients to baking. Either the kneading blade inside the bread container or the turntable is connected, and the kneading blade inside the bread container is driven at high speed, e.g. 200 rpm, and the turntable is driven at low speed, e.g. 5 to 6 rpm. Then, a support stand is provided at the bottom of the bread container to fix the bread container to the bottom of the heating chamber, and by rotating the bread container in the normal rotation direction of the kneading blades, the feet of the support stand are fixed to the bottom of the heating chamber. A reversal prevention device is attached to a support base so that the kneading blade is hooked on the hook piece, and has an abutment portion that abuts against the side surface of the hook piece when the kneading blade is reversed.

Operation With the above-described structure, the turntable provided in the heating chamber and the variable speed drive section provided below the heating chamber perform heat treatment while rotating the object to be heated at a low speed of about 5 to 6 rpm. The bread container installed in the heating chamber and the transmission and drive unit installed below the heating chamber are used when the bread container is stationary, and the kneading blades are rotated at a high speed of around 20 rpm to knead the bread ingredients, then fermentation, It can be used as a home bakery after degassing, forming and fermenting, and then baking, or as a mixer at around 10.00 rpm, or as a kneading machine for other foods such as cake ingredients. Furthermore, the support stand provided at the bottom of the bread container serves to fix the bread container to the bottom of the heating chamber.
The anti-reverse device attached to the support base is designed so that when the bread container is rotated in the forward direction of the kneading blades, the foot of the support base will catch on the hook piece fixed to the bottom of the heating chamber, causing the kneading blades to rotate in the opposite direction. In this case, the abutting portion abuts against the side surface of the hook piece.

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

FIG. 1 is an enlarged sectional view of the main parts of the high-frequency heating device of the present invention, FIG. 2 is an external perspective view of a part thereof, FIG. 3 is an enlarged plan view of one part in FIG. The figure is an enlarged top view of other parts, and FIGS. 5 to 7 are sectional views of main parts showing usage conditions depending on the application.

In the figure, 1 is a heating chamber provided within the high-frequency heating device. Reference numeral 2 denotes a high frequency oscillator that supplies high frequency energy to the heating chamber 1 via a waveguide 3 for directly dielectrically heating the inside of the food. 4 is an upper heater, and 5 is a lower heater, which are heat sources for browning during open cooking such as cakes and bread baking.

Reference numeral 6 denotes a plate tray that supports a square plate 7 (FIG. 7) used during open cooking. 8 is a door for opening and closing the front entrance of the heating chamber, and 9 is an operation panel for controlling heating. Reference numeral 10 denotes an outer box, and 12) the heating chamber (1) is a leg attached to the lower surface of the outer box 10. 12 is flour and yeast.

This bread container automatically kneads bread ingredients 13 made of water and the like and bakes them by high frequency heating and heater heating. Reference numeral 14 denotes a kneading blade rotatably provided at the lower part of the bread container 12. 15 is a rotation axis of the kneading blade 14.

In FIG. 1, reference numeral 16 denotes a low-speed rotation motor 22 that rotates a turntable 19 (FIG. 6) on which an object to be heated 18 is placed at a low speed of 5 to 6 rpm, and a motor 22 for rotating the kneading blade 14 at a low speed of 20 rpm when baking bread using the bread container 12. This is a variable speed drive unit whose driving source is a high-speed rotation motor 23 that rotates at high speed in the front and rear. 17 transfers the rotational force of the high-speed rotation motor 23 to a small pulley 241 and a belt 25. Large pulley 26″
This is the first drive shaft for transmitting the power to the kneading blade 140 to the rotation shaft 15 via Jt. This first drive shaft 17 is formed from a metal cylinder. Reference numeral 27 denotes a second drive shaft for transmitting the rotational force of the low-speed rotation motor 22 to the rotational connection shaft 2) of the turntable 20 that rotatably supports the turntable 19, as shown in FIG. This second drive shaft 27 is made of a dielectric material that is transparent to high frequencies. 2 is a bearing for the first drive shaft 17, and 29 is a bearing for the rotating shaft 15, which is made of sintered metal or the like.

The second drive shaft 27 passes through the hollow part of the first drive shaft 17. First drive shaft 17. Drive shaft portion 17A with second drive shaft 27
Q Configure. Reference numeral 31 denotes a motor mounting base for mounting the low-speed rotation motor 22 and the high-speed rotation motor 23. Reference numeral 32 denotes an intake hole for drawing outside air into the motor mounting base 31 to cool electrical components. 33 is a retaining ring for fixing the large pulley 26 to the first drive shaft 17. 64 is a hollow disc that receives the thrust load of the first drive shaft 17. Reference numeral 35 denotes a driven piece that is attached by a rivet 37 or the like to the lower part of a support fitting 66 fixed to the rotating shaft 15 to prevent the rotating shaft 15 from coming off upward, and is fitted to the upper part of the first drive shaft 17 to form a dog clutch. Configure. 3
8 is a bread raw material 13 placed in a bread container 12. In particular, this is an oil seal made of silicone rubber that prevents liquid from spilling. Reference numeral 39 is a low-friction washer made of fluororesin that prevents mechanical impact on the oil seal 38 and maintains the liquid sealing effect over a long period of time.

41 is an oil seal 38. This is a retaining ring that prevents the washer 59 from coming off. Reference numeral 42 denotes a support stand that holds the bread container 12 on the bottom surface of the heating chamber. Reference numeral 43 denotes a rivet for fixing the support base 42 and the bread container 12. The bearing 29 for the rotating shaft 15 of the kneading blade 14 is press-fitted into a bearing holder 59, and this bearing holder 59 is formed integrally with the support base 42. Reference numeral 44 denotes a fixture for removably fixing the support base 42 to the bottom of the heating chamber.As shown in FIG. 4, the fixture 44 is made of the same material as the bottom of the heating chamber, for example SUS.
It is formed by drawing a No. 304 metal plate. Reference numeral 51 denotes a tensioning piece for hooking and fixing the lower end of the support base 42 of the bread container 12. Reference numeral 56 designates a small hole through which a set screw 54 is inserted to bring the periphery of the fixture 44 into close contact with the bottom surface of the heating chamber.

45 is a cushioning material made of silicone rubber that prevents noise caused by vibration when the kneading blade 14 rotates. This buffer material 45 is fixed to the lowest part of the support base 42 by a buffer support member 6 which is fixed to a column 64 provided on the support base 42 with a screw 65. Reference numeral 47 denotes a choke cavity surrounded by a metal wall for reducing high frequency waves that tend to leak to the outside of the heating chamber along the outer periphery of the first drive shaft 17. The choke cavity 47 is the first
The diameter in the direction perpendicular to the first movement shaft 17 is made larger than the thickness in the axial direction of the movement shaft 17 to form a so-called radial line, and the required height of the lower part of the heating chamber 1 is increased. The aim is to reduce the size of the entire high-frequency heating device.

Radio waves entering from the entrance 48 of the choke cavity 47 travel toward the cylindrical peripheral wall 46.

The light is reflected by the cylindrical peripheral wall 46 and returns to the inlet 48 .

The length of the radio wave propagation path 49 in the choke cavity 47 is approximately λ/
4 (λ: wavelength used).

As shown in FIG. 2, by rotating the bread container 12 in the normal rotation direction (arrow 7) of the kneading blades 14, the legs 42a of the support stand 42 are fixed to the bottom of the heating chamber. A reversal prevention tool (7) having a butt part 69a-f that hits the side surface of the hooking piece 5) when the hooking piece (51 is hooked on and the kneading blade 14 is completely reversed (arrow 7) is removed) is attached to the support base 42. By attaching the bread container 12
This prevents it from coming off during kneading operations. The reversal prevention tool 67 includes a movable piece 69 that is always pressed downward by a reversal prevention spring 68, and a movable piece 69 that is pushed up so that the lower end of the movable piece 69 is in a higher position than the tensioning piece 51, and the bread container 12 in the direction indicated by arrow 7) to be removed.

In FIG. 3, compression spring 6B, movable piece 69. knob 7
An example of the positional relationship of the shapes 0 and 9 is shown. The movable piece 69 is shown when the bread container 12 is turned to the stop direction indicated by the arrow 7).

The tapered part 69 slides on the upper part 67) of the hook piece 5)
a.

When the kneading blade 14 rotates (reversely) during the kneading operation, the abutting part 69b that hits the side surface of the hook piece 5) and the spring holding part 69c for holding the compression spring 68 are located on the removal side of arrow 7). It is formed from a sheet of metal. The knob 70 is fixed perpendicularly to the movable piece 69.

Next, the operation of this embodiment having the above configuration will be explained.

In the case of bread baking using the bread container 12, the bread container 12t is installed in the heating chamber 1 as in a home bakery as shown in FIG. Bread ingredients 13 are placed in the bread container 12, and the kneading blades 14 are rotated at around 20 rpm by the high-speed rotation motor 26 of the variable speed drive unit 16.
Step 3: Knead the dough, then add heating using upper and lower heaters 4.5 and high-frequency energy as appropriate, step 9. Ferment, and remove the gas by rotating the kneading blade 14 for a few seconds, and then bake the dough in a short time. . In this case, the bread has the cross-sectional shape of the bread container 12 and becomes a so-called mountain-shaped bread with a raised upper part. When making bread of other shapes such as rolls, knead and ferment in the bread container 12, then remove the bread container 12 from the heating chamber 1 and mix the bread ingredients 13 according to the type of bread desired. The dough can be divided, rolled, placed on a square plate 7 in the same way as an electric open or open range as shown in Fig. 7, and subjected to the process from shaping and fermentation to baking.

When using the turntable 19, as in the case of a single-function microwave oven or an open range as shown in FIG. The heating of the object to be heated 18 can be controlled by the high frequency energy supplied from the high frequency oscillator 2 into the heating chamber 1 or by the upper and lower heaters 4.5.

Note that in this example, upper and lower heaters of 4°5 are used as heating sources, but similar cooking performance can be obtained by blowing hot air from outside the heating chamber using an electric heater or gas heater as a heat source. .

Furthermore, since a reversal prevention device 67 is attached to the support base 42 of the bread container 12, the kneading blades 14 can be rotated in the forward or reverse direction at will.
The kneading ability can also be improved compared to 2.

Effects of the Invention According to the present invention, since the drive shaft of the variable speed drive unit is visible on the inner bottom surface of the heating unit, there is a kneading blade or a turntable inside the bread container for performing everything from kneading the bread ingredients to baking. The kneading blades in the bread container are driven at high speed, e.g., 200 rpm, and the turntable is driven at low speed, e.g., 5 to 6 rpm, to perform appropriate cooking operations according to the purpose. By installing a support stand at the bottom of the bread container that fixes the bread container to the bottom of the heating chamber, and rotating the bread container in the normal rotation direction of the kneading blades, the foot of the support stand can be attached to the bottom of the heating chamber. Since the kneading blade is hooked on the hook piece fixed to the holder, and a reversal prevention device with an abutment part that hits the side of the hook piece when the kneading blade is reversed is attached to the support base, the kneading blade can be rotated in the forward or reverse direction as desired. The kneading ability can be improved even for bread containers with shapes that are difficult to knead, such as rectangular ones.

Furthermore, it is possible to perform the functions of three machines such as microwave oven, electric opener, and home bakery in one machine, making it economical.
It is also advantageous in terms of space saving.

The effects of implementation are significant.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of the vicinity of the irregular drive part of a high-frequency heating device showing an embodiment of the present invention, Fig. 2 is an external perspective view of a part thereof, and Fig. 3 is a butt of some parts in Fig. 1. FIG. 4 is a top view of another component fixing device, and FIG. 4 is a sectional view of the main part when the high-frequency heating device is used as a home bakery. Figure 2 is a cross-sectional view of the main parts when the high-frequency heating device is used as a microwave oven with a turntable installed, and Figure 2 is a cross-sectional view of the high-frequency heating device when it is used as an electronic opener with a square plate installed. FIG. 1... Heating chamber, 2... High frequency oscillator. 4... Upper heater, 5 lower heaters. 12... Bread container m 13... Bread raw materials. 14... Kneading blade, 15... Rotating shaft. 16... Variable speed drive section, 17A... Drive shaft section. 19...Turntable, 42...Support stand. 42a... Foot portion, 51... Hook piece. 67... Reverse rotation prevention tool, 69b... Abutment part.

Claims (1)

[Claims] High frequency oscillator (2) and upper and lower heaters (4), (5)
In a high-frequency heating device that uses a heat generation source such as
7A) and connect it to either the kneading blades (14) or turntable (19) inside the bread container (12) for kneading the bread ingredients (13) to baking. The blade (14) is driven at high speed rotation and the turntable (19) is driven at low speed rotation, and the bread container (12) is driven at high speed rotation.
) is provided at the bottom of the bread container (12), and by rotating the bread container (12) in the normal rotation direction of the kneading blades (14), the support stand (42) is fixed to the bottom of the heating chamber (1). 42
) so that the legs (42a) of the kneading blades (
A high-frequency heating device characterized in that a reversal prevention device (67) having an abutting portion (69b) that abuts against the side surface of the hook piece (51) when the device (14) is reversed is attached to the support base (42).