JPH01213986A - High-frequency heater - Google Patents

Abstract

PURPOSE:To make suitable cooking operation possible by selectively using the high speed rotation of a kneading blade at the time of baking bread or the low speed rotation of a turn table at the time of high-frequency heating. CONSTITUTION:A high frequency oscillator 3, upper and lower heaters 4, 5 and the like are heating sources, and one of a turn table 19 on which food to be heated is put and a bread container 12 rotatably enclosing a kneading blade 14 is selectively arranged in a heating chamber 1. When the turn table 19 is used, the food to be heated is subjected to heat treatment with being made to rotate at a low speed of about 5-6rpm. At the time of using the bread container 12, It is used in a stationary state, and the kneading blade 14 is made to rotate at a high speed of, for example, about 200rpm so as to knead bread ingredients 13, and thereafter fermentation, deflation, forming fermentation and the like are performed so as to bake the bread, Further, space between the first driving shaft 17 and the second driving shaft 27 is filled with fluorine contained polymers-made bushing 67 whose friction is small, and thereby food scraps and stock are prevented from entering the space and as well malfunctioning that both shafts 17, 27 drive mutually can be avoided.

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 U.S. Pat.
This is proposed in Publication No. 89. In this configuration, a container is removably attached to a turntable that is rotatably provided in a heating chamber, and a stirring blade provided inside the container is removably attached to a fixed shaft that passes through the rotation axis of the turntable. It is.

Problems to be Solved by the Invention According to the above configuration, the stirring blade is stationary and the container itself, which is attached to the turntable, rotates. (fast rotation), the object to be heated will fly out due to inertia. Therefore, during normal high-frequency heating, the rotation speed of the turntable is limited to 5 to 6 rpm, and there is a problem that sufficient stirring performance cannot be obtained.

Means for Solving the Problems The present invention has been made to solve the above problems, and uses a high frequency oscillator as a heat source such as an upper and lower heater, a turntable on which an object to be heated is placed, and a kneader. Either one of the bread containers containing rotatable blades is selectively installed in the heating chamber, and the bread container has a variable speed drive unit that drives either the low-speed rotation of the turntable or the high-speed rotation of the kneading blades. A second MIA driving shaft is provided to open and open the turntable by penetrating the hollow part of the first driving shaft that drives the kneading blades through a through hole in the bottom of the heating chamber. A fluororesin bushing that closes the gap is fitted into the drive piece above the first drive shaft.

Operation With the above-described configuration, when the turntable is used, the heat treatment can be performed while rotating the object to be heated itself at a low speed of about 5 to 6 rpm. When using a bread container, keep the bread container stationary and use the kneading blades at 200 rpm, for example.
It is possible to knead the bread ingredients by rotating at a high speed around m and then perform fermentation, degassing, molding fermentation, etc. until baking. Furthermore, the gap between the first drive shaft and the second waste drive shaft is closed with a low-friction fluororesin bushing, which prevents food scraps and broth from entering the gap, and allows both shafts to drive each other. It is possible to avoid the erroneous operation of overlapping each other.

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

The configuration of the embodiment is as shown in FIGS. 1 to 6.

In FIGS. 4 to 6, reference numeral 1 denotes a heating chamber provided within the high-frequency heating device. 2 is a high frequency oscillator that supplies high frequency energy to the heating chamber 1 via a waveguide 3. Reference numeral 4 indicates an upper heater, and 5 indicates a lower heater, which are heat sources for baking cakes, breads, and other oven dishes. Reference numeral 6 denotes a plate tray that supports a square plate 7 (FIG. 6) used during oven cooking. 8 is a door for opening and closing the front entrance of the heating chamber 1, and 9 is an operation panel for controlling heating. 10 is the outer box, 11
are the legs attached to the bottom surface of the outer box IO. Reference numeral 12 denotes a bread container in which bread raw materials 13 made of flour, yeast, water, etc. are kneaded and heated by a heater until baked. 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 variable speed drive unit, which includes a table motor 22 that rotates a turntable 19 on which an object to be heated 18 is placed at a low speed of 5 to 6 rps+, and a table motor 22 that rotates a kneading blade 14 at a speed of 200 rpm+ when baking bread using the bread container 12. The driving source is a kneading motor 23 that rotates at high speed in the front and back. 17 is the first drive shaft, and the kneading motor 2
This is for transmitting the rotational force of No. 3 to the rotating shaft 15 of the kneading blade 14 via the small boob IJ-24, the belt 25, and the large pulley 26. Note that the first drive shaft 17 is 5US30
It is made of a metal cylinder made of highly hard stainless steel such as 3.5LIS430.5US420.

A drive piece 17a made of die-cast aluminum or zinc and suitable for machining complicated shapes is press-fitted into the upper part of the first drive shaft 17. The large pulley 26 is made of synthetic resin with good workability only on the outer periphery, and the other parts are made of metal molded plate 26.
It is a. 27 is the second drive shaft, which is the table motor 2.
This is for transmitting the rotational force of No. 2 to the rotary connection shaft 21 of the rotary table 20 which rotatably supports the turntable 19 as shown in FIG.

Furthermore, the 211th! The moving shaft 27 is made of a dielectric material that is transparent to high frequencies. 28 is the 1st II! This is a bearing A for the moving shaft 17. 29 is a bearing B for the rotating shaft 15, and is made of a sintered alloy. 211th! The moving shaft 27 is the first
II! It penetrates the hollow part of the moving shaft 17. 3
Reference numeral 1 denotes a motor mounting base for mounting a table motor 22 and a kneading motor 23. Reference numeral 32 denotes an intake hole for taking in outside air to cool electrical components. 3
3 is a nut for fixing the large pulley 26 to the 111i-th moving shaft 17. 33a is the i-th large pulley 26.
ll! This is a reinforcing plate that increases the contact area and prevents shaking when attached to the moving shaft. 34 is a hollow disc that receives the thrust load of the drive piece 17a on the upper part of the first moving shaft 17. Reference numeral 35 denotes a driven piece, which is attached by a rivet 37 or the like to the lower part of the support fitting 36 that prevents the rotating shaft 15 from being dislodged upward.
a to form a dog clutch.

Reference numeral 38 denotes an oil seal made of silicone rubber or the like to prevent the bread ingredients 13, particularly the liquid, contained in the bread container 12 from spilling. Reference numeral 42 denotes a support stand fixed to the lower part of the bread container 12 in order to hold the bread container 12 on the bottom surface inside the heating chamber 1.

Reference numeral 43 denotes a rivet for fixing the support base 42 and the bread container 12. Note that the bearing B for the rotating shaft 15 of the kneading blade 14
29 is press-fitted into a bearing holder 59, and this bearing holder 59 is formed integrally with the support base 42. A bearing holder 59 protrudes from the bottom surface of the bread container 12, but an aluminum cap 39 coated with tetrafluoroethylene resin is attached to the bearing holder so that the upper outer surface of the protruding bearing holder 59 is not directly exposed inside the bread container 12. It is fixed to the top of 59. 44 is a fixture for removably fixing the support stand 42 to the bottom of the heating chamber 1;
As shown in FIG. 2, the fixture 44 is formed by drawing a non-magnetic material made of the same material as the bottom surface of the heating chamber 1, for example, a metal plate of 5US304.

Reference numeral 51 designates a hook portion formed on the fixture 44, which engages with the foot portion 42a of the support base 42.

The above hook uses the wavelength λ of the gap size P between adjacent parts 51.
This is set to 172 or less to cut off high frequency waves that attempt to leak to the outside from the through hole 52 on the bottom of the heating chamber 1 through the gap between the support base 42 and the bottom of the heating chamber 1. Reference numeral 53 denotes a small hole through which a set screw 54 is inserted, which brings the periphery of the fixture 44 into close contact with the bottom surface of the heating chamber 1. Reference numeral 45 denotes a buffer member made of a dielectric material, and the fixture 44 is hooked to the lower part of the part 51 in order to prevent vibration noise caused by impact between the bottom surface of the heating chamber 1 and the support base 42 when the kneading blades 14 rotate. belongs to. This buffer member 45 is connected to the support column 6 provided on the support base 42.
The buffer member support 66 is fixed to the lowermost portion of the support base 42 with a screw 65. 46
is a choke cavity 47 for reducing high frequency waves that are about to leak to the outside of the heating chamber 1 through the outer periphery of the first driving shaft 17;
The cavity wall is made of a metal body such as die-cast aluminum. In order to shorten the second drive shaft 27 as much as possible and increase the effective space of the variable speed drive unit 16, the choke cavity 47 is arranged in the 11th! ! A so-called radial line is formed with a large diameter in the direction perpendicular to the moving shaft 17. The radio waves travel from the entrance 48 of the choke cavity 47 toward the cylindrical cavity wall 46, are reflected by the cavity wall 46, and return to the entrance 48.

In addition, the first II! The moving shaft 17 is connected to the through hole 5 on the bottom of the heating chamber 1.
The kneading blade 14 is driven through the through hole 52.
In order to prevent the liquid juice 49 falling as shown by the dotted arrow from entering the sliding part of the bearing A28, the ill! Moving axis 17
A waterproof plate 50 that extends around the outer periphery of the bearing A28 is provided above the bearing A28. The liquid juice 49 that has fallen onto the waterproof plate 50 falls onto the motor mount 31 through the small hole 46a made in the cavity wall 46 and the small hole 26b made in the large pulley 26, flows along the mount 31, and finally Specifically, the intake hole 32
It is designed to be discharged to the outside through the

In addition, as shown in FIG. 3, a low friction bushing 67 made of fluororesin that closes the gap between the first drive shaft 17 and the second drive shaft 27 is attached to the 11th! ! Drive shaft 17 on top of moving shaft 17
It is fitted into the upper drive piece 17a.

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 12 is installed in the heating chamber 1 as in a home bakery, as shown in FIG. The bread raw material 13 is put into the bread container 12, and the kneading blade 14 is rotated at around 200 rpm by the variable speed drive unit 16 to knead the bread raw material 13.
Heating by the lower heaters 4 and 5 and high-frequency energy may be applied as appropriate, and the dough can be baked through processes such as fermentation and degassing by rotating the kneading blades 14 for several seconds. 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, and then transfer the bread container 12 to the heating chamber 1.
The bread raw material 13 is divided into pieces according to the desired type of bread, rolled into balls, and placed on a square plate 7 in the same way as in an electric oven or microwave oven as shown in Fig. 6 to undergo the process from shaping and fermentation to baking. Can be done.

When using the turntable 19, as shown in FIG. The turntable 19 is installed in
Rotate at rpm. High frequency energy supplied from the high frequency oscillator 2 into the heating chamber 1 or the upper and lower heaters 4
, 5, the object to be heated 18 can be heated and cooked.

Furthermore, since the gap between the first driving shaft 17 and the second driving shaft 27 is closed with a bushing 67 made of fluororesin with low friction, it is possible to prevent food waste and broth 49 from entering the gap, and to prevent both shafts 17 from entering the gap. It is possible to avoid a malfunction in which the .27s give rotational driving force to each other. Further, in this embodiment, the upper and lower heaters 4 and 5 are used as heat sources, but similar cooking performance can be obtained even if hot air is blown from outside the heating chamber 1 using an electric heater or a gas heater as a heat source.

Effects of the Invention According to the present invention, the variable-speed drive unit selectively uses the high-speed rotation of the kneading blades during bread baking or the low-speed rotation of the turntable during high-frequency heating, so that cooking can be performed appropriately depending on the purpose. can be operated. In addition, the low-friction fluororesin bushing prevents food particles and broth from entering the gap between the first and second drive shafts, and also prevents malfunctions caused by one and both shafts applying rotational driving force to each other. It can be avoided.

Furthermore, it can perform the functions of three machines such as a microwave oven, electric oven, and home bakery, making it economical and
It is also advantageous in terms of space saving, and the effects of implementing it are significant.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main parts of a high-frequency heating device showing an embodiment of the present invention, Fig. 2 is a perspective view of the same fixture, and Fig. 3 is an enlarged view of the vicinity of the first drive shaft and second moving shaft. 4 is a cross-sectional view of the high-frequency heating device (for home bakery use), FIG. 5 is a cross-sectional view of the same (for microwave oven), and FIG. 6 is a cross-sectional view of the high-frequency heating device (for electric oven). 1... Heating chamber, 2... High frequency oscillator, 4...
...Upper heater, 5...Lower heater, 12...Bread container, 13...Bread raw material, 14...Kneading blade, 16...Variable speed drive unit, 17...First flavoring shaft , 17a... Drive piece, 19... Turntable, 27... Second drive shaft, 52... Through hole,
67...Bushing.

Claims (1)

[Claims] 1. High frequency oscillator (2) and upper and lower heaters (4), (5
), a turntable (19) on which an object to be heated is rotatably placed, and a bread container (12) for kneading bread ingredients (13) to baking them.
A kneading blade (14) rotatably provided inside the bread container (12), and a variable speed drive that drives either the low-speed rotation of the turntable (19) or the high-speed rotation of the kneading blade (14). The turntable (
A second drive shaft (27) for driving the first drive shaft (19) is provided, and the first drive shaft (17) and the second drive shaft (27) are mounted on the top of the drive piece (17a) press-fitted into the top of the first drive shaft (17). A high-frequency heating device characterized in that a bushing (67) is fitted to close the gap between the bushing and the bushing. 2. A high-frequency heating device in which the bushing (67) according to claim 1 is made of fluororesin.