JP2589098B2 - High frequency heating equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a high-frequency heating device having a function of stirring food.

2. Description of the Related Art A conventional high-frequency heating apparatus of this type is proposed in Japanese Utility Model Laid-Open No. 55-71489.

In this configuration, a stirring vessel is removably mounted on a turntable rotatably provided in a heating chamber, and a stirring blade provided in the stirring vessel is passed through a rotating shaft of the turntable. It is detachably attached to.

Problems to be Solved by the Invention According to the above configuration, the kneading blades are stationary, and the stirring vessel itself mounted on the turntable rotates, so that it rotates at a high speed (relative to a normal turntable). The object to be heated jumps out due to inertia. Therefore, the rotation speed of the turntable during normal high-frequency heating 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 eliminate the above drawbacks,
Using a high-frequency oscillator as a heating source, a fixture is provided for fixing the support base fixed to the stirring vessel containing the food ingredients to the bottom of the heating chamber, and the material of this fixture is a metal plate of the same material as the bottom of the heating chamber. With the stirring vessel stationary, the blades provided in the stirring vessel are rotated, and either the turntable or the stirring vessel is placed in the heating chamber, and the turntable is rotated at a low speed and stirred. A speed change drive unit for rotating the kneading blades in the container at a high speed is provided.

Operation With the above configuration, when the turntable is used, the heating process can be performed while the object to be heated is rotated at a low speed of about 5 to 6 rpm. When using the stirring vessel, the stirring vessel is operated in a stationary state, and the kneading blade is rotated at a high speed of, for example, about 200 rpm to knead the food ingredients. Also, fix the fixture to the same material as the bottom of the heating chamber, for example, SUS3
The use of 04 makes it possible to prevent the above-mentioned battery action corrosion on the contact surface even when the battery is contaminated with a sap containing a large amount of water, salt and the like.

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

The configuration of the embodiment is as shown in FIG. 1 to FIG. In this embodiment, a case will be described in which the stirring container 12 is a bread container, the food ingredient 13 is a bread ingredient, and the bread ingredient 13 is kneaded and baked.

In the figure, reference numeral 1 denotes a heating chamber provided in a high-frequency heating device. Reference numeral 2 denotes a high-frequency oscillator that supplies high-frequency energy to the heating chamber 1 via the waveguide 3. 4 is an upper heater and 5 is a lower heater, which is a heating source at the time of oven cooking such as cake and bread baking. In addition, an electric heater or a gas heater may be used as a heating source, and hot air may be blown from outside the heating chamber 1. Numeral 6 denotes a tray tray for supporting a square plate 7 (FIG. 5) used for cooking an oven. 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. Reference numeral 10 denotes an outer box, and reference numeral 11 denotes a foot attached to the lower surface of the outer box 10. Reference numeral 12 denotes a bread container for kneading bread ingredients 13 composed of flour, yeast, water, etc., and baking them. Reference numeral 14 denotes a rotatable blade provided in the lower part of the bread container 12. Reference numeral 15 denotes a rotation axis of the kneading blade 14.

In FIG. 1, reference numeral 16 denotes a variable speed drive unit, which rotates a turntable 19 on which an object 18 to be heated is rotated at a low speed of 5 to 6 rpm and a table blade 22 which rotates the kneading blades 14 during baking using the bread container 12 at around 200 rpm. And a kneading motor 23 that rotates at a high speed. 17 is drive shaft A
This is for transmitting the rotational force of the kneading motor 23 to the rotating shaft 15 of the kneading blade 14 via the small pulley 24, the belt 25, the large pulley 26, and the sliding metal cylinder 30. The drive shaft A17 is made of a metal cylinder. 27 is drive shaft B
The rotation force of the table motor 22 is
Is transmitted to the rotary connecting shaft 21 of the turntable 20 that rotatably supports the rotary table. The drive shaft B27 is made of a high-frequency transmitting dielectric. 28 is a bearing A for the rotating shaft 15. 29 is a bearing B for the drive shaft A17. The drive shaft B27 penetrates through the hollow portion of the drive shaft A17. Reference numeral 31 denotes a motor mount for mounting the table motor 22 and the kneading motor 23. Reference numeral 32 denotes an air intake hole for taking in outside air into the motor mount 31 to cool electric components. 33 is a stopper for fixing the large pulley 26 to the drive shaft A17. Numeral 34 is a hollow disk receiving a thrust load of the drive shaft A17. Reference numeral 35 denotes an engagement piece made of a heat-resistant resin which is attached to a lower portion of a support fitting 36 for preventing the rotating shaft 15 from coming off upward. Reference numeral 37 denotes a cushioning material for preventing the bearing B28 from directly hitting the support fitting 36 when the kneading blade 14 rotates, thereby preventing noise. Numeral 38 is a packing made of silicone rubber or the like for preventing spilling of bread material, especially liquid, put in the bread container 12. Reference numeral 39 denotes a washer A having a small friction such as ethylene tetrafluoride, which pushes the packing 38 together with a washer B40 such as a stainless steel from above to increase the liquid sealing effect of the packing 38, and removes the bottom of the pan container 12 when the kneading blade 14 rotates. This is to prevent damage. 41 is a retaining ring for preventing the washer A39 and the washer B40 from coming off. Reference numeral 42 denotes a support for holding the bread container 12 on the bottom of the heating chamber 1. 43 is a support table 42 and a bread container
It is a rivet that fixes 12 Reference numeral 44 denotes a fixture for detachably fixing the support base 42 to the bottom of the heating chamber 1. As shown in FIG. 2, the fixture 44 is made of the same material as the bottom of the heating chamber 1 formed by drawing, for example, a metal plate such as SUS304. A circular hole 50 through which the engaging piece 35 passes. The diameter D of the circular hole 50 indicates the high-frequency free-space wavelength λ, the specific conductivity of the drive shaft B27 and the specific electric conductivity of the engaging piece 35 together with εγ. Then, the fundamental mode TE of the circular waveguide
_The diameter D where ₁₁ is the cutoff is Has been selected. Reference numeral 51 denotes a hook formed on the fixing tool 44, which hooks and engages with the foot 42a of the support base 42. Reference numeral 45 denotes a buffer member made of a conductor, which is provided below the hook 51 of the fixture 44 to prevent vibration noise caused by an impact between the bottom surface of the heating chamber 1 and the support 42 when the blade 14 rotates. It is. 52 is a hole formed in the fixing device 44,
This is for projecting the buffer member 45 into the heating chamber 1. The maximum width W of the through hole 52 is set to be equal to or less than の of the wavelength of the high frequency shortened by the relative dielectric constant of the buffer member 45. 53 is a small hole through which a set screw 54 passes. 46 is the drive shaft
A cavity wall for forming a choke cavity 47 for reducing a high frequency leaking to the outside of the heating chamber 1 through the outer periphery of A17, and made of a metal body such as aluminum die-cast. 48 is a high-frequency transmission path in the choke cavity 47 in order to reduce the vertical thickness of the choke cavity 47.
A partition plate for making the choke cavity 47 resonate by adjusting the substantial electrical length by making the 49 substantially U-shaped, and made of a metal body.

Next, the operation of the present embodiment having the above configuration will be described.

In the case of baking using the bread container 12, the bread container is placed in the heating chamber 1 as in the home bakery as shown in FIG.
12 is installed. The bread raw material 13 is put in the bread container 12, and the kneading blades 14 are rotated at about 200 rpm by the speed change drive unit 16 to knead the bread raw material 13, and then the upper and lower heaters 4, 5 or the gas and the heating by the high frequency energy are also performed. Add as appropriate,
Through processes such as fermentation and degassing by rotating the kneading blades 14 for several seconds, baking can be performed. In this case, the bread is a so-called mountain-shaped bread having the cross-sectional shape of the bread container 12 and the upper part being raised. When making bread of other shapes such as a roll bread, fermentation is performed by kneading in a bread container 12, and then the bread container 12 is taken out of the heating chamber 1, and
The bread raw material 13 can be divided according to the kind of the intended bread, rounded, placed on a square plate 7 as in an electric oven or a microwave oven as shown in FIG.

When the turntable 19 is used, as in the case of a single-function microwave oven or a microwave oven as shown in FIG. 4, the turntable 19 on which the object 18 is placed and the turntable 20 supporting the turntable 19 are connected to the heating chamber 1. The turntable 19 is rotated at 5 to 6 rpm by the speed change drive unit 16. The object to be heated 18 can be cooked by high-frequency energy supplied from the high-frequency oscillator 2 into the heating chamber 1 or the upper and lower heaters 4, 5 or gas.

Further, the bread container 12 is attached to the bottom surface of the heating chamber 1 by a hook portion 51 provided on the fixing tool 44 and a buffer member 45 sandwiched between the bottom surface of the heating chamber 1 and the support table 42 of the bread container 12 through the hole 52. In addition to the fixing, the noise due to the vibration during the rotation of the blade 14 can be prevented.

Further, since the fixture 44 and the bottom of the heating chamber 1 are made of the same metal plate, the heating chamber 1 is made of a liquid containing a large amount of water, salt, etc., which is scattered in a case other than baking, such as roast chicken or grilled fish. Even if the bottom of the
Battery action corrosion at the contact surface between the heating chamber 1 and the bottom of the heating chamber 1 can be prevented. In this embodiment, the upper and lower heaters are used.
Although the description has been made with reference to 4 and 5, even if hot air is blown from the outside of the heating chamber 1, the same cooking performance can be obtained.

In this embodiment, bread ingredients are used as the food ingredients 13. However, it goes without saying that the present invention can be applied to any food that requires stirring, such as pizza, udon and cake. Also knead feather
If you change the rotation speed to about 10,000 rpm by replacing 14 with a cutter, you can use it as a juicer for crushing dried fish and fruits.

Effect of the Invention According to the present invention, the high-speed rotation of the kneading blade or the low-speed rotation of the turntable during high-frequency heating is selectively used by the speed change driving unit, so that an appropriate cooking operation according to the purpose is performed. be able to. In addition, since the metal fittings for fixing the stirring vessel are made of a metal plate of the same material as the bottom surface of the heating chamber, the battery action corrosion can be prevented even in the case of repeated oven dishes in which the liquid juice is likely to fly. Furthermore, it can be applied to various functions such as a microwave oven, an electric oven, a home bakery, a kneader, and a juicer, which is advantageous in terms of economy and space saving, and has a great effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a high-frequency heating apparatus showing an embodiment of the present invention, FIG. 2 is a perspective view of the fixing device, and FIG. 3 is a cross-sectional view of the high-frequency heating apparatus (for home bakery, kneader, juicer). FIG. 4 is a sectional view of the same (for a microwave oven), and FIG. 5 is a sectional view of the same (for an electric oven). 1 ... heating room, 2 ... high frequency oscillator, 4 ... upper heater, 5 ...
… Lower heater, 12… Stirring container (bread container), 13 …… Food raw material (bread raw material), 14… Kone feather, 16 …… Variable speed drive unit, 18 …… Heated object, 19 …… Turntable , 42 ... Support, 44 ... Fixing device, 45 ... Buffer, 51 ... Hook, 52
…… a hole.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masaharu Tawada 33-1, Shinjuyo-ji, Kashiwa-shi, Chiba Pref.

Claims (1)

(57) [Claims] 1. A turntable (19) on which a high-frequency oscillator (2) is used as a heating source and on which an object to be heated (18) is placed and which can be rotated.
And a stirring vessel (12) for kneading the food material (13), a kneading blade (14) rotatably provided inside the stirring vessel (12), and a turntable (19). A speed change drive (16) for driving either the low-speed rotation or the high-speed rotation of the kneading blade (14), a support (42) fixed to the stirring vessel (12), and a A fixture (44) having a hook (51) for engaging and fixing with the lower end is provided. The fixture (44) is made of a metal plate of the same material as the bottom surface of the heating chamber (1). A high-frequency heating device formed to be fixed to a bottom surface.