JP2000306660A - High-frequency heater device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly and speedily heat and cook an object to be heated on each of the upper and lower stage sides in a heater chamber. SOLUTION: This device is provided with a body 1 provided with a heater chamber 2 and a heating means 8 of microwave 20 and has an upper feeding hole 7 and a lower feeding hole 16 which radiate the microwave 20 in the upper and lower parts of a side plate 5b. This device includes a turn table 10 provided on the bottom of the heater chamber 2. This device includes a cooking plate 12 that is placed at a position corresponding to the lower feeding hole 16 on the turn table 10 and receives an object 14 to be heated. In addition this device includes a cooking shelf 13 having a placement table 13a which is placed on the cooking plate 12, is arranged between the lower feed hole 16 and the upper feed hole 17, and receives the object 14 to be heated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device for heating and cooking an object to be heated housed in a heating cabinet by using microwaves having a high frequency.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view and an operation explanatory view of a conventional high-frequency heating device. In the drawing, reference numeral 1 denotes a main body of a substantially box-shaped high-frequency heating device formed of, for example, a coated steel plate having an opening on the front side, and 2 denotes a substantially box-shaped heating chamber formed in the main body 1, for example, a stainless steel material. A bottom plate 3, a back plate 4, left and right side plates 5a and 5b, and a top plate 6 are formed. The front side is opened, and a power supply port 7 is provided below the right side plate 5b. In addition, a door (not shown) is provided on the front side of the main body 1 so as to be openable and closable by a hinge (not shown), and an opening of the main body 1 and an opening of the heating chamber 2 are provided. Close.

[0003] Reference numeral 8 denotes one side of the main body 1, here the main body 1
And a magnetron 9 provided between the magnetron 8 and the right side plate 5b and communicating with the power supply port 7 and oscillating the microwave from the magnetron 8. 8 a protrudes inside the waveguide 9.

Reference numeral 10 denotes a turntable having a plurality of openings 10a rotatably provided in the vicinity of the bottom plate 3 in the heating chamber 2, and is provided below the bottom plate 3 in the main body 1. The motor 11 is connected to the motor 11 via a motor shaft 11a. Numeral 12 is a flat circular cooking dish made of a microwave permeable material such as heat-resistant glass and placed on the turntable 10, and 13 is a cooking shelf made of stainless steel wire and placed on the cooking dish 12, for example. The mounting table 13a has a substantially circular shape and a substantially net-like shape, and includes three legs 13b hanging down from the outer edge of the lower surface thereof. 14 is an object to be heated placed on the cooking dish 12, 15 is a cooking shelf 13
To be heated placed on the mounting table 13a of
5 is of the same quality and the same amount. An operation panel (not shown) including a display unit and an operation unit for performing heating and cooking is provided on the right front side of the main body 1.

[0005] In the high-frequency heating apparatus configured as described above, when the objects to be heated 14 and 15 are to be cooked, first,
As shown in FIG. 3, the object to be heated 14 is placed on the cooking dish 12 by opening the door, the cooking shelf 13 is placed on the cooking dish 12, and the heating object 15 is placed on the placing table 13a. Place and close the door. Then, by operating the operation unit of the operation panel provided on the main body 1 to select a cooking menu, set a cooking time, and start cooking, the magnetron 8 is operated.
Operates to oscillate microwaves 20 from the antenna 8a. Then, the microwave 20 is supplied to the power supply port 7 through the waveguide 9.
From the heating chamber 2. At the same time, the motor 11
Is also driven, and the turntable 10 is rotated at a cycle of one rotation in about 10 seconds. When the turntable 10 rotates, the cooking plate 12, the cooking shelf 13, and the objects to be heated 14, 15 mounted thereon also rotate.

[0006] During the heating cooking, the microwaves 20 radiated into the heating cabinet 2 are diffused in the heating cabinet 2 and, as shown in FIG. 3, the bottom plate 3, the back plate 4, the left and right side plates 5a, 5B and the top plate 6 as well as the cooking shelf 13. The objects to be heated 14 and 15 are heated and cooked by the microwaves 20 which are diffused, reflected and irradiated in the heating chamber 2.

[0007]

The conventional high-frequency heating apparatus as described above is radiated from the power supply port 7 into the heating chamber 2,
By the microwave 20 reflected by the bottom plate 3, the back plate 4, the left and right side plates 5a and 5b, the top plate 6, and the cooking shelf 13,
The object to be heated 14 on the cooking plate 12 and the object to be heated 15 on the mounting table 13a of the cooking shelf 13 are heated and cooked. However, the object to be heated 14 placed on the cooking dish 12, that is, on the lower stage side of the heating cabinet 2, has the microwave 20 from the power feeding port 7 because the cooking dish 12 is arranged near the power feeding port 7. Although the microwave 20 is directly radiated and the microwave 20 reflected by the bottom plate 3 and the cooking shelf 13 and the like is irradiated in a large amount, the microwave placed on the mounting table 13a of the cooking shelf 13, that is, on the upper side of the heating chamber 2 is heated. The object 15 has the microwave base 2 from the power supply port 7 because the mounting table 13a is disposed apart from the power supply port 7.
0 is not directly irradiated, and the back plate 4 and the left and right side plates 5
Many of the microwaves 20 reflected by a, 5b and the top plate 6 were not irradiated. The microwave 20 reflected by the back plate 4 and the like is attenuated for each reflection, so that the object to be heated 1
5 was weak when irradiated. For this reason, the object to be heated 14 placed on the lower side can be heated uniformly in a short time, but the object to be heated 15 placed on the upper side takes a long time to cook and uneven heating. And the objects to be heated 14 and 15 could not be uniformly heated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and heats and uniformly heats objects to be heated placed on the upper side and the lower side in a heating chamber, respectively. It is an object of the present invention to provide a high-frequency heating device that can perform the heating.

[0009]

SUMMARY OF THE INVENTION A high-frequency heating apparatus according to the present invention includes a main body having a heating chamber therein, and a heating means for generating microwaves on one side of the heating chamber, and a heating chamber for the main body. An upper power supply port and a lower power supply port that are respectively provided at an upper portion and a lower portion of a side plate between the heating means and the microwave radiated by the heating means, and are rotatably provided at the bottom of the heating chamber. A rotating plate, a cooking plate disposed on a position corresponding to the lower power supply port on the rotary plate and on which the object to be heated is placed, and a lower power supply port and an upper power supply port placed on the cooking plate. And a cooking rack having a mounting table on which the object to be heated is mounted and which is placed between them.

Further, in the high frequency heating apparatus according to the present invention, the mounting table of the cooking shelf is provided with an annular outer frame and a microwave wavelength of 4 mm.
A vertical rail arranged in the outer frame at an interval of one-half length, and an interval of one-fourth the wavelength of the microwave,
A substantially net-like inner frame composed of horizontal rails arranged in the outer frame so as to be substantially perpendicular to the vertical rails.

Further, the high-frequency heating device according to the present invention comprises:
The rotating disk is made up of an annular outer frame and a quarter of the microwave wavelength.
Vertical rails arranged in the outer frame at an interval of the length, and having an interval of a quarter of the wavelength of the microwave and arranged in the outer frame so as to be substantially orthogonal to the vertical rails And a substantially net-like inner frame composed of horizontal rails.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a sectional view and an operation explanatory view of Embodiment 1 of the present invention. The same parts as those of the conventional example described with reference to FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted. In the figure, reference numeral 16 denotes a lower power supply port provided below the right side plate 5b and communicates with the waveguide 9, and 17 denotes an upper power supply port provided above the right side plate 5b and communicates with the waveguide 9. The microwave oscillated from the antenna 8 a of the magnetron 8 protruding substantially at the middle part of the inside is radiated into the heating chamber 2 from the lower power supply port 16 and the upper power supply port 17. In the heating cabinet 2, the cooking dish 12 is disposed at a position corresponding to the lower power supply port 16 on the turntable 10,
The mounting table 13a of the cooking shelf 13 is disposed between the upper end of the lower power supply port 16 and the lower end of the upper power supply port 17, and the object 14 to be heated on the cooking dish 12 is connected to the bottom plate 3 and the mounting table 13a. The object 15 to be heated placed on the mounting table 13a is located in the lower space 18 on the lower side of the heating chamber 2 formed between the
It is configured so as to be located in an upper space portion 19 which is an upper stage side of the heating chamber 2 formed between 3a and the top plate 6.

In the high-frequency heating apparatus thus configured, when the objects to be heated 14 and 15 are to be cooked, first,
As shown in FIG. 1, the door (not shown) is opened, the object to be heated 14 is placed on the cooking dish 12, the cooking shelf 13 is placed on the cooking dish 12, and the work table 13a is placed on the loading table 13a. The object to be heated 15 is placed, and the door is closed. Then, by operating an operation unit of an operation panel (not shown) provided on the main body 1 to select a cooking menu and set a cooking time and start cooking, the magnetron 8 is operated and the antenna 8a is operated. Microwave 20 is oscillated. And the microwave 20
Are the lower feed port 16 and the upper feed port 17 via the waveguide 9.
From the heating chamber 2 evenly. At the same time, the motor 11 is also driven, and the turntable 10 is rotated at a cycle of one rotation in about 10 seconds. When the turntable 10 rotates, the cooking plate 12, the cooking shelf 13, and the object to be heated 14,
15 also rotates.

During heating cooking, the heating chamber 2
The microwave 20 radiated into the inside is diffused in the heating chamber 2, but is directly radiated to the object to be heated 14 located in the vicinity of the lower power supply port 16 and located in the lower space 18 as shown in FIG. 1. In addition, the heat is reflected by the bottom plate 3, the back plate 4, the left and right side plates 5 a and 5 b and the cooking shelf 13 of the heating chamber 2 corresponding to the lower space portion 18, and is irradiated to the object to be heated 14 and heated. The microwaves 20 radiated from the upper power supply port 17 into the heating chamber 2 are diffused in the heating chamber 2, but are arranged near the upper power port 17 and in the upper space 19 as shown in FIG. Is heated by directly irradiating the object to be heated 15 located at a position above the back plate 4, the left and right side plates 5a and 5b, the top plate 6 and the mounting table 13a of the cooking shelf 13 corresponding to the upper space portion 19.
Then, the object 14 is irradiated and heated. And
When the set cooking time has elapsed, the operation of the magnetron 8 is stopped, the driving of the motor 11 is also stopped, and the heating of the objects 14 and 15 is completed.

As described above, the object to be heated 14 placed on the cooking dish 12, that is, in the lower space 18 of the heating chamber 2, is directly irradiated with the microwave 20 from the lower power supply port 16, The microwave 20 reflected by the bottom plate 3, the back plate 4, the left and right side plates 5 a, 5 b and the cooking shelf 13 of the heating cabinet 2 corresponding to the space 18 is irradiated and heated and cooked.
The object to be heated 15 placed on the mounting table 13 a, that is, in the upper space 19 of the heating chamber 2, is directly irradiated with the microwaves 20 from the upper power supply port 17 and corresponds to the upper space 19. The microwave 20 reflected by the back plate 4, the left and right side plates 5a and 5b, the top plate 6 and the mounting table 13a of the heating chamber 2 is irradiated and cooked. Thereby, the object 1 to be heated placed in the lower space 18 and the upper space 19 respectively.
Microwaves 20 are applied to microwaves 4 and 15 in substantially the same manner.
Irradiation can be performed efficiently while suppressing attenuation of 0, and a high-frequency heating apparatus capable of performing uniform heating in a short time without uneven heating can be obtained.

Embodiment 2 FIG. 2 is a plan view of a cooking rack according to Embodiment 2 of the present invention. This Embodiment 2
In the cooking shelf 13 according to Embodiment 1, the mounting table 1
3a is replaced with an annular outer frame 21 made of, for example, stainless steel.
And 1/4 of the wavelength λ of the microwave 20 (here, λ = 122 mm), that is, 1 /
The vertical bars 22a arranged in the outer frame 21 at intervals of 4λ (30.5 mm), and are made of the same material, have an interval of ４λ, and are substantially perpendicular to the vertical bars 22a. A substantially net-like inner frame 22 composed of horizontal rails 22b arranged in the outer frame 21.

Here, the relationship between the bars of the inner frame 22 of the mounting table 13a and their arrangement will be described. The microwave 20 has a sine wave, the wavelength λ of which is about 122 mm, and a portion at a half of the wavelength λ (１ ／ λ: 61 mm) is a strong electric field portion having the strongest electric field. Microwave 20 having this characteristic
It is necessary to arrange a plurality of accumulation units arranged at intervals of a length of 1 / 2λ in order to accumulate. Therefore, in the second embodiment, the vertical rail 22a and the horizontal rail 22b are reduced to 1/4.
Arranged at intervals of the length of λ, the vertical rail 22a and the horizontal rail 22b
Are arranged so as to correspond to the strong electric field portion (1 / 2λ). In the opening 22c formed by the vertical rail 22a and the horizontal rail 22b, the inner length m between the adjacent vertical rails 22a or between the horizontal rails 22b is shorter than the wavelength λ of the microwave 20.

With this configuration, substantially the same operation and effect as those of the first embodiment can be obtained, and the inner frame 22 in which the vertical rails 22a and the horizontal rails 22b are arranged at intervals of 1 / 4λ is used. The microwaves 20 can be reliably accumulated on the vertical rails 22a and the horizontal rails 22b by the rotating mounting table 13a during heating and cooking. In particular, the upper space portion 19 mounted on the mounting table 13a Heating can be promoted by irradiating the object 20 to be heated 15 with the microwave 20 in a concentrated manner. Thereby, not only the heating and cooking of the object to be heated 14 placed in the lower space 18 but also the upper space 1
The microwaves 20 radiated from the upper power supply port 17 can be concentrated on the mounting table 13a on the object to be heated 15 placed in the inside 9, and the heating effect and the cooking efficiency can be improved. Further, the upper power supply port 17 is controlled by the mounting table 13a.
Leakage of the microwaves 20 radiated from the microwave into the lower space 18 can be reduced, and a high-frequency heating device capable of heating and cooking the objects to be heated 14 and 15 uniformly and in a short time can be obtained.

Embodiment 3 In the third embodiment, similarly to the mounting table 13a of the cooking shelf 13 according to the second embodiment, the rotating disk 10 according to the first embodiment is formed of an annular outer frame made of, for example, a stainless material, and is formed of, for example, a stainless material. Vertical rails arranged in the outer frame at intervals of 1 / 4λ,
And a substantially net-like inner frame composed of horizontal bars arranged in an outer frame so as to be substantially perpendicular to the vertical rails and made of the same material and having a length of 1 / 4λ.

With this configuration, substantially the same operation and effect as those of the first and second embodiments can be obtained, and the object to be heated 14 placed in the lower space 18 can be connected to the lower power supply port 16. The microwave 20 to be radiated is
And the heating effect and the cooking efficiency can be improved.

[0021]

As described above, the high-frequency heating apparatus according to the present invention has a heating chamber therein, a heating chamber for generating microwaves on one side of the heating chamber, and a heating chamber for the main body. An upper power supply port and a lower power supply port that are respectively provided at an upper portion and a lower portion of a side plate between the heating means and the microwave radiated by the heating means, and are rotatably provided at the bottom of the heating chamber. A rotating plate, a cooking plate disposed on a position corresponding to the lower power supply port on the rotary plate and on which the object to be heated is placed, and a lower power supply port and an upper power supply port placed on the cooking plate. And a cooking shelf having a mounting table on which an object to be heated is placed, so that the object to be heated placed on the cooking dish on the lower side of the heating chamber can be micro- Waves are radiated directly and microwaves reflected in the heating chamber are radiated The object to be heated, which is heated and cooked and placed on the mounting table of the cooking shelf on the upper side of the heating chamber, is directly irradiated with the microwave from the upper power supply port, and is reflected in the heating chamber. Waves are irradiated and cooked. This makes it possible to irradiate the microwaves to the objects to be heated placed on the upper and lower sides of the heating chamber in substantially the same manner while suppressing the attenuation of the microwaves. It is possible to obtain a high-frequency heating device capable of performing heating cooking in a short time.

Further, in the high-frequency heating apparatus according to the present invention, the mounting table of the cooking shelf is provided with an annular outer frame and a microwave wavelength of 4 mm.
A vertical rail arranged in the outer frame at an interval of one-half length, and an interval of one-fourth the wavelength of the microwave,
Since it is composed of a substantially net-like inner frame composed of horizontal rails arranged in an outer frame so as to be substantially perpendicular to the vertical rails, microwaves can be reliably collected on the vertical rails and the horizontal rails, and in particular, the mounting table The heating can be promoted by intensively irradiating the microwave to the upper-side object to be heated placed thereon. As a result, microwaves radiated from the upper power supply port can be concentrated on the mounting table, as well as heating and cooking of the object to be heated placed on the lower stage side. In addition, the heating effect and the cooking efficiency can be improved. In addition, the mounting table can also reduce the leakage of microwaves radiated from the upper feed port to the lower stage,
It is possible to obtain a high-frequency heating apparatus capable of heating and cooking the objects to be heated on the upper side and the lower side uniformly and in a short time.

Further, the high-frequency heating device according to the present invention comprises:
The rotating disk is made up of an annular outer frame and a quarter of the microwave wavelength.
Vertical rails arranged in the outer frame at an interval of the length, and having an interval of a quarter of the wavelength of the microwave and arranged in the outer frame so as to be substantially orthogonal to the vertical rails And a substantially net-like inner frame consisting of horizontal rails, so that microwaves radiated from the lower power supply port can be concentrated on the rotating plate on the object to be heated placed on the lower side, thereby improving the heating effect and cooking. A high-frequency heating device that can improve efficiency is obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view and an operation explanatory view of a first embodiment of the present invention.

FIG. 2 is a plan view of a cooking rack according to Embodiment 2 of the present invention.

FIG. 3 is a sectional view and an operation explanatory view of a conventional high-frequency heating device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body, 2 heating cabinet, 5b right plate, 8 magnetron, 10 turntable, 12 cooking dish, 13 cooking shelf, 13
a mounting table, 14, 15 object to be heated, 16 lower power supply port, 17 upper power supply port, 20 microwave, 21 outer frame, 22 inner frame, 22a vertical beam, 22b horizontal beam.

Continued on the front page F term (reference) 3K090 AA01 AA20 BA01 CA16 DA01 EA01 EA02 EA10 3L086 AA01 BA08 BB08 BB13 BB20 BF07 DA07 DA12

Claims (3)

[Claims] 1. A main body having a heating chamber therein, and a heating means for generating microwaves on one side of the heating chamber, an upper portion of a side plate between the heating chamber of the main body and the heating means, and An upper power supply port and a lower power supply port respectively provided at a lower portion and radiating microwaves oscillated by the heating means into the heating chamber; a rotating disk rotatably provided at a bottom of the heating chamber; A cooking dish disposed on a panel at a position corresponding to the lower power supply port and on which the object to be heated is placed, and placed on the cooking dish and disposed between the lower power supply port and the upper power supply port; And a cooking shelf having a mounting table on which the object to be heated is mounted. 2. A mounting table for a cooking shelf, comprising: an annular outer frame; a vertical bar arranged in the outer frame at an interval of a quarter of the wavelength of the microwave; And a substantially net-like inner frame composed of horizontal rails arranged in the outer frame so as to be substantially orthogonal to the vertical rails. Item 7. The high-frequency heating device according to Item 1. 3. A rotating disk comprising: an annular outer frame; a vertical rail arranged in the outer frame at an interval of a quarter of the wavelength of the microwave; and a quarter of the wavelength of the microwave. And a substantially net-like inner frame comprising horizontal rails arranged in said outer frame so as to have a length of 1 and being substantially perpendicular to said vertical rails. 2. The high-frequency heating device according to 2.