KR20160125730A - Magnetron and cooking appliance comprising the same - Google Patents

Magnetron and cooking appliance comprising the same Download PDF

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Publication number
KR20160125730A
KR20160125730A KR1020150056556A KR20150056556A KR20160125730A KR 20160125730 A KR20160125730 A KR 20160125730A KR 1020150056556 A KR1020150056556 A KR 1020150056556A KR 20150056556 A KR20150056556 A KR 20150056556A KR 20160125730 A KR20160125730 A KR 20160125730A
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KR
South Korea
Prior art keywords
anode
disposed
magnet
magnetron
microwave
Prior art date
Application number
KR1020150056556A
Other languages
Korean (ko)
Inventor
최흥식
양재경
이영민
Original Assignee
엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020150056556A priority Critical patent/KR20160125730A/en
Publication of KR20160125730A publication Critical patent/KR20160125730A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/02—Stoves or ranges heated by electric energy using microwaves
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

The present invention relates to a magnetron capable of generating multiple microwaves with various frequencies and to a cooking appliance including the same. The magnetron according to an embodiment of the present invention comprises: a cylindrical first anode forming a first action space therein; a cylindrical second anode disposed below the first anode and forming a second action space therein; an upper magnet disposed on the upper side of the first anode; a middle magnet disposed below the first anode and above the second anode to form a magnetic field with the upper magnet; a lower magnet disposed on the lower side of the second anode and forming a magnetic field with the middle magnet; and a filament part arranged in the first action space of the first anode and the second action space of the second anode and emitting electrons to generate multiple microwaves having different frequencies by a magnetic field formed by the upper magnet, the middle magnet and the lower magnet.

Description

[0001] Magnetron and cooking appliance comprising same [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetron and a cooking device including the same, and more particularly, to a magnetron capable of generating a plurality of microwaves of various frequencies and a cooking device including the same.

In general, a cooking device is a cooking device that heats food using a heating source or a microwave. In a cooking apparatus using a microwave, a voltage is applied to a generator, and a commercial voltage applied to a high voltage generator is boosted to apply power to a magnetron generating a microwave, and a microwave generated by the magnetron is transmitted to a cavity through a waveguide. The cooking device is to heat the food by the frictional heat generated by vibrating the molecules constituting the food by irradiating the microwave generated from the magnetron to the food.

As a power source is applied to the magnetron, a thermoelectrically emitted to the cathode generates a microwave by an electromagnetic field, and outputs the microwave through the antenna.

If the frequency of the microwaves generated from the magnetron is high, the food can be heated quickly, but the food is not uniformly cooked. If the frequency of the microwave is low, the food can be uniformly cooked, but the heating of the food is delayed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetron capable of generating a plurality of microwaves at various frequencies and a cooking device including the magnetron.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a magnetron comprising: a cylindrical first anode forming a first working space therein; A cylindrical second anode disposed below the first anode and forming a second action space therein; An upper magnet disposed on the upper side of the first anode; A lower magnet disposed below the first anode and above the second anode to form a magnetic field with the upper magnet; A lower magnet disposed below the second anode to form a magnetic field with the stopped magnet; And a second action space of the first anode and the second action space of the second anode and emits electrons to excite electrons that are different from each other by a magnetic field formed by the upper magnet, the lower magnet, And a filament portion for generating a plurality of microwaves having a frequency.

According to an aspect of the present invention, there is provided a cooking apparatus including: a magnetron; A cavity having a receiving space therein so that the heating object can be received therein; And a waveguide for guiding a plurality of microwaves generated in the magnetron to the cavity.

The details of other embodiments are included in the detailed description and drawings.

According to the magnetron of the present invention and the cooking apparatus including the magnetron, one or more of the following effects can be obtained.

First, there is an advantage that a plurality of microwaves of different frequencies can be simultaneously or instantaneously emitted to quickly heat the object to be heated.

Second, a plurality of microwaves having different frequencies are generated in one magnetron, thereby saving space and cost.

Third, there is an advantage that a plurality of microwaves having different frequencies are generated in one magnetron, and parts for cooling, which is a power supply component, can be shared.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a cooking apparatus according to an embodiment of the present invention.
Fig. 2 is a sectional view of the cooking apparatus shown in Fig. 1. Fig.
3 is a cross-sectional view of a magnetron according to an embodiment of the present invention.
FIG. 4 is a perspective view of the filament part of the magnetron shown in FIG. 3; FIG.
5 is a perspective view of the bonded metal plate of the magnetron shown in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings for explaining a magnetron and a cooking device including the magnetron according to embodiments of the present invention.

FIG. 1 is a perspective view of a cooking device according to an embodiment of the present invention, and FIG. 2 is a sectional view of the cooking device shown in FIG. 1. Referring to FIG.

A cooking apparatus 100 according to an embodiment of the present invention includes a main body 102 forming an outer appearance, a cavity 134 provided in the main body 102 to receive a heating object, And a waveguide 112 for guiding the microwave generated in the magnetron 110 to the inside of the cavity 134. The microwave generated by the magnetron 110 is transmitted through the waveguide 112 to the inside of the cavity 134,

A door 106 to which a cooking window 104 is attached is coupled to a front portion of the main body 102 so as to be openable and closable and an operation panel 108 is coupled to one side of a front surface of the main body 102. The door 106 opens and closes the cavity 134. Although not shown in the drawing, a filter unit (not shown) for shielding microwaves may be provided inside the door 106. [ The operation panel 108 includes an operation portion 107 for operating the operation of the cooking appliance and a display portion 105 for displaying the operation of the cooking appliance and the like.

Inside the main body 102, a heating target 140, for example, a cavity 134 having a receiving space of a predetermined size so that food is received and cooked by microwaves is provided.

A magnetron 110 for generating a microwave is disposed outside the cavity 134. A waveguide 134 for guiding the microwave generated in the magnetron 110 to the inside of the cavity 134 is provided on the output side of the magnetron 110. [ (112).

The waveguide 112 may be formed as an opening with the opening 145 into the cavity 134 as shown in the drawing, but it is also possible that an antenna is coupled to the end. The opening 145 may be formed in various shapes such as a slot shape. Microwaves are emitted to the cavity 134 through the opening 145 or the antenna.

In this embodiment, the opening 145 is disposed on the upper side of the cavity 134, but the opening 145 can be disposed on the lower side or the side of the cavity 134, and the plurality of the openings 145 can be disposed It is possible. The same applies to the case where they are coupled through the antenna instead of the opening 145.

A power supply 114 for supplying power to the magnetron 110 is provided below the magnetron 110. The power supply unit 114 may include a high voltage transformer for boosting the power supplied to the cooking apparatus 100 to a high voltage and supplying the power to the magnetron 110 or a high output voltage generated by one or more switching elements performing a switching operation, 110).

A cooling fan (not shown) for cooling the magnetron 110 may be installed around the magnetron 110 according to the embodiment.

FIG. 3 is a cross-sectional view of a magnetron according to an embodiment of the present invention, FIG. 4 is a perspective view of a filament portion of the magnetron shown in FIG. 3, and FIG. 5 is a perspective view of a bonded metal plate of the magnetron shown in FIG. .

The magnetron 110 according to an embodiment of the present invention includes rectangular tubular yokes 1 and 2 and a cylindrical shape having a first working space 71 formed therein and disposed inside the yokes 1 and 2 A cylindrical second anode 22 disposed at a lower portion of the first anode 21 and forming a second action space 72 therein; An upper magnet 51 disposed on the upper side of the first anode 21 and an upper magnet 51 disposed on the lower side of the first anode 21 and the second anode 22 to form a magnetic field with the upper magnet 51, A lower magnet 53 disposed below the second anode 22 and forming a magnetic field with the interrupted magnet 52 and a lower magnet 53 disposed between the first anode 21 and the first action space 71, And the lower magnet 53, which are disposed in the second working space 72 of the second anode 22 and emit electrons and are formed by the upper magnet 51, the lower magnet 52 and the lower magnet 53 And a filament portion (30) for generating a plurality of microwaves having different frequencies.

The yokes 1 and 2 are formed into a rectangular tube shape to form an outer tube. The yokes 1 and 2 include a lower yoke plate 2 forming an inner space and a yoke upper plate 1 covering an upper portion of the lower yoke plate 2. [

A filter box (11) is disposed below the lower yoke plate (2). The filter box 11 is provided with a capacitor 12 for supplying power, a choke coil 13 connected to the capacitor 12 to receive a current and an external connection lead 14 extending from the choke coil 13 Respectively.

A first anode 21 and a second anode 22 are disposed in the lower yoke plate 2. The first anode 21 and the second anode 22 are formed in a cylindrical shape. The first anode 21 and the second anode 22 have openings formed at the top and bottom, respectively. A first phase magnetic pole 61 is disposed in the upper opening of the first anode 21 and a first lower magnetic pole 62 is disposed in the lower opening. A second phase magnetic pole 63 is disposed in the upper opening of the second anode 22 and a second lower magnetic pole 64 is disposed in the lower opening.

A first vane 23 disposed radially inside the first anode 21 forms a first action space 71 at a central portion of the first anode 21 and a first action space 71 is formed at a center of the filament portion 30 An upper portion is disposed. A second vane 24 radially disposed in the second anode 22 forms a second action space 72 at the center of the second anode 22 and a second action space 72 communicates with the second action space 72 of the filament 30 The lower portion is disposed.

A plurality of cooling fins 3 are installed on the outer surfaces of the first and second anodes 21 and 22 so that the heat generated from the first and second anodes 21 and 22 .

An ace 27 is provided on the upper end of the first anode 21 and an upper magnet 51 having magnetism is disposed around the ace 27. At the lower portion of the first anode 21 and the upper portion of the second anode 22, an intervening magnet 52 having magnetism is disposed. An Fresnel 28 is provided below the second anode 22 and a lower magnet 53 with magnetism is disposed around the Fresnel 28. The inside of the seal 27, the first anode 21, the second anode 22, and the F-seal 28 are kept in vacuum. A joint metal plate (16) for sealing the F / F chamber (28) is provided at the lower end of the F / A ceramic stem (15) is disposed under the bonded metal plate (16).

Above the yoke upper plate 1, the ceramic 43, the first antenna feeder 41 and the second antenna feeder 42 are disposed. The first antenna feeder 41 is connected to the first vane 23 to take out the first microwave having the first frequency generated inside the first anode 21. The second antenna feeder 42 is connected to the second vane 24 to extract a second microwave having a second frequency generated inside the second anode 22. The first microwave taken out from the first antenna feeder 41 and / or the second microwave taken out from the second antenna feeder 42 are guided in the cavity 134 through the waveguide 112.

The filament unit 30 is disposed in the first working space 71 of the first anode 21 and emits electrons to excite the first frequency by the magnetic field formed by the upper magnet 51 and the lower magnet 52 And a lower magnet 53 which is disposed in the second working space 72 of the second anode 22 and emits electrons to generate a first microwave having a lower magnet 52 and a lower magnet 53. [ A first end hat 36 disposed at an upper end of the first cathode 31, a second end plate 36 disposed at the upper end of the first cathode 31, A second end shield 38 disposed at the upper end of the second cathode 32 and a second end shield 38 disposed at the lower end of the second cathode 32. The first end shield 37, 39 fixed to the second endhats 38 through the second end shields 39 and through the first end shields 37 to the first endhats 36, A first side lid 34 fixed to the first end shield 37 through the second end shield 39 and a second side lid 34 fixed to the second end shield 39. [ And a side lead 35.

The upper end of the center lead 33 is connected to the first end hat 36 and the lower end is connected to the bonding metal plate 16. The upper end of the first side lid 34 is fixed to the first end shield 37 and the lower end is connected to the bonding metal plate 16. The upper end of the second side lid 35 is fixed to the second end shield 39 and the lower end is connected to the bonding metal plate 16.

It is preferable that the lower end of the center lead 33, the lower end of the first side lead 34 and the lower end of the second side lead 35 are spaced apart from each other at equal intervals and are connected to the bonded metal plate 16 Do.

The bonding metal plate 16 is formed with three fixing grooves 16a spaced apart from each other by 120 degrees with respect to the center and three insertion grooves 16b spaced apart from each other by a distance of 120 degrees from the center. The three connecting grooves 16b are connected to the external connecting leads 14 and the three fixing grooves 16a are connected to the lower ends of the center leads 33 and the lower ends of the first side leads 34 and the second side leads 35 are connected and fixed.

The second frequency of the second microwave generated in the second working space 72 is preferably higher than the first frequency of the first microwave generated in the first working space 71, It is preferable to be arranged in a biased manner toward the second anode 22 side.

The operation of the magnetron according to the present invention will now be described.

When current is applied through the center lead 33 and the first side lid 34, electrons are emitted from the first cathode 31 connected to the center lead 33 and the emitted electrons are positioned in the first working space 71. The magnetic field formed by the upper magnet 51 and the suspended magnet 52 is focused on the first working space 71 through the first phase magnetic pole 61 and the first lower magnetic pole 62. [ As the electrons and the magnetic field interact with each other in the first working space 71, a first microwave having a first frequency is generated. The generated first microwave is taken out through the first vane 23 and the first antenna feeder 41 and discharged through the ceramics 43 and then guided into the cavity 134 through the waveguide 112.

When an electric current is applied through the center lead 33 and the second side lead 35, electrons are emitted from the second cathode 32 connected to the center lead 33 and the second side lead 35. The emitted electrons are positioned in the second operation space 72 do. The magnetic field formed by the lower magnet 51 and the lower magnet 52 is focused on the second action space 72 through the second upper magnetic pole 63 and the second lower magnetic pole 64. [ As the electrons and the magnetic field interact in the second working space 72, a second microwave having a second frequency is generated. The generated second microwave is taken out through the second vane 24 and the second antenna feeder 42 and discharged through the ceramic 43 and then guided into the cavity 134 through the waveguide 112.

When a current is applied only to the first side lid 34, a first microwave having a first frequency is emitted into the cavity 134. When current is applied only to the second side lid 35, A second microwave having a frequency is emitted.

The first microwave having the first frequency and the second microwave having the second frequency are emitted into the cavity 134 when current is applied to both the first side lid 34 and the second side lid 35.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

1: yoke top plate 2: yoke bottom plate
3: cooling pin 21: first anode
22: second anode 23: first vane
24: second vane 30: filament part
31: first cathode 32: second cathode
33: center lead 34: first side lead
35: second side lead 41: first antenna feeder
42: second antenna feeder 51: upper magnet
52: breaking magnet 53: bottom magnet
71: first working space 72: second working space
100: a cooking apparatus 102:
110: Magnetron 112: Waveguide
134: Cavity

Claims (7)

A cylindrical first anode forming a first working space therein;
A cylindrical second anode disposed below the first anode and forming a second action space therein;
An upper magnet disposed on the upper side of the first anode;
A lower magnet disposed below the first anode and above the second anode to form a magnetic field with the upper magnet;
A lower magnet disposed below the second anode to form a magnetic field with the stopped magnet; And
A second anode disposed in the first action space of the first anode and the second action space of the second anode and emits electrons to excite electrons emitted from the first anode to the second anode through the magnetic field formed by the upper magnet, And a filament portion for generating a plurality of microwaves having a plurality of microwaves. The method according to claim 1,
The filament part
A first cathode disposed in the first working space of the first anode and emitting electrons to generate a first microwave having a first frequency by a magnetic field formed by the upper magnet and the suspended magnet; And
And a second cathode disposed in the second working space of the second anode and emitting electrons to generate a second microwave having a second frequency by the magnetic field formed by the lower magnet and the lower magnet. 3. The method of claim 2,
The filament part
A first end hat disposed at an upper end of the first cathode;
A first end shield disposed at a lower end of the first cathode;
A second end hat disposed at an upper end of the second cathode;
A second end shield disposed at a lower end of the second cathode;
A center lead fixed through the second end shield to the second end hat and fixed to the first end hat through the first end shield;
A first side lead fixed to the first end shield through the second end shield; And
And a second side lid secured to the second end shield. 3. The method of claim 2,
A first vane radially disposed within the first anode; And
And a second vane radially disposed within the second anode. 5. The method of claim 4,
A first antenna feeder connected to the first vane to extract the first microwave; And
And a second antenna feeder connected to the second vane to extract the second microwave. 3. The method of claim 2,
And the second frequency is higher than the first frequency. 7. The method according to any one of claims 1 to 6,
The magnetron;
A cavity having a receiving space therein so that the heating object can be received therein; And
And a waveguide for guiding a plurality of microwaves generated in the magnetron to the cavity.
KR1020150056556A 2015-04-22 2015-04-22 Magnetron and cooking appliance comprising the same KR20160125730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150056556A KR20160125730A (en) 2015-04-22 2015-04-22 Magnetron and cooking appliance comprising the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150056556A KR20160125730A (en) 2015-04-22 2015-04-22 Magnetron and cooking appliance comprising the same

Publications (1)

Publication Number Publication Date
KR20160125730A true KR20160125730A (en) 2016-11-01

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