KR890000233Y1 - Highfrequency heating device - Google Patents
Highfrequency heating device Download PDFInfo
- Publication number
- KR890000233Y1 KR890000233Y1 KR2019850009765U KR850009765U KR890000233Y1 KR 890000233 Y1 KR890000233 Y1 KR 890000233Y1 KR 2019850009765 U KR2019850009765 U KR 2019850009765U KR 850009765 U KR850009765 U KR 850009765U KR 890000233 Y1 KR890000233 Y1 KR 890000233Y1
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- KR
- South Korea
- Prior art keywords
- waveguide
- opening
- heating chamber
- heating device
- shape
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Classifications
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- 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
- H05B6/70—Feed lines
- H05B6/707—Feed lines using waveguides
- H05B6/708—Feed lines using waveguides in particular slotted waveguides
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안 고주파가열장치의 개략단면도.1 is a schematic cross-sectional view of the high frequency heating device of the present invention.
제2도는 본 고안 도파관의 개구부 잔면도.2 is a bottom view of the opening of the waveguide of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
4 : 도파관 5 : 개구부4: waveguide 5: opening
6,6' : 장방형부 7 : 협소부6,6 ': rectangle 7: narrow part
본 고안은 고주파가열장치의 도파관에 관한 것으로, 특히 도파관의 개구부를 변형시켜 가열실내로의 최대출력 전달을 용이하게 조정할 수 있고, 일정한 모드만 가열 실내로 전달하게 하여 균일가열이 향상되도록 하며 차단주파수를 용이하게 변경시킬 수 있도록 한 도파관의 개구부 구성에 관한 것이다.The present invention relates to a waveguide of a high frequency heating device, and in particular, it is possible to easily adjust the transmission of the maximum output to the heating chamber by deforming the opening of the waveguide, and to transmit only a certain mode to the heating room to improve uniform heating and to cut off It relates to an opening configuration of the waveguide so that it can be easily changed.
종래 고주파가열장치에 있어서 도파관의 개구부 형상은 직사각형이나 삼각형등의 단순한 형태이므로 가열실로 마그네트론의 최대출력을 전달하기 위하여서는 개구부 형태나 크기를 변경하여야하고, 만약 임피던스값이 적합하지 않을 경우는 스터브라는 부가적인 부속품을 도파관내에 설치하여야 하며, 또한 스터브의 크기나 직경 또는 부착위치를 결정하기 위하여 많은 시험을 실행하여야 하고, 도파관 개구브를 통하여 여러가지 모드가 가열실로 전달되므로 균일가열이 어려운 결점이 있었다.In the conventional high frequency heating device, the opening shape of the waveguide is a simple shape such as a rectangle or a triangle. Therefore, in order to transfer the maximum output of the magnetron to the heating chamber, the opening shape or size must be changed. Additional accessories have to be installed in the waveguide, and many tests have to be carried out to determine the size, diameter, or attachment location of the stub, and it is difficult to uniformly heat them because different modes are transferred to the heating chamber through the waveguide aperture.
본 고안에 있어서는 종래의 이와 같은 점을 감안하여 안출한 것으로, 도파관개구부의 단면형상이 양측으로 장방형부를 형성하고 이 두 장방형부의 중간에 협소부를 형성하여 전체적으로 "H"자형이 되게하여 캐패시터와 임피던스가 형성되도록 함으로서 가열실에 마그네트론의 최대출력을 전달하기 위한 임피던스값이 협소부의 간격을 조정하여 용이하게 이루어질 수 있도록 하고 이에 따라서 스터브라는 부품의 사용을 필요로 하지 않으며 협소부 간격을 줄이면 차단주파수가 낮아져 원하는 모드값을 가열실에 전달토록 하여 균일가열을 향상시킬수 있도록 한 것인 바, 이를 첨부도면에 의거하여 보다 상세히 설명하면 다음과 같다.In the present invention, the cross-sectional shape of the waveguide opening is formed on both sides to form a rectangular portion on both sides, and a narrow portion is formed in the middle of the two rectangular portions so that the capacitor and impedance are generally formed. This allows the impedance value for delivering the maximum output of the magnetron to the heating chamber to be easily adjusted by adjusting the spacing of the narrow part. Accordingly, the stub does not require the use of parts. The desired mode value is to be transmitted to the heating chamber to improve uniform heating, which will be described in more detail based on the accompanying drawings.
가열실(1)의 상부에 스터러팬(2)이 착설되고 이 스터러팬(2)의 상부측에 마그네트론(3)에서 발생된 마이크로웨이브가 도파관(4)을 통하여 전달될 수 있도록 한 것에 있어서, 도파관(4)의 개구부(5)의 형상을 양측의 장방형부(6)(6')와 이들의 중간을 연결하는 협소부(7)로 형성하여 전체적으로 "H"자형이 되게 한 것이다.In the installation of the stirrer fan (2) in the upper portion of the heating chamber (1) and the microwave generated in the magnetron (3) on the upper side of the stirrer fan (2) can be transmitted through the waveguide (4), The shape of the opening portion 5 of the waveguide 4 is formed by the rectangular portions 6 and 6 'on both sides and the narrow portion 7 connecting the middle thereof so as to form an "H" shape as a whole.
이와 같은 본 고안은 마그네트론(3)에서 발생한 마이크로 웨이브가 도파관(4)을 따라 가열실(1)로 전달되기전에 개구부(5)에서 협소부(7)의 간격(g)과 장방형부(6)(6')의 길이(h)에 따라 중심의 캐패시티브 효과로 차단주파수가 다르게 된다.The present invention is such that the spacing g of the narrow portion 7 and the rectangular portion 6 in the opening portion 5 before the microwaves generated in the magnetron 3 are transferred to the heating chamber 1 along the waveguide 4. Depending on the length h of 6 ', the cutoff frequency is different due to the capacitive effect of the center.
이와 같은 개구부(5)의 등가회로는가 되어 개구부(5)의 양측, 즉 장방형부(6)(6')에서는 인덕턴스 LA가 존재하고 협소부(7)에 의하여서는 캐피시티브 CB가 존재하게 된다.The equivalent circuit of the opening 5 is Inductance LA exists at both sides of the opening 5, that is, rectangular portions 6 and 6 ', and capacitive C B is present at the narrow portion 7.
따라서 도파관(4)의 실효임피던스값은 장방형부(6)(6')의 길이(h)와 협소부(7)의 간격(g)을 조정함으로써 쉽게 줄이거나 크게 할 수 있으며, 가열실(1)로의 최대출력전달을 용이하게 하도록 임피던스 매칭이 쉽게되고, 또한 협소부(7)의 간격(g)에 의한 캐패시티브 효과로 도파관(4)내의 공진주파수와 차단주파수가 일치하게 되어 원하는 모드를 가열실내로 전달할 수 있게 되고 필요없는 모드는 LA와 CB의 역활로 삭제되어 균일가열이 향상된다. 장방형부(6)(6')사이에 평행전송선로가 형성되고 이에 CB의 불연속 캐패시턴스가 존재하게 되므로 차단주파수는 fc는 간단하게 다음과 같이 나타낼 수 있다.Therefore, the effective impedance value of the waveguide 4 can be easily reduced or enlarged by adjusting the length h of the rectangular portions 6 and 6 'and the distance g between the narrow portions 7 and the heating chamber 1 Impedance matching is facilitated to facilitate maximum power transfer to the Nr, and the capacitive effect of the spacing g of the narrow portion 7 makes the resonance frequency and the cutoff frequency in the waveguide 4 coincide with each other. It can be delivered into the heating chamber and unnecessary mode is eliminated by the role of LA and C B to improve uniform heating. Since a parallel transmission line is formed between the rectangular portions 6 and 6 'and there is a discontinuous capacitance of C B, the cutoff frequency can be simply expressed as f c .
이와 같이 본 고안은 가열실로의 최대출력전달을 쉽게 조정할 수 있고 일정한 모드만 가열실내로 전달하게 하여 균일가열이 향상되며, 차단주파수를 간단히 변경할 수 있는 이점이 있다.In this way, the present invention can easily adjust the maximum output transfer to the heating chamber, and only a certain mode to be delivered to the heating chamber to improve the uniform heating, there is an advantage that can simply change the cutoff frequency.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850009765U KR890000233Y1 (en) | 1985-07-29 | 1985-07-29 | Highfrequency heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850009765U KR890000233Y1 (en) | 1985-07-29 | 1985-07-29 | Highfrequency heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR870003187U KR870003187U (en) | 1987-03-27 |
| KR890000233Y1 true KR890000233Y1 (en) | 1989-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019850009765U KR890000233Y1 (en) | 1985-07-29 | 1985-07-29 | Highfrequency heating device |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR890000233Y1 (en) |
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1985
- 1985-07-29 KR KR2019850009765U patent/KR890000233Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR870003187U (en) | 1987-03-27 |
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