CN102401403A - Frequency conversion microwave oven - Google Patents
Frequency conversion microwave oven Download PDFInfo
- Publication number
- CN102401403A CN102401403A CN2011103462051A CN201110346205A CN102401403A CN 102401403 A CN102401403 A CN 102401403A CN 2011103462051 A CN2011103462051 A CN 2011103462051A CN 201110346205 A CN201110346205 A CN 201110346205A CN 102401403 A CN102401403 A CN 102401403A
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- circuit
- voltage
- variable frequency
- capacitor
- diode
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- 238000006243 chemical reaction Methods 0.000 title abstract 2
- 238000005070 sampling Methods 0.000 claims abstract description 14
- 239000004065 semiconductor Substances 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000012797 qualification Methods 0.000 abstract description 2
- 230000005284 excitation Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
A frequency conversion microwave oven comprises a rectification circuit, a switch circuit, a voltage inverter circuit and a voltage-multiplying output circuit which are connected in sequence, wherein the voltage-multiplying output circuit is connected with a microwave excitation source, and a current sampling resistor is connected between the voltage-multiplying output circuit and the microwave excitation source in series. The microwave excitation source is a magnetron or a semiconductor power source. The current sampling resistor is connected with the control center of the variable frequency microwave oven. The voltage doubling output circuit is connected with a voltage detection circuit, and the voltage detection circuit is connected with a control center of the variable frequency microwave oven. The invention saves a current transformer detection circuit, reduces the manufacturing cost, greatly improves the qualification rate of the frequency converter and prolongs the service life of the product; the device has the characteristics of simple and reasonable structure, low manufacturing cost, low fault and long service life.
Description
Technical field
The present invention relates to a kind of variable frequency microwave stove.
Background technology
Existing variable frequency microwave stove is stable in order to control power output, generally all can be provided with current detection circuit, sees accompanying drawing 1; Traditional electric current detecting method is to adopt independent current transformer circuit to detect; The cost of manufacture of this current transformer circuit is higher, and components and parts are more, and fault rate is higher; And the coil copper wire of current transformer is thin, short circuit easily.
Summary of the invention
The object of the invention aim to provide a kind of simple and reasonable, cost of manufacture is low, fault is low, the variable frequency microwave stove of long service life, to overcome weak point of the prior art.
A kind of variable frequency microwave stove by this purpose design; Comprise the rectification circuit, on-off circuit, voltage inverter circuit and the multiplication of voltage output circuit that join successively; Multiplication of voltage output circuit and microwave driving source join, and its architectural feature is to be serially connected with current sampling resistor between multiplication of voltage output circuit and the microwave driving source.
Said microwave driving source is magnetron or semiconductor power source.
The control centre of said current sampling resistor and variable frequency microwave stove joins.
Said multiplication of voltage output circuit comprises transformer, capacitor C 9, capacitor C 10, diode D4 and diode D3; Capacitor C 9 constitutes first circuit with capacitor C 10 serial connection backs; Diode D4 and diode D3 serial connection back constitute second circuit; End after first circuit and the second circuit parallel connection is connected in series with current sampling resistor; First circuit and other end output-4000V after second circuit is parallelly connected, a termination of transformer is gone between capacitor C 9 and the capacitor C 10, and the other end of transformer inserts between diode D4 and the diode D3.
Said multiplication of voltage output circuit and voltage detecting circuit join, and the control centre of voltage detecting circuit and variable frequency microwave stove joins.
The present invention according to the microwave driving source operating voltage characteristic of micro-wave oven (4000V), at the output series current sampling resistor of the multiplication of voltage output circuit of frequency converter; The current sampling resistor of when electric current flows through microwave driving source, must flowing through then just forms certain voltage drop at the current sampling resistor place; The size of voltage drop is proportional to the size of the electric current that flows through microwave driving source; Through detecting this magnitude of voltage size, just be equivalent to detect the current value size of microwave driving source; The control centre of variable frequency microwave stove just can control the output current size based on this current value, and then controls stable power output.
The present invention has and has saved the current transformer testing circuit, has reduced cost of manufacture, and has improved the qualification rate of frequency converter greatly, has prolonged the service life of product.
That the present invention has is simple and reasonable, cost of manufacture is low, fault is low, the characteristics of long service life.
Description of drawings
Fig. 1 connects block diagram for the circuit of existing variable frequency microwave stove.
Fig. 2 is that the circuit of one embodiment of the invention connects block diagram.
Fig. 3 is that local circuit of the present invention connects sketch map.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to Fig. 2-Fig. 3; This variable frequency microwave stove; Comprise the rectification circuit, on-off circuit, voltage inverter circuit and the multiplication of voltage output circuit T that join successively, multiplication of voltage output circuit T and microwave driving source join, and are serially connected with current sampling resistor ib between multiplication of voltage output circuit T and the microwave driving source.
In the present embodiment, microwave driving source both can be magnetron, can be the semiconductor power source again.The control centre of current sampling resistor ib and variable frequency microwave stove joins.
Multiplication of voltage output circuit T and voltage detecting circuit join, and the control centre of voltage detecting circuit and variable frequency microwave stove joins.
Multiplication of voltage output circuit T comprises transformer T, capacitor C 9, capacitor C 10, diode D4 and diode D3; Capacitor C 9 constitutes first circuit with capacitor C 10 serial connection backs; Diode D4 and diode D3 serial connection back constitute second circuit; End after first circuit and the second circuit parallel connection is connected in series with current sampling resistor ib; First circuit and other end output-4000V after second circuit is parallelly connected, the termination of transformer T is gone between capacitor C 9 and the capacitor C 10, and the other end of transformer T inserts between diode D4 and the diode D3.
Claims (5)
1. variable frequency microwave stove; Comprise the rectification circuit, on-off circuit, voltage inverter circuit and the multiplication of voltage output circuit (T) that join successively; Multiplication of voltage output circuit (T) joins with microwave driving source, it is characterized in that being serially connected with between multiplication of voltage output circuit (T) and the microwave driving source current sampling resistor (ib).
2. variable frequency microwave stove according to claim 1 is characterized in that said microwave driving source is magnetron or semiconductor power source.
3. variable frequency microwave stove according to claim 1 and 2 is characterized in that the control centre of said current sampling resistor (ib) and variable frequency microwave stove joins.
4. variable frequency microwave stove according to claim 3; It is characterized in that said multiplication of voltage output circuit (T) comprises transformer (T), capacitor C 9, capacitor C 10, diode D4 and diode D3; Capacitor C 9 constitutes first circuit with capacitor C 10 serial connection backs; Diode D4 and diode D3 serial connection back constitutes second circuit, and the end after first circuit and the second circuit parallel connection is connected in series with current sampling resistor (ib), first circuit and other end output-4000V after second circuit is parallelly connected; One termination of transformer (T) is gone between capacitor C 9 and the capacitor C 10, and the other end of transformer (T) inserts between diode D4 and the diode D3.
5. variable frequency microwave stove according to claim 1 is characterized in that said multiplication of voltage output circuit (T) and voltage detecting circuit join, and the control centre of voltage detecting circuit and variable frequency microwave stove joins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103462051A CN102401403A (en) | 2011-11-05 | 2011-11-05 | Frequency conversion microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103462051A CN102401403A (en) | 2011-11-05 | 2011-11-05 | Frequency conversion microwave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102401403A true CN102401403A (en) | 2012-04-04 |
Family
ID=45883870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103462051A Pending CN102401403A (en) | 2011-11-05 | 2011-11-05 | Frequency conversion microwave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102401403A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111586911A (en) * | 2019-02-18 | 2020-08-25 | 上海点为智能科技有限责任公司 | Semiconductor and magnetron hybrid source heating system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2595063Y (en) * | 2003-01-06 | 2003-12-24 | 李善根 | Active power factor corrector with low cost |
| US20040144776A1 (en) * | 2003-01-27 | 2004-07-29 | Lg Electronics Inc. | Variable-frequency inverter microwave oven and method for controlling the same |
| CN2884685Y (en) * | 2006-03-09 | 2007-03-28 | 美的集团有限公司 | Microwave oven magnetron variable frequency power supply |
| CN101072462A (en) * | 2006-09-13 | 2007-11-14 | 阮世良 | Magnetron driving power supply and control method |
| CN201388308Y (en) * | 2008-12-31 | 2010-01-20 | 福州高奇晶圆电子科技有限公司 | Working power supply circuit for microwave oven |
| CN202747422U (en) * | 2011-11-05 | 2013-02-20 | 美的集团股份有限公司 | Variable-frequency microwave oven |
-
2011
- 2011-11-05 CN CN2011103462051A patent/CN102401403A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2595063Y (en) * | 2003-01-06 | 2003-12-24 | 李善根 | Active power factor corrector with low cost |
| US20040144776A1 (en) * | 2003-01-27 | 2004-07-29 | Lg Electronics Inc. | Variable-frequency inverter microwave oven and method for controlling the same |
| CN2884685Y (en) * | 2006-03-09 | 2007-03-28 | 美的集团有限公司 | Microwave oven magnetron variable frequency power supply |
| CN101072462A (en) * | 2006-09-13 | 2007-11-14 | 阮世良 | Magnetron driving power supply and control method |
| CN201388308Y (en) * | 2008-12-31 | 2010-01-20 | 福州高奇晶圆电子科技有限公司 | Working power supply circuit for microwave oven |
| CN202747422U (en) * | 2011-11-05 | 2013-02-20 | 美的集团股份有限公司 | Variable-frequency microwave oven |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111586911A (en) * | 2019-02-18 | 2020-08-25 | 上海点为智能科技有限责任公司 | Semiconductor and magnetron hybrid source heating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 528311, Guangdong, Foshan Town, Shunde District, Beijiao, 6 beautiful avenue, beautiful headquarters building, B District, 26 - 28 floor Applicant after: MIDEA GROUP Co.,Ltd. Applicant after: GUANGDONG MIDEA MICROWAVE AND ELECTRICAL APPLIANCES MANUFACTURING Co.,Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Applicant before: Midea Group Applicant before: GUANGDONG MIDEA MICROWAVE AND ELECTRICAL APPLIANCES MANUFACTURING Co.,Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: MEIDI GROUP CO. LTD. TO: MIDEA GROUP CO., LTD. |
|
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 528311, Guangdong, Foshan Town, Shunde District, Beijiao, 6 beautiful avenue, beautiful headquarters building, B District, 26 - 28 floor Applicant after: MIDEA GROUP Co.,Ltd. Applicant after: GUANGDONG MIDEA KITCHEN APPLIANCES MANUFACTURING Co.,Ltd. Address before: 528311, Guangdong, Foshan Town, Shunde District, Beijiao, 6 beautiful avenue, beautiful headquarters building, B District, 26 - 28 floor Applicant before: MIDEA GROUP Co.,Ltd. Applicant before: GUANGDONG MIDEA MICROWAVE AND ELECTRICAL APPLIANCES MANUFACTURING Co.,Ltd. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120404 |