CN2935699Y - Portable AC-DC dual-purpose frequency changing microwave oven - Google Patents
Portable AC-DC dual-purpose frequency changing microwave oven Download PDFInfo
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- CN2935699Y CN2935699Y CN 200620123594 CN200620123594U CN2935699Y CN 2935699 Y CN2935699 Y CN 2935699Y CN 200620123594 CN200620123594 CN 200620123594 CN 200620123594 U CN200620123594 U CN 200620123594U CN 2935699 Y CN2935699 Y CN 2935699Y
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Abstract
The utility model discloses a portable AC and DC two-use frequency-changing microwave oven; the volume is small; the invention supports three electricity-using methods of the power supply including the AC power supply, the DC large current, the DC small current; and the invention is provided with a frequency-changing functional module to stabilize the output power. The microwave oven includes: a control board, a power board, a high-frequency voltage-multiplying rectification board, a magnetic control tube; after the high-frequency voltage-multiplying rectification board makes the high-frequency high-voltage current which is from the power board perform the rectifying, voltage-multiplying and filtering process, the high voltage is produced to push the magnetic control tube to generate the microwave as to heat the food. The utility model provides a frequency-changing microwave oven which is light, small and portable; the applicable electricity-using conditions are wide; the invention is especially suitable for use when out-going.
Description
Technical field
The utility model relates to variable frequency microwave stove a kind of AC/DC, portable belongs to the microwave oven technical field.
Background technology
Microwave oven is a kind ofly to convert electric energy to that microwave electromagnetic energy heats or the household electrical appliance of cooking food.Microwave irradiation can make the hydrone in the food polarize repeatedly with high frequency to food, and hydrone constantly rubs with other molecules of food in the process of polarization repeatedly, thereby food temperature is raise fast.Microwave oven has utilized such principle that food is heated, and uses widely with its convenient, fast having obtained.
People in for a long time to the use of microwave ovens process, constantly perfect the technology of microwave oven.In Chinese utility model patent ZL200420102032.4, a kind of microwave oven of power-adjustable is provided, can make food be in the even firepower heated condition of continuous appropriateness all the time.Such microwave oven is as the microwave oven that great majority use at present, the input of use AC power, the voltage doubling rectifing circuit that is made of Industrial Frequency Transformer and high-voltage capacitor, high-voltage diode produces microwave with heat food for magnetron provides the operating voltage of its requirement.Such microwave oven has inefficiency, and volume weight is big, is not easy to carry, and can't wait the shortcomings such as the following use of environment of no alternating current condition out of doors.People need a kind ofly all can use under interchange, DC condition at present, and the light little portable variable frequency microwave stove of figure, are convenient for people to use under special conditions of contract.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of applicable to power of alterating and direct current, and the light little portable variable frequency microwave stove of volume.
The purpose of this utility model is achieved by following technical proposals.
Portable AC/DC variable frequency microwave stove comprises: control board, power amplifier board, high frequency voltage multiplying rectifier plate, magnetron; Described high frequency voltage multiplying rectifier plate will produce the described magnetron of pushed at high pressure and produce microwave from after the high-frequency high-voltage current rectification of power amplifier board, multiplication of voltage, the filtering; It is characterized in that:
Described power amplifier board comprises: sampled signal output module, DC power high frequency module, high frequency high voltage transformer, current feedback signal module, change-over circuit;
Described power amplifier board input is input as the DC low current power supply; The DC low current power supply is divided into three the tunnel: output to described control board, output to control board, be high frequency high voltage transformer power supply through described change-over circuit through described sampled signal output module; Described high frequency high voltage transformer output signal outputs to control board through the current feedback signal module; Described control board produces the pulse modulation driving signal according to the signal from sampled signal output module and current feedback signal module, and the pulse modulation driving signal is exported to change-over circuit; The pulse modulation driving signal sends the high-frequency high-voltage current that produces to high frequency voltage multiplying rectifier plate through described change-over circuit, DC power high frequency module, high frequency high voltage transformer by high frequency high voltage transformer.
In addition, the power amplifier board input also comprises AC power supplies input and the big current input terminal of DC, imports AC power supplies and DC high-current supply respectively; Described AC power supplies input is connected with control board respectively with the big current input terminal of DC; Power amplifier board also is provided with: AC rectifier filter, AC power high frequency modules A C power high frequency module and DC power high frequency module are parallel between change-over circuit and the high frequency high voltage transformer;
Connect the AC rectifier filter behind the described AC power supplies input; AC power supplies is sent to sampled signal output module and high frequency high voltage transformer respectively through the AC rectifier filter; Described sampled signal output module output is connected with change-over circuit with control board respectively;
Described DC high-current supply is described high frequency high voltage transformer power supply through change-over circuit; Control board produces the pulse modulation driving signal according to described DC high-current supply with from the signal of current feedback signal module, and the pulse modulation driving signal is exported to change-over circuit;
Described change-over circuit is a commutation circuit, according to the signal that judges whether from the sampled signal output module, selects output to be connected with AC power high frequency module or DC power high frequency module.
Described DC low current power supply is the DC power supply of electric current less than 15A; Described DC high-current supply is the DC power supply of electric current greater than 15A.
Described microwave oven also is provided with the computer plate; The computer plate is connected with control board.
Described computer plate and control board are respectively equipped with the first gate control switch and the second gate control switch.
The inner bag volume of described microwave oven is 7L to 12L.
The utility model compared with prior art has following beneficial effect:
1. the inner bag volume of microwave oven is 7L to 12L, makes microwave oven gently urinate in carrying;
2. microwave oven provides AC power supplies, the big electric current of DC, three kinds of power supply power modes of the little electric current of DC, makes microwave oven be applicable to more electricity consumption conditions, is particularly suitable for using when going out;
3. microwave oven is provided with the module of variable frequency adjustment power, makes microwave oven can both stablize power output under alternating current-direct current electricity consumption condition, with even firepower heat food.
Description of drawings
Fig. 1 is the schematic diagram of alternating current-direct current variable frequency microwave stove;
Fig. 2 is an alternating current-direct current variable frequency microwave stove power amplifier board circuit diagram;
Fig. 3 is an alternating current-direct current variable frequency microwave stove control board circuit diagram;
Fig. 4 is an alternating current-direct current variable frequency microwave stove high frequency voltage multiplying rectifier plate circuit diagram.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the schematic diagram of alternating current-direct current variable frequency microwave stove.Alternating current-direct current variable frequency microwave stove comprises: computer plate, control board, power amplifier board, high frequency voltage multiplying rectifier plate, magnetron, blower fan.
Described power amplifier board comprises: AC rectifier filter 11, sampled signal output module 12, change-over circuit 13, AC power high frequency module 14, DC power high frequency module 15, high frequency high voltage transformer 16, current feedback signal module 17.Power supply is imported by the power amplifier board input, the input power supply is any in AC power supplies, the big electric current of DC, three kinds of power mode of the little electric current of DC, respectively corresponding three different inputs, whether DC high-current supply input 22 and DC low current power supply input 23 is mainly divided greater than 15A according to the input source current, and described DC low current power supply input 23 mainly can be worked under the DC low current Power Supplies Condition as automobile cigarette lighter in order to satisfy microwave oven.
When power supply was AC power supplies, AC power supplies was by AC power supplies input 21 input power plates.AC power supplies is sent to high frequency high voltage transformer 16 by AC rectifier filter 11 with the electric current behind rectifying and wave-filtering, for high frequency high voltage transformer 16 electricity consumption work.Simultaneously, AC rectifier filter 11 also goes out power source diverter a part after treatment respectively as back level power supply and AC sampled signal, and back level power supply is control board and the power supply of computer plate by power interface 25, and the AC sampled signal is sent to sampled signal output module 12.The AC sampled signal is sent to control board and change-over circuit 13 respectively by sampled signal output module 12.
When power supply was the big electric current of DC, the DC high-current supply was by DC high-current supply input 22 input power plates.The DC high-current supply directly is sent to change-over circuit 13.Simultaneously, the DC high-current supply is control board and the power supply of computer plate as the back level power supply by power interface 25 also.
When power supply was the little electric current of DC, the DC low current power supply was by DC low current power supply input 23 input power plates.The DC low current power supply is control board and the power supply of computer plate as the back level power supply by power interface 25.Simultaneously, the DC low current power supply is sent to change-over circuit 13 and sampled signal output module 12 respectively.The power supply signal that is sent to sampled signal output module 12 is sent to control board as the little current sampling signal of DC by sampled signal output module 12.
Change-over circuit 13 is mainly a commutation circuit, and this circuit receives the pulse modulation driving signal from control board, and selects to send this signal to late-class circuit.Change-over circuit 13 judges that by having judged whether the input of AC sampled signal the input power supply is AC power or DC power supply.When the input of AC sampled signal was the AC power input, change-over circuit 13 was sent to AC power high frequency module 14 with the pulse modulation driving signal that receives; When not having the input of AC sampled signal to be the DC power supply input, change-over circuit 13 is sent to DC power high frequency module 15 with the pulse modulation driving signal that receives, and will receive DC power supply (DC high-current supply or DC low current power supply) simultaneously and be sent to high frequency high voltage transformer 16 and be high frequency high voltage transformer 16 power supplies.
AC power high frequency module 14 or DC power high frequency module 15 promote high frequency high voltage transformer 16 work, produce high-frequency high-voltage current, and this high-frequency high-voltage current is sent to high frequency voltage multiplying rectifier plate.Be sent to the high-frequency high-voltage current of high frequency voltage multiplying rectifier plate, through high frequency voltage multiplying rectifier plate, the magnetron work that rectification, multiplication of voltage, filtering generation high pressure go to promote thereafter and connect produces microwave heating food.Because microwave oven is subjected to the influence of microwave oven internal burden factors such as (as heated objects in the microwave oven), the high-frequency high-voltage current instability that can cause high frequency high voltage transformer 16 to produce.For solving such influence, microwave oven also is provided with current feedback signal module 17.Flow through current feedback signal module 17 of high-frequency high-voltage is handled, and produces current feedback signal, and current feedback signal is sent to control board.Control board is adjusted according to current feedback signal paired pulses modulation driving signal.
Control board is for reconciling the main modular of microwave oven power output.Control board is regulated the voltage of the comparison signal that contrasts with current feedback signal by little current sampling signal of AC sampled signal, DC or the big electric current power supply signal of DC from power amplifier board.Control board is reconciled the pulsewidth of pulse modulation driving signal by the contrast of current feedback signal and this comparison signal, and the pulse-width modulation driving signal is sent to power amplifier board, thereby reaches the purpose of regulating microwave power.Control board is subjected to coupled second gate control switch control, and the second gate control switch is subjected to the control of door for microwave oven, and the second gate control switch disconnects when door for microwave oven is opened, thereby stops control board work, to guarantee people's safe handling.Control board is also controlled two typhoon machines runnings the discharge pipe and the heating panel of microwave oven is dispelled the heat.
The computer plate is mainly controlled the microwave oven operating time.The computer plate produces control signal, and this signal is sent to control board, and the control control board produces the time of pulse modulation driving signal, thereby reaches the purpose that the controlled microwave furnaceman does the time.The computer plate is controlled by the first coupled gate control switch, and the same second gate control switch of the first gate control switch equally is subjected to the control of door for microwave oven, and the first gate control switch disconnects when door for microwave oven is opened, and the computer plate quits work.
Fig. 2 is an alternating current-direct current variable frequency microwave stove power amplifier board circuit diagram.Power amplifier board comprises: AC rectifier filter 11, sampled signal output module 12, change-over circuit 13, AC power high frequency module 14, DC power high frequency module 15, high frequency high voltage transformer 16, current feedback signal module 17.Power amplifier board also is provided with some interfaces that are connected with other parts, comprising: AC power supplies input 21, DC high-current supply input 22, DC low current power supply input 23, sampled signal interface 24, power interface 25, pulse modulation driving signal interface 26, high-frequency high-voltage current output interface 27, current feedback signal interface 28.
When power supply was AC power supplies, AC power supplies was by AC power supplies input 21 input power plates.AC power supplies is through D22, C2, C3 rectifying and wave-filtering, outputs to high frequency high voltage transformer 16 (T1) by the tripod of D22, is high frequency high voltage transformer 16 (T1) power supply.Another road produces back level power supply and AC sampled signal from transformer T2 output stage behind D1-D4, C4, C6 rectifying and wave-filtering.This back level power supply provides working power by power interface 25 for control board, computer plate by D11.This AC sampled signal outputs to control board by the D14 of sampled signal output module 12 by sampled signal interface 24 respectively; D21 by change-over circuit 13 is sent to change-over circuit 13.
When power supply was the big electric current of DC, the DC high-current supply was by DC high-current supply input 22 input power plates.The DC high-current supply directly is sent to change-over circuit 13, and provides working power by power output interface 25 for control board, computer plate by the D10 of change-over circuit 13.
When power supply was the little electric current of DC, the DC low current power supply was by DC low current power supply input 23 input power plates.The DC low current power supply directly is sent to change-over circuit 13, and provides working power by power interface 25 for control board, computer plate by the D10 of change-over circuit 13.Simultaneously, the DC low current power supply is also taken a sample as the little current sampling signal of DC by the D15 of sampled signal output module 12, outputs to control board by sampled signal interface 24.
Change-over circuit 13 receives pulse modulation driving signal from control board by pulse modulation driving signal interface 26, and selects its latter linked circuit as a commutation circuit.The AC sampled signal connects AC power high frequency module 14 or DC power high frequency module 15 through D21, R12, R11, C8, Q14 control transformation circuit 13 automatic transfer switch K1, K2, K3 with level after selecting.When power supply was AC power, change-over circuit 13 output pulse modulation driving signals went to promote AC power high frequency module 14, and signal removes to promote high frequency high voltage transformer 16 (T1) again through Q1, Q2, Q5, Q6, Q7, the Q8 of AC power high frequency module 14.When power supply was DC power supply, change-over circuit 13 output pulse modulation driving signals went to promote DC power high frequency module 15, and signal removes to promote high frequency high voltage transformer 16 (T1) again through Q9, Q10, Q11, the Q12 of DC power high frequency module 15.High frequency high voltage transformer 16 (T1) produces high-frequency high-voltage current under the promotion of driving signal, and this high-frequency high-voltage current is sent to high frequency voltage multiplying rectifier plate by high-frequency high-voltage current output interface 27.Simultaneously, high-frequency high-voltage current also produces current feedback signal by R8, the D20 of current feedback signal module 17, and sends this feedback signal to control board by current feedback signal interface 28.
Fig. 3 is an alternating current-direct current variable frequency microwave stove control board circuit diagram.Control board mainly is made up of PWM controller IC 3525 and peripheral circuit thereof.Control board is provided with some interfaces that are connected with other parts equally, comprising: power interface 25, pulse modulation driving signal interface 26, sampled signal interface 24, current feedback signal interface 28, computer plate power interface 29, door switch 210, computer plate control interface 211, blower fan output 212.
PWM controller IC 3525 in the control board, 5,6,7 pin are formed a frequency oscillator, regulate the output frequency of IC3525 by external resistance R 37, R38, R39 and capacitor C 28.Between inner 1 pin of IC3525,2 pin are voltage comparators, by relatively changing the pulsewidth of its 11 pin, 14 pin output pulse modulation driving signal.Current feedback signal is arrived 1 pin of IC3525 through D20.R44 by 28 inputs of current feedback signal interface.Then regulate by the sampled signal of sampled signal interface 24 input IC3525 the output of 16 pin reference voltage and will regulate after signal import 2 pin with the comparison of 1 pin signal.As long as 1 pin voltage is when being higher than 2 pin, narrows down from the pulsewidth of the pulse modulation driving signal of its 11 pin, 14 pin, thereby the power of microwave oven is descended, on the contrary, when 2 pin voltages were higher than 1 pin, the pulsewidth of the pulse modulation driving signal of 11 pin, 14 pin broadened, and microwave power rises.When there not being sampled signal input is power supply when being the big electric current of DC, and power supply is by power interface 25 inputs, and the A1 adjustable resistance is regulated in the Q23 conducting, and the voltage of 2 pin also changes thereupon, thus regulating impulse modulation driving signal.When the little current sampling signal of DC arrives is power supply when being the little electric current of DC, and power supply is by power interface 25 inputs, and Q21 begins conducting, and Q23 is conducting no longer, regulates the A2 adjustable resistance, and 2 pin voltages also change thereupon, thus regulating impulse modulation driving signal.When the AC sampled signal arrives is power supply when being AC power supplies, and power supply is by power interface 25 inputs, the Q20 conducting, and also not conducting of Q23, it is adjustable to regulate A3, thus regulating impulse modulation driving signal.Pulse modulation driving signal by IC352511 pin, the output of 14 pin is sent to power amplifier board by pulse modulation driving signal interface 26.Simultaneously, the operating time of control board also is subjected to by the computer plate control signal of computer plate control interface 211 inputs and the control of the second gate control switch that is connected with door switch 210.
Fig. 4 is an alternating current-direct current variable frequency microwave stove high frequency voltage multiplying rectifier plate circuit diagram.High frequency voltage multiplying rectifier plate circuit is made up of C30, C31, D28, D29, D30, and high frequency voltage multiplying rectifier plate circuit will produce high pressure from high-frequency high-voltage current rectification, multiplication of voltage, the filtering of power amplifier board and remove to promote magnetron work generation microwave heating food.
According to technique scheme; art technology people without prejudice to the utility model under the technical creative essence prerequisite of microwave oven; make as changing microwave oven volume size making it light more urine and take and wait the design improvement of using always, all should be considered as within the utility model protection range.
Claims (6)
1. portable AC/DC variable frequency microwave stove comprises: control board, power amplifier board, high frequency voltage multiplying rectifier plate, magnetron; Described high frequency voltage multiplying rectifier plate will produce the described magnetron of pushed at high pressure and produce microwave from after the high-frequency high-voltage current rectification of power amplifier board, multiplication of voltage, the filtering; It is characterized in that:
Described power amplifier board comprises: sampled signal output module, DC power high frequency module, high frequency high voltage transformer, current feedback signal module, change-over circuit;
Described power amplifier board input is input as the DC low current power supply; Described DC low current power supply is divided into three the tunnel: output to described control board, output to control board, be high frequency high voltage transformer power supply through described change-over circuit through described sampled signal output module; Described high frequency high voltage transformer output signal outputs to control board through the current feedback signal module; Described control board produces the pulse modulation driving signal according to the signal from sampled signal output module and current feedback signal module, and described pulse modulation driving signal is exported to described change-over circuit; Described pulse modulation driving signal is through described change-over circuit, DC power high frequency module, high frequency high voltage transformer, and the described high-frequency high-voltage current that will be produced by high frequency high voltage transformer sends high frequency voltage multiplying rectifier plate to.
2. portable according to claim 1 AC/DC variable frequency microwave stove is characterized in that:
Described power amplifier board input also comprises AC power supplies input and the big current input terminal of DC, imports AC power supplies and DC high-current supply respectively; Described AC power supplies input is connected with control board respectively with the big current input terminal of DC; Described power amplifier board also is provided with: AC rectifier filter, AC power high frequency module; Described AC power high frequency module and DC power high frequency module are parallel between change-over circuit and the high frequency high voltage transformer;
Connect described AC rectifier filter behind the described AC power supplies input; Described AC power supplies is sent to described sampled signal output module and high frequency high voltage transformer respectively through the AC rectifier filter; Described sampled signal output module output is connected with change-over circuit with described control board respectively;
Described DC high-current supply is described high frequency high voltage transformer power supply through change-over circuit; Described control board produces the pulse modulation driving signal according to described DC high-current supply with from the signal of current feedback signal module, and described pulse modulation driving signal is exported to described change-over circuit;
Described change-over circuit is a commutation circuit, according to the signal that judges whether from the sampled signal output module, selects output to be connected with AC power high frequency module or DC power high frequency module.
3. as portable AC/DC variable frequency microwave stove as described in the claim 2, it is characterized in that: described DC low current power supply is the DC power supply of electric current less than 15A; Described DC high-current supply is the DC power supply of electric current greater than 15A.
4. portable as claimed in claim 1 or 2 AC/DC variable frequency microwave stove, it is characterized in that: described microwave oven also is provided with the computer plate; Described computer plate is connected with control board.
5. as portable AC/DC variable frequency microwave stove as described in the claim 4, it is characterized in that: described computer plate and control board are respectively equipped with the first gate control switch and the second gate control switch.
6. portable as claimed in claim 1 or 2 AC/DC variable frequency microwave stove is characterized in that: the inner bag volume of described microwave oven is 7L to 12L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620123594 CN2935699Y (en) | 2006-08-08 | 2006-08-08 | Portable AC-DC dual-purpose frequency changing microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620123594 CN2935699Y (en) | 2006-08-08 | 2006-08-08 | Portable AC-DC dual-purpose frequency changing microwave oven |
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| Publication Number | Publication Date |
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| CN2935699Y true CN2935699Y (en) | 2007-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620123594 Expired - Lifetime CN2935699Y (en) | 2006-08-08 | 2006-08-08 | Portable AC-DC dual-purpose frequency changing microwave oven |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428931A (en) * | 2012-05-18 | 2013-12-04 | 上海松下微波炉有限公司 | Control circuit of microwave oven |
| CN106413164A (en) * | 2016-09-07 | 2017-02-15 | 广东美的厨房电器制造有限公司 | Control method, control equipment and control system for microwave oven, and microwave oven |
| US10820382B2 (en) | 2016-01-28 | 2020-10-27 | Whirlpool Corporation | Method and apparatus for delivering radio frequency electromagnetic energy to cook foodstuff |
| US10827570B2 (en) | 2016-02-15 | 2020-11-03 | Whirlpool Corporation | Method and apparatus for delivering radio frequency electromagnetic energy to cook foodstuff |
| CN114401564A (en) * | 2022-01-12 | 2022-04-26 | 广东美的厨房电器制造有限公司 | Microwave oven and vehicle |
-
2006
- 2006-08-08 CN CN 200620123594 patent/CN2935699Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428931A (en) * | 2012-05-18 | 2013-12-04 | 上海松下微波炉有限公司 | Control circuit of microwave oven |
| CN103428931B (en) * | 2012-05-18 | 2016-12-21 | 上海松下微波炉有限公司 | The control circuit of microwave oven |
| US10820382B2 (en) | 2016-01-28 | 2020-10-27 | Whirlpool Corporation | Method and apparatus for delivering radio frequency electromagnetic energy to cook foodstuff |
| US10827570B2 (en) | 2016-02-15 | 2020-11-03 | Whirlpool Corporation | Method and apparatus for delivering radio frequency electromagnetic energy to cook foodstuff |
| CN106413164A (en) * | 2016-09-07 | 2017-02-15 | 广东美的厨房电器制造有限公司 | Control method, control equipment and control system for microwave oven, and microwave oven |
| CN114401564A (en) * | 2022-01-12 | 2022-04-26 | 广东美的厨房电器制造有限公司 | Microwave oven and vehicle |
| CN114401564B (en) * | 2022-01-12 | 2024-05-24 | 广东美的厨房电器制造有限公司 | Microwave oven and vehicle |
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Legal Events
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| C14 | Grant of patent or utility model | ||
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| ASS | Succession or assignment of patent right |
Owner name: AVIC INTERNATIONAL BEIJING CO., LTD. Free format text: FORMER OWNER: TEEMU FRANK Effective date: 20101229 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 28803, NORTH CAROLINA, UNITED STATES TO: 100176 BUILDING 6, NO.16, HONGDA NORTH ROAD, BEIJING ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20101229 Address after: 100176, building 16, building 6, Hongda North Road, Beijing economic and Technological Development Zone, Beijing Co-patentee after: Yuyao Huaxingmeile Electrical Appliance Factory Patentee after: AVIC International Beijing Company Limited Address before: North Carolina, Ashe, Wiley, Volvo Road, 28803 Co-patentee before: Yuyao Huaxingmeile Electrical Appliance Factory Patentee before: Timm Frank |
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| CX01 | Expiry of patent term |
Granted publication date: 20070815 |
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| EXPY | Termination of patent right or utility model |