CN101013326A - Method for controlling speed regulation of cooling fan of electromagnetic oven - Google Patents
Method for controlling speed regulation of cooling fan of electromagnetic oven Download PDFInfo
- Publication number
- CN101013326A CN101013326A CNA2007100134114A CN200710013411A CN101013326A CN 101013326 A CN101013326 A CN 101013326A CN A2007100134114 A CNA2007100134114 A CN A2007100134114A CN 200710013411 A CN200710013411 A CN 200710013411A CN 101013326 A CN101013326 A CN 101013326A
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- cooling fan
- fan
- control
- electromagnetic oven
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- 238000001816 cooling Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000033228 biological regulation Effects 0.000 title claims description 13
- 230000006698 induction Effects 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention relates to appliances equipments, particularly induction cookers cooling fan speed control method, belonging to the home appliance control technology field, designed to provide a speed control method for the energy saving, environmental protection, life-long induction cookers cooling fan. It is characterized by that according to the induction cooker working state and load size, the CPU outputs at least two cooling fan drive circuit control signals, and by changing output voltage of the cooling fan drive circuit, to control the cooling fan speed. The invention has the advantages of reliable control and simple structure, and it can effectively reduce the power consumption and noise of cooling fan, and extend the usage life of cooling fan. It is suitable for all kinds of home appliances, in particular the replacement of the induction cookers cooling fan.
Description
Technical field
The present invention relates to the method for controlling speed regulation of the cooling fan of domestic electric appliance, particularly electromagnetic oven, belong to household electrical appliance control technology field.
Background technology
The radiator fan of existing electromagnetic oven is to adopt constant supply voltage, and load size temperature height no matter, the rotating speed of fan remain to be stablized constantly, i.e. power consumption can produce bigger noise again, has also shortened the serviceable life of fan.
Summary of the invention
The present invention is directed to the deficiency of prior art, purpose is to provide a kind of energy-conserving and environment-protective, the method for controlling speed regulation of the cooling fan of electromagnetic oven of long service life.
Principle of the present invention be by CPU according to the payload situation, fan voltage is regulated, make fan when the electromagnetic oven internal temperature is low, reduce rotating speed, when the electromagnetic oven internal temperature rise is high, improve rotating speed.But can effectively dispel the heat and saves energy, reduce the noise pollution that fan runs up and produces, prolong the serviceable life of fan simultaneously.
The rotating speed of fan can just be regulated by the voltage that is applied to the fan two ends.The voltage at fan two ends can be controlled the base current of fans drive triode by the control signal of CPU output, thereby regulates the voltage height that is applied to the fan two ends.
CPU sends at least two grades of voltage signals according to the situation of working load, regulates the base current of triode, thereby changes the voltage output value that is applied to the fan two ends.
When electromagnetic oven is in holding state or miniwatt output, after CPU handles by in house software, the signal of output control transistor base electric current, thus reduce the voltage that is applied to the fan two ends, realize the purpose that reduces rotating speed, reduces noise; Otherwise, when electromagnetic oven is in high-power output services state, the strong signal of CPU output control transistor base electric current, the electromagnetic oven fan drive circuit can improve the rotating speed of fan.
In sum, a kind of method for controlling speed regulation of cooling fan of electromagnetic oven, it is characterized in that by CPU according to induction cooker working state and payload, export the control voltage of at least two grades of cooling fan driving circuits, the output voltage of the driving circuit by changing cooling fan, the control speed of cooling fan.
The formation of its hardware comprises CPU, drives triode and auxiliary circuit.
According to said method, a kind of arrangements for speed regulation of cooling fan of electromagnetic oven, driving circuit by cooling fan, cooling fan is constituted, it is characterized in that microprocessor connects the control end of the driving circuit of cooling fan, the output terminal of driving circuit and the coil of cooling fan link, and constitute the cooling fan operating voltage and adjust control circuit.
The driving circuit of cooling fan is that the transistor output circuit of cooling fan constitutes by load.
The transistor output circuit is made up of two triode dc switch amplifying circuits that are connected in parallel, the control magnitude of voltage difference of its input end, the internal resistance difference of output terminal.
During work, microprocessor sends the square wave of different duty according to working condition and load variations, and the output voltage of control transistor output circuit varies with temperature the rotating speed of fan electromotor and changes.
The present invention has the simple advantage of control reliable structure, can effectively reduce the energy consumption and the noise of cooling fan, prolongs the serviceable life of cooling fan.Use the particularly update of cooling fan of electromagnetic oven in the suitable various domestic electric appliances.
Below in conjunction with accompanying drawing, invention is described in further detail:
Description of drawings
Fig. 1 is the circuit theory diagrams of an embodiment of fan speed change gear of electromagnetic oven of the present invention;
Fig. 2 is the circuit theory diagrams of another embodiment of fan speed change gear of electromagnetic oven of the present invention;
Fig. 3 is the circuit theory diagrams for the 3rd embodiment of fan speed change gear of electromagnetic oven of the present invention.
Embodiment
In sum, a kind of method for controlling speed regulation of cooling fan of electromagnetic oven, it is characterized in that by CPU according to induction cooker working state and payload, export the control signal of at least two grades of cooling fan driving circuits, the output voltage of the driving circuit by changing cooling fan, the control speed of cooling fan.
The method for controlling speed regulation of described cooling fan of electromagnetic oven, the output voltage that it is characterized in that the driving circuit of fan is a base current of controlling triode Q1, Q2 by the control signal that CPU output changes, regulate the output voltage amplitude of the driving circuit of cooling fan, reach the purpose of control rotation speed of the fan.
The method for controlling speed regulation of described cooling fan of electromagnetic oven, the output loop that it is characterized in that the cooling fan driving circuit are by short circuit or seal in resistance R 1 and carry out voltage and just control.
A kind of arrangements for speed regulation of cooling fan of electromagnetic oven, driving circuit by cooling fan, cooling fan is constituted, it is characterized in that microprocessor connects the control end of the driving circuit of cooling fan, the output terminal of driving circuit and the coil of cooling fan link, and constitute the cooling fan operating voltage and adjust control circuit.
The driving circuit of cooling fan is that transistor Q1, the Q2 output circuit of cooling fan constitutes by load.
The transistor output circuit is made up of two triode dc switch amplifying circuits that are connected in parallel, the control magnitude of voltage difference of its input end, the internal resistance difference of output terminal.
The control magnitude of voltage of its input end is not both and adopts the method that increases the below-center offset electric resistance partial pressure to realize.
The internal resistance different mining of output terminal realizes with collector series load method of resistor.
Fig. 1 embodiment circuit structure:
Fan control circuitry is made up of the control signal of Q1, Q2, R1, R2, R3, R4, R5, C1 and CPU (single-chip microcomputer) output, the fan control output of CPU and R4, C1 form control section, Q2 and R2, R3 form fan drive part at full speed, and Q1 and R1, R5 form fan driven at low speed part.Wherein, 2 pin of fan DCFAN link to each other with direct supply Vcc, 1 pin of fan DCFAN links to each other with the end of the collector of transistor Q1 and R1, the base stage of transistor Q1 links to each other with the fan control output terminal of CPU by the control section of resistance R 5 and circuit, and the base stage of transistor Q2 links to each other with the fan control output terminal of CPU by the control section of resistance R 3 and circuit.
Fig. 1 circuit working principle:
When fan requires low speed, single-chip microcomputer fan control end is exported a square-wave signal (4KHZ, 5V), become DC voltage through the RC circuit filtering, the base current of triode is provided, making Q1 saturation conduction and Q2 be in by state (is Uce1≤0.3v), Vcc forms the closed-loop path by DCFAN, R1, Q1, wherein R1 makes the operating voltage of DCFAN be lower than Vcc with the form of dividing potential drop, thereby realizes the purpose of decompression speed; When fan required high speed, the fan output control terminal was exported the constant potential of 5V, and the base current of triode is provided, making the Q2 saturation conduction (is Uce2≤0.3v), Vcc forms the closed-loop path by DCFAN, Q2, and this moment, the operating voltage of DCFAN approached power source voltage Vcc, and rotation speed of the fan is the fastest.When the fan stall, fan output control terminal output voltage is 0, and Q1, Q2 are all by (being Uce1=VCC, Uce2=VCC).
Embodiment 2,3 is referring to Fig. 2 and Fig. 3, and structural principle is identical with Fig. 1 embodiment.
Embodiment 2 has adopted serial connection to go into the voltage stabilizing diode of transistor Q2 base loop, has improved the control voltage of transistor Q2 base stage.Embodiment 3 adopts transistor Q1 saturation voltage drop, has improved the control input voltage of transistor Q2 base stage.
The foregoing description as can be seen, the engineering technical personnel of this area can simplify concrete control circuit, modification, replacement, but its control principle is identical.
Claims (3)
1, a kind of method for controlling speed regulation of cooling fan of electromagnetic oven, it is characterized in that by CPU according to induction cooker working state and payload, export the control signal of at least two grades of cooling fan driving circuits, the output voltage of the driving circuit by changing cooling fan, control speed of cooling fan.
2, the method for controlling speed regulation of cooling fan of electromagnetic oven according to claim 1, the output voltage that it is characterized in that the driving circuit of fan is a base current of controlling triode (Q1, Q2) by the control signal that CPU output changes, regulate the output voltage amplitude of the driving circuit of cooling fan, reach the control rotation speed of the fan.
3, the method for controlling speed regulation of cooling fan of electromagnetic oven according to claim 1, the output loop that it is characterized in that the cooling fan driving circuit are by short circuit or seal in resistance (R1) and carry out voltage and just control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100134114A CN100498627C (en) | 2007-01-30 | 2007-01-30 | Method for controlling speed regulation of cooling fan of electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100134114A CN100498627C (en) | 2007-01-30 | 2007-01-30 | Method for controlling speed regulation of cooling fan of electromagnetic oven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101013326A true CN101013326A (en) | 2007-08-08 |
| CN100498627C CN100498627C (en) | 2009-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100134114A Active CN100498627C (en) | 2007-01-30 | 2007-01-30 | Method for controlling speed regulation of cooling fan of electromagnetic oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100498627C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562635A (en) * | 2010-12-24 | 2012-07-11 | 鸿富锦精密工业（深圳）有限公司 | Fan rotational speed control circuit |
| CN103857084A (en) * | 2012-12-06 | 2014-06-11 | 美的集团股份有限公司 | Induction cooker control circuit and control method |
| WO2014177177A1 (en) | 2013-04-29 | 2014-11-06 | Arcelik Anonim Sirketi | Induction cooker fan pwm control for noise reduction |
| CN103908098B (en) * | 2014-03-25 | 2017-04-05 | 上海乔马电子科技有限公司 | A kind of heating refrigeration control system and method for seat |
| CN107066005A (en) * | 2017-04-18 | 2017-08-18 | 深圳市菲菱科思通信技术股份有限公司 | A kind of power switch and voltage regulating and controlling circuit |
| EP3644071A4 (en) * | 2017-07-26 | 2020-07-22 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Sampling current processing circuit, power detection circuit and electromagnetic cooking device |
-
2007
- 2007-01-30 CN CNB2007100134114A patent/CN100498627C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562635A (en) * | 2010-12-24 | 2012-07-11 | 鸿富锦精密工业（深圳）有限公司 | Fan rotational speed control circuit |
| CN103857084A (en) * | 2012-12-06 | 2014-06-11 | 美的集团股份有限公司 | Induction cooker control circuit and control method |
| WO2014177177A1 (en) | 2013-04-29 | 2014-11-06 | Arcelik Anonim Sirketi | Induction cooker fan pwm control for noise reduction |
| CN103908098B (en) * | 2014-03-25 | 2017-04-05 | 上海乔马电子科技有限公司 | A kind of heating refrigeration control system and method for seat |
| CN107066005A (en) * | 2017-04-18 | 2017-08-18 | 深圳市菲菱科思通信技术股份有限公司 | A kind of power switch and voltage regulating and controlling circuit |
| EP3644071A4 (en) * | 2017-07-26 | 2020-07-22 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Sampling current processing circuit, power detection circuit and electromagnetic cooking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100498627C (en) | 2009-06-10 |
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Address after: No. 999, Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee after: JOYOUNG Co.,Ltd. Country or region after: China Address before: Xinsha Road, Huaiyin District of Ji'nan city of Shandong Province, No. 12 250118 Patentee before: JOYOUNG Co.,Ltd. Country or region before: China |