CN201087795Y - Speed control device of electromagnetic stove cooling fan - Google Patents
Speed control device of electromagnetic stove cooling fan Download PDFInfo
- Publication number
- CN201087795Y CN201087795Y CNU2007200180692U CN200720018069U CN201087795Y CN 201087795 Y CN201087795 Y CN 201087795Y CN U2007200180692 U CNU2007200180692 U CN U2007200180692U CN 200720018069 U CN200720018069 U CN 200720018069U CN 201087795 Y CN201087795 Y CN 201087795Y
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- cooling fan
- fan
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- drive circuit
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- 238000001816 cooling Methods 0.000 title claims abstract description 50
- 230000033228 biological regulation Effects 0.000 claims description 12
- 238000005065 mining Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 230000006698 induction Effects 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 238000010411 cooking Methods 0.000 abstract 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000008929 regeneration Effects 0.000 abstract 1
- 238000011069 regeneration method Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 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
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to a household electrical appliance, in particular to a speed regulating device of an induction cooker, which belongs to the technical field of the household electrical appliance control. The utility model aims at providing a speed regulating control method and a speed regulating device of an induction cooker cooling fan which has the advantages of energy conservation and environmental protection and long service life. The utility model is characterized in that two control signals of a drive circuit of the cooking fan is outputted by a CPU according to the working situation of the induction cooker and the magnitude of the load, and the rotation speed of the cooling fan is controlled through changing the output voltage of the drive circuit of the cooling fan. The utility model has the advantages of reliable control and simple structure, and can effectively reduce consumption and noise of the cooling fan and prolong the service life of the cooking fan. The utility model is suitable for being used in various household electrical appliances, especially for the regeneration of the cooling fan of the induction cooker.
Description
Technical field
The utility model relates to the arrangements for speed regulation of the cooling fan of domestic electric appliance, particularly electromagnetic oven, belongs 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 service life of fan.
Summary of the invention
The utility model is at the deficiency of prior art, and purpose is to provide a kind of energy-conserving and environment-protective, the arrangements for speed regulation of the cooling fan of electromagnetic oven of long service life.
Principle of the present utility model 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 service 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 live 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 small-power 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 drive circuits, the output voltage of the drive 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, drive circuit by cooling fan, cooling fan is constituted, it is characterized in that microprocessor connects the control end of the drive circuit of cooling fan, the output of drive circuit and the coil of cooling fan link, and constitute the cooling fan operating voltage and adjust control circuit.
The drive 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, the internal resistance difference of output.
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 utlity model has the simple advantage of control reliable structure, can effectively reduce the energy consumption and the noise of cooling fan, prolong the service 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, utility model is described in further detail:
Description of drawings
Fig. 1 is the circuit theory diagrams of an embodiment of fan speed change gear of the utility model electromagnetic oven;
Fig. 2 is the circuit theory diagrams of another embodiment of fan speed change gear of the utility model electromagnetic oven;
Fig. 3 is the circuit theory diagrams for the 3rd embodiment of fan speed change gear of the utility model electromagnetic oven.
The specific 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 drive circuits, the output voltage of the drive 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 drive 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 drive 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 drive 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, drive circuit by cooling fan, cooling fan is constituted, it is characterized in that microprocessor connects the control end of the drive circuit of cooling fan, the output of drive circuit and the coil of cooling fan link, and constitute the cooling fan operating voltage and adjust control circuit.
The drive 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, the internal resistance difference of output.
The control magnitude of voltage of its input 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 realizes with colelctor electrode 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 dc source Vcc, 1 pin of fan DCFAN links to each other with the end of the colelctor electrode of transistor Q1 and R1, the base stage of transistor Q1 links to each other with the fan control output 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 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 has adopted serial connection to go into the Zener 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 engineers and technicians of this area can simplify concrete control circuit, modification, replacement, but its control principle is identical.
Claims (3)
1. the arrangements for speed regulation of a cooling fan of electromagnetic oven, drive circuit by cooling fan, cooling fan is constituted, it is characterized in that microprocessor connects the control end of the drive circuit of cooling fan, the output of drive circuit and the coil of cooling fan link, and constitute the cooling fan operating voltage and adjust control circuit.
2. the arrangements for speed regulation of cooling fan of electromagnetic oven according to claim 1, the drive circuit that it is characterized in that cooling fan are that transistor (Q1, the Q2) output circuit of cooling fan constitutes by load.
3. the arrangements for speed regulation of cooling fan of electromagnetic oven according to claim 1 and 2, it is characterized in that 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, the internal resistance difference of output: the control magnitude of voltage of its input is not both to adopt increases below-center offset resistance (R2) bleeder circuit; The internal resistance different mining of output is used colelctor electrode series load resistor (R1) loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200180692U CN201087795Y (en) | 2007-01-30 | 2007-01-30 | Speed control device of electromagnetic stove cooling fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200180692U CN201087795Y (en) | 2007-01-30 | 2007-01-30 | Speed control device of electromagnetic stove cooling fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201087795Y true CN201087795Y (en) | 2008-07-16 |
Family
ID=39635386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200180692U Expired - Lifetime CN201087795Y (en) | 2007-01-30 | 2007-01-30 | Speed control device of electromagnetic stove cooling fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201087795Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658796A (en) * | 2016-12-26 | 2017-05-10 | 佛山市顺德区美的电热电器制造有限公司 | Voltage regulator circuit and voltage regulating method |
| CN107725451A (en) * | 2016-08-11 | 2018-02-23 | 佛山市顺德区美的电热电器制造有限公司 | Blower fan method for detecting abnormality, device and the electromagnetic heater of electromagnetic heater |
-
2007
- 2007-01-30 CN CNU2007200180692U patent/CN201087795Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725451A (en) * | 2016-08-11 | 2018-02-23 | 佛山市顺德区美的电热电器制造有限公司 | Blower fan method for detecting abnormality, device and the electromagnetic heater of electromagnetic heater |
| CN107725451B (en) * | 2016-08-11 | 2020-07-28 | 佛山市顺德区美的电热电器制造有限公司 | Fan abnormity detection method and device of electromagnetic heating device and electromagnetic heating device |
| CN106658796A (en) * | 2016-12-26 | 2017-05-10 | 佛山市顺德区美的电热电器制造有限公司 | Voltage regulator circuit and voltage regulating method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080716 |