CN205094291U - Infrared probe type dries by fire hand ware - Google Patents
Infrared probe type dries by fire hand ware Download PDFInfo
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- CN205094291U CN205094291U CN201520890215.5U CN201520890215U CN205094291U CN 205094291 U CN205094291 U CN 205094291U CN 201520890215 U CN201520890215 U CN 201520890215U CN 205094291 U CN205094291 U CN 205094291U
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Abstract
The utility model relates to an infrared probe type dries by fire hand ware, its characteristic includes: 220V alternating current power supply, 12V half -wave rectification constant voltage power supply, infrared probe circuit, the enlarged negative feedback circuit of reaching of infrared signal, voltage ratio reach level output circuit, electrical heating and fan drive circuit, infrared probe circuit in, the model that infrared probe IC1 chooseed for use is LN074B, the voltage ratio and the model chooseed for use of the operational amplifier IC2 in the level output circuit for CA3140. Infrared probe type dries by fire hand ware adopt infrared probe and amplify infrared probe received small signal, then the power drive element of use bidirectional thyristor as electrical heating and fan to be aided with that a small amount of ordinary components and parts have realized that infrared probe type dries by fire hand ware circuit structure is simple, dependable performance, low in cost and the convenient beneficial effect who popularizes.
Description
Technical field
The utility model belongs to electronics and infrared automatic control technology field, is about a kind of infrared probe type hand drier.
Background technology
Hand dryer is that it is divided into the types such as infrared-type automatic hand dryer, manual hand dryer for drying both hands or drying up the sanitary equipment electric heating appliance of both hands between a kind of bathroom.It such as to be mainly used between hotel, restaurant, scientific research institution, hospital, place of public amusement or domestic hygiene at the place.
The hand dryer market owning amount of hot type is maximum, usually its heating power is larger, many at more than 1000W, and power of fan is generally about 200W, the typical feature of this hand dryer is that wind-warm syndrome is very high, relies on the wind of higher temperature, and the globule evaporation on handle blows away, its advantage is that noise is little, and therefore it receives office building etc. and to need peace and quiet the favor in place.Through the test of kinds of schemes, infrared probe type hand drier described in the utility model adopts infrared probe and is amplified the small-signal that infrared probe receives, then use bidirectional triode thyristor as the power drive element of electrical heating and blower fan, and be aided with that a small amount of common components and parts achieve that infrared probe type hand drier circuit structure is simple, dependable performance, the cheap and convenient requirement popularized.
Below describe that infrared probe type hand drier described in the utility model is involved necessary in implementation process, guardian technique content in detail.
Utility model content
Goal of the invention and beneficial effect: infrared probe type hand drier described in the utility model adopts infrared probe and amplified the small-signal that infrared probe receives, then use bidirectional triode thyristor as the power drive element of electrical heating and blower fan, and be aided with a small amount of common components and parts and achieve that infrared probe type hand drier circuit structure is simple, dependable performance, the cheap and convenient beneficial effect popularized.
Circuit working principle: that the circuit of infrared probe type hand drier adopts is infrared probe IC1 (LN074B), after infrared probe IC1 receives the rpyroelectric infrared signal of people's pin release, 0.3 ~ 3Hz low frequency signal is converted into, the faint low frequency signal voltage comparator that input operational amplifier IC2 forms after NPN transistor VT1 amplifies by infrared probe IC1 internal circuit.
Potentiometer RP in operational amplifier IC2 peripheral circuit is to set reference voltage, and being used for regulating the sensitivity of infrared probe circuit, is exactly the detection range regulating infrared probe IC1.The 2nd pin reference voltage of operational amplifier IC2 is a little more than the 3rd pin input voltage of operational amplifier IC2 at ordinary times, operational amplifier IC2 output low level; When there being people's pin to enter the investigative range of infrared probe, infrared probe IC1 exports detecting voltage, amplifying through NPN transistor VT1 makes signal output voltage higher than the reference voltage of operational amplifier IC2 the 2nd pin, at this moment the 6th pin of operational amplifier IC2 exports high level, controls electrical heating and fan drive circuit with this high level.In order to make circuit working stablize, in NPN transistor VT1 amplifying circuit, adding electric capacity C2 form negative-feedback circuit.
Technical scheme: infrared probe type hand drier, it comprises 220V AC power, 12V halfwave rectifier voltage-stabilized power supply, infrared probe circuit, infrared signal amplification and negative-feedback circuit, voltage compare and electrical level output circuit, electrical heating and fan drive circuit, it is characterized in that:
In infrared probe circuit, the model of infrared probe IC1 selects LN074B, and black wrapped circuits ground GND, the output S of infrared probe IC1 of the red line connection circuit positive pole VCC of infrared probe IC1, infrared probe IC1 connect the positive pole of electrochemical capacitor C1;
Infrared signal is amplified and negative-feedback circuit: it is made up of electrochemical capacitor C1, NPN transistor VT1, resistance R1 and electric capacity C2, the base stage of NPN transistor VT1 connects the negative pole of electrochemical capacitor C1 and one end of electric capacity C2, one end of colelctor electrode connecting resistance R1 of NPN transistor VT1 and the other end of electric capacity C2, the emitter stage connection circuit ground GND of the other end connection circuit positive pole VCC of resistance R1, NPN silicon transistor VT1;
Voltage compare and electrical level output circuit: it is made up of operational amplifier IC2 and potentiometer RP, the model that operational amplifier IC2 selects is CA3140,3rd pin of operational amplifier IC2 connects the colelctor electrode of NPN transistor VT1,2nd pin of operational amplifier IC2 connects the movable end of potentiometer RP, one end of potentiometer RP and the 7th pin connection circuit positive pole VCC of operational amplifier IC2, the other end of potentiometer RP and the 4th pin connection circuit ground GND of operational amplifier IC2, the output termination electrical heating of operational amplifier IC2 and fan drive circuit;
Electrical heating and fan drive circuit: it is made up of silicon rectifier diode D1, bidirectional triode thyristor BCR, electrical heating wire RL and blower fan FJ, 6th pin of operational amplifier IC2 connects the positive pole of silicon rectifier diode D1, the negative pole of silicon rectifier diode D1 meets the control pole G of bidirectional triode thyristor BCR, the first anode T1 of bidirectional triode thyristor BCR connects one end of electrical heating wire RL and one end of blower fan FJ, the second plate T2 connection circuit ground GND of the live wire end L of the other end of electrical heating wire RL and another termination 220V AC power of blower fan FJ, bidirectional triode thyristor BCR;
12V halfwave rectifier voltage-stabilized power supply: it is by decompression capacitor C4, bleeder resistance R2, silicon rectifier diode D2, filter capacitor C3 and silicon voltage regulator diode DW forms, the technical parameter that silicon voltage regulator diode DW uses is 12V, the live wire end L of 220V AC power connects one end of decompression capacitor C4 and one end of bleeder resistance R2, the positive pole of the other end of decompression capacitor C4 and another termination silicon rectifier diode D2 of bleeder resistance R2, the negative pole of silicon rectifier diode D2 connects the negative pole of silicon voltage regulator diode DW and the positive pole of filter capacitor C3, the positive pole of silicon voltage regulator diode DW and the negative pole connection circuit ground GND of filter capacitor C3,
The positive pole of 12V halfwave rectifier voltage-stabilized power supply is connected with circuit anode VCC, and the negative pole of 12V halfwave rectifier voltage-stabilized power supply is connected with the zero line side N of circuit ground GND and 220V AC power.
Accompanying drawing explanation
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides an infrared probe type hand drier.
Detailed description of the invention
According to the infrared probe type hand drier circuit working schematic diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in utility model content, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the utility model, is further described correlation technique of the present utility model below in conjunction with embodiment.
Components and parts title and important technological parameters:
IC1 infrared probe selects LN074B type, red line connection circuit positive pole VCC, and black line connects DC power cathode, that is: circuit ground GND;
IC2 operational amplifier, integrated circuit model adopts CA3140, and it is that 8 pin dual inline type DIP encapsulate, and it is the operational amplifier of input with a slice MOSFET, having high input impedance is 1.5T Ω and extremely low input current (10PA), is suitable for making small-signal and amplifies;
VT1 is NPN transistor, selects model to be 2SC9013, multiplication factor β >=180;
BCR is bidirectional triode thyristor, and the technical parameter of use is 450V, 16A;
DW Zener diode, the voltage stabilizing value selected is 12V, power is 1W;
D1 ~ D2 is silicon rectifier diode, and the model selected is 1N4007;
RP is potentiometer, and its resistance is 22K Ω;
The resistance of resistance R1 is 10K Ω, power is 1/8W; The resistance of resistance R2 is 6.8K Ω; R2 is bleeder resistance, and its resistance is 680K Ω, and power is 1W;
C1 is electrochemical capacitor, and capacity is 47 μ F/25V; C2 is electric capacity of the dacron, and its capacity is 0.039 μ F; C3 is filter capacitor, and capacity is 1000 μ F/25V; C4 is decompression capacitor, and capacity is 0.68 μ F/450V;
RL is electrical heating wire, and the technical parameter of use is 220V, 1500W;
Blower fan uses series-wound motor and permanent magnet motor, and its technical parameter is 220V, 180W.
Circuit production main points and circuit debugging:
Because the circuit structure of infrared probe type hand drier is fairly simple, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present utility model only needs to debug simply and can normally work;
Circuit debugging is regulator potentiometer RP mainly, selects suitable reference voltage, to obtain suitable detectivity; Appropriate location in the infrared probe type that the is arranged on hand drier of infrared probe, the plane of infrared probe lens is the depression angle of about 13 degree to ground.Investigative range due to infrared probe lens is the conical region of 85 degree, so should select desirable position and angle when mounted, to reduce detection dead band as far as possible;
Finally by 220V AC power, hair brush motor driving circuit section is debugged.
Circuit structure design of the present utility model, components' placement; and its face shaping design and size etc. thereof are not all key technologies of the present utility model; neither the claimed guardian technique content of the utility model; because not affecting the realization of the utility model specific implementation process and utility model object, therefore do not illustrate one by one in the description.
Claims (1)
1. an infrared probe type hand drier, it comprises 220V AC power, 12V halfwave rectifier voltage-stabilized power supply, infrared probe circuit, infrared signal amplification and negative-feedback circuit, voltage compare and electrical level output circuit, electrical heating and fan drive circuit, it is characterized in that:
In described infrared probe circuit, the model that infrared probe IC1 selects is LN074B, and black wrapped circuits ground GND, the output S of infrared probe IC1 of the red line connection circuit positive pole VCC of infrared probe IC1, infrared probe IC1 connect the positive pole of electrochemical capacitor C1;
Described infrared signal is amplified and negative-feedback circuit is made up of electrochemical capacitor C1, NPN transistor VT1, resistance R1 and electric capacity C2, the base stage of NPN transistor VT1 connects the negative pole of electrochemical capacitor C1 and one end of electric capacity C2, one end of colelctor electrode connecting resistance R1 of NPN transistor VT1 and the other end of electric capacity C2, the emitter stage connection circuit ground GND of the other end connection circuit positive pole VCC of resistance R1, NPN silicon transistor VT1;
Described voltage compare and electrical level output circuit are made up of operational amplifier IC2 and potentiometer RP, the model that operational amplifier IC2 selects is CA3140,3rd pin of operational amplifier IC2 connects the colelctor electrode of NPN transistor VT1,2nd pin of operational amplifier IC2 connects the movable end of potentiometer RP, one end of potentiometer RP and the 7th pin connection circuit positive pole VCC of operational amplifier IC2, the other end of potentiometer RP and the 4th pin connection circuit ground GND of operational amplifier IC2, the output termination electrical heating of operational amplifier IC2 and fan drive circuit;
Described electrical heating and fan drive circuit are made up of silicon rectifier diode D1, bidirectional triode thyristor BCR, electrical heating wire RL and blower fan FJ, 6th pin of operational amplifier IC2 connects the positive pole of silicon rectifier diode D1, the negative pole of silicon rectifier diode D1 meets the control pole G of bidirectional triode thyristor BCR, the first anode T1 of bidirectional triode thyristor BCR connects one end of electrical heating wire RL and one end of blower fan FJ, the second plate T2 connection circuit ground GND of the live wire end L of the other end of electrical heating wire RL and another termination 220V AC power of blower fan FJ, bidirectional triode thyristor BCR;
Described 12V halfwave rectifier voltage-stabilized power supply is by decompression capacitor C4, bleeder resistance R2, silicon rectifier diode D2, filter capacitor C3 and silicon voltage regulator diode DW forms, the technical parameter that silicon voltage regulator diode DW uses is 12V, the live wire end L of 220V AC power connects one end of decompression capacitor C4 and one end of bleeder resistance R2, the positive pole of the other end of decompression capacitor C4 and another termination silicon rectifier diode D2 of bleeder resistance R2, the negative pole of silicon rectifier diode D2 connects the negative pole of silicon voltage regulator diode DW and the positive pole of filter capacitor C3, the positive pole of silicon voltage regulator diode DW and the negative pole connection circuit ground GND of filter capacitor C3,
The positive pole of described 12V halfwave rectifier voltage-stabilized power supply is connected with circuit anode VCC, and the negative pole of 12V halfwave rectifier voltage-stabilized power supply is connected with the zero line side N of circuit ground GND and 220V AC power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520890215.5U CN205094291U (en) | 2015-11-04 | 2015-11-04 | Infrared probe type dries by fire hand ware |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520890215.5U CN205094291U (en) | 2015-11-04 | 2015-11-04 | Infrared probe type dries by fire hand ware |
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| Publication Number | Publication Date |
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| CN205094291U true CN205094291U (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520890215.5U Expired - Fee Related CN205094291U (en) | 2015-11-04 | 2015-11-04 | Infrared probe type dries by fire hand ware |
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| CN (1) | CN205094291U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105212815A (en) * | 2015-11-04 | 2016-01-06 | 何林 | Infrared probe type hand drier |
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2015
- 2015-11-04 CN CN201520890215.5U patent/CN205094291U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105212815A (en) * | 2015-11-04 | 2016-01-06 | 何林 | Infrared probe type hand drier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160323 Termination date: 20161104 |
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| CF01 | Termination of patent right due to non-payment of annual fee |