CN207926483U - A kind of television set fan energy-saving circuit - Google Patents
A kind of television set fan energy-saving circuit Download PDFInfo
- Publication number
- CN207926483U CN207926483U CN201820374878.5U CN201820374878U CN207926483U CN 207926483 U CN207926483 U CN 207926483U CN 201820374878 U CN201820374878 U CN 201820374878U CN 207926483 U CN207926483 U CN 207926483U
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- China
- Prior art keywords
- resistance
- power supply
- television set
- triode
- relay
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
A kind of television set fan energy-saving circuit, belongs to electric automatization field, and the utility model is to solve the problems, such as that existing television set heat sink conception influences television set service life.The utility model：220V AC powers are DC power supply by transformer pressure-reducing, rectifier bridge rectification, the DC power supply is powered for fan, series thermal-sensitive resistance in fan current supply circuit, the in-phase input end of the voltage value access amplifier A of the DC power supply, the base stage of the output end connecting triode Q of amplifier A, connect KM1 coils, buzzer LS and light bulb L1 between the collector and power supply VCC of triode Q.The utility model is used for monitoring television internal temperature, the operation of closing television machine when the temperature super upper limit.
Description
Technical field
The utility model is related to a kind of control device of electric motor, belong to electric automatization field.
Background technology
Inside television arranges large number of electronic device, these devices are working long hours, and the electric current flowed through causes
Device heating, having put aside excessively high heat can cause the dielectric strength of device to reduce, and electrical equipment breaks down.General television set
Box body be all it is closed, under normal circumstances using in its box install exhaust fan by the way of come increase its inner air circulation,
The electrical equipment of inside television is allowed effectively to radiate.It is normal that the main function of exhaust fan is to maintain the temperature in the box of television set,
The safety and stability of product operation can effectively be improved.But existing radiating mode is：No matter whether temperature is exceeded in box,
Fan is all constantly in non-stop run state, and such fan is easy overload and damages, once exhaust fan damages, although will not
Cause total current excessively high, but temperature in box can be made to increase, influences the use of electrical equipment, influence the service life of television set.
Invention content
The utility model aim is to solve the problems, such as that existing television set heat sink conception influences television set service life, carry
A kind of television set fan energy-saving circuit is supplied.
A kind of television set fan energy-saving circuit described in the utility model, it includes transformer T, rectifier bridge, DC relay
KM1, thermistor R1, resistance R2, resistance R3, resistance R4, operational amplifier A, triode Q and dc motor M；
The primary coil of transformer T connects 220V AC powers, and is in series with the normal of DC relay KM1 on the branch road
Closed contact；
The ac input end of the secondary coil connection rectifier bridge of transformer T；The cathode output end connection temperature-sensitive electricity of rectifier bridge
Hinder one end of R1, the other end of thermistor R1 connects the positive power supply terminal and operational amplifier A of dc motor M simultaneously
In-phase input end；The cathode power supply terminal of the cathode output end connection dc motor M of rectifier bridge；
The inverting input of operational amplifier A connects one end of one end and resistance R3 of resistance R2 simultaneously；
The output end of operational amplifier A connects the base stage of the other end and triode Q of resistance R3 simultaneously；
The positive power supply terminal of operational amplifier A connects one end of power supply VCC and DC relay KM1 coils simultaneously；
The cathode power supply terminal of operational amplifier A is grounded；
One end of the emitter connection resistance R4 of triode Q；The other end of resistance R4 and the other end of resistance R2 connect simultaneously
Ground；
The other end of the collector connection DC relay KM1 coils of triode Q.
Preferably, rectifier bridge is made of diode D1, diode D2, diode D3 and diode D4.
Preferably, further include audible alarm unit, the audible alarm unit is completed using buzzer LS, buzzer LS
It is connected between the collector of triode Q and DC relay KM1.
Preferably, further include light alarm unit, the light alarm unit is completed by light bulb L1, and light bulb L1 is connected on three poles
Between the collector and DC relay KM1 of pipe Q.
The beneficial effects of the utility model：Television set fan energy-saving circuit described in the utility model is by thermistor and electronic
Machine is connected, and according to the variation of internal temperature of TV set, the rotating speed of motor and then changes, can also be certainly if television set temperature is excessively high
It is dynamic to cut off the power, sound-light alarm is carried out, it is i.e. energy saving and safe in this way.
Description of the drawings
Fig. 1 is a kind of circuit diagram of television set fan energy-saving circuit described in the utility model.
Specific implementation mode
Specific implementation mode one：A kind of television set fan energy-saving circuit described in present embodiment, which is characterized in that it includes
Transformer T, rectifier bridge, DC relay KM1, thermistor R1, resistance R2, resistance R3, resistance R4, operational amplifier A, three poles
Pipe Q, dc motor M, buzzer LS and light bulb L1；
The primary coil of transformer T connects 220V AC powers, and is in series with the normal of DC relay KM1 on the branch road
Closed contact；
The ac input end of the secondary coil connection rectifier bridge of transformer T；The cathode output end connection temperature-sensitive electricity of rectifier bridge
Hinder one end of R1, the other end of thermistor R1 connects the positive power supply terminal and operational amplifier A of dc motor M simultaneously
In-phase input end；The cathode power supply terminal of the cathode output end connection dc motor M of rectifier bridge；
The inverting input of operational amplifier A connects one end of one end and resistance R3 of resistance R2 simultaneously；
The output end of operational amplifier A connects the base stage of the other end and triode Q of resistance R3 simultaneously；
The positive power supply terminal of operational amplifier A connects one end of power supply VCC and DC relay KM1 coils simultaneously；
The cathode power supply terminal of operational amplifier A is grounded；
One end of the emitter connection resistance R4 of triode Q；The other end of resistance R4 and the other end of resistance R2 connect simultaneously
Ground；
The collector of triode Q connects power supply by concatenated buzzer LS, light bulb L1 with DC relay KM1 coils
VCC。
Rectifier bridge is made of diode D1, diode D2, diode D3 and diode D4.
Operation principle：Dc motor M is the motor of fan, when television set connects the operation of 220V power supplys, 220V exchanges
Electricity exports direct current through transformer T decompressions, rectifier bridge, which provides working power to fan and subsequent conditioning circuit, and fan turns therewith
Dynamic, since temperature is low at this time, thermistor R1 resistance values are big, so slow (i.e. the rotating speed of M is slow) that fan turns, sees when for a long time
After TV, temperature gradually increases, and thermistor R1 resistance values reduce, the faster rotational speed of fan, when the temperature is changed, thermistor R1
Voltage allocation proportion is also changing between motor M, if the excessively high pressure drop that can lead to thermistor R1 of temperature becomes very little,
Then the direct current supply voltage of output to A are bigger, then operational amplifier A output HIGH voltage, the Q conductings of driving triode, Jin Erjin
Row sound-light alarm, and DC relay KM1 coils obtain electric, and the normally closed electric shocks of DC relay KM1 disconnect, and cut off the power, and close
Television set.Ceiling temperature can be adjusted by the resistance value of control resistance R2, resistance R3, resistance R4, save the same of electric energy in this way
When, it in turn ensures the safety of television set, prolongs the service life.
Although the embodiment disclosed by the utility model is as above, the content is only to facilitate understand this practicality
Novel and use embodiment, is not limited to the utility model.Skill in any the utility model technical field
Art personnel can be in the formal and details of implementation under the premise of not departing from the spirit and scope disclosed by the utility model
On make any modification and variation, but the scope of patent protection of the utility model, must still be defined with appended claims
Range subject to.
Claims (4)
1. a kind of television set fan energy-saving circuit, which is characterized in that it includes transformer T, rectifier bridge, DC relay KM1, heat
Quick resistance R1, resistance R2, resistance R3, resistance R4, operational amplifier A, triode Q and dc motor M；
The primary coil of transformer T connects 220V AC powers, and is in series with the normally closed of DC relay KM1 on the branch road and touches
Point；
The ac input end of the secondary coil connection rectifier bridge of transformer T；The cathode output end connection thermistor R1 of rectifier bridge
One end, the other end of thermistor R1 connects the positive power supply terminal of dc motor M and the same phase of operational amplifier A simultaneously
Input terminal；The cathode power supply terminal of the cathode output end connection dc motor M of rectifier bridge；
The inverting input of operational amplifier A connects one end of one end and resistance R3 of resistance R2 simultaneously；
The output end of operational amplifier A connects the base stage of the other end and triode Q of resistance R3 simultaneously；
The positive power supply terminal of operational amplifier A connects one end of power supply VCC and DC relay KM1 coils simultaneously；
The cathode power supply terminal of operational amplifier A is grounded；
One end of the emitter connection resistance R4 of triode Q；The other end of resistance R4 and the other end of resistance R2 are grounded simultaneously；
The other end of the collector connection DC relay KM1 coils of triode Q.
2. a kind of television set fan energy-saving circuit according to claim 1, which is characterized in that rectifier bridge is by diode D1, two
Pole pipe D2, diode D3 and diode D4 are constituted.
3. a kind of television set fan energy-saving circuit according to claim 1, which is characterized in that further include audible alarm unit,
The audible alarm unit is completed using buzzer LS, and buzzer LS is connected on the collector and DC relay of triode Q
Between KM1.
4. according to a kind of television set fan energy-saving circuit of claim 1 or 3, which is characterized in that further include light alarm unit,
The light alarm unit is completed by light bulb L1, and light bulb L1 is connected between the collector of triode Q and DC relay KM1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820374878.5U CN207926483U (en) | 2018-03-19 | 2018-03-19 | A kind of television set fan energy-saving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820374878.5U CN207926483U (en) | 2018-03-19 | 2018-03-19 | A kind of television set fan energy-saving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207926483U true CN207926483U (en) | 2018-09-28 |
Family
ID=63596037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820374878.5U Expired - Fee Related CN207926483U (en) | 2018-03-19 | 2018-03-19 | A kind of television set fan energy-saving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207926483U (en) |
-
2018
- 2018-03-19 CN CN201820374878.5U patent/CN207926483U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20190319 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |