CN202152747U - Large power led lamp temperature control circuit - Google Patents
Large power led lamp temperature control circuit Download PDFInfo
- Publication number
- CN202152747U CN202152747U CN2011201858717U CN201120185871U CN202152747U CN 202152747 U CN202152747 U CN 202152747U CN 2011201858717 U CN2011201858717 U CN 2011201858717U CN 201120185871 U CN201120185871 U CN 201120185871U CN 202152747 U CN202152747 U CN 202152747U
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- China
- Prior art keywords
- circuit
- relay
- led lamp
- temperature control
- resistance
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- Expired - Fee Related
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Abstract
The utility model relates to a large power LED lamp temperature control circuit and belongs to the field of large power LED fixtures. The large power LED lamp temperature control circuit comprises a control unit circuit and a fan circuit and is characterized in that the control unit circuit is formed by an AC-DC direct-current power supply circuit, a voltage comparator circuit and a relay J1; the direct-current power supply circuit employs a resistor and a capacitor for voltage reduction and a bridge rectifier; and a normally open contact of the relay J1 is connected to the fan circuit. The large power LED lamp temperature control circuit is capable of sensing temperature changes of the fixtures, solves the problem relates to the heat radiation of the fixtures, is simple, and is stable and reliable during working.
Description
Technical field
The utility model belongs to the high-power LED lamp field, and particularly a kind of temperature is spent the high-power LED lamp circuit of control automatically.
Background technique
LED energy-saving and environmental protection, the idea that the life-span is long, applicable situation is wide, safe in utilization are rooted in the hearts of the people gradually, become the direction of illuminating industry future development.The LED device has its unique requirement as light source using, and it not only need stablize, DC electrical source is as driving reliably, efficiently; And because the LED LED light emitting deivce is a cold light source, and operating temperature is too high, can influence its luminous efficiency and life-span greatly, so the heat radiation of LED light fixture is whole particularly crucial in manufacturing and designing.
Summary of the invention
The purpose of the utility model is to provide a kind of high-powered LED lamp temperature control circuit that heat radiation is controlled to the positive drive type convection type.
The utility model is achieved in that
The high-powered LED lamp temperature control circuit mainly comprises control unit circuit and blower fan circuit, it is characterized in that: said control unit circuit is made up of AC-DC DC power supply circuit, voltage comparator circuit and relay J 1; Said DC power supply circuit adopts resistance-capacitance depressurization, bridge rectifier; The normally opened contact of relay J 1 inserts in the blower fan circuit.
Said voltage comparator circuit mainly is made up of the LM339 voltage comparator, and resistance R 104 is connected between the inverting input and direct-flow positive pole of LM339 voltage comparator, and resistance R 105 and potentiometer RP101 are connected in series between inverting input and the ground; Thermistor RT is connected between the in-phase input end and direct-flow positive pole of LM339 voltage comparator, connecting resistance R103 between in-phase input end and the ground; Triode BG101 base stage connects resistance R 107 and diode D106, and emitter directly connects direct current ground, and collector electrode connects said relay J 1.
Said relay J 1 is joined with direct-flow positive pole, and capacitor C 104 is with diode D107 and be connected in relay J 1 two ends.
Dc fan M obtains operating voltage by the civil power bridge rectifier in the blower fan circuit, and filter capacitor C106 is parallelly connected with blower fan M, and the normally opened contact of relay J 1 seals in direct-flow positive pole and the filter capacitor C106 anode after the rectification.
After the utility model adopts said structure, variation that can effectively perception lamp temperatures, when temperature reaches when setting maximum temperature value, relay closes, the blower fan energising is rotated, and light fixture is lowered the temperature; When temperature dropped to ambient temperature, relay broke off, the blower fan stall.Efficiently solve the heat dissipation problem of light fixture, guaranteed illumination and the working life of LED; Circuit is simple, and working stability is reliable.
Description of drawings
Fig. 1 is the functional-block diagram of the utility model.
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment
Embodiment to the utility model elaborates below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model is the high-powered LED lamp temperature control circuit, mainly comprises control unit circuit and blower fan circuit, and said control unit circuit is made up of AC-DC DC power supply circuit, voltage comparator circuit and relay J 1; Said DC power supply circuit, is inserted in the dc fan circuit through relay J 1 normally opened contact through capacitance decompression, diode rectification by civil power input AC 220V.
In the control unit circuit as shown in Figure 2, the AC-DC DC power supply circuit adopts capacitor C 101 and resistance R 101 resistance-capacitance depressurizations by civil power input AC 220V; Diode D101, D102, D103 and D104 form bridge rectifier; Resistance R V101 is an over-voltage protection element, and C102 is a filter capacitor, and R102 is a current-limiting resistance; Reference diode WZ101 is connected to direct current ground and resistance R 102 1 ends, output dc voltage.Diode D105 plays buffer action, connects power circuit and voltage comparator circuit.The potential comparator circuit mainly is made up of the LM339 voltage comparator, adopts single power supply, and 3 pin are just connecing power supply, 12 pin ground connection, and resistance R 106 is a feedback resistance.Thermistor RT and resistance R 103 are connected to the in-phase input end of LM339 voltage comparator, and a signal voltage is provided; Resistance R 104, R105 form the bleeder circuit of connecting with RP101, are connected to the inverting input of LM339 voltage comparator, and a reference voltage (being threshold voltage) is provided, and the resistance of regulating resistance R P101 can change threshold voltage, both the size of set temperature value.When built-in temperature is setting value when following, "+" terminal voltage is less than "-" terminal voltage, and output terminal 1 pin is a low potential; When built-in temperature surpassed setting value, "+" terminal voltage was greater than "-" terminal voltage, and 1 pin is exported high level.Connect voltage comparator circuit and relay J 1 through isolating diode D106.When the LM339 voltage comparator was output as low level, triode BG101 was in cut-off state, and the current collection of connection relay J 1 is low level very; Relay J 1 is in off state; Capacitor C 104 is connected to relay J 1 two ends with diode D107 and shields, when voltage comparator is output as high level, and triode BG101 conducting; The current collection of connection relay J 1 is high level very, relay J 1 closure.The normally opened contact of relay J 1 inserts in the dc fan circuit.
In the blower fan loop as shown in Figure 2; By civil power input AC 220V, through capacitor C 105 and resistance R 109 resistance-capacitance depressurizations, diode D108, D109, D110, D111 bridge rectifier; Filter capacitor C106 two ends output 12V VDC is connected to load dc fan M two ends.Two lead-in wires of relay J 1 are gone here and there between diode D109 negative terminal and capacitor C 106.
When relay J 1 was broken off, dc fan M did not have electricity and does not work; When relay J 1 closure, dc fan M energising is started working.Dc fan M also is connected with reference diode and the protective circuit of electric capacity composition, can also realize the delay working time to dc fan through the capacity that changes electric capacity.
Claims (4)
1. the high-powered LED lamp temperature control circuit mainly comprises control unit circuit and blower fan circuit, it is characterized in that: said control unit circuit is made up of AC-DC DC power supply circuit, voltage comparator circuit and relay J 1; Said DC power supply circuit adopts resistance-capacitance depressurization, bridge rectifier; The normally opened contact of relay J 1 inserts in the blower fan circuit.
2. high-powered LED lamp temperature control circuit according to claim 1; It is characterized in that: said voltage comparator circuit mainly is made up of the LM339 voltage comparator; Resistance R 104 is connected between the inverting input and direct-flow positive pole of LM339 voltage comparator, and resistance R 105 and potentiometer RP101 are connected in series between inverting input and the ground; Thermistor RT is connected between the in-phase input end and direct-flow positive pole of LM339 voltage comparator, connecting resistance R103 between in-phase input end and the ground; Triode BG101 base stage connects resistance R 107 and diode D106, and emitter directly connects direct current ground, and collector electrode connects said relay J 1.
3. high-powered LED lamp temperature control circuit according to claim 1 and 2 is characterized in that: said relay J 1 is joined with direct-flow positive pole, and capacitor C 104 is with diode D107 and be connected in relay J 1 two ends.
4. high-powered LED lamp temperature control circuit according to claim 3; It is characterized in that: dc fan M obtains operating voltage by the civil power bridge rectifier in the blower fan circuit; Filter capacitor C106 is parallelly connected with blower fan M, and the normally opened contact of relay J 1 seals in direct-flow positive pole and the filter capacitor C106 anode after the rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201858717U CN202152747U (en) | 2011-05-22 | 2011-05-22 | Large power led lamp temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201858717U CN202152747U (en) | 2011-05-22 | 2011-05-22 | Large power led lamp temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202152747U true CN202152747U (en) | 2012-02-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201858717U Expired - Fee Related CN202152747U (en) | 2011-05-22 | 2011-05-22 | Large power led lamp temperature control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202152747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216435A (en) * | 2013-05-31 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | Control circuit |
-
2011
- 2011-05-22 CN CN2011201858717U patent/CN202152747U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216435A (en) * | 2013-05-31 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | Control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Ruiqing Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120229 Termination date: 20130522 |