CN104235803A - Lamp with active heat dissipating device - Google Patents
Lamp with active heat dissipating device Download PDFInfo
- Publication number
- CN104235803A CN104235803A CN201310237854.7A CN201310237854A CN104235803A CN 104235803 A CN104235803 A CN 104235803A CN 201310237854 A CN201310237854 A CN 201310237854A CN 104235803 A CN104235803 A CN 104235803A
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- China
- Prior art keywords
- active heat
- voltage
- heat radiating
- radiating device
- lamp
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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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- 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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention provides a lamp with an active heat dissipating device. The lamp with the active heat dissipating device comprises a lamp body, the active heat dissipating device used for dissipating heat of the lamp and a circuit system. The circuit system comprises a voltage distributing unit, a temperature sensing unit, a voltage comparator, a switch tube and a controlled switch. The input end of the temperature sensing unit and the input end of the voltage distributing unit are connected with the input end of the a power source, the output end of the temperature sensing unit and the output end of the voltage distributing unit are connected with the two input ends of the voltage comparator, the output end of the voltage comparator is connected with the control end of the switch tube, the voltage comparator outputs comparison voltage from the output end according to the comparison result of the voltage input by the two input ends and controls the switch tube to be communicated/stopped, the high voltage end of the switch tube is connected with the input end of the power source through the sensing end, and the lower voltage end of the switch tube is grounded. The controlled end is connected with the active heat dissipating device in series and then is connected with the lamp body in parallel. According to the lamp, the temperature of the lamp is automatically detected, in other words, the active heat dissipating device is automatically controlled to be turned on/off, and thus energy is saved.
Description
Technical field
The present invention relates to lighting device, especially relate to a kind of light fixture with active heat radiating device.
Background technology
A lot of large-power lamp is owing to working long hours, and cause heating greatly bright, light fixture heat radiation is most important.
The light fixture of traditional band active heat radiating device (such as fan), is generally opening/closing by user's ACTIVE CONTROL heat abstractor, easily causes the waste of the energy.
Summary of the invention
Based on this, be necessary to provide a kind of light fixture with active heat radiating device that initiatively can carry out the opening/closing control of heat abstractor according to the temperature of light fixture.
A kind of light fixture with active heat radiating device, comprise lamp, for the active heat radiating device that dispels the heat to light fixture and Circuits System, described Circuits System comprises partial pressure unit, temperature induction unit, voltage comparator, switching tube and controlled switch, described controlled switch comprises induction end and controlled end, the conducting when induction end obtains electric of described controlled end, ends when induction end dead electricity, the input of described temperature induction unit is connected power input with the input of partial pressure unit, the output of described temperature induction unit is connected two inputs of described voltage comparator with the output of partial pressure unit, the ratio of the voltage that described temperature induction unit exports and the voltage that power supply inputs changes with the temperature of lamp, described partial pressure unit exports the voltage that the voltage inputted with power supply is fixed proportion, the output of described voltage comparator is connected with the control end of described switching tube, the result that the voltage swing that voltage comparator inputs according to two inputs compares exports comparative voltage by output, control described switching tube conduction and cut-off, described switching tube ends lower than during heat radiation threshold value in the temperature of described lamp, higher than conducting during heat radiation threshold value, the high-pressure side of described switching tube connects described power input by described induction end, the low-pressure end ground connection of described switching tube, described controlled end is in parallel with described lamp after connecting with described active heat radiating device.
Wherein in an embodiment, described controlled switch is normal-open type relay, and described induction end is relay coil, and described controlled end is relay contact.
Wherein in an embodiment, described partial pressure unit comprises two resistance be connected in series, and an input of described voltage comparator is connected between described two series resistances.
Wherein in an embodiment, described temperature induction unit comprises divider resistance and semistor, described voltage comparator is operational amplifier, the anti-phase input of described operational amplifier is terminated between described two series resistances, described divider resistance one end connects described power input, the other end connects the in-phase input end of described operational amplifier, described semistor one end connects described in-phase input end, other end ground connection, described switching tube is N-channel MOS pipe, described control end is the grid of metal-oxide-semiconductor, described high-pressure side is the drain electrode of metal-oxide-semiconductor, described low-pressure end is the source electrode of metal-oxide-semiconductor.
Wherein in an embodiment, described temperature induction unit comprises divider resistance and negative tempperature coefficient thermistor, described voltage comparator is operational amplifier, the anti-phase input of described operational amplifier is terminated between described two series resistances, described negative tempperature coefficient thermistor one end connects described power input, the other end connects the in-phase input end of described operational amplifier, described divider resistance one end connects described in-phase input end, other end ground connection, described switching tube is N-channel MOS pipe, described control end is the grid of metal-oxide-semiconductor, described high-pressure side is the drain electrode of metal-oxide-semiconductor, described low-pressure end is the source electrode of metal-oxide-semiconductor.
Wherein in an embodiment, described divider resistance is variable resistor.
Wherein in an embodiment, described Circuits System also comprises the first current-limiting resistance, the second current-limiting resistance and indicator lamp, described second current-limiting resistance is connected between the output of described operational amplifier and described grid, between the output that described indicator lamp is connected to described operational amplifier after connecting with described first current-limiting resistance and ground wire.
Wherein in an embodiment, described Circuits System also comprises diode, and the anode of described diode is connected between described induction end and the high-pressure side of switching tube, and the negative electrode of described diode is connected between described induction end and power input.
Wherein in an embodiment, described Circuits System also comprises the filter capacitor be connected between described power input and ground wire.
Wherein in an embodiment, described active heat radiating device is fan.
The above-mentioned light fixture with active heat radiating device, switch closes back light and obtains electric work, when the lamp temperatures that temperature induction unit detects does not reach heat radiation threshold value, active heat radiating device does not work, namely the automatic detection achieving lamp temperatures carries out the opening/closing control of active heat radiating device automatically, has saved the energy.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the Circuits System of the light fixture in an embodiment with active heat radiating device;
Fig. 2 is the circuit theory diagrams of the Circuits System of the light fixture in another embodiment with active heat radiating device.
Detailed description of the invention
For enabling object of the present invention, feature and advantage more become apparent, and are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
The invention provides a kind of light fixture with active heat radiating device, comprise lamp, for the active heat radiating device that dispels the heat to lamp and Circuits System.Fig. 1 is the circuit structure diagram of the Circuits System of the light fixture in an embodiment with active heat radiating device, comprises strong power part and weak current part.Wherein weak current part comprises temperature induction unit 110, partial pressure unit 120, voltage comparator 130, switching tube 140 and controlled switch induction end 152; Lamp is connected between the live wire of strong power part and zero line, and controlled switch controlled end 154 is in parallel with lamp together with active heat radiating device 160 after connecting with active heat radiating device 160, and is subject to the control of switch S together with lamp.Controlled switch controlled end 154 controlled switch induction end 152 electric time conducting (or closed), in controlled switch induction end 152 dead electricity time cut-off (or disconnection).
The input of temperature induction unit 110 is connected DC supply input (Vcc) with the input of partial pressure unit 120, and the output of temperature induction unit 110 is connected two inputs of voltage comparator 130 with the output of partial pressure unit 120.The ratio of the voltage that temperature induction unit 110 exports and the voltage that power supply inputs changes with the temperature of lamp (magnitude of voltage that namely temperature induction unit 110 exports changes with the temperature of lamp), and partial pressure unit 120 exports the voltage that the magnitude of voltage inputted with power supply is fixed proportion.The output of voltage comparator 130 is connected with the control end of switching tube 140, and the result that the voltage swing that voltage comparator 130 inputs according to two inputs compares exports comparative voltage (high level or low level), with gauge tap pipe 140 conduction and cut-off by output.The high-pressure side of switching tube 140 connects power input by controlled switch induction end 152, the low-pressure end ground connection of switching tube 140.
By the parameter of choose reasonable temperature induction unit 110, when the temperature of the lamp that it is detected reaches heat radiation threshold value, the magnitude of voltage that temperature induction unit 110 exports is equal with the magnitude of voltage that partial pressure unit 120 exports, thus when lamp temperatures is increased over heat radiation threshold value gradually, the voltage that voltage comparator 130 exports realizes upset, switching tube 140 becomes conducting state from cut-off state, controlled switch induction end 152 obtains electric, controlled switch controlled end 154 conducting, active heat radiating device 160 obtains electric starting working, and dispels the heat to light fixture.
The above-mentioned light fixture with active heat radiating device, close switch S back light obtains electric work, when the lamp temperatures that temperature induction unit 110 detects does not reach heat radiation threshold value, active heat radiating device 160 does not work, achieve the opening/closing control that lamp temperatures automatically detects and automatically carries out active heat radiating device 160, save the energy.
Fig. 2 is the circuit theory diagrams of the Circuits System of the light fixture in another embodiment with active heat radiating device, in this embodiment, controlled switch adopts normal-open type relay to realize, controlled switch induction end is relay coil K, and controlled switch controlled end is relay contact K-1.Controlled switch also can adopt other components and parts in other embodiments, such as photoelectrical coupler, and now controlled switch induction end is photophore, and controlled switch controlled end is light-receiving device.
In the present embodiment, voltage comparator is operational amplifier U1, and temperature induction unit comprises divider resistance R1 and positive temperature coefficient (PTC) thermistor RT, and partial pressure unit comprises two resistance R2 and R3 be connected in series.The anti-phase input of operational amplifier U1 is terminated between resistance R2 and R3.Divider resistance R1 one end connects the in-phase input end of power input Vcc, other end concatenation operation amplifier U1, and semistor RT one end connects in-phase input end, other end ground connection.Switching tube is N-channel MOS FET(metal oxide semiconductor field effect tube) Q1, the control end of switching tube is the grid of metal-oxide-semiconductor Q1, and high-pressure side is the drain electrode of metal-oxide-semiconductor Q1, and low-pressure end is the source electrode of metal-oxide-semiconductor Q1.Understandable, in other embodiments, switching tube also can replace by NPN type triode.Semistor RT can be attached at the position of lamp outer casing near lamp, to detect the temperature of lamp.
In another embodiment, also the annexation of the in-phase input end of operational amplifier U1 and inverting input can be exchanged, N-channel MOS pipe Q1 be replaced with P channel MOS tube simultaneously.Or controlled switch is replaced with closed type relay, the annexation of the in-phase input end of operational amplifier U1 and inverting input is exchanged simultaneously.
When the temperature of lamp is in normal range (NR) time (lower than heat radiation threshold value), semistor RT resistance is less, semistor RT both end voltage is lower than the voltage (reference voltage) on R3, now the in-phase input end voltage of operational amplifier U1 is less than anti-phase input terminal voltage, output no-output, metal-oxide-semiconductor Q1 disconnects, relay coil K dead electricity, contact K-1 disconnects, active heat radiating device (being fan in the present embodiment) does not work, live wire L, zero line N are normally for lamp is powered, and lamp normally works.In other embodiments, active heat radiating device also can adopt miscellaneous equipment, such as liquid cooling apparatus etc.
In the embodiment depicted in figure 2, Circuits System also comprises the first current-limiting resistance R4, the second current-limiting resistance R5, diode D1, filter capacitor C1 and indicator lamp LED.Second current-limiting resistance R5 is connected between the output of operational amplifier U1 and the grid of metal-oxide-semiconductor Q1, between the output that indicator lamp LED is connected to operational amplifier U1 after connecting with the first current-limiting resistance R4 and ground wire.The anode of diode D1 is connected between the drain electrode of relay coil K and metal-oxide-semiconductor Q1, and the negative electrode of diode D1 is connected between relay coil K and power input Vcc.Filter capacitor C1 is connected between power input Vcc and ground wire.
After the temperature of lamp is elevated to heat radiation threshold value, semistor RT resistance becomes large, make semistor RT both end voltage higher than the voltage on R3, namely operational amplifier U1 in-phase input end voltage higher than inverting input, now the output of operational amplifier U1 exports high level, high level lights indicator lamp LED by the first current-limiting resistance R4, and it is too high that indicator lamp LED lights indicating lamp temperature.The output of operational amplifier U1 provides high level by the second current-limiting resistance R5 for metal-oxide-semiconductor Q1 grid simultaneously, and make metal-oxide-semiconductor Q1 conducting, relay coil K obtains electric work, contact K-1 adhesive, and fan obtains electric normal work, is light fixture heat radiation.If below the temperature return of lamp to heat radiation threshold value, blower fan quits work, and indicator lamp LED also extinguishes, thus can economize energy.
In another embodiment, temperature induction unit comprises divider resistance and negative temperature coefficient (NTC) thermistor, negative tempperature coefficient thermistor one end connects the in-phase input end of power input, other end concatenation operation amplifier, and divider resistance one end connects in-phase input end, other end ground connection.
Refer to Fig. 2, the resistance value due to divider resistance R1 is more difficult to be determined, therefore can use variable resistor, i.e. the resistance resistance that can regulate, by repeatedly debugging to obtain (light fixture) temperature that desirable resistance and fan are started working.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. one kind has the light fixture of active heat radiating device, comprise lamp, for the active heat radiating device that dispels the heat to light fixture and Circuits System, it is characterized in that, described Circuits System comprises partial pressure unit, temperature induction unit, voltage comparator, switching tube and controlled switch, described controlled switch comprises induction end and controlled end, the conducting when induction end obtains electric of described controlled end, ends when induction end dead electricity;
The input of described temperature induction unit is connected power input with the input of partial pressure unit, the output of described temperature induction unit is connected two inputs of described voltage comparator with the output of partial pressure unit, the ratio of the voltage that described temperature induction unit exports and the voltage that power supply inputs changes with the temperature of lamp, described partial pressure unit exports the voltage that the voltage inputted with power supply is fixed proportion, the output of described voltage comparator is connected with the control end of described switching tube, the result that the voltage swing that voltage comparator inputs according to two inputs compares exports comparative voltage by output, control described switching tube conduction and cut-off, described switching tube ends lower than during heat radiation threshold value in the temperature of described lamp, higher than conducting during heat radiation threshold value, the high-pressure side of described switching tube connects described power input by described induction end, the low-pressure end ground connection of described switching tube,
Described controlled end is in parallel with described lamp after connecting with described active heat radiating device.
2. the light fixture with active heat radiating device according to claim 1, is characterized in that, described controlled switch is normal-open type relay, and described induction end is relay coil, and described controlled end is relay contact.
3. the light fixture with active heat radiating device according to claim 1, is characterized in that, described partial pressure unit comprises two resistance be connected in series, and an input of described voltage comparator is connected between described two series resistances.
4. the light fixture with active heat radiating device according to claim 3, it is characterized in that, described temperature induction unit comprises divider resistance and semistor, described voltage comparator is operational amplifier, the anti-phase input of described operational amplifier is terminated between described two series resistances, described divider resistance one end connects described power input, the other end connects the in-phase input end of described operational amplifier, described semistor one end connects described in-phase input end, other end ground connection, described switching tube is N-channel MOS pipe, described control end is the grid of metal-oxide-semiconductor, described high-pressure side is the drain electrode of metal-oxide-semiconductor, described low-pressure end is the source electrode of metal-oxide-semiconductor.
5. the light fixture with active heat radiating device according to claim 3, it is characterized in that, described temperature induction unit comprises divider resistance and negative tempperature coefficient thermistor, described voltage comparator is operational amplifier, the anti-phase input of described operational amplifier is terminated between described two series resistances, described negative tempperature coefficient thermistor one end connects described power input, the other end connects the in-phase input end of described operational amplifier, described divider resistance one end connects described in-phase input end, other end ground connection, described switching tube is N-channel MOS pipe, described control end is the grid of metal-oxide-semiconductor, described high-pressure side is the drain electrode of metal-oxide-semiconductor, described low-pressure end is the source electrode of metal-oxide-semiconductor.
6. the light fixture with active heat radiating device according to claim 4 or 5, is characterized in that, described divider resistance is variable resistor.
7. the light fixture with active heat radiating device according to claim 4 or 5, it is characterized in that, described Circuits System also comprises the first current-limiting resistance, the second current-limiting resistance and indicator lamp, described second current-limiting resistance is connected between the output of described operational amplifier and described grid, between the output that described indicator lamp is connected to described operational amplifier after connecting with described first current-limiting resistance and ground wire.
8. the light fixture with active heat radiating device according to claim 1, it is characterized in that, described Circuits System also comprises diode, and the anode of described diode is connected between described induction end and the high-pressure side of switching tube, and the negative electrode of described diode is connected between described induction end and power input.
9. the light fixture with active heat radiating device according to claim 1, is characterized in that, described Circuits System also comprises the filter capacitor be connected between described power input and ground wire.
10. the light fixture with active heat radiating device according to claim 1, is characterized in that, described active heat radiating device is fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310237854.7A CN104235803A (en) | 2013-06-14 | 2013-06-14 | Lamp with active heat dissipating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310237854.7A CN104235803A (en) | 2013-06-14 | 2013-06-14 | Lamp with active heat dissipating device |
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| CN104235803A true CN104235803A (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310237854.7A Pending CN104235803A (en) | 2013-06-14 | 2013-06-14 | Lamp with active heat dissipating device |
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Cited By (6)
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| CN104730398A (en) * | 2015-04-09 | 2015-06-24 | 青岛歌尔声学科技有限公司 | Device precision measurement circuit |
| CN106843354A (en) * | 2017-04-11 | 2017-06-13 | 惠科股份有限公司 | A kind of current foldback circuit, display panel and display device |
| CN107738021A (en) * | 2017-11-08 | 2018-02-27 | 浙江颐顿机电有限公司 | Fan intelligent cooling control circuit in a kind of inverter type welder |
| CN108991888A (en) * | 2018-10-08 | 2018-12-14 | 聂小涵 | A kind of multifunction cup |
| US10379553B2 (en) | 2017-04-11 | 2019-08-13 | HKC Corporation Limited | Overcurrent protection circuit, display panel, and display device |
| CN110212777A (en) * | 2019-06-19 | 2019-09-06 | 杰华特微电子（杭州）有限公司 | The control circuit and control method for cascading circuit of reversed excitation, cascading circuit of reversed excitation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110212777A (en) * | 2019-06-19 | 2019-09-06 | 杰华特微电子（杭州）有限公司 | The control circuit and control method for cascading circuit of reversed excitation, cascading circuit of reversed excitation |
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Application publication date: 20141224 |