CN103369768B - A kind of lamp temperatures adaptive guard circuit and light fixture - Google Patents
A kind of lamp temperatures adaptive guard circuit and light fixture Download PDFInfo
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- CN103369768B CN103369768B CN201210093001.6A CN201210093001A CN103369768B CN 103369768 B CN103369768 B CN 103369768B CN 201210093001 A CN201210093001 A CN 201210093001A CN 103369768 B CN103369768 B CN 103369768B
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Abstract
The present invention is applicable to illumination circuit field, particularly relates to a kind of lamp temperatures adaptive guard circuit and light fixture.In embodiments of the present invention; lamp temperatures adaptive guard circuit is jointing temp detection circuit and lamp power outputs control circuit respectively; by receiving the signal that temperature detection circuit sends; lamp temperatures adaptive guard circuit judges lamp outer casing too high or too low for temperature; and control lamp power outputs control circuit, make its power output controlling light fixture do self-adaptative adjustment with skin temperature.
Description
Technical field
The invention belongs to illumination circuit field, particularly relate to a kind of lamp temperatures adaptive guard circuit and light fixture.
Background technology
Light fixture is widely used in the middle of daily life as a kind of electric equipment products of routine.
After the general light fixture operating time is long, the temperature of its shell all can raise, and the temperature of lamp outer casing is relevant with the power output of light fixture, and power output is larger, and the temperature of lamp outer casing is higher.
Generally, the power output of light fixture is constant, but in some applications, because the light fixture operating time is oversize, after causing skin temperature too high, can produce potential safety hazard, this just needs the power output of light fixture can do self-adaptative adjustment with skin temperature, but does not also have a kind of power output of light fixture can do self-adaptative adjustment with temperature at present.
Summary of the invention
The object of the present invention is to provide a kind of lamp temperatures adaptive guard circuit; being intended to solve does not have a kind of power output of light fixture can do self-adaptative adjustment with temperature now; cause the light fixture operating time oversize, after skin temperature is too high, the problem of potential safety hazard can be produced.
The present invention is achieved in that a kind of lamp temperatures adaptive guard circuit, connects the temperature detection circuit for detecting lamp temperatures and the lamp power outputs control circuit for controlling lamp power outputs respectively, and described lamp temperatures adaptive guard circuit comprises:
Pressurizer Z1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1, photoelectrical coupler U1 and switching tube;
The negative electrode of described pressurizer Z1 connects described temperature detection circuit, between the anode that described resistance R1 and resistance R2 is serially connected in described pressurizer Z1 and ground, the anode of the luminous tube of described photoelectrical coupler U1 and negative electrode connect the two ends of described resistance R1 respectively, the collector electrode of the triode of described photoelectrical coupler U1 connects the first end of described resistance R3, second termination power of described resistance R3, second termination power of described resistance R6, the hot end of switching tube described in first termination of described resistance R6, the emitter of the triode of described photoelectrical coupler U1 connects the control end of described switching tube by described resistance R5, between the emitter that described resistance R4 is connected to the triode of described photoelectrical coupler U1 and ground, between the control end that described electric capacity C1 is connected to described switching tube and ground, the cold end of described switching tube connects described lamp power outputs control circuit by described resistance R7.
Another object of the present invention is to provide a kind of light fixture; comprise the temperature detection circuit for detecting lamp temperatures and the lamp power outputs control circuit for controlling lamp power outputs; and the lamp temperatures adaptive guard circuit of difference jointing temp detection circuit and lamp power outputs control circuit, described lamp temperatures adaptive guard circuit comprises:
Pressurizer Z1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1, photoelectrical coupler U1 and switching tube;
The negative electrode of described pressurizer Z1 connects described temperature detection circuit, between the anode that described resistance R1 and resistance R2 is serially connected in described pressurizer Z1 and ground, the anode of the luminous tube of described photoelectrical coupler U1 and negative electrode connect the two ends of described resistance R1 respectively, the collector electrode of the triode of described photoelectrical coupler U1 connects the first end of described resistance R3, second termination power of described resistance R3, second termination power of described resistance R6, the hot end of switching tube described in first termination of described resistance R6, the emitter of the triode of described photoelectrical coupler U1 connects the control end of described switching tube by described resistance R5, between the emitter that described resistance R4 is connected to the triode of described photoelectrical coupler U1 and ground, between the control end that described electric capacity C1 is connected to described switching tube and ground, the cold end of described switching tube connects described lamp power outputs control circuit by described resistance R7.
In the present invention; lamp temperatures adaptive guard circuit is jointing temp detection circuit and lamp power outputs control circuit respectively; by receiving the signal that temperature detection circuit sends; lamp temperatures adaptive guard circuit judges lamp outer casing too high or too low for temperature; and control lamp power outputs control circuit, make its power output controlling light fixture do self-adaptative adjustment with skin temperature.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the lamp temperatures adaptive guard circuit that first embodiment of the invention provides;
Fig. 2 is the circuit structure diagram of the lamp temperatures adaptive guard circuit that second embodiment of the invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows the circuit structure of the lamp temperatures adaptive guard circuit that first embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows:
A kind of lamp temperatures adaptive guard circuit 300; connect the temperature detection circuit 100 for detecting lamp temperatures and the lamp power outputs control circuit 200 for controlling lamp power outputs respectively; lamp power outputs control circuit 200 is by controlling the change of the resistance sizes of lamp circuit; thus control the size of lamp power outputs; in general; resistance becomes large; lamp power outputs diminishes; thus lamp outer casing temperature is reduced; and resistance decreasing; lamp power outputs becomes large, thus lamp outer casing temperature is raised.
Lamp temperatures adaptive guard circuit 300 comprises:
Pressurizer Z1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1, photoelectrical coupler U1 and switching tube 301;
The negative electrode jointing temp detection circuit 100 of pressurizer Z1, between the anode that resistance R1 and resistance R2 is serially connected in pressurizer Z1 and ground, the two ends of the anode of the luminous tube of photoelectrical coupler U1 and negative electrode difference connecting resistance R1, the first end of the collector electrode connecting resistance R3 of the triode of photoelectrical coupler U1, the second termination power Vcc of resistance R3, the second termination power Vcc of resistance R6, the hot end of the first termination switching tube 301 of resistance R6, the emitter of the triode of photoelectrical coupler U1 connects the control end of switching tube 301 by resistance R5, between the emitter that resistance R4 is connected to the triode of photoelectrical coupler U1 and ground, between the control end that electric capacity C1 is connected to switching tube 301 and ground, the cold end of switching tube 301 connects lamp power outputs control circuit 200 by resistance R7.
As one embodiment of the invention, switching tube 301 adopts NPN type triode Q1, the base stage of NPN type triode Q1 is the control end of switching tube 301, the first end of the collector electrode connecting resistance R6 of NPN type triode Q1, the emitter of NPN type triode Q1 connects lamp power outputs control circuit 200 by resistance R7.
Fig. 2 shows the circuit structure of the lamp temperatures adaptive guard circuit that second embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows:
As one embodiment of the invention, switching tube 301 adopts N-type metal-oxide-semiconductor Q2, the grid of N-type metal-oxide-semiconductor Q2 is the control end of switching tube 301, and the first end of the drain electrode connecting resistance R6 of N-type metal-oxide-semiconductor Q2, the source electrode of N-type metal-oxide-semiconductor Q2 connects lamp power outputs control circuit 200 by resistance R7.
Adopt NPN type triode Q1 for switching tube 301, the operation principle of lamp temperatures adaptive guard circuit 300 be described:
In the light fixture course of work, preset range is increased to over when temperature detection circuit 100 detects lamp outer casing temperature, namely output voltage Uo raises, voltage-stabiliser tube Z1 and photoelectrical coupler U1 conducting, NPN type triode Q1 base stage has driving voltage and conducting, and the emitter output voltage of NPN type triode Q1 raises, and the resistance that this output voltage can control lamp circuit becomes large, lamp power outputs is reduced, thus lamp outer casing temperature is reduced; When temperature detection circuit 100 output voltage Uo reduces, voltage-stabiliser tube Z1 not conducting, the emitter output voltage of NPN type triode Q1 reduces, and controls the resistance decreasing of lamp circuit, lamp power outputs is improved, thus lamp outer casing temperature is raised; The emitter output voltage stabilization of NPN type triode Q1 (depends on the voltage stabilizing value of voltage-stabiliser tube Z1) in certain scope.
The embodiment of the present invention also provides a kind of light fixture; comprise temperature detection circuit 100, lamp power outputs control circuit 200 and lamp temperatures adaptive guard circuit 300 as above, lamp temperatures adaptive guard circuit 300 is jointing temp detection circuit 100 and lamp power outputs control circuit 200 respectively.
In embodiments of the present invention; lamp temperatures adaptive guard circuit is jointing temp detection circuit and lamp power outputs control circuit respectively; by receiving the signal that temperature detection circuit sends; lamp temperatures adaptive guard circuit judges lamp outer casing too high or too low for temperature; and control lamp power outputs control circuit, make its power output controlling light fixture do self-adaptative adjustment with skin temperature.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a lamp temperatures adaptive guard circuit, connecing the temperature detection circuit for detecting lamp temperatures and the lamp power outputs control circuit for controlling lamp power outputs respectively, it is characterized in that, described lamp temperatures adaptive guard circuit comprises:
Pressurizer Z1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1, photoelectrical coupler U1 and switching tube;
The negative electrode of described pressurizer Z1 connects described temperature detection circuit, between the anode that described resistance R1 and resistance R2 is serially connected in described pressurizer Z1 and ground, the anode of the luminous tube of described photoelectrical coupler U1 and negative electrode connect the two ends of described resistance R1 respectively, the collector electrode of the triode of described photoelectrical coupler U1 connects the first end of described resistance R3, second termination power of described resistance R3, second termination power of described resistance R6, the hot end of switching tube described in first termination of described resistance R6, the emitter of the triode of described photoelectrical coupler U1 connects the control end of described switching tube by described resistance R5, between the emitter that described resistance R4 is connected to the triode of described photoelectrical coupler U1 and ground, between the control end that described electric capacity C1 is connected to described switching tube and ground, the cold end of described switching tube connects described lamp power outputs control circuit by described resistance R7,
In the light fixture course of work, preset range is increased to over when temperature detection circuit detects lamp outer casing temperature, namely output voltage Uo raises, voltage-stabiliser tube Z1 and photoelectrical coupler U1 conducting, the control end of described switching tube has driving voltage and conducting, and the cold end output voltage of described switching tube raises, and the resistance that this output voltage can control lamp circuit becomes large, lamp power outputs is reduced, thus lamp outer casing temperature is reduced; When temperature detection circuit output voltage Uo reduces, voltage-stabiliser tube Z1 not conducting, the cold end output voltage of described switching tube reduces, and controls the resistance decreasing of lamp circuit, lamp power outputs is improved, thus lamp outer casing temperature is raised; The cold end output voltage stabilization of described switching tube in certain scope, and depends on the voltage stabilizing value of voltage-stabiliser tube Z1.
2. lamp temperatures adaptive guard circuit as claimed in claim 1; it is characterized in that; described switching tube adopts NPN type triode Q1; the base stage of described NPN type triode Q1 is the control end of switching tube; the collector electrode of described NPN type triode Q1 connects the first end of described resistance R6, and the emitter of described NPN type triode Q1 connects described lamp power outputs control circuit by described resistance R7.
3. lamp temperatures adaptive guard circuit as claimed in claim 1; it is characterized in that; described switching tube adopts N-type metal-oxide-semiconductor Q2; the grid of described N-type metal-oxide-semiconductor Q2 is the control end of switching tube; the drain electrode of described N-type metal-oxide-semiconductor Q2 connects the first end of described resistance R6, and the source electrode of described N-type metal-oxide-semiconductor Q2 connects described lamp power outputs control circuit by described resistance R7.
4. a light fixture; comprise temperature detection circuit and lamp power outputs control circuit; and the temperature detection circuit connect respectively for detecting lamp temperatures and the lamp temperatures adaptive guard circuit for the lamp power outputs control circuit that controls lamp power outputs; it is characterized in that, described lamp temperatures adaptive guard circuit comprises:
Pressurizer Z1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1, photoelectrical coupler U1 and switching tube;
The negative electrode of described pressurizer Z1 connects described temperature detection circuit, between the anode that described resistance R1 and resistance R2 is serially connected in described pressurizer Z1 and ground, the anode of the luminous tube of described photoelectrical coupler U1 and negative electrode connect the two ends of described resistance R1 respectively, the collector electrode of the triode of described photoelectrical coupler U1 connects the first end of described resistance R3, second termination power of described resistance R3, second termination power of described resistance R6, the hot end of switching tube described in first termination of described resistance R6, the emitter of the triode of described photoelectrical coupler U1 connects the control end of described switching tube by described resistance R5, between the emitter that described resistance R4 is connected to the triode of described photoelectrical coupler U1 and ground, between the control end that described electric capacity C1 is connected to described switching tube and ground, the cold end of described switching tube connects described lamp power outputs control circuit by described resistance R7,
In the light fixture course of work, preset range is increased to over when temperature detection circuit detects lamp outer casing temperature, namely output voltage Uo raises, voltage-stabiliser tube Z1 and photoelectrical coupler U1 conducting, the control end of described switching tube has driving voltage and conducting, and the cold end output voltage of described switching tube raises, and the resistance that this output voltage can control lamp circuit becomes large, lamp power outputs is reduced, thus lamp outer casing temperature is reduced; When temperature detection circuit output voltage Uo reduces, voltage-stabiliser tube Z1 not conducting, the cold end output voltage of described switching tube reduces, and controls the resistance decreasing of lamp circuit, lamp power outputs is improved, thus lamp outer casing temperature is raised; The cold end output voltage stabilization of described switching tube in certain scope, and depends on the voltage stabilizing value of voltage-stabiliser tube Z1.
5. light fixture as claimed in claim 4, it is characterized in that, described switching tube adopts NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of switching tube, the collector electrode of described NPN type triode Q1 connects the first end of described resistance R6, and the emitter of described NPN type triode Q1 connects described lamp power outputs control circuit by described resistance R7.
6. light fixture as claimed in claim 4, it is characterized in that, described switching tube adopts N-type metal-oxide-semiconductor Q2, the grid of described N-type metal-oxide-semiconductor Q2 is the control end of switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q2 connects the first end of described resistance R6, and the source electrode of described N-type metal-oxide-semiconductor Q2 connects described lamp power outputs control circuit by described resistance R7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210093001.6A CN103369768B (en) | 2012-03-31 | 2012-03-31 | A kind of lamp temperatures adaptive guard circuit and light fixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210093001.6A CN103369768B (en) | 2012-03-31 | 2012-03-31 | A kind of lamp temperatures adaptive guard circuit and light fixture |
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| Publication Number | Publication Date |
|---|---|
| CN103369768A CN103369768A (en) | 2013-10-23 |
| CN103369768B true CN103369768B (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210093001.6A Expired - Fee Related CN103369768B (en) | 2012-03-31 | 2012-03-31 | A kind of lamp temperatures adaptive guard circuit and light fixture |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101401486A (en) * | 2006-02-03 | 2009-04-01 | 霍尼韦尔国际公司 | Temperature controlled LED array |
| CN201365363Y (en) * | 2009-03-04 | 2009-12-16 | 广州复旦奥特科技股份有限公司 | Intelligent led illuminating driver |
| CN201937894U (en) * | 2010-12-08 | 2011-08-17 | 西安福安创意咨询有限责任公司 | Light emitting diode (LED) lamp circuit |
| CN102231930A (en) * | 2011-07-27 | 2011-11-02 | 四川九洲光电科技股份有限公司 | Light-control digital interface circuit |
-
2012
- 2012-03-31 CN CN201210093001.6A patent/CN103369768B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101401486A (en) * | 2006-02-03 | 2009-04-01 | 霍尼韦尔国际公司 | Temperature controlled LED array |
| CN201365363Y (en) * | 2009-03-04 | 2009-12-16 | 广州复旦奥特科技股份有限公司 | Intelligent led illuminating driver |
| CN201937894U (en) * | 2010-12-08 | 2011-08-17 | 西安福安创意咨询有限责任公司 | Light emitting diode (LED) lamp circuit |
| CN102231930A (en) * | 2011-07-27 | 2011-11-02 | 四川九洲光电科技股份有限公司 | Light-control digital interface circuit |
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| CN103369768A (en) | 2013-10-23 |
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