CN211128273U - Large-scale lamps and lanterns excess temperature protection device and L ED lamps and lanterns - Google Patents
Large-scale lamps and lanterns excess temperature protection device and L ED lamps and lanterns Download PDFInfo
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- CN211128273U CN211128273U CN201922426702.7U CN201922426702U CN211128273U CN 211128273 U CN211128273 U CN 211128273U CN 201922426702 U CN201922426702 U CN 201922426702U CN 211128273 U CN211128273 U CN 211128273U
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- 241001465382 Physalis alkekengi Species 0.000 title description 17
- 238000005286 illumination Methods 0.000 claims description 17
- 230000005669 field effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
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Abstract
A large-scale lamp over-temperature protection device and a L ED lamp relate to the technical field of L ED lighting lamps and solve the technical defects that an existing L ED lamp over-temperature protection circuit is lack of flexibility and poor in control accuracy and cannot meet the over-temperature protection of a high-power lamp, an ordinary over-temperature protection circuit is directly turned off to output, the lamp cannot illuminate in a protection state, normal lighting application is affected and the like.
Description
Technical Field
The utility model relates to L ED illumination lamps and lanterns technical field especially involves the excess temperature protection circuit of large-scale L ED lamps and lanterns and improves the aspect.
Background
At present, three over-temperature protection circuits are available in the market, and the first is to directly turn off the output when the temperature reaches a set value, namely to turn off the lamp; the second is that when the temperature reaches the set value, the power is reduced by half, namely half bright; the third is to slowly decrease the power, i.e. dim, when the temperature reaches the set value. The three circuits are integrated in the power supply and are widely applied to the lamps with medium and small power below 20W, and the lamps with large power above 20W are generally separated from the power supply, so that the over-temperature protection circuits in the three modes cannot accurately detect and protect the lamps from abnormal work due to overhigh temperature in severe environment, and cannot meet the over-temperature protection application of the high-power lamps.
Disclosure of Invention
To sum up, the utility model discloses an aim at solve current L ED lamps and lanterns excess temperature protection circuit existence and lack the flexibility, the control precision is poor, can not satisfy high-power lamps and lanterns excess temperature protection, and ordinary excess temperature protection circuit is the direct output of turn-offs, and lamps and lanterns can not throw light on under the protection state, and it is not enough to influence techniques such as normal illumination application, and provide a large-scale lamps and lanterns excess temperature protection device and L ED lamps and lanterns.
For solving the technical problem the utility model provides a technical scheme does:
the over-temperature protection device for the large lamp is characterized by comprising: the switch short circuit, the temperature control circuit and the constant voltage power supply circuit; wherein:
the switch short circuit is used for being connected with more than one L ED lamps in the L ED lamp lighting modules in series in parallel and controlling short circuit of a part L ED lamps in the L ED lamp lighting modules in series;
the temperature control circuit is used for sensing the temperature in the L ED lamp lighting module and controlling the on/off of the switch short circuit;
and the constant voltage power supply circuit is used for providing a working power supply for the temperature control circuit.
As to the technical scheme of the utility model for further limiting includes:
the switch short circuit is a field effect transistor switch circuit driven by the temperature control circuit to be conducted.
The temperature control circuit comprises a temperature sensor for sensing the temperature of the L ED lamp lighting module and a triode control circuit which is driven by the resistance value change of the temperature sensor to control the switch short circuit to be switched on or switched off.
The constant voltage power supply circuit is connected in parallel with the temperature control circuit through a voltage stabilizing diode.
An L ED lamp comprises a L ED lamp illumination module with more than two L ED lamps connected in series, and a L ED driving power supply for providing constant current for the L ED lamp illumination module, and is characterized by further comprising more than one group of lamp over-temperature protection devices, wherein a switch short circuit of each lamp over-temperature protection device is connected with more than one L ED lamp in the L ED lamp illumination module in parallel, a temperature sensor of a temperature control circuit is arranged on a light source board of the L ED lamp illumination module, and a constant voltage power supply circuit of each lamp over-temperature protection device is connected with the L ED lamp illumination module to take electricity.
The beneficial effects of the utility model are that the utility model discloses an excess temperature protection circuit uses on the light source board, after the temperature reached the setting value, will parallelly connected L ED lamp short circuit through switch short circuit, makes the work of temporary stop of part L ED lamp on the light source board, and temperature control is accurate, and the temperature reduction automatic recovery has realized low cost, and little volume uses in a flexible way, is particularly useful for large-scale lamps and lanterns excess temperature protection.
Drawings
Fig. 1 is a schematic diagram of the circuit principle of the present invention;
fig. 2 is a schematic circuit diagram according to another embodiment of the present invention.
Detailed Description
The structure of the present invention will be further described with reference to the accompanying drawings and preferred embodiments of the present invention.
Combine the specific circuit schematic diagram that shows in fig. 1, the utility model discloses large-scale lamps and lanterns excess temperature protection device, including: the switch short circuit, the temperature control circuit and the constant voltage power supply circuit; wherein:
the switch short circuit is used for being connected with more than one L ED lamp in L ED lamp lighting modules in series in parallel and controlling short circuit of a part L1 ED lamp in L0 ED lamp lighting modules in series, and the switch short circuit can be a field effect tube switch circuit driven by a temperature control circuit to be conducted, for example, four L2 ED lamps L3 ED1, L4 ED2, L ED3 and L ED4 are connected in series to form a L ED lamp lighting module, a field effect tube Q4 forming the field effect tube switch circuit is connected with one L ED2 in parallel, when the field effect tube Q4 is connected, the L ED2 is extinguished in a short circuit mode by a field effect tube Q4, the L ED lamp lighting modules are powered by a constant-current L ED driving power supply, and after L ED2 is extinguished, the power of the whole lamp is correspondingly reduced, and the heating value is correspondingly reduced, so that an over-temperature protection effect is achieved.
The temperature control circuit is used for sensing the temperature in a light source board of the L ED lamp lighting module and controlling the on-off of a switch short circuit, the temperature control circuit comprises a temperature sensor RT1 for sensing the temperature of the L ED lamp lighting module and a triode control circuit which is driven by the resistance value change of the temperature sensor to control the on-off of the switch short circuit, the triode control circuit can adopt a two-stage control circuit consisting of a triode Q5 and a triode Q3 to work normally, when the temperature sensor RT1 does not reach the design temperature, the resistance value of the temperature sensor RT1 is relatively large, the triode Q5 and the triode Q3 are not biased to be cut off, the field effect transistor Q4 also has no on-off voltage, the triode Q is in an off state, the L2 lamp is on, the over-temperature protection circuit is over-temperature, when the temperature rises to the design temperature, the resistance value of the temperature sensor RT1 is firstly turned on, the triode Q9 is turned on, the triode Q6862 is turned on and then provides a lower bias for the triode Q3, so that the triode Q3 is turned on, after the triode Q3 is turned on, the triode Q3 is turned on, the triode Q L is turned on, the gate of the triode Q L is provided with a stable control circuit which plays a role of controlling the switching on or a retarding circuit which is further comprises a L and a stable circuit which is used for controlling the switching on or switching off.
The constant voltage power supply circuit is used for providing a working power supply for the temperature control circuit; the constant voltage power supply circuit is connected in parallel with the temperature control circuit through a voltage stabilizing diode. Specifically, the resistor R1, the resistor R2, the transistor Q1, the transistor Q2, and the zener diode ZD1 form the constant voltage power supply circuit, and the constant voltage power supply circuit is supplied with a constant operating voltage by the zener diode ZD 1.
The utility model discloses an L ED lamps and lanterns, including the L ED lamp illumination module of two above L ED lamp series connection to and for the L ED drive power supply that L ED lamp illumination module provided the constant current, still including a set of above lamps and lanterns overtemperature prote device, lamps and lanterns overtemperature prote device's switch short circuit and L ED lamp illumination module more than one L ED lamp are parallelly connected in parallel, temperature control circuit's temperature sensor locate on the light source board of L ED lamp illumination module, lamps and lanterns overtemperature prote device's constant voltage power supply circuit and L ED lamp illumination module be connected and get the electricity.
Referring to fig. 2, when the number of L ED lamps connected in series to a group of L ED lamp lighting modules is large, a plurality of lamp over-temperature protection devices are adopted to connect different L ED lamps in parallel, and corresponding L ED lamps are controlled to be extinguished according to temperature change values at different positions, so that the power of the whole lamp is correspondingly reduced, the heat productivity is correspondingly reduced, and an over-temperature protection effect is achieved.
Claims (5)
1. The over-temperature protection device for the large lamp is characterized by comprising: the switch short circuit, the temperature control circuit and the constant voltage power supply circuit; wherein:
the switch short circuit is used for being connected with more than one L ED lamps in the L ED lamp lighting modules in series in parallel and controlling short circuit of a part L ED lamps in the L ED lamp lighting modules in series;
the temperature control circuit is used for sensing the temperature in the L ED lamp lighting module and controlling the on/off of the switch short circuit;
and the constant voltage power supply circuit is used for providing a working power supply for the temperature control circuit.
2. The large-scale lamp over-temperature protection device according to claim 1, wherein: the switch short circuit is a field effect transistor switch circuit driven by the temperature control circuit to be conducted.
3. The over-temperature protection device for the large-scale lamp according to claim 1, wherein the temperature control circuit comprises a temperature sensor for sensing the temperature of the L ED lamp lighting module and a triode control circuit for driving the switch short circuit to be switched on or off under the change of the resistance value of the temperature sensor.
4. The large-scale lamp over-temperature protection device according to claim 1, wherein: the constant voltage power supply circuit is connected in parallel with the temperature control circuit through a voltage stabilizing diode.
5. An L ED lamp comprises a L ED lamp illumination module with more than two L ED lamps connected in series, and a L ED driving power supply for supplying constant current to the L ED lamp illumination module, and is characterized by further comprising a group of lamp over-temperature protection devices according to any one of claims 1 to 4, wherein a switch short circuit of each lamp over-temperature protection device is connected with more than one L ED lamp in the L ED lamp illumination module in parallel, a temperature sensor of the temperature control circuit is arranged on a light source board of the L ED lamp illumination module, and a constant voltage power supply circuit of each lamp over-temperature protection device is connected with the L ED lamp illumination module to obtain electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426702.7U CN211128273U (en) | 2019-12-30 | 2019-12-30 | Large-scale lamps and lanterns excess temperature protection device and L ED lamps and lanterns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426702.7U CN211128273U (en) | 2019-12-30 | 2019-12-30 | Large-scale lamps and lanterns excess temperature protection device and L ED lamps and lanterns |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211128273U true CN211128273U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922426702.7U Active CN211128273U (en) | 2019-12-30 | 2019-12-30 | Large-scale lamps and lanterns excess temperature protection device and L ED lamps and lanterns |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211128273U (en) |
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2019
- 2019-12-30 CN CN201922426702.7U patent/CN211128273U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Building A, B, C, and D, Industrial Park, No. 10 Huanping Road, Gaoqiao Community, Pingdi Street, Longgang District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Yufu Lighting Co.,Ltd. Country or region after: China Address before: 518000 buildings a, B, C and D, No.10 huanping Road, Gaoqiao community, Pingdi street, Longgang District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Eastfield Lighting Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |