CN211356984U - Cold cathode ultraviolet lamp control and detection circuit - Google Patents
Cold cathode ultraviolet lamp control and detection circuit Download PDFInfo
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- CN211356984U CN211356984U CN201922027658.2U CN201922027658U CN211356984U CN 211356984 U CN211356984 U CN 211356984U CN 201922027658 U CN201922027658 U CN 201922027658U CN 211356984 U CN211356984 U CN 211356984U
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Abstract
The utility model discloses a cold cathode ultraviolet lamp control and detection circuit, which comprises a control circuit and a detection circuit; the control circuit comprises a main controller, the control end of the main controller is connected with the input end of the optical coupler, two output ends of the optical coupler are electrically connected with a T2 pole, a G pole and a T1 pole of the bidirectional thyristor, the ultraviolet lamp is connected between the live wire and the zero wire, and the bidirectional thyristor is connected in series in the live wire to control the on-off of the live wire; the detection circuit comprises a current transformer for acquiring a current signal of a working main loop of the ultraviolet lamp, and the output end of the current transformer is connected with the acquisition end of the main controller after being sequentially connected with a rectifying circuit, a filtering circuit and a voltage division circuit; the main controller judges whether the ultraviolet lamp is in a normal working state according to the voltage signal acquired by the acquisition end. Whether this case can be controlled and whether be in normal operating condition to cold cathode ultraviolet lamp work and carry out real-time supervision, and the monitoring rate of accuracy is high, circuit structure is simple, the cost of manufacture is low.
Description
Technical Field
The utility model relates to a control circuit especially relates to a cold cathode ultraviolet lamp control and detection circuitry.
Background
With the increasing air quality pollution and air dust, more and more families, schools, enterprises and public institutions and the like pay more and more attention to the improvement of indoor air quality, and the function of air purification equipment becomes more and more important. The sterilization and disinfection of air in the purification equipment are very important. In the purification equipment, a cold cathode ultraviolet lamp is usually adopted for air sterilization and disinfection, but if an effective monitoring means is lacked, the problem or fault cannot be found in time if the cold cathode ultraviolet lamp is continuously kept in a normal working state, so that the sterilization effect is greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cold cathode ultraviolet lamp control and detection circuitry, it can be to whether the cold cathode ultraviolet lamp works and control and whether be in normal operating condition and carry out real-time supervision.
The utility model provides a technical scheme that its technical problem adopted is:
a cold cathode ultraviolet lamp control and detection circuit comprises a control circuit and a detection circuit;
the control circuit comprises a main controller, wherein one control end of the main controller is connected with the input end of an optical coupler after being connected with a first resistor, one main output end of the optical coupler is electrically connected with a T2 pole of a bidirectional controllable silicon after being connected with a second resistor, the other main output end of the optical coupler is electrically connected with a G pole of the bidirectional controllable silicon and is also electrically connected with a T1 pole of the bidirectional controllable silicon after being connected with a third resistor, an ultraviolet lamp is connected between a live wire and a zero wire, and the bidirectional controllable silicon is connected in series in the live wire to control the on-off of the live wire, so that whether the ultraviolet lamp works or;
the detection circuit comprises a current transformer for acquiring a current signal of a working main loop of the ultraviolet lamp, wherein the output end of the current transformer is connected with the acquisition end of the main controller after being sequentially connected with a rectifying circuit, a filter circuit and a voltage division circuit; the main controller judges whether the ultraviolet lamp is in a normal working state according to the voltage signal acquired by the acquisition end.
In one embodiment: the rectifier circuit comprises a rectifier diode, and half-wave rectification is realized through the rectifier diode.
In one embodiment: the filter circuit comprises a first capacitor and a second capacitor which are connected in parallel.
In one embodiment: the voltage division circuit comprises a first voltage division resistor and a second voltage division resistor which are connected in series.
In one embodiment: the live wire is connected with a thermistor in series.
In one embodiment: the optical coupler is an optical coupler with the model number MOC 3041.
Compared with the background technology, the technical scheme has the following advantages:
whether can whether work to cold cathode ultraviolet lamp controls and whether be in normal operating condition and carry out real-time supervision, and the monitoring rate of accuracy is high, circuit structure is simple, the cost of manufacture is low.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic diagram of a cold cathode uv lamp control and detection circuit.
Detailed Description
Referring to fig. 1, a cold cathode ultraviolet lamp control and detection circuit includes a control circuit and a detection circuit;
the control circuit comprises a main controller 1, wherein one control end of the main controller 1 is connected with the input end of an optical coupler 3 after being connected with a first resistor 2, one main output end of the optical coupler 3 is electrically connected with a T2 pole of a bidirectional controllable silicon 5 after being connected with a second resistor 4, the other main output end of the optical coupler 3 is electrically connected with a G pole of the bidirectional controllable silicon 5 and is also electrically connected with a T1 pole of the bidirectional controllable silicon 5 after being connected with a third resistor 6, an ultraviolet lamp 7 is connected between a live wire and a zero wire, and the bidirectional controllable silicon 5 is connected in series in the live wire to control the on-off of the live wire, so that whether the ultraviolet lamp 7 works;
the detection circuit comprises a current transformer 8 for acquiring a current signal of an ultraviolet lamp working main loop (namely a zero-live line power supply loop for supplying power to an ultraviolet lamp), wherein the output end of the current transformer 8 is connected with the acquisition end of the main controller 1 after being sequentially connected with a rectifying circuit, a filter circuit and a voltage division circuit;
in this embodiment, the rectifier circuit includes a rectifier diode 9, half-wave rectification is realized through the rectifier diode, and ac/dc conversion is realized, the filter circuit includes a first capacitor 10 and a second capacitor 11 connected in parallel, the voltage divider circuit includes a first voltage divider resistor 12 and a second voltage divider resistor 13 connected in series, and the acquisition end of the main controller acquires dc voltage division on the second voltage divider resistor 13.
Preferably, a thermistor 14 is connected in series to the live line for short circuit protection. In this embodiment, the optical coupler 3 is an optical coupler of MOC3041, and the bidirectional thyristor 5 is a patch thyristor BT 134.
The main controller 1 judges whether the ultraviolet lamp 7 is in a normal working state according to the voltage signal (direct current voltage division on the second resistor) collected by the collecting end. The specific judgment method comprises the following steps: and a judgment threshold value is set, once the ultraviolet lamp 7 fails and does not work, the voltage value acquired by the acquisition end of the main controller 1 is greatly smaller than the acquisition value during normal work, and therefore when the voltage acquired by the main controller 1 is smaller than the judgment threshold value, the ultraviolet lamp 7 is in an abnormal working state, and the failure can occur. The determination method is a simple size comparison method, which is a method known in the prior art.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (6)
1. A cold cathode ultraviolet lamp control and detection circuit is characterized in that: comprises a control circuit and a detection circuit;
the control circuit comprises a main controller, wherein one control end of the main controller is connected with the input end of an optical coupler after being connected with a first resistor, one main output end of the optical coupler is electrically connected with a T2 pole of a bidirectional controllable silicon after being connected with a second resistor, the other main output end of the optical coupler is electrically connected with a G pole of the bidirectional controllable silicon and is also electrically connected with a T1 pole of the bidirectional controllable silicon after being connected with a third resistor, an ultraviolet lamp is connected between a live wire and a zero wire, and the bidirectional controllable silicon is connected in series in the live wire to control the on-off of the live wire, so that whether the ultraviolet lamp works or;
the detection circuit comprises a current transformer for acquiring a current signal of a working main loop of the ultraviolet lamp, wherein the output end of the current transformer is connected with the acquisition end of the main controller after being sequentially connected with a rectifying circuit, a filter circuit and a voltage division circuit; the main controller judges whether the ultraviolet lamp is in a normal working state according to the voltage signal acquired by the acquisition end.
2. The control and detection circuit of claim 1, wherein: the rectifier circuit comprises a rectifier diode, and half-wave rectification is realized through the rectifier diode.
3. The control and detection circuit of claim 2, wherein: the filter circuit comprises a first capacitor and a second capacitor which are connected in parallel.
4. The control and detection circuit of claim 3, wherein: the voltage division circuit comprises a first voltage division resistor and a second voltage division resistor which are connected in series.
5. The control and detection circuit of claim 1, wherein: the live wire is connected with a thermistor in series.
6. The control and detection circuit of claim 1, wherein: the optical coupler is an optical coupler with the model number MOC 3041.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922027658.2U CN211356984U (en) | 2019-11-21 | 2019-11-21 | Cold cathode ultraviolet lamp control and detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922027658.2U CN211356984U (en) | 2019-11-21 | 2019-11-21 | Cold cathode ultraviolet lamp control and detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211356984U true CN211356984U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922027658.2U Active CN211356984U (en) | 2019-11-21 | 2019-11-21 | Cold cathode ultraviolet lamp control and detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211356984U (en) |
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2019
- 2019-11-21 CN CN201922027658.2U patent/CN211356984U/en active Active
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Address after: 363000 Malata 10 industrial park, JINDA Road, Jinfeng Development Zone, Zhangzhou, Fujian Patentee after: Zhangzhou Zhonghuan Technology Co.,Ltd. Address before: 363000 Malata 10 industrial park, JINDA Road, Jinfeng Development Zone, Zhangzhou, Fujian Patentee before: Zhangzhou Malata central Polytron Technologies Inc. |