CN201590934U - Ultraviolet lamp failure detection circuit and device - Google Patents
Ultraviolet lamp failure detection circuit and device Download PDFInfo
- Publication number
- CN201590934U CN201590934U CN2009202621330U CN200920262133U CN201590934U CN 201590934 U CN201590934 U CN 201590934U CN 2009202621330 U CN2009202621330 U CN 2009202621330U CN 200920262133 U CN200920262133 U CN 200920262133U CN 201590934 U CN201590934 U CN 201590934U
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- CN
- China
- Prior art keywords
- uviol lamp
- failure detector
- lamp failure
- detector circuit
- diode
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
An ultraviolet lamp failure detection circuit is connected between an ultraviolet lamp and a single chip microcomputer and outputs a detection signal to the single chip microcomputer, wherein, an input end of the ultraviolet lamp UVL is connected with a live line L of an AC power. The ultraviolet lamp failure detection circuit furthermore comprises a large-power cement resistor R1, a diode D1, a current limiting resistor R2 and an optical coupler OC1, wherein the cement resistor R1 is connected with the diode D1 in parallel. One common end of the cement resistor is connected between the ultraviolet lamp UVL and one end of the current limiting resistor R2. The common end of the other end of the cement resistor R1 which is connected with the diode D1 in parallel is connected with a null line N. The input end of the optical coupler OC1 is connected between the other end of the current limiting resistor R2 and the single chip microcomputer. The utility model further provides an ultraviolet lamp failure detection device. The ultraviolet lamp failure detection circuit and device provided by the utility model use a current detection circuit which is matched with the single chip microcomputer for realizing the detection to the failure of ultraviolet lamp.
Description
[technical field]
The utility model relates to a kind of failure detector circuit, relates in particular to a kind of uviol lamp failure detector circuit and device.
[background technology]
At present, uviol lamp is a kind ofly can send ultraviolet luminaire, is widely used in the bacterium virus killing equipment that disappears such as air sterilizing apparatus, how the fault of uviol lamp is detected, and becomes a problem that is worth thinking.
[utility model content]
The technical problems to be solved in the utility model provides a kind of uviol lamp failure detector circuit and device, uses current detection circuit to cooperate the detection of chip microcontroller to the uviol lamp fault.
The utility model provides a kind of uviol lamp failure detector circuit, be connected between uviol lamp and the single-chip microcomputer, output detection signal is to single-chip microcomputer, wherein, the input of uviol lamp UVL is connected in the live wire L of AC power, also comprise high-power cement resistor R1, diode D1, current-limiting resistance R2 and photoelectrical coupler OC1, wherein cement resistor R1 is in parallel with diode D1, one end common port is connected between the end of uviol lamp UVL and current-limiting resistance R2, this cement resistor R1 other end common port in parallel with diode D1 is connected in zero line N, and the input of photoelectrical coupler OC1 is connected between the other end and single-chip microcomputer of current-limiting resistance R2.
As further improvement of the utility model: described photoelectrical coupler OC1 comprises light-emitting diode D2 and photistor Q1, wherein the negative pole of Light-Emitting Diode D2 is connected in the zero line N of power supply, positive pole is connected in the other end of current-limiting resistance R2, the collector electrode output detection signal of photistor Q1, grounded emitter.
As further improvement of the utility model: also comprise resistance R 3, the one end is connected in the collector electrode of photistor Q1, and the other end is connected in supply power voltage VCC.
As further improvement of the utility model: also comprise resistance R 4, the one end is connected in the collector electrode of transistor Q1, other end output detection signal.
As further improvement of the utility model: also comprise capacitor C 1, an end of described capacitor C 1 is connected in the other end of resistance R 4, the other end ground connection of capacitor C 1.
The utility model also provides a kind of uviol lamp failure detector, comprises this uviol lamp failure detector circuit.
The beneficial effects of the utility model are: uviol lamp failure detector circuit provided by the utility model and device, use current detection circuit to cooperate the detection of chip microcontroller to the uviol lamp fault.
[description of drawings]
Fig. 1 is the circuit diagram of the utility model uviol lamp failure detector circuit;
Fig. 2 is the utility model uviol lamp failure detector circuit oscillogram of output waveform just often;
The oscillogram of output waveform when Fig. 3 is the utility model uviol lamp failure detector circuit fault.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and execution mode of the present utility model.
Be the circuit diagram of the utility model new ultra-violet lamp fault detection circuit as shown in Figure 1.This uviol lamp failure detector circuit is connected between uviol lamp UVL and the single-chip microcomputer (not shown), and output detection signal is to single-chip microcomputer.Comprise high-power cement resistor R1, diode D1, current-limiting resistance R2 and photoelectrical coupler OC1.The input of uviol lamp UVL is connected in the live wire L of AC power, cement resistor R1 is in parallel with diode D1, one end common port is connected between the end of uviol lamp UVL and current-limiting resistance R2, this cement resistor R1 other end common port in parallel with diode D1 is connected in zero line N, and the input of photoelectrical coupler OC1 is connected between the other end and single-chip microcomputer of current-limiting resistance R2.
In the present embodiment, high-power cement resistor R1 plays the voltage sampling in circuit, certain pressure drop is arranged during operate as normal; But between 10-50 ohm, less resistance can guarantee that photoelectrical coupler OC1 is operated in normal operating conditions according to the power value of uviol lamp UVL.Current-limiting resistance R2 plays metering function in circuit, prevent the excessive damage photoelectrical coupler of electric current OC1.
In the present embodiment, described photoelectrical coupler OC1 comprises light-emitting diode D2 and photistor Q1, and wherein the negative pole of Light-Emitting Diode D2 is connected in the zero line N of power supply, and positive pole is connected in the other end of current-limiting resistance R2, the collector electrode output detection signal of photistor Q1, grounded emitter.The positive pole of diode D1 is connected in the zero line N of power supply, and negative pole is connected in the output of uviol lamp UVL.
In the present embodiment, this uviol lamp failure detector circuit also comprises resistance R 3 and resistance R 4, and an end of resistance R 3 is connected in the collector electrode of photistor Q1, and the other end is connected in supply power voltage VCC.One end of resistance R 4 is connected in the collector electrode of transistor Q1, other end output detection signal.
In the present embodiment, this uviol lamp failure detector circuit also comprises capacitor C 1, and an end of described capacitor C 1 is connected in the other end of resistance R 4, the other end ground connection of capacitor C 1.
The utility model also provides a kind of uviol lamp failure detector, and the utility model provides uviol lamp failure detector circuit and device can also be applied to fluorescent lamp.
Seeing also Fig. 2 is the uviol lamp failure detector circuit oscillogram of output waveform just often.During uviol lamp UVL operate as normal: when the positive half cycle of alternating current, because high-power cement resistor R1 is connected in the circuit, can produce certain pressure drop at high-power cement resistor R1 two ends, this pressure drop lights the light-emitting diode D2 among the photoelectrical coupler OC1 through the current conversion of current-limiting resistance R2, makes the signal output low level; When the alternating current negative half period, be connected in parallel on the diode D1 conducting at high-power cement resistor R1 two ends, because of this pressure drop very low (about 0.7V), the light-emitting diodes D2 pipe among the photoelectrical coupler OC1 is lighted, so signal output high level; Circulate with this, promptly when the uviol lamp operate as normal, the output signal of signal output part is the consecutive pulses signal, by detection and the software processes of single-chip microcomputer to signal output, judges that uviol lamp is in normal operating conditions.
The oscillogram of output waveform when seeing also Fig. 3 for uviol lamp failure detector circuit fault.When uviol lamp UVL fault, because do not have electric current in the high-power cement resistor R1 loop, photoelectrical coupler OC1 can not conducting, and signal continues output high level (VCC voltage).By detection and the software processes of single-chip microcomputer, judge that uviol lamp is in the fail operation state to signal output.
Uviol lamp failure detector circuit provided by the utility model and device use current detection circuit to cooperate the detection of chip microcontroller to the uviol lamp fault.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (8)
1. uviol lamp failure detector circuit, be connected between uviol lamp and the single-chip microcomputer, output detection signal is to single-chip microcomputer, wherein, the input of uviol lamp UVL is connected in the live wire L of AC power, it is characterized in that: also comprise high-power cement resistor R1, diode D1, current-limiting resistance R2 and photoelectrical coupler OC1, wherein cement resistor R1 is in parallel with diode D1, one end common port is connected between the end of uviol lamp UVL and current-limiting resistance R2, this cement resistor R1 other end common port in parallel with diode D1 is connected in zero line N, and the input of photoelectrical coupler OC1 is connected between the other end and described single-chip microcomputer of described current-limiting resistance R2.
2. uviol lamp failure detector circuit according to claim 1, it is characterized in that: described photoelectrical coupler OC1 comprises light-emitting diode D2 and photistor Q1, wherein the negative pole of Light-Emitting Diode D2 is connected in the zero line N of power supply, positive pole is connected in the other end of current-limiting resistance R2, the collector electrode output detection signal of photistor Q1, grounded emitter.
3. uviol lamp failure detector circuit according to claim 1 is characterized in that: the positive pole of diode D1 is connected in the zero line N of power supply, and negative pole is connected in the output of uviol lamp UVL.
4. according to claim 2 or 3 described uviol lamp failure detector circuits, it is characterized in that: also comprise resistance R 3, the one end is connected in the collector electrode of photistor Q1, and the other end is connected in supply power voltage VCC.
5. uviol lamp failure detector circuit according to claim 4 is characterized in that: also comprise resistance R 4, the one end is connected in the collector electrode of transistor Q1, other end output detection signal.
6. uviol lamp failure detector circuit according to claim 5 is characterized in that: also comprise capacitor C 1, an end of described capacitor C 1 is connected in the other end of resistance R 4, the other end ground connection of capacitor C 1.
7. uviol lamp failure detector circuit according to claim 6 is characterized in that: can also be applied to fluorescent lamp.
8. a uviol lamp failure detector is characterized in that: comprise that claim 1 is to each described uviol lamp failure detector circuit of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202621330U CN201590934U (en) | 2009-12-25 | 2009-12-25 | Ultraviolet lamp failure detection circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202621330U CN201590934U (en) | 2009-12-25 | 2009-12-25 | Ultraviolet lamp failure detection circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201590934U true CN201590934U (en) | 2010-09-22 |
Family
ID=42750729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202621330U Expired - Fee Related CN201590934U (en) | 2009-12-25 | 2009-12-25 | Ultraviolet lamp failure detection circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201590934U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944718A (en) * | 2012-11-15 | 2013-02-27 | 无锡中亚工具厂 | Current sampler |
| CN102967749A (en) * | 2012-11-15 | 2013-03-13 | 无锡中亚工具厂 | Current sampler with amplifying circuit |
| CN112731197A (en) * | 2020-12-19 | 2021-04-30 | 珠海格力电器股份有限公司 | Fault detection method and device for ultraviolet lamp of water purifier, water purifier and storage medium |
-
2009
- 2009-12-25 CN CN2009202621330U patent/CN201590934U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944718A (en) * | 2012-11-15 | 2013-02-27 | 无锡中亚工具厂 | Current sampler |
| CN102967749A (en) * | 2012-11-15 | 2013-03-13 | 无锡中亚工具厂 | Current sampler with amplifying circuit |
| CN112731197A (en) * | 2020-12-19 | 2021-04-30 | 珠海格力电器股份有限公司 | Fault detection method and device for ultraviolet lamp of water purifier, water purifier and storage medium |
| CN112731197B (en) * | 2020-12-19 | 2022-03-29 | 珠海格力电器股份有限公司 | Fault detection method and device for ultraviolet lamp of water purifier, water purifier and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20171225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |