Bactericidal lamp and fault detection circuit thereof

Abstract

The utility model discloses a germicidal lamp and a fault detection circuit thereof, and the fault detection circuit is connected in series with a working loop of the germicidal lamp and is used for outputting a detection signal according to the working state of the germicidal lamp. The fault detection circuit at least comprises a detection unit and an output unit, the detection unit is used for generating a voltage division signal when the germicidal lamp works normally, and otherwise, the detection unit does not generate the voltage division signal; and the output unit is used for outputting a detection signal according to the voltage division signal of the detection unit to indicate whether the germicidal lamp fails or not. According to the utility model, the fault detection circuit is connected in series with the working loop of the germicidal lamp, detection signals are output through voltage division of the diodes, and the circuit has the advantages of simple structure, low cost, accurate detection results and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of fault detection, in particular to a germicidal lamp and its fault detection circuit. Background Art

[0002] As a commonly used physical disinfection and sterilization device, germicidal lamps are widely used in the fields of medical and health, food processing, water treatment, etc. In the application of ultraviolet germicidal lamps (UVC lamps), it is crucial to understand their working status in real time to ensure the disinfection effect. Since ultraviolet rays have potential harmful effects on the human body, it is necessary to know whether the germicidal lamp is in a normal working state without being exposed to ultraviolet rays in the disinfection field. The existing fault monitoring of germicidal lamps usually uses a current transformer to detect the loop current of the germicidal lamp, which has problems such as complex measurement and unstable operation.

[0003] Therefore, in view of the defects of the existing technology, it is necessary to propose a technical solution to solve the technical problems existing in the existing technology. Summary of the Utility Model

[0004] In view of this, it is necessary to provide a germicidal lamp and its fault detection circuit. The fault detection circuit is connected in series in the working circuit of the germicidal lamp, and the detection signal is output through diode voltage division, which has the advantages of simple structure, low cost and accurate detection results.

[0005] In order to solve the technical problems existing in the existing technology, the technical solution of the utility model is as follows:

[0006] A fault detection circuit for a germicidal lamp, which is connected in series in the working circuit of the germicidal lamp and is used to output a detection signal according to the working state of the germicidal lamp;

[0007] The fault detection circuit at least includes a detection unit and an output unit. Among them, the detection unit is used to generate a voltage division signal when the germicidal lamp is working normally, otherwise it does not generate a voltage division signal;

[0008] The output unit is used to output a detection signal according to the voltage division signal of the detection unit to indicate whether the germicidal lamp is faulty.

[0009] As a further improvement, the detection unit uses multiple diodes connected in series to output a voltage division signal with a suitable voltage value.

[0010] As a further improvement, the output unit uses a light-emitting diode. When the detection unit generates a voltage division signal, the light-emitting diode lights up, otherwise, the light-emitting diode does not light up.

[0011] As a further improvement, the output unit uses an optocoupler. The input end of the optocoupler is connected to the voltage division signal, and the output end of the optocoupler outputs a detection signal.

[0012] As a further improvement, the detection unit uses 4 diodes in series to output a voltage-dividing signal to drive an optocoupler.

[0013] As a further improvement, the detection unit includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first resistor R1, a second resistor R2, and a first capacitor C1. Among them, the AC input L terminal is connected to the negative electrode of the first diode D1, the positive electrode of the second diode D2, one end of the first resistor R1, and one end of the second resistor R2. The negative electrode of the second diode D2 is connected to the positive electrode of the third diode D3. The negative electrode of the third diode D3 is connected to the positive electrode of the fourth diode D4. The negative electrode of the fourth diode D4 is connected to the positive electrode of the fifth diode D5. The negative electrode of the fifth diode D5 is connected to the positive electrode of the first diode D1, the other end of the first resistor R1, and one end of the first capacitor C1 and is connected to one end of the germicidal lamp power supply. The other end of the germicidal lamp power supply is connected to the AC input N terminal. The other end of the second resistor R2 is connected to the other end of the first capacitor C1, and a voltage-dividing signal is output across the two ends of the first capacitor C1.

[0014] The present utility model also discloses a germicidal lamp. A fault detection circuit is connected in series in the working circuit of the germicidal lamp. The fault detection circuit is used to output a detection signal according to the working state of the germicidal lamp to indicate whether the germicidal lamp is faulty.

[0015] The fault detection circuit at least includes a detection unit and an output unit. Among them, the detection unit is used to generate a voltage-dividing signal when the germicidal lamp is working properly, otherwise no voltage-dividing signal is generated.

[0016] The output unit is used to output a detection signal according to the voltage-dividing signal of the detection unit to indicate whether the germicidal lamp is faulty.

[0017] As a further improvement, the detection unit uses multiple diodes in series to output a voltage-dividing signal with a suitable voltage value.

[0018] As a further improvement, the output unit uses a light-emitting diode. When the detection unit generates a voltage-dividing signal, the light-emitting diode lights up, otherwise, the light-emitting diode does not light up.

[0019] As a further improvement, the output unit uses an optocoupler. The input end of the optocoupler is connected to the voltage-dividing signal, and the output end of the optocoupler outputs a detection signal.

[0020] Compared with the prior art, the utility model has the advantages of high reliability, fast real-time response, simple structure, low cost, stable and reliable detection effect, etc. By connecting the fault detection circuit in series in the working circuit of the germicidal lamp, detecting signals are output through diode voltage division, and prompts are sent in time when abnormalities are found. It can be widely used in the detection of the working state of ultraviolet germicidal lamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a schematic diagram of the principle of the germicidal lamp fault detection circuit of the utility model.

[0022] Figure 2 FIG. is a schematic diagram of the principle of the germicidal lamp fault detection circuit of the utility model.

[0023] The following specific embodiments will further illustrate the utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions provided by the utility model will be further described below in conjunction with the drawings.

[0025] See Figure 1 , which shows a schematic diagram of the principle of a germicidal lamp fault detection circuit of the utility model. The fault detection circuit is connected in series in the working circuit of the germicidal lamp and is used to output detection signals according to the working state of the germicidal lamp;

[0026] The fault detection circuit at least includes a detection unit and an output unit. Among them, the detection unit is used to generate a voltage division signal when the germicidal lamp is working normally, otherwise it does not generate a voltage division signal;

[0027] The output unit is used to output a detection signal according to the voltage division signal of the detection unit to indicate whether the germicidal lamp is faulty.

[0028] In the above technical solution, the detection unit uses multiple diodes connected in series to output a voltage division signal with a suitable voltage value. The working circuit of the germicidal lamp is powered by alternating current. When the germicidal lamp is working normally, a working current will be generated in the circuit. Multiple diodes connected in series in the detection unit generate voltage division. The voltage division of one diode is about 0.7V, and a suitable voltage division value is output by changing the number of diodes connected in series; when the germicidal lamp fails, there is no working current in the circuit, and the diodes do not generate voltage division.

[0029] In a preferred embodiment, the output unit uses a light-emitting diode. When the detection unit generates a voltage division signal, the light-emitting diode lights up, otherwise, the light-emitting diode does not light up.

[0030] In a preferred embodiment, the output unit uses an optocoupler. The input end of the optocoupler is connected to the voltage-dividing signal, and the output end of the optocoupler outputs the detection signal. Further, the detection unit uses 4 diodes connected in series to generate a voltage division of approximately 2.8V, thereby ensuring that the output voltage-dividing signal is sufficient to drive the optocoupler.

[0031] See Figure 2 , which shows the circuit schematic diagram of the fault detection circuit of the germicidal lamp of the present invention. The detection unit includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first resistor R1, a second resistor R2, and a first capacitor C1. Among them, the detection unit and the germicidal lamp are connected in series in the AC input loop. The second diode D2, the third diode D3, the fourth diode D4, and the fifth diode D5 are connected in series in sequence to generate a voltage-dividing signal. The first diode D1 is used to ensure the operation of the loop during the negative half cycle of the AC. In a preferred embodiment, the voltage-dividing signal is connected to the input end of the optocoupler. The optocoupler converts the signal through electro-optical conversion and outputs the detection signal, so that the subsequent single-chip microcomputer can obtain the detection signal. The single-chip microcomputer judges whether there is current in the germicidal lamp by detecting the level change of the signal output by the optocoupler, and then knows whether the germicidal lamp is still in a normal working state, improving the accuracy of the detection result. The specific circuit connection is as follows:

[0032] The AC input L terminal is connected to the negative electrode of the first diode D1, the positive electrode of the second diode D2, one end of the first resistor R1, and one end of the second resistor R2. The negative electrode of the second diode D2 is connected to the positive electrode of the third diode D3. The negative electrode of the third diode D3 is connected to the positive electrode of the fourth diode D4. The negative electrode of the fourth diode D4 is connected to the positive electrode of the fifth diode D5. The negative electrode of the fifth diode D5 is connected to the positive electrode of the first diode D1, the other end of the first resistor R1, one end of the first capacitor C1, and is connected to one end of the germicidal lamp power supply. The other end of the germicidal lamp power supply is connected to the AC input N terminal; the other end of the second resistor R2 is connected to the other end of the first capacitor C1, and the voltage-dividing signal is output at both ends of the first capacitor C1.

[0033] The present invention also discloses a germicidal lamp. A fault detection circuit is connected in series in the working circuit of the germicidal lamp. The fault detection circuit is used to output a detection signal according to the working state of the germicidal lamp to indicate whether the germicidal lamp is faulty;

[0034] The fault detection circuit at least includes a detection unit and an output unit. Among them, the detection unit is used to generate a voltage-dividing signal when the germicidal lamp is working normally, otherwise it does not generate a voltage-dividing signal;

[0035] The output unit is used to output a detection signal according to the voltage-dividing signal of the detection unit to indicate whether the germicidal lamp is faulty.

[0036] Further, the detection unit uses multiple diodes connected in series to output a voltage-dividing signal with a suitable voltage value.

[0037] Further, the output unit uses a light-emitting diode. When the detection unit generates a voltage-dividing signal, the light-emitting diode lights up; otherwise, the light-emitting diode does not light up.

[0038] Further, the output unit uses an optocoupler. The input end of the optocoupler is connected to the voltage-dividing signal, and the output end of the optocoupler outputs a detection signal.

[0039] Adopting the above technical solutions of the present utility model, the sterilization lamp fault detection has the following advantages:

[0040] (1) Real-time monitoring: The circuit combines a voltage-dividing circuit formed by multiple diodes connected in series with an optocoupler to convert the working current of the sterilization lamp into a level signal recognizable by the single-chip microcomputer, thereby realizing real-time monitoring of the working state of the sterilization lamp. This improves the accuracy of the detection results and ensures safe use.

[0041] (2) High efficiency and stability: The circuit structure is simple, the cost is low, and the fault detection effect is stable and reliable. Timely alarm: When the sterilization lamp works abnormally, it can quickly trigger the alarm mechanism set inside the single-chip microcomputer to ensure that problems can be discovered in time.

[0042] (3) Little impact on the sterilization lamp: The voltage drop is controlled by the optocoupler through diodes connected in series. The diode voltage drops are relatively consistent, less affected by the current of the sterilization lamp, and also have less impact on the working voltage of the sterilization lamp.

[0043] (4) Real-time response: The circuit structure is simple, the response speed is fast, and it can monitor the working state of the sterilization lamp in real time.

[0044] (5) High reliability: It uses mature electronic components, is reasonably designed, works stably and reliably, and is applicable to the working state detection of various ultraviolet sterilization lamps.

[0045] (6) Easy to integrate: The detection circuit can be easily integrated with the existing sterilization lamp control system without major modifications to the original system.

[0046] The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bactericidal lamp fault detection circuit, characterized in that The fault detection circuit is connected in series to the working circuit of the germicidal lamp and is used to output a detection signal according to the working state of the germicidal lamp; The fault detection circuit at least includes a detection unit and an output unit. Among them, the detection unit is used to generate a voltage-dividing signal when the germicidal lamp is working properly, otherwise it does not generate a voltage-dividing signal; The output unit is used to output a detection signal according to the voltage-dividing signal of the detection unit to indicate whether the germicidal lamp is faulty.

2. The germicidal lamp fault detection circuit according to claim 1, wherein The detection unit uses multiple diodes connected in series to output a voltage-dividing signal with a suitable voltage value.

3. The germicidal lamp fault detection circuit according to claim 2, wherein, The output unit uses a light-emitting diode. When the detection unit generates a voltage-dividing signal, the light-emitting diode lights up; otherwise, the light-emitting diode does not light up.

4. The germicidal lamp fault detection circuit according to claim 2, characterized in that The output unit uses an optocoupler. The input end of the optocoupler is connected to the voltage-dividing signal, and the output end of the optocoupler outputs a detection signal.

5. The germicidal lamp fault detection circuit according to claim 4, wherein, The detection unit uses 4 diodes connected in series to output a voltage-dividing signal to drive the optocoupler.

6. The sterilizing lamp fault detection circuit according to claim 2, wherein The detection unit includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first resistor R1, a second resistor R2, and a first capacitor C1. Among them, the AC input L terminal is connected to the negative electrode of the first diode D1, the positive electrode of the second diode D2, one end of the first resistor R1, and one end of the second resistor R2. The negative electrode of the second diode D2 is connected to the positive electrode of the third diode D3. The negative electrode of the third diode D3 is connected to the positive electrode of the fourth diode D4. The negative electrode of the fourth diode D4 is connected to the positive electrode of the fifth diode D5. The negative electrode of the fifth diode D5 is connected to the positive electrode of the first diode D1, the other end of the first resistor R1, and one end of the first capacitor C1 and is connected to one end of the germicidal lamp power supply. The other end of the germicidal lamp power supply is connected to the AC input N terminal; the other end of the second resistor R2 is connected to the other end of the first capacitor C1, and the voltage-dividing signal is output at both ends of the first capacitor C1.

7. A germicidal lamp, characterized in that, A fault detection circuit is connected in series to the working circuit of the germicidal lamp. The fault detection circuit is used to output a detection signal according to the working state of the germicidal lamp to indicate whether the germicidal lamp is faulty; The fault detection circuit at least includes a detection unit and an output unit. Among them, the detection unit is used to generate a voltage-dividing signal when the germicidal lamp is working properly, otherwise it does not generate a voltage-dividing signal; The output unit is used to output a detection signal according to the voltage-dividing signal of the detection unit to indicate whether the germicidal lamp is faulty.

8. The germicidal lamp according to claim 7, wherein, The detection unit uses multiple diodes connected in series to output a voltage-dividing signal with a suitable voltage value.

9. The germicidal lamp according to claim 7, wherein, The output unit uses a light-emitting diode. When the detection unit generates a voltage-dividing signal, the light-emitting diode lights up; otherwise, the light-emitting diode does not light up.

10. The germicidal lamp according to claim 7, wherein The output unit uses an optocoupler. The input end of the optocoupler is connected to the voltage-dividing signal, and the output end of the optocoupler outputs a detection signal.

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