CN202770496U - Circuit structure of liquid-level sensor - Google Patents
Circuit structure of liquid-level sensor Download PDFInfo
- Publication number
- CN202770496U CN202770496U CN 201220505503 CN201220505503U CN202770496U CN 202770496 U CN202770496 U CN 202770496U CN 201220505503 CN201220505503 CN 201220505503 CN 201220505503 U CN201220505503 U CN 201220505503U CN 202770496 U CN202770496 U CN 202770496U
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- China
- Prior art keywords
- motor
- level sensor
- diode
- circuit structure
- chip
- 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
The utility model discloses a circuit structure of a liquid-level sensor. The circuit structure comprises a motor (M), a power source (E) and a buzzer circuit, wherein the motor (M) is parallelly connected at two ends of the power source (E), the buzzer circuit comprises a chip (IC (integrated circuit)) and a buzzer (BZ), and the chip (IC) is connected with a negative electrode of the motor (M). The circuit structure is characterized in that two ends of the motor (M) are connected with a diode (D) in parallel, an input end of the diode (D) is connected with a negative electrode of the motor (M), and an output end of the diode (D) is connected with a positive electrode of the motor (M). The circuit structure of the liquid-level sensor can protect the buzzer from breakdown.
Description
Technical field
The utility model relates to a kind of circuit structure of liquid level sensor.
Background technology
Liquid level sensor is a kind of sensor of measuring liquid level.The circuit structure of liquid level sensor comprises motor, power supply and buzzer circuit.Described motor parallel is at the two ends of described power supply.Described buzzer circuit comprises chip and hummer.Described chip is connected with the motor negative pole.There is following defective in the circuit structure of the liquid level sensor of this kind prior art: can produce a reverse impulse when motor stops, the positive pole that is motor becomes negative pole, the negative pole of motor becomes positive pole, and electric current flows out from positive pole, and might puncture the chip of hummer and damage hummer this moment.
The utility model content
The technical problems to be solved in the utility model is that a kind of circuit structure that can protect the not breakdown liquid level sensor of hummer is provided.
Technical solution of the present utility model is, a kind of circuit structure with liquid level sensor of following structure is provided, and comprises motor, power supply and buzzer circuit; Described motor parallel is at the two ends of described power supply; Described buzzer circuit comprises chip and hummer; Described chip is connected with the motor negative pole; The two ends of described motor are parallel with diode; The input end of described diode is connected with the motor negative pole, and the output terminal of described diode is connected with motor is anodal.
After adopting above structure, the circuit structure of liquid level sensor of the present utility model compared with prior art, has the following advantages:
Because the two ends of the motor of liquid level sensor of the present utility model are parallel with diode, the input end of diode is connected with the motor negative pole, and the output terminal of diode is connected with motor is anodal; Like this, when motor stopped to produce reverse impulse, diode can discharge electric energy, avoided the reverse impulse that this moment, motor produced to puncture the hummer chip, thereby can protect hummer not damaged.
Description of drawings
Fig. 1 is the electrical block diagram of liquid level sensor of the present utility model.
Shown in the figure: M, motor, E, power supply, IC, chip, BZ, hummer, D, diode.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
See also shown in Figure 1ly, the circuit structure of liquid level sensor of the present utility model comprises motor M, power supply E and buzzer circuit.Described motor M is connected in parallel on the two ends of described power supply E.Described buzzer circuit comprises chip IC and hummer BZ.Described chip IC is connected with the motor M negative pole, and described hummer BZ is connected with chip IC.The two ends of described motor M are parallel with diode D, and the input end of described diode D is connected with the motor M negative pole, and the output terminal of described diode D is connected with motor M is anodal.
Claims (1)
1. the circuit structure of a liquid level sensor comprises motor (M), power supply (E) and buzzer circuit; Described motor (M) is connected in parallel on the two ends of described power supply (E); Described buzzer circuit comprises chip (IC) and hummer (BZ); Described chip (IC) is connected with motor (M) negative pole; It is characterized in that: the two ends of described motor (M) are parallel with diode (D); The input end of described diode (D) is connected with motor (M) negative pole, and the output terminal of described diode (D) is connected with motor (M) is anodal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220505503 CN202770496U (en) | 2012-09-29 | 2012-09-29 | Circuit structure of liquid-level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220505503 CN202770496U (en) | 2012-09-29 | 2012-09-29 | Circuit structure of liquid-level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202770496U true CN202770496U (en) | 2013-03-06 |
Family
ID=47777061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220505503 Expired - Fee Related CN202770496U (en) | 2012-09-29 | 2012-09-29 | Circuit structure of liquid-level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202770496U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157783A (en) * | 2015-05-26 | 2015-12-16 | 孙景春 | Circuit structure of liquid level sensor |
-
2012
- 2012-09-29 CN CN 201220505503 patent/CN202770496U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157783A (en) * | 2015-05-26 | 2015-12-16 | 孙景春 | Circuit structure of liquid level sensor |
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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: 20130306 Termination date: 20140929 |
|
| EXPY | Termination of patent right or utility model |