CN112880767A - Anti-overflow electric system for filtrate tank - Google Patents
Anti-overflow electric system for filtrate tank Download PDFInfo
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- CN112880767A CN112880767A CN202110032239.7A CN202110032239A CN112880767A CN 112880767 A CN112880767 A CN 112880767A CN 202110032239 A CN202110032239 A CN 202110032239A CN 112880767 A CN112880767 A CN 112880767A
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- 239000000706 filtrate Substances 0.000 title claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 239000003990 capacitor Substances 0.000 claims description 20
- 239000003381 stabilizer Substances 0.000 claims description 12
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 6
- 238000007654 immersion Methods 0.000 claims description 5
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 210000000056 organ Anatomy 0.000 description 3
- 230000036541 health Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses an anti-overflow electric system for a filtrate tank, which comprises the filtrate tank and an overflow pipe, and comprises a central control chip, an AD conversion module, an alarm module, a display module and an intelligent control circuit module, wherein the filtrate tank and the overflow pipe are respectively provided with an acquisition module, the signal output end of the acquisition module is connected with the signal input end of the central control chip through the AD conversion module, the signal output end of the central control chip is connected with the signal input end of the display module, the signal output end of the central control chip is further connected with the signal input end of the alarm module, one end of a liquid pumping module is arranged in the filtrate tank, and the signal output end of the alarm module is connected with the signal input end of the liquid pumping module through the intelligent control circuit module. The scheme has high sensitivity, high automation degree and low device cost, does not need manual operation, has great economic benefit, ensures the safety of personnel to a certain extent, protects the environment and prevents the pollution caused by the overflow of filtrate.
Description
Technical Field
The invention belongs to the technical field of overflow prevention of a filtrate tank, and particularly relates to an overflow prevention electric system for the filtrate tank.
Background
At present, a water level sensor is used as a liquid level detection device for detecting a filtrate tank, and an output current signal of the liquid level detection device is used for displaying the liquid level of an operation picture of an upper computer on one hand and is used as a control signal to control the starting and stopping of a motor of the filtrate tank on the other hand, when the liquid level reaches 60%, the motor is started, a water pump works to convey filtrate to a secondary flotation for reprocessing, and when the liquid level is lower than 30%, the motor stops and the water pump also stops working at the same time.
And in the water level sensor in the use, can cause the distortion of liquid level detection because of the erosion of water smoke and coal dust in the pond, the true situation of liquid level in the pond can't be represented to the signal of distortion, consequently, when the true liquid level that reaches the highest in the pond appears, when water level sensor still shows the condition of the signal of output low liquid level, the unable normal start-up of water pump, filtrating will follow overflow pipe and flow out, if find untimely, will seriously influence first floor production safety and ground sanitation and hygiene.
In the prior art, the distortion condition of the water level sensor is checked manually and periodically, the timeliness is not realized, the influence caused by water entering the overflow pipe due to the distortion of the water level sensor is caused most of the time, and the distortion of the water level sensor cannot be found and solved at the first time. Or some robots are developed for inspection, but the cost is high, and no economic benefit is obtained.
Disclosure of Invention
The invention aims to provide an anti-overflow monitoring system which is used for a filtrate tank and has the advantages of sensitivity, high accuracy and lower cost.
In order to achieve the purpose, the invention adopts the technical scheme that: including filtrate pond and overflow pipe, including well accuse chip, AD conversion module, alarm module, display module and intelligent control circuit module, all be provided with collection module in filtrate pond and the overflow pipe, collection module's signal output part passes through AD conversion module and is connected with well accuse chip's signal input part, well accuse chip's signal output part is connected with display module's signal input part, well accuse chip's signal output part is connected with alarm module's signal input part in addition, the one end setting of drawing liquid module is in the filtrate pond, alarm module's signal output part passes through intelligent control circuit module and is connected with the signal input part of drawing liquid module.
According to the anti-overflow electric system for the filtrate tank, the central control chip is an AT89C52 single chip microcomputer, and a reset circuit is arranged on the periphery of the AT89C52 single chip microcomputer and connected with a crystal oscillator circuit; the collecting module consists of a water level sensor and a water immersion sensor, the water level sensor is fixedly arranged in the middle of the inner wall of the filtrate tank, the detecting end of the water level sensor extends into the filtrate tank, and the water immersion sensor is fixedly arranged at the inlet end of the overflow pipe; the signal output end of the water level sensor is connected with the signal input end of the central control chip through the conversion module, and the signal output end of the water sensor is connected with the signal input end of the central control chip through the voltage reduction and voltage stabilization circuit.
This technical scheme provides a pair of anti-overflow galvanic electric system for filtrating pond, AD conversion module is an AD converter, and the model of AD converter is ADC0809, level sensor's signal output part pass through ADC0809 with the input pin of well accuse chip is connected.
The anti-overflow electric system for the filtrate tank provided by the technical scheme is characterized in that the voltage reduction and voltage stabilization circuit consists of a three-terminal regulator, a plurality of unidirectional diodes for voltage reduction, an input filter capacitor and an output filter capacitor, the unidirectional diodes are sequentially connected in series, the cathodes of two adjacent unidirectional diodes are connected with the anode and are sequentially connected in series, one point potential of the water sensor is connected with the anode of the first-end unidirectional diode through one point potential of the input filter capacitor, the cathode of the tail-end unidirectional diode is connected with an input pin of the three-terminal voltage stabilizer, the grounding end of the three-terminal voltage stabilizer is grounded, an output pin of the three-terminal voltage stabilizer is connected with the input pin of the central control chip through one point potential of the output filter capacitor, and the other point potential of the water sensor is connected with the input pin of the central control chip through the other point potential of the input filter capacitor and the other point potential of the output filter capacitor.
The utility model provides a pair of anti-overflow galvanic electric system for filtrating pond, alarm module is an audible alarm circuit and light alarm circuit, audible alarm circuit's signal input part with the signal output pin of well accuse chip is connected, and light alarm circuit is connected with the signal output pin of well accuse chip in addition, and light alarm circuit's signal output part passes through intelligent control circuit module with the signal input part of drawing liquid module connects.
This technical scheme provides a pair of anti-overflow galvanic electric system for filtrating pond, audible alarm circuit comprises a first definite value resistance, a triode, a bee calling organ and first power, and well accuse chip's output pin is connected with bee calling organ's signal input part through first definite value resistance and triode, and bee calling organ's signal output part ground connection, the triode meets with first power in addition.
This technical scheme provides a pair of anti-overflow galvanic electric system for filtrating pond, light alarm circuit comprises an infrared emitting diode, a second definite value resistance and second power, infrared emitting diode's negative pole with well accuse chip's output pin links to each other, and infrared emitting diode's positive pole passes through second definite value resistance and links to each other with the second power, and infrared emitting diode's signal output part passes through intelligent control circuit module with the signal input part of drawing liquid module connects.
The utility model provides a pair of an anti-overflow galvanic electric system for filtrating pond, intelligent control circuit module comprises a photoelectric coupler and an impervious airtight casing, infrared emitting diode and photoelectric coupler all set up in airtight casing, and photoelectric coupler sets up in the circuit of drawing liquid module.
This technical scheme provides a pair of anti-overflow galvanic electric system for filtrating pond, the drawing liquid module comprises an drawing liquid pump and third power, and the power output of third power passes through photoelectric coupler is connected with the motor power input of drawing liquid pump.
This technical scheme provides a pair of anti-overflow galvanic electric system for filtrating pond, display module is a liquid crystal display, liquid crystal display's signal input pin with the signal output pin of well accuse chip links to each other.
Adopt this technical scheme, when level sensor normally works, guarantee the liquid level height in the filtrating pond through setting up predetermined threshold and level sensor for the singlechip, after level sensor distortion, intake in the overflow pipe of overflow pond, water sensor accessible singlechip and light warning circuit open the drawing liquid pump and carry out the drawing liquid, this scheme has high sensitivity, degree of automation is higher, and the precision is very high can not the maloperation, high efficiency, high integration, the volume is very little and the good reliability, the strong and low-power consumption of control power, low-voltage, and the device cost is lower, need not manual operation, great economic benefits has, personnel's safety has also been guaranteed to a certain extent, the environment has also been protected, prevent the pollution that the filtrating spills over and cause, environment and health have been protected.
The invention will be explained in more detail below with reference to the drawings and examples.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic block flow diagram of the present invention;
FIG. 2 is a schematic diagram of a voltage stabilizing and dropping circuit according to the present invention;
FIG. 3 is a schematic circuit diagram of an alarm module of the present invention;
FIG. 4 is a schematic flow diagram of an intelligent control circuit module according to the present invention;
FIG. 5 is a schematic diagram of a system control embodiment of the present invention;
labeled as: 1. a water immersion sensor; 2. inputting a filter capacitor; 3. a unidirectional diode; 4. a three-terminal voltage stabilizer; 5. an output filter capacitor; 6. a first constant value resistor; 7. a triode; 8. a first power supply; 9. a buzzer; 10. an infrared light emitting diode; 11. a second fixed-value resistor; 12. a second power supply; 13. AT89C52 singlechip.
Detailed Description
The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail for the purpose of providing a more complete, accurate and thorough understanding of the inventive concepts and technical solutions of the present invention, including the shapes of the components, the structures, the mutual positions and connection relationships of the components, the functions and operating principles of the components, the manufacturing processes, the operation and use methods, and the like.
Example (b):
an anti-overflow galvanic electric system for filtrating pond that fig. 1 shows includes filtrating pond and overflow pipe, including well accuse chip, AD conversion module, alarm module, display module and intelligent control circuit module, all be provided with collection module in filtrating pond and the overflow pipe, collection module's signal output part passes through AD conversion module and is connected with well accuse chip's signal input part, well accuse chip's signal output part is connected with display module's signal input part, well accuse chip's signal output part is connected with alarm module's signal input part in addition, the one end setting of drawing liquid module is in the filtrating pond, alarm module's signal output part passes through intelligent control circuit module and is connected with the signal input part of drawing liquid module.
The central control chip is an AT89C52 singlechip 13, the AT89C52 singlechip 13 is fixedly arranged on the outer wall of the filtrate tank, and a reset circuit arranged on the periphery of the AT89C52 singlechip 13 is connected with the crystal oscillator circuit; the acquisition module consists of a water level sensor and a water sensor 1, the water level sensor is fixedly arranged in the middle of the inner wall of the filtrate tank, the detection end of the water level sensor extends into the filtrate tank, and the water sensor 1 is fixedly arranged at the inlet end of the overflow pipe; the signal output end of the water level sensor is connected with the signal input end of the central control chip through the conversion module, and the signal output end of the water sensor 1 is connected with the signal input end of the central control chip through the voltage reduction and voltage stabilization circuit.
The AT89C52 is a low-voltage and high-performance CMOS singlechip, the singlechip contains a Flash read-only program memory and a random access data memory which can be repeatedly erased and written, a universal 8-bit central processing unit and a Flash storage unit are arranged in the singlechip, and the AT89C52 singlechip is widely applied to the electronic industry. The AT89C52 has 40 pins, 32 external bidirectional input/output ports, 2 external medium fractures, 3 16-bit programmable timing counters, 2 full-duplex serial communication ports and 2 read-write port lines, and the AT89C52 can be programmed according to a conventional method and can also be programmed on line. The universal microprocessor and the Flash memory are combined together, and particularly the Flash memory which can be repeatedly erased and written can effectively reduce the development cost.
The height of the filtrate tank is five meters, the preset liquid level height value set by the AT89C52 single chip microcomputer 13 is forty percent of the height of the filtrate tank, namely the liquid level height is two meters, and the threshold value can be adjusted according to the situation.
The AD conversion module is an AD converter, the model of the AD converter is ADC0809, and the signal output end of the water level sensor is connected with the input pin of the central control chip through the ADC 0809.
The buck regulator circuit shown in figure 2 is a three terminal regulator 4, a plurality of unidirectional diodes 3 for buck, the water sensor comprises an input filter capacitor 2 and an output filter capacitor 5, a plurality of unidirectional diodes 3 are sequentially connected in series, the cathodes of two adjacent unidirectional diodes 3 are sequentially connected in series, one point potential of the water sensor 1 is connected with the anode of the unidirectional diode 3 at the head end through one point potential of the input filter capacitor 2, the cathode of the unidirectional diode at the tail end is connected with an input pin of a three-terminal voltage stabilizer 4, the grounding end of the three-terminal voltage stabilizer 4 is grounded, an output pin of the three-terminal voltage stabilizer 4 is connected with the input pin of the central control chip through one point potential of the output filter capacitor 5, and the other point potential of the water sensor 1 is connected with the input pin of the central control chip through the other point potential of the input filter capacitor 2 and the other point potential of the output filter capacitor 5. The single chip microcomputer obtains 5V electric signals, so the voltage needs to be reduced, the voltage is stabilized in the voltage reduction process, 5 one-way diodes are selected to be sequentially connected in series, the 12V voltage is reduced to 5V, the voltage of each diode can be reduced by 1.4V, and an LM7805 is selected as a chip of the three-terminal voltage stabilizer.
The alarm module shown in fig. 3 is an acoustic alarm circuit and an optical alarm circuit, wherein a signal input end of the acoustic alarm circuit is connected with a signal output pin of the central control chip, the optical alarm circuit is connected with a signal output pin of the central control chip, and a signal output end of the optical alarm circuit is connected with a signal input end of the liquid extraction module through the intelligent control circuit module.
The sound alarm circuit is composed of a first constant value resistor 6, a triode 7, a buzzer 9 and a first power supply 8, an output pin of the central control chip is connected with a signal input end of the buzzer 9 through the first constant value resistor 6 and the triode 7, a signal output end of the buzzer 9 is grounded, and the triode 7 is connected with the first power supply 8.
The light alarm circuit is composed of an infrared light emitting diode 10, a second fixed value resistor 11 and a second power supply 12, the cathode of the infrared light emitting diode 10 is connected with an output pin of the central control chip, the anode of the infrared light emitting diode 10 is connected with the second power supply 12 through the second fixed value resistor 11, and the signal output end of the infrared light emitting diode 10 is connected with the signal input end of the liquid pumping module through the intelligent control circuit module.
The intelligent control circuit module consists of a photoelectric coupler and a light-tight closed shell, the infrared light-emitting diode 10 and the photoelectric coupler are both arranged in the closed shell, and the photoelectric coupler is arranged in a circuit of the liquid pumping module. The closed shell is made of polyformaldehyde.
The drawing module shown in fig. 4 is composed of a drawing pump and a third power supply, and the power supply output end of the third power supply is connected with the motor power supply input end of the drawing pump through a photoelectric coupler.
The display module is a liquid crystal display screen, and a signal input pin of the liquid crystal display screen is connected with a signal output pin of the central control chip. The liquid crystal display screen adopts 1602 liquid crystal display module.
In the system control flow chart shown in fig. 5, when the system is used, an analog signal is converted into a digital signal by a water level sensor in the filtering liquid pool through an ADC0809 and enters and exits a single chip microcomputer, the liquid level height is displayed on a liquid crystal display, when the height is higher than two meters, a buzzer 9 in an acoustic alarm circuit starts to give an alarm sound prompt, an infrared light emitting diode 10 in an optical alarm circuit lights, a photoelectric coupler with the infrared light emitting diode is coupled at the moment, a circuit of a liquid suction pump is conducted, and liquid suction is started; when level sensor is out of order, the liquid level is too high, but level sensor can't gather the signal and spread into the singlechip, when steel was intake in the overflow pipe this moment, water sensor 1 gathered the signal and passed into the singlechip through steady voltage step-down circuit, buzzer 9 among the audible alarm circuit begins to send the chimes of doom, need maintain level sensor this moment, infrared emitting diode 10 among the optical alarm circuit can shine, photoelectric coupler this moment coupling together with it, the circuit of drawing liquid pump switches on, begin the drawing liquid, the filtrating of filtrate pond can be avoided as far as to this kind of scheme is revealed.
Adopt this technical scheme, when level sensor normally works, guarantee the liquid level height in the filtrating pond through setting up predetermined threshold and level sensor for the singlechip, after level sensor distortion, intake in the overflow pipe of overflow pond, water sensor accessible singlechip and light warning circuit open the drawing liquid pump and carry out the drawing liquid, this scheme has high sensitivity, degree of automation is higher, and the precision is very high can not the maloperation, high efficiency, high integration, the volume is very little and the good reliability, the strong and low-power consumption of control power, low-voltage, and the device cost is lower, need not manual operation, great economic benefits has, personnel's safety has also been guaranteed to a certain extent, the environment has also been protected, prevent the pollution that the filtrating spills over and cause, environment and health have been protected.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (10)
1. The utility model provides an anti-overflow galvanic electric system for filtrate pond, includes filtrate pond and overflow pipe, its characterized in that: including well accuse chip, AD conversion module, alarm module, display module and intelligent control circuit module, all be provided with collection module in filtrating pond and the overflow pipe, collection module's signal output part passes through AD conversion module and is connected with well accuse chip's signal input part, well accuse chip's signal output part is connected with display module's signal input part, well accuse chip's signal output part is connected with alarm module's signal input part in addition, the one end setting of drawing liquid module is in the filtrating pond, alarm module's signal output part passes through intelligent control circuit module and is connected with the signal input part of drawing liquid module.
2. An anti-overflow electrical system for a filtrate tank as defined in claim 1 wherein: the central control chip is an AT89C52 single chip microcomputer, and a reset circuit arranged on the periphery of the AT89C52 single chip microcomputer is connected with the crystal oscillator circuit; the collecting module consists of a water level sensor and a water immersion sensor, the water level sensor is fixedly arranged in the middle of the inner wall of the filtrate tank, the detecting end of the water level sensor extends into the filtrate tank, and the water immersion sensor is fixedly arranged at the inlet end of the overflow pipe; the signal output end of the water level sensor is connected with the signal input end of the central control chip through the conversion module, and the signal output end of the water sensor is connected with the signal input end of the central control chip through the voltage reduction and voltage stabilization circuit.
3. An anti-overflow electrical system for a filtrate tank as defined in claim 2 wherein: the AD conversion module is an AD converter, the model of the AD converter is ADC0809, and the signal output end of the water level sensor is connected with the input pin of the central control chip through the ADC 0809.
4. An anti-overflow electrical system for a filtrate tank as defined in claim 2 wherein: the voltage reduction and stabilization circuit comprises a three-terminal voltage stabilizer, a plurality of unidirectional diodes for reducing voltage, an input filter capacitor and an output filter capacitor, wherein the unidirectional diodes are sequentially connected in series, the cathodes of two adjacent unidirectional diodes are sequentially connected in series, one point potential of the water sensor is connected with the anode of the unidirectional diode at the head end through one point potential of the input filter capacitor, the cathode of the unidirectional diode at the tail end is connected with an input pin of the three-terminal voltage stabilizer, the grounding end of the three-terminal voltage stabilizer is grounded, the output pin of the three-terminal voltage stabilizer is connected with the input pin of the central control chip through one point potential of the output filter capacitor, and the other point potential of the water sensor is connected with the input pin of the central control chip through the other point potential of the input filter capacitor and the other point potential of the output filter capacitor.
5. An anti-overflow electrical system for a filtrate tank as defined in claim 1 wherein: the alarm module is an acoustic alarm circuit and an optical alarm circuit, the signal input end of the acoustic alarm circuit is connected with the signal output pin of the central control chip, the optical alarm circuit is connected with the signal output pin of the central control chip, and the signal output end of the optical alarm circuit is connected with the signal input end of the liquid pumping module through the intelligent control circuit module.
6. An anti-overflow electrical system for a filtrate tank as defined in claim 5 wherein: the sound alarm circuit consists of a first constant value resistor, a triode, a buzzer and a first power supply, wherein an output pin of the central control chip is connected with a signal input end of the buzzer through the first constant value resistor and the triode, a signal output end of the buzzer is grounded, and the triode is connected with the first power supply.
7. An anti-overflow electrical system for a filtrate tank as defined in claim 5 wherein: the light alarm circuit is composed of an infrared light emitting diode, a second fixed value resistor and a second power supply, the cathode of the infrared light emitting diode is connected with an output pin of the central control chip, the anode of the infrared light emitting diode is connected with the second power supply through the second fixed value resistor, and the signal output end of the infrared light emitting diode is connected with the signal input end of the liquid pumping module through the intelligent control circuit module.
8. An anti-overflow electrical system for a filtrate tank as defined in claim 7 wherein: the intelligent control circuit module is composed of a photoelectric coupler and a light-tight sealed shell, the infrared light-emitting diode and the photoelectric coupler are both arranged in the sealed shell, and the photoelectric coupler is arranged in a circuit of the liquid pumping module.
9. An anti-overflow electrical system for a filtrate tank as defined in claim 8 wherein: the liquid pumping module consists of a liquid pumping pump and a third power supply, and the power supply output end of the third power supply is connected with the motor power supply input end of the liquid pumping pump through the photoelectric coupler.
10. An anti-overflow electrical system for a filtrate tank as defined in claim 1 wherein: the display module is a liquid crystal display screen, and a signal input pin of the liquid crystal display screen is connected with a signal output pin of the central control chip.
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| CN202110032239.7A CN112880767B (en) | 2021-01-11 | 2021-01-11 | Anti-overflow electrical system for liquid filtering tank |
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