Dust isolation sensor with self-cleaning function

Abstract

The present invention relates to dust detection, and in particular to a dust isolation sensor with a self-cleaning function, comprising a box body, which is provided with an air duct, which has an air inlet and an air outlet, a light-emitting component and a photosensitive component, a graphite electrode inserted in the air duct, and the graphite electrode is connected to an electrode of a DC power supply; the air inlet of the suction fan faces the air outlet of the air duct; the box body also comprises a vibration motor, which is installed on the outer wall of the air duct, and the vibration of the vibration motor drives the air duct to vibrate; the box body also comprises an air blowing nozzle, which includes an air inlet and an air blowing port, and the air blowing nozzle faces the inner cavity of the air duct, the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air; the box body is connected to a ceramic bracket, which supports the graphite electrode; the part where the ceramic bracket is connected to the graphite electrode is padded with a rubber pad; the dust in the air duct is continuously removed to maintain the stability of the dust sensor during long-term use.

Description

Technical Field

[0001] The present invention relates to the technical field of dust detection, in particular to a dust isolation sensor. Background Art

[0002] Dust detection in substations is crucial because dust accumulation can affect equipment heat dissipation, leading to overheating, short circuits, and other malfunctions. Continuous monitoring instruments are needed to monitor substation dust levels in real time to prevent excessive dust concentrations in the air.

[0003] However, dust will continue to accumulate and adhere to the dust sensor during use, which may cause sensor misreading or measurement deviation, affecting the long-term stability of the dust sensor. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the invention.

[0005] In view of the problems existing in the above-mentioned prior art, the present invention is proposed. To solve the above-mentioned technical problems, the present invention provides the following technical solutions:

[0006] A dust isolation sensor with a self-cleaning function comprises a housing, the housing being provided with an air duct through which air flows, the air duct having an air inlet and an air outlet, a light-emitting component for illuminating the air flow in the air duct, and a light-sensing component for generating scattered light after receiving light irradiating dust;

[0007] A graphite electrode is inserted into the channel through which the airflow of the air duct passes, and the graphite electrode is connected to an electrode of a DC power supply, which is called an adsorption electrode;

[0008] The graphite electrode is arranged along the air flow path in the air duct, the length of the graphite electrode is not less than two-thirds of the length of the air duct, and there is a gap between the graphite electrode and the side wall of the air duct;

[0009] The graphite electrode avoids the irradiation area of ​​the light of the light emitting component, and the graphite electrode also avoids the sensing area of ​​the photosensitive component;

[0010] The diameter of the graphite electrode is less than one quarter of the minimum inner diameter of the air duct;

[0011] The graphite electrodes are arranged with pores having a diameter of 0.1-0.2 mm;

[0012] It also includes an air suction fan, wherein the air suction port of the air suction fan faces the air outlet of the air duct;

[0013] Also included is a vibration motor, which is installed in the box body, and the vibration of the vibration motor drives the air duct to vibrate;

[0014] It also includes an air blowing nozzle, the air blowing nozzle includes an air inlet and an air blowing port, the air blowing nozzle is directed toward the inner cavity of the air duct, the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air;

[0015] The box body is connected to a ceramic bracket, and the ceramic bracket supports the graphite electrode;

[0016] The portion where the ceramic bracket is connected to the graphite electrode is padded with a rubber pad.

[0017] The above design makes dust removal from the air duct difficult. Therefore, a graphite electrode is inserted into the duct and connected to the adsorption electrode of a DC power supply. This electrode electrostatically adsorbs dust, avoiding the illumination area of ​​the light-emitting component and the sensing area of ​​the photosensitive component to prevent interference with detection. This prevents dust in the duct from affecting the sensor's measurement accuracy, thus ensuring the long-term stability and detection accuracy of the dust sensor. The graphite electrode is arranged along the duct path, with a length no less than the duct length, to avoid obstructing air flow and ensuring the stable operation of the dust sensor unaffected by the graphite electrode. The electrode's diameter is less than one-quarter of the duct's minimum inner diameter to ensure unobstructed airflow. Fine holes are provided in the electrode to facilitate the penetration of airflow and dust, enhancing the adsorption area and efficiency.

[0018] Equipped with a vibration motor, the vibration motor drives the air duct to vibrate, helping dust to escape from the inner wall of the duct, facilitating duct cleaning. A gap is maintained between the graphite electrode and the duct wall to prevent vibration from affecting the stability of the graphite electrode structure. Equipped with an air nozzle, facing the inner cavity of the air duct, the air nozzle is connected to an air pump and a clean air source to flush and remove accumulated dust, maintaining the long-term stable and accurate working condition of the sensor.

[0019] The suction fan can draw air and drive the air duct to absorb the air in the substation. The air does not have to pass through the blades of the suction fan, ensuring the accuracy of the dust isolation sensor's measurement.

[0020] The dust isolation sensor periodically monitors the substation's dust concentration. Before starting dust concentration monitoring, the air nozzle, vibration motor, and suction fan are activated to remove dust from the air duct and prevent dust accumulation from affecting measurement accuracy. The DC power supply is then turned on, maintaining the polarity of the graphite electrodes and electrostatically attracting any remaining dust in the air duct, preventing it from settling on the inner sidewalls. After the air nozzle, vibration motor, suction fan, and DC power supply have been operating for a period of time, they are turned off, and dust concentration monitoring is resumed.

[0021] The ceramic bracket further improves the structural stability of the graphite electrode, preventing the suction fan and the blowing nozzle from shaking the ceramic bracket and affecting the structural stability of the graphite electrode. The rubber pad reduces the vibration of the air duct when the vibration motor is working and transmits it to the graphite electrode, ensuring the structural stability of the graphite electrode.

[0022] Preferably, the outer wall of the air duct is provided with a conductive layer of copper material, connected to the other electrode of a DC power supply. The DC power supply is connected to the conductive layer via a pulse circuit, and the pulse circuit is provided with a circuit switch. When the circuit switch is turned on, the DC power supply and the conductive layer are connected, and when the circuit switch is turned off, the conductive layer is connected to ground. The conductive layer has an opposite electrical polarity to the graphite electrode. The DC power supply is turned on when the vibration motor is activated. When the air duct vibrates with the vibration motor, dust particles adhering to the air duct wall are charged, facilitating the graphite electrode to attract dust particles with opposite electrical polarity. The pulse circuit increases the probability of adding charge to the dust particles. When the circuit switch is turned off, the conductive layer is connected to ground to release static electricity, preventing static electricity from attracting dust particles and causing dust accumulation.

[0023] Preferably, the vibration motor, air blowing nozzle and graphite electrode have a cycle operation time of not less than 60 seconds to ensure that the dust in the air duct is fully dispersed and cleaned in each cycle.

[0024] The circuit switch is turned on 15 seconds after the vibration motor is turned on and closed 15 seconds before the vibration motor is turned off. During the vibration process, dust may be attracted to the conductive layer by static electricity, making it difficult to shake off the dust. 15 seconds after the vibration motor is turned on, the circuit switch is activated to generate an electric field, which helps to repel charged dust from the conductive layer or attract it to the graphite electrode, preventing static adsorption. 15 seconds before the vibration motor is turned off, the circuit switch is closed to release the static charge from the conductive layer. This allows the dust to break away from the conductive layer and be completely shaken off through vibration and air flushing.

[0025] Preferably, the graphite electrode is turned on 10-15 seconds after the air nozzle is started and turned off 10-15 seconds after the air nozzle is turned off. This timing control is intended to ensure that the airflow removes unstable adsorbed dust on the graphite electrode after passing through, and the electrode is powered on in time and maintained for 10-15 seconds after the air nozzle is turned off to maintain stable dust adsorption.

[0026] Preferably, a transparent cylindrical glass tube is used as the air duct; a magnetic induction brush system is also provided. The magnetic induction brush system includes a rotating mechanism disposed outside the glass tube and rotating around the glass tube; a brush mechanism disposed within the glass tube and rotating in close proximity to the inner wall of the glass tube; the rotating mechanism includes a first permanent magnet module that rotates in close proximity to the outer wall of the glass tube; and the brush mechanism includes a second permanent magnet module that rotates in close proximity to the inner wall of the glass tube. Both the first and second permanent magnet modules utilize a Halbach magnet arrangement, with the first and second permanent magnet modules arranged along the length of the glass tube. The width of the first and second permanent magnet modules is less than 1 mm, and the first and second permanent magnet modules form a double Halbach structure with magnetic coupling. The magnetic induction brush system facilitates brush cleaning of dust from the inner wall of the glass tube, maintaining a clean air duct. The first permanent magnet module rotates to drive the second permanent magnet module. The double Halbach structure realizes magnetic linkage to drive the brush mechanism to rotate, avoiding the installation of complex mechanical transmission components in the tube, reducing resistance and wear, and facilitating long-term stable operation.

[0027] Preferably, the graphite electrode is provided with a wind shield, which is positioned at one end of the graphite electrode near the air inlet. The wind shield blocks the airflow from the blowing nozzle that is directed toward the graphite electrode. The wind shield is conical in shape, with the tip of the conical wind shield pointing in the direction of the air blowing nozzle. The wind shield blocks the airflow from the blowing nozzle that is directed toward the graphite electrode, protecting the graphite electrode from direct impact and damage from the high-pressure airflow. The conical structure guides the airflow, reduces the generation of eddies, and ensures smooth airflow within the air duct. This reduces the direct impact of wind on the graphite electrode, creates a more stable working environment for the graphite electrode, and reduces vibration or displacement of the graphite electrode caused by airflow.

[0028] Preferably, at least two fixing rings are arranged along the trajectory of the graphite electrode; the diameter of the fixing ring is larger than the outer diameter of the graphite electrode. The fixing rings improve the structural stability of the graphite electrode.

[0029] Preferably, the graphite electrode is further provided with grooves arranged along the trajectory of the graphite electrode. The grooves increase the surface area of ​​the graphite electrode and further improve the dust adsorption effect.

[0030] Preferably, a polyurethane sponge strip is provided in the groove, and the width of the sponge strip is at least twice the depth of the groove. The abundant micropores of the sponge can capture fine dust, dust and other particles, thereby improving the dust collection efficiency.

[0031] Preferably, the sponge strip is provided with a woven mesh of aluminum wire. Aluminum wire is lightweight and corrosion-resistant, and has good electrical conductivity and ductility. Weaving it into the sponge in a grid pattern ensures uniform distribution, maintains the stability of the sponge structure, and provides electrostatic adsorption capabilities.

[0032] Preferably, four graphite electrodes are inserted into the air duct, and the four graphite electrodes are arranged in a square and inserted into the air duct. The multiple graphite electrodes increase the area for adsorbing dust and improve the efficiency of dust adsorption.

[0033] In summary, the present invention has the following beneficial effects:

[0034] 1. The dust in the air duct of the dust isolation sensor is difficult to remove. A graphite electrode connected to the adsorption electrode is inserted into the air duct. The graphite electrode electrostatically adsorbs the dust to prevent the dust in the air duct from affecting the measurement accuracy of the sensor, thereby ensuring the long-term stability and detection accuracy of the dust sensor.

[0035] 2. The vibration motor drives the air duct to vibrate, which helps the dust to leave the inner wall of the air duct. It is equipped with an air blowing nozzle, facing the inner cavity of the air duct. The air blowing nozzle is connected to the air pump and the clean air source to facilitate the cleaning of dust in the air duct and maintain the long-term stable and accurate working state of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them:

[0037] Figure 1 Schematic diagram of the air duct structure of the dust isolation sensor with self-cleaning function of the present invention;

[0038] Figure 2 This is a schematic diagram of the overall structure of the dust isolation sensor with self-cleaning function of the present invention;

[0039] Figure 3 Another structural diagram of the air duct of the dust isolation sensor with self-cleaning function of the present invention;

[0040] Figure 4 This is a structural schematic diagram of the glass tube air duct and magnetic induction brush system of the dust isolation sensor with self-cleaning function of the present invention.

[0041] In the figure, 1. box body; 11. ceramic bracket; 2. air duct; 3. graphite electrode; 31. wind shield; 32. sponge strip; 33. fixing ring; 4. suction fan; 5. air blowing nozzle; 6. vibration motor; 7. light-emitting component; 8. photosensitive component; 9. brush mechanism; 101. second permanent magnet module; 102. first permanent magnet module. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, these schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0045] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it necessarily refer to a single embodiment or a selective embodiment that is mutually exclusive of other embodiments.

[0046] Example 1, reference Figure 1-Figure 3 The dust isolation sensor with self-cleaning function includes a box body 1, which is provided with an air duct 2 through which air flows, and the air duct 2 has an air inlet and an air outlet. It also includes a light-emitting component 7 for irradiating the air flow in the air duct 2 and a photosensitive component 8 for generating scattered light after receiving light irradiating dust.

[0047] A graphite electrode 3 is inserted into the passage through which the airflow of the air duct 2 passes, and the graphite electrode 3 is connected to an electrode of a DC power supply, which is called an adsorption electrode;

[0048] The graphite electrode 3 is arranged along the air flow path in the air duct 2. The length of the graphite electrode 3 is not less than two-thirds of the length of the air duct 2. There is a gap between the graphite electrode 3 and the side wall of the air duct 2.

[0049] The graphite electrode 3 avoids the irradiation area of ​​the light emitting component 7, and the graphite electrode 3 also avoids the sensing area of ​​the photosensitive component 8;

[0050] The diameter of the graphite electrode 3 is less than one quarter of the minimum inner diameter of the air duct 2;

[0051] The graphite electrode 3 is arranged with pores with a diameter of 0.1-0.2 mm;

[0052] It also includes an air suction fan 4, the air suction port of the air suction fan 4 is directed toward the air outlet of the air duct 2;

[0053] It also includes a vibration motor 6, which is installed in the box body 1. The vibration of the vibration motor 6 drives the air duct 2 to vibrate;

[0054] The box body 1 is connected to a ceramic bracket 11, which supports the graphite electrode 3;

[0055] The part where the ceramic bracket 11 is connected to the graphite electrode 3 is padded with a rubber pad;

[0056] It also includes an air blowing nozzle 5, which includes an air inlet and an air blowing port. The air blowing nozzle 5 faces the inner cavity of the air duct 2, the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air.

[0057] The above design makes dust removal from air duct 2 difficult. Therefore, a graphite electrode 3 is inserted into air duct 2 and connected to an adsorption electrode of a DC power supply. This electrode electrostatically adsorbs dust, avoiding the illumination area of ​​the light-emitting component 7 and the sensing area of ​​the photosensitive component 8 to prevent interference with detection. This prevents dust in air duct 2 from affecting the sensor's measurement accuracy, thereby ensuring the long-term stability and detection accuracy of the dust sensor. The graphite electrode 3 is arranged along the trajectory of air duct 2, with a length no less than the length of air duct 2, to avoid obstructing air flow and ensuring the stable operation of the dust sensor unaffected by the graphite electrode 3. The electrode's diameter is less than one-quarter of the minimum inner diameter of air duct 2 to ensure unobstructed air flow. Fine holes are provided in the electrode to facilitate the penetration of airflow and dust, increasing the adsorption area and efficiency.

[0058] Equipped with a vibration motor 6, the vibration motor 6 drives the air duct 2 to vibrate, helping dust to escape from the inner wall of the air duct 2, facilitating the cleaning of the air duct 2. A gap is maintained between the graphite electrode 3 and the side wall of the air duct 2 to prevent vibration from affecting the stability of the graphite electrode 3 structure. Equipped with an air blowing nozzle 5, facing the inner cavity of the air duct 2, the air blowing nozzle 5 is connected to an air pump and a clean air source to flush and remove accumulated dust, maintaining the long-term stable and accurate working state of the sensor.

[0059] The suction fan 4 can draw air, driving the air duct 2 to absorb the air in the substation. The air does not need to pass through the blades of the suction fan 4, thereby ensuring the accuracy of the dust isolation sensor measurement.

[0060] The dust isolation sensor periodically monitors the substation's dust concentration. Before starting dust concentration monitoring, the air nozzle 5, vibration motor 6, and suction fan 4 are activated to remove dust from the air duct 2 and prevent dust accumulation from affecting measurement accuracy. The DC power switch is then turned on, and the graphite electrode 3 maintains its polarity, electrostatically adsorbing any remaining dust in the air duct 2 and preventing it from settling on the inner sidewalls. After the air nozzle 5, vibration motor 6, suction fan 4, and DC power supply have operated for a period of time, they are then turned off, and dust concentration monitoring begins.

[0061] The ceramic bracket 11 further improves the structural stability of the graphite electrode 3, prevents the suction fan 4 and the blowing nozzle 5 from shaking the ceramic bracket 11 and affecting the structural stability of the graphite electrode 3, and the rubber pad reduces the vibration of the air duct 2 when the vibration motor 6 is working and transmits it to the graphite electrode 3, thereby ensuring the structural stability of the graphite electrode 3.

[0062] The outer wall of the air duct 2 is coated with a conductive layer of copper material, connected to the other electrode of a DC power supply. The DC power supply is connected to the conductive layer via a pulse circuit. The pulse circuit is equipped with a circuit switch. When the circuit switch is turned on, the DC power supply and the conductive layer are connected, and when the circuit switch is turned off, the conductive layer is connected to ground. The conductive layer has an opposite electrical polarity to that of the graphite electrode 3. The DC power supply is turned on when the vibration motor 6 is activated. As the air duct 2 vibrates with the vibration motor 6, it adds an electrical charge to dust particles adhering to the air duct 2 wall, facilitating the graphite electrode 3 to attract dust particles with opposite electrical polarity. The pulse circuit increases the probability of adding an electrical charge to the dust particles. When the circuit switch is turned off, the conductive layer is connected to ground to discharge static electricity, preventing dust accumulation caused by static attraction.

[0063] The vibration motor 6, the air blowing nozzle 5 and the graphite electrode 3 cycle operation time is not less than 60 seconds. Ensure that the dust in the air duct 2 is fully dispersed and cleaned in each cycle.

[0064] The circuit switch is turned on 15 seconds after the vibration motor 6 is turned on and closed 15 seconds before the vibration motor 6 is turned off. During the vibration process, dust may be electrostatically adsorbed on the conductive layer, making it difficult to shake off the dust. 15 seconds after the vibration motor 6 is turned on, the circuit switch is activated to generate an electric field, which helps to repel charged dust from the conductive layer or adsorb it on the graphite electrode 3, preventing electrostatic adsorption. 15 seconds before the vibration motor 6 is turned off, the circuit switch is closed to release the static charge from the conductive layer. This allows the dust to break away from the conductive layer and be completely shaken off through vibration and air flushing.

[0065] The graphite electrode 3 is powered on 10-15 seconds after the air nozzle 5 starts running, and is powered off 10-15 seconds after the air nozzle 5 is turned off. This timing control is intended to ensure that the unstable adsorbed dust on the graphite electrode 3 is removed after the air flow passes through. The electrode is powered on in a timely manner and maintained for 10-15 seconds after the air nozzle 5 is turned off to maintain stable dust adsorption.

[0066] When in use, when the dust isolation sensor periodically detects the dust concentration in the substation, before starting the dust concentration detection work, first start the vibration motor 6 and the air blowing nozzle 5 to remove dust from the air duct 2, turn on the power switch after 10 seconds, connect the graphite electrode 3 to one electrode of the DC power supply, turn on the circuit switch after 15 seconds, turn off the circuit switch of the conductive layer after 45 seconds, turn off the air blowing nozzle 5 and the vibration motor 6 after 60 seconds, turn off the power switch after 70 seconds, and cut off the power to the graphite electrode 3 to start the dust concentration detection work.

[0067] The vibration motor 6 drives the air duct 2 to vibrate, helping to remove dust from the inner wall of the air duct 2 and facilitating cleaning of the air duct 2. A gap is maintained between the graphite electrode 3 and the side wall of the air duct 2, and a rubber pad is provided at the connection between the ceramic bracket 11 and the graphite electrode 3 to prevent vibration from affecting the structural stability of the graphite electrode 3. This also prevents the operation of the suction fan 4 and the air nozzle 5 from causing the ceramic bracket 11 to shake, which could affect the structural stability of the graphite electrode 3.

[0068] Example 2, reference Figure 1-Figure 4 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0069] A transparent cylindrical glass tube serves as the air duct 2. A magnetic induction brush system is also provided. The magnetic induction brush system includes a rotating mechanism disposed outside the glass tube and rotating around it. A brush mechanism 9 is disposed within the glass tube and rotates in close proximity to the inner wall of the glass tube. The rotating mechanism includes a first permanent magnet module 102 that rotates in close proximity to the outer wall of the glass tube. The brush mechanism 9 includes a second permanent magnet module 101 that rotates in close proximity to the inner wall of the glass tube. Both the first and second permanent magnet modules 102, 101 utilize a Halbach magnet arrangement. Both the first and second permanent magnet modules 102, 101 utilize a Halbach magnet arrangement along the length of the glass tube. The width of the first and second permanent magnet modules 102, 101 is less than 1 mm. The first and second permanent magnet modules 102, 101 form a magnetically coupled double Halbach structure. The magnetic induction brush system facilitates brush cleaning of dust from the inner wall of the glass tube, maintaining the cleanliness of the air duct 2. The second permanent magnet module 101 is driven by the first permanent magnet module 102. The double Halbach structure realizes magnetic linkage to drive the brush mechanism 9 to rotate, avoiding the need to set complex mechanical transmission components in the tube, reducing resistance and wear, and facilitating long-term stable operation.

[0070] The graphite electrode 3 is provided with a wind shield 31, located at one end of the graphite electrode 3 near the air inlet. The wind shield 31 blocks the airflow from the air nozzle 5 that is directed directly onto the graphite electrode 3. The wind shield 31 is conical in shape, with the tip of the conical wind shield 31 facing the direction of the air from the air nozzle 5. The wind shield 31 blocks the airflow from the air nozzle 5 that is directed directly onto the graphite electrode 3, protecting the graphite electrode 3 from direct impact and damage from the high-pressure airflow. The conical structure guides the airflow, reduces the generation of eddies, and ensures smooth airflow within the air duct 2. This reduces direct wind impact on the graphite electrode 3, creates a more stable working environment for the graphite electrode 3, and reduces vibration or displacement of the graphite electrode 3 caused by airflow.

[0071] At least two fixing rings 33 are arranged along the trajectory of the graphite electrode 3 ; the diameter of the fixing ring 33 is larger than the outer diameter of the graphite electrode 3 . The fixing ring 33 improves the structural stability of the graphite electrode 3 .

[0072] The graphite electrode 3 is further provided with grooves arranged along the trajectory of the graphite electrode 3. The grooves increase the surface area of ​​the graphite electrode 3, further improving the effect of adsorbing dust.

[0073] A polyurethane sponge strip 32 is provided in the groove, and the width of the sponge strip 32 is at least twice the depth of the groove. The rich micropores of the sponge can capture fine dust, dust and other particles, thereby improving the dust collection efficiency.

[0074] The sponge strip 32 is provided with a woven mesh of aluminum wire. Aluminum wire is lightweight and corrosion-resistant, and has good conductivity and ductility. It is woven into the sponge in a grid-like pattern to ensure uniform distribution, maintain the stability of the sponge structure, and provide electrostatic adsorption capabilities.

[0075] Four graphite electrodes 3 are inserted into the air duct 2, and the four graphite electrodes 3 are arranged in a square and inserted into the air duct 2. The multiple graphite electrodes 3 increase the area for adsorbing dust and improve the efficiency of dust adsorption.

[0076] When in use, a transparent cylindrical glass tube is used as wind. The brush mechanism 9 of the magnetic induction brush system drives the first permanent magnet module 102 to rotate through the rotating mechanism. The rotation of the first permanent magnet module 102 drives the second permanent magnet module 101 to rotate, so that the brush mechanism 9 rotates to clean the inner wall of the glass tube.

[0077] The wind shield 31 on the graphite electrode 3 is a conical wind shield 31. The conical wind shield 31 blocks the air flow from the air blowing nozzle 5 from directly hitting the graphite electrode 3, protecting the graphite electrode 3 from direct impact and damage from the high-pressure air flow. The sponge strip 32 in the graphite electrode 3 can capture fine dust, dust and other particles, improving the efficiency of dust absorption.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A dust isolation sensor with a self-cleaning function, comprising a box body (1), wherein the box body (1) is provided with an air duct (2) through which air flows, wherein the air duct (2) has an air inlet and an air outlet, and further comprising a light-emitting component (7) for irradiating the air flow in the air duct (2) and a light-sensing component (8) for generating scattered light after receiving light irradiating dust, characterized in that: A graphite electrode (3) is inserted into the channel through which the airflow of the air duct (2) passes, and the graphite electrode (3) is connected to an electrode of a DC power supply; The graphite electrode (3) is arranged along the air flow trajectory in the air duct (2), the length of the graphite electrode (3) is not less than two-thirds of the length of the air duct (2), and there is a gap between the graphite electrode (3) and the side wall of the air duct (2); The graphite electrode (3) avoids the irradiation area of ​​the light of the light-emitting component (7), and the graphite electrode (3) also avoids the sensing area of ​​the photosensitive component (8); The diameter of the graphite electrode (3) is less than one quarter of the minimum inner diameter of the air duct (2); The graphite electrode (3) is provided with pores with a diameter of 0.1-0.2 mm; It also includes an air intake fan (4), wherein the air intake port of the air intake fan (4) faces the air outlet of the air duct (2); It also includes a vibration motor (6), the vibration motor (6) is installed on the outer wall of the air duct (2), and the vibration of the vibration motor (6) drives the air duct (2) to vibrate; It also includes an air blowing nozzle (5), the air blowing nozzle (5) includes an air inlet and an air blowing port, the air blowing nozzle is oriented toward the inner cavity of the air duct (2), the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air; The box body (1) is connected to a ceramic bracket (11), and the ceramic bracket (11) supports the graphite electrode (3); The portion where the ceramic bracket (11) is connected to the graphite electrode (3) is padded with a rubber pad; The outer wall of the air duct (2) is provided with a conductive layer of copper material, and the conductive layer is connected to the other electrode of the DC power supply; A DC power supply is connected to the conductive layer via a pulse circuit, wherein a circuit switch is provided on the pulse circuit. When the circuit switch is turned on, the DC power supply and the conductive layer are connected, and when the circuit switch is turned off, the conductive layer is grounded. The conductive layer has an electrical polarity opposite to that of the graphite electrode (3); The graphite electrode (3) is provided with a wind shield (31), and the wind shield (31) is provided at one end of the graphite electrode (3) close to the air inlet; The wind shield (31) blocks the airflow from the air blowing nozzle (5) that is directed toward the graphite electrode (3); The wind shield (31) is a conical wind shield (31), and the tip of the conical wind shield (31) faces the blowing direction of the air blowing nozzle (5); The outer surface of the graphite electrode (3) is further provided with grooves arranged along the length of the graphite electrode (3); A polyurethane sponge strip (32) is provided in the groove, and the width of the sponge strip (32) is at least twice the depth of the groove.

2. The dust isolation sensor with self-cleaning function according to claim 1, characterized in that: A transparent cylindrical glass tube is used as an air duct (2); A magnetic induction brush system is also provided; The magnetic induction brush system includes a rotating mechanism arranged outside the glass tube and rotating around the glass tube; The glass tube is provided with a brush mechanism (9) that rotates close to the inner wall of the glass tube; The rotating mechanism is provided with a first permanent magnet module (102) that is close to the outer wall of the glass tube and rotates; The brush mechanism (9) is provided with a second permanent magnet module (101) that is attached to the inner wall of the glass tube and rotates; The first permanent magnet module (102) and the second permanent magnet module (101) both adopt a Halbach structure magnet arrangement; The first permanent magnet module (102) and the second permanent magnet module (101) both adopt a Halbach structure arranged along the length direction of the glass tube; The width of the first permanent magnet module (102) and the second permanent magnet module (101) is less than 1 mm; The first permanent magnet module (102) and the second permanent magnet module (101) form a magnetically coupled double Halbach structure.

3. The dust isolation sensor with self-cleaning function according to claim 1, characterized in that: At least two fixing rings (33) are arranged along the upper portion of the graphite electrode (3); The diameter of the fixing ring (33) is greater than the outer diameter of the graphite electrode (3).

4. The dust isolation sensor with self-cleaning function according to claim 1, characterized in that: A woven mesh made of aluminum wire is provided in the sponge strip (32).

5. The dust isolation sensor with self-cleaning function according to claim 1, characterized in that: Four graphite electrodes (3) are inserted into the air duct (2), and the four graphite electrodes (3) are inserted into the air duct (2) in a square arrangement.

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