Water filtering liquid level sensing mechanism

Abstract

The invention relates to the technical field of industrial cleaning equipment, in particular to a water filtering liquid level sensing mechanism which comprises an air suction opening, a liquid level fixing part is in threaded connection with the bottom in the air suction opening, the top of the surface of the liquid level fixing part is sleeved with a quick-release cotton cover, and the quick-release cotton cover is connected with the air suction opening through a rotating buckle. A composite filtering assembly is arranged in the quick-release cotton cover, the surface of the liquid level fixing part is sleeved with a floating cover, the bottom of the interior of the liquid level fixing part is in threaded connection with a limiting base, the top of the limiting base makes contact with the floating cover, the bottom of the quick-release cotton cover is in bolted connection with a warning assembly, and the warning assembly is used in cooperation with the floating cover. The bottom of the surface of the liquid level fixing piece is slidably sleeved with a liquid level sensor, and one end of the liquid level sensor is electrically connected with a wire harness. The water filtering liquid level sensing mechanism provided by the invention has three protection structures, and through the design of the liquid level sensor, the floating cover and the filter cotton, the air suction motor is fully protected, and the advantage of preventing water from entering the air suction motor is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial cleaning equipment, and particularly to a water filtering liquid level sensing mechanism. Background Art

[0002] As is well known, an industrial floor washer is a cleaning device suitable for cleaning smooth hard floors and then sucking up the sewage on the floor.

[0003] At present, in domestic industrial cleaning equipment, the liquid level sensing method for the sewage tank mostly uses a float cage or a liquid level sensor alone to control the water level of the sewage tank. Due to the limitation of the structure of the float cage, bumps or water vapor evaporation during the operation of the floor washer may cause some water to enter the suction duct from the float cage and drip onto the suction motor. Long-term dripping may cause corrosion and damage to the suction motor, and it will also drip onto the battery and corrode the battery. Summary of the Invention

[0004] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a water filtering liquid level sensing mechanism with three protection structures. Through the design of a liquid level sensor, a floating cover and filter cotton, the suction motor is fully protected, achieving the advantage of preventing water from entering.

[0005] (II) Technical Solutions The above technical object of the present invention is achieved through the following technical solutions: A water filtering liquid level sensing mechanism includes a suction port. The bottom inside the suction port is threadedly connected with a liquid level fixing part, and the top of the surface of the liquid level fixing part is sleeved with a quick-release cotton cover. The quick-release cotton cover is connected to the suction port through a rotating buckle. A composite filtering component is arranged inside the quick-release cotton cover. The surface of the liquid level fixing part is sleeved with a floating cover, and the bottom inside the liquid level fixing part is threadedly connected with a limit seat. The top of the limit seat contacts the floating cover. The bottom of the quick-release cotton cover is bolted with a warning component, and the warning component is used in cooperation with the floating cover. The bottom of the surface of the liquid level fixing part is slidably sleeved with a liquid level sensor. One end of the liquid level sensor is electrically connected with a wire harness, and the other end of the wire harness reaches outside the water tank through the suction port and is connected to the start / stop button of the suction motor.

[0006] With the above technical solution, by setting up a composite filter component and adopting a multi-layer filter structure with different functions, it can comprehensively and efficiently filter the inhaled substances, effectively intercept dust, impurities, water vapor, etc., greatly reducing the damage risk of these substances to components such as the suction fan motor, extending the service life of the equipment. And through the warning component, when the liquid level sensor fails, the floating cover can play the role of replacing the liquid level sensor. At this time, the equipment will vibrate, and the sound of the suction fan motor will change significantly, which can remind the user to perform the next operation. At the same time, this device has 3 protection structures. Through the design of the liquid level sensor, floating cover and filter cotton, it fully protects the suction fan motor and has the advantage of preventing it from getting water. Moreover, the entire structure combines electronic signals with traditional structures, enhancing the comprehensive performance of the product, with strong structural integrity and beautiful appearance.

[0007] The present invention is further configured as: the liquid level fixing member includes a stainless steel hollow column, the top of the surface of the stainless steel hollow column is sleeved with an external thread ring, a support cylinder is bolted inside the external thread ring, and the external thread ring is threadedly connected to the air suction port. The liquid level sensor is slidably sleeved on the surface of the stainless steel hollow column. Two locking nuts are threadedly connected to the surface of the stainless steel hollow column, and the side of the locking nut close to the support cylinder is in close contact with it. The quick-release cotton cover and the floating cover are both sleeved on the surface of the support cylinder.

[0008] With the above technical solution, by setting up the liquid level fixing member, the stainless steel hollow column serves as the main body of the liquid level fixing member. The external thread ring is threadedly connected to the air suction port to achieve overall fixation. The liquid level sensor slides on the surface of the stainless steel hollow column, and the sensing liquid level height can be adjusted as needed. The two locking nuts fix the position of the liquid level sensor, while the quick-release cotton cover and the floating cover are sleeved on the surface of the support cylinder, restricting the installation positions of the quick-release cotton cover and the floating cover and facilitating the connection between structures.

[0009] The present invention is further configured as: the composite filter component includes a primary metal filter screen, a medium fiber filter layer, and a high-efficiency activated carbon adsorption layer. The primary metal filter screen, the medium fiber filter layer, and the high-efficiency activated carbon adsorption layer are stacked from top to bottom inside the quick-release cotton cover. A cleaning member is arranged at the top of the primary metal filter screen, and the bottom of the cleaning member is in rotational contact with the primary metal filter screen.

[0010] With the above technical solution, by setting a composite filter component, substances such as inhaled air sequentially pass through a primary metal filter screen, a medium - efficiency fiber filter layer, and a high - efficiency activated carbon adsorption layer. The primary metal filter screen first intercepts large - particle impurities, the medium - efficiency fiber filter layer further filters fine particles, and the high - efficiency activated carbon adsorption layer adsorbs water vapor and odors. And the cleaning part cleans the primary metal filter screen at a certain stage of the equipment operation. Through the multi - layer structure design of the composite filter component, efficient and fine filtration of the inhaled substances is achieved, effectively protecting equipment such as the suction fan motor from impurities and water vapor, and improving the reliability and service life of the equipment.

[0011] The present invention is further configured as: the cleaning part includes a fixed shell, the fixed shell is arranged on the top of the primary metal filter screen, a face gear ring is bolted to the bottom of the inner wall of the fixed shell, a gear is meshed and connected to the top of the face gear ring, and connecting shafts are bolted to both sides of the gear. A connecting plate is sleeved on the surface of the connecting shaft. A scraper is arranged at the bottom of the fixed shell, and the bottom of the scraper is in rotational contact with the primary metal filter screen. The bottom of the connecting plate extends to the bottom of the fixed shell and is connected to the scraper.

[0012] With the above technical solution, by setting the cleaning part, when the equipment runs to the set time or condition, the cleaning part starts. The gear meshes and rotates and displaces with the face gear ring under the drive of power, and drives the connecting plate to displace through the connecting shaft, and then makes the scraper rotate on the surface of the primary metal filter screen, scraping the intercepted impurities towards the impurity discharge port. Through the gear transmission, automatic cleaning of the primary metal filter screen by the scraper is realized, keeping the filter layer unobstructed, reducing the manual maintenance workload, and improving the working efficiency and service life of the filter component.

[0013] The present invention is further configured as: an impurity discharge port is opened at the front side inside the primary metal filter screen, and the impurity discharge port is used in cooperation with the scraper. A discharge channel is communicated with the bottom of the impurity discharge port, and the front end of the discharge channel extends to the outside of the quick - release cotton cover.

[0014] With the above technical solution, through the setting of the impurity discharge port and the discharge channel, a discharge path is provided for the cleaned impurities, avoiding the accumulation of impurities in the composite filter component, ensuring the continuous and efficient progress of the filtration process, and further improving the performance of the filter component.

[0015] The present invention is further configured as: the warning component includes a fixed ring, the fixed ring is bolted to the bottom of the quick - release cotton cover, and a protective shell is annularly bolted inside the fixed ring. A rotating shaft is rotatably connected inside the protective shell, and an eccentric block is sleeved on the surface of the rotating shaft. Trigger parts are bolted to the front side and the rear side inside the fixed ring, and the trigger parts are used in cooperation with the floating cover.

[0016] By adopting the above technical solution and setting up a warning component, when the liquid level sensor fails, the floating cover moves to a certain position due to the rising water level and contacts the trigger component, which can activate the trigger component and make the driving device built into the protective shell drive the rotating shaft to rotate, and drive the eccentric block to rotate, so that the equipment vibrates, ensuring that the operator can perceive the abnormality of the equipment in time, and remind the operator in an intuitive and obvious way that the liquid level sensing system of the equipment has a fault, so that the operator can respond quickly.

[0017] The present invention is further configured as follows: the trigger member includes a support plate, the side of the support plate close to the inner wall of the fixed ring is bolted to the support plate, the side of the support plate away from the inner wall of the fixed ring is bolted to a shell, a movable plate is slidably arranged inside the shell, the top of the movable plate and the top of the inner wall of the shell are respectively bolted with a moving contact and a static contact, and the moving contact is used in conjunction with the static contact, the bottom of the movable plate is bolted with a moving column, and an elastic sheet is arranged at the bottom of the moving column, and the elastic sheet is connected to the side of the support plate close to the support plate.

[0018] By adopting the above technical solution, a triggering member is set, and during the rising process of the floating cover, the end of the elastic sheet will be pushed to deform and squeeze the moving column, so that the moving column can drive the moving plate to slide upward in the shell, so that the moving contact contacts the static contact, the circuit is turned on, and the eccentric block is triggered to rotate. The structural design of the triggering member ensures the sensitivity and reliability of the trigger, and the circuit is turned on through the linkage of the mechanical structure, thereby triggering the alarm, providing a stable triggering mechanism for the normal operation of the alarm component.

[0019] The present invention is further configured as follows: a silicone pad is provided on the top of the floating cover, and the floating cover is used in conjunction with the elastic sheet through the silicone pad, and the diameter of the silicone pad is consistent with that of the fixing ring.

[0020] By adopting the above technical solution, a silicone pad is set, which can contact and squeeze the elastic sheet on the one hand, causing the moving column to be displaced, thereby triggering the action of the warning component. On the other hand, since the diameters of the silicone pad and the fixed ring are consistent, when the silicone pad contacts the fixed ring, the channel for inhaled air will be reduced. Therefore, the suction motor needs to overcome greater resistance and the load of the motor increases. According to the working principle of the motor, when the load increases, the current of the motor will increase, and the electromagnetic force inside the motor will change, resulting in an increase in the vibration and noise generated when the motor is running, thereby causing obvious changes in the sound of the motor, such as the sound becoming noisier and the volume increasing. In this way, the user is reminded in a dual way that the device has an abnormal situation and needs to proceed to the next step.

[0021] The present invention is further configured as follows: guide pillars are passed through both sides of the movable plate, and the side of the guide pillars close to the inner wall of the shell is connected to it, a return spring is sleeved on the top of the surface of the guide pillars, and the side of the return spring close to the inner wall of the shell and the movable plate are respectively connected to the two.

[0022] With the above technical solution, through the arrangement of the guide posts and the return springs, the smooth movement of the moving plate and the timeliness of return are ensured, enabling the trigger member to trigger reliably multiple times, prolonging the service life of the warning assembly, and improving the reliability of the equipment.

[0023] The present invention is further configured as follows: a plurality of through holes are formed in the bottom inside the quick-release cotton cover, and the through holes are annularly distributed.

[0024] With the above technical solution, the smooth flow of the filtered substance is ensured through the arrangement of the through holes, and the annular distribution helps to evenly intake air, ensuring smooth air flow in the entire water filtration level sensing mechanism and not affecting the normal operation of the equipment.

[0025] (III) Beneficial effects Compared with the prior art, the present invention provides a water filtration level sensing mechanism, which has the following beneficial effects: In this water filtration level sensing mechanism, by setting a composite filtration component and adopting a multi-layer filtration structure with different functions, it can comprehensively and efficiently filter the inhaled substances, effectively intercepting dust, impurities, water vapor, etc., greatly reducing the damage risk of these substances to components such as the suction fan motor, prolonging the service life of the equipment, and through the warning assembly, when the liquid level sensor fails, the floating cover can play the role of replacing the liquid level sensor. At this time, the equipment will vibrate, and the sound of the suction fan motor will change significantly, which can remind the user to perform the next operation. At the same time, this device has 3 protection structures. Through the design of the liquid level sensor, the floating cover and the filter cotton, the suction fan motor is fully protected, achieving the advantage of preventing it from getting water. Moreover, the entire structure combines electronic signals with traditional structures, enhancing the comprehensive performance of the product, with strong structural integrity and beautiful appearance. Brief description of the drawings

[0026] Figure 1 It is a schematic diagram of the overall structure in the present invention; Figure 2 It is an exploded schematic diagram of the overall structure in the present invention; Figure 3 It is a schematic diagram of the structure of the liquid level fixing member in the present invention; Figure 4 It is a connection schematic diagram of the composite filtration component and the quick-release cotton cover in the present invention; Figure 5 It is a schematic diagram of the structure of the cleaning member in the present invention; Figure 6 It is a schematic diagram of the structure of the warning assembly in the present invention; Figure 7 It is a connection schematic diagram of the trigger member and the fixing ring in the present invention.

[0027] In the figure: 1. Air suction port; 2. Liquid level fixing part; 21. Stainless steel hollow column; 22. External thread ring; 23. Support cylinder; 24. Locking nut; 3. Quick-release cotton cover; 4. Composite filter component; 41. Primary metal filter screen; 42. Intermediate fiber filter layer; 43. High-efficiency activated carbon adsorption layer; 44. Cleaning part; 441. Fixed shell; 442. End face gear ring; 443. Gear; 444. Connecting shaft; 445. Connecting plate; 446. Scraper; 5. Floating cover; 6. Limit seat; 7. Warning component; 71. Fixed ring; 72. Protective shell; 73. Rotating shaft; 74. Eccentric block; 75. Trigger part; 751. Support plate; 752. Shell; 753. Moving plate; 754. Moving contact; 755. Static contact; 756. Moving column; 757. Elastic sheet; 8. Liquid level sensor; 9. Wiring harness; 10. Impurity discharge port; 11. Impurity discharge channel; 12. Silicone pad; 13. Guide post; 14. Return spring; 15. Through hole. Detailed implementation mode

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0029] Please refer to Figures 1-5 , a water filtration liquid level sensing mechanism, including an air suction port 1, the bottom inside the air suction port 1 is threadedly connected with a liquid level fixing part 2, and the top of the surface of the liquid level fixing part 2 is sleeved with a quick-release cotton cover 3. The quick-release cotton cover 3 is connected to the air suction port 1 through a rotating buckle. A composite filter component 4 is arranged inside the quick-release cotton cover 3. The surface of the liquid level fixing part 2 is sleeved with a floating cover 5, and the bottom inside the liquid level fixing part 2 is threadedly connected with a limit seat 6. The top of the limit seat 6 contacts the floating cover 5. The bottom of the quick-release cotton cover 3 is bolted with a warning component 7, and the warning component 7 is used in cooperation with the floating cover 5. The bottom of the surface of the liquid level fixing part 2 is slidably sleeved with a liquid level sensor 8. One end of the liquid level sensor 8 is electrically connected with a wiring harness 9, and the other end of the wiring harness 9 reaches outside the water tank through the air suction port 1 and is connected to the start-stop button of the air suction motor.

[0030] Among them, the liquid level fixing member 2 includes a stainless steel hollow column 21. An external thread ring 22 is sleeved on the top of the surface of the stainless steel hollow column 21. A support cylinder 23 is bolted inside the external thread ring 22, and the external thread ring 22 is threadedly connected to the air suction port 1. The liquid level sensor 8 is slidably sleeved on the surface of the stainless steel hollow column 21. Two locking nuts 24 are threadedly connected to the surface of the stainless steel hollow column 21, and one side of the locking nut 24 close to the support cylinder 23 is in close contact with it. The quick-release cotton cover 3 and the floating cover 5 are both sleeved on the surface of the support cylinder 23. By setting the liquid level fixing member 2, the stainless steel hollow column 21 serves as the main body of the liquid level fixing member 2, and the threaded connection between the external thread ring 22 and the air suction port 1 realizes overall fixation. The liquid level sensor 8 slides on the surface of the stainless steel hollow column 21, and the sensing liquid level height can be adjusted as needed. The two locking nuts 24 fix the position of the liquid level sensor 8, while the quick-release cotton cover 3 and the floating cover 5 are sleeved on the surface of the support cylinder 23, restricting the installation positions of the quick-release cotton cover 3 and the floating cover 5 and facilitating the connection between structures.

[0031] Among them, the composite filter component 4 includes a primary metal filter screen 41, a medium-effect fiber filter layer 42, and a high-efficiency activated carbon adsorption layer 43. The primary metal filter screen 41, the medium-effect fiber filter layer 42, and the high-efficiency activated carbon adsorption layer 43 are arranged in a stacked manner from top to bottom inside the quick-release cotton cover 3. A cleaning member 44 is arranged at the top of the primary metal filter screen 41, and the bottom of the cleaning member 44 is in rotational contact with the primary metal filter screen 41. By setting the composite filter component 4, substances such as inhaled air pass through the primary metal filter screen 41, the medium-effect fiber filter layer 42, and the high-efficiency activated carbon adsorption layer 43 in sequence. The primary metal filter screen 41 first intercepts large-particle impurities, the medium-effect fiber filter layer 42 further filters fine particles, and the high-efficiency activated carbon adsorption layer 43 adsorbs water vapor and odors. The cleaning member 44 cleans the primary metal filter screen 41 at a certain stage of equipment operation. Through the multi-layer structure design of the composite filter component 4, high-efficiency and fine filtration of inhaled substances are achieved, effectively protecting equipment such as the air suction motor from impurities and water vapor, and improving the reliability and service life of the equipment.

[0032] Among them, the cleaning part 44 includes a fixed shell 441 which is arranged on the top of the primary metal filter screen 41. At the bottom of the inner wall of the fixed shell 441, an end face gear ring 442 is bolted. At the top of the end face gear ring 442, a gear 443 is meshed and connected. On both sides of the gear 443, connecting shafts 444 are bolted. A connecting plate 445 is sleeved on the surface of the connecting shaft 444. At the bottom of the fixed shell 441, a scraper 446 is arranged, and the bottom of the scraper 446 is in rotational contact with the primary metal filter screen 41. The bottom of the connecting plate 445 extends to the bottom of the fixed shell 441 and is connected with the scraper 446. By setting the cleaning part 44, when the equipment runs to the set time or condition, the cleaning part 44 starts. The gear 443 meshes and rotates and displaces with the end face gear ring 442 under the drive of power, and drives the connecting plate 445 to displace through the connecting shaft 444, so that the scraper 446 rotates on the surface of the primary metal filter screen 41, and scrapes the intercepted impurities towards the impurity discharge port 10. Through the transmission of the gear 443, the automatic cleaning of the primary metal filter screen 41 by the scraper 446 is realized, the filter layer is kept unobstructed, the manual maintenance workload is reduced, and the working efficiency and service life of the filter component are improved.

[0033] Among them, an impurity discharge port 10 is opened at the front side inside the primary metal filter screen 41, and the impurity discharge port 10 is used in cooperation with the scraper 446. The bottom of the impurity discharge port 10 is communicated with an impurity discharge channel 11, and the front end of the impurity discharge channel 11 extends to the outside of the quick-release cotton cover 3. Through the arrangement of the impurity discharge port 10 and the impurity discharge channel 11, a discharge path is provided for the impurities cleaned down, the accumulation of impurities in the composite filter component 4 is avoided, the continuous and efficient progress of the filtering process is ensured, and the performance of the filter component is further improved.

[0034] Among them, a plurality of through holes 15 are opened at the bottom inside the quick-release cotton cover 3, and the through holes 15 are distributed in a ring shape. Through the arrangement of the through holes 15, the smooth flow of the filtered substance is ensured. At the same time, the ring-shaped distribution helps to evenly introduce air, ensuring the smooth air flow of the entire water filtration level sensing mechanism and not affecting the normal operation of the equipment.

[0035] Working principle of this embodiment: When the device is running, substances such as air are inhaled from the air suction port 1 and sequentially pass through the primary metal filter screen 41, the intermediate fiber filter layer 42, and the high-efficiency activated carbon adsorption layer 43 of the composite filter assembly 4. The primary metal filter screen 41 intercepts large particle impurities, the intermediate fiber filter layer 42 filters fine particles, and the high-efficiency activated carbon adsorption layer 43 adsorbs water vapor and odors. The air and other substances after fine filtration continue to flow. During this process, when the water level in the sewage tank gradually rises and reaches the height set by the liquid level sensor 8, the liquid level sensor 8 senses the signal and transmits it to the air suction motor start-stop button through the wire harness 9, causing the air suction motor to cut off power and stop the sewage suction operation, preventing the sewage in the sewage tank from overflowing. After the device runs for a certain period of time or reaches the set filtration time threshold, the cleaning member 44 starts. The gear 443 meshes and rotates with the end face gear ring 442 under the drive of power and displaces, and drives the connecting plate 445 to displace through the connecting shaft 444, so that the scraper 446 rotates on the surface of the primary metal filter screen 41, scraping the intercepted impurities towards the impurity discharge port 10, and the impurities are discharged outside the quick-release cotton cover 3 through the impurity discharge channel 11, keeping the primary metal filter screen 41 unobstructed. Embodiment 2

[0036] Reference Figures 6-7 , a water filtration liquid level sensing mechanism further includes a warning component 7. Among them, the warning component 7 includes a fixing ring 71, the fixing ring 71 is bolted to the bottom of the quick-release cotton cover 3, and a protective shell 72 is bolted in a ring shape inside the fixing ring 71. A rotating shaft 73 is rotatably connected inside the protective shell 72, and an eccentric block 74 is sleeved on the surface of the rotating shaft 73. Trigger members 75 are bolted to the front side and the rear side inside the fixing ring 71, and the trigger members 75 are used in cooperation with the floating cover 5. By setting the warning component 7, when the liquid level sensor 8 fails, when the floating cover 5 moves to a certain position due to the rising water level, it will contact the trigger member 75, which can cause the trigger member 75 to act and drive the driving device built in the protective shell 72 to drive the rotating shaft 73 to rotate, and drive the eccentric block 74 to rotate, so that the device generates vibration, ensuring that the operator can timely perceive the abnormality of the device, and reminding the operator in an intuitive and obvious way that the liquid level sensing system of the device has a fault, which is convenient for the operator to make a quick response.

[0037] Among them, the trigger 75 includes a support plate 751, one side of the support plate 751 close to the inner wall of the fixed ring 71 is bolted thereto, a housing 752 is bolted to the side of the support plate 751 away from the inner wall of the fixed ring 71, a moving plate 753 is slidably arranged inside the housing 752, a moving contact 754 and a static contact 755 are respectively bolted to the top of the moving plate 753 and the top of the inner wall of the housing 752, and the moving contact 754 and the static contact 755 are used in cooperation. A moving column 756 is bolted to the bottom of the moving plate 753, and an elastic sheet 757 is arranged at the bottom of the moving column 756. One side of the elastic sheet 757 close to the support plate 751 is connected thereto. By arranging the trigger 75, during the rising process of the floating cover 5, the end of the elastic sheet 757 will be pushed to deform and squeeze the moving column 756, so that the moving column 756 can drive the moving plate 753 to slide upward in the housing 752, making the moving contact 754 contact the static contact 755, the circuit is turned on, triggering the eccentric block 74 to rotate. The structural design of the trigger 75 ensures the sensitivity and reliability of the trigger, realizes the circuit conduction through the linkage of the mechanical structure, and further triggers the warning, providing a stable trigger mechanism for the normal operation of the warning assembly 7.

[0038] Among them, a silica gel pad 12 is arranged on the top of the floating cover 5, and the floating cover 5 is used in cooperation with the elastic sheet 757 through the silica gel pad 12. The silica gel pad 12 is consistent with the diameter of the fixed ring 71. By arranging the silica gel pad 12, on the one hand, it can contact and squeeze the elastic sheet 757 to cause displacement of the moving column 756, achieving the effect of triggering the action of the warning assembly 7. On the other hand, since the silica gel pad 12 and the fixed ring 71 have the same diameter, when the silica gel pad 12 contacts the fixed ring 71, the air intake channel will be reduced, so the air suction motor needs to overcome greater resistance, and the load of the motor increases. According to the working principle of the motor, when the load increases, the current of the motor will increase, and the electromagnetic force inside the motor changes, resulting in an increase in the vibration and noise generated during the operation of the motor, so that the sound of the motor changes significantly, such as the sound becoming more noisy and the volume increasing, etc., thereby reminding the user of abnormal conditions of the device in a dual way and requiring the user to perform the next operation.

[0039] Among them, guide columns 13 penetrate through both sides inside the moving plate 753, and one side of the guide columns 13 close to the inner wall of the housing 752 is connected thereto. A return spring 14 is sleeved on the top surface of the guide columns 13. One side of the return spring 14 close to the inner wall of the housing 752 and the moving plate 753 is connected to both of them respectively. Through the arrangement of the guide columns 13 and the return spring 14, the smooth movement and timely reset of the moving plate 753 are guaranteed, enabling the trigger 75 to be triggered reliably multiple times, extending the service life of the warning assembly 7, and improving the reliability of the device.

[0040] Working principle of this embodiment: When the liquid level sensor 8 fails, the water level in the sewage tank rises, causing the floating cover 5 to move upward. The silica gel pad 12 on the top of the floating cover 5 contacts and presses the elastic piece 757 of the trigger member 75, and the deformation of the end of the elastic piece 757 drives the moving column 756 to move upward. The moving column 756 drives the moving plate 753 to slide upward in the housing 752 against the elastic force of the return spring 14. The guide post 13 plays a guiding role to ensure the stable movement of the moving plate 753. When the moving plate 753 moves to a certain position, the moving contact 754 contacts the static contact 755, and the circuit is turned on. After the circuit is turned on, the driving device (such as a small motor) in the protective shell 72 starts, driving the rotating shaft 73 to rotate. The rotating shaft 73 drives the eccentric block 74 to rotate. The rotation of the eccentric block 74 generates an unbalanced force, causing the device to vibrate. At the same time, since the silica gel pad 12 contacts the fixed ring 71, the air intake channel changes, the load of the air suction motor increases, and the sound of the motor changes significantly. The operator is reminded of the failure of the liquid level sensing system of the device through the dual methods of vibration and sound changes. When the operator finishes dealing with the failure, the water level in the sewage tank drops, the floating cover 5 no longer presses the elastic piece 757, the elastic piece 757 returns to its original state, pushing the moving column 756 and the moving plate 753 to move downward. The return spring 14 also returns to its original state, further assisting the moving plate 753 to reset. The moving plate 753 drives the moving contact 754 to move downward and separate from the static contact 755. The circuit is disconnected, causing the eccentric block 74 to stop rotating, and the vibration of the device can stop. The warning assembly 7 returns to the initial state and waits for the next trigger.

[0041] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment as needed after reading this specification. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water filtering liquid level sensing mechanism, comprising an air suction port (1), characterized in that: At the bottom inside the air suction port (1), there is a liquid level fixing part (2) connected by thread, and at the top of the surface of the liquid level fixing part (2), there is a quick-release cotton cover (3) sleeved. The quick-release cotton cover (3) is connected to the air suction port (1) through a rotary buckle. Inside the quick-release cotton cover (3), there is a composite filter component (4). A floating cover (5) is sleeved on the surface of the liquid level fixing part (2), and at the bottom inside the liquid level fixing part (2), there is a limit seat (6) connected by thread. The top of the limit seat (6) contacts the floating cover (5). At the bottom of the quick-release cotton cover (3), there is a warning component (7) bolted, and the warning component (7) is used in cooperation with the floating cover (5). At the bottom of the surface of the liquid level fixing part (2), there is a liquid level sensor (8) slidably sleeved. One end of the liquid level sensor (8) is electrically connected to a wire harness (9), and the other end of the wire harness (9) reaches outside the water tank through the air suction port (1) and is connected to the start-stop button of the air suction motor.

2. The water filtration liquid level sensing mechanism according to claim 1, characterized in that: The liquid level fixing part (2) includes a stainless steel hollow column (21). At the top of the surface of the stainless steel hollow column (21), there is an external thread ring (22) sleeved. Inside the external thread ring (22), there is a support cylinder (23) bolted, and the external thread ring (22) is threadedly connected to the air suction port (1). The liquid level sensor (8) is slidably sleeved on the surface of the stainless steel hollow column (21). On the surface of the stainless steel hollow column (21), there are two locking nuts (24) threadedly connected, and the side of the locking nut (24) close to the support cylinder (23) is in close contact with it. Both the quick-release cotton cover (3) and the floating cover (5) are sleeved on the surface of the support cylinder (23).

3. The water filtration liquid level sensing mechanism according to claim 1, characterized in that: The composite filter component (4) includes a primary metal filter screen (41), a medium-effect fiber filter layer (42), and a high-effect activated carbon adsorption layer (43). The primary metal filter screen (41), the medium-effect fiber filter layer (42), and the high-effect activated carbon adsorption layer (43) are arranged in a stacked manner from top to bottom inside the quick-release cotton cover (3). At the top of the primary metal filter screen (41), there is a cleaning part (44), and the bottom of the cleaning part (44) is in rotational contact with the primary metal filter screen (41).

4. The water filtering liquid level sensing mechanism according to claim 3, characterized in that: The cleaning part (44) includes a fixed shell (441). The fixed shell (441) is arranged at the top of the primary metal filter screen (41). At the bottom of the inner wall of the fixed shell (441), there is an end face gear ring (442) bolted. At the top of the end face gear ring (442), there is a gear (443) meshed. On both sides of the gear (443), there are connecting shafts (444) bolted. On the surface of the connecting shaft (444), there is a connecting plate (445) sleeved. At the bottom of the fixed shell (441), there is a scraper (446), and the bottom of the scraper (446) is in rotational contact with the primary metal filter screen (41). The bottom of the connecting plate (445) extends to the bottom of the fixed shell (441) and is connected to the scraper (446).

5. A water filtration liquid level sensing mechanism according to claim 4, characterized in that: A waste discharge port (10) is formed in the front side inside the primary metal filter screen (41), and the waste discharge port (10) is used in cooperation with a scraper (446). The bottom of the waste discharge port (10) is communicated with a waste discharge channel (11), and the front end of the waste discharge channel (11) extends to the outside of the quick-release cotton cover (3).

6. The water filtration liquid level sensing mechanism according to claim 1, wherein: The warning component (7) includes a fixing ring (71). The fixing ring (71) is bolted to the bottom of the quick-release cotton cover (3), and a protective shell (72) is annularly bolted inside the fixing ring (71). A rotating shaft (73) is rotatably connected inside the protective shell (72), and an eccentric block (74) is sleeved on the surface of the rotating shaft (73). Trigger members (75) are bolted to the front side and the rear side inside the fixing ring (71), and the trigger members (75) are used in cooperation with the floating cover (5).

7. The water filtration liquid level sensing mechanism according to claim 6, wherein: The trigger member (75) includes a support plate (751). One side of the support plate (751) close to the inner wall of the fixing ring (71) is bolted thereto. A housing (752) is bolted to the side of the support plate (751) away from the inner wall of the fixing ring (71). A moving plate (753) is slidably arranged inside the housing (752). A moving contact (754) and a static contact (755) are respectively bolted to the top of the moving plate (753) and the top of the inner wall of the housing (752), and the moving contact (754) is used in cooperation with the static contact (755). A moving column (756) is bolted to the bottom of the moving plate (753), and an elastic sheet (757) is arranged at the bottom of the moving column (756). One side of the elastic sheet (757) close to the support plate (751) is connected thereto.

8. The water filtration liquid level sensing mechanism according to claim 7, characterized in that: A silica gel pad (12) is arranged on the top of the floating cover (5), and the floating cover (5) is used in cooperation with the elastic sheet (757) through the silica gel pad (12). The silica gel pad (12) is consistent with the fixing ring (71) in diameter.

9. A water filtration liquid level sensing mechanism according to claim 7, characterized in that: Guide columns (13) penetrate through both sides inside the moving plate (753), and one side of each guide column (13) close to the inner wall of the housing (752) is connected thereto. A return spring (14) is sleeved on the top of the surface of each guide column (13), and one side of the return spring (14) close to the inner wall of the housing (752) and the moving plate (753) is connected to the two respectively.

10. A water filtration liquid level sensing mechanism according to claim 1, characterized in that: A plurality of through holes (15) are formed in the bottom inside the quick-release cotton cover (3), and the through holes (15) are annularly distributed.

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