Wet type smoke hood purification device and control method thereof

Abstract

The invention discloses a wet-type smoke hood purification device and a control method thereof, and belongs to the technical field of air oil smoke removal purification. The wet-type smoke hood purification device comprises an electrostatic assembly and a smoke hood assembly, and the smoke hood assembly comprises a shell, a barrier plate, an air inlet grid plate, an air outlet grid plate, an air supplementing opening grid plate, a cover plate, a net plate and a water spraying system. The water spraying system capable of automatically supplementing water is arranged to keep the high liquid level of the water tank all the time; a tap water source is prevented from being polluted through the anti-backflow design of the check valve; through combination of the water tank, the water pump, the pipe joint and the screen plate, when the water pump runs, water is uniformly sprayed on the screen plate to form a flowing water curtain, a condensation effect is achieved when lampblack passes through the water curtain, and finally the cooling effect is achieved and the purification efficiency is guaranteed. When a fire disaster occurs, flames are sucked into the wet type smoke hood purification device, the flames firstly enter the baffle, the baffle can block most of the flames, a small part of the flames are sprayed to the cover plate, part of the flames are extinguished again, finally, the remaining flames enter the water curtain along with airflow, and the flames are completely extinguished.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, specifically to a wet fume hood purification device and its control method. Background Technology

[0002] Currently, the main technology used in air purification for oil fume removal is high-voltage electrostatic adsorption. High-voltage electrostatic adsorption technology has become the mainstream solution for fume hood purification equipment due to its relatively low power consumption, high purification efficiency, and the ability to clean and reuse the electric field unit, thus reducing long-term operating costs. However, existing fume hood purification equipment still faces many technical problems that urgently need to be solved: (1) Safety risks exist: The high voltage generated by the high voltage electrostatic device during operation itself poses a risk of igniting or exploding oil fumes. More seriously, the negative pressure fan that is matched with the equipment continuously draws in air during operation. Once an initial fire occurs, this airflow will quickly provide sufficient oxygen to the flame and accelerate the spread of the fire, significantly increasing the possibility and severity of the fire.

[0003] (2) Poor oil fume capture and sealing effect: Existing fume hood equipment generally has an unsatisfactory effect in capturing oil fumes (commonly known as "fumes"). During equipment operation, oil fumes often overflow from the edges or gaps of the fume hood, causing some oil fumes to escape into the kitchen environment or exhaust ducts without effective treatment. This not only seriously reduces the overall purification efficiency, but also deteriorates the working environment and may cause environmental pollution. In addition, in some equipment using wet purification technology, the water-blocking filter screen is ineffective and cannot effectively separate oil-water mixtures or prevent water mist from escaping, which also has a negative impact on the final purification effect.

[0004] (3) The existing wet fume hood products are not intelligently controlled. Water replenishment and drainage require manual operation, which wastes a lot of manpower during use. The water replenishment level needs to be manually observed and controlled, which affects the purification effect. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wet fume hood purification device and its control method, which solves the problems of safety risks, poor oil fume capture and sealing effect, and unintelligent control in the prior art.

[0006] To achieve the above objectives, the present invention is implemented using the following technical solution: This invention provides a wet fume hood purification device, including an electrostatic component and a fume hood component. The fume hood component includes a shell, a baffle plate, an air inlet grille, an air outlet grille, a makeup air inlet grille, a cover plate, a mesh plate, and a water spray system. The air inlet grille and air outlet grille are installed on the outer shell, forming a cavity inside the outer shell. The make-up air grille and the baffle plate are connected and installed inside the outer shell, dividing the cavity between the air inlet grille and the air outlet grille, forming a first cavity between the air inlet grille and the baffle plate and a remaining cavity. The cover plate and the mesh plate are connected and installed inside the outer shell, dividing the remaining cavity, forming a second cavity between the baffle plate and the cover plate, and a third cavity between the mesh plate and the air outlet grille. The flue gas enters the first cavity through the air inlet grille, then enters the second cavity through the baffle plate, then enters the third cavity through the mesh plate, and finally flows out through the air outlet grille. The water spraying system includes an inlet, an inlet valve, a check valve, a water level valve, a water tank, a drain valve, and a drain outlet connected in sequence to form a loop. It also includes a control module, a water pump, and a pipe connector. The pipe connector is connected to the water pump, which is placed inside the water tank. The control module controls the opening and closing of the inlet valve, the drain valve, and the water level valve according to the water level in the water tank, so that the water level in the water tank is not lower than the preset first water level. The water tank is connected to the outer shell and is located below the mesh plate. The water pump and pipe joint are used to spray water onto the mesh plate. The electrostatic component is installed outside the air outlet grille to provide driving force to form airflow, which drives the flue gas through the wet fume hood purification device.

[0007] Furthermore, a water-proof plate is installed between the air outlet grille and the electrostatic component. The water-proof plate includes a first panel, a second panel, and a guide plate. The guide plate is inclinedly disposed between the first panel and the second panel, and the projections of the guide plate relative to the first panel or the second panel overlap each other with an overlap width greater than or equal to 8mm.

[0008] Furthermore, the barrier plate has three sides with connected guide grooves. The barrier plate is inclined relative to the horizontal plane. The vertical height of the three sides with guide grooves on the barrier plate is higher than the side without guide grooves. The side of the barrier plate without guide grooves is located above the water tank. The guide grooves are used to collect oil droplets in the flue gas into the water tank.

[0009] Furthermore, the electrostatic component includes a power supply, an electric field, a fan, an ultraviolet lamp assembly, a pre-filter, and an electrical box. The primary filter is connected to the front end of the electric field and is used to remove large particles of oil fumes from the flue gas. The power source is located inside the electrical box and is used to provide high voltage to the electric field; The ultraviolet lamp assembly is connected to the back end of the electric field and is used to purify the odor in the flue gas. The fan is connected to the rear end of the ultraviolet lamp assembly and is used to provide driving force to form airflow, which drives the flue gas through the wet fume hood purification device.

[0010] Furthermore, the ionization voltage of the power supply is 12~15kV, and the dust collection voltage of the power supply is 6~7.5kV.

[0011] Furthermore, it also includes a status monitoring module and a communication module. The status monitoring module is used to monitor the water level in the tank, and the communication module is used to remotely transmit the monitoring data of the status monitoring module.

[0012] In a second aspect, the present invention provides a control method for the wet fume hood purification device as described in any one of the first aspects, comprising: Before purifying the flue gas, perform the following water replenishment procedure: open the inlet valve and the water level valve, close the drain valve, fill the water tank with water until the water level in the tank is not lower than the preset first water level, and then close the inlet valve and the water level valve. During the flue gas purification process, the following water control procedure is performed: open the inlet valve and the water level valve, close the drain valve, and fill the water tank with water so that the water level in the tank is not lower than the preset first water level. During the flue gas purification process, the following purification procedure is performed: the electrostatic component is turned on, which drives the flue gas from the inlet grille into the first chamber, then through the baffle plate into the second chamber, then through the mesh plate into the third chamber, and finally out through the outlet grille.

[0013] Furthermore, after the flue gas purification is completed, the following drainage process is performed: close the inlet valve and open the drain valve until all the water in the tank is drained.

[0014] Furthermore, during the flue gas purification process, the following timed water replenishment procedure is also performed: water is added to the water tank at preset time intervals.

[0015] Furthermore, it also includes: when the water level in the tank is higher than the preset second water level, or the liquid temperature in the tank is higher than the preset temperature, or the oil-water mixture concentration in the tank is higher than the preset concentration, and the wet fume hood purification device is not in working time, the drain valve is opened to discharge all the oil-water mixture in the wet fume hood purification device, the inlet valve is opened until the water level in the tank is not lower than the first water level, and the inlet valve is closed. The second water level is higher than the first water level.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The wet fume hood purification device and its control method provided by this invention, through the setting of an automatically replenishable water spray system, includes an inlet, an inlet valve, a check valve, a water level valve, a water tank, a drain valve, and a drain outlet connected in sequence to form a loop. It also includes a water pump and nozzles, with the nozzles connected to the water pump, which is placed in the water tank. The water level valve opens and closes according to the water level in the water tank, automatically replenishing water during use. Through the connection of the inlet, inlet valve, check valve, water level valve, and water tank, a high liquid level in the water tank is maintained at all times. Furthermore, the backflow prevention design of the check valve prevents contamination of the tap water source. The combination of the water tank, water pump, pipe joint, and mesh plate allows water to be evenly sprayed onto the mesh plate when the water pump is running, forming a flowing water curtain. When the oil fume passes through, it plays a condensing role, reducing the temperature of the oil fume and enhancing the subsequent electrostatic purification effect. The oil fume cools down and returns to a liquid state, then is washed down with the water flow, achieving the purification effect. Ultimately, it achieves both cooling and purification efficiency. The intelligent control achieved through the control module ensures that the water level in the tank remains consistently above the preset first water level, meeting the water purification needs and preventing water loss due to ventilation, thus maintaining the purification effect.

[0017] The wet fume hood purification device provided by this invention, when a fire occurs, the flames are drawn into the wet fume hood purification device, the flames first enter the baffle plate, the baffle plate will block most of the flames, a small part of the flames are sprayed onto the cover plate, which will extinguish some of the flames again, and finally the remaining flames enter the water curtain with the airflow, and the flames are completely extinguished.

[0018] The wet fume hood purification device provided by the present invention divides the internal cavity of the device into three parts: a first cavity, a second cavity, and a third cavity. The air inlet grille divides the first cavity and the second cavity. When the oil fumes or water vapor increase instantaneously, the fumes gathered in the first cavity can be quickly drawn into the fume hood through the air inlet grille, thereby meeting the purification requirements.

[0019] The wet fume hood purification device provided by this invention can return oil and water in the overflowing flue gas to the water tank by setting guide grooves on three sides of the baffle plate (flowing to the water tank through the side of the baffle plate without guide grooves), reducing manual cleaning work and facilitating maintenance. In addition, by setting a water baffle plate with a gooseneck structure guide plate, the flue gas can be rotated and pass through, which can intercept most of the moisture in the flue gas, achieve a water blocking effect, and increase purification efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the wet fume hood purification device provided in an embodiment of the present invention; Figure 2 This is an exploded view of the electrostatic component provided in an embodiment of the present invention; Figure 3 This is an exploded view of the structure of the fume hood assembly provided in an embodiment of the present invention; Figure 4This is a side view schematic diagram of the smoke hood assembly provided in an embodiment of the present invention; Figure 5 This is a front view schematic diagram of the water-proof plate provided in an embodiment of the present invention; Figure 6 yes Figure 5 Sectional view of section AA; Figure 7 This is a schematic diagram illustrating the working principle of the water-blocking plate provided in an embodiment of the present invention; Figure 8 This is a connection diagram of the water spray system provided in an embodiment of the present invention; Figure 9 This is a connection diagram of the control module provided in an embodiment of the present invention.

[0021] In the diagram: 1. Electrostatic component; 2. Fume hood component; 3. Outer shell; 4. Barrier plate; 5. Air inlet grille; 6. Air outlet grille; 7. Make-up air grille; 8. Cover plate; 9. Mesh plate; 10. Water inlet; 11. Water inlet valve; 12. Check valve; 13. Water level valve; 14. Water tank; 15. Drain valve; 16. Drain outlet; 17. Water pump; 18. Pipe connector; 19. Water baffle; 20. First panel; 21. Second panel; 22. Guide plate; 23. Guide groove; 24. Power supply; 25. Electric field; 26. Fan; 27. UV lamp component; 28. Primary filter; 29. ​​Electrical box; 30. Lighting lamp; 31. Control module; 32. Water-blocking filter; 33. Dense coarse filter. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0023] Example 1

[0024] This embodiment provides a wet fume hood purification device, including an electrostatic component 1 and a fume hood component 2. The fume hood component 2 includes a housing 3, a baffle plate 4, an air inlet grille 5, an air outlet grille 6, a makeup air inlet grille 7, a cover plate 8, a mesh plate 9, and a water spray system. The inlet grille 5 and the outlet grille 6 are installed on the outer shell 3, forming a cavity inside the outer shell 3. The make-up air grille 7 and the baffle plate 4 are connected and installed inside the outer shell 3, dividing the cavity between the inlet grille 5 and the outlet grille 6, forming a first cavity between the inlet grille 5 and the baffle plate 4 and a remaining cavity. The cover plate 8 and the mesh plate 9 are connected and installed inside the outer shell 3, dividing the remaining cavity, forming a second cavity between the baffle plate 4 and the mesh plate 9, and a third cavity between the mesh plate 9 and the outlet grille 6. The flue gas enters the first cavity through the inlet grille 5, then enters the second cavity through the baffle plate 4, then enters the third cavity through the mesh plate 9, and finally flows out through the outlet grille 6. The water spraying system includes an inlet 10, an inlet valve 11, a check valve 12, a water level valve 13, a water tank 14, a drain valve 15, and a drain outlet 16 connected in sequence to form a loop. It also includes a control module 31, a water pump 17, and a pipe connector 18. The pipe connector 18 is connected to the water pump 17, which is placed inside the water tank 14. The control module 31 controls the opening and closing of the inlet valve 11, the drain valve 15, and the water level valve 13 according to the water level in the water tank 14, so that the water level in the water tank 14 is not lower than a preset first water level. The water tank 14 is connected to the outer shell 3. The water tank 14 is located below the mesh plate 9. The water pump 17 and the pipe joint 18 are used to spray water onto the mesh plate 9. The electrostatic component 1 is installed outside the air outlet grille 6 to provide driving force to form airflow and drive the flue gas through the wet fume hood purification device.

[0025] This invention features an automatic water-replenishing spray system. The water level valve 13 opens and closes according to the water level in the water tank 14, automatically replenishing water during use. Through the connection of the inlet 10, inlet valve 11, check valve 12, water level valve 13, and water tank 14, a high liquid level is maintained in the water tank 14 at all times. Furthermore, the backflow prevention design of the check valve 12 prevents contamination of the tap water source. The combination of the water tank 14, water pump 17, pipe connector 18, and mesh plate 9 ensures that when the water pump 17 is running, water is evenly sprayed onto the mesh plate 9, forming a flowing water curtain. When oil fumes pass through, this water curtain acts as a condenser, lowering the temperature of the oil fumes and enhancing the subsequent electrostatic purification. The cooled oil fumes return to a liquid state and are washed away by the water flow, achieving a purification effect. Ultimately, this achieves both cooling and purification efficiency. Intelligent control via the control module 31 ensures that the water level in the water tank 14 remains consistently above the preset first water level, meeting the purification water requirements and preventing water loss due to exhaust, thus maintaining the purification effect.

[0026] In the event of a fire, the wet fume hood purification device provided in this embodiment draws the flames into the wet fume hood purification device. The flames first enter the baffle plate 4, which blocks most of the flames. A small portion of the flames are sprayed onto the cover plate 8, which extinguishes some of the flames again. Finally, the remaining flames enter the water curtain with the airflow, and all the flames are extinguished.

[0027] The wet fume hood purification device provided in this embodiment divides the internal cavity of the device into three parts: a first cavity, a second cavity, and a third cavity. The air inlet grille 7 divides the first cavity and the second cavity. When the oil fumes or water vapor increase instantaneously, the fumes gathered in the first cavity can be quickly drawn into the fume hood through the air inlet grille 7, thereby meeting the purification requirements.

[0028] Example 2

[0029] This embodiment provides a wet fume hood purification device, such as... Figure 1As shown, it includes an electrostatic component 1 and a fume hood component 2. The fume hood component 2 includes a housing 3, a baffle plate 4, an air inlet grille 5, an air outlet grille 6, a make-up air grille 7, a cover plate 8, a mesh plate 9, and a water spray system.

[0030] like Figure 3 and Figure 4 As shown, the air inlet grille 5 and the air outlet grille 6 are installed on the outer shell 3, forming a cavity inside the outer shell 3. One side of the make-up air grille 7 is connected to one side of the baffle plate 4 and is installed inside the outer shell 3, dividing the cavity between the air inlet grille 5 and the air outlet grille 6, forming a first cavity and a remaining cavity between the air inlet grille 5 and the baffle plate 4. The cover plate 8 and the mesh plate 9 are connected and installed inside the outer shell 3, dividing the remaining cavity, forming a second cavity between the baffle plate 4 and the cover plate 8, and a third cavity between the mesh plate 9 and the air outlet grille 6. Under normal circumstances, the flue gas enters the first cavity through the air inlet grille 5, then enters the second cavity through the baffle plate 4, then enters the third cavity through the mesh plate 9, and finally flows out through the air outlet grille 6. When the oil fumes or water vapor increase suddenly, the flue gas gathered in the first cavity can be quickly drawn into the fume hood through the make-up air grille 7, thereby meeting the purification requirements.

[0031] like Figure 3 As shown, a water-blocking filter 32 and a dense coarse filter 33 are also provided on the mesh plate 9 to ensure that no flames enter the oil fume electric field, thus making the equipment fireproof.

[0032] like Figure 8 As shown, the water spraying system includes an inlet 10, an inlet valve 11, a check valve 12, a water level valve 13, a water tank 14, a drain valve 15, and a drain outlet 16 connected in sequence to form a loop. It also includes a control module 31, a water pump 17, and a pipe connector 18. The pipe connector 18 is connected to the water pump 17, which is placed inside the water tank 14. The water level valve 13 opens and closes according to the water level in the water tank 14.

[0033] The water tank 14 is connected to the outer casing 3 and is located below the mesh plate 9. The water pump 17 and pipe connector 18 are used to spray water onto the mesh plate 9 to form a water curtain, which can act as a fire barrier to prevent fires. When the flue gas temperature is high, the oil fume purification efficiency of traditional fume hood purification devices will decrease. However, in this embodiment, when the flue gas passes through the water curtain, some of the oil fume will dissolve into the water, improving the purification efficiency and reducing the temperature of the flue gas, further improving the purification efficiency of the equipment.

[0034] The inlet 10, inlet valve 11, check valve 12, water level valve 13, water tank 14, drain valve 15, and drain outlet 16 form the first loop, ensuring that the water level in the water tank 14 is always high, preventing water loss due to ventilation and thus maintaining the purification effect, meeting the water demand for purification. The check valve 12 also prevents water in the water tank 14 from flowing back into the tap water pipes and contaminating the water source. The water tank 14, water pump 17, nozzle 18, and screen 9 form the second loop. When the water pump 17 is running, water is evenly sprayed onto the screen 9 through the nozzle 18, forming a flowing water curtain. When the oil fumes pass through the water curtain, their temperature decreases, enhancing the subsequent electrostatic purification. Furthermore, when the oil fumes cool down and return to a liquid state, they can be flushed back into the water tank 14 with the water flow, achieving the purification effect.

[0035] When the water tank 14 of the wet fume hood purification device is replenished with water, the inlet valve 11 is opened, the drain valve 15 is closed, and the water level valve 13 is opened to supply water until the water level reaches the highest level. Then, the water level valve 13 is closed to stop the water supply.

[0036] When the wet fume hood purification device is running, the inlet valve 11 remains open, the drain valve 15 remains closed, and the water level valve 13 opens and closes according to the water level to maintain the highest water level at all times.

[0037] When the water tank 14 of the wet fume hood purification device drains water, the inlet valve 11 closes and the drain valve 15 opens, and the water tank 14 automatically drains all the water.

[0038] The electrostatic component 1 is installed outside the air outlet grille 6 to provide driving force to form airflow and drive the flue gas through the wet fume hood purification device.

[0039] Example 3

[0040] Based on the same technical concept as Embodiment 2, this embodiment provides a wet fume hood purification device. The difference from Embodiment 2 is that a water-proof plate 19 is also installed between the air outlet grille 6 and the electrostatic component 1. Figure 5 and Figure 6 As shown, the baffle plate 19 includes a first panel 20, a second panel 21, and a guide plate 22. The guide plate 22 is inclinedly disposed between the first panel 20 and the second panel 21, forming a gooseneck structure, as shown. Figure 7 As shown, in this embodiment, the projections of the baffle plate 22 relative to the first panel 20 or the second panel 21 overlap with each other, with an overlap width of 10mm, to prevent air leakage and allow all the oil fume airflow to rotate and pass through the gooseneck structure, thereby trapping moisture in the flue gas and achieving a water-blocking effect.

[0041] The barrier plate 4 has three sides with connected guide grooves 23. The barrier plate 4 is inclined relative to the horizontal plane. The vertical height of the three sides with guide grooves 23 is higher than the side without guide grooves. The side of the barrier plate without guide grooves is located above the water tank 14. The guide grooves 23 are used to collect liquid oil and water hanging on the wall of the equipment frame and return them to the water tank 14, ultimately reducing cleaning and maintenance costs.

[0042] like Figure 2 As shown, the electrostatic assembly 1 includes a power supply 24, an electric field 25, a fan 26, an ultraviolet lamp assembly 27, a primary filter 28, and an electrical box 29.

[0043] like Figure 2 As shown, the primary filter 28 is connected to the front end of the electric field 25 to remove large particles of oil fumes from the flue gas; the power supply 24 is located inside the electrical box 29 to provide high voltage to the electric field 25; the ultraviolet lamp assembly 27 is connected to the rear end of the electric field 25 to purify the odor in the flue gas; and the fan 26 is connected to the rear end of the ultraviolet lamp assembly 27 to provide driving force to form airflow and drive the flue gas through the wet fume hood purification device.

[0044] The ionization voltage of power supply 24 is 12~15kV, and the dust collection voltage of power supply 24 is 6~7.5kV.

[0045] like Figure 9 As shown, it also includes a control module, which is communicatively connected to the inlet valve 11 and the drain valve 15, and is used to control the opening and closing of the inlet valve 11 and the drain valve 15.

[0046] It also includes a status monitoring module and a communication module. The status monitoring module is used to monitor the water level in the tank, and the communication module is used to remotely transmit the monitoring data of the status monitoring module.

[0047] It also includes a lighting lamp 30, which is installed at the front end of the wet fume hood purification device.

[0048] Example 4

[0049] This embodiment provides a control method for the wet fume hood purification device provided in Embodiment 1, including: Before purifying the flue gas, perform the following water replenishment procedure: open the inlet valve and the water level valve, close the drain valve, fill the water tank with water until the water level in the tank is not lower than the preset first water level, and then close the inlet valve and the water level valve. During the flue gas purification process, the following water control procedure is performed: open the inlet valve and the water level valve, close the drain valve, and fill the water tank with water so that the water level in the tank is not lower than the preset first water level. During the flue gas purification process, the following purification procedure is performed: the electrostatic component is turned on, which drives the flue gas from the inlet grille into the first chamber, then through the baffle plate into the second chamber, then through the mesh plate into the third chamber, and finally out through the outlet grille.

[0050] After the flue gas purification is completed, the following drainage process is also performed: close the inlet valve and open the drain valve until all the water in the tank is drained.

[0051] During the flue gas purification process, the following timed water replenishment procedure is also performed: water is added to the water tank at preset time intervals.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to explain the relative positional relationship and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0053] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A wet fume hood purification device, characterized in that, It includes electrostatic components and fume hood components. The fume hood components include a housing, a baffle plate, an air inlet grille, an air outlet grille, a makeup air inlet grille, a cover plate, a mesh plate, and a water spray system. The air inlet grille and air outlet grille are installed on the outer shell, forming a cavity inside the outer shell. The make-up air grille and the baffle plate are connected and installed inside the outer shell, dividing the cavity between the air inlet grille and the air outlet grille, forming a first cavity between the air inlet grille and the baffle plate and a remaining cavity. The cover plate and the mesh plate are connected and installed inside the outer shell, dividing the remaining cavity, forming a second cavity between the baffle plate and the cover plate, and a third cavity between the mesh plate and the air outlet grille. The flue gas enters the first cavity through the air inlet grille, then enters the second cavity through the baffle plate, then enters the third cavity through the mesh plate, and finally flows out through the air outlet grille. The water spraying system includes an inlet, an inlet valve, a check valve, a water level valve, a water tank, a drain valve, and a drain outlet connected in sequence to form a loop. It also includes a control module, a water pump, and a pipe connector. The pipe connector is connected to the water pump, which is placed inside the water tank. The control module controls the opening and closing of the inlet valve, the drain valve, and the water level valve according to the water level in the water tank, so that the water level in the water tank is not lower than the preset first water level. The water tank is connected to the outer shell and is located below the mesh plate. The water pump and pipe joint are used to spray water onto the mesh plate. The electrostatic component is installed outside the air outlet grille to provide driving force to form airflow, which drives the flue gas through the wet fume hood purification device.

2. The wet fume hood purification device according to claim 1, characterized in that, A water-proof plate is also installed between the air outlet grille and the electrostatic component. The water-proof plate includes a first panel, a second panel, and a guide plate. The guide plate is inclined between the first panel and the second panel, and the projections of the guide plate relative to the first panel or the second panel overlap each other with an overlap width greater than or equal to 8mm.

3. The wet fume hood purification device according to claim 1, characterized in that, The barrier plate has three sides with connected guide grooves. The barrier plate is inclined relative to the horizontal plane. The vertical height of the three sides with guide grooves is higher than the side without guide grooves. The side of the barrier plate without guide grooves is located above the water tank. The guide grooves are used to collect oil droplets in the flue gas into the water tank.

4. The wet fume hood purification device according to claim 1, characterized in that, The electrostatic assembly includes a power supply, an electric field, a fan, an ultraviolet lamp assembly, a primary filter, and an electrical box. The primary filter is connected to the front end of the electric field and is used to remove large particles of oil fumes from the flue gas. The power source is located inside the electrical box and is used to provide high voltage to the electric field; The ultraviolet lamp assembly is connected to the back end of the electric field and is used to purify the odor in the flue gas. The fan is connected to the rear end of the ultraviolet lamp assembly and is used to provide driving force to form airflow, which drives the flue gas through the wet fume hood purification device.

5. The wet fume hood purification device according to claim 4, characterized in that, The ionization voltage of the power supply is 12~15kV, and the dust collection voltage of the power supply is 6~7.5kV.

6. The wet fume hood purification device according to claim 1, characterized in that, It also includes a status monitoring module and a communication module. The status monitoring module is used to monitor the water level in the tank, and the communication module is used to remotely transmit the monitoring data of the status monitoring module.

7. A control method for a wet fume hood purification device according to any one of claims 1 to 6, characterized in that, include: Before purifying the flue gas, perform the following water replenishment procedure: open the inlet valve and the water level valve, close the drain valve, fill the water tank with water until the water level in the tank is not lower than the preset first water level, and then close the inlet valve and the water level valve. During the flue gas purification process, the following water control procedure is performed: open the inlet valve and the water level valve, close the drain valve, and fill the water tank with water so that the water level in the tank is not lower than the preset first water level. During the flue gas purification process, the following purification procedure is performed: the electrostatic component is turned on, which drives the flue gas from the inlet grille into the first chamber, then through the baffle plate into the second chamber, then through the mesh plate into the third chamber, and finally out through the outlet grille.

8. The control method according to claim 7, characterized in that, After the flue gas purification is completed, the following drainage process is also performed: close the inlet valve and open the drain valve until all the water in the tank is drained.

9. The control method according to claim 7, characterized in that, During the flue gas purification process, the following timed water replenishment procedure is also performed: water is added to the water tank at preset time intervals.

10. The control method according to claim 7, characterized in that, Also includes: When the water level in the tank is higher than the preset second water level, or the liquid temperature in the tank is higher than the preset temperature, or the oil-water mixture concentration in the tank is higher than the preset concentration, and the wet fume hood purification device is not in working time, open the drain valve to discharge all the oil-water mixture in the wet fume hood purification device, open the inlet valve until the water level in the tank is not lower than the first water level, and then close the inlet valve. The second water level is higher than the first water level.

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