Wet-type film forming structure and wet-type fire-retardant smoke hood all-in-one machine with wet-type film forming structure

Abstract

The invention discloses a wet-type film forming structure and a wet-type fire-retardant smoke hood all-in-one machine with the same. The wet-type film forming structure comprises a pore plate assembly and a water circulation device for conveying water to the pore plate assembly. The pore plate assembly comprises a lower pore plate and an upper pore plate, and lampblack sequentially penetrates through the lower pore plate and the upper pore plate; the water circulation device continuously conveys water to the lower pore plate and forms a water film on the lower pore plate, the thickness of the water film is set to be 8-12 mm, and the flow speed of the oil fume penetrating through the lower pore plate is 8-12 m / s; saturated oil fume gas is in contact with the upper pore plate for cooling and water removal after being in contact with the water film of the lower pore plate for cooling and filtering, the lower pore plate and the upper pore plate are arranged, so that the oil fume purification effect is better, and meanwhile, the water circulation device is arranged to convey water to the lower pore plate and form the water film, so that the oil fume can be in contact with water all the time, and the oil fume is cleaned and cooled.

Description

Technical Field

[0001] The invention belongs to the field of oil fume purification integrated machine, and relates to a wet film-forming structure and a wet fire-retardant fume hood integrated machine having the same. Background Art

[0002] The all-in-one hood is a kitchen appliance that combines a hood with oil fume purification. It is installed above the kitchen stove and can quickly extract the waste from stove combustion and the oil fume, odor, particulate matter, etc. that are harmful to the human body generated during the cooking process, and discharge them outdoors after multi-stage purification treatment.

[0003] When the range hood is used continuously for too long, the hot oil smoke will make the surface temperature of the exhaust duct become too high. At this time, if the exhaust duct comes into contact with flammable materials and the surface temperature of the exhaust duct reaches the ignition point of the flammable materials, the flammable materials will be ignited or catch fire during the cooking process. The fire will enter the range hood with the oil smoke, causing damage to the range hood, causing a fire, and threatening the safety of life and property. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a wet film-forming structure, including a perforated plate assembly and a water circulation device that supplies water to the perforated plate assembly, the perforated plate assembly includes a lower perforated plate for cooling and filtering oil smoke and an upper perforated plate for removing water from the oil smoke, and the oil smoke passes through the lower perforated plate and the upper perforated plate in sequence; the holes on the upper perforated plate are arranged in a wave-shaped bending shape, and the upper perforated plate is provided with a plurality of corrugated plates, and the bending directions of two adjacent corrugated plates are opposite, the water circulation device continuously supplies water to the lower perforated plate and forms a water film on the lower perforated plate, the thickness of the water film is set to 8-12mm, and the flow rate of the oil smoke passing through the lower perforated plate is 8m / s-12m / s; after being cooled and filtered in contact with the water film of the lower perforated plate, the saturated oil smoke gas contacts the upper perforated plate for cooling and dehydration.

[0005] More specifically, a plurality of ventilation holes are provided on the lower perforated plate, and the occupancy rate of the ventilation holes on the lower perforated plate is 33%.

[0006] More specifically, the diameter of the ventilation hole is set to 3-10 mm.

[0007] More specifically, the diameter of the ventilation hole is set to 4.2 mm.

[0008] More specifically, the thickness of the lower perforated plate is set to 0.5-5 cm.

[0009] More specifically, the thickness of the lower orifice plate is set to 1 cm.

[0010] More specifically, an overflow pipe is led out from the water delivery pipe, a part of the water entering the water delivery pipe is discharged through the overflow pipe, and the other part is transported to the lower orifice plate.

[0011] More specifically, a low liquid level sensor and a high liquid level sensor are arranged in the water storage tank.

[0012] More specifically, a water replenishment port is provided on the shell, and the water replenishment port is connected to the water storage tank.

[0013] More specifically, a water spray hole is opened on the water pipe, and a blocking member is arranged above the water pipe. Water is sprayed from the water spray hole toward the blocking member and drips to the lower orifice plate through the blocking member.

[0014] More specifically, the blocking member includes a first baffle and a second baffle which are connected to each other. The first baffle and the second baffle are both inclined, and water drips from the two baffles to the lower orifice plate.

[0015] A wet fire-retardant smoke hood integrated machine includes a shell, a wet film-forming structure and a purification module for purifying oil smoke, wherein the wet film-forming structure is arranged in the shell, an air inlet and an air outlet are arranged on the shell, a fan is arranged at the air outlet, and an air intake is arranged at the air inlet of the shell.

[0016] More specifically, the purification module includes a wire mesh demister for water removal and filtration, an electric field component for purifying oil smoke, and a UV lamp for removing odors, which are arranged in sequence.

[0017] The present invention provides a wet film-forming structure and a wet fire-retardant smoke hood integrated machine having the same, which can achieve the following technical effects: a lower orifice plate and an upper orifice plate are provided, so that the oil fume can be filtered twice, so that the oil fume purification effect is better, and a water circulation device is provided to transport water to the lower orifice plate to form a water film, and the water film always maintains a water film state. Even after the oil fume passes through the lower orifice plate, the water film still maintains a water film state, and water does not flow downward from the lower orifice plate, so that the oil fume can always be in contact with water, and the oil fume is cleaned and cooled, which effectively improves the purification efficiency of the rear-end oil fume, and at the same time extends the cleaning and maintenance cycle. If there is a fire, it can also be extinguished to ensure the fire extinguishing effect and safety at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 It is a side structural schematic diagram of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the water circulation device of the present invention in cooperation with the upper and lower orifice plates;

[0022] Figure 5 It is a schematic diagram of the structure of the lower orifice plate of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the upper orifice plate of the present invention;

[0024] Figure 7 It is a schematic diagram of the cooperation between the water delivery pipe and the blocking member of the present invention;

[0025] In the figure: 1. Shell; 11. Cyclone plate; 12. Air suction port; 21. Lower orifice plate; 211. Ventilation hole; 22. Upper orifice plate; 31. Water storage tank; 32. Water pipe; 33. Water spray hole; 34. First baffle; 35. Second baffle; 36. Water pump; 37. Overflow pipe; 38. Overflow port; 39. Water replenishment port; 5. Fan; 6. Electric field assembly. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings.

[0028] A wet film-forming structure comprises a perforated plate assembly and a water circulation device for conveying water to the perforated plate assembly;

[0029] A wet fire-retardant smoke hood integrated machine, such as Figure 1 , Figure 2As shown, it includes a housing 1, a wet film-forming structure arranged in the housing 1, a purification module for purifying oil smoke, and a fan 5 for exhausting air. The purification module includes a wire mesh demister for water removal and filtration, an electric field component 6 for purifying oil smoke, and a UV lamp for removing odor. The wire mesh demister is set as an SP wire mesh demister. The electric field component 6 includes a primary high-voltage electric field and a two-stage low-voltage electric field. An air inlet and an air outlet are arranged on the housing 1. The fan 5 is arranged at the air outlet. A cyclone plate 11 is arranged at the air inlet. The oil smoke in the space enters the housing 1 through the cyclone plate 11, is first filtered through the orifice plate component, and then the water and particulate matter on the oil smoke are filtered through the wire mesh demister. Then the electric field component 6 performs three-stage filtration, and then after deodorization by the UV lamp, it is finally discharged from the housing 1 by the fan 5. Multi-stage filtration through the orifice plate component, the electric field component 6, etc. makes the oil smoke purification better.

[0030] like Figure 1 , Figure 2 as well as Figure 3 As shown, in order to ensure the collection of oil smoke, an air suction port 12 is provided at the front end of the shell. Furthermore, the air suction port 12 is provided around the air inlet. The provision of the air suction port 12 facilitates the collection of oil smoke and further absorbs the oil smoke escaping upward.

[0031] like Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, the orifice plate assembly includes a lower orifice plate 21 for cooling and filtering the oil smoke and an upper orifice plate 22 for removing water from the oil smoke. The oil smoke passes through the lower orifice plate 21 and the upper orifice plate 22 in sequence. A space is left between the upper orifice plate 22 and the lower orifice plate 21 to facilitate the installation of a water circulation device.

[0032] The lower perforated plate 21 includes a lower plate and a plurality of ventilation holes 211 opened on the lower plate. The size of the ventilation holes 211 can be set to be consistent or different. In this solution, the ventilation holes 211 are set to be the same size. The plurality of ventilation holes 211 are evenly arranged on the lower plate, and the pore ratio of the ventilation holes 211 on the lower plate is 33%. The diameter of each ventilation hole 211 is set to 3-10mm. The smaller the diameter of the ventilation hole 211 is set, the easier it is to be blocked by oil smoke, and the higher the frequency of cleaning will be, but it will be easier to clean. The larger the diameter of the ventilation hole 211 is set, the less likely it is to be blocked, and the fewer times of cleaning will be, but it will be more inconvenient to clean. Therefore, in this solution, the diameter of the ventilation hole 211 is set to 4.2mm, which can reduce the frequency of cleaning and ensure convenient cleaning.

[0033] If the pressure inside the shell 1 is too high, it will affect the air volume of the fan 5. To ensure the air volume, it is necessary to replace the fan 5 with a higher power, which increases the cost. In this solution, the pressure used for the lower orifice plate 21 needs to be controlled at 100 Pa, because the thickness of the lower orifice plate 21 will affect the pressure inside the shell 1. The thicker the lower orifice plate 21, the greater the pressure. In order to ensure the pressure inside the shell 1 while ensuring the performance, the thickness of the lower orifice plate 21 is set to 0.5-5 cm. In this solution, the thickness of the lower orifice plate 21 is set to 1 cm.

[0034] like Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, the water circulation device continuously delivers water to the lower orifice plate 21 and forms a water film on the lower orifice plate 21. The water film continuously maintains the film state. After the oil smoke passes through the lower orifice plate 21, the water film still maintains the water film state. The water delivered by the water circulation device to the lower orifice plate 21 will not drip from the ventilation hole 211 due to the passage of the oil smoke. In order to ensure that the water film always maintains the film state, the wind speed of the oil smoke passing through the ventilation hole 211 needs to be controlled at 8m / s-12m / s, and the thickness of the water film is maintained at 8-12mm. More specifically, the thickness of the water film is maintained at 10mm, and the wind speed of the oil smoke passing through the ventilation hole 211 needs to be controlled at 12m / s. The oil smoke entering from the air inlet passes through the lower orifice plate 21 and contacts with the water film on the lower orifice plate 21, intercepting the oil stains and part of the particulate matter on the oil smoke. At the same time, the ventilation holes 211 opened on the lower plate will also intercept the large particulate matter carried by the oil smoke. When the oil smoke passes through the lower perforated plate 21, a water film is formed on the lower perforated plate 21, and the temperature of the lower perforated plate 21 is significantly lower than that of the oil smoke, so heat exchange is performed with the oil smoke to reduce the temperature of the oil smoke. If a fire occurs in the space, the fire enters the housing 1 along with the oil smoke. Due to the existence of the water film, the fire on the oil smoke will be extinguished, preventing the open flame from entering the hood integrated machine, causing damage to the hood integrated machine, or even causing a fire.

[0035] According to the calculation formula of liquid pressure P = ρgh, where P is pressure, ρ is the density of the liquid, g is the acceleration of gravity, and h is the height of the liquid. For water, its density ρ is about 1000kg / m 3 , the acceleration due to gravity g is about 9.8m / s 2 Therefore, when the pressure is 100 Pa, the corresponding water film height can be calculated by the formula to be approximately 10 mm.

[0036] On a plate of the same area, the same number of ventilation holes 211 are opened. The larger the hole diameter, the greater the hole occupancy rate. When the same fan is used, the smaller the wind speed in the hole, the smaller the static pressure difference, and according to the liquid pressure formula, the smaller the water film thickness. The following data are obtained based on the experiment:

[0037] Ventilation hole diameter (mm) Porosity Wind speed in ventilation hole Static pressure difference Water film thickness φ3.2 25％ 14.2m / s 130pa 14mm φ4.2 33％ 12m / s 100pa 10mm φ5.2 50.5％ 7.4m / s 35pa 4mm φ6.2 67.6％ 5.5m / s 20pa 3mm

[0038] It can be seen from the data in the table that when the diameter of the ventilation hole 211 is set to 5.2mm, the water film thickness is only 4mm, and when the diameter of the ventilation hole 211 is set to 6.2mm, the water film thickness is only 3mm. During the preparation of the sheet metal, due to process reasons, it is impossible to ensure that the surface of the sheet metal is absolutely smooth. When the water film thickness is only 4mm or even 3mm, there may be some places on the sheet metal where a water film cannot be formed, resulting in the inability to filter and clean the oil smoke. Therefore, the ventilation hole 211 needs to select a diameter of 4.2mm or 3.2mm. However, the smaller the aperture, the greater the static pressure difference, the higher the requirements for the fan 5 will be, and the higher the cost will be. In order to meet the needs of most manufacturers, a 4.2mm aperture is selected in this solution.

[0039] In the process of filtering the oil fume, the oil on the oil fume will mix with the water film, and as time goes by, it will stick to the lower perforated plate 21, which is difficult to clean. Therefore, it is necessary to drain the water on the lower perforated plate 21 in real time. One side of the lower perforated plate 21 is set as the drainage side, and the water on the lower perforated plate 21 is discharged from the drainage side to the water circulation device.

[0040] like Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7As shown, the water circulation device includes a water tank 31, a water pump 36 disposed in the water tank 31, and a water delivery pipe 32 connected to the water pump 36. The water in the water tank 31 is delivered to the water delivery pipe 32 by the water pump 36, and then flows back to the water tank 31 through the lower perforated plate 21, and the water is delivered to the lower perforated plate 21 in a reciprocating cycle. However, during the reciprocating cycle, the water film will clean and filter the oil smoke, so that the amount of oil in the water in the water tank 31 gradually increases, sticks to the machine, and affects the subsequent cleaning, so an overflow pipe 37 is provided. One end of the overflow pipe 37 is connected to the water pipe 32, and the other end is connected to the overflow port 38. The overflow port 38 is connected to the external drainage bucket to uniformly treat the water containing oil pollution. When the water in the water storage tank flows in the water pipe 32, part of the water will flow to the overflow pipe 37, and finally flow to the overflow port 38 to be discharged from the water storage tank 31. In the process of drainage, the oil pollution will be discharged at the same time, so that the amount of oil pollution in the water storage tank 31 can be reduced, but at the same time, the amount of water in the water storage tank 31 will also be reduced, affecting the formation of the water film, so the water replenishment port 39 is set. The water replenishment port 39 is connected to the external water source, and the water storage tank 31 is replenished with water through the water replenishment port 39 to prevent the water amount in the water storage tank 31 from being too small, which affects the formation of the water film. In order to better control the amount of water in the water tank 31, a low liquid level sensor and a high liquid level sensor are set in the water tank 31. When the low liquid level sensor cannot detect water, the water replenishment port 39 starts to take in water. When the high liquid level sensor detects water, the water replenishment port 39 stops taking in water. The positions of the low liquid level sensor and the high liquid level sensor are set according to the required water amount.

[0041] After the hood integrated machine is turned on, the water circulation device, the water pump arranged in the water storage tank 31 is turned on to transport water to the water pipe 32, and the water pipe 32 sprays water to the lower orifice plate 21 to form a water film on the lower orifice plate 21. More specifically, a water spray hole 33 is opened on the water pipe 32, and the water in the water pipe 32 is sprayed onto the lower orifice plate 21 through the water spray hole 33. The water spray hole 33 can be directly set toward the lower orifice plate 21 to directly spray water onto the lower orifice plate 21, and can also be set to be opened toward other directions. A blocking member is provided in the water spraying direction so that water flows from the blocking member to the lower orifice plate 21. The water spray hole 33 is directly opened toward the lower orifice plate 21, so that one component can be reduced. However, if water is directly sprayed onto the lower orifice plate 21, a water film cannot be formed on the lower orifice plate 21 due to the impact of water. Therefore, in the present solution, the water spray hole 33 is provided toward the upper orifice plate 22, and a blocking member is provided in the water flow direction. Water is sprayed from the water spray hole 33 toward the blocking member and drips onto the lower orifice plate 21 through the blocking member, and water forms a water film on the lower orifice plate 21.

[0042] like Figure 3 , Figure 4 as well as Figure 7As shown, the blocking member can be set to any component that can block water and allow water to flow to the lower orifice plate 21. In this solution, the blocking member includes a first baffle 34 and a second baffle 35 that are connected and arranged. The first baffle 34 and the second baffle 35 are both inclined. Water is sprayed from the water spray hole 33 to the first baffle 34 and the second baffle 35, and then the water drips from the two baffles to the lower orifice plate 21 to form a water film on the lower orifice plate 21. The angle between the first baffle 34 and the second baffle 35 is set to be greater than or equal to 30° and less than or equal to 120°, preferably set to 90°. The setting of the first baffle 34 and the second baffle 35 needs to ensure that the water sprayed from the water spray hole 33 will not flow to the upper orifice plate 22, and the water will flow to the lower orifice plate 21.

[0043] The water pipe 32 is arranged above the lower perforated plate 21 and arranged along the length direction of the lower perforated plate 21, covering the length direction of the lower perforated plate 21. The water pipe 32 can be arranged on the side away from the air inlet, or can be arranged in the middle position of the width direction of the lower perforated plate 21, as long as it is ensured that the water can cover the entire lower perforated plate 21 and form a water film on the lower perforated plate 21. The drainage trough is arranged along the length direction of the lower perforated plate 21. When the water continuously flows to the lower perforated plate 21 and forms a water film on the lower perforated plate 21, the water also continuously flows to the water storage tank 31, and the water that has been cleaned by the oil fume is discharged through the overflow pipe 37. The drainage bucket is connected to the overflow port 38, and the sewage on the water storage tank 31 is directly discharged to the drainage bucket, and the drainage treatment is unified. The water spray holes 33 are evenly opened on the water pipe 32 to ensure that the water sprayed from the water spray holes 33 can cover the entire lower perforated plate 21.

[0044] The water delivery speed of the water delivery pipe 32 to the downward orifice plate 21 needs to ensure that one third of the water in the water storage tank 31 is discharged within one hour to prevent oil stains from sticking and facilitate cleaning and maintenance.

[0045] like Figure 3 , Figure 4 as well as Figure 6As shown, the oil smoke after filtering and cooling at the lower perforated plate 21 flows to the upper perforated plate 22. The oil smoke flowing out of the upper perforated plate 22 will pass through the SP wire mesh filter and then be discharged to the electric field component 6. However, the electric field component 6 will affect the purification efficiency after water enters, and the oil smoke at the lower perforated plate 21 may be stained with water, so the oil smoke needs to be dehydrated at the upper perforated plate 22. Although the SP wire mesh filter is set to remove the water on the oil smoke, in order to prevent the first-level dehydration from being unable to remove the water completely, an upper perforated plate 22 is added. The upper perforated plate 22 is provided with several layers from top to bottom, and each layer is provided with a continuous corrugated plate. The bending direction of each corrugated plate is consistent, but the corrugated plates of each adjacent layer are arranged The directions are different. Furthermore, the bending directions of two adjacent corrugated plates are opposite. The holes formed on the upper perforated plate 22 are corrugated and curved. The multi-channel setting has a better effect of filtering oil smoke and water vapor, a more even flow, and a reduced cleaning frequency. The plate is resistant to high temperatures and has a longer service life. The plate can be cleaned and used repeatedly, and has low wind resistance and good fire prevention effect. Setting the bending directions of two adjacent corrugated plates to be opposite can increase airflow turbulence, and the paths of the corrugated plates in different directions are more complicated, which prolongs the residence time of oil smoke, improves purification efficiency, disperses oil smoke particles, avoids local accumulation, reduces the risk of blockage, and prolongs equipment life. At the same time, the plate can better cope with changes in different oil smoke concentrations and airflow velocities and maintain a stable purification effect.

[0046] The fume purification process of the fume hood integrated machine is as follows:

[0047] The hood integrated machine is started, and the water pump is turned on, so that the water in the water storage tank 31 flows to the water pipe 32, and flows to the first baffle 34 and the second baffle 35 through the water spray hole 33, and flows to the lower perforated plate 21 through the first baffle 34 and the second baffle 35 until a water film is formed on the lower perforated plate 21, and the oil smoke in the space enters the shell 1 through the cyclone plate 11, and the oil smoke escaping upward is adsorbed again by the air suction port 12, first passes through the lower perforated plate 21, and the large particles on the oil smoke are filtered through the ventilation hole 211, and then the oil stains are filtered through the water film and the oil smoke is cooled. If there is a flame on the oil smoke, the water film can also extinguish the flame to prevent fire. Then the oil smoke flows to the upper perforated plate 22, which filters the water vapor carried by the oil smoke, and then filters the oil smoke particles again before flowing to the SP wire mesh filter, which filters the water and particles on the oil smoke, and then the electric field component 6 performs three-stage filtration, and then after deodorization by UV lamp, it is discharged from the housing 1 through the fan 5 after purification. During the process of the overflow pipe 37 draining water to the outside, if the low liquid level sensor cannot detect water, the water replenishment port replenishes water to the water storage tank 31 until the high liquid level sensor detects water, and then stops water intake to ensure that the water flows in real time, and the water film cannot carry too much oil smoke to affect cleaning.

[0048] The present invention provides a wet film-forming structure and a wet fire-retardant smoke hood integrated machine having the same, which can achieve the following technical effects: a lower perforated plate 21 and an upper perforated plate 22 are provided, so that the oil smoke can be filtered twice, so that the oil smoke purification effect is better, and a water circulation device is provided to transport water to the lower perforated plate 21 to form a water film, and the water film always maintains a water film state. Even after the oil smoke passes through the lower perforated plate 21, the water film still maintains a water film state, and water does not flow downward from the lower perforated plate 21, so that the oil smoke can always be in contact with water to clean the oil smoke. If there is a flame on the oil smoke, the fire can also be extinguished, thereby ensuring the fire extinguishing effect and ensuring safety at the same time.

[0049] The water circulation device continuously supplies water to the lower orifice plate 21, the water supply port 39 supplies water to the water storage tank 31, and the overflow pipe 37 discharges water to the outside of the shell 1, ensuring that the water on the lower orifice plate 21 flows in real time and will not stick to the lower orifice plate 21 due to excessive contact with oil smoke, making it difficult to clean.

[0050] A blocking member is provided to receive water flowing out of the water spray hole 33 so that the water can flow slowly toward the lower orifice plate 21 , thereby ensuring that a water film can be formed on the lower orifice plate 21 .

[0051] The upper perforated plate 22 is arranged with multiple channels, which has a better effect of filtering oil smoke and water vapor, can be more evenly distributed, can reduce the frequency of cleaning, is resistant to high temperatures, has a longer service life, can be cleaned and used repeatedly, and has low wind resistance and good fire prevention effect.

[0052] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0054] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A wet film-forming structure, characterized in that: The invention comprises a perforated plate assembly and a water circulation device for conveying water to the perforated plate assembly, wherein the perforated plate assembly comprises a lower perforated plate (21) for cooling and filtering oil smoke and an upper perforated plate (22) for removing water from the oil smoke, and the oil smoke passes through the lower perforated plate (21) and the upper perforated plate (22) in sequence; the holes on the upper perforated plate (22) are arranged in a wave-shaped bending manner, and the upper perforated plate (22) is provided with a plurality of wave-shaped plates, and the bending directions of two adjacent wave-shaped plates are opposite; the water circulation device continuously conveys water to the lower perforated plate (21) and forms a water film on the lower perforated plate (21), and the thickness of the water film is set to 8-12 mm, and the flow rate of the oil smoke passing through the lower perforated plate (21) is 8 m / s-12 m / s; after contacting with the water film of the lower perforated plate (21) for cooling and filtering, the saturated oil smoke gas contacts with the upper perforated plate (22) for cooling and removing water.

2. The wet film forming structure according to claim 1, characterized in that: The lower perforated plate (21) comprises a lower plate and a plurality of ventilation holes (211) provided on the lower plate, and the pore ratio of the ventilation holes (211) on the lower plate is 33%.

3. The wet film forming structure according to claim 2, characterized in that: The diameter of the ventilation hole (211) is set to 3-10 mm.

4. The wet film forming structure according to claim 3, characterized in that: The diameter of the ventilation hole (211) is set to 4.2 mm.

5. The wet film forming structure according to claim 1, characterized in that: The water circulation device comprises a water storage tank (31), a water pump (36) arranged in the water storage tank (31), and a water delivery pipe (32) connected to the water pump (36), wherein the water delivery pipe (32) delivers water to the lower perforated plate (21).

6. The wet film forming structure according to claim 5, characterized in that: An overflow pipe (37) is led out from the water delivery pipe (32), and a portion of the water entering the water delivery pipe (32) is discharged through the overflow pipe (37), while the other portion is transported to the lower perforated plate (21).

7. The wet film forming structure according to claim 5, characterized in that: A low liquid level sensor and a high liquid level sensor are arranged in the water storage tank (31).

8. The wet film forming structure according to claim 5, characterized in that: The water circulation device also includes a water replenishment port (39), and the water replenishment port (39) is connected to the water storage tank (31).

9. The wet film forming structure according to claim 5, characterized in that: The water delivery pipe (32) is provided with a water spray hole (33), and a blocking member is provided in the flow direction of water sprayed from the water spray hole (33). Water is sprayed from the water spray hole (33) toward the blocking member and drips toward the lower perforated plate (21) through the blocking member.

10. The wet film forming structure according to claim 9, characterized in that: The blocking member comprises a first baffle (34) and a second baffle (35) which are connected to each other, and the first baffle (34) and the second baffle (35) are both inclined.

11. A wet fire-retardant smoke hood integrated machine, characterized in that: It comprises a shell (1), a wet film-forming structure as described in any one of claims 1 to 10, and a purification module for purifying oil smoke, wherein the wet film-forming structure is arranged in the shell (1), an air inlet and an air outlet are arranged on the shell (1), a fan (5) is arranged at the air outlet, and an air intake (12) is arranged at the air inlet of the shell (1).

12. The wet fire-retardant fume hood integrated machine according to claim 11, characterized in that: The purification module comprises a wire mesh demister for water removal and filtration, an electric field component (6) for purifying oil smoke, and a UV lamp for removing odors, which are arranged in sequence.

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