A kitchen fume heat recycler

Abstract

The application relates to a kitchen oil fume heat recycler, belonging to the field of environmental protection equipment, which comprises a filter box body; a flue gas uniform distribution unit and multiple groups of filter screen units are sequentially arranged in the filter box body along the flue gas flow direction; a water supply source, a main pipe and multiple branch pipes are arranged on the filter box body; the two ends of the main pipe are connected with the water supply source and the multiple branch pipes respectively; the multiple branch pipes are located directly above the multiple groups of filter screen units respectively; multiple water outlets are arranged on the branch pipes along the width direction of the filter screen units; the filter screen unit comprises a mounting frame and multiple groups of filter screens located on the inner side of the mounting frame; the multiple groups of filter screens are sequentially connected in the vertical direction and in a stepped mode; the top wall of each group of filter screens is provided with a water storage groove; a water supplementing unit is arranged in the water storage groove; and the application has the technical effects of high filtering effect and long service life.

Description

Technical Field

[0001] This application relates to the technical field of environmental protection equipment, and in particular to a kitchen oil fume heat recovery device. Background Technology

[0002] The high-temperature fumes produced by cooking in the kitchen contain a large amount of grease, particulate matter, and recyclable heat. Direct emission of these fumes not only pollutes the environment but also wastes energy.

[0003] Similar fume removal technologies currently on the market include water fume hoods. This technology and its operating mechanism involve a water pump pressurizing water in a tank, which is then sprayed out through nozzles to form a fan-shaped mist. The nozzle design allows for a wide water mist coverage area, and some larger water droplets are further atomized after being deflected by a reflector, forming a dense water mist layer. Kitchen fumes flow upwards under the action of the exhaust fan, mixing thoroughly with the water mist. The degreasing agents in the water mist undergo a saponification reaction with the fumes, decomposing and adsorbing the grease in the fumes, causing oil droplets to combine with water to form an oil-water mixture, thus purifying the fumes. Meanwhile, the water mist cools the oily fumes, causing some of the oil mist to condense into particles that fall with the water droplets. The drawback of this equipment is that the smaller the water atomized droplets, the easier they are to be expelled by the negative pressure of the exhaust fan, thus failing to effectively form a dense water mist that comes into contact with the oil fumes and undergoes a saponification reaction. When the droplets in the water mist are large, they cannot form a limited and comprehensive coverage, resulting in oil escaping and insufficient oil removal. This reduces the efficiency of removing oil fumes, pollutes the air environment, and easily causes oil sludge to condense in the pipes, making it difficult to clean and potentially causing a fire, posing a long-term safety hazard.

[0004] Regarding the aforementioned technologies, the inventors believe that they suffer from drawbacks such as poor filtration efficiency and high safety risks associated with mist-like water curtains. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a kitchen oil fume heat recovery device.

[0006] This application provides a kitchen fume heat recovery device, which adopts the following technical solution: A kitchen fume heat recovery device includes a filter box; within the filter box, a flue gas distribution unit and multiple filter screen units are sequentially arranged along the flue gas flow direction; the filter box is provided with a water supply source, a main pipe, and multiple branch pipes; both ends of the main pipe are connected to the water supply source and the multiple branch pipes respectively; the multiple branch pipes are located directly above the multiple filter screen units; multiple water outlet holes are opened on the branch pipes along the width direction of the filter screen units; each filter screen unit includes a mounting frame and multiple filter screen groups located inside the mounting frame; the multiple filter screen groups are connected sequentially in a vertical and stepped manner; the top wall of each filter screen group has a water storage tank; a water replenishment unit is provided in the water storage tank.

[0007] By adopting the above technical solution, a flue gas distribution unit and multiple filter screen units are sequentially arranged inside the filter box. With the help of branch pipe spraying to form a uniform water film on the filter screen surface, kitchen fumes can be classified and purified efficiently. Multiple filter screens are arranged vertically in a stepped manner, with a water storage tank at the top of each filter screen group. The water storage tank can temporarily store water to ensure a stable overflow. Combined with the stepped layering, it ensures the stable formation of the water film on each layer of filter screen group and avoids water film breakage due to water supply fluctuations, ensuring a stable and reliable filtration effect. The water replenishment unit can replenish the water evaporated in the water storage tank in a timely manner to ensure the stable formation of the water film.

[0008] Preferably, the filter assembly includes a connecting seat and a filter screen; the connecting seat is disposed on the mounting bracket; the top end of the filter screen is connected to the connecting seat; the lower end of the filter screen is connected to the connecting seat of the next filter assembly; and the water storage tank is formed on the connecting seat.

[0009] By adopting the above technical solution, the washing water can be smoothly replenished to the filter screen from top to bottom, continuously forming a uniform and stable water film; the stepped filter screen, together with the layered water storage tank, filters oil fumes in multiple stages, purifying and removing oil step by step, greatly improving the oil fume purification accuracy.

[0010] Preferably, a drain port is provided on the side of the connecting seat near the flue gas distribution unit; a filter element is rotatably installed at the drain port; the filter element is located above the water storage tank; a filter groove is provided on the filter element; and a drain port is provided on the bottom wall of the filter groove.

[0011] By adopting the above technical solution, and by adding a drain outlet and a rotatable filter element to the connecting seat, the washing water flows into the water storage tank in an orderly manner through the filter tank and drain outlet. The oil and water are separated by sedimentation in the filter tank. The oil can be discharged in a concentrated manner along the drain outlet, avoiding the backflow of oil and the adhesion of oil to the filter screen, which can cause blockage. The layered filtration and drainage structure can not only ensure a stable water supply and film formation in the water storage tank, but also quickly separate oil fume impurities, reduce the accumulation of dirt on the filter screen, extend the service life of the filter screen, and improve the overall efficiency of oil fume purification and automatic oil discharge.

[0012] Preferably, a floating plate is slidably disposed vertically inside the filter tank.

[0013] By adopting the above technical solution, the floating plate adapts to the rise and fall of the floating plate according to the water level in the tank, automatically floats up to collect and separate oil, and efficiently achieves automatic oil-water separation. Oil collection can be completed without additional power, and the oil can be smoothly discharged from the drain outlet, effectively preventing oil from mixing into the washing water and flowing back to contaminate the filter screen, and continuously ensuring the cleanliness of the water film and the stable filtration effect of the filter screen.

[0014] Preferably, a baffle is provided in the filter tank; the baffle has a vertically arranged partition and a horizontally inclined guide; the guide is located above the drain outlet.

[0015] By adopting the above technical solution, the baffle separates the water inlet and sedimentation area through the partition, realizing the separation of oil and water and preventing oil and clean water from mixing and flowing back; the inclined guide part reasonably guides the flow of washing water, orderly distributes water volume, and ensures stable water replenishment of the water storage tank; at the same time, it blocks the top of the drain outlet to prevent smoke from entering and water from splashing and overflowing, optimizes the water flow direction, improves the purity of oil-water separation, allows oil to concentrate and settle, makes oil discharge smoother, and makes the water film purification effect more lasting and stable.

[0016] Preferably, a smoke baffle is provided at one end of the sewage outlet near the flue gas distribution unit.

[0017] By adopting the above technical solution, the smoke baffle can effectively prevent the oil fume from directly entering the drain outlet and the water storage tank, avoiding the smoke from interfering with oil-water separation and damaging the stability of the water film, thus ensuring the long-term stable and efficient operation of the entire filtration system.

[0018] Preferably, the water replenishment unit includes a water replenishment pipe and two connecting pipes; the two connecting pipes are respectively disposed on both sides of the mounting bracket; the two connecting pipes are respectively connected to the main pipe; a groove is formed on the inner wall of the water storage tank along its length; the side wall of the water replenishment pipe fits against the side wall of the groove; both ends of the water replenishment pipe pass through the connecting seat and are rotatably connected to the two connecting pipes respectively, and are respectively connected to the two connecting pipes; a water replenishment port is formed on the water replenishment pipe; after the water replenishment pipe is rotated, the water replenishment port is located at or protrudes from the groove.

[0019] By adopting the above technical solution, the water inlet is sealed and blocked by the groove structure of the water storage tank under normal conditions, which prevents overflow and leakage. When the water level changes, the water supply can be switched by rotating the water supply pipe. The bidirectional connection pipe ensures uniform water supply on both sides, and the water supply to the water storage tank is balanced and stable.

[0020] Preferably, the bottom wall of the water storage tank has multiple sliding holes vertically formed; a sliding rod is slidably arranged vertically in each of the multiple sliding holes; a rack is provided at the top of the sliding rod; multiple sets of residual gears are provided on the water supply pipe; the multiple racks mesh with the multiple sets of residual gears; an arc-shaped component is provided on the rack; multiple drive rods are provided at the bottom of the floating plate; an arc groove is provided at the bottom end of each of the multiple drive rods to cooperate with the arc-shaped component; the arc-shaped component is slidably arranged in the arc groove.

[0021] By adopting the above technical solution, after the floating plate rises and falls with the water level, it drives the drive rod, the arc component, and the rack to move vertically. Through the meshing transmission between the rack and the residual gear, it automatically drives the water supply pipe to rotate and open and close the water supply port. The slide rod is vertically limited along the sliding hole to ensure that the rack moves smoothly and accurately. During the water supply process, the sprayed water can drive the filter element to rotate, dumping the oil on the top of the filter tank to the drain port, improving the oil separation efficiency. When the filter element rotates, it can slide along the arc component. When the water level in the filter tank rises and causes the floating plate to move upward, the slide rod can drive the rack to move upward by pulling the arc component, thereby driving the water supply pipe to rotate. This ensures that the water supply pipe rotates smoothly according to the water level changes in the water storage tank and the filter tank, and stably replenishes water in the water storage tank.

[0022] Preferably, the flue gas distribution unit includes a water distribution pipe and a guide fan and a distribution net arranged sequentially along the flue gas flow direction; the guide fan is rotatably disposed inside the filter box; the water distribution pipe surrounds the guide fan; and the distribution net is disposed inside the filter box.

[0023] By adopting the above technical solution, the rotation of the guide fan is driven by the self-flowing power of the oil fumes, requiring no additional power. This method is energy-saving and structurally simple, effectively agitating and dispersing the oil fumes entering the chamber, achieving initial uniform distribution of the flue gas and preventing excessively high local concentrations from affecting subsequent filtration. Water distribution pipes are arranged around the guide fan, continuously spraying water onto the fan blades. Under the centrifugal force of the guide fan, the water mist is evenly distributed onto the uniformly distributed net, forming a uniform water film on the net surface for preliminary washing and pre-filtration of the oil fumes. The guide fan and uniformly distributed net are sequentially arranged along the airflow direction, forming a progressive pretreatment structure of first uniform flow, then spraying, and finally coarse filtration. This provides a uniform and stable airflow for the subsequent deep purification of the filter unit, improving the overall oil fume purification efficiency.

[0024] Preferably, the flue gas uniform distribution unit includes a plurality of uniform distribution rods; the plurality of uniform distribution rods slide along the axial direction of the guide fan and are located at one end of the guide fan near the uniform distribution net; the two ends of the uniform distribution rods are respectively connected to the guide fan by elastic elements; the elastic elements and the uniform distribution rods are arranged radially along the guide fan.

[0025] By adopting the above technical solution, a radially sliding distribution rod is installed on the guide fan. Utilizing the centrifugal force generated by changes in the size of the oil fume airflow, combined with the elastic element, the distribution rod adaptively reciprocates, further dispersing the oil fumes and water mist, enhancing the gas-liquid mixing effect, and improving the uniformity of the flue gas distribution. Dynamically dispersing the flue gas and spraying water allows some of the oil in the fumes to be captured by the water mist in advance, reducing the filtration load on subsequent filter units and improving the overall oil fume purification efficiency and service life.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By sequentially setting up a flue gas distribution unit and multiple filter screen units within the filter box, and coordinating with branch pipe spraying to form a uniform water film on the filter screen surface, kitchen fumes can be graded and purified efficiently. Multiple filter screens are arranged vertically in a stepped manner, with a water storage tank at the top of each filter screen group. The water storage tank temporarily stores water, ensuring a stable overflow. Combined with the stepped, layered arrangement, this ensures a stable water film formation on each filter screen group, preventing water film breakage due to water supply fluctuations and ensuring stable and reliable filtration. The water replenishment unit can promptly replenish the water evaporated from the water storage tank, ensuring a stable water film formation.

[0027] 2. Utilizing the density difference between oil and water, the floating plate adapts to the water level in the tank, automatically rising to collect and separate oil sludge, efficiently achieving automatic oil-water stratification and isolation. After the floating plate rises and falls with the water level, it drives the drive rod, arc-shaped component, and rack to move vertically. Through the meshing transmission of the rack and residual gear, it automatically drives the water supply pipe to rotate and open / close the water supply port. The sliding rod is vertically limited along the sliding hole to ensure smooth and precise rack movement. During the water supply process, the sprayed water can drive the filter element to rotate, dumping the oil sludge at the top of the filter tank towards the drain port, improving the oil separation efficiency. When the filter element rotates, it can slide along the arc-shaped component. When the water level in the filter tank rises and causes the floating plate to move upward, the sliding rod can pull the arc-shaped component to drive the rack upward, thereby driving the water supply pipe to rotate, ensuring that the water supply pipe rotates smoothly according to the water level changes in the water storage tank and filter tank, and stably replenishing water in the water storage tank.

[0028] 3. Utilizing the inherent flow dynamics of the cooking fumes to drive the rotation of the guide fan requires no additional power, resulting in energy savings and a simple structure. It effectively disperses and agitates the fumes entering the chamber, achieving initial uniform distribution and preventing localized high concentrations that could negatively impact subsequent filtration. Water distribution pipes surround the guide fan, continuously spraying water onto the blades. The centrifugal force of the guide fan evenly distributes the water mist onto the uniformly distributed mesh, forming a uniform water film on the mesh surface for preliminary washing and pre-filtration of the cooking fumes. The guide fan and uniformly distributed mesh are sequentially arranged along the airflow direction, forming a progressive pre-treatment structure of first equalizing the flow, then spraying, and finally coarse filtration. This provides a uniform and stable airflow for the subsequent deep purification by the filter unit, improving overall fume purification efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a kitchen oil fume heat recovery unit.

[0030] Figure 2 This is a schematic diagram of the internal structure of a kitchen fume heat recovery unit.

[0031] Figure 3 This is a schematic diagram of the filter unit in the embodiment.

[0032] Figure 4 yes Figure 2 A magnified view of part A in the image.

[0033] Figure 5 This is a schematic diagram of the internal components of the water storage tank in the embodiment.

[0034] Figure 6 yes Figure 5 A magnified view of part B in the image.

[0035] Figure 7 This is a schematic diagram of the filter element in the embodiment.

[0036] Figure 8 yes Figure 7 A magnified view of part C.

[0037] Figure 9 This is a diagram showing the connection relationship between the water supply pipe and the connecting pipe in the embodiment.

[0038] Figure 10 This is a schematic diagram of the uniformly distributed network in the embodiment.

[0039] Figure 11 This is a schematic diagram of the flue gas distribution unit in the embodiment.

[0040] Figure 12 This is a schematic diagram of the uniformly distributed rod in the embodiment.

[0041] Figure 13 yes Figure 12 A magnified view of part of D.

[0042] Explanation of reference numerals in the attached drawings: 1. Filter housing; 11. Main pipe; 12. Branch pipe; 13. Smoke inlet; 14. Smoke outlet; 2. Smoke distribution unit; 21. Water distribution pipe; 22. Guide fan; 23. Distribution screen; 24. Distribution rod; 241. Elastic element; 3. Filter screen unit; 31. Mounting bracket; 32. Filter screen assembly; 321. Connecting seat; 3211. Water storage tank; 3212. Drain outlet; 3213. Groove; 3214. Drive clearance; 322, Filter screen; 4, Water supply unit; 41, Water supply pipe; 411, Water supply port; 412, Residual gear; 42, Connecting pipe; 5, Filter element; 51, Filter tank; 511, Water inlet space; 512, Sedimentation space; 52, Drain outlet; 6, Floating plate; 61, Drive rod; 7, Baffle; 71, Partition; 72, Flow guide; 8, Smoke baffle; 9, Slide rod; 91, Rack; 911, Arc component. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-13 This application will be described in further detail.

[0044] This application discloses a kitchen fume heat recovery device. (Refer to...) Figure 1-2The system includes a filter housing 1, which is welded from a 1.5mm thick stainless steel plate and has an overall size of 1.2m × 1.2m × 1.2m. The top plate of the filter housing 1 is separate from the housing body. The top plate of the filter housing 1 is connected to the housing body by bolts. After removing the top plate of the filter housing 1, the interior of the filter housing 1 can be repaired. An inspection port is provided on the top plate of the filter housing 1, and an inspection cover is closed on the inspection port. The inspection cover is connected to the top plate of the filter housing 1 by bolts. After opening the inspection cover, the interior of the filter housing 1 can be easily observed. Inside the filter housing 1, a flue gas distribution unit 2 and multiple filter screen units 3 are arranged sequentially along the flue gas flow direction. The flue gas distribution unit 2 can perform preliminary filtration of kitchen fumes, and then the multiple filter screen units 3 perform deep filtration.

[0045] It should be noted that a smoke inlet 13 and a smoke outlet 14 are respectively provided at both ends of the filter box 1; the oil fumes enter the filter box 1 from the smoke inlet 13, pass through the flue gas distribution unit 2 and multiple filter screen units 3 in sequence, and are finally discharged from the smoke outlet 14.

[0046] A water supply source, a main pipe 11, and multiple branch pipes 12 are installed on the filter housing 1. Both ends of the main pipe 11 are connected to the water supply source and the multiple branch pipes 12, respectively. A water pump is installed at the connection between the main pipe 11 and the water supply source, with the following parameters: flow rate 3 m³ / h, head 14 meters. The multiple branch pipes 12 are located directly above multiple filter screen units 3. The water supply source can flow into the multiple branch pipes 12 through the main pipe 11. Detergent is mixed in the water, with sodium hydroxide as the main component. The mixture is added to the water to... The water becomes an alkaline solution; multiple water outlets are provided on the branch pipe 12 along the width of the filter unit 3; the openings of the water outlets face downwards and are directly opposite the filter unit 3; the water in the branch pipe 12 flows downwards from the multiple water outlets and flows evenly above the filter unit 3, forming an alkaline water film on the filter unit 3; the water film can effectively block and filter impurities in the oil fumes and flows to the bottom of the filter box 1; the bottom of the filter box 1 has a water layer with a height of 200mm; the bottom of the filter unit 3 is flush with the filter box. There is a 100mm gap between the bottom walls of filter box 1, allowing the bottom end of filter screen unit 3 to extend into the water layer at the bottom of filter box 1 and achieve a water seal effect; a 20mm diameter drain pipe is installed on the bottom wall of filter box 1, and the drain pipe is connected to a drain valve; this allows the water layer at the bottom of filter box 1 to be fully drained, achieving a sewage discharge effect; a 20mm diameter water inlet 411 is installed on the side wall of filter box 1, and the water inlet 411 is connected to a water supply source; a float valve is installed inside the water inlet 411. The float valve moves synchronously with the rise and fall of the water level in the tank. When the water level in the filter tank 1 drops below the set level of 200mm due to oil fume cleaning and sewage discharge or natural water loss, the float sinks with the water level, which drives the valve stem inside to open the valve, and the water inlet 411 is connected, so that the water supply source continuously replenishes water into the filter tank 1. When the water level in the tank rises to the standard height of 200mm, the buoyancy drives the float to rise and closes the valve, cutting off the water supply passage and stopping the water inlet; ensuring that the bottom of the filter tank 1 maintains a water level of 200mm.

[0047] Specifically, refer to Figures 2 to 4 The filter unit 3 includes a mounting frame 31 and multiple filter groups 32 located inside the mounting frame 31. The multiple filter groups 32 are connected vertically and in a stepped manner. Each filter group 32 includes a connecting seat 321 and a filter screen 322. The connecting seat 321 is mounted on the mounting frame 31. The top of the filter screen 322 is connected to the connecting seat 321. The bottom of the filter screen 322 is connected to the connecting seat 321 of the next filter group 32. The top wall of each filter group 32 (the top wall of the connecting seat 321) has a water storage tank 3211. The water storage tank 3211 can store a certain amount of water to ensure that the downward water flow remains stable and forms a stable water film on the filter screen 322. Rubber sealing blocks are provided between the branch pipe 12 and the connecting seat 321, and between the branch pipe 12 and the top plate of the filter box 1.

[0048] Reference Figures 4 to 7 A drain port 3212 is provided on the side of the connecting seat 321 near the flue gas distribution unit 2; a baffle plate 8 is provided at the end of the drain port 3212 near the flue gas distribution unit 2; the baffle plate 8 can prevent the oil fumes discharged from the flue gas distribution unit 2 from entering the water storage tank 3211 through the drain port 3212; a filter element 5 is rotatably provided at the drain port 3212; the filter element 5 is located above the water storage tank 3211; a filter groove 51 is provided on the filter element 5; a drain outlet 52 is provided on the bottom wall of the filter groove 51; specifically, a rotating shaft is provided on the top of the filter element 5 near the drain port 3212; the rotating shaft is rotatably connected to the connecting seat 321.

[0049] A baffle 7 is provided inside the filter tank 51; the baffle 7 has a vertically arranged partition 71 and a horizontally inclined guide 72; the partition 71 divides the internal space of the filter tank 51 into an inlet space 511 and a sedimentation space 512; the guide 72 is located above the drain outlet 3212, blocking the upper part of the sedimentation space 512; a floating plate 6 is vertically slidably arranged inside the sedimentation space 512 of the filter tank 51; the floating plate 6 is a 304 stainless steel hollow plate; the length of the floating plate 6 is 1130cm, the width is 4cm, and the height is 10cm; the wall thickness of the floating plate 6 is set between 0.8 mm and 1.2 mm, so that the overall average density of the floating plate 6 is less than the density of the water, ensuring that the floating plate 6 floats stably on the water surface.

[0050] The washing water flowing down from branch pipe 12 falls onto guide section 72 and is guided into water inlet space 511; part of the water in water inlet space 511 flows from drain outlet 52 into water storage tank 3211 below; part of the water enters sedimentation space 512; the water surface in filter tank 51 is flush with the water surface in water storage tank 3211; when water storage tank 3211 is full, to prevent water in filter tank 51 from overflowing from drain outlet 3212, the top of water storage tank 3211 needs to be lower than the top of filter element 5 on the side near drain outlet 3212; in sedimentation space 512, because the density of oil is less than that of water and float plate, the oil in sedimentation space 512 will float and accumulate on float plate; as the amount of oil increases, the oil overflows from drain outlet 3212 and is discharged.

[0051] Because the interior of the filter box 1 is a high-temperature environment, the water in the filter screen 322 and the water storage tank 3211 will evaporate, causing the amount of water flowing downward from the filter screen 322 into the water storage tank 3211 below to gradually decrease. As a result, the amount of water in the water storage tank 3211 continuously decreases, and the amount of water flowing downward from the water storage tank 3211 decreases, making the water film on the filter screen 322 unstable. Therefore, a water replenishment unit 4 is provided in the water storage tank 3211 to replenish the water in the water storage tank 3211.

[0052] Reference Figure 5 , Figure 7 and Figure 9 The water replenishment unit 4 includes a water replenishment pipe 41 and two connecting pipes 42; the two connecting pipes 42 are respectively disposed on both sides of the mounting bracket 31; the two connecting pipes 42 are respectively connected to the main pipe 11; an arc-shaped groove 3213 is formed on the inner wall of the water storage tank 3211 along its length; the side wall of the water replenishment pipe 41 fits against the side wall of the groove 3213; both ends of the water replenishment pipe 41 pass through the connecting seat 321 and are rotatably connected to the two connecting pipes 42 respectively, and are respectively connected to the two connecting pipes 42; water in the main pipe 11 flows into the connecting pipes 42 and the water replenishment pipe 41 in sequence; a water replenishment port 411 is formed on the water replenishment pipe 41; after the water replenishment pipe 41 is rotated, the water replenishment port 411 is located at or protrudes from the groove 3213. When the water inlet 411 is located in the groove 3213, the inner wall of the groove 3213 blocks the water inlet 411; there is a drive gap 3214 between the side wall of the filter element 5 and the side wall of the water storage tank 3211; when the water inlet 411 protrudes from the groove 3213, the water inlet 411 is directly opposite the drive gap 3214; the water in the water inlet pipe 41 flows from the water inlet 411 into the drive gap 3214, increasing the water pressure in the drive gap 3214, and then driving the filter element 5 to rotate in the direction of the drain outlet 3212 with the rotating shaft as the axis through the water flow; the oil on the float is poured into the drain outlet 3212, improving the oil discharge efficiency; at the same time, the water inlet 3211 is also replenished.

[0053] Reference Figures 5 to 8 The bottom wall of the water storage tank 3211 has multiple sliding holes vertically arranged; each sliding rod 9 is slidably arranged vertically in the multiple sliding holes; a rack 91 is provided at the top of the sliding rod 9; multiple sets of residual gears 412 are provided on the water supply pipe 41; multiple racks 91 mesh with multiple sets of residual gears 412 respectively; an arc part 911 is provided on the rack 91; multiple drive rods 61 are provided at the bottom of the floating plate 6; the bottom ends of the multiple drive rods 61 pass through the filter element 5 respectively; the bottom ends of the multiple drive rods 61 are provided with arc grooves that cooperate with the arc parts 911; the arc parts 911 are slidably arranged in the arc grooves.

[0054] When the water level in the sedimentation space 512 drops, the floating plate 6 and the drive rod 61 drop with the water level; the drive rod 61 pushes the arc part 911 and the rack 91 to move downward, and drives the residual gear 412 and the water supply pipe 41 to rotate; so that the water supply port 411 gradually disengages from the groove 3213.

[0055] When the water inlet 411 protrudes from the groove 3213 and pushes the filter element 5 to rotate through water pressure, the floating plate 6 and the drive rod 61 rotate synchronously. At this time, the rack 91 and the residual gear 412 remain engaged. The drive rod 61 slides relative to the arc part 911 with the rotating shaft as the axis. As the water level in the water storage tank 3211 and the sedimentation space 512 rises, the floating plate 6 moves upward, and the drive rod 61 pulls the arc part 911 and the rack 91 to gradually move upward. The residual gear 412 drives the water supply pipe 41 to rotate in the opposite direction. The sliding rod 9, which extends into the sliding hole, can limit the rack 91 to ensure that the rack 91 and the arc part 911 maintain vertical displacement. When the water inlet 411 protrudes into the groove 3213, the filter element 5 rotates downward and resets under its own weight, and drives the sliding rod 9 to slide and reset along the arc part 911. At this time, the water in the water storage tank 3211 is replenished.

[0056] Reference Figures 10 to 13 The flue gas distribution unit 2 includes a water distribution pipe 21 and a guide fan 22 and a distribution net 23 arranged sequentially along the flue gas flow direction; the distribution net 23 is installed inside the filter box 1; one end of the smoke inlet 13 of the filter box 1 is defined as the front end of the filter box 1, and one end of the smoke outlet 14 of the filter box 1 is defined as the rear end of the filter box 1; the distribution net 23 is located in front of multiple filter screen units 3; the guide fan 22 is rotatably installed inside the filter box 1; the flowing oil fumes can drive The guide fan 22 rotates and is evenly distributed on the uniform distribution net 23 under the action of the guide fan 22; the water distribution pipe 21 is arranged around the guide fan 22; the water distribution pipe 21 is connected to the main pipe 11, and the inner side of the water distribution pipe 21 is evenly provided with water spray holes; the water in the water spray holes flows into the fan blades of the guide fan 22, and after the guide fan 22 rotates, it can spray water onto the uniform distribution net 23 and form a water film on the uniform distribution net 23, thereby achieving the preliminary filtration of oil fumes and the uniform distribution effect of oil fumes.

[0057] The flue gas distribution unit 2 includes multiple distribution rods 24; the multiple distribution rods 24 slide along the axial direction of the guide fan 22 and are located at one end of the guide fan 22 near the distribution net 23; the two ends of the distribution rods 24 are respectively connected to the guide fan 22 by elastic elements 241; the elastic elements 241 are springs; the elastic elements 241 and the distribution rods 24 are arranged radially along the guide fan 22; due to the unstable power generated by the oil fumes, the rotation speed of the guide fan 22 changes continuously. When the rotation speed of the guide fan 22 increases, the distribution rods 24 are driven to move to the outside of the guide fan 22 by centrifugal force. When the rotation speed of the guide fan 22 decreases, the distribution rods 24 move to the inside of the guide fan 22 under the tension of the elastic elements 241. The continuously sliding distribution rods 24 can effectively disperse and mix the flue gas and water, further enhancing the uniformity of the oil fumes and the mixing effect of water and oil fumes.

[0058] The working principle of a kitchen fume heat recovery device in this application is as follows: Kitchen fumes enter the filter box 1 through the inlet 13 and first flow through the flue gas distribution unit 2: the flowing fumes drive the guide fan 22 to rotate autonomously, and in conjunction with the peripheral water distribution pipes 21 to spray alkaline washing water, the guide fan 22 rotates to evenly spread the water onto the surface of the distribution net 23. At the same time, in conjunction with the radially sliding distribution rod 24, the centrifugal force and the reciprocating extension and retraction of the elastic element 241 are used to disperse the disordered fumes and enhance the thorough mixing of fumes and washing water, thus completing the initial filtration of fumes and the even distribution of fumes.

[0059] After initial treatment, the oil fumes flow backward and enter multiple sets of stepped filter units 3. Driven by a water pump, the water supply delivers an alkaline aqueous solution containing sodium hydroxide through the main pipe 11 to each branch pipe 12. The water outlets at the bottom of the branch pipes 12 spray downwards evenly, continuously forming an alkaline water film on the surface of each filter layer 322, adsorbing and intercepting oil fumes, grease, dust, and impurities. Each filter group 32 is equipped with a water storage tank 3211 at the top to store a fixed amount of washing water, ensuring a continuous and stable water flow, maintaining a uniform and continuous water film, and improving the deep purification effect.

[0060] Wastewater from washing, carrying oil and impurities, flows downwards to the bottom of filter housing 1. The bottom of the housing maintains a constant water level of 200mm, with the bottom of the filter screen submerged in water to form a water seal, preventing flue gas from escaping from the bottom. A float valve on the side wall monitors the water level in real time; when the water level is low, it automatically opens the water inlet 411 to allow water in; once the water level reaches the target level, it automatically closes the water inlet to maintain a constant level. Accumulated wastewater at the bottom can be periodically drained and replaced via the drain pipe and drain valve.

[0061] After the washing water falls into the filter tank 51 in the connector 321, it is divided into an inlet space 511 and a sedimentation space 512 by the baffle 7. The water in the inlet space 511 continuously replenishes the water storage tank 3211. In the sedimentation space 512, the oil sludge, because its density is lower than that of the water, floats and accumulates above the floating plate 6. As the oil sludge accumulates, it overflows and is discharged through the drain outlet 3212. The smoke baffle 8 can prevent smoke from entering the water storage tank 3211 and interfering with the stability of the water film.

[0062] The high temperature inside the filter box 1 can easily cause water evaporation. Insufficient water in the water storage tank 3211 can lead to the water film breaking and failure. Therefore, a water replenishment unit 4 is set in the water storage tank 3211: water from the main pipe 11 flows through the connecting pipe 42 into the rotatable water replenishment pipe 41. Under normal conditions, the water inlet 411 is sealed against the groove 3213. When the water level in the sedimentation space 512 drops, the floating plate 6 moves down with the water level, driving the drive rod 61, the arc part 911, and the rack 91 to move vertically. Through the meshing of the rack 91 and the residual gear 412, the water replenishment pipe 41 is driven to rotate, causing the water inlet 411 to detach from the groove 3213 and water to flow out, thus simultaneously completing the water replenishment of the water storage tank 3211.

[0063] Water from the inlet 411 enters the drive gap 3214, pushing the filter element 5 to rotate and dumping the oil accumulated on the floating plate 6 into the drain outlet 3212 for rapid discharge. After the water level rises, the floating plate 6 rises, driving the drive rod 61 to pull the arc part 911 and the rack 91 upward. The rack 91 drives the residual gear 412 and the water supply pipe 41 to reverse until the groove 3213 seals the inlet 411.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A kitchen oil fume heat recovery device, characterized in that: The filter includes a filter housing (1); a flue gas distribution unit (2) and multiple filter screen units (3) are arranged sequentially along the flue gas flow direction inside the filter housing (1); a water supply source, a main pipe (11) and multiple branch pipes (12) are provided on the filter housing (1); the two ends of the main pipe (11) are respectively connected to the water supply source and the multiple branch pipes (12); the multiple branch pipes (12) are respectively located directly above the multiple filter screen units (3); multiple water outlet holes are opened on the branch pipes (12) along the width direction of the filter screen units (3); the filter screen unit (3) includes a mounting frame (31) and multiple filter screen groups (32) located inside the mounting frame (31); the multiple filter screen groups (32) are connected sequentially in a vertical and stepped manner; the top wall of each filter screen group (32) has a water storage tank (3211); a water replenishment unit (4) is provided in the water storage tank (3211).

2. The kitchen fume heat recovery device according to claim 1, characterized in that: The filter assembly (32) includes a connecting seat (321) and a filter screen (322); the connecting seat (321) is disposed on the mounting bracket (31); the top end of the filter screen (322) is connected to the connecting seat (321); the lower end of the filter screen (322) is connected to the connecting seat (321) of the next filter assembly (32); the water storage tank (3211) is formed on the connecting seat (321).

3. A kitchen fume heat recovery device according to claim 2, characterized in that: A drain port (3212) is provided on the side of the connecting seat (321) near the flue gas distribution unit (2); a filter element (5) is rotatably provided at the drain port (3212); the filter element (5) is located above the water storage tank (3211); a filter groove (51) is provided on the filter element (5); and a drain port (52) is provided on the bottom wall of the filter groove (51).

4. A kitchen fume heat recovery device according to claim 3, characterized in that: A floating plate (6) is vertically slidably disposed inside the filter tank (51).

5. A kitchen fume heat recovery device according to claim 3, characterized in that: A baffle (7) is provided inside the filter tank (51); the baffle (7) has a vertically arranged partition (71) and a horizontally inclined guide (72); the guide (72) is located above the drain outlet (3212).

6. A kitchen fume heat recovery device according to claim 3, characterized in that: A smoke baffle (8) is provided at one end of the sewage outlet (3212) near the flue gas distribution unit (2).

7. A kitchen fume heat recovery device according to claim 4, characterized in that: The water replenishment unit (4) includes a water replenishment pipe (41) and two connecting pipes (42); the two connecting pipes (42) are respectively disposed on both sides of the mounting bracket (31); the two connecting pipes (42) are respectively connected to the main pipe (11); a groove (3213) is provided on the inner wall of the water storage tank (3211) along its length direction; the side wall of the water replenishment pipe (41) is fitted with the side wall of the groove (3213); the two ends of the water replenishment pipe (41) pass through the connecting seat (321) and are rotatably connected to the two connecting pipes (42) respectively, and are respectively connected to the two connecting pipes (42); a water replenishment port (411) is provided on the water replenishment pipe (41); after the water replenishment pipe (41) is rotated, the water replenishment port (411) is located in or protrudes from the groove (3213).

8. A kitchen fume heat recovery device according to claim 7, characterized in that: The bottom wall of the water storage tank (3211) is provided with multiple sliding holes along the vertical direction; each of the multiple sliding holes is provided with a sliding rod (9) along the vertical direction; a rack (91) is provided on the top of the sliding rod (9); multiple sets of residual gears (412) are provided on the water supply pipe (41); multiple racks (91) mesh with multiple sets of residual gears (412); an arc part (911) is provided on the rack (91); multiple drive rods (61) are provided at the bottom of the floating plate (6); an arc groove that mates with the arc part (911) is provided at the bottom end of each of the multiple drive rods (61); the arc part (911) is slidably disposed in the arc groove.

9. A kitchen fume heat recovery device according to claim 1, characterized in that: The flue gas distribution unit (2) includes a water distribution pipe (21) and a guide fan (22) and a distribution net (23) arranged sequentially along the flue gas flow direction; the guide fan (22) is rotatably disposed inside the filter box (1); the water distribution pipe (21) surrounds the periphery of the guide fan (22); the distribution net (23) is disposed inside the filter box (1).

10. A kitchen fume heat recovery device according to claim 9, characterized in that: The flue gas distribution unit (2) includes multiple distribution rods (24); the multiple distribution rods (24) slide along the axial direction of the guide fan (22) and are located at one end of the guide fan (22) near the distribution net (23); the two ends of the distribution rods (24) are respectively connected to the guide fan (22) by elastic elements (241); the elastic elements (241) and the distribution rods (24) are arranged radially along the guide fan (22).

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