Flue gas filter for kitchen and use method of flue gas filter

Abstract

The invention discloses a flue gas filter for a kitchen and a using method thereof. The flue gas filter comprises an air bellow, a bottom frame is fixedly installed at the bottom end of the air bellow, a position adjusting mechanism is arranged in the bottom frame, and an opening and closing mechanism is arranged between the air bellow and the bottom frame; the case is arranged outside one side of the air bellow, an exhaust fan is arranged in the case, the air inlet end of the exhaust fan is communicated with the air bellow, and the air outlet end of the exhaust fan is communicated with a water tank through an output pipe; an overflow mechanism is arranged at the upper end of the right side in the water tank, and a separation box is arranged outside the right side of the water tank. The exhaust fan sucks oil fume into the water tank, water is used for treating the oil fume, oil grease in the oil fume floats on the water surface, water vapor is fused into the water, preliminary oil fume separation is achieved, the separation mode based on physical properties is simple and effective, most of the oil grease in the oil fume can be rapidly removed, and the burden of subsequent treatment is reduced.

Description

Technical Field

[0001] The invention relates to the field of kitchenware, in particular to a smoke filter used in a kitchen and a use method thereof. Background Art

[0002] In modern life, kitchen fumes are a common problem. Whether it is a home kitchen or a kitchen in a restaurant, a large amount of fumes are generated during the cooking process. Fumes contain a variety of harmful substances, such as grease particles, volatile organic compounds, polycyclic aromatic hydrocarbons, etc. These substances not only pollute the kitchen environment, making surfaces such as kitchen utensils, walls and ceilings covered with oil stains and difficult to clean, but also cause harm to human health. People who are exposed to the fumes for a long time may develop respiratory diseases, skin problems, and increase the risk of lung cancer.

[0003] Traditional range hoods mainly use fans to suck in oil smoke, and then use simple filters to filter out some larger particles of grease before directly exhausting the oil smoke to the outside. Its filtering effect on oil smoke is limited, and a large number of fine grease particles and harmful substances will still be emitted into the environment with the exhaust gas, causing pollution to the outdoor environment. In addition, the grease intercepted by the filter is easy to accumulate on the filter, and the filter needs to be cleaned regularly, otherwise it will affect the exhaust efficiency of the range hood. Summary of the invention

[0004] The object of the present invention is to provide a smoke filter for kitchen and a method of using the same to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A fume filter for a kitchen, comprising

[0007] A bellows, a bottom frame is fixedly mounted at the bottom end of the bellows, a position adjustment mechanism is arranged inside the bottom frame, and an opening and closing mechanism is arranged between the bellows and the bottom frame;

[0008] A chassis is arranged outside one side of the bellows, an exhaust fan is arranged inside the chassis, an air inlet end of the exhaust fan is connected to the bellows, and an air outlet end of the exhaust fan is connected to a water tank through an output pipe;

[0009] An overflow mechanism is arranged at the upper right end of the interior of the water tank, a separation box is arranged outside the right side of the water tank, and an oil-water separation mechanism is arranged at the upper inner end of the separation box.

[0010] In the present invention, the position adjustment mechanism includes a screw rod, a plurality of screw rods are arranged side by side at the lower part of the base frame, a shell is arranged on the left side outside the bottom end of the base frame, and motors equal to the number of the screw rods are arranged side by side inside the shell, the output shafts of the motors are fixedly connected to the screw rods, a movable block is movably installed outside the screw rod, a top block is arranged on the top of the movable block, corrugated rubber sleeves are arranged on both sides of the top block and the base frame and on the outside of the screw rod, and a guide groove matching the top block is arranged at the upper end of the inner part of the base frame.

[0011] In the present invention, the opening and closing mechanism includes an air inlet pipe, and a plurality of air inlet pipes are arranged side by side at the lower part of the interior of the bellows, a movable column is movably sleeved inside the air inlet pipe, exhaust ports are provided on both sides of the upper end of the movable column, air inlets are provided on both sides of the lower end of the movable column, and an air path connected to the exhaust port and the air inlet is provided in the middle part of the inner side of the movable column.

[0012] In the present invention, the end surfaces of the top block and the movable column on the same side are both arc-shaped structures.

[0013] In the present invention, limit blocks are arranged on the upper ends of both sides of the movable column, and a counterweight block is fixedly installed in the middle of the top end of the movable column.

[0014] In the present invention, a nozzle is also arranged in the middle of the inner side of the water tank, the top end of the nozzle is connected with the output pipe through a joint 1, and a water supply pipe and a drainage pipe are respectively arranged at the upper and lower ends of the middle of the front side of the water tank.

[0015] In the present invention, a serpentine pipe is further arranged at the lower part of the water tank, and two joints connected to the serpentine pipe are arranged at both ends below the front side of the water tank.

[0016] In the present invention, the overflow mechanism includes an overflow port, which is opened between the water tank and the upper end of the separation box, a suspension rod is vertically arranged at the upper right end inside the water tank, a mounting seat is movably installed outside the suspension rod, a spring is arranged between the mounting seat and the upper end of the water tank and located outside the suspension rod, a cross plate is horizontally arranged on the right side of the mounting seat, a buoyancy plate is arranged at the bottom end of the cross plate, and a baffle is vertically arranged at the upper right end of the cross plate.

[0017] In the present invention, the oil-water separation mechanism includes a mounting plate, which is symmetrically arranged on both sides of the inner upper end of the separation box, a hydrophilic and oleophobic membrane is arranged in the middle of the mounting plate, an oil outlet pipe is arranged on the right side of the separation box and close to the upper end of the hydrophilic and oleophobic membrane, and a water outlet pipe is connected to the outside of the right bottom end of the separation box.

[0018] A method for using a smoke filter for a kitchen comprises the following steps:

[0019] Step 1: When in use, start the exhaust fan, which draws the oil smoke from the bottom of the base frame and sends it into the water tank through the output pipe. The grease in the oil smoke floats on the water surface, and the water vapor in the oil smoke dissolves into the water, and the liquid level inside the water tank rises. As the liquid level rises, the grease lifts the buoyancy plate, and the buoyancy plate drives the baffle on one side of the horizontal plate to rise, and at the same time drives the mounting seat to compress the spring until the top of the baffle abuts against the right corner inside the water tank, so that the grease on the water surface enters the separation box from the overflow port. As the grease decreases, the spring in the compressed state rebounds to control the horizontal plate to descend, and after the horizontal plate descends, it drives the baffle to block the overflow port again;

[0020] Step 2: After the grease enters the separation box from the overflow port, it is separated by the hydrophilic oleophobic membrane for the second time. A small amount of water passes through the hydrophilic oleophobic membrane and falls below the separation box and flows into the water outlet pipe, while the grease intercepted by the hydrophilic oleophobic membrane flows into the oil outlet pipe along the right side.

[0021] Step 3: When the smoke is sprayed into the water in the water tank through the nozzle, the heat in the smoke is absorbed by the water in the water tank, and the cold water circulating in the serpentine absorbs the heat and is connected to the external water tank through the second connector for use;

[0022] Step 4: When the number of exhaust vents needs to be adjusted according to the usage of the kitchen stove, the motor at the corresponding position is started. After the motor is started, the screw is driven to rotate. After the screw rotates, the movable block is driven to move horizontally. After the movable block moves horizontally, the top block is driven to move synchronously. When the top block moves to the bottom of the movable column at the corresponding position, it is lifted. After the movable column is lifted, the exhaust port at its upper end is exposed from the upper end of the air inlet pipe, so that the smoke can enter the air path from the air inlet and then enter the bellows through the exhaust port.

[0023] Step 5. When the exhaust port at this position needs to be closed, the top block is moved away from the bottom of the movable column by controlling the motor. At this time, the counterweight block on the top of the movable column falls due to gravity, so that the exhaust port at the upper end of the movable column is blocked by the air inlet pipe.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The exhaust fan of the present invention draws the oil smoke into the water tank and uses water to process the oil smoke. Since the grease in the oil smoke floats on the water surface and the water vapor merges into the water, the preliminary separation of the oil smoke is achieved. The separation method based on physical properties is simple and effective, and can quickly remove most of the grease in the oil smoke, reducing the burden of subsequent treatment;

[0026] 2. In the present invention, as the liquid level in the water tank rises, the grease lifts the buoyancy plate, driving the baffle to rise, so that the grease enters the separation box from the overflow port. When the grease decreases, the spring rebounds to control the baffle to block the overflow port again, which can accurately control the overflow of the grease and ensure that only the grease enters the separation box, avoiding a large amount of water from mixing in. In the separation box, the hydrophilic oleophobic membrane further separates the grease for a second time, completely separating a small amount of mixed water from the grease, so that the recovered grease has a higher purity, which is very beneficial for the recycling of grease;

[0027] 3. The present invention drives the screw to rotate through a motor, thereby controlling the movement of the movable block and the top block to realize the opening and closing of the exhaust vents. The number of exhaust vents can be accurately adjusted according to the usage of the kitchen stove. When only one stove is used, other unnecessary exhaust vents can be closed, which can reduce the power consumption of the exhaust fan and improve the local exhaust effect, so that the exhaust is more concentrated above the stove in use, thereby improving the flexibility and adaptability of the entire smoke filtration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of a smoke filter for kitchens according to the present invention;

[0029] Figure 2 This is a schematic diagram of the installation of an exhaust fan for a smoke filter used in a kitchen according to the present invention;

[0030] Figure 3 This is a schematic diagram of the installation of a motor for a smoke filter used in a kitchen according to the present invention;

[0031] Figure 4 This is a schematic diagram of the installation of a nozzle of a smoke filter for a kitchen according to the present invention;

[0032] Figure 5 A smoke filter for kitchens according to the present invention Figure 2 An enlarged schematic diagram of A in FIG.

[0033] Figure 6 A smoke filter for kitchens according to the present invention Figure 4 An enlarged schematic diagram of point B in FIG.

[0034] Figure 7 A smoke filter for kitchens according to the present invention Figure 4 An enlarged schematic diagram of point C in FIG.

[0035] In the figure: 1. bellows; 2. base frame; 3. chassis; 4. exhaust fan; 5. output pipe; 6. water tank; 7. separation box; 8. screw; 9. casing; 10. motor; 11. movable block; 12. top block; 13. air inlet pipe; 14. movable column; 15. exhaust port; 16. air inlet; 17. air path; 18. limit block; 19. counterweight; 20. corrugated rubber sleeve; 21. nozzle; 22. joint one; 23. water supply pipe; 24. drain pipe; 25. serpentine pipe; 26. joint two; 27. overflow port; 28. suspension rod; 29. ​​mounting seat; 30. spring; 31. cross plate; 32. buoyancy plate; 33. baffle; 34. mounting plate; 35. hydrophilic and oleophobic membrane; 36. oil outlet pipe; 37. water outlet pipe; 38. guide groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figure 1-7 As shown, the present invention provides a technical solution:

[0038] A smoke filter for a kitchen, comprising a bellows 1, a base frame 2 is fixedly installed at the bottom end of the bellows 1, a position adjustment mechanism is arranged inside the base frame 2, the position adjustment mechanism comprises a screw 8, a plurality of screws 8 are arranged side by side at the bottom of the base frame 2, a shell 9 is arranged outside the left side of the bottom end of the base frame 2, motors 10 equal to the number of the screws 8 are arranged side by side inside the shell 9, the output shaft of the motor 10 is fixedly connected to the screw 8, a movable block 11 is movably installed outside the screw 8, a top block 12 is arranged at the top of the movable block 11, a corrugated rubber sleeve 20 is arranged on both sides of the top block 12 and the base frame 2 and outside the screw 8, and a corrugated rubber sleeve 20 is arranged at the upper end of the base frame 2 to be connected to the top block 12 Matching guide grooves 38, an opening and closing mechanism is arranged between the bellows 1 and the base frame 2, the opening and closing mechanism includes an air inlet pipe 13, a plurality of air inlet pipes 13 are arranged side by side at the lower part of the bellows 1, a movable column 14 is movably sleeved inside the air inlet pipe 13, exhaust ports 15 are provided on both sides of the upper end of the movable column 14, air inlets 16 are provided on both sides of the lower end of the movable column 14, an air path 17 connected to the exhaust port 15 and the air inlet 16 is provided in the middle of the inner side of the movable column 14, the end faces of the top block 12 and the movable column 14 on the same side are both arc-shaped structures, limit blocks 18 are provided on the upper ends of both sides of the movable column 14, and a counterweight block 19 is fixedly installed in the middle of the top end of the movable column 14;

[0039] like Figure 1, Figure 4 , Figure 6 and Figure 7 As shown, a chassis 3 is arranged outside one side of the wind box 1, and an exhaust fan 4 is arranged inside the chassis 3. The air inlet end of the exhaust fan 4 is connected to the wind box 1, and the air outlet end of the exhaust fan 4 is connected to the water tank 6 through an output pipe 5. A nozzle 21 is also arranged in the middle of the inner side of the water tank 6, and the top of the nozzle 21 is connected to the output pipe 5 through a joint 1 22. A water supply pipe 23 and a drainage pipe 24 are respectively arranged at the upper and lower ends of the front middle of the water tank 6. A serpentine pipe 25 is further arranged at the lower part of the water tank 6, and joints 26 connected to the serpentine pipe 25 are arranged at both ends of the lower front of the water tank 6. An overflow mechanism is arranged at the upper right end of the water tank 6, and the overflow mechanism includes an overflow port 27. The overflow port 27 is opened between the water tank 6 and the upper end of the separation box 7. A vertical overflow port 27 is arranged at the upper right end of the water tank 6. A suspension rod 28 is provided, and a mounting seat 29 is movably installed on the outside of the suspension rod 28. A spring 30 is provided between the mounting seat 29 and the upper end of the water tank 6 and located on the outside of the suspension rod 28. A cross plate 31 is horizontally provided on the right side of the mounting seat 29, a buoyancy plate 32 is provided at the bottom end of the cross plate 31, and a baffle 33 is vertically provided on the upper right end of the cross plate 31. A separation box 7 is provided on the right outside of the water tank 6, and an oil-water separation mechanism is provided at the upper inner end of the separation box 7. The oil-water separation mechanism includes a mounting plate 34, mounting plates 34 are symmetrically provided on both sides of the upper inner end of the separation box 7, a hydrophilic and oil-repellent membrane 35 is provided in the middle of the mounting plate 34, an oil outlet pipe 36 is provided on the right side of the separation box 7 and close to the upper end of the hydrophilic and oil-repellent membrane 35, and a water outlet pipe 37 is connected to the outside of the right bottom end of the separation box 7.

[0040] A method for using a smoke filter for a kitchen comprises the following steps:

[0041] Step 1: When in use, start the exhaust fan 4, which draws the oil smoke from the bottom of the base frame 2 and sends it into the water tank 6 through the output pipe 5. The grease in the oil smoke floats on the water surface, and the water vapor in the oil smoke dissolves into the water, and the liquid level inside the water tank 6 rises. As the liquid level rises, the grease lifts the buoyancy plate 32, and the buoyancy plate 32 drives the baffle 33 on one side of the cross plate 31 to rise, and at the same time drives the mounting seat 29 to compress the spring 30 until the top of the baffle 33 abuts against the right corner inside the water tank 6, so that the grease on the water surface enters the separation box 7 from the overflow port 27. As the grease decreases, the spring 30 in a compressed state rebounds to control the cross plate 31 to descend. After the cross plate 31 descends, it drives the baffle 33 to block the overflow port 27 again.

[0042] In step 1, the exhaust fan 4 draws the oil smoke into the water tank 6, and uses water to treat the oil smoke. Since the grease in the oil smoke floats on the water surface, the water vapor merges into the water, and the initial separation of the oil smoke is achieved. This separation method based on physical properties (the density difference between grease and water) is simple and effective, and can quickly remove most of the grease in the oil smoke, reducing the burden of subsequent treatment.

[0043] For example, compared with a conventional range hood that relies solely on a filter to filter grease, this method can handle finer grease particles, because the filter may reduce filtering efficiency due to grease clogging, while the water in the sink 6 can continuously process the fumes without being affected by grease accumulation.

[0044] Step 2: After the grease enters the separation box 7 from the overflow port 27, it is separated for the second time by the hydrophilic oleophobic membrane 35. A small amount of water passes through the hydrophilic oleophobic membrane 35 and falls below the separation box 7 and flows into the water outlet pipe 37, while the grease intercepted by the hydrophilic oleophobic membrane 35 flows into the oil outlet pipe 36 along the right side.

[0045] In step 1, through the overflow mechanism, as the liquid level in the water tank 6 rises, the grease lifts the buoyancy plate 32, driving the baffle 33 to rise, so that the grease enters the separation box 7 from the overflow port 27. When the grease decreases, the spring 30 rebounds to control the baffle 33 to block the overflow port 27 again. This design can accurately control the overflow of grease, ensure that only grease enters the separation box 7, and avoid a large amount of water mixing.

[0046] In the separation box 7, the hydrophilic oleophobic membrane 35 further performs secondary separation on the grease, completely separating the small amount of water mixed in from the grease, so that the recovered grease has a higher purity. This is very beneficial for the recycling of grease. For example, in some small restaurants or households, if the grease can be effectively recycled, it can be used to make products such as soap, thereby improving resource utilization.

[0047] Step 3: When the smoke is sprayed into the water in the water tank 6 through the nozzle 21, the heat in the smoke is absorbed by the water in the water tank 6, and the cold water circulating in the serpentine pipe 25 absorbs the heat and is connected to the external water tank through the second connector 26 for use;

[0048] In step 1, the heat in the flue gas is absorbed by the water in the water tank 6, and the cold water in the serpentine tube 25 absorbs this part of the heat and can be connected to the external water tank for use. The design of the serpentine tube 25 increases the contact area and contact time between the cold water and the hot water, thereby improving the efficiency of heat exchange.

[0049] Compared with traditional kitchen equipment, this heat recovery mechanism can reuse the heat that was originally wasted. For example, the recovered heat can be used to preheat domestic water in the home, reducing the energy consumption of the water heater, thereby achieving the effect of energy saving and emission reduction.

[0050] Step 4, when the number of exhaust vents needs to be adjusted according to the usage of the kitchen stove, the motor 10 at the corresponding position is started, and the motor 10 drives the screw 8 to rotate after starting, and the screw 8 drives the movable block 11 to move horizontally after rotating, and the movable block 11 drives the top block 12 to move synchronously after moving horizontally, and when the top block 12 moves to the bottom of the movable column 14 at the corresponding position, it is lifted up, and after the movable column 14 is lifted up, the exhaust port 15 at its upper end is exposed from the upper end of the air inlet pipe 13, so that the smoke can enter the air path 17 from the air inlet 16, and then enter the bellows 1 through the exhaust port 15;

[0051] Step five, when it is necessary to close the exhaust port at this position, the motor 10 controls the top block 12 to move away from the bottom of the movable column 14. At this time, the counterweight block 19 at the top of the movable column 14 falls due to gravity, so that the exhaust port 15 at the upper end of the movable column 14 is blocked by the air inlet pipe 13.

[0052] In step 4 and step 5, the motor 10 drives the screw 8 to rotate, thereby controlling the movement of the movable block 11 and the top block 12 to open and close the air outlet. This design can accurately adjust the number of air outlets according to the usage of the kitchen stove.

[0053] For example, when only one stove is used, other unnecessary exhaust vents can be closed, which can reduce the power consumption of the exhaust fan 4 and improve the local exhaust effect, making the exhaust more concentrated above the stove in use, thereby improving the flexibility and adaptability of the entire smoke filtration system.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fume filter for a kitchen, characterized in that: include A bellows (1), a base frame (2) being fixedly mounted at the bottom end of the bellows (1), a position adjustment mechanism being arranged inside the base frame (2), and an opening and closing mechanism being arranged between the bellows (1) and the base frame (2); A case (3), the case (3) being arranged outside one side of the wind box (1), an exhaust fan (4) being arranged inside the case (3), an air inlet end of the exhaust fan (4) being connected to the wind box (1), and an air outlet end of the exhaust fan (4) being connected to a water tank (6) via an output pipe (5); An overflow mechanism is provided at the upper right end of the water tank (6), a separation box (7) is provided outside the right side of the water tank (6), and an oil-water separation mechanism is provided at the upper inner end of the separation box (7).

2. A smoke filter for kitchen according to claim 1, characterized in that: The position adjustment mechanism comprises a screw rod (8), a plurality of screw rods (8) are arranged side by side at the lower part of the base frame (2), a housing (9) is arranged on the left side outside the bottom end of the base frame (2), motors (10) equal in number to the screw rods (8) are arranged side by side inside the housing (9), the output shafts of the motors (10) are fixedly connected to the screw rods (8), a movable block (11) is movably installed outside the screw rod (8), a top block (12) is arranged at the top end of the movable block (11), corrugated rubber sleeves (20) are arranged on both sides of the top block (12) and the base frame (2) and outside the screw rod (8), and a guide groove (38) matching the top block (12) is arranged at the upper end of the base frame (2).

3. A smoke filter for kitchen according to claim 2, characterized in that: The opening and closing mechanism comprises an air inlet pipe (13), a plurality of air inlet pipes (13) are arranged side by side at the lower part of the wind box (1), a movable column (14) is movably sleeved inside the air inlet pipe (13), exhaust ports (15) are provided on both sides of the upper end of the movable column (14), air inlet ports (16) are provided on both sides of the lower end of the movable column (14), and an air path (17) connected to the exhaust port (15) and the air inlet port (16) is provided in the middle of the inner side of the movable column (14).

4. A smoke filter for kitchen according to claim 3, characterized in that: The end surfaces of the top block (12) and the movable column (14) on the same side are both arc-shaped structures.

5. A smoke filter for kitchen according to claim 4, characterized in that: Limiting blocks (18) are provided at the upper ends of both sides of the movable column (14), and a counterweight block (19) is fixedly installed at the middle of the top end of the movable column (14).

6. A smoke filter for kitchen according to claim 1, characterized in that: A nozzle (21) is also provided in the middle of the inner side of the water tank (6), and the top end of the nozzle (21) is connected to the output pipe (5) through a joint 1 (22). A water supply pipe (23) and a drainage pipe (24) are respectively provided at the upper and lower ends of the middle of the front side of the water tank (6).

7. A smoke filter for kitchen according to claim 1, characterized in that: A serpentine tube (25) is further provided at the lower part of the water tank (6), and two joints (26) connected to the serpentine tube (25) are provided at the lower two ends of the front side of the water tank (6).

8. A smoke filter for kitchen according to claim 7, characterized in that: The overflow mechanism comprises an overflow port (27), the overflow port (27) is opened between the water tank (6) and the upper end of the separation box (7), a suspension rod (28) is vertically arranged at the upper right end inside the water tank (6), a mounting seat (29) is movably installed outside the suspension rod (28), a spring (30) is arranged between the mounting seat (29) and the upper end of the water tank (6) and located outside the suspension rod (28), a transverse plate (31) is horizontally arranged on the right side of the mounting seat (29), a buoyancy plate (32) is arranged at the bottom end of the transverse plate (31), and a baffle (33) is vertically arranged at the upper right end of the transverse plate (31).

9. A smoke filter for kitchen according to claim 7, characterized in that: The oil-water separation mechanism comprises a mounting plate (34), the mounting plates (34) are symmetrically arranged on both sides of the inner upper end of the separation box (7), a hydrophilic and oleophobic membrane (35) is arranged in the middle of the mounting plate (34), an oil outlet pipe (36) is arranged on the right side of the separation box (7) and close to the upper end of the hydrophilic and oleophobic membrane (35), and a water outlet pipe (37) is connected to the outside of the right bottom end of the separation box (7).

10. The method for using a smoke filter for a kitchen according to claim 1, characterized in that: The following steps are involved: Step 1: When in use, start the exhaust fan (4), the exhaust fan (4) draws the oil smoke from the bottom of the base frame (2) and sends it into the water tank (6) through the output pipe (5). The grease in the oil smoke floats on the water surface, and the water vapor in the oil smoke dissolves into the water, and the liquid level inside the water tank (6) rises. As the liquid level rises, the grease lifts the buoyancy plate (32), and the buoyancy plate (32) drives the baffle plate (33) on one side of the transverse plate (31) to rise, and at the same time drives the mounting seat (29) to compress the spring (30) until the top of the baffle plate (33) abuts against the right corner inside the water tank (6). In this way, the grease on the water surface enters the separation box (7) from the overflow port (27). As the grease decreases, the spring (30) in a compressed state rebounds to control the transverse plate (31) to descend. After the transverse plate (31) descends, it drives the baffle plate (33) to block the overflow port (27) again. Step 2: After the grease enters the separation box (7) from the overflow port (27), it is separated for the second time by the hydrophilic oleophobic membrane (35), wherein a small amount of water passes through the hydrophilic oleophobic membrane (35) and falls to the lower part of the separation box (7) and flows into the water outlet pipe (37), while the grease intercepted by the hydrophilic oleophobic membrane (35) flows into the oil outlet pipe (36) along the right side; Step 3: When the smoke is sprayed into the water in the water tank (6) through the nozzle (21), the heat in the smoke is absorbed by the water in the water tank (6), and the cold water circulating in the serpentine tube (25) absorbs the heat and is connected to the external water tank through the second connector (26) for use; Step 4, when the number of exhaust ports needs to be adjusted according to the usage of the kitchen stove, the motor (10) at the corresponding position is started, and after the motor (10) is started, the screw rod (8) is driven to rotate, and after the screw rod (8) rotates, the movable block (11) is driven to move horizontally, and after the movable block (11) moves horizontally, the top block (12) is driven to move synchronously, and when the top block (12) moves to the bottom of the movable column (14) at the corresponding position, it is lifted, and after the movable column (14) is lifted, the exhaust port (15) at its upper end is exposed from the upper end of the air inlet pipe (13), so that the smoke can enter the air path (17) from the air inlet (16), and then enter the bellows (1) through the exhaust port (15); Step 5, when it is necessary to close the exhaust port at this position, the motor (10) controls the top block (12) to move away from the bottom of the movable column (14), and the counterweight block (19) at the top of the movable column (14) falls due to gravity, so that the exhaust port (15) at the upper end of the movable column (14) is blocked by the air inlet pipe (13).

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