Range hood

Abstract

The utility model discloses a range hood which comprises an oil throwing and filtering assembly used for separating and filtering oil fume, a purifying assembly used for purifying the oil fume, a foam removing assembly used for removing water vapor and foam and a fan used for providing power, and the oil throwing and filtering assembly, the fan, the purifying assembly and the foam removing assembly are sequentially connected. The oil throwing filtering assembly is connected with an air inlet, and the foam removing assembly is connected with an air outlet. The range hood disclosed by the utility model achieves the emission standard by filtering and purifying oil fume, and avoids environmental pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a range hood. Background Art

[0002] A lot of oil smoke is produced during the cooking process. Modern medicine has proven that oil smoke is not only harmful to the human body, but also causes air pollution when discharged into the atmosphere. Currently, the most common range hoods are composed of exhaust hoods, smoke pipes, wall-mounted chimneys, and high-speed fans installed on the roof. When the range hood is working, the high-speed fan generates negative pressure, and the oil smoke is sucked into the exhaust hood and discharged directly into the atmosphere through the wall-mounted chimney after simple filtration, which not only seriously pollutes the air, but also causes oil stains to contaminate walls, floors, etc. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the utility model provides a range hood that filters and purifies the oil smoke to meet the emission standards and avoid polluting the environment.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A range hood comprises: an oil-spinning filter assembly for separating and filtering oil fumes, a purification assembly for purifying oil fumes, a defoaming assembly for removing water vapor and foam, and a fan for providing power. The oil-spinning filter assembly, the fan, the purification assembly and the defoaming assembly are connected in sequence, and the oil-spinning filter assembly is connected to an air inlet, and the defoaming assembly is connected to an air outlet.

[0006] Furthermore, the oil-spinning filter assembly includes a shell, an oil-spinning plate and at least one filter box arranged in the shell. The shell is provided with a first inlet and a first outlet. The oil smoke passes through the oil-spinning plate and the filter box in sequence through the first inlet and is blown toward the purification assembly from the first outlet.

[0007] Furthermore, the purification component includes a purification box for storing oil fume treatment liquid, the purification box is provided with a second inlet for oil fume to enter and a second outlet for oil fume to discharge, and a vibration component is provided in the purification box above the oil fume treatment liquid. The oil fume enters the purification box through the second inlet and contacts with the oil fume treatment liquid to generate foam, and the vibration component increases the amount of foam by vibration to increase the contact area between the oil fume and the foam.

[0008] Furthermore, the vibration assembly includes a carrying box and a plurality of vibration balls. The plurality of vibration balls are vibratingly arranged in the carrying box, and the plurality of vibration balls vibrate when being blown by the oil smoke.

[0009] Furthermore, the supporting box includes a box body and a cover plate. The box body is a hollow structure with an opening facing upward. The bottom plate of the box body is provided with a plurality of through holes. A plurality of vibration balls can be vibratedly arranged in the box body. The cover plate is arranged on the box body to prevent the plurality of vibration balls from vibrating out of the box body. The cover plate is provided with a plurality of through holes.

[0010] Furthermore, a defoaming member is provided in the purification box corresponding to the second outlet, and the defoaming member includes a plurality of blades, and the plurality of blades are laterally spaced and inclined.

[0011] Furthermore, the blade includes an upper inclined section, a lower inclined section and a connecting section, the upper inclined section and the lower inclined section are connected by the connecting section, and the angle between the upper inclined section and the connecting section and the angle between the lower inclined section and the connecting section do not exceed 90°.

[0012] Furthermore, the purification component also includes a circulation loop, the liquid inlet end of the circulation loop is connected to the bottom of the purification box, and the liquid outlet end of the circulation loop is connected to the top of the purification box through a spray head, and the spray head faces the vibration component.

[0013] Furthermore, the defoaming component includes a box body, in which a defoaming disc and a spray head are arranged. The defoaming disc can rotate to remove foam by centrifugal force. The spray head is used to spray the inside of the box body and recover the spray liquid through a recovery pipe.

[0014] Furthermore, the nozzle is connected to the purification box to extract the oil fume treatment liquid, and the box body is connected to the purification box via a recovery pipe.

[0015] The beneficial effects of the range hood provided by the utility model are as follows:

[0016] The oil fume is separated and the particles in the fume are filtered through the oil-spinning filter component, and the particles and oil in the fume are purified and absorbed through the purification component, and then the water vapor and foam carried by the wind are removed through the foam removal component, so that the fume meets the emission standards after treatment. The range hood will not discharge the fume directly into the air, but will filter and purify the fume to meet the emission standards before discharging it to avoid polluting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the range hood of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the range hood of the utility model from a rear view angle;

[0019] Figure 3 This is a schematic diagram of the structure of the range hood of the utility model after removing the casing;

[0020] Figure 4 This is a schematic diagram of the structure of the range hood of the utility model when the housing is removed and viewed from a rear angle;

[0021] Figure 5 It is a schematic diagram of the main internal structure of the range hood of the utility model;

[0022] Figure 6 It is a schematic diagram of the main internal structure of the range hood of the utility model from a rear view angle;

[0023] Figure 7 It is a schematic diagram of the connection structure of the purification component and the defoaming component of the utility model;

[0024] Figure 8 It is a cross-sectional view of the purification component of the utility model;

[0025] Fig. 9 It is an exploded view of the foam removal component of the utility model;

[0026] Fig.10 It is a cross-sectional view of the purification component of the utility model from another perspective.

[0027] The meanings of the reference numerals are as follows:

[0028] 1. Casing; 11. Air inlet; 12. Air outlet; 13. Discharge outlet; 14. Water inlet; 15. Display panel; 16. Operation button; 17. Emergency switch; 18. Universal wheel; 19. Heat dissipation outlet; 2. Oil-spinning filter assembly; 21. Casing; 22. Oil-spinning tray; 23. Filter box; 24. First inlet; 25. First outlet; 26. First discharge outlet; 3. Purification assembly; 31. Purification box; 32. Second inlet; 33. Second outlet; 34. Second discharge outlet; 35. Circulation loop; 36. Sprinkler head; 37. Vibration assembly; 371 , through hole; 372, carrier box; 3721, box body; 3722, cover plate; 3723, through hole; 38, defoaming part; 381, blade; 3811, upper inclined section; 3812, lower inclined section; 3813, connecting section; 4, defoaming component; 41, box body; 42, defoaming disc; 43, third inlet; 44, third outlet; 45, recovery pipe; 5, fan; 61, pipeline; 62, smoke inlet pipe; 63, smoke outlet pipe; 7, discharge pipeline; 8, purifier box; 81, purifier addition port; 9, water inlet pipeline; 10, control module. DETAILED DESCRIPTION

[0029] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] See also Figure 1-10 The utility model provides a range hood, which includes an oil-spinning filter assembly 2 for separating and filtering oil smoke, a purification assembly 3 for purifying oil smoke, a defoaming assembly 4 for removing water vapor and foam, and a fan 5 for providing power. The oil-spinning filter assembly 2, the fan 5, the purification assembly 3 and the defoaming assembly 4 are connected in sequence, and the oil-spinning filter assembly 2 is connected to an air inlet 11, and the defoaming assembly 4 is connected to an air outlet 12. The range hood of the utility model filters and purifies oil smoke to meet emission standards and avoid polluting the environment.

[0033] Specifically, the range hood also includes a casing 1, an air inlet 11 and an air outlet 12 are arranged in the casing 1, an oil-spinning filter component 2 for separating and filtering oil fumes, a purification component 3 for purifying oil fumes, a defoaming component 4 for removing water vapor and foam, and a fan 5 for providing power are all arranged in the casing 1, the oil-spinning filter component 2, the fan 5, the purification component 3 and the defoaming component 4 are connected in sequence through a pipeline 61, and the oil-spinning filter component 2 is connected to the air inlet 11 through a smoke inlet pipe 62, and the defoaming component 4 is connected to the air outlet 12 through a smoke outlet pipe 63.

[0034] Therefore, the range hood of the utility model separates the oil smoke and filters the particles in the oil smoke through the oil-spinning filter component 2, and then purifies and absorbs the particles and oil in the oil smoke through the purification component 3, and then removes the water vapor and foam carried by the wind through the foam removal component 4, so that the oil smoke meets the emission standards after treatment. The range hood will not discharge the oil smoke directly into the air, but will filter and purify the oil smoke to meet the emission standards before discharging it, so as to avoid polluting the environment.

[0035] The range hood of the present invention also includes a control module 10, and the oil-spinning filter component 2, the purification component 3, the foam removal component 4 and the fan 5 are all electrically connected to the control module 10, so that the start-up and shutdown of the range hood and the operation of the purification lamp are controlled by the control module 10, thereby realizing intelligent oil fume treatment.

[0036] The oil-spinning filter assembly 2 includes two processes, the first process is to separate the oil smoke, and the second process is to preliminarily filter the particulate matter in the oil smoke. Specifically, the oil-spinning filter assembly 2 includes a housing 21, an oil-spinning plate 22 and at least one filter box 23 arranged in the housing 21, and the housing 21 is provided with a first inlet 24 and a first outlet 25. The oil smoke passes through the oil-spinning plate 22 and the filter box 23 in sequence through the first inlet 24 and is blown to the purification assembly 3 from the first outlet 25.

[0037] Specifically, the first inlet 24 is provided corresponding to the oil-slinging plate 22, and the first inlet 24 is connected to the air inlet 11 through the pipe 61 and the smoke inlet pipe 62, and the first outlet 25 is provided corresponding to the filter box 23, and the first outlet 25 is connected to the fan 5 through the pipe 61. The fan 5 is started to form a negative pressure and extract the oil smoke generated by cooking from the air inlet 11 into the housing 21, and the oil smoke is first separated by the centrifugal force of the oil-slinging plate 22 in the housing 21, and then the particulate matter in the oil smoke is preliminarily filtered by the filter box 23. Since the fan 5 provides the power for the oil smoke to flow, the housing 1 is provided with a heat dissipation port 19 corresponding to the fan 5 to dissipate the heat of the working fan 5 to prevent the fan 5 from being overheated and affecting its life.

[0038] In the present invention, the number of filter boxes 23 is set according to the requirements for fume treatment. Since the fume components generated by cooking different dishes are different, the content of polluting particles and oil in the fume is also different, resulting in different requirements for filtering and purification. The number of filter boxes 23 is determined according to the specific application scenario and is not specifically limited here. The filter box 23 is provided with filter cotton, filter paper, etc. with adsorption and filtration functions to preliminarily adsorb and intercept particles in the fume.

[0039] The casing 1 is provided with a discharge port 13, and the bottom of the housing 21 is provided with a first discharge port 26 corresponding to the oil-spinning pan 22, and the first discharge port 26 is connected to the discharge port 13 through a discharge pipe 7. After the oil-spinning pan 22 rotates to separate the oil smoke, the separated oil dirt is discharged from the casing 1 from the discharge port 13 through the first discharge port 26 and the discharge pipe 7. The discharged oil dirt can be collected and processed uniformly.

[0040] The oil smoke separated and filtered is blown to the purification component 3 through the pipe 61 by the suction force of the fan 5. The purification component 3 includes a purification box 31 for storing the oil smoke treatment liquid, the purification box 31 is provided with a second inlet 32 ​​for the oil smoke to enter and a second outlet 33 for the oil smoke to be discharged, and a vibration component 37 is provided above the oil smoke treatment liquid in the purification box 31. The oil smoke enters the purification box 31 through the second inlet 32 ​​and contacts with the oil smoke treatment liquid to generate foam. The vibration component 37 increases the amount of foam by vibration to increase the contact area between the oil smoke and the foam.

[0041] Specifically, the lower part of the purification box 31 is filled with oil fume treatment liquid, the second inlet 32 ​​is set corresponding to the oil fume treatment liquid, the pipeline 61 extends into the purification box 31 through the second inlet 32 ​​and faces the bottom of the purification box 31, and the second outlet 33 is set at the upper part of the purification box 31 and above the vibration component 37. The second inlet 32 ​​is set at the lower part of the purification box 31 and corresponds to the oil fume treatment liquid, so that the oil fume discharged into the purification box 31 can be absorbed and purified by the oil fume treatment liquid. The oil fume outlet of the pipeline 61 faces the bottom of the purification box 31, and the oil fume after oil fume separation and preliminary filtration is discharged from the pipeline 61 into the purification box 31, first flows toward the bottom of the purification box 31, and then flows upward and is discharged from the second outlet 33 to the defoaming component 4, so that the oil fume can be fully absorbed and purified by the oil fume treatment liquid, thereby improving the oil fume purification efficiency.

[0042] In addition, the purification component 3 sets a fume treatment liquid in the purification box 31, and sets a vibration component 37 above the fume treatment liquid. The fume entering the purification box 31 first contacts the fume treatment liquid located at the lower part of the purification box 31 to generate foam, and then carries the foam and blows upward to the vibration component 37 to make the vibration component 37 vibrate repeatedly to increase the amount of foam, thereby increasing the contact area between the fume and the foam, making the contact between the fume and the fume treatment liquid more complete, and then the fume is effectively purified through mutual inertial collision, retention, diffusion of fine particles and mutual coagulation to meet the emission standards, thereby avoiding environmental pollution.

[0043] In the utility model, the oil fume treatment liquid is intelligently prepared by the control module 10, and is prepared for use before the oil fume purification. Specifically, a purifier box 8 containing a purifier is provided in the housing 1, and the purifier box 8 is connected to the purifier box 31. The housing 1 is provided with a water inlet 14, and the water inlet 14 is connected to the purifier box 31 through a water inlet pipe 9. A second discharge port 34 is provided at the bottom of the purifier box 31, and the second discharge port 34 is connected to the discharge port 13 through a discharge pipe 7. Water enters the purifier box 31 through the water inlet 14 and the water inlet pipe 9, and the purifier is introduced into the purifier box 31 from the purifier box 8. The operator sets the ratio of the purifier and water, and intelligently controls the amount of water and purifier introduced into the purifier box 31 through the control module 10 to ensure the accurate ratio of the purifier and water. The purifier box 8 is also provided with a purifier addition port 81, so as to replenish the purifier into the purifier box 8 through the purifier addition port 81.

[0044] After the oil fume treatment liquid has absorbed and purified the oil fume for a long time and many times, it will contain a large amount of impurities, and its absorption and purification capacity will be reduced. It needs to be discharged from the purification box 31 to replace the new oil fume treatment liquid. The second discharge port 34 is used to discharge the oil fume treatment liquid that has absorbed and purified the oil fume for a long time and many times. The second discharge port 34 is provided with a valve, and the valve is electrically connected to the control module 10. During the operation of the purification component 3, the control module 10 controls the valve to be closed. When the oil fume treatment liquid that has absorbed and purified the oil fume for a long time and many times needs to be discharged, the control module 10 controls the valve to be opened.

[0045] The purification component 3 further includes a circulation loop 35, the liquid inlet end of the circulation loop 35 is connected to the bottom of the purification box 31, and the liquid outlet end of the circulation loop 35 is connected to the top of the purification box 31 through the spray head 36 and faces the vibration component 37. The circulation loop 35 is arranged outside the purification box 31, and provides power for the circulation of the oil fume treatment liquid by driving the pump. The oil fume treatment liquid flows out from the bottom of the purification box 31 to the circulation loop 35, and then is sprayed back into the purification box 31 from the top of the purification box 31 through the circulation loop 35 through the spray head 36. The oil fume flowing to the bottom of the purification box 31 through the second inlet 32 ​​first contacts the oil fume treatment liquid located at the bottom of the purification box 31 to generate foam, and then carries the foam and blows upward to the vibration component 37 to make the vibration component 37 vibrate repeatedly to increase the amount of foam, thereby increasing the contact area between the oil fume and the foam, so that the oil fume and the oil fume treatment liquid contact more fully. At the same time, the oil fume treatment liquid flowing back from the top of the purification box 31 impacts the vibration component 37 again, increasing the amplitude of the vibration of the vibration component 37, thereby increasing the amount of foam generated, making the contact between the oil fume and the purifier more complete. In addition, the oil fume treatment liquid flowing back from the top of the purification box 31 can also impact, absorb, and purify the oil fume again, and then discharge the oil fume from the second outlet 33. The oil fume is absorbed and purified twice by the oil fume treatment liquid in the purification box 31, and the vibration of the vibration component 37 increases the contact area between the oil fume and the purifier, further improving the oil fume purification efficiency.

[0046] In the present invention, the vibration assembly 37 includes a carrier box 372 and a plurality of vibration balls (not shown in the figure). The carrier box 372 is provided with a plurality of through holes 371 therethrough. The plurality of vibration balls are vibratingly arranged in the carrier box 372. The plurality of vibration balls vibrate when the oil smoke blows. Considering the cost, the vibration balls of the present invention can be plastic balls.

[0047] Specifically, the carrying box 372 includes a box body 3721 and a cover plate 3722. The box body 3721 is a cavity structure with an opening facing upward. The bottom plate of the box body 3721 is provided with a plurality of through holes 371, and a plurality of vibration balls are vibratingly arranged in the box body 3721. The cover plate 3722 is provided on the box body 3721 to prevent the plurality of vibration balls from vibrating out of the box body 3721. The cover plate 3722 is provided with a plurality of through holes 3723. Thus, by providing a plurality of vibration balls in the box body 3721 and covering the cover plate 3722, the vibration of the vibration balls can be limited to prevent the vibration balls from being separated from the box body 3721 and affecting the vibration effect, thereby affecting the foam generation effect. The through holes 3723 facilitate the passage of the fume carrying the fume treatment liquid and the foam, and the collision of the vibration balls with the cover plate 3722 can further increase the foam production.

[0048] Since the oil fume carrying the oil fume treatment liquid and the foam will generate a large amount of foam after passing through the vibration component 37, if it is discharged directly, it will pollute the environment. Therefore, a defoaming member 38 is provided in the purification box 31 corresponding to the second outlet 33, and the defoaming member 38 includes a plurality of blades 381, and the plurality of blades 381 are arranged at intervals and tilted in the horizontal direction. When the oil fume carrying the oil fume treatment liquid and a large amount of foam passes between two adjacent blades 381, it will hit the inclined blades 381 to remove part of the foam, thereby reducing the pressure of removing the foam in the subsequent process.

[0049] In this embodiment, the blade 381 includes an upper inclined section 3811, a lower inclined section 3812 and a connecting section 3813. The upper inclined section 3811 and the lower inclined section 3812 are connected by the connecting section 3813. The angle between the upper inclined section 3811 and the connecting section 3813 and the angle between the lower inclined section 3812 and the connecting section 3813 are both less than 90°. That is, the angle between the upper inclined section 3811 and the connecting section 3813 is an acute angle or a right angle, and the angle between the lower inclined section 3812 and the connecting section 3813 is also an acute angle or a right angle. When the oil smoke carries the oil smoke treatment liquid and a large amount of foam through the defoaming member 38, it will experience multiple collisions, and the foam removal effect is better.

[0050] The oil smoke absorbed and purified by the purification component 3 will be discharged from the purification box 31 with water vapor and foam that need to be removed. The defoaming component 4 includes a box body 41, and a defoaming disc 42 and a spray head are arranged in the box body 41. The defoaming disc 42 can rotate to remove foam by centrifugal force. The spray head is used to spray the inner wall of the box body 41 and recover the spray liquid through the recovery pipe 45. The spray head is connected to the purification box 31 to extract the oil smoke treatment liquid, and the box body 41 is connected to the purification box 31 through the recovery pipe 45.

[0051] Specifically, the box body 41 is provided with a third inlet 43 and a third outlet 44, the third inlet 43 is connected to the second outlet 33 through a pipeline 61, and the third outlet 44 is connected to the air outlet 12 through a smoke outlet pipe 63. The liquid outlet end of the circulation loop 35 is also connected to the box body 41 through a nozzle, and the bottom of the box body 41 is connected to the purification box 31 through a recovery pipe 45. The oil fume absorbed and purified by the purification component 3 is discharged from the purification box 31 and flows into the box body 41 through the pipeline 61. The centrifugal force generated by the rotation of the foam disk 42 in the box body 41 will separate the foam and water vapor from the purified oil fume. The oil fume treatment liquid circulating through the circulation loop 35 is sprayed into the box body 41 to impact and disperse the separated foam and water vapor to the bottom of the box body 41, and flows into the purification box 31 through the recovery pipe 45 for accumulation. After the oil fume purification is completed, the oil fume treatment liquid, foam, etc. that have absorbed and purified the oil fume for a long time and multiple times are discharged out of the casing 1 through the discharge port 13 through the recovery pipe 45 at the bottom of the purification box 31.

[0052] Therefore, after the range hood of the utility model sucks the oil fume through negative pressure, the oil fume is first separated by the oil-spinning tray 22, and then preliminarily filtered by the filter box 23, and then efficiently absorbed and purified by vibration in the purification component 3 to complete the effective purification of the oil fume, and then the water vapor and foam carried by the wind are removed by the defoaming component 3, and the oil fume that meets the emission standards is discharged from the air outlet 12 to avoid polluting the environment.

[0053] The above components and operation processes of the range hood of the utility model are all completed by intelligent control of the control module 10 after programming. In order to facilitate user operation, the housing 1 is equipped with a display panel 15 and an operation button 16 electrically connected to the control module 10, so that the user can set the working program of the range hood and start and shut down the range hood, etc. In addition, the range hood is also equipped with an emergency switch 17 to shut down the range hood in an emergency to avoid damage to the range hood.

[0054] In addition, universal wheels 18 are installed at the bottom of the range hood to facilitate the adjustment of the position of the mobile range hood at any time according to the installation space, and the range hood is not limited to being installed on the wall, which increases the flexibility of the range hood installation.

[0055] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A range hood, characterized in that: include: An oil-spinning filter component for separating and filtering oil fumes, a purification component for purifying oil fumes, a defoaming component for removing water vapor and foam, and a fan for providing power, the oil-spinning filter component, the fan, the purification component and the defoaming component are connected in sequence, and the oil-spinning filter component is connected to an air inlet, and the defoaming component is connected to an air outlet.

2. The range hood according to claim 1, characterized in that: The oil-spinning filter assembly includes a shell, an oil-spinning plate and at least one filter box arranged in the shell. The shell is provided with a first inlet and a first outlet. The oil smoke passes through the oil-spinning plate and the filter box in sequence through the first inlet and is blown toward the purification assembly from the first outlet.

3. The range hood according to claim 1, characterized in that: The purification component includes a purification box for storing oil fume treatment liquid, the purification box is provided with a second inlet for oil fume to enter and a second outlet for oil fume to discharge, a vibration component is provided in the purification box above the oil fume treatment liquid, the oil fume enters the purification box through the second inlet and contacts with the oil fume treatment liquid to generate foam, and the vibration component increases the amount of the foam by vibration to increase the contact area between the oil fume and the foam.

4. The range hood according to claim 3, characterized in that: The vibration assembly comprises a carrying box and a plurality of vibration balls. The plurality of vibration balls are vibratingly arranged in the carrying box, and the plurality of vibration balls are vibrated by being blown by the oil smoke.

5. The range hood according to claim 4, characterized in that: The supporting box includes a box body and a cover plate. The box body is a cavity structure with an opening upward. The bottom plate of the box body is provided with a plurality of through holes. A plurality of vibration balls are vibratingly arranged in the box body. The cover plate is arranged on the box body to prevent the plurality of vibration balls from vibrating out of the box body. The cover plate is provided with a plurality of through holes.

6. The range hood according to claim 3, characterized in that: A defoaming component is provided in the purification box corresponding to the second outlet. The defoaming component includes a plurality of blades. The plurality of blades are laterally spaced and inclined.

7. The range hood according to claim 6, characterized in that: The blade comprises an upper inclined section, a lower inclined section and a connecting section, wherein the upper inclined section and the lower inclined section are connected via the connecting section, and the angle between the upper inclined section and the connecting section and the angle between the lower inclined section and the connecting section do not exceed 90°.

8. The range hood according to claim 3, characterized in that: The purification component also includes a circulation loop, the liquid inlet end of the circulation loop is connected to the bottom of the purification box, the liquid outlet end of the circulation loop is connected to the top of the purification box through a spray head, and the spray head faces the vibration component.

9. The range hood according to claim 3, characterized in that: The defoaming assembly comprises a box body, in which a defoaming disc and a spray head are arranged. The defoaming disc can rotate to remove foam by centrifugal force, and the spray head is used to spray the inside of the box body and recover the spray liquid through a recovery pipe.

10. The range hood according to claim 9, characterized in that: The nozzle is connected to the purification box to extract the oil fume treatment liquid, and the box body is connected to the purification box via the recovery pipe.

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