A range hood

Abstract

The application discloses an oil fume extractor, which comprises a shell, a wind channel formed in the shell, a fan arranged in the wind channel, and a spraying device rotatably arranged in the wind channel and in transmission connection with the fan, and is used for driving the spraying device to rotate when the fan rotates. The spraying device is rotatably arranged in the wind channel and in transmission connection with the fan. When the fan rotates, the spraying device is driven to form a rotating water curtain. When the fan discharges the generated oil fume, the rotating water curtain fully contacts with the generated oil fume, so that the oil particles in the oil fume are melted into water to form a water-oil mixture, the oil in the oil fume is reduced, the oil fume separation effect of the oil fume extractor is improved, the quality of the discharged oil fume is improved, the oil stains in the oil fume are prevented from adhering to the fan, the service life of the fan is prolonged, and the practicability of the oil fume extractor is improved.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, specifically, it relates to a range hood. Background Technology

[0002] As people's living standards improve, cooking in the kitchen often produces a lot of oil fumes, reducing their quality of life. The advent of range hoods has largely solved this problem. However, ordinary range hoods filter oil fumes through an oil filter, separating them and storing the oil in an oil cup. Over time, this separation becomes insufficient, causing the fan to accumulate a large amount of grease, affecting its performance and lifespan. Furthermore, when the fan and casing are heavily greased, professional cleaning is required, increasing maintenance costs and causing environmental pollution. Although existing range hoods have filtration and purification functions, they still store grease inside the hood via an oil collection device. This requires timely cleaning of the oil collection device after prolonged operation, and the presence of oil also increases the risk of fire.

[0003] Chinese Patent Application No. CN112902259A discloses a range hood and its control method. The range hood includes a smoke collection hood, a connecting base, and a cylindrical body. A fan assembly is installed in the cylindrical body, and a spray device is installed in the cylindrical body below the fan assembly. The spray device includes a sleeve, a guide member, a second filter screen, and a spray pipe. The lower end of the sleeve's peripheral wall has an inwardly extending and integrally connected liquid collection tank, which is connected to a first pipe joint. The guide member is a hollow cone that is larger in the middle and smaller at the top and bottom. The guide member passes through four... The support is mounted in the sleeve, and the inner edge of the liquid collection tank is in the vertical projection of the guide. The second filter screen is fixed on the top of the guide. The spray pipe is arranged between the guide and the second filter screen and connected end to end. Multiple atomizing nozzles are installed on the spray pipe. The spray pipe is connected to a second pipe joint. It has the advantages of simple structure, good oil-gas separation effect and high quality of exhaust gas. Although it can achieve oil-fume separation, the use of atomizing nozzles can easily cause water mist to be directly discharged from the air duct with the oil fumes, resulting in poor separation effect.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art and provide a range hood that, by setting a rotatable spray device in the air duct and driving it to the fan, causes the spray device to rotate when the fan rotates, forming a rotating water curtain. When the fumes pass through, the spray device fully contacts the generated fumes, causing the oil particles in the fumes to dissolve into the water, forming a water-oil mixture. This reduces the oil in the fumes, improves the oil-fume separation effect of the range hood, improves the quality of the emitted fumes, and at the same time prevents oil stains from contaminating the fan, extending the service life of the fan and increasing the practicality of the range hood.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is to provide a range hood, including a housing, an air duct formed inside the housing, and a fan disposed in the air duct for exhausting oil fumes from the room.

[0007] The spraying device is rotatably installed inside the air duct and is connected to the fan drive, so that the spraying device can be rotated when the fan rotates.

[0008] Furthermore, the fan includes a fan shaft, which is coaxially arranged within the air duct;

[0009] The spraying device includes a first spraying section, which includes a spraying shaft. One end of the spraying shaft is connected to the fan shaft, and the other end is rotatably connected to a water inlet pipe for water intake.

[0010] Furthermore, a cavity is provided at the other end of the spray shaft, and a bearing is provided in the cavity. The water inlet pipe can pass through the bearing and extend into the cavity.

[0011] The first spray section includes a first nozzle connected to the outer peripheral wall of the spray shaft, and the first nozzle communicates with the outer peripheral wall of the cavity;

[0012] The first nozzle is spaced on the outer peripheral wall of the cavity.

[0013] Furthermore, it also includes a flow guiding device, which is disposed in the air duct and located below the spray device to guide the water sprayed by the spray device to flow downward.

[0014] The air duct has an air inlet and an air outlet. The fan is located near the air outlet, the flow guiding device is located near the air inlet, and the first spray section is located between the fan and the flow guiding device.

[0015] Furthermore, the flow guiding device includes,

[0016] The first guide section is disposed inside the air duct, with one end connected to the inner wall of the air duct and the other end extending towards the air outlet.

[0017] The outer diameter of the first guide section gradually decreases from one end to the other.

[0018] Furthermore, the first guide section has a smoke inlet channel, which is provided through the first guide section along its extension direction;

[0019] The smoke inlet channel includes a smoke inlet and a smoke outlet. The smoke inlet is located at one end of the first guide section, and the smoke outlet is located at the other end of the first guide section.

[0020] The flow guiding device further includes a second flow guiding part, which is covered above the smoke outlet of the first flow guiding part and connected to the outer wall of the first flow guiding part. The second flow guiding part and the outer wall of the first flow guiding part have a gap to form a smoke outlet channel, which communicates with the smoke outlet.

[0021] Furthermore, the airflow guiding device also includes a baffle plate, which is arranged around the inner peripheral wall of the air duct, with one end connected to the inner peripheral wall of the air duct and the other end extending towards the air inlet.

[0022] Furthermore, the spraying device also includes,

[0023] The second water inlet pipe is fixed at one end inside the air duct;

[0024] The second spray section is connected to the other end of the second water inlet pipe and is arranged in a ring inside the air duct, located below the first spray section.

[0025] The second spray section is located above the flow guiding device.

[0026] Furthermore, the second spray unit includes,

[0027] An annular water inlet cavity, connected to the other end of the second water inlet pipe, is installed inside the air duct;

[0028] The second nozzle is located on the annular water inlet cavity and is connected to the annular water inlet cavity.

[0029] Furthermore, it also includes a filter device, which is disposed in the air duct, connected to the inner peripheral wall of the air duct, and located between the fan and the first spray section;

[0030] The filter device has an opening, and the fan shaft passes through the opening and connects to the first spray section.

[0031] A water collection device is installed inside the air duct and connected to the drain pipe. The water collection device is located below the flow guiding device.

[0032] There is a gap between the outer periphery of the water collection device and the inner peripheral wall of the air duct.

[0033] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0034] (1) The present invention provides a rotatable spray device in the air duct and connects it to the water inlet pipe. When in use, the spray device forms a rotatable water curtain by water inlet, which filters the oil in the oil fume, improves the quality of the emitted oil fume, and reduces environmental pollution.

[0035] (2) By dividing the spray device into a first spray section and a second spray section, the first spray section can rotate to form a rotating water curtain, and the second spray section sprays the guide device. Under the action of the guide device, the water flows along the outer peripheral wall of the guide device and moves towards the air inlet to form a water curtain, thus forming a double water curtain in the air duct, improving the separation effect of oil fumes and the quality of the emitted oil fumes, and increasing the protection of the environment.

[0036] (3) By setting up a filter device and placing it between the spray device and the fan, the water in the rotating water curtain is prevented from being discharged with the oil fumes, thus saving water resources. At the same time, it also plays a filtering role, which can filter out the oil stains that have not been removed, improve the filtering effect of the range hood, and increase the practicality of the device.

[0037] (4) By setting up baffles and water collection devices, the present invention enables the spraying device and the flow guiding device to form a water curtain. The water-oil mixture generated can be completely collected in the water collection device by the baffles and discharged directly through the drain pipe. There is no need to collect oil stains through the oil collection cup, which reduces the need for users to clean the oil collection cup regularly, improves the use effect of the range hood, and enhances the user experience.

[0038] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0039] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0040] Figure 1 This is a schematic diagram of the structure of a range hood according to the present invention;

[0041] Figure 2 This is the present invention. Figure 1 Enlarged view at point C;

[0042] Figure 3 This is a schematic diagram of the structure of the second spray section of the present invention;

[0043] Figure 4 This is a schematic diagram of the connection between the flow guiding device and the housing of the present invention;

[0044] Figure 5 This is the present invention. Figure 4 Top view;

[0045] Figure 6 This is the present invention. Figure 1 Enlarged view of section AA.

[0046] In the diagram: 1. Shell; 11. Air duct; 12. Air inlet; 13. Air outlet; 2. Fan; 21. Fan shaft; 3. Spray device; 31. First spray section; 311. Cavity; 312. First nozzle; 313. Bearing; 314. Sealing ring; 32. Second spray section; 321. Second nozzle; 322. Annular water inlet cavity; 33. Second water inlet pipe; 4. Flow guiding device; 41. First flow guiding section; 411. Smoke inlet channel; 412. Smoke inlet; 413. Smoke outlet; 42. Second flow guiding section; 43. Baffle; 5. Fixing frame; 51. First fixing frame; 52. Second fixing frame; 6. Filter device; 7. Water collection device; 8. Drain pipe; 9. Water inlet pipe.

[0047] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0049] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] like Figures 1 to 6 As shown, the range hood of the present invention includes a housing 1, and an air duct 11 is formed inside the housing 1.

[0052] It also includes a fan 2 and a spray system 3.

[0053] The fan 2 is installed inside the air duct 11 and is used to exhaust oil fumes from the room.

[0054] The spraying device 3 is rotatably installed in the air duct 11 and is connected to the fan 2 for driving the spraying device 3 to rotate when the fan 2 rotates.

[0055] This invention provides a rotatable spray device 3 installed in the air duct 11, which is connected to the fan 2. During use, the fan 2 rotates, driving the spray device 3 to form a rotating water curtain. When the fan 2 discharges the generated oil fumes into the room, the rotating water curtain comes into full contact with the generated oil fumes, causing the oil particles in the oil fumes to dissolve into the water, forming a water-oil mixture. This reduces the oil in the oil fumes, improves the oil-fume separation effect of the range hood, improves the quality of the emitted oil fumes, and at the same time prevents oil stains in the oil fumes from contaminating the fan 2, extending the service life of the fan 2 and increasing the practicality of the range hood.

[0056] Specifically, the air duct 11 has an air inlet 12 and an air outlet 13, the fan 2 is located near the air outlet 13, and the spray device 3 is located below the fan 2.

[0057] By placing the spray device 3 below the fan 2, when the fan 2 draws oil fumes from the air inlet 12 to the air outlet 13, the oil fumes first come into contact with the rotating water curtain formed by the spray device 3. This prevents the oil fumes from contacting the fan 2 first, thus avoiding the oil stains in the oil fumes from adhering to the fan 2, causing pollution or slowing down the operation of the fan 2 after prolonged use. This improves the efficiency of the fan 2 and extends its lifespan.

[0058] Preferably, the fan 2 is a variable frequency fan.

[0059] like Figures 1 to 3 As shown, the fan 2 includes a fan shaft 21, which is coaxially arranged in the air duct 11.

[0060] The spraying device 3 includes a first spraying section 31.

[0061] The first spray unit 31 includes a spray shaft, one end of which is connected to the fan shaft 21, and the other end is rotatably connected to the water inlet pipe 9 for water intake.

[0062] This invention connects one end of the spray shaft of the first spray section 31 to the fan shaft 21 and the other end to the water inlet pipe 9 in a rotatable manner. When the fan 2 rotates, the fan shaft 21 drives the spray shaft of the first spray section 31 to rotate, forming a rotating water curtain. In use, the oil fumes are separated by the rotation, improving the quality of the emitted oil fumes and increasing the effectiveness of the range hood.

[0063] Furthermore, a cavity 311 is provided at the other end of the spray shaft, and a bearing 313 is provided in the cavity 311. The water inlet pipe 9 can pass through the bearing 313 and extend into the cavity 311.

[0064] The first spray section 31 includes a first nozzle 312, which is connected to the outer peripheral wall of the spray shaft, and the first nozzle 312 communicates with the outer peripheral wall of the cavity 311.

[0065] This invention features a cavity 311 within the spray shaft, allowing water to be sprayed out through the cavity. A bearing 313 is installed within the cavity 311, and a water inlet pipe 9 passes through the bearing 313 into the cavity 311, enabling the first spray section 31 to rotate relative to the water inlet pipe 9. A first nozzle 312 is installed on the outer peripheral wall of the spray shaft, allowing water to be sprayed through the first nozzle 312 as it passes through the cavity 311. Driven by the fan shaft 21, the spray shaft rotates relative to the water inlet pipe 9, forming a rotating water curtain. The structure is simple, the water curtain has a wide contact area with the oil fumes, improving the oil removal effect of the equipment and enhancing the user experience.

[0066] The first nozzle 312 may also be configured as a spray arm, which is connected to the outer peripheral wall of the spray shaft, and the spray arm is in communication with the outer peripheral wall of the cavity 311.

[0067] By setting up a spray arm, the spray arm rotates with the spray shaft during use, forming a rotating water curtain. As the fumes pass through, the oil in the fumes can be filtered, improving the fume emission effect and the quality of the fume emissions.

[0068] Specifically, such as Figures 1 to 2 As shown, a cavity 311 is provided on the spray shaft, which is connected to the fan shaft 21, so that the first spray section 31 can rotate with the fan shaft 21. The first nozzle 312 is connected to the outer peripheral wall of the spray shaft and communicates with the outer peripheral wall of the cavity 311. By providing a bearing 313 in the cavity 311, when the incoming water flows into the cavity 311, the first spray section 31 can rotate relative to the water inlet pipe 9 through the bearing 313, forming a rotating water curtain. A sealing ring 314 is also provided in the cavity 311 to seal the cavity 311, preventing the cavity 311 from being unsealed, causing unstable water pressure, and preventing the water flow from forming a rotating water curtain when passing through the first nozzle 312. At the same time, water resources are saved.

[0069] The first spray unit 31 can also be equipped with a separate motor, which will form a rotating water curtain. The user can choose whether to start the first spray unit 31 as needed.

[0070] Furthermore, the first nozzle 312 is spaced apart on the outer peripheral wall of the cavity 311.

[0071] By spaced-aparting the first nozzle 312 or spray arm on the outer peripheral wall of the cavity 311, the spaced-apart arrangement can make the water curtain formed by spraying more uniform during use, improve the oil fume separation effect of the first spray section 31, and increase the quality of air emission.

[0072] Furthermore, it also includes a flow guiding device 4, which is disposed in the air duct 11 and located below the spray device 3 to guide the water sprayed by the spray device 3 to flow downward.

[0073] The air duct 11 has an air inlet 12 and an air outlet 13. The fan 2 is located near the air outlet 13, and the flow guiding device 4 is located near the air inlet 12. The first spray section 31 is located between the fan 2 and the flow guiding device 4.

[0074] This invention improves the oil fume separation effect and the quality of emitted oil fumes by setting a flow guiding device 4 inside the air duct 11 and placing the flow guiding device 4 below the first spray section 31. In use, the spray device 3 is positioned between the flow guiding device 4 and the fan 2, with the flow guiding device 4 located close to the air inlet 12. When the spray device 3 sprays water, it is affected by gravity and first guided by the flow guiding device 4 to flow downwards, forming a water curtain inside the air duct 11. The oil fumes are first separated by the water curtain formed by the flow guiding device 4. The separated oil fumes then undergo a second separation by the rotating spray device 3, thereby improving the oil fume separation effect and the quality of emitted oil fumes, reducing environmental pollution, and increasing the practicality of the range hood.

[0075] Specifically, such as Figures 1 to 5 As shown, during use, the fan 2 discharges oil fumes, and the second spray section 32 sprays water through the guide device 4. Under the action of the guide device 4, the sprayed water forms a water curtain. The oil fumes first pass through the water curtain formed by the second spray section 32 and the guide device 4 to separate the oil fumes. Then, they pass through the rotating water curtain formed by the first spray section 31 for secondary separation, further improving the separation effect, improving the quality of the discharged oil fumes, reducing environmental pollution, and improving the use effect of the equipment.

[0076] Furthermore, the flow guiding device 4 includes a first flow guiding section 41, a second flow guiding section 42, and a baffle 43.

[0077] The first guide section 41 is disposed inside the air duct 11, with a gap between one end and the inner wall of the air duct 11, and the other end extends toward the air outlet 13.

[0078] The outer diameter of the first guide section 41 gradually decreases from one end to the other.

[0079] This invention provides a first guide section 41 with a gap between one end of the first guide section 41 and the inner wall of the air duct 11. This allows the water sprayed by the spraying device 3 to flow from one end of the first guide section 41 to the other, guiding the water to form a water curtain within the air duct 11 to separate the oil fumes. Furthermore, the outer diameter of the first guide section 41 gradually decreases from one end to the other, increasing the area of ​​the water curtain formed by the water flow near the air inlet 12. This ensures that the oil fumes are in full contact with the water curtain, improving the oil fume separation effect and enhancing the user experience.

[0080] Furthermore, the first guide section 41 has a smoke inlet channel 411, which is provided through the first guide section 41 along its extension direction.

[0081] The smoke inlet channel 411 includes a smoke inlet 412 and a smoke outlet 413. The smoke inlet 412 is located at one end of the first guide section 41, and the smoke outlet 413 is located at the other end of the first guide section 41.

[0082] Specifically, such as Figures 1 to 4 As shown, the present invention provides a smoke inlet channel 411 within the first guide section 41, and provides a smoke inlet 412 and a smoke outlet 413. This allows the oil fumes, after passing through the spray device 3 and being sprayed with water to form a water curtain in the first guide section 41, to flow from the smoke inlet channel 411 to the air outlet 13 and be discharged outdoors. The smoke inlet channel 411 is designed to extend along the first guide section 41 and has a conical structure, which allows the sprayed water to better form a water curtain along the guide device 4. This increases the area of ​​the water curtain formed on the outer peripheral wall of the first guide section 41. When the oil fumes enter the first guide section 41, the oil fumes come into more complete contact with the water curtain, improving the oil fume separation effect and enhancing the overall performance.

[0083] The second guide section 42 is disposed above the smoke outlet 413 of the first guide section 41 and is connected to the outer wall of the first guide section 41. The second guide section 42 and the outer wall of the first guide section 41 have a gap to form a smoke outlet channel, which communicates with the smoke outlet 413.

[0084] The baffle 43 is arranged around the inner peripheral wall of the air duct 11, with one end connected to the inner peripheral wall of the air duct 11 and the other end extending toward the air inlet 12.

[0085] The present invention provides a second guide section 42 at one end of the smoke outlet 413 of the first guide section 41 and fixes it on the outer wall of the first guide section 41. There is a gap between the second guide section 42 and the outer wall of the first guide section 41. When the oil fumes pass through the first guide section 41, they are filtered and then exit from the smoke outlet 413 of the first guide section 41. The second guide section 42 diverts the oil fumes, increasing the dispersion area of ​​the filtered oil fumes. This allows the oil fumes to have a larger contact surface when passing through the rotating water curtain formed by the first spray section 31, thereby increasing the separation effect of the oil fumes and improving the emission quality of the oil fumes.

[0086] Furthermore, the spraying device 3 also includes a second water inlet pipe 33 and a second spraying section 32.

[0087] One end of the second water inlet pipe 33 is fixed inside the air duct 11.

[0088] The second spray section 32 is connected to the other end of the second water inlet pipe 33, and is arranged in a ring inside the air duct 11, located below the first spray section 31.

[0089] The second spray section 32 is located above the flow guiding device 4.

[0090] By installing a second spray section 32 inside the air duct 11, the range hood forms a two-stage spray system. During use, the oil fumes pass through the water curtain formed by the second spray section 32, which separates the oil from the fumes. Then, the separated oil fumes pass through the rotating water curtain formed by the first spray section 31 and the fan 2, which separates the oil fumes again, further improving the oil fume separation effect, increasing the performance of the range hood, improving the quality of oil fume emissions, and reducing environmental pollution.

[0091] This invention divides the flow guiding device 4 into a first flow guiding section 41 and a second flow guiding section 42, and covers the smoke outlet 413 of the first flow guiding section 41 with the second flow guiding section 42. In use, the second spray section 32 sprays water onto the outer peripheral wall of the first flow guiding section 41. The water flows towards the smoke inlet 412 under the action of gravity on the outer peripheral wall of the smoke inlet channel 411, forming a water curtain. When the oil fumes pass through the water curtain, the oil particles in the oil fumes are affected by gravity and move downward with the water flow, achieving the effect of oil fume separation. Then, the separated oil fumes are guided and dispersed by the second flow guiding section 42, which increases the contact area between the oil fumes and the rotating water mist formed by the first spray section 31, thereby enhancing the oil fume separation effect.

[0092] Furthermore, the second spray section 32 includes an annular water inlet cavity 322 and a second nozzle 321.

[0093] The annular water inlet cavity 322 is connected to the other end of the second water inlet pipe 33 and is disposed in the air duct 11.

[0094] The second nozzle 321 is disposed on the annular water inlet cavity 322 and communicates with the annular water inlet cavity 322.

[0095] like Figures 1 to 3 As shown, the present invention provides an annular water inlet cavity 322 within the air duct 11, allowing the second spray section 32 to be fixed within the air duct 11 via a second water inlet pipe 33. A second nozzle 321 is also provided on the annular water inlet cavity 322. During use, this increases the spray area of ​​the second spray section 32, resulting in a larger water curtain area that can fully contact the oil fumes. When the oil fumes are emitted, they first pass through the water curtain formed by the second spray section 32, ensuring sufficient contact between the oil particles and water. Under the influence of gravity, the oil in the fumes is filtered out. Then, the fumes pass through the rotating water curtain formed by the first spray section 31, further improving the oil fume separation effect and enhancing the practicality of the equipment.

[0096] like Figure 1 As shown, the second spray section 32 is disposed above the flow guiding device 4. The second flow guiding section 42 extends at least partially from the annular water inlet cavity 322 of the second spray section 32 near one end of the second spray section 32, so that the water sprayed by the second spray section 32 can better run along the outer peripheral wall of the first flow guiding section 41 to form a water curtain for separating oil fumes.

[0097] Specifically, such as Figures 1 to 5 As shown, the guide device 4 has a smoke inlet channel 411. Most of the oil fumes are discharged into the air outlet 13 through the smoke inlet channel 411. During use, the oil fumes are first separated by the water curtain formed by the first guide section 41 and the second spray section 32. The separated oil fumes enter the smoke inlet channel 411 and are then guided and diffused by the second guide section 42, which increases the contact area between the oil fumes and the rotating water curtain formed by the first spray section 31, further improving the oil fume separation effect, improving the quality of oil fume emissions, increasing the effectiveness of the range hood, and reducing air pollution.

[0098] like Figures 1 to 6 As shown, the range hood also includes a mounting bracket 5.

[0099] The fixing frame 5 includes a first fixing frame 51 and a second fixing frame 52.

[0100] The first fixing frame 51 is disposed on the outer wall of the first flow guide 41 and is evenly spaced along the circumference of the first flow guide 41.

[0101] The second fixing bracket 52 is disposed at one end of the second flow guide 42 near the first flow guide 41 and is connected to the outer wall of the first flow guide 41 to fix the second flow guide 42.

[0102] By setting a fixing bracket 5, the flow guiding device 4 is fixed on the inner peripheral wall of the air duct 11. The first fixing bracket 51 is used to fix the first flow guiding part 41 and is evenly spaced along the circumference of the first flow guiding part 41 to increase the stability of the first flow guiding part 41 in the air duct 11. The second fixing bracket 52 is set on the outer wall of the first flow guiding part 41 near the smoke outlet 413, so that the oil fumes can pass through the smoke inlet channel 411 of the first flow guiding part 41 and then be diverted by the second flow guiding part 42, increasing the contact area with the oil fumes and improving the performance of the range hood.

[0103] Furthermore, the range hood also includes a filter device 6, which is disposed in the air duct 11, connected to the inner peripheral wall of the air duct 11, and located between the fan 2 and the first spray section 31.

[0104] The filter device 6 has an opening, through which the fan shaft 21 passes and connects to the first spray section 31.

[0105] The present invention provides a filter device 6 between the fan 2 and the spray device 3. When in use, the filter device 6 can collect the water discharged from the air outlet 13 by the spraying water caused by the fan 2, thus saving water resources. At the same time, it can also filter the separated oil fumes again, achieving multiple filtration, enhancing the oil fume separation effect, and improving the performance of the range hood.

[0106] Furthermore, the range hood also includes a water collection device 7.

[0107] The water collection device 7 is installed inside the air duct 11 and is connected to the drain pipe 8. The water collection device 7 is located below the flow guiding device 4.

[0108] There is a gap between the outer periphery of the water collection device 7 and the inner peripheral wall of the air duct 11.

[0109] This invention achieves the guiding and dispersing effect of oil fumes by setting up a water collection device 7 and a baffle 43, and setting a gap between the water collection device 7 and the inner peripheral wall of the air duct 11, thereby increasing the contact area between the oil fumes and the water curtain and enhancing the oil fume separation effect. The water collection device 7 is set below the flow guiding device 4 and is connected to the drain pipe 8. The separated water-oil mixture is discharged outdoors through the drain pipe 8. There is no need to set up an oil collection device inside the range hood, nor is it necessary for the user to clean the oil collection device regularly. At the same time, the baffle 43 is set between the water collection device 7 and the first flow guiding part 41, which can guide the separated water-oil mixture, so that the water-oil mixture can be completely guided to the water collection device 7, thereby improving the use effect of the range hood.

[0110] The present invention can also install a smoke sensor (not shown in the figure) on the housing 1 and a flow meter (not shown in the figure) at the water inlet pipe 9. During use, the smoke alarm can be used to determine the amount of oil smoke, and the amount of water entering the water inlet pipe 9 can be controlled according to the amount of oil smoke. At the same time, the speed of the fan 2 can be increased to increase the amount of smoke smoke.

[0111] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A range hood, comprising a housing, wherein an air duct is formed within the housing, characterized in that: It also includes a fan, which is installed in the air duct to exhaust the fumes from the room; The spraying device is rotatably installed in the air duct and is connected to the fan drive, so that the spraying device can be rotated when the fan rotates. A flow guiding device is installed inside the air duct, located below the spray device, to guide the water sprayed by the spray device to flow downwards. The flow guiding device includes, The first guide section is disposed in the air duct, with a gap between one end and the inner wall of the air duct, and the other end extending towards the air outlet. The first guide section has a smoke inlet channel, which is provided through the extension direction of the first guide section. The smoke inlet channel includes a smoke inlet and a smoke outlet. The smoke inlet is located at one end of the first guide section, and the smoke outlet is located at the other end of the first guide section. The flow guiding device further includes a second flow guiding part, which is covered above the smoke outlet of the first flow guiding part and connected to the outer wall of the first flow guiding part. The second flow guiding part and the outer wall of the first flow guiding part have a gap to form a smoke outlet channel, which communicates with the smoke outlet.

2. The range hood according to claim 1, characterized in that: The fan includes a fan shaft, which is coaxially arranged in the air duct; The spraying device includes a first spraying section, which includes a spraying shaft. One end of the spraying shaft is connected to the fan shaft, and the other end is rotatably connected to a water inlet pipe for water intake.

3. A range hood according to claim 2, characterized in that: The other end of the spray shaft is provided with a cavity, and a bearing is provided in the cavity. The water inlet pipe can pass through the bearing and extend into the cavity. The first spray section includes a first nozzle connected to the outer peripheral wall of the spray shaft, and the first nozzle communicates with the outer peripheral wall of the cavity; The first nozzle is spaced on the outer peripheral wall of the cavity.

4. A range hood according to claim 2 or 3, characterized in that: The air duct has an air inlet and an air outlet. The fan is located near the air outlet, the flow guiding device is located near the air inlet, and the first spray section is located between the fan and the flow guiding device.

5. A range hood according to claim 4, characterized in that: The outer diameter of the first guide section gradually decreases from one end to the other.

6. A range hood according to claim 5, characterized in that: The airflow guiding device also includes a baffle plate, which is arranged around the inner peripheral wall of the air duct, with one end connected to the inner peripheral wall of the air duct and the other end extending towards the air inlet.

7. A range hood according to claim 4, characterized in that: The spraying device also includes, The second water inlet pipe is fixed at one end inside the air duct. The second spray section is connected to the other end of the second water inlet pipe and is arranged in a ring inside the air duct, located below the first spray section; The second spray section is located above the flow guiding device.

8. A range hood according to claim 7, characterized in that: The second spray unit includes, An annular water inlet cavity is connected to the other end of the second water inlet pipe and is disposed within the air duct; a second nozzle is disposed on the annular water inlet cavity and is connected to the annular water inlet cavity.

9. A range hood according to claim 4, characterized in that: It also includes a filter device, which is installed in the air duct, connected to the inner peripheral wall of the air duct, and located between the fan and the first spray section; The filter device has an opening, and the fan shaft passes through the opening and connects to the first spray section. A water collection device is installed inside the air duct and connected to the drain pipe. The water collection device is located below the flow guiding device. There is a gap between the outer periphery of the water collection device and the inner peripheral wall of the air duct.

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