CN212408792U

CN212408792U - Smoke exhaust ventilator

Info

Publication number: CN212408792U
Application number: CN202020899059.XU
Authority: CN
Inventors: 谭柏豪; 王春旭; 蒋济武
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-01-26
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a range hood, range hood includes: casing, main fan and rotary filter device. The rotary filter device comprises a plurality of rotary units, each rotary unit comprising: the air filter comprises a driven rotating assembly and a filter assembly which are connected, wherein the driven rotating assembly is constructed to drive the driven rotating assembly to rotate when air flows through, the filter assembly is used for filtering the flowing air, and the plurality of rotating units rotate independently. According to the utility model discloses a range hood, through setting up passive rotating assembly, the filtering component rotation does not need the motor to provide power, can practice thrift structural cost and move power consumptively. The contact area between the rotating filtering component and the airflow is increased, and the integral filtering effect can be improved. The rotary filter device is divided into a plurality of rotary units which rotate independently, and the starting torque required by the single rotary unit relative to the whole device is reduced because of lighter weight, and each rotary unit can flexibly rotate according to the air flow conditions at each position.

Description

Smoke exhaust ventilator

Technical Field

The utility model relates to a domestic appliance field especially relates to a range hood.

Background

Range hood near the air intake in air intake department or inside can set up the filter screen usually, through principles such as physics collision, condensation, filters the large granule object (mixed with oil droplet in the vapor) in the cooking process oil smoke, and it is inside that the grease that reduces in the oil smoke gets into the fan. On the other hand, the filter screen can intercept oil drops which are accumulated in the range hood for a long time and drip downwards, and can prevent the internal oil stains from directly dripping into food on the table surface of the kitchen range or in a pot.

In order to achieve a higher degree of grease separation, there are various forms of screens in prior art solutions. Some filter screens are flat metal filter screens, and are widely used in top-suction and side-suction cigarette machines due to simple structure and low manufacturing cost. Some filter screens are shaped in a mode of a forward cone or an inverted cone so as to increase the surface area of the filter screens and improve the filtering effect. Still other solutions improve the grease separation on the screen surface by treatment with a grid.

The size of the filter screen disclosed in the related art is generally large, the horizontal width of the filter screen is mostly larger than that of the air inlet, and the large-size filter screen is inconvenient in many aspects.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a range hood can improve filterable flexibility.

The utility model discloses range hood, include: a housing having an air inlet; the main fan is positioned in the shell; a rotary filter device comprising a plurality of rotary units, each rotary unit comprising: the air filter comprises a passive rotating assembly and a filter assembly, wherein the passive rotating assembly is constructed to drive the passive rotating assembly to rotate when air flows through the passive rotating assembly, the filter assembly is connected with the passive rotating assembly, and the filter assembly is used for filtering the air flow flowing through the filter assembly; each rotating unit is rotatably connected to the machine shell, and the rotating units rotate independently.

According to the utility model discloses range hood, it includes rotary filter device, and rotary filter device is including the passive rotating assembly and the filtering component that link to each other, because passive rotating assembly can be driven rotatoryly by the air current, and the filtering component is rotatory to need not the motor to provide power, can practice thrift structural cost and move power consumptively. The contact area between the rotating filtering component and the airflow is increased, and the integral filtering effect can be improved. The rotary filtering device is divided into a plurality of rotary units which rotate independently, and compared with the whole device, a single rotary unit reduces the starting torque required by light weight, each rotary unit can flexibly rotate according to the air flow conditions at each position, and the rotary unit at the position with high wind speed is not restricted by the rotary unit at the position with low wind speed, so that the rotary filtering device is more flexible in filtering. In addition, when the single rotating unit can be disassembled, the cleaning and the replacement are very convenient.

In some embodiments, the plurality of rotating units are arranged adjacent to the air inlet and along the length direction of the air inlet.

Optionally, the plurality of rotating units are sequentially arranged along the direction of the rotating axis of the rotating unit, the casing is connected with a plurality of supporting seats arranged at intervals along the direction of the rotating axis, two ends of the rotary filtering device are respectively and rotatably connected to the supporting seats, and at least one of the supporting seats is arranged between two adjacent rotating units.

Specifically, at least two rotating units are connected between two adjacent supporting seats, one end of each rotating unit is supported on the supporting seat, and the other end of each rotating unit is supported on the adjacent rotating unit, or two ends of each rotating unit are respectively supported on the adjacent rotating units.

Furthermore, the rotating units are connected to the supporting seat or another rotating unit through rotating shafts, and every two adjacent rotating units share one rotating shaft; and a bearing is arranged between at least one rotating unit and the rotating shaft.

In some embodiments, the filter assembly includes a screen cylinder, and the passive rotation assembly is disposed within the screen cylinder.

Specifically, the filter assembly includes: the filter screen cylinder is connected between the two fixed disks, and two ends of the passive rotating assembly are connected to the two fixed disks.

In some embodiments, the passive rotating assembly comprises: the supporting disc is connected with the fixed disc; a plurality of blades connected to the support plate.

Further, each passive rotating assembly comprises a plurality of supporting disks, the supporting disks are arranged at intervals along the direction of the rotating axis of the passive rotating assembly, the two outermost supporting disks are respectively connected to the two fixed disks, a plurality of blades are arranged along the direction surrounding the rotating axis, each blade extends along the direction of the rotating axis of the passive rotating assembly, and each blade is connected to the supporting disks.

Optionally, one of the supporting disc and the fixed disc is provided with an insertion block, and the other is provided with a jack matched with the insertion block; the periphery of the supporting disk is provided with a clamping groove which is communicated along the thickness direction, and the blades are arranged in the clamping groove in a penetrating mode.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view of a range hood according to an embodiment of the present invention.

Fig. 2 is a sectional view of the range hood of the embodiment shown in fig. 1.

Fig. 3 is a schematic view of an airflow path of a range hood according to an embodiment of the present invention.

Fig. 4 is a perspective view of a rotary filter device according to an embodiment of the present invention.

Fig. 5 is a disassembled view of a rotary unit of the rotary filter device of the embodiment shown in fig. 4.

Fig. 6 is a cross-sectional view of the rotary filter device of the embodiment shown in fig. 4.

Fig. 7 is an exploded view of the rotary filter device of the embodiment shown in fig. 4.

Reference numerals:

a range hood 100,

A rotary filter device 1, a shell 2, an air inlet 21, a supporting seat 22, a main fan 3,

A rotary unit 10, a rotary shaft 101, a bearing 102,

Passive rotating assembly 11, support plate 111, jack 1111, slot 1112, blade 112,

Filter assembly 12, filter cartridge 121, fixed disk 122, insert 1221.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "bottom", "inner", "outer", "axial", and the like refer to the orientation or positional relationship shown in the drawings, which are used for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A range hood 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 7.

The range hood 100 of the embodiment of the present invention, as shown in fig. 1-3, includes: casing 2, main fan 3, rotary filter 1. The casing 2 is provided with an air inlet 21, the main fan 3 is positioned in the casing 2, and the main fan 3 drives air flow to be sucked from the air inlet 21 when in operation.

The rotary filter device 1 comprises a plurality of rotary units 10, each rotary unit 10 comprising: passive rotating assembly 11 and filtering component 12, passive rotating assembly 11 constitutes and drives passive rotating assembly 11 and rotates when the air current flows through, and filtering component 12 links to each other with passive rotating assembly 11, and filtering component 12 is used for filtering the air current that flows through, and wherein, every rotary unit 10 all rotates and connects on casing 2, and mutual independence rotates between a plurality of rotary unit 10.

Here, the rotary filter device 1 may be disposed inside the casing 2, or may be disposed at the air inlet 21, and in some examples, may be disposed below the casing 2 even near the air inlet 21, where a specific position of the rotary filter device 1 is not limited, and in an airflow flowing direction, the rotary filter device 1 is located upstream of the main fan 3, and is configured to filter the airflow and reduce dirt such as grease in the oil smoke from entering the main fan 3.

In the example of fig. 2, the rotary filter device 1 is located in the casing 2 of the range hood 100 and located between the main fan 3 and the air inlet 21, as shown in fig. 3, when the range hood 100 is started, the main fan 3 starts to work, oil smoke outside the range hood 100 is sucked from the air inlet 21, flows through the rotary filter device 1, and the filtered smoke flows out from an air duct connected to the top of the range hood 100.

It can be understood that particulate matters such as grease and impurities can be carried in gases such as oil smoke, the chance that the grease enters the inside of the main fan 3 and is even discharged to the outside can be reduced by arranging the rotary filtering device 1, the rotary filtering device 1 is in contact with the oil smoke in one step than the main fan 3, and the rotary filtering device 1 intercepts stains such as grease and reduces the stain adhesion amount on the surfaces of internal parts such as the main fan 3 through collision, condensation and other modes. And the mode of rotary filtration, compare in setting up static filter equipment, rotary filtration device 1 can make full use of the surface of filter assembly 12, and each angle of circumference of filter assembly 12 can both be changeed to the windward department, and this is equivalent to having improved area of contact to improve whole filter capacity.

The embodiment of the utility model provides an in, passive rotating assembly 11 drives filtering component 12 and carries out the rotation filtering work, passive rotating assembly 11 is not the motor, it also does not link to each other with the motor, need not rotate with the help of the power of motor and rotate, it moves with the help of the air current that main fan 3 absorbs, work when main fan 3 begins, inhale the air current from air intake 21, passive rotating assembly 11 drives self rotatoryly with the help of the air current that these flowed through, will be useless originally, will get into the gas current utilization again from range hood 100, not only the energy has been practiced thrift, still to having carried out the reuse to useless air current energy in originally will directly diffusing into the air.

The rotary filter device 1 comprises a plurality of rotary units 10, each rotary unit 10 can independently rotate, namely, each rotary unit 10 rotates, and one rotary unit 10 does not need to drag the other rotary unit 10 to rotate when rotating, so that the filtering flexibility of the rotary filter device 1 can be improved. Specifically, in the working process of the range hood 100, the wind speeds of all the positions on the same air duct section are different due to the position of the main fan 3 and the air flow distribution, the smoke amount at the large wind speed position is large, the filtering burden is heavy, the smoke amount at the small wind speed position is small, and the filtering burden is relatively light. In the solution of the present application, by dividing the rotary filter device 1 into a plurality of rotary units 10, each rotary unit 10 can be rotated by its own airflow. When the wind speed is high at the location of the rotary unit 10, the rotary unit 10 will normally rotate faster, where the rotary unit 10 can be filtered more by increasing the contact area. When the speed of the wind is low at the location of the rotary unit 10, the rotary unit 10 will generally rotate slowly, where the wind speed is low with a corresponding low amount of smoke, and the filtering operation can be performed well even if the rotary unit 10 rotates slowly.

In addition, when a single rotary unit 10 is detachable, frequent detachment cleaning of rotary units 10 having a large filtration amount is possible, and the frequency of cleaning of rotary units 10 having different filtration amounts is flexibly set. And when the single rotary unit 10 is detachable, its replacement is also very convenient.

In some embodiments, as shown in fig. 3, the plurality of rotary units 10 are adjacent to the air inlet 21, so that grease and the like can be prevented from entering the interior of the range hood 100.

Specifically, the plurality of rotary units 10 are arranged in a row along the length direction of the air inlet 21. It will be appreciated that, since the length dimension of the air inlet 21 is generally large, the number of the rotary units 10 arranged in this way can be set to be large. And compared with the arrangement in the length direction of the vertical air inlet 21, the machine shell 2 can provide enough installation space, and the moving space of each rotating unit 10 is enough, so that the filtering can be freely rotated.

Alternatively, as shown in fig. 3, a plurality of rotary units 10 are sequentially arranged along the direction of the rotation axis of the rotary unit 10, a plurality of supporting seats 22 are connected to the housing 2 at intervals along the direction of the rotation axis, two ends of the rotary filter device 1 are respectively rotatably connected to the supporting seats 22, and at least one supporting seat 22 is arranged between two adjacent rotary units 10.

The rotary unit 10 is arranged along the direction of the rotary axis, the rotary axis of the rotary unit is the same straight line, and when the rotary unit is in rotary motion, the arrangement is convenient for the rotary filter device 1 to cover the whole airflow inflow surface as much as possible under the condition that the occupied volume is as small as possible, so that the filter work is more complete. Supporting seat 22 interval distribution plays support and fixed effect, also sets up supporting seat 22 between two adjacent rotary unit 10, rather than only one head-to-tail setting supporting seat 22, can further improve rotary filter device 1 supporting effect, avoids only one head-to-tail to support and produces great bending deformation when leading to centre department to rotate, owing to can reduce rotary filter device 1 and too greatly rock and rub parts around when rotating.

In some embodiments, the rotary filter device 1 comprises four rotary units 10, and the number of the supporting seats 22 is 3, wherein two supporting seats 22 are disposed at both ends of the rotary filter device 1, and the remaining one supporting seat 22 is located at the middle position. The arrangement method can be an arrangement method of a conventional household range hood 100, the household cooking bench is usually two at the left and the right, and each side cooking bench corresponds to two rotating units 10. 3 supporting seats 22 are respectively fixed in the middle and on both sides, so that the rotary filter device 1 can be stably fixed on the machine shell 2, the supporting seats 22 are small in quantity and small in occupied area, the arrangement influence on the rotary unit 10 is small, and the interference on the rotary motion of the rotary filter device 1 is small.

Specifically, as shown in fig. 3, at least two rotary units 10 are connected between two adjacent support seats 22, one end of each rotary unit 10 is supported on one support seat 22, and the other end of each rotary unit 10 is supported on the adjacent rotary unit 10, or two ends of each rotary unit 10 are respectively supported on the respective adjacent rotary units 10. That is, between two adjacent supporting seats 22, two or more rotary units 10 may be arranged. When two rotary units 10 are arranged, each rotary unit 10 is supported at one end on the support base 22 and at the other end on the adjacent rotary unit 10. When two or more rotary units 10 are arranged, the rotary units 10 on both sides are supported at one end on the support base 22 and at the other end on the adjacent rotary unit 10, and the rotary units 10 not on both sides are supported at both ends thereof on the rotary units 10 on both sides, respectively.

By this arrangement, the number of the supporting seats 22 is small, and the occupied space is small, so that more arrangement space is left for the rotary filter device 1, and the filter area is increased.

Further, as shown in fig. 6 and 7, the rotary unit 10 is connected to the support base 22 or another rotary unit 10 through a rotary shaft 101, and every two adjacent rotary units 10 share one rotary shaft 101.

The rotation unit 10 is connected to the support seat 22 through the rotation shaft 101, so that the support seat 22 can ensure that the interference of the rotation movement of the rotation unit 10 can be reduced under the condition of maintaining the rotation unit 10 to be rotatably connected to the casing 2. Every two adjacent rotating units 10 share one rotating shaft 101, so that the number of parts can be reduced, and the assembly compactness is improved.

Optionally, a bearing 102 is disposed between at least one rotating unit 10 and the rotating shaft 101, so that the rotating friction can be reduced, and the rotating smoothness can be improved.

Of course, the way that the rotating unit 10 is supported by the rotating shaft 101 and the bearing 102 for rotation may be replaced by other ways, for example, between two rotating units 10, one rotating unit 10 may be sleeved on the other rotating unit 10.

In some embodiments, as shown in fig. 3, filter assembly 12 includes a screen cylinder 121, and passive rotating assembly 11 is disposed within screen cylinder 121.

The filter assembly 12 is a filter screen cylinder 121, which has a three-dimensional structure compared with a planar filter screen, so that the surface area is increased, the contact area with the oil smoke is increased, and the filtering effect is improved. Compare and establish outside filter screen cylinder 121 alone passive rotating assembly 11, passive rotating assembly 11 establishes and practice thrift the space more in filter screen cylinder 121, has reduced rotary filter device 1's volume, has promoted overall structure's pleasing to the eye degree, neatly degree to the design that is located inside makes the structure inseparabler, and transmission efficiency is higher, has reduced transmission loss, has promoted transmission efficiency. And the passive rotating assembly 11 is arranged inside the filter screen cylinder 121, so that the passive rotating assembly 11 can be protected.

Specifically, as shown in fig. 3, the filter assembly 12 includes: two fixing plates 122, the filter screen cylinder 121 is connected between the two fixing plates 122, and both ends of the passive rotating assembly 11 are connected to the two fixing plates 122.

Two fixing discs 122 are respectively arranged at two ends, so that the overall appearance of the passive rotating assembly 11 is formed and the shape of the cross section of the filter screen cylinder 121 is matched. Specifically, when the filter cartridge 121 is a cylinder, the fixing plate 122 is also a circle, and the fixing plate 122 functions to support the entire mechanism.

In some embodiments, as shown in fig. 6 and 7, the passive rotating assembly 11 includes: support disc 111 and blades 112. The support plate 111 is connected with the fixed plate 122, and the plurality of blades 112 are connected with the support plate 111

The supporting plate 111 is connected with the fixed plate 122, connects the passive rotating assembly 11 and the filtering assembly 12 together, plays a role in conduction, is consistent with the cross-sectional shape of the filter screen cylinder 121, and also plays a role in supporting the filtering assembly 12 and the passive rotating assembly 11 to a certain extent. The blades 112 are connected to the supporting plate 111, the blades 112 are the main structure of the rotation of the passive rotating assembly 11, after being acted by the airflow, the blades 112 are light and thin, and the structure that the blades 112 can rotate by the force of the airflow enables the blades 112 to rotate, the blades 112 rotate to drive the supporting plate 111 and the whole passive rotating assembly 11 to rotate, the supporting plate 111 rotates, the fixed plate 122 connected with the supporting plate 111 also rotates, that is, the filtering assembly 12 is driven to perform the rotary filtering work.

Further, as shown in fig. 7, each passive rotating assembly 11 includes a plurality of support plates 111, the plurality of support plates 111 are disposed at intervals along the direction of the rotation axis of the passive rotating assembly 11, the two outermost support plates 111 are respectively connected to two fixed plates 122, a plurality of blades 112 are arranged along the direction surrounding the rotation axis, each blade 112 extends along the direction of the rotation axis of the passive rotating assembly 11, and each blade 112 is connected to the plurality of support plates 111.

The supporting discs 111 play a role in supporting the passive rotating assembly 11, in one rotary filter device 1, the number of the supporting discs 111 is at least two, and the distance between two adjacent supporting discs 111 of the plurality of supporting discs 111 is approximately equal, so that the stress on each supporting disc 111 is uniform, the supporting force applied by the supporting discs 111 and the force applied by the rotation are uniformly distributed, and the structural stability is improved. In one embodiment, two support plates 111 are provided at two ends of the passive rotating assembly 11, and are connected to the fixed plate 122 for supporting and driving. The blades 112 are uniformly distributed, the space occupied by each blade 112 is approximately the same, each blade 112 can be enabled to be acted by air flow as much as possible, the rotating rotation starting force of the blades 112 is increased, the blades 112 extend to be connected with the supporting disc 111 as much as possible, the area of the blades 112 is increased, the contact area between the blades and the air flow is increased, the rotating force of the blades is increased, the blades 112 extend to the supporting disc 111 to play a transmission role, the rotating force is transmitted to the supporting disc 111, and therefore the filtering assembly 12 is driven to rotate.

Alternatively, as shown in fig. 7, one of the supporting plate 111 and the fixed plate 122 is provided with a plug 1221, and the other is provided with a socket 1111 that mates with the plug 1221.

The supporting plate 111 and the fixing plate 122 are fixed to each other by the mating pieces of the plug 1221 and the insertion hole 1111, and this mating method is not the only method, and other mating and fixing methods are also within the scope of the present application, and are not described herein.

Optionally; a slot 1112 penetrating in the thickness direction is provided on the outer periphery of the support plate 111, and the blade 112 is inserted into the slot 1112. The blades 112 are connected with the supporting disc 111 through the clamping grooves 1112, and the connection mode can reduce the resistance on the blades 112, reduce the rotation resistance of the blades and improve the rotation capacity of the blades 112.

The mechanism and operation of extractor hood 100 in one embodiment is described below in conjunction with fig. 1-7.

As shown in fig. 1 to 3, the extractor hood 100 includes: a casing 2, a main blower 3 and a rotary filter device 1. The casing 2 is provided with an air inlet 21, the main fan 3 is positioned in the casing 2, the rotary filter device 1 is positioned between the air inlet 21 and the main fan 3 in the casing 2, and the rotary filter device 1 comprises four rotary units 10.

Each rotary unit 10 includes: filter assembly 12 and passive rotating assembly 11, filter assembly 12 includes two fixed disks 122 and filter screen cylinder 121, and filter screen cylinder 121 connects between two fixed disks 122, and passive rotating assembly 11 establishes in filter screen cylinder 121.

The passive rotating component 11 is configured to drive the passive rotating component 11 to rotate when the airflow flows through, and the passive rotating component 11 includes: two supporting disks 111 and a plurality of blades 112, the blades 112 are connected to the supporting disks 111, the two supporting disks 111 are arranged at intervals along the rotation axis direction of the passive rotating assembly 11, the two supporting disks 111 are respectively connected to the two fixed disks 122 through the matching of the plug 1221 and the insertion hole 1111, and the plurality of blades 112 are arranged along the direction surrounding the rotation axis.

Each rotary unit 10 is adjacent to the air inlet 21 and arranged along the length direction of the air inlet 21, that is, the rotation axes of the four rotary units 10 are arranged along the length direction of the air inlet 21, and the four rotary units 10 are connected with the bearing 102 through the rotating shaft 101.

The two ends of the rotary filter device 1 are provided with the supporting seats 22, and the two rotary units 10 positioned in the middle of the four rotary units 10 are also connected through the supporting seats 22.

When the range hood 100 is started, the main fan 3 starts to operate, the main fan 3 sucks oil smoke from the air inlet 21 along with air flow, when the air flow flows through the rotary filtering device 1, the blades 112 in the passive rotating assembly 11 are rotated under the action of the air flow, the blades 112 move simultaneously to drive the supporting disc 111 to rotate, the supporting disc 111 drives the fixed disc 122 connected with the supporting disc 111, the fixed discs 122 at two ends rotate to drive the filter screen cylinder 121 to rotate, and even if the filter assembly 12 performs rotary filtering work.

The flow velocity of the air flow received by each rotary unit 10 is different, the rotating speed of the air flow is also different, the rotary units 10 are arranged on the same axis and connected through the rotating shaft 101, therefore, the rotary units 10 rotate independently without interference, and the single rotary unit 10 can perform the respective filtering work on different oil smoke areas. After a period of use, the filter assemblies 12 on the rotary units 10 become contaminated with oil, and one of the rotary units 10 can be removed individually for independent cleaning or replacement.

Other configurations of the range hood 100 according to the embodiment of the present invention, such as the main fan 3 and the bearing 102, and the operation thereof, are known to those skilled in the art, and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A range hood, comprising:

a housing having an air inlet;

the main fan is positioned in the shell;

a rotary filter device comprising a plurality of rotary units, each rotary unit comprising: the air filter comprises a passive rotating assembly and a filter assembly, wherein the passive rotating assembly is constructed to drive the passive rotating assembly to rotate when air flows through the passive rotating assembly, the filter assembly is connected with the passive rotating assembly, and the filter assembly is used for filtering the air flow flowing through the filter assembly; wherein,

each rotary unit is rotatably connected to the machine shell, and the rotary units rotate independently.

2. The range hood of claim 1, wherein the plurality of rotary units are disposed adjacent to the air inlet and arranged along a length direction of the air inlet.

3. The range hood according to claim 1, wherein a plurality of the rotary units are sequentially arranged along a direction of a rotation axis of the rotary units, a plurality of supporting seats are connected to the housing at intervals along the direction of the rotation axis, two ends of the rotary filter device are respectively rotatably connected to the supporting seats, and at least one of the supporting seats is arranged between two adjacent rotary units.

4. The range hood according to claim 3, wherein at least two of the rotating units are connected between two adjacent supporting seats, one end of each rotating unit is supported on the supporting seat and the other end of each rotating unit is supported on the adjacent rotating unit, or two ends of each rotating unit are respectively supported on the respective adjacent rotating units.

5. The range hood of claim 4, wherein the rotary unit is connected to the support base or another rotary unit through a rotary shaft, and each two adjacent rotary units share one rotary shaft; and a bearing is arranged between at least one rotating unit and the rotating shaft.

6. The range hood of claim 1, wherein the filter assembly comprises a screen cylinder, and the passive rotating assembly is disposed within the screen cylinder.

7. The range hood of claim 6, wherein the filter assembly comprises: the filter screen cylinder is connected between the two fixed disks, and two ends of the passive rotating assembly are connected to the two fixed disks.

8. The range hood of claim 7, wherein the passive rotating assembly comprises:

the supporting disc is connected with the fixed disc;

a plurality of blades connected to the support plate.

9. The range hood according to claim 8, wherein each of the passive rotating assemblies includes a plurality of the supporting disks, the supporting disks are spaced apart from each other in a direction of a rotation axis of the passive rotating assembly, two outermost supporting disks are respectively connected to two outermost fixed disks, a plurality of the blades are arranged in a direction surrounding the rotation axis, each of the blades extends in a direction of the rotation axis of the passive rotating assembly, and each of the blades is connected to the supporting disks.

10. The range hood of claim 8, wherein one of the supporting disk and the fixed disk is provided with an insertion block, and the other is provided with a jack matched with the insertion block; the periphery of the supporting disk is provided with a clamping groove which is communicated along the thickness direction, and the blades are arranged in the clamping groove in a penetrating mode.