CN111380096B

CN111380096B - Fume exhaust fan

Info

Publication number: CN111380096B
Application number: CN202010149898.4A
Authority: CN
Inventors: 陈源
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2023-03-03
Anticipated expiration: 2040-03-06
Also published as: CN111380096A

Abstract

The invention discloses a range hood, which comprises a smoke collecting hood, a fan frame arranged above the smoke collecting hood and a fan system arranged in the fan frame, wherein the smoke collecting hood is provided with an air inlet, the fan system comprises a volute frame and an impeller arranged in the volute frame, and the range hood is characterized in that: the fan system is connected with the air rack through the suspension device, the suspension device comprises a guide rail and a support assembly, the guide rail is longitudinally arranged on the inner side wall of the fan rack, the support assembly is arranged on the fan system and can be in a fixing state limited by the guide rail and a moving state separated from the guide rail, and when the support assembly is in the moving state, the fan system can move along the extending direction of the guide rail along with the support assembly and can pass through an air inlet of the fume collecting hood. Compared with the prior art, the invention has the advantages that: the whole fan system can be drawn out from the air inlet under the condition that the whole fan system is hung on a wall, the whole fan system is hung under the smoke collecting hood to be cleaned, and the cleaning effect is easy to identify.

Description

Fume exhaust fan

Technical Field

The invention relates to an oil fume purification device, in particular to a range hood.

Background

The range hood has become one of indispensable kitchen household electrical appliances in modern families, and the range hood generally comprises a top suction type range hood and a side suction type range hood, and the top suction type range hood has more and more extensive application due to the advantages of neatness, lightness, small occupied space and the like. The top-suction type range hood generally includes a fume collecting hood, a fan housing located on the fume collecting hood, and a volute, an impeller, and a motor for driving the impeller are installed in the fan housing.

As mentioned above, the fan system of the existing top-suction range hood is generally installed in a fan frame, and after long-term use, a large amount of condensed oil is accumulated on the impeller, which seriously affects the characteristics of the fan, such as air volume and noise, and reduces the oil smoke suction effect of the range hood. The user is required to clean the impeller regularly, and because of the installation characteristics of the fan system, the impeller is quite complicated to assemble and disassemble, and parts such as the decorative cover and the fan cover need to be disassembled. Even for professional service technicians, cleaning the impeller is not a simple task, especially in the complex kitchen environment of the user, and even the complete machine needs to be removed to clean the impeller.

Some range hoods on the market have built-in cleaning devices, utilize steam, high-temperature liquid etc. to clean the impeller, as the chinese patent of application number 201920603630.6 discloses a cleaning device of range hood, it includes the water tank that connects gradually through the pipeline, a water pump, steam generator and spray tube, the water inlet of water pump is linked together with the water tank, the delivery port of water pump is linked together with steam generator, steam generator's steam outlet is linked together with the spray tube, the steam hole of seting up on the spray tube is close to one side of the blade of wind wheel and sets up, for the greasy dirt on the injection high-pressure liquid washing blade.

However, the existing cleaning modes are not thorough in cleaning, the cleaning degree is not easy to observe, and the cleaning effect cannot be ensured.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood aiming at the defects in the prior art, so that the cleaning effect is improved and is convenient to identify.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes collection petticoat pipe, sets up fan frame and the fan system of setting in the fan frame in collection petticoat pipe top, the air intake has been seted up on the collection petticoat pipe, the fan system includes volute casing frame and the impeller of setting in the volute casing frame, its characterized in that: the fan system is connected with the fan frame through a suspension device, the suspension device comprises a guide rail and a support assembly, the guide rail is longitudinally arranged on the inner side wall of the fan frame, the support assembly is arranged on the fan system, the support assembly can be in a fixed state limited by the guide rail and in a moving state separated from the guide rail, and when the support assembly is in the moving state, the fan system can move along the extending direction of the guide rail along with the support assembly and can pass through an air inlet of the smoke collecting hood.

Preferably, the guide rail is provided with at least two limiting ports which are arranged at intervals from top to bottom, the side, facing the fan system, of the guide rail is sunken towards the direction far away from the fan system, the support assembly comprises idler wheels matched with the guide rail, and the idler wheels are clamped into the limiting ports to be in a fixed state or separated from the limiting ports to be in a moving state.

In order to facilitate driving the roller to act relative to the limiting opening, the support component further comprises a connecting rod, the roller is connected with the connecting rod in a rotating mode, the connecting rod is further connected with a volute rack of the fan system in a rotating mode and can drive the roller to rotate relative to the guide rail so as to be clamped into or separated from the limiting opening, and the rotating shaft of the connecting rod is consistent with the extending direction of the rotating shaft of the roller.

In order to further support and stabilize the position of the fan system, the support assembly further comprises a support which is arranged on the side face of the volute frame and used for supporting the volute frame of the fan system, one end of the connecting rod is connected with the support into a whole, the other end of the connecting rod is connected with the volute frame, and the idler wheel is arranged at the joint of the support and the connecting rod.

Preferably, the volute frame comprises a front cover plate and a rear cover plate, the support extends between the front cover plate and the rear cover plate, a connecting rod on one side of the support is rotatably connected with the front cover plate of the volute frame, a connecting rod on the other side opposite to the support is rotatably connected with the rear cover plate of the volute frame, a notch which is sunken towards the middle of the volute frame is formed in the position of the volute frame corresponding to the support, the support can be inserted into the corresponding notch, and the upper edge of the notch is supported on the corresponding support so that the support supports the volute frame.

Preferably, for making linkage stably support and drive fan system and remove, the guide rail has four, and per two guide rails become one set of, arrange respectively in the fan frame corresponding position, and two guide rails of same group are located the both sides of impeller axis, the guide rail has two sets of that front and back interval arranged, and each guide rail of group corresponds a set of support, and two guide rails correspond the both sides of same support respectively around being located impeller axis homonymy.

Preferably, the support comprises a first support and a second support which respectively extend between the front cover plate and the rear cover plate, the first support is positioned above the second support, the suspension device further comprises a pull rod which extends in the longitudinal direction, the middle of each connecting rod is rotatably connected with the pull rod, and the first support, the second support, the connecting rods and the volute frame form a four-bar mechanism; the notch comprises a first notch corresponding to the first support and a second notch corresponding to the second support.

In order to transfer the gravity energy of the fan system to the fan frame, so that the fan system is more stable in the working state of the range hood, the guide rail is further provided with a bearing block protruding in the direction away from the fan system, a mounting hole is formed in the position of the fan frame corresponding to the bearing block, and the bearing block extends out of the fan frame from the mounting hole and is supported on the lower edge of the mounting hole.

For the air outlet board that makes fan system and fan frame can simply separate, can effectively guarantee the sealed shock insulation of wind channel and fan system when connecting again after assembling, the fan frame is still including the air outlet board that is located the top, the export has been seted up on the air outlet board, still be formed with the fan air outlet on the volute frame of fan system, the export corresponds with the fan air outlet, the exit is provided with annular first sealed the pad, fan air outlet department is provided with annular second sealed pad, the lower surface of first sealed pad is the cockscomb structure, the upper surface of the sealed pad of second is the cockscomb structure with the first sealed pad adaptation.

In order to facilitate cleaning of the impeller, a fan air inlet is further formed in a volute frame of the fan system, an air inlet ring is arranged at the position of the fan air inlet, an avoiding notch is formed in the position, adjacent to the fan air inlet, of the volute frame, the avoiding notch is communicated with the fan air inlet, the air inlet ring comprises an annular body and an extending piece protruding outwards from the outer periphery of the body, the shape of the extending piece is matched with the avoiding notch to be clamped into the avoiding notch, and a brush extending into the volute frame and used for cleaning the impeller can be installed at the extending piece.

Preferably, in order to guide the oil liquid and the waste liquid flow and the oil fume flow into the impeller during cleaning, the fan system further comprises a flow guide structure arranged at the bottom of the volute casing frame.

In order to facilitate the collection of waste liquid during cleaning, the bottom of the diversion structure is detachably connected with a waste liquid collecting cup for collecting the waste liquid flowing down by the diversion structure.

Compared with the prior art, the invention has the advantages that: the whole fan system can be drawn out from the air inlet under the condition that the whole fan system is hung on a wall by adopting a suspension device which can be locked and separated between the fan system and the fan frame, the whole fan system is suspended under the smoke collecting hood for cleaning, the impeller is driven to run at an ultra-low speed by a special cleaning mode motor through replacing a special air inlet ring for cleaning, the semi-automatic cleaning of the impeller is carried out, the cleaning effect is easy to identify, and no special requirements are provided for the installation environment of a user, a cabinet structure and the like; through the matching of the roller of the suspension device and the limiting opening, stable connection can be realized, and separation can be realized if necessary; the fan system is connected with the air outlet plate of the fan frame by adopting two mutually embedded sealing gaskets, so that the fan system can be simply separated, and the sealing of an air duct and the shock insulation of the fan system can be effectively ensured during connection after assembly; set up the water conservancy diversion structure in spiral case frame bottom, can carry out the water conservancy diversion to fluid, clean waste liquid and oil fume gas stream, the cup is collected to the below installation waste liquid when clean, can avoid clean waste liquid to fall on top of a kitchen range or pan.

Drawings

FIG. 1 is a schematic view of the operating state of a range hood according to an embodiment of the present invention;

FIG. 2 is a sectional view of the range hood according to the embodiment of the present invention;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is a schematic view of a fan frame and a portion of a suspension device of the range hood according to the embodiment of the present invention;

FIG. 5 is a schematic view of a fan system and a portion of a suspension assembly of a range hood according to an embodiment of the present invention;

FIG. 6 is a schematic view of a portion of a suspension assembly of the range hood according to the embodiment of the present invention;

fig. 7 is a schematic view of a fan system of a range hood according to an embodiment of the present invention (hidden air inlet ring);

fig. 8 is a partially enlarged schematic view of a pull-down initial state of a suspension device of the range hood according to the embodiment of the present invention;

fig. 9 is a schematic diagram of a cleaning state of the range hood according to the embodiment of the invention;

fig. 10 is a sectional view of a range hood according to an embodiment of the present invention in a cleaning state;

fig. 11 is a schematic view illustrating an installation of an air inlet ring and a brush of a fan system of a range hood according to an embodiment of the present invention;

fig. 12 is a schematic view of a waste liquid collecting cup of a range hood according to an embodiment of the present invention.

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 or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration only and are not to be construed as limiting, for example, "upper" and "lower" are not necessarily limited to directions opposite or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 and 2, a range hood includes a smoke collecting cover 1, a fan frame 2 disposed above the smoke collecting cover 1, a fan system 3 disposed in the fan frame 2, and a suspension device 4 connecting the fan system 3 and the fan frame 2. The smoke collecting cover 1 is provided with an air inlet 11, so that oil smoke can enter the fan frame 2 through the air inlet 11 and is discharged from the top of the fan frame 2. The fan frame 2 is provided with a U-shaped fan outer cover 7 with an opening at the back outside.

The fan system 3 includes a volute housing 31 (which may be a volute or a box-shaped structure integrated with the volute), an impeller 32 disposed in the volute housing 31, and a motor (not shown) for driving the impeller 32 to rotate. The volute frame 31 of the fan system 3 is connected with the inner side wall of the fan frame 2 through a suspension device.

Referring to fig. 2 to 7, the scroll frame 31 includes a front cover plate 311, a rear cover plate 312, and a side plate 313 connected between the front cover plate 311 and the rear cover plate 312, the front cover plate 311 is provided with a fan inlet 314, and a fan outlet 315 is formed at a top end of the scroll frame 31.

The suspension device 4 includes a guide rail 41, a bracket assembly 42, and a tie rod 43, wherein the guide rail 41 is provided on an inner side wall of the blower frame 2, the guide rail 41 has an even number (4 in the present embodiment), each two guide rails 41 are arranged in a set at corresponding positions in the blower frame 2, respectively, and the two guide rails 41 of each set are located on both sides of the axis of the impeller 32. In the present embodiment, the fan inlet 314 formed on the volute housing 31 is forward, so that the two guide rails 41 of each set are respectively located at the left and right sides of the inner side wall of the fan housing 2; the guide rail 41 has two sets arranged at intervals in the front-rear direction, one set corresponding to the front cover plate 311 of the scroll frame 31 and the other set corresponding to the rear cover plate 312 of the scroll frame 31.

Each guide rail 41 is recessed towards the side facing the fan system 3 towards the direction far away from the fan system 3 to form a limiting opening 411, in the embodiment, the number of the limiting openings 411 on each guide rail 41 is three, one of the limiting openings is located at the position, close to the top, of the guide rail 41, and the other two limiting openings are arranged at the position, close to the bottom, of the guide rail 41 at intervals up and down. Alternatively, the number of the limiting openings 411 may be two or more than three, so long as at least two limiting openings are included and are arranged at intervals up and down. The guide rail 41 is fixed to the fan frame 2 by screws 413.

The support assembly 42 comprises two, each support assembly 42 corresponding to a different set of two guide rails 41 located in the same side of the axis of the fan system 3, inside the fan frame 2. Each bracket assembly 42 includes a first bracket 421, a second bracket 422, a connecting rod 423 and a roller 424, wherein the first bracket 421 is located above the second bracket 422, the connecting rod 423 is fixedly connected to two ends of the first bracket 421 and two ends of the second bracket 422, and preferably, each bracket and the connecting rod are integrally formed. The connection point of each bracket and the link 423 is formed with an escape groove 425 recessed toward the fan system 3 from the surface facing the fan frame 2, the roller 424 is rotatably provided at each escape groove 425, the rotation axis of the roller 424 coincides with the extending direction of each bracket, and in this embodiment, the roller 424 is preferably made of rubber for extending forward and backward. The other end of each connecting rod 423, which is far away from the corresponding bracket, is rotatably connected with the volute bracket 31 of the fan system 3, and the rotating shaft extends in the same direction as the rotating shaft of the roller 424. In the present embodiment, the connecting rod 423 at the front side of each bracket is rotatably connected with the front cover plate 311 of the volute housing 31, and the connecting rod 423 at the rear side of each bracket is rotatably connected with the rear cover plate 312 of the volute housing 31. Thus, the first support 421 and the second support 422 can rotate at a small angle relative to the volute casing 31.

The position of the limiting opening 411 of the guide rail 41 corresponds to each roller 424 of the bracket assembly 42 to realize matching, that is, the bracket assembly 42 is in a fixed state by clamping the roller 424 in the limiting opening 411, so as to realize the suspension and fixation of the fan system 3. The two upper limiting ports 411 are used for fixing the fan system 3 when the range hood normally works, and the lowest limiting port 411 is used for suspending and fixing the fan system 3 in a cleaning mode. The bottom end of the guide rail 41 forms a converging guide structure 414 to facilitate the loading of the roller 424. In this embodiment, the contraction guide structure 414 is a similar chamfer structure formed by inclining the bottom end of the guide rail 41 from bottom to top from the inner side wall close to the wind turbine frame 2 to the middle of the wind turbine frame 2.

Each guide rail 41 is preferably provided with a bearing block 412 protruding in the direction away from the fan system 3 at a position corresponding to the limiting opening 411, the fan frame 2 is provided with a mounting hole 21 at a position corresponding to the bearing block 412, and the bearing block 412 extends out of the fan frame 2 from the mounting hole 21 and is supported on the lower edge of the mounting hole 21, so that the gravity of the fan system 3 can be distributed to the fan frame 2.

The number of tie rods 43 corresponds to the number of bracket assemblies 42, each tie rod 43 extending in a longitudinal, preferably vertical direction, in this embodiment the tie rods 43 have two, one on each side of the front of the fan system 3. The pull rod 43 is located at the front side of the volute rack 31 of the fan system 3, the middle part of the connecting rod 423 on the corresponding first support 421 is rotatably connected with the pull rod 43, and the rotating shaft of the roller 424 extend in the same direction. Therefore, the two brackets of the bracket assembly 42, the connecting rod 423 and the volute housing 31 form a parallelogram four-bar linkage mechanism, and the rollers 424 on the two brackets are ensured to synchronously enter and exit the limiting opening 411. The bottom of the pull rod 43 is provided with a handle 431 for operation.

A first notch 316 which is depressed towards the middle of the volute casing frame 31 is formed at one of the left side and the right side of the volute casing frame 31 and the position corresponding to the first bracket 421, a second notch 317 which is depressed towards the middle of the volute casing frame 31 is formed at the other of the left side and the right side of the volute casing frame 31 and the position corresponding to the second bracket 422, the first bracket 421 can be inserted into the first notch 316, the second bracket 422 can be inserted into the second notch 317, the upper edge of the first notch 316 is supported on the first bracket 421, and the upper edge of the second notch 317 is supported on the second bracket 422. When the fan system 3 is in a static state, the mounting hole 21 of the fan frame 2 supports the guide rail 41, the limiting opening 411 of the guide rail 41 supports the roller 424, the roller 424 supports the corresponding brackets, and each bracket supports the whole volute frame 31 through the contact of the top surface and the volute frame 31 and the force on the connecting rod 423.

The blower frame 2 further includes an air outlet plate 22 located at the top, and an outlet 221 is formed on the air outlet plate 22 and corresponds to the blower air outlet 315 on the scroll frame 31. The outlet 221 of the air outlet plate 22 is provided with an annular first sealing gasket 222, the fan air outlet 315 of the volute frame 31 is provided with an annular second sealing gasket 33, the lower surface of the first sealing gasket 222 is in a sawtooth shape, the upper surface of the second sealing gasket 33 is in a sawtooth shape, during installation, the first sealing gasket 222 and the second sealing gasket 33 are assembled along the extending direction of the guide rail 41, the sawteeth are embedded into each other during matching, the air duct sealing performance in the fan frame 2 is ensured, and meanwhile, the first sealing gasket 222 and the second sealing gasket 33 can be simply separated. Alternatively, the lower surface of the first seal 222 and the upper surface of the second seal 33 may be engaged by other forms of concave-convex structures. Preferably, each seal is made of rubber.

Both sealing gaskets can extend to the position outside the fan air outlet 315, and teeth which are matched with each other and can be embedded are arranged on the position outside the fan air outlet 315, so that the assembling effect is ensured, and the dislocation of the two sealing gaskets is avoided.

Referring again to fig. 5 and 7, the fan system 3 further includes a flow guiding structure 34 disposed at the bottom of the volute housing 31, and the flow guiding structure 34 may be integrally formed with the volute housing 31. The flow guide structure 34 is substantially V-shaped and is formed at the lowest position near the guide rail 41 on one side of the axis of the impeller 32, and the grease flowing down from the scroll frame 31 and the impeller 32 can flow into the flow guide structure 34 and be collected at the lowest position. In the present embodiment, the lower left corner of the air guiding structure 34 is the lowest position. Meanwhile, the flow guide structure 34 can also guide the oil smoke.

The fan system 3 further includes an air inlet ring 35 disposed at the fan air inlet 314, an avoiding notch 318 is formed on the front cover plate 311 of the volute housing 31 adjacent to the fan air inlet 314, the avoiding notch 318 penetrates through the front cover plate 311 and faces the outside of the volute housing 31 and both sides of the volute housing 31, and the avoiding notch 318 is communicated with the fan air inlet 314. The air inlet ring 35 includes a ring-shaped body 351 and an extension piece 352 protruding from the outer periphery of the body 351, the extension piece 352 is shaped to match the avoiding notch 318, when the air inlet ring is installed, the body 351 of the air inlet ring 35 is installed at the fan air inlet 314, and the extension piece 352 is clamped into the avoiding notch 318.

Referring to fig. 8, in the operating state, the roller 424 is pushed toward the inside of the limiting opening 411 by the gravity of the fan system 3, so that the fan system 3 cannot descend by being pulled down directly. To pull down the fan system 3, it is necessary to push the fan system 3 up by about 5 mm and pull the pull rod 43 downward, at this time, the connecting rod 423 changes with the corresponding inclination angle of the bracket connected thereto, and the end of the connecting rod 423 where the roller 424 is disposed rotates downward, thereby rotating out of the limiting opening 411 on the guide rail 41, so that the bracket assembly 42 is in a moving state, and at the same time, the bearing block 412 is disengaged from the mounting hole 21, and the roller 424 can roll up and down along the guide rail 41. The design of the total thickness of the two sealing gaskets reaches more than 24 millimeters, and the sealing structure is guaranteed except that the two sealing gaskets are compressed by about 5 millimeters under the action of a hand push in order to guarantee the soft rubber material.

Referring to fig. 9 to 12, when the fan system 3 needs to be cleaned, a hand of a user passes through the air inlet 11 upwards to contact the handle 431 of the pull rod 43, so as to pull down the pull rod 43, so that the roller 424 is separated from the limiting opening 411, at this time, the roller 424 can roll downwards along the guide rail 41 until the roller 424 located above is clamped into the limiting opening 411 located at the lowest position, the fan system 3 passes through the air inlet 11 of the fume collecting hood 1 downwards and then is positioned again, and in this process, because the fan system 3 loses the support of the limiting opening 411 of the guide rail 41, the volute housing 31 needs to be manually supported to avoid falling. When the fan system 3 is positioned again, cleaning liquid is sprayed on the impeller 32, then the air inlet ring 35 can be removed, the brush 5 is installed on the extension piece 352, see fig. 11, then the air inlet ring 35 is installed back on the volute housing 31, and the brush 5 is inserted into the volute housing 31, and at least a part of the brush hairs of the brush 5 can contact with the blade 321 of the impeller 32, so that the blade 321 of the impeller 32 can be cleaned.

The cleaning mode of the fan system 3 is started to drive the impeller 32 to run at an ultra-low speed, so that semi-automatic cleaning of the impeller 32 is performed. Of course, the impeller 32 may be directly removed in a cleaning state and manually cleaned.

In order to avoid the dripping of the waste liquid after the cleaning of the impeller 32, the waste liquid collecting cup 6 can be installed at the lowest position of the bottom of the flow guide structure 34, the top of the waste liquid collecting cup 6 is open, and the waste liquid collecting cup is detachably connected with the flow guide structure 34 through the fasteners 61 on the front side and the rear side. The top of the waste liquid collecting cup 6 extends at least partly outside the flow guiding structure 34, in this embodiment to the left, so that the cleaning waste liquid flowing down the fan system 3 can be collected. Alternatively, the diversion structure 34 may be perforated at a position open to the waste collection cup 6 so that waste can pass through to be collected by the waste collection cup 6.

The range hood of the invention realizes the great improvement of the cleaning convenience of the fan system through the movable fan system 3. Since the fan system 3 needs to be lifted, the electric wire of the motor of the fan system 3 needs to be longer in the cleaning state than in the working state. In the working state, the part of the electric wire which is grown out can be stored in the fan frame 2 in a folding way in a cavity above the volute casing frame 31. In order to prevent the electric wire from being caught by the gasket, a wire hook, an elastic cord, and the like may be provided. The above features may employ conventional wire receiving and telescoping structures.

Claims

1. The utility model provides a range hood, includes collection petticoat pipe (1), sets up fan frame (2) and fan system (3) of setting in fan frame (2) in collection petticoat pipe (1) top, air intake (11) have been seted up on collection petticoat pipe (1), fan system (3) include volute frame (31) and impeller (32) of setting in volute frame (31), its characterized in that: the fan system (3) and the fan frame (2) are connected through a suspension device (4), the suspension device (4) comprises a guide rail (41) longitudinally arranged on the inner side wall of the fan frame (2) and a bracket assembly (42) arranged on the fan system (3), the bracket assembly (42) can be in a fixed state limited by the guide rail (41) and in a moving state separated from the guide rail (41), when the bracket assembly (42) is in the moving state, the fan system (3) can move along the extending direction of the guide rail (41) along with the bracket assembly (42) and can pass through an air inlet (11) of the smoke collecting hood (1), and therefore the fan system (3) can be suspended under the smoke collecting hood (1) for cleaning;

still be formed with fan air intake (314) on the spiral case frame (31) of fan system (3), fan air intake (314) department is provided with air intake circle (35), on spiral case frame (31), be formed with dodge breach (318) with fan air intake (314) adjacent department, dodge breach (318) and fan air intake (314) intercommunication, air intake circle (35) are including annular body (351) and by the outside outstanding extension piece (352) of the peripheral of body (351), the shape of extension piece (352) matches and can block in dodging breach (318) with dodging breach (318), extension piece (352) department can install and extend into in spiral case frame (31), be used for cleaning brush (5) of impeller (32).

2. The range hood of claim 1, wherein: the fan support assembly is characterized in that one side of the guide rail (41) facing the fan system (3) is recessed towards the direction far away from the fan system (3) to form a limiting opening (411), the limiting opening (411) is provided with at least two rollers (424) which are arranged at intervals up and down, the support assembly (42) comprises rollers (424) matched with the guide rail (41), and the rollers (424) are clamped into the limiting opening (411) to be in a fixed state or separated from the limiting opening (411) to be in a moving state.

3. The range hood of claim 2, wherein: bracket component (42) still includes connecting rod (423), gyro wheel (424) rotate with connecting rod (423) and are connected, connecting rod (423) still rotate with spiral case frame (31) of fan system (3) and be connected, and can drive gyro wheel (424) and rotate in order to block in or break away from spacing mouthful (411) relatively guide rail (41), the axis of rotation of connecting rod (423) is unanimous with the axis of rotation extending direction of gyro wheel (424).

4. The range hood of claim 3, wherein: the support assembly (42) further comprises a support which is arranged on the side face of the volute frame (31) and used for supporting the volute frame (31) of the fan system (3), one end of the connecting rod (423) is connected with the support into a whole, the other end of the connecting rod is connected with the volute frame (31), and the roller (424) is arranged at the connecting position of the support and the connecting rod (423).

5. The range hood of claim 4, wherein: the volute casing frame (31) comprises a front cover plate (311) and a rear cover plate (312), the support extends between the front cover plate (311) and the rear cover plate (312), a connecting rod (423) on one side of the support is rotatably connected with the front cover plate (311) of the volute casing frame (31), a connecting rod (423) on the other opposite side of the support is rotatably connected with the rear cover plate (312) of the volute casing frame (31), a notch which is sunken towards the middle of the volute casing frame (31) is formed in a position, corresponding to the support, of the volute casing frame (31), the support can be inserted into the corresponding notch, and the upper edge of the notch is supported on the corresponding support, so that the support supports the volute casing frame (31).

6. The range hood of claim 5, wherein: guide rail (41) have four, per two guide rail (41) become one set, arrange respectively in fan frame (2) the position that corresponds, and two guide rail (41) of same group are located the both sides of impeller (32) axis, guide rail (41) have the front and back interval arrangement two sets ofly, and each group guide rail (41) correspond a set of support, and two guide rail (41) in the front and back that are located impeller (32) axis homonymy correspond the both sides of same support respectively.

7. The range hood of claim 5, wherein: the support comprises a first support (421) and a second support (422) which respectively extend between a front cover plate (311) and a rear cover plate (312), the first support (421) is positioned above the second support (422), the suspension device (4) further comprises a pull rod (43), the pull rod (43) extends in the longitudinal direction, the middle of each connecting rod (423) is rotatably connected with the pull rod (43), and the first support (421), the second support (422), the connecting rods (423) and the volute rack (31) form a four-bar mechanism; the notches include a first notch (316) corresponding to the first bracket (421) and a second notch (317) corresponding to the second bracket (422).

8. The range hood of claim 2, wherein: the guide rail (41) is further provided with a bearing block (412) protruding towards the direction far away from the fan system (3), a mounting hole (21) is formed in the position, corresponding to the bearing block (412), of the fan frame (2), and the bearing block (412) extends out of the fan frame (2) from the mounting hole (21) and is supported on the lower edge of the mounting hole (21).

9. The range hood of any one of claims 1~8, wherein: fan frame (2) are still including air outlet plate (22) that are located the top, export (221) have been seted up on air outlet plate (22), still be formed with fan air outlet (315) on spiral case frame (31) of fan system (3), export (221) correspond with fan air outlet (315), export (221) department is provided with annular first sealed pad (222), fan air outlet (315) department is provided with annular second sealed pad (33), the lower surface of first sealed pad (222) is the cockscomb structure, the upper surface of second sealed pad (33) is the cockscomb structure with first sealed pad (222) adaptation.

10. The range hood of any one of claims 1~8, wherein: the fan system (3) further comprises a flow guide structure (34) arranged at the bottom of the volute frame (31).

11. The range hood of claim 10, wherein: the bottom of the diversion structure (34) is detachably connected with a waste liquid collecting cup (6) used for receiving waste liquid flowing down from the diversion structure (34).