CN216306346U - Cleaning mechanism, fan cleaning device with same and range hood - Google Patents

Abstract

The utility model discloses a cleaning mechanism, a fan cleaning device and a range hood applying the cleaning mechanism, wherein the cleaning mechanism comprises a nozzle and a fixed support used for being fixed with an external cleaning object, and is characterized in that: the nozzle can move linearly in a first direction and a second direction relative to the fixed support, the first direction and the second direction form an angle with each other, the nozzle extends in the second direction, and the movement of the nozzle in the second direction enables the nozzle to be close to or far away from a cleaning object. Compared with the prior art, the utility model has the advantages that: the cleaning range can be larger by moving the nozzle in at least two dimensions, and the spraying area is changed by changing the distance between the nozzle and the cleaning object, so that the cleaning mode is adjusted, and the cleaning requirement is met.

Description

Cleaning mechanism, fan cleaning device with same and range hood

Technical Field

The utility model relates to cleaning equipment, in particular to a cleaning mechanism, a fan cleaning device applying the cleaning mechanism and a range hood applying the fan cleaning device.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

With the continuous progress of the self-cleaning technology of the range hood, steam cleaning or water cleaning is widely applied to the field of self-cleaning of the range hood, and the basic principle is that a steam generator generates steam or water is pumped by a water pump to convey the steam or water to a nozzle at the tail end of a spray pipe, and the steam or water is quickly sprayed out from the nozzle to flush an impeller and a volute for cleaning. At present, a fixed hole is generally formed on a spray pipe, the number of the holes is generally more than 3, but the cleaning mode has the following defects: firstly, during cleaning, steam or water is sprayed out from fixed nozzles, and due to the limited nozzles, the washing force at the intervals among the nozzles is weak, and the cleaning effect is poor; secondly, because the number of the holes is large and the power of the steam generator or the pump is constant, the steam pressure or the water pressure from the nozzle is correspondingly low and unstable, and the cleaning effect is poor; thirdly, for the fan of two air intakes, can only wash the anterior position of impeller center, the position at the unable contact impeller center rear portion of nozzle, the washing scope receives the restriction.

To this end, the present application improves on this by using a moving nozzle for cleaning. The cleaning device for the fan system of the range hood, disclosed in chinese patent application No. 201711480573.9, is located outside the fan of the range hood, the fan includes a volute having an air outlet and an impeller disposed in the volute, the cleaning device includes a nozzle, the range hood further includes a first driving mechanism, an opening is disposed on the volute, an outlet of the nozzle faces the opening, and the nozzle moves along a length direction of the opening under the driving of the first driving mechanism.

Although the cleaning device can move horizontally, the expansion of the cleaning range is limited, the moving structure of the cleaning device is exposed in a range hood, the moving mechanism is easy to have the condition of movement failure after oil stains are adhered, the cleaning function is influenced, and the oil stains on the impeller are also uneven in distribution, so that the targeted cleaning cannot be realized.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide a cleaning mechanism capable of expanding the cleaning range, in order to overcome the above-mentioned disadvantages of the prior art.

The second technical problem to be solved by the utility model is to provide a fan cleaning device applying the cleaning mechanism.

The third technical problem to be solved by the utility model is to provide a range hood with the fan cleaning device.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a cleaning mechanism comprises a nozzle and a fixed bracket used for being fixed with an external cleaning object, and is characterized in that: the nozzle can move linearly in a first direction and a second direction relative to the fixed support, the first direction and the second direction form an angle with each other, the nozzle extends in the second direction, and the movement of the nozzle in the second direction enables the nozzle to be close to or far away from a cleaning object.

In order to limit the movement path of the nozzle conveniently, a through hole extending along a first direction is formed in the fixing support, the nozzle penetrates through the through hole, the cleaning mechanism further comprises a first movement mechanism used for driving the nozzle to move linearly along the through hole, and the first movement mechanism is a linear driving module.

In order to drive the nozzle to move in the first direction, the first movement mechanism comprises a first motor and a first screw rod, the first screw rod extends along the first direction, the first motor drives the first screw rod to rotate around the axis of the first screw rod, the first screw rod can be directly or indirectly in threaded connection with the nozzle, and the first screw rod is at least partially positioned in the through hole of the fixed support.

In order to guide the movement of the nozzle in the first direction, the first movement mechanism further comprises a first guide rod extending in the first direction, the first guide rod being slidably connected to the nozzle directly or indirectly to enable the nozzle to move relative to the first guide rod in the first direction, the first guide rod being at least partially located in the through hole of the fixed bracket.

According to one aspect of the utility model, the cleaning mechanism further comprises a second motion mechanism capable of driving the nozzle to move linearly in a second direction, and the second motion mechanism is a linear driving module.

Preferably, for the convenience of setting up two motion, conveniently drive the nozzle, wiper mechanism still includes the motion board with fixed bolster interval arrangement, the output and the motion board of second motion are connected to can drive the motion board and be close to or keep away from the fixed bolster along the second direction, the spout has been seted up to the one end of nozzle, the other end that the nozzle is relative and motion board butt, thereby the motion board can drive the nozzle and be close to the cleaning object, the nozzle keeps away from the trend of cleaning object.

Preferably, in order to facilitate driving the nozzle to move in the second direction, the second moving mechanism includes a second motor and a second lead screw, the second lead screw extends along the second direction, the second motor drives the second lead screw to rotate around its axis, and the second lead screw can be directly or indirectly screwed with the moving plate.

In order to guide the movement of the nozzle in the second direction, the second movement mechanism further includes a second guide bar extending in the second direction, the second guide bar being slidably coupled to the moving plate directly or indirectly so as to allow the moving plate to move relative to the second guide bar in the second direction.

In order to facilitate the resetting of the nozzle after the work is finished, the nozzle is directly or indirectly connected with the fixed support through the nozzle fixing frame, the nozzle is in sliding connection with the nozzle fixing frame and can move relatively in the second direction, the periphery of the part of the nozzle between the fixed support and the nozzle is provided with a tension spring, a position of the periphery of the nozzle close to the nozzle can be provided with a limiting check ring, and two ends of the tension spring are respectively abutted against the limiting check ring and the nozzle fixing frame, so that the nozzle keeps away from the trend of a cleaning object.

In order to increase the cleaning range, the nozzle can also swing relative to the fixed support, the axis of the swing extends along a third direction, and the first direction, the second direction and the third direction form an angle with each other pairwise.

Preferably, in order to ensure uniform cleaning in all directions, the first direction, the second direction and the third direction are perpendicular to each other.

In order to increase the cleaning range, the nozzle can also swing relative to the fixed support, the axis of the swing extends along a third direction, and the first direction, the second direction and the third direction form an angle with each other pairwise;

in order to simplify the structure, a separate motion mechanism is not arranged to drive the nozzle to swing, a guide groove is arranged on one side, facing the nozzle, of the motion plate, the guide groove is formed by sinking one side, facing the nozzle, of the motion plate in a direction away from the nozzle, one end, far away from the nozzle, of the nozzle is slidably arranged in the guide groove, the guide groove extends along the first direction, and the width of the guide groove is matched with that of the end of the nozzle;

the cleaning mechanism further comprises a nozzle support and a nozzle fixing frame, the nozzle fixing frame can be rotatably arranged in the nozzle support, the nozzle support and the nozzle synchronously move along a first direction, and the guide groove fluctuates along a third direction, so that the nozzle can swing relative to the nozzle support together with the nozzle fixing frame when moving along the first direction.

According to another aspect of the present invention, the cleaning mechanism further includes a moving plate fixedly disposed on a side of the fixing bracket away from the cleaning object, a side of the moving plate facing the nozzle is provided with a guide groove formed by recessing a side of the moving plate facing the nozzle in a direction away from the nozzle, an end of the nozzle is slidably disposed in the guide groove, the guide groove extends in a first direction, and a distance between the guide groove and the fixing bracket is not completely equal along an extending direction of the guide groove.

Preferably, the guide groove has a wave shape undulating in the second direction.

The technical scheme adopted by the utility model for solving the second technical problem is as follows: a fan cleaning device to which the cleaning mechanism as described above is applied, including a fan system as a cleaning object, the fan system including a scroll casing and an impeller provided in the scroll casing, characterized in that: the cleaning mechanism is arranged on the outer side of the volute, and the first direction is parallel to the axial direction of the impeller.

In order to facilitate the nozzle to spray and clean the interior of the volute, the volute comprises a ring wall, a first through hole is formed in the ring wall, the first through hole extends along the direction parallel to the axial direction of the impeller, and the nozzle can be close to or penetrate through the first through hole when moving in the second direction.

Preferably, in order to facilitate the sealing of the volute after the cleaning is finished and avoid influencing the working state of the volute, the cleaning mechanism further comprises an elastic blocking piece arranged on one side of the first through hole facing the outside of the volute, a second through hole penetrating through the blocking piece is formed in the blocking piece, and the aperture of the second through hole is smaller than the outer diameter of the nozzle.

In order to avoid oil stains and the like from blocking the first through hole, the cleaning mechanism further comprises a shell fixed with the volute, the fixed support is fixedly arranged in the shell, and the shell covers the first through hole.

In order to facilitate the supply of the cleaning medium to the nozzle while avoiding interference with the movement of the nozzle, a first pipe connection is provided on the nozzle, a second pipe connection is provided on the housing for connection to an external source of cleaning medium, and the first pipe connection and the second pipe connection are connected by a hose so that the nozzle is in fluid communication with the external source of cleaning medium.

The technical scheme adopted by the utility model for solving the third technical problem is as follows: a range hood, its characterized in that: the fan cleaning device as described above is applied.

Compared with the prior art, the utility model has the advantages that: the cleaning range can be larger by moving the nozzle in at least two dimensions, and the spraying area is changed by changing the distance between the nozzle and a cleaning object, so that the cleaning mode is adjusted, and the cleaning requirement is met; through making the nozzle swing on the third dimension, can further enlarge the washing scope, improve the cleaning performance.

Drawings

FIG. 1 is a schematic view of a cleaning apparatus according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a first embodiment of the cleaning device of the present invention showing a housing concealing a cleaning mechanism;

FIG. 3 is a schematic view of a hidden cleaning mechanism of the cleaning device according to the first embodiment of the present invention;

FIG. 4 is a schematic view of a hidden baffle of the cleaning device according to the first embodiment of the present invention;

FIG. 5 is a schematic view of a baffle of a cleaning device according to a first embodiment of the present invention;

FIG. 6 is a schematic view of a hidden housing of a cleaning mechanism of the cleaning device according to the first embodiment of the present invention;

FIG. 7 is a partial schematic view of a cleaning mechanism of the cleaning apparatus according to the first embodiment of the present invention;

FIG. 8 is a schematic view of a moving plate of a cleaning mechanism of the cleaning apparatus according to the first embodiment of the present invention;

FIG. 9 is a schematic view of a nozzle of a cleaning mechanism of the cleaning apparatus according to the first embodiment of the present invention;

FIG. 10 is a schematic view of a hidden housing of a cleaning mechanism of a cleaning device according to a second embodiment of the present invention;

fig. 11 is a schematic view of a shutter of a cleaning mechanism of a cleaning apparatus according to a second 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 "central," "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 orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to 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 and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction opposite to 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.

Example one

Referring to fig. 1 to 4, a fan cleaning device includes a fan system 1 and a cleaning mechanism 2, where the fan system 1 is a centrifugal fan, and is applied to a range hood in this embodiment, alternatively, the fan system 1 may also be applied to any other occasions requiring such a power device.

The fan system 1 includes a volute 11 and an impeller 12 disposed in the volute 11, the volute 11 includes two cover plates 111 (only one of the cover plates 111 can be seen in the figure, and the other cover plate is disposed approximately parallel thereto) arranged at intervals, and an annular wall 112 located between the two cover plates 111, and an air inlet 113 is opened on the cover plate 111. The structure of the fan system 1 is the same as that of the prior art, and is not described herein again.

The annular wall 112 of the volute 11 is provided with a first through hole 114, and the first through hole 114 extends along a direction parallel to the axial direction of the impeller 12, so as to form a long-strip-shaped hole.

The cleaning mechanism 2 is disposed outside the volute 11 and includes an elastic baffle 21 disposed on a side of the first through hole 114 facing the outside of the volute 11, and preferably, the baffle 21 is made of rubber and can achieve a certain deformation. The cleaning mechanism 2 further includes a housing 22 fixed to the volute 11, and the housing 22 may be rectangular and fixed to a cover plate 111 of the volute 11. The housing 22 is disposed adjacent to the annular wall 112 and faces a side of the annular wall 112 of the volute 11, the housing 22 enclosing the first perforation 114 and the baffle 21.

Referring to fig. 2, 6 to 9, the cleaning mechanism 2 further includes a fixing bracket 23 fixedly disposed in the housing 22 and a nozzle 24 movably disposed on the fixing bracket 23, the fixing bracket 23 may preferably have a flat plate shape, and the length direction of the fixing bracket 23 is the same as that of the stopper 21. A certain gap is formed between the fixing bracket 23 and the baffle 21. The fixing bracket 23 is provided with a through hole 231, the through hole 231 extends along a direction parallel to the axial direction of the impeller 12 (the axial direction of the impeller 12 or the direction parallel to the axial direction of the impeller 12 is the first direction X), and the through hole 231 penetrates through the fixing bracket 23 towards one side of the blocking piece 21 and one side far away from the blocking piece 21. The nozzle 24 is disposed on the fixing bracket 23 by a nozzle bracket 25, and the nozzle bracket 25 is linearly reciprocated along the through-hole 231. One end of the nozzle 24 is close to the baffle 21 and extends away from the baffle 21, preferably, the nozzle 24 and the baffle 21 are perpendicular to each other, and the extending direction of the nozzle 24 is the second direction Y. The nozzle 24 has a nozzle 241 at an end thereof adjacent to the baffle 21, the nozzle 241 facing the volute 11. The baffle 21 is provided with a second through hole 211 penetrating through the baffle 21, and the aperture of the second through hole 211 is smaller than the outer diameter of the nozzle 24.

The nozzle 24 is a hollow structure having a first adapter 244 disposed thereon, the first adapter 244 being in fluid communication with the spout 241. The outer side wall of the housing 22 is provided with a second pipe joint 221, the first pipe joint 244 and the second pipe joint 221 are connected and in fluid communication through a hose (not shown), and the second pipe joint 221 is used for communicating with a cleaning medium source such as a cleaning water source, so that the cleaning medium such as water or cleaning agent can be delivered to the nozzle 24 and ejected from the nozzle 241.

The cleaning mechanism 2 further includes a nozzle holder 26, the nozzles 24 penetrate the nozzle holder 26 and are fixedly coupled to each other, and the nozzle holder 26 is rotatably provided in the nozzle holder 25 by a rotation shaft 261, the rotation shaft 261 extending in a direction parallel to the axial direction of the impeller 12. The rotary shaft 261 may be fixed to the nozzle holder 26 and rotatably connected to the nozzle holder 25, or the rotary shaft 261 may be rotatably connected to the nozzle holder 26 and fixed to the nozzle holder 25, as long as the nozzle holder 26 is rotatable in a direction parallel to the axial direction of the impeller 12.

The cleaning mechanism 2 further comprises a first motion mechanism for driving the nozzle holder 25 to move, wherein the first motion mechanism is a linear driving module and comprises a first motor 271, a first lead screw 272, a first guide rod 273 and a motor holder 274. The first lead screw 272 and the first guide lever 273 each extend in a direction parallel to the axial direction of the impeller 12. One end of the first lead screw 272 is directly or indirectly connected with the output end of the first motor 271, so that the first motor 271 can drive the first lead screw to rotate around the axis of the first lead screw. The first motor 271 is fixed on the outer side of the housing 22 through the motor bracket 274, and the output end of the first motor 271 extends into the housing 22 and is connected with the first lead screw 272. The first screw 272 passes through the nozzle holder 25 and is screwed, and the screw may be screwed by forming a hole in the nozzle holder 25 and forming an internal thread on a wall of the hole to be screwed with the first screw 272, or by providing a nut in the hole. The internal thread or the nut serves as an output end of the first movement mechanism. Thus, when the first lead screw 272 rotates, the nozzle holder 25 may move along the axis of the first lead screw 272. While the first guide lever 273 also passes through the nozzle holder 25 so that the nozzle holder 25 can move in the first direction X with respect to the first guide lever 273, whereby the first guide lever 273 can guide the movement of the nozzle holder 25. The first lead screw 272 and the first guide lever 273 are each at least partially located in the through hole 231 of the fixing bracket 23.

In the present embodiment, the first lead screw 272 and the first guide lever 273 are both coupled through the nozzle holder 25, and alternatively, may be directly coupled with the nozzle 24 without providing the nozzle holder 25, as long as the nozzle 24 has a convex portion to facilitate the penetration or coupling, whereby only the nozzle holder 26 may be provided such that the nozzle holder 26 is rotatably coupled with the fixed holder 23, in which a slit extending in the first direction X is formed, along which the nozzle 24 moves.

The cleaning mechanism 2 further includes a moving plate 28 and a second moving mechanism for driving the moving plate 28 to move, which is provided on a side of the fixed bracket 23 away from the annular wall 113 of the scroll casing 11, and is movable in the extending direction of the nozzle 24 close to or away from the fixed bracket 23. Preferably, the kinematic plate 28 is rectangular in shape. The second motion mechanism is also a linear driving module, and includes a second motor 291, a second lead screw 292, and a second guide rod 293, the second motor 291 is fixedly disposed on the fixing bracket 23, and the second lead screw 292 and the second guide rod 293 both extend in the same direction as the nozzle 24. The output of the second motor 291 is directly or indirectly connected to the second lead screw 292, such that the second lead screw 292 is rotatable about its own axis. The second lead screw 292 is passed through the moving plate 28 and screwed, and like the nozzle holder 25, the screw connection with the second lead screw 292 may be achieved by forming a hole in the moving plate 28 and forming an internal thread on the wall of the hole, or by providing a nut in the hole. The internal thread or the nut serves as an output end of the second movement mechanism. Thus, when the second lead screw 292 is rotated, the moving plate 28 can be moved in the extending direction of the nozzle 24. Meanwhile, the second guide rod 293 passes through the moving plate 28 and can move relatively in the second direction Y, so as to guide the movement of the moving plate 28.

The end of the nozzle 24 far from the baffle 21 is movably connected to the moving plate 28, the side of the moving plate 28 facing the nozzle 24 is provided with a guide slot 281, the guide slot 281 is formed by the side of the moving plate 28 facing the nozzle 24 being recessed in the direction far from the nozzle 24, and the end of the nozzle 24 can abut against the guide slot 281 and can slide along the guide slot 281. The guide groove 281 extends between both ends of the moving plate 28, where both ends of the moving plate 28 refer to both ends in a direction parallel to the axial direction of the impeller 12. The guide grooves 281 may be linear or, as shown in the present invention, have a shape of a wavy line, see fig. 8, which undulates along a third direction Z, and the first direction X, the second direction Y, and the third direction Z are angled with respect to each other, preferably perpendicular to each other.

A tension spring 242 is provided around the periphery of nozzle 24 between nozzle holder 26 and spout 241 to maintain the tendency of nozzle 24 to move away from flap 21. A limit stop 243 may be provided on the outer periphery of the nozzle 24 near the spout 241 so that one end of the tension spring 242 may abut the limit stop 243. Other known resilient members may be used to maintain the tendency of the nozzle 24 to move away from the flap 21.

The housing 22 prevents cooking fumes from entering the interior of the housing 22 and affecting the movement of the various moving parts.

Thus, the nozzle 24 can move in a direction parallel to the axial direction of the impeller 12 by driving the nozzle holder 25 by the first movement mechanism, and since the end of the nozzle 24 is restricted by the guide groove 281 of the movement plate 28, it is swung relative to the nozzle holder 25 by the nozzle holder 26 during the movement of the nozzle 24, thereby increasing the cleaning range of the impeller 12 (especially, the blades of the impeller 12) by the nozzle 24.

The moving plate 28 can move close to or away from the fixed bracket 23 by being driven by the second moving mechanism, the moving of the moving plate 28 can drive the nozzle 24 to move close to or through the first through hole 114, the moving of the nozzle 24 can switch between precise cleaning and large-area washing, when the nozzle 24 is closer to the impeller 12 (especially to the blades of the impeller 12), the nozzle can be used for precise cleaning, and when the nozzle 24 is farther from the impeller 12 (especially to the blades of the impeller 12), the area of the spray impacting the impeller 12 (especially to the blades of the impeller 12) can be increased, and the pollutants washed off in the previous stage can be washed away.

When the nozzle 24 passes through the second through hole 211 of the flap 21 during cleaning, the flap 21 is deformed at the second through hole 211, and the nozzle 24 can apply the cleaning solution to the impeller 12 (especially to the blades of the impeller 12) while the tension spring 242 is compressed. After the cleaning is finished, the moving plate 28 can be controlled to move towards the direction away from the fixed bracket 23, the nozzle 24 can be away from the baffle 21 under the action of the tension spring 242, the nozzle 24 exits from the volute 11, the deformation of the baffle 21 is recovered, and the first through hole 114 on the volute 11 can be blocked.

In the present embodiment, the nozzle 24 performs a linear motion in the first direction X and the second direction Y, and a swing motion in the third direction Z, and performs a three-dimensional motion as a whole.

Example two

Referring to fig. 10 and 11, in the present embodiment, the difference from the first embodiment is that the second moving mechanism is not provided, and the moving plate 28 is not a flat plate. The moving plate 28 is fixedly disposed within the casing 22, and the distance between the moving plate 28 and the fixed bracket 23 in the axial direction of the impeller 12 is not exactly equal. As in the present embodiment, the cross section of the moving plate 28 (and the guide groove 281 as well) is wavy, and the wavy undulation undulates in the second direction Y.

When the nozzle 24 moves along the through-hole 231, it is also moved toward and away from the stopper 21 by the guide groove 281 of the moving plate 28. When the washing is completed, the nozzle 24 is controlled to move to a position where the guide groove 281 is farthest away from the fixing bracket 23, and the nozzle 24 is withdrawn from the scroll casing 11.

In the present embodiment, the nozzle 24 performs linear movement in the first direction X and the second direction Y, and the whole moves in two dimensions.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion and/or be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third element, such as a fluid channel, e.g., a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow through, or a combination thereof.

Claims (20)

1. A cleaning mechanism including a nozzle (24) and a fixing bracket (23) for fixing with an external cleaning object, characterized in that: the nozzle (24) is linearly movable relative to the stationary support (23) in a first direction (X) and a second direction (Y) which are at an angle to each other, the nozzle (24) extending in the second direction (Y), the movement of the nozzle (24) in the second direction (Y) enabling the nozzle (24) to approach or depart from the cleaning object.

2. The cleaning mechanism of claim 1, wherein: the cleaning mechanism is characterized in that a through hole (231) extending along a first direction (X) is formed in the fixed support (23), the nozzle (24) penetrates through the through hole (231), the cleaning mechanism further comprises a first movement mechanism used for driving the nozzle (24) to move linearly along the through hole (231), and the first movement mechanism is a linear driving module.

3. The cleaning mechanism of claim 2, wherein: the first motion mechanism comprises a first motor (271) and a first screw rod (272), the first screw rod (272) extends along a first direction (X), the first motor (271) drives the first screw rod (272) to rotate around the axis of the first screw rod, the first screw rod (272) can be directly or indirectly in threaded connection with the nozzle (24), and the first screw rod (272) is at least partially positioned in a through hole (231) of the fixed support (23).

4. The cleaning mechanism of claim 2, wherein: the first moving mechanism further comprises a first guide lever (273), the first guide lever (273) extending along the first direction (X), the first guide lever (273) being slidably coupled to the nozzle (24) directly or indirectly to allow the nozzle (24) to move relative to the first guide lever (273) in the first direction (X), the first guide lever (273) being at least partially disposed in the through hole (231) of the stationary bracket (23).

5. The cleaning mechanism according to any one of claims 1 to 4, wherein: the cleaning mechanism further comprises a second movement mechanism which can drive the nozzle (24) to move linearly in a second direction (Y), and the second movement mechanism is a linear driving module.

6. The cleaning mechanism of claim 5, wherein: the cleaning mechanism further comprises a moving plate (28) arranged at intervals with the fixing support (23), the output end of the second moving mechanism is connected with the moving plate (28), so that the moving plate (28) can be driven to be close to or far away from the fixing support (23) along the second direction (Y), a nozzle (241) is formed in one end of the nozzle (24), the other end, opposite to the nozzle (24), of the nozzle is abutted to the moving plate (28), the moving plate (28) can drive the nozzle (24) to be close to a cleaning object, and the nozzle (24) keeps a trend of being far away from the cleaning object.

7. The cleaning mechanism of claim 6, wherein: the second movement mechanism comprises a second motor (291) and a second screw rod (292), the second screw rod (292) extends along the second direction (Y), the second motor (291) drives the second screw rod (292) to rotate around the axis of the second screw rod, and the second screw rod (292) can be directly or indirectly in threaded connection with the movement plate (28).

8. The cleaning mechanism of claim 6, wherein: the second movement mechanism further comprises a second guide rod (293), the second guide rod (293) extends along the second direction (Y), the second guide rod (293) can be directly or indirectly connected with the movement plate (28) in a sliding mode, and the movement plate (28) can move relative to the second guide rod (293) in the second direction (Y).

9. The cleaning mechanism of claim 6, wherein: the nozzle (24) is directly or indirectly connected with the fixed support (23) through the nozzle fixing frame (26), the nozzle (24) is in sliding connection with the nozzle fixing frame (26) and can move relatively in the second direction (Y), a tension spring (242) is arranged on the periphery of the part, located between the fixed support (23) and the nozzle opening (241), of the nozzle (24), a limiting check ring (243) can be arranged at the position, close to the nozzle opening (241), of the periphery of the nozzle (24), and two ends of the tension spring (242) are respectively abutted against the limiting check ring (243) and the nozzle fixing frame (26), so that the nozzle (24) keeps away from the trend of a cleaning object.

10. The cleaning mechanism according to any one of claims 1 to 4, wherein: the nozzle (24) can also swing relative to the fixed support (23), the axis of the swing extends along a third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) form an angle with each other pairwise.

11. The cleaning mechanism of claim 10, wherein: the first direction (X), the second direction (Y) and the third direction (Z) are vertical to each other.

12. The cleaning mechanism of claim 6, wherein: the nozzle (24) can also swing relative to the fixed support (23), the axis of the swing extends along a third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) form an angle with each other pairwise;

a guide groove (281) is formed in one side, facing the nozzle (24), of the moving plate (28), the guide groove (281) is formed by sinking one side, facing the nozzle (24), of the moving plate (28) to a direction far away from the nozzle (24), one end, far away from the nozzle (241), of the nozzle (24) is slidably arranged in the guide groove (281), the guide groove (281) extends along the first direction (X), and the width of the guide groove (281) is matched with the end part of the nozzle (24);

the cleaning mechanism further comprises a nozzle support (25) and a nozzle fixing frame (26), the nozzle fixing frame (26) is rotatably arranged in the nozzle support (25), the nozzle support (25) and the nozzle (24) synchronously move along the first direction (X), and the guide groove (281) undulates along the third direction (Z) so that the nozzle (24) and the nozzle fixing frame (26) can swing relative to the nozzle support (25) when moving along the first direction (X).

13. The cleaning mechanism according to any one of claims 1 to 4, wherein: the cleaning mechanism further comprises a moving plate (28) fixedly arranged on one side, far away from a cleaning object, of the fixing support (23), a guide groove (281) is formed in one side, facing the nozzle (24), of the moving plate (28), the guide groove (281) is formed by sinking one side, facing the nozzle (24), of the moving plate (28) towards the direction far away from the nozzle (24), the end portion of the nozzle (24) is slidably arranged in the guide groove (281), the guide groove (281) extends along the first direction (X), and the distance between the guide groove (281) and the fixing support (23) is not equal completely along the extending direction of the guide groove (281).

14. The cleaning mechanism of claim 13, wherein: the guide groove (281) is waved in a second direction (Y).

15. A fan cleaning device to which a cleaning mechanism according to any one of claims 1 to 14 is applied, comprising a fan system (1) as a cleaning object, the fan system (1) including a volute (11) and an impeller (12) provided in the volute (11), characterized in that: the cleaning mechanism is arranged on the outer side of the volute (11), and the first direction (X) is parallel to the axial direction of the impeller (12).

16. The fan cleaning apparatus according to claim 15, wherein: the volute (11) comprises an annular wall (112), a first through hole (114) is formed in the annular wall (112), the first through hole (114) extends along the direction parallel to the axial direction of the impeller (12), and the nozzle (24) can be close to or penetrate through the first through hole (114) when moving in the second direction (Y).

17. The fan cleaning apparatus according to claim 16, wherein: the cleaning mechanism further comprises an elastic baffle sheet (21) arranged on one side, facing the outside of the volute (11), of the first through hole (114), a second through hole (211) penetrating through the baffle sheet (21) is formed in the baffle sheet (21), and the aperture of the second through hole (211) is smaller than the outer diameter of the nozzle (24).

18. The fan cleaning apparatus according to claim 16, wherein: the cleaning mechanism further comprises a shell (22) fixed with the volute (11), the fixed support (23) is fixedly arranged in the shell (22), and the shell (22) covers the first through hole (114).

19. The fan cleaning apparatus according to claim 18, wherein: the nozzle (24) is provided with a first pipe joint (244), the housing (22) is provided with a second pipe joint (221) for connecting with an external cleaning medium source, and the first pipe joint (244) and the second pipe joint (221) are connected through a hose so that the nozzle (24) is communicated with the external cleaning medium source in a fluid mode.

20. A range hood, its characterized in that: use of a fan cleaning device according to any of claims 15 to 19.

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