CN212005855U - A belt cleaning device and range hood for range hood - Google Patents

Abstract

The utility model provides a range hood's belt cleaning device belongs to the household electrical appliances field. The range hood includes the spiral case and installs the impeller in the spiral case, belt cleaning device includes: the spray pipe assembly comprises a front spray pipe and a rear spray pipe, the front spray pipe extends into the volute cavity from the front air inlet end of the volute, and the rear spray pipe extends into the volute cavity from the rear air inlet end of the volute; and the steam generator is connected with the spray pipe assembly to supply steam cleaning medium, so that no dead angle is formed, the cleaning at the shielding position is avoided, the front spray pipe control valve and the rear spray pipe control valve are set, more efficient and intelligent cleaning is realized, the cleaning efficiency is accelerated, the cleaning time is shortened, and the high-efficiency and high-quality requirements of users are met.

Description

A belt cleaning device and range hood for range hood

Technical Field

The utility model relates to a household electrical appliances field, more specifically relates to a belt cleaning device and range hood for range hood.

Background

In the use of range hood, can accumulate a large amount of greasy dirt on impeller and the filter screen, the user need dismantle range hood when wasing, wastes time and energy and make dirty the clothing very easily, and artifical cleaning performance is often unsatisfactory. With the development of the cleaning technology of the range hood, the self-cleaning technology comes along, and the automatic cleaning of the range hood is realized in a mode of automatically cleaning the impeller.

The existing self-cleaning technology adopts a nozzle to wash an impeller, but because the position of oil stains is uncertain, the nozzle is cleaned in a fixed mode, and a dead angle area easily exists in the cleaning process, so that the cleaning is not thorough, and therefore, the cleaning device of the existing range hood is to be further improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a belt cleaning device for range hood for carry out more thorough self-cleaning to range hood.

In order to achieve the above object, the utility model discloses a first aspect provides a belt cleaning device for range hood, range hood includes the spiral case and installs the impeller in the spiral case, and belt cleaning device includes: the spray pipe assembly comprises a front spray pipe and a rear spray pipe, the front spray pipe extends into the volute cavity from the front air inlet end of the volute, and the rear spray pipe extends into the volute cavity from the rear air inlet end of the volute; and a steam generator connected to the nozzle assembly to supply the steam cleaning medium.

In an embodiment of the present invention, the nozzle extension end of the nozzle assembly extends into the inner side of the inner circumference of the impeller, and the nozzle extension end is provided with the axial nozzle hole and the circumferential nozzle hole which are arranged relative to the impeller

In the embodiment of the utility model provides an in, the circumference orifice efflux of circumference orifice is towards the perisporium of the interior circumference of impeller, and the axial orifice efflux of axial orifice is towards the blade inner concave surface of impeller.

In an embodiment of the present invention, the nozzle assembly further includes: the front spray pipe control valve is used for controlling the front spray pipe; and the rear spray pipe control valve is used for controlling the rear spray pipe.

The embodiment of the utility model provides an in, the spray tube subassembly still includes the three-way pipe, and preceding spray tube and back spray tube are connected respectively to two branches way of three-way pipe, and steam generator's steam outlet end is connected to the main tributary way of three-way pipe.

The embodiment of the utility model provides an in, the three-way pipe sets up on the periphery wall of spiral case and two exit ends extend around respectively towards.

In the embodiment of the present invention, the steam generator is disposed on the top plate of the frame of the range hood and connected to the volute below the top plate through the nozzle assembly

The embodiment of the utility model provides an in, belt cleaning device still includes the controller, preceding spray tube control flap and the equal electric connection controller of back spray tube control flap.

The utility model discloses an on the other hand still provides a range hood, and range hood includes the belt cleaning device according to the range hood of last item.

Through the technical scheme, compared with the prior art, the utility model provides a belt cleaning device for range hood passes through steam generator and spray tube subassembly's combination, wash the fan device, the spray tube subassembly includes preceding spray tube and back spray tube, preceding spray tube stretches into the spiral case intracavity from the front wind gap end of spiral case, the back spray tube stretches into the spiral case chamber from the back wind gap end of spiral case, thereby wash the fan device from a plurality of directions, the spray tube of spray tube subassembly stretches into the inboard that the end stretches into the impeller of impeller and encloses in, in order to realize no dead angle, the washing of department is not sheltered from, and through the settlement of preceding spray tube control flap and back spray tube control valve, realize more high-efficient and intelligent washing, accelerate cleaning efficiency, reduce abluent time, with the high-efficient high-quality requirement who satisfies the user.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:

fig. 1 is a schematic structural view of a cleaning device for a range hood according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a nozzle assembly in a cleaning device for a range hood according to an embodiment of the present invention;

fig. 3 is another structural diagram of a nozzle assembly in a cleaning device for a range hood according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a nozzle assembly in a cleaning device for a range hood according to an embodiment of the present invention at a first viewing angle;

fig. 5 is a schematic structural view of another view angle of the cleaning device for the range hood according to the embodiment of the present invention;

fig. 6 is a schematic structural view of another view angle of the cleaning device for the range hood according to the embodiment of the present invention;

fig. 7 is a schematic structural view of a spray pipe in a cleaning device for a range hood according to an embodiment of the present invention; and

fig. 8 is an enlarged schematic view of a part of the structure of the cleaning device for the range hood provided in the embodiment of the present invention.

Description of the reference numerals

100. A cleaning device; 200. fan device

300. A rack top plate; 11. a steam generator;

12. a spout assembly; 13. a nozzle mounting bracket;

21. a volute; 22. an impeller;

111. an inlet end; 112. a steam outlet end;

121. a front nozzle; 122. a rear nozzle;

123. a three-way pipe; 124. a front nozzle control valve;

125. the rear spray pipe controls a valve; 126. the spray pipe extends into the end;

1261. axially spraying holes; 1262. and (4) circumferentially spraying holes.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.

It will be understood that when an original is referred to as being fixed to another original, it can be directly on the one element or there can be an intervening document. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper," "lower," "left," "right," and similar directional terms are used herein for illustrative purposes only.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a cleaning device for a range hood according to an embodiment of the present invention, the range hood includes a fan device 200, and the fan device 200 is used to rapidly exhaust oil smoke generated in a cooking process, so as to achieve a function of purifying a kitchen environment. The present invention provides a cleaning device 100, which is intended to clean the fan device 200.

Specifically, the embodiment of the utility model provides a range hood's belt cleaning device 100 includes:

a steam generator 11 for supplying a steam cleaning medium;

and a spray pipe assembly 12 connected to the steam generator 11 for spraying the steam cleaning medium supplied from the steam generator 11 to the fan device 200 for cleaning.

In the embodiment of the present invention, the overall contour of the fan device 200 is not limited, and the fan device is optionally a scroll. Generally speaking, the fan device 200 may be an axial fan or a centrifugal fan, and may include a front air inlet one-way fan or a two-way air inlet two-way fan according to the operation mode, and the two-way air inlet two-way centrifugal fan is optionally adopted in this embodiment for illustration, and it should be understood by those skilled in the art that the fan device 200 provided in the present invention is merely used as an example, and does not limit the cleaning device 100 in any structure and type.

The blower device 200 includes a volute 21, and an impeller 22 disposed in the volute 21, when the impeller 22 rotates, the airflow enters the impeller 22 of the blower device 200 axially and then flows mainly in a radial direction, so as to be discharged from an air outlet (not labeled) on the upper side of the blower device 200.

In the embodiment of the present invention, the steam generator 11 is disposed on the upper side of the fan device 200 and is fixedly connected to the fan device 200, specifically, the range hood includes the frame top plate 300, the frame top plate 300 is the top structure of the housing for protecting the fan device 200, the steam generator 11 is fixedly connected to the frame top plate 300 of the range hood and is connected to the volute 21 below through the nozzle assembly 12, so that the frame top plate 300, the fan device 200, the steam generator 11 and the nozzle assembly 12 are connected as a whole. The advantage of this mode is that, through frame roof 300 as the accepting of steam generator 11 and fan device 200, steam generator 11 is through connecting spray tube subassembly 12 simultaneously, and the cleaning medium that produces steam generator 11 transmits fan device 200 department to wash fan device 200, this mode is through having saved range hood's inner space for range hood can reduce the size, thereby more exquisite. Meanwhile, since the steam generator 11 is located at the upper side, the steam cleaning medium enters the nozzle assembly 12 from the top to the bottom, which is beneficial to the circulation of the steam cleaning medium.

In some embodiments, the steam generator 11 and the fan device 200 may be directly integrated into a whole, and the invention also falls into the protection scope covered by the present invention.

Similarly, the specific connection mode of the steam generator 11 and the top plate of the rack is not limited, and can be one of a screw connection and a clamping connection, and only the requirement that the steam generator 11 provides a cleaning medium for the spray pipe assembly 12 is met.

In the embodiment of the utility model, according to steam generator 11's work speciality, steam generator 11 is used for with cleaning medium, like water, perhaps washing liquid, the heating produces into hot cleaning medium, like hot steam cleaning medium, hot steam cleaning medium sprays back on spiral case 21 and impeller 22 through spray tube subassembly 12, because under the characteristic of hot steam cleaning medium self, the mobility of greasy dirt is heated the reinforcing, the rotation of impeller 22 is deuterogamied, further drive steam cleaning medium's flow, thereby steam cleaning medium spreads the greasy dirt of mixing on impeller 22 and the spiral case 21 everywhere, along with fan unit 200's impeller 22 spin-effect under one side radially bleed to the gas port discharge, lead to the greasy dirt to break away from the organism of lampblack absorber.

It can be understood that the source of the cleaning medium is from a water pump (not shown) externally connected to the steam generator 11, the steam generator 11 includes an inlet end 111 and a steam outlet end 112, the water pump is connected to the inlet end 111 of the steam generator 11, the steam outlet end 112 is connected to the nozzle assembly 12, the water pump supplies the steam cleaning medium to the steam generator 11, the steam cleaning medium is heated by the steam generator 11, then is led out from the steam outlet end 112, and is sprayed onto the scroll 21 and the impeller 22 through the nozzle assembly 12, so as to clean the scroll 21 and the impeller 22. Therefore, when the cleaning device 100 provided by the present embodiment is used, after the steam cleaning medium is sprayed onto the impeller 22, mechanical energy can be provided to the steam cleaning medium due to the rotation of the impeller 22, and the steam cleaning medium effectively washes the inner wall of the volute 21 and the impeller 22 under the agitation of the impeller 22.

Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a nozzle assembly in a cleaning device of a range hood according to an embodiment of the present invention, fig. 3 is another structural diagram of the nozzle assembly in the cleaning device of the range hood according to an embodiment of the present invention, and the nozzle assembly 12 is characterized as follows: the nozzle assembly 12 comprises at least two nozzles, optionally two nozzles, each of which includes a front nozzle 121 and a rear nozzle 122 at the end, the front nozzle 121 extends to one side of the impeller 22, and the rear nozzle 122 extends to the other side of the impeller 22 opposite to the front nozzle 121, so that the nozzle assembly surrounds the circumferential side of the volute 21; preceding spray tube 121 stretches into the spiral case 21 intracavity from the front wind gap end of spiral case 21, back spray tube 122 stretches into the spiral case 21 intracavity from the back wind gap end of spiral case 21, thereby steam cleaning medium after steam generator 11 handles spouts respectively via preceding spray tube 121 and back spray tube 122, with the both sides to impeller 22, and the both sides of spiral case 21 inner wall are washed, through this type of mode, can wash the both sides of whole fan device 200, thereby guarantee abluent thorough degree, thereby prevent to shelter from the department, there is the unclean phenomenon of washing in the dead angle, in order to wash completely the preceding rear end to fan device 200.

Wherein, the definition of "front" and "back" in the embodiment of the present invention is: use any face of fan device 200 as "preceding" side, the relative another side that deviates from this face is as "back" side, and above-mentioned preceding wind gap end and back wind gap end can be regarded as the both sides that fan device 200 deviates from promptly, and it can be understood that "preceding" of the embodiment of the utility model discloses "back" only is for distinguishing the effect that the characteristic played convenient explanation, and does not carry out the restriction in any position to the front and back.

The end of the spout assembly 12 is defined as: the nozzle assembly 12 is used for spraying steam cleaning medium to the impeller 22, wherein the number of the steam outlet ends 112 of the steam generator 11 may be two or one:

as shown in fig. 2, when only one steam outlet end 112 of the steam generator 11 is provided, the nozzle assembly 12 includes a tee 123, and the tee 123 is disposed between the front nozzle 121 and the rear nozzle 122. The three-way pipe 123, the front spray pipe 121 and the rear spray pipe 122 are all conducted, specifically, a main branch of the three-way pipe 123 is connected to the steam outlet end 12 of the steam generator 11, other branch branches are respectively connected to the front spray pipe 121 and the rear spray pipe 122, and the steam cleaning medium flows from the main branch to the front spray pipe 121 and the rear spray pipe 122 through the branch after passing through the steam outlet end 12. Meanwhile, since the front nozzle 121 and the rear nozzle 122 extend to both sides of the blower device 200, respectively, the rotation of the impeller 22 drives the steam cleaning medium to diffuse to other areas in front of and behind the blower device 200, thereby achieving a cleaning effect.

As shown in fig. 3, when there are two steam outlet ends 112 of the steam generator 11, the steam generator 11 may be provided with two steam outlet ends 112, the front spray pipe 121 and the rear spray pipe 122 are independently disposed and respectively connected to the two steam outlet ends 112 of the steam generator 11, the front spray pipe 121 extends to one side of the impeller 22, the rear spray pipe 122 extends to the other side of the impeller 22 in a reverse direction relative to the front spray pipe 121, and the steam generator 11 respectively delivers steam cleaning medium to the front spray pipe 121 and the rear spray pipe 122 through the two steam outlet ends 112 to spray to two sides of the fan device 200 for cleaning.

The embodiment of the utility model provides an in, the three-way pipe 123 sets up on the periphery wall of spiral case 21 and two branch roads are extended around respectively towards, two exit ends are foretell preceding wind gap end and back wind gap end promptly, it indicates that the branch way of three-way pipe 123 extends forward respectively to wind gap end and back wind gap end around respectively to extend, in order to supply preceding spray tube 121 and back spray tube 122 to connect, the connected mode of preceding spray tube 121 and back spray tube 122 and three-way pipe does not prescribe a limit to, can peg graft, also can be directly with three-way pipe 123, preceding spray tube 121 and the direct integrated shaping of back spray tube 122, it can to spray the both sides to fan device 200 only to need to realize preceding spray tube 121 and back spray tube 122.

Referring to fig. 4, fig. 4 is a schematic structural view of a spray pipe assembly in a cleaning device of a range hood according to an embodiment of the present invention at a first viewing angle, the spray pipe assembly 12 further includes a front spray pipe control valve 124 and a rear spray pipe control valve 125 for controlling the spraying of the front spray pipe 121 and the rear spray pipe 122 of the steam cleaning medium, specifically, the front spray pipe control valve 124 is disposed between the front spray pipe 121 and the steam generator 11, the rear spray pipe control valve 125 is disposed between the rear spray pipe 122 and the steam generator 11, more specifically, the front spray pipe control valve 124 is disposed between the front spray pipe 121 and the tee pipe 123, the rear spray pipe control valve 125 is disposed between the rear spray pipe 122 and the tee pipe 123, a main branch of the tee pipe 123 is connected to the steam outlet end 112 of the steam generator 11, and by this arrangement, there is an advantage that, generally, a maximum pressure value of the steam cleaning medium output by the steam outlet end 112 of, through the setting of the front spray pipe control valve 124 and the rear spray pipe control valve 125, one of the valves can be closed, so that the steam cleaning medium flowing to the three-way pipe 123 only flows to one of the spray pipes, the pressure is concentrated on one of the spray pipes to be sprayed out, and the corresponding surface of the fan device 200 is effectively and powerfully flushed, so that the overall cleaning quality and the cleaning efficiency are improved.

Please refer to fig. 5, fig. 5 is a schematic structural diagram of the cleaning device of the range hood at the second viewing angle, the nozzle assembly 12 further includes a nozzle mounting bracket 13 for fixing the nozzle, the nozzle mounting bracket 13 is disposed on the fan device 200, specifically, the nozzle mounting bracket 13 is disposed on the end surface of the front wind port end and/or the rear wind port end, the nozzle assembly 12 can be clamped on the nozzle mounting bracket 13, and is limited by the embedding manner, thereby ensuring that the nozzle assembly 12 does not cause position deviation due to the vibration of the fan device 200 during the operation process, and affecting the cleaning effect. It will be appreciated that the number of lance mounting brackets 13 is not limited and may be one or more than one to simultaneously restrain lance assembly 12, but only to limit the freedom of lance assembly 12 to prevent its position from changing.

Referring to fig. 6, fig. 6 is a schematic structural view of another view angle of the cleaning device of the range hood according to the embodiment of the present invention, the nozzle assembly 12 further includes a nozzle extension end 126, the nozzle extension end 126 is defined as a common feature of the front nozzle 121 and the rear nozzle 122 extending into the impeller 22 inside the volute 21, specifically, the nozzle extension end 126 of the nozzle assembly 12 extends into the inner side of the inner circumference of the impeller 22, the nozzle extension end 126 is a part sprayed by the steam cleaning medium, and the axial direction of the nozzle extension end 126 is the same as the axial direction of the impeller 22, so as to extend into the inner side to clean the impeller 22 and the volute 21. The shape of the nozzle end 126 is bent to provide a suitable angle for the steam cleaning medium to be sprayed, thereby reducing the design difficulty and increasing the cleaning degree.

Referring to fig. 6 and 7, fig. 7 is a schematic structural diagram of a nozzle in a cleaning device of a range hood according to an embodiment of the present invention, where the nozzle extension end 126 is provided with at least one nozzle hole, optionally, the nozzle extension end 126 is provided with an axial nozzle hole 1261 and a circumferential nozzle hole 1262 which are arranged relative to an impeller 22, and a steam cleaning medium is sprayed out from the axial nozzle hole 1261 and the circumferential nozzle hole 1262 along two directions, namely, the axial direction and the circumferential direction relative to the impeller 22, so as to synchronously clean a middle connection fixing position and a rear side position of the impeller 22, and the setting is advantageous in that: generally speaking, the two positions are positions where oil stains are easy to accumulate and the users are difficult to clean, and through the setting, the cleaning range of the spray pipe assembly 12 can be increased, dead angles are avoided, meanwhile, the cleaning efficiency is accelerated, and the cleaning time is shortened, so that the high-efficiency and high-quality requirements of the users are met.

Referring to fig. 7 and 8, fig. 8 is an enlarged schematic view of a part of the structure of a cleaning device of a range hood according to an embodiment of the present invention, wherein the spraying direction of the spraying pipe assembly 12 is: through the setting of axial jet holes 1261 and circumferential jet holes 1262, the circumferential jet holes 1262 of the jet pipe assembly 12 jet to the inner concave surfaces of blades (not labeled) in the impeller 22, so that steam cleaning media can be better diffused when being jetted to the impeller 22, and the jet direction is the reverse direction of the normal electrification rotation of the impeller 22, so that the blades are in opposite contact with the incoming flow, the cleaning effect is further increased, and the cleaning is more thorough.

The embodiment of the utility model provides an in, belt cleaning device still includes controller (not shown), preceding spray tube control flap and the equal electrically connected controller of back spray tube control flap to control preceding spray tube control flap and back spray tube control flap. The controller can be single-chip microcomputer or computer that can encode, also can adopt analog circuit or digital circuit to replace, can understand, and the controller belongs to technical means commonly used in this trade field personnel, the utility model discloses not many explanations.

To sum up, the utility model provides a cleaning device, this cleaning device is mainly applicable to range hood, it passes through steam generator and nozzle assembly's combination, wash the fan device, specifically, with preceding spray tube and back spray tube, preceding spray tube stretches into the spiral case intracavity from the front wind gap end of spiral case, the back spray tube stretches into the spiral case chamber from the back wind gap end of spiral case, thereby wash the fan device from a plurality of directions, the spray tube of nozzle assembly stretches into the end and stretches into the inboard of the interior circumference of impeller, in order to realize no dead angle, the washing of department is sheltered from to the nothing, and through the settlement of preceding spray tube control flap and back spray tube control valve, realize the washing of more high-efficient and intelligence, accelerate the cleaning efficiency, reduce abluent time, in order to satisfy user's high-quality requirement.

When the cleaning device is used, the steam generator is firstly externally connected with a water pump by utilizing an inlet end and is used for introducing steam cleaning medium, such as water or cleaning liquid, heating the steam cleaning medium to generate hot steam cleaning medium, such as hot steam cleaning medium, the steam cleaning medium is discharged to the spray pipe component through the steam outlet end and then is sprayed onto the volute and the impeller through the spray pipe component, the impeller synchronously rotates at the moment, the liquidity of oil stain is heated and enhanced under the self characteristic of the hot steam cleaning medium, the rotation of the impeller is matched to further drive the flow of the steam cleaning medium, so that the steam cleaning medium is diffused to the impeller and the volute to mix the oil stain on the impeller and the volute everywhere, the oil stain is discharged to an air port along with the radial air suction of one side under the rotation action of the impeller of the fan device, the oil stain is separated from the body of the range hood, can be so that the cleaning performance is more thorough, avoid not by the dead angle that washs with shelter from the department, connect fixed position and rear position like the middle part of impeller, and because steam cleaning medium's injection direction on the spray tube, for the normal circular telegram pivoted of impeller is reverse to form blade and inflow opposite direction contact, further strengthen the cleaning performance, make the cleaning efficiency increase.

The user can also be through setting for image recognition automatic judgement fan device's surface cleanliness factor according to the greasy dirt degree of wind gap end before the range estimation fan device and back wind gap end to spray tube control flap and back spray tube control flap before manual and/or automatic control, and then the injection of spray tube and back spray tube before the control, exemplary if: when the image recognition detects that the front air inlet end of the fan device is dirty, firstly, the rear spray pipe control valve closes the spray of the rear spray pipe, and only the front spray pipe is opened to clean the fan device; the benefits of this approach are: the pressure maximum value of the steam outlet end of the steam generator for outputting the steam cleaning medium is constant, the front spray pipe control valve and the rear spray pipe control valve are set, one valve can be closed, the steam cleaning medium flowing to the three-way pipe only flows to one spray pipe, pressure is concentrated on one spray pipe, effective powerful washing is conducted on the surface corresponding to the fan device, and therefore the overall cleaning quality and the cleaning efficiency are improved.

In an embodiment of the present invention, a range hood is further provided, and the range hood includes the above range hood cleaning device, and a fan device, or a combination of the cleaning device and the fan device. It will also be understood by those skilled in the art that if all or some of the elements of the structure of the present invention are combined by fusing, physical connection, etc., the elements may be moved relative to each other; or integrally provided; or a detachable design; all the combined components can form equipment/devices with specific functions, and the equipment/devices are replaced by the equipment/devices, so that the corresponding components of the utility model also fall within the protection scope of the utility model.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. A cleaning device for a range hood, the range hood including a volute and an impeller mounted in the volute, the cleaning device comprising:

the spray pipe assembly comprises a front spray pipe and a rear spray pipe, the front spray pipe extends into the volute cavity from the front air inlet end of the volute, and the rear spray pipe extends into the volute cavity from the rear air inlet end of the volute; and

a steam generator connected to the nozzle assembly to supply a steam cleaning medium.

2. The cleaning apparatus in accordance with claim 1, wherein a nozzle-extending end of the nozzle assembly extends inside an inner circumference of the impeller, the nozzle-extending end being provided with axial and circumferential nozzles disposed with respect to the impeller.

3. The cleaning device according to claim 2, wherein the circumferential nozzle hole jet of the circumferential nozzle hole is directed toward the circumferential wall of the inner circumference of the impeller, and the axial nozzle hole jet of the axial nozzle hole is directed toward the blade concave surface of the impeller.

4. The cleaning device of claim 1, wherein the spout assembly further comprises:

the front spray pipe control valve is used for controlling the front spray pipe; and

and the rear spray pipe control valve is used for controlling the rear spray pipe.

5. The cleaning device of claim 4, wherein the nozzle assembly further comprises a tee, two branches of the tee are connected to the front nozzle and the rear nozzle, respectively, and a main branch of the tee is connected to the steam outlet end of the steam generator.

6. The cleaning apparatus defined in claim 5, wherein the tee is provided on an outer peripheral wall of the volute and the two branches extend forward and backward, respectively.

7. The cleaning apparatus defined in claim 6, wherein the nozzle assembly further comprises a nozzle mounting bracket for securing a nozzle, the nozzle mounting bracket being disposed on an end face of the forward and/or aft tuyere end.

8. The cleaning device according to claim 5, wherein the steam generator is disposed on a top plate of a rack of the range hood and connected to the volute below through the nozzle assembly.

9. The cleaning apparatus defined in any one of claims 4-8, further comprising a controller, wherein the front nozzle control valve and the rear nozzle control valve are both electrically connected to the controller.

10. A range hood, characterized in that the range hood comprises a cleaning device for a range hood according to any one of claims 1 to 8.

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