Self-cleaning range hood

Abstract

The present invention belongs to the technical field of range hoods, and specifically discloses a self-cleaning range hood. The self-cleaning range hood includes a delivery pipe and a spray part, and the spray part includes a shell, a movable nozzle and an elastic reset part. The delivery pipe guides the cleaning liquid; the shell is connected to the smoke inlet channel assembly and is located in the wind cavity. The shell is provided with a liquid inlet hole and a receiving cavity that are interconnected, and the liquid inlet hole is connected to one end of the delivery pipe; the movable nozzle can move along the axial direction of the wind wheel, and one end is provided in the receiving cavity. The end of the movable nozzle extending out of the receiving cavity is provided with at least one spray hole connected to the receiving cavity; the elastic reset part is connected between the movable nozzle and the shell, and the elastic reset part always has a tendency to push the movable nozzle to move toward the receiving cavity. In the self-cleaning range hood disclosed by the present invention, the movable nozzle is provided in the wind wheel, and can reciprocate along the axial direction of the wind wheel, thereby performing all-round and three-dimensional spray cleaning on the wind wheel, with a large cleaning coverage area and good cleaning effect.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, in particular to a self-cleaning range hood. Background Art

[0002] The range hood is installed above the stove in the kitchen. It is a kitchen appliance that extracts and concentrates the waste from stove combustion and the fumes that are harmful to the human body generated during cooking. Part of the fumes are discharged outdoors, and part of the fumes are condensed and collected. The smoke inlet channel of the range hood is an important component for extracting fumes. There is often a lot of fumes accumulated, and it needs to be cleaned frequently. In the prior art, the cleaning nozzle of the range hood usually uses a single spray point to spray cleaning liquid outward in a straight line. The cleaning nozzle sprays the cleaning liquid on a certain point of the structure to be cleaned, and the cleaning liquid then migrates and diffuses from this point to the surrounding surface. However, due to the single point, the spray coverage area of ​​the structure to be cleaned is insufficient, and the migration and diffusion area of ​​the cleaning liquid is limited, resulting in incomplete cleaning. In particular, for some oil stains with strong adhesion, or some dead corners on the structure to be cleaned, it is more difficult to clean them. Summary of the Invention

[0003] The technical problem solved by the present invention is to provide a self-cleaning range hood, which can spray and clean the fan wheel comprehensively, has a large cleaning coverage area and a good cleaning effect.

[0004] The above technical problems are solved by the following technical solutions:

[0005] A self-cleaning range hood includes a smoke inlet channel assembly, the smoke inlet channel assembly including a wind cabinet body and a wind wheel, the wind wheel being rotatably disposed in the wind cabinet body and provided with a wind cavity, the self-cleaning range hood also including a nozzle assembly, the nozzle assembly including a delivery pipe for delivering cleaning liquid and a spraying portion for spraying, wherein the spraying portion includes:

[0006] A shell connected to the smoke inlet channel assembly and located in the air cavity, the shell being provided with a liquid inlet hole and a receiving cavity that are interconnected, the liquid inlet hole being connected to one end of the delivery pipe;

[0007] a movable nozzle, movable along the axial direction of the wind wheel; one end of the movable nozzle is disposed in the accommodating cavity, the other end of the movable nozzle extends out of the accommodating cavity, and the other end is provided with at least one spray hole, the spray hole being in communication with the accommodating cavity;

[0008] An elastic return member is connected between the movable nozzle and the shell, and the elastic return member always has a tendency to push the movable nozzle to move toward the accommodating chamber.

[0009] Compared with the prior art, the self-cleaning range hood of the present invention has the following beneficial effects: the movable nozzle is disposed within the wind cavity of the impeller and is capable of reciprocating along the axial direction of the impeller, causing the spray holes to perform axial movement and spray cleaning on the impeller. Simultaneously, in conjunction with the slow rotation of the impeller, the spray holes form a radially surrounding spray cleaning pattern on the impeller, ensuring that the spray range of the spray holes completely covers the impeller blade surface, avoiding blind spots on the impeller that are not sprayed. By soaking the oil stains on the blade surface with cleaning fluid, a comprehensive and three-dimensional cleaning is achieved, achieving a comprehensive and three-dimensional cleaning. The cleaning structure is simple and the cleaning effect is excellent.

[0010] In one embodiment, the elastic return member is disposed in the accommodating cavity and is connected between the movable nozzle and the housing in a compressed state.

[0011] In one embodiment, the movable nozzle includes a hydraulic movable plug, which is slidably arranged in the accommodating cavity. The hydraulic movable plug is provided with a pressure-bearing groove and a guide cavity that are interconnected. The guide cavity passes through the hydraulic movable plug to connect to the spray hole.

[0012] In one embodiment, the movable nozzle further includes a diverter seat, which is detachably connected to an end of the hydraulic movable plug extending out of the accommodating cavity, and the spray hole is provided on the diverter seat.

[0013] In one embodiment, the shunt seat comprises:

[0014] A fixing member, clamped on the hydraulic movable plug;

[0015] a flow guide member, detachably connected to the fixing member;

[0016] A guide plate is provided between the fixing member and the guide member, and at least one guide channel is formed between the guide plate and the guide member, wherein two ends of the guide channel are respectively connected to the guide cavity and the spray hole.

[0017] In one embodiment, the flow guide member is provided with a flow guide slope, and the flow guide slope is provided in the flow guide channel.

[0018] In one embodiment, the diverter seat is provided with two diverter channels, and the two diverter channels are symmetrically arranged along the axis of the hydraulic movable plug.

[0019] In one embodiment, the shell includes an upper shell and a lower shell that are detachably connected, the liquid inlet is provided on the upper shell, and the lower shell is provided with a guide hole, and the movable nozzle is slidably inserted into the guide hole.

[0020] In one embodiment, it further includes a lower cover, which is connected to the other end of the movable nozzle. A concave accommodating groove is provided on the side of the lower shell body facing away from the accommodating cavity. The accommodating groove is connected to the guide hole. The end of the movable nozzle extending out of the accommodating cavity is located in the accommodating groove. When the elastic return member is in the original state, the lower cover covers the accommodating groove.

[0021] In one embodiment, the injection portion further includes a flow guide cover disposed in the accommodating cavity. The flow guide cover is detachably disposed between the movable nozzle and the shell, and surrounds one end of the movable nozzle located in the accommodating cavity. A plurality of through flow guide holes are provided on the flow guide cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the fan structure of a self-cleaning range hood provided by an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of structural disassembly;

[0024] Figure 3 A schematic structural diagram of a spraying unit according to an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Schematic diagram of structural disassembly;

[0026] Figure 5 A cross-sectional view of the structure of the injection portion provided in an embodiment of the present invention Figure 1 ;

[0027] Figure 6 A cross-sectional view of the structure of the injection portion provided in an embodiment of the present invention Figure 2 ;

[0028] Figure 7 A schematic structural diagram of a fixing member provided in an embodiment of the present invention;

[0029] Figure 8 A schematic structural diagram of a flow guide member provided in an embodiment of the present invention;

[0030] Figure 9 A schematic structural diagram of a guide vane provided in an embodiment of the present invention.

[0031] Description of labels:

[0032] 1. Smoke inlet channel assembly; 11. Wind cabinet body; 12. Wind wheel; 121. Wind cavity; 13. Air inlet net; 14. Motor;

[0033] 2. Spraying unit; 22. Housing; 221. Liquid inlet; 222. Accommodating chamber; 223. Upper housing; 224. Lower housing; 2241. Guide hole; 2242. Accommodating groove; 225. Lower cover; 23. Movable nozzle; 231. Spray hole; 232. Hydraulic movable plug; 2321. Pressure-bearing groove; 2322. Guide chamber; 2323. Pressure-bearing end surface; 2324. Slot; 233 , diverter seat; 2331, fixing member; 2332, guide member; 2333, guide plate; 2334, guide channel; 2335, guide slope; 2336, connecting groove; 2337, connecting member; 2338, toothing; 2339, slot; 234, clamping plate; 235, sealing gasket; 24, elastic reset member; 25, sealing ring; 26, guide cover; 261, guide hole;

[0034] 3. Delivery pipe. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, features identified as "first," "second," and "third" may explicitly or implicitly include one or more of such features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0039] like Figures 1-9 As shown, an embodiment of the present invention provides a self-cleaning range hood, comprising a smoke inlet duct assembly 1, which includes a wind cabinet body 11 and a wind wheel 12. The wind wheel 12 is rotatably disposed within the wind cabinet body 11 and is provided with a wind cavity 121. The smoke inlet duct assembly 1 also includes a motor 14, which is used to drive the wind wheel 12 to rotate, generating negative pressure to extract oil smoke; therefore, a large amount of oil smoke particles often accumulates on the wind wheel 12, requiring frequent cleaning.

[0040] The self-cleaning range hood of the embodiment of the present invention further comprises a nozzle assembly, the nozzle assembly comprises a delivery pipe 3 and a spraying portion 2 for spraying, the spraying portion 2 comprises a housing 22, a movable nozzle 23 and an elastic reset member 24, as shown in FIG. Figure 2 、 Figure 3As shown. The delivery pipe 3 is used to guide the cleaning liquid, which is delivered by pressure. The embodiment of the present invention does not limit the composition of the cleaning liquid. The shell 22 is connected to the smoke inlet channel assembly 1 and is located in the wind cavity 121. The shell 22 is provided with a liquid inlet hole 221 and a receiving cavity 222 that are interconnected. The liquid inlet hole 221 is connected to one end of the delivery pipe 3, and the cleaning liquid enters the receiving cavity 222 along the delivery pipe 3 through the liquid inlet hole 221. The movable nozzle 23 can move along the axial direction of the wind wheel 12. One end of the movable nozzle 23 is provided in the receiving cavity 222, and the other end of the movable nozzle 23 extends out of the receiving cavity 222. At least one spray hole 231 is provided on the other end, and the spray hole 231 is connected to the receiving cavity 222. Cleaning liquid is sprayed from the accommodating chamber 222 through the spray holes 231 onto the blades of the wind rotor 12, thereby cleaning the wind rotor 12. Since the motor 14 can drive the wind rotor 12 to rotate, the spray holes 231 correspond to different radial circumferential locations on the wind rotor 12 as the wind rotor 12 rotates. Therefore, the cleaning liquid sprayed from the spray holes 231 can surround the radial circumference of the wind rotor 12. Furthermore, the movable nozzle 23 can move axially along the wind rotor 12. Therefore, the spray holes 231 can correspond to different axial locations on the wind rotor 12, allowing the cleaning liquid to be sprayed axially along the wind rotor 12. The axial movement of the movable nozzle 23 is formed by the joint action of the cleaning fluid and the elastic reset member 24. The elastic reset member 24 is connected between the movable nozzle 23 and the shell 22. The elastic reset member 24 always has a tendency to push the movable nozzle 23 to move toward the accommodating chamber 222, and the cleaning fluid can push the movable nozzle 23 to move in the direction of extending out of the accommodating chamber 222. The combined force of the two forces forms a variable pressure, so that the movable nozzle 23 can move along the axial direction of the wind wheel 12.

[0041] More preferably, the pressure of the cleaning liquid in the delivery pipe 3 can be adjusted according to the structure of the wind wheel 12 and the type of oil fume particles, thereby adjusting the spray angle and coverage area of ​​the sprayed cleaning liquid to avoid some dead corners on the wind wheel 12 from being unable to be sprayed, thereby achieving the required cleaning effect.

[0042] In the self-cleaning range hood of the embodiment of the present invention, the movable nozzle 23 is disposed within the air cavity 121 of the impeller 12 and is capable of reciprocating along the axial direction of the impeller 12, causing the spray holes 231 to move axially and spray clean the impeller 12. Simultaneously, in conjunction with the slow rotation of the impeller 12, the spray holes 231 form a radially surrounding spray cleaning pattern around the impeller 12, ensuring that the spray range of the spray holes 231 completely covers the blade surfaces of the impeller 12, preventing blind spots on the impeller 12 from being sprayed. By soaking the oil stains on the blade surfaces with cleaning liquid, a comprehensive, three-dimensional cleaning is achieved, resulting in a simple cleaning structure and excellent cleaning effect.

[0043] As a preferred solution, the elastic reset member 24 is disposed in the accommodating chamber 222 and is in a compressed state connecting the movable nozzle 23 and the housing 22. The elastic reset member 24 always has a tendency to push the movable nozzle 23 toward the accommodating chamber 222, that is, the thrust applied by the elastic reset member 24 to the movable nozzle 23 and the thrust applied by the cleaning liquid to the movable nozzle 23 are in opposite directions. Therefore, the cleaning liquid first needs to overcome the thrust applied by the elastic reset member 24 to the movable nozzle 23. When the pressure applied by the cleaning liquid to the movable nozzle 23 reaches a certain value, the movable nozzle 23 will move axially away from the accommodating chamber 222, so that the spray hole 231 corresponds to different axial areas of the wind wheel 12, such as Figure 6 When the movable nozzle 23 needs to move in the opposite direction, the pressure of the cleaning fluid is gradually reduced. When the thrust applied by the elastic reset member 24 to the movable nozzle 23 is greater than the pressure of the cleaning fluid, the elastic reset member 24 pushes the movable nozzle 23 toward the direction of the accommodating chamber 222, and finally restores the initial position, as shown. Figure 5 As shown. In an embodiment of the present invention, the elastic reset member 24 is a compression spring, which is mounted outside the movable nozzle 23, and one end is connected to the top of the movable nozzle 23, and the other end is connected to the shell 22, thereby applying a stable elastic force to the movable nozzle 23. In other embodiments, the elastic reset member 24 may also adopt an elastic structure such as a shrapnel, a disc spring, etc., which is not limited to this embodiment. Of course, the elastic reset member 24 may also be arranged outside the accommodating chamber 222, and connected between the movable nozzle 23 and the shell 22 in an extended state. The elastic reset member 24 in the extended state applies a pulling force to the movable nozzle 23, and the direction of the pulling force is opposite to the direction of the thrust applied by the cleaning liquid to the movable nozzle 23. It can also form a variable resultant pressure acting on the movable nozzle 23, causing the movable nozzle 23 to move axially in the direction away from the accommodating chamber 222. In short, the arrangement of the elastic reset member 24 is not limited to the drawings of this embodiment.

[0044] Specifically, the movable nozzle 23 includes a hydraulic movable plug 232, such as Figure 5 As shown, the hydraulically movable plug 232 is slidably disposed within the accommodating chamber 222. The hydraulically movable plug 232 is provided with a pressure-bearing groove 2321 and a guide cavity 2322, which are interconnected. The pressure-bearing groove 2321 has a pressure-bearing end surface 2323, which is an annular end surface. Cleaning liquid flows from the liquid inlet 221 into the accommodating chamber 222 and exerts pressure on the pressure-bearing end surface 2323, thereby more evenly distributing the thrust on the movable nozzle 23 and preventing uneven force on the movable nozzle 23 from causing sliding jams. Furthermore, the pressure-bearing end surface 2323 increases the force-bearing area of ​​the movable nozzle 23, making it easier for the cleaning liquid to push the movable nozzle 23. The cleaning liquid enters the guide cavity 2322 from the pressure-bearing groove 2321. The guide cavity 2322 penetrates the hydraulically movable plug 232 to connect with the spray hole 231, causing the cleaning liquid to be sprayed out of the spray hole 231.

[0045] Preferably, the liquid inlet 221 is located on the upper surface of the housing 22 directly opposite the movable nozzle 23. This allows the cleaning liquid to be more accurately ejected toward the end surface of the movable nozzle 23 upon entering the movable nozzle 23. It should be noted that the liquid inlet 221 may also be located at other locations on the housing 22, such as on the side of the housing 22 or at a location on the upper surface of the housing 22 not directly opposite the movable nozzle 23. This can also generate an adjustable pressure within the accommodating chamber 222 to promote axial movement of the movable nozzle 23, and the present embodiment is not limited to the drawings.

[0046] Furthermore, the movable nozzle 23 further includes a diverter seat 233, such as Figure 5 As shown, the diverter seat 233 is detachably connected to the end of the hydraulic movable plug 232 that extends out of the accommodating chamber 222 and is located outside the housing 22. The diverter seat 233 limits the axial movement of the hydraulic movable plug 232, preventing the hydraulic movable plug 232 from sliding back into the accommodating chamber 222 under the action of the elastic return member 24. The detachable connection structure of the diverter seat 233 also facilitates assembly of the movable nozzle 23. The spray hole 231 is provided on the diverter seat 233, which diverts and guides the cleaning liquid in the guide chamber 2322 to flow toward the spray hole 231.

[0047] As a preferred solution, the diverter seat 233 includes a fixing member 2331, a guide member 2332 and a guide plate 2333. The fixing member 2331 is clamped on the hydraulic movable plug 232, and the guide member 2332 is detachably connected to the fixing member 2331. The detachable connection structure provided in this embodiment is as follows: the fixing member 2331 is provided with two connecting grooves 2336 with openings, such as Figure 7 Accordingly, the guide member 2332 is provided with two connecting members 2337, as shown Figure 8 As shown; screw the fixing member 2331 and the guide member 2332 relative to each other, and make the connecting member 2337 snap into the connecting groove 2336 to achieve connection, and screw it in the opposite direction to achieve removal. The guide plate 2333 is arranged between the fixing member 2331 and the guide member 2332, and at least one guide channel 2334 is formed between the guide plate 2333 and the guide member 2332. In the embodiment of the present invention, the guide plate 2333 is connected to the guide member 2332 to ensure the stability of the guide channel 2334. Moreover, this structural form can reduce the processing difficulty of the diverter seat 233. Furthermore, the guide plate 2333 is provided with a spline 2338, as shown in FIG. Figure 9 As shown, correspondingly, the guide member 2332 is provided with a slot 2339, as shown in FIG. Figure 8As shown, the insert 2338 is inserted into the slot 2339 to connect the guide plate 2333 and the guide member 2332. The guide member 2332 is also provided with a guide bevel 2335, which is disposed within the guide channel 2334. The two ends of the guide channel 2334 respectively connect the guide cavity 2322 and the spray hole 231, thereby directing the cleaning liquid in the guide cavity 2322 to the spray hole 231 for spraying. By changing the inclination angle of the guide bevel 2335, the direction of the cleaning liquid sprayed from the spray hole 231 can be changed, thereby achieving a better cleaning effect. In this embodiment of the present invention, the guide bevel 2335 has straight segments at both ends and an arc segment in the middle. The arc segment connects the straight segments at both ends, thereby changing the flow direction of the cleaning liquid, changing the direction of the cleaning liquid from along the axis of the wind wheel 12 to perpendicular to the axis of the wind wheel 12. The cleaning liquid sprayed vertically from the spray hole 231 to the wind wheel 12 has a better cleaning effect on the blades. Moreover, the curved surface of the guide slope 2335 can prevent the cleaning liquid from impacting the movable nozzle 23 , thereby ensuring the continuity of the cleaning liquid sprayed from the spray hole 231 .

[0048] As a preferred embodiment, the diverter seat 233 is provided with two flow guide channels 2334, which are symmetrically arranged along the axis of the hydraulically movable plug 232. The two flow guide channels 2334 are axially symmetrically arranged on either side of the hydraulically movable plug 232. Accordingly, two spray holes 231 are also provided. This not only achieves multi-hole spraying and improves cleaning efficiency, but also balances the reaction force exerted on the hydraulically movable plug 232 by the cleaning liquid spraying from the spray holes 231, preventing uneven force on the hydraulically movable plug 232 from affecting the stability and reliability of axial movement.

[0049] Specifically, the movable nozzle 23 further includes a clamping plate 234, such as Figure 4 and Figure 5 As shown, a retaining groove 2324 is provided at one end of the hydraulically movable stopper 232, distal from the accommodating chamber 222. A retaining plate 234 is disposed between the fixing member 2331 and the flow guide member 2332 and is secured within the retaining groove 2324. The retaining plate 234 applies axial force to the fixing member 2331 and the flow guide member 2332, further enhancing the connection reliability between the fixing member 2331 and the flow guide member 2332 and preventing axial movement of the diverter seat 233 on the hydraulically movable stopper 232. In this embodiment, the retaining plate 234 can be implemented as a collar, making assembly and disassembly more convenient.

[0050] Furthermore, the movable nozzle 23 further includes a sealing gasket 235, such as Figure 4 and Figure 5As shown, the sealing gasket 235 is mounted on the hydraulic movable plug 232 and disposed between the fixing member 2331 and the clamping plate 234. The sealing gasket 235 fits the fixing member 2331, reducing leakage of the cleaning liquid from the gap between the fixing member 2331 and the hydraulic movable plug 232, thereby preventing the pressure and amount of the cleaning liquid sprayed from the spray hole 231 from being affected, thereby ensuring the cleaning effect.

[0051] As a preferred embodiment, the housing 22 includes a detachably connected upper housing 223 and a lower housing 224. The liquid inlet 221 is provided in the upper housing 223, and the lower housing 224 is provided with a guide hole 2241. The movable nozzle 23 is slidably inserted into the guide hole 2241. In this embodiment of the present invention, the upper housing 223 and the lower housing 224 are threadedly connected, providing a simple and reliable connection structure.

[0052] Furthermore, it also includes a lower cover 225, which is connected to the other end of the movable nozzle 23. The lower shell 224 is concave in the direction away from the accommodating chamber 222 to form an accommodating groove 2242. The end of the movable nozzle 23 away from the accommodating chamber 222 is located in the accommodating groove 2242. The lower cover 225 is connected to the movable nozzle 23 to selectively cover the accommodating groove 2242; when the spray part 2 is not needed, the lower cover 225 closes the accommodating groove 2242 to prevent oil smoke from entering and clogging the spray hole 231. Figure 5 As shown, the appearance is beautiful. When the lower cover 225 closes the accommodating groove 2242, the structure inside the shell 22 cannot be seen from the outside. When the spray part 2 is working, the movable nozzle 23 moves axially and drives the lower cover 225 to move away from the lower shell 224. The spray hole 231 is located outside the accommodating groove 2242, which can realize the spraying of the cleaning liquid. Figure 6 Moreover, the lower cover 225 can prevent some cleaning liquid from dripping directly, and guide some cleaning liquid to drip along the periphery of the lower cover 225, so that the spray cleaning range is larger. Preferably, the lower cover 225 is detachably connected to the guide member 2332, and the connection can be achieved through a plug-in structure.

[0053] As a preferred embodiment, the spraying portion 2 further includes a flow deflector 26, which is detachably connected between the movable nozzle 23 and the housing 22. The flow deflector 26 is disposed within the accommodating chamber 222 and surrounds one end of the movable nozzle 23 located within the accommodating chamber 222. The flow deflector 26 is provided with a plurality of through-flow guide holes 261, and one end of the flow deflector 26 is open, which is connected to the movable nozzle 23 or the lower housing 224. Specifically, in this embodiment, a fixing groove is provided on the end of the lower housing 224 facing the accommodating chamber 222 for securing the flow deflector 26. Evenly distributed diversion holes 261 are provided on the side of the deflector 26 and on the side facing the opening. Cleaning fluid can pass through the diversion holes 261 and evenly fill the accommodating chamber 222, maintaining a stable and uniform pressure within the accommodating chamber 222. Thereafter, cleaning fluid continues to flow into the accommodating chamber 222, continuously increasing the pressure on the hydraulically movable plug 232. When the pressure exceeds the thrust of the elastic return member 24, the hydraulically movable plug 232 is pushed to move. The deflector 26 evenly distributes the force exerted by the cleaning fluid on the hydraulically movable plug 232, preventing the cleaning fluid passing through the diversion holes 261 from directly impacting the hydraulically movable plug 232.

[0054] Furthermore, the spraying portion 2 further includes a sealing ring 25, which is sleeved on one end of the movable nozzle 23 located in the accommodating chamber 222. When the movable nozzle 23 moves in a direction away from the accommodating chamber 222, the sealing ring 25 can abut against the lower shell 224. Preferably, the sealing ring 25 is sleeved on the outer wall of the guide chamber 2322 in the hydraulic movable plug 232 and abuts against the pressure-bearing groove 2321. When the hydraulic movable plug 232 slides in a direction away from the accommodating chamber 222, the hydraulic movable plug 232 will abut against the lower shell 224 when it reaches its farthest stroke, as shown in FIG. Figure 6 As shown, at this time, the sealing ring 25 can reduce the impact force of the hydraulic movable plug 232 on the lower shell 224, and prevent the cleaning liquid from leaking from the gap between the lower shell 224 and the hydraulic movable plug 232, so that the cleaning liquid can only pass through the guide cavity 2322 in the middle of the hydraulic movable plug 232.

[0055] As a preferred embodiment, the smoke inlet duct assembly 1 also includes an air inlet mesh 13, which is connected to the wind cabinet body 11 and corresponds to the wind wheel 12. A housing 22 is detachably connected to the air inlet mesh 13, and the delivery pipe 3 is located on the side of the air inlet mesh 13 facing away from the wind wheel 12. The air inlet mesh 13 provides preliminary filtration of the oil smoke entering the wind wheel 12, preventing large particles of impurities from entering the motor 14. The housing 22 is detachably connected to the air inlet mesh 13 and is coaxial with the wind wheel 12, ensuring a more uniform cleaning area of ​​the cleaning fluid on the wind wheel 12.

[0056] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The specific contents of the above-mentioned specific embodiments merely represent several embodiments of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. A self-cleaning range hood, comprising a smoke inlet channel assembly (1), wherein the smoke inlet channel assembly (1) comprises a wind cabinet body (11) and a wind wheel (12), wherein the wind wheel (12) is rotatably disposed in the wind cabinet body (11), and wherein the wind wheel (12) is provided with a wind cavity (121), and wherein: The self-cleaning range hood further comprises a nozzle assembly, the nozzle assembly comprising a delivery pipe (3) for delivering cleaning liquid and a spraying portion (2) for spraying, wherein the spraying portion (2) comprises: a shell (22) connected to the smoke inlet channel assembly (1) and located in the air cavity (121); the shell (22) is provided with a liquid inlet hole (221) and a receiving cavity (222) that are in communication with each other; the liquid inlet hole (221) is in communication with one end of the delivery pipe (3); a movable nozzle (23) movable along the axial direction of the wind wheel (12); one end of the movable nozzle (23) is arranged in the accommodating cavity (222), the other end of the movable nozzle (23) extends out of the accommodating cavity (222), and at least one spray hole (231) is provided on the other end, the spray hole (231) being connected to the accommodating cavity (222); wherein the liquid inlet hole (221) is provided at the upper end of the housing (22) directly facing the movable nozzle (23); An elastic return member (24) is connected between the movable nozzle (23) and the shell (22), and the elastic return member (24) always has a tendency to push the movable nozzle (23) to move toward the accommodating chamber (222); wherein the elastic return member (24) is arranged in the accommodating chamber (222) and is connected between the movable nozzle (23) and the shell (22) in a compressed state, or the elastic return member (24) is arranged outside the accommodating chamber (222) and is connected between the movable nozzle (23) and the shell (22) in an extended state.

2. The self-cleaning range hood according to claim 1, characterized in that: The movable nozzle (23) comprises a hydraulic movable plug (232), the hydraulic movable plug (232) being slidably disposed in the accommodating cavity (222), the hydraulic movable plug (232) being provided with a pressure-bearing groove (2321) and a guide cavity (2322) that are interconnected, and the guide cavity (2322) passing through the hydraulic movable plug (232) to be connected to the spray hole (231).

3. The self-cleaning range hood according to claim 2, characterized in that: The movable nozzle (23) further comprises a diverter seat (233), the diverter seat (233) being detachably connected to one end of the hydraulic movable plug (232) extending out of the accommodating cavity (222), and the spray hole (231) being arranged on the diverter seat (233).

4. The self-cleaning range hood according to claim 3, characterized in that: The diverter seat (233) includes: A fixing member (2331) is clamped on the hydraulic movable plug (232); A flow guide (2332) detachably connected to the fixing member (2331); A guide plate (2333), the guide plate (2333) is arranged between the fixing member (2331) and the guide member (2332), at least one guide channel (2334) is formed between the guide plate (2333) and the guide member (2332), and the two ends of the guide channel (2334) are respectively connected to the guide cavity (2322) and the spray hole (231).

5. The self-cleaning range hood according to claim 4, characterized in that: The flow guide member (2332) is provided with a flow guide slope (2335), and the flow guide slope (2335) is arranged in the flow guide channel (2334).

6. The self-cleaning range hood according to claim 5, characterized in that: The diverter seat (233) is provided with two diverter channels (2334), and the two diverter channels (2334) are symmetrically arranged along the axis of the hydraulic movable plug (232).

7. The self-cleaning range hood according to claim 1, characterized in that: The housing (22) comprises a detachably connected upper housing (223) and a lower housing (224); the liquid inlet (221) is provided on the upper housing (223); the lower housing (224) is provided with a guide hole (2241); and the movable nozzle (23) is slidably inserted into the guide hole (2241).

8. The self-cleaning range hood according to claim 7, characterized in that: The movable nozzle (23) further comprises a lower cover (225), the lower cover (225) being connected to the other end of the movable nozzle (23); a concave accommodating groove (2242) being provided on a side of the lower shell (224) facing away from the accommodating cavity (222); the accommodating groove (2242) being connected to the guide hole (2241); an end of the movable nozzle (23) extending out of the accommodating cavity (222) being located in the accommodating groove (2242); and when the elastic return member (24) is in the original state, the lower cover (225) covers the accommodating groove (2242).

9. The self-cleaning range hood according to any one of claims 1 to 8, characterized in that: The injection portion (2) further comprises a flow guide cover (26) disposed in the accommodating cavity (222); the flow guide cover (26) is detachably disposed between the movable nozzle (23) and the shell (22), and surrounds one end of the movable nozzle (23) located in the accommodating cavity (222); a plurality of through flow guide holes (261) are provided on the flow guide cover (26).

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