Cleaning and smoke discharging assembly of range hood and range hood

Abstract

The utility model provides a cleaning and smoke exhausting assembly of a range hood and the range hood. The cleaning and smoke exhausting assembly of the range hood comprises a driving motor and a smoke exhausting assembly, and the net core ring assembly comprises a mounting part and a net core ring fixed on the mounting part, and the mounting part is in threaded connection with a motor shaft of the driving motor. According to the utility model, the clean core ring assembly comprises the mounting part which is in threaded connection with the motor shaft, and the clean core ring is fixed on the mounting part, so that the clean core ring assembly can be directly assembled on the motor shaft without being fixed by an additional nut, and the mounting steps of the clean smoke exhaust assembly of the range hood are simplified; and the assembly efficiency of the cleaning and smoke discharging assembly of the range hood is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of kitchen appliances, specifically relates to a clean smoke exhaust component of range hood, and further relates to a range hood provided with the clean smoke exhaust component. BACKGROUND

[0002] With the improvement of material life level, people's requirement for kitchen environment is higher and higher, and the range hood has gradually been popularized, oil fume in the kitchen is discharged to the environment by the range hood, but the oil fume usually contains oil droplet particles, and if the oil fume containing oil droplet particles is directly discharged to the environment, the environment will be polluted.

[0003] In the related art, a net core ring is usually installed in the volute of the range hood, when the range hood works, the driving motor of the range hood drives the net core ring to rotate, and centrifugal force is utilized to separate the oil fume, and the collected oil droplets are finally collected in the oil cup through the volute.

[0004] For example, a range hood is disclosed in Chinese patent application No. CN201810089833.8, which comprises a fan, the fan comprises a motor, an impeller and a net core ring, the impeller and the net core ring are installed on the motor shaft of the motor in parallel, and the impeller and the net core ring are in a split structure. However, in this scheme, another nut is needed to fix the net core ring, that is, the net core ring is first sleeved on the motor shaft, and then the nut cooperating with the motor shaft is used to position the net core ring on the motor shaft, so the installation steps are complicated and the assembly efficiency is low.

[0005] Therefore, the utility model is provided. UTILITY MODEL CONTENTS

[0006] The utility model provides a clean smoke exhaust component of range hood, install net core ring subassembly including net core ring and installation part through setting, net core ring is fixed on installation part, installation part is connected with motor shaft threadedly, net core ring group will be able to directly assemble on motor shaft, has solved the installation step of existing net core ring subassembly Complicated, the problem of low assembly efficiency.

[0007] To solve the above technical problems, the basic idea of the technical scheme of the utility model is:

[0008] A clean smoke exhaust component of range hood, comprising:

[0009] A driving motor;

[0010] A net core ring subassembly comprising an installation part and a net core ring fixed on the installation part, the installation part being threadedly connected with a motor shaft of the driving motor.

[0011] Further, the mounting portion is provided with a threaded hole, and the motor shaft is provided with an external thread matched with the internal thread of the threaded hole.

[0012] Further, the mounting portion is an integral piece, and the threaded hole is arranged on the mounting portion.

[0013] The mounting portion comprises a shaft sleeve portion and a connecting piece fixed in the shaft sleeve portion, and the threaded hole is arranged on the connecting piece.

[0014] Further, the hardness of the connecting piece is less than or equal to the hardness of the motor shaft.

[0015] Further, the connecting piece is a copper nut.

[0016] Further, the shaft sleeve portion comprises coaxially arranged:

[0017] A first connecting section, the connecting piece is arranged in the first connecting section, and the opening of the threaded hole is arranged at one end of the first connecting section.

[0018] A second connecting section arranged at the other end of the first connecting section is in the shape of a prism.

[0019] A radial protrusion is arranged between the first connecting section and the second connecting section, and a net core ring is arranged on the first connecting section or the second connecting section and connected to the radial protrusion.

[0020] Further, the rotation direction of the net core ring assembly relative to the motor shaft during installation is opposite to the rotation direction of the motor shaft during operation of the driving motor.

[0021] The net core ring assembly and the impeller mounted on the motor shaft are provided with a circumferential limiting structure.

[0022] Further, the middle part of the impeller is sleeved on the motor shaft and circumferentially limited with the motor shaft, and the mounting portion abuts against the end of the middle part of the impeller away from the motor body of the driving motor.

[0023] Further, the motor shaft is provided with a positioning column extending in the radial direction thereof, the end of the middle part of the impeller away from the net core ring assembly is provided with a positioning groove matched with the positioning column, and the positioning groove is sleeved on the positioning column.

[0024] The utility model also provides a range hood, which is provided with the cleaning and smoke exhaust assembly of the range hood.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] 1. The utility model discloses a clean core ring assembly is directly assembled on the motor shaft without fixing through the additional nut, and the installation step of the clean smoke exhaust component of the range hood is simplified, and the assembly efficiency of the clean smoke exhaust component of the range hood is improved.

[0027] 2. The utility model discloses a threaded hole is arranged on the connecting piece, and the connecting piece is screwed with the motor shaft, which can reduce the damage to the motor shaft, make the clean core ring assembly and the motor shaft cooperate closely, and effectively avoid the thread from slipping due to the material being too hard when the driving motor generates vibration during operation, and ensure the stability of the connection.

[0028] 3. In the utility model, the clean core ring assembly is used to limit the impeller in the circumferential direction, the impeller fixing nut is reduced, the installation step of the clean smoke exhaust component is further simplified, and the impeller can also limit the clean core ring assembly, avoiding damaging the thread between the motor shaft and the clean core ring assembly.

[0029] The specific implementation of the utility model will be described in further detail below with reference to the drawings. DRAWINGS

[0030] The drawings are part of the utility model and are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, but do not constitute improper limitation on the utility model. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0031] Figure 1 It is the installation structure schematic drawing of the clean core ring assembly and the driving motor in the utility model embodiment;

[0032] Figure 2 It is the top view of the installation structure of the clean core ring assembly and the driving motor in the utility model embodiment;

[0033] Figure 3 It is the sectional view of the motor shaft and the clean core ring assembly assembly place in the utility model embodiment;

[0034] Figure 4 It is the structure schematic drawing of the installation part in the utility model embodiment;

[0035] Figure 5 It is the structure schematic drawing of the motor shaft in the utility model embodiment.

[0036] Key components in the diagram: 1. Core ring assembly; 11. Core ring; 12. Mounting part; 121. Bushing part; 1211. First connecting section; 1212. Second connecting section; 1213. Radial protrusion; 1214. Rivet; 1215. First groove; 122. Connector; 1221. Threaded hole; 2. Drive motor; 21. Motor shaft; 211. Main body section; 212. Threaded section; 22. Motor body; 3. Positioning pin.

[0037] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Example 1

[0042] like Figures 1 to 5 As shown in the present invention, a cleaning and smoke extraction component for a range hood is introduced. The cleaning and smoke extraction component includes a drive motor 2, an impeller, and a cleaning ring assembly 1. The impeller and the cleaning ring assembly 1 are mounted on the motor shaft 21 of the drive motor 2. The drive motor 2 can drive the impeller and the cleaning ring assembly 1 to rotate. When the impeller rotates with the motor shaft 21, it plays the role of driving the flow of oil fumes. When the cleaning ring assembly 1 rotates with the motor shaft 21, it plays the role of purifying and blocking oil fume particles.

[0043] In this embodiment, the cleaning ring assembly 1 includes a mounting part 12 and a cleaning ring 11. The cleaning ring 11 is fixedly mounted on the mounting part 12, and the mounting part 12 is threadedly connected to the motor shaft 21 of the drive motor 2. By providing the cleaning ring assembly 1 with a mounting part 12 threadedly connected to the motor shaft 21, and fixing the cleaning ring 11 on the mounting part 12, the cleaning ring assembly 1 can be directly assembled onto the motor shaft 21 without the need for additional nuts for fixation. This simplifies the installation steps of the range hood's cleaning and smoke extraction assembly and improves the assembly efficiency of the range hood's cleaning and smoke extraction assembly.

[0044] In some possible embodiments, the motor shaft 21 is provided with a threaded hole 1221, the mounting part 12 is provided with an external thread, the external thread on the mounting part 12 is adapted to the internal thread in the threaded hole 1221, and the mounting part 12 is tightened into the threaded hole 1221 on the motor shaft 21.

[0045] The threaded hole 1221 can be directly set at the end of the motor shaft 21, or a columnar structure can be set at the end of the motor shaft 21. The columnar structure is coaxial with the motor shaft 21 and is welded to or integrally formed with the motor shaft 21. The threaded hole 1221 is set at the end of the columnar structure away from the drive motor 2.

[0046] In some other possible embodiments, the mounting part 12 is provided with a threaded hole 1221, and the motor shaft 21 is provided with an external thread. The external thread on the motor shaft 21 is adapted to the internal thread in the threaded hole 1221. The mounting part 12 is sleeved and tightened on the motor shaft 21 through the threaded hole 1221.

[0047] In some possible embodiments, the mounting portion 12 is a single piece, and the threaded hole 1221 is provided on the mounting portion 12.

[0048] Specifically, the mounting part 12 is made of a uniform material, and the threaded hole 1221 is coaxially disposed on the mounting part 12, extending axially from the end of the mounting part 12 closest to the drive motor 2. The mounting part 12 can be made of metal or plastic. Preferably, the mounting part 12 is made of stainless steel.

[0049] In this embodiment, the hardness of the mounting part 12 is less than or equal to the hardness of the motor shaft 21.

[0050] Preferably, in this embodiment, both the mounting part 12 and the motor shaft 21 are made of stainless steel.

[0051] In some other possible embodiments, the mounting portion 12 includes a bushing portion 121 and a connector 122 fixed inside the bushing portion 121, with a threaded hole 1221 provided on the connector 122.

[0052] Specifically, the connector 122 is embedded in the bushing portion 121, and the connector 122 is fixedly connected to the bushing portion 121. The mounting portion 12 is threadedly connected to the motor shaft 21 through the connector 122.

[0053] In some possible embodiments, the bushing portion 121 and the connector 122 are separately manufactured parts. One end of the bushing portion 121 is provided with a groove, and the connector 122 is embedded in the groove. The connector 122 and the bushing portion 121 are fixed together by a radially extending screw.

[0054] In some possible embodiments, the connector 122 is provided with a first threaded hole, and the motor shaft 21 is provided with a first external thread that mates with the first threaded hole, and the connector 122 is tightened onto the motor shaft 21; the bushing portion 121 is provided with a second threaded hole, and the outer peripheral wall of the connector 122 is provided with a second external thread that mates with the second threaded hole, and the bushing portion 121 is tightened onto the connector 122.

[0055] Preferably, in this embodiment, during installation, the connector 122 and the bushing 121 can be installed sequentially, or the connector 122 can be at least partially screwed into the second threaded hole of the bushing 121 first, and then the assembled mounting part 12 can be tightened onto the motor shaft 21. In this embodiment, the first external thread and the second external thread have the same direction of rotation, and the tightening direction of the mounting part 12 is opposite to the rotation direction of the motor shaft 21.

[0056] Preferably, in this embodiment, the bushing portion 121 and the connector 122 can be fixed by die casting. Specifically, the connector 122 is a separate component, and during the die casting process of the bushing portion 121, the connector 122 is placed as an insert into the die casting mold of the bushing portion 121.

[0057] Preferably, in this embodiment, the connector 122 is a cylindrical structure, and a through hole is provided in the middle of the connector 122. At least a portion of the inner wall of the through hole is provided with internal threads. Alternatively, a blind hole is provided in the middle of the connector 122, and at least a portion of the inner wall of the blind hole is provided with internal threads.

[0058] Preferably, in this embodiment, the outer peripheral wall of the connector 122 is provided with grooves and / or patterns and / or protrusions to increase the connection stability between the connector 122 and the bushing 121 during the die casting process.

[0059] Preferably, in this embodiment, the outer peripheral wall of the connector 122 is provided with at least two annular grooves.

[0060] In this embodiment, the hardness of the connector 122 is less than or equal to the hardness of the motor shaft 21.

[0061] Preferably, in this embodiment, the hardness of the connector 122 is slightly less than that of the motor shaft 21. The threaded connection between the connector 122 and the motor shaft 21 reduces damage to the motor shaft 21 and ensures a tight fit between the core ring assembly 1 and the motor shaft 21. Furthermore, when vibration occurs during the operation of the drive motor 2, it effectively prevents thread stripping due to excessively hard material, ensuring the stability of the connection.

[0062] Preferably, in this embodiment, the motor shaft 21 is made of stainless steel and the connector 122 is made of copper.

[0063] In this embodiment, the connector 122 is a copper cylindrical part with an internal thread in the middle. Specifically, the connector 122 can be a copper nut.

[0064] In this embodiment, at least one section of the bushing 121 is prismatic, which makes it convenient for the operator to tighten the mounting part 12 onto the motor shaft 21.

[0065] In some specific embodiments, the bushing portion 121 includes a first connecting section 1211 and a second connecting section 1212, wherein the first connecting section 1211 and the second connecting section 1212 are integrally formed and coaxially arranged.

[0066] Specifically, such as Figures 2 to 4 As shown, the first connecting segment 1211 is located near the drive motor 2, the connector 122 is located within the first connecting segment 1211, and the threaded hole 1221 is located on the connector 122. The second connecting segment 1212 is located at the end of the first connecting segment 1211 away from the drive motor 2, and is prismatic in shape for operation by a person. Preferably, the vertical cross-section of the outer peripheral wall of the second connecting segment 1212 is a regular hexagon.

[0067] Specifically, the opening of the threaded hole 1221 is located at one end of the first connecting section 1211, and the second connecting section is located at the other end of the first connecting section 1211. The motor shaft is assembled with the core ring assembly through the opening of the threaded hole 1221. During the assembly process, a tool (such as a wrench) can be used to turn the core ring assembly 1 from the second connecting section 1212 to lock it onto the motor shaft.

[0068] In this embodiment, a radial protrusion 1213 is provided between the first connecting segment 1211 and the second connecting segment 1212. The radial protrusion 1213 protrudes outward along the radial direction of the bushing portion 121. The core ring 11 is sleeved on the first connecting segment 1211 or the second connecting segment 1212. The middle part of the core ring 11 fits against the side of the radial protrusion 1213 facing the first connecting segment 1211 and is connected to each other.

[0069] In this embodiment, the outer peripheral wall of the first connecting segment 1211 can be a cylindrical surface, a prism surface, or a frustum surface.

[0070] Preferably, in this embodiment, the outer peripheral wall of the first connecting segment 1211 is a cylindrical surface, and the central hole of the core ring 11 is a circular hole, the inner diameter of which is greater than or equal to the outer diameter of the first connecting segment 1211.

[0071] More preferably, the outer diameter of the first connecting segment 1211 is the same as the inner diameter of the net core ring 11.

[0072] Preferably, in this embodiment, the core ring 11 and the radial protrusion 1213 can be integrally formed, welded, or connected by rivets 1214.

[0073] In this embodiment, a plurality of rivet 1214 holes are provided in the middle of the core ring 11. The plurality of rivet 1214 holes are evenly arranged around the axis of the core ring 11. A plurality of rivets 1214 are provided on the radial protrusion 1213, which correspond one-to-one with each rivet 1214 hole. The radial protrusion 1213 is connected to the core ring 11 through the rivets 1214.

[0074] Alternatively, the radial protrusion 1213 is provided with a plurality of rivet 1214 holes evenly arranged around the axis of the mounting part 12, and the center of the core ring 11 is provided with a plurality of rivets 1214 corresponding one-to-one with each rivet 1214 hole, and the core ring 11 is connected to the radial protrusion 1213 through the rivets 1214.

[0075] In this embodiment, the core ring 11 is a mesh structure fixed on the mounting part 12. The core ring 11 and the mounting part 12 are coaxially arranged. Preferably, the core ring 11 is a mesh extending radially along the mounting part 12.

[0076] Specifically, the core ring 11 can be any structured core ring in the prior art. For example, the core ring 11 can be the core ring with the structure shown in the invention patent with application number "CN202110574455.4" entitled "Core Ring and Range Hood", or it can be the "core mesh" with the structure shown in the Chinese utility model patent with application number "CN201721269225.2" entitled "A Core Mesh for Purifying Oil Fumes and Range Hood".

[0077] In this embodiment, the threaded connection structure between the mounting part 12 and the motor shaft 21 will not loosen due to the driving force of the motor shaft 21, so that the cleaning and smoke exhaust assembly can work stably.

[0078] In this embodiment, the rotation direction of the core ring assembly 1 relative to the motor shaft 21 during installation is opposite to the rotation direction of the motor shaft 21 when the drive motor 2 is working. Therefore, during the rotation of the core ring assembly 1 driven by the motor shaft 21, the threaded connection between the motor shaft 21 and the core ring assembly 1 will not loosen. Furthermore, the driving force of the motor shaft 21 on the core ring assembly 1 increases the tightening force between them, making the assembly more stable. In this embodiment, an axial limiting structure is provided between the motor shaft 21 and the core ring 11, causing the end face of the motor shaft 21 to abut against each other, thus securely tightening the core ring 11 onto the motor shaft 21.

[0079] And / or, a circumferential limiting structure is provided between the core ring assembly 1 and the impeller mounted on the motor shaft 21. Specifically, the circumferential limiting fit between the motor shaft 21 and the impeller allows for circumferential limiting between the motor shaft 21 and the core ring 11 after the impeller and core ring assembly 1 are mounted on the motor shaft 21. This prevents the threaded connection between the two from loosening and simplifies the structure of the motor shaft 21.

[0080] In this embodiment, the motor shaft 21 is threadedly connected between the impeller and the mounting portion 12 of the core ring assembly 1.

[0081] Specifically, in this embodiment, the motor shaft 21 includes a main body section 211 and a threaded section 212 coaxially arranged. The main body section 211 and the threaded section 212 are integrally formed structures, and the main body section 211 and the threaded section 212 are arranged sequentially in a direction away from the motor body 22.

[0082] The main body section 211 is provided with a positioning post 3, which extends radially along the motor shaft 21. The middle part of the impeller is sleeved on the main body section 211. The positioning post 3 achieves circumferential positioning between the impeller and the motor shaft 21. The core ring assembly 1 is installed on the threaded section 212.

[0083] In this embodiment, an impeller fixing nut is also provided on the threaded section 212, and the impeller is fixed by the impeller fixing nut.

[0084] Preferably, in this embodiment, the end of the mounting part 12 abuts against the middle of the impeller to achieve axial positioning of the impeller.

[0085] like Figures 1 to 5As shown, in some specific embodiments, a bushing is provided in the middle of the impeller. The bushing is sleeved on the main body section 211 of the motor shaft 21. The end of the bushing near the motor body 22 abuts against the positioning post 3, and a positioning groove is provided on the bushing at the position abutting against the positioning post 3. The bushing is sleeved on the outer periphery of the positioning post 3 through the positioning groove, realizing circumferential limiting between the bushing and the motor shaft 21. Preferably, the positioning post 3 can be a positioning pin.

[0086] The core ring assembly 1 is installed on the threaded section 212 of the motor shaft 21. Specifically, the core ring assembly 1 rotates relative to the motor shaft 21 in a first direction, causing the core ring assembly 1 to move along the external thread on the threaded section 212 towards the motor body 22, until the end of the mounting part 12 of the core ring assembly 1 near the motor body 22 abuts against the end of the impeller bushing away from the motor body 22, and the end face of the mounting part 12 and the end face of the bushing press against each other to achieve tightening.

[0087] During the operation of the drive motor 2, the impeller and the core ring assembly 1 are driven to rotate synchronously in a second direction through the motor shaft 21. The second direction is opposite to the first direction.

[0088] In this embodiment, the positioning post 3 is positioned close to the motor body 22.

[0089] Preferably, in this embodiment, the outer diameter of the main body segment 211 is larger than the outer diameter of the threaded segment 212, the outer diameter of the end of the mounting part 12 near the motor body 22 is larger than the outer diameter of the main body segment 211, and the end of the mounting part 12 facing the motor body 22 has a first area that abuts against the end face of the main body segment 211 and a second area that abuts against the end face of the bushing. That is, when the core ring assembly 1 is tightened, the end of the mounting part 12 abuts against the end face of the main body segment 211 and the bushing at the same time.

[0090] Preferably, in this embodiment, when the core ring assembly 1 is tightened on the motor shaft 21, the end face of the connector 122 abuts against the end face of the main body section 211, and the end face of the bushing portion 121 abuts against the bushing of the impeller.

[0091] Preferably, in this embodiment, a first groove 1215 is provided at the end of the bushing portion 121 away from the drive motor 2. The first groove 1215 is recessed along the axial direction of the bushing portion 121 from the end face of the end of the bushing portion 121 away from the drive motor 2. The first groove 1215 can reduce the weight of the core ring assembly 1. The first groove 1215 is coaxial with the bushing portion 121, the radial cross-section of the first groove 1215 is circular, and the inner diameter of the first groove 1215 gradually decreases along the direction closer to the drive motor 2.

[0092] In this embodiment, after the cleaning and smoke extraction assembly is assembled, the clean core ring 11 is shaped to match the end of the impeller away from the motor body 22 and is positioned close to the end of the impeller away from the motor body 22.

[0093] In some possible embodiments, the core ring 11 is fitted to the end face of the impeller, and a circumferential limiting structure is provided between the core ring 11 and the end face of the impeller. The circumferential limiting structure can be a screw structure or a protruding column structure provided between the impeller end face and the core ring 11.

[0094] In some possible embodiments, the outer diameter of the core ring 11 is less than or equal to the inner diameter of the impeller, and the core ring 11 is disposed on the inner circumference of the impeller.

[0095] Example 2

[0096] This embodiment describes a range hood, which is equipped with the cleaning and smoke extraction component of the range hood described in Embodiment 1 above.

[0097] In some specific embodiments, the range hood also includes a volute, with the motor shaft 21 of the drive motor 2 extending into the volute. The impeller and the cleaning ring assembly 1 are mounted on the motor shaft 21, and the cleaning ring assembly 1 is close to the air inlet of the volute. The drive motor 2 drives the impeller and the cleaning ring assembly 1 to rotate. When the fumes enter the volute from the air inlet, they flow through the cleaning ring 11. As the cleaning ring 11 rotates with the motor shaft 21, it plays a role in purifying and blocking the fumes particles, and uses centrifugal force to separate the fumes. The collected oil finally flows into the oil cup through the volute.

[0098] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A cleaning and smoke extraction component for a range hood, characterized in that, include: Drive motor (2); The core ring assembly (1) includes a mounting part (12) and a core ring (11) fixed on the mounting part (12). The mounting part (12) is threadedly connected to the motor shaft (21) of the drive motor (2).

2. The cleaning and smoke extraction assembly of the range hood according to claim 1, characterized in that, The mounting part (12) is provided with a threaded hole (1221), and the motor shaft (21) is provided with an external thread for engaging with the internal thread of the threaded hole (1221).

3. The cleaning and smoke extraction assembly of the range hood according to claim 2, characterized in that, The mounting part (12) is a single piece, and the threaded hole (1221) is provided on the mounting part (12); or, The mounting part (12) includes a bushing part (121) and a connector (122) fixed inside the bushing part (121), and a threaded hole (1221) is provided on the connector (122).

4. The cleaning and smoke extraction assembly of the range hood according to claim 3, characterized in that, The hardness of the connector (122) is less than or equal to the hardness of the motor shaft (21).

5. The cleaning and smoke extraction assembly of the range hood according to claim 4, characterized in that, The connector (122) is a copper nut.

6. The cleaning and smoke extraction assembly of a range hood according to any one of claims 3 to 5, characterized in that, The bushing portion (121) includes a coaxially arranged: The first connecting section (1211) has a connector (122) disposed within it, and the opening of the threaded hole (1221) is disposed at one end of the first connecting section (1211). The second connecting segment (1212) is located at the other end of the first connecting segment (1211) and is prismatic in shape; A radial protrusion (1213) is disposed between the first connecting section (1211) and the second connecting section (1212). A core ring (11) is sleeved on the first connecting section (1211) or the second connecting section (1212) and connected to the radial protrusion (1213).

7. The cleaning and smoke extraction assembly of a range hood according to any one of claims 1 to 5, characterized in that, When the core ring assembly (1) is installed, its rotation direction relative to the motor shaft (21) is opposite to the rotation direction of the motor shaft (21) when the drive motor (2) is working; and / or, A circumferential limiting structure is provided between the core ring assembly (1) and the impeller mounted on the motor shaft (21).

8. The cleaning and smoke extraction assembly of a range hood according to any one of claims 1 to 5, characterized in that, The middle part of the impeller is sleeved on the motor shaft (21) and is circumferentially limited to the motor shaft (21). The mounting part (12) abuts against the end of the motor body (22) of the middle part of the impeller away from the drive motor (2).

9. The cleaning and smoke extraction assembly of the range hood according to claim 8, characterized in that, A positioning post (3) extending radially is provided on the motor shaft (21). A positioning groove that cooperates with the positioning post (3) is provided at the middle end of the impeller away from the core ring assembly (1). The positioning groove is fitted on the positioning post (3).

10. A range hood, characterized in that, The range hood is equipped with a cleaning and smoke extraction assembly as described in any one of claims 1 to 9.

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