Centrifugal fan blade for dust removal device and dust removal device

Abstract

The embodiment of the utility model relates to the technical field of fans, in particular to a centrifugal fan blade for a dust removal device and the dust removal device, the centrifugal fan blade for the dust removal device comprises a chassis and a blade module, and the chassis is used for being installed on a power shaft of a wind pressure motor; the blade module comprises a plurality of first blades and a plurality of second blades, the first blades and the second blades are arranged on the chassis, and the first blades and the second blades are used for generating air pressure during rotation; wherein the multiple first blades are arranged at intervals in the axis direction of the power shaft, the multiple second blades are arranged at intervals in the axis direction of the power shaft, and at least part of the first blades and at least part of the second blades are distributed at intervals in the direction perpendicular to the axis of the power shaft. The projection length of the first blade is larger than that of the second blade. By means of the mode, the cavity space can be effectively utilized by the first blades and the second blades, and therefore the air guiding effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and in particular to a centrifugal fan blade for a dust removal device and a dust removal device. Background Art

[0002] Multi-blade centrifugal fan is a type of centrifugal fan. Because the impeller used in this fan is a multi-blade fan, its working principle is the same as that of a conventional centrifugal fan, but the number of blades of the fan is generally more than that of a conventional centrifugal fan. Multi-blade centrifugal fan has the characteristics of high pressure coefficient, large flow coefficient and low noise, and is widely used in cooling and ventilation of air conditioning equipment and household appliances. According to the different materials used for the fan blades, the multi-blade centrifugal fan blades used in dust removal devices can be divided into metal and non-metal. Metal fan blades have good strength and can operate at high speeds, but because metal fan blades cannot be designed with airfoils, the noise is relatively high; non-metal fan blades can be designed with airfoils, with low noise and less flow separation, but the strength of non-metal fan blades is poor and the operating speed is relatively low.

[0003] However, the inventor of the present utility model discovered during the implementation of the present utility model that the conventional centrifugal fan blades used in dust removal devices have poor air guiding effects when the cavity diameter is small. Utility Model Content

[0004] The main technical problem solved by the embodiment of the utility model is to provide a centrifugal fan blade for a dust removal device, wherein the projected length of the first blade is greater than the projected length of the second blade, and the first blade and the second blade are arranged in a long and short interval manner to effectively utilize the cavity space, thereby enhancing the wind guiding effect.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a centrifugal fan blade for a dust removal device, including a chassis and a blade module, wherein the chassis is used to be installed on the power shaft of the wind pressure motor; the blade module includes a plurality of first blades and a plurality of second blades, the first blades and the second blades are arranged on the chassis, and the first blades and the second blades are used to generate air pressure during rotation; wherein, the plurality of first blades are arranged at intervals around the axial direction of the power shaft, the plurality of second blades are arranged at intervals around the axial direction of the power shaft, and at least part of the first blades and at least part of the second blades are distributed at intervals, and in the axial direction perpendicular to the power shaft, the projection length of the first blade is greater than the projection length of the second blade.

[0006] Optionally, the number of the first blades and the number of the second blades are the same, and a plurality of the first blades and a plurality of the second blades are arranged in sequence and evenly spaced apart.

[0007] Optionally, the chassis has a fixing surface, the first blade and the second blade are fixed to the fixing surface, and the fixing surface is protruded toward the blade module in the axial direction of the power shaft.

[0008] Optionally, the main body of the chassis is a thin-walled structure.

[0009] Optionally, the chassis is provided with an assembly column, the assembly column is provided with an assembly hole, and the assembly hole is used for assembly and fixation with the power shaft.

[0010] Optionally, in the axial direction perpendicular to the power shaft, the first blade and the second blade have a first side located upstream and a second side located downstream, in the axial direction of the power shaft, the distance from the first side to the chassis is greater than the distance from the second side to the chassis, and in the axial direction perpendicular to the power shaft, the distance from the first side to the axis is less than the distance from the second side to the axis.

[0011] Optionally, in a direction perpendicular to the axis of the power shaft, a distance from a first side of the first blade to the axis of the power shaft is greater than a distance from a first side of the second blade to the axis of the power shaft.

[0012] Optionally, the first blade and the second blade have a fixed end and a wind-cutting end in the axial direction of the power shaft, the fixed end is fixed to the chassis, and the wind-cutting end is used to receive the airflow; wherein, in the axial direction perpendicular to the power shaft, the distance from the wind-cutting end to the axis of the power shaft is greater than the distance from the fixed end to the axis of the power shaft.

[0013] Optionally, in a direction perpendicular to the axis of the power shaft, a maximum distance from the blade module to the axis of the power shaft is greater than a maximum distance from the chassis to the axis of the power shaft.

[0014] In order to solve the above-mentioned technical problems, another technical solution adopted by the utility model is: to provide a dust removal device, including the above-mentioned centrifugal fan blades for dust removal device and a shell, a wind pressure motor and an air guide member, the shell is provided with a cavity, the cavity has a dust suction port connected to the outside, the centrifugal fan blades for dust removal device, the wind pressure motor and the air guide member are accommodated in the cavity and fixed to the shell, and the chassis is fixed on the power shaft of the wind pressure motor; the air guide member is provided on the side of the centrifugal fan blades for dust removal device away from the wind pressure motor, and the air guide member is provided with a first groove and a second groove connected on both sides of the axial direction of the power shaft, the first groove is used to concentrate the airflow from a direction perpendicular to the axial direction of the power shaft, so as to guide the airflow to the centrifugal fan blades for dust removal device, and the second groove is used to form an airway with the blade module and the chassis.

[0015] The beneficial effects of the embodiment of the utility model are: different from the prior art, in the embodiment of the utility model, the projection length of the first blade is greater than the projection length of the second blade, and the first blade and the second blade are arranged in a long and short interval manner to effectively utilize the cavity space, thereby enhancing the wind guiding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0017] Figure 1 It is a first stereoscopic schematic diagram of a centrifugal fan blade for a dust removal device according to an embodiment of the utility model;

[0018] Figure 2 It is an orthographic projection view of a centrifugal fan blade for a dust removal device according to an embodiment of the utility model;

[0019] Figure 3 yes Figure 2 Schematic diagram of the section along AA;

[0020] Figure 4 It is a second stereoscopic schematic diagram of a centrifugal fan blade for a dust removal device according to an embodiment of the utility model;

[0021] Figure 5 It is a three-dimensional schematic diagram of the dust removal device of an embodiment of the utility model;

[0022] Figure 6 yes Figure 5 Schematic diagram of the section along BB;

[0023] Figure 7 yes Figure 6 The enlarged view of the C part in FIG.

[0024] Figure 8 It is a three-dimensional schematic diagram of the installation unit of the embodiment of the utility model;

[0025] Fig. 9 yes Figure 8 Schematic diagram of the section along DD;

[0026] Fig.10 It is a three-dimensional schematic diagram of the installation cover of an embodiment of the utility model;

[0027] Fig.11 It is a three-dimensional schematic diagram of the air guide member of the embodiment of the utility model.

[0028] 1. Centrifugal fan blades for dust removal device; 100. chassis; 110. assembly hole; 120. fixing surface; 130. assembly column; 131. installation bevel; 200. blade module; 210. first blade; 220. second blade; 201. first side; 202. second side; 203. fixing end; 204. wind cutting end; 2. dust removal device; 1. Centrifugal fan blades for dust removal device; 20. housing; 21. cavity; 21a. dust suction port; 30. wind pressure motor; 31. power shaft; 40. air guide; 41. first groove; 42. second groove; 50. installation unit; 51. mounting seat; 52. mounting cover; 52a. through hole; 52b. heat dissipation hole; 53. connecting element; 54. mounting cylinder; 60. cleaning accessories; 70. first driving source; 80. filter module. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0031] See also Figures 1 to 4The embodiment of the present application provides a centrifugal fan blade 1 for a dust removal device (hereinafter directly described as a centrifugal fan blade 1), including a chassis 100 and a blade module 200, the chassis 100 is used to be installed on the power shaft 31 of the wind pressure motor 30, the blade module 200 includes a plurality of first blades 210 and a plurality of second blades 220, the first blades 210 and the second blades 220 are arranged on the chassis 100, and the first blades 210 and the second blades 220 are used to generate air pressure when rotating. Among them, the plurality of first blades 210 are arranged at intervals around the axial direction of the power shaft 31, and the plurality of second blades 220 are arranged at intervals around the axial direction of the power shaft 31, and at least part of the first blades 210 and at least part of the second blades 220 are distributed at intervals, and in the direction perpendicular to the axial direction of the power shaft 31, the projected length of the first blade 210 is greater than the projected length of the second blade 220. It should be noted that in the embodiment of the present application, in order to describe the axis mentioned in the orientation, unless otherwise specified, refers to the rotation axis of the chassis 100 when it rotates, that is, the center axis of the cone of the conical side wall of the chassis 100, and in the embodiment of the present application, the chassis 100 and the power shaft 31 are coaxially arranged, that is, in the embodiment of the present application, the axis of the chassis 100 is also the axis of the power shaft 31, and in other embodiments of the present application, when the chassis 100 is not conical, the axis should correspond to the rotation axis of the chassis 100, which is also the center axis of the power shaft 31.

[0032] For the above-mentioned chassis 100, the main body of the chassis 100 is in the shape of a conical side wall and an assembly hole 110 is provided in the center. The angle between the side wall of the cone and the axis is 63°. The chassis 100 has a fixed surface 120, and the fixed surface 120 is in the shape of a conical side wall. The first blade 210 and the second blade 220 are fixed to the fixed surface 120. The fixed surface 120 is protruded toward the blade module 200 in the axial direction of the power shaft 31. The chassis 100 is mounted on the power shaft 31 of the wind pressure motor 30 through the assembly hole 110. It should be noted that in the embodiment of the present application, the chassis 100 has a circular projection on the axis, which can ensure the rotation of the centrifugal fan blade 1 while obtaining a larger area, thereby increasing the installation area of ​​the first blade 210 and the second blade 220, and the chassis 100 is set in a conical side wall shape, which can increase the area of ​​the fixing surface 120 on the same projection area, thereby increasing the installation area of ​​the first blade 210 and the second blade 220, and then increasing the contact area between the centrifugal fan blade 1 and the airflow, and increasing the airflow guidance effect. However, in other embodiments of the present application, the projection of the chassis 100 on the axis can be elliptical or polygonal, and when the installation space is sufficient, the chassis 100 can also be a flat plate structure, and its main structure is not tilted or raised on the axis, or when the weight is not considered, the chassis 100 is directly set in a solid cone or spherical structure. On the other hand, the chassis 100 can also be set in a raised structure such as a spherical surface to achieve the purpose of increasing the area of ​​the fixing surface 120. When the chassis 100 is in the form of a conical side wall, the angle between the side wall of the cone and the axis is not limited, and can also be 15°, 23°, 35°, 45°, 75°, etc.

[0033] For the above blade module 200, the blade module 200 includes 5 first blades 210 and 5 second blades 220, and the 5 first blades 210 and the 5 second blades 220 are respectively arranged in a circular array around the axis, and the first blades 210 and the second blades 220 are arranged in sequence at intervals, and in the direction perpendicular to the axis, the projection length of the first blade 210 on the chassis 100 is greater than the projection length of the second blade 220 on the chassis 100. And the first blade 210 and the second blade 220 are both arc-shaped, and the first blade 210 and the second blade 220 are arranged in an arc shape, which can be designed to be longer on the same chassis 100 size, thereby increasing the contact area between the blade module 200 and the wind. The grouping design of the first blade 210 and the second blade 220, both of which are 5 blades, can ensure the space of the blade module 200 and the airflow inlet when the cross-sectional size of the blade is small, and also increase the guide area of ​​the blade module 200. It should be noted that the present application limits the number of the first blade 210 and the second blade 220. In other embodiments of the present application, the number of the first blade 210 and the second blade 220 can be 3, 6 or 9. It should also be noted that in the embodiment of the present application, in order to simplify the structure and facilitate processing, the blade module 200 is composed of the first blade 210 and the second blade 220, but the present application does not limit this. In other embodiments of the present application, the blade module 200 can also include a third blade or a fourth blade. It should also be noted that in order to make the airflow more uniform and balanced, the first blades 210 and the second blades 220 are arranged in a circular array and spaced apart in sequence, but the present application is not limited to this. In other embodiments of the present application, multiple first blades 210 and multiple second blades 220 can be arranged on the chassis 100 in an irregular manner so that at least some of the first blades 210 and the second blades 220 are spaced apart.

[0034] Preferably, in the flow direction of the airflow, the first blade 210 and the second blade 220 have a first side 201 located upstream, and a second side 202 located downstream. In the axial direction, the distance from the first side 201 to the chassis 100 is greater than the distance from the second side 202 to the chassis 100, and the distance from the first side 201 to the axis is less than the distance from the second side 202 to the axis. This design can increase the contact area between the first side 201 and the airflow when cutting the wind, thereby increasing the restraining force of the airflow, thereby pushing more airflow into the airway between the blade modules 200. On the other hand, the height of the airflow flowing from the first side 201 to the second side 202 gradually decreases, and the restraining ability of the blade module 200 on the airflow gradually decreases, releasing part of the energy of the airflow, reducing the collision kinetic energy of the airflow flowing out of the fan blade and the outer casing 20, reducing the loss of airflow energy, and improving the air outlet efficiency.

[0035] Preferably, the end surfaces of the second side 202 of the first blade 210 and the second side 202 of the second blade 220 are both arc-shaped and are arcs of the same circle, the distance from the first side 201 of the first blade 210 to the axis is smaller than the distance from the first side 201 of the second blade 220 to the axis, and in the direction perpendicular to the axis, the distances from the first blade 210 and the second blade 220 on the same diameter of the chassis 100 to the chassis 100 are the same. On the other hand, the grouping design of the blades can also perform secondary diversion of the airflow, so that the airflow is more evenly dispersed when passing through the centrifugal fan blade 1, and the wind loss is further reduced.

[0036] Preferably, in the axial direction perpendicular to the power shaft 31, the distance from the first side 201 of the first blade 210 to the axis of the power shaft 31 is greater than the distance from the first side 201 of the second blade 220 to the axis of the power shaft 31. This design not only ensures the space between the blade module 200 and the airflow inlet, but also increases the guide area of ​​the blade, and allows the blade module 200 to perform secondary diversion of the airflow, making the airflow guidance more uniform and the air pressure loss smaller.

[0037] Preferably, the first blade 210 and the second blade 220 have a fixed end 203 and a wind-cutting end 204 in the axial direction of the power shaft 31, the fixed end 203 is fixed to the chassis 100, the wind-cutting end 204 is used to receive the airflow, and in the axial direction perpendicular to the power shaft 31, the distance from the wind-cutting end 204 to the axis of the power shaft 31 is greater than the distance from the fixed end 203 to the axis of the power shaft 31. The first side 201 of the first blade 210 and the second blade 220 is designed in an inclined manner so that it is easy to receive the airflow while ensuring the installation strength of the first blade 210 and the second blade 220 on the chassis 100.

[0038] Preferably, in order to reduce the weight of the centrifugal fan blade 1, in the axial direction, a portion of the blade module 200 is extended out of the chassis 100, that is, in the axial direction perpendicular to the power shaft 31, the maximum distance from the blade module 200 to the axis of the power shaft 31 is greater than the maximum distance from the chassis 100 to the axis of the power shaft 31. The blade module 200 is arranged in an outwardly inclined manner, which can reduce the projection area of ​​the chassis 100 while ensuring the same flow guide area, that is, reduce the volume of the chassis 100, thereby reducing the weight of the centrifugal fan blade 1 and the weight of the dust removal device 2, so as to facilitate the user's mobile use and improve the user experience.

[0039] Preferably, the chassis 100 is provided with an assembly column 130, and the assembly column 130 is provided with an assembly hole 110, and the assembly hole 110 is used for assembly and fixing with the power shaft 31. The design of the assembly column 130 can ensure the installation strength between the chassis 100 and the power shaft 31 when the chassis 100 is a thin-walled structure. It should be noted that in the above description, the chassis 100 is a conical sidewall thin-walled structure as the main structure, and the assembly column 130 on the chassis 100 is a detailed structure, and the description does not contradict each other.

[0040] Preferably, to facilitate the installation between the centrifugal fan blade 1 and the wind pressure motor 30, a mounting angle 131 is provided on the side of the assembly hole 110 close to the wind pressure motor 30, so that the centrifugal fan blade 1 can be better mounted on the power shaft 31 of the wind pressure motor 30, thereby facilitating production, reducing assembly time during production, and further reducing production costs.

[0041] Preferably, the chassis 100 is provided with reinforcing ribs on the side of the axis away from the centrifugal fan blade 1, so as to increase the strength of the centrifugal fan blade 1 and prevent the centrifugal fan blade 1 from deforming due to force under the action of wind pressure, thereby affecting the guide effect of the centrifugal fan blade 1 and causing damage.

[0042] In the embodiment of the present application, the projected length of the first blade 210 is greater than the projected length of the second blade 220. The first blade 210 and the second blade 220 are arranged in a long and short interval manner to effectively utilize the space of the cavity 21, thereby enhancing the wind guiding effect.

[0043] The utility model also provides a dust removal device 2, see Figure 5 and Figure 6 , including the centrifugal fan blade 1 and the housing 20, the wind pressure motor 30 and the air guide 40, the housing 20 is provided with a cavity 21, the cavity 21 has a dust suction port 21a connected to the outside, the centrifugal fan blade 1, the wind pressure motor 30 and the air guide 40 are accommodated in the cavity 21 and fixed to the housing 20, and the chassis 100 is fixed on the power shaft 31 of the wind pressure motor 30. The air guide 40 is arranged on the side of the centrifugal fan blade 1 away from the wind pressure motor 30, and the air guide 40 is provided with a first groove 41 and a second groove 42 connected on both sides of the axis direction of the power shaft 31, the first groove 41 is used to concentrate and gather airflow from a direction perpendicular to the axis of the power shaft 31, so as to guide the airflow to the centrifugal fan blade 1, and the second groove 42 is used to form an airway with the blade module 200 and the chassis 100.

[0044] For the above housing 20, see Figure 5 and Figure 6The shell 20 is a slender cylindrical shell structure with a diameter of about 2.5 cm and a length of about 15 cm. The shell wall of the shell 20 has a uniform overall thickness. A cylindrical cavity 21 is provided inside the shell 20. The cavity 21 has a dust suction port 21a connected to the outside. The dust suction port 21a is provided at the end of the shell 20. The cross-sectional shape of the dust suction port 21a is circular and the axes of the dust suction port 21a and the cavity 21 are in the same straight line. It should be noted that in the embodiment of the present application, the shell 20 is in a slender cylindrical shape in order to facilitate the user to hold it. Its size and shape are slightly similar to the pen used in daily life, which is conducive to the user to clean small and precise equipment. However, the present application does not limit the specific shape of the shell 20. For example, in other embodiments of the present application, the shell 20 can be a shell structure with an elliptical cross section, or a relatively short and thick cylindrical shape with a larger diameter. In addition, if the gripping feel is not considered, the shell 20 can also be a shell structure with a polygonal cross section. It should also be noted that the present application does not limit the specific shapes of the cavity 21 and the suction port 21a. In the embodiment of the present application, the cross-section of the cavity 21 and the suction port 21a is circular in order to achieve uniform suction and keep the outer dimensions consistent without using angle differences. In addition, the wall thickness of the shell 20 can be kept consistent, thereby ensuring the overall strength of the shell 20. However, the present application does not limit the specific shapes of the cavity 21 and the suction port 21a. For example, in some embodiments of the present application, the cross-section of the cavity 21 can be elliptical or polygonal, the cross-section of the suction port 21a can be waist-shaped or rectangular, and the position of the suction port 21a can be set away from the axis of the cavity 21. It should be noted that in the embodiment of the present application, the axis of the shell 20 is the central axis direction of the cylindrical shell 20, and the airflow direction is parallel to the axis. In other embodiments of the present application, when the shell 20 is not cylindrical, the axis of the shell 20 is the extension direction of the main structure, and the airflow direction is parallel to the axis.

[0045] For the above-mentioned wind pressure motor 30, the mounting unit 50 is arranged on the outer shell 20 and is located in the cavity 21. The wind pressure motor 30 is fixedly mounted on the mounting unit 50 and accommodated in the cavity 21. The centrifugal fan blades 1 are sleeved on the power shaft 31 of the wind pressure motor 30. The wind pressure motor 30 generates wind pressure in the cavity 21 by driving the centrifugal fan blades 1 to rotate, thereby causing gas flow in the cavity 21.

[0046] For the centrifugal fan blade 1, the centrifugal fan blade 1 includes a chassis 100 and a blade module 200. The blade module 200 is fixed on the chassis 100 and is located at a side of the chassis 100 facing the dust suction port 21a.

[0047] For the above installation unit 50, see Figures 7 to 10The mounting unit 50 includes a mounting seat 51, a mounting cover 52, a connecting element 53 and a mounting cylinder 54. The mounting seat 51 is a cylindrical cavity wall structure without a top cover, and the mounting cover 52 is a cylindrical cavity wall structure without a bottom wall. The mounting seat 51 and the mounting cover 52 are coaxially arranged with the housing 20. The mounting cover 52 is plugged into the mounting seat 51. The mounting cover 52 and the mounting seat 51 jointly enclose and install the wind pressure motor 30. A through hole 52a is provided in the middle of the mounting cover 52. The power shaft 31 of the wind pressure motor 30 is plugged into the through hole 52a to extend out of the mounting cover 52 and be installed with the centrifugal fan blade 1. The connecting element 53 is a rib plate structure, and the mounting cylinder 54 is a circular columnar shell structure. The connecting element 53 is connected to the inner wall of the mounting cylinder 54 at one end in a direction perpendicular to the axis of the housing 20, and connected to the mounting seat 51 at the other end, so as to realize the installation of the second driving source on the housing 20. Furthermore, the connecting element 53 is bent in the axial direction of the housing 20, that is, the connecting element 53 is in an arc shape, and the number of the connecting elements 53 is 5, and the 5 connecting elements 53 are arranged around the mounting seat 51. The arc-shaped arrangement of the connecting element 53 can guide the gas while increasing the contact area to reduce the resistance to the airflow. It should be noted that in the present application, in order to fit the shape of the wind pressure motor 30 and the cavity 21, the outer contours of the mounting seat 51, the mounting cover 52 and the mounting cylinder 54 are arranged in a cylindrical manner to optimize the space, and keep the distance between the mounting cylinder 54 and the inner wall of the housing 20 consistent to avoid uneven wind pressure and thus resistance, but the present application does not limit this. In other embodiments of the present application, the wind pressure motor 30 can be fixedly mounted on the housing 20 in other structures to achieve fixed installation of the wind pressure motor 30. It should also be noted that the present application does not limit the specific structure and number of the connecting element 53. In other embodiments of the present application, the connecting element 53 may be a flat plate structure or a block structure with a larger cross-sectional area, and its two ends are respectively connected to the housing 20 and the mounting seat 51 to achieve the fixing of the mounting seat 51 on the housing 20. The present application also does not limit the specific number of the connecting elements 53. In other embodiments of the present application, the number of the connecting elements 53 may also be 2, 3, or 6, etc., and multiple connecting elements 53 are arranged around the mounting seat 51, or the number of the connecting elements 53 is directly set to one while ensuring the installation strength of the mounting seat 51. It should be understood that in the embodiments of the present application, in order to simplify the structure of the housing 20 and reduce the difficulty of producing the housing 20, the mounting unit 50 is an independent component, and the wind pressure motor 30 is mounted on the mounting unit 50 and then mounted on the housing 20 together, but in some embodiments of the present application, the mounting unit 50 can be integrally formed with the housing 20.

[0048] Preferably, the heat dissipation holes 52b, the mounting cover 52 is provided with 4 heat dissipation holes 52b, the heat dissipation holes 52b are in the shape of a right-angled fan as a whole, and the heat dissipation holes 52b are evenly distributed on the mounting cover 52, so that the mounting cover 52 is in a hollow structure as a whole, and the setting of the heat dissipation holes 52b is conducive to the heat dissipation of the wind pressure motor 30, which can reduce the power of the wind pressure motor 30 due to overheating due to continuous operation or damage, thereby improving the life of the dust removal device 2. It should be noted that the present application does not limit the specific number and shape of the heat dissipation holes 52b. In other embodiments of the present application, the heat dissipation holes 52b can be different shapes such as elliptical, circular or polygonal, or the mounting cover 52 is directly set to a porous grid structure.

[0049] Preferably, in order to converge and guide the airflow to the first side 201 of the centrifugal fan blade 1, the second power source further includes an air guide 40, see Fig.11 The air guide 40 is installed on the housing 20 and the position cavity 21. The air guide 40 is located upstream of the centrifugal fan blade 1 in the flow direction of the gas. The air guide 40 is used to guide the airflow in a direction perpendicular to the airflow direction. The centrifugal fan blade 1 then guides the airflow gathered by the air guide 40 to the periphery. Specifically, the air guide 40 is annular as a whole, and a conical first groove 41 and a second groove 42 are provided on both sides of the middle part in the axial direction. The first groove 41 and the second groove 42 are connected. The overall wall thickness of the air guide 40 is consistent. The air guide 40 is a gyroscope formed by rotating the axis near the sharp corner in the shape of a ">". The outer side of the air guide 40 is provided with reinforcing ribs, so as to increase the strength of the air guide 40 and prevent the air guide 40 from being deformed under the action of wind pressure, thereby affecting the convergence of the air guide 40. In the flow direction of the gas, the first groove 41 is located upstream of the second groove 42, and the first groove 41 is used to concentrate the airflow from a direction perpendicular to the axis, so that the airflow is directed to the first side 201 of the centrifugal fan blade 1, avoiding the wind loss caused by the dispersion of the airflow. The second groove 42 is used to form an airway between the blade and the centrifugal fan blade 1, so as to guide the airflow before entering the blade, further facilitating the gas flow and reducing the wind loss. It should be understood that the present application does not limit the specific structure of the air guide 40. For example, in other embodiments of the present application, the first groove 41 and the second groove 42 can be spherical or other shapes, or in other embodiments of the present application, the air guide 40 can be divided, that is, the air guide 40 is two elements, and the first groove 41 and the second groove 42 are respectively arranged on two parts, and in some embodiments of the present application, without considering the weight of the air guide 40, the air guide 40 can also be a solid gyroid structure.

[0050] Furthermore, the dust removal device 2 also includes a cleaning accessory 60, a first driving source 70 and a filtering module 80. The cleaning accessory 60 is arranged in the cavity 21 and partially extends out of the dust suction port 21a, and the cleaning accessory 60 cleans the surface to be cleaned by movement. The first driving source 70 is arranged in the cavity 21, and the first driving source 70 is used to drive the cleaning accessory 60 to move. The filtering module 80 is arranged in the cavity 21, and the filtering module 80 is used to filter solid waste from the airflow. The wind pressure motor 30 is used to provide wind pressure so that external waste can enter the cavity 21 through the dust suction port 21a.

[0051] Since the dust removal device of the embodiment of the present application includes the centrifugal fan blade 1, the dust removal device of the embodiment of the present application has the beneficial effects of the centrifugal fan blade 1, which will not be described in detail here. In addition, the dust removal device of the embodiment of the present application is a slender small structure, and the distribution design of the first blade 210 and the second blade 220 in the centrifugal fan blade 1 is more conducive to the reasonable use of space under the smaller cross-section cavity 21, thereby increasing wind force and providing user experience.

[0052] It should be noted that the preferred embodiments of the utility model are given in the specification and drawings of the utility model, but the utility model can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional restrictions on the content of the utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. A centrifugal fan blade for a dust removal device, characterized in that: include: A chassis, used for mounting on the power shaft of the wind pressure motor; as well as A blade module, the blade module comprising a plurality of first blades and a plurality of second blades, the first blades and the second blades being arranged on the chassis, the first blades and the second blades being used to generate air pressure when rotating; Among them, multiple first blades are arranged at intervals around the axial direction of the power shaft, multiple second blades are arranged at intervals around the axial direction of the power shaft, and at least part of the first blades and at least part of the second blades are distributed at intervals, and in the direction perpendicular to the axial direction of the power shaft, the projection length of the first blade is greater than the projection length of the second blade.

2. The centrifugal fan blade for a dust removal device according to claim 1, characterized in that: The number of the first blades and the number of the second blades are the same, and a plurality of the first blades and a plurality of the second blades are arranged in sequence and evenly spaced.

3. The centrifugal fan blade for a dust removal device according to claim 2, characterized in that: The chassis has a fixing surface, the first blade and the second blade are fixed to the fixing surface, and the fixing surface is protruded toward the blade module in the axial direction of the power shaft.

4. The centrifugal fan blade for a dust removal device according to claim 3, characterized in that: The main body of the chassis is a thin-wall structure.

5. The centrifugal fan blade for a dust removal device according to claim 4, characterized in that: The chassis is provided with an assembly column, and the assembly column is provided with an assembly hole, and the assembly hole is used for assembly and fixation with the power shaft.

6. The centrifugal fan blade for a dust removal device according to any one of claims 1 to 5, characterized in that: In the axial direction perpendicular to the power shaft, the first blade and the second blade have a first side located upstream and a second side located downstream, in the axial direction of the power shaft, the distance from the first side to the chassis is greater than the distance from the second side to the chassis, and in the axial direction perpendicular to the power shaft, the distance from the first side to the axis is less than the distance from the second side to the axis.

7. The centrifugal fan blade for a dust removal device according to claim 6, characterized in that: In a direction perpendicular to the axis of the power shaft, a distance from a first side of the first blade to the axis of the power shaft is greater than a distance from a first side of the second blade to the axis of the power shaft.

8. The centrifugal fan blade for a dust removal device according to any one of claims 1 to 5, characterized in that: The first blade and the second blade have a fixed end and a wind-cutting end in the axial direction of the power shaft, the fixed end is fixed to the chassis, and the wind-cutting end is used to receive airflow; Wherein, in the direction perpendicular to the axis of the power shaft, the distance from the wind cutting end to the axis of the power shaft is greater than the distance from the fixed end to the axis of the power shaft.

9. The centrifugal fan blade for a dust removal device according to any one of claims 1 to 5, characterized in that: In a direction perpendicular to the axis of the power shaft, a maximum distance from the blade module to the axis of the power shaft is greater than a maximum distance from the chassis to the axis of the power shaft.

10. A dust removal device, characterized in that: The centrifugal fan blade for dust removal device and a housing, a wind pressure motor and an air guide member as claimed in any one of claims 1 to 9, wherein the housing is provided with a cavity, the cavity has a dust suction port connected to the outside, the centrifugal fan blade for dust removal device, the wind pressure motor and the air guide member are accommodated in the cavity and fixed to the housing, and the chassis is fixed to the power shaft of the wind pressure motor; The air guide member is arranged on the side of the centrifugal fan blade for the dust removal device away from the wind pressure motor, and the air guide member is provided with a first groove and a second groove that are connected on both sides of the axial direction of the power shaft. The first groove is used to concentrate the airflow from a direction perpendicular to the axial direction of the power shaft, so as to guide the airflow to the centrifugal fan blade for the dust removal device, and the second groove is used to form an air passage with the blade module and the chassis.

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