Centrifugal impeller, impeller assembly and purifier

Abstract

The application provides a centrifugal impeller, an impeller assembly and a purifier. The centrifugal impeller comprises a cover, blades and a flow guide ring. The number of the blades is multiple, the multiple blades are arranged along the circumference of the centrifugal impeller and are connected with the cover; the flow guide ring is located on the side of the blades away from the cover and is connected with the blades; wherein the first side edge of the blades on the air outlet side comprises a first edge section, a second edge section and a third edge section, the first edge section is located on the side of the blade close to the flow guide ring, the second edge section is located on the side of the blade close to the cover, the two ends of the third edge section are connected with the first edge section and the second edge section respectively, and the curvature of the third edge section is greater than that of the second edge section. Compared with the mode that each blade is arranged in the axial direction, the arrangement mode of the blades in the application can reduce the resistance of the centrifugal impeller, improve the flow of the centrifugal impeller, and thus improve the working efficiency and air volume of the centrifugal impeller.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a centrifugal impeller, an impeller assembly and a purifier. BACKGROUND

[0002] At present, in the related art, the air purifier as a kind of indoor air purification product can reduce the small particles such as formaldehyde in the house to purify the air, and the centrifugal impeller is arranged in the air purifier, which can guide the air. The centrifugal impeller of the purifier is generally a centrifugal impeller, which includes a plurality of blades arranged circumferentially and each blade arranged axially. However, the blade structure will make the centrifugal impeller have large resistance, thereby reducing the flow of the centrifugal impeller. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art or related art.

[0004] To this end, the first aspect of the present application provides a centrifugal impeller.

[0005] The second aspect of the present application provides an impeller assembly.

[0006] The third aspect of the present application provides a purifier.

[0007] Therefore, the first aspect of the present application provides a centrifugal impeller, which comprises a cover body, a plurality of blades and a flow guide ring. The plurality of blades are arranged circumferentially along the centrifugal impeller and connected with the cover body. The flow guide ring is located on the side of the blade away from the cover body and connected with the blade. The first side edge of the blade on the air outlet side comprises a first edge segment, a second edge segment and a third edge segment. The first edge segment is located on the side of the blade close to the flow guide ring. The second edge segment is located on the side of the blade close to the cover body. The two ends of the third edge segment are connected with the first edge segment and the second edge segment respectively. The curvature of the third edge segment is greater than that of the second edge segment.

[0008] In the technical scheme, the centrifugal impeller comprises a cover body, blades and a flow guide ring. The blades are arranged in the circumferential direction of the centrifugal impeller and connected to the cover body to realize installation and fixation of the blades, so that the blades can suck air when rotating, thereby improving the air purification efficiency. The flow guide ring is located on the side of the blades away from the cover body and connected to the blades to realize installation and fixation of the flow guide ring, so that the flow guide ring can guide the airflow to ensure that the airflow can be purified by the centrifugal impeller. The first side edge of the blade in the circumferential direction of the centrifugal impeller comprises a first edge section, a second edge section and a third edge section to realize arrangement of the blade. The first edge section is located on the side of the blade close to the flow guide ring to realize arrangement of the first edge section; the second edge section is located on the side of the blade close to the cover body to realize arrangement of the second edge section; and the two ends of the third edge section are connected to the first edge section and the second edge section, i.e. the third edge section is located between the first edge section and the second edge section. The curvature of the third edge section is greater than that of the second edge section. By adjusting the curvatures of the second edge section and the third edge section, the diameter of the centrifugal impeller at the second edge section and the diameter of the centrifugal impeller at the third edge section are adjusted. Since the curvature of the third edge section is greater than that of the second edge section, the diameter of the centrifugal impeller at the second edge section is smaller than the diameter of the centrifugal impeller at the third edge section, i.e. the diameter of the centrifugal impeller at the airflow inlet is greater than the diameter of the centrifugal impeller at the airflow outlet. Compared with the mode in which each blade is arranged in the axial direction, the arrangement mode of the blade in the application can reduce the resistance of the centrifugal impeller, improve the flow of the centrifugal impeller, and thus improve the work efficiency and air volume of the centrifugal impeller.

[0009] In addition, the centrifugal impeller in the above technical scheme provided by the application can also have the following additional technical features:

[0010] In some technical schemes of the application, optionally, the blade extends in an arc shape from the air inlet side to the air outlet side.

[0011] In the technical scheme, the blade extends in an arc shape from the air inlet side to the air outlet side, so that the flow through the position of the blade is more smooth, the vortex and resistance generated in the centrifugal impeller are reduced, and thus the purification efficiency is improved.

[0012] In some technical schemes of the application, optionally, the second side edge of the blade at the air inlet side comprises a first flow guide section and a second flow guide section, the first flow guide section is closer to the flow guide ring than the second flow guide section; the first flow guide section extends in an arc shape; the second flow guide section extends linearly and is parallel to the axis of the centrifugal impeller; or the second flow guide section extends linearly and is inclined relative to the axis of the centrifugal impeller; or the second flow guide section extends in an arc shape and the curvature of the second flow guide section is smaller than that of the first flow guide section.

[0013] In the technical scheme, the second side edge of the blade on the air inlet side comprises a first flow guide section and a second flow guide section, the first flow guide section is closer to the guide ring than the second flow guide section, so that the first flow guide section and the second flow guide section are arranged. The first flow guide section extends in an arc shape, which can reduce the vortex and resistance of air at the air inlet, so that the air can enter the centrifugal impeller area more smoothly. The second flow guide section extends in a linear shape and is parallel to the axis of the centrifugal impeller, so that the airflow enters the centrifugal impeller at a certain speed and angle, ensuring the stability of the airflow and improving the purification efficiency. The second flow guide section extends in a linear shape and is inclined relative to the axis of the centrifugal impeller, so that the airflow enters the centrifugal impeller at a certain speed and angle, ensuring the stability of the airflow and improving the purification efficiency. The second flow guide section extends in an arc shape, and the curvature of the second flow guide section is smaller than that of the first flow guide section, so that the airflow enters the centrifugal impeller at a certain speed and angle, ensuring the stability of the airflow and improving the purification efficiency.

[0014] In some technical schemes of the present application, optionally, the blade is arranged to be inclined relative to the axis of the centrifugal impeller from the side close to the guide ring to the side close to the cover body; and / or the side of the blade close to the cover body is closer to the axis of the centrifugal impeller than the side of the blade close to the guide ring.

[0015] In the technical scheme, the blade is arranged to be inclined relative to the axis of the centrifugal impeller from the side close to the guide ring to the side close to the cover body, so that the blade is arranged to be inclined relative to the axis of the centrifugal impeller, which can effectively guide the airflow to the centrifugal impeller, so that the air can enter the centrifugal impeller more smoothly and rotate, and the inclined blade can also generate stronger centrifugal force when rotating to improve the purification efficiency. The side of the blade close to the cover body is closer to the axis of the centrifugal impeller than the side of the blade close to the guide ring, so that the blade is arranged to be inclined, which can reduce the resistance of the centrifugal impeller, improve the flow of the centrifugal impeller, and thus improve the working efficiency and air volume of the centrifugal impeller.

[0016] In some technical schemes of the present application, optionally, the first edge section extends linearly along the axis of the centrifugal impeller; or the first edge section extends from the side close to the guide ring to the side away from the guide ring in a direction away from the axis of the centrifugal impeller.

[0017] In the technical scheme, the first edge section extends linearly along the axis of the centrifugal impeller, or the first edge section extends from the side close to the guide ring to the side away from the guide ring in a direction away from the axis of the centrifugal impeller, so as to arrange the first edge section and increase the contact area of the airflow with the blade, so that the airflow can be discharged from the centrifugal impeller at the position of the first edge section under the action of the centrifugal force. Ensure that the airflow can maintain a stable flow state when entering the centrifugal impeller, and avoid airflow turbulence caused by changes to the first edge section.

[0018] In some embodiments of the present application, optionally, the distance between the second edge section and the axis of the centrifugal impeller is a second distance, and the second distance increases from the side of the second edge section close to the cover to the side away from the cover.

[0019] In this embodiment, the distance between the second edge section and the axis of the centrifugal impeller is a second distance, and the second distance increases from the side of the second edge section close to the cover to the side away from the cover, so as to arrange the second edge section, so that the air flow entering the centrifugal impeller can accelerate the flow rate of the air flow when flowing into the position of the second edge section, ensure that the resistance at the air outlet is reduced, reduce the vortex and backflow of the air flow, and thus improve the air purification effect.

[0020] In some embodiments of the present application, optionally, the second edge section is recessed in the axial direction of the centrifugal impeller towards the direction close to the guide circle.

[0021] In this embodiment, the second edge section is recessed in the axial direction of the centrifugal impeller towards the direction close to the guide circle, so as to optimize the design of the second edge section, which can enhance the suction capacity of the air flow at the position of the second edge section, optimize the flow of the air flow, reduce the turbulence and vortex of the air flow at the position of the second edge section, improve the air purification capacity, increase the air volume of the centrifugal impeller, and also reduce the noise of the purifier during operation.

[0022] In some embodiments of the present application, optionally, the distance between the third edge section and the axis of the centrifugal impeller is a third distance, and the third distance decreases from the side of the third edge section close to the first edge section to the side away from the first edge section; or the third distance increases first and then decreases from the side of the third edge section close to the first edge section to the side away from the first edge section.

[0023] In this embodiment, the distance between the third edge section and the axis of the centrifugal impeller is a third distance, and the third distance decreases from the side of the third edge section close to the first edge section to the side away from the first edge section, so as to arrange the third edge section, which can reduce the vortex at the position of the third edge section by optimizing the shape of the third edge section, reduce the resistance to the air flow, and thus increase the air volume. Or the third distance increases first and then decreases from the side of the third edge section close to the first edge section to the side away from the first edge section, which can reduce the vortex at the position of the third edge section by optimizing the shape of the third edge section, reduce the resistance to the air flow, and thus increase the air volume. Since the cross-sectional area of the centrifugal impeller at the position of the third edge section is reduced, the flow rate of the air flow is increased, the turbulence and vortex of the air in the centrifugal impeller are reduced, the noise generated by the air flow is reduced, and the air purification efficiency is improved.

[0024] Optionally, in some embodiments of the present application, the outer diameter of the flow guide ring is greater than the outer diameter of the cover.

[0025] In this embodiment, since the flow guide ring is located at the inlet of the airflow and the cover is located at the outlet of the airflow, by setting the outer diameter of the flow guide ring to be greater than the outer diameter of the cover, compared with the case where the outer diameter of the cover and the outer diameter of the flow guide ring are the same, the centrifugal impeller can make more airflow enter the centrifugal impeller through the flow guide ring during operation, thereby increasing the air intake of the centrifugal impeller, so that more airflow can be discharged from the centrifugal impeller to increase the air volume of the centrifugal impeller, reduce the resistance of the centrifugal impeller to the airflow at the outlet of the airflow, improve the working efficiency and air volume of the centrifugal impeller, and reduce the noise of the purifier during operation.

[0026] Optionally, in some embodiments of the present application, the ratio of the outer diameter of the cover to the outer diameter of the flow guide ring is greater than or equal to 0.64 and less than or equal to 0.82.

[0027] In this embodiment, the ratio of the outer diameter of the cover to the outer diameter of the flow guide ring is greater than or equal to 0.64 and less than or equal to 0.82 to adjust the ratio of the outer diameter of the cover to the outer diameter of the flow guide ring. By setting the ratio of the outer diameter of the cover to the outer diameter of the flow guide ring to be 0.64 to 0.82, the diameters of the flow guide ring and the cover are optimized, which can increase the air intake during operation of the centrifugal impeller, reduce the impact and friction of the airflow at the inlet of the centrifugal impeller, improve the air intake efficiency, further adjust the flow state of the airflow, reduce the resistance of the centrifugal impeller to the airflow at the outlet of the airflow, improve the working efficiency and air volume of the centrifugal impeller, and reduce the noise of the purifier during operation.

[0028] Optionally, in some embodiments of the present application, the distance between the side of the third edge segment close to the first edge segment and the side of the cover away from the blades is a fourth distance; the distance between the side of the flow guide ring away from the blades and the side of the cover away from the blades is a fifth distance; and the ratio between the fourth distance and the fifth distance is greater than or equal to 0.26 and less than or equal to 0.42.

[0029] In this embodiment, the distance between the side of the third edge segment close to the first edge segment and the side of the cover away from the blades is a fourth distance; the distance between the side of the flow guide ring away from the blades and the side of the cover away from the blades is a fifth distance; and the ratio between the fourth distance and the fifth distance is greater than or equal to 0.26 and less than or equal to 0.42 to optimize and adjust the contour line at the outlet of the airflow of the plurality of blades. By setting the ratio between the fourth distance and the fifth distance to be 0.26 to 0.42, the resistance of the centrifugal impeller to the airflow at the outlet of the airflow can be reduced, the working efficiency and air volume of the centrifugal impeller can be improved, and the noise of the purifier during operation can be reduced.

[0030] In some technical solutions of the present application, the flow guide ring is arranged in a ring shape, and the air flow can enter the area where the blades are located through the inner ring of the flow guide ring.

[0031] In this technical solution, the flow guide ring is arranged in a ring shape, and the air flow can enter the area where the blades are located through the inner ring of the flow guide ring. By setting the flow guide ring in a ring shape, the air flow can be effectively guided to the position of the centrifugal impeller, the resistance of the incoming air is reduced, and the air can more easily enter the centrifugal impeller, thereby improving the air intake efficiency.

[0032] The second aspect of the present application provides a centrifugal impeller assembly, comprising a volute and a centrifugal impeller. The volute has an air inlet and an air outlet; the centrifugal impeller is arranged in the volute, and a first air flow channel is formed between the circumferential outer edge of the centrifugal impeller and the inner wall of the volute; the width of the first air flow channel in the radial direction of the centrifugal impeller is a first width, and the first width increases from the side of the first air flow channel close to the air inlet to the side of the first air flow channel close to the air outlet; the centrifugal impeller comprises a cover body, blades, and a flow guide ring. The number of blades is multiple, and the blades are connected to the cover body; the flow guide ring is located on the side of the blades away from the cover body and is connected to the blades.

[0033] In this technical solution, the centrifugal impeller assembly comprises a volute and a centrifugal impeller. The volute has an air inlet and an air outlet to facilitate the entry and exit of air flow. The centrifugal impeller is arranged in the volute, and a first air flow channel is formed between the circumferential outer edge of the centrifugal impeller and the inner wall of the volute, so that the air flow discharged by the centrifugal impeller can enter the first air flow channel to guide the air flow. The width of the first air flow channel in the radial direction of the centrifugal impeller is a first width, and the first width increases from the side of the first air flow channel close to the air inlet to the side of the first air flow channel close to the air outlet, to achieve the arrangement of the first air flow channel and form a gradually expanding flow passage, which helps to gradually reduce the speed of the air flow during flow and convert the dynamic pressure of the air flow into static pressure, so that the air flow has a higher static pressure when flowing out of the volute. Therefore, the arrangement of the first air flow channel can increase the ability to overcome resistance. The centrifugal impeller comprises a cover body, blades, and a flow guide ring. The number of blades is multiple, and the blades are connected to the cover body; the centrifugal impeller comprises a cover body, blades, and a flow guide ring. The number of blades is multiple, and the blades are connected to the cover body to achieve the installation of multiple blades. The flow guide ring is located on the side of the blades away from the cover body and is connected to the blades to achieve the installation and fixation of the flow guide ring, so that the flow guide ring can guide the air flow to ensure that the air flow can be purified by the centrifugal impeller.

[0034] In addition, the centrifugal impeller assembly in the above technical solution provided by the present application can also have the following additional technical features:

[0035] In some embodiments of the present application, optionally, the second airflow channel is formed between two adjacent blades of the plurality of blades; wherein a width of the second airflow channel on the circumferential direction of the centrifugal impeller at a side close to the air inlet is a second width; a width of the second airflow channel on the circumferential direction of the centrifugal impeller at a side close to the air outlet is a third width; and the second width is less than the third width.

[0036] In this embodiment, the second airflow channel is formed between two adjacent blades of the plurality of blades, so that the airflow can flow through the second airflow channel. The width of the second airflow channel on the circumferential direction of the centrifugal impeller at a side close to the air inlet is a second width; the width of the second airflow channel on the circumferential direction of the centrifugal impeller at a side close to the air outlet is a third width; and the second width is less than the third width, so as to arrange the second airflow channel, so that the width of the second airflow channel at the side close to the air outlet is different from the width of the second airflow channel at the side close to the air inlet, thereby helping to guide the airflow to smoothly enter the impeller. With the increase of the width of the second airflow channel, the process of converting the kinetic energy of the airflow into static pressure energy is more stable, which is beneficial to subsequent purification of the airflow.

[0037] In some embodiments of the present application, optionally, the plurality of blades comprises a first blade and a second blade adjacent to each other; and on a projection surface obtained by projecting the centrifugal impeller along one radial direction of the centrifugal impeller, a side edge of the first blade is located on a pressure surface of the second blade.

[0038] In this embodiment, the plurality of blades comprises a first blade and a second blade adjacent to each other; and on a projection surface obtained by projecting the centrifugal impeller along one radial direction of the centrifugal impeller, a side edge of the first blade is located on a pressure surface of the second blade. The pressure surface is a region with higher pressure on the blade, and the airflow receives a thrust at this position. When the airflow passes between the first blade and the second blade during rotation of the impeller assembly, the airflow will be subjected to a stronger centrifugal effect, thereby improving the purification efficiency.

[0039] In some embodiments of the present application, optionally, in the radial extension direction of the blade, the second blade extends out of the first blade by a first length at a side close to the air inlet; and in the radial extension direction of the blade, the second blade extends out of the first blade by a second length at a side close to the air outlet; and the first length is greater than the second length.

[0040] In the technical solution, in the radial extension direction of the blade, the side of the second blade close to the air inlet extends beyond the length of the first blade by a first length, so as to arrange the first blade and the second blade on the side close to the air inlet. In the radial extension direction of the blade, the side of the second blade close to the air outlet extends beyond the length of the first blade by a second length, so as to arrange the first blade and the second blade on the side close to the air outlet. By setting the first length to be greater than the second length, the second blade can be in contact with the airflow earlier on the side of the air inlet and guide the airflow into the centrifugal impeller, and the second length is shorter on the side of the air outlet, so as to reduce the obstruction of the blade to the airflow, thereby improving the flow efficiency and stability of the airflow.

[0041] In some technical solutions of the present application, optionally, the first side edge of the blade on the air outlet side comprises a first edge section and a second edge section. The second edge section is closer to the air outlet than the first edge section; wherein the blade extends in a first direction, and the second edge section extends in a direction opposite to the first direction from the side close to the first edge section to the side away from the first edge section.

[0042] In the technical solution, the first side edge of the blade on the air outlet side comprises a first edge section and a second edge section. The second edge section is closer to the air outlet than the first edge section, so as to arrange the first edge section and the second edge section. The blade extends in a first direction, and the second edge section extends in a direction opposite to the first direction from the side close to the first edge section to the side away from the first edge section, that is, the first edge section and the second edge section extend in different directions, so as to form a gradually expanding outlet on the air outlet side of the blade, so as to improve the air outlet volume, and by optimizing the shape of the edge on the air outlet side of the blade, the contact between the airflow and the blade on the air outlet side is reduced, and the vortex and turbulence generated by the airflow on the air outlet side of the blade are reduced.

[0043] In some technical solutions of the present application, optionally, the ratio of the outer diameter of the cover to the outer diameter of the flow guide ring is greater than or equal to 0.64 and less than or equal to 0.82; and / or the first side edge of the blade on the air outlet side further comprises a third edge section, the two ends of the third edge section are connected with the first edge section and the second edge section respectively; the distance between the side of the third edge section close to the first edge section and the side of the cover away from the blade is a fourth distance L; the distance between the side of the flow guide ring away from the blade and the side of the cover away from the blade is a fifth distance M; the ratio between the fourth distance L and the fifth distance M is greater than or equal to 0.26 and less than or equal to 0.42.

[0044] In the technical scheme, the ratio of the outer diameter of the cover body to the outer diameter of the flow guide ring is greater than or equal to 0.64 and less than or equal to 0.82, so as to adjust the ratio of the outer diameter of the cover body to the outer diameter of the flow guide ring. By setting the ratio of the outer diameter of the cover body to the outer diameter of the flow guide ring to 0.64 to 0.82, the diameters of the flow guide ring and the cover body are optimized. Through tests, when the ratio of the outer diameter of the cover body to the outer diameter of the flow guide ring is 0.64, the proportion of the wind volume increase is 3.5%; when the ratio of the outer diameter of the cover body to the outer diameter of the flow guide ring is 0.68, the proportion of the wind volume increase is 4.3%; when the ratio of the outer diameter of the cover body to the outer diameter of the flow guide ring is 0.73, the proportion of the wind volume increase is 5.2%; when the ratio of the outer diameter of the cover body to the outer diameter of the flow guide ring is 0.78, the proportion of the wind volume increase is 4.7%; and when the ratio of the outer diameter of the cover body to the outer diameter of the flow guide ring is 0.82, the proportion of the wind volume increase is 3.6%. Therefore, when the centrifugal impeller is working, the air intake can be increased by optimizing the diameters of the flow guide ring and the cover body, the impact and friction of the air flow at the inlet of the centrifugal impeller are reduced, the air intake efficiency is improved, the flow state of the air flow is further adjusted, the resistance of the centrifugal impeller to the air flow at the outlet of the air flow is reduced, the working efficiency and the wind volume of the centrifugal impeller are improved, and the noise of the purifier during operation is reduced. The two ends of the third edge section are connected with the first edge section and the second edge section respectively, that is, the third edge section is located between the first edge section and the second edge section. The distance between the side of the third edge section close to the first edge section and the side of the cover body away from the blades is a fourth distance L; the distance between the side of the flow guide ring away from the blades and the side of the cover body away from the blades is a fifth distance M, and the ratio between the fourth distance L and the fifth distance M is greater than or equal to 0.26 and less than or equal to 0.42, so as to optimize and adjust the contour line at the air outlet of the plurality of blades. Through tests, when the ratio between the fourth distance L and the fifth distance M is 0.26, the proportion of the wind volume increase is 6.1%; when the ratio between the fourth distance L and the fifth distance M is 0.31, the proportion of the wind volume increase is 8.3%; when the ratio between the fourth distance L and the fifth distance M is 0.35, the proportion of the wind volume increase is 10.2%; when the ratio between the fourth distance L and the fifth distance M is 0.40, the proportion of the wind volume increase is 7.2%; and when the ratio between the fourth distance L and the fifth distance M is 0.42, the proportion of the wind volume increase is 5.7%. Therefore, by adjusting the ratio between the fourth distance L and the fifth distance M, the resistance of the centrifugal impeller to the air flow at the outlet of the air flow can be reduced, the working efficiency and the wind volume of the centrifugal impeller are improved, and the noise of the purifier during operation is reduced.

[0045] In some technical schemes of the present application, the second edge section is concave towards the direction close to the flow guide ring.

[0046] In the technical scheme, the second edge section is recessed towards the direction close to the guide ring, so that the second edge section is optimized, the air suction capacity at the position of the second edge section is enhanced, the air flow is optimized, the turbulence and vortex of the air flow at the second edge section are reduced, the air purification capacity is improved, the air volume of the centrifugal impeller is improved, and the noise of the purifier during working is reduced.

[0047] In some technical schemes of the present application, optionally, the first edge section extends along the axial direction of the centrifugal impeller, or the first edge section extends from the side close to the guide ring to the side away from the guide ring in the direction away from the axis of the centrifugal impeller.

[0048] In the technical scheme, the first edge section extends along the axial direction of the centrifugal impeller, or the first edge section extends from the side close to the guide ring to the side away from the guide ring in the direction away from the axis of the centrifugal impeller, so that the first edge section is arranged, and the stable flow state of the air flow when entering the centrifugal impeller is ensured, and the air flow is prevented from being disturbed due to the change of the first edge section.

[0049] In some technical schemes of the present application, optionally, the second side edge of the blade at the air inlet side comprises a first flow guide section and a second flow guide section, the first flow guide section is closer to the guide ring than the second flow guide section, in the radial direction of the centrifugal impeller, the second flow guide section is arranged opposite to the second edge section, the first flow guide section extends in an arc shape, the second flow guide section extends linearly and is parallel to the axis of the centrifugal impeller, or the second flow guide section extends linearly and is inclined relative to the axis of the centrifugal impeller, or the second flow guide section extends in an arc shape, and the curvature of the second flow guide section is smaller than the curvature of the first flow guide section.

[0050] In the technical scheme, the second side edge of the blade on the air inlet side comprises a first flow guide section and a second flow guide section, the first flow guide section is closer to the guide ring than the second flow guide section, so that the first flow guide section and the second flow guide section are arranged. In the radial direction of the centrifugal impeller, the second flow guide section is arranged opposite to the second edge section, that is, the second edge section on the air outlet side of the blade is at the same height as the second flow guide section, which can guide the air flow to smoothly enter the centrifugal impeller on the air inlet side and be discharged on the air outlet side, reduce the turbulence and vortex of the air flow between the blades, and improve the flow efficiency of the air flow by optimizing the flow path of the air flow. The first flow guide section extends in an arc shape, which can reduce the vortex and resistance of air at the air inlet, so that the air can more smoothly enter the centrifugal impeller area. The second flow guide section extends linearly and is parallel to the axis of the centrifugal impeller, so that the air flow enters the centrifugal impeller at a certain speed and angle, ensuring the stability of the air flow and improving the purification efficiency. The second flow guide section extends linearly and is inclined relative to the axis of the centrifugal impeller, so that the air flow enters the centrifugal impeller at a certain speed and angle, ensuring the stability of the air flow and improving the purification efficiency. The second flow guide section extends in an arc shape, and the curvature of the second flow guide section is smaller than that of the first flow guide section, so that the air flow enters the centrifugal impeller at a certain speed and angle, ensuring the stability of the air flow and improving the purification efficiency.

[0051] In some technical schemes of the present application, optionally, the connection between the air inlet side of the plurality of blades and the cover body is located on the same circle.

[0052] In the technical scheme, the connection between the air inlet side of the plurality of blades and the cover body is located on the same circle, so that the plurality of blades can be installed and uniformly distributed between the plurality of blades, reducing the non-uniformity of the air flow on the air inlet side.

[0053] In some technical schemes of the present application, optionally, the volute comprises a first shell and a second shell. The second shell is closer to the air inlet than the first shell; wherein the width of the first shell is greater than the width of the second shell; or the inner diameter of the first shell is greater than the inner diameter of the second shell.

[0054] In the technical scheme, the volute comprises a first shell and a second shell. The second shell is closer to the air inlet than the first shell, so that the first shell and the second shell are arranged. The width of the first shell is greater than the width of the second shell, or the inner diameter of the first shell is greater than the inner diameter of the second shell, so as to facilitate the installation of the centrifugal impeller in the second shell, so that a first air flow channel is formed between the circumferential outer edge of the centrifugal impeller and the inner wall of the second shell.

[0055] The third aspect of the present application provides a purifier comprising the centrifugal impeller or the impeller assembly of any of the above technical schemes. Therefore, the purifier has all the beneficial effects of the centrifugal impeller or the impeller assembly.

[0056] Optionally, in some technical solutions of the present invention, the purifier further includes a housing, a filter element, and an air outlet grille. The housing includes an air inlet grille; the filter element is disposed within the air inlet grille and has an air inlet channel; a centrifugal impeller is disposed within the housing, opposite to the air inlet channel; and the air outlet grille is connected to the housing and located on the side of the centrifugal impeller away from the air inlet channel.

[0057] In this technical solution, the purifier also includes a housing, a filter element, and an exhaust grille. The housing includes an intake grille; the filter element is disposed within the intake grille and has an intake channel for installation and fixation, allowing outside air to enter the filter element for filtration through the intake grille. A centrifugal impeller is disposed within the housing, opposite the intake channel, for installation. The exhaust grille is connected to the housing and located on the side of the centrifugal impeller away from the intake channel, for installation and fixation, allowing purified air to be discharged to the outside through the exhaust grille, thus achieving the discharge of purified air.

[0058] In some technical solutions of the present invention, the purifier may optionally further include a bracket and a drive component. The bracket has an air outlet channel; the mounting end of the drive component is connected to the bracket, and the driving end of the drive component is connected to the centrifugal impeller, enabling it to drive the centrifugal impeller to rotate.

[0059] In this technical solution, the purifier also includes a bracket and a drive component. The bracket has an air outlet channel for installation and fixation, allowing purified air to be discharged through the outlet channel. The mounting end of the drive component is connected to the bracket, and the driving end of the drive component is connected to the centrifugal impeller, enabling the centrifugal impeller to rotate. This allows for the installation and fixation of the drive component, and provides driving force for the rotation of the centrifugal impeller. After the centrifugal impeller rotates, a high negative pressure area can be formed nearby, creating a pressure difference between the air intake grille and the centrifugal impeller, thereby drawing in air for purification.

[0060] In some technical solutions of the present invention, the purifier may optionally include guide vanes, wherein there are multiple guide vanes, which are located in the air outlet channel and connected to the bracket.

[0061] In this technical solution, the purifier also includes guide vanes, which are multiple in number and located in the air outlet channel. They are connected to the bracket to install and fix the multiple guide vanes. By setting multiple guide vanes in the air outlet channel, the guide vanes can purify the air discharged from the centrifugal impeller, ensuring that the purified air can flow out in an orderly and smooth manner, reducing the turbulence and resistance of the airflow in the air outlet channel, and improving the overall efficiency of the air purifier.

[0062] Optionally, the purifier further comprises a flow collector and a mesh cover.

[0063] In the technical scheme, the purifier further comprises a flow collector and a mesh cover. The flow collector is located at the side of the centrifugal impeller close to the air inlet channel, so as to realize installation and fixation of the flow collector, so that the flow collector can guide and evenly introduce the air entering into the air inlet channel into the fan, so as to reduce the non-uniformity of the air flow, reduce the flow loss of the air flow, and improve the purification efficiency of the air purifier. The mesh cover is arranged on the flow collector, so as to realize installation and fixation of the mesh cover, so that the mesh cover can filter the impurities in the air, avoid damage to the fan, and prolong the service life of the air purifier.

[0064] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0065] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings.

[0066] Figure 1 One of the structural schematic diagrams of a centrifugal impeller according to one embodiment of the present application is shown;

[0067] Figure 2 One of the structural schematic diagrams of a centrifugal impeller according to one embodiment of the present application is shown;

[0068] Figure 3 One of the structural schematic diagrams of a centrifugal impeller according to one embodiment of the present application is shown;

[0069] Figure 4 One of the structural schematic diagrams of a centrifugal impeller according to one embodiment of the present application is shown;

[0070] Figure 5 One of the structural schematic diagrams of a centrifugal impeller according to one embodiment of the present application is shown;

[0071] Figure 6 One of the structural schematic diagrams of a centrifugal impeller according to one embodiment of the present application is shown;

[0072] Figure 7 One of the structural schematic diagrams of a centrifugal impeller according to one embodiment of the present application is shown;

[0073] Figure 8A velocity contour showing a centrifugal impeller with the same diameter at the gas flow inlet as at the gas flow outlet according to one embodiment of the present application;

[0074] Figure 9 A velocity contour showing a centrifugal impeller with a third edge segment having a curvature greater than a curvature of a second edge segment according to one embodiment of the present application;

[0075] Figure 10 A turbulent kinetic energy contour showing a centrifugal impeller with the same diameter at the gas flow inlet as at the gas flow outlet according to one embodiment of the present application;

[0076] Figure 11 A turbulent kinetic energy contour showing a centrifugal impeller with a third edge segment having a curvature greater than a curvature of a second edge segment according to one embodiment of the present application;

[0077] Figure 12 A velocity contour showing a centrifugal impeller according to one embodiment of the present application;

[0078] Figure 13 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application;

[0079] Figure 14 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application;

[0080] Figure 15 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application;

[0081] Figure 16 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application;

[0082] Figure 17 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application; Figure 16 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application;

[0083] Figure 18 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application;

[0084] Figure 19 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application;

[0085] Figure 20 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application;

[0086] Figure 21 A structural schematic diagram of a part of a centrifugal impeller according to one embodiment of the present application.

[0087] wherein,Figures 1 to 21 The correspondence between the reference signs in the drawings and the component names is as follows:

[0088] 100 centrifugal impeller, 110 cover, 120 blade, 122 first edge section, 124 second edge section, 126 third edge section, 128 first side edge, 130 flow guide ring, 132 second side edge, 134 first flow guide section, 136 second flow guide section, 138 first air flow channel, 140 air inlet, 142 air outlet, 144 first shell, 146 second shell, 148 first blade, 150 second blade, 152 impeller assembly, 154 second air flow channel, 200 purifier, 202 air inlet grille, 204 filter component, 206 air inlet channel, 208 shell, 210 volute, 212 air outlet grille, 214 support, 216 driving component, 218 guide vane, 220 air outlet channel, 222 flow collector, 224 mesh cover, 226 inner wall. DETAILED DESCRIPTION

[0089] In order to enable persons skilled in the art to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0090] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, and therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0091] The following refers to Figures 1 to 21 The centrifugal impeller 100, the impeller assembly and the purifier 200 according to some embodiments of the present application are described.

[0092] As Figure 1 and Figure 2 shown, Figure 1 one of the structural schematic diagrams of the centrifugal impeller 100 according to an embodiment of the present application is shown; Figure 2 one of the structural schematic diagrams of the centrifugal impeller 100 according to an embodiment of the present application is shown; an embodiment of the present application provides a centrifugal impeller 100, which includes a cover 110, a blade 120 and a flow guide ring 130. As Figure 2 and Figure 3 shown, the number of the blades 120 is multiple, the multiple blades 120 are arranged along the circumference of the centrifugal impeller 100, and are connected with the cover 110; the flow guide ring 130 is located on the side of the blade 120 away from the cover 110, and is connected with the blade 120; as Figure 2 and Figure 3 shown, Figure 3Fig. 3 shows a structural schematic view of a centrifugal impeller according to one embodiment of the present application, wherein the first side edge 128 of the blade 120 on the air outlet side comprises a first edge section 122, a second edge section 124 and a third edge section 126, the first edge section 122 is located on the side of the blade 120 close to the guide ring 130, the second edge section 124 is located on the side of the blade 120 close to the cover 110, and the two ends of the third edge section 126 are connected with the first edge section 122 and the second edge section 124 respectively, and the curvature of the third edge section 126 is greater than that of the second edge section 124.

[0093] In this embodiment, the centrifugal impeller 100 comprises a cover 110, blades 120 and a guide ring 130. The blades 120 are multiple in number and arranged along the circumference of the centrifugal impeller 100, and connected with the cover 110 to achieve installation and fixation of the blades 120, so that the blades 120 can suck air when rotating, thereby improving the efficiency of air purification. The guide ring 130 is located on the side of the blades 120 away from the cover 110 and connected with the blades 120 to achieve installation and fixation of the guide ring 130, so that the guide ring 130 can guide the airflow to ensure that the airflow can be purified by the centrifugal impeller 100. The first side edge 128 of the blade 120 on the air outlet side comprises a first edge section 122, a second edge section 124 and a third edge section 126 to achieve the arrangement of the blade 120. The first edge section 122 is located on the side of the blade 120 close to the guide ring 130 to achieve the arrangement of the first edge section 122; the second edge section 124 is located on the side of the blade 120 close to the cover 110 to achieve the arrangement of the second edge section 124; and the two ends of the third edge section 126 are connected with the first edge section 122 and the second edge section 124 respectively, i.e. the third edge section 126 is located between the first edge section 122 and the second edge section 124. The curvature of the third edge section 126 is greater than that of the second edge section 124, and by adjusting the curvatures of the second edge section 124 and the third edge section 126, the diameter of the centrifugal impeller 100 at the second edge section 124 and the diameter of the centrifugal impeller 100 at the third edge section 126 are adjusted. Since the curvature of the third edge section 126 is greater than that of the second edge section 124, the diameter of the centrifugal impeller 100 at the second edge section 124 is smaller than the diameter of the centrifugal impeller 100 at the third edge section 126, i.e. the diameter of the centrifugal impeller 100 at the airflow inlet is greater than the diameter of the centrifugal impeller 100 at the airflow outlet. Compared with the way that each blade 120 is arranged along the axial direction, the arrangement of the blades 120 in the present application can reduce the resistance of the centrifugal impeller 100, improve the flow rate of the centrifugal impeller 100, and thus improve the working efficiency and air volume of the centrifugal impeller 100.

[0094] Specifically, this application adjusts the curvature of the second edge segment 124 and the third edge segment 126 by setting the curvature of the third edge segment 126 to be greater than that of the second edge segment 124. This not only significantly increases the air volume of the purifier 200, but also reduces its noise and power, solving the problems of low air volume and high noise in the purifier 200. By adjusting the blades 120 at the air outlet of the centrifugal impeller 100, the air outlet resistance of the centrifugal impeller 100 is reduced, and the working efficiency and air volume of the centrifugal impeller 100 are improved.

[0095] Specifically, in Figure 1 In the diagram, arrow E indicates the circumferential direction of the centrifugal impeller 100.

[0096] Specifically, in Figure 2 In the diagram, arrow O indicates the axial direction of the centrifugal impeller, and arrow N indicates the radial direction of the centrifugal impeller 100. The radial direction of the centrifugal impeller 100 is the same as the radial direction of the blade 120.

[0097] This embodiment provides a centrifugal impeller 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0098] The blade 120 extends in an arc shape from the air inlet side to the air outlet side.

[0099] In this embodiment, the blade 120 extends in an arc shape from the air inlet side to the air outlet side, making the airflow at the position of the blade 120 smoother, reducing the eddies and resistance generated inside the centrifugal impeller 100, thereby improving the purification efficiency.

[0100] This embodiment provides a centrifugal impeller 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0101] like Figure 4 and Figure 5 As shown, Figure 4 A schematic diagram of the second side edge 132 according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of a blade 120 according to an embodiment of the present invention is shown; the blade 120 includes a first guide section 134 and a second guide section 136 on the second side edge 132 of the air inlet side, the first guide section 134 being closer to the guide ring 130 than the second guide section 136; the first guide section 134 extends in an arc shape; the second guide section 136 extends linearly and is parallel to the axis of the centrifugal impeller 100; or the second guide section 136 extends linearly and is inclined relative to the axis of the centrifugal impeller 100; or the second guide section 136 extends in an arc shape and the arc of the second guide section 136 is smaller than the arc of the first guide section 134.

[0102] In this embodiment, the second side edge 132 of the blade 120 at the air inlet side comprises a first guide section 134 and a second guide section 136, the first guide section 134 is closer to the guide ring 130 than the second guide section 136, so as to achieve the arrangement of the first guide section 134 and the second guide section 136. The first guide section 134 extends in an arc shape, which can reduce the vortex and resistance of the air at the air inlet, so that the air can enter the centrifugal impeller 100 area more smoothly. The second guide section 136 extends in a linear shape and is parallel to the axis of the centrifugal impeller 100, so that the airflow enters the centrifugal impeller 100 at a certain speed and angle, ensuring the stability of the airflow, thereby improving the purification efficiency. The second guide section 136 extends in a linear shape and is inclined relative to the axis of the centrifugal impeller 100, so that the airflow enters the centrifugal impeller 100 at a certain speed and angle, ensuring the stability of the airflow, thereby improving the purification efficiency. The second guide section 136 extends in an arc shape, and the curvature of the second guide section 136 is smaller than that of the first guide section 134, so that the airflow enters the centrifugal impeller 100 at a certain speed and angle, ensuring the stability of the airflow, thereby improving the purification efficiency.

[0103] Specifically, the second guide section 136 extends in a linear shape and is parallel to the axis of the centrifugal impeller 100.

[0104] Specifically, the second guide section 136 extends in a linear shape and is inclined relative to the axis of the centrifugal impeller 100.

[0105] Specifically, the second guide section 136 extends in an arc shape, and the curvature of the second guide section 136 is smaller than that of the first guide section 134.

[0106] The embodiment provides a centrifugal impeller 100, in addition to the technical features of the above-mentioned embodiments, the embodiment further comprises the following technical features.

[0107] The blade 120 is arranged to be inclined relative to the axis of the centrifugal impeller 100 from the side close to the guide ring 130 to the side close to the cover body 110; and / or the side close to the cover body 110 of the blade 120 is closer to the axis of the centrifugal impeller 100 than the side close to the guide ring 130 of the blade 120.

[0108] In this embodiment, the vane 120 is arranged to be inclined relative to the axis of the centrifugal impeller 100 from the side close to the flow guide ring 130 to the side close to the cover body 110, so that the vane 120 arranged to be inclined relative to the axis of the centrifugal impeller 100 can effectively guide the airflow to flow to the centrifugal impeller 100, so that the air can more smoothly enter the centrifugal impeller 100 to rotate, and the inclined vane 120 can also generate stronger centrifugal force when rotating to improve the purification efficiency. The side of the vane 120 close to the cover body 110 is closer to the axis of the centrifugal impeller 100 than the side of the vane 120 close to the flow guide ring 130, so that the vane 120 is arranged to be inclined, which can reduce the resistance of the centrifugal impeller 100, improve the flow of the centrifugal impeller 100, and thus improve the working efficiency and air volume of the centrifugal impeller 100.

[0109] Specifically, the vane 120 is arranged to be inclined relative to the axis of the centrifugal impeller 100 from the side close to the flow guide ring 130 to the side close to the cover body 110.

[0110] Specifically, the side of the vane 120 close to the cover body 110 is closer to the axis of the centrifugal impeller 100 than the side of the vane 120 close to the flow guide ring 130.

[0111] Specifically, the vane 120 is arranged to be inclined relative to the axis of the centrifugal impeller 100 from the side close to the flow guide ring 130 to the side close to the cover body 110; and the side of the vane 120 close to the cover body 110 is closer to the axis of the centrifugal impeller 100 than the side of the vane 120 close to the flow guide ring 130.

[0112] The embodiment provides a centrifugal impeller 100, in addition to the technical features of the above-mentioned embodiments, the embodiment further includes the following technical features.

[0113] As shown in Figure 2 the first edge section 122 extends linearly along the axial direction of the centrifugal impeller; or the first edge section 122 extends from the side close to the flow guide ring 130 to the side away from the flow guide ring 130 in a direction away from the axis of the centrifugal impeller 100.

[0114] In this embodiment, the first edge section 122 extends linearly along the axial direction of the centrifugal impeller 100, or the first edge section 122 extends from the side close to the flow guide ring 130 to the side away from the flow guide ring 130 in a direction away from the axis of the centrifugal impeller 100, so as to realize the arrangement of the first edge section 122, increase the contact area of the airflow with the vane 120, and facilitate the airflow to be discharged from the centrifugal impeller 100 at the position of the first edge section 122 under the action of the centrifugal force. Ensure that the airflow can maintain a stable flow state when entering the centrifugal impeller 100, and avoid airflow turbulence caused by changes to the first edge section 122.

[0115] Specifically, inFigure 2 In the figure, the dashed line D represents the axis of the centrifugal impeller 100.

[0116] Specifically, as shown in Figure 18 and Figure 19 , the first edge section 122 is linearly extended along the axial direction of the centrifugal impeller 100, that is, on the projection plane formed by the axial projection of the centrifugal impeller 100, the blade 120 is arcuately extended, and the connecting point of the first edge section 122 and the shroud 130 and the end point away from the shroud 130 coincide at point a. Figure 18 Figure 19 Specifically, as shown in and

[0117] , the first edge section 122 is linearly extended along the axial direction of the centrifugal impeller 100, that is, on the projection plane formed by the axial projection of the centrifugal impeller 100, the blade 120 is arcuately extended, and the connecting point of the first edge section 122 and the shroud 130 and the end point away from the shroud 130 coincide at point a. Figure 20 Figure 21 Specifically, as shown in Figure 20 and Figure 21 , the first edge section 122 is linearly extended along the axial direction of the centrifugal impeller 100, that is, on the projection plane formed by the axial projection of the centrifugal impeller 100, the blade 120 is arcuately extended, and the connecting point of the first edge section 122 and the shroud 130 and the end point away from the shroud 130 coincide at point a.

[0118] The embodiment provides a centrifugal impeller 100, in addition to the technical features of the above-mentioned embodiment, the embodiment further comprises the following technical features.

[0119] As shown in Figure 2 and Figure 3 , the distance between the second edge section 124 and the axis of the centrifugal impeller 100 is a second distance J, and the second distance J increases from the side of the second edge section 124 close to the cover 110 to the side away from the cover 110.

[0120] In this embodiment, the distance between the second edge section 124 and the axis of the centrifugal impeller 100 is a second distance J, and the second distance J increases from the side of the second edge section 124 close to the cover 110 to the side away from the cover 110, so as to arrange the second edge section 124, so that the airflow entering the centrifugal impeller 100 can accelerate the flow speed of the airflow when flowing into the position of the second edge section 124, ensure that the resistance at the outlet of the airflow is reduced, reduce the vortex and backflow of the airflow, and thus improve the air purification effect.

[0121] ​Specifically, the centrifugal impeller 100 is projected along the axial direction of the centrifugal impeller 100 to form a radial projection plane of the centrifugal impeller 100, and the second distance J can be obtained by measuring the distance between the second edge section 124 and the axis of the centrifugal impeller 100.

[0122] The embodiment provides a centrifugal impeller 100, in addition to the technical features of the above-mentioned embodiments, and further comprises the following technical features.

[0123] As shown in Figure 1 and Figure 2 , in the axial direction of the centrifugal impeller 100, the second edge section 124 is recessed towards the direction close to the guide circle 130.

[0124] In this embodiment, in the axial direction of the centrifugal impeller 100, the second edge section 124 is recessed towards the direction close to the guide circle 130, so that the second edge section 124 is optimized, the air suction capacity of the second edge section 124 is enhanced, the air flow is optimized, the turbulence and vortex of the air flow at the second edge section 124 are reduced, the air purification capacity is improved, the air volume of the centrifugal impeller 100 is improved, and the noise of the purifier 200 during work is reduced.

[0125] The embodiment provides a centrifugal impeller 100, in addition to the technical features of the above-mentioned embodiments, and further comprises the following technical features.

[0126] As shown in Figure 2 and Figure 3 , the distance between the third edge section 126 and the axis of the centrifugal impeller 100 is the third distance K, the third distance K decreases from the side of the third edge section 126 close to the first edge section 122 to the side away from the first edge section 122; or the third distance increases first and then decreases from the side of the third edge section 126 close to the first edge section 122 to the side away from the first edge section 122.

[0127] In this embodiment, the distance between the third edge section 126 and the axis of the centrifugal impeller 100 is a third distance K, which decreases from the side of the third edge section 126 close to the first edge section 122 to the side away from the first edge section 122, so as to achieve the arrangement of the third edge section 126, and by optimizing the shape of the third edge section 126, the vortex generated at the position of the third edge section 126 can be reduced, the resistance to the airflow is reduced, and thus the air output is improved. The third edge section 126 or the third distance increases first and then decreases from the side of the third edge section 126 close to the first edge section 122 to the side away from the first edge section 122, and by optimizing the shape of the third edge section 126, the vortex generated at the position of the third edge section 126 can be reduced, the resistance to the airflow is reduced, and thus the air output is improved. Since the cross-sectional area of the centrifugal impeller 100 at the position of the third edge section 126 is reduced, the flow rate of the airflow is increased, the turbulence and vortex of the air inside the centrifugal impeller 100 are reduced, the noise generated by the airflow is reduced, and the purification efficiency of the air is improved.

[0128] Specifically, the projection of the centrifugal impeller 100 along the axis direction of the centrifugal impeller 100 can form a radial projection plane of the centrifugal impeller 100, and the third distance K can be obtained by measuring the distance between the third edge section 126 and the axis of the centrifugal impeller 100.

[0129] Specifically, the third distance K decreases from the side of the third edge section 126 close to the first edge section 122 to the side away from the first edge section 122.

[0130] Specifically, the third distance increases first and then decreases from the side of the third edge section close to the first edge section to the side away from the first edge section.

[0131] The centrifugal impeller 100 provided in this embodiment further includes the following technical features in addition to the technical features of the above-mentioned embodiments.

[0132] As shown in Figure 1 and Figure 2 , the outer diameter of the flow guide ring 130 is greater than the outer diameter of the cover 110.

[0133] In this embodiment, since the flow guide ring 130 is located at the inlet of the air flow and the cover 110 is located at the outlet of the air flow, by setting the outer diameter of the flow guide ring 130 to be larger than the outer diameter of the cover 110, compared with the case that the outer diameter of the cover 110 and the outer diameter of the flow guide ring 130 are the same, the centrifugal impeller 100 of the present application can make more air flow enter the centrifugal impeller 100 through the flow guide ring 130 during operation, thereby increasing the air intake of the centrifugal impeller 100, so that more air flow can be discharged from the centrifugal impeller 100 to increase the air output of the centrifugal impeller 100, reduce the resistance of the centrifugal impeller 100 to the air flow at the outlet of the air flow, improve the working efficiency and air volume of the centrifugal impeller 100, and reduce the noise of the purifier 200 during operation.

[0134] Specifically, projecting the centrifugal impeller 100 along the radial direction of the centrifugal impeller 100 can form an axial projection surface of the centrifugal impeller 100. The outer diameter of the flow guide ring 130 is the distance between one end and the other end of the flow guide ring 130 along the direction perpendicular to the axis of the centrifugal impeller 100. The outer diameter of the cover 110 is the distance between one end and the other end of the cover 110 along the direction perpendicular to the axis of the centrifugal impeller 100.

[0135] Specifically, in Figure 2 , arrow B represents the outer diameter of the flow guide ring 130, and arrow C represents the outer diameter of the cover 110.

[0136] The centrifugal impeller 100 of the present embodiment further includes the following technical features in addition to the technical features of the above-mentioned embodiments.

[0137] The ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is greater than or equal to 0.64 and less than or equal to 0.82.

[0138] In this embodiment, the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is greater than or equal to 0.64 and less than or equal to 0.82, so as to adjust the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130. By setting the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 to 0.64 to 0.82, the diameters of the flow guide ring 130 and the cover 110 are optimized. As shown in Table 1, through testing, when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.64, the proportion of wind volume increase is 3.5%; when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.68, the proportion of wind volume increase is 4.3%; when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.73, the proportion of wind volume increase is 5.2%; when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.78, the proportion of wind volume increase is 4.7%; and when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.82, the proportion of wind volume increase is 3.6%. Therefore, during the operation of the centrifugal impeller 100, by optimizing the diameters of the flow guide ring 130 and the cover 110, the air intake can be increased, the impact and friction of the air flow at the inlet of the centrifugal impeller 100 are reduced, the air intake efficiency is improved, the flow state of the air flow is further adjusted, the resistance of the centrifugal impeller 100 to the air flow at the outlet of the centrifugal impeller 100 is reduced, the working efficiency and the wind volume of the centrifugal impeller 100 are improved, and the noise of the purifier 200 during operation is reduced.

[0139] Table 1

[0140]

[0141] Specifically, the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is equal to 0.64, and the proportion of wind volume increase of the centrifugal impeller 100 is 3.5%.

[0142] Specifically, the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is equal to 0.82, and the proportion of wind volume increase of the centrifugal impeller 100 is 3.6%.

[0143] Specifically, the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is equal to 0.68, and the proportion of wind volume increase of the centrifugal impeller 100 is 4.3%.

[0144] Specifically, the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is equal to 0.73, and the proportion of wind volume increase of the centrifugal impeller 100 is 5.2%.

[0145] Specifically, the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is equal to 0.78, and the proportion of wind volume increase of the centrifugal impeller 100 is 4.7%.

[0146] Specifically, the outer diameter of the cover 110 is the diameter of the centrifugal impeller 100 at the airflow outlet, and the outer diameter of the guide ring 130 is the diameter of the centrifugal impeller 100 at the airflow inlet.

[0147] This embodiment provides a centrifugal impeller 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0148] like Figure 2 As shown, the distance between the side of the third edge segment 126 closest to the first edge segment 122 and the side of the cover 110 furthest from the blade 120 is the fourth distance L; the distance between the side of the guide ring 130 furthest from the blade 120 and the side of the cover 110 furthest from the blade 120 is the fifth distance M; the ratio between the fourth distance L and the fifth distance M is greater than or equal to 0.26 and less than or equal to 0.42.

[0149] In this embodiment, the distance between the side of the third edge segment 126 close to the first edge segment 122 and the side of the cover 110 away from the blade 120 is the fourth distance L; the distance between the side of the guide ring 130 away from the blade 120 and the side of the cover 110 away from the blade 120 is the fifth distance M. The ratio between the fourth distance L and the fifth distance M is greater than or equal to 0.26 and less than or equal to 0.42, so as to optimize and adjust the contour line at the airflow outlet of the multiple blades 120. As shown in Table 2, through testing, the air volume increased by 6.1% when the ratio of the fourth distance L to the fifth distance M was 0.26; by 8.3% when the ratio was 0.31; by 10.2% when the ratio was 0.35; by 7.2% when the ratio was 0.40; and by 5.7% when the ratio was 0.42. Therefore, by adjusting the ratio of the fourth distance L to the fifth distance M, the resistance of the centrifugal impeller 100 to the airflow at the airflow outlet can be reduced, thereby improving the working efficiency and airflow of the centrifugal impeller 100 and reducing the noise of the purifier 200 during operation.

[0150] Table 2

[0151]

[0152] Specifically, the ratio between the fourth distance L and the fifth distance M is 0.26, and the air volume of the centrifugal impeller 100 is increased by 6.1%.

[0153] Specifically, the ratio between the fourth distance L and the fifth distance M is 0.31, and the air volume of the centrifugal impeller 100 is increased by 8.3%.

[0154] Specifically, the ratio between the fourth distance L and the fifth distance M is 0.35, and the air volume of the centrifugal impeller 100 is increased by 10.2%.

[0155] Specifically, the ratio between the fourth distance L and the fifth distance M is 0.40, and the air volume of the centrifugal impeller 100 is increased by 7.2%.

[0156] Specifically, the ratio between the fourth distance L and the fifth distance M is 0.42, and the air volume of the centrifugal impeller 100 is increased by 5.7%.

[0157] Specifically, the fifth distance M is the total height of the centrifugal impeller 100, and the fourth distance L is the distance between the oblique transition position of the centrifugal impeller 100 and the bottom cover plate of the centrifugal impeller 100.

[0158] Specifically, by projecting a projection onto the centrifugal impeller 100 along its radial direction, an axial projection surface of the centrifugal impeller 100 can be formed. The fourth distance L can be obtained by measuring the distance between the side of the third edge segment 126 closest to the first edge segment 122 and the side of the cover 110 furthest from the blade 120. The fifth distance M can be obtained by measuring the distance between the side of the guide ring 130 furthest from the blade 120 and the side of the cover 110 furthest from the blade 120.

[0159] Specifically, such as Figure 6 and Figure 7 As shown, Figure 6 A velocity vector diagram showing the same diameter of the centrifugal impeller 100 at the airflow inlet and the centrifugal impeller 100 at the airflow outlet according to an embodiment of the present invention is shown. Figure 7 A velocity vector diagram is shown, illustrating that the curvature of the third edge segment 126 of a centrifugal impeller 100 according to an embodiment of the present invention is greater than the curvature of the second edge segment 124; in Figure 6 In the case where the diameter of the centrifugal impeller 100 at the airflow inlet is the same as the diameter of the centrifugal impeller 100 at the airflow outlet, vortices and backflow exist at the airflow outlet. Figure 7 In this process, by setting the curvature of the third edge segment 126 of the centrifugal impeller 100 to be greater than the curvature of the second edge segment 124, and by setting the ratio between the fourth distance L and the fifth distance M to 0.26 to 0.42, and by setting the ratio between the outer diameter of the cover 110 and the outer diameter of the guide ring 130 to 0.64 to 0.82, vortices and backflow at the airflow outlet are reduced.

[0160] like Figure 8 and Figure 9 As shown, Figure 8 A velocity contour plot is shown where the diameter of the centrifugal impeller 100 at the airflow inlet is the same as the diameter of the centrifugal impeller 100 at the airflow outlet, according to an embodiment of the present invention.Figure 9 A velocity cloud chart showing the curvature of the third edge section 126 of the centrifugal impeller 100 is greater than the curvature of the second edge section 124 according to one embodiment of the present application; in Figure 8 The low speed region exists at the gas flow outlet when the centrifugal impeller 100 diameter at the gas flow inlet is the same as the centrifugal impeller 100 diameter at the gas flow outlet. Figure 9 The low speed region at the gas flow outlet is reduced by setting the curvature of the third edge section 126 of the centrifugal impeller 100 to be greater than the curvature of the second edge section 124, and by setting the ratio between the fourth distance L and the fifth distance M to be 0.26 to 0.42, and by setting the ratio between the outer diameter of the cover 110 and the outer diameter of the inducer 130 to be 0.64 to 0.82.

[0161] As shown in Figure 10 and Figure 11 , Figure 10 A turbulent kinetic energy cloud chart showing the centrifugal impeller 100 diameter at the gas flow inlet is the same as the centrifugal impeller 100 diameter at the gas flow outlet according to one embodiment of the present application;

[0162] Figure 11 A turbulent kinetic energy cloud chart showing the curvature of the third edge section 126 of the centrifugal impeller 100 is greater than the curvature of the second edge section 124 according to one embodiment of the present application; in Figure 10 The high turbulent kinetic energy region exists at the gas flow outlet when the centrifugal impeller 100 diameter at the gas flow inlet is the same as the centrifugal impeller 100 diameter at the gas flow outlet. Figure 11 The high turbulent kinetic energy region at the gas flow outlet is reduced by setting the curvature of the third edge section 126 of the centrifugal impeller 100 to be greater than the curvature of the second edge section 124, and by setting the ratio between the fourth distance L and the fifth distance M to be 0.26 to 0.42, and by setting the ratio between the outer diameter of the cover 110 and the outer diameter of the inducer 130 to be 0.64 to 0.82.

[0163] Specifically, in Figure 6 the arrow F represents the vortex and the backflow. In Figure 8 the arrow G represents the low speed region. In Figure 10 the arrow H represents the high turbulent kinetic energy region.

[0164] The present application sets the ratio between the fourth distance L and the fifth distance M to be 0.26 to 0.42, and sets the ratio between the outer diameter of the cover 110 and the outer diameter of the inducer 130 to be 0.64 to 0.82, so as to optimize the centrifugal impeller 100 diameter at the gas flow outlet and the profile line at the blade 120 outlet, and to ensure that the gas flow outlet resistance is reduced, the vortex between the blades 120, the high turbulent kinetic energy region, the backflow and the low speed region between the blades 120 are reduced.

[0165] The embodiment provides a centrifugal impeller 100, in addition to the technical features of the above embodiment, and further comprises the following technical features.

[0166] The flow guide ring 130 is arranged in a ring shape, and the air flow can pass through the inner ring of the flow guide ring 130 to enter the area where the blades 120 are located.

[0167] In the embodiment, the flow guide ring 130 is arranged in a ring shape, and the air flow can pass through the inner ring of the flow guide ring 130 to enter the area where the blades 120 are located. By arranging the flow guide ring 130 in a ring shape, the air flow can be effectively guided to the position of the centrifugal impeller 100, the resistance of the incoming air is reduced, the air can more easily enter the centrifugal impeller 100, and thus the air inlet efficiency can be improved.

[0168] Specifically, Figure 12 The speed nephogram of the centrifugal impeller 100 in operation is shown in FIG. 12, the speed at each position can be determined by the Contour line, the values -6.0, -4.0, -2.0, 0, 2.0, 4.0, 6.0, 8.0, 10.0, 12.0, 14.0 in the figure represent the speed values at the positions where the corresponding colors are located, the speed unit is meter / second, and the arrow represents the flow direction of the air flow.

[0169] As Figure 13 and Figure 14 shown, Figure 13 FIG. 1 shows a structural schematic diagram of an impeller assembly 152 according to one embodiment of the application; Figure 14 FIG. 2 shows a structural schematic diagram of the impeller assembly 152 according to one embodiment of the application; in one embodiment of the application, an impeller assembly 152 is provided, comprising a volute 210 and a centrifugal impeller 100. The volute 210 has an air inlet 140 and an air outlet 142; the centrifugal impeller 100 is arranged in the volute 210, as Figure 4 shown, a first air flow channel 138 is formed between the circumferential outer edge of the centrifugal impeller 100 and the inner wall 226 of the volute 210; the width of the first air flow channel 138 in the radial direction of the centrifugal impeller 100 is a first width, the first width increases from the side of the first air flow channel 138 close to the air inlet 140 to the side of the first air flow channel 138 close to the air outlet 142; the centrifugal impeller 100 comprises a cover body 110, blades 120 and a flow guide ring 130; the number of the blades 120 is multiple, and the blades 120 are connected with the cover body 110; the flow guide ring 130 is located on the side of the blades 120 away from the cover body 110, and is connected with the blades 120.

[0170] In this embodiment, the impeller assembly 152 comprises a volute 210 and a centrifugal impeller 100. The volute 210 has an air inlet 140 and an air outlet 142 to facilitate the entry and exit of air flow. The centrifugal impeller 100 is arranged in the volute 210, and a first air flow channel 138 is formed between the circumferential outer edge of the centrifugal impeller 100 and the inner wall 226 of the volute 210, so that the air flow discharged by the centrifugal impeller 100 can enter the first air flow channel 138 to guide the air flow. The width of the first air flow channel 138 in the radial direction of the centrifugal impeller 100 is a first width, which increases from the side of the first air flow channel 138 close to the air inlet 140 to the side of the first air flow channel 138 close to the air outlet 142, to achieve the arrangement of the first air flow channel 138, forming a gradually expanding flow passage, which helps to gradually reduce the speed of the air flow during the flow process, converts the dynamic pressure of the air flow into static pressure, so that the air flow has a higher static pressure when flowing out of the volute 210, and therefore, the arrangement of the first air flow channel 138 can increase the ability to overcome resistance. The centrifugal impeller 100 comprises a cover 110, blades 120 and a flow guide ring 130. The blades 120 are connected to the cover 110 to achieve the installation of the plurality of blades 120. The flow guide ring 130 is located on the side of the blades 120 away from the cover 110 and is connected to the blades 120 to achieve the installation and fixation of the flow guide ring 130, so that the flow guide ring 130 can guide the air flow to ensure that the air flow can be purified by the centrifugal impeller 100.

[0171] Specifically, in the Figure 4 embodiment, X represents the first width.

[0172] Specifically, projecting the impeller assembly 152 along the radial direction of the impeller assembly 152 can form a radial projection plane of the impeller assembly 152, and the first width X can be obtained by measuring the distance between the circumferential outer edge of the centrifugal impeller 100 and the inner wall 226 of the volute 210.

[0173] The present embodiment provides an impeller assembly 152, in addition to the technical features of the above-mentioned embodiments, the present embodiment further comprises the following technical features.

[0174] As shown in Figure 1 and Figure 2 , a second air flow channel 154 is formed between two adjacent blades 120 in the plurality of blades 120; as shown in Figure 3 , wherein the width of the side of the second air flow channel 154 close to the air inlet 140 in the circumferential direction of the centrifugal impeller 100 is a second width; the width of the side of the second air flow channel 154 close to the air outlet 142 in the circumferential direction of the centrifugal impeller 100 is a third width; the second width is smaller than the third width.

[0175] In this embodiment, a second airflow channel 154 is formed between two adjacent blades 120, allowing airflow to pass through the second airflow channel 154. The width of the second airflow channel 154 in the circumferential direction of the centrifugal impeller 100 on the side near the air inlet 140 is a second width; the width of the second airflow channel 154 in the circumferential direction of the centrifugal impeller 100 on the side near the air outlet 142 is a third width. The second width is smaller than the third width, so that the arrangement of the second airflow channel 154 is different on the side near the air outlet 142 and the side near the air inlet 140. This helps to guide the airflow smoothly into the impeller. As the width of the second airflow channel 154 increases, the process of converting the kinetic energy of the airflow into static pressure energy becomes more stable, which is beneficial to subsequent airflow purification treatment.

[0176] Specifically, in Figure 3 In the diagram, Y represents the second width and Z represents the third width.

[0177] Specifically, by projecting a projection onto the centrifugal impeller 100 along its axial direction, a radial projection surface of the centrifugal impeller 100 can be formed. The second width Y can be obtained by measuring the circumferential distance between two adjacent blades 120 on the side near the inlet 140. The third width Z can be obtained by measuring the circumferential distance between two adjacent blades 120 on the side near the outlet 140.

[0178] This embodiment provides an impeller assembly 152, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0179] like Figure 2 As shown, the plurality of blades 120 include adjacent first blades 148 and second blades 150; on the projection surface obtained by projecting the centrifugal impeller 100 along a radial direction of the centrifugal impeller 100, the side edge of the first blade 148 is located on the positive pressure surface of the second blade 150.

[0180] In this embodiment, the plurality of blades 120 include adjacent first blades 148 and second blades 150. On the projection surface obtained by projecting the centrifugal impeller 100 along a radial direction of the centrifugal impeller 100, the side edge of the first blade 148 is located on the positive pressure surface of the second blade 150. The positive pressure surface is the area with higher pressure on the blade 120. The airflow is thrust at this position. When the impeller assembly 152 rotates, the airflow will be subjected to a stronger centrifugal force when passing between the first blade 148 and the second blade 150, thereby improving the purification efficiency.

[0181] Specifically, such as Figure 2 As shown,Figure 2 The projection surface is obtained by projecting the centrifugal impeller 100 along one radial direction.

[0182] This embodiment provides an impeller assembly 152, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0183] like Figure 2 As shown, in the radial extension direction of the blade 120, the length of the second blade 150 extending beyond the first blade 148 on the side near the air inlet 140 is the first length; in the radial extension direction of the blade 120, the length of the second blade 150 extending beyond the first blade 148 on the side near the air outlet 142 is the second length; the first length is greater than the second length.

[0184] In this embodiment, in the radial extension direction of the blade 120, the second blade 150 extends beyond the first blade 148 by a first length near the air inlet 140, thus arranging the first blade 148 and the second blade 150 near the air inlet 140. In the radial extension direction of the blade 120, the second blade 150 extends beyond the first blade 148 by a second length near the air outlet 142, thus arranging the first blade 148 and the second blade 150 near the air outlet 142. By setting the first length to be greater than the second length, the second blade 150 can contact the airflow earlier on the air inlet 140 side and guide the airflow into the centrifugal impeller 100. The shorter second length on the air outlet 142 side reduces the obstruction of the airflow by the blade 120, thereby improving the flow efficiency and stability of the airflow.

[0185] Specifically, in Figure 2 In this context, P represents the first length and Q represents the second length.

[0186] Specifically, by projecting a projection onto the centrifugal impeller 100 along its radial direction, an axial projection surface of the centrifugal impeller 100 can be formed. The first length P can be obtained by measuring the length of the second blade 150 extending beyond the first blade 148 on the side near the air inlet 140. The second length Q can be obtained by measuring the length of the second blade 150 extending beyond the first blade 148 on the side near the air outlet 142.

[0187] This embodiment provides an impeller assembly 152, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0188] like Figure 2 and Figure 3As shown, the first side edge 128 of the blade 120 on the air outlet side comprises a first edge section 122 and a second edge section 124. The second edge section 124 is closer to the air outlet 142 relative to the first edge section 122; wherein the blade 120 extends along a first direction, the second edge section 124 extends from a side close to the first edge section 122 to a side away from the first edge section 122 in a direction opposite to the first direction.

[0189] In this embodiment, the first side edge 128 of the blade 120 on the air outlet side comprises a first edge section 122 and a second edge section 124. The second edge section 124 is closer to the air outlet 142 relative to the first edge section 122 to achieve the arrangement of the first edge section 122 and the second edge section 124. The blade 120 extends along a first direction, the second edge section 124 extends from a side close to the first edge section 122 to a side away from the first edge section 122 in a direction opposite to the first direction, i.e. the first edge section 122 and the second edge section 124 extend along different directions, thereby forming a gradually expanding outlet on the air outlet side of the blade 120 to facilitate the increase of the air outlet volume, and reducing the contact between the airflow on the air outlet side and the blade 120 by optimizing the shape of the edge on the air outlet side of the blade 120, and reducing the vortex and turbulence generated by the airflow on the air outlet side of the blade 120.

[0190] Specifically, the first side edge 128 of the blade 120 on the air outlet side further comprises a third edge section 126, and two ends of the third edge section 126 are connected to the first edge section 122 and the second edge section 124 respectively.

[0191] Specifically, as Figure 3 shown, the first direction W is from the air inlet side of the blade 120 to the air outlet side of the blade 120.

[0192] The impeller assembly 152 of the present embodiment further comprises the following technical features in addition to the technical features of the above-mentioned embodiments.

[0193] The ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is greater than or equal to 0.64 and less than or equal to 0.82; and / or the first side edge 128 of the blade 120 on the air outlet side further comprises a third edge section 126, and two ends of the third edge section 126 are connected to the first edge section 122 and the second edge section 124 respectively; the distance between the side of the third edge section 126 close to the first edge section 122 and the side of the cover 110 away from the blade 120 is a fourth distance L; the distance between the side of the flow guide ring 130 away from the blade 120 and the side of the cover 110 away from the blade 120 is a fifth distance M; the ratio between the fourth distance L and the fifth distance M is greater than or equal to 0.26 and less than or equal to 0.42.

[0194] In this embodiment, the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is greater than or equal to 0.64 and less than or equal to 0.82, so as to adjust the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130. By setting the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 to 0.64-0.82, the diameters of the flow guide ring 130 and the cover 110 are optimized. As shown in Table 1, through tests, when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.64, the proportion of wind volume increase is 3.5%; when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.68, the proportion of wind volume increase is 4.3%; when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.73, the proportion of wind volume increase is 5.2%; when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.78, the proportion of wind volume increase is 4.7%; and when the ratio of the outer diameter of the cover 110 to the outer diameter of the flow guide ring 130 is 0.82, the proportion of wind volume increase is 3.6%, so that, during the operation of the centrifugal impeller 100, the air intake amount is increased, the impact and friction of the air flow at the inlet of the centrifugal impeller 100 are reduced, the air intake efficiency is improved, the flow state of the air flow is further adjusted, the resistance of the centrifugal impeller 100 to the air flow at the outlet of the centrifugal impeller 100 is reduced, the working efficiency and the wind volume of the centrifugal impeller 100 are improved, and the noise of the purifier 200 during operation is reduced. The two ends of the third edge section 126 are connected with the first edge section 122 and the second edge section 124 respectively, i.e., the third edge section 126 is located between the first edge section 122 and the second edge section 124. The distance between the side of the third edge section 126 close to the first edge section 122 and the side of the cover 110 away from the blades 120 is a fourth distance L; the distance between the side of the flow guide ring 130 away from the blades 120 and the side of the cover 110 away from the blades 120 is a fifth distance M, and the ratio between the fourth distance L and the fifth distance M is greater than or equal to 0.26 and less than or equal to 0.42, so as to optimize and adjust the contour line at the air outlet of the plurality of blades 120.As shown in Table 2, through testing, the air volume increased by 6.1% when the ratio of the fourth distance L to the fifth distance M was 0.26; by 8.3% when the ratio was 0.31; by 10.2% when the ratio was 0.35; by 7.2% when the ratio was 0.40; and by 5.7% when the ratio was 0.42. Therefore, by adjusting the ratio of the fourth distance L to the fifth distance M, the resistance of the centrifugal impeller 100 to the airflow at the airflow outlet can be reduced, thereby improving the working efficiency and airflow of the centrifugal impeller 100 and reducing the noise of the purifier 200 during operation.

[0195] This embodiment provides an impeller assembly 152, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0196] The second edge segment 124 is recessed towards the direction of the guide ring 130.

[0197] In this embodiment, the second edge segment 124 is recessed towards the guide ring 130 to achieve an optimized design of the second edge segment 124. This design can enhance the air intake capacity at the position of the second edge segment 124, optimize the airflow, reduce turbulence and eddies in the airflow at the second edge segment 124, improve the air purification capacity, increase the air volume of the centrifugal impeller 100, and also reduce the noise of the purifier during operation.

[0198] This embodiment provides an impeller assembly 152, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0199] The first edge segment 122 extends along the axial direction of the centrifugal impeller 100; or the first edge segment 122 extends from the side near the guide ring 130 to the side away from the guide ring 130 in a direction away from the axis of the centrifugal impeller 100.

[0200] In this embodiment, the first edge segment 122 extends along the axial direction of the centrifugal impeller 100, or the first edge segment 122 extends from the side near the guide ring 130 to the side away from the guide ring 130 in a direction away from the axis of the centrifugal impeller 100, so as to achieve the arrangement of the first edge segment 122, ensuring that the airflow can maintain a stable flow state when entering the centrifugal impeller 100, and avoiding airflow turbulence caused by changes in the first edge segment 122.

[0201] Specifically, the first edge segment 122 extends along the axial direction of the centrifugal impeller 100.

[0202] Specifically, the first edge section 122 extends from a side close to the guide circle 130 to a side away from the guide circle 130 in a direction away from the axis of the centrifugal impeller 100.

[0203] The embodiment provides a centrifugal impeller assembly 152, in addition to the technical features of the above-mentioned embodiments, and further comprises the following technical features.

[0204] As shown in the drawings, the second side edge 132 of the blade 120 on the air inlet side comprises a first flow guide section 134 and a second flow guide section 136, the first flow guide section 134 is closer to the guide circle 130 than the second flow guide section 136; in the radial direction of the centrifugal impeller 100, the second flow guide section 136 is arranged opposite to the second edge section 124; the first flow guide section 134 extends in an arc shape; the second flow guide section 136 extends in a linear shape and is parallel to the axis of the centrifugal impeller 100; or the second flow guide section 136 extends in a linear shape and is inclined relative to the axis of the centrifugal impeller 100; or the second flow guide section 136 extends in an arc shape, and the curvature of the second flow guide section 136 is smaller than that of the first flow guide section 134. Figure 4 In this embodiment, the second side edge 132 of the blade 120 on the air inlet side comprises a first flow guide section 134 and a second flow guide section 136, the first flow guide section 134 is closer to the guide circle 130 than the second flow guide section 136, so as to achieve the arrangement of the first flow guide section 134 and the second flow guide section 136. In the radial direction of the centrifugal impeller 100, the second flow guide section 136 is arranged opposite to the second edge section 124, that is, the second edge section 124 on the air outlet side of the blade 120 is at the same height as the second flow guide section 136, which can guide the air flow to smoothly enter the centrifugal impeller 100 on the air inlet side and be discharged on the air outlet side, reduce the turbulence and vortex phenomenon of the air flow between the blades 120, and improve the flow efficiency of the air flow by optimizing the flow path of the air flow. The first flow guide section 134 extends in an arc shape, which can reduce the vortex and resistance of the air at the air inlet, so that the air can more smoothly enter the area of the centrifugal impeller 100. The second flow guide section 136 extends in a linear shape and is parallel to the axis of the centrifugal impeller 100, so that the air flow enters the centrifugal impeller 100 at a certain speed and angle, ensuring the stability of the air flow and thus improving the purification efficiency. The second flow guide section 136 extends in a linear shape and is inclined relative to the axis of the centrifugal impeller 100, so that the air flow enters the centrifugal impeller 100 at a certain speed and angle, ensuring the stability of the air flow and thus improving the purification efficiency. The second flow guide section 136 extends in an arc shape, and the curvature of the second flow guide section 136 is smaller than that of the first flow guide section 134, so that the air flow enters the centrifugal impeller 100 at a certain speed and angle, ensuring the stability of the air flow and thus improving the purification efficiency.

[0205]

[0206] ​Specifically, the second drainage section 136 extends linearly and is parallel to the axis of the centrifugal impeller 100.

[0207] Specifically, the second drainage section 136 extends linearly and is inclined relative to the axis of the centrifugal impeller 100.

[0208] Specifically, the second drainage segment 136 extends in an arc shape, and the arc of the second drainage segment 136 is smaller than the arc of the first drainage segment 134.

[0209] This embodiment provides an impeller assembly 152, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0210] The connection points between the air inlet side of multiple blades 120 and the cover 110 are located on the same circle.

[0211] In this embodiment, the connection points between the air inlet side of the multiple blades 120 and the cover 110 are located on the same circle to enable the installation of the multiple blades 120, so that they can be evenly distributed among the multiple blades 120, reducing the non-uniformity of airflow on the air inlet side.

[0212] This embodiment provides an impeller assembly 152, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0213] like Figure 4 As shown, the volute 210 includes a first housing 144 and a second housing 146. The second housing 146 is closer to the air inlet 140 than the first housing 144; wherein the width of the first housing 144 is greater than the width of the second housing 146; or the inner diameter of the first housing 144 is greater than the inner diameter of the second housing 146.

[0214] In this embodiment, the volute 210 includes a first housing 144 and a second housing 146. The second housing 146 is closer to the air inlet 140 than the first housing 144 to facilitate the arrangement of the first housing 144 and the second housing 146. The width of the first housing 144 is greater than the width of the second housing 146, or the inner diameter of the first housing 144 is greater than the inner diameter of the second housing 146, so as to facilitate the installation of the centrifugal impeller 100 inside the second housing 146, such that a first airflow channel 138 is formed between the circumferential outer edge of the centrifugal impeller 100 and the inner wall of the second housing 146.

[0215] Specifically, in Figure 4 In the diagram, R represents the inner diameter of the first housing 144, and S represents the inner diameter of the second housing 146.

[0216] Specifically, the centrifugal impeller 100 is projected along the axial direction of the centrifugal impeller 100 to form a radial projection plane of the centrifugal impeller 100, and the inner diameter R of the first shell 144 can be obtained by measuring the diameter of the inner wall of the first shell 144.

[0217] Specifically, the width of the first airflow passage 138 in the radial direction of the centrifugal impeller 100 can be changed by changing the shape of the first shell 144, so as to increase the first airflow passage 138, without changing the diameter of the centrifugal impeller 100.

[0218] Specifically, as shown in Figure 4 T represents the diameter of the outlet of the guide vane 130, and U represents the diameter of the air inlet 140 of the centrifugal impeller 100. The outlet of the guide vane 130 and the air inlet 140 of the centrifugal impeller 100 have a gap in the radial direction of the centrifugal impeller 100, and the gap is greater than or equal to 0 and less than or equal to 8 mm. The smaller the gap, the smaller the backflow of the airflow, and the greater the flow rate of the whole machine. When T = U, the air inlet effect of the centrifugal impeller 100 is best.

[0219] Specifically, the centrifugal impeller 100 is projected along the axial direction of the centrifugal impeller 100 to form a radial projection plane of the centrifugal impeller 100, and the diameter of the outlet of the guide vane 130 can be obtained by measuring the diameter of the inner wall of the outlet of the guide vane 130. The diameter of the air inlet 140 of the centrifugal impeller 100 can be obtained by measuring the diameter of the inner wall of the air inlet 140 of the centrifugal impeller 100.

[0220] Specifically, in Figure 4 the arrow V represents the flow direction of the airflow in the centrifugal impeller 100.

[0221] As shown in Figure 15 and Figure 16 , Figure 15 a structure schematic diagram of a purifier 200 according to an embodiment of the present application is shown; Figure 16 a structure schematic diagram of a purifier 200 according to an embodiment of the present application is shown; a purifier 200 is provided in an embodiment of the present application, which comprises the centrifugal impeller 100 or the impeller assembly 152 in any of the above embodiments. Therefore, the purifier 200 has all the beneficial effects of the centrifugal impeller 100 or the impeller assembly 152.

[0222] Specifically, the purifier 200 is an air purifier.

[0223] Specifically, in the case of comprising the centrifugal impeller 100, the purifier is further provided with a volute 210, and the centrifugal impeller 100 is arranged in the volute 210.

[0224] The embodiment provides a purifier 200, and the purifier 200 further comprises the following technical features in addition to the technical features of the above-mentioned embodiment.

[0225] As shown in Figure 17 , the purifier 200 of the embodiment further comprises a bracket 214 and a driving component 216. The bracket 214 is provided with an air outlet channel 220; the mounting end of the driving component 216 is connected with the bracket 214, and the driving end of the driving component 216 is connected with the centrifugal impeller 100, so that the centrifugal impeller 100 can be driven to rotate. Figure 17 The A-A sectional structure schematic diagram of the purifier 200 is shown in Figure 16 . The purifier 200 further comprises a housing 208, a filtering component 204 and an air outlet grille 212. The housing 208 comprises an air inlet grille 202; the filtering component 204 is arranged in the air inlet grille 202, and the filtering component 204 is provided with an air inlet channel 206; the centrifugal impeller 100 is arranged in the housing 208 and opposite to the air inlet channel 206; the air outlet grille 212 is connected with the housing 208 and located on the side of the centrifugal impeller 100 away from the air inlet channel 206.

[0226] In the embodiment, the purifier 200 further comprises the housing 208, the filtering component 204 and the air outlet grille 212. The housing 208 comprises the air inlet grille 202; the filtering component 204 is arranged in the air inlet grille 202, and the filtering component 204 is provided with the air inlet channel 206, so as to realize installation and fixation of the filtering component 204, and thus external air can enter the filtering component 204 through the air inlet grille 202 for filtration. The centrifugal impeller 100 is arranged in the housing 208 and opposite to the air inlet channel 206, so as to realize installation of the centrifugal impeller 100. The air outlet grille 212 is connected with the housing 208 and located on the side of the centrifugal impeller 100 away from the air inlet channel 206, so as to realize installation and fixation of the air outlet grille 212, and thus the purified air can be discharged to the outside through the air outlet grille 212, so as to realize discharge of the purified air.

[0227] The embodiment provides a purifier 200, and the purifier 200 further comprises the following technical features in addition to the technical features of the above-mentioned embodiment.

[0228] As shown in Figure 13 , the purifier 200 further comprises the bracket 214 and the driving component 216. The bracket 214 is provided with the air outlet channel 220; the mounting end of the driving component 216 is connected with the bracket 214, and the driving end of the driving component 216 is connected with the centrifugal impeller 100, so that the centrifugal impeller 100 can be driven to rotate.

[0229] In this embodiment, the purifier 200 further comprises a bracket 214 and a driving component 216. The bracket 214 has an air outlet passage 220 to realize the mounting and fixing of the bracket 214, so that the purified air can be discharged through the air outlet passage 220. The mounting end of the driving component 216 is connected with the bracket 214, and the driving end of the driving component 216 is connected with the centrifugal impeller 100 to drive the centrifugal impeller 100 to rotate, so as to realize the mounting and fixing of the driving component 216, and then the driving force can be provided for the rotation of the centrifugal impeller 100, so that the centrifugal impeller 100 can form a high negative pressure area after rotation, thereby forming a pressure difference between the air inlet grille 202 and the centrifugal impeller 100, so that air can be sucked in for purification.

[0230] The purifier 200 provided in this embodiment further comprises the following technical features in addition to the technical features of the above-mentioned embodiments.

[0231] As shown in Figure 13 , the purifier 200 further comprises guide vanes 218, and the guide vanes 218 are multiple. The multiple guide vanes 218 are located in the air outlet passage 220 and are connected with the bracket 214.

[0232] In this embodiment, the purifier 200 further comprises guide vanes 218, and the guide vanes 218 are multiple. The multiple guide vanes 218 are located in the air outlet passage 220 and are connected with the bracket 214 to realize the mounting and fixing of the multiple guide vanes 218. By arranging multiple guide vanes 218 in the air outlet passage 220, the guide vanes 218 can purify the air discharged by the centrifugal impeller 100, ensure that the purified air can flow out in an orderly and smooth manner, reduce the turbulence and resistance of the air flow in the air outlet passage 220, and improve the overall efficiency of the air purifier.

[0233] The purifier 200 provided in this embodiment further comprises the following technical features in addition to the technical features of the above-mentioned embodiments.

[0234] As shown in Figure 13 , the purifier 200 further comprises a flow collector 222 and a mesh cover 224. The flow collector 222 is located on the side of the centrifugal impeller 100 close to the air inlet passage 206, and the mesh cover 224 is arranged on the flow collector 222.

[0235] In this embodiment, the purifier 200 further comprises a flow collector 222 and a mesh cover 224. The flow collector 222 is located on the side of the centrifugal impeller 100 close to the air inlet channel 206 to realize the mounting and fixing of the flow collector 222 so that the flow collector 222 can guide and uniformly introduce the air entering into the air inlet channel 206 into the fan, which can reduce the non-uniformity of the air flow, reduce the flow loss of the air flow, and improve the purification efficiency of the air purifier. The mesh cover 224 is arranged on the flow collector 222 to realize the mounting and fixing of the mesh cover 224 so that the mesh cover 224 can filter impurities in the air to avoid damage to the centrifugal impeller 100 and prolong the service life of the air purifier.

[0236] Specifically, the filter component 204 is a filter core, the mesh cover 224 is a front mesh cover, the driving component 216 is a motor, and the main working principle of the purifier 200 is that the air to be purified enters through the air inlet grille 202, is purified by the filter core, then passes through the front mesh cover, the flow collector 222, the volute 210, the centrifugal impeller 100, the guide vane 218, and finally passes through the rear air outlet grille 212 to discharge the purified air, so as to achieve the purpose of purifying the air. The motor mainly provides the driving force for the rotation of the centrifugal impeller 100, the centrifugal impeller 100 rotates to form a high negative pressure area near the centrifugal impeller 100, so that a pressure difference is formed between the air inlet grille 202 and the centrifugal impeller 100, thereby enabling the air to be sucked in for purification. Therefore, the core component that determines the performance of the entire air purifier is the centrifugal impeller 100, which mainly determines the air volume, power and noise of the purifier 200.

[0237] In the claims, the specification, and the drawings of the present application, the term "multiple" refers to two or more, unless otherwise explicitly limited, and the terms "upper", "lower", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only used to more conveniently describe the present application and make the description process more simple, and are not intended to indicate or imply that the devices or elements referred to must have the specific orientation, be constructed and operated in a specific orientation, and therefore these descriptions cannot be understood as limitations on the present application; the terms "connection", "installation", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection between multiple objects, or detachable connection between multiple objects, or integral connection; can be direct connection between multiple objects, or indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances of the above data.

[0238] In the claims, specification, and drawings of the present disclosure, terms have their plain, ordinary meaning unless otherwise indicated by the context of their use. The terms "comprise", "comprising", "include", "including", "have" and "having" are used interchangeably and mean "including but not limited to". It is further noted that the claims can be drafted to exclude any elements or steps from the disclosure, or to "not include" any elements or steps, or to "not have" any elements or steps. As such these terms are intended to operate as "open" and "inclusive" rather than "closed" or "exclusive".

[0239] The preferred embodiments of the application are described above in detail. The application may, however, be embodied in various ways without being limited to the embodiments described above, and various changes and modifications can be suggested to one skilled in the art. It is intended to encompass any and all such changes and modifications within the scope of the appended claims.

Claims

1. A centrifugal impeller, characterized in that, include: Cover; The blades are multiple, arranged circumferentially along the centrifugal impeller, and connected to the cover. A flow guide ring is located on the side of the blade away from the cover and is connected to the blade; The blade has a first edge segment, a second edge segment, and a third edge segment on the air outlet side. The first edge segment is located on the side of the blade near the guide ring, the second edge segment is located on the side of the blade near the cover, and the two ends of the third edge segment are respectively connected to the first edge segment and the second edge segment. The curvature of the third edge segment is greater than that of the second edge segment. The blades extend in an arc shape from the air inlet side to the air outlet side; In the axial direction of the centrifugal impeller, the second edge segment is recessed towards the direction of the guide ring; The distance between the third edge segment and the axis of the centrifugal impeller is the third distance; The third distance decreases from the side of the third edge segment closer to the first edge segment to the side farther away from the first edge segment; or The third distance increases first and then decreases from the side of the third edge segment closer to the first edge segment to the side farther away from the first edge segment; The distance between the side of the third edge segment closest to the first edge segment and the side of the cover away from the blade is the fourth distance; The distance between the side of the guide ring away from the blade and the side of the cover away from the blade is the fifth distance; The ratio between the fourth distance and the fifth distance is greater than or equal to 0.26 and less than or equal to 0.

42.

2. The centrifugal impeller according to claim 1, characterized in that, The blade includes a first guide section and a second guide section on the second side edge of the air inlet side, wherein the first guide section is closer to the guide ring than the second guide section; The first drainage segment extends in an arc shape; The second drainage section extends linearly and is parallel to the axis of the centrifugal impeller; or The second drainage section extends linearly and is inclined relative to the axis of the centrifugal impeller; or The second drainage segment extends in an arc shape, and the arc of the second drainage segment is smaller than that of the first drainage segment.

3. The centrifugal impeller according to claim 1, characterized in that, The blades are inclined relative to the axis of the centrifugal impeller from the side closer to the guide ring to the side closer to the cover; and / or The side of the blade closest to the cover is closer to the axis of the centrifugal impeller than the side of the blade closest to the guide ring.

4. The centrifugal impeller according to claim 1, characterized in that, The first edge segment extends linearly along the axial direction of the centrifugal impeller; or The first edge segment extends from the side close to the guide ring to the side away from the guide ring in a direction away from the axis of the centrifugal impeller.

5. The centrifugal impeller according to claim 1, characterized in that, The distance between the second edge segment and the axis of the centrifugal impeller is the second distance, which increases from the side of the second edge segment closer to the cover to the side farther away from the cover.

6. The centrifugal impeller according to claim 1, characterized in that, The outer diameter of the guide ring is larger than the outer diameter of the cover.

7. The centrifugal impeller according to claim 1, characterized in that, The ratio of the outer diameter of the cover to the outer diameter of the guide ring is greater than or equal to 0.64 and less than or equal to 0.

82.

8. The centrifugal impeller according to any one of claims 1 to 7, characterized in that, The guide ring is arranged in a ring shape, allowing airflow to pass through the inner ring of the guide ring and enter the area where the blade is located.

9. An impeller assembly, characterized in that, include: A volute, the volute having an air inlet and an air outlet; A centrifugal impeller is disposed inside the volute, and a first airflow channel is formed between the outer circumferential edge of the centrifugal impeller and the inner wall of the volute. The first airflow channel has a first width in the radial direction of the centrifugal impeller, and the first width increases from the side of the first airflow channel near the air inlet to the side of the first airflow channel near the air outlet. The centrifugal impeller includes a cover, blades, and a guide ring; The number of blades is multiple, and the multiple blades are arranged circumferentially along the centrifugal impeller and connected to the cover; The flow guide ring is located on the side of the blade away from the cover and is connected to the blade; The blade has a first edge segment, a second edge segment, and a third edge segment on the air outlet side. The first edge segment is located on the side of the blade near the air guide ring, the second edge segment is located on the side of the blade near the cover, and the two ends of the third edge segment are connected to the first edge segment and the second edge segment respectively. The curvature of the third edge segment is greater than that of the second edge segment. The blades extend in an arc shape from the air inlet side to the air outlet side; In the axial direction of the centrifugal impeller, the second edge segment is recessed towards the direction of the guide ring; The distance between the third edge segment and the axis of the centrifugal impeller is the third distance; The third distance decreases from the side of the third edge segment closer to the first edge segment to the side farther away from the first edge segment; or The third distance increases first and then decreases from the side of the third edge segment closer to the first edge segment to the side farther away from the first edge segment; The distance between the side of the third edge segment closest to the first edge segment and the side of the cover away from the blade is the fourth distance; The distance between the side of the guide ring away from the blade and the side of the cover away from the blade is the fifth distance; The ratio between the fourth distance and the fifth distance is greater than or equal to 0.26 and less than or equal to 0.

42.

10. The impeller assembly according to claim 9, characterized in that, A second airflow channel is formed between two adjacent blades of the plurality of blades; Wherein, the width of the second airflow channel on the side near the air inlet in the circumferential direction of the centrifugal impeller is the second width; The width of the second airflow channel on the side near the outlet in the circumferential direction of the centrifugal impeller is the third width; The second width is smaller than the third width.

11. The impeller assembly according to claim 9, characterized in that, The plurality of blades includes adjacent first blades and second blades; On the projection surface obtained by projecting the centrifugal impeller along one radial direction, the side edge of the first blade is located on the positive pressure surface of the second blade.

12. The impeller assembly according to claim 11, characterized in that, In the radial extension direction of the blade, the length by which the second blade extends beyond the first blade on the side near the air inlet is a first length; In the radial extension direction of the blade, the length by which the second blade extends beyond the first blade on the side near the air outlet is the second length; The first length is greater than the second length.

13. The impeller assembly according to claim 9, characterized in that, The blade extends along a first direction, and the second edge segment extends in the opposite direction to the first edge segment from the side of the second edge segment close to the first edge segment to the side of the second edge segment away from the first edge segment.

14. The impeller assembly according to claim 13, characterized in that, The ratio of the outer diameter of the cover to the outer diameter of the guide ring is greater than or equal to 0.64 and less than or equal to 0.

82.

15. The impeller assembly according to claim 13, characterized in that, The first edge segment extends along the axial direction of the centrifugal impeller; or The first edge segment extends from the side close to the guide ring to the side away from the guide ring in a direction away from the axis of the centrifugal impeller.

16. The impeller assembly according to claim 13, characterized in that, The blade includes a first guide section and a second guide section on the second side edge of the air inlet side, wherein the first guide section is closer to the guide ring than the second guide section; In the radial direction of the centrifugal impeller, the second guide section is arranged opposite to the second edge section; The first drainage segment extends in an arc shape; The second drainage section extends linearly and is parallel to the axis of the centrifugal impeller; or The second drainage section extends linearly and is inclined relative to the axis of the centrifugal impeller; or The second drainage segment extends in an arc shape, and the arc of the second drainage segment is smaller than that of the first drainage segment.

17. The impeller assembly according to claim 10, characterized in that, The air inlet sides of the multiple blades are connected to the cover on the same circle.

18. The impeller assembly according to any one of claims 9 to 17, characterized in that, The volute includes: First shell; A second housing, which is closer to the air inlet than the first housing; Wherein, the width of the first shell is greater than the width of the second shell; or The inner diameter of the first housing is larger than the inner diameter of the second housing.

19. A purifier, characterized in that, include: Centrifugal impeller as described in any one of claims 1 to 8; or The impeller assembly as described in any one of claims 9 to 18; A housing, the housing including an air intake grille; A filter element is disposed within the air intake grille and has an air intake channel. The centrifugal impeller is disposed inside the housing and is opposite to the air inlet channel; An exhaust grille is connected to the housing and is located on the side of the centrifugal impeller away from the air intake channel.

20. The air purifier according to claim 19, characterized in that, Also includes: A bracket, wherein the side of the bracket has an air outlet channel; A drive component, wherein the mounting end of the drive component is connected to the bracket, and the drive end of the drive component is connected to the centrifugal impeller, and is capable of driving the centrifugal impeller to rotate; Guide vanes, wherein there are multiple guide vanes, which are located within the air outlet channel and connected to the bracket; and / or The purifier also includes: A collector, wherein the collector is located on the side of the centrifugal impeller near the air intake passage; A mesh cover is disposed on the collector.

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