CN115013332B - Fans and cleaning equipment - Google Patents
Fans and cleaning equipmentInfo
- Publication number
- CN115013332B CN115013332B CN202210617902.4A CN202210617902A CN115013332B CN 115013332 B CN115013332 B CN 115013332B CN 202210617902 A CN202210617902 A CN 202210617902A CN 115013332 B CN115013332 B CN 115013332B
- Authority
- CN
- China
- Prior art keywords
- outer cylinder
- cylinder
- fan
- impeller
- air flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/24—Hand-supported suction cleaners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a fan, which comprises a shell component, a fan housing, an impeller and a first-stage diffuser, wherein the shell component comprises an outer cylinder body and a mounting structure arranged in the outer cylinder body, the mounting structure is connected with a stator component and a rotor component, the fan housing is connected with the shell component, the impeller is positioned in the fan housing and is connected with a rotating shaft of the rotor component, the first-stage diffuser is connected with the shell component, the wall thickness of the outer cylinder body is T1, and the maximum outer diameter of the outer cylinder body is R2 along the radial direction of the shell component, so that the requirement that R2/T1 is more than or equal to 11 and less than or equal to 16 is met. The rotor assembly drives the impeller to rotate at a high speed, the impeller and the fan housing are matched to generate high-speed air flow, and the high-speed air flow is diffused through the primary diffuser to generate larger suction force, so that the use requirement of the cleaning equipment is met. The ratio of the wall thickness (T1) to the maximum outer diameter (R2) of the outer cylinder body ranges from 11 to 16, so that the air flow impact and diffusion loss can be effectively reduced, the pneumatic noise of the fan is reduced, and the running noise of the fan is improved.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a fan and cleaning equipment.
Background
In the related art, some cleaning apparatuses use a blower as a power source, such as a hand-held cleaner. When the motor of the fan drives the impeller to rotate, larger vacuum degree is formed at the inlet of the fan housing, and air flow is sucked from the opening of the fan housing, and flows out through the downstream diffuser after larger kinetic energy is obtained through the flow passage of the impeller. The fan adopted by the handheld dust collector has the characteristics of small volume, high rotating speed and the like, but the problem of large noise caused by the high rotating speed due to the small volume is solved.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the fan which can effectively reduce noise.
The invention also provides cleaning equipment adopting the fan.
The fan comprises a shell component, a fan cover, an impeller and a first-stage diffuser, wherein the shell component comprises an outer cylinder body and a mounting structure arranged in the outer cylinder body, the mounting structure is connected with a stator component and a rotor component, the fan cover is connected with the shell component, the impeller is positioned in the fan cover and is connected with a rotating shaft of the rotor component, the first-stage diffuser is connected with the shell component, the wall thickness of the outer cylinder body is T1 along the radial direction of the shell component, the maximum outer diameter of the outer cylinder body is R2, and the requirements that R2/T1 is not less than 11 and not more than 16 are met.
The fan provided by the embodiment of the first aspect of the invention has the advantages that the rotor assembly drives the impeller to rotate at a high speed, the impeller and the fan housing are matched to generate high-speed air flow, and the high-speed air flow is diffused through the first-stage diffuser to generate larger suction force, so that the use requirement of the cleaning equipment is met. The ratio of the wall thickness (T1) to the maximum outer diameter (R2) of the outer cylinder body ranges from 11 to 16, so that the air flow impact and diffusion loss can be effectively reduced, the pneumatic noise of the fan is reduced, and the running noise of the fan is improved.
According to some embodiments of the first aspect of the invention, the outer cylinder has a wall thickness of at least 1.8mm.
According to some embodiments of the first aspect of the present invention, the mounting structure includes an inner cylinder, a plurality of secondary blades are arranged between the inner cylinder and the outer cylinder to form a secondary diffuser, a distance between the inner cylinder and the outer cylinder along a radial direction of the housing assembly is W3, and an outer diameter of the inner cylinder is R4, so that R4/W3 is 6.5-10.
According to some embodiments of the first aspect of the invention, the distance between the inner cylinder and the outer cylinder is 3mm to 3.5mm.
According to some embodiments of the first aspect of the invention, an end of the outer cylinder facing away from the fan housing is a first end, an end of the secondary blade facing away from the fan housing is a second end, and the second end is located between the first end and the fan housing along an axial direction of the housing assembly.
According to some embodiments of the first aspect of the invention, the length of the secondary blade is less than or equal to the distance between the second end and the first end in the axial direction of the housing assembly.
According to some embodiments of the first aspect of the invention, the primary diffuser is provided with a mounting cylinder, the inner cylinder is provided with a mounting groove for accommodating the mounting cylinder, and an outer wall of the mounting cylinder is flush with an outer wall of the inner cylinder along a radial direction of the housing assembly.
According to some embodiments of the first aspect of the present invention, a connecting cylinder facing the outer cylinder is disposed at a periphery of the fan housing, a groove is disposed on an outer wall of the outer cylinder, and the connecting cylinder is inserted into the groove.
According to some embodiments of the first aspect of the present invention, a junction between the inner wall surface of the fan housing and the inner wall surface of the outer cylinder body is in smooth transition.
A cleaning device according to an embodiment of the second aspect of the present invention comprises a blower according to an embodiment of the first aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic view of a fan according to an embodiment of the first aspect of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of a first embodiment of a housing assembly according to the present invention;
FIG. 4 is a schematic diagram of a second embodiment of a housing assembly according to the first aspect of the present invention;
FIG. 5 is a cross-sectional view of a housing assembly in an embodiment of the first aspect of the invention;
FIG. 6 is a schematic view of a first stage diffuser according to an embodiment of the present invention;
FIG. 7 is a front view of a first stage diffuser according to an embodiment of the present invention;
fig. 8 is a cross-sectional view of a first stage diffuser in accordance with an embodiment of the present invention.
The reference numerals are as follows:
The diffuser comprises a housing assembly 100, a diffuser passage 101, a secondary diffuser passage 102, a mounting structure 110, an inner cylinder 111, a mounting groove 112, an outer cylinder 120, a first end 121, a groove 122, a secondary vane 130, and a second end 131;
a stator assembly 200;
a rotor assembly 300, a shaft 310;
a primary diffuser 400, primary vanes 410, and a mounting barrel 420;
An impeller 500;
a fan housing 600 and a connection cylinder 610;
Control panel 700.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
The cleaning device is a device for cleaning dust, of which a cleaner is the most commonly used cleaning device. The working principle of the dust collector is that a fan in the dust collector runs at a high speed, air and dust are sucked from a dust collecting opening, the dust is remained in a filter element, and the filtered air is discharged to the outside of the dust collector.
The fan is a core component of the dust collector and is used as a power source of the dust collector. The main components of the fan comprise a shell, a fan housing, a diffuser and an impeller. The diffuser and the shell are kept relatively static (fixedly connected), the impeller rotates at a high speed under the drive of the rotor, and air around the impeller is thrown out under the action of centrifugal force, so that the impeller has larger radial and tangential speeds. On one hand, negative pressure is formed in the fan cover, external air continuously flows to the impeller from the air inlet of the fan cover, and on the other hand, high-speed air flow thrown out by the impeller passes through the blades on the diffuser and is finally discharged. With the high-speed rotation of the impeller, the fan can continuously suck air, so that the functional requirement of the dust collector is met.
When the fan is in a working state, the impeller rotates to generate air flow, and the flow speed of the air flow is reduced when the air flow flows through the diffuser, so that the kinetic energy of the air is converted into static pressure energy, and the supercharging is realized. The diffusers can be classified into vaned diffusers and vaneless diffusers, and vaned diffusers are, as the name suggests, diffusers provided with vanes, restricting the flow direction of the air flow by the shape and angle of the vanes, forcing the air flow through a channel of a given geometry to achieve smaller dimensions and smaller flow losses. The diffuser to which the present invention relates is a vaned diffuser, hereinafter referred to as vaned diffuser. Specifically, the air flow passes through the channel formed between two adjacent blades of the diffuser, and in the flowing process, the flow speed of the air is reduced, so that the purpose of supercharging is achieved.
As shown in fig. 1, an embodiment of the first aspect of the present invention provides a fan, the fan includes a housing assembly 100, a stator assembly 200, a rotor assembly 300, a first stage diffuser 400, an impeller 500, a fan housing 600, and a control board 700, wherein the housing assembly 100 is a main body of the fan, a mounting structure 110 is disposed inside the housing assembly 100, the stator assembly 200 and the rotor assembly 300 are mounted in the mounting structure 110, the stator assembly 200 is fixed on a stator mounting portion of the mounting structure 110, the rotor assembly 300 can rotate relative to the stator assembly 200, the rotor assembly 300 and the stator assembly 200 form a driving mechanism, the fan housing 600 is connected to an end portion of the housing assembly 100, a wind guiding cavity is formed inside the fan housing 600, the fan housing 600 is in sealing connection with an outer wall of the housing assembly 100, the impeller 500 is located in the wind guiding cavity of the fan housing 600, a rotating shaft 310 of the rotor assembly 300 is fixedly connected with the impeller 500, and the impeller 500 is driven to rotate by the rotor assembly 300.
The outer wall of the shell assembly 100 is provided with an outer cylinder 120, a first-stage diffusion channel 101 is formed between the outer cylinder 120 and the mounting structure 110, the first-stage diffusion channel 101 is annular, the first-stage diffusion channel 101 is communicated with an air guide cavity, the first-stage diffuser 400 is fixedly connected to the end part of the mounting structure 110, the first-stage diffuser 400 is provided with a plurality of first-stage blades 410, part of the first-stage blades 410 are positioned in the first-stage diffusion channel 101, the shell assembly 100 is further provided with a second-stage diffusion channel 102, the second-stage diffusion channel 102 is positioned at the downstream of the first-stage diffusion channel 101, and a plurality of second-stage blades 130 are arranged in the second-stage diffusion channel 102. The control board 700 is connected to one end of the housing assembly 100 facing away from the fan housing 600, the control board 700 is electrically connected to the stator assembly 200, and the driving mechanism is controlled to operate by the control board 700.
When the fan operates, the rotor assembly 300 drives the impeller 500 to rotate at a high speed, and the impeller 500 and the fan housing 600 cooperate to generate a high-speed air flow, which flows into the diffuser passage 101, and is decelerated and increased in pressure by the plurality of primary blades 410 of the primary diffuser 400.
As shown in fig. 3 to 5, the outer cylinder 120 is used as the outer wall of the housing assembly 100, the outer cylinder 120 surrounds the mounting structure 110 and the first-stage diffuser 400, the air flow generated by the rotation of the impeller 500 flows in the outer cylinder 120, the wall thickness of the outer cylinder 120 is T1 along the radial direction of the housing assembly 100, the maximum outer diameter of the outer cylinder 120 is R2, the ratio of the wall thickness (T1) of the outer cylinder 120 to the maximum outer diameter (R2) of the outer cylinder 120 is 11 to 16, and the wall thickness of the outer cylinder 120 and the maximum outer diameter of the outer cylinder 120 have a specific ratio relationship, so that the air flow impact and diffusion loss can be effectively reduced, the sound power level value is reduced, the pneumatic noise of the fan is reduced, and the noise of the fan operation is improved.
It will be appreciated that the sound power level is the base 10 logarithm of the ratio of sound power to reference sound power multiplied by 10 in decibels. The numerical expression is Lw=10lg (W/Wo), and the common reference acoustic power Wo is 10 -12 W. The acoustic power is not dependent on distance, position or environment, and is a theoretical value and an absolute value.
It can be understood that the wall thickness (T1) of the outer cylinder 120 is at least 1.8mm, so that the airflow impact can be effectively reduced, a better noise reduction effect is obtained, the outer cylinder 120 has a larger structural strength and rigidity, when the high-speed airflow impacts the inner wall surface of the outer cylinder 120, the outer cylinder 120 can maintain a stable shape, the inner wall surface of the outer cylinder 120 is generally a cylindrical surface, the impact force can be balanced and counteracted, the outer cylinder 120 has a sufficient wall thickness, and when the high-speed airflow impact is received, the vibration is reduced, thereby being beneficial to reducing the noise.
Referring to fig. 3 to 5, the mounting structure 110 includes an inner cylinder 111, a first-stage diffuser passage 101 and a second-stage diffuser passage 102 between the inner cylinder 111 and the outer cylinder 120, and a plurality of second-stage vanes 130 disposed in the second-stage diffuser passage 102, thereby forming a second-stage diffuser. Along the radial direction of the shell assembly 100, the distance between the inner cylinder 111 and the outer cylinder 120 is defined as W3, namely the radial width of the secondary diffusion channel 102, the maximum outer diameter of the inner cylinder 111 is defined as R4, the outer diameter of the inner cylinder 111 is the position where the secondary blade 130 is connected with the inner cylinder 111, the ratio of the maximum outer diameter (R4) of the inner cylinder 111 to the outer diameter (W3) of the inner cylinder 111 is in the range of 6.5 to 10, the distance between the inner cylinder 111 and the outer cylinder 120 has a specific proportional relation with the outer diameter of the inner cylinder 111, the air flow impact and diffusion loss can be effectively reduced, the sound power level value is reduced, the pneumatic noise of a fan is reduced, and the running noise of the fan is improved.
It can be appreciated that the distance between the inner cylinder and the outer cylinder is 3mm to 3.5mm, the radial width of the secondary diffusion channel 102 can be matched with the airflow velocity output by the impeller 500, so that the airflow can be smoothly guided away, the airflow impact is effectively reduced, a better noise reduction effect is obtained, and the radial width of the secondary diffusion channel 102 has enough space for arranging a plurality of secondary blades 130, thereby meeting the requirement of secondary diffusion. The outer wall surface of the inner cylinder 111 and the inner wall surface of the outer cylinder 120 are cylindrical surfaces, so that the impact force of the air flow can be balanced and counteracted, the wall thickness of the outer cylinder 120 is enough, and when the impact of the high-speed air flow is received, the vibration is reduced, thereby being beneficial to reducing noise.
Referring to fig. 1 and 5, it can be understood that, along the axial direction of the housing assembly 100, the end of the outer cylinder 120 facing away from the fan housing 600 is a first end 121, the end of the second-stage blade 130 facing away from the fan housing 600 is a second end 131, and the length of the outer cylinder 120 exceeds the second-stage blade 130 in design, that is, the second end 131 is located between the first end 121 and the fan housing 600. Considering that the secondary blade 130 is attached to the inner wall surface of the outer cylinder 120, it is generally designed that both ends of the outer cylinder 120 exceed the secondary blade 130. Because, in the axial direction of the housing assembly 100, the axial position of the first end 121 exceeds the second end 131, the air flow is limited by the outer cylinder 120 after passing through the second-stage blades 130, and moves along the axial direction of the housing assembly 100, the outer cylinder 120 has a furling function on the air flow, so that the impact and diffusion loss of the air flow can be effectively reduced, the sound power level value is reduced, the pneumatic noise of the fan is reduced, and the noise of the fan operation is improved.
It will be appreciated that in the axial direction of the housing assembly, the length dimension of the secondary blade 130 is defined as L5, the distance between the second end 131 and the first end 121 is defined as L6, and the length of the secondary blade 130 is less than or equal to the distance between the second end 131 and the first end 121, that is, L5 less than or equal to L6, and not only the length of the first end 121 exceeds the second end 131, but also at least the length of the secondary blade 130, typically 30% to 50% of the length dimension of the secondary blade 130. The air flow is limited by the outer cylinder 120 after passing through the secondary blade 130 and moves along the axial direction of the shell assembly 100, the outer cylinder 120 has a furling function on the air flow, so that the impact and diffusion loss of the air flow can be effectively reduced, the sound power level value is reduced, the pneumatic noise of a fan is reduced, and the running noise of the fan is improved.
It should be understood that the above three structural forms, that is, the ratio of the wall thickness (T1) of the outer cylinder 120 to the maximum outer diameter (R2) of the outer cylinder 120 ranges from 11 to 16, the ratio of the maximum outer diameter (R4) of the inner cylinder 111 to the outer diameter (W3) of the inner cylinder 111 ranges from 6.5 to 10, and the second end 131 is disposed between the first end 121 and the fan housing 600, may be selected independently or in combination, and has the same priority, that is, may be combined randomly in order, and have various schemes.
Referring to fig. 1 and fig. 2, it may be understood that the first-stage diffuser 400 is provided with a mounting cylinder 420, the plurality of first-stage blades 410 are connected to an outer wall surface of the mounting cylinder 420 and are uniformly distributed along a circumferential direction of the mounting cylinder 420, the mounting cylinder 420 is sleeved on the mounting structure 110, the inner cylinder 111 is provided with a mounting groove 112 for accommodating the mounting cylinder 420, as shown in fig. 7 and fig. 8, an outer diameter of the mounting cylinder 420 is R7, in a radial direction of the housing assembly 100, an outer wall of the mounting cylinder 420 is flush with an outer wall of the inner cylinder 111, that is, r7=r4, an outer wall surface of the inner cylinder 111 and an outer wall surface of the mounting cylinder 420 are in the same size in the radial direction of the housing assembly 100, for example, an outer wall surface of the inner cylinder 111 and an outer wall surface of the mounting cylinder 420 form a smooth cylindrical surface with a uniform radius, when an airflow flows in the first-stage diffuser channel 101 and the second-stage diffuser channel 102, the smooth cylindrical surface is favorable for airflow to pass, and the airflow impact and diffusion loss can be effectively reduced, the sound power level value is reduced, aerodynamic noise of the fan is reduced, and noise of the fan operation is improved.
It can be appreciated that the mounting cylinder 420 is mounted in the mounting groove 112 of the inner cylinder 111, the mounting cylinder 420 and the inner cylinder 111 can be fixed in an interference fit manner, or can be bonded and fixed by glue, the glue can also fill the gap between the mounting cylinder 420 and the inner cylinder 111, prevent air flow from losing from the gap, eliminate noise of air flow passing through the gap or rotating at the gap, reduce pneumatic noise of the fan, and improve noise of fan operation.
Referring to fig. 1 and fig. 2, it can be understood that the periphery of the fan housing 600 is provided with a connecting tube 610 facing the outer cylinder 120, the outer wall of the outer cylinder 120 is provided with a groove 122, the connecting tube 610 is inserted into the groove 122, so as to realize connection and fixation of the outer cylinder 120 and the connecting tube 610, and the connecting structure is located at the outer side of the outer cylinder 120, which is beneficial to reducing air flow loss. The outer cylinder 120 and the connecting cylinder 610 can be fixed in an interference fit manner, and can be bonded and fixed by glue, the glue can also fill gaps between the outer cylinder 120 and the connecting cylinder 610, so that air flow loss from the gaps is prevented, noise of the air flow passing through the gaps or the noise of the air flow rotating at the gaps is eliminated, pneumatic noise of a fan is reduced, and noise of the fan operation is improved.
It can be appreciated that the connection between the inner wall surface of the fan housing 600 and the inner wall surface of the outer cylinder 120 forms a smooth curved surface, and when the air flows in the first-stage diffusion channel 101 and the second-stage diffusion channel 102, the smooth curved surface is beneficial to the air flow to pass through, so that the impact and diffusion loss of the air flow can be effectively reduced, the sound power level value is reduced, the pneumatic noise of the fan is reduced, and the running noise of the fan is improved.
It should be understood that the inner diameter of the fan housing 600 may be equal to the inner diameter of the outer cylinder 120, the inner wall surface of the fan housing 600 and the inner wall surface of the outer cylinder 120 may form a smooth cylindrical surface, or the inner wall surface of the fan housing 600 and the inner wall surface of the outer cylinder 120 may form a curved surface in smooth transition, and the shape of the curved surface may be selected in various ways, so as to meet the requirement of less air flow blocking.
An embodiment of the second aspect of the present invention proposes a cleaning apparatus, the cleaning apparatus comprising the blower of the embodiment of the first aspect, the blower comprising a housing assembly 100, a stator assembly 200, a rotor assembly 300, a primary diffuser 400, an impeller 500, a fan housing 600, and a control board 700, the housing assembly 100 being a main body of the blower, the housing assembly 100 being internally provided with a mounting structure 110, the stator assembly 200 and the rotor assembly 300 being mounted in the mounting structure 110, the stator assembly 200 being fixed to a stator mounting portion of the mounting structure 110, the rotor assembly 300 being rotatable relative to the stator assembly 200, the rotor assembly 300 and the stator assembly 200 constituting a driving mechanism, the fan housing 600 being connected to an end portion of the housing assembly 100, the inside of the fan housing 600 being formed with a wind guiding chamber, and the fan housing 600 being in sealing connection with an outer wall of the housing assembly 100, the impeller 500 being located in the wind guiding chamber of the fan housing 600, a rotation shaft 310 of the rotor assembly 300 being fixedly connected with the impeller 500, the impeller 500 being driven to rotate by the rotor assembly 300.
The outer wall of the shell assembly 100 is provided with the outer cylinder 120, the outer cylinder 120 serves as the outer wall of the shell assembly 100, the outer cylinder 120 surrounds the mounting structure 110 and the first-stage diffuser 400, air flows generated by rotation of the impeller 500 in the outer cylinder 120, the wall thickness of the outer cylinder 120 is T1 along the radial direction of the shell assembly 100, the maximum outer diameter of the outer cylinder 120 is R2, the ratio of the wall thickness (T1) of the outer cylinder 120 to the maximum outer diameter (R2) of the outer cylinder 120 is 11-16, the wall thickness of the outer cylinder 120 of the shell assembly 100 and the maximum outer diameter of the outer cylinder 120 have a specific proportional relation, the air flow impact and diffusion loss can be effectively reduced, the sound power level value is reduced, the pneumatic noise of a fan is reduced, and the noise of the fan operation is improved.
Referring to fig. 3 to 5, the mounting structure 110 includes an inner cylinder 111, a first-stage diffuser passage 101 and a second-stage diffuser passage 102 between the inner cylinder 111 and the outer cylinder 120, and a plurality of second-stage vanes 130 disposed in the second-stage diffuser passage 102, thereby forming a second-stage diffuser. Along the radial direction of the shell assembly 100, the distance between the inner cylinder 111 and the outer cylinder 120 is defined as W3, namely the radial width of the secondary diffusion channel 102, the maximum outer diameter of the inner cylinder 111 is defined as R4, the outer diameter of the inner cylinder 111 is the position where the secondary blade 130 is connected with the inner cylinder 111, the ratio of the maximum outer diameter (R4) of the inner cylinder 111 to the outer diameter (W3) of the inner cylinder 111 is in the range of 6.5 to 10, the distance between the inner cylinder 111 and the outer cylinder 120 has a specific proportional relation with the outer diameter of the inner cylinder 111, the air flow impact and diffusion loss can be effectively reduced, the sound power level value is reduced, the pneumatic noise of a fan is reduced, and the running noise of the fan is improved.
Referring to fig. 1 and 5, along the axial direction of the housing assembly 100, the end of the outer cylinder 120 facing away from the fan housing 600 is a first end 121, the end of the second-stage blade 130 facing away from the fan housing 600 is a second end 131, and the outer cylinder 120 is designed to have a length exceeding that of the second-stage blade 130, i.e., the second end 131 is located between the first end 121 and the fan housing 600. Considering that the secondary blade 130 is attached to the inner wall surface of the outer cylinder 120, it is generally designed that both ends of the outer cylinder 120 exceed the secondary blade 130. Because, in the axial direction of the housing assembly 100, the axial position of the first end 121 exceeds the second end 131, the air flow is limited by the outer cylinder 120 after passing through the second-stage blades 130, and moves along the axial direction of the housing assembly 100, the outer cylinder 120 has a furling function on the air flow, so that the impact and diffusion loss of the air flow can be effectively reduced, the sound power level value is reduced, the pneumatic noise of the fan is reduced, and the noise of the fan operation is improved.
It will be appreciated that in the axial direction of the housing assembly, the length dimension of the secondary blade 130 is defined as L5, the distance between the second end 131 and the first end 121 is defined as L6, and the length of the secondary blade 130 is less than or equal to the distance between the second end 131 and the first end 121, that is, L5 less than or equal to L6, and not only the length of the first end 121 exceeds the second end 131, but also at least the length of the secondary blade 130, typically 30% to 50% of the length dimension of the secondary blade 130. The air flow is limited by the outer cylinder 120 after passing through the secondary blade 130 and moves along the axial direction of the shell assembly 100, the outer cylinder 120 has a furling function on the air flow, so that the impact and diffusion loss of the air flow can be effectively reduced, the sound power level value is reduced, the pneumatic noise of a fan is reduced, and the running noise of the fan is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210617902.4A CN115013332B (en) | 2022-06-01 | 2022-06-01 | Fans and cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210617902.4A CN115013332B (en) | 2022-06-01 | 2022-06-01 | Fans and cleaning equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115013332A CN115013332A (en) | 2022-09-06 |
| CN115013332B true CN115013332B (en) | 2025-12-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210617902.4A Active CN115013332B (en) | 2022-06-01 | 2022-06-01 | Fans and cleaning equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115013332B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203404127U (en) * | 2012-07-05 | 2014-01-22 | 美蓓亚株式会社 | Centrifugal fan |
| CN113027794A (en) * | 2021-04-27 | 2021-06-25 | 广东威灵电机制造有限公司 | Fan and cleaning equipment |
| CN113775545A (en) * | 2021-09-06 | 2021-12-10 | 广东威灵电机制造有限公司 | An electric fan and cleaning equipment |
| CN217401227U (en) * | 2022-06-01 | 2022-09-09 | 广东威灵电机制造有限公司 | Fan and cleaning equipment |
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| JP6818443B2 (en) * | 2016-06-22 | 2021-01-20 | 日立グローバルライフソリューションズ株式会社 | Electric blower and vacuum cleaner equipped with it |
| JP7354569B2 (en) * | 2019-03-28 | 2023-10-03 | ニデック株式会社 | Air blower and vacuum cleaner |
| CN211573836U (en) * | 2020-02-05 | 2020-09-25 | 苏州爱普电器有限公司 | DC brushless electric fan for dust collector |
| CN111779686A (en) * | 2020-06-30 | 2020-10-16 | 深圳市赛昂思迪科技有限公司 | Distributed air duct fan capable of expanding blowing area |
| CN215109601U (en) * | 2021-05-28 | 2021-12-10 | 江苏美的清洁电器股份有限公司 | Fan assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203404127U (en) * | 2012-07-05 | 2014-01-22 | 美蓓亚株式会社 | Centrifugal fan |
| CN113027794A (en) * | 2021-04-27 | 2021-06-25 | 广东威灵电机制造有限公司 | Fan and cleaning equipment |
| CN113775545A (en) * | 2021-09-06 | 2021-12-10 | 广东威灵电机制造有限公司 | An electric fan and cleaning equipment |
| CN217401227U (en) * | 2022-06-01 | 2022-09-09 | 广东威灵电机制造有限公司 | Fan and cleaning equipment |
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| CN115013332A (en) | 2022-09-06 |
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