CN214533698U - Axial fan and low noise air purifier - Google Patents
Axial fan and low noise air purifier Download PDFInfo
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- CN214533698U CN214533698U CN202120556132.8U CN202120556132U CN214533698U CN 214533698 U CN214533698 U CN 214533698U CN 202120556132 U CN202120556132 U CN 202120556132U CN 214533698 U CN214533698 U CN 214533698U
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Abstract
The utility model discloses an axial fan, it includes wheel hub and fan blade, and odd number fan blade has been laid along its week side to wheel hub, and each fan blade mutual asymmetry, and each fan blade all has leading edge face, outer fringe face and trailing edge face, and the wheel hub edge is d1 to the diameter at fan rotation center, and the outer fringe face outside edge is d2 to the diameter at fan rotation center, and d1 and d2 satisfy 0.3 < d 1: d2 is less than 0.7; also disclosed is a low noise air purifier, comprising a housing, a filter screen and a fan assembly; the side of the shell is provided with an air inlet, and the top of the shell is provided with an air outlet; the filter screen is arranged on the side of the air inlet; the fan subassembly includes motor and axial fan, and axial fan sets up between filter screen and air outlet, and the motor is used for driving axial fan rotatory. The utility model discloses be equipped with odd number and the fan blade of mutual asymmetry on well wheel hub to carry out corresponding design to the shape and size of blade, make axial fan installation back, the resonance that produces when the blade rotates at a high speed is littleer, has reduced breather's noise at work.
Description
Technical Field
The utility model relates to an air purification technical field, concretely relates to axial fan and low noise air purifier.
Background
Some common ventilation devices (especially air purifiers) often use an axial fan, which is driven by a motor to rotate so that air enters from the front side of the fan, then the fan applies work to obtain pressure rise, and then the air exits from the rear side of the fan.
In the existing axial flow fan, because the axial flow fan is limited by the shape and size of the fan blades and an even number of or a symmetrical blade structure, when the axial flow fan is installed in the air interchanger to work, the blades rotate at a high speed to generate more resonance, so that the noise of the air interchanger during working is larger, and the working environment is influenced.
In addition, the conventional air purifier has the defects that the air inlet and outlet volume is small, the contact surface between the air and the filter screen in the air purifier is small, and the CADR value of the air purifier is small (the CADR value refers to the ratio of clean air output by the air purifier, and the higher the CADR value is, the higher the purification efficiency of the air purifier is).
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an axial fan and low noise air purifier.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an axial fan comprises a hub and blades, wherein an odd number of blades are distributed on the hub along the circumferential side of the hub, the blades are not symmetrical with each other, each blade is provided with a front edge surface formed on the advancing side in the rotating direction, an outer edge surface formed on the circumferential side and a rear edge surface formed on the other side of the front edge surface, the front edge surface and the outer edge surface are both arc-shaped surfaces, the diameter from the edge of the hub to the rotating center of the fan is d1, the diameter from the outermost edge of the outer edge surface to the rotating center of the fan is d2, and d1 and d2 satisfy 0.3 < d 1: d2 < 0.7.
Preferably, the fan blades are arranged on the periphery of the hub at equal angles, and the number Z of the fan blades satisfies the following relation:
Z＝πλm(1+d)/(1-d)τm，
wherein λ ism＝l/bm，
λmIs the aspect ratio of the mean radius of the blade, l is the extension length of the blade, bmThe geometric chord length of the fan blade;
d＝d1：d2；τmthe consistency of the blade cascade at the average radius of the fan blade.
Preferably, the following relationship is satisfied:
170mm＜d2＜200mm，60mm＜H＜90mm，
wherein H is the height of the axial fan.
Preferably, the hub is provided with five fan blades at equal angles along the peripheral side of the hub, and the fan blades satisfy the condition that d1 is more than 0.3: d2 < 0.4.
A low-noise air purifier comprises a shell, a filter screen and a fan assembly, wherein the filter screen and the fan assembly are arranged in the shell; the side of the shell is provided with an air inlet, and the top of the shell is provided with an air outlet; the filter screen is arranged on the side edge of the air inlet; the fan assembly comprises a motor and the axial flow fan, the axial flow fan is arranged between the filter screen and the air outlet, and the motor is used for driving the axial flow fan to rotate.
Preferably, the shell includes base, lower cover and upper cover, the lower cover install in on the base, the lateral wall of lower cover is provided with the air intake, the filter screen install in base and lower cover, the upper cover install in the top of lower cover, be provided with in the upper cover the air outlet.
Preferably, the lower cover is formed with along the circumference of its lateral wall and is the fretwork form the air intake, the top of upper cover is formed with and is the fretwork form the air outlet.
Preferably, the fan assembly further comprises an air guide frame, the air guide frame is arranged at the top of the lower cover and is provided with an air guide cavity, the motor is mounted on the air guide frame, and the axial flow fan is connected with a crankshaft of the motor and is located in the air guide cavity.
Preferably, the air guide frame comprises a bottom plate, an installation part and an air guide part, the bottom plate is hollow, the middle part of the bottom plate extends upwards to form the installation part, the edge extends upwards to form the air guide part, the motor is arranged on the installation part, the air guide cavity is arranged in the air guide part, a radial gap between the outermost edge of the outer edge surface of the fan blade and the side wall of the air guide cavity is delta, and delta is more than 2mm and less than 5 mm.
Preferably, the air guide frame further comprises a killing assembly, and the killing assembly is mounted at the bottom of the air guide frame and is located in the middle of the lower cover.
After the technical scheme is adopted, compared with the background art, the utility model, have following advantage:
1. the utility model discloses well wheel hub has laid odd number and the fan blade of mutual asymmetry along its week to carry out corresponding design to the shape and size of blade, make axial fan installation back, the resonance that produces when the blade rotates at a high speed is littleer, has reduced breather's noise at work.
2. The utility model discloses after installation fan subassembly in the well shell, the resonance that air purifier during operation produced is little, noise at work is low, has improved user's use and has experienced.
3. The utility model discloses be formed with the air intake that is the fretwork form in the circumference of lower cover lateral wall, the installation area of filter screen is bigger, and the air is from the circumference annular air inlet of lower cover, and the intake is big, the air is big with the contact surface of filter screen, and the air outlet that is the fretwork form by the upper cover top after filtering is discharged, and air purifier's CADR is big, and the purifying effect of air is better.
4. The utility model discloses radial clearance to between the outside edge of fan blade outer fringe face and the wind-guiding chamber lateral wall carries out corresponding design for axial fan both can not lead to the trouble with wind-guiding chamber lateral wall bumps, and the wind pressure when guaranteeing air escape again ensures great air output.
Drawings
FIG. 1 is a schematic structural diagram (top view) of the first embodiment;
FIG. 2 is a schematic structural diagram (side view) of the first embodiment;
FIG. 3 is a perspective view of the second embodiment;
FIG. 4 is a sectional view of the second embodiment;
FIG. 5 is an exploded view of the second embodiment;
FIG. 6 is a schematic perspective view of a fan assembly according to a second embodiment;
FIG. 7 is an exploded view of the fan assembly according to the second embodiment;
FIG. 8 is a cross-sectional view of a fan assembly according to a second embodiment.
Description of reference numerals:
a hub 100;
the fan blade comprises a fan blade 200, a front edge surface 210, an outer edge surface 220 and a rear edge surface 230;
the air conditioner comprises a shell 1, a base 11, a lower cover 12, an air inlet 121, an upper cover 13 and an air outlet 131;
a filter screen 2;
the fan assembly 3, the motor 31, the axial fan 32, the air guide frame 33, the air guide cavity 331, the bottom plate 332, the mounting part 333 and the air guide part 334;
the sterilizing assembly 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or position relationship shown in the drawings, and are only for convenience of description and simplification of the present invention, but do not indicate or imply that the device or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.
Example one
As shown in fig. 1 and fig. 2, the present embodiment discloses an axial fan, including a hub 100 and blades 200, the hub 100 is provided with an odd number of blades 200 along its circumferential side, and each blade 200 is not symmetrical to each other, each blade 200 has a leading edge surface 210 formed on the advancing side in the rotation direction, an outer edge surface 220 formed on the outer circumferential side, and a trailing edge surface 230 formed on the other side of the leading edge surface 210, the leading edge surface 210 and the outer edge surface 220 are both arc surfaces, the diameter from the edge of the hub 100 to the rotation center of the fan is d1, the diameter from the outermost edge of the outer edge surface 220 to the rotation center of the fan is d2, and d1 and d2 satisfy 0.3 < d 1: d2 < 0.7.
In the present embodiment, the blades 200 are disposed on the periphery of the hub 100 at equal angles, and the number Z of the blades 200 satisfies the following relation: z ═ pi λm(1+d)/(1-d)τmWherein λ ism＝l/bm，λmIs the aspect ratio of the mean radius of the blade, l is the extension length of the blade, bmThe geometric chord length of the fan blade; d-d 1: d 2; tau ismThe blade grid consistency at the average radius of the fan blade (the blade grid consistency refers to the ratio of the chord length at the average radius of the fan blade to the interval between two adjacent blades along the circumferential direction).
In the present embodiment, the hub 100 is provided with five blades 200 at equal angles along the peripheral side thereof, and satisfies 0.3 < d 1: d2 is less than 0.4, and the fan blade 200 also meets the following relation: 170mm < d2 < 200mm, 60mm < H < 90mm, where H is the height of the axial fan, and H is preferably 70 mm.
According to the relation among d1, d2 and the number Z, the relation between d and the number Z of the fan blades can be obtained as follows:
| d | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 |
| Z | 2-6 | 4-8 | 6-12 | 8-16 | 10-20 |
when Z is 5, the axial fan is mounted in the air purifier with good performance.
Example two
As shown in fig. 3 to 5, the present embodiment discloses a low noise air purifier, which includes a housing 1, a filter screen 2 disposed in the housing 1, and a fan assembly 3; the side of the shell 1 is provided with an air inlet 121, and the top is provided with an air outlet 131; the filter screen 2 is arranged at the side edge of the air inlet 121, and in the embodiment, the filter screen is a carbon-sprayed honeycomb cotton PP net containing H13-grade HEPA; the fan assembly 3 includes a motor 31 and the above axial flow fan 32, the axial flow fan 32 is disposed between the filter screen 2 and the air outlet 131, and the motor 31 is used for driving the axial flow fan 32 to rotate.
The housing 1 comprises a base 11, a lower cover 12 and an upper cover 13, wherein the lower cover 12 is installed on the base 11, an air inlet 121 is formed in the side wall of the lower cover 12, the filter screen 2 is installed in the base 11 and the lower cover 12, the upper cover 13 is installed at the top of the lower cover 12, and an air outlet 131 is formed in the upper cover 13. In this embodiment, the lower cover 12 is formed with a hollow-out air inlet 121 along the circumferential direction of the side wall thereof, and the top of the upper cover 13 is formed with a hollow-out air outlet 131.
As shown in fig. 1, 4 to 8, the fan assembly 3 further includes an air guiding frame 33, the air guiding frame 33 is disposed on the top of the lower cover 12, the air guiding frame 33 has an air guiding cavity 331, the motor 31 is mounted on the air guiding frame 33, and the axial fan 32 is connected to a crankshaft of the motor 31 and is located in the air guiding cavity 331.
The air guide frame 33 comprises a bottom plate 332, an installation part 333 and an air guide part 334, the bottom plate 332 is hollow, the middle part of the bottom plate 332 extends upwards to form the installation part 333, the edge of the bottom plate extends upwards to form the air guide part 334, the motor 31 is arranged on the installation part 333, an air guide cavity 331 is arranged in the air guide part 334, a radial gap between the outermost edge of the outer edge surface 220 of the fan blade 200 and the side wall of the air guide cavity 331 is delta, delta is more than 2mm and less than 5mm, and the radial gap delta is required to be the minimum as far as possible by considering the injection molding tolerance of the air guide frame 33, the deformation range of the axial flow fan 32 during high-speed operation and the air pressure exhausted by the air from the axial flow fan 32, in the embodiment, delta is preferably 3.8 mm.
In this embodiment, the working data of the axial flow fan 32 with different parameters is as follows:
comparing the fan 1 and the fan 2, it can be seen that the larger the diameter value of the fan is, the larger the area of the filter screen (HEPA) is, and the larger the CADR value is; compared with the fan 3 and the fan 4, the fan 2 has the advantages that the height of the fan is better than 70mm, so that the noise is lower, and a higher CADR value can be ensured; comparing fan 2 and fan 5, under the condition that parameters such as fan height, rotational speed are the same, 7 fan blades are bigger than 5 fan blade noises, and the performance is not good a lot, therefore 5 fan blades's axial fan installs all kinds of performances in air purifier better.
As shown in fig. 4, 5 and 7, the air guide frame further includes a sterilizing assembly 4, the sterilizing assembly 4 is mounted at the bottom of the air guide frame 33 and is located in the middle of the lower cover 12, and in this embodiment, the sterilizing assembly 4 employs a UV lamp. Motor 31 drives axial fan 32, and the air is from the even air inlet of air intake 121 four sides all around of lower cover 12, filters the back through filter screen 2, and the rethread disappears and kills the subassembly 4 secondary sterilization after, discharges from the air outlet 131 at upper cover 13 top to realize the air cycle purifying effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The axial flow fan is characterized by comprising a hub and blades, wherein odd blades are distributed on the hub along the peripheral side of the hub, the blades are not symmetrical with each other, each blade is provided with a front edge surface formed on the advancing side in the rotating direction, an outer edge surface formed on the peripheral side and a rear edge surface formed on the other side of the front edge surface, the front edge surface and the outer edge surface are both arc-shaped surfaces, the diameter from the edge of the hub to the rotating center of the fan is d1, the diameter from the outermost edge of the outer edge surface to the rotating center of the fan is d2, and d1 and d2 satisfy 0.3 < d 1: d2 < 0.7.
2. The axial flow fan according to claim 1, wherein the blades are arranged on the peripheral side of the hub at equal angles, and the number Z of the blades satisfies the following relation:
Z＝πλm(1+d)/(1-d)τm，
wherein λ ism＝l/bm，
λmIs the aspect ratio of the mean radius of the blade, l is the extension length of the blade, bmThe geometric chord length of the fan blade;
d＝d1：d2；τmthe consistency of the blade cascade at the average radius of the fan blade.
3. The axial flow fan of claim 2, wherein the following relationship is satisfied:
170mm＜d2＜200mm，60mm＜H＜90mm，
wherein H is the height of the axial fan.
4. The axial flow fan of claim 1, wherein said hub is provided with five said blades at equal angles along its peripheral side, and satisfies 0.3 < d 1: d2 < 0.4.
5. A low-noise air purifier is characterized by comprising a shell, a filter screen and a fan assembly, wherein the filter screen and the fan assembly are arranged in the shell; the side of the shell is provided with an air inlet, and the top of the shell is provided with an air outlet; the filter screen is arranged on the side edge of the air inlet; the fan assembly comprises a motor and the axial flow fan as claimed in any one of claims 1 to 4, the axial flow fan is arranged between the filter screen and the air outlet, and the motor is used for driving the axial flow fan to rotate.
6. The low noise air purifier of claim 5, wherein the housing comprises a base, a lower cover and an upper cover, the lower cover is mounted on the base, the side wall of the lower cover is provided with the air inlet, the filter screen is mounted in the base and the lower cover, the upper cover is mounted on the top of the lower cover, and the air outlet is arranged in the upper cover.
7. The low noise air purifier of claim 6, wherein the lower cover is formed with the air inlet in a hollow shape along a circumferential direction of a sidewall thereof, and the top of the upper cover is formed with the air outlet in a hollow shape.
8. The low noise air cleaner of claim 6, wherein the fan assembly further comprises a wind guide frame disposed on a top of the lower cover, the wind guide frame having a wind guide cavity, the motor being mounted on the wind guide frame, and the axial fan being coupled to a crankshaft of the motor and located in the wind guide cavity.
9. The low-noise air purifier as claimed in claim 8, wherein the air guiding frame comprises a bottom plate, a mounting portion and an air guiding portion, the bottom plate is hollow, the middle portion of the bottom plate extends upwards to form the mounting portion, the edge of the bottom plate extends upwards to form the air guiding portion, the motor is arranged on the mounting portion, the air guiding portion is provided with the air guiding cavity, a radial gap between the outermost edge of the outer edge surface of the fan blade and the side wall of the air guiding cavity is δ, and 2mm < δ < 5 mm.
10. The low noise air cleaner of claim 8, further comprising a sterilizing assembly installed at a bottom of the air guide frame and at a middle portion of the lower cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120556132.8U CN214533698U (en) | 2021-03-18 | 2021-03-18 | Axial fan and low noise air purifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120556132.8U CN214533698U (en) | 2021-03-18 | 2021-03-18 | Axial fan and low noise air purifier |
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| Publication Number | Publication Date |
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| CN214533698U true CN214533698U (en) | 2021-10-29 |
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| CN202120556132.8U Active CN214533698U (en) | 2021-03-18 | 2021-03-18 | Axial fan and low noise air purifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117146364A (en) * | 2023-09-01 | 2023-12-01 | 广东英为拓科技有限公司 | Air purifier with uniformly filtered filter element |
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2021
- 2021-03-18 CN CN202120556132.8U patent/CN214533698U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117146364A (en) * | 2023-09-01 | 2023-12-01 | 广东英为拓科技有限公司 | Air purifier with uniformly filtered filter element |
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