CN107218252B - Air inlet net cover and application thereof - Google Patents
Air inlet net cover and application thereof Download PDFInfo
- Publication number
- CN107218252B CN107218252B CN201610162944.8A CN201610162944A CN107218252B CN 107218252 B CN107218252 B CN 107218252B CN 201610162944 A CN201610162944 A CN 201610162944A CN 107218252 B CN107218252 B CN 107218252B
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- Prior art keywords
- air inlet
- ribs
- net cover
- air intake
- air
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an air inlet net cover and application thereof, comprising: the air inlet ribs are uniformly distributed, and the air inlet channel is bent into a certain angle by bending the ribs. Through the mode, the invention can effectively reduce the noise generated when the blower runs, and a user can operate the machine more comfortably, safely and environmentally friendly; the motor can also shield the internal parts of the machine, especially for the alternating current axial flow blower with the motor arranged in the air inlet pipe, the motor can be prevented from being exposed to the sight, sparks are shielded, and the grade of the whole machine is obviously improved.
Description
Technical Field
The invention relates to the field of gardening tools, in particular to an air inlet net cover and application thereof.
Background
In order to meet the safety requirements and protect the whole machine, ribs with proper density are generally distributed on the air inlet net cover, and the extending direction of the ribs is parallel to the axial direction, so that the rectification of air inlet flow is facilitated, the die stripping is convenient, and the processing is simple.
But the disadvantages are also apparent: 1. the rotational noise of the fan blade can be conveniently diffused out from the air inlet pipe, and the noise can be diffused to the periphery due to the horn mouth noise of the air inlet pipe, so that the influence range of the noise is obviously enlarged. 2. For the alternating current axial flow blower, the rear motor is just like naked, and a user can directly see the motor from the rear, so that when the whole blower runs, the spark caused by friction between the carbon brush and the commutator can be seen, and the product level is greatly reduced.
Disclosure of Invention
The invention mainly solves the technical problem of providing the air inlet net cover capable of effectively reducing noise generated when the blower operates and shielding internal parts of the machine and the application thereof.
In order to solve the technical problems, the invention adopts a technical scheme that: an air inlet net cover is provided, the air inlet net cover is positioned on a shell of a working appliance, air inlet channels are formed among air inlet ribs, and the air inlet channels of the net cover and the end face of the air inlet net cover form an angle of 0-90 degrees.
In a preferred embodiment of the present invention, the air inlet ribs of the mesh enclosure are arranged transversely or circumferentially.
In a preferred embodiment of the invention, the distance between adjacent air inlet channels is 5-10mm.
In a preferred embodiment of the present invention, the air inlet ribs arranged in parallel or in a circumferential direction are reinforcing ribs arranged longitudinally or radially.
The invention adopts another technical scheme that: an air inlet net cover is provided, the air inlet net cover is positioned on a shell of a working tool, an air inlet channel is formed among air inlet ribs, and the air inlet ribs are arranged in a staggered mode.
In a preferred embodiment of the present invention, the air inlet ribs are arranged transversely or longitudinally.
In a preferred embodiment of the present invention, the air inlet ribs are circumferentially arranged.
In a preferred embodiment of the present invention, the air inlet ribs form an angle of 0-90 ° with the end face of the air inlet mesh enclosure.
In a preferred embodiment of the present invention, the air inlet ribs have reinforcing ribs.
In a preferred embodiment of the invention, the distance between adjacent air inlet channels is 5-10mm.
The invention adopts another technical scheme that: the utility model provides an air inlet net cover, is located on the shell of work utensil, forms the air inlet passageway between the air inlet rib, the air inlet rib is equipped with the turning angle along the axis direction, the turning angle is 100-140 along the horizontal direction downward turning, has the hoop muscle of turning angle formed the air inlet passageway of slant.
In a preferred embodiment of the invention, the air inlet ribs comprise uniformly distributed annular ribs and transverse ribs.
In a preferred embodiment of the present invention, the distance between the air inlet ribs is 5-10mm.
In a preferred embodiment of the present invention, the vertical distance from the lowest point of the turning angle to the turning point of the adjacent circumferential rib is 1-10mm.
In a preferred embodiment of the invention, the angle a from the lowest point of the turning angle to the turning point of the adjacent circumferential rib is 60-85 degrees.
The invention adopts another technical scheme that: the utility model provides an application of air inlet screen panel in blowing and sucking instrument, blowing and sucking instrument include air inlet screen panel, air-supply line, fan blade, duct and air outlet, and the motor is arranged in the air-supply line.
In a preferred embodiment of the invention, the blowing and sucking tool is a blower, a cleaner or a blower. The beneficial effects of the invention are as follows: the invention can effectively reduce the noise generated when the blower runs, and the user is more comfortable, safer and more environment-friendly when operating the machine; the motor can also shield the internal parts of the machine, especially for the alternating current axial flow blower with the motor arranged in the air inlet pipe, the motor can be prevented from being exposed to the sight, sparks are shielded, and the grade of the whole machine is obviously improved.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic view of an air intake screen according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of a turning angle of the air intake screen shown in fig. 1;
FIG. 3 is a schematic view of the overall structure of the air intake screen shown in FIG. 1;
FIG. 4 is a schematic view of the structure of the air intake ribs of the air intake net cover according to the preferred embodiment of the present invention;
FIG. 5 is a schematic view of an air intake screen shown in FIG. 4
FIG. 6 is a schematic view showing the arrangement of the air inlet ribs of a preferred embodiment of the air inlet mesh enclosure of the present invention
FIG. 7 is a schematic view of the structure of an axial flow blower with noise sampling arranged behind the right side of the air duct;
FIG. 8 is a chart of old hood test data;
fig. 9 is a graph of test data for an air intake screen of the present invention.
Description of the embodiments
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention comprises the following steps:
an air inlet net cover is positioned on a shell of a working appliance, air inlet channels are formed among air inlet ribs, the direction of the air inlet channels of the net cover is defined as the direction D, the end face of the air inlet net cover is defined as the direction C, and an included angle between the direction C and the direction D is 0-180 degrees as shown in figure 6.
Preferably, the included angle between the C direction and the D direction is 20-80 degrees.
Preferably, the included angle between the C direction and the D direction is 52 degrees.
The air inlet ribs of the mesh enclosure are transversely distributed, and reinforcing ribs are longitudinally arranged to ensure the structural strength of the mesh enclosure.
The interval between the air inlet ribs is 5-10mm, preferably 8mm.
An air inlet net cover is positioned on a shell of a working tool, an air inlet channel is formed among air inlet ribs, and the air inlet ribs are arranged in a staggered mode. As shown in fig. 4 and 5. The air inlet ribs are transversely or longitudinally arranged, and are preferably transversely arranged. The air inlet ribs can be distributed in a circumferential direction and are divided into an inner ring and an outer ring, and the inner ring and the outer ring are arranged in a staggered manner. Reinforcing ribs are arranged among the ribs and used for increasing structural strength. The reinforcing ribs are radial or cross-shaped.
An air intake screen, comprising: the air inlet ribs include evenly distributed circumferential ribs, as shown in fig. 3.
The circumferential rib is axially provided with a turning angle structure, as shown in fig. 1 and 2. The turning angle is turned downwards along the horizontal direction, the turning angle b is 100-140 degrees, and the air inlet smoothness and the noise blocking degree are comprehensively considered to be determined. The circumferential ribs with turning angles form oblique air inlet channels, and the interval distance B between adjacent channels is 5-10mm. Is determined by comprehensively considering the air inlet quantity and the safety touch finger requirements. The vertical distance from the lowest point of the turning angle to the turning position of the adjacent annular ribs is 1-10mm, and the vertical distance is determined by comprehensively considering the noise blocking degree, the air inlet fluency, the shielding degree of internal parts of the air inlet pipe and the manufacturability of the die. The included angle a from the lowest turning angle point to the turning position of the adjacent circumferential ribs is 60-85 degrees, and is determined by considering the manufacturability of the die.
For the design of the turning angle structure, the requirement of the air intake quantity and the safety contact finger is considered, and the parameters are mutually influenced and need to be comprehensively considered.
Example 1: the turning angle b is 100 °. The circumferential ribs with turning angles form oblique air inlet channels, and the interval distance B between adjacent channels is 5mm. The vertical distance from the lowest point of the turning angle to the turning position of the adjacent circumferential ribs is 1mm. The included angle a from the lowest turning angle point to the turning position of the adjacent circumferential ribs is 60 degrees.
Example 2: the turning angle b is 120 °. The circumferential ribs with turning angles form oblique air inlet channels, and the interval distance B between adjacent channels is 7.5mm. The vertical distance from the lowest point of the turning angle to the turning position of the adjacent circumferential ribs is that the gap distance A is 2mm. The included angle a from the lowest turning angle point to the turning position of the adjacent circumferential ribs is 77 degrees.
Example 2: the turning angle b is 140 °. The circumferential ribs with turning angles form oblique air inlet channels, and the interval distance B between adjacent channels is 10mm. The vertical distance from the lowest point of the turning angle to the turning position of the adjacent circumferential ribs is that the gap distance A is 10mm. The included angle a from the lowest turning angle point to the turning position of the adjacent circumferential ribs is 85 degrees.
The circumferential ribs are arranged in a staggered manner from front to back as shown in fig. 4. The staggering comprises staggering with the same axial height of the front and rear circumferential ribs and staggering with different axial heights of the front and rear circumferential ribs. The staggering with different axial heights comprises two arrangements of front high and rear low and front low and rear high.
The application of the air inlet net cover in the blowing and sucking tool is shown in fig. 1, the blowing and sucking tool comprises an air inlet net cover, an air inlet pipe, a fan blade, a duct and an air outlet, wherein the air inlet net cover, the air inlet pipe, the fan blade, the duct and the air outlet are sequentially arranged along the axial direction, a motor is arranged in the air inlet pipe, and after the air inlet net cover, the fan blade is arranged in front of the fan blade.
The air inlet flow smoothly enters the air inlet pipe along the direction shown in fig. 2. The air inlet effect is not affected by the blocking of the ribs. When the fan blade rotates and the motor rotates to generate noise, and the noise is outwards diffused from the air inlet net cover in the air inlet pipe, most of the noise is reflected back to the air inlet pipe due to the blocking of the folded angle ribs, and the noise energy is continuously consumed and dissipated in the air inlet pipe; the noise diffused to the outside is mostly diffused downward, and is prevented from being transmitted to the user's ear. By adopting the air inlet net cover provided by the invention, the noise generated when the blowing and sucking tool operates can be obviously reduced.
The blowing and sucking tool is a blower, a dust collector or a blowing and sucking machine.
For a certain alternating current axial flow blower, noise sampling points are arranged behind the right side of the air inlet pipe, and as shown in fig. 7, sampling is performed at a coordinate position with a horizontal distance of 1m and a vertical distance of 2m from the axis of the blower. The same machine is used, and under the conditions of the same power and the same rotating speed, only the air inlet net cover is replaced for comparison test. FIG. 8 shows the test data of the old air intake cover, wherein points 1 and 2 represent the noise generated by the motor rotation and the noise generated by the fan blade rotation, and the measured noise intensities are 62.4dB (A) and 84.6dB (A), respectively. FIG. 9 shows the test data for the air intake screen of the present invention, with 1 and 2 points of noise intensity of 58.8dB (A) and 70.3dB (A), respectively.
For an axial flow blower, the most important source of noise is the noise generated by the rotation of the fan blade, and it can be seen from fig. 8 that the noise generated by the rotation of the fan blade is 10dB (a) higher than other noise, and in the calculation of the weight of the noise, other noise lower than 10dB (a) is negligible. Comparing fig. 8 and 9, it can be seen that the noise generated by the rotation of the fan blade is reduced from 84.6dB (a) to 70.3dB (a), the other noise is almost unchanged, and the noise of the sampling point can be reduced by 10-12dB (a) after weighing. The novel air inlet net cover has obvious noise reduction effect and has strong blocking effect on noise generated in the air inlet pipe. During actual use, noise at the ear of a user is mainly considered, and through testing, the noise can be reduced by 1-3dB (A) by using the novel air inlet net cover.
The air inlet net cover has the noise reduction function and can also shield the inner parts of the air inlet pipe. As shown in fig. 3, the shielding effect is very obvious especially for the alternating current axial flow blower with the motor arranged in the air inlet pipe, more than 90% of the sight line can be shielded when the motor is observed from the rear of the air inlet net cover along the axial direction, the naked motor can not be directly observed by a user, and sparks generated by the operation of the motor are not easy to observe.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (9)
1. An air inlet net cover is positioned on a shell of a working appliance, and an air inlet channel is formed between air inlet ribs, and is characterized in that the air inlet channel of the net cover and the end surface of the air inlet net cover form an angle of 0-180 degrees; the air inlet ribs comprise uniformly distributed circumferential ribs and transverse ribs, a turning angle structure is axially arranged on the circumferential ribs, the turning angles are turned downwards along the horizontal direction, the turning angle b is 100-140 degrees, and the circumferential ribs with the turning angles form an oblique air inlet channel; the interval distance B between the air inlet ribs is 5-10mm, and the vertical distance from the lowest turning angle point to the turning position of the adjacent annular ribs is 1-10mm; the included angle a from the lowest turning angle point to the turning position of the adjacent circumferential ribs is 60-85 degrees.
2. The air intake screen of claim 1, wherein the distance between adjacent air intake passages is 5-10mm.
3. The air intake screen of claim 1, wherein the air intake ribs are arranged transversely or circumferentially and there are reinforcing ribs arranged longitudinally or radially.
4. The air intake screen of claim 1, wherein the air intake ribs are staggered from one another.
5. The air intake screen of claim 4, wherein the air intake ribs are at an angle of 0-90 ° to the end face of the air intake screen.
6. The air intake screen of claim 4, wherein the air intake ribs have reinforcing ribs.
7. The air intake screen of claim 4, wherein the distance between adjacent air intake passages is 5-10mm.
8. An application of an air inlet net cover in a blowing and sucking tool, wherein the blowing and sucking tool comprises the air inlet net cover, an air inlet pipe, a fan blade, a duct and an air outlet, and a motor is arranged in the air inlet pipe, and the air inlet net cover is characterized in that the air inlet net cover is as claimed in any one of claims 1-7.
9. The use according to claim 8, wherein the blowing and sucking tool is a blower, a cleaner or a blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610162944.8A CN107218252B (en) | 2016-03-22 | 2016-03-22 | Air inlet net cover and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610162944.8A CN107218252B (en) | 2016-03-22 | 2016-03-22 | Air inlet net cover and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107218252A CN107218252A (en) | 2017-09-29 |
| CN107218252B true CN107218252B (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610162944.8A Active CN107218252B (en) | 2016-03-22 | 2016-03-22 | Air inlet net cover and application thereof |
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| Country | Link |
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| CN (1) | CN107218252B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165831A (en) * | 2018-06-25 | 2019-08-23 | 宁波洒哇地咔电器有限公司 | Electric machine structure and dust catcher |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204126922U (en) * | 2014-09-09 | 2015-01-28 | 苏州金莱克精密机械有限公司 | Blower |
| CN204253453U (en) * | 2014-09-09 | 2015-04-08 | 苏州金莱克精密机械有限公司 | Blower |
| CN104545698A (en) * | 2013-10-28 | 2015-04-29 | 江苏美的春花电器股份有限公司 | Motor air collection hood for dust collector, dust collector and air suction device of dust collector |
| CN105370592A (en) * | 2015-11-25 | 2016-03-02 | 常州格力博有限公司 | Direct-current brush axial flow blower |
| CN205533436U (en) * | 2016-03-22 | 2016-08-31 | 常州格力博有限公司 | Air inlet screen panel |
-
2016
- 2016-03-22 CN CN201610162944.8A patent/CN107218252B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104545698A (en) * | 2013-10-28 | 2015-04-29 | 江苏美的春花电器股份有限公司 | Motor air collection hood for dust collector, dust collector and air suction device of dust collector |
| CN204126922U (en) * | 2014-09-09 | 2015-01-28 | 苏州金莱克精密机械有限公司 | Blower |
| CN204253453U (en) * | 2014-09-09 | 2015-04-08 | 苏州金莱克精密机械有限公司 | Blower |
| CN105370592A (en) * | 2015-11-25 | 2016-03-02 | 常州格力博有限公司 | Direct-current brush axial flow blower |
| CN205533436U (en) * | 2016-03-22 | 2016-08-31 | 常州格力博有限公司 | Air inlet screen panel |
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| Publication number | Publication date |
|---|---|
| CN107218252A (en) | 2017-09-29 |
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Address after: 213000 Jiangsu province Changzhou Xingang Tower Road Economic Development Zone No. 65-1 Applicant after: Gelibo (Jiangsu) Co.,Ltd. Address before: 213000 Jiangsu city in Changzhou Province Economic Development Zone Xingang Zhonglou District Tower Road No. 65 Applicant before: CHANGZHOU GLOBE Co.,Ltd. |
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