CN114165483B - Air duct structure of ventilator - Google Patents
Air duct structure of ventilator Download PDFInfo
- Publication number
- CN114165483B CN114165483B CN202111345627.7A CN202111345627A CN114165483B CN 114165483 B CN114165483 B CN 114165483B CN 202111345627 A CN202111345627 A CN 202111345627A CN 114165483 B CN114165483 B CN 114165483B
- Authority
- CN
- China
- Prior art keywords
- volute
- fan rotor
- rectifying
- connecting piece
- inlet
- 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.)
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Links
- 238000009434 installation Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- F04D29/42—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
-
- 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
-
- 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
- F04D29/08—Sealings
- F04D29/083—Sealings especially 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
-
- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
-
- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
Landscapes
- 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 duct structure of a ventilator, which belongs to the field of fans, and comprises an inlet bellows, a volute and a centrifugal fan rotor; the outlet end of the inlet bellows is communicated with the volute, and a centrifugal fan rotor is arranged in the volute; the centrifugal fan rotor is driven to rotate by a motor. The problems that the flow is affected due to unreasonable overall structure layout of the ventilator under the condition of limited space are solved by arranging the filter screen, the rotor, the volute and other parts.
Description
Technical Field
The invention belongs to the field of fans, and particularly relates to an air duct structure of a ventilator.
Background
Nowadays, with the improvement of the living standard of people, more and more families are provided with air conditioning equipment. In hot summer, the problem of ventilation of the closed space becomes gradually sharp when enjoying that the air conditioner brings a cool one, and more air conditioners begin to match corresponding ventilation systems, but many ventilation devices have the conditions of oversized space and unreasonable layout in space, and meanwhile, many structures with overlarge local losses exist in the current air duct design, so that the working efficiency of the ventilator can be seriously influenced. Specifically, the following problems exist: the existing ventilator has the problem that the working efficiency of the ventilator is affected due to unreasonable design on the air duct structure; the prior ventilator has the problem that the limited space cannot be reasonably utilized in structure, namely, the compact ventilator is deficient.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an air duct structure of a ventilator, which solves the problem that the flow is influenced due to unreasonable overall structure layout of the ventilator under the condition of limited space by arranging a filter screen, a rotor, a volute and other parts.
The present invention achieves the above technical object by the following means.
An air duct structure of a ventilator comprises an inlet bellows, a volute and a centrifugal fan rotor; the outlet end of the inlet bellows is communicated with the volute, and a centrifugal fan rotor is arranged in the volute; the centrifugal fan rotor is driven to rotate by a motor.
Further, the inlet bellows, the rectifying connector and the volute are connected together through a plurality of long screws; the rectifying connecting piece is a hollow pipe, one end of the rectifying connecting piece extends into the volute, and the other end of the rectifying connecting piece is arranged between the inlet bellows and the volute.
Further, the rectifying connecting piece is an elastic element, and the rectifying connecting piece extends into the volute section to be in a tapered shape.
Further, a rubber gasket is arranged in a gap between the rectifying connecting piece and the inlet bellows as well as between the rectifying connecting piece and the volute.
Further, an air inlet is formed in one side face of the inlet bellows, a filter screen and an arc-shaped baffle are arranged in the inlet bellows, the arc-shaped baffle is arranged opposite to the side face where the air inlet is formed, and gas enters through the air inlet and then is changed in direction by the arc-shaped baffle and then enters through the filter screen.
Further, the three filter screens are arranged, and the transverse cross section of the graph formed by the three filter screens and the arc-shaped baffle is of a quadrilateral structure.
Further, the centrifugal fan rotor is a multi-wing centrifugal fan rotor.
Further, a fan rotor rectifying piece is arranged at the center of the centrifugal fan rotor, the longitudinal section of the fan rotor rectifying piece is of an inverted triangle structure, and an output shaft of the motor is arranged on the fan rotor rectifying piece.
Furthermore, the input end of the volute is opposite to the fan rotor rectifying piece, and the output end of the volute is communicated with a compressed air channel.
Further, a tapered roller bearing is arranged on the volute, an output shaft of the motor is supported by the tapered roller bearing, and a baffle ring is arranged on one side of the tapered roller bearing.
The beneficial effects are that:
1. compared with the existing ventilator design, the invention provides a novel ventilator arrangement mode, the structure is relatively simple, the space utilization rate of the ventilator impeller is greatly increased structurally, and larger flow output can be ensured under the limited space. Meanwhile, compared with the complex air duct structure of most ventilators with filter screens in the current market, the scheme provided by the invention can ensure that the loss of air in the air duct is smaller, the energy utilization rate is higher, and the boosting is larger.
2. The longitudinal section of the fan rotor rectifying piece is of an inverted triangle structure, the structure can better adjust the flowing direction of gas, and the loss of chamber gas in the air duct is smaller.
3. The rectifying connecting piece is arranged on one hand, so that the installation and the disassembly between the inlet bellows and the volute are convenient, the air tightness between the inlet bellows and the volute is improved, and on the other hand, the rectifying connecting piece is arranged on the volute part and is a tapered pipe, and the flow speed of air is regulated.
4. According to the invention, the arc-shaped baffle plate and the filter screen are arranged, on one hand, the direction of the gas speed is changed by the arc-shaped baffle plate, on the other hand, external particles sucked into the ventilator are blocked, one side of the side edge of the inlet bellows can be opened so as to replace the filter screen, and the filter screen is in three groups and is in a three-side semi-surrounding structure in the inlet bellows so as to ensure that all air can enter the ventilator rotor after passing through the filter screen.
Drawings
FIG. 1 is a schematic view of the overall structure of an air duct structure of a ventilator according to the present invention;
FIG. 2 is a schematic view of the internal structure of FIG. 1;
FIG. 3 is a schematic view of the internal bottom structure of FIG. 1;
FIG. 4 is a schematic view of the centrifugal fan rotor of FIG. 2;
fig. 5 is an enlarged view of a portion of the mating portion of the inlet bellows, volute, and finishing connection.
Reference numerals:
1-an inlet bellows; 2-a volute; 3-rectifying connection; 4-a centrifugal fan rotor; 5-a fan rotor fairing; 6-an electric motor; 7-a filter screen; 8-compressing the air duct; 9-an air inlet; 10-an exhaust outlet; 11-short screws; 12-long screws; 13-rubber gaskets; 14-tapered roller bearings; 15-baffle ring; 16-arc baffle.
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 and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
An air duct structure of a ventilator comprises an inlet air box 1, a volute 2 and a centrifugal fan rotor 4; the outlet end of the inlet bellows 1 is communicated with the volute 2, and a centrifugal fan rotor 4 is arranged inside the volute 2; the centrifugal fan rotor 4 is driven to rotate by a motor 6.
Wherein the inlet bellows 1, the rectifying connector 3 and the volute 2 are connected together through a plurality of long screws 12; the rectifying connecting piece 3 is a hollow pipe, one end of the rectifying connecting piece extends into the volute 2, and the other end of the rectifying connecting piece is arranged between the inlet bellows 1 and the volute 2.
The rectifying connecting piece 3 is an elastic element, and the rectifying connecting piece 3 extends into the volute 2 section to be in a tapered shape.
A rubber gasket 13 is arranged in a gap between the rectifying connecting piece 3 and the inlet bellows 1 as well as between the rectifying connecting piece and the volute 2.
An air inlet 9 is formed in one side face of the inlet bellows 1, a filter screen 7 and an arc-shaped baffle 16 are arranged in the inlet bellows 1, the arc-shaped baffle 16 is arranged opposite to the side face where the air inlet 9 is formed, and gas enters through the air inlet 9, is redirected by the arc-shaped baffle 16 and enters through the filter screen 7.
The filter screen 7 has three pieces, and the transverse section of the filter screen and the arc-shaped baffle 16 is similar to a quadrilateral structure.
The centrifugal fan rotor 4 is a multi-wing centrifugal fan rotor.
The centrifugal fan rotor 4 is provided with a fan rotor rectifying piece 5 at the center, the longitudinal section of the fan rotor rectifying piece 5 is of an inverted triangle structure, and an output shaft of the motor 6 is arranged on the fan rotor rectifying piece 5.
The input end of the volute 2 is opposite to the fan rotor rectifying piece 5, and the output end of the volute is communicated with a compressed air channel 8.
The spiral case 2 is provided with a tapered roller bearing 14, an output shaft of the motor 6 is supported by the tapered roller bearing 14, and one side of the tapered roller bearing 14 is provided with a baffle ring 15.
The invention relates to a ventilator air duct structure, which is shown in the attached drawings 1-4, and comprises an inlet air box 1, wherein an air inlet 9 connected with external air is arranged on the side surface of the inlet air box 1, an air-tight arc baffle 16 is designed in the part, opposite to the air inlet 9, of the inlet air box 1, on one hand, the air speed direction of the arc baffle is changed, on the other hand, external particles sucked into a ventilator are blocked, one side surface of the side edge of the inlet air box 1 can be opened so as to replace a filter screen 7, and the filter screen is in a three-sided semi-enclosed structure in the inlet air box 1, so that all air can enter the interior of a ventilator rotor after passing through the filter screen. The filter screen 7 is provided with a small slot inside the inlet bellows 1 to limit its variation. The filter screen 7 and the transverse section of the arc-shaped baffle form a quadrilateral structure.
The top position of the inlet bellows 1 is connected with the volute 2 through the rectifying connecting piece 3 and is fixed by long bolts 12, the number of the long bolts 12 is six, the long bolts 12 are uniformly distributed in a ring shape, and the long bolts are positioned at the inner side of the filter screen 7 in the inlet bellows 1. The axial opening at the top end of the volute 2 is provided with a centrifugal fan rotor 4 connected with a motor 6, a tapered roller bearing 14 is used as a bearing part, the tapered roller bearing 14 is a double-row tapered roller bearing, and meanwhile, a baffle ring 15 is arranged on a shaft to limit the axial displacement of the bearing; the motor 6 may be fixed to the volute 2 in different manners according to the actual working requirements, and the manners of fixing the motor to the volute may be selected according to different sizes, including but not limited to screwing, bolting, etc.
The fan rotor rectifying piece 5 is also arranged on the centrifugal fan rotor 4 and is fixed by means of the short screws 11, the number of the short screws is three, the short screws are uniformly distributed in a ring shape and distributed at the connection part of the fan rotor rectifying piece 5 and the fan blade disc in a circumferential surrounding rotating shaft mode, the replaceable compressed air duct 8 is arranged at the outlet part of the volute 2, and the new compressed air duct 8 can be replaced for adjustment according to the different positions of the air outlet 10, namely the air outlet 10 with an axial opening in the case. The side wall of the volute 5 is provided with a hole slightly larger than the outer diameter of the impeller of the centrifugal fan rotor 4 so as to facilitate the installation of the impeller. The fan rotor fairing 5 is mounted by means of a short screw 11 at a position facing the axial inlet of the volute 2.
In the embodiment of the present invention, as shown in fig. 5, rubber gaskets 13 are arranged between the rectifying connector 3 and the inlet bellows 1 and between the rectifying connector and the volute 2, so as to ensure the tightness of the structure.
In the embodiment of the invention, as shown in fig. 5, a clamping groove of the filter screen 7 is designed in the inlet bellows 1, so that the filter screen is prevented from shaking when the fan works.
The assembly process of the embodiment case of the invention is as follows: the tapered roller bearing 14 and the baffle ring 15 are arranged on the output shaft of the motor 6, the centrifugal fan rotor 4 and the motor 6 are respectively arranged and connected on the inner side and the outer side of the volute 2, and the motor 6 is fastened through screwing; the rotor rectifying piece 5 is fixed at the position of a blade disc of the centrifugal fan rotor 4 through three groups of short screws; rubber gaskets 13 are arranged on two sides of the rectifying connecting piece 3, and are fixed with the volute 2 and the inlet bellows 1 through long screws 12; placing the filter screen 7 in a clamping groove designed by the inlet bellows 1; finally, the compressed air duct 8 is installed at the outlet of the volute 2, namely, the installation is completed. The air directly enters the centrifugal fan rotor 4 through the filter screen 7 after flowing into the bellows, wherein the centrifugal fan rotor is a multi-wing centrifugal fan rotor, so that complex flow passages caused by the general design of most ventilators with the rotor arranged in another bellows are avoided, and further, the loss is reduced.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (6)
1. The air duct structure of the ventilator is characterized by comprising an inlet air box (1), a volute (2) and a centrifugal fan rotor (4); the outlet end of the inlet bellows (1) is communicated with the volute (2), and a centrifugal fan rotor (4) is arranged in the volute (2); the centrifugal fan rotor (4) is driven to rotate through the motor (6); the inlet bellows (1), the rectifying connecting piece (3) and the volute (2) are connected together through a plurality of long screws (12); the rectifying connecting piece (3) is a hollow pipe, one end of the rectifying connecting piece extends into the volute (2), and the other end of the rectifying connecting piece is arranged between the inlet bellows (1) and the volute (2); the rectifying connecting piece (3) is an elastic element, and the rectifying connecting piece (3) extends into the volute (2) section to be in a tapered shape; the longitudinal section of the rectifying connecting piece (3) is of an inverted triangle structure; a rubber gasket (13) is arranged in a gap between the rectifying connecting piece (3) and the inlet bellows (1) and a gap between the rectifying connecting piece and the volute (2);
an air inlet (9) is formed in one side face of the inlet bellows (1), a filter screen (7) and an arc-shaped baffle (16) are arranged in the inlet bellows (1), the arc-shaped baffle (16) and the side face where the air inlet (9) is formed in a relative mode, and air enters through the air inlet (9) and then enters through the filter screen (7) after being changed in direction by the arc-shaped baffle (16).
2. The air duct structure of the ventilator according to claim 1, wherein the three filter screens (7) are arranged, and the transverse cross section of the pattern formed by the three filter screens (7) and the arc-shaped baffle plates (16) is of a quadrilateral-like structure.
3. The air duct structure of a ventilator according to claim 1, characterized in that the centrifugal fan rotor (4) is a multi-wing centrifugal fan rotor.
4. A ventilator's wind channel structure according to claim 3, characterized in that the centre of the centrifugal fan rotor (4) is provided with a fan rotor rectifying member (5), the longitudinal section of the fan rotor rectifying member (5) is of an inverted triangle structure, and the output shaft of the motor (6) is arranged on the fan rotor rectifying member (5).
5. The air duct structure of the ventilator according to claim 4, wherein the input end of the volute (2) is opposite to the fan rotor rectifying piece (5), and the output end is communicated with the compressed air duct (8).
6. The air duct structure of the ventilator according to claim 1, characterized in that a tapered roller bearing (14) is provided on the scroll casing (2), an output shaft of the motor (6) is supported by the tapered roller bearing (14), and a baffle ring (15) is provided on one side of the tapered roller bearing (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111345627.7A CN114165483B (en) | 2021-11-15 | 2021-11-15 | Air duct structure of ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111345627.7A CN114165483B (en) | 2021-11-15 | 2021-11-15 | Air duct structure of ventilator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114165483A CN114165483A (en) | 2022-03-11 |
| CN114165483B true CN114165483B (en) | 2024-03-19 |
Family
ID=80478965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111345627.7A Active CN114165483B (en) | 2021-11-15 | 2021-11-15 | Air duct structure of ventilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114165483B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2488921Y (en) * | 2001-05-23 | 2002-05-01 | 艾道寰 | Airflow type unginned cotton cleaning separator |
| CN201250801Y (en) * | 2008-09-18 | 2009-06-03 | 中国北车集团大同电力机车有限责任公司 | Centrifugal ventilator for engines |
| CN202707533U (en) * | 2012-06-29 | 2013-01-30 | 株洲联诚集团有限责任公司 | Centrifugal fan for wind driven generator |
| CN203144548U (en) * | 2012-08-20 | 2013-08-21 | 内蒙古一机集团北方实业有限公司 | Plating tank with ventilation, blast device |
| CN204664013U (en) * | 2015-05-29 | 2015-09-23 | 邹平县新丰电子机械设备厂 | Flashboard type blower fan filtering device |
| CN206647283U (en) * | 2017-03-04 | 2017-11-17 | 卓力电器集团有限公司 | A kind of DC fan system |
| CN208669659U (en) * | 2018-08-28 | 2019-03-29 | 湖南联诚轨道装备有限公司 | A kind of cooling fan with cutoff silencer EMU traction motor |
| CN111649011A (en) * | 2020-06-10 | 2020-09-11 | 安徽庐风风机有限公司 | Dustproof device of numerical control fan |
-
2021
- 2021-11-15 CN CN202111345627.7A patent/CN114165483B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2488921Y (en) * | 2001-05-23 | 2002-05-01 | 艾道寰 | Airflow type unginned cotton cleaning separator |
| CN201250801Y (en) * | 2008-09-18 | 2009-06-03 | 中国北车集团大同电力机车有限责任公司 | Centrifugal ventilator for engines |
| CN202707533U (en) * | 2012-06-29 | 2013-01-30 | 株洲联诚集团有限责任公司 | Centrifugal fan for wind driven generator |
| CN203144548U (en) * | 2012-08-20 | 2013-08-21 | 内蒙古一机集团北方实业有限公司 | Plating tank with ventilation, blast device |
| CN204664013U (en) * | 2015-05-29 | 2015-09-23 | 邹平县新丰电子机械设备厂 | Flashboard type blower fan filtering device |
| CN206647283U (en) * | 2017-03-04 | 2017-11-17 | 卓力电器集团有限公司 | A kind of DC fan system |
| CN208669659U (en) * | 2018-08-28 | 2019-03-29 | 湖南联诚轨道装备有限公司 | A kind of cooling fan with cutoff silencer EMU traction motor |
| CN111649011A (en) * | 2020-06-10 | 2020-09-11 | 安徽庐风风机有限公司 | Dustproof device of numerical control fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114165483A (en) | 2022-03-11 |
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