CN112401739A - Negative pressure adsorption system for dust collector - Google Patents
Negative pressure adsorption system for dust collector Download PDFInfo
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- CN112401739A CN112401739A CN202011198165.6A CN202011198165A CN112401739A CN 112401739 A CN112401739 A CN 112401739A CN 202011198165 A CN202011198165 A CN 202011198165A CN 112401739 A CN112401739 A CN 112401739A
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- air inlet
- turbine
- shell
- negative pressure
- air
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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
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
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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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- 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 provides a negative pressure adsorption system for a dust collector, belongs to the technical field of dust collectors, and solves the problem of poor adsorption effect in the prior art. The invention comprises a shell, wherein an air inlet and an air outlet are respectively arranged at two ends of the shell, an air inlet device is arranged at one end of the shell close to the air inlet, a turbine pressure reducing device is arranged at one end of the shell close to the air outlet, the air flow of the air inlet device can drive the turbine pressure reducing device to reduce pressure, an outer duct is arranged in the shell, an auxiliary exhaust device is arranged in the outer duct, and the auxiliary exhaust device can be driven to exhaust when the turbine pressure reducing device reduces pressure. According to the invention, the turbine pressure reducing device is arranged at one end close to the air outlet, the turbine pressure reducing device is driven to work by utilizing the air flow from the front, the air displacement at the air outlet is increased by the turbine pressure reducing device, so that the negative pressure at the air inlet is increased, the adsorption effect at the air inlet is finally improved, the power of the air inlet device is not required to be improved, and the side effect of high noise is avoided.
Description
Technical Field
The invention belongs to the technical field of dust collectors, and particularly relates to a negative pressure adsorption system for a dust collector.
Background
The dust collector mainly comprises three parts of dust generation, dust collection and dust filtration. The dust collector can remove dust and is mainly characterized in that an electric exhaust fan is arranged at the head of the dust collector. The rotating shaft of the exhaust fan is provided with an air impeller, after the rotation shaft is electrified, the exhaust fan can generate higher suction and pressure at higher rotating speed, air is discharged at high speed under the action of the suction and the pressure, air in the air suction part at the front end of the air fan continuously supplements the air in the air fan, so that negative pressure is generated inside the dust collector, negative pressure difference is formed between the negative pressure and the external atmospheric pressure, and air containing dust is sucked under the action of the negative pressure difference. The dust and other sundries sequentially pass through the carpet or the floor brush, the long connecting pipe, the bent pipe, the hose and the hose joint to enter the dust collecting device, the dust and other sundries are retained in the dust filtering bag, and the air is purified by the filter disc and then is discharged from the tail part of the machine body.
An important index for evaluating the performance of the dust collector in the market at present is the amount of air discharged per unit time under a certain condition by the motor power, and the amount of the discharged air is determined according to the size of negative pressure inside the dust collector caused by the air discharged from the motor inside the dust collector.
In order to reduce the internal pressure of the dust collector, increase the negative pressure and improve the adsorption effect, the prior art generally improves the power of a motor, but the weight and the noise of the dust collector are greatly increased, and the use experience of a user is greatly influenced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a negative pressure adsorption system with good adsorption effect for a dust collector.
The purpose of the invention can be realized by the following technical scheme: the utility model provides a negative pressure adsorption system for dust catcher, includes the casing, the casing both ends be air inlet and gas outlet respectively, the casing in be close to the one end of air inlet and be equipped with air inlet unit, the casing in be close to the one end of gas outlet and be equipped with turbine pressure relief device, air inlet unit's air current can drive turbine pressure relief device and decompress, the casing in be equipped with outer duct, outer duct in be equipped with supplementary exhaust apparatus, turbine pressure relief device can drive supplementary exhaust apparatus when decompressing and exhaust.
Air inlet unit is used for admitting air from the air inlet, through setting up turbine pressure relief device in the one end that is close to the gas outlet, the utilization comes the work of air current drive turbine pressure relief device of place ahead air inlet unit, increase the discharge of gas outlet department through turbine pressure relief device, make air inlet department negative pressure increase, finally improve the adsorption efficiency of air inlet department, need not to realize through the power that improves air inlet unit, consequently, can not produce the big side effect of noise, through set up the outer duct with the air inlet communicating in the casing, set up the further increase discharge of supplementary exhaust apparatus in the outer duct, and turbine pressure relief device can drive supplementary exhaust apparatus exhaust and has improved energy utilization once more.
In the above negative pressure adsorption system for a vacuum cleaner, the turbine pressure reducing device includes a rotating shaft disposed in the casing and a turbine disposed on the rotating shaft, the auxiliary exhaust device includes an impeller capable of rotating synchronously with the rotating shaft, and the impeller is located in the bypass.
The pivot cooperation turbine rotates, and the turbine rotates and is used for the exhaust, and the impeller can rotate with the pivot is synchronous, rotates through turbine and pivot and drives the impeller rotation, and the impeller rotates and can assist the exhaust, through setting up the impeller in outer duct, and the air current that its rotation caused flows and can not rotate the air current that causes with the turbine and flow and interfere mutually.
In foretell negative pressure adsorption system for dust catcher, the pivot tip be equipped with rather than rotate and be connected and be the fixed axle with the axle center, the fixed axle pass the impeller and be connected with the casing lateral part, fixed axle and casing between be connected through fixation nut, fixation nut on be equipped with and rotate connecting portion, impeller wheel center one side cover establish in the pivot rather than rotate and be connected, the opposite side is established rather than rotate and is connected with rotating connecting portion with the cover.
The fixed shaft is connected with the shell, the rotating shaft is rotatably connected with the fixed shaft, the rotating shaft can rotate in the shell, the fixed nut is used for connecting the fixed shaft with the shell, and the rotating connecting portion of the fixed nut can be used for rotating the impeller.
In the above negative pressure adsorption system for a vacuum cleaner, the two sets of the outer ducts are respectively located at two sides of the housing, and the two sets of the auxiliary exhaust devices are respectively located at two sides of the turbine.
Two sets of outer ducts and auxiliary exhaust devices are arranged on two sides of the turbine, so that space and kinetic energy are reasonably utilized, and the exhaust volume is increased.
In the above negative pressure adsorption system for a vacuum cleaner, the housing is further provided with an auxiliary exhaust port, one end of the outer duct is communicated with the air inlet, and the other end of the outer duct is communicated with the auxiliary exhaust port. The auxiliary exhaust port is arranged to assist in exhausting, so that gas in the outer duct is exhausted, and the exhaust volume is increased.
In the above negative pressure adsorption system for a vacuum cleaner, the auxiliary exhaust port is disposed on a side of the housing close to the air outlet.
In the negative pressure adsorption system for the dust collector, the air inlet device is arranged in the shell, one side of the air inlet device, which is close to the air outlet, is provided with the inner duct, and the inner duct penetrates through the air inlet device and the end part of the shell.
The inner duct is a passage for the air flow sucked by the air inlet device from the air inlet to flow to the air outlet for discharge, the space of the inner duct is larger relative to the outer duct through the turbine pressure reducing device, and the main air inlet and exhaust functions are achieved.
In the above negative pressure adsorption system for a vacuum cleaner, the air inlet device includes a fan disposed in the housing, an air inlet end of the fan is communicated with the air inlet, and an air outlet end of the fan is communicated with the inner duct.
The fan is arranged to suck gas from the gas inlet and exhaust the gas to the inner duct, so that the turbine pressure reducing device can rotate and exhaust the gas.
In the above negative pressure adsorption system for a vacuum cleaner, the rotating shaft is further provided with a bearing, and the bearing is provided with a separating wheel capable of separating the turbine from the outer duct.
The bearing is used for supporting the separating wheel and bearing axial load, and the separating wheel is arranged to separate the turbine from the outer duct so as to prevent the turbine from being interfered.
Compared with the prior art, the turbine pressure reducing device is arranged at one end close to the air outlet, the turbine pressure reducing device is driven to work by utilizing the airflow from the front air inlet device, the exhaust volume at the air outlet is increased by the turbine pressure reducing device, so that the negative pressure at the air inlet is increased, the adsorption effect at the air inlet is finally improved, the power of the air inlet device is not required to be improved, the side effect of high noise is avoided, the exhaust volume is further increased by arranging the auxiliary exhaust device in the outer duct, and the energy utilization rate is improved by the turbine pressure reducing device driving the auxiliary exhaust device to exhaust; by arranging the impeller in the outer duct, the airflow caused by the rotation of the impeller does not interfere with the airflow caused by the rotation of the turbine; the auxiliary exhaust port is arranged to assist in exhausting, so that gas in the outer duct is exhausted, and the exhaust volume is increased.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a top view of the middle of the hidden housing of the present invention;
FIG. 3 is a top view of the hidden housing middle and side portions of the present invention;
FIG. 4 is a schematic view of a partial perspective structure of the present invention;
in the figure, 1, a housing; 2. an air inlet; 3. an air outlet; 4. an air intake device; 41. a fan; 5. a turbine pressure reduction device; 51. a turbine; 52. a rotating shaft; 6. an outer duct; 7. an auxiliary exhaust device; 71. an impeller; 8. a fixed shaft; 81. fixing a nut; 811. a rotation connecting part; 9. an auxiliary exhaust port; 10. an inner duct; 11. a bearing; 12. and (4) separating wheels.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example 1
As shown in fig. 1-4, the present invention includes a housing 1, an air inlet 2 and an air outlet 3 are respectively disposed at two ends of the housing 1, an air inlet device 4 is disposed at one end of the housing 1 close to the air inlet 2, a turbine pressure reducing device 5 is disposed at one end of the housing 1 close to the air outlet 3, an air flow of the air inlet device 4 can drive the turbine pressure reducing device 5 to reduce pressure, an outer duct 6 is disposed in the housing 1, an auxiliary exhaust device 7 is disposed in the outer duct 6, and the turbine pressure reducing device 5 can drive the auxiliary exhaust device 7 to exhaust air when rotating.
Air inlet unit 4 is used for admitting air from air inlet 2, one end through being close to gas outlet 3 sets up turbine pressure relief device 5, the air current that utilizes to come from place ahead air inlet unit 4 drives the work of turbine pressure relief device 5, increase the discharge capacity of 3 departments of gas outlet through turbine pressure relief device 5, make 2 departments of air inlet negative pressure increase, finally improve the adsorption efficiency of 2 departments of air inlet, need not to realize through the power that improves air inlet unit 4, consequently, can not produce the big side effect of noise, through set up outer duct 6 in casing 1, set up supplementary exhaust apparatus 7 in the outer duct 6 and further increase the discharge capacity, and turbine pressure relief device 5 can drive supplementary exhaust apparatus 7 and exhaust and has improved energy utilization once more.
The turbine pressure reducing device 5 comprises a rotating shaft 52 arranged in the shell 1 and a turbine 51 arranged on the rotating shaft 52, the auxiliary exhaust device 7 comprises an impeller 71 capable of rotating synchronously with the rotating shaft 52, and the impeller 71 is positioned in the bypass 6.
The rotating shaft 52 is matched with the turbine 51 to rotate, the turbine 51 rotates for exhausting, the impeller 71 can rotate synchronously with the rotating shaft 52, the impeller 71 is driven to rotate by the rotation of the turbine 51 and the rotating shaft 52, the exhaust can be assisted by the rotation of the impeller 71, and the air flow caused by the rotation of the impeller 71 cannot interfere with the air flow caused by the rotation of the turbine 51 by arranging the impeller 71 in the bypass 6.
The tip of pivot 52 be equipped with rather than rotate and be connected and be the fixed axle 8 with the axle center, fixed axle 8 pass impeller 71 and be connected with casing 1 lateral part, fixed axle 8 and casing 1 between be connected through fixation nut 81, fixation nut 81 on be equipped with and rotate connecting portion 811, impeller 71 wheel center one side cover establish and be connected rather than rotating in pivot 52, the opposite side with overlap establish and rotate rather than rotating and be connected in rotating connecting portion 811.
The fixed shaft 8 is connected with the shell 1, the rotating shaft 52 is rotatably connected with the fixed shaft 8, the rotating shaft 52 can rotate in the shell 1, the fixed nut 81 is used for connecting the fixed shaft 8 with the shell 1, and the rotating connecting part 811 can be used for rotating the impeller 71.
The two sets of the outer ducts 6 are respectively positioned at two sides of the shell 1, and the two sets of the auxiliary exhaust devices 7 are respectively positioned at two sides of the turbine 51. Two groups of outer ducts 6 and auxiliary exhaust devices 7 are arranged on two sides of the turbine 51, so that space and kinetic energy are reasonably utilized, and the exhaust volume is increased.
The shell 1 is also provided with an auxiliary exhaust port 9, one end of the outer duct 6 is communicated with the air inlet 2, and the other end is communicated with the auxiliary exhaust port 9. The auxiliary exhaust port 9 can assist in exhaust, exhaust the gas in the bypass 6, and increase the exhaust amount. The auxiliary exhaust port 9 is arranged on one side of the shell 1 close to the air outlet 3.
The air inlet device 4 is arranged in the shell 1, an inner duct 10 is arranged on one side of the air inlet device 4 close to the air outlet 3, and the inner duct 10 penetrates through the air inlet device 4 and the end part of the shell 1. The inner duct 10 is a passage through which the air flow sucked from the air inlet 2 by the air inlet device 4 flows to the air outlet 3 and is discharged, the space of the inner duct 10 is larger than that of the outer duct 6 through the turbine pressure reducing device 5, and the inner duct 10 plays a main air inlet and exhaust role.
The air inlet device 4 comprises a fan 41 arranged in the shell 1, the air inlet end of the fan 41 is communicated with the air inlet 2, and the air outlet end is communicated with the inner duct 10. The gas is sucked in from the gas inlet 2 by the fan 41 and discharged to the inner duct 10 for the turbine pressure reducing device 5 to rotate and discharge.
The rotating shaft 52 is further provided with a bearing 11, and the bearing 11 is provided with a separating wheel 12 capable of separating the turbine 51 from the outer duct 6. The bearing 11 is used for supporting the diaphragm wheel 12 and bearing axial load, and the turbine 51 is separated from the bypass 6 by the diaphragm wheel 12 to prevent interference.
The working principle of the embodiment is as follows: the fan 41 is started, the fan 41 rotates to introduce airflow into the air inlet 2, the airflow entering the air inlet 2 flows to the inner duct 10 in the center of the shell 1 and the outer ducts 6 on two sides of the inner duct 10 respectively, the airflow entering the inner duct 10 drives the turbine 51 at the rear end of the fan 41 to rotate and then is discharged from the air outlet 3 through the turbine 51, meanwhile, the turbine 51 and the rotating shaft 52 are fixed on the rotating shaft 52, the turbine 51 and the rotating shaft 52 rotate to drive the impeller 71 to rotate synchronously, the impeller 71 is located in the outer duct 6, the airflow entering the outer duct 6 is discharged to the auxiliary exhaust port 9 through the impeller 71, and through increasing the exhaust amount, the negative pressure inside the shell 1 always enables the air suction amount in the air inlet 2 to be increased in unit time until the dust collector is closed.
According to the invention, the turbine pressure reducing device 5 is arranged at one end close to the air outlet 3, the turbine pressure reducing device 5 is driven to work by utilizing the airflow from the front air inlet device 4, the exhaust volume at the air outlet 3 is increased by the turbine pressure reducing device 5, so that the negative pressure at the air inlet 2 is increased, the adsorption effect at the air inlet 2 is finally improved, and the realization of improving the power of the air inlet device 4 is not needed, so that the side effect of high noise is avoided, the exhaust volume is further increased by arranging the auxiliary exhaust device 7 in the bypass 6, and the turbine pressure reducing device 5 can drive the auxiliary exhaust device 7 to exhaust, so that the energy utilization rate is improved again; by disposing the impeller 71 in the bypass 6, the flow of the air stream caused by the rotation thereof does not interfere with the flow of the air stream caused by the rotation of the turbine 51; the auxiliary exhaust port 9 can assist in exhaust, exhaust the gas in the bypass 6, and increase the exhaust amount.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. The utility model provides a negative pressure adsorption system for dust catcher, includes casing (1), casing (1) both ends be air inlet (2) and gas outlet (3) respectively, casing (1) in be close to the one end of air inlet (2) and be equipped with air inlet unit (4), its characterized in that: the turbine pressure reducing device is characterized in that a turbine pressure reducing device (5) is arranged at one end, close to the air outlet (3), in the shell (1), air flow of the air inlet device (4) can drive the turbine pressure reducing device (5) to reduce pressure, an outer duct (6) is arranged in the shell (1), an auxiliary exhaust device (7) is arranged in the outer duct (6), and the auxiliary exhaust device (7) can be driven to exhaust air when the turbine pressure reducing device (5) reduces pressure.
2. The negative pressure adsorption system for a vacuum cleaner as claimed in claim 1, wherein: the turbine pressure reducing device (5) comprises a rotating shaft (52) arranged in the shell (1) and a turbine (51) arranged on the rotating shaft (52), the auxiliary exhaust device (7) comprises an impeller (71) capable of rotating synchronously with the rotating shaft (52), and the impeller (71) is positioned in the bypass (6).
3. The negative pressure adsorption system for a vacuum cleaner as claimed in claim 2, wherein: pivot (52) tip be equipped with rather than rotate and be connected and be fixed axle (8) with the axle center, fixed axle (8) pass impeller (71) and be connected with casing (1) lateral part, fixed axle (8) and casing (1) between be connected through fixation nut (81), fixation nut (81) on be equipped with and rotate connecting portion (811), impeller (71) wheel center one side cover establish rather than rotate and be connected on pivot (52), the opposite side with establish rather than rotate and be connected on rotating connecting portion (811).
4. A negative pressure suction system for a vacuum cleaner according to claim 1, 2 or 3, wherein: the two sets of the outer ducts (6) are respectively positioned at two sides of the shell (1), and the two sets of the auxiliary exhaust devices (7) are respectively positioned at two sides of the turbine (51).
5. A negative pressure suction system for a vacuum cleaner according to claim 1, 2 or 3, wherein: the shell (1) is also provided with an auxiliary exhaust port (9), one end of the outer duct (6) is communicated with the air inlet (2), and the other end of the outer duct is communicated with the auxiliary exhaust port (9).
6. The negative pressure adsorption system for a vacuum cleaner as claimed in claim 5, wherein: the auxiliary exhaust port (9) is arranged on one side of the shell (1) close to the air outlet (3).
7. A negative pressure suction system for a vacuum cleaner according to claim 1, 2 or 3, wherein: the air inlet device (4) is arranged in the shell (1), one side, close to the air outlet (3), of the air inlet device (4) is provided with an inner duct (10), and the inner duct (10) penetrates through the end portions of the air inlet device (4) and the shell (1).
8. The negative pressure adsorption system for a vacuum cleaner as claimed in claim 7, wherein: the air inlet device (4) comprises a fan (41) arranged in the shell (1), the air inlet end of the fan (41) is communicated with the air inlet (2), and the air outlet end is communicated with the inner duct (10).
9. The negative pressure adsorption system for a vacuum cleaner as claimed in claim 2 or 3, wherein: the rotating shaft (52) is also provided with a bearing (11), and the bearing (11) is provided with a separating wheel (12) which can separate the turbine (51) from the outer duct (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011198165.6A CN112401739B (en) | 2020-10-31 | 2020-10-31 | Negative pressure adsorption system for dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011198165.6A CN112401739B (en) | 2020-10-31 | 2020-10-31 | Negative pressure adsorption system for dust collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112401739A true CN112401739A (en) | 2021-02-26 |
| CN112401739B CN112401739B (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011198165.6A Active CN112401739B (en) | 2020-10-31 | 2020-10-31 | Negative pressure adsorption system for dust collector |
Country Status (1)
| Country | Link |
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| CN (1) | CN112401739B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03297431A (en) * | 1990-04-18 | 1991-12-27 | Hitachi Ltd | Vacuum cleaner |
| CN2818789Y (en) * | 2005-06-16 | 2006-09-20 | 李诗芳 | Turbine pressurizer with nozzle |
| CN107355314A (en) * | 2017-08-24 | 2017-11-17 | 刘雨棣 | It is segmented tandem electric rotor fanjet and its control method |
| CN206668592U (en) * | 2017-04-18 | 2017-11-24 | 苏州普发机电有限公司 | A kind of blower fan with booster body |
| CN207315689U (en) * | 2017-10-19 | 2018-05-04 | 美的集团股份有限公司 | Electric fan and there is its dust catcher |
| CN207363955U (en) * | 2017-09-05 | 2018-05-15 | 江苏正驰机电有限公司 | Turbocharger air compressor shell |
| CN110575095A (en) * | 2019-10-08 | 2019-12-17 | 珠海格力电器股份有限公司 | Silencer assembly and dust collector |
| CN210554683U (en) * | 2019-06-23 | 2020-05-19 | 南京沿途汽车用品有限公司 | Multi-blade handheld wireless dust collector |
-
2020
- 2020-10-31 CN CN202011198165.6A patent/CN112401739B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03297431A (en) * | 1990-04-18 | 1991-12-27 | Hitachi Ltd | Vacuum cleaner |
| CN2818789Y (en) * | 2005-06-16 | 2006-09-20 | 李诗芳 | Turbine pressurizer with nozzle |
| CN206668592U (en) * | 2017-04-18 | 2017-11-24 | 苏州普发机电有限公司 | A kind of blower fan with booster body |
| CN107355314A (en) * | 2017-08-24 | 2017-11-17 | 刘雨棣 | It is segmented tandem electric rotor fanjet and its control method |
| CN207363955U (en) * | 2017-09-05 | 2018-05-15 | 江苏正驰机电有限公司 | Turbocharger air compressor shell |
| CN207315689U (en) * | 2017-10-19 | 2018-05-04 | 美的集团股份有限公司 | Electric fan and there is its dust catcher |
| CN210554683U (en) * | 2019-06-23 | 2020-05-19 | 南京沿途汽车用品有限公司 | Multi-blade handheld wireless dust collector |
| CN110575095A (en) * | 2019-10-08 | 2019-12-17 | 珠海格力电器股份有限公司 | Silencer assembly and dust collector |
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| Publication number | Publication date |
|---|---|
| CN112401739B (en) | 2022-07-05 |
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