CN111622962A - But high-efficient centrifugal induced fan of blowback - Google Patents

But high-efficient centrifugal induced fan of blowback Download PDF

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Publication number
CN111622962A
CN111622962A CN202010578141.7A CN202010578141A CN111622962A CN 111622962 A CN111622962 A CN 111622962A CN 202010578141 A CN202010578141 A CN 202010578141A CN 111622962 A CN111622962 A CN 111622962A
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CN
China
Prior art keywords
fan
air inlet
blowing
air
air outlet
Prior art date
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Pending
Application number
CN202010578141.7A
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Chinese (zh)
Inventor
戴美军
黄岳钬
罗建平
王力
施郭洋
王炜
钟金龙
王洪厅
高才淼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jindun Blower Fan Equipment Co ltd
Zhejiang Jindun Fans Holding Co ltd
Original Assignee
Zhejiang Jindun Blower Fan Equipment Co ltd
Zhejiang Jindun Fans Holding Co ltd
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Publication date
Application filed by Zhejiang Jindun Blower Fan Equipment Co ltd, Zhejiang Jindun Fans Holding Co ltd filed Critical Zhejiang Jindun Blower Fan Equipment Co ltd
Priority to CN202010578141.7A priority Critical patent/CN111622962A/en
Publication of CN111622962A publication Critical patent/CN111622962A/en
Pending legal-status Critical Current

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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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • 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
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/003—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by throttling
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • 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
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/462—Fluid-guiding means, e.g. diffusers adjustable 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
    • F04D29/66—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
    • 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
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Geometry (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a reverse-blowing automatic dedusting high-efficiency centrifugal induced fan which comprises a fan shell, wherein an air inlet and an air outlet are respectively arranged at two ends of the fan shell, a filter, a side air inlet channel, a blowing device and a volute are sequentially arranged along the direction from the air inlet to the air outlet, a reverse-blowing reserved air port is arranged at the bottom of the fan shell, a fan flow channel switching device is arranged between the side air inlet channel and the reverse-blowing reserved air port, and a valve device capable of adjusting the opening and closing of the air outlet is arranged at the air outlet. The invention changes the direction of the airflow by changing the direction of the flow passage in the fan, adopts the dust cleaning mode of back blowing dust removal, and has the advantages of good dust cleaning effect, simple structure, no need of adding a special small cleaning fan, convenient control, small maintenance workload, safe and reliable operation and the like. The gas is disinfected by the disinfection device, so that the generation and the propagation of germs are effectively prevented.

Description

But high-efficient centrifugal induced fan of blowback
Technical Field
The invention relates to the technical field of fan equipment, in particular to a back-blowing efficient centrifugal induction fan.
Background
The induction fan utilizes the characteristic of high-speed jet flow in aerodynamics, and utilizes the jetted high-speed airflow with high kinetic energy to induce to mix a large amount of surrounding air and bring the air to a specific target direction. The ventilation equipment can guide outdoor fresh air or treated air to be delivered to a required area under the condition of no air pipe, and achieves efficient and economical ventilation effect. The large-air-volume ventilation system is mainly used for large-air-volume ventilation of storehouses such as underground parking garages, sports commercial venues, large-scale factory buildings, subway vehicle section application storehouses and combined overhaul storehouses, can aim at different ventilation demands or smoke exhaust requirements by adjusting the operation mode of an induction fan system without adopting ventilation pipelines, can timely change the organization path of air flow by utilizing an intelligent control system, can realize ventilation without dead angles in the whole space, and meets the requirements of ventilation and fire control smoke exhaust.
In order to prevent the service life of the induction fan equipment from being influenced by severe environment, the induction fan used in engineering generally requires an automatic filtering and dedusting function, a filter is arranged at an air inlet of the equipment to prevent fine particles from entering, and parts such as an impeller and the like are prevented from hanging dust; in addition, in order to reduce the maintenance cost of the induced fan equipment, the induced fan needs to have a timing dust removal function, so that dust on a filter and the equipment is prevented from being accumulated, and the equipment is prevented from being influenced.
The automatic dust removal function of axial flow type induced fans in the prior engineering generally adopts a back-blowing dust removal mode, and the axial flow type induced fans can realize the change of the direction of air flow by changing the positive and negative rotation of fan impellers, so that the automatic back-blowing dust removal purpose of a filter device is achieved.
However, in principle, the radial impeller cannot realize the change of the airflow direction due to the forward and reverse rotation of the impeller of the fan regardless of the forward impeller and the backward impeller of the centrifugal induction fan. Especially, centrifugal induced fans generally adopt backward impellers, and then the backward impellers are easy to overload once being reversed, so that the aim of back-blowing and dust removal can not be achieved by only converting the directions of the impellers.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a reverse-blowing high-efficiency centrifugal inducing fan, which changes the direction of airflow by changing the direction of a flow passage in the fan, thereby realizing the purpose of reverse-blowing automatic dust removal.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a but high-efficient centrifugal induced fan of automatic dust removal of blowback, includes the fan shell, the both ends of fan shell are provided with air intake and air outlet respectively, follow the air intake to the air outlet direction department in proper order installs filter, side inlet air passageway, blast apparatus, spiral case, the bottom of fan shell is provided with the blowback and reserves the wind gap, side inlet air passageway with be provided with fan runner auto-change over device between the wind gap is reserved in the blowback, air outlet department is provided with the adjustable valve gear of air outlet switching.
When the induced fan needs to perform reverse blowing and automatic dust removal, only the flow channel switching device of the fan needs to be controlled to open a reverse blowing reserved air port on the fan shell, an air inlet pipeline of the original fan is sealed, a side air inlet channel is opened, and the valve device is controlled to seal an air outlet pipeline of the original fan, so that the flow channel direction conversion inside the fan is realized, and a reverse blowing mode is entered. And then the fan is started, the rotating impeller drives airflow to enter the volute from the back-blowing reserved air port of the fan shell, the airflow enters the volute, and finally the airflow is led to the filter device through the side air inlet channel communicated with the back-blowing reserved air port through the volute, so that the aim of automatically removing dust in the filter through back blowing is fulfilled.
Further, the side air inlet channel comprises an upper air inlet and a lower air inlet, the fan flow channel switching device comprises a first sliding baffle matched with the upper air inlet/the lower air inlet and a second sliding baffle matched with the reverse blowing reserved air inlet, and the first sliding baffle is connected with the second sliding baffle through a connecting rod.
When the induced fan works normally, the fan runs in the forward direction and is in a state that the lower air inlet is opened, the upper air inlet and the bottom reverse blowing reserved air inlet are closed, and airflow flows through the lower air inlet through the air inlet of the fan and flows to the air outlet to form a forward air inlet pipeline; when the back blowing dust removal is needed, the first sliding baffle is controlled to slide downwards, meanwhile, the sliding baffle moves towards the second direction, the lower air inlet is closed, the upper air inlet and the bottom back blowing reserved air inlet are opened (meanwhile, a valve device at the air outlet needs to be closed), the forward air inlet pipeline of the original fan is closed, air flow enters from the back blowing reserved air inlet and flows to the filter device through the upper air inlet, and the purpose of automatically removing filter dust through back blowing is achieved. The first sliding baffle and the second sliding baffle are connected through a connecting rod, the direction of a flow channel inside the fan is changed, the upper air inlet and the reverse blowing reserved air inlet are synchronously closed and opened, and the control is convenient and the operation is simple.
Furthermore, the fan flow channel switching device adopts a centralized control mode, and the movement of the first sliding baffle and the second sliding baffle is controlled by an electric actuator. And the electric actuator controls the up-down movement of the first sliding baffle and the back-forth movement of the second sliding baffle through the connecting rod to control the opening and closing of the back-blowing reserved air inlet and the upper air inlet and control the opening and closing of the forward air inlet pipeline of the original fan by adopting a centralized control mode, so that the direction switching of an internal flow channel at the air inlet of the fan is realized. The device has the characteristics of simple structure, flexible opening and closing of the pipeline, high synchronization rate and the like.
Further, blast apparatus is including installing fan wheel and the motor in the fan shell, the motor adopts the high-efficient inverter motor of EC integral type. The motor is a direct-current brushless maintenance-free motor with an intelligent control module, is provided with various signal input interfaces, and has the characteristics of compact structure, high speed control efficiency, high intelligence, high energy conservation, high efficiency, long service life, small vibration, low noise, continuous and uninterrupted operation and the like.
Further, a current collector is installed in the fan shell, the current collector is arc-shaped and is formed by spinning through a die, and the surface of the current collector is smooth and streamline. The turbulence can be reduced, and the uniformity of an air inlet speed field is ensured, so that the efficiency of the induction fan is improved, and the noise of the induction fan is reduced.
Furthermore, the fan impeller adopts a high-efficiency centrifugal fan impeller with a large flow coefficient, a high specific speed and a low pressure coefficient, so that the turning angle of airflow can be greatly reduced, the pneumatic nozzle effect is reduced, the flow loss is reduced, the ventilation volume of the system is improved, the energy utilization efficiency of the system operation is favorably improved, and the requirement of a large-air-volume system is met.
Further, a nozzle device is installed at the air outlet, and a valve device is installed at the nozzle device.
Further, the nozzle device adopts an electric double-layer adjustable guide vane structure and is provided with an inner layer guide vane electric air valve device and an outer layer guide vane electric air valve device. The inner layer guide vane electric air valve device can be electrically adjusted in the vertical direction, and the adjusting angle is 45-135 degrees; the outer layer guide vane electric air valve device can be adjusted in the horizontal direction, and the adjusting angle is 0-90 degrees. The inner layer guide vane electric air valve device can be electrically adjusted in the vertical direction, and the adjusting angle is 45-135 degrees, so that the air quantity is induced to a wider area; the outer layer guide vane electric air valve device can be adjusted in the horizontal direction, and the adjusting angle is 0-90 degrees, so that the air quantity is induced to the position close to the ground; the design can enable the range, the coverage area and the induced air quantity of the fan to achieve the optimal combination.
The opening angles of the inner layer guide vane electric air valve device and the outer layer guide vane electric air valve device can be regulated and controlled in a stepless mode, so that a proper control mode can be selected according to specific use working conditions; the air valve device can also be set within a certain angle according to the use working condition to carry out automatic swinging parametric control. For example: the outer layer guide vane electric air valve device can be arranged under the parameter of 30 degrees +/-15 degrees to perform linear automatic air sweeping and swinging.
Further, the fan shell is of a flat and long structure.
Further, the fan shell is internally provided with a sterilizing device which can adopt modes such as an ultraviolet lamp and the like, and can automatically sterilize gas when the fan runs, thereby effectively preventing the occurrence and the propagation of germs.
In conclusion, the impeller of the high-efficiency centrifugal fan is adopted, so that the air flow range is improved, and the induced air quantity is increased. The air outlet direction and the air outlet quantity can be adjusted by adopting the nozzle device to intelligently control, and the induction effects of the fan such as the ejection distance, the coverage area and the induction air quantity are ensured. The invention has high efficiency, large coverage area and small occupied space for equipment installation; the filter is adopted, so that dust in the air can be effectively filtered and adsorbed, fine particles are prevented from entering, and parts such as the impeller and the like are prevented from being dusted; the direction of the airflow is changed by changing the direction of a flow passage in the fan, the counter-wind efficiency reaches more than 80% of the normal running air volume, the dust on the filter is automatically removed by back-blowing, the dust on the filter and equipment is prevented from being accumulated, and the influence of the accumulated dust on the equipment performance is eliminated.
The invention adopts the dust cleaning mode of back blowing dust removal, and has the advantages of good dust cleaning effect, simple structure, no need of adding a special small cleaning fan, convenient control, small maintenance workload, safe and reliable operation and the like. The gas is disinfected by the disinfection device, so that the generation and the propagation of germs are effectively prevented.
Drawings
FIG. 1 is a schematic view of the flow path in the forward direction of the present invention;
FIG. 2 is a schematic view showing the direction of flow channels during the back-blowing automatic dust-removing operation of the present invention.
Description of the labeling: 1. a fan housing; 2. a filter; 3. a fan flow channel switching device; 4. a side air inlet channel; 5. a current collector; 6. A fan impeller; 7. a motor; 8. a volute; 9. a forward air intake conduit; 10. back blowing the reserved air port; 11. a sterilizing device; 12. a nozzle device; 13. the inner layer guide vane electric air valve device; 14. an outer layer guide vane electric air valve device; 15. a lower air inlet; 16. an upper inlet; 17. a first baffle plate; 18. a second baffle plate; 19. a connecting rod.
Detailed Description
The embodiment of the centrifugal induced blower capable of back-blowing and high efficiency of the present invention will be further described with reference to fig. 1 to 2.
The utility model provides a but high-efficient centrifugal induced fan of automatic dust removal of blowback, includes fan shell 1, the both ends of fan shell 1 are provided with air intake and air outlet respectively, follow the air intake to the air outlet direction department in proper order installs filter 2, side inlet air duct 4, blast apparatus, spiral case 8, the bottom of fan shell 1 is provided with blowback and reserves wind gap 10, side inlet air duct 4 with be provided with fan runner auto-change over device 3 between the wind gap 10 is reserved in the blowback, air outlet department is provided with the adjustable valve means of air outlet switching.
When the induced fan needs to perform back-blowing automatic dust removal, only the fan flow channel switching device 3 needs to be controlled to open the back-blowing reserved air port 10 on the fan shell 1, the original fan air inlet pipeline is sealed, the side air inlet channel 4 is opened, the valve device is controlled to seal the original fan air outlet pipeline, the flow channel direction conversion inside the fan is achieved, and the back-blowing mode is entered. Then the blowing device is started, air flow is rotationally driven to blow back the reserved air port 10 from the fan shell 1 to enter the volute 8, and finally the air flow is led to the filter 2 device through the side air inlet channel 4 communicated with the reverse blowing reserved air port 10 through the volute 8, so that the purpose of automatically removing dust from the filter 2 through reverse blowing is achieved.
Preferably, in this embodiment, the side air inlet channel 4 includes an upper air inlet 16 and a lower air inlet 15, the blower flow channel switching device 3 includes a first sliding baffle 17 matched with the upper air inlet 16/the lower air inlet 15 and a second sliding baffle 18 matched with the blowback reserved air inlet 10, and the first sliding baffle 17 is connected with the second sliding baffle 18 through a connecting rod 19.
When the induced fan works normally, the fan runs in the forward direction and is in a state that the lower air inlet 15 is opened and the upper air inlet 16 and the bottom back-blowing reserved air inlet 10 are closed, and airflow flows through the lower air inlet 15 through the air inlet of the fan and flows to the air outlet to form a forward air inlet pipeline 9; when the back blowing dust removal is needed, the first sliding baffle 17 is controlled to slide downwards, meanwhile, the second sliding baffle 18 moves towards the second direction, the lower air inlet 15 is closed, the upper air inlet 16 and the bottom back blowing reserved air inlet 10 are opened (meanwhile, a valve device at the air outlet needs to be closed), the forward air inlet pipeline 9 of the original fan is closed, air flow enters from the back blowing reserved air inlet 10 and flows to the filter 2 device through the upper air inlet 16, and the purpose of automatically removing dust in the filter 2 through back blowing is achieved. The first sliding baffle 17 and the second sliding baffle 18 are connected through a connecting rod 19 to realize the direction conversion of the flow channel in the fan, so that the upper air inlet 16 and the reverse blowing reserved air inlet 10 are synchronously closed and opened, the control is convenient, and the operation is simple.
In this embodiment, preferably, the blower flow channel switching device 3 adopts a centralized control mode, and the electric actuator controls the movement of the first sliding baffle 17 and the second sliding baffle 18. By adopting a centralized control mode, the electric actuator controls the up-and-down movement of the first sliding baffle 17 and the back-and-forth movement of the second sliding baffle 18 through the connecting rod 19 to control the opening and closing of the back-blowing reserved air inlet 10 and the upper air inlet 16 and the opening and closing of the original forward air inlet pipeline 9 of the fan, so that the direction switching of an internal flow channel at the air inlet of the fan is realized. The device has the characteristics of simple structure, flexible opening and closing of the pipeline, high synchronization rate and the like.
Preferably, in this embodiment, the blowing device includes a fan impeller 6 and a motor 7 installed in the fan housing 1, and the motor 7 is an EC integrated high-efficiency variable frequency motor 7. The motor 7 is a direct-current brushless maintenance-free motor 7 with an intelligent control module, is provided with various signal input interfaces, and has the characteristics of compact structure, high speed control efficiency, high intelligence, high energy conservation, high efficiency, long service life, small vibration, low noise, continuous uninterrupted operation and the like.
In this embodiment, preferably, a current collector 5 is installed in the fan housing 1, the current collector 5 is arc-shaped, is formed by spinning through a die, and has a smooth and streamlined surface. The turbulence can be reduced, and the uniformity of an air inlet speed field is ensured, so that the efficiency of the induction fan is improved, and the noise of the induction fan is reduced.
In the preferred embodiment, the fan impeller 6 adopts the high-efficiency centrifugal fan impeller 6 with a large flow coefficient, a high specific speed and a low pressure coefficient, so that the turning angle of the air flow can be greatly reduced, the pneumatic nozzle effect is reduced, the flow loss is reduced, the ventilation volume of the system is improved, the energy utilization efficiency of the system operation is favorably improved, and the requirement of a large-air-volume system is met.
In this embodiment, it is preferable that the air outlet is provided with a nozzle device 12, and the valve device is provided at the nozzle device 12.
In this embodiment, the nozzle device 12 is preferably an electric double-layer adjustable guide vane structure, and is provided with an inner layer guide vane electric air valve device 13 and an outer layer guide vane electric air valve device 14. The inner layer guide vane electric air valve device 13 can be electrically adjusted in the vertical direction, and the adjusting angle is 45-135 degrees; the outer layer guide vane electric air valve device 14 can be adjusted in the horizontal direction, and the adjusting angle is 0-90 degrees. The inner layer guide vane electric air valve device 13 can be electrically adjusted in the vertical direction, and the adjusting angle is 45-135 degrees, so that the air quantity is induced to a wider area; the outer layer guide vane electric air valve device 14 can be adjusted in the horizontal direction, and the adjusting angle is 0-90 degrees, so that the air quantity is induced to the position close to the ground; the design can enable the range, the coverage area and the induced air quantity of the fan to achieve the optimal combination.
The opening angles of the inner layer guide vane electric air valve device 13 and the outer layer guide vane electric air valve device 14 can be regulated and controlled in a stepless mode, so that a proper control mode can be selected according to specific use working conditions; the air valve device can also be set within a certain angle according to the use working condition to carry out automatic swinging parametric control. For example: the outer layer guide vane electric air valve device 14 can be arranged under the parameter of 30 degrees +/-15 degrees to perform linear automatic air sweeping swing.
In the preferred embodiment, the blower housing 1 is of a flat and long structure.
In the preferred embodiment, the fan housing 1 is provided with the sterilizing device 11 inside, and the sterilizing device 11 can adopt ultraviolet lamps and other modes, so that gas can be automatically sterilized during the operation of the fan, and the occurrence and the propagation of germs can be effectively prevented.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (10)

1. The utility model provides a but high-efficient centrifugal induced fan of automatic dust removal of blowback which characterized in that: the air outlet opening and closing device comprises a fan shell, wherein an air inlet and an air outlet are respectively formed in two ends of the fan shell, a filter, a side air inlet channel, a blowing device and a volute are sequentially installed in the air inlet direction of the air outlet, a back-blowing reserved air opening is formed in the bottom of the fan shell, a fan flow channel switching device is arranged between the side air inlet channel and the back-blowing reserved air opening, and the air outlet opening is provided with an adjustable valve device for opening and closing the air outlet.
2. The back-blowable automatic dedusting high-efficiency centrifugal induction fan according to claim 1, characterized in that: the side air inlet channel comprises an upper air inlet and a lower air inlet, the fan flow channel switching device comprises a first sliding baffle matched with the upper air inlet/the lower air inlet and a second sliding baffle matched with the back-blowing reserved air inlet, and the first sliding baffle is connected with the second sliding baffle through a connecting rod.
3. The back-blowable automatic dedusting high-efficiency centrifugal induction fan according to claim 2, characterized in that: the fan flow channel switching device adopts a centralized control mode, and the movement of the first sliding baffle and the second sliding baffle is controlled by an electric actuator.
4. The back-blowable automatic dedusting high-efficiency centrifugal induction fan according to claim 1, characterized in that: the blowing device comprises a fan impeller and a motor which are arranged in a fan shell, and the motor adopts an EC integrated high-efficiency variable frequency motor.
5. The back-blowable automatic dedusting high-efficiency centrifugal induction fan according to claim 4, characterized in that: the fan is characterized in that a current collector is installed in the fan shell, the current collector is arc-shaped and is formed by spinning through a die, and the surface of the current collector is smooth and streamline.
6. The back-blowable automatic dedusting high-efficiency centrifugal induction fan according to claim 1, characterized in that: the fan impeller adopts a high-efficiency centrifugal fan impeller with a large flow coefficient, a high specific speed and a low pressure coefficient.
7. The back-blowable automatic dedusting high-efficiency centrifugal induction fan according to claim 1, characterized in that: the air outlet is provided with a nozzle device, and the valve device is arranged at the nozzle device.
8. The back-blowable automatic dedusting high-efficiency centrifugal induction fan according to claim 7, characterized in that: the nozzle device adopts an electric double-layer adjustable guide vane structure and is provided with an inner guide vane electric air valve device and an outer guide vane electric air valve device, the inner guide vane electric air valve device can be electrically adjusted in the vertical direction, the adjusting angle is 45-135 degrees, the outer guide vane electric air valve device can be adjusted in the horizontal direction, and the adjusting angle is 0-90 degrees.
9. The back-blowable automatic dedusting high-efficiency centrifugal inducing fan according to claim 1, characterized in that: the fan shell is of a flat and long structure.
10. The back-blowable automatic dedusting high-efficiency centrifugal induction fan according to claim 1, characterized in that: a disinfection device is arranged inside the fan shell.
CN202010578141.7A 2020-06-23 2020-06-23 But high-efficient centrifugal induced fan of blowback Pending CN111622962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010578141.7A CN111622962A (en) 2020-06-23 2020-06-23 But high-efficient centrifugal induced fan of blowback

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010578141.7A CN111622962A (en) 2020-06-23 2020-06-23 But high-efficient centrifugal induced fan of blowback

Publications (1)

Publication Number Publication Date
CN111622962A true CN111622962A (en) 2020-09-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010578141.7A Pending CN111622962A (en) 2020-06-23 2020-06-23 But high-efficient centrifugal induced fan of blowback

Country Status (1)

Country Link
CN (1) CN111622962A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114017395A (en) * 2021-10-29 2022-02-08 湖州瑞晨环保科技有限公司 Intelligent automatic ash removal system for fan

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114017395A (en) * 2021-10-29 2022-02-08 湖州瑞晨环保科技有限公司 Intelligent automatic ash removal system for fan

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