CN109838393B

CN109838393B - Centrifugal fan

Info

Publication number: CN109838393B
Application number: CN201910185796.5A
Authority: CN
Inventors: 应德池; 彭新华
Original assignee: Shanghai Yingda Blower Co ltd
Current assignee: Shanghai Yingda Blower Co ltd
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2020-08-14
Anticipated expiration: 2039-03-12
Also published as: CN109838393A

Abstract

The invention discloses a centrifugal fan, which relates to the technical field of fans and comprises a casing and an impeller, wherein the casing is respectively provided with an air inlet and an air outlet; a flow guide opening is formed in one side, far away from the air inlet, of the flow guide cover, and a flow guide surface for guiding the air flow to move towards the flow guide opening is formed on the inner wall of the flow guide cover; the air guide sleeve is connected with a filter air cylinder through the air guide opening, a plurality of filter air holes are uniformly formed in the inner wall of the filter air cylinder, and the outer space of the filter air cylinder is communicated with the air outlet. The centrifugal fan provided by the invention has the advantages of stable work, uniform gas discharge, convenience in maintenance, capability of purifying the discharged gas, capability of avoiding environmental pollution, guarantee of the health of a user and higher user experience.

Description

Centrifugal fan

Technical Field

The invention relates to the technical field of fans, in particular to a centrifugal fan.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and sends the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust extraction and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

The patent application with the prior publication number of CN104454585A discloses a single-unit centrifugal fan with a noise reduction function of a blade guide groove, which comprises a volute, a motor and an impeller, wherein an air inlet and an air outlet are formed in the volute, the impeller is arranged in the middle of the volute, and the motor is fixed in the middle of the volute through a support rod and is coaxially connected and matched with the impeller.

By adopting the technical scheme, the motor can drive the impeller to rotate, and air enters the volute from the air inlet and is discharged from the air outlet under the action of the impeller. The centrifugal fan has the following defects: 1. the dust removal effect is not achieved, and in the environment with serious dust, a large amount of dust is attached to the airflow discharged by the dust removal device, so that the environmental pollution is easily caused, and the body health of people is influenced; 2. this centrifugal fan exhaust gas velocity is very fast, and is not even enough, can make the obvious gas flow phenomenon appear in the environment, influences user's use and experiences.

Disclosure of Invention

In view of the above technical problems, an object of the present invention is to provide a centrifugal fan, which can filter dust in exhaust air, reduce gas flow rate, avoid environmental pollution, ensure human health, and improve user experience.

In order to achieve the purpose, the invention provides the following technical scheme:

a centrifugal fan comprises a casing and an impeller, wherein an air inlet and an air outlet are respectively formed in the casing, a flow guide sleeve is fixed on the inner wall of the casing, and the circumference of the flow guide sleeve surrounds the air outlet side of the impeller; a flow guide opening is formed in one side, far away from the air inlet, of the flow guide cover, and a flow guide surface for guiding air flow to move towards the flow guide opening is formed on the inner wall of the flow guide cover; the air guide sleeve is connected with an air filtering cylinder through the air guide opening, a plurality of air filtering holes are uniformly formed in the inner wall of the air filtering cylinder, and the outer space of the air filtering cylinder is communicated with the air outlet.

By adopting the technical scheme, in the working process of the centrifugal fan, airflow enters the impeller through the air inlet and is discharged to the inner side of the air guide sleeve from the air outlet side of the impeller; after the airflow contacts the inner wall of the air guide sleeve, the air guide surface can guide the airflow to flow towards the air guide opening and enter the air filtering cylinder through the air guide opening; then, after entering the filter air cylinder, the airflow is discharged through each air filtering hole on the filter air cylinder and enters the external space of the filter air cylinder; because the outer space of the air filtering cylinder is directly communicated with the air outlet, the air flow discharged through the air filtering holes can be discharged through the air outlet. In the process, the flow guide surface can guide the movement of the air flow, and can play a role in buffering the air flow so as to reduce the air flow speed; after the air current got into to strain the dryer, with the help of setting up each on straining the dryer and strain the wind hole, strain the dryer and not only can further reduce the gas flow rate, can play the filtering action to the air current moreover, get rid of part dust in the gas. Therefore, by the mode, not only can the environmental pollution be relieved, the body health of a user be guaranteed, but also the gas flow rate can be reduced, and the use experience of the user is improved.

The invention is further configured to: the flow guide surface is of a contraction type structure in the direction from the air inlet to the air outlet, and the flow guide surface is a curved surface or a conical surface.

By adopting the technical scheme, after the airflow contacts the flow guide surface, the flow guide surface guides the airflow to move towards the flow guide opening due to the fact that the flow guide surface is of the contraction type structure, and the airflow can enter the filter air cylinder through the flow guide opening.

The invention is further configured to: one side of the inner wall of the filter air cylinder, which is close to the flow guide opening, is of a contraction type structure and is provided with a non-return bulge.

By adopting the technical scheme, due to the existence of the non-return bulge, when the airflow moves to the filter air cylinder, the opening of the inlet of the filter air cylinder is relatively small, and the flow speed of the gas at the inlet of the filter air cylinder is accelerated; therefore, in the process that the air flow continuously discharges the filter air cylinder through each air filtering hole, dust accumulated in the filter air cylinder can not return to the guide cover through the opening of the filter air cylinder, and the phenomenon of dust raising in the guide cover is avoided.

The invention is further configured to: the air filtering cylinder is rotatably arranged in the casing, the air guide sleeve is rotatably connected with the air filtering cylinder through the air guide port, and a driving assembly used for driving the air filtering cylinder to rotate is further arranged on the casing.

Through adopting above-mentioned technical scheme, will strain the dryer and rotate and set up inside the casing, at gaseous through each exhaust in-process of straining the wind hole, drive assembly can drive and strain the dryer and last rotatory, not only can further improve gaseous homogeneity when straining the dryer and discharging, can avoid straining a large amount of adhesions of dust in the dryer moreover and strain on the inner wall of dryer, make things convenient for follow-up clearance.

The invention is further configured to: an installation cylinder is erected along the central position of the filter cylinder, a fixing component for fixing the installation cylinder is arranged on the inner wall of the casing, and a cleaning piece for cleaning the inner wall of the filter cylinder is further fixed on the outer side wall of the installation cylinder.

Through adopting above-mentioned technical scheme, through setting up the cleaning member on the installation section of thick bamboo, continuously rotatory in-process at the filter cylinder, the inner wall of filter cylinder is continuously cleaned to the cleaning member, sweeps the dust that adheres on the inner wall of filter cylinder, avoids the dust adhesion on the inner wall of filter cylinder, further improves the abluent convenience in filter cylinder later stage.

The invention is further configured to: the coaxial fixedly connected with drive shaft of impeller, the drive shaft level is worn to locate in the installation section of thick bamboo, just the drive shaft is kept away from the one end of impeller and is linked to each other with drive assembly.

Through adopting above-mentioned technical scheme, erect the drive shaft inside the installation section of thick bamboo, prevent that the dust adhesion from invading the impeller even on the drive shaft inside, not only can improve impeller moving stability, can reduce the quantity that needs frequent abluent part moreover, improve the convenience of using.

The invention is further configured to: and a filter is also arranged at the air outlet.

Through adopting above-mentioned technical scheme, the filter can further filter the air current of straining each wind hole exhaust, filters the relatively less dust particle of particle size in the air current, further improves the clean degree of this centrifugal fan exhaust air current.

The invention is further configured to: the inner wall of the shell is fixedly attached with a sound absorption layer.

By adopting the technical scheme, the sound absorption layer is arranged on the inner wall of the shell, and can absorb noise generated by air flow impacting each part, so that the noise reduction effect is achieved.

In conclusion, the invention has the following beneficial effects:

1. the guide cover is arranged on the outer side of the impeller in a surrounding mode and is matched with the air filtering cylinder with the plurality of air filtering holes, so that dust in gas discharged by the centrifugal fan is reduced, the problem of environmental pollution is relieved, the body health of a user is guaranteed, the gas flow rate can be reduced, and the use experience of the user is improved;

2. the filter air cylinder is driven by the driving assembly to continuously rotate in the casing and is matched with the cleaning piece arranged on the outer side wall of the mounting cylinder, so that the uniformity of air flow can be further improved, a large amount of dust can be prevented from being adhered to the inner wall of the filter air cylinder, and the convenience in cleaning the filter air cylinder is improved;

3. through set up secondary sound absorbing layer on the casing inner wall, play the effect of making an uproar of falling to whole centrifugal fan, further improve user's use and experience.

Drawings

FIG. 1 is an axial schematic view of the overall structure of one embodiment of the present invention;

FIG. 2 is a partially enlarged view of portion A of FIG. 1, which is mainly used to show the connection structure of the installation slot plate and the turnover installation plate;

FIG. 3 is a schematic structural diagram of a sound absorption layer of a cabinet according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of the overall structure of one embodiment of the present invention;

FIG. 5 is a partial enlarged view of the portion B in FIG. 4, which is mainly used to show the connection structure of the air guide sleeve and the filter drum;

fig. 6 is a partially enlarged view of a portion C in fig. 4, which is mainly used for showing a connection structure of the filter cartridge and the mounting cartridge.

Reference numerals: 100. a housing; 110. an air inlet; 120. an air outlet; 130. a sound absorbing layer; 200. an impeller; 300. a drive assembly; 310. a drive shaft; 320. installing a groove plate; 330. overturning the mounting plate; 331. a waist-shaped adjusting groove; 340. a drive motor; 350. a support screw; 360. a lock nut; 370. a first pulley mechanism; 380. a second pulley mechanism; 400. mounting the cylinder; 410. a first fixing frame; 420. a second fixing frame; 430. a switching part; 500. a pod; 510. a fixing plate; 520. a flow guide port; 530. a flow guide surface; 540. a cylindrical portion; 541. an annular base plate; 600. a filter air cylinder; 610. a wind filtering hole; 620. a support frame; 630. an annular ear plate; 640. a non-return protrusion; 700. a cleaning brush; 800. and (3) a filter.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1, a centrifugal fan includes a casing 100, the casing 100 is a rectangular or square cavity structure, and two opposite sides of the casing 100 are respectively provided with an air inlet 110 and an air outlet 120; in this embodiment, the side of the casing 100 where the air inlet 110 and the air outlet 120 are located may be set as the front side and the rear side of the casing 100, respectively. The casing 100 is provided therein with an impeller 200, and the casing 100 is further provided with a driving assembly 300 for driving the impeller 200 to rotate. Wherein, the air inlet side of the impeller 200 is opposite to the air inlet 110, and the air flow enters the impeller 200 at the first time after entering the casing 100; as the impeller 200 continues to rotate, the airflow is discharged from the peripheral side of the impeller 200, and finally discharged from the outlet 120. Referring to fig. 3, in order to reduce the noise generated during the operation of the centrifugal fan, a sound absorption layer 130 is further fixedly attached to the inner wall of the casing 100, and the sound absorption layer 130 may be a honeycomb board or a sound absorption cotton.

Referring to fig. 4, a mounting tube 400 is horizontally erected in the casing 100 along a direction from the air inlet 110 to the air outlet 120, the mounting tube 400 is a hollow structure, and one end of the mounting tube 400 close to the air inlet 110 is abutted to one side of the casing of the impeller 200, which is away from the air inlet 110. The inner wall of the casing 100 is further provided with a fixing member for fixing the mounting cylinder 400.

The fixing assembly includes a first fixing frame 410 and a second fixing frame 420, and the first fixing frame 410 and the second fixing frame 420 are spaced apart from each other along the length direction of the mounting cylinder 400. Wherein, the first fixing frame 410 is vertically arranged at one side of the installation cylinder 400 close to the impeller 200, and the upper and lower sides of the first fixing frame 410 are respectively fixedly connected with the inner wall of the top of the casing 100 and the outer wall of the installation cylinder 400; the second fixing frame 420 is vertically erected on one side of the mounting tube 400 far away from the impeller 200, and the upper and lower sides thereof are respectively fixedly connected with the inner wall of the top of the casing 100 and the mounting tube 400.

The installation cylinder 400 is internally provided with a driving shaft 310, and the driving shaft 310 can be horizontally and rotatably arranged in the installation cylinder 400 through a plurality of groups of bearings. One end of the driving shaft 310 is coaxially and fixedly connected with the impeller 200, and the other end of the driving shaft 310 extends to the inner side of the second fixing frame 420 and is connected with the driving assembly 300; the drive assembly 300 may drive the impeller 200 to rotate synchronously via a drive shaft 310.

Referring to fig. 4, a dome 500 is further disposed in the casing 100, and the dome 500 may be disposed in a horn-shaped structure as a whole; a plurality of fixing plates 510 are fixed on the outer side wall of the pod 500, the pod 500 may be fixedly connected to the inner wall of the casing 100 through each fixing plate 510, and the first fixing frame 410 vertically penetrates the pod 500. After the air guide sleeve 500 is installed, the impeller 200 is positioned in the center of the air guide sleeve 500, and the air guide sleeve 500 circumferentially surrounds the air outlet side of the impeller 200; at this time, the large opening of the pod 500 faces the side of the casing 100 where the inlet 110 is located, the small opening of the pod 500 forms the diversion opening 520, and the inner wall of the pod 500 forms a diversion surface 530 for guiding the airflow to move toward the diversion opening 520. Since the dome 500 is trumpet-shaped, the diversion surface 530 forms a contraction-type structure in a direction from the inlet 110 to the outlet 120; in this embodiment, the guiding surface 530 may be a curved surface or a conical surface.

The casing 100 is further horizontally provided with a filter cylinder 600, the filter cylinder 600 is a hollow cylindrical structure, and is located on one side of the air guide sleeve 500 departing from the air inlet 110 and integrally sleeved on the outer side of the mounting cylinder 400. One side of the filter air cylinder 600 close to the air inlet 110 is connected with the part of the guide opening 520 on the guide cover 500; in actual operation, as the airflow continuously enters the air guide sleeve 500, the flow guide surface 530 on the air guide sleeve 500 continuously guides the airflow into the filter air cylinder 600. After the gas enters the filter air duct 600, in order to discharge the gas, a plurality of air filtering holes 610 are uniformly formed in the side wall of the air guide sleeve 500, and the external spaces of the air filtering holes 610 are communicated with the air outlet 120 on the casing 100; in operation, the air flow in the air filter cartridge 600 can be discharged through each air filter hole 610, and each air filter hole 610 can effectively filter the particles with larger particle size in the air flow.

Referring to fig. 4, in order to install the filter air duct 600, two groups of support frames 620 are vertically erected inside the casing 100, and the support frames 620 may be arranged at intervals along the length direction of the filter air duct 600; the whole two support frames 620 erected on the filter air cylinder 600, and the upper sides of the two support frames 620 are rotatably connected with the outer side wall of the filter air cylinder 600 through bearings, so that the filter air cylinder 600 can flexibly rotate inside the casing 100.

Referring to fig. 5, a cylindrical portion 540 extending horizontally is integrally formed on a side of the pod 500 where the diversion opening 520 is located, an annular bottom plate 541 extends vertically and inwardly on an inner wall of the cylindrical portion 540 away from the air inlet 110, and the diversion opening 520 is formed in a central position of the annular bottom plate 541 in a penetrating manner. Correspondingly, the outer wall of the side, close to the air inlet 110, of the filter air duct 600 is vertically and outwardly extended with an annular ear plate 630, the side, close to the annular ear plate 630, of the filter air duct 600 is embedded in the cylindrical part 540, the annular ear plate 630 is parallel to the annular bottom plate 541, and a thrust bearing is tightly abutted between the annular ear plate 630 and the annular bottom plate 541, so that the filter air duct 600 is rotatably connected with the air guide sleeve 500. Meanwhile, one side of the inner wall of the filter air cylinder 600, which is close to the flow guide port 520, is of a contraction type structure, and a non-return bulge 640 is formed in a bulge manner; the non-return bulge 640 has an annular structure, and the inner diameter of the filter air cylinder 600 has a significant reduction tendency at the non-return bulge 640. In the process that the air current continuously discharges the filter air cylinder 600 through each air filtering hole 610, dust accumulated in the filter air cylinder 600 cannot return to the air guide sleeve 500 through the opening of the filter air cylinder 600, and the phenomenon of dust raising in the air guide sleeve 500 is avoided. As shown in fig. 6, one side of the filter air duct 600, which is away from the air guide sleeve 500, is inwardly contracted and integrally formed with the adapter 430, the adapter 430 is sleeved on the mounting tube 400, and the inner wall of the adapter 430 and the outer side wall of the mounting tube 400 can form a rotational connection through a bearing.

Referring to fig. 1 and 2, the driving assembly 300 includes a mounting groove plate 320 fixedly disposed at the top of the cabinet 100, the mounting groove plate 320 is disposed horizontally, and the mounting groove plate 320 is provided with a flip mounting plate 330. One side of the length direction of the turning mounting plate 330 is hinged to two opposite side walls of the mounting groove plate 320, one side of the turning mounting plate 330, which is far away from the hinged position, is also vertically penetrated with a waist-shaped adjusting groove 331, and the waist-shaped adjusting grooves 331 can be arranged in two groups at intervals along the width direction of the turning mounting plate 330. Support screw rods 350 penetrate through the two kidney-shaped adjusting grooves 331, locking nuts 360 used for fixing the turnover mounting plate 330 are in threaded connection with the upper sides of the support screw rods 350, and the lower ends of the support screw rods 350 are hinged to the side wall of the mounting groove plate 320. In operation, a user may adjust the tilt angle of the roll-over mounting plate 330 after loosening the locking nut 360.

Referring to fig. 4, the driving assembly 300 includes a driving motor 340, the driving motor 340 is fixed on the upside of the turnover mounting plate 330, and the output shaft of the driving motor 340 is connected with a first pulley mechanism 370 and a second pulley mechanism 380 respectively. The driving motor 340 is connected to one end of the driving shaft 310 far away from the impeller 200 through a first pulley mechanism 370, and can drive the driving shaft 310 and the impeller 200 to synchronously rotate through the first pulley mechanism 370; the driving motor 340 is connected with the adapting part 430 on the filter air cylinder 600 through the second belt wheel mechanism 380, the second belt wheel mechanism 380 can be set into a structure form of speed reduction transmission, and the driving motor 340 can drive the filter air cylinder 600 to synchronously rotate through the second belt wheel mechanism 380.

Meanwhile, in order to reduce dust adhered to the inner wall of the filter air duct 600, a cleaning member for cleaning the inner wall of the filter air duct 600 is further provided on the outer side wall of the mounting tube 400; in this embodiment, the cleaning member may be a cleaning brush 700, and the cleaning brush 700 may be provided in a plurality of sets in a spiral line form outside the mounting cylinder 400. In operation, when driving motor 340 drives filter cylinder 600 to rotate through second band pulley mechanism 380, each cleaning brush 700 can clean the inner wall of filter cylinder 600 simultaneously, sweeps off the dust adhered to the inner wall of filter cylinder 600, and facilitates the later cleaning of filter cylinder 600.

In addition, in order to further improve the dust removing effect, a filter 800 is further disposed in the casing 100 near the air outlet 120; in this embodiment, the filters 800 may be arranged at intervals, and each filter 800 may be arranged in one or more combinations of the primary filter 800, the intermediate filter 800 and the high efficiency filter 800. The filter 800 can effectively filter out particles with relatively small particle size in the air flow discharged from the filter air cylinder 600, thereby reducing environmental pollution.

The working principle of the embodiment is as follows: in practical operation, as the impeller 200 rotates continuously, air enters the air guide sleeve 500 from the air outlet side of the impeller 200, and the air guide surface 530 on the air guide sleeve 500 guides the air flow into the filter air cylinder 600 continuously. Meanwhile, the driving assembly 300 can also drive the filter cylinder 600 to rotate synchronously, the air flow entering the filter cylinder 600 can be discharged from each air filtering hole 610 on the filter cylinder 600, and the particles with larger particle diameters in the air flow are left in the filter cylinder 600. Subsequently, the filter 800 further filters the air flow discharged from the filter cartridge 600 to purify the air flow again. Through this kind of mode, reduce the dust in the gas that centrifugal fan discharged, alleviate environmental pollution's problem, guarantee that the user is healthy to can reduce the gas velocity of flow, improve user's use and experience.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A centrifugal fan comprises a casing (100) and an impeller (200), wherein the casing (100) is respectively provided with an air inlet (110) and an air outlet (120), and is characterized in that,

a flow guide sleeve (500) is fixed on the inner wall of the casing (100), and the circumference of the flow guide sleeve (500) surrounds the air outlet side of the impeller (200); a flow guide opening (520) is formed in one side, away from the air inlet (110), of the flow guide cover (500), and a flow guide surface (530) used for guiding air flow to move towards the flow guide opening (520) is formed on the inner wall of the flow guide cover (500);

the air guide sleeve (500) is connected with a filter air cylinder (600) through an air guide opening (520), a plurality of air filtering holes (610) are uniformly formed in the inner wall of the filter air cylinder (600), and the outer space of the filter air cylinder (600) is communicated with the air outlet (120);

one side of the inner wall of the filter air cylinder (600) close to the flow guide port (520) is of a contraction type structure and is provided with a non-return bulge (640).

2. A centrifugal fan according to claim 1, wherein the flow guiding surface (530) is of a convergent type in a direction from the inlet (110) to the outlet (120), and the flow guiding surface (530) is curved or tapered.

3. The centrifugal fan as claimed in claim 1, wherein the filter air duct (600) is rotatably disposed in the casing (100), the air guide sleeve (500) is rotatably connected to the filter air duct (600) through the air guide opening (520), and the casing (100) is further provided with a driving assembly (300) for driving the filter air duct (600) to rotate.

4. The centrifugal fan according to claim 3, wherein a mounting cylinder (400) is mounted along a central position in the filter air cylinder (600), a fixing component for fixing the mounting cylinder (400) is arranged on an inner wall of the casing (100), and a cleaning member for cleaning the inner wall of the filter air cylinder (600) is further fixed on an outer side wall of the mounting cylinder (400).

5. The centrifugal fan as claimed in claim 4, wherein the impeller (200) is coaxially and fixedly connected with a driving shaft (310), the driving shaft (310) is horizontally arranged in the mounting cylinder (400) in a penetrating manner, and one end of the driving shaft (310) far away from the impeller (200) is connected with the driving assembly (300).

6. The centrifugal fan according to any one of claims 1-5, wherein a filter (800) is further disposed at the air outlet (120).

7. A centrifugal fan according to any one of claims 1-5, wherein a sound absorbing layer (130) is further fixedly attached to the inner wall of the casing (100).