CN113623693A - Centrifugal fan for discharging oil fume - Google Patents

Abstract

The invention relates to a centrifugal fan for discharging oil smoke, which comprises a volute component with an air inlet and an air outlet, an annular impeller which is rotatably arranged in the volute component, an inner ring filter screen arranged on an inner ring of the annular impeller, an outer ring filter screen arranged on an outer ring of the annular impeller and a rotation source connected with the annular impeller, wherein the rotation source can drive the annular impeller to rotate in the volute component so as to guide the oil smoke to sequentially flow through the air inlet, the inner ring filter screen, the annular impeller, the outer ring filter screen and the air outlet. The centrifugal fan provided by the invention can filter oil smoke while discharging the oil smoke, so that pollution of the oil smoke to the annular air environment during discharging can be reduced, the structure of a smoke discharging system can be simplified, and the construction and use cost of the smoke discharging system can be reduced.

Description

Centrifugal fan for discharging oil fume

Technical Field

The invention belongs to the technical field of smoke exhaust systems, and particularly relates to a centrifugal fan for exhausting oil smoke.

Background

The centrifugal fan is widely applied to smoke exhaust systems of large-scale fields such as hotels, office buildings, enterprises and the like by virtue of the characteristics of large suction force, low noise and compact structure. However, the existing centrifugal fan only has a function of pumping flue gas, but does not have a function of filtering the flue gas, so that the existing smoke exhaust system has to include a flue gas filtering device. Although the existing smoke exhaust system can filter smoke through the smoke filtering equipment to reduce pollution of the smoke to the annular atmosphere when the smoke is exhausted, the added smoke filtering equipment undoubtedly increases the construction cost and the use cost of the smoke exhaust system.

Disclosure of Invention

In order to solve all or part of the problems, the invention aims to provide a centrifugal fan for discharging oil smoke, which is used for solving the problem that the centrifugal fan does not have a smoke filtering function, so that the pollution of smoke to the annular air environment during discharge can be reduced, the structure of a smoke discharging system is facilitated, and the construction and use cost of the smoke discharging system is reduced.

According to the present invention, there is provided a centrifugal fan for discharging oil smoke, the centrifugal fan comprising: a volute assembly having an air inlet and an air outlet; an annular impeller rotatably housed within the volute assembly; the inner ring filter screen is arranged on the inner ring of the annular impeller; the outer ring filter screen is arranged on the outer ring of the annular impeller; and the rotation source is connected with the annular impeller and can drive the annular impeller to rotate in the volute component, so that the oil smoke is guided to sequentially flow through the air inlet, the inner ring filter screen, the annular impeller, the outer ring filter screen and the air outlet.

Further, the aperture of the mesh of the inner ring filter screen is larger than that of the mesh of the outer ring filter screen.

Furthermore, the aperture of the meshes of the inner ring filter screen is 3-6mm, and the aperture of the meshes of the outer ring filter screen is 1-2 mm.

Further, annular impeller includes first crown plate, the second crown plate relative with first crown plate and establishes a plurality of slope blades between first crown plate and the second crown plate and along circumference interval arrangement, the inner circle filter screen embedding is in the inner circle of first crown plate and the inner circle of second crown plate and with first crown plate and/or second crown plate rigid coupling, outer lane filter screen parcel is whole slope blades establish between first crown plate and the second crown plate.

Further, the centrifugal fan further comprises a blowdown valve provided on a bottom of the volute assembly in a radial direction.

Furthermore, the centrifugal fan further comprises a switching component arranged in the volute component, the rotating source is a motor, a shell of the motor is fixed on one side, far away from the air inlet, of the volute component, and a rotating shaft of the motor rotatably penetrates into the volute component and is connected with the annular impeller through the switching component.

Furthermore, the switching part is including fixed cover the carousel of sealing in the pivot of motor and be used for with seal carousel and annular impeller keep away from the bolt that one side of air intake links to each other.

Furthermore, the centrifugal fan also comprises a guide pipe which is arranged at the air inlet of the volute component in a penetrating mode, and the guide pipe is used for conveying oil stain cleaning agent into the volute component.

Further, the conduit comprises a liquid inlet arranged outside the volute component, a gas inlet arranged outside the volute component and a gas-liquid outlet arranged inside the volute component.

Further, the volute assembly comprises an open volute formed with an air outlet and a side cover detachably buckled with the open side of the open volute and formed with the air inlet.

According to the technical scheme, the centrifugal fan for discharging the oil smoke is mainly improved in that an inner ring filter screen and an outer ring filter screen are correspondingly added on an inner ring and an outer ring of an annular impeller. This centrifugal fan passes through rotation source drive annular impeller at the spiral case subassembly internal rotation, thereby the guide oil smoke passes through spiral case subassembly's air intake in proper order, the inner circle filter screen, annular impeller, outer lane filter screen and spiral case subassembly's air outlet, wherein inner circle filter screen and outer lane filter screen can intercept pollutants such as oil mist and granule in it when the oil smoke passes through inner circle filter screen and outer lane filter screen, prevent pollutants such as oil mist and granule along with in the gaseous entering air circumstance of oil smoke, make centrifugal fan possess the filtering capability to the oil smoke, this pollution that not only can reduce the flue gas and cause annular space when discharging, can also simplify the structure of system of discharging fume, reduce the construction and the use cost of system of discharging fume. In addition, the centrifugal fan is convenient to operate and maintain, good in operation stability and convenient to implement, popularize and apply.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure:

fig. 1 is a schematic structural view of a centrifugal fan for discharging oil smoke according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a ring-shaped impeller according to an embodiment of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

The invention will be further explained with reference to the drawings.

Fig. 1 is a schematic structural view of a centrifugal fan for discharging oil smoke according to an embodiment of the present invention, and fig. 2 is a schematic structural view of an annular impeller 2 according to an embodiment of the present invention. As shown in fig. 1 and 2, an embodiment of the present invention provides a centrifugal fan 100 for discharging oil smoke, the centrifugal fan 100 including a volute assembly 1 having an air inlet 11 and an air outlet 12, an annular impeller 2 rotatably installed in the volute assembly 1, an inner ring screen 3 provided on an inner ring of the annular impeller 2, an outer ring screen 4 provided on an outer ring of the annular impeller 2, and a rotation source 5 connected to the annular impeller 2. The rotation source 5 can drive the annular impeller 2 to rotate in the volute component 1, so that oil smoke is guided to flow through the air inlet 11, the inner ring filter screen 3, the annular impeller 2, the outer ring filter screen 4 and the air outlet 12 in sequence.

According to the embodiment of the invention, the main improvement of the centrifugal fan 100 is that an inner ring filter screen 3 and an outer ring filter screen 4 are added on the inner ring and the outer ring of the annular impeller 2 correspondingly. This centrifugal fan 100 is through rotating 5 drive annular impeller 2 rotations in spiral case subassembly 1 of source, thereby the guide oil smoke passes through spiral case subassembly 1's air intake 11 in proper order, inner circle filter screen 3, annular impeller 2, outer lane filter screen 4 and spiral case subassembly 1's air outlet 12, wherein inner circle filter screen 3 and outer lane filter screen 4 can intercept pollutants such as oil mist and granule in it when the oil smoke passes through inner circle filter screen 3 and outer lane filter screen 4, prevent among the gaseous entering air circumstance of pollutants such as oil mist and granule along with the oil smoke, make centrifugal fan 100 possess the filtering capability to the oil smoke, this pollution that not only can reduce the flue gas and cause annular space when discharging, can also simplify the structure of system of discharging fume, reduce the construction and the use cost of system of discharging fume.

In this embodiment, the inner ring screen 3 has a mesh hole diameter larger than that of the outer ring screen 4. The structure can carry out two-stage filtration on the oil smoke, firstly, the inner ring filter screen 3 filters out oil mist and particles with large diameters in the oil smoke, and then the outer ring filter screen 4 further filters the residual oil mist and particles in the oil smoke, so that the effect of the centrifugal fan 100 on filtering the oil smoke can be improved. Meanwhile, the two-stage filtering structure is also beneficial to improving the using effect of each filter screen and reducing the cleaning frequency of each filter screen.

Experiments prove that when the aperture of the meshes of the inner ring filter screen 3 is larger than 6mm, the oil mist and particles with large diameters in the oil smoke cannot be fully filtered; when the aperture of the mesh of the inner ring filter 3 is less than 3mm, the inner ring filter 3 is easily clogged with oil mist and particles of large diameter in the soot, so it is preferable that the aperture of the mesh of the inner ring filter 3 is 3-6 mm. When the aperture of the mesh of the outer ring filter screen 4 is larger than 2mm, oil mist and particles with small diameters in the oil smoke cannot be fully filtered; when the aperture of the mesh of the outer ring filter screen 4 is smaller than 1mm, the oil mist and particles with small diameter in the oil smoke easily block the outer ring filter screen 4, so the aperture of the mesh of the outer ring filter screen 4 is preferably 1-2 mm.

In the present embodiment, the ring-shaped impeller 2 is preferably a closed impeller, and the ring-shaped impeller 2 includes a first ring plate 21, a second ring plate 22 opposite to the first ring plate 21, and a plurality of inclined blades (not shown) provided between the first ring plate 21 and the second ring plate 22 and arranged at intervals in the circumferential direction. Compared with other structures, the annular impeller 2 with the structure can better restrict the flow path of the oil smoke, so that the oil smoke is prevented from directly being discharged from the air outlet 12 of the volute component 1 without flowing through the impeller, and the oil smoke filtering effect of the centrifugal fan 100 can be further improved. In other embodiments, the ring-shaped impeller 2 may also be of other configurations, such as a semi-open impeller.

In the present embodiment, the inner ring screen 3 is embedded in the inner ring of the first ring plate 21 and the inner ring of the second ring plate 22 and is fixed to the first ring plate 21 and/or the second ring plate 22. The outer screen 4 wraps around all the inclined blades and is fixed in an embedded manner between the first ring plate 21 and the second ring plate 22. Compared with other structures, the filter screen of the structure is simpler to mount, the manufacturing cost of the centrifugal fan 100 can be reduced, and a user can directly reform on the existing centrifugal fan 100.

In this embodiment, the centrifugal fan 100 further comprises a blow-off valve 6 provided on the bottom of the volute assembly 1 in the radial direction. Because the oil mist and the particles attached to the filter screen are thrown to the inner wall of the volute component 1 and collected to the bottom of the volute component 1 under the action of centrifugal force after being accumulated to a certain degree, the blowoff valve 6 arranged at the bottom of the volute component 1 can conveniently and quickly discharge the oil mist and the particles collected at the bottom of the volute component 1, and therefore the phenomenon that the oil mist and the particles accumulated in the volute component 1 are rolled up by the annular impeller 2 and discharged to the air environment together with oil smoke can be avoided. It should be noted that, the specific dirt discharge period is not required in this embodiment, and those skilled in the art can determine the specific dirt discharge period according to the size of the volute assembly 1, the proportional relationship between the annular impeller 2 and the volute assembly 1, and the amount of oil smoke discharged, for example, the dirt discharge period may be 20 to 30 days.

In the present embodiment, the rotating source 5 is preferably a motor, which not only can reduce the manufacturing and using cost of the centrifugal fan 100, and further reduce the manufacturing and using cost of the smoke exhaust system, but also can make the use of the smoke exhaust system more convenient and faster. It should be noted that in other embodiments, the rotation source 5 may also be other devices capable of generating mechanical energy as long as it can drive the ring-shaped impeller 2 to rotate, which is a conventional choice and means in the field, and a person skilled in the art can select the device according to the needs, and the description is omitted here.

Meanwhile, the centrifugal fan 100 may further include an adapter component disposed in the volute component 1, a housing of the motor is fixed to a side of the volute component 1 away from the air inlet 11, and a rotating shaft of the motor rotatably penetrates into the volute component 1 and is connected to the annular impeller 2 through the adapter component. Preferably, the adapter includes a sealing turntable fixedly sleeved on the rotating shaft of the motor and a bolt for connecting the sealing turntable and one side of the annular impeller 2 away from the air inlet 11. The adapter part with the structure can ensure that the connection between the rotating shaft of the motor and the annular impeller 2 is more reliable. It should be noted that the adapter component may also be of other known structures as long as it can connect the rotating shaft with the ring-shaped impeller 2.

In this embodiment, the centrifugal fan 100 further comprises a conduit 7 penetrating into the air inlet 11 of the volute assembly 1, and the conduit 7 is used for conveying oil-contaminated detergent into the volute assembly 1. The oil stain cleaning agent can enter the volute component 1 and clean oil mist adhered to the annular impeller 2, the inner ring filter screen 3 and the outer ring filter screen 4, so that the oil fume pumping capacity and the oil fume filtering effect of the centrifugal fan 100 are close to the state of leaving a factory.

In the present embodiment, the conduit 7 includes a liquid inlet 71 disposed outside the volute assembly 1, a gas inlet 72 disposed outside the volute assembly 1, and a gas-liquid outlet 73 disposed inside the volute assembly 1. The duct 7 can mix the oil stain detergent and the gas and promote the oil stain detergent leaving the duct 7 to be atomized, so that the oil stain detergent can enter the centrifugal fan 100 more dispersedly, the effect of cleaning the inside of the centrifugal fan 100 is improved, and the oil smoke pumping capacity and the oil smoke filtering effect of the centrifugal fan 100 are promoted to be as close to the state when leaving a factory as possible.

In the present embodiment, the scroll casing assembly 1 includes an open scroll casing 13 formed with the air outlet 12 and a side cover 14 detachably engaging an open side of the open scroll casing 13 and formed with the air inlet 11. When the filter screen is blocked or the oil mist and the particles gathered at the bottom of the volute component 1 cannot be discharged through the blowoff valve 6, the side cover 14 can be detached to clean the filter screen or the oil mist and the particles, so that the maintenance and repair cost of the centrifugal fan 100 can be reduced, and the use cost of the smoke exhaust system is further reduced.

In summary, the centrifugal fan 100 for discharging oil smoke provided by the invention can solve the problem that the centrifugal fan does not have a smoke filtering function, which not only can reduce pollution to the annular atmosphere caused by smoke during discharge, but also is beneficial to simplifying the structure of a smoke discharging system and reducing the construction and use costs of the smoke discharging system.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. A centrifugal fan for discharging oil smoke, characterized in that the centrifugal fan comprises:

a volute assembly having an air inlet and an air outlet;

an annular impeller rotatably housed within the volute assembly;

the inner ring filter screen is arranged on the inner ring of the annular impeller;

the outer ring filter screen is arranged on the outer ring of the annular impeller;

and the rotation source is connected with the annular impeller and can drive the annular impeller to rotate in the volute component, so that the oil smoke is guided to sequentially flow through the air inlet, the inner ring filter screen, the annular impeller, the outer ring filter screen and the air outlet.

2. The centrifugal fan as claimed in claim 1, wherein the apertures of the meshes of the inner ring of screens are larger than the apertures of the meshes of the outer ring of screens.

3. The centrifugal fan as claimed in claim 2, wherein the apertures of the meshes of the inner ring of the filter screens are 3-6mm, and the apertures of the meshes of the outer ring of the filter screens are 1-2 mm.

4. The centrifugal fan according to any one of claims 1 to 3, wherein the annular impeller comprises a first annular plate, a second annular plate opposite to the first annular plate, and a plurality of inclined blades provided between the first annular plate and the second annular plate and arranged at intervals along the circumferential direction, the inner ring screen is embedded in the inner ring of the first annular plate and the inner ring of the second annular plate and is fixedly connected with the first annular plate and/or the second annular plate, and the outer ring screen wraps all the inclined blades and is provided between the first annular plate and the second annular plate.

5. The centrifugal fan of any one of claims 1 to 3 further comprising a blowdown valve provided on a bottom of the volute assembly in a radial direction.

6. The centrifugal fan as claimed in any one of claims 1 to 3, further comprising an adapter component disposed in the volute component, wherein the rotation source is a motor, a housing of the motor is fixed to a side of the volute component away from the air inlet, and a rotation shaft of the motor rotatably penetrates into the volute component and is connected to the annular impeller via the adapter component.

7. The centrifugal fan as claimed in claim 6, wherein the adapter member includes a sealing turntable fixedly sleeved on the rotating shaft of the motor and a bolt for connecting the sealing turntable and one side of the annular impeller away from the air inlet.

8. The centrifugal fan according to any one of claims 1-3 further comprising a conduit penetratingly disposed at an air inlet of the volute assembly, the conduit for delivering an oily cleaner into the volute assembly.

9. The centrifugal fan of claim 8, wherein the conduit comprises a liquid inlet disposed outside the volute assembly, a gas inlet disposed outside the volute assembly, and a gas-liquid outlet disposed within the volute assembly.

10. The centrifugal fan according to any one of claims 1 to 3, wherein the volute assembly comprises an open volute formed with an air outlet and a side cover detachably snap-fitted to an open side of the open volute and formed with the air inlet.

Images