CN211082376U - Smoke-free hot pot table exhaust fan - Google Patents
Smoke-free hot pot table exhaust fan Download PDFInfo
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- CN211082376U CN211082376U CN201921527920.3U CN201921527920U CN211082376U CN 211082376 U CN211082376 U CN 211082376U CN 201921527920 U CN201921527920 U CN 201921527920U CN 211082376 U CN211082376 U CN 211082376U
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Abstract
The utility model discloses an exhaust fan for a smokeless hot pot table, which comprises a shell and a wind wheel arranged in the shell through a motor, wherein the wind wheel is of a cylindrical bidirectional air inlet structure, the wall of the wind wheel extends inwards and is provided with a plurality of wind wheel blades distributed circumferentially, an arc-shaped web plate is arranged in the middle of the wind wheel, the wind wheel is fixedly connected to an output shaft of the motor through a shaft sleeve at the central position of the web plate, and a noise reduction hole is also formed in the web plate; the wind wheel blades are divided into two sections along the axial direction of the wind wheel, and the two sections of wind wheel blades are alternately arranged along the circumferential direction; the windward surface and the flow guide surface of the wind wheel blade are both arc-shaped, the windward surface is arc-shaped with the radius of 17-20 mm, the diameter D of the root circle of the wind wheel blade is 145-152 mm, and the diameter D' of the top circle of the wind wheel blade is 125-130 mm; and the diameter D' of the circle where the center of the circular arc of the windward side of all the wind wheel blades is positioned is 120-125 mm; the length H of the wind wheel is 145 mm-150 mm; the rotating speed of the motor is 1500 r/min-1700 r/min. The exhaust fan has good effect of separating oil smoke from air and low noise.
Description
Technical Field
The utility model relates to the technical field of hot pot table devices, in particular to an exhaust fan for a smokeless hot pot table.
Background
Chafing dish is a very popular diet for the public. However, during the cooking process, a large amount of oil smoke and water vapor are generated, so that a large amount of hot pot smoke is diffused in a room, the volatilized hot pot smoke not only pollutes air, but also adheres to clothes, and cannot be dissipated for several days. For the hot pot restaurant, because the number of the hot pot tables is large, and the phenomenon is more obvious when the hot pot table is used for concentrated food supply, the popularization of the hot pot is hindered to a certain extent.
In order to reduce the diffusion of water vapor and oil smoke, the hot pot table with air draft purification effect is already available at present. However, the purifying device installed in the existing hot pot table is limited by the structure of the wind wheel and the rotating speed of the fan of about 800r/min, so that the purifying effect of separating oil smoke from air is poor, and a large amount of oil smoke is still contained in the air coming out of the fan; if the rotating speed of the fan is simply increased, noise is increased, and people can be influenced to enjoy delicious food; and the service life of the fan is shortened, the fan needs to be frequently replaced, and the cost is increased.
Disclosure of Invention
The utility model provides an exhaust fan for smokeless hot pot table with good separation effect and low noise, which aims at the problem of poor effect of the exhaust fan arranged in the existing hot pot table for separating oil smoke from air.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: an exhaust fan for a smokeless hot pot table comprises a shell and a wind wheel arranged in the shell through a motor, wherein the wind wheel is of a cylindrical bidirectional air inlet structure, the wall of the wind wheel extends inwards and is provided with a plurality of wind wheel blades distributed circumferentially, an arc-shaped web plate is arranged in the middle of the wind wheel, the wind wheel is fixedly connected to an output shaft of the motor through a shaft sleeve in the center of the web plate, and a noise reduction hole is formed in the web plate; the wind wheel blades are divided into two sections along the axial direction of the wind wheel, and the two sections of wind wheel blades are alternately arranged along the circumferential direction, are equal in number and are 55-65 pieces; the windward surface and the flow guide surface of the wind wheel blade are both arc-shaped, the windward surface is arc-shaped with the radius of 17-20 mm, the root circle diameter D of the wind wheel blade is 145-152 mm, and the top circle diameter D' of the wind wheel blade is 125-130 mm; and the diameter D' of the circle where the center of the circular arc of the windward side of all the wind wheel blades is positioned is 120-125 mm; the length H of the wind wheel is 145-150 mm; the rotating speed of the motor is 1500 r/min-1700 r/min.
The utility model provides an exhaust fan for a smokeless hot pot table, which comprises a shell and a wind wheel, wherein the shell is provided with two air inlets, each air inlet is provided with a net-shaped air inlet cover, and one net-shaped air inlet cover is provided with an installation structure for installing a motor; the middle part of the wind wheel is provided with an arc-shaped web plate, and the wind wheel is fixedly connected to the output shaft of the motor through a shaft sleeve at the central position of the web plate. The wind wheel is limited by parameters such as diameter, length, number, shape and arrangement mode of blades and is divided into two sections of circumferentially staggered arrangement modes in the length direction, so that the wind wheel has the characteristics of large air volume, strong suction force, high structural strength, long service life and low noise under the working condition of high rotating speed; through the matching of a high-rotating-speed motor, the mixed gas of oil fume, water vapor and air in the peripheral range of the hot pot table can be completely sucked by a fan, and the oil, the water and the air of the mixed gas are separated to form liquid water and oil and purified air through the dual functions of high-speed impact of the windward side of the wind wheel blade and centrifugal separation, wherein the oil and the water are thrown on the inner wall of the fan shell by the wind wheel blade under the action of centrifugal force and then flow downwards under the action of gravity so as to be intensively treated; the air is discharged through the wind channel after purifying, even return and arrange in the chafing dish table periphery, can not constitute the air pollution to the environment of having a dinner. The blades of the wind wheel are arranged in a segmented and staggered manner, so that the resonance phenomenon of the wind wheel can be reduced, and the motion balance characteristic is improved; the noise reduction hole is used as a side with lower negative pressure and a side with higher negative pressure to supplement mixed gas, so that the negative pressure on the two sides of the web plate is balanced, and the noise is reduced. The quantity of the blades, the diameter of the root circle, the diameter of the top circle, the radius of the cambered surface and the diameter of the circle where the radius of the cambered surface is located are basic parameters of the blades, and the effect that oil water and air are basically and completely separated can be achieved by matching the rotating speed which is only doubled compared with the prior art. Reasonable selection of all the parameters requires a large amount of theoretical calculation and experimental verification, and is finally determined after multiple modifications; the blade parameters, the length of the wind wheel and the rotating speed of the motor jointly determine the rated air volume of the fan so as to meet the requirement of the air draft volume under the condition of multi-user use. Experiments prove that the performance indexes of the fan such as the suction rate (95%), the purification rate (98%), the working noise (less than or equal to 55 decibels) and the like for the mixed gas of the smoke of the chafing dish are obviously improved compared with the existing smokeless chafing dish table.
Further, the windward side is in a circular arc shape with the radius of 18mm, the diameter D of the root circle of each wind wheel blade is 150mm, the diameter D 'of the top circle of each wind wheel blade is 128mm, and the diameter D' of the circle where the centers of the windward side circular arcs of all the wind wheel blades are located is 123 mm; the length H of the wind wheel is 148 mm. Through optimizing and matching the circular arc radius of the windward side of the wind wheel blades, the diameters of the root circle and the top circle of the wind wheel blades, the diameter of the circle where the center of the circular arc of the windward side of all the wind wheel blades is located and the length of the wind wheel, the structural parameters are more reasonable, the separation effect of oil smoke and air is better, and the operation noise is lower.
Further, the rotating speed of the motor is 1600 r/min. Through further limiting the rotating speed, the effect of better combination of the pumping rate and the noise is obtained.
Further, the number of the two segments of the wind wheel blades is 60. So as to obtain better comprehensive performance.
Further, the part of the wind wheel blade close to the wind wheel cylinder opening is transited from the blade top to the blade root through an arc. Therefore, the wind resistance can be reduced, the smooth inflow of air is facilitated, and the operation noise is reduced.
Further, the part of the wind wheel blade close to the web gradually increases the blade width through a circular arc-shaped extension section extending towards the middle of the wind wheel. Therefore, the structural strength of the wind wheel blade and the web plate can be enhanced, the service life is prolonged, resonance is reduced or eliminated, and the operation noise is reduced.
Furthermore, the noise reduction holes are quadrilateral holes formed by intersecting fan-shaped and annular strips. The resistance of air circulation is reduced, the smooth air circulation is facilitated, and the noise is reduced.
Furthermore, a plurality of noise reduction holes are uniformly distributed on the web plate in the circumferential direction. Reduce turbine phenomenon, the noise reduction effect is better.
Further, the output shaft of the motor penetrates from the concave side of the arc-shaped web plate to the convex side. Therefore, the situation that the mixed gas is supplemented to the lateral concave side of the convex surface through the noise reduction holes to form a channel for air flowing is reduced, and the turbulence phenomenon is avoided.
Has the advantages that:
the utility model provides a smokeless hot pot is air exhauster for table passes through the root circle and the top circle diameter size of wind wheel blade quantity, the circular arc radius of wind wheel blade windward side, wind wheel blade, the length and the reasonable adjustment of motor speed parameter of windward side circular arc center place circle diameter size and wind wheel of all wind wheel blades to make oil smoke, steam and air behind the wind wheel, separation that can be better, and this smokeless hot pot is small in noise of air exhauster for table.
Drawings
Fig. 1 is a perspective view of the present invention;
fig. 2 is a side view of the present invention;
fig. 3 is a top view of the present invention;
fig. 4 is a schematic view of a wind turbine blade according to the present invention;
labeled as: the wind turbine comprises a wind wheel 1, a web plate 2, a shaft sleeve 21, a noise reduction hole 22, a wind wheel blade 3 and a windward side 31.
Detailed Description
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1-4: the utility model provides an exhaust fan for a smokeless hot pot table, which comprises a shell and a wind wheel 1 arranged in the shell through a motor, wherein the wind wheel 1 is of a cylindrical bidirectional air inlet structure, the wall of the wind wheel 1 extends inwards and is provided with a plurality of wind wheel blades 3 distributed circumferentially, an arc-shaped web plate 2 is arranged in the middle of the wind wheel 1, the wind wheel 1 is fixedly connected to an output shaft of the motor through a shaft sleeve 21 at the central position of the web plate 2, and a noise reduction hole 22 is also formed in the web plate 2; the wind wheel blades 3 are axially divided into two sections along the wind wheel 1, the two sections of wind wheel blades 3 are alternately arranged along the circumferential direction, the number of the two sections of wind wheel blades is equal, and the two sections of wind wheel blades 3 are 55-65; the windward side 31 and the flow guide surface of the wind wheel blade 3 are both arc-shaped, the windward side 31 is arc-shaped with the radius of 17-20 mm, the root circle diameter D of the wind wheel blade 3 is 145-152 mm, and the top circle diameter D' of the wind wheel blade 3 is 125-130 mm; and the diameter D' of the circle where the arc centers of the windward sides 31 of all the wind wheel blades 3 are located is 120-125 mm; the length H of the wind wheel 1 is 145-150 mm; the rotating speed of the motor is 1500 r/min-1700 r/min.
The utility model provides an exhaust fan for a smokeless hot pot table, which comprises a shell and a wind wheel 1, wherein the shell is provided with two air inlets, each air inlet is provided with a net-shaped air inlet cover, and one net-shaped air inlet cover is provided with an installation structure for installing a motor; the middle part of wind wheel 1 is equipped with arc web 2, and wind wheel 1 passes through the axle sleeve fixed connection of the central point of web 2 and puts on the output shaft of motor. The wind wheel 1 is limited by parameters such as diameter, length, number, shape and arrangement mode of blades and divided into two sections of circumferentially staggered arrangement modes in the length direction, so that the wind wheel 1 has the characteristics of large air volume, strong suction, high structural strength, long service life and low noise under the working condition of high rotating speed; the matching of the high-speed motors ensures that the mixed gas of oil fume, water vapor and air in the peripheral range of the hot pot table can be completely sucked by the fan, and the oil and water of the mixed gas are separated from the air to form liquid water and oil and purified air through the dual actions of high-speed impact and centrifugal separation of the windward side 31 of the wind wheel blade 3, and the oil and the water are thrown on the inner wall of the fan shell by the wind wheel blade under the action of centrifugal force and then flow downwards under the action of gravity so as to be intensively treated; the air is discharged through the wind channel after purifying, even return and arrange in the chafing dish table periphery, can not constitute the air pollution to the environment of having a dinner. The wind wheel blades 31 are arranged in a segmented and staggered manner, so that the resonance phenomenon of the wind wheel 1 can be reduced, and the motion balance characteristic is improved; the noise reduction hole is used as a side with lower negative pressure and a side with higher negative pressure to supplement mixed gas, so that the negative pressure on two sides of the web plate 2 is balanced, and the noise is reduced. The quantity of the blades, the diameter D of the root circle, the diameter D 'of the top circle, the radius of the cambered surface and the diameter D' of the circle where the radius of the cambered surface is located are basic parameters of the blades, and the effect that oil water and air are basically and completely separated can be achieved by matching the rotating speed which is only doubled compared with the prior art. Reasonable selection of all the parameters requires a large amount of theoretical calculation and experimental verification, and is finally determined after multiple modifications; the blade parameters, the length of the wind wheel and the rotating speed of the motor jointly determine the rated air volume of the fan so as to meet the requirement of the air draft volume under the condition of multi-user use. Experiments prove that the performance indexes of the fan such as the suction rate (95%), the purification rate (98%), the working noise (less than or equal to 55 decibels) and the like for the mixed gas of the smoke of the chafing dish are obviously improved compared with the existing smokeless chafing dish table.
Wherein, the windward side 31 is in the shape of an arc with the radius of 18mm, the diameter D of the root circle of the wind wheel blade 3 is 150mm, the diameter D 'of the top circle of the wind wheel blade 3 is 128mm, and the diameter D' of the circle where the centers of the arcs of the windward sides 31 of all the wind wheel blades 3 are located is 123 mm; the length H of the wind rotor 1 is 148 mm. Through optimizing and matching the circular arc radius of the windward side 31 of the wind wheel blades 3, the diameters of the root circle and the top circle of the wind wheel blades 3, the diameter of the circle where the center of the windward side circular arc of all the wind wheel blades is located and the length of the wind wheel, the structural parameters are more reasonable, the oil smoke and air separation effect is better, and the operation noise is lower.
Wherein the rotating speed of the motor is 1600 r/min. Through further limiting the rotating speed, the effect of better combination of the pumping rate and the noise is obtained.
Wherein the number of the two segments of wind turbine blades 3 is 60. So as to obtain better comprehensive performance.
Wherein, the part of the wind wheel blade 3 close to the wind wheel cylinder opening is transited from the blade top to the blade root through an arc. Therefore, the wind resistance can be reduced, the smooth inflow of air is facilitated, and the operation noise is reduced.
Wherein, the part of the wind wheel blade 3 close to the web 2 gradually increases the blade width through the arc-shaped extension section extending towards the middle part of the wind wheel 1. Therefore, the structural strength of the wind wheel blades 3 and the web 2 can be enhanced, the service life is prolonged, resonance is reduced or eliminated, and the operation noise is reduced.
The noise reduction holes 22 are quadrilateral holes formed by intersecting fan shapes and annular belts. The resistance of air circulation is reduced, the smooth air circulation is facilitated, and the noise is reduced.
Wherein, a plurality of the noise reduction holes 22 are uniformly distributed on the circumference of the web 2. Reduce turbine phenomenon, the noise reduction effect is better.
Wherein, the output shaft of the motor penetrates from the concave side of the arc-shaped web 2 to the convex side. Therefore, the situation that the mixed gas is supplemented to the lateral concave side of the convex surface through the noise reduction holes to form a channel for air flowing is reduced, and the turbulence phenomenon is avoided.
In the embodiment, the arc radius of the windward surface 31 of the wind wheel blade 3 can also be selected from any value of 17 mm-20 mm except 18 mm; the root diameter D of the wind wheel blade 3 can also be selected from any value of 145-152 mm except 150 mm; the diameter D' of the top circle of the wind wheel blade 3 can also be any value except 128mm in 125 mm-130 mm; the diameter D' of the circle where the arc centers of the windward sides 31 of all the wind wheel blades 3 are positioned can also be any value except 123mm in the range of 120 mm-125 mm; the length H of the wind wheel 1 can be selected from any value of 145 mm-150 mm except 148 mm.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the technical scope of the present invention, and the technical scope of the present invention is also considered to fall into the scope of the claims.
Claims (9)
1. An exhaust fan for a smokeless hot pot table comprises a shell and a wind wheel (1) arranged in the shell through a motor, wherein the wind wheel (1) is of a cylindrical bidirectional air inlet structure, the wall of the wind wheel (1) extends inwards and is provided with a plurality of wind wheel blades (3) distributed circumferentially, an arc-shaped web plate (2) is arranged in the middle of the wind wheel (1), the wind wheel (1) is fixedly connected to an output shaft of the motor through a shaft sleeve (21) in the center of the web plate (2), and a noise reduction hole (22) is formed in the web plate (2); the wind wheel is characterized in that the wind wheel blades (3) are axially divided into two sections along the wind wheel (1), the two sections of wind wheel blades (3) are alternately arranged along the circumferential direction, the number of the two sections of wind wheel blades is equal, and the two sections of wind wheel blades are 55-65; the windward side (31) and the flow guide surface of the wind wheel blade (3) are both arc-shaped, the windward side (31) is arc-shaped with the radius of 17-20 mm, the root circle diameter D of the wind wheel blade (3) is 145-152 mm, and the top circle diameter D' of the wind wheel blade (3) is 125-130 mm; and the diameter D' of the circle where the arc centers of the windward sides (31) of all the wind wheel blades (3) are located is 120-125 mm; the length H of the wind wheel (1) is 145-150 mm; the rotating speed of the motor is 1500 r/min-1700 r/min.
2. The smokeless hot pot table exhaust fan according to claim 1, wherein the windward side (31) is in the shape of a circular arc with a radius of 18mm, the root circle diameter D of the wind wheel blade (3) is 150mm, the top circle diameter D 'of the wind wheel blade (3) is 128mm, and the circle diameter D' of the arc centers of the windward sides (31) of all the wind wheel blades (3) is 123 mm; the length H of the wind wheel (1) is 148 mm.
3. The smokeless hot pot table exhaust fan according to claim 1, wherein the rotation speed of the motor is 1600 r/min.
4. The smokeless hot pot table exhaust fan according to claim 1, characterized in that the number of the two segments of wind wheel blades (3) is 60.
5. The smokeless hot pot table exhaust fan according to claim 1, characterized in that the part of the wind wheel blade (3) close to the wind wheel barrel mouth transitions from the blade top to the blade root through an arc.
6. The smokeless hot pot table exhaust fan according to claim 1, characterized in that the part of the wind wheel blade (3) close to the web (2) gradually increases the blade width through a circular arc-shaped extension section extending to the middle of the wind wheel (1).
7. The smokeless hot pot table exhaust fan according to claim 1, characterized in that the noise reduction holes (22) are quadrilateral holes formed by intersecting fan-shaped and annular belt-shaped holes.
8. The exhaust fan for the smokeless hot pot table according to claim 7, wherein a plurality of the noise reduction holes (22) are uniformly distributed on the circumference of the web (2).
9. The extractor for the smokeless hot pot table according to any one of claims 1 to 8, wherein the output shaft of the motor penetrates from the concave side to the convex side of the arc-shaped web (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921527920.3U CN211082376U (en) | 2019-09-12 | 2019-09-12 | Smoke-free hot pot table exhaust fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921527920.3U CN211082376U (en) | 2019-09-12 | 2019-09-12 | Smoke-free hot pot table exhaust fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211082376U true CN211082376U (en) | 2020-07-24 |
Family
ID=71631897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921527920.3U Active CN211082376U (en) | 2019-09-12 | 2019-09-12 | Smoke-free hot pot table exhaust fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211082376U (en) |
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2019
- 2019-09-12 CN CN201921527920.3U patent/CN211082376U/en active Active
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