CN210013829U - Laminar flow fan - Google Patents

Abstract

The utility model provides a laminar flow fan. Wherein laminar flow fan includes: the annular disks are arranged in parallel at intervals and have the same central axis, the number of the annular disks is 8-16, and the distance between every two adjacent annular disks is 8 mm-17 mm; and the motor is configured to drive the plurality of annular disks to rotate so as to enable the plurality of annular disks to be in contact with air between the plurality of annular disks and move mutually, and further enable the air boundary layer close to the surfaces of the plurality of annular disks to be driven by the plurality of annular disks which rotate due to the viscous effect to rotate from inside to outside so as to form laminar air. The utility model discloses a laminar flow fan, compromise laminar flow fan's the volume occupied and the quantity and the interval that the amount of wind set up the ring plate, and realize the laminar flow air supply through the viscidity effect, reduce traditional fan and can not increase the requirement that the blade can satisfy the amount of wind even to the use of blade, air supply process noise is little, the amount of wind is high, effectively promotes user's use and experiences.

Description

Laminar flow fan

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a laminar flow fan.

Background

With the development of society and the increasing living standard of people, various air conditioning devices have become one of the indispensable electrical devices in people's daily life. Various air conditioning devices can help people to reach a temperature that can be adapted to when the ambient temperature is too high or too low.

The current air conditioning devices mainly include various types of air conditioners and fans, but most users consider that hot air or cold air generated by the current air conditioners is unevenly distributed in a room or a closed space, and has certain distribution limitations. In addition, fans used in indoor units of air conditioners are mainly centrifugal fans and cross-flow fans. However, the centrifugal fan and the cross flow fan have the following problems: the centrifugal fan has high noise because the wind pressure and the wind volume are improved by dozens of large-volume blades, and when the centrifugal fan is used for a vertical air conditioner, the air needs to be bent in two directions of 90 degrees from the air entering the centrifugal fan to the air being sent out of the air conditioner, and the wind loss is caused when the air is bent in each direction; although the noise of the cross flow fan is low, the wind pressure is too small, and the air supply distance is short. And the whole volume of the cross flow fan is large, and the actual effective volume is small, so that the space waste is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a laminar flow fan that the noise is little, the amount of wind is high.

The utility model discloses a further purpose makes laminar flow fan realize 360 air supplies, avoids the air-out to blow directly the user, promotes user's use and experiences.

In particular, the utility model provides a laminar flow fan, include: the annular disks are arranged in parallel at intervals and have the same central axis, the number of the annular disks is 8-16, and the distance between every two adjacent annular disks is 8 mm-17 mm; and the motor is configured to drive the plurality of annular disks to rotate so as to enable the plurality of annular disks to be in contact with air between the plurality of annular disks and move mutually, and further enable the air boundary layer close to the surfaces of the plurality of annular disks to be driven by the plurality of annular disks which rotate due to the viscous effect to rotate from inside to outside so as to form laminar air.

Optionally, the number of the plurality of annular disks is 8 or 9, and the distance between two adjacent annular disks is 13.5 mm to 14 mm.

Optionally, the laminar flow fan further comprises: the single circular disk is arranged above the plurality of annular disks in parallel at intervals, and the motor is fixedly arranged above the circular disks.

Optionally, the laminar flow fan further comprises: and the connecting rod penetrates through the circular disk and the annular disks to connect the annular disks to the circular disk.

Optionally, the electric machine is further configured to: the circular disk is directly driven to rotate, and then the circular disk drives the plurality of annular disks to rotate.

Optionally, the centers of the plurality of annular disks are jointly formed with an air inlet channel so as to enable air outside the laminar flow fan to enter; a plurality of air outlets are formed in gaps among the annular disks so as to blow laminar air out.

Optionally, the plurality of annular disks are all planar disks; the lower surface of the circular disk has an inverted conical protrusion to direct the flow of air entering the laminar flow fan and assist in creating laminar air flow.

Optionally, the radius of the circular disk is the same as the outer diameter of the plurality of annular disks.

Optionally, the connecting rods are multiple and penetrate through the edge parts of the circular disk and the annular disks at uniform intervals.

Optionally, the electric machine is further configured to: the rotating speed of the motor is determined according to the obtained target air volume of the laminar flow fan, and the rotating speed and the target air volume are in a linear relation.

The utility model discloses a laminar flow fan, include: the annular disks are arranged in parallel at intervals and have the same central axis, the number of the annular disks is 8-16, and the distance between every two adjacent annular disks is 8-17 mm; and the motor is configured to drive the plurality of annular disks to rotate so as to enable the plurality of annular disks to be in contact with air between the plurality of annular disks and move mutually, and further enable the air boundary layer close to the surfaces of the plurality of annular disks to be driven by the plurality of annular disks which rotate due to the viscous effect to rotate from inside to outside so as to form laminar air. As the number of the annular disks increases, the air quantity of the laminar flow fan gradually rises. However, in order to avoid the overlarge volume of the laminar flow fan, the number of the annular disks and the distance between two adjacent annular disks are constrained to a certain extent, the number of the annular disks can be set to be 8 to 16, and the distance between two adjacent annular disks is 8 mm to 17 mm in a matching manner, so that the air volume can be effectively increased under the condition that the integral thickness of the laminar flow fan is limited, and the air outlet of the laminar flow fan meets the use requirements of users. In addition, laminar flow fan realizes the laminar flow air supply through the viscidity effect, reduces traditional fan and can not increase the requirement that the blade can satisfy the amount of wind even to the use of blade, and air supply process noise is little, the amount of wind is high, effectively promotes user's use and experiences.

Further, the utility model discloses a laminar flow fan still includes: the single circular disk is arranged above the plurality of annular disks in parallel at intervals, and the motor is fixedly arranged above the circular disks. And the connecting rod penetrates through the circular disk and the annular disks to connect the annular disks to the circular disk. The electric machine is further configured to: the circular disk is directly driven to rotate, and then the circular disk drives the plurality of annular disks to rotate. The centers of the plurality of annular disks are jointly formed with an air inlet channel so as to enable air outside the laminar flow fan to enter. A plurality of air outlets are formed in gaps among the annular disks so as to blow laminar air out. After laminar air is blown out through the plurality of air outlets, air outside the laminar flow fan is pressed into the annular disc through the air inlet due to the action of pressure difference, and the circulation is repeated, so that laminar air circulation is formed. A plurality of air outlets formed by the gaps among the plurality of annular disks can enable the laminar flow fan to realize 360-degree air supply, various uncomfortable symptoms caused by direct blowing of air supplied by an air conditioner by a user are avoided, and the use experience of the user is further improved.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic diagram of a prior art centrifugal fan;

fig. 2 is a schematic view of an overall structure of a laminar flow fan according to an embodiment of the present invention;

FIG. 3 is a schematic view of the laminar flow fan shown in FIG. 2 from another perspective;

FIG. 4 is a schematic view of the laminar flow fan shown in FIG. 2;

fig. 5 is a schematic diagram of an air supply principle of a laminar flow fan according to an embodiment of the present invention;

fig. 6 is a velocity profile and force profile of a laminar flow fan according to an embodiment of the present invention;

fig. 7 is a schematic air circulation diagram of a laminar flow fan according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating the relationship between the number of annular disks and the air volume and the air pressure of the laminar flow fan according to an embodiment of the present invention;

fig. 9 is a schematic diagram illustrating a relationship between a distance between annular disks and an air volume and an air pressure of a laminar flow fan according to an embodiment of the present invention; and

fig. 10 is a schematic diagram illustrating a relationship between a motor rotation speed and an air volume and an air pressure of a laminar flow fan according to an embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic diagram of an air supply of a centrifugal fan 200 in the prior art. Two arrows in fig. 1 show the air flowing direction of the centrifugal fan 200 during the air supply process when applied to the floor air conditioner, and the centrifugal fan 200 in the prior art needs to make two 90 ° turns from the air inlet to the air outlet during the whole process when applied to the floor air conditioner, and each turn is accompanied by a large air loss. In addition, the centrifugal fan 200 generally requires several tens of large-sized blades to increase wind pressure and wind volume, and the blades rotate to rub or impact air when the centrifugal fan 200 operates. Since the centrifugal fan 200 has wide blades and a large thickness, a very large noise is generated when the motor of the centrifugal fan 200 is operated at a high speed. In addition, a cross-flow fan is commonly used in the prior art, but although the noise of the cross-flow fan is low, the wind pressure is too small, and the air supply distance is short; and the whole volume of the cross flow fan is large, and the actual effective volume is small, so that the space waste is caused. The embodiment provides a laminar flow fan 100, can reduce the use of traditional fan to the blade and can not increase the requirement that the blade can satisfy the amount of wind even, and air supply process noise is little, the amount of wind is high, effectively promotes user's use and experiences. Fig. 2 is a schematic overall structure diagram of a laminar flow fan 100 according to an embodiment of the present invention, fig. 3 is a schematic overall structure diagram of another view angle of the laminar flow fan 100 in fig. 2, and fig. 4 is a schematic overall structure diagram of another view angle of the laminar flow fan 100 in fig. 2. As shown in fig. 2 to 4, the laminar flow fan 100 of the present embodiment may generally include: a plurality of annular disks 10 and a motor 20.

The plurality of annular disks 10 may be arranged in parallel at intervals, and have the same central axis, the number of the plurality of annular disks 10 is 8 to 16, and the distance between two adjacent annular disks 10 is 8 mm to 17 mm. The laminar flow fan 100 of the present embodiment can be used not only alone for supplying air, but also, more importantly, can be applied to indoor units of various types of air conditioners, such as an upright air conditioner, a wall-mounted air conditioner, and the like. Although the inventor finds out through a plurality of experiments that the air quantity of the laminar flow fan gradually rises as the number of the annular disks increases. However, considering the limited space inside the indoor unit of the air conditioner, there is a certain constraint on the number of the ring disks 10 of the laminar fan 100 and the distance between two adjacent ring disks. In consideration of the fact that the thickness of the laminar flow fan 100 is not too large, the number of the annular disks 10 is constrained to be 8 to 16, and the distance between two adjacent annular disks 10 is 8 mm to 17 mm, so that the maximum air volume blown out by the laminar flow fan 100 can be ensured, and the air supply requirement of a user can be effectively met. In a preferred embodiment, the number of the plurality of annular disks is 8 or 9, and the spacing between two adjacent annular disks is 13.5 mm to 14 mm. In a more preferred embodiment, the number of the annular disks 10 may be set to 8, and the spacing between two adjacent annular disks 10 may be set to 13.75 mm.

The motor 20 may be configured to drive the plurality of annular disks 10 to rotate, so that the plurality of annular disks 10 contact with each other and move with each other, and the air boundary layer 13 near the surfaces of the plurality of annular disks 10 is driven by the plurality of annular disks 10 rotating due to the viscous effect to rotate from inside to outside to form a laminar air flow. The air boundary layer 13 is a very thin layer of air adjacent to the surface of each disk. The laminar flow fan 100 may further include: a single circular disk 30 and a connecting rod 40. Wherein the circular disks 30 may be spaced apart and arranged in parallel above the plurality of annular disks 10, and the motor 20 is fixedly arranged above the circular disks 30. Tie rods 40 may extend through circular disk 30 and plurality of annular disks 10 to connect plurality of annular disks 10 to circular disk 30. The motor 20 may also be configured to: the circular disk 30 is directly driven to rotate, and the circular disk 30 drives the plurality of annular disks 10 to rotate. That is, the motor 20 configured to rotate the plurality of annular discs 10 is dependent on the motor 20 first rotating the circular discs 30 and then rotating the plurality of annular discs 10 by the circular discs 30. In a specific embodiment, the radius of the circular disk 30 is the same as the outer diameter of the plurality of annular disks 10, and may be set to 170 mm to 180 mm, so as to constrain the horizontal occupied volume of the laminar flow fan 100, cooperatively define the number of annular disks 10 and the distance between two adjacent annular disks 10, and constrain the longitudinal thickness of the laminar flow fan 100, so as to effectively constrain the overall occupied volume of the laminar flow fan 100. Note that, the inner diameter of the annular disk 10 refers to the radius of its inner circumference; the outer diameter refers to the radius of its outer circumference.

In a preferred embodiment, the connecting rods 40 are plural and uniformly spaced throughout the edge portions of the circular disks 30 and the plurality of annular disks 10. The connecting rods 40 uniformly penetrate through the edge portions of the circular disk 30 and the annular disks 10 at intervals, so that the connection relationship between the circular disk 30 and the annular disks 10 can be ensured to be stable, and further, when the motor 20 drives the circular disk 30 to rotate, the circular disk 30 can stably drive the annular disks 10 to rotate, thereby improving the working reliability of the laminar flow fan 100.

Fig. 5 is a schematic diagram illustrating an air supply principle of the laminar flow fan 100 according to an embodiment of the present invention, and fig. 6 is a speed distribution and a force distribution diagram of the laminar flow fan 100 according to an embodiment of the present invention. The blowing principle of the laminar flow fan 100 is derived primarily from the "tesla turbine" found in nigula tesla. Tesla turbines mainly utilize the 'laminar boundary layer effect' or 'viscous effect' of the fluid to achieve the purpose of doing work on 'turbine disks'. The laminar flow fan 100 of this embodiment drives the circular disk 30 and the disk drives the plurality of annular disks 10 to rotate at a high speed through the motor 20, and the air in the disk intervals contacts and moves with each other, so that the air boundary layer 13 near the surface of each disk is driven by the rotating disk to rotate from inside to outside under the action of the viscous shear force τ to form laminar flow wind.

Fig. 6 shows a schematic diagram of the viscous shear force distribution τ (y) and velocity distribution u (y) to which the air boundary layer 13 is subjected. The viscous shear forces experienced by the air boundary layer 13 are actually the drag forces that the individual disks create against the air boundary layer 13. The axis of abscissa in fig. 6 refers to the distance in the moving direction of the air boundary layer 13, and the axis of ordinate refers to the height of the air boundary layer 13 in the direction perpendicular to the moving direction. v. of_eThe air flow velocity at each point in the air boundary layer 13, δ being the thickness of the air boundary layer 13, τ_wIs a viscous shear force at the surface of the annular disc 10. The variable y in τ (y) and u (y) refers to the height of the cross-section of the boundary layer 13 in the direction perpendicular to the direction of movement, and L is the distance between a point on the inner circumference of the annular disk 10 and a point on the surface of the annular disk 10.τ (y) is the distribution of viscous shear forces experienced at this distance L at a cross-sectional height y of the boundary layer 13 of air; u (y) is the velocity profile at this distance L for a cross-section of the air boundary layer 13 having a height y.

Fig. 7 is an air circulation diagram of the laminar flow fan 100 according to an embodiment of the present invention. As shown in fig. 2 to 4 and 7, an air inlet channel 11 is formed at the center of the plurality of annular disks 10 to allow air outside the laminar flow fan 100 to enter. A plurality of air outlets 12 are formed in gaps between the plurality of annular disks 10 to allow laminar air to be blown out. The process of the laminar wind formed by the air boundary layer 13 rotating from inside to outside is centrifugal motion, so that the speed of the laminar wind leaving the air outlet 12 is higher than that of the laminar wind entering the air inlet channel 11. The spacing between each two adjacent annular disks 10 in the plurality of annular disks 10 of the present embodiment may be the same, that is, the plurality of annular disks 10 are arranged in parallel at the same spacing. The plurality of air outlets 12 formed by the gaps between the plurality of annular disks 10 can enable the laminar flow fan 100 to uniformly supply air at 360 degrees, so that various uncomfortable symptoms caused by direct blowing of air supplied by an air conditioner by a user are avoided, and the use experience of the user is further improved.

The plurality of annular disks 10 may each be planar disks and in a preferred embodiment, the lower surface of the circular disk 30 has an inverted conical protrusion 31 to guide the air flow entering the laminar flow fan 100 and assist in forming laminar air flow. The upper surface of circular disk 30 may be a plane, and circular disk 30 mainly functions to fixedly receive motor 20 and is connected to a plurality of annular disks 10 through connecting rod 40, so as to drive a plurality of annular disks 10 to rotate when motor 20 drives circular disk 30 to rotate. The inverted conical protrusion 31 on the lower surface of the circular disk 30 can effectively guide the air entering the laminar flow fan 100 through the air inlet channel 11 to enter the gap between the disks, thereby improving the efficiency of forming laminar flow air.

Fig. 8 is a schematic diagram illustrating the relationship between the number of the ring-shaped disks 10 and the air volume and the air pressure of the laminar flow fan 100 according to an embodiment of the present invention. Wherein, the abscissa axis Number of the disks refers to the Number of the annular disks 10, the left ordinate axis Mass flow rate refers to the air volume, the right ordinate axis Pressure refers to the air Pressure, and the air Pressure refers to the Pressure difference between the air outlet 12 of the laminar flow fan 100 and the inlet of the air inlet channel 11. Specifically, fig. 8 is a schematic diagram illustrating the relationship between the number of the ring disks 10 and the air volume and the air pressure when the outer diameter, the inner diameter, the distance, the thickness of the ring disks 10 and the rotation speed of the motor 20 of the laminar flow fan 100 are all kept constant. As shown in fig. 8, when the above-mentioned parameters are all kept constant, the change of the number of the ring disks 10 has a large influence on the air volume, a small influence on the air pressure, and the air volume gradually increases as the number of the ring disks 10 increases. With the thickness of the laminar flow fan 100 allowed, a larger air volume can be obtained by increasing the number of layers of the annular disk 10. In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the inner diameter of the annular disk 10 is 115mm, the pitch of the annular disks 10 is 13.75 mm, the thickness of the annular disk 10 is 2 mm, and the rotation speed of the motor 20 is 1000rpm (revolutions per minute), and at this time, the number of the annular disks 10 may be set to 8 layers in consideration of the overall thickness and the air volume of the laminar flow fan 100.

Fig. 9 is a schematic diagram illustrating a relationship between an interval of the ring-shaped disks 10 and an air volume and an air pressure of the laminar flow fan 100 according to an embodiment of the present invention. Wherein the spacing between the annular disks 10 refers to the spacing between two adjacent annular disks 10. In fig. 9, the abscissa axis plant distance refers to the pitch of the ring disks 10, the left ordinate axis Mass flow rate refers to the air volume, and the right ordinate axis Pressure refers to the air Pressure. Specifically, fig. 9 is a schematic diagram illustrating the relationship between the pitch of the annular disks 10 and the air volume and the air pressure when the outer diameter, the inner diameter, the number, the thickness of the annular disks 10 and the rotation speed of the motor 20 of the laminar flow fan 100 are all kept constant. As shown in fig. 9, when the above parameters are all kept unchanged, the change of the pitch of the annular disk 10 has a large influence on the air volume and a small influence on the air pressure. When the distance between the annular disks 10 is increased from 9.75mm to 11.75mm, the air quantity is greatly improved; the distance between the annular disks 10 is continuously increased, and the air quantity stably rises. The wind pressure is smaller as the distance between the annular discs 10 is larger; even negative wind pressure occurred at a pitch of 17.75mm between the annular disks 10. In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the inner diameter of the annular disk 10 is 115mm, the number of the annular disks 10 is 8, the thickness of the annular disk 10 is 2 mm, and the rotation speed of the motor 20 is 1000rpm (revolutions per minute), and at this time, the distance between two adjacent annular disks 10 may be set to 13.75 mm by comprehensively considering the overall thickness, the air volume and the air pressure of the laminar flow fan 100.

Fig. 10 is a schematic diagram illustrating the relationship between the rotation speed of the motor 20 of the laminar flow fan 100 and the air volume and the air pressure according to an embodiment of the present invention. Wherein the abscissa axis Speed of revolution refers to the rotational Speed of the motor 20, the left ordinate axis Massflow rate refers to the air volume, and the right ordinate axis Pressure refers to the air Pressure. Specifically, fig. 10 is a schematic diagram illustrating the relationship between the rotation speed of the motor 20 and the air volume and the air pressure when the outer diameter, the inner diameter, the number of layers, the distance, and the thickness of the annular disk 10 of the laminar flow fan 100 are all kept constant. As shown in fig. 10, when the above mentioned parameters are kept constant, the air volume increases substantially linearly with the increase of the rotation speed of the motor 20, but the increase of the speed tends to be slow, and the increase of the air pressure is not substantially changed. In a preferred embodiment, when the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the inner diameter of the annular disk 10 is 115mm, the number of the annular disks 10 is 8, the pitch of the annular disks 10 is 13.75 mm, and the thickness of the annular disk 10 is 2 mm, the linear relationship between the rotation speed of the motor 20 and the air volume of the laminar flow fan 100 is more obvious.

Since the rotation speed of the motor 20 and the air volume of the laminar flow fan 100 are substantially linear, in a preferred embodiment, the motor 20 can be further configured to: the rotation speed of the motor 20 is determined according to the acquired target air volume of the laminar flow fan 100. That is, the target air volume of the laminar flow fan 100 may be first obtained, and then the rotation speed of the motor 20 may be determined according to a linear relationship between the target air volume and the rotation speed of the motor 20. The target air volume may be obtained by an input operation of the user.

The laminar flow fan 100 of the present embodiment includes: the annular disks 10 are arranged in parallel at intervals, have the same central axis, the number of the annular disks 10 is 8 to 16, and the distance between two adjacent annular disks 10 is 8 mm to 17 mm; and a motor 20 configured to drive the plurality of annular disks 10 to rotate, so that the plurality of annular disks 10 contact with each other and move with each other, and further, the air boundary layer 13 close to the surfaces of the plurality of annular disks 10 is driven by the plurality of annular disks 10 rotating due to the viscous effect to rotate from inside to outside to form laminar air. As the number of the ring disks 10 increases, the air volume of the laminar flow fan 100 gradually increases. However, in order to avoid the overlarge volume of the laminar flow fan 100, the number of the annular disks 10 and the distance between two adjacent annular disks 10 are constrained to a certain extent, the number of the plurality of annular disks 10 may be set to be 8 to 16, and the distances between two adjacent annular disks 10 are both 8 mm to 17 mm in a matching manner, so that the air volume can be effectively increased under the condition that the integral thickness of the laminar flow fan 100 is limited, and the air outlet of the laminar flow fan 100 is ensured to meet the use requirements of users. In addition, laminar flow fan 100 realizes the laminar flow air supply through the viscidity effect, reduces the use of traditional fan to the blade and can satisfy the requirement of the amount of wind even can not increase the blade, and air supply process noise is little, the amount of wind is high, effectively promotes user's use and experiences.

Further, the laminar flow fan 100 of the present embodiment further includes: the single circular disks 30 are arranged above the plurality of annular disks 10 in parallel at intervals, and the motor 20 is fixedly arranged above the circular disks 30. And a connecting rod 40 penetrating the circular disk 30 and the plurality of annular disks 10 to connect the plurality of annular disks 10 to the circular disk 30. The motor 20 is further configured to: the circular disk 30 is directly driven to rotate, and the circular disk 30 drives the plurality of annular disks 10 to rotate. The centers of the plurality of annular disks 10 are collectively formed with an air intake passage 11 to allow air outside the laminar flow fan 100 to enter. A plurality of air outlets 12 are formed in gaps between the plurality of annular disks 10 to allow laminar air to be blown out. After the laminar air is blown out through the plurality of air outlets 12, the air outside the laminar fan 100 is forced into the annular disk 10 through the air inlet due to the pressure difference, and the circulation is repeated, so that laminar air circulation is formed. The plurality of air outlets 12 formed by the gaps between the plurality of annular disks 10 can enable the laminar flow fan 100 to realize 360-degree air supply, so that various uncomfortable symptoms caused by direct blowing of air supplied by an air conditioner by a user are avoided, and the use experience of the user is further improved.

It should be understood by those skilled in the art that, without specific description, terms used to represent orientations or positional relationships in the embodiments of the present invention such as "upper," "lower," "left," "right," "front," "rear," and the like are used with reference to the actual usage state of the laminar flow fan 100, and these terms are only used for convenience of description and understanding of the technical solution of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore, should not be construed as limiting the present invention.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A laminar flow fan, comprising:

the annular disks are arranged in parallel at intervals and have the same central axis, the number of the annular disks is 8-16, and the distance between every two adjacent annular disks is 8 mm-17 mm; and

and the motor is configured to drive the plurality of annular discs to rotate, so that the plurality of annular discs are in contact with air among each other and move mutually, and further, an air boundary layer close to the surfaces of the plurality of annular discs is driven by the plurality of annular discs which rotate due to a viscous effect to rotate from inside to outside to form laminar wind.

2. The laminar flow fan according to claim 1,

the number of the annular disks is 8 or 9, and the distance between every two adjacent annular disks is 13.5 mm-14 mm.

3. The laminar flow fan according to claim 1, further comprising:

a single circular disk, which is arranged above the annular disks in parallel at intervals, and

the motor is fixedly arranged above the circular disk.

4. The laminar flow fan according to claim 3, characterized by further comprising:

a connecting rod penetrating the circular disk and the plurality of annular disks to connect the plurality of annular disks to the circular disk.

5. The laminar flow fan according to claim 4, wherein the motor is further configured to:

the circular disk is directly driven to rotate, and the circular disk drives the annular disks to rotate.

6. The laminar flow fan according to claim 1,

the centers of the plurality of annular disks jointly form an air inlet channel so as to enable air outside the laminar flow fan to enter;

and a plurality of air outlets are formed in gaps among the annular disks for blowing out laminar air.

7. The laminar flow fan according to claim 3,

the plurality of annular disks are all planar disks;

the lower surface of the circular disk has an inverted conical protrusion to guide the flow of air entering the laminar flow fan and assist in forming the laminar flow wind.

8. The laminar flow fan according to claim 3,

the radius of the circular disk is the same as the outer diameter of the plurality of annular disks.

9. The laminar flow fan according to claim 4,

the connecting rods are multiple and penetrate through the edge parts of the circular disks and the annular disks at even intervals.

10. The laminar flow fan according to claim 1, wherein the motor is further configured to:

the rotating speed of the motor is determined according to the obtained target air volume of the laminar flow fan, and the rotating speed and the target air volume are in a linear relation.

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