Laminar flow fan

Abstract

The present invention provides a laminar flow fan. The laminar flow fan includes: a plurality of annular discs, which are arranged in parallel with each other and have the same central axis; a circular disc, the center of which is formed with a hub facing the plurality of annular discs, and a groove is defined inside the hub; a connecting plate, which connects the plurality of annular discs to the circular disc; a motor is provided in the groove, which directly drives the circular disc to rotate, and then the circular disc drives the plurality of annular discs to rotate, so as to form laminar wind by utilizing the viscous effect; a plurality of centrifugal blades perpendicular to the annular discs are provided on the outer side of the peripheral wall of the hub, which are configured to accelerate the air flow to between the plurality of annular discs when rotating. The laminar flow fan of the present invention realizes laminar air supply through the viscous effect, and the air supply process has low noise and high air volume; the centrifugal blades increase the air volume entering the laminar flow fan, thereby improving the working efficiency of the laminar flow fan, and the outer annular discs can effectively block the noise generated by the centrifugal blades in the middle.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, in particular to a laminar flow fan. Background Art

[0002] With the development of society and the continuous improvement of people's living standards, various air conditioning devices have become one of the indispensable electrical equipment in people's daily lives. Various air conditioning devices can help people reach a temperature they can adapt to when the ambient temperature is too high or too low.

[0003] Current air conditioning systems primarily include various types of air conditioners and fans. However, most users believe that the hot or cold air generated by current air conditioners is unevenly distributed within a room or enclosed space, resulting in limited distribution. Furthermore, the fans used in indoor air conditioner units are primarily centrifugal and cross-flow fans. However, these fans present several challenges: Because they require dozens of large blades to increase air pressure and volume, they are noisy. Furthermore, when used in vertical air conditioners, air must make two 90-degree turns between entering the fan and exiting, resulting in air volume loss with each turn. While cross-flow fans offer lower noise levels, they also have low air pressure and a short air delivery distance. Furthermore, cross-flow fans are bulky overall, but their effective volume is small, resulting in wasted space. Furthermore, the heat generated by these fans is difficult to dissipate during operation, often affecting the efficiency of the motor. Summary of the Invention

[0004] An object of the present invention is to provide a laminar flow fan with low noise and high air volume.

[0005] A further object of the present invention is to dissipate the heat of the laminar flow fan motor in a timely manner and improve the working efficiency of the laminar flow fan.

[0006] In particular, the present invention provides a laminar fan, comprising: a plurality of annular discs, arranged in parallel with each other at intervals and having the same central axis; circular discs, arranged in parallel with intervals on one side of the plurality of annular discs, and a hub is formed with the center of the circular disc facing the plurality of annular discs, and a groove is defined inside the hub; and a connecting plate, passing through the circular disc and the plurality of annular discs to connect the plurality of annular discs to the circular disc; wherein a motor is provided in the groove, and the motor directly drives the circular disc to rotate, and then the circular disc drives the plurality of annular discs to rotate, so as to form laminar wind by utilizing the viscous effect; a plurality of centrifugal blades perpendicular to the annular discs are provided on the outer side of the peripheral wall of the hub, and are configured to accelerate the air flow to between the plurality of annular discs during rotation.

[0007] Optionally, when rotating, the plurality of centrifugal blades guide the air in the groove to between the plurality of annular discs through a plurality of outlets on the peripheral wall of the hub, wherein the plurality of outlets are formed by gaps between the plurality of centrifugal blades.

[0008] Optionally, an air inlet channel is formed in the centers of the plurality of annular discs to allow air outside the laminar flow fan to enter.

[0009] Optionally, a plurality of inlets are provided at the bottom of the hub to allow the air in the air inlet channel to enter the groove, and the centrifugal blades guide the air in the groove between the plurality of annular discs to dissipate the heat generated by the operation of the generator.

[0010] Optionally, a plurality of centrifugal blades are evenly spaced apart and arranged on the outer side of the peripheral wall of the hub.

[0011] Optionally, the inner diameters of the plurality of annular discs gradually decrease from one side away from the circular disc to the other side.

[0012] Optionally, the chord length of the connecting piece gradually increases from one side away from the circular disc to the other side.

[0013] Optionally, a plurality of connecting plates are provided and are evenly spaced throughout the circular disc and the plurality of annular discs.

[0014] Optionally, a plurality of air outlets are formed in the gaps between the plurality of annular discs to allow the laminar air to be blown out.

[0015] Optionally, the plurality of annular discs are all planar discs, and the radius of the circular disc is the same as the outer diameter of the plurality of annular discs.

[0016] The laminar flow fan of the present invention comprises: a plurality of annular discs arranged parallel to each other and having the same central axis; circular discs arranged parallel to each other at intervals on one side of the plurality of annular discs, with a hub formed at the center of the circular discs facing the plurality of annular discs, and a groove defined inside the hub; and a connecting piece extending through the circular discs and the plurality of annular discs to connect the plurality of annular discs to the circular discs; wherein a motor is provided in the groove to directly drive the circular discs to rotate, which in turn drives the plurality of annular discs to rotate, thereby generating laminar wind by utilizing the viscous effect; a plurality of centrifugal blades perpendicular to the annular discs are provided on the outer side of the peripheral wall of the hub, configured to accelerate air flow between the plurality of annular discs during rotation. The laminar flow fan achieves laminar air supply through the viscous effect, with low noise and high air volume during the air supply process, effectively improving the user experience; the provision of the centrifugal blades effectively accelerates air flow, increases the air volume entering the laminar flow fan, thereby improving the working efficiency of the laminar flow fan, and at the same time, the outer annular discs can effectively block the noise generated by the centrifugal blades in the middle.

[0017] Furthermore, in the laminar flow fan of the present invention, the multiple centrifugal blades guide the air in the groove to between the multiple annular discs through the multiple outlets on the peripheral wall of the hub when rotating, wherein the multiple outlets are formed by the gaps between the multiple centrifugal blades. An air inlet channel is formed in the centers of the multiple annular discs to allow air from outside the laminar flow fan to enter. Multiple inlets are provided at the bottom of the hub to allow the air in the air inlet channel to enter the groove, and the centrifugal blades guide the air in the groove to between the multiple annular discs to dissipate the heat generated by the generator, dissipating the heat of the heat motor in time, which can further improve the working efficiency of the laminar flow fan. The inner diameter of the multiple annular discs of the laminar flow fan can gradually decrease from one side away from the circular disc to the other side, which can effectively increase the air volume of the laminar flow fan so that the air outlet of the laminar flow fan meets the user's usage requirements.

[0018] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of air supply of a centrifugal fan in the prior art;

[0021] Figure 2 is a schematic diagram of the overall structure of a laminar flow fan according to an embodiment of the present invention;

[0022] Figure 3 yes Figure 2 Schematic diagram of the overall structure of the meso-laminar flow fan from another perspective;

[0023] Figure 4 yes Figure 2 Schematic diagram of the overall structure of the mid-level flow fan from another perspective;

[0024] Figure 5 yes Figure 2 Schematic diagram of air circulation of a mid-level laminar flow fan;

[0025] Figure 6 1 is a schematic diagram of the air supply principle of a laminar flow fan according to an embodiment of the present invention;

[0026] Figure 7 is a velocity distribution and force distribution diagram of a laminar flow fan according to one embodiment of the present invention;

[0027] Figure 8is a schematic diagram of the overall structure of a laminar flow fan according to another embodiment of the present invention;

[0028] Figure 9 yes Figure 8 Schematic diagram of the overall structure of the meso-laminar flow fan from another perspective;

[0029] Figure 10 yes Figure 8 Schematic diagram of the overall structure of the mid-level flow fan from another perspective;

[0030] Figure 11 yes Figure 8 Schematic diagram of air circulation of a mid-level laminar flow fan;

[0031] Figure 12 is a partial cross-sectional view of a laminar flow fan having multiple annular disks with gradually varying inner diameters; and

[0032] Figure 13 yes Figure 12 Schematic diagram of the relationship between the gradual change in the inner diameter of multiple annular disks of a meso-laminar flow fan and the air volume and pressure. DETAILED DESCRIPTION

[0033] Figure 1 It is a schematic diagram of air supply of a centrifugal fan 200 in the prior art. Figure 1 The two arrows in the figure show the direction of air flow during the air supply process of the centrifugal fan 200 when applied to a vertical air conditioner. The centrifugal fan 200 in the prior art needs to make two 90° turns in the entire process from air intake to air discharge when applied to a vertical air conditioner, and each turn is accompanied by a large amount of air volume loss. In addition, the centrifugal fan 200 generally requires dozens of large-volume blades to increase the wind pressure and air volume. When the centrifugal fan 200 is working, the rotation of the blades generates friction or impact with the air. The blades of the centrifugal fan 200 are relatively wide and thick, so when the motor of the centrifugal fan 200 runs at high speed, it will generate very loud noise. In addition, cross-flow fans are also commonly used in the prior art. However, although cross-flow fans have lower noise, the wind pressure is too low and the air supply distance is short. In addition, the overall volume of the cross-flow fan is large, while the actual effective volume is small, resulting in space waste.

[0034] This embodiment provides a laminar flow fan that uses the viscous effect to achieve laminar air supply. The air supply process has low noise and high air volume, effectively improving the user experience; the set centrifugal blades effectively increase the air volume entering the laminar flow fan, thereby improving the working efficiency of the laminar flow fan. At the same time, the external annular disc can effectively block the noise generated by the middle centrifugal blades. Figure 2 1 is a schematic diagram of the overall structure of a laminar flow fan 100 according to an embodiment of the present invention. Figure 3 yes Figure 2 A schematic diagram of the overall structure of the mid-level flow fan 100 from another perspective. Figure 4 yes Figure 2 The overall structural diagram of the mid-level flow fan 100 from another perspective is as follows: Figure 5 yes Figure 2 Schematic diagram of air circulation of laminar flow fan 100. Figures 2 to 5 As shown, the laminar flow fan 100 of this embodiment may generally include: a plurality of annular discs 10 , circular discs 30 and connecting plates 40 .

[0035] The plurality of annular discs 10 may be arranged parallel to each other at intervals and have the same central axis. The circular disc 30 may be arranged parallel to each other at intervals on one side of the plurality of annular discs 10. A hub 301 may be formed at the center of the circular disc 30, facing the plurality of annular discs 10. The hub 301 may have a groove 305 defined therein. The circular disc 30 and the plurality of annular discs 10 may have the same central axis. A connecting piece 40 may pass through the circular disc 30 and the plurality of annular discs 10 to connect the plurality of annular discs 10 to the circular disc 30.

[0036] A motor (not shown in the figure) can be provided in the groove 305, and the motor directly drives the circular disc 30 to rotate, and then the circular disc 30 drives the multiple annular discs 10 to rotate, so as to form laminar wind by utilizing the viscous effect. The laminar flow fan 100 realizes laminar air supply through the viscous effect, and the air supply process has low noise and high air volume, which effectively improves the user experience. A plurality of centrifugal blades 302 perpendicular to the annular discs 10 are provided on the outer side of the peripheral wall of the hub 301, and are configured to accelerate the air flow to between the multiple annular discs 10 during rotation. It should be noted that the multiple centrifugal blades 302 can be evenly spaced and arranged on the outer side of the peripheral wall of the hub 301. The specific number of centrifugal blades 302 can be set according to the actual situation of the hub 301. The outer annular disc 10 can effectively block the noise generated by the centrifugal blades 302 in the middle.

[0037] Figure 6 FIG. 1 is a schematic diagram of the air supply principle of a laminar flow fan 100 according to an embodiment of the present invention. Figure 7 This is a diagram of the velocity distribution and force distribution of a laminar flow fan 100 according to an embodiment of the present invention. The air supply principle of the laminar flow fan 100 is mainly derived from the "Tesla turbine" discovered by Nikola Tesla. The Tesla turbine mainly uses the "laminar boundary layer effect" or "viscous effect" of the fluid to achieve the purpose of doing work on the "turbine disc". The laminar flow fan 100 of this embodiment drives the circular disc 30 through a motor, and the circular disc 30 drives multiple annular discs 10 to rotate at high speed. The air in the gaps between each disc contacts and moves with each other, and the air boundary layer 13 near the surface of each disc is driven by the rotating disc to rotate from the inside to the outside to form laminar wind due to the viscous shear force τ. The air boundary layer 13 refers to a very thin air layer near the surface of each disc.

[0038] Figure 7 The diagram shows the viscous shear force distribution τ(y) and velocity distribution u(y) on the air boundary layer 13. The viscous shear force on the air boundary layer 13 is actually the resistance generated by each disk on the air boundary layer 13. Figure 6 The horizontal axis in refers to the distance in the direction of movement of the air boundary layer 13, and the vertical axis refers to the height of the air boundary layer 13 in a direction perpendicular to the direction of movement. ve is the airflow velocity at each point in the air boundary layer 13, δ is the thickness of the air boundary layer 13, and τw is the viscous shear force at the surface of the annular disk 10. The variable y in τ(y) and u(y) refers to the height of the cross section of the air boundary layer 13 in a 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. Then, τ(y) is the viscous shear force distribution of the cross section of the air boundary layer 13 at this distance L when the height is y; u(y) is the velocity distribution when the height of the cross section of the air boundary layer 13 at this distance L is y.

[0039] like Figures 2 to 5 As shown, the centers of the multiple annular discs 10 collectively form an air inlet channel 11 to allow air from outside the laminar flow fan 100 to enter. The gaps between the multiple annular discs 10 form multiple air outlets 12 for the laminar air to be blown out. It should be noted that the process of the air boundary layer 13 rotating from the inside to the outside to form the laminar air flow is centrifugal motion, and therefore the speed when leaving the air outlet 12 is greater than the speed when entering the air inlet channel 11. The pressure difference between the air outlet 12 of the laminar flow fan 100 and the entrance of the air inlet channel 11 is the wind pressure.

[0040] Figure 5 The arrows in the figure specifically illustrate the process by which air outside the laminar flow fan 100 of this embodiment enters the laminar flow fan 100. The air outside the laminar flow fan 100 first enters the air inlet duct 11. A portion of the air then flows directly between the multiple annular discs 10, forming a laminar flow and being blown out through the multiple air outlets 12. Another portion of the air is directed between the multiple annular discs 10 by the centrifugal blades 302, also forming a laminar flow and being blown out through the multiple air outlets 12. The centrifugal blades 302 can guide the air within the grooves 305 between the multiple annular discs 10, acting as a guide, increasing the air intake between the multiple annular discs 10, and thereby improving the operating efficiency of the laminar flow fan 100.

[0041] Figure 8 1 is a schematic diagram of the overall structure of a laminar flow fan 100 according to another embodiment of the present invention. Figure 9 yes Figure 8 A schematic diagram of the overall structure of the mid-level flow fan 100 from another perspective. Figure 10 yes Figure 8 The overall structural diagram of the mid-level flow fan 100 from another perspective is as follows: Figure 11is based on Figure 8 Schematic diagram of air circulation of laminar flow fan 100. Figure 8 and Figure 9 As shown, compared to the previous embodiment, the hub 301 in this embodiment has multiple inlets on its bottom wall, and multiple outlets on its peripheral wall. During rotation, the multiple centrifugal blades 302 in this embodiment direct air within the grooves 305 toward the spaces between the multiple annular discs 10 through the multiple outlets 304 on the peripheral wall of the hub 301. The multiple outlets 304 are formed by the gaps between the multiple centrifugal blades 302 in each group.

[0042] The hub 301 has multiple inlets 303 at its bottom to allow air from the air inlet channel 11 to enter the groove 305. The centrifugal blades 302 direct the air from the groove 305 between the multiple annular discs 10, thereby dissipating heat generated by the generator. The multiple inlets 303 can be evenly spaced along the bottom edge of the hub 301. The specific number and size of the inlets 303 can be determined based on actual needs and the area of ​​the bottom wall of the hub 301. The multiple inlets 303 at the bottom of the hub 301 not only allow air to enter the groove 305 but also reduce the weight of the laminar flow fan 100, effectively lowering its cost.

[0043] Figure 11 The arrows in the figure specifically illustrate the process of air outside the laminar flow fan 100 of this embodiment entering the laminar flow fan 100. The air outside the laminar flow fan 100 first enters the air inlet channel 11, and then a portion of the air directly enters between the multiple annular discs 10, forming laminar wind and blowing out through the multiple air outlets 12; another portion enters the groove 305 through the inlet 303 at the bottom of the hub 301, and the centrifugal blades 302 guide the air in this portion of the groove 305 between the multiple annular discs 10, also forming laminar wind and blowing out through the multiple air outlets 12. The centrifugal blades 302 can not only guide the air in the groove 305 between the multiple annular discs 10, playing a guiding role, increasing the air intake between the multiple annular discs 10, and thus improving the working efficiency of the laminar flow fan 100; it can also promptly release the heat generated when the motor is working, further improving the working efficiency of the laminar flow fan 100.

[0044] Figure 12 This is a partial cross-sectional view of a laminar flow fan 100 with multiple annular disks 10 having gradually varying inner diameters. Figure 13 yes Figure 12Schematic diagram of the relationship between the gradual change in the inner diameter of the multiple annular disks 10 of the laminar flow fan 100 and the air volume and air pressure. The inner diameters of the multiple annular disks 10 in the above two embodiments gradually decrease from one side away from the circular disk 30 to the other side. As the inner diameters of the multiple annular disks 10 gradually decrease from one side away from the circular disk 30 to the other side, the air volume of the laminar flow fan 100 will be effectively increased, so that the air output of the laminar flow fan 100 meets the user's usage needs. In a preferred embodiment, the inner diameter change of two adjacent annular disks 10 is the same, that is, the inner diameters of the multiple annular disks 10 decrease by the same amount from one side away from the circular disk 30 to the other side.

[0045] Figure 13 The middle horizontal axis "shrinking uniform expanding inner radius increase" refers to the change in the inner diameter of each annular disc 10 and the inner diameter of the adjacent annular disc 10 below. The left vertical axis "Massflow rate" refers to the air volume, and the right vertical axis "Pressure rise" refers to the air pressure. Specifically, Figure 13 The figure shows the relationship between the gradual change of the inner diameter of the multiple annular discs 10 and the air volume and pressure when the outer diameter, spacing, number, thickness and motor speed of the annular discs 10 of the laminar fan 100 remain unchanged. Figure 13 As shown, when all the aforementioned parameters remain constant, the gradual change in the inner diameter of the multiple annular disks 10 from the side away from the circular disk 30 to the other side has a greater impact on the air volume, but a smaller impact on the air pressure. When the change in the inner diameter of each annular disk 10 and the inner diameter of the adjacent annular disk 10 on the side away from the circular disk 30, as represented by the abscissa axis, is a positive number, it indicates that the inner diameters of the multiple annular disks 10 gradually increase from the side away from the circular disk 30 to the other side. When the change in the inner diameter of each annular disk 10 and the inner diameter of the adjacent annular disk 10 on the side away from the circular disk 30, as represented by the abscissa axis, is a negative number, it indicates that the inner diameters of the multiple annular disks 10 gradually decrease from the side away from the circular disk 30 to the other side.

[0046] Depend on Figure 13 It can be seen that when the inner diameters of the multiple annular disks 10 gradually decrease from the side away from the circular disk 30 to the other side, the air volume of the laminar flow fan 100 increases slightly and the air pressure decreases slightly. When the inner diameters of the multiple annular disks 10 gradually increase from the side away from the circular disk 30 to the other side, the air pressure of the laminar flow fan 100 increases slightly and the air volume decreases significantly. Therefore, considering the air volume and air pressure of the laminar flow fan 100, the inner diameters of the multiple annular disks 10 are set to gradually decrease from the side away from the circular disk 30 to the other side.

[0047] In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the spacing between the annular disks 10 is 13.75 mm, the number of annular disks 10 is 8, the thickness of the annular disk 10 is 2 mm, and the motor speed is 1000 rpm (revolutions per minute). In this case, taking into account the air volume and air pressure of the laminar flow fan 100, the inner diameter of each annular disk 10 can be set to vary by -5 mm from the inner diameter of the adjacent annular disk 10 below. That is, the inner diameters of the eight annular disks 10 can be set to, from one side away from the circular disk 30 to the other side, 115 mm, 110 mm, 105 mm, 100 mm, 95 mm, 90 mm, 85 mm, and 80 mm, respectively. The inner diameter of each annular disk 10 is 5 mm smaller than the inner diameter of the adjacent annular disk 10 below. It should be noted that the spacing between the annular disks 10 mentioned above specifically refers to the spacing between two adjacent annular disks 10. Furthermore, it should be emphasized that the inner diameters of the multiple annular disks 10 gradually decrease from one side away from the circular disk 30 to the other side, which actually means that the inner diameters of the multiple annular disks 10 gradually decrease along the direction of airflow in the air inlet channel 11.

[0048] The inner diameters of the multiple annular discs 10 gradually decrease from one side away from the circular disc 30 to the other side, while the chord length of the connecting piece 40 gradually increases from one side away from the circular disc 30 to the other side. The cross-section of the connecting piece 40 comprises two curved sections arranged sequentially along the direction of rotation of the annular disc 10, and the chord length of the two curved sections is the chord length. Multiple connecting pieces 40 can be provided, evenly spaced throughout the circular disc 30 and the multiple annular discs 10. This ensures a stable connection between the circular disc 30 and the multiple annular discs 10, thereby ensuring that when the motor drives the circular disc 30 to rotate, the circular disc 30 can stably drive the multiple annular discs 10 to rotate, thereby improving the operational reliability of the laminar flow fan 100.

[0049] In a specific embodiment, the multiple annular discs 10 can all be flat discs, and the radius of the circular disc 30 is the same as the outer diameter of the multiple annular discs 10. It should be noted that the inner diameter of the annular disc 10 refers to the radius of its inner circumference; the outer diameter refers to the radius of its outer circumference. The laminar flow fan 100 of this embodiment can not only be used alone to supply air, but more importantly, the laminar flow fan 100 can also be applied to various types of air conditioner indoor units, such as vertical air conditioners and wall-mounted air conditioners. Considering the limited internal space of the air conditioner indoor unit, the overall volume of the laminar flow fan 100 needs to be subject to certain constraints. In the horizontal direction, the radius of the circular disc 30 and the outer diameter of the annular disc 10 can be constrained; in the vertical direction, the spacing between the multiple annular discs 10 and the thickness and number of the annular discs 10 can be constrained.

[0050] In this embodiment, the spacing between adjacent annular discs 10 can be uniform, meaning that the annular discs 10 are arranged parallel to each other at the same spacing. The multiple air outlets 12 formed by the gaps between the annular discs 10 enable the laminar flow fan 100 to achieve 360-degree uniform air delivery, preventing user discomfort caused by direct airflow from the air conditioner and further enhancing the user experience.

[0051] The laminar flow fan 100 of this embodiment includes: a plurality of annular discs 10, which are arranged in parallel with each other at intervals and have the same central axis; circular discs 30, which are arranged in parallel with each other at intervals on one side of the plurality of annular discs 10, and a hub 301 is formed at the center of the circular disc 30 facing the plurality of annular discs 10, and a groove 305 is defined inside the hub 301; and a connecting piece 40, which passes through the circular disc 30 and the plurality of annular discs 10 to connect the plurality of annular discs 10 to the circular disc 30; wherein a motor is provided in the groove 305, and the motor directly drives the circular disc 30 to rotate, and then the circular disc 30 drives the plurality of annular discs 10 to rotate, so as to form laminar wind by utilizing the viscous effect; a plurality of centrifugal blades 302 perpendicular to the annular discs 10 are provided on the outer side of the peripheral wall of the hub 301, which are configured to accelerate the air flow to between the plurality of annular discs 10 during rotation. The laminar flow fan 100 achieves laminar air supply through the viscous effect, with low noise and high air volume during the air supply process, effectively improving the user experience; the setting of the centrifugal blades 302 effectively increases the air volume entering the laminar flow fan 100, thereby improving the working efficiency of the laminar flow fan 100. At the same time, the external annular disc 10 can effectively block the noise generated by the middle centrifugal blades 302.

[0052] Furthermore, in the laminar flow fan 100 of this embodiment, the multiple centrifugal blades 302, during rotation, direct air within the groove 305 between the multiple annular discs 10 through multiple outlets 304 on the peripheral wall of the hub 301. The multiple outlets 304 are formed by the gaps between the multiple centrifugal blades 302. An air inlet duct 11 is formed at the center of the multiple annular discs 10, allowing air from outside the laminar flow fan 100 to enter. Multiple inlets 303 are provided at the bottom of the hub 301, allowing air within the air inlet duct 11 to enter the groove 305. The centrifugal blades 302 direct air within the groove 305 between the multiple annular discs 10, dissipating heat generated by the generator and the motor, further improving the operating efficiency of the laminar flow fan 100. The inner diameters of the multiple annular discs 10 of the laminar flow fan 100 gradually decrease from one side away from the circular disc 30 to the other, effectively increasing the air volume of the laminar flow fan 100 and ensuring that the air output of the laminar flow fan 100 meets user requirements.

[0053] Those skilled in the art should understand that, unless otherwise specified, the terms "up", "down", "left", "right", "front", "back", etc. used in the embodiments of the present invention to indicate orientation or positional relationships are based on the actual usage status of the laminar flow fan 100. These terms are only used to facilitate the 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. Therefore, they cannot be understood as limiting the present invention.

[0054] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A laminar flow fan, comprising: A plurality of annular discs are arranged in parallel and spaced apart from each other and have the same central axis; circular discs, spaced and arranged in parallel on one side of the plurality of annular discs, with a hub formed in the center of the circular disc facing the plurality of annular discs, and a groove defined inside the hub; and a connecting piece passing through the circular disc and the plurality of annular discs to connect the plurality of annular discs to the circular disc; A motor is provided in the groove, and the motor directly drives the circular disc to rotate, and the circular disc then drives the multiple annular discs to rotate, so as to form laminar wind by utilizing the viscosity effect; The outer side of the peripheral wall of the hub is provided with a plurality of centrifugal blades perpendicular to the annular discs, which are configured to accelerate the air flow between the plurality of annular discs during rotation. The inner diameters of the plurality of annular discs gradually decrease from one side away from the circular disc to the other side. The chord length of the connecting plate gradually increases from one side away from the circular disc to the other side, wherein the cross section of the connecting plate has two curved lines arranged in sequence along the direction of rotation of the annular disc, and the chord length of the two curved lines is the chord length.

2. The laminar flow fan according to claim 1, wherein When rotating, the plurality of centrifugal blades guide the air in the groove to between the plurality of annular discs through the plurality of outlets on the peripheral wall of the hub, wherein the plurality of outlets are formed by the gaps between the plurality of centrifugal blades.

3. The laminar flow fan according to claim 1, wherein An air inlet channel is formed in the centers of the plurality of annular discs to allow air outside the laminar flow fan to enter.

4. The laminar flow fan according to claim 3, wherein The bottom of the hub is provided with a plurality of inlets so that the air in the air inlet channel can enter the groove, and The centrifugal blades guide the air in the groove to between the plurality of annular discs to dissipate heat generated by the operation of the motor.

5. The laminar flow fan according to claim 1, wherein The plurality of centrifugal blades are evenly spaced and arranged on the outer side of the peripheral wall of the hub.

6. The laminar flow fan according to claim 1, wherein A plurality of connecting plates are provided and are evenly spaced and pass through the circular disc and the plurality of annular discs.

7. The laminar flow fan according to claim 1, wherein A plurality of air outlets are formed in the gaps between the plurality of annular discs for the laminar air to be blown out.

8. The laminar flow fan according to claim 1, wherein The plurality of annular discs are all planar discs, and The radius of the circular disk is the same as the outer diameter of the plurality of annular disks.

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