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 motor, which is configured to drive the plurality of annular discs to rotate, so that the plurality of annular discs are in contact with the air between each other and move relative to each other, thereby causing the air boundary layer close to the surface of the plurality of annular discs to be driven by the rotating plurality of annular discs to rotate from the inside to the outside due to the viscosity effect to form a laminar wind; blades, which penetrate the plurality of annular discs, wherein the cross section of the blades has two sections of curves arranged in sequence along the direction of rotation of the annular discs, and the chord length of the two sections of curves is linearly related to the air volume of the laminar flow fan. The laminar flow fan of the present invention can increase the air volume and air pressure of the laminar flow fan by increasing the chord length of the blades, thereby promoting laminar air circulation; laminar air supply is achieved through the viscosity effect, and the air supply process has low noise, high air volume and high air pressure.

Description

Technical Field

[0001] The 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] The current air conditioning devices mainly include various types of air conditioners and fans, but most users believe that the hot air or cold air generated by the current air conditioners is unevenly distributed in the room or enclosed space, and has certain distribution limitations. In addition, the fans used in the indoor unit of the air conditioner are mainly centrifugal fans and cross-flow fans. However, centrifugal fans and cross-flow fans have the following problems: Since the centrifugal fan needs dozens of large-volume blades to increase the wind pressure and air volume, the centrifugal fan is very noisy, and when the centrifugal fan is used in a vertical air conditioner, the air needs to make two 90° turns from entering the centrifugal fan to being sent out of the air conditioner, and each direction turn will cause air volume loss; although the cross-flow fan has lower noise, the wind pressure is too small 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. Summary of the invention

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

[0005] A further purpose of the present invention is to enable the laminar flow fan to achieve 360° air supply, avoid the air blowing directly on the user, and improve the user experience.

[0006] In particular, the present invention provides a laminar flow fan, comprising: a plurality of annular disks, which are arranged in parallel with an interval between each other and have the same central axis; a motor, configured to drive the plurality of annular disks to rotate, so that the plurality of annular disks contact the air between each other and move relative to each other, thereby causing the air boundary layer close to the surfaces of the plurality of annular disks to be driven by the rotating plurality of annular disks to rotate from the inside to the outside due to the viscosity effect to form laminar wind; and blades, which penetrate the plurality of annular disks, wherein the cross-section of the blades has two curved sections arranged in sequence along the direction of rotation of the annular disks, and the chord lengths of the two curved sections are linearly related to the air volume of the laminar flow fan.

[0007] Optionally, the centers of the multiple annular disks together form an air inlet channel to allow air outside the laminar fan to enter; the gaps between the multiple annular disks form multiple air outlets for laminar wind to blow out; the pressure difference between the air outlet and the inlet of the air inlet channel is the wind pressure, and the chord length is also linearly related to the wind pressure.

[0008] Optionally, the cross section of the blade has two arcs arranged in sequence along the rotation direction of the annular disk: an inner arc and a back arc, and both the inner arc and the back arc protrude toward the rotation direction of the annular disk, have the same center and are arranged in parallel.

[0009] Optionally, the distance between the two end points of the inner arc is the same as the distance between the two end points of the back arc, and the chord length is the distance between the two end points of the inner arc or the back arc, and is set to 40 mm to 42 mm.

[0010] Optionally, the laminar flow fan further comprises: a single circular disc arranged in parallel and at intervals above the plurality of annular discs, and a motor fixedly arranged above the circular disc.

[0011] Optionally, the blades also penetrate the circular disk to connect the plurality of annular disks to the circular disk.

[0012] Optionally, the motor is further configured to: directly drive the circular disc to rotate, and then the circular disc drives the multiple annular discs to rotate.

[0013] Optionally, the plurality of annular disks are all planar disks; and the lower surface of the circular disk has an inverted cone-shaped protrusion to guide the air flow entering the laminar flow fan and assist in forming laminar wind.

[0014] Optionally, the radius of the circular disk is the same as the outer diameter of the plurality of annular disks.

[0015] Optionally, there are multiple blades that are evenly spaced throughout the circular disk and the multiple annular disks.

[0016] The laminar fan of the present invention comprises: a plurality of annular discs, which are arranged in parallel with each other and have the same central axis; a motor, which is configured to drive the plurality of annular discs to rotate, so that the plurality of annular discs are in contact with the air between each other and move relative to each other, thereby causing the air boundary layer near the surface of the plurality of annular discs to be driven by the rotating plurality of annular discs to rotate from the inside to the outside due to the viscosity effect to form a laminar wind; and a blade, which penetrates the plurality of annular discs, wherein the cross section of the blade has two sections of curves arranged in sequence along the direction of rotation of the annular discs, and the chord length of the two sections of curves is linearly related to the air volume of the laminar fan. By increasing the chord length of the blade, the air volume of the laminar fan can be greatly increased, thereby promoting laminar air circulation. In addition, the laminar fan realizes laminar air supply through the viscosity effect, and the air supply process has low noise, high air volume, and high wind pressure, which effectively improves the user experience.

[0017] Furthermore, in the laminar fan of the present invention, the centers of the multiple annular discs jointly form an air inlet channel to allow air outside the laminar fan to enter; the gaps between the multiple annular discs form multiple air outlets for laminar wind to blow out; the pressure difference between the air outlet and the entrance of the air inlet channel is the wind pressure, and the chord length is also linearly related to the wind pressure. By increasing the chord length of the blade, the wind pressure of the laminar fan can also be greatly improved, effectively ensuring the comprehensive performance of the laminar fan. When the blade is a double arc blade, that is, the cross-section of the blade has double arcs arranged in sequence along the direction of rotation of the annular disc: an inner arc and a back arc, and the inner arc and the back arc both protrude in the direction of rotation of the annular disc, have the same center of circle and are arranged in parallel. The distance between the two end points of the inner arc is the same as the distance between the two end points of the back arc, and the chord length is the distance between the two end points of the inner arc or the back arc, and is set to 40㎜ to 42㎜. Taking into account the overall occupied volume, air volume and air pressure of the laminar flow fan, the chord length is set to the maximum achievable range when the outer diameter and inner diameter of the annular disk are constant, so that the air volume and air pressure of the laminar flow fan can meet the user's usage requirements, further improving the user experience.

[0018] Furthermore, in the laminar flow fan of the present invention, after the laminar air is blown out through the multiple air outlets, due to the pressure difference, the air outside the laminar flow fan is pressed into the annular disc through the air inlet, and this cycle is repeated, thereby forming a laminar air circulation. The multiple air outlets formed by the gaps between the multiple annular discs can enable the laminar flow fan to achieve 360° air supply, avoiding various discomfort symptoms caused by the direct air supply of the air conditioner, and further improving the user experience.

[0019] 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

[0020] 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:

[0021] Figure 1 It is a schematic diagram of air supply of a centrifugal fan in the prior art;

[0022] Figure 2 is a schematic diagram of the overall structure of a laminar flow fan according to an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 Schematic diagram of the overall structure of the meso-flow fan from another perspective;

[0024] Figure 4 yes Figure 2 The overall structural diagram of the meso-flow fan from another perspective;

[0025] Figure 5 is a schematic diagram of air circulation of a laminar flow fan according to an embodiment of the present invention;

[0026] Figure 6 is a cross-sectional schematic diagram of a laminar flow fan according to an embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of the relationship between the chord length of the blades of a laminar flow fan and the air volume and air pressure according to an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of the air supply principle of a laminar flow fan according to an embodiment of the present invention; and

[0029] Fig. 9 1 is a diagram showing the velocity distribution and force distribution of a laminar flow fan according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] 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 from air intake to air outlet 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 needs dozens of large-volume blades to increase the wind pressure and air volume. When the centrifugal fan 200 is working, the blades rotate and produce friction or impact with the air. The blades of the centrifugal fan 200 are 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, but although the cross-flow fan has low noise, the wind pressure is too small and the air supply distance is short; and the overall volume of the cross-flow fan is large, while the actual effective volume is small, resulting in space waste. This embodiment provides a laminar flow fan 100, which realizes laminar air supply through the viscosity effect, has low noise, high air volume and high wind pressure during the air supply process, and effectively improves the user experience. Figure 2 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 The overall structural diagram of the middle laminar flow fan 100 from another perspective, Figure 4 yes Figure 2 The overall structural diagram of the middle laminar flow fan 100 from another perspective, Figure 5 is a schematic diagram of air circulation of a laminar flow fan 100 according to an embodiment of the present invention, Figure 6FIG. 1 is a cross-sectional schematic diagram of a laminar flow fan 100 according to an embodiment of the present invention. Figures 2 to 6 As shown, the laminar flow fan 100 of this embodiment may generally include: a plurality of annular disks 10 , a motor 20 and blades 40 .

[0031] The plurality of annular discs 10 may be arranged in parallel and spaced apart from each other, and have the same central axis. The motor 20 may be configured to drive the plurality of annular discs 10 to rotate, so that the plurality of annular discs 10 contact the air between each other and move relative to each other, thereby causing the air boundary layer 13 near the surface of the plurality of annular discs 10 to rotate from inside to outside due to the viscosity effect driven by the rotating plurality of annular discs 10 to form a laminar wind. The air boundary layer 13 is a very thin air layer near the surface of each disc.

[0032] like Figures 2 to 6 As shown, the blade 40 can penetrate multiple annular discs 10, wherein the cross section of the blade 40 has two curves 41 and 42 arranged in sequence along the direction of rotation of the annular disc 10, and the length of the chord 51 of the two curves 41 and 42 is linearly related to the air volume of the laminar flow fan 100. It should be noted that the two curves 41 and 42 can be arcs, non-arc arcs, straight lines, etc., and the straight line can be used as a special curve. When the distance between the two end points of the curve 41 is the same as the distance between the two end points of the curve 42, the length of the chord 51 can be the distance between the two end points of the curve 41 or the curve 42. When the distance between the two end points of the curve 41 is different from the distance between the two end points of the curve 42, if the curve 41 and the curve 42 do not intersect at both ends, the length of the chord 51 can be the length of the line connecting the midpoints of the cross section of the blade 40 excluding the curves 41 and 42; if the curve 41 and the curve 42 intersect at only one end, the length of the chord 51 can be the length of the line connecting the midpoint of the cross section of the blade 40 excluding the curves 41 and 42 and the intersecting end points.

[0033] In the laminar flow fan 100 of this embodiment, since the length of the chord 51 of the two curves 41 and 42 is linearly related to the air volume of the laminar flow fan 100, the air volume of the laminar flow fan 100 can be greatly increased by increasing the length of the chord 51, thereby promoting laminar air circulation. In addition, the laminar flow fan 100 realizes laminar air supply through the viscosity effect, and the air supply process has low noise, high air volume, and high air pressure, which greatly improves the user experience.

[0034] like Figures 2 to 6As shown, the centers of the multiple annular discs 10 are jointly formed with an air inlet channel 11 to allow air outside the laminar fan 100 to enter. The gaps between the multiple annular discs 10 form multiple air outlets 12 for the laminar wind to blow out. The process of the air boundary layer 13 rotating from the inside to the outside to form the laminar wind is a centrifugal motion, so the speed when leaving the air outlet 12 is greater than the speed when entering the air inlet channel 11. The spacing between every two adjacent annular discs 10 in the multiple annular discs 10 of this embodiment can be the same, that is, the multiple annular discs 10 are arranged in parallel with each other at the same spacing. The multiple air outlets 12 formed by the gaps between the multiple annular discs 10 can enable the laminar fan 100 to achieve 360° uniform air supply, avoid various discomfort symptoms caused by the direct blowing of the air conditioner to the user, and further enhance the user experience.

[0035] The pressure difference between the air outlet 12 and the inlet of the air inlet channel 11 is the wind pressure, and the length of the chord 51 is also linearly related to the wind pressure. By increasing the length of the chord 51, the wind pressure of the laminar flow fan 100 can also be greatly improved, and the comprehensive performance of the laminar flow fan 100 can be effectively guaranteed. The laminar flow fan 100 of this embodiment can not only be used alone for air supply, 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 that the internal space of the air conditioner indoor unit is limited, the overall occupied volume of the laminar flow fan 100 needs to be subject to certain constraints.

[0036] The laminar fan 100 of this embodiment takes into account that the thickness should not be too large, and can impose corresponding constraints on the number of annular disks 10, the spacing between two adjacent annular disks 10, and the thickness of the annular disk 10. In addition, the laminar fan 100 takes into account that the lateral occupied volume should not be too large, and can impose corresponding constraints on the outer diameter of the annular disk 10. For example, the outer diameter of each annular disk can be set to 170㎜ to 180㎜, and the inner diameter of each annular disk can be set to 110㎜ to 120㎜, which can effectively increase the air volume and ensure that the air output of the laminar fan meets the user's usage requirements. It should be noted that the outer diameter of the annular disk 10 refers to the radius of the outer circumference of the annular disk 10, and the inner diameter of the annular disk 10 refers to the radius of the inner circumference of the annular disk 10. When the outer diameter and inner diameter of the annular disk 10 are constant, although the longer the chord 51 is, the greater the air volume and air pressure of the laminar flow fan 100 are, the length of the chord 51 must be constrained to a certain extent to prevent the blades 10 from excessively penetrating the annular disk 10, resulting in a decrease in the stability of the laminar flow fan 100. In short, the length of the chord 51 can be set to the maximum achievable range, so that the air volume and air pressure of the laminar flow fan 100 can meet the user's usage requirements.

[0037] like Figure 6As shown, the blade 40 can be a double arc blade, and its cross section has two arcs arranged in sequence along the rotation direction of the annular disk 10: an inner arc 41 and a back arc 42, and the inner arc 41 and the back arc 42 are both protruding in the rotation direction of the annular disk 10, have the same center and are arranged in parallel. Figure 6 In fact, what is shown is a cross-sectional schematic diagram when looking down at the laminar flow fan 100. The motor 20 drives the annular disk 10 to rotate clockwise, and the direction in which the back arc 42 and the inner arc 41 protrude is consistent with the direction in which the annular disk 10 rotates. In some other embodiments, the motor 20 can also drive the annular disk 10 to rotate counterclockwise, and the direction in which the back arc 42 and the inner arc 41 protrude can be consistent with the direction in which the annular disk 10 rotates. Figure 6 The opposite of what is shown in .

[0038] In a preferred embodiment, the outer diameter of each annular disk 10 is 170 mm to 180 mm, and the inner diameter of each annular disk 10 is 110 mm to 120 mm, which can effectively increase the air volume. At this time, the difference between the outer diameter and the inner diameter of the annular disk 10 is about 60 mm, the blade 40 is a double arc blade, the distance between the two end points of the inner arc 41 is the same as the distance between the two end points of the back arc 42, and the length of the chord 51 can be the distance between the two end points of the inner arc 41 or the back arc 42, and is set to 40 mm to 42 mm. The two ends of the inner arc 41 and the back arc 42 are respectively about 10 mm away from the inner circumference and the outer circumference of the annular disk 10. Under the premise of ensuring the stability of the laminar flow fan 100, the length of the chord 51 is set to the maximum achievable range, so that the air volume and air pressure of the laminar flow fan 100 can meet the user's usage requirements.

[0039] Figure 7 1 is a schematic diagram showing the relationship between the length of the chord line 51 of the blade 40 of the laminar flow fan 100 according to an embodiment of the present invention and the air volume and air pressure. The blade 40 of this embodiment may be a double arc blade, the distance between the two end points of the inner arc 41 is the same as the distance between the two end points of the back arc 42, and the length of the chord line 51 may be the distance between the two end points of the inner arc 41 or the back arc 42. Figure 7 The middle horizontal axis Blade chord refers to the length of the chord line 51 of the blade 40 of the laminar flow fan 100, the left vertical axis Mass flowrate refers to the air volume, and the right vertical axis Pressure rise refers to the wind pressure, which 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, Figure 7The diagram shows the relationship between the length of the chord 51 and the air volume and air pressure when the outer diameter, inner diameter, number of layers, spacing, thickness, installation angle of the blades 40, and the speed of the motor 20 of the laminar fan 100 remain unchanged. The installation angle of the blades 40 of this embodiment can be: on the same cross section of the blades 40 and the annular disk 10, the angle formed by the chord 51 between the two end points of the inner arc 41 and the outer diameter 52 of the annular disk 10 passing through the midpoint of the chord 51.

[0040] When all the above-mentioned parameters remain unchanged, for example, in a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175㎜, the inner diameter of the annular disk 10 is 115㎜, the number of layers of the annular disk 10 is 8, the spacing between the annular disks 10 is 13.75㎜, the thickness of the annular disk 10 is 2㎜, the installation angle of the blades 40 is 25.5°, and the speed of the motor 20 is 1000rpm (revolutions per minute). It can be found that after increasing the length of the chord 51, the air volume and air pressure are greatly improved, and are basically linear. Under the premise of ensuring the stability of the laminar flow fan 100, the length of the chord 51 is set to the maximum achievable range of: 40㎜ to 42㎜. In addition, when the length of the chord 51 is set to 42㎜, the air volume of the laminar flow fan 100 can reach 1741m 3 / h, the wind pressure can reach 118.9Pa, which can fully meet the user's needs.

[0041] like Figures 2 to 4 As shown, the laminar flow fan 100 may also include: a single circular disc 30. The circular disc 30 may be arranged in parallel above the plurality of annular discs 10 at intervals, and the motor 20 is fixedly arranged above the circular disc 30. The blades 40 may also penetrate the circular disc 30 to connect the plurality of annular discs 10 to the circular disc 30. The motor 20 may also be configured to: directly drive the circular disc 30 to rotate, and then the circular disc 30 drives the plurality of annular discs 10 to rotate. In other words, the configuration of the motor 20 mentioned above to drive the plurality of annular discs 10 to rotate is dependent on the motor 20 first driving the circular disc 30 to rotate, and then the circular disc 30 drives the plurality of annular discs 10 to rotate. 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 can be set to 170 mm to 180 mm, thereby constraining the horizontal occupied volume of the laminar flow fan 100, and limiting the number of annular disks 10 and the spacing between two adjacent annular disks 10 to constrain the longitudinal thickness of the laminar flow fan 100, which can effectively constrain the overall occupied volume of the laminar flow fan 100. It should be noted 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.

[0042] The plurality of annular discs 10 may all be planar discs, and in a preferred embodiment, the lower surface of the circular disc 30 has an inverted cone protrusion 31 to guide the air flow entering the laminar flow fan 100 and assist in forming laminar wind. The upper surface of the circular disc 30 may be a plane, and the main function of the circular disc 30 is to fix the motor 20 and connect with the plurality of annular discs 10 through the blades 40, so as to drive the plurality of annular discs 10 to rotate when the motor 20 drives the circular disc 30 to rotate. The inverted cone protrusion 31 on the lower surface of the circular disc 30 can effectively guide the air entering the laminar flow fan 100 through the air inlet channel 11 into the gap between the discs, thereby improving the efficiency of forming laminar wind.

[0043] In a preferred embodiment, there are multiple blades 40, which are evenly spaced and penetrate the circular disc 30 and the multiple annular discs 10. Multiple blades 40 are evenly spaced and penetrate the circular disc 30 and the multiple annular discs 10, which can ensure that the connection relationship between the circular disc 30 and the multiple annular discs 10 is stable, and further ensure that when the motor 20 drives the circular disc 30 to rotate, the circular disc 30 can stably drive the multiple annular discs 10 to rotate, thereby improving the working reliability of the laminar flow fan 100.

[0044] Figure 8 Schematic diagram of the air supply principle of a laminar flow fan 100 according to an embodiment of the present invention. Fig. 9 It is a velocity distribution and force distribution diagram 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 the motor 20, and the circular disc drives multiple annular discs 10 to rotate at high speed. The air in the intervals between each disc contacts and moves with each other. Then, the air boundary layer 13 close to the surface of each disc is driven by the rotating disc to rotate from the inside to the outside to form a laminar wind due to the viscous shear force τ.

[0045] Fig. 9 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. Fig. 9 The horizontal axis in refers to the distance in the moving direction of the air boundary layer 13, and the vertical axis refers to the height of the air boundary layer 13 in the direction perpendicular to the moving direction. e is the air velocity at each point in the air boundary layer 13, δ is the thickness of the air boundary layer 13, τ wis 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 the direction perpendicular to the moving direction, and L is the distance between a certain point on the inner circumference of the annular disk 10 and a certain point on the surface of the annular disk 10. Then τ(y) is the distribution of the viscous shear force when the height of the cross section of the air boundary layer 13 is y at the distance L; u(y) is the velocity distribution when the height of the cross section of the air boundary layer 13 is y at the distance L.

[0046] The laminar fan 100 of this embodiment includes: a plurality of annular discs 10, which are arranged in parallel and spaced apart from each other and have the same central axis; a motor 20, which is configured to drive the plurality of annular discs 10 to rotate, so that the plurality of annular discs 10 contact the air between each other and move with each other, thereby causing the air boundary layer 13 near the surface of the plurality of annular discs 10 to be driven by the rotating plurality of annular discs 10 to rotate from the inside to the outside due to the viscosity effect to form a laminar wind; and a blade 40, which penetrates the plurality of annular discs 10, wherein the cross section of the blade 40 has two sections of curves 41 and 42 arranged in sequence along the direction of rotation of the annular disc 10, and the length of the chord 51 of the two sections of curves 41 and 42 is linearly related to the air volume of the laminar fan 100. By increasing the length of the chord 51 of the blade 40, the air volume of the laminar fan 100 can be greatly increased, thereby promoting laminar air circulation. In addition, the laminar fan 100 realizes laminar air supply through the viscosity effect, and the air supply process has low noise, high air volume, and high wind pressure, which effectively improves the user experience.

[0047] Furthermore, in the laminar fan 100 of the present embodiment, the centers of the plurality of annular disks 10 jointly form an air inlet channel 11 to allow air outside the laminar fan 100 to enter; the gaps between the plurality of annular disks 10 form a plurality of air outlets 12 to allow the laminar wind to blow out; the pressure difference between the air outlet 12 and the entrance of the air inlet channel 11 is the wind pressure, and the length of the chord 51 is also linearly related to the wind pressure. By increasing the length of the chord 51 of the blade 40, the wind pressure of the laminar fan 100 can also be greatly improved, effectively ensuring the comprehensive performance of the laminar fan 100. When the blade 40 is a double arc blade, that is, the cross section of the blade 40 has double arcs arranged in sequence along the direction of rotation of the annular disk 10: an inner arc 41 and a back arc 42, and the inner arc 41 and the back arc 42 both protrude in the direction of rotation of the annular disk 10, have the same center of the circle and are arranged in parallel. The distance between the two end points of the inner arc 41 is the same as the distance between the two end points of the back arc 42. The length of the chord 51 is the distance between the two end points of the inner arc 41 or the back arc 42, and is set to 40 mm to 42 mm. Taking into account the overall occupied volume, air volume, and air pressure of the laminar flow fan 100, when the outer diameter and inner diameter of the annular disk 10 are constant, the length of the chord 51 is set to the maximum achievable range, so that the air volume and air pressure of the laminar flow fan 100 can meet the user's use requirements, further improving the user's use experience.

[0048] Furthermore, in the laminar flow fan 100 of the present embodiment, after the laminar air is blown out through the multiple air outlets 12, due to the pressure difference, the air outside the laminar flow fan 100 is pressed into the annular disc 10 through the air inlet, and this cycle is repeated, thereby forming a laminar air circulation. The multiple air outlets 12 formed by the gaps between the multiple annular discs 10 can enable the laminar flow fan 100 to achieve 360° air supply, avoiding various discomfort symptoms caused by the direct air supply of the air conditioner, and further improving the user experience.

[0049] Those skilled in the art should understand that, unless otherwise specified, the terms "up", "down", "left", "right", "front", "back", etc. used to indicate orientation or positional relationships in the embodiments of the present invention are based on the actual use status of the laminar 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 limitations on the present invention.

[0050] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in 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 recognized as covering all these other variations or modifications.

Claims

1. A laminar flow fan, comprising: A plurality of annular discs, the plurality of annular discs are arranged in parallel and spaced apart from each other and have the same central axis; The motor is configured to drive the plurality of annular discs to rotate, so that the plurality of annular discs contact the air between each other and move relative to each other, thereby causing the air boundary layer near the surfaces of the plurality of annular discs to rotate from inside to outside due to the viscosity effect and form a laminar wind. as well as A blade runs through the plurality of annular discs, wherein a cross section of the blade has two curves arranged in sequence along the direction of rotation of the annular discs, and the chord lengths of the two curves are linearly related to the air volume of the laminar flow fan, The centers of the plurality of annular discs jointly form an air inlet channel to allow air outside the laminar flow fan to enter; the gaps between the plurality of annular discs form a plurality of air outlets for the laminar flow wind to blow out; the pressure difference between the air outlet and the inlet of the air inlet channel is the wind pressure, and the chord length is also in a linear relationship with the wind pressure. The cross section of the blade has two arcs arranged in sequence along the rotation direction of the annular disk: an inner arc and a back arc, and the inner arc and the back arc are both convex toward the rotation direction of the annular disk, have the same center and are arranged in parallel; The distance between the two end points of the inner arc is the same as the distance between the two end points of the back arc. The chord length is the distance between the two end points of the inner arc or the back arc, and is set to 40 mm to 42 mm.

2. The laminar flow fan according to claim 1, further comprising: A single circular disk is arranged in parallel above the plurality of annular disks at intervals, and The motor is fixedly arranged above the circular disc.

3. The laminar flow fan according to claim 2, wherein: The blades also penetrate the circular disk to connect the plurality of annular disks to the circular disk.

4. The laminar flow fan according to claim 3, wherein the motor is further configured to: The circular disc is directly driven to rotate, and then the circular disc drives the multiple annular discs to rotate.

5. The laminar flow fan according to claim 2, wherein: The plurality of annular discs are all planar discs; The lower surface of the circular disk has an inverted cone-shaped protrusion to guide the air flow entering the laminar flow fan and assist in forming the laminar flow wind.

6. The laminar flow fan according to claim 2, wherein: The radius of the circular disk is the same as the outer diameter of the plurality of annular disks.

7. The laminar flow fan according to claim 3, wherein: The blades are in plurality and are evenly spaced throughout the circular disk and the plurality of annular disks.

Images