CN111441967A - Laminar flow fan - Google Patents
Laminar flow fan Download PDFInfo
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- CN111441967A CN111441967A CN201910045809.9A CN201910045809A CN111441967A CN 111441967 A CN111441967 A CN 111441967A CN 201910045809 A CN201910045809 A CN 201910045809A CN 111441967 A CN111441967 A CN 111441967A
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- laminar flow
- flow fan
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- 230000000694 effects Effects 0.000 claims abstract description 11
- 238000007664 blowing Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 16
- 230000007423 decrease Effects 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 3
- 208000024891 symptom Diseases 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0022—Centrifugal or radial fans
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention 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, and the inner diameters of the annular disks are gradually reduced from bottom to top; 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. According to the laminar flow fan, the air volume of the laminar flow fan can be effectively improved along with the gradual reduction of the inner diameters of the annular disks from bottom to top, laminar flow air supply is realized through the viscous effect, the use of the traditional fan on the blades is reduced, even the requirement of the air volume can be met without increasing the blades, the noise in the air supply process is low, the air volume is high, and the use experience of a user is effectively improved.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular 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.
Disclosure of Invention
An object of the present invention is to provide a laminar flow fan with low noise and high air volume.
The invention further aims to realize 360-degree air supply of the laminar flow fan, avoid air outlet from blowing directly to users and improve the use experience of the users.
In particular, the present invention provides a laminar flow fan comprising: the annular disks are arranged in parallel at intervals and have the same central axis, and the inner diameters of the annular disks are gradually reduced from bottom to top; 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 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 collectively formed with an air intake passage for allowing air outside the laminar flow fan to enter.
Optionally, a plurality of air outlets are formed in gaps among the plurality of annular disks to blow out laminar air.
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 laminar flow fan of the present invention includes: the annular disks are arranged in parallel at intervals and have the same central axis, and the inner diameters of the annular disks are gradually reduced from bottom to top; 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. Along with the inner diameter of the plurality of annular disks is gradually reduced from bottom to top, the air quantity of the laminar flow fan can be effectively increased, 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 laminar flow fan of the present invention further 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 invention will be described in detail hereinafter, by way of illustration and not 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 diagram of the overall structure of a laminar flow fan according to one 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 cross-sectional view of a plurality of annular disks of a laminar flow fan in accordance with one embodiment of the present invention;
FIG. 6 is a schematic diagram of the air supply principle of a laminar flow fan according to an embodiment of the present invention;
FIG. 7 is a velocity profile and force profile of a laminar flow fan according to one embodiment of the present invention;
FIG. 8 is a schematic view of the air circulation of a laminar flow fan according to one embodiment of the present invention;
FIG. 9 is a schematic diagram of inner diameter gradient of a plurality of annular disks of a laminar flow fan according to an embodiment of the present invention, and a relationship between air volume and air pressure; and
fig. 10 is a schematic diagram of the relationship between the motor speed and the air volume and the air pressure of the 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 the laminar flow fan 100 in fig. 2 from another view, fig. 4 is a schematic overall structure diagram of the laminar flow fan 100 in fig. 2 from another view, and fig. 5 is a cross-sectional view of a plurality of annular disks 10 of the laminar flow fan 100 according to an embodiment of the present invention. As shown in fig. 2 to 5, 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, and the inner diameters of the plurality of annular disks 10 are gradually reduced from bottom to top. The inventor finds that, through multiple experiments, as the inner diameters of the plurality of annular disks 10 gradually decrease from bottom to top, the air volume of the laminar flow fan 100 can be effectively increased, so that the air outlet of the laminar flow fan 100 meets the use requirements of users. In a preferred embodiment, the inner diameters of two adjacent annular disks 10 vary by the same amount, that is, the inner diameters of the annular disks 10 decrease from bottom to top by the same value. For example, the inner diameters of the 8 annular disks 10 may be set as follows from bottom to top: the inner diameter of each annular disk 10 is reduced by 5mm from the inner diameter of the adjacent annular disk 10 below, by 115 mm, 110 mm, 105 mm, 100 mm, 95 mm, 90 mm, 85 mm, and 80 mm. It should be noted that the specific values of the inner diameter of each annular disk 10 and the variation of the inner diameters of two adjacent annular disks 10 are only exemplary and are not intended to limit the present invention.
The laminar flow fan 100 of the present embodiment can not only be used alone for supplying air, but also, more importantly, the laminar flow fan 100 can be applied to indoor units of various air conditioners, such as a floor air conditioner, a wall air conditioner, and the like. Considering the limited space inherent in the indoor unit of the air conditioner, there is a certain constraint on the overall occupied volume of the laminar flow fan 100. The laminar flow fan 100 of the present embodiment can restrict the number of the annular disks 10, the distance between two adjacent annular disks 10, and the thickness of the annular disks 10, respectively, considering that the thickness is not too large. Furthermore, the laminar flow fan 100 may impose a corresponding constraint on the outer diameter of the annular disk 10 in view of not taking the lateral footprint excessively large. 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.
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 be 170 mm to 180 mm, so as to constrain the occupied volume of the laminar fan 100 in the transverse direction.
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. 6 is a schematic diagram of an air supply principle of the laminar flow fan 100 according to an embodiment of the present invention, and fig. 7 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. 7 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. 7 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. ofeThe velocity of the air flow at each point in the air boundary layer 13, the thickness of the air boundary layer 13, τwIs a ring-shaped disc 10The variable y in τ (y) and u (y) refers to the height of the cross-section of boundary layer 13 in the direction perpendicular to the direction of travel, L is the distance between a point on the inner circumference of annular disk 10 and a point on the surface of annular disk 10, then τ (y) is the distribution of viscous shear forces experienced at distance L where the height of the cross-section of boundary layer 13 is y, and u (y) is the velocity distribution where the height of the cross-section of boundary layer 13 is y at distance L.
Fig. 8 is a schematic view of the air circulation of the laminar flow fan 100 according to one embodiment of the present invention. As shown in fig. 2 to 4 and 8, 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 inner diameters of the plurality of annular disks 10 described above are gradually reduced from bottom to top, which means that the inner diameters of the plurality of annular disks 10 are gradually reduced along the direction of the airflow flowing in the air inlet channel 11.
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. 9 is a schematic diagram of the relationship between the inner diameter gradient of a plurality of annular disks 10 of the annular disk 10 of the laminar flow fan 100 and the air volume and the air pressure according to an embodiment of the present invention. The abscissa axis shading irregular inflow increment refers to the variation of the inner diameter of each annular disk 10 and the inner diameter of the adjacent annular disk 10 below, 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. 9 is a schematic diagram illustrating the relationship between the gradual change of the inner diameter of the plurality of annular disks 10 and the air volume and the air pressure when the outer diameter, the distance, 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 mentioned parameters are all kept unchanged, the inner diameters of the plurality of annular disks 10 gradually change from bottom to top, which has a large influence on the air volume and a small influence on the air pressure. When the variation of the inner diameter of each annular disk 10 and the inner diameter of the adjacent annular disk 10 below is a positive number, the inner diameters of the annular disks 10 are gradually increased from bottom to top; when the variation of the inner diameter of each annular disk 10 represented by the abscissa axis and the inner diameter of the adjacent annular disk 10 below is a negative number, it means that the inner diameters of the plurality of annular disks 10 gradually decrease from bottom to top. As shown in fig. 9, when the inner diameters of the plurality of annular disks 10 gradually decrease from bottom to top, the air volume of the laminar flow fan 100 increases and the air pressure decreases slightly; when the inner diameters of the plurality of annular disks 10 gradually increase from bottom to top, the wind pressure of the laminar flow fan 100 slightly increases, and the wind volume is greatly reduced. Therefore, the inner diameters of the plurality of annular disks 10 are set to be gradually reduced from bottom to top in consideration of the air volume and the air pressure of the laminar flow fan 100. In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the pitch of the annular disks 10 is 13.75 mm, 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 variation between the inner diameter of each annular disk 10 and the inner diameter of the adjacent annular disk 10 below may be set to be-5 mm in consideration of the air volume and the air pressure of the laminar flow fan 100. Namely, the inner diameters of the 8 annular disks 10 can be sequentially set from bottom to top: 115 mm, 110 mm, 105 mm, 100 mm, 95 mm, 90 mm, 85 mm and 80 mm. It should be noted that the distance between the annular disks 10 in the above description specifically refers to the distance between two adjacent annular disks 10. It should be emphasized that the inner diameters of the plurality of annular disks 10 are gradually reduced from bottom to top, which means that the inner diameters of the plurality of annular disks 10 are gradually reduced along the direction of the airflow flowing in the air inlet channel 11.
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. That is, the airflow rate of the same laminar flow fan 100 increases substantially linearly as the rotation speed of the motor 20 increases. In a preferred embodiment, the outer diameter of the annular disk 10 of the laminar flow fan 100 is 175 mm, the number of layers of the annular disk 10 is 8, and the inner diameters of the 8 annular disks 10 are sequentially set from bottom to top as follows: the pitch of the annular disk 10 is 13.75 mm, and when 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: a plurality of annular disks 10 arranged in parallel at intervals and having the same central axis, and the inner diameters of the plurality of annular disks 10 are gradually reduced from bottom to top; 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 inner diameters of the plurality of annular disks 10 gradually decrease from bottom to top, the air volume of the laminar flow fan 100 can be effectively increased, so that the air outlet of the laminar flow fan 100 meets 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, unless otherwise specified, terms such as "upper", "lower", "left", "right", "front", "rear", and the like used in the embodiments of the present invention to indicate orientation or positional relationship are based on the actual use 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 illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the 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, and the inner diameters of the annular disks are gradually reduced from bottom to top; 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, 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.
3. The laminar flow fan according to claim 2, 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.
4. The laminar flow fan according to claim 3, 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.
5. The laminar flow fan according to claim 1,
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.
6. The laminar flow fan according to claim 5,
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 6,
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 2,
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 3,
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045809.9A CN111441967A (en) | 2019-01-17 | 2019-01-17 | Laminar flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045809.9A CN111441967A (en) | 2019-01-17 | 2019-01-17 | Laminar flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111441967A true CN111441967A (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910045809.9A Pending CN111441967A (en) | 2019-01-17 | 2019-01-17 | Laminar flow fan |
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| Country | Link |
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| CN (1) | CN111441967A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441964A (en) * | 2019-01-17 | 2020-07-24 | 青岛海尔空调器有限总公司 | Laminar flow fan |
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