CN113187767B - Air duct structure of bladeless fan and bladeless fan - Google Patents
Air duct structure of bladeless fan and bladeless fan Download PDFInfo
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- CN113187767B CN113187767B CN202110529947.1A CN202110529947A CN113187767B CN 113187767 B CN113187767 B CN 113187767B CN 202110529947 A CN202110529947 A CN 202110529947A CN 113187767 B CN113187767 B CN 113187767B
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an air duct structure of a bladeless fan and the bladeless fan, wherein the air duct structure comprises an air outlet part, an air outlet air duct is formed in the air outlet part, one side of an air duct wall of the air outlet air duct along the length direction is provided with a plurality of air outlets, the other side of the air duct wall of the air outlet air duct, which is away from the air outlets, is provided with an air guide structure, the air guide structure comprises a first air guide section and a second air guide section which are arranged along the air flow direction, the first air guide section is positioned at the upstream of the second air guide section, and the air outlet end of the second air guide section extends to the top of the air outlet air duct; the first air guide section forms an arc surface gradually shrinking towards the central axis of the air outlet duct, and the second air guide section forms an arc surface gradually expanding towards the central axis of the air outlet duct; the air inlet part is provided with an air inlet, the air inlet is communicated with the air outlet channel, and the air inlet end of the first air guide section extends to be connected with the air inlet part. The air duct structure can effectively reduce the pneumatic noise of the bladeless fan and increase the air output.
Description
Technical Field
The invention belongs to the field of bladeless fans, and particularly relates to an air duct structure of a bladeless fan and the bladeless fan.
Background
Compared with the traditional axial flow fan, the bladeless fan in the current market has the advantages that the air outlet airflow is more stable, the impact feeling and the wavy stimulation of the airflow are avoided, the bladeless fan has lower energy consumption, the bladeless fan is designed into the air outlet airflow through a unique air duct to boost and accelerate, and the air outlet airflow drives the airflow in the annular ring under the action of the viscous force of the air, so that the multiplication of the airflow is realized.
In appearance, because the fan blade without the fan is hidden in the fan base, a user cannot directly contact the fan blade, and compared with a traditional fan, the fan is safer, unique in appearance, and more attractive in technology and innovative.
However, bladeless fans are much noisier than conventional fans. Because the blade size of the bladeless fan is smaller, the rotating speed is higher, and the outlet wind speed needs to be increased through the flow passage pressurization, vortex noise can be generated in the air duct.
The present invention has been made in view of this.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing an air duct structure of a bladeless fan and the bladeless fan capable of effectively reducing pneumatic noise.
To solve the above problems, a first object of the present invention is to provide an air duct structure of a bladeless fan, comprising
The air outlet part is internally provided with an air outlet air duct, one side of the air outlet air duct wall along the length direction of the air outlet air duct wall is provided with a plurality of air outlets, the other side of the air outlet air duct wall, which is away from the air outlets, is provided with an air guide structure, the air guide structure comprises a first air guide section and a second air guide section which are arranged along the air flow direction, the first air guide section is positioned at the upstream of the second air guide section, and the air outlet end of the second air guide section extends to the top of the air outlet air duct; the first air guide section forms an arc surface which gradually expands towards the central axis of the air outlet duct, and the second air guide section forms an arc surface which gradually expands towards the central axis of the air outlet duct;
the air inlet part is provided with an air inlet, the air inlet is communicated with the air outlet duct, and the air inlet end of the first air guide section extends to be connected with the air inlet part.
Further optionally, a vertical plane at the air inlet end of the first air guiding section is set as a standard plane, and the distance between the standard plane and the farthest position of the first air guiding section is h 1 The method comprises the steps of carrying out a first treatment on the surface of the The length of the first air guide section is L 1 The distance between the position of the first air guide section farthest from the standard surface and the air inlet end of the first air guide section is L 11 The distance between the first air guide section and the air outlet end of the first air guide section is L 12 ，L 1 ＝L 11 +L 12 The requirements are as follows: h is a 1 /L 1 L is in the range of 0.01 to 0.3 11 /L 1 In the range of 0 to 1.
Further optionally, an included angle between a tangent line of the air inlet end of the first air guide section and a horizontal line is alpha 1 The included angle between the tangent line of the air outlet end and the horizontal line is beta 1 The requirements are as follows: alpha 1 ∈(40°,90°]，β 1 ∈(40°,180°)。
Further optionally, the length of the second air guiding section is L 2 The distance between the standard surface and the second air guide section is h 2 The requirements are as follows: tan (beta) 2 )＜h 2 /L 2 ＜tan(α 2 )。
Further alternatively, the included angle between the tangent line of the air inlet end of the second air guiding section and the horizontal line is alpha 2 The included angle between the tangent line of the air outlet end and the horizontal line is beta 2 ，α 2 ∈(30°,90°]，β 2 ∈(0°,90°)，β 2 ＜α 2 。
Further alternatively, the deflection angle of the second air guiding segment is set to θ, θ=α 2 -β 2 The requirements are as follows: θ∈ (0 °,45 °).
Further optionally, the air guiding structure further includes a transition section, the transition section is parallel to the central axis of the air outlet duct, the air inlet end of the transition section is connected with the air outlet end of the first air guiding section, and the air outlet end is connected with the air inlet end of the second air guiding section.
Further alternatively, the transition section has a length L 3 The requirements are as follows: (L) 2 +L 3 )/(L 1 +L 2 +L 3 ) In the range of 0.3 to 0.7.
Further optionally, the standard surface is separated from the transition section by a distance h 3 ，h 3 ≤h 1 。
Further alternatively, the connection surfaces of the first air guiding section, the second air guiding section and the transition section are wavy wall surfaces, and the wavy wall surfaces are distributed in a sine way.
Further optionally, the width of the air outlet duct is L 4 The amplitude of the wavy wall surface is A, and a sine formula is required to be satisfied: y=asin (npi·x/L) 4 ) Wherein n is an odd number, L 4 Per nA e (0.1,6), curve period is 2L 4 /n。
Further optionally, the air outlet end of the wavy wall surface extends to the air outlet ductThe included angle between the wavy wall surface and the top end surface of the air outlet duct is alpha 3 The requirements are as follows: alpha 3 ＞90°。
Further optionally, the air outlet part comprises two air duct arms, wherein air outlet branch channels are respectively formed in the two air duct arms, the two air outlet branch channels form the air outlet channel, and the air inlet is communicated with the air outlet branch channels;
the air guide structure comprises two air duct arms, wherein the two air duct arms are arranged in a clearance mode, a through air duct is formed in the clearance between the two air duct arms, the air outlets are respectively formed in one sides of the two air duct arms, which face the through air duct, and the air guide structures are respectively formed in one sides of the two air duct arms, which face away from the air outlets.
The second object of the present invention is to provide a bladeless fan having the above air duct structure.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects:
the wind guide structure of the embodiment can effectively eliminate larger vortex in the air duct and reduce vortex noise in the outlet air duct of the bladeless fan; the air flow in the air duct can be stabilized, the flow loss of the bladeless fan is reduced, and the air outlet quantity is improved; the pressure distribution in the air duct can be changed, the pressure at the lower part of the air duct of the bladeless fan is increased, and the air outlet speed of the fan is more uniform.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
fig. 1: the air duct structure schematic diagram is provided in the embodiment of the invention;
fig. 2: is a side view of the air duct structure of the embodiment of the invention;
fig. 3: a first air guide section structure schematic diagram of the air guide structure in the embodiment of the invention;
fig. 4: a second air guide section structure schematic diagram of the air guide structure in the embodiment of the invention;
fig. 5: is a top view of the air duct structure of the embodiment of the invention;
fig. 6: an explosion diagram of the bladeless fan in the embodiment of the invention;
fig. 7: the noise comparison graph of the bladeless fan with the air guide structure and the bladeless fan without the air guide structure under the same air quantity is provided.
Wherein: 1-an air outlet part; 11-an air outlet; 121-a first air guiding section; 122-a second wind guiding section; 123-transition section; 2-an air inlet part; 21-an air inlet; 3-standard surface;
100-base; 200-an air duct structure; 300-a housing; 400-filtering net; 500-an air inlet duct; 600-fan blades; 700-fan blade air-out guiding device.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment provides an air duct structure of a bladeless fan, as shown in fig. 1 and 2, including an air outlet portion 1 and an air inlet portion 2, wherein an air outlet duct is formed in the air outlet portion 1, the air outlet duct has a certain extension length, a plurality of air outlets 11 are formed on the air duct wall of the air outlet duct along the length direction of the air outlet duct, an air guide structure is formed on one side of the air duct wall of the air outlet duct, which is away from the air outlets 11, the air guide structure includes a first air guide section 121 and a second air guide section 122, which are arranged along the air flow direction, the first air guide section 121 is located at the upstream of the second air guide section 122, and the air outlet end of the second air guide section 122 extends to the top of the air outlet duct; the first air guide section 121 is a cambered surface gradually shrinking towards the central axis of the air outlet duct, and the second air guide section 122 is a cambered surface gradually expanding towards the central axis of the air outlet duct; an air inlet 21 is formed in the air inlet part 2, the air inlet 21 is communicated with the air outlet channel, and the air inlet end of the first air guide section 121 extends to be connected with the air inlet part 2. Air in the external environment enters the air outlet channel from the air inlet 21, is guided by the air guide structure and is discharged from the air outlet 11.
The air guiding structure of the embodiment belongs to a part of a bladeless fan air outlet duct, mainly plays a role of pressurization, the first air guiding section 121 is a contraction section, the wall surface arc of the first air guiding section contracts towards the inside of the air duct and then expands, the static pressure of the air duct is reduced by reducing the sectional area of the air duct according to the Bernoulli equation, and the static pressure is increased by expanding the sectional area; the arcuate profile of the wall of the first wind guide section 121 resembles a wing airfoil to attenuate flow separation of the wind tunnel wall. The lower end of the second air guiding section 122 is connected with the expansion end of the contraction section, so that the air flow in the air duct can be guided to change the flow direction, the air flow direction is deflected from vertical to horizontal, the vortex at the top of the air duct is eliminated, the flow loss is reduced, and the air outlet quantity is improved.
The wind guide structure of the embodiment can effectively eliminate larger vortex in the air duct and reduce vortex noise in the outlet air duct of the bladeless fan; the air flow in the air duct can be stabilized, the flow loss of the bladeless fan is reduced, and the air outlet quantity is improved; the pressure distribution in the air duct can be changed, the pressure at the lower part of the air duct of the bladeless fan is increased, and the air outlet speed of the fan is more uniform.
In order to obtain better noise reduction and air output increase effects, the relevant dimensions of the first air guiding section 121 and the second air guiding section 122 are further limited in this embodiment.
As shown in fig. 2 and 3, the included angle between the tangent line of the air inlet end of the first air guiding section 121 and the horizontal line is alpha 1 The included angle between the tangent line of the air outlet end and the horizontal line is beta 1 The requirements are as follows: alpha 1 ∈(40°,90°]，β 1 ∈(40°,180°)。
Further alternatively, a vertical plane at the air inlet end of the first air guiding section 121 is set as a standard plane 3, and the distance between the standard plane 3 and the farthest position of the first air guiding section 121 is set as h 1 The method comprises the steps of carrying out a first treatment on the surface of the The length of the first air guiding section 121 is L 1 The distance between the position of the first air guide section 121 farthest from the standard surface 3 and the air inlet end of the first air guide section 121 is L 11 A distance L from the air outlet end of the first air guiding section 121 12 ，L 1 ＝L 11 +L 12 The requirements are as follows: h is a 1 /L 1 L is in the range of 0.01 to 0.3 11 /L 1 In the range of 0 to 1.
As shown in fig. 2 and 4, the included angle between the tangent line of the air inlet end of the second air guiding section 122 and the horizontal line is α 2 The included angle between the tangent line of the air outlet end and the horizontal line is beta 2 ，α 2 ∈(30°,90°]，β 2 ∈(0°,90°)，β 2 ＜α 2 。
Further alternatively, the deflection angle of the second air guiding segment 122 is set to θ, θ=α 2 -β 2 The requirements are as follows: θ∈ (0 °,45 °).
Further alternatively, the second air guiding section 122 has a length L 2 The standard surface 3 is furthest from the second air guiding section 122 by a distance h 2 The requirements are as follows: tan (beta) 2 )＜h 2 /L 2 ＜tan(α 2 )。
As shown in fig. 1 and fig. 2, the air guiding structure further includes a transition section 123, the transition section 123 is parallel to the central axis of the air outlet duct, the air inlet end of the transition section 123 is connected to the air outlet end of the first air guiding section, and the air outlet end is connected to the air inlet end of the second air guiding section 122.
Further optionally, passingThe length of the transition section 123 is L 3 The requirements are as follows: (L) 2 +L 3 )/(L 1 +L 2 +L 3 ) In the range of 0.3 to 0.7.
Further alternatively, the standard surface 3 is spaced from the transition 123 by a distance h 3 ，h 3 ≤h 1 。
The connection surfaces of the first air guiding section, the transition section and the second air guiding section in this embodiment are wave-shaped wall surfaces, as shown in fig. 5, and the wave-shaped wall surfaces are sinusoidally distributed. The wavy wall surface can divide the airflow, so that the airflow can flow more stably, and the formation of vortex is reduced.
In order to obtain better vortex reduction effect, the width of the air outlet duct is L 4 The amplitude of the wavy wall surface is A, and a sine formula is required to be satisfied: y=asin (npi·x/L) 4 ) Wherein n is an odd number, L 4 Per nA e (0.1,6), curve period is 2L 4 /n。
Further alternatively, the air outlet end of the wavy wall surface extends to the top end of the air outlet duct, and the included angle between the wavy wall surface and the top end surface of the air outlet duct is alpha 3 The requirements are as follows: alpha 3 > 90 deg.. The air guide structure of the embodiment can reduce the use noise of the bladeless fan, improve the tone quality and improve the user experience; the air outlet quantity is increased, and the performance of the whole machine is improved; the air outlet is more uniform, and the air supply range is enlarged. The air quantity and noise of the bladeless fan with the air guide mechanism and the bladeless fan without the air guide mechanism under different rotating speeds are tested, and the test results are shown in the following table:
meanwhile, the inventor also tests the noise of the bladeless fan with the air guide mechanism and the bladeless fan without the air guide mechanism at different rotating speeds under the same air quantity, and the noise of the bladeless fan with the air guide mechanism and the bladeless fan without the air guide mechanism are tested under the same air quantity (124 m 3 The noise comparison results at/h) are shown in FIG. 7.
From the above test structure, the noise is reduced by about 2.5dB under the same air quantity, and the noise is reduced under the same air quantityQuantity lifting of 20m 3 About/h, 15% -20% of the improvement is achieved. Therefore, the air guide structure of the embodiment has obvious effects of improving the air quantity and reducing the air outlet noise. The bladeless fan of the embodiment is provided with the air guide structure in the air outlet air duct, the air duct at the lower part of the air duct is contracted and expanded, the arc-shaped guide plate is designed at the top, and the wavy wall surface is adopted. The novel air guide structure can adjust the upper pressure distribution and the lower pressure distribution of the air duct and eliminate large vortex in the air duct, so that the air quantity is improved, the air is evenly discharged, the air supply range is enlarged, and the pneumatic noise is reduced.
Further alternatively, the air outlet part 1 comprises two air duct arms, wherein air outlet branch channels are respectively formed in the two air duct arms, the two air outlet branch channels form an air outlet channel, and the air inlet 21 is communicated with the air outlet branch channels; the two air duct arms are arranged in a clearance way, a through air duct is formed in the clearance between the two air duct arms, the air outlets 11 are respectively formed in one sides of the two air duct arms facing the through air duct, and air guiding structures are respectively formed in one sides of the two air duct arms facing away from the air outlets 11.
The embodiment also provides a bladeless fan, which is provided with the air duct structure. As shown in the exploded view of the whole bladeless fan shown in fig. 6, the whole structure mainly comprises a base 100, a shell 300, a filter screen 400, an air duct structure 200, fan blades 600, a fan blade air outlet flow guiding device 700, an air inlet duct 500 and other structures; the air outlet part 1 and the air inlet part 2 are integrally formed on the base 100.
The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.
Claims (11)
1. An air duct structure of a bladeless fan, comprising
The air outlet part is internally provided with an air outlet air duct, one side of the air duct wall of the air outlet air duct is provided with a plurality of air outlets along the vertical length direction, one side of the air duct wall of the air outlet air duct, which is away from the air outlets, is provided with an air guide structure, the air guide structure comprises a first air guide section and a second air guide section, which are arranged along the up-down airflow direction, the first air guide section is positioned at the upstream of the second air guide section, and the downstream air outlet end of the second air guide section extends to the top of the air outlet air duct; the first air guide section is contracted and then expanded towards the inside of the air duct along the upper and lower air flow direction in an arc shape, and the second air guide section is an arc surface and guides the air flow in the air duct to change the flow direction so as to deflect the air flow towards the horizontal direction; the air guide structure further comprises a transition section, the transition section is parallel to the vertical length direction, the upstream air inlet end of the transition section is connected with the downstream air outlet end of the first air guide section, the downstream air outlet end of the transition section is connected with the upstream air inlet end of the second air guide section, the first air guide section, the second air guide section and the transition section are in a wave-shaped structure along the horizontal direction, and the middle position of the wave-shaped structure is protruded into the air outlet duct;
the air inlet part is provided with an air inlet, the air inlet is communicated with the air outlet duct, and the upstream air inlet end of the first air guide section extends to be connected with the air inlet part.
2. The bladeless fan duct structure of claim 1, wherein a vertical plane at an upstream air intake end of said first air guide section is defined as a standard plane, and a furthest horizontal distance from said first air guide section is defined as h 1 The method comprises the steps of carrying out a first treatment on the surface of the The vertical length of the first air guide section is L 1 The vertical distance between the position of the first air guide section farthest from the standard surface and the upstream air inlet end of the first air guide section is L 11 The vertical distance between the first air guide section and the downstream air outlet end of the first air guide section is L 12 ，L 1 ＝L 11 +L 12 The requirements are as follows: h is a 1 /L 1 0.01 to 0.3Within the range L 11 /L 1 In the range of 0 to 1.
3. The air duct structure of a bladeless fan as recited in claim 2, wherein an included angle between a tangent line of an upstream air inlet end of the first air guiding section and a horizontal line extending toward the air outlet is α 1 The included angle between the tangent line of the downstream air outlet end and the horizontal line extending towards the air outlet direction is beta 1 The requirements are as follows: alpha 1 ∈(40°,90°]，β 1 ∈(40°,180°)。
4. A bladeless fan duct structure according to claim 2 or 3, wherein the angle between the tangent to the upstream air inlet end of the second air guide section and the horizontal line extending in the direction of the air outlet is α 2 The included angle between the tangent line of the downstream air outlet end and the horizontal line extending towards the air outlet direction is beta 2 ，α 2 ∈(30°,90°]，β 2 ∈(0°,90°)，β 2 <α 2 。
5. The bladeless fan duct structure of claim 4, wherein the second air guiding section has a vertical length L 2 The farthest horizontal distance between the standard surface and the second air guide section is h 2 The requirements are as follows: tan (beta) 2 )<h 2 /L 2 <tan(α 2 )。
6. The air duct structure of vaneless fan according to claim 5, wherein the deflection angle of the second air guiding section is set to θ, θ=α 2 -β 2 The requirements are as follows: θ∈ (0 °,45 °).
7. The bladeless fan duct structure of claim 6, wherein the transition section has a vertical length L 3 The requirements are as follows: (L) 2 +L 3 )/(L 1 +L 2 +L 3 ) In the range of 0.3 to 0.7.
8. The bladeless fan duct structure of claim 7, wherein the standard surface is horizontally spaced from the transition section by a distance h 3 ，h 3 ≤h 1 。
9. The bladeless fan duct structure of claim 1, wherein the undulating configuration is sinusoidal.
10. The bladeless fan duct structure of claim 1, wherein,
the air outlet part comprises two air duct arms, an air outlet branch channel is formed in each air duct arm, the two air outlet branch channels form an air outlet channel, and the air inlet is communicated with the air outlet branch channel;
the two air duct arms are arranged in a clearance mode.
11. A bladeless fan having a duct structure according to any one of claims 1 to 10.
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| CN202110529947.1A CN113187767B (en) | 2021-05-14 | 2021-05-14 | Air duct structure of bladeless fan and bladeless fan |
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| JP2013036460A (en) * | 2011-07-13 | 2013-02-21 | Panasonic Corp | Cool breeze machine |
| CN106762852A (en) * | 2016-11-15 | 2017-05-31 | 美的集团股份有限公司 | Fan head and bladeless fan |
| CN206269336U (en) * | 2016-11-03 | 2017-06-20 | 奥克斯空调股份有限公司 | A kind of air conditioner air deflector |
| CN207847976U (en) * | 2017-12-19 | 2018-09-11 | 广东美的环境电器制造有限公司 | It is a kind of for the fan head assembly of no leaf blowing apparatus and without leaf blowing apparatus |
| CN109931293A (en) * | 2017-12-19 | 2019-06-25 | 广东美的环境电器制造有限公司 | Bladeless fan and its head |
| CN111380197A (en) * | 2020-04-14 | 2020-07-07 | 宁波奥克斯电气股份有限公司 | Air guide assembly and air conditioner |
| CN211550083U (en) * | 2020-01-19 | 2020-09-22 | 广东美的环境电器制造有限公司 | Air supply device |
-
2021
- 2021-05-14 CN CN202110529947.1A patent/CN113187767B/en active Active
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| JP2013036460A (en) * | 2011-07-13 | 2013-02-21 | Panasonic Corp | Cool breeze machine |
| CN206269336U (en) * | 2016-11-03 | 2017-06-20 | 奥克斯空调股份有限公司 | A kind of air conditioner air deflector |
| CN106762852A (en) * | 2016-11-15 | 2017-05-31 | 美的集团股份有限公司 | Fan head and bladeless fan |
| CN207847976U (en) * | 2017-12-19 | 2018-09-11 | 广东美的环境电器制造有限公司 | It is a kind of for the fan head assembly of no leaf blowing apparatus and without leaf blowing apparatus |
| CN109931293A (en) * | 2017-12-19 | 2019-06-25 | 广东美的环境电器制造有限公司 | Bladeless fan and its head |
| CN211550083U (en) * | 2020-01-19 | 2020-09-22 | 广东美的环境电器制造有限公司 | Air supply device |
| CN111380197A (en) * | 2020-04-14 | 2020-07-07 | 宁波奥克斯电气股份有限公司 | Air guide assembly and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113187767A (en) | 2021-07-30 |
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