Fan

Abstract

The present invention provides a fan, comprising: a body portion including an air inlet hood having an air inlet, a fan motor assembly for generating an air flow, and an air outlet, the air flow sequentially passing through the air inlet hood and the fan motor assembly in a first direction, the air inlet hood being disposed upstream of the air inlet of the fan motor assembly, and a plurality of circumferentially distributed and spaced wave-shaped turbulators being provided on the outer periphery of the air inlet hood in the first direction, the wave-shaped turbulators extending from the outer periphery of the air inlet hood towards the center, and the gaps between adjacent wave-shaped turbulators forming an air inlet passage arranged in a vortex pattern; and a nozzle connected to the air outlet for receiving the air flow from the body portion and emitting the air flow, and as the air flow enters the nozzle, the air flow is emitted from the nozzle after moving at least based on a second direction opposite to the first direction. The present invention can change the movement direction of the air flow in the fan, reduce the overall height of the fan, reduce the overall volume, extend the service life of the filter screen, and reduce the use cost.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning equipment, in particular to a fan. Background Art

[0002] With the continuous improvement of living and technological levels, people's requirements for quality of life are increasing. Indoor air quality has become an important issue of concern to people, and people's demand for air purifiers is also increasing.

[0003] Air purifiers are small household appliances used to purify indoor air, mainly to solve indoor air pollution problems caused by decoration or other reasons. Since the release of pollutants in indoor air is persistent and uncertain, using air purifiers to purify indoor air is an internationally recognized method to improve indoor air quality. There are many different technologies and media in air purifiers, which enable it to provide clean and safe air to users. Commonly used air purification technologies include: low-temperature asymmetric plasma air purification technology, adsorption technology, negative ion technology, negative oxygen ion technology, molecular complexation technology, nano-TiO2 technology, HEPA high-efficiency filtration technology, electrostatic dust collection technology, active oxygen technology, etc.; material technologies mainly include: photocatalyst, activated carbon, synthetic fiber, HEPA high-efficiency material, etc. The cost of high-quality filters will account for 20% to 30% of the total cost of air purifiers.

[0004] At present, there are many bladeless fans with air filters. Figure 1 FIG. 4 is a cross-sectional view of a bladeless fan in the prior art. Figure 1 As shown, most of them have an annular nozzle 901, a housing 903, a bottom 904, a filter 905, a fan motor 906 and a mesh liner 907. Among them, the housing 903 with an air inlet mesh is arranged on the bottom 904, the housing 903 is provided with a filter 905, the filter 905 is provided with a mesh liner 907, the mesh liner 907 is provided with a first air inlet of the fan motor 906, and the annular nozzle 901 is arranged above the gravity direction of the fan motor 906, and the air outlet of the fan motor 906 is connected to the annular nozzle 901. The indoor air passes through the mesh of the housing 903 and the filter 905 in turn and then enters the mesh liner 907. The air inlet of the fan motor 906 inhales the air in the anti-gravity direction and then continues to transport it to one end of the annular nozzle 901 in the anti-gravity direction (vertically upward), and then the air is spread to various places of the annular nozzle 901 and then ejected.

[0005] There are at least the following technical problems in this structure that need to be improved:

[0006] (1) Since the annular nozzle with the largest overall volume of the bladeless fan and the fan motor must be arranged at different height positions in the direction of gravity, it is difficult to reduce the overall height of the bladeless fan, which greatly limits the usage scenarios of the bladeless fan.

[0007] (2) The middle of the annular nozzle is hollow, and this area is not fully utilized, resulting in a waste of the overall volume of the fan and an increase in the costs of product transportation and product storage.

[0008] (3) Since the air inlet position of the fan motor is relatively low, it is easier to inhale dust on the ground during inhalation, increasing the usage load of the filter screen and requiring more frequent replacement of the filter screen, significantly increasing the usage cost of the bladeless fan.

[0009] (4) The housing of this type of bladeless fan is a structure in which two housings are horizontally joined. Each housing is provided with a filter screen. The filter screen is sealed between the mesh inner liner and the three-dimensional sealing rubber strip provided downstream. The cost of the three-dimensional sealing rubber strip is extremely high, and the sealing effect is poor after long-term use.

[0010] (5) When replacing the filter screen, it is necessary to separately disassemble the two housings, replace the filter screens respectively, and then reinstall them. The process is cumbersome and the user experience is poor.

[0011] (6) It is difficult to add other functional modules to the product, and the expandability is poor.

[0012] Therefore, the present invention provides a fan. Summary of the Invention

[0013] Aiming at the problems in the prior art, the purpose of the present invention is to provide a fan, which overcomes the problems in the prior art, can change the movement direction of the air flow inside the fan, reduce the overall height of the fan, reduce the overall volume, extend the service life of the filter screen, and reduce the usage cost.

[0014] An embodiment of the present invention provides a fan, including:

[0015] A body portion, including an air inlet cover having an air inlet, a fan motor assembly for generating an air flow, and an air outlet. The air flow sequentially passes through the air inlet cover and the fan motor assembly in a first direction. The air inlet cover is arranged upstream of the air inlet of the fan motor assembly. A plurality of circumferentially distributed and spaced-apart corrugated turbulators are provided on the outer periphery of the air inlet cover in the first direction. The corrugated turbulators extend from the outer periphery of the air inlet cover towards the center, and the gaps between adjacent corrugated turbulators form an intake passage arranged in a vortex pattern; and

[0016] A nozzle, connected to the air outlet, is configured to receive an air flow from the body part and emit the air flow. As the air flow enters the nozzle, the air flow moves at least based on a second direction opposite to the first direction and is then emitted from the nozzle.

[0017] Preferably, the interior of the air inlet cover is hollow to form a vortex channel. The first end of the vortex channel is circumferentially connected to the air inlet channel perpendicular to the first direction, and the second end of the vortex channel is connected to the air inlet of the fan motor assembly in the second direction.

[0018] Preferably, along the connection direction of the air inlet channel, an air inlet exposed to the outer periphery of the air inlet cover and a narrow slit connecting the vortex channel are respectively provided at both ends of the air inlet channel.

[0019] Preferably, along the connection direction of the air inlet channel, the flow area of the air inlet channel is smaller the closer it is to the vortex channel; the flow area of the air inlet channel is larger the closer it is to the air inlet.

[0020] Preferably, a rotating impeller is provided inside the fan motor assembly, and the wave convex direction of each wave-shaped spoiler is consistent with the rotation direction of the impeller.

[0021] Preferably, the angles at which each air inlet channel enters the vortex channel are different.

[0022] Preferably, a concave arc-shaped notch is provided on one side of each wave-shaped spoiler facing the air inlet of the fan motor assembly.

[0023] Preferably, the body part further includes a filter, which surrounds the air inlet cover and is arranged upstream of the air inlet of the air inlet cover.

[0024] Preferably, the filter is a tubular air filter screen. The fan further includes a top cover pressing one side of the tubular air filter screen in the first direction and an air inlet bracket supporting the other side of the tubular air filter screen in the second direction. The annular upper end surface of the tubular air filter screen is sealed with the top cover, and the annular lower end surface of the tubular air filter screen is sealed with the air inlet bracket.

[0025] Preferably, the first direction is the direction of gravity, and the second direction is the anti-gravity direction.

[0026] The fan of the present invention can change the movement direction of the air flow inside the fan, reduce the overall volume, and lower the usage cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objectives, and advantages of the present invention will become more apparent.

[0028] Figure 1 It is a sectional view of a bladeless fan of the prior art.

[0029] Figure 2 It is a schematic diagram of the internal air duct of the fan of the present invention.

[0030] Figure 3 It is Figure 2 a sectional view taken along the line A-A in

[0031] Figure 4 It is a schematic diagram of the fan connection function module of the present invention.

[0032] Figure 5 It is a perspective view of the fan of the present invention.

[0033] Figure 6 It is Figure 5 a sectional view taken along the line B-B in

[0034] Figure 7 It is Figure 5 a sectional view taken along the line C-C in

[0035] Figure 8 It is an exploded view of the fan of the present invention.

[0036] Figure 9 It is a partial exploded view of an embodiment of the fan of the present invention.

[0037] Figure 10 It is a perspective view of an air inlet of the fan of the present invention.

[0038] Figure 11 It is a schematic diagram of an air inlet of the fan of the present invention.

[0039] Figure 12 It is Figure 11 a sectional view taken along the line D-D in

[0040] Figure 13 It is a perspective view of the fan motor assembly in the fan of the present invention.

[0041] Figure 14 It is Figure 13 a sectional view taken along the line E-E in

[0042] Figure 15 It is an exploded view of the fan motor assembly in the fan of the present invention.

[0043] Figure 16 It is a perspective view of the air outlet three-way seat in the fan motor assembly of the fan of the present invention.

[0044] Figures 17 to 20 It is a schematic diagram of the installation process of the fan of the present invention.

[0045] Reference numerals

[0046] 10 Body 51 Air guide mask

[0047] 11 Top cover 52 Air guide hood

[0048] 111 Positioning buckle 521 Third positioning seat

[0049] 112 First terminal 522 Second screwing ear

[0050] 12 Ring connecting frame 523 Connecting groove

[0051] 121 Positioning slot 53 Impeller

[0052] 122 Screw hole 54 Motor bracket

[0053] 13 Side support frame 541 Second positioning seat

[0054] 14 Intake bracket 55 Positioning damping pad

[0055] 141 Connecting post 56 Motor

[0056] 2 Filter 57 Motor sound-absorbing cotton

[0057] 21 First annular seal 58 Motor cover

[0058] 22 First annular support frame 59 Sealing ring

[0059] 23 Tubular air filter 6 Base part

[0060] 24 Second annular support frame 61 Power supply box upper cover

[0061] 25 Second annular seal 62 Power board

[0062] 3 Intake hood 63 Rotating synchronous motor

[0063] 31 Intake port 64 Rotating bracket

[0064] 32 Wave-shaped spoiler 65 Base

[0065] 33 Intake channel 66 Base cover

[0066] 34 Vortex channel 7 Nozzle

[0067] 35 Concave arc notch 70 Nozzle body

[0068] 4 Inner shell 71 Air outlet

[0069] 41 Semi-circular limit groove 72 First air inlet

[0070] 42 Screw hole 73 Second air inlet

[0071] 43 First buckle 74 Annular shoulder

[0072] 5 Fan motor assembly 75 Accommodating space

[0073] 50 Air outlet tee seat 8 Housing

[0074] 501 First positioning seat 8A First side

[0075] 502 Diverting wall 8B Second side

[0076] 503 Sunken flow guiding step 81 Air inlet hole

[0077] 504 First air outlet 82 Semi-circular fitting part

[0078] 505 Second air outlet 83 Screw hole

[0079] 506 Flow guiding vane 84 Second buckle

[0080] 507 Air inlet 9 Functional expansion part

[0081] 508 First screwing ear 91 Second contact terminal Detailed implementation manners

[0082] The example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus their repetitive description will be omitted.

[0083] Figure 2 It is a schematic diagram of the internal air duct of the fan of the present invention. Figure 3 is Figure 2 a cross-sectional view taken along the line A-A in Figure 2 and 3 As shown in Figure 17)An air inlet 81 is provided, and the filter 2 is disposed at a corresponding position inside the air inlet 81 in the housing 8. The filter 2 is disposed upstream of the air inlet hood 3, and the filter 2 surrounds the air inlet hood 3. The air inlet hood 3 is disposed at the air inlet of the fan motor assembly 5. The fan motor assembly 5 causes an air flow to pass through the body portion 10 in a first direction W, and the first direction W is the direction of gravity. The nozzle 7 is connected to the air outlet and is configured to receive the air flow from the body portion 10 and eject the air flow. As the air flow enters the nozzle 7, the air flow is ejected from the nozzle 7 after moving at least based on a second direction X opposite to the first direction W, and the second direction X is the anti-gravity direction. The air inlet is disposed at the air inlet hood 3, and the air inlet hood 3 is located at the upper part of the body portion 10 along the direction of gravity. The air outlet is located at the lower part of the second side 8B of the housing 8 of the body portion 10 (see Figure 17 ) along the direction of gravity, and the fan motor assembly 5 is located in the area between the air inlet and the air outlet positions. The nozzle 7 has at least one output air duct, and the extending direction of the output air duct is parallel to the first direction W, and the air flow passes through the output air duct in the second direction X. The fan of the present invention has a completely different air duct design from the prior art, inverts the air suction direction of the fan motor assembly 5, performs high air suction from the upper part of the body portion 10, and after the air flow passes through the fan motor assembly 5 from top to bottom, the air flow is exhausted from the lower part of the body portion 10 into the nozzle 7, and then the air flow flows from bottom to top through the nozzle 7 and can be ejected from the air outlet 71 at different heights of the nozzle 7. The present invention overlaps the position layout of the fan motor assembly 5 and the position layout of the nozzle 7 in the first direction, further reducing the overall height and making full use of the idle space in the center of the nozzle 7. Moreover, on the premise of the same height, the present invention can implement a larger nozzle 7 to enhance the air supply capacity.

[0084] In a variant, the nozzle 7 may be a tubular member extending in the vertical direction disposed on one side of the body portion 10, and the lower section of the tubular member is rotatably connected to the opening of the body portion 10.

[0085] In the present invention, the nozzle 7 and the fan motor assembly 5 can be arranged in parallel along the first direction W (or the second direction X), and the projections of the nozzle 7 and the fan motor assembly 5 on the same vertical plane at least partially overlap. This enables the air outlet 71 of the nozzle 7 to be set at the same level as the fan motor assembly 5, or even at a level lower than that of the fan motor assembly 5. By improving the air duct, the present invention divides the long air flow path in the prior art, where the air flow passes through the fan motor assembly and the nozzle in sequence in a single direction, into at least two short air flow paths in opposite directions. The two short air flow paths can be parallel to each other, thus breaking through the industry technical barrier that the fan motor assembly and the nozzle must be arranged in sequence in the height direction, greatly reducing the overall height of the fan, lowering the center of gravity of the product, and improving the stability of the standing posture of the product. Moreover, when the air inlet at the upper position sucks air, it will not suck the dust on the ground, reducing the use load of the filter screen, eliminating the need to frequently replace the filter screen, and greatly reducing the use cost of the filter screen of the bladeless fan.

[0086] The air outlet of the fan motor assembly 5 is connected to two guiding air ducts, and the guiding air ducts are respectively communicated with the openings on both sides of the body 10. The nozzle 7 has a semi-frame-shaped nozzle body 70, and the nozzle body 70 straddles the first side surface of the body 10 facing the first direction W, and both ends of the nozzle body 70 are respectively communicated with the openings. The body 10 has at least one guiding air duct for changing the flow direction of the air flow, and the guiding air duct extends along the third direction Y perpendicular to the first direction W, and is respectively communicated with the air outlet of the fan motor assembly 5 and the nozzle 7. In this embodiment, the fan motor assembly 5, the guiding air duct and the nozzle 7 together form at least one U-shaped combined air duct, but it is not limited thereto.

[0087] The shape of the nozzle body 70 is an inverted U shape, and the nozzle body 70 can rotate by a certain angle relative to the body 10 with the axis of the opening of the body 10 as the rotation axis, so as to blow air in different directions. After rotation, although the air flow flowing along the nozzle body 70 is obliquely flowing (based on the vertical plane), as the air flow enters deeper into the nozzle body 70, the air flow will still generate a displacement in the second direction X (anti-gravity direction). The nozzle body 70 is provided with at least one air outlet 71 opening along the fourth direction Z, and the fourth direction Z is perpendicular to the plane formed by the first direction W and the third direction Y. The air outlets 71 of the nozzle body 70 form an inverted U-shaped air duct in combination, and the air inlet of the body 10 is located within the range of the inverted U-shaped air duct.

[0088] In a preferred example, the nozzle body 70 has a first state where it straddles the first side of the body 10 facing the first direction, and a second state where, after rotation based on the opening, the nozzle body 70 avoids the projection area of the filter 2 in the second direction. The filter 2 has a lifting stroke of moving in and out of the body 10 along the second direction while avoiding the nozzle body 70 in the second direction. The projection of the lifting stroke of the filter 2 in the second direction does not overlap with the projection of the second state of the nozzle body 70 in the second direction, so that the filter 2 can be disassembled along the second direction X and removed from the body 10.

[0089] In a preferred example, the accommodation space 75 has two replacement channels for the filter 2 to enter and exit the accommodation space 75 (the U-shaped nozzle body 70 naturally has two super-large openings communicating with the internal accommodation space 75). The extension direction of the replacement channels is perpendicular to the second direction. The filter 2 has a first stroke of moving in and out of the accommodation space 75 from the body 10 along the second direction, and a second stroke of moving in and out of the accommodation space 75 from the replacement channels. The height of the accommodation space 75 and the height J of the replacement channels are both greater than the height K of the filter 2, and the width of the accommodation space 75 and the width of the replacement channels are both greater than the width of the filter 2.

[0090] Figure 4 It is a schematic diagram of the fan connection function module of the present invention. As Figure 4 shown, in the present invention, not only can the body 10 be integrally arranged in the central area of the nozzle body 70, but also the different structural layouts of this area can be more fully developed to strengthen the expansion function of the fan. The module with the function expansion and the body 10 are jointly arranged in the central area of the nozzle body 70. A accommodation space 75 is formed by enclosing between the first side of the fan of the present invention facing the first direction W and the first side of the nozzle body 70. The accommodation space 75 is provided with a first terminal 112. The fan of the present invention further includes at least one function expansion part 9, which is arranged in the accommodation space 75, and the second contact terminal 91 of the function expansion part 9 is electrically connected to the first terminal 112. For example, the first side of the body 10 is provided with the first terminal 112, and the first side of the body 10 supports the lower surface of the function expansion part 9. The second contact terminal 91 is arranged on the lower surface of the function expansion part 9, and the second contact terminal 91 is butt-connected and electrically connected to the first terminal 112 along the second direction X. In a preferred example, the second contact terminal 91 is connected to the power supply circuit board of the fan base through a wire, but not limited thereto.

[0091] In this embodiment, the function expansion member 9 is one of the following: an electronic humidifier; an electronic aromatherapy machine, an LED lamp, an electronic mosquito repellent, an electronic display screen, a charging stand for charging a mobile terminal, but not limited thereto. The function expansion member 9 may be a spraying member, and the exhaust port of the spraying member is exposed in the accommodating space 75, and the air flow ejected from the nozzle 7 passes through the exhaust port of the spraying member, but not limited thereto. In a preferred solution, Coandă surfaces are provided at the air outlet openings distributed along the nozzle, and a air duct is formed through the Coandă surfaces from the first side of the nozzle body 70 through the accommodating space 75 in the nozzle body 70 to the second side of the nozzle body 70. This air duct drives a part of the air on one side of the nozzle body 70 to move towards the side where the nozzle body 70 discharges air. The exhaust port of the spraying member is arranged within the range of the air duct formed by the air outlet openings. This part of the air passing through the nozzle body 70 flows through the exhaust port of the spraying member, and mixes the functional gas discharged from the spraying member into the air flow ejected by the fan. For example: the function expansion member 9 is an electronic humidifier, and the air flow ejected from the nozzle 7 passes through the exhaust port of the electronic humidifier. The inner circumference of the nozzle 7 is provided with air outlet openings opening to the same side, and the air outlet openings are provided with Coandă surfaces, which drive a part of the air on one side of the nozzle body 70 to move towards the side where the nozzle body 70 discharges air. This part of the air passing through the nozzle body 70 flows through the exhaust port of the electronic humidifier, making the overall air flow ejected by the fan more humid, realizing the functional combination of the electronic humidifier and the fan, and enhancing the humidifying effect of the fan. Similarly, the function expansion member 9 may also be an electronic aromatherapy machine, and the air flow ejected from the nozzle 7 passes through the exhaust port of the electronic aromatherapy machine. The air outlet openings with Coandă surfaces can also be used, enabling the functional combination of the electronic aromatherapy machine and the fan, and enhancing the effect of improving the room odor of the fan, which will not be elaborated here. The shape of the nozzle body 70 in the present invention can not only provide a channel for replacing the filter without moving the nozzle body 70; but also helps to mix more functional gas of the spraying member into the air flow ejected by the fan by means of the continuous Coandă surfaces formed by the circumferentially arranged air outlet openings, realizing the combination of functions.

[0092] Figure 5 Is a perspective view of the fan of the present invention. Figure 6 is Figure 5 The sectional view taken along line B-B in. Figure 7 is Figure 5 The sectional view taken along line C-C in. Figure 8 Is an exploded view of the fan of the present invention. As Figures 5 to 8As shown in the figure, in a preferred embodiment of the present invention, the body of the fan of the present invention includes a base portion 6 arranged from bottom to top along the second direction X, a fan motor assembly 5 for generating an air flow, an air intake bracket 14, an air intake hood 3 providing an air inlet, a filter 2, and a top cover 11. Among them, the base portion 6 includes an upper cover 61 of the power supply box, a power supply board 62, a rotary synchronous motor 63, a rotary bracket 64, a base 65, and a base cover 66. By rotating the rotary synchronous motor 63, the upper components supported by the upper cover 61 of the power supply box, such as the fan motor assembly 5 and the nozzle 7 of the air intake hood 3, can rotate horizontally in place. By making full use of the central area of the idle nozzle 7 in the prior art, the present invention integrally arranges the body 10 in the central area of the nozzle 7, and the air inlet of the body 10 is located within the range of the inverted U-shaped air duct, so that the volume of the product is greatly reduced, and the costs of product transportation and product storage are reduced.

[0093] Two inner shells 4 that can be mutually engaged snap onto both sides of the fan motor assembly 5 and the base portion 6. After the inner shells 4 are engaged and screwed together, the fan motor assembly 5 is limited above the base portion 6. And on the side walls at both ends of each inner shell 4, there are first buckles 43, screw holes 42, and semicircular limiting grooves 41 with exposed openings. After the two inner shells 4 are engaged, an annular groove is formed. On the inner sides at both ends of the nozzle body 70, a first air inlet 72 and a second air inlet 73 are respectively arranged, and the first air inlet 72 and the second air inlet 73 are each connected to an opening.

[0094] Two outer shells 8 that can be mutually engaged are snapped onto the outer periphery of the inner shell 4. The outer shells 8 cover the air intake hood 3 and the fan motor assembly 5. In the area of each outer shell 8 corresponding to the air intake hood 3, there are mesh-shaped air intake holes 81. On the side walls at both ends of the outer shell 8, there are second buckles 84, semicircular splicing parts 82, and screw holes 83. The second buckles 84 of the outer shell 8 are respectively snapped onto the first buckles 43 of the inner shell 4.

[0095] The lower surfaces of two side support frames 13 are connected to the air intake bracket 14. The upper surfaces of the side support frames 13 and the screw holes 83 at the upper ends of the butted outer shells 8 are connected together through the screw holes 122 of an annular connecting frame 12. A positioning card slot 121 is arranged inside the annular connecting frame 12. The height of the outer shell 8 is greater than the height of the fan motor assembly 5. A space for accommodating the filter 2 and the air intake hood 3 is provided between the upper two side support frames 13 of the surrounded outer shell 8. A connecting column 141 is arranged on the lower surface of the air intake bracket 14, and a connecting groove 523 is arranged on the outer periphery of the fan motor assembly 5. The connecting column 141 is inserted into the connecting groove 523, and the air intake hood 3 is connected to the upper surface of the air intake bracket 14, so that the air intake hood 3 can be connected to the air inlet of the fan motor assembly 5 through the air intake bracket 14.

[0096] The filter 2 surrounds the air intake hood 3, and the filter 2 is arranged upstream of the air inlet of the air intake hood 3. The filter 2 is a tubular air filter screen 23 (see Figure 20), a first side of the tubular air filter 23 is provided with a fixed first annular seal 21 (see Figure 20 ) of the first annular support frame 22 (see Figure 20 ), a slot is provided on the lower surface of the top cover 11, and the slot of the top cover 11 is detachably engaged with the first annular support frame 22.

[0097] The lower surface of the top cover 11 is provided with a positioning buckle 111 which is detachably engaged with the positioning slot 121 of the annular connecting frame 12 by rotation. When the top cover 11 is engaged in the annular connecting frame 12, the top cover 11 and the air intake bracket 14 clamp the upper and lower end surfaces of the filter 2. The second side of the tubular air filter 23 is provided with a fixed second annular seal 25 (see Figure 20 ) of the second annular support frame 24 (see Figure 20 ). The second annular support frame 24 is connected to the air intake bracket 14. The first side of the tubular air filter 23 is sealed with the top cover 11 through the first annular seal 21, and the second side of the tubular air filter 23 is sealed with the air intake bracket 14 through the second annular seal 25. The material of the first annular seal 21 and the second annular seal 25 is preferably a slow rebound sponge. The medium of the tubular air filter 23 can be an existing air filter material or an air filter material invented in the future, but is not limited thereto.

[0098] Figure 9 A partial exploded view of a fan according to an embodiment of the present invention. Figure 10 The present invention is a three-dimensional diagram of an air inlet in the fan. Figure 11 The figure is a schematic diagram of an air inlet in the fan of the present invention. Figure 12 yes Figure 11 Cross-sectional view along the DD axis. Figures 9 to 12As shown, the body 10 of the fan of the present invention is provided with an air inlet hood 3 having an air inlet. The air inlet hood 3 is disposed downstream of the filter 2. The air inlet hood 3 is disposed in the annular region defined by the filter 2, and the air flow filtered by the filter 2 enters the fan motor assembly 5 through the air inlet hood 3. For the fan motor assembly 5, the air inlet hood 3 is disposed upstream of the air inlet of the fan motor assembly 5, and the air inlet hood 3 can disturb the air flow entering the fan motor assembly 5 to reduce noise. The outer periphery of the air inlet hood 3 along the first direction W is provided with a plurality of circumferentially distributed and spaced-apart corrugated turbulators 32. The corrugated turbulators 32 extend from the outer periphery of the air inlet hood 3 towards the center. The gaps between adjacent corrugated turbulators 32 form vortex-arranged air inlet channels 33. The corrugated turbulators 32 can first divide the inhaled air flow into multiple air flows, thereby achieving the effect of noise reduction. In this embodiment, the inside of the air inlet hood 3 is hollow to form a vortex channel 34. The first end of the vortex channel 34 is connected to the air inlet channels 33 along the circumferential direction perpendicular to the first direction W, and the second end of the vortex channel 34 is connected to the air inlet of the fan motor assembly 5 along the second direction X to further reduce noise. Along the connection direction of the air inlet channels 33, the two ends of the air inlet channels 33 are respectively provided with an air inlet 31 exposed to the outer periphery of the air inlet hood 3 and a narrow slit connecting to the vortex channel 34 to further reduce noise.

[0099] In a preferred embodiment, along the connection direction of the air inlet channels 33, the closer to the vortex channel 34, the smaller the flow area of the air inlet channels 33; the closer to the air inlet 31, the larger the flow area of the air inlet channels 33 to further reduce noise.

[0100] In a preferred embodiment, the fan motor assembly 5 is provided with a rotating impeller 53. The wave convex direction of each corrugated turbulator 32 is the same as the rotation direction of the impeller 53, and the angles at which each air inlet channel 33 enters the vortex channel 34 are different to further reduce noise.

[0101] In a preferred embodiment, a concave arc-shaped notch 35 is provided on one side of each corrugated turbulator 32 facing the air inlet of the fan motor assembly 5 to lengthen the distance between the inhaled air and the impeller, which also has the effect of assisting in noise reduction and further reducing noise.

[0102] Figure 13 Is a perspective view of the fan motor assembly in the fan of the present invention. Figure 14 Is Figure 13 The cross-sectional view taken along the E-E direction in Figure 15 Is an exploded view of the fan motor assembly in the fan of the present invention. Figure 16 Is a perspective view of the air outlet tee seat in the fan motor assembly of the fan of the present invention. As Figures 13 to 16As shown, the fan motor assembly 5 in the fan of the present invention comprises: an air guide cover 51, an air guide cover 52, an impeller 53, a motor bracket 54, a motor 56, a motor cover 58 and an air outlet three-way seat 50 which are sequentially assembled along a first direction W. The air guide cover 51 seals and connects the vortex channel 34 of the air inlet cover 3 and the air guide cover 52.

[0103] Among them, a plurality of first positioning seats 501 and a plurality of first screw lugs 508 are arranged around the outer periphery of the air outlet three-way seat 50. A motor 56 is arranged between the upper surface of the motor bracket 54 and the air outlet three-way seat 50, a plurality of second positioning seats 541 are arranged around the outer periphery of the motor bracket 54, and the motor bracket 54 is provided with a through hole for the rotation shaft of the motor 56 to pass through. A rotating impeller 53 is arranged between the lower surface of the motor bracket 54 and the air guide cover 52, and the impeller 53 is connected to the motor 56 through a rotating shaft transmission, and a plurality of third positioning seats 521 and a plurality of second screw lugs 522 are arranged around the outer periphery of the air guide cover 52. The air outlet three-way seat 50 is screwed with the air guide cover 52, and each second positioning seat 541 of the motor bracket 54 is connected to the first positioning seat 501 and the third positioning seat 521 through a flexible connector, and is clamped and limited between the first positioning seat 501 and the third positioning seat 521, so that the motor bracket 54 in this embodiment is not fixed, but the motor bracket 54 is limited between the air guide cover 52 and the air outlet three-way seat 50 based on the flexible connector on the same horizontal plane. This is equivalent to the motor bracket 54 being suspended between the air guide cover 52 and the air outlet three-way seat 50. The flexible connector and each positioning seat together constitute a shock absorber to ensure that when the fan motor assembly 5 is working, the motor bracket 54 will not contact the air guide cover 52 and the air outlet three-way seat 50 when vibration is generated, and all its contact points are transmitted by the shock absorber, which greatly reduces the noise and can better maintain the stability of the fan.

[0104] In this embodiment, the top surface of the positioning vibration damping pad 55 can be composed of a plane, the purpose of which is to convert the upward vibration into a plane motion when the power system vibrates, so as to balance the vibration. The lower part of the positioning vibration damping pad 55 can be composed of a cone, and the surfaces it contacts are all convex point contacts, the purpose of which is to reduce the contact area to achieve the vibration damping effect. The middle of the positioning vibration damping pad 55 is composed of a hollow blind hole, the purpose of which is to use the middle blind hole to produce elastic deformation by the shock absorber when the power system vibrates, so as to achieve the vibration damping effect, and the hole forms a closed hollow hole with the upper support after assembly, the purpose of which is to lock the air in the blind hole so that it can quickly restore the elastic deformation due to the air pressure during vibration.

[0105] In a preferred embodiment, the first positioning seat 501, the second positioning seat 541, and the third positioning seat 521 are respectively provided with coaxial through holes. The flexible connecting member is a nail-shaped positioning and damping pad 55. The positioning and damping pad 55 passes through and clamps the through holes of the first positioning seat 501, the second positioning seat 541, and the third positioning seat 521. The positioning and damping pad 55 includes a rod portion, an outwardly expanding frustum and an outwardly expanding shoulder platform respectively located at both ends of the rod portion. The maximum diameter of the outwardly expanding frustum and the maximum diameter of the outwardly expanding shoulder platform are both larger than the diameter of the rod portion. The rod portion passes through the through holes of the first positioning seat 501, the second positioning seat 541, and the third positioning seat 521, and clamps the first positioning seat 501, the second positioning seat 541, and the third positioning seat 521 between the outwardly expanding frustum and the outwardly expanding shoulder platform. An axially hollow blind hole is provided along the first direction W of the positioning and damping pad 55, and the hollow blind hole extends at least from the outwardly expanding frustum to the rod portion. Or the hollow blind hole extends at least from the outwardly expanding frustum to the outwardly expanding frustum.

[0106] In a preferred example, between the motor bracket 54 and the air outlet tee seat 50, an annular motor sound-absorbing cotton 57 is provided around the outer periphery of the motor 56. With the above structure, the noise caused by the high-speed rotation of the motor and the impeller is further reduced.

[0107] In this embodiment, the air outlet tee seat 50 includes an air inlet 507 provided on the air outlet side of the impeller, a first air outlet 504 and a second air outlet 505 respectively communicating with the nozzle 7, and a flow splitting wall body 502 that guides the air flow passing through the air inlet 507 to the first air outlet 504 and the second air outlet 505 respectively after splitting. Both ends of the nozzle body 70 are respectively communicated with the first air outlet 504 and the second air outlet 505. The air inlet 507 is located on the first side of the air outlet tee seat 50, the flow splitting wall body 502 is located at the center of the second side of the air outlet tee seat 50, and the first air outlet 504 and the second air outlet 505 are respectively located at both ends of the second side of the air outlet tee seat 50. The first air outlet 504 and the second air outlet 505 are respectively exposed on both sides of the body portion 10. The air outlet directions of the first air outlet 504 and the second air outlet 505 are coaxial and both are perpendicular to the air inlet direction of the air inlet 507. Symmetrical first guiding slopes and second guiding slopes are respectively formed on both sides of the flow splitting wall body 502. The first guiding slope guides part of the air flow passing through the air inlet 507 to the first air outlet 504, and the second guiding slope guides part of the air flow passing through the air inlet 507 to the second air outlet 505. The two ends of the flow splitting wall body 502 protruding in the second direction X extend along the second direction X to the air inlet 507 respectively, jointly forming a U-shaped plate-like flow splitting wall, so as to split the air flow passing through the air inlet 507 on the premise of reducing noise. In this embodiment, the flow splitting wall body 502 is arranged based on the central axis of the air inlet 507, and evenly divides the flow area of the air inlet 507. The inner wall of the air outlet tee seat 50 is provided with guide vanes 506 extending from the air inlet 507 to the second side of the air outlet tee seat 50 respectively, but not limited thereto. The inner wall of the air outlet tee seat 50 is provided with a sunken guide step extending from the first guiding slope to the first air outlet 504. The sunken distance of the sunken guide step is larger when it is closer to the first air outlet 504; the inner wall of the air outlet tee seat 50 is provided with a sunken guide step extending from the second guiding slope to the second air outlet 505. The sunken distance of the sunken guide step is larger when it is closer to the second air outlet 505, so as to reduce the noise when the air flow turns and provide space for the base portion 6, but not limited thereto. The air outlet tee seat 50 in the present invention integrates flow guiding and flow splitting, greatly reducing the height of the fan motor assembly 5, and further reducing the total height and volume of the whole fan.

[0108] In a preferred solution, the inner wall of the air outlet tee seat 50 is provided with guide vanes extending from the air inlet 507 to the first air outlet 504 or the second air outlet 505 respectively, but not limited thereto.

[0109] The air inlet 507 is an annular pipe orifice. The distance from the orifice edge of the annular pipe orifice to the first air outlet 504 or the second air outlet 505 in the first direction W is d. The diameters of the first air outlet 504 and the second air outlet 505 are h. The ratio range of d to h is 2.0 to 3.5. After the air flow generated by the impeller 53 enters the air inlet 507 of the air outlet tee 50, the air flow will rotate the flow direction by at least 90° within a very short distance. If the ratio of d to h is too small, the air pressure of the air flow will be reduced, the air volume will be decreased, and the air supply distance will be affected. On the contrary, if the ratio of d to h is too large, a vortex negative will be formed, and a turbulent flow will be formed, resulting in a lot of noise.

[0110] In a preferred embodiment, the ratio range of d to h is one of the following: 2.1 to 3.4; 2.2 to 3.3; 2.3 to 3.2; 2.4 to 3.1; 2.5 to 3.0; 2.6 to 2.9; 2.7 to 2.8.

[0111] In a preferred embodiment, the ratio of d to h is 2.7.

[0112] Figures 17 to 20 It is a schematic diagram of the installation process of the fan of the present invention. As Figures 17 to 20 shown, the installation process of the fan of the present invention is as follows: First, connect the air inlet hood 3, the air inlet bracket 14, the fan motor assembly 5, and the base part 6 through the first inner shell 4. Insert the nozzle 7 with annular shoulders 74 at both ends horizontally into the semicircular limiting groove 41 exposed by the inner shell 4, so that the first air inlet 72 and the second air inlet 73 of the annular shoulder 74 are respectively connected to the first air outlet 504 and the second air outlet 505 of the air outlet tee 50 of the fan motor assembly 5, and are sealed through the sealing ring 59. Then, snap the second inner shell 4 onto the first inner shell 4 and screw it through the screw holes 42, and snap the annular shoulder 74 into the annular groove formed by the combination of the two semicircular limiting grooves, so that the nozzle 7 can rotate based on the annular groove. Then, buckle two outer shells 8 on the outer periphery of the inner shell 4, install the side support frame 13, and then screw the upper end of the side support frame 13 and the upper end of the outer shell 8 together through the annular connecting frame 12. Finally, place the filter 2 into the space between the inner wall of the outer shell 8 and the outer periphery of the air inlet hood 3, and through the rotational locking of the top cover 11 and the annular connecting frame 12, the filter 2 is sealed and clamped between the top cover 11 and the air inlet bracket 14.

[0113] The installation method of the present invention changes the existing method of sleeving the nozzle 7 vertically on the body part, which is more conducive to the sealing of the air duct and reduces the installation difficulty.

[0114] In summary, the purpose of the present invention is to provide a fan that can change the movement direction of the air flow in the fan, reduce the overall volume, and reduce the use cost.

[0115] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A fan, characterized in that, comprising: a body portion (10), including an air inlet hood (3) having an air inlet, a fan motor assembly (5) for generating an air flow, and an air outlet, the air flow sequentially passing through the air inlet hood (3) and the fan motor assembly (5) in a first direction, the air inlet hood (3) being disposed upstream of the air inlet of the fan motor assembly (5), the outer periphery of the air inlet hood (3) in the first direction being provided with a plurality of circumferentially distributed and spaced-apart corrugated turbulators (32), the interior of the air inlet hood (3) being hollow to form a vortex channel (34), the corrugated turbulators (32) extending from the outer periphery of the air inlet hood (3) towards the center, and the gaps between adjacent corrugated turbulators (32) forming vortex-arranged air inlet channels (33), the air inlet being located at the upper part of the body portion (10) in the direction of gravity, the air outlet being located at the lower part of the body portion (10) in the direction of gravity, and the fan motor assembly (5) being located in the area between the air inlet and the air outlet positions; and a nozzle (7), connected to the air outlet, for receiving the air flow from the body portion (10) and emitting the air flow, exhausting air from the lower part of the body portion (10) into the nozzle (7), and after the air flow flows upward from the nozzle (7), being ejected from the air outlets (71) at different heights of the nozzle (7), the air flow being emitted from the nozzle (7) after moving at least based on a second direction opposite to the first direction, the first direction being the direction of gravity and the second direction being the anti-gravity direction.

2. The fan according to claim 1, characterized in that, a first end of the vortex channel (34) is respectively connected to the air inlet channels (33) in the circumferential direction perpendicular to the first direction, and a second end of the vortex channel (34) is connected to the air inlet of the fan motor assembly (5) in the second direction.

3. The fan according to claim 2, characterized in that, along the connection direction of the air inlet channels (33), air inlets (31) exposed to the outer periphery of the air inlet hood (3) and narrow slits connecting the vortex channel (34) are respectively provided at both ends of the air inlet channels (33).

4. The fan according to claim 3, characterized in that, along the connection direction of the air inlet channels (33), the smaller the flow area of the air inlet channels (33) is, the closer it is to the vortex channel (34); the larger the flow area of the air inlet channels (33) is, the closer it is to the air inlets (31).

5. The fan according to claim 2, characterized in that, a rotating impeller (53) is provided in the fan motor assembly (5), and the corrugated convex direction of each corrugated turbulator (32) is the same as the rotation direction of the impeller (53).

6. The fan according to claim 2, characterized in that, the angles at which each air inlet channel (33) enters the vortex channel (34) are different.

7. The fan according to claim 2, characterized in that, One side of each of the waveform spoiler plates (32) facing the air inlet of the fan motor assembly (5) is provided with a concave arc notch (35).

8. The fan according to claim 2, wherein, the body portion (10) further includes a filter (2), the filter (2) surrounds the air inlet hood (3), and the filter (2) is disposed upstream of the air inlet of the air inlet hood (3).

9. The fan according to claim 8, wherein, the filter (2) is a tubular air filter screen, the fan further includes a top cover (11) pressing against the first side of the tubular air filter screen along the first direction and an air inlet bracket (14) supporting the second side of the tubular air filter screen along the second direction, the annular upper end surface of the tubular air filter screen is sealed with the top cover (11), and the annular lower end surface of the tubular air filter screen is sealed with the air inlet bracket (14).

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