CN211852217U

CN211852217U - Fan with cooling device

Info

Publication number: CN211852217U
Application number: CN202020183858.7U
Authority: CN
Inventors: 应辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2020-11-03
Anticipated expiration: 2030-02-19

Abstract

The utility model provides a fan, included: the body part comprises an air inlet, an air outlet, an air inlet cover and a fan motor component for generating air flow, the air inlet cover is arranged at the downstream of the air inlet and is positioned at the upstream of an air inlet of the fan motor component, the air inlet cover is provided with a silencing hole, and the air flow passes through the body part along a first direction after passing through the silencing hole; and a nozzle connected to the air outlet for receiving the air flow from the body and emitting the air flow into the nozzle with the air flow, the air flow being emitted out of the nozzle after moving in at least a second direction opposite the first direction. The utility model discloses can change the direction of motion of air current in the fan, effective noise reduction has reduced the whole height of fan, has reduced whole volume, has prolonged filter screen life, reduces noise in use and use cost.

Description

Fan with cooling device

Technical Field

The utility model relates to an air conditioning equipment field, specifically speaking relates to the fan.

Background

With the continuous improvement of the living and scientific and technological levels, the requirements of people on living quality are increasingly improved, and the indoor air quality becomes an important concern of people. Particularly, the haze and PM2.5 problems in recent years have increased, and people are increasingly demanding air purifiers.

An air purifier is a small household appliance for purifying indoor air, and mainly solves the problem of indoor air pollution caused by decoration or other reasons. Because of the persistent and uncertain nature of the release of pollutants in indoor air, the use of air purifiers to purify indoor air is an internationally recognized method of improving indoor air quality. There are a number of different technologies and media in air purifiers that enable them to provide clean and safe air to users. Common air purification techniques are: 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 and the like; the material technology mainly comprises the following steps: the cost of high-quality filter screen can account for 20% to 30% of the total cost of the air purifier, such as photocatalyst, active carbon, synthetic fiber, HEPA high-efficiency material, etc.

Currently, more bladeless fans with air screens have emerged. FIG. 1 is a cross-sectional view of a bladeless fan of the prior art. As shown in fig. 1, most of which have an annular nozzle 901, a housing 903, a base 904, a screen 905, a fan motor 906, and a mesh inner container 907. Wherein, shell 903 with air inlet mesh opening sets up on base 904, is equipped with filter screen 905 in the shell 903, is equipped with mesh inner bag 907 in the filter screen 905, is equipped with fan motor 906's first air inlet in the mesh inner bag 907, and annular nozzle 901 all sets up in fan motor 906's gravity direction's top, and fan motor 906's air outlet intercommunication nozzle 901. Indoor air enters the mesh inner container 907 after sequentially passing through meshes of the outer shell 903 and the filter screen 905, an air inlet of the fan motor 906 sucks in the air along the antigravity direction, then the air is conveyed to one end of the annular nozzle 901 along the antigravity direction (vertically upwards), and then the air is sprayed out after being dispersed to all positions of the annular nozzle 901.

There are at least the following technical problems to be improved in this structure:

(1) the annular nozzle and the fan motor with the largest total volume of the bladeless fan are required to be arranged at different height positions in the gravity direction, so that the overall height of the bladeless fan is difficult to reduce, and the use scene of the bladeless fan is greatly limited.

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

(3) Because the air inlet position of the fan motor is lower, dust on the ground can be sucked more easily during air suction, the use load of the filter screen is increased, the filter screen needs to be replaced more frequently, and the use cost of the bladeless fan is obviously increased.

(4) The outer shell of the bladeless fan is a structure that two shells are horizontally folded, and a filter screen is arranged in each shell. The filter screen is sealed between the three-dimensional sealing rubber strip arranged at the downstream and the mesh inner container, the cost of the three-dimensional sealing rubber strip is extremely high, and the sealing effect is poor after the filter screen is used for a long time.

(5) When the filter screen is replaced, the two shells need to be detached respectively, the filter screen is replaced respectively, and then the shells are installed again, so that the process is complicated, and the humanized experience is poor.

(6) The product is difficult to add other functional modules, and the expansibility is poor.

Therefore, the utility model provides a fan.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model aims to provide a fan has overcome prior art, can change the direction of motion of air current in the fan, has reduced the whole height of fan, has reduced whole volume, has prolonged filter screen life, reduces noise in use and use cost.

An embodiment of the utility model provides a fan, include:

the body part comprises an air inlet, an air outlet, an air inlet cover and a fan motor component for generating air flow, the air inlet cover is arranged at the downstream of the air inlet and is positioned at the upstream of an air inlet of the fan motor component, the air inlet cover is provided with a silencing hole, and the air flow passes through the body part along a first direction after passing through the silencing hole; and

a nozzle coupled to the air outlet for receiving the air flow from the body and emitting the air flow, the air flow being emitted out of the nozzle as the air flow enters the nozzle based at least on movement in a second direction opposite the first direction.

Preferably, the silencing holes are arrayed on the surface of the air inlet cover to form a silencing hole array, and the silencing hole array surrounds the air inlet cover.

Preferably, the muffling holes are variable-diameter through holes, the opening diameter of each muffling hole on the outer wall of the air inlet cover is 2.5mm to 4mm, and the opening diameter of each muffling hole on the inner wall of the air inlet cover is 1mm to 2.5 mm.

Preferably, the cross-sectional flow area of the air inlet of the fan motor assembly is S₁The sum of the flow cross-sectional areas of all the muffling holes is S₂，S₂≥S₁。

Preferably, the air inlet hood is an inverted barrel-shaped member and comprises an annular side wall, an opening part and a base plate, the opening part is located at the first end of the annular side wall, the base plate is located at the second end of the annular side wall, the opening part covers the air inlet of the fan motor assembly, and an air inlet space is formed between the air inlet and the base plate.

Preferably, the body further comprises a filter, the filter being a tubular air screen, the filter surrounding the inlet cowl, the filter being disposed upstream of the muffling aperture of the inlet cowl.

Preferably, the fan further comprises a top cover pressing against a first side of the tubular air screen in the first direction, the top cover being rotatably engaged with the body, the base plate supporting the top cover.

Preferably, the top cap crimping one side of tubulose air filter screen is equipped with the locating part, the base plate is equipped with circular spacing groove, and the guide the locating part is in the within range internal rotation of circular spacing groove, along with the rotation of locating part, the top cap with somatic part block or separation.

Preferably, still include along the second direction supports the support admits air of tubulose air strainer second side, the annular up end of tubulose air strainer and the base plate of cover all seals with the top cap, the annular down end of tubulose air strainer and the opening of cover and admit air seal between the support admits air.

Preferably, the flow direction of at least part of the muffling hole is directed to the air inlet of the fan motor assembly, and the air flowing through the muffling hole is limited to converge towards the air inlet of the fan motor assembly.

Preferably, S2 is 2.5S 1.

Preferably, the first direction is a gravity direction, and the second direction is an antigravity direction.

Preferably, the diameter of the opening of the muffling hole on the outer wall of the air inlet hood is 2.8mm to 3.0mm, and the diameter of the opening on the inner wall of the air inlet hood is 2.5mm

The utility model discloses a fan can change the direction of motion of air current in the fan, and effective noise reduction has reduced whole volume, has reduced use cost.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a bladeless fan of the prior art.

Fig. 2 is a schematic view of an internal air duct of the fan of the present invention.

Fig. 3 is a perspective view of the fan of the present invention.

Fig. 4 is a sectional view taken along the line a-a in fig. 3.

Fig. 5 is an exploded view of the fan of the present invention.

Fig. 6 is a schematic view of the combination of the air intake cover and the air intake bracket in the fan of the present invention.

Fig. 7 is a schematic view of the separation of the air intake cover and the air intake bracket in the fan of the present invention.

Fig. 8 is a schematic view of a first modification of the intake cover of the fan according to the present invention.

Fig. 9 is a schematic view of a second modification of the intake cover of the fan according to the present invention.

Fig. 10 is a sectional view of the fan motor assembly of the present invention.

Fig. 11 is a sectional view taken along line B-B in fig. 8.

Fig. 12 is a partially exploded view of a fan motor assembly in a fan according to the present invention.

Fig. 13 is a perspective view of a motor cover in the fan of the present invention.

Fig. 14 is a schematic view illustrating a principle of guiding a flow of the fan motor assembly to the nozzle in the fan according to the present invention.

Fig. 15 is a perspective view of a nozzle in a fan according to the present invention.

Fig. 16 is an exploded view of a nozzle of the fan according to the present invention.

Fig. 17 is a partial sectional view of a first nozzle in the fan of the present invention.

Fig. 18 is a partial sectional view of a second nozzle in the fan of the present invention.

Fig. 19 is a schematic diagram of a fan according to the present invention, in which a second nozzle increases the spray angle.

Fig. 20 is a schematic diagram of a fan according to the present invention in which a second nozzle is at a maximum spray angle.

Reference numerals

10 body 504 first outlet

11 second air outlet of the top cover 505

12 annular connecting frame 51 wind-guiding gauze mask

13 side support frame 52 wind scooper

14 air intake support 53 impeller

141 central opening 54 motor support

142 first buckle 55 positioning damping pad

143 second catch 56 motor

2 Filter 58 Motor cover

3 air inlet cover 581 first guide vane

30 annular side wall 582 second guide vane

31 silencing hole 583 air outlet

311 silencing hole 6 base

312 muffling hole 7 nozzle

32 circular limiting groove 70 nozzle body

33 bayonet 71 air outlet

34 substrate 72 output gas duct

35 opening 73 just wind barricade

4 first air inlet of inner shell 74

5 second air intake of Fan Motor Assembly 75

50 air-out tee joint seat 76 rotating member

502 shunting wall 77 inner contracting shoulder

503 formula water conservancy diversion step 8 shells that sinks

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

Fig. 2 is a schematic view of an internal air duct of the fan of the present invention. As shown in fig. 2, the fan of the present invention includes a body 10 for generating an air flow and a nozzle 7 for spraying the air flow. The body 10 comprises, among other things, at least a top cover 11, a filter 2, an inlet hood 3 providing an air inlet, a fan-motor assembly 5 for generating an air flow, a housing 8 providing an air outlet. Both sides of the shell 8 are provided with air inlet holes, and the filter 2 is arranged at the corresponding position of the inner side of the air inlet hole in the shell 8. The filter 2 is arranged upstream of the inlet hood 3, the filter 2 surrounding the inlet hood 3. The air inlet cover 3 is arranged at an air inlet of the fan motor component 5. The fan motor assembly 5 causes an air flow through the body 10 in a first direction W, which is the direction of gravity. The nozzle 7 is connected to the air outlet for receiving the air flow from the body 10 and emitting the air flow, which is emitted out of the nozzle 7 after moving at least in a second direction X opposite to the first direction W with the air flow entering the nozzle 7, the second direction X being the anti-gravity direction. The air inlet is provided to the inlet cowl 3, and the inlet cowl 3 is located at an upper portion of the body 10 in the direction of gravity. The air outlet is located at the lower part of the housing 8 of the body 10 in the direction of gravity, and the fan-motor assembly 5 is located in the area between the air inlet and the air outlet. The nozzle 7 has at least one outlet duct 72, the outlet duct 72 extending in a direction parallel to the first direction W, the air flow passing through the outlet duct 72 in the second direction X. The utility model discloses a fan is through the wind channel design different completely with prior art, inverts fan motor subassembly 5's the direction of breathing in, highly breathes in from the upper portion of somatic part 10, and air current top-down is behind fan motor subassembly 5, and the lower part of following somatic part 10 is discharged and is entered into nozzle 7, and the air current flows back from bottom to top by nozzle 7 again, can follow the not air outlet 71 of co-altitude of nozzle 7 and spray away. The utility model discloses overlap fan motor subassembly 5's position overall arrangement and nozzle 7's position overall arrangement on the first direction, further reduced whole height to make full use of nozzle 7 central idle space. And, under the prerequisite of equal height, the utility model discloses can realize bigger nozzle 7, strengthen the air supply ability.

In one modification, the nozzle 7 may be a tubular member extending in a vertical direction and provided on one side of the body 10, and a lower section of the tubular member may be rotatably connected to the opening of the body 10, but not limited thereto.

The utility model provides a nozzle 7 and fan motor subassembly 5 can follow first direction W (or second direction X) parallel arrangement to, nozzle 7 and fan motor subassembly 5 overlap at least partly based on the projection of same plumb plane separately. This allows the outlet 71 of the nozzle 7 to be disposed at the same level as the fan motor assembly 5, even at a level lower than the level of the fan motor assembly 5. The utility model discloses an improvement to the wind channel, the long distance air current stroke that successively passes through fan motor subassembly and nozzle along single direction with prior art air current has divided into two sections at least opposite direction's short distance air current strokes, two sections short distance air current strokes can be parallel to each other to broken through the industry technology barrier that fan motor subassembly and nozzle must arrange in proper order on the direction of height, make the whole height of fan reduce widely, also reduced the focus of product, improved the stability of the product gesture of standing. And the air inlet that is located the top position can not inhale the dust on ground when breathing in, has reduced the use load of filter screen, need not to change the filter screen frequently, has reduced the use cost of bladeless fan filter screen greatly.

The air outlet of the fan motor assembly 5 is connected to two air guiding ducts, the air guiding ducts are respectively communicated to the openings on the two sides of the body 10, the nozzle 7 has a semi-frame-shaped nozzle body 70, the nozzle body 70 is bridged on the first side surface of the body 10 facing the first direction W, and the two ends of the nozzle body 70 are respectively communicated with the openings. The body 10 has at least one air duct for changing the direction of the air flow, which extends in a third direction Y perpendicular to the first direction W and communicates with the outlet of the fan-motor assembly 5 and the nozzle 7, respectively. 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 not limited thereto. The nozzle body 70 in this embodiment has an inverted U shape, and the nozzle body 70 may rotate at a certain angle with respect to the body 10 based on the axis of the opening of the body 10 as a rotation axis, so as to blow air in different directions. After the rotation, although the air flow flowing along the nozzle body 70 flows obliquely (based on the vertical plane), the air flow is displaced in the second direction X (antigravity direction) as the air flow enters the deep portion of the nozzle body 70. The nozzle body 70 is provided with at least one air outlet 71 opening along a fourth direction Z perpendicular to a plane formed by the first direction W and the third direction Y. The air outlet holes 71 of the nozzle body 70 are combined to form an inverted U-shaped air duct, and the air inlet of the body 10 is located within the range of the inverted U-shaped air duct.

In a preferred embodiment, the nozzle body 70 has a first state in which it straddles a first side surface of the body 10 facing the first direction, and a second state in which the nozzle body 70 avoids a projected area of the filter 2 in the second direction based on the opening rotation, and the filter 2 has a lift stroke in which it avoids the nozzle body 70 in the second direction to get in and out of the body 10 based on the second state of the nozzle body 70. The projection of the lifting stroke of the filter 2 based on the second direction does not overlap the projection of the second state of the nozzle body 70 based on the second direction, so that the body 10 can be removed after detaching the filter 2 in the second direction X, but not limited thereto.

In a preferred embodiment, the receiving space has two replacement channels for the filter 2 to enter and exit the receiving space (the U-shaped nozzle body 70 naturally has two oversized openings communicating with the inner receiving space), the extension direction of the replacement channels is perpendicular to the second direction, the filter 2 has a first stroke from the body 10 into and out of the receiving space in the second direction, and a second stroke from the replacement channels into and out of the receiving space. The height of the accommodating space and the height J of the replacing channel are both larger than the height K of the filter 2, and the width of the accommodating space and the width of the replacing channel are both larger than the width of the filter 2.

Fig. 3 is a perspective view of the fan of the present invention. Fig. 4 is a sectional view taken along the line a-a in fig. 3. Fig. 5 is an exploded view of the fan of the present invention. As shown in fig. 3 to 5, in a preferred embodiment of the present invention, the body of the fan of the present invention includes a base 6, a fan motor assembly 5 for generating an air flow, an air inlet bracket 14, an air inlet cover 3 providing an air inlet, a filter 2, and a top cover 11 arranged from bottom to top along the second direction X. The utility model discloses an idle nozzle 7's central region among the make full use of prior art is regional, sets up somatic part 10 wholly in nozzle 7's central region, and somatic part 10's air inlet is located the within range in the type of falling U wind channel for the volume of product reduces greatly, has reduced the cost of product transportation and product storage.

Two inner shells 4 that can involutory each other block fan motor subassembly 5 and the both sides of base 6, inner shell 4 involutory spiro union back with fan motor subassembly 5 spacing in base 6 top, two inner shells 4 involutory back formation an annular groove. The inner sides of both ends of the nozzle body 70 are respectively provided with a first air inlet 74 and a second air inlet 75, and the first air inlet 74 and the second air inlet 75 are respectively communicated with one opening of both sides of the body 10.

Two outer shells 8 that can involutory each other block in the periphery of inner shell 4, and air inlet cover 3 and fan motor subassembly 5 are covered to outer shell 8, and the region that corresponds air inlet cover 3 of every outer shell 8 is equipped with the inlet port of mesh form.

The filter 2 surrounds the inlet hood 3, the filter 2 being arranged upstream of the air inlet of the inlet hood 3. The filter 2 is a tubular air filter screen 23, a first annular support frame 22 for fixing the first annular sealing element 21 is arranged on the first side of the tubular air filter screen 23, a slot is arranged on the lower surface of the top cover 11, and the slot of the top cover 11 is detachably clamped with the first annular support frame 22. The medium of the tubular air filter 23 may be an existing air filter material or an air filter material of a future utility model, but is not limited thereto.

Fig. 6 is a schematic view of the combination of the air intake cover and the air intake bracket in the fan of the present invention. Fig. 7 is a schematic view of the separation of the air intake cover and the air intake bracket in the fan of the present invention. As shown in fig. 6 and 7, the inlet cowl 3 in the present embodiment is disposed downstream of the air inlet and upstream of the air inlet of the fan motor assembly 5, and the inlet cowl 3 is provided with a muffling hole 31 through which the air passes in the first direction through the body 10 after passing through the muffling hole 31. The muffling holes 31 are arrayed on the surface of the air inlet cover 3 to form an array of muffling holes 31, and the array of muffling holes 31 surrounds the air inlet cover 3. The muffling holes 31 are reducing through holes, the opening area of each muffling hole 31 on the outer wall is larger than that of the inner wall, the opening diameter of each muffling hole 31 on the outer wall of the air inlet cover 3 is 2.5mm to 4mm, and the opening diameter on the inner wall of the air inlet cover 3 is 1mm to 2.5 mm. In a preferred scheme, the opening diameter of the muffling hole 31 positioned on the outer wall of the air inlet cover 3 is 2.8mm to 3.0mm, and the opening diameter of the inner wall of the air inlet cover 3 is 2.5mm, so that each muffling hole 31 has a better muffling and noise reducing function, and a better silencing effect of the whole machine is obtained.

In order to obtain the optimum effect between the intake air quantity and the sound volume, the flow cross-sectional area of the air inlet of the fan motor assembly 5 is S₁The sum of the flow cross-sectional areas of all the muffling holes 31 is S₂，S₂≥S₁. In a preferred embodiment, the sum of the flow cross-sectional areas of all the muffling holes 31 is S₂A flow cross-sectional area S of the gas inlet of 2.5 times or more₁Thereby further ensuring better mute effect.

Furthermore, the top cover 11 is rotatably engaged with the body 10, the base plate 34 supports the top cover 11, a limiting member is disposed on one side of the top cover 11 pressed against the tubular air filter, the base plate 34 is provided with a circular limiting groove 32, the limiting member is guided to rotate within the circular limiting groove 32, and the top cover 11 is engaged with or disengaged from the body 10 along with the rotation of the limiting member. The air inlet bracket 14 supports the second side of the tubular air screen in the second direction, the annular upper end surface of the tubular air screen 23 and the base plate 34 of the air inlet hood 3 are sealed with the top cover 11, and the annular lower end surface of the tubular air screen 23 and the opening 35 of the air inlet hood 3 are sealed with the air inlet bracket 14. Air inlet hood 3 provides support and rotatory guide effect to top cap 11, has strengthened the bulk strength of product and the special functional of changing the filter screen, the utility model discloses a fan opens top cap 11 back through the rotation and replaces new tubulose air filter 23.

The intake bracket 14 is provided with a plurality of first catches 142 surrounding the central opening 141 and a plurality of second catches 143 arranged outside the first catches 142. The bayonet of the opening part 35 of the air inlet cover 3 is buckled with the first buckle 142 of the air inlet support 14, the lower surfaces of the two side support frames 13 are connected with the second buckle 143 of the air inlet support 14, the height of the shell 8 is larger than that of the fan motor assembly 5, and a space for accommodating the filter 2 and the air inlet cover 3 is provided between the two side support frames 13 on the upper part of the enclosed shell 8. The lower surface of air inlet support 14 is equipped with the spliced pole, and the upper surface in air inlet support 14 is connected to the cover 3 that admits air for the cover 3 that admits air can be connected in the air intake department of fan motor subassembly 5 through air inlet support 14.

In order to strengthen the air current velocity and silence effect, the utility model discloses an air inlet hood 3 that can adopt following structure:

fig. 8 is a schematic view of a first modification of the intake cover of the fan according to the present invention. As shown in fig. 8, the intake hood 3 is an inverted barrel-shaped member, and includes an annular sidewall 30, an opening portion 35 located at a lower end of the annular sidewall 30, and a base plate 34 located at an upper end of the annular sidewall 30, wherein the opening portion 35 is in sealed communication with the central opening 141 of the intake frame 14, and the opening portion 35 covers the intake port of the fan motor assembly 5, and an intake space is formed between the intake port and the base plate 34. Each muffling hole 311 on the air intake hood 3 is a reducing through hole arranged in the direction of outward radiation along the rotating shaft of the motor, and the opening on the outer wall of the air intake hood 3 is larger than the opening on the inner wall of the air intake hood 3, so as to obtain better muffling effect.

Fig. 9 is a schematic view of a second modification of the intake cover of the fan according to the present invention. As shown in fig. 9, the air inlet hood 3 is a frustum, and includes a frustum-shaped annular side wall 30, an opening 35 located at a lower end of the annular side wall 30, and a base plate 34 located at an upper end of the annular side wall 30, wherein the opening 35 covers an air inlet of the fan motor assembly 5, and an air inlet space is formed between the air inlet and the base plate 34. Each silencing hole 312 on the air inlet cover 3 is a reducing through hole, the opening on the outer wall of the air inlet cover 3 is larger than the opening on the inner wall of the air inlet cover 3, the flow guide direction of each silencing hole 312 points to the air inlet of the fan motor component 5, and the air flowing through the silencing hole 31 is limited to converge towards the air inlet of the fan motor component 5, so that better balance between the airflow speed and the silencing effect is obtained, and the comprehensive performance and the humanized experience of the whole machine are improved.

Fig. 10 is a sectional view of the fan motor assembly of the present invention. Fig. 11 is a sectional view taken along line B-B in fig. 8. Fig. 12 is a partially exploded view of a fan motor assembly in a fan according to the present invention. Fig. 13 is a perspective view of a motor cover in the fan of the present invention. Fig. 14 is a schematic view illustrating a principle of guiding a flow of the fan motor assembly to the nozzle in the fan according to the present invention. As shown in fig. 10 to 14, the fan motor assembly 5 of the fan of the present invention includes: the air guide cover 51, the air guide cover 52, the impeller 53, the motor bracket 54, the motor 56, the motor cover 58 and the air outlet tee 50 which are sequentially combined along the first direction W are mainly combined through a positioning damping pad 55. The air guide cover 51 sealingly communicates the scroll passage 34 of the intake cover 3 with the air guide cover 52. The motor bracket 54 and the motor cover 58 together form a housing for accommodating the motor 56, the housing is provided with a first guide vane 581 and a second guide vane 582 for guiding air to the two air outlets, respectively, a part of the air generated by the impeller is guided by the first guide vane 581 and then is delivered to the first outlet 504 along the first path 5a, and the other part of the air generated by the impeller is guided by the second guide vane 582 and then is delivered to the second outlet 505 along the second path 5 b.

Each guide vane inclines towards the nearby air outlet, and the included angle between the inclined surface of each guide vane and the vertical plane is 10-45 degrees. In a preferred embodiment, the motor housing 58 has guide vanes inclined in half mirror images about the circumference thereof, and the guide vanes are respectively arranged in four quadrants in half mirror images. The included angle between the inclined plane and the vertical plane of the guide vane is 20 degrees, so that the wind of the impeller can be guided to the air outlets on the two sides, the wind is uniformly discharged, and the noise is reduced.

In this embodiment, the first path 5a and the second path 5b are separated by different guide vane mating housings, and at least a part of the first path 5a is defined by the motor bracket 54, the outer surface of the housing of the motor cover 58, and the first guide vane 581 of the motor cover 58. At least part of the second path 5b is defined by the motor bracket 54, the outer surface of the outer shell of the motor housing 58 and the second guide vanes 582 of the motor housing 58.

The fan motor assembly 5 further includes an air outlet tee 50 located at the downstream of the housing, the air outlet tee 50 includes an air inlet for receiving air flow, a first air outlet 504 and a second air outlet 505 respectively communicated with the nozzle 7, and a diversion wall 502 for guiding the air flow to the first air outlet 504 and the second air outlet 505 respectively after being diverted, and two ends of the nozzle 7 are respectively communicated with the first air outlet 504 and the second air outlet 505. The air passing through the first guide vane 581 along the first path 5a is guided to the first outlet port 504 through one side of the diverging wall 502, and the air passing through the second guide vane 582 along the second path 5b is guided to the second outlet port 505 through the other side of the diverging wall 502. The fan motor assembly 5 further includes an air inlet, the flow dividing wall 502 is disposed on the basis of a central axis of the air inlet, and equally divides a flow area of the air inlet, two sides of the flow dividing wall 502 respectively form a first guiding slope and a second guiding slope, the first guiding slope guides a part of the air flow passing through the air inlet to the first air outlet 504, and the second guiding slope guides a part of the air flow passing through the air inlet to the second air outlet 505, so that the air flow passing through the air inlet can be divided on the premise of reducing noise. The inner wall of the air outlet tee 50 is provided with a sinking type flow guide step extending from the first guide slope to the first air outlet 504, and the sinking distance of the sinking type flow guide step is larger as the sinking type flow guide step is closer to the first air outlet 504; the inner wall of the air outlet tee 50 is provided with a sinking type flow guiding step extending from the second guiding slope to the second air outlet 505, the sinking distance of the sinking type flow guiding step is larger as the second guiding slope is closer to the second air outlet 505 so as to reduce the noise caused by the turning of the air flow, and a space is provided for the base 6, but not limited thereto.

The heat generated by the motor is discharged along the direction S, and is shunted by the shunting wall 502 of the outlet tee 50 and then reaches the first outlet 504 and the second outlet 505 along the sunken diversion step. The air flow generated by the impeller 53 passes through the motor bracket 54, the outer surface of the outer shell of the motor housing 58, the first guide vane 581 and the second guide vane 582 of the motor housing 58 in the R direction (the direction of the dashed arrow in fig. 13 and 14) and then reaches the first air outlet 504 and the second air outlet 505, respectively, and the second part of the air flow does not need to be aligned with the diversion wall 502 for turning. In this embodiment, the direction S is similar to the direction R, such that movement of the airflow in the direction R helps to more efficiently carry away heat generated by the motor 56 between the motor bracket 54 and the motor cover 58, which helps to cool the motor. The utility model discloses a turn to respectively behind the air current reposition of redundant personnel, effectively reduced the noise to can accelerate the speed that the air current flows to nozzle 7 through air-out tee bend 50. The utility model provides an air-out tee bend seat 50 with water conservancy diversion and reposition of redundant personnel and integration, greatly reduced fan motor subassembly 5's height for the total height and the volume of fan complete machine also further reduce.

Fig. 15 is a perspective view of a nozzle in a fan according to the present invention. Fig. 16 is an exploded view of a nozzle of the fan according to the present invention. Fig. 17 is a partial sectional view of a first nozzle in the fan of the present invention. As shown in fig. 15 to 20, the nozzle 7 of the present invention includes an output air duct 72, a first air inlet 74, a second air inlet 75, an air outlet 71 and at least one positive air retaining wall 73, the shape of the nozzle 7 is an inverted U shape, and the two air inlets of the nozzle 7 are respectively connected to two sides of the body 10. The air inlet receives the air flow from the body 10, and transmits the air flow to the air outlet 71 through the air outlet duct 72 to emit the air flow, and the positive air retaining wall 73 blocks part of the air flow flowing to the air outlet 71 to adjust the air outlet angle of the air flow ejected out of the air outlet 71. As the air flow enters the nozzle 7, the air flow is emitted out of the nozzle 7 after moving in at least a second direction opposite to the first direction. The positive air retaining wall 73 is arranged on the inner wall of the output air duct 72 and is on the same side with the air outlet 71, the positive air retaining wall 73 is located at the upstream of the air outlet 71, the plane where the positive air retaining wall 73 is located is perpendicular to the guiding direction of the output air duct 72, the positive air retaining wall 73 can guide the air outlet angle, and the included angle a between the air outlet direction of the air flow ejected out of the air outlet 71 and the axis of the air outlet 71 is reduced to 15 degrees. (if the positive air retaining wall 73 is not provided, the included angle between the air outlet direction of the air flow ejected out of the air outlet 71 and the axis of the air outlet 71 may exceed 45 °, and at this time, the fan can only be used as a low-position vertical fan, and cannot be used as a desk fan).

In a preferred embodiment, a plurality of windward dams 73 are sequentially provided in the outlet air passage 72 along the direction of guidance of the outlet air passage 72. The height of the positive wind retaining wall 73 increases in turn in the direction of guidance of the outlet air duct 72.

In a preferred embodiment, the air outlet 71 is provided with an inner contracting shoulder 77, the contracting depth of the inner contracting shoulder 77 is less than the height of the positive air retaining wall 73, the contracting depth of the inner contracting shoulder 77 is 5mm to 12mm, and the height of the positive air retaining wall 73 is 15mm to 25 mm. In this embodiment, the retraction depth of the retraction shoulder 77 is 7mm, and the height of the positive air retaining wall 73 is 18.5mm, so as to further reduce the included angle a between the air outlet direction of the air flow ejected out of the air outlet 71 and the axis of the air outlet 71.

Fig. 18 is a partial sectional view of a second nozzle in the fan of the present invention. Fig. 19 is a schematic diagram of a fan according to the present invention, in which a second nozzle increases the spray angle. Fig. 20 is a schematic diagram of a fan according to the present invention in which a second nozzle is at a maximum spray angle. As shown in fig. 18 to 20, the nozzle 7 of the present invention further includes a rotating member 76 for adjusting an angle between the positive air retaining wall 73 and the guiding direction of the outlet air passage 72. The rotating piece 76 is arranged on the inner wall of the output air duct 72 and on the same side as the air outlet 71, and the rotating piece 76 is connected with the positive air retaining wall 73. As the positive air retaining wall 73 blocks more air flow, the angle a between the air outlet direction of the air flow ejected out of the air outlet 71 and the axis of the air outlet 71 is reduced (for example, reduced to 15 °). Compared with fig. 19 to 20, as the positive wind retaining wall 73 blocks less air flow, the angle a between the wind direction of the air flow ejected out of the wind outlet 71 and the axis of the wind outlet 71 increases (for example, increases to 45 °). The utility model discloses a rotating member 76 is at the positive wind wall 73 of output air flue 72 rotation, adjusts positive wind barricade 73 to the air current of the output air flue 72 that is close to air outlet 71 side to the realization makes air-out angular adjustment to be fit for the comfortable angle of human body, makes the utility model discloses a fan can be applied to the desk fan simultaneously and found two kinds of different use scenes of fan.

To sum up, the utility model aims to provide a fan can change the direction of motion of air current in the fan, and effective noise reduction has reduced whole volume, has reduced use cost.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A fan, comprising:

a body (10) comprising an air inlet, an air outlet, an air intake shroud (3) and a fan motor assembly (5) for generating an air flow, the air intake shroud (3) being disposed downstream of the air inlet and upstream of an air inlet of the fan motor assembly (5), the air intake shroud (3) being provided with a muffling aperture (31), the air flow passing through the body (10) in a first direction after passing through the muffling aperture (31); and

a nozzle (7) connected to the air outlet for receiving an air flow from the body (10) and emitting the air flow, the air flow entering the nozzle (7) with the air flow, the air flow being emitted out of the nozzle (7) at least upon movement in a second direction opposite to the first direction.

2. The fan according to claim 1, characterized in that the muffling holes (31) are arranged in an array on the surface of the air intake housing (3) to form an array of muffling holes (31), the array of muffling holes (31) surrounding the air intake housing (3).

3. The fan according to claim 2, wherein the muffling holes (31) are reducing through holes, and each of the muffling holes (31) has an opening diameter of 2.5mm to 4mm at an outer wall of the air intake housing (3) and an opening diameter of 1mm to 2.5mm at an inner wall of the air intake housing (3).

4. The fan according to claim 2, characterized in that the flow cross-section of the air inlet of the fan-motor assembly (5) is S₁The sum of the flow cross-sectional areas of all the muffling holes (31) is S₂，S₂≥S₁。

5. The fan as claimed in any one of claims 1 to 3, wherein the inlet hood (3) is an inverted bucket comprising an annular side wall (30), an opening (35) at a first end of the annular side wall (30), and a base plate (34) at a second end of the annular side wall (30), the opening (35) covering an inlet of the fan motor assembly (5), the inlet and the base plate (34) forming an air inlet space therebetween.

6. The fan according to claim 5, characterized in that said body (10) further comprises a filter (2), said filter (2) being a tubular air screen, said filter (2) surrounding said inlet hood (3), said filter (2) being arranged upstream of the muffling opening (31) of said inlet hood (3).

7. The fan of claim 6, further comprising a top cover (11) crimped to a first side of the tubular air screen in the first direction, the top cover (11) rotationally engaged with the body (10), the base plate (34) supporting the top cover (11).

8. The fan as claimed in claim 7, wherein a limiting member is disposed on one side of the top cover (11) pressed against the tubular air filter, the base plate (34) is provided with a circular limiting groove (32), the limiting member is guided to rotate within the range of the circular limiting groove (32), and the top cover (11) is engaged with or disengaged from the body (10) along with the rotation of the limiting member.

9. The fan according to claim 8, further comprising an air intake bracket (14) supporting the second side of the tubular air screen in the second direction, the annular upper end face of the tubular air screen and the base plate (34) of the air intake housing (3) each being sealed to the top cover (11), the annular lower end face of the tubular air screen and the open portion (35) of the air intake housing (3) being sealed to the air intake bracket (14).

10. The fan according to claim 1, wherein the direction of flow of at least some of the muffling holes (31) is directed towards the air inlet of the fan-motor assembly (5), defining a convergence of the air flow through the muffling holes (31) towards the air inlet of the fan-motor assembly (5).