CN110762062A

CN110762062A - Fan and method for replacing filter of fan

Info

Publication number: CN110762062A
Application number: CN201911129214.8A
Authority: CN
Inventors: 应辉
Original assignee: Individual
Current assignee: Zhejiang Crossbow Brand Electric Appliance Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-02-07
Anticipated expiration: 2039-11-18
Also published as: CN110762062B

Abstract

The invention provides a fan and a method for replacing a filter of the fan, comprising the following steps: a body comprising an air inlet, an air outlet, a removable filter and a fan-motor assembly for generating an air flow through the body in a first direction; 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 to the first direction; the air outlet of the fan motor component is connected with two guide air passages which are respectively communicated with the openings on the two sides of the body part, the nozzle is provided with a semi-frame-shaped nozzle body, the two ends of the nozzle body are respectively and rotatably communicated with the openings, the nozzle body is provided with a first state which is bridged on the first side surface of the body part facing to the first direction, the nozzle body is avoided to be in a second state based on a projection area of the second direction, and the filter is provided with a lifting stroke which is based on the second state and is used for avoiding the nozzle body along the second direction so as to get in.

Description

Fan and method for replacing filter of fan

Technical Field

The invention relates to the field of refrigeration equipment, in particular to a fan and a method for replacing a filter by 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.

Accordingly, the present invention provides a fan.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a fan and a method for replacing a filter of the fan, which overcome the defects in the prior art, can change the movement direction of air flow in the fan, reduce the integral height of the fan, reduce the integral volume, prolong the service life of a filter screen and reduce the use cost.

An embodiment of the present invention provides a fan including

A body comprising an air inlet, an air outlet, a removable filter and a fan-motor assembly for generating an air flow through the body in a first direction; and

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

the air outlet of the fan motor assembly is connected with two guide air passages, the guide air passages are respectively communicated with openings on two sides of the body, the nozzle is provided with a semi-frame-shaped nozzle body, two ends of the nozzle body are respectively and rotatably communicated with the openings, the nozzle body is provided with a first state of being bridged on a first side surface of the body facing to the first direction, and a second state of avoiding the nozzle body based on a projection area of a second direction after the nozzle body rotates based on the openings, and the filter is provided with a lifting stroke of avoiding the nozzle body along the second direction based on the second state of the nozzle body so as to enter and exit the body.

Preferably, a projection of the elevating stroke of the filter based on the second direction does not overlap with a projection of the second state of the nozzle body based on the second direction.

Preferably, the nozzle body is in an inverted U shape, the inner sides of the two ends of the nozzle body are respectively provided with a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively communicated with one opening.

Preferably, the first air inlet and the second air inlet are respectively provided with an annular shoulder, the outer edges of the openings at two sides of the body part are provided with annular grooves, and the annular shoulders are clamped in the annular grooves and rotate based on the annular grooves.

Preferably, the angular range over which the annular shoulder rotates based on the annular groove is between ± 60 degrees based on the second direction.

Preferably, the filter is a tubular air screen, the axis direction of tubular air screen is followed the setting of first direction, the fan still includes along first direction crimping the top cap of the first side of tubular air screen and along the second direction supports the air inlet bracket of tubular air screen second side.

Preferably, the first direction is a gravity direction, the second direction is an antigravity direction, the air inlet is located at an upper portion of the body portion in the gravity direction, the air outlet is located at a lower portion of the body portion in the gravity direction, and the fan motor assembly is located at a region between the air inlet and the air outlet.

Preferably, the nozzle has at least one output air passage, the extension direction of the output air passage is parallel to the first direction, the air flow passes through the output air passage along the second direction, the body has at least one guide air passage for changing the flow direction of the air flow, the guide air passage extends along a third direction perpendicular to the first direction and is respectively communicated with the air outlet of the fan motor assembly and the nozzle.

The embodiment of the invention also provides a method for replacing the filter of the fan, which adopts the fan and comprises the following steps:

rotating the nozzle body to a second state;

separating the filter to be replaced in the body;

pulling the filter out of the body in a second direction, the filter being removed from the fan out of the nozzle body;

pressing an unused filter into the body in a second direction away from the nozzle body;

combining the unused filter in the body;

the nozzle body is rotated to a first state.

Preferably, the filter is a tubular air screen, and the fan further comprises a top cover for crimping a first side of the tubular air screen in the first direction and an air inlet bracket for supporting a second side of the tubular air screen in the second direction;

the separation of the filter to be replaced comprises: separating the top cover from the body, exposing the filter to be replaced, and pulling the filter out of the body from the air inlet bracket along a second direction;

combining unused filters includes: self-pressing the filter in a first direction to the air intake cradle of the body, combining the top cover with the body, closing the unused filter.

The fan and the method for replacing the filter of the fan can change the movement direction of air flow in the fan, reduce the whole volume and reduce the use cost.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon 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 sectional view taken along the line a-a in fig. 2.

Fig. 4 is a schematic diagram of a fan connection functional module according to the present invention.

Fig. 5 is a perspective view of the fan of the present invention.

Fig. 6 is a sectional view taken along line B-B in fig. 5.

Fig. 7 is a sectional view taken along line C-C in fig. 5.

Fig. 8 is an exploded view of the fan of the present invention.

FIG. 9 is a partially exploded view of one embodiment of the fan of the present invention.

Fig. 10 is a perspective view of an air inlet in the fan of the present invention.

FIG. 11 is a schematic view of an air inlet of the fan of the present invention.

Fig. 12 is a sectional view taken along line D-D in fig. 11.

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

Fig. 14 is a sectional view taken along line E-E in fig. 13.

Fig. 15 is an exploded view of a fan motor assembly in the fan of the present invention.

Fig. 16 is a perspective view of an air outlet three-way seat in a fan motor assembly of the fan of the present invention.

Fig. 17 to 20 are schematic views illustrating an installation process of the fan of the present invention.

Fig. 21 to 23 are schematic views illustrating a first filter flow state of the fan according to the present invention. And FIGS. 24 to 27 are schematic views illustrating a second filter flow state of the fan according to the present invention.

Reference numerals

10-body 51 wind-guiding mask

11 top cover 52 wind scooper

Third positioning seat of 111 positioning fastener 521

112 first terminal 522 second threaded lug

Connecting groove of 12-ring-shaped connecting frame 523

121 positioning clamping groove 53 impeller

122 screw hole 54 motor support

Second positioning seat of 13-side supporting frame 541

14 air inlet support 55 positioning damping pad

141 connecting column 56 motor

2 Filter 57 Motor silencing Cotton

21 first annular seal 58 Motor housing

22 first ring support 59 sealing ring

23 tubular air filter screen 6 base

24 second ring-shaped support frame 61 power box upper cover

25 second ring seal 62 Power strip

3 air inlet cover 63 rotating synchronous motor

31 air inlet 64 rotary bracket

32 wave-shaped spoiler 65 base

33 air inlet channel 66 base cover

34 swirl channel 7 nozzle

35 concave arc notch 70 nozzle body

4 inner shell 71 air outlet

41 semicircular limiting groove 72 first air inlet

42 screw hole 73 second air inlet

43 first catch 74 annular shoulder

5 Fan Motor Assembly 75 accommodation space

50 air-out tee base 8 shell

501 first side of first positioning seat 8A

502 diversion wall 8B second side

503 sinking type air inlet with diversion step 81

504 first air outlet 82 semicircle joggle part

505 second outlet 83 screw hole

506 second catch of deflector 84

507 air inlet 9 function expansion piece

508 first screw lug 91 second contact terminal

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. Fig. 3 is a sectional view taken along the line a-a in fig. 2. As shown in fig. 2 and 3, 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, and a nozzle 7. The first side 8A (see fig. 17) of the housing 8 is provided with an air intake hole 81, and the filter 2 is disposed in the housing 8 at a corresponding position inside the air intake hole 81. 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 second side 8B (see fig. 17) of the casing 8 of the body 10 in the direction of gravity, and the fan-motor assembly 5 is located in the region between the air inlet and the air outlet. The nozzle 7 has at least one outlet duct, the extension of which is parallel to the first direction W, through which the air flow passes in the second direction X. The fan of the invention adopts an air duct design completely different from the prior art, the air suction direction of the fan motor component 5 is reversed, high air suction is carried out from the upper part of the body part 10, air flow passes through the fan motor component 5 from top to bottom, then is exhausted from the lower part of the body part 10 and enters the nozzle 7, and the air flow flows from bottom to top through the nozzle 7 and can be sprayed out from air outlets 71 with different heights of the nozzle 7. The invention overlaps the position layout of the fan motor component 5 and the position layout of the nozzle 7 in the first direction, further reduces the whole height, and fully utilizes the idle space in the center of the nozzle 7. Moreover, on the premise of equal height, the invention can realize a larger nozzle 7 and enhance the air supply capability.

In one variant, the nozzle 7 may be a vertically extending tubular member provided on one side of the body 10, the lower section of the tubular member being rotatably connected to the opening of the body 10.

The nozzle 7 and the fan motor assembly 5 in the present invention may be arranged in parallel along the first direction W (or the second direction X), and the nozzle 7 and the fan motor assembly 5 may at least partially overlap each other based on the projection of the same vertical plane. 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. According to the invention, through the improvement of the air channel, the long-distance air flow stroke of the air flow passing through the fan motor assembly and the nozzle in the single direction in the prior art is divided into at least two short-distance air flow strokes in opposite directions, and the two short-distance air flow strokes can be mutually parallel, so that the industrial technical barrier that the fan motor assembly and the nozzle must be sequentially arranged in the height direction is broken through, the overall height of the fan can be greatly reduced, the gravity center of a product is also reduced, and the stability of the standing posture of the product is improved. 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 at two sides of the body 10, the nozzle 7 has a semi-frame-shaped nozzle body 70, the nozzle body 70 is bridged on a first side surface of the body 10 facing to the first direction W, and 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 has an inverted U shape, and the nozzle body 70 may be rotated at a certain angle with respect to the body 10 based on an axis of the opening of the body 10 as a rotation axis 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 elevating 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.

In a preferred embodiment, the receiving space 75 has two replacement passages for the filter 2 to enter and exit the receiving space 75 (the U-shaped nozzle body 70 naturally has two oversized openings communicating with the inner receiving space 75), the extension direction of the replacement passages is perpendicular to the second direction, the filter 2 has a first stroke from the body 10 to enter and exit the receiving space 75 along the second direction, and a second stroke from the replacement passages to enter and exit the receiving space 75. The height of the accommodating space 75 and the height J of the replacing passage are both greater than the height K of the filter 2, and the width of the accommodating space 75 and the width of the replacing passage are both greater than the width of the filter 2.

Fig. 4 is a schematic diagram of a fan connection functional module according to the present invention. As shown in fig. 4, in the present invention, not only the body 10 may be disposed in the central region of the nozzle body 70 as a whole, but also different structural layouts of the region may be more fully developed to enhance the expansion function of the fan, and the module having the expanded function and the body 10 may be disposed in the central region of the nozzle body 70 together. The first side surface of the fan facing the first direction W and the first side surface of the nozzle body 70 of the present invention form an accommodating space 75, and the accommodating space 75 is provided with a first connecting terminal 112. The fan further includes at least one function expansion element 9 disposed in the accommodating space 75, and the second contact terminal 91 of the function expansion element 9 is electrically connected to the first connection terminal 112. For example, the first side of the body 10 is provided with the first connection terminal 112, and the first side of the body 10 supports the lower surface of the function expanding member 9. The second contact terminal 91 is disposed on the lower surface of the function expansion piece 9, and the second contact terminal 91 and the first connection terminal 112 are in butt-joint conduction along the second direction X. In a preferred embodiment, the second contact terminal 91 is connected to the power supply circuit board of the fan base by a wire, but not limited thereto.

In this embodiment, the function expansion piece 9 is one of the following: an electronic humidifier; the mobile terminal comprises an electronic aromatherapy machine, an LED lamp, an electronic mosquito dispeller, an electronic display screen and a charging seat for charging the mobile terminal, but not limited to this. The function expansion member 9 may be an ejection member, an exhaust port of which is exposed in the accommodation space 75, and the air flow ejected from the nozzle 7 passes through the exhaust port of the ejection member, but not limited thereto. In a preferred scheme, the air outlets distributed along the nozzle are all provided with coanda surfaces, an air channel which penetrates through the accommodating space 75 in the nozzle body 70 from the first side of the nozzle body 70 to the second side of the nozzle body 70 is formed through the coanda surfaces, the air channel drives part of air on one side of the nozzle body 70 to move towards the air outlet side of the nozzle body 70, the air outlet of the spraying part is arranged in the range of the air channel formed by the air outlets, and the part of air passing through the nozzle body 70 flows through the air outlet of the spraying part to mix functional gas exhausted by the spraying part into air flow jetted by the fan. For example: the function expansion member 9 is an electronic humidifier, and the air flow discharged from the nozzle 7 passes through an exhaust port of the electronic humidifier. The inner periphery of the nozzle 7 is provided with an air outlet which is opened towards the same side, the air outlet is provided with a coanda surface, part of air on one side of the nozzle body 70 is driven to move towards one side of the air outlet of the nozzle body 70, and the part of air passing through the nozzle body 70 flows through the air outlet of the electronic humidifier, so that the air flow ejected by the fan is more moist on the whole, the functional combination of the electronic humidifier and the fan is realized, and the humidifying effect of the fan is enhanced. Similarly, the function expansion piece 9 can also be an electronic aromatherapy machine, and the air flow sprayed by the nozzle 7 passes through an exhaust port of the electronic aromatherapy machine. The air outlet with the coanda surface can be used, so that the electronic aromatherapy machine and the fan are combined in a functional mode, the room odor improving effect of the fan is enhanced, and the details are omitted. The shape of the nozzle body 70 in the invention can not only provide a channel for replacing the filter screen on the premise of not moving the nozzle body 70; and the continuous coanda surface formed by the annularly arranged air outlets is also helpful for mixing more functional gas of the jet part into the air flow jetted by the fan to realize the combination of functions.

Fig. 5 is a perspective view of the fan of the present invention. Fig. 6 is a sectional view taken along line B-B in fig. 5. Fig. 7 is a sectional view taken along line C-C in fig. 5. Fig. 8 is an exploded view of the fan of the present invention. As shown in fig. 5 to 8, 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 intake bracket 14, an intake cover 3 providing an air inlet, a filter 2, and a top cover 11, which are disposed from bottom to top in the second direction X. The base 6 includes a power supply box upper cover 61, a power supply board 62, a rotating synchronous motor 63, a rotating bracket 64, a base 65 and a base cover 66, and the upper components supported by the power supply box upper cover 61, the fan motor component 5, the nozzle 7 of the air inlet hood 3 and the like can horizontally rotate in situ through the rotation of the rotating synchronous motor 63. According to the invention, the vacant central area of the nozzle 7 in the prior art is fully utilized, the body 10 is integrally arranged in the central area of the nozzle 7, and the air inlet of the body 10 is positioned in the range of the inverted U-shaped air channel, so that the volume of a product is greatly reduced, and the cost of product transportation and product storage is reduced.

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, and the lateral wall at every inner shell 4 both ends is equipped with first buckle 43, screw 42 and exposes open-ended semicircular spacing groove 41, two inner shells 4 form an annular groove after involutory. The inner sides of the two ends of the nozzle body 70 are respectively provided with a first air inlet 72 and a second air inlet 73, and the first air inlet 72 and the second air inlet 73 are respectively communicated with an opening.

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 mesh form inlet port 81. The side walls of the two ends of the housing 8 are provided with a second buckle 84, a semicircular split part 82 and a screw hole 83. The second catches 84 of the outer case 8 engage with the first catches 43 of the inner case 4, respectively.

The lower surfaces of the two side support frames 13 are connected to the air inlet bracket 14, and the upper surfaces of the side support frames 13 and the screw holes 83 at the upper end of the butted shell 8 are connected together through a screw hole 122 of the annular connecting frame 12. The inner side of the annular connecting frame 12 is provided with a positioning clamping groove 121. The height of the shell 8 is larger than that of the fan motor component 5, and a space for accommodating the filter 2 and the air inlet cover 3 is provided between the two side supporting frames 13 on the upper part of the surrounded shell 8. The lower surface of air inlet support 14 is equipped with spliced pole 141, and the periphery of fan motor subassembly 5 is equipped with spread groove 523, and spliced pole 141 pegs graft in spread groove 523, and air inlet cover 3 is connected in the upper surface of air inlet support 14 for air inlet cover 3 can be connected in fan motor subassembly 5's air intake department through air inlet support 14.

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 23 (see fig. 20), a first annular support frame 22 (see fig. 20) for fixing a first annular sealing member 21 (see fig. 20) is arranged on a first side of the tubular air filter 23, a slot is arranged on the lower surface of the top cover 11, and the slot 56 of the top cover 11 is detachably clamped with the first annular support frame 22.

The lower surface of the top cover 11 is provided with a positioning buckle 111 detachably engaged with the positioning clamping groove 121 of the annular connecting frame 12 in a rotating manner. When the top cover 11 is engaged with the annular frame 12, the top cover 11 and the air inlet bracket 14 sandwich the upper and lower end surfaces of the filter 2. The second side of the tubular air screen 23 is provided with a second annular support bracket 24 (see fig. 20) to which a second annular seal 25 (see fig. 20) is secured. The second annular support bracket 24 is connected to the intake air bracket 14. A first side of the tubular air screen 23 is sealed to the top cover 11 by a first annular seal 21 and a second side of the tubular air screen 53 is sealed to the air intake bracket 14 by a second annular seal 25. The material of the first and second

annular seals

21, 25 is preferably a slow rebound sponge. The media of the tubular air filter 23 may be an existing air filter or an air filter of the future invention, but is not limited thereto.

FIG. 9 is a partially exploded view of one embodiment of the fan of the present invention. Fig. 10 is a perspective view of an air inlet in the fan of the present invention. FIG. 11 is a schematic view of an air inlet of the fan of the present invention. Fig. 12 is a sectional view taken along line D-D in fig. 11. As shown in fig. 9 to 12, the body 10 of the fan of the present invention is provided with an inlet cowl 3 having an air inlet. An inlet cowl 3 is provided downstream of the filter 2, the inlet cowl 3 being provided in an annular region defined by the filter 2, for passing the air flow filtered by the filter 2 through the inlet cowl 3 into a fan-motor assembly 5. For the fan motor assembly 5, the air inlet hood 3 is arranged at the upstream of the air inlet of the fan motor assembly 5, and the air inlet hood 3 can disturb and muffle the air flow entering the fan motor assembly 5. The periphery of the air inlet cover 3 along the first direction W is provided with a plurality of wave-shaped spoilers 32 which are circumferentially distributed and arranged at intervals, the wave-shaped spoilers 32 extend from the periphery of the air inlet cover 3 to the center, gaps between adjacent wave-shaped spoilers 32 form an air inlet channel 33 which is arranged in a vortex manner, and the wave-shaped spoilers 32 can divide the sucked air flow into a plurality of air flows for the first time, so that the effects of noise reduction and noise reduction are achieved. In this embodiment, the inside of the intake cover 3 is hollow to form a vortex passage 34, a first end of the vortex passage 34 is respectively communicated with the intake passage 33 along a circumferential direction perpendicular to the first direction W, and a second end of the vortex passage 34 is communicated with the intake port of the fan motor assembly 5 along the second direction X, so as to further reduce noise. Along the communication direction of the air inlet channel 33, two ends of the air inlet channel 33 are respectively provided with an air inlet 31 exposed out of the periphery of the air inlet cover 3 and a narrow slit communicated with the vortex channel 34 so as to further reduce noise.

In a preferred embodiment, the closer to the swirl passage 34 in the communication direction of the intake passage 33, the smaller the flow area of the intake passage 33; the closer to the intake port 31, the larger the flow area of the intake passage 33, so as to further reduce noise.

In a preferred embodiment, a rotating impeller 53 is provided in the fan-motor assembly 5, the direction of the wave-shaped protrusions of each wave-shaped spoiler 32 is identical to the rotation direction of the impeller 53, and the angle of each air inlet passage 33 entering the scroll passage 34 is different, so as to further reduce noise.

In a preferred embodiment, a concave arc notch 35 is formed on one side of each wave-shaped spoiler 32 facing the air inlet of the fan motor assembly 5, so as to extend the distance between the sucked air and the impeller, and also has the auxiliary effects of sound and noise reduction, thereby further reducing the noise.

Fig. 13 is a perspective view of a fan motor assembly in the fan of the present invention. Fig. 14 is a sectional view taken along line E-E in fig. 13. Fig. 15 is an exploded view of a fan motor assembly in the fan of the present invention. Fig. 16 is a perspective view of an air outlet three-way seat in a fan motor assembly of the fan of the present invention. As shown in fig. 13 to 16, the fan motor assembly 5 in 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 are sequentially combined along the first direction W. The air guide cover 51 sealingly communicates the scroll passage 34 of the intake cover 3 with the air guide cover 52.

Wherein, a plurality of first positioning seats 501 and a plurality of first screw lugs 508 are arranged around the periphery of the air outlet tee joint seat 50. A motor 56 is disposed 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 disposed around the periphery of the motor bracket 54, and the motor bracket 54 is provided with a through hole for the rotating shaft of the motor 56 to pass through. A rotary impeller 53 is arranged between the lower surface of the motor bracket 54 and the wind scooper 52, the impeller 53 is in transmission connection with the motor 56 through a rotating shaft, and a plurality of third positioning seats 521 and a plurality of second screw lugs 522 are arranged around the periphery of the wind scooper 52. The air outlet three-way seat 50 is screwed with the air guiding cover 52, and each second positioning seat 541 of the motor bracket 54 is connected with the first positioning seat 501 and the third positioning seat 521 through a flexible connector and then 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 guiding cover 52 and the air outlet three-way seat 50 based on the flexible connector on the same horizontal plane. This corresponds to the motor bracket 54 being suspended between the wind scooper 52 and the wind outlet tee 50. The flexible connecting piece and each positioning seat jointly form a shock absorber, so that when the fan motor assembly 5 works, the motor support 54 cannot be in contact with the air guide cover 52 and the air outlet tee joint seat 50 when vibration is generated, contact points of the motor support are all transmitted by the shock absorber, noise is greatly reduced, and stability of the fan can be kept.

In this embodiment, the top surface of the positioning vibration-damping pad 55 may be formed of a flat surface, and the purpose of the top surface is to convert the upward vibration into a flat surface motion when the power system vibrates, so that the vibration is balanced. The lower part of the positioning damping pad 55 may be composed of a cone, and the surfaces in contact with the cone are all in bump contact, so as to reduce the contact area and achieve the damping effect. The middle of the positioning damping pad 55 is composed of a hollow blind hole, and the purpose is that when the power system vibrates, the damper generates elastic deformation by utilizing the middle blind hole to achieve the damping effect, and the hole and the upper support form a closed hollow hole after being assembled, so that the air in the blind hole is locked and rapidly recovers elastic deformation under the action of air pressure during vibration.

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 connector is a nail-shaped positioning damping pad 55, and the positioning damping pad 55 penetrates through and supports the through holes of the first positioning seat 501, the second positioning seat 541 and the third positioning seat 521. The positioning vibration damping pad 55 comprises a rod portion, an outer expanding cone and an outer expanding shoulder, wherein the outer expanding cone and the outer expanding shoulder are respectively positioned at two ends of the rod portion, the maximum diameter of the outer expanding cone and the maximum diameter of the outer expanding shoulder are larger than the diameter of the rod portion, the rod portion penetrates through holes of the first positioning seat 501, the second positioning seat 541 and the third positioning seat 521, and the first positioning seat 501, the second positioning seat 541 and the third positioning seat 521 are clamped and clamped between the outer expanding cone and the outer expanding shoulder. The positioning damping pad 55 is provided with a hollow blind hole along the axial direction of the first direction W, and the hollow blind hole extends from the outward-expanding frustum to the rod portion at least. Or the hollow blind hole at least extends from the external expanding frustum to the external expanding frustum.

In a preferred embodiment, an annular motor noise reduction cotton 57 is disposed around the outer circumference of the motor 56 between the motor bracket 54 and the outlet tee 50, so that the noise caused by the high-speed rotation of the motor and the impeller is further reduced.

In this embodiment, the air outlet tee 50 includes an air inlet 507 disposed on the air outlet side of the impeller, a first air outlet 504 and a second air outlet 505 respectively communicated with the nozzle 7, and a diversion wall 502 for diverting the air flow passing through the air inlet 507 and guiding the air flow to the first air outlet 504 and the second air outlet 505 respectively, and two 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 at a first side of the air outlet tee seat 50, the diversion wall 502 is located at the center of a 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 two ends of the second side of the air outlet tee seat 50. The first outlet 504 and the second outlet 505 are respectively exposed at two sides of the body 10, and an air outlet direction of the first outlet 504 and an air outlet direction of the second outlet 505 are coaxial and perpendicular to an air inlet direction of the air inlet 507. The two sides of the flow dividing wall 502 respectively form a first guiding slope and a second guiding slope which are symmetrical, 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 protrusions at the two ends of the shunting wall 502 in the second direction X extend to the air inlet 507 along the second direction X, and together form a U-shaped plate-shaped shunting wall, so that the air flow passing through the air inlet 507 can be shunted on the premise of reducing noise. In this embodiment, the shunting wall 502 is arranged based on the central axis of the air inlet 507, and equally divides the flow area of the air inlet 507. The inner wall of the air outlet three-way seat 50 is provided with a flow deflector 506 extending from the air inlet 507 to the second side of the air outlet three-way seat 50, but not limited thereto. 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 flow guiding step extending from the second guiding slope to the second air outlet 505, and the sinking distance of the sinking 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 provide a space for the base 6, but not limited thereto. The air outlet tee joint seat 50 integrates flow guiding, flow dividing and flow dividing, so that the height of the fan motor assembly 5 is greatly reduced, and the total height and the volume of the whole fan are further reduced.

In a preferred embodiment, the inner wall of the air outlet three-way seat 50 is provided with a flow deflector extending from the air inlet 507 to the first air outlet 504 or the second air outlet 505, but not limited thereto.

The air inlet 507 is an annular nozzle, a distance from a nozzle of the annular nozzle to the first air outlet 504 or the second air outlet 505 along the first direction W is d, diameters of the first air outlet 504 and the second air outlet 505 are h, and a ratio of d to h ranges from 2.0 to 3.5. After the air flow generated by the impeller 53 enters the air inlet 507 of the air outlet tee joint 50, the air flow can rotate the flow direction at least 90 degrees within a short distance, if the ratio of d to h is too small, the air pressure of the air flow is reduced, the air outlet quantity is reduced, and the air supply distance is influenced; conversely, if the ratio of d to h is too large, negative eddy currents will form, and turbulent flow will produce loud noise.

In a preferred embodiment, the range of the ratio 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.

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

Fig. 17 to 20 are schematic views illustrating an installation process of the fan of the present invention. As shown in fig. 17 to 20, the installation process of the fan of the present invention is as follows: firstly, the air inlet cover 3, the air inlet bracket 14, the fan motor component 5 and the base 6 are connected through the first inner shell 4. The nozzle 7 with the annular shoulder 74 at both ends is inserted into the exposed semicircular limiting groove 41 of the inner casing 4 along the horizontal direction, so that the first air inlet 72 and the second air inlet 73 of the annular shoulder 74 are respectively communicated with 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 by the sealing ring 59. Next, the second inner case 4 is snapped into the first inner case 4 and screwed into the screw hole 42, and the annular shoulder 74 is engaged with 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, the two shells 8 are buckled on the periphery of the inner shell 4, the side support frames 13 are installed, and the upper ends of the side support frames 13 and the upper ends of the shells 8 are screwed together through the annular connecting frame 12. Finally, the filter 2 is placed in the space between the inner wall of the housing 8 and the outer periphery of the air inlet cover 3, and the filter 2 is hermetically clamped between the top cover 11 and the air inlet bracket 14 by the rotation locking of the top cover 11 and the annular connecting frame 12.

The installation method of the invention changes the method of sleeving the nozzle 7 on the body part along the vertical direction in the prior art, is more beneficial to the sealing of the air duct and reduces the installation difficulty.

Fig. 21 to 23 are schematic views illustrating a first filter flow state of the fan according to the present invention. As shown in fig. 21 to 23, a first method for replacing a filter by a fan according to the present invention employs an upper fan, and the replacement process is as follows:

the filter 2 to be replaced is separated in the body 10.

The filter 2 to be replaced is introduced into the accommodating space 75 from the body 10 along the second direction X.

The filter 2 to be replaced is removed from the accommodation space 75 along the replacement path out of the accommodation space 75.

The unused filter 2N is moved into the accommodation space 75 along the replacement path.

The unused filter 2 is pressed from the accommodation space 75 into the body 10 in the first direction W.

An unused filter 2 is incorporated in the body 10.

In a preferred embodiment, the filter 2 is a tubular air screen, and the fan further comprises a top cover 11 for crimping a first side of the tubular air screen in the first direction W and an air inlet bracket 14 for supporting a second side of the tubular air screen in the second direction X.

The separation of the filter 2 to be replaced comprises: the top cover 11 is detached from the body 10, exposing the filter 2 to be replaced, and the filter 2 is pulled out of the body 10 from the air inlet bracket 14 in the second direction X.

The combination of the unused filter 2 includes: the filter 2 is self-pressed in the first direction W to the inlet bracket 14 of the body 10, and the top cover 11 is combined with the body 10 to close the unused filter 2.

If the top cover 11 is provided with the function expansion piece, the top cover 11 is unscrewed after the function expansion piece is removed preferentially in the same manner, which is not described herein again.

The filter screen is changed to the fan in this embodiment only needs the action of once part disassembling (only pull down top cap 11 and just can change the filter screen), also only needs to change a filter screen, has alleviateed the work load and the time of changing the filter screen greatly, has improved humanized experience.

Fig. 24 to 27 are schematic diagrams illustrating a second filter flow state of the fan according to the present invention. As shown in fig. 24 to 27, the second method for replacing the filter by the fan of the present invention employs an upper fan, and the replacement process is as follows:

the nozzle body 70 is rotated to the second state.

The filter 2 to be replaced is separated in the body 10.

The filter 2 is pulled out of the body 10 in the second direction X and the filter 2 is moved out of the fan, avoiding the nozzle body 70.

The unused filter 2N is pressed into the body 10 in the second direction X avoiding the nozzle body 70.

An unused filter 2 is incorporated in the body 10.

The nozzle body 70 is rotated to the first state.

Similarly, the filter screen is changed to fan in this embodiment only needs once part to disassemble the action (only pull down top cap 11 and just can change the filter screen), also only needs to change once the filter screen, has alleviateed the work load and the time of changing the filter screen greatly, has improved humanized experience.

In conclusion, the fan and the method for replacing the filter of the fan can change the moving direction of the air flow in the fan, reduce the whole volume and reduce the use cost.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A fan, comprising:

a body (10) comprising an air inlet, an air outlet, a removable filter (2) and a fan-motor assembly (5) for generating an air flow through the body (10) in a first direction; 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;

the air outlet of the fan motor assembly (5) is connected with two guide air passages, the guide air passages are respectively communicated with openings on two sides of the body part (10), the nozzle (7) is provided with a semi-frame-shaped nozzle body (70), two ends of the nozzle body (70) are respectively and rotatably communicated with the openings, the nozzle body (70) is provided with a first state of bridging a first side surface of the body part (10) facing to the first direction, and a second state of avoiding the nozzle body (70) from the filter (2) based on a projection area of a second direction after the nozzle body (70) rotates based on the openings, and the filter (2) is provided with a lifting stroke of avoiding the nozzle body (70) along the second direction based on the second state of the nozzle body (70) to enter and exit the body part (10).

2. The fan according to claim 1, wherein a projection of the elevating stroke of the filter (2) based on the second direction does not overlap with a projection of the second state of the nozzle body (70) based on the second direction.

3. The fan as claimed in claim 1, wherein the nozzle body (70) is shaped as an inverted U, the inner sides of the two ends of the nozzle body (70) are respectively provided with a first air inlet (72) and a second air inlet (73), and the first air inlet (72) and the second air inlet (73) are respectively communicated with one of the openings.

4. The fan as claimed in claim 3, wherein the first and second intake ports (72, 73) are each provided with an annular shoulder (74), and the outer edges of the openings at both sides of the body (10) are provided with an annular groove, and the annular shoulders (74) are engaged with the annular groove and rotated based on the annular groove.

5. The fan according to claim 4, characterized in that the angular range of rotation of the annular shoulder (74) based on the annular groove is based between ± 60 degrees in the second direction.

6. The fan according to claim 1, characterized in that said filter (2) is a tubular air screen having its axis oriented in said first direction, said fan further comprising a top cover (11) crimped to a first side of said tubular air screen in said first direction and an air intake bracket (14) supporting a second side of said tubular air screen in said second direction.

7. The fan according to claim 1, wherein the first direction is a direction of gravity and the second direction is an anti-gravity direction, the air inlet is located at an upper portion of the body (10) in the direction of gravity, the air outlet is located at a lower portion of the body (10) in the direction of gravity, and the fan-motor assembly (5) is located at a region between the air inlet and the air outlet.

8. The fan according to claim 1, characterized in that said nozzle (7) has at least one outlet duct, the extension of which is parallel to said first direction, said air flow passing through said outlet duct in a second direction, said body (10) having at least one guide duct for changing the direction of the air flow, said guide duct extending in a third direction perpendicular to said first direction, communicating respectively with the outlet of said fan-motor assembly (5) and with said nozzle (7).

9. A method of replacing a filter with a fan according to claim 1, comprising the steps of:

rotating the nozzle body (70) to a second state;

-separating the filter (2) to be replaced in the body (10);

-pulling the filter (2) out of the body (10) in a second direction, the filter (2) being removed from the fan avoiding the nozzle body (70);

pressing unused filter into the body (10) in a second direction away from the nozzle body (70);

-combining the unused filter (2) in the body (10);

rotating the nozzle body (70) to a first state.

10. The fan filter change method as recited in claim 9, wherein the filter (2) is a tubular air screen, the fan further comprising a top cover (11) crimping a first side of the tubular air screen in the first direction and an air inlet bracket (14) supporting a second side of the tubular air screen in the second direction;

-detaching the filter (2) to be replaced comprises: separating the top cover (11) from the body (10), exposing the filter (2) to be replaced, and pulling the filter (2) out of the body (10) from the air inlet bracket (14) along a second direction;

the combination of the unused filter (2) comprises: -self-pressing the filter (2) in a first direction to the air intake bracket (14) of the body (10), -combining the top cover (11) with the body (10), closing the unused filter (2).