CN110645194A

CN110645194A - Bladeless fan for purifying air

Info

Publication number: CN110645194A
Application number: CN201911053260.4A
Authority: CN
Inventors: 应辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-01-03

Abstract

The invention provides a bladeless fan for purifying air, which comprises: a body including a first air inlet, a second air inlet, an air outlet, and a fan motor for generating an air flow through the body, the first and second air inlets being spaced apart in a first direction; a nozzle connected to the air outlet for receiving an air flow from the body and emitting the air flow; and a filter disposed in the body in a region between the first and second air inlets downstream of the air inlet. The invention can lead the air to pass through the filter more uniformly, prolongs the service life of the filter, reduces the times of replacing the filter, reduces the use cost of the air purifier, is more beneficial to improving the indoor environment and provides cleaner living environment.

Description

Bladeless fan for purifying air

Technical Field

The invention relates to the field of refrigeration equipment, in particular to a bladeless fan for purifying air.

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 prior art bladeless fan with an air screen. As shown in fig. 1, most of them have a large nozzle 91, a housing 93, a base 94, a screen 95, a fan motor 96, and a mesh inner container 97. Wherein, shell 93 with the air inlet mesh sets up on base 94, is equipped with filter screen 95 in the shell 93, is equipped with mesh inner bag 97 in the filter screen 95, is equipped with fan motor 96's first air inlet in the mesh inner bag 97, and nozzle 91 sets up in shell 93 top, and fan motor 96's air outlet intercommunication nozzle 91. The indoor air sequentially passes through the meshes of the shell 93 and the filter screen 95 to be filtered, then enters the mesh inner container 97, is sucked into the fan motor 96 for pressurization, and then is sprayed out from the nozzle 91. In the structure, in order to maximize the total area of the air inlet mesh holes and the area of the filter screen, the air inlet mesh holes are distributed on the surface of the shell in the full height, and the filter screen with the same height as the air inlet mesh hole area is arranged. The air inlet mesh holes of the shell and the filter screen 95 are arranged in the same section along the height direction, but because the first air inlet of the fan motor 96 is usually arranged in the shell 93 in a region closer to the bottom of the shell 93 for air suction effect, the air in the lower air inlet mesh holes can almost linearly reach the first air inlet of the fan motor 96, the suction force obtained in short distance is larger, the air in the upper air inlet mesh holes needs to pass through a farther route to reach the first air inlet, the suction force obtained in long distance is obviously reduced, in this case, the suction force of the fan motor 96 is obviously different for the air in the air inlet mesh holes with different heights, the suction amount of the air in the air inlet mesh holes closer to the bottom of the shell 93 is obviously larger than the suction amount of the air in the air inlet mesh holes far away from the bottom of the shell 93, the difference reaches 2.5 times to 3 times, so that the use, in short, after a period of use, the lower filter screen 95 near the bottom of the housing 93 becomes the heavily used filter screen portion 95B, and the upper filter screen 95 far from the bottom of the housing 93 becomes the lightly used filter screen portion 95A, but at this time, because the filter screen portion 95B mainly used for filtering the air is used seriously, the filter screen portion must be replaced, the structure greatly shortens the service life of the filter screen 95, and causes a lot of filter screens to be discarded under the condition of not being fully used, thereby causing waste of resources.

Moreover, 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 95 is sealed between the downstream three-dimensional sealing rubber strip and the mesh inner container 97, the cost of the three-dimensional sealing rubber strip is extremely high, and the sealing effect is poor after long-time use. When the filter screen 95 is replaced, the two shells need to be detached respectively, the filter screens are replaced respectively, and then the shells are installed again, so that the process is complicated, and the humanized experience is poor.

Accordingly, the present invention provides a bladeless fan for purifying air.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide the bladeless fan for purifying the air, which overcomes the defects in the prior art, can ensure that the air can more uniformly pass through the filter, prolongs the service life of the filter, reduces the times of replacing the filter, reduces the use cost of the air purifier, is more beneficial to improving the indoor environment and provides a cleaner living environment.

An embodiment of the present invention provides a bladeless fan for purifying air, including

A body including a first air inlet, a second air inlet, an air outlet, and a fan motor for generating an air flow through the body, the first air inlet and the second air inlet being spaced apart in a first direction;

a nozzle connected to the air outlet for receiving an air flow from the body and emitting the air flow; and

a filter disposed in the body in a region between the first and second air inlets downstream of the air inlet.

Preferably, the body comprises a casing, the first and second air inlets being formed at respective ends of the casing, at least part of the casing forming a diffusion channel for directing the air flow into the filter.

Preferably, the upstream surface of the filter is exposed to the diffusion channel.

Preferably, the first direction is a height direction of the body.

Preferably, the housing is a barrel-shaped housing, the filter comprises a tubular air screen disposed at an inner periphery of the barrel-shaped housing, and a tubular gap between an upstream surface of the tubular air screen and an inner wall of the barrel-shaped housing forms the diffuser passage.

Preferably, the body further comprises an air inlet cover plate detachably connected to the opening of the barrel-shaped housing, a plurality of first air inlets arranged around the tubular air filter screen are arranged along the edge of the air inlet cover plate, and the first air inlets are communicated with the first end of the diffusion channel.

Preferably, one side of air inlet apron is equipped with the hoop constant head tank, hoop constant head tank detachably block the first side of tubulose air filter screen, the first side of tubulose air filter screen with it is sealed through annular sealing member between the air inlet apron.

Preferably, the second side of the tubular air screen abuts the bottom of the barrel shaped housing, the second side of the tubular air screen being sealed from the outer shell by an annular seal.

Preferably, the bottom of the barrel-shaped housing is bordered by a plurality of second air inlets arranged around the tubular air screen, said second air inlets communicating with the second end of the diffuser passage.

Preferably, a base having a rotation shaft and a motor driving the rotation shaft, the rotation shaft supporting the body is further included.

The bladeless fan for purifying the air can enable the air to uniformly pass through the filter, prolongs the service life of the filter, reduces the times of replacing the filter, reduces the use cost of the air purifier, is more beneficial to improving the indoor environment and provides a cleaner living environment.

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 prior art bladeless fan with an air screen.

Fig. 2 is a schematic view of a bladeless fan according to the present invention.

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

Fig. 4 is an exploded view of the air intake cover plate, the filter screen and the housing of the bladeless fan of the present invention.

Fig. 5 is a schematic view of the combination of the air intake cover plate and the filter screen in the bladeless fan of the present invention.

Fig. 6 is a cross-sectional view of fig. 5.

Fig. 7 is a bottom view of fig. 5.

Fig. 8 is an exploded view of the air intake cover and the filter screen of the bladeless fan of the present invention.

Fig. 9 is a cross-sectional view of fig. 8.

Fig. 10 is a schematic exploded view of a fan motor and an inner casing of a bladeless fan according to the present invention.

Fig. 11 is a schematic view of a combined state of a flow guide cover and a connection housing in the bladeless fan according to the present invention from a first viewing angle.

Fig. 12 is a bottom view of fig. 11.

Fig. 13 is a top view of fig. 11.

Fig. 14 is a schematic view of a combined state of a flow guide cover and a connection housing in the bladeless fan according to the present invention from a second viewing angle.

Fig. 15 is an exploded view of a base in the bladeless fan of the present invention.

Fig. 16 is a perspective view of a supporter in the bladeless fan of the present invention.

Fig. 17 is a schematic view of the base and the housing of the bladeless fan according to the present invention.

Fig. 18 is a schematic view of an air duct of the bladeless fan of the present invention.

Fig. 19 is an exploded view of a nozzle of the bladeless fan according to the present invention.

FIG. 20 is a cross-sectional view of a nozzle in the bladeless fan of the present invention.

Fig. 21 is a top view of the bladeless fan of the present invention.

Fig. 22 to 27 are schematic views illustrating a flow state of replacing the filter net of the bladeless fan according to the present invention.

Reference numerals

1 nozzle 5 air screen

11 housing 51 first annular seal

110 internal passage 52 first annular retainer

12 annex 53 tubular air filter

121 exhaust port 54 second annular retainer

122 wind collection chamber 55 second annular seal

1221 first Cavity 56 socket

1222 unused air screen of second cavity 5N

123 Heat insulation channel 6 fan motor

124 wind inlet 61 drainage cover

13 heating means 611 spoiler

14 cable 612 drainage sheet

15 cover plate 613 flow guide

16 fifth annular seal 62 Upper cover

17 fixed part 63 motor

10 body 64 middle cover

2 air inlet cover plate 65 impeller

21 cover plate member 66 impeller cover

211 first positioning column 67 positioning piece

22 air screen mount 68 fourth annular seal

221 insert 69 suction inlet

222 first air inlet 7 inner casing

223 positioning hole 71 connecting shell

224 snap 72 mesh inner container

225 annular positioning groove 73 slot

23 third ring seal 91 nozzle

3 outer case 93 outer case

31 first air intake channel 94 base

32 second air inlet channel 95 filter screen

33 diffusion channel 95A lightly used screen section

34 first opening 95B heavy duty screen section

35 second opening 96 fan motor

36 second air inlet 97 mesh inner container

4 base

41 support piece

411 sinking shoulder

412 edge

413 supporting disk

42 outer casing

43 base plate

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 a bladeless fan according to the present invention. Fig. 3 is a perspective view of the bladeless fan of the present invention. As shown in fig. 2 and 3, the bladeless fan for purifying air of the present invention includes a body 10, a nozzle 1, a filter 5, and a base 4. The body 10 includes a first air inlet 222, a second air inlet 36, an air outlet, and a fan motor 6 for generating an air flow through the body 10, the first air inlet 222, the second air inlet 36 being spaced apart in a first direction, which is a height direction of the body 10, i.e., a straight direction defined by reference numeral A, B. In the present embodiment, the first direction is also the direction of the rotation axis of the rotary body 10 of the base 4 and the direction of the air flow guided by the fan motor 6, but the present invention is not limited thereto. The nozzle 1 is connected to an air outlet for receiving an air stream from the body 10 and emitting the air stream. The filter 5 is disposed in the body 10 in the region between the first air inlet 222 and the second air inlet 36, downstream of the air inlets. The base 4 has a rotation shaft and a motor for driving the rotation shaft, and the rotation shaft supports the body 10. In the present embodiment, the body 10 includes the casing 3, the first air inlet 222 and the second air inlet 36 are formed at both ends of the casing 3, respectively, and at least a part of the casing 3 forms the diffusion passage 33 for guiding the air flow into the filter 5. In the present embodiment, the diffusion channel 33 is a tubular space, and the axial direction of the tubular space is parallel to the first direction, but not limited thereto. The casing 3 is a barrel-shaped casing, and the filter 5 includes a tubular air screen 53, the tubular air screen 53 being disposed on the inner periphery of the barrel-shaped casing, and the tubular gap between the upstream surface of the tubular air screen 53 and the inner wall of the barrel-shaped casing forming the diffuser passage 33. The upstream surface of the filter 5 is exposed to the diffusion passage 33 so as to guide the air flow more uniformly to the upstream surface of the filter 5. In this embodiment, the body 10 further comprises an air inlet cover plate 2, the air inlet cover plate 2 is detachably connected to the opening of the barrel-shaped housing, at least one first air inlet 222 arranged around the tubular air filter 53 is arranged along the edge of the air inlet cover plate 2, and the first air inlet 222 is communicated with the first end of the diffusion channel 33. At least one second air inlet 36 is arranged around the tubular air screen 53 at the edge of the bottom of the barrel-shaped housing, the second air inlet 36 communicating with the second end of the diffuser passage 33. In this embodiment, the annular upper and lower end surfaces of the tubular air screen 53 are sealed with the intake cover plate and the bottom of the barrel-shaped housing by annular sealing members, respectively. The air inlet on the casing of the bladeless fan for purifying air is not positioned at the air suction port of the straight fan motor, and the air flow is more uniformly guided to the whole upstream surface of the filter 5 through the diffusion channel formed by the casing, so that the filter 5 can be uniformly used, the service life of the filter is greatly prolonged, and the frequency of replacing the filter is reduced.

Fig. 4 is an exploded view of the air intake cover plate, the filter screen and the housing of the bladeless fan of the present invention. Fig. 5 is a schematic view of the combination of the air intake cover plate and the filter screen in the bladeless fan of the present invention. Fig. 6 is a cross-sectional view of fig. 5. Fig. 7 is a bottom view of fig. 5. Fig. 8 is an exploded view of the air intake cover and the filter screen of the bladeless fan of the present invention. Fig. 9 is a cross-sectional view of fig. 8. As shown in fig. 4 to 9, the intake cover 2 of the present invention includes an annular cover member 21 and an annular air screen fixing member 22, and a first side of the cover member 21 is provided with a plurality of first positioning posts 211. The first side of the air screen fixing member 22 is provided with a plurality of positioning holes 223, and the cover plate member 21 is inserted into the positioning holes 223 through the first positioning posts 211 to realize connection with the air screen fixing member 22. The inner periphery of air screen fixing member 22 is provided with a circumferentially extending insert 221 connected to inner case 7. The outer periphery of air screen retainer 22 is provided with a plurality of circumferentially arranged first air inlets 222. The periphery of the second side of air screen fixing member 22 is provided with a circumferential positioning groove 225, the circumferential positioning groove 225 is detachably engaged with the first side of the tubular air screen 53, and the first side of the tubular air screen 53 is sealed with the air inlet cover plate 2 by an annular sealing member. The outer periphery of air screen mount 22 is also provided with a snap 224 that mates with filter 5. Air screen mount 22 is sealed to inner housing 7 by a third annular seal 23, with third annular seal 23 preferably, but not limited to, a gasket.

With continued reference to fig. 4 to 9, the filter 5 of the present invention includes a tubular air filter 53, a first annular positioning member 52 for fixing the first annular sealing member 51 is disposed on a first side of the tubular air filter 53, a slot 56 is disposed on an outer circumference of the first side, and the slot 56 of the filter 5 is detachably engaged with the buckle 224 of the air intake cover 2. The second side is provided with a second annular retainer 54 holding a second annular seal 55. A first side of the tubular air screen 53 is sealed to the intake cover plate 2 by a first annular seal 51 and a second side of the tubular air screen 53 is sealed to the housing 3 by a second annular seal 55. The material of the first and second

annular seals

51, 55 is preferably a slow rebound sponge. The media of the tubular air filter 53 may be an existing air filter or an air filter of future inventions, but is not limited thereto.

Fig. 10 is a schematic exploded view of a fan motor and an inner casing of a bladeless fan according to the present invention. Fig. 11 is a schematic view of a combined state of a flow guide cover and a connection housing in the bladeless fan according to the present invention from a first viewing angle. Fig. 12 is a bottom view of fig. 11. Fig. 13 is a top view of fig. 11. Fig. 14 is a schematic view of a combined state of a flow guide cover and a connection housing in the bladeless fan according to the present invention from a second viewing angle. As shown in fig. 10 to 14, the inner casing 7 of the present invention includes a connection casing 71 and a mesh inner container 72, a first side of the connection casing 71 is engaged with one side of the mesh inner container 72, the fan motor 6 is fixed in the connection casing 71, and the fan motor 6 includes a flow guide cover 61, an upper cover 62, a motor 63, a middle cover 64, an impeller 65, an impeller cover 66, a positioning member 67, a fourth annular seal 68, and a suction inlet 69 which are sequentially assembled in a first direction. The motor 63 drives the impeller 65 to rotate, and after the air flow is guided from the mesh inner container 72 through the air suction inlet 69 and enters the fan motor 6, the pressurized air flow flows to the air outlet through the flow guide cover 61 along the first direction and finally enters the nozzle to be sprayed outwards. The fan motor 6 is sealed to the mesh bladder 72 by a fourth annular seal 68, the fourth annular seal 68 preferably being a sponge. The second side of the connecting housing 71 is provided with a slot 73 detachably engaged with the insertion buckle 221 to provide a circumferential slide-in channel.

The air outlet is arranged on the flow guide cover 61, a plurality of turbulence plates 611 for preventing air flow from forming a circumferential flow at the air outlet and a flow guide plate 612 for guiding the air to flow to the air outlet are arranged on the guide wall of one side of the flow guide cover 61 facing the impeller 65 at intervals, the plane where the flow guide plate 612 is located is parallel to the first direction, the flow guide plates 612 are converged at the air outlet to form a flow guide piece 613, the flow guide piece 613 comprises a plurality of flow guide wall bodies formed by extending the flow guide plates 612, the plane where the flow guide wall bodies are located is parallel to the first direction, the strength of the air flow of the fan motor 6 is enhanced, and noise in the process of guiding the air flow is reduced.

Fig. 15 is an exploded view of a base in the bladeless fan of the present invention. Fig. 16 is a perspective view of a supporter in the bladeless fan of the present invention. As shown in fig. 15 to 16, the bladeless fan middle base 4 of the present invention includes a support 41, a housing 42, a rotating electric machine, a bottom plate 43, and the like. Wherein, the supporting disk 413 at the center of the supporting member 41 supports the bottom of the barrel-shaped housing, and the periphery of the supporting disk 413 is provided with an edge 412 with a height lower than that of the supporting disk 413, and the supporting disk 413 and the edge 412 are excessively connected through a sinking shoulder 411. An escape space 414 is formed at the outer periphery of the support plate 413 by the sunken shoulder 411.

Fig. 17 is a schematic view of the base and the housing of the bladeless fan according to the present invention. As shown in fig. 17, the bottom of the barrel-shaped casing of the present invention is provided with a downward convex boss in the circumferential direction, the end surface of the boss facing the base 4 is provided with a plurality of first openings 34 arranged in a diffused manner from the center of the barrel-shaped casing to the periphery, and the first openings 34 are communicated with the diffusion channel 33. The inner side surface of the barrel-shaped shell towards which the lug boss faces is provided with a second opening 35 extending along the first direction, and the second opening 35 is communicated with the diffusion channel 33. The boss is located in the avoiding space 414 around the support disc 413 so as to increase the air flow of the second air intake channel 32 and make more air flow enter the diffusion channel 33 under the premise of keeping the height unchanged.

In a preferred embodiment, the first openings 34 correspond to the second openings 35 one by one, and each first opening 34 is communicated with the second opening 35 to form a three-dimensional air inlet. In this embodiment, the stereo air inlet forms a first projected area based on a first plane (corresponding to a horizontal plane) perpendicular to the axis of the rotation shaft of the base 4; the solid air intake port has a second projection area formed on a second plane (corresponding to a vertical plane) perpendicular to the axis of the rotation shaft passing through the base 4 and perpendicular to the opening direction of the second opening 35. In a preferred embodiment, the three-dimensional air inlet of the present invention may be an L-shaped three-dimensional air inlet, and the L-shaped three-dimensional air inlet includes a first opening 34 opened in a horizontal plane and a second opening 35 opened in a vertical plane, and an inner end of the first opening 34 communicates with a lower end of the second opening 35 to form an L-shaped opening together, so as to further increase the air flow rate of the second air inlet channel 32, but not limited thereto.

Fig. 18 is a schematic view of an air duct of the bladeless fan of the present invention. As shown in fig. 18, the cover plate member 21 has an arc-shaped air guide edge, the housing 3 has an annular edge protruding from the air screen fixing member 22, the arc-shaped air guide edge and the annular edge cooperate to form a first annular air guide slit for guiding the air flow into the first air inlet 222, the first end of the first annular air guide slit has an opening direction perpendicular to the first direction, and the second end of the first annular air guide slit, which communicates with the first air inlet 222, has an opening direction parallel to the first direction. In this embodiment, the first annular air guiding slit is used as the first air inlet channel 31 to achieve the air inlet function at the upper end of the casing 3, but not limited thereto. The base 4 and the bottom of the casing 3 are matched to form a second annular air guide slit for guiding the air flow to enter the second air inlet 36, the opening direction of the first end of the second annular air guide slit is perpendicular to the first direction, the opening direction of the second end of the communicated avoiding space of the second annular air guide slit is parallel to the first direction, so that the air is prevented from being directly sucked from the ground, the dust entering the bladeless fan is reduced, in addition, the avoiding space 414 is arranged, so that part of the dust can be deposited at the bottom of the avoiding space 414, and the space for depositing the dust is further provided. The first opening 34 and the second opening 35 are exposed in the avoidance space 414. In this embodiment, the second annular air guide slit is used as the second air inlet channel 32 to achieve the air inlet function at the lower end of the casing 3, but not limited thereto.

When the bladeless fan works, the fan motor 6 rotates to suck air flow, the air flow around the bladeless fan is guided to respectively enter the diffusion channel 33 between the outer shell 3 and the tubular air filter screen 53 from the first air inlet channel 31 annularly arranged at the upper end of the outer shell 3 and the second air inlet channel 32 annularly arranged at the lower end of the outer shell 3, the air flow is diffused in the diffusion channel 33, so that the air flow is more uniformly guided to the whole upstream surface of the filter 5, the clean air flow filtered by the filter 5 continuously passes through the mesh inner container 72 and then is sucked into the fan motor 6, the pressurized air flow flows to the air outlet along the first direction, and finally enters the nozzle to be sprayed outwards. In the whole process, the upper area of the tubular air filter screen 53 is mainly used for filtering the outside air from the first air inlet channel 31, the lower area of the tubular air filter screen 53 is mainly used for filtering the outside air from the second air inlet channel 32, and the middle area of the tubular air filter screen 53 can filter the outside air which is respectively from the first air inlet channel 31 and the second air inlet channel 32 and then diffused by the diffusion channel 33, so that the tubular air filter screen 53 can be used uniformly in three parts, the service life of the filter is greatly prolonged, and the frequency of replacing the filter is reduced.

Fig. 19 is an exploded view of a nozzle of the bladeless fan according to the present invention. FIG. 20 is a cross-sectional view of a nozzle in the bladeless fan of the present invention. Fig. 21 is a top view of the bladeless fan of the present invention. As shown in fig. 19 to 21, the nozzle 1 of the present invention includes a housing 11, two accessories 12, a heating device 13, a cable 14, a cover plate 15, a fifth ring seal 16, and a fixing member 17. The heating device 13 is provided to the attachment 12. The housing 11 is sealed to the fan motor 6 by a fifth annular seal 16, the fifth annular seal 16 preferably being a sponge. The purified pressurized air stream from the fan motor 6 can be further heated in the nozzle 1 and then ejected. Wherein each of the accessories 12 has an exhaust port 121 and a wind collecting chamber 122 in the inner passage 110 of the housing 11. Wind collecting cavity 122 and exhaust port 121 are both disposed on an accessory 12 detachably nested in housing 11, so as to facilitate manufacture, and are more favorable for disassembly and maintenance of heating device 13, disassembly and cleaning of wind collecting cavity 122 and exhaust port 121, and the like. The attachment 12 includes a mouth located at the front end and a casing of an air collecting cavity 122 connected to the rear end of the mouth, the air outlet 121 has a plurality of air collecting cavities distributed longitudinally in a row on the mouth, the air collecting cavity 122 is formed inside the casing 52 of the air collecting cavity 122, a longitudinal through opening for nesting the mouth is provided on the wall body of the housing 11, two longitudinal positioning grooves located at two sides of the inner end of the longitudinal through opening 25 are provided on the inner wall of the housing 11, and the two attachments 12 are respectively fixed in the longitudinal positioning grooves.

In this embodiment, the air collecting cavity 122 includes a first cavity 1221 and a second cavity 1222 connected to a terminal of the first cavity 1221, a region between the air inlet 124 of the air collecting cavity 122 and the second cavity 1222 constitutes the first cavity 1221, a region between the terminal of the first cavity 1221 and the air outlet of the air collecting cavity 122 constitutes the second cavity 1222, the heating device 13 is disposed in the first cavity 1221, and both the air flow passing through the heating device 13 and the air flow passing through the heat insulation passage 123 enter the second cavity 1222 and are conveyed from the air outlet of the air collecting cavity 122 to the air outlet 121. The air collecting cavity 122, the heating device 13 and the exhaust port 121 are all arranged on the basis of the same central plane, namely the longitudinal central plane H of the air collecting cavity 122 and the heating device 13 and the longitudinal central plane I of the exhaust port 121 are positioned on the same plane, so that air flow is heated by the heating device 13 and then is exhausted through the exhaust port 121 in a straight direction, turning and turning are not needed in the middle, heat loss of hot air flow in the output process can be avoided, and the heat efficiency of the fan is improved. Meanwhile, when cold air is blown, namely the temperature control switch is not started, the output efficiency of air flow can be improved, the air supply distance is prolonged, and the like. And, the shell 11 is based on the projection of the plane of the air inlet cover plate 2, and is located in the annular range of the air inlet cover plate 2, and the lifting stroke of the air inlet cover plate 2 in the first direction is not interfered, so that the air inlet cover plate 2 can be lifted out of the shell 3 or pressed into the shell 3 through the lifting stroke around the shell 11.

Fig. 22 to 27 are schematic views illustrating a flow state of replacing the filter net of the bladeless fan according to the present invention. As shown in fig. 22 to 27, when the filter 5 needs to be replaced, the filter 5 is taken out by rotating the intake cover 2 so that the latch 221 of the intake cover 2 is separated from the slot 73 of the inner case 7 and then lifting the outer case 3 along the lifting stroke of the outer case 11 around the nozzle 1 until the height of the nozzle 1 is exceeded. Then, the latch 224 of the intake cover 2 and the slot 56 of the filter 5 are separated, the used filter 5 is detached from the intake cover 2, and the unused air screen 5N is replaced, and then the latch 224 and the slot 56 are engaged. Finally, the intake flap 2 with the filter 5 is pressed into the housing 3 and locked in rotation, likewise along the lifting path of the housing 11 surrounding the nozzle 1. The bladeless fan provided by the invention has the advantages that only one part disassembly action is needed for replacing the filter screen, and only one filter screen replacement is needed, so that the workload and time for replacing the filter screen are greatly reduced, and the humanized experience is improved.

In summary, the present invention is directed to a bladeless fan for purifying air, which enables air to pass through a filter more uniformly, prolongs the service life of the filter, reduces the number of times of replacing the filter, reduces the cost of using the air purifier, is more beneficial to improving the indoor environment, and provides a cleaner living environment.

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 bladeless fan for purifying air, comprising:

a body (10) comprising a first air inlet (222), a second air inlet (36), an air outlet, and a fan motor (6) for generating an air flow through the body (10), the first air inlet (222), the second air inlet (36) being spaced apart in a first direction;

a nozzle (1) connected to the air outlet for receiving an air flow from a body (10) and emitting the air flow; and

a filter (5) disposed in the body (10) in a region between the first air inlet (222) and the second air inlet (36) downstream of the air inlets.

2. The bladeless fan for purifying air according to claim 1, wherein said body (10) comprises a casing (3), said first air inlet (222) and second air inlet (36) being formed at respective ends of said casing (3), at least part of said casing (3) forming a diffusion channel (33) for guiding said air flow into said filter (5).

3. The bladeless fan for purifying air according to claim 2, wherein the upstream surface of the filter (5) is exposed to the diffusion channel (33).

4. The bladeless fan for purifying air according to claim 2, wherein said first direction is a height direction of said body (10).

5. The bladeless fan for purifying air according to claim 2, wherein said casing (3) is a barrel-shaped housing, said filter (5) comprises a tubular air screen (53), said tubular air screen (53) is arranged at the inner circumference of said barrel-shaped housing, and the tubular gap between the upstream surface of said tubular air screen (53) and the inner wall of said barrel-shaped housing forms said diffusion channel (33).

6. An air purifying bladeless fan according to claim 5, wherein the body (10) further comprises a cover intake plate (2), the cover intake plate (2) being detachably connected to the opening of the barrel-shaped housing, at least one first air inlet (222) arranged around the tubular air screen (53) being provided along the edge of the cover intake plate (2), the first air inlet (222) communicating with the first end of the diffuser channel (33).

7. The bladeless fan for purifying air according to claim 6, wherein a circumferential positioning groove is formed on one side of the air inlet cover plate (2), the circumferential positioning groove is detachably engaged with a first side of the tubular air filter screen (53), and the first side of the tubular air filter screen (53) is sealed with the air inlet cover plate (2) through an annular sealing member.

8. The bladeless fan for purifying air according to claim 6, wherein the second side of the tubular air screen (53) abuts the bottom of the barrel-shaped housing, and the second side of the tubular air screen (53) is sealed with the outer casing (3) by an annular seal.

9. An air cleaning bladeless fan according to claim 6, characterized in that the bottom of the tub-shaped housing is provided at its edge with at least one second air inlet (36) arranged around the tubular air screen (53), said second air inlet (36) communicating with the second end of the diffuser channel (33).

10. The bladeless fan for purifying air according to claim 1, further comprising a base (4) having a rotation shaft and a motor for driving the rotation shaft, said rotation shaft supporting said body (10).