CN110778535B

CN110778535B - Bladeless fan for purifying air and filter screen replacement method thereof

Info

Publication number: CN110778535B
Application number: CN201911052418.6A
Authority: CN
Inventors: 应辉
Original assignee: Individual
Current assignee: Zhejiang Crossbow Brand Electric Appliance Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2023-08-25
Anticipated expiration: 2039-10-31
Also published as: CN110778535A

Abstract

The invention provides a bladeless fan for purifying air and a filter screen replacing method thereof, wherein the bladeless fan comprises: the air inlet cover plate is detachably connected to the opening of the barrel-shaped shell; the nozzle is connected with the air outlet and is used for receiving air flow from the body and emitting the air flow, and the air inlet cover plate is provided with a lifting stroke surrounding the nozzle; and a filter disposed in the body in a region between the first air inlet and the second air inlet, downstream of the air inlet, the filter being removably coupled to the intake cover. The invention can make air pass through the filter more uniformly, prolong the service life of the filter and reduce the frequency of replacing the filter.

Description

Bladeless fan for purifying air and filter screen replacement method thereof

Technical Field

The invention relates to the field of refrigeration equipment, in particular to a bladeless fan for purifying air and a filter screen replacement method thereof.

Background

With the continuous improvement of living and technological level, the requirements of people on living quality are increasingly improved, and indoor air quality becomes an important concern of people. Especially in recent years, haze and PM2.5 problems occur, and the demand of people for air purifiers is increasing.

The 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 durability and uncertainty of the release of contaminants from indoor air, the use of air cleaners to clean indoor air is an internationally recognized method of improving indoor air quality. There are a number of different technologies and mediums in an air purifier that enable it to provide clean and safe air to a user. Common air purification techniques are: low temperature asymmetric plasma air purification technology, adsorption technology, anion technology, negative oxygen ion technology, molecular complexing 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: photocatalyst, activated carbon, synthetic fiber, HEPA high-efficiency material, etc., the cost of the high-quality filter screen can be 20% to 30% of that of the high-quality filter screen.

Currently, there are more bladeless fans with air screens. Fig. 1 is a cross-sectional view of a bladeless fan with an air screen according to the prior art. 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 liner 97. Wherein, shell 93 with 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 the first air inlet of fan motor 96 in the mesh inner bag 97, and nozzle 91 sets up in shell 93 top, the air outlet intercommunication of fan motor 96 nozzle 91. Indoor air sequentially passes through meshes of the shell 93 and the filter screen 95, enters the mesh liner 97, is pressurized by the inner suction fan motor 96 and is sprayed out of the nozzle 91. In this structure, in order to maximize the total area of the air inlet mesh and the area of the filter screen, the air inlet mesh is maximally distributed on the whole height of the surface of the casing, and the filter screen with the same height as the air inlet mesh area is configured. The air inlet mesh of the housing 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 housing 93 closer to the area near the bottom of the housing 93 for air suction effect, the air of the lower air inlet mesh can almost linearly reach the first air inlet of the fan motor 96, the suction force obtained from short distance is larger, the air of the upper air inlet mesh needs to pass through a longer route to reach the first air inlet, the suction force obtained from long distance is obviously reduced, the suction force of the fan motor 96 is obviously different for the air from the air inlet mesh at high distance, the suction amount of the air inlet mesh closer to the bottom of the housing 93 is obviously larger than the suction amount of the air inlet mesh far away from the bottom of the housing 93, the difference is 2.5 times to 3 times, the difference of the filter screen in the corresponding area is obvious, in use degree, in a simple way, after a period of use, the lower filter screen 95 near the bottom of the housing 93 becomes a filter screen part 95B which is used seriously, the upper filter screen 95 far away from the bottom of the housing 93 becomes a filter screen part 95A used slightly, the filter screen part B which is used seriously, the main filter screen part B filtered mainly is used seriously, the filter screen 95 is used is not wasted, the filter screen 95 is greatly is not used, and the filter screen 95 is fully used is not needed, and the situation is fully has been wasted, and the service life is not needed is greatly is shortened.

The shell of the bladeless fan is of a structure that two shells are horizontally combined, and a filter screen is arranged in each shell. The filter screen 95 seals between the mesh liner 97 and the stereo sealing rubber strip arranged at the downstream, the cost of the stereo sealing rubber strip is extremely high, and the sealing effect is poor after long-time use. And when changing filter screen 95, just need to tear down respectively two casings and change the filter screen respectively and install again, the process is loaded down with trivial details, and humanized experience is relatively poor.

Therefore, the invention provides a bladeless fan for purifying air and a filter screen replacing method thereof.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide the bladeless fan for purifying air and the filter screen replacement method thereof, which overcome the defects of the prior art, ensure that the air can more uniformly pass through the filter, prolong the service life of the filter, reduce the frequency of replacing the filter, reduce the use cost of the air purifier, are more beneficial to the improvement of indoor environment and provide cleaner living environment.

Embodiments of the present invention provide a bladeless fan for purifying air, comprising

The air inlet cover plate is detachably connected to the opening of the barrel-shaped shell;

a nozzle connected with the air outlet and used for receiving air flow from the body and emitting the air flow, wherein the air inlet cover plate is provided with a lifting stroke surrounding the nozzle; and

a filter disposed in the body in an area between the first air inlet and the second air inlet downstream of the air inlet, the filter being removably connected to the intake cover.

Preferably, the nozzle is located inside the annular range of the air inlet cover plate based on the projection of the plane where the air inlet cover plate is located, and is not overlapped with the lifting travel of the air inlet cover plate in the first direction, and the first direction is the height direction of the body.

Preferably, a plurality of inserting buckles extending in the circumferential direction are arranged on the inner periphery of the air inlet cover plate, and a plurality of inserting grooves which provide circumferential rotation sliding channels and are detachably buckled with the inserting buckles are arranged on the inner shell.

Preferably, the first air inlet and the second air inlet are respectively formed at two ends of the housing, at least part of the housing forms a diffusion channel for guiding the air flow into a filter, and an upstream surface of the filter is exposed to the diffusion channel.

Preferably, the filter comprises a tubular air screen disposed between the inner periphery of the barrel housing and the outer periphery of the inner shell, and a tubular gap between an upstream surface of the tubular air screen and the inner wall of the barrel housing forms the diffusion channel.

Preferably, at least one first air inlet arranged around the tubular air filter screen is arranged along the edge of the air inlet cover plate, and the first air inlet is communicated with the first end of the diffusion channel.

Preferably, one side of the air inlet cover plate is provided with a circumferential positioning groove, the circumferential positioning groove is detachably clamped with the first side of the tubular air filter screen, and the first side of the tubular air filter screen is sealed with the air inlet cover plate through an annular sealing piece.

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

Preferably, at least one second air inlet arranged around the tubular air filter screen is arranged at the edge of the bottom of the barrel-shaped shell, and the second air inlet is communicated with the second end of the diffusion channel.

The embodiment of the invention also provides a filter screen replacement method of the bladeless fan for purifying air, which adopts the bladeless fan for purifying air and comprises the following steps of:

unlocking the air inlet cover plate through rotation, so that the air inlet cover plate is separated from the inner shell;

lifting the intake cover plate with the filter attached thereto along a lifting stroke of the housing around the nozzle until the height of the nozzle is exceeded;

removing the filter to be replaced from the air inlet cover plate, and replacing the filter with an unused filter;

the intake cover with unused filters is pressed into the housing and rotationally locked along the lifting stroke of the housing around the nozzle.

The bladeless fan for purifying air and the filter screen replacement method thereof can enable air to pass through the filter more uniformly, prolong the service life of the filter, reduce the frequency of replacing the filter, reduce the use cost of the air purifier, be more beneficial to the improvement of indoor environment and provide cleaner living environment.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.

Fig. 1 is a cross-sectional view of a bladeless fan with an air screen according to the prior art.

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 inlet cover plate, filter screen and housing of the bladeless fan of the present invention.

Fig. 5 is a schematic diagram showing the combination state of the air inlet cover plate and the filter screen in the bladeless fan.

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

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

Fig. 8 is a schematic diagram showing an exploded state of an air inlet cover plate and a filter screen in the bladeless fan.

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

Fig. 10 is a schematic diagram showing an exploded state of a fan motor and an inner case in a bladeless fan according to the present invention.

Fig. 11 is a schematic view of a combined state of the drainage cover and the connection housing in the bladeless fan according to the present invention.

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

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

Fig. 14 is a schematic diagram showing a second view angle of the combination state of the drainage cover and the connection housing in the bladeless fan according to the present invention.

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

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

FIG. 17 is a schematic view of the cooperation of the base and the housing in the bladeless fan of the present invention.

Fig. 18 is a schematic diagram of the duct of the bladeless fan of the present invention.

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

Fig. 20 is a schematic cross-sectional view of a nozzle in a bladeless fan according to the present invention.

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

Fig. 22 to 27 are schematic views showing a process of replacing a filter screen by a bladeless fan according to the present invention.

Reference numerals

1. Nozzle 5 air filter screen

11. First annular seal of housing 51

110. First annular location of internal passage 52

12. Accessory 53 tubular air filter screen

121. Second annular positioning piece of exhaust port 54

122. Second annular seal of air collection chamber 55

1221. First cavity 56 slot

1222. Unused air filter screen of second cavity 5N

123. Heat insulation channel 6 fan motor

124. Air inlet 61 drainage cover

13. Heating device 611 spoiler

14. Cable 612 drainage sheet

15. Cover plate 613 flow guiding piece

16. Fifth annular seal 62 upper cover

17. Fixing member 63 motor

10. Cover in body 64

2. Impeller with air inlet cover plate 65

21. Impeller cover of cover plate 66

211. First positioning column 67 positioning piece

22. Fourth annular seal of air screen mount 68

221. Suction inlet of eye-splice 69

222. First air inlet 7 inner shell

223. Positioning hole 71 is connected with the shell

224. Buckle 72 mesh liner

225. Circumferential positioning groove 73 slot

23. Third annular seal 91 nozzle

3. Outer casing 93 outer casing

31. First air inlet channel 94 base

32. Second air inlet channel 95 filter screen

33. Diffusion channel 95A lightly used screen portion

34. First opening 95B heavily used screen portion

35. Second opening 96 fan motor

36. Second air inlet 97 mesh inner container

4. Base seat

41. Support member

411. Sinking shoulder

412. Edge of the frame

413. Supporting disk

42. Outer casing

43. Bottom plate

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments may 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 the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof 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 along a first direction, which is a height direction of the body 10, i.e., a straight line direction defined by reference numeral A, B in the drawing. In the present embodiment, the first direction is also the direction of the rotation axis of the rotating body 10 of the base 4 and the direction of the air flow guided by the fan motor 6, but is not limited thereto. The nozzle 1 is connected to an air outlet for receiving an air flow from the body 10 and emitting the air flow. The filter 5 is arranged 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 driving the rotation shaft, and the rotation shaft supports the body 10. In this embodiment, the body 10 includes a housing 3, and a first air inlet 222 and a second air inlet 36 are formed at both ends of the housing 3, respectively, at least a portion of the housing 3 forming a diffusion channel 33 that directs an 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 housing 3 is a barrel-shaped casing, the filter 5 includes a tubular air filter screen 53, the tubular air filter screen 53 is disposed at an inner periphery of the barrel-shaped casing, and a tubular gap between an upstream surface of the tubular air filter screen 53 and an inner wall of the barrel-shaped casing forms the diffusion passage 33. The upstream surface of the filter 5 is exposed to the diffusion channel 33 so as to more uniformly guide the air flow to the upstream surface of the filter 5. In this embodiment, the body 10 further includes an air inlet cover 2, the air inlet cover 2 is detachably connected to the opening of the barrel-shaped casing, and at least one first air inlet 222 arranged around the tubular air filter 53 is disposed along the edge of the air inlet cover 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 provided around the tubular air screen 53 at the rim of the bottom of the barrel housing, the second air inlet 36 communicating with the second end of the diffuser channel 33. In this embodiment, the annular upper and lower end surfaces of the tubular air filter 53 are respectively sealed with the air inlet cover plate and the bottom of the barrel-shaped casing by annular sealing members. The air inlet on the shell of the bladeless fan for purifying air is not arranged on 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 shell, so that the filter 5 can be used in a very uniform manner, 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 inlet cover plate, filter screen and housing of the bladeless fan of the present invention. Fig. 5 is a schematic diagram showing the combination state of the air inlet cover plate and the filter screen in the bladeless fan. Fig. 6 is a cross-sectional view of fig. 5. Fig. 7 is a bottom view of fig. 5. Fig. 8 is a schematic diagram showing an exploded state of an air inlet cover plate and a filter screen in the bladeless fan. Fig. 9 is a cross-sectional view of fig. 8. As shown in fig. 4 to 9, the air inlet cover plate 2 of the present invention includes an annular cover plate member 21 and an annular air filter screen fixing member 22, and a plurality of first positioning posts 211 are provided on a first side of the cover plate member 21. 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 columns 211 to realize connection with the air screen fixing member 22. The inner periphery of the air screen holder 22 is provided with circumferentially extending tabs 221 connected to the inner housing 7. The outer periphery of the air screen holder 22 is provided with a plurality of circumferentially arranged first air inlets 222. The second side of the air filter screen fixing member 22 is provided with a circumferential positioning groove 225 at the outer periphery, the circumferential positioning groove 225 is detachably clamped with the first side of the tubular air filter screen 53, and the space between the first side of the tubular air filter screen 53 and the air inlet cover plate 2 is sealed by an annular sealing member. The outer periphery of the air screen holder 22 is also provided with a catch 224 cooperating with the filter 5. The air screen holder 22 is sealed to the inner housing 7 by a third annular seal 23, the third annular seal 23 preferably being a sealing ring, but not limited thereto.

With continued reference to fig. 4 to 9, the filter 5 of the present invention comprises a tubular air filter screen 53, a first side of the tubular air filter screen 53 is provided with a first annular positioning member 52 for fixing the first annular sealing member 51, an inserting slot 56 is provided on the periphery of the first side, and the inserting slot 56 of the filter 5 is detachably engaged with the buckle 224 of the air inlet cover plate 2. The second side is provided with a second annular positioning member 54 which secures a second annular sealing member 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 annular seal 51 and the second annular seal 55 is preferably a slow rebound sponge. The medium of the tubular air filter 53 may be, but not limited to, an existing air filter material or an air filter material of future inventions.

Fig. 10 is a schematic diagram showing an exploded state of a fan motor and an inner case in a bladeless fan according to the present invention. Fig. 11 is a schematic view of a combined state of the drainage cover and the connection housing in the bladeless fan according to the present invention. Fig. 12 is a bottom view of fig. 11. Fig. 13 is a top view of fig. 11. Fig. 14 is a schematic diagram showing a second view angle of the combination state of the drainage cover and the connection housing in the bladeless fan according to the present invention. As shown in fig. 10 to 14, the inner case 7 of the present invention includes a connection housing 71 and a mesh inner container 72, a first side of the connection housing 71 is engaged with one side of the mesh inner container 72, the fan motor 6 is fixed in the connection housing 71, and the fan motor 6 includes a drain 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 sealing member 68, and a suction inlet 69, which are assembled in this order in a first direction. The motor 63 drives the impeller 65 to rotate, and after air flow is guided from the mesh liner 72 through the air suction inlet 69 to enter the fan motor 6, the pressurized air flow flows to the air outlet through the flow guiding cover 61 along the first direction, and finally enters the nozzle to be sprayed outwards. The fan motor 6 is sealed to the mesh liner 72 by a fourth annular seal 68, the fourth annular seal 68 preferably being a sponge. The second side of the connection housing 71 is provided with a slot 73 for providing a circumferential sliding-in passage detachably engaged with the eye-splice 221.

Wherein, the air outlet sets up in the drainage cover 61, the guide wall interval of the one side of drainage cover 61 towards impeller 65 is equipped with a plurality of air current that prevent the air flow and goes out the spoiler 611 that forms the detour at the air outlet, and the guide piece 612 that the guide air flow direction air outlet flows, the plane that guide piece 612 is located is on a parallel with first direction, a plurality of guide pieces 612 go out and meet at the air outlet and form a guide piece 613, guide piece 613 includes the multiaspect and extends the drainage wall that forms by guide piece 612, the plane that the drainage wall is located is all on a parallel with first direction, the intensity of the air current of fan motor 6 has been strengthened, and the noise in the air current guiding process has been reduced.

Fig. 15 is an exploded view of the base of the bladeless fan of the present invention. Fig. 16 is a perspective view of a support member in the bladeless fan of the present invention. As shown in fig. 15 to 16, the bladeless fan according to the present invention includes a support member 41, a housing 42, a rotating electric machine, a bottom plate 43, and the like. Wherein, the support disc 413 in the center of the support 41 supports the bottom of the barrel-shaped housing, and the rim 412 lower than the support disc 413 is provided around the support disc 413, and the support disc 413 and the rim 412 are excessively connected through the sinking shoulder 411. An escape space 414 is formed in the outer circumference of the support plate 413 by the sinking shoulder 411.

FIG. 17 is a schematic view of the cooperation of the base and the housing in the bladeless fan of the present invention. As shown in fig. 17, a boss protruding downwards is arranged at the circumference of the bottom of the barrel-shaped shell, and a plurality of first openings 34 are arranged at the end surface of the boss, facing the base 4, in a diffusing manner from the center of the barrel-shaped shell to the periphery, and the first openings 34 are communicated with the diffusing channels 33. The inner side surface of the center of the barrel-shaped shell facing the boss 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 plate 413 so as to increase the air flow rate of the second air inlet channel 32 and allow more air flow to enter the diffusion channel 33 on the premise of constant height.

In a preferred embodiment, the first openings 34 are in one-to-one correspondence with the second openings 35, and each of the first openings 34 is in communication combination with the second openings 35 to form a three-dimensional air intake. In this embodiment, the three-dimensional air inlet is based on a first plane (corresponding to a horizontal plane) which is a plane perpendicular to the axis of the rotation shaft of the base 4, forming a first projection area; the three-dimensional air intake port has a second projected area formed on a second plane (corresponding to one type of 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 based on a horizontal plane opening and a second opening 35 based on a vertical plane opening, where an inner end of the first opening 34 is communicated 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 diagram of the duct of the bladeless fan of the present invention. As shown in fig. 18, the cover member 21 has an arc-shaped air guiding edge, the housing 3 has an annular edge protruding from the air filter screen fixing member 22, and the arc-shaped air guiding edge cooperates with the annular edge to form a first annular air guiding slit for guiding the air flow into the first air inlet 222, the opening direction of the first end of the first annular air guiding slit is perpendicular to the first direction, and the opening direction of the first annular air guiding slit communicating with the second end of the first air inlet 222 is parallel to the first direction. In the present embodiment, the first annular air guide slit is used as the first air inlet channel 31 to realize the air inlet function at the upper end of the housing 3, but not limited thereto. The base 4 and the bottom of the shell 3 cooperate to form a second annular air guide slit for guiding 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 communicating avoidance space of the second annular air guide slit is parallel to the first direction, so that air is prevented from being directly sucked from the ground, dust entering the bladeless fan is reduced, and the avoidance space 414 is arranged to enable part of dust to be deposited at the bottom of the avoidance space 414, so that a space for depositing dust is further provided. The first opening 34 and the second opening 35 are exposed in the escape space 414. In the present embodiment, the second annular air guiding slit is used as the second air inlet channel 32 to realize the air inlet function at the lower end of the housing 3, but not limited thereto.

When the bladeless fan of the invention works, the fan motor 6 rotates to suck air flow, the air flow around the bladeless fan is guided to enter the diffusion channel 33 between the shell 3 and the tubular air filter screen 53 respectively from the first air inlet channel 31 which is arranged at the upper end of the shell 3 and the second air inlet channel 32 which is arranged at the lower end of the shell, the air flow is more uniformly guided to the whole upstream surface of the filter 5 due to the diffusion of the air flow in the diffusion channel 33, clean air flow filtered by the filter 5 continues to pass through the mesh liner 72 and then is sucked into the fan motor 6, the air flow after being pressurized flows to the air outlet along the first direction, and finally the air flow 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 external air from the first air inlet channel 31, the lower area of the tubular air filter screen 53 is mainly used for filtering the external air from the second air inlet channel 32, and the middle area of the tubular air filter screen 53 can filter the external air which is respectively diffused through the diffusion channel 33 after coming from the first air inlet channel 31 and the second air inlet channel 32, so that three parts of the tubular air filter screen 53 can be used in a very uniform manner, the service life of the filter is greatly prolonged, and the frequency of replacing the filter is reduced.

Fig. 19 is a schematic view showing an exploded state of the nozzle in the bladeless fan according to the present invention. Fig. 20 is a schematic cross-sectional view of a nozzle in a bladeless fan according to 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 in the present invention includes a housing 11, two accessories 12, a heating device 13, a cable 14, a cover plate 15, a fifth annular seal 16, and a fixing member 17. The heating device 13 is provided to the accessory 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 cleaned and pressurized air stream from the fan motor 6 may be further heated in the nozzle 1 and then ejected. Wherein each accessory 12 has a vent 121 and a plenum 122 within the interior passage 110 of the housing 11. The wind collecting cavity 122 and the exhaust port 121 are arranged on the accessory 12 which is detachably nested on the shell 11, so that the manufacture is convenient, and the disassembly and the maintenance of the heating device 13, the disassembly and the cleaning of the wind collecting cavity 122 and the exhaust port 121 and the like are facilitated. The accessory 12 comprises a mouth at the front end and a wind collecting cavity 122 shell connected with the rear end of the mouth, the exhaust port 121 is provided with a plurality of wind collecting cavities 122 which are longitudinally distributed on the mouth in a row, a wind collecting cavity 122 is formed in the wind collecting cavity 122 shell 52, a longitudinal through opening for nesting the mouth is formed in the wall of the shell 11, two longitudinal positioning grooves which are positioned at two sides of the inner end of the longitudinal through opening 25 are formed in the inner wall of the shell 11, and the two accessories 12 are respectively fixed in the longitudinal positioning grooves.

In this embodiment, the wind collecting chamber 122 includes a first chamber 1221 and a second chamber 1222 connected to the end of the first chamber 1221, the area between the wind inlet 124 of the wind collecting chamber 122 and the second chamber 1222 forms the first chamber 1221, the area between the end of the first chamber 1221 and the wind outlet of the wind collecting chamber 122 forms the second chamber 1222, the heating device 13 is disposed in the first chamber 1221, and the air flow passing through the heating device 13 and the air flow passing through the heat insulation channel 123 both enter the second chamber 1222 and are conveyed from the wind outlet of the wind collecting chamber 122 to the air outlet 121. The air collecting cavity 122, the heating device 13 and the exhaust port 121 are all arranged based on the same central plane, namely, the longitudinal central plane H of the air collecting cavity 122 and the heating device 13 is on the same plane with the longitudinal central plane I of the exhaust port 121, so that the air flow is discharged through the exhaust port 121 in a straight direction after being heated by the heating device 13, and no turning and turning are generated in the middle, thereby avoiding heat loss of the hot air flow in the output process and further improving the heat efficiency of the fan. Meanwhile, when cold air is blown, namely, when the temperature control switch is not turned on, the output efficiency of air flow can be improved, the air supply distance is prolonged, and the like. Moreover, the housing 11 is located inside the annular range of the air inlet cover plate 2 based on the projection of the plane where the air inlet cover plate 2 is located, the lifting stroke of the air inlet cover plate 2 in the first direction is not interfered, and it is ensured that the air inlet cover plate 2 can be lifted out of the housing 3 or pressed into the housing 3 through the lifting stroke surrounding the housing 11.

Fig. 22 to 27 are schematic views showing a process of replacing a filter screen by a bladeless fan according to the present invention. As shown in fig. 22 to 27, when the filter 5 needs to be replaced, by rotating the intake cover plate 2, the eye-splice 221 of the intake cover plate 2 is separated from the slot 73 of the inner case 7, and then the outer case 3 is lifted up and down along the lifting stroke of the outer case 11 around the nozzle 1 until exceeding the height of the nozzle 1, taking out the filter 5. Then, the buckle 224 of the air inlet cover plate 2 is separated from the slot 56 of the filter 5, the used filter 5 is detached from the air inlet cover plate 2, and the buckle 224 is engaged with the slot 56 after the unused air filter screen 5N is replaced. Finally, the air inlet cover plate 2 with the filter 5 is pressed into the housing 3 along the lifting stroke of the shell 11 surrounding the nozzle 1 and is locked in rotation. According to the bladeless fan filter screen replacement method, the filter screen is replaced only by one component disassembling action, and the filter screen is replaced only once, so that the workload and time for replacing the filter screen are greatly reduced, and the humanized experience is improved.

In summary, the invention aims to provide a bladeless fan for purifying air, which can enable the air to more uniformly pass through a filter, prolong the service life of the filter, reduce the frequency of replacing the filter, reduce the use cost of an air purifier, be more beneficial to the improvement of indoor environment and provide cleaner living environment.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. A bladeless fan for purifying air, comprising:

the air inlet cover plate (2) is detachably connected to an opening of the barrel-shaped shell;

a nozzle (1) connected to the air outlet for receiving an air flow from the body (10) and emitting said air flow, the intake cover (2) having a lifting travel around the nozzle (1); and

the filter (5) is arranged in the body (10) in a region between the first air inlet (222) and the second air inlet (36), is positioned at the downstream of the air inlets, the filter (5) is detachably connected to the air inlet cover plate (2), the nozzle (1) is positioned in the annular range of the air inlet cover plate (2) based on the projection of the plane of the air inlet cover plate (2), the nozzle is not overlapped with the lifting stroke of the air inlet cover plate (2) in the first direction, the first direction is the height direction of the body (10), the first air inlet (222) and the second air inlet (36) are respectively formed at two ends of the shell (3), at least part of the shell (3) forms a diffusion channel (33) for guiding the air flow to enter the filter (5), and the upstream surface of the filter (5) is exposed out of the diffusion channel (33).

2. The bladeless fan for purifying air according to claim 1, characterized in that the inner periphery of the air intake cover plate (2) is provided with a plurality of circumferentially extending buckles (221), and the inner shell (7) is provided with a plurality of slots (73) which provide circumferential rotary sliding channels and are detachably buckled with the buckles (221).

3. The bladeless fan for purifying air according to claim 1, characterized in that the filter (5) comprises a tubular air screen (53), the tubular air screen (53) being arranged between the inner periphery of the barrel casing and the outer periphery of the inner casing (7), and a tubular gap between the upstream surface of the tubular air screen (53) and the inner wall of the barrel casing forming the diffusion channel (33).

4. A bladeless fan for purifying air according to claim 3, characterized in that at least one first air inlet (222) arranged around the tubular air screen (53) is provided along the edge of the air intake cover (2), said first air inlet (222) being in communication with the first end of the diffusing channel (33).

5. The bladeless fan for purifying air according to claim 4, wherein one side of the air inlet cover plate (2) is provided with a circumferential positioning groove, the circumferential positioning groove is detachably clamped with the first side of the tubular air filter screen (53), and the space between the first side of the tubular air filter screen (53) and the air inlet cover plate (2) is sealed by an annular sealing element.

6. The bladeless fan for purifying air according to claim 5, characterized in that the second side of the tubular air screen (53) abuts the bottom of the barrel-shaped casing, the second side of the tubular air screen (53) being sealed with the casing (3) by an annular seal.

7. A bladeless fan for purifying air according to claim 4, characterized in that the rim of the bottom of the barrel casing is provided with at least one second air inlet (36) arranged around the tubular air screen (53), said second air inlet (36) being in communication with the second end of the diffusing channel (33).

8. A method for replacing a filter screen of a bladeless fan for purifying air, characterized in that the bladeless fan for purifying air according to any one of claims 1 to 7 is used, comprising the steps of: