WO2021083292A1

WO2021083292A1 - Fan and filter screen changing method therefor

Info

Publication number: WO2021083292A1
Application number: PCT/CN2020/124913
Authority: WO
Inventors: 应辉
Original assignee: 应辉
Priority date: 2019-10-31
Filing date: 2020-10-29
Publication date: 2021-05-06

Abstract

A fan, comprising: a body part (10), the body part (10) comprising an outer housing (3), an inner housing (7) arranged inside the outer housing (3), an air intake cover panel (2), a first air intake (222), a second air intake (36), an air outlet, and a fan motor (6) used to generate an airflow that passes through the body part (10). The first air intake (222) and the second air intake (36) are arranged at an interval along a first direction, the outer housing (3) is a cylindrical housing, and the air intake cover panel (2) is detachably connected to an opening of the cylindrical housing. The fan further comprises: a nozzle (1), connected to the air outlet and used to receive the air flow from the body part (10) and reemit the airflow, the air intake cover panel (2) having a rising and falling path around the nozzle (1); and a filter (5), arranged in a region between the first air intake (222) and the second air intake (36) in the body part (10) and located downstream of the air intakes. The filter (5) is detachably connected to the air intake cover panel (2). Further provided in the present invention is a filter screen changing method for such a fan. The present fan is able to cause air to pass uniformly through a filter, extending the service life of the filter, and reducing the number of times the filter is changed.

Description

Fan and its filter replacement method

Technical field

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

Background technique

With the continuous improvement of the standard of living and science and technology, the people's requirements for the quality of life are increasing day by day, and indoor air quality has become an important issue of people's concern. Especially with the emergence of smog and PM2.5 in recent years, people's demand for air purifiers is also increasing.

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

At present, there have been many bladeless fans with air filters. Fig. 1 is a cross-sectional view of a bladeless fan with an air filter in the prior art. As shown in FIG. 1, most of them have a large nozzle 91, a housing 93, a base 94, a filter 95, a fan motor 96 and a mesh inner liner 97. Among them, the housing 93 with the air inlet mesh is provided on the base 94, the housing 93 is provided with a filter 95, the filter 95 is provided with a mesh inner liner 97, and the mesh inner liner 97 is provided with the first fan motor 96 An air inlet, the nozzle 91 is arranged above the housing 93, and the air outlet of the fan motor 96 communicates with the nozzle 91. The indoor air is filtered by the mesh of the casing 93 and the filter 95 in sequence, and then enters the mesh inner liner 97, is sucked into the fan motor 96 and is pressurized and ejected from 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 meshes are distributed at the full height of the shell surface, and a filter screen of the same height as the air inlet mesh area is configured. The air inlet mesh of the casing and the filter 95 are arranged in substantially the same section along the height direction, but because the first air inlet of the fan motor 96 is usually arranged in the casing 93 closer to the bottom of the casing 93 for the suction effect, The air in the lower air inlet mesh can almost reach the first air inlet of the fan motor 96 in a straight line. The shorter the distance, the greater the suction power. The air in the upper air inlet mesh needs to travel a longer route to reach the first air inlet. The suction power obtained by far is significantly smaller. In this case, the suction power of the fan motor 96 is significantly different from the air from the air inlet mesh of different heights. The air intake of the air inlet mesh closer to the bottom of the housing 93 will be significantly larger than the far away The air intake of the air inlet mesh at the bottom of the casing 93 varies from 2.5 to 3 times, which makes the difference in the degree of use of the filter in the corresponding area obvious. In short, after a period of use, the lower filter 95 near the bottom of the casing 93 becomes In addition to the heavily used filter part 95B, the upper filter 95 far away from the bottom of the housing 93 becomes the lightly used filter part 95A, but at this time because the filter part 95B that mainly filters the air has been used in severe cases, it must Replacement, this structure greatly shortens the service life of the filter 95, and will cause many filters to be discarded without being fully used, resulting in a waste of resources.

Moreover, the shell of this type of bladeless fan is a structure in which two shells are aligned horizontally, and each shell is provided with a filter screen. The filter screen 95 is sealed between the three-dimensional sealing strips arranged downstream and the mesh inner liner 97. The three-dimensional sealing strips are extremely expensive, and the sealing effect is poor after long-term use. Moreover, when replacing the filter screen 95, it is necessary to disassemble the two shells and replace the filter screens respectively and then install them back. The process is cumbersome and the user-friendly experience is poor.

Summary of the invention

In view of the problems in the prior art, the purpose of the present invention is to provide a bladeless fan for purifying air and a filter replacement method thereof, which overcomes the prior art, enables the air to pass through the filter more uniformly, and prolongs the use of the filter. Life, reducing the number of times to replace the filter, reducing the use cost of the air purifier, is more conducive to the improvement of the indoor environment, to provide a cleaner living environment.

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

The body includes an outer shell, an inner shell arranged in the outer shell, an air intake cover plate, a first air inlet, a second air inlet, an air outlet, and a fan motor for generating air flow through the body, the first The air inlet and the second air inlet are arranged at intervals along the first direction, the housing is a barrel-shaped shell, and the air inlet cover is detachably connected to the opening of the barrel-shaped shell;

A nozzle connected to the air outlet for receiving the air flow from the body and emitting the air flow, the air inlet cover has a lifting stroke surrounding the nozzle; and

The filter is arranged in the area between the first air inlet and the second air inlet in the body, and is located downstream of the air inlet, and the filter is detachably connected to the air inlet cover.

In some embodiments, the nozzle is based on the projection of the plane where the air intake cover is located, and is located inside the annular range of the air intake cover, and is different from the lifting stroke of the air intake cover in the first direction. Overlapping, the first direction is the height direction of the body.

In some embodiments, the inner periphery of the air intake cover is provided with a plurality of buckles extending in the circumferential direction, and the inner shell is provided with a plurality of sliding passages that provide circumferential rotation and can be detachable from the buckles. Snapped slot.

In some embodiments, the first air inlet and the second air inlet are respectively formed at both ends of the housing, and at least part of the housing forms a diffusion channel that guides the air flow into the filter. The upstream surface is exposed to the diffusion channel.

In some embodiments, the filter includes a tubular air filter, the tubular air filter is arranged between the inner circumference of the barrel-shaped shell and the outer circumference of the inner shell, and the tubular air filter A tubular gap between the upstream surface and the inner wall of the barrel-shaped casing forms the diffusion channel.

In some embodiments, at least one first air inlet arranged around the tubular air filter is arranged along the edge of the air inlet cover, and the first air inlet communicates with the first end of the diffusion channel.

In some embodiments, a circumferential positioning groove is provided on one side of the air intake cover, and the circumferential positioning groove is detachably engaged with the first side of the tubular air filter. A ring seal is sealed between the first side and the air inlet cover plate.

In some embodiments, the second side of the tubular air filter abuts against the bottom of the barrel-shaped housing, and the second side of the tubular air filter and the housing are sealed by an annular seal.

In some embodiments, the bottom edge of the barrel-shaped shell is provided with at least one second air inlet arranged around the tubular air filter, and the second air inlet communicates with the second end of the diffusion channel.

An embodiment of the present invention also provides a method for replacing a filter screen of a bladeless fan that purifies air. The use of the above-mentioned bladeless fan for air purification includes the following steps:

Unlocking the air inlet cover by rotating, so that the air inlet cover is separated from the inner shell;

Lifting the air inlet cover plate connected with the filter to be replaced to the casing along the lifting stroke of the casing surrounding the nozzle until it exceeds the height of the nozzle;

Remove the filter to be replaced from the air inlet cover and replace it with an unused filter;

The air intake cover with the unused filter is pressed into the housing along the lifting stroke of the housing surrounding the nozzle and locked by rotation.

The bladeless fan for purifying air and the filter replacement method of the present invention can make the air pass through the filter more evenly, prolong the service life of the filter, reduce the number of times of filter replacement, and reduce the use cost of the air purifier , Which is more conducive to the improvement of the indoor environment and provides a cleaner living environment.

Description of the drawings

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

Fig. 1 is a cross-sectional view of a bladeless fan with an air filter in the prior art.

Fig. 2 is a schematic diagram of a bladeless fan according to an embodiment of the present invention.

Fig. 3 is a perspective view of a bladeless fan according to an embodiment of the present invention.

Fig. 4 is an exploded schematic diagram of the air inlet cover, the filter screen and the casing of the bladeless fan according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of the combined state of the air inlet cover and the filter in the bladeless fan according to an embodiment 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 a schematic diagram of an exploded state of the air inlet cover and the filter in the bladeless fan according to an embodiment of the present invention.

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

FIG. 10 is a schematic diagram of an exploded state of the fan motor and the inner casing of the bladeless fan according to an embodiment of the present invention.

FIG. 11 is a schematic view from a first perspective of the combined state of the suction cover and the connecting housing in a bladeless fan according to an embodiment of 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 view of the combined state of the suction cover and the connecting housing in a bladeless fan according to an embodiment of the present invention from a second perspective.

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

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

FIG. 17 is a schematic diagram of the cooperation of the base and the casing in a bladeless fan according to an embodiment of the present invention.

Fig. 18 is a schematic diagram of an air duct of a bladeless fan according to an embodiment of the present invention.

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

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

Fig. 21 is a top view of a bladeless fan according to an embodiment of the present invention.

FIGS. 22-27 are schematic diagrams of the process of replacing the filter screen of a bladeless fan according to an embodiment of the present invention.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms, and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be comprehensive and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the figures indicate the same or similar structures, and thus their repeated description will be omitted.

Fig. 2 is a schematic diagram of the bladeless fan of the present invention. Fig. 3 is a perspective view of the bladeless fan of the present invention. As shown in FIGS. 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 air flow through the body 10. The first air inlet 222 and the second air inlet 36 are along the first direction. It is arranged at intervals, and the first direction is the height direction of the body 10, that is, the linear direction defined by the signs A and B in the figure. In this embodiment, the first direction is also the direction of the rotation axis of the rotating body 10 of the base 4 and the direction in which the fan motor 6 guides the air flow, but it is not limited to this. The nozzle 1 is connected to an air outlet for receiving the air flow from the body 10 and emitting the air flow. The filter 5 is arranged in the area between the first air inlet 222 and the second air inlet 36 in the body 10, and is located downstream of the air inlet. The base 4 has a rotating shaft and a motor for driving the rotating shaft, and the rotating shaft supports the body 10. In this embodiment, the body 10 includes a housing 3, a first air inlet 222 and a second air inlet 36 are respectively formed at two ends of the housing 3, and at least part of the housing 3 forms a diffusion channel 33 for guiding air flow into the filter 5. In this embodiment, the diffusion channel 33 is a tubular space, and the axial direction of the tubular space is parallel to the first direction, but it is not limited to this. The housing 3 is a barrel-shaped shell, and the filter 5 includes a tubular air filter 53 which is arranged on the inner circumference of the barrel-shaped shell, and the upstream surface of the tubular air filter 53 is connected to the upper surface of the barrel-shaped shell. The tubular gap between the inner walls forms a diffusion channel 33. The upstream surface of the filter 5 is exposed to the diffusion channel 33 in order to guide the air flow to the upstream surface of the filter 5 more uniformly. In this embodiment, the body 10 also includes an air inlet cover 2. The air inlet cover 2 is detachably connected to the opening of the barrel-shaped shell, and at least one surrounding tubular air filter is arranged along the edge of the air inlet cover 2. The first air inlets 222 arranged in 53 are connected to the first end of the diffusion channel 33. At least one second air inlet 36 arranged around the tubular air filter 53 is arranged on the edge of the bottom of the barrel-shaped shell, and the second air inlet 36 communicates with the second end of the diffusion 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 shell through an annular sealing member. The air inlet on the shell of the bladeless fan for purifying air of the present invention is not directly facing the suction port of the fan motor, and the air flow is more evenly guided to the entire upstream surface of the filter 5 through the diffusion channel formed by the shell, so that the filter 5 It can be used very uniformly, which greatly extends the service life of the filter and reduces the number of times to replace the filter.

Fig. 4 is an exploded schematic diagram of the air inlet cover, the filter screen and the casing of the bladeless fan of the present invention. Figure 5 is a schematic diagram of the combined state of the air inlet cover and the filter 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 a schematic diagram of the exploded state of the air inlet cover and the filter in the bladeless fan of the present invention. Fig. 9 is a cross-sectional view of Fig. 8. As shown in Figures 4 to 9, the air intake cover 2 of the present invention includes an annular cover 21 and an annular air filter fixing member 22, and a plurality of first positioning posts 211 are provided on the first side of the cover 21 . A plurality of positioning holes 223 are provided on the first side of the air filter fixing member 22, and the cover member 21 is inserted into the positioning holes 223 through the first positioning post 211 to realize the connection with the air filter fixing member 22. The air filter fixing member 22 is provided with a circumferentially extending buckle 221 connected to the inner shell 7 on the inner periphery thereof. The outer periphery of the air filter fixing member 22 is provided with a plurality of first air inlets 222 arranged in a circumferential direction. The outer periphery of the second side of the air filter 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 filter 53. The first side of the tubular air filter 53 and The air inlet cover 2 is sealed by a ring seal. The outer periphery of the air filter fixing member 22 is also provided with a buckle 224 that cooperates with the filter 5. The air filter fixing member 22 is sealed with the inner shell 7 through a third annular sealing member 23. The third annular sealing member 23 is preferably a sealing ring, but is not limited to this.

Continuing to refer to Figures 4 to 9, the filter 5 of the present invention includes a tubular air filter 53. The first side of the tubular air filter 53 is provided with a first annular positioning member 52 for fixing the first annular seal 51. The first side A slot 56 is provided on the outer circumference of the filter 5, and the slot 56 of the filter 5 is detachably engaged with the buckle 224 of the air inlet cover 2. A second annular positioning member 54 for fixing the second annular sealing member 55 is provided on the second side. The first side of the tubular air filter 53 is sealed with the air inlet cover 2 by a first annular sealing member 51, and the second side of the tubular air filter 53 is sealed with the housing 3 by a second annular sealing member 55. The material of the first ring seal 51 and the second ring seal 55 is preferably a slow rebound sponge. The medium of the tubular air filter 53 can be an existing air filter material or an air filter material invented in the future, and is not limited to this.

Fig. 10 is a schematic diagram of the exploded state of the fan motor and the inner casing of the bladeless fan of the present invention. 11 is a schematic view of the combined state of the suction cover and the connecting housing in the bladeless fan of the present invention from a first perspective. 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 second view of the combined state of the suction cover and the connecting housing in the bladeless fan of the present invention. As shown in Figures 10 to 14, the inner shell 7 of the present invention includes a connecting shell 71 and a mesh inner liner 72. The first side of the connecting shell 71 is engaged with one side of the mesh inner liner 72, and the fan motor 6 is Fixed in the connecting housing 71, the fan motor 6 includes a drainage cover 61, an upper cover 62, a motor 63, a middle cover 64, an impeller 65, an impeller cover 66, a positioning member 67, and a fourth annular sealing member assembled in sequence along the first direction. 68. Inhalation inlet 69. The motor 63 drives the impeller 65 to rotate and guides the air flow from the mesh liner 72 into the fan motor 6 through the suction inlet 69. The pressurized air flow flows in the first direction through the suction cover 61 to the air outlet, and finally enters the nozzle Jet outwards. The fan motor 6 is sealed with the mesh liner 72 by a fourth annular sealing member 68, and the fourth annular sealing member 68 is preferably a sponge. The second side of the connecting housing 71 is provided with a slot 73 that is detachably buckled with the buckle 221 and provides a circumferential sliding passage.

Among them, the air outlet is provided in the drafting cover 61, and the guide wall of the drafting cover 61 facing the impeller 65 is provided with a plurality of spoilers 611 to prevent the air flow from flowing out of the air outlet to form a circumfluence, and to guide the air flow to the air outlet. The deflector 612, the plane on which the deflector 612 is located is parallel to the first direction, and a plurality of deflectors 612 merge at the air outlet to form a deflector 613. The deflector 613 includes a deflector wall formed by the extension of the deflector 612 on multiple sides , The plane where the drainage wall is located is parallel to the first direction, which strengthens the strength of the air flow of the fan motor 6 and reduces the noise in the process of guiding the air flow.

Fig. 15 is an exploded view of the base in the bladeless fan of the present invention. Fig. 16 is a perspective view of the supporting member in the bladeless fan of the present invention. As shown in Figures 15 to 16, the base 4 of the bladeless fan of the present invention includes a support 41, a base housing 42, a rotating motor, a bottom plate 43, and the like. Among them, the support plate 413 in the center of the support 41 supports the bottom of the barrel-shaped shell, and the support plate 413 is surrounded by a rim 412 whose height is lower than that of the support plate 413, and a sinking shoulder is passed between the support plate 413 and the rim 412. 411 Excessive connection. A retreat space 414 is formed on the outer periphery of the support plate 413 by sinking the shoulder 411.

Fig. 17 is a schematic diagram of the cooperation between the base and the casing in the bladeless fan of the present invention. As shown in Figure 17, the bottom of the barrel-shaped shell of the present invention is provided with a downwardly protruding boss, and the end face of the boss facing the base 4 is provided with a plurality of firsts spreading from the center of the barrel-shaped shell to the periphery. An opening 34, the first opening 34 communicates with the diffusion channel 33. A second opening 35 extending in the first direction is provided on the inner side surface of the center of the barrel-shaped shell toward which the boss faces, and the second opening 35 communicates with the diffusion channel 33. The boss is located in the avoidance space 414 around the support plate 413, so as to increase the air flow of the second air inlet channel 32 and allow more air flow to enter the diffusion channel 33 under the premise of a constant height.

In a preferred embodiment, the first opening 34 corresponds to the second opening 35 one-to-one, and each first opening 34 communicates with the second opening 35 to form a three-dimensional air inlet. In this embodiment, the three-dimensional air inlet forms a first projected area on a first plane, and the first plane (equivalent to a horizontal plane) is a plane perpendicular to the axis of the rotation axis of the base 4; and the three-dimensional air inlet is based on The second plane has a second projection area, and the second plane (equivalent to a vertical plane) is a plane perpendicular to the base 4 passing through the axis of the rotation axis and perpendicular to the opening direction of the second opening 35. In a preferred solution, 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 based on a vertical plane opening. Two openings 35, the inner end of the first opening 34 is communicated with the lower end of the second opening 35 to form an L-shaped opening to further increase the air flow of the second air inlet channel 32, but not limited to this .

Fig. 18 is a schematic diagram of the air duct of the bladeless fan of the present invention. As shown in Figure 18, the cover 21 has an arc-shaped air guiding edge, and the housing 3 has an annular edge protruding from the air filter fixing member 22. The arc-shaped air guiding edge and the annular edge cooperate to guide the air flow into the first air. The first annular air guiding slit of the inlet 222, the opening direction of the first end of the first annular air guiding slit is perpendicular to the first direction, and the first annular air guiding slit communicates with the opening of the second end of the first air inlet 222 The direction is parallel to the first direction. In this embodiment, the first annular air guide slit is used as the first air inlet channel 31 to realize the air intake function at the upper end of the housing 3, but it is not limited to this. The base 4 and the bottom of the housing 3 cooperate to form a second annular air guide slit for guiding the air flow into 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 connecting avoidance space of the two annular air guide slits is parallel to the first direction, so as to avoid directly sucking air from the ground, reducing the dust entering the bladeless fan, and setting the avoiding space 414 allows some dust to have a chance It is deposited at the bottom of the avoiding space 414, thereby further providing a space for dust precipitation. The first opening 34 and the second opening 35 are exposed in the escape space 414. In this embodiment, the second annular air guide slit is used as the second air inlet channel 32 to realize the air intake function at the lower end of the housing 3, but it is not limited to this.

When the bladeless fan of the present invention is working, the fan motor 6 rotates to suck in the air flow, and guide the air flow around the bladeless fan from the first air inlet channel 31 circularly at the upper end of the housing 3 and the second air inlet channel 32 circularly at the lower end. Enter the diffusion channel 33 between the housing 3 and the tubular air filter 53 respectively. As the air flow is diffused in the diffusion channel 33, the air flow is more evenly guided to the entire upstream surface of the filter 5, after being filtered by the filter 5. The clean air flow continues to pass through the mesh liner 72 and is sucked into the fan motor 6. The pressurized air flow flows to the air outlet in the first direction, and finally enters the nozzle and sprays outward. During the whole process, the upper area of the tubular air filter 53 is mainly used to filter the outside air from the first air inlet passage 31, and the lower area of the tubular air filter 53 is mainly used to filter the outside air from the second air inlet passage 32. The central area of the tubular air filter 53 can filter the outside air that comes from the first air inlet channel 31 and the second air inlet channel 32 and then diffuses through the diffusion channel 33, which perfectly realizes the three parts of the tubular air filter 53. It can be used very uniformly, which greatly extends the service life of the filter and reduces the number of filter replacements.

Fig. 19 is a schematic diagram of an exploded state of the nozzle in the bladeless fan of the present invention. 20 is a schematic cross-sectional view of the 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 Figs. 19-21, 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 in the accessory 12. The housing 11 is sealed with the fan motor 6 by a fifth ring-shaped sealing member 16, and the fifth ring-shaped sealing member 16 is preferably a sponge. The purified and pressurized air flow from the fan motor 6 can be further heated in the nozzle 1 and then sprayed out. Wherein, in the internal channel 110 of the housing 11, each accessory 12 has an exhaust port 121 and a wind collecting cavity 122. The air collection cavity 122 and the exhaust port 121 are both arranged on the attachment 12 detachably nested in the housing 11, which is convenient to manufacture and is more conducive to the disassembly and maintenance of the heating device 13, as well as the air collection cavity 122 and the exhaust port 121 Disassembly and cleaning, etc. In addition, the accessory 12 includes a mouth at the front end and a housing of the air collecting cavity 122 connected to the rear end of the mouth. The air outlet 121 has multiple and longitudinally distributed on the mouth. The housing 52 of the air collecting cavity 122 A wind-collecting cavity 122 is formed inside, the wall of the housing 11 is provided with a longitudinal through opening for nesting the mouth, and the inner wall of the housing 11 is provided with two longitudinal positioning grooves located on both sides of the inner end of the longitudinal through opening 25. The two accessories 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 the end of the first cavity 1221, and the area between the air inlet 124 of the air collecting cavity 122 and the second cavity 1222 constitutes The first cavity 1221, the area between the end 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 arranged in the first cavity 1221, and the airflow passing through the heating device 13 Both the air flow passing through the heat insulation channel 123 enter the second cavity 1222 and are conveyed from the air outlet of the air collection cavity 122 to the air outlet 121. The air-collecting cavity 122, the heating device 13 and the exhaust port 121 are all set based on the same central plane, that is, the longitudinal center plane H of the air-collecting cavity 122, the heating device 13 and the longitudinal center plane I of the exhaust port 121 are on the same plane, so that After being heated by the heating device 13, the air flow is discharged through the exhaust port 121 in a straight direction without turning or changing direction. This can avoid the heat loss of the hot air flow during the output process, thereby improving the thermal efficiency of the fan. At the same time, when cold air is blowing, that is, when the temperature control switch is not turned on, the output efficiency of the air flow can be improved, and the air supply distance can be extended. In addition, the housing 11 is located within the annular range of the air intake cover 2 based on the projection of the plane where the air intake cover 2 is located, and the lifting stroke of the air intake cover 2 in the first direction does not interfere, ensuring that the air intake cover 2 The housing 3 can be lifted out of the housing 3 or pressed into the housing 3 through a lifting stroke surrounding the housing 11.

Figures 22-27 are schematic diagrams of the process of replacing the filter screen of the bladeless fan of the present invention. As shown in Figures 22-27, when the filter 5 needs to be replaced, the air inlet cover 2 is rotated to separate the buckle 221 of the air inlet cover 2 from the slot 73 of the inner shell 7 and then surround the nozzle The lifting stroke of the housing 11 of 1 raises the housing 3 until the height of the nozzle 1 is exceeded, and the filter 5 is brought out. Then separate the buckle 224 of the air inlet cover 2 and the slot 56 of the filter 5, remove the used filter 5 from the air inlet cover 2, replace the unused air filter 5N, and then snap the card Buckle 224 and slot 56. Finally, press the air inlet cover 2 with the filter 5 into the housing 3 along the lifting stroke of the housing 11 surrounding the nozzle 1 and rotate and lock it. The leafless fan in the present invention only needs one component disassembly action to replace the filter screen, and only needs to replace the filter screen once, which greatly reduces the workload and time of replacing the filter screen and improves the humanized experience.

In summary, the purpose of the present invention is to provide a bladeless fan for purifying air, which can make the air pass through the filter more evenly, prolong the service life of the filter, reduce the number of filter replacements, and reduce the cost of air purifiers. , Which is more conducive to the improvement of the indoor environment and provides a cleaner living environment.

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

Claims

A fan, characterized in that it comprises:

The body includes an outer shell, an inner shell arranged in the outer shell, an air intake cover plate, a first air inlet, a second air inlet, an air outlet, and a fan motor for generating air flow through the body, the first The air inlet and the second air inlet are arranged at intervals along the first direction, the housing is a barrel-shaped shell, and the air inlet cover is detachably connected to the opening of the barrel-shaped shell;

A nozzle connected to the air outlet for receiving the air flow from the body and emitting the air flow, the air inlet cover has a lifting stroke surrounding the nozzle; and

The filter is arranged in the area between the first air inlet and the second air inlet in the body, and is located downstream of the air inlet, and the filter is detachably connected to the air inlet cover.
The fan according to claim 1, wherein the nozzle is based on a projection of the plane where the air inlet cover is located, and is located inside the annular range of the air inlet cover, and is located in the first place with the air inlet cover. The lifting strokes in one direction do not overlap, and the first direction is the height direction of the body.
The fan according to claim 1, wherein the inner periphery of the air inlet cover plate is provided with a plurality of circumferentially extending buckles, and the inner shell is provided with a plurality of circumferentially rotating slide-in channels, A slot that is detachably buckled with the buckle.
The fan according to claim 1, wherein the first air inlet and the second air inlet are respectively formed at both ends of the housing, and at least part of the housing forms a diffuser that guides the air flow into the filter Channel, the upstream surface of the filter is exposed to the diffusion channel.
The fan according to claim 4, wherein the filter comprises a tubular air filter, and the tubular air filter is disposed between the inner circumference of the barrel-shaped casing and the outer circumference of the inner casing, and The tubular gap between the upstream surface of the tubular air filter and the inner wall of the barrel-shaped casing forms the diffusion channel.
The fan of claim 5, wherein at least one first air inlet arranged around the tubular air filter is arranged along the edge of the air inlet cover, and the first air inlet communicates with the diffusion channel The first end.
The fan according to claim 6, wherein one side of the air inlet cover is provided with a circumferential positioning groove, and the circumferential positioning groove is detachably engaged with the first side of the tubular air filter , The first side of the tubular air filter and the air inlet cover plate are sealed by an annular seal.
The fan according to claim 7, wherein the second side of the tubular air filter abuts against the bottom of the barrel-shaped casing, and the second side of the tubular air filter is between the outer shell and the second side of the tubular air filter. Sealed by ring seals.
The fan according to claim 6, wherein at least one second air inlet arranged around the tubular air filter is provided on the edge of the bottom of the barrel-shaped casing, and the second air inlet communicates with the diffuser. The second end of the channel.
A method for replacing the filter screen of a fan, characterized in that adopting the fan according to any one of claims 1 to 9 includes the following steps:

Unlocking the air inlet cover by rotating, so that the air inlet cover is separated from the inner shell;

Lifting the air inlet cover plate connected with the filter to be replaced to the casing along the lifting stroke of the casing surrounding the nozzle until it exceeds the height of the nozzle;

Remove the filter to be replaced from the air inlet cover and replace it with an unused filter;

The air intake cover with the unused filter is pressed into the housing along the lifting stroke of the housing surrounding the nozzle and locked by rotation.