Bladeless fan that purifies the air

Abstract

The present invention provides a bladeless fan for purifying air, comprising: a body, the body comprising 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 arranged at intervals along a first direction; a nozzle connected to the air outlet, for receiving the air flow from the body and emitting the air flow, a heating device being arranged in the internal channel of the nozzle, at least a part of the air flow received in the internal channel passes through the heating device and is discharged outward from the exhaust port, and the longitudinal center plane of the exhaust port is parallel to or in the same plane as the longitudinal center plane of the heating device; and a filter, arranged in the area between the first air inlet and the second air inlet in the body, and located downstream of the air inlet. The present invention can make the air pass through the filter more evenly, prolong the service life of the filter, and reduce the number of times the filter is replaced.

Description

Technical Field

[0001] The invention relates to the field of refrigeration equipment, in particular to a bladeless fan for purifying air. Background Art

[0002] With the continuous improvement of living and technological levels, people's requirements for quality of life are increasing. Indoor air quality has become an important issue of concern to people, and the demand for air purifiers is also increasing.

[0003] Air purifiers are small household appliances used to purify indoor air, mainly to solve indoor air pollution problems caused by decoration or other reasons. Since the release of pollutants in indoor air is persistent and uncertain, using 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 clean and safe air to users. Commonly used air purification technologies include: 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, etc.; material technologies mainly include: photocatalyst, activated carbon, synthetic fiber, HEPA high-efficiency material, etc. The cost of high-quality filters will account for 20% to 30% of the total cost of air purifiers.

[0004] At present, there are many bladeless fans with air filters. Figure 1 FIG. 1 is a cross-sectional view of a bladeless fan with an air filter in the prior art. Figure 1As shown, most of them have a large nozzle 91, a shell 93, a base 94, a filter 95, a fan motor 96 and a mesh liner 97. Among them, the shell 93 with an air inlet mesh is set on the base 94, the shell 93 is provided with a filter 95, the filter 95 is provided with a mesh liner 97, the mesh liner 97 is provided with a first air inlet of the fan motor 96, the nozzle 91 is set above the shell 93, and the air outlet of the fan motor 96 is connected to the nozzle 91. The indoor air passes through the mesh of the shell 93 and the filter 95 in turn, and then enters the mesh liner 97, and is sucked into the fan motor 96 and pressurized and ejected from the nozzle 91. In this structure, in order to maximize the total area of ​​the air inlet mesh and the filter area, the air inlet mesh is maximized at the full height of the shell surface, and the filter is configured at the same height as the air inlet mesh area. The air inlet mesh of the casing and the filter 95 are arranged in basically the same section along the height direction. However, since 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 purpose of suction effect, the air from the lower air inlet mesh can reach the first air inlet of the fan motor 96 almost in a straight line, and the suction force obtained by the shorter distance is greater, while the air from the upper air inlet mesh needs to pass through a longer route to reach the first air inlet, and the suction force obtained by the longer distance is significantly reduced. In this case, the suction force of the fan motor 96 is significantly different for the air from the air inlet meshes at different heights, and the air sucked by the air inlet meshes closer to the bottom of the casing 93 is The amount of air sucked in will be significantly greater than the amount of air sucked in the air inlet mesh away from the bottom of the shell 93, and the difference is as much as 2.5 to 3 times, which makes the usage degree of the filters in the corresponding areas significantly different. In simple terms, after a period of use, the lower filter 95 close to the bottom of the shell 93 becomes the heavily used filter part 95B, and the upper filter 95 away from the bottom of the shell 93 becomes the lightly used filter part 95A. However, at this time, because the filter part 95B that mainly filters the air has been severely used, it must be replaced. 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.

[0005] In addition, the outer shell of this type of bladeless fan is a structure of two shells horizontally matched, and each shell is provided with a filter. The filter 95 is sealed between the three-dimensional sealing strip set downstream and the mesh liner 97. The cost of the three-dimensional sealing strip is extremely high, and the sealing effect is poor after long-term use. Moreover, when replacing the filter 95, it is necessary to disassemble the two shells separately, replace the filter, and then install them back. The process is cumbersome and the humanized experience is poor.

[0006] Therefore, the present invention provides a bladeless fan for purifying air. Summary of the invention

[0007] In response to the problems in the prior art, the purpose of the present invention is to provide a bladeless fan for purifying air, which overcomes the problems of the prior art and can make the air pass through the filter more evenly, thereby extending the service life of the filter, reducing the number of times the filter needs to be replaced, and reducing the cost of using the air purifier, which is more conducive to improving the indoor environment and providing a cleaner living environment.

[0008] An embodiment of the present invention provides a bladeless fan for purifying air, comprising:

[0009] A body, comprising a first air inlet, a second air inlet, an air outlet, and a fan motor for generating an air flow through the body, wherein the first air inlet and the second air inlet are spaced apart in a first direction;

[0010] a nozzle connected to the air outlet, used to receive the air flow from the body and emit the air flow, a heating device is provided in the internal channel of the nozzle, at least a part of the air flow received in the internal channel passes through the heating device and is discharged outward from the air outlet, and the longitudinal center plane of the air outlet and the longitudinal center plane of the heating device are parallel to each other or in the same plane; and

[0011] The filter is disposed in the body between the first air inlet and the second air inlet, and is located downstream of the air inlet.

[0012] Preferably, an air collecting chamber is provided in the internal channel of the nozzle, a heating device is provided in the air collecting chamber, the air inlet of the air collecting chamber is connected with the internal channel, the air outlet of the air collecting chamber is connected with the exhaust port, a heat insulating channel is formed between the heating device and the inner wall of the air collecting chamber, after the airflow received in the internal channel enters the air collecting chamber from the air inlet, part of the airflow passes through the heating device, and the other part of the airflow passes through the heat insulating channel.

[0013] Preferably, the airflow passing through the heating device and the airflow passing through the heat-insulating channel are both transported from the air outlet of the air collecting chamber to the exhaust port, and a plurality of supporting ribs are provided in the heat-insulating channel, one end of the supporting rib is connected to the inner wall of the air collecting chamber, and the other end is abutted against the outer wall of the heating device.

[0014] Preferably, the air collecting cavity includes a first cavity and a second cavity connected to the end of the first cavity, the area between the air inlet of the air collecting cavity and the second cavity constitutes the first cavity, the area between the end of the first cavity and the air outlet of the air collecting cavity constitutes the second cavity, the heating device is arranged in the first cavity, the airflow passing through the heating device and the airflow passing through the heat insulation channel both enter the second cavity and are transported from the air outlet of the air collecting cavity to the exhaust port.

[0015] Preferably, the air outlet end of the air collecting cavity is arranged as a contraction structure, and the contraction structure comprises two airflow guiding surfaces which gradually contract from the air collecting cavity toward the exhaust port and are arranged symmetrically based on the center of the exhaust port.

[0016] Preferably, the body includes a shell, the first air inlet and the second air inlet are respectively formed at both ends of the shell, at least part of the shell forms a diffusion channel for guiding the air flow into the filter, and the upstream surface of the filter is exposed to the diffusion channel.

[0017] Preferably, the outer shell is a barrel-shaped shell, the filter includes a tubular air filter, the tubular air filter is arranged on the inner circumference of the barrel-shaped shell, and the tubular gap between the upstream surface of the tubular air filter and the inner wall of the barrel-shaped shell forms the diffusion channel.

[0018] Preferably, the body also includes an air inlet cover, which is detachably connected to the opening of the barrel-shaped shell, and 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 is connected to the first end of the diffusion channel, and at least one second air inlet arranged around the tubular air filter is arranged on the edge of the bottom of the barrel-shaped shell, and the second air inlet is connected to the second end of the diffusion channel.

[0019] Preferably, an annular positioning groove is provided on one side of the air inlet cover, and the annular positioning groove can detachably engage the first side of the tubular air filter, the first side of the tubular air filter and the air inlet cover are sealed by an annular seal, the second side of the tubular air filter abuts the bottom of the barrel-shaped shell, and the second side of the tubular air filter and the shell are sealed by an annular seal.

[0020] Preferably, it further comprises a base having a rotating shaft and a motor driving the rotating shaft, wherein the rotating shaft supports the body.

[0021] The air purifying bladeless fan of the present invention can make the air pass through the filter more evenly, thereby extending the service life of the filter, reducing the number of times the filter needs to be replaced, and reducing the use cost of the air purifier, which is more conducive to improving the indoor environment and providing a cleaner living environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0023] Figure 1 The present invention is a cross-sectional view of a bladeless fan with an air filter according to the prior art.

[0024] Figure 2 Schematic diagram of a bladeless fan of the present invention.

[0025] Figure 3 It is a three-dimensional diagram of the bladeless fan of the present invention.

[0026] Figure 4 The figure is an exploded schematic diagram of the air inlet cover, the filter screen and the outer shell of the bladeless fan of the present invention.

[0027] Figure 5 The figure is a schematic diagram of the combined state of the air inlet cover plate and the filter screen in the bladeless fan of the present invention.

[0028] Figure 6 for Figure 5 sectional view of .

[0029] Figure 7 for Figure 5 Bottom view of .

[0030] Figure 8 The figure is a schematic diagram of the exploded state of the air inlet cover plate and the filter screen in the bladeless fan of the present invention.

[0031] Fig. 9 for Figure 8 sectional view of .

[0032] Fig.10 It is a schematic diagram of the exploded state of the fan motor and the inner shell in the bladeless fan of the present invention.

[0033] Fig.11 It is a schematic diagram of the combined state of the air guide cover and the connecting shell in the bladeless fan of the present invention from a first viewing angle.

[0034] Fig.12 for Fig.11 Bottom view of .

[0035] Fig.13 for Fig.11 Top view of the .

[0036] Fig.14 It is a schematic diagram of the second viewing angle of the combined state of the air guide cover and the connecting shell in the bladeless fan of the present invention.

[0037] Fig.15 The figure is an exploded view of the base of the bladeless fan of the present invention.

[0038] Fig.16 It is a three-dimensional diagram of the support member in the bladeless fan of the present invention.

[0039] Fig.17 It is a schematic diagram of the cooperation between the base and the shell of the bladeless fan of the present invention.

[0040] Fig.18Schematic diagram of the air duct of the bladeless fan of the present invention.

[0041] Fig.19 It is a schematic diagram of the exploded state of the nozzle in the bladeless fan of the present invention.

[0042] Fig. 20 It is a schematic cross-sectional view of the nozzle in the bladeless fan of the present invention.

[0043] Fig.21 It is a top view of the bladeless fan of the present invention.

[0044] Figure 22 to Figure 27 The present invention is a schematic diagram of the process of replacing the filter screen of the bladeless fan.

[0045] Reference numerals

[0046] 1 Nozzle 5 Air filter

[0047] 11 housing 51 first annular seal

[0048] 110 internal channel 52 first annular positioning member

[0049] 12 Accessory 53 Tubular air filter

[0050] 121 Exhaust port 54 Second annular positioning member

[0051] 122 air collecting chamber 55 second annular seal

[0052] 1221 first cavity 56 slot

[0053] 1222 Second chamber 5N Unused air filter

[0054] 123 Insulation channel 6 Fan motor

[0055] 124 Air inlet 61 Drainage cover

[0056] 13 Heating device 611 Spoiler

[0057] 14 Cable 612 Drainage piece

[0058] 15 Cover plate 613 guide piece

[0059] 16 Fifth annular seal 62 Upper cover

[0060] 17 Fixing 63 Motor

[0061] 10 body 64 middle cover

[0062] 2 Air inlet cover 65 Impeller

[0063] 21 Cover plate 66 Impeller cover

[0064] 211 first positioning column 67 positioning piece

[0065] 22 Air filter fixing part 68 Fourth annular seal

[0066] 221 Buckle 69 Air intake

[0067] 222 first air inlet 7 inner shell

[0068] 223 Positioning hole 71 Connecting housing

[0069] 224 buckle 72 mesh liner

[0070] 225 Annular positioning groove 73 slot

[0071] 23 Third annular seal 91 Nozzle

[0072] 3 Shell 93 Shell

[0073] 31 First air inlet channel 94 Base

[0074] 32 Second air inlet channel 95 filter

[0075] 33 Diffusion channel 95A Lightly used filter section

[0076] 34 First opening 95B Heavily used filter part

[0077] 35 Second opening 96 Fan motor

[0078] 36 Second air inlet 97 Mesh liner

[0079] 4 Base

[0080] 41 Support

[0081] 411 Drop Shoulder

[0082] 412 Edge

[0083] 413 Support Plate

[0084] 42 Housing

[0085] 43 Base Plate DETAILED DESCRIPTION

[0086] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0087] Figure 2 Schematic diagram of a bladeless fan of the present invention. Figure 3 FIG. 2 is a perspective view of a bladeless fan of the present invention. Figure 2 and 3As shown, the bladeless fan for purifying air of the present invention comprises a body 10, a nozzle 1, a filter 5 and a base 4. The body 10 comprises 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, wherein the first air inlet 222 and the second air inlet 36 are arranged at intervals along a first direction, and the first direction is the height direction of the body 10, i.e., the straight line direction defined by the reference numerals A and B in the figure. In this embodiment, the first direction is also the direction of the rotation axis of the base 4 rotating the body 10 and the direction in which the fan motor 6 guides the air flow, but is not limited thereto. The nozzle 1 is connected to the air outlet, and is used to receive the air flow from the body 10 and emit 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 driving the rotating shaft, and the rotating shaft supports the body 10. In this embodiment, the body 10 includes a shell 3, a first air inlet 222 and a second air inlet 36 are respectively formed at both ends of the shell 3, and at least part of the shell 3 forms a diffusion channel 33 for guiding the 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 not limited to this. The shell 3 is a barrel-shaped shell, and the filter 5 includes a tubular air filter 53, and the tubular air filter 53 is arranged on the inner periphery of the barrel-shaped shell, and the tubular gap between the upstream surface of the tubular air filter 53 and the inner wall of the barrel-shaped shell forms the diffusion channel 33. The upstream surface of the filter 5 is exposed to the diffusion channel 33, so as to guide the air flow to the upstream surface of the filter 5 more evenly. In this embodiment, the body 10 also includes an air inlet cover plate 2, which is detachably connected to the opening of the barrel-shaped shell, and 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 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 provided at the edge of the bottom of the barrel-shaped shell, and the second air inlet 36 is connected to 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 seal. The air inlet on the shell of the bladeless fan for purifying air of the present invention is not directly facing the air intake 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 can be used very evenly, which greatly prolongs the service life of the filter and reduces the number of times the filter is replaced.

[0088] Figure 4 The figure is an exploded schematic diagram of the air inlet cover, the filter screen and the outer shell of the bladeless fan of the present invention. Figure 5 The figure is a schematic diagram of the combined state of the air inlet cover plate and the filter screen in the bladeless fan of the present invention. Figure 6 for Figure 5 sectional view of . Figure 7 for Figure 5 Bottom view of . Figure 8 The figure is a schematic diagram of the exploded state of the air inlet cover plate and the filter screen in the bladeless fan of the present invention. Fig. 9 for Figure 8 A cross-sectional view of Figures 4 to 9 As shown, the air inlet cover plate 2 of the present invention comprises an annular cover plate member 21 and an annular air filter fixing member 22, and a plurality of first positioning columns 211 are provided on the first side of the cover plate member 21. A plurality of positioning holes 223 are provided on the first side of the air filter fixing member 22, and the cover plate member 21 is connected to the positioning holes 223 by plugging the first positioning columns 211 into the positioning holes 223 to achieve connection with the air filter fixing member 22. The inner periphery of the air filter fixing member 22 is provided with a circumferentially extending plug buckle 221 connected to the inner shell 7. The outer periphery of the air filter fixing member 22 is provided with a plurality of circumferentially arranged first air inlets 222. The outer periphery of the second side of the air filter fixing member 22 is provided with an annular positioning groove 225, and the annular positioning groove 225 is detachably engaged with the first side of the tubular air filter 53, and the first side of the tubular air filter 53 is sealed with the air inlet cover plate 2 by an annular sealing member. 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 via a third annular seal 23 . The third annular seal 23 is preferably a sealing ring, but not limited thereto.

[0089] Continue to refer Figures 4 to 9 The filter 5 of the present invention includes a tubular air filter 53. A first annular positioning member 52 for fixing a first annular seal 51 is provided on the first side of the tubular air filter 53. A slot 56 is provided on the outer periphery of the first side. 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 a second annular seal 55 is provided on the second side. The first side of the tubular air filter 53 is sealed with the air inlet cover 2 through the first annular seal 51, and the second side of the tubular air filter 53 is sealed with the outer casing 3 through the 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 can be an existing air filter material or an air filter material invented in the future, but is not limited thereto.

[0090] Fig.10 It is a schematic diagram of the exploded state of the fan motor and the inner shell in the bladeless fan of the present invention. Fig.11 It is a schematic diagram of the combined state of the air guide cover and the connecting shell in the bladeless fan of the present invention from a first viewing angle. Fig.12 for Fig.11 Bottom view of . Fig.13 for Fig.11 Top view of the . Fig.14 FIG. 2 is a schematic diagram of the combination state of the air guide cover and the connecting shell in the bladeless fan of the present invention from a second viewing angle. Figures 10 to 14As shown, the inner shell 7 of the present invention includes a connecting shell 71 and a mesh liner 72, the first side of the connecting shell 71 is engaged with one side of the mesh liner 72, the fan motor 6 is fixed in the connecting shell 71, and the fan motor 6 includes a 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 an air inlet 69 assembled in sequence along a first direction. The motor 63 drives the impeller 65 to rotate, and after the air flow is guided from the mesh liner 72 into the fan motor 6 through the air inlet 69, the pressurized air flow flows along the first direction through the guide cover 61 to the air outlet, and finally enters the nozzle to be ejected outward. The fan motor 6 is sealed with the mesh liner 72 by the fourth annular seal 68, and the fourth annular seal 68 is preferably a sponge. The second side of the connecting shell 71 is provided with a slot 73 that is detachably engaged with the buckle 221 to provide a circumferential sliding channel.

[0091] Among them, the air outlet is arranged on the guide wall of the guide hood 61 on the side facing the impeller 65, and a plurality of spoilers 611 are arranged to prevent the air flow from forming a vortex at the air outlet, and guide plates 612 are arranged to guide the air flow to the air outlet. The plane where the guide plates 612 are located is parallel to the first direction. The plurality of guide plates 612 converge at the air outlet to form a guide member 613. The guide member 613 includes a plurality of guide walls formed by extending the guide plates 612. The planes where the guide walls are located are parallel to the first direction, which enhances the strength of the air flow of the fan motor 6 and reduces the noise in the process of guiding the air flow.

[0092] Fig.15 The figure is an exploded view of the base of the bladeless fan of the present invention. Fig.16 FIG. 1 is a three-dimensional diagram of a support member in a bladeless fan of the present invention. Figures 15 to 16 As shown, the base 4 of the bladeless fan of the present invention includes a support member 41, a housing 42, a rotating motor, and a bottom plate 43. Among them, a support plate 413 in the center of the support member 41 supports the bottom of the barrel-shaped housing, and a rim 412 with a height lower than the support plate 413 is arranged around the support plate 413, and the support plate 413 and the rim 412 are connected to each other through a sunken shoulder 411. A relief space 414 is formed on the periphery of the support plate 413 by the sunken shoulder 411.

[0093] Fig.17 FIG. 1 is a schematic diagram of the cooperation between the base and the housing of the bladeless fan of the present invention. Fig.17As shown, the bottom of the barrel-shaped shell in the present invention is provided with a boss protruding downward in the circumferential direction, and the end surface of the boss facing the base 4 is provided with a plurality of first openings 34 arranged to spread out from the center of the barrel-shaped shell to the surroundings, and the first openings 34 are connected to the diffusion channel 33. The inner side surface of the barrel-shaped shell facing the center of the boss is provided with a second opening 35 extending along the first direction, and the second opening 35 is connected to 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 under the premise of unchanged height, so that more air flow enters the diffusion channel 33.

[0094] In a preferred embodiment, the first opening 34 corresponds to the second opening 35 one by one, and each first opening 34 is connected to the second opening 35 to form a three-dimensional air inlet. In this embodiment, the three-dimensional air inlet forms a first projection area based on the 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 has a second projection area based on the second plane, and the second plane (equivalent to a vertical plane) is a plane perpendicular to the axis of the rotation axis of 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 can be an L-shaped three-dimensional air inlet, including a first opening 34 based on a horizontal plane opening and a second opening 35 based on a vertical plane opening, the inner end of the first opening 34 is connected to the lower end of the second opening 35, and together form an L-shaped opening, further increasing the air flow of the second air inlet channel 32, but not limited to this.

[0095] Fig.18 FIG. 1 is a schematic diagram of the air duct of the bladeless fan of the present invention. Fig.18As shown, the cover plate 21 has an arc-shaped air guide edge, and the housing 3 has an annular edge protruding from the air filter fixing member 22. The arc-shaped air guide edge cooperates with the annular edge to form a first annular air guide slit for guiding the air flow into the first air inlet 222. The opening direction of the first end of the first annular air guide slit is perpendicular to the first direction, and the opening direction of the second end of the first annular air guide slit connected to the first air inlet 222 is parallel to the first direction. In this embodiment, the first annular air guide slit serves as the first air inlet channel 31 to realize the air intake function located at the upper end of the housing 3, but is not limited thereto. The base 4 cooperates with the bottom of the housing 3 to form a second annular air guide slit that guides 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, and the opening direction of the second end of the second annular air guide slit connected to the avoidance space is parallel to the first direction, so as to avoid directly sucking air from the ground and reduce the dust entering the bladeless fan. In addition, the avoidance space 414 is provided to allow some dust to have the opportunity to settle at the bottom of the avoidance space 414, thereby further providing a space for dust precipitation. 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 serves as the second air inlet channel 32 to realize the air intake function at the lower end of the housing 3, but is not limited thereto.

[0096] When the bladeless fan of the present invention is working, the fan motor 6 rotates to inhale air flow, guiding the air flow around the bladeless fan to enter the diffusion channel 33 between the outer shell 3 and the tubular air filter 53 from the first air inlet channel 31 circumferentially at the upper end of the outer shell 3 and the second air inlet channel 32 circumferentially at the lower end. Since 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. The clean air flow filtered by the filter 5 continues to pass through the mesh inner liner 72 and is then inhaled into the fan motor 6. The pressurized air flow flows toward the air outlet along the first direction, and finally enters the nozzle and is sprayed 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 channel 31, the lower area of ​​the tubular air filter 53 is mainly used to filter the outside air from the second air inlet channel 32, and the middle area of ​​the tubular air filter 53 can filter the outside air from the first air inlet channel 31 and the second air inlet channel 32 after being diffused through the diffusion channel 33, perfectly realizing that the three parts of the tubular air filter 53 can be used very evenly, greatly extending the service life of the filter and reducing the number of times the filter is replaced.

[0097] Fig.19 It is a schematic diagram of the exploded state of the nozzle in the bladeless fan of the present invention. Fig. 20 It is a schematic cross-sectional view of the nozzle in the bladeless fan of the present invention. Fig.21 FIG. 2 is a top view of the bladeless fan of the present invention. Figures 19 to 21As shown, the nozzle 1 in the present invention includes a shell 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 arranged on the accessory 12. The shell 11 is sealed with the fan motor 6 by the fifth annular seal 16, and the fifth annular seal 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 ejected. Among them, in the internal channel 110 of the shell 11, each accessory 12 has an exhaust port 121 and an air collecting chamber 122. The air collecting chamber 122 and the exhaust port 121 are both arranged on an accessory 12 that is detachably nested in the shell 11, which is convenient for manufacturing and is more conducive to the disassembly and maintenance of the heating device 13 and the disassembly and cleaning of the air collecting chamber 122 and the exhaust port 121. In addition, the accessory 12 includes a mouth at the front end and an air collecting chamber 122 shell connected to the rear end of the mouth, the exhaust ports 121 are multiple and longitudinally arranged in a row on the mouth, an air collecting chamber 122 is formed inside the air collecting chamber 122 shell 52, a longitudinal through opening for nesting the mouth is provided on the wall of the outer shell 11, and two longitudinal positioning grooves located on both sides of the inner end of the longitudinal through opening 25 are provided on the inner wall of the outer shell 11, and the two accessories 12 are respectively fixed in the longitudinal positioning grooves.

[0098] In this embodiment, the air collecting chamber 122 includes a first cavity 1221 and a second cavity 1222 connected to the end of the first cavity 1221. The area between the air inlet 124 of the air collecting chamber 122 and the second cavity 1222 constitutes the first cavity 1221, and the area between the end of the first cavity 1221 and the air outlet of the air collecting chamber 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 and the airflow passing through the heat insulation channel 123 both enter the second cavity 1222 and are transported from the air outlet of the air collecting chamber 122 to the exhaust port 121. The air collecting chamber 122, the heating device 13 and the exhaust port 121 are all arranged based on the same central plane, that is, the longitudinal central plane H of the air collecting chamber 122 and the heating device 13 and the longitudinal central plane I of the exhaust port 121 are on the same plane, so that the airflow is discharged through the exhaust port 121 in a straight direction after being heated by the heating device 13, without turning or changing direction in the middle, so as to 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 blowing cold air, that is, when the temperature control switch is not turned on, the output efficiency of the airflow can also be improved, and the air supply distance can be extended. In addition, the outer shell 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, and the lifting stroke of the air inlet cover plate 2 in the first direction does not interfere, ensuring that the air inlet cover plate 2 can be lifted out of the outer shell 3 or pressed into the outer shell 3 through the lifting stroke surrounding the outer shell 11.

[0099] Figure 22 to Figure 27 The figure is a schematic diagram of the process of replacing the filter screen of the bladeless fan of the present invention. Figures 22 to 27 As shown, when the filter 5 needs to be replaced, the air inlet cover plate 2 is rotated to separate the buckle 221 of the air inlet cover plate 2 from the slot 73 of the inner shell 7, and then the shell 3 is lifted along the lifting stroke of the shell 11 surrounding the nozzle 1 until it exceeds the height of the nozzle 1, and the filter 5 is taken out. Then the buckle 224 of the air inlet cover plate 2 and the slot 56 of the filter 5 are separated, and the used filter 5 is removed from the air inlet cover plate 2, and after replacing it with the unused air filter 5N, the buckle 224 and the slot 56 are engaged. Finally, the air inlet cover plate 2 with the filter 5 is pressed into the shell 3 along the lifting stroke of the shell 11 surrounding the nozzle 1 and rotated to lock. The bladeless fan in the present invention only needs one component disassembly action to replace the filter, and only needs to replace the filter once, which greatly reduces the workload and time of replacing the filter and improves the humanized experience.

[0100] 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, extend the service life of the filter, reduce the number of times the filter is replaced, reduce the use cost of the air purifier, and is more conducive to improving the indoor environment and providing a cleaner living environment.

[0101] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the present invention. Several simple deductions or substitutions should be regarded as belonging to the protection scope of the present invention.

Claims

1. A bladeless fan for purifying air, characterized in that: include: 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), wherein the first air inlet (222) and the second air inlet (36) are arranged at intervals along a first direction, and the body (10) comprises a housing (3), wherein the first air inlet (222) and the second air inlet (36) are respectively formed at two ends of the housing (3); A nozzle (1) is connected to the air outlet and is used to receive an air flow from the body (10) and emit the air flow. A heating device (13) is provided in the internal channel (110) of the nozzle (1). At least a portion of the air flow received in the internal channel (110) passes through the heating device (13) and is discharged from the exhaust port. The longitudinal center plane of the exhaust port is parallel to or in the same plane as the longitudinal center plane of the heating device. There is an air collecting chamber (122), a heating device (13) is arranged in the air collecting chamber (122), an air inlet (124) of the air collecting chamber (122) is communicated with the internal channel (110), an air outlet of the air collecting chamber (122) is communicated with the exhaust port (121), a heat insulating channel (123) is formed between the heating device (13) and the inner wall of the air collecting chamber (122), and the airflow received in the internal channel (110) enters the air collecting chamber (122) from the air inlet (124). Afterwards, a part of the airflow passes through the heating device (13), and another part of the airflow passes through the heat-insulating channel (123); the air collecting cavity (122) comprises a first cavity (1221) and a second cavity (1222) connected to the end of the first cavity (1221); the area between the air inlet (124) of the air collecting cavity (122) and the second cavity (1222) constitutes the first cavity (1221); and the area between the end of the first cavity (1221) and the air outlet of the air collecting cavity (122) constitutes the first cavity (1221). The area between the two chambers (122) constitutes the second chamber (1222), the heating device (13) is arranged in the first chamber (1221), the airflow passing through the heating device (13) and the airflow passing through the heat-insulating channel (123) are both transported from the air outlet of the air collecting chamber (122) to the air outlet (121), and a plurality of supporting ribs are arranged in the heat-insulating channel (123), one end of the supporting rib is connected to the inner wall of the air collecting chamber (122), and the other end is in contact with the outer wall of the heating device (13); as well as A filter (5) is arranged in an area between the first air inlet (222) and the second air inlet (36) in the body (10), and is located downstream of the first air inlet (222) and the second air inlet (36). At least a portion of the housing (3) forms a diffusion channel (33) for guiding the air flow into the filter (5), and an upstream surface of the filter (5) is exposed in the diffusion channel (33).

2. The bladeless fan for purifying air according to claim 1, characterized in that: The air outlet end of the air collecting cavity (122) is arranged as a contraction structure, and the contraction structure comprises two airflow guiding surfaces which gradually contract from the air collecting cavity (122) towards the air outlet (121) and are arranged symmetrically based on the center of the air outlet (121).

3. The bladeless fan for purifying air according to claim 1, characterized in that: The housing (3) is a barrel-shaped shell, and the filter (5) includes a tubular air filter (53), which is arranged on the inner periphery of the barrel-shaped shell, and the tubular gap between the upstream surface of the tubular air filter (53) and the inner wall of the barrel-shaped shell forms the diffusion channel (33).

4. The bladeless fan for purifying air according to claim 3, characterized in that: The body (10) further comprises an air inlet cover (2), wherein the air inlet cover (2) is detachably connected to the opening of the barrel-shaped shell, and at least one first air inlet (222) arranged around the tubular air filter (53) is arranged along the edge of the air inlet cover (2), and the first air inlet (222) is 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 at the edge of the bottom of the barrel-shaped shell, and the second air inlet (36) is connected to the second end of the diffusion channel (33).

5. The bladeless fan for purifying air according to claim 4, characterized in that: An annular positioning groove is provided on one side of the air inlet cover (2), and the annular positioning groove can be 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) are sealed by an annular seal. The second side of the tubular air filter (53) abuts against the bottom of the barrel-shaped shell, and the second side of the tubular air filter (53) and the shell (3) are sealed by an annular seal.

6. The bladeless fan for purifying air according to claim 1, characterized in that: It also includes a base (4) having a rotating shaft and a motor driving the rotating shaft, wherein the rotating shaft supports the body (10).

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