Bladeless fan

Abstract

The utility model relates to the technical field of bladeless fans, and provides a bladeless fan which comprises a shell, fan blades and a sound absorption assembly. Wherein the shell is provided with an air duct cavity, an air inlet and an air outlet, the air inlet and the air outlet are communicated with the air duct cavity, the fan blades are rotatably arranged in the air duct cavity, the sound absorption assembly is located in the air duct cavity, the sound absorption assembly and the inner wall of the shell define at least two sound absorption cavities, and the at least two sound absorption cavities are arranged in the air duct cavity at intervals. The bladeless fan provided by the utility model can solve the problem of loud noise of the bladeless fan.

Description

[0001] This application claims priority to the Chinese patent application No. 202423093078.0, filed on December 14, 2024, entitled "A Bladeless Fan", the content of which is incorporated herein by reference in its entirety;

[0002] This application claims priority to the Chinese patent application No. 202423297651.X, filed on December 27, 2024, entitled "A Bladeless Fan", the content of which is incorporated herein by reference in its entirety;

[0003] This application claims priority to the Chinese patent application No. 202520076459.3, filed on January 13, 2025, entitled "A Bladeless Fan", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0004] The present application relates to the technical field of bladeless fan, in particular to a bladeless fan. BACKGROUND

[0005] As a new type of air circulation equipment, the bladeless fan mainly includes an impeller and a flow guide device, the impeller is arranged in the flow guide device, and air is accelerated by the impeller and the flow guide device and then sprayed out of the air outlet of the flow guide device to form a stable air flow.

[0006] When the air passes through the high-speed rotating impeller inside the bladeless fan, vortex and air flow friction are generated inside the flow guide device, resulting in noise of the bladeless fan, and mechanical noise is also generated by the motor of the bladeless fan during operation.

[0007] In the related art, the bladeless fan has the problem of large noise. SUMMARY

[0008] The present application provides a bladeless fan, which can solve the problem of large noise of the bladeless fan.

[0009] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0010] The present application provides a bladeless fan, comprising:

[0011] The shell has an air duct cavity, and an air inlet and an air outlet which are respectively communicated with the air duct cavity;

[0012] The fan blade is rotatably arranged in the air duct cavity;

[0013] The sound absorption assembly is located in the air duct cavity, and the sound absorption assembly and the inner wall of the shell form at least two sound absorption cavities, and the at least two sound absorption cavities are arranged in the air duct cavity.

[0014] In some embodiments, the housing comprises a first housing, the fan blade is mounted to the first housing;

[0015] The sound absorption assembly comprises a first sound absorption part and a second sound absorption part, the first sound absorption part is located upstream of the second sound absorption part along the flow direction of the fluid, and the first sound absorption part, the second sound absorption part and the first housing enclose a first sound absorption cavity.

[0016] In some embodiments, the housing further comprises a second housing, the second housing is connected to the first housing, the second housing and the first housing enclose an air duct cavity, and the second housing is spaced apart from the fan blade;

[0017] The sound absorption assembly further comprises a third sound absorption part and a fourth sound absorption part, the third sound absorption part is located upstream of the fourth sound absorption part along the flow direction of the fluid, and the third sound absorption part, the fourth sound absorption part and the second housing enclose a second sound absorption cavity.

[0018] In some embodiments, the first sound absorption cavity and the second sound absorption cavity are oppositely arranged along a direction intersecting the flow direction of the fluid.

[0019] In some embodiments, a plurality of first sound absorption cavities are provided, and the plurality of first sound absorption cavities are spaced apart along the flow direction of the fluid.

[0020] And / or, a plurality of second sound absorption cavities are provided, and the plurality of second sound absorption cavities are spaced apart along the flow direction of the fluid.

[0021] In some embodiments, a first end of the first sound absorption part is arranged at the first housing, a second end of the first sound absorption part extends into the air duct cavity, a first end of the second sound absorption part is arranged at the first housing, and a second end of the second sound absorption part extends into the air duct cavity, the second end of the first sound absorption part and the second end of the second sound absorption part are oppositely directed.

[0022] In some embodiments, a first end of the third sound absorption part is arranged at the second housing, a second end of the third sound absorption part extends into the air duct cavity, a first end of the fourth sound absorption part is arranged at the second housing, and a second end of the fourth sound absorption part extends into the air duct cavity, the second end of the third sound absorption part and the second end of the fourth sound absorption part are oppositely directed.

[0023] In some embodiments, the second housing comprises:

[0024] a first housing part;

[0025] a second housing part connected to a side of the first housing part away from the air outlet, the second housing part is annularly arranged at the outer periphery of the fan blade and is spaced apart from the fan blade;

[0026] the third sound absorption part is arranged at an end of the second housing part away from the air outlet, the fourth sound absorption part is arranged at the first housing part, and the third sound absorption part, the fourth sound absorption part, the first housing part and the second housing part jointly enclose the second sound absorption cavity.

[0027] In some embodiments, the second housing includes:

[0028] First shell section;

[0029] The second housing is connected to the side of the first housing away from the air outlet. The second housing is arranged around the outer periphery of the fan blade and is spaced apart from the fan blade.

[0030] Guide bone, located in the second shell portion;

[0031] Multiple guide bones are provided, and the multiple guide bones are arranged at intervals along the circumference of the second shell. Two adjacent guide bones and the second shell enclose the third sound-absorbing cavity.

[0032] In some implementations, it also includes:

[0033] The drive unit is mounted on the housing and is connected to the fan blade drive. The drive unit is used to drive the fan blade to rotate.

[0034] In this bladeless fan structure, the casing and blades allow air from outside the casing to be drawn into the air duct cavity through the inlet, accelerated by the blades, and then delivered to the outlet. By incorporating sound-absorbing components, at least two sound-absorbing cavities are formed within the casing's inner wall, reducing internal noise. Increasing the number of sound-absorbing cavities further reduces internal noise. The at least two sound-absorbing cavities spaced apart within the air duct cavity allow for their arrangement along the cavity's length, maximizing the utilization of the internal space.

[0035] Therefore, the bladeless fan provided in this application can solve the problem of high noise in bladeless fans. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 One of the schematic diagrams of the main structure of the bladeless fan provided in the embodiments of this application;

[0038] Figure 2 Provided for the embodiments of this application Figure 1 Sectional view of AA in the diagram;

[0039] Figure 3 A second schematic diagram of the main structure of the bladeless fan provided in the embodiments of this application;

[0040] Figure 4 A cross-sectional view of B-B in Figure 1 provided by the embodiments of the present application.

[0041] Figure 5 A schematic view of the connection structure of the second shell part and the bone guide provided by the embodiments of the present application.

[0042] Explanation of reference signs:

[0043] 100 - shell; 101 - first shell; 102 - second shell; 1021 - first shell part; 1022 - second shell part; 1023 - bone guide;

[0044] 200 - fan blade;

[0045] 300 - sound absorption assembly; 301 - first sound absorption part; 302 - second sound absorption part; 303 - third sound absorption part; 304 - fourth sound absorption part;

[0046] 400 - driving member;

[0047] 500 - air duct cavity; 501 - air inlet; 502 - air outlet;

[0048] 600 - first sound absorption cavity;

[0049] 700 - second sound absorption cavity;

[0050] 800 - third sound absorption cavity. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0052] A bladeless fan refers to a fan without exposed rotating blades. The impeller of the bladeless fan is located inside the shell of the bladeless fan, the shell is provided with an air inlet and an air outlet, and the inside of the shell is provided with a flow channel. Through the air inlet on the shell, the air around the shell can be sucked into the inside of the shell through the impeller and transported to the air outlet on the shell through the flow channel inside the shell.

[0053] In the related art, the air of the impeller rotating at high speed is accelerated, and the accelerated air generates vortex and airflow friction in the inside of the shell, resulting in noise of the bladeless fan, and the motor connected with the impeller also generates mechanical noise during operation.

[0054] In order to overcome the defects in the prior art, by setting the shell and the fan blade, the fan blade can suck the air outside the shell into the inside of the air duct cavity through the air inlet, and then deliver it to the air outlet side after acceleration. By setting the sound absorbing assembly, the sound absorbing assembly and the inner wall of the shell can form at least two sound absorbing cavities to reduce the noise inside the bladeless fan. By increasing the number of sound absorbing cavities, the utilization rate of the internal space of the air duct cavity can be further improved.

[0055] Therefore, the bladeless fan provided by the present application can solve the problem of high noise of the bladeless fan.

[0056] The content of the present application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the content of the present application.

[0057] As shown in Figure 1 and Figure 2 The present application provides a bladeless fan, which comprises a shell 100, a fan blade 200 and a sound absorbing assembly 300. The shell 100 has an air duct cavity 500, an air inlet 501 and an air outlet 502 which communicate with the air duct cavity 500 respectively, the fan blade 200 is rotatably arranged in the air duct cavity 500, and the sound absorbing assembly 300 is located in the air duct cavity 500. The sound absorbing assembly 300 and the inner wall of the shell 100 form at least two sound absorbing cavities, and the at least two sound absorbing cavities are arranged in the air duct cavity 500.

[0058] It should be noted that the specific number of the at least two sound absorbing cavities can be two, three, four, five or other values, which is not limited here and can be selected according to actual use requirements.

[0059] It should be noted that when the sound absorbing cavity is provided with two sound absorbing cavities, the two sound absorbing cavities can be two first sound absorbing cavities 600, two second sound absorbing cavities 700, one first sound absorbing cavity 600 and one second sound absorbing cavity 700, or any combination of other modes, which is not limited here and can be selected according to actual use requirements.

[0060] Further, when the number of sound absorbing cavities is greater than two, the sound absorbing cavities can be any combination of the above sound absorbing cavities, which is not limited here and can be selected according to actual use requirements.

[0061] The specific structure of the bladeless fan and various possible embodiments will be described in detail below.

[0062] It should be noted that the bladeless fan provided by the embodiments of the present application can be a handheld bladeless fan, or a vertical bladeless fan, or a table type bladeless fan. This is not limited here, and can be selected according to actual use requirements.

[0063] The shell 100 provided by the present application includes a first shell 101, and the fan blade 200 is mounted on the first shell 101. The sound absorbing assembly 300 includes a first sound absorbing part 301 and a second sound absorbing part 302. In the flow direction of the fluid, the first sound absorbing part 301 is located upstream of the second sound absorbing part 302. The first sound absorbing part 301, the second sound absorbing part 302, and the first shell 101 form a first sound absorbing cavity 600.

[0064] It should be noted that the air inlet 501, the air duct cavity 500, and the air outlet 502 are sequentially communicated.

[0065] It should be noted that the flow direction of the fluid refers to that the fluid enters the inside of the air duct cavity 500 after passing through the air inlet 501, and flows to the air outlet 502 after passing through the air duct cavity 500.

[0066] It should be noted that in the flow direction of the fluid, the first sound absorbing part 301 is located upstream of the second sound absorbing part 302, which means that in the flow direction of the fluid, the first sound absorbing part 301 is located on the side relatively close to the air inlet 501, and the second sound absorbing part 302 is located on the side relatively close to the air outlet 502, that is, the first sound absorbing part 301 is located on the side of the second sound absorbing part 302 away from the air outlet 502.

[0067] It should be noted that the noise generated inside the bladeless fan resonates in the first sound absorbing cavity 600 after entering the first sound absorbing cavity 600, so as to convert the sound energy into heat energy or other forms of energy and dissipate it, thereby reducing the internal noise of the bladeless fan.

[0068] The first end of the first sound absorbing part 301 is arranged at the first shell 101, and the second end of the first sound absorbing part 301 extends into the air duct cavity 500. The first end of the second sound absorbing part 302 is arranged at the first shell 101, and the second end of the second sound absorbing part 302 extends into the air duct cavity 500. The second end of the first sound absorbing part 301 and the second end of the second sound absorbing part 302 are opposite to each other.

[0069] It should be noted that in some embodiments, the fluid in the air duct cavity 500 adheres to the surface of the side of the first sound absorbing part 301 away from the second sound absorbing part 302. In this case, the first sound absorbing part 301 can play a role in guiding the flow of the fluid in the air duct cavity 500.

[0070] It can be understood that the second end of the first sound absorption part 301 and the second end of the second sound absorption part 302 face each other, so that the interval between the second end of the first sound absorption part 301 and the second end of the second sound absorption part 302 forms a hole communicating with the first sound absorption cavity 600, and the diameter of the hole in the direction from the hole to the bottom wall of the first sound absorption cavity 600 is smaller than the inner diameter of the first sound absorption cavity 600, so that the first sound absorption cavity 600 and the hole cooperate to form a cavity resonance sound absorption structure, so that the noise in the air duct cavity 500 can be effectively absorbed.

[0071] In the related art, the cavity resonance sound absorption structure refers to a structure that is closed with a certain cavity and is in communication with the sound field space through a small hole with a certain depth.

[0072] It should be noted that the sound absorption principle of the cavity resonance sound absorption structure is that when the frequency of the sound wave is consistent with the natural frequency of the cavity resonance sound absorption structure, resonance occurs, the sound wave excites the cavity resonance sound absorption structure to produce vibration, and the amplitude reaches the maximum, so that the sound energy is consumed, and the purpose of sound absorption is achieved.

[0073] The shell 100 provided in the application further comprises a second shell 102, the second shell 102 is connected with the first shell 101, the second shell 102 and the first shell 101 enclose to form the air duct cavity 500, and the second shell 102 is spaced apart from the fan blade 200.

[0074] It can be understood that through the split setting between the first shell 101 and the second shell 102, the arrangement difficulty of the air duct cavity 500 can be reduced. And in the process of installing the bladeless fan, the fan blade 200 can be installed to the first shell 101, and then the second shell 102 is installed to the first shell 101, so that the installation difficulty between the fan and the air duct cavity 500 can be reduced, and the second shell 102 is spaced apart from the fan blade 200, so that the interference between the second shell 102 and the fan blade 200 under the working condition of the fan blade 200 can be reduced.

[0075] The sound absorption assembly 300 provided in the application further comprises a third sound absorption part 303 and a fourth sound absorption part 304, the third sound absorption part 303 is located upstream of the fourth sound absorption part 304 along the flow direction of the fluid, and the third sound absorption part 303, the fourth sound absorption part 304 and the second shell 102 enclose to form a second sound absorption cavity 700.

[0076] It should be noted that along the flow direction of the fluid, the third sound absorption part 303 is located upstream of the fourth sound absorption part 304, that is, along the flow direction of the fluid, in the third sound absorption part 303 and the fourth sound absorption part 304, the third sound absorption part 303 is located on the side relatively close to the air inlet 501, and the fourth sound absorption part 304 is located on the side relatively close to the air outlet 502, that is, the third sound absorption part 303 is located on the side away from the air outlet 502 of the fourth sound absorption part 304.

[0077] It can be understood that, after the noise generated inside the bladeless fan enters the second sound absorption cavity 700, the sound waves resonate in the second sound absorption cavity 700, so that the sound energy is converted into heat energy or other forms of energy dissipation, thereby reducing the internal noise of the bladeless fan.

[0078] The first end of the third sound absorption part 303 is arranged on the second shell 102, and the second end of the third sound absorption part 303 extends into the air duct cavity 500. The first end of the fourth sound absorption part 304 is arranged on the second shell 102, and the second end of the fourth sound absorption part 304 extends into the air duct cavity 500. The second end of the third sound absorption part 303 and the second end of the fourth sound absorption part 304 are oppositely directed.

[0079] It should be noted that, in some embodiments, the fluid in the air duct cavity 500 adheres to the surface of the third sound absorption part 303 away from the fourth sound absorption part 304. In this case, the third sound absorption part 303 can guide the flow of the fluid in the air duct cavity 500.

[0080] It can be understood that, the second end of the third sound absorption part 303 and the second end of the fourth sound absorption part 304 are oppositely directed, so that the interval between the second end of the third sound absorption part 303 and the second end of the fourth sound absorption part 304 forms a hole communicating with the second sound absorption cavity 700. The diameter of the hole in the direction from the hole to the bottom wall of the second sound absorption cavity 700 is smaller than the inner diameter of the second sound absorption cavity 700. The second sound absorption cavity 700 and the hole can form a cavity resonance sound absorption structure, so that the noise in the air duct cavity 500 can be effectively absorbed.

[0081] It should be noted that, the first sound absorption cavity 600 and the second sound absorption cavity 700 are oppositely arranged in a direction intersecting the flow direction of the fluid.

[0082] It can be understood that, the first sound absorption cavity 600 and the second sound absorption cavity 700 are oppositely arranged in a direction intersecting the flow direction of the fluid, which can optimize the space occupation of the first sound absorption cavity 600 and the second sound absorption cavity 700, and improve the utilization rate of the internal space of the air duct cavity 500.

[0083] It should be noted that, oppositely arranged means that the opening end of the first sound absorption cavity 600 is oppositely directed to the opening end of the second sound absorption cavity 700.

[0084] It should be noted that, the direction intersecting the flow direction of the fluid can be any degree from 0° to 180°, which is not limited herein and can be selected according to actual use requirements.

[0085] It should be noted that the first sound absorption cavity 600 and the second sound absorption cavity 700 have a plurality of different setting numbers, and the setting numbers of the first sound absorption cavity 600 and the second sound absorption cavity 700 will be illustrated in turn below.

[0086] In a feasible implementation, the first sound absorption cavity 600 is provided in plurality, and the plurality of first sound absorption cavities 600 are arranged at intervals along the flow direction of the fluid.

[0087] It can be understood that increasing the setting number of the first sound absorption cavity 600 can further reduce the internal noise of the bladeless fan, and the first sound absorption cavity 600 can be arranged along the flow direction of the air duct cavity 500 to improve the utilization rate of the internal space of the air duct cavity 500.

[0088] In another feasible implementation, the second sound absorption cavity 700 is provided in plurality, and the plurality of second sound absorption cavities 700 are arranged at intervals along the flow direction of the fluid.

[0089] It can be understood that increasing the setting number of the second sound absorption cavity 700 can further reduce the internal noise of the bladeless fan, and the second sound absorption cavity 700 can be arranged along the flow direction of the air duct cavity 500 to improve the utilization rate of the internal space of the air duct cavity 500.

[0090] In addition, in another feasible implementation, the first sound absorption cavity 600 is provided in plurality, and the plurality of first sound absorption cavities 600 are arranged at intervals along the flow direction of the fluid; and the second sound absorption cavity 700 is provided in plurality, and the plurality of second sound absorption cavities 700 are arranged at intervals along the flow direction of the fluid.

[0091] It can be understood that increasing the setting number of the first sound absorption cavity 600 can further reduce the internal noise of the bladeless fan, and the first sound absorption cavity 600 can be arranged along the flow direction of the air duct cavity 500 to improve the utilization rate of the internal space of the air duct cavity 500. Increasing the setting number of the second sound absorption cavity 700 can further reduce the internal noise of the bladeless fan, and the second sound absorption cavity 700 can be arranged along the flow direction of the air duct cavity 500 to improve the utilization rate of the internal space of the air duct cavity 500.

[0092] It can be understood that the setting number of the first sound absorption cavity 600 and the second sound absorption cavity 700 is not limited, and can be selected according to actual use requirements.

[0093] Further, the plurality in the above implementation can be two, three, four, five or other incremental integers, which are not limited here and can be selected according to actual use requirements or the length along the flow direction of the air duct cavity 500.

[0094] It should be noted that the second shell 102 can be a split structure or an integrated structure, which is not limited here and can be selected according to actual use requirements.

[0095] As shown in Figure 1 and Figure 2 , the following embodiment of the second shell 102 using an integrated structure is exemplified.

[0096] It should be noted that the second shell 102 includes a first shell part 1021 and a second shell part 1022, the second shell part 1022 is connected to the side of the first shell part 1021 away from the air outlet 502, the second shell part 1022 is annularly arranged on the outer periphery of the fan blade 200 and is spaced apart from the fan blade 200.

[0097] It should be noted that the first shell part 1021 is connected to the first shell 101.

[0098] It should be noted that the second shell part 1022 is located in the air duct cavity 500.

[0099] It can be understood that the first shell part 1021 and the second shell part 1022 are integrally arranged, which can reduce the molding steps of the second shell 102 and form a relatively more complete second sound absorption cavity 700.

[0100] It should be noted that the third sound absorption part 303 is arranged at one end of the second shell part 1022 away from the air outlet 502, and the fourth sound absorption part 304 is arranged at the first shell part 1021. The third sound absorption part 303, the fourth sound absorption part 304, the first shell part 1021, and the second shell part 1022 jointly enclose the second sound absorption cavity 700.

[0101] As shown in Figure 3 and Figure 4 , the following embodiment of the second shell 102 using a split structure is exemplified.

[0102] It should be noted that the second shell 102 includes a first shell part 1021 and a second shell part 1022, the second shell part 1022 is connected to the side of the first shell part 1021 away from the air outlet 502, the second shell part 1022 is annularly arranged on the outer periphery of the fan blade 200 and is spaced apart from the fan blade 200.

[0103] It should be noted that the first shell part 1021 is connected to the first shell 101.

[0104] It should be noted that the second shell part 1022 is located in the air duct cavity 500.

[0105] It can be understood that the first shell part 1021 and the second shell part 1022 are separately arranged, which can improve the arrangement flexibility of the second shell 102, and can facilitate adaptive adjustment of the second shell part 1022 according to different selected models or types of the fan blade 200, so as to improve the arrangement flexibility of the bladeless fan.

[0106] It should be noted that the third sound absorbing part 303 is arranged at one end of the second shell part 1022 away from the air outlet 502, and the fourth sound absorbing part 304 is arranged on the first shell part 1021. The third sound absorbing part 303, the fourth sound absorbing part 304, the first shell part 1021 and the second shell part 1022 jointly form the second sound absorbing cavity 700.

[0107] It can be understood that the second sound absorbing cavity 700 is jointly formed by the third sound absorbing part 303, the fourth sound absorbing part 304, the first shell part 1021 and the second shell part 1022, which can make the arrangement of the second sound absorbing cavity 700 more flexible.

[0108] As shown in Figure 5 It can be understood that the third sound absorbing cavity 800 is jointly formed by the third sound absorbing part 303, the fourth sound absorbing part 304, the first shell part 1021 and the second shell part 1022, which can make the arrangement of the second sound absorbing cavity 700 more flexible.

[0109] It can be understood that the third sound absorbing cavity 800 is jointly formed by the third sound absorbing part 303, the fourth sound absorbing part 304, the first shell part 1021 and the second shell part 1022, which can make the arrangement of the second sound absorbing cavity 700 more flexible.

[0110] The bladeless fan provided by the embodiment of the present application further comprises a driving member 400, which is installed on the shell 100 and is in transmission connection with the fan blade 200. The driving member 400 is used to drive the fan blade 200 to rotate.

[0111] It can be understood that the driving member 400 is arranged, so that the fan blade 200 can rotate relative to the air duct cavity 500 under the driving of the driving member 400, so that the fluid in the air duct cavity 500 can be transported to the air outlet 502 along the air duct cavity 500.

[0112] It should be noted that a reference to "one embodiment," "an embodiment," "example embodiment," "some embodiments," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0113] In general, terminology can be understood at least in part from usage in context. For example, terms, such as "one or more" as used herein, can be understood as describing any feature, structure, or characteristic in a singular or multiple sense, depending at least in part on the context in which the term is used. Similarly, terms, such as "a," "an," or "the," again can be understood as describing either a singular or plural number of any feature, structure, or characteristic, depending at least in part on the context in which the term is used.

[0114] It will be readily understood that the terms "on," "above," and "over," as used herein, should not be construed as limiting the location of one element relative to another, but rather should be construed as indicating a relative position at a distance above, below, or in any other direction relative to another element. Further, it will be readily understood that the terms "on," "above," and "over," as used herein, should not be construed as limiting the location of one element relative to another, but rather should be construed as indicating a relative position at a distance above, below, or in any other direction relative to another element.

[0115] Further, spatially relative terms, such as "beneath," "below," "lower," "above," "upper," and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90° or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0116] Finally, it should be noted that the above-described embodiments are merely exemplary of the application and should not be used in a manner to limit the scope of the application. Those skilled in the art will be able to make modifications and / or substitutions for elements disclosed without departing from the scope of the application.

Claims

1. A bladeless fan, characterized by, The application relates to a shell (100) with an air duct cavity (500), an air inlet (501) and an air outlet (502) respectively communicating with the air duct cavity (500), a fan blade (200) rotatably arranged in the air duct cavity (500), and an acoustic absorption assembly (300) arranged in the air duct cavity (500) and surrounded by the inner wall of the shell (100) to form at least two acoustic absorption cavities. The shell (100) comprises a first shell (101), and the fan blade (200) is mounted on the first shell (101). The acoustic absorption assembly (300) comprises a first acoustic absorption part (301) and a second acoustic absorption part (302), the first acoustic absorption part (301) is located upstream of the second acoustic absorption part (302) along the flow direction of fluid, and the first acoustic absorption part (301), the second acoustic absorption part (302) and the first shell (101) form a first acoustic absorption cavity (600). The shell (100) further comprises a second shell (102) connected with the first shell (101), the second shell (102) and the first shell (101) form the air duct cavity (500), and the second shell (102) is arranged in a spaced manner with the fan blade (200).

2. The bladeless fan of claim 1, wherein, The acoustic absorption assembly (300) further comprises a third acoustic absorption part (303) and a fourth acoustic absorption part (304), the third acoustic absorption part (303) is located upstream of the fourth acoustic absorption part (304) along the flow direction of fluid, and the third acoustic absorption part (303), the fourth acoustic absorption part (304) and the second shell (102) form a second acoustic absorption cavity (700). The first acoustic absorption cavity (600) and the second acoustic absorption cavity (700) are arranged in a spaced manner along a direction intersecting the flow direction of fluid.

3. The bladeless fan of claim 2, wherein, The first acoustic absorption cavity (600) is provided with a plurality of first acoustic absorption cavities (600) arranged in a spaced manner along the flow direction of fluid. The first end of the first acoustic absorption part (301) is arranged on the first shell (101), the second end of the first acoustic absorption part (301) extends into the air duct cavity (500), the first end of the second acoustic absorption part (302) is arranged on the first shell (101), the second end of the second acoustic absorption part (302) extends into the air duct cavity (500), and the second end of the first acoustic absorption part (301) and the second end of the second acoustic absorption part (302) face each other.

4. The bladeless fan of claim 3, wherein, ​ 5. The bladeless fan of claim 3, wherein, ​ ​ 6. The bladeless fan of claim 2, wherein, ​ 7. The bladeless fan of claim 3, wherein, The first end of the third sound absorbing part (303) is arranged on the second shell (102), the second end of the third sound absorbing part (303) extends into the air duct cavity (500), the first end of the fourth sound absorbing part (304) is arranged on the second shell (102), the second end of the fourth sound absorbing part (304) extends into the air duct cavity (500), and the second end of the third sound absorbing part (303) and the second end of the fourth sound absorbing part (304) are opposite to each other.

8. The bladeless fan of claim 3, wherein, The second shell (102) comprises: a first shell part (1021); a second shell part (1022) connected to one side of the first shell part (1021) away from the air outlet (502), the second shell part (1022) is arranged around the outer periphery of the fan blade (200) and is spaced apart from the fan blade (200); the third sound absorbing part (303) is arranged at one end of the second shell part (1022) away from the air outlet (502), the fourth sound absorbing part (304) is arranged on the first shell part (1021), and the third sound absorbing part (303), the fourth sound absorbing part (304), the first shell part (1021) and the second shell part (1022) jointly form the second sound absorbing cavity (700).

9. The bladeless fan of claim 3, wherein, The second shell (102) comprises: a first shell part (1021); a second shell part (1022) connected to one side of the first shell part (1021) away from the air outlet (502), the second shell part (1022) is arranged around the outer periphery of the fan blade (200) and is spaced apart from the fan blade (200); a guide bone (1023) arranged on the second shell part (1022); The guide bone (1023) is provided with a plurality of guide bones (1023), and the plurality of guide bones (1023) are arranged along the circumference of the second shell part (1022), and two adjacent guide bones (1023) and the second shell part (1022) form a third sound absorbing cavity (800).

10. The bladeless fan of any one of claims 1-9, wherein, Further comprising: a driving member (400) mounted on the shell (100) and in transmission connection with the fan blade (200), the driving member (400) is used for driving the fan blade (200) to rotate.

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