Bladeless fan

Abstract

The utility model relates to the technical field of bladeless fans, and provides a bladeless fan which comprises a first shell, a second shell and an impeller. Wherein the second shell is connected to the first shell, an air channel cavity is defined by the second shell and the first shell, the air channel cavity is composed of at least two continuous and steering flow channel sections, and an air inlet and an air outlet are formed in the two ends of the air channel cavity; the impeller is rotatably arranged in the flow channel sections, and airflow flows through the air inlet, the two flow channel sections and the air outlet. The bladeless fan can solve the problem that the use experience of a user becomes poor due to the fact that air outlet of the bladeless fan is not uniform.

Description

[0001] The present 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] The present application claims priority to the patent application No. 202423297651.X, filed on December 27, 2024, entitled "Bladeless Fan", the content of which is incorporated herein by reference in its entirety;

[0003] The present application claims priority to the patent application No. 202520076459.3, filed on January 13, 2025, entitled "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 bladeless fan sprays air from an air outlet to form a stable air flow by accelerating the air with the impeller and the flow guide device.

[0006] When the bladeless fan is running, it sucks air from an air inlet and sprays the air from an air outlet.

[0007] In the related art, the bladeless fan has the problem of uneven air outlet, which leads to poor user experience. SUMMARY

[0008] The present application provides a bladeless fan, which can solve the problem of uneven air outlet of the bladeless fan, which leads to poor user experience.

[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] a first shell;

[0012] a second shell connected to the first shell, the second shell and the first shell enclosing a wind channel cavity, the wind channel cavity being composed of at least two continuous and turning flow channel segments, and the two ends of the wind channel cavity being an air inlet and an air outlet;

[0013] an impeller rotatably arranged in the flow channel segment, and the airflow flowing through the air inlet, the two flow channel segments and the air outlet.

[0014] In some embodiments, the two flow channel sections include a first flow channel section and a second flow channel section connected in sequence;

[0015] The outer wall of the first shell and the inner wall of the second shell enclose the second flow channel section, and the part connecting the air inlet and the second flow channel section defines the first flow channel section;

[0016] The extension direction of at least part of the first flow channel section intersects with the extension direction of at least part of the second flow channel section.

[0017] In some embodiments, the first flow channel section is a curved section;

[0018] And / or, the second flow channel section is a curved section.

[0019] In some embodiments, the second shell includes a first part and a second part connected;

[0020] The first shell has an opening communicating with the air duct cavity, and the opening includes a first opening area and a second opening area, and the first opening area is annularly arranged outside the second opening area;

[0021] The first part is annularly arranged outside the outer periphery of the first shell; the second part covers the first opening area, and the second part forms the air inlet corresponding to the position of the second opening area.

[0022] In some embodiments, the second part extends into the air duct cavity through the opening and is spaced apart from the inner wall of the first shell;

[0023] Or, the second part extends axially to the opening;

[0024] Or, the second part is located outside the opening and the air duct cavity, and the second part is spaced apart from the opening, and the axial orthographic projection of part of the second part is located inside the axial orthographic projection of the opening.

[0025] In some embodiments, further comprising:

[0026] A third shell connected to the second shell away from the first shell in the axial direction of the impeller;

[0027] The third shell and the second shell enclose a third flow channel section;

[0028] The third flow channel section communicates with the first flow channel section.

[0029] In some embodiments, the third flow channel section is a curved section;

[0030] And / or, the third flow channel section is a straight section.

[0031] In some embodiments, the end of the second flow channel section forms an air outlet;

[0032] The outer diameter of the first shell relatively closer to the air outlet is greater than the outer diameter of the first shell relatively farther from the air outlet along the direction of the air outlet path.

[0033] In some embodiments, the impeller is a centrifugal impeller or a mixed flow impeller.

[0034] In some embodiments, the fan further comprises:

[0035] The driving member is arranged in the first shell and is in driving connection with the impeller, and the driving member is configured to drive the impeller to rotate.

[0036] The bladeless fan with the above structure can form an air duct cavity by the first shell and the second shell, accelerate airflow in the flow passage segment by the impeller, and make the airflow in the air duct cavity flow along at least two flow passage segments and turn at the two turning flow passage segments, so that the airflow accelerated by the impeller can be mixed and then blown out of the air outlet to the outside, so that the flow rate of the airflow blown out of the air outlet is more uniform.

[0037] Therefore, the bladeless fan provided by the application can solve the problem of non-uniform air outlet of the bladeless fan, thereby improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 A main structure schematic diagram of the bladeless fan provided by the embodiments of the present application;

[0040] Figure 2 A main structure schematic diagram of the bladeless fan provided by the embodiments of the present application; Figure 1 A sectional view of A-A section in the above embodiment;

[0041] Figure 3 A main structure schematic diagram of the bladeless fan provided by the embodiments of the present application;

[0042] Figure 4 A main structure schematic diagram of the bladeless fan provided by the embodiments of the present application; Figure 3 A sectional view of B-B section in the above embodiment;

[0043] Figure 5 A main structure schematic diagram of the bladeless fan provided by the embodiments of the present application;

[0044] Figure 6 The embodiments of the present application provide Figure 5 A sectional view of a C-C cross section in the embodiments of the present application.

[0045] Explanation of reference signs:

[0046] 100 - first shell; 101 - first opening area; 102 - second opening area;

[0047] 200 - second shell; 201 - first part; 202 - second part; 203 - third part;

[0048] 300 - impeller; 301 - centrifugal impeller; 302 - mixed flow impeller;

[0049] 400 - third shell;

[0050] 500 - driving member;

[0051] 600 - air duct cavity; 601 - air inlet; 602 - first flow passage section; 6021 - third flow passage section; 603 - second flow passage section; 604 - air outlet. DETAILED DESCRIPTION

[0052] 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 below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. 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 scope of protection of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0053] It should be noted that the bladeless fan refers to a fan without exposed rotating blades.

[0054] In the related art, the impeller of the bladeless fan is located inside the shell of the bladeless fan, and an air inlet and an air outlet are formed on the shell. The air inlet is located at the rear of the shell, and the air outlet is located at the front of the shell. Through the air inlet on the shell, air outside the rear of the shell can be sucked into the inside of the shell through the impeller, and after being accelerated by the high-speed rotating impeller, the air is blown out through the air outlet at the front of the shell.

[0055] It should be noted that the bladeless fan with the above structure has the problem of uneven air outlet.

[0056] Further, the uneven air outlet can be a combination of one or more of uneven air flow, existence of a strong air outlet area, and existence of a weak air outlet area, which is not limited herein. The uneven air outlet of the bladeless fan will result in poor user experience.

[0057] In order to overcome the defects in the prior art, by arranging the first shell and the second shell, the first shell and the second shell can be arranged to form an air duct cavity; by arranging the impeller, the impeller can drive the airflow in the flow passage section to accelerate; by arranging at least two continuous and turning flow passage sections to form the air duct cavity, the airflow in the air duct cavity can flow along at least two flow passage sections, and the two turning flow passage sections can form a turning, so that the airflow accelerated by the impeller can be mixed and then blown out to the outside through the air outlet, so that the flow rate of the airflow blown out by the air outlet is more uniform.

[0058] Therefore, the bladeless fan provided by the application can solve the problem of uneven air outlet of the bladeless fan, which leads to poor user experience.

[0059] As shown in Figure 1 and Figure 2 The application provides a bladeless fan, which comprises a first shell 100, a second shell 200 and an impeller 300. The second shell 200 is connected to the first shell 100, and the second shell 200 and the first shell 100 form an air duct cavity 600. The air duct cavity 600 is composed of at least two continuous and turning flow passage sections, and the two ends of the air duct cavity 600 are an air inlet 601 and an air outlet 604. The impeller 300 is rotatably arranged in the flow passage section, and the airflow flows through the air inlet 601, the two flow passage sections and the air outlet 604.

[0060] The specific structure of the bladeless fan and various possible embodiments are described in detail below.

[0061] It should be noted that the bladeless fan provided by the embodiments of the application can be a handheld bladeless fan, or a vertical bladeless fan, or a table type bladeless fan. This is not limited, and can be selected according to actual use requirements.

[0062] The two flow passage sections provided by the embodiments of the application comprise a first flow passage section 602 and a second flow passage section 603 which are sequentially connected. The outer wall of the first shell 100 and the inner wall of the second shell 200 form the second flow passage section 603. The part connecting the air inlet 601 and the second flow passage section 603 is defined as the first flow passage section 602. The extension direction of at least part of the first flow passage section 602 intersects with the extension direction of at least part of the second flow passage section 603.

[0063] It can be understood that by setting the first flow channel section and the second flow channel section, the airflow can flow along the first flow channel section and the second flow channel section. By enclosing the second flow channel section 603 by the outer wall of the first shell 100 and the inner wall of the second shell 200, the difficulty of opening the second flow channel section 603 can be reduced. By defining the part of the communication air inlet 601 and the second flow channel section 603 as the first flow channel section 602, the first flow channel section 602 can be in communication with the air inlet 601 and the second flow channel section 603, respectively. By intersecting the extension direction of at least part of the first flow channel section 602 with the extension direction of at least part of the second flow channel section 603, the intersection between the first flow channel section 602 and the second flow channel section 603 exists, so that the airflow accelerated by the impeller 300 can be mixed through the first flow channel section 602 and the second flow channel section 603, and then blown out to the outside through the air outlet 604, so that the flow rate of the airflow blown out by the air outlet 604 is more uniform.

[0064] It should be noted that the airflow flows in the direction of the air inlet 601, the first flow channel section 602, the second flow channel section 603, and the air outlet 604 in sequence.

[0065] It should be noted that the included angle between the extension direction of at least part of the first flow channel section 602 and the extension direction of at least part of the second flow channel section 603 can be any degree between 0° and 180°, which is not limited herein and can be selected according to actual use requirements.

[0066] It should be noted that the first flow channel section 602 and the second flow channel section 603 provided by the embodiments of the present application have various different setting modes, which will be illustrated in sequence below.

[0067] In an embodiment, the first flow channel section 602 is a curved section.

[0068] It can be understood that the setting of the curved section can improve the mixing of the airflow, and the bending can cause secondary flow of the airflow, which is helpful to enhance the mixing effect of the airflow, and can facilitate accurate adjustment of the flow direction of the airflow to facilitate control of the first flow channel section 602.

[0069] It should be noted that in the case where the first flow channel section 602 is a curved section, the second flow channel section 603 can be a straight section or an irregularly shaped section, which is not limited herein and can be selected according to actual use requirements.

[0070] In an embodiment, the second flow channel section 603 is a curved section.

[0071] Understandably, the setting of the curved section can improve the mixing of airflow, and the curvature will cause secondary flow of airflow, which helps to enhance the mixing effect of airflow. It also makes it convenient to make precise adjustment of the flow direction of airflow, so as to control the second flow channel section 603.

[0072] It should be noted that when the second flow channel section 603 is a curved section, the first flow channel section 602 can be a straight section or an irregularly shaped section. There are no restrictions here, and it can be selected according to the actual use requirements.

[0073] In one embodiment, the first flow channel section 602 is a curved section, and the second flow channel section 603 is a curved section.

[0074] Understandably, the curved section enhances airflow mixing, and the bend causes secondary airflow, further strengthening the mixing effect. It also allows for precise adjustment of the airflow direction, facilitating control of the first flow channel section 602 and the second flow channel section 603. Furthermore, two consecutive bends further enhance the mixing effect, resulting in a more uniform airflow velocity within the first and second flow channel sections 602 and 603.

[0075] It is understandable that there are no restrictions on the setting of the first flow channel section 602 and the second flow channel section 603, and they can be selected according to actual usage requirements.

[0076] like Figure 3 and Figure 4 As shown, the second housing 200 provided in the embodiment of this application includes a first part 201 and a second part 202 connected together; the first housing 100 has an opening communicating with the air duct cavity 600, the opening including a first opening area 101 and a second opening area 102, the first opening area 101 being disposed around the outer periphery of the second opening area 102; the first part 201 being disposed around the outer periphery of the first housing 100; the second part 202 covering the first opening area 101, and the second part 202 forming an air inlet 601 corresponding to the position of the second opening area 102.

[0077] It is understandable that by encircling the first part 201 around the outer periphery of the first housing 100, the first part 201 and the outer wall of the first housing 100 can form the second flow channel section 603, which can reduce the processing difficulty of the second flow channel section 603.

[0078] Furthermore, this method allows the gap between the end of the first part 201 facing away from the second part 202 and the outer wall of the first housing 100 to form an air outlet 604, thereby allowing the second flow channel section 603 to communicate with the outside of the first housing 100 through the air outlet 604.

[0079] Further, in this way, the air outlet 604 is arranged around the outer periphery of the first shell 100 and between the first shell 100 and the second shell 200.

[0080] It can be understood that the air outlet 604 is arranged around the outer periphery of the first shell 100, which can increase the setting area of the air outlet 604, so that the distribution area of the airflow blown by the bladeless fan is larger. The air outlet 604 is located between the first shell 100 and the second shell 200, which can reduce the difficulty of opening the air outlet 604, and can prevent the user from directly observing or touching the impeller 300 from the outside of the bladeless fan. In the case of increasing the aesthetic appearance of the bladeless fan, the safety performance of the bladeless fan can be improved.

[0081] It can be understood that the second part 202 covers the first opening area 101, and the second part 202 forms the air inlet 601 at the position corresponding to the second opening area 102, which can reduce the difficulty of opening the air inlet 601.

[0082] In the bladeless fan provided by the embodiments of the present application, the second part 202 has a plurality of different setting positions, which will be described in turn.

[0083] In one embodiment, the second part 202 extends into the air duct cavity 600 through the opening and is arranged spaced apart from the inner wall of the first shell 100.

[0084] It can be understood that the first flow passage section 602 and the second flow passage section 603 are communicated through the space between the second part 202 and the inner wall of the first shell 100, which can reduce the communication difficulty between the first flow passage section 602 and the second flow passage section 603. And the extension direction of part of the first flow passage section 602 intersects with the extension direction of part of the second flow passage section 603, so that the airflow accelerated by the impeller 300 can be mixed through the first flow passage section 602 and the second flow passage section 603, and then blown out to the outside through the air outlet 604, so that the flow rate of the airflow blown out by the air outlet 604 is more uniform.

[0085] In one embodiment, the second part 202 extends axially to the opening.

[0086] It can be understood that the second part 202 extends axially to the opening, which can reduce the space occupation between the second part 202 and the opening.

[0087] Further, a through hole can be formed on the first housing 100 to enable the first flow passage section 602 and the second flow passage section 603 to communicate through the through hole. The extension direction of the partial first flow passage section 602 can intersect the extension direction of the partial second flow passage section 603, so that the airflow accelerated by the impeller 300 can be mixed through the first flow passage section 602 and the second flow passage section 603, and then blown out to the outside through the air outlet 604, so that the flow rate of the airflow blown out through the air outlet 604 is more uniform.

[0088] In an embodiment, the second portion 202 is located outside the opening and the air duct cavity 600, and the second portion 202 is arranged to be spaced apart from the opening. The axial orthographic projection of the partial second portion 202 is located inside the axial orthographic projection of the opening.

[0089] It can be understood that the first flow passage section 602 and the second flow passage section 603 communicate through the spacing between the second portion 202 and the opening, which can reduce the difficulty of communication between the first flow passage section 602 and the second flow passage section 603. The extension direction of the partial first flow passage section 602 can intersect the extension direction of the partial second flow passage section 603, so that the airflow accelerated by the impeller 300 can be mixed through the first flow passage section 602 and the second flow passage section 603, and then blown out to the outside through the air outlet 604, so that the flow rate of the airflow blown out through the air outlet 604 is more uniform.

[0090] It can be understood that the second portion 202 is not limited in position and can be selected according to actual use requirements.

[0091] The bladeless fan provided by the embodiment of the present application further includes a third housing 400. The third housing 400 is connected to the side of the second housing 200 away from the first housing 100 along the extension direction of the wheel shaft of the impeller 300. The third housing 400 and the second housing 200 enclose a third flow passage section 6021. The third flow passage section 6021 communicates with the first flow passage section 602.

[0092] It can be understood that the third flow passage section 6021 is used to communicate the outside of the bladeless fan with the first flow passage section 602, so that the airflow from the outside can reach the air inlet 601 through the third flow passage section 6021, and then enter the first flow passage section 602 through the air inlet 601. By arranging the third housing 400, the user cannot directly observe or touch the impeller 300 from the outside of the bladeless fan. In the case of increasing the aesthetics of the bladeless fan, the safety performance of the bladeless fan can be improved.

[0093] It should be noted that the third flow passage section 6021 has various different setting shapes, which will be illustrated in turn as follows.

[0094] In an embodiment, the third flow channel segment 6021 is a curved segment.

[0095] It can be understood that the curved segment can improve the space utilization between the third housing 400 and the second housing 200, and can improve the appearance of the bladeless fan.

[0096] In an embodiment, the third flow channel segment 6021 is a straight segment.

[0097] It can be understood that the straight segment can reduce the processing difficulty between the third housing 400 and the second housing 200, and can reduce the space occupation of the bladeless fan.

[0098] It can be understood that the shape of the third flow channel segment 6021 is not limited, and can be selected according to actual use requirements.

[0099] In the bladeless fan provided by the embodiment of the present application, the end of the second flow channel segment 603 forms an air outlet 604; along the direction of the air outlet path, the outer diameter of the first housing 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first housing 100 relatively farther away from the air outlet 604.

[0100] It can be understood that the end of the second flow channel segment 603 forms the air outlet 604, so that the air outlet 604 is located between the outer wall of the first housing 100 and the inner wall of the second housing 200, and the setting area of the air outlet 604 can be increased, so that the distribution area of the airflow blown by the bladeless fan is larger.

[0101] In the related art, the airflow has a wall attachment effect, that is, when the airflow encounters a convex object surface, the airflow tends to flow along the surface.

[0102] It should be noted that along the direction of the air outlet path, the outer diameter of the first housing 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first housing 100 relatively farther away from the air outlet 604, which has multiple different setting modes. The setting mode of the outer diameter of the first housing 100 relatively closer to the air outlet 604 being greater than the outer diameter of the first housing 100 relatively farther away from the air outlet 604 will be described in turn.

[0103] In an embodiment, the direction of the air outlet path is from the air outlet 604 to the user. Along the direction from the air outlet 604 to the user, the outer diameter of the first housing 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first housing 100 relatively farther away from the air outlet 604.

[0104] It can be understood that, along the direction from the air outlet 604 to the user, the outer diameter of the first shell 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first shell 100 relatively farther away from the air outlet 604, so that the airflow can adhere to the outer wall of the first shell 100 and flow along the extension direction of the outer wall of the first shell 100. As the airflow flows, the outer diameter of the first shell 100 decreases, so that the airflow blown out of the air outlet 604 can move towards the side close to the central axis of the first shell 100, so that the surface of the wind blown out by the bladeless fan is larger.

[0105] In an embodiment, the direction of the air outlet path is: the direction from the second air duct cavity 600 to the air outlet 604. Along the direction from the second air duct cavity 600 to the air outlet 604, the outer diameter of the first shell 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first shell 100 relatively farther away from the air outlet 604.

[0106] It can be understood that, along the direction from the second air duct cavity 600 to the air outlet 604, the outer diameter of the first shell 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first shell 100 relatively farther away from the air outlet 604. This can make the airflow gradually accelerate in the direction from the second air duct cavity 600 to the air outlet 604, so that the flow rate of the airflow blown out of the air outlet 604 is faster, thereby making the conveying distance of the airflow out of the air outlet 604 longer.

[0107] In an embodiment, the direction of the air outlet path is: the direction from the second air duct cavity 600 to the user. Along the direction from the second air duct cavity 600 to the user, the outer diameter of the first shell 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first shell 100 relatively farther away from the air outlet 604.

[0108] It can be understood that, along the direction from the second air duct cavity 600 to the user, the outer diameter of the first shell 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first shell 100 relatively farther away from the air outlet 604. This can make the airflow gradually accelerate in the direction from the second air duct cavity 600 to the air outlet 604, so that the flow rate of the airflow blown out of the air outlet 604 is faster, thereby making the conveying distance of the airflow out of the air outlet 604 longer. And it can make the airflow adhere to the outer wall of the first shell 100 and flow along the extension direction of the outer wall of the first shell 100. As the airflow flows, the outer diameter of the first shell 100 decreases, so that the airflow blown out of the air outlet 604 can move towards the side close to the central axis of the first shell 100, so that the surface of the wind blown out by the bladeless fan is larger.

[0109] It can be understood that the outer diameter of the first shell 100 relatively closer to the air outlet 604 is greater than the outer diameter of the first shell 100 relatively farther from the air outlet 604 in the direction of the air outlet path, and the specific arrangement manner is not limited, and can be selected according to actual use requirements.

[0110] The impeller 300 provided by the embodiment of the present application has multiple different types, and the setting types of the impeller 300 are sequentially exemplified below.

[0111] In a feasible implementation manner, the impeller 300 is a centrifugal impeller 301.

[0112] It can be understood that the centrifugal impeller 301 is arranged, so that the flow of the airflow output by the centrifugal impeller 301 in the air duct cavity 600 is more stable, and the airflow in the air duct cavity 600 can be accelerated and pressurized.

[0113] In another feasible implementation manner, the impeller 300 is a mixed-flow impeller 302.

[0114] It can be understood that the mixed-flow impeller 302 is arranged, so that the lift of the airflow output by the mixed-flow impeller 302 in the air duct cavity 600 is longer, and the airflow in the air duct cavity 600 can be accelerated and pressurized.

[0115] It can be understood that the setting type of the impeller 300 is not limited, and can be selected according to actual use requirements.

[0116] It should be noted that when the impeller 300 is the centrifugal impeller 301, the second shell 200 further includes a third part 203, the third part 203 is connected to the second part 202 of the second shell 200, the third part 203 is arranged in the extension direction of the wheel shaft of the centrifugal impeller 301, and the third part 203 is arranged in the extension direction of the wheel shaft of the centrifugal impeller 301. The third part 203 is arranged in the extension direction of the wheel shaft of the centrifugal impeller 301, and the third part 203 is arranged in the extension direction of the wheel shaft of the centrifugal impeller 301. The third part 203 is arranged in the extension direction of the wheel shaft of the centrifugal impeller 301.

[0117] It can be understood that by arranging the third part 203, the blades of the centrifugal impeller 301 are arranged between the third part 203 and the first shell 100, so that the air inlet end and the air outlet end of the centrifugal impeller 301 can be arranged separately to reduce the occurrence of airflow backflow, turbulence and interference of the airflow in the centrifugal impeller 301. By arranging the third part 203 and the blades of the centrifugal impeller 301, the collision between the blades and the third part 203 in the working condition can be reduced, so that the normal use of the centrifugal impeller 301 can be met, and the service life of the centrifugal impeller 301 can be prolonged.

[0118] It should be noted that when the impeller 300 is a mixed-flow impeller 302, the second portion 202 of the second shell 200 is spaced apart from the blades of the mixed-flow impeller 302 along the extension direction of the wheel axis of the mixed-flow impeller 302.

[0119] It can be understood that by spacing apart the second portion 202 from the blades of the mixed-flow impeller 302, the collision between the blades and the second portion 202 in the working condition can be reduced, so that the normal use of the mixed-flow impeller 302 can be met, thereby prolonging the service life of the bladeless fan.

[0120] The bladeless fan provided by the embodiment of the present application further comprises a driving member 500, which is arranged in the first shell 100 and is in driving connection with the impeller 300, and the driving member 500 is used to drive the impeller 300 to rotate.

[0121] It can be understood that by arranging the driving member 500, the impeller 300 can be driven to rotate, so that the airflow in the air duct cavity 600 can pass through the impeller 300 to be accelerated.

[0122] The content of the present application will be described in detail below in combination with the drawings, so that those skilled in the art can more clearly and specifically understand the content of the present application.

[0123] It should be noted that the terms "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification mean that the described embodiments can include a specific feature, structure or property, but not necessarily every embodiment includes the specific feature, structure or property. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or property is described in combination with an embodiment, it is within the knowledge of those skilled in the art to realize such feature, structure or property in combination with other embodiments described explicitly or implicitly.

[0124] Generally, the terms should be understood at least partly by the use in the context. For example, at least partly according to the context, the term "one or more" used in the text can be used to describe any feature, structure or property of singular meaning, or can be used to describe a combination of features, structures or properties of plural meaning. Similarly, at least partly according to the context, terms such as "a" or "said" can be understood as conveying singular usage or conveying plural usage.

[0125] It should be readily understood that "on," "over," and "above" in the present application are to be interpreted in the broadest context, such that "on" means not only "directly on" but also includes the meaning of "on" with intervening features or layers therebetween, and "over" or "above" includes not only the meaning of "over" or "above" but also the meaning of "over" or "above" with no intervening features or layers therebetween (i.e., directly on).

[0126] In addition, 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.

[0127] Finally, it should be noted that the above-described embodiments are merely intended for describing and illustrating, not limiting, the technical solutions of the present application; even though the present application has been described in detail with reference to the above-described embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above-described embodiments, or equivalently replace some or all of the technical features thereof; and such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bladeless fan, characterized by, The application relates to a bladeless fan, comprising: a first shell (100); a second shell (200) connected to the first shell (100), the second shell (200) and the first shell (100) enclosing a wind channel cavity (600), the wind channel cavity (600) being composed of at least two continuous and turning flow channel sections, and the two ends of the wind channel cavity (600) being an air inlet (601) and an air outlet (604); a blade wheel (300) rotatably arranged in the flow channel sections, air flowing through the air inlet (601), the two flow channel sections and the air outlet (604).

2. The bladeless fan of claim 1, wherein, The two flow channel sections comprise a first flow channel section (602) and a second flow channel section (603) in sequence; the outer wall of the first shell (100) and the inner wall of the second shell (200) enclosing the second flow channel section (603), and the part connecting the air inlet (601) and the second flow channel section (603) being defined as the first flow channel section (602); the extension direction of at least part of the first flow channel section (602) intersecting the extension direction of at least part of the second flow channel section (603).

3. The bladeless fan of claim 2, wherein, The first flow channel section (602) is a curved section; and / or, the second flow channel section (603) is a curved section.

4. The bladeless fan of claim 2, wherein, The second shell (200) comprises a first part (201) and a second part (202) connected; the first shell (100) having an opening communicating with the wind channel cavity (600), the opening comprising a first opening area (101) and a second opening area (102), the first opening area (101) being annularly arranged at the outer periphery of the second opening area (102); the first part (201) being annularly arranged at the outer periphery of the first shell (100), and the second part (202) covering the first opening area (101), the second part (202) forming the air inlet (601) corresponding to the position of the second opening area (102).

5. The bladeless fan according to claim 4, wherein: the second part (202) extending into the wind channel cavity (600) through the opening and being spaced apart from the inner wall of the first shell (100); or, the second part (202) extending axially to the opening; or, the second part (202) being located outside the opening and the wind channel cavity (600), and the second part (202) being spaced apart from the opening, the axial orthographic projection of part of the second part (202) being located inside the axial orthographic projection of the opening.

6. The bladeless fan of any one of claims 1-5, wherein, Further comprising: a third shell (400) connected to the second shell (200) away from the first shell (100) in the axial direction of the blade wheel (300); the third shell (400) and the second shell (200) enclosing a third flow channel section (6021); the third flow channel section (6021) communicating with the first flow channel section (602).

7. The bladeless fan of claim 6, wherein, The third flow channel section (6021) is a curved section; and / or, the third flow channel section (6021) is a straight section.

8. The bladeless fan of any one of claims 1-5, wherein, An outlet (604) is formed at an end of the second flow passage section (603); In the direction of the air outlet path, the outer diameter of the first shell (100) closer to the outlet (604) is greater than the outer diameter of the first shell (100) farther from the outlet (604).

9. The bladeless fan of any one of claims 1-5, wherein, The impeller (300) is a centrifugal impeller (301) or a mixed flow impeller (302).

10. The bladeless fan of any one of claims 1-5, wherein, Further comprising: A driving member (500) is arranged in the first shell (100) and is in transmission connection with the impeller (300), and the driving member (500) is used for driving the impeller (300) to rotate.

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