Bladeless fan

Abstract

The utility model provides a bladeless fan, and particularly relates to the technical field of fans. The bladeless fan comprises a shell and a fan assembly. Wherein the shell comprises a first shell and a second shell, an air inlet is formed in one end of the first shell, an air outlet is formed between the other end of the first shell and the second shell, and the air inlet is communicated with the air outlet. The fan assembly comprises a centrifugal impeller which is located in the shell. In this way, the air inlet and the air outlet are formed in the two ends of the shell in the axial direction respectively, so that the air pressure is increased and the air speed is increased in the process that airflow flows to the air outlet from the air inlet. In addition, the centrifugal impeller is arranged in the shell, the blade shape of the centrifugal impeller can be completely hidden from the appearance, the bladeless fan is achieved, the situation that hands of people touch the blades and are injured is avoided, and high safety and stability are achieved.

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 fan, in particular to a bladeless fan. BACKGROUND

[0005] In recent years, the development of fan industry in China is relatively rapid. With the continuous development of technology and the continuous improvement of people's living standards, the demand for fans in all aspects is also getting higher and higher, and a bladeless fan is more and more popular to meet people's needs.

[0006] Among them, the bladeless fan is a new type of air circulation equipment, mainly including an impeller and a flow guide device. The fan generates centrifugal force by rotating the impeller to push air from the center outward, and uses the impeller and the flow guide device to accelerate the air and then spray it out of the air outlet of the flow guide device to form a stable air flow.

[0007] However, in the existing bladeless fan, the impeller is usually arranged separately from the flow guide device, the air flow path is too long, the wind power and wind volume are large, and the air outlet effect is not good. CONTENT OF THE INVENTION

[0008] The present application provides a bladeless fan. By arranging an air inlet and an air outlet at both ends of the shell in the axial direction, the wind pressure is increased and the wind speed is improved during the process of air flow from the air inlet to the air outlet. In addition, the centrifugal impeller is arranged inside the shell, which can completely hide the blade shape of the centrifugal impeller from the appearance, realize the bladeless of the fan, avoid the hand from touching the blade and causing injury, and has high safety and stability.

[0009] The present application provides a bladeless fan, comprising:

[0010] The shell comprises a first shell and a second shell, one end of the first shell is provided with an air inlet, the other end of the first shell and the second shell are provided with an air outlet, and the air inlet and the air outlet are in communication.

[0011] The fan assembly comprises a centrifugal impeller, and the centrifugal impeller is located inside the shell.

[0012] The no-blade fan provided by the embodiment of the application comprises a shell and a fan assembly. The shell comprises a first shell and a second shell, one end of the first shell is provided with an air inlet, the other end of the first shell and the second shell are provided with an air outlet, and the air inlet and the air outlet are in communication. The fan assembly comprises a centrifugal impeller, and the centrifugal impeller is located inside the shell. In this way, the air inlet and the air outlet are arranged at two ends of the shell in the axial direction, so that the air pressure is increased and the air speed is improved during the process of air flowing from the air inlet to the air outlet. In addition, the centrifugal impeller is arranged inside the shell, so that the blade shape of the centrifugal impeller can be completely hidden from the appearance, the no-blade fan is realized, the hand of a person is prevented from touching the blade and thus being injured, and the safety and stability are high.

[0013] In a possible implementation, the first shell comprises a first cover plate and a first shell body, the first cover plate is arranged on the first shell body, and the first cover plate and the first shell body are spaced apart and in communication with the air inlet.

[0014] A plurality of through holes are formed in the first cover plate, and each through hole is in communication with the air inlet.

[0015] In a possible implementation, the second shell comprises a second shell body and a plurality of guide pieces, one end of each guide piece is connected to the outer circumferential edge of the second shell body, and the other end of each guide piece is connected to the inner side wall of the first shell body.

[0016] The plurality of guide pieces are spaced apart and uniformly divide the air outlet to form a plurality of air outlet cavities.

[0017] In a possible implementation, the second shell body is located on the radially inner side of the first shell body, and at the air outlet, the radial dimension of the first shell body is greater than the radial dimension of the second shell body.

[0018] In a possible implementation, each guide piece comprises a straight segment and an arc segment, and in the axial direction, the straight segment is arranged on the front side of the arc segment.

[0019] In a possible implementation, the second shell further comprises a second cover plate, and the second cover plate is arranged on one end of the second shell body away from the centrifugal impeller.

[0020] In a possible implementation, the second cover plate and the second shell body have an internal cavity therebetween.

[0021] The internal cavity is used for placing one or more of a battery, a display screen and a control panel.

[0022] In a possible implementation, the fan assembly further comprises a driving part connected with the centrifugal impeller, and the driving part is used for driving the centrifugal impeller to rotate.

[0023] The centrifugal impeller comprises a hub and a plurality of blades, the hub is connected with the driving part, and the plurality of blades are arranged at intervals on the outer periphery of the hub.

[0024] The centrifugal impeller does not protrude backward beyond the first shell, and the area of the air inlet is less than or equal to the radial cross-sectional area of the centrifugal impeller.

[0025] In a possible implementation, the fan assembly is fixed to the second shell, and the second shell completely covers the fan assembly.

[0026] In a possible implementation, the bladeless fan further comprises a base and a battery, the base is fixedly connected with the shell, and the battery is located in the base.

[0027] Alternatively, the battery is located in the shell.

[0028] In addition to the technical problems solved by the present application, the technical features constituting the technical solutions and the beneficial effects brought by these technical features described above, other technical problems solved by the bladeless fan provided by the present application, other technical features included in the technical solutions and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0029] 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 description of the embodiments of the present application or the prior art will be briefly introduced. Obviously, the drawings in the following description only represent a part of the embodiments of the present application, and these drawings and the written description are not intended to limit the scope of the present application in any way, but to explain the present application to those skilled in the art by reference to specific embodiments. Those skilled in the art can also obtain other drawings without creative labor based on these drawings.

[0030] Figure 1 The overall structure schematic diagram of the bladeless fan provided by the embodiments of the present application;

[0031] Figure 2 The partial cross-sectional schematic diagram of the bladeless fan provided by the embodiments of the present application;

[0032] Figure 3 The structure schematic diagram of the second shell of the bladeless fan provided by the embodiments of the present application;

[0033] Figure 4 A top view of a centrifugal impeller of a bladeless fan provided by an embodiment of the present application;

[0034] Figure 5 A structural schematic diagram of a handheld bladeless fan provided by an embodiment of the present application;

[0035] Figure 6 A structural schematic diagram of a tabletop bladeless fan provided by an embodiment of the present application.

[0036] Legend of reference signs:

[0037] 100 - bladeless fan;

[0038] 200 - housing; 210 - first housing; 211 - air inlet; 212 - first cover plate; 213 - first casing; 2131 - through hole; 2132 - first inner side wall; 2133 - first outer side wall; 220 - second housing; 221 - air outlet; 222 - second casing; 223 - guide vane; 2231 - straight segment; 2232 - arc segment; 224 - air outlet cavity; 225 - second cover plate; 226 - inner cavity;

[0039] 300 - fan assembly; 310 - centrifugal impeller; 311 - hub; 312 - blade; 3121 - first arc arm; 3122 - second arc arm; 313 - air duct; 314 - recessed structure; 320 - driving part;

[0040] 400 - base. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all 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 labor fall within the scope of protection of the present application.

[0042] As described in the background, in the existing bladeless fan, the impeller is usually arranged separately from the flow guide device, the air flow path is too long, the wind power and air volume are greatly lost, and the air outlet effect is poor.

[0043] Alternatively, the impeller can be arranged inside the flow guide device. However, most of the bladeless fans can still see the shape of the blades of the impeller in the front view or side view, the blades cannot be completely hidden, the hands of people can touch the blades and cause injuries, and the safety and aesthetics still need to be improved.

[0044] To solve the above technical problems, the bladeless fan provided by the embodiment of the present application comprises a shell and a fan assembly. The shell comprises a first shell and a second shell. One end of the first shell is provided with an air inlet, and the other end of the first shell and the second shell are provided with an air outlet. The air inlet and the air outlet are connected. The fan assembly comprises a centrifugal impeller, and the centrifugal impeller is located inside the shell. In this way, the air inlet and the air outlet are arranged at the two ends of the shell in the axial direction, so that the air pressure is increased and the air speed is improved during the process of air flowing from the air inlet to the air outlet. In addition, the centrifugal impeller is arranged inside the shell, so that the blade shape of the centrifugal impeller can be completely hidden from the appearance, the bladeless fan is realized, the hand of a person is prevented from touching the blade and thus being injured, and the safety and stability are high.

[0045] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] The embodiment of the present application provides a bladeless fan. The air inlet and the air outlet are arranged at the two ends of the shell in the axial direction, so that the air pressure is increased and the air speed is improved during the process of air flowing from the air inlet to the air outlet. In addition, the centrifugal impeller is arranged inside the shell, so that the blade shape of the centrifugal impeller can be completely hidden from the appearance, the bladeless fan is realized, the hand of a person is prevented from touching the blade and thus being injured, and the safety and stability are high. The specific structure of the bladeless fan provided by the embodiment of the present application will be introduced below with reference to the drawings.

[0047] Reference Figure 1 and Figure 2 The embodiment of the present application provides a bladeless fan 100. Wherein the bladeless fan 100 can comprise a shell 200 and a fan assembly 300. In a possible implementation manner, as shown in Figure 1 the shell 200 can further comprise a first shell 210 and a second shell 220, wherein one end of the first shell 210 can be provided with an air inlet 211, and correspondingly, the other end of the first shell 210 and the second shell 220 can be provided with an air outlet 221. In the axial direction, the air inlet 211 and the air outlet 221 can be located at the two ends of the shell 200, and the air inlet 211 and the air outlet 221 are connected, so that the air can enter into the shell 200 along the air inlet 211, and then flow out of the air outlet 221, realizing air outlet.

[0048] Alternatively, in one possible implementation, such as Figure 2 As shown, the fan assembly 300 may further include a centrifugal impeller 310. The centrifugal impeller 310 may be located inside the housing 200. In one possible implementation, a receiving cavity may be formed between the first housing 210 and the second housing 220, and the centrifugal impeller 310 may be completely located within the receiving cavity. In this embodiment, airflow can pass through the air inlet 211 via the centrifugal impeller 310, and then the rotation of the centrifugal impeller 310 delivers the airflow to the air outlet 221, causing the airflow to flow out along the air outlet 221. Furthermore, from the appearance of the bladeless fan 100 provided in this embodiment, the centrifugal impeller 310 is completely disposed inside the housing 200. Since there are no exposed rotating blades, the bladeless fan 100 is safer during operation, preventing users from touching the rapidly rotating blades and causing injury.

[0049] refer to Figure 2 Based on the above embodiments, the first outer casing 210 may further include a first cover plate 212 and a first housing 213. The first cover plate 212 may cover the first housing 213. In one possible implementation, the end of the first housing 213 facing the first cover plate 212 may have an air inlet 211, thereby allowing the first cover plate 212 to cover at least a portion of the air inlet 211 of the first housing 213. In this embodiment, an annular gap may be present between the first cover plate 212 and the first housing 213, and this annular gap may communicate with the air inlet 211. Furthermore, the first cover plate 212 may have several through holes 2131, each of which may communicate with the air inlet 211. It is understood that airflow can enter the air inlet 211 through different locations and then enter the interior of the outer casing 200; this embodiment does not impose any limitations on this. In other embodiments, the spacing between the first cover plate 212 and the first housing 213 may also be in other forms, which are not limited in this application embodiment.

[0050] Continue to refer to Figure 2On the basis of the above-mentioned embodiments, the first shell 213 can further include a first inner side wall 2132 and a first outer side wall 2133. The first inner side wall 2132 is located at the inner side end of the first outer side wall 2133 in the radial direction. In one possible implementation, the first inner side wall 2132 is connected to the end of the first outer side wall 2133 facing the air inlet 211, and the end of the first outer side wall 2133 facing the air outlet 221 is bent in the opposite direction and connected to the end of the first inner side wall 2132 facing the air outlet 221, thereby forming a smooth transition curve, which has a good guiding effect on the airflow and facilitates air outlet. Of course, in other embodiments, the first shell 213 can also be a shell structure with only one layer of wall, which is not limited in the embodiments of the present application.

[0051] With reference to the above-mentioned embodiments, Figure 2 On the basis of the above-mentioned embodiments, the second shell 220 can further include a second shell 222 and a plurality of guide vanes 223. In one possible implementation, the number of guide vanes 223 can be several, which is not limited in the embodiments of the present application. In the embodiments of the present application, one end of each guide vane 223 can be connected to the outer peripheral edge of the second shell 222, and the other end of each guide vane 223 can be connected to the first inner side wall 2132 of the first shell 213, so that the plurality of guide vanes 223 are uniformly and spacedly arranged in the gap between the first shell 213 and the second shell 222. In other embodiments, the plurality of guide vanes 223 can be integrally formed on the inner side wall of the first shell 213; or part of the guide vanes 223 are integrally formed on the second shell 222, and part of the guide vanes 223 are integrally formed on the first shell 213; or the guide vanes 223 are separately formed and installed between the first shell 213 and the second shell 222, which is not limited in the embodiments of the present application.

[0052] With reference to the above-mentioned embodiments, Figure 2 And Figure 3 On the basis of the above-mentioned embodiments, it can be understood that the gap between the first inner side wall 2132 of the first shell 213 and the outer side wall of the second shell 222 can form an annular air outlet 221. Accordingly, the plurality of guide vanes 223 are located in the gap between the first shell 213 and the second shell 222, so that the plurality of guide vanes 223 are spacedly and uniformly divided into the air outlet 221, thereby forming a plurality of air outlet cavities 224.

[0053] With reference to the above-mentioned embodiments, Figure 2On the basis of the above-mentioned embodiments, in one possible implementation, the second shell 222 can be located radially inward of the first shell 213, and at the air outlet 221, the radial dimension of the first shell 213 can be greater than the radial dimension of the second shell 222, so that the first inner side wall 2132 of the first shell 213 and the outer side wall of the second shell 222 form the air outlet 221 through the guide vanes 223.

[0054] It can be understood that the air flow can enter the air inlet 211 through different positions and then enter the inside of the shell 200, and finally flow out through the air outlet 221. Wherein, the size of the air inlet 211 and the size of the air outlet 221 are not the same, on the basis of which, the air flow can be increased in the process of flowing from the air inlet 211 to the air outlet 221, and the wind speed can be improved.

[0055] Continuing to refer to Figure 3 On the basis of the above-mentioned embodiments, in one possible implementation, each guide vane 223 can include a straight segment 2231 and an arc segment 2232, which are connected. In the embodiments of the present application, in combination with Figure 2 In the axial direction, the straight segment 2231 can be located at the front side of the arc segment 2232. It can be understood that after the air flow entering through the air inlet 211 is rotated by the centrifugal impeller 310, the air flow is thrown to the inner side wall of the first shell 213 by the centrifugal force and then passes through the arc segment 2232 of the guide vane 223, so that the air flow can pass through a smooth transition and then pass through the straight segment 2231 of the guide vane 223, so that the air flow can gradually change direction without generating too much turbulence or energy loss, facilitating the transition of the air flow from rotational motion to linear motion, so that the bladeless fan 100 realizes direct blowing.

[0056] Continuing to refer to Figure 2 On the basis of the above-mentioned embodiments, the second shell 220 can further include a second cover plate 225. Wherein, the second cover plate 225 is arranged on the end of the second shell 222 away from the centrifugal impeller 310. In one possible implementation, the radial dimension of the second cover plate 225 can be greater than or equal to the radial dimension of the second shell 222, so that the second cover plate 225 can cover the second shell 222, facilitating the installation of the overall structure.

[0057] Continuing to refer to Figure 2 On the basis of the above-mentioned embodiments, after the second cover plate 225 is arranged on the second shell 222, an internal cavity 226 with a certain thickness can be formed between the second cover plate 225 and the second shell 222. It can be understood that the internal cavity 226 can be used to place one or more of the electrical components such as batteries, display screens, control panels, etc., facilitating user operation, which is not limited in the embodiments of the present application.

[0058] Continue to refer to Figure 2 Based on the above embodiments, the fan assembly 300 may further include a drive unit 320. The drive unit 320 may be connected to the centrifugal impeller 310 in a driving connection. Further, the centrifugal impeller 310 may include a hub 311 and blades 312. In one possible implementation, the number of blades 312 may be several, which is not limited in this embodiment. In this embodiment, the hub 311 may be connected to the drive unit 320, and several blades 312 may be sequentially and spaced apart on the outer periphery of the hub 311, so that the several blades 312 surround the hub 311 in the circumferential direction. It is understood that the drive unit 320 can be used to drive the several blades 312 of the centrifugal impeller 310 to rotate, thereby allowing the airflow between the several blades 312 to be delivered to the air outlet 221.

[0059] Continue to refer to Figure 2 Based on the above embodiment, a plurality of air ducts 313 can be formed between a plurality of spaced-apart blades 312. One end of each air duct 313 can be connected to an air inlet 211, and the other end of each air duct 313 can be connected to an air outlet 221. It is understood that airflow can enter the fan assembly 300 through the air inlet 211 and along the air ducts 313, and then drive the centrifugal impeller 310 to rotate via the drive unit 320, causing the airflow to flow out of the air outlet 221 along the air ducts 313, thus achieving air outlet.

[0060] Continue to refer to Figure 2 Based on the above embodiments, the centrifugal impeller 310 does not extend rearward beyond the first housing 210, thereby preventing the centrifugal impeller 310 from protruding from the first housing 210. Additionally, in one possible implementation, the area of ​​the air inlet 211 can be less than or equal to the radial cross-sectional area of ​​the centrifugal impeller 310. This allows the airflow through the air inlet 211 to fully enter the centrifugal impeller 310, facilitating smooth airflow discharge.

[0061] Continue to refer to Figure 2 Based on the above embodiments, the fan assembly 300 is fixed to the second housing 222, and the second housing 222 can completely cover the fan assembly 300. In this way, from the appearance of the bladeless fan 100, the centrifugal impeller 310 can be completely located inside the housing 200, preventing the blades 312 from being exposed outside the housing 200, thereby improving both the appearance and safety of the bladeless fan 100.

[0062] Continue to refer to Figure 2, on the basis of the above-mentioned embodiments, wherein, in a possible implementation, in the radial direction, the size of the blade 312 of the centrifugal impeller 310 close to one end of the hub 311 can be less than or equal to the size of the blade 312 away from one end of the hub 311, so that the height of each blade 312 at both ends is different, so that several blades 312 close to one end of the hub 311 can form a concave structure 314. Wherein, the concave structure 314 can correspond to the air inlet 211.

[0063] With reference to the above-mentioned embodiments, Figure 4 , on the basis of the above-mentioned embodiments, it can be understood that, in the embodiments of the present application, due to the different heights of the two ends of the blade 312, the entire blade 312 is an inclined structure with the outer side higher than the inner side, thereby expanding the air inlet area of the airflow and providing more air volume, facilitating air guiding and having a better air suction effect.

[0064] With reference to the above-mentioned embodiments, Figure 1 , on the basis of the above-mentioned embodiments, each blade 312 can include a first arc-shaped arm 3121 and a second arc-shaped arm 3122. Wherein, the first arc-shaped arm 3121 can be fixedly connected with the hub 311, and the second arc-shaped arm 3122 can be located at one end away from the hub 311, and the arc bending direction of the first arc-shaped arm 3121 can be opposite to the arc bending direction of the second arc-shaped arm 3122. From the axial direction, the blade 312 can have an S-shaped structure.

[0065] With reference to the above-mentioned embodiments, Figure 1 , on the basis of the above-mentioned embodiments, the bladeless fan 100 can further include a base 400. Wherein, one end of the base 400 can be fixedly connected with the shell 200, thereby forming a complete bladeless fan 100 structure. It can be understood that the base 400 can be used to support the shell 200 and has a good stabilizing effect. In a possible implementation, the battery can also be arranged in the base 400, which is not limited in the embodiments of the present application.

[0066] It can be understood that, in the embodiments of the present application, the shape of the base 400 is different, and the shape of the bladeless fan 100 is also different. In some embodiments, the bladeless fan 100 can include a floor fan, a handheld fan, a desktop fan, etc., wherein, Figure 5 is a structural schematic view of a floor fan, Figure 6 is a structural schematic view of a handheld fan, ​ is a structural schematic view of a desktop fan, which is not limited in the embodiments of the present application.

[0067] In the embodiment of the present application, the air inlet 211 and the air outlet 221 are respectively arranged on the first shell 210 and the second shell 220, so that the air flow increases the air pressure and improves the air speed during the process of flowing from the air inlet 211 to the air outlet 221. In addition, the centrifugal impeller 310 is arranged between the first shell 210 and the second shell 220, so that the shape of the blade 312 of the centrifugal impeller 310 can be completely hidden from the appearance, the fan is realized without blades, the hand of a person is prevented from touching the blade 312 to cause injury, and the fan has high safety and stability.

[0068] Each embodiment or implementation in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be understood by referring to each other.

[0069] It should be noted that the terms "in a specific implementation", "in some embodiments", "in the present embodiment", "exemplarily" and the like in the specification mean that the described embodiments can include specific features, structures or characteristics, but not necessarily every embodiment includes the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure or characteristic is described in combination with an embodiment, it is within the knowledge of those skilled in the art to realize such feature, structure or characteristic in combination with other embodiments described explicitly or implicitly.

[0070] 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 specification can be used to describe any feature, structure or characteristic in the singular sense, or can be used to describe a combination of features, structures or characteristics in the plural sense. Similarly, at least partly according to the context, the terms such as "a" or "said" can be understood as conveying the singular usage or conveying the plural usage.

[0071] It should be easily understood that "on", "above" and "over" in the present disclosure should be interpreted in the broadest manner, so that "on" not only means "directly on", but also includes the meaning of "on" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over", but also can include the meaning of "above" or "over" without intermediate features or layers therebetween (i.e. directly on).

[0072] Moreover, 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 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0073] In the end it should be stated that further embodiments of the application will occur to those skilled in the art, having regard to the specification and practice of the application disclosed herein. The application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such further modifications and features as come within the scope of the application, as can be known, considered or deemed relatively commonplace to the art, not following but included in the present description and drawings and can be apparent to those skilled in the art and, accordingly, can be rendered without departing from the scope of the application which is set out only in the accompanying claims. The scope of the application is limited only by the claims which are appended hereto.

Claims

1. A bladeless fan, characterized by, The utility model relates to a fan, and particularly relates to a fan with a second shell. The utility model relates to a fan, and particularly relates to a fan with a second shell. The first shell comprises a first cover plate and a first casing, the first cover plate is covered on the first casing, and the first cover plate and the first casing are spaced apart and communicate with the air inlet.

2. The bladeless fan of claim 1, wherein, The first cover plate is provided with a plurality of through holes, and each through hole communicates with the air inlet. The second shell comprises a second casing and a plurality of guide vanes, one end of the guide vanes is connected to the outer circumferential edge of the second casing, and the other end of the guide vanes is connected to the inner side wall of the first casing.

3. The bladeless fan of claim 2, wherein, The plurality of guide vanes are spaced apart and uniformly divide the air outlet to form a plurality of air outlet cavities. The second casing is located on the radially inner side of the first casing, and at the air outlet, the radial dimension of the first casing is greater than that of the second casing.

4. The bladeless fan of claim 3, wherein, Each guide vane comprises a straight segment and an arc segment, and in the axial direction, the straight segment is located on the front side of the arc segment.

5. The bladeless fan of claim 3, wherein, The second shell further comprises a second cover plate, the second cover plate is covered on one end of the second casing away from the centrifugal impeller.

6. The bladeless fan of claim 3, wherein, The second cover plate and the second casing have an internal cavity therebetween.

7. The bladeless fan of claim 6, wherein, The internal cavity is used for placing one or more of a battery, a display screen, and a control panel. The fan assembly further comprises a driving portion, the driving portion is connected to the centrifugal impeller, and the driving portion is used for driving the centrifugal impeller to rotate.

8. The bladeless fan of any one of claims 1-7, wherein, The centrifugal impeller comprises a hub and a plurality of blades, the hub is connected to the driving portion, and the plurality of blades are arranged at intervals on the outer periphery of the hub. The centrifugal impeller does not protrude backward beyond the first shell, and the area of the air inlet is less than or equal to the radial cross-sectional area of the centrifugal impeller. The fan assembly is fixed to the second casing, and the second casing completely covers the fan assembly.

9. The bladeless fan of claim 3, wherein, The utility model relates to a fan, and particularly relates to a fan with a second shell.

10. The bladeless fan of any one of claims 1-7, wherein, The base and the shell are fixedly connected, and the battery is located in the base. Alternatively, the battery is located in the shell. ​

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