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, one of the first shell and the second shell is provided with an air inlet, an air outlet is formed between the first shell and the second shell, and the air inlet is communicated with the air outlet. The fan assembly comprises a centrifugal impeller, and the centrifugal impeller is located between the first shell and the second shell. The centrifugal impeller is provided with a concave part, and the concave part is matched with the air inlet, so that airflow passes through the air inlet and enters the centrifugal impeller along the concave part. Therefore, the airflow is accelerated through the tuyere, so that the output of the airflow is amplified, and the stable and uniform airflow is generated. In addition, the concave portion is arranged on the centrifugal impeller, the air inlet face of airflow is enlarged, more air volume is provided, air guiding is facilitated, and the good air suction effect is achieved.

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 fans, in particular to a bladeless fan. BACKGROUND

[0005] In recent years, the development of the fan industry in China has been 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 increasingly promoted 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 accelerating the airflow through the air outlet, the output of the airflow is amplified, thereby generating a stable and uniform airflow. In addition, by providing a recess on the centrifugal impeller, the air inlet area of the airflow is expanded, providing more wind volume, facilitating air guiding, and having a good air suction effect.

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

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

[0011] The fan assembly comprises a centrifugal impeller located between the first shell and the second shell.

[0012] The centrifugal impeller has a recess portion matched with the air inlet so that the airflow passes through the air inlet and enters the centrifugal impeller along the recess portion.

[0013] The fan assembly comprises a centrifugal impeller located between the first shell and the second shell.

[0014] In a possible implementation, the centrifugal impeller comprises a hub and a plurality of blades, one end of the plurality of blades is arranged at intervals around the outer periphery of the hub, the other end of the plurality of blades is arranged towards the inner side wall of the second shell, and the fan assembly further comprises a driving portion connected with the hub and used for driving the centrifugal impeller to rotate.

[0015] In a possible implementation, in the radial direction, the size of the end of the blade close to the hub is less than or equal to the size of the end of the blade away from the hub, so that the blade is arranged in an inclined manner.

[0016] The plurality of blades are connected to one end of the hub to form the recess portion.

[0017] In a possible implementation, each blade comprises a first arc-shaped arm and a second arc-shaped arm.

[0018] The first arc-shaped arm is connected with the hub, the second arc-shaped arm is located at the end away from the hub, and the bending direction of the first arc-shaped arm is opposite to the bending direction of the second arc-shaped arm.

[0019] In a possible implementation, a plurality of air ducts are formed between the plurality of blades, one end of the air duct is connected with the air inlet, and the other end of the air duct is connected with the air outlet.

[0020] The airflow passes through the air inlet and enters the fan assembly along the air duct, and flows out of the air outlet through the rotation of the fan assembly.

[0021] In a possible implementation, the first shell comprises a first cover plate and a first casing, the first cover plate covers the first casing, and a gap between the first cover plate and the first casing is connected to the air inlet;

[0022] The first cover plate has a protrusion on a side facing the fan assembly, the protrusion is arranged opposite to the hub, and the protrusion and the recess are matched to make the airflow flow to the air duct.

[0023] In a possible implementation, the second shell comprises a second cover plate and a second casing, the second cover plate covers one end of the second casing, and the other end of the second casing is matched with the first casing to form the air outlet;

[0024] At the air outlet, the second casing is located on the radial inner side of the first casing, and the radial dimension of the first casing is greater than that of the second casing.

[0025] In a possible implementation, the fan assembly further comprises a bottom plate connected to the hub, and a plurality of blades are arranged on the bottom plate to connect the hub, the first casing forms the air inlet, and the first casing forms a sound absorption part on a side away from the bottom plate of the plurality of blades.

[0026] In a possible implementation, the plurality of blades have a gap between one end close to the hub and the hub, and the axial length of the blade is less than the axial length of the hub.

[0027] In a possible implementation, the base and the electrical appliance assembly are further included, one end of the base is fixedly connected to the shell;

[0028] The electrical appliance assembly comprises a battery, a display screen, and a control panel, and the battery, the display screen, and the control panel are located in the base;

[0029] Alternatively, the battery, the display screen, and the control panel are located in the shell.

[0030] 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 as described above, other technical problems solved by the no-blade 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

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description only constitute a part of the embodiments of the present application. These drawings and the detailed description are not intended to limit the scope of the present application in any way, but are intended to describe the present application for the technical personnel in the art by referring to the specific embodiments. Other drawings can also be obtained by those skilled in the art without any creative effort.

[0032] Figure 1 The overall structure schematic diagram of the bladeless fan provided by the embodiments of the present application;

[0033] Figure 2 The cross-sectional schematic diagram of the bladeless fan provided by the embodiments of the present application;

[0034] Figure 3 The top view of the centrifugal impeller of the bladeless fan provided by the embodiments of the present application;

[0035] Figure 4 The structure schematic diagram of the first shell of the bladeless fan provided by the embodiments of the present application;

[0036] Figure 5 The structure schematic diagram of the second shell of the bladeless fan provided by the embodiments of the present application;

[0037] Figure 6 The cross-sectional schematic diagram of another bladeless fan provided by the embodiments of the present application;

[0038] Figure 7 The structure schematic diagram of the desktop bladeless fan provided by the embodiments of the present application;

[0039] Figure 8 The structure schematic diagram of the floor-standing bladeless fan provided by the embodiments of the present application;

[0040] Figure 9 The cross-sectional schematic diagram of another bladeless fan provided by the embodiments of the present application.

[0041] Explanation of reference signs:

[0042] 100-bladeless fan;

[0043] 200-shell; 210-first shell; 211-first cover plate; 2111-protrusion; 212-first shell body; 2121-first extension; 2122-second extension; 220-second shell; 221-second cover plate; 222-second shell body; 230-air inlet; 240-air outlet; 250-guide vane; 260-groove; 270-air outlet cavity;

[0044] 300 - fan assembly; 310 - driving part; 320 - centrifugal impeller; 321 - hub; 322 - blade; 3221 - first arc-shaped arm; 3222 - second arc-shaped arm; 323 - air duct; 324 - recess; 330 - bottom plate;

[0045] 400 - sound absorption part; 410 - first sound absorption piece; 420 - second sound absorption piece; 430 - sound absorption hole;

[0046] 500 - base;

[0047] 600 - electrical appliance assembly;

[0048] 700 - first sound absorption cavity; 710 - first bending part; 720 - first protruding rib. DETAILED DESCRIPTION

[0049] 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 those skilled in the art without creative work fall within the scope of the present application.

[0050] 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 wind volume are large, and the air outlet effect is poor.

[0051] 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, and the blades cannot be completely hidden, so that people's hands may touch the blades and cause injury, and the safety and aesthetics still need to be improved.

[0052] In view of the above technical problems, the bladeless fan provided by the embodiments of the present application includes a shell and a fan assembly. One of the first shell and the second shell is provided with an air inlet, and the air outlet is formed between the first shell and the second shell. The air inlet and the air outlet are connected in communication. The fan assembly includes a centrifugal impeller, and the centrifugal impeller is located between the first shell and the second shell. The centrifugal impeller has a recess, and the recess is matched with the air inlet, so that the airflow passes through the air inlet and enters the centrifugal impeller along the recess. In this way, the airflow is accelerated through the air outlet, thereby amplifying the output of the airflow, and further generating stable and uniform airflow. In addition, by arranging the recess on the centrifugal impeller, the air inlet area of the airflow is expanded, more wind volume is provided, air guiding is facilitated, and good air suction effect is achieved.

[0053] In order to make the above objectives, characteristics and advantages of the embodiments of the present application more apparent, clearer and easier 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 some of the embodiments of the present application, but not 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 work fall within the scope of the present application.

[0054] The embodiments of the present application provide a bladeless fan. The airflow is accelerated through the air inlet, so as to amplify the output of the airflow, and further to generate stable and uniform airflow. In addition, by setting the recess on the centrifugal impeller, the air inlet area of the airflow is expanded, more air volume is provided, the air is easily guided, and the air suction effect is good. The specific structure of the bladeless fan provided by the embodiments of the present application will be introduced below with reference to the drawings.

[0055] Reference Figure 1 And Figure 2 The embodiments of the present application provide a bladeless fan 100. Wherein, the bladeless fan 100 can include a housing 200 and a fan assembly 300. In a possible implementation manner, as shown in Figure 2 The housing 200 can further include a first housing 210 and a second housing 220, wherein one of the first housing 210 and the second housing 220 can be provided with an air inlet 230, and an air outlet 240 can be formed between the first housing 210 and the second housing 220, and the air inlet 230 and the air outlet 240 are communicated, so that the airflow can enter the housing 200 along the air inlet 230, and then flow out of the air outlet 240, to realize air outlet.

[0056] On the basis of the above-mentioned embodiments, wherein, in a possible implementation manner, the air inlet 230 can be provided on the first housing 210, and the air outlet 240 can be located in the gap between the first housing 210 and the second housing 220. In another possible implementation manner, the air inlet 230 can also be provided on the second housing 220, and the air outlet 240 can be located in the gap between the first housing 210 and the second housing 220. The embodiments of the present application are not limited here. In the embodiments of the present application, the air inlet 230 provided on the first housing 210 is taken as an example.

[0057] Continue to refer to Figure 2On the basis of the above-mentioned embodiments, the fan assembly 300 can further include a centrifugal impeller 320. The centrifugal impeller 320 can be located between the first shell 210 and the second shell 220. In a possible implementation, the centrifugal impeller 320 can have a recess 324, which can be matched with the air inlet 230, so that the airflow passes through the air inlet 230 and enters the centrifugal impeller 320 along the recess 324. In the embodiments of the present application, the airflow can pass through the air inlet 230 via the centrifugal impeller 320, and then be delivered to the air outlet 240 by the rotation of the centrifugal impeller 320, so that the airflow flows out along the air outlet 240. It can be understood that, from the appearance of the bladeless fan 100 provided in the embodiments of the present application, the centrifugal impeller 320 can be completely arranged inside the shell 200, and since there is no exposed rotating blade, the bladeless fan 100 is safer when in operation, avoiding the user from touching the rapidly rotating blade and thus being injured.

[0058] With reference back to Figure 2 On the basis of the above-mentioned embodiments, the centrifugal impeller 320 can include a hub 321 and blades 322. In a possible implementation, the number of the blades 322 can be several, which is not limited in the embodiments of the present application. In the embodiments of the present application, one end of the several blades 322 can be sequentially and spacedly arranged around the outer periphery of the hub 321, and the other end of the several blades 322 can be arranged towards the inner side wall of the second shell 220, so that the several blades 322 are sequentially arranged in the circumferential direction of the hub 321.

[0059] With reference back to Figure 2 On the basis of the above-mentioned embodiments, the fan assembly 300 can further include a driving part 310. The driving part 310 can be connected with the hub 321. It can be understood that the driving part 310 can be used to drive the several blades 322 of the centrifugal impeller 320 to rotate, so as to deliver the airflow in the centrifugal impeller 320 to the air outlet 240.

[0060] It can be understood that, in the embodiments of the present application, the airflow can pass through the air inlet 230 and enter the fan assembly 300 along the recess 324, and the driving part 310 drives the rotation of the centrifugal impeller 320, so that the airflow axially entering the fan assembly 300 flows radially to the inner side wall of the second shell 222, and finally flows out of the air outlet 240, realizing the S-shaped air duct.

[0061] With reference back to Figure 2, on the basis of the above-mentioned embodiments, in the radial direction, the size of the blade 322 of the centrifugal impeller 320 close to one end of the hub 321 can be less than or equal to the size of the blade 322 away from one end of the hub 321, so that the height of each blade 322 at both ends is different, so that the blade 322 can be arranged in an inclined manner. Wherein a plurality of blades 322 connected to one end of the hub 321 can form a recess 324, the recess 324 can be arranged towards the first shell 212, and the recess 324 can correspond to the air inlet 230.

[0062] With reference to the above-mentioned embodiments, Figure 2 , 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 322, the entire blade 322 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.

[0063] With reference to the above-mentioned embodiments, Figure 3 , on the basis of the above-mentioned embodiments, each blade 322 can include a first arc-shaped arm 3221 and a second arc-shaped arm 3222. Wherein the first arc-shaped arm 3221 can be fixedly connected with the hub 321, and the second arc-shaped arm 3222 can be located at one end away from the hub 321, and the arc bending direction of the first arc-shaped arm 3221 can be opposite to the arc bending direction of the second arc-shaped arm 3222. From the axial direction, the blade 322 can have an S-shaped structure.

[0064] With reference to the above-mentioned embodiments, Figure 2 , on the basis of the above-mentioned embodiments, a plurality of spaced blades 322 can form a plurality of air ducts 323. Wherein one end of each air duct 323 can be communicated with the air inlet 230, and the other end of each air duct 323 can be communicated with the air outlet 240. It can be understood that the airflow can enter the fan assembly 300 through the air inlet 230 and along the air duct 323, and the airflow entering the fan assembly 300 in the axial direction can flow radially along the air duct 323 to the inner side wall of the second shell 220, and finally flow out of the air outlet 240, thereby realizing air outlet.

[0065] With reference to the above-mentioned embodiments, Figure 2On the basis of the above-mentioned embodiments, further, the first shell 210 can include a first cover plate 211 and a first shell body 212. Wherein the first cover plate 211 can be covered on the first shell body 212, and there can be a certain gap between the first cover plate 211 and the first shell body 212. It can be understood that the gap between the first cover plate 211 and the first shell body 212 can be communicated with the air inlet 230. In a possible implementation, the end of the first shell body 212 towards the first cover plate 211 can be provided with an annular air inlet 230, so that the first cover plate 211 can be covered on at least part of the air inlet 230 of the first shell body 212.

[0066] With reference to the above-mentioned embodiments, Figure 2 On the basis of the above-mentioned embodiments, the first cover plate 211 can have a protruding portion 2111 on the side facing the fan assembly 300. Wherein the protruding portion 2111 can be oppositely arranged with the hub 321, and the protruding portion 2111 can cooperate with the recessed portion 324, so that a passage for airflow can be formed between the protruding portion 2111 and the recessed portion 324, so that the airflow passes through the passage and then flows to the air duct 323.

[0067] With reference to the above-mentioned embodiments, Figure 2 On the basis of the above-mentioned embodiments, further, the second shell 220 can include a second cover plate 221 and a second shell body 222. Wherein the second cover plate 221 can be covered on one end of the second shell body 222, and the other end of the second shell body 222 can cooperate with the first shell body 212, thereby forming the air outlet 240. In a possible implementation, at the air outlet 240, the second shell body 222 can be located on the radially inner side of the first shell body 212. It can be understood that the radial dimension of the first shell body 212 is greater than that of the second shell body 222, so that the air outlet 240 is formed between the first shell body 212 and the second shell body 222.

[0068] It can be understood that in the embodiments of the present application, one end of the first shell body 212 is used to cooperate with the air inlet 230, and the other end of the first shell body 212 is used to cooperate with the second shell body 222 located on the inner side of the first shell body 212, thereby forming the air outlet 240. In a possible implementation, the gap between the first shell body 212 and the second shell body 222 can form an annular air outlet 240, so that the air outlet effect is better. In other embodiments, the air outlet 240 can not be annular, but other forms, such as intermittently arranged or only partially opened, which are not limited in the embodiments of the present application.

[0069] With reference to the above-mentioned embodiments, Figure 4On the basis of the above-mentioned embodiments, the inner side wall of the first shell 212 can be provided with a guide piece 250. In one possible implementation, the number of guide pieces 250 can be several, which is not limited in the embodiments of the present application. In the embodiments of the present application, the several guide pieces 250 can be sequentially and spacedly arranged on the inner side wall of the first shell 212. One end of each guide piece 250 can be fixed to the outer edge of the first shell 212, and the other end of each guide piece 250 can be arranged to be bent towards the adjacent guide piece 250.

[0070] It can be understood that, on the basis of the above-mentioned embodiments, in combination with Figure 2 and Figure 4 , the end of the guide piece 250 arranged to be bent can be arranged close to the air inlet 230, and the other end can be arranged close to the air outlet 240. It can be understood that, after the air flow entering through the air inlet 230 is rotated by the fan assembly 300, the air flow is thrown to the inner side wall of the first shell 212 by centrifugal force, and then passes through the end of the guide piece 250 arranged to be bent, so that the air flow can pass through a smooth transition, and then pass through the other end of the guide piece 250, so that the air flow can gradually change direction without generating too much turbulence or energy loss, facilitating the smooth transition of the air flow from rotational motion to linear motion, so that the bladeless fan 100 realizes air outlet along the air outlet 240.

[0071] Referring to Figure 5 , on the basis of the above-mentioned embodiments, the outer side wall of the second shell 222 is provided with a groove 260. In one possible implementation, the number of grooves 260 can be several, which is not limited in the embodiments of the present application. In the embodiments of the present application, in combination with Figure 4 , each groove 260 can cooperate with each guide piece 250, so that at least part of the guide pieces 250 can be inserted into the grooves 260. It can be understood that the cooperation between the guide pieces 250 and the grooves 260 can realize the limiting of the guide pieces 250, and the insertion of part of the guide pieces 250 into the grooves 260 can reserve enough space for the air outlet 240, facilitating air outlet.

[0072] Continuing to refer to Figure 2 , Figure 4 and Figure 5On the basis of the above-mentioned embodiments, the two adjacent guide vanes 250, the inner side wall of the at least partial first shell 212 and the outer side wall of the at least partial second shell 222 can form an air outlet cavity 270 through which the airflow can pass. Accordingly, the guide vanes 250 interposed between the recess 260 and the inner side wall of the first shell 212 and the outer side wall of the second shell 222 can form a plurality of air outlet cavities 270, and the plurality of air outlet cavities 270 can form the annular air outlet 240. In this way, the annular air outlet 240 is divided into a plurality of air outlet cavities 270, which can make the airflow more stable when flowing out of the air outlet 240, avoiding airflow turbulence.

[0073] With reference to the above-mentioned embodiments, Figure 2 and Figure 6 On the basis of the above-mentioned embodiments, the fan assembly 300 can further include a bottom plate 330. The bottom plate 330 can be connected to the hub 321. In the embodiments of the present application, the plurality of blades 322 can be arranged on the bottom plate 330, thereby being connected to the hub 321. It can be understood that the first shell 212 forms the air inlet 230, and the first shell 212 can form a sound absorbing part 400 on the side of the plurality of blades 322 away from the bottom plate 330. In this way, the airflow entering the housing 200 through the air inlet 230 can absorb the noise in the airflow through the sound absorbing part 400, thereby achieving the effect of sound absorption and noise reduction.

[0074] With reference to the above-mentioned embodiments, Figure 2 and Figure 6 On the basis of the above-mentioned embodiments, further, the sound absorbing part 400 can include a first sound absorbing member 410, a second sound absorbing member 420 and a sound absorbing hole 430. In one possible implementation, the first sound absorbing member 410 can be located on the end of the first shell 212 arranged inwardly, and the second sound absorbing member 420 can be located in the gap between the second shell 222 and the second cover plate 221. In some embodiments, the first sound absorbing member 410 and the second sound absorbing member 420 can both be sound absorbing cotton. In addition, in one possible implementation, the number of sound absorbing holes 430 can be a plurality, and the number of sound absorbing holes 430 is not limited in the embodiments of the present application. In the embodiments of the present application, as shown in Figure 6 the plurality of sound absorbing holes 430 can be arranged on the side of the second shell 222 facing the second sound absorbing member 420. In this way, the bladeless fan 100 can absorb the noise in the airflow through the sound absorbing part 400, thereby reducing the transmission of noise sound waves and achieving the effect of reducing noise.

[0075] With reference to the above-mentioned embodiments, Figure 2On the basis of the above-mentioned embodiments, in a possible implementation, one end of the first shell 212 towards the air inlet 230 can have a first extension 2121 and a second extension 2122, and the first extension 2121 is arranged close to the air inlet 230. Both the first extension 2121 and the second extension 2122 can be arc-shaped structures, and the arc-shaped diameter corresponding to the first extension 2121 is larger than the arc-shaped diameter corresponding to the second extension 2122, so that there is a gap between the first extension 2121 and the second extension 2122. In the embodiments of the present application, the first sound-absorbing member 410 can be in a ring structure, and the two ends of the first sound-absorbing member 410 can be fixedly connected with the first extension 2121 and the second extension 2122 respectively, so that the first sound-absorbing member 410 is located in the gap between the first extension 2121 and the second extension 2122, facilitating the first sound-absorbing member 410 to absorb noise in the airflow entering through the air inlet 230. In other embodiments, the first sound-absorbing member 410 can also be an intermittent ring structure, or can also be in other forms, which are not limited in the embodiments of the present application.

[0076] With reference to Figure 2 On the basis of the above-mentioned embodiments, there is no gap between the one end of the plurality of blades 322 close to the hub 321 and the hub 321, which is conducive to guiding the airflow to the plurality of blades 322. In addition, the axial length of the blade 322 is greater than the axial length of the hub 321, so that the blade 322 with a longer axial length can form a more stable airflow channel to output a stable air volume. Moreover, the hub 321 with a shorter axial length and the blade 322 with a longer axial length can correspondingly form a larger recess 324, thereby forming a stronger negative pressure air suction capacity.

[0077] With reference to Figure 6 On the basis of the above-mentioned embodiments, there is a gap between the one end of the plurality of blades 322 close to the hub 321 and the hub 321, and the axial length of the blade 322 can be less than the axial length of the hub 321. In this way, the recess 324 can have a larger volume, thereby forming a stronger negative pressure air suction capacity. The hub 321 with a longer axial length can provide stronger structural support, thereby enhancing the overall rigidity and strength of the centrifugal impeller 320 during high-speed rotation of the centrifugal impeller 320.

[0078] With reference to Figure 2 On the basis of the above-mentioned embodiments, the bladeless fan 100 can further include a base 500. One end of the base 500 can be fixedly connected with the shell 200, thereby forming a complete bladeless fan 100 structure. It can be understood that the base 500 can be used to support the shell 200, and has good stabilizing effect.

[0079] With reference to Figure 2On the basis of the above-mentioned embodiments, the bladeless fan 100 can further include an electrical component 600. The electrical component 600 can include a battery, a display screen, a control panel, and the like. In one possible implementation, the battery, the display screen, and the control panel can be disposed in the base 500. Alternatively, in another possible implementation, the battery, the display screen, and the control panel can also be disposed in the housing 200. The present application is not limited herein.

[0080] It can be understood that, in the present application, the shape of the bladeless fan 100 varies due to the different shapes of the base 500. In some embodiments, the bladeless fan 100 can include a floor fan, a handheld fan, a desktop fan, and the like, wherein, Figure 1 is a structural schematic view of a handheld fan, Figure 7 is a structural schematic view of a desktop fan, Figure 8 is a structural schematic view of a floor fan, and the present application is not limited herein.

[0081] Continuing to refer to Figure 6 On the basis of the above-mentioned embodiments, in one possible implementation, one end of the first shell 212 facing the air inlet 230 can be provided with a first sound absorption cavity 700. It can be understood that one end of the first shell 212 can be bent along the direction of the air inlet 230, so that at least part of the inner side wall of the first shell 212 is arranged to form the first sound absorption cavity 700.

[0082] Continuing to refer to Figure 6 On the basis of the above-mentioned embodiments, the first sound absorption cavity 700 can further include a first bent portion 710 and a first protruding rib 720. The first bent portion 710 can be bent away from the first cover plate 211, and the first protruding rib 720 can be arranged to extend towards the first bent portion 710, so that the first bent portion 710 and the first protruding rib 720 form the first sound absorption cavity 700.

[0083] In one possible implementation, one end of the first shell 212 extends along the air inlet path to a height close to that of the fan assembly 300, and the first shell 212 is bent outward to form the first bent portion 710, so that the first bent portion 710 has a semi-closed structure, and the opening of the first bent portion 710 is arranged outward. In addition, the first shell 212 can be provided with the first protruding rib 720, so that the first protruding rib 720 can be arranged to protrude on the inner side wall of the first shell 212, and one end of the first protruding rib 720 can be arranged to face the opening direction of the first bent portion 710, and the first protruding rib 720 is arranged inward. It can be understood that one end of the first bent portion 710 is connected to the first protruding rib 720, and the other end of the first bent portion 710 is arranged to extend outward to form a semi-enclosed semi-closed structure.

[0084] It can be understood that in the embodiments of the present application, the air flow enters into the inner cavity of the shell 200 through the air inlet 230, and then is thrown to the inner side wall of at least part of the shell 200 by rotation of the fan assembly 300. During the flow of the air flow, the first air flow wall can be formed between the first protruding rib 720 and the end of the first bent portion 710 bent outward when passing through the first sound absorption cavity 700, and the first air flow wall and the inner side wall of the first bent portion 710 can be surrounded by the first cavity. In this way, the air flow can flow along the first air flow wall and then flow out of the air outlet 240. The first cavity can be used to trap noise in the air flow, thereby achieving the effect of sound absorption and noise reduction.

[0085] On the basis of the above-mentioned embodiments, the flow path of the air flow can be: entering into the fan assembly 300 through the air inlet 230 and along the air duct 323, driving the rotation of the impeller assembly through the driving portion 310, so that the air flow entering into the fan assembly 300 in the axial direction flows to the inner side wall of the second shell 222 in the radial direction along the air duct 323, and then flows out of the air outlet 240, realizing the S-shaped air duct.

[0086] Reference Figure 9 On the basis of the above-mentioned embodiments, in one possible implementation, the first shell 210 can be provided with an air inlet 230, and the other end of the first shell 210 and the second shell 220 can be provided with an air outlet 240. In this way, the air inlet 230 and the air outlet 240 can be located at the two ends of the shell 200 in the axial direction, and the air inlet 230 and the air outlet 240 are connected in communication, so that the air flow can enter into the shell 200 through the air inlet 230, and then flow out of the air outlet 240, realizing the straight air duct.

[0087] In the embodiments of the present application, by opening the air inlet 230 in the shape of a ring in one of the first shell 210 and the second shell 220 and opening the air outlet 240 in the shape of a ring between the first shell 210 and the second shell 220, the air flow can be accelerated through the ring-shaped air port, thereby amplifying the output of the air flow, thereby generating stable and uniform air flow. In addition, by providing the recess 324 on the centrifugal impeller 320, the air inlet area of the air flow is expanded, more air volume is provided, air guiding is facilitated, and better air suction effect is achieved.

[0088] The embodiments or implementations in the specification are 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 mutually referred to.

[0089] It should be noted that the terms "in some embodiments", "in certain embodiments", "in one embodiment", "in another embodiment", "in some implementations", "in other implementations", "for example", "as an example", "for instance", and the like, are not necessarily referring to the same embodiments. Furthermore, such phrases are not necessarily referring to the same embodiment or embodiments. Moreover, the phrase "in some embodiments" is not necessarily referring to the same embodiment or embodiments, although it can. The terms "comprising", "having", "including", and the like, as can be recited in the description and the claims, are to be construed in the broadest sense as encompassing both "consisting of" and "consisting essentially of" as well as open ended claims.

[0090] 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 taken to specifically include any singular occurrence of the feature, structure, or characteristic in a single embodiment, or can be taken to specifically include a combination of features, structures, or characteristics of the feature, structure, or characteristic in multiple embodiments, at least in part depending on the context in which the term is used. Similarly, terms, such as "a" or "the", as used herein, can be taken to convey a singular usage or a plural usage, at least in part depending on the context in which the term is used.

[0091] It will be readily understood that the terms "on", "above", and "over", in the present disclosure, are to be interpreted in the broadest sense as encompassing a direct "on", "above", or "over" relationship as well as an indirect "on", "above", or "over" relationship wherein intervening features or layers can be present in between, and that "above" or "over" can encompass a direct "above" or "over" relationship as well as an indirect "above" or "over" relationship wherein intervening features or layers can not be present in between (i.e., a direct "on", "above", or "over" relationship).

[0092] 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 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0093] Finally, it is to be understood that any other embodiments of the application that fall within the scope of the claims, are fully contemplated herein. Accordingly, the scope of the present application is not intended to be limited to the specific illustrative embodiments described above. Rather, the scope of the present application is limited solely by the claims.

Claims

1. A bladeless fan, characterized by, The application relates to a fan assembly and a fan. The fan assembly comprises: a housing, the housing comprising a first housing and a second housing, one of the first housing and the second housing being provided with an air inlet, the first housing and the second housing forming an air outlet, the air inlet and the air outlet being in communication; a fan assembly, the fan assembly comprising a centrifugal impeller, the centrifugal impeller being located between the first housing and the second housing; 2. The bladeless fan of claim 1, wherein, the centrifugal impeller being provided with a recess, the recess being matched with the air inlet so that air flows through the air inlet and enters the centrifugal impeller along the recess.

3. The bladeless fan of claim 2, wherein, The centrifugal impeller comprises a hub and a plurality of blades, one end of the plurality of blades being arranged at intervals around the outer periphery of the hub, the other end of the plurality of blades being arranged towards the inner side wall of the second housing, the fan assembly further comprising a driving part, the driving part being connected with the hub and used for driving the centrifugal impeller to rotate. In the radial direction, the size of the end of the blade close to the hub is less than or equal to the size of the end of the blade away from the hub, so that the blade is arranged in an inclined manner; 4. The bladeless fan of claim 3, wherein, a plurality of the blades are connected to one end of the hub to form the recess. Each of the blades comprises a first arc-shaped arm and a second arc-shaped arm; 5. The bladeless fan of claim 4, wherein, the first arc-shaped arm is connected with the hub, the second arc-shaped arm is located at the end away from the hub, and the bending direction of the first arc-shaped arm is opposite to the bending direction of the second arc-shaped arm. A plurality of air ducts are formed between the plurality of blades, one end of the air ducts being communicated with the air inlet, the other end of the air ducts being communicated with the air outlet; 6. The bladeless fan of claim 5, wherein, air flows through the air inlet and enters the fan assembly along the air ducts, and flows out of the air outlet through the rotation of the fan assembly. The first housing comprises a first cover plate and a first shell body, the first cover plate being arranged on the first shell body, and the gap between the first cover plate and the first shell body being communicated with the air inlet; 7. The bladeless fan of claim 6, wherein, the first cover plate is provided with a protruding part on the side facing the fan assembly, the protruding part is arranged opposite to the hub, and the protruding part is matched with the recess so that air flows to the air ducts. The second housing comprises a second cover plate and a second shell body, the second cover plate being arranged on one end of the second shell body, and the other end of the second shell body being matched with the first shell body to form the air outlet; 8. The bladeless fan of claim 6, wherein, at the air outlet, the second shell body is located on the radial inner side of the first shell body, and the radial size of the first shell body is greater than the radial size of the second shell body.

9. The bladeless fan of claim 8, wherein, The fan assembly further comprises a bottom plate, the bottom plate being connected with the hub, and the plurality of blades being arranged on the bottom plate to connect the hub, the first shell body forming the air inlet, and the first shell body being provided with a sound-absorbing part on the side away from the bottom plate.

10. The bladeless fan of any one of claims 3-5, wherein, The hub is provided with a plurality of recesses, the recesses being matched with the plurality of blades, and the plurality of blades being arranged in the recesses. The application further relates to a fan. The fan comprises: a base and an electric appliance assembly, one end of the base being fixedly connected with the housing. The electric appliance assembly comprises a battery, a display screen and a control panel, wherein the battery, the display screen and the control panel are located in the base. Alternatively, the battery, the display screen and the control panel are located in the shell.

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