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, a fan assembly and a sound absorption assembly. Wherein the shell is provided with an inner cavity, the shell comprises a first shell body and a second shell body, the first shell body is provided with an air inlet, an air outlet is formed between the first shell body and the second shell body, and the air inlet and the air outlet are respectively communicated with the inner cavity. The fan assembly is located in the internal cavity. The sound absorption assembly comprises a first sound absorption part, and at least part of the inner side wall of the first shell is defined to form the first sound absorption part. In this way, by arranging the sound absorption assembly on the shell, noise in airflow can be trapped conveniently. According to the bladeless fan, noise in airflow can be absorbed through the sound absorption assembly, so that transmission of noise sound waves is reduced, and the effect of reducing the noise is 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, when the air flow passes through the high-speed rotating impeller inside the bladeless fan, vortex and air flow friction will be generated inside the flow guide device, resulting in noise of the bladeless fan, and the motor of the bladeless fan will also produce mechanical noise during operation. INVENTION CONTENTS

[0008] The present application provides a bladeless fan. By setting the sound absorption assembly on the shell, the noise in the air flow can be trapped. The bladeless fan can absorb the noise in the air flow through the sound absorption assembly, thereby reducing the transmission of noise sound waves and achieving the effect of reducing noise.

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

[0010] The shell has an internal cavity, and the shell comprises a first shell and a second shell. The first shell is provided with an air inlet. The first shell and the second shell form an air outlet. The air inlet and the air outlet are respectively connected with the internal cavity.

[0011] The fan assembly is located in the internal cavity.

[0012] The sound absorption assembly comprises a first sound absorption part. At least part of the inner side wall of the first shell surrounds to form the first sound absorption part.

[0013] The no-blade fan provided by the embodiment comprises a shell, a fan assembly and a sound absorption assembly. The shell has an internal cavity. The shell comprises a first shell and a second shell. The first shell is provided with an air inlet. The first shell and the second shell form an air outlet. The air inlet and the air outlet are respectively connected with the internal cavity. The fan assembly is located in the internal cavity. The sound absorption assembly comprises a first sound absorption part. At least part of the inner side wall of the first shell surrounds to form the first sound absorption part. In this way, the sound absorption assembly is arranged on the shell, so as to trap the noise in the airflow. The no-blade fan can absorb the noise in the airflow through the sound absorption assembly, so as to reduce the transmission of noise sound waves and achieve the effect of reducing noise.

[0014] In a possible implementation, the first sound absorption part comprises a first bending part and a first protruding rib.

[0015] The first bending part is bent away from the fan assembly. The first protruding rib is arranged to extend towards the first bending part, so as to form the first sound absorption part with the first bending part and the first protruding rib.

[0016] In a possible implementation, the first bending part and the first protruding rib are directly connected to the first shell.

[0017] One end of the first bending part is connected to one end of the first shell provided with the air inlet. One end of the first protruding rib is connected to the inner side wall of the first shell. The other end of the first bending part and the other end of the first protruding rib are arranged to be spaced apart. The first sound absorption part is formed between the first bending part, the first protruding rib and part of the inner side wall of the first shell located between the first bending part and the first protruding rib.

[0018] In a possible implementation, the first bending part is indirectly connected to the first shell. The first bending part is arranged to be spaced apart from one end of the first shell provided with the air inlet. The first bending part is arranged to be spaced apart from the inner side wall of the first shell. One end of the first protruding rib is directly connected to the first shell. The other end of the first protruding rib is arranged to be spaced apart from the first bending part. The first sound absorption part is formed between the first bending part, the first protruding rib and part of the inner side wall of the first shell located between the first bending part and the first protruding rib.

[0019] Alternatively, one end of the first bending portion is directly connected to one end of the first shell opening the air inlet, the first protruding rib is indirectly connected to the inner side wall of the first shell, the first protruding rib is arranged in a spaced manner with the inner side wall of the first shell, and one end of the first protruding rib is arranged in a spaced manner with the other end of the first bending portion. The first bending portion, the first protruding rib, and the part of the inner side wall of the first shell located therebetween form a first sound absorption portion.

[0020] In a possible implementation, the side of the first bending portion facing away from the air inlet is further provided with a plurality of bone guides, and the plurality of bone guides are arranged in a spaced manner around the first bending portion.

[0021] In a possible implementation, the sound absorption assembly further comprises a second sound absorption portion, and at least part of the inner side wall of the second shell surrounds to form the second sound absorption portion.

[0022] At least part of the second sound absorption portion and at least part of the first sound absorption portion are arranged in a spaced manner.

[0023] In a possible implementation, the second sound absorption portion comprises a second bending portion and a second protruding rib.

[0024] The second bending portion is bent away from the first shell, and the second protruding rib is arranged in an extending manner towards the second bending portion, so that the second bending portion and the second protruding rib form the second sound absorption portion.

[0025] In a possible implementation, the second bending portion and the second protruding rib are directly connected to the second shell.

[0026] One end of the second bending portion is connected to one end of the second shell forming the air outlet, one end of the second protruding rib is connected to the inner side wall of the second shell, the other end of the second bending portion and the other end of the second protruding rib are arranged in a spaced manner, and the second bending portion, the second protruding rib, and at least part of the inner side wall of the second shell located therebetween form the second sound absorption portion.

[0027] In a possible implementation, the fan assembly comprises a driving portion and an impeller assembly.

[0028] The impeller assembly comprises a hub and a plurality of blades, the hub is connected to the driving portion, and the plurality of blades are arranged in a spaced manner around the outer periphery of the hub.

[0029] The airflow enters the fan assembly through the air inlet, flows through the first sound absorption portion after rotating through the fan assembly, and flows out of the air outlet.

[0030] In a possible implementation, the impeller assembly comprises a centrifugal impeller, in the radial direction, the size of one end of the blade close to the hub is less than or equal to the size of the other end of the blade away from the hub, so that the side of the plurality of blades close to the hub forms a concave structure, and the concave structure is arranged towards the air inlet.

[0031] Alternatively, the impeller assembly includes a mixed flow impeller, the blades are connected to the outer periphery of the hub, and the radial dimension of the end of the hub away from the first housing is greater than the radial dimension of the end of the hub toward the first housing.

[0032] 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, the other technical problems solved by the present application, the 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

[0033] 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 are only 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 obtain other drawings without creative labor.

[0034] Figure 1 The overall structure schematic diagram of the bladeless fan provided by the embodiments of the present application is shown in the figure.

[0035] Figure 2 The A-A cross section schematic diagram of the bladeless fan provided by the embodiments of the present application is shown in the figure.

[0036] Figure 3 The A-A cross section schematic diagram of another bladeless fan provided by the embodiments of the present application is shown in the figure.

[0037] Figure 4 The structure schematic diagram of the first bending part of the bladeless fan provided by the embodiments of the present application is shown in the figure.

[0038] Figure 5 The top view of the impeller assembly of the bladeless fan provided by the embodiments of the present application is shown in the figure.

[0039] Figure 6 The structure schematic diagram of another impeller assembly of the bladeless fan provided by the embodiments of the present application is shown in the figure.

[0040] Figure 7 The structure schematic diagram of the handheld bladeless fan provided by the embodiments of the present application is shown in the figure.

[0041] Figure 8 The structure schematic diagram of the floor-standing bladeless fan provided by the embodiments of the present application is shown in the figure.

[0042] Explanation of reference signs:

[0043] 100 - bladeless fan;

[0044] 200 - housing; 210 - internal cavity; 220 - air inlet; 230 - air outlet; 240 - first cover plate; 250 - first housing; 260 - second cover plate; 270 - second housing; 280 - guide rib; 281 - first sound absorption cavity;

[0045] 300 - fan assembly; 310 - driving part; 320 - impeller assembly; 321 - hub; 322 - blade; 3221 - first arc-shaped arm; 3222 - second arc-shaped arm; 323 - air duct; 324 - recess structure;

[0046] 400 - sound absorption assembly; 410 - first sound absorption part; 411 - first bending part; 412 - first protruding rib; 420 - second sound absorption part; 421 - second bending part; 422 - second protruding rib;

[0047] 500 - base;

[0048] 600 - first sound absorption piece; 610 - sound absorption hole. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with 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 labor fall within the scope of protection of the present application.

[0050] As described in the background, in the existing bladeless fan, when the airflow passes through the high-speed rotating impeller inside the bladeless fan, vortex and airflow friction will be generated inside the guide device, resulting in noise of the bladeless fan, and the motor of the bladeless fan will also generate mechanical noise during operation.

[0051] In addition, most of the bladeless fans can still see the shape of the blades of the impeller from the front 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 order to solve the above technical problems, the bladeless fan provided by the embodiment of the present application comprises a shell, a fan assembly and a sound absorption assembly. The shell has an internal cavity. The shell comprises a first shell and a second shell. The first shell is provided with an air inlet. The first shell and the second shell form an air outlet. The air inlet and the air outlet are respectively connected with the internal cavity. The fan assembly is located in the internal cavity. The sound absorption assembly comprises a first sound absorption part. At least part of the inner side wall of the first shell surrounds the first sound absorption part. In this way, the sound absorption assembly is arranged on the shell to trap the noise in the airflow. The bladeless fan can absorb the noise in the airflow through the sound absorption assembly, thereby reducing the transmission of noise sound waves and achieving the effect of reducing noise.

[0053] 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, not 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 labor fall within the scope of protection of the present application.

[0054] The embodiment of the present application provides a bladeless fan. The sound absorption assembly is arranged on the shell to trap the noise in the airflow. The bladeless fan can absorb the noise in the airflow through the sound absorption assembly, thereby reducing the transmission of noise sound waves and achieving the effect of reducing noise. The specific structure of the bladeless fan provided by the embodiment of the present application will be introduced below with reference to the drawings.

[0055] Reference Figure 1 and Figure 2 The embodiment of the present application provides a bladeless fan 100. The bladeless fan 100 can comprise a shell 200, a fan assembly 300 and a sound absorption assembly 400. In a possible implementation manner, as shown in Figure 2 The shell 200 can have an internal cavity 210. The shell 200 can be respectively provided with an air inlet 220 and an air outlet 230. The air inlet 220 and the air outlet 230 can be connected with the internal cavity 210, so that the airflow enters the internal cavity 210 from the air inlet 220 and then flows out through the air outlet 230, thereby realizing air outlet.

[0056] Continuing to refer to Figure 2 On the basis of the above embodiment, the shell 200 can further comprise a first shell 250 and a second shell 270. In a possible implementation manner, the first shell 250 can be provided with the air inlet 220. The first shell 250 and the second shell 270 can form the air outlet 230. The air inlet 220 and the air outlet 230 can be respectively connected with the internal cavity 210.

[0057] Continue to refer to Figure 2 Based on the above embodiments, the fan assembly 300 can be located within the internal cavity 210. In this embodiment, airflow can pass through the air inlet 220, then through the fan assembly 300, and the rotation of the fan assembly 300 delivers the airflow to the air outlet 230, allowing the airflow to flow out along the air outlet 230. It is understood that, from the appearance of the bladeless fan 100 provided in this embodiment, the fan assembly 300 can be completely housed inside the housing 200. Since there are no exposed rotating blades, the bladeless fan 100 is safer to operate, preventing users from touching the rapidly rotating blades and causing injury.

[0058] Continue to refer to Figure 2 Based on the above embodiments, the sound-absorbing component 400 may include a first sound-absorbing part 410. In one possible implementation, at least a portion of the inner sidewall of the first housing 250 may be surrounded by the first sound-absorbing part 410, which has a semi-enclosed structure. Thus, the first sound-absorbing part 410 is positioned in the airflow path, and during airflow, it can trap some noise, thereby achieving sound absorption and noise reduction.

[0059] Continue to refer to Figure 2 Based on the above embodiments, the outer casing 200 may further include a first cover plate 240. The first cover plate 240 can cover the first housing 250, and there may be a certain gap between the first cover plate 240 and the first housing 250. In one possible implementation, the end of the first housing 250 facing the first cover plate 240 may have an air inlet 220, so that the first cover plate 240 can cover at least a portion of the air inlet 220 of the first housing 250. In this embodiment, the end of the first housing 250 facing the air inlet 220 may be provided with a first sound-absorbing portion 410. It is understood that one end of the first housing 250 may be bent along the direction of the air inlet 220, so that at least a portion of the inner sidewall of the first housing 250 is formed to form the first sound-absorbing portion 410.

[0060] Continue to refer to Figure 2 Based on the above embodiments, the first sound-absorbing part 410 may further include a first bent part 411 and a first protruding rib 412. The first bent part 411 may be bent away from the first cover plate 240, while the first protruding rib 412 may extend toward the first bent part 411, thereby forming the first sound-absorbing part 410 with the first bent part 411 and the first protruding rib 412.

[0061] Continue to refer to Figure 2, the first bending portion 411 and the first protruding rib 412 can be directly connected to the first shell 250. The one end of the first bending portion 411 can be connected to the one end of the first shell 250 with the air inlet 220, and the one end of the first protruding rib 412 can be connected to the inner side wall of the first shell 250. Alternatively, the other end of the first bending portion 411 can be spaced apart from the other end of the first protruding rib 412. In this way, the first sound absorbing portion 410 can be formed between the first bending portion 411, the first protruding rib 412, and the part of the inner side wall of the first shell 250 between the first bending portion 411 and the first protruding rib 412.

[0062] In one possible implementation, the one end of the first shell 250 extends along the air inlet path, and the first shell 250 is bent outward to form the first bending portion 411 when the height of the first shell 250 is close to that of the fan assembly 300, so that the first bending portion 411 has a semi-enclosed structure, and the opening of the first bending portion 411 is arranged outward. Alternatively, the first protruding rib 412 can be arranged on the inner side wall of the first shell 250, and the one end of the first protruding rib 412 can be arranged toward the opening direction of the first bending portion 411, and the other end of the first protruding rib 412 is arranged inward. It can be understood that the one end of the first bending portion 411 is connected to the first protruding rib 412, and the other end of the first bending portion 411 is arranged outward to form a semi-enclosed structure.

[0063] Reference Figure 3 In another possible implementation, the first bending portion 411 can be indirectly connected to the first shell 250. The first bending portion 411 is spaced apart from the one end of the first shell 250 with the air inlet 220, and the first bending portion 411 is spaced apart from the inner side wall of the first shell 250. In addition, the one end of the first protruding rib 412 can be directly connected to the first shell 250, and the other end of the first protruding rib 412 can be spaced apart from the first bending portion 411. In this way, the first sound absorbing portion 410 can be formed between the first bending portion 411, the first protruding rib 412, and the part of the inner side wall of the first shell 250 between the first bending portion 411 and the first protruding rib 412.

[0064] In another possible implementation, the one end of the first bending portion 411 can be directly connected to the one end of the first shell 250 with the air inlet 220, and the first protruding rib 412 can be indirectly connected to the inner side wall of the first shell 250. Alternatively, the first protruding rib 412 can be spaced apart from the inner side wall of the first shell 250, and one end of the first protruding rib 412 can be spaced apart from the other end of the first bending portion 411. In this way, the first sound absorbing portion 410 can be formed between the first bending portion 411, the first protruding rib 412, and the part of the inner side wall of the first shell 250 between the first bending portion 411 and the first protruding rib 412.

[0065] Reference Figure 3 And Figure 4 On the basis of the above-mentioned embodiments, the first bending portion 411 can also be provided with a bone guide 280. In one possible implementation, the number of bone guides 280 can be several, which is not limited in the embodiments of the present application. In the embodiments of the present application, the several bone guides 280 can be arranged at intervals around the first bending portion 411. It can be understood that when the airflow passes through the first sound-absorbing portion 410, the arrangement of the bone guide 280 can block the noise in the airflow, thereby reducing the transmission of noise sound waves and achieving the effect of reducing noise.

[0066] It can be understood that in the embodiments of the present application, the airflow enters the inner cavity 210 of the shell 200 through the air inlet 220, and is then thrown onto at least part of the inner side wall of the shell 200 by the rotation of the fan assembly 300. During the flow of the airflow, when passing through the first sound-absorbing portion 410, a first airflow wall can be formed between the first protruding rib 412 and the end of the first bending portion 411 bent outward, and the first airflow wall and the inner side wall of the first bending portion 411 can be surrounded by a first cavity. In this way, the airflow can flow along the first airflow wall and then flow out of the air outlet 230. The first cavity can be used to trap the noise in the airflow, thereby achieving the effect of sound absorption and noise reduction.

[0067] Continuing to refer to Figure 2 On the basis of the above-mentioned embodiments, further, the shell 200 can also include a second cover plate 260. The second cover plate 260 covers one end of the second shell 270, and the other end of the second shell 270 can cooperate with the first shell 250 to form the air outlet 230. In one possible implementation, at the air outlet 230, the second shell 270 can be located radially inside the first shell 250. It can be understood that the radial dimension of the first shell 250 is greater than that of the second shell 270, so that the air outlet 230 is formed between the first shell 250 and the second shell 270.

[0068] It can be understood that in the embodiments of the present application, one end of the first shell 250 has the first bending portion 411, and the other end of the first shell 250 is used to cooperate with the second shell 270 located inside the first shell 250 to form the air outlet 230. In one possible implementation, the gap between the first shell 250 and the second shell 270 can form a ring-shaped air outlet 230, so that the air outlet effect is better.

[0069] Continuing to refer to Figure 2On the basis of the above-mentioned embodiments, the sound-absorbing assembly 400 can further include a second sound-absorbing portion 420. The second sound-absorbing portion 420 can be located at one end of the second housing 270 close to the air outlet 230. In one possible implementation, at least part of the inner side wall of the second housing 270 can be arranged to form the second sound-absorbing portion 420, and the second sound-absorbing portion 420 can also have a semi-enclosed structure. In this way, the second sound-absorbing portion 420 is also arranged on the flow path of the air flow, and during the flow of the air flow, the second sound-absorbing portion 420 can trap part of the noise, thereby achieving the effect of sound absorption and noise reduction.

[0070] With reference to the above-mentioned embodiments, Figure 2 On the basis of the above-mentioned embodiments, at least part of the second sound-absorbing portion 420 and at least part of the first sound-absorbing portion 410 can be arranged oppositely. It can be understood that one end of the second housing 270 can be bent in the opposite direction along the direction of the air outlet 230, so that the inner side wall of at least part of the second housing 270 is arranged to form the second sound-absorbing portion 420. In the embodiments of the present application, after the air flow is thrown to the inner side wall of the second housing 270 by the rotation of the fan assembly 300, the air flow passes through the second sound-absorbing portion 420 and the first sound-absorbing portion 410 in turn to achieve the effect of sound absorption and noise reduction, and then flows out of the air outlet 230.

[0071] With reference to the above-mentioned embodiments, Figure 2 On the basis of the above-mentioned embodiments, the second sound-absorbing portion 420 can further include a second bending portion 421 and a second protruding rib 422. The second bending portion 421 can be bent away from the first housing 250, and the second protruding rib 422 can be arranged to extend towards the second bending portion 421, so that the second bending portion 421 and the second protruding rib 422 form the second sound-absorbing portion 420.

[0072] With reference to the above-mentioned embodiments, Figure 2 On the basis of the above-mentioned embodiments, the second bending portion 421 and the second protruding rib 422 can be directly connected to the second housing 270. One end of the second bending portion 421 can be connected to one end of the second housing 270 where the air outlet 230 is formed, and one end of the second protruding rib 422 can be connected to the inner side wall of the second housing 270. In addition, the other end of the second bending portion 421 can be arranged to be spaced apart from the other end of the second protruding rib 422. In this way, the second bending portion 421, the second protruding rib 422, and at least part of the inner side wall of the second housing 270 located therebetween can form the second sound-absorbing portion 420.

[0073] In a possible implementation, one end of the second shell 270 extends along the outer end of the first shell 250, and when the height of the second shell 270 is greater than or equal to the first sound-absorbing part 410, the second shell 270 is bent inward to form a second bent part 421, so that the second bent part 421 is in a semi-closed structure, and the opening of the second bent part 421 is arranged inward. In addition, the second shell 270 can be provided with a second protruding rib 422, so that the second protruding rib 422 can protrude from the inner side wall of the second shell 270, and one end of the second protruding rib 422 can be directed to the opening direction of the second bent part 421, and the second protruding rib 422 is arranged inward. It can be understood that one end of the second bent part 421 is connected to the second protruding rib 422, and the other end of the second bent part 421 is arranged to extend inward to form a semi-enclosed semi-closed structure.

[0074] It can be understood that in the embodiment of the present application, the air flow enters the inner cavity 210 of the shell 200 through the air inlet 220, and then is thrown to the inner side wall of the second shell 270 by the rotation of the fan assembly 300. In the process of air flow, the air flow first passes through the second sound-absorbing part 420, and then passes through the first sound-absorbing part 410, and finally flows out from the air outlet 230. The second protruding rib 422 and the one end of the second bent part 421 bent inward can form a second air flow wall, and the second air flow wall and the inner side wall of the second bent part 421 can surround a second cavity. In this way, the air flow can flow along the second air flow wall, and then flow along the first air flow wall, and finally flow out of the air outlet 230. The first cavity and the second cavity can be used to trap noise in the air flow, thereby further achieving the effect of sound absorption and noise reduction.

[0075] With reference to the above Figure 2 On the basis of the above embodiment, the fan assembly 300 can further include a driving part 310 and an impeller assembly 320. Further, the impeller assembly 320 can include a hub 321 and a plurality of blades 322. In a possible implementation, the number of blades 322 can be several, which is not limited in the embodiment of the present application. In the embodiment of the present application, the hub 321 can be connected to the driving part 310, and one end of the plurality of blades 322 can be sequentially and spacedly arranged around the outer periphery of the hub 321, so that the plurality of blades 322 are arranged in the circumferential direction of the hub 321. It can be understood that the driving part 310 can be used to drive the plurality of blades 322 of the fan assembly 300 to rotate, so that the air flow between the plurality of blades 322 can be transported to the air outlet 230.

[0076] With reference to the above Figure 2On the basis of the above-mentioned embodiments, a plurality of air passages 323 can be formed between the plurality of spaced-apart blades 322. Each of the air passages 323 can be in communication with the air inlet 220 at one end and with the air outlet 230 at the other end. It can be understood that the air flow can enter the fan assembly 300 through the air inlet 220 and along the air passages 323, drive the rotation of the impeller assembly 320 via the driving portion 310, so that the air flow entering the fan assembly 300 in the axial direction flows radially along the air passages 323 to the inner side wall of the second shell 270, and then sequentially flows through the second sound-absorbing portion 420 and the first sound-absorbing portion 410, and finally flows out of the air outlet 230 to achieve air outlet.

[0077] With continued reference to Figure 2 On the basis of the above-mentioned embodiments, the impeller assembly 320 can include a centrifugal impeller. In a possible implementation, when the impeller assembly 320 adopts a centrifugal impeller, in the radial direction, the size of the blade 322 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, and thus the plurality of blades 322 close to one side of the hub 321 can form a concave structure 324. The concave structure 324 can be disposed towards the air inlet 220, and the concave structure 324 cooperates with the air inlet 220.

[0078] With continued reference to Figure 2 On the basis of the above-mentioned embodiments, in a possible implementation, the concave structure 324 formed by the plurality of blades 322 close to one end of the hub 321 can correspond to the bending part of the first bending portion 411, and the plurality of blades 322 away from one end of the hub 321 can correspond to the outwardly disposed end of the first bending portion 411. 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 air flow and providing more air volume, facilitating air guiding, and having a good air suction effect.

[0079] With reference to Figure 5 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. 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 the end away from the hub 321, and the arc-shaped bending direction of the first arc-shaped arm 3221 can be opposite to the arc-shaped bending direction of the second arc-shaped arm 3222. From the axial direction, the blade 322 can have an S-shaped structure.

[0080] With continued reference to Figure 3On the basis of the above-mentioned embodiments, the impeller assembly 320 can further include a mixed flow impeller. In another possible implementation, when the impeller assembly 320 adopts the mixed flow impeller, as shown in Figure 5 the radial dimension of the hub 321 at the end away from the first shell 250 can be greater than the radial dimension of the hub 321 at the end toward the first shell 250, so that the hub 321 has a trumpet shape with an opening toward the second cover plate 260.

[0081] Additionally, as shown in Figure 6 a plurality of blades 322 can be sequentially arranged on the outer side wall of the hub 321. Among them, the two ends of each blade 322 can be respectively bent toward opposite directions, so that each blade 322 has an S-shaped structure, so that the blades 322 are arranged in an inclined manner on the hub 321, and the plurality of blades 322 are sequentially and spaced arranged in parallel on the hub 321.

[0082] With reference to Figure 3 on the basis of the above-mentioned embodiments, wherein the first bent portion 411 can be located at the end of the mixed flow impeller toward the first shell 250, and the first bent portion 411 can surround the circumferential edge of the blade 322, and the first bent portion 411 can be fixedly connected with the first shell 250, so that the first bent portion 411 and the first shell 250 form an integral whole. In a possible implementation, the first bent portion 411 can have a circular ring structure, and the inner side wall of the first bent portion 411 corresponds to the outer edge of the blade 322.

[0083] Referring to Figure 3 and Figure 4 on the basis of the above-mentioned embodiments, wherein in a possible implementation, a plurality of guide bones 280 are spaced apart in the circumferential direction of the first bent portion 411, and the plurality of guide bones 280, the first bent portion 411 and part of the inner side wall of the first shell 250 cooperate to form a plurality of first sound absorption cavities 281. It can be understood that the plurality of first sound absorption cavities 281 are collectively surrounded by the first bent portion 411 and the first protruding rib 412 to form a first sound absorption portion 410. In this way, when the airflow passes through the first sound absorption portion 410, the noise can be blocked into the first sound absorption portion 410, thereby reducing the transmission of noise sound waves and achieving the effect of reducing noise.

[0084] It can be understood that the airflow has a Coanda effect during the process of flowing inside the shell 200. It should be noted that when a flow of fluid (such as air or water) flows through a curved surface, it tends to "stick" to the curved surface rather than continuing to flow in a straight line. This effect is due to the viscosity and pressure difference of the fluid. When the fluid flows through the curved surface, the fluid on one side of the curved surface has a higher speed and a lower pressure, and the fluid on the other side of the curved surface has a lower speed and a higher pressure, causing the fluid to be "sucked" to the curved surface. In the embodiment of the present application, due to the Coanda effect, the airflow can flow out of the air outlet 230 along the outer surface of the second shell 270, thereby guiding and controlling the flow direction of the airflow.

[0085] On the basis of the above-mentioned embodiment, the flow path of the airflow can be: entering the fan assembly 300 through the air inlet 220 and along the air duct 323, driving the rotation of the impeller assembly 320 through the driving part 310, so that the airflow axially entering the fan assembly 300 flows radially to the inner side wall of the second shell 270 along the air duct 323, and then flows out of the air outlet 230, realizing the S-shaped air duct air outlet.

[0086] With reference to the above-mentioned embodiment, Figure 1 On the basis of the above-mentioned embodiment, 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. In a possible implementation manner, the battery can also be arranged in the base 500, which is not limited in the embodiment of the present application.

[0087] On the basis of the above-mentioned embodiment, the bladeless fan 100 can further include an electrical appliance assembly (not shown in the figure). The electrical appliance assembly can include a battery, a display screen, a control panel and the like. In a possible implementation manner, the battery, the display screen and the control panel and the like can be arranged in the base 500. Alternatively, in another possible implementation manner, the battery, the display screen and the control panel and the like can also be arranged in the shell 200. The embodiment of the present application is not limited herein.

[0088] It can be understood that in the embodiment of the present application, the shape of the bladeless fan 100 is different 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 a structure schematic view of a desktop fan, Figure 7 a structure schematic view of a handheld fan, Figure 8 a structure schematic view of a floor fan, which is not limited in the embodiment of the present application.

[0089] With reference to the above-mentioned embodiment, Figure 2 and the like.Figure 4 On the basis of the above-mentioned embodiments, the bladeless fan 100 can further comprise a first sound-absorbing piece 600 and sound-absorbing holes 610. In one possible implementation, the first sound-absorbing piece 600 can be located in the gap between the second housing 270 and the second cover plate 260. In some embodiments, the first sound-absorbing piece 600 can be sound-absorbing cotton. In one possible implementation, the number of sound-absorbing holes 610 can be several, and the number of sound-absorbing holes 610 is not limited in the embodiments of the present application. In the embodiments of the present application, the several sound-absorbing holes 610 can be formed on the side of the second housing 270 facing the first sound-absorbing piece 600, so that the first sound-absorbing piece 600 can absorb the noise in the airflow through the sound-absorbing holes 610. In this way, the bladeless fan 100 can absorb the noise in the airflow through the first sound-absorbing piece 600, thereby reducing the transmission of noise sound waves and achieving the effect of reducing noise.

[0090] In the embodiments of the present application, the sound-absorbing assembly 400 is arranged on the outer shell 200 to trap the noise in the airflow. The bladeless fan 100 can absorb the noise in the airflow through the sound-absorbing assembly 400, thereby reducing the transmission of noise sound waves and achieving the effect of reducing noise.

[0091] 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.

[0092] 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 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.

[0093] 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 property in the singular sense, or can be used to describe a combination of features, structures or properties in the plural sense. Similarly, at least partly according to the context, terms such as "a" or "said" can be understood to convey singular usage or convey plural usage.

[0094] It should be readily understood that "on," "over," and "above" in the present disclosure are to be construed in their broadest sense to mean not only "directly on something" but also to include the meaning of "on something" with intervening features or layers therebetween, and that "over" or "above" not only includes the meaning of "over" or "above something" but also can include the meaning of "over" or "above something" without intervening features or layers therebetween (i.e., directly on something).

[0095] 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.

[0096] Finally, it is to be understood that any other embodiments of the application which fall within the scope of the application are to be embraced by the application and protected by the accompanying claims. Accordingly, no admission is made that any of the related art references are prior art, and none of the references is considered material to the patentability of the application. The application should only be limited in light of the claims and their equivalents.

Claims

1. A bladeless fan, characterized by, The application relates to an air conditioner, which comprises the following parts: a shell with an internal cavity, the shell comprising a first shell and a second shell, the first shell being provided with an air inlet, and the first shell and the second shell being provided with an air outlet, the air inlet and the air outlet being communicated with the internal cavity; a fan assembly in the internal cavity; a sound absorption assembly comprising a first sound absorption part, the first sound absorption part being formed by at least part of the inner side wall of the first shell.

2. The bladeless fan of claim 1, wherein, The first sound absorption part comprises a first bending part and a first protruding rib. The first bending part is bent away from the fan assembly, and the first protruding rib is arranged to extend towards the first bending part, so that the first bending part and the first protruding rib form the first sound absorption part.

3. The bladeless fan of claim 2, wherein, The first bending part and the first protruding rib are directly connected to the first shell. One end of the first bending part is connected to one end of the first shell provided with the air inlet, one end of the first protruding rib is connected to the inner side wall of the first shell, and the other end of the first bending part and the other end of the first protruding rib are arranged to be spaced apart, so that the first bending part, the first protruding rib and part of the inner side wall of the first shell located between the first bending part and the first protruding rib form the first sound absorption part.

4. The bladeless fan of claim 2, wherein, The first bending part is indirectly connected to the first shell, the first bending part is arranged to be spaced apart from one end of the first shell provided with the air inlet and the inner side wall of the first shell, one end of the first protruding rib is directly connected to the first shell, the other end of the first protruding rib is arranged to be spaced apart from the first bending part, and the first bending part, the first protruding rib and part of the inner side wall of the first shell located between the first bending part and the first protruding rib form the first sound absorption part. Alternatively, one end of the first bending part is directly connected to one end of the first shell provided with the air inlet, and the first protruding rib is indirectly connected to the inner side wall of the first shell, the first protruding rib is arranged to be spaced apart from the inner side wall of the first shell, and one end of the first protruding rib is arranged to be spaced apart from the other end of the first bending part, so that the first bending part, the first protruding rib and part of the inner side wall of the first shell located between the first bending part and the first protruding rib form the first sound absorption part.

5. The bladeless fan of claim 2, wherein, The side of the first bending part away from the air inlet is further provided with a plurality of bone guides, and the plurality of bone guides are arranged to be spaced apart and surround the first bending part.

6. The bladeless fan of claim 2, wherein, The sound absorption assembly further comprises a second sound absorption part, at least part of the inner side wall of the second shell forming the second sound absorption part; At least part of the second sound absorption part is arranged to be opposite to at least part of the first sound absorption part.

7. The bladeless fan of claim 6, wherein, The second sound absorption part comprises a second bending part and a second protruding rib. The second bending part is bent away from the first shell, and the second protruding rib is arranged to extend towards the second bending part, so that the second bending part and the second protruding rib form the second sound absorption part.

8. The bladeless fan of claim 7, wherein, The second bending part and the second protruding rib are directly connected to the second shell. One end of the second bending part is connected to one end of the second shell forming the air outlet, one end of the second protruding rib is connected to the inner side wall of the second shell, the other end of the second bending part and the other end of the second protruding rib are arranged at intervals, and the second bending part, the second protruding rib, and at least part of the inner side wall of the second shell located therebetween form the second sound absorption part.

9. The bladeless fan of claim 1, wherein, The fan assembly comprises a driving part and an impeller assembly; The impeller assembly comprises a hub and a plurality of blades, the hub is connected to the driving part, and the plurality of blades are arranged at intervals around the outer periphery of the hub; Air flows into the fan assembly through the air inlet, flows through the first sound absorption part after rotating through the fan assembly, and flows out of the air outlet.

10. The bladeless fan of claim 9, wherein, The impeller assembly comprises a centrifugal impeller, in the radial direction, the size of one end of the blade close to the hub is less than or equal to the size of the other end of the blade away from the hub, so that the side of the plurality of blades close to the hub forms a concave structure, and the concave structure is arranged towards the air inlet. Alternatively, the impeller assembly comprises a mixed flow impeller, the blades are connected to the outer periphery of the hub, the radial size of one end of the hub away from the first shell is greater than the radial size of one end of the hub towards the first shell.

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