Bladeless fan

Abstract

The application provides a bladeless fan, comprising: a shell provided with a cavity, an air inlet and an air outlet communicating with the cavity; a fan assembly arranged in the cavity and used for sucking air into the cavity from the air inlet and blowing the air out from the air outlet; the shell comprises a first component, a second component and a third component, and the third component is arranged on the radial outer side of the first component and the second component; wherein the shell outer wall part forming the air outlet radially increases or radially decreases from back to front, and the radial inner side of the third component is provided with a functional device. The shell outer wall part forming the air outlet radially increases or radially decreases from back to front, and the external airflow is attracted to flow into the radial inner side of the third component through the arrangement of the third component, so that the air volume and blowing range are increased. In addition, the functional device is arranged on the radial inner side of the third component, the components with other functions are integrated on the bladeless fan, and the functions of the bladeless fan are enriched.

Description

Technical Field

[0001] This application relates to the field of fan technology, and more specifically to a bladeless fan with a functional device that doubles the air volume. Background Technology

[0002] Existing bladeless fans, such as those with concealed blades, typically hide the blades within the base, transmitting airflow through the base to the upper outlet component to achieve the bladeless effect. However, the air outlet of bladeless fans is usually quite small, and increasing airflow is a pressing issue that needs to be addressed. Summary of the Invention

[0003] In view of this, this application provides a bladeless fan in which the outer wall portion of the housing forming the air outlet increases or decreases radially from back to front. Through the arrangement of a third component, external airflow is drawn into the radially inner side of the third component, thereby increasing the air volume and blowing range. Furthermore, a functional device is provided on the radially inner side of the third component, integrating components with other functions into the bladeless fan to enrich its functionality.

[0004] This application provides a bladeless fan, comprising: a housing having a cavity, and an air inlet and an air outlet communicating with the cavity; a fan assembly disposed in the cavity for drawing air into the cavity from the air inlet and blowing it out from the air outlet; the housing includes a first component, a second component, and a third component, the third component being disposed radially outside the first component and the second component; wherein, the outer wall portion of the housing forming the air outlet radially increases or decreases radially from back to front, and a functional device is provided on the radially inner side of the third component.

[0005] Furthermore, the functional device is a purification device.

[0006] Furthermore, the functional device is a temperature regulating device.

[0007] Furthermore, the functional device is a display device.

[0008] Furthermore, the first component is provided with the air inlet, the first component and the second component together form the cavity and the air outlet, an air outlet channel is formed between the first component and the second component, and the air outlet is located at the end of the air outlet channel.

[0009] Furthermore, at least a portion of the second component is located radially inside the first component. In the axial direction, the rear end of the third component is located behind the air outlet, and the front end of the third component is located in front of the air outlet. An air intake channel is formed between the first component and the third component, and an air gathering channel is formed between the second component and the third component. The air gathering channel connects the air outlet channel and the air intake channel.

[0010] Furthermore, at least a portion of the second member is provided to protrude forward relative to the first member, and the diameter of the protruding portion of the second member varies.

[0011] Furthermore, the second component completely blocks the fan assembly from the front.

[0012] Furthermore, from back to front, the cross-sectional area of ​​the air intake channel decreases at least partially, and the cross-sectional area of ​​the air gathering channel increases at least partially.

[0013] Furthermore, it also includes a base, which contains a power supply component. The fan assembly includes a motor, and the power supply component is electrically connected to the motor. The motor is a three-phase high-speed motor.

[0014] Compared with existing technologies, the bladeless fan of this application has the following advantages: the outer wall portion of the casing forming the air outlet increases or decreases radially from back to front; and through the arrangement of the third component, external airflow is attracted into the radially inner side of the third component, thereby increasing the air volume and blowing range. Furthermore, functional devices are arranged on the radially inner side of the third component, integrating components with other functions into the bladeless fan, thus enriching the functionality of the bladeless fan. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the bladeless fan of this application;

[0016] Figure 2 This is a cross-sectional view of one embodiment of the bladeless fan of this application;

[0017] Figure 3 yes Figure 2 Enlarged view of section D;

[0018] Figure 4 This is a schematic diagram of the first component of this application;

[0019] Figure 5 This is a simplified schematic diagram of a partially enlarged embodiment of a bladeless fan according to another embodiment of this application;

[0020] Figure 6 This is a simplified schematic diagram of a partially enlarged embodiment of a bladeless fan according to another embodiment of this application;

[0021] Figure 7 This is a simplified schematic diagram of a partially enlarged embodiment of a bladeless fan according to another embodiment of this application;

[0022] Figure 8 This is a schematic diagram of the bladeless fan of this application equipped with functional devices. Detailed Implementation

[0023] To facilitate a better understanding of the purpose, structure, features, and effects of this application, the application will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0024] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component present.

[0025] In this application, the use of terms such as "first" and "second" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0026] In the description of this application, the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] A bladeless fan isn't entirely bladeless; rather, the blades are hidden inside the casing. The core principle is to use a fan assembly to draw in air and then expel it through a specially designed airflow channel. The impeller of a bladeless fan is located inside the casing, which has an air inlet and an air outlet. An internal flow channel is designed within the casing; air from the surrounding area is drawn into the casing through the air inlet, then transported to the air outlet through the flow channel.

[0028] In one embodiment, such as Figure 1 and Figure 2 The diagram shown is a schematic of the bladeless fan of this application. The bladeless fan includes a housing 1 and a fan assembly, which includes a motor 2 and an impeller 3. The housing 1 has a cavity 11, and an air inlet 12 and an air outlet 13 communicating with the cavity 11. The motor 2 and the impeller 3 are located in the cavity 11. The motor 2 drives the impeller 3 to rotate, thereby drawing air into the cavity 11 from the air inlet 12 and blowing it out from the air outlet 13.

[0029] In one embodiment, such as Figure 1 and Figure 2As shown, the housing 1 includes a first component 1A and a second component 1B. The first component 1A has the air inlet 12. The first component 1A and the second component 1B together form the cavity 11 and the air outlet 13. The second component 1B shields the fan assembly from the front. In this embodiment, the second component 1B completely shields the fan assembly from the front, thereby creating the effect of hiding the fan assembly. Furthermore, the shielding avoids direct airflow, creating a gentle, enveloping airflow for greater comfort. Of course, in other embodiments, the second component 1B may also be the part that shields the fan assembly.

[0030] In one embodiment, such as Figure 1 and Figure 2 As shown, the second component 1B is located radially inside the first component 1A, meaning that the first component 1A and the second component 1B are spaced apart to form the air outlet 13. It should be understood that the air outlet 13 can be arranged circumferentially, spaced along the circumference, or only partially. In this embodiment, the air outlet 13 is arranged circumferentially, which provides a wider air outlet range and increases the air outlet area.

[0031] In one embodiment, such as Figures 1 to 3 As shown, the housing 1 further includes a third component 1C, which is located radially outside the first component 1A and the second component 1B. In this embodiment, the outer wall portion of the housing 1 forming the air outlet 13 is a portion of the first component 1A, and the outer wall portion of the housing 1 forming the air outlet 13 increases radially from back to front. An air inlet 14 is formed between the first component 1A and the third component 1C, and the air inlet 14 draws airflow through quickly, thereby increasing the air volume. In other embodiments, the outer wall portion of the housing 1 forming the air outlet 13 may also be a portion of the second component 1B. In other embodiments, the outer wall portion of the housing 1 forming the air outlet 13 may also decrease radially from back to front.

[0032] By incorporating the third component 1C and creating a change in diameter from back to front on the outer wall of the housing 1 forming the air outlet 13, external airflow is drawn into the radially inner side of the third component 1C, thereby increasing airflow and blowing range, and improving the user experience. According to the Venturi effect, low pressure is generated near a high-speed flowing fluid, resulting in adsorption. In this embodiment, the third component 1C is arranged radially outside the first component 1A and the second component 1B, thus forming an air-enhancing ring using the Venturi effect, greatly increasing the airflow. Of course, in other embodiments, the third component 1C may also be arranged circumferentially along the first component 1A and the second component 1B, or only partially.

[0033] In one embodiment, such as Figure 2 and Figure 3 As shown, an air outlet channel 1a is formed between the first component 1A and the second component 1B. The air outlet 13 is located at the end of the air outlet channel 1a, meaning that the air outlet channel 1a ends at the air outlet 13. According to the Venturi effect, a low pressure is generated near a high-speed flowing fluid, resulting in adsorption. The air inlet 14 is located radially outside the air outlet channel 1a. When the airflow through the cavity 11 is blown out from the air outlet 13, a negative pressure is generated, thereby driving the gas flow through the air inlet 14, thus increasing the airflow volume and blowing range.

[0034] In one embodiment, the angle between the axial direction and the horizontal direction of the fan assembly is less than 60 degrees. That is, the fan assembly's shaft is approximately horizontal, and the fan assembly delivers air approximately horizontally. The main activity areas of the human body are concentrated at heights of 0.8–1.5 meters (sitting posture) and 1.5–1.8 meters (standing posture). Horizontal airflow can directly cover this range, avoiding temperature stratification (such as cold air sinking and hot air rising) caused by vertical airflow having to traverse the entire height of the space. Furthermore, compared to bladeless fans with vertical air intake (such as bottom intake), which are prone to drawing in just-exhausted airflow and creating airflow short-circuiting, approximately horizontal air intake / exhaust, through spatial separation design, blocks the return path, effectively improving airflow utilization. Approximately horizontal air intake / exhaust also relatively shortens the airflow path. Compared to vertical air ducts that require multiple turns (such as bottom intake, vertical flow into the top exhaust, annular flow channel at the exhaust, and horizontal exhaust at the top), approximately horizontal air intake / exhaust reduces resistance loss. In this embodiment, the fan assembly is arranged parallel to the horizontal direction along its axial direction, shortening the airflow path, avoiding short-circuit backflow of gas, and better meeting the user's airflow needs. In this embodiment, as... Figure 2 As shown, the fan assembly is arranged with its axial direction parallel to the horizontal direction.

[0035] In one embodiment, such as Figure 2 and Figure 3As shown, at least a portion of the second component 1B is located radially inside the first component 1A. The at least portion of the second component 1B protrudes forward relative to the first component 1A, and the diameter of the protruding portion of the second component 1B varies. In this embodiment, the protruding portion of the second component 1B has a radially narrowed portion; in other embodiments, the protruding portion of the second component 1B may also have a radially enlarged portion. In this embodiment, the front end of the second component 1B extends forward beyond the front end of the first component 1A, a design that better guides airflow. The protruding portion of the second component 1B serves as a guide ridge, and the varying diameter of the protruding portion of the second component 1B, along with the varying diameter of the protruding portion, forms a Coanda effect surface, further attracting airflow and increasing the output air volume.

[0036] In one embodiment, such as Figure 2 and Figure 3 As shown, in the axial direction, the rear end of the third component 1C is located behind the air outlet 13, and the front end of the third component 1C is located in front of the air outlet 13. The third component 1C is an annular structure, and it is fitted radially outside the first component 1A and the second component 1B. An air intake channel 1b is formed between the third component 1C and the first component 1A, and the air intake channel 1b connects to the air outlet 14. An air gathering channel 1c is formed between the second component 1B and the third component 1C. The rear end of the third component 1C covers the rear side of the air outlet 13, forcing the airflow to adhere to its surface and extending the Coanda effect distance. From back to front, the cross-sectional area of ​​the air intake channel 1b gradually decreases, while the cross-sectional area of ​​the air gathering channel 1c gradually increases. The decreasing cross-sectional area of ​​the air intake channel 1b forms a tapering flow channel, which increases the airflow velocity, reduces static pressure, significantly enhances low-pressure adsorption, and improves the external air entrainment. Furthermore, the converging structure constrains airflow diffusion and reduces turbulence. The increased cross-sectional area of ​​the air-gathering channel 1c forms an expanding flow channel, converting high-speed air kinetic energy into static pressure energy, thereby increasing wind pressure and extending the air delivery distance. The air-gathering channel 1c connects the air outlet channel 1a and the air intake channel 1b, forming an integrated path of "acceleration-stabilization-pressurization".

[0037] In one embodiment, such as Figure 2 and Figure 3As shown, the third component 1C includes a first cover 105 and a second cover 106. The radially outwardly exposed portion of the first component 1A is disposed internally and externally with the first cover 105, and the radially outwardly exposed portion of the second component 1B is disposed internally and externally with the second cover 106. The axial length of the first cover 105 is less than the axial length of the second cover 106. The first cover 105 and the radially outwardly exposed portion of the first component 1A form the air intake channel 1b, and the second cover 106 and the radially outwardly exposed portion of the second component 1B form the air gathering channel 1c. The axial length of the air outlet channel 1a is greater than the axial length of the air intake channel 1b, and the axial length of the air gathering channel 1c is greater than the axial length of the air intake channel 1b. The air outlet channel 1a corresponds to the airflow blown out by the fan assembly, and the air gathering channel 1c corresponds to the airflow blown out by the fan assembly and the airflow injected into it. Therefore, the air outlet channel 1a and the air gathering channel 1c are set to be relatively long, so that there is enough stroke for the airflow to be pressurized, sorted, gathered and output, which is conducive to the stable forward output of the airflow.

[0038] In one embodiment, such as Figures 2 to 3 As shown, the radially exposed portion of the second component 1B includes a guiding arc surface 103, which is radially reduced from back to front. That is, the inner wall of the air-gathering channel 1c is radially reduced from back to front, thus the cross-sectional area of ​​the air-gathering channel 1c increases radially from back to front. Simultaneously, the second cover 106 initially remains radially constant from back to front, then increases radially. The outer wall of the air-gathering channel 1c has a radially increasing portion from back to front, further increasing the cross-sectional area of ​​the air-gathering channel 1c. This facilitates the stable forward flow of the converged strong airflow, preventing backflow caused by excessive wind pressure.

[0039] In one embodiment, such as Figures 2 to 3 As shown, the radially exposed portion of the first component 1A increases radially from back to front, meaning the inner wall of the air intake channel 1b increases radially from back to front. Therefore, the cross-sectional area of ​​the air intake channel 1b decreases radially from back to front. Simultaneously, the first cover 105 initially decreases radially from back to front, then remains unchanged radially. The outer wall of the air intake channel 1b has a radially decreasing portion from back to front, further reducing the cross-sectional area of ​​the air intake channel 1b. This facilitates the formation of negative pressure in the air intake channel 1b, thereby enhancing its ability to draw in external airflow.

[0040] In one embodiment, such as Figures 2 to 3As shown, the first cover portion 105 and the second cover portion 106 are connected. The portion of the first cover portion 105 adjacent to the second cover portion 106 is radially unchanged, and the portion of the second cover portion 106 adjacent to the first cover portion 105 is also radially unchanged. The portion where the first cover portion 105 and the second cover portion 106 are connected is also the location where the air outlet channel 1a and the air inlet channel 1b converge to form the air gathering channel 1c. Therefore, keeping the radial direction of this portion corresponding to the third component 1C unchanged helps stabilize the airflow and avoid excessive fluctuations that could cause turbulence. It should be understood that in this embodiment, the portion of the first cover portion 105 and the portion of the second cover portion 106 are integrally formed. However, in other embodiments, the portion of the first cover portion 105 and the portion of the second cover portion 106 may also be separately formed. In other embodiments, the first cover portion 105 and the second cover portion 106 may also be unconnected or only partially connected. It should be understood that even when the first cover 105 and the second cover 106 are not connected or are only partially connected, the first cover 105 can still form the air intake channel 1a, and the second cover 106 can still form the air gathering channel 1c. Therefore, the first cover 105 and the second cover 106 still have the function of injecting and guiding airflow.

[0041] In addition, the first cover 105 may be assembled from multiple shell parts, and the second cover 106 may be assembled from multiple shell parts; or the first cover 105 may be integrally formed, and the second cover 106 may be integrally formed, without limitation.

[0042] In one embodiment, such as Figures 2 to 3 As shown, the first component 1A, the second component 1B, and the third component 1C are coaxially arranged, and each of the first component 1A, the second component 1B, and the third component 1C has an annular portion. That is to say, the air outlet 13, the air outlet channel 1a, the air intake channel 1b, and the air gathering channel 1c are all coaxially annularly arranged, which can form the largest possible air outlet area and air outlet intensity, providing users with a better air blowing experience.

[0043] In one embodiment, such as Figures 2 to 4As shown, the fan assembly is disposed within the cavity 11. The fan assembly includes the motor 2 and the impeller 3. The motor 2 is fixedly mounted on the second component 1B, and the impeller 3 is connected to the shaft of the motor 2. The motor 2 drives the impeller 3 to rotate at high speed. In this embodiment, the impeller 3 can generate radial airflow, and the air outlet channel 1a connects to the air outlet portion of the impeller 3. The first component 1A is provided with the air inlet 12 corresponding to the impeller 3. When the impeller 3 rotates, air is drawn into the cavity 11 from the air inlet 12 on the first component 1A, and the radial airflow generated by the impeller 3 enters the air outlet channel 1a. Since the cross-sectional area of ​​the air outlet channel 1a gradually decreases from the air outlet portion of the impeller 3 to the air outlet 13, forming a tapered flow channel (similar to a Laval nozzle), the air is compressed and accelerated within the air outlet channel 1a, and then blown out from the air outlet 13. Furthermore, the continuously decreasing cross-sectional area suppresses boundary layer separation, reducing backflow at the outlet of the impeller 3 and ensuring that high-speed airflow enters the outlet channel 1a. Simultaneously, external air enters the converging channel 1c through the induced draft channel 1b, which gathers the external air with the air in the outlet channel 1a, further enhancing the airflow effect.

[0044] In one embodiment, such as Figures 2 to 4 As shown, the air outlet channel 1a is located on the radial outer side of the impeller 3, and the air outlet channel 1a is bent in the radial direction. By bending the air outlet channel 1a in the radial direction, the overall thickness of the bladeless fan is reduced, making the bladeless fan thinner.

[0045] In this embodiment, the impeller 3 is a centrifugal impeller 3. In other embodiments, the impeller 3 may also be a diagonal flow impeller 3 or a mixed flow impeller 3, with axial air intake and diagonal air outlet.

[0046] In one embodiment, such as Figures 2 to 4 As shown, the first component 1A is generally annular, with the air inlet 12 formed in the middle of the first component 1A. A rear cavity 101 is formed in the radial direction near the air inlet 12 of the first component 1A. The rear cavity 101 can be used to house components and also has the function of absorbing vibration and noise. The rear cavity 101 has a through slot into which the air inlet cover 102 is engaged. The first component 1A also has a plurality of guide vanes 15 facing the air outlet channel 1a, and the plurality of guide vanes 15 extend radially in a spiral curve. It should be understood that in this embodiment, the plurality of guide vanes 15 are formed in the first component 1A. In other embodiments, the plurality of guide vanes 15 may also be formed in the second component 1B, or the plurality of guide vanes 15 may be individually formed and installed between the first component 1A and the second component 1B.

[0047] In one embodiment, such as Figure 2 As shown, a guide member 16 is connected to the front end of the second component 1B, and the diameter of the guide member 16 varies. The guide member 16 connects to the second component 1B, and at least a portion of the guide member 16 extends forward beyond the front end of the third component 1C. In this embodiment, the outer surface of the guide member 16 is at least partially radially narrowed from back to front. The guide member 16 can further guide the airflow blown out from the air-gathering channel 1c, making the airflow more stable and concentrated, and improving the user experience. In addition, the outer surface of the guide member 16 connects to the outer surface of the second component 1B, and both the outer surface of the guide member 16 and the outer surface of the second component 1B are curved surfaces, which can guide the airflow to flow forward quickly close to the surface.

[0048] In one embodiment, such as Figure 2 and Figure 3 As shown, the second component 1B and the air guide 16 together are roughly in the shape of a double-layered bowl. The second component 1B mainly forms the bottom wall of the inner dish and part of the side wall of the outer dish, while the air guide 16 mainly forms the bottom wall of the outer dish and part of the side wall of the outer dish. The second component 1B includes a guiding arc surface 103, and the air guide 16 includes a guiding surface 161. The guiding arc surface 103 and the guiding surface 161 are connected to guide the airflow along the wall. The fan assembly is installed on the portion of the second component 1B facing the cavity 11, and a front cavity 104 is formed between the inner and outer dishes, which can be used to house electronic components.

[0049] For example, the front cavity 104 houses the display component 6, thereby displaying the operating parameters of the bladeless fan outward through the air guide 16. These operating parameters include, but are not limited to, the operating mode, current wind speed, and current battery level. It should be understood that the display component 6 may include touchscreen operation functionality, allowing users to adjust the bladeless fan via touch sensing. Additionally, the front cavity 103 also has vibration and noise absorption functions. Of course, the outer disc bottom of the air guide 16 can be concave towards the air intake direction; it can also be convex towards the air outlet direction; or it can be partially concave towards the air intake direction and partially convex towards the air outlet direction; or it can be neither concave nor convex.

[0050] In one embodiment, such as Figures 1 to 4As shown, the distance between the third component 1C and the first component 1A is greater than the distance between the first component 1A and the second component 1B at the air outlet 13, thus forming an inner high-speed flow channel and an outer diversion zone. At the air outlet 13, the second component 1B is located radially inside the first component 1A, and the ratio of the distance between the first component 1A and the second component 1B at the air outlet 13 to the distance between the third component 1C and the first component 1A is 1 / 4 to 1 / 2. The close spacing between the first component 1A and the second component 1B at the air outlet 13 forms a high-pressure acceleration channel, where the airflow velocity increases, achieving directional injection of core wind power. The large distance between the third component 1C and the first component 1A forms a low-pressure diffuser cavity, which adsorbs surrounding air through the Coanda effect, diverting and driving the surrounding environmental airflow, significantly increasing the air supply coverage. In addition, the large-spacing diversion cavity acts as a vortex dissipation zone, converting the turbulent kinetic energy of the inner high-speed airflow into static pressure, reducing the outlet turbulence intensity and aerodynamic noise.

[0051] In some embodiments, the distance between the third component 1C and the first component 1A may be 8-18 mm, and the distance between the first component 1A and the second component 1B at the air outlet 13 may be 2.5-6.5 mm.

[0052] In one embodiment, such as Figure 5 As shown, the distance between the third component 1C and the second component 1B is greater than the distance between the first component 1A and the second component 1B at the air outlet 13, thereby forming an inner high-speed flow channel and an outer drainage area. At the air outlet 13, the second component 1B is located radially inside the first component 1A, and the ratio of the distance between the first component 1A and the second component 1B at the air outlet 13 to the distance between the third component 1C and the second component 1B is 1 / 4 to 1 / 2. At least a portion of the second component 1B protrudes forward relative to the first component 1A, and the protruding portion of the second component 1B has a radially increased portion. Similarly, an inner high-speed flow channel is formed between the first component 1A and the second component 1B. Even though the protruding portion of the second component 1B has a radially increased portion, the distance between the third component 1C and the second component 1B is still greater than the distance at the air outlet 13, thus still having a good drainage effect.

[0053] In one embodiment, such as Figure 6As shown, the air outlet 13 is arranged rearward. The distance between the third component 1C and the second component 1B is greater than the distance between the first component 1A and the second component 1B at the air outlet 13, thereby forming an inner high-speed flow channel and an outer diversion zone. The first component 1A is located radially inside the second component 1B, and the ratio of the distance between the first component 1A and the second component 1B at the air outlet 13 to the distance between the third component 1C and the second component 1B is 1 / 4-1 / 2. The close spacing between the first component 1A and the second component 1B at the air outlet 13 forms a high-pressure acceleration channel, where the airflow velocity is increased, achieving directional injection of core wind power. In this embodiment, the second component 1B has a radially narrowed portion along the air outlet direction, and the large distance between the third component 1C and the second component 1B forms a low-pressure diffuser cavity, which adsorbs surrounding air through the Coanda effect, diverting and driving the surrounding environmental airflow, significantly increasing the air supply coverage. In addition, the large-spaced air intake chambers act as vortex dissipation zones, converting the turbulent kinetic energy of the high-speed airflow in the inner layer into static pressure, reducing the intensity of turbulence at the outlet and decreasing aerodynamic noise.

[0054] In one embodiment, such as Figure 7 As shown, the air outlet 13 is arranged rearward. The distance between the third component 1C and the first component 1A is greater than the distance between the first component 1A and the second component 1B at the air outlet 13, thereby forming an inner high-speed flow channel and an outer drainage area. The first component 1A is located radially inside the second component 1B, and the ratio of the distance between the first component 1A and the second component 1B at the air outlet 13 to the distance between the third component 1C and the first component 1A is 1 / 4 to 1 / 2. Similarly, an inner high-speed flow channel is formed between the first component 1A and the second component 1B. Even though the first component 1A has a radially increasing portion along the air outlet direction, the distance between the third component 1C and the first component 1A is still larger than the distance at the air outlet 13, thus still having a good drainage effect.

[0055] It should be understood that in the accompanying drawings of this application, the arrows are only simple indications of the general path of the airflow, but are not limited to what the arrows indicate.

[0056] In one embodiment, such as Figure 1 and Figure 2As shown, the bladeless fan also includes a base 4. The base 4 is located below the housing 1. The third component 1C connects the base 4 and the first component 1A, or the third component 1C connects the base 4 and the second component 1B, making the overall structure more stable. A power supply component 5 is provided inside the base 4. The power supply component 5 is electrically connected to the motor 2 via wires, providing power to drive the motor 2 and ensuring the normal operation of the bladeless fan. A rotating structure can also be provided between the third component 1C and the base 4, allowing the third component 1C to rotate horizontally relative to the base 4. This means the air outlet of the bladeless fan can oscillate horizontally relative to the base 4, preventing the air outlet from blowing directly at the user for extended periods.

[0057] In one embodiment, such as Figure 1 and Figure 2 As shown, the base 4 of this application houses the display component 6, thereby displaying the operating parameters of the bladeless fan outwards on the base 4. These operating parameters include, but are not limited to, operating mode, current wind speed, and current battery level. It should be understood that the display component 6 may include touchscreen functionality, allowing users to adjust the bladeless fan via touch.

[0058] In one embodiment, the motor 2 described in this application is a three-phase high-speed motor 2, which can stably and continuously provide a high speed of 12000 R / min or higher. In actual use, the user places the bladeless fan in a suitable location, and after connecting the power supply, the three-phase high-speed motor 2 drives the impeller 3 to rotate. Air flows according to the designed airflow channel, blowing a strong, uniform, and comfortable breeze from the air outlet 13. Through the optimized design of the structure of each component and the airflow channel of the bladeless fan, the performance and usage effect of the product are effectively improved.

[0059] In one embodiment, the bladeless fan further includes a functional device 7, which is disposed radially inside the third component 1C. Specifically, as... Figure 8As shown, the functional device 7 can be disposed between the third component 1C and the first component 1A. Alternatively, the functional device 7 can also be disposed between the third component 1C and the second component 1B. In this embodiment, the functional device 7 can be disposed in the air intake channel 1b or the air gathering channel 1c, utilizing the Coanda effect to direct airflow through the functional device 7. The functional device 7 can be one or more of a purification device, a temperature control device, and a display device. By integrating the functional device 7, the functionality of the bladeless fan is enriched. The purification device can be selected to sterilize, ionize, or deodorize the airflow; the temperature control device can be selected to regulate the airflow temperature, providing a cooling or heating effect; the display device can be one or more of a digital display, a light display, and an image display. In other embodiments, the functional device 7 can also cover the entire radially inner area of ​​the third component 1C, thereby making the appearance more bladeless and technologically advanced.

[0060] It should be understood that the bladeless fan of this application can have air intake and exhaust in a generally horizontal direction or in a vertical direction. Depending on its size, proportions, etc., the bladeless fan of this application can be adapted to be a handheld fan, desktop fan, floor fan, wall-mounted fan, etc., and is not limited to this example.

[0061] The above detailed description is only an illustration of the preferred embodiment of this application and is not intended to limit the patent scope of this application. Therefore, all equivalent technical changes made using the content of this invention's specification and illustrations are included within the patent scope of this invention.

Claims

1. A bladeless fan, characterized in that, include: The housing has a cavity, and an air inlet and an air outlet communicating with the cavity; A fan assembly, disposed in the cavity, is used to draw air into the cavity from the air inlet and blow it out from the air outlet; The housing includes a first component, a second component, and a third component, wherein the third component is located radially outside the first component and the second component; The outer wall portion of the housing forming the air outlet increases or decreases radially from back to front, and a functional device is provided on the radially inner side of the third component.

2. The bladeless fan as described in claim 1, characterized in that: The functional device is a purification device.

3. The bladeless fan as described in claim 1, characterized in that: The functional device is a temperature regulation device.

4. The bladeless fan as described in claim 1, characterized in that: The functional device is a display device.

5. The bladeless fan as described in claim 1, characterized in that: The first component is provided with the air inlet, and the first component and the second component together form the cavity and the air outlet. An air outlet channel is formed between the first component and the second component, and the air outlet is located at the end of the air outlet channel.

6. The bladeless fan as described in claim 5, characterized in that: At least a portion of the second component is located radially inside the first component. In the axial direction, the rear end of the third component is located behind the air outlet, and the front end of the third component is located in front of the air outlet. An air intake channel is formed between the first component and the third component, and an air gathering channel is formed between the second component and the third component. The air gathering channel connects the air outlet channel and the air intake channel.

7. The bladeless fan as described in claim 6, characterized in that: At least a portion of the second member is provided to protrude forward relative to the first member, and the diameter of the protruding portion of the second member varies.

8. The bladeless fan as described in claim 6, characterized in that: The second component completely blocks the fan assembly from the front.

9. The bladeless fan as described in claim 6, characterized in that: From back to front, the cross-sectional area of ​​the air intake channel decreases at least partially, and the cross-sectional area of ​​the air gathering channel increases at least partially.

10. The bladeless fan as described in claim 1, characterized in that: It also includes a base, in which a power supply component is provided, and the fan assembly includes a motor. The power supply component is electrically connected to the motor, and the motor is a three-phase high-speed motor.

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