Portable bladeless fan

Abstract

To provide a portable bladeless fan that blows wind with high wind pressure, high wind power, and low noise.SOLUTION: A portable bladeless fan includes: a housing 1 in which a suction part 11 is provided on the rear side, a discharge part 12 is provided on the front side, and the suction part 11 and the discharge part 12 communicate with each other in the housing 1; a mixed flow fan 2 provided in the housing 1, and for generating an air flow by rotating around a rotating shaft 212; and a pressurizing member 3 connected to a front side portion of the housing 1, located on the front side of the mixed flow fan 2, and including a pressurizing seat 31 and a plurality of second blades 32.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present application relates to the technical field of electric fans, and more particularly to a portable bladeless fan with a large air volume and high wind pressure. [Background technology]

[0002] Axial flow fans are commonly seen in everyday life. Axial flow fans are characterized by the fact that the path from intake to outlet is almost straight, without any radial deviation. Air enters the axial fan from the intake end in an axial direction and then leaves the outlet end in an axial direction. This method reduces wind resistance and reduces airflow loss. In other words, those skilled in the art have, by default, manufactured axial flow fans using axial flow blades to minimize airflow loss. Over time, this has become a consensus and a technical prejudice that is difficult to change. Therefore, those skilled in the art have no idea how to solve this technical problem and have simply accepted the use of axial flow fans as a sure thing. This reduces R&D investment, reduces costs, and allows for quick sales of fan products, allowing for capital market profits.

[0003] However, unlike the commercial philosophy of other companies in this field, which is to pursue low development costs, quickly release products, and make profits by dominating the market, the inventors of this application have conducted extensive research in the field of electric fans, thoroughly investigating and ascertaining fluid theory, the market for electric fan products, users' pain points during use, and user needs. Through further research into the industry, they have found that, taking handheld fans or general desk fans as an example, conventional axial fans have low wind resistance and low airflow loss, but do not take into account other technical issues, such as low wind pressure and short airflow distance. In other words, there is no airflow loss, but there is no additional capacity to replenish, and it is difficult to guarantee the airflow distance. As a result, the typical usage distance of a general portable fan is about 1 to 1.5 meters, and if you are a little further away, you will not be able to experience the refreshing feeling of being cooled by the breeze. Furthermore, because the blades of an axial fan are visible, infants and young children are prone to cutting their fingers when using it, and if a foreign object such as a toy or chopsticks is placed in the blades, they may break or shatter, causing injury to the user. Thus, conventional axial fans cannot fully meet users' demands for safe use.

[0004] The inventors of this application found that although some portable fans have overcome the problem of low wind pressure by adopting centrifugal blades, the wind enters the centrifugal fan axially from the intake end and then leaves the outlet end radially, resulting in large changes in wind direction, significant air volume loss, and an airflow effect that does not meet user needs.

[0005] As is well known in the industry, Dyson has released a bladeless fan, but it uses an ultra-high-speed blower to maximize airflow, and its volume generally reaches 30*30*150cm3 (cubic centimeters), occupying a very large space, making it difficult to use and difficult to carry. Furthermore, Dyson's fan products generally cost between 3,000 and 8,000 yuan, making them very expensive for ordinary households and individuals and even luxury items, and therefore of no value to ordinary users.

[0006] In recent years, products and patents imitating Dyson's bladeless fans have appeared, some of which are handheld and portable. However, these products either fail to achieve a slim profile, or are so slim that they sacrifice air volume and power, failing to meet the needs of users. In particular, products using inclined flow fans produce sharp, difficult-to-hear motor and wind noises that are unacceptable to users and therefore fail to achieve the high performance of these fan products.

[0007] Due to the above technical problems and technical biases, conventional portable fans cannot meet the usage needs of users. At the same time, as living standards improve and the application scenarios of fans become more diverse, people's demands for portable fans that can be carried around are also increasing. After diligently studying the above technical problems, technical biases, user needs, safety issues in use, and market products, the inventors of the present application have, after several years of research and experimentation, designed a small-volume portable fan with a structure that provides large air volume, high wind pressure, and low noise, and have presented a portable bladeless fan that solves the above problems in the field. Summary of the Invention

[0008] The main object of this application is to provide a portable bladeless fan that generates a diagonal flow by installing a mixed flow fan in a housing and rotating it, while simultaneously pressurizing the diagonal flow with a pressure member and adjusting the diagonal flow with a plurality of second blades, thereby blowing out air with high wind pressure and force and low noise. [Brief explanation of the drawings]

[0009] The present application will describe embodiments in conjunction with the drawings. The drawings in this application are used only to describe examples for illustrative purposes. Those skilled in the art can easily make other examples by following the steps described in the following description without departing from the principles of the present application.

[0010] [Figure 1] 1 is a perspective view of a first embodiment of a portable bladeless fan according to the present application; [Figure 2] 1 is an exploded schematic view of a first embodiment of a portable bladeless fan according to the present application, viewed from one angle. [Figure 3] 1 is an exploded schematic view of the first embodiment of the portable bladeless fan according to the present application from another angle. FIG. [Figure 4] 1 is a cross-sectional view in one direction of a first embodiment of a portable bladeless fan according to the present application. [Figure 5] 2 is a cross-sectional view of the first embodiment of the portable bladeless fan according to the present application in another direction. FIG. [Figure 6] 3 is a schematic diagram of a second housing, a pressure member, a front half of a handle, and a wire pressure plate in the portable bladeless fan according to the present application. FIG. [Figure 7] 1 is a perspective schematic view of a portable bladeless fan according to the present application with the first housing removed; [Figure 8] FIG. 2 is a perspective view of a second embodiment of a portable bladeless fan according to the present application. [Figure 9] 1 is an exploded schematic view of a second embodiment of a portable bladeless fan according to the present application, viewed from one angle. [Figure 10] 10 is an exploded schematic view of a second embodiment of the portable bladeless fan according to the present application from another angle. FIG. [Figure 11] 1 is a cross-sectional view in one direction of a second embodiment of a portable bladeless fan according to the present application. [Figure 12] 10 is a cross-sectional view of the second embodiment of the portable bladeless fan according to the present application in another direction. FIG. [Figure 13] 3 is a schematic diagram of a second housing, a pressure member, a front half of a handle, and a wire pressure plate in the portable bladeless fan according to the present application. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following clearly and completely describes the technical solutions in the embodiments of the present application, in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific embodiments described herein are merely for the purpose of interpreting the present application, and do not limit the present application. It should be further explained that, for ease of description, the drawings show only the parts relevant to the present application, rather than all structures. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative effort are within the scope of protection of the present application.

[0012] In this application, terms such as "first," "second," etc. are used to distinguish between different objects and not to describe a particular order. Also, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may also include unlisted steps or units, or optionally include other steps or units inherent to the process, method, product, or apparatus.

[0013] When referring to an "embodiment" in this specification, it means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. Appearances of this phrase in various places in the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive independent or alternative embodiments of other embodiments. As those skilled in the art will clearly and implicitly understand, the embodiments described herein can be combined with other embodiments.

[0014] 1 to 7 are schematic diagrams of a first embodiment of a portable bladeless fan 100 according to the present application. In this embodiment, the portable bladeless fan 100 is a handheld bladeless fan having a handle 5 for a user to hold. Of course, the portable bladeless fan 100 may be a clamp fan equipped with a clamp, a flexible fan equipped with a bending member for winding, a desk fan equipped with a stand, a floor-standing fan equipped with a telescopic stand, or a mini fan equipped with no handle 5, clamp, bending member, stand, telescopic stand, etc., and is not limited thereto.

[0015] In another embodiment, the handle 5 may further be provided with a semiconductor cooling element (not shown, the same applies below), allowing the user to carry the portable bladeless fan 100 around by using the handle 5, and the semiconductor cooling element can automatically adjust the cooling temperature based on the temperature of the contact point between the user and the handle 5, improving the user's comfort when carrying it. It should be understood that the portable bladeless fan 100 may be used for blowing air and dissipating heat, and the semiconductor cooling element may be used for cooling, or if a heating element is added to the portable bladeless fan 100 for heating and heat retention, the semiconductor cooling element may be used for heating and heat retention, respectively.

[0016] As shown in FIGS. 1 to 3 , the portable bladeless fan 100 includes a housing 1, a pressurizing member 3, and a mixed-flow fan 2. The radial cross-sectional contours of the housing 1, the pressurizing member 3, and the mixed-flow fan 2 are all approximately circular. The pressurizing member 3 is connected to the front portion of the housing 1, and the pressurizing member 3 and the housing 1 are integrally molded. Alternatively, the pressurizing member 3 and the housing 1 may be molded separately and then attached to the housing 1. The mixed-flow fan 2 is disposed within the housing 1 and connected to the rear side of the pressurizing member 3. The mixed-flow fan 2 rotates around a rotation axis 212 to generate airflow. The direction perpendicular to and penetrating the rotation axis 212 is the radial direction, and the direction parallel to the rotation axis 212 is the axial direction.

[0017] As shown in FIGS. 2 to 4, an intake section 11 is provided at the rear side of the housing 1, and an outlet section 12 is provided at the front side, and the intake section 11 and the outlet section 12 are connected within the housing 1. The intake section 11 is provided on an intake plate 13, and the outlet section 12 is located between the front end of the pressing member 3 and the front end of the housing 1. The handle 5 is formed at the lower end of the housing 1 so that the user can hold it by hand. The housing 1 includes a first housing 1a and a second housing 1b that fit together from front to back, and the first housing 1a first extends radially rearward from the radially outer side of the intake section 11, increasing in diameter, and then extends radially forward in the opposite direction, increasing in diameter, and the second housing 1b extends radially from rear to front, decreasing in diameter. Here, the first housing 1a initially extends radially rearward only slightly, while the entire first housing 1a continues to extend radially forward, thereby presenting an overall arc-like shape and creating a beautiful appearance. The first housing 1a initially extends radially rearward, allowing a portion of the air intake plate 13 to be accommodated within the first housing 1a, preventing the air intake plate 13 from becoming too prominent. The ratio of the length of the front and rear ends of the first housing 1a to the length of the front and rear ends of the second housing 1b is 0.9 to 1 or 1 to 1.2, which achieves compactness while also achieving a reasonable balance between air volume and air pressure. A ratio close to 1:1 further enhances the appearance of the first housing 1a and the second housing 1b.

[0018] As shown in Figures 2 to 4, the mixed-flow fan 2 includes a rotating base 21 and multiple first blades 22. The rotating base 21 includes an airflow guide surface 211 that increases radially from rear to front. The multiple first blades 22 are connected to the airflow guide surface 211 and spaced apart, and are equidistant from the airflow guide surface 211. The first blades 22 extend spirally at a predetermined angle along the circumferential direction of the airflow guide surface 211 from rear to front. When viewed from the rear, the distance between any two adjacent first blades 22 at their front ends is larger than the distance between their rear ends, which is advantageous for increasing the amount of air intake. The rotating base 21 is approximately frustum-shaped, and the radial cross-sectional area of ​​the rear end of the rotating base 21 is smaller than the radial cross-sectional area of ​​the front end, and the rotating base 21 has a relatively large radial cross-section at its front end. The rotating seat 21 further includes an extending wall 213 connected to the inner wall of the rotating seat 21 and extending forward, and the extending wall 213 and the rotating seat 21 are collectively arranged in a surrounding manner to form a first cavity 214 that opens forward.

[0019] 4 and 5, at least a portion of the airflow guiding surface 211 may be recessed toward the rotation axis 212, and it should be understood that at least a portion of the airflow guiding surface 211 may be recessed toward the rotation axis 212 so that the mixed flow fan 2 can gather and expand the wind to generate high wind pressure. Of course, the airflow guiding surface 211 may be an inclined plane or may at least partially protrude away from the rotation axis 212, and is not limited thereto.

[0020] As shown in Figures 3 to 5, the pressure member 3 includes a pressure seat 31 and a plurality of second blades 32, the pressure seat 31 includes a pressure surface 311 that increases at least partially radially from rear to front, the plurality of second blades 32 are connected to the pressure surface 311 and arranged at intervals, and the plurality of second blades 32 are arranged equidistantly on the pressure surface 311, and the plurality of second blades 32 are connected to the housing 1. After the diagonal airflow generated by the mixed flow fan 2 flows to the pressurizing surface 311, the multiple second blades 32 straighten and transform the airflow to form a direct current that blows parallel to the rotating shaft 212, thereby increasing the blowing distance, reducing turbulence, noise, and vibration, reducing the noise generated by turbulent interference, and realizing noise reduction, transforming sharp sounds into quieter sounds, thereby reducing the noise of the mixed flow fan 2, greatly improving static pressure, reducing energy consumption, and strengthening the concentration of the blowing of the mixed flow fan 2. The second blades 32 equalize the airflow generated by the mixed flow fan 2 and increase the wind pressure. The pressurizing base 31 is connected to the housing 1 via the second blades 32, and the rotating base 21 is connected to the pressurizing base 31 via a fixed fitting structure, and the mixed flow fan 2 is relatively fixed within the housing 1 by the pressurizing base 31. Here, the radius of the maximum radius surface at the front end of the pressure member 3 is 21.3 to 22 mm (millimeters, the same applies below), and it is easy to carry around under conditions where sufficient air volume and air pressure are ensured.

[0021] 3 to 5, at least a portion of the pressure surface 311 increases in the radial direction from rear to front, and at the same time, at least a portion of the pressure surface 311 is recessed toward the rotation axis 212, and the air guide surface 211 and at least a portion of the pressure surface 311 are recessed in the radial direction to form a concave surface, which absorbs noise from a portion of the fluid. Specifically, the pressure surface 311 increases in the radial direction as a whole from rear to front, but of course, in other embodiments, the pressure surface 311 may first extend forward parallel to the rotation axis 212 from rear to front, and then further increase in the radial direction, or first decrease in the radial direction, and this is not a limitation.

[0022] 3 to 5, the pressure seat 31 also has a generally frustum shape, with the radial cross-sectional area of ​​the rear end of the pressure seat 31 being smaller than that of the front end, and the pressure seat 31 having a larger radial cross-section at its front end. The radius of the radial cross-section of the pressure seat 31 at its front end is 21.3 to 22 mm, which expands the airflow area while ensuring sufficient air volume and pressure. The air guide surface 211 and the pressure surface 311 increase in diameter overall to form a trumpet shape, forming an outwardly expanding pressure slope. The thickness of the pressure seat 31 in the front-to-rear direction is 9.5 to 14.5 mm, greatly increasing the pressure stroke of the airflow. The pressure slope, in conjunction with the housing 1, converts sharp noise into a mellow sound. The pressure seat 31 increases radially from the rear to the front, while the second housing 1b extends while decreasing radially from the rear to the front. In other words, the second housing 1b and the pressure seat 31 extend forward and at the same time approach each other, and the air is blown out from the slit formed by the front end of the pressure seat 31 and the front end of the second housing 1b, which is advantageous for increasing the air force, air pressure and air blowing distance.

[0023] 4 and 5, the rotary seat 21 and the pressure seat 31 are spaced apart in the axial direction, and the airflow guide surface 211 and the pressure surface 311 are spaced apart in the axial direction. The axial distance between the rotary seat 21 and the pressure seat 31 and the axial distance between the airflow guide surface 211 and the pressure surface 311 are both 1 to 4 mm, allowing the air generated by the mixed flow fan 2 to flow smoothly to the pressure surface 311 and reducing noise caused by turbulence. The radial cross section at the front end of the rotary seat 21 and the radial cross section at the rear end of the pressure seat 31 are both circular, with a very small difference in radius—less than 1 mm in this embodiment—allowing the air generated by the mixed flow fan 2 to flow smoothly to the pressure surface 311.

[0024] As shown in Figures 3 to 5, the pressure seat 31 has a second cavity 313 that opens rearward. The extension wall 213 is inserted forward into the second cavity 313, and the first cavity 214 and the second cavity 313 at least partially overlap in the radial direction, reducing the occupied space. The mixed flow fan 2 further includes a motor 23, which is an outer rotor brushless motor 23 housed in the first cavity 214 and the second cavity 313. The openings of the first cavity 214 and the second cavity 313 are shielded from each other, thereby isolating the noise of the motor 23 and wind noise and converting sharp noise into a muffled sound. The fixed fitting structure between the mixed flow fan 2 and the pressure member 3 is also housed in the first cavity 214, making efficient use of space. The fixed fitting structure specifically includes the rotating shaft 212 protruding forward from the first cavity 214 and a protruding post 312 protruding rearward from the second cavity 313. The rotating shaft 212 is inserted into the protruding post 312 and fixed using a bearing. The outer rotor brushless motor 23 has a service life of up to 15,000 hours, and since there are no electric sparks generated during operation of the brushed motor 23, interference with the remote control of wireless electrical devices due to electric sparks can be greatly reduced. When operating in a brushless manner, friction is greatly reduced, allowing for smooth operation and a high noise reduction effect.

[0025] As shown in Figures 4 and 5, a safe pressure distance is provided between the suction plate 13 and the rear end of the rotating seat 21, allowing the suction plate 13 to deform under maximum pressure within the pressure range permitted by the material. In this embodiment, the distance between the suction plate 13 and the rear end of the rotating seat 21 is 5.5 to 7.5 mm, providing space for the rear end to accommodate large airflow and allowing the suction plate 13 to deform under maximum pressure when exposed to large airflow. The radial cross-sectional area of ​​the suction plate 13 is equal to or greater than the maximum radial cross-sectional area of ​​the rotating seat 21, ensuring sufficient airflow and reducing noise, converting sharp noises into a hushed sound. The radial cross-sectional area of ​​the suction plate 13 is equal to or less than the radial cross-sectional area of ​​the pressure seat 31 at its front end, so that the suction section 11 on the suction plate 13 is shielded by the pressure seat 31 in front of it. When in use, the air intake section 11 is not visible from the front, i.e., the light from the air intake section 11 does not project from the rear to the front, thereby reducing the impact on people's eyes caused by the rotation of the mixed flow fan 2. Because the rotating base 21 increases in the radial direction from the rear to the front, the first blade 22 is closer to the air intake plate 13 than the rotating base 21, thereby enhancing the collection ability of the mixed flow fan 2.

[0026] As shown in Figures 4 and 5, the front end of the pressure member 3 is recessed, and a front cover 33 is further provided at the front end of the pressure member 3. The recessed front cover 33 forms a negative pressure area 331, allowing local airflow to flow just past the front of the front cover 33 after being blown out from the air outlet 12, thereby replenishing the negative pressure area 331 and reducing turbulence. In another embodiment, the front cover 33 may be used to detachably mount an IP character object. The front cover 33 may be exposed or at least partially covered with a transparent material, thereby improving user interaction with the IP character object. Removable mounting eliminates the need to customize different molds for different partners, allowing one mold to accommodate multiple IP partners, reducing IP partner production costs by approximately 40%. Exposed IP character objects increase users' direct contact with the IP character object, transforming the traditional user experience. The front cover 33 may be used to install an aroma assembly, an assembly combining humidification and aroma, a USB cable, a mirror for an LED lamp, etc., but is not limited thereto.

[0027] As shown in Figures 3 to 5, the portable bladeless fan 100 further includes a booster 4 connected within the housing 1 and surrounding the combined fan 2. In addition to boosting pressure, the booster 4 also functions similarly to sound-proof glass, reducing noise. A first passage T1 is formed between the combined fan 2 and the booster 4, and a second passage T2 is formed between the pressurizing member 3 and the housing 1. The first passage T1 and the second passage T2 jointly form a pressurized air guide passage T, and air flows from the intake port 11 through the pressurized air guide passage T before being discharged from the outlet port 12. The front end of the booster 4 is connected to a portion of the pressurizing member 3 close to the second housing 1b, i.e., the booster 4 is attached facing forward to the rear side of the second blade 32, and the rear end of the booster 4 is connected to a portion of the first housing 1a close to the intake section 11, and a gap is formed between the booster 4 and the first housing 1a to absorb noise generated by the rotation of the mixed flow fan 2.

[0028] 3 to 5, the pressure intensifier 4 includes a pressure intensifier surface 41 that faces the mixed flow fan 2 and at least partially increases radially from rear to front. At least a portion of the air guide surface 211 and the pressurization surface 311 are radially recessed to form concave surfaces, and at least a portion of the pressure intensifier surface 41 is radially protruded to form a convex surface, thereby increasing the volume within the pressurized guide passage T and collecting air. By maintaining the minimum radial gap distance between the first blade 22 and the pressure intensifier surface 41 within the error range of the equivalent blocking distance, airflow generated at the front end of the mixed flow fan 2 is prevented from bypassing the minimum radial gap and returning to the rear end, thereby increasing air pressure and reducing noise caused by turbulent interference.

[0029] 3 to 5, the front end of the pressure intensifier 4 is flush with the front end of the mixed flow fan 2, or the front end of the pressure intensifier 4 protrudes forward of the front end of the mixed flow fan 2 to provide sufficient pressure intensification. The height of the front end of the pressure intensifier 4 is 1.4 to 3.7 mm, and the front end of the pressure intensifier 4 and the housing 1 are stepped, allowing the high-pressure air generated by the mixed flow fan 2 to flow quickly to the pressurizing member 3.

[0030] 3, 4, 6, and 7, a wire passing groove 321 is provided in one of the second blades 32. In this embodiment, the wire passing groove 321 is provided in the second blade 32 connected to the handle 5, and the wire passing groove 321 communicates with the first cavity 214. At least a portion of a main board 6 is provided in the handle 5. In this embodiment, a portion of the main board 6 is provided in the handle 5, and another portion of the main board 6 is provided in the housing 1. The main board 6 is located behind the wire passing groove 321, and the main board 6 and the wire passing groove 321 at least partially overlap in the front-to-rear direction. A conductor 7 is connected to the motor 23 and the main board 6. The conductor 7 passes from the motor 23 through the wire passing groove 321 and is connected to the main board 6. The main board 6 has a first surface 61 and a second surface 62 that are parallel to each other. The first surface 61 faces backward, and the second surface 62 faces forward. One end of the conductor 7 is connected to the motor 23, and the other end of the conductor 7 is connected to the main board 6 and located on the first surface 61. If the conductor 7 were attached to the second surface 62 of the main board 6, the worker would have to install the main board 6 into the housing 1 and the handle 5 while shielding the conductor 7. This would make it difficult for the worker to ensure that the conductor 7 is not pressed against the main board 6, making the conductor 7 prone to being crushed, making assembly difficult, and requiring backtracking. Therefore, attaching the conductor 7 to the first surface 61 of the main board 6 is advantageous for improving assembly quality and efficiency.

[0031] 3, 4, 6 and 7, a wire pressure plate 8 is further provided behind the wire passing groove 321, and the wire pressure plate 8 limits the movement of the conductor wire 7. Stopper blocks 322 extend rearward from both ends of the wire passing groove 321, and the stopper blocks 322 abut against the wire pressure plate 8 to limit the movement of the wire pressure plate 8 on the mounting plane. A buckle 81 extends toward the wire passing groove 321 at the end of the wire pressure plate 8 close to the motor 23, and the buckle 81 passes through the wire passing groove 321 and engages with the stopper block 322 to limit the rearward movement of the wire pressure plate 8. An insertion block 82 extends toward the wire passing groove 321 at the end of the wire pressure plate 8 away from the drive assembly, and the insertion block 82 is inserted into the wire passing groove 321 to limit the rearward movement of the wire pressure plate 8. The wire pressure plate 8 is further provided with a protrusion 83 facing the wire passing groove 321, which holds the conductor 7 and prevents the rear end of the conductor 7 from swinging within the wire passing groove 321 during use, thereby reducing noise generated by swinging friction between the conductor 7 and the wire passing groove 321.

[0032] 3, 4, 6 and 7, a light emitting element 63 is provided on the second surface 62, a hole 51 corresponding to the light emitting element 63 is provided on the handle 5, and a light guide rod 52 is provided on the side of the wire passage groove 321 away from the motor 23, with one end of the light guide rod 52 abutting against the second surface 62 and the other end connected to the inside of the handle 5, and light emitted by the light emitting element 63 travels along the light guide rod 52 and exits from the hole 51. There is a gap between the intensifier 4 and the light guide rod 52, and the wire 7 passes through the wire passage groove 321, passes through the gap between the intensifier 4 and the light guide rod 52, and then bypasses the outer wall of the intensifier 4 to be electrically connected to the first surface 61, so that the entire structure is more compact, small and delicate, and has a higher space utilization rate.

[0033] 8 to 13 are schematic diagrams of a second embodiment of the portable bladeless fan 100 of the present application. Compared to the portable bladeless fan 100 of the first embodiment, the portable bladeless fan 100 of the second embodiment is larger in volume and flatter. In this embodiment, the ratio of the length of the front and rear ends of the first housing 1a to the length of the front and rear ends of the second housing 1b is 1 to 1.5, achieving a slim profile while also achieving a reasonable balance between air volume and pressure. The radius of the maximum radial surface at the front end of the pressure member 3 is 28 to 35 mm. That is, the radius of the radial cross section of the pressure seat 31 at its front end is 28 to 35 mm, expanding the airflow area while ensuring sufficient air volume and pressure. The extension wall 213 does not protrude forward beyond the rotating seat 21, and is not inserted forward into the second cavity 313. The first cavity 214 and the second cavity 313 are adjacent to each other with a gap between them, but the first cavity 214 and the second cavity 313 do not overlap. The distance between the intake plate 13 and the rear end of the rotating seat 21 is 7.4 to 9.8 mm. The pressure-increasing surface 41 is a smooth surface, which allows air to flow more smoothly and smoothly to the pressure member 3.

[0034] As shown in FIG. 11 , in this embodiment, the main board 6 is completely installed within the handle 5 and is located below the cable passage groove 321. The main board 6 has the first surface 61 facing upward and the second surface 62 facing downward. The light emitting element 63 is installed on the first surface 61, and the opening 51 is installed on the second housing 1b and connected to the inside of the second housing 1b corresponding to the light guiding column 52. There is a gap between the booster 4 and the first surface 61, and the conductive wire 7 passes through the cable passage groove 321, passes through the gap between the booster 4 and the first surface 61, and is then electrically connected to the first surface 61. The components of the second embodiment are substantially the same as those of the first embodiment, and will not be further described here.

[0035] The above is merely a preferred embodiment of the present application and does not limit the scope of the claims of the present application. Any equivalent structure or equivalent flow conversion made using the contents of the specification and drawings of the present application, or any direct or indirect application to other related technical fields, is also included in the scope of the claims of the present application.

Claims

1. A portable fan including a housing, a mixed flow fan, a pressurizing member, and a pressure booster, an intake section is provided on the rear side of the housing, and an outlet section is provided on the front side of the housing, and the intake section and the outlet section are communicated within the housing; the mixed flow fan is provided in the housing and rotates around a rotation axis to generate an airflow; the pressure member is connected to a front portion of the housing and is located at the front side of the mixed flow fan, the pressure member and the housing are integrally molded or separately molded, the pressure member includes a pressure seat and a plurality of second blades, the pressure seat includes a pressure surface that increases at least partially in a radial direction from rear to front, the plurality of second blades are arranged at intervals on the pressure surface, and the plurality of second blades are connected to the housing, the pressure intensifier is connected to the housing and is provided so as to surround the mixed flow fan, the pressure intensifier is attached to the rear side of the second blade facing forward, and is used to amplify the airflow generated by the mixed flow fan and cause the amplified airflow to flow toward the pressurizing member; Here, a front cover is further provided at the front end of the pressure member, and the front cover is gradually recessed toward the intake section in the direction from the peripheral area of ​​the front cover to the central area of ​​the front cover, so that a negative pressure area is formed in the central area of ​​the front cover, whereby the local airflow flows in close contact with the front surface of the front cover after being blown out from the outlet section, replenishing the airflow to the negative pressure area.

2. The mixed flow fan includes a rotating base and a plurality of first blades; The rotating seat includes an air guide surface that increases in a radial direction from rear to front, and the first blades are arranged on the air guide surface at intervals; 2. The portable fan of claim 1, wherein the air guide surface and the pressure surface form a trumpet-like shape that increases radially, thereby forming an outwardly expanding pressure slope, which increases the pressure stroke of the airflow, and which, in conjunction with the housing, converts sharp noise into a mellow sound.

3. The rotation seat and the pressure seat are disposed adjacent to each other in the axial direction at an interval, The air guide surface and the pressure surface are disposed adjacent to each other in the axial direction with a gap therebetween, The portable fan of claim 2, wherein the axial distance between the rotating seat and the pressure seat and the axial distance between the air guide surface and the pressure surface are both 1 to 4 mm, so that the wind generated by the mixed flow fan flows smoothly to the pressure surface, reducing noise caused by turbulence.

4. The rotating seat is provided with a first cavity that opens forward, The pressure seat is provided with a second cavity that opens rearward, the first cavity and the second cavity at least partially overlap in a radial direction; 3. The portable fan of claim 2, wherein the mixed-flow fan includes a motor, the motor is housed in the first cavity and the second cavity, and the opening of the first cavity and the opening of the second cavity are shielded from each other, thereby achieving a shielding process for noise from the motor and converting sharp noise into a mellow sound.

5. The radius of the radial cross section of the pressure seat at its front end is 21.3 to 22 mm; or The radius of the radial cross section at the front end of the pressure seat is 28 to 35 mm, and the air blowing area is expanded under the condition that sufficient air volume and air pressure are ensured. The portable fan according to claim 1, wherein the thickness of the pressure seat in the front-to-rear direction is 9.5 to 14.5 mm.

6. The portable fan according to claim 1 , wherein the front end of the pressure member is recessed backward.

7. Here, one end of the booster is installed on the side of the pressurizing member facing the intake section, and the booster extends in a direction away from the pressurizing member.

2. The portable fan of claim 1, wherein a first passage is formed between the mixed flow fan and the booster, a second passage is formed between the pressurizing member and the housing, the first passage and the second passage jointly form a pressurized air guide passage, and wind passes through the first passage from the intake section, exits the booster, enters the second passage, and further flows to the blowing section.

8. The housing includes a first housing and a second housing that fit together from front to back, the first housing extends radially rearward from the radially outer side of the intake section, increasing radially, and then extends radially forward in the opposite direction, increasing radially; the second housing extends radially from rear to front while decreasing in diameter; a front end of the pressure intensifier is connected to a portion of the pressurizing member close to the second housing, and a rear end of the pressure intensifier is connected to a portion of the first housing close to the intake portion; A gap is formed between the booster and the first housing to absorb noise generated by the rotation of the mixed flow fan, and / or 8. The portable fan of claim 7, wherein the booster is fixedly connected to the housing and spaced apart from the mixed flow fan.

9. The mixed flow fan includes a rotating base, the rotating base including an air guide surface that increases at least partially in a radial direction from rear to front, and a plurality of first blades connected to the air guide surface and arranged at intervals; 8. The portable fan of claim 7, wherein the pressure intensifier includes a pressure intensifier surface facing the mixed flow fan and increasing at least partially radially from back to front.

10. 10. The portable fan of claim 9, wherein at least a portion of the air guide surface and the pressurizing surface are radially recessed to form concave surfaces, and at least a portion of the pressure-increasing surface is radially protruded to form a convex surface, thereby increasing the volume within the pressurized air guide passage and collecting wind.

11. 10. The portable fan of claim 9, wherein the minimum radial gap distance between the first blade and the pressure-increasing surface is maintained within an error range of the equivalent blocking distance, thereby preventing the airflow generated at the front end of the mixed-flow fan from bypassing the minimum radial gap and returning to the rear end, thereby increasing air pressure and reducing noise caused by turbulent interference.

12. The front end of the booster is flush with the front end of the mixed flow fan; or The portable fan according to claim 7, wherein a front end of the booster protrudes forward from a front end of the mixed flow fan to sufficiently boost the pressure.

13. 8. The portable fan of claim 7, wherein the wall thickness of the front end of the booster in a direction perpendicular to the axis thereof is 1.4 to 3.7 mm, and the front end of the booster and the housing are stepped, so that the high-pressure wind generated by the mixed flow fan can flow quickly to the pressurizing member.

14. A portable electric fan, a housing having an intake section at its rear side and an outlet section at its front side, the intake section and the outlet section communicating with each other within the housing, and a handle formed on the lower side of the housing; a pressure member including a pressure seat and a plurality of second vanes arranged at intervals on the radially outer side of the pressure seat, wherein the pressure seat is provided with a first cavity that opens rearward, the plurality of second vanes are connected to a front portion of the housing, and one of the second vanes is provided with a wire passing groove that communicates with the first cavity; a mixed flow fan provided within the housing and connected to the rear side of the pressurizing member, rotating around a rotation axis to generate an airflow, the mixed flow fan including a motor, a rotating base, and a plurality of first blades, the plurality of first blades being arranged at intervals on the radially outer side of the rotating base, the motor driving the rotating base and the plurality of first blades to rotate, the rotating base being provided with a second cavity that opens forward, the motor being accommodated in the first cavity and the second cavity; a main board at least partially disposed within the handle, wherein electrical wires are connected to the motor and the main board, and the electrical wires pass from the motor through the wire passage groove and are connected to the main board; Here, a front cover is further provided at the front end of the pressure member, and the front cover is gradually recessed toward the intake section in the direction from the peripheral area of ​​the front cover to the central area of ​​the front cover, so that a negative pressure area is formed in the central area of ​​the front cover, whereby the local airflow flows in close contact with the front surface of the front cover after being blown out from the outlet section, replenishing the airflow to the negative pressure area.

15. 15. The portable fan of claim 14, wherein the main board has a first surface and a second surface that are parallel to each other, the first surface facing rearward, and the second surface facing forward, one end of the conductor being connected to the motor, and the other end of the conductor being connected to the main board and located on the first surface.

16. A portable fan as described in claim 15, further comprising a wire clamping plate provided on the rear side of the wire passage groove, the wire clamping plate restricting movement of the conductor, and stopper blocks extending rearward at both ends of the wire passage groove, the stopper blocks abutting against the wire clamping plate to restrict movement of the wire clamping plate on the mounting plane.

17. a buckle extending toward the wire passage groove at an end of the wire pressure plate close to the motor, the buckle passing through the wire passage groove and engaging with the stopper block to limit rearward movement of the wire pressure plate; 17. The portable fan according to claim 16, wherein an insertion block is provided at an end of the wire pressure plate away from the drive assembly, the insertion block extending toward the wire passage groove, and the insertion block is inserted into the wire passage groove.

18. a light emitting member is provided on the second surface; The handle has an opening corresponding to the light emitting member; 16. The portable fan of claim 15, wherein a light guide rod is provided on the side of the wire passage groove away from the motor, one end of the light guide rod abuts against the second surface, and the other end of the light guide rod is connected to the inside of the handle, and light emitted by the light-emitting element is emitted from the opening along the light guide rod.

19. a pressure intensifier located within the housing and surrounding the mixed flow fan, the pressure intensifier being attached to a rear side of the second blade facing forward; 19. The portable fan of claim 18, wherein there is a gap between the booster and the light guide rod, and the conducting wire passes through the wire passing groove, passes through the gap between the booster and the light guide rod, and then bypasses the outer wall of the booster to be electrically connected to the first surface.

20. The portable fan of claim 14, wherein the portable fan is a handheld bladeless fan equipped with a handle, a clamp fan equipped with a clamp, a flexible fan equipped with a bending-shaping member for winding, a desk fan equipped with a stand, or a floor-standing fan equipped with an extendable stand.

21. A portable electric fan, a housing having an intake section at its rear side and an outlet section at its front side, the intake section and the outlet section communicating with each other within the housing; a mixed flow fan provided in the housing and rotating around a rotation axis to generate an airflow; a pressure member connected to a front portion of the housing and located at the front of the mixed flow fan, the pressure member including a pressure seat and a plurality of second blades, the pressure seat including a pressure surface that increases at least partially in a radial direction from rear to front, the plurality of second blades being disposed on the pressure surface at intervals, the plurality of second blades being connected to the housing, the airflow generated by the mixed flow fan flowing to the pressure surface to form high-pressure air, and the plurality of second blades arranging the airflow, realizing noise reduction and converting sharp sounds into muffled sounds; The mixed flow fan includes a rotating seat and a motor, the rotating seat having a first cavity that opens forward, and the pressure seat having a second cavity that opens backward, the first cavity and the second cavity at least partially overlapping in a radial direction, the motor is housed in the first cavity and the second cavity, and the opening of the first cavity and the opening of the second cavity are shielded from each other, thereby achieving a shielding process for the noise of the motor and converting sharp noise into a mellow sound, Here, a front cover is further provided at the front end of the pressure member, and the front cover is gradually recessed toward the intake section in the direction from the peripheral area of ​​the front cover to the central area of ​​the front cover, so that a negative pressure area is formed in the central area of ​​the front cover, whereby the local airflow flows in close contact with the front surface of the front cover after being blown out from the outlet section, replenishing the airflow to the negative pressure area.

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