Pressurized mixed flow generator and portable bladeless fan equipped with the same

Abstract

The present invention provides a pressurized mixed flow generator for a portable bladeless fan, comprising: a shell, a rear side of which is provided with an air inlet, a front side of which is provided with an air outlet, the air inlet and the air outlet being connected inside the shell; a pressurizing member connected to the front side of the shell; a mixed flow fan located inside the shell and connected to the rear side of the pressurizing member, the mixed flow fan rotating around a rotating shaft to generate airflow; wherein a pressurized flow guide channel is formed between the pressurizing member and the mixed flow fan and the shell, the radial cross-sectional area of ​​the pressurized flow guide channel at the air inlet end is larger than the radial cross-sectional area at the air outlet end, air enters the pressurized flow guide channel from the air inlet, forms a pressurized mixed flow in the pressurized flow guide channel, and is discharged from the air outlet.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a pressurized mixed flow generator with large air volume and pressure and a portable bladeless fan equipped with the same. Background Art

[0002] Axial fans are common in daily life. The characteristic of axial fans is that the path of wind from air inlet to air outlet does not deviate radially, which is basically equivalent to straight in and straight out. The wind enters the axial fan axially from the air inlet end and then leaves axially from the air outlet end. This method has low wind resistance, so the air volume loss is small. In other words, by default, technical personnel in this field will use axial flow blades to manufacture axial flow fans if they want to ensure low air volume loss. Over time, this has formed a consensus, and then formed a technical prejudice that is difficult to change; because of this, technical personnel in this field have not proposed ideas to solve this technical problem. By default, using axial flow fans will not go wrong, and it requires less investment in research and development, low cost, and the fan products can be quickly sold to make profits in the capital market.

[0003] However, unlike other companies in the same field who pursue low R&D costs and quickly produce products to seize the market and make profits, the inventors of this application have consistently delved into the field of fan technology, conducted in-depth investigations and understanding of fluid theory, fan product market, and user pain points and user needs. After studying the industry, they found that, taking handheld fans or ordinary desktop fans as examples, although the existing axial flow fans have low wind resistance and small air volume loss, they have not taken into account other technical problems, that is, the wind pressure of axial flow fans is low and the air supply distance is short. In other words, although there is no air volume loss, there are no increments to supplement, and the air supply distance is difficult to guarantee, so the general use distance of ordinary portable fans is about 1-1.5 meters. If you are a little further away, you will not be able to experience the refreshing feeling of blowing and cooling off. At the same time, because the fan blades of axial flow fans are visible, it is easy for infants and young children to cut their fingers when using them, or if foreign objects such as toys and chopsticks are inserted into the fan blades, they are easy to break or even fragments fly and cut the human body. The existing axial flow fans are completely unable to meet the user's safety needs.

[0004] Moreover, the inventor of this application has found that some portable fans use centrifugal fan blades to overcome the difficulty of low wind pressure. However, after the wind enters the centrifugal fan axially from the air inlet end, it leaves radially from the air outlet end. The wind direction changes greatly, the air volume loss is very serious, and the air outlet effect is difficult to meet user requirements.

[0005] In addition, although it is well known in the industry that Dyson has launched a bladeless fan, in order to achieve the desired air volume, it uses an ultra-high-speed fan, so its size is generally 30*30*150CM. 3(cubic centimeters), it occupies a very large area, is inconvenient to use and even inconvenient to carry. In addition, Dyson's fan products are generally priced at around RMB 3,000-8,000, which is very expensive for ordinary families or individuals, and can even be said to be luxury goods, so it has no use value for ordinary users.

[0006] In recent years, products and patents imitating Dyson's bladeless fans have appeared, and some are used in portable scenarios such as handheld. However, since the products cannot be made thin and light, or because of the excessive pursuit of thinness and lightness at the expense of air volume and wind force, they cannot meet the needs of users. In particular, if the product uses a diagonal flow fan, the motor and wind noise will form a sharp and harsh noise, which is unacceptable to users, so it is impossible to form a fan product with excellent performance.

[0007] Due to the existence of the above-mentioned technical problems and technical prejudices, the existing portable fans can no longer meet the users' usage needs. At the same time, with the improvement of living standards and the enrichment of fan application scenarios, people's requirements for portable fans that can be carried around are also getting higher and higher. After in-depth research on the above-mentioned technical problems, technical prejudices, user needs, usage safety issues and market products, the inventor of this application, after several years of research and experiments, proposed a portable bladeless fan, in order to design a structure with large air volume, high wind pressure and low noise on a small portable fan, so as to solve the above-mentioned many problems in this technical field. Summary of the invention

[0008] In view of this, the present invention provides a pressurized mixed flow generator that uses a pressurized component and a mixed flow fan, wherein a pressurized flow guide channel is formed between the pressurized component and the mixed flow fan and a housing, and the radial cross-sectional area of ​​the pressurized flow guide channel at the air inlet end is larger than the radial cross-sectional area at the air outlet end, so that air is discharged after forming a pressurized mixed flow through the pressurized flow guide channel. At the same time, the pressurized component is provided with a cavity for accommodating functional components at the air outlet end, and the pressurized component has a larger radial cross-sectional area at the air outlet end, so as to facilitate the reuse of the pressurizing function and the accommodating function of the pressurized component.

[0009] The present invention provides a pressurized mixed flow generator for a portable bladeless fan, comprising: a shell, an air inlet portion is provided on the rear side, and an air outlet portion is provided on the front side, the air inlet portion and the air outlet portion are connected in the shell; a pressurizing member is connected to the front side of the shell; a mixed flow fan is located in the shell and connected to the rear side of the pressurizing member, and the mixed flow fan rotates around a rotating shaft to generate airflow; wherein a pressurized flow guide channel is formed between the pressurizing member and the mixed flow fan and the shell, and the radial cross-sectional area of ​​the pressurized flow guide channel at the air inlet end is larger than the radial cross-sectional area at the air outlet end. area, air enters the pressurized guide channel from the air inlet, forms a pressurized mixed flow in the pressurized guide channel and is discharged from the air outlet; the pressurized component is provided with a cavity for accommodating functional components at the air outlet end, the difference between the depth value of the cavity and the length value of the pressurized component from the air inlet end to the air outlet end is less than a first difference value, and the difference between the radius value of the maximum opening of the cavity and the radius value of the maximum diameter surface of the pressurized component at the air outlet end is less than a second difference value, so as to realize the reuse of the pressurization function and the accommodation function of the pressurized component.

[0010] Furthermore, the mixed flow fan includes a rotating seat, and the pressure member includes a pressure seat. At least a portion of the pressure seat radially increases from the air inlet end to the air outlet end. The rotating seat and the pressure seat are arranged closely spaced in the axial direction. The axial distance between the rotating seat and the pressure seat is 1-1.5mm, so that the wind formed by the mixed flow fan can flow smoothly to the pressure seat.

[0011] Furthermore, the axial length of the front and rear ends of the rotating seat is 1-1.5 times the axial length of the front and rear ends of the pressurizing seat. From the air inlet end to the air outlet end, the rotating seat and the pressurizing seat as a whole radially increase in a trumpet shape to form an outward-expanding pressurizing slope, so that when the thickness of the rotating seat and the pressurizing seat is limited, the pressurizing stroke of the airflow on the rotating seat and the pressurizing seat is increased by the outward-expanding pressurizing slope, and the difference between the radius value of the bottom surface of the cavity adjacent to the rotating seat and the radius value of the radial cross-section of the shell at the air outlet end is less than a third difference value, so that when the depth value of the cavity is limited, the radial cross-sectional area of ​​the bottom surface of the cavity adjacent to the rotating seat is increased to increase the accommodating space of the cavity for accommodating the functional components.

[0012] Furthermore, the first difference value and the second difference value are both 1.3-1.7mm, and the third difference value is 6.2-6.8mm, so as to ensure that the cavity has sufficient space to accommodate the functional components in the radial direction, and at the same time ensure that the airflow is pressurized and discharged from the gap formed between the pressurizing slope and the shell at the air outlet end; wherein the radius value of the maximum diameter surface of the pressurizing part at the air outlet end is 28-35mm, which expands the blowing area while ensuring sufficient air volume and air pressure.

[0013] Furthermore, the functional component is detachably fixed to the cavity, the radial cross-section of the cavity is circular, the cavity includes a bottom surface located at the rear and a peripheral wall connected to the bottom surface and located in the radial direction, at least a portion of the peripheral wall radially increases from the bottom surface to the front to facilitate the fixing and removal of the functional component.

[0014] Furthermore, an air outlet is provided on the bottom surface, and when the functional component is fixed to the cavity, wind from the air outlet escapes forward through the surface of the functional component.

[0015] Furthermore, the functional component is used for a detachable IP image item, and the cavity can be exposed or covered by an at least partially transparent front cover to enhance user interaction with the IP image item; or, the functional component is used to store a USB harness; or, the functional component is used for humidification spray, and the functional component includes a main body and a front cover arranged on the front side of the main body, the main body includes a water storage component and an atomizing component, the water storage component is provided with a water filling port and a mist outlet, the water filling port is used for adding water, the mist outlet is located on the front side of the water storage component, the atomizing component is correspondingly arranged in front of the mist outlet and is sealed with the mist outlet, the atomizing component is used to atomize and spray the water in the water storage component, and the front cover is provided with a mist outlet, and the mist outlet reveals at least a portion of the atomizing component.

[0016] Furthermore, a first contact is provided on the wall surface of the cavity, and a second contact connected to the atomizer is correspondingly provided on the functional component. When the functional component is accommodated in the cavity, the second contact is electrically connected to the first contact to supply power to the atomizer.

[0017] Furthermore, the mist outlet includes a through hole, a first matching portion located in the circumference of the through hole, and a fixing portion located in the through hole, the first matching portion forms a recess from front to back and makes the through hole have a depth in the axial direction, the atomizer includes an atomizer sheet and a second matching portion arranged in the circumference of the atomizer sheet, the second matching portion cooperates with the first matching portion to fix the atomizer sheet in front of the through hole.

[0018] Furthermore, the main body also includes a water absorbing member arranged in the water storage member, the water absorbing member extends upward from at least the bottom of the water storage member to the middle of the water storage member, at least a portion of the water absorbing member is located in the through hole, and is clamped between the retaining portion and the atomizing sheet; the front end of the main body is flush with the front end of the shell, or the front end of the main body is recessed backward relative to the front end of the shell, so that the water storage member is not easily scratched or collided.

[0019] Furthermore, the mixed flow fan uses an outer rotor brushless motor.

[0020] The present invention also provides a portable bladeless fan, wherein the portable bladeless fan is provided with the pressurized mixed flow generator.

[0021] Furthermore, the portable bladeless fan is a handheld bladeless fan equipped with a handle, or a clamping fan equipped with a clip, or a changeable fan equipped with a curved shaping piece for winding, or a desktop fan equipped with a bracket, or a floor fan equipped with a telescopic bracket.

[0022] Compared with the prior art, the pressurized mixed flow generator of the present invention and the portable bladeless fan equipped with the same have the following beneficial effects: after the wind enters the mixed flow fan axially from the air inlet end, it leaves obliquely from the air outlet end, combining the advantages of the large air volume of the axial flow fan and the high air pressure of the centrifugal fan. At the same time, a pressurized flow guide channel is formed between the mixed flow fan and the pressurized component and the shell, and the radial cross-sectional area of ​​the pressurized flow guide channel at the air inlet end is large, which is conducive to absorbing air and increasing the air volume; the radial cross-sectional area of ​​the pressurized flow guide channel at the air outlet end is small, which is conducive to compressing air and increasing wind pressure. The oblique air outlet feature of the mixed flow fan further increases the wind pressure and increases the air supply distance, thereby achieving large air volume and high wind pressure on a portable bladeless fan with a smaller volume, thereby improving the user experience.

[0023] In addition, the pressure member is provided with a cavity for accommodating functional components at the air outlet end, the difference between the depth value of the cavity and the length value of the pressure member from the air inlet end to the air outlet end is less than a first difference value, and the difference between the radius value of the maximum opening of the cavity and the radius value of the maximum diameter surface of the pressure member at the air outlet end is less than a second difference value, so as to realize the reuse of the pressure member in the pressurizing function and the accommodating function.

[0024] At the same time, existing handheld humidifying fans usually have a protruding water tank on the front side of the shell. Under the condition that the air output is not affected, the water capacity of the water tank is far from meeting the needs of frequent atomization humidification, and the outwardly protruding water tank is not only unsightly, but also inconvenient to place and carry. In this application, by setting the first difference value, the second difference value and the third difference value, the water capacity of the water storage part is 3 times the water capacity of the existing handheld humidifying fans on the market, which can extend the use time by more than 3 times; and the front end of the body is flush with the front end of the shell, or the front end of the body is recessed backward relative to the shell, which is more portable and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional diagram of a portable bladeless fan of the present invention;

[0026] Figure 2 It is a three-dimensional exploded view of a portable bladeless fan of the present invention at one angle;

[0027] Figure 3 It is a three-dimensional exploded view of the portable bladeless fan of the present invention from another angle;

[0028] Figure 4 is a cross-sectional view from left to right of the portable bladeless fan of the present invention;

[0029] Figure 5 yes Figure 4 Schematic diagram of the middle wind guide surface;

[0030] Figure 6 It is a schematic diagram of a rotating seat and a pressurizing seat of another embodiment of the portable bladeless fan of the present invention;

[0031] Figure 7 It is a left view of the portable bladeless fan of the present invention when the housing is transparently displayed;

[0032] Figure 8 is a cross-sectional view from front to back of the portable bladeless fan of the present invention;

[0033] Fig. 9 It is a rear view of the portable bladeless fan of the present invention when the cover plate is hidden and the housing is displayed transparently;

[0034] Fig.10 It is a three-dimensional exploded view of the functional components in the portable bladeless fan of the present invention. DETAILED DESCRIPTION

[0035] In order to facilitate a better understanding of the purpose, structure, characteristics and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0036] In order to facilitate understanding of the technical solution of the present invention, the X-axis direction of the three-dimensional coordinate axes in the drawings of the specification is defined as the left-right direction, the Y-axis is defined as the front-back direction, and the Z-axis is defined as the up-down direction. Air, wind and airflow in this application all refer to gas.

[0037] refer to Figures 1 to 3 , Figure 1 is a three-dimensional diagram of a portable bladeless fan A of the present invention, Figure 2 and Figure 3 The figures are exploded views of the portable bladeless fan A of the present invention at two different angles. The portable bladeless fan A of the present invention comprises a pressurized mixed flow generator 100 and a portable carrying part 200 .

[0038] refer to Figure 1 In the present embodiment, the portable bladeless fan A is a handheld bladeless fan, and the portable carrying part 200 is disposed below the pressurized mixed flow generator 100, and the portable carrying part 200 is a handle for the user to hold. Of course, the portable bladeless fan A may also be a clamping fan equipped with a clip, or a versatile fan equipped with a curved shaping piece for winding, or a desktop fan equipped with a bracket, or a floor fan equipped with a telescopic bracket, without limitation. The portable carrying part 200 is provided with a semiconductor refrigeration component 201, and the user can carry the portable bladeless fan A with the portable carrying part 200. At the same time, the semiconductor refrigeration component 201 can automatically adjust the cooling temperature according to the temperature of the part that the user contacts with the portable carrying part 200, thereby improving the user's carrying comfort. It should be understood that the portable bladeless fan A is used for dissipating heat and cooling down, and a semiconductor refrigeration component 201 is provided on the corresponding portable carrying part 200 to enhance the user's carrying comfort; of course, adding a heating element (not shown) to the portable bladeless fan A can also be used for heat preservation and heating, and a warming component (not shown) can be provided on the corresponding portable carrying part 200 to automatically adjust the temperature of the part in contact with the human body to warm the part in contact with the human body and enhance the user's carrying comfort.

[0039] Combination Figure 2 and Figure 3In this embodiment, the portable carrying part 200 can accommodate a battery (not marked, the same below), and the portable carrying part 200 can be exposed to set a switch button (not marked, the same below) and a charging port (not shown, the same below). The battery is used to power the portable bladeless fan A, the switch button is used to adjust the wind speed and switch, and the charging port is used to charge the battery with an external power supply. When the portable bladeless fan A is a fan of other forms (such as the above-mentioned clamping fan, versatile fan, desktop fan, etc.), the positions of the battery, switch button and charging port can be adjusted accordingly. Of course, in order to pursue a thinner and lighter appearance, the portable bladeless fan A may not be provided with the battery, and it can also be portable by setting an interface (not shown) to connect to an external mobile power source.

[0040] refer to Figures 1 to 3 , the pressurized mixed flow generator 100 includes a shell 1, a pressure member 3 and a mixed flow fan 2. The radial cross-sections of the shell 1, the pressure member 3 and the mixed flow fan 2 are generally circular. Of course, the shell 1, the pressure member 3 and the mixed flow fan 2 can also be other shapes, which is not limited to this. The pressure member 3 is connected to the front side of the shell 1, and the pressure member 3 and the shell 1 are integrally formed, which is of course not limited to this. The mixed flow fan 2 is connected to the rear side of the pressure member 3 and is located in the shell 1. The mixed flow fan 2 rotates around the rotating shaft 24 to generate airflow. The air inlet end R of the portable bladeless fan A is located at the rear end, and the air outlet end F is located at the front end. The extension direction perpendicular to the rotating shaft 24 and passing through the rotating shaft 24 is the radial direction, and the direction parallel to the rotating shaft 24 is the axial direction.

[0041] refer to Figure 2 , Figure 3 , Figure 4 and Figure 7, the diameter of the maximum radial cross-section of the shell 1 is 2-2.2 times the length of the front and rear ends of the shell 1, so that the pressurized mixed flow generator 100 is light and thin, and compared with the extremely small air outlet surface of the existing handheld fans on the market, the portable bladeless fan A of the present application has a larger air outlet area while ensuring the air volume and air pressure. When the user uses it (such as holding it or standing on a plane), at the same distance, the wind blown out by the portable bladeless fan A of the present application can contact more parts of the user, and the blowing effect is better. The rear side of the shell 1 is provided with an air intake plate 13, and the air intake plate 13 is provided with an air intake portion 14. The front side of the shell 1 is connected to the pressure member 3, and the pressure member 3 and the shell 1 form an air outlet portion 15 between the radial direction close to the air outlet end F, and the air intake portion 14 and the air outlet portion 15 are connected in the shell 1. A cover plate 16 is fixed to the rear side of the air inlet plate 13. The cover plate 16 is provided with an air hole 161. The size of the air hole 161 is smaller than the size of the air inlet portion 14, so as to prevent fingers or other foreign objects from entering the housing 1 from the air inlet portion 14, thereby improving the safety of use. There is a distance between the cover plate 16 and the air inlet plate 13, and at least a portion of the air inlet plate 13 is recessed forward, and at least a portion of the cover plate 16 is recessed backward, so as to increase the radial air inlet path between the air inlet plate 13 and the cover plate 16 when the size of the air hole 161 on the cover plate 16 is small. At the same time, the size of the air inlet portion 14 is large, so the air volume will not be affected by the cover plate 16 provided with the air hole 161 of small size. The housing 1 is further divided into a first housing 11 and a second housing 12 that match each other in front and back. The first housing 11 and the second housing 12 are fixed to each other through a fixing structure. The mixed flow fan 2 is basically arranged in the first housing 11 in a radial direction, and the pressure member 3 is basically arranged in the second housing 12 in a radial direction. The ratio of the length of the front and rear ends of the first housing 11 to the length of the front and rear ends of the second housing 12 is 1-1.5, which can reasonably balance the relationship between air volume and air pressure while achieving lightness and thinness.

[0042] refer to Figure 2 , Figure 4 , Figure 8 and Fig. 9The mixed flow fan 2 includes a rotating seat 21 and a plurality of first blades 22. The rotating seat 21 includes an air guide surface 211 that radially increases from the air inlet end R to the air outlet end F. A plurality of first blades 22 are connected and equidistantly arranged on the air guide surface 211. Each of the blades includes a first blade root 221 connected to the air guide surface 211, and a first blade top 222 away from the air guide surface 211. The first blades 22 extend spirally at a predetermined angle from the air inlet end R to the air outlet end F and along the circumference of the air guide surface 211. When viewed from the air inlet end R to the air outlet end F, any two adjacent first blades 22 have a first interval J1 at the air inlet end R and a second interval J2 at the air outlet end F. The ratio of the first interval J1 to the second interval J2 is in the range of 0.5-0.9, which is conducive to increasing the air intake. Combined with reference Figure 3 The rotating seat 21 is roughly truncated cone-shaped. The radial cross-sectional area of ​​the rotating seat 21 at the air inlet end R is smaller than the radial cross-sectional area of ​​the rotating seat 21 at the air outlet end F. The rotating seat 21 has a relatively large radial cross-sectional area at the air outlet end F. The rotating seat 21 is recessed at the air outlet end F toward the air inlet end R to form a receiving portion 23. The receiving portion 23 is used to accommodate components such as motors. The motor used by the mixed flow fan 2 is an outer rotor brushless motor 25, which has a service life of up to 15,000 hours, and there is no electric spark generated when the brush motor is running, which can greatly reduce the interference of electric sparks on remote control radio equipment; when the brushless mode is running, the friction force is greatly reduced, the operation is smooth, and the noise reduction effect is good. In addition, the connection structure of the mixed flow fan 2 and the pressure member 3 is also accommodated in the receiving portion 23, which makes excellent use of space. The rotating shaft 24 protrudes forward from the rear wall of the receiving portion 23, and the rear side of the pressure member 3 protrudes backward to form a convex column 33, and the rotating shaft 24 is fixed to the convex column 33. At the same time, the outer rotor brushless motor 25 is accommodated in the accommodation portion 23 of the rotating seat 21, so that the rotating seat 21 and the pressure member 3 are independently isolated from each other.

[0043] refer to Figure 2 , Figure 4 and Figure 7 , there is a safe pressure distance D1 between the air intake plate 13 and the rear end of the rotating seat 21, so as to allow the air intake plate 13 to be deformed under maximum pressure within the pressure range allowed by the material properties. The distance between the air intake plate 13 and the rear end of the rotating seat 21 is 4.0-4.5mm (millimeter, the same below), so that there is space at the air intake end R for large air volume to enter, and at the same time there is space for the air intake plate 13 to be deformed under maximum pressure when it is subjected to large air volume. Combined with reference Fig. 9, the radial cross-sectional area of ​​the air intake plate 13 is greater than or equal to the maximum radial cross-sectional area of ​​the rotating seat 21, so as to ensure sufficient air intake and achieve noise reduction, so as to convert sharp noise into low sound; and the radial cross-sectional area of ​​the air intake plate 13 is less than or equal to the area of ​​the air intake window 2221 formed by the first blade top 222 at the air intake end R, so that the first blade top 222 begins to form a large wind pressure at the air intake window 2221 formed at the air intake end R. In this embodiment, the radial cross-sectional radius of the air intake plate 13 is 27.7 mm, and the radial cross-sectional radius of the rear end of the rotating seat 21 is 15.5 mm, which is of course not limited to this. In addition, the radial cross-sectional area of ​​the air intake plate 13 is less than or equal to the radial cross-sectional area of ​​the pressure seat 31 at the air outlet end F, and the air intake portion 14 on the air intake plate 13 is blocked by the pressure seat 31 at the front side. When in use, the air intake portion 14 cannot be seen from the front to the back, that is, the light of the air intake portion 14 will not be projected from the back to the front, so as to reduce the impact of the rotation of the mixed flow fan 2 on the human eye. At the air inlet end R, the first blade top 222 is closer to the air intake plate 13 than the first blade root 221, so as to enhance the suction capacity of the mixed flow fan 2.

[0044] refer to Figure 4 and Figure 5 , at least a portion of the wind guide surface 211 is recessed toward the rotating shaft 24. Specifically, the wind guide surface 211 includes an inlet surface 2111, an outlet surface 2113, and a transition surface 2112 extending between the inlet surface 2111 and the outlet surface 2113. In this embodiment, the inlet surface 2111 is oriented to form an inclined angle with the rotating shaft 24 to define an inclined flow path from the air inlet end R to the transition surface 2112, and the outlet surface 2113 is oriented to be substantially parallel to the rotating shaft 24 to define an axial flow path from the transition surface 2112 to the air outlet end F.

[0045] refer to Figure 6The inlet surface 2111 may be oriented to form an inclined angle with the rotating shaft 24 to define an inclined flow path from the air inlet end R to the transition surface 2112, and the outlet surface 2113 may be oriented to form an inclined angle with the rotating shaft 24 to define an inclined flow path from the transition surface 2112 to the air outlet end F. Of course, in other embodiments, the inlet surface 2111 may be oriented substantially parallel to the rotating shaft 24 to define an axial flow path from the air inlet end R to the transition surface 2112, and the outlet surface 2113 may be oriented substantially parallel to the rotating shaft 24 to define an inclined flow path from the transition surface 2112 to the air outlet end F; or the inlet surface 2111 may be oriented substantially parallel to the rotating shaft 24 to define an axial flow path from the air inlet end R to the transition surface 2112, the transition surface 2112 may form an inclined angle with the rotating shaft 24 to define an inclined flow path on the transition surface 2112, and the outlet surface 2113 may be oriented substantially parallel to the rotating shaft 24 to define an axial flow path from the transition surface 2112 to the air outlet end F.

[0046] At least one of the inlet surface 2111, the transition surface 2112 and the outlet surface 2113 is oriented to form an inclined angle with the rotating shaft 24 to limit at least a partially inclined flow path, so that the axial wind coming in from the air inlet end R close to the rotating shaft 24 is changed into axial wind or inclined wind relatively away from the rotating shaft 24 through the inclined flow path, which is beneficial to reducing air volume loss, increasing wind pressure, and increasing air supply distance.

[0047] It should be understood that at least a portion of the wind guide surface 211 may be recessed toward the rotating shaft 24, so that the mixed flow fan 2 gathers and expands the air volume and forms a high wind pressure, and the noise and wind noise of the outer rotor brushless motor 25 are closed to convert the sharp noise into a low sound. Of course, the wind guide surface 211 may also be an inclined plane, or may at least partially protrude away from the rotating shaft 24, and the present invention is not limited thereto.

[0048] refer to Figure 2 , Figure 4 , Figure 6 and Figure 7The pressurizing member 3 includes a pressurizing seat 31 and a plurality of second blades 32. The pressurizing seat 31 includes a pressurizing surface 311 that radially increases from the air inlet end R to the air outlet end F. A plurality of second blades 32 are connected and equidistantly arranged on the pressurizing surface 311. Each second blade 32 includes a second blade root 321 connected to the pressurizing surface 311 and a second blade top 322 away from the pressurizing surface 311. The second blade 32 includes a guide curved surface 323, and the guide curved surface 323 is close to the first blade 22. When viewed from the back to the front, the second blade 32 extends forward in a counterclockwise direction. The oblique flow wind formed by the mixed flow fan 2 passes through the guide curved surface 323 to form a direct current wind that is blown out in parallel with the rotating shaft 24, so as to increase the blowing distance and quickly pressurize the wind formed by the mixed flow fan 2. The second blade top 322 is connected to the housing 1, the rotating seat 21 is connected to the pressurizing seat 31 through a fixed matching structure, and the mixed flow fan 2 is relatively fixed in the housing 1 through the pressurizing member 3. The radius of the pressurizing member 3 at the maximum diameter surface of the air outlet F is 28-35 mm, which expands the blowing area while ensuring sufficient air volume and air pressure.

[0049] At the same time, the second blade 32 combs and transforms the passing wind, reduces turbulence, noise and vibration, reduces the noise emitted by turbulent crosstalk, achieves noise reduction, and converts sharp noise into low sound; and greatly improves the static pressure, reduces energy consumption, and strengthens the concentration of the mixed flow fan 2. The second blade 32 forms a wind flow uniformity for the mixed flow fan 2 and increases the wind pressure. The second blade 32 includes a second blade root 321 connected to the pressure surface 311, and a second blade top 322 away from the pressure surface 311. The second blade top 322 is connected to the shell 1. The connecting line of the front and rear ends of the second blade root 321 and the connecting line of the front and rear ends of the second blade top 322 form an acute angle, that is, the shell 1 and the pressure surface 311 extend forward and extend close to each other, so that the wind is pressurized and discharged from the gap between the shell 1 and the pressure surface 311, which is conducive to increasing the wind force and air supply distance.

[0050] refer to Figure 3 , Figure 4 , Figure 6 and Figure 7The pressurizing seat 31 is also roughly truncated cone-shaped. The radial cross-sectional area of ​​the pressurizing seat 31 at the air inlet end R is smaller than the radial cross-sectional area of ​​the pressurizing seat 31 at the air outlet end F. The pressurizing seat 31 has a relatively large radial cross-sectional area at the air outlet end F. The pressurizing seat 31 is recessed at the air outlet end F toward the air inlet end R to form a cavity 34, and the cavity 34 is used to accommodate the functional component 4. At the same time, the pressurizing seat 31 and the housing 1 form the air outlet portion 15 at the air outlet end F. The radial cross-sectional area of ​​the pressurizing seat 31 at the air outlet end F is relatively large. The wind is pressurized and discharged from the gap between the pressurizing seat 31 and the housing 1 at the air outlet end F, which is conducive to realizing the reuse of the accommodating function and the pressurizing function of the pressurizing seat 31.

[0051] refer to Figure 3 , Figure 4 , Figure 6 and Figure 7 , at least part of the pressurizing surface 311 radially increases from the air inlet end R to the air outlet end F, and at the same time, at least part of the pressurizing surface 311 is recessed toward the rotating shaft. Specifically, the pressurizing surface 311 first radially increases from the air inlet end R to the air outlet end F, and then extends forward in parallel with the rotating shaft 24. Of course, in other embodiments, the pressurizing surface 311 may first extend forward in parallel with the rotating shaft 24 from the air inlet end R to the air outlet end F, and then radially increases, or generally increases radially, or generally remains unchanged radially, or at least partially decreases radially, and is not limited thereto. The radial cross-section of the cavity 34 is circular, and the cavity 34 includes a bottom surface 341 located at the rear and a peripheral wall 342 connected to the bottom surface 341 and located in the radial direction. Corresponding to the pressurizing surface 311, the peripheral wall 342 first radially increases forward from the bottom surface 341, and then extends forward in parallel with the rotating shaft 24, so as to facilitate the fixing and disassembly of the functional component 4. Of course, the peripheral wall 342 may also be enlarged radially forward from the bottom surface 341 as a whole, or the peripheral wall 342 may first extend forward from the bottom surface 341 parallel to the rotation shaft 24 and then be enlarged radially forward, which is not limited thereto.

[0052] refer to Figure 2 , Figure 4 and Figure 7, a pressurized flow guide channel T is formed between the pressurized member 3 and the mixed flow fan 2 and the housing 1. The radial cross-sectional area of ​​the pressurized flow guide channel T at the air inlet end R is larger than the radial cross-sectional area at the air outlet end F. Air enters the pressurized flow guide channel T from the air inlet portion 14, and is discharged from the air outlet portion 15 after forming a pressurized mixed flow in the pressurized flow guide channel T. After the wind enters the mixed flow fan 2 axially from the air inlet end R, it leaves from the air outlet end F. The mixed flow fan 2 combines the advantages of large air volume of the axial flow fan and the advantages of large air pressure of the centrifugal fan. At the same time, the pressurized flow guide channel T formed between the mixed flow fan 2 and the pressurized member 3 and the housing 1 has a large radial cross-sectional area at the air inlet end R, which is conducive to absorbing air and increasing air volume; and a small radial cross-sectional area at the air outlet end F, which is conducive to compressing air and increasing wind pressure. The oblique air outlet characteristic of the mixed flow fan 2 further increases the wind pressure and the air supply distance, thereby achieving a large air volume and high air pressure on a relatively small portable bladeless fan A, achieving rapid cooling, and improving the user experience.

[0053] refer to Figure 4 , Figure 6 and Figure 7 , the mixed flow fan 2 and the pressure member 3 are arranged closely spaced in the axial direction, that is, the rotating seat 21 and the pressure seat 31 are arranged closely spaced in the axial direction, and the radial cross section of the rotating seat 21 at the air outlet end F and the radial cross section of the pressure seat 31 at the air inlet end R are both circular, and the difference in radius between the two is very small. In this embodiment, the difference in radius between the two is less than 2mm, of course, this is not a limitation, as long as the pressure surface 311 and the air guide surface 211 are also arranged closely spaced in the axial direction to block the wind from entering The equivalent seamless connection interval D2 between the rotating seat 21 and the pressurizing seat 31 blocks the wind from entering the equivalent seamless connection interval D2 between the rotating seat 21 and the pressurizing seat 31 and is blown directly in the face by the wind formed by the mixed flow fan 2 at the rear end, thereby continuing to flow forward, so that the wind can more smoothly enter the part of the pressurized flow guide channel T between the pressurizing surface 311 and the shell 1 from the part of the pressurized flow guide channel T between the wind guide surface 211 and the shell 1, thereby reducing eddy current losses and the noise of turbulent crosstalk. Specifically, the equivalent seamless connection interval D2 between the rotating seat 21 and the pressurizing seat 31 in the axial direction is 1-1.5mm, so that the wind formed by the mixed flow fan 2 can flow smoothly to the pressurizing member 3. Of course, this is not a limitation, as long as the wind entering the equivalent seamless connection interval D2 between the rotating seat 21 and the pressurizing seat 31 can be reduced.

[0054] refer to Figure 6The wind guiding surface 211 includes a first extension section 2114 adjacent to one end of the pressurizing surface 311, and the pressurizing surface 311 includes a second extension section 312 adjacent to one end of the wind guiding surface 211. The first extension section 2114 and the second extension section 312 have the same extension direction, so that the connection between the wind guiding surface 211 and the pressurizing surface 311 is smoother.

[0055] refer to Figure 7 , the first blade 22 and the second blade 32 are arranged closely spaced in the axial direction to form an equivalent partition gap D3, and the minimum equivalent partition gap D3 between the first blade 22 and the second blade 32 is 1-1.5mm, so as to prevent the airflow generated by the mixed flow fan 2 at the air outlet F from flowing back to the air inlet end R along the gap between the first blade 22 and the second blade 32 in the axial direction, and to prevent the wind from flowing in series between two adjacent second blades 32, thereby combing the airflow and increasing the air pressure, and achieving the effect of guiding the air and reducing the noise. Of course, the minimum equivalent partition gap D3 between the first blade 22 and the second blade 32 is not limited to this, as long as the airflow between the first blades 22 can flow smoothly to the second blades 32 to reduce the return loss.

[0056] Reference Figure 2 , Figure 7 and Fig. 9 , viewed from the back to the front, the first blade 22 is connected to the wind guide surface 211 and extends forward in a clockwise tilted direction, the second blade 32 is connected to the pressurizing surface 311 and extends forward in a counterclockwise tilted direction, and the connecting line of the first blade 22 connected to the front and rear ends of the wind guide surface 211 and the connecting line of the second blade 32 connected to the front and rear ends of the pressurizing surface 311 form an angle to increase the wind pressure. In addition, the curvature of the second blade 32 is greater than the curvature of the first blade 22 to further increase the wind pressure. Of course, the curvatures of the first blade 22 and the second blade 32 are not limited to this.

[0057] refer to Figure 2 and Fig. 9 In this embodiment, the number of the first blades 22 is 7, and the number of the second blades 32 is 12. In other embodiments, the ratio of the number of the first blades 22 to the number of the second blades 32 can also be in the range of 3 / 7-4 / 5. Of course, this is not limited to the above, as long as the portable bladeless fan A can ensure better wind suction ability and better wind boosting ability.

[0058] refer to Figure 4 and Figure 6From the air inlet end R to the air outlet end F, the mixed flow fan 2 and the pressurizing seat 31 are enlarged radially as a whole in a trumpet shape to form an outward-expanding pressurizing slope M. Specifically, the rotating seat 21 and the pressurizing seat 31 are enlarged radially as a whole in a trumpet shape to form an outward-expanding pressurizing slope M, and the pressurizing slope M increases the pressurization stroke of the airflow. The pressurizing slope M includes the air guide surface 211 and the pressurizing surface 311, and the two-stage pressurization, and the two-stage pressurization stroke are both increased, so that the pressurization effect is better.

[0059] refer to Figure 3 , Figure 4 , Figure 6 and Figure 7, the axial length of the front and rear ends of the rotating seat 21 is 0.8-1 or 1-1.5 times the axial length of the front and rear ends of the pressurizing seat 31, so that after the airflow is subjected to high-pressure wind gathering by the first blade 22, it is combed by the second blade 32 at an equivalent distance, ensuring the maximum usable air volume constructed by the high-pressure air volume of the final airflow generated by the pressurizing member 3 and the external negative pressure air volume, as well as the aggregated air supply distance of the maximum usable air volume. It should be understood that the high pressure of the final airflow generated by the pressurizing member 3 can drive the negative pressure air near the outside of the shell 1, thereby further increasing the air volume. Preferably, the axial length of the front and rear ends of the mixed flow fan 2 and the axial length of the front and rear ends of the pressurizing member 3 are 1:1, which can meet the requirements of large air volume in the use scenario of the portable bladeless fan A, and the product is light and thin; and the 1:1 ratio is used as a handheld, and its appearance is more in line with the symmetrical aesthetic. The pressure member 3 is provided with the cavity 34 for accommodating the functional component 4 at the air outlet end F. When the axial length at the front and rear ends of the pressure seat 31 is limited, the difference between the depth value of the cavity 34 and the length value of the pressure member 3 from the air inlet end R to the air outlet end F is less than a first difference value, and the difference between the radius value of the maximum opening of the cavity 34 and the radius value of the maximum diameter surface of the pressure member 3 at the air outlet end F is less than a second difference value, so as to realize the reuse of the pressure member 3 in the pressurizing function and the accommodating function. And in the case where the thickness of the rotating seat 21 and the pressurizing seat 31 is limited, the radius value of the bottom surface 341 of the cavity 34 adjacent to the rotating seat 21 and the radius value of the radial cross section of the shell 1 at the air outlet F can also be made smaller than the third difference value through the outward expansion of the pressurizing slope M, so that when the depth value of the cavity 34 is limited, the radial cross-sectional area of ​​the bottom surface 341 of the cavity 34 adjacent to the rotating seat 21 is increased to increase the accommodation space of the cavity 34 for accommodating the functional component 4. The first difference value and the second difference value are both 1.3-1.7mm, and the third difference value is 6.2-6.8mm, so as to ensure that the cavity 34 has sufficient accommodation space for accommodating the functional component 4 in the radial direction, and at the same time ensure that the airflow is pressurized and discharged from the gap formed between the pressurizing slope M and the shell 1 at the air outlet F. Of course, in other embodiments, the first difference value, the second difference value and the third difference value can also be adjusted to other values ​​accordingly, as long as the accommodation function and the pressurizing function of the pressurizing member 3 can be balanced.

[0060] refer to Figure 4 , Figure 6 and Figure 7The pressurized inclined surface M and the shell 1 form the pressurized flow guide channel T, and the pressurized inclined surface M includes the air guide surface 211 and the pressurized surface 311. The cooperation between the pressurized inclined surface M and the shell 1 realizes noise reduction to convert sharp noise into low sound. The pressurized flow guide channel T includes a first channel T1 and a second channel T2 connected to each other. The first channel T1 is formed between the air guide surface 211 of the mixed flow fan 2 and the first shell 11 in the radial direction, and the second channel T2 is formed between the pressurized surface 311 of the pressurized seat 31 and the second shell 12 in the radial direction. The minimum radial cross-sectional area of ​​the first channel T1 is greater than or equal to the maximum cross-sectional area of ​​the second channel T2.

[0061] refer to Figure 4 , Figure 6 and Figure 7 In the radial direction, the first housing 11 includes a first flow guiding surface 111 facing the wind guiding surface 211, the wind guiding surface 211 and the first flow guiding surface 111 are both annular, at least part of the wind guiding surface 211 is radially recessed to form a concave surface, the first flow guiding surface 111 radially increases from the air inlet end R to the air outlet end F, and at least part of the first flow guiding surface 111 radially protrudes to form a convex surface, so that the structure of the first channel T1 can gather and form a large air volume while pressurizing. Of course, this is only one form of the wind guiding surface 211 and the first flow guiding surface 111, and is not limited thereto.

[0062] refer to Figure 4 , Figure 6 and Figure 7 In the radial direction, the second shell 12 includes a second guide surface 121 facing the pressurizing surface 311, the pressurizing surface 311 and the second guide surface 121 are both annular, at least part of the pressurizing surface 311 is radially enlarged and radially recessed to form a concave surface, the second guide surface 121 is radially reduced from the air inlet end R to the air outlet end F, and at least part of the second guide surface 121 is radially protruding to form a convex surface, so that the structure of the second channel T2 can further quickly pressurize the wind with a large air volume and high wind pressure formed at the rear to form a high wind pressure wind. Of course, this is only one form of the pressurizing surface 311 and the second guide surface 121, and is not limited to this.

[0063] The first flow-guiding surface 111 and the second flow-guiding surface 121 are both convex surfaces formed by radial protrusion, and the first flow-guiding surface 111 and the second flow-guiding surface 121 first radially increase and then radially decrease from the air inlet end R to the air outlet end F to form a smooth and complete arc surface. The first flow-guiding surface 111 and the second flow-guiding surface 121 not only have the function of increasing the air volume and air pressure, but also improve the aesthetics of the shell. The radial distance between the second flow-guiding surface 121 and the rotating shaft 24 is greater than the radial distance between the first flow-guiding surface 111 and the rotating shaft 24, which is conducive to blowing the wind belt close to the middle of the rotating shaft 24 to a position relatively far away from the rotating shaft 24 in the radial direction, thereby increasing the air supply distance.

[0064] refer to Figures 4 to 6 , the axial wind at the air inlet end R is changed to flow forward along the air guide surface 211, which can make the wind closer to the axial direction flow outward; the inclined wind of the mixed flow fan 2 at the air outlet end F is changed to flow forward along the pressure surface 311, and further flows outward, so as to leave enough space at the part of the pressure member 3 close to the axis, and the enough space can be used to accommodate the functional component 4. The connecting line of the front and rear ends of the air guide surface 211 forms a first angle a with the rotating shaft 24, and the connecting line of the front and rear ends of the pressure surface 311 forms a second angle b with the rotating shaft 24. The first angle a is greater than the second angle b, so as to reduce the loss of air volume while increasing the wind pressure. The range of the first angle a is 30-45 degrees, and the range of the second angle b is 5-15 degrees. The air guide surface 211 is at least partially recessed toward the rotating shaft 24, and the axial wind at the air inlet end R flows along the air guide surface 211 with a slope jump-type increase to be rapidly pressurized. The pressurized surface 311 first increases radially and then remains unchanged radially from the air inlet end R to the air outlet end F, and both the radially increasing part and the radially unchanged part of the pressurized surface 311 are planes, and the wind formed by the mixed flow fan 2 is secondary pressurized along the pressurized surface 311 whose slope gradually decreases. The wind is rapidly pressurized by the wind guide surface 211 and secondary pressurized by the pressurized surface 311 to form high-pressure wind, so that the pressurized mixed flow generator 100 has a good blowing effect and a long air supply distance; at the same time, the two-stage inclined structure also has the effect of guiding wind and reducing noise.

[0065] refer to Figure 4 , Figure 7 and Figure 8 , from the air inlet end R to the air outlet end F, at least a portion of the air guide surface 211 is recessed toward the rotating shaft 24, so that the mixed flow fan 2 gathers the air volume and forms a first high air pressure; Figure 4 , from left to right, the distance between the radial gap between the first blade top 222 and the housing 1 in the radial direction decreases from the air inlet end R to the air outlet end F, but combined with Figure 8 , the distance of the minimum radial gap between the top 222 of the first blade and the shell 1 is maintained within the error range of the equivalent isolation distance D4, so as to isolate the airflow generated by the mixed flow fan 2 at the air outlet end F from flowing back around the minimum radial gap to the mixed flow fan 2 at the air inlet end R, thereby increasing the second high wind pressure and reducing the noise of turbulent crosstalk; the distance between any two adjacent first blades 22 gradually increases from the air inlet end R to the air outlet end F to increase the third high wind pressure; the second blade 32 forms a wind balancing flow on the mixed flow fan 2 and increases the fourth high wind pressure.

[0066] The first high wind pressure is formed on the basis of gathering a large air volume at the air inlet end R, and the second high wind pressure, the third high wind pressure and the fourth high wind pressure are increased at the same time. The mixed flow fan 2 has the ability to form a large air volume and a high wind pressure, so as to produce a large air volume and a high wind pressure in the smaller portable bladeless fan A, and increase the air supply distance, thereby perfectly meeting the needs of users.

[0067] refer to Figure 2 , Figure 3 and Fig.10 The functional component 4 is detachably fixed to the cavity 34, and an air outlet 343 is provided on the bottom surface 341. When the functional component 4 is fixed to the cavity 34, the wind from the air outlet 343 escapes forward through the surface of the functional component 4. It should be understood that the functional component 4 can be detachably fixed to the cavity by a fixing structure such as a snap structure or a magnetic structure. When the functional component 4 is removed, the portable bladeless fan A can still be used normally without the functional component 4. The functional component 4 gives the portable bladeless fan A additional functions, enriching the use scenarios of the portable bladeless fan A.

[0068] refer to Figure 2 , Figure 3 , Figure 4 and Fig.10In this embodiment, the functional component 4 is used for humidification spray. The functional component 4 includes a body 41 and a front cover 42 provided on the front side of the body 41. The body 41 includes a water storage part 411 and an atomizing part 412. The water storage part 411 is provided with a water inlet 413, a mist outlet 414 and an exhaust port 415. The water inlet 413 is used for adding water. The mist outlet 414 is located on the front side of the water storage part 411. The atomizing part 412 is correspondingly provided in front of the mist outlet 414 and is sealed with the mist outlet 414. The exhaust port 415 is used to exhaust the air in the water storage part 411. Of course, the exhaust port 415 may not be provided. The atomizing part 412 is used to spray the water in the water storage part 411 in atomized form. The front cover 42 is provided with an exhaust port 421. The exhaust port 421 reveals at least part of the atomizing part 412. A first contact 344 is provided on the wall of the cavity 34, and a second contact 43 connected to the atomizer 412 is correspondingly provided on the functional component 4. When the functional component 4 is accommodated in the cavity 34, the second contact 43 is electrically connected to the first contact 344 to supply power to the atomizer 412. Of course, in other embodiments, the functional component 4 can be an IP image item for a detachable setting, and the cavity 34 can be exposed or covered by the at least partially transparent front cover 42 to enhance the user's interaction with the IP image item. By setting it as a detachable type, it is avoided that different partners have to customize different molds. A set of molds can be connected to multiple IP partners, which can reduce the production cost of IP partners by about 40%; the exposed IP image item increases the user's direct touch of the IP image item, changing the traditional use experience. The functional component 4 can also be an aromatherapy component, a component combining humidification and aromatherapy, a component for storing USB harnesses, a mirror with LED lights, etc., and is not limited to this.

[0069] Existing handheld humidifying fans usually have a protruding water tank on the front side of the shell. Without affecting the air output, the water capacity of the water tank is far from meeting the needs of frequent atomization humidification. The water capacity of the water storage component 411 in the present application is 3 times the water capacity of existing handheld humidifying fans on the market, which can extend the use time by more than 3 times.

[0070] In this embodiment, the front end of the body 41 is flush with the front end of the shell 1, making the pressurized mixed flow generator integrated, thin, portable and beautiful, and making the water storage member 411 less likely to be scratched or collided, thereby avoiding the situation where the structure of the water storage member 411 is damaged and leaks occur, and the safety performance is higher. Of course, in other embodiments, the front end of the body 41 can also be recessed backward relative to the front end of the shell 1.

[0071] refer to Figure 2 , Figure 3 , Figure 4 and Fig.10 The mist outlet 414 includes a through hole 4141, a first matching portion 4142 located in the circumference of the through hole 4141, and a retaining portion 4143 located in the through hole 4141. The first matching portion 4142 forms a depression from front to back and makes the through hole 4141 have a depth in the circumferential direction. The retaining portion 4143 is connected to the inner wall surface of the through hole 4141. The atomizer 412 includes an atomizer sheet 4121 and a second matching portion 4122 located in the circumference of the atomizer sheet 4121. The second matching portion 4122 cooperates with the first matching portion 4142 to fix the atomizer sheet 4121 in front of the through hole 4141. The depression of the first matching portion 4142 from front to back is conducive to setting the matching and fixing structure between the atomizer 412 and the water storage member 411, and makes excellent use of space and has a beautiful appearance. The body 41 further includes a water absorbing member 416 disposed in the water storage member 411, the water absorbing member 416 at least extending upward from the bottom of the water storage member 411 to the middle of the water storage member 411, at least part of the water absorbing member 416 is located in the through hole 4141, and is sandwiched between the retaining portion 4143 and the atomizing sheet 4121. When the portable bladeless fan A is in use, the water storage member 411 is vertically disposed, and due to the arrangement of the water absorbing member 416, water below the atomizing sheet 4121 can still be absorbed by the water absorbing member 416 and transferred to the atomizing sheet 4121 for atomization, so that the position of the atomizing sheet 4121 is not limited to being disposed near the bottom of the water storage member 411, which is beneficial to increasing the water storage capacity of the water storage member 411, and allowing the water in the water storage member 411 to be well atomized and sprayed out.

[0072] The above detailed description is only an explanation of the preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and illustrations of this creation are included in the patent scope of this creation.

Claims

1. A pressurized mixed flow generator for a portable bladeless fan, characterized in that: include: A shell, with an air inlet portion at the rear side and an air outlet portion at the front side, the air inlet portion and the air outlet portion being connected in the shell; A pressurizing member connected to the front side of the housing; A mixed flow fan is located in the housing and connected to the rear side of the pressure member, and the mixed flow fan rotates around a rotating shaft to generate airflow; Wherein, a pressurized flow guide channel is formed between the pressurized component and the mixed flow fan and the shell, and the radial cross-sectional area of ​​the pressurized flow guide channel at the air inlet end is larger than the radial cross-sectional area at the air outlet end, and air enters the pressurized flow guide channel from the air inlet portion, and is discharged from the air outlet portion after forming a pressurized mixed flow in the pressurized flow guide channel; the pressurized component is provided with a cavity for accommodating functional components at the air outlet end, and the difference between the depth value of the cavity and the length value of the pressurized component from the air inlet end to the air outlet end is less than a first difference value, and the difference between the radius value of the maximum opening of the cavity and the radius value of the maximum diameter surface of the pressurized component at the air outlet end is less than a second difference value, so as to realize the reuse of the pressurizing function and the accommodating function of the pressurized component; The mixed flow fan includes a rotating seat, and the pressurizing member includes a pressurizing seat. From the air inlet end to the air outlet end, the rotating seat and the pressurizing seat are radially enlarged as a whole in a trumpet shape to form an outward-expanding pressurizing slope. When the thickness of the rotating seat and the pressurizing seat is limited, the pressurizing stroke of the airflow on the rotating seat and the pressurizing seat is increased by the outward-expanding pressurizing slope, and the difference between the radius value of the bottom surface of the cavity adjacent to the rotating seat and the radius value of the radial cross-section of the shell at the air outlet end is made less than a third difference value. When the depth value of the cavity is limited, the radial cross-sectional area of ​​the bottom surface of the cavity adjacent to the rotating seat is increased to increase the accommodating space of the cavity for accommodating the functional components. The first difference value and the second difference value are both 1.3-1.7mm, and the third difference value is 6.2-6.8mm. This ensures that the cavity has sufficient accommodating space for accommodating the functional components in the radial direction, and at the same time ensures that the airflow is pressurized and discharged from the gap formed between the pressurizing slope and the shell at the air outlet end.

2. The pressurized mixed flow generator according to claim 1, characterized in that: At least a portion of the pressurizing seat radially increases from the air inlet end to the air outlet end, and the rotating seat and the pressurizing seat are arranged closely spaced in the axial direction, and the axial distance between the rotating seat and the pressurizing seat is 1-1.5mm, so that the wind formed by the mixed flow fan can flow smoothly to the pressurizing seat.

3. The pressurized mixed flow generator according to claim 2, characterized in that: The axial length of the front and rear ends of the rotating seat is 1-1.5 times the axial length of the front and rear ends of the pressurizing seat.

4. The pressurized mixed flow generator according to claim 3, characterized in that: in, The radius of the maximum diameter surface of the pressure member at the air outlet end is 28-35 mm, which expands the blowing area while ensuring sufficient air volume and air pressure.

5. The pressurized mixed flow generator according to claim 1, characterized in that: The functional component is detachably fixed to the cavity, the radial cross-section of the cavity is circular, the cavity includes a bottom surface located at the rear and a peripheral wall connected to the bottom surface and located in the radial direction, at least a portion of the peripheral wall radially increases from the bottom surface to the front to facilitate the fixing and removal of the functional component.

6. The pressurized mixed flow generator according to claim 5, characterized in that: An air outlet is provided on the bottom surface. When the functional component is fixed to the cavity, wind from the air outlet escapes forward through the surface of the functional component.

7. The pressurized mixed flow generator according to any one of claims 1 to 6, characterized in that: The functional component is used for a detachable IP image item, and the cavity can be exposed or covered by a front cover that is at least partially transparent to enhance user interaction with the IP image item; Or, the functional component is used to store a USB harness; Or, the functional component is used for humidification spray, and the functional component includes a main body and a front cover arranged on the front side of the main body, the main body includes a water storage component and an atomizing component, the water storage component is provided with a water inlet and a mist outlet, the water inlet is used for adding water, the mist outlet is located on the front side of the water storage component, the atomizing component is correspondingly arranged in front of the mist outlet and is sealed with the mist outlet, the atomizing component is used to atomize and spray the water in the water storage component, and the front cover is provided with a mist outlet, and the mist outlet reveals at least a portion of the atomizing component.

8. The pressurized mixed flow generator according to claim 7, characterized in that: A first contact is provided on the wall surface of the cavity, and a second contact connected to the atomizer is correspondingly provided on the functional component. When the functional component is accommodated in the cavity, the second contact is electrically connected to the first contact to supply power to the atomizer.

9. The pressurized mixed flow generator according to claim 7, characterized in that: The mist outlet includes a through hole, a first matching portion located in the circumference of the through hole, and a fixing portion located in the through hole, the first matching portion forms a depression from front to back and makes the through hole have a depth in the axial direction, the atomizer includes an atomizer sheet and a second matching portion arranged in the circumference of the atomizer sheet, the second matching portion cooperates with the first matching portion to fix the atomizer sheet in front of the through hole.

10. The pressurized mixed flow generator according to claim 9, characterized in that: The main body also includes a water absorbing member arranged in the water storage member, the water absorbing member at least extends upward from the bottom of the water storage member to the middle of the water storage member, at least part of the water absorbing member is located in the through hole, and is clamped between the retaining portion and the atomizing sheet; the front end of the main body is flush with the front end of the shell, or the front end of the main body is recessed backward relative to the front end of the shell, so that the water storage member is not easily scratched or collided.

11. The pressurized mixed flow generator according to claim 1, characterized in that: The mixed flow fan uses an outer rotor brushless motor.

12. A portable bladeless fan, characterized in that: The portable bladeless fan is provided with a pressurized mixed flow generator according to any one of claims 1-11.

13. The portable bladeless fan according to claim 12, characterized in that: The portable bladeless fan is a handheld bladeless fan equipped with a handle, or a clamping fan equipped with a clip, or a versatile fan equipped with a curved shaping piece for winding, or a desktop fan equipped with a bracket, or a floor fan equipped with a telescopic bracket.

Images