Air guide frame, fan head and handheld air gathering fan

Abstract

The utility model provides an air guide frame, a fan head and a handheld air gathering fan, the air guide frame is used for being arranged at an air outlet of the fan head and guiding out air from the fan, the air guide frame comprises an inner frame and a separation ring arranged on the periphery of the inner frame, and a first air channel is formed in the periphery of the separation ring; and a second air duct is formed between the inner frame and the separation ring, and the air guide frame enables the air speed of air guided out of the second air duct to be larger than that of air guided out of the first air duct. Compared with the prior art, the air guide frame provided by the utility model is provided with the first air duct and the second air duct, so that air which is blown out of the two air ducts and has different air speeds and angles is opposite to each other, turbulent air is formed, the air is blown farther, and the body feeling is more comfortable.

Description

Technical Field

[0001] This application relates to the field of fan technology, specifically to an air guide frame, a fan head, and a handheld concentrator fan. Background Technology

[0002] Fans are often needed to cool off in hot weather. Handheld fans are a type of fan that is convenient to carry around. They reduce the size and weight of the fan and are not restricted by the mains power grid. They are powered by their own batteries and are equipped with parts that are easy for users to hold, which can meet the needs of portability to a certain extent.

[0003] However, existing fan blades have low airflow efficiency, and the airflow is easily dispersed after being blown out of the fan, which means that the airflow cannot be blown a long distance. In actual use, you need to be close to the fan outlet to feel the coolness. Once you move the fan away, the airflow will be too weak due to the dispersion of airflow, and the cooling effect will be poor, which will greatly affect the user's actual experience. Summary of the Invention

[0004] The purpose of this application is to address the deficiencies and shortcomings of the prior art by providing an air guide frame, a fan head, and a handheld concentrator fan, which has the advantage of allowing the internal air blown out by the fan head to carry the external air further by setting the fan blades into an irregular shape and setting two air ducts at the air outlet.

[0005] To achieve the above objectives, in a first aspect, the technical solution adopted in this application is: an air guide frame for being disposed at the air outlet of a fan head and for directing air from the fan, the air guide frame including an inner frame and a partition ring disposed around the inner frame, a first air duct being formed around the partition ring, and a second air duct being formed between the inner frame and the partition ring, the air guide frame enabling the air velocity of the air directed from the second air duct to be greater than the air velocity of the air directed from the first air duct.

[0006] Compared to existing technologies, the air guide frame provided in this application has a first air duct and a second air duct, which can make the wind speeds of the two air ducts different, and the winds with different speeds and angles collide with each other to form turbulent wind, thereby blowing farther and making the body feel more comfortable, thus improving the blowing effect.

[0007] In one embodiment, the air guide frame further includes a frame body disposed around the partition ring, and the first air duct is located between the frame body and the partition ring.

[0008] In one embodiment, the air guide frame further includes a first grille disposed in the first air duct, and the air guide frame further includes a second grille disposed in the second air duct, wherein the length of the first grille along the air guiding direction of the first air duct is greater than the length of the second grille along the air guiding direction of the second air duct.

[0009] In one embodiment, the number of the first grille and the number of the second grille are both multiple, and the number of the first grille is greater than or equal to the number of the second grille.

[0010] In one embodiment, the first grille is connected between the frame and the partition ring, and the second grille is connected between the partition ring and the inner frame. The frame, the first grille, the partition ring, the second grille, and the inner frame are all integrally formed.

[0011] In one embodiment, the surface of the inner frame that forms the second air duct is inclined relative to the air outlet direction of the second air duct, such that the outer diameter of the inner frame gradually increases along the air outlet direction of the second air duct.

[0012] Secondly, this application also provides a fan head, which is provided with an air inlet and an air outlet. A fan and its driving components are disposed between the air inlet and the air outlet, and the air outlet is provided with the air guide frame as described above. By using the aforementioned air guide frame, the fan head also has the beneficial effects of the air guide frame, which can achieve different wind speeds from the two air ducts, and the winds with different speeds and angles collide with each other, thereby forming turbulent wind, which can then blow farther and feel more comfortable, thus improving the blowing effect.

[0013] In one embodiment, the fan includes a hub and at least two blades arranged circumferentially along the hub. The blades include a first blade and a second blade. The first blade is connected to the hub, and the second blade is connected to the end of the first blade away from the hub. The second blade is arranged corresponding to the first air duct, and the first blade is arranged corresponding to the second air duct.

[0014] In one embodiment, there is an angle between the plane or curved surface on the same side of the first fan blade and the second fan blade; the first fan blade is a first forward-swept blade region, and the second fan blade is a second forward-swept blade region or a straight blade region, wherein the forward-swept angle of the first forward-swept blade region is greater than the forward-swept angle of the second forward-swept blade region or the straight blade region.

[0015] In one embodiment, the fan head further includes a rear cover disposed near the air inlet, the side of the rear cover away from the air inlet abutting against the air guide frame, and together with the air guide frame covering the fan and the drive assembly; the diameter of the rear cover near the air inlet is smaller than the diameter of the side away from the air inlet; the diameter of the air guide frame near the air outlet is smaller than the diameter of the side away from the air outlet.

[0016] In one embodiment, the fan head further includes a front frame and a rear frame, the front frame and the rear frame being detachably connected; the front frame and the rear frame enclose a cavity, the fan, the drive assembly, the air guide frame and the rear cover are all disposed in the cavity, the air inlet is disposed at the end of the rear frame away from the front frame, and the air outlet is disposed at the end of the front frame away from the rear frame.

[0017] In one embodiment, the rear cover is provided with an abutment rib, which abuts against the rear frame; the air guide frame is integrally formed with the front frame.

[0018] In one embodiment, the fan head further includes a decorative piece, which is detachably covered on the end of the air guide frame away from the air inlet; the decorative piece is provided with a protrusion and a positioning post, the air guide frame is provided with a slot and a positioning hole, the positioning post passes through the positioning hole, and the protrusion and the slot are detachably fastened; the decorative piece has a circular structure, and the central part protrudes towards the side away from the protrusion.

[0019] In one embodiment, the fan further includes a connector that connects the first fan blade and the second fan blade, the connector being arranged around the outside of the hub; and the distance from the connector to the air inlet is less than the distance from the hub to the air inlet.

[0020] Thirdly, this application also provides a handheld concentrator fan, including the air guide frame or the fan head as described above. The handheld concentrator fan, using the aforementioned air guide frame or fan head, can achieve different wind speeds from the two air ducts, with winds of different speeds and angles colliding with each other to form turbulent wind, thus blowing farther and providing a more comfortable experience, thereby improving the blowing effect.

[0021] The beneficial effects of this application after adopting the above technical solution are as follows:

[0022] 1. By setting an air inlet and an air outlet on the fan head, and setting a fan and its drive components between the air inlet and the air outlet, the fan includes a hub and blades. The blades are divided into at least two regions along the radial direction of the hub. The region closer to the hub is the first forward-swept blade region, and the region farther from the hub is the second forward-swept blade region or the straight blade region. The forward-swept angle of the first forward-swept blade region is greater than the forward-swept angle of the second forward-swept blade region or the straight blade region. Therefore, the wind pressure generated by the first forward-swept blade region when the hub rotates is greater than that of the second forward-swept blade region or the straight blade region, so that the airflow generated by the second forward-swept blade region or the straight blade region can be driven by the airflow generated by the first forward-swept blade region, thereby increasing the blowing distance of the entire fan.

[0023] 2. At the same time, at least two air ducts are set at the air outlet. One of them corresponds to the first forward-swept blade area so that the airflow generated by the first forward-swept blade area can be blown out of the fan head. The other air duct is set to correspond to the second forward-swept blade area or the straight blade area so that the airflow generated by the second forward-swept blade area or the straight blade area can be blown out of the fan head. This allows the airflow to be blown out of the fan head in the direction of the air duct. The air duct plays a role in dividing and guiding the airflow. The guided airflow can be blown more concentrated and farther.

[0024] 3. The air guide frame is equipped with a first air duct and a second air duct, so that the wind speeds of the two air ducts are different, and the winds blown out by the first air duct and the winds blown out by the second air duct collide with each other. The winds with different speeds and angles blown out by the two air ducts collide to form turbulent winds, which can blow farther and make the body feel more comfortable. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a perspective view of the handheld concentrator fan provided in Embodiment 1 of this application;

[0027] Figure 2 yes Figure 1 An exploded view of the handheld concentrator fan shown;

[0028] Figure 3 yes Figure 1 An exploded view of the handheld fan from another angle;

[0029] Figure 4 yes Figure 1 A schematic diagram of the air guide frame of the handheld concentrator fan shown;

[0030] Figure 5 yes Figure 1 The diagram shows the fan structure of a handheld fan.

[0031] Figure 6 yes Figure 1 A schematic diagram of the handheld fan from another angle;

[0032] Figure 7 yes Figure 2 A partial structural diagram of the handheld fan is shown.

[0033] Figure 8 This is a perspective view of the handheld concentrator fan provided in Embodiment 2 of this application;

[0034] Figure 9 yes Figure 8 The handheld fan shown is viewed from another angle, resulting in a 3D image.

[0035] Figure 10 yes Figure 8 An exploded view of the handheld concentrator fan shown;

[0036] Figure 11 yes Figure 8 An exploded view of the handheld fan from another angle;

[0037] Figure 12 yes Figure 8 The diagram shows the fan structure of a handheld fan.

[0038] Figure 13 This is a perspective view of the handheld concentrator fan provided in Embodiment 3 of this application;

[0039] Figure 14 yes Figure 12 The handheld fan shown is viewed from another angle, resulting in a 3D image.

[0040] Figure 15 yes Figure 12 An exploded view of the handheld concentrator fan shown;

[0041] Figure 16 yes Figure 12 The diagram shows an exploded view of the handheld fan from another angle.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1000. Handheld fan; 1. Handle; 101. Front shell; 102. Rear shell; 11. Button; 12. Indicator light; 13. Charging port; 2. Fan head; 201. Front frame; 202. Rear frame; 203. Cavity; 21. Air outlet; 22. Buckle; 23. Clip; 24. Air inlet; 241. Air inlet hole; 25. Decorative piece; 251. Protrusion; 252. Positioning post; 3. Air guide frame; 31. Frame; 32. First air duct; 321. First grille; 33. Second air duct; 331. Second grille; 34. 35. Separator ring; 35. Wiring hole; 351. Baffle; 352. Base plate; 36. Mounting cylinder; 361. Slot; 362. Positioning hole; 37. Inner frame; 4. Fan; 41. Hub; 42. Insertion hole; 43. Blade; 431. First forward-swept blade area; 432. Straight blade area; 433. First fan blade; 434. Second fan blade; 5. Rear cover; 51. Abutment rib; 6. Drive assembly; 61. Motor; 7. Control circuit board; 8. Battery; α. Forward sweep angle of the first forward-swept blade area; β. Forward sweep angle of the second forward-swept blade area; γ. Included angle;

[0044] 1000A, Handheld fan; 2A, Fan head; 4a, Fan; 41a, Hub; 43a, Blade; 433a, First blade; 434a, Second blade; 44a, Connector;

[0045] 1000B, Handheld fan; 2B, Fan head; 3b, Air guide frame; 31b, Frame; 201b, Front frame. Detailed Implementation

[0046] The present application will be further described in detail below with reference to the accompanying drawings.

[0047] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any innovation, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

[0048] Please see Figures 1 to 16 This application provides a handheld fan 1000, including a fan head 2 and a handle 1 connected to the fan head 2. The fan head 2 includes a fan 4 and a drive assembly 6 connected to the fan 4. The handle 1 houses a control circuit board 7 and a battery 8 electrically connected to the control circuit board 7. The drive assembly 6 is electrically connected to the control circuit board 7.

[0049] Specifically, the battery 8 is preferably a rechargeable battery. A charging interface 13 coupled to the control circuit board 7 is provided on the grip 1, and the charging interface 13 can be connected to an external power source to charge the battery 8 through the control circuit board 7. In other embodiments, the control circuit board 7 may also be located inside the fan head 2.

[0050] The handheld fan 1000 provided in this application embodiment is further provided with a button 11 and an indicator light 12 on the handle 1. The button 11 is used to control the output power of the drive component 6 to be adjusted step by step, and can also control the switch of the drive component 6. At least one indicator light 12 is provided. When there are two or more indicator lights 12, the illumination of different numbers of indicator lights 12 can indicate the battery level or the output power level of the drive component 6.

[0051] The following section will provide a detailed description of fan head 2.

[0052] Example 1

[0053] This embodiment relates to a fan head 2, such as Figure 1 , Figure 2 and Figure 3 As shown, the fan head 2 is cylindrical. Specifically, the fan head 2 is assembled from a front frame 201 and a rear frame 202, forming a cavity 203 between the front frame 201 and the rear frame 202. The fan 4 and its drive assembly 6 are disposed in the cavity 203. The fan head 2 is provided with an air inlet 24 and an air outlet 21. Specifically, the air outlet 21 is disposed on the front frame 201, and the air inlet 24 is disposed on the rear frame 202. The fan 4 and its drive assembly 6 are disposed between the air inlet 24 and the air outlet 21. Both the air outlet 21 and the air inlet 24 are connected to the cavity 203. The drive assembly 6 is used to drive the fan 4 to rotate, so that air enters the cavity 203 through the air inlet 24 and then flows out through the air outlet 21, thereby forming an airflow or wind, which plays a role in cooling.

[0054] It should be noted that the front frame 201 and the rear frame 202 are detachably connected. Specifically, the front frame 201 is provided with a buckle 22, and the rear frame 202 is provided with a locking block 23. The buckle 22 can engage with the locking block 23, thereby achieving a fixed assembly of the front frame 201 and the rear frame 202. This eliminates the need for screws or glue, improving assembly efficiency and reducing production costs. In a modified embodiment, the front frame 201 may be provided with a locking block 23, and the rear frame 202 may be provided with a buckle 22, achieving a detachable connection between the two. In other embodiments, the front frame 201 and the rear frame 202 are provided with screw holes, and assembly is achieved by screws; alternatively, the front frame 201 and the rear frame 202 may be glued together.

[0055] Preferably, the drive assembly 6 includes a motor 61, the output shaft of which is connected to the fan 4 to drive the fan 4 to rotate. The fan 4 is a mixed-flow fan. The fan 4 includes a hub 41 and multiple blades 43 arranged circumferentially along the hub 41, with at least two blades 43. The hub 41 has a generally conical structure, and a socket 42 is provided on the rotation center line of the hub 41. The socket 42 is for the output shaft of the drive assembly 6 to be inserted, thereby causing the drive assembly 6 to drive the hub 41 to rotate. The rotation of the hub 41 drives the blades 43 to rotate, drawing in airflow from the air inlet 24 and blowing airflow out towards the air outlet 21. In other embodiments, the fan 4 is an axial flow fan. In this embodiment, there are 7 blades 43; the 7 blades 43 are distributed circumferentially along the hub 41. When the motor 61 starts, the output shaft drives the hub 41 to rotate, thereby driving the blades 43 to rotate, thus forming airflow that flows out through the air outlet 21.

[0056] Please see Figures 2 to 6 In this embodiment, the blade 43 includes a first blade 433 and a second blade 434. The first blade 433 is connected to the hub 41, and the second blade 434 is connected to the end of the first blade 433 away from the hub 41. An angle γ is formed between the plane or curved surface on the same side of the first blade 433 and the second blade 434. Specifically, in this embodiment, the relatively large surfaces on both sides of the first blade 433 and the second blade 434 are curved surfaces, and the connection between the first blade 433 and the second blade 434 has an angle γ. In other embodiments, the relatively large surfaces on both sides of the first blade and the second blade can be planes.

[0057] like Figure 5 and Figure 6 As shown, the blade 43 is radially divided into at least two regions along the hub 41. The two regions are connected to each other and form an angle between them. The region closer to the hub 41 is the first forward-swept blade region 431, and the region farther from the hub 41 is the second forward-swept blade region or the straight blade region 432. The forward sweep angle of the first forward-swept blade region 431 is greater than the forward sweep angle of the second forward-swept blade region. That is, in this embodiment, the first blade 433 is the first forward-swept blade region 431, and the second blade 434 is the second forward-swept blade region or the straight blade region 432. The forward sweep angle α of the first forward-swept blade region 431 is greater than the forward sweep angle β of the second forward-swept blade region or the straight blade region 432. The forward sweep angle α of the first forward-swept blade area 431 is greater than the forward sweep angle β of the second forward-swept blade area or the straight blade area 432. Therefore, the wind pressure generated by the first forward-swept blade area 431 when the hub 41 rotates is greater than that of the second forward-swept blade area or the straight blade area 432, so that the airflow generated by the second forward-swept blade area or the straight blade area 432 can be driven by the airflow generated by the first forward-swept blade area 431, thereby increasing the blowing distance of the entire fan 4.

[0058] like Figure 6As shown, in this embodiment, a region away from the hub 41 is the forward-swept blade region 432, and the blades in the forward-swept blade region 432 are aligned forward-swept with the hub 41. There is a forward-swept angle α between the blades of the first forward-swept blade region 431 and the hub 41, with the forward-swept angle α ranging from 20-30°. In other embodiments, a region away from the hub 41 is the second forward-swept blade region, and the forward-swept angle β of the second forward-swept blade region is smaller than the forward-swept angle α of the first forward-swept blade region 431, i.e., the forward-swept angle β of the second forward-swept blade region ranges from 10-19°.

[0059] Existing handheld fans simply have an air outlet structure without guiding the airflow generated by the fan. This results in the airflow from the handheld fan being chaotic and easily dispersed, leading to a shorter airflow distance, less concentrated airflow, and a poor user experience.

[0060] Please see Figure 4 To ensure a more comfortable and longer-distance airflow, at least two air ducts are provided at the air outlet 21. One air duct corresponds to the first forward-swept blade area 431, allowing the airflow generated by the first forward-swept blade area 431 to pass through; this air duct is the second air duct 33. The other air duct is the first air duct 32, which corresponds to the second forward-swept blade area or the straight blade area 432, allowing the airflow generated by the second forward-swept blade area or the straight blade area 432 to pass through. It can be understood that the first blade 433 corresponds to the second air duct 33, and the first blade 433 drives the second airflow through the second air duct 33 before exiting through the air outlet 21. The second blade 434 corresponds to the first air duct 32, and the second blade 434 drives the first airflow through the first air duct 32 before exiting through the air outlet 21. Specifically, the wind speed of the first airflow blown out of the first air duct 32 is less than the wind speed of the second airflow blown out of the second air duct 33. The arrangement of the first blade 433 and the second blade 434 allows the fan 4 to drive the air to form a second airflow and a first airflow with different air pressures when it rotates. This results in different concentrations and wind speeds of the second and first airflows, allowing the winds with different speeds and angles from the two air ducts to collide with each other and form turbulent winds, which in turn blows farther and feels more comfortable.

[0061] Both the first air duct 32 and the second air duct 33 are arranged in a ring shape. The diameter of the first air duct 32 is larger than that of the second air duct 33, and the first air duct 32 is arranged around the outer ring of the second air duct 33. After the high-pressure airflow generated by the first forward-swept blade area 431 is blown out through the second air duct 33, the direct airflow blown out by the front blade area 432 is blown out through the first air duct 32. At this time, the high-pressure airflow can drive the direct airflow to be blown a longer distance, reducing airflow dissipation caused by the limitation of the usage distance and improving the user's actual experience.

[0062] like Figure 4As shown, an air outlet 21 is provided with an air guide frame 3, which is arranged in a ring shape. The outer ring of the air guide frame 3 abuts against the front frame 201 of the fan head 2. Specifically, multiple abutment ribs 51 can also be provided on the outer ring of the air guide frame 3. The abutment ribs 51 can increase the contact area between the air guide frame 3 and the front frame 201. After abutting, the air guide frame 3 can reduce the vibration generated by the fan 4 during rotation and transmit it to the front frame 201, thereby reducing noise. The first grille 321 is arranged parallel to the airflow direction of the fan 4, and the second grille 331 is arranged at an angle to the airflow direction of the fan 4.

[0063] like Figure 7 As shown, a rear cover 5 is mounted on the air inlet 24. The rear cover 5 is ring-shaped, and multiple abutment ribs 51 are provided on the outer side of the rear cover 5 to abut against the rear frame 202, thereby reducing the vibration generated by the fan 4 during rotation and transmitting it to the front frame 201, thus indirectly reducing noise. At the same time, the inner side of the rear cover 5 is arc-shaped, and the rear cover 5 can abut against the air guide frame 3, thereby covering the sides of the fan 4 and the drive assembly, which can reduce the turbulence phenomenon generated by the airflow on the irregular surfaces of the front frame 201 and the rear frame 202.

[0064] Specifically, the diameter of the rear cover 5 near the air inlet 24 is smaller than the diameter of the end away from the air inlet 24; the diameter of the air guide frame 3 near the air outlet 21 is smaller than the diameter of the end away from the air outlet 21. The design of the rear cover 5 structure allows air to be pressurized and pushed by the fan 4, thereby generating an airflow with a certain velocity that flows out from the air outlet 21.

[0065] Continue reading Figure 4 It should be added that the air guide frame 3 includes a frame 31, and a partition ring 34 is connected to the inner ring of the air guide frame 3. A first air duct 32 is formed between the frame 31 and the partition ring 34, and a second air duct 33 is formed within the inner ring of the partition ring 34. Specifically, the inner ring of the partition ring 34 is provided with an inner frame 37, and the second air duct 33 is formed between the inner frame 37 and the partition ring 34. Specifically, the air guide frame 3 enables the wind speed blowing out of the first air duct 32 to be lower than the wind speed blowing out of the second air duct 33, that is, the wind speed of the wind exiting from the second air duct 33 is greater than the wind speed exiting from the first air duct 32. This achieves a lower wind speed and smaller wind speed variation in the wind blowing out of the first air duct 32, and a higher wind speed and smaller wind speed variation in the wind exiting from the second air duct 33. When the two winds collide, turbulent wind is formed, resulting in a longer blowing distance and a more comfortable feeling. The air guide frame 3 is designed to achieve two air channels, which is simple in structure and low in cost, and makes the air blowing distance farther, more comfortable, and improves the air blowing effect.

[0066] In other embodiments, a partition ring is also connected to the inner ring of the partition ring 34, thereby forming a second air duct 33 between the partition ring 34 and the partition ring, and a third air duct within the partition ring. Simultaneously, a third forward-swept blade area is also provided between the first forward-swept blade area 431 on the fan 4 and the hub 41. The third forward-swept blade area corresponds to the third air duct, and the forward-swept angle of the third forward-swept blade area is different from that of the first forward-swept blade area 431. A fourth or fifth air duct can also be provided outside the air guide frame 3; the number of air ducts and forward-swept blade areas is not limited.

[0067] Preferably, an installation cylinder 36 is connected to the inner ring of the partition ring 34. The installation cylinder 36 is cylindrical, with its opening facing the air inlet 24. The opening of the installation cylinder 36 allows the drive assembly 6 to be installed and fixed. The outer side of the installation cylinder 36 is connected to the inner frame 37. In this embodiment, the second air duct 33 is disposed between the installation cylinder 36 and the partition ring 34, therefore the air volume of the first air duct 32 is greater than the air volume of the second air duct 33.

[0068] It should be added that multiple first grilles 321 are connected between the frame 31 of the air guide frame 3 and the partition ring 34, and multiple second grilles 331 are connected between the partition ring 34 and the inner frame 37. The first grilles 321 and the second grilles 331 allow the partition ring 34 and the inner frame 37 to be positioned on the air outlet 21 of the air guide frame 3. Simultaneously, the length of the first grille 321 along the direction from the air inlet 24 to the air outlet 21 is greater than the length of the second grille 331 along the same direction, thus allowing the airflow through the first grille 321 to be relatively straighter than that through the second grille 331. The first grille 321 is located in the first air duct 32, and the second grille 331 is located in the second air duct 33. The first grille 321 extends in the first air duct 32 along the first airflow direction, and the extension direction of the second grille 331 in the second air duct 33 intersects with the first airflow direction. The first grille 321 is relatively long, which guides the first airflow as it passes through the first air duct 32, allowing the first airflow to flow in a preset direction. Since the second airflow has relatively high air pressure and is more concentrated, the second grille 331 is relatively short, which avoids affecting the flow rate of the second airflow.

[0069] Specifically, in this embodiment, there are 5 first grilles 321 and 2 second grilles 331. The first grilles 321 and the second grilles 331 are used to connect the various components of the air guide frame 3, making the structure of the air guide frame 3 more stable.

[0070] Preferably, the first grille 321 is arranged parallel to the airflow direction of the fan 4, that is, the airflow from the fan 4 is kept in a direct current and blown out of the air outlet 21 through the first grille 321. The second grille 331 is arranged at an angle to the airflow direction of the fan 4, that is, the airflow from the fan 4 is tilted and rotated as it passes through the second grille 331 and blown out of the air outlet 21. This allows the rotating high-pressure airflow to drive the direct current airflow to travel a greater distance.

[0071] In other embodiments, the first grille 321 is inclined to the direction of the airflow blown out by the fan 4, or the second grille 331 is parallel to the direction of the airflow blown out by the fan 4. It can be inclined or vertical according to different usage requirements. For example, the second grille 331 is parallel to the direction of the airflow blown out by the fan 4 in order to reduce noise.

[0072] The width of the first air duct 32 at the end furthest from the air outlet 21 is greater than the width at the end closest to the air outlet 21; the width of the second air duct 33 at the end furthest from the air outlet 21 is less than the width at the end closest to the air outlet 21. That is, the cross-sectional area of ​​the first air duct 32 decreases along the direction from the air inlet 24 to the air outlet 21. This not only facilitates demolding but also allows the first airflow to gradually concentrate as it flows from the first air duct 32 to the air outlet 21, preventing airflow dispersion and resulting in a more concentrated airflow and a longer blowing distance. The cross-sectional area of ​​the second air duct 33 near the fan is greater than or equal to the cross-sectional area of ​​the air outlet side of the second air duct 33. This allows the second airflow to come into contact with the first airflow after exiting the air outlet 21, thus propelling the first airflow a longer distance. This duct width design facilitates demolding of the air guide frame 3 during production, improving production efficiency and yield. Specifically, the surface of the inner frame 37 that forms the second air duct 33 is inclined relative to the air outlet direction of the second air duct 33, so that the outer diameter of the inner frame 37 gradually increases along the air outlet direction of the second air duct 33 and the air outlet direction gradually becomes more uniform.

[0073] Specifically, in this embodiment, the frame 31, the first grille 321, the partition ring 34, the second grille 331, and the inner frame 37 are all integrally formed, which facilitates production and assembly, while ensuring the strength of the air guide frame 3.

[0074] To enhance the product's appearance, the fan head 2 includes a decorative piece 25, which detachably covers the end of the mounting cylinder 36 furthest from the air inlet 24. The decorative piece 25 features a protrusion 251 and a positioning post 252. The mounting cylinder 36 has a slot 361 and a positioning hole 362, with the positioning post 252 passing through the positioning hole 362. The protrusion 251 and slot 361 are detachably engaged. To ensure strength, the decorative piece 25 is circular, with its center protruding towards the side furthest from the protrusion 251. The decorative piece 25 enhances the product's appearance, making it more aesthetically pleasing and easier to assemble as it is detachable.

[0075] This embodiment relates to a handheld concentrator fan 1000, such as... Figures 1 to 7 As shown, the handheld fan 1000 is provided with the aforementioned fan head 2, and an additional handle 1 is provided at the bottom of the fan head 2. The handle 1 is specifically composed of a front shell 101 and a rear shell 102, wherein the front shell 101 corresponds to the front frame 201 of the fan head 2, and the rear shell 102 corresponds to the rear frame 202 of the fan head 2. The front shell 101 and the rear shell 102 are also assembled by a buckle 22 and a locking block 23.

[0076] In this embodiment, the front shell 101 and the front frame 201 are integrally formed, and the rear shell 102 and the rear frame 202 are integrally formed, with the front shell 101 and the front frame 201 communicating with each other. In other embodiments, the front shell 101 and the front frame 201 are snap-fitted together, and the rear shell 102 and the rear frame 202 are also snap-fitted together. The snap-fitting assembly can be achieved by interlocking positioning blocks.

[0077] Preferably, a control circuit board 7 and a battery 8 coupled to the control circuit board 7 are disposed within the grip 1. The battery 8 can supply power to the drive assembly 6 through the control circuit board 7, and can also supply power to other electronic components coupled to the control circuit board 7. The battery 8 is preferably a rechargeable battery. A charging interface 13 coupled to the control circuit board 7 is disposed on the grip 1, and the charging interface 13 can be connected to an external power source to charge the battery 8 through the control circuit board 7. In other embodiments, the control circuit board 7 may also be disposed within the fan head 2.

[0078] It should be added that other electronic components coupled to the control circuit board 7 are buttons 11 and indicator lights 12. Buttons 11 can control the output power of the drive component 6 to be adjusted step by step, and can also control the switch of the drive component 6. Multiple indicator lights 12 are provided. The illumination of different numbers of indicator lights 12 can indicate the power level of the battery 8, or indicate which level the output power of the drive component 6 is at.

[0079] It should be added that a wiring hole 35 is also provided on the air guide frame 3. The wiring hole 35 extends from the outer ring of the air guide frame 3 to the inner wall of the mounting cylinder 36. The control circuit board 7 and the drive component 6 are coupled by wires. Therefore, the wires can be connected from the control circuit board 7 to the drive component 6 inside the mounting cylinder 36 through the wiring hole 35. The design of the wiring hole 35 allows for more reasonable wiring.

[0080] Specifically, in order to make the product look more beautiful and neat, the wiring hole 35 is formed by two opposing baffles 351 and a base plate 352. The baffles 351 and the base plate 352 are respectively connected to the frame 31, the partition ring 34 and the mounting cylinder 36, which can also increase the connection strength between the three.

[0081] Compared to existing technologies, the fan head 2 provided in this application is provided with a first air duct 32 and a second air duct 33, and a second fan blade 434 and a first fan blade 433 are respectively provided corresponding to the first air duct 32 and the second air duct 33. The plane or curved surface on the same side of the first fan blade 433 and the second fan blade 434 has an angle, so that the wind pressure generated by the second airflow driven by the first fan blade 433 when rotating is different from the wind pressure generated by the first airflow driven by the second fan blade 434. This makes one of the airflows more concentrated, and the airflow flowing out from one air duct can carry the airflow flowing out from the other air duct a longer distance, thereby increasing the blowing distance of the fan head 2. At the same time, the design of two air ducts allows the second airflow and the first airflow to flow in different air ducts, which plays a role in diverting and guiding the flow. This makes the flow of one airflow more concentrated and the other airflow more gentle. Moreover, the different flow velocities of the two airflows can collide with each other to form turbulent wind, thereby blowing a longer distance and providing a more comfortable experience. In this embodiment, the second airflow blown out from the second air duct 33 has a higher air pressure, a more concentrated airflow and a higher wind speed, and can blow further; the first airflow blown out from the first air duct 32 surrounds the second airflow, is gentler and has a lower wind speed; due to the design of the air duct structure, the second airflow comes into contact with the first airflow after being blown out from the air outlet, which can drive the first airflow to blow further.

[0082] Example 2

[0083] Please see Figures 8 to 12 Embodiment 2 provides a fan head 2A and a handheld polymer fan 1000A using the fan head 2A.

[0084] The structure of the fan head 2A in Embodiment 2 is mostly the same as that of the fan head 2 in Embodiment 1. In order to facilitate a quick understanding of the differences between the fan head 2A in Embodiment 2, the same structural parts will not be described again. The following will describe in detail the differences of the fan 4a in the fan head 2A, and use different labels to distinguish different components. The labels of the same structural parts will continue to use the labels in Embodiment 1.

[0085] Please see Figures 10 to 12In this embodiment, the fan 4a includes a hub 41a and a plurality of blades 43a arranged circumferentially along the hub 41a. Each blade 43a includes a first blade 433a, a second blade 434a, and a connector 44a connecting the first blade 433a and the second blade 434a. The connector 44a has a generally annular structure, surrounding the hub 41a. One end of the first blade 433a is connected to the hub 41a, and the other end is connected to the connector 44a. The side of the connector 44a furthest from the first blade 433a is connected to the second blade 434a. The distance from the connector 44a to the air inlet 24 is less than the distance from the hub 41a to the air inlet 24. Specifically, the end of the connector 44a near the air inlet 24 extends beyond the end of the hub 41a near the air inlet 24. The connector 44a makes the structure of the blades 43a more stable.

[0086] In this embodiment, the structure of the other parts of the product is the same as that in Embodiment 1, and will not be described again.

[0087] It is understood that the difference between this embodiment and embodiment one is that embodiment one uses the first fan blade 433 and the second fan blade 434 connected internally and externally to provide different airflow to the first air duct 32 and the second air duct 33 respectively, so that the air outlet distance of the second air duct 32 is farther. In this embodiment, two sets of independent inner first fan blades 433a and outer second fan blades 434a are used to provide different airflow to the first air duct 32 and the second air duct 33 respectively, so that the air outlet distance of the second air duct 33 is farther. The design space of the two sets of independent inner first fan blades 433a and outer second fan blades 434a in this embodiment is higher than that of the fan blades in embodiment one, and the flexibility is greater.

[0088] Example 3

[0089] Please see Figures 13 to 16 In Embodiment 3, another fan head 2B is provided, and a handheld polyfan 1000B employing fan head 2B is provided.

[0090] The structure of the fan head 2B in Embodiment 3 is mostly the same as that of the fan head 2 in Embodiment 1. In order to facilitate a quick understanding of the differences between the fan head 2B in Embodiment 3, the same structural parts will not be described again. The following will describe the differences in the fan head 2B in detail, and use different labels to distinguish different parts. The labels of the same structural parts will continue to use the labels in Embodiment 1.

[0091] Please see Figure 15 and Figure 16In this third embodiment, to facilitate production assembly, improve assembly efficiency, and reduce assembly steps, the air guide frame 3b is integrally formed with the front frame 201b, and the front frame 201b covers the air guide frame 3b. Specifically, the frame 31b is integrally formed with the front frame 201b, and the frame 31b is located inside the front frame 201b. This reduces one assembly step, improves assembly efficiency, and reduces corresponding labor costs.

[0092] In this embodiment, the structure of the other parts of the product is the same as that in Embodiment 1, and will not be described again.

[0093] The above is only used to illustrate the technical solution of this application and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this application, as long as they do not depart from the spirit and scope of the technical solution of this application, should be covered within the scope of the claims of this application.

Claims

1. An air guide frame (3) for being disposed at the air outlet (21) of a fan head (2), the fan head (2) having a fan (4), the air guide frame (3) for directing airflow from the fan (4), characterized in that, The air guide frame (3) includes an inner frame (37) and a partition ring (34) disposed around the inner frame (37). A first air duct (32) is formed around the partition ring (34), and a second air duct (33) is formed between the inner frame (37) and the partition ring (34). The air guide frame (3) enables the wind speed of the wind exiting from the second air duct (33) to be greater than the wind speed of the wind exiting from the first air duct (32). The air guide frame (3) further includes a first grille (321) and a second grille (331). The first grille (321) is disposed in the first air duct (32), and the second grille (331) is disposed in the second air duct (33). The first grille (321) is parallel to the airflow direction of the fan (4), so that the airflow blown by the fan (4) is kept in a direct current and blown out of the air outlet (21) through the first grille (321). The second grille (331) is inclined to the airflow direction of the fan (4), so that the airflow blown by the fan (4) is inclined and rotated and blown out of the air outlet (21) through the second grille (331).

2. The air guide frame (3) as described in claim 1, characterized in that, The air guide frame (3) also includes a frame (31), which is disposed around the partition ring (34), and the first air duct (32) is located between the frame (31) and the partition ring (34).

3. The air guide frame (3) as described in claim 2, characterized in that, The length of the first grille (321) along the air guiding direction of the first air duct (32) is greater than the length of the second grille (331) along the air guiding direction of the second air duct (33).

4. The air guide frame (3) as described in claim 3, characterized in that, The number of the first grille (321) and the number of the second grille (331) are both multiple, and the number of the first grille (321) is greater than or equal to the number of the second grille (331).

5. The air guide frame (3) as described in claim 3, characterized in that, The first grille (321) is connected between the frame (31) and the partition ring (34), and the second grille (331) is connected between the partition ring (34) and the inner frame (37). The frame (31), the first grille (321), the partition ring (34), the second grille (331), and the inner frame (37) are all integrally formed.

6. The air guide frame (3) as described in claim 1, characterized in that, The cross-sectional area of ​​the second air duct (33) near the fan is greater than or equal to the cross-sectional area of ​​the air outlet side of the second air duct (33).

7. A fan head, wherein the fan head is provided with an air inlet (24) and an air outlet (21), and a fan (4) and its driving assembly (6) are disposed between the air inlet (24) and the air outlet (21), characterized in that, The air outlet (21) is provided with an air guide frame (3) as described in any one of claims 1-6.

8. The fan head according to claim 7, characterized in that, The fan (4) includes a hub (41) and at least two blades (43) arranged circumferentially along the hub (41). The blades (43) include a first blade (433) and a second blade (434). The first blade (433) is connected to the hub (41), and the second blade (434) is connected to the end of the first blade (433) away from the hub (41). The second blade (434) is arranged corresponding to the first air duct (32), and the first blade (433) is arranged corresponding to the second air duct (33).

9. The fan head according to claim 8, characterized in that, There is an angle (γ) between the plane or curved surface on the same side of the first fan blade (433) and the second fan blade (434); the first fan blade (433) is the first forward-swept blade area (431), the second fan blade (434) is the second forward-swept blade area or the straight blade area (432), and the forward-swept angle (α) of the first forward-swept blade area (431) is greater than the forward-swept angle (β) of the second forward-swept blade area or the straight blade area (432).

10. The fan head according to claim 7, characterized in that, The fan head also includes a rear cover (5) located near the air inlet (24). The side of the rear cover (5) away from the air inlet (24) abuts against the air guide frame (3) and is covered by the air guide frame (3) outside the fan (4) and the drive assembly (6). The diameter of the rear cover (5) near the air inlet (24) is smaller than the diameter of the side away from the air inlet (24). The diameter of the air guide frame (3) near the air outlet (21) is smaller than the diameter of the side away from the air outlet (21).

11. The fan head according to claim 10, characterized in that, The fan head also includes a front frame (201) and a rear frame (202), the front frame (201) and the rear frame (202) are detachably connected; the front frame (201) and the rear frame (202) enclose a cavity (203), the fan (4), the drive assembly (6), the air guide frame (3) and the rear cover (5) are all located in the cavity (203), the air inlet (24) is located at the end of the rear frame (202) away from the front frame (201), and the air outlet (21) is located at the end of the front frame (201) away from the rear frame (202).

12. The fan head according to claim 11, characterized in that, The rear cover (5) is provided with an abutment rib (51), which abuts against the rear frame (202); the air guide frame (3) is integrally formed with the front frame (201).

13. The fan head according to claim 7, characterized in that, The fan head also includes a decorative piece (25), which is detachably covered by the air guide frame (3) at the end away from the air inlet (24); the decorative piece (25) is provided with a protrusion (251) and a positioning post (252), the air guide frame (3) is provided with a slot (361) and a positioning hole (362), the positioning post (252) passes through the positioning hole (362), and the protrusion (251) is detachably fastened to the slot (361); the decorative piece (25) is a circular structure, and the central part protrudes towards the side away from the protrusion (251).

14. The fan head according to claim 8, characterized in that, The fan also includes a connector (44a) that connects the first fan blade (433a) and the second fan blade (434a), and the connector (44a) surrounds the hub; and the distance from the connector (44a) to the air inlet (24) is less than the distance from the hub to the air inlet (24).

15. A handheld concentrator fan, characterized in that, It includes the air guide frame (3) as described in any one of claims 1-6, or the fan head as described in any one of claims 7-14.

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