High-speed wind-gathering handheld fan

Abstract

The utility model discloses a high-speed wind gathering handheld fan which comprises an air duct shell, an air duct is arranged in the air duct shell, a motor base is arranged at the position of the axis of the air duct, the upper portion of the circumferential wall face of the motor base extends outwards in the radial direction to form wind guiding blades, and each wind guiding blade comprises a parallel portion and an inclined wind cutting portion. The parallel part is arranged close to one side of the air outlet, the parallel part is parallel to the axis of the air outlet, the inclined air cutting part is arranged close to one side of the air inlet, the inclined air cutting part is arranged deviating from the plane where the parallel part is located, the extending surface of the inclined air cutting part is axially intersected with the fan blade group, and the air outlet is covered with an air gathering cover. Air flow is blown out after being pressurized, accelerated, turbulent-flow-removed and noise-reduced under the common matching action of the driving fan blade group, the air guide blades, the pressurizing surface and the air gathering cover, so that the air speed is greatly increased, the air supply distance is greatly increased, and meanwhile, the mute and noise-reducing effects are achieved.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically a high-speed wind-concentrating handheld fan. Background Technology

[0002] When going out or engaging in outdoor activities in the summer, the weather is quite hot, and there may be situations where there is no air conditioning. In order to make it convenient to cool off at any time, portable fans have emerged and are widely popular because they are easy to carry and can be used anytime.

[0003] However, due to its small size, the electrical components it is equipped with can only use low power. Therefore, traditional portable fans cannot be designed to have a large airflow, resulting in poor cooling effect. Although some manufacturers have applied the structure of traditional booster fans to these small portable fans to increase airflow and improve cooling effect, such as Chinese patent (authorization announcement number: CN217029352U), they did not take into account the problem of airflow turbulence, resulting in very loud noise during operation, which seriously affects the user experience and is not conducive to the widespread application of the product. Utility Model Content

[0004] The purpose of this invention is to provide a high-speed, wind-concentrating handheld fan. The airflow is pressurized and accelerated, turbulence is eliminated, and noise is reduced, all through the combined action of the fan blade assembly, guide vanes, pressure-boosting surface, and wind-concentrating cover before being blown outward. This not only significantly increases the wind speed and delivery distance but also achieves a quiet and noise-reducing effect, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-speed wind-gathering handheld fan, comprising a duct housing, an air duct being disposed inside the duct housing, a motor base being disposed at the axis of the air duct, a drive fan blade assembly being mounted on the motor base, an air inlet and an air outlet being respectively disposed at both ends of the air duct, the air duct being connected to the air inlet and the air outlet, the drive fan blade assembly guiding air located at the air inlet into the air duct and then blowing it outward from the air outlet, a portion of the circumferential wall surface of the motor base extending radially outward to form guide vanes, the guide vanes being located in the direction of the drive fan blade assembly. On one side of the air outlet, the guide vane includes a parallel portion and an inclined air-cutting portion. The parallel portion is located near the air outlet and is parallel to the air outlet axis. The inclined air-cutting portion is located near the air inlet and is offset from the plane of the parallel portion. Its extension surface intersects the axis of the drive fan blade assembly. The lower end portion of the air duct housing extends downward to form a handle front shell. A handle rear shell is installed on the rear side of the handle front shell. A cavity is formed between the handle front shell and the handle rear shell. A circuit board assembly and a battery are installed in the cavity. The battery is electrically connected to the circuit board assembly.

[0006] Preferably, the inclined wind-cutting part is a curved surface, the extension surface of which intersects with the axis of the drive fan blade assembly, the inner surface of which is the wind-receiving surface, the drive fan blade assembly includes a rotating seat and wind-driving blades evenly arranged on the outer peripheral wall of the rotating seat, the surface of the wind-driving blades facing the air outlet is the wind-driving surface, the wind-receiving surface and the curved surface of which the wind-driving surface are located intersect, and the wind-receiving surface and the wind-driving surface form an angle of less than 90°.

[0007] Preferably, the angle between the wind-receiving surface and the central axis of the drive fan blade assembly is between 30° and 60°.

[0008] Preferably, the motor base has an electrical cavity on the side facing the air outlet, the electrical cavity can be used to load the functional module, and the opening of the electrical cavity is covered with a sealing cover.

[0009] Preferably, the circuit board assembly is electrically connected to a display screen, which is disposed in a pre-set through hole in the front shell of the handle. A light-transmitting cover is installed on the outside of the through hole, and the display content of the display screen is displayed outward through the light-transmitting cover.

[0010] Preferably, the outer peripheral wall of the motor base includes a pressure-boosting surface that at least partially increases radially from the air inlet to the air outlet.

[0011] Preferably, the air outlet is covered with a wind concentrator, the inner diameter of which gradually decreases from the air inlet to the air outlet.

[0012] Preferably, the circuit board assembly is electrically connected to a control button and a USB interface. The control button is located in a pre-set through hole in the front shell of the handle and is connected to the button panel. The USB interface is located in a pre-set through hole in the rear shell of the handle and extends outward from the through hole.

[0013] Preferably, the air inlet is covered with an air inlet cover, which is a perforated cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the airflow is pressurized and accelerated, turbulence is eliminated, and noise is reduced through the combined action of the drive fan blade assembly, guide vanes, pressurizing surface, and wind-gathering shroud before being blown outward. This not only significantly increases the wind speed and delivery distance but also achieves the effect of quiet operation and noise reduction. Attached Figure Description

[0016] Figure 1 This is an exploded view of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the air duct shell structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional orientation of the wind-gathering cover AA of this utility model;

[0019] Figure 4 This is a cross-sectional view of the wind-concentrating cover AA of this utility model;

[0020] Figure 5 This is a perspective view of the appearance of this utility model;

[0021] Figure 6 This is a schematic diagram of the BB cross-section orientation of this utility model;

[0022] Figure 7 This is a cross-sectional view of the present invention.

[0023] In the diagram: 1. Wind concentrator; 2. Encapsulation cover; 3. Display screen; 4. Air duct housing; 41. Motor base; 42. Guide vane; 421. Parallel section; 422. Inclined air cutting section; 423. Air receiving surface; 43. Electrical cavity; 44. Pressure boosting surface; 45. Handle front housing; 5. Drive fan blade assembly; 51. Air driving surface; 6. Air inlet cover; 7. Circuit board assembly; 71. Control buttons; 72. USB interface; 8. Battery; 9. Handle rear housing. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-7A high-speed, wind-concentrating handheld fan includes a duct housing 4, inside which a duct is disposed. A motor base 41 is disposed along the axis of the duct, and a drive fan blade assembly 5 is mounted on the motor base 41. An air inlet and an air outlet are respectively disposed at both ends of the duct, and the duct is connected to the air inlet and the air outlet. The drive fan blade assembly 5 guides air located at the air inlet into the duct and then blows it outward from the air outlet. A portion of the circumferential wall of the motor base 41 extends radially outward to form a guide vane 42. The guide vane 42 is located on the side of the drive fan blade assembly 5 facing the air outlet. The guide vane 42 includes a parallel portion 421 and an inclined air-cutting portion 422. The parallel portion 421 is disposed near the air outlet and is parallel to the axis of the air outlet, used to adjust the airflow input from the inclined air-cutting portion to be as close as possible to the axis of the air outlet. The airflow blows outward in parallel directions, which helps to increase the blowing distance and thus improve the effective utilization rate of the airflow. The inclined air-cutting part 422 is set near the air inlet. The inclined air-cutting part 422 is set off from the plane where the parallel part 421 is located. Its extension surface intersects the axis of the drive fan blade assembly 5. The lower part of the air duct shell 4 extends downward to form a handle front shell 45. A handle rear shell 9 is installed on the rear side of the handle front shell 45. A cavity is formed between the handle front shell 45 and the handle rear shell 9. A circuit board assembly 7 and a battery 8 are installed in the cavity. The battery 8 is electrically connected to the circuit board assembly 7. A wind-concentrating hood 1 is provided at the air outlet. The inner diameter of the wind-concentrating hood 1 gradually decreases from the air inlet to the air outlet. The wind-concentrating hood 1 not only has the effect of concentrating and pressurizing the air, but also can reduce turbulence and noise by compressing the air jet.

[0026] The inclined air-cutting section 422 is a curved surface, and the extended surface of the curved surface intersects with the axis of the drive fan blade assembly 5. The inner surface of the curved surface is the air-receiving surface 423. The drive fan blade assembly 5 includes a rotating base and drive blades evenly arranged on the outer peripheral wall of the rotating base. The surface of the drive blade facing the air outlet is the drive surface 51. The air-receiving surface 423 intersects with the curved surface of the drive surface 51, and the air-receiving surface 423 and the drive surface 51 form an angle of less than 90°. The air-receiving surface 423 and the drive surface 51 form an acute angle facing each other, which can achieve the effect of airflow pressurization. When the angle between the air-receiving surface 423 and the central axis of the drive fan blade assembly 5 is between 30° and 60°, the comprehensive parameter test is optimal.

[0027] The motor base 41 is provided with an electrical cavity 43 on the side facing the air outlet. The electrical cavity 43 can be used to load a functional module. The opening of the electrical cavity 43 is covered with an encapsulation cover 2. For example, a semiconductor cooling module can be loaded to realize the cold compress care function. When using this technical solution, the encapsulation cover 2 is replaced with an aluminum alloy cover with heat conduction function.

[0028] The outer peripheral wall of the motor base 41 includes a pressure-boosting surface 44 that at least partially increases radially from the air inlet to the air outlet.

[0029] The circuit board assembly 7 is electrically connected to a display screen 3, which is located in a pre-set through hole in the front shell 45 of the handle. A light-transmitting cover is installed on the outside of the through hole, and the display content of the display screen 3 is displayed outward through the light-transmitting cover. The display screen 3 is used to display the working mode of the fan and the remaining charge of the battery 8. The circuit board assembly 7 is electrically connected to a control button 71 and a USB interface 72. The control button 71 is located in a pre-set through hole in the front shell 45 of the handle and is connected to the button panel. The USB interface 72 is located in a pre-set through hole in the rear shell 9 of the handle and extends outward from the through hole. The control button 71 is used to adjust the working mode and working status of the fan blade assembly 5. When the USB interface 72 is connected to an external power source using a charging cable, it can charge the battery 8 to replenish its charge.

[0030] The air inlet is covered with an air inlet cover 6, which is a perforated cover.

[0031] In summary, this utility model achieves pressurization and acceleration, turbulence elimination, and noise reduction in the airflow through the combined action of the drive fan blade assembly 5, the guide vane 42, the pressurizing surface 44, and the wind-gathering cover 1 before blowing it outward. This not only significantly increases the wind speed and air delivery distance but also achieves the effect of quiet operation and noise reduction.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-speed concentrating handheld fan, comprising a duct housing (4), wherein a duct is provided inside the duct housing (4), a motor base (41) is provided at the axis of the duct, a drive fan blade assembly (5) is mounted on the motor base (41), an air inlet and an air outlet are respectively provided at both ends of the duct, the duct is connected to the air inlet and the air outlet, the drive fan blade assembly (5) guides the air located at the air inlet into the duct and blows it outward from the air outlet, and a portion of the circumferential wall of the motor base (41) extends radially outward to form guide vanes (42), characterized in that: The air guide blade (42) is located on the side of the air expelling fan blade group (5) facing the air outlet, the air guide blade (42) comprises a parallel part (421) and an inclined air cutting part (422), the parallel part (421) is arranged near the side of the air outlet, the parallel part (421) is arranged in parallel with the axis of the air outlet, the inclined air cutting part (422) is arranged near the side of the air inlet, the inclined air cutting part (422) is arranged to deviate from the plane where the parallel part (421) is arranged, and the extension surface of the inclined air cutting part (422) is arranged to axially intersect the air expelling fan blade group (5), the lower part of the air duct shell (4) is extended downward to form a handle front shell (45), a handle rear shell (9) is arranged on the rear side of the handle front shell (45), a cavity is formed between the handle front shell (45) and the handle rear shell (9), a circuit board assembly (7) and a battery (8) are arranged in the cavity, and the battery (8) is electrically connected with the circuit board assembly (7).

2. A high speed hand held air fan as claimed in claim 1 wherein: The inclined air cutting part (422) is a curved surface, the extension surface of the curved surface where the inclined air cutting part (422) is arranged intersects the axis of the air expelling fan blade group (5), the inner side of the curved surface is a wind receiving surface (423), the air expelling fan blade group (5) comprises a rotating seat and air expelling blades uniformly arranged on the outer peripheral wall surface of the rotating seat, the surface of the air expelling blades on the side facing the air outlet is an air expelling surface (51), the wind receiving surface (423) is arranged to intersect the curved surface where the air expelling surface (51) is arranged, and an included angle between the wind receiving surface (423) and the air expelling surface (51) is less than 90°.

3. A high speed wind concentrating handheld fan as claimed in claim 2 wherein: The included angle between the wind receiving surface (423) and the central axis of the air expelling fan blade group (5) is between 30° and 60°.

4. A high speed wind collecting hand fan as claimed in claim 1 wherein: The motor base (41) is provided with an electrical cavity (43) on the side facing the air outlet, the electrical cavity (43) can be used to load a functional module, and a packaging cover (2) is arranged on the cavity opening of the electrical cavity (43).

5. A high speed wind concentrating handheld fan as claimed in claim 4 wherein: The circuit board assembly (7) is electrically connected with a display screen (3), the display screen (3) is arranged in a predetermined through hole of the handle front shell (45), a light transmission cover is arranged on the outer side of the through hole, and the display content of the display screen (3) is displayed outward through the light transmission cover.

6. A high speed wind collecting hand fan as claimed in claim 1 wherein: The outer peripheral wall surface of the motor base (41) comprises a pressure increasing surface (44) which is at least partly radially increased from the air inlet to the air outlet.

7. A high speed wind collecting hand fan as claimed in claim 1 wherein: An air collecting cover (1) is arranged at the air outlet, and the inner diameter of the air collecting cover (1) is gradually reduced from the air inlet to the air outlet.

8. A high speed wind collecting hand fan as claimed in claim 1 wherein: The circuit board assembly (7) is electrically connected with a control button (71) and a USB interface (72), the control button (71) is arranged in a predetermined through hole of the handle front shell (45) and connected with a button panel, and the USB interface (72) is arranged in a predetermined through hole of the handle rear shell (9) and extends outward from the through hole.

9. A high speed wind collecting hand fan as claimed in claim 1 wherein: An air inlet cover (6) is arranged at the air inlet, and the air inlet cover (6) is a hollow cover.

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