Silent high-speed fan

Abstract

A silent high-speed fan, comprising a housing. An air duct is formed on the housing; both ends of the air duct are respectively an air inlet and an air outlet; the air duct is internally provided with a pressure boost mechanism; and a rectifier mechanism is provided at the air outlet. The rectifier mechanism comprises a converging shroud provided at the air outlet and a rectifier vane set consisting of a plurality of rectifier vanes that are coaxially arranged in a ring-shaped array on the inner side of the converging shroud; the inner diameter of the converging shroud radially decreases from the end facing the air duct towards the end away from the air duct; each rectifier vane comprise an air discharge rectifier plate and an air-gathering rectifier plate, the air-gathering rectifier plate being connected to the end of the air discharge rectifier plate close to the inner wall of the converging shroud and extending towards the side edge of the converging shroud away from the air outlet of the air duct; and each of the air discharge rectifier plates and the air-gathering rectifier plates is arranged parallel to the central axis of the converging shroud. The present utility model removes turbulence step by step via meticulous control during airflow processes, so as to eliminate the generation of the turbulence at the source, thereby achieving a silent and high-speed airflow effect.

Description

A silent high-speed fan Technical Field

[0001] This utility model relates to the field of fan technology, specifically to a silent high-speed 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 silent high-speed fan that eliminates turbulence step by step during the airflow process by controlling the details, thereby eliminating turbulence at its source and achieving the effect of silent high-speed blowing, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a silent high-speed fan, including a housing, on which an air duct is formed. The air duct has an air inlet and an air outlet at its two ends. A pressurization mechanism is provided inside the air duct. The pressurization mechanism drives air located at the air inlet to flow through the air duct and then blow it out at high speed from the air outlet. A rectifier mechanism is provided at the air outlet. The rectifier mechanism includes a constriction mask covering the air outlet and a rectifier blade group consisting of multiple rectifier blades arranged coaxially in a circular array inside the constriction mask. Both ends of the mask are open. The inner diameter of the mask is radially reduced from the end facing the air duct to the end away from the air duct. The rectifier blades include an outlet rectifier plate and a concentrating rectifier plate. The outlet rectifier plate is located near the air duct. The concentrating rectifier plate is connected to the end of the outlet rectifier plate near the inner wall of the mask and extends towards the edge of the mask away from the air duct. The edge of the concentrating rectifier plate near the inner wall of the mask is tightly connected to the inner wall of the mask. Both the outlet rectifier plate and the concentrating rectifier plate are arranged parallel to the central axis of the mask.

[0006] Preferably, the width h of the air outlet rectifier plate is not less than 3mm.

[0007] Preferably, the edge of the air outlet rectifier plate facing the pressurization mechanism is the first air-cutting edge, and the first air-cutting edge is an acute-angled edge.

[0008] Preferably, the rectifier blade assembly is connected in the middle to a first accommodating cavity, a digital display screen assembly is installed in the first accommodating cavity, and a transparent mask is provided on the outside of the digital display screen assembly.

[0009] Preferably, a first accommodating cavity is connected in the middle of the rectifier blade assembly, a hot and cold semiconductor chip is installed in the first accommodating cavity, a conductive mask is provided on the side of the first accommodating cavity away from the pressurizing mechanism, a through hole is opened on the side of the first accommodating cavity near the pressurizing mechanism, a heat dissipation component is provided on the side of the through hole facing the pressurizing mechanism, the cooling end of the hot and cold semiconductor chip is thermally connected to the conductive mask, and the heating end of the hot and cold semiconductor chip is thermally connected to the heat dissipation component.

[0010] Preferably, the pressurization mechanism includes a drive fan blade assembly and a group of cutter blades arranged coaxially in a ring array on the side of the drive fan blade assembly facing the rectifier mechanism. The drive fan blade assembly includes multiple drive blades arranged circumferentially around the drive fan blade assembly. The surface of the cutter blade facing the outside of the air outlet is the wind-receiving surface, and the surface of the drive blade facing the cutter blade is the wind-driving surface. During the rotation of the drive fan blade assembly, the curved surface of the wind-receiving surface and the curved surface of the wind-driving surface in the same radial region intersect, and the included angle θ1 between the wind-receiving surface and the wind-driving surface is less than 90°.

[0011] Preferably, the included angle θ2 between the wind-receiving surface and the central axis of the drive fan blade assembly satisfies: 30° < θ2 < 60°.

[0012] Preferably, the edge of the wind-cutting blade facing the drive fan blade assembly is a second wind-cutting edge, and the second wind-cutting edge is an acute-angled edge.

[0013] Preferably, the housing includes a front shell and a rear shell that are connected to each other. After the front shell and the rear shell are connected, the upper end forms the air duct, and the lower end forms a second accommodating cavity. The second accommodating cavity is provided with a circuit board assembly and a battery. The circuit board assembly and the battery are electrically connected. An air inlet cover is installed at the air inlet of the air duct.

[0014] Preferably, the circuit board assembly is electrically connected to a control button and a USB interface, both of which are located in a pre-set through hole in the housing and extend outward from the through hole.

[0015] Preferably, a lanyard hole is provided at the lower corner of the housing.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention features a pressurizing mechanism that initially increases the pressure and speed of the airflow, and a rectifier mechanism that guides the high-speed airflow to concentrate it as much as possible in a direction parallel to the axis of the retractable mask. This improves the utilization rate of the airflow and also provides a secondary pressurizing and speed-up, significantly increasing the wind speed and delivery distance. Furthermore, by carefully controlling details such as setting the first and second cutting edges to acute angles and ensuring proper coordination between the rectifier blades and the retractable mask structure, turbulence is eliminated step by step, thus eliminating turbulence at its source and achieving a quiet, high-speed blowing effect. Attached Figure Description

[0018] Figure 1 is an exploded view of an embodiment of the present invention with a digital display screen component;

[0019] Figure 2 is a schematic diagram of the blowing shape of this utility model;

[0020] Figure 3 is an exploded view of the structure of an embodiment of the present invention with a hot and cold semiconductor sheet;

[0021] Figure 4 is a schematic diagram of the front shell structure of this utility model;

[0022] Figure 5 is a schematic diagram of the rear shell structure of this utility model;

[0023] Figure 6 is a schematic diagram of the cross-sectional orientation of the front shell AA of this utility model;

[0024] Figure 7 is a cross-sectional view of the front shell AA of this utility model;

[0025] Figure 8 is a schematic diagram of the rectifier blade structure of this utility model.

[0026] In the diagram: 1. Transparent face mask; 11. Conductive face mask; 2. Digital display screen assembly; 21. Hot and cold semiconductor chip; 22. Heat dissipation assembly; 3. Front shell; 31. Shrink mask; 32. Rectifier blade; 321. Air outlet rectifier plate; 322. Air concentrator rectifier plate; 323. First air cutting edge; 33. First accommodating cavity; 4. Drive fan blade assembly; 41. Drive blade; 411. Drive surface; 5. Circuit board assembly; 6. Battery; 7. Rear shell; 71. Air cutting blade; 711. Air receiving surface; 712. Second air cutting edge; 72. Air duct; 73. Hanging hole; 8. Air inlet cover; 9. High-speed airflow. Detailed Implementation

[0027] 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.

[0028] Please refer to Figures 1-8. A silent high-speed fan includes a housing with an air duct 72 formed thereon. The air duct 72 has an air inlet and an air outlet at its two ends. A pressurization mechanism is disposed within the air duct 72. The pressurization mechanism drives air located at the air inlet to flow through the air duct 72 and then blow it out at high speed from the air outlet. A rectifier mechanism is disposed at the air outlet. The rectifier mechanism includes a shrink-fit mask 31 covering the air outlet and a rectifier blade group consisting of multiple rectifier blades 32 arranged coaxially in a circular array inside the shrink-fit mask 31. Both ends of the shrink-fit mask 31 are open. The inner diameter of the shrink-fit mask 31 radially decreases from the end facing the air duct 72 to the end away from the air duct 72. The rectifier blades 32 include... The air rectifier 321 and the air concentrator rectifier 322 are arranged near the air duct 72. The air concentrator rectifier 321 is connected to the end of the air rectifier 321 near the inner wall of the shrink mask 31 and extends towards the edge of the shrink mask 31 away from the air duct 72. The edge of the air concentrator rectifier 322 near the inner wall of the shrink mask 31 is tightly connected to the inner wall of the shrink mask 31. Both the air rectifier 321 and the air concentrator rectifier 322 are arranged parallel to the central axis of the shrink mask 31. When the high-speed air blown from the pressurization mechanism to the rectifier mechanism reaches the starting end of the shrink mask 31, the first structure it encounters is the air rectifier 321. The air rectifier 321 cuts the high-pressure airflow 9 into multiple high-speed airflows. The high-speed airflow vane enters the compression mask 31, where the inner wall contraction structure further compresses and pressurizes both sides of the vane. During this compression and pressurization process, the high-speed airflow vane generates a certain amount of turbulence due to the sudden pressurization. This turbulence is mainly concentrated near the inner wall of the compression mask 31. Therefore, the air-gathering rectifier plate 322 extends from the outlet rectifier plate 321. Through the clamping action of two adjacent air-gathering rectifier plates 322, the generated turbulence can be further combed and removed, effectively suppressing turbulence. This not only makes the high-speed airflow vane structure more stable, but also prevents the generation of greater noise once the turbulence is suppressed. The edge of the outlet rectifier plate 321 facing the pressurization mechanism is the first air cutter. Edge 323, the first cutting edge 323 is an acute-angled edge. When the high-speed airflow 9 is cut by the air outlet rectifier plate 321, although the turbulence is reduced by setting the first cutting edge 323 to an acute-angled edge, a certain amount of turbulence will still be generated due to the sudden increase in air pressure when the high-speed airflow 9 is cut. In response to this phenomenon, the width h of the air outlet rectifier plate 321 is set to be no less than 3mm. Experimental tests have shown that a distance starting from 3mm can enable a small portable fan to achieve the effect of turbulence reduction. Therefore, through the structure of the above-mentioned rectifier mechanism, not only can the high-speed airflow 9 be pressurized again, but also the generation of excess noise can be effectively overcome, achieving a silent effect.

[0029] In this embodiment, the pressurization mechanism includes a drive fan blade assembly 4 and a group of cutter blades 71 arranged coaxially in a ring array on the side of the drive fan blade assembly 4 facing the rectifier mechanism. The drive fan blade assembly 4 includes multiple drive blades 41 arranged circumferentially around the drive fan blade assembly 4. The surface of the cutter blades 71 facing the outside of the air outlet is the receiving surface 711, and the surface of the drive blades 41 facing the side of the cutter blades 71 is the driving surface 411. During the rotation of the drive fan blade assembly, the curved surfaces of the receiving surface 711 and the driving surface 411 in the same radial region intersect, and the included angle θ1 between the receiving surface 711 and the driving surface 411 is <90°. When the drive fan blade assembly 4 is working, the air at the air inlet of the air duct is driven by the drive blades 41 and accelerated towards the cutter blade group, passing through the receiving surface 711. Under the compression effect of the angle of the wind-driving surface 411, the airflow is cut and compressed to achieve pressurization. At the same time as pressurization, the flow direction of the airflow also changes under the reflection effect of the wind-receiving surface 711. In order to make the airflow reflected from the wind-receiving surface 711 blow out in a direction parallel to the axis of the compression mask 31 as much as possible to improve the airflow utilization rate, the angle θ2 between the wind-receiving surface 711 and the central axis of the wind-driving fan blade assembly 4 satisfies: 30°<θ2<60°. At the same time, the edge of the wind-cutting blade 71 facing the wind-driving fan blade assembly 4 is the second wind-cutting edge 712. The second wind-cutting edge 712 is an acute edge. Setting the second wind-cutting edge 712 as an acute edge is to make the airflow cutting smooth, thereby reducing the generation of turbulence. As long as the amount of turbulence generated can be effectively suppressed, the airflow utilization rate can be improved, and the noise reduction effect is also better.

[0030] Referring to Figure 1, a first accommodating cavity 33 is connected in the middle of the rectifier blade assembly. A digital display screen assembly 2 is installed in the first accommodating cavity 33. A transparent mask 1 is provided on the outside of the digital display screen assembly 2. The digital display screen assembly 2 is electrically connected to the circuit board assembly 5 and can be used to display the actual data of the fan's working mode and power consumption, so as to realize the function of visually monitoring the working status of the fan.

[0031] Referring to Figure 3, in another embodiment, a first accommodating cavity 33 is connected in the middle of the rectifier blade assembly. A hot and cold semiconductor chip 21 is installed in the first accommodating cavity 33. A conductive mask 11 is provided on the side of the first accommodating cavity 33 away from the pressurizing mechanism. A through hole is opened on the side of the first accommodating cavity 33 near the pressurizing mechanism. A heat dissipation component 22 is provided on the side of the through hole facing the pressurizing mechanism. The cooling end of the hot and cold semiconductor chip 21 is thermally connected to the conductive mask 11, and the heating end of the hot and cold semiconductor chip 21 is thermally connected to the heat dissipation component 22. The hot and cold semiconductor chip 21 is electrically connected to the circuit board assembly 5. The conductive mask 11 is an aluminum alloy shell, and the heat dissipation component 22 is an aluminum alloy component. To enhance its heat dissipation effect, the heat dissipation component 22 is made of aluminum alloy. The heat-generating component 22 extends and diffuses along the contour of the rectifier blade 32. When the hot and cold semiconductor chip 21 is activated by the control button, the hot and cold semiconductor chip 21 generates a cooling effect at the cooling end, so that the conductive mask 11 can be used for cold compress on the human body after cooling. At the same time, the heat generated at the heating end is diffused through the heat dissipation component 22 and carried out by the airflow generated by the pressurization mechanism. Since the conductive mask 11 is relatively concentrated, its cooling sensation is strong when it comes into contact with human skin, and the cold compress effect can be clearly felt. However, since the heat dissipation component 22 has a large heat dissipation area, the heat dissipated per unit area becomes less obvious. Therefore, when it is carried out by the high-speed airflow for heat dissipation, the temperature of the airflow will not increase significantly, thus not affecting the use effect. This is a feasible solution that has been proven by practice.

[0032] The housing includes a front shell 3 and a rear shell 7 that are connected to each other. After the front shell 3 and the rear shell 7 are connected, the upper end forms the air duct 72, and the lower end forms a second accommodating cavity. The second accommodating cavity is equipped with a circuit board assembly 5 and a battery 6. The circuit board assembly 5 and the battery 6 are electrically connected. An air inlet cover 8 is installed at the air inlet of the air duct 72. A lanyard hole 73 is provided at the lower corner of the housing for attaching a lanyard, thereby increasing the portability of the fan. A control button and a USB interface are electrically connected to the circuit board assembly 5. The control button and the USB interface are both located in a pre-set through hole in the housing and extend outward from the through hole. The control button is used to adjust and switch the working mode and on / off state of the fan. By connecting the USB interface to an external power source using a charging cable, the battery 6 can be charged to replenish its power.

[0033] In summary, this invention utilizes a pressurizing mechanism to achieve initial pressurization and acceleration of the airflow, and a rectifier mechanism to guide the high-speed airflow so that it is concentrated and blown out in a direction parallel to the axis of the retractable mask 31. This improves the utilization rate of the airflow and also provides secondary pressurization and acceleration, significantly increasing the wind speed and delivery distance. Furthermore, by carefully controlling details such as setting the first cutting edge 323 and the second cutting edge 712 to acute angles and the structural coordination between the rectifier blade 32 and the retractable mask 31, turbulence is eliminated step by step, thus eliminating turbulence at its source and achieving a quiet, high-speed blowing effect.

[0034] 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.

[0035] 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 silent high-speed fan, comprising a housing, wherein an air duct (72) is formed on the housing, and the two ends of the air duct (72) are an air inlet and an air outlet, respectively, characterized in that: A pressurizing mechanism is provided inside the air duct (72). The pressurizing mechanism drives the air at the air inlet to flow through the air duct (72) and then blow it out at high speed from the air outlet. A rectifying mechanism is provided at the air outlet. The rectifying mechanism includes a shrink mask (31) covering the air outlet and a rectifying blade group consisting of multiple rectifying blades (32) arranged coaxially in a ring array inside the shrink mask (31). Both ends of the shrink mask (31) are open. The inner diameter of the shrink mask (31) decreases radially from the end facing the air duct (72) to the end away from the air duct (72). The rectifying blades (32) include... An air outlet rectifier (321) and an air concentrator rectifier (322) are provided. The air outlet rectifier (321) is located near the side of the air duct (72). The air concentrator rectifier (322) is connected to the end of the air outlet rectifier (321) near the inner wall of the shrink mask (31) and extends toward the edge of the shrink mask (31) away from the air duct (72). The edge of the air concentrator rectifier (322) near the inner wall of the shrink mask (31) is tightly connected to the inner wall of the shrink mask (31). Both the air outlet rectifier (321) and the air concentrator rectifier (322) are arranged parallel to the central axis of the shrink mask (31).

2. The silent high-speed fan according to claim 1, characterized in that: The width h of the air outlet rectifier plate (321) is not less than 3mm.

3. A silent high-speed fan according to claim 1 or 2, characterized in that: The edge of the air outlet rectifier plate (321) facing the pressurization mechanism is the first air cutting edge (323), which is an acute-angled edge.

4. A silent high-speed fan according to claim 1, characterized in that: The rectifier blade assembly is connected in the middle by a first accommodating cavity (33), and a digital display screen assembly (2) is installed in the first accommodating cavity (33). A transparent mask (1) is provided on the outside of the digital display screen assembly (2).

5. A silent high-speed fan according to claim 1, characterized in that: The rectifier blade assembly is connected in the middle by a first accommodating cavity (33), in which a hot and cold semiconductor chip (21) is installed. A conductive mask (11) is provided on the side of the first accommodating cavity (33) away from the pressurizing mechanism. A through hole is provided on the side of the first accommodating cavity (33) near the pressurizing mechanism. A heat dissipation component (22) is provided on the side of the through hole facing the pressurizing mechanism. The cooling end of the hot and cold semiconductor chip (21) is thermally connected to the conductive mask (11), and the heating end of the hot and cold semiconductor chip (21) is thermally connected to the heat dissipation component (22).

6. A silent high-speed fan according to claim 1, characterized in that: The pressurization mechanism includes a drive fan blade assembly (4) and a group of cutter blades (71) arranged in a ring array coaxially on the side of the drive fan blade assembly (4) facing the rectifier mechanism. The drive fan blade assembly (4) includes multiple drive blades (41) arranged circumferentially around the drive fan blade assembly (4). The surface of the cutter blade (71) facing the outside of the air outlet is the wind-receiving surface (711), and the surface of the drive blade (41) facing the cutter blade (71) is the wind-driving surface (411). During the rotation of the drive fan blade assembly, the curved surface of the wind-receiving surface (711) and the curved surface of the wind-driving surface (411) in the same radial area intersect, and the included angle θ1 between the wind-receiving surface (711) and the wind-driving surface (411) is <90°.

7. A silent high-speed fan according to claim 6, characterized in that: The included angle θ2 between the wind-receiving surface (711) and the central axis of the drive fan blade assembly (4) satisfies: 30°<θ2<60°.

8. A silent high-speed fan according to claim 6, characterized in that: The edge of the wind-cutting blade (71) facing the drive fan blade assembly (4) is the second wind-cutting edge (712), and the second wind-cutting edge (712) is an acute-angled edge.

9. A silent high-speed fan according to claim 1, characterized in that: The housing includes a front shell (3) and a rear shell (7) that are connected to each other. After the front shell (3) and the rear shell (7) are connected, the upper end forms the air duct (72) and the lower end forms a second accommodating cavity. The second accommodating cavity is provided with a circuit board assembly (5) and a battery (6). The circuit board assembly (5) and the battery (6) are electrically connected. An air inlet cover (8) is installed at the air inlet of the air duct (72). The circuit board assembly (5) is electrically connected with a control button and a USB interface. The control button and the USB interface are both located in a pre-set through hole in the housing and extend outward from the through hole.

10. A silent high-speed fan according to claim 9, characterized in that: A lanyard hole (73) is provided at the lower corner of the shell.

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