Silent high-speed fan

Abstract

The utility model discloses a mute high-speed fan which comprises a shell, an air channel is formed in the shell, an air inlet and an air outlet are formed in the two ends of the air channel respectively, a pressurizing mechanism is arranged in the air channel, and a rectifying mechanism is arranged at the air outlet. The rectifying mechanism comprises a necking cover arranged at the air outlet in a covering mode and a rectifying blade set formed by coaxially arranging a plurality of rectifying blades on the inner side of the necking cover in an annular array mode, the inner diameter of the necking cover is reduced in the radial direction from the end facing the air channel to the end away from the air channel, and the rectifying blades comprise air outlet rectifying plates and air gathering rectifying plates. The air gathering rectifying plate is connected to the end, close to the inner wall of the necking cover, of the air outlet rectifying plate and extends towards the edge of the side, away from the air outlet of the air duct, of the necking cover, and the air outlet rectifying plate and the air gathering rectifying plate are both parallel to the central axis of the necking cover. And turbulent flow is eliminated from a source, so that the effect of mute high-speed blowing is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a silent high-speed fan. Background Art

[0002] When going out or doing outdoor activities in the summer, the weather is relatively hot and there may be no air conditioning. In order to keep cool at any time, portable fans came into being. They are popular because they are easy to carry and can be used at any time.

[0003] However, due to its small size, the electrical components equipped with it can only use relatively small power. Therefore, in previous portable fans, it is impossible to design the wind force to be very large, which also leads to poor wind blowing and cooling effect. Although some manufacturers have applied the structure of traditional booster fans to such small portable fans to increase the wind speed to increase the cooling effect, such as the Chinese patent (authorization announcement number: CN217029352U), it does not take into account the problem of wind turbulence, resulting in very loud noise when it is working, which seriously affects the consumer's user experience and is not conducive to the popularization and application of the product. Utility Model Content

[0004] The purpose of the utility model is to provide a silent high-speed fan, which can control the details during the airflow process, eliminate turbulence in steps, and eliminate turbulence at the source, thereby achieving the effect of silent high-speed blowing and solving the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a silent high-speed fan, comprising a shell, an air duct is formed on the shell, the two ends of the air duct are respectively an air inlet and an air outlet, a supercharging mechanism is arranged in the air duct, the supercharging mechanism drives the air at the air inlet to flow through the air duct and then blow out from the air outlet at high speed, a rectifying mechanism is arranged at the air outlet, the rectifying mechanism comprises a shrinking cover arranged at the air outlet and a rectifying blade group composed of a plurality of rectifying blades coaxially arranged in an annular array on the inner side of the shrinking cover, the shrinking cover Both ends of the cover are openings, and the inner diameter of the shrinkage cover radially decreases from one end toward the end away from the air duct, and the rectifying blades include an air outlet rectifying plate and an air gathering rectifying plate, and the air outlet rectifying plate is arranged close to one side of the air duct, and the air gathering rectifying plate is connected to the end of the air outlet rectifying plate close to the inner wall of the shrinkage cover, and extends toward the edge of the shrinkage cover away from the air duct, and the edge of the air gathering rectifying plate close to the inner wall of the shrinkage cover is tightly connected to the inner wall of the shrinkage cover, and the air outlet rectifying plate and the air gathering rectifying plate are both arranged parallel to the central axis of the shrinkage cover.

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

[0007] Preferably, the edge of the air outlet rectifying plate facing the supercharging mechanism is a first wind cutting edge, and the first wind cutting edge is an acute-angle edge.

[0008] Preferably, a first accommodating cavity is connected in the middle of the rectifying blade group, a digital display screen assembly is installed in the first accommodating cavity, and a transparent mask is provided on the outer side of the digital display screen assembly.

[0009] Preferably, a first accommodating chamber is connected in the middle of the rectifying blade group, a hot and cold semiconductor sheet is installed in the first accommodating chamber, a side of the first accommodating chamber away from the boosting mechanism is covered with a conduction mask, a side of the first accommodating chamber close to the boosting mechanism is provided with a through hole, a heat dissipation component is provided on the side of the through hole facing the boosting mechanism, the cooling end of the hot and cold semiconductor sheet is thermally connected to the conduction mask, and the heating end of the hot and cold semiconductor sheet is thermally connected to the heat dissipation component.

[0010] Preferably, the boost mechanism includes a drive fan blade assembly and a wind cutting blade group composed of multiple wind cutting blades coaxially arranged in a circular array on the side of the drive fan blade assembly facing the rectification mechanism. The drive fan blade assembly includes multiple wind driving blades circumferentially arranged around the drive fan blade assembly, the surface of the wind cutting blade facing the outside of the air outlet is the wind receiving surface, and the surface of the wind driving blade facing the side of the wind cutting blade is the wind driving surface. During the rotation of the drive fan blade assembly, the curved surface where the wind receiving surface and the curved surface where the wind driving surface are located in the same radial region are intersected, and the angle θ1 between the wind receiving surface and the wind driving surface is <90°.

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

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

[0013] Preferably, the shell includes a front shell and a rear shell which are covered and connected to each other, the upper end of the front shell and the rear shell are covered and connected to form the air duct, and the lower end forms a second accommodating cavity, a circuit board assembly and a battery are arranged in the second accommodating cavity, the circuit board assembly and the battery are electrically connected, and the air inlet of the air duct is covered with an air inlet cover.

[0014] Preferably, the circuit board assembly is electrically connected with a control button and a USB interface, and the control button and the USB interface are both arranged in a through hole preset in the shell and extend outward from the through hole.

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

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

[0017] The utility model has a boosting mechanism that realizes the first boosting and speeding up of the wind flow, and a rectifying mechanism that realizes the diversion of the high-speed wind flow so that the wind flow can be concentratedly blown out in a direction parallel to the axis of the shrinkage cover as much as possible, thereby improving the utilization rate of the wind flow and also performing a secondary boosting and speeding up, greatly improving the wind speed and the air supply distance, and in the wind flow stroke, by setting the first wind cutting edge and the second wind cutting edge as acute-angle edges, and controlling details such as the coordination of the rectifying blades and the shrinkage cover structure, turbulence is eliminated step by step, and turbulence is eliminated at the source, thereby achieving the effect of silent and high-speed blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded diagram of the structure of an embodiment of the digital display screen assembly of the utility model;

[0019] Figure 2 This is a schematic diagram of the blowing form of the utility model;

[0020] Figure 3 An exploded diagram of the structure of an embodiment of the utility model in which a cold and hot semiconductor sheet is arranged;

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

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

[0023] Figure 6 This is a schematic diagram of the AA section of the front shell of the utility model;

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

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

[0026] In the figure: 1 a perspective mask; 11 a conductive mask; 2 a digital display screen assembly; 21 a hot and cold semiconductor chip; 22 a heat dissipation assembly; 3 a front shell; 31 a shrink cover; 32 a rectifying blade; 321 an air outlet rectifying plate; 322 an air collecting rectifying plate; 323 a first wind cutting edge; 33 a first accommodating chamber; 4 a drive fan blade assembly; 41 a drive blade; 411 a drive surface; 5 a circuit board assembly; 6 a battery; 7 a rear shell; 71 a drive blade; 711 a wind receiving surface; 712 a second wind cutting edge; 72 an air duct; 73 a hanging rope hole; 8 an air inlet cover; 9 a high-speed air flow. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-8A silent high-speed fan comprises a shell, an air duct 72 is formed on the shell, and the two ends of the air duct 72 are respectively an air inlet and an air outlet, a supercharging mechanism is arranged in the air duct 72, and the supercharging mechanism drives the air at the air inlet to flow through the air duct 72 and then blow out from the air outlet at a high speed, and a rectifying mechanism is arranged at the air outlet, and the rectifying mechanism comprises a shrinking cover 31 arranged at the air outlet and a rectifying blade group composed of a plurality of rectifying blades 32 coaxially arranged in an annular array on the inner side of the shrinking cover 31, both ends of the shrinking cover 31 are openings, and the inner diameter of the shrinking cover 31 radially decreases from one end toward the air duct 72 to the end away from the air duct 72, and the rectifying blade 32 comprises an air outlet rectifying plate 3 21 and the wind gathering rectifying plate 322, the air outlet rectifying plate 321 is arranged near one side of the air duct 72, the wind gathering rectifying plate 322 is connected to one end of the air outlet rectifying plate 321 near the inner wall of the shrinkage cover 31, and extends towards the edge of the shrinkage cover 31 away from the air duct 72, the edge of the air gathering rectifying plate 322 near the inner wall of the shrinkage cover 31 is tightly connected to the inner wall of the shrinkage cover 31, the air outlet rectifying plate 321 and the air gathering rectifying plate 322 are both arranged parallel to the central axis of the shrinkage cover 31, and the high-speed wind blowing from the boosting mechanism to the rectifying mechanism first encounters the structure of the air outlet rectifying plate 321 when reaching the starting end of the shrinkage cover 31, and the air outlet rectifying plate 321 cuts the high-pressure airflow 9 into multiple high-speed airflow sheets entering The shrinkage cover 31 further compresses and pressurizes the two sides of the high-speed air flow sheet through the structure of the inner wall contraction. During the compression and pressurization process, the high-speed air flow sheet will produce a certain amount of turbulence effect due to the sudden pressurization. The turbulence effect is mainly concentrated near the inner wall surface of the shrinkage cover 31. Therefore, the wind collecting straightening plate 322 is extended on the basis of the air outlet straightening plate 321. Through the clamping effect of the two adjacent wind collecting straightening plates 322, the generated turbulence can be combed and removed again, which effectively suppresses the turbulence, not only making the high-speed air flow sheet structure more stable, but also preventing the generation of greater noise once the generation of turbulence is suppressed. The edge of the air outlet straightening plate 321 facing the supercharging mechanism is the first wind cutting edge 3 23, the first cutting wind edge 323 is an acute-angle edge. When the high-speed wind flow 9 is cut by the air outlet rectifying plate 321, although the turbulence is reduced by setting the first cutting wind edge 323 as an acute-angle edge, a certain amount of turbulence will be generated due to the sudden increase in wind pressure when the high-speed wind flow 9 is cut. In view of this phenomenon, the width h of the air outlet rectifying plate 321 is set to be not less than 3mm. Experimental tests have shown that a starting distance of 3mm can enable a smaller portable fan to achieve the effect of combing out turbulence. Therefore, through the coordination of the structure of the above-mentioned rectifying mechanism, not only can the high-speed wind flow 9 have the effect of re-pressurization, but also the generation of excess noise can be effectively overcome to achieve a silent effect.

[0029] In the present embodiment, the boost mechanism includes a drive fan blade assembly 4 and a wind cutting blade group composed of a plurality of wind cutting blades 71 coaxially arranged in a circular array on the side of the drive fan blade assembly 4 facing the rectification mechanism. The drive fan blade assembly 4 includes a plurality of wind driving blades 41 circumferentially arranged around the drive fan blade assembly 4. The surface of the wind cutting blade 71 facing the outside of the air outlet is a wind receiving surface 711. The surface of the wind driving blade 41 facing the side of the wind cutting blade 71 is a wind driving surface 411. During the rotation of the drive fan blade assembly, the curved surface where the wind receiving surface 711 and the curved surface where the wind driving surface 411 are located in the same radial area are intersected, and the angle θ1 between the wind receiving surface 711 and the wind driving surface 411 is less than 90°. When the drive fan blade assembly 4 is working, the air at the air inlet of the air duct is driven by the wind driving blades 41 and then blown toward the wind cutting blade group at an accelerated speed. 11 and the wind-driving surface 411 are compressed at an angle, and the wind flow is cut and compressed to achieve supercharging. While supercharging, the flow direction of the wind flow is also reversed under the reflection of the wind receiving surface 711. In order to make the wind flow reflected from the wind receiving surface 711 blow out in a direction parallel to the axis of the shrink cover 31 as much as possible to improve the wind flow 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 side of the wind-driving fan blade assembly 4 is a second wind-cutting edge 712, and the second wind-cutting edge 712 is an acute-angle edge. The second wind-cutting edge 712 is set as an acute-angle edge to make the wind flow cutting column smooth, thereby reducing the generation of turbulence. As long as the amount of turbulence generated can be effectively suppressed, the utilization rate of the wind flow can be improved, and the noise reduction effect is also better.

[0030] See also Figure 1 A first accommodating cavity 33 is connected in the middle of the rectifying blade group, and a digital display screen assembly 2 is installed in the first accommodating cavity 33. The outer cover of the digital display screen assembly 2 is provided with a transparent mask 1. 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, thereby realizing the function of visually monitoring the fan's working status.

[0031] See also Figure 3In another embodiment, a first accommodating chamber 33 is connected in the middle of the rectifying blade group, a hot and cold semiconductor sheet 21 is installed in the first accommodating chamber 33, a conductive mask 11 is provided on the side of the first accommodating chamber 33 away from the supercharging mechanism, a through hole is provided on the side of the first accommodating chamber 33 close to the supercharging mechanism, a heat dissipation component 22 is provided on the side of the through hole facing the supercharging mechanism, a cooling end of the hot and cold semiconductor sheet 21 is thermally connected to the conductive mask 11, a heating end of the hot and cold semiconductor sheet 21 is thermally connected to the heat dissipation component 22, the hot and cold semiconductor sheet 21 is electrically connected to the circuit board component 5, the conductive mask 11 is an aluminum alloy shell, the heat dissipation component 22 is an aluminum alloy component, and in order to enhance its heat dissipation effect, the heat dissipation component The component 22 extends and diffuses along the contour of the rectifying blade 32. When the hot and cold semiconductor sheet 21 is started to work by the control button, the hot and cold semiconductor sheet 21 produces a cooling effect at the cooling end, so that the conductive mask 11 can be used for human body cold compress after cooling. At the same time, the heat generated at the heating end is diffused through the heat dissipation component 22 and then carried out and dissipated by the wind flow generated by the boost mechanism. Since the conductive mask 11 is relatively concentrated, when it contacts the human skin, the cooling sensation is stronger and the cold compress effect can be clearly felt. Since the heat dissipation area of ​​the heat dissipation component 22 is large, the heat dissipated per unit area becomes unobvious. Therefore, when the heat is carried out by the high-speed wind flow for heat dissipation, the temperature of the wind flow will not be significantly increased, thereby not affecting the use effect. This is a feasible solution confirmed by practice.

[0032] The shell includes a front shell 3 and a rear shell 7 which are covered and connected to each other. The front shell 3 and the rear shell 7 are covered and connected to form the air duct 72 at the upper end, and a second accommodating chamber is formed at the lower end. A circuit board assembly 5 and a battery 6 are arranged in the second accommodating chamber. The circuit board assembly 5 and the battery 6 are electrically connected. The air inlet of the air duct 72 is covered with an air inlet cover 8. A lanyard hole 73 is arranged at the corner of the lower end of the shell. The lanyard hole 73 is used to tie a lanyard, thereby increasing the carrying scenario of the fan. A control button and a USB interface are electrically connected on the circuit board assembly 5. The control button and the USB interface are both arranged in a preset through hole of the shell and extend outward from the through hole. The control button is used to adjust and switch the working mode and the opening and closing state of the fan. The USB interface and the external power supply are connected by a charging cable to charge the battery 6 to supplement the power of the battery 6.

[0033] To sum up: In the utility model, the boosting mechanism realizes the first boosting and speeding up of the wind flow, and the rectifying mechanism realizes the guidance of the high-speed wind flow so that the wind flow can be blown out in a concentrated direction parallel to the axis of the shrinkage cover 31 as much as possible, thereby improving the utilization rate of the wind flow and performing secondary boosting and speeding up at the same time, greatly improving the wind speed and the air supply distance, and in the wind flow stroke, by setting the first cutting wind edge 323 and the second cutting wind edge 712 as acute-angle edges, and controlling the details such as the structural coordination of the rectifying blade 32 and the shrinkage cover 31, the turbulence is eliminated in steps, and the turbulence is eliminated at the source, thereby achieving the effect of silent and high-speed blowing.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention 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 respectively an air inlet and an air outlet, wherein: A boost mechanism is provided in the air duct (72), and the boost mechanism drives the air at the air inlet to flow through the air duct (72) and then blow out from the air outlet at a high speed. A rectifying mechanism is provided at the air outlet, and the rectifying mechanism comprises a shrinking cover (31) provided at the air outlet and a rectifying blade group composed of a plurality of rectifying blades (32) coaxially arranged in an annular array on the inner side of the shrinking cover (31). Both ends of the shrinking cover (31) are open, and the inner diameter of the shrinking cover (31) radially decreases from one end toward the air duct (72) to one end away from the air duct (72). The rectifying blades (32) comprise An air outlet rectifying plate (321) and an air gathering rectifying plate (322), wherein the air outlet rectifying plate (321) is arranged close to one side of the air duct (72), and the air gathering rectifying plate (322) is connected to one end of the air outlet rectifying plate (321) close to the inner wall of the shrinkage cover (31), and extends toward the edge of the shrinkage cover (31) away from the air duct (72). The edge of the air gathering rectifying plate (322) close to the inner wall of the shrinkage cover (31) is tightly connected to the inner wall of the shrinkage cover (31), and the air outlet rectifying plate (321) and the air gathering rectifying plate (322) are both arranged parallel to the central axis of the shrinkage cover (31).

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

3. A silent high-speed fan according to claim 1 or 2, characterized in that: The edge of the air outlet rectifying plate (321) facing the supercharging mechanism is a first wind cutting edge (323), and the first wind cutting edge (323) is an acute-angle edge.

4. The silent high-speed fan according to claim 1, characterized in that: A first accommodating chamber (33) is connected in the middle of the rectifying blade group, a digital display screen assembly (2) is installed in the first accommodating chamber (33), and a perspective mask (1) is provided on the outer side of the digital display screen assembly (2).

5. The silent high-speed fan according to claim 1, characterized in that: A first accommodating chamber (33) is connected in the middle of the rectifying blade group, a cold and hot semiconductor sheet (21) is installed in the first accommodating chamber (33), a conductive mask (11) is provided on the side of the first accommodating chamber (33) away from the supercharging mechanism, a through hole is provided on the side of the first accommodating chamber (33) close to the supercharging mechanism, a heat dissipation component (22) is provided on the side of the through hole facing the supercharging mechanism, a cooling end of the cold and hot semiconductor sheet (21) is connected to the conductive mask (11) by thermal conduction, and a heating end of the cold and hot semiconductor sheet (21) is connected to the heat dissipation component (22) by thermal conduction.

6. The silent high-speed fan according to claim 1, characterized in that: The boost mechanism comprises a drive fan blade assembly (4) and a wind cutting blade group composed of a plurality of wind cutting blades (71) coaxially arranged in a ring array on the side of the drive fan blade assembly (4) facing the rectification mechanism. The drive fan blade assembly (4) comprises a plurality of wind driving blades (41) circumferentially arranged around the drive fan blade assembly (4). The surface of the wind cutting blade (71) facing the outside of the air outlet is a wind receiving surface (711), and the surface of the wind driving blade (41) facing the side of the wind cutting blade (71) is a wind driving surface (411). During the rotation of the drive fan blade assembly, the curved surface where the wind receiving surface (711) and the curved surface where the wind driving surface (411) are located in the same radial area are intersected, and the angle θ1 between the wind receiving surface (711) and the wind driving surface (411) is less than 90°.

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

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

9. The silent high-speed fan according to claim 1, characterized in that: The shell comprises a front shell (3) and a rear shell (7) which are connected to each other and cover each other. When the front shell (3) and the rear shell (7) are connected to each other, the upper end forms the air duct (72), and the lower end forms a second accommodating cavity. A circuit board assembly (5) and a battery (6) are arranged in the second accommodating cavity. 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 to a control button and a USB interface. The control button and the USB interface are both arranged in a through hole preset in the shell and extend outward from the through hole.

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

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