WO2022151997A1

WO2022151997A1 - Mute powerful bladeless fan

Info

Publication number: WO2022151997A1
Application number: PCT/CN2021/143697
Authority: WO
Inventors: 洪佳林
Original assignee: 洪佳林
Priority date: 2021-01-16
Filing date: 2021-12-31
Publication date: 2022-07-21
Also published as: CN214465175U

Abstract

A mute powerful bladeless fan, comprising an air guiding member (2). The air guiding member (2) is formed by connecting an air gathering cover (22) and an air outlet cover (21) in a covering mode; through holes (23) which are coaxial are formed in the bottom surfaces of the air gathering cover (22) and the air outlet cover (21), respectively; the edge of the through hole (23) in the bottom surface of the air gathering cover (22) arches inwards in an axial direction so that the connection surface between the edge of the bottom surface of the air gathering cover (22) and the edge of the through hole (23) can form an annular fall slope (221) in smooth transition; the edge of the through hole (23) in the bottom surface of the air outlet cover (21) extends inwards in the axial direction to form a flange (212); an air blocking edge (213) is provided on the periphery of the flange (212) in a circle; air outlets (211) are evenly formed between the flange (212) and the air blocking edge (213); the edge of the through hole (23) of the air gathering cover (22) is in sealed butt joint with the flange (212); the axes of the through holes (23) are deflected to the upper portion of the air guiding member (2), so that an annular air channel (24) having a section gradually reduced from bottom to top is formed in the air guiding member (2); and an air inlet (25) communicated with the air channel (24) is formed in the lower end of the air guiding member (2).

Description

A silent powerful bladeless fan

technical field

The utility model relates to the technical field of fans, in particular to a silent and powerful bladeless fan.

Background technique

A fan refers to a device used to generate wind and cool in hot weather. The electric fan is a device that uses electricity to generate airflow. After the fan inside is energized, it rotates and turns into natural wind to achieve a cooling effect.

The bladeless fan hides the fan blade group inside the fan casing. Because the human eye is blocked by the fan casing, the fan blade group cannot be found intuitively, hence the name. When working, the fan blade group is driven to generate wind flow, and then the wind flow is blown out through the air duct guide in the casing, so as to achieve the effect of blowing and cooling.

The bladeless fan, because the air flow needs to pass through the air duct and then blow out, not only increases the friction with the casing during the flow process, but also reduces the air volume, so compared with the traditional fan under the same air volume, the noise is higher. It is much larger, and the air out of the air outlet is not uniform. The reason for this is that the structure design of the existing bladeless fan body is unreasonable.

Utility model content

The purpose of this utility model is to provide a silent and powerful bladeless fan, through the optimized design of the product structure, the noise during use is greatly reduced, the loss of air volume is small, and the wind can be discharged with a large air volume, so as to solve the problems in the prior art. .

In order to achieve the above purpose, the present utility model provides the following technical solutions: a silent and powerful bladeless fan, comprising an air guide piece, the wind guide piece is formed by the cover and connection of an air gathering hood and an air outlet hood, and the wind gathering hood and The bottom surface of the air outlet hood is respectively provided with coaxial through holes, and the edge of the through hole on the bottom surface of the air collecting hood is axially arched inward to make the connection surface between the bottom surface edge of the air collecting hood and the edge of the through hole form a smooth transition. An annular drop slope, the edge of the through hole on the bottom surface of the air outlet cover extends axially inward to form a flange, the periphery of the flange is provided with a wind-shielding edge, and the flange and the wind-shielding edge are evenly spaced An air outlet is arranged. When the air collecting hood and the air outlet hood are covered and connected, the edge of the through hole of the air collecting hood is sealed with the flange, and the axis of the through hole is biased to be set above the air guide, so as to be in the air guide. An annular air duct whose section is gradually reduced from bottom to top is formed inside the air piece, and an air inlet communicated with the air duct is provided at the lower end of the air guide piece.

Preferably, the air guide is embedded in the through hole of the fan casing, the fan casing includes a front casing and a rear casing, the front casing and the rear casing are covered and connected, and the fan casing is provided with A circuit board assembly and a blower are provided, the circuit board assembly is electrically connected with the blower, and the air outlet of the blower is in butt communication with the air inlet of the air guide.

Preferably, a battery is installed in the fan housing, and the battery is electrically connected to the circuit board assembly.

Preferably, a drive motor is fixedly installed at the lower end of the fan casing, the output shaft of the drive motor is disposed through the fan casing and is fixedly connected to the fan base, and the drive motor is electrically connected to the circuit board assembly.

Preferably, the drive motor is fixedly mounted on the fan housing through a motor fixing member.

Preferably, the fan base includes an upper base shell and a lower base shell that are connected to each other by buckling, and a non-slip pad disposed on the bottom surface of the lower base shell.

Preferably, the circuit board assembly is electrically connected to the setting control switch and the USB interface.

Preferably, a ventilation mesh is provided at the lower end of the fan housing at the position of the blower.

Preferably, a front decorative cover and a rear decorative cover are respectively sandwiched between the front and rear sides of the through hole of the air cover and the air guide member, and both the front decorative cover and the rear decorative cover are open masks.

Compared with the prior art, the utility model has the following beneficial effects:

In the utility model, an annular air duct whose section is gradually reduced from bottom to top is formed inside the air guide, that is, the farther away from the air inlet, the smaller the air duct section is. This structure conforms to the principle of wind pressure attenuation, so that the annular air outlet can be Realize uniform air output, avoid the phenomenon of different air output at different positions of the traditional bladeless fan outlet, and effectively improve the experience of using the product. The air collecting hood adopts a smooth transition annular drop slope, which can gently guide the air flow to the air outlet and collect it, effectively reducing the rigid friction between the inner wall and the air flow, and matching the structural feature of the air duct that the section gradually narrows from bottom to top It avoids the effect of air noise at the top of the air duct, thereby greatly reducing the noise generated by the fan when it is in use. At the same time, the application of a powerful blower can achieve large air volume and low noise output.

Description of drawings

Fig. 1 is a structure exploded diagram one of the present utility model;

Fig. 2 is the structure exploded diagram two of the utility model;

3 is a perspective view of the appearance of the utility model;

Fig. 4 is the structural schematic diagram of the air guide member of the present invention;

Fig. 5 is the first structural schematic diagram of the air outlet hood of the present invention;

Fig. 6 is the second structural schematic diagram of the air outlet hood of the present invention;

Fig. 7 is the structural schematic diagram of the wind collecting hood of the present invention;

8 is a schematic diagram of the cross-sectional position of the air guide of the present invention;

Fig. 9 is the sectional view A-A of the air guide member of the present invention.

In the figure: 1 Fan housing; 11 Front shell; 12 Rear shell; 13 Front decorative cover; 14 Rear decorative cover; 15 Air cover through holes; 16 Ventilation mesh holes; ;212 Flange; 213 Windshield; 22 Wind Gathering Cover; 221 Slope; 23 Through Hole; 24 Air Duct; 25 Air Inlet; 3 Circuit Board Assembly; 31 Control Switch; 32 USB Interface; 4 Blower; 5 Battery; 6 drive motor; 61 motor fixing parts; 7 fan base; 71 base upper shell; 72 base lower shell; 73 non-slip pad.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to FIGS. 1-9 , in the embodiment of the present invention, a silent and powerful bladeless fan includes an air guide member 2 , and the air guide member 2 is formed by covering and connecting an air collecting hood 22 and an air outlet hood 21 . Coaxial through holes 23 are respectively opened on the bottom surfaces of the air collecting hood 22 and the air outlet hood 21, and the edges of the through holes 23 on the bottom surface of the air collecting hood 22 are arched axially inward to make the bottom edge of the air collecting hood 22 and the through holes 23 arched inward. The connecting surface between the edges of the holes 23 forms a smooth transition annular drop slope 221 , the edges of the through holes 23 on the bottom surface of the air outlet hood 21 extend axially inward to form a flange 212 , and the periphery of the flange 212 surrounds a circle A wind shielding edge 213 is provided, and an air outlet 211 is evenly arranged between the flange 212 and the wind shielding edge 212. When the wind collecting hood 22 and the air outlet hood 21 are covered and connected, the wind collecting hood 22 is open to the air. The edge of the hole 23 is sealed with the flange 212, and the through hole 23 is axially biased to be disposed above the air guide 2, so that an annular air duct 24 with a cross-section gradually reduced from bottom to top is formed inside the air guide 2. The air guide The lower end is provided with an air inlet 25 communicated with the air duct 24.

The air guide 2 is embedded in the hood through hole 15 of the fan casing 1. The fan casing 1 includes a front casing 11 and a rear casing 12. The front casing 11 and the rear casing 12 are covered and connected. The fan housing 1 is provided with a circuit board assembly 3 and a blower 4 , the circuit board assembly 3 is electrically connected with the blower 4 , and the air outlet of the blower 4 is in butt communication with the air inlet 24 of the air guide 2 .

A battery 5 is installed in the fan housing 1, and the battery 5 is electrically connected to the circuit board assembly 3. The circuit board assembly 3 is electrically connected to a control switch 31 and a USB interface 32. The fan housing 1 The lower end is fixedly mounted with a drive motor 6 through a motor fixing piece 61 , the output shaft of the drive motor 6 is arranged through the fan housing 1 and is fixedly connected with the fan base 7 , and the drive motor 6 is electrically connected with the circuit board assembly 3 , through the control The switch 31 can turn on and off or switch the working state of the driver 6 and the blower 4 , and the external power supply through the USB interface 32 can charge the battery 5 and supplement the power or provide working power for the circuit.

The fan base 7 includes a base upper shell 71 and a base lower shell 72 that are connected to each other by a snap-fit connection, and a non-slip pad 73 disposed on the bottom surface of the base lower shell 72 .

The lower end of the fan housing 1 is provided with a ventilation mesh 16 at the position of the blower 4 . When the blower 4 is working, the ventilation mesh 16 can draw air from outside the fan housing 1 to generate a blowing air flow.

A front decorative cover 13 and a rear decorative cover 14 are respectively sandwiched between the front and rear sides of the air cover through hole 15 and the air guide 2 , and the front decorative cover 13 and the rear decorative cover 14 are both open masks.

To sum up, in the present utility model, an annular air duct 24 whose section is gradually reduced from bottom to top is formed inside the air guide 2, that is, the further away from the air inlet 25, the smaller the cross section of the air duct 24, and this structure conforms to the principle of wind pressure attenuation. , so that the annular air outlet 211 can achieve uniform air discharge everywhere, avoiding the phenomenon of different air outlets at different positions of the traditional bladeless fan air outlet, and effectively improving the experience of using the product. The air collecting hood 22 adopts a smooth transition annular drop slope 221, which can gently guide the air flow to the air outlet 211 and collect it, effectively reducing the rigid friction between the inner wall surface and the air flow, and matching the air duct 24 from bottom to top. The reduced structure feature avoids the effect of air noise at the top of the air duct 24, thereby greatly reducing the noise generated by the fan in use.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

A silent strong bladeless fan, comprising an air guide (2), characterized in that: the air guide (2) is formed by covering and connecting an air collecting hood (22) and an air outlet hood (21). Coaxial through holes (23) are respectively opened on the bottom surfaces of the air hood (22) and the air outlet hood (21), and the edges of the through holes (23) on the bottom surface of the air collecting hood (22) are arched axially inward to make the A connecting surface between the edge of the bottom surface of the air collecting hood (22) and the edge of the through hole (23) forms a smooth transition annular drop slope (221), and the edge axis of the through hole (23) on the bottom surface of the air outlet hood (21) A protruding edge (212) is formed by extending inwardly, the periphery of the protruding edge (212) is provided with a wind-shielding edge (213) in a circle, and a wind-shielding edge (212) is evenly arranged between the protruding edge (212) and the wind-shielding edge (212). The air outlet (211), when the air collecting hood (22) and the air outlet hood (21) are covered and connected, the edge of the through hole (23) of the air collecting hood (22) is sealed and butted with the flange (212), The through hole (23) is disposed above the air guide member (2) with its axial center biased, so that an annular air duct (24) whose cross section is gradually reduced from bottom to top is formed inside the air guide member (2). The lower end of ) is provided with an air inlet (25) communicated with the air duct (24).
The silent strong bladeless fan according to claim 1, characterized in that: the air guide member (2) is embedded in the through hole (15) of the hood of the fan casing (1), and the fan casing The body (1) comprises a front casing (11) and a rear casing (12), the front casing (11) and the rear casing (12) are covered and connected, and a circuit board assembly (3) is arranged in the fan casing (1). ) and a blower (4), the circuit board assembly (3) is electrically connected with the blower (4), and the air outlet of the blower (4) is in butt communication with the air inlet (24) of the air guide (2).
A silent and powerful bladeless fan according to claim 2, characterized in that: a battery (5) is installed in the fan housing (1), and the battery (5) is electrically connected to the circuit board assembly (3). connect.
A silent and powerful bladeless fan according to claim 2, characterized in that: a drive motor (6) is fixedly installed at the lower end of the fan casing (1), and the output shaft of the drive motor (6) penetrates through the fan casing (1) is arranged and fixedly connected to the fan base (7), and the drive motor (6) is electrically connected to the circuit board assembly (3).
The silent strong bladeless fan according to claim 4, characterized in that: the drive motor (6) is fixedly mounted on the fan housing (1) through a motor fixing member (61).
A silent and powerful bladeless fan according to claim 4, characterized in that: the fan base (7) comprises an upper base shell (71) and a lower base shell (72) that are snap-connected to each other; Anti-skid pads (73) on the bottom surface of the lower shell (72).
The silent powerful bladeless fan according to any one of claims 2, 3, and 4, characterized in that: the circuit board assembly (3) is electrically connected to the setting control switch (31) and the USB interface (32) .
The silent strong bladeless fan according to claim 2, characterized in that: the lower end of the fan casing (1) is provided with a ventilation mesh (16) at the position of the blower (4).
The silent powerful bladeless fan according to claim 2, characterized in that: a front decorative cover (13) and a front decorative cover (13) and a front decorative cover (13) and a front decorative cover (13) and a front decorative cover (13) and an air guide (2) are respectively sandwiched between the front and rear sides of the air cover through hole (15) and the air guide (2). A rear decorative cover (14), the front decorative cover (13) and the rear decorative cover (14) are both open masks.