WO2021208497A1

WO2021208497A1 - Head assembly, air duct system, and fan

Info

Publication number: WO2021208497A1
Application number: PCT/CN2020/139933
Authority: WO
Inventors: 柳洲; 梁浩; 饶长健; 梁文龙; 黄燕宁; 王孝忱; 雷亚阔
Original assignee: 珠海格力电器股份有限公司
Priority date: 2020-04-16
Filing date: 2020-12-28
Publication date: 2021-10-21
Also published as: CN111396362A

Abstract

A head assembly, an air duct system, and a fan. The head assembly comprises an air outlet duct (1) and air guide plates. The air outlet duct (1) is divided by a plurality of air guide plates into a plurality of air outlet portions. Each air outlet portion has a first wind wall (2) and a second wind wall (3) arranged opposite to each other. The first wind wall (2) comprises a first arc-shaped flow guide surface (21) and a first outflow surface (22) connected to the first arc-shaped flow guide surface (21) in the airflow direction. The second wind wall (3) comprises a second arc-shaped flow guide surface (31) and a second outflow surface (32) connected to the second arc-shaped flow guide surface (31) in the airflow direction. An air outlet gap is formed between the first outflow surface (22) and the second outflow surface (32). Moreover, in an air flow direction, the extension surface of the first arc-shaped flow guide surface (21) intersects the second outflow surface (32), and the extension surface of the second arc-shaped flow guide surface (31) intersects the first outflow surface (22). The head assembly has large air output and strong wind pressure.

Description

Head assembly, air duct system, fan

Technical field

This application relates to the technical field of household appliances, in particular to a head assembly, an air duct system, and a fan.

Background technique

In the bladeless fan in the prior art, the external airflow is sucked into the fan, and the external airflow is transformed into a high-speed rotating airflow through the power system. The air outlet on the wind assembly flows out to the outside.

However, the air outlet assembly generally has two left and right air outlet ducts, and each outlet air duct is surrounded by two oppositely arranged wind wall structures, and the air outlet is a gap reserved at the joint of the two wind walls. Part of the airflow entering the air outlet duct flows along the inner surface of the wind wall. At the air outlet, the airflow on both sides of the wind wall needs to converge toward the air outlet. Due to the large length of the air outlet duct, in order to reduce the loss of the air flow in the air outlet duct, the above-mentioned wind wall structure is generally designed as an arc structure, which has an arc-shaped guide surface. When set relative to each other, the air outlet is located in the middle of the two enclosed areas as described above. When the airflow converges towards the air outlet, part of the airflow will be divided into convection. The convection reduces the air output of the bladeless fan at the same time. It is easy to bring about the problems of noise and weakened user's sense of wind.

Summary of the invention

Therefore, the purpose of this application is to solve the above-mentioned problems, so as to provide a head assembly, air duct system, and fan.

In order to solve the above-mentioned problems, the present application provides a machine head assembly, which includes an air outlet duct and an air deflector. The several air deflectors divide the air duct into a plurality of air outlets. A wind wall and a second wind wall, wherein the first wind wall includes a first arc-shaped diversion surface and a first outlet surface that is connected to the first arc-shaped diversion surface along the airflow direction; the second wind wall includes The second arc-shaped guide surface and the second outlet surface that is connected to the second arc-shaped guide surface along the direction of the airflow; an outlet gap is formed between the first outlet surface and the second outlet surface, and flows along the airflow Direction, the extension surface of the first arc-shaped guide surface meets the second outlet surface, and the extension surface of the second arc-shaped guide surface meets the first outlet surface.

In one embodiment, both the first arc-shaped flow guide surface and the second arc-shaped flow guide surface are configured as circular arc surfaces.

In one embodiment, the first arc-shaped flow guide surface and the second arc-shaped flow guide surface are configured to have different arc radii.

In one embodiment, the first arc-shaped flow guide surface and the second arc-shaped flow guide surface are configured such that the radius of the arc of one of them is at least 4 times that of the other.

In one embodiment, both the first outflow surface and the second outflow surface are configured as flat surfaces.

In one embodiment, the air outlet gap is configured to be 3 mm.

In an embodiment, a first transition flow surface is provided between the first arc-shaped flow guide surface and the first outlet surface, and a second transition flow surface is provided between the second arc-shaped flow guide surface and the second outlet surface.

In one embodiment, the air outlet air duct has a direct current air duct arranged along the height direction of the nose assembly and a first direction-changing flow channel which is connected to the upper end of the direct current air duct along the flow direction of the airflow.

In one embodiment, there is an outlet angle A between the wind outlet direction of the first direction-changing flow channel and the horizontal wind outlet direction, and the wind outlet angle A is greater than or equal to 20 degrees and less than or equal to 40 degrees.

In one embodiment, the air outlet angle A is 30 degrees.

The present application also provides an air duct system, which includes any of the above-mentioned nose components; the air inlet component is arranged under the power device, and the outside air flows into the power device through the air inlet component; the air deflector component is covered in On the power plant, the air outlet end is connected to the air outlet duct.

In one embodiment, the air inlet assembly includes: an air inlet wall, which is annular in shape, on which a number of air inlet structures are arranged; a deflector, which is arranged in the middle of the air inlet wall, and the outside airflow is guided backward through the deflector The power unit; and the collecting cover, which is arranged above the deflector, and the air outlet end is connected to the power unit.

In one embodiment, the collecting shroud is configured to be horn-shaped.

In one embodiment, the flow guide assembly includes: a second direction-changing flow passage, which is provided with a number of direction-changing blades, and the direction-changing blades guide the rotating air flow from the power device into a straight air flow; and the diffusion flow path, which enters The wind end is connected to the second direction-changing flow channel in sequence, and the air outlet end is connected to the air outlet air channel.

In one embodiment, a first diffusion surface and a second diffusion surface are provided at the connection between the diffusion flow channel and the air outlet air channel, and the first diffusion surface and the second diffusion surface are respectively connected to the first wind wall and the second diffusion surface. The second wind wall is connected.

In one embodiment, the first diffusion surface and the second diffusion surface are configured as arc surfaces arranged parallel to each other.

The present application also provides a fan including: any of the above-mentioned head components; or any of the above-mentioned air duct systems.

In one embodiment, the fan is a bladeless fan.

The technical solution of this application has the following advantages:

1. The head assembly in this application includes an air outlet duct and a wind deflector. The several air deflectors divide the air duct into a plurality of air outlets. The air outlets have a first wind wall and a second wind wall arranged opposite to each other. The wind wall, wherein the first wind wall includes a first arc-shaped diversion surface and a first outlet surface that is connected to the first arc-shaped diversion surface along the airflow direction; the second wind wall includes a second arc-shaped diversion surface Surface and the second outflow surface that is connected to the second arc-shaped guide surface along the direction of the airflow; the first outflow surface and the second outflow surface form an air outlet gap, and along the flow direction of the airflow, the first arc-shaped The extension surface of the diversion surface meets the second outlet surface, and the extension surface of the second arc-shaped diversion surface meets the first outlet surface.

The air outlet in the present application can effectively ensure that when the airflow leads to the air outlet gap, it prevents the airflow flowing through the first air wall and the second air wall from converging at the air outlet gap position, thereby reducing the turbulence of the airflow At the same time, it can enhance the collection effect of the airflow on the first wind wall and the second wind wall at the position of the air outlet gap, weaken the diversion phenomenon, and ensure that the airflow has sufficient airflow from the air outlet gap position. The higher the spray pressure and speed, the greater the speed and wind pressure of the airflow from the air outlet gap, the more obvious the entrainment effect on the surrounding air, the stronger the entrainment effect, which can bring about the overall air output of the bladeless fan Increase, thereby enhancing the user’s wind experience.

2. The first arc-shaped guide surface and the second arc-shaped guide surface of the machine head assembly in this application are both configured as arc surfaces. The arc surface has a good guide effect and can reduce the movement of gas on the flow surface. Compared with other types of curved surfaces, the arc surface has mature processing technology and low processing cost.

3. The first arc-shaped guide surface and the second arc-shaped guide surface in the head assembly of the present application are configured with different arc radii. In the above, an air outlet gap is formed between the first outflow surface and the second outflow surface, and along the flow direction of the airflow, the extension surface of the first arc-shaped diversion surface meets the second outflow surface, and the second arc-shaped diversion surface The extended surface of the surface meets the first outflow surface. In this application, different radian radii are adopted to meet the above constraint conditions, which is easy to design and operate.

4. In the head assembly of the present application, the first arc-shaped guide surface and the second arc-shaped guide surface are configured such that the arc radius of one of them is at least 4 times that of the other, so that the first arc-shaped guide surface can be guaranteed The position of the intersection of the extension surface of the flow surface and the second outlet surface or the intersection of the extension surface of the second arc-shaped diversion surface and the first outlet surface is located at the outlet end of the air outlet gap as much as possible, that is, the first wind The intersection point of the air flow of the wall and the second wind wall is close to the air outlet end of the air outlet gap to prevent the above-mentioned intersection point from meeting on the first arc-shaped diversion surface or the second arc-shaped diversion surface, causing the airflow to follow the arc surface Reflux, again forming a convection problem.

5. Both the first outflow surface and the second outflow surface of the machine head assembly in the present application are configured as flat surfaces, the plane is easy to process, and the air outlet gap formed between the two planes forcibly changes the direction of the airflow Strong ability, can improve the direct current jetting ability of the airflow at the air outlet gap, prevent the airflow from diverging to the surroundings and affect the speed of the airflow.

6. In the head assembly of the present application, a first transition surface is provided between the first arc-shaped guide surface and the first outlet surface, and a second transition surface is provided between the second arc-shaped guide surface and the second outlet surface. Transitional flow surface, which can realize the smooth transition of airflow to the first and second outflow surfaces when flowing along the first arc-shaped guide surface and the second arc-shaped guide surface, reducing the breakage at the flow surface The wind resistance caused by the difference.

7. In the head assembly of the present application, there is an outlet angle A between the air outlet direction of the first direction-changing flow channel and the horizontal air outlet direction, and the air outlet angle A is greater than or equal to 20 degrees and less than or equal to 40 degrees. The setting of the above-mentioned air outlet angle expands the maximum air outlet angle at the upper end of the bladeless fan. Compared with the prior art design where the air outlet direction is perpendicular to the user, the upper air outlet of the bladeless fan in this application is Inclination angle setting, when facing users of different heights, to satisfy the user's head as much as possible can also get an effective blowing effect, thereby improving the user's product experience.

8. The air inlet component of the air duct system in this application includes: an air inlet wall, which is annular, on which a number of air inlet structures are arranged; a deflector is arranged in the middle of the air inlet wall, and the outside air flows through the deflector Reversing the rearward guiding power device; and the collecting cover, which is arranged above the deflector, the air outlet end of which is connected to the power device and the collecting cover is constructed in a trumpet shape, and the structure of the collecting cover can be strengthened to the outside world The airflow collection ability increases the air volume, and at the same time, the position of the constricted opening on the collecting hood can increase the airflow speed, which can form an effective gain on the final wind speed.

9. In the air duct system of the present application, a first diffusion surface and a second diffusion surface are arranged opposite to each other at the junction of the diffusion flow channel and the outlet air duct, and the first diffusion surface and the second diffusion surface are respectively connected to the first diffusion surface and the second diffusion surface. A wind wall is connected to the second wind wall. The first diffusion surface and the second diffusion surface are configured as arc surfaces arranged parallel to each other. The structural features of the first diffusion surface and the second diffusion surface ensure that the gas flows through the diffusion assembly. The smooth flow and parallel arrangement ensure that the steering angle when the gas flows is small, which can effectively reduce the pressure loss caused by the steering and wall resistance, thereby ensuring the final air volume and pressure.

Description of the drawings

In order to more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

Figure 1 is a transverse cross-sectional view of the handpiece assembly in Embodiment 1 provided by this application;

Figure 2 is a partial enlarged view of Figure 1;

3 is a schematic diagram of the air flow principle in Embodiment 1 provided by this application;

4 is a longitudinal cross-sectional view of the handpiece assembly in Embodiment 1 provided by this application;

5 is a schematic diagram of the air outlet angle in Embodiment 1 provided by this application;

6 is a cross-sectional view of the air duct system in Embodiment 2 provided by this application;

FIG. 7 is a cross-sectional view of the air intake assembly in Embodiment 2 provided by this application;

FIG. 8 is a cross-sectional view of the bladeless fan in Embodiment 3 provided by this application.

Description of reference signs:

1. Outlet air duct; 11. DC air duct; 12. The first reversing flow duct;

2. The first wind wall; 21. The first arc-shaped diversion surface; 22. The first outflow surface; 23. The first transition flow surface;

3. The second wind wall; 31, the second arc-shaped diversion surface; 32, the second outlet surface; 33, the second transition flow surface;

4. Air inlet components; 41. Air inlet wall; 42, deflector; 43, collecting cover;

5. Power plant;

6. Flow guide components; 61. Second change-direction flow channel; 62. Diffusion flow channel; 621. First diffusion surface; 622. Second diffusion surface;

A. The wind angle;

a. Airflow convergence point; b. Critical intersection point of the first arc-shaped diversion surface; c. Extension surface of the first arc-shaped diversion surface;

7. Shell.

Detailed ways

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of this application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood under specific circumstances.

In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

Example 1

As shown in Figures 1 to 5, the head assembly provided by this embodiment includes an air outlet air duct 1 and a wind deflector. It has a first wind wall 2 and a second wind wall 3 arranged opposite to each other. The first wind wall 2 includes a first arc-shaped guide surface 21 and a first arc-shaped guide surface 21 along the airflow direction. The first outlet surface 22; the second wind wall 3 includes a second arc-shaped flow guide surface 31 and a second outlet surface 32 that is connected to the second arc-shaped flow guide surface 31 along the airflow direction; the first outlet surface An air outlet gap is formed between 22 and the second outlet surface 32, and along the flow direction of the airflow, the extension surface of the first arc-shaped flow guiding surface 21 meets the second outlet surface 32, and the extension of the second arc-shaped flow guiding surface 31 The surface meets at the first outflow surface 22.

The object of use of the head assembly in this embodiment is a commonly used bladeless fan. The bladeless fan generally has a circular air outlet frame, and an air outlet duct 1 is set inside, and the fan of the bladeless fan is set in the machine. In the lower part, the air outlet duct 1 is set on the upper part of the machine. When the airflow moves from bottom to top, the direction of movement needs to be changed to spray out from the air outlet gap toward the user. Therefore, the air deflector structure is designed (not shown in the figure). out).

The above-mentioned wind deflector structure divides the entire air outlet duct 1 into several air outlet parts. In this embodiment, the specific composition structure of one air outlet part is selected for specific elaboration, as shown in the structure in Fig. 1 and Fig. 2 Fig. 3 is an illustration of the principle of air flow in this structural form of this embodiment.

The first wind wall 2 and the second wind wall 3 of the existing bladeless fan generally have two symmetrically arranged structures, especially at the first arc-shaped guide surface 21 and the second arc-shaped guide surface 31, which are arranged in this way The result of is the intersection of the airflows at the first wind wall 2 and the second wind wall 3, as shown at a in Figure 3, the two airflows will meet in the form of equal-angle hedges. Under the counterforce of the hedging, The airflow will be scattered towards both sides, and the effect of gathering wind will be weakened.

The structural arrangement of the first arc-shaped guide surface 21 and the second arc-shaped guide surface 31 in this embodiment causes the intersection of the airflow to directly fall on the flow of the first outlet surface 22 or the second outlet surface 32. On the wall, the point b shown in Fig. 3 is the critical intersection point, and the points formed by the movement of point b toward the outlet of the wind gap are all protected objects of the embodiment. In Fig. 3, the first wind wall 2 is taken as an example. The intersection of the extended surface of the arc-shaped guide surface 21 and the second outflow surface 32 at point b is first affected by the structure and shape of the arc-shaped guide surface described above. In the initial stage of air flow, as shown in FIG. 3 , The first arc-shaped guide surface 21 has a greater slope of the flow surface, and the flow velocity of the fluid will be faster, causing the initial part of the airflow to reach the second outlet surface 32 first. A negative pressure zone is formed at the intersection point, and the airflow along the wall of the second arc-shaped guide surface 31 that arrives will converge toward the intersection point under the influence of pressure, so as to achieve an effective collection of airflow, and the intersection point is located At the outlet surface, under the influence of the shape of the wall surface, the flow toward the air outlet of the air outlet gap can be forcibly changed to prevent the problem of vortexing caused by partial airflow during symmetrical intersection in the prior art.

Therefore, for the above analysis, the air outlet part in this embodiment can effectively ensure that when the airflow leads to the air outlet gap, it prevents the airflow flowing through the first air wall 2 and the second air wall 3 from convection at the position of the air outlet gap. This phenomenon reduces the noise problem caused by the turbulence of the airflow. At the same time, it can enhance the collection effect of the airflow on the first wind wall 2 and the second wind wall 3 at the position of the air outlet gap, and weaken the diversion phenomenon to ensure the airflow. It has sufficient jet pressure and speed when it comes out of the air outlet gap. The greater the speed and wind pressure of the airflow from the air outlet gap, the more obvious the entrainment effect on the surrounding gas, and the stronger the entrainment effect, which can be used Since then, the overall air output of the bladeless fan has been increased, thereby enhancing the user's wind experience.

In this embodiment, both the first arc-shaped guide surface 21 and the second arc-shaped guide surface 31 are configured as circular arc surfaces. The circular arc surface has a good flow guiding effect and can reduce the pressure along the flow surface when the gas moves. Compared with other types of curved surface structures, the arc surface has mature processing technology and low processing cost.

In some other embodiments, the above-mentioned first arc-shaped diversion surface 21 and second arc-shaped diversion surface 31 can also be other quadric structures, such as sine curved surfaces, parabolic curved surfaces, spherical surfaces, and the like.

In some other embodiments, the above-mentioned first arc-shaped flow guide surface 21 and the second arc-shaped flow guide surface 31 may also be two different types of curved surfaces.

In the foregoing, an air outlet gap is formed between the first outlet surface 22 and the second outlet surface 32, and along the flow direction of the air flow, the extension surface of the first arc-shaped guiding surface meets the second outlet surface, and the second arc-shaped The extension surface of the diversion surface meets the first outflow surface. In order to ensure the above implementation results, the first arc-shaped diversion surface 21 and the second arc-shaped diversion surface 31 are configured with different arc radii in this embodiment. In this embodiment, the arc radius of the first arc guide surface 21 is smaller than the arc radius of the second arc guide surface 31.

Further, the arc radius of the first arc-shaped diversion surface 21 is four times the arc radius of the second arc-shaped diversion surface 31, so as to ensure that the extension surface of the first arc-shaped diversion surface 21 and the second outflow surface The position of the intersection of 32 or the intersection of the extension surface of the second arc-shaped guide surface 31 and the first outlet surface 22 is located at the outlet end of the air outlet gap as much as possible, that is, the first air wall 2 and the second air wall 3 The intersection point of the airflow is close to the air outlet end of the air outlet gap to prevent the above-mentioned intersection point from meeting on the first arc-shaped diversion surface or the second arc-shaped diversion surface, causing the airflow to flow back along the arc surface, again forming convection problems .

In some other embodiments, the effect that the multiple ratio of the above-mentioned radian radius relationship is greater than four times is better.

As shown in FIGS. 1 and 2, both the first outflow surface 22 and the second outflow surface 32 are configured as flat surfaces. The plane is easy to process, and the air outlet gap formed between the two planes has a strong ability to forcibly change the direction of the airflow, which can improve the direct current jetting ability of the airflow at the air outlet gap, and prevent the airflow from diverging to the surrounding and affecting the speed of the airflow. .

Further, the air outlet gap in this embodiment is configured to be 3 mm.

As shown in FIG. 3, a first transition surface 23 is formed between the first arc-shaped guide surface 21 and the first outlet surface 22, and a first transition surface 23 is formed between the second arc-shaped guide surface 31 and the second outlet surface 32. There is a second transition flow surface 33, which can realize the smooth transition of the air flow to the first outlet surface 22 and the second outlet surface 32 when flowing along the first arc-shaped flow guide surface 21 and the second arc-shaped flow guide surface 31 To reduce the wind resistance caused by the gap at the flow surface.

As shown in Figures 4 and 5, the air outlet duct 1 in this embodiment has a direct current duct 11 arranged along the height direction of the head assembly and a first variable connected to the upper end of the direct current duct 11 along the direction of airflow. There is an air outlet angle A between the air outlet direction of the first direction-changing channel 12 and the horizontal air outlet direction. The air outlet angle A is greater than or equal to 20 degrees and less than or equal to 40 degrees. The maximum air outlet angle at the upper end of the bladeless fan is compared with the design in the prior art where the air outlet direction is perpendicular to the user. When facing users of different heights, an effective blowing effect can be obtained by satisfying the user’s head as much as possible, thereby improving the user’s product experience. The air outlet angle A in this embodiment is 30 degrees, which satisfies the above requirements. At the same time as the user needs, it can also prevent the problem of waste of air caused by an excessively large air outlet angle.

Example 2

As shown in Figures 6 to 7, an air duct system provided by this embodiment includes: the nose assembly in the above-mentioned embodiment 1; The component 4 flows into the power unit 5; the guide component 6 is arranged on the power unit 5, and its air outlet end is connected to the air outlet duct 1.

Specifically, as shown in FIG. 7, the air inlet assembly 4 includes: an air inlet wall 41, which is annular in shape, on which a number of air inlet structures are provided. The air inlet structure in this embodiment is a circular air inlet. The external airflow enters the air duct system through the air inlet under the action of negative pressure. Since the initial air intake direction is basically parallel to the axial direction of the air duct, a number of baffles 42 are installed in the middle of the air inlet wall 41. The baffles 42 are vertically arranged and have a certain air inlet gap between them. Plate-like structure, the outside air flow is directed to the power unit 5 through the deflector 42 and directed to the power unit 5; and the collecting cover 43, which is arranged above the deflector 42, and the air flow guided by the deflector 42 directly flows into the collecting cover 43 The air outlet end of the collecting cover 43 is connected to the power unit 5, and part of the function of the power unit 5 is to provide the above-mentioned negative pressure effect.

As shown in FIG. 7, the collecting cover 43 is configured into a horn shape. The collecting cover 43 of this shape can strengthen the collection ability of the external air flow and increase the air volume. At the same time, the position of the constricted opening on the collecting cover 43 The speed of the air flow can be increased, which can form an effective gain to the final wind speed.

As shown in Fig. 6, the flow guide assembly 6 includes: a second direction-changing flow channel 61, in which a number of direction-changing blades are formed, and the direction-changing blades guide the rotating air flow from the power device 5 into a straight air flow; The flow channel 62 has its air inlet end connected to the second direction-changing flow channel 61 in sequence, and its air outlet end connected to the air outlet air channel 1. A first diffusion surface 621 and a second diffusion surface 622 are provided at the junction of the diffusion flow channel 62 and the air outlet air channel 1 opposite to each other, and the first diffusion surface 621 and the second diffusion surface 622 are respectively connected to the first air wall 2 It is connected to the second wind wall 3, and the first diffusion surface 621 and the second diffusion surface 622 are configured as arc surfaces arranged parallel to each other. The structural characteristics of the first diffusion surface 621 and the second diffusion surface 622 ensure that the gas is in When flowing through the diffusion channel, it flows smoothly and is arranged in parallel to ensure that the steering angle when the gas flows is small, which can effectively reduce the pressure loss caused by the steering and wall resistance, thereby ensuring the final air volume and pressure.

Example 3

As shown in FIG. 8, a fan provided by this embodiment, specifically a bladeless fan, includes the air duct system in the above embodiment 2, which specifically includes an air outlet air duct 1 and an air inlet component 4. The power plant 5 and the corresponding guide assembly 6 have all their technical advantages, so they will not be repeated here.

Obviously, the above-mentioned embodiments are merely examples for clear description, and are not intended to limit the implementation manners. For those of ordinary skill in the art, other changes or modifications in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the scope of protection created by this application.

Claims

A machine head assembly, comprising an air outlet air duct (1) and an air deflector. The air deflectors divide the air duct into a plurality of air outlets. The air outlet is characterized in that the air outlets have mutually The first wind wall (2) and the second wind wall (3) are arranged oppositely, wherein,

The first wind wall (2) includes a first arc-shaped guide surface (21) and a first outlet surface (22) that is connected to the first arc-shaped guide surface (21) along the airflow direction;

The second wind wall (3) includes a second arc-shaped guide surface (31) and a second outlet surface (32) that is connected to the second arc-shaped guide surface (31) along the airflow direction;

An air outlet gap is formed between the first outflow surface (22) and the second outflow surface (32), and along the flow direction of the airflow, the extension surface of the first arc-shaped deflector surface (21) meets The second outflow surface (32) and the extension surface of the second arc-shaped diversion surface (31) converge on the first outflow surface (22).
The head assembly according to claim 1, wherein the first arc-shaped flow guiding surface (21) and the second arc-shaped flow guiding surface (31) are both configured as circular arc surfaces.
The handpiece assembly according to claim 2, wherein the first arc-shaped guide surface (21) and the second arc-shaped guide surface (31) are configured to have different arc radii.
The handpiece assembly according to claim 3, characterized in that the first arc-shaped deflector surface (21) and the second arc-shaped deflector surface (31) are configured such that the radius of curvature of one of them is at least 4 times the other.
The handpiece assembly according to any one of claims 1 to 4, wherein the first outflow surface (22) and the second outflow surface (32) are both configured as flat surfaces.
The handpiece assembly of claim 5, wherein the air outlet gap is configured to be 3 mm.
The handpiece assembly according to claim 1, wherein a first transitional flow surface (23) is provided between the first arc-shaped flow guiding surface (21) and the first outflow surface (22), A second transitional flow surface (33) is provided between the second arc-shaped flow guiding surface (31) and the second outflow surface (32).
The head assembly according to any one of claims 1 or 2 or 3 or 4 or 7, characterized in that the air outlet duct (1) has a direct current air duct arranged along the height direction of the head assembly (11) and a first direction-changing flow channel (12) which is connected to the upper end of the direct current air channel (11) along the flow direction of the airflow.
The head assembly according to claim 8, characterized in that there is an outlet angle A between the air outlet direction of the first direction-changing flow channel (12) and the horizontal air outlet direction, and the air outlet angle A is greater than Equal to 20 degrees and less than or equal to 40 degrees.
The head assembly according to claim 9, wherein the air outlet angle A is 30 degrees.
An air duct system is characterized in that it comprises:

The handpiece assembly of any one of claims 1-10;

The air inlet component (4) is arranged below the power device (5), and the outside air flows into the power device (5) through the air inlet component (4);

The guide assembly (6) is arranged on the power device (5), and the air outlet end is connected to the air outlet duct (1).
The air duct system according to claim 11, wherein the air inlet component (4) comprises:

The air inlet wall (41) is in the shape of a ring, on which a number of air inlet structures are arranged;

The deflector (42) is arranged in the middle of the air inlet wall (41), and the outside air flow is redirected through the deflector (42) and guided to the power device (5);

And a collecting cover (43), which is arranged above the deflector (42), and its air outlet end is connected to the power unit (5).
The air duct system according to claim 12, characterized in that the collecting cover (43) is configured in a trumpet shape.
The air duct system according to any one of claims 11-13, characterized in that the diversion component (6) comprises:

The second direction-changing flow passage (61) is provided with a plurality of direction-changing blades, and the direction-changing blades guide the rotating airflow from the power device (5) into a straight airflow;

The diffuser flow channel (62) has an air inlet end connected to the second direction-changing flow channel (61) and its air outlet end is connected to the air outlet air channel (1).
The air duct system according to claim 14, characterized in that a first diffusion surface (621) and a first diffusion surface (621) and The second diffusion surface (622), and the first diffusion surface (621) and the second diffusion surface (622) are respectively connected with the first wind wall (2) and the second wind wall (3).
The air duct system according to claim 15, wherein the first diffusion surface (621) and the second diffusion surface (622) are configured as arc surfaces arranged parallel to each other.
A fan is characterized in that it comprises:

The handpiece assembly of any one of claims 1-10;

Or the air duct system of any one of claims 11-16.
The fan according to claim 17, wherein the fan is a bladeless fan.