WO2022142359A1 - Air supply apparatus - Google Patents

Abstract

An air supply apparatus, comprising a housing (100) and a first air guide member (300), a second air guide member (200), and a rotatable axial flow wind wheel (400) arranged inside the housing; the housing is provided with an air inlet (100a) and a circumferential air outlet (100b), the circumferential air outlet being arranged around the periphery of a rotating shaft of the axial flow wind wheel; the first air guide member is arranged around the periphery of the axial flow wind wheel and cooperates with the second air guide member to form a circumferential air supply duct in communication with the circumferential air outlet; when the circumferential air supply duct is open, the part of the second air guide member closest to the rotating shaft of the axial flow wind wheel forms a flow guide protrusion (210), and the distance X between the remaining part and the first air guide member gradually increases along the direction away from the rotating shaft of the axial flow fan wheel. The present air supply apparatus can solve the problems of the short air supply distance and the small air supply range and air supply speed, and enhance the wind sensation and user experience of the whole machine.

Description

Air supply device

Related applications

This application claims the priority of the Chinese patent application filed on December 31, 2020, the application number is 202011641489.2, and the title is "Air Supply Device", which is hereby incorporated by reference in its entirety.

technical field

The present application relates to the technical field of electrical appliances, and in particular, to an air supply device.

Background technique

At present, electric fans can usually send air 360 degrees to improve the user experience. However, this type of electric fan has a short air supply distance, a small air supply range and a small air supply speed, which reduces its use performance.

SUMMARY OF THE INVENTION

Based on this, the present application provides an air supply device to solve the technical problems of the short air supply distance, air supply range and air supply speed of the traditional electric fan.

An air supply device, comprising: a casing, a first air guide, a second air guide and a rotatable axial-flow wind wheel arranged in the casing;

The casing is provided with an air inlet and a circumferential air outlet, and the circumferential air outlet is arranged around the rotating shaft of the axial flow fan;

The first air guide member is arranged around the axial flow wind wheel and cooperates with the second air guide member to form a circumferential air supply air duct communicated with the circumferential air outlet;

When the circumferential air supply air duct is opened, the part of the second air guide member close to the rotating shaft of the axial flow fan forms a guide bulge, and the distance between the remaining parts and the first air guide member is along the The direction away from the axis of rotation of the axial flow fan increases gradually.

In one embodiment, the surface of the guide protrusion is a circular arc surface, and the center of the circular arc surface is located on the rotating shaft of the axial flow fan.

In one embodiment, a smooth transition is made between the air guide protrusion and the rest of the second air guide member.

In one embodiment, the distance H between the end face of the first air guide member close to the second air guide member and the axial flow fan wheel is greater than or equal to 0 mm and less than or equal to the diameter of the axial flow fan wheel 1/8 of D.

In one embodiment, the distance A between the first air guide member and the axial flow impeller is greater than or equal to 1/50 of the diameter D of the axial flow impeller and less than or equal to the axial flow impeller 1/25 of the diameter D.

In one of the embodiments, a port of the first air guide member close to the air inlet is provided with an air guide chamfer structure.

In one embodiment, the length B of the circumferential air outlet in the direction of the axis of rotation of the axial fan is greater than or equal to 17 mm and less than or equal to 1/8 of the diameter D of the axial fan.

In one of the embodiments, a circumferential air outlet grille is provided at the circumferential air outlet, and a plurality of wind shielding portions are provided at intervals along the circumferential direction of the circumferential air outlet grille. The inclination direction is the same as the rotational tangent direction of the fluid generated by the rotation of the axial flow fan.

In one of the embodiments, the circumferential air outlet is provided with a circumferential air outlet grille, and a plurality of circumferential air holes are provided on the circumferential air outlet grille, and the circumferential air outlet holes are arranged along the circumferential direction. Extends toward the circumference of the outlet grille.

In one embodiment, an air inlet grille is provided at the air inlet, and a plurality of air inlet holes on the air inlet grille are radially distributed, and the rotation direction of each of the air inlet holes is the same as that of all the air inlet holes. The components of the rotational speed of the blades of the axial flow fan in the circumferential direction are the same.

In one embodiment, the length of the air inlet hole in the circumferential direction of the air inlet grille is 4 mm˜12 mm.

In one of the embodiments, the housing further has an axial air outlet, the length direction of the axial air outlet is the same as the direction of the rotating shaft of the axial flow fan, the axial air outlet, the The circumferential air outlets are sequentially distributed along the direction close to the axial flow wind wheel;

The first air guide member and the second air guide member also cooperate to form an axial air supply air duct communicated with the axial air outlet;

The second air guide member can be opened and closed, the second air guide member opens the axial air supply air duct when opened, and closes the axial air supply air duct when closed.

In one embodiment, an axial air outlet grille is provided at the axial air outlet, and a plurality of axial air outlet holes on the axial air outlet grille are radially distributed, and each of the The direction of rotation of the axial air outlet is consistent with the direction of the component of the rotational speed of the fan blades of the axial flow fan in the circumferential direction.

In one embodiment, the length of the axial air outlet hole in the circumferential direction of the axial air outlet grille is 4 mm˜12 mm.

In the above-mentioned air supply device, the air flow generated by the axial-flow wind wheel flows along the first air-guiding member toward the bulge of the second air-guiding member, instead of spreading around the axial-flow fan wheel, so as to ensure the air volume of the air flow. and speed, and then flows along the surface of the second air guide member through the guiding action of the diversion protrusion. Since the distance between the flowing surface and the first air guide member gradually increases in the direction away from the axis of rotation of the axial flow wind wheel, Making the air flow out from the circumferential air outlet in an obliquely upward direction can not only reduce the probability of the airflow generating vortex vortices at the air outlet, thereby reducing the loss of air volume and wind speed, but also prevent the air flow from going up and down near the circumferential air outlet. Under the action of the pressure difference in the lower area, it bends downward and flows against the wall of the desktop, which can solve the problems of short air supply distance, small air supply range and small air supply speed, and improve the wind feeling and user experience of the whole machine.

Description of drawings

FIG. 1 is an exploded schematic diagram of an air supply device provided by an embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of an air supply device according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of an air supply device provided by an embodiment of the present application.

FIG. 4 is a schematic diagram of the internal structure of an air supply device provided in an embodiment of the present application in a 360-degree air supply state.

FIG. 5 is a top view of a lower cover provided by an embodiment of the present application.

FIG. 6 is a bottom view of the top cover of the air supply device provided in an embodiment of the application in a 360-degree air supply state.

FIG. 7 is a front view of the top cover of the air supply device provided in an embodiment of the application in a 360-degree air supply state.

FIG. 8 is a bottom view of the top cover of the air supply device provided in an embodiment of the application in an axial air supply state.

FIG. 9 is a front view of the top cover of the air supply device provided in an embodiment of the application in an axial air supply state.

FIG. 10 is a schematic diagram of the internal structure of the air supply device provided in an embodiment of the application in an axial air supply state.

FIG. 11 is a schematic structural diagram of an air supply device provided by an embodiment of the application under different heights of the circumferential air outlets.

12 to 17 are simulation structural diagrams of the airflow provided in an embodiment of the application flowing in sequence in the air supply device provided by the solutions 1 to 6.

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Traditional air supply devices, such as fans, are mostly used in desktop scenarios because the 360-degree air supply mode is used for 360-degree air supply in the horizontal plane, and the air inlet 100a of the fan is located at the bottom of the fan housing 100. The influence will cause the air flow generated by the axial flow fan 400 to cause a wall-to-wall jet phenomenon. Due to the limitation of the desktop wall, the surrounding medium is continuously sucked into the fan by the flow layer close to the desktop wall, which increases the fluid velocity gradient in this area. Under the action of the increase of kinetic energy and friction, the static pressure in this area decreases, which causes the pressure in the area near the air inlet 100a at the bottom of the fan to be lower than the pressure in the area above the air inlet 100a, so the airflow sent by the fan in the 360-degree air supply state Under the action of the upper and lower pressure difference, it bends downward and flows against the wall of the desktop, thereby affecting the air supply direction, range, and air supply speed of the fan, reducing the wind feeling and user experience of the whole machine. It should be noted that the desktop refers to any work surface on which the fan can be placed, not only the surface of the table, but also the ground by way of example.

As shown in FIG. 1 and FIG. 2 , an embodiment of the present application provides an air supply device, the air supply device includes: a housing 100 , and a first air guide 300 and a second air guide arranged in the housing 100 . 200 and the rotatable axial flow fan 400; as shown in FIG. 3, the housing 100 has an air inlet 100a and a circumferential air outlet 100b, and the circumferential air outlet 100b is arranged around the axis of the axial flow fan 400. As shown in Figure 4, the first air guide 300 is arranged around the axial flow wind wheel 400 and cooperates with the second air guide 200 to form a circumferential air supply air duct that communicates with the circumferential air outlet 100b; such as As shown in FIG. 7 , when the circumferential air supply duct is opened, the second air guide member 200 forms the guide protrusion 210 at the part close to the rotating shaft of the axial flow wind wheel 400 , and the distance between the other parts and the first air guide member 300 X (see FIG. 4 ) gradually increases in the direction away from the rotation axis of the axial-flow wind rotor 400 .

As an example, the air supply device is a fan. In application, the fan can be placed on the work surface according to the display directions shown in FIGS. 1 to 4 . At this time, the circumferential air outlets 100b of the casing 100 are distributed circumferentially on the horizontal plane and located above the air inlets 100a. In some embodiments, the first air guide member 300 is an air guide pipe with openings at both upper and lower ends, the lower end edge of the air guide pipe is located above the air inlet 100a, and the upper end edge of the air guide pipe is located at the circumferential air outlet 100b below.

As an example, as shown in FIG. 2 , the air supply device further includes: a first driving structure 600 located in the casing 100 and used for driving the axial flow fan wheel 400 to rotate. The first driving structure 600 is a motor, including a motor body 610 and a motor cover 620 . The output shaft of the motor main body 610 is connected to the axial flow fan 400 , as shown in FIG. Wherein, the closed installation surface is a curved disk surface, and the rotation axis of the axial flow fan wheel 400 is perpendicular to the tangential plane of the closed installation surface.

In the above-mentioned air supply device, the airflow generated by the axial-flow wind wheel 400 flows along the first air-guiding member 300 toward the air-guiding protrusions 210 of the second air-guiding member 200 , and does not spread around the axial-flow fan wheel 400 , to ensure the air volume and speed of the airflow, and then flow along the surface of the second air guide member 200 through the guiding action of the guide protrusion 210. Due to the distance X between the flowing surface and the first air guide member 300, the axial flow wind is far away from the The direction of the rotation axis of the wheel 400 is gradually increased, so that the airflow flows out from the circumferential air outlet 100b in an obliquely upward direction, which can not only reduce the probability of the airflow generating vortex vortices at the air outlet, thereby reducing the loss of air volume and wind speed, but also can This airflow is prevented from being bent downward under the pressure difference between the upper and lower areas near the circumferential air outlet 100b and flowing against the wall of the desktop, thereby solving the problems of short air supply distance, air supply range and air supply speed, and improving the overall performance. Air and user experience.

As shown in FIG. 7 , in some embodiments of the present application, the surface of the guide protrusion 210 is a circular arc surface, and the center of the circular arc surface is located on the rotating shaft of the axial flow fan wheel 400 . Convergence and collision of the airflow flowing out along the first air guide member 300 at the axis line on the second air guide (ie, the axis of rotation of the axial wind wheel 400 ) can be reduced, and the air volume of the whole machine can be increased.

As shown in FIG. 7 , in some embodiments of the present application, there is a smooth transition between the air guide protrusion 210 and the rest of the second air guide member 200 . The loss of the air volume and the speed of the airflow in the process of passing through the second air guide member 200 can be reduced.

In some embodiments of the present application, the distance H between the end surface of the first air guide member 300 close to the second air guide member 200 and the axial flow fan wheel 400 is greater than or equal to 0 mm and less than or equal to the diameter D of the axial flow fan wheel 400 1/8. As an example, as shown in FIG. 4 and FIG. 10 , the distance H is equal to the distance H2 between the end surface of the first air guide 300 close to the second air guide 200 and the closed mounting surface 140 at the bottom of the housing 100 minus the axial flow wind The distance H1 between the hub of the wheel 400 and the closed mounting surface 140 at the bottom of the housing 100 . The relative installation height between the axial flow fan wheel 400 and the first air guide member 300 is limited, that is, the maximum size of the distance H2 is given. At this time, the purpose of setting the optimal size is to prevent the axial flow fan wheel The relative installation height between 400 and the first air guide member 300 is too large, which leads to an excessively long air guide stroke along the direction of the axis of rotation of the axial-flow fan wheel 400 during the air supply process, which reduces the outlet wind speed and air supply in the subsequent 360-degree air supply function of the fan. The wind distance affects the air volume of the entire fan; in addition, an excessively large relative installation height will make the axial flow wind wheel 400 and the first air guide member 300 cover a larger ratio, thereby increasing the interference noise inside the first air guide member 300 . The specific setting of the distance H can be reasonably considered based on the overall size of the fan.

As shown in FIG. 4 and FIG. 10 , in some embodiments of the present application, the distance A between the first air guide member 300 and the axial flow impeller 400 is greater than or equal to 1/50 of the diameter D of the axial flow impeller 400 and less than or equal to 1/25 of the diameter D of the axial flow fan wheel 400 . The first air guide 300 plays the role of condensing the wind and fluid, which can effectively reduce the loss of air volume caused by the diffusion of the fluid to the surrounding during the air supply process of the axial flow impeller, thereby increasing the outlet wind speed and flow. Therefore, the gap between the two should not be too large, which will affect the In addition, when the axial flow impeller rotates at a high speed, the speed fluctuation of the turbulent boundary layer of the blades of the axial flow impeller 400 and the surface of the first air guide 300 will cause the surface of the blades and the first air guide 300 to fluctuate. The pressure fluctuates between them, resulting in turbulent boundary layer noise and howling, so the gap between the two should not be too small. To sum up, by setting the above-mentioned embodiment of the present application, the purpose of increasing the air volume and increasing the outlet wind speed can be achieved, and at the same time, the dynamic and static interference between the blades of the axial flow wind wheel 400 and the first air guide member 300 can be reduced, and the discrete noise of the blades can be reduced. It ensures the control of the noise level. The specific setting of the distance A can be reasonably considered based on the overall size of the fan.

As shown in FIG. 2 , in some embodiments of the present application, the port of the first air guide member 300 close to the air inlet 100 a is provided with an air guide chamfer structure 310 . As an example, the wind guide chamfer structure 310 is an arc inlet wind guide ring. The arc tangent of the arc inlet air guide ring is consistent with the flow direction of the air inlet fluid, which can not only prevent the sudden change of the airflow entering the first air guide member 300, but also effectively improve the airflow separation at the inlet of the first air guide member 300. The loss caused by the right-angle air guide chamfering structure 310 to the air volume of the air inlet 100a is reduced; at the same time, the arc inlet air guide ring can reduce the reflection surface in the process of fluid flow, reduce the turbulence of the inflow, and reduce the flow of air into the first air guide member Radial eddy current noise at 300, so as to achieve the effect of noise reduction of the whole machine.

As shown in FIG. 4 and FIG. 10 , in some embodiments of the present application, the length B of the circumferential air outlet 100 b in the direction of the rotation axis of the axial flow fan wheel 400 is greater than or equal to 17 mm and less than or equal to the length of the axial flow fan wheel 400 . 1/8 of diameter D. Since the 360-degree air supply mode of the fan is jet flow, during the air supply process, since the fluid is separated from the original restricted environment, it continues to flow and spread in space. According to the characteristics of the jet, the core area of the jet and the external static gas area will be Momentum and mass are exchanged, and the air volume increases in this process, but the wind speed decays seriously. In order to solve this problem, the embodiment of the present application also considers the jet wind speed and air volume flowing out through the circumferential air outlet 100b and the height of the circumferential air outlet 100b (i.e. The length B) of the circumferential air outlet 100b in the direction of the axis of rotation of the axial flow fan 400 has the following relationship: a larger height of the circumferential air outlet 100b will increase the air volume of the whole machine, but it will lead to a decrease in wind speed, and a too small circumferential direction The height of the air outlet 100b will cause the wind speed and air volume to decrease at the same time, and the length of the circumferential air outlet 100b in the direction of the axis of rotation of the axial flow wind wheel 400 is reasonably set, which can ensure that the wind speed is optimal when the air volume is sufficient. The following is an analysis of the solutions of the 6 groups of air supply devices with different sizes of the length B of the circumferential air outlet 100b by means of simulation. As shown in Figures 12 to 17 and Table 1, the air supply device provided by the solution 3 is in the case of ensuring sufficient air volume. Downwind speed is optimal (see Figure 14).

Table 1

Program	Air volume (m 3 /h)	Outlet wind speed (m/s)
1	484.56	9.5
2	529.88	10.3
3	566.15	10.4
4	577.68	10.3
5	583.17	10.2
6	595.25	9.5

In some embodiments of the present application, as shown in FIG. 8 , the maximum diameter D2 of the circumferential air outlet 100b is larger than the diameter D of the axial flow fan 400 . The problems such as reduced air volume, poor noise, and poor sound quality caused by the turbulence of the fluid inside the first air guide member 300 due to the too small diameter of the circumferential air outlet 100b are prevented.

As shown in FIG. 2 , in some embodiments of the present application, the circumferential air outlet 100b is provided with a circumferential air outlet grille 510, and the circumferential air outlet grille 510 is provided with a plurality of wind shields at intervals along its own circumferential direction , the inclination direction of the edge of the wind shield is the same as the tangential direction (ie, the direction tangent to the rotation direction) of the fluid generated by the rotation of the axial fan wheel 400 . In this way, the reflection area between the airflow of the circumferential air outlet 100b and the circumferential air outlet grille 510 can be reduced, the dynamic and static interference between the circumferential air outlet grille 510 and the axial flow fan wheel 400 can be reduced, the purpose of noise reduction can be achieved, and the noise reduction can be achieved. The wind pressure of the circumferential air outlet 100b is increased, thereby improving the problem of fast attenuation of the free jet wind speed, and further improving the wind speed and air supply distance of the circumferential air outlet 100b, and improving the wind feeling.

In some embodiments, the circumferential air outlet grille 510 is provided with a plurality of circumferential air outlet holes, and the circumferential air outlet holes extend along the circumferential direction of the circumferential air outlet grille 510 (refer to FIG. 1 ). Compared with the circumferential air outlet holes distributed up and down, the reflection surface between the fluid and the circumferential air outlet grille 510 can be reduced, and the wind speed and air volume of the circumferential air outlet grille 510 to the circumferential air outlet holes can be greatly reduced. losses caused.

As an example, as shown in FIG. 1 and FIG. 2 , the housing 100 includes: a top cover 120 that can cover the lower case 110 on the lower case 110 . The air inlet 100 a is opened at the bottom of the lower casing 110 (see FIG. 3 ); the circumferential outlet grill 510 is connected between the lower casing 110 and the top cover 120 .

As shown in FIG. 2 , in some embodiments of the present application, an air intake grill 520 is provided at the air inlet 100a, and the plurality of air intake holes on the air intake grill 520 are radially distributed, and each air intake hole is The direction of rotation is the same as the component direction of the rotational speed of the fan blades of the axial flow fan wheel 400 in the circumferential direction. In this way, it not only increases the radial inflow at the air inlet of the fan, thereby increasing the effective inflow area of the fan, which is beneficial to increase the flow rate, but also ensures that the fluid flow direction of the air inlet hole and the rotation of the fan blades of the axial flow fan wheel 400 generate airflow direction. The consistency of the air flow reduces the sudden change of the air flow when the air flow enters the air inlet grille 520, and better ensures the uniformity of the air flow, thereby reducing the aerodynamic noise caused by the turbulent flow. It should be noted that the air inlet hole refers to the gap between two adjacent grid plates on the air inlet grill 520 . In some embodiments, the plurality of air inlet holes may be distributed in a radial spiral or in a radial arc. In some embodiments, the length of the air inlet hole in the circumferential direction of the air inlet grill 520 is 4 mm˜12 mm (eg, 4 mm, 8 mm, 12 mm, etc.). In some embodiments, the air inlet grill 520 is integrally formed on the bottom of the lower case 110 .

In some embodiments of the present application, as shown in FIG. 3 , the housing 100 further has an axial air outlet 100c, and the length direction of the axial air outlet 100c is the same as the direction of the rotating shaft of the axial flow impeller 400, and the axial outlet The air outlet 100c and the circumferential air outlet 100b are distributed in sequence along the direction close to the axial flow wind wheel 400; the first air guide member 300 and the second air guide member 200 also cooperate to form an axial air supply that communicates with the axial air outlet 100c. Air duct; the second air guide member 200 can be opened and closed, the second air guide member 200 opens the axial air supply air duct when it is opened, and closes the axial air supply air duct when it is closed. It should be noted that when the second air guide member 200 is opened, since the air flow generated by the axial flow fan wheel 400 is distributed along the direction of the rotation axis of the axial flow fan wheel 400, most of the air flow generated by the axial flow fan wheel 400 flows in the axial direction. Only a very small part of the air outlet 100c flows to the circumferential air outlet 100b, and the circumferential air supply air duct can be considered to be in a closed state at this time. By controlling the opening and closing of the second air guide member 200, the air supply mode of the air supply device can be adjusted, that is, the 360-degree air supply mode shown in FIG. 4 and the axial air supply mode shown in FIG. 10 . It should be noted that the arrows shown in FIG. 4 and FIG. 10 represent the airflow direction. In some embodiments, the air supply device further includes: a base, on which the housing 100 is rotatably disposed. When the axial air supply mode of the air supply device is adopted, the housing 100 can be rotated until the axial air outlet 100c on the housing 100 is adjusted from a vertical direction to a horizontal direction to supply air to the user.

As an example, as shown in FIG. 6 to FIG. 9 , the second air guide member 200 includes a plurality of air guide plates 220 that are radially distributed around the rotating shaft of the axial fan wheel 400 . The air guide plates 220 include: a first A guide part and a second guide part; one end of the first guide part away from the rotating shaft of the axial flow fan wheel 400 has a first rotating shaft, and one end of the first guide part close to the rotating shaft of the axial flow fan wheel 400 has a second rotating shaft, which is also related to the first rotating shaft. The two guide parts are connected; the first guide part can be rotated in the housing 100 through the first rotating shaft and the second rotating shaft to realize the closing of the second air guide member 200; the second guide parts of the plurality of air guide plates 220 can be rotated The guide protrusions 210 are formed in cooperation with each other. The opening and closing of the second air guide member 200 can be realized by artificially rotating the air guide plate 220 , and the opening and closing of the second air guide member 200 can also be driven by the relevant second driving structure. Exemplarily, a driven wheel is provided on the second rotating shaft, and the second driving structure includes: a motor, a driving wheel connected to the output shaft of the motor, and the driving wheel is engaged with the driven wheel; when the driving wheel rotates, the driven wheel can be driven to rotate, and then The wind deflector 220 is driven to rotate. The upper opening of the air supply device may include a control module electrically connected to the first driving structure 600 and the second driving structure, and the control module is used to adjust the air supply of the air supply device by controlling the first driving structure 600 and the second driving structure. wind mode. In this way, the automation degree of the air supply device can be improved, and the user experience can be improved.

In some embodiments of the present application, as shown in FIG. 2 , the axial air outlet 100c is provided with an axial air outlet grill 530, and the plurality of axial air outlet holes on the axial air outlet grill 530 are radial. distribution, and the rotation direction of each axial air outlet hole is consistent with the component direction of the rotational speed of the fan blades of the axial flow fan wheel 400 in the circumferential direction. In this way, the consistency of the fluid flow direction of the axial air outlet holes and the air flow direction generated by the rotation of the fan blades of the axial flow fan wheel 400 can be ensured, the sudden change of the air flow when the air flow flows out of the axial air outlet grille 530 is reduced, and the air flow is better ensured uniformity, thereby reducing aerodynamic noise caused by turbulence. It should be noted that the axial air outlet hole refers to the gap between two adjacent grid plates on the axial air outlet grill 530 . In some embodiments, the plurality of axial air outlet holes may be distributed in a radial arc. In some embodiments, the length of the axial outlet hole in the axial direction of the axial outlet grill 530 is 4 mm˜12 mm (eg, 4 mm, 8 mm, 12 mm, etc.). In some embodiments, the axial outlet grill 530 is integrally formed on the top cover 120 of the housing 100 .

In some embodiments of the present application, the maximum diameter D1 of the air inlet 100a, the maximum diameter D2 of the axial air outlet 100c, and the diameter D of the axial flow impeller decrease in sequence. In this way, problems such as reduction of air volume, poor noise and sound quality caused by the turbulence of the internal fluid of the first air guide member 300 caused by the too small diameter of the axial air outlet 100c can be prevented, and it can also be improved when the first air guide member 300 is in the The side air leakage phenomenon in the axial air supply state ensures the efficiency of the axial air supply.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (14)

1. An air supply device, comprising: a casing, a first air guide, a second air guide and a rotatable axial-flow wind wheel arranged in the casing;

   The casing is provided with an air inlet and a circumferential air outlet, and the circumferential air outlet is arranged around the rotating shaft of the axial flow fan;

   The first air guide member is arranged around the axial flow wind wheel and cooperates with the second air guide member to form a circumferential air supply air duct communicated with the circumferential air outlet;

   When the circumferential air supply air duct is opened, the part of the second air guide member close to the rotating shaft of the axial flow fan forms a guide protrusion, and the distance X between the remaining parts and the first air guide member It gradually increases in the direction away from the axis of rotation of the axial flow fan.
2. The air supply device according to claim 1, wherein the surface of the guide protrusion is a circular arc surface, and the center of the circular arc surface is located on the rotating shaft of the axial flow fan.
3. The air supply device according to claim 1, wherein a smooth transition is made between the air guide protrusion and the rest of the second air guide member.
4. The air supply device according to claim 1, wherein the distance H between the end face of the first air guide member close to the second air guide member and the axial flow fan wheel is greater than or equal to 0 mm and less than or equal to the 1/8 of the diameter D of the axial fan.
5. The air supply device according to claim 1, wherein the distance A between the first air guide member and the axial flow fan wheel is greater than or equal to 1/50 of the diameter D of the axial flow fan wheel and less than or equal to 1/25 of the diameter D of the axial fan.
6. The air supply device according to claim 1, wherein a port of the first air guide member close to the air inlet is provided with an air guide chamfer structure.
7. The air supply device according to claim 1, wherein the length B of the circumferential air outlet in the direction of the axis of rotation of the axial flow fan is greater than or equal to 17 mm and less than or equal to the diameter D of the axial flow fan 1/8 of .
8. The air supply device according to claim 1, wherein the circumferential air outlet is provided with a circumferential air outlet grille, and the circumferential air outlet grille is provided with a plurality of wind shields at intervals along its circumferential direction, The inclination direction of the edge of the wind shield is the same as the tangential direction of the fluid generated by the rotation of the axial flow fan.
9. The air supply device according to claim 1, wherein a circumferential air outlet grille is arranged at the circumferential air outlet, and a plurality of circumferential air outlet holes are arranged on the circumferential air outlet grille, and the The circumferential air outlet holes extend along the circumference of the circumferential air outlet grille.
10. The air supply device according to claim 1, wherein an air inlet grille is arranged at the air inlet, and the plurality of air inlet holes on the air inlet grille are radially distributed, and each of the air inlets The direction of rotation of the hole is the same as the direction of the component of the rotational speed of the fan blades of the axial flow fan in the circumferential direction.
11. The air supply device according to claim 10, wherein the length of the air inlet hole in the circumferential direction of the air inlet grille is 4 mm˜12 mm.
12. The air supply device according to any one of claims 1-11, wherein the housing further has an axial air outlet, and the length direction of the axial air outlet is the same as the direction of the rotating shaft of the axial flow fan. In the same way, the axial air outlet and the circumferential air outlet are sequentially distributed along the direction close to the axial flow wind wheel;

    The first air guide member and the second air guide member also cooperate to form an axial air supply air duct communicated with the axial air outlet;

    The second air guide member can be opened and closed, the second air guide member opens the axial air supply air duct when opened, and closes the axial air supply air duct when closed.
13. The air supply device according to claim 12, wherein an axial air outlet grille is provided at the axial air outlet, and a plurality of axial air outlet holes on the axial air outlet grille are radially distributed , and the direction of rotation of each of the axial air outlet holes is consistent with the direction of the component of the rotational speed of the fan blades of the axial flow fan in the circumferential direction.
14. The air supply device according to claim 13, wherein the length of the axial air outlet hole in the circumferential direction of the axial air outlet grille is 4 mm˜12 mm.

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