Air supply device

Abstract

The present invention relates to an air supply device. The air supply device comprises a shell, and a first air guide, a second air guide and a rotatable axial flow wind wheel arranged in the shell; the shell 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 wind wheel; the first air guide is arranged around the axial flow wind wheel and cooperates with the second air guide to form a circumferential air supply duct connected to the circumferential air outlet; when the circumferential air supply duct is opened, the part of the second air guide close to the rotating shaft of the axial flow wind wheel forms a guide protrusion and the distance X between the remaining part and the first air guide gradually increases in the direction away from the rotating shaft of the axial flow wind wheel. The air supply device can solve the problems of short air supply distance, small air supply range and small air supply speed, and improve the wind feeling of the whole machine and user experience.

Description

Technical Field

[0001] The invention relates to the technical field of electrical appliances, and in particular to an air supply device. Background Art

[0002] At present, electric fans can usually deliver air at 360 degrees to improve user experience. However, such electric fans have a short air delivery distance, a small air delivery range and a small air delivery speed, which reduces their performance. Summary of the invention

[0003] Based on this, the present invention provides an air supply device to solve the problems of short air supply distance, small air supply range and small air supply speed of the existing electric fan, which can solve the technical problem.

[0004] An air supply device comprises: a housing, and a first air guide member, a second air guide member and a rotatable axial flow wind wheel arranged in the housing;

[0005] The housing 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 wind wheel;

[0006] The first air guide member is disposed around the axial flow wind wheel and cooperates with the second air guide member to form a circumferential air supply duct communicating with the circumferential air outlet;

[0007] When the circumferential air supply duct is opened, a portion of the second air guide member close to the rotating shaft of the axial flow wind wheel forms an air guide protrusion and the distance between the remaining portion and the first air guide member gradually increases in a direction away from the rotating shaft of the axial flow wind wheel.

[0008] In one of the embodiments, the surface of the guide protrusion is an arc surface, and the center of the arc surface is located on the rotating shaft of the axial flow wind wheel.

[0009] In one of the embodiments, there is a smooth transition between the guide protrusion and the rest of the second air guide member.

[0010] In one of the embodiments, a distance H between an end surface of the first air guide member close to the second air guide member and the axial flow wind wheel is greater than or equal to 0 mm and less than or equal to 1 / 8 of a diameter D of the axial flow wind wheel.

[0011] In one embodiment, a distance A between the first air guide and the axial flow wind wheel is greater than or equal to 1 / 50 of a diameter D of the axial flow wind wheel and less than or equal to 1 / 25 of the diameter D of the axial flow wind wheel.

[0012] 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.

[0013] In one of the embodiments, a length B of the circumferential air outlet in the direction of the rotation axis of the axial flow wind wheel is greater than or equal to 17 mm and less than or equal to 1 / 8 of a diameter D of the axial flow wind wheel.

[0014] In one of the embodiments, a circumferential air outlet grille is provided at the circumferential air outlet, and a plurality of wind shields are provided at intervals along the circumference of the circumferential air outlet grille, and the inclination direction of the wind shields is the same as the shearing direction of the fluid generated by the rotation of the axial flow wind wheel.

[0015] In one of the embodiments, a circumferential air outlet grille is provided at the circumferential air outlet, and a plurality of circumferential air holes are provided on the circumferential air outlet grille. The circumferential air outlet holes extend along the circumference of the circumferential air outlet grille.

[0016] In one of the embodiments, 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 a rotation direction of each of the air inlet holes is the same as a circumferential component direction of a rotation speed of a fan blade of the axial flow fan wheel.

[0017] In one of the embodiments, the length of the air inlet hole in the circumferential direction of the air inlet grille is 4 mm to 12 mm.

[0018] In one embodiment, 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 wind wheel, and the axial air outlet and the circumferential air outlet are sequentially distributed in a direction close to the axial flow wind wheel;

[0019] The first air guide member and the second air guide member cooperate to form an axial air supply duct communicating with the axial air outlet;

[0020] The second air guide member can be opened and closed. When the second air guide member is opened, it opens the axial air supply duct, and when the second air guide member is closed, it closes the axial air supply duct.

[0021] In one of the embodiments, 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 rotation direction of each axial air outlet hole coincides with the direction of the circumferential component of the rotation speed of the fan blades of the axial flow fan wheel.

[0022] In one of the embodiments, the length of the axial air outlet hole in the circumferential direction of the axial air outlet grille is 4 mm to 12 mm.

[0023] In the air supply device as described above, the airflow generated by the axial flow wind wheel flows along the first air guide member toward the guide protrusion of the second air guide member without spreading to the surroundings of the axial flow wind wheel, thereby ensuring the air volume and speed of the airflow, and then flows along the surface of the second air guide member under the guiding effect of the guide protrusion. Since the distance between the surface through which the airflow flows and the first air guide member gradually increases in the direction away from the rotating axis of the axial flow wind wheel, the airflow flows out from the circumferential air outlet in an oblique upward direction, which not only reduces the probability of the airflow generating vortexes at the air outlet and thus reduces the loss of air volume and wind speed, but also prevents the airflow from bending downward and flowing toward the wall of the desktop under the action of the pressure difference between the upper and lower areas near the circumferential air outlet, thereby solving the problems of short air supply distance, small air supply range and small air supply speed, thereby improving the wind feel of the whole machine and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded schematic diagram of an air supply device provided in one embodiment of the present invention;

[0025] Figure 2 A cross-sectional schematic diagram of an air supply device provided in one embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of an air supply device provided in one embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the internal structure of the air supply device provided by one embodiment of the present invention in a 360-degree air supply state;

[0028] Figure 5 A top view of a lower cover provided in one embodiment of the present invention;

[0029] Figure 6 A bottom view of the top cover of the air supply device provided by one embodiment of the present invention in a 360-degree air supply state;

[0030] Figure 7 A front view of a top cover of an air supply device provided by an embodiment of the present invention in a 360-degree air supply state;

[0031] Figure 8 A bottom view of a top cover of an air supply device provided by an embodiment of the present invention in an axial air supply state;

[0032] Fig. 9 A front view of a top cover of an air supply device provided by an embodiment of the present invention in an axial air supply state;

[0033] Fig.10 A schematic diagram of the internal structure of an air supply device provided by an embodiment of the present invention in an axial air supply state;

[0034] Fig.11A schematic diagram of the structure of an air supply device provided by an embodiment of the present invention with circumferential air outlets at different heights;

[0035] Figures 12 to 17 A simulation structure diagram of airflow provided in one embodiment of the present invention flowing in the air supply devices provided in Schemes 1 to 6 in sequence.

[0036] The reference numerals in the accompanying drawings are described as follows:

[0037] 100, shell; 110, lower shell; 120, top cover; 130, column bracket; 140, closed mounting surface; 100a, air inlet; 100b, circumferential air outlet; 100c, axial air outlet; 200, second air guide member; 210, guide protrusion; 220, air guide plate; 300, first air guide member; 310, air guide chamfer structure; 400, axial flow wind wheel; 510, circumferential air outlet grille; 520, air inlet grille; 530, axial air outlet grille; 600, first driving structure; 610, motor body; 620, motor cover. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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 higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0044] Existing air supply devices, such as fans, are mostly used in desktop scenes because the 360-degree air supply mode. At this time, the fan supplies air 360 degrees in the horizontal plane, and the air inlet 100a of the fan is located at the bottom of the fan housing 100. Then, the airflow generated by the axial flow impeller 400 will be affected by the wall surface of the desktop, causing a wall jet phenomenon. Due to the limitation of the desktop wall, the flow layer close to the desktop wall is continuously sucked into the fan by the surrounding medium, which increases the fluid velocity gradient in the area. As a result, under the action of the increase in kinetic energy and friction, the static pressure in the area decreases, resulting in the pressure in the area near the air inlet 100a at the bottom of the fan being less than the pressure in the area above the air inlet 100a. Therefore, the airflow delivered by the fan in the 360-degree air supply state bends downward under the action of the upper and lower pressure differences and flows toward the desktop wall, thereby affecting the air supply direction, range, and air supply speed of the fan, and reducing the wind feeling of the whole machine and the user experience. It should be noted that the desktop refers to any working surface where the fan can be placed, not just the surface of the table, but also the ground for example.

[0045] like Figure 1and Figure 2 As shown, an embodiment of the present invention provides an air supply device, which includes: a housing 100, and a first air guide 300, a second air guide 200 and a rotatable axial flow wind wheel 400 arranged in the housing 100; Figure 3 As shown, the housing 100 has an air inlet 100a and a circumferential air outlet 100b, and the circumferential air outlet 100b is arranged around the rotating shaft of the axial flow wind wheel 400; Figure 4 As shown, the first air guide 300 is disposed around the axial flow wind wheel 400 and cooperates with the second air guide 200 to form a circumferential air supply duct that communicates with the circumferential air outlet 100b; Figure 7 As shown, when the circumferential air supply duct is opened, the portion of the second air guide 200 close to the rotating shaft of the axial flow wind wheel 400 forms a guide protrusion 210 and the distance X between the remaining portion and the first air guide 300 (see Figure 4 ) gradually increases in the direction away from the rotation axis of the axial flow wind wheel 400.

[0046] As an example, the air supply device is a fan. When used, the fan can be Figure 1 to Figure 4 The display direction shown is placed on a work surface, and the circumferential air outlet 100b of the housing 100 is circumferentially distributed on a horizontal plane and is located above the air inlet 100a. Optionally, the first air guide 300 is an air guide pipe with openings at both the 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 below the circumferential air outlet 100b.

[0047] As an example, Figure 2 As shown, the air supply device further includes: a first driving structure 600 located in the housing 100 and used to drive the axial flow wind 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 body 610 is connected to the axial flow wind wheel 400, as shown in FIG. Figure 5 As shown, the motor cover 620 is fixed to the closed mounting surface at the bottom of the housing 100 through the column bracket 130. The closed mounting surface is a curved disc surface, and the rotating shaft of the axial flow wind wheel 400 is perpendicular to the tangential surface of the closed mounting surface.

[0048] In the air supply device as described above, the airflow generated by the axial flow fan wheel 400 flows along the first air guide member 300 toward the guide protrusion 210 of the second air guide member 200, without spreading to the surroundings of the axial flow fan wheel 400, thereby ensuring the air volume and speed of the airflow, and then flows along the surface of the second air guide member 200 under the guiding effect of the guide protrusion 210. Since the distance X between the surface through which the airflow flows and the first air guide member 300 gradually increases in the direction away from the rotating axis of the axial flow fan wheel 400, the airflow flows out from the circumferential air outlet 100b in an oblique upward direction, which not only reduces the probability of the airflow generating vortex vortex at the air outlet, thereby reducing the loss of air volume and wind speed, but also prevents the airflow from bending downward and flowing toward the wall of the desktop under the pressure difference between the upper and lower areas near the circumferential air outlet 100b, thereby solving the problems of short air supply distance, small air supply range and small air supply speed, thereby improving the wind feel of the whole machine and user experience.

[0049] like Figure 7 As shown, in some embodiments of the present invention, the surface of the guide protrusion 210 is an arc surface, and the center of the arc surface is located on the rotation axis of the axial flow wind wheel 400. This can reduce the convergence and collision of the airflow flowing out along the first air guide 300 at the axis center line of the second air guide (i.e., the rotation axis of the axial flow wind wheel 400), thereby increasing the air volume of the whole machine.

[0050] like Figure 7 As shown, in some embodiments of the present invention, the guide protrusion 210 and the rest of the second air guide 200 have a smooth transition, which can reduce the loss of air volume and speed when the air flows through the second air guide 200.

[0051] In some embodiments of the present invention, the distance H between the end surface of the first air guide 300 close to the second air guide 200 and the axial flow wind wheel 400 is greater than or equal to 0 mm and less than or equal to 1 / 8 of the diameter D of the axial flow wind wheel 400. As an example, Figure 4 and Fig.10As shown, the spacing H is equal to the spacing H2 between the end face 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 spacing H1 between the hub of the axial flow wind wheel 400 and the closed mounting surface 140 at the bottom of the housing 100. The relative installation height between the axial flow wind wheel 400 and the first air guide 300 is limited, that is, the maximum size of the spacing H2 is given. At this time, the purpose of setting the optimal size is to prevent the relative installation height between the axial flow wind wheel 400 and the first air guide 300 from being too large, resulting in a too long air guide stroke along the rotating shaft direction of the axial flow wind wheel 400 during the air supply process, reducing the outlet wind speed and air supply distance in the subsequent 360-degree air supply function of the fan, and affecting the air volume of the fan; in addition, an excessively large relative installation height will cause the axial flow wind wheel 400 and the first air guide 300 to cover a large ratio, thereby increasing the interference noise inside the first air guide 300. The specific setting of the spacing H can be reasonably considered based on the overall size of the fan.

[0052] like Figure 4 and Fig.10 As shown, in some embodiments of the present invention, the spacing A between the first air guide 300 and the axial flow wind wheel 400 is greater than or equal to 1 / 50 of the diameter D of the axial flow wind wheel 400 and less than or equal to 1 / 25 of the diameter D of the axial flow wind wheel 400. The first air guide 300 plays a role in condensing the wind fluid, which can effectively reduce the air volume loss caused by the diffusion of the fluid to the surroundings during the air supply process of the axial flow impeller, thereby increasing the outlet wind speed and flow rate. Therefore, the gap between the two should not be too large, which will affect the wind duct wind gathering and guiding effect; in addition, when the axial flow impeller rotates at a high speed, the speed fluctuation of the blades of the axial flow wind wheel 400 and the turbulent boundary layer on the surface of the first air guide 300 will cause pressure fluctuations between the blades and the surface of the first air guide 300, thereby generating turbulent boundary layer noise and forming a whistling sound. Therefore, the gap between the two should not be too small. In summary, the embodiment of the present invention can achieve the purpose of increasing the air volume and outlet wind speed through the above configuration, while reducing the dynamic and static interference between the blades of the axial flow wind wheel 400 and the first wind guide 300, reducing the discrete noise of the blades, and ensuring the control of the noise level. The specific setting of the spacing A can be reasonably considered based on the overall size of the fan.

[0053] like Figure 2As shown, in some embodiments of the present invention, the port of the first air guide 300 close to the air inlet 100a is provided with an air guide chamfer structure 310. As an example, the air guide chamfer structure 310 is an arc inlet air 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 airflow entering the first air guide 300, but also effectively improve the airflow separation at the inlet of the first air guide 300, and reduce the loss of air volume of the air inlet 100a caused by the right-angle air guide chamfer structure 310; at the same time, the arc inlet air guide ring can reduce the reflection surface during the fluid flow process, reduce the turbulence of the incoming flow, and reduce the radial vortex noise when the air flows into the first air guide 300, thereby achieving the effect of noise reduction of the whole machine.

[0054] like Figure 4 and Fig.10 As shown, in some embodiments of the present invention, the length B of the circumferential air outlet 100b in the rotation axis direction of the axial flow wind wheel 400 is greater than or equal to 17 mm and less than or equal to 1 / 8 of the diameter D of the axial flow wind wheel 400 . Since the 360-degree air supply mode of the fan is jet flow, during the air supply process, the fluid leaves the original restricted environment and continues to flow and diffuse in the space. According to the jet characteristics, the jet core area and the external static gas area will exchange momentum and mass during the fluid injection process. The air volume increases in this process, but the wind speed is severely attenuated. In order to solve this problem, the embodiment of the present invention takes into account the following relationship between the jet wind speed and air volume flowing out through the circumferential air outlet 100b and the height of the circumferential air outlet 100b (that is, the length B of the circumferential air outlet 100b in the direction of the rotation axis of the axial flow wind wheel 400): a larger height of the circumferential air outlet 100b will increase the air volume of the whole machine, but will cause the wind speed to decrease. An excessively small height of the circumferential air outlet 100b will cause the wind speed and air volume to decrease at the same time. The length of the circumferential air outlet 100b in the direction of the rotation axis of the axial flow wind wheel 400 is reasonably set, which can ensure that the wind speed reaches the optimal level when the air volume is sufficient. The following is a simulation analysis of the scheme of the air supply device with 6 groups of circumferential air outlets 100b of different lengths B. Figures 12 to 17 As shown in Table 1, the air supply device provided by Scheme 3 achieves the optimal wind speed while ensuring sufficient air volume (see Fig.14 ).

[0055] Table 1

[0056] plan <![CDATA[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

[0057] In some embodiments of the present invention, Figure 8 As shown, the maximum diameter D2 of the circumferential air outlet 100b is larger than the diameter D of the axial flow wind wheel 400. This prevents the circumferential air outlet 100b from being too small in diameter, which may cause the turbulence of the fluid inside the first air guide 300, resulting in reduced air volume, noise, poor sound quality, and other problems.

[0058] like Figure 2 As shown, in some embodiments of the present invention, a circumferential air outlet grille 510 is provided at the circumferential air outlet 100b, and the circumferential air outlet grille 510 is provided with a plurality of windshields at intervals along its own circumference, and the edge inclination direction of the windshield is the same as the spiral shear direction (i.e., the direction tangent to the rotation direction) of the fluid generated by the rotation of the axial flow wind wheel 400. In this way, the reflection area between the airflow at the circumferential air outlet 100b and the circumferential air outlet grille 510 can be reduced, and the dynamic and static interference between the circumferential air outlet grille 510 and the axial flow wind wheel 400 can be reduced, so as to achieve the purpose of noise reduction, and increase the wind pressure at the circumferential air outlet 100b, thereby improving the problem of fast attenuation of the free jet wind speed, further increasing the wind speed and air supply distance of the circumferential air outlet 100b, and improving the wind feeling.

[0059] Optionally, a plurality of circumferential air outlet holes are provided on the circumferential air outlet grille 510, and the circumferential air outlet holes are arranged along the circumference of the circumferential air outlet grille 510 (refer to Figure 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 loss of the wind speed and air volume of the circumferential air outlet holes caused by the circumferential air outlet grille 510 can be reduced to a large extent.

[0060] As an example, Figure 1 and Figure 2 As shown, the housing 100 includes: a lower housing 110 and a top cover 120 that can be covered on the lower housing 110. The air inlet 100a is opened at the bottom of the lower housing 110 (see Figure 3 ); The circumferential air outlet grille 510 is connected between the lower shell 110 and the top cover 120.

[0061] like Figure 2 As shown, in some embodiments of the present invention, an air inlet grille 520 is provided at the air inlet 100a, and a plurality of air inlet holes on the air inlet grille 520 are radially distributed, and the rotation direction of each air inlet hole is the same as the component direction of the rotation speed of the fan blades of the axial flow fan wheel 400 in the circumferential direction. In this way, not only the radial inflow at the fan air inlet hole is increased, thereby increasing the effective inflow area of ​​the fan, which is conducive to increasing the flow rate, but also the consistency of the flow direction of the fluid in the air inlet hole and the flow direction of the air flow generated by the rotation of the fan blades of the axial flow fan wheel 400 can be ensured, and the sudden change of the air flow when the air flow enters the air inlet grille 520 is reduced, and the uniformity of the air flow is better ensured, thereby reducing the aerodynamic noise caused by turbulence. It should be noted that the air inlet hole refers to the gap between two adjacent grille plates on the air inlet grille 520. Optionally, the plurality of air inlet holes can be radially spirally distributed or radially arc-shaped distributed. Optionally, the length of the air inlet hole in the circumferential direction of the air inlet grille 520 is 4mm to 12mm (for example, 4mm, 8mm, 12mm, etc.). Optionally, the air inlet grille 520 is integrally formed on the bottom of the lower shell 110 .

[0062] In some embodiments of the present invention, Figure 3 As shown, the housing 100 also has an axial air outlet 100c, the length direction of the axial air outlet 100c is the same as the direction of the rotating shaft of the axial flow wind wheel 400, and the axial air outlet 100c and the circumferential air outlet 100b are sequentially distributed along the direction close to the axial flow wind wheel 400; the first air guide 300 and the second air guide 200 also cooperate to form an axial air supply duct that communicates with the axial air outlet 100c; the second air guide 200 can be opened and closed, and the second air guide 200 opens the axial air supply duct when opened, and closes the axial air supply duct when closed. It should be noted that when the second air guide 200 is opened, since the airflow generated by the axial flow wind wheel 400 is distributed along the rotating shaft direction of the axial flow wind wheel 400, most of the airflow generated by the axial flow wind wheel 400 flows to the axial air outlet 100c, and only a very small part flows to the circumferential air outlet 100b. At this time, the circumferential air supply duct can be regarded as being in a closed state. By controlling the opening and closing of the second air guide 200, the air supply mode of the air supply device can be adjusted. Figure 4 The 360-degree air supply pattern shown and Fig.10 The axial air supply mode shown. It should be noted that Figure 4 and Fig.10 The arrows shown in the figure represent the direction of air flow. Optionally, the air supply device further comprises: a base, and the housing 100 is rotatably disposed on the base. When the air supply device is in an axial air supply mode, 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, and air is supplied to the user.

[0063] As an example, Figures 6 to 9As shown, the second air guide 200 includes a plurality of air guide plates 220 radially distributed with the rotating shaft of the axial flow wind wheel 400 as the center, and the air guide plates 220 include: a first guide portion and a second guide portion; the first guide portion has a first rotating shaft at one end away from the rotating shaft of the axial flow wind wheel 400, and the first guide portion has a second rotating shaft at one end close to the rotating shaft of the axial flow wind wheel 400 and is also connected to the second guide portion; the first guide portion can rotate in the housing 100 through the first rotating shaft and the second rotating shaft to realize the closing of the second air guide 200; the second guide portions of the plurality of air guide plates 220 can cooperate to form the guide protrusion 210. The air guide plates 220 can be rotated manually to realize the opening and closing of the second air guide 200, and the opening and closing of the second air guide 200 can also be driven by the relevant second driving structure. For example, 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 meshes with the driven wheel; when the driving wheel rotates, the driven wheel can be driven to rotate, thereby driving the air guide plate 220 to rotate. Among them, the upper opening of the air supply device can 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 mode of the air supply device by controlling the first driving structure 600 and the second driving structure. In this way, the degree of automation of the air supply device can be improved, and the user experience can be improved.

[0064] In some embodiments of the present invention, Figure 2 As shown, an axial air outlet grille 530 is provided at the axial air outlet 100c, and a plurality of axial air outlet holes on the axial air outlet grille 530 are radially distributed, and the rotation direction of each axial air outlet hole coincides with the circumferential component direction of the rotation speed of the fan blades of the axial flow wind wheel 400. In this way, the consistency of the flow direction of the fluid in the axial air outlet hole and the flow direction of the airflow generated by the rotation of the fan blades of the axial flow wind wheel 400 can be ensured, and the sudden change of the airflow when the airflow flows out of the axial air outlet grille 530 is reduced, and the uniformity of the airflow is better guaranteed, thereby reducing the aerodynamic noise caused by turbulence. It should be noted that the axial air outlet hole refers to the gap between two adjacent grille plates on the axial air outlet grille 530. Optionally, the plurality of axial air outlet holes can be radially distributed in an arc shape. Optionally, the length of the axial air outlet hole in the axial direction of the axial air outlet grille 530 is 4mm to 12mm (for example, 4mm, 8mm, 12mm, etc.). Optionally, the axial air outlet grille 530 is integrally formed on the top cover 120 of the housing 100.

[0065] In some embodiments of the present invention, 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 impeller are reduced in sequence. In this way, it is possible to prevent the problems of reduced air volume, noise, and poor sound quality caused by the internal fluid turbulence of the first air guide 300 due to the small diameter of the axial air outlet 100c, and to improve the side air leakage phenomenon when the first air guide 300 is in the axial air supply state, thereby ensuring the efficiency of the axial air supply.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air supply device, characterized in that: The invention comprises: a shell, and a first air guide member, a second air guide member and a rotatable axial flow wind wheel arranged in the shell; The shell has an air inlet and a circumferential air outlet, the air inlet is located at the bottom of the shell, and the circumferential air outlet is arranged around the rotating shaft of the axial flow wind wheel; The first air guide member is disposed around the axial flow wind wheel and cooperates with the second air guide member to form a circumferential air supply duct communicating with the circumferential air outlet; When the circumferential air supply duct is opened, a guide protrusion is formed at a portion of the second air guide member close to the rotating shaft of the axial flow wind wheel, and a distance X between the remaining portion and the first air guide member gradually increases in a direction away from the rotating shaft of the axial flow wind wheel, so that the airflow flows out from the circumferential air outlet in an oblique upward direction.

2. The air supply device according to claim 1, characterized in that: The surface of the guide protrusion is an arc surface, and the center of the arc surface is located on the rotating shaft of the axial flow wind wheel.

3. The air supply device according to claim 1, characterized in that: The guide protrusion and the rest of the second air guide member have a smooth transition.

4. The air supply device according to claim 1, characterized in that: A distance H between an end surface of the first air guide member close to the second air guide member and the axial flow wind wheel is greater than or equal to 0 mm and less than or equal to 1 / 8 of a diameter D of the axial flow wind wheel.

5. The air supply device according to claim 1, characterized in that: A distance A between the first air guide and the axial flow wind wheel is greater than or equal to 1 / 50 of a diameter D of the axial flow wind wheel and less than or equal to 1 / 25 of the diameter D of the axial flow wind wheel.

6. The air supply device according to claim 1, characterized in that: The 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, characterized in that: A length B of the circumferential air outlet in the direction of the rotation axis of the axial flow wind wheel is greater than or equal to 17 mm and less than or equal to 1 / 8 of a diameter D of the axial flow wind wheel.

8. The air supply device according to claim 1, characterized in that: 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 shielding parts at intervals along its circumference, and the inclination direction of the edge of the wind shielding part is the same as the rotary shear direction of the fluid generated by the rotation of the axial flow wind wheel.

9. The air supply device according to claim 1, characterized in that: A circumferential air outlet grille is provided at the circumferential air outlet, and a plurality of circumferential air outlet holes are provided on the circumferential air outlet grille. The circumferential air outlet holes extend along the circumference of the circumferential air outlet grille.

10. The air supply device according to claim 1, characterized in that: 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 the direction of the component of the rotation speed of the fan blades of the axial flow fan wheel in the circumferential direction.

11. The air supply device according to claim 10, characterized in that: The length of the air inlet hole in the circumferential direction of the air inlet grille is 4 mm to 12 mm.

12. The air supply device according to any one of claims 1 to 11, characterized in that: The housing is also provided with 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 wind wheel, and the axial air outlet and the circumferential air outlet are sequentially distributed in a direction close to the axial flow wind wheel; The first air guide member and the second air guide member cooperate to form an axial air supply duct communicating with the axial air outlet; The second air guide member can be opened and closed. When the second air guide member is opened, it opens the axial air supply duct, and when the second air guide member is closed, it closes the axial air supply duct.

13. The air supply device according to claim 12, characterized in that: 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 rotation direction of each axial air outlet hole coincides with the circumferential component direction of the rotation speed of the fan blades of the axial flow fan wheel.

14. The air supply device according to claim 13, characterized in that: The length of the axial air outlet hole in the circumferential direction of the axial air outlet grille is 4 mm to 12 mm.

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