Fan and fan control method

Abstract

The invention discloses a fan and a control method of the fan, and the fan comprises a driving fan which comprises a plurality of blades; the adjustable air duct piece is located on the air outlet side of the driving fan, the adjustable air duct piece has a first air outlet state and a second air outlet state, and the opening area of an adjustable air outlet of the adjustable air duct piece in the first air outlet state is smaller than the opening area of the adjustable air outlet in the second air outlet state; on the first projection face, the orthographic projection of the air inlet end of the adjustable air duct piece covers the circle where the blade tips of the multiple blades are located. Therefore, on the first projection surface, the orthographic projection of the air inlet end of the adjustable air channel piece covers the circle where the blade tips of the multiple blades are located, airflow generated by the blades can completely flow into the adjustable air channel piece, the utilization rate of the airflow is increased, and the flowing range of the airflow is enlarged; the opening area of the adjustable air duct piece is adjustable, so that the air outlet range and the air outlet feeling of the fan are adjusted, and the use experience feeling of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household electrical appliances, and in particular to a fan and a method for controlling the fan. Background Art

[0002] As people's living standards continue to improve, consumers' requirements for fans are also getting higher and higher.

[0003] In the related art, the internal structure of the fan is not arranged reasonably, resulting in a small air output of the fan and a small difference in the wind feeling of the air output, which cannot meet the user's usage needs and affects the user's usage experience. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a fan having a large air output and a large difference in air output feeling.

[0005] A fan comprises: a driving fan, the driving fan comprising a plurality of blades; an adjustable duct member, the adjustable duct member being located at an air outlet side of the driving fan, the adjustable duct member having a first air outlet state and a second air outlet state, the opening area of ​​the adjustable air outlet of the adjustable duct member in the first air outlet state being smaller than the opening area in the second air outlet state; on a first projection plane, the orthographic projection of the air inlet end of the adjustable duct member covers a circle where the blade tips of the plurality of blades are located, and the first projection plane is perpendicular to the rotation centerline of the driving fan.

[0006] According to the fan of the present invention, on the first projection plane, by making the positive projection of the air inlet end of the adjustable air duct component cover the circle where the blade tips of multiple blades are located, it is beneficial to allow the airflow generated by the blades to flow into the adjustable air duct component completely, thereby improving the utilization rate of the airflow, thereby improving the air output power of the fan and increasing the flow range of the airflow; in addition, by providing the adjustable air duct component, the user can adjust the opening area of ​​the adjustable air duct component according to actual usage requirements, thereby adjusting the air outlet range and air outlet feeling of the fan, which is beneficial to meeting the user's usage requirements and improving the user's usage experience.

[0007] According to some embodiments of the present invention, in the first air outlet state, a cross-sectional area of ​​the adjustable air duct member gradually decreases in a direction toward the adjustable air outlet.

[0008] According to some embodiments of the present invention, in the second air outlet state, a cross-sectional area of ​​the adjustable air duct member gradually increases in a direction toward the adjustable air outlet.

[0009] According to some embodiments of the present invention, the adjustable air duct member includes a plurality of adjustment plates arranged at intervals along the circumferential direction, and each of the adjustment plates is rotatable to switch the adjustable air duct member between the first air outlet state and the second air outlet state.

[0010] According to some embodiments of the present invention, adjacent adjustment sheets are partially overlapped in the circumferential direction.

[0011] According to some embodiments of the present invention, each of the adjustment sheets is formed as an arc-shaped plate.

[0012] According to some embodiments of the present invention, the fan further includes an air guide bracket, wherein the air guide bracket is disposed between the driving fan and the adjustable air duct member, the air guide bracket is provided with an air guide duct, and at least a portion of each of the blades is located in the air guide duct.

[0013] According to some embodiments of the present invention, the fan further includes: a housing, in which the driving fan and the adjustable air duct member are disposed; and a front mesh cover, which is disposed in the housing and located on the air outlet side of the adjustable air duct member.

[0014] According to some embodiments of the present invention, the front mesh cover includes a plurality of circles of air outlet areas, and the plurality of circles of air outlet areas are sequentially arranged along the radial direction.

[0015] According to some embodiments of the present invention, in the first air outlet state, the number of the air outlet areas that the adjustable air duct member faces is smaller than the number of the air outlet areas corresponding to the second air outlet state.

[0016] According to some embodiments of the present invention, the multi-circle air outlet area includes an outermost circle air outlet area and at least one inner circle air outlet area, and the air guide ribs of the outermost circle air outlet area are formed as straight line ribs; the air guide ribs of each of the inner circle air outlet areas are formed as arc-shaped ribs; in the second air outlet state, the adjustable air outlet is arranged opposite to the outermost circle air outlet area and each of the inner circle air outlet areas; in the first air outlet state, the adjustable air outlet is arranged opposite to at least one of the inner circle air outlet areas.

[0017] According to some embodiments of the present invention, in the axial direction away from the adjustable air duct member, the air outlet end of the linear rib extends obliquely outward in a direction away from the rotation centerline of the driving fan.

[0018] According to some embodiments of the present invention, the inclination angle of the linear rib relative to the rotation center line ranges from 20° to 40°.

[0019] According to some embodiments of the present invention, in the second air outlet state, in the direction toward the adjustable air outlet, a longitudinal section of the adjustable air duct member extends obliquely outward in a direction away from a rotation centerline of the driving fan.

[0020] According to some embodiments of the present invention, the front mesh cover is detachably provided on the housing.

[0021] Another object of the present invention is to provide a method for controlling a fan.

[0022] A method for controlling a fan, wherein the fan is the above-mentioned fan, and the control method comprises: controlling the adjustable air duct member to switch between the first air outlet state and the second air outlet state; in the first air outlet state and the second air outlet state, controlling the driving fan to operate, the multiple blades rotate to supply air toward the adjustable air duct member, and the adjustable air duct member guides the airflow to the adjustable air outlet.

[0023] The control method of the fan has the same advantages as those of the above-mentioned fan, which will not be described in detail here.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 A schematic diagram of the structure of a fan according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 Sectional view at AA in the middle;

[0028] Figure 3 Schematic diagram of the assembly of the adjustable air duct member and the air duct bracket according to the embodiment of the present invention Figure 1 , the adjustable air duct component is in the first air outlet state;

[0029] Figure 4 Schematic diagram of the assembly of the adjustable air duct member and the air duct bracket according to the embodiment of the present invention Figure 2 , the adjustable air duct component is in the first air outlet state;

[0030] Figure 5 Schematic diagram of the assembly of the adjustable air duct member and the air duct bracket according to the embodiment of the present invention Figure 3 , the adjustable air duct member is in the second air outlet state;

[0031] Figure 6Schematic diagram of the assembly of the adjustable air duct member and the air duct bracket according to the embodiment of the present invention Figure 4 , the adjustable air duct member is in the second air outlet state;

[0032] Figure 7 It is a schematic structural diagram of the front grille according to an embodiment of the present invention;

[0033] Figure 8 It is a streamline diagram of simulation analysis of airflow when the adjustable air duct member according to the embodiment of the present invention is in the first air outlet state, when the fan is not provided with a front mesh cover and when the fan is provided with a front mesh cover, wherein A is when the fan is not provided with a front mesh cover, and B is when the fan is provided with a front mesh cover;

[0034] Fig. 9 It is a simulation analysis velocity cloud diagram of airflow when the adjustable air duct member according to the embodiment of the present invention is in the first air outlet state, when the fan is not provided with a front mesh cover and when the fan is provided with a front mesh cover, wherein C is when the fan is not provided with a front mesh cover, and D is when the fan is provided with a front mesh cover;

[0035] Fig.10 It is a streamline diagram of simulation analysis of airflow when the adjustable air duct member according to the embodiment of the present invention is in the second air outlet state, when the fan is not provided with a front mesh cover and when the fan is provided with a front mesh cover, wherein E is when the fan is not provided with a front mesh cover, and F is when the fan is provided with a front mesh cover;

[0036] Fig.11 It is a simulation analysis velocity cloud diagram of airflow when the adjustable air duct member according to the embodiment of the present invention is in the second air outlet state, when the fan is not provided with a front mesh cover and when the fan is provided with a front mesh cover, wherein G is when the fan is not provided with a front mesh cover, and H is when the fan is provided with a front mesh cover;

[0037] Fig.12 This is a simulation diagram of an axial flow fan blade in which the blade structure described in an embodiment of the present invention is a blade;

[0038] Fig.13 A schematic diagram of the structure of the regulating piece according to an embodiment of the present invention provided with a guide portion and a rotating connection portion;

[0039] Fig.14 It is a structural schematic diagram of an adjusting piece provided with a pushing portion according to an embodiment of the present invention;

[0040] Fig.15 The figure is a flow chart of a fan control method according to an embodiment of the present invention.

[0041] Reference numerals:

[0042] Fan 100, driving fan 110, blade 111, blade tip 1111,

[0043] Adjustable air duct 120, adjustable air outlet 121, air inlet 122,

[0044] The adjusting piece 123, the first adjusting piece 1231, the second adjusting piece 1232, the third adjusting piece 1233, the guide part 1234, the rotating connecting part 1235, the pushing part 1236, the main adjusting piece 1237, the slave adjusting piece 1238,

[0045] The air guide bracket 130, the air guide duct 131,

[0046] The housing 140, the front grille 150, the air outlet area 151, the outermost air outlet area 1511, the inner air outlet area 1512, the air guide ribs 152, the straight ribs 1521, the arc ribs 1522,

[0047] Air duct bracket 160, moving parts 170,

[0048] Drive motor 180. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "front", "axial", "radial", "circumferential", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Reference below Figure 1-Figure 14 A fan 100 according to an embodiment of the present invention is described.

[0053] Combination Figures 2 to 6 According to the present invention, the fan 100 includes: a driving fan 110 and an adjustable duct member 120, the driving fan 110 includes a plurality of blades 111, the adjustable duct member 120 is located at the air outlet side of the driving fan 110, the adjustable duct member 120 has a first air outlet state and a second air outlet state, and the opening area of ​​the adjustable air outlet 121 of the adjustable duct member 120 in the first air outlet state is smaller than the opening area in the second air outlet state; on the first projection plane, the orthographic projection of the air inlet end 122 of the adjustable duct member 120 covers the circle where the blade tips 1111 of the plurality of blades 111 are located, and the first projection plane is perpendicular to the rotation center line of the driving fan 110.

[0054] Specifically, the plurality of blades 111 are arranged in sequence along the circumferential direction. When the fan 110 is driven to work, the plurality of blades 111 can be driven to rotate. During the rotation process, the blades 111 drive the surrounding gas to flow, thereby forming gas with a certain flow rate.

[0055] It should be noted that the “first projection plane” may be understood as a projection plane in the front-to-back direction or the thickness direction of the fan 100 .

[0056] Further integration Figure 2 and Figure 6 One end of the adjustable duct member 120 close to the driving fan 110 in the axial direction is constructed as an air inlet end 122 of the adjustable duct member 120. The airflow generated by the rotation of the blades 111 can flow into the adjustable duct member 120 through the air inlet end 122. On the first projection plane, the orthographic projection of the air inlet end 122 of the adjustable duct member 120 can be arranged around the outer circumference of the circle where the blade tips 1111 of the multiple blades 111 are located, or the orthographic projection of the air inlet end 122 of the adjustable duct member 120 just coincides with the above-mentioned circle, which is conducive to making the airflow generated by the blades 111 all blown into the adjustable duct member 120, preventing the airflow from diverging inside the fan 100, and can effectively concentrate the airflow, which is conducive to increasing the flow range of the airflow.

[0057] It should be noted that, in the radial direction, the position where the blade 111 is farthest from the hub of the driving fan 110 is defined as the blade tip 1111 of the blade 111 .

[0058] In the present application, “on the first projection plane, the orthographic projection of the air inlet end 122 of the adjustable air duct member 120 covers the circle where the blade tips 1111 of the plurality of blades 111 are located” may mean that the edge of the orthographic projection of the air inlet end 122 just coincides with the above-mentioned circle, or may mean that the edge of the orthographic projection of the air inlet end 122 is located outside the above-mentioned circle (that is, the above-mentioned circle falls within the orthographic projection of the air inlet end 122).

[0059] In the related art, the arrangement of the fan blades and the air guide is unreasonable, which causes part of the airflow generated by the fan blades to be unable to flow out through the air guide, but to dissipate inside the fan, resulting in low air flow utilization, thereby causing low fan output power, affecting the user experience.

[0060] In the present application, by making the area of ​​the air inlet end 122 of the adjustable air duct component 120 greater than or equal to the area of ​​the circle where the multiple blades 111 are located, on the first projection plane, the orthographic projection of the air inlet end 122 of the adjustable air duct component 120 covers the circle where the blade tips 1111 of the multiple blades 111 are located, which is beneficial for allowing the airflow generated by the blades 111 to flow into the adjustable air duct component 120 and flow out through the adjustable air duct component 120, thereby improving the utilization rate of the airflow, thereby improving the air output power of the fan 100 and increasing the flow range of the airflow.

[0061] Preferably, the blades 111 are axial flow blades, and the blades 111 extend in the radial direction. When the plurality of blades 111 rotate, Fig.12 The air on the side of the blade 111 away from the adjustable air duct member 120 is driven to flow toward the adjustable air duct member 120 to form an airflow. When the airflow flows through the blade 111, the blade 111 can guide the airflow to form an oblique airflow. At this time, the airflow has a speed in the axial direction and a speed in the circumferential direction. It can also be understood that part of the airflow flows in the axial direction and the other part of the airflow flows in the circumferential direction.

[0062] Further integration Figures 3 to 6 The adjustable duct member 120 can guide the airflow, and the opening area of ​​the adjustable air outlet 121 of the adjustable duct member 120 can be adjusted so as to adjust the flow range and strength of the airflow through the opening area. When the adjustable duct member 120 is in the first state, the opening area of ​​the adjustable air outlet 121 is small, and the adjustable duct member 120 can regularize the airflow flowing therein. The inner wall of the adjustable duct member 120 can guide the airflow so that the airflow flowing in the circumferential direction is adjusted to flow in the axial direction, so that the airflow flowing out of the adjustable duct member 120 is more concentrated in the radial direction, the airflow is stronger, and the flow distance of the airflow in the axial direction is longer. At this time, the adjustable duct member 120 is in a wind gathering state.

[0063] When the adjustable duct component 120 is in the second state, the opening area of ​​the adjustable air outlet 121 is large, and the inner wall of the adjustable duct component 120 has little interference with the part of the airflow flowing along the circumferential direction. When the airflow flows out from the adjustable duct component 120, a part of the airflow can still be kept flowing along the circumferential direction. The airflow flowing out from the adjustable duct component 120 is more divergent in the radial direction, and the airflow is soft. At this time, the adjustable duct component 120 is in a dispersed wind state. The user can adjust the air outlet area of ​​the adjustable air outlet 121 according to actual usage needs, so as to adjust the strength of the airflow and the flow distance in the axial direction, which is conducive to meeting the different usage needs of users and improving the user's usage experience.

[0064] In the related art, the air speed of the fan is usually adjusted by adjusting the speed of the motor, but the blowing range of the fan cannot be adjusted. At the same time, the difference in the air feel of the fan is small, which cannot meet the usage needs of different users.

[0065] The present application sets an adjustable duct member 120 and adjusts the opening area of ​​the adjustable air outlet 121 of the adjustable duct member 120 to adjust the flow range and strength of the airflow. When the opening area is small (i.e. the adjustable duct member 120 is in the first air outlet state), the airflow is stronger and the flow distance of the airflow in the air outlet direction is longer. When the opening area is large (i.e. the adjustable duct member 120 is in the second air outlet state), the airflow is softer and the flow distance of the airflow in the air outlet direction is short. Therefore, the user can adjust the air outlet range and air outlet feeling of the fan 100 according to usage requirements, which is conducive to meeting the usage requirements of different users and improving the user experience.

[0066] In addition, in the related art, fans usually use cross-flow blades or centrifugal blades, and fans usually have circumferential air intake or circumferential air outlet. After the airflow passes through the internal air duct, its flow direction is basically directional. The present application constructs the blades 111 as axial flow blades so that the airflow flowing into the adjustable air duct component 120 has both axial speed and circumferential speed. The inner wall of the adjustable air duct component 120 can adjust the circumferential speed of the airflow, thereby adjusting the air outlet range and air outlet feeling of the fan 100, so as to effectively ensure that the characteristics of the airflow flow are adapted to the adjustment effect of the adjustable air duct component 120 on the airflow.

[0067] According to the fan 100 of the present invention, on the first projection plane, by making the positive projection of the air inlet end 122 of the adjustable air duct component 120 cover the circle where the blade tips 1111 of the plurality of blades 111 are located, it is beneficial to allow the airflow generated by the blades 111 to flow completely into the adjustable air duct component 120, thereby improving the utilization rate of the airflow, thereby improving the air output power of the fan 100 and increasing the flow range of the airflow. In addition, by providing the adjustable air duct component 120, the user can adjust the opening area of ​​the adjustable air duct component 120 according to actual usage requirements, thereby adjusting the air outlet range and air outlet feeling of the fan 100, meeting the user's usage requirements and improving the user's usage experience.

[0068] It should be noted that the fan 100 may be a desktop fan or a portable handheld fan; the fan 100 may also be a floor-standing fan placed on the ground through a bracket.

[0069] Combination Figure 3 and Figure 4 In some embodiments of the present invention, in the first air outlet state, the cross-sectional area of ​​the adjustable air duct member 120 gradually decreases in the direction toward the adjustable air outlet 121 .

[0070] Specifically, in the first air outlet state, along the direction in which the driving fan 110 extends toward the adjustable air outlet 121, the distance between the inner wall surface of the adjustable air duct member 120 and its central axis gradually decreases, so that the adjustable air duct member 120 gradually shrinks and moves closer to its central axis to guide the airflow to gradually concentrate. Under the condition that the power of the driving fan 110 is constant (that is, the air volume is constant), the flow distance of the airflow in the air outlet direction can be increased, and the intensity of the airflow can be enhanced to make the airflow stronger to meet the user's usage needs.

[0071] It should be noted that the “inner wall surface” refers to a side wall surface of the adjustable air duct member 120 close to the central axis thereof in the radial direction.

[0072] Combination Figure 5 and Figure 6 In some embodiments of the present invention, in the second air outlet state, the cross-sectional area of ​​the adjustable air duct member 120 gradually increases in the direction toward the adjustable air outlet 121 .

[0073] Specifically, in the second air outlet state, along the direction in which the driving fan 110 extends toward the adjustable air outlet 121, the distance between the inner wall surface of the adjustable air duct member 120 and its central axis gradually increases, so that the cross-sectional area of ​​the adjustable air duct member 120 gradually increases to guide the airflow to gradually diverge. Under the condition that the power of the driving fan 110 is constant (that is, the air volume is constant), the flow range of the airflow in the radial direction can be increased, and the intensity of the airflow can be reduced, making the airflow softer to meet the user's usage needs.

[0074] In other embodiments of the present invention, in the first air outlet state, along the direction in which the driving fan 110 extends toward the adjustable air outlet 121, the distance between the inner wall surface of the adjustable air duct member 120 and its central axis remains constant, and the adjustable air duct member 120 can play a role in guiding the airflow to concentrate, so as to enhance the strength of the airflow and make the airflow stronger; in the second air outlet state, along the direction in which the driving fan 110 extends toward the adjustable air outlet 121, the distance between the inner wall surface of the adjustable air duct member 120 and its central axis gradually increases, so as to guide the airflow to gradually diverge, reduce the strength of the airflow, and make the airflow softer.

[0075] Optionally, in the first air outlet state, along the direction in which the driving fan 110 extends toward the adjustable air outlet 121, the distance between the inner wall surface of the adjustable air duct member 120 and its central axis gradually decreases, so that the adjustable air duct member 120 gradually shrinks and moves closer to its central axis to guide the airflow to gradually concentrate and enhance the air outlet intensity; in the second air outlet state, along the direction in which the driving fan 110 extends toward the adjustable air outlet 121, the distance between the inner wall surface of the adjustable air duct member 120 and its central axis remains constant, and in the second state, the area of ​​the adjustable air outlet 121 is larger than the area of ​​the adjustable air outlet 121 in the first state. Compared with the first state, the adjustable air duct member 120 in the second state can guide the airflow to diverge, reduce the air outlet intensity, and make the airflow softer.

[0076] Of course, it is understandable that the specific arrangement of the adjustable air duct member 120 is not limited here, as long as the opening area of ​​the adjustable air outlet 121 can be variable and the air outlet intensity and air outlet range can be adjusted.

[0077] Combination Figures 3 to 6 In some embodiments of the present invention, the fan 100 further includes an air duct support 160 and a moving part 170 , the adjustable air duct part 120 is disposed on the air duct support 160 , and the adjustable air duct part 120 is connected to the air duct support 160 via the moving part 170 .

[0078] Specifically, combined Figure 2 The air duct support 160 can be constructed in a ring shape, and the air duct support 160 forms an air duct cavity, and the two ends of the air duct cavity are open in the axial direction. The driving fan 110 is located on one side of the air duct support 160 in the axial direction, and the adjustable air duct member 120 is arranged on the air duct support 160 and is located on the other side of the air duct support 160 in the axial direction. The airflow generated by the driving fan 110 can flow into the adjustable air duct member 120 through the air duct cavity.

[0079] Furthermore, a moving part 170 is provided on the air duct bracket 160, and the air inlet end 122 of the adjustable air duct member 120 is connected to the air duct bracket 160 through the moving part 170. The moving part 170 can drive the adjustable air duct member 120 to move to adjust the cross-sectional area of ​​the adjustable air duct member 120, thereby adjusting the opening area of ​​the adjustable air outlet 121, and then the air outlet state of the fan 100 can be adjusted.

[0080] Among them, a driving device is arranged inside the fan 100, and the driving device is transmission-connected with the moving part 170 to drive the moving part 170 to move, so that the moving part 170 can drive the adjusting plate 123 to move. Optionally, the driving device can be configured as a motor, and the moving part 170 can be configured as a rotating shaft. The driving device outputs power to drive the rotating shaft to rotate, and the rotating shaft drives the adjusting plate 123 to rotate, so as to adjust the opening area of ​​the adjustable air outlet 121; of course, it can be understood that the moving part 170 can also be configured as other structures, as long as it drives the adjusting plate 123 to move, and the specific structure is not limited here.

[0081] Combination Figures 3 to 6 In some embodiments of the present invention, the adjustable duct member 120 includes a plurality of adjustment plates 123 spaced apart along the circumferential direction, and each adjustment plate 123 is rotatable to switch the adjustable duct member 120 between a first air outlet state and a second air outlet state.

[0082] It should be noted that the end of the adjusting sheet 123 close to the air duct bracket 160 in the axial direction is defined as the inner end of the adjusting sheet 123, and the end of the adjusting sheet 123 away from the air duct bracket 160 in the axial direction is defined as the outer end of the adjusting sheet 123, and the outer end of the adjusting sheet 123 is the outer side of the adjustable air duct component 120, and the inner end of the adjusting sheet 123 is the inner side of the adjustable air duct component 120. In addition, the outer side of the adjustable air duct component 120 forms an adjustable air outlet 121.

[0083] Specifically, there are multiple adjusting pieces 123, and the moving parts 170 can be arranged one by one corresponding to the adjusting pieces 123. The inner end of each adjusting piece 123 can be connected to the air duct bracket 160 through the moving part 170. The moving part 170 can drive the adjusting piece 123 to rotate relative to the air duct bracket 160 (it can also be understood that the moving part 170 drives the adjusting piece 123 to swing relative to the air duct bracket 160), so that the outer end of each adjusting piece 123 can move toward or away from the central axis of the adjustable air duct component 120, thereby realizing the contraction or expansion of the adjustable air outlet 121, so as to reduce or increase the opening area of ​​the adjustable air outlet 121, so that the adjustable air duct component 120 can switch between the first air outlet state and the second air outlet state.

[0084] It can be understood that when the moving member 170 drives the adjusting piece 123 to rotate its outer end toward the direction close to the central axis of the adjustable air duct member 120, the multiple adjusting pieces 123 shrink inward, and the multiple adjusting pieces 123 can regulate the airflow to convert the circumferential velocity of the airflow into the axial velocity, that is, the adjusting piece 123 adjusts part of the airflow flowing in the circumferential direction to flow in the axial direction, and the adjustable air duct member 120 is in the first air outlet state, in which the adjustable air outlet 121 shrinks, and the opening area of ​​the adjustable air outlet 121 is small. When the airflow is discharged from the adjustable air duct member 120, the airflow is guided by the adjusting piece 123. , making the airflow flow in the axial direction, so that the wind intensity is large and the wind feeling is strong; when the moving part 170 drives the adjusting piece 123 to rotate its outer end in the direction away from the central axis of the adjustable air duct part 120, the multiple adjusting pieces 123 expand outward, wherein the multiple adjusting pieces 123 have little interference with the partial airflow flowing in the circumferential direction, and the adjustable air duct part 120 is in the second air outlet state, in which the adjustable air outlet 121 expands, and the opening area of ​​the adjustable air outlet 121 increases, and when the airflow is discharged from the adjustable air duct part 120, the airflow can still maintain a certain circumferential speed, so that the air outlet area is large and the air outlet is soft.

[0085] In other embodiments of the present invention, the adjustable air duct member 120 is an integrally formed flexible member, and the outer side of the adjustable air duct member 120 can be deformed by pressing so that the outer side of the adjustable air duct member 120 moves toward or away from its central axis, thereby adjusting the opening area of ​​the adjustable air outlet 121, so that the adjustable air duct member 120 can be switched between a first air outlet state and a second air outlet state.

[0086] In addition, when the adjustable air duct member 120 is constructed as an integrally formed flexible member, the number of components of the fan 100 can be reduced, the assembly of the fan 100 is facilitated, and the production efficiency of the fan 100 is improved.

[0087] Of course, it is understandable that the adjustable air duct member 120 can also be constructed as other structures, which are not specifically limited here, as long as the opening area of ​​the adjustable air outlet 121 can be adjusted.

[0088] Combination Figures 3 to 6 In some embodiments of the present invention, adjacent adjustment sheets 123 are partially overlapped in the circumferential direction.

[0089] Specifically, multiple adjustment sheets 123 are arranged in sequence at intervals in the circumferential direction, and parts of adjacent adjustment sheets 123 can be overlapped. Specifically, the multiple adjustment sheets 123 may include: a first adjustment sheet 1231, a second adjustment sheet 1232 and a third adjustment sheet 1233, and the first adjustment sheet 1231, the second adjustment sheet 1232 and the third adjustment sheet 1233 are arranged adjacent to each other in sequence. In the arrangement direction of the multiple adjustment sheets 123, one end of the first adjustment sheet 1231 can be overlapped on the second adjustment sheet 1232, and the end of the second adjustment sheet 1232 away from the first adjustment sheet 1231 can be overlapped on the third adjustment sheet 1233, thereby realizing the partial overlapping of adjacent adjustment sheets 123 to prevent the adjustable air duct member 120 from leaking air due to gaps between adjacent adjustment sheets 123, thereby ensuring the air output power of the fan 100.

[0090] The number of the adjusting pieces 123 and the overlapping size of adjacent adjusting pieces 123 may be determined according to the actual size of the adjusting pieces 123 and the size of the fan 100 , and are not specifically limited here.

[0091] Combination Figures 3 to 6 In some embodiments of the present invention, each adjusting piece 123 is formed as an arc-shaped plate.

[0092] Specifically, a plurality of adjustment sheets 123 are arranged in sequence at intervals in the circumferential direction, and each adjustment sheet 123 is formed as an arc-shaped plate, that is, in the radial direction, the inner wall surface of each adjustment sheet 123 (that is, the side wall surface of the adjustment sheet 123 close to the central axis of the adjustable air duct component 120 in the radial direction) is arc-shaped and bulges away from the central axis of the adjustable air duct component 120, so as to reduce the influence of the shape of the inner wall surface of the adjustable air duct component 120 on the airflow, thereby achieving the purpose of reducing wind resistance and ensuring the flow effect of the airflow.

[0093] Reference Fig.13 In some other embodiments of the present invention, a protruding guide portion 1234 is formed on the side of the adjusting piece 123 facing the center line of the adjustable air duct member 120 , and the guide portion 1234 extends along the axial direction of the adjustable air duct member 120 .

[0094] Specifically, the adjusting piece 123 can be set to have a larger width at one end and a smaller width at the other end, the smaller width end is provided with a rotating connection part 1235, and the larger width end is a free end, the air duct bracket 160 is provided with a connecting structure matching the rotating connection part 1235, the adjusting piece 123 can be connected to the air duct bracket 160 through the rotating connection part 1235, and a guide part 1234 is provided on the adjusting piece 123, and the guide part 1234 is set to protrude along the axial direction toward one side of the center line of the air duct bracket 160, and the radial dimension of the adjusting piece 123 at the guide part 1234 is smaller than the radial dimension of the air guide duct 131.

[0095] Furthermore, the fan 110 is driven to drive the blades 111 to rotate to form an airflow, and the airflow flows to the adjustable air duct component 120. The adjusting plate 123 is provided with a protruding guide portion 1234, and the guide portion 1234 is extended from one end of the adjusting plate 123 close to the air duct bracket 160 to the end away from the air duct bracket 160, so that part of the airflow flowing in the circumferential direction will be gathered in the axial direction under the action of the guide portion 1234 when it flows into the adjustable air duct component 120. When the axial speed of the airflow is relatively low, part of the airflow in the circumferential direction will be converged to the axial direction through the guide portion 1234, so that the airflow flowing out of the adjustable air duct component 120 is more concentrated, thereby increasing the air output and improving the user's experience.

[0096] like Fig.14 As shown, in other embodiments of the present invention, the fan 100 is provided with a driving motor 180, and a plurality of adjustment plates 123 include a main adjustment plate 1237 and a slave adjustment plate 1238, and the main adjustment plate 1237 is at least partially overlapped with the slave adjustment plate 1238, and the main adjustment plate 1237 is suitable for driving the slave adjustment plate 116 to rotate relative to the air guide bracket 130 through the overlapping area so that the outlet area of ​​the adjustable air outlet 121 is adjustable.

[0097] Furthermore, the main adjusting piece 1237 is provided with a pushing portion 1236, and the pushing portion 1236 is arranged on the side of the main adjusting piece 1237 away from the center line of the adjustable air duct member 120, that is, the pushing portion 1236 is arranged on the outside of the main adjusting piece 1237, and the pushing portion 1236 protrudes relative to the main adjusting piece, the driving motor 180 is connected to the pushing portion 1236, and the pushing portion 1236 can rotate around the connecting axis, and the connecting axis is parallel to and spaced from the rotation axis of the main adjusting piece 1237, the driving motor 180 can drive the pushing portion 1236 to drive the main adjusting piece 1237 to rotate around the connecting axis, so as to realize the outward opening and inward contraction of the main adjusting piece 1237, the main adjusting piece 1237 drives the slave adjusting piece 1238 to open outward and contract inward, so as to adjust the opening area of ​​the adjustable outlet air 121, so that the air outlet range of the airflow is different, thereby meeting the different needs of users.

[0098] Combination Figure 4 and Figure 6 In some embodiments of the present invention, in the wind dispersion mode, the expansion angle of the adjustment sheet 123 is less than or equal to 45°, and in the wind gathering mode, the contraction angle of the adjustment sheet 123 is less than or equal to 45°.

[0099] Specifically, the angle a between the axial direction of the adjusting piece 123 and the axial direction of the air guide bracket 130. When the adjusting piece 123 rotates and opens, the inner diameter of the adjustable air duct component 120 gradually increases. When the adjusting piece 123 rotates to the maximum position relative to the air duct bracket 160, a≤45°. This ensures that when the inner diameter of the adjustable air duct component 120 gradually expands, it plays a role of pressurizing and decelerating, so that the blown wind is slow and gentle, and avoids the angle a being too large, which causes the airflow to be under excessive pressure and cannot flow through the adjustable air duct component 120, thereby losing its aerodynamic performance.

[0100] Furthermore, when the adjusting piece 123 rotates and contracts, the inner diameter of the adjustable air duct member 120 gradually decreases. When the adjusting piece 123 rotates to the minimum position relative to the air duct bracket 160, at this time, a≤45°, which can meet the effect of reducing pressure and increasing speed when the adjustable air duct member 120 gradually contracts, so that the blown wind is strong and concentrated, which can be used for rapid cooling, and avoids the angle a being too large, the inner diameter of the adjustable air duct member 120 is small, the resistance rises sharply, the static pressure drops sharply, and the airflow cannot flow through the adjustable air duct member 120, affecting the use effect of the fan 100. Therefore, through the above design, the use function of the fan 100 can be improved to meet the needs of different users for wind feeling.

[0101] like Figure 2 As shown, in some embodiments of the present invention, the fan 100 also includes an air guide bracket 130, which is disposed between the driving fan 110 and the adjustable air duct member 120, and the air guide bracket 130 is provided with an air guide duct 131, and at least a portion of each blade 111 is located in the air guide duct 131.

[0102] Specifically, in the axial direction, the air guide bracket 130 is arranged between the driving fan 110 and the adjustable air duct, and the air guide bracket 130 is constructed in a ring shape. The inner wall of the air guide bracket 130 defines an air guide duct 131. The radial dimension of the air guide duct 131 can be larger than the radial dimension of the circle where the blade tips 1111 of the multiple blades 111 are located, so as to facilitate the arrangement of the blades 111 in the air guide duct 131. The blades 111 rotate in the air guide duct 131 and generate airflow. The air guide duct 131 can guide the airflow into the adjustable air duct component 120. At the same time, the air guide duct 131 can limit the flow of the airflow to prevent the airflow from diverging when it does not flow into the adjustable air duct component 120, thereby ensuring the flow efficiency of the airflow.

[0103] It is understandable that the end of the blade 111 in the axial direction can be set in the air guide duct 131, or the blade 111 can be completely set in the air guide duct 131. The specific arrangement of the blade 111 can be determined based on the dimensions of the fan 100 as a whole, the blade 111, and the air guide bracket 130 in the axial direction, and is not specifically limited here.

[0104] In some specific embodiments of the present invention, the adjustable air duct member 120 can be directly connected to the air guide bracket 130 to further simplify the components of the fan 100, reduce the production cost of the fan 100, and improve the production efficiency of the fan 100; the adjustable air duct member 120 can also be connected to the air guide bracket 130 through the air duct bracket 160, and the adjustable air duct member 120 can be pre-installed on the air duct bracket 160, and the air duct bracket 160 is detachably connected to the air guide bracket 130. When the adjustable air duct member 120 is damaged as a whole, it is convenient to replace the adjustable air duct member 120 as a whole.

[0105] Combination Figure 1 and Figure 2 In some embodiments of the present invention, the fan 100 further includes: a housing 140 and a front mesh cover 150 , wherein the driving fan 110 and the adjustable air duct member 120 are disposed in the housing 140 ; ​​the front mesh cover 150 is disposed in the housing 140 and is located on the air outlet side of the adjustable air duct member 120 .

[0106] It should be noted that a side of the adjustable air duct member 120 away from the driving fan 110 in the axial direction is defined as an air outlet side of the adjustable air duct member 120 .

[0107] Specifically, the housing 140 is constructed as a cylindrical structure with a cavity, and the drive fan 110 and the adjustable air duct member 120 and other structures can be installed in the housing 140. The housing 140 can provide a mounting carrier for the drive fan 110 and the adjustable air duct member 120 and other parts. At the same time, the housing 140 can protect the drive fan 110 and the adjustable air duct member 120 and other parts, and prevent external debris from entering the cavity and causing damage to the drive fan 110.

[0108] Furthermore, an opening is formed on the front side of the housing 140, and the adjustable duct member 120 can be installed on the housing 140 through the duct bracket 160, and the air outlet side of the adjustable duct member 120 is arranged adjacent to the driving fan 110 in the axial direction. The airflow generated by the driving fan 110 can flow from the adjustable duct member 120 to the opening and flow out through the opening, thereby realizing the air outlet of the fan 100.

[0109] Furthermore, there is a front mesh cover 150 on the front side of the air duct bracket 160, and a mesh structure is formed on the front mesh cover 150, through which the airflow can be discharged. At the same time, the front mesh cover 150 can shield the internal structure of the fan 100 to prevent the blades 111 from breaking and flying out through the opening when the fan 100 is working and causing harm to the user. At the same time, it can prevent the user from accidentally touching the blades 111 and getting injured, thereby improving the safety of the fan 100, and the front mesh cover 150 can also reduce the risk of dust and other debris accumulating inside the fan 100.

[0110] Reference Figure 7In some embodiments of the present invention, the front mesh cover 150 includes a plurality of circles of air outlet areas 151, and the plurality of circles of air outlet areas 151 are sequentially arranged along the radial direction.

[0111] Specifically, the air outlet area 151 is constructed in a ring shape, multiple circles of air outlet areas 151 are coaxially arranged, and the multiple circles of air outlet areas 151 are sequentially arranged in the radial direction, thereby realizing a partitioned design of the front mesh cover 150, which is not only beautiful but also can realize visual selection of the air outlet area 151.

[0112] Furthermore, in the first air outlet state, the air outlet area 151 corresponding to the adjustable air outlet 121 is different from the air outlet area 151 corresponding to the adjustable air outlet 121 in the second air outlet state, and since the opening area of ​​the adjustable air outlet 121 of the adjustable air duct member 120 is different in the first air outlet state and the second air outlet state, the flow rate and the air outlet angle of the air flow are different. By partitioning the front mesh cover 150, the structure of the air outlet area 151 is designed according to the flow rate characteristics and the air outlet angle characteristics of the air flow in different air outlet states, which is beneficial to reduce the impact of the front mesh cover 150 on the air flow.

[0113] Combination Figures 3 to 7 In some embodiments of the present invention, in the first air outlet state, the number of air outlet areas 151 directly facing the adjustable air duct member 120 is less than the number of air outlet areas 151 corresponding to the second air outlet state.

[0114] Specifically, in the first air outlet state, the adjustable air duct member 120 is in a wind gathering state, the opening area of ​​the adjustable air outlet 121 is small, the adjustable air outlet 121 is directly opposite to the air outlet area 151 relatively close to the circular center among the multiple air outlet areas 151, and the air flow flows out from the central part of the front mesh cover 150. The air outlet area of ​​the fan 100 is small and the air outlet is strong, thereby realizing the wind gathering mode of the fan 100.

[0115] In the second air outlet state, the adjustable air duct member 120 is in a dispersed wind state, the opening area of ​​the adjustable air outlet 121 is large, the adjustable air outlet 121 can be opposite to multiple air outlet areas 151 at the same time, and the air flow can flow out through multiple air outlet areas 151 at the same time to increase the air outlet area of ​​the fan 100, and the air outlet is soft, thereby realizing the dispersed wind mode of the fan 100.

[0116] In addition, the air outlet area 151 corresponding to the adjustable air duct member 120 is different in different air outlet states, and the user can intuitively observe the air outlet area 151, so as to intuitively feel that the air outlet areas of the fan 100 are different in different modes, thereby improving the user's usage experience.

[0117] like Figure 7As shown, in some embodiments of the present invention, the multi-circle air outlet area 151 includes an outermost circle air outlet area 1511 and at least one inner circle air outlet area 1512, the air guide ribs 152 of the outermost circle air outlet area 1511 are formed as straight line ribs 1521; the air guide ribs 152 of each inner circle air outlet area 1512 are formed as arc-shaped ribs 1522; in the second air outlet state, the adjustable air outlet 121 is arranged opposite to the outermost circle air outlet area 1511 and each inner circle air outlet area 1512; in the first air outlet state, the adjustable air outlet 121 is arranged opposite to at least one inner circle air outlet area 1512.

[0118] Specifically, the inner circle air outlet area 1512 can adopt an Archimedean spiral design, that is, a plurality of arc-shaped ribs 1522 extending in the radial direction are arranged in the inner circle air outlet area 1512, and each arc-shaped rib 1522 is designed using the Archimedean spiral principle. The plurality of arc-shaped ribs 1522 are evenly spaced along the circumferential direction, and the arc-shaped bulge directions of the arc-shaped ribs 1522 are all the same. The arc-shaped ribs 1522 can effectively reduce the resistance of the air guide ribs 152 to the airflow, thereby effectively reducing the resistance of the front mesh cover 150 to the airflow flow.

[0119] In the first air outlet state, the adjustable air outlet 121 is arranged opposite to the inner circle air outlet area 1512. After the airflow flows out from the adjustable air outlet 121, it flows to the inner circle air outlet area 1512. The arc-shaped ribs 1522 can rectify the airflow so that the circumferential velocity of the airflow can be converted into an axial velocity, thereby ensuring the convergence effect of the airflow and ensuring that the fan 100 has a strong air output.

[0120] Furthermore, the outermost circle air outlet area 1511 is provided with straight ribs 1521 extending in the radial direction, and a plurality of straight ribs 1521 are evenly spaced apart in the circumferential direction. In the second air outlet state, the adjustable air outlet 121 is simultaneously arranged opposite to the outermost circle air outlet area 1511 and the inner circle air outlet area 1512. After the airflow flows out from the adjustable air outlet 121, it flows to the outermost circle air outlet area 1511 and each inner circle air outlet area 1512. The straight ribs 1521 can ensure that the airflow can move in the circumferential direction, thereby ensuring the flow area of ​​the airflow and ensuring the air outlet area of ​​the fan 100 in the radial direction.

[0121] It is understandable that there may be one, two or three inner circle air outlet areas 1512, and the specific number of inner circle air outlet areas 1512 may be determined based on the actual processing of the front mesh cover 150 and the application conditions of the fan 100, and is not specifically limited here.

[0122] Among them, when there are multiple inner circle air outlet areas 1512, the adjustable air duct member 120 can have multiple air outlet states. For example, when there are two inner circle air outlet areas 1512, the adjustable air duct member 120 can have an intermediate air outlet state in addition to the first air outlet state and the second air outlet state. Specifically, in the first air outlet state, the adjustable air outlet 121 is arranged corresponding to the inner circle air outlet area 1512 located at the innermost side. At this time, the opening area of ​​the adjustable air outlet 121 is the smallest, and the air outlet intensity of the fan 100 is the largest; in the first air outlet state, the adjustable air outlet 121 is arranged corresponding to the inner circle air outlet area 1512 located at the innermost side. In the second air outlet state, the adjustable air outlet 121 is simultaneously set to correspond to the two inner circle air outlet areas 1512 and the outermost circle air outlet area 1511. At this time, the opening area of ​​the adjustable air outlet 121 is the largest, and the fan 100 outputs the softest air; in the middle air outlet state, the adjustable air outlet 121 is simultaneously set to correspond to the two inner circle air outlet areas 1512. At this time, the opening area of ​​the adjustable air outlet 121 is in the middle state between the maximum and the minimum, and the air output of the fan 100 is at a medium intensity, which can further meet the user's usage needs.

[0123] In some embodiments of the present invention, in the axial direction away from the adjustable air duct member 120 , the air outlet end of the linear rib 1521 extends obliquely outward in a direction away from the rotation center line of the driving fan 110 .

[0124] It should be noted that, in the extension direction of the linear rib 1521, the end of the linear rib 1521 away from the adjustable air duct component 120 is defined as the air outlet end of the linear rib 1521, and the end of the linear rib 1521 close to the adjustable air duct component 120 is defined as the air inlet end of the linear rib 1521.

[0125] Specifically, in the radial direction of the air outlet area 151, the distance between the air inlet end of the straight rib 1521 and the rotation centerline of the driving fan 110 is the smallest, and the distance between the air outlet end of the straight rib 1521 and the rotation centerline of the driving fan 110 is the largest, so that the straight rib 1521 and the rotation centerline of the driving fan 110 (which can also be understood as the central axis of the driving fan 110) are arranged at an angle, and the straight rib 1521 generates little resistance to the airflow, thereby ensuring the circumferential velocity of the airflow when flowing out from the front mesh cover 150, which is beneficial to ensuring the air outlet area of ​​the fan 100 in the radial direction.

[0126] In some embodiments of the present invention, the inclination angle of the linear rib 1521 relative to the rotation center line ranges from 20° to 40°.

[0127] Specifically, the inclination angle between the straight rib 1521 and the rotation center line ranges from 20° to 40°, to ensure that the straight rib 1521 has little resistance to the airflow and to ensure the circumferential speed of the airflow when it flows out from the front mesh cover 150, thereby facilitating ensuring the air outlet area of ​​the fan 100 in the radial direction.

[0128] In some embodiments of the present invention, in the second air outlet state, in the direction toward the adjustable air outlet 121 , the longitudinal section of the adjustable air duct member 120 extends obliquely outward in a direction away from the rotation centerline of the driving fan 110 .

[0129] Specifically, in the second air outlet state, in the direction toward the adjustable air outlet 121, the radial distance between the inner wall surface of the adjustable air duct component 120 and the rotation center line of the driving fan 110 gradually increases, wherein the radial distance between the inner wall surface of the adjustable air duct component 120 at the air inlet end 122 and the rotation center line of the driving fan 110 is the smallest, and the radial distance between the inner wall surface of the adjustable air duct component 120 at the air outlet side and the rotation center line of the driving fan 110 is the largest, so that the air outlet angle of the adjustable air duct component 120 in the second state can be roughly parallel to the straight ribs 1521, so as to reduce the air outlet resistance and ensure the circumferential velocity of the airflow.

[0130] Combination Figures 8 to 11 By performing simulation analysis on the fan 100 of the present application, when the fan 100 is not provided with the front mesh cover 150 and in the first air outlet state, at the standard test distance, the blowing range of the fan 100 is 0.29 m2, and the average wind speed within the blowing range is 1.52 m / s; in the second air outlet state, at the standard test distance, the blowing range of the fan 100 is 0.32 m2, and the average wind speed within the blowing range is 1.36 m / s.

[0131] It should be noted that the blowing range refers to the area where the wind speed of the fan 100 is greater than 0.4 m / s, and the "standard test distance" can be three times the diameter of the circle where the multiple blade tips 1111 are located, so as to facilitate simulation and test comparison of the fan 100.

[0132] Of course, it is understandable that when simulating and testing the fan 100, it is not limited to measuring at the above-mentioned "standard test distance", as long as the air outlet effects of the fan 100 when it is provided with a front mesh cover 150 and when it is not provided with a front mesh cover 150 are measured at the same position.

[0133] Based on the above data, it can be seen that when the adjustable air duct member 120 is in the first air outlet state (i.e., the fan 100 is in the wind gathering mode), the blowing range of the fan 100 is smaller and the wind speed is higher. The adjustable air duct member 120 has an obvious convergence effect on the airflow, but because the fan 100 does not rectify the airflow, the airflow still maintains a circumferential speed. After the airflow flows out of the adjustable air duct member 120 (i.e., Figure 8 The position indicated by the arrow in Figure A) diffuses in a cone shape.

[0134] When the fan 100 is provided with a front mesh cover 150, and in the first air outlet state, at the standard test distance, the blowing range of the fan 100 is 0.24 m2, and the average wind speed within the blowing range is 1.61 m / s; in the second air outlet state, at the standard test distance, the blowing range of the fan 100 is 0.45 m2, and the average wind speed within the blowing range is 1.26 m / s.

[0135] Based on the above simulation analysis data, the fan 100 is compared with the fan 100 having the front mesh cover 150 and the fan 100 not having the front mesh cover 150. In the first air outlet state, the fan 100 is Figure 8 and Fig. 9 ,in, Figure 8 As shown in A and Fig. 9 The fan 100 is shown in C without the front mesh cover 150. Figure 8 As shown in B and Fig. 9 FIG. 1 shows a fan provided with a front mesh cover 150. It can be seen that when the fan 100 is provided with the front mesh cover 150, the blowing range thereof is smaller and the wind speed is higher. The front mesh cover 150 can play a role in rectifying the airflow, and after rectifying the airflow, the circumferential velocity of the airflow is converted into the axial velocity, and after flowing out of the adjustable air duct member 120 (i.e. Figure 8 The airflow angle (at the position indicated by the arrow in Figure B) is significantly reduced, which is beneficial to increasing the wind speed and wind intensity of the fan 100 in the wind focusing mode.

[0136] In the second air flow state, combined with Fig.10 and Fig.11 ,in, Fig.10 As shown in E and Fig.11 The fan 100 is shown in FIG. G without the front mesh cover 150. Fig.10 As shown in F and Fig.11 As shown in H in the middle, the fan 100 is provided with a front mesh cover 150. It can be seen that when the fan 100 is provided with the front mesh cover 150, the blowing range thereof is larger and the wind speed is lower, which can improve the softness of the air outlet of the fan 100 in the scattered wind mode and improve the user's experience.

[0137] In some embodiments of the present invention, the front mesh cover 150 is detachably disposed on the housing 140 .

[0138] Specifically, the front mesh cover 150 can be buckled and matched with the outer shell 140 to cover the opening to prevent the fan 100 from causing mechanical damage to the user, and the front mesh cover 150 is detachably connected to the outer shell 140. When the fan 100 fails, the front mesh cover 150 can be removed from the shell to facilitate the inspection and maintenance of components such as the adjustable air duct part 120 and the driving fan 110, thereby improving the maintenance convenience of the fan 100.

[0139] The front mesh cover 150 can be detachably connected to the outer shell 140 by means of threaded connection or snap connection. The specific connection method between the front mesh cover 150 and the outer shell 140 is not limited here, as long as the front mesh cover 150 and the outer shell 140 are detachably connected.

[0140] In some embodiments of the present invention, a rear mesh cover is provided on the rear side of the fan 100, and the outside air can flow into the fan 100 through the rear mesh cover, and the fan 110 drives the blades 111 to rotate so that the air flowing into the fan 100 forms an airflow and is blown out, and the airflow can flow into the adjustable air duct member 120, and the adjustable air duct member 120 can make the airflow diverge or converge, and then the airflow flows to the front mesh cover 150 and flows out from the front mesh cover 150.

[0141] According to the fan control method of the present invention, the fan 100 is the above-mentioned fan 100, and the control method includes: controlling the adjustable air duct member 120 to switch between a first air outlet state and a second air outlet state; in the first air outlet state and the second air outlet state, controlling the driving fan 110 to operate, and the plurality of blades 111 rotate to supply air toward the adjustable air duct member 120, and the adjustable air duct member 120 guides the airflow to the adjustable air outlet 121.

[0142] Reference Fig.15 , the control method comprises the following steps:

[0143] S10, controlling the adjustable air duct member 120 to switch between a first air outlet state and a second air outlet state.

[0144] Specifically, when the user has different usage requirements, it is necessary to control the adjustable air duct member 120 to switch between the first air outlet state and the second air outlet state to adjust the air outlet range and air outlet feeling of the fan 100. For example, when the user is in a high temperature environment and needs strong air outlet, the fan 100 is in the wind gathering state. At this time, the adjustable air duct member 120 is in the first air outlet state, the opening area of ​​the adjustable air outlet 121 is small, the air outlet intensity of the fan 100 is large, and the air outlet feeling is obvious. After using the fan for cooling for a period of time, the user The cooling demand of the user is reduced. At this time, it is necessary to switch the fan 100 from the wind gathering mode to the wind dispersion mode to reduce the air outlet intensity of the fan 100. At this time, the adjustable air duct member 120 is controlled to switch from the first air outlet state to the second air outlet state, and the driving device drives the moving member 170 to move. The moving member 170 drives the adjustable air duct member 120 to move to increase the opening area of ​​the adjustable air outlet 121, so that the airflow flowing out of the adjustable air duct member 120 is more divergent in the radial direction, and the airflow is softer to meet the user's usage needs.

[0145] The fan 100 may be provided with a controller, and the controller controls the adjustable air duct member 120 to switch between the first air outlet state and the second air outlet state.

[0146] S20 , in the first air outlet state and the second air outlet state, the fan 110 is controlled to operate, and the plurality of blades 111 rotate to deliver air toward the adjustable air duct member 120 , and the adjustable air duct member 120 guides the airflow to the adjustable air outlet 121 .

[0147] Specifically, when the fan 100 is running, the controller can control the operation of the driving fan 110, and the driving fan 110 drives the multiple blades 111 to rotate. The blades 111 are preferably axial flow blades. The airflow along the blades 111 away from the side of the adjustable air duct member 120 (i.e., the rear side of the blades 111) in the axial direction can be driven by the blades 111 to flow toward the side of the adjustable air duct member 120 (i.e., the front side of the blades 111) during the rotation of the blades 111 to form an airflow, and the airflow forms an oblique airflow through the guide of the blades 111. The airflow has a speed in the axial direction and a speed in the circumferential direction, that is, part of the airflow flows in the axial direction, and the other part of the airflow flows in the circumferential direction.

[0148] Specifically, when the airflow flows into the adjustable duct member 120 and the adjustable duct member 120 is in the first air outlet state, the multiple adjustment plates 123 shrink in the radial direction and the adjustment plates can guide the airflow. The opening area of ​​the adjustable air outlet 121 is small, and the inner wall of the adjustable duct member 120 can regularize the airflow to convert the circumferential velocity of the airflow into an axial velocity. That is, the adjustable duct member 120 adjusts part of the airflow flowing in the circumferential direction to flow in the axial direction to converge the airflow. At this time, the air outlet intensity of the fan 100 is large.

[0149] When the adjustable air duct component 120 is in the second air outlet state, the multiple adjustment plates 123 expand in the radial direction, the opening area of ​​the adjustable air outlet 121 is large, and the adjustable air duct component 120 has little interference with the partial airflow flowing in the circumferential direction. When the airflow is discharged from the adjustable air duct component 120, the airflow can still maintain a certain circumferential speed, so that the air outlet of the fan 100 is more divergent and the airflow is softer.

[0150] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0151] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fan, characterized in that, comprising: a driving fan, the driving fan including a plurality of blades; an adjustable air duct member, the adjustable air duct member being located on the air outlet side of the driving fan, the adjustable air duct member having a first air outlet state and a second air outlet state, and the opening area of the adjustable air outlet of the adjustable air duct member being smaller in the first air outlet state than in the second air outlet state; On a first projection plane, the orthographic projection of the air inlet end of the adjustable air duct member covers the circle where the tips of the plurality of blades are located, and the first projection plane is perpendicular to the rotation center line of the driving fan.

2. The fan according to claim 1, characterized in that, in the first air outlet state, in the direction towards the adjustable air outlet, the cross-sectional area of the adjustable air duct member gradually decreases.

3. The fan according to claim 1, characterized in that, in the second air outlet state, in the direction towards the adjustable air outlet, the cross-sectional area of the adjustable air duct member gradually increases.

4. The fan according to claim 1, characterized in that, the adjustable air duct member includes a plurality of adjusting pieces arranged at intervals in the circumferential direction, and each adjusting piece is rotatable to enable the adjustable air duct member to switch between the first air outlet state and the second air outlet state.

5. The fan according to claim 4, characterized in that, in the circumferential direction, adjacent adjusting pieces are partially overlapped.

6. The fan according to claim 4, characterized in that, each adjusting piece is formed as an arc-shaped plate.

7. The fan according to claim 1, characterized in that, further comprising a wind guiding bracket, the wind guiding bracket being arranged between the driving fan and the adjustable air duct member, the wind guiding bracket being provided with a wind guiding duct, and at least a part of each blade being located in the wind guiding duct.

8. The fan according to any one of claims 1-7, characterized in that, further comprising: a housing, the driving fan and the adjustable air duct member being arranged in the housing; a front grille, the front grille being arranged on the housing and located on the air outlet side of the adjustable air duct member.

9. The fan according to claim 8, characterized in that, the front grille includes multiple circles of air outlet areas, and the multiple circles of air outlet areas are arranged in sequence along the radial direction.

10. The fan according to claim 9, characterized in that, in the first air outlet state, the number of the air outlet areas facing the adjustable air duct member is less than the number of the air outlet areas corresponding to the second air outlet state.

11. The fan according to claim 10, characterized in that, the multiple circles of air outlet areas include an outermost circle air outlet area and at least one inner circle air outlet area, and the guiding ribs of the outermost circle air outlet area are formed as straight ribs; the guiding ribs of each inner circle air outlet area are formed as arc-shaped ribs; in the second air outlet state, the adjustable air outlet is arranged opposite to the outermost circle air outlet area and each inner circle air outlet area; in the first air outlet state, the adjustable air outlet is arranged opposite to at least one inner circle air outlet area.

12. The fan according to claim 11, characterized in that, In the axial direction away from the adjustable air duct member, the air outlet end of the straight rib extends obliquely outward in a direction away from the rotation center line of the driving fan.

13. The fan according to claim 12, wherein, the value range of the inclination angle of the straight rib relative to the rotation center line is 20-40°.

14. The fan according to claim 12, wherein, in the second air outlet state, in the direction towards the adjustable air outlet, the longitudinal section of the adjustable air duct member extends obliquely outward in a direction away from the rotation center line of the driving fan.

15. The fan according to claim 8, wherein, the front grille is detachably provided on the housing.

16. A control method for a fan, wherein, the fan is the fan according to any one of claims 1-15, and the control method includes: controlling the adjustable air duct member to switch between the first air outlet state and the second air outlet state; in the first air outlet state and the second air outlet state, controlling the driving fan to operate, and the plurality of blades rotate to send air towards the adjustable air duct member, and the adjustable air duct member guides the air flow to the adjustable air outlet.

Images