WO2019120180A1

WO2019120180A1 - Fan head assembly for bladeless air-blowing apparatus, bladeless air-blowing apparatus, head for bladeless fan, and bladeless fan

Info

Publication number: WO2019120180A1
Application number: PCT/CN2018/121607
Authority: WO
Inventors: 罗伟锦; 叶似锦; 卢键彬; 宋坪泽
Original assignee: 广东美的环境电器制造有限公司; 美的集团股份有限公司
Priority date: 2017-12-19
Filing date: 2018-12-17
Publication date: 2019-06-27
Also published as: EP3726066B1; EP3726066A1; EP3726066A4

Abstract

A fan head assembly for a bladeless air-blowing apparatus, a bladeless air-blowing apparatus, a head (100) for a bladeless fan (1000), and a bladeless fan (1000). The fan head assembly comprises an air outlet portion (10). The air outlet portion (10) comprises an air inlet (13), a nozzle (12), and an air duct (11). Both the air inlet (13) and the nozzle (12) communicate with the air duct (11). The air duct (11) has a variable cross-section part. An airflow passage area of the variable cross-section part continuously switches from bottom to top, and the airflow passage area at the lower end of the variable cross-section part is larger than the airflow passage area at the upper end. The configuration allows a flow rate of an inlet airflow to increase when the inlet airflow passes through the variable cross-section part, such that the flow rate of the airflow output from an upward nozzle and a downward nozzle at the variable cross-section part is uniform, thereby improving the user experience.

Description

Fan head assembly for leafless blower, leafless blower, noseless fan and vaneless fan

This application claims the priority of the following four Chinese patent applications submitted by the State Intellectual Property Office of China on December 19, 2017: 1. The application number is 201721803727.9, and the invention name is “leafless fan and its nose”. Patent application; Second, the application number is 201711376203.0, the invention name is "a fan head assembly and a leafless blowing device" Chinese patent application; Third, the application number is 201721803860.4, the invention name is "a fan head assembly and no leaf blowing Chinese patent application of the device; Fourth, the application number is 201711378783.7, the Chinese patent application titled "a fan head assembly and a leafless hair dryer"; the entire contents of the above four Chinese patent applications are incorporated herein by reference. .

Technical field

The invention relates to the field of living appliances, in particular to a fan head assembly for a bladeless blowing device, a bladeless blowing device, a head for a bladeless fan and a bladeless fan.

Background technique

The bladeless fan generates a high pressure airflow through the power system, and the high pressure airflow enters the air duct and is sent through the nozzle. However, in the existing bladeless fan, after the high-pressure airflow enters the air duct from the air inlet, the closer to the nozzle on the lower side of the air duct, the larger the airflow velocity is, and the smaller the airflow velocity from the nozzle closer to the upper side of the air duct is. The flow velocity of the airflow caused by the nozzle is uneven in the up and down direction of the nozzle extension, resulting in a poor user experience.

Summary of the invention

In view of this, embodiments of the present invention are desired to provide a fan head assembly for a bladeless air blowing device, a bladeless air blowing device, a nose for a bladeless fan, and a bladeless fan to improve the uniformity of the airflow velocity emitted by the nozzle. Sexuality enhances user experience.

In order to achieve the above object, an aspect of an embodiment of the present invention provides a fan head assembly for a bladeless air blowing device, including an air outlet portion, the air outlet portion including an air inlet, a nozzle, and a air duct, the air inlet and the air inlet The nozzles are all connected to the air duct, the air passage has a variable cross-sectional portion, the variable cross-sectional portion continuously changes from the bottom to the upper airflow flow area, and the corresponding airflow flow area at the lower end of the variable cross-section portion It is larger than the corresponding airflow area at the upper end.

Further, the variable section portion is located at an upper portion and/or a middle portion of the air duct.

Further, the side wall of the air outlet portion is contracted from the bottom to the top to form the variable cross-sectional portion.

Further, the nozzle extends in the up and down direction of the air passage, and the number of the variable cross-sectional portions is plural, and the plurality of the variable cross-sectional portions are spaced apart along the vertical direction of the air passage.

Further, the fan head assembly includes a flow guiding device disposed in the air duct, the flow guiding device includes a first flow guiding member, and the first flow guiding member has a first flow guiding surface, the first The flow guiding surface extends obliquely downward to block a part of the intake air flow, and the airflow flow area of the corresponding air passage at the lower end of the first flow guiding surface is larger than the airflow flow area of the corresponding air passage at the upper end of the first flow guiding surface a corresponding air passage between the lower end and the upper end of the first flow guiding surface is the variable cross-sectional portion.

Further, the first flow guiding member has a plate shape, and the first flow guiding member extends obliquely downward from an upper end of the air passage.

Further, the first flow guiding surface faces the nozzle to guide a portion of the intake air flow to the nozzle.

Further, the nozzle is disposed on a first side of the air outlet portion, and the first flow guiding member is disposed on a second side of the air outlet portion opposite to the first side, an edge of the first flow guiding member The inner wall of the second side of the air outlet portion is sealingly connected.

Further, the first flow guiding surface faces the side wall of the air outlet portion, and an edge of the first air guiding member is sealingly connected with a sidewall of the air outlet portion.

Further, the flow guiding device further includes a second flow guiding member located above the first flow guiding member, the second flow guiding member having a second flow guiding surface extending obliquely upward, the second guiding surface The lower end is connected to the upper end of the first flow guiding surface, and the airflow flow area of the air duct at the lower end of the second flow guiding surface is smaller than the airflow circulating area of the air duct at the upper end of the second flow guiding surface.

Further, the second flow guiding surface is a plane, a curved surface, or a combination of a plane and a curved surface; and/or the first flow guiding surface is a plane, a curved surface, or a combination of a plane and a curved surface.

Further, from the lower end of the second flow guiding surface to the upper end of the second flow guiding surface, the flow area of the corresponding air passage gradually increases.

Further, the flow guiding device includes a third flow guiding member, the third flow guiding member has a third flow guiding surface, and the second guiding surface passes through the third guiding surface and the first guiding surface Smooth transition connection.

Further, the air outlet portion includes a front air outlet member and a rear air outlet member, the front air outlet member and the rear air outlet member jointly define the air duct, and the nozzle is disposed in front of the front air outlet member On the side, the flow guiding device is sealingly connected to the rear side of the rear air outlet.

Further, the flow guiding device and the rear air outlet are of a unitary structure.

Further, one of the front air outlet member and the rear air outlet member is provided with a positioning card slot, and the other portion is provided with a positioning protrusion that cooperates with the positioning card slot, and the front air outlet member And the rear air outlet member is connected by ultrasonic welding or by gluing.

Further, the fan head assembly further includes a housing member, and the housing member is disposed outside the air outlet portion.

Further, from the lower end of the first flow guiding surface to the upper end of the first flow guiding surface, the flow area of the corresponding air passage gradually decreases.

Further, the air outlet portion further includes a reinforcing rib disposed in the air duct, and both ends of the reinforcing rib are fixedly connected to the left and right inner walls of the air duct.

Further, the nozzles extend along the upper and lower sides of the air passage, and the number of the flow guiding devices is plural, and the plurality of the flow guiding devices are spaced apart along the vertical direction of the air passage, and the plurality of guides are The flow device is disposed corresponding to the nozzle.

A second aspect of the embodiments of the present invention provides a fan head assembly for a bladeless air blowing device, including an air outlet portion, the air outlet portion includes an air inlet, a nozzle, and a air duct, and the air inlet and the nozzle are both Communicating with the air duct, the air duct includes a first end and a second end, the air flow direction is from the first end to the second end of the air duct, and the air duct includes a variable cross-section portion, The air flow area of the variable cross-section portion along the airflow direction continuously changes, and the airflow flow area corresponding to the end of the variable cross-section portion near the first end is larger than the airflow flow area corresponding to the end of the second end.

Further, the variable cross-sectional portion is formed by inward contraction of a sidewall of the air outlet portion.

Further, the nozzle extends along the airflow direction of the air duct, and the number of the variable cross-section portions is plural, and the plurality of the variable cross-section portions are spaced apart along the airflow direction of the air duct.

Further, the fan head assembly includes a flow guiding device disposed in the air duct, the flow guiding device includes a first flow guiding member, and the first flow guiding member has a first flow guiding surface, the first The flow guiding surface extends obliquely with respect to the air flow direction to block a part of the intake air flow, and the air passage at the corresponding position of the first flow guiding surface is the variable cross-sectional portion.

Further, the flow guiding device further includes a second flow guiding member located near the second end of the first flow guiding member, the second guiding member having a second guiding surface extending obliquely with respect to the airflow direction The second flow guiding surface is connected to the first flow guiding surface, and an air flow area corresponding to an air passage corresponding to one end of the second flow guiding surface is smaller than the second guiding An airflow flow area of the air passage corresponding to one end of the flow surface away from the first flow guiding surface.

Further, along the airflow direction, the airflow area of the air channel corresponding to the second air guiding surface gradually increases.

A third aspect of the embodiments of the present invention provides a bladeless air blowing device including a base, a power system disposed in the base, and a fan assembly of any of the above, the fan assembly being coupled to the base An intake air flow generated by the power system is received through the air inlet and the intake air flow is emitted through the nozzle.

Further, the leafless blowing device is any one of a bladeless fan, a bladeless blower, a leafless heater, a leafless humidifier, and a bladeless air cooler.

A fourth aspect of the embodiments of the present invention provides a handpiece for a bladeless fan, wherein a air duct is formed in the nose, the air duct has a first end and a second end, and the air duct has a first The air inlet is provided at an end, and the airflow direction is from the first end to the second end of the air duct, and the wall of the air duct is provided with a wall penetrating the air duct in a direction perpendicular to the airflow direction. The air outlet is arranged along the airflow direction; wherein the first end and the second end of the air duct have a gradual change section in which the flow area gradually changes in the airflow direction.

Further, the transition section includes a first subsection, and the first subsection gradually decreases in a flow area in the airflow direction.

Further, one end of the first sub-section extends to or is spaced apart from a first end of the air duct, and the other end of the first sub-section extends to the air duct Second end.

Further, the first sub-segment is spaced apart from the second end of the air duct, and the gradual change segment further includes a second sub-segment, one end of the second sub-segment and the first sub-segment Connected, and the other end of the second sub-section extends toward the second end of the air duct, and the second sub-section gradually increases in a flow area in the airflow direction.

Further, the length of the second sub-segment in the airflow direction is greater than the length of the first sub-segment in the airflow direction.

Further, the gradual segment is directly opposite to at least a portion of the air outlet.

Further, the wall of the air duct is convex toward the inner side of the air duct to form the gradation section.

Further, the gradation section includes a plurality of intervals arranged in the airflow direction, and a plurality of the gradation sections have the same length dimension in the airflow direction.

Further, the gradation segment includes at least three spaced apart in the direction of the airflow, and the spacing between each adjacent two of the at least three of the gradual segments is the same.

Further, the handpiece includes a first air duct member and a second air duct member, and the air duct is formed in the first air duct member and the second air duct member, wherein the first air duct One end of the air duct member is connected to and communicates with one end of the second air duct member; or one end of the first air duct member and one end of the second air duct member are connected by a connecting member and the first air duct The air duct in the piece is separated from the air duct in the second air duct member.

Further, the handpiece includes a first air duct member, a second air duct member, and a connecting member, the first air duct member extending in an up and down direction; the second air duct member extending in an up and down direction, and The first air duct member and the second air duct member are arranged side by side and parallel to each other; two ends of the connecting member are respectively connected to an upper end of the first air duct member and an upper end of the second air duct member, wherein a wind tunnel is formed in the first air duct member and the second air duct member, and a lower end of the air duct is the first end, and an upper end of the air duct is the second end .

A fifth aspect of the embodiments of the present invention provides a bladeless fan, including a base, a handpiece, and a wind making device, wherein the handpiece is any one of the above-mentioned heads for a bladeless fan and is mounted on the base And the air blowing device is disposed in the base and is configured to supply airflow into the air duct.

In the fan head assembly of the embodiment of the invention, during the flow of the intake air flowing through the variable cross-section portion, the flow velocity of the intake air flow is increased, so that the flow velocity of the airflow corresponding to the nozzle corresponding to the variable cross-section portion is relatively uniform, thereby improving the user experience.

DRAWINGS

1 is a schematic exploded view of a fan head assembly according to a first embodiment of a first embodiment of the present invention;

2 is a schematic view showing the assembly structure of the fan head assembly of FIG. 1;

3 is a schematic structural view of an air outlet portion of the fan head assembly of FIG. 1;

Figure 4 is a schematic structural view of the rear air outlet member and the flow guiding device of Figure 1;

Figure 5 is a left side view of Figure 4;

6 is a schematic structural view of a rear air outlet according to a second embodiment of the present invention;

7 is a schematic structural view of a rear air outlet and a flow guiding device according to a third embodiment of the present invention;

8 is a schematic structural view of a rear air outlet and a flow guiding device according to a fourth embodiment of the present invention;

9 is a schematic structural view of a rear air outlet and a flow guiding device according to a fifth embodiment of the present invention;

10 is a schematic structural view of a rear air outlet and a flow guiding device according to a sixth embodiment of the present invention;

Figure 11 is a schematic structural view showing the air outlet portion of the rear air outlet member of Figure 8 taken along the A-A direction of Figure 8 and rotated 90° clockwise;

12 is a schematic view of a handpiece according to an embodiment of a second embodiment of the present invention;

Figure 13 is an exploded view of the handpiece shown in Figure 12;

Figure 14 is a schematic view showing the combination of the first splicing portion and the second splicing portion shown in Figure 13;

Figure 15 is a side elevational view of the first splice portion and the second splice portion shown in Figure 14;

Figure 16 is a cross-sectional view of the first splice portion and the second splice portion shown in Figure 15;

Figure 17 is a perspective view of the first splicing portion shown in Figure 13;

Figure 18 is another perspective view of the first splicing portion shown in Figure 13;

Figure 19 is a perspective view of a first splicing portion according to an embodiment of a second embodiment of the present invention;

Figure 20 is a perspective view of a first splicing portion according to another embodiment of the second embodiment of the present invention;

21 is a perspective view of a first splicing portion according to still another embodiment of the second embodiment of the present invention;

Figure 22 is a schematic view of a bladeless fan in accordance with an embodiment of a second embodiment of the present invention.

Detailed ways

Specific embodiment 1

The specific embodiment 1 will be described below with reference to FIGS. 1-11. The orientation words "upper", "lower", "front", "back", "left", "right", etc. used in the specific embodiments of the present invention are the orientation words for the normal use of the leafless blowing device, "front" Refers to the side facing the user, "back" refers to the side facing away from the user, taking Figure 5 as an example, "front" is the outward facing direction of the vertical paper shown in Figure 5, "back" is Figure 5. The direction in which the vertical paper is shown faces inward, "upper" and "lower" are the up and down directions shown in Fig. 5, and "left" and "right" are the left and right directions shown in Fig. 5.

In the specific embodiment, the "injection angle" is an angle between the direction of the airflow emitted by the nozzle and the horizontal direction shown in FIG. The "airflow area" refers to the area of the air duct 10 in the horizontal direction shown in Fig. 5, and the area in the duct 11 through which the intake air flows upward. "First side" and "second side" refer to the direction. The "side wall of the air outlet portion" refers to all the side walls of the casing in which the air outlet portion 10 surrounds the air passage 11, including the left side wall 101a, the right side wall 101b, the front side wall, and the rear side wall of the air duct 11. .

A specific embodiment of the present invention provides a bladeless air blowing device comprising a base (not shown), a power system (not shown) disposed in the base, and a fan assembly, the fan assembly being coupled to the base for receiving power The intake air flow generated by the system and the outward flow of the intake air. In this embodiment, the bladeless air blowing device is described as an example of a bladeless fan. It can be understood that the type of the bladeless blowing device is not limited to the bladeless fan, and may be, for example, any one of a bladeless blower, a bladeless heater, a leafless humidifier, and a bladeless air cooler.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , a first embodiment of the present invention, the fan head assembly includes an air outlet portion 10 and a casing member 30 , and the air outlet portion 10 includes an air inlet 13 , a nozzle 12 , and a duct 11 . The air inlet 13 and the nozzle 12 are both connected to the air duct 11, and the overall shape of the air outlet portion 10 is not limited, and may be a circular ring shape, a circular shape, a polygonal shape, or the like. The cavity inside the air outlet portion 10 forms the air passage 11, the air passage. The shape of 11 matches the shape of the air outlet portion 10. In the present embodiment, the shape of the air outlet portion 10 is substantially a bilaterally symmetrical ∩-shaped structure, the number of the air inlets 13 is two, and the air outlets of the right and left sides of the air outlet portion 10 of the dome-shaped air outlet portion 10 each have an air inlet. 13. The nozzle 12 of the air outlet portion 10 is disposed on the first side of the air outlet portion 10, and the first side may be the front side of the air outlet portion 10 facing the user, or may be the rear side facing away from the user. The nozzle 12 can extend in the up and down direction of the first side, has a long slit structure and a small slit has a small width. The power system in the pedestal generates a pressurized intake air flow, and the intake air flow enters the air passage 11 from the susceptor through the air inlet 13 , and the intake air flow is continuously emitted from the nozzle 12 during the movement from bottom to top in the air passage 11 .

The structural form of the air outlet portion 10 is not limited. For example, the left side wall 101a, the right side wall 101b, the front side wall, and the rear side wall of the air outlet portion 10 may be integrally formed. For example, referring to FIG. 1 and FIG. 3, in the first embodiment, in order to facilitate the demoulding process during production, the air outlet portion 10 includes the front air outlet member 14 and the rear air outlet member 15, the front air outlet member 14 and the rear portion. The air outlet member 15 is sealingly butted, and the inside of the front air outlet member 14 and the rear air outlet member 15 are hollow chambers, and the hollow chambers of the two jointly define the air passage 11 described above. The nozzle 12 is disposed on the front side of the front air outlet member 14, that is, the first side of the air outlet portion 10. In order to facilitate the connection and positioning of the front air outlet 14 and the rear air outlet 15, the corresponding positions of the front air outlet 14 and the rear air outlet 15 are provided with matching positioning slots 141 and positioning protrusions 151 through the positioning protrusions. The 151 is snapped into the positioning card slot 141, that is, the relative positions of the front air outlet member 14 and the rear air outlet member 15 are pre-positioned to facilitate subsequent sealing connection, for example, glue bonding or ultrasonic welding at the butt joint.

Since the air outlet portion 10 is generally formed into a flat thin wall structure, when the air outlet portion 10 receives external pressure, the shape of the air passage 11 therein is likely to change, thereby affecting the fluid distribution in the air passage 11. To this end, referring to FIG. 5, FIG. 6, and FIG. 7, the air outlet portion 10 further includes a reinforcing rib 16 disposed in the air duct 11, and both ends of the reinforcing rib 16 are fixed to the left side wall 101a and the right side of the air duct 11. Between the side walls 101b. Specifically, the reinforcing ribs 16 are disposed on the left and right side walls in the front air outlet member 14 and/or the rear air outlet member 15.

The outer casing member 30 is disposed outside the air outlet portion 10. Specifically, the outer casing member 30 is disposed outside the front air outlet member 14 and the rear air outlet member 15, and functions to beautify the fan assembly. The outer casing member 30 can be coupled to the air outlet portion 10 by bolts, screws, or snaps.

The air duct 11 has a variable cross-sectional portion, and the variable cross-sectional portion continuously changes from the bottom to the upper airflow flow area, and the corresponding airflow flow area at the lower end of the variable cross-section portion is larger than the corresponding airflow flow area at the upper end. The "continuous change" refers to the fact that there is no large change in the change value of the flow area of the air flow. For example, the variable cross-section portion is generally in the form of a large and small, and the flow area of the variable cross-section may be linearly decreasing. Small, it can also be a generally decreasing trend in a slower curve.

During the movement of the inlet gas stream from the lower end of the variable section portion to the upper end of the variable section portion, the inlet gas flow is continuously squeezed, and the gas flow rate is continuously increased to reduce the difference in the gas flow velocity from the nozzle 12 in the up and down direction, so that The airflow speed of the nozzle 12 corresponding to the vertical direction corresponding to the cross-sectional portion is relatively uniform, thereby enhancing the user's experience.

It should be noted that the "variable cross-section portion" refers to the air passage 11 in which the flow area of the airflow in the up-and-down direction of the air passage 11 is changed.

The variable cross-section portion may be located at the upper or middle portion of the air duct 11, or the upper and middle portions of the air duct 11 may have variable cross-sectional portions.

The number of the variable cross-section portions may be one; or a plurality of the plurality of variable cross-section portions may be spaced apart in the vertical direction of the air passage 11.

The variable cross-sectional portion may be formed by the inward contraction of the side wall 101 of the air outlet portion 10, for example, the left side wall 101a and/or the right side wall 101b of the air outlet portion 10 may be inclined toward the air passage 11; and/or The front side wall and/or the rear side wall of the air outlet portion 10 are inclined toward the inside of the air duct 11. The "front wall of the air outlet portion 10" is a side wall corresponding to the first side of the air outlet portion 10, and the "rear side wall of the air outlet portion 10" is a second side opposite to the first side. Corresponding side walls. Referring to FIG. 6 , in the second embodiment provided by the first embodiment, the right side wall 101 b of the air outlet portion 10 is inclined toward the inside of the air duct 11 .

The variable cross-section portion may be formed by adding a flow guiding device to the air duct 11 in the air outlet portion 10. Referring to FIG. 1 and FIG. 7 to FIG. 10, the fan head assembly further includes a flow guiding device 20 disposed in the air duct 11. The flow guiding device 20 includes a first flow guiding member 21 having a first guiding surface 21a. The first guiding surface 21a extends obliquely downward in the air passage 11 to block a part of the intake air flow. The airflow passage area of the air passage 11 corresponding to the lower end of the flow guiding surface 21a is larger than the airflow flow area of the air passage 11 corresponding to the upper end of the first flow guiding surface 21a, and between the lower end and the upper end of the first flow guiding surface 21a. The corresponding air duct 11 is a variable cross section. Further, the first flow guiding surface 21a faces the nozzle 12 to guide a part of the intake air flow from the air inlet 13 to the nozzle 12.

The first flow guiding surface 21a may be in any one direction toward the air outlet portion 10. Referring to FIG. 7 , in the third embodiment provided by the first embodiment, the first flow guiding surface 21 a faces the left side wall 101 a and/or the right side wall 101 b of the air outlet portion 10 , specifically, the first flow guiding member 21 . The first deflector 21 is located at a position close to the upper portion of the second side of the air outlet portion 10, and the first deflector 21 gradually slopes downward from the upper end of the air duct 11 . The flat periphery is sealed to the inner wall of the air outlet portion 10.

In the related art, the airflow of the bladeless fan enters the air duct from the air inlet, and is emitted obliquely upward from the nozzle at a large speed and a large injection angle, instead of blowing to the user in a horizontal direction, resulting in a poor user experience; Along the height direction of the air duct, the flow velocity of the airflow from the nozzle gradually decreases, and the jet angle of the airflow from the nozzle is smaller and smaller, and the airflow from the upper nozzle is emitted in a horizontal direction with an injection angle of almost zero, but the lower nozzle The airflow from the oblique upward direction and the airflow from the upper horizontal direction cause a turbulence, which further affects the user's experience. To this end, referring to FIG. 1 , FIG. 8 FIG. 10 , in the first embodiment, the fourth embodiment, the fifth embodiment, and the sixth embodiment in the specific embodiment of the present invention, the first flow guiding surface 21 a faces upwardly. The nozzle 12 is disposed. Under the diversion of the first flow guiding surface 21a, part of the intake air flow gradually changes the moving direction, and the vertical upward movement changes to move toward the nozzle 12, and the intake air flows from the lower end of the first flow guiding surface 21a. During the movement to the upper end of the first flow guiding surface 21a, the airflow flow area of the corresponding air duct 11 at the lower end of the first air guiding surface 21a is larger than the airflow of the corresponding air duct 11 at the upper end of the first air guiding surface 21a. The flow area is such that the intake air flow is continuously squeezed and guided toward the nozzle 12, so that part of the intake air flow can be emitted from the nozzle 12 at a small injection angle under the guiding action of the first flow guiding surface 21a, which can effectively improve the flow. The phenomenon that the airflow is emitted obliquely upward from the nozzle 12 enhances the user's experience; since the spray angle of the airflow generated by the nozzle 12 is reduced, the spoiler phenomenon can be effectively suppressed, and the user's experience is further enhanced.

The surface of the first flow guiding surface 21a should be as far as possible to avoid disturbance of the airflow by a structure such as a sharp corner. The first flow guiding surface 21a may be a flat surface or a curved surface, or may be a combination of a flat surface and a curved surface.

The position of the first flow guiding member 21 is not limited. For example, the first flow guiding member 21 may be disposed on the left side wall 101a or the right side wall 101b of the air outlet portion 10, or may be disposed in the second portion of the air outlet portion 10. The inner wall of the side, that is, the rear side wall of the air outlet portion 10, and the edge of the first flow guiding member 21 is sealingly connected to the inner wall of the second side of the air outlet portion 10. Specifically, the first flow guiding member 21 is disposed on the rear side of the rear air outlet member 15 and is sealingly connected to the inner wall of the rear side of the rear air outlet member 15, for example, an inner wall integrally formed on the rear side of the rear air outlet member 15. on. In this way, on the one hand, the structure of the fan assembly is simple and compact, and is convenient for production and processing. On the other hand, all of the intake air flow can flow through the interval between the first flow guiding member 21 and the first side of the air outlet portion 10, and the first flow guiding surface 21a can better guide the intake air flow. effect.

The number of the first flow guiding members 21 can be set according to actual needs, and may be one or more. Each of the first flow guiding members 21 corresponds to a variable cross-sectional portion. For example, referring to FIG. 1 to FIG. 5, in the first embodiment, the number of the first flow guiding members 21 is two, and the two first flow guiding members 21 are spaced apart in the vertical direction in the air passage 11. Referring to FIG. 8, in the fourth embodiment, the first flow guiding member 21 is one, and the first flow guiding member 21 has a long flat shape. The first guiding surface 21a faces the nozzle 12, and the first guiding flow is flat. The member 21 is located at a position close to the upper portion of the second side of the air outlet portion 10, and the first flow guiding member 21 gradually extends obliquely downward from the upper end of the air duct 11, and the flat periphery is sealedly connected to the inner wall of the air outlet portion 10. . It should be noted that the "flat shape" is understood to include a flat plate shape and a plate shape which is slightly curved and has a certain curvature. The extension length of the first flow guiding member 21 can be correspondingly changed according to actual needs.

The flow guiding device 20 further includes a second flow guiding member 22, the second flow guiding member 22 is located above the first flow guiding member 21, and the second guiding member 22 has a second guiding surface 22a extending obliquely upward, and the second guiding portion The lower end of the flow surface 22a is connected to the upper end of the first flow guiding surface 21a, and may be a direct connection or a smooth transition connection through an intermediate structure. For example, refer to 9, in the fifth embodiment, the flow guiding device 20 further includes a third flow guiding member 23 having a third flow guiding surface 23a, the first guiding surface 21a and the second The smooth transition connection is made between the flow guiding surfaces 22a through the third flow guiding surface 23a of the third flow guiding member 23. A smooth transition connection between the first flow guiding surface 21a, the second flow guiding surface 22a and the third flow guiding surface 23a is achieved in order to achieve a better guiding effect.

The second flow guiding surface 22a can guide the intake air flow that continues to move upward after bypassing the first flow guiding surface 21a, preventing the eddy current phenomenon from occurring at the upper position of the first flow guiding member 21.

Further, the airflow flow area of the corresponding air duct 11 from the lower end of the second air guiding surface 22a is smaller than the airflow flow area of the corresponding air duct 11 at the upper end of the second air guiding surface 22a, and the upward moving air flow is played. Buffering effect. Further, from the lower end of the second flow guiding surface 22a to the upper end of the second flow guiding surface 22a, the flow area of the corresponding air passage 11 gradually increases. That is, in the present embodiment, the airflow flow area of the air duct 11 corresponding to the guiding device gradually shrinks from the bottom to the top and then gradually expands.

The shape of the second flow guiding surface is not limited, and may be, for example, a plane, a curved surface, or a combination of a plane and a curved surface.

The position of the second flow guiding member 22 needs to match the position of the first flow guiding member 21, for example, when the first flow guiding member 21 is disposed on the rear side of the rear air outlet member 15, the second flow guiding member 22 correspondingly It is disposed on the rear side of the rear air outlet member 15.

The number of the second flow guiding members 22 is determined according to actual needs. When the number of the second flow guiding members 22 is plural, the plurality of second flow guiding members 22 are spaced apart in the vertical direction of the air passage 11. It should be noted that the first flow guiding member 21 of the present invention does not need to be disposed in one-to-one correspondence with the second flow guiding member 22, that is, the first guiding member 21 can have a second guiding member 22 matched thereto, There may be a second flow guide 22 that is not mated thereto.

It should be noted that the flow guiding device 20 may be a split structure or an integrated structure. Specifically, the first flow guiding member 21 may be a split structure or an integrated structure; the second flow guiding member 22 may be It can be a split structure or a one-piece structure. Specifically, the rear side of the first flow guiding member 21, the second flow guiding member 22 and the rear air outlet member 15 are of a unitary structure.

When there are a plurality of variable cross-section portions, a plurality of variable cross-sectional portions are spaced apart from each other in the vertical direction of the air duct 11, please refer to FIG. 1, FIG. 3, FIG. 4 and FIG. 5, and the first embodiment is taken as an example, and the embodiment of the present invention is used. The working process of the fan head assembly is as follows:

The intake air flow from the air inlet 13 enters the air passage 11, and when the intake air flow enters the first variable cross-sectional portion, that is, the first flow guiding surface 21a of the first flow guiding device 20 is encountered, the intake air flow is continuously squeezed. The airflow speed is continuously increased, and the flow velocity of the airflow from the nozzle 21 corresponding to the first variable section is relatively uniform, and the flow direction of the intake air flow is changed under the action of the first flow guiding surface 21a, so that part of the intake air flow is compared A small spray angle is emitted from the nozzle 12. The intake air flow that is not emitted from the nozzle 12 bypasses the first flow guiding surface 21a and continues to move upward to encounter the second flow guiding surface 22a. The flow area of the airflow increases, buffering the intake air flow, and the intake air flow continues to encounter upward. The first flow guiding surface 21a of the two flow guiding devices 20 is similar. The function analysis of the second flow guiding device 20 is the same as above, and will not be described herein.

In general, the airflow from the nozzle 12 near the intermediate position in the up-and-down direction of the duct 11 of the ductless fan greatly affects the user's experience. Therefore, the deflector 20 should be provided in the area.

In a specific embodiment not shown, unlike the description of the above specific embodiment, the air duct 11 includes a first end and a second end, and the air flow direction is from the first end to the second end of the air duct 11 . The direction from bottom to top in the first embodiment is the airflow direction in the specific embodiment, and FIG. 5 is taken as an example. The direction from bottom to top in FIG. 5 is the airflow direction, and the first end of the air duct is located in FIG. 5. Below, the second end of the air duct is located above Figure 5. The flow area of the variable cross-section portion along the airflow direction continuously changes, and the flow area corresponding to the end of the variable section portion near the first end is larger than the flow area corresponding to the end of the second end. That is, in the present embodiment, the direction from the bottom to the top in the above-described first embodiment is replaced with the direction of the air flow. The rest of the structure is the same as the above embodiment, and details are not described herein again.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Specific embodiment 2

The second embodiment of the present invention is described in detail below. Examples of the second embodiment are shown in FIGS. 12-22, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in different examples. This repetition is for the purpose of simplicity and clarity, and is not in the nature of the description of the various embodiments and/or arrangements discussed. Moreover, embodiments of the present invention provide examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

A handpiece 100 for a bladeless fan 1000 according to a first aspect embodiment of a second embodiment is described below with reference to FIGS. 12-22.

As shown in FIGS. 12 and 13, according to the handpiece 100 for the bladeless fan 1000 according to the first aspect of the embodiment, the air duct 11 is formed in the handpiece 100.

Specifically, as shown in FIG. 12 and FIG. 13 , the two ends of the air duct 11 in the extending direction are respectively a first end 10A and a second end 10B, wherein the first end 10A of the air duct 11 is provided with an air inlet 13 . And from the first end 10A to the second end 10B of the air duct 11 being the airflow direction, the wall of the air duct 11 is open to communicate with the air duct 11 and arranged along the direction from the first end 10A to the second end 10B. The air outlet 101, in other words, the air outlet 101 penetrates the wall of the air duct 11 in a direction perpendicular to the airflow direction, and the air outlet 101 is arranged along the airflow direction.

In addition, the first end 10A and the second end 10B of the air duct 11 have a gradation section 103, and the gradation section 103 gradually changes in the flow direction (the inner area of the section perpendicular to the airflow direction) in the airflow direction.

According to the head 100 for the bladeless fan 1000 according to the embodiment of the present invention, the gradation section 103 is provided, so that the air distribution inside the air duct 11 can be improved, and the noise can be reduced, so that the air outlet of the head 100 can be on the entire air outlet plane. It is more uniform, which effectively improves the airflow effect of the handpiece 100 and greatly improves the user experience.

The air outlet 101 may be an elongated hole extending from the first end 10A to the second end 10B, or may be a plurality of small holes spaced apart in a direction from the first end 10A to the second end 10B. Thus, the air flow can enter the air duct 11 from the first end 10A and move along the air duct 11 toward the second end 10B, and the partial air flow can be simultaneously moved from the first end 10A to the second end 10B. It is ejected through the air outlet 101.

Here, it should be noted that the gradual change refers to a non-sudden change. Wherein, a sudden change in the flow area refers to a sudden change in the flow area. For example, if a step surface (or a step surface) is provided in the air duct 11, the overcurrent area at the corresponding position of the air duct 11 suddenly changes, more specifically. Assuming that a stepped surface is provided in the M section of the air duct 11, the overcurrent area of the M section follows the direction from the first end 10A to the second end 10B, first maintaining the initial value F1 unchanged, and then suddenly changing to a value F2, Then continue to maintain the value F2 unchanged, and then suddenly change to another value F3, and then continue to maintain the value F3 unchanged, thereby indicating that the M segment of the flow area can not take any one of F1 to F2, It is also impossible to take any value from F2 to F3, and only three values of F1, F2, and F3 can be taken. Conversely, if the overcurrent area of the M segment gradually changes along the direction from the first end 10A to the second end 10B, for example, gradually changing from the value F1 to the value F3, thereby indicating that the overcurrent area of the M segment can be taken to F1~ Any value in F3. Additionally, it will be appreciated that the concept of "overcurrent area" is well known to those skilled in the art and will not be described in detail herein.

In addition, it should be noted that the air passage 11 may be a gradual change section 103 as a whole, or a part of the air passage 11 may be formed as the gradual change section 103, wherein if only a part of the air passage 11 forms a gradual change section 103, At this time, one or more sections of the air passage 11 other than the gradual section 103 do not change, and the flow area from the transition section 103 to the non-gradation section 103 is also gradual (non-mutation).

The air duct 11 can be arranged vertically, that is to say, the air duct 11 can be disposed at an absolute vertical angle of 90° with the horizontal plane, and the air duct 11 can also intersect the horizontal plane with a non-absolute vertical setting of an angle of more than 45°, the wind. The track 11 can also be set to have an angle with the horizontal plane. Thereby, a full air supply can be formed. Of course, the present invention is not limited thereto. In other embodiments of the present invention, the air duct 11 can also be horizontally disposed (the example is not shown), that is, the air duct 11 can intersect the horizontal plane at an angle of 0°. With absolute horizontal setting, the air duct 11 can also intersect the horizontal plane with a non-absolute level setting of less than 45°. In the following, the vertical arrangement of the air duct 11 is taken as an example for description. After reading the following technical solutions by those skilled in the art, it is obvious that the technical solution of the horizontal arrangement of the air duct 11 can be considered.

The ratio of the spacing of each transition segment 103 to the first end 10A (that is, the distance between the end of the transition segment 103 closest to the first end 10A and the first end 10A) and the length of the air duct 11 (Fig. 15) X1/L, X2/L shown in the figure, X3/L shown in Fig. 19, X4/L, X5/L shown in Fig. 20, and X6/L shown in Fig. 21 are 1/1 or more. 8, thereby indicating that the transition section 103 is not disposed adjacent to the first end 10A and is not in contact with the first end 10A.

The spacing between the inlet end of the gradual section 103 and the air inlet of the air duct 11 is not less than a predetermined ratio of the length of the air duct 11, wherein the predetermined ratio may be 1/8, or the predetermined ratio may be set to 1/10 to 4/5. Any value between, for example, a predetermined ratio is set to 1/8, 1/7, 1/6, 1/5, 1/4, and the like. By limiting the inlet size of the transition section 103, the uniformity of the air outlet can be effectively improved, and the diversion effect of the gradual section 103 on the air inlet can be limited, and the air outlet speed near the air inlet is prevented from being excessive. .

In some embodiments of the invention, the air duct 11 includes at least one transition section 103, and the flow area of each of the transition sections 103 gradually changes in a direction from the first end 10A to the second end 10B, and each of the transition sections 103 The overcurrent area of at least one of the sections gradually decreases in a direction from the first end 10A to the second end 10B. In other words, the gradual segment 103 includes a first sub-segment, and the first sub-segment (not shown) gradually decreases in flow direction in the direction of the airflow.

In some embodiments, one end of the first subsection extends to the first end 10A of the air duct 11, and of course, the first subsection may also be spaced apart from the first end 10A of the air duct 11, for example, the first subsection One end is disposed at a middle portion between the first end 10A and the second end 10B of the air duct 11; or the one end of the first sub-section extends to be spaced apart from the first end 10A or the second end 10B of the air duct 11 /8L, where L is the length of the air duct 11.

Of course, the above are only some specific embodiments of the present invention, and are not intended to limit the scope of the present invention.

Additionally, the other end of the first subsection may extend to the second end 10B of the air duct 11.

Of course, the other end of the first sub-section may not extend to the second end 10B of the air duct 11, in other words, the other end of the first sub-section is spaced apart from the second end 10B of the air duct 11. At this point, the second sub-segment needs to be set to achieve a smooth transition of the airflow. Specifically, the first sub-segment is spaced apart from the second end 10B of the air duct 11, and the gradual change section 103 further includes a second sub-section (not shown), one end of the second sub-section is connected to the first sub-section, and The other end of the second sub-section extends toward the second end 10B of the air duct 11, and the second sub-section gradually increases in the flow area in the direction of the air flow.

Preferably, the length of the second sub-segment in the direction of the air flow is greater than the length of the first sub-section in the direction of the air flow. In other words, the second sub-segment is more gradual relative to the first sub-segment.

Additionally, in some embodiments of the invention, the transition section 103 is directly opposite the at least a portion of the air outlet 101, that is, the transition section 103 is disposed in the area of the air duct 11 having the air outlet 101.

Moreover, the gradation section 103 can also be arranged to include a plurality of spaced apart in the direction of the airflow. For example, the gradation section 103 is provided at at least one of a midstream of the airflow direction of the air duct 11, an upstream of the airflow direction of the air duct 11, a downstream of the airflow direction of the air duct 11, and the like.

Depending on the position of the transition segment 103, the transition segment 103 can be selected to a different length to achieve a more uniform airflow. Of course, the lengths of the plurality of gradation segments 103 may also be set to be exactly the same. When there are three or more gradation segments 103, the lengths of the plurality of gradation segments 103 may be different or partially different. Wherein, the length of the gradual segment 103 refers to the dimension of the gradual segment 103 along the airflow direction.

In other words, the lengths of the plurality of gradual segments 103 are the same or different in the direction of the airflow.

In addition, when there are three or more gradation segments 103 (arranged in the airflow direction), the spacing between each adjacent two gradation segments 103 may be the same or different. For example, when you have three gradient segments, the three gradient segments are represented as A, B, and C, respectively. Wherein, the spacing between A and B is A-B, the spacing between B and C is B-C, and the spacing A-B and the spacing B-C may be the same or different. Of course, the transition segment can also be more than four.

It should be noted that the spacing between the two transition segments 103 refers to the gap between the two transition segments 103, or, in the direction of the airflow, the adjacent ends of the adjacent two transition segments 103 are in the airflow. The spacing in the direction. For example, when the airflow direction is in the up and down direction, the spacing between the two transition sections 103 refers to the spacing between the upper ends of the lower ones of the two transition sections 103 and the lower end of the upper one.

Further, the gradation section 103 in the present invention may be such that the wall of the air duct 11 is convexly formed toward the inside of the air duct 11, or may be a convex structure formed on the inner surface of the air duct 11.

For example, a convex surface that is convex toward the inside of the air duct 11 may be formed on the air duct 11 to form the gradation section 103. The convex structure 5 is provided at a position opposed to the air outlet 101 as an example.

Specifically, a convex structure 5 is formed on the inner surface between the first end 10A and the second end 10B of the air duct 11, and the convex structure 5 is opposite to at least a portion of the air outlet 101, and the convex structure 5 faces the air outlet 101. The protrusions form the tapered section 103 by the convex structure 5. The surface of the air duct 11 opposite to the air outlet 101 smoothly extends in the airflow direction.

The convex structure 5 is opposite to the air outlet 101. For example, the air outlet 101 is formed on the front side wall of the air duct 11, and the convex structure 5 is located inside the rear side wall of the air duct 11, and the convex structure 5 and the air outlet 101 are provided. Right and wrong.

Referring to Figure 16, in some embodiments of the present invention, the air duct 11 includes at least one convex structure 5, each convex structure 5 including at least a first sub-convex surface 51 that is inclined toward the air outlet 101 in the airflow direction. .

The first sub-convex surface 51 may have a planar shape, or may be a shape in which the concave surface is gradually converted into a convex surface in the airflow direction.

For example, taking the air inlet as the origin, the distance from the point on the convex structure 5 to the origin in the direction of the airflow is x, and the cross-sectional area of the section on the convex structure 5 (perpendicular to the airflow direction) is a function F(x). ), then F(x)'>0 in the first sub-convex surface, and F(x)"=0 or F(x)" changes from a positive value to a negative value (first concave kyphosis), of course, The one convex surface 51 may also be a combination of a straight surface and a curved surface (partial region F(x)" = 0, partial region F(x)" ≠ 0). Where F(x)' represents the first derivative of the function F(x) and F(x)" represents the second derivative of F(x).

In some embodiments, one end of the first sub-convex surface 51 extends to the first end 10A of the air duct 11, and of course, the first sub-convex surface 51 may also be spaced apart from the first end 10A of the air duct 11, for example, the first sub-convex surface The one end of 51 is disposed at a middle portion between the first end 10A and the second end 10B of the air duct 11; or the one end of the first sub-convex surface extends to the first end 10A or the second end 10B of the air duct 11 1/8L is spaced apart, where L is the length of the air duct 11.

In addition, the other end of the first sub-convex surface 51 may extend to the second end 10B of the air duct 11.

Of course, the other end of the first sub-convex surface 51 may not extend to the second end 10B of the air duct 11, in other words, the other end of the first sub-convex surface 51 is spaced apart from the second end 10B of the air duct 11. At this time, the second sub-convex surface 52 needs to be provided to achieve a smooth transition of the airflow. Specifically, the first sub-convex surface 51 is spaced apart from the second end 10B of the air duct 11, and the gradual change section 103 further includes a second sub-convex surface 52, and one end of the second sub-convex surface 52 is connected to the first sub-convex surface 51, and One sub-convex surface 51 and the second sub-convex surface 52 smoothly transition, and the other end of the second sub-convex surface 52 extends toward the second end 10B of the air duct 11, and the second sub-convex surface 52 is inclined in the direction of the airflow toward the direction away from the air outlet 101. .

In some embodiments, the length of the second sub-convex surface 52 in the airflow direction is greater than the length of the first sub-convex surface 51 in the airflow direction. In other words, the second sub-convex surface 52 is more gradual with respect to the first sub-convex surface 51.

The convex structure 5 is disposed on a surface of the air duct 11 away from the side of the air outlet 101 such that the air duct 11 includes at least one gradation section 103, and the flow area of each gradual section 103 is from the first end 10A to the second end The direction of 10B gradually changes, and the overcurrent area of at least one section of each of the gradual sections 103 gradually decreases in a direction from the first end 10A to the second end 10B, and the distance between each of the gradual sections 103 and the first end 10A ( That is, the ratio of the distance between the end of the gradient section 103 closest to the first end 10A and the first end 10A) to the length of the air duct 11 (X1/L, X2/L as shown in FIG. 15) X3/L shown in 19, X4/L, X5/L shown in FIG. 20, X6/L shown in FIG. 21 is greater than or equal to 1/8, thereby indicating that the gradation section 103 is not in close proximity to the first end 10A. It is set and not connected to the first end 10A.

Thereby, since the convex structure 5 is provided in the air duct 11 to occupy the space inside the air duct 11, the convex structure 5 causes a change in the flow area at the corresponding position in the air duct 11. Specifically, along the direction from the first end 10A to the second end 10B, if the space of the convex structure 5 occupies the air passage 11 gradually increases, the flow area of the air passage 11 gradually decreases, thereby flowing through The airflow speed of the section is gradually increased; and in the direction from the first end 10A to the second end 10B, if the space of the convex structure 5 occupying the air duct 11 is gradually reduced, the flow area of the air passage 11 is over the flow area. It will gradually increase, so that the velocity of the air flowing through the section will gradually decrease. Therefore, the flow parameters (such as speed, pressure, direction, etc.) of the airflow in the air duct 11 are correspondingly changed according to the shape change of the convex structure 5. For example, the convex structure 5 has a shape of a slope (i.e., a plane that is not parallel to the extended center line of the air passage 11) or a curved shape.

Therefore, the corresponding convex structure 5 can be designed in the air duct 11 according to the airflow distribution requirement, so that the air flow emitted from the air outlet 101 in the entire extending direction is uniform. More specifically, since the flow parameters (e.g., velocity, pressure, direction, etc.) of the airflow flowing through the convex structure 5 can be continuously changed without abrupt change, the problem of eddy current formation around the convex structure 5 can be improved and lowered. The disturbing resistance of the convex structure 5 to the airflow, thereby ensuring that the airflow can smoothly travel and change within the air duct 11, and reduces the aerodynamic noise.

As shown in FIG. 16, since the convex structure 5 is disposed away from the air outlet 101 and the first end 10A, when the airflow flows through the convex structure 5, the flow parameters are changed after leaving the air outlet 101 and the first end 10A. When the tuyere 101 flows out, the effectiveness of the convex structure 5 to function can be improved. Moreover, the convex structure 5 is disposed away from the air outlet 101, and the convex structure 5 is prevented from inducing eddy currents at the air outlet 101 to interfere with the problem that the airflow is normally ejected from the air outlet 101, thereby improving the reliability of the air outlet.

Thereby, the distribution of the airflow in the air duct 11 (including the speed distribution, the pressure index, the direction distribution, and the like) can be changed by adjusting the shape of the convex structure 5 in the air duct 11, thereby adjusting the airflow ejected from the air outlet 101. The speed and angle make the airflow sent by the handpiece 100 on the entire blowing plane uniform, for example, the airflow speed and angle of the head 100 shown in FIG. 12 are evenly distributed, and no up and down airflow disturbance occurs in the handpiece. The problem of convergence in front of 100 can further improve the air supply distance and air supply volume of the handpiece 100, thereby improving the user experience.

According to the handpiece 100 for the bladeless fan 1000 according to the embodiment of the present invention, by providing the convex structure 5 in the air duct 11, the airflow distribution inside the air duct 11 can be improved, and the disturbance effect of the convex structure 5 on the airflow can be reduced. The noise is reduced, so that the air outlet of the handpiece 100 can be more uniform in the entire air outlet plane, thereby effectively improving the air outlet effect of the handpiece 100 and greatly improving the user experience.

In the embodiment of the invention, the convex structure 5 may include a plurality of spaced apart in the direction of the air flow.

Depending on the position of the convex structure 5, the convex structure 5 can be selected to have different lengths, thereby achieving a more uniform airflow. Of course, the lengths of the plurality of convex structures 5 may be set to be completely the same. When there are three or more convex structures 5, the lengths of the plurality of convex structures 5 may be different or partially different. The length of the convex structure 5 refers to the dimension of the convex structure 5 in the airflow direction.

In other words, the lengths of the plurality of convex structures 5 are the same or different in the direction of the air flow.

Further, when there are three or more convex structures 5 (arranged in the airflow direction), the spacing between each adjacent two convex structures 5 may be the same or different. For example, when having three convex structures, the three convex structures are denoted as A, B, and C, respectively. Wherein, the spacing between A and B is A-B, the spacing between B and C is B-C, and the spacing A-B and the spacing B-C may be the same or different. Of course, the convex structure may be four or more.

It should be noted that the spacing between the two convex structures 5 refers to the gap between the two convex structures 5, or, in the direction of the airflow, the adjacent ends of the adjacent two convex structures 5 are in the airflow. The spacing in the direction. For example, when the airflow direction is in the up and down direction, the spacing between the two convex structures 5 means the spacing between the upper ends of the lower ones of the two convex structures 5 and the lower end of the upper one.

In some embodiments of the present invention, the convex structure 5 may be a circular arc surface or may be formed by a smooth transition connection of a plurality of circular arc surfaces (for example, by rounded transition connection), the surface of the convex structure 5 and the air passage 11 Smooth transitions (for example, by rounding transitions). Thereby, it can be ensured that the flow area of the air duct 11 at the convex structure 5 is continuously changed, and the disturbance of the air flow by the convex structure 5 can be made smaller, further reducing the possibility of generating eddy current, and ensuring that the air flow can be more smoothly in the air passage 11 Circulation inside.

In some embodiments of the present invention, as shown in FIGS. 15 and 16, the convex structure 5 may include a first sub-piece extending in a direction from the first end 10A to the second end 10B toward the air outlet 101. The convex surface and the second sub-convex surface 52 extending away from the air outlet 101 have a curved shape, and the first sub-convex surface 51 and the second sub-convex surface 52 are connected by a smooth transition of the curved surface. Of course, the present invention is not limited thereto. In other embodiments of the present invention, the first sub-convex surface 51 may also be a bevel shape and include a direction from the first end 10A to the second end 10B toward the air outlet 101. A first inclined surface extending in a direction along the inclined surface and a second inclined surface extending in a direction away from the air outlet 101 along the inclined surface.

Thereby, the flow area of the gradual section 103 where the air passage 11 is provided at the first sub-convex surface can be first decreased in the direction from the first end 10A to the second end 10B, and then increased, so that when the airflow passes out The velocity between the tuyere 101 and the first sub-convex surface may gradually increase and flow toward the air outlet 101. When the airflow passes through the transition surface between the first sub-convex surface and the second sub-convex surface 52, the second sub-portion may be followed. The convex surface 52 moves toward the direction away from the air outlet 101, and the speed is gradually reduced to gently abut against the wall surface of the air duct 11, thereby reducing airflow disturbance and buffering the airflow, thereby reducing aerodynamic noise.

In some embodiments of the present invention, as shown in FIGS. 15 and 17, the first sub-convex surfaces 51 are two and are spaced apart along the direction from the first end 10A to the second end 10B, and the two first sub- The distance between the convex surface 51 and the first end 10AA is the length of the air passage 11 (X1/L, X2/L as shown in FIG. 15), 1/6 to 2/6, and 4/6 to 5/6, respectively. The length of each of the first sub-convex surfaces 51 is the length of the air passage 11 (D1/L, D2/L as shown in Fig. 15) 1/6 to 2/6. Thereby, the airflow of the handpiece 100 is more uniform, and the air blowing effect is better.

In some embodiments of the present invention, as shown in FIG. 20 and FIG. 21, the first sub-convex surface 51 is one, and the distance between the first sub-convex surface and the first end 10A is the length of the air passage 11 (as shown in FIG. 20 and FIG. X4/L, X6/L) 1/6 to 2/6 shown in 21, and the length of the first sub-convex surface is the length of the air passage 11 (D4/L as shown in Figs. 20 and 21, D6/L) 2/6 to 4/6. Thereby, the airflow of the handpiece 100 is more uniform, and the air blowing effect is better.

Specifically, since the speed of the airflow is reduced to the middle and the downstream of the air duct 11, the first sub-convex surface is disposed in the middle and the downstream of the air duct 11, so that the airflow speed in the middle and lower reaches of the air duct 11 can be increased to make the air duct 11 The overall air outlet effect is more uniform. In addition, since the airflow moves toward the downstream after entering the air duct 11, the airflow ejected from the air outlet 101 at the upstream of the air duct 11 is ejected toward the downstream direction of the air duct 11 at a large inclination angle, and The airflow ejected from the air outlet 101 at the downstream of the air duct 11 is ejected toward the downstream direction of the air duct 11 at a small inclination angle, so that by providing the first sub-convex surface in the middle and upper reaches of the air duct 11, The inclination angle of the airflow ejected from the air outlet 101 at the upstream of the air passage 11 is reduced, so that the air outlet effect of the entire air passage 11 is more uniform. Therefore, the first sub-convex surface is respectively disposed in the middle, upper, middle and lower reaches of the air duct 11, which not only can reduce the jet angle in the middle and upper reaches, but also increase the jet velocity in the middle and lower reaches, thereby further improving the overall air outlet effect of the duct 11. Evenly. Here, it can be understood that the upstream refers to the position near the first end 10A, and the downstream refers to the position near the second end 10B.

In some embodiments of the present invention, as shown in FIGS. 19 and 20, the convex structure 5 may include a second sub-convex surface 52 having a curved shape along the second sub-convex surface 52 from the first end 10A to the second end 10B. The direction gradually extends toward the air outlet 101 and extends to the second end 10B. Thereby, the structure of the convex structure 5 is simpler and more convenient to process. Of course, the present invention is not limited thereto. In other embodiments of the present invention, the second sub-convex surface 52 may also have a bevel shape and face the direction from the first end 10A to the second end 10B toward the air outlet 101. Extend along the slope.

Preferably, the distance between the second sub-convex surface 52 and the first end 10A is the length of the air duct 11 (X3/L, X5/L as shown in FIG. 19 and FIG. 20) 2/6 to 5/6, That is, the second sub-convex surface 52 may be provided downstream of the air duct 11 (as in the third embodiment shown in FIG. 20) or from the middle and upper upstream of the air duct 11 to the downstream of the air duct 11 (implementation as shown in FIG. 19). Example 2). Thus, by providing the second sub-convex surface 52, the flow area near the downstream of the air duct 11 is gradually reduced, so that the air outlet speed downstream of the air duct 11 can be effectively increased, so that the air passage 11 is upstream and downstream. The wind speed is uniform, which improves the air output and the uniformity of the wind. Here, it can be understood that before the convex structure 5 is not disposed, the airflow velocity at the downstream of the air passage 11 is smaller than the airflow velocity at the upstream of the air passage 11, and the airflow discharge angle at the downstream of the air passage 11 is smaller than the upstream portion of the air passage 11. The airflow is ejected at an angle.

Here, it should be noted that those skilled in the art can combine and combine different embodiments or examples described in the specification and features of different embodiments or examples without contradicting each other.

A handpiece 100 in accordance with various embodiments of the present invention will now be described with reference to Figures 12-21.

Embodiment 1

The handpiece 100 includes a first air duct member 105 and a second air duct member 106. The air duct 11 is formed in each of the first air duct member 105 and the second air duct member 106. One end of the first air duct member 105 and the first air duct member 105 One end of the second air duct member 106 is connected and connected.

Wherein, the first air duct member 105 and the second air duct member 106 may be formed in an annular shape having an opening, and both ends of the annular opening are provided with air inlets.

Embodiment 2

The handpiece 100 includes a first air duct member 105 and a second air duct member 106. The air duct 11 is formed in each of the first air duct member 105 and the second air duct member 106. One end of the first air duct member 105 and the first air duct member 105 One end of the second air duct member 106 is connected by a connecting member, and the air duct 11 in the second air duct member 106 is spaced apart from the air duct 11 in the second air duct member 106.

Embodiment 3

The handpiece 100 includes a first air duct member 105, a second air duct member 106 and a connecting member 107. The first air duct member 105 and the second air duct member 106 are each formed with a duct 11, a first air duct member 105 and The second duct members 106 all extend in the up and down direction, and the first duct member 105 and the second duct member 106 are spaced apart in the left-right direction, and the first duct member 105 and the second duct member 106 are parallel to each other. Further, the lower end of the duct 11 is formed as the aforementioned first end 10A, and the upper end of the duct 11 is formed as the aforementioned second end 10B. Both ends of the connecting member are respectively connected to the upper end of the first duct member 105 and the upper end of the second duct member 106.

Embodiment 4

Referring to FIGS. 12-18, the handpiece 100 in the third embodiment may include a first joint portion 41 and a second joint portion 42, wherein the first joint portion 41 includes a first inner ring that is vertically disposed and has an inverted U shape. The first outer ring plate 412 is disposed outside the first inner ring plate 411, and the convex structure 5 is disposed in the first joint portion 41, wherein The second joint portion 42 includes a second inner ring plate 421 that is vertically disposed and has an inverted U shape, and a second outer ring plate 422 that is vertically disposed and has an inverted U shape. The second outer ring plate 422 is disposed in the second inner cover plate 422. Outside the ring plate 421, the second splicing portion 42 is spliced on the front side of the first splicing portion 41 to form the second sub air duct 11 and the first splicing portion 41 into the first air duct member 105 and the second air duct member 106. And the connecting member 107, the air outlet 101 is formed on the front side of the second joining portion 42. Thereby, the structure of the handpiece 100 is simple, and the processing of the convex structure 5 is facilitated, and the convex structure 5 can be ensured to be disposed away from the air outlet 101.

Further, referring to FIG. 12 to FIG. 19, the handpiece 100 further includes a third joint portion 43 which is vertically disposed and has an inverted U shape and is disposed outside the first joint portion 41 and the second joint portion 42. The convex structure 5 is provided on the first outer ring plate 412 and is formed inwardly recessed by the outer surface of the first outer ring plate 412. Thereby, the third splicing portion 43 can serve as a decoration, so that the overall appearance of the handpiece 100 is beautiful, and the convex structure 5 is processed and interposed between the first inner ring plate 411 and the third splicing portion 43. The first outer ring plate 412 is such that the concave recess 50 of the convex structure 5 can be blocked to improve the overall appearance of the handpiece 100.

As shown in FIG. 18, a plurality of reinforcing ribs 16 are disposed between the first inner ring plate 411 and the first outer ring plate 412, whereby the volume of the first splicing portion 41 can be ensured, and the working performance of the handpiece 100 can be improved. Work reliability. In addition, a plurality of reinforcing ribs 16 are also disposed between the second inner ring plate 421 and the second outer ring plate 422, thereby ensuring the volume of the second sub-duct 11 and improving the working performance and reliable operation of the head 100. Sex. Of course, the present invention is not limited thereto. In other embodiments of the present invention, the number of the reinforcing ribs 16 may be only one, and the reinforcing ribs 16 may also be disposed in the first splicing portion 41 or only in the second splicing. Inside the section 42.

As shown in FIG. 16, the mating faces of the first splice portion 41 and the second splice portion 42 are aligned by the slot structure 44 and ultrasonically welded at the mating portion. Thereby, assembly efficiency can be improved and sealing reliability is high, and the defect rate can be reduced. Here, it can be understood that the splicing manner of the "slot structure 44" is well known to those skilled in the art and will not be described in detail herein. In addition, after the first splice portion 41 and the second splice portion 42 are completed by the slot structure 44, they can also be connected at the screw mounting structure 45 by screws or bolts, thereby facilitating subsequent ultrasonic welding. Of course, the present invention is not limited thereto. In other embodiments of the present invention, the first splice portion 41 and the second splice portion 42 may be fixed and sealed by glue bonding.

Embodiment 5

As in the foregoing embodiment three,

As shown in FIG. 12 to FIG. 18, in the first embodiment, the air duct 11 is defined in the head 100 with two left and right non-connected tubes, wherein the middle, upper, middle and lower ends of each air duct 11 are respectively arranged. A convex structure 5 having a first sub-convex surface 51 and a second sub-convex surface 52 is disposed such that when the airflow enters each of the air ducts 11, the flow velocity can be changed through a convex structure 5, and then passes through the gentle section of the air passage 11 102, and then flow to the next first sub-convex surface 51 to change the flow rate.

Specifically, in the present embodiment, if two convex structures 5 are not provided in the air duct 11, the airflow speed is higher at the lower portion of the air duct 11 after the airflow enters the air duct 11 from bottom to top. The direction is upward, and is partially ejected from the air outlet 101. The airflow direction is obliquely upward and the angle of inclination is large, and as the airflow gradually flows upward and ejects, the airflow velocity at the upper portion of the air duct 11 is reduced, and the airflow is reduced. The inclination angle ejected from the air outlet 101 is also reduced, so that the airflow ejected from the upper air outlet 101 causes a large disturbance to the airflow ejected from the lower air outlet 101, resulting in a poor user experience and generation. Pneumatic noise.

In this embodiment, since two smooth convex structures 5 are disposed on the rear side of the air duct 11, the flow area at the corresponding position of the air passage 11 is gradually decreased and then gradually increased, resulting in airflow at the corresponding position. The speed will gradually increase and then gradually decrease. Thus, when the airflow passes through the first sub-convex surface 51 of the lower convex structure 5, the velocity of the airflow gradually increases and moves toward the air outlet 101, and is ejected at a higher speed and a lower inclination angle, while the airflow is in the airflow. When passing through the second sub-convex surface 52 of the convex structure 5, the velocity of the airflow gradually decreases and moves along the wall surface of the air duct 11 along the second sub-convex surface 52, thereby reducing the turbulence, buffering the wind speed, reducing the noise, and then After passing through the gentle section 102 of the air duct 11, the airflow passes through the first sub-convex surface 51 of the upper convex structure 5, so that the speed is gradually increased again and moves toward the air outlet 101, so that the wind speed corresponding to the air outlet 101 can be improved and improved. The wind direction of the wind can be made, so that the wind speed on the entire air outlet plane is relatively uniform, and the overall wind direction is improved obliquely, and the wind disturbance on the wind plane is reduced, and the noise is reduced. To enhance the user experience.

In summary, according to the handpiece 100 of the embodiment of the present invention, by providing different convex structures 5 in the air duct 11, the air blowing effect is greatly improved and improved compared to the case where the convex structure 5 is not provided. However, the difference in the convex structure 5 changes the wind speed and the wind direction at different positions on the wind plane. Therefore, in the design height of the air duct 11 of the present embodiment, two convex structures 5 are provided, the wind is more uniform, and the wind speed and angle are set. More comfortable and less wind and noise.

Embodiment 6

As shown in FIG. 19, this embodiment is substantially the same as the structure of the third embodiment.

Referring to FIG. 19, the convex structure 5 provided in each of the air passages 11 includes only the first sub-convex surface, and the first sub-convex surface extends from the mid-upstream of the air duct 11 to the downstream of the air duct 11. Thereby, the convex structure 5 has a simple structure, is convenient to process, and makes the flow velocity in the entire air passage 11 more uniform, thereby improving the air blowing effect of the handpiece 100.

Example 7

As shown in FIG. 20, this embodiment is substantially the same as the structure of the third embodiment.

Referring to Fig. 20, the convex structure 5 provided in each air passage 11 includes two convex structures 5, wherein one convex structure 5 extends from the middle and upper reaches of the air passage 11 to the middle and the downstream of the air passage 11, and has a first sub-convex surface 51 and a second sub-convex surface 52, the other convex structure 5 is disposed downstream of the air duct 11, and may have only the first sub-convex surface 51. Thereby, the convex structure 5 has a simple structure, is convenient to process, and makes the flow velocity in the entire air passage 11 more uniform, thereby improving the air blowing effect of the handpiece 100.

Example eight

As shown in FIG. 21, this embodiment is substantially the same as the structure of the third embodiment.

Referring to Fig. 21, each air passage 11 is provided with a convex structure 5, wherein the convex structure 5 extends from the middle and upper reaches of the air passage 11 to the middle and the downstream of the air passage 11, and this convex structure 5 has a first sub-convex surface 51 and Two sub-convex faces 52. Thereby, the convex structure 5 has a simple structure, is convenient to process, and makes the flow velocity in the entire air passage 11 more uniform, thereby improving the air blowing effect of the handpiece 100.

A bladeless fan 1000 according to an embodiment of the second aspect of the present invention will be described below with reference to FIG.

As shown in FIG. 22, a bladeless fan 1000 according to an embodiment of the second aspect of the present invention includes: a base 200, a wind making device, and a handpiece 100 according to the first aspect of the embodiment of the present invention. The head 100 is mounted on the base 200, and the air blowing device is disposed in the base 200 for supplying airflow into the air duct 11.

Of course, the present invention is not limited thereto, and the bladeless fan 1000 may further include other components. For example, in some embodiments of the specific embodiments of the present invention, an air guiding device such as a three-way device may be installed in the base 200, such that The high-speed airflow generated by the wind turbine can be diverted into the air duct 11 through the tee. In addition, other configurations of the bladeless fan 1000 according to an embodiment of the present invention, such as a control system and the like, and operations are known to those skilled in the art and will not be described in detail herein.

The bladeless fan 1000 according to the embodiment of the present invention improves the overall performance of the bladeless fan 1000 by providing the handpiece 100 of the first aspect embodiment described above.

For ease of understanding, the approximate correspondence between the above-mentioned specific embodiment 1 and some of the technical features in the second embodiment is as follows: the head is equivalent to the fan head assembly, and the first sub-section in the gradual section corresponds to the variable section portion, and the convex structure is equivalent In the flow guiding device, the first sub-convex surface is equivalent to the first flow guiding member, the second sub-convex surface is equivalent to the second flow guiding member, the first splice portion is equivalent to the rear air outlet member, and the second splice portion is equivalent to the front air outlet member. The third joint portion corresponds to the outer casing member, the air outlet corresponds to the nozzle, the wind device corresponds to the power system, and the flow area corresponds to the air flow area.

In the description of the present invention, it is to be understood that the orientations or positions of the terms "upper", "lower", "front", "back", "top", "bottom", "inner", "outside", etc. are understood. The relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplification of the description, and does not indicate or imply that the device or component referred to has a specific orientation, is constructed and operated in a specific orientation, and thus It is not to be understood as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or integrated; can be directly connected, or indirectly connected through an intermediate medium, which can be the internal communication of two elements or the interaction of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

a fan head assembly for a bladeless air blowing device, comprising an air outlet portion, the air outlet portion comprising an air inlet, a nozzle and a air duct, wherein the air inlet and the nozzle are both connected to the air duct, wherein The air passage has a variable cross-sectional portion, and the variable cross-sectional portion continuously changes from the bottom to the upper airflow flow area, and the corresponding airflow flow area at the lower end of the variable cross-section portion is larger than the corresponding airflow flow area at the upper end.
The fan head assembly of claim 1 wherein said variable cross-sectional portion is located in an upper portion and/or a middle portion of said air duct.
The fan head assembly according to claim 1, wherein a side wall of the air outlet portion is contracted from bottom to top to form the variable cross-sectional portion.
The fan head assembly according to claim 1, wherein said nozzle extends in an up-and-down direction of said air passage, said plurality of variable-section portions being plural, and said plurality of said variable-section portions along said wind The up and down direction of the track is set.
The fan head assembly of claim 1 wherein said fan head assembly includes a flow guiding device disposed within said air duct, said flow guiding device comprising a first flow guiding member, said first flow guiding The first flow guiding surface is inclined downwardly to block a part of the intake air flow, and the air flow area of the corresponding air passage at the lower end of the first flow guiding surface is larger than the first flow guiding The airflow passage area of the corresponding air duct at the upper end of the surface, and the corresponding air passage between the lower end and the upper end of the first flow guiding surface is the variable cross-sectional portion.
The fan head assembly according to claim 5, wherein said first flow guiding member has a plate shape, and said first flow guiding member extends obliquely downward from an upper end of said air passage.
The fan head assembly of claim 6 wherein said first flow guiding surface faces toward said nozzle to direct a portion of the intake air flow to said nozzle.
The fan head assembly according to claim 7, wherein the nozzle is disposed on a first side of the air outlet portion, and the first flow guiding member is disposed on a first side of the air outlet portion opposite to the first side On both sides, an edge of the first deflector is sealingly connected to an inner wall of the second side of the air outlet.
The fan head assembly according to claim 6, wherein the first flow guiding surface faces the side wall of the air outlet portion, the edge of the first flow guiding member and the side of the air outlet portion Wall sealed connection.
A fan head assembly according to any one of claims 5-9, wherein the flow guiding device further comprises a second flow guiding member above the first flow guiding member, the second flow guiding member having a slope a second flow guiding surface extending upward, a lower end of the second flow guiding surface is connected to an upper end of the first flow guiding surface, and an air flow area of the air duct at a lower end of the second flow guiding surface is smaller than The airflow area of the air duct at the upper end of the second air guiding surface.
The fan head assembly according to claim 10, wherein the second flow guiding surface is a plane, a curved surface, or a combination of a plane and a curved surface; and/or the first flow guiding surface is a plane, Arc face, or a combination of plane and arc.
The fan head assembly according to claim 10, wherein a flow area of the corresponding air passage gradually increases from a lower end of the second flow guiding surface to an upper end of the second flow guiding surface.
A fan head assembly according to claim 12, wherein said flow guiding means comprises a third flow guiding member, said third flow guiding member having a third flow guiding surface, said second flow guiding surface passing through The third flow guiding surface is smoothly connected with the first flow guiding surface.
The fan head assembly according to claim 5 or 7, wherein the air outlet portion comprises a front air outlet member and a rear air outlet member, wherein the front air outlet member and the rear air outlet member together define the wind The nozzle is disposed on a front side of the front air outlet, and the flow guiding device is sealingly connected to a rear side of the rear air outlet.
The fan head assembly of claim 14 wherein said flow guiding means and said rear air outlet member are of unitary construction.
The fan head assembly according to claim 14, wherein one of the front air outlet member and the rear air outlet member is provided with a positioning card slot, and the other portion is provided with the positioning card slot. Positioning protrusions, and the front air outlet member and the rear air outlet member are connected by ultrasonic welding or by gluing.
The fan head assembly of claim 14 wherein said fan head assembly further comprises a housing member, said housing member being disposed outside said vent portion.
The fan head assembly according to claim 7, wherein a flow area of the corresponding air passage gradually decreases from a lower end of the first flow guiding surface to an upper end of the first flow guiding surface.
The fan head assembly according to claim 7, wherein the air outlet portion further comprises a reinforcing rib disposed in the air duct, both ends of the reinforcing rib and the left and right sides of the air duct The inner wall is fixedly connected.
The fan head assembly according to claim 7, wherein said nozzle extends in an up-and-down direction of said air passage, said number of said flow guiding means being plural, and said plurality of said flow guiding means are along said wind The upper and lower sides of the track are spaced apart, and a plurality of the flow guiding devices are disposed corresponding to the nozzles.
A fan head assembly for a bladeless air blowing device, comprising an air outlet portion, the air outlet portion comprising an air inlet, a nozzle and a air duct, wherein the air inlet and the nozzle are both in communication with the air duct, The air duct includes a first end and a second end, and the air flow direction is from the first end to the second end of the air duct, wherein the air duct includes a variable cross section, and the variable cross section The flow area of the airflow in the direction of the airflow continuously changes, and an airflow flow area corresponding to an end of the variable section portion close to the first end is larger than a flow area corresponding to an end of the second end.
The fan head assembly according to claim 21, wherein said variable cross-sectional portion is formed by inward contraction of a side wall of said air outlet portion.
The fan head assembly according to claim 21, wherein said nozzle extends in a direction of airflow of said duct, said plurality of variable section portions being plural, and said plurality of said variable section portions along said wind The airflow direction of the track is set at intervals.
A fan assembly according to claim 21, wherein said fan assembly includes a flow guiding device disposed in said air duct, said flow guiding device comprising a first flow guiding member, said first flow guiding The piece has a first flow guiding surface, and the first flow guiding surface extends obliquely with respect to the airflow direction to block a part of the intake air flow, and the air passage at the corresponding position of the first flow guiding surface is the variable cross-sectional portion.
The fan head assembly of claim 24 wherein said first flow guiding surface faces toward said nozzle to direct a portion of the intake air flow to said nozzle.
A fan assembly according to claim 24, wherein said flow guiding means further comprises a second flow guiding member located adjacent said second end of said first flow guiding member, said second flow guiding member having a relative a second flow guiding surface extending obliquely from the air flow direction, wherein the second flow guiding surface is connected to the first flow guiding surface, and an end of the second flow guiding surface adjacent to the first flow guiding surface corresponds to The airflow area of the air duct is smaller than the airflow area of the air duct corresponding to the end of the second air guiding surface that is away from the first air guiding surface.
The fan head assembly according to claim 26, wherein an air flow area of said air passage corresponding to said second flow guiding surface is gradually increased in said air flow direction.
A bladeless air blowing device, comprising: a base, a power system disposed in the base; and the fan head assembly according to any one of claims 1 to 27, wherein the fan head assembly is coupled to the base Receiving an intake air flow generated by the power system through the air inlet and emitting the intake air flow through the nozzle.
The leafless blowing device according to claim 28, wherein the bladeless blowing device is any one of a bladeless fan, a bladeless blower, a bladeless heater, a leafless humidifier, and a bladeless air cooler. Kind.
A machine head for a bladeless fan, wherein a wind channel is formed in the handpiece, the air channel has a first end and a second end, and the first end of the air channel is provided with an air inlet a direction of airflow from a first end to a second end of the air duct, the wall of the air duct being provided with an air outlet opening through a wall of the air duct in a direction perpendicular to the airflow direction, The air outlets are arranged along the air flow direction,

Wherein, between the first end and the second end of the air duct, there is a gradual change section in which the flow area is gradually changed in the direction of the air flow.
A handpiece for a bladeless fan according to claim 30, wherein said gradual section comprises a first subsection, said first subsection gradually decreasing in area of said flow direction.
A handpiece for a bladeless fan according to claim 31, wherein one end of said first subsection extends to or is spaced apart from a first end of said air duct The other end of the first subsection extends to the second end of the air duct.
The handpiece for a bladeless fan according to claim 31, wherein the first sub-segment is spaced apart from the second end of the air duct, and the gradual change segment further comprises:

a second subsection, one end of the second subsection is connected to the first subsection, and the other end of the second subsection is extended toward a second end of the air duct, and the second subsection The flow area increases gradually in the direction of the gas flow.
A handpiece for a bladeless fan according to claim 33, wherein a length of said second sub-section in said air flow direction is greater than a length of said first sub-section in said air flow direction.
A handpiece for a bladeless fan according to any one of claims 30-34, wherein the gradual section is directly opposite to at least a portion of the air outlet.
A handpiece for a bladeless fan according to any one of claims 30 to 34, wherein the wall of the duct is convex toward the inside of the duct to form the gradation section.
A bladeless fan head according to any one of claims 30 to 34, wherein said gradation section comprises a plurality of spaced apart in the direction of said air flow, and in said direction of said air flow The lengths of the transition segments are the same.
A bladeless fan head according to claim 37, wherein said gradation section comprises at least three spaced apart in said airflow direction, and each of said at least three of said transition sections The spacing between them is the same.
A handpiece for a bladeless fan according to any one of claims 30-34, wherein the handpiece comprises:

First air duct piece; and

a second air duct member, wherein the air duct is formed in the first air duct member and the second air duct member.

One end of the first air duct member is connected to and communicated with one end of the second air duct member; or one end of the first air duct member and one end of the second air duct member are connected by a connecting member and The air duct in the first air duct member is spaced apart from the air duct in the second air duct member.
A noseless fan head according to any one of claims 30-34, wherein the handpiece comprises:

a first air duct member, the first air duct member extending in an up and down direction;

a second air duct member, the second air duct member extends in an up and down direction, and the first air duct member and the second air duct member are arranged side by side and parallel to each other;

a connecting member, the two ends of the connecting member are respectively connected to the upper end of the first air duct member and the upper end of the second air duct member,

An air duct is formed in the first air duct member and the second air duct member, and a lower end of the air duct is the first end, and an upper end of the air duct is the second end. end.
A leafless fan, comprising:

Pedestal

a handpiece, the handpiece for a bladeless fan according to any one of claims 30-40 and mounted on the base;

A wind making device is disposed in the base and configured to supply airflow into the air duct.