阅读说明：本技术 无叶风扇 (Bladeless fan ) 是由 杨勇争 黄振杰 刘伟军 于 2020-07-06 设计创作，主要内容包括：本发明涉及一种无叶风扇,包括喷嘴组件,所述喷嘴组件包括两个相对设置的出风部,所述喷嘴组件内设置有扩散风切换组件,所述扩散风切换组件包括拉板和活动设置在所述拉板上的拉杆,所述拉板可上下移动,所述拉杆可将所述拉板的上下移动转化为向着所述出风口移动,所述拉杆两端均固定设置有启闭板,所述启闭板与所述出风部对应设置,所述启闭板可向着所述出风部移动并封闭所述出风部。本发明无叶风扇通过在喷嘴组件上设置两个出风部,并设置有扩散风切换组件,扩散风切换组件能够根据实际需要对出风部进行切换,从而对喷嘴组件的出风方向进行改变,提高使用便捷性。(The invention relates to a bladeless fan which comprises a nozzle assembly, wherein the nozzle assembly comprises two air outlet parts which are oppositely arranged, a diffused air switching assembly is arranged in the nozzle assembly, the diffused air switching assembly comprises a pull plate and a pull rod movably arranged on the pull plate, the pull plate can move up and down, the pull rod can convert the up-and-down movement of the pull plate into movement towards an air outlet, opening and closing plates are fixedly arranged at two ends of the pull rod, the opening and closing plates are arranged corresponding to the air outlet parts, and the opening and closing plates can move towards the air outlet parts and close the air outlet parts. According to the bladeless fan, the two air outlet parts are arranged on the nozzle assembly, and the diffused air switching assembly is arranged, so that the diffused air switching assembly can switch the air outlet parts according to actual needs, the air outlet direction of the nozzle assembly is changed, and the use convenience is improved.)

1. The utility model provides a bladeless fan, includes nozzle assembly, its characterized in that, nozzle assembly includes the air-out portion of two relative settings, be provided with diffusion wind switching module in the nozzle assembly, diffusion wind switching module includes that arm-tie and activity set up pull rod on the arm-tie, the arm-tie can reciprocate, the pull rod can with reciprocating of arm-tie turn into towards the air outlet removes, the pull rod both ends are all fixed and are provided with the board of opening and shutting, open and shut the board with the air-out portion corresponds the setting, open and shut the board can towards the air-out portion removes and seals air-out portion.

2. The bladeless fan of claim 1, comprising a deflector assembly and a wind wheel assembly disposed below the nozzle assembly, the deflector assembly in communication with the wind wheel assembly and the nozzle assembly, respectively.

3. The bladeless fan according to claim 2, wherein the nozzle assembly comprises a nozzle inner casing and a nozzle outer casing covering the nozzle inner casing, an air accommodating cavity for accommodating the diffusive air switching assembly is formed between the nozzle inner casing and the nozzle outer casing in a matching manner, and the diffusive air switching assembly is fixed on the nozzle inner casing.

4. The bladeless fan according to claim 3, wherein the opening and closing plate and the nozzle inner housing are cooperatively formed with a first air outlet channel and a second air outlet channel, the first air outlet channel and the second air outlet channel are respectively communicated with different air outlets, and the opening and closing plate can abut against the nozzle inner housing to close the air outlet channels.

5. The bladeless fan according to claim 4, wherein the nozzle inner housing includes a first nozzle and a second nozzle that are coupled to each other, the shutter includes a first shutter located at the first nozzle, the first air outlet channel includes a first air outlet section and a second air outlet section, the first air outlet section is formed by the first shutter and the first nozzle in a matching manner, the second air outlet section is formed on the first nozzle and is communicated with the air outlet portion, and the first shutter can abut against the first nozzle to block the first air outlet section.

6. The bladeless fan according to claim 5, wherein the second air outlet channel includes a third air outlet section and a fourth air outlet section, the shutter includes a second shutter located at the second nozzle, the second nozzle is provided with an air guide plate, the second shutter and the air guide plate cooperate to form the third air outlet section, the fourth air outlet section is formed on the second nozzle and is communicated with the outside, and the second shutter can abut against the air guide plate to block the third air outlet section.

7. The bladeless fan of claim 6, wherein the third air outlet section is arranged obliquely so as to change and enlarge an air outlet angle of the fourth air outlet section.

8. The bladeless fan of claim 3, wherein the nozzle inner housing and the nozzle outer housing are a plug fit.

9. The bladeless fan of claim 1, comprising a top housing assembly disposed above the nozzle assembly, the top housing assembly threadably mating with the nozzle assembly.

10. The bladeless fan of claim 2, wherein a first seal ring and a second seal ring are disposed between the deflector assembly and the fan wheel assembly to seal a junction therebetween.

Technical Field

The invention relates to a fan, in particular to a bladeless fan.

Background

Compared with the traditional electric fan with the fan blades, the bladeless fan has the characteristics of low noise, safety and the like. The basic structure of the bladeless fan comprises a nozzle assembly, an air wheel assembly and a base, wherein the nozzle assembly of the bladeless fan is generally only provided with an air outlet, and air flow generated by the air wheel assembly is blown out along the air outlet of the nozzle assembly. However, the air outlet can only blow air to the front of the air outlet, and the whole machine body needs to be rotated when the air outlet direction needs to be adjusted, so that inconvenience is brought to users in daily life.

Disclosure of Invention

The invention aims to provide a bladeless fan, which can adjust the air outlet direction according to actual requirements.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a bladeless fan, includes nozzle assembly, nozzle assembly includes the air-out portion of two relative settings, be provided with diffusion wind switching module in the nozzle assembly, diffusion wind switching module includes that arm-tie and activity set up pull rod on the arm-tie, the arm-tie can reciprocate, the pull rod can with reciprocating of arm-tie turn into towards the air outlet removes, the pull rod both ends are all fixed and are provided with the board of opening and shutting, open and shut the board with the air-out portion corresponds the setting, open and shut the board can towards the air-out portion removes and seals air-out portion.

Further, the bladeless fan comprises a flow deflector assembly and a wind wheel assembly which are arranged below the nozzle assembly, and the flow deflector assembly is communicated with the wind wheel assembly and the nozzle assembly respectively.

Furthermore, the nozzle assembly comprises a nozzle inner shell and a nozzle outer shell covering the nozzle inner shell, an air accommodating cavity for accommodating the diffused air switching assembly is formed between the nozzle inner shell and the nozzle outer shell in a matched mode, and the diffused air switching assembly is fixed on the nozzle inner shell.

Furthermore, the opening and closing plate and the nozzle inner shell are matched to form a first air outlet channel and a second air outlet channel, the first air outlet channel and the second air outlet channel are respectively communicated with different air outlet parts, and the opening and closing plate can abut against the nozzle inner shell to close the air outlet channels.

Furthermore, the nozzle inner shell comprises a first nozzle and a second nozzle which are connected with each other in a matched mode, the opening and closing plate comprises a first opening and closing plate located at the first nozzle, the first air outlet channel comprises a first air outlet section and a second air outlet section, the first air outlet section is formed by matching the first opening and closing plate and the first nozzle, the second air outlet section is formed on the first nozzle and communicated with the air outlet portion, and the first opening and closing plate can be abutted to the first nozzle to block the first air outlet section.

Furthermore, the second air outlet duct comprises a third air outlet section and a fourth air outlet section, the opening and closing plate comprises a second opening and closing plate located at the second nozzle, an air deflector is arranged on the second nozzle, the second opening and closing plate and the air deflector are matched to form the third air outlet section, the fourth air outlet section is formed on the second nozzle and communicated with the outside, and the second opening and closing plate can be abutted against the air deflector to block the third air outlet section.

Furthermore, the third air outlet section is obliquely arranged to change and enlarge the air outlet angle of the fourth air outlet section.

Further, the nozzle inner shell and the nozzle outer shell are in plug-in fit.

Furthermore, the bladeless fan comprises a top shell assembly arranged above the nozzle assembly, and the top shell assembly is matched and connected with the nozzle assembly in a screwing mode.

Furthermore, a first sealing ring and a second sealing ring which are used for sealing the joint of the deflector assembly and the wind wheel assembly are arranged between the deflector assembly and the wind wheel assembly.

The invention has the beneficial effects that: according to the bladeless fan, the two air outlet parts are arranged on the nozzle assembly, the diffused air switching assembly is arranged on the nozzle inner shell of the nozzle assembly, and the diffused air switching assembly can switch the air outlet parts according to actual needs, so that the air outlet direction of the nozzle assembly is changed, and the use convenience is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is an overall exploded view of the bladeless fan according to the present invention.

Fig. 2 is a cross-sectional view of the bladeless fan of the present invention.

Fig. 3 is a partially enlarged view of fig. 2 at the bladeless fan a.

Fig. 4 is a partial enlarged view of the bladeless fan of fig. 2 at B.

Fig. 5 is a partial enlarged view of the fig. 2 bladeless fan at C.

Fig. 6 is a cross-sectional view in another direction of the bladeless fan according to the present invention.

Fig. 7 is an enlarged view of a portion of the fig. 6 bladeless fan at D.

FIG. 8 is a schematic structural view of an inner casing of a bladeless fan nozzle according to the present invention.

Fig. 9 is an exploded view of the inner housing of the nozzle of fig. 8.

Fig. 10 is a schematic structural view of a second support base of the bladeless fan of the present invention.

Fig. 11 is a schematic structural view of a nozzle support plate of the bladeless fan according to the present invention.

Fig. 12 is an exploded view of the nozzle housing and top case assembly of the bladeless fan of the present invention.

Fig. 13 is an exploded view of the diffusion air switching assembly of the bladeless fan of the present invention.

Fig. 14 is a schematic structural view of a tie rod of the diffusive wind switching assembly of fig. 13.

Fig. 15 is an exploded view of the top case assembly of the bladeless fan of the present invention.

Fig. 16 is a schematic view of the top housing shell of the top housing assembly of fig. 15.

Fig. 17 is an exploded view of the fan wheel assembly and deflector assembly of the bladeless fan according to the present invention.

Fig. 18 is a cross-sectional view of the deflector assembly of fig. 17.

Fig. 19 is an installation schematic of the sealing ring compression ring and deflector housing of the deflector assembly of fig. 17.

Fig. 20 is an enlarged partial view of the deflector assembly of fig. 18 at E.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, a bladeless fan according to a preferred embodiment of the present invention includes a base 7, a wind wheel assembly 200, a deflector assembly 6, a nozzle assembly 100, and a top case assembly 4. The top case assembly 4, the nozzle assembly 100, the deflector assembly 6, and the wind wheel assembly 200 are sequentially disposed on the base 7 from top to bottom. Nozzle assembly 100 includes diffused air switches subassembly 3, is provided with first air-out portion 101 and second air-out portion 102 on nozzle assembly 100, and diffused air switches subassembly 3 can switch first air-out portion 101 or second air-out portion 102 to make one of them air-out portion air-out. The airflow blown out by the wind wheel assembly 200 enters the nozzle assembly 100 along the deflector assembly 6 and is blown out from one of the air outlet portions. Preferably, the first air outlet portion 101 and the second air outlet portion 102 are arranged oppositely.

As shown in fig. 2 and 6, the nozzle assembly 100 includes a nozzle inner casing 1 and a nozzle outer casing 2 covering the outside of the nozzle inner casing 1. An air containing cavity 103 which is sealed relative to the outside is formed between the inner wall of the nozzle inner shell 1 and the outer wall of the nozzle outer shell 2 in a matching way, and the flow guide component 6 is communicated with the air containing cavity 103. The nozzle inner shell 1 is provided with a first air outlet 104a and a second air outlet 105a which are communicated with the air accommodating cavity 103, the nozzle outer shell 2 is provided with a first air guide hole 211 corresponding to the first air outlet 104a and a second air guide hole 221 corresponding to the second air outlet 105a, the first air outlet 104a and the first air guide hole 211 are matched to form a first air outlet part 101 of the nozzle assembly 100, and the second air outlet 105a and the second air guide hole 221 are matched to form a second air outlet part 102. In the present embodiment, the air outlet directions of the first air guiding hole 211 and the second air guiding hole 221 are parallel to the horizontal plane (ground).

The diffused air switching component 3 is movably arranged on the nozzle inner shell 1 and is contained in the air containing cavity 103, and the diffused air switching component 3 is matched with the nozzle inner shell 1 to form a first air outlet channel 104 and a second air outlet channel 105. The first air outlet 104a is located on the first air outlet duct 104, the second air outlet 105a is located on the second air outlet duct 105, and the air diffusing switching assembly 3 can move towards the direction close to the first air outlet 104a or the direction close to the second air outlet 105a, so that the air diffusing switching assembly can selectively block the first air outlet duct 104 or the second air outlet duct 105, and the switching of air outlet is realized. Indeed, the diffuse air switching component 3 may also be located in the middle of the first air outlet 104a and the second air outlet 105a, so that the first air outlet 104 and the second air outlet 105 are both turned on.

Preferably, in this embodiment, the nozzle assembly 100 is a circular truncated cone-shaped structure, so that the bladeless fan is more round and smooth in whole, edges and corners are reduced, and a user is prevented from colliding in the use process. In addition, the circular truncated cone-shaped nozzle assembly 100 enables the air containing cavity 103 to have no corner, and the fluency and the air guiding performance are better. In other embodiments, the nozzle assembly 100 may alternatively have other profile configurations, and the invention is not limited thereto.

As shown in fig. 2 to 4, 8 and 9, the nozzle inner casing 1 includes a first nozzle 11, a second nozzle 12, a first support seat 13 and a second support seat 14. The first nozzle 11 and the second nozzle 12 are coupled to form an air guide channel 106, and both ends of the air guide channel 106 are communicated with the outside through a first air guide hole 211 and a second air guide hole 221. When the airflow generated in the fan is blown out from the first outlet 104a or the second outlet 105a, it can guide the external air to flow together along the air guide channel 106. The first support seat 13 and the second support seat 14 are respectively connected with the upper end and the lower end of the first nozzle 11 and the second nozzle 12 and are used for supporting and fixing the first nozzle 11 and the second nozzle 12. The inner wall of the bottom of the nozzle shell 2 is attached to the outer wall of the first support seat 13, and the inner wall of the top of the nozzle shell 2 is attached to the outer wall of the second support seat 14. For convenience of description, in the present embodiment, an end of the bladeless fan blowing out from the first nozzle 11 is referred to as a first air outlet end 10, and an end of the bladeless fan blowing out from the second nozzle 12 is referred to as a second air outlet end 20.

The bottom and the top of the first nozzle 11 are fixedly connected with the first supporting seat 13 and the second supporting seat 14 respectively. As shown in fig. 2 to 4, the first nozzle 11 includes a first nozzle body 111 and first mating parts 112 protruding outward with respect to side walls of both sides of the first nozzle body 111. The first nozzle body 111 is provided with a first air guiding channel 111a penetrating along the direction from the first air outlet end 10 to the second air outlet end 20. The cross section of the first air guiding channel 111a is in an annular structure, the upper end and the lower end of the first air guiding channel 111a extend to the upper end and the lower end of the first nozzle main body 111 respectively, and one end of the first air guiding channel 111a close to the first air outlet end 10 is communicated with the outside through a first air guiding hole 211. The first nozzle body 111 includes a first end surface 111b facing the second outlet end 20, the first end surface 111b is provided with a protrusion 1111 for being inserted into the second nozzle 12, and the protrusion 1111 protrudes outward relative to the first end surface 111 b. In the present embodiment, the projection 1111 is an annular projection provided along the profile of the end face.

The first mating portion 112 is located on the first nozzle main body 111 near the first air outlet end 10, and the first mating portion 112 is adapted to mate with the nozzle housing 2. Specifically, the first mating portion 112 is provided with a first insertion slot 1121 which is recessed inwards, the first insertion slot 1121 is formed by extending downwards from the upper end of the first mating portion 112, and the first insertion slot 1121 is inserted into and matched with the nozzle housing 2. Preferably, the first coupling portions 112 are symmetrically disposed at both sides of the first nozzle body 111, so that the first insertion grooves 1121 are disposed at both sides of the first air guiding passage 111a, thereby supporting the first air guiding passage 111a and preventing the first air guiding passage 111a from being deformed.

The first nozzle 11 and the diffused air switching member 3 cooperate to form a first air outlet duct 104. Specifically, the first mating portion 112 includes a mating portion end surface 112a, a first air outlet section 1041 of the first air outlet duct 104 is formed between the mating portion end surface 112a and the diffuse air switching assembly 3, and a second air outlet section 1042 is disposed at a connection position of the first mating portion 112 and the first nozzle main body 111. The first air outlet section 1041 and the second air outlet section 1042 are combined into an integral first air outlet duct 104. In other embodiments, the second air outlet section 1042 can also be formed on the first nozzle body 111 separately, which is not limited herein. The airflow sequentially flows through the first air outlet section 1041, the second air outlet section 1042 and the first air outlet 104a and flows out along the first air guiding hole 211. Preferably, the air outlet direction of the first air outlet duct 104 is parallel to the hole wall of the first air guiding hole 211, so that the air flow can flow out along the hole wall of the first air guiding hole 211, and the air flow flowing-out distance is longer.

Preferably, the number of the first air outlets 104 is two, and the first air outlets are symmetrically disposed on both sides of the first nozzle body 111, so that the air can be simultaneously blown out from both sides of the first air guiding channel 111a, and further, the external air is guided to be blown out from the first air guiding channel 111a to the first air outlet end 10 along with the internal air. Preferably, the second air outlet section 1042 of the first air outlet duct 104 is provided with a plurality of first ribs 113, and two ends of the first ribs 113 are respectively connected to the first mating portion 112 and the first nozzle body 111. Through setting up first strengthening rib 113, it can support first exhaust passage 104, avoids first exhaust passage 104 exit to warp.

The bottom and the top of the second nozzle 12 are fixedly connected with the first supporting seat 13 and the second supporting seat 14 respectively. As shown in fig. 2, 3, and 5, the second nozzle 12 has substantially the same structure as the first nozzle 11. The second nozzle 12 includes a second nozzle body 121 and second coupling parts 122 protruding outward with respect to both sides of the second nozzle body 121. The second nozzle body 121 is provided with a second air guiding channel 121a penetrating along the direction from the second air outlet end 20 to the first air outlet end 10, and one end of the second air guiding channel 121a close to the second air outlet end 20 is communicated with the outside through a second air guiding hole 221. The second air guiding channel 121a has the same structure as the first air guiding channel 111a, and the description of the present invention is omitted here. The second nozzle body 121 includes a second end surface 121b facing the first air outlet end 10, and the second end surface 121b is provided with a first groove 1211 recessed inwards relative to the second end surface 121 b. In the present embodiment, the first groove 1211 is an annular groove provided along the end surface profile. The convex portion 1111 of the first nozzle 11 is inserted into the first concave portion 1211, so that the first nozzle 11 and the second nozzle 12 are connected, and the first air guiding passage 111a and the second air guiding passage 121a are coupled to form the complete air guiding passage 106. When the air in the fan is blown out from the first outlet 104a or the second outlet 105a, the external air can be guided by the air guiding channel 106 to blow toward the first outlet 10 or the second outlet 20 together with the internal air, so as to improve the blowing area and the blowing effect. Preferably, in order to prevent the first nozzle 11 and the second nozzle 12 from being separated from each other, as shown in fig. 9, the first nozzle 11 and the second nozzle 12 are provided with hooks 107 bent upward near the mating portions, and locking plates 114 for limiting the separation of the first nozzle 11 and the second nozzle 12 are hung on the hooks 107. Specifically, the end surface of the locking plate 114 is provided with a hooking hole 1141, the height of the hooking hole 1141 is higher than the height from the bottom surface to the top surface of the hook 107, the width of the hooking hole 1141 is equal to or slightly larger than the maximum width between the two hooks 107, and the side wall of the hook 107 is limited in the hooking hole 1141. After the first nozzle 11 and the second nozzle 12 are inserted, the locking plate 114 is hung on the hook 107, and the locking plate 114 can limit the horizontal movement of the first nozzle 11 and the second nozzle 12. Preferably, in the present embodiment, the hooks 107 are provided in a plurality and spaced from the upper end to the lower end of the first nozzle body 111 and the second nozzle body 121, so as to ensure that the first nozzle 11 and the second nozzle 12 are locked up and down. Preferably, in order to improve the stable connection between the locking plate 114 and the first nozzle body 111 and the second nozzle body 121, after the locking plate 114 is hooked, the locking plate 114 may be fastened to the first nozzle body 111 or the second nozzle body 121 by using a fastening member, which is common knowledge in the art and will not be described herein again.

The second mating portion 122 is provided with second slots 1221 which are recessed inwards, and the structure and number of the second slots 1221 are the same as those of the first slots 1121, so that the second nozzle 12 can be tightly fitted to the nozzle housing 2, and at the same time, the second air guiding channel 121a can be supported. The bottom and the top of the second nozzle 12 are respectively and fixedly connected with the first supporting seat 13 and the second supporting seat 14, and the specific connection manner can refer to the connection structure of the first nozzle 11 and the first supporting seat 13 and the second supporting seat 14, which is not described herein again.

The second nozzle 12 and the diffused wind switching component 3 are matched to form a second wind outlet channel 105, the number of the second wind outlet channels 105 is two, and the second wind outlet channels 105 are symmetrically arranged on two sides of the second nozzle main body 121, so that the wind can be blown out from two sides of the second wind guide channel 121a at the same time, and the external wind is guided to be blown out to the second wind outlet end 20 along with the internal wind by the second wind guide channel 121 a. The second air outlet channel 105 includes a third air outlet section 1051 and a fourth air outlet section 1052, and the specific structure thereof can be referred to the description of the first air outlet channel 104, which is not described herein again. Preferably, in this embodiment, the air outlet direction of the second air outlet channel 105 is inclined to the wall of the second air guiding hole 221, so that the air flow blown out through the second air guiding channel 121a is more diffused, and the blowing area is increased. Specifically, in the present embodiment, the fourth air-out section 1052 of the second air outlet duct 105 is disposed on the sidewall of the second nozzle main body 121, and the fourth air-out section 1052 is inclined towards the middle of the second air guiding hole 221. In order to further increase the inclination of the airflow flowing out of the fourth wind-out section 1052, the third wind-out section 1051 is also inclined towards the middle of the second wind guiding hole 221. Specifically, the second nozzle 12 further includes an air deflector 123 disposed on the second nozzle body 121, the air deflector 123 is provided with a guide portion 1231 inclined toward the middle of the second air guiding hole 221, the guide portion 1231 is matched with the diffusive air switching assembly 3 to form a third air outlet section 1051, and the air flow is blown to the outside along the inclined third air outlet section 1051 and the inclined fourth air outlet section 1052 toward two sides of the second air guiding hole 221, so that the air flow blowing area is wider. In the present embodiment, the inclination angle of the guide portion 1231 is 30 ° to 60 °. The number of the air deflectors 123 is two, and the air deflectors are symmetrically disposed on two sides of the second nozzle body 121, so as to cooperate with the two second air outlets 105 on two sides of the second nozzle body 121. The fourth air-out section 1052 is also provided with a plurality of first strengthening ribs 113 arranged at intervals, which can support the second air-out duct 105 and avoid the deformation of the outlet of the second air-out duct 105.

The upper end surface of the first supporting seat 13 is provided with two second grooves 132, the number of the second grooves 132 is two, the two second grooves 132 are oppositely arranged, and the bottom parts of the first nozzle 11 and the second nozzle 12 are respectively embedded in the two second grooves 132, so that the first nozzle 11 and the second nozzle 12 are positioned.

As shown in fig. 6 and 8, the first support base 13 is covered outside the wind wheel assembly 200 and the deflector assembly 6. The middle position of the upper end surface of the first support seat 13 is provided with a boss 133, the boss 133 is of a hollow structure, an air supply channel 1331 is formed in the boss 133, air blown out by the air wheel assembly 200 enters the air accommodating cavity 103 through the air supply channel 1331, and is divided by the nozzle inner shell 1 and then blown out from the first air outlet channel 104 or the second air outlet channel 105.

Preferably, in order to improve the smoothness of the air flowing into the air accommodating cavity 103, a guide plate 15 is arranged at the bottom of the nozzle inner shell 1 corresponding to the air outlet of the deflector assembly 6, and the lower part of the guide plate 15 is of an arc-shaped structure and is bent towards the middle of the boss 133. The guide plates 15 are two and symmetrically arranged on two sides of the nozzle inner shell 1, and when the gas in the flow guide device assembly 6 flows out from the air supply channel 1331, the guide plates 15 can guide the gas, so that the gas flow is smoother, and abnormal noise is avoided.

As shown in fig. 10, two positioning portions 142 protruding downward are disposed on the lower end surface of the second support seat 14 corresponding to the first nozzle 11 and the second nozzle 12, the positioning portions 142 are provided with third grooves 143 matching with the top end profiles of the first nozzle 11 and/or the second nozzle 12, the third grooves 143 are used for positioning the tops of the first nozzle 11 and/or the second nozzle 12, and the shapes and structures of the third grooves 143 are substantially the same as those of the second grooves 132, which is not described herein again.

Preferably, in order to further improve the installation stability of the first nozzle 11 and the second nozzle 12, the nozzle inner casing 1 further includes a nozzle support plate 16 disposed on the first nozzle 11 and the second nozzle 12, and the upper end and the lower end of the nozzle support plate 16 are respectively abutted against the first support seat 13 and the second support seat 14. As shown in fig. 9 and 11, a through hole 161 is formed in the nozzle support plate 16, fixing posts 108 protruding outward and used for connecting the nozzle support plate 16 are disposed on both the first nozzle body 111 and the second nozzle body 121, and the through hole 161 and the fixing posts 108 are fixed by a threaded fastener. In the present embodiment, the through holes 161 are provided at intervals along the length direction of the nozzle support plate 16, and it is preferable that the through holes 161 at the upper and lower ends of the nozzle support plate 16 are circular holes and the middle section is a kidney-shaped hole, thereby facilitating assembly.

In the present embodiment, two nozzle support plates 16 are symmetrically disposed on both sides of the first nozzle 11 and the second nozzle 12. The connection parts of the first support seat 13 and the second support seat 14 and the nozzle support plate 16 are respectively provided with a limiting part 144, a limiting cavity 145 for accommodating the end part of the nozzle support plate 16 is formed in the limiting part 144, and the end part of the nozzle support plate 16 is inserted into the limiting cavity 145 to realize limiting. By providing the nozzle support plate 16, which can support the first nozzle 11 and the second nozzle, the stability of the first nozzle 11 and the second nozzle 12 on the first support base 13 and the second support base 14 is improved.

As shown in fig. 4, 5 and 12, the nozzle housing 2 includes a first housing half 21 and a second housing half 22 which are coupled to each other, and the first housing half 21 and the second housing half 22 are fixedly connected by means of glue or the like. The first casing half 21 and the second casing half 22 are cooperatively formed with a housing cavity 23 that houses the nozzle inner casing 1. The first air guiding hole 211 is formed in the first casing half 21, and the second air guiding hole 221 is formed in the second casing half 22. The first air guiding hole 211 and the second air guiding hole 221 are both in a strip-shaped through hole structure, and the first air guiding hole 211 and the second air guiding hole 221 are correspondingly arranged at two ends of the air guiding channel 106. In order to facilitate the operation and to satisfy the conventional usage habit, in the present embodiment, the first casing half 21 is provided at the front end of the fan, and the second casing half 22 is provided at the rear end of the fan. Correspondingly, the first nozzle 11 is arranged at the front end of the fan, the first air outlet 104a of the first nozzle 11 is matched with the first air guiding hole 211 of the first casing half 21 to form a first air outlet part 101, and forward air outlet of the fan is realized; the second nozzle 12 is disposed at the rear end of the fan, and the second air outlet 105a of the second nozzle 12 and the second air guiding hole 221 of the second casing half 22 cooperate to form the second air outlet portion 102, and the backward air outlet of the fan is realized.

The inner wall of the nozzle housing 2 is provided with a first plugging convex rib 212 and a second plugging convex rib 222, the first plugging convex rib 212 is arranged near the first air guiding hole 211, and the second plugging convex rib 222 is arranged near the second air guiding hole 221. When the nozzle outer housing 2 is covered on the nozzle inner housing 1, the first inserting rib 212 and the second inserting rib 222 are respectively inserted into the first insertion groove 1121 and the second insertion groove 1221, so that the nozzle outer housing 2 and the nozzle inner housing 1 are stably connected. The number of the first inserting convex ribs 212 is two correspondingly and is located on two sides of the first air guide hole 211 respectively, the number of the second inserting convex ribs 222 is two correspondingly and is located on two sides of the second air guide hole 221 respectively, and the first inserting convex ribs 212 and the second inserting convex ribs 222 can support the first air guide hole 211 and the second air guide hole 221 so as to avoid deformation.

In addition, the nozzle housing 2 further includes a housing support plate 24 disposed at the top ends of the first and second housing halves 21 and 22, and a turn-on seat 25 disposed on the nozzle housing support plate 24, the turn-on seat 25 for rotatably coupling with the top case assembly 4. Detain support 25 wholly and be annular structure soon, has seted up a plurality of catching grooves 251 soon along its circumference on detaining support 25's the terminal surface soon, detains groove 251 soon and be the open end along the one end of rotatory installation direction, and the other end is provided with the portion 252 of detaining soon that upwards extends, detains portion 252 soon and extends to detaining groove 251 top soon towards rotatory installation direction for detaining the groove 251 other end soon is the confined side, thereby forms the enclosure space who holds and restrict top shell subassembly 4 and remove.

As shown in fig. 2, 4, 5 and 13, the diffusive wind switching assembly 3 includes two sets of swing assemblies 3a symmetrically disposed at both sides of the nozzle inner casing 1 and a driving assembly 3b driving the swing assemblies 3a to move. The two groups of swing components 3a move synchronously and respectively control the on-off of a first air outlet channel 104 and a second air outlet channel 105 which are positioned at two sides of the nozzle inner shell 1.

The swing assembly 3a includes a pulling plate 31, a pulling rod 32, and an opening and closing plate 33. The pulling plate 31 is arranged on the nozzle inner shell 1 and can move up and down relative to the nozzle inner shell 1, and the pulling plate 31 comprises a pulling plate main body 311 and a pulling plate connecting part 312 positioned at the upper end of the pulling plate main body 311. The pulling plate body 311 is provided with a sliding portion 3111, and the sliding portion 3111 is inclined toward the first air outlet 101 or the second air outlet 102, preferably at an angle of 30 ° to 60 °. The pulling plate connecting portion 312 penetrates the second supporting seat 14 and is accommodated in the upper space of the nozzle housing 2, a first guide hole 3121 is formed in a side wall of the pulling plate connecting portion 312, the first guide hole 3121 has a long bar-shaped structure, and a long side thereof is opened in a horizontal direction. The output end of the driving assembly 3b is disposed in the first guiding hole 3121, and then drives the pulling plate 31 to move up and down. The upper end surface of the pulling plate connecting portion 312 is provided with a first mounting groove 3122 which is recessed downwards, the swinging component 3a further comprises a driving plate 34, one side of the driving plate 34 is fixedly mounted in the first mounting groove 3122 of one group of the swinging components 3a, the other side of the driving plate 34 is fixedly mounted in the first mounting groove 3122 of the other group of the swinging components 3a, and the two symmetrically arranged swinging components 3a are connected through the driving plate 34 and realize synchronous transmission.

In the present embodiment, the pulling plate 31 is provided at a central position of the nozzle inner casing 1. In order to facilitate the up-and-down sliding of the pulling plate 31, the first nozzle 11 and the second nozzle 12 are provided with limiting plates 109 protruding outwards near the joint of the two, and a guide groove for guiding the pulling plate body 311 to move vertically is formed between the limiting plates 109.

As shown in fig. 14, a sliding rod 321 protruding outward is provided at the middle portion of the back surface of the pulling rod 32, and the sliding rod 321 is provided in the sliding portion 3111 and can slide along the sliding portion 3111 by the pulling plate 31. The sliding portion 3111 may have a sliding slot structure or a sliding hole structure, and for convenience of assembly, in this embodiment, the sliding portion 3111 is specifically a long-strip-shaped sliding hole, and the sliding rod 321 is inserted into the sliding portion 3111, so that the pull rod 32 is slidably coupled with the pull plate 31. When the pulling plate 31 is raised or lowered, the sliding rod 321 is pressed by the side wall of the sliding portion 3111 and moves in the direction of the inclination of the sliding portion 3111. In order to prevent the sliding rod 321 from being separated from the sliding portion 3111, a connecting handle 322 is disposed at an end of the sliding rod 321, a length of the connecting handle 322 is greater than a width of the sliding portion 3111, and a width of the connecting handle 322 is smaller than a width of the sliding portion 3111, so that the connecting handle 322 can pass through the sliding portion 3111 after rotating a certain angle, and after rotating a certain angle, the connecting handle can abut against an end surface of the pulling plate body 311 and limit the sliding rod 321 from being separated from the sliding portion 3111.

The shutter plate 33 is slidably fitted to the nozzle inner casing 1. Specifically, the opening and closing plate 33 includes a second guide hole 33a protruding outward, the second guide hole 33a is a long strip-shaped structure, the long side of the second guide hole 33a is arranged along the horizontal direction, and the inner width of the second guide hole 33a is slightly larger than the outer diameter of the guide post. The nozzle inner housing 1 is provided with guide posts (not shown) protruding outward and penetrating into the second guide holes 33a so that the shutter plate 33 can slide along the long sides of the second guide holes 33 a. Preferably, in the present embodiment, the guide pillar is specifically a fixing pillar 108, the fixing pillar 108 protrudes outward from the second guide hole 33a, and the nozzle support plate 16 and the opening and closing plate 33 share one fixing pillar 108, which can simplify the structure on one hand; on the other hand, the opening and closing plate 33 is restricted by the nozzle support plate 16 to prevent the opening and closing plate 33 from being separated from the fixing post 108 outward, and the connection of the opening and closing plate 33 is more stable.

The upper and lower ends of the opening and closing plate 33 are respectively in contact with the second supporting seat 14 and the first supporting seat 13, thereby restricting the movement of the opening and closing plate 33 in the up-down direction and preventing the opening and closing plate 33 from rotating about the fixing post 108. For the convenience of assembly, a certain gap is left between the upper part of the open-close plate 33 and the second supporting seat 14. The shutter plate 33 includes a first shutter plate 331 slidably fitted to the first nozzle 11 and a second shutter plate 332 slidably fitted to the second nozzle 12. The two ends of the pull rod 32 are fixed to the first opening and closing plate 331 and the second opening and closing plate 332, respectively. When the pulling plate 31 moves upward or downward, it can provide a pushing force for driving the pulling rod 32 to move toward the first air outlet portion 101 and the second air outlet portion 102 to the pulling rod 32, and then drive the first opening and closing plate 331 and the second opening and closing plate 332 to move together, and because of being limited by the fixing column 108, the first opening and closing plate 331 and the second opening and closing plate 332 will move along the horizontal direction. Preferably, in the present embodiment, the pull rods 32 are provided in plural numbers and spaced apart from each other along the length direction of the pull plate 31, and the slide portion 3111 is provided in plural numbers. The connection of the opening and closing plate 33 is made more stable by providing a plurality of tie rods 32 to meet the opening and closing plate 33.

The first opening/closing plate 331 cooperates with the mating end surface 112a of the first nozzle 11 to form a first air outlet segment 1041 of the first air outlet duct 104. The first opening and closing plate 331 includes an arc-shaped first air guiding surface 3311 and a second air guiding surface 3312 parallel to the end surface 112a of the mating portion, and when the first opening and closing plate 331 moves toward the first air outlet portion 101, the second air guiding surface 3312 can abut against the end surface 112a of the mating portion, so as to block the second air outlet section 1042. Preferably, the second wind guide surface 3312 and the fitting portion end surface 112a are flat surfaces, so that they can be easily molded and can be easily attached to each other. In other embodiments, the second wind guiding surface 3312 and the end surface 112a of the fitting portion may be other surfaces that are attached to each other, and the invention is not limited thereto.

The second opening and closing plate 332 and the guiding portion 1231 of the air guiding plate 123 cooperate to form the third air outlet section 1051 of the second air outlet channel 105. The second opening and closing plate 332 includes the curved third air guide surface 3321, the curved direction of the third air guide surface 3321 is the same as or substantially the same as the inclined direction of the guide portion 1231, and the third air outlet section 1051 can increase the air outlet angle of the fourth air outlet section 1052. When the second shutter plate 332 moves toward the second air outlet portion 102, the third air guide surface 3321 can contact the guide portion 1231, thereby blocking the fourth air outlet section 1052.

The driving assembly 3b is disposed on the second supporting seat 14, and the driving assembly 3b includes a first driving member 35 and a rotary table 36 mounted on a first output shaft 351 of the first driving member 35. The first drive member 35 is embodied as a motor. The driving lever 361 is disposed at a position of the end surface of the rotary plate 36 near the outer side, and the driving lever 361 is inserted into the first guiding hole 3121 of the pulling plate 31. When the rotary disc 36 rotates, the shift lever 361 can rotate with the rotary disc 36, thereby driving the pulling plate 31 to move up and down.

The working principle of the diffused air switching assembly of the nozzle assembly is as follows: when the fan is started, airflow is blown out from the first air outlet duct 104 or the second air outlet duct 105, when the airflow direction needs to be switched, the first driving piece 35 is opened, the first driving piece 35 rotates and drives the rotary disc 36 to synchronously rotate, the driving lever 361 on the rotary disc 36 rotates and drives the pull plate 31 to move upwards or downwards, the pull plate 31 moves up and down and is converted into the pull rod 32 to move towards the first air outlet 104a or the second air outlet 105a, and when the pull rod moves towards the first air outlet 104a, the first opening and closing plate 331 can close the first air outlet duct 104, so that the airflow is blown out from the second air outlet duct 105; when the draw bar 32 moves toward the second outlet 105a, the second shutter plate 332 can close the second outlet duct 105, so that wind is blown out from the first outlet duct 104.

As shown in fig. 12, 15 and 16, the top case assembly 4 is disposed on the top of the nozzle housing 2 and closes the top of the nozzle housing 2. The top case assembly 4 includes a top case cover 41, and the top case cover 41 includes a top case cover plate 411 and a cover portion 412 extending downward along the periphery of the top case cover plate 411. The lower extreme of top shell apron 411 terminal surface downward protrusion is provided with at least one second mounting groove 4111, and the embedded magnetic member 45 that is equipped with of second mounting groove 4111, magnetic member 45 specifically are magnet. The remote controller of the bladeless fan is provided with a material which can be adsorbed by the magnetic piece 45, and when the remote controller (not shown) is placed on the top shell cover plate 411, the magnetic piece 45 can adsorb the remote controller, so that the remote controller is prevented from falling off the top shell cover plate 411. Preferably, in this embodiment, the number of the second mounting grooves 4111 is two and the two second mounting grooves are oppositely disposed on two sides of the top housing cover 411, so as to further improve the stability of the remote controller.

The cap portion 412 extends into the nozzle housing 2 and is rotatably coupled to the spin stand 25. The cover 412 has several matching grooves 4121 along its circumference, and the matching grooves 4121 and the screwing grooves 251 are arranged in a one-to-one correspondence. One end of the mating groove 4121 in the rotational mounting direction is provided with a turning-buckle latch 4122, and the other end is an opening end, and the turning-buckle latch 4122 extends to the upper side of the mating groove 4121 towards the opening end. When the fastening clip 4122 is inserted from the open end of the fastening groove 251 and rotated to the closed end of the fastening groove 251, the fastening clip 4122 and the fastening portion 252 are fastened to each other, so that the top case assembly 4 and the fastening bracket 25 are fastened to each other. Top shell subassembly 4 adopts the mode that the spinner connects to join in marriage with nozzle shell 2 to join in marriage, need not additionally to add other connecting pieces and outside appurtenance and assembles, and the dismouting is convenient, has improved the installation effectiveness greatly.

The top case assembly 4 further includes a key sheet 42 for controlling a fan switch and keys 43 for pressing the key sheet 42. The keypad board 42 is embodied as a PCBA board. The top cover 411 has a lower end surface provided with a fixing key 43 and a mounting portion 44 of the key sheet 42. The key 43 is located above the key sheet 42, and the key 43 includes a pressing portion 431 and a supporting portion 432 contacting the pressing portion 431. The top housing cover 411 has a mounting through hole 4112, and the pressing portion 431 is disposed in the mounting through hole 4112. The mounting portion 44 includes a first coupling post 441, and the supporting portion 432 is coupled to the first coupling post 441 to support and fix the pressing portion 431. The key sheet 42 is housed in the cover portion 412, the mounting portion 44 further includes a mounting base 443, and the key sheet 42 is fixed to the mounting base 443 by being positioned. Preferably, for ease of manufacturing, in this embodiment, the mounting portion 44 is integrally formed with the top housing cover 41.

As shown in fig. 17 and 18, the deflector assembly 6 includes a deflector housing 61 and a deflector shroud 62 disposed within the deflector housing 61. A guide passage 63 is formed between the outer wall of the guide cover 62 and the inner wall of the deflector housing 61, and the guide passage 63 is communicated with the air supply passage 1331. The wind wheel assembly 200 comprises a wind wheel outer shell 201 and a wind wheel inner shell 202, an air inlet channel 203 is formed between the wind wheel outer shell 201 and the wind wheel inner shell 202, the wind wheel assembly 200 partially extends into the flow guide channel 63 to enable the air inlet channel 203 to be communicated with the flow guide channel 63, and wind blown out from the air inlet channel 203 enters the air supply channel 1331 after being guided by the flow guide channel 63.

The deflector housing 61 is open-topped and open-bottomed in configuration. The top of the deflector shell 61 is matched and connected with the bottom of the first supporting seat 13. Specifically, as shown in fig. 7, a first seam allowance 611 is formed at the top of the deflector housing 61 along the side edge thereof, a second seam allowance 612 is correspondingly formed at the bottom of the first support base 13, and the first seam allowance 611 and the second seam allowance 612 are fastened to each other. In other embodiments, a threaded fastener may be provided to connect the two, and the invention is not limited herein.

In addition, the deflector housing 61 is further provided with a first receiving portion 613 corresponding to the first nozzle 11 and the second nozzle 12, and two ends of the first receiving portion 613 are respectively connected with the inner wall of the deflector housing 61. A fourth groove 6131 is formed on the first bearing portion 613, and the fourth groove 6131 is an arc groove having the same profile as the bottom of the first nozzle 11 and the second nozzle 12. When the deflector housing 61 is fastened below the first support base 13, the fourth groove 6131 can be matched with the second groove 132, so as to stably connect the bottom of the first nozzle 11 and the bottom of the second nozzle 12.

Preferably, in order to improve the supporting strength of the first receiving portion 613, a supporting rib 614 is further disposed on the deflector housing 61, and two ends of the supporting rib 614 are respectively connected to the first receiving portion 613 and the inner wall of the deflector housing 61. In the embodiment, the supporting ribs 614 are located in the middle of the first receiving portion 613, and two supporting ribs 614 are oppositely disposed on two sides of the first receiving portion 613.

The bottom side wall of the deflector housing 61 is provided with a second bolster 615. The bottom of the deflector shell 61 extends downwards along the circumferential direction thereof to form a convex ring 617, the convex ring 617 is provided with a first sealing ring 64, and the first sealing ring 64 is abutted against the wind wheel shell 201 of the wind wheel assembly 200, so that a gap between the wind wheel assembly 200 and the deflector shell 61 is sealed.

The first seal ring 64 includes an annular first fitting portion 641 and a first seal portion 642 formed on an inner ring of the first fitting portion 641. The upper end face of the first fitting portion 641 is provided with a first caulking groove 6411 from top to bottom, the first caulking groove 6411 is formed along the circumferential direction of the first fitting portion 641, the width of the first caulking groove 6411 is equal to or slightly smaller than the thickness of the convex ring 617, and the first sealing ring 64 is embedded in the convex ring 617 through the first caulking groove 6411. The first sealing portion 642 has a certain elasticity and is bent inward, when the wind wheel assembly 200 is inserted into the diversion channel 63, the wind wheel housing 201 of the wind wheel assembly 200 abuts against the first sealing portion 642, the first sealing portion 642 is bent outward to avoid the position, and under the action of the elasticity, the first sealing portion 642 abuts against the housing of the wind wheel assembly 200.

Preferably, in order to improve the tight fit between the first sealing ring 64 and the convex ring 617, the deflector housing 61 is further provided with a sealing ring pressing ring 65, and the sealing ring pressing ring 65 is clamped on the deflector housing 61 and abuts against the side surface and the lower end surface of the first sealing ring 64. As shown in fig. 19, a buckle 651 is disposed on a side wall of the sealing ring pressing ring 65, a bayonet 6151 is correspondingly disposed on the second socket 615 of the deflector housing 61, and the buckle 651 penetrates through the bayonet 6151 and is abutted against the second socket 615. In this embodiment, a plurality of the buckles 651 are uniformly distributed along the circumferential direction of the sealing ring pressing ring 65, and a plurality of the bayonets 6151 are provided and correspond to the buckles 651 one by one. When the sealing ring pressing ring 65 is installed, the sealing ring pressing ring is installed into the bayonet 6151 of the fluid director shell 61 from bottom to top.

The deflector 62 is accommodated in the deflector housing 61 and connected to the first receiving portion 613. The side wall of the air guide sleeve 62 is provided with at least one second connecting column 621, and the second connecting column 621 extends upwards along the vertical direction. The first receiving portion 613 is correspondingly provided with a third connecting post (not shown) extending downward, and the second connecting post 621 is abutted against the third connecting post. Threaded holes are formed in the second connecting column 621 and the third connecting column, and a threaded fastener (not shown) is arranged between the second connecting column 621 and the third connecting column, so that the deflector 62 and the deflector housing 61 are connected. In this embodiment, the number of the second connecting posts 621 is two and the second connecting posts are oppositely disposed on two sides of the air guide sleeve 62, and the number of the third connecting posts is two.

The bottom of the air guide sleeve 62 is positioned on the wind wheel inner shell 202 of the wind wheel assembly 200, and a second sealing ring 66 is arranged between the air guide sleeve 62 and the wind wheel inner shell 202. Specifically, the bottom of the air guide sleeve 62 is provided with a flange 622 in an outward protruding manner, the second sealing ring 66 comprises an annular second sleeving part 661 and a second sealing part 662 formed on the second sleeving part 661, a second caulking groove 6611 is formed in the inner wall of the second sleeving part 661 from inside to outside, the second caulking groove 6611 is formed circumferentially along the second sleeving part 661, the width of the second caulking groove 6611 is equal to or slightly smaller than the thickness of the flange 622, and the second sealing ring 66 is sleeved outside the flange 622 through the second caulking groove 6611.

The second sealing portion 662 protrudes downward and is bent outward with respect to the second hitching portion 661, and the second sealing portion 662 has certain elasticity. When nacelle 62 is attached to rotor inner shell 202, second seal 662 abuts rotor inner shell 202, thereby sealing the gap between nacelle 62 and rotor inner shell 202. Preferably, as shown in fig. 20, the second sealing ring 66 further includes at least one shock absorbing ring 663 formed on a lower end surface of the second hitching part 661, and the shock absorbing ring 663 contacts the wind turbine inner shell 202 and absorbs shock to the wind turbine assembly 200. Preferably, in the present embodiment, the number of the shock absorbing rings 663 is two. By providing the first and second seal rings 64 and 66, it is possible to effectively seal the gap between the guide passage 63 and the air inlet passage 203, preventing the leakage of the wind.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.