Portable fan with optimized air duct

Abstract

The utility model discloses a portable fan with an optimized air duct, which comprises a main shell with an air outlet area and an air inlet area, an air duct component and a fan, the air duct component and the fan are arranged in the main shell, and the air duct component comprises a volute communicated with the air outlet area and the air inlet area. The air outlet section and the air guide ribs extend between the air outlet side of the volute and the air outlet area, the fan is arranged in the volute, the air guide ribs are arranged at intervals along the air outlet area, the length of the air guide ribs is gradually reduced along the air outlet area, and the effective air supply area is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to portable fan technical field, concretely relates to portable fan of air duct optimization. BACKGROUND

[0002] As a kind of personal cooling equipment, portable fan is popular in recent years due to its lightweight and wearable characteristics. Traditional portable fan usually includes a housing, a volute air duct, a fan assembly and a power supply module.

[0003] The portable fan in the prior art usually includes a housing, an air duct wall integrated in the housing, and a power supply module in the housing. A fan is arranged at the center of the air duct wall, and air flow is sucked from the air inlet through rotating blades, gathered by the guide wall of the air duct wall, and then output from the air outlet in a directional manner. Although this design can basically guide the air flow, the air outlet is usually a single-directional straight slot or a simple grid structure, resulting in concentrated air outlet direction and limited coverage. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a portable fan with optimized air duct.

[0005] The above technical purpose of the utility model is achieved by the following technical solution: a portable fan with optimized air duct, comprising:

[0006] A main housing having an air outlet area and an air inlet area, an air duct assembly and a fan arranged in the main housing, the air duct assembly comprising a volute connecting the air outlet area and the air inlet area, an air outlet section and a wind guide rib extending between the air outlet side of the volute and the air outlet area, the fan being arranged in the volute, the wind guide rib being arranged in the air outlet area, and the length of the wind guide rib being gradually reduced along the air outlet area.

[0007] Further, the air outlet section has a first wind guide surface expanding towards the air outlet area.

[0008] Further, the first wind guide surface is arranged in the height direction of the air outlet area, the wind guide rib is arranged in the width direction of the air outlet area, and the air outlet area extends on the side wall of the main housing.

[0009] Further, the wind guide ribs are arranged in parallel at the edge of the air outlet area, and the first wind guide surface is arranged between adjacent wind guide ribs, or the first wind guide surface extends in the air outlet area in the width direction.

[0010] Further, the air outlet area is provided with an air outlet grid arranged in the height direction, the wind guide rib is connected to the air outlet grid and arranged perpendicularly to the air outlet grid.

[0011] Further, the fan is biased in the volute, the volute comprises a first air duct wall and a second air duct wall extending on two side boundaries of the air outlet area, the first air duct wall extends from an end of the volute away from the fan to one boundary of the air outlet area, and the second air duct wall expands from an end of the volute close to the fan to the other boundary of the air outlet area.

[0012] Further, the air guide rib is tapered towards the second air duct wall.

[0013] Further, the air guide rib has a windward surface forming a second air guide surface, and the second air guide surface is perpendicular to the expansion section of the volute.

[0014] Further, the windward surface of the air guide rib has a guide slope away from the diffusion section of the volute, and the guide slope is coplanar or radially away from the diffusion section of the volute.

[0015] Further, the air inlet area is vertically arranged with the air outlet area, the air inlet area is arranged on the end side wall of the main shell, and the air outlet area is arranged on the circumferential side wall of the main shell.

[0016] Further, the air inlet area is provided with outwardly protruding air inlet ribs, the air inlet ribs are spaced apart to form air inlet grooves, and the air inlet ribs are further connected with air inlet frames, the air inlet frames are suspended on the side wall of the main shell where the air inlet area is located, and the air inlet frames and the side wall of the main shell define the air inlet area.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] The expansion type first air guide surface is arranged in the height direction of the air outlet area, the second air guide surface expanding along the air outlet area is formed by the tapered air guide ribs on both sides, and the multi-dimensional expansion air flow distribution channel is formed by the cooperation of the diffusion section of the volute and the volute tongue, so that the air flow is further diffused horizontally and vertically on the basis of the volute guidance, the coverage area of the air outlet air flow tends to be a three-dimensional fan-shaped distribution, the effective air supply area is improved, and the user can obtain a larger range of cooling experience without frequently adjusting the fan angle.

[0019] The tapered air guide ribs on both sides and the first air guide surface in the up-down direction cooperate to inhibit air flow vortex to a certain extent, reduce the discomfort of local high-speed air flow directly blowing on the human body, optimize the uniformity of air flow distribution, effectively reduce the air flow noise, and improve the body comfort;

[0020] The multi-dimensional expansion flow design is realized by the air guide rib and the first air guide surface, so that when the fan is tilted and worn (such as being clamped in the collar or the backpack shoulder strap), the air flow projection direction can still be maintained by the up-down direction guide surface, the problem of sudden reduction of effective air supply area caused by angle deviation of the traditional structure is avoided, and the environmental adaptability of the equipment is enhanced.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the whole structure schematic view of the utility model;

[0022] Figure 2 It is the schematic view of the air outlet direction of the utility model;

[0023] Figure 3 It is the schematic view of the air duct assembly of the utility model;

[0024] Figure 4 It is the mechanism schematic view of the air duct assembly of the utility model;

[0025] Figure 5 It is the exploded view of the utility model;

[0026] Figure 6 It is the sectional view of the utility model;

[0027] Figure 7 It is one embodiment of the air guide rib of the utility model;

[0028] Figure 8 It is another embodiment of the air guide rib of the utility model;

[0029] In the drawing:

[0030] 1, main shell; 1.1, main body; 1.2, peripheral side wall; 1.3, air inlet side wall; 1.4, air outlet side wall;

[0031] 2, air outlet area; 3, air inlet area; 3.1, air inlet rib; 3.2, air inlet groove; 3.3, air inlet frame;

[0032] 4, volute; 4.1, first air duct wall; 4.2, second air duct wall;

[0033] 5, fan;

[0034] 6, air outlet section; 6.1, first air guide surface;

[0035] 7, air guide rib; 7.1, windward surface; 7.2, second air guide surface; 7.3, guide inclined surface;

[0036] 8, air inlet grille;

[0037] 9, electric control area; 10, fan area; 11, upper end cover; 11.1, clamping plate; 12, lower end cover; DETAILED DESCRIPTION

[0038] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0039] It should be understood that although the terms upper, middle, lower, top end, one end, etc. appear herein to describe various elements, these elements are not limited by these terms. These terms are merely used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential limitation.

[0040] As shown in Figures 1-6 A portable fan with optimized air duct, comprising a main housing 1 with an air outlet area 2 and an air inlet area 3, an air duct assembly and a fan 5 arranged in the main housing 1, the air duct assembly comprising a volute 4 communicating the air outlet area 2 and the air inlet area 3, and an air outlet section 6 and a guide fin 7 extending between the air outlet side of the volute 4 and the air outlet area 2, the fan 5 being arranged in the volute 4, the air outlet section 6 having a first air guide surface 6.1 expanding towards the air outlet area 2, the guide fin 7 being arranged in the air outlet area 2 in a spaced manner, and the length of the guide fin 7 being arranged in a tapered manner along the width direction of the air outlet area 2, preferably in a decreasing manner.

[0041] As a further embodiment of the main housing 1, the main housing 1 comprises a planar main body 1.1, and a peripheral side wall 1.2 extending in the height direction on both sides of the main body 1.1, the main body 1.1 being a plate-shaped member, which can be rectangular in particular, and having a rounded corner at the end, the peripheral side wall 1.2 extending on the edge profile of the main body 1.1, the peripheral side wall 1.2 comprising an upper side wall and a lower side wall in particular, the upper side wall defining an open control area 9 together with the main body 1.1, and the lower side wall defining an open fan area 10 together with the main body 1.1, so that an open mounting space is formed on both sides of the main housing 1, facilitating the assembly operation of the staff on the main housing 1 without causing mutual interference between the control assembly and the fan assembly, and on this basis, the main housing 1 is further provided with an end cover assembly, the end cover assembly comprising an upper end cover 11 and a lower end cover 12 in particular, the upper end cover 11 closing the control area 9, and the lower end cover 12 closing the air inlet area 3, the upper end cover 11 being provided with a clamping plate 11.1, and the lower end cover 12 being provided with an air inlet assembly, the clamping plate 11.1 and the air inlet assembly being located on the surface side of the main housing 1 away from each other, so as to facilitate the formation of the clamping plate 11.1 and the air inlet assembly on the portable fan, and enable the clamping assembly and the air inlet assembly to be pre-assembled to the end cover assembly, effectively improving the assembly efficiency.

[0042] In the present embodiment, the air inlet area 3 is arranged vertically to the air outlet area 2, the air inlet area 3 is arranged on the end side wall of the main housing 1, and the air outlet area 2 is arranged on the circumferential side wall of the main housing 1, the circumferential side wall 1.2 corresponding to the side wall where the air outlet area 2 is located is defined as the air outlet side wall 1.4, and the lower end cover 12 is positioned as the air inlet side wall 1.3 corresponding to the side wall where the air inlet area 3 is located, the air outlet area 2 extends on the side wall of the main housing 1, specifically on the air outlet side wall 1.4.

[0043] As a further explanation of the air outlet section 6, as shown in Figure 2 , the air outlet section 6 refers to the segment of the volute tongue circular arc of the volute 4 that demarcates the air outlet area 2, as shown in Figure 2 , the first air guide surface 6.1 is specifically arranged on the extended surface of the plate-shaped main body 1.1 in the air outlet direction, and the first air guide surface 6.1 is arranged in the height direction of the air outlet area 2, thereby forming diffusion of air flow in the height direction, without the need for additional air guide members on the main housing 1 and the air outlet area 2, without occupying the internal space of the main housing 1, effectively increasing the air flow coverage in the height direction.

[0044] In other embodiments, the first air guide surface 6.1 can also be arranged on both boundaries corresponding to the height direction within the air outlet section 6 and the air outlet area 2, for example, on the lower end cover 12, thereby further optimizing the diffusion of air flow in the vertical dimension.

[0045] As a preference, the first air guide surface 6.1 extends in the width direction of the air outlet area 2, i.e., is connected to the air duct walls on both boundaries of the volute 4, thereby ensuring the diffusion effect of the first air guide surface 6.1.

[0046] As a further implementation of the air guide ribs 7, the air guide ribs 7 specifically extend on both boundaries in the height direction of the air outlet area 2, in the form of substantially vertical ribs, and the air guide ribs 7 are arranged in the width direction of the air outlet area 2, and further extend in the air outlet direction, thereby playing a certain guiding role in the air outlet direction, and the extension amounts of the multiple air guide ribs 7 in the air outlet direction are different, thereby forming a second air guide surface 7.2 on the windward surface of the air guide ribs 7 in the width direction of the air outlet area 2, which further diffuses the air flow in the width direction of the air outlet area 2, cooperates with the first air guide surface 6.1 that expands in the height direction, and sets the air guide surface of multi-dimensional diffusion at the air outlet section 6 of the volute 4, significantly optimizes the air outlet performance of the portable fan, increases the effective air outlet area, and further optimizes the air flow distribution,

[0047] As an example, the extension amounts of the air guide ribs 7 in the air outlet section 6 are 3.5 mm, 2.5 mm, and 1.5 mm, respectively, of course, in different embodiments, the extension amounts of the air guide ribs 7 can be selected according to requirements, and are not limited to the above size examples.

[0048] Further reference Figure 3 As shown, as one arrangement of the air guide ribs 7, the air guide ribs 7 are arranged in parallel along the edge of the air outlet area 2, and the first air guide surface 6.1 is set between adjacent air guide ribs 7.

[0049] Specifically, the windward surface 7.1 of the air guide rib 7 forms a second air guide surface 7.2, such as... Figure 3 As shown by the dashed line, the angle formed by the second air guide surface 7.2 and the gradually expanding section of the volute 4 is close to perpendicular. As an example, the angle range can be selected from 85° to 95°, preferably 90°, so that the airflow is simultaneously expanded and guided by the diffusion section of the volute 4 and the air guide rib 7 in the horizontal width direction, forming a stepped airflow distribution, which effectively reduces noise, and is further expanded in the vertical height direction by the first air guide surface 6.1, thereby effectively improving the coverage angle of the air outlet.

[0050] like Figure 7 As shown, as another arrangement of the air guide ribs 7, the windward surface of the air guide ribs 7 has a guide slope 7.3 set away from the diffuser section of the volute 4, and the guide slope 7.3 is set coplanarly. By making improvements, the diffusion angle of the airflow at the volute tongue of the volute 4 is further increased, and the air outlet area is increased.

[0051] like Figure 8 As shown, as another arrangement of the air guide ribs 7, the windward side of the air guide ribs 7 has a guide slope 7.3 set away from the diffuser section of the volute 4. The guide slope 7.3 is arranged radially away from the diffuser section of the volute 4. The purpose of this arrangement is to further expand the air outlet area.

[0052] like Figure 4 As shown, to further explain the gradually tapering arrangement of the air guide ribs 7 in the air outlet area 2, the fan 5 is offset within the volute 4. The volute 4 includes a first air duct wall 4.1 and a second air duct wall 4.2 extending along the two side boundaries of the air outlet area 2. The first air duct wall 4.1 extends from the end of the volute 4 away from the fan 5 to one boundary of the air outlet area 2, and the second air duct wall 4.2 extends from the end of the volute 4 near the fan 5 to the other boundary of the air outlet area 2. The first air duct wall 4.1 refers to the extension of the diffuser section of the volute 4 within the air outlet section 6, and the second air duct wall 4.2 refers to the extension of the volute tongue section of the volute 4 within the air outlet section 6. That is, the first air duct wall 4.1 and the second air duct wall 4.2 together define the width direction of the air outlet area 2. The air guide ribs 7 are tapered toward the second air duct wall 4.2, and the tapering trend of the air guide ribs 7 can be selected as a proportional tapering or a decreasing arrangement toward the second air duct wall 4.2.

[0053] Specifically, the air outlet area 2 is provided with air outlet grilles arranged at intervals in the height direction, and the air guide ribs 7 are connected to the air outlet grilles and arranged perpendicularly to the air outlet grilles, so that the air guide ribs 7 are integrally formed with the air outlet grilles, thereby improving the forming efficiency.

[0054] Further referring to Figure 6 The air inlet area 3 is provided with air inlet ribs 3.1 protruding outward, a plurality of the air inlet ribs 3.1 are arranged at intervals to form air inlet grooves 3.2, and the air inlet ribs 3.1 are further connected to air inlet frames 3.3, the air inlet frames 3.3 are suspended on the side wall of the main shell 1 where the air inlet area 3 is located, and define the air inlet area 3 with the side wall of the main shell 1, wherein the air inlet frames 3.3 are plate-shaped and serve to protect the air inlet grooves 3.2 above, thereby effectively reducing the entry of external dust.

[0055] In the embodiment, the perpendicular connection of the air guide ribs 7 to the air outlet grilles and the integrated structure of the air inlet ribs 3.1 and the suspended air inlet frames 3.3 form a self-supporting grid structure of the air inlet area 3 and the air outlet area 2, thereby improving the deformation resistance of the shell without adding additional reinforcing ribs, especially for the air outlet area 2, and the air guide ribs 7 further extend in the air outlet section 6, thereby further improving the structural strength of the air outlet area 2.

[0056] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and those skilled in the art can make modifications without creative contribution according to the needs after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A portable fan with air duct optimization, characterized by, The application relates to a main shell (1) with an air outlet area (2) and an air inlet area (3), an air duct assembly arranged in the main shell (1) and a fan (5), wherein the air duct assembly comprises a volute (4) connecting the air outlet area (2) and the air inlet area (3), an air outlet section (6) and a guide fin (7) extending between the air outlet side of the volute (4) and the air outlet area (2), and the fan (5) is arranged in the volute (4), the guide fin (7) is arranged in the air outlet area (2) in a spaced manner, and the length of the guide fin (7) is arranged in a tapered manner along the air outlet area (2). The air outlet section (6) is further provided with a first guide surface (6.1) expanding towards the air outlet area (2).

2. A portable fan with air duct optimization as claimed in claim 1 characterized in that: The first guide surface (6.1) is arranged in the height direction of the air outlet area (2), the guide fin (7) is arranged in the width direction of the air outlet area (2) in a spaced manner, and the air outlet area (2) extends on the side wall of the main shell (1).

3. A portable fan with air duct optimization as claimed in claim 2, wherein: The guide fins (7) are arranged in parallel on the edge of the air outlet area (2), and the first guide surface (6.1) is arranged between the adjacent guide fins (7), or the first guide surface (6.1) extends in the width direction in the air outlet area.

4. A portable fan with air duct optimization as claimed in claim 2, wherein: The air outlet area (2) is provided with air outlet grilles arranged in the height direction in a spaced manner, the guide fin (7) is connected to the air outlet grille and arranged perpendicularly to the air outlet grille.

5. A portable fan with air duct optimization as claimed in claim 1, wherein: The fan (5) is arranged in the volute (4) in a biased manner, the volute (4) comprises a first air duct wall (4.1) and a second air duct wall (4.2) extending on the two side boundaries of the air outlet area (2), the first air duct wall (4.1) extends from the end of the volute (4) away from the fan (5) to one boundary of the air outlet area (2), the second air duct wall (4.2) expands from the end of the volute (4) close to the fan (5) to the other boundary of the air outlet area (2), and the guide fin (7) is arranged in a tapered manner towards the second air duct wall (4.2).

6. A portable fan with air duct optimization as claimed in claim 1, wherein: The windward surface (7.1) of the guide fin (7) forms a second guide surface (7.2), and the included angle between the second guide surface (7.2) and the gradually expanding section of the volute (4) is close to perpendicular.

7. A portable fan with air duct optimization as claimed in claim 1, wherein: The windward surface of the guide fin (7) has a guide inclined surface (7.3) arranged away from the diffusion section of the volute (4), and the guide inclined surface (7.3) is arranged in a coplanar manner, or the guide inclined surface (7.3) is arranged in a radial manner away from the diffusion section of the volute (4).

8. A portable fan with air duct optimization as claimed in claim 1, wherein: The air inlet area (3) is arranged perpendicularly to the air outlet area (2), the air inlet area (3) is arranged on the end side wall of the main shell (1), and the air outlet area (2) is arranged on the circumferential side wall of the main shell (1).

9. A portable fan with air duct optimization as claimed in claim 1, wherein: The air inlet area (3) is provided with air inlet fins (3.1) protruding outward, a plurality of air inlet fins (3.1) are arranged in a spaced manner to form air inlet grooves (3.2), and the air inlet fins (3.1) are further connected with air inlet frames (3.3), the air inlet frames (3.3) are suspended on the side wall of the main shell (1) where the air inlet area (3) is arranged, and the air inlet frames (3.3) and the side wall of the main shell (1) define the air inlet area (3).

10. A portable fan with air duct optimization as claimed in claim 1, wherein: ​

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