CN215058325U - Fan with cooling device - Google Patents

Abstract

An embodiment of the utility model provides a fan, fan includes casing and fan assembly. The shell comprises an annular first side wall structure, an annular second side wall structure sleeved on the periphery of the first side wall structure, a connecting part connected between the first side wall structure and the second side wall structure, and an extending part arranged opposite to the connecting part, wherein the first side wall structure, the second side wall structure, the connecting part and the extending part are further used for enclosing a fan accommodating cavity, an annular air duct communicated with the fan accommodating cavity, an air inlet and an air outlet communicated with the annular air duct, the air inlet comprises a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively communicated with two opposite ends of the annular air duct; the fan assembly is located in the fan accommodating cavity and used for blowing the air of the air inlet out of the air outlet through the annular air duct.

Description

Fan with cooling device

Technical Field

The utility model relates to a fan technical field, especially a fan.

Background

Under hot weather or environment, in order to alleviate high temperature, sultry, the discomfort that the air does not circulate and bring, people can use electrical apparatus such as fan usually to drive the air flow to promote human comfort level, common fan on the market, vertical or sitting posture usually, under some special environment, like in the less environment of personal space such as office, vertical or sitting posture fan occupation space is great usually, is unsuitable for the use, and user experience is poor.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a fan with better user experience.

An embodiment of the utility model provides a fan, fan includes casing and fan assembly. The shell comprises an annular first side wall structure, an annular second side wall structure sleeved on the periphery of the first side wall structure, a connecting part connected between the first side wall structure and the second side wall structure, and an extending part arranged opposite to the connecting part, wherein the first side wall structure, the second side wall structure, the connecting part and the extending part are further used for enclosing a fan accommodating cavity, an annular air duct communicated with the fan accommodating cavity, an air inlet and an air outlet communicated with the annular air duct, the air outlet is an annular air outlet or comprises a plurality of sub air outlets annularly arranged corresponding to the annular air duct, the air inlet comprises a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively communicated with two opposite ends of the annular air duct; the fan assembly is located in the fan receiving cavity and used for blowing the air of the air inlet out of the air outlet through the annular air duct.

Compared with the prior art, the fan provided by the embodiment of the utility model has the advantages that the first side wall structure, the second side wall structure, the connecting part and the extending part form the fan containing cavity, the annular air duct communicated with the fan containing cavity, the air inlet and the air outlet communicated with the annular air duct, so that the fan component blows out air from the air outlet through the annular air duct from the air inlet in the shell, the fan component is wrapped in the shell, the fan is safer in use, the noise is lower, the whole fan structure is simpler, the occupied space is smaller, meanwhile, the air is blown out from the air outlet through the annular air duct, the air outlet of the fan is closer to natural air, the user feels more comfortable when using the fan, the user experience is better, in addition, the air inlet comprises the first air inlet and the second air inlet, the first air inlet and the second air inlet are communicated with two opposite ends of the annular air duct respectively, so that air inlet efficiency is higher, air inlet is more uniform, and air outlet efficiency of the fan is improved.

In one embodiment of the present invention, the first air inlet and the second air inlet are disposed on the second sidewall structure, the casing further includes an air inlet baffle, the air inlet baffle is connected to the second sidewall structure and respectively covers the first air inlet and the second air inlet, and an air inlet gap is further formed between the air inlet baffle and the second sidewall structure, so that the first air inlet and the second air inlet realize air inlet of the fan through the air inlet gap. Locate through setting up respectively the cover first air intake with on the second air intake the air inlet baffle, just the air inlet baffle with still form the air inlet clearance between the second lateral wall structure, make first air intake with the second air intake all passes through the air inlet clearance is realized the air inlet of fan can play and carry out furthest's effect to the air inlet, and can make the neighbouring first air intake with the atmospheric pressure of second air intake part is greater than first air intake with thereby the inside atmospheric pressure of second air intake forms the negative pressure, makes the air inlet speed faster, improves the air inlet efficiency of fan, simultaneously, the air inlet baffle can also avoid tiny article such as dust, impurity, hair to follow first air intake with the second air intake gets into in the fan, ensured the safety of fan during operation.

In one embodiment, the extension portion is connected to an end of the second side wall structure away from the connecting portion, the end of the extension portion away from the second side wall structure and the end of the first side wall structure away from the connecting portion respectively enclose two air outlets, and the air outlets are slit air outlets for discharging air towards the side where the connecting portion is located; the first side wall structure further encloses a hollow air outlet channel, and air outlet of the air outlet is accelerated and converged in the air outlet channel and then blown out from one side of the connecting portion. Through setting up the air outlet is the orientation the slit formula air outlet of connecting portion place one side air-out can play the effect that carries out furthest's compression to the air-out, and can make annular wind channel is neighbouring the atmospheric pressure of air outlet part is greater than the outside atmospheric pressure of air outlet to form the negative pressure will air-out in the annular wind channel is pressed to the air outlet, makes the air-out speed faster, improves the air-out efficiency of fan, simultaneously, first lateral wall structure still encloses into hollow air-out passageway, makes the air-out of air outlet is in air-out passageway forms the annular and assembles the back, follows with higher speed one side at connecting portion place blows out, makes the air-out faster, accurate, concentrated, thereby reaches rapid cooling's purpose, improves the air-out efficiency of fan.

In one embodiment, the first side wall structure comprises a first arc-shaped side wall protruding towards the inner side, the second side wall structure comprises a second arc-shaped side wall protruding towards the side far away from the first side wall structure, and the distance between the first arc-shaped side wall and the second arc-shaped side wall gradually increases and then decreases along the direction from the connecting part to the extending part; the outer surface of the first arc-shaped side wall, which is far away from the second side wall structure, is an arc-shaped surface protruding towards the inner side and used for guiding the wind of the air outlet towards one side where the connecting part is located. By arranging the first side wall structure to comprise the first arc-shaped side wall protruding towards the inner side, the second side wall structure to comprise the second arc-shaped side wall protruding towards one side far away from the first side wall structure, and the distance between the first arc-shaped side wall and the second arc-shaped side wall gradually increases and then decreases along the direction from the connecting part to the extending part, the volume of the annular air duct can be increased, and simultaneously, the effect of compressing and accelerating the outlet air can be achieved, so that the outlet air of the air outlet can be blown out more quickly and can be cooled, in addition, the outer surface of the first arc-shaped side wall far away from the second side wall structure can be used for guiding the outlet air of the air outlet by virtue of the arc-shaped surface protruding towards the inner side, and after the outlet air of the air outlet is compressed and discharged, the arc-shaped surface can be punched down along the original direction under the action of inertia, the air near the arc-shaped surface is driven to rush down together, a boosting effect like a waterfall is formed, and the air outlet efficiency of the fan is improved.

In one embodiment, the fan assembly includes a first fan assembly and a second fan assembly, the fan receiving cavity includes a first fan receiving cavity and a second fan receiving cavity located at two ends of the annular air duct and respectively communicated with the annular air duct, the first air inlet is communicated with the first fan receiving cavity, the first fan assembly is located in the first fan receiving cavity and corresponds to the first air inlet, the second air inlet is communicated with the second fan receiving cavity, and the second fan assembly is located in the second fan receiving cavity and corresponds to the second air inlet. Through setting up first fan unit, second fan unit respectively with first air intake, the second air intake is corresponding can make the independent business turn over wind in both ends of fan reduces the noise when the fan uses, improves simultaneously the air-out efficiency of fan.

In one embodiment, the casing further includes a partition plate, the partition plate divides the annular air duct into four sub-air ducts, two of the sub-air ducts are communicated with the first fan receiving cavity, the other two sub-air ducts are communicated with the second fan receiving cavity, the first fan assembly includes a first fan member and a second fan member, the second fan assembly includes a third fan member and a fourth fan member, the first air inlet includes a first sub-air inlet corresponding to the first fan member and a second sub-air inlet corresponding to the second fan member, the second air inlet includes a third sub-air inlet corresponding to the third fan member and a fourth sub-air inlet corresponding to the fourth fan member, the first fan member is configured to provide the inlet air from the first sub-air inlet to a corresponding portion of the air outlet through a corresponding one of the sub-air ducts, the second fan piece is used for providing the air inlet of the second sub air inlet to the corresponding part of the air outlet through the corresponding sub air channel, the third fan piece is used for providing the air inlet of the third sub air inlet to the corresponding part of the air outlet through the corresponding sub air channel, and the fourth fan piece is used for providing the air inlet of the fourth sub air inlet to the corresponding part of the air outlet through the corresponding sub air channel. The annular air duct is divided into four sub-air ducts by the partition plate, and meanwhile, the first fan assembly is arranged to comprise a first fan piece and a second fan piece, the second fan assembly comprises a third fan piece and a fourth fan piece, the first air inlet comprises a first sub-air inlet corresponding to the first fan piece and a second sub-air inlet corresponding to the second fan piece, the second air inlet comprises a third sub-air inlet corresponding to the third fan piece and a fourth sub-air inlet corresponding to the fourth fan piece, so that the first fan piece can provide the inlet air of the first sub-air inlet to the corresponding part of the air outlet through the corresponding one of the sub-air ducts, the second fan piece provides the inlet air of the second sub-air inlet to the corresponding part of the air outlet through the corresponding one of the sub-air ducts, and the third fan piece provides the inlet air of the third sub-air inlet to the corresponding part of the air duct through the corresponding one of the sub-air duct The air inlet of the fourth sub air inlet is provided to the corresponding part of the air outlet by the fourth fan part through the corresponding sub air channel, and the first fan part, the second fan part, the third fan part and the fourth fan part are respectively provided with the corresponding independent air inlet/outlet and air channel, so that the minimum air noise of the fan under the same air volume can be ensured, and the silencing effect in use is achieved.

In one embodiment, the first sidewall structure includes first and second oppositely disposed annular edges, the first annular edge including first and second oppositely disposed edges and third and fourth oppositely disposed edges connected between the first and second edges; the second side wall structure comprises a third annular edge and a fourth annular edge which are oppositely arranged, the third annular edge corresponds to the first annular edge and comprises a fifth edge and a sixth edge which are oppositely arranged and a seventh edge and an eighth edge which are connected between the fifth edge and the sixth edge and are oppositely arranged, the connecting part comprises a first connecting part and a second connecting part which are oppositely arranged, the first connecting part is connected between the first edge and the fifth edge, the second connecting part is connected between the second edge and the sixth edge, the first connecting part, a part of the second side wall structure connected with the first connecting part are used for enclosing the first fan containing cavity, the second connecting part and a part of the second side wall structure connected with the second connecting part are used for enclosing the second fan containing cavity, the annular air duct is located on the periphery of the first side wall structure, two ends of the annular air duct are respectively communicated with the first fan storage cavity and the second fan storage cavity, and the air outlet is located between the second annular edge and the fourth annular edge. The first fan receiving cavity is enclosed by the first connecting part and part of the second side wall structure connected with the first connecting part, the second fan receiving cavity is enclosed by the second connecting part and part of the second side wall structure connected with the second connecting part, so that the first fan assembly and the second fan assembly are respectively received in the first fan receiving cavity and the second fan receiving cavity, the air outlet quantity of the fan can be increased, the air outlet efficiency of the fan is improved, meanwhile, the annular air duct is arranged at the periphery of the first side wall structure, two ends of the annular air duct are respectively communicated with the first fan receiving cavity and the second fan receiving cavity, the air outlet is positioned between the second annular edge and the fourth annular edge, and the air outlet of the first fan assembly and the air outlet of the second fan assembly can be led into the air outlet through the annular air duct and blown out, the air outlet efficiency of the fan is further improved.

In one embodiment, the first connecting portion includes a first portion and a second portion, the first portion connects the fifth edge, the seventh edge, and the eighth edge, the second portion connects the first edge and extends toward the side where the second sidewall structure is located to connect the first portion, and the second portion protrudes from the first edge along the direction of the central axis of the loop of the first sidewall structure; the second connecting portion includes a third portion and a fourth portion, the third portion connects the sixth edge, a part of the seventh edge and a part of the eighth edge, the third portion connects the second edge and extends toward one side of the second sidewall structure to connect the third portion, and the fourth portion protrudes from the second edge along the direction of the annular central axis of the first sidewall structure, the connecting portion further includes a third connecting portion and a fourth connecting portion disposed opposite to each other, the third connecting portion is connected between the third edge and the seventh edge, the third connecting portion is connected between the first connecting portion and the second connecting portion, the fourth connecting portion is connected between the fourth edge and the eighth edge, and the fourth connecting portion is connected between the first connecting portion and the second connecting portion, the extension portion is connected with the fourth annular edge, the first connecting portion, a portion of the second side wall structure connected with the first connecting portion and the extension portion enclose the first fan containing cavity, the second connecting portion, a portion of the second side wall structure connected with the second connecting portion and the extension portion enclose the second fan containing cavity, and the second portion, the fourth portion, the third connecting portion, the fourth connecting portion, a portion of the extension portion away from the fourth edge and the first side wall structure enclose the annular air duct. The first fan component, the second fan component and the annular air duct of the fan can be all wrapped in the shell by enclosing the first connecting part, part of the second side wall structure connected with the first connecting part and the extending part into the first fan containing cavity, the second connecting part, part of the second side wall structure connected with the second connecting part and the extending part into the second fan containing cavity, and the second part, the fourth part, the third connecting part, the fourth connecting part, the part of the extending part far away from the fourth edge and the first side wall structure into the annular air duct, so that the whole structure of the fan is more compact, the occupied space is smaller, the fan is convenient to carry, and meanwhile, the second part protrudes out of the first edge along the direction of the annular central axis of the first side wall structure, the fourth part protrudes out of the second edge, so that the volumes of the first fan accommodating cavity, the second fan accommodating cavity and the annular air duct can be increased, the air outlet of the fan is increased, and the air outlet efficiency of the fan is improved.

In one embodiment, the first air inlet and the second air inlet are both disposed on the second sidewall structure. The first air inlet and the second air inlet are formed in the second side wall structure, so that wind can be efficiently guided into the fan, and the air outlet efficiency of the fan is improved.

In one embodiment, the second sidewall structure comprises a first sidewall part, a second sidewall part, a third sidewall part and a fourth sidewall part which are sequentially connected in an annular mode, and the first sidewall part and the third sidewall part are oppositely arranged; the first side wall portion and the third side wall portion each have a first end and a second end disposed opposite to each other in a length direction, the first air inlet is disposed at the first end of at least one of the first side wall portion and the third side wall portion, and the second air inlet is disposed at the second end of at least one of the first side wall portion and the third side wall portion. By providing the first air inlet at the first end of at least one of the first and third sidewall portions and providing the second air inlet at the second end of at least one of the first and third sidewall portions, the first and second air inlets may be located at opposite ends of the second sidewall structure, respectively, thereby making the air intake of the fan more uniform and improving the air intake efficiency of the fan.

In one embodiment, the fan further comprises a fixing member connected to the housing for fixing the fan to an external object; the fixing piece comprises a first fixing piece and a second fixing piece, the first fixing piece is connected with the second side wall structure, the second fixing piece is connected with the second side wall structure, and the first fixing piece and the second fixing piece are used for clamping two sides of the external object; at least one of the first and second fixtures is pivotally coupled to the second sidewall structure. Through setting up first mounting with the second mounting can make the fan is fixed on external article such as computer, panel, and the user of being convenient for uses, has enlarged the application range of fan, user experience is better, simultaneously, first mounting with the centre gripping of second mounting the both sides of external object can increase the fan is with the fixed stability of external object, has ensured stability and the security of fan during operation, and, first mounting with at least one in the second mounting rotate connect in on the second lateral wall structure, can be through rotating first mounting with at least one in the second mounting is right the fan is fixed and is taken, and the user of being convenient for uses, and user experience is better.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a fan according to an embodiment of the present invention.

Fig. 2 is a perspective view of the fan shown in fig. 1 from another angle.

Fig. 3 is an exploded perspective view of the fan shown in fig. 1.

Fig. 4 is a sectional view of the fan shown in fig. 1.

Fig. 5 is a cross-sectional view of the fan shown in fig. 1 at another angle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

Referring to fig. 1 to 5, fig. 1 is a perspective view of a fan 1 according to an embodiment of the present invention. Fig. 2 is a perspective view of the fan 1 shown in fig. 1 at another angle. Fig. 3 is an exploded perspective view of the fan 1 shown in fig. 1. Fig. 4 is a sectional view of the fan 1 shown in fig. 1. Fig. 5 is a cross-sectional view of the fan shown in fig. 1 at another angle. The embodiment of the utility model provides a fan 1, fan 1 is bladeless fan, including casing 10 and fan subassembly 30.

Wherein, the housing 10 includes an annular first sidewall structure 11, an annular second sidewall structure 12 sleeved on the periphery of the first sidewall structure 11, a connecting portion 13 connected between the first sidewall structure 11 and the second sidewall structure 12, and an extending portion 19 disposed opposite to the connecting portion 13, the first side wall structure 11, the second side wall structure 12, the connecting portion 13 and the extending portion 19 are further configured to enclose a fan receiving cavity 14, an annular air duct 15 communicated with the fan receiving cavity 14, an air inlet 17 and an air outlet 16 communicated with the annular air duct 15, the air outlet 16 is an annular air outlet or comprises a plurality of sub air outlets which are annularly arranged corresponding to the annular air duct 15, the air inlet 17 comprises a first air inlet 171 and a second air inlet 172, and the first air inlet 171 and the second air inlet 172 are respectively communicated with two opposite ends of the annular air duct 15; the fan assembly 30 is located in the fan receiving chamber 14, and is used for blowing the wind from the wind inlet 17 out of the wind outlet 16 through the annular wind channel 15. It can be understood that, when the fan assembly 30 accommodated in the housing 10 is operated, wind can be blown into the annular air duct 15 from the first wind inlet 171 and the second wind inlet 172 respectively, and then the outlet wind of the fan assembly 30 is blown out from the wind outlet 16 by the guiding of the annular air duct 15, so as to achieve the purposes of promoting air circulation and reducing ambient temperature. In this embodiment, the fan assembly 30 may be a turbine fan, and the turbine fan has the characteristics of large wind power and strong heat dissipation capability, and can output the maximum wind power in the minimum space and improve the heat dissipation effect. The air outlet 16 may be an annular air outlet, so that the air outlet range is wider, in other embodiments, the air outlet 15 may further include a plurality of sub air outlets corresponding to each annular air duct 15, and by providing a plurality of sub air outlets corresponding to each annular air duct 15, impurities such as dust and hair may not easily enter the fan 1 through the air outlet 16, so that the safety of the fan 1 is improved.

The embodiment of the present invention provides a fan 1, which is enclosed into the fan receiving cavity 14, the annular air duct 15 communicated with the fan receiving cavity 14, the air inlet 17 and the air outlet 16 communicated with the annular air duct 16 by the first side wall structure 11, the second side wall structure 12, the connecting portion 13 and the extending portion 19, so that the fan assembly 30 blows out wind from the air inlet 17 via the annular air duct 15 from the air outlet 16 in the casing 10, the fan assembly 30 is enclosed inside the casing 10, so that the fan 1 is safer and less noisy when in use, the whole structure of the fan 1 is simpler, the occupied space is smaller, and simultaneously, the wind is blown out from the air outlet 16 by the annular air duct 15, so that the outlet wind of the fan 1 is closer to natural wind, and the user feels more comfortable when in use, user experience is better, in addition, air intake 17 includes first air intake 171 with second air intake 172, first air intake 171 with second air intake 172 respectively with the both ends intercommunication of the relative setting of annular duct 15 makes the air inlet efficiency higher, and the air inlet is more even, and then promotes the air-out efficiency of fan 1.

Further, the first air inlet 171 and the second air inlet 172 are all disposed on the second side wall structure 12, the housing 10 further includes an air inlet baffle 18, the air inlet baffle 18 is connected to the second side wall structure 12, and is respectively covered on the first air inlet 171 and the second air inlet 172, an air inlet gap is further formed between the air inlet baffle 18 and the second side wall structure 12, so that the first air inlet 171 and the second air inlet 172 are all realized through the air inlet gap for air inlet of the fan 1. It can be understood that when the fan assembly 30 operates, the air is respectively fed through the first air inlet 171 and the second air inlet 172, and the fed air enters the annular air duct 15 from the opposite ends of the annular air duct 15 through the air inlet gap formed between the air inlet baffle 18 and the second side wall structure 12, so that the air inlet gap formed between the air inlet baffle 18 and the second side wall structure 12 can perform the function of compressing the fed air to the maximum extent, and the air pressure near the first air inlet 171 and the second air inlet 172 is greater than the air pressure inside the first air inlet 171 and the second air inlet 172 to form a negative pressure, so as to press the external air into the first air inlet 171 and the second air inlet 172, thereby increasing the air inlet volume and increasing the air inlet speed. The air inlet baffle 18 is respectively arranged on the first air inlet 171 and the second air inlet 172 in a covering manner, and an air inlet gap is further formed between the air inlet baffle 18 and the second side wall structure 12, so that the air inlet of the fan is realized by the first air inlet 171 and the second air inlet 172 through the air inlet gap, the effect of compressing the air inlet to the maximum extent can be achieved, the air pressure adjacent to the first air inlet 171 and the second air inlet 172 is higher than the air pressure inside the first air inlet 171 and the second air inlet 172 to form negative pressure, the air inlet speed is higher, the air inlet efficiency of the fan 1 is improved, meanwhile, the air inlet baffle 18 can also prevent fine articles such as dust, impurities, hair and the like from entering the fan 1 from the first air inlet 171 and the second air inlet 172, the safety of the fan 1 during operation is guaranteed.

Further, the extending portion 19 is connected to an end of the second side wall structure 12 away from the connecting portion 13, an end of the extending portion 19 away from the second side wall structure 12 and an end of the first side wall structure 11 away from the connecting portion 13 respectively enclose two air outlets 16, and the air outlets 16 are slit air outlets that discharge air toward a side where the connecting portion 13 is located; the first side wall structure 11 further encloses a hollow air outlet channel 113, and the outlet air of the air outlet 16 is accelerated and converged in the air outlet channel 113 and then is blown out from the side where the connecting portion 13 is located. It can be understood that, in this embodiment, the end of the extension portion 19 away from the second side wall structure 12 and the end of the first side wall structure 11 away from the connection portion 13 respectively enclose two air outlets 16, the air outlet 16 is a slit-type air outlet that discharges air towards the side of the connection portion 13, and can play a role of compressing the discharged air to the maximum extent, and can make the air pressure of the portion of the annular air duct 15 adjacent to the air outlet 16 greater than the air pressure outside the air outlet 16, so as to form a negative pressure that presses the discharged air in the annular air duct 15 towards the air outlet 16, so that the air-discharging speed is faster, and the air-discharging efficiency of the fan 1 is improved, meanwhile, in combination with the hollow air-discharging passage 113 enclosed by the first side wall structure 11, the discharged air of the air outlet 15 is converged, accelerated and guided in the air-discharging passage 113, so that the discharged air of the air outlet 16 is converged and then discharged from the connection portion 13 after the air-discharging passage 113 is accelerated The fan 1 reaches the maximum air outlet efficiency and is cooled rapidly. Through setting up air outlet 16 is the orientation the slit formula air outlet of connecting portion 13 place one side air-out can play and carry out furthest's compression effect to the air-out, and can make annular wind channel 15 is close to the atmospheric pressure of air outlet 16 part is greater than the atmospheric pressure outside air outlet 16 to form the negative pressure with the air-out pressure in the annular wind channel 15 is to air outlet 16 makes the air-out speed faster, improves fan 1's air-out efficiency, in addition, the hollow air-out passageway 113 that first lateral wall structure 11 encloses, the air-out of air outlet 16 can blow off the back in the air-out passageway 113 is accelerated to be assembled the back and is blown out towards one side that connecting portion 14 was located, makes the air-out more accurate, concentrate, thereby reaches rapid cooling's purpose, improves fan 1's air-out efficiency.

Further, the first side wall structure 11 includes a first arc-shaped side wall 114 protruding toward the inner side, the second side wall structure 12 includes a second arc-shaped side wall 128 protruding toward the side far from the first side wall structure 11, and the distance between the first arc-shaped side wall 114 and the second arc-shaped side wall 128 gradually increases and decreases along the direction from the connecting portion 13 to the extending portion 19; the outer surface of the first arc-shaped sidewall 114 away from the second sidewall structure 12 is an arc-shaped surface protruding towards the inside, and is used for guiding the wind of the wind outlet 16 towards the side of the connecting portion 13. In this embodiment, it can be understood that, the first sidewall structure 11 includes a first arc-shaped sidewall 114 protruding toward the inside, the second sidewall structure 12 includes a second arc-shaped sidewall 128 protruding toward the side away from the first sidewall structure 11, and the distance between the first arc-shaped sidewall 114 and the second arc-shaped sidewall 128 gradually increases and decreases along the direction from the connecting portion 13 to the extending portion 19, so as to maximize the volume of the annular air duct 15, and meanwhile, the outer surface of the first arc-shaped sidewall 114 away from the second sidewall structure 12 is an arc-shaped surface protruding toward the inside, so as to form a certain slope at the air outlet 16, thereby guiding the air out of the air outlet 16 under the action of inertia. By arranging that the first sidewall structure 11 includes a first arc-shaped sidewall 114 protruding toward the inner side, the second sidewall structure 12 includes a second arc-shaped sidewall 128 protruding toward the side away from the first sidewall structure 11, and the distance between the first arc-shaped sidewall 114 and the second arc-shaped sidewall 128 gradually increases and decreases along the direction from the connecting portion 13 to the extending portion 19, the volume of the annular air duct 15 can be increased, and simultaneously, the compressed accelerated blowout effect on the outlet air can be achieved, so that the outlet air of the outlet 16 can be blown out faster, and a certain compression cooling effect can be achieved, in addition, the outer surface of the first arc-shaped sidewall 114 away from the second sidewall structure 12 can achieve the guiding effect on the outlet air of the outlet 16 for the arc-shaped surface protruding toward the inner side, and in combination with the design of the outlet 16 and the hollow outlet air channel 113 with the strip-shaped slits, the air outlet of the air outlet 16 can be converged and accelerated after being compressed and discharged, and the air outlet rushes down the arc-shaped surface along the original direction under the action of inertia, so that the air near the arc-shaped surface is driven to rush down together, a boosting effect like a waterfall is formed, and the air outlet efficiency of the fan 1 is improved.

Further, the fan assembly 30 includes a first fan assembly 31 and a second fan assembly 32, the fan receiving cavity 14 includes a first fan receiving cavity 141 and a second fan receiving cavity 142 located at two ends of the annular air duct 15 and respectively communicated with the annular air duct 15, the first air inlet 171 is communicated with the first fan receiving cavity 141, the first fan assembly 31 is located in the first fan receiving cavity 141 and corresponds to the first air inlet 171, the second air inlet 172 is communicated with the second fan receiving cavity 142, and the second fan assembly 32 is located in the second fan receiving cavity 142 and corresponds to the second air inlet 172. It can be understood that, in this embodiment, the first fan accommodating cavity 141 and the second fan accommodating cavity 142 are located at two ends of the fan 1, the first fan assembly 31 is located in the first fan accommodating cavity 141, and the second fan assembly 32 is located in the second fan accommodating cavity 142, and can blow air to the annular air duct 15 at the same time, so that the air output of the fan 1 is larger, the air output efficiency of the fan 1 is improved, and the purpose of rapid cooling is achieved. Through the arrangement of the first fan assembly 31 and the second fan assembly 32 corresponding to the first air inlet 171 and the second air inlet 172, air can be independently fed and discharged from two ends of the fan, noise generated when the fan 1 is used is reduced, and air outlet efficiency of the fan 1 is improved.

Further, the housing 10 further includes a partition plate 115, the partition plate 115 divides the annular air duct 15 into four sub-air ducts 151, two of the sub-air ducts 151 are communicated with the first fan receiving cavity 141, the other two sub-air ducts 151 are communicated with the second fan receiving cavity 142, the first fan assembly 31 includes a first fan member 311 and a second fan member 312, the second fan assembly 32 includes a third fan member 321 and a fourth fan member 322, the first air inlet 171 includes a first sub-air inlet 171a corresponding to the first fan member 311 and a second sub-air inlet 171b corresponding to the second fan member 312, the second air inlet 172 includes a third sub-air inlet 172a corresponding to the third fan member 321 and a fourth sub-air inlet 172b corresponding to the fourth fan member 322, and the first fan member 311 is configured to provide the inlet air of the first sub-air inlet 171a to a corresponding portion of the air outlet via a corresponding one of the sub-air duct 151 The second fan member 312 is configured to provide the intake air from the second sub-intake 171b to a corresponding portion of the air outlet 16 through a corresponding one of the sub-air ducts 151, the third fan member 321 is configured to provide the intake air from the third sub-intake 172a to a corresponding portion of the air outlet 16 through a corresponding one of the sub-air ducts 151, and the fourth fan member 322 is configured to provide the intake air from the fourth sub-intake 172b to a corresponding portion of the air outlet 16 through a corresponding one of the sub-air ducts 151. It can be understood that, in this embodiment, the first sub air inlet 171a and the second sub air inlet 171b are located at one side of the second side wall structure 12 and at two ends corresponding to the upper and lower sides, the third sub air inlet 172a and the fourth sub air inlet 172b are located at the other side of the second side wall structure 12 and at two ends corresponding to the upper and lower sides, the first fan member 311 provides the inlet air of the first sub air inlet 171a to the corresponding portion of the air outlet 16 through the corresponding one of the sub air ducts 151, the second fan member 312 provides the inlet air of the second sub air inlet 171b to the corresponding portion of the air outlet 16 through the corresponding one of the sub air ducts 151, the third fan member 321 provides the inlet air of the third sub air inlet 172a to the corresponding portion of the air outlet 16 through the corresponding one of the sub air ducts 151, and the fourth fan member 322 provides the inlet air of the fourth sub air inlet 172b to the corresponding one of the sub air outlets 16 through the corresponding one of the sub air ducts 151 The duct 151 is provided to a corresponding portion of the air outlet 16, and it can be seen that the first fan part 311, the second fan part 312, the third fan part 321, and the fourth fan part 322 can output air together, and the sub-ducts 151 partitioned by the partition plate 115 respectively isolate the air output without mutual influence. The annular air duct 15 is divided into four sub-air ducts 151 by the partition plate 115, and meanwhile, the first fan assembly 31 is provided to include a first fan member 311 and a second fan member 312, the second fan assembly 32 includes a third fan member 321 and a fourth fan member 322, and the first air inlet 171 includes a first sub-air inlet 171a corresponding to the first fan member 311 and a second sub-air inlet 171b corresponding to the second fan member 312, the second air inlet 172 includes a third sub-air inlet 172a corresponding to the third fan member 321 and a fourth sub-air inlet 172b corresponding to the fourth fan member 322, so that the first fan member 311 provides the air from the first sub-air inlet 171a to a corresponding part of the air outlets 16 via a corresponding one of the sub-air inlets 151, and the second fan member 312 provides the air from the second sub-air inlet 171b to a corresponding part of the air outlets 16 via a corresponding one of the sub-air ducts 151, the third fan piece 321 provides the intake air of the third sub-air inlet 172a to the corresponding part of the air outlet 16 through the corresponding one of the sub-air channels 151, the fourth fan piece 322 provides the intake air of the fourth sub-air inlet 172b to the corresponding part of the air outlet 16 through the corresponding one of the sub-air channels 151, and the first fan piece 311, the second fan piece 312, the third fan piece 321, and the fourth fan piece 322 all have corresponding independent air inlet/outlet ports and air channels, so that the air outlet efficiency of the fan 1 can be improved, and meanwhile, the fan 1 can be ensured to have the minimum air noise at the same air volume, and a mute effect during use is achieved. Further, the first sidewall structure 11 includes a first annular edge 111 and a second annular edge 112 disposed oppositely, the first annular edge 111 includes a first edge 111a and a second edge 111b disposed oppositely, and a third edge 111c and a fourth edge 111d connected between the first edge 111a and the second edge 111b and disposed oppositely; the second sidewall structure 12 includes a third annular edge 121 and a fourth annular edge 122, the third annular edge 121 corresponds to the first annular edge 111, and includes a fifth edge 121a and a sixth edge 121b, which are oppositely disposed, and a seventh edge 121c and an eighth edge 121d, which are oppositely disposed, and are connected between the fifth edge 121a and the sixth edge 121b, the connecting portion 13 includes a first connecting portion 131 and a second connecting portion 132, which are oppositely disposed, the first connecting portion 131 is connected between the first edge 111a and the fifth edge 121a, the second connecting portion 132 is connected between the second edge 111b and the sixth edge 121b, the first connecting portion 131, and a portion of the second sidewall structure 12 connected to the first connecting portion 131 are used for enclosing the first fan receiving cavity 141, the second connecting portion 132 and a portion of the second sidewall structure 12 connected to the second connecting portion 132 are configured to enclose the second fan receiving cavity 142, the annular air duct 15 is located at the periphery of the first sidewall structure 11, two ends of the annular air duct are respectively communicated with the first fan receiving cavity 141 and the second fan receiving cavity 142, and the air outlet 16 is located between the second annular edge 112 and the fourth annular edge 122. The first fan receiving cavity 141 is defined by the first connecting portion 131 and a portion of the second sidewall structure 12 connected to the first connecting portion 131, and the second fan receiving cavity 142 is defined by the second connecting portion 132 and a portion of the second sidewall structure 12 connected to the second connecting portion 132, so that the first fan assembly 31 and the second fan assembly 32 are respectively received in the first fan receiving cavity 141 and the second fan receiving cavity 142, the air output of the fan 1 can be increased, the air output efficiency of the fan 1 is improved, meanwhile, the annular air duct 15 is disposed on the periphery of the first sidewall structure 11, two ends of the annular air duct are respectively communicated with the first fan receiving cavity 141 and the second fan receiving cavity 142, the air outlet 16 is located between the second annular edge 112 and the fourth annular edge 122, and the air output of the first fan assembly 31 and the second fan assembly 32 can be guided into the annular air duct 15 The air outlet 16 blows out air, and the air outlet efficiency of the fan 1 is further improved.

Specifically, the first connection portion 131 includes a first portion 131a and a second portion 131b, the first portion 131a connects the fifth edge 121a, a part of the seventh edge 121c, and a part of the eighth edge 121d, the second portion 131b connects the first edge 111a and extends toward the side where the second sidewall structure 12 is located to connect the first portion 131a, and the second portion 131b protrudes from the first edge 111a along the direction of the central axis of the ring shape of the first sidewall structure 11; the second connecting portion 132 includes a third portion 132a and a fourth portion 132b, the third portion 132a connects the sixth edge 121b, a part of the seventh edge 121c, and a part of the eighth edge 121d, the third portion 132a connects the second edge 111b and extends toward the side where the second sidewall structure 12 is located to connect the third portion 132a, and the fourth portion 132b protrudes from the second edge 111b along the direction of the central axis of the loop of the first sidewall structure 11, the connecting portion 13 further includes a third connecting portion 133 and a fourth connecting portion 134 which are oppositely disposed, the third connecting portion 133 is connected between the third edge 111c and the seventh edge 121c, the third connecting portion 133 is connected between the first connecting portion 131 and the second connecting portion 132, and the fourth connecting portion 134 is connected between the fourth edge 111d and the eighth edge 121d, the fourth connecting portion 134 is connected between the first connecting portion 131 and the second connecting portion 132, the extending portion 127 is connected to the fourth annular rim 122, the first connecting portion 131, a portion of the second sidewall structure 12 connected to the first connecting portion 131, and the extending portion 127 enclose the first fan receiving cavity 141, the second connecting portion 132, a portion of the second sidewall structure 12 connected to the second connecting portion 132, and the extending portion 127 enclose the second fan receiving cavity 142, and the second portion 131b, the fourth portion 132b, the third connecting portion 133, the fourth connecting portion 134, a portion of the extending portion 127 away from the fourth rim 111d, and the first sidewall structure 11 enclose the annular air duct 15. The first fan assembly 31, the second fan assembly 32 and the annular air duct 15 of the fan 1 can be enclosed in the casing 10 by enclosing the first connecting portion 131, a part of the second side wall structure 12 connected to the first connecting portion 131 and the extending portion 127 as the first fan receiving cavity 141, the second connecting portion 132, a part of the second side wall structure 12 connected to the second connecting portion 132 and the extending portion 127 as the second fan receiving cavity 142, and the second portion 131b, the fourth portion 132b, the third connecting portion 133, the fourth connecting portion 134, a part of the extending portion 127 away from the fourth edge 111d and the first side wall structure 11 as the annular air duct 15, so that the whole structure of the fan 1 is more compact, occupies less space and is convenient to carry, meanwhile, along the direction of the central axis of the ring shape of the first sidewall structure 11, the second portion 131b protrudes from the first edge 111a, and the fourth portion 132b protrudes from the second edge 111b, so that the volumes of the first fan receiving cavity 141, the second fan receiving cavity 142, and the annular air duct 15 can be increased, thereby increasing the air outlet of the fan 1 and improving the air outlet efficiency of the fan 1.

Further, the first air inlet 171 and the second air inlet 172 are both disposed on the second sidewall structure 12. By providing the first air inlet 171 and the second air inlet 172 on the second side wall structure 12, wind can be more efficiently introduced into the fan 1, so as to improve the air outlet efficiency of the fan 1.

Further, the second sidewall structure 12 includes a first sidewall portion 123, a second sidewall portion 124, a third sidewall portion 125 and a fourth sidewall portion 126 which are sequentially connected in a ring manner, wherein the first sidewall portion 123 and the third sidewall portion 125 are oppositely arranged; the first side wall portion 123 and the third side wall portion 125 each have a first end 123a and a second end 123b that are oppositely disposed in a length direction, the first air inlet opening 171 is disposed at the first end 123a of at least one of the first side wall portion 123 and the third side wall portion 125, and the second air inlet opening 172 is disposed at the second end 123b of at least one of the first side wall portion 123 and the third side wall portion 125. By providing the first air inlet opening 171 at the first end 123a of at least one of the first and third sidewall portions 123, 125 and providing the second air inlet opening 172 at the second end 123b of at least one of the first and third sidewall portions 123, 125, the first and second air inlet openings 171, 172 may be located at opposite ends of the second sidewall structure 12, respectively, so that the inlet air of the fan 1 is more balanced, thereby improving the inlet air efficiency of the fan 1.

Further, the fan 1 further comprises a fixing member 20 connected to the housing 10 for fixing the fan 1 to an external object; the fixing member 20 comprises a first fixing member 21 and a second fixing member 22, the first fixing member 21 is connected with the second side wall structure 12, the second fixing member 22 is connected with the second side wall structure 12, and the first fixing member 21 and the second fixing member 22 are used for abutting against two sides of the external object; at least one of the first and second fixtures 21 and 22 is rotatably coupled to the second sidewall structure 12. It can be understood that, in this embodiment, the fan 1 can be fixed (for example, clamped) on an external object through the fixing member 20, such as an edge of a display, a flat panel, or the like, and a push rod portion of the stroller, so as to blow air to the human body. First mounting 21 is connected the one end that is close to on the second lateral wall structure 12 fourth connecting portion 134, second mounting 22 rotate connect in on the second lateral wall structure 12, with first mounting 21 keeps a certain distance apart, and the user is when using fan 1, can be earlier fan 1 first mounting 21 butt external object on, like the computer display screen, can be earlier first mounting 21 card is in the front of the computer display screen, then will second mounting 22 butt is behind the computer display screen, thereby makes first mounting 21 with the common butt (like the centre gripping) both sides of computer display screen of second mounting 22, thereby will fan 1 fixes on the computer display screen. The second fixing member 22 is rotatably connected to the second sidewall structure 12, and an external object can be conveniently clamped and fixed or removed by rotating the second fixing member 22 to change the distance between one end of the second fixing member 22 and the clamped external object. Through setting up first mounting 21 with second mounting 22 can make fan 1 fixes on external article such as computer, panel, and the user of being convenient for uses, has enlarged fan 1's application range, and user experience is better, simultaneously, first mounting 21 with the centre gripping of second mounting 22 the both sides of external object can increase fan 1 and the fixed stability of external object have ensured fan 1 stability and the security of during operation, and, first mounting 21 with at least one rotation in the second mounting 22 connect in on second lateral wall structure 12, can be through rotating first mounting 21 with at least one in the second mounting 22 is right fan 1 fixes and takes, and the user of being convenient for uses, and user experience is better.

The fan disclosed by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained herein by applying specific examples, and the description of the above embodiments is only used to help understanding the fan and the core idea thereof; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

Claims (11)

1. A fan, characterized in that the fan comprises:

the air outlet is an annular air outlet or comprises a plurality of sub air outlets which are annularly arranged corresponding to the annular air channel, the air inlet comprises a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively communicated with two opposite ends of the annular air channel;

and the fan assembly is positioned in the fan receiving cavity and used for blowing the air of the air inlet out of the air outlet through the annular air duct.

2. The fan of claim 1, wherein the first air inlet and the second air inlet are both disposed on the second sidewall structure, the housing further includes an air inlet baffle, the air inlet baffle is connected to the second sidewall structure and respectively covered on the first air inlet and the second air inlet, and an air inlet gap is further formed between the air inlet baffle and the second sidewall structure, so that the first air inlet and the second air inlet both achieve air inlet of the fan through the air inlet gap.

3. The fan as claimed in claim 1, wherein the extension portion is connected to an end of the second sidewall structure away from the connecting portion, and the end of the extension portion away from the second sidewall structure and the end of the first sidewall structure away from the connecting portion respectively enclose two air outlets, which are slit air outlets facing the side where the connecting portion is located; the first side wall structure further encloses a hollow air outlet channel, and air outlet of the air outlet is accelerated and converged in the air outlet channel and then blown out from one side of the connecting portion.

4. The fan as claimed in claim 3, wherein the first sidewall structure includes a first arc-shaped sidewall protruding toward an inner side, the second sidewall structure includes a second arc-shaped sidewall protruding toward a side away from the first sidewall structure, and a distance between the first arc-shaped sidewall and the second arc-shaped sidewall gradually increases and decreases in a direction from the connection portion to the extension portion; the outer surface of the first arc-shaped side wall, which is far away from the second side wall structure, is an arc-shaped surface protruding towards the inner side and used for guiding the wind of the air outlet towards one side where the connecting part is located.

5. The fan of claim 1, wherein the fan assembly comprises a first fan assembly and a second fan assembly, and the fan receiving chamber comprises a first fan receiving chamber and a second fan receiving chamber located at two ends of the annular air duct and respectively communicated with the annular air duct: the first air inlet is communicated with the first fan accommodating cavity, and the first fan assembly is positioned in the first fan accommodating cavity and corresponds to the first air inlet; the second air inlet is communicated with the second fan containing cavity, and the second fan assembly is located in the second fan containing cavity and corresponds to the second air inlet.

6. The fan of claim 5, wherein the housing further comprises a partition plate that divides the annular air duct into four sub-air ducts, two of the sub-air ducts communicate with the first fan receiving chamber, and the other two of the sub-air ducts communicate with the second fan receiving chamber, the first fan assembly includes a first fan member and a second fan member, the second fan assembly includes a third fan member and a fourth fan member, the first air inlet includes a first sub-air inlet corresponding to the first fan member and a second sub-air inlet corresponding to the second fan member, and the second air inlet includes a third sub-air inlet corresponding to the third fan member and a fourth sub-air inlet corresponding to the fourth fan member:

the first fan part is used for providing the inlet air of the first sub air inlet to the corresponding part of the air outlet through the corresponding sub air duct,

the second fan part is used for providing the inlet air of the second sub air inlet to the corresponding part of the air outlet through the corresponding sub air duct,

the third fan element is used for providing the inlet air of the third sub air inlet to the corresponding part of the air outlet through the corresponding sub air duct,

the fourth fan element is used for providing the inlet air of the fourth sub air inlet to the corresponding part of the air outlet through the corresponding sub air duct.

7. The fan as claimed in claim 5,

the first sidewall structure comprises a first annular edge and a second annular edge which are oppositely arranged, the first annular edge comprises a first edge and a second edge which are oppositely arranged, and a third edge and a fourth edge which are connected between the first edge and the second edge and are oppositely arranged;

the second sidewall structure includes third and fourth oppositely disposed annular rims, the third annular rim corresponding to the first annular rim and including fifth and sixth oppositely disposed edges and seventh and eighth oppositely disposed edges connected between the fifth and sixth edges,

the connecting part comprises a first connecting part and a second connecting part which are oppositely arranged, the first connecting part is connected between the first edge and the fifth edge, the second connecting part is connected between the second edge and the sixth edge,

the first connecting portion, the part of connecting first connecting portion the second side wall structure is used for enclosing into first fan accomodates the chamber, the second connecting portion with connect the part of second connecting portion the second side wall structure is used for enclosing into the second fan accomodates the chamber, annular wind channel is located first side wall structure periphery and both ends respectively with first fan accomodate the chamber with the chamber intercommunication is accomodate to the second fan, the air outlet is located second annular edge with between the fourth annular edge.

8. The fan as claimed in claim 7,

the first connecting portion includes a first portion and a second portion, the first portion connects the fifth edge, the seventh edge, and the eighth edge, the second portion connects the first edge and extends toward the side where the second sidewall structure is located to connect the first portion, and the second portion protrudes from the first edge in the direction of the central axis of the loop of the first sidewall structure;

the second connecting portion includes a third portion and a fourth portion, the third portion connects the sixth edge, a part of the seventh edge and a part of the eighth edge, the third portion connects the second edge and extends toward one side of the second sidewall structure to connect the third portion, and the fourth portion protrudes from the second edge along a direction of a circular central axis of the first sidewall structure,

the connecting part also comprises a third connecting part and a fourth connecting part which are oppositely arranged, the third connecting part is connected between the third edge and the seventh edge, the third connecting part is connected between the first connecting part and the second connecting part, the fourth connecting part is connected between the fourth edge and the eighth edge, and the fourth connecting part is connected between the first connecting part and the second connecting part,

the extension part is connected with the fourth annular edge, the first connecting part, part of the second side wall structure connected with the first connecting part and the extension part enclose the first fan containing cavity, the second connecting part, part of the second side wall structure connected with the second connecting part and the extension part enclose the second fan containing cavity,

the second portion, the fourth portion, the third connecting portion, the fourth connecting portion, a portion of the extending portion away from the fourth edge, and the first side wall structure enclose the annular air duct.

9. The fan as claimed in claim 8, wherein the first intake vent and the second intake vent are both disposed on the second sidewall structure.

10. The fan as claimed in claim 9, wherein the second sidewall structure includes a first sidewall portion, a second sidewall portion, a third sidewall portion and a fourth sidewall portion connected in sequence, the first sidewall portion and the third sidewall portion being disposed opposite to each other; the first side wall portion and the third side wall portion each have a first end and a second end disposed opposite to each other in a length direction, the first air inlet is disposed at the first end of at least one of the first side wall portion and the third side wall portion, and the second air inlet is disposed at the second end of at least one of the first side wall portion and the third side wall portion.

11. The fan as claimed in claim 1, further comprising a fixing member connected to the housing for fixing the fan to an external object; the fixing piece comprises a first fixing piece and a second fixing piece, the first fixing piece is connected with the second side wall structure, the second fixing piece is connected with the second side wall structure, and the first fixing piece and the second fixing piece are used for clamping two sides of the external object; at least one of the first and second fixtures is pivotally coupled to the second sidewall structure.

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