Centrifugal fan and outdoor advertising machine

Abstract

The utility model discloses a centrifugal fan and an outdoor advisement player, the outdoor advisement player is provided with the centrifugal fan, the centrifugal fan comprises a shell and an impeller, the shell is provided with a containing space, an air inlet and an air outlet, and the shell comprises a front cover plate, a rear cover plate and a surrounding plate; the coaming comprises a worm-shaped main body part and two side walls, the two side walls are connected to the two ends of the worm-shaped main body part respectively to jointly define an air outlet channel, and the air inlet, the containing space, the air outlet channel and the air outlet are arranged in a communicating mode; one of the two side walls is provided with a volute tongue which protrudes inwards, a first arc-shaped part which is connected with the volute tongue and is bent inwards, and a second arc-shaped part which is connected with the first arc-shaped part and is bent outwards; the impeller is installed in the containing space, and the impeller is arranged close to the volute tongue. The structure formed by the volute tongue, the first arc-shaped part and the second arc-shaped part conforms to the airflow field of the centrifugal fan, the stability of the air pressure, the air speed and the air volume can be ensured, air outlet is more uniform, the air outlet volume is larger and more stable, and the heat dissipation effect can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cooling device technical field especially relates to a centrifugal fan and outdoor advertising machine. BACKGROUND

[0002] As Figure 1 The centrifugal fan 100 of the related art includes a centrifugal fan volute, and the air outlet of the centrifugal fan volute is a vertical air outlet structure, which causes the air outlet to be relatively concentrated and the air outlet area to be limited. When the centrifugal fan 100 is assembled to the equipment 200 that needs to be cooled, the cooling gas can only be blown to a certain area of the equipment 200, which easily causes the temperature of the area of the equipment 200 far from the centrifugal fan 100 to be generally higher than the temperature of the area of the equipment 200 close to the air outlet of the centrifugal fan 100, and thus the cooling effect is poor. SUMMARY

[0003] The utility model provides a centrifugal fan and outdoor advertising machine.

[0004] The utility model adopts the technical scheme in the technical solutions: a centrifugal fan is constructed, which comprises:

[0005] A housing is formed with an accommodation space, an air inlet, and an air outlet. The housing comprises a front cover plate, a rear cover plate, and a surrounding plate. The front cover plate and the rear cover plate are connected by the surrounding plate. The surrounding plate comprises a volute main body portion and two side walls. The two side walls are connected to the two ends of the volute main body portion, respectively, to jointly define an air outlet channel. The air inlet, the accommodation space, the air outlet channel, and the air outlet are arranged in communication. One of the two side walls is provided with a volute tongue protruding inward, a first arc-shaped portion connected with the volute tongue and bending inward, and a second arc-shaped portion connected with the first arc-shaped portion and bending outward.

[0006] An impeller is installed in the accommodation space, and the impeller is arranged close to the volute tongue.

[0007] In some embodiments, the first arc-shaped portion and the second arc-shaped portion are arranged continuously, and the first arc-shaped portion and the second arc-shaped portion gradually extend outward.

[0008] In some embodiments, the volute tongue has a V-shaped structure.

[0009] In some embodiments, the other of the two side walls is provided with a third arc-shaped portion bending outward.

[0010] In some embodiments, the height dimension of the third arc-shaped portion is equal to the sum of the height dimensions of the first arc-shaped portion and the second arc-shaped portion.

[0011] In some embodiments, the radius of the first arc-shaped portion is 20-30 mm, and the arc length of the first arc-shaped portion is 20-30 mm.

[0012] In some embodiments, the radius of the second arc-shaped portion is 20-30 mm, and the arc length of the second arc-shaped portion is 20-30 mm.

[0013] In some embodiments, the included angle of the volute tongue is 80° to 100°.

[0014] In some embodiments, the shape of the volute body portion is an equiangular spiral or an Archimedes spiral.

[0015] The utility model also provides an outdoor advertising machine, including outdoor advertising machine body, and with the outdoor advertising machine body connection's centrifugal fan as above -mentioned embodiment.

[0016] The utility model discloses have the following beneficial effects: the outdoor advertising machine is provided with centrifugal fan, and the centrifugal fan includes casing and impeller, and the casing includes front cover, back cover and baffle, one side wall of two side walls is provided with the volute tongue that is inwards convex, the first arc-shaped portion that is connected with the volute tongue and is inwards bent and the second arc-shaped portion that is connected with the first arc-shaped portion and is outwards bent, and the volute tongue, the first arc-shaped portion and the second arc-shaped portion form the structure that more conforms to the airflow flow field of centrifugal fan, can ensure that the wind pressure, the wind speed and the wind volume are stable, make the air outlet more uniform and the air outlet volume is bigger and more stable, can improve the heat dissipation effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings and embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, under the premise of not paying creative labor, other related drawings can also be obtained according to these drawings. In the drawings:

[0018] Figure 1 It is the structural diagram of the related art centrifugal fan volute;

[0019] Figure 2 It is the front structure schematic diagram of the centrifugal fan in some embodiments of the utility model;

[0020] Figure 3 It is the back structure schematic diagram of the centrifugal fan in some embodiments of the utility model;

[0021] Figure 4 It is the exploded view of the centrifugal fan in some embodiments of the utility model;

[0022] Figure 5 is a schematic diagram of airflow flow direction of a centrifugal fan in some embodiments of the utility model;

[0023] Figure 6 is a schematic diagram of partial structure parameters of a volute of a centrifugal fan in some embodiments of the utility model;

[0024] Figure 7 is an outdoor advertising machine in some embodiments of the utility model.

[0025] Among them, the sign:

[0026] 10. shell;10a. containing space;10b. air inlet;10c air outlet;10d. air outlet passage;11. front cover plate;12. back cover plate;121. mounting portion;13. coaming;131. volute main body portion;132. first side wall;1321. volute tongue;1322. first arc-shaped portion;1323. second arc-shaped portion;133. second side wall;1331. third arc-shaped portion;30. outdoor advertising machine;31. outdoor advertising machine body;32. base. DETAILED DESCRIPTION

[0027] In order to have more clear understanding on the technical features, objects and effects of the utility model, the specific implementation manners of the utility model will be described in detail by referring to the drawings. In the following description, it should be understood that the directions or position relations indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" are based on the directions or position relations shown in the drawings, the particular directions are constructed and operated, and are only for the convenience of describing the technical scheme, and cannot be understood as indicating that the indicated device or element must have the particular direction, so it cannot be understood as the limitation on the utility model.

[0028] It should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In the following description, specific details are set forth such as specific system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application for purposes of explanation and not of limitation. However, it will be apparent to those skilled in the art that the present application can be realized in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary details.

[0030] Referring to Figures 2 to 5 The present application shows a centrifugal fan which can be applied to occasions or products with large and uniform wind area, for example, electronic products such as liquid crystal display screens of outdoor advertising machines.

[0031] Referring to Figures 2 to 5 In some embodiments, the centrifugal fan includes a housing 10 and an impeller 20, wherein the housing 10 is formed with a containing space 10a, an air inlet 10b and an air outlet 10c, the housing 10 includes a front cover plate 11, a rear cover plate 12 and a surrounding plate 13, the front cover plate 11 and the rear cover plate 12 are connected through the surrounding plate 13, the front cover plate 11 is provided with the air inlet 10b, as Figure 2 shown, the end portions of the front cover plate 11, the rear cover plate 12 and the surrounding plate 13 jointly enclose the air outlet 10c. The air inlet 10b can be circular, and the air outlet 10c can be rectangular, which is not specifically limited here.

[0032] The baffle 13 comprises a volute body portion 131 and two side walls connected to two ends of the volute body portion 131 to jointly define an air outlet channel 10d, and the air inlet 10b, the accommodating space 10a, the air outlet channel 10d and the air outlet 10c are arranged in communication. One of the two side walls is provided with a volute tongue 1321 protruding inward, a first arc-shaped portion 1322 connected to the volute tongue 1321 and curved inward, and a second arc-shaped portion 1323 connected to the first arc-shaped portion 1322 and curved outward, and the airflow can be guided out of the air outlet 10c along the inner side walls of the first arc-shaped portion 1322 and the second arc-shaped portion 1323. Further, the two side walls can comprise a first side wall 132 and a second side wall 133, and the first side wall 132 has the volute tongue 1321, the first arc-shaped portion 1322 and the second arc-shaped portion 1323.

[0033] The impeller 20 is installed in the accommodating space 10a and arranged close to the volute tongue 1321, and the axial end face of the impeller 20 is arranged opposite to the air inlet 10b, wherein the impeller 20 rotates in a rotation direction to form an airflow introduced from the air inlet 10b, flowing through the accommodating space 10a and being guided out of the air outlet 10c through the air outlet channel 10d. The rotation direction can be a clockwise rotation direction as shown. Figure 5

[0034] The structure formed by the volute tongue 1321, the first arc-shaped portion 1322 and the second arc-shaped portion 1323 is more consistent with the airflow flow field of the centrifugal fan, which can ensure the stability of the air pressure, air speed and air volume, make the air outlet more uniform and the air outlet volume larger and more stable, and improve the heat dissipation effect.

[0035] In some embodiments, the first arc-shaped portion 1322 and the second arc-shaped portion 1323 are arranged continuously, and the first arc-shaped portion 1322 and the second arc-shaped portion 1323 gradually extend outward, so that the cross-sectional area of the air outlet channel 10d gradually increases from the side close to the accommodating space 10a to the side close to the air outlet 10c, so that the air outlet channel 10d can guide the airflow, and the air outlet area can be increased, which is beneficial to improve the uniformity and stability of the air outlet, and further improve the air outlet effect.

[0036] In some embodiments, the volute tongue 1321 has a V-shaped structure. When the impeller 20 is working, the airflow enters the accommodating space 10a from the air inlet 10b and flows, and the flow direction can be as shown. Figure 5 ​As shown, due to the presence of the volute tongue 1321, the airflow enters the space above the volute tongue 1321 and is less likely to flow back to the space below the volute tongue 1321, thus effectively utilizing the airflow and improving the efficiency of the impeller 20. Furthermore, the inward protrusion of the volute tongue 1321 reduces the gap between the volute tongue 1321 and the second sidewall 133 of the enclosure plate 13, allowing the receiving space 10a to form an airflow pressurization space, thereby pressurizing the airflow.

[0037] like Figures 2 to 5 As shown, one of the two sidewalls is provided with an outwardly curved third arc-shaped portion 1331. For example, the second sidewall 133 may be provided with the third arc-shaped portion 1331, which, together with the upper part of the volute tongue 1321, the first arc-shaped portion 1322, and the second arc-shaped portion 1323, defines the air outlet channel 10d.

[0038] In some embodiments, the height of the third arcuate portion 1331 is equal to the sum of the heights of the first arcuate portion 1322 and the second arcuate portion 1323. For example... Figure 5 As shown, the upper part of the third arc-shaped portion 1331 can be flush with the plane where the upper part of the second arc-shaped portion 1323 is located, and the lower part of the third arc-shaped portion 1331 can be flush with the plane where the lower part of the first arc-shaped portion 1322 is located.

[0039] In some embodiments, the radius of the first arcuate portion 1322 is 20-30 mm, and the arc length of the first arcuate portion 1322 is 20-30 mm. For example, the radius of the first arcuate portion 1322 can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, or 30 mm. Preferably, such as... Figure 6 As shown, the radius of the first arc-shaped portion 1322 is 21 mm. The arc length of the first arc-shaped portion 1322 can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, or 30 mm. Preferably, the arc length of the first arc-shaped portion 1322 can be 22 mm. Of course, the radius and arc length of the first arc-shaped portion 1322 can be selected and set according to actual needs, and no specific limitation is made here.

[0040] In some embodiments, the radius of the second arcuate portion 1323 is 20-30 mm, and the arc length of the second arcuate portion 1323 is 20-30 mm. For example, the radius of the second arcuate portion 1323 can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, or 30 mm. Preferably, such as... Figure 6As shown, the radius of the second arc-shaped portion 1323 is 25 mm. The arc length of the second arc-shaped portion 1323 can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, or 30 mm. Preferably, the arc length of the second arc-shaped portion 1323 can be 26 mm. Of course, the radius and the arc length of the second arc-shaped portion 1323 can be selected according to actual needs, which are not specifically limited here.

[0041] In some embodiments, the included angle of the cochlea tongue 1321 is 80° to 100°. The included angle of the cochlea tongue 1321 is 80 to 100 degrees. Where the two sides of the cochlea tongue 1321 can be plate-shaped structures, the included angle of the cochlea tongue 1321 is the included angle between the two sides of the cochlea tongue 1321. Alternatively, the two sides of the cochlea tongue 1321 can be micro-arc-shaped structures, and the included angle of the cochlea tongue 1321 is the included angle between the tangents of the two sides of the cochlea tongue 1321. The included angle of the cochlea tongue 1321 can be 80°, 90°, or 100°, preferably, as Figure 6 As shown, the included angle of the cochlea tongue 1321 can be 90°. Of course, in other embodiments, the cochlea tongue 1321 can also be a U-shaped structure, a half-moon-shaped structure, or other structures, and the structure can be adjusted according to actual needs, which are not specifically limited here.

[0042] In some embodiments, the radius of the third arc-shaped portion 1331 is 40-60 mm, and the arc length of the third arc-shaped portion 1331 is 40-60 mm. For example, the radius of the third arc-shaped portion 1331 can be 40 mm, 41 mm, 42 mm, 43 mm, 44 mm, 45 mm, 46 mm, 47 mm, 48 mm, 49 mm, 50 mm, 51 mm, 52 mm, 53 mm, 54 mm, 55 mm, 56 mm, 57 mm, 58 mm, 59 mm, or 60 mm, preferably, as Figure 6 As shown, the radius of the third arc-shaped portion 1331 is 50 mm. The arc length of the third arc-shaped portion 1331 can be 40 mm, 41 mm, 42 mm, 43 mm, 44 mm, 45 mm, 46 mm, 47 mm, 48 mm, 49 mm, 50 mm, 51 mm, 52 mm, 53 mm, 54 mm, 55 mm, 56 mm, 57 mm, 58 mm, 59 mm, or 60 mm, preferably, the arc length of the third arc-shaped portion 1331 can be 42 mm. Of course, the radius and the arc length of the third arc-shaped portion 1331 can be selected according to actual needs, which are not specifically limited here.

[0043] In some embodiments, the shape of the cochlea body portion 131 is an equiangular spiral or an Archimedes spiral.

[0044] In some embodiments, the front cover plate 11 and the surrounding plate 13 can be an integral structure, both forming a front cover assembly, when assembling the centrifugal fan, the impeller 20 can be first installed on the rear cover plate 12, and then the front cover assembly and the rear cover plate 12 are connected and fixed. Alternatively, the rear cover plate 12 and the surrounding plate 13 can be an integral structure, both forming a rear cover assembly, when assembling the centrifugal fan, the impeller 20 can be first installed on the rear cover plate 12, and then the front cover plate 11 and the rear cover assembly are connected and fixed. The impeller 20 can be installed on the rear cover plate 12 by a fastener, including but not limited to a bolt or a screw. In some embodiments, the rear cover plate 12 is also provided with a wire hole for the wiring of the motor of the impeller 20 to pass out.

[0045] In some embodiments, the rear cover plate 12 is also provided with a mounting portion 121, which is a portion of the rear cover plate 12 protruding from the outer circumference of the surrounding plate 13. The mounting portion 121 can be used to connect with a mounting structure, including the side wall of the device, etc. A plurality of mounting holes can be provided on the mounting portion 121 to cooperate with a fixing member for fixation, including but not limited to a bolt or a screw.

[0046] In some embodiments, the front cover plate 11, the rear cover plate 12 and the surrounding plate 13 can be made of a metal material, including but not limited to stainless steel or aluminum alloy, or the front cover plate 11, the rear cover plate 12 and the surrounding plate 13 can be made of a hard non-metallic material, including but not limited to phenolic plastic, polyurethane plastic, epoxy plastic, unsaturated polyester plastic, furan plastic, silicone resin, propylene-based resin, etc.

[0047] As shown in Figure 7 In some embodiments, the utility model also discloses an outdoor advertising machine 30, including outdoor advertising machine body 31 and centrifugal fan connected with outdoor advertising machine body 31. The shell of the outdoor advertising machine body 31 can be provided with a plurality of heat dissipation holes, the outdoor advertising machine body 31 is installed on the base 32, the centrifugal fan can be installed in the base 32, and the air outlet 10c of the centrifugal fan is arranged towards the internal electronic device of the outdoor advertising machine body 31, for air cooling operation of the outdoor advertising machine body 31. Since the centrifugal fan has large air volume, large air outlet area and uniform air outlet, it can effectively dissipate heat for the outdoor advertising machine body 31.

[0048] It can be understood that the above embodiments only express the preferred embodiments of the utility model, the description is more specific and detailed, but it can not be understood as the limitation of the utility model patent scope; it should be pointed out that for ordinary skilled person in the art, the above technical features can be freely combined without departing from the concept of the utility model, and a number of modifications and improvements can be made, which belong to the protection scope of the utility model; therefore, any equivalent transformation and modification within the scope of the utility model patent claim should belong to the scope of the utility model patent claim.

Claims

1. A centrifugal fan characterized by comprising: The application relates to a centrifugal fan, which comprises a shell (10) and an impeller (20). The shell (10) is formed with a containing space (10a), an air inlet (10b) and an air outlet (10c), and comprises a front cover plate (11), a rear cover plate (12) and a surrounding plate (13), wherein the front cover plate (11) and the rear cover plate (12) are connected through the surrounding plate (13); the surrounding plate (13) comprises a volute main body part (131) and two side walls connected to two ends of the volute main body part (131) to jointly define an air outlet channel (10d), and the air inlet (10b), the containing space (10a), the air outlet channel (10d) and the air outlet (10c) are communicated; one side wall of the two side walls is provided with a volute tongue (1321) protruding inward, a first arc-shaped part (1322) connected with the volute tongue (1321) and bending inward, and a second arc-shaped part (1323) connected with the first arc-shaped part (1322) and bending outward. The impeller (20) is installed in the containing space (10a) and arranged close to the volute tongue (1321).

2. The centrifugal fan according to claim 1, characterized in that The first arc-shaped part (1322) and the second arc-shaped part (1323) are continuously arranged and gradually extend outward.

3. The centrifugal fan according to claim 1, wherein The volute tongue (1321) has a V-shaped structure.

4. The centrifugal fan according to claim 1, characterized in that The other side wall of the two side walls is provided with a third arc-shaped part (1331) bending outward.

5. The centrifugal fan according to claim 4, wherein The height of the third arc-shaped part (1331) is equal to the sum of the heights of the first arc-shaped part (1322) and the second arc-shaped part (1323).

6. The centrifugal fan according to any one of claims 1 to 5, characterized in that The radius of the first arc-shaped part (1322) is 20-30 mm, and the arc length of the first arc-shaped part (1322) is 20-30 mm.

7. The centrifugal fan according to any one of claims 1 to 5, characterized in that The radius of the second arc-shaped part (1323) is 20-30 mm, and the arc length of the second arc-shaped part (1323) is 20-30 mm.

8. The centrifugal fan according to any one of claims 1 to 5, characterized in that The included angle of the volute tongue (1321) is 80-100 degrees.

9. The centrifugal fan according to any one of claims 1 to 5, characterized in that The volute main body part (131) has an equiangular spiral shape or an Archimedes spiral shape.

10. An outdoor advertising machine characterized by comprising: The application further relates to an outdoor advertising machine, which comprises an outdoor advertising machine body and the centrifugal fan as claimed in any one of claims 1 to 9.

Images