Vehicle, engine assembly and air-cooling device

Abstract

The present invention relates to a vehicle, an engine assembly and an air cooling device. By using a barrier member, the amount of air flowing back from the flow guiding side wall to the volute tongue and then recirculating into the air inlet passage can be significantly reduced, thereby avoiding the generation of whistling noise at the volute tongue. At the same time, the barrier member can further guide the cooling air flowing into the flow guiding passage from the air outlet, so that the cooling air can better flow along the extension trajectory of the flow guiding passage, avoiding or reducing the collision of the cooling air with the inner side wall of the flow guiding passage far from the high heat load components, thereby avoiding the energy loss of the cooling air and ensuring that the cooling air can flow as much as possible to exchange heat with high heat load components such as the cylinder head or cylinder block to ensure the cooling effect. Moreover, due to the guiding effect of the barrier member on the cooling air, the cooling air can flow more concentratedly at a higher flow rate to contact high heat load components such as the cylinder head or cylinder block, improving the cooling effect.

Description

Technical Field

[0001] The present invention relates to the technical field of transportation, and particularly to a vehicle, an engine assembly and an air-cooling device. Background Art

[0002] Vehicles such as two-wheel scooters usually use air-cooling to cool relevant components of the engine. Among them, the air-cooling device includes a fan and a wind guide cover communicated with the air outlet of the fan. The cold air of the fan is conveyed to components such as the cylinder head or cylinder block with high heat load through the wind guide cover for convective heat transfer.

[0003] With the continuous increase in the power of the engine, the heat load of relevant components has risen sharply, and more cold air is required to cool them. The traditional method is to increase the specification of the fan, that is, to increase the diameter of the blades, which will inevitably increase the size of the fan cover accordingly. However, since the frame is around the fan, the size of the fan cover needs to match the structure of the frame. When the diameter of the blades increases and the outward expansion of the fan cover is limited, the distance between the blades and the fan cover will become smaller, resulting in whistling noise. Summary of the Invention

[0004] Based on this, in view of the problem of whistling noise, it is necessary to provide a vehicle, an engine assembly and an air-cooling device.

[0005] The technical solution is as follows:

[0006] On the one hand, an air-cooling device is provided, including:

[0007] A fan, the fan includes a fan cover provided with an air outlet, and a volute tongue and a guiding side wall are relatively and spaced apart at the air outlet of the fan cover, and the distance from the volute tongue to the blade is less than the distance from the guiding side wall to the blade;

[0008] A wind guide cover, the wind guide cover is provided with a guiding channel, and the wind guide cover is connected to the fan cover so that the guiding channel is communicated with the air outlet; and

[0009] A barrier member, the barrier member is disposed in the guiding channel and connected to the wind guide cover, and the barrier member is used to block the wind flowing out from the guiding side wall from flowing back towards the volute tongue.

[0010] The technical solution is further described below:

[0011] In one embodiment, the extending direction of the barrier member is arranged at an angle with the tangent of the guiding side wall, and the projection of the barrier member at the air outlet is located between the volute tongue and the guiding side wall.

[0012] In one embodiment, the included angle between the extending direction of the barrier member and the tangent of the guiding sidewall is θ, where 0° ≤ θ < 90°.

[0013] In one embodiment, the projection of the end of the barrier member away from the fan cover at the air outlet falls on the lowermost end of the volute tongue.

[0014] In one embodiment, the end of the barrier member close to the fan cover is located at the connecting part of the fan cover and the air guiding cover.

[0015] In one embodiment, the barrier member is rotatably connected to the air guiding cover to adjust the included angle between the extending direction of the barrier member and the tangent of the guiding sidewall.

[0016] In one embodiment, there are at least two barrier members, and the at least two barrier members are arranged at intervals, and adjacent two barrier members form a diversion sub-channel.

[0017] In one embodiment, the air guiding cover includes a first cover body and a second cover body. The first cover body and the second cover body are connected to form the diversion channel. The first cover body is arranged closer to the guiding sidewall relative to the second cover body, and the second cover body is arranged closer to the volute tongue relative to the first cover body. At least one barrier member is connected to the first cover body, and at least one barrier member is connected to the second cover body.

[0018] On the other hand, an engine assembly is provided, including the air cooling device described above.

[0019] On yet another aspect, a vehicle is provided, including the engine assembly described above.

[0020] For the vehicle, engine assembly and air cooling device of the above embodiments, the barrier member can significantly reduce the amount of air flowing back from the guiding sidewall to the volute tongue and then re-circulating into the air inlet channel, thereby avoiding the generation of whistling noise at the volute tongue. At the same time, the barrier member can further guide the cooling air flowing into the diversion channel from the air outlet, so that the cooling air can flow better along the extending trajectory of the diversion channel, avoiding or reducing the collision of the cooling air with the inner sidewall of the diversion channel away from the cylinder head or cylinder block fins, thereby avoiding energy loss of the cooling air and ensuring that the cooling air can flow to the high-heat load components such as the cylinder head or cylinder block for heat exchange as much as possible to ensure the cooling effect. Moreover, by using the guiding effect of the barrier member on the cooling air, the cooling air can flow more concentratedly at a higher flow rate to contact the high-heat load components such as the cylinder head or cylinder block, improving the cooling effect. Description of the Drawings

[0021] The accompanying drawings, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0023] Figure 1 Schematic structural diagram of an air-cooling device for an embodiment;

[0024] Figure 2 For Figure 1 Schematic structural diagram of the fan of the air-cooling device;

[0025] Figure 3 (a) Cooling air distribution diagram of a traditional air-cooling device;

[0026] Figure 3 (b) Cooling air distribution diagram of the Figure 1 air-cooling device;

[0027] Figure 4 Cooling diagram of the cooling air of a traditional air-cooling device for high-heat load components;

[0028] Figure 5 For Figure 1 Cooling diagram of the cooling air of the air-cooling device for high-heat load components.

[0029] Explanation of reference numerals:

[0030] 100, fan; 110, fan cover; 111, air outlet; 112, volute tongue; 113, guide side wall; 114, air inlet channel; 120, blade; 200, air guide cover; 210, diversion channel; 220, first cover body; 230, second cover body; 300, barrier member; 310, diversion sub-channel; 400, high-heat load component. Detailed implementation manners

[0031] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] In one embodiment, an air cooling device is provided, which can cool down high heat load components such as a cylinder head or a cylinder block on an engine.

[0033] like Figure 1 and Figure 2 As shown, optionally, the air cooling device includes a fan 100 , an air guide cover 200 and a blocking member 300 .

[0034] The fan 100 is used to draw in external air to convert it into cooling air to cool down high heat load components.

[0035] like Figure 1 and Figure 2 As shown, specifically, the fan 100 includes a fan cover 110 and blades 120 .

[0036] More specifically, the fan cover 110 is provided with an air inlet (not marked) and an air outlet 111 that are connected to each other, the air inlet and the air outlet 111 are connected to form an air inlet channel 114, the blades 120 are arranged in the air inlet channel 114 and are arranged toward the air inlet, and the blades 120 and the fan cover 110 are rotatably connected by bearings and other components. When the blades 120 rotate, the outside air enters the air inlet channel 114 through the air inlet and finally flows out from the air outlet 111.

[0037] Optionally, the air outlet 111 is located at a side of the air inlet, so that when the blade 120 rotates, high-speed air is thrown out from the edge of the blade 120 .

[0038] The fan 100 may be a centrifugal fan, which may allow the air flow path to be an Archimedean spiral curve air duct.

[0039] Furthermore, a relatively spaced volute tongue 112 and a guide side wall 113 are provided at the air outlet 111 of the fan cover 110. Moreover, the distance from the volute tongue 112 to the blade 120 is smaller than the distance from the guide side wall 113 to the blade 120.

[0040] The blade 120 may be an existing component and is not limited here.

[0041] The blade 120 can be arranged concentrically with the air inlet to ensure the air intake. The distance between the edge of the blade 120 and the inner wall of the fan cover 110 forms an air flow channel and presents an Archimedean spiral curve air channel.

[0042] Specifically, the volute tongue 112 can be in the form of a convex hull. The extension locus of the flow guiding side wall 113 can be arc-shaped. In this way, the cooling air discharged from the edge of the blade 120 is discharged from the air outlet 111 under the guiding action of the flow guiding side wall 113. Moreover, the volute tongue 112 can, to a certain extent, prevent the cooling air discharged from the air outlet 111 from entering the air inlet passage 114 again, effectively weakening or eliminating noise.

[0043] As Figure 1 shown, the air guide cover 200 is provided with a flow guiding channel 210. When the air guide cover 200 is connected to the fan cover 110 by means of snap connection, screw connection or the like, the flow guiding channel 210 is communicated with the air outlet 111, so that the air flowing out of the air outlet 111 is guided through the flow guiding channel and then conveyed to cool high heat load components such as the cylinder head or the cylinder block 400.

[0044] Specifically, the air guide cover 200 can be of a housing structure.

[0045] The barrier member 300 is disposed in the flow guiding channel 210 and connected to the air guide cover 200.

[0046] Specifically, the barrier member 300 is used to prevent the air flowing out of the flow guiding side wall 113 from flowing back towards the volute tongue 112, thus significantly reducing the amount of air flowing back from the flow guiding side wall 113 to the volute tongue 112 and then circulating into the air inlet passage 114 again, and further avoiding the generation of whistling noise at the volute tongue 112.

[0047] During actual use, in order to provide more cold air to cool the high heat load components, even if the specification of the fan 100 is increased to make the diameter of the blade 120 larger and the distance between the edge of the blade 120 and the inner side wall of the fan cover 110 smaller, under the blocking action of the barrier member 300, the air flowing out of the air outlet 111 can be prevented from flowing back from the volute tongue 112 to the air inlet passage 114, and further the generation of whistling noise can be avoided. Moreover, without changing the vehicle layout and appearance, the cooling effect of the air cooling device can be enhanced, which is simple and convenient and reduces the use cost.

[0048] At the same time, the blocking member 300 can also be used to further guide the cooling air flowing into the guide channel 210 from the air outlet 111, so that the cooling air can flow better along the extension track of the guide channel 210, and can avoid or reduce the collision of the cooling air with the inner wall of the guide channel 210 away from the high heat load component 400, thereby avoiding energy loss of the cooling air, ensuring that the cooling air can flow to the cylinder head or cylinder body and other high heat load components 400 as much as possible for heat exchange, and ensuring the cooling effect. In addition, the blocking member 300 can guide the cooling air, so that the cooling air can flow more concentratedly at a higher flow rate to contact the cylinder head or cylinder body and other high heat load components 400, thereby improving the cooling effect.

[0049] The barrier 300 may be in the form of a barrier sheet or a barrier plate, and its specific contour shape is not limited, as long as it can block the cooling air flowing out from the guide side wall 113 from flowing back toward the volute tongue 112 .

[0050] Specifically, the extending direction of the barrier 300 is set at an angle to the tangent of the guide side wall 113, and the projection of the barrier 300 at the air outlet 111 is located between the volute tongue 112 and the guide side wall 113. In this way, the cooling air thrown out by the edge of the blade 120 flows out from the air outlet 111 and enters the guide channel 210 under the guiding effect of the guide side wall 113. The cooling air entering the guide channel 210 will not flow back from the volute tongue 112 to the air inlet channel 114 under the blocking effect of the barrier 300, thereby avoiding the generation of whistling noise. In addition, under the guiding effect of the barrier 300, the cooling air flowing in the guide channel 210 will not collide with the inner wall of the guide channel 210, thereby avoiding energy loss of the cooling air and ensuring the cooling effect. In addition, the blocking member 300 in the guide channel 210 makes the flow of the cooling air more concentrated, and also makes the cooling air flow at a higher flow rate to contact the high heat load component 400, thereby improving the cooling effect.

[0051] The tangent line of the guide side wall 113 refers to the tangent line of its extended trajectory line.

[0052] Among them, the projection of the blocking member 300 at the air outlet 111 is located between the volute tongue 112 and the guide side wall 113, which may refer to the projection of the blocking member 300 on the plane where the contour of the air outlet 111 is located is within the range of the contour, thereby ensuring that the cooling air entering the guide channel 210 will not flow back from the volute tongue 112 to the air inlet channel 114 again.

[0053] like Figure 1As shown, more specifically, the included angle between the extending direction of the barrier member 300 and the tangent of the guiding side wall 113 is θ, where 0° ≤ θ < 90°. In this way, the extending direction of the barrier member 300 can be a straight line, and the included angle between this straight line and the tangent of the guiding side wall 113 is θ. As a result, the cooling air ejected from the edge of the blade 120 can smoothly flow out to the guiding channel 210 through the guiding action of the guiding side wall 113 at the air outlet 111 without blocking the flow of the cooling air. At the same time, when the cooling air entering the guiding channel 210 flows back towards the volute tongue 112, the barrier member 300 can block the flowing-back air, preventing the cooling air from re-entering the air inlet channel 114 and circulating, and avoiding the generation of whistling noise.

[0054] Among them, θ can be 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70° or 80°.

[0055] Furthermore, the projection of the end of the barrier member 300 far from the fan cover 110 at the air outlet 111 falls on the lowermost end of the volute tongue 112, so that the tangent at the lowermost end of the volute tongue 112 passes through the end of the end of the barrier member 300 far from the fan cover 110. Furthermore, the barrier member 300 can better prevent the cooling air in the guiding channel 210 from flowing back towards the volute tongue 112 and can better avoid the generation of whistling noise.

[0056] Among them, the lowermost end of the volute tongue 112 refers to the end of the volute tongue 112 closest to the guiding side wall 113.

[0057] Among them, the position of the barrier member 300 in the guiding channel 210 can be flexibly designed or adjusted according to actual processing conditions and assembly conditions, as long as it can be ensured that the barrier member 300 can prevent the cooling air in the guiding channel 210 from flowing back towards the volute tongue 112.

[0058] Optionally, the end of the barrier member 300 close to the fan cover 110 is located at the connection part of the fan cover 110 and the air guiding cover 200. In this way, the distance between the barrier member 300 and the blade 120 is minimized, so that as little cooling air as possible entering the guiding channel 210 flows back into the air inlet channel 114 through the gap between the barrier member 300 and the blade 120 to generate circular flow, and the whistling noise can be effectively reduced.

[0059] Furthermore, the locus line of the connection part of the fan cover 110 and the air guiding cover 200 is tangent to the edge of the blade 120, so that the end of the barrier member 300 close to the fan cover 110 is tangent to the edge of the blade 120, which can prevent the cooling air entering the guiding channel 210 from flowing back into the air inlet channel 114 through the gap between the barrier member 300 and the blade 120 to generate circular flow, and can effectively eliminate the whistling noise.

[0060] In addition, the barrier member 300 and the air guide cover 200 can be separately formed and then connected by means such as screwing or clamping. The barrier member 300 can also be integrally formed with the air guide cover 200, saving processing costs.

[0061] Optionally, the barrier member 300 and the air guide cover 200 are rotatably connected by means such as hinging or pivoting, so that the angle between the extending direction of the barrier member 300 and the tangent of the diversion side wall 113 can be adjusted by rotating the barrier member 300. Furthermore, θ can be flexibly adjusted according to actual usage needs to meet the usage needs in different situations, with strong versatility.

[0062] In addition, the number of the barrier members 300 can also be flexibly designed or adjusted according to actual usage needs, as long as it can be ensured that the cooling air in the diversion channel 210 is prevented from flowing back towards the volute tongue 112 by the barrier member 300.

[0063] As Figure 1 shown, optionally, there are at least two barrier members 300, and the at least two barrier members 300 are arranged at intervals, and adjacent two barrier members 300 form a diversion sub-channel 310. In this way, the diversion channel 210 can be divided into multiple diversion sub-channels 310 with smaller flow cross-sectional areas by using at least two barrier members 300, so that the flow rate of the cooling air in the diversion sub-channels 310 is faster, and more cooling air can flow to contact the high heat load component 400, improving the cooling effect.

[0064] As Figure 3 (a) shows, in the traditional air guide cover 200, no barrier member 300 is provided. During the flow of the cooling air in the diversion channel 210, it collides with the inner side wall of the diversion channel 210, causing energy loss and also decreasing the flow rate of the cooling air. As a result, only a small amount of cooling air can flow to contact the high heat load component 400 (as Figure 4 shown, where the arrow represents the cooling air), and the cooling effect is poor.

[0065] As Figure 3 (b) shows, in the embodiment of the present application, a barrier member 300 is provided in the diversion channel 210. During the flow of the cooling air in the diversion channel 210, under the diversion action of the barrier member 300, no cooling air collides with the inner side wall of the diversion channel 210 or only a small amount of cooling air collides with the inner side wall of the diversion channel 210. The energy of the cooling air is not damaged, and the flow rate of the cooling air does not decrease. Even further, the flow rate of the cooling air is further increased under the action of the diversion sub-channel 310. As a result, a large amount of cooling air can flow to contact the high heat load component 400 (as Figure 5 shown, where the arrow represents the cooling air), and the cooling effect is good.

[0066] Among them, the number of the blocking members 300 can be two, three, four or more.

[0067] Furthermore, the air guiding cover 200 includes a first cover body 220 and a second cover body 230. The first cover body 220 and the second cover body 230 are connected by means of snap connection, screw connection or the like to form a diversion channel 210. In this way, the air guiding cover 200 is designed as a split structure, which facilitates the installation of the blocking members 300 in the diversion channel 210.

[0068] Specifically, the first cover body 220 is arranged relatively closer to the diversion side wall 113 than the second cover body 230, and the second cover body 230 is arranged relatively closer to the volute tongue 112 than the first cover body 220. Among them, when the diversion side wall 113 is arranged below the fan cover 110 and the volute tongue 112 is arranged above the fan cover 110, the first cover body 220 is correspondingly arranged below and the second cover body 230 is arranged above.

[0069] Moreover, at least one blocking member 300 is connected to the first cover body 220, and at least one blocking member 300 is connected to the second cover body 230. In this way, the cooling air entering the first cover body 220 and the cooling air entering the second cover body 230 can both be blocked and diverted by the corresponding blocking members 300. This can not only prevent the cooling air from flowing back into the air inlet channel 114 from the volute tongue 112, thereby avoiding the generation of whistling noise, but also guide the flow of the cooling air to ensure that the cooling air can smoothly flow to contact with high-heat-load components 400 such as the cylinder head or the cylinder block, improving the cooling effect.

[0070] In one embodiment, an engine assembly is further provided, including the air-cooling device of any of the above embodiments.

[0071] During the working process of the engine assembly of the above embodiment, no whistling noise will occur; moreover, high-heat-load components 400 such as the cylinder head or the cylinder block can be effectively cooled, reducing the heat load of the engine and improving the working performance.

[0072] In one embodiment, a vehicle is further provided, including the engine assembly of any of the above embodiments.

[0073] During the driving process of the vehicle of the above embodiment, no whistling noise will occur, and the driving experience is good; moreover, the engine will not overheat and has good heat dissipation performance.

[0074] It should be noted that the vehicle of the above embodiment can be a transportation tool such as a motorcycle or a scooter.

[0075] It should be noted that "a certain body" and "a certain part" can be a part of the corresponding "component", that is, "a certain body" and "a certain part" are integrally formed with "other parts of the component"; they can also be an independent component separable from "other parts of the component", that is, "a certain body" and "a certain part" can be manufactured independently and then combined with "other parts of the component" to form a whole. The expressions of "a certain body" and "a certain part" in this application are only one embodiment for the convenience of reading, rather than a limitation on the scope of protection of this application. As long as the above features are included and the functions are the same, it should be understood as an equivalent technical solution of this application.

[0076] It should be noted that the components included in the "unit", "component", "mechanism", and "device" of this application can also be flexibly combined, that is, modular production can be carried out according to actual needs to facilitate modular assembly. The division of the above components in this application is only one embodiment for the convenience of reading, rather than a limitation on the scope of protection of this application. As long as the above components are included and the functions are the same, it should be understood as an equivalent technical solution of this application.

[0077] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0078] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0079] In the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0080] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0081] It should be noted that when an element is referred to as being "fixed to", "arranged on", "secured to" or "mounted on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. Further, when an element is considered to be "fixed and drivingly connected" to another element, the two may be fixed in a detachable connection manner or a non-detachable connection manner, as long as power transmission can be achieved, such as socket connection, snap connection, integrally formed fixation, welding, etc., which can be achieved in the prior art and will not be elaborated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is perpendicular, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0082] It should also be understood that when interpreting the connection relationship or position relationship of elements, although not explicitly described, the connection relationship and position relationship are interpreted to include an error range, and this error range should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximately" or "substantially" may mean within one or more standard deviations, which will not be limited here.

[0083] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0084] The above embodiments only express several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An air-cooling device, characterized in that, Comprising: A fan, the fan includes a fan cover provided with an air outlet, a volute tongue and a guiding side wall are relatively and spacedly arranged at the air outlet of the fan cover, and the distance from the volute tongue to the blade is less than the distance from the guiding side wall to the blade; A wind guiding cover, the wind guiding cover is provided with a guiding channel, and the wind guiding cover is connected to the fan cover so that the guiding channel communicates with the air outlet; And A blocking member, the blocking member is arranged in the guiding channel and connected to the wind guiding cover, the blocking member is used for blocking the wind flowing out from the guiding side wall from flowing back towards the volute tongue, the projection of the blocking member at the air outlet is located between the volute tongue and the guiding side wall, and the included angle between the extending direction of the blocking member and the tangent of the guiding side wall is θ, wherein, 0° ≤ θ < 90°.

2. The air-cooling device according to claim 1, characterized in that, The fan is a centrifugal fan.

3. The air-cooling device according to claim 1, wherein The projection of the end of the blocking member far from the fan cover at the air outlet falls on the lowermost end of the volute tongue.

4. The air-cooling device according to claim 1, characterized in that, The end of the blocking member close to the fan cover is located at the connection part of the fan cover and the wind guiding cover.

5. The air-cooling device according to claim 1, wherein The blocking member is a blocking sheet or a blocking plate.

6. The air-cooling device according to claim 1, characterized in that, The blocking member is rotatably connected to the wind guiding cover to adjust the included angle between the extending direction of the blocking member and the tangent of the guiding side wall.

7. The air-cooling device according to any one of claims 1 to 6, characterized in that, There are at least two blocking members, at least two blocking members are spacedly arranged, and adjacent two blocking members form a guiding sub-channel.

8. The air-cooling device according to claim 7, wherein The wind guiding cover includes a first cover body and a second cover body, the first cover body and the second cover body are connected to form the guiding channel, the first cover body is arranged relatively close to the guiding side wall with respect to the second cover body, the second cover body is arranged relatively close to the volute tongue with respect to the first cover body, at least one blocking member is connected to the first cover body, and at least one blocking member is connected to the second cover body.

9. An engine assembly, characterized in that, Comprising the air cooling device according to any one of claims 1 to 8.

10. A vehicle, characterized in that, Comprising the engine assembly according to claim 9.

Images