A fan system and a road sweeper

Abstract

The embodiment of the application provides a fan system and a road sweeper, and relates to the technical field of sanitation sweepers. The road sweeper comprises a fan system, the fan system comprises a first fan module, a second fan module and a converging air outlet piece. The first fan module has a first air outlet channel, the second fan module has a second air outlet channel, the converging air outlet piece comprises a converging section and first and second air outlet channels arranged at an angle and connected in communication, one end of the first air outlet channel is connected with the first air outlet channel, the other end of the first air outlet channel is connected with the converging section, one end of the second air outlet channel is connected with the second air outlet channel, and the other end of the second air outlet channel is connected with the converging section. The cross-sectional dimension of the converging section is greater than the cross-sectional dimension of the first air outlet channel and the cross-sectional dimension of the second air outlet channel, and the converging air outlet piece can converge the first air outlet channel and the second air outlet channel and reduce the loss when air flows converge. While meeting the high-speed road sweeper's demand for large air volume, the space occupation of the fan system is compressed.

Description

Technical Field

[0001] This invention relates to the field of sanitation sweeper technology, and more specifically, to a blower system and a road sweeper. Background Technology

[0002] Conventional vacuum sweeper trucks are typically equipped with a single fan to provide negative pressure power for the suction system. They use one 250 mm diameter suction pipe or two 180 mm diameter suction pipes, requiring a relatively small total air volume. However, with increased operational efficiency, high-speed sweeper trucks (such as ZBH5189TSLDFE6 and ZBH5189TSLDFBEV) need to complete multiple suction operations (e.g., three times) in a single operation. These trucks are equipped with up to 65 suction pipes and multiple large-diameter main suction pipes (e.g., three Φ225 mm and two Φ180 mm), resulting in a total air volume requirement more than double that of conventional models, which a single fan cannot meet.

[0003] In existing high-speed suction sweeper trucks, to meet the demand for large air volumes, a common approach is to use a parallel configuration of two fans, one large and one small. Because the two fans have different specifications and inconsistent aerodynamic characteristics, they cannot share the same pneumatic transmission system. Each fan must be equipped with its own independent air inlet, exhaust outlet, and corresponding air duct. This design results in the entire vehicle's fan system being divided into two independent chambers, occupying a significant amount of space. Summary of the Invention

[0004] The present invention aims to provide a fan system and a road sweeper that can meet the demand for large air volume while reducing space occupation.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a fan system, comprising: The first fan module has a first exhaust duct; The second fan module is arranged opposite to the first fan module and has a second exhaust duct; The converging air outlet component includes a converging section and a first air outlet duct and a second air outlet duct arranged at an angle. One end of the first air outlet duct is connected to the first row of air ducts, and the other end of the first air outlet duct is connected to the converging section. One end of the second air outlet duct is connected to the second row of air ducts, and the other end of the second air outlet duct is connected to the converging section. The converging section is located at the other end of the first air outlet duct and the second air outlet duct. The cross-sectional dimensions of the confluence section are larger than those of the first and second air outlet ducts.

[0006] In an optional implementation, the orientation of the first air duct and the orientation of the second air duct are set at a first angle, the first angle being less than or equal to 30°.

[0007] In an optional embodiment, the first air outlet extends along the opening direction of the first exhaust air outlet, and the second air outlet extends along the opening direction of the second exhaust air outlet. And / or, the sidewalls where the first air outlet duct and the second air outlet duct intersect are connected by an arc transition and are set at a second included angle, and the included angles of the first included angle and the second included angle are the same.

[0008] In an optional implementation, the first fan module and the second fan module are arranged at a third angle, and the angle between the third angle and the first angle is the same.

[0009] In an optional implementation, the cross-sectional area of ​​the first exhaust duct gradually increases in the direction approaching the converging exhaust element; And / or, the cross-sectional area of ​​the second air duct gradually increases in the direction of the converging air outlet.

[0010] In an optional embodiment, the ratio of the cross-sectional area of ​​the outlet of the first exhaust duct to the cross-sectional area of ​​the inlet of the first exhaust duct is 1.8 to 2.4. And / or, the ratio of the cross-sectional area of ​​the outlet of the second air duct to the cross-sectional area of ​​the inlet of the second air duct is 1.8 to 2.4.

[0011] In an optional embodiment, the first air outlet is inclined downward, the second air outlet is inclined downward, and the bottom wall of the confluence section is arranged in a horizontal direction. And / or, the first air outlet is inclined downward, the second air outlet is inclined downward, and the confluence section is inclined downward.

[0012] In an optional embodiment, the first air outlet is set at a fourth angle to the horizontal plane, and the second air outlet is set at a fifth angle to the horizontal plane, wherein both the fourth and fifth angles are less than or equal to 5°.

[0013] In an optional implementation, the air outlet face of the confluence section is inclined upward.

[0014] In an optional embodiment, the first fan module further includes a first volute and a first air inlet duct connected to each other, and a first air outlet duct connected to the first volute; the second fan module further includes a second volute and a second air inlet duct connected to each other, and a second air outlet duct connected to the second volute. The first volute and the second volute are arranged opposite to each other. The first air inlet is located on the side of the first volute closer to the second volute, and the second air inlet is located on the side of the second volute closer to the first volute.

[0015] In an optional embodiment, the ratio of the cross-sectional area of ​​the first air inlet duct to the cross-sectional area of ​​the air inlet of the first volute is 1.8 to 2.4. And / or, the ratio of the cross-sectional area of ​​the second air inlet to the cross-sectional area of ​​the air inlet of the second volute is 1.8 to 2.4.

[0016] In an optional embodiment, the first volute has a first air inlet on the side near the second volute, and the first air inlet duct includes a first connecting duct and a second connecting duct that are connected at an angle and with a rounded transition, and the first connecting duct is connected to the first air inlet. And / or, the second volute has a second air inlet on the side near the first volute, and the second air inlet duct includes a third connecting duct and a fourth connecting duct that are connected at an angle and with a rounded transition, and the third connecting duct is connected to the second air inlet.

[0017] In an optional embodiment, the second connecting air duct includes a first enclosure plate, a second enclosure plate, a third enclosure plate, and a fourth enclosure plate connected end to end in sequence. The second enclosure plate and the fourth enclosure plate are arranged opposite to each other and are both perpendicular to the first enclosure plate. The third enclosure plate is opposite to the first enclosure plate and is parallel to the end face of the first volute. The fourth connecting air duct includes a fifth, sixth, seventh, and eighth enclosure plate connected end to end. The sixth and eighth enclosure plates are arranged opposite each other and are both perpendicular to the fifth enclosure plate. The seventh enclosure plate is opposite to the fifth enclosure plate and parallel to the end face of the second volute. The fifth enclosure plate abuts against the first enclosure plate.

[0018] In an optional implementation, the length of the first exhaust duct is L1, and the length of the first outlet duct is L2, where L1:L2 = 1:3 to 1:5; And / or, the length of the second air duct is L3, and the length of the second air outlet duct is L4, where L3:L4 = 1:3~1:5.

[0019] Secondly, the present invention provides a road sweeper vehicle, including a fan system according to any of the foregoing embodiments.

[0020] The beneficial effects provided by the embodiments of the present invention include: The embodiments of the present invention provide a fan system and a road sweeper. The road sweeper includes a fan system, which includes a first fan module, a second fan module, and a converging air outlet component. The first fan module has a first exhaust duct, and the second fan module is disposed opposite to the first fan module and has a second exhaust duct. The converging air outlet component includes a connected converging section and a first exhaust duct and a second exhaust duct disposed at an angle. One end of the first exhaust duct is connected to the first exhaust duct, and the other end of the first exhaust duct is connected to the converging section. One end of the second exhaust duct is connected to the second exhaust duct, and the other end of the second exhaust duct is connected to the converging section. The cross-sectional dimension of the converging section is larger than the cross-sectional dimensions of both the first and second exhaust ducts. The converging air outlet component can merge the first exhaust duct of the first fan module and the second exhaust duct of the second fan module, reducing airflow loss during convergence. This can meet the high airflow requirements of a high-speed road sweeper while reducing the space occupied by the fan system. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the wind turbine system from a first-view perspective, provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the wind turbine system from a second perspective, provided in an embodiment of the present invention. Figure 3 This is a structural schematic diagram of the wind turbine system from a third-view perspective, provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the assembly of the air outlet component with the first and second exhaust ducts provided in an embodiment of the present invention.

[0023] Icons: 1-Fan system; 100-First fan module; 110-First volute; 120-First exhaust duct; 130-First inlet duct; 131-First connecting duct; 132-Second connecting duct; 1321-First enclosure; 1322-Second enclosure; 1323-Third enclosure; 1324-Fourth enclosure; 200-Second fan module; 210-Second volute; 220-Second exhaust duct; 230-Second inlet duct; 231-Third connecting duct; 232-Fourth connecting duct; 2321-Fifth enclosure; 2322-Sixth enclosure; 2323-Seventh enclosure; 2324-Eighth enclosure; 300-Converging air outlet component; 310-First air outlet duct; 320-Second air outlet duct; 330-Converging section; 331-Air outlet end face. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0028] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0030] The following describes in detail, with reference to the accompanying drawings, the specific structure of a fan system provided by an embodiment of the present invention and the corresponding technical effects it brings.

[0031] Please refer to Figures 1-4 The present invention provides a fan system 1 including a first fan module 100, a second fan module 200 and a converging air outlet component 300.

[0032] The first fan module 100 has a first exhaust duct 120. The second fan module 200 is disposed opposite to the first fan module 100 and has a second exhaust duct 220. The converging air outlet component 300 includes a converging section 330 and a first air outlet duct 310 and a second air outlet duct 320 disposed at an angle. One end of the first air outlet duct 310 is connected to the first exhaust duct 120, and the other end of the first air outlet duct 310 is connected to the converging section 330. One end of the second air outlet duct 320 is connected to the second exhaust duct 220, and the other end of the second air outlet duct 320 is connected to the converging section 330. The converging section 330 is located at the other end of the first air outlet duct 310 and the second air outlet duct 320. The cross-sectional dimensions of the converging section 330 are larger than the cross-sectional dimensions of the first air outlet duct 310 and the second air outlet duct 320.

[0033] In this embodiment, the first fan module 100 and the second fan module 200 are fans of the same specifications. The first exhaust duct 120 of the first fan module 100 and the second exhaust duct 220 of the second fan module 200 can be combined via the converging exhaust component 300. This satisfies the high air volume requirements of the high-speed sweeper while minimizing the space occupied by the fan system 1.

[0034] The airflow from the first exhaust duct 120 enters the first outlet duct 310 and flows along its extension direction. Similarly, the airflow from the second exhaust duct 220 enters the second outlet duct 320 and flows along its extension direction. Because the first and second outlet ducts 310 and 320 are set at an angle, the two airflows form a convergence area at a certain angle within the converging outlet component 300. The converging section 330 downstream of this converging area has a larger cross-sectional size, allowing the airflow velocity to naturally decrease and the static pressure to stabilize upon entering the converging section 330. This effectively mitigates turbulence, vortices, and increased local resistance caused by abrupt changes in airflow direction and velocity superposition. This achieves efficient fusion of two independent air sources, ensures linear superposition of total airflow, and avoids the volume redundancy and efficiency loss associated with traditional large-angle bend exhaust ducts or dual-cavity isolation structures.

[0035] Specifically, in this embodiment, the orientation of the first air duct 120 and the orientation of the second air duct 220 are set at a first angle, which is less than or equal to 30°. This arrangement allows airflow to smoothly enter the angled first air outlet duct 310 and the second air outlet duct 320 respectively, and continue flowing forward along their respective outlets, ultimately converging in the larger common converging section 330. Furthermore, it reduces the space occupied by the first fan module 100 and the second fan module 200 in the width direction.

[0036] The first air outlet duct 310 extends along the opening direction of the first row of air ducts 120, and the second air outlet duct 320 extends along the opening direction of the second row of air ducts 220. That is to say, after the airflow is discharged from the first fan module 100, it can enter the first air outlet duct 310 without undergoing a significant directional change and continue to flow toward the confluence section 330. Similarly, the second air outlet duct 320 extends along the opening direction of the second row of air ducts 220, so that the airflow discharged from the second fan module 200 also merges into the confluence air outlet component 300 with the minimum deflection angle. The convergence angle of the two airflows in the confluence air outlet component 300 is small. Combined with the design that the cross-sectional size of the confluence section 330 is larger than the cross-sectional size of each air outlet, it can effectively reduce the probability of sudden flow velocity changes and vortex generation, and alleviate airflow impact and pressure loss.

[0037] Optionally, the sidewalls of the first air outlet duct 310 and the second air outlet duct 320 are connected by an arc transition and are set at a second included angle. The included angles of the first included angle and the second included angle are the same. This setting can reduce the turbulence when the gas merges after passing through the first exhaust duct 120 and the second exhaust duct 220, so that the airflow merges smoothly, reducing the resistance when merging, thereby improving the exhaust capacity. In addition, it can also reduce the phenomenon of stress concentration at the connection between the inner walls of the first exhaust duct 120 and the inner walls of the second exhaust duct 220.

[0038] Optionally, the cross-sectional area of ​​the first air duct 120 gradually increases in the direction close to the converging air outlet 300, and the cross-sectional area of ​​the second air duct 220 gradually increases in the direction close to the converging air outlet 300.

[0039] For example, the ratio of the cross-sectional area of ​​the outlet of the first air duct 120 to the cross-sectional area of ​​the inlet of the first air duct 120 is 1.8 to 2.4, and the ratio of the cross-sectional area of ​​the outlet of the second air duct 220 to the cross-sectional area of ​​the inlet of the second air duct 220 is 1.8 to 2.4.

[0040] Understandably, setting the first exhaust duct 120 and the second exhaust duct 220 to a gradually expanding cross-section design in the terminal region of the airflow direction can allow the two high-speed airflows from the first fan module 100 and the second fan module 200 to undergo a controllable deceleration and diffusion process before entering the converging exhaust component 300, thereby reducing turbulence and vortices caused by sudden changes in airflow kinetic energy and alleviating airflow interference problems caused by parallel exhaust of multiple fans.

[0041] The ratio of the cross-sectional area of ​​the duct outlet to the cross-sectional area of ​​the duct inlet should be between 1.8 and 2.4 to avoid an excessively small expansion ratio, which would result in insufficient noise reduction and deceleration. This also ensures that the expansion ratio is not too large, which could lead to an overly steep flow path, creating airflow vortex zones and causing vibration.

[0042] Of course, in some other embodiments, the cross-sectional area of ​​the first exhaust duct 120 can remain unchanged in the length direction, and the cross-sectional area of ​​the second exhaust duct 220 can also remain unchanged in the length direction.

[0043] The first fan module and the second fan module are positioned at a third angle, the same as the first angle. In other words, in this embodiment, the first fan module 100 is positioned at the same location as the opening of the first exhaust duct 120, and the second fan module 200 is positioned at the same location as the opening of the second exhaust duct 220. This reduces airflow loss and exhaust resistance.

[0044] Optionally, in this embodiment, the first air outlet 310 is inclined downward, the second air outlet 320 is inclined downward, and the bottom wall of the confluence section 330 is arranged in the horizontal direction.

[0045] Understandably, the airflow turns horizontal after passing downwards through the inclined first air outlet 310, the second air outlet 320, and the horizontally arranged confluence section 330. Furthermore, in this embodiment, the air outlet end face 331 of the confluence section 330 is inclined upwards to facilitate the connection of the confluence section 330 with other systems of the sweeper.

[0046] It should be noted that the air outlet face 331 of the confluence section 330 can be understood as the end face of the end from which gas is discharged from the confluence section 330.

[0047] Optionally, in some embodiments, the first air outlet 310 is inclined downward, the second air outlet 320 is inclined downward, and the confluence section 330 is also inclined downward.

[0048] The first air outlet 310 is set at a fourth angle to the horizontal plane, and the second air outlet 320 is set at a fifth angle to the horizontal plane. Both the fourth and fifth angles are α, and α is less than or equal to 5°. The second air outlet 320 is set at an angle downward. The angle between the line connecting the end of the confluence section 330 away from the second air outlet 320 and the end of the second air outlet 320 near the second exhaust duct 220 and the horizontal plane is α, and α is less than or equal to 5°.

[0049] It should be noted that the downward tilt in this embodiment can be understood as the fan system 1 being applied to the sweeper vehicle in a tilted posture towards the ground. It can also be understood as... Figure 3 The posture used as a reference.

[0050] By arranging the first air outlet 310 and the second air outlet 320 at an angle downwards, the airflow output from the first exhaust duct 120 and the second exhaust duct 220 can be guided smoothly into the shared confluence section 330 in a nearly horizontal and low-disturbance manner through a gently sloping guide structure with a very small inclination angle, thereby taking into account space compactness, airflow continuity and system pressure loss control.

[0051] Furthermore, as described above, the first air outlet 310 and the second air outlet 320 converge into the merging air outlet component 300 at an angle of less than or equal to 30°. The two airflows meet and superimpose within the merging section 330. Since the downward tilt angles of the first air outlet 310 and the second air outlet 320 are both extremely small (≤5°), the mainstream airflow direction remains highly horizontal. Therefore, when they converge within the merging air outlet component 300, the velocity direction difference is small and the momentum matching degree is high, which is conducive to forming a stable and uniform composite jet and reducing turbulent kinetic energy consumption and pressure pulsation. In this embodiment, the cross-sectional dimension of the merging section 330 is larger than the cross-sectional dimensions of the first air outlet 310 and the second air outlet 320, further providing a gradually expanding buffer space for the composite airflow, so that the flow velocity is moderately reduced and the static pressure is slightly restored, forming an overall low-resistance, low-noise terminal confluence structure. This allows the first fan module 100 and the second fan module 200 to operate more smoothly.

[0052] Furthermore, the bottom wall of the confluence section 330 is arranged horizontally, with the angle between the first air outlet 310 and the horizontal plane being less than or equal to 5°, and the angle between the second air outlet 320 and the horizontal plane being less than or equal to 5°. This further reduces the disturbance of the airflow from the first air outlet 310 and the second air outlet 320, allowing the airflow in the first air outlet 310 and the second air outlet 320 to merge smoothly.

[0053] Specifically, in this embodiment, the first fan module 100 further includes a first volute 110 and a first air inlet duct 130 connected together, and a first exhaust duct 120 connected to the first volute 110. The second fan module 200 further includes a second volute 210 and a second air inlet duct 230 connected together, and a second exhaust duct 220 connected to the second volute 210. The first volute 110 and the second volute 210 are arranged opposite to each other. The first air inlet duct 130 is located on the side of the first volute 110 closer to the second volute 210, and the second air inlet duct 230 is located on the side of the second volute 210 closer to the first volute 110.

[0054] With the above settings, it can be ensured that the first air inlet duct 130 of the first fan module 100 and the second air inlet duct 230 of the second fan module 200 will not occupy too much space on both sides of the first fan module 100 and the second fan module 200, so that the overall size of the fan system 1 is relatively compact.

[0055] Specifically, the first volute 110 has a first air inlet on the side near the second volute 210. The first air inlet duct 130 includes a first connecting duct 131 and a second connecting duct 132 that are connected at an angle and with a rounded transition. This arrangement allows the gas in the first air inlet duct 130 to flow relatively smoothly within the first air inlet duct 130, avoiding excessive disturbance in the airflow during the reversal process. The first connecting duct 131 is connected to the first air inlet.

[0056] The second volute 210 has a second air inlet on the side near the first volute 110. The second air inlet duct 230 includes a third connecting duct 231 and a fourth connecting duct 232 that are connected at an angle and with a rounded transition. The third connecting duct 231 is connected to the second air inlet. Similarly, this allows the gas in the second air inlet duct 230 to flow relatively smoothly within the second air inlet duct 230.

[0057] Optionally, in some embodiments, the ratio of the cross-sectional area of ​​the first air inlet 130 to the cross-sectional area of ​​the air inlet of the first volute 110 is 1.8 to 2.4, and the ratio of the cross-sectional area of ​​the second air inlet 230 to the cross-sectional area of ​​the air inlet of the second volute 210 is 1.8 to 2.4.

[0058] In this embodiment, the cross-sectional area of ​​the first air inlet 130 is set to be 1.8 to 2.4 times the cross-sectional area of ​​the air inlet of the first volute 110. This is equivalent to pre-setting a buffer section upstream of the air inlet of the volute. When the airflow enters the narrower air inlet of the first volute 110 from the relatively wide first air inlet 130, the upstream cross-section is large enough, and the overall velocity gradient is significantly smoothed, allowing the airflow to adhere more smoothly to the inner wall of the volute and be guided towards the impeller. Similarly, the second air inlet 230 and the air inlet of the second volute 210 also maintain the same area ratio, ensuring that the aerodynamic behavior of the dual-channel air intake is symmetrical and predictable.

[0059] Specifically, the second connecting air duct 132 includes a first enclosure 1321, a second enclosure 1322, a third enclosure 1323, and a fourth enclosure 1324 connected end to end in sequence. The second enclosure 1322 and the fourth enclosure 1324 are arranged opposite to each other and are both perpendicular to the first enclosure 1321. This means that the second connecting air duct 132 forms a pair of parallel sidewalls in the direction perpendicular to the first enclosure 1321, thereby constraining the airflow to flow stably along a specific cross section. The third enclosure 1323 is opposite to the first enclosure 1321 and is parallel to the end face of the first volute 110, forming a second connecting air duct 132 with a trapezoidal cross section.

[0060] Similarly, in this embodiment, the fourth connecting air duct 232 includes a fifth enclosure 2321, a sixth enclosure 2322, a seventh enclosure 2323, and an eighth enclosure 2324 connected end to end. The sixth enclosure 2322 and the eighth enclosure 2324 are arranged opposite to each other and are both perpendicular to the fifth enclosure 2321. The seventh enclosure 2323 is opposite to the fifth enclosure 2321 and is parallel to the end face of the second volute 210, forming a fourth connecting air duct 232 with a trapezoidal cross-section.

[0061] The fifth enclosure 2321 abuts against the first enclosure 1321. Under the premise that the first fan module 100 and the second fan module 200 are arranged side by side, the precise cooperation between the first enclosure 1321 and the fifth enclosure 2321 merges and converges the two air intake paths that originally needed to extend independently in space. This makes the first air intake duct 130 and the second air intake duct 230 form a compact layout that is adjacent but does not interfere with each other in the area near the air intake of the volute, thereby significantly reducing the lateral dimension of the fan system arranged in the first fan module 100 and the second fan module 200.

[0062] Understandably, in this embodiment, the trapezoidal cross-section of the fourth connecting duct 232 and the trapezoidal cross-section of the second connecting duct 132 can form a tapering duct. This creates a reasonable contraction angle. When the fourth connecting duct 232 and the second connecting duct 132 are variable-diameter ducts, compared to connecting ducts with rectangular cross-sections, it can effectively reduce gas turbulence within the ducts. In other words, it can reduce the occurrence of airflow paths without abrupt changes through the second connecting duct 132 or the fourth connecting duct 232, thereby reducing eddies and local resistance.

[0063] Please refer to Figure 4 Optionally, the length of the first air duct 120 is L1, and the length of the first air outlet duct 310 is L2, with L1:L2 = 1:3 to 1:5. The length of the second air duct 220 is L3, and the length of the second air outlet duct 320 is L4, with L3:L4 = 1:3 to 1:5.

[0064] Therefore, the dimensions of the first air outlet duct 310 and the second air outlet duct 320 are relatively long, which can make the airflow discharged from the first air outlet duct 120 relatively balanced and the airflow relatively stable after entering the first air outlet duct 310. Similarly, it can also make the airflow discharged from the second air outlet duct 220 relatively balanced and the airflow relatively stable after entering the second air outlet duct 320.

[0065] It can also allow the airflow from the first air outlet 310 and the airflow from the second air outlet 320 to mix smoothly, and prevent backflow and deflection, thereby reducing the resistance when the two airflows merge.

[0066] Optionally, L1:L2 can be 1:3, and L3:L4 can also be 1:3.

[0067] This invention also provides a road sweeper, which includes the aforementioned fan system 1. Therefore, the road sweeper also has the same technical effects as the fan system 1, so the technical effects of the road sweeper will not be described again here.

[0068] In summary, this invention provides a fan system 1 and a road sweeper. The road sweeper includes the fan system 1, which includes a first fan module 100, a second fan module 200, and a converging air outlet component 300. The first fan module 100 has a first exhaust duct 120, and the second fan module 200 is disposed opposite to the first fan module 100 and has a second exhaust duct 220. The converging air outlet component 300 includes a converging section 330 that is connected to each other and a first air outlet duct 310 and a second air outlet duct 320 that are disposed at an angle. One end of the first air outlet duct 310 is connected to the first exhaust duct 120, and the other end of the first air outlet duct 310 is connected to the converging section 330. One end of the second air outlet duct 320 is connected to the second exhaust duct 220, and the other end of the second air outlet duct 320 is connected to the converging section 330. The cross-sectional dimensions of the converging section 330 are larger than those of the first air outlet duct 310 and the second air outlet duct 320. The converging air outlet component 300 can merge the first air duct 120 of the first fan module 100 and the second air duct 220 of the second fan module 200, reducing airflow loss during convergence. This allows for meeting the high air volume requirements of the high-speed sweeper while minimizing the space occupied by the fan system 1.

[0069] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A fan system, characterized in that, include: A first fan module (100) has a first exhaust duct (120). The second fan module (200) is disposed opposite to the first fan module (100) and has a second exhaust duct (220). A converging air outlet component (300) includes a first air outlet duct, a second air outlet duct, and a converging section. The first air outlet duct (310) and the second air outlet duct (320) are arranged at an angle. The converging section has a converging segment. One end of the first air outlet duct (310) is connected to the first exhaust duct (120), and the other end of the first air outlet duct (310) is connected to the converging section. One end of the second air outlet duct (320) is connected to the second exhaust duct (220), and the other end of the second air outlet duct (320) is connected to the converging section. The cross-sectional dimensions of the confluence section (330) are larger than those of the first air outlet duct (310) and the second air outlet duct (320).

2. The fan system according to claim 1, characterized in that: The orientation of the first exhaust duct (120) is set at a first angle with the orientation of the second exhaust duct (220), and the first angle is less than or equal to 30°.

3. The fan system according to claim 2, characterized in that: The first air outlet duct (310) extends along the opening direction of the first exhaust duct (120), and the second air outlet duct (320) extends along the opening direction of the second exhaust duct (220); And / or, the sidewalls of the first air outlet duct (310) and the second air outlet duct (320) are connected by an arc transition and are set at a second included angle, and the included angle of the first included angle and the included angle of the second included angle are the same.

4. The fan system according to claim 2, characterized in that: The first fan module (100) and the second fan module (200) are set at a third angle, and the third angle is the same as the angle between the first angle and the second angle.

5. The fan system according to claim 1, characterized in that: The cross-sectional area of ​​the first exhaust duct (120) gradually increases in the direction close to the converging exhaust element (300); And / or, the cross-sectional area of ​​the second exhaust duct (220) gradually increases in the direction of approaching the converging exhaust element (300).

6. The fan system according to claim 5, characterized in that: The ratio of the cross-sectional area of ​​the outlet of the first exhaust duct (120) to the cross-sectional area of ​​the inlet of the first exhaust duct (120) is 1.8 to 2.4; And / or, the ratio of the cross-sectional area of ​​the outlet of the second exhaust duct (220) to the cross-sectional area of ​​the inlet of the second exhaust duct (220) is 1.8 to 2.

4.

7. The fan system according to claim 1, characterized in that: The first air outlet duct (310) is inclined downward, the second air outlet duct (320) is inclined downward, and the bottom wall of the converging section (330) is arranged in the horizontal direction; And / or, the first air outlet duct (310) is inclined downward, the second air outlet duct (320) is inclined downward, and the confluence section (330) is inclined downward.

8. The fan system according to claim 7, characterized in that: The first air outlet duct (310) is set at a fourth angle to the horizontal plane, and the second air outlet duct (320) is set at a fifth angle to the horizontal plane, wherein the fourth angle and the fifth angle are both less than or equal to 5°.

9. The fan system according to claim 7, characterized in that: The air outlet end face (331) of the confluence section (330) is inclined upward.

10. The fan system according to claim 1, characterized in that: The first fan module (100) further includes a first volute (110) and a first air inlet duct (130) connected together, and the first exhaust duct (120) is connected to the first volute (110). The second fan module (200) further includes a second volute (210) and a second air inlet duct (230) connected together, and the second exhaust duct (220) is connected to the second volute (210). The first volute (110) and the second volute (210) are arranged opposite to each other. The first air inlet (130) is located on the side of the first volute (110) closer to the second volute (210), and the second air inlet (230) is located on the side of the second volute (210) closer to the first volute (110).

11. The fan system according to claim 10, characterized in that: The ratio of the cross-sectional area of ​​the first air inlet duct (130) to the cross-sectional area of ​​the air inlet of the first volute (110) is 1.8 to 2.4; And / or, the ratio of the cross-sectional area of ​​the second air inlet (230) to the cross-sectional area of ​​the air inlet of the second volute (210) is 1.8 to 2.

4.

12. The fan system according to claim 10, characterized in that: The first volute (110) has a first air inlet on the side near the second volute (210). The first air inlet duct (130) includes a first connecting duct (131) and a second connecting duct (132) that are connected at an angle and with a rounded transition. The first connecting duct (131) is connected to the first air inlet. And / or, the second volute (210) has a second air inlet on the side near the first volute (110), and the second air inlet duct (230) includes a third connecting duct (231) and a fourth connecting duct (232) that are connected at an angle and with a rounded transition, the third connecting duct (231) being connected to the second air inlet.

13. The fan system according to claim 12, characterized in that: The second connecting air duct (132) includes a first enclosure plate (1321), a second enclosure plate (1322), a third enclosure plate (1323), and a fourth enclosure plate (1324) connected end to end in sequence. The second enclosure plate (1322) and the fourth enclosure plate (1324) are arranged opposite to each other and are both perpendicular to the first enclosure plate (1321). The third enclosure plate (1323) is opposite to the first enclosure plate (1321) and parallel to the end face of the first volute (110). The fourth connecting air duct (232) includes a fifth enclosure plate (2321), a sixth enclosure plate (2322), a seventh enclosure plate (2323), and an eighth enclosure plate (2324) connected end to end. The sixth enclosure plate (2322) and the eighth enclosure plate (2324) are arranged opposite to each other and are both perpendicular to the fifth enclosure plate (2321). The seventh enclosure plate (2323) is opposite to the fifth enclosure plate (2321) and parallel to the end face of the second volute (210). The fifth enclosure plate (2321) abuts against the first enclosure plate (1321).

14. The fan system according to claim 1, characterized in that: The length of the first exhaust duct (120) is L1, and the length of the first outlet duct (310) is L2, wherein L1:L2 = 1:3~1:5; And / or, the length of the second exhaust duct (220) is L3, and the length of the second outlet duct (320) is L4, wherein L3:L4 = 1:3 to 1:

5.

15. A road sweeper, characterized in that, Includes the wind turbine system as described in any one of claims 1-14.

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