Cooling system of washing and sweeping vehicle

Abstract

The utility model discloses a washing and sweeping vehicle cooling system which comprises an electric drive system cooling branch, a loading system cooling branch and a cooling assembly, the electric drive system cooling branch is communicated with an electric drive system of a washing and sweeping vehicle and cools the electric drive system, and the loading system cooling branch is communicated with a loading system of the washing and sweeping vehicle and cools the loading system. The loading system cooling branch is communicated with the electric drive system cooling branch through the control valve assembly, the cooling assembly comprises a radiator and a fan, and the cooling assembly is arranged on the electric drive system cooling branch. According to the washing and sweeping vehicle cooling system, the electric drive system and the loading system share one set of cooling assembly, it can be guaranteed that the washing and sweeping vehicle cannot be overheated to a loading workshop during road test driving, an additional loading system cooling device does not need to be additionally arranged, the whole vehicle weight and the manufacturing cost can be reduced, and the service life of the washing and sweeping vehicle is prolonged. And meanwhile, the heat dissipation requirements of an electric drive system and a loading system can be met, and energy consumption can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of cooling technology, and more specifically, to a cooling system for a sweeper truck. Background Technology

[0002] Currently, the electric drive system and the superstructure system of sweeper trucks are usually not installed in the same workshop or industrial park. Generally, the electric drive system needs to be installed on the production line first, and then the truck is driven to the superstructure workshop to install the superstructure system.

[0003] To ensure the vehicle can run normally without affecting its refueling performance, the electric drive system and the superstructure system typically use independent cooling modules, such as... Figure 1 As shown, the electric drive system includes a drive motor 120, a drive motor controller 130, and an auxiliary drive 110. The electric drive system uses a separate cooling assembly 410, which is connected in series with the drive motor 120, drive motor controller 130, and auxiliary drive 110 via an electric drive system cooling branch 100. An electric drive cooling water pump 140 is installed on the electric drive system cooling branch 100. The superstructure system includes a high-pressure water pump motor 221, a low-pressure water pump motor 211, a water pump controller 223, a fan motor 231, and a fan motor controller 232, as shown. Figures 2-3 As shown, the high-pressure water pump motor 221, low-pressure water pump motor 211, and water pump controller 223 share a common cooling assembly 410, with a first cooling water pump 241 installed on this cooling branch; the fan motor 231 and fan motor controller 232 use a single cooling assembly 410, with a second cooling water pump 242 installed on this cooling branch, for a total of three cooling assemblies 410 and three cooling modules. After the electric drive cooling system and the electric drive system are installed and filled in the same production workshop, the vehicle is then driven to the superstructure workshop, where the superstructure and corresponding cooling system are installed and the superstructure cooling system is filled.

[0004] While the independent cooling solution solves the problem of the vehicle overheating during driving to the superstructure workshop, the use of an independent cooling system for the superstructure system adds two cooling modules, affecting the layout space, increasing system cost and weight, and also affecting energy consumption.

[0005] Therefore, how to reduce the overall vehicle weight and manufacturing cost while ensuring cooling performance has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a cooling system for a sweeper truck to reduce the overall vehicle weight and manufacturing cost while ensuring cooling effect.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A cooling system for a sweeper truck, comprising:

[0009] The electric drive system cooling branch is connected to the electric drive system of the sweeper truck and is used to cool the electric drive system.

[0010] The upper structure system cooling branch is connected to the upper structure system of the sweeper truck to cool the upper structure system. The upper structure system cooling branch is connected to the electric drive system cooling branch through the control valve assembly.

[0011] The cooling assembly includes a heat sink and a fan, and is located on the cooling branch of the electric drive system.

[0012] Optionally, in the above-mentioned sweeper cooling system, the electric drive system cooling branch is connected to the first filling port, and an electric drive system cooling water pump is installed on the electric drive system cooling branch, which is located downstream of the first filling port.

[0013] Optionally, in the above-mentioned sweeper truck cooling system, the electric drive system includes a drive motor, a drive motor controller, and an auxiliary drive, and the auxiliary drive, drive motor, drive motor controller, and cooling components are connected in sequence through the electric drive system cooling branch.

[0014] Optionally, in the above-mentioned sweeper truck cooling system, the upper structure system cooling branch includes a first cooling main pipe, a second cooling main pipe, a first cooling branch, a second cooling branch, and a third cooling branch, wherein the first cooling branch, the second cooling branch, and the third cooling branch are connected in parallel.

[0015] The first cooling main pipe is connected to the cooling branch of the electric drive system and the inlet of the first cooling branch, the inlet of the second cooling branch and the inlet of the third cooling branch, respectively. The second cooling main pipe is connected to the outlet of the first cooling branch, the outlet of the second cooling branch, the outlet of the third cooling branch and the cooling branch of the electric drive system, respectively.

[0016] Optionally, in the above-mentioned sweeper truck cooling system, the superstructure system includes a low-pressure water pump motor, a low-pressure water pump motor controller, a high-pressure water pump motor, a high-pressure water pump controller, a fan motor, and a fan motor controller.

[0017] The first cooling branch is equipped with a low-pressure water pump motor and a low-pressure water pump motor controller; the second cooling branch is equipped with a high-pressure water pump motor and a high-pressure water pump controller; and the third cooling branch is equipped with a fan motor and a fan motor controller.

[0018] The inlet of the second cooling branch and the inlet of the third cooling branch merge to form an inlet merging point; the outlet of the second cooling branch and the outlet of the third cooling branch merge to form an outlet merging point.

[0019] The first cooling main pipe connects to the inlet and inlet junction of the electric drive system cooling branch and the first cooling branch, respectively. The second cooling main pipe connects to the outlet, outlet junction of the first cooling branch and the electric drive system cooling branch, respectively.

[0020] Optionally, in the above-mentioned sweeper truck cooling system, the first cooling main pipe is connected to the second filling port, and the first cooling main pipe is equipped with an upper structure system cooling water pump, which is located downstream of the second filling port.

[0021] Optionally, in the above-mentioned sweeper truck cooling system, the control valve assembly includes a first control valve and a second control valve. The first control valve includes a first three-way valve, and the first cooling main pipe is connected to the cooling branch of the electric drive system through the first control valve.

[0022] The second cooling main pipe is connected to the cooling branch of the electric drive system via the second control valve.

[0023] Optionally, in the above-mentioned sweeper truck cooling system, the second control valve includes a second three-way valve, and the second cooling main pipe is connected to the cooling branch of the electric drive system through the second three-way valve; or,

[0024] The second control valve includes a two-way valve. The cooling branch of the electric drive system is connected to the second cooling main pipe through a three-way valve. The second control valve is located on the second cooling main pipe.

[0025] Optionally, in the above-mentioned sweeper truck cooling system, the first cooling main pipe is connected to the inlet of the first cooling branch and the inlet junction point through a third three-way valve.

[0026] Optionally, in the above-mentioned sweeper cooling system, when the sweeper is in the first working mode, the electric drive system cooling branch is connected to the first cooling branch, and both the electric drive system cooling water pump and the superstructure system cooling water pump are running.

[0027] When the sweeper is in the second working mode, the electric drive system cooling branch is connected to the second cooling branch and the third cooling branch, and both the electric drive system cooling water pump and the superstructure system cooling water pump are running.

[0028] When the sweeper is in the third working mode, the cooling branch of the electric drive system is not connected to the cooling branch of the superstructure system, and the cooling water pump of the electric drive system is running.

[0029] The sweeper truck cooling system disclosed in this utility model shares a cooling component between the electric drive system and the superstructure system. This cooling component is located on the cooling branch of the electric drive system. When the superstructure system requires cooling, the cooling branch of the electric drive system is connected to the cooling branch of the superstructure system, allowing simultaneous cooling of both systems. When the superstructure system is not in operation, the connection between the electric drive system cooling branch and the superstructure system cooling branch is disconnected, and the cooling component only cools the electric drive system. Sharing a single cooling component between the electric drive system and the superstructure system ensures that the sweeper truck will not overheat during road testing before reaching the superstructure workshop, eliminating the need for an additional superstructure system cooling device. This reduces the overall vehicle weight and manufacturing cost while simultaneously meeting the heat dissipation requirements of both the electric drive system and the superstructure system, thus reducing energy consumption. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the cooling module of the electric drive system of a sweeper truck in the prior art;

[0032] Figure 2 This is a schematic diagram of the high-pressure water pump motor and the low-pressure water pump motor cooling module of the existing sweeper vehicle's mounting system;

[0033] Figure 3 This is a schematic diagram of the blower motor and blower motor controller cooling module of the existing sweeper truck mounting system;

[0034] Figure 4 This is a schematic diagram of the cooling system of the sweeper truck disclosed in an embodiment of this utility model.

[0035] Among them, 100 is the cooling branch of the electric drive system, 110 is the auxiliary drive, 120 is the drive motor, 130 is the drive motor controller, 140 is the cooling water pump of the electric drive system, 150 is the first filling port, and 160 is the temperature sensor.

[0036] 200 is the cooling branch of the superstructure system, 210 is the first cooling branch, 211 is the low-pressure water pump motor, 212 is the low-pressure water pump motor controller, 220 is the second cooling branch, 221 is the high-pressure water pump motor, 222 is the high-pressure water pump motor controller, 223 is the water pump controller, 230 is the third cooling branch, 231 is the fan motor, 232 is the fan motor controller, 240 is the cooling water pump of the superstructure system, 241 is the first cooling water pump, 242 is the second cooling water pump, 250 is the second filling port, 260 is the first cooling main pipe, 270 is the second cooling main pipe, and 280 is the third three-way valve;

[0037] 300 is a control valve assembly, 310 is a first control valve, and 320 is a second control valve;

[0038] 400 is the cooling component, 410 is the heatsink, and 420 is the fan. Detailed Implementation

[0039] The core of this utility model lies in disclosing a cooling system for a sweeper truck, which reduces the overall vehicle weight and manufacturing cost while ensuring cooling effect.

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] like Figure 1 As shown in the figure, this utility model embodiment discloses a sweeper truck cooling system, including an electric drive system cooling branch 100, an upper structure system cooling branch 200, and a cooling component 400.

[0042] Specifically, the electric drive system cooling branch 100 is connected to the electric drive system of the sweeper truck to cool the electric drive system, and the superstructure system cooling branch 200 is connected to the superstructure system of the sweeper truck to cool the superstructure system. The superstructure system cooling branch 200 is connected to the electric drive system cooling branch 100 through the control valve assembly 300. The cooling assembly 400 includes a radiator 410 and a fan 420. The cooling assembly 400 is installed on the electric drive system cooling branch 100. The cooling medium flows through the radiator 410 and is cooled by the forced convection of the fan 420.

[0043] It should be noted that the various devices in the electric drive system can be connected in series via the electric drive system cooling branch 100, or they can be connected in parallel, as long as the cooling component 400 can cool the various devices in the electric drive system. Specifically, the electric drive system includes a drive motor 120, a drive motor controller 130, and an auxiliary drive 110. These three components can be connected in series with the cooling component 400, or the cooling component 400 can be connected in parallel with the drive motor 120, the drive motor controller 130, and the auxiliary drive 110, respectively. Both of these methods are within the protection scope of this utility model embodiment.

[0044] The cooling system for sweeper trucks disclosed in this utility model embodiment is not limited to sweeper trucks, but can also be applied to cleaning trucks and garbage compactors, etc.

[0045] The sweeper-washer cooling system disclosed in this embodiment of the utility model uses a shared cooling component 400 for both the electric drive system and the superstructure system. The cooling component 400 is mounted on the electric drive system cooling branch 100. When the superstructure system requires cooling, the electric drive system cooling branch 100 is connected to the superstructure system cooling branch 200, allowing simultaneous cooling of both systems. When the superstructure system is not in operation, the connection between the electric drive system cooling branch 100 and the superstructure system cooling branch 200 is disconnected, and the cooling component 400 only cools the electric drive system. Sharing a single cooling component 400 for both the electric drive system and the superstructure system ensures that the sweeper-washer will not overheat during road testing before reaching the superstructure workshop, eliminating the need for an additional superstructure system cooling device. This reduces the overall vehicle weight and manufacturing costs while simultaneously meeting the heat dissipation requirements of both the electric drive system and the superstructure system, thus reducing energy consumption.

[0046] Furthermore, such as Figure 1 As shown, the electric drive system cooling branch 100 is connected to the first filling port 150. An electric drive system cooling water pump 140 is installed on the electric drive system cooling branch 100. The electric drive system cooling water pump 140 is located downstream of the first filling port 150 and provides power for the cooling medium. The electric drive system cooling water pump 140 is preferably a variable frequency pump.

[0047] Furthermore, the electric drive system includes a drive motor 120, a drive motor controller 130, and an auxiliary drive 110. The auxiliary drive 110, drive motor 120, drive motor controller 130, and cooling assembly 400 are connected sequentially through the electric drive system cooling branch 100. That is, the cooling medium flows sequentially through the auxiliary drive 110, drive motor 120, and drive motor controller 130 through the electric drive system cooling branch 100, carrying away the heat generated by the auxiliary drive 110, drive motor 120, and drive motor controller 130, and enters the radiator 410. The fan 420 carries away the heat of the cooling medium, and after cooling, it flows through the auxiliary drive 110, drive motor 120, and drive motor controller 130 again to cool them.

[0048] Furthermore, the upper system cooling branch 200 includes a first cooling main pipe 260, a second cooling main pipe 270, a first cooling branch 210, a second cooling branch 220, and a third cooling branch 230, with the first cooling branch 210, second cooling branch 220, and third cooling branch 230 connected in parallel. The first cooling main pipe 260 connects to the inlet of the electric drive system cooling branch 100 and the first cooling branch 210, and also connects to the inlet of the electric drive system cooling branch 100 and the second cooling branch 220, as well as the inlet of the electric drive system cooling branch 100 and the third cooling branch 230. The second cooling main pipe 270 connects to the outlet of the first cooling branch 210 and the electric drive system cooling branch 100, connects to the outlet of the second cooling branch 220 and the electric drive system cooling branch 100, and also connects to the outlet of the third cooling branch 230 and the electric drive system cooling branch 100. When the sweeper is in different working modes, the electric drive system cooling branch 100 can be connected to any one or more of the first cooling branch 210, the second cooling branch 220 and the third cooling branch 230 to cool different equipment in the upper structure system.

[0049] Furthermore, the superstructure system includes a low-pressure water pump motor 211, a low-pressure water pump motor controller 212, a high-pressure water pump motor 221, a high-pressure water pump controller 222, a fan motor 231, and a fan motor controller 232.

[0050] The first cooling branch 210 is equipped with a low-pressure water pump motor 211 and a low-pressure water pump motor controller 212, the second cooling branch 220 is equipped with a high-pressure water pump motor 221 and a high-pressure water pump controller 222, and the third cooling branch 230 is equipped with a fan motor 231 and a fan motor controller 232.

[0051] The inlet of the second cooling branch 220 and the inlet of the third cooling branch 230 merge to form an inlet junction point. The outlet of the second cooling branch 220 and the outlet of the third cooling branch 230 merge to form an outlet junction point. The first cooling main pipe 260 connects to the inlet and inlet junction point of the electric drive system cooling branch 100 and the first cooling branch 210, respectively. The second cooling main pipe 270 connects to the outlet and outlet junction point of the first cooling branch 210 and the electric drive cooling system branch 100, respectively.

[0052] When the sweeper is in low-pressure sweeping mode, the low-pressure water pump motor 211 and the low-pressure water pump motor controller 212 need to be cooled. At this time, the electric drive system cooling branch 100 and the first cooling branch 210 are connected. The cooling medium flows through the auxiliary drive 110, drive motor 120, drive motor controller 130, low-pressure water pump motor 211 and low-pressure water pump motor controller 212 in sequence, and then enters the cooling assembly 400 to cool down.

[0053] When the sweeper is in sweeping mode, the high-pressure water pump motor 221, high-pressure water pump controller 222, fan motor 231, and fan motor controller 232 need to be cooled. These components are connected to the electric drive system cooling branch 100, the second cooling branch 220, and the third cooling branch 230, respectively. That is, the electric drive cooling system branch 100 is connected to the second cooling branch 220 and the third cooling branch 230, respectively. The cooling medium flows sequentially through the auxiliary drive 110, the drive motor 120, and the drive motor controller 130 before being split. Part of the cooling medium flows through the second cooling branch 220, and part of the cooling medium flows through the third cooling branch 230. Afterward, they converge and enter the cooling assembly 400, where the temperature is lowered. The high-pressure water pump motor 221, the high-pressure water pump controller 222, the fan motor 231, and the fan motor controller 232 can be cooled simultaneously.

[0054] Furthermore, the first cooling main pipe 260 is connected to the second filling port 250. A superstructure system cooling water pump 240 is installed on the first cooling main pipe 260, located downstream of the second filling port 250, to provide power for the flow of the cooling medium. It should be noted that the superstructure system cooling water pump 240 may also be omitted, and the superstructure system cooling branch 200 and the electric drive system cooling branch 100 may share a single electric drive system cooling water pump 140.

[0055] Furthermore, the control valve assembly 300 includes a first control valve 310 and a second control valve 320. The first control valve 310 includes a first three-way valve. The first cooling main pipe 260 is connected to the electric drive system cooling branch 100 through the first control valve 310, and the second cooling main pipe 270 is connected to the electric drive system cooling branch 100 through the second control valve 320. The first three-way valve can be a three-way electronic valve or a three-way proportional valve.

[0056] The first three-way valve includes a first port, a second port, and a third port (represented as 123 in the figure). When the first and second ports are connected (i.e., port 12 is connected), the electric drive system cooling branch 100 and the superstructure cooling system branch 200 are not connected. At this time, the superstructure system is not working, and the cooling assembly 400 only cools the electric drive system. When the superstructure system is working and needs to be cooled, the first and third ports of the first three-way valve are connected (i.e., port 13 is connected). At this time, the cooling assembly 400 cools both the electric drive system and the superstructure system.

[0057] Furthermore, in some specific embodiments, the second control valve includes a second three-way valve. The second cooling main pipe 270 is connected to the electric drive system cooling branch 100 through the second three-way valve. By adjusting the conduction of different interfaces of the second three-way valve, it is interlocked with the first three-way valve to realize the connection and disconnection of the electric drive system cooling branch 100 and the superstructure system cooling branch 200.

[0058] In some other specific embodiments, the second control valve 320 includes a two-way valve, which can be a ball valve, butterfly valve, gate valve, etc. It can be a manual valve or an electric valve. The electric drive system cooling branch 100 is connected to the second cooling main pipe 270 through a three-way valve. The second control valve 320 is set on the second cooling main pipe 270. By adjusting the conduction of different interfaces of the first control valve 310, i.e., the opening and closing of the second control valve, the connection and disconnection of the electric drive system cooling branch 100 and the superstructure system cooling branch 200 can be realized.

[0059] Furthermore, the first cooling main pipe 260 is connected to the inlet and inlet junction of the first cooling branch 210 via the third three-way valve 280. The third three-way valve 280 includes a first interface, a second interface, and a third interface (123 shown in the figure). When the sweeper is in low-pressure water spraying mode, the first interface and the third interface are connected, and the first cooling main pipe 260 is connected to the first cooling branch 210, and the cooling medium cools the low-pressure water pump motor 211 and the low-pressure water pump motor controller 212. When the sweeper is in sweeping mode, the first interface and the second interface are connected, and the first cooling main pipe 260 is connected to the second cooling branch 220 and the third cooling branch 230. At this time, the cooling medium cools the high-pressure water pump motor 221, the high-pressure water pump controller 222, the fan motor 231, and the fan motor controller 232.

[0060] Furthermore, when the sweeper is in the first working mode, the electric drive system cooling branch 100 is connected to the first cooling branch 210; when the sweeper is in the second working mode, the electric drive system cooling branch 100 is connected to the second cooling branch 220 and the third cooling branch 230; and when the sweeper is in the third working mode, the electric drive system cooling branch 100 is not connected to the upper structure system cooling branch 200.

[0061] Furthermore, in some specific embodiments, a temperature sensor 160 is provided on the cooling branch 100 of the electric drive system, and the temperature sensor 160 is used to detect the temperature of the cooling medium.

[0062] The specific installation process is as follows: In the vehicle production line workshop, the electric drive system, the electric drive system cooling branch 100 and the cooling component 400 are installed. The vacuum is then drawn to complete the filling of the cooling medium in the electric drive system cooling branch. Afterwards, the vehicle enters the superstructure workshop to install the superstructure system and the superstructure system cooling branch and complete the filling of the cooling medium.

[0063] Taking a sweeper truck as an example, with the first control valve 310 being the first three-way valve and the second control valve 320 being the ball valve (the second cooling main pipe 270 is connected to the electric drive system cooling branch 100 via a three-way valve), the specific working process is explained as follows: When the sweeper truck is in low-pressure water spraying mode, the electric drive system cooling branch 100 is connected to the first cooling branch 210, the first and third interfaces of the first three-way valve are connected, the first and third interfaces of the third three-way valve 280 are connected, the ball valve is in the open state, preferably in the fully open state, the electric drive system cooling water pump 140 and the upper structure system cooling water pump 240 are both running, the cooling medium flows sequentially through the auxiliary drive 110, drive motor 120, drive motor controller 130, low-pressure water pump motor 211 and low-pressure water pump motor controller 212 to cool each piece of equipment, and then enters the radiator 410, where it is cooled by the fan 420. The speeds of the electric drive system cooling water pump 140, the superstructure system cooling water pump 240, and the fan are controlled according to the specific heat dissipation requirements of the electric drive system and the superstructure system.

[0064] When the sweeper is in sweeping mode, the electric drive cooling system branch 100 is connected to the second cooling branch 220 and the third cooling branch 230 respectively. The first and third ports of the first three-way valve are connected, and the first and second ports of the third three-way valve 280 are connected. The ball valve is in the open state, preferably fully open. The electric drive system cooling water pump 140 and the superstructure system cooling water pump 240 are both running. The cooling medium flows sequentially through the auxiliary drive 110, the drive motor 120, and the drive motor controller 130. After passing through the inlet confluence point, it flows through the second cooling branch 220 and the third cooling branch 230 respectively, cooling the high-pressure water pump motor 221, the high-pressure water pump motor controller 222, the fan motor 231, and the fan motor controller 232. Then it enters the radiator 410, where it is cooled by the fan 420. The speed of the electric drive system cooling water pump 140, the superstructure system cooling water pump 240, and the fan 420 is controlled according to the specific heat dissipation requirements of the electric drive system and the superstructure system.

[0065] When the superstructure system is not in operation, the first and second ports of the first three-way valve are connected, and the ball valve is in the open or closed state, preferably in the closed state. The cooling medium flows only through the electric drive system cooling branch 100. Specifically, the cooling medium flows sequentially through the auxiliary drive 110, the drive motor 120, and the drive motor controller 130 before entering the radiator 410, where it is cooled by the fan 420, thus cooling the electric drive system. The speed of the electric drive system cooling water pump 140 and the fan 420 is controlled according to the specific heat dissipation requirements of the electric drive system and the superstructure system. At this time, the superstructure system cooling water pump 240 is not running.

[0066] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0067] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0068] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A sweeper-sterilizer-cooler system characterized by, The application relates to a cooling system for a washing and sweeping vehicle. The cooling system comprises: an electric drive system cooling branch (100) which is connected to an electric drive system of the washing and sweeping vehicle and cools the electric drive system; an upper system cooling branch (200) which is connected to an upper system of the washing and sweeping vehicle and cools the upper system, wherein the upper system cooling branch (200) is connected to the electric drive system cooling branch (100) through a control valve assembly (300); 2. The sweeper-sterilizer-cooler system, as claimed in claim 1, wherein, a cooling assembly (400) which comprises a radiator (410) and a fan (420) and is arranged on the electric drive system cooling branch (100).

3. The sweeper-sterilizer-cooler system, as claimed in claim 2, wherein, The electric drive system cooling branch (100) is connected to a first filling opening (150), and an electric drive system cooling water pump (140) is arranged on the electric drive system cooling branch (100) and downstream of the first filling opening (150).

4. The sweeper-sterilizer-cooler system, as claimed in claim 3, wherein, The electric drive system comprises a drive motor (120), a drive motor controller (130) and an auxiliary drive (110), and the auxiliary drive (110), the drive motor (120), the drive motor controller (130) and the cooling assembly (400) are sequentially connected through the electric drive system cooling branch (100). The upper system cooling branch (200) comprises a first cooling main pipe (260), a second cooling main pipe (270), a first cooling branch (210), a second cooling branch (220) and a third cooling branch (230), and the first cooling branch (210), the second cooling branch (220) and the third cooling branch (230) are connected in parallel.

5. The sweeper-sterilizer-cooler system, as claimed in claim 4, wherein, The first cooling main pipe (260) is connected to the inlet of the first cooling branch (210), the inlet of the second cooling branch (220) and the inlet of the third cooling branch (230) of the electric drive system cooling branch (100), and the second cooling main pipe (270) is connected to the outlet of the first cooling branch (210), the outlet of the second cooling branch (220), the outlet of the third cooling branch (230) and the electric drive system cooling branch (100). The upper system comprises a low-pressure water pump motor (211), a low-pressure water pump motor controller (212), a high-pressure water pump motor (221), a high-pressure water pump controller (222), a fan motor (231) and a fan motor controller (232). The low-pressure water pump motor (211) and the low-pressure water pump motor controller (212) are arranged on the first cooling branch (210), the high-pressure water pump motor (221) and the high-pressure water pump controller (222) are arranged on the second cooling branch (220), and the fan motor (231) and the fan motor controller (232) are arranged on the third cooling branch (230). The inlet of the second cooling branch (220) and the inlet of the third cooling branch (230) converge to form an inlet convergence point, and the outlet of the second cooling branch (220) and the outlet of the third cooling branch (230) converge to form an outlet convergence point; The first cooling main pipe (260) respectively communicates the inlet of the first cooling branch (210) and the inlet convergence point with the electric drive system cooling branch (100), and the second cooling main pipe (270) respectively communicates the outlet of the first cooling branch (210), the outlet convergence point and the electric drive system cooling branch (100).

6. The sweeper-sterilizer-cooler system, as claimed in claim 5, wherein, The first cooling main pipe (260) communicates the second filling port (250), and the first cooling main pipe (260) is provided with an upper-mounted system cooling water pump (240) arranged downstream of the second filling port (250).

7. The sweeper-sterilizer-cooler system, as claimed in claim 6, wherein, The control valve assembly (300) comprises a first control valve (310) and a second control valve (320), the first control valve (310) comprises a first three-way valve, and the first cooling main pipe (260) communicates with the electric drive system cooling branch (100) through the first control valve (310); The second cooling main pipe (270) communicates with the electric drive system cooling branch (100) through the second control valve (320).

8. The sweeper-sterilizer-cooler system, as claimed in claim 7, wherein, The second control valve (320) comprises a second three-way valve, and the second cooling main pipe (270) communicates with the electric drive system cooling branch (100) through the second three-way valve; or, The second control valve (320) comprises a two-way valve, the electric drive system cooling branch (100) communicates with the second cooling main pipe (270) through a three-way valve, and the second control valve (320) is arranged on the second cooling main pipe (270).

9. The sweeper-sterilizer-cooler system, as claimed in claim 8, wherein, The first cooling main pipe (260) communicates the inlet of the first cooling branch (210) and the inlet convergence point through a third three-way valve (280).

10. The sweeper-sterilizer-cooler system, as claimed in claim 8, wherein, When the washing and sweeping vehicle is in a first working mode, the electric drive system cooling branch (100) communicates with the first cooling branch (210), and the electric drive system cooling water pump (140) and the upper-mounted system cooling water pump (240) are both in operation; When the washing and sweeping vehicle is in a second working mode, the electric drive system cooling branch (100) communicates with the second cooling branch (220) and the third cooling branch (230), and the electric drive system cooling water pump (140) and the upper-mounted system cooling water pump (240) are both in operation; When the washing and sweeping vehicle is in a third working mode, the electric drive system cooling branch (100) does not communicate with the upper-mounted system cooling branch (200), and the electric drive system cooling water pump (140) is in operation.

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