Heat dissipation system and operation machine

Abstract

The utility model provides a heat dissipation system and an operation machine. The heat dissipation system comprises an integrated box body; the heat dissipation device is integrally installed on the integrated box body and comprises an air cooling heat dissipation device, an electric control heat dissipation device, a motor heat dissipation device and a liquid cooling heat dissipation device, the air cooling heat dissipation device and the liquid cooling heat dissipation device are used for cooling the engine, and the electric control heat dissipation device is used for cooling the motor control module and the generator controller. The motor radiator is used for cooling the generator and the wheel edge motor set; and the heat dissipation fan is used for cooling the heat dissipation device. According to the heat dissipation system, the air cooling radiator, the electric control radiator, the motor radiator and the liquid cooling radiator are integrally installed in the same integrated box body, the air cooling radiator, the electric control radiator, the motor radiator and the liquid cooling radiator are cooled in a centralized mode through the heat dissipation fan, pipeline arrangement is simpler, and energy consumption is lower.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of operation machinery, especially relates to a heat dissipation system and operation machinery. BACKGROUND

[0002] Electric or range extender loader, excavator and other operation machinery in the field operation, its load is big, operation time is long, motor electric control and other electric drive equipment is in the working state for a long time, the heat quantity is big, the temperature rises too fast, easily causes whole machine power drop, causes mechanical failure, therefore needs to the electric drive system carries out heat dissipation.

[0003] In order to solve the heat dissipation problem of electric drive of the existing electric or range extender loader, excavator and other operation machinery, one way is to install multiple radiators nearby, and to disperse heat, which leads to complex structure design, messy pipeline arrangement, high energy consumption and high maintenance cost. Another way is to use a series connection, which sequentially connects the radiator, water pump, controller and motor to centrally dissipate heat. This way not only has high energy consumption, but also cannot separately control the heat dissipation temperature of the motor and the controller, and has poor heat dissipation effect and poor controllability. SUMMARY

[0004] The main purpose of the utility model is to provide a heat dissipation system and operation machinery, which aims to solve the technical problems of high energy consumption and complex pipeline arrangement of the existing heat dissipation system.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a heat dissipation system for heat dissipation of a drive system, wherein the drive system includes an engine, a generator, a wheel edge motor set, a generator controller and a motor control module, and the heat dissipation system includes an integrated box body, a heat dissipation device integratedly installed in the integrated box body and including an air-cooled radiator, an electric control radiator, a motor radiator and a liquid-cooled radiator, the air-cooled radiator and the liquid-cooled radiator being used to cool the engine, the electric control radiator being used to cool the motor control module and the generator controller, and the motor radiator being used to cool the generator and the wheel edge motor set, and a heat dissipation fan used to cool the heat dissipation device.

[0006] In the embodiment of the utility model, the motor radiator is connected to the wheel edge motor set and the generator through two parallel motor radiators.

[0007] In the embodiment of the utility model, the wheel edge motor set includes two front motors and two rear motors, the heat dissipation system further includes two first series pipelines connected in parallel, two front motors are connected in series on one of the first series pipelines, and two rear motors are connected in series on the other first series pipeline, one end of the first series pipeline is connected to the motor radiator, and the other end is connected to the motor radiator through a motor liquid return pipe.

[0008] In the embodiment of the utility model, the electric control radiator is connected with the generator controller and the motor control module through two parallel electric control radiators.

[0009] In the embodiment of the utility model, the motor control module comprises two front controllers and two rear controllers, the heat dissipation system further comprises two second series pipelines connected in parallel, two front controllers are connected in series on one of the second series pipelines, two rear controllers are connected in series on the other second series pipeline, one end of the second series pipeline is connected with the electric control radiator, and the other end is connected with the electric control radiator through an electric control liquid return pipe.

[0010] In the embodiment of the utility model, the heat dissipation system further comprises a controller and a temperature sensor for detecting the temperature of the heat dissipation device, the temperature sensor and the heat dissipation fan are electrically connected with the controller, the controller is used for increasing or decreasing the rotating speed of the heat dissipation fan according to the temperature signal of the temperature sensor, and / or the heat dissipation fan comprises a fan body and a protective net, the fan body is installed on the side of the heat dissipation device away from the integrated box body, a maintenance opening is arranged on the side of the fan body away from the heat dissipation device, and the protective net is installed at the maintenance opening and is used for protecting or opening the maintenance opening.

[0011] In the embodiment of the utility model, the heat dissipation system further comprises a first liquid supplementing tank, the electric control radiator and the motor radiator are connected with the first liquid supplementing tank through liquid supplementing pipes, and the first liquid supplementing tank is used for supplementing the cooling liquid to the electric control radiator and the motor radiator.

[0012] In the embodiment of the utility model, the electric control radiator and the motor radiator are connected with the first liquid supplementing tank through pipelines, and an exhaust pipe with a one-way exhaust valve is arranged on the first liquid supplementing tank.

[0013] The utility model also provides a working machine, the working machine comprises a driving system and the heat dissipation system, and the heat dissipation system is used for cooling the driving system.

[0014] In the embodiment of the utility model, the driving system comprises an engine, a generator, a wheel edge motor set, a generator controller and a motor control module, and the generator controller and the motor control module are integrated and installed in the same electric control cabinet.

[0015] Through the above technical scheme, the heat dissipation system provided by the embodiment of the utility model has the following beneficial effects:

[0016] The heat dissipation system is connected with the integrated box and the heat dissipation device, and multiple heat dissipation components, such as the air-cooled radiator, the electric control radiator, the motor radiator and the liquid-cooled radiator, are integrated in the integrated box to form a combined heat dissipation component. By assembling the independent heat dissipation components of the engine, the generator, the wheel edge motor set, the generator controller and the motor control module into a combined heat dissipation box, and then cooperating with the heat dissipation fan to centrally cool the heat dissipation device, the pipeline arrangement can be optimized, the pipeline arrangement is simpler, the structure design is simplified, and the energy consumption in the pipeline can be reduced. In the heat dissipation system, the air-cooled radiator, the electric control radiator, the motor radiator and the liquid-cooled radiator are integrated and installed in the same integrated box, and the air-cooled radiator, the electric control radiator, the motor radiator and the liquid-cooled radiator are centrally cooled by the heat dissipation fan, so that the pipeline arrangement is simpler and the energy consumption is lower.

[0017] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following detailed description to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0019] Fig. 1 is a structural schematic view of the heat dissipation system in one embodiment of the present application from one perspective;

[0020] Fig. 2 is a structural schematic view of the heat dissipation system in one embodiment of the present application from another perspective;

[0021] Fig. 3 is a water connection schematic view of the heat dissipation system in one embodiment of the present application.

[0022] EXPLANATION OF REFERENCE NUMERALS

[0023] Reference number Name Reference number Name

[0024] 100 heat dissipation system 243 third liquid outlet

[0025] 1 integrated box 244 third liquid outlet

[0026] 2 heat dissipation device 3 heat dissipation fan

[0027] 21 air-cooled radiator 31 fan body

[0028] 211 air inlet 32 protective net

[0029] 212 outlet 4 motor heat dissipation pipe

[0030] 22 electric control radiator 5 first series pipeline

[0031] 221 first return liquid port 6 motor return liquid pipe

[0032] 222 first exhaust port 7 electric control heat dissipation pipe

[0033] 223 first liquid outlet 8 second series pipeline

[0034] 224 first liquid supplement port 9 electric control return liquid pipe

[0035] 225 first liquid discharge port 10 sensor interface

[0036] 23 motor radiator 101 first liquid supplement tank

[0037] 231 second return liquid port 102 water pump

[0038] 232 second exhaust port 201 generator

[0039] 233 second liquid outlet 202 front motor

[0040] 234 second liquid supplement port 203 rear motor

[0041] 235 second liquid discharge port 204 generator controller

[0042] 24 liquid cooling radiator 205 front controller

[0043] 241 third exhaust port 206 rear controller

[0044] 242 third return liquid port DETAILED DESCRIPTION

[0045] The specific embodiments described hereinbelow are intended to be illustrative only and are not intended to limit the scope of the present application. It should be understood that various modifications can be made to the procedures and / or apparatuses described hereinbelow without departing from the scope or spirit of the present application.

[0046] A heat dissipation system according to the present application is described below with reference to the accompanying drawings.

[0047] As Figs. 1 to 3As shown, in the embodiment of the utility model, the heat dissipation system 100 is used for heat dissipation of the drive system, the drive system includes engine, generator 201, wheel edge motor group, generator controller 204 and motor control module, the heat dissipation system 100 includes integrated box 1, heat dissipation device 2 and heat dissipation fan 3, heat dissipation device 2 is integratedly installed in integrated box 1 and includes air cooling radiator 21, electric control radiator 22, motor radiator 23 and liquid cooling radiator 24, air cooling radiator 21 and liquid cooling radiator 24 are used for cooling engine, electric control radiator 22 is used for cooling motor control module and generator controller 204, and motor radiator 23 is used for cooling generator 201 and wheel edge motor group;Heat dissipation fan 3 is used for cooling heat dissipation device 2.Motor control module is used for controlling wheel edge motor group.

[0048] It needs to be explained that air cooling radiator 21 and liquid cooling radiator 24 are connected with engine through cooling pipe (gas pipe or liquid pipe), electric control radiator 22 is connected with motor control module and generator controller 204 through cooling pipe, and motor radiator 23 is connected with generator 201 and wheel edge motor group through cooling pipe.The heat dissipation fan 3 in the embodiment can adopt the air-suction heat dissipation fan, can carry out centralized cooling heat dissipation to heat dissipation device 2 on integrated box 1, and the heat dissipation fan 3 can also adopt the air-blowing heat dissipation type.The heat dissipation fan 3 can be a single one, or two or more fans can be combined to dissipate heat.The number of air cooling radiator 21, electric control radiator 22, motor radiator 23 and liquid cooling radiator 24 can be set according to actual needs, which can be one, two or more.

[0049] The heat dissipation system 100 in the embodiment is connected through integrated box 1 and heat dissipation device 2, integrates air cooling radiator 21, electric control radiator 22, motor radiator 23 and liquid cooling radiator 24 in integrated box 1, and forms combined heat dissipation components.By assembling the independent heat dissipation components of engine, generator 201, wheel edge motor group, generator controller 204 and motor control module into a combined heat dissipation box, and then cooperating with heat dissipation fan 3 to carry out centralized cooling to heat dissipation device 2, the pipe arrangement disorder and high energy consumption caused by the installation of heat dissipation components in the prior art can be avoided, the optimization of pipe arrangement is realized, the pipe arrangement is simpler, the structure design is simplified, and the energy consumption in the pipe is reduced.The heat dissipation system 100 in the embodiment integrates air cooling radiator 21, electric control radiator 22, motor radiator 23 and liquid cooling radiator 24 in the same integrated box 1, and carries out centralized cooling to air cooling radiator 21, electric control radiator 22, motor radiator 23 and liquid cooling radiator 24 through heat dissipation fan 3, so that the pipe arrangement is simpler and the energy consumption is lower.

[0050] And, the engine, the generator 201, the wheel edge motor group, the generator controller 204 and the motor control module of the drive system are respectively provided with four radiators in the embodiment, different components are grouped and radiated, the cross-influence of the radiating effect between the components of the drive system can be avoided, and the radiating effect is better. The top of the air-cooled radiator 21 is provided with an air inlet 211, and the bottom is provided with an air outlet 212. The air outlet 212 and the air inlet 211 are connected with the engine through air pipes and radiate the air of the engine.

[0051] Specifically, the motor radiator 23 is connected with the wheel edge motor group and the generator 201 through two parallel motor radiating pipes 4. Fig. 3 As shown in the figure, the motor radiator 23 in the embodiment radiates the wheel edge motor group and the generator 201 through two parallel motor radiating pipes 4, realizes the grouped radiating of the motor radiator 23, avoids the cross-mixed radiating between the components with different working temperature requirements, has better radiating effect, stronger radiating capacity, and the motor radiating pipe 4 can be provided with a water pump 102. By starting and stopping the water pump 102, the cooling of the wheel edge motor group and the generator 201 can be started or stopped.

[0052] As shown in the figure, Fig. 1 The bottom of the motor radiator 23 is provided with two second liquid outlets 233, and the second liquid outlet 233 and the motor radiating pipe 4 can be connected one by one. The second liquid outlet 233 arranged at the bottom can ensure the smooth liquid outflow of the cooling liquid in the motor radiator 23. The top of the motor radiator 23 can be provided with a second liquid return port 231 for liquid return and a second exhaust port 232 for exhaust. The arrangement at the top can facilitate exhaust and liquid return.

[0053] In an embodiment, the wheel edge motor group includes two front motors 202 and two rear motors 203, and the radiating system 100 further includes two parallel first series pipes 5. The two front motors 202 are connected in series on one of the first series pipes 5, and the two rear motors 203 are connected in series on the other first series pipe 5. One end of the first series pipe 5 is connected with the motor radiating pipe 4, and the other end is connected with the motor radiator 23 through a motor liquid return pipe 6.

[0054] In the embodiment, the two first series pipes 5 are connected in parallel. One of the first series pipes 5 connects the two front motors 202 in series, and the other first series pipe 5 connects the two rear motors 203 in series, forming a front-front series and rear-rear series pipe connection mode, which can ensure the connection between the nearby motors, and the motor liquid return pipe 6 can be connected with the second liquid return port 231.

[0055] It should be noted that the electronically controlled radiator 22 is connected to the generator controller 204 and the motor control module via two parallel electronically controlled heat pipes 7. Each electronically controlled heat pipe 7 is equipped with a water pump 102, which pumps coolant to the generator controller 204 and the motor control module respectively. In this embodiment, the electronically controlled radiator 22, via the two parallel electronically controlled heat pipes 7, can independently dissipate heat for the generator controller 204 and the motor control module. This independent heat dissipation avoids cross-dissipation of heat between components with different operating temperature requirements, resulting in better heat dissipation and greater heat dissipation capacity.

[0056] Specifically, the bottom of the electronically controlled radiator 22 may be provided with two first liquid outlets 223, which are connected one-to-one with the electronically controlled heat pipes 7. This bottom arrangement facilitates the smooth discharge of the coolant. The top of the electronically controlled radiator 22 may be provided with a first liquid return port 221 for liquid return and a first exhaust port 222 for exhaust, facilitating the return and exhaust of the electronically controlled radiator 22.

[0057] like Fig. 3 As shown, the motor control module includes two front controllers 205 and two rear controllers 206, and the heat dissipation system 100 also includes two second series pipes 8 connected in parallel. The two front controllers 205 are connected in series to one of the second series pipes 8, and the two rear controllers 206 are connected in series to the other second series pipe 8. One end of the second series pipe 8 is connected to the electronically controlled heat dissipation pipe 7, and the other end is connected to the electronically controlled radiator 22 through the electronically controlled return pipe 9. The cooling pipe connection method of the motor control module and the wheel-side motor group in this embodiment is the same, both using a front-to-front series connection combined with a rear-to-rear series connection method. Connecting the two second series pipes 8 in parallel can simplify the pipe connection and avoid the situation where the pipe is too long and causes high energy consumption. The electronically controlled return pipe 9 can be connected to the first return liquid port 221.

[0058] It can be understood that the front controller 205 and the rear controller 206 are both motor controllers. The two front controllers 205 are electrically connected to the two front motors 202 in a one-to-one correspondence, and the two rear controllers 206 are electrically connected to the two rear motors 203 in a one-to-one correspondence. The two front motors 202 are used to drive the two front running wheels of the working machine, and the two rear motors 203 are used to drive the two rear running wheels of the working machine.

[0059] It should be noted that the liquid cooling radiator 24 is provided with a third liquid outlet 243 at the bottom and a third liquid return port 242 at the top, which can be connected to the engine through a cooling pipe for liquid cooling and heat dissipation of the engine.

[0060] In one embodiment, the heat dissipation system 100 also includes a controller and a temperature sensor for detecting the temperature of the heat dissipation device 2. The temperature sensor and the heat dissipation fan 3 are electrically connected to the controller. The controller is used to increase or decrease the speed of the heat dissipation fan 3 according to the temperature signal of the temperature sensor.

[0061] The rotating speed of the heat dissipation fan 3 in the embodiment can be intelligently adjusted through temperature feedback of the heat dissipation device 2. When the temperature fed back to the controller by the temperature sensor is higher than the set maximum temperature, the controller can increase the rotating speed of the heat dissipation fan 3 to accelerate heat dissipation and reduce the temperature of the heat dissipation device 2; when the temperature fed back to the controller by the temperature sensor is lower than the set minimum temperature, the controller can reduce the rotating speed of the heat dissipation fan 3 to reduce heat dissipation and increase the temperature of the heat dissipation device 2; when the temperature fed back by the temperature sensor is in the set temperature interval, the controller can control the heat dissipation fan 3 to rotate at the set rotating speed, so that the heat dissipation device 2 is always in the best thermal equilibrium state.

[0062] The embodiment adjusts the rotating speed of the heat dissipation fan 3 in real time through cooperation of the temperature sensor and the controller, controls the temperature of the heat dissipation device 2 by automatically adjusting the rotating speed of the heat dissipation fan 3, accelerates or slows down heat dissipation of the heat dissipation device 2, thereby achieving the purpose of meeting the heat dissipation requirement of the heat-dissipated component, ensuring that the heat-dissipated component operates in the best temperature interval, reducing energy consumption on the premise of ensuring good heat dissipation effect, improving self-adaptability, and being more intelligent. In an embodiment, the bottom of the electric control radiator 22 and the electric machine radiator 23 is provided with a sensor interface 10 connected with the temperature sensor, facilitating installation of the temperature sensor, and the temperature of the outlet end of the electric control radiator 22 and the electric machine radiator 23 is detected through the two temperature sensors to accurately feed back the current cooling performance of the electric control radiator 22 and the electric machine radiator 23.

[0063] In addition, the heat dissipation fan 3 includes a fan body 31 and a protective net 32, the fan body 31 is installed on the side of the heat dissipation device 2 away from the integrated box 1, the side of the fan body 31 away from the heat dissipation device 2 is provided with an access hole, and the protective net 32 is installed at the access hole and used for protecting or opening the access hole. The protective net 32 can be connected with the fan body 31 through a hinge, and the access hole can be opened by rotating the protective net 32, so that the heat dissipation fan 3 and the heat dissipation device 2 are cleaned, and later maintenance is simpler and more convenient.

[0064] It should be noted that the heat dissipation system 100 further includes a first liquid supplement tank 101 and a second liquid supplement tank, the electric control radiator 22 and the electric machine radiator 23 are connected with the first liquid supplement tank 101 through a liquid supplement pipe, the first liquid supplement tank 101 is used for supplementing cooling liquid to the electric control radiator 22 and the electric machine radiator 23, the liquid cooling radiator 24 is connected with the second liquid supplement tank, and the second liquid supplement tank is used for supplementing cooling liquid to the liquid cooling radiator 24.

[0065] The first liquid supplement tank 101 can be located at the top of the heat dissipation device 2, the bottom of the electric control radiator 22 is further provided with a first liquid supplement port 224 communicated with the first liquid supplement tank 101 and a first liquid discharge port 225 communicated with the outside, the bottom of the motor radiator 23 is further provided with a second liquid supplement port 234 communicated with the first liquid supplement tank 101 and a second liquid discharge port 235 communicated with the outside, and the bottom of the liquid cooling radiator 24 is further provided with a third liquid discharge port 244 communicated with the outside, so that the remaining water can be discharged through the liquid discharge port in the case of needing to overhaul, and the radiator can be conveniently overhauled. The first exhaust port 222 of the electric control radiator 22 and the second exhaust port 232 of the motor radiator 23 can discharge gas, and the liquid can be conveniently returned. In the embodiment, the electric control radiator 22 and the motor radiator 23 are supplemented with the cooling liquid through the first liquid supplement tank 101, and the liquid cooling radiator 24 is supplemented with the cooling liquid through the second liquid supplement tank, so that the requirements of different components on the cooling liquid ratio can be met.

[0066] In an embodiment, the electric control radiator 22 and the motor radiator 23 are connected to the first liquid supplement tank 101 through pipelines, and the first liquid supplement tank 101 is provided with an exhaust pipe with a one-way exhaust valve. The first exhaust port 222 of the electric control radiator 22 and the second exhaust port 232 of the motor radiator 23 are connected to the first liquid supplement tank 101 through pipelines, and in the embodiment, the exhaust is performed through the exhaust pipe with the one-way exhaust valve on the first liquid supplement tank 101, so that the electric control radiator 22 and the motor radiator 23 share a one-way exhaust gas path, and the pipeline can be simplified.

[0067] The utility model also proposes a kind of working machine, and working machine includes drive system and above-mentioned heat dissipation system 100, heat dissipation system 100 is used to cool drive system, and the specific structure of this heat dissipation system 100 refers to above-mentioned embodiment. Since working machine adopts all technical solutions of above-mentioned all embodiments, it at least has all beneficial effects brought by the technical solutions of above-mentioned embodiments, and here will not be repeated one by one. In an embodiment, working machine can be applied to range extender or electric loader, and can also be applied to excavator, bulldozer and other engineering equipment.

[0068] Specifically, the drive system includes an engine, a generator 201, a wheel edge motor set, a generator controller 204 and a motor control module, and the generator controller 204 and the motor control module are integratedly installed in the same electric control cabinet. In the embodiment, the generator controller 204 and the wheel edge motor set are integratedly installed in the same electric control cabinet, so that later debugging and maintenance can be facilitated.

[0069] In the description of the utility model, it is understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0070] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0071] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and the skilled in the art can change, modify, replace and modify the above embodiments within the scope of the utility model.

Claims

1. A heat dissipation system for dissipating heat in a drive system, wherein the drive system comprises an engine, a generator (201), a wheel-side motor group, a generator controller (204) and a motor control module, characterized in that: The heat dissipation system (100) comprises: Integrated box (1); A heat dissipation device (2) is integrated with the integrated housing (1) and comprises an air-cooling radiator (21), an electric-controlled radiator (22), a motor radiator (23) and a liquid-cooling radiator (24), wherein the air-cooling radiator (21) and the liquid-cooling radiator (24) are used to cool the engine, the electric-controlled radiator (22) is used to cool the motor control module and the generator controller (204), and the motor radiator (23) is used to cool the generator (201) and the wheel-side motor group; A heat dissipation fan (3) is used to cool the heat dissipation device (2).

2. The heat dissipation system according to claim 1, characterized in that: The motor radiator (23) is respectively connected to the wheel-side motor group and the generator (201) through two motor heat dissipation pipes (4) arranged in parallel.

3. The heat dissipation system according to claim 2, characterized in that: The wheel-side motor group includes two front motors (202) and two rear motors (203), and the heat dissipation system (100) also includes two first series pipes (5) connected in parallel, the two front motors (202) are connected in series to one of the first series pipes (5), and the two rear motors (203) are connected in series to the other first series pipe (5), one end of the first series pipe (5) is connected to the motor heat dissipation pipe (4), and the other end is connected to the motor radiator (23) through the motor return pipe (6).

4. The heat dissipation system according to claim 1, wherein: The electrically controlled radiator (22) is respectively connected to the generator controller (204) and the motor control module via two electrically controlled heat dissipation pipes (7) arranged in parallel.

5. The heat dissipation system according to claim 4, characterized in that: The motor control module includes two front controllers (205) and two rear controllers (206). The heat dissipation system (100) also includes two second series pipes (8) connected in parallel, the two front controllers (205) are connected in series to one of the second series pipes (8), and the two rear controllers (206) are connected in series to the other of the second series pipes (8). One end of the second series pipe (8) is connected to the electrically controlled heat dissipation pipe (7), and the other end is connected to the electrically controlled radiator (22) through an electrically controlled liquid return pipe (9).

6. The heat dissipation system according to any one of claims 1 to 5, characterized in that: The heat dissipation system (100) further comprises a controller and a temperature sensor for detecting the temperature of the heat dissipation device (2); the temperature sensor and the heat dissipation fan (3) are electrically connected to the controller; the controller is used to increase or decrease the rotation speed of the heat dissipation fan (3) according to the temperature signal from the temperature sensor; and / or, The heat dissipation fan (3) comprises a fan body (31) and a protective net (32); the fan body (31) is installed on a side of the heat dissipation device (2) facing away from the integrated box (1); an inspection port is provided on the side of the fan body (31) facing away from the heat dissipation device (2); the protective net (32) is installed at the inspection port and is used to protect or open the inspection port.

7. The heat dissipation system according to any one of claims 1 to 5, characterized in that: The heat dissipation system (100) further includes: a first liquid replenishing tank (101), wherein the electronically controlled radiator (22) and the motor radiator (23) are both connected to the first liquid replenishing tank (101) via a liquid replenishing pipe, and the first liquid replenishing tank (101) is used to replenish coolant to the electronically controlled radiator (22) and the motor radiator (23); A second liquid replenishing tank is connected to the liquid cooling radiator (24), and the second liquid replenishing tank is used to replenish coolant to the liquid cooling radiator (24).

8. The heat dissipation system according to claim 7, characterized in that: The electronically controlled radiator (22) and the motor radiator (23) are both connected to the first fluid replenishing tank (101) through pipelines, and the first fluid replenishing tank (101) is provided with an exhaust pipe with a one-way exhaust valve.

9. A working machine, characterized in that: The working machine comprises a drive system and a heat dissipation system (100) according to any one of claims 1 to 8, wherein the heat dissipation system (100) is used for cooling the drive system.

10. The working machine according to claim 9, characterized in that: The drive system comprises an engine, a generator (201), a wheel-side motor group, a generator controller (204) and a motor control module, wherein the generator controller (204) and the motor control module are integrated and installed in the same electric control cabinet.

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