A range extender cotton picker thermal management system and range extender cotton picker

Abstract

The application discloses a range-extending type cotton picker thermal management system and a range-extending type cotton picker, and belongs to the technical field of new energy agricultural machinery. The system is different from the heat dissipation requirements between different heat dissipation modules and different units, and the low heat dissipation requirement hydraulic heat dissipation module and the battery heat dissipation module are heat dissipated through the first heat dissipation circuit, the high heat dissipation requirement motor heat dissipation unit and the electric control heat dissipation unit are heat dissipated through the second heat dissipation circuit, and the components with high heat dissipation requirement and the components with low heat dissipation requirement are heat dissipated after being distinguished, so that the overall thermal management system is simplified, the overall thermal management system components are simplified, the arrangement is simpler, the size of the whole machine can be reduced, meanwhile, the second heat dissipation circuit exchanges heat with the refrigeration circuit through the first heat exchanger, the cooling medium in the second heat dissipation circuit is cooled through the refrigeration circuit, and it is ensured that the motor heat dissipation unit and the electric control heat dissipation unit can be kept in a safe temperature range under certain extreme conditions.

Description

Technical Field

[0001] This invention relates to the field of new energy agricultural machinery technology, specifically to a range-extended cotton harvester thermal management system and a range-extended cotton harvester. Background Technology

[0002] Cotton harvesters are mainly used for picking cotton. In order to meet the call for energy conservation and emission reduction, electric cotton harvesters have emerged. At present, electric cotton harvesters are generally range-extended, which use an engine to generate electricity to provide power. The walking, picking head and fan movements are all driven by electric motors, while auxiliary actions such as lifting and lowering the picking head are generally realized by hydraulic systems and are equipped with battery packs.

[0003] The heat dissipation of electric cotton harvesters mainly consists of four parts: air conditioning cooling and heating, battery pack heat dissipation, motor and electronic control heat dissipation, and hydraulic system heat dissipation. Currently, existing technologies usually separate the heat dissipation of these four parts independently, resulting in low system integration, low efficiency of the vehicle's thermal management system, and complex structure. In addition, electric cotton harvesters have many motors and controllers, and the cooling power required for each is different.

[0004] The existing thermal management system for range-extended cotton harvesters has the following defects:

[0005] 1. In the current technology, the thermal management system of the battery pack, the air conditioning thermal system, the motor and electronic control cooling system, and the hydraulic cooling system are all separate. This results in a large number of heat dissipation components in the thermal management system and a low efficiency of the overall vehicle thermal management system. It usually includes multiple air-cooled radiators, such as the hydraulic system, the motor and electronic control cooling system, and the battery cooling system, each equipped with a separate air-cooled radiator. This makes the arrangement difficult and results in a large overall size.

[0006] 2. Motor and electronic control cooling systems generally use simple air-cooling systems. Air-cooled radiators have low heat exchange capacity. To achieve the same heat exchange capacity, a larger heat exchange area is required than liquid cooling. In hot and harsh environments, it is difficult to guarantee heat dissipation.

[0007] Based on this, the present invention designs a range-extended cotton harvester thermal management system and a range-extended cotton harvester to solve the above problems. Summary of the Invention

[0008] This invention provides a range-extended cotton harvester thermal management system and a range-extended cotton harvester to solve the technical problems of existing thermal management systems being too complex and the motor and electronic control cooling systems having poor heat dissipation effects.

[0009] According to one aspect of the present invention, a thermal management system for a range-extended cotton harvester is provided, comprising a first heat dissipation circuit, a second heat dissipation circuit, and a refrigeration circuit. The first heat dissipation circuit includes a hydraulic heat dissipation module for mounting on a hydraulic device and a battery heat dissipation module for mounting on a battery device. The second heat dissipation circuit includes a motor heat dissipation unit for mounting on a motor device and an electronic control heat dissipation unit for mounting on an electronic control device. The refrigeration circuit includes a heat exchange module, a compressor, a condenser, and an expansion valve unit connected in sequence. The heat exchange module includes an evaporator and a first heat exchanger connected in parallel. The evaporator is used to exchange heat with air inside or entering the cabin. The first heat exchanger is disposed in the second heat dissipation circuit and is used to exchange heat with the cooling medium in the second heat dissipation circuit.

[0010] As a further embodiment of the present invention, the refrigeration circuit further includes a first electrically controlled valve and a second electrically controlled valve, and the expansion valve unit includes a first expansion valve and a second expansion valve; the input end of the first expansion valve is connected to the output end of the condenser, the output end of the first expansion valve is connected to the input end of the evaporator, the output end of the evaporator is connected to the input end of the first electrically controlled valve, and the output end of the first electrically controlled valve is connected to the input end of the compressor; the input end of the second expansion valve is connected to the output end of the condenser, the output end of the second expansion valve is connected to the first end of the first heat exchanger, the second end of the first heat exchanger is connected to the input end of the second electrically controlled valve, and the output end of the second electrically controlled valve is connected to the input end of the compressor; the output end of the compressor is connected to the input end of the condenser.

[0011] As a further embodiment of the present invention, the range-extended cotton harvester thermal management system further includes a third heat dissipation circuit, which includes a first radiator, a first water pump, an engine cooling module, and a first branch circuit. The output end of the first radiator is connected to the input end of the first water pump. The output end of the first water pump is connected to the input end of the engine cooling module. The engine cooling module is installed on the engine to dissipate heat from the engine. The output end of the engine cooling module is connected to the input end of the first radiator and the input end of the first branch circuit, respectively. The output end of the first branch circuit is connected to the input end of the first radiator. The first branch circuit includes a second heat exchanger and a third electrically controlled valve. The second heat exchanger is located on the cabin and is used to exchange heat with the air inside or entering the cabin. The third electrically controlled valve is used to control the passage or disconnection of the first branch circuit.

[0012] As a further embodiment of the present invention, the third heat dissipation circuit further includes a flow path controller, the first end of which is connected to the input end of the first radiator, the second end of which is connected to the input end of the first water pump, and the third end of which is connected to the output end of the engine cooling module and the output end of the first branch respectively. The flow path controller is used to switchably conduct its third end relative to the first end or the second end.

[0013] As a further embodiment of the present invention, the first heat dissipation circuit further includes a second water pump and a second radiator; the output end of the second water pump is respectively connected to the input end of the hydraulic heat dissipation module and the input end of the battery heat dissipation module; the output end of the hydraulic heat dissipation module and the output end of the battery heat dissipation module are connected to the input end of the second radiator; the output end of the second radiator is connected to the input end of the second water pump, and the second radiator is an air-cooled radiator.

[0014] As a further embodiment of the present invention, the first heat dissipation circuit further includes a first flow valve, a second flow valve, a first temperature sensor, a second temperature sensor, and a third temperature sensor; the first flow valve, the hydraulic heat dissipation module, and the first temperature sensor are sequentially connected to form a second branch, the input end of the second branch is connected to the output end of the second water pump, and the output end of the second branch is connected to the input end of the second radiator; the second flow valve, the battery heat dissipation module, and the second temperature sensor are sequentially connected to form a third branch, the input end of the third branch is connected to the output end of the second water pump, and the output end of the third branch is connected to the input end of the second radiator; the third temperature sensor is disposed between the second radiator and the second water pump.

[0015] As a further embodiment of the present invention, the motor heat dissipation unit includes a left travel motor heat dissipation module, a right travel motor heat dissipation module, a left mining head motor heat dissipation module, a right mining head motor heat dissipation module, a generator heat dissipation module, and a fan motor heat dissipation module; the electronic control heat dissipation unit includes a left travel electronic control heat dissipation module, a right travel electronic control heat dissipation module, a left mining head electronic control heat dissipation module, a right mining head electronic control heat dissipation module, a generator electronic control heat dissipation module, and a fan electronic control heat dissipation module; the output terminal of the left travel electronic control heat dissipation module is connected to the input terminal of the left travel motor heat dissipation module to form a fourth branch; the output terminal of the right travel electronic control heat dissipation module is connected to... The input terminal of the right drive motor cooling module is connected to form the fifth branch; the output terminal of the left mining head electrical control cooling module is connected to the input terminal of the left mining head motor cooling module to form the sixth branch; the output terminal of the right mining head electrical control cooling module is connected to the input terminal of the right mining head motor cooling module to form the seventh branch; the output terminal of the generator electrical control cooling module is connected to the input terminal of the generator cooling module to form the eighth branch; the output terminal of the fan electrical control cooling module is connected to the input terminal of the fan motor cooling module to form the ninth branch; the fourth, fifth, sixth, seventh, eighth, and ninth branches are connected in parallel with each other.

[0016] As a further embodiment of the present invention, the second heat dissipation circuit further includes a third water pump, a third flow valve, a fourth flow valve, a fifth flow valve, and a sixth flow valve; the output end of the third water pump is respectively connected to the input ends of the third flow valve, the fourth flow valve, the fifth flow valve, and the sixth flow valve; the output end of the third flow valve is connected to the input end of the left-side driving electronic control heat dissipation module, the output end of the fourth flow valve is connected to the input end of the right-side driving electronic control heat dissipation module, and the output end of the fifth flow valve is respectively connected to the left-side head electronic control heat dissipation module. The input terminals of the module, the right mining head electric control heat dissipation module, and the generator electric control heat dissipation module are connected. The output terminal of the sixth flow valve is connected to the input terminal of the fan electric control heat dissipation module. The output terminals of the left travel motor heat dissipation module, the right travel motor heat dissipation module, the left mining head motor heat dissipation module, the right mining head motor heat dissipation module, the generator heat dissipation module, and the fan motor heat dissipation module are all connected to the third end of the first heat exchanger. The fourth end of the first heat exchanger is connected to the input terminal of the third water pump. The first and second ends of the first heat exchanger are connected, and the third and fourth ends are connected.

[0017] As a further embodiment of the present invention, the second heat dissipation circuit further includes a fourth temperature sensor, a fifth temperature sensor and a sixth temperature sensor. The fourth temperature sensor is located at the output end of the left drive motor heat dissipation module, the fifth temperature sensor is located at the output end of the right drive motor heat dissipation module, and the sixth temperature sensor is located between the first heat exchanger and the third water pump.

[0018] A range-extended cotton harvester includes the aforementioned range-extended cotton harvester thermal management system.

[0019] The present invention has the following beneficial effects:

[0020] This system addresses the varying heat dissipation requirements of different heat dissipation modules and units. Hydraulic and battery heat dissipation modules, with lower heat dissipation requirements, are cooled via a first heat dissipation circuit. Motor and electronic control units, with higher heat dissipation requirements, are cooled via a second heat dissipation circuit. This separation of high- and low-heat-requiring components simplifies the overall thermal management system, making component arrangement easier and reducing overall system size. It also ensures a more rational overall thermal management system, avoiding either excessive or insufficient heat dissipation. Simultaneously, the compressor, condenser, and expansion valve unit cool the cooling medium in the first refrigeration circuit. The second heat dissipation circuit exchanges heat with the refrigeration circuit via a first heat exchanger, cooling the cooling medium in the second heat dissipation circuit and improving its heat dissipation effect. This ensures that even under extreme conditions, the second heat dissipation circuit can maintain the motor and electronic control units within a safe temperature range, preventing overheating that could lead to reduced power, damage, or shortened lifespan.

[0021] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the thermal management system in this invention;

[0024] Figure 2 This is a schematic diagram of the cooling circuit and the third heat dissipation circuit in this invention;

[0025] Figure 3 This is a schematic diagram of the first heat dissipation circuit structure in this invention;

[0026] Figure 4 This is a schematic diagram of the second heat dissipation circuit structure in this invention.

[0027] Legend:

[0028] 1. Hydraulic cooling module; 2. Battery cooling module; 3. Compressor; 4. Condenser; 5. Evaporator; 6. First heat exchanger; 7. First electronically controlled valve; 8. Second electronically controlled valve; 9. First expansion valve; 10. Second expansion valve; 11. First radiator; 12. First water pump; 13. Engine cooling module; 14. Second heat exchanger; 15. Third electronically controlled valve; 16. Flow path controller; 17. Second water pump; 18. Second radiator; 19. First flow valve; 20. Second flow valve; 21. First temperature sensor; 22. Second temperature sensor; 23. Third temperature sensor; 24. Left drive motor cooling module 25. Right drive motor cooling module; 26. Left head motor cooling module; 27. Right head motor cooling module; 28. Generator cooling module; 29. ​​Fan motor cooling module; 30. Left drive electronic control cooling module; 31. Right drive electronic control cooling module; 32. Left head electronic control cooling module; 34. Generator electronic control cooling module; 35. Fan electronic control cooling module; 36. Third water pump; 37. Third flow valve; 38. Fourth flow valve; 39. Fifth flow valve; 40. Sixth flow valve; 41. Fourth temperature sensor; 42. Fifth temperature sensor; 43. Sixth temperature sensor; 44. Expansion tank. Detailed Implementation

[0029] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0030] Please see Figure 1-4 The present invention provides a technical solution: a range-extended cotton harvester thermal management system, including a first heat dissipation circuit, a second heat dissipation circuit and a refrigeration circuit. The first heat dissipation circuit includes a hydraulic heat dissipation module 1 for installation on a hydraulic device and a battery heat dissipation module 2 for installation on a battery device. The second heat dissipation circuit includes a motor heat dissipation unit for installation on a motor device and an electronic control heat dissipation unit for installation on an electronic control device. The refrigeration circuit includes a heat exchange module, a compressor 3, a condenser 4 and an expansion valve unit connected in sequence.

[0031] The hydraulic device is cooled by the hydraulic cooling module 1, the battery device is cooled by the battery cooling module 2, the motor device is cooled by the motor cooling unit, and the electronic control device is cooled by the electronic control cooling unit.

[0032] The heat exchange module includes an evaporator 5 and a first heat exchanger 6 connected in parallel. The evaporator 5 is located on the cabin and is used to exchange heat with the air inside or entering the cabin. The first heat exchanger 6 is located in the second heat dissipation circuit and is used to exchange heat with the cooling medium in the second heat dissipation circuit. The evaporator 5 exchanges heat with the air inside or entering the cabin to achieve cooling in the cabin. At the same time, the first heat exchanger 6 can also exchange heat with the cooling medium in the second heat dissipation circuit to achieve cooling of the cooling medium in the second heat dissipation circuit.

[0033] During operation, the range-extended cotton harvester is driven by an electric motor for both travel and harvesting. Therefore, the motor and electronic control units have high heat dissipation requirements. The hydraulic system is only used for auxiliary actions such as raising and lowering the harvester head, so its heat dissipation requirements are relatively low. The battery system also has low heat dissipation requirements due to its smaller battery capacity. Therefore, the hydraulic cooling module 1 and the battery cooling module 2 are located in the first heat dissipation circuit. The cooling medium in the first heat dissipation circuit enters the hydraulic cooling module 1 and the battery cooling module 2 to dissipate heat from the hydraulic system and the battery system. The motor cooling unit and the electronic control unit are located in the second heat dissipation circuit, which is connected to the first heat exchanger 6. At the same time, a refrigeration circuit is connected to the first heat exchanger 6, and the refrigeration circuit dissipates heat to the first heat exchanger. 6. The cooling medium circulating in the second heat dissipation circuit exchanges heat with the cooling medium in the refrigeration circuit when it passes through the first heat exchanger 6, thereby cooling down the cooling medium in the second heat dissipation circuit. Then, the cooling medium in the second heat dissipation circuit enters the motor heat dissipation unit and the electronic control heat dissipation unit to dissipate heat from the motor and the electronic control unit. The low-temperature cooling medium in the refrigeration circuit exchanges heat with the cooling medium in the second heat dissipation circuit through the first heat exchanger 6, thereby achieving efficient cooling down of the cooling medium in the second heat dissipation circuit. This ensures that the motor heat dissipation unit and the electronic control heat dissipation unit are kept at a suitable temperature during driving and operation, preventing the motor or electronic control unit from experiencing power reduction or damage due to excessive temperature.

[0034] This system addresses the varying heat dissipation requirements of different heat dissipation modules and units. The hydraulic heat dissipation module 1 and battery heat dissipation module 2, with lower heat dissipation requirements, are cooled via a first heat dissipation circuit. The motor heat dissipation unit and electronic control heat dissipation unit, with higher heat dissipation requirements, are cooled via a second heat dissipation circuit. This separation of high- and low-heat-reduction components simplifies the overall thermal management system, making its layout easier and reducing the overall size of the machine. It also ensures a more rational overall thermal management system, preventing either excessive or insufficient heat dissipation. Simultaneously, the compressor 3, condenser 4, and expansion valve unit cool the cooling medium in the first refrigeration circuit. The second heat dissipation circuit exchanges heat with the refrigeration circuit via the first heat exchanger 6, cooling the cooling medium in the second heat dissipation circuit and improving its heat dissipation effect. This ensures that even under extreme conditions, the second heat dissipation circuit can maintain the motor and electronic control heat dissipation units within a safe temperature range, preventing overheating that could lead to reduced power, damage, or shortened lifespan.

[0035] Figure 2 An example of a refrigeration circuit is disclosed. In this example, the refrigeration circuit further includes a first electrically controlled valve 7 and a second electrically controlled valve 8. The expansion valve unit includes a first expansion valve 9 and a second expansion valve 10. The input end of the first expansion valve 9 is connected to the output end of the condenser 4, and the output end of the first expansion valve 9 is connected to the input end of the evaporator 5. The output end of the evaporator 5 is connected to the input end of the first electrically controlled valve 7, and the output end of the first electrically controlled valve 7 is connected to the input end of the compressor 3. The input end of the second expansion valve 10 is connected to the output end of the condenser 4, and the output end of the second expansion valve 10 is connected to the first end of the first heat exchanger 6. The second end of the first heat exchanger 6 is connected to the input end of the second electrically controlled valve 8, and the output end of the second electrically controlled valve 8 is connected to the input end of the compressor 3. The output end of the compressor 3 is connected to the input end of the condenser 4.

[0036] In this example, evaporator 5 is connected in parallel with the first heat exchanger 6, and a first expansion valve 9 and a first electrically controlled valve 7 are installed on the branch where evaporator 5 is located. The first expansion valve 9 is used to throttle and reduce pressure, regulating the flow rate of the cooling medium entering evaporator 5. The first electrically controlled valve 7 is used to control the branch where evaporator 5 is located to be open or closed. A second expansion valve 10 and a second electrically controlled valve 8 are installed on the branch where the first heat exchanger 6 is located. The second expansion valve 10 is used to throttle and reduce pressure, regulating the flow rate of the cooling medium entering the first heat exchanger 6. The second electrically controlled valve 8 is used to control the flow rate of the cooling medium entering the first heat exchanger 6. The branch circuit where the first heat exchanger 6 is located can be opened or closed. The first solenoid valve 7 and the second solenoid valve 8 can control the cooling medium in the refrigeration circuit to enter the evaporator 5 and / or the first heat exchanger 6. The evaporator 5 can be used alone, the first heat exchanger 6 can be used alone, or the evaporator 5 and the first heat exchanger 6 can be used together to cope with different working conditions. At the same time, the temperature of the cooling medium entering the evaporator 5 and the first heat exchanger 6 can be controlled separately and do not affect each other, which can improve the comfort of the cabin temperature and ensure the heat dissipation effect of the refrigeration circuit on the second heat dissipation circuit.

[0037] Specifically, the refrigeration path of the evaporator 5 in the refrigeration circuit is: compressor 3 → condenser 4 → first expansion valve 9 → evaporator 5 → first electronic control valve 7 → compressor 3;

[0038] Specifically, the refrigeration path of the first heat exchanger 6 in the refrigeration circuit is: compressor 3 → condenser 4 → second expansion valve 10 → first heat exchanger 6 → first electronic control valve 7 → compressor 3;

[0039] Specifically, the flow of the cooling medium in the refrigeration circuit is driven by the compressor 3, forming a closed loop in the refrigeration circuit;

[0040] Specifically, the refrigeration principle of the refrigeration circuit is a conventional technique in this field, and will not be elaborated upon in this application.

[0041] Furthermore, such as Figure 2 As shown, the thermal management system of the range-extended cotton harvester also includes a third heat dissipation circuit, which includes a first radiator 11, a first water pump 12, an engine cooling module 13, and a first branch circuit. The output end of the first radiator 11 is connected to the input end of the first water pump 12. The output end of the first water pump 12 is connected to the input end of the engine cooling module 13. The engine cooling module 13 is installed on the engine to dissipate heat from the engine. The output end of the engine cooling module 13 is connected to the input end of the first radiator 11 and the input end of the first branch circuit, respectively. The output end of the first branch circuit is connected to the input end of the first radiator 11. The first branch circuit includes a second heat exchanger 14 and a third electronically controlled valve 15. The second heat exchanger 14 is installed on the cabin and is used to exchange heat with the air in or entering the cabin. The third electronically controlled valve 15 is used to control the opening or closing of the first branch circuit.

[0042] The high-temperature cooling medium discharged from the output end of the engine cooling module 13 can directly return to the first radiator 11 for cooling circulation, or enter the input end of the second heat exchanger 14 and then enter the first radiator 11 from the output end of the second heat exchanger 14 for cooling circulation. When the cabin needs heating, the first branch is opened through the third electronic control valve 15. At this time, the high-temperature cooling medium discharged from the output end of the engine cooling module 13 will enter the second heat exchanger 14. The second heat exchanger 14 is installed on the cabin to heat the air in or entering the cabin, thereby achieving cabin heating. The cabin is heated by the high-temperature cooling medium discharged from the engine cooling module 13, making full use of the engine's waste heat, while not affecting the cooling of the refrigeration circuit. In winter, when the cabin needs heating and the motor cooling unit and the electronic control cooling unit need to dissipate heat, the two do not affect each other.

[0043] Specifically, the heat dissipation medium flow path of the engine cooling module 13 in the third heat dissipation circuit is: first water pump 12 → engine cooling module 13 → first radiator 11 → first water pump 12;

[0044] Specifically, the heating path of the cabin in the third heat dissipation circuit is: first water pump 12 → engine cooling module 13 → second heat exchanger 14 → third electronic control valve 15 → first water pump 12.

[0045] Specifically, the flow of the cooling medium in the third heat dissipation circuit is driven by the first water pump 12, forming a closed loop in the third heat dissipation circuit;

[0046] Furthermore, such as Figure 2 As shown, an expansion tank 44 is connected in the third heat dissipation circuit. The expansion tank 44 is used to accommodate the volume of the cooling medium in the third heat dissipation circuit after it is heated and expanded.

[0047] like Figure 2 As shown, the third heat dissipation circuit further includes a flow path controller 16. The first end of the flow path controller 16 is connected to the input end of the first radiator 11, the second end of the flow path controller 16 is connected to the input end of the first water pump 12, and the third end of the flow path controller 16 is connected to the output end of the engine cooling module 13 and the output end of the first branch respectively. The flow path controller 16 is used to switch its third end to be connected relative to the first end or the second end.

[0048] In the range-extended cotton harvester, the engine is the power source of the whole vehicle. When the required heat dissipation efficiency of the engine cooling module 13 is high, the first and third terminals of the flow path controller 16 are turned on, and the cooling medium discharged from the first branch or the engine cooling module 13 enters the first radiator 11 for heat dissipation. Then it is discharged from the first radiator 11 into the second water pump 17 to realize the large circulation of the cooling medium in the third heat dissipation circuit. When the engine is running at a lower power, the heat dissipation demand of the engine is small, and the second and third terminals of the flow path controller 16 can be turned on. At this time, the cooling medium discharged from the first branch or the engine cooling module 13 will return directly to the first water pump 12 without passing through the first radiator 11 for heat dissipation, which can reduce the power consumption of the whole machine.

[0049] Specifically, the flow path controller 16 can be a multi-way valve (such as a three-way valve or two two-way valves) or a thermostat.

[0050] like Figure 3 As shown, specifically, the first heat dissipation circuit also includes a second water pump 17 and a second radiator 18; the output end of the second water pump 17 is connected to the input end of the hydraulic heat dissipation module 1 and the input end of the battery heat dissipation module 2 respectively; the output end of the hydraulic heat dissipation module 1 and the output end of the battery heat dissipation module 2 are connected to the input end of the second radiator 18; the output end of the second radiator 18 is connected to the input end of the second water pump 17.

[0051] The cooling medium is driven by the second water pump 17 to circulate in the first heat dissipation circuit, so that the cooling medium in the first heat dissipation circuit enters the hydraulic heat dissipation module 1 and the battery heat dissipation module 2 respectively, thereby absorbing the heat generated by the hydraulic heat dissipation module 1 and the battery heat dissipation module 2. Then, it is discharged from the hydraulic heat dissipation module 1 and the battery heat dissipation module 2 and enters the second radiator 18. The second radiator 18 cools the cooling medium. Finally, it returns to the second water pump 17 and dissipates the cooling medium in the first heat dissipation circuit through the second radiator 18. The heat dissipation efficiency of the first heat dissipation circuit can be controlled independently. The second radiator 18 with low heat dissipation efficiency can be used, which is more energy-saving and easier to control.

[0052] Specifically, the second radiator 18 is an air-cooled radiator, which is more energy-efficient and environmentally friendly;

[0053] like Figure 3As shown, the first heat dissipation circuit further includes a first flow valve 19, a second flow valve 20, a first temperature sensor 21, a second temperature sensor 22, and a third temperature sensor 23; the first flow valve 19, the hydraulic heat dissipation module 1, and the first temperature sensor 21 are connected in sequence to form a second branch, the input end of the second branch is connected to the output end of the second water pump 17, and the output end of the second branch is connected to the input end of the second radiator 18; the second flow valve 20, the battery heat dissipation module 2, and the second temperature sensor 22 are connected in sequence to form a third branch, the input end of the third branch is connected to the output end of the second water pump 17, and the output end of the third branch is connected to the input end of the second radiator 18;

[0054] After the cooling medium is discharged from the hydraulic cooling module 1 and the battery cooling module 2, the first temperature sensor 21 and the second temperature sensor 22 will detect the temperature of the two cooling media respectively. The opening of the first flow valve 19 and the second flow valve 20 can be adjusted according to the temperature measurement results of the first temperature sensor 21 and the second temperature sensor 22, thereby adjusting the flow rate of the cooling medium flowing through the hydraulic cooling module 1 and the battery cooling module 2, so as to adjust the heat dissipation efficiency of the hydraulic cooling module 1 and the battery cooling module 2 respectively, preventing the heat dissipation efficiency of the hydraulic cooling module 1 or the battery cooling module 2 from being excessive, and improving the energy efficiency ratio of the first heat dissipation circuit.

[0055] For example, during driving, the battery in the battery cooling module 2 provides power to the motor cooling unit. At this time, the battery cooling module 2 generates heat, while the hydraulic cooling module 1 does not work and therefore does not generate heat. At this time, the second branch can be completely disconnected by the second flow valve 20, so that the cooling medium flows only through the third branch, thereby achieving heat dissipation of the battery cooling module 2.

[0056] Specifically, the heat dissipation medium flow path of the hydraulic heat dissipation module 1 in the first heat dissipation circuit is: second water pump 17 → first flow valve 19 → hydraulic heat dissipation module 1 → first temperature sensor 21 → second radiator 18 → second water pump 17.

[0057] Specifically, the heat dissipation medium flow path of the battery heat dissipation module 2 in the first heat dissipation circuit is: second water pump 17 → second flow valve 20 → battery heat dissipation module 2 → second temperature sensor 22 → second radiator 18 → second water pump 17.

[0058] like Figure 3As shown, a third temperature sensor 23 is further disposed between the second radiator 18 and the second water pump 17. The cooling medium discharged from the second radiator 18 passes through the third temperature sensor 23 before entering the second water pump 17. The temperature measurement result of the third temperature sensor 23 determines whether the overall heat dissipation efficiency of the first heat dissipation module meets the heat dissipation requirements of the hydraulic heat dissipation module 1 and the battery heat dissipation module 2. If the temperature measurement result of the third temperature sensor 23 exceeds the set temperature range, it means that the current heat dissipation efficiency of the second radiator 18 is too low and the heat dissipation efficiency of the second radiator 18 needs to be increased to ensure the safe use of the hydraulic heat dissipation module 1 and the battery heat dissipation module 2. If the temperature measurement result of the third temperature sensor 23 is lower than the set temperature range, it means that the current heat dissipation efficiency of the second radiator 18 is too high and the heat dissipation efficiency of the second radiator 18 can be reduced to achieve the effect of energy saving.

[0059] like Figure 4 As shown, specifically, the motor cooling unit includes a left travel motor cooling module 24, a right travel motor cooling module 25, a left mining head motor cooling module 26, a right mining head motor cooling module 27, a generator cooling module 28, and a fan motor cooling module 29; the electronic control cooling unit includes a left travel electronic control cooling module 30, a right travel electronic control cooling module 31, a left mining head electronic control cooling module 32, a right mining head electronic control cooling module 33, a generator electronic control cooling module 34, and a fan electronic control cooling module 35.

[0060] The left drive motor cooling module 24, the left drive electronic control cooling module 30, the right drive motor cooling module 25, and the right drive electronic control cooling module 31 provide driving force for the movement of the whole machine. The left head motor cooling module 26, the left head electronic control cooling module 32, the right head motor cooling module 27, the right head electronic control cooling module 33, the fan motor cooling module 29, and the fan electronic control cooling module 35 are used for harvesting by the whole machine. The generator cooling module 28 and the generator electronic control cooling module 34 are used to convert the kinetic energy output by the engine into electrical energy.

[0061] The output of the left driving electronic cooling module 30 is connected to the input of the left driving motor cooling module 24 to form the fourth branch; the output of the right driving electronic cooling module 31 is connected to the input of the right driving electronic cooling module 31 to form the fifth branch; the output of the left mining head electronic cooling module 32 is connected to the input of the left mining head motor cooling module 26 to form the sixth branch; the output of the right mining head electronic cooling module 33 is connected to the input of the right mining head motor cooling module 27 to form the seventh branch; the output of the generator electronic cooling module 34 is connected to the input of the generator cooling module 28 to form the eighth branch; the output of the fan electronic cooling module 35... The output end is connected to the input end of the fan motor heat dissipation module 29 to form the ninth branch; the fourth, fifth, sixth, seventh, eighth and ninth branches are connected in parallel to each other, and the heat dissipation modules of different motors are connected in series with the corresponding electronic control heat dissipation modules to form branches. Then the branches formed by the heat dissipation modules of different motors and the electronic control heat dissipation modules are connected in parallel to prevent mutual influence between different branches. For some working conditions that may lead to an increase in the power consumption and heat generation of certain motors, it can prevent the heat dissipation modules from affecting other branches and reduce the impact of the heat dissipation modules of motors or electronic control heat dissipation modules on the overall second heat dissipation circuit under certain extreme working conditions.

[0062] like Figure 4 As shown, specifically, the second heat dissipation circuit also includes a third water pump 36, a third flow valve 37, a fourth flow valve 38, a fifth flow valve 39, and a sixth flow valve 40; the output end of the third water pump 36 is connected to the input ends of the third flow valve 37, the fourth flow valve 38, the fifth flow valve 39, and the sixth flow valve 40, respectively; the output end of the third flow valve 37 is connected to the input end of the left driving electronic control heat dissipation module 30, the output end of the fourth flow valve 38 is connected to the input end of the right driving electronic control heat dissipation module 31, and the output end of the fifth flow valve 39 is connected to the left mining head electronic control... The input terminals of the heat dissipation module 32, the right mining head electric control heat dissipation module 33, and the generator electric control heat dissipation module 34 are connected to the input terminal of the fan electric control heat dissipation module 35. The output terminals of the left travel motor, the right travel motor, the left mining head motor, the right mining head motor, the generator heat dissipation module 28, and the fan motor are all connected to the third terminal of the first heat exchanger 6. The fourth terminal of the first heat exchanger 6 is connected to the input terminal of the third water pump 36. The first and second terminals of the first heat exchanger 6 are connected, and the third and fourth terminals are connected.

[0063] The cooling medium flow rate of the fourth branch can be adjusted by the third flow valve 37, the cooling medium flow rate of the fifth branch can be adjusted by the fourth flow valve 38, the cooling medium flow rate of the sixth, seventh and eighth branches can be adjusted by the fifth flow valve 39, and the cooling medium flow rate of the ninth branch can be adjusted by the sixth flow valve 40. The cooling medium flow rate of different branches can be adjusted according to different working conditions, making full use of the heat dissipation effect of the cooling medium, improving the energy efficiency of the thermal management system, and avoiding unnecessary waste of cooling medium.

[0064] The left mining head motor, the right mining head motor, and the generator operate synchronously. Therefore, the heat generation of the left mining head motor heat dissipation module 26, the left mining head electrical control heat dissipation module 32, the right mining head motor heat dissipation module 27, the right mining head electrical control heat dissipation module 33, the generator heat dissipation module 28, and the generator electrical control heat dissipation module 34 is not much different, and their heat dissipation requirements are also similar. As a result, the sixth branch, the seventh branch, and the eighth branch are controlled by the same fifth flow valve 39, reducing the complexity of the thermal management system.

[0065] During harvesting, the left and right drive motors operate at low power or are stopped. At this time, the heat dissipation requirements of the left drive motor cooling module 24 and the right drive motor cooling module 25 are low. The opening of the third flow valve 37 and the fourth flow valve 38 can be reduced to reduce the cooling medium flow of the fourth and fifth branches. Meanwhile, the left head motor, the right head motor, and the fan motor are operating at high power. The opening of the fifth flow valve 39 can be increased to increase the cooling medium flow of the sixth, seventh, and eighth branches, allowing more cooling medium to flow to the sixth, seventh, and eighth branches.

[0066] Under driving conditions, the left drive motor and the right drive motor maintain high power operation. At this time, the heat generated by the left drive motor heat dissipation module 24 and the right drive motor heat dissipation module 25 is relatively large, and the heat dissipation demand will also increase accordingly. The opening of the third flow valve 37 and the fourth flow valve 38 can be increased to increase the flow of the cooling medium in the fourth branch and the fifth branch, so that more cooling medium can enter the fourth branch and the fifth branch.

[0067] The first and second ends of the first heat exchanger 6 are connected, and the third and fourth ends are connected, so that the cooling medium in the refrigeration circuit and the cooling medium in the second heat dissipation circuit can flow through the first heat exchanger 6 and exchange heat.

[0068] like Figure 4 As shown, the second heat dissipation circuit further includes a fourth temperature sensor 41, a fifth temperature sensor 42 and a sixth temperature sensor 43. The fourth temperature sensor 41 is located at the output end of the left drive motor heat dissipation module 24, the fifth temperature sensor 42 is located at the output end of the right drive motor heat dissipation module 25, and the sixth temperature sensor 43 is located between the first heat exchanger 6 and the third water pump 36.

[0069] The fourth temperature sensor 41 and the fifth temperature sensor 42 monitor the cooling medium temperature at the output terminals of the left drive motor cooling module 24 and the right drive motor cooling module 25, respectively. Based on the temperature measurement results, the third flow valve 37 and the fourth flow valve 38 are adjusted to regulate the cooling medium flow rate of the fourth and fifth branches. During harvesting or driving operations, since the planting environment is mostly located in mountainous areas, it is inevitable that there will be situations where the machine needs to get out of trouble. At this time, the driving wheels of the whole machine may be suspended in the air, and the whole machine needs to be driven out of trouble by the driving wheels that are not suspended in the air. At this time, the left or right drive motor needs to operate at extremely high power to get the whole machine out of trouble. The drive motor used to drive the whole machine will generate a great deal of power. The heat can be redistributed based on the temperature measurement results of the fourth temperature sensor 41 and the fifth temperature sensor 42, allowing more cooling medium to enter the high-power driving motor heat dissipation module, which can be the left driving motor heat dissipation module 24 or the right driving motor heat dissipation module 25. This ensures that the left or right driving motor can provide the necessary driving force for the whole machine to get out of trouble, while ensuring that the temperature of the left driving motor heat dissipation module 24 and the left driving electric control heat dissipation module 30 or the right driving motor heat dissipation module 25 and the right driving electric control heat dissipation module 31 remains within a safe range during the process of getting out of trouble, preventing the left driving motor, the left driving motor electric control, the right driving motor or the right driving motor electric control from being damaged due to excessive temperature.

[0070] The sixth temperature sensor 43 is used to monitor the temperature of the cooling medium discharged from the fourth end of the first heat exchanger 6, thereby determining whether the overall heat dissipation efficiency of the second heat dissipation circuit meets the requirements, and thus adjusting the cooling efficiency of the second expansion valve.

[0071] Specifically, the heat dissipation medium flow path of the left driving motor heat dissipation module 24 and the left driving electronic control heat dissipation module 30 in the second heat dissipation circuit is as follows: third water pump 36 → third flow valve 37 → left driving electronic control heat dissipation module 30 → left driving motor heat dissipation module 24 → fourth temperature sensor 41 → first heat exchanger 6 → sixth temperature sensor 43 → third water pump 36.

[0072] Specifically, the heat dissipation medium flow path of the right drive motor heat dissipation module 25 and the right drive electronic control heat dissipation module 31 in the second heat dissipation circuit is as follows: third water pump 36 → fourth flow valve 38 → right drive electronic control heat dissipation module 31 → right drive motor heat dissipation module 25 → fifth temperature sensor 42 → first heat exchanger 6 → sixth temperature sensor 43 → third water pump 36.

[0073] Specifically, the heat dissipation medium flow path of the left mining head motor heat dissipation module 26 and the left mining head electrical control heat dissipation module 32 in the second heat dissipation circuit is as follows: third water pump 36 → fifth flow valve 39 → left mining head electrical control heat dissipation module 32 → left mining head motor heat dissipation module 26 → first heat exchanger 6 → sixth temperature sensor 43 → third water pump 36.

[0074] Specifically, the heat dissipation medium flow path of the right mining head motor heat dissipation module 27 and the right mining head electrical control heat dissipation module 33 in the second heat dissipation circuit is as follows: third water pump 36 → fifth flow valve 39 → right mining head electrical control heat dissipation module 33 → right mining head motor heat dissipation module 27 → first heat exchanger 6 → sixth temperature sensor 43 → third water pump 36.

[0075] Specifically, the heat dissipation medium flow path of the fan motor heat dissipation module 29 and the fan electronic control heat dissipation module 35 in the second heat dissipation circuit is as follows: third water pump 36 → fifth flow valve 39 → generator electronic control heat dissipation module 34 → generator heat dissipation module 28 → first heat exchanger 6 → sixth temperature sensor 43 → third water pump 36.

[0076] Specifically, the heat dissipation medium flow path of the generator heat dissipation module 28 and the generator electronic control heat dissipation module 34 in the second heat dissipation circuit is as follows: third water pump 36 → sixth flow valve 40 → fan electronic control heat dissipation module 35 → fan motor heat dissipation module 29 → first heat exchanger 6 → sixth temperature sensor 43 → third water pump 36.

[0077] Furthermore, such as Figure 1 As shown, both the first heat dissipation circuit and the second heat dissipation circuit are connected to an expansion tank 44, which is used to accommodate the volume of the cooling medium in the first heat dissipation circuit and the second heat dissipation circuit after it expands due to heat.

[0078] A range-extended cotton harvester includes the aforementioned range-extended cotton harvester thermal management system.

[0079] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A range extender cotton picker thermal management system, characterized by: It includes a first heat dissipation circuit, a second heat dissipation circuit and a refrigeration circuit. The first heat dissipation circuit includes a hydraulic heat dissipation module (1) for installation on a hydraulic device and a battery heat dissipation module (2) for installation on a battery device. The second heat dissipation circuit includes a motor heat dissipation unit for installation on a motor device and an electronic control heat dissipation unit for installation on an electronic control device. The refrigeration circuit includes a heat exchange module, a compressor (3), a condenser (4) and an expansion valve unit connected in sequence. The heat exchange module includes an evaporator (5) connected in parallel and a first heat exchanger (6). The evaporator (5) is used to exchange heat with the air inside the cabin or entering the cabin, and the first heat exchanger (6) is located in the second heat dissipation circuit and is used to exchange heat with the cooling medium in the second heat dissipation circuit. The refrigeration circuit also includes a first electrically controlled valve (7) and a second electrically controlled valve (8), and the expansion valve unit includes a first expansion valve (9) and a second expansion valve (10). The input end of the first expansion valve (9) is connected to the output end of the condenser (4), the output end of the first expansion valve (9) is connected to the input end of the evaporator (5), the output end of the evaporator (5) is connected to the input end of the first electric control valve (7), and the output end of the first electric control valve (7) is connected to the input end of the compressor (3). The input end of the second expansion valve (10) is connected to the output end of the condenser (4), the output end of the second expansion valve (10) is connected to the first end of the first heat exchanger (6), the second end of the first heat exchanger (6) is connected to the input end of the second electric control valve (8), and the output end of the second electric control valve (8) is connected to the input end of the compressor (3). The output end of the compressor (3) is connected to the input end of the condenser (4); The first heat dissipation circuit also includes a second water pump (17) and a second radiator (18). The output end of the second water pump (17) is connected to the input end of the hydraulic heat dissipation module (1) and the input end of the battery heat dissipation module (2), respectively; The output end of the hydraulic cooling module (1) and the output end of the battery cooling module (2) are connected to the input end of the second radiator (18); The output end of the second radiator (18) is connected to the input end of the second water pump (17), and the second radiator (18) is an air-cooled radiator; The first heat dissipation circuit also includes a first flow valve (19), a second flow valve (20), a first temperature sensor (21), a second temperature sensor (22), and a third temperature sensor (23). The first flow valve (19), the hydraulic heat dissipation module (1) and the first temperature sensor (21) are connected in sequence to form a second branch. The input end of the second branch is connected to the output end of the second water pump (17), and the output end of the second branch is connected to the input end of the second radiator (18). The second flow valve (20), the battery heat dissipation module (2) and the second temperature sensor (22) are connected in sequence to form a third branch. The input end of the third branch is connected to the output end of the second water pump (17), and the output end of the third branch is connected to the input end of the second radiator (18). The third temperature sensor (23) is located between the second radiator (18) and the second water pump (17).

2. The thermal management system for a range extended cotton picker of claim 1, wherein: The range-extended cotton harvester thermal management system also includes a third heat dissipation circuit, which includes a first radiator (11), a first water pump (12), an engine heat dissipation module (13), and a first branch circuit. The output end of the first radiator (11) is connected to the input end of the first water pump (12); The output end of the first water pump (12) is connected to the input end of the engine cooling module (13); The engine cooling module (13) is used to be installed on the engine to cool the engine. The output end of the engine cooling module (13) is connected to the input end of the first radiator (11) and the input end of the first branch respectively. The output end of the first branch is connected to the input end of the first radiator (11). The first branch includes a second heat exchanger (14) and a third electric control valve (15). The second heat exchanger (14) is installed on the cabin for exchanging heat with the air in the cabin or entering the cabin. The third electric control valve (15) is used to control the passage or disconnection of the first branch.

3. The thermal management system for a range-extended cotton harvester according to claim 2, characterized in that: The third heat dissipation circuit also includes a flow path controller (16). The first end of the flow path controller (16) is connected to the input end of the first radiator (11), the second end of the flow path controller (16) is connected to the input end of the first water pump (12), and the third end of the flow path controller (16) is connected to the output end of the engine heat dissipation module (13) and the output end of the first branch respectively. The flow path controller (16) is used to switch its third end relative to the first end or the second end.

4. The thermal management system for a range-extended cotton harvester according to claim 1, characterized in that: The motor cooling unit includes a left driving motor cooling module (24), a right driving motor cooling module (25), a left mining head motor cooling module (26), a right mining head motor cooling module (27), a generator cooling module (28), and a fan motor cooling module (29). The electronically controlled heat dissipation unit includes a left driving electronically controlled heat dissipation module (30), a right driving electronically controlled heat dissipation module (31), a left mining head electronically controlled heat dissipation module (32), a right mining head electronically controlled heat dissipation module (33), a generator electronically controlled heat dissipation module (34), and a fan electronically controlled heat dissipation module (35). The output end of the left driving electric control heat dissipation module (30) is connected to the input end of the left driving motor heat dissipation module (24) to form a fourth branch; The output end of the right-hand drive electronic control heat dissipation module (31) is connected to the input end of the right-hand drive motor heat dissipation module (25) to form the fifth branch; The output end of the left mining head electrical control heat dissipation module (32) is connected to the input end of the left mining head motor heat dissipation module (26) to form the sixth branch; The output end of the right mining head electrical control heat dissipation module (33) is connected to the input end of the right mining head motor heat dissipation module (27) to form the seventh branch; The output terminal of the generator electronic control heat dissipation module (34) is connected to the input terminal of the generator heat dissipation module (28) to form the eighth branch; The output end of the fan electrical control heat dissipation module (35) is connected to the input end of the fan motor heat dissipation module (29) to form the ninth branch; The fourth, fifth, sixth, seventh, eighth, and ninth branches are connected in parallel.

5. The thermal management system for a range-extended cotton harvester according to claim 4, characterized in that: The second heat dissipation circuit also includes a third water pump (36), a third flow valve (37), a fourth flow valve (38), a fifth flow valve (39), and a sixth flow valve (40). The output end of the third water pump (36) is connected to the input end of the third flow valve (37), the input end of the fourth flow valve (38), the input end of the fifth flow valve (39), and the input end of the sixth flow valve (40), respectively. The output end of the third flow valve (37) is connected to the input end of the left driving electronic control heat dissipation module (30), the output end of the fourth flow valve (38) is connected to the input end of the right driving electronic control heat dissipation module (31), the output end of the fifth flow valve (39) is connected to the input end of the left mining head electronic control heat dissipation module (32), the input end of the right mining head electronic control heat dissipation module (33) and the input end of the generator electronic control heat dissipation module (34), respectively, and the output end of the sixth flow valve (40) is connected to the input end of the wind turbine electronic control heat dissipation module (35); The output ends of the left driving motor heat dissipation module (24), the right driving motor heat dissipation module (25), the left mining head motor heat dissipation module (26), the right mining head motor heat dissipation module (27), the generator heat dissipation module (28), and the fan motor heat dissipation module (29) are all connected to the third end of the first heat exchanger (6), and the fourth end of the first heat exchanger (6) is connected to the input end of the third water pump (36). The first and second ends of the first heat exchanger (6) are connected, and the third and fourth ends are connected.

6. The thermal management system for a range-extended cotton harvester according to claim 5, characterized in that: The second heat dissipation circuit also includes a fourth temperature sensor (41), a fifth temperature sensor (42) and a sixth temperature sensor (43). The fourth temperature sensor (41) is located at the output end of the left drive motor heat dissipation module (24), the fifth temperature sensor (42) is located at the output end of the right drive motor heat dissipation module (25), and the sixth temperature sensor (43) is located between the first heat exchanger (6) and the third water pump (36).

7. A range-extended cotton harvester, characterized in that: The range-extended cotton harvester thermal management system includes any one of claims 1-6.

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