Thermal management control system for cotton harvesters and range-extended electric cotton harvesters

Abstract

This utility model discloses a thermal management control system for cotton harvesters and a range-extended electric cotton harvester, including a refrigeration circuit, a cooling circuit, an engine coolant circuit, and a blower. The refrigeration circuit includes a main refrigeration line for refrigerant flow, a first heat exchange branch connected to the main refrigeration line for refrigerant heat exchange, and a second heat exchange branch connected to the main refrigeration line for refrigerant heat exchange. The cooling circuit exchanges heat with the refrigerant in the first heat exchange branch to cool the hydraulic system, battery pack, electronic control system, and motor system. The engine coolant circuit cools the engine coolant and exchanges heat with the engine. The blower is located between the second heat exchange branch and the engine coolant circuit, and exchanges heat with the refrigerant in the second heat exchange branch to deliver cold air to the cab, or exchanges heat with the engine coolant to deliver hot air to the cab. This solution has high integration, a compact and simple structure, high heat exchange efficiency, and high energy utilization.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery and equipment technology, and in particular, to a thermal management control system for cotton harvesters. Furthermore, this utility model also relates to a range-extended electric cotton harvester including the aforementioned thermal management control system. Background Technology

[0002] Cotton harvesters are mainly used for picking cotton. They are widely used because they can replace manual labor and significantly improve harvesting efficiency. Electric cotton harvesters, which reduce carbon emissions and align with the trend of green agricultural development, are becoming the future trend due to their simple structure, easy maintenance, and low failure rate. Currently, electric cotton harvesters are typically range-extended models. Their core technology uses a fuel engine to generate electricity to drive an electric motor, which simultaneously charges the battery, balancing the high efficiency and environmental friendliness of electrification with the range assurance of fuel. Overall fuel consumption is reduced by approximately 20% compared to pure fuel-powered models. In range-extended electric cotton harvesters, the walking, harvesting head, and fan movements are all driven by electric motors. Auxiliary actions such as harvesting head lifting are generally achieved using hydraulic systems, and a battery pack is provided to address range anxiety. Therefore, the thermal management of range-extended electric cotton harvesters mainly consists of five parts: cab cooling and heating, battery pack cooling, motor-electronic control system cooling, hydraulic system cooling, and engine cooling. Existing solutions typically manage these five parts separately or partially integrate them, resulting in low overall integration, a complex structure of the vehicle's thermal management control system, and low heat exchange efficiency. Utility Model Content

[0003] This utility model provides a thermal management control system for cotton harvesters and a range-extended electric cotton harvester to solve the technical problems of low integration, complex structure, and low heat exchange efficiency in the thermal management control systems of existing range-extended electric cotton harvesters.

[0004] According to one aspect of the present invention, a thermal management control system for a cotton harvester is provided, comprising a refrigeration circuit, a cooling circuit, an engine coolant circuit, and a blower. The refrigeration circuit includes a main refrigeration line for facilitating refrigerant flow, a first heat exchange branch connected to the main refrigeration line for heat exchange of the refrigerant, and a second heat exchange branch connected to the main refrigeration line for heat exchange of the refrigerant. The cooling circuit is used to exchange heat with the refrigerant in the first heat exchange branch to cool the hydraulic system, battery pack, electronic control system, and motor system. The engine coolant circuit is used to cool the engine coolant and exchange heat with the engine. The blower is disposed between the second heat exchange branch and the engine coolant circuit and is used to exchange heat with the refrigerant in the second heat exchange branch to deliver cold air to the cab, or to exchange heat with the engine coolant to deliver hot air to the cab.

[0005] As a further improvement to the above technical solution:

[0006] Furthermore, the cooling circuit includes a main cooling line connected to the heat exchange end of the first heat exchange branch for exchanging heat with the refrigerant and allowing the coolant to flow, a first cooling branch connected to the main cooling line for cooling the hydraulic system, a second cooling branch connected to the main cooling line for cooling the battery pack, and a third cooling branch connected to the main cooling line for cooling the motor system and the electronic control system.

[0007] Furthermore, the main cooling pipeline includes a cooling water pump, a delivery pipe connected to the heat exchange end of the first heat exchange branch and the input end of the cooling water pump, an expansion tank connected to the delivery pipe, and a return pipe connected to the heat exchange end of the first heat exchange branch, the output end of the first cooling branch, the output end of the second cooling branch, and the output end of the third cooling branch.

[0008] Furthermore, the first cooling branch includes a solenoid valve connected to the output end of the cooling water pump and a heat exchanger connected to the solenoid valve and the return pipe respectively for cooling the hydraulic system.

[0009] Furthermore, the second cooling branch includes a second solenoid valve connected to the output end of the cooling water pump, and a second heat exchanger connected to the second solenoid valve and the return pipe respectively for cooling the battery pack.

[0010] Furthermore, the third cooling branch includes a solenoid valve three connected to the output end of the cooling water pump, a heat exchanger three connected to the solenoid valve three for heat exchange and cooling of the electronic control system, and a heat exchanger four connected to the solenoid valve three and the return pipe respectively for heat exchange and cooling of the motor system.

[0011] Furthermore, the main refrigeration pipeline includes a compressor and a heat exchanger connected to the compressor for cooling the refrigerant.

[0012] Furthermore, the first heat exchange main circuit includes an expansion valve 1 connected to heat exchanger 5, a heat exchanger 6 connected to expansion valve 1 for heat exchange with the cooling circuit, and a solenoid valve 4 connected to heat exchanger 6 and compressor respectively. The heat exchange end of heat exchanger 6 is connected to the cooling circuit.

[0013] Furthermore, the second heat exchange branch includes an expansion valve 2 connected to heat exchanger 5, a heat exchanger 7 connected to expansion valve 2 for exchanging heat with the air around the blower, and a solenoid valve 5 connected to heat exchanger 7 and compressor respectively.

[0014] Furthermore, the engine coolant circuit includes a coolant cooling circuit for circulating and cooling the engine coolant, an expansion tank connected to the coolant cooling circuit, and a coolant heat exchange branch connected to the coolant cooling circuit for exchanging heat with the air around the blower.

[0015] Furthermore, the coolant cooling circuit includes a coolant water pump for pumping engine coolant, an engine water jacket connected to the coolant water pump for exchanging heat between the engine coolant and the engine, a heat exchanger 8 for dissipating heat from the coolant, connecting pipes connected to the coolant water pump and the heat exchanger 8 respectively, and a thermostat connected to the connecting pipes, the engine water jacket and the heat exchanger 8 respectively. The thermostat is used to change the flow direction of the engine coolant according to the heat load.

[0016] Furthermore, the coolant heat exchange branch includes a solenoid valve six connected to the coolant cooling circuit and a heat exchanger nine connected to the solenoid valve six and the coolant cooling circuit respectively for exchanging heat with the air around the blower.

[0017] According to another aspect of the present invention, a range-extended electric cotton harvester is also provided, which includes the above-mentioned thermal management control system for cotton harvesters.

[0018] This utility model has the following beneficial effects:

[0019] The thermal management control system for cotton harvesters of this utility model includes a refrigeration circuit where refrigerant flows through a main refrigeration line, and then exchanges heat between the refrigerant and the cooling circuit through a first heat exchange branch. This heat exchange coolings the hydraulic system, battery pack, electronic control system, and motor system, achieving heat dissipation for these systems. A second heat exchange branch allows the refrigerant to exchange heat with the air surrounding the blower, enabling the blower to deliver cool air to the cab, thus cooling the cab. The engine coolant circuit cools the engine coolant and exchanges heat between the coolant and the engine, achieving engine heat dissipation. Meanwhile, the heat absorbed by the engine coolant when cooling the engine can be exchanged through the blower to deliver hot air to the cab, thereby heating the cab and improving energy efficiency. This solution integrates cab cooling, cab heating, battery pack cooling, motor system cooling, electronic control system cooling, hydraulic system cooling, and engine cooling into a single heat pipe control system through the coordinated operation of the refrigeration circuit, cooling circuit, engine coolant circuit, and blower. Compared with existing technologies, this solution has a high degree of integration, a compact and simple structure, high heat exchange efficiency, high energy efficiency, and strong practicality, making it suitable for widespread promotion and application.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

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

[0022] Figure 1 This is a schematic diagram of the working principle of the thermal management control system for cotton harvesters according to a preferred embodiment of this utility model.

[0023] Legend:

[0024] 11. Cooling water pump; 12. Expansion tank 1; 13. Solenoid valve 1; 14. Heat exchanger 1; 15. Solenoid valve 2; 16. Heat exchanger 2; 17. Solenoid valve 3; 18. Heat exchanger 3; 19. Heat exchanger 4; 21. Compressor; 22. Heat exchanger 5; 23. Solenoid valve 4; 24. Heat exchanger 6; 25. Expansion valve 1; 26. Solenoid valve 5; 27. Heat exchanger 7; 28. Expansion valve 2; 31. Expansion tank 2; 32. Coolant pump; 33. Engine water jacket; 34. Heat exchanger 8; 35. Thermostat; 36. Solenoid valve 6; 37. Heat exchanger 9; 40. Blower. Detailed Implementation

[0025] 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.

[0026] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0027] like Figure 1 As shown, the thermal management control system for the cotton harvester in this embodiment includes a refrigeration circuit, a cooling circuit, an engine coolant circuit, and a blower 40. The refrigeration circuit includes a main refrigeration line for allowing refrigerant to flow, a first heat exchange branch connected to the main refrigeration line for exchanging heat with the refrigerant, and a second heat exchange branch connected to the main refrigeration line for exchanging heat with the refrigerant. The cooling circuit is used to exchange heat with the refrigerant in the first heat exchange branch to cool the hydraulic system, battery pack, electronic control system, and motor system. The engine coolant circuit is used to cool the engine coolant and exchange heat with the engine. The blower 40 is arranged between the second heat exchange branch and the engine coolant circuit to exchange heat with the refrigerant in the second heat exchange branch to deliver cold air to the cab, or to exchange heat with the engine coolant to deliver hot air to the cab.

[0028] like Figure 1As shown, specifically, the thermal management control system for the cotton harvester of this utility model includes a refrigeration circuit where refrigerant flows through the main refrigeration pipe, and then exchanges heat between the refrigerant and the cooling circuit through the first heat exchange branch. This heat exchange coolings the hydraulic system, battery pack, electronic control system, and motor system, achieving heat dissipation for these systems. A second heat exchange branch allows the refrigerant to exchange heat with the air surrounding the blower 40, enabling the blower 40 to deliver cool air to the cab, thus cooling the cab. The engine coolant circuit cools the engine coolant and exchanges heat between the engine coolant and the engine, achieving engine cooling. The engine coolant absorbs heat while cooling the engine, and the heat absorbed by the engine coolant can be exchanged through the blower 40 to deliver hot air to the cab, thus heating the cab and improving energy efficiency. This solution integrates cab cooling, cab heating, battery pack cooling, motor system cooling, electronic control system cooling, hydraulic system cooling, and engine cooling into a single heat pipe control system through the coordinated operation of the refrigeration circuit, cooling circuit, engine coolant circuit, and blower 40. Compared with existing technologies, this solution has a high degree of integration, a compact and simple structure, high heat exchange efficiency, high energy efficiency, and strong practicality, making it suitable for widespread promotion and application.

[0029] It should be understood that heat exchange with blower 40 refers to heat exchange with the air surrounding blower 40.

[0030] like Figure 1 As shown in the figure, in this embodiment, the first heat exchange branch and the second heat exchange branch are arranged side by side for easy control.

[0031] Optionally, the thermal management control system for the cotton harvester also includes a controller, which controls the refrigeration circuit, cooling circuit, engine coolant circuit and blower 40 to work in coordination.

[0032] It should be understood that in the prior art, the heat dissipation of motor systems and electronic control systems generally adopts air cooling. The heat exchange capacity of air cooling is relatively low compared to that of liquid cooling. To achieve the same heat exchange capacity, a larger heat exchange area is required than that of liquid cooling. In hot and harsh weather, the heat exchange efficiency is low, and the heat dissipation effect is difficult to meet the requirements. Moreover, the hydraulic system, battery pack, electronic control system, and motor system are each equipped with separate air-cooled radiators, which is difficult to arrange and results in a large overall size. In this embodiment, the hydraulic system, battery pack, electronic control system, and motor system share a single cooling circuit, which has a simple and compact structure and uses refrigerant heat exchange, resulting in high heat exchange efficiency and guaranteed heat dissipation effect.

[0033] like Figure 1As shown, in this embodiment, the cooling circuit includes a main cooling line connected to the heat exchange end of the first heat exchange branch for exchanging heat with the refrigerant and allowing the coolant to flow, a first cooling branch connected to the main cooling line for cooling the hydraulic system, a second cooling branch connected to the main cooling line for cooling the battery pack, and a third cooling branch connected to the main cooling line for cooling the motor system and the electronic control system. Specifically, the coolant exchanges heat with the refrigerant in the first heat exchange branch through the main cooling pipeline to dissipate heat. The coolant then flows through the first cooling branch to cool the hydraulic system, ensuring effective heat dissipation. In the second cooling branch, the coolant cools the battery pack, ensuring effective heat dissipation. In the third cooling branch, the coolant sequentially cools the motor system and the electronic control system, ensuring effective cooling for both. Finally, the coolant rejoins and flows back into the main cooling pipeline to exchange heat with the refrigerant in the first heat exchange branch, thus re-cooling the hydraulic system, battery pack, motor system, and electronic control system.

[0034] like Figure 1 As shown, in this embodiment, the first cooling branch, the second cooling branch, and the third cooling branch are arranged in parallel to facilitate separate control.

[0035] like Figure 1 As shown, in this embodiment, the main cooling pipeline includes a cooling water pump 11, a delivery pipe connected to the heat exchange end of the first heat exchange branch and the input end of the cooling water pump 11, an expansion tank 12 connected to the delivery pipe, and a return pipe connected to the heat exchange end of the first heat exchange branch, the output end of the first cooling branch, the output end of the second cooling branch, and the output end of the third cooling branch. Specifically, the cooling water pump 11 operates to pump coolant to the first cooling branch, the second cooling branch, and the third cooling branch respectively. After the coolant in the branch is cooled by heat exchange, it flows into the return pipe, then into the heat exchange end of the first heat exchange branch to exchange heat with the refrigerant in the first heat exchange branch, and then flows into the cooling water pump 11 through the delivery pipe. The expansion tank is connected to the delivery pipe to provide pressure regulation, water replenishment, and air venting for the cooling circuit.

[0036] like Figure 1 As shown, in this embodiment, the first cooling branch includes a solenoid valve 13 connected to the output end of the cooling water pump 11, and a heat exchanger 14 connected to the solenoid valve 13 and the return pipe for heat exchange and cooling of the hydraulic system. Specifically, the flow rate of the coolant in the first cooling branch is controlled by the solenoid valve 13 to control the opening and closing of the second cooling branch, and the hydraulic system is cooled by the heat exchanger 14 to achieve heat dissipation of the hydraulic system, and the heat dissipation effect is ensured by liquid cooling.

[0037] like Figure 1 As shown, in this embodiment, the second cooling branch includes a second solenoid valve 15 connected to the output end of the cooling water pump 11, and a second heat exchanger 16 connected to the second solenoid valve 15 and the return pipe for heat exchange and cooling of the battery pack. Specifically, the flow rate of the coolant in the second cooling branch is controlled by the second solenoid valve 15 to control the opening and closing of the second cooling branch, and the battery pack is cooled by the second heat exchanger 16 to achieve heat dissipation of the battery pack, and the heat dissipation effect is ensured by liquid cooling.

[0038] like Figure 1 As shown, in this embodiment, the third cooling branch includes a solenoid valve 17 connected to the output end of the cooling water pump 11, a heat exchanger 18 connected to the solenoid valve 17 for heat exchange and cooling of the electronic control system, and a heat exchanger 19 connected to the solenoid valve 17 and the return pipe for heat exchange and cooling of the motor system. Specifically, the flow rate of the coolant in the third cooling branch is controlled by the solenoid valve 17 to control the opening and closing of the third cooling branch. The heat exchanger 18 then performs heat exchange and cooling of the motor system to achieve heat dissipation of the motor system, and liquid cooling is used to ensure the heat dissipation effect of the motor system. The heat exchanger 19 performs heat exchange and cooling of the electronic control system to achieve heat dissipation of the electronic control system, and liquid cooling is used to ensure the heat dissipation effect of the electronic control system.

[0039] like Figure 1 As shown, in this embodiment, the main refrigeration pipeline includes a compressor 21 and a heat exchanger 22 connected to the compressor 21 for cooling the refrigerant. Specifically, the compressor 21 compresses and pumps the refrigerant to increase its pressure and provide energy for its flow, overcoming pipeline resistance and maintaining system operation. The refrigerant condenses in the heat exchanger 22, releasing heat to the outside, and evaporates in the heat exchanger 27, absorbing heat from the air. Cool air is then delivered to the cab by the blower 40, achieving refrigeration.

[0040] like Figure 1 As shown, in this embodiment, the refrigerant is condensed in heat exchanger 22, releasing heat to the outside, and the heat generated by condensation is discharged into the atmosphere by air cooling.

[0041] like Figure 1As shown, in this embodiment, the first heat exchange main circuit includes an expansion valve 25 connected to heat exchanger 5 22, a heat exchanger 6 24 connected to expansion valve 1 25 for heat exchange with the cooling circuit, and a solenoid valve 4 23 connected to heat exchanger 6 24 and compressor 21 respectively. The heat exchange end of heat exchanger 6 24 is connected to the cooling circuit. Specifically, after the high-pressure liquid refrigerant output from heat exchanger 5 22 flows through expansion valve 1 25, the refrigerant enters heat exchanger 6 24 in a low-temperature and low-pressure state. The refrigerant undergoes evaporation, absorbing heat from the coolant and cooling the coolant. Solenoid valve 4 23 controls the refrigerant flow rate in the first heat exchange branch to control the opening and closing of the first heat exchange branch.

[0042] like Figure 1 As shown, in this embodiment, the second heat exchange branch includes an expansion valve 28 connected to heat exchanger 22, a heat exchanger 27 connected to expansion valve 28 for exchanging heat with the air surrounding blower 40, and a solenoid valve 26 connected to heat exchanger 27 and compressor 21 respectively. Specifically, after the high-pressure liquid refrigerant output from heat exchanger 22 flows through expansion valve 28, the refrigerant enters heat exchanger 27 in a low-temperature and low-pressure state to absorb heat from the air surrounding blower 40, thereby enabling blower 40 to deliver cold air to the cab. Solenoid valve 26 controls the refrigerant flow rate in the second heat exchange branch to control the opening and closing of the second heat exchange branch.

[0043] like Figure 1 As shown, in this embodiment, the engine coolant circuit includes a coolant cooling circuit for circulating and cooling the engine coolant, an expansion tank 31 connected to the coolant cooling circuit, and a coolant heat exchange branch connected to the coolant cooling circuit for exchanging heat with the air around the blower 40. Specifically, in the engine coolant circuit, the engine coolant circulates through the coolant cooling circuit to exchange heat and cool the engine, thereby achieving engine heat dissipation and ensuring the engine's heat dissipation effect. When the cab needs heating, the coolant heat exchange branch is connected to the coolant cooling circuit, and the engine coolant, after absorbing heat, flows into the coolant heat exchange branch to release heat around the blower 40, allowing the blower 40 to deliver hot air into the cab, thus achieving cab heating. The expansion tank 31 maintains the pressure of the coolant cooling circuit, replenishes water, and vents air.

[0044] like Figure 1As shown, in this embodiment, the coolant cooling circuit includes a coolant water pump 32 for pumping engine coolant, an engine water jacket 33 connected to the coolant water pump 32 for exchanging heat between the engine coolant and the engine, a heat exchanger 34 for cooling the coolant, connecting pipes connected to the coolant water pump 32 and the heat exchanger 34 respectively, and a thermostat 35 connected to the connecting pipes, the engine water jacket 33 and the heat exchanger 34 respectively. The thermostat 35 is used to change the flow direction of the engine coolant according to the heat load. Specifically, the engine coolant is pumped by the coolant pump 32 so that it flows to the engine water jacket 33, thereby cooling the engine. After absorbing heat, the engine coolant first flows into the thermostat 35. When the heat load is low, it flows directly through the thermostat 35 to the connecting pipe, and then through the connecting pipe to the coolant pump 32. When the heat load is high, it flows through the thermostat 35 to the heat exchanger 34. After the heat exchanger 34 cools the engine coolant, the engine coolant flows back to the coolant pump 32 through the connecting pipe, thereby realizing the large and small circulation of the engine coolant, improving heat exchange efficiency and ensuring heat dissipation efficiency.

[0045] like Figure 1 As shown, in this embodiment, heat exchanger 834 uses air cooling to exchange heat with the engine coolant.

[0046] like Figure 1 As shown, in this embodiment, the coolant heat exchange branch includes a solenoid valve 36 connected to the coolant cooling circuit and a heat exchanger 37 connected to both the solenoid valve 36 and the coolant cooling circuit for heat exchange with the blower 40. Specifically, the solenoid valve 36 controls the coolant flow rate in the coolant heat exchange branch to control its opening and closing. Heat is then exchanged with the blower 40 via the heat exchanger 37, thereby causing the engine cooler 2 to release heat to the blower 40, allowing the blower 40 to deliver hot air into the passenger compartment.

[0047] like Figure 1 As shown, in this embodiment, the heat dissipation process of the hydraulic system is as follows: the solenoid valve 13 is opened, the cooling water pump 11 is activated, and the coolant is pumped to the heat exchanger 14 to cool the hydraulic system.

[0048] like Figure 1 As shown, in this embodiment, the battery pack heat dissipation process is as follows: Solenoid valve 2 15 is opened, and cooling water pump 11 is activated to pump coolant into heat exchanger 2 16 to cool the battery pack.

[0049] like Figure 1As shown, in this embodiment, the heat dissipation process of the motor system and the electronic control system is as follows: Solenoid valve 3 17 is opened, and cooling water pump 11 is operated to first pump the coolant to heat exchanger 3 18 to cool the motor system, and then the coolant flows into heat exchanger 4 19 to cool the electronic control system.

[0050] like Figure 1 As shown, in this embodiment, the refrigerant heat dissipation process is as follows: the compressor 21 operates to deliver the refrigerant to the heat exchanger 22 for heat exchange and cooling.

[0051] like Figure 1 As shown, in this embodiment, the coolant heat dissipation process is as follows: Solenoid valve 23 is opened, and compressor 21 is working to deliver refrigerant to heat exchanger 24 to cool the coolant.

[0052] like Figure 1 As shown, in this embodiment, the cab cooling process is as follows: Solenoid valve 26 is opened, compressor 21 operates, and refrigerant is delivered to heat exchanger 27 to exchange heat and cool the air around blower 40. Blower 40 delivers cold air to the cab.

[0053] like Figure 1 As shown, in this embodiment, the engine cooling process is as follows: the coolant pump 32 operates to pump the engine coolant into the engine water jacket 33 for heat exchange and cooling of the engine.

[0054] like Figure 1 As shown, in this embodiment, the engine coolant heat dissipation process is as follows: the coolant pump 32 operates so that the engine coolant flows sequentially through the engine water jacket 33 and the thermostat 35 until it flows into the heat exchanger 34 to cool the engine coolant.

[0055] like Figure 1 As shown, in this embodiment, the cab heating process is as follows: Solenoid valve 36 is opened, coolant pump 32 is activated, so that engine coolant flows through engine water jacket 33 and then into heat exchanger 37 to heat the air around blower 40. Blower 40 delivers hot air to the cab.

[0056] The range-extended electric cotton harvester of this embodiment includes the aforementioned thermal management control system for cotton harvesters. Specifically, by employing the aforementioned thermal management control system in the range-extended electric cotton harvester, the system achieves cooling and heating of the cab, heat dissipation of the battery pack, motor system, electronic control system, hydraulic system, and engine, ensuring efficient heat dissipation. Simultaneously, the simple and compact thermal management control system facilitates a reduction in the overall size of the range-extended electric cotton harvester and improves energy utilization.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thermal management control system for a cotton harvester, characterized in that, It includes a refrigeration circuit, a cooling circuit, an engine coolant circuit, and a blower (40). The refrigeration circuit includes a main refrigeration line for the flow of refrigerant, a first heat exchange branch connected to the main refrigeration line for heat exchange of the refrigerant, and a second heat exchange branch connected to the main refrigeration line for heat exchange of the refrigerant. The cooling circuit is used to exchange heat with the refrigerant in the first heat exchange branch to cool the hydraulic system, battery pack, electronic control system, and motor system. The engine coolant circuit is used to cool the engine coolant and exchange heat with the engine. The blower (40) is located between the second heat exchange branch and the engine coolant circuit and is used to exchange heat with the refrigerant in the second heat exchange branch to deliver cold air to the cab, or to exchange heat with the engine coolant to deliver hot air to the cab.

2. The thermal management control system for cotton harvesters according to claim 1, characterized in that, The cooling circuit includes a main cooling line connected to the heat exchange end of the first heat exchange branch for exchanging heat with the refrigerant and allowing the coolant to flow, a first cooling branch connected to the main cooling line for cooling the hydraulic system, a second cooling branch connected to the main cooling line for cooling the battery pack, and a third cooling branch connected to the main cooling line for cooling the motor system and the electronic control system.

3. The thermal management control system for cotton harvesters according to claim 2, characterized in that, The main cooling pipeline includes a cooling water pump (11), a delivery pipe connected to the heat exchange end of the first heat exchange branch and the input end of the cooling water pump (11) respectively, an expansion tank (12) connected to the delivery pipe, and a return pipe connected to the heat exchange end of the first heat exchange branch, the output end of the first cooling branch, the output end of the second cooling branch and the output end of the third cooling branch respectively.

4. The thermal management control system for cotton harvesters according to claim 3, characterized in that, The first cooling branch includes a solenoid valve (13) connected to the output of the cooling water pump (11) and a heat exchanger (14) connected to the solenoid valve (13) and the return pipe for cooling the hydraulic system; and / or The second cooling branch includes a second solenoid valve (15) connected to the output of the cooling water pump (11) and a second heat exchanger (16) connected to the second solenoid valve (15) and the return pipe for cooling the battery pack; and / or The third cooling branch includes a solenoid valve three (17) connected to the output end of the cooling water pump (11), a heat exchanger three (18) connected to the solenoid valve three (17) for heat exchange and cooling of the electronic control system, and a heat exchanger four (19) connected to the solenoid valve three (17) and the return pipe for heat exchange and cooling of the motor system.

5. The thermal management control system for cotton harvesters according to any one of claims 1-4, characterized in that, The main refrigeration pipeline includes a compressor (21) and a heat exchanger (22) connected to the compressor (21) for cooling the refrigerant.

6. The thermal management control system for cotton harvesters according to claim 5, characterized in that, The first heat exchange main circuit includes an expansion valve 1 (25) connected to heat exchanger 5 (22), a heat exchanger 6 (24) connected to expansion valve 1 (25) for heat exchange with the cooling circuit, and a solenoid valve 4 (23) connected to heat exchanger 6 (24) and compressor (21) respectively. The heat exchange end of heat exchanger 6 (24) is connected to the cooling circuit; and / or The second heat exchange branch includes an expansion valve 2 (28) connected to heat exchanger 5 (22), a heat exchanger 7 (27) connected to expansion valve 2 (28) for exchanging heat with the air around the blower (40), and a solenoid valve 5 (26) connected to heat exchanger 7 (27) and compressor (21) respectively.

7. The thermal management control system for cotton harvesters according to any one of claims 1-4, characterized in that, The engine coolant circuit includes a coolant cooling circuit for circulating and cooling the engine coolant, an expansion tank 2 (31) connected to the coolant cooling circuit, and a coolant heat exchange branch connected to the coolant cooling circuit for exchanging heat with the air around the blower (40).

8. The thermal management control system for cotton harvesters according to claim 7, characterized in that, The coolant cooling circuit includes a coolant water pump (32) for pumping engine coolant, an engine water jacket (33) connected to the coolant water pump (32) for exchanging heat between the engine coolant and the engine, a heat exchanger (34) for cooling the coolant, connecting pipes connected to the coolant water pump (32) and the heat exchanger (34) respectively, and a thermostat (35) connected to the connecting pipes, the engine water jacket (33) and the heat exchanger (34) respectively. The thermostat (35) is used to change the flow direction of the engine coolant according to the heat load.

9. The thermal management control system for cotton harvesters according to claim 7, characterized in that, The coolant heat exchange branch includes a solenoid valve six (36) connected to the coolant cooling circuit and a heat exchanger nine (37) connected to the solenoid valve six (36) and the coolant cooling circuit respectively for exchanging heat with the air around the blower (40).

10. A range-extended electric cotton harvester, characterized in that, The thermal management and control system for cotton harvesters as described in any one of claims 1-9.

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