Operation machine cooperative heat dissipation control method and device and operation machine

Abstract

The invention discloses a cooperative heat dissipation control method and device for an operation machine and the operation machine, and belongs to the technical field of thermal management of the operation machine. The method comprises the steps that the cooling liquid temperature and the hydraulic oil temperature are obtained; when the cooling liquid temperature is higher than the first cooling liquid target temperature and the hydraulic oil temperature is higher than the hydraulic oil target temperature, a cooling liquid temperature difference value is calculated according to the cooling liquid temperature and the first cooling liquid temperature; calculating a hydraulic oil temperature difference value according to the hydraulic oil temperature and the hydraulic oil target temperature; whether the current cooling liquid temperature difference value and the current hydraulic oil temperature difference value are stable or not is judged according to the cooling liquid temperature difference value and the hydraulic oil temperature difference value; under the condition that the cooling liquid temperature difference value or the hydraulic oil temperature difference value is unstable, a target heat dissipation control strategy is determined according to the unstable condition of the cooling liquid temperature difference value and the hydraulic oil temperature difference value and the current heat dissipation control strategy; and controlling the heat dissipation system to work according to the target heat dissipation control strategy.

Description

Technical Field

[0001] This application relates to the field of thermal management technology for work machinery, specifically to a collaborative heat dissipation control method for work machinery, a collaborative heat dissipation control device for work machinery, and a work machinery. Background Technology

[0002] Construction machinery is an important component of the equipment manufacturing industry. In general terms, construction machinery refers to the mechanical equipment necessary for comprehensive mechanized construction projects, including earthmoving, road construction and maintenance, mobile lifting and loading operations, and various building projects.

[0003] Construction machinery operates under complex conditions involving variable loads and frequent start-stop cycles, resulting in engines rarely running in their high-efficiency range and low fuel thermal efficiency. To achieve low-carbon and environmentally friendly goals, the electrification of construction machinery has received widespread attention. However, the three core electrical systems (battery, motor, and electronic control system) are highly temperature-sensitive, requiring active cooling to maintain optimal vehicle operating temperatures. Current motor and control systems employ water cooling, adjusting the water pump speed to balance the heat load under varying operating conditions. When the motor operating temperature exceeds the target temperature, the water pump speed is adjusted to improve heat dissipation. However, changing the flow rate by adjusting the water pump speed results in poor system responsiveness. Furthermore, when the water pump operates outside its design conditions, its power consumption increases significantly, leading to a decrease in the cooling system's coefficient of performance (COP), resulting in poor economic efficiency. Prolonged high-speed operation of the water pump also carries the risk of mechanical component damage. Additionally, single-pump control has low efficiency and poor environmental adaptability. Summary of the Invention

[0004] The purpose of this application is to provide a method, device, and machine for coordinated heat dissipation control of operating machinery, in order to solve the technical problem in the prior art that the target temperature is used as the reference for adjusting the heat dissipation components, resulting in poor environmental adaptability.

[0005] To achieve the above objectives, the first aspect of this application provides a method for coordinated heat dissipation control of operating machinery, the method comprising: Obtain the coolant temperature and hydraulic oil temperature; When the coolant temperature is higher than the first coolant target temperature and the hydraulic oil temperature is higher than the hydraulic oil target temperature, the coolant temperature difference is calculated based on the coolant temperature and the first coolant temperature; the hydraulic oil temperature difference is calculated based on the hydraulic oil temperature and the hydraulic oil target temperature. Determine whether the current coolant temperature difference and hydraulic oil temperature difference are stable based on the coolant temperature difference and hydraulic oil temperature difference. When the coolant temperature difference or hydraulic oil temperature difference is unstable, a target heat dissipation control strategy is determined based on the instability of the coolant temperature difference and hydraulic oil temperature difference, as well as the current heat dissipation control strategy. The heat dissipation system is controlled to operate according to the target heat dissipation control strategy.

[0006] Based on the above technical means, it can be determined whether the cooling circuit of the motor and electronic control system is in thermal equilibrium by judging whether the current temperature difference of the coolant and the temperature difference of the hydraulic oil are stable. It can also be determined whether the cooling circuit of the hydraulic system is in thermal equilibrium by judging whether the current temperature difference of the hydraulic oil is stable. If the thermal equilibrium is not reached, the target heat dissipation control strategy can be determined according to the specific situation. This has higher environmental adaptability and reduces the energy consumption of each hardware while ensuring heat dissipation efficiency.

[0007] In some feasible embodiments, determining whether the current coolant temperature difference and hydraulic oil temperature difference are stable based on the coolant temperature difference and hydraulic oil temperature difference includes: The current coolant temperature difference is compared with the coolant temperature difference of the most recent preset number of times. If the current coolant temperature difference is the same as the coolant temperature difference of the most recent preset number of times, the current coolant temperature difference is determined to be stable; otherwise, the current coolant temperature difference is unstable. The current hydraulic oil temperature difference is compared with the hydraulic oil temperature difference of the most recent preset number of times. If the current hydraulic oil temperature difference is the same as the hydraulic oil temperature difference of the most recent preset number of times, the current hydraulic oil temperature difference is determined to be stable; otherwise, the current hydraulic oil temperature difference is unstable.

[0008] Based on the above technical means, the stability of the coolant temperature difference is determined by whether the coolant temperature difference remains constant for a preset number of times, thereby determining whether the cooling circuit of the motor control system has reached thermal equilibrium. Similarly, the stability of the hydraulic oil temperature difference is determined by whether the hydraulic system cooling circuit has reached thermal equilibrium, thus providing a basis for determining the target heat dissipation control strategy.

[0009] In some feasible embodiments, a target heat dissipation control strategy is determined based on the instability of the coolant temperature difference and the hydraulic oil temperature difference, as well as the current heat dissipation control strategy, including: If the hydraulic oil temperature difference is unstable, and if the current fan speed has not reached its maximum, adjust the fan speed to the maximum and send an alarm for excessively high hydraulic oil temperature. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, and if the current fan speed is not at its maximum, adjust the fan speed to its maximum. If the coolant temperature difference is unstable and the fan speed is set to maximum, then a high-flow-rate cooling strategy will be activated. If the coolant temperature difference is unstable, and the fan speed is set to maximum, the flow proportional valve is fully open, and the first and second flow valves are fully open, then the coolant pump speed is increased, and an alarm signal for overheating of the motor control system is sent.

[0010] Based on the above technical means, the cooling fan can simultaneously cool the hydraulic system and the motor and electronic control system. Multiple cooling strategies are set up, such as fan cooling strategy, high flow cooling strategy, and water pump control strategy, which are activated in stages according to the temperature difference of the coolant. The cooling circuit of the motor and electronic control system can be used in a wide range of operating temperatures.

[0011] In some feasible embodiments, a target heat dissipation control strategy is determined based on the instability of the coolant temperature difference and the hydraulic oil temperature difference, as well as the current heat dissipation control strategy, including: If the hydraulic oil temperature difference is unstable, and if the current fan speed has not reached its maximum, adjust the fan speed to the maximum and send an alarm for excessively high hydraulic oil temperature. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, activate the high-flow-rate cooling strategy. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, the flow proportional valve is fully open, and the current fan speed has not reached its maximum, then adjust the fan speed to its maximum. If the coolant temperature difference is unstable, and the fan speed is set to maximum, the flow proportional valve is fully open, and the first and second flow valves are fully open, then the coolant pump speed is increased, and an alarm signal for overheating of the motor control system is sent.

[0012] Based on the above technical means, the cooling fan can simultaneously cool the hydraulic system and the motor and electronic control system. Multiple cooling strategies are set up. When the temperature difference of the hydraulic oil is stable and the temperature difference of the coolant is unstable, the cooling circuit of the hydraulic system reaches thermal equilibrium. The cooling circuit of the motor and electronic control system is prioritized to cool the cooling circuit. The high flow rate cooling strategy is used first. When the temperature difference of the hydraulic oil fluctuates, the fan speed can also be adjusted to cool the hydraulic oil.

[0013] In some feasible embodiments, the high-flow-rate heat dissipation strategy includes: Open the second inlet of the three-way confluence valve on the motor control system cooling circuit and the flow proportional valve on the coolant tank branch to increase the coolant flow in the motor control system cooling circuit. Then, re-determine whether the coolant differential value is stable. If it is unstable, increase the opening of the flow proportional valve until the flow proportional valve is fully open.

[0014] Based on the above technical means, a coolant tank branch is set up. By opening the three-way confluence valve, the coolant in the coolant tank branch is collected and flows into the cooling circuit of the motor control system, which increases the coolant flow in the cooling circuit of the motor control system and reduces the power consumption of the pump. At the same time, by adjusting the opening of the flow proportional valve, the circuit flow can be changed to adapt to different heat dissipation requirements.

[0015] In some feasible embodiments, a target heat dissipation control strategy is determined based on the instability of the coolant temperature difference and the hydraulic oil temperature difference, as well as the current heat dissipation control strategy, including: If the coolant temperature difference is unstable, and the fan speed is set to maximum and the flow proportional valve is fully open, then the coolant cooling strategy will be activated.

[0016] Through the above-mentioned technical means, a coolant cooling strategy is set after the fan cooling strategy and the high-flow-rate cooling strategy. Coolant cooling can reduce the coolant temperature, improve the heat dissipation efficiency of the motor and electronic control system cooling circuit, and broaden the system's heat dissipation threshold.

[0017] In some feasible embodiments, the coolant cooling strategy includes: Open the first flow valve and the second flow valve on the coolant refrigeration circuit, and open the second outlet of the three-way diverter valve on the motor control system cooling circuit. The coolant flowing back into the coolant tank from the second outlet of the three-way diverter valve is cooled by the coolant refrigeration circuit and then flows back into the coolant tank. Check again whether the coolant differential is stable. If it is unstable, increase the opening of the first flow valve and the second flow valve until the first flow valve and the second flow valve are fully open.

[0018] Based on the above technical means, opening the three-way diverter valve allows the cooled liquid to flow back into the coolant tank after being cooled through the coolant refrigeration circuit, thereby reducing the coolant temperature. At the same time, a first flow valve and a second flow valve are set up. By adjusting the opening of the two valves, the degree of cooling of the coolant can be controlled, which can significantly broaden the heat dissipation threshold of the system.

[0019] In some feasible embodiments, the method further includes: If the temperature difference between the coolant and the hydraulic oil remains stable, the current heat dissipation control strategy shall be maintained.

[0020] A second aspect of this application provides a collaborative heat dissipation control device for operating machinery, the device comprising: a cooling circuit for a motor control system, a cooling circuit for a hydraulic system, a signal monitoring system, and a coolant refrigeration system. The cooling circuit of the hydraulic system shares a radiator with the cooling circuit of the motor and electronic control system. The cooling circuit of the motor control system includes a coolant tank, a flow proportional valve, a three-way confluence valve, and a three-way diverter valve. A flow proportional valve is installed between the outlet of the coolant tank and the second inlet of the three-way confluence valve. The first inlet of the three-way confluence valve is connected to the coolant motor outlet side. The outlet of the three-way confluence valve is connected to the radiator coolant inlet. The radiator coolant outlet is connected to the inlet of the three-way diverter valve. The second outlet of the three-way diverter valve is connected to the coolant tank inlet. The first outlet of the three-way diverter valve is connected to the coolant pump inlet. The coolant refrigeration system includes a first flow valve, a heat exchanger, a second flow valve, and a refrigeration module. The first flow valve is located between the second outlet of the three-way diverter valve and the inlet of the coolant tank, and the second flow valve is located between the refrigeration module and the heat exchanger. The signal monitoring system includes a coolant temperature sensor, a hydraulic oil temperature sensor, and a vehicle controller. The coolant temperature sensor is located on the coolant motor outlet side, and the hydraulic oil temperature sensor is located on the radiator inlet side. The coolant temperature sensor and the hydraulic oil temperature sensor are electrically connected to the vehicle controller. The vehicle controller is used to control the collaborative heat dissipation of the working machinery in accordance with the aforementioned collaborative heat dissipation control method for working machinery.

[0021] Based on the aforementioned technical means, in this collaborative heat dissipation control device, a coolant tank branch is set up in the cooling circuit of the motor control system. By opening the three-way confluence valve, the coolant in the coolant tank branch is collected and flows into the cooling circuit of the motor control system, increasing the coolant flow rate in the cooling circuit of the motor control system and reducing pump power consumption. At the same time, by adjusting the opening of the flow proportional valve, the circuit flow rate can be changed to adapt to different heat dissipation requirements. A coolant refrigeration system is set up. By opening the three-way diverter valve, the cooled coolant is cooled through the coolant refrigeration circuit and then flows back into the coolant tank, reducing the coolant temperature. At the same time, a first flow valve and a second flow valve are set up. By adjusting the opening of the two valves, the degree of cooling of the coolant can be controlled, which can significantly broaden the heat dissipation threshold of the system.

[0022] A third aspect of this application provides a work machine that utilizes the aforementioned work machine cooperative heat dissipation control device.

[0023] Through the above technical solution, the collaborative heat dissipation control method for the operating machinery can determine whether the cooling circuit of the motor and electronic control system is in thermal equilibrium based on whether the current coolant temperature difference and hydraulic oil temperature difference are stable, and whether the hydraulic system cooling circuit is in thermal equilibrium based on whether the current hydraulic oil temperature difference is stable. If thermal equilibrium has not been reached, the target heat dissipation control strategy is determined according to the specific situation. It has higher environmental adaptability and reduces the energy consumption of each hardware while ensuring heat dissipation efficiency.

[0024] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings: Figure 1The schematic diagram illustrates the steps of a collaborative heat dissipation control method for operating machinery according to an embodiment of this application; Figure 2 This illustration schematically shows a working machinery cooperative heat dissipation control device according to an embodiment of this application; Figure 3 This illustration schematically shows a mileage diagram of a collaborative heat dissipation control method for operating machinery according to an embodiment of this application; Figure 4 The illustration shows a mileage diagram of a collaborative heat dissipation control method for operating machinery according to another embodiment of this application.

[0026] Explanation of reference numerals in the attached figures 1-Motor controller, 2-Motor, 3-Coolant temperature sensor, 4-Three-way confluence valve, 5-Coolant tank, 6-Three-way diverter valve, 7-Coolant pump, 8-Radiator, 9-Hydraulic oil temperature sensor, 10-Hydraulic system, 11-Flow proportional valve, 12-First flow valve, 13-Heat exchanger, 14-Second flow valve, 15-Refrigeration module. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application all comply with relevant laws and regulations. In the embodiments of this application, certain existing industry solutions such as software, components, and models may be mentioned. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this application, and do not imply that the applicant has already used or necessarily used such solutions.

[0029] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] The collaborative heat dissipation method for operating machinery in this application is arranged in the vehicle controller. Figure 1 The illustration schematically depicts the steps of a collaborative heat dissipation control method for operating machinery according to an embodiment of this application. For example... Figure 1 As shown in the figure, this application provides a method for coordinated heat dissipation control of operating machinery, which may include the following steps.

[0032] S1: Obtain the coolant temperature and hydraulic oil temperature. In this embodiment, the coolant temperature refers to the temperature of the coolant after heat exchange with the motor 2, which is obtained by the coolant temperature sensor 3 installed on the outlet side of the motor 2 and then transmitted to the vehicle controller. The hydraulic oil temperature refers to the temperature of the hydraulic oil returning to the hydraulic system 10, which is obtained by the hydraulic oil temperature sensor 9 installed on the inlet side of the radiator 8 and then transmitted to the vehicle controller.

[0033] S2: When the coolant temperature is higher than the first coolant target temperature and the hydraulic oil temperature is higher than the hydraulic oil target temperature, calculate the coolant temperature difference based on the coolant temperature and the first coolant temperature; calculate the hydraulic oil temperature difference based on the hydraulic oil temperature and the hydraulic oil target temperature. In this embodiment, the first coolant target temperature and the hydraulic oil target temperature are the coolant and hydraulic oil heat loads that the fan speed corresponding to the initial fan gear can satisfy. When the coolant temperature is lower than the first coolant target temperature and the hydraulic oil temperature is lower than the hydraulic oil target temperature, the vehicle operates under ideal heat dissipation conditions.

[0034] S3: Determine whether the current coolant temperature difference and hydraulic oil temperature difference are stable based on the coolant temperature difference and hydraulic oil temperature difference. In this embodiment, specifically, the current coolant temperature difference can be compared with the coolant temperature difference of the most recent preset number of times. If the current coolant temperature difference is the same as the coolant temperature difference of the most recent preset number of times, then the current coolant temperature difference is determined to be stable; otherwise, the current coolant temperature difference is unstable. Similarly, the current hydraulic oil temperature difference can be compared with the hydraulic oil temperature difference of the most recent preset number of times. If the current hydraulic oil temperature difference is the same as the hydraulic oil temperature difference of the most recent preset number of times, then the current hydraulic oil temperature difference is determined to be stable; otherwise, the current hydraulic oil temperature difference is unstable. By using whether the coolant temperature difference remains stable for a preset number of times to determine whether the coolant temperature difference is stable, it is determined whether the cooling circuit of the motor control system has reached thermal equilibrium. Similarly, by using whether the hydraulic oil temperature difference remains stable for a preset number of times to determine whether the hydraulic oil temperature difference is stable, it is determined whether the cooling circuit of the hydraulic system 10 has reached thermal equilibrium, providing a basis for determining the target heat dissipation control strategy.

[0035] S4: If the coolant temperature difference or hydraulic oil temperature difference is unstable, determine the target heat dissipation control strategy based on the instability of the coolant temperature difference and hydraulic oil temperature difference, and the current heat dissipation control strategy; if the coolant temperature difference and hydraulic oil temperature difference are stable, maintain the current heat dissipation control strategy.

[0036] S5: Control the operation of the heat dissipation system according to the target heat dissipation control strategy.

[0037] Based on the above technical means, it can be determined whether the cooling circuit of the current motor and electronic control system is in thermal equilibrium state based on whether the current coolant temperature difference and hydraulic oil temperature difference are stable. It can also be determined whether the cooling circuit of the hydraulic system 10 is in thermal equilibrium state based on whether the current hydraulic oil temperature difference is stable. If thermal equilibrium state is not reached, the target heat dissipation control strategy is determined according to the current specific situation, which has higher environmental adaptability and reduces the energy consumption of each hardware while ensuring heat dissipation efficiency.

[0038] In some feasible embodiments, a target heat dissipation control strategy is determined based on the instability of the coolant temperature difference and the hydraulic oil temperature difference, as well as the current heat dissipation control strategy, including: If the hydraulic oil temperature difference is unstable, and if the current fan speed has not reached its maximum, adjust the fan speed to the maximum and send an alarm for excessively high hydraulic oil temperature. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, and if the current fan speed is not at its maximum, adjust the fan speed to its maximum. If the coolant temperature difference is unstable and the fan speed is set to maximum, then a high-flow-rate cooling strategy will be activated. If the coolant temperature difference is unstable and the fan speed is set to maximum, the flow proportional valve 11 is fully open, and the first flow valve 12 and the second flow valve 14 are fully open, then the coolant pump speed is increased, and an alarm signal for overheating of the motor control system is sent.

[0039] Based on the above technical means, the hydraulic system 10 and the motor and electronic control system are cooled simultaneously by a cooling fan. Multiple cooling strategies are set up, such as fan cooling strategy, high flow cooling strategy, and water pump control strategy, which are activated in stages according to the temperature difference of the coolant. The cooling circuit of the motor and electronic control system can be used in a wide range of operating temperatures.

[0040] In some feasible embodiments, a target heat dissipation control strategy is determined based on the instability of the coolant temperature difference and the hydraulic oil temperature difference, as well as the current heat dissipation control strategy, including: If the hydraulic oil temperature difference is unstable, and if the current fan speed has not reached its maximum, adjust the fan speed to the maximum and send an alarm for excessively high hydraulic oil temperature. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, activate the high-flow-rate cooling strategy. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, the flow proportional valve 11 is fully open, and the current fan speed has not reached the maximum, then the fan speed is adjusted to the maximum. If the coolant temperature difference is unstable and the fan speed is set to maximum, the flow proportional valve 11 is fully open, and the first flow valve 12 and the second flow valve 14 are fully open, then the coolant pump speed is increased, and an alarm signal for overheating of the motor control system is sent.

[0041] Based on the above technical means, the cooling fan simultaneously cools the hydraulic system 10 and the motor and electronic control system. Multiple cooling strategies are set up. When the temperature difference of the hydraulic oil is stable and the temperature difference of the coolant is unstable, the cooling circuit of the hydraulic system 10 reaches thermal balance. The priority is to cool the cooling circuit of the motor and electronic control system. The high flow rate cooling strategy is used first. When the temperature difference of the hydraulic oil fluctuates, the fan speed can also be adjusted to cool the hydraulic oil.

[0042] In some feasible embodiments, the high-flow-rate heat dissipation strategy includes: Open the second inlet of the three-way confluence valve 4 on the motor control system cooling circuit and the flow proportional valve 11 on the coolant tank branch to increase the coolant flow in the motor control system cooling circuit. Then, re-determine whether the coolant differential value is stable. If it is unstable, increase the opening of the flow proportional valve 11 until the flow proportional valve 11 is fully open.

[0043] Based on the above technical means, a coolant tank branch is set up. The three-way confluence valve 4 is opened to allow the coolant in the coolant tank branch to be collected and flow into the cooling circuit of the motor control system, thereby increasing the coolant flow in the cooling circuit of the motor control system and reducing the power consumption of the pump. At the same time, the flow rate of the circuit can be changed by adjusting the opening of the flow proportional valve 11 to adapt to different heat dissipation requirements.

[0044] In some feasible embodiments, a target heat dissipation control strategy is determined based on the instability of the coolant temperature difference and the hydraulic oil temperature difference, as well as the current heat dissipation control strategy, including: If the coolant temperature difference is unstable and the fan speed is set to maximum, and the flow proportional valve 11 is fully open, then the coolant cooling strategy will be activated.

[0045] Through the above-mentioned technical means, a coolant cooling strategy is set after the fan cooling strategy and the high-flow-rate cooling strategy. Coolant cooling can reduce the coolant temperature, improve the heat dissipation efficiency of the motor and electronic control system cooling circuit, and broaden the system's heat dissipation threshold.

[0046] In some feasible embodiments, the coolant cooling strategy includes: Open the first flow valve 12 and the second flow valve 14 on the coolant refrigeration circuit and open the second outlet of the three-way diverter valve 6 on the motor control system cooling circuit. The coolant flowing back into the coolant tank 5 from the second outlet of the three-way diverter valve 6 is cooled by the coolant refrigeration circuit and then flows back into the coolant tank 5. Check again whether the coolant difference is stable. If it is not stable, increase the opening of the first flow valve 12 and the second flow valve 14 until the first flow valve 12 and the second flow valve 14 are fully open.

[0047] According to the above technical means, opening the three-way diverter valve 6 allows the cooled liquid to flow back into the coolant tank 5 after being cooled through the coolant refrigeration circuit, thereby reducing the coolant temperature. At the same time, the first flow valve 12 and the second flow valve 14 are set. By adjusting the opening of the two valves, the cooling degree of the coolant can be controlled, which can significantly broaden the heat dissipation threshold of the system.

[0048] like Figure 2 As shown, a second aspect of this application provides a collaborative heat dissipation control device for operating machinery. The device includes: a cooling circuit for a motor control system, a cooling circuit for a hydraulic system, a signal monitoring system, and a coolant refrigeration system. The cooling circuit of the hydraulic system 10 and the cooling circuit of the motor and electronic control system share the radiator 8; The cooling circuit of the motor control system includes a coolant tank 5, a flow proportional valve 11, a three-way confluence valve 4, and a three-way diverter valve 6. A flow proportional valve 11 is installed between the outlet of the coolant tank 5 and the second inlet of the three-way confluence valve 4. The first inlet of the three-way confluence valve 4 is connected to the coolant motor outlet side. The outlet of the three-way confluence valve 4 is connected to the coolant inlet of the radiator 8. The coolant outlet of the radiator 8 is connected to the inlet of the three-way diverter valve 6. The second outlet of the three-way diverter valve 6 is connected to the inlet of the coolant tank 5. The first outlet of the three-way diverter valve 6 is connected to the inlet of the coolant pump 7. The coolant refrigeration system includes a first flow valve 12, a heat exchanger 13, a second flow valve 14, and a refrigeration module 15. The first flow valve 12 is located between the second outlet of the three-way diverter valve 6 and the inlet of the coolant tank 5, and the second flow valve 14 is located between the refrigeration module 15 and the heat exchanger 13. The signal monitoring system includes a coolant temperature sensor 3, a hydraulic oil temperature sensor 9, and a vehicle controller. The coolant temperature sensor 3 is located on the coolant motor outlet side, and the hydraulic oil temperature sensor 9 is located on the radiator 8 oil inlet side. The coolant temperature sensor 3 and the hydraulic oil temperature sensor 9 are electrically connected to the vehicle controller. The vehicle controller is used to control the collaborative heat dissipation of the working machinery in accordance with the aforementioned collaborative heat dissipation control method for working machinery.

[0049] The cooling circuit of the motor control system also includes motor controller 1, motor 2, radiator 8, and water pump, forming the main circuit. The water pump drives the coolant to absorb heat through motor controller 1 and motor 2 in sequence. The heated coolant enters radiator 8, and part of the heat of the coolant is forcibly dissipated by the fan. The low-temperature coolant flowing out of radiator 8 flows back to the water pump.

[0050] In this embodiment, the radiator 8 is a composite radiator that integrates water and oil, meaning that both high-temperature coolant and high-temperature hydraulic oil enter the radiator. After absorbing heat, the radiator exchanges heat with the outside air through a fan, while simultaneously cooling the coolant and hydraulic oil, thus achieving the purpose of cooling the motor control system and the hydraulic system 10.

[0051] The coolant tank 5, along with the flow proportional valve 11, the three-way confluence valve 4, and the three-way diverter valve 6 in the motor control system's cooling circuit, form a flow regulation system. The coolant tank 5 and the flow proportional valve 11 constitute the coolant tank branch. The three-way confluence valve 4 and the three-way diverter valve 6 connect the coolant tank branch to the main circuit. Specifically: the second outlet 6b of the three-way diverter valve 6 is connected to the inlet of the coolant tank 5; the outlet of the coolant tank 5 is connected to the flow proportional valve 11; the flow proportional valve 11 is connected to the second inlet 4b of the three-way confluence valve 4; the first inlet 4a of the three-way confluence valve 4 is connected to the coolant outlet of the motor 2; the outlet 4c of the three-way confluence valve 4 is connected to the coolant inlet of the radiator 8; the coolant outlet of the radiator 8 is connected to the inlet 6c of the three-way diverter valve 6; and the first outlet 6a of the three-way diverter valve 6 is connected to the water pump inlet. The coolant tank branch, after merging with the main circuit, functions to regulate flow.

[0052] The coolant tank branch is connected to the hot side of heat exchanger 13, and the cold side of heat exchanger 13 is connected to refrigeration module 15. High-temperature fluid in coolant tank 5 enters the hot side of heat exchanger 13 and undergoes convective heat exchange with the low-temperature liquid at the outlet of refrigeration module 15. The cooled fluid returns to coolant tank 5. A first flow valve 12 is located between coolant tank 5 and heat exchanger 13, and a second flow valve 14 is located between refrigeration module 15 and heat exchanger 13. The operating temperature of the coolant is adjusted by changing the opening degree of the flow valves.

[0053] In some feasible embodiments, the signal monitoring system further includes a fan speed sensor, a water pump speed sensor, and a valve opening sensor. The fan speed sensor is installed on the fan side of the radiator 8, the water pump speed sensor is installed at the water pump, and the valve opening sensor is installed at the flow proportional valve 11. The fan speed is controlled by the coolant temperature signal and the hydraulic oil temperature signal. The coolant temperature signal is also used to determine the opening and closing of the three-way diverter valve 6 and the three-way merge valve, the opening degree of the flow proportional valve 11, and the water pump speed.

[0054] In some other embodiments, the flow proportional valve can be replaced with a variable diameter port, and flow control can be achieved by changing the diameter of the variable diameter port.

[0055] According to the above-mentioned technical means, in this collaborative heat dissipation control device, a coolant tank branch is set in the cooling circuit of the motor control system. The three-way confluence valve is opened to allow the coolant in the coolant tank branch to converge and flow into the cooling circuit of the motor control system, thereby increasing the coolant flow rate in the cooling circuit of the motor control system and reducing pump power consumption. At the same time, the flow rate of the circuit can be changed by adjusting the opening degree of the flow proportional valve to adapt to different heat dissipation requirements. A coolant refrigeration system is set up. The three-way diverter valve 6 is opened to allow the cooled coolant to flow back into the coolant tank 5 after being cooled by the coolant refrigeration circuit, thereby reducing the coolant temperature. At the same time, a first flow valve 12 and a second flow valve 14 are set up. By adjusting the opening degree of the two valves, the cooling degree of the coolant can be controlled, which can significantly broaden the heat dissipation threshold of the system.

[0056] A third aspect of this application provides a work machine that utilizes the aforementioned work machine cooperative heat dissipation control device.

[0057] Through the above technical solution, the collaborative heat dissipation control method for the operating machinery can determine whether the cooling circuit of the motor and electronic control system is in thermal equilibrium based on whether the current coolant temperature difference and hydraulic oil temperature difference are stable, and whether the cooling circuit of the hydraulic system 10 is in thermal equilibrium based on whether the current hydraulic oil temperature difference is stable. If the thermal equilibrium state is not reached, the target heat dissipation control strategy is determined according to the current specific situation. It has higher environmental adaptability and reduces the energy consumption of each hardware while ensuring heat dissipation efficiency.

[0058] Example 1 like Figure 3 The diagram shown is a schematic flowchart of a collaborative heat dissipation control method for operating machinery according to an embodiment of this application. This method can regulate the heat dissipation of the hydraulic system and the motor control system, and can execute corresponding heat dissipation control strategies based on different motor outlet coolant temperatures. Figure 3 As shown, when using the collaborative heat dissipation control method for operating machinery according to this application to control heat dissipation, the coolant temperature is first obtained. T water_out and hydraulic oil temperature T oil_out Then determine the coolant temperature. T water_out Is it higher than the first target temperature of the coolant? T water_max,1 Or hydraulic oil temperature T oil_out Is it higher than the target temperature of the hydraulic oil? T oil_max If the coolant temperature T water_out Less than or equal to the first target temperature of the coolant T water_max,1 And hydraulic oil temperature Toil_out Less than or equal to the target temperature of the hydraulic oil T oil_max The vehicle operates under ideal cooling conditions and requires no further cooling. If the coolant temperature... T water_out Higher than the first target temperature of the coolant T water_max,1 Or hydraulic oil temperature T oil_out Higher than the target temperature of hydraulic oil T oil_max Increase fan speed. N fan Switch to the medium setting to accelerate air convection and heat transfer, thereby increasing heat dissipation.

[0059] Then, calculate the coolant temperature difference Δ based on the coolant temperature and the first coolant temperature. T water The hydraulic oil temperature difference Δ is calculated based on the hydraulic oil temperature and the target hydraulic oil temperature. T oil Determine the coolant temperature difference Δ T water The temperature difference Δ between the hydraulic oil and the hydraulic oil T oil Is it stable? If Δ T water and Δ T oil Both are stable, and the vehicle is in thermal equilibrium at this point, with the fan maintaining its current speed. If Δ T oil If the hydraulic oil temperature is unstable and continues to rise, increase the fan speed to maximum and send an alarm for excessively high hydraulic oil temperature. If Δ T oil If stable, then further determine the coolant temperature difference Δ T water Is it stable? If Δ T water If the temperature is stable, the motor and electronic control system will reach thermal equilibrium, and the fan will maintain its current speed; if Δ T water The system is unstable, and the temperature of the motor control system is still rising. Further assessment is needed to determine if the current fan speed has reached its maximum. If the current fan speed has not reached its maximum, adjust it to the maximum. If the current fan speed has reached its maximum, open the second inlet of the three-way confluence valve 4 on the motor control system's cooling circuit and the flow proportional valve on the coolant tank branch. Coolant from the coolant tank branch flows into the cooling circuit, increasing the coolant flow rate in the motor control system's cooling circuit. At this time, the initial opening of the flow proportional valve on the coolant tank branch is 10%, increasing the coolant flow rate in the main circuit and increasing the heat exchange through the radiator 8. The coolant difference Δ is then re-determined. Twater If the flow rate is unstable, increase the opening of the proportional flow valve to adjust the coolant circuit flow rate and enhance heat exchange until the proportional flow valve is fully open. If increasing the coolant flow rate in the motor control system's cooling circuit results in Δ... T water Once it stabilizes, maintain the current fan speed and the current flow rate proportional valve opening.

[0060] If the fan speed is set to maximum and the flow proportional valve is fully open, but the coolant differential value Δ T water If the situation remains unstable, the coolant cooling strategy is activated. The first flow valve 12 and the second flow valve 14 on the coolant cooling circuit are opened, as is the second outlet of the three-way diverter valve 6 on the motor control system cooling circuit. Coolant flowing back into the coolant tank from the second outlet of the three-way diverter valve 6 is cooled by the coolant cooling circuit and then flows back into the coolant tank 5. It then merges into the main circuit via a branch line in the coolant tank. At this point, the coolant temperature in the circuit decreases, and the heat dissipation capacity of the motor drive cooling system is enhanced. The coolant difference Δ is then re-determined. T water If the flow is unstable, increase the opening of the first flow valve 12 and the second flow valve 14 to adjust the flow rate of the coolant entering the refrigeration circuit and enhance the temperature drop of the coolant until the first flow valve 12 and the second flow valve 14 are fully open. If Δ T water If it remains unstable, increase the speed of coolant pump 7. N pump To prevent damage from thermal overload of the motor drive system, an alarm signal for excessively high temperature of the motor control system is sent.

[0061] The aforementioned collaborative heat dissipation control method for operating machinery integrates fan speed control, flow control, cooling control, and water pump speed control strategies. It sets multiple mixed heat dissipation modes according to different coolant temperatures and can adaptively dissipate heat based on the corresponding coolant temperature gradient. It can perform real-time thermal monitoring of the machine and send an alarm signal when the operating temperature exceeds the heat dissipation system's control capacity, ensuring that the machine operates in a safe thermal environment.

[0062] Example 2 like Figure 4 The diagram shown is a schematic flowchart of a collaborative heat dissipation control method for operating machinery according to another embodiment of this application. This method can regulate the heat dissipation of the hydraulic system and the motor control system, and can execute corresponding heat dissipation control strategies based on different motor outlet coolant temperatures. Figure 4 As shown, when using the collaborative heat dissipation control method for operating machinery according to this application to control heat dissipation, the coolant temperature is first obtained. T water_out and hydraulic oil temperature T oil_outThen determine the coolant temperature. T water_out Is it higher than the first target temperature of the coolant? T water_max,1 Or hydraulic oil temperature T oil_out Is it higher than the target temperature of the hydraulic oil? T oil_max If the coolant temperature T water_out Less than or equal to the first target temperature of the coolant T water_max,1 And hydraulic oil temperature T oil_out Less than or equal to the target temperature of the hydraulic oil T oil_max The vehicle operates under ideal cooling conditions and requires no further cooling. If the coolant temperature... T water_out Higher than the first target temperature of the coolant T water_max,1 Or hydraulic oil temperature T oil_out Higher than the target temperature of hydraulic oil T oil_max Increase fan speed. N fan Switch to the medium setting to accelerate air convection and heat transfer, thereby increasing heat dissipation.

[0063] Then, calculate the coolant temperature difference Δ based on the coolant temperature and the first coolant temperature. T water The hydraulic oil temperature difference Δ is calculated based on the hydraulic oil temperature and the target hydraulic oil temperature. T oil Determine the coolant temperature difference Δ T water The temperature difference Δ between the hydraulic oil and the hydraulic oil T oil Is it stable? If Δ T water and Δ T oil Both are stable, and the vehicle is in thermal equilibrium at this point, with the fan maintaining its current speed. If Δ T oil If unstable, adjust the fan speed to maximum and send an alarm for excessively high hydraulic oil temperature. If Δ T oil If stable, then further determine the coolant temperature difference Δ T water Is it stable? If Δ T water If the temperature is stable, the motor and electronic control system will reach thermal equilibrium, and the fan will maintain its current speed. If Δ Twater If the temperature of the motor and electronic control system remains unstable and continues to rise, a high-flow-rate cooling strategy is activated. This involves opening the second inlet of the three-way confluence valve 4 on the motor and electronic control system's cooling circuit and the flow proportional valve on the coolant tank branch. Coolant from the coolant tank branch flows into the cooling circuit, increasing the coolant flow rate in the motor and electronic control system's cooling circuit. At this point, the initial opening of the flow proportional valve on the coolant tank branch is 10%, increasing the coolant flow rate in the main circuit and thus increasing the heat exchange through the radiator 8. The coolant difference Δ is then re-determined. T water If the flow rate is unstable, increase the opening of the proportional flow valve until it is fully open. If the coolant flow rate in the motor control system's cooling circuit is increased, Δ... T water Once it stabilizes, maintain the current fan speed and the current flow rate proportional valve opening.

[0064] If the flow proportional valve is fully open, but the coolant differential value Δ T water If the problem persists, further determine if the current fan speed has reached its maximum. If it hasn't, adjust the fan speed to maximum. If the fan speed is at maximum, the proportional flow valve will be fully open, but the coolant differential value Δ... T water If the situation remains unstable, the coolant cooling strategy is activated. The first flow valve 12 and the second flow valve 14 on the coolant cooling circuit are opened, as is the second outlet of the three-way diverter valve 6 on the motor control system cooling circuit. Coolant flowing back into the coolant tank from the second outlet of the three-way diverter valve 6 is cooled by the coolant cooling circuit and then flows back into the coolant tank 5. It then merges into the main circuit via a branch line in the coolant tank. At this point, the coolant temperature in the circuit decreases, and the heat dissipation capacity of the motor drive cooling system is enhanced. The coolant difference Δ is then re-determined. T water If the flow is unstable, increase the opening of the first flow valve 12 and the second flow valve 14 to adjust the flow rate of the coolant entering the refrigeration circuit and enhance the temperature drop of the coolant until the first flow valve 12 and the second flow valve 14 are fully open. If Δ T water If it remains unstable, increase the speed of coolant pump 7. N pump To prevent damage from thermal overload of the motor drive system, an alarm signal for excessively high temperature of the motor control system is sent.

[0065] The aforementioned collaborative heat dissipation control method for operating machinery integrates fan speed control, flow control, cooling control, and water pump speed control strategies. It sets multiple mixed heat dissipation modes according to different coolant temperatures and can adaptively dissipate heat based on the corresponding coolant temperature gradient. It can perform real-time thermal monitoring of the machine and send an alarm signal when the operating temperature exceeds the heat dissipation system's control capacity, ensuring that the machine operates in a safe thermal environment.

[0066] This application also provides a machine-readable storage medium storing instructions that cause a machine to execute the above-described collaborative heat dissipation control method for operating machinery.

[0067] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0068] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0069] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0070] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0071] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0072] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0073] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0074] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0075] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for coordinated heat dissipation control of operating machinery, characterized in that, The method includes: Obtain the coolant temperature and hydraulic oil temperature; When the coolant temperature is higher than the first coolant target temperature and the hydraulic oil temperature is higher than the hydraulic oil target temperature, the coolant temperature difference is calculated based on the coolant temperature and the first coolant temperature; the hydraulic oil temperature difference is calculated based on the hydraulic oil temperature and the hydraulic oil target temperature. Determine whether the current coolant temperature difference and hydraulic oil temperature difference are stable based on the coolant temperature difference and hydraulic oil temperature difference. When the coolant temperature difference or hydraulic oil temperature difference is unstable, a target heat dissipation control strategy is determined based on the instability of the coolant temperature difference and hydraulic oil temperature difference, as well as the current heat dissipation control strategy. The heat dissipation system is controlled to operate according to the target heat dissipation control strategy.

2. The collaborative heat dissipation control method for operating machinery according to claim 1, characterized in that, Determining whether the current coolant temperature difference and hydraulic oil temperature difference are stable based on the coolant temperature difference and hydraulic oil temperature difference includes: The current coolant temperature difference is compared with the coolant temperature difference of the most recent preset number of times. If the current coolant temperature difference is the same as the coolant temperature difference of the most recent preset number of times, the current coolant temperature difference is determined to be stable; otherwise, the current coolant temperature difference is unstable. The current hydraulic oil temperature difference is compared with the hydraulic oil temperature difference of the most recent preset number of times. If the current hydraulic oil temperature difference is the same as the hydraulic oil temperature difference of the most recent preset number of times, the current hydraulic oil temperature difference is determined to be stable; otherwise, the current hydraulic oil temperature difference is unstable.

3. The collaborative heat dissipation control method for operating machinery according to claim 1, characterized in that, Based on the instability of the coolant temperature difference and hydraulic oil temperature difference, and the current heat dissipation control strategy, a target heat dissipation control strategy is determined, including: If the hydraulic oil temperature difference is unstable, and if the current fan speed has not reached its maximum, adjust the fan speed to the maximum and send an alarm for excessively high hydraulic oil temperature. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, and if the current fan speed is not at its maximum, adjust the fan speed to its maximum. If the coolant temperature difference is unstable and the fan speed is set to maximum, then a high-flow-rate cooling strategy will be activated. If the coolant temperature difference is unstable, and the fan speed is set to maximum, the flow proportional valve is fully open, and the first and second flow valves are fully open, then the coolant pump speed is increased, and an alarm signal for overheating of the motor control system is sent.

4. The collaborative heat dissipation control method for operating machinery according to claim 1, characterized in that, Based on the instability of the coolant temperature difference and hydraulic oil temperature difference, and the current heat dissipation control strategy, a target heat dissipation control strategy is determined, including: If the hydraulic oil temperature difference is unstable, and if the current fan speed has not reached its maximum, adjust the fan speed to the maximum and send an alarm for excessively high hydraulic oil temperature. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, activate the high-flow-rate cooling strategy. If the hydraulic oil temperature difference is stable, but the coolant temperature difference is unstable, the flow proportional valve is fully open, and the current fan speed has not reached its maximum, then adjust the fan speed to its maximum. If the coolant temperature difference is unstable, and the fan speed is set to maximum, the flow proportional valve is fully open, and the first and second flow valves are fully open, then the coolant pump speed is increased, and an alarm signal for overheating of the motor control system is sent.

5. The collaborative heat dissipation control method for operating machinery according to claim 3 or 4, characterized in that, The high-flow-rate heat dissipation strategy includes: Open the second inlet of the three-way confluence valve on the motor control system cooling circuit and the flow proportional valve on the coolant tank branch to increase the coolant flow in the motor control system cooling circuit. Then, re-determine whether the coolant differential value is stable. If it is unstable, increase the opening of the flow proportional valve until the flow proportional valve is fully open.

6. The collaborative heat dissipation control method for operating machinery according to claim 3 or 4, characterized in that, Based on the instability of the coolant temperature difference and hydraulic oil temperature difference, and the current heat dissipation control strategy, a target heat dissipation control strategy is determined, including: If the coolant temperature difference is unstable, and the fan speed is set to maximum and the flow proportional valve is fully open, then the coolant cooling strategy will be activated.

7. The collaborative heat dissipation control method for operating machinery according to claim 6, characterized in that, The coolant cooling strategy includes: Open the first flow valve and the second flow valve on the coolant refrigeration circuit, and open the second outlet of the three-way diverter valve on the motor control system cooling circuit. The coolant flowing back into the coolant tank from the second outlet of the three-way diverter valve is cooled by the coolant refrigeration circuit and then flows back into the coolant tank. Check again whether the coolant differential is stable. If it is unstable, increase the opening of the first flow valve and the second flow valve until the first flow valve and the second flow valve are fully open.

8. The collaborative heat dissipation control method for operating machinery according to claim 1, characterized in that, The method further includes: If the temperature difference between the coolant and the hydraulic oil remains stable, the current heat dissipation control strategy shall be maintained.

9. A collaborative heat dissipation control device for operating machinery, characterized in that, The device includes: a cooling circuit for the motor control system, a cooling circuit for the hydraulic system, a signal monitoring system, and a coolant refrigeration system. The cooling circuit of the hydraulic system shares a radiator with the cooling circuit of the motor and electronic control system. The cooling circuit of the motor control system includes a coolant tank, a flow proportional valve, a three-way confluence valve, and a three-way diverter valve. A flow proportional valve is installed between the outlet of the coolant tank and the second inlet of the three-way confluence valve. The first inlet of the three-way confluence valve is connected to the coolant motor outlet side. The outlet of the three-way confluence valve is connected to the radiator coolant inlet. The radiator coolant outlet is connected to the inlet of the three-way diverter valve. The second outlet of the three-way diverter valve is connected to the coolant tank inlet. The first outlet of the three-way diverter valve is connected to the coolant pump inlet. The coolant refrigeration system includes a first flow valve, a heat exchanger, a second flow valve, and a refrigeration module. The first flow valve is located between the second outlet of the three-way diverter valve and the inlet of the coolant tank, and the second flow valve is located between the refrigeration module and the heat exchanger. The signal monitoring system includes a coolant temperature sensor, a hydraulic oil temperature sensor, and a vehicle controller. The coolant temperature sensor is located on the coolant motor outlet side, and the hydraulic oil temperature sensor is located on the radiator inlet side. The coolant temperature sensor and the hydraulic oil temperature sensor are electrically connected to the vehicle controller. The vehicle controller is used to control the collaborative heat dissipation of the working machinery in accordance with the collaborative heat dissipation control method for working machinery as described in any one of claims 1-8.

10. A type of operating machinery, characterized in that, The operating machinery uses the operating machinery collaborative heat dissipation control device as described in claim 9.

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