Heat management system, control device therefor, heat management control method, and working machine

Abstract

The application belongs to the technical field of working machines, and particularly relates to a thermal management system, a control device thereof, a thermal management control method and a working machine. The thermal management system comprises: a first cooling assembly arranged on an engine and used for cooling the engine; a second cooling assembly arranged on a hydraulic oil tank and used for cooling hydraulic oil in the hydraulic oil tank; a heat dissipation assembly, the first cooling assembly, the second cooling assembly and the heat dissipation assembly all have cooling liquid flowing therethrough, and the heat dissipation assembly is used for dissipating heat of the cooling liquid; a circulating pump used for driving the cooling liquid to circulate; a plurality of reversing valves, each working oil port of the reversing valves is respectively communicated with the first cooling assembly, the second cooling assembly and the heat dissipation assembly; and a controller electrically connected with the plurality of reversing valves, and used for controlling the plurality of reversing valves to reverse, so that the first cooling assembly, the second cooling assembly and / or the heat dissipation assembly form a circulating loop. The thermal management system can perform thermal management on the engine and the hydraulic oil tank according to working conditions.

Description

Technical Field

[0001] This invention belongs to the field of work machinery technology, specifically relating to a thermal management system and its control device, thermal management control method, and work machinery. Background Technology

[0002] In the field of excavating machinery, especially excavators, the engine, as the core power source, continuously generates a large amount of heat during operation. If this heat cannot be dissipated in time, it will lead to overheating of the engine, damaging internal components and affecting the normal operation and service life of the excavator. Therefore, excavators are generally equipped with radiators to cool the engine and ensure stable operation within a reasonable temperature range. In existing excavators, the connection structure between the radiator and the engine, as well as the coolant circulation method, are fixed. The coolant only forms an independent circulation between the engine and the radiator to remove the heat generated by the engine. This thermal management system only controls the engine temperature and does not involve the temperature regulation of the hydraulic oil in the excavator's hydraulic system, thus failing to meet the operational needs of the hydraulic system.

[0003] The aforementioned heat dissipation structure can only dissipate heat from the engine. In low-temperature environments, after the machinery is started from cold, the hydraulic oil temperature rises slowly, and the heat generated by the engine cannot be provided to the hydraulic oil tank for heating. The hydraulic oil in the tank needs a long time to reach the optimal operating temperature. In hot weather or during continuous high-load operation, the hydraulic oil heats up rapidly, and the cooling load is too large and the cooling effect is poor as it relies solely on the cooling components of the hydraulic system itself for heat dissipation. Summary of the Invention

[0004] The purpose of this invention is to provide a thermal management system and its control device, thermal management control method and operating machinery, so as to solve the technical problem that the heat dissipation system in the prior art has a single function and can only dissipate heat for the engine.

[0005] To achieve the above objectives, the present invention provides a thermal management system, comprising: The first cooling assembly is mounted on the engine and is used to cool the engine; The second cooling component is installed on the hydraulic oil tank and is used to cool the hydraulic oil in the hydraulic oil tank; The heat dissipation assembly contains coolant flowing through the first cooling assembly, the second cooling assembly, and the heat dissipation assembly, which is used to dissipate heat from the coolant. A circulation pump is used to drive the circulation of coolant. Multiple directional valves, each of which has its working oil port connected to the first cooling component, the second cooling component, and the heat dissipation component, respectively; The controller is electrically connected to multiple directional valves and is used to control the directional valves to switch so that the first cooling component and the second cooling component and / or heat dissipation component form a circulation loop.

[0006] In some embodiments, the first cooling assembly includes a first cooling pipe section, the second cooling assembly includes a second cooling pipe section, and the plurality of reversing valves are: a first reversing valve, with three working oil ports respectively connected to the first end of the first cooling pipe section, the first end of the second cooling pipe section, and the first working oil port of the heat dissipation assembly; a second reversing valve, with three working oil ports respectively connected to the second end of the first cooling pipe section, the first end of the second cooling pipe section, and the second working oil port of the heat dissipation assembly; and a third reversing valve, with three working oil ports respectively connected to the second end of the first cooling pipe section, the second end of the second cooling pipe section, and the first working oil port of the heat dissipation assembly.

[0007] In some embodiments, the thermal management system further includes a temperature sensing element electrically connected to the controller, the temperature sensing element being used to detect the temperature of the hydraulic oil in the hydraulic tank and transmit it to the controller.

[0008] A second aspect of the present invention provides a thermal management control method for use in the aforementioned thermal management system. The thermal management control method includes: acquiring the temperature of hydraulic oil in a hydraulic oil tank; determining the temperature range of the hydraulic oil based on the hydraulic oil temperature; determining a control strategy corresponding to the temperature range based on the temperature range; and controlling the switching of multiple directional valves according to the control strategy.

[0009] In some implementations, determining the control strategy corresponding to a temperature range based on the temperature range includes: when the hydraulic oil temperature is in a first temperature range, determining the control strategy as a low-temperature control strategy; when the hydraulic oil temperature is in a second temperature range, determining the control strategy as a normal-temperature control strategy; and when the hydraulic oil temperature is in a third temperature range, determining the control strategy as a high-temperature control strategy; wherein the temperature values ​​contained in the first temperature range, the second temperature range, and the third temperature range increase sequentially and do not overlap.

[0010] In some embodiments, the multiple reversing valves are designated as a first reversing valve, a second reversing valve, and a third reversing valve. The first cooling assembly includes a first cooling pipe section, and the second cooling assembly includes a second cooling pipe section. When the control strategy is a low-temperature control strategy, controlling the reversing of the multiple reversing valves according to the control strategy includes: controlling the first reversing valve to open the first end of the first cooling pipe section and the first end of the second cooling pipe section; controlling both second reversing valves to close; and controlling the third reversing valve to open the second end of the first cooling pipe section and the second end of the second cooling pipe section, so that the first cooling assembly and the second cooling assembly form a circulation loop.

[0011] In some embodiments, the multiple reversing valves are designated as a first reversing valve, a second reversing valve, and a third reversing valve. The first cooling assembly includes a first cooling pipe section, and the second cooling assembly includes a second cooling pipe section. When the control strategy is a normal temperature control strategy, controlling the reversing of the multiple reversing valves according to the control strategy includes: controlling the first reversing valve to open the first end of the first cooling pipe section and the first working oil port of the heat dissipation assembly; controlling the second reversing valve to open the second end of the first cooling pipe section and the second working oil port of the heat dissipation assembly; and controlling all third reversing valves to close, so that the first cooling assembly and the heat dissipation assembly form a circulation loop.

[0012] In some embodiments, the multiple reversing valves are designated as a first reversing valve, a second reversing valve, and a third reversing valve. The first cooling assembly includes a first cooling pipe section, and the second cooling assembly includes a second cooling pipe section. When the control strategy is a high-temperature control strategy, controlling the reversing of the multiple reversing valves according to the control strategy includes: controlling the first reversing valve to connect the first end of the first cooling pipe section and the first working oil port of the heat dissipation assembly; controlling the second reversing valve to connect the second working oil port of the heat dissipation assembly and the first end of the second cooling pipe section; and controlling the third reversing valve to connect the second end of the second cooling pipe section and the second end of the first cooling pipe section, so that the first cooling assembly, the second cooling assembly, and the heat dissipation assembly form a circulation loop.

[0013] A third aspect of the present invention provides a control device for a thermal management system, the control device comprising: a memory configured to store instructions; and a processor configured to retrieve instructions from the memory and to implement the above-described thermal management control method when executing the instructions.

[0014] A fourth aspect of the present invention provides a working machine, comprising: the above-described thermal management system.

[0015] In the above technical solution, the thermal management system includes a first cooling component, a second cooling component, a heat dissipation component, a circulation pump, multiple reversing valves, and a controller. Coolant flows through the first, second, and heat dissipation components. The first cooling component cools the engine, the second cooling component cools the hydraulic oil in the hydraulic tank, and the heat dissipation component dissipates heat from the coolant. The circulation pump drives the coolant to circulate within the first, second, and heat dissipation components. Each reversing valve is connected to the first, second, and heat dissipation components. The controller controls multiple reversing valves to form a circulation loop between the first, second, and / or heat dissipation components. The coolant flows within this loop, allowing for heat conduction and enabling control of the coolant flow according to actual needs. When the engine and / or hydraulic tank require heat dissipation, the coolant can be connected to the heat dissipation component to dissipate heat and suppress the temperature rise of the hydraulic oil in the engine and / or hydraulic tank. During cold starts in low-temperature environments, the first and second cooling components can form a circulation loop to transfer heat from the engine to the hydraulic tank, allowing the hydraulic oil to quickly reach a suitable operating temperature. The aforementioned thermal management system can not only cool the engine but also adjust the temperature of the hydraulic oil in the hydraulic tank, thus expanding the functional scope of the thermal management system.

[0016] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the structure of a thermal management system provided according to an embodiment of the present invention; Figure 2 A flowchart of a thermal management control method provided according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures 10 Engines 20 Hydraulic oil tank 30 Heat dissipation components 41 First reversing valve 42 Second directional valve 43 Third directional valve 50 controllers 60 Temperature sensing element 70 Three-way 80 heat dissipation piping Detailed Implementation The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] The following description, with reference to the accompanying drawings, describes a thermal management system, a thermal management control method, a control device for the thermal management system, and operating machinery according to the present invention. Figure 1 The diagram shown is a structural schematic of a thermal management system provided according to an embodiment of the present invention. The thermal management system includes: A first cooling assembly is disposed on the engine 10 and is used to cool the engine 10; The second cooling component is installed on the hydraulic oil tank 20 and is used to cool the hydraulic oil in the hydraulic oil tank 20; Coolant flows through the heat dissipation component 30, the first cooling component, the second cooling component, and the heat dissipation component 30. The heat dissipation component 30 is used to dissipate heat from the coolant. A circulation pump is used to drive the circulation of coolant. Multiple directional valves, each of which has its working oil port connected to the first cooling component, the second cooling component, and the heat dissipation component 30, respectively; The controller 50 is electrically connected to multiple directional valves. The controller 50 is used to control the directional valves to switch so that the first cooling component and the second cooling component and / or the heat dissipation component 30 form a circulation loop.

[0020] In the prior art, the cooling system for engine 10 can only dissipate heat from engine 10, which is a single function and the waste heat of engine 10 is directly dissipated without being effectively utilized, resulting in low efficiency of engine 10.

[0021] This invention provides a thermal management system, which includes a first cooling component, a second cooling component, a heat dissipation component 30, a circulating pump, multiple directional valves, and a controller 50. Through precise control of the multiple directional valves by the controller 50, the flow path of the coolant can be flexibly adjusted, thereby achieving temperature management of the engine 10 and the hydraulic oil tank 20. In low-temperature environments, the controller 50 can control the directional valves to switch directions, connecting the first and second cooling components. This allows the heat generated by the engine 10 to be transferred to the hydraulic oil tank 20 via the coolant, helping the hydraulic oil to quickly warm up to a suitable operating temperature, reducing cold start time, and improving the operating efficiency of the machinery. Under high-temperature conditions or high-load conditions, the controller 50 can switch the directional valve states, allowing the coolant to flow through the heat dissipation component 30, dissipating excess heat to the external environment and preventing the engine 10 and hydraulic oil tank 20 from overheating and affecting their performance or causing damage.

[0022] In one embodiment, the first cooling component includes a first cooling pipe section, the second cooling component includes a second cooling pipe section, and a plurality of reversing valves include a first reversing valve 41, a second reversing valve 42, and a third reversing valve 43. The three working ports of the first reversing valve 41 are respectively connected to the first end of the first cooling pipe section, the first end of the second cooling pipe section, and the first working port of the heat dissipation component 30. The three working ports of the second reversing valve 42 are respectively connected to the second end of the first cooling pipe section, the first end of the second cooling pipe section, and the second working port of the heat dissipation component 30. The three working ports of the third reversing valve 43 are respectively connected to the second end of the first cooling pipe section, the second end of the second cooling pipe section, and the first working port of the heat dissipation component 30. Using the above connection structure, the controller 50 can precisely control the first reversing valve 41, the second reversing valve 42, and the third reversing valve 43, enabling flexible flow of coolant between different components. For example, during the low-temperature start-up phase, the controller 50 can adjust the operating states of the first reversing valve 41 and the third reversing valve 43, ensuring that the coolant circulates only between the first and second cooling pipe sections. This efficiently transfers the heat from the engine 10 to the hydraulic oil tank 20, helping the hydraulic oil quickly reach the ideal operating temperature. Under high-temperature or high-load conditions, the controller 50 can again switch the states of the three reversing valves, guiding the coolant through the heat dissipation assembly 30 to ensure that excess heat is dissipated to the external environment in a timely manner, preventing the system from overheating.

[0023] Specifically, such as Figure 1 As shown, the working oil ports of the three reversing valves connected to the first cooling assembly are all port B, those connected to the heat dissipation assembly 30 are all port A, and those connected to the second cooling assembly are all port C. During the low-temperature start-up phase, ports B and C of the first reversing valve 41 are open, the second reversing valve 42 is closed, and ports B and C of the third reversing valve 43 are open, so that the coolant circulates between the first and second cooling assemblies, allowing the residual heat of the engine 10 to be transferred to the hydraulic oil tank 20. Under normal temperature conditions, the controller 50 controls the first reversing valve 41 to open ports A and B, the second reversing valve 42 to open ports A and B, and the third reversing valve 43 to close, so that the first cooling assembly is connected to the radiator. The radiator can dissipate heat from the coolant, which then enters the first cooling assembly to dissipate heat from the engine 10. Under high-temperature conditions, ports A and B of the first reversing valve 41 are open, ports A and C of the second reversing valve 42 are open, and ports B and C of the third reversing valve 43 are open. The coolant circulates in the first cooling assembly, the second cooling assembly, and the heat dissipation assembly 30, enabling the heat dissipation assembly 30 to dissipate heat from the hydraulic oil in the engine 10 and the hydraulic oil tank 20.

[0024] In a specific embodiment, such as Figure 1As shown, the thermal management system also includes a heat dissipation pipe 80 and multiple tees 70. The first reversing valve 41, the second reversing valve 42, the third reversing valve 43, and the multiple tees 70 are all connected to the heat dissipation pipe 80. The heat dissipation pipe 80 connects the first cooling component, the second cooling component, and the heat dissipation component 30. The heat dissipation pipe 80 is divided into multiple heat dissipation pipe sections. The multiple tees 70 and the multiple reversing valves divide or merge the multiple heat dissipation pipe sections.

[0025] In one embodiment, the thermal management system further includes a temperature detection element 60, which is electrically connected to the controller 50. The temperature detection element 60 is used to detect the oil temperature of the hydraulic oil in the hydraulic oil tank 20 and transmit it to the controller 50. Based on the oil temperature data transmitted by the temperature detection element 60, the controller 50 determines the real-time temperature status of the hydraulic oil in the hydraulic oil tank 20 and, in conjunction with the hydraulic oil temperature, controls the operating position of each directional valve. This enables the thermal management system to perform adaptive control based on the hydraulic oil temperature, preventing the ineffective utilization of the engine's waste heat under low-temperature conditions and the inadequate cooling of the hydraulic oil under high-temperature conditions, which could lead to poor operation of the machinery.

[0026] In one embodiment, the circulation pump is mounted on the first cooling assembly. If the circulation pump were mounted on the hydraulic oil tank 20 or the heat dissipation assembly 30, it would be unable to drive coolant circulation under low-temperature or normal-temperature conditions; therefore, at least two circulation pumps are required. Regardless of whether the operating conditions are low-temperature, normal-temperature, or high-temperature, the coolant in the first cooling assembly will participate in circulation. By mounting the circulation pump on the first cooling assembly, the circulation pump can drive coolant circulation under all operating conditions.

[0027] In one embodiment, such as Figure 2 The diagram shown is a flowchart of a thermal management control method provided according to an embodiment of the present invention. The thermal management control method is used in the aforementioned thermal management system and includes: S101, Obtain the temperature of the hydraulic oil in the hydraulic oil tank 20; S102, determine the temperature range of the hydraulic oil based on the hydraulic oil temperature; S103, determine the control strategy corresponding to the temperature range based on the temperature range; S104 controls the switching of multiple directional valves according to the control strategy.

[0028] The hydraulic oil temperature in the hydraulic oil tank 20 is monitored in real time by the temperature detection device 60, and the data is transmitted to the controller 50. This process ensures that the system can dynamically respond to actual temperature changes in the hydraulic oil, thus providing an accurate basis for subsequent control strategies. Subsequently, the controller 50 compares the acquired hydraulic oil temperature with a preset temperature range to determine the specific range of the current oil temperature. This zoned management approach allows the thermal management system to take differentiated control measures for different temperature conditions, improving the system's flexibility and adaptability. Each temperature range corresponds to a specific control strategy. These strategies are designed based on actual operating conditions; for example, during low-temperature starts, the residual heat of the engine 10 is prioritized; under normal temperature conditions, only the engine 10 is cooled; and under high-temperature conditions, both the engine 10 and the hydraulic oil tank 20 are cooled. In this way, the system can achieve optimal thermal management results in different scenarios. Finally, the controller 50 sends commands to multiple directional valves according to the selected control strategy, adjusting their operating states to change the flow path of the coolant.

[0029] For example, under low-temperature conditions, the controller 50 guides the coolant to circulate between the first and second cooling components, while under high-temperature conditions, it controls the coolant to circulate within the first, second, and heat dissipation components 30 to cool the engine 10 and hydraulic oil tank 20. This control method effectively avoids the limitations of single-function systems in traditional thermal management systems, achieving precise temperature control of the engine 10 and hydraulic oil tank 20.

[0030] In one embodiment, determining the control strategy corresponding to a temperature range based on the temperature range includes: when the hydraulic oil temperature is in a first temperature range, determining the control strategy as a low-temperature control strategy; when the hydraulic oil temperature is in a second temperature range, determining the control strategy as a normal-temperature control strategy; and when the hydraulic oil temperature is in a third temperature range, determining the control strategy as a high-temperature control strategy. The temperature values ​​in the first, second, and third temperature ranges increase sequentially and do not overlap. In the above thermal management control method, by dividing the hydraulic oil temperature into three different ranges, the system can adopt corresponding control strategies for low-temperature, normal-temperature, and high-temperature operating conditions, thereby achieving more refined thermal management. Under low-temperature conditions, the low-temperature control strategy focuses on utilizing the waste heat of the engine 10 to increase the hydraulic oil temperature, shorten the cold start time, and improve the working efficiency of the machinery. Under normal-temperature conditions, the normal-temperature control strategy mainly focuses on the heat dissipation requirements of the engine 10, ensuring its stable operation within a suitable temperature range. When the hydraulic oil temperature enters the high-temperature range, the high-temperature control strategy guides the coolant to flow through the heat dissipation component 30 to efficiently dissipate heat from the engine 10 and the hydraulic oil tank 20, preventing performance degradation or equipment damage due to overheating.

[0031] In one embodiment, the multiple directional valves are a first directional valve 41, a second directional valve 42, and a third directional valve 43. The first cooling assembly includes a first cooling pipe section, and the second cooling assembly includes a second cooling pipe section. When the control strategy is a low-temperature control strategy, controlling the switching of the multiple directional valves according to the control strategy includes: controlling the first directional valve 41 to open the first end of the first cooling pipe section and the first end of the second cooling pipe section; controlling the second directional valve 42 to close; and controlling the third directional valve 43 to open the second end of the first cooling pipe section and the second end of the second cooling pipe section, so that the first cooling assembly and the second cooling assembly form a circulation loop. When the control strategy is a low-temperature control strategy, the hydraulic oil temperature is low, and the waste heat of the engine 10 can be used to heat the hydraulic oil in the hydraulic oil tank 20, achieving efficient energy utilization. Specifically, the controller 50 controls the B and C ports of the first reversing valve 41 to be open, the B and C ports of the third reversing valve 43 to be open, and the second reversing valve 42 to be closed, so that the first cooling component and the second cooling component form a circulation loop. The waste heat of the engine 10 can be transferred to the hydraulic oil tank 20 through the coolant, and the hydraulic oil tank 20 can also cool the coolant, thereby suppressing the engine 10 from overheating.

[0032] In one embodiment, when the control strategy is a normal temperature control strategy, controlling the switching of multiple directional valves according to the control strategy includes: controlling the first directional valve 41 to open the first end of the first cooling pipe section and the first working oil port of the heat dissipation assembly 30; controlling the second directional valve 42 to open the second end of the first cooling pipe section and the second working oil port of the heat dissipation assembly 30; and controlling the third directional valve 43 to close, so that the first cooling assembly and the heat dissipation assembly 30 form a circulation loop. Under normal temperature conditions, the temperature inside the hydraulic oil tank 20 is usually relatively stable, and there is no need to use the heat dissipation assembly 30 to cool the hydraulic oil tank 20. The heat dissipation assembly 30 only needs to control the temperature of the engine 10. In this embodiment of the invention, the controller 50 adjusts the state of the first directional valve 41 and the second directional valve 42 so that the coolant can form a circulation loop between the first cooling assembly and the heat dissipation assembly 30. Specifically, the A port of the first directional valve 41 is open to the B port, the A port of the second directional valve 42 is open to the B port, and the third directional valve 43 is in the closed state. This flow path ensures that the heat generated by the engine 10 can be effectively transferred to the cooling assembly 30, and that excess heat is dissipated to the external environment through the cooling assembly 30, thereby maintaining the engine 10 within a suitable operating temperature range. Simultaneously, since the hydraulic oil tank 20 does not require additional cooling under this condition, the coolant will not flow through the second cooling assembly, avoiding unnecessary energy loss.

[0033] In one embodiment, when the control strategy is a high-temperature control strategy, controlling the switching of multiple directional valves according to the control strategy includes: controlling the first directional valve 41 to open the first end of the first cooling pipe section and the first working oil port of the heat dissipation assembly 30; controlling the second directional valve 42 to open the second working oil port of the heat dissipation assembly 30 and the first end of the second cooling pipe section; and controlling the third directional valve 43 to open the second end of the second cooling pipe section and the second end of the first cooling pipe section, so that the first cooling assembly, the second cooling assembly, and the heat dissipation assembly 30 form a circulation loop. Under high-temperature conditions, the temperatures of the hydraulic oil tank 20 and the engine 10 may rise rapidly. If heat dissipation is not timely, it may lead to a decrease in system performance or even damage. Therefore, the core of the high-temperature control strategy is to ensure that the coolant can flow through the first cooling assembly, the second cooling assembly, and the heat dissipation assembly 30 simultaneously to form a complete circulation loop, so as to achieve efficient heat dissipation for both. Specifically, the controller 50 adjusts the working states of the first directional valve 41, the second directional valve 42, and the third directional valve 43 to make the coolant flow along a predetermined path. For example, the A port of the first reversing valve 41 is connected to the B port, the A port of the second reversing valve 42 is connected to the C port, and the B port of the third reversing valve 43 is connected to the C port. This configuration allows the coolant to flow out of the first cooling assembly, pass sequentially through the heat dissipation assembly 30 and the second cooling assembly, and finally return to the first cooling assembly, completing a full cycle. During this process, the heat dissipation assembly 30 dissipates excess heat from the engine 10 and the hydraulic oil tank 20 to the external environment, thereby effectively reducing the overall temperature of the thermal management system.

[0034] In one embodiment, a control device for a thermal management system is provided, the control device comprising: a memory configured to store instructions; and a processor configured to retrieve instructions from the memory and, when executing the instructions, to implement the aforementioned thermal management control method.

[0035] In one embodiment, a working machine is provided, including the aforementioned thermal management system.

[0036] In one embodiment, a machine-readable storage medium is provided, on which instructions are stored, for causing a machine to perform any of the above thermal management control methods.

[0037] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A thermal management system, characterized in that, include: First cooling assembly for cooling engine (10); The second cooling component is used to cool the hydraulic oil in the hydraulic oil tank (20); The heat dissipation component (30) contains coolant flowing through the first cooling component, the second cooling component, and the heat dissipation component (30), and the heat dissipation component (30) is used to dissipate heat from the coolant. A circulation pump is used to drive the coolant to circulate. Multiple directional valves, each of which has its working port connected to the first cooling assembly, the second cooling assembly, and the heat dissipation assembly (30), respectively; The controller (50) is electrically connected to the plurality of the reversing valves and is used to control the reversing of the plurality of the reversing valves so that the first cooling assembly forms a circulation loop with the second cooling assembly and / or the heat dissipation assembly (30).

2. The thermal management system according to claim 1, characterized in that, The first cooling assembly includes a first cooling pipe section, the second cooling assembly includes a second cooling pipe section, and the plurality of reversing valves are: The first reversing valve (41) has three working oil ports that are respectively connected to the first end of the first cooling pipe section, the first end of the second cooling pipe section, and the first working oil port of the heat dissipation assembly (30); The second reversing valve (42) has three working oil ports that are respectively connected to the second end of the first cooling pipe section, the first end of the second cooling pipe section, and the second working oil port of the heat dissipation assembly (30); The third reversing valve (43) has three working oil ports that are respectively connected to the second end of the first cooling pipe section, the second end of the second cooling pipe section, and the first working oil port of the heat dissipation assembly (30).

3. The thermal management system according to claim 1, characterized in that, The thermal management system also includes: Temperature detection element (60) is electrically connected to the controller (50). The temperature detection element (60) is used to detect the oil temperature of the hydraulic oil in the hydraulic oil tank (20) and transmit it to the controller (50).

4. A thermal management control method, characterized in that, The thermal management control method is used in the thermal management system according to any one of claims 1 to 3, and the thermal management control method includes: Obtain the temperature of the hydraulic oil in the hydraulic oil tank (20); The temperature range of the hydraulic oil is determined based on the hydraulic oil temperature; Determine the control strategy corresponding to the temperature range based on the temperature range; The switching of multiple directional valves is controlled according to the control strategy described above.

5. The thermal management control method according to claim 4, characterized in that, The control strategy for determining the temperature range based on the temperature range includes: When the hydraulic oil temperature is within the first temperature range, the control strategy is determined to be a low-temperature control strategy. When the hydraulic oil temperature is in the second temperature range, the control strategy is determined to be a normal temperature control strategy. When the hydraulic oil temperature is in the third temperature range, the control strategy is determined to be a high-temperature control strategy. The temperature values ​​contained in the first temperature range, the second temperature range, and the third temperature range increase sequentially and do not overlap.

6. The thermal management control method according to claim 5, characterized in that, The plurality of reversing valves are a first reversing valve (41), a second reversing valve (42), and a third reversing valve (43). The first cooling assembly includes a first cooling pipe section, and the second cooling assembly includes a second cooling pipe section. When the control strategy is a low-temperature control strategy, controlling the reversing of the plurality of reversing valves according to the control strategy includes: Control the first reversing valve (41) to open the first end of the first cooling pipe section and the first end of the second cooling pipe section; The second directional valve (42) is shut off; The third reversing valve (43) is controlled to open the second end of the first cooling pipe section and the second end of the second cooling pipe section so that the first cooling component and the second cooling component form a circulation loop.

7. The thermal management control method according to claim 5, characterized in that, The plurality of reversing valves are respectively a first reversing valve (41), a second reversing valve (42), and a third reversing valve (43). The first cooling assembly includes a first cooling pipe section, and the second cooling assembly includes a second cooling pipe section. When the control strategy is a normal temperature control strategy, controlling the reversing of the plurality of reversing valves according to the control strategy includes: Control the first reversing valve (41) to open the first end of the first cooling pipe section and the first working oil port of the heat dissipation assembly (30); Control the second reversing valve (42) to open the second end of the first cooling pipe section and the second working oil port of the heat dissipation assembly (30); The third reversing valve (43) is controlled to be shut off so that the first cooling component and the heat dissipation component (30) form a circulation loop.

8. The thermal management control method according to claim 5, characterized in that, The plurality of reversing valves are a first reversing valve (41), a second reversing valve (42), and a third reversing valve (43). The first cooling assembly includes a first cooling pipe section, and the second cooling assembly includes a second cooling pipe section. When the control strategy is a high-temperature control strategy, controlling the reversing of the plurality of reversing valves according to the control strategy includes: Control the first reversing valve (41) to open the first end of the first cooling pipe section and the first working oil port of the heat dissipation assembly (30); Control the second reversing valve (42) to open the second working oil port of the heat dissipation assembly (30) and the first end of the second cooling pipe section; The third reversing valve (43) is controlled to open the second end of the second cooling pipe section and the second end of the first cooling pipe section, so that the first cooling component, the second cooling component and the heat dissipation component (30) form a circulation loop.

9. A control device for a thermal management system, characterized in that, include: The memory is configured to store instructions; The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the thermal management control method according to any one of claims 4 to 8.

10. A type of operating machinery, characterized in that, include: The thermal management system according to any one of claims 1 to 3.

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