Control methods for vehicle cooling systems, vehicle cooling systems and vehicles

Abstract

This invention provides a control method for a vehicle's cooling system, the vehicle's cooling system, and a vehicle. The cooling system includes: a radiator for circulating coolant to cool a target component; a plurality of cooling fans for cooling the radiator; the radiator is equipped with a first temperature sensor, a second temperature sensor, and a third temperature sensor, wherein the first temperature sensor detects the ambient temperature around the radiator; the second temperature sensor detects the coolant temperature inside the radiator during the circulating cooling process; the third temperature sensor detects the target temperature of the coolant inside the radiator after the circulating cooling process; and a controller for controlling the plurality of cooling fans to start operating in a preset sequence based on the ambient temperature, coolant temperature, and target temperature.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and more particularly to a control method for a vehicle's cooling system, a vehicle's cooling system, and a vehicle. Background Technology

[0002] As the power output of fuel cell stacks continues to increase, the cooling demands on vehicles are also growing. Since the maximum operating temperature of fuel cell stacks needs to be much lower than that of traditional engines, a more independent and sophisticated cooling system is required to meet these cooling needs. However, current cooling systems and control strategies cannot accurately match these cooling requirements, further exacerbating the energy consumption problem of the cooling system. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, the first objective of this invention is to propose a control method for a vehicle's cooling system, which maximizes the performance of the vehicle's cooling system through a refined control strategy, effectively reduces the energy consumption of the cooling system, and improves the stability and range of vehicle operation.

[0005] A control method for a vehicle's cooling system, the vehicle's cooling system including a radiator, cooling fans, a first temperature sensor, and a second temperature sensor, the radiator being used to circulate cooling for target components, the cooling fans being multiple and used to cool the radiator, the first temperature sensor being used to detect the ambient temperature around the radiator, and the second temperature sensor being used to detect the temperature of the coolant inside the radiator during the circulating cooling process, the method comprising:

[0006] Obtain the operating temperature of the target component, confirm whether the operating temperature exceeds the preset operating temperature threshold, and activate the radiator water pump in response to the operating temperature exceeding the preset operating temperature threshold.

[0007] Obtain ambient temperature and coolant temperature;

[0008] For several cooling fans, calculate the difference between the coolant temperature and the ambient temperature to obtain several coolant-fan temperature difference values;

[0009] The liquid-air temperature difference values ​​are sorted in descending order to obtain a preset order for several cooling fans.

[0010] Control several cooling fans to start working in a preset sequence.

[0011] According to an embodiment of the present invention, a control method for a vehicle cooling system first acquires the operating temperature of a target component, confirms whether the operating temperature exceeds a preset operating temperature threshold, and activates the radiator water pump in response to the operating temperature exceeding the preset operating temperature threshold. Further, the ambient temperature and coolant temperature are acquired. For a plurality of cooling fans, the difference between the coolant temperature and the ambient temperature is calculated to obtain a plurality of coolant-fan temperature difference values. The plurality of coolant-fan temperature difference values ​​are sorted in descending order to obtain a preset order for the plurality of cooling fans. The plurality of cooling fans are controlled to start operating in the preset order. This invention can improve the overall performance of the cooling system by analyzing, optimizing, and improving the inherent characteristics of the cooling system, and by utilizing the close cooperation and efficient collaboration between the radiator, cooling fans, temperature sensors, and controller. Simultaneously, to address the potential temperature unevenness on the radiator surface, precise control of the cooling fans in the cooling system is implemented. This refined control not only helps reduce the energy consumed by the cooling system but also significantly improves the vehicle's range, providing drivers with a more economical and environmentally friendly driving experience.

[0012] In addition, the control method for the vehicle cooling system according to the above embodiments of the present invention may also have the following additional technical features:

[0013] According to some embodiments of the present invention, the vehicle's cooling system further includes a third temperature sensor for detecting a target temperature of the coolant inside the radiator after circulation and cooling. Before acquiring the ambient temperature and the coolant temperature, the method further includes:

[0014] Obtain the target temperature;

[0015] Confirm whether the target temperature is greater than the preset target temperature threshold;

[0016] In response to the target temperature exceeding the preset target temperature threshold, the ambient temperature and coolant temperature are confirmed and acquired.

[0017] According to some embodiments of the present invention, controlling a plurality of cooling fans to start working in a preset sequence includes:

[0018] In response to turning on any cooling fan, confirm whether the target temperature does not exceed the preset target temperature threshold;

[0019] In response to a target temperature exceeding a preset target temperature threshold, the next cooling fan adjacent to the current cooling fan in the preset sequence is activated.

[0020] According to some embodiments of the present invention, the method further includes:

[0021] In response to the activation of any cooling fan, a preset temperature difference range corresponding to the liquid-air temperature difference value of that cooling fan is determined, and the fan duty cycle of that cooling fan is controlled according to the preset temperature difference range.

[0022] The second objective of this invention is to provide a vehicle cooling system that optimizes the performance of the cooling system, effectively reduces the energy consumption of the cooling system, and improves the stability and range of vehicle operation.

[0023] A vehicle cooling system, comprising:

[0024] A radiator is used to circulate and dissipate heat from a target component using coolant.

[0025] Several cooling fans are used to dissipate heat from the radiator;

[0026] The radiator is equipped with a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor is used to detect the ambient temperature around the radiator; the second temperature sensor is used to detect the temperature of the coolant inside the radiator during the circulation process; and the third temperature sensor is used to detect the target temperature of the coolant inside the radiator after the circulation process.

[0027] The controller is used to control several cooling fans to start working in a preset sequence based on ambient temperature, coolant temperature and target temperature.

[0028] In addition, the vehicle cooling system according to the above embodiments of the present invention may also have the following additional technical features:

[0029] According to some embodiments of the present invention, the radiator is provided with a coolant inlet and a coolant outlet. The coolant inlet is used to input coolant into the radiator, and the coolant outlet is used to discharge the coolant after it has been circulated and cooled. A third temperature sensor is provided at the coolant outlet.

[0030] According to some embodiments of the present invention, the vehicle's cooling system further includes a mounting bracket;

[0031] When the cooling fan is an intake-type cooling fan, the mounting bracket is set on the side of the heat sink away from the cooling fan;

[0032] When the cooling fan is a blower-type cooling fan, the mounting bracket is set between the heat sink and the cooling fan.

[0033] According to some embodiments of the present invention, at least one first temperature sensor is disposed on a fixed bracket and at a position corresponding to the cooling fan; at least one second temperature sensor is disposed on the heat sink; the second temperature sensor corresponds to the first temperature sensor.

[0034] According to some embodiments of the present invention, a second temperature sensor is disposed between adjacent heat dissipation fins of the heat sink.

[0035] According to some embodiments of the present invention, the fixing bracket includes a first fixing rod and a second fixing rod. The two ends of the first fixing rod are disposed on the frame of the heat sink. The second fixing rod has a first end and a second end. The first end is movably disposed on the first fixing rod, and the second end is inserted between adjacent heat dissipation fins of the heat sink. A second temperature sensor is disposed at the second end of the second fixing rod.

[0036] According to some embodiments of the present invention, a first temperature sensor is disposed on a first fixed rod, the first fixed rod is provided with a slide rail, and the first temperature sensor is provided with a pulley, so that the position of the first temperature sensor on the first fixed rod is adjustable.

[0037] According to some embodiments of the present invention, there are multiple fixed brackets, and at least two support rods for supporting the adjacent fixed brackets are arranged crosswise between two adjacent fixed brackets. The at least two support rods can rotate around the intersection point to adjust the included angle between the at least two support rods.

[0038] A vehicle cooling system according to an embodiment of the present invention mainly includes a radiator for circulating coolant to cool target components; several cooling fans for cooling the radiator; the radiator is equipped with a first temperature sensor, a second temperature sensor, and a third temperature sensor, wherein the first temperature sensor detects the ambient temperature around the radiator; the second temperature sensor detects the coolant temperature inside the radiator during circulation; the third temperature sensor detects the target temperature of the coolant inside the radiator after circulation; and a controller controls the cooling fans to operate in a preset sequence based on the ambient temperature, coolant temperature, and target temperature. This invention improves the overall performance of the cooling system by analyzing, optimizing, and improving its inherent characteristics, and by utilizing the close cooperation and efficient coordination between the radiator, cooling fans, temperature sensors, and controller. Furthermore, it precisely controls the cooling fans in the cooling system to address potential temperature unevenness on the radiator surface. This refined control not only helps reduce the energy consumed by the cooling system but also significantly improves the vehicle's range, providing drivers with a more economical and environmentally friendly driving experience.

[0039] A third objective of the present invention is to provide a vehicle including the aforementioned vehicle cooling system, wherein the vehicle cooling system is used to execute the aforementioned vehicle cooling system control method.

[0040] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a front view of the heat dissipation system structure provided in an embodiment of the present invention.

[0043] Figure 2 A side view of the heat dissipation system structure provided in an embodiment of the present invention.

[0044] Figure 3 This is a rear view of the heat dissipation system structure provided in an embodiment of the present invention.

[0045] Figure 4 This is a schematic diagram of a fixed bracket provided in an embodiment of the present invention.

[0046] Figure 5 This is a schematic diagram illustrating the working principle of the controller of the heat dissipation system provided in an embodiment of the present invention.

[0047] Figure 6 A flowchart illustrating a control method for a vehicle's cooling system provided in an embodiment of the present invention.

[0048] Figure 7 This is a schematic diagram of the overall control flow of a vehicle's cooling system provided in an embodiment of the present invention.

[0049] Figure 8 A flowchart of a single fan control provided for an embodiment of the present invention.

[0050] Reference numerals: 1-Radiator, 2-Cooling fan, 21-First fan, 22-Second fan, 23-Third fan, 24-Fourth fan, 25-Fifth fan, 26-Sixth fan, 3-Coolant inlet, 4-Coolant outlet, 5-First temperature sensor, 6-Second temperature sensor, 7-Third temperature sensor, 8-Fan mounting cover, 9-Fixing bracket, 10-Cooling fins, 11-Support rod, 901-First fixing rod, 902-Second fixing rod. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0052] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] As the background technology section states, with the demands of industrial development, the power of fuel cell stacks is increasing. Especially for commercial vehicles, the large amount of heat generated during operation requires support from higher-standard cooling systems. To ensure the cooling capacity of the cooling system, existing technologies often use high-power radiators, matched with multiple cooling fans or high-pressure fans to improve the cooling effect. However, these cooling systems are still based on the traditional vehicle cooling methods and have not been improved or optimized. As a result, their energy consumption is high, which affects the economy of commercial vehicles.

[0054] In the process of developing this invention, the applicant discovered that, due to the need for more powerful heat dissipation functions in the cooling systems of commercial vehicles, there is an increasing number of integrated cooling accessories, such as fuel cell stack accessories, electric drive axles, and domain control systems, all of which require heat dissipation to ensure that each component operates at its optimal temperature. However, these cooling accessories have even higher requirements for heat dissipation; that is, the operating temperature of each accessory needs to be lower than that required by the fuel cell stack, which poses a significant challenge to the precise control of the cooling system.

[0055] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0056] refer to Figure 1 , Figure 2 as well as Figure 3 , Figure 1 A front view of the heat dissipation system structure provided in an embodiment of the present invention. Figure 2 Side view of the heat dissipation system structure provided in the embodiment of the present invention. Figure 3 This is a rear view of the heat dissipation system structure provided in an embodiment of the present invention.

[0057] In this embodiment of the invention, the heat dissipation system structure includes a radiator 1, a cooling fan 2, a coolant inlet 3, a coolant outlet 4, a first temperature sensor 5, a second temperature sensor 6, a third temperature sensor 7, a fan mounting cover 8, a mounting bracket 9, heat dissipation fins 10, and a support rod 11.

[0058] Several cooling fans 2 are positioned facing the radiator 1. Coolant inlet 3 and coolant outlet 4 are respectively located at one end and the other end of the same side of the radiator 1. When the cooling fans 2 are suction-type fans, the mounting bracket 9 is located on the side of the radiator 1 away from the cooling fans 2; when the cooling fans 2 are blowing-type fans, the mounting bracket 9 is located between the radiator 1 and the cooling fans 2. At least one first temperature sensor 5 is mounted on the mounting bracket 9 at a position corresponding to the cooling fans 2; at least one second temperature sensor 6 is mounted on the radiator 1, corresponding to the first temperature sensor 5. The second temperature sensor 6 is located between adjacent cooling fins of the radiator 1. A third temperature sensor 7 is located at the coolant outlet 4.

[0059] As an optional embodiment, the heat dissipation system may include only at least one third temperature sensor 7, or it may include at least one or more first temperature sensors 5 and second temperature sensors 6, with the first temperature sensors 5, second temperature sensors 6, and cooling fans 2 arranged in a one-to-one correspondence. Alternatively, the projections of each cooling fan 2 onto the surface of the heat sink 1 can be used as the dividing area, and each dividing area may include multiple first temperature sensors 5 and second temperature sensors 6, with the projections of the first temperature sensors 5 and second temperature sensors 6 onto the surface of the heat sink 1 all falling within the same dividing area.

[0060] As an optional embodiment, the radiator 1 is used to circulate and dissipate heat to the target component through coolant; the cooling fan 2 is used to dissipate heat from the radiator 1; the first temperature sensor 5 is used to detect the ambient temperature around the radiator 1; the second temperature sensor 6 is used to detect the temperature of the coolant inside the radiator 1 during the circulating heat dissipation; and the third temperature sensor 7 is used to detect the target temperature of the coolant inside the radiator 1 after the circulating heat dissipation.

[0061] The cooling system also includes a controller, which controls several cooling fans to start working in a preset sequence based on the ambient temperature, coolant temperature and target temperature.

[0062] In this embodiment of the invention, the radiator 1 is used to dissipate heat from the target component using coolant. As the core component of the heat dissipation system, the radiator 1, through carefully designed heat dissipation fins 10 and efficient heat dissipation materials, can quickly dissipate heat, ensuring that the temperature of the target component remains stable below the set operating temperature threshold. Several cooling fans 2 are arranged facing the radiator 1 to provide flowing air to the radiator 1 for heat dissipation. The cooling fans 2 play an indispensable role in the heat dissipation system. They generate airflow through the rotation of the fan blades, accelerate airflow, and draw out or blow away hot air from the surface of the radiator 1, thereby effectively removing heat from the radiator 1 and improving the heat dissipation effect and efficiency of the heat dissipation system. The coolant inlet 3 and coolant outlet 4 are the starting and ending points of the coolant circulation in the heat dissipation system. They are indispensable components of the heat dissipation system and play a crucial role in many aspects such as coolant circulation, heat transfer and dissipation, temperature control, and system efficiency. During the circulation process, the coolant flows through the target component, carrying the heat absorbed from the target component to the radiator 1, and then dissipating the heat through the radiator 1, effectively controlling the operating temperature of the target component, preventing overheating, and maintaining the normal operation of the target component.

[0063] refer to Figure 2 The second temperature sensor 6 is embedded in the heat dissipation fins 10 of the radiator 1 and is set close to the water pipe of the radiator. Due to the strong thermal conductivity of the water pipe and heat dissipation fins 10 of the radiator 1, the temperature detected by the second temperature sensor 6 can be regarded as the temperature of the coolant in the water pipe of the radiator 1 at this point.

[0064] Specifically, the second temperature sensor 6 is embedded within the heat dissipation fins 10 of the radiator 1 and is positioned close to the coolant hoses of the radiator 1. This design allows the second temperature sensor 6 to operate without occupying additional space and to maintain full contact with the coolant hoses of the radiator 1. In this configuration, the second temperature sensor 6 can more accurately detect the surface temperature of the coolant corresponding to the area of ​​the cooling fan 2 it is located in. This embedded design of the second temperature sensor 6 provides more accurate and reliable temperature data, offering strong support for the correct operation of the controller.

[0065] refer to Figure 3 The heat dissipation system also includes a fixed bracket 9, with both ends of the fixed bracket 9 respectively set on the frame of the heat sink 1. There can be multiple fixed brackets 9, and at least two support rods 11 are arranged intersecting between two adjacent fixed brackets 9 to support the two adjacent fixed brackets. The at least two support rods 11 can rotate around the intersection point to adjust the included angle between the at least two support rods 11, thereby adjusting the relative distance between the two fixed brackets 9, that is, further adjusting the relative position of the first temperature sensor 5 relative to the heat sink 1 in the vertical direction.

[0066] Specifically, the fixing method between the fixing bracket 9 and the radiator 1 can be a snap-fit ​​fixing, where the fixing bracket 9 is inserted into a slot or hook to fix the two parts together, which usually allows for quick connection and disassembly; the fixing method between the fixing bracket 9 and the radiator 1 can also be bolt fixing, using screws and nuts, where rotating the screws makes the two fit tightly together, providing good fixation and making disassembly and installation relatively convenient; the fixing method between the fixing bracket 9 and the radiator 1 can also be welding fixing, which has better firmness and shock resistance. This connection will not loosen under heavy loads, vibrations, or temperature changes, effectively enhancing the structural strength and stability of the fixing bracket 9; the fixing bracket 9 can also improve the overall strength of the radiator 1, thereby avoiding cracking, deformation, and other failures during use, further extending the service life of the radiator 1, and improving the reliability and durability of the entire heat dissipation system.

[0067] Specifically, the first temperature sensor 5 can be embedded in the fixed bracket 9, which effectively encloses and protects the sensor, while also better securing the first temperature sensor 5 within the fixed bracket 9, ensuring that the first temperature sensor 5 can accurately detect the temperature value. Alternatively, the first temperature sensor 5 can be welded to the fixed bracket 9, which securely fixes the first temperature sensor 5 to the fixed bracket 9, preventing it from falling off due to temperature changes or vibration, effectively enhancing the stability of the first temperature sensor 5. The first temperature sensor 5 can also be mounted on the fixed bracket 9 using a pulley device, which moves on the fixed bracket 9 via pulleys and slide rails, allowing the position of the first temperature sensor 5 to be changed according to different operational needs, achieving more accurate temperature detection.

[0068] In this embodiment of the invention, when the cooling fan 2 is an intake-type cooling fan, the fixing bracket 9 is disposed on the side of the heat sink 1 away from the cooling fan 2 (e.g., Figure 2 (As shown). When the cooling fan 2 is an intake-type cooling fan, the mounting bracket 9 must take into account the fan's intake characteristics. In this case, the mounting bracket 9 should be designed and installed appropriately on the side of the radiator 1 furthest from the cooling fan 2. An intake-type cooling fan draws in hot air from the radiator 1 through the rotation of its blades facing the radiator 1 and exhausts the hot air through the rotation of its blades on the other side, thus achieving a cooling effect. When the cooling fan 2 is a blower-type cooling fan, the mounting bracket 9 must also take into account the fan's blower characteristics. In this case, the mounting bracket 9 should be designed and installed appropriately between the radiator 1 and the cooling fan 2 (not shown in the figure). A blower-type cooling fan blows hot air from the radiator 1 out of the radiator through the rotation of its blades facing the other side, thus achieving a cooling effect.

[0069] As an optional embodiment, the heat dissipation system also includes a fan mounting cover 8, which is correspondingly arranged with the heat sink 1, and a plurality of cooling fans 2 are fixed on the fan mounting cover 8.

[0070] Specifically, the fan mounting cover 8 is used to fix several cooling fans 2 to the radiator 1. The fans on the fan mounting cover 8 can be evenly distributed across the entire radiator 1; they can be clustered together to focus on cooling certain areas; or they can be unevenly distributed to cool certain areas individually. The distribution and number of cooling fans 2 can be adjusted according to different types of radiators 1 and the cooling needs of different vehicles.

[0071] Specifically, the fan mounting cover 8 and the heatsink 1 can be fixed by snap-fit, inserting it into a slot or using hooks to secure them together, which usually allows for quick connection and removal. Alternatively, the fan mounting cover 8 and the heatsink 1 can be fixed by bolts, using screws and nuts to tighten the fit by rotating the screws, which typically provides good stability and is relatively easy to install and remove. Furthermore, the fan mounting cover 8 and the heatsink 1 can also be fixed by welding or riveting, depending on the specific requirements.

[0072] refer to Figure 4 The fixed bracket 9 includes a second fixed rod 902 and a first fixed rod 901. One end of the second fixed rod 902 is vertically and slidably mounted on the first fixed rod 901. The second temperature sensor 6 is mounted on the other end of the second fixed rod 902. The other end of the second fixed rod 902 is inserted between adjacent heat dissipation fins 10 of the radiator 1. The first temperature sensor 5 is mounted on the first fixed rod 901.

[0073] As an optional embodiment, the first fixed rod 901 is provided with a slide rail, and the first temperature sensor 5 is provided with a pulley. The first temperature sensor 5 is slidably mounted on the slide rail of the first fixed rod 901 via the pulley. Alternatively, the first temperature sensor 5 can also be fixedly mounted at a preset position on the first fixed rod 901.

[0074] As an optional embodiment, the heat sink 1, cooling fan 2, first temperature sensor 5, second temperature sensor 6 and third temperature sensor 7 are all communicatively connected to the controller. The first temperature sensor 5, second temperature sensor 6 and third temperature sensor 7 can send the detected temperature values ​​to the controller in real time, so that the controller can make a comprehensive judgment based on these temperature values ​​and adjust the opening and closing sequence and speed of each fan at this time.

[0075] Specifically, the controller makes logical judgments based on the ambient temperature and coolant temperature, and determines the start-up sequence and duty cycle of each cooling fan 2 through set temperature thresholds or control logic. For example, when the temperature is too high, the controller will increase the voltage or current output, causing the fan speed to increase, thereby enhancing the heat dissipation effect; while when the temperature is low, the controller will correspondingly reduce the voltage or current output, causing the fan speed to decrease to save energy. By controlling the speed of the cooling fans 2, the heat dissipation effect can be precisely adjusted according to the temperature of the equipment or environment, thereby extending the service life of the heat sink 1. Furthermore, through a reasonable cooling fan 2 control strategy, energy consumption can be reduced while ensuring heat dissipation effect, which not only helps to reduce operating costs but also avoids unnecessary energy waste.

[0076] It should be noted that during the application of this embodiment of the invention, if hot air recirculation occurs when the vehicle is idling, this will reduce the temperature difference in a specific area. To address this, the speed of the cooling fan 2 in that area needs to be reduced to minimize the impact of hot air recirculation. Subsequently, due to the weakened heat dissipation capacity in that area, the temperature difference in the surrounding areas will increase, thereby prompting the speed of the cooling fan 2 to increase, enhancing the heat dissipation capacity of other areas. Throughout this process, the heat dissipation capacity of all areas remains at its optimal level, thus ensuring the lowest system energy consumption and best performance.

[0077] refer to Figure 5 This is a schematic diagram illustrating the working principle of the controller of the heat dissipation system provided in an embodiment of the present invention.

[0078] In this invention, the controller is used to control a plurality of cooling fans 2 (which may include fan A, fan B, ... fan F, etc.) to operate in a preset sequence to dissipate heat from the target component based on the target temperature, ambient temperature, and coolant temperature. Each sensor converts the detected target temperature, ambient temperature, and coolant temperature into analog signals, which are then transmitted to the controller and used as the basis for controlling the fan speed. The controller processes the received analog signals, such as amplifying and filtering them, and converts them into digital signals to ensure that subsequent logic circuits can perform calculations and analysis. Furthermore, the controller is also responsible for outputting control signals to drive the fans to control the speed of the target component according to the output signals.

[0079] It should be noted that the controller does not exist inside the heat dissipation system structure. It only communicates with the sensors and other components inside the heat dissipation system structure, receives information transmitted by the heat dissipation system, and responds accordingly to the information.

[0080] The vehicle cooling system provided by this invention mainly includes a radiator for circulating coolant to cool target components; several cooling fans for cooling the radiator; the radiator is equipped with a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor detects the ambient temperature around the radiator; the second temperature sensor detects the coolant temperature inside the radiator during circulation; the third temperature sensor detects the target temperature of the coolant inside the radiator after circulation; and a controller controls the cooling fans to operate in a preset sequence based on the ambient temperature, coolant temperature, and target temperature. This invention improves the overall performance of the cooling system by analyzing, optimizing, and improving its inherent characteristics, and by utilizing the close cooperation and efficient collaboration between the radiator, cooling fans, temperature sensors, and controller. Furthermore, it precisely controls the cooling fans in the cooling system to address potential temperature unevenness on the radiator surface. This refined control not only helps reduce the energy consumed by the cooling system but also significantly improves the vehicle's range, providing drivers with a more economical and environmentally friendly driving experience.

[0081] Based on the same inventive concept, corresponding to the vehicle cooling system provided in any of the above embodiments, the present invention also provides a control method for a vehicle cooling system.

[0082] refer to Figure 6 This is a flowchart of a control method for a vehicle cooling system provided in an embodiment of the present invention.

[0083] Step S601: Obtain the operating temperature of the target component, confirm whether the operating temperature exceeds the preset operating temperature threshold, and in response to the operating temperature exceeding the preset operating temperature threshold, turn on the radiator water pump.

[0084] Step S602: Obtain the ambient temperature and coolant temperature.

[0085] Step S603: For several cooling fans, calculate the difference between the coolant temperature and the ambient temperature to obtain several coolant-fan temperature difference values.

[0086] Step S604: Sort several liquid-air temperature difference values ​​in descending order to obtain a preset order for several cooling fans.

[0087] Step S605: Control several cooling fans to start working in a preset sequence.

[0088] Specifically, the controller acquires the operating temperature of each target component and determines whether the operating temperature exceeds the preset operating temperature threshold. When the operating temperature of the target component exceeds the preset operating temperature threshold, the controller controls the radiator water pump to start.

[0089] With the radiator water pump running, the controller continuously monitors the temperatures of the target components. The third temperature sensor detects the target temperature of the coolant inside the radiator after circulation and heat dissipation. When the target temperature exceeds a preset target temperature threshold, the controller reads the ambient temperature around the radiator detected by the first temperature sensor and the coolant temperature inside the radiator during circulation and heat dissipation detected by the second temperature sensor. The controller calculates the liquid-air temperature difference between the coolant temperature and the ambient temperature, obtaining several liquid-air temperature difference values. These values ​​are then sorted in descending order to obtain a preset sequence for several cooling fans. The controller then activates the cooling fans sequentially according to the preset sequence.

[0090] As an optional embodiment, controlling the operation of several cooling fans in a preset order includes: in response to turning on any cooling fan, confirming whether the target temperature is not greater than a preset target temperature threshold; in response to the target temperature being greater than the preset target temperature threshold, turning on the next cooling fan adjacent to the first cooling fan in the preset order.

[0091] As an optional embodiment, in response to turning on any cooling fan, a preset temperature difference range corresponding to the liquid-air temperature difference value of the cooling fan is determined, and the fan duty cycle of the cooling fan is controlled according to the preset temperature difference range.

[0092] As an optional embodiment, when the operating temperature of the target component is detected to be within the preset operating temperature threshold, the controller continues to monitor whether the operating temperature of each target component exceeds the preset operating temperature threshold and performs corresponding processing.

[0093] As an optional embodiment, when the target temperature is not greater than a preset target temperature threshold, the controller controls the cooling function to be turned off.

[0094] The control method for the vehicle cooling system provided by the present invention will now be described with more specific embodiments.

[0095] refer to Figure 7 This is a schematic diagram of the overall control flow of the vehicle cooling system provided in an embodiment of the present invention.

[0096] When the cooling function of the heat dissipation system is activated, the controller receives the operating temperature of each target component and determines whether the operating temperature of the target component exceeds a preset operating temperature threshold. If the operating temperature of the target component exceeds the preset operating temperature threshold, the controller controls the water pump of the radiator to run to cool the target component. During this process, the controller obtains the target temperature of the coolant outlet in real time and determines whether the target temperature exceeds the preset target temperature threshold. If the target temperature does not exceed the preset target temperature threshold, it proves that the radiator can efficiently dissipate heat from the target component on its own. If the target temperature exceeds the preset target temperature threshold, it proves that the radiator may be experiencing problems due to prolonged operation. In cases of overload or reduced heat dissipation efficiency, cooling fans are needed to cool the radiator. Further, the controller obtains the ambient temperature measured by the first temperature sensor corresponding to each fan and the coolant temperature measured by the second temperature sensor of the radiator. It calculates the liquid-air temperature difference between the ambient temperature and the coolant temperature and sorts all the liquid-air temperature difference values ​​to obtain at least one preset order for several cooling fans. Preferably, each cooling fan corresponds to one first temperature sensor and one second temperature sensor. Therefore, each cooling fan corresponds to one liquid-air temperature difference value, that is, all cooling fans correspond to a preset order. The sorting of the liquid-air temperature difference values ​​can be ascending or descending.

[0097] Specifically, the liquid-air temperature difference of the cooling fans is sorted in descending order: assuming the radiator has six cooling fans, namely fan 21, fan 22, fan 23, fan 24, fan 25, and fan 26 (for reference). Figure 1 The temperature difference between the liquid and air at each fan location is recorded as follows: , , , , , At this point, the liquid-air temperature difference values ​​are sorted in descending order and recorded as:

[0098]

[0099] At this point, the parts with the largest liquid-air temperature difference should be turned on first, and the parts with the smallest liquid-air temperature difference should be turned on last. This ensures that the parts with the larger liquid-air temperature difference can dissipate heat first, thus making the heat dissipation process more complete and effective.

[0100] Specifically, the liquid-air temperature difference value of the cooling fan can also be sorted in ascending order: that is, the liquid-air temperature difference value is sorted in ascending order and denoted as:

[0101]

[0102] At this point, the switches should be turned on in reverse order, that is, the switch with the smallest liquid-air temperature difference should be turned on last, and the switch with the largest liquid-air temperature difference should be turned on first, so as to ensure that the switch with the larger liquid-air temperature difference can dissipate heat first, thereby making the heat dissipation process more complete and effective.

[0103] Meanwhile, when applying the embodiments of the present invention, when the vehicle is idling and hot air recirculation occurs, the liquid-air temperature difference in the corresponding area will decrease. At this time, the speed of the cooling fan in that area will decrease, and the speed of the cooling fan needs to be reduced to reduce hot air recirculation. After the heat dissipation capacity in that area decreases, the liquid-air temperature difference in the surrounding area will increase, the speed of the cooling fan 2 will increase, and the heat dissipation capacity in other areas will be improved. At this time, the heat dissipation capacity of all areas will still be maintained at the optimal state, so as to achieve the lowest energy consumption and the best performance of the system.

[0104] Specifically, after any cooling fan is turned on, it is determined whether the target temperature is not greater than the preset target temperature threshold. If the target temperature is greater than the preset target temperature threshold, the next cooling fan adjacent to the current cooling fan in the preset order is turned on in the preset order, and so on, turning on other cooling fans one by one.

[0105] Specifically, when any cooling fan is turned on, it is determined whether the target temperature is not greater than the preset target temperature threshold. If the target temperature is not greater than the preset target temperature threshold, the next cooling fan in the preset sequence will not be turned on. At this time, the controller continues to monitor whether the operating temperature of each target component exceeds the preset operating temperature threshold.

[0106] Specifically, after all cooling fans are turned on, the detected target temperature is not greater than the preset target temperature threshold. If the target temperature is greater than the preset target temperature threshold, the ambient temperature and coolant temperature are obtained again, and the coolant-air temperature difference is calculated again. The cooling fans are then turned on to keep them running and continuously dissipate heat from the radiator.

[0107] refer to Figure 8 This is a flowchart of a single fan control provided in an embodiment of the present invention.

[0108] As an optional embodiment, the first fan 21 is taken as an example (see reference). Figure 1 When the first fan 21 is turned on, a preset temperature difference range corresponding to the liquid-air temperature difference value of the cooling fan is determined, and the fan duty cycle of the cooling fan is controlled according to the preset temperature difference range.

[0109] Specifically, when the fan is turned on, the ambient temperature of the radiator detected by the first temperature sensor and the corresponding coolant temperature are read, the difference between the ambient temperature and the coolant temperature is calculated, and the liquid-air temperature difference is obtained; the range of the liquid-air temperature difference is set, thereby strategically adjusting the duty cycle of the cooling fan.

[0110] In this embodiment of the invention, the liquid-air temperature difference is preferably measured in degrees Celsius (°C). When the liquid-air temperature difference is between 0°C and 3°C, the duty cycle of the corresponding cooling fan is controlled at 30%; when the liquid-air temperature difference is between 3°C and 5°C, the duty cycle of the corresponding cooling fan is controlled at 50%; when the liquid-air temperature difference is between 5°C and 10°C, the duty cycle of the corresponding cooling fan is controlled at 80%; and when the liquid-air temperature difference is greater than 10°C, the duty cycle of the corresponding cooling fan is controlled at 100%.

[0111] It should be noted that the fan duty cycle refers to the proportion of the high-level signal in the PWM (Pulse Width Modulation) signal used to control the fan speed. The duty cycle directly affects the fan's supply voltage and speed. By adjusting the duty cycle of the PWM signal, the fan speed can be precisely controlled, thereby achieving a balance between heat dissipation and energy consumption.

[0112] The vehicle cooling system control method provided by this invention first acquires the operating temperature of the target component and confirms whether the operating temperature exceeds a preset operating temperature threshold. If the operating temperature exceeds the preset operating temperature threshold, the radiator water pump is activated. Further, the ambient temperature and coolant temperature are acquired. For several cooling fans, the difference between the coolant temperature and the ambient temperature is calculated to obtain several coolant-fan temperature difference values. These coolant-fan temperature difference values ​​are sorted in descending order to obtain a preset sequence for the cooling fans. The cooling fans are then controlled to start operating in the preset sequence. This invention can improve the overall performance of the cooling system by analyzing, optimizing, and improving its inherent characteristics, and by utilizing the close cooperation and efficient collaboration between the radiator, cooling fans, temperature sensors, and controller. Simultaneously, it precisely controls the cooling fans in the cooling system to address potential temperature unevenness on the radiator surface. This refined control not only helps reduce the energy consumed by the cooling system but also significantly improves the vehicle's range, providing drivers with a more economical and environmentally friendly driving experience.

[0113] It should be noted that the method of this embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this embodiment, and the multiple devices will interact with each other to complete the method.

[0114] It should be noted that the above description describes some embodiments of the present invention. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims may be performed in a different order than that shown in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0115] Based on the same inventive concept, the present invention also proposes a vehicle including the aforementioned vehicle cooling system, wherein the vehicle cooling system is used to execute the aforementioned vehicle cooling system control method.

[0116] This invention provides a vehicle that improves the overall performance of its cooling system by analyzing, optimizing, and improving its inherent characteristics. This is achieved through close cooperation and efficient coordination between the radiator, cooling fan, temperature sensor, and controller. Furthermore, to address potential temperature unevenness on the radiator surface, the cooling fan is precisely controlled. This refined control not only helps reduce the energy consumed by the cooling system but also significantly improves its driving range, providing drivers with a more economical and environmentally friendly driving experience.

[0117] Furthermore, although the operations of the method of the present invention are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all of the operations shown must be performed to achieve the desired result. Rather, the steps depicted in the flowchart may be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0118] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by those skilled in the art. The terms "first," "second," and similar terms used in the embodiments of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0119] While the spirit and principles of the invention have been described with reference to several specific embodiments, it should be understood that the invention is not limited to the disclosed specific embodiments, and the division of aspects does not imply that features in these aspects cannot be combined for benefit; such division is merely for ease of description. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the appended claims is to be interpreted in the broadest sense, thereby encompassing all such modifications and equivalent structures and functions.

Claims

1. A control method of a heat dissipation system of a vehicle, the heat dissipation system of the vehicle comprising a radiator for circulating heat dissipation of a target component, a plurality of heat dissipation fans for heat dissipation of the radiator, a first temperature sensor for detecting an ambient temperature around the radiator, and a second temperature sensor for detecting a coolant temperature of a coolant circulating in the heat dissipation of the radiator, characterized in that, The method comprises the following steps: acquiring the working temperature of the target component, determining whether the working temperature exceeds a preset working temperature threshold, and starting a radiator water pump in response to the working temperature exceeding the preset working temperature threshold; acquiring an ambient temperature and a cooling liquid temperature; for a plurality of cooling fans, calculating the difference between the cooling liquid temperature and the ambient temperature to obtain a plurality of liquid-air temperature differences; sorting the plurality of liquid-air temperature differences in descending order to obtain a preset order for the plurality of cooling fans; controlling the plurality of cooling fans to start working in the preset order.

2. The control method of a heat dissipating system of a vehicle according to claim 1, further comprising a third temperature sensor for detecting a target temperature of the coolant inside the radiator after the coolant is circulated and cooled, wherein Before the step of acquiring the ambient temperature and the cooling liquid temperature, the method further comprises the following steps: acquiring a target temperature; determining whether the target temperature is greater than a preset target temperature threshold; in response to the target temperature being greater than the preset target temperature threshold, acquiring the ambient temperature and the cooling liquid temperature.

3. The control method of a heat radiating system of a vehicle according to claim 2, characterized by, The step of controlling the plurality of cooling fans to start working in the preset order comprises the following steps: in response to starting any one of the cooling fans, determining whether the target temperature is not greater than the preset target temperature threshold; in response to the target temperature being greater than the preset target temperature threshold, starting the next cooling fan adjacent to the cooling fan in the preset order.

4. The control method of a heat radiating system of a vehicle according to claim 3, characterized by, The method further comprises the following steps: in response to starting any one of the cooling fans, determining a preset temperature difference range corresponding to the liquid-air temperature difference corresponding to the cooling fan, and controlling the fan duty cycle of the cooling fan according to the preset temperature difference range.

5. A heat dissipation system of a vehicle, characterized by, The method comprises the following steps: a radiator (1) for circulating heat dissipation of a target component by a cooling liquid; a plurality of cooling fans (2) for dissipating heat from the radiator (1); the radiator (1) is provided with a first temperature sensor (5), a second temperature sensor (6), and a third temperature sensor (7), the first temperature sensor (5) is used to detect the ambient temperature around the radiator (1); the second temperature sensor (6) is used to detect the cooling liquid temperature of the cooling liquid in the circulating heat dissipation inside the radiator (1); the third temperature sensor (7) is used to detect the target temperature of the cooling liquid after circulating heat dissipation inside the radiator (1), wherein the plurality of cooling fans (2) are projected on the surface of the radiator (1) as a divided region, and the first temperature sensor (5), the second temperature sensor (6), and the cooling fan (2) are one-to-one correspondingly arranged; a controller is used to control the plurality of cooling fans (2) to start working in a preset order according to the ambient temperature, the cooling liquid temperature, and the target temperature, wherein the preset order is a descending or ascending order sorting result of the plurality of liquid-air temperature differences between the ambient temperature and the cooling liquid temperature corresponding to the plurality of cooling fans.

6. The heat dissipation system of a vehicle according to claim 5, characterized by, The radiator (1) is provided with a cooling liquid inlet (3) for inputting cooling liquid into the radiator (1) and a cooling liquid outlet (4) for discharging the cooling liquid after heat dissipation by circulation; the third temperature sensor (7) is arranged at the cooling liquid outlet (4).

7. The heat dissipation system of a vehicle according to claim 5, characterized by, Further comprising a fixing support (9); When the heat dissipation fan (2) is a suction type heat dissipation fan, the fixing support (9) is arranged on the side of the radiator (1) away from the heat dissipation fan (2); When the heat dissipation fan (2) is a blowing type heat dissipation fan, the fixing support (9) is arranged between the radiator (1) and the heat dissipation fan (2).

8. The heat dissipation system of a vehicle according to claim 7, characterized by, At least one first temperature sensor (5) is arranged on the fixing support (9) at a position corresponding to the heat dissipation fan (2); at least one second temperature sensor (6) is arranged on the radiator (1); the second temperature sensor (6) corresponds to the first temperature sensor (5).

9. The heat dissipation system of a vehicle according to claim 8, characterized by, The second temperature sensor (6) is arranged between adjacent heat dissipation fins (10) of the radiator (1).

10. The heat dissipation system of a vehicle according to claim 9, characterized by, The fixing support (9) comprises a first fixing rod (901) and a second fixing rod (902), both ends of the first fixing rod (901) are arranged on the frame of the radiator (1), the second fixing rod (902) has a first end and a second end, the first end is movably arranged on the first fixing rod (901), the second end is inserted between adjacent heat dissipation fins (10) of the radiator (1), and the second temperature sensor (6) is arranged at the second end of the second fixing rod (902).

11. The heat dissipation system of a vehicle according to claim 10, characterized by, The first temperature sensor (5) is arranged on the first fixing rod (901), the first fixing rod (901) is provided with a sliding rail, and the first temperature sensor (5) is provided with a pulley, so that the position of the first temperature sensor (5) on the first fixing rod (901) is adjustable.

12. The heat dissipation system of a vehicle according to claim 11, characterized by, There are a plurality of fixing supports (9), at least two supporting rods (11) for supporting the adjacent two fixing supports (9) are arranged between the adjacent two fixing supports (9) in a cross manner, and the at least two supporting rods (11) can rotate around the intersection point as the center to adjust the included angle between the at least two supporting rods (11).

13. A vehicle characterized by comprising: The heat dissipation system of the vehicle comprises the heat dissipation system of the vehicle according to any one of claims 5-12, and is used to execute the control method of the heat dissipation system of the vehicle according to any one of claims 1-4.

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