Engineering vehicle radiator cleaning method and device and engineering vehicle
By acquiring and calculating the actual operating conditions of the radiator of the engineering vehicle, the self-cleaning timing can be accurately determined, solving the problem of inaccurate self-cleaning timing selection in the existing technology, and realizing stable operation and efficient work of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-04-07
AI Technical Summary
The timing of self-cleaning of existing engineering vehicle radiators is not accurate enough, resulting in premature or untimely self-cleaning operations, which affects the stable operation and work efficiency of the equipment.
By acquiring the actual inlet and outlet water temperatures, water flow rate, and fan operating conditions of the radiator, the actual heat exchange and fan rotation direction are calculated. Based on the difference and trend between the actual operating conditions and the standard operating conditions, the timing of self-cleaning is determined, and the fan is controlled to reverse for self-cleaning.
Accurately assess the radiator's operating status to avoid premature or untimely self-cleaning operations, ensuring stable equipment operation and work efficiency.
Smart Images
Figure CN121804232A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engineering machinery technology, and more specifically, to a method, apparatus, and engineering vehicle for cleaning radiators. Background Technology
[0002] The working environment in the construction machinery industry is mostly dusty or contains a lot of flying debris. When the radiator of a construction vehicle is operating, the fan blows air over the radiator. When the air carries dust or flying debris over the radiator surface, it adheres to the surface. Over time, this accumulation significantly affects the radiator's heat dissipation efficiency, leading to poor heat dissipation, overheating, and even equipment damage. A common solution is to reverse the direction of the fan's airflow towards the radiator to facilitate its self-cleaning.
[0003] However, current methods for controlling the fan to reverse for self-cleaning are often rather rough and inaccurate. For example, self-cleaning may be performed for a certain period of time upon startup, or it may be performed according to a fixed preset cycle during operation. Alternatively, self-cleaning may be determined simply by the pressure difference between the air intake and exhaust sides of the radiator, or the driver may manually control self-cleaning based on personal experience. These methods cannot scientifically detect and evaluate the timing of radiator self-cleaning, leading to unnecessary self-cleaning operations performed prematurely or failure to perform self-cleaning in a timely manner, resulting in overheating or even damage to the equipment. This seriously affects the stable operation and work efficiency of engineering vehicles. Summary of the Invention
[0004] The present invention aims to provide a method, apparatus, and vehicle for cleaning radiators of engineering vehicles, which can accurately detect and determine the timing of radiator self-cleaning, effectively avoiding unnecessary self-cleaning of the radiator too early or failure to self-clean in time, which could lead to overheating or even damage to the equipment, thereby ensuring the stable operation and working efficiency of the engineering vehicle.
[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a method for cleaning the radiator of an engineering vehicle, comprising: Obtain the actual inlet water temperature, actual outlet water temperature, actual water flow rate, and actual operating conditions of the fan for the radiator; The actual heat exchange of the radiator is calculated based on the actual inlet water temperature, actual outlet water temperature, and actual water flow rate of the radiator. The rotation direction of the fan is controlled based on the actual heat exchange of the radiator and the actual operating conditions of the fan.
[0006] In an optional implementation, the step of "controlling the rotation direction of the fan based on the actual heat exchange of the radiator and the actual operating conditions of the fan" specifically includes: Determine whether the ratio of the difference between the actual heat exchange and the standard heat exchange of the radiator to the standard heat exchange is greater than a first threshold. If so, the rotation direction of the fan is controlled according to the actual operating conditions of the fan and the changing trend of the actual heat exchange of the radiator.
[0007] In an optional implementation, the step of "controlling the rotation direction of the fan according to the actual operating conditions of the fan and the changing trend of the actual heat exchange of the radiator" specifically includes: Determine whether the ratio of the difference between the actual operating condition and the standard operating condition of the fan to the standard operating condition is greater than a second threshold. If so, the rotation direction of the fan is controlled according to the changing trend of the actual heat exchange of the radiator and the changing trend of the actual operating conditions of the fan.
[0008] In an optional implementation, the step of "controlling the rotation direction of the fan according to the changing trend of the actual heat exchange of the radiator and the changing trend of the actual operating conditions of the fan" specifically includes: Determine whether the actual heat exchange of the radiator decreases in a stepwise manner and whether the actual operating conditions of the fan increase in a stepwise manner; If so, control the fan to reverse in order to perform self-cleaning on the heat sink.
[0009] In an optional implementation, the step of "controlling the fan to reverse in order to self-clean the heat sink" further includes: After the self-cleaning preset time, determine whether the actual heat exchange of the radiator continues to decrease or whether the actual operating conditions of the fan continue to increase; If so, the control prompt will instruct the driver to stop the machine and perform manual cleaning.
[0010] In an optional implementation, the first threshold is 5% and the second threshold is 3%.
[0011] In an optional implementation, the actual operating condition of the fan is the actual operating current or the actual airflow efficiency of the fan.
[0012] In an optional implementation, the actual water flow rate of the radiator is obtained based on the correspondence between the duty cycle of the water pump connected to the radiator and the water flow rate.
[0013] Secondly, the present invention provides a radiator cleaning device for engineering vehicles, comprising: The acquisition module is used to acquire the actual inlet water temperature, actual outlet water temperature, actual water flow rate, and actual operating conditions of the fan of the radiator; The calculation module is used to calculate the actual heat exchange of the radiator based on the actual inlet water temperature, actual outlet water temperature, and actual water flow rate of the radiator. The control module is used to control the rotation direction of the fan based on the actual heat exchange of the radiator and the actual operating conditions of the fan.
[0014] Thirdly, the present invention provides an engineering vehicle including a controller, the controller being used to perform the engineering vehicle radiator cleaning method according to any of the foregoing embodiments.
[0015] The beneficial effects of the cleaning method, apparatus, and engineering vehicle radiator of the present invention provided in the embodiments of the present invention include: The timing for self-cleaning of the radiator in this engineering vehicle is determined by the actual heat dissipation of the radiator and the actual operating conditions of the fan. By assessing the actual heat dissipation of the radiator and the actual operating conditions of the fan, the operating status and workload of the engineering vehicle's cooling system can be accurately judged. Therefore, by evaluating both factors to determine the timing of self-cleaning and performing it in a timely manner, it is possible to effectively avoid unnecessary self-cleaning of the radiator too early or failure to perform self-cleaning in a timely manner, which could lead to overheating or even damage to the equipment. This ensures both stable operation and work efficiency of the engineering vehicle. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A schematic diagram of an engineering vehicle in normal working mode according to an embodiment of the present invention; Figure 2 A schematic diagram of an engineering vehicle in self-cleaning working mode provided in an embodiment of the present invention; Figure 3 A control block diagram of an engineering vehicle provided in an embodiment of the present invention; Figure 4 A table showing the standard heat dissipation of a radiator provided for embodiments of the present invention; Figure 5 A flowchart of a method for cleaning the radiator of an engineering vehicle provided in an embodiment of the present invention; Figure 6 for Figure 5 The flowchart of the sub-steps of step S300 in the process; Figure 7 This is a structural block diagram of a radiator cleaning device for engineering vehicles provided in an embodiment of the present invention.
[0018] Icons: 100 - Radiator; 200 - Fan; 300 - Water Pump; 400 - Controller; 410 - Inlet Water Temperature Sensor; 420 - Outlet Water Temperature Sensor; 430 - Inlet Air Temperature Sensor; 440 - Outlet Air Temperature Sensor; 500 - Acquisition Module; 600 - Calculation Module; 700 - Control Module. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.
[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0022] In existing technologies, the timing of radiator self-cleaning in engineering vehicles is often rather rough and inaccurate. Some methods involve self-cleaning at fixed preset intervals during operation. However, the heat dissipation and workload of engineering vehicles vary depending on the location and time. This approach can easily lead to the radiator performing unnecessary self-cleaning prematurely, affecting equipment efficiency, or failing to perform self-cleaning when it should, resulting in overheating or even damage. Other methods simply rely on the pressure difference between the radiator's inlet and outlet sides to determine whether self-cleaning is necessary. This method also easily leads to unnecessary self-cleaning prematurely, as the pressure difference does not accurately reflect the radiator's actual operating conditions. Still others involve the driver manually controlling self-cleaning based on personal experience. This method relies on the driver's subjective feelings and experience, making it even more difficult to accurately control the timing of self-cleaning, seriously affecting the stable operation and work efficiency of engineering vehicles.
[0023] In response to the above situation, the present invention provides a new engineering vehicle. The radiator cleaning method and device used in the vehicle determine the timing of controlling the fan to reverse for self-cleaning based on the actual heat dissipation of the radiator and the actual operating conditions of the fan. By accurately judging the operating status and workload of the cooling system of the engineering vehicle through the actual heat dissipation of the radiator and the actual operating conditions of the fan, the timing of self-cleaning can be determined by these two factors and the self-cleaning operation can be performed in a timely manner. This can effectively avoid the radiator from performing unnecessary self-cleaning too early or failing to perform self-cleaning in a timely manner, which could lead to overheating or even damage to the equipment. This ensures both the stable operation and working efficiency of the engineering vehicle.
[0024] To make the technical solution of the present invention easier to understand, the overall structure, working principle and technical effects of the engineering vehicle and its matching radiator cleaning method and device provided by the present invention will be described in detail below with reference to the accompanying drawings.
[0025] Please refer to Figure 1 , Figure 2 and Figure 3 The engineering vehicle provided in this embodiment of the invention can be an excavator, bulldozer, road roller, crane, etc. This engineering vehicle includes a radiator 100, a water pump 300, a fan 200, a controller 400, an inlet water temperature sensor 410, an outlet water temperature sensor 420, an inlet air temperature sensor 430, and an outlet air temperature sensor 440.
[0026] The radiator 100 is connected to the water pump 300, which powers the flow of water (or other cooling medium) within the radiator 100. The fan 200 is positioned opposite the radiator 100. In normal operation, the fan 200 rotates clockwise, and airflow enters the radiator 100 from the side away from the fan 200 and exits from the side of the radiator 100 closest to the fan 200 (see...). Figure 1 (The arrows in the diagram indicate the direction of airflow), thereby exchanging heat and cooling the water flowing through the radiator 100 to ensure the normal operation of the related equipment. In self-cleaning mode, the fan 200 reverses direction, and airflow enters from the side of the radiator 100 closest to the fan 200 and then exits from the side of the radiator 100 away from the fan 200 (see...). Figure 2 (The arrows in the diagram indicate the direction of airflow), thereby blowing away and removing dust and other debris attached to the radiator 100, improving its clogging condition.
[0027] The inlet water temperature sensor 410 is located at the inlet of the radiator 100 to detect the actual inlet water temperature of the radiator 100; the outlet water temperature sensor 420 is located at the outlet of the radiator 100 to detect the actual outlet water temperature of the radiator 100; the inlet air temperature sensor 430 is located on the air inlet side of the radiator 100 to detect the actual inlet air temperature of the radiator 100; and the outlet air temperature sensor 440 is located on the air outlet side of the radiator 100 to detect the actual outlet air temperature of the radiator 100.
[0028] The controller 400 is electrically connected to the fan 200, the water pump 300, the inlet water temperature sensor 410, the outlet water temperature sensor 420, the inlet air temperature sensor 430, and the outlet air temperature sensor 440 to obtain the actual operating conditions of the fan 200, such as current and voltage, the operating conditions of the water pump 300, such as current and duty cycle, and the actual inlet water temperature, actual outlet water temperature, actual inlet air temperature, and actual outlet air temperature of the radiator 100.
[0029] Furthermore, the controller 400 also communicates with the cloud server via a wireless module to obtain data stored on the cloud server, such as the standard heat dissipation of the radiator 100, the standard operating conditions of the fan 200, the correspondence between the duty cycle and water flow of the water pump 300, and the correspondence between the duty cycle and airflow of the fan 200. The standard heat dissipation of the radiator 100 and the standard operating conditions (actual operating current or actual airflow efficiency) of the fan 200 can be obtained based on experience, simulation, or actual measurement and pre-stored on the cloud server (see [link to relevant documentation]). Figure 4 , Figure 4 The table is an example of the standard heat dissipation of radiator 100. The corresponding standard heat dissipation can be found in the table based on the actual inlet water temperature, actual outlet water temperature, and actual water flow rate.
[0030] The controller 400 acquires the actual inlet water temperature, actual outlet water temperature, actual water flow rate of the radiator 100, and the actual operating conditions of the fan 200. It then calculates the actual heat exchange of the radiator 100 based on these parameters. Finally, it controls the rotation direction of the fan 200 based on the actual heat exchange of the radiator 100 and the actual operating conditions of the fan 200. The actual heat dissipation of the radiator 100 and the actual operating conditions of the fan 200 accurately reflect the operating status and workload of the engineering vehicle's cooling system. This control effectively prevents the radiator 100 from prematurely performing unnecessary self-cleaning or failing to perform self-cleaning in a timely manner, which could lead to overheating or even damage. This balances the stable operation and work efficiency of the engineering vehicle.
[0031] This invention also provides a method for cleaning the radiator of an engineering vehicle, which can be used in the aforementioned engineering vehicle. It is executed by a controller 400 to control the rotation direction of the fan 200 and switch between normal working mode and self-cleaning working mode.
[0032] For details, please refer to Figure 5 and Figure 6 The cleaning method for the vehicle radiators in this project specifically includes the following steps: Step S100: Obtain the actual inlet water temperature, actual outlet water temperature, actual water flow rate of the radiator 100, and the actual operating conditions of the fan 200.
[0033] The actual inlet water temperature is detected by the inlet water temperature sensor 410 and sent to the controller 400, and the actual outlet water temperature is detected by the outlet water temperature sensor 420 and sent to the controller 400. The actual water flow rate can be estimated and determined by the duty cycle of the water pump 300 obtained by the controller 400 and the correspondence between the duty cycle of the water pump 300 and the water flow rate. The actual operating condition of the fan 200 can be either the actual operating current of the fan 200 or the actual airflow efficiency of the fan 200. The actual operating current can be directly obtained from the fan 200 by the controller 400, while the actual airflow efficiency can be calculated from the actual operating current and actual operating voltage obtained from the fan 200 (actual airflow efficiency = actual operating current * actual operating voltage * efficiency, where efficiency is a constant and an empirical value). The actual operating current and actual airflow efficiency of the fan 200 are directly proportional.
[0034] Step S200: Calculate the actual heat exchange of radiator 100 based on the actual inlet water temperature, actual outlet water temperature, and actual water flow rate of radiator 100.
[0035] The actual heat exchange is calculated using the standard heat exchange formula: Q = cmΔT. Here, Q is the actual heat exchange, c is the specific heat capacity of water, m is the actual water flow rate, and ΔT is the difference between the actual inlet and outlet water temperatures.
[0036] It should be noted that, while calculating the actual heat exchange of radiator 100 based on the actual inlet water temperature, actual outlet water temperature, and actual water flow rate, the actual heat exchange of radiator 100 can also be calculated based on the actual inlet air temperature, actual outlet air temperature, and actual air volume. The calculation formula is Q'=c'm'△T'. Here, Q' is the actual heat exchange, c' is the specific heat capacity of air, m' is the actual air volume, which can be obtained by controller 400 based on the duty cycle of fan 200 and the correspondence between the fan 200's duty cycle and air volume, and △T' is the difference between the actual outlet air temperature and the actual inlet air temperature. The two actual heat exchange values, Q and Q', should theoretically be equal. Therefore, Q' can be used to verify Q to ensure its accuracy. If the difference is too large, it indicates that the calculation of Q may be incorrect, and it can be recalculated and verified until they are equal or the difference is within a reasonable range before proceeding with subsequent steps.
[0037] Step S300: Control the rotation direction of the fan 200 according to the actual heat exchange of the radiator 100 and the actual operating conditions of the fan 200.
[0038] In detail, step S300 specifically includes: Step S310: Determine whether the ratio of the difference between the actual heat exchange and the standard heat exchange of the radiator 100 and the standard heat exchange is greater than a first threshold. In this embodiment, the first threshold can be 5%. That is, determine whether the actual heat exchange is less than 95% of the standard heat exchange.
[0039] If not, it indicates that the actual heat exchange is not much different from the standard heat exchange, the equipment has good heat dissipation and can work normally, so return to step S100.
[0040] If so, it indicates that the actual heat exchange differs significantly from the standard heat exchange, and further judgment is needed on whether a self-cleaning operation is required. Therefore, step S311 is executed: control the rotation direction of the fan 200 according to the actual operating conditions of the fan 200 and the changing trend of the actual heat exchange of the radiator 100.
[0041] Furthermore, step S311 specifically includes: Step S320: Determine whether the ratio of the difference between the actual operating condition and the standard operating condition of the fan 200 to the standard operating condition is greater than a second threshold. In this embodiment, the second threshold is 3%. That is, determine whether the actual operating current or actual airflow efficiency of the fan 200 is greater than 103% of the standard operating current or standard airflow efficiency.
[0042] If not, it means that the actual operating current of fan 200 is not much different from the standard operating current, or the actual wind efficiency is not much different from the standard wind efficiency, and the equipment can work normally. Therefore, return to step S100.
[0043] If so, it indicates that the actual operating current of fan 200 differs significantly from the standard operating current, or the actual airflow efficiency differs significantly from the standard airflow efficiency, requiring further judgment on whether to perform a self-cleaning operation. Therefore, step S321 is executed: the rotation direction of fan 200 is controlled according to the changing trend of the actual heat exchange of radiator 100 and the changing trend of the actual operating conditions of fan 200.
[0044] Furthermore, step S321 specifically includes: Step S330: Determine whether the actual heat exchange of the radiator 100 decreases in a stepwise manner and whether the actual operating conditions of the fan 200 increase in a stepwise manner. Whether the actual heat exchange of the radiator 100 and the actual operating conditions of the fan 200 change in a stepwise manner indicates the equipment heat dissipation and workload of the engineering vehicle.
[0045] If not, it means that the heat dissipation and workload of the engineering vehicle are within an acceptable range. At this time, even if the actual heat exchange of the radiator 100 deviates significantly from the standard heat exchange and the actual operating conditions of the fan 200 deviate significantly from the standard operating conditions, the relevant equipment of the engineering vehicle can still continue to operate normally. In order to avoid affecting the working efficiency of the engineering vehicle and delaying the construction period, it is not necessary to perform self-cleaning work immediately. Therefore, return to step S100.
[0046] If so, it indicates that the heat dissipation and workload of the engineering vehicle's equipment are beyond acceptable limits. In this case, a self-cleaning operation needs to be performed immediately to prevent the equipment from overheating or even being damaged. Therefore, step S340 is executed: control the fan 200 to reverse to perform self-cleaning on the radiator 100.
[0047] After the self-cleaning preset time, the debris on the radiator 100 may be blown off and removed, and the workload of the engineering vehicle and the temperature of related equipment will decrease, that is, the self-cleaning operation achieves the expected effect. However, the debris on the radiator 100 may not be blown off, and the self-cleaning operation does not achieve the expected effect. Therefore, step S350 is executed: determine whether the actual heat exchange of the radiator 100 continues to decrease or whether the actual operating conditions of the fan 200 continue to increase.
[0048] If not, it means that the self-cleaning operation has achieved the expected effect, so return to step S100.
[0049] If so, it indicates that the self-cleaning operation has not achieved the expected results. In this case, step S360 is executed: the control prompter prompts the driver to stop the machine and perform manual cleaning. The prompting method can be set as needed. For example, the prompt can be displayed on the cab screen or an audible and visual alarm can be used to remind the driver to take appropriate measures to protect the relevant equipment from damage.
[0050] The cleaning method for the vehicle radiator in this project determines the timing for controlling the fan 200 to reverse and perform self-cleaning based on the relationship between the actual heat dissipation of the radiator 100 and the standard heat dissipation, as well as the trend of the actual heat dissipation, and the relationship between the actual operating conditions of the fan 200 and the standard operating conditions, as well as the trend of the actual operating conditions. This effectively avoids unnecessary self-cleaning operations performed too early or not performed in time, which could lead to overheating or even damage to the equipment, thus balancing the operational efficiency and stable operation of the engineering vehicle.
[0051] Please refer to Figure 7 This invention also provides a radiator cleaning device for engineering vehicles, which is applied within the aforementioned controller 400 to execute the aforementioned radiator cleaning method for engineering vehicles. This radiator cleaning device for engineering vehicles includes an acquisition module 500, a calculation module 600, and a control module 700.
[0052] The acquisition module 500 is used to acquire the actual inlet water temperature, actual outlet water temperature, actual water flow rate of the radiator 100, and the actual operating conditions of the fan 200. In this embodiment, the acquisition module 500 is used to execute step S100.
[0053] The calculation module 600 is used to calculate the actual heat exchange of the radiator 100 based on the actual inlet water temperature, actual outlet water temperature, and actual water flow rate. In this embodiment, the calculation module 600 is used to execute step S200.
[0054] The control module 700 is used to control the rotation direction of the fan 200 based on the actual heat exchange of the radiator 100 and the actual operating conditions of the fan 200. In this embodiment, the control module 700 is used to execute step S300.
[0055] The radiator control device for engineering vehicles can effectively prevent the radiator from performing unnecessary self-cleaning operations prematurely or failing to perform self-cleaning in a timely manner, which could lead to overheating or even damage to the equipment, thus ensuring both stable operation and work efficiency of the engineering vehicles.
[0056] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions. In addition, the functional modules in the embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.
[0057] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.
Claims
1. A method for cleaning the radiator of an engineering vehicle, characterized in that, include: Obtain the actual inlet water temperature, actual outlet water temperature, actual water flow rate, and actual operating conditions of the fan for the radiator; The actual heat exchange of the radiator is calculated based on the actual inlet water temperature, actual outlet water temperature, and actual water flow rate of the radiator. The rotation direction of the fan is controlled based on the actual heat exchange of the radiator and the actual operating conditions of the fan.
2. The method for cleaning the radiator of an engineering vehicle according to claim 1, characterized in that, The step of "controlling the rotation direction of the fan according to the actual heat exchange of the radiator and the actual operating conditions of the fan" specifically includes: Determine whether the ratio of the difference between the actual heat exchange and the standard heat exchange of the radiator to the standard heat exchange is greater than a first threshold. If so, the rotation direction of the fan is controlled according to the actual operating conditions of the fan and the changing trend of the actual heat exchange of the radiator.
3. The method for cleaning the radiator of an engineering vehicle according to claim 2, characterized in that, The step of "controlling the rotation direction of the fan according to the actual operating conditions of the fan and the changing trend of the actual heat exchange of the radiator" specifically includes: Determine whether the ratio of the difference between the actual operating condition and the standard operating condition of the fan to the standard operating condition is greater than a second threshold. If so, the rotation direction of the fan is controlled according to the changing trend of the actual heat exchange of the radiator and the changing trend of the actual operating conditions of the fan.
4. The method for cleaning the radiator of an engineering vehicle according to claim 3, characterized in that, The step of "controlling the rotation direction of the fan according to the changing trend of the actual heat exchange of the radiator and the changing trend of the actual operating conditions of the fan" specifically includes: Determine whether the actual heat exchange of the radiator decreases in a stepwise manner and whether the actual operating conditions of the fan increase in a stepwise manner; If so, control the fan to reverse in order to perform self-cleaning on the heat sink.
5. The method for cleaning the radiator of an engineering vehicle according to claim 4, characterized in that, The step of "controlling the fan to reverse in order to self-clean the heat sink" is followed by: After the self-cleaning preset time, determine whether the actual heat exchange of the radiator continues to decrease or whether the actual operating conditions of the fan continue to increase; If so, the control prompt will instruct the driver to stop the machine and perform manual cleaning.
6. The method for cleaning the radiator of an engineering vehicle according to claim 3, characterized in that, The first threshold is 5%, and the second threshold is 3%.
7. The method for cleaning the radiator of an engineering vehicle according to claim 1, characterized in that, The actual operating condition of the fan is the actual operating current or the actual airflow efficiency of the fan.
8. The method for cleaning the radiator of an engineering vehicle according to claim 1, characterized in that, The actual water flow rate of the radiator is obtained based on the correspondence between the duty cycle of the water pump connected to the radiator and the water flow rate.
9. A radiator cleaning device for engineering vehicles, characterized in that, include: The acquisition module is used to acquire the actual inlet water temperature, actual outlet water temperature, actual water flow rate, and actual operating conditions of the fan of the radiator; The calculation module is used to calculate the actual heat exchange of the radiator based on the actual inlet water temperature, actual outlet water temperature, and actual water flow rate of the radiator. The control module is used to control the rotation direction of the fan based on the actual heat exchange of the radiator and the actual operating conditions of the fan.
10. An engineering vehicle, characterized in that, Includes a controller for performing the engineering vehicle radiator cleaning method according to any one of claims 1-8.