Agricultural machine air inlet and heat dissipation system combined control method and system and agricultural machine

Abstract

The invention relates to the technical field of heat dissipation, in particular to a combined control method and system for an air inlet and heat dissipation system of an agricultural machine and the agricultural machine. The air inlet and heat dissipation system comprises a radiator, a fan, a wind scooper, a dust collection channel and an air filter, the radiator and the fan are arranged at the two ends of the wind scooper respectively, and the wind scooper is communicated with a dust discharge port of the air filter through the dust collection channel; the method comprises the following steps: acquiring an engine rotating speed, a cooling liquid temperature and an air filter resistance value of a to-be-controlled agricultural machine; based on the engine rotating speed, the cooling liquid temperature and the air filter resistance value, whether a first preset condition or a second preset condition is met is judged; when the first preset condition is met, the fan is controlled to be switched to an air blowing mode to clean the radiator, and the dust collection channel is kept closed; and when a second preset condition is met, the fan is controlled to be maintained in the air suction mode, and the dust collection channel is controlled to be opened to clean the air filter. The device can automatically judge and execute the cleaning of the radiator or the air filter, and realizes the automation of maintenance operation.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology, and in particular to a method, system, and agricultural machinery for the combined control of air intake and heat dissipation systems of agricultural machinery. Background Technology

[0002] Off-road agricultural machinery (especially tractors) operates in harsh environments with high dust levels, posing significant challenges to heat dissipation and air intake maintenance. Firstly, regarding the cooling system, dust and debris adhering to the hood and radiator accumulate over time, severely hindering heat dissipation efficiency and potentially causing excessively high engine coolant temperatures, ultimately affecting overall machine performance and reliability. Secondly, concerning the air intake system, dust buildup in the air filter increases resistance, leading to insufficient engine airflow and decreased performance.

[0003] Therefore, when dust and debris accumulate in front of the radiator or inside the air filter, operators must stop the machine for manual cleaning and maintenance. This not only significantly reduces operational efficiency but also increases maintenance costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method, system and agricultural machinery for the combined control of air intake and heat dissipation systems of agricultural machinery, so as to solve the above-mentioned technical problem.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A combined control method for an agricultural machinery air intake and heat dissipation system, the air intake and heat dissipation system including a radiator, a fan, an air guide shroud, a dust suction channel, and an air filter, wherein the radiator and the fan are respectively disposed at both ends of the air guide shroud, and the air guide shroud is connected to the dust discharge port of the air filter through the dust suction channel; the method includes: acquiring the engine speed, coolant temperature, and air filter resistance value of the agricultural machinery to be controlled; determining whether a first preset condition or a second preset condition is met based on the engine speed, coolant temperature, and air filter resistance value; when the first preset condition is met, controlling the fan to switch to a blowing mode to clean the radiator, and keeping the dust suction channel closed; when the second preset condition is met, controlling the fan to maintain in a suction mode, and controlling the dust suction channel to open to clean the air filter.

[0006] The beneficial effects of this invention are as follows: By monitoring engine speed, coolant temperature, and air filter resistance, this invention automatically determines and executes radiator cleaning or air filter cleaning, thus automating maintenance operations. The core joint control logic of this invention ensures that the air filter passage is simultaneously closed during radiator cleaning, effectively preventing secondary pollution caused by dust backflow. This significantly improves the continuity and efficiency of operations while ensuring that the engine of the controlled agricultural machinery is always in optimal working condition.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the first preset condition includes: the engine speed is less than or equal to a first preset speed and greater than a second preset speed, and the coolant temperature is greater than or equal to a first preset temperature and less than a second preset temperature.

[0009] Furthermore, the second preset condition includes: the engine speed is less than or equal to the second preset speed and greater than the third preset speed, the coolant temperature is less than the first preset temperature, and the air filter resistance value is greater than or equal to the preset resistance value.

[0010] Furthermore, the method also includes: when the engine speed, the coolant temperature, and the air filter resistance value do not meet either the first preset condition or the second preset condition, controlling the fan to maintain the suction mode and keeping the dust suction channel closed.

[0011] Furthermore, the method also includes: when receiving the start signal of the agricultural machinery to be controlled, obtaining the current coolant temperature; if the current coolant temperature is greater than or equal to the start protection threshold, controlling the fan to switch to the blowing mode to clean the radiator, and keeping the dust suction channel closed.

[0012] Furthermore, the activation protection threshold is 60°C.

[0013] To address the aforementioned technical problems, this invention also provides a combined control system for the air intake and cooling system of agricultural machinery, comprising: a crankshaft speed sensor, a coolant temperature sensor, a resistance alarm sensor, a first solenoid valve, a drive device, a second solenoid valve, and a processor; the crankshaft speed sensor is used to detect the engine speed of the agricultural machinery under control and transmit the engine speed to the electronic control unit of the agricultural machinery under control; the coolant temperature sensor is used to detect the coolant temperature of the agricultural machinery under control and transmit the coolant temperature to the electronic control unit of the agricultural machinery under control; the resistance alarm sensor is used to detect the air filter resistance value of the agricultural machinery under control; the first solenoid valve is connected to the dust suction channel; the drive device is used to drive the fan to execute the blowing mode; the second solenoid valve is connected to the power source pipeline of the drive device; the processor is electrically connected to the electronic control unit of the agricultural machinery under control, the resistance alarm sensor, the first solenoid valve, and the second solenoid valve respectively, and the processor is used to execute the combined control method for the air intake and cooling system of agricultural machinery as described above.

[0014] Furthermore, the air filter includes a main air filter and a pre-filter, the dust collection channel includes a main air filter channel and a pre-filter channel, the first solenoid valve includes a main air filter solenoid valve and a pre-filter solenoid valve, the main air filter is connected to the main air filter channel, the pre-filter is connected to the pre-filter channel, the main air filter solenoid valve is connected to the main air filter channel, and the pre-filter solenoid valve is connected to the pre-filter channel.

[0015] Furthermore, the driving device is a hydraulic pump or an air pump.

[0016] To solve the above-mentioned technical problems, the present invention also provides an agricultural machine, including the combined control system of the agricultural machine air intake and heat dissipation system as described above. Attached Figure Description

[0017] Figure 1 This is a flowchart of the combined control method for the air intake and heat dissipation system of agricultural machinery according to the present invention; Figure 2 This is a schematic diagram of the installation of the combined control system for the air intake and heat dissipation system of agricultural machinery according to Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of the signal transmission of the combined control system for the air intake and heat dissipation system of agricultural machinery according to Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the installation of the combined control system for the air intake and heat dissipation system of agricultural machinery according to Embodiment 3 of the present invention; Figure 5 This is a schematic diagram of the signal transmission of the combined control system for the air intake and heat dissipation system of agricultural machinery in Embodiment 3 of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Engine; 2. First solenoid valve; 3. Air filter; 4. Fan; 5. Dust suction channel; 6. Second solenoid valve; 7. Drive unit; 8. Main air filter; 9. Main air filter channel; 10. Main air filter solenoid valve; 11. Pre-filter; 12. Pre-filter channel; 13. Pre-filter solenoid valve. Detailed Implementation

[0019] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0020] Example 1 like Figure 1 As shown, this embodiment provides a combined control method for an agricultural machinery air intake and heat dissipation system. The air intake and heat dissipation system includes a radiator, a fan 4, an air guide shroud, a dust suction channel 5, and an air filter 3. The radiator and fan 4 are respectively located at both ends of the air guide shroud, and the air guide shroud is connected to the dust discharge port of the air filter 3 through the dust suction channel 5. The method includes: S101. Obtain the engine speed, coolant temperature, and air filter resistance value of the agricultural machinery to be controlled; S102. Based on engine speed, coolant temperature and air filter resistance value, determine whether the first preset condition or the second preset condition is met. S103. When the first preset condition is met, control the fan 4 to switch to the blowing mode to clean the heat sink, and keep the dust suction channel 5 closed; when the second preset condition is met, control the fan 4 to stay in the suction mode, and control the dust suction channel 5 to open to clean the air filter 3.

[0021] The intake and cooling system includes a conventional intake system and a cooling system. The radiator, fan 4, and air duct are components of a conventional cooling system, while the air filter 3 is a component of a conventional intake system, used to provide filtered air to the engine 1. The dust extraction channel 5 connects the air filter 3 and the air duct, thus connecting the intake system and the cooling system.

[0022] Coolant temperature refers to the temperature of the coolant flowing in the engine's cooling circulation system. Air filter resistance refers to the pressure drop or pressure loss that occurs when air passes through the air filter element.

[0023] Engine speed refers to the number of rotations of the crankshaft of engine 1 per unit time. Based on the engine speed, the operating state of engine 1 can be determined. In this embodiment, when the engine speed is less than or equal to a fourth preset speed, the operating state of engine 1 is determined to be a shut-off state; when the engine speed is greater than the fourth preset speed, the operating state of engine 1 is determined to be a running state. More specifically, when the engine speed is greater than the fourth preset speed and less than or equal to a third preset speed, the operating state of engine 1 is determined to be a low-speed running state; when the engine speed is greater than the third preset speed and less than or equal to a second preset speed, the operating state of engine 1 is determined to be a medium-speed running state; and when the engine speed is greater than the second preset speed and less than or equal to a first preset speed, the operating state of engine 1 is determined to be a high-speed running state.

[0024] The first preset speed is the highest speed that engine 1 can reach, which depends on the characteristics of engine 1 itself. The second, third, and fourth preset speeds can be set according to actual usage conditions. In this embodiment, the second preset speed is set to 1700 rpm, the third preset speed is set to 1200 rpm, and the fourth preset speed is set to 600 rpm.

[0025] The operating states of engine 1 are divided into four types: engine off state (engine speed n < 600 rpm), low speed operation state (1200 rpm ≥ n > 600 rpm), medium speed operation state (1700 rpm ≥ n > 1200 rpm), and high speed operation state (maximum speed ≥ n > 1700 rpm).

[0026] The suction mode is the standard operating mode (normal cooling mode). In suction mode, fan 4 draws in cool outside air and cools it by flowing over the surface of the heatsink. While drawing in air, it also attracts dust and debris from the environment and traps them on the outer surface of the heatsink.

[0027] In this method, it is determined whether the engine speed, coolant temperature and air filter resistance value meet the first preset condition, and then it is determined whether the radiator needs to be cleaned.

[0028] Optionally, in an embodiment, the first preset condition includes: the engine speed is less than or equal to a first preset speed and greater than a second preset speed, and the coolant temperature is greater than or equal to a first preset temperature and less than a second preset temperature.

[0029] The second preset temperature is the maximum temperature allowed by engine 1, while the first preset temperature can be set according to actual usage conditions.

[0030] Specifically, when the first preset condition is met, control fan 4 to switch to blowing mode to clean the heatsink, and keep the dust suction channel 5 closed.

[0031] In blower mode, fan 4 reverses direction, changing the airflow direction to the opposite of suction mode. Fan 4 blows air towards the heatsink, dislodging accumulated dust and debris and cleaning the heatsink. Each time the system switches to blower mode, it remains in blower mode for a preset duration (e.g., 30 seconds) before switching back to suction mode.

[0032] When fan 4 is in blowing mode, if the suction duct 5 is open, dust will be blown into the air filter 3 through the suction duct 5, affecting the resistance of the air filter 3. Therefore, when fan 4 is in blowing mode, the suction duct 5 must be kept closed.

[0033] In this method, it is determined whether the engine speed, coolant temperature and air filter resistance value meet the second preset condition, and then it is determined whether the air filter 3 needs to be cleaned.

[0034] Optionally, in an embodiment, the second preset condition includes: the engine speed is less than or equal to the second preset speed and greater than the third preset speed, the coolant temperature is less than the first preset temperature, and the air filter resistance value is greater than or equal to the preset resistance value.

[0035] In this embodiment, the preset resistance value is set to 4.5 kPa, which can be adjusted according to actual usage requirements.

[0036] When the engine speed is less than or equal to the second preset speed and greater than the third preset speed, the suction speed of the fan 4 within this speed range can meet the suction requirements when the dust collection channel 5 is opened, and at the same time, it does not affect the air intake requirements of the air filter 3.

[0037] After the dust suction channel 5 is opened, the rotation of the fan 4 creates an airflow inside the air guide shroud to cool the heat dissipation system. The rotation of the fan 4 in suction mode can generate a large negative pressure, which generates a large suction force on the dust suction channel 5, and can suck out the dust from the dust outlet of the air filter 3, thereby automatically cleaning the air filter 3, reducing downtime for maintenance during operation and improving work efficiency.

[0038] Optionally, in an embodiment, the method further includes: when the engine speed, coolant temperature, and air filter resistance value do not meet either the first preset condition or the second preset condition, controlling the fan 4 to maintain the suction mode and keeping the dust suction channel 5 closed.

[0039] Specifically, when engine 1 is off, the power source driving fan 4 in blowing mode is disconnected, and the dust suction passage 5 remains closed. When the coolant temperature of engine 1 is lower than a first preset temperature and the air filter resistance is lower than a preset resistance value, the power source driving fan 4 in blowing mode is disconnected, and the dust suction passage 5 remains closed.

[0040] Optionally, in the embodiment, the method further includes: when receiving the start signal of the agricultural machinery to be controlled, obtaining the current coolant temperature; if the current coolant temperature is greater than or equal to the start protection threshold, controlling the fan 4 to switch to the blowing mode to clean the radiator, and keeping the dust suction channel 5 closed.

[0041] Optionally, in this embodiment, the activation protection threshold is 60°C.

[0042] The start signal for the entire machine can be obtained based on the action of the ignition valve of the agricultural machinery under control. After the agricultural machinery under control starts, the current coolant temperature is detected. If the current coolant temperature reaches 60℃, the fan 4 is controlled to switch to the blowing mode to clean the radiator, and the dust suction channel 5 is kept closed.

[0043] The preset speed, preset resistance value, and preset temperature set in this method are only examples. For different machine models, the settings should be determined according to the actual usage conditions. In summary, this method automatically determines and executes radiator cleaning or air filter 3 cleaning by monitoring engine speed, coolant temperature, and air filter resistance, thus automating maintenance operations. The core joint control logic of this method ensures that the air filter 3 channel is simultaneously closed during radiator cleaning, effectively preventing secondary pollution caused by dust backflow. This significantly improves operational continuity and efficiency while ensuring that the engine 1 of the controlled agricultural machinery is always in optimal working condition.

[0044] Example 2 like Figure 2 and Figure 3 As shown, this embodiment provides a combined control system for the air intake and cooling system of agricultural machinery, including: a crankshaft speed sensor, a coolant temperature sensor, a resistance alarm sensor, a first solenoid valve 2, a drive unit 7, a second solenoid valve 6, and a processor; the crankshaft speed sensor is used to detect the engine speed of the agricultural machinery under control and transmit the engine speed to the electronic control unit of the agricultural machinery under control; the coolant temperature sensor is used to detect the coolant temperature of the agricultural machinery under control and transmit the coolant temperature to the electronic control unit of the agricultural machinery under control; the resistance alarm sensor is used to detect the air filter resistance value of the agricultural machinery under control; the first solenoid valve 2 is connected to the dust suction channel 5; the drive unit 7 is used to drive the fan 4 to perform the blowing mode; the second solenoid valve 6 is connected to the power source pipeline of the drive unit 7; the processor is electrically connected to the electronic control unit, the resistance alarm sensor, the first solenoid valve 2, and the second solenoid valve 6 of the agricultural machinery under control, and the processor is used to execute the combined control method for the air intake and cooling system of agricultural machinery as described in Embodiment 1.

[0045] For the suction mode of fan 4, the most traditional and standard method in agricultural machinery is as follows: the crankshaft of engine 1 directly drives the shaft of fan 4 through a belt and pulley system (or gears). As long as engine 1 is running, it will continuously drive fan 4 to rotate in a fixed direction (i.e., forward rotation) through this mechanical connection, thereby generating airflow (suction) from outside the machine towards the radiator, providing continuous basic cooling for engine 1.

[0046] In this system, a drive unit 7 is configured to drive the fan 4 in blowing mode. Optionally, in this embodiment, the drive unit 7 is a hydraulic pump or an air pump. Specifically, after the second solenoid valve 6 is opened, the drive unit 7 outputs a rotational force opposite to the normal driving direction of the engine 1. This strong reverse torque overcomes the forward driving torque transmitted by the engine 1 through the belt, forcing the fan blades of the fan 4 to rotate in the opposite direction, thereby achieving the blowing mode. When the second solenoid valve 6 is closed, the drive unit 7 stops driving the fan 4. At this time, the fan 4 rotates forward under the action of the engine 1, that is, it executes the suction mode.

[0047] The first solenoid valve 2 is a normally closed solenoid valve. When it receives a command from the processor to open the dust extraction channel 5, the first solenoid valve 2 opens.

[0048] The second solenoid valve 6 is a normally closed solenoid valve. When it receives a command from the processor to control the fan 4 to switch to the blowing mode, the second solenoid valve 6 opens.

[0049] The crankshaft speed sensor is the signal source for measuring engine speed. The coolant temperature sensor is used to detect the coolant temperature of engine 1, preventing the coolant temperature from exceeding the allowable temperature of engine 1, thus protecting engine 1. The resistance alarm sensor is used to detect the resistance of air filter 3.

[0050] The Electronic Control Unit (ECU) is used to collect signals and control instructions from the engine. The processor, the main processing unit, reads the signals from the sensors collected by the ECU for subsequent analysis and control of the solenoid valves. The processor analyzes and verifies the collected engine speed, coolant temperature, and air filter resistance values, and controls the operating status of each solenoid valve.

[0051] Example 3 Based on Example 2, such as Figure 4 and Figure 5 As shown, the air filter 3 includes a main air filter 8 and a pre-filter 11, the dust collection channel 5 includes a main air filter channel 9 and a pre-filter channel 12, and the first solenoid valve 2 includes a main air filter solenoid valve 10 and a pre-filter solenoid valve 13. The main air filter 8 is connected to the main air filter channel 9, the pre-filter 11 is connected to the pre-filter channel 12, the main air filter solenoid valve 10 is connected to the main air filter channel 9, and the pre-filter solenoid valve 13 is connected to the pre-filter channel 12.

[0052] Both the main air filter solenoid valve 10 and the pre-filter solenoid valve 13 are normally closed solenoid valves. When a command is received from the processor to open the dust extraction channel 5, the main air filter solenoid valve 10 and the pre-filter solenoid valve 13 open, thereby cleaning the main air filter 8 and the pre-filter 11.

[0053] Example 4 This embodiment provides an agricultural machine, including a combined control system for the agricultural machine's air intake and heat dissipation system as described in Embodiment 2 or Embodiment 3.

[0054] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

[0055] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and represent a limitation on a specific order or sequence. Where appropriate, the order of use for similar objects can be interchanged so that the embodiments of this application described herein can be implemented in an order other than that shown or described.

[0056] Those skilled in the art will recognize that this invention can be implemented as a system, method, or computer program product. Therefore, this invention can be specifically implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this invention can also be implemented as a computer program product contained in one or more computer-readable media, which includes computer-readable program code.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for combined control of air intake and heat dissipation systems in agricultural machinery, characterized in that, The air intake and heat dissipation system includes a radiator, a fan, an air guide shroud, a dust suction channel, and an air filter. The radiator and the fan are respectively located at both ends of the air guide shroud, and the air guide shroud is connected to the dust discharge port of the air filter through the dust suction channel. The method includes: Obtain the engine speed, coolant temperature, and air filter resistance of the agricultural machinery to be controlled; Based on the engine speed, the coolant temperature and the air filter resistance value, determine whether the first preset condition or the second preset condition is met; When the first preset condition is met, the fan is controlled to switch to blowing mode to clean the heat sink, and the dust suction channel is kept closed; When the second preset condition is met, the fan is controlled to remain in suction mode, and the dust suction channel is controlled to open to clean the air filter.

2. The combined control method for the air intake and heat dissipation system of agricultural machinery according to claim 1, characterized in that, The first preset conditions include: The engine speed is less than or equal to a first preset speed and greater than a second preset speed, and the coolant temperature is greater than or equal to a first preset temperature and less than a second preset temperature.

3. The combined control method for the air intake and heat dissipation system of agricultural machinery according to claim 2, characterized in that, The second preset condition includes: The engine speed is less than or equal to the second preset speed and greater than the third preset speed, the coolant temperature is less than the first preset temperature, and the air filter resistance value is greater than or equal to the preset resistance value.

4. The combined control method for the air intake and heat dissipation system of agricultural machinery according to claim 1, characterized in that, Also includes: When the engine speed, the coolant temperature, and the air filter resistance value do not meet either the first preset condition or the second preset condition, the fan is controlled to maintain the suction mode and the dust suction channel is kept closed.

5. The combined control method for the air intake and heat dissipation system of agricultural machinery according to claim 1, characterized in that, Also includes: Upon receiving the start signal of the agricultural machinery to be controlled, the current coolant temperature is obtained; If the current coolant temperature is greater than or equal to the activation protection threshold, the fan is controlled to switch to blowing mode to clean the radiator, and the dust suction channel is kept closed.

6. The combined control method for the air intake and heat dissipation system of agricultural machinery according to claim 5, characterized in that, The activation protection threshold is 60°C.

7. A combined control system for the air intake and heat dissipation system of agricultural machinery, characterized in that, include: Crankshaft speed sensor, coolant temperature sensor, resistance alarm sensor, first solenoid valve, drive unit, second solenoid valve and processor; The crankshaft speed sensor is used to detect the engine speed of the agricultural machinery under control and transmit the engine speed to the electronic control unit of the agricultural machinery under control. The coolant temperature sensor is used to detect the coolant temperature of the agricultural machinery under control and transmit the coolant temperature to the electronic control unit of the agricultural machinery under control. The resistance alarm sensor is used to detect the air filter resistance value of the agricultural machinery under control. The first solenoid valve is connected to the suction channel; The driving device is used to provide drive for the fan to perform a blowing mode; The second solenoid valve is connected to the power source pipeline of the drive device; The processor is electrically connected to the electronic control unit of the agricultural machinery to be controlled, the resistance alarm sensor, the first solenoid valve and the second solenoid valve, respectively. The processor is used to execute the combined control method of the agricultural machinery air intake and heat dissipation system as described in any one of claims 1 to 6.

8. The combined control system for the air intake and heat dissipation system of agricultural machinery according to claim 7, characterized in that, The air filter includes a main air filter and a pre-filter, the dust collection channel includes a main air filter channel and a pre-filter channel, the first solenoid valve includes a main air filter solenoid valve and a pre-filter solenoid valve, the main air filter is connected to the main air filter channel, the pre-filter is connected to the pre-filter channel, the main air filter solenoid valve is connected to the main air filter channel, and the pre-filter solenoid valve is connected to the pre-filter channel.

9. The combined control system for the air intake and heat dissipation system of agricultural machinery according to claim 7, characterized in that, The driving device is a hydraulic pump or an air pump.

10. An agricultural machine, characterized in that, Including the combined control system for the air intake and heat dissipation system of agricultural machinery as described in any one of claims 7 to 9.

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