Joint control method and system for air intake and heat dissipation system of agricultural machinery and agricultural machinery

Abstract

The present application relates to heat dissipation technical field, especially to a kind of agricultural machinery air intake and heat dissipation system combined control method, system and agricultural machinery.Air intake and heat dissipation system include radiator, fan, wind scooper, dust suction channel and air filter, radiator and fan are respectively arranged at the two ends of wind scooper, wind scooper is communicated with the dust discharging port of air filter by dust suction channel;Method includes: obtaining the engine speed, cooling liquid temperature and air filter resistance value of the agricultural machinery to be controlled;Based on engine speed, cooling liquid temperature and air filter resistance value, judge whether to satisfy first preset condition or second preset condition;When satisfying first preset condition, control fan to switch to blowing mode to clean radiator, and keep dust suction channel closed;When satisfying second preset condition, control fan to maintain in suction mode, and control dust suction channel to open to clean air filter.The present application can automatically judge and execute the cleaning of radiator or air filter, and realizes the automation of maintenance operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat dissipation technology, and particularly relates to a combined control method and system for an air intake and heat dissipation system of an agricultural machine and the agricultural machine. BACKGROUND

[0002] Non-road agricultural machines (especially tractors) face severe challenges in heat dissipation and air intake maintenance due to their harsh operating environment and large amount of dust. First, in terms of heat dissipation, dust and debris attached to the hood and the front of the radiator will accumulate over time, severely hindering the heat dissipation efficiency, easily causing the engine coolant temperature to be too high, and ultimately affecting the performance and reliability of the entire machine. Second, in terms of the air intake system, the air filter is prone to resistance rise due to dust accumulation, resulting in insufficient engine air intake and performance decline.

[0003] Therefore, when there is a large amount of dust and debris attached to the front of the radiator or accumulated in the air filter, manual cleaning and maintenance by the operator are required. This not only significantly reduces the operating efficiency, but also increases the maintenance cost. SUMMARY

[0004] The present application solves the technical problem of providing a combined control method and system for an air intake and heat dissipation system of an agricultural machine and the agricultural machine.

[0005] The technical solution of the present application to solve the above technical problem is as follows: a combined control method for an air intake and heat dissipation system of an agricultural machine, the air intake and heat dissipation system comprising a radiator, a fan, a wind deflector, a dust suction channel, and an air filter, the radiator and the fan being respectively arranged at two ends of the wind deflector, and the wind deflector being in communication with a dust discharge port of the air filter through the dust suction channel; the method comprising: obtaining an engine speed, a coolant temperature, and an air filter resistance value of the agricultural machine to be controlled; judging whether a first preset condition or a second preset condition is met based on the engine speed, the coolant temperature, and the 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; and 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 present application has the beneficial effect of automatically judging and executing cleaning of the radiator or the air filter by monitoring the engine speed, the coolant temperature, and the air filter resistance, thereby realizing automation of maintenance operations. The core combined control logic of the present application ensures that the air filter channel is closed simultaneously when the radiator is cleaned, effectively avoiding secondary pollution caused by dust backflow, thereby significantly improving the continuity and efficiency of operation while ensuring that the engine of the agricultural machine to be controlled is always in the best working condition.

[0007] On the basis of the above technical solutions, the application can be further improved as follows.

[0008] Further, the first preset condition comprises: 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] Further, the second preset condition comprises: the engine speed is less than or equal to the second preset speed and greater than a 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 a preset resistance value.

[0010] Further, the method further comprises: when the engine speed, the coolant temperature and the air filter resistance value neither satisfy the first preset condition nor satisfy the second preset condition, controlling the fan to maintain the air suction mode and keeping the dust suction channel closed.

[0011] Further, the method further comprises: when receiving a whole machine starting signal of the controlled agricultural machine, acquiring a current coolant temperature; if the current coolant temperature is greater than or equal to a starting protection threshold, controlling the fan to switch to the air blowing mode to clean the radiator and keeping the dust suction channel closed.

[0012] Further, the starting protection threshold is 60℃.

[0013] To solve the above technical problems, the application further provides an agricultural machinery air intake and heat dissipation system combined control system, comprising: a crankshaft speed sensor, a coolant temperature sensor, a resistance alarm sensor, a first electromagnetic valve, a driving device, a second electromagnetic valve and a processor; the crankshaft speed sensor is used to detect the engine speed of the controlled agricultural machine and transmit the engine speed to the electronic control unit of the controlled agricultural machine; the coolant temperature sensor is used to detect the coolant temperature of the controlled agricultural machine and transmit the coolant temperature to the electronic control unit of the controlled agricultural machine; the resistance alarm sensor is used to detect the air filter resistance value of the controlled agricultural machine; the first electromagnetic valve is connected to the dust suction channel; the driving device is used to provide driving for the fan to execute the air blowing mode; the second electromagnetic valve is connected to the power source pipeline of the driving device; the processor is electrically connected with the electronic control unit of the controlled agricultural machine, the resistance alarm sensor, the first electromagnetic valve and the second electromagnetic valve, and is used to execute the agricultural machinery air intake and heat dissipation system combined control method as described above.

[0014] Further, the air filter comprises a main air filter and a pre-filter, the dust suction channel comprises a main air filter channel and a pre-filter channel, the first electromagnetic valve comprises a main air filter electromagnetic valve and a pre-filter electromagnetic valve, the main air filter is connected with the main air filter channel, the pre-filter is connected with the pre-filter channel, the main air filter electromagnetic valve is connected on the main air filter channel, and the pre-filter electromagnetic valve is connected on the pre-filter channel.

[0015] Further, the driving device is a hydraulic pump or a gas pump.

[0016] To solve the above technical problems, the application further provides an agricultural machine comprising the agricultural machine air intake and heat dissipation system combined control system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A flow chart of the agricultural machine air intake and heat dissipation system combined control method of the application;

[0018] Figure 2 An installation schematic diagram of the agricultural machine air intake and heat dissipation system combined control system of the second embodiment of the application;

[0019] Figure 3 A signal transmission schematic diagram of the agricultural machine air intake and heat dissipation system combined control system of the second embodiment of the application;

[0020] Figure 4 An installation schematic diagram of the agricultural machine air intake and heat dissipation system combined control system of the third embodiment of the application;

[0021] Figure 5 A signal transmission schematic diagram of the agricultural machine air intake and heat dissipation system combined control system of the third embodiment of the application.

[0022] In the drawings, the components represented by the numbers are listed as follows:

[0023] 1, engine; 2, first electromagnetic valve; 3, air filter; 4, fan; 5, dust suction channel; 6, second electromagnetic valve; 7, driving device; 8, main air filter; 9, main air filter channel; 10, main air filter electromagnetic valve; 11, pre-filter; 12, pre-filter channel; 13, pre-filter electromagnetic valve. DETAILED DESCRIPTION

[0024] The principles and features of the application are described below, and the examples are only used to explain the application and not to limit the scope of the application.

[0025] Embodiment one

[0026] As Figure 1As shown, the embodiment provides a kind of agricultural machinery air intake and heat dissipation system combined control method, air intake and heat dissipation system includes radiator, fan 4, wind scooper, dust suction channel 5 and air filter 3, radiator and fan 4 are respectively arranged at the two ends of wind scooper, wind scooper is communicated with the dust discharge port of air filter 3 by dust suction channel 5;Method includes:

[0027] S101, the engine speed of the agricultural machinery to be controlled, cooling liquid temperature and air filter resistance value are acquired;

[0028] S102, based on engine speed, cooling liquid temperature and air filter resistance value, whether to meet first preset condition or second preset condition is judged;

[0029] S103, when meeting first preset condition, fan 4 is switched to blowing mode to clean radiator, and keep dust suction channel 5 closed;When meeting second preset condition, fan 4 is maintained in suction mode, and dust suction channel 5 is controlled to open to clean air filter 3.

[0030] Air intake and heat dissipation system includes conventional air intake system and heat dissipation system.Radiator, fan 4 and wind scooper are the structure in conventional heat dissipation system, air filter 3 is the structure in conventional air intake system, and air filter 3 is used to provide filtered air for engine 1.Dust suction channel 5 connects air filter 3 and wind scooper together, that is, the connection of air intake system and heat dissipation system is realized.

[0031] Cooling liquid temperature refers to the temperature of cooling liquid flowing in engine 1 cooling circulation system.Air filter resistance value refers to the pressure drop or pressure loss generated when air passes through air filter 3 filter core.

[0032] Engine speed refers to the number of rotations of engine 1 crankshaft per unit time.According to engine speed, the running state of engine 1 can be determined.In the embodiment, when engine speed is less than or equal to fourth preset speed, the running state of engine 1 is determined as off state;When engine speed is greater than fourth preset speed, the running state of engine 1 is determined as running state.More specifically, when engine speed is greater than fourth preset speed and less than or equal to third preset speed, the running state of engine 1 is determined as low-speed running state;When engine speed is greater than third preset speed and less than or equal to second preset speed, the running state of engine 1 is determined as medium-speed running state;When engine speed is greater than second preset speed and less than or equal to first preset speed, the running state of engine 1 is determined as high-speed running state.

[0033] The first preset rotating speed is the highest rotating speed that the engine 1 can reach, which depends on the characteristics of the engine 1 itself. The second, third and fourth preset rotating speeds can be set according to actual use. In the embodiment, the second preset rotating speed is set to 1700 rpm, the third preset rotating speed is set to 1200 rpm, and the fourth preset rotating speed is set to 600 rpm.

[0034] That is, the operating state of the engine 1 is divided into four states in total: the off state (engine rotating speed n < 600 rpm), the low-speed operating state (1200 rpm ≥ n > 600 rpm), the medium-speed operating state (1700 rpm ≥ n > 1200 rpm), and the high-speed operating state (the highest rotating speed ≥ n > 1700 rpm).

[0035] The air suction mode is a standard working mode (normal cooling mode), in which the fan 4 sucks in external cold air and flows through the surface of the radiator to cool it. At the same time of sucking in the air, dust and sundries in the environment are also adsorbed on the outer surface of the radiator.

[0036] In the method, it is determined whether the engine rotating speed, the coolant temperature and the air filter resistance value meet the first preset condition, and then it is determined whether the radiator needs to be cleaned.

[0037] Optionally, in the embodiment, the first preset condition comprises that the engine rotating speed is less than or equal to the first preset rotating speed and greater than the second preset rotating speed, and the coolant temperature is greater than or equal to the first preset temperature and less than the second preset temperature.

[0038] The second preset temperature is the maximum temperature allowed by the engine 1, and the first preset temperature can be set according to actual use.

[0039] Specifically, when the first preset condition is met, the fan 4 is switched to the blowing mode to clean the radiator, and the dust suction channel 5 is kept closed.

[0040] In the blowing mode, the fan 4 is reversed, so that the air direction is opposite to that in the air suction mode, that is, the fan 4 blows air to the radiator, so that the dust and sundries accumulated on the radiator are blown off, realizing cleaning of the radiator. After each switching to the blowing mode, the blowing mode is switched back to the air suction mode after a preset time (for example, 30 seconds).

[0041] In the blowing mode of the fan 4, if the dust suction channel 5 is opened, the dust will be blown into the air filter 3 through the dust suction channel 5, affecting the resistance of the air filter 3. Therefore, in the blowing mode of the fan 4, the dust suction channel 5 needs to be kept in a closed state.

[0042] In the method, whether the engine speed, the coolant temperature and the air filter resistance value meet the second preset condition is determined, and then whether the air filter 3 needs to be cleaned is determined.

[0043] Optionally, in the embodiment, the second preset condition comprises: 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.

[0044] In the embodiment, the preset resistance value is set to 4.5kPa, which can be adjusted according to actual use requirements.

[0045] When the engine speed is less than or equal to the second preset speed and greater than the third preset speed, the air speed of the fan 4 in this speed range can meet the suction requirement when the dust suction channel 5 is opened, and at the same time, the air intake requirement of the air filter 3 is not affected.

[0046] After the dust suction channel 5 is opened, the rotation of the fan 4 forms a wind field in the air guide cover to cool the heat dissipation system. The rotation of the fan 4 in the air suction state can generate a large negative pressure, which generates a large suction force on the dust suction channel 5, so that the dust in the dust discharge port of the air filter 3 can be sucked out, thereby automatically cleaning the air filter 3, reducing the downtime maintenance time during operation, and improving the work efficiency.

[0047] Optionally, in the embodiment, the method further comprises: when the engine speed, the coolant temperature and the air filter resistance value neither meet the first preset condition nor meet the second preset condition, controlling the fan 4 to maintain the air suction mode and keeping the dust suction channel 5 closed.

[0048] Specifically, in the engine 1 off state, the power source for driving the fan 4 to execute the air blowing mode is disconnected, and the dust suction channel 5 is kept closed. When the coolant temperature of the engine 1 is less than the first preset temperature and the air filter resistance value is less than the preset resistance value, the power source for driving the fan 4 to execute the air blowing mode is disconnected, and the dust suction channel 5 is kept closed.

[0049] Optionally, in the embodiment, the method further comprises: when receiving the whole machine starting signal of the controlled agricultural machinery, acquiring the current coolant temperature; if the current coolant temperature is greater than or equal to the starting protection threshold value, controlling the fan 4 to switch to the air blowing mode to clean the radiator, and keeping the dust suction channel 5 closed.

[0050] Optionally, in the embodiment, the starting protection threshold value is 60℃.

[0051] The whole machine starting signal can be obtained according to the action of the ignition valve of the controlled agricultural machine. After the controlled agricultural machine is started, the current cooling liquid temperature is detected. If the current cooling liquid temperature reaches 60 DEG C, the fan 4 is switched to the blowing mode to clean the radiator, and the dust suction channel 5 is kept closed.

[0052] The various preset rotating speeds, preset resistance values and preset temperatures provided in the method are only cases, and can be determined according to actual use for different models,

[0053] In summary, the method automatically judges and executes cleaning of the radiator or the air filter 3 by monitoring the engine rotating speed, the cooling liquid temperature and the air filter resistance value, and realizes automatic maintenance operation. The core joint control logic of the method ensures that the air filter 3 channel is closed at the same time when the radiator is cleaned, effectively avoiding secondary pollution caused by dust backflow, so as to significantly improve the operation continuity and efficiency while ensuring that the engine 1 of the controlled agricultural machine is always in the best working condition.

[0054] Embodiment two

[0055] As shown in Figure 2 and Figure 3 , the embodiment provides a kind of agricultural machinery air intake and radiator system joint control system, including: crankshaft rotating speed sensor, cooling liquid temperature sensor, resistance alarm sensor, first electromagnetic valve 2, driving device 7, second electromagnetic valve 6 and processor;Crankshaft rotating speed sensor is used to detect the engine rotating speed of controlled agricultural machine, and the engine rotating speed is transmitted to the electronic control unit of controlled agricultural machine;Cooling liquid temperature sensor is used to detect the cooling liquid temperature of controlled agricultural machine, and the cooling liquid temperature is transmitted to the electronic control unit of controlled agricultural machine;Resistance alarm sensor is used to detect the air filter resistance value of controlled agricultural machine;First electromagnetic valve 2 is connected on dust suction channel 5;Driving device 7 is used to provide drive for fan 4 to execute blowing mode;Second electromagnetic valve 6 is connected on the power source line of driving device 7;Processor is electrically connected with the electronic control unit of controlled agricultural machine, resistance alarm sensor, first electromagnetic valve 2 and second electromagnetic valve 6 respectively, and processor is used to execute the agricultural machinery air intake and radiator system joint control method as in embodiment one.

[0056] For the air suction mode of fan 4, the most traditional and standard way of agricultural machine is that the crankshaft of engine 1 directly drives the shaft of fan 4 through belt and pulley system (or gear). As long as engine 1 is running, fan 4 will be continuously driven to rotate in a fixed direction (i.e. forward rotation) through this mechanical connection, thereby generating air flow (air suction) from outside the machine to the radiator, providing continuous basic cooling for engine 1.

[0057] In the system, the driving device 7 is arranged to drive the fan 4 to execute the blowing mode. In the embodiment, the driving device 7 is a hydraulic pump or an air pump. Specifically, after the second electromagnetic valve 6 is opened, the driving device 7 outputs a rotating force in the opposite direction of the normal driving direction of the engine 1. The strong reverse torque can overcome the positive driving torque of the engine 1 transmitted through the belt, so as to force the fan blades of the fan 4 to rotate reversely, thereby realizing the blowing mode. When the second electromagnetic valve 6 is closed, the driving device 7 stops driving the fan 4. At this time, the fan 4 rotates in the positive direction under the action of the engine 1, i.e., executes the air suction mode.

[0058] The first electromagnetic valve 2 is a normally closed electromagnetic valve. When receiving the instruction of the processor for controlling the air suction passage 5 to be opened, the first electromagnetic valve 2 is opened.

[0059] The second electromagnetic valve 6 is a normally closed electromagnetic valve. When receiving the instruction of the processor for controlling the fan 4 to be switched to the blowing mode, the second electromagnetic valve 6 is opened.

[0060] The crankshaft rotating speed sensor is a signal source for measuring the rotating speed of the engine. The cooling liquid temperature sensor is used for detecting the temperature of the cooling liquid of the engine 1, so as to avoid the temperature of the cooling liquid of the engine 1 exceeding the allowable temperature of the engine 1, thereby protecting the engine 1. The resistance alarm sensor is used for detecting the resistance of the air filter 3.

[0061] The electronic control unit ECU is used for collecting the signals of the engine 1 and the control processing instructions. The processor is a whole machine processing unit, which can read the signals of the sensors collected by the ECU, and is used for subsequent analysis and control of the operation of the electromagnetic valves. The processor is used for analyzing and confirming the collected engine rotating speed, cooling liquid temperature and air filter resistance value, and controlling the operation state of each electromagnetic valve.

[0062] Example Three

[0063] On the basis of the example two, as shown in Figure 4 and Figure 5 , the air filter 3 comprises a main air filter 8 and a pre-filter 11, the air suction passage 5 comprises a main air filter passage 9 and a pre-filter passage 12, the first electromagnetic valve 2 comprises a main air filter electromagnetic valve 10 and a pre-filter electromagnetic valve 13, the main air filter 8 is connected with the main air filter passage 9, the pre-filter 11 is connected with the pre-filter passage 12, the main air filter electromagnetic valve 10 is connected on the main air filter passage 9, and the pre-filter electromagnetic valve 13 is connected on the pre-filter passage 12.

[0064] The main air filter electromagnetic valve 10 and the pre-filter electromagnetic valve 13 are both normally closed electromagnetic valves. When receiving the instruction of the processor for controlling the air suction passage 5 to be opened, the main air filter electromagnetic valve 10 and the pre-filter electromagnetic valve 13 are opened, so as to realize the cleaning of the main air filter 8 and the pre-filter 11.

[0065] Example Four

[0066] The embodiment provides an agricultural machine, which comprises the agricultural machine air intake and heat dissipation system combined control system according to the second or third embodiment.

[0067] The above description is merely that of the preferred embodiments of the present application and of the principles thereof. It is to be understood that the disclosed scope of the present application is not limited to the specific combinations of technical features described above, but also covers other technical solutions formed by any combinations of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above technical features can be replaced with technical features having similar functions disclosed in the present application (but not limited to) to form technical solutions.

[0068] It should be noted that the terms "first", "second" and the like in the description and claims of the application are used for distinguishing between similar objects and are not necessarily used to describe a sequential or chronological order. The terms are used interchangeably and are not necessarily limited to the context of the examples described herein.

[0069] Those skilled in the art know that the present application can be implemented as a system, a method or a computer program product, so the present application can be specifically implemented as follows: it can be a complete hardware, a complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, which is generally referred to as "circuit", "module" or "system" in this paper. In addition, in some embodiments, the present application can also be implemented as a computer program product in one or more computer readable media, which contains computer readable program code.

[0070] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A combined control method for an air intake and heat dissipation system of an agricultural machine, characterized in that, The air intake and heat dissipation system comprises a radiator, a fan, a wind guide cover, a dust suction channel, an air filter, a crankshaft speed sensor, a coolant temperature sensor, a resistance alarm sensor, a first electromagnetic valve, a driving device, a second electromagnetic valve and a processor; the radiator and the fan are respectively arranged at two ends of the wind guide cover, and the wind guide cover is communicated with a dust discharge port of the air filter through the dust suction channel; The crankshaft speed sensor is used to detect the engine speed of the controlled agricultural machine and transmit the engine speed to the electronic control unit of the controlled agricultural machine; The coolant temperature sensor is used to detect the coolant temperature of the controlled agricultural machine and transmit the coolant temperature to the electronic control unit of the controlled agricultural machine; The resistance alarm sensor is used to detect the air filter resistance value of the controlled agricultural machine; The first electromagnetic valve is connected to the dust suction channel; The driving device is used to provide driving for the fan to execute the blowing mode; The second electromagnetic valve is connected to the power source pipeline of the driving device; The processor is electrically connected with the electronic control unit of the controlled agricultural machine, the resistance alarm sensor, the first electromagnetic valve and the second electromagnetic valve respectively; The air filter comprises a main air filter and a pre-filter, the dust suction channel comprises a main air filter channel and a pre-filter channel, the first electromagnetic valve comprises a main air filter electromagnetic valve and a pre-filter electromagnetic valve, the main air filter is connected with the main air filter channel, the pre-filter is connected with the pre-filter channel, the main air filter electromagnetic valve is connected to the main air filter channel, and the pre-filter electromagnetic valve is connected to the pre-filter channel; The control method comprises: obtaining the engine speed, the coolant temperature and the air filter resistance value of the controlled agricultural machine; judging whether the first preset condition or the second preset condition is met based on the engine speed, the coolant temperature and the air filter resistance value; when the first preset condition is met, controlling the fan to switch to the 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 the air suction mode, and controlling the dust suction channel to open to clean the air filter; wherein the first preset condition comprises: 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; the second preset condition comprises: the engine speed is less than or equal to the second preset speed and greater than a 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 a preset resistance value.

2. The combined control method of the air intake and heat dissipation system of the agricultural machine according to claim 1, characterized in that, Further comprising: when the engine speed, the coolant temperature and the air filter resistance value do not meet the first preset condition and the second preset condition, controlling the fan to maintain in the air suction mode, and keeping the dust suction channel closed.

3. The combined air intake and heat dissipation system control method for an agricultural machine of claim 1, wherein, Further comprising: when the engine speed, the coolant temperature and the air filter resistance value do not meet the first preset condition and the second preset condition, controlling the fan to maintain in the air suction mode, and keeping the dust suction channel closed. If the current coolant temperature is greater than or equal to a start protection threshold, the fan is switched to a blowing mode to clean the radiator, and the dust suction channel is kept closed.

4. The combined control method of the air intake and heat dissipation system of the agricultural machine according to claim 3, characterized in that, The start protection threshold is 60°C.

5. The combined air intake and heat dissipation system control method for agricultural machinery according to any one of claims 1 to 4, characterized in that, The driving device is a hydraulic pump or a gas pump.

6. An agricultural machine characterized by, The air intake and heat dissipation system combined control system of the agricultural machine adopts the control method according to any one of claims 1 to 5 to automatically maintain the agricultural machine.

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