Control methods, devices, equipment and storage media for agricultural machinery heat dissipation systems

Abstract

This application discloses a control method, device, equipment, and storage medium for an agricultural machinery cooling system. Based on the real-time temperature signal of the agricultural machinery engine, a target fan operating mode is determined. If the cooling fan operates in the target fan operating mode, it can meet the basic cooling needs to a certain extent. Then, based on the on / off status of the agricultural machinery air conditioner or the regeneration status of the agricultural machinery's DPF, it is determined whether there are additional cooling needs. If so, the target fan operating mode is adjusted to increase the reversal frequency, resulting in an adjusted fan operating mode. If the cooling fan operates in the adjusted fan operating mode, it can meet both the basic and additional cooling needs to a certain extent. This application's solution considers factors such as real-time temperature signals, air conditioner status, and DPF regeneration status when controlling the cooling fan, determining and meeting more accurate cooling needs, thereby improving the cooling effect of the agricultural machinery cooling system to a certain extent.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a control method, device, equipment, and storage medium for an agricultural machinery cooling system. Background Technology

[0002] The working environment of agricultural machinery usually contains a lot of dust and debris, which increases the possibility of clogging of the agricultural machinery's heat dissipation equipment and has an adverse effect on the operation of the agricultural machinery.

[0003] For example, when a harvester is harvesting, weeds, straw, and other debris may adhere to the surface of the harvester's radiator, which may reduce the radiator's heat dissipation efficiency and increase engine water temperature, thus affecting the harvester's usability.

[0004] Therefore, how to prevent the cooling equipment of agricultural machinery from becoming clogged in order to ensure the cooling effect of agricultural machinery has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above problems, this application is made to provide a control method, device, equipment and storage medium for agricultural machinery heat dissipation system, so as to reduce the possibility of the heat dissipation equipment of agricultural machinery being blocked.

[0006] The specific plan is as follows:

[0007] Firstly, a control method for an agricultural machinery heat dissipation system is provided, including:

[0008] Acquire the real-time temperature signal of the engine of the controlled agricultural machinery;

[0009] Based on the mapping relationship between pre-configured temperature conditions and fan operating modes, the target temperature condition satisfied by the real-time temperature signal is determined, and the target fan operating mode corresponding to the target temperature condition is determined; the temperature represented by the real-time temperature signal is positively correlated with the reversal frequency of the target fan operating mode;

[0010] Based on the on / off status of the air conditioner of the agricultural machinery and / or the DPF regeneration status of the particulate filter (DPF) of the agricultural machinery, determine whether there is an additional heat dissipation requirement.

[0011] If not, control the cooling fan of the agricultural machine to make the cooling fan operate in the target fan operating mode;

[0012] If present, the target fan operating mode is adjusted according to a preset rule to obtain an adjusted fan operating mode; the reversal frequency of the adjusted fan operating mode is greater than the reversal frequency of the target fan operating mode.

[0013] Control the cooling fan to make it operate in the adjusted fan operation mode.

[0014] Secondly, a control device for an agricultural machinery heat dissipation system is provided, comprising:

[0015] Temperature signal acquisition unit, used to acquire real-time temperature signal of the engine of the controlled agricultural machinery;

[0016] The operation mode determination unit is used to determine the target temperature condition satisfied by the real-time temperature signal based on the pre-configured mapping relationship between temperature conditions and fan operation modes, and to determine the target fan operation mode corresponding to the target temperature condition. The temperature represented by the real-time temperature signal is positively correlated with the reversal frequency of the target fan operation mode. Furthermore, based on the on / off status of the agricultural machinery's air conditioner and / or the DPF regeneration status of the agricultural machinery's particulate filter (DPF), it determines whether there is an additional heat dissipation requirement. If there is an additional heat dissipation requirement, the target fan operation mode is adjusted according to a preset rule to obtain an adjusted fan operation mode. The reversal frequency of the adjusted fan operation mode is greater than the reversal frequency of the target fan operation mode.

[0017] A cooling fan control unit is configured to control the cooling fan of the agricultural machinery to operate in the target fan operating mode when there is no additional cooling demand; and to control the cooling fan to operate in the adjusted fan operating mode when there is an additional cooling demand.

[0018] Thirdly, a control device for an agricultural machinery heat dissipation system is provided, including: a memory and a processor;

[0019] The memory is used to store programs;

[0020] The processor is used to execute the program to implement the various steps of the above-described control method for the agricultural machinery heat dissipation system.

[0021] Fourthly, a storage medium is provided on which a computer program is stored, which, when executed by a processor, implements the various steps of the control method for the agricultural machinery heat dissipation system described above.

[0022] By employing the above technical solution, this application first acquires the real-time temperature signal of the engine of the controlled agricultural machinery, which can characterize the current basic heat dissipation demand. Then, based on the mapping relationship between pre-configured temperature conditions and fan operating modes, the target temperature condition satisfied by the real-time temperature signal is determined, and the target fan operating mode corresponding to the target temperature condition is determined. The higher the current basic heat dissipation demand, the higher the reversal frequency of the determined target fan operating mode. Furthermore, based on the on / off status of the agricultural machinery's air conditioner and / or the DPF regeneration status of the agricultural machinery's particulate filter (DPF), it is determined whether there is an additional heat dissipation demand. It should be noted that debris attached to the heat dissipation equipment can affect the cooling effect of the air conditioner, and DPF regeneration of the particulate filter increases the risk of spontaneous combustion of debris attached to the heat dissipation equipment. In other words, when the agricultural machinery's air conditioner is on or the particulate filter is regenerating, the heat dissipation demand of the agricultural machinery's heat dissipation system is higher. The basic heat dissipation demand represented by the real-time temperature signal and the aforementioned additional heat dissipation demand can be used as the total heat dissipation demand of the agricultural machinery's heat dissipation system. This solution determines a more accurate heat dissipation demand. Furthermore, by adjusting the target fan's operating mode according to preset rules when additional heat dissipation requirements exist, an adjusted fan operating mode is obtained. The cooling fan is then controlled to operate within this adjusted mode. It should be noted that the reversal frequency of the adjusted fan operating mode is greater than that of the target fan operating mode. Therefore, compared to the case without additional heat dissipation requirements, this solution allows for more frequent reversal of the cooling fan when additional heat dissipation requirements exist. This enables more timely cleaning of debris adhering to the cooling equipment, reducing the likelihood of blockages in the agricultural machinery's cooling system and improving its overall cooling performance. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 A flowchart illustrating a control method for an agricultural machinery heat dissipation system provided in an embodiment of this application;

[0025] Figure 2 An example is a schematic diagram of the structure of an agricultural machinery heat dissipation system;

[0026] Figure 3 This is a schematic diagram of the structure of a control device for an agricultural machinery heat dissipation system provided in an embodiment of this application;

[0027] Figure 4 A schematic diagram of the structure of the control device for the agricultural machinery heat dissipation system provided in the embodiments of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] This application provides a control method, device, equipment, and storage medium for an agricultural machinery heat dissipation system to reduce the possibility of the heat dissipation equipment of agricultural machinery being blocked.

[0030] For example, the agricultural machinery cooling system may include: an engine, a particulate filter (DPF), an air conditioning compressor, cooling equipment, and a cooling fan.

[0031] The particulate filter (DPF) captures exhaust particulate matter (PM). DPF regeneration burns away the captured PM, restoring the DPF to a low-resistance state. The air conditioning compressor is located on the intake side at the front of the engine and is driven by the front axle. Driving the cooling fan dissipates heat from the cooling system; furthermore, reversing the fan's rotation direction cleans debris adhering to the cooling system. In other words, forward rotation of the cooling fan is used for cooling, while reverse rotation is used for cleaning.

[0032] Optionally, the cooling fan can be driven by an electromagnetic clutch. To drive the cooling fan to rotate forward, it can be driven by a forward belt connected to the electromagnetic clutch; to drive the cooling fan to rotate in reverse, it can be driven by a reverse belt connected to the electromagnetic clutch.

[0033] In another possible implementation, the cooling fan can be controlled to rotate alternately in both directions by hydraulically driving the blades.

[0034] Figure 1 This is a flowchart illustrating a control method for an agricultural machinery heat dissipation system according to an embodiment of this application, combined with... Figure 1 As shown, the control method may include:

[0035] Step S101: Obtain the real-time temperature signal of the engine of the controlled agricultural machinery.

[0036] The real-time temperature signal can be collected using a sensor installed at the engine.

[0037] Step S102: Based on the mapping relationship between the pre-configured temperature conditions and the fan operating mode, determine the target temperature condition that the real-time temperature signal satisfies, and determine the target fan operating mode corresponding to the target temperature condition.

[0038] For example, the mapping relationship between the pre-configured temperature conditions and fan operating modes can be represented as: several different fan operating modes and the corresponding temperature conditions for each fan operating mode. It should be noted that different temperature conditions represent different temperature conditions, and different fan operating modes have different reversal frequencies. The more severe the temperature condition represented by the temperature condition—for example, the higher the temperature and the greater the heat dissipation demand—the higher the reversal frequency of the corresponding fan operating mode. In other words, the temperature represented by the real-time temperature signal is positively correlated with the reversal frequency of the target fan operating mode. By setting multiple fan operating modes, the current heat dissipation demand can be met more accurately.

[0039] The fan reversal frequency can be represented as the ratio of the reversal duration of the cooling fan to the total duration of one operating cycle. A higher reversal frequency indicates more frequent reversals. Optionally, the minimum reversal frequency can be 0. Alternatively, the reversal frequency can be characterized by the time interval between the start (or end) times of two adjacent reversal phases. Since fan reversal can be used to clean debris adhering to the cooling equipment, increasing the fan reversal frequency within a certain range can promptly clean the cooling equipment, prevent clogging, and thus ensure the cooling effect.

[0040] Step S103: Determine if there is any additional heat dissipation requirement. If not, proceed to step S104; if yes, proceed to step S105.

[0041] Specifically, step S103 may include: determining whether there is an additional heat dissipation requirement based on the on / off status of the air conditioner of the agricultural machine and / or the DPF regeneration status of the particulate filter (DPF) of the agricultural machine.

[0042] It should be noted that when the air conditioner of the agricultural machinery is on, if the air conditioner or heat dissipation equipment is blocked by debris or the heat dissipation effect of the heat dissipation equipment is reduced, it will affect the cooling effect of the air conditioner. When the agricultural machinery is undergoing DPF regeneration, the surface temperature of the particulate filter (DPF) may reach 150-200℃, and the straw and other debris adhering to the surface of the DPF can easily spontaneously combust, leading to a safety hazard. Therefore, if the air conditioner of the agricultural machinery is on, or if the particulate filter (DPF) of the agricultural machinery begins DPF regeneration, it indicates that there is an additional heat dissipation demand, and the requirements for heat dissipation effect are higher.

[0043] Step S104: Control the cooling fan of the agricultural machine so that the cooling fan operates in the target fan operation mode.

[0044] In other words, for cases where there is no additional heat dissipation requirement, controlling the cooling fan to operate in the target fan operating mode can, to a certain extent, meet the basic heat dissipation requirements determined by the real-time temperature signal.

[0045] Step S105: Adjust the target fan operating mode according to the preset rules to obtain the adjusted fan operating mode.

[0046] Step S106: Control the cooling fan to make the cooling fan operate in the adjusted fan operation mode.

[0047] The reversal frequency of the adjusted fan operating mode is greater than that of the target fan operating mode. In other words, for situations with additional cooling requirements, a reversal frequency needs to be added to the target fan operating mode's reversal frequency to determine a new fan operating mode, i.e., the adjusted fan operating mode. Then, the cooling fan is controlled to operate in the adjusted fan operating mode to meet the basic cooling requirements determined by the real-time temperature signal and the additional cooling requirements determined by the air conditioner's on / off status or DPF regeneration status.

[0048] The above method, when determining the operating mode of the cooling fan, considers not only the engine temperature but also the air conditioning status or DPF regeneration status of the agricultural machinery, thus determining a more accurate cooling requirement. By increasing the reversal frequency of the cooling fan when additional cooling requirements exist, the additional cooling requirements determined by the air conditioning on / off status or DPF regeneration status are met. This also enables timely cleaning of debris attached to the cooling system, which can improve the cooling effect of the cooling equipment, improve the cooling effect of the agricultural machinery's air conditioning, reduce the risk of spontaneous combustion of straw and other debris, and improve the safety and availability of the agricultural machinery.

[0049] In some embodiments provided in this application, the real-time temperature signal may include: the temperature value of engine coolant, the temperature value of engine intake air, and the temperature value of engine transmission oil.

[0050] For example, the heat dissipation device may include an intercooler and a radiator. The intercooler can reduce the engine intake air temperature, and an intake air temperature sensor can be installed on the engine intake manifold to collect the engine intake air temperature after intercooling. The radiator provides low-temperature coolant to the engine, and the high-temperature coolant flowing out of the engine can flow back to the radiator via the cylinder head thermostat seat. A water temperature sensor can be installed on the cylinder head thermostat seat to collect the engine water temperature. It should be noted that as engine speed and power increase, the generated heat will increase, specifically manifested as an increase in engine water temperature and intake air temperature. Furthermore, the heat dissipation system may also include a hydraulic oil tank, which provides hydraulic oil to drive the drive system. An oil temperature sensor can be installed at the output end of the hydraulic oil tank to collect the engine transmission oil temperature. It should be noted that if the engine transmission oil temperature is too high, it will affect the function of the hydraulic drive components, such as driving the drive system or driving the entire machine. Therefore, when determining the current basic cooling requirements, engine coolant temperature, engine intake air temperature, and engine transmission oil temperature can be considered comprehensively. For example, Figure 2 A schematic diagram of a heat dissipation system for agricultural machinery is shown.

[0051] Based on the above, the mapping relationship between the pre-configured temperature conditions and fan operating modes includes: several different fan operating modes and the corresponding temperature ranges of engine coolant temperature, engine intake air temperature, and engine transmission oil temperature; different fan operating modes have different reversal frequencies.

[0052] In other words, the different fan operating modes can be represented by different reverse gears, such as: reverse gear 0 (i.e. forward gear), reverse gear 1, reverse gear 2, etc. As the reverse gear increases, the reverse frequency increases and the time interval between each two reverse rotations decreases.

[0053] Furthermore, if the preset fan operating modes are arranged in ascending order of reversal frequency, then for any temperature range of engine coolant temperature, engine intake air temperature, and engine transmission oil temperature corresponding to any two adjacent fan operating modes, the right boundary of the temperature range of the previous temperature type is equal to the left boundary of the temperature range of the next temperature type. That is, for any temperature type, the two temperature ranges of that temperature type corresponding to adjacent fan operating modes are adjacent and do not intersect. Optionally, the boundary point of the two temperature ranges can belong to the next temperature range or the previous temperature range.

[0054] Based on this, step S102 above, which determines the target temperature condition satisfied by the real-time temperature signal according to the mapping relationship between the pre-configured temperature conditions and the fan operating mode, and determines the target fan operating mode corresponding to the target temperature condition, may include:

[0055] Step A: Based on the mapping relationship between the pre-configured temperature conditions and the fan operating mode, for each temperature type among engine coolant temperature, engine intake air temperature, and engine transmission oil temperature, determine the target temperature value range of the temperature type to which the temperature value of the temperature type in the real-time temperature signal belongs.

[0056] Step B: Determine the target fan operating mode corresponding to the target temperature range for each of the aforementioned temperature types.

[0057] Step C: Determine the target fan operating mode with the highest reversal frequency among all the target fan operating modes as the final target fan operating mode.

[0058] For example, suppose four different fan operating modes are preset: reverse gear 0 (i.e. forward gear), reverse gear 1, reverse gear 2, and reverse gear 3. The reverse gear is positively correlated with its reverse frequency. If the fan operating mode corresponding to the engine coolant temperature value in the real-time temperature signal is reverse gear 1, and the fan operating mode corresponding to the engine intake air temperature value and the engine transmission oil temperature value in the real-time temperature signal is reverse gear 0, then the final target fan operating mode is determined to be reverse gear 1.

[0059] In some embodiments provided in this application, the real-time temperature signal may include: the temperature value of engine coolant, the temperature value of engine intake air, the temperature value of engine transmission oil, the rate of change of engine coolant, the rate of change of engine intake air, and the rate of change of engine transmission oil.

[0060] Based on the above, the mapping relationship between the pre-configured temperature conditions and the fan operating mode may include: several different fan operating modes and the corresponding temperature ranges of engine coolant temperature, engine intake air temperature, engine transmission oil temperature, engine coolant temperature change rate, engine intake air temperature change rate, and engine transmission oil temperature change rate; different fan operating modes have different reversal frequencies.

[0061] It should be noted that if the preset fan operating modes are arranged in ascending order of reversal frequency, then for any temperature type change rate range among engine coolant temperature, engine intake air temperature, and engine transmission oil temperature corresponding to any two adjacent fan operating modes, the right boundary of the change rate range of the preceding temperature type is equal to the left boundary of the change rate range of the following temperature type. That is, for any temperature type, the two change rate ranges corresponding to adjacent fan operating modes are adjacent and do not overlap. Optionally, the boundary point of two change rate ranges can belong to the following change rate range or to the preceding change rate range. Furthermore, other explanations can be found above.

[0062] Based on this, step S102 above, which determines the target temperature condition satisfied by the real-time temperature signal according to the mapping relationship between the pre-configured temperature conditions and the fan operating mode, and determines the target fan operating mode corresponding to the target temperature condition, may include the following steps:

[0063] Step D: Based on the mapping relationship between the pre-configured temperature conditions and the fan operating mode, for each temperature type among engine coolant temperature, engine intake air temperature, and engine transmission oil temperature, determine the target temperature value range of the temperature type to which the temperature value of the temperature type in the real-time temperature signal belongs, and determine the target rate of change range of the temperature type that the rate of change of the temperature type in the real-time temperature signal satisfies.

[0064] Step E: Determine the target fan operation mode corresponding to the target temperature value range for each of the temperature types, and determine the target fan operation mode corresponding to the target rate of change range for each of the temperature types.

[0065] Step F: Determine the target fan operating mode with the highest reversal frequency among all the target fan operating modes as the final target fan operating mode.

[0066] For example, assume that four different fan operating modes are preset: Reverse 0 (i.e., forward rotation), Reverse 1, Reverse 2, and Reverse 3, with the reverse gear being positively correlated with its reversal frequency. The temperature conditions corresponding to Reverse 0 can include a first temperature range and a first rate of change range for each of the following temperature types: engine coolant temperature, engine intake air temperature, and engine transmission oil temperature. In Reverse 0, the cooling fan only rotates forward. The temperature conditions corresponding to Reverse 1 can include a second temperature range and a second rate of change range for each of the following temperature types: engine coolant temperature, engine intake air temperature, and engine transmission oil temperature. In Reverse 1, the cooling fan rotates periodically in both forward and reverse directions. One operating cycle can sequentially include: a forward rotation phase with a first preset forward rotation time, a stop phase with a first preset stop time, a reverse rotation phase with a preset reverse rotation time, and a stop phase with a second preset stop time. The first preset stop time and the second preset stop time can be the same. For example, the first preset stop time and the second preset stop time can be set according to the time required for the cooling fan to decrease from its rated speed to stop. The temperature conditions corresponding to Reverse Gear 2 can include: a third temperature value range and a third rate of change range for each of the following temperature types: engine coolant temperature, engine intake air temperature, and engine transmission oil temperature. In Reverse Gear 2, the cooling fan rotates periodically in both directions, and one operating cycle can sequentially include: a forward rotation phase of a second preset forward rotation time, a stop phase of a first preset stop time, a reverse rotation phase of a preset reverse rotation time, and a stop phase of a second preset stop time. The temperature conditions corresponding to Reverse Gear 3 can include: a fourth temperature value range and a fourth rate of change range for each of the following temperature types: engine coolant temperature, engine intake air temperature, and engine transmission oil temperature. In Reverse Gear 3, the cooling fan rotates periodically in both directions, and one operating cycle can sequentially include: a forward rotation phase of a third preset forward rotation time, a stop phase of a first preset stop time, a reverse rotation phase of a preset reverse rotation time, and a stop phase of a second preset stop time. Specifically, the first preset forward rotation time is greater than the second preset forward rotation time, which is greater than the third preset forward rotation time. Taking the engine coolant temperature range as an example, the right boundary of the first engine coolant temperature range is equal to the left boundary of the second engine coolant temperature range, the right boundary of the second engine coolant temperature range is equal to the left boundary of the third engine coolant temperature range, and the right boundary of the third engine coolant temperature range is equal to the left boundary of the fourth engine coolant temperature range. The aforementioned first preset forward rotation time, second preset forward rotation time, third preset forward rotation time, first preset stop time, preset reverse rotation time, and second preset stop time can all be set according to actual operating conditions.

[0067] If the fan operating mode corresponding to the engine coolant temperature value in the real-time temperature signal is reverse gear 1, the fan operating mode corresponding to the engine intake air temperature and engine transmission oil temperature in the real-time temperature signal is reverse gear 0, the fan operating mode corresponding to the change in engine coolant temperature in the real-time temperature signal is reverse gear 2, and the fan operating mode corresponding to the rate of change of engine intake air temperature and engine transmission oil temperature in the real-time temperature signal is reverse gear 1, then the final target fan operating mode is determined to be reverse gear 2.

[0068] Optionally, the fan operating mode may include: a forward rotation mode and several different alternating forward and reverse rotation operating modes. The forward rotation mode only includes a forward rotation phase, and one operating cycle of the alternating forward and reverse rotation operating modes includes, in sequence: a forward rotation phase, a stop phase, a reverse rotation phase, and a stop phase.

[0069] When switching the fan operating mode of the cooling fan, the following control methods can be adopted, which may include: determining whether the cooling fan is currently in the forward rotation phase; if so, controlling the cooling fan to keep rotating forward until the duration of the forward rotation of the cooling fan exceeds the duration of the forward rotation phase specified by the switching target; if the duration of the forward rotation of the cooling fan exceeds the duration of the forward rotation phase specified by the switching target, controlling the cooling fan to work in the fan operating mode corresponding to the switching target, that is, to run in each phase after the forward rotation phase.

[0070] In some embodiments provided in this application, the agricultural machinery cooling system may further include a forced switch for manual triggering of reversal. After the forced switch is manually closed, a forced reversal signal is generated for the agricultural machinery cooling system to respond to.

[0071] Based on the above, the control method may further include:

[0072] When the cooling fan is rotating in the forward direction, in response to the received forced reverse signal, the cooling fan is forced to reverse, so that the cooling fan sequentially performs: stopping for a preset stop time, reversing for a preset reverse time, and stopping for the preset stop time.

[0073] The forced reversal signal is manually triggered.

[0074] It should be noted that when the cooling fan stops or reverses, it will not respond to the received forced reverse signal to avoid frequent reversals. The forward rotation of the cooling fan can correspond to the cooling fan operating in the forward rotation mode, or the cooling fan operating in the forward phase of any of the alternating forward and reverse rotation operating modes. Furthermore, after completing the forced reverse control of the cooling fan, it can be controlled to continue operating in a fan operating mode determined by the real-time temperature signal and the current additional cooling requirements.

[0075] In some embodiments provided in this application, the forced reverse control of the cooling fan may include:

[0076] If the time interval between the current moment and the end moment of the previous reversal exceeds the preset forced reversal interval, the cooling fan is forced to reverse.

[0077] The control method described above can reduce the reversal frequency by setting a preset forced reversal interval, thus avoiding frequent reversals of the cooling fan. In another possible implementation, the forced reversal interval can be started after the cooling fan has completed a preset stop time, a preset reversal time, and a preset stop time.

[0078] Optionally, the forced reversal interval is greater than the total time taken for the cooling fan to stop for a preset stop time, reverse for a preset reversal time, and stop for the preset stop time.

[0079] Specifically, if the cooling fan is operating in a high-frequency reverse mode, that is, the current reverse frequency is close to the preset maximum reverse frequency, it is not necessary to respond to the forced reverse signal and not to force the cooling fan to reverse, so as to avoid the cooling fan frequently back-blowing, thereby improving the service life of the cooling fan, belt, electromagnetic clutch, etc.

[0080] In some embodiments provided in this application, the control method further includes:

[0081] If the real-time temperature signal fails to be acquired, the cooling fan is controlled to operate in a fan mode with a preset maximum reversal frequency.

[0082] One possible reason for the failure to acquire the real-time temperature signal is a malfunction in the water temperature sensor, intake air temperature sensor, or transmission oil temperature sensor used to collect the temperature signal. In such cases, the cooling fan is controlled to reverse at the maximum reversal frequency to promptly remove straw and other debris adhering to the cooling equipment, ensuring the usability of the agricultural machinery.

[0083] Optionally, the control method for the agricultural machinery heat dissipation system provided in this application embodiment can be executed periodically, that is, the various steps of the above control method are executed sequentially according to a preset execution cycle; or it can be conditionally triggered. For example, when the real-time temperature signal is detected to be mismatched with the current fan operating mode, or when an additional heat dissipation requirement is detected to change, the various steps of the above control method are executed.

[0084] The control device for the agricultural machinery heat dissipation system provided in the embodiments of this application is described below. The control device for the agricultural machinery heat dissipation system described below can be referred to in correspondence with the control method for the agricultural machinery heat dissipation system described above.

[0085] See Figure 3 , Figure 3 This is a schematic diagram of the structure of a control device for an agricultural machinery heat dissipation system disclosed in an embodiment of this application.

[0086] like Figure 3 As shown, the control device for the agricultural machinery cooling system may include:

[0087] Temperature signal acquisition unit 11 is used to acquire the real-time temperature signal of the engine of the controlled agricultural machinery;

[0088] The operation mode determination unit 12 is used to determine the target temperature condition satisfied by the real-time temperature signal based on the pre-configured mapping relationship between temperature conditions and fan operation modes, and to determine the target fan operation mode corresponding to the target temperature condition. The temperature represented by the real-time temperature signal is positively correlated with the reversal frequency of the target fan operation mode. It also determines whether there is an additional heat dissipation requirement based on the on / off status of the agricultural machinery's air conditioner and / or the DPF regeneration status of the agricultural machinery's particulate filter (DPF). If there is an additional heat dissipation requirement, it adjusts the target fan operation mode according to a preset rule to obtain an adjusted fan operation mode. The reversal frequency of the adjusted fan operation mode is greater than the reversal frequency of the target fan operation mode.

[0089] The cooling fan control unit 13 is used to control the cooling fan of the agricultural machine to operate in the target fan operation mode when there is no additional cooling demand; and to control the cooling fan to operate in the adjusted fan operation mode when there is an additional cooling demand.

[0090] In some embodiments provided in this application, the real-time temperature signal may include: the temperature value of engine coolant, the temperature value of engine intake air, and the temperature value of engine transmission oil; the mapping relationship between the pre-configured temperature conditions and the fan operating mode may include: several different fan operating modes and the corresponding temperature ranges of engine coolant, engine intake air, and engine transmission oil; different fan operating modes have different reversal frequencies.

[0091] Based on the above, the process by which the operation mode determination unit 12 determines the target temperature condition satisfied by the real-time temperature signal according to the pre-configured mapping relationship between temperature conditions and fan operation modes, and determines the target fan operation mode corresponding to the target temperature condition, may include:

[0092] Based on the mapping relationship between pre-configured temperature conditions and fan operating modes, for each temperature type among engine coolant temperature, engine intake air temperature, and engine transmission oil temperature, the target temperature value range of the temperature type to which the temperature value of the temperature type in the real-time temperature signal belongs is determined.

[0093] Determine the target fan operating mode corresponding to the target temperature range for each of the aforementioned temperature types;

[0094] The target fan operating mode with the highest reversal frequency among the various target fan operating modes is determined as the final target fan operating mode.

[0095] In some embodiments provided in this application, the real-time temperature signal may include: engine coolant temperature, engine intake air temperature, engine transmission oil temperature, engine coolant temperature change rate, engine intake air temperature change rate, and engine transmission oil temperature change rate; the mapping relationship between the pre-configured temperature conditions and fan operating modes may include: several different fan operating modes and the corresponding ranges of engine coolant temperature, engine intake air temperature, engine transmission oil temperature, engine coolant temperature change rate, engine intake air temperature change rate, and engine transmission oil temperature change rate; different fan operating modes have different reversal frequencies.

[0096] Based on the above, the process by which the operation mode determination unit 12 determines the target temperature condition satisfied by the real-time temperature signal according to the pre-configured mapping relationship between temperature conditions and fan operation modes, and determines the target fan operation mode corresponding to the target temperature condition, may include:

[0097] Based on the mapping relationship between pre-configured temperature conditions and fan operating modes, for each temperature type among engine coolant temperature, engine intake air temperature and engine transmission oil temperature, the target temperature value range of the temperature type to which the temperature value of the temperature type in the real-time temperature signal belongs is determined, and the target rate of change range of the temperature type that the rate of change of the temperature type in the real-time temperature signal satisfies is determined.

[0098] The target fan operation mode corresponding to the target temperature value range of each temperature type is determined respectively, and the target fan operation mode corresponding to the target rate of change range of each temperature type is determined respectively;

[0099] The target fan operating mode with the highest reversal frequency among the various target fan operating modes is determined as the final target fan operating mode.

[0100] In some embodiments provided in this application, the fan operating mode may include: a forward rotation mode and several different forward and reverse rotation alternating operating modes. One operating cycle of the forward and reverse rotation alternating operating mode includes: a forward rotation phase, a stop phase, a reverse rotation phase, and a stop phase.

[0101] In some embodiments provided in this application, the control device of the agricultural machinery heat dissipation system may further include: a forced reversal response unit, used to, in response to a received forced reversal signal, forcibly reverse control of the heat dissipation fan when the heat dissipation fan is rotating forward, so that the heat dissipation fan sequentially performs: stopping for a preset stop time, reversing for a preset reversal time, and stopping for the preset stop time; wherein, the forced reversal signal is manually triggered.

[0102] In some embodiments provided in this application, the process by which the forced reversal response unit performs forced reversal control on the cooling fan may include:

[0103] If the time interval between the current moment and the end moment of the previous reversal exceeds the preset forced reversal interval, the cooling fan is forced to reverse.

[0104] In some embodiments provided in this application, the cooling fan control unit 13 can also be used to: control the cooling fan in the event of failure to acquire the real-time temperature signal, so that the cooling fan operates in a fan operation mode with a preset maximum reversal frequency.

[0105] The control device for the agricultural machinery cooling system provided in this application embodiment can be applied to control equipment for agricultural machinery cooling systems, such as terminals with data processing capabilities: Electronic Control Unit (ECU), computers, etc. Specifically, the ECU can be connected to a vehicle relay via a relay connector, so that the vehicle relay can control the electromagnetic clutch used to drive the cooling fan, thereby achieving control of the cooling fan. Optionally, Figure 4 The hardware structure block diagram of the control equipment for the agricultural machinery heat dissipation system is shown. (Refer to...) Figure 4 The hardware structure of the control equipment for the agricultural machinery heat dissipation system may include: at least one processor 1, at least one communication interface 2, at least one memory 3, and at least one communication bus 4;

[0106] In this embodiment of the application, the number of processor 1, communication interface 2, memory 3, and communication bus 4 is at least one, and processor 1, communication interface 2, and memory 3 communicate with each other through communication bus 4;

[0107] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0108] Memory 3 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device;

[0109] The memory stores a program, which the processor can call. The program is used for:

[0110] Acquire the real-time temperature signal of the engine of the controlled agricultural machinery;

[0111] Based on the mapping relationship between pre-configured temperature conditions and fan operating modes, the target temperature condition satisfied by the real-time temperature signal is determined, and the target fan operating mode corresponding to the target temperature condition is determined; the temperature represented by the real-time temperature signal is positively correlated with the reversal frequency of the target fan operating mode;

[0112] Based on the on / off status of the air conditioner of the agricultural machinery and / or the DPF regeneration status of the particulate filter (DPF) of the agricultural machinery, determine whether there is an additional heat dissipation requirement.

[0113] If not, control the cooling fan of the agricultural machine to make the cooling fan operate in the target fan operating mode;

[0114] If present, the target fan operating mode is adjusted according to a preset rule to obtain an adjusted fan operating mode; the reversal frequency of the adjusted fan operating mode is greater than the reversal frequency of the target fan operating mode.

[0115] Control the cooling fan to make it operate in the adjusted fan operation mode.

[0116] Optionally, the refined and extended functions of the program can be found in the description above.

[0117] This application embodiment also provides a storage medium that can store a program suitable for execution by a processor, the program being used for:

[0118] Acquire the real-time temperature signal of the engine of the controlled agricultural machinery;

[0119] Based on the mapping relationship between pre-configured temperature conditions and fan operating modes, the target temperature condition satisfied by the real-time temperature signal is determined, and the target fan operating mode corresponding to the target temperature condition is determined; the temperature represented by the real-time temperature signal is positively correlated with the reversal frequency of the target fan operating mode;

[0120] Based on the on / off status of the air conditioner of the agricultural machinery and / or the DPF regeneration status of the particulate filter (DPF) of the agricultural machinery, determine whether there is an additional heat dissipation requirement.

[0121] If not, control the cooling fan of the agricultural machine to make the cooling fan operate in the target fan operating mode;

[0122] If present, the target fan operating mode is adjusted according to a preset rule to obtain an adjusted fan operating mode; the reversal frequency of the adjusted fan operating mode is greater than the reversal frequency of the target fan operating mode.

[0123] Control the cooling fan to make it operate in the adjusted fan operation mode.

[0124] Optionally, the refined and extended functions of the program can be found in the description above.

[0125] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0126] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0127] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method for an agricultural machinery heat dissipation system, characterized in that, The control method includes: Acquire the real-time temperature signal of the engine of the controlled agricultural machinery; Based on the mapping relationship between pre-configured temperature conditions and fan operating modes, the target temperature condition satisfied by the real-time temperature signal is determined, and the target fan operating mode corresponding to the target temperature condition is determined; the temperature represented by the real-time temperature signal is positively correlated with the reversal frequency of the target fan operating mode; Based on the on / off status of the air conditioner of the agricultural machinery and / or the DPF regeneration status of the particulate filter (DPF) of the agricultural machinery, determine whether there is an additional heat dissipation requirement. If not, control the cooling fan of the agricultural machine to make the cooling fan operate in the target fan operating mode; If present, the target fan operating mode is adjusted according to a preset rule to obtain an adjusted fan operating mode; the reversal frequency of the adjusted fan operating mode is greater than the reversal frequency of the target fan operating mode. Control the cooling fan to make it operate in the adjusted fan operation mode; The real-time temperature signals include: engine coolant temperature, engine intake air temperature, and engine transmission oil temperature. The mapping relationship between the pre-configured temperature conditions and fan operating modes includes: several different fan operating modes and their corresponding temperature ranges for engine coolant temperature, engine intake air temperature, and engine transmission oil temperature; different fan operating modes have different reversal frequencies; The process of determining the target temperature condition satisfied by the real-time temperature signal based on the pre-configured mapping relationship between temperature conditions and fan operating modes, and determining the target fan operating mode corresponding to the target temperature condition, includes: Based on the mapping relationship between pre-configured temperature conditions and fan operating modes, for each temperature type among engine coolant temperature, engine intake air temperature, and engine transmission oil temperature, the target temperature value range of the temperature type to which the temperature value of the temperature type in the real-time temperature signal belongs is determined. Determine the target fan operating mode corresponding to the target temperature range for each of the aforementioned temperature types; The target fan operating mode with the highest reversal frequency among all the target fan operating modes is determined as the final target fan operating mode; The fan operating modes include: forward rotation mode and several different forward and reverse rotation alternating operating modes. One operating cycle of the forward and reverse rotation alternating operating modes includes: forward rotation phase, stop phase, reverse rotation phase and stop phase in sequence. The reversal frequency is the ratio of the reversal time of the cooling fan to the total duration of one operating cycle.

2. The control method for the agricultural machinery heat dissipation system according to claim 1, characterized in that, The real-time temperature signal also includes: the rate of change of engine coolant temperature, the rate of change of engine intake air temperature, and the rate of change of engine transmission oil temperature. The mapping relationship between the pre-configured temperature conditions and the fan operating mode also includes: several different fan operating modes and their corresponding engine coolant temperature change rate range, engine intake air temperature change rate range, and engine transmission oil temperature change rate range. The step of determining the target temperature condition satisfied by the real-time temperature signal based on the mapping relationship between pre-configured temperature conditions and fan operating modes, and determining the target fan operating mode corresponding to the target temperature condition, further includes: Based on the mapping relationship between pre-configured temperature conditions and fan operating modes, for each temperature type among engine coolant temperature, engine intake air temperature and engine transmission oil temperature, the target rate of change of the temperature type in the real-time temperature signal is determined to satisfy the target rate of change range of the temperature type. The target fan operation mode corresponding to the target temperature value range of each temperature type is determined respectively, and the target fan operation mode corresponding to the target rate of change range of each temperature type is determined respectively; The target fan operating mode with the highest reversal frequency among the various target fan operating modes is determined as the final target fan operating mode.

3. The control method for the agricultural machinery heat dissipation system according to claim 1 or 2, characterized in that, The control method further includes: When the cooling fan is rotating in the forward direction, in response to the received forced reverse signal, the cooling fan is forced to reverse, so that the cooling fan sequentially performs: stopping for a preset stop time, reversing for a preset reverse time, and stopping for the preset stop time; wherein, the forced reverse signal is manually triggered.

4. The control method for the agricultural machinery heat dissipation system according to claim 3, characterized in that, The forced reverse control of the cooling fan includes: If the time interval between the current moment and the end moment of the previous reversal exceeds the preset forced reversal interval, the cooling fan is forced to reverse.

5. The control method for the agricultural machinery heat dissipation system according to claim 1 or 2, characterized in that, The control method further includes: If the real-time temperature signal fails to be acquired, the cooling fan is controlled to operate in a fan operation mode with a preset maximum reversal frequency.

6. A control device for an agricultural machinery heat dissipation system, used to execute the control method for the agricultural machinery heat dissipation system according to any one of claims 1-5, characterized in that, include: Temperature signal acquisition unit, used to acquire real-time temperature signal of the engine of the controlled agricultural machinery; The operation mode determination unit is used to determine the target temperature condition satisfied by the real-time temperature signal based on the mapping relationship between the pre-configured temperature conditions and the fan operation mode, and to determine the target fan operation mode corresponding to the target temperature condition. The temperature represented by the real-time temperature signal is positively correlated with the reversal frequency of the target fan operation mode. Furthermore, based on the on / off status of the air conditioner of the agricultural machinery and / or the DPF regeneration status of the particulate filter (DPF) of the agricultural machinery, it is determined whether there is an additional heat dissipation requirement; if there is an additional heat dissipation requirement, the target fan operation mode is adjusted according to a preset rule to obtain an adjusted fan operation mode; wherein, the reversal frequency of the adjusted fan operation mode is greater than the reversal frequency of the target fan operation mode. A cooling fan control unit is configured to control the cooling fan of the agricultural machinery to operate in the target fan operating mode when there is no additional cooling demand; and to control the cooling fan to operate in the adjusted fan operating mode when there is an additional cooling demand.

7. A control device for an agricultural machinery heat dissipation system, characterized in that, include: Memory and processor; The memory is used to store programs; The processor is used to execute the program to implement each step of the control method for the agricultural machinery heat dissipation system as described in any one of claims 1-5.

8. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements each step of the control method for the agricultural machinery heat dissipation system as described in any one of claims 1-5.

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