Tractor thermal management control method, system, equipment and medium and tractor

Abstract

The invention relates to a tractor thermal management control method, system and device, a medium and a tractor. The method comprises the steps that the current operation environment temperature corresponding to the tractor, the cooling requirement of a battery and the refrigeration requirement of a passenger compartment are obtained; and a refrigerant loop and a low-temperature cooling liquid loop are controlled according to the current operation environment temperature, the cooling requirement and the refrigeration requirement so as to meet the cooling requirement of the battery and the refrigeration requirement of the passenger compartment. By means of the method, the refrigerant loop and the low-temperature cooling liquid loop can be controlled based on the current operation environment temperature corresponding to the tractor, the cooling requirement of the battery and the refrigeration requirement of the passenger compartment, so that the cooling requirement of the battery and the refrigeration requirement of the passenger compartment are met, and then the operation efficiency of the tractor can be improved under the operation working conditions in spring and autumn. The operation is ensured; and the fuel economy of the whole machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a tractor thermal management control method, system, equipment, medium and tractor. Background Art

[0002] Traditional hybrid tractors use a separate compressor to cool the battery, and if a separate electric compressor is used, an additional high-voltage box is required to power the compressor, which increases costs and energy consumption and reduces economic efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a tractor thermal management control method, system, device, medium and tractor, aiming to solve at least one of the above technical problems.

[0004] In a first aspect, the technical solution of the present invention to solve the above technical problem is as follows: a tractor thermal management control method, the method comprising: Obtain the current operating environment temperature, battery cooling requirements, and passenger compartment cooling requirements corresponding to the tractor; According to the current operating environment temperature, cooling demand and refrigeration demand, controlling the refrigerant circuit and the low-temperature coolant circuit to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; Among them, the low-temperature coolant circuit includes a first circuit formed by a heat dissipation pack, a four-way valve, a battery water pump and a power battery pack, the refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, a HAVC air-conditioning system, a cooling device and a second electromagnetic expansion valve, and a third circuit formed by a heat dissipation pack, a belt compressor, a cooling device and a second electromagnetic expansion valve.

[0005] The beneficial effect of the present invention is that the present solution can control the refrigerant circuit and the low-temperature coolant circuit based on the current operating environment temperature corresponding to the tractor, the cooling demand of the battery and the cooling demand of the passenger compartment to meet the cooling demand of the battery and the cooling demand of the passenger compartment, thereby ensuring operation and improving the fuel economy of the whole machine under the operating conditions in spring and autumn.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the above-mentioned controlling the refrigerant circuit and the low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand includes: When the current operating environment temperature is within the first temperature range, the cooling demand is cooling demand, and the refrigeration demand is no refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, and the heat of the battery is controlled to be taken away by the battery water radiator in the heat dissipation pack; When the current operating environment temperature is within the first temperature range, the cooling demand is that there is a cooling demand, and the refrigeration demand is that there is a refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, the heat of the battery is controlled to be taken away by the battery water radiator in the heat dissipation pack, the clutch of the belt compressor is controlled to be engaged, the first electromagnetic expansion valve is controlled to be opened, and the second electromagnetic expansion valve is controlled to be closed; When the current operating environment temperature is within the second temperature range, the cooling demand is for cooling demand, and the refrigeration demand is for no refrigeration demand, the second interface and the fourth interface of the four-way valve are controlled to be connected, the first electromagnetic expansion valve is controlled to be closed, the second electromagnetic expansion valve is controlled to be opened, and the clutch of the belt compressor is controlled to be engaged.

[0008] Further, when the current operating environment temperature is within the first temperature range, the cooling requirement is cooling requirement, the refrigeration requirement is no refrigeration requirement, and the battery temperature of the battery is greater than a first high temperature alarm threshold, the method further includes: The clutch of the belt compressor is controlled to engage, the first electromagnetic expansion valve is closed, the second electromagnetic expansion valve is controlled to open, and the second interface and the fourth interface of the four-way valve are controlled to be connected, so as to cool the battery.

[0009] Further, when the current operating environment temperature is within the first temperature range, the cooling requirement is that there is a cooling requirement, the refrigeration requirement is that there is a refrigeration requirement, and the battery temperature of the battery is greater than a first high temperature alarm threshold, the method further includes: The second electromagnetic expansion valve is controlled to open, and the second interface and the fourth interface of the four-way valve are controlled to be connected.

[0010] Furthermore, the method further comprises: When the refrigeration demand is for single refrigeration, the clutch of the belt compressor is controlled to be engaged, the first electromagnetic expansion valve is controlled to be opened, and the second electromagnetic expansion valve is controlled to be closed.

[0011] Furthermore, the low-temperature coolant circuit also includes a fourth circuit formed by the four-way valve, the cooling device, the power battery pack and the battery water pump, and the method further includes: When the storage time of the whole machine is greater than the set time, the battery temperature of the battery is lower than the set threshold and needs to be recharged, and the engine of the tractor is not started or the engine cannot be started due to insufficient power, the battery is controlled to be connected to the charging pile and heated by a heating film.

[0012] In a second aspect, in order to solve the above technical problems, the present invention further provides a tractor thermal management control system, the system comprising: An acquisition module, used to acquire the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery and the cooling requirement of the passenger compartment; A cooling module, used to control a refrigerant circuit and a low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand, so as to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; Among them, the low-temperature coolant circuit includes a first circuit formed by a heat dissipation pack, a four-way valve, a battery water pump and a power battery pack, the refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, a HAVC air-conditioning system, a cooling device and a second electromagnetic expansion valve, and a third circuit formed by a heat dissipation pack, a belt compressor, a cooling device and a second electromagnetic expansion valve.

[0013] In a third aspect, in order to solve the above-mentioned technical problem, the present invention also provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, a tractor thermal management control method of the present application is implemented.

[0014] In a fourth aspect, in order to solve the above-mentioned technical problem, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, a tractor thermal management control method of the present application is implemented.

[0015] In a fifth aspect, in order to solve the above technical problem, the present invention further provides a tractor, which includes the electronic device described in the third aspect.

[0016] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments of the present invention are briefly introduced below.

[0018] Figure 1 A schematic flow chart of a tractor thermal management control method provided by one embodiment of the present invention; Figure 2 A schematic diagram of various circuits in a tractor thermal management control system provided by one embodiment of the present invention; Figure 3 A schematic diagram of the structure of a tractor thermal management control system provided by one embodiment of the present invention; Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

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

[0020] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0021] The solution provided by the embodiment of the present invention can be applied to any application scenario where the hybrid tractor needs to be thermally managed. The solution provided by the embodiment of the present invention can be executed by an electronic device with a data processing function, such as an electronic device with a data processing function installed on the tractor, such as a vehicle controller VCU.

[0022] The embodiment of the present invention provides a possible implementation method, such as Figure 1 As shown in FIG. 1 , a flow chart of a tractor thermal management control method is provided. The scheme can be executed by any electronic device, for example, a vehicle controller VCU. For the convenience of description, the method provided by the embodiment of the present invention will be described below by taking the vehicle controller VCU as an example of the execution subject. Figure 1 The method may include the following steps: S1, obtaining the current operating environment temperature, battery cooling requirements and passenger compartment cooling requirements corresponding to the tractor; S2, controlling a refrigerant circuit and a low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; Among them, the low-temperature coolant circuit includes a first circuit formed by a heat dissipation pack, a four-way valve, a battery water pump and a power battery pack, the refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, a HAVC air-conditioning system, a cooling device and a second electromagnetic expansion valve, and a third circuit formed by a heat dissipation pack, a belt compressor, a cooling device and a second electromagnetic expansion valve.

[0023] Through the method of the present invention, the refrigerant circuit and the low-temperature coolant circuit can be controlled based on the current operating environment temperature corresponding to the tractor, the cooling demand of the battery and the cooling demand of the passenger compartment, so as to meet the cooling demand of the battery and the cooling demand of the passenger compartment, thereby ensuring operation and improving the fuel economy of the whole machine under the operating conditions in spring and autumn.

[0024] The scheme of the present invention is further described below in conjunction with the following specific embodiments. In this embodiment, see Figure 2 The various circuits shown illustrate a tractor thermal management control method.

[0025] like Figure 2 As shown, the various circuits include a motor cooling circuit (the sixth circuit, a hydraulic circuit (condensing circuit (including the second circuit and the third circuit)), an engine cooling circuit (the left circuit in the high-temperature coolant circuit), an air conditioning circuit (the fifth circuit) and a battery circuit (the fourth circuit). The hydraulic circuit is consistent with the conventional tractor circuit and will not be described in detail here.

[0026] Based on the above circuits, a tractor thermal management control method proposed in this scheme is introduced. The method may include the following steps: S1, obtaining the current operating environment temperature, battery cooling requirements and passenger compartment cooling requirements corresponding to the tractor; The current operating environment temperature refers to the temperature of the environment in which the tractor is currently located, which can be measured based on a temperature sensor. The cooling demand refers to whether the battery needs to be cooled, and the refrigeration demand refers to whether the passenger compartment needs to be cooled. The tractor can be a hybrid tractor.

[0027] S2, controlling a refrigerant circuit and a low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; Among them, the low-temperature coolant circuit includes a first circuit formed by a heat dissipation pack, a four-way valve, a battery water pump and a power battery pack, the refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, a HAVC air-conditioning system, a cooling device and a second electromagnetic expansion valve, and a third circuit formed by a heat dissipation pack, a belt compressor, a cooling device and a second electromagnetic expansion valve.

[0028] Among them, the various circuits described in this solution can affect each other. Based on the connection or disconnection of each interface in the four-way valve, the corresponding circuit can be connected or disconnected to achieve cooling and refrigeration needs.

[0029] Specifically, the above S2 is divided into three cases: The first case: when the current operating environment temperature is within the first temperature range, the cooling demand is for cooling demand, and the refrigeration demand is for no refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, and the heat of the battery is controlled to be taken away through the battery water radiator in the heat dissipation pack to achieve cooling of the battery.

[0030] in, Figure 2The corresponding 1, 2, 3 and 4 on the four-way valve correspond to the first interface, the second interface, the third interface and the fourth interface of the four-way valve respectively. The first electromagnetic expansion valve is Figure 2 The electromagnetic expansion valve 1 shown in the figure, the second electromagnetic expansion valve is Figure 2 The electromagnetic expansion valve 2 shown in FIG.

[0031] When the first and second interfaces of the four-way valve are connected, the first circuit is connected, and the battery water pump can be controlled to work, and the heat of the battery can be controlled to be taken away by the battery water radiator in the heat dissipation pack. This control strategy can meet more than 80% of the operating conditions, reduce the work and frequency of use of the compressor, increase the life and improve fuel economy.

[0032] Optionally, the first temperature range may be set based on actual needs, for example, may be 5-20°C.

[0033] The second situation: when the current operating environment temperature is within the first temperature range, the cooling demand is a cooling demand, and the refrigeration demand is a refrigeration demand, the first interface and the third interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, the heat of the battery is controlled to be taken away through the battery water sink in the heat dissipation pack, the clutch of the belt compressor is controlled to engage, the first electromagnetic expansion valve is controlled to open, and the second electromagnetic expansion valve is controlled to close.

[0034] When the first interface and the second interface of the four-way valve are connected, it means that the first circuit is connected. At this time, the battery water pump can be controlled to work, and the heat of the battery can be controlled to be taken away through the battery water radiator in the heat dissipation pack.

[0035] When the first electromagnetic expansion valve is opened and the second electromagnetic expansion valve is closed, it means that the second circuit is connected and the refrigeration demand can be met at this time.

[0036] The third situation: when the current operating environment temperature is within the second temperature range, the cooling demand is for cooling demand, and the refrigeration demand is for no refrigeration demand, the third interface and the fourth interface of the four-way valve are controlled to be connected, the first electromagnetic expansion valve is controlled to be closed, the second electromagnetic expansion valve is controlled to be opened, and the clutch of the belt compressor is controlled to be engaged.

[0037] Optionally, the second temperature range may also be set based on actual needs, for example, it may be greater than 30°C.

[0038] Among them, when the second interface and the fourth interface of the four-way valve are connected, the second electromagnetic expansion valve is opened, and the clutch of the belt compressor is engaged, it means that the third circuit is connected. At this time, the cooling demand can be met through the heat dissipation package. When the first electromagnetic expansion valve is closed, it means that no refrigeration is required.

[0039] In the first case, if the battery temperature continues to rise and exceeds the first high temperature alarm threshold, a forced cooling strategy will be adopted, specifically: The clutch of the belt compressor is controlled to engage, the first electromagnetic expansion valve is closed, the second electromagnetic expansion valve is controlled to open, and the second interface and the fourth interface of the four-way valve are controlled to be connected, so as to cool the battery.

[0040] Among them, when the second interface and the fourth interface of the four-way valve are connected, the second electromagnetic expansion valve is opened, and the clutch of the belt compressor is engaged, it means that the third circuit is connected. At this time, the cooling demand can be met through the heat dissipation package. When the first electromagnetic expansion valve is closed, it means that no refrigeration is required.

[0041] Optionally, in the second case, if the battery temperature continues to rise and exceeds the first high temperature alarm threshold, a forced cooling strategy is adopted, specifically: The second electromagnetic expansion valve is controlled to open, and the second interface and the fourth interface of the four-way valve are controlled to be connected. At this time, the first electromagnetic expansion valve is also opened, and the clutch of the belt compressor is in the engaged state, which can make the third circuit and the first circuit conductive at the same time to meet the refrigeration and cooling needs.

[0042] Optionally, the method further comprises: When the refrigeration demand is for single refrigeration, the clutch of the belt compressor is controlled to be engaged, the first electromagnetic expansion valve is controlled to be opened, and the second electromagnetic expansion valve is controlled to be closed.

[0043] Among them, when the clutch of the belt compressor is engaged, the first electromagnetic expansion valve is opened and the second electromagnetic expansion valve is closed, the fifth circuit in the refrigerant circuit is connected to meet the refrigeration needs. Among them, the fifth circuit is a circuit formed by the heat dissipation pack, belt compressor, HAVC air-conditioning system and the first electromagnetic expansion valve.

[0044] The above processes all belong to cooling control logic. This solution also includes heating control logic: Optionally, the low-temperature coolant circuit further includes a fourth circuit formed by the four-way valve, the cooling device, the power battery pack and the battery water pump, and the method further includes: When the storage time of the whole machine is greater than the set time, the battery temperature of the battery is lower than the set threshold and needs to be recharged, and the engine of the tractor is not started or the engine cannot be started due to insufficient power, the battery is controlled to be connected to the charging pile and heated by a heating film.

[0045] Optionally, the tractor further comprises a high-temperature coolant circuit, the high-temperature coolant circuit comprises a sixth circuit formed by a water pump, a water mixer, a HAVC air conditioning system, an air conditioning water pump, a thermostat and an engine assembly, and the low-temperature coolant circuit further comprises an oil heat exchanger, a dual motor controller ( Figure 2 The seventh circuit formed by the dual motor controller two-in-one shown in ), the motor water pump, the motor radiator, the generator and the drive motor, the oil heat exchanger is connected to the motor oil heat sink circuit, and the method further includes: When the engine of the tractor is started normally and the battery has a heating demand, the second interface and the third interface of the four-way valve are controlled to be connected, the water pump is controlled to work, the air conditioning water pump is controlled to work, the air conditioning warm air core in the HAVC air conditioning system is controlled not to blow air, and the cooling water of the engine is controlled to perform heat exchange with the battery circuit liquid through the oil heat exchanger.

[0046] Among them, the battery circuit liquid refers to the liquid generated by the battery circuit. When the second interface and the third interface of the four-way valve are connected, the water pump is working, and the air-conditioning water pump is working, it means that heat exchange can be carried out between the high-temperature coolant circuit and the low-temperature coolant circuit corresponding to the engine, that is, heat exchange is carried out between the first circuit and the seventh circuit.

[0047] While controlling the cooling water of the engine to exchange heat with the battery circuit liquid through the oil heat exchanger, the water inlet temperature of the battery can also be detected. By controlling the water pump speed or the air conditioning water pump switch, the battery circuit water temperature is adjusted to be maintained between 35 and 45 to heat the battery. If there is a need for heating in the passenger compartment, it is only necessary to start the heater core and blow air.

[0048] In order to better illustrate and understand the principle of the method provided by the present invention, the scheme of the present invention is described below in conjunction with an optional specific embodiment. It should be noted that the specific implementation of each step in the specific embodiment should not be understood as a limitation to the scheme of the present invention. On the basis of the principle of the scheme provided by the present invention, other implementations that can be thought of by those skilled in the art should also be considered within the scope of protection of the present invention.

[0049] In this embodiment, the control strategies involved in this solution are divided into cooling control strategies and heating control strategies, specifically: Cooling control strategy: Working condition 1: In the spring and autumn working season, the ambient temperature is 5~20℃, the battery needs to be cooled and the passenger compartment does not need to be cooled, the four-way valves 1 and 2 are controlled to be connected, the battery water pump works, and the battery heat is taken away by the battery water; it can meet more than 80% of the working conditions, reduce the compressor work and use frequency, increase the life and improve fuel economy. If the battery temperature continues to rise and exceeds the battery level 1 high temperature alarm threshold, forced cooling is adopted, the VCU controls the belt compressor clutch to engage, the electromagnetic expansion valve 1 is closed, the electromagnetic expansion valve 2 is opened, and the four-way valves 2 and 4 are controlled to be connected to cool the battery.

[0050] Working condition 2: In the spring and autumn working season, when the ambient temperature is 5~20℃ and the battery needs to be cooled and the passenger compartment needs to be cooled, the four-way valves 1 and 2 are controlled to be connected, the battery water pump works, and the battery heat is taken away by the battery water radiator; the VCU controls the belt compressor clutch to engage, the electromagnetic expansion valve 1 opens, and the battery expansion valve 2 closes to cool the passenger compartment; if the battery temperature continues to rise and exceeds the battery's first-level high temperature alarm threshold, forced cooling is adopted, the electromagnetic expansion valve 2 is controlled to be opened, the four-way valves 2 and 4 are controlled to be connected, and the compressor jointly cools the air conditioning refrigerant and battery refrigerant circuits.

[0051] Working condition three: In high temperature season, when the VCU detects the ambient temperature is greater than 30°C (TBD, determined by the heat dissipation capacity of the heat dissipation package), the battery needs to be cooled, but the passenger compartment does not need to be cooled. The VCU controls the clutch of the belt compressor to engage, the solenoid expansion valve 1 to close, the solenoid expansion valve 2 to open, and the four-way valves 2 and 4 to connect to cool the battery.

[0052] Working condition 4: When the passenger compartment is cooled separately, the VCU controls the clutch of the belt compressor to engage, solenoid expansion valve 1 opens, and solenoid expansion valve 2 closes to cool the passenger compartment.

[0053] Heating control strategy: Working condition 1: When the whole machine has been stored for too long, the battery temperature is low and needs to be recharged, when the engine is not started or the engine cannot be started due to electricity, the battery is connected to the charging pile and heated by the heating film.

[0054] Working condition 2: When the engine starts normally and the battery needs to be heated, the VCU controls four-way valves 2 and 3 to be connected, the water pump is controlled to work, the air conditioning water pump works, the heater core does not blow air, and the engine cooling water exchanges heat with the battery circuit liquid through the oil-liquid heat exchanger. At the same time, the battery water inlet temperature needs to be detected, and the battery circuit water temperature is adjusted to maintain between 35 and 45 by controlling the water pump speed or the air conditioning water pump switch to heat the battery. If the passenger compartment needs to be heated, just start the heater core and blow air.

[0055] Compared with the prior art, the solution of the present invention has the following beneficial effects: 1. The generator and drive motor are lubricated and cooled by hydraulic oil, and the heat exchange between hydraulic oil and coolant is realized through the oil heat exchanger; the motor water pump circulates the coolant to cool the two-in-one controller and then cools the oil heat exchanger, and the heat is taken away by the motor radiator.

[0056] 2. The warm air circuit in the HVAC is heated by the engine's waste heat, and the cold air circuit is cooled by the engine through a belt-driven compressor. The belt compressor is controlled on and off by an electromagnetic clutch. The air-conditioning evaporator is connected in parallel with the Chiller in the battery circuit, and both are controlled on and off by two electromagnetic expansion valves.

[0057] 3. The battery can be cooled in two ways: a belt compressor circuit for high temperature environments in summer and a battery water cooling circuit for peak operating seasons in spring and autumn. There are two forms of heating: engine water heating and heating by a heating film arranged inside the battery.

[0058] 4. At present, the application time of tractors is mainly concentrated in spring and autumn, and the temperature is generally between 5℃ and 15℃. The water heat sink temperature of this solution can meet the heat dissipation requirements of the battery. Under the working conditions of spring and autumn, the fuel economy of the whole machine can be improved while ensuring the operation.

[0059] Based on Figure 1 Based on the same principle as the method shown in , the embodiment of the present invention also provides a tractor thermal management control system 20, such as Figure 3 As shown in , the tractor thermal management control system 20 may include an acquisition module 210 and a cooling module 220, wherein: An acquisition module 210 is used to acquire the current operating environment temperature, the cooling requirement of the battery and the cooling requirement of the passenger compartment corresponding to the tractor; A cooling module 220, for controlling a refrigerant circuit and a low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand, so as to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; Among them, the low-temperature coolant circuit includes a first circuit formed by the heat dissipation pack, the four-way valve, the battery water pump and the power battery pack connected in sequence; the refrigerant circuit includes a second circuit formed by the first electromagnetic expansion valve, the HAVC air-conditioning system, the cooling device and the second electromagnetic expansion valve; and a third circuit formed by the heat dissipation pack, the belt compressor, the cooling device and the second electromagnetic expansion valve.

[0060] Optionally, the cooling module 220 is specifically used for: When the current operating environment temperature is within the first temperature range, the cooling demand is cooling demand, and the refrigeration demand is no refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, and the heat of the battery is controlled to be taken away by the battery water radiator in the heat dissipation pack; When the current operating environment temperature is within the first temperature range, the cooling demand is that there is a cooling demand, and the refrigeration demand is that there is a refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, the heat of the battery is controlled to be taken away by the battery water radiator in the heat dissipation pack, the clutch of the belt compressor is controlled to be engaged, the first electromagnetic expansion valve is controlled to be opened, and the second electromagnetic expansion valve is controlled to be closed; When the current operating environment temperature is within the second temperature range, the cooling demand is for cooling demand, and the refrigeration demand is for no refrigeration demand, the third interface and the fourth interface of the four-way valve are controlled to be connected, the first electromagnetic expansion valve is controlled to be closed, the second electromagnetic expansion valve is controlled to be opened, and the clutch of the belt compressor is controlled to be engaged.

[0061] Optionally, when the current operating environment temperature is within the first temperature range, the cooling requirement is cooling requirement, the refrigeration requirement is no refrigeration requirement, and the battery temperature of the battery is greater than a first high temperature alarm threshold, the system further includes: The first forced cooling module is used to control the clutch of the belt compressor to engage, close the first electromagnetic expansion valve, control the second electromagnetic expansion valve to open, and control the second interface and the fourth interface of the four-way valve to be connected, so as to cool the battery.

[0062] Optionally, when the current operating environment temperature is within the first temperature range, the cooling requirement is that there is a cooling requirement, the refrigeration requirement is that there is a refrigeration requirement, and the battery temperature of the battery is greater than a first high temperature alarm threshold, the system further includes: The second forced cooling module is used to control the second electromagnetic expansion valve to open, and control the second interface and the fourth interface of the four-way valve to be connected.

[0063] Optionally, the system further comprises: The separate cooling module is used to control the clutch of the belt compressor to engage, control the first electromagnetic expansion valve to open, and control the second electromagnetic expansion valve to close when the cooling demand is separate cooling.

[0064] Optionally, the low-temperature coolant circuit further includes a fourth circuit formed by the four-way valve, the cooling device, the power battery pack and the battery water pump, and the system further includes: The heating module is used to control the battery to be connected to the charging pile and heated by the heating film when the storage time of the whole machine is greater than the set time, the battery temperature of the battery is lower than the set threshold and needs to be recharged, and the engine of the tractor is not started or the engine cannot be started due to insufficient power.

[0065] A tractor thermal management control device according to an embodiment of the present invention can execute a tractor thermal management control method provided by an embodiment of the present invention, and the implementation principle is similar. The actions executed by each module and unit in a tractor thermal management control device according to each embodiment of the present invention correspond to the steps in a tractor thermal management control method according to each embodiment of the present invention. For the detailed functional description of each module of a tractor thermal management control device, please refer to the description in the corresponding tractor thermal management control method shown in the previous text, which will not be repeated here.

[0066] Among them, the above-mentioned tractor thermal management control device can be a computer program (including program code) running in a computer device. For example, the tractor thermal management control device is an application software; the device can be used to execute the corresponding steps in the method provided in the embodiment of the present invention.

[0067] In some embodiments, a tractor thermal management control device provided by an embodiment of the present invention may be implemented in a combination of software and hardware. As an example, a tractor thermal management control device provided by an embodiment of the present invention may be a processor in the form of a hardware decoding processor, which is programmed to execute a tractor thermal management control method provided by an embodiment of the present invention. For example, the processor in the form of a hardware decoding processor may be one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field programmable gate arrays (FPGAs), or other electronic components.

[0068] In other embodiments, the tractor thermal management control device provided by the embodiment of the present invention can be implemented in a software manner. Figure 3 A tractor thermal management control device stored in a memory is shown, which may be software in the form of a program and a plug-in, and includes a series of modules, including an acquisition module 210 and a cooling module 220, for implementing a tractor thermal management control method provided by an embodiment of the present invention.

[0069] The modules involved in the embodiments of the present invention may be implemented by software or hardware, wherein the name of a module does not limit the module itself in some cases.

[0070] Based on the same principle as the method shown in the embodiments of the present invention, an electronic device is also provided in the embodiments of the present invention, which may include but is not limited to: a processor and a memory; the memory is used to store a computer program; the processor is used to execute the method shown in any embodiment of the present invention by calling the computer program.

[0071] In an alternative embodiment, an electronic device is provided, such as Figure 4 As shown, Figure 4 The electronic device 4000 shown includes: a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, such as through a bus 4002. Optionally, the electronic device 4000 may also include a transceiver 4004, which may be used for data interaction between the electronic device and other electronic devices, such as data transmission and / or data reception. It should be noted that in actual applications, the transceiver 4004 is not limited to one, and the structure of the electronic device 4000 does not constitute a limitation on the embodiments of the present invention.

[0072] Processor 4001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. Processor 4001 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0073] The bus 4002 may include a path to transmit information between the above components. The bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 4002 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0074] The memory 4003 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.

[0075] The memory 4003 is used to store application code (computer program) for executing the solution of the present invention, and the execution is controlled by the processor 4001. The processor 4001 is used to execute the application code stored in the memory 4003 to implement the content shown in the above method embodiment.

[0076] The electronic device may also be a terminal device. Figure 4 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0077] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer-readable storage medium is run on a computer, the computer can execute the corresponding contents of the aforementioned method embodiment.

[0078] According to another aspect of the present invention, a computer program product or a computer program is also provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the methods provided in the implementation modes of the above-mentioned various embodiments.

[0079] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0080] It should be understood that the flow charts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the module, the program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a sequence different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0081] The computer-readable storage medium provided by the embodiment of the present invention may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0082] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device executes the method shown in the above embodiment.

[0083] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A tractor thermal management control method, characterized in that: include: Obtain the current operating environment temperature, battery cooling requirements, and passenger compartment cooling requirements corresponding to the tractor; According to the current operating environment temperature, cooling demand and refrigeration demand, controlling the refrigerant circuit and the low-temperature coolant circuit to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; The low-temperature coolant circuit includes a first circuit formed by a heat dissipation package, a four-way valve, a battery water pump and a power battery pack; the refrigerant circuit includes a second circuit formed by a first electromagnetic expansion valve, a HAVC air conditioning system, a cooling device and a second electromagnetic expansion valve; and a third circuit formed by a heat dissipation package, a belt compressor, a cooling device and a second electromagnetic expansion valve. The tractor further includes a high-temperature coolant circuit, the high-temperature coolant circuit includes a sixth circuit formed by a water pump, a water mixer, a HAVC air conditioning system, an air conditioning water pump, a thermostat and an engine assembly, the low-temperature coolant circuit also includes a seventh circuit formed by an oil heat exchanger, a dual motor controller, a motor water pump, a motor radiator, a generator and a drive motor, the oil heat exchanger is connected to the motor oil radiator circuit, and the method further includes: When the engine of the tractor is started normally and the battery has a heating demand, the second interface and the third interface of the four-way valve are controlled to be connected, the water pump is controlled to work, the air conditioning water pump is controlled to work, the air conditioning warm air core in the HAVC air conditioning system is controlled not to blow air, and the cooling water of the engine is controlled to perform heat exchange with the battery circuit liquid through the oil heat exchanger.

2. The method according to claim 1, characterized in that The controlling of the refrigerant circuit and the low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand includes: When the current operating environment temperature is within the first temperature range, the cooling demand is cooling demand, and the refrigeration demand is no refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, and the heat of the battery is controlled to be taken away by the battery water radiator in the heat dissipation pack; When the current operating environment temperature is within the first temperature range, the cooling demand is that there is a cooling demand, and the refrigeration demand is that there is a refrigeration demand, the first interface and the second interface of the four-way valve are controlled to be connected, the battery water pump is controlled to work, the heat of the battery is controlled to be taken away by the battery water radiator in the heat dissipation pack, the clutch of the belt compressor is controlled to be engaged, the first electromagnetic expansion valve is controlled to be opened, and the second electromagnetic expansion valve is controlled to be closed; When the current operating environment temperature is within the second temperature range, the cooling demand is for cooling demand, and the refrigeration demand is for no refrigeration demand, the second interface and the fourth interface of the four-way valve are controlled to be connected, the first electromagnetic expansion valve is controlled to be closed, the second electromagnetic expansion valve is controlled to be opened, and the clutch of the belt compressor is controlled to be engaged.

3. The method according to claim 1, characterized in that When the current operating environment temperature is within the first temperature range, the cooling requirement is a cooling requirement, the refrigeration requirement is a no refrigeration requirement, and the battery temperature of the battery is greater than a first high temperature alarm threshold, the method further includes: The clutch of the belt compressor is controlled to engage, the first electromagnetic expansion valve is closed, the second electromagnetic expansion valve is controlled to open, and the second interface and the fourth interface of the four-way valve are controlled to be connected, so as to cool the battery.

4. The method according to claim 1, characterized in that: When the current operating environment temperature is within the first temperature range, the cooling requirement is that there is a cooling requirement, the refrigeration requirement is that there is a refrigeration requirement, and the battery temperature of the battery is greater than a first high temperature alarm threshold, the method further includes: The second electromagnetic expansion valve is controlled to open, and the second interface and the fourth interface of the four-way valve are controlled to be connected.

5. The method according to claim 1, characterized in that The method further comprises: When the refrigeration demand is for single refrigeration, the clutch of the belt compressor is controlled to be engaged, the first electromagnetic expansion valve is controlled to be opened, and the second electromagnetic expansion valve is controlled to be closed.

6. The method according to claim 1, characterized in that The low-temperature coolant circuit also includes a fourth circuit formed by the four-way valve, the cooling device, the power battery pack and the battery water pump, and the method further includes: When the storage time of the whole machine is greater than the set time, the battery temperature of the battery is lower than the set threshold and needs to be recharged, and the engine of the tractor is not started or the engine cannot be started due to insufficient power, the battery is controlled to be connected to the charging pile and heated by a heating film.

7. A tractor thermal management control system, characterized in that: The tractor thermal management control method according to claim 1 is adopted, and the system comprises: An acquisition module, used to acquire the current operating environment temperature corresponding to the tractor, the cooling requirement of the battery and the cooling requirement of the passenger compartment; A cooling module, used to control a refrigerant circuit and a low-temperature coolant circuit according to the current operating environment temperature, cooling demand and refrigeration demand, so as to meet the cooling demand of the battery and the refrigeration demand of the passenger compartment; Among them, the low-temperature coolant circuit includes a first circuit formed by the heat dissipation pack, the four-way valve, the battery water pump and the power battery pack connected in sequence; the refrigerant circuit includes a second circuit formed by the first electromagnetic expansion valve, the HAVC air-conditioning system, the cooling device and the second electromagnetic expansion valve; and a third circuit formed by the heat dissipation pack, the belt compressor, the cooling device and the second electromagnetic expansion valve.

8. An electronic device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

10. A tractor, characterized in that: Comprising the electronic device as claimed in claim 8.

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