Integrated refrigerating system and method

Abstract

The invention discloses an integrated refrigeration system and method, and relates to the field of refrigeration, the integrated refrigeration system is internally provided with an evaporator, an electric compressor, a condenser assembly, a cab refrigerant stop valve, an air conditioner thermostatic expansion valve, a battery pack refrigerant stop valve, a battery thermostatic expansion valve, a battery cooler, a battery loop electronic water pump and a battery pack module, the evaporator, the electric compressor, the condenser assembly, the cab refrigerant stop valve and the air conditioner thermostatic expansion valve have the air conditioner refrigeration function, and the electric compressor, the condenser assembly, the battery pack refrigerant stop valve, the battery thermostatic expansion valve, the battery cooler, the battery loop electronic water pump and the battery pack module have the battery refrigeration function. Due to the fact that only one electric compressor and one condenser assembly are arranged in the scheme, the functions of air conditioner refrigeration and battery refrigeration are achieved at the same time, the cost, the size and the generated noise of a refrigeration system of a pure electric truck are greatly reduced, and elements in the refrigeration system are easier to arrange.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration, and in particular to an integrated refrigeration system and method. Background Art

[0002] With the development of science and technology, the refrigeration system of pure electric trucks is gradually updated. At present, the cooling system on the pure electric truck includes the cooling system of the cab and the cooling system of the battery, and the cooling system of the cab and the cooling system of the battery are separate independent systems. Each cooling system has a corresponding compressor, a set of condenser assembly and several refrigerant aluminum tubes, etc. Because the compressor and the condenser assembly will generate high noise in actual work, the cooling system on the existing pure electric truck has the problem of high noise in actual work, and because the cooling system of the cab and the cooling system of the battery are separate independent systems, the components inside the two systems are similar, and the compressor and condenser assembly are large in size and cost, so the refrigeration system of the pure electric truck will be more expensive and larger in size, and because there are too many components inside the two systems, it will also cause difficulties in the layout of the entire vehicle. Summary of the invention

[0003] The object of the present invention is to provide an integrated refrigeration system and method. This solution only provides an electric compressor and a condenser assembly to simultaneously realize the functions of air conditioning refrigeration and battery refrigeration, greatly reducing the cost and volume of the refrigeration system of the pure electric truck, and making it easier to arrange the components in the cooling system.

[0004] In order to solve the above technical problems, the present invention provides an integrated refrigeration system, including: an evaporator, an electric compressor, a condenser assembly, a cab refrigerant shut-off valve, an air conditioning thermal expansion valve, a battery pack refrigerant shut-off valve, a battery thermal expansion valve, a battery cooler, a battery circuit electronic water pump, and a battery pack module, wherein the battery pack module includes a plurality of battery packs;

[0005] The evaporator is used to convert the first low-temperature and low-pressure liquid refrigerant into the first low-temperature and low-pressure gaseous refrigerant when the electric compressor is turned on and transmit it to the electric compressor, so that the electric compressor converts the first low-temperature and low-pressure gaseous refrigerant into the high-temperature and high-pressure gaseous refrigerant;

[0006] The condenser assembly is used to convert the high-temperature and high-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant and transmit it to the cab refrigerant stop valve and the battery pack refrigerant stop valve;

[0007] The air conditioning thermal expansion valve is used to convert the high-temperature and high-pressure liquid refrigerant into a second low-temperature and low-pressure liquid refrigerant when the cab refrigerant shut-off valve is opened, and transmit the second low-temperature and low-pressure liquid refrigerant to the evaporator;

[0008] The battery thermal expansion valve is used to convert the high-temperature and high-pressure liquid refrigerant into a third low-temperature and low-pressure liquid refrigerant when the battery pack refrigerant shut-off valve is opened, and transmit the third low-temperature and low-pressure liquid refrigerant to the battery cooler;

[0009] The battery cooler is used to absorb the heat of the battery pack cooling circulating water, and transmit the second low-temperature and low-pressure gaseous refrigerant converted from the third low-temperature and low-pressure liquid refrigerant to the electric compressor, and pump the cooled battery pack cooling circulating water into the battery pack module of the vehicle through the battery circuit electronic water pump, and receive the battery pack cooling circulating water after absorbing the heat.

[0010] Optionally, it also includes: a first three-state switch, a second three-state switch, and an electric compressor controller;

[0011] The first three-state switch is used to collect the first refrigerant pressure value at the front end of the inlet of the cab refrigerant cut-off valve;

[0012] The second three-state switch is used to collect the second refrigerant pressure value at the front end of the inlet of the battery pack refrigerant cut-off valve;

[0013] The electric compressor controller is used to control the electric compressor to be turned off when the first refrigerant pressure value is not within a first preset pressure range, and to control the electric compressor to be turned off when the second refrigerant pressure value is not within a second preset pressure range.

[0014] Optionally, also include:

[0015] The liquid storage dryer is used to sequentially dry and filter the high-temperature and high-pressure liquid refrigerant after receiving the high-temperature and high-pressure liquid refrigerant transmitted by the condenser assembly, and transmit the dried and filtered high-temperature and high-pressure liquid refrigerant to the cab refrigerant shut-off valve and the battery pack refrigerant shut-off valve.

[0016] Optionally, it also includes: an electric drive circuit electronic water pump, a gearbox water bag, a motor controller water bag corresponding to a number of motor controllers, a motor water bag corresponding to a number of motors, and a high-voltage auxiliary drive integrated controller water bag corresponding to the high-voltage auxiliary drive integrated controller module;

[0017] The electric drive circuit electronic water pump is used to pump the electric drive cooling circulating water into each of the motor controller water bags, the gearbox water bag, each of the motor water bags and the high-voltage auxiliary drive integrated controller water bag in sequence.

[0018] Optionally, also include:

[0019] The low-temperature heat dissipation module is used to cool the electric drive cooling circulating water flowing out of each of the motor controller water bags, the gearbox water bag, each of the motor water bags and the high-voltage auxiliary drive integrated controller water bag, and transmit the cooled electric drive cooling circulating water to the electric drive circuit electronic water pump.

[0020] In order to solve the above technical problems, the present invention further provides an integrated refrigeration method, which is applied to the integrated refrigeration system as described above, and the method comprises:

[0021] Get the current state of the vehicle's key switch and the current temperature of the evaporator;

[0022] Determine whether the user's air conditioning and refrigeration demand and the speed requirement of the electric compressor are received;

[0023] If the user's air conditioning and cooling demand and the speed requirement of the electric compressor are received, the opening or closing of the cab refrigerant shut-off valve is controlled according to the current state and the current temperature of the evaporator;

[0024] Get the maximum temperature of each battery cell in the battery pack module;

[0025] Determining whether a battery cooling demand of the user is received;

[0026] If the user's battery cooling demand is received, the battery pack refrigerant shut-off valve is controlled to be opened or closed according to the current state, the current temperature of the evaporator and the maximum value of the battery core temperature.

[0027] Optionally, after receiving the air conditioning and refrigeration demand of the user and the speed requirement of the electric compressor, the method further includes:

[0028] Obtain the current maximum temperature value of each motor controller in the motor controller module, the current maximum temperature value of each motor in the motor group module, the current temperature of the steering oil pump of the vehicle, the current temperature of the air pump of the vehicle, and the current temperature of the DC power supply module of the vehicle;

[0029] Adjusting a first duty cycle setting value of a cooling fan corresponding to the motor controller module according to a current maximum temperature value of each motor controller in the motor controller module;

[0030] Adjusting a second duty cycle setting value of a cooling fan corresponding to the motor group module according to the current maximum temperature value of each motor in the motor group module;

[0031] adjusting a third duty cycle setting value of a cooling fan corresponding to the steering oil pump of the vehicle according to a current temperature of the steering oil pump of the vehicle;

[0032] adjusting a fourth duty cycle setting value of a cooling fan corresponding to the air pump of the vehicle according to a current temperature of the air pump of the vehicle;

[0033] adjusting a fifth duty cycle setting value of a cooling fan corresponding to the DC power module according to a current temperature of the DC power module of the vehicle;

[0034] A sixth duty cycle setting value of a cooling fan corresponding to the electric compressor is adjusted based on the speed requirement.

[0035] Optionally, after adjusting the sixth duty cycle setting value of the cooling fan corresponding to the electric compressor based on the speed requirement, the method further includes:

[0036] determining a current operating mode of the vehicle;

[0037] Determining whether the current operating mode is a hybrid mode or an electric mode;

[0038] If the current working mode is the hybrid mode, adjusting the value of each setting value in the first set of setting values ​​to be consistent with the highest value in the first set of setting values;

[0039] If the current working mode is the electric mode, adjusting the value of each set value in the second set of set values ​​to be consistent with the highest value in the second set of set values;

[0040] Among them, the first group of setting values ​​includes: the first duty cycle setting value, the second duty cycle setting value, the third duty cycle setting value, the fourth duty cycle setting value and the fifth duty cycle setting value; the second group of setting values ​​includes: the first duty cycle setting value, the second duty cycle setting value, the third duty cycle setting value, the fourth duty cycle setting value, the fifth duty cycle setting value and the sixth duty cycle setting value.

[0041] Optionally, after obtaining the current state of the key switch of the vehicle and the current temperature of the evaporator, the method further includes:

[0042] Obtaining the current temperature of the motor controller module, the current temperature of the motor group module, the current temperature of the steering oil pump of the vehicle, the current temperature of the air pump controller of the vehicle, the current temperature of the DC power supply module of the vehicle, the current speed of the vehicle, the current current value of the steering oil pump, and the current current value of the air pump of the vehicle;

[0043] Determine the target duty cycle of the electronic water pump of the electric drive circuit based on the current state of the key switch, the current temperature of the motor controller module, the current temperature of the motor group module, the current temperature of the steering oil pump of the vehicle, the current temperature of the air pump controller of the vehicle, the current temperature of the DC power supply module of the vehicle, the current speed of the vehicle, the current current value of the steering oil pump, and the current current value of the air pump of the vehicle;

[0044] The current duty cycle of the electric drive circuit electronic water pump is controlled to be adjusted to the target duty cycle of the electric drive circuit electronic water pump.

[0045] Optionally, also include:

[0046] determining a current operating mode of the vehicle;

[0047] Get the current working mode of the battery circuit electronic water pump;

[0048] Determining a target duty cycle of the battery circuit electronic water pump according to a current operating mode of the vehicle and a current operating mode of the battery circuit electronic water pump;

[0049] The current duty cycle of the battery circuit electronic water pump is controlled to be adjusted to a target duty cycle of the battery circuit electronic water pump.

[0050] Optionally, after controlling the opening or closing of the cab refrigerant cut-off valve according to the current state and the current temperature of the evaporator, the method further includes:

[0051] If the cab refrigerant shut-off valve is open, the current required speed of the electric compressor and the current water inlet temperature of the battery module are obtained;

[0052] Determining a target speed of the electric compressor according to the current required speed and the current water inlet temperature;

[0053] The current rotation speed of the electric compressor is controlled to be adjusted to a target rotation speed of the electric compressor.

[0054] The object of the present invention is to provide an integrated refrigeration system and method, in which an evaporator, an electric compressor, a condenser assembly, a cab refrigerant shut-off valve, an air-conditioning thermal expansion valve, a battery pack refrigerant shut-off valve, a battery thermal expansion valve, a battery cooler, a battery circuit electronic water pump, and a battery pack module are provided in the integrated refrigeration system, wherein the evaporator, the electric compressor, the condenser assembly, the cab refrigerant shut-off valve, and the air-conditioning thermal expansion valve perform the air-conditioning refrigeration function, while the electric compressor, the condenser assembly, the battery pack refrigerant shut-off valve, the battery thermal expansion valve, the battery cooler, the battery circuit electronic water pump, and the battery pack module perform the battery refrigeration function. Because the present solution only provides one electric compressor and one condenser assembly to simultaneously realize the functions of air-conditioning refrigeration and battery refrigeration, the cost, volume, and noise generated by the refrigeration system of a pure electric truck are greatly reduced, and it is easier to arrange the components in the cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0056] Figure 1 A schematic structural diagram of an integrated refrigeration system provided by the present invention;

[0057] Figure 2 A schematic structural diagram of another integrated refrigeration system provided by the present invention;

[0058] Figure 3 A process flow chart of an integrated refrigeration method provided by the present invention. DETAILED DESCRIPTION

[0059] The core of the present invention is to provide an integrated refrigeration system and method. This solution only has one electric compressor and one condenser assembly to simultaneously realize the functions of air conditioning refrigeration and battery refrigeration, thereby greatly reducing the cost, volume and noise generated by the refrigeration system of the pure electric truck, and making it easier to arrange the components in the cooling system.

[0060] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of an integrated refrigeration system provided by the present invention. The integrated refrigeration system includes: an evaporator 1, an electric compressor 2, a condenser assembly 3, a cab refrigerant shut-off valve 4, an air conditioning thermal expansion valve 5, a battery pack refrigerant shut-off valve 6, a battery thermal expansion valve 7, a battery cooler 8, a battery circuit electronic water pump 9, and a battery pack module 10, wherein the battery pack module 10 includes a plurality of battery packs;

[0062] The evaporator 1 is used to convert the first low-temperature and low-pressure liquid refrigerant into the first low-temperature and low-pressure gaseous refrigerant when the electric compressor 2 is turned on, and transmit the first low-temperature and low-pressure gaseous refrigerant to the electric compressor 2, so that the electric compressor 2 converts the first low-temperature and low-pressure gaseous refrigerant into the high-temperature and high-pressure gaseous refrigerant;

[0063] The condenser assembly 3 is used to convert the high-temperature and high-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant and transmit it to the cab refrigerant stop valve 4 and the battery pack refrigerant stop valve 6;

[0064] The air conditioning thermal expansion valve 5 is used to convert the high-temperature and high-pressure liquid refrigerant into a second low-temperature and low-pressure liquid refrigerant when the cab refrigerant stop valve 4 is opened, and transmit the second low-temperature and low-pressure liquid refrigerant to the evaporator 1;

[0065] The battery thermal expansion valve 7 is used to convert the high-temperature and high-pressure liquid refrigerant into a third low-temperature and low-pressure liquid refrigerant when the battery pack refrigerant stop valve 6 is opened, and transmit the third low-temperature and low-pressure liquid refrigerant to the battery cooler 8;

[0066] The battery cooler 8 is used to absorb the heat of the battery pack cooling circulating water, and transmit the second low-temperature and low-pressure gaseous refrigerant converted from the third low-temperature and low-pressure liquid refrigerant to the electric compressor 2, and pump the cooled battery pack cooling circulating water into the battery pack module 10 of the vehicle through the battery circuit electronic water pump 9, and receive the battery pack cooling circulating water after absorbing the heat.

[0067] The present invention takes into account that the existing refrigeration system inside the truck includes an air conditioning refrigeration system and a battery refrigeration system, and the air conditioning refrigeration system and the battery refrigeration system each have a corresponding compressor, a set of condenser assembly 3 and a number of refrigerant aluminum tubes, etc., so the cost of the existing refrigeration system is too high, the volume is too large, and the layout is more troublesome. Therefore, this scheme integrates the air conditioning refrigeration system and the battery refrigeration system, and the air conditioning refrigeration function is performed by the evaporator 1, the electric compressor 2, the condenser assembly 3, the cab refrigerant shut-off valve 4, and the air conditioning thermal expansion valve 5, while the electric compressor 2, the condenser assembly 3, the battery pack refrigerant shut-off valve 6, the battery thermal expansion valve 7, the battery cooler 8, the battery circuit electronic water pump 9, and the battery pack module 10 perform the battery refrigeration function, wherein the electric compressor 2 and the condenser assembly 3 are devices shared by the two refrigeration functions, so a compressor and a condenser assembly 3 are saved, that is, by only setting an electric compressor 2 and a condenser assembly 3, the functions of air conditioning refrigeration and battery refrigeration are simultaneously realized, so the cost, volume and noise generated by the refrigeration system of the pure electric truck are greatly reduced, and it is easier to arrange the components in the cooling system.

[0068] It should be noted that the first low-temperature and low-pressure liquid refrigerant, the second low-temperature and low-pressure liquid refrigerant, and the third low-temperature and low-pressure liquid refrigerant are all liquid refrigerants that meet the preset first low-temperature and low-pressure condition; the first low-temperature and low-pressure gaseous refrigerant and the second low-temperature and low-pressure gaseous refrigerant are all gaseous refrigerants that meet the preset second low-temperature and low-pressure condition. Similarly, the high-temperature and high-pressure gaseous refrigerant is a gaseous refrigerant that meets the first high-temperature and high-pressure condition, and the high-temperature and high-pressure liquid refrigerant is a liquid refrigerant that meets the second high-temperature and high-pressure condition.

[0069] The present embodiment provides an integrated refrigeration system, in which an evaporator 1, an electric compressor 2, a condenser assembly 3, a cab refrigerant shut-off valve 4, an air-conditioning thermal expansion valve 5, a battery pack refrigerant shut-off valve 6, a battery thermal expansion valve 7, a battery cooler 8, a battery circuit electronic water pump 9, and a battery pack module 10 are provided. The evaporator 1, the electric compressor 2, the condenser assembly 3, the cab refrigerant shut-off valve 4, and the air-conditioning thermal expansion valve 5 perform the air-conditioning refrigeration function, while the electric compressor 2, the condenser assembly 3, the battery pack refrigerant shut-off valve 6, the battery thermal expansion valve 7, the battery cooler 8, the battery circuit electronic water pump 9, and the battery pack module 10 perform the battery refrigeration function. Because the present solution only provides one electric compressor 2 and one condenser assembly 3 to simultaneously realize the functions of air-conditioning refrigeration and battery refrigeration, the cost, volume, and noise generated by the refrigeration system of the pure electric truck are greatly reduced, and it is easier to arrange the components in the cooling system.

[0070] Based on the above embodiments:

[0071] As an optional embodiment, it further includes: a first three-state switch, a second three-state switch, and an electric compressor controller;

[0072] The first three-state switch is used to collect the first refrigerant pressure value at the front end of the inlet of the cab refrigerant stop valve 4;

[0073] The second three-state switch is used to collect the second refrigerant pressure value at the front end of the inlet of the battery pack refrigerant stop valve 6;

[0074] The electric compressor controller is used to control the electric compressor to shut down when the first refrigerant pressure value is not within the first preset pressure range, and to control the electric compressor to shut down when the second refrigerant pressure value is not within the second preset pressure range.

[0075] In the present invention, it is considered that when actually performing air conditioning refrigeration and battery refrigeration, the pressure value at the front end of the inlet of the cab refrigerant shut-off valve 4 and the pressure value at the front end of the inlet of the battery pack refrigerant shut-off valve 6 are related to the safety of the whole vehicle control. For example, when the pressure value at the front end of the inlet of the cab refrigerant shut-off valve 4 and the pressure value at the front end of the inlet of the battery pack refrigerant shut-off valve 6 are too large or too small, it means that there is a fault in the refrigeration circuit. At this time, if refrigeration continues, it is easy to damage the electric compressor 2 (air conditioning compressor). Therefore, this scheme adds a first three-state switch, a second three-state switch, and an electric compressor controller, and collects the first refrigerant pressure value at the front end of the inlet of the cab refrigerant shut-off valve 4 through the first three-state switch, and collects the second refrigerant pressure value at the front end of the inlet of the battery pack refrigerant shut-off valve 6 through the second three-state switch. The electric compressor controller will control the electric compressor to shut down when the first refrigerant pressure value is not within the first preset pressure range, and control the electric compressor to shut down when the second refrigerant pressure value is not within the second preset pressure range, so that the user or operator can detect and repair the fault in time to ensure the safety of the vehicle.

[0076] It should be noted that in actual applications, because the proportions of refrigerants required for each refrigeration are different when the vehicle is performing air conditioning refrigeration and battery refrigeration, the present solution can also control the content and proportion of high-temperature and high-pressure liquid refrigerant transmitted to the cab refrigerant shut-off valve 4 or the battery pack refrigerant shut-off valve 6 by controlling the opening time of the cab refrigerant shut-off valve 4 and the battery pack refrigerant shut-off valve 6. In addition, by controlling the opening and closing of the cab refrigerant shut-off valve 4 and the battery pack refrigerant shut-off valve 6, the transmission position of the high-temperature and high-pressure liquid refrigerant can also be changed according to the user's actual cooling needs, that is, whether to perform air conditioning refrigeration and / or battery refrigeration, to facilitate the user's actual application.

[0077] It should also be noted that in actual applications, an electric compressor controller can be added or not. For example, the control functions of the internal components of the entire integrated refrigeration system are all implemented by the vehicle's VCU (Vehicle Control Unit), and there is no need to set up extra control components to maximize cost savings and the volume inside the vehicle. In addition, when there are too many internal components in the integrated refrigeration system, that is, when the integrated refrigeration system wants to achieve too many functions, in order to reduce the calculation amount of the VCU and improve the working efficiency of the integrated refrigeration system, different controllers can also be added for individual functions.

[0078] As an optional embodiment, it also includes:

[0079] The liquid storage dryer is used to dry and filter the high-temperature and high-pressure liquid refrigerant in sequence after receiving the high-temperature and high-pressure liquid refrigerant transmitted by the condenser assembly 3, and transmit the dried and filtered high-temperature and high-pressure liquid refrigerant to the cab refrigerant shut-off valve 4 and the battery pack refrigerant shut-off valve 6.

[0080] In the present invention, considering that some impurities and excess moisture may exist in the high-temperature and high-pressure liquid refrigerant output through the condenser assembly 3, a liquid storage dryer is provided in this scheme, and the high-temperature and high-pressure liquid refrigerant is dried and filtered in turn by the liquid storage dryer, and the high-temperature and high-pressure liquid refrigerant after drying and filtering is transmitted to the cab refrigerant shut-off valve 4 and the battery pack refrigerant shut-off valve 6, which greatly improves the accuracy of the scheme.

[0081] As an optional embodiment, it also includes: an electric drive circuit electronic water pump, a gearbox water bag, a motor controller water bag corresponding to a plurality of motor controllers, a motor water bag corresponding to a plurality of motors, and a high-voltage auxiliary drive integrated controller water bag corresponding to the high-voltage auxiliary drive integrated controller module;

[0082] The electric drive circuit electronic water pump is used to pump the electric drive cooling circulating water into each motor controller water bag, gearbox water bag, each motor water bag and high-voltage auxiliary drive integrated controller water bag in sequence.

[0083] In the present invention, in addition to considering that the temperature of the vehicle's battery pack will affect the normal operation of the vehicle, it is also considered that the temperature of the electric drive circuit (motor controller, gearbox, motor, high-voltage auxiliary drive integrated controller module) will also affect the normal operation of the vehicle. Therefore, this solution adds an electric drive circuit electronic water pump, a gearbox water bag, motor controller water bags corresponding to several motor controllers, motor water bags corresponding to several motors, and a high-voltage auxiliary drive integrated controller water bag corresponding to the high-voltage auxiliary drive integrated controller module in the electric drive circuit, and the electric drive cooling circulating water is pumped into each motor controller water bag, the gearbox water bag, each motor water bag and the high-voltage auxiliary drive integrated controller water bag in turn through the electric drive circuit electronic water pump to reduce the temperature of each motor controller, the gearbox, each motor and the high-voltage auxiliary drive integrated controller module, thereby improving the working efficiency of the vehicle.

[0084] It should be noted that the high-voltage auxiliary drive integrated controller module includes: the vehicle's steering oil pump, air pump controller, DC power supply module, etc.

[0085] As an optional embodiment, it also includes:

[0086] The low-temperature heat dissipation module is used to cool the electric drive cooling circulating water flowing out of the motor controller water bag, the gearbox water bag, the motor water bag and the high-voltage auxiliary drive integrated controller water bag, and transmit the cooled electric drive cooling circulating water to the electric drive circuit electronic water pump.

[0087] In the present invention, it is considered that after the electric drive cooling circulating water is pumped into the water bags of each motor controller, the gearbox water bag, each motor water bag and the high-voltage auxiliary drive integrated controller water bag by the electric drive circuit electronic water pump, although it can absorb the heat of each motor controller, the gearbox, each motor and the high-voltage auxiliary drive integrated controller module, the temperature of the cooling circulating water itself will become high. If it is not treated, it will affect the subsequent cooling process. Therefore, this scheme adds a low-temperature heat dissipation module for cooling the electric drive cooling circulating water flowing out of the water bags of each motor controller, the gearbox water bag, each motor water bag and the high-voltage auxiliary drive integrated controller water bag, and transmits the cooled electric drive cooling circulating water to the electric drive circuit electronic water pump to improve the cooling efficiency of the electric drive circuit.

[0088] It should be noted that the working principle of the integrated refrigeration system provided by this solution is as follows Figure 2As shown, the refrigerant system of the cab air conditioner and the battery pack refrigerant system share an electric compressor 2 and a condenser assembly 3. When the electric compressor 2 is running, the low-temperature and low-pressure gaseous refrigerant generated in the evaporator 1 is sucked in and compressed, and then discharged at a high temperature and high pressure. The high-temperature and high-pressure gaseous refrigerant enters the condenser assembly 3. After being cooled by the fan or the headwind, the refrigerant changes from the high-temperature and high-pressure gaseous state to the high-temperature and high-pressure liquid state and then enters the liquid storage dryer. After the water and impurities are removed by the liquid storage dryer, it flows through the first three-state switch and the second three-state switch, and then is divided into two paths. One path passes through SOV1 (cab refrigerant stop valve 4), and then passes through the air conditioning thermal expansion valve 5 (air conditioning). The high-temperature and high-pressure liquid refrigerant is throttled and reduced in pressure by the air conditioning thermal expansion valve 5 and becomes a low-temperature and low-pressure liquid refrigerant and enters the evaporator 1. The low-temperature and low-pressure liquid refrigerant absorbs the heat of the air in the vehicle in the evaporator 1 and becomes a low-temperature and low-pressure gaseous refrigerant, thereby reducing the surface temperature of the evaporator 1. The air blown from the blower continuously flows through the surface of the evaporator 1, is cooled and blown out from the air outlet, and the low-temperature and low-pressure gaseous refrigerant finally flows into the electric compressor 2. Inlet; the other way passes through SOV2 (battery pack refrigerant shut-off valve 6), and then passes through the thermal expansion valve (battery). The high-temperature and high-pressure liquid refrigerant is throttled and reduced in pressure by the expansion valve to become a low-temperature and low-pressure liquid refrigerant and enters the battery cooling chiller (battery cooler 8). The low-temperature and low-pressure liquid refrigerant absorbs the heat of the battery pack cooling circulating water in the battery cooling chiller and becomes a low-temperature and low-pressure gaseous refrigerant. Finally, it also flows into the suction port of the electric compressor 2. The cooled battery cooling circulating water is pumped into the battery pack module 10 by the battery circuit electronic water pump 9 to cool each battery pack (battery pack 1-5) in the battery pack module 10. The battery pack outlet water (hot water) flows into the water bag outside the battery cooling chiller (battery cooler 8), and the battery cooling chiller (battery cooler 8) cools the circulating water in the water bag. The on / off of SOV1 (cab refrigerant shut-off valve 4) and SOV2 (battery pack refrigerant shut-off valve 6) is controlled by the VCU (Vehicle Control Unit, the core electronic control unit that implements vehicle control decisions, and realizes vehicle power control, fault management, accessory control, etc.), so that the refrigerant is allocated to the cab air-conditioning branch and the battery pack cooling branch in a certain proportion according to the cooling requirements of the cab and the battery pack. That is, the cooling process of the cab and the battery pack is controlled by controlling the on / off of SOV1 (cab refrigerant shut-off valve 4) and SOV2 (battery pack refrigerant shut-off valve 6).

[0089] It should also be noted that the integrated refrigeration system provided by this solution combines the cooling air conditioning of the cab and the cooling system of the battery into one, reducing a controller, an air conditioning compressor, a condenser assembly 3, several air conditioning refrigerant aluminum tubes, etc., which not only reduces the installation space but also reduces the cost.

[0090] It should also be noted that, considering that the temperature of each motor controller, gearbox and each motor in the electric drive circuit will affect the working efficiency of the vehicle, in actual applications, corresponding temperature sensors can also be set at each motor controller, gearbox and each motor to collect the temperature of each motor controller, gearbox and each motor in real time. In addition, a temperature sensor can be set at the output end of the low-temperature heat dissipation module to collect the temperature of the electric drive cooling circulating water output by the low-temperature heat dissipation module in real time. When the temperature of each motor controller, gearbox and each motor is too high or the temperature of the electric drive cooling circulating water is too high, an alarm needs to be issued to remind the user or operator to repair or replace the low-temperature heat dissipation module. Similarly, a corresponding temperature sensor can also be set at the output end of the battery cooler 8, and a corresponding temperature sensor can be set at the water outlet of the battery pack. When it is too high, an alarm needs to be issued to remind the user or operator to repair or replace the battery cooler 8.

[0091] It should also be noted that, considering that the vehicle is in a cold environment, in actual application, a heating device and a temperature collection device can be added inside the vehicle. When the temperature collection device detects that the temperature inside the vehicle cab or the compartment is too low, the heating device needs to be controlled to work to increase the temperature inside the vehicle cab and the compartment. Figure 2 The internal water heating PTC (Positive Temperature Coefficient, a heating device with a positive temperature coefficient), the heater core, and the heater circuit electronic water pump, wherein the heater circuit electronic water pump will pump the heater circuit cooling water into the water heating PTC, and the water heating PTC will heat the heater circuit cooling water. When the heated heater circuit cooling water flows through the heater core, the vehicle-mounted blower or an additional fan will blow cold air over the surface of the heater core. The cold air absorbs heat and becomes warm air, and then the warm air is transported to the vehicle cab and the interior of the vehicle compartment through the air transmission channel inside the vehicle to increase the temperature of the vehicle cab and the interior of the vehicle compartment. In addition, considering that the engine of the extended-range vehicle is prone to failure when starting in a cold environment, in order to ensure the normal start of the engine of the extended-range vehicle, this solution can also transfer the cooling water heated by the water heating PTC to the water channel of the engine, thereby preheating the engine before starting the engine. In addition, the above-mentioned heating function should be interlocked with the cab refrigerant shut-off valve 4, that is, the cab heating process and the cab cooling process cannot be carried out at the same time.

[0092] Please refer to Figure 3 , Figure 3 The process flow chart of an integrated refrigeration method provided by the present invention. The integrated refrigeration method is applied to the integrated refrigeration system as described above, and the method comprises:

[0093] S11: Acquire the current state of the vehicle key switch and the current temperature of the evaporator 1;

[0094] S12: Determine whether the user's air conditioning and cooling demand and the speed requirement of the electric compressor 2 are received;

[0095] S13: If the user's air conditioning and cooling demand and the speed requirement of the electric compressor 2 are received, the opening or closing of the cab refrigerant stop valve 4 is controlled according to the current state and the current temperature of the evaporator 1;

[0096] S14: Obtaining the maximum value of the battery cell temperature of each battery pack in the battery pack module 10;

[0097] S15: Determine whether a battery cooling request from a user is received;

[0098] S16: If the user's battery cooling demand is received, the battery pack refrigerant shut-off valve 6 is controlled to be opened or closed according to the current state, the current temperature of the evaporator 1 and the maximum value of the battery cell temperature.

[0099] In the present invention, considering that the vehicle has different requirements for air conditioning and refrigeration after starting or when not starting, and the current temperature of the evaporator 1 has different requirements for air conditioning and refrigeration, the present solution first obtains the current state of the vehicle's key switch and the current temperature of the evaporator 1, and determines whether the user's air conditioning and refrigeration requirements and the speed requirements of the electric compressor 2 are received. If the user's air conditioning and refrigeration requirements and the speed requirements of the electric compressor 2 are received, it is proved that the air conditioning and refrigeration function is required. At this time, the opening or closing of the cab refrigerant shut-off valve 4 can be controlled according to the obtained current state and the current temperature of the evaporator 1, that is, the air conditioning and refrigeration process is controlled; similarly, the vehicle's battery refrigeration function and the battery pack module 1 0. In addition, the vehicle has different requirements for battery cooling after starting or when not starting, and the current temperature of the evaporator 1 also has different requirements for air conditioning cooling. Therefore, in order to reduce the power consumption of the refrigeration equipment, this solution first obtains the maximum value of the battery cell temperature of each battery pack in the battery pack module 10, and then determines whether the user's battery cooling requirement is received. If the user's battery cooling requirement is received, it proves that battery cooling is required at this time. Therefore, it is necessary to control the opening or closing of the battery pack refrigerant shut-off valve 6 according to the current state, the current temperature of the evaporator 1 and the maximum value of the battery cell temperature, that is, to control the battery cooling process according to actual needs, thereby reducing the actual power consumption of air conditioning cooling and battery cooling.

[0100] It should be noted that (1) the control process of the air conditioning stop valve SOV1 that controls the refrigerant distribution is roughly as follows:

[0101] 1. The key switch is in the non-ON position Key_ON=0 and the mode request sent by BMS (Battery Management System) to TMS (Thermal Management System) is cooling mode BMS_TMS_ReqMode=1;

[0102] 2. The key switch is in the ON position Key_ON=1 and the mode request sent by BMS to TMS is cooling mode BMS_TMS_ReqMode=1;

[0103] 3. The initial state of the air conditioner (ACState), the air conditioner has no cooling demand ACStateReq=0. ① When the AC button of the air conditioner is pressed, AirConditionSwitch=1, and the speed request VCU_AirCondition_Speed>0 sent by the VCU to the air conditioner compressor, the air conditioner enters state 1 (ACState1), and the air conditioner has a cooling demand ACStateReq=1; if the AC button of the air conditioner is not pressed, AirConditionSwitch=0 and the speed request VCU_AirCondition_Speed=0 sent by the VCU to the air conditioner compressor, the air conditioner returns to the initial state (ACState), and the air conditioner has no cooling demand ACStateReq=0; ② When the air conditioner is in state 1 (ACState1), when the AC button of the air conditioner is pressed, AirConditionSwitch=1, and the speed request VCU_AirCondition_Speed=0 sent by the VCU to the air conditioner compressor, the air conditioner enters state 2 (ACState2), and the air conditioner has a cooling demand ACStateReq=1. If at this time The speed request VCU_AirCondition_Speed ​​sent by VCU to the air conditioner compressor is > 0, and the air conditioner returns to state 1 (ACState1), and the air conditioner has a cooling demand ACStateReq=1; ③ When the air conditioner is in the initial state (ACState), when the air conditioner AC button is pressed AirConditionSwitch=1, and the air conditioner evaporator 1 temperature AC_VCU_EvaporatorTemp≥10℃, and the speed request VCU_AirCondition_Speed ​​sent by VCU to the air conditioner compressor is 0, the air conditioner enters state 2 (ACState2), and the air conditioner has a cooling demand ACStateReq=1. If the air conditioner AC button is not pressed at this time, AirConditionSwitch=0, or the speed request VCU sent by VCU to the air conditioner compressor is 0 and the air conditioner evaporator 1 temperature AC_VCU_EvaporatorTemp<7℃, the air conditioner returns to the initial state (ACState), and the air conditioner has no cooling demand ACStateReq=0;

[0104] 4. The air conditioner is in the initial state (ACState) in step 3, the air conditioner has no cooling demand ACStateReq=0, and the condition of step 2 is met; or the condition of step 1 is met, then the air conditioner stop valve SOV1 is energized to 1, and the air conditioner stop valve SOV1 is disconnected;

[0105] 5. The conditions of step 4 are not met, the air conditioning stop valve has no power SOV1=0, and the air conditioning stop valve SOV1 is turned on.

[0106] (2)The control process of the BMS cut-off valve SOV2 for controlling refrigerant distribution is roughly as follows:

[0107] 1. When the cab air conditioner cooling and battery cooling are requested simultaneously, it is regulated according to the temperature of the cab air conditioner evaporator 1 and the maximum temperature of the battery cells. In the initial state, the battery refrigerant electromagnetic cut-off valve is de-energized (open), SOV2 = 0. When the maximum temperature of the battery cell BMS_VCU_CellMaxTemp < 50 °C, and the temperature of the air conditioner evaporator 1 AC_VCU_EvaporatorTemp > 7 °C, and the air conditioner AC switch is pressed AirConditionSwitch = 1, and the BMS sends a cooling mode to the thermal management system BMS_TMS_ReqMode = 1, allowing entry into the power battery refrigerant flow regulation mode PMW_Enable = 1. The refrigerant flow is adjusted by opening and closing the electromagnetic cut-off valve SOV2 of the power battery branch.

[0108] 2. When the maximum temperature of the battery cell in the battery pack BMS_VCU_CellMaxTemp > 57 °C, or the temperature of the air conditioner evaporator 1 AC_VCU_EvaporatorTemp ≤ 4 °C, or the air conditioner AC switch is not pressed AirConditionSwitch ≠ 1, or the BMS sends a non-cooling mode to the thermal management system BMS_TMS_ReqMode ≠ 1, or the key switch is turned to a non-ON position Key_ON ≠ 1, then exit the power battery refrigerant flow regulation mode PMW_Enable = 0, and the electromagnetic cut-off valve SOV2 of the power battery branch is always in the conducting state.

[0109] 3. Enter the power battery refrigerant flow regulation mode and do not meet the conditions of step 2. When the maximum temperature of the battery cell 45 °C < BMS_VCU_CellMaxTemp ≤ 47 °C, the electromagnetic cut-off valve SOV2 is closed for 8 seconds and opened for 12 seconds every 20 seconds; when the maximum temperature of the battery cell BMS_VCU_CellMaxTemp < 43 °C and the temperature of the air conditioner evaporator 1 AC_VCU_EvaporatorTemp < 8 °C, the electromagnetic cut-off valve SOV2 is closed for 9 seconds and opened for 11 seconds every 20 seconds.

[0110] 4. Enter the power battery refrigerant flow regulation mode and do not meet the conditions of step 2. When the maximum temperature of the battery cell BMS_VCU_CellMaxTemp < 43 °C and the temperature of the air conditioner evaporator 1 10 °C < AC_VCU_EvaporatorTemp ≤ 12 °C, the electromagnetic cut-off valve SOV2 is closed for 14 seconds and opened for 6 seconds every 20 seconds.

[0111] 5. Enter the power battery refrigerant flow regulation mode and do not meet the requirements of Step 2. When the maximum battery cell temperature BMS_VCU_CellMaxTemp < 43°C and the temperature of the air conditioner evaporator 1 is 12°C < AC_VCU_EvaporatorTemp ≤ 14°C, the electromagnetic cut-off valve SOV2 closes for 16 seconds and opens for 4 seconds every 20-second cycle.

[0112] 6. Enter the power battery refrigerant flow regulation mode and do not meet the requirements of Step 2. When the maximum battery cell temperature BMS_VCU_CellMaxTemp < 43°C and the temperature of the air conditioner evaporator 1 is 14°C < AC_VCU_EvaporatorTemp, the electromagnetic cut-off valve SOV2 closes for 18 seconds and opens for 2 seconds every 20-second cycle.

[0113] 7. Enter the power battery refrigerant flow regulation mode and do not meet the requirements of Step 2. When the maximum battery cell temperature 47°C < BMS_VCU_CellMaxTemp < 50°C, the electromagnetic cut-off valve SOV2 closes for 6 seconds and opens for 14 seconds every 20-second cycle; when the maximum battery cell temperature 43°C ≤ BMS_VCU_CellMaxTemp < 45°C, the electromagnetic cut-off valve SOV2 closes for 8 seconds and opens for 12 seconds every 20-second cycle.

[0114] 8. Enter the power battery refrigerant flow regulation mode and do not meet the requirements of Step 2. When the maximum battery cell temperature 50°C ≤ BMS_VCU_CellMaxTemp < 55°C, the electromagnetic cut-off valve SOV2 closes for 4 seconds and opens for 16 seconds every 20-second cycle; when the maximum battery cell temperature 45°C ≤ BMS_VCU_CellMaxTemp < 48°C, the electromagnetic cut-off valve SOV2 closes for 6 seconds and opens for 14 seconds every 20-second cycle.

[0115] 9. Enter the power battery refrigerant flow regulation mode and do not meet the requirements of Step 2. When the maximum battery cell temperature 55°C ≤ BMS_VCU_CellMaxTemp, the electromagnetic cut-off valve SOV2 closes for 2 seconds and opens for 18 seconds every 20-second cycle; when the maximum battery cell temperature 48°C ≤ BMS_VCU_CellMaxTemp < 53°C, the electromagnetic cut-off valve SOV2 closes for 4 seconds and opens for 16 seconds every 20-second cycle.

[0116] The integrated refrigeration method provided in this embodiment corresponds to the above integrated refrigeration system, so it has the same beneficial effects as the above integrated refrigeration system. Therefore, for the embodiments of the integrated refrigeration method, please refer to the description of the embodiments of the integrated refrigeration system part, and will not be elaborated here for the time being.

[0117] As an optional embodiment, after receiving the air conditioner refrigeration demand of the user and the speed requirement of the electric compressor 2, it further includes:

[0118] Obtain the current maximum temperature value of each motor controller in the motor controller module, the current maximum temperature value of each motor in the motor group module, the current temperature of the vehicle's steering oil pump, the current temperature of the vehicle's air pump, and the current temperature of the vehicle's DC power module;

[0119] Adjusting a first duty cycle setting value of a cooling fan corresponding to the motor controller module according to a current maximum temperature value of each motor controller in the motor controller module;

[0120] Adjusting a second duty cycle setting value of a cooling fan corresponding to the motor group module according to the current maximum temperature value of each motor in the motor group module;

[0121] adjusting a third duty cycle setting value of a cooling fan corresponding to the steering oil pump of the vehicle according to a current temperature of the steering oil pump of the vehicle;

[0122] adjusting a fourth duty cycle setting value of a cooling fan corresponding to the air pump of the vehicle according to a current temperature of the air pump of the vehicle;

[0123] adjusting a fifth duty cycle setting value of a cooling fan corresponding to the DC power module according to a current temperature of the DC power module of the vehicle;

[0124] The sixth duty ratio setting value of the cooling fan corresponding to the electric compressor 2 is adjusted based on the rotation speed requirement.

[0125] In the present invention, it is considered that the interior of the vehicle also includes a motor controller module, a motor group module, a steering oil pump, an air pump, an electric compressor 2 and a cooling fan corresponding to each device, and the cooling fan of each device has its own corresponding initial duty cycle setting value. However, if the above-mentioned devices and the corresponding cooling fans are all working during the operation of the vehicle, then no matter what the temperature of each device is, the power consumption of the corresponding cooling fan is fixed. Once the temperature of an individual device is low, that is, the current device does not need the cooling fan to consume too much power, it is bound to cause a waste of power consumption. Therefore, this scheme first obtains the current maximum temperature value of each motor controller in the motor controller module, the current maximum temperature value of each motor in the motor group module, the current temperature of the vehicle's steering oil pump, and the current temperature of the vehicle's air pump, and then adjusts the corresponding cooling fan's duty cycle setting value according to the current temperature of each device, so that the temperature of the device corresponds to the power consumption of the cooling fan, thereby avoiding the occurrence of power consumption waste.

[0126] As an optional embodiment, after adjusting the sixth duty cycle setting value of the cooling fan corresponding to the electric compressor 2 based on the speed requirement, the method further includes:

[0127] Determine the current operating mode of the vehicle;

[0128] Determine whether the current working mode is hybrid mode or electric mode;

[0129] If the current working mode is the hybrid mode, the value of each setting value in the first set of setting values ​​is adjusted to be consistent with the highest value in the first set of setting values;

[0130] If the current working mode is the electric mode, the value of each set value in the second set of set values ​​is adjusted to be consistent with the highest value in the second set of set values;

[0131] Among them, the first group of setting values ​​includes: a first duty cycle setting value, a second duty cycle setting value, a third duty cycle setting value, a fourth duty cycle setting value and a fifth duty cycle setting value; the second group of setting values ​​includes: a first duty cycle setting value, a second duty cycle setting value, a third duty cycle setting value, a fourth duty cycle setting value, a fifth duty cycle setting value and a sixth duty cycle setting value.

[0132] In the present invention, it is considered that the cooling fans corresponding to the motor controller module, the motor group module, the steering oil pump, the air pump, and the electric compressor 2 are generally in the form of a cooling fan group, that is, a cooling fan will not only affect the temperature of the corresponding device, but also affect the working efficiency of other cooling fans. In addition, because the working mode of the vehicle has different requirements for the number of cooling fans, this solution first determines the current working mode of the vehicle, and then determines whether the current working mode is a hybrid mode or an electric mode, and adjusts the actual duty cycle setting value of each cooling fan according to different working modes. For example, when the current working mode of the vehicle is a hybrid mode, it is necessary to set the motor controller module, the motor group module, and the steering oil pump. and the air pump corresponding to the cooling fan duty cycle setting maximum value as a unified target duty cycle setting value, and the duty cycle setting values ​​of the remaining cooling fans are controlled to be adjusted to the target duty cycle setting value, so as to maintain the coordination and working efficiency of the cooling fan group; similarly, when the current working mode of the vehicle is the electric mode, it is necessary to set the duty cycle of the cooling fan corresponding to the motor controller module, the motor group module, the steering oil pump, the air pump, and the electric compressor 2 to the maximum value as a unified target duty cycle setting value, and control the duty cycle setting values ​​of the remaining cooling fans to be adjusted to the target duty cycle setting value, so as to maintain the coordination and working efficiency of the cooling fan group, thereby improving the actual working efficiency of the entire cooling fan group.

[0133] It should be noted that (3) the cooling fan control process is roughly as follows:

[0134] 1. When the temperature of the motor controller MCU_VCU_MCUTemp ≥ 50℃ or the temperature of the power module DCDC_VCU_DCDCTemp ≥ 60℃ or the temperature of the motor MCU_VCU_MotorTemp ≥ 60℃ or the temperature of the steering oil pump EPS_VCU_EPSTemp ≥ 60℃ or the temperature of the air pump AP_VCU_APTemp ≥ 60℃ or the temperature of the upper motor LMCU_VCU_MotorTemp ≥ 55℃ or the temperature of the upper motor controller LMCU_VCU_MCUTemp ≥ 50℃ or the AC button on the air conditioner panel is pressed AC_VCU_WorkState = 1, the VCU sends a PWM start signal to the fan VCU_FanPwmClo = 1 ; When the temperature of the motor controller MCU_VCU_MCUTemp≤45℃ and the temperature of the power module DCDC_VCU_DCDCTemp≤55℃ and the temperature of the motor MCU_VCU_MotorTemp≤55℃ and the temperature of the steering oil pump EPS_VCU_EPSTemp≤55℃ and the temperature of the air pump AP_VCU_APTemp≤55℃ and the temperature of the upper motor LMCU_VCU_MotorTemp≤50℃ and the temperature of the upper motor controller LMCU_VCU_MCUTemp≤45℃ and the AC button on the air conditioner panel is not pressed AC_VCU_WorkState=0, the VCU sends a PWM start signal VCU_FanPwmClo=0 to the fan;

[0135] 2. The PWM duty cycle setting value of the cooling fan corresponding to the speed request sent by the VCU to the air-conditioning compressor is as follows:

[0136] 1500rpm>VCU_AirCondition_Speed≥0rpm, 40%>ACSpeed_FanPWM≥3%;

[0137] 3000rpm>VCU_AirCondition_Speed≥1500rpm, 45%>ACSpeed_FanPWM≥40%;

[0138] 4500rpm>VCU_AirCondition_Speed≥3000rpm, 60%>ACSpeed_FanPWM≥45%;

[0139] 6000rpm>VCU_AirCondition_Speed≥4500rpm, 70%>ACSpeed_FanPWM≥60%;

[0140] 7000rpm>VCU_AirCondition_Speed≥6000rpm, 90%>ACSpeed_FanPWM≥70%;

[0141] When 8000rpm≥VCU_AirCondition_Speed≥7000rpm, ACSpeed_FanPWM=90%;

[0142] 3. The PWM duty cycle setting value of the cooling fan corresponding to the maximum temperature PDU_VCU_PDUTemp of the steering oil pump temperature and the air pump temperature is as follows:

[0143] When 55℃>PDU_VCU_PDUTemp≥0℃, 30%>PDUTemp_FanPWM≥0%;

[0144] When 60℃≥PDU_VCU_PDUTemp≥50℃, PDUTemp_FanPWM=30%;

[0145] 65℃>PDU_VCU_PDUTemp>60℃, 40%>PDUTemp_FanPWM>30%;

[0146] 70℃>PDU_VCU_PDUTemp≥65℃, 50%>PDUTemp_FanPWM≥40%;

[0147] 75℃>PDU_VCU_PDUTemp≥70℃, 100%>PDUTemp_FanPWM≥50%;

[0148] When 140℃≥PDU_VCU_PDUTemp≥75℃, PDUTemp_FanPWM=100%;

[0149] 4. The PWM duty cycle setting value of the cooling fan corresponding to the upper motor controller temperature LMCU_VCU_MCUTemp is as follows:

[0150] When 45℃>LMCU_VCU_MCUTemp≥0℃, 30%>LMCUTemp_FanPWM≥0%;

[0151] When 50℃≥LMCU_VCU_MCUTemp≥45℃, LMCUTemp_FanPWM=30%;

[0152] When 55℃>LMCU_VCU_MCUTemp>50℃, 50%>LMCUTemp_FanPWM>30%;

[0153] 65℃>LMCU_VCU_MCUTemp≥55℃, 100%>LMCUTemp_FanPWM≥50%;

[0154] When 120℃≥LMCU_VCU_MCUTemp≥65℃, LMCUTemp_FanPWM=100%;

[0155] 5. The PWM duty cycle setting value of the cooling fan corresponding to the upper motor temperature LMCU_VCU_MotorTemp is as follows:

[0156] 50℃>LMCU_VCU_MotorTemp≥0℃, 30%>LMCUTemp_FanPWM≥0%;

[0157] When 55℃≥LMCU_VCU_MotorTemp≥50℃, LMCUTemp_FanPWM=30%;

[0158] When 60℃>LMCU_VCU_MotorTemp>55℃, 45%>LMCUTemp_FanPWM>30%;

[0159] 65℃>LMCU_VCU_MotorTemp≥60℃, 60%>LMCUTemp_FanPWM≥45%;

[0160] When 70℃>LMCU_VCU_MotorTemp≥65℃, 75%>LMCUTemp_FanPWM≥60%;

[0161] 75℃>LMCU_VCU_MotorTemp≥70℃, 90%>LMCUTemp_FanPWM≥75%;

[0162] 80℃>LMCU_VCU_MotorTemp≥75℃, 100%>LMCUTemp_FanPWM≥90%;

[0163] When 140℃≥LMCU_VCU_MotorTemp≥80℃, LMCUTemp_FanPWM=100%;

[0164] 6. The PWM duty cycle setting value of the cooling fan corresponding to the DC24V DC power module temperature DCDC_VCU_DCDCTemp is as follows:

[0165] 55℃>DCDC_VCU_DCDCTemp≥0℃, 30%>DCDCTemp_FanPWM≥0%;

[0166] When 60℃≥DCDC_VCU_DCDCTemp≥55℃, DCDCTemp_FanPWM=30%;

[0167] 65℃>DCDC_VCU_DCDCTemp>60℃, 40%>DCDCTemp_FanPWM>30%;

[0168] 70℃>DCDC_VCU_DCDCTemp≥65℃, 50%>DCDCTemp_FanPWM≥40%;

[0169] 75℃>DCDC_VCU_DCDCTemp≥70℃, 100%>DCDCTemp_FanPWM≥50%;

[0170] When 140℃≥DCDC_VCU_DCDCTemp≥75℃, DCDCTemp_FanPWM=100%;

[0171] 7. The temperature of motor controller 1 MCU_VCU_MCUTemp, the temperature of motor controller 2 MCU2_VCU_MCUTemp, the temperature of generator controller 1 GMCU1_VCU_GMCUTemp, the temperature of generator controller 2 GMCU2_VCU_GMCUTemp, these four temperature values ​​take the maximum value (G) MCU_VCU_MCUTempMax, and its corresponding PWM duty cycle setting value MCUTemp_FanPWM for controlling the cooling fan is as follows:

[0172] When 45℃>(G)MCU_VCU_MCUTempMax≥0℃, 30%>(G)MCUTemp_FanPWM≥0%;

[0173] When 50℃≥(G)MCU_VCU_MCUTempMax≥45℃, (G)MCUTemp_FanPWM=30%;

[0174] When 55℃>(G)MCU_VCU_MCUTempMax>50℃, 55%>(G)MCUTemp_FanPWM>30%;

[0175] When 60℃>(G)MCU_VCU_MCUTempMax≥55℃, 80%>(G)MCUTemp_FanPWM≥55%;

[0176] 65℃>(G)MCU_VCU_MCUTempMax≥60℃, 100%>(G)MCUTemp_FanPWM≥80%;

[0177] When 140℃≥(G)MCU_VCU_MCUTempMax≥65℃, (G)MCUTemp_FanPWM=100%;

[0178] 8. The temperature of motor 1 MCU_VCU_MotorTemp, the temperature of motor 2 MCU2_VCU_MotorTemp, the temperature of generator 1 GMCU1_VCU_GMotorTemp, the temperature of generator 2 GMCU2_VCU_GMotorTemp, these four temperature values ​​take the maximum value (G) MCU_VCU_MotorTempMax, and its corresponding PWM duty cycle setting value MotorTemp_FanPWM for controlling the cooling fan is as follows:

[0179] 55℃>(G)MCU_VCU_MotorTempMax≥0℃, 30%>(G)MotorTemp_FanPWM≥0%;

[0180] When 60℃≥(G)MCU_VCU_MotorTempMax≥55℃, (G)MotorTemp_FanPWM=30%;

[0181] 70℃>(G)MCU_VCU_MotorTempMax>60℃, 60%>(G)MotorTemp_FanPWM>30%;

[0182] 75℃>(G)MCU_VCU_MotorTempMax≥70℃, 75%>(G)MotorTemp_FanPWM≥60%;

[0183] 80℃>(G)MCU_VCU_MotorTempMax≥75℃, 90%>(G)MotorTemp_FanPWM≥75%;

[0184] 90℃>(G)MCU_VCU_MotorTempMax≥80℃, 100%>(G)MotorTemp_FanPWM≥90%;

[0185] When 140℃≥(G)MCU_VCU_MotorTempMax≥90℃, (G)MotorTemp_FanPWM=100%;

[0186] 9. When the storage battery voltage StorageBatteryVolt ≥ DC24V, the VCU sends an allow - work signal VCU_ATSAllowWork = 1. When the storage battery voltage StorageBatteryVolt < DC23V, the VCU sends an allow - work signal VCU_ATSAllowWork = 0;

[0187] 10. When the key switch is in the ON position (KeyON = 1), or the vehicle is in the charging state and the charging wake - up signal FastChargeWakeupSignal = 1, the VCU sends an enable signal VCU_ATS_Enable = 1; when the key switch is not in the ON position (KeyON = 0), and the vehicle is in the non - charging state and the charging wake - up signal FastChargeWakeupSignal = 0, the VCU sends an enable signal VCU_ATS_Enable = 0;

[0188] 11. If VCU_ATSAllowWork = 0 in step 9 or VCU_ATS_Enable = 0 in step 10, regardless of how the temperature changes in steps 1 - 8, the PWM of the four fans is 0;

[0189] 12. If VCU_ATSAllowWork = 1 in step 9 and VCU_ATS_Enable = 1 in step 10, but VCU_FanPwmClo = 0 in step 1, the PWM of the four fans is also 0;

[0190] 13. If VCU_ATSAllowWork = 1 in step 9 and VCU_ATS_Enable = 1 in step 10, and at the same time VCU_FanPwmClo = 1 in step 1, and at this time if it is determined that the vehicle's working mode is hybrid (methanol, diesel - range - extender vehicle) according to the state of the vehicle's rocker switch, after taking the maximum value of the PWM duty ratios for controlling the cooling fans output in each of steps 3 - 8, it is output to control the rotation speed of the four fans;

[0191] 14. If VCU_ATSAllowWork = 1 in step 9 and VCU_ATS_Enable = 1 in step 10, and at the same time VCU_FanPwmClo = 1 in step 1, and at this time if it is determined that the vehicle's working mode is pure - electric according to the state of the vehicle's rocker switch, after taking the maximum value of the PWM duty ratios for controlling the cooling fans output in each of steps 3 - 8, together with the PWM duty ratio for controlling the cooling fans output in step 2, take the maximum value again, and then output it to control the rotation speed of the four fans.

[0192] As an optional embodiment, after obtaining the current state of the key switch of the vehicle and the current temperature of the evaporator 1, the method further includes:

[0193] Obtain the current temperature of the motor controller module, the current temperature of the motor group module, the current temperature of the vehicle's steering oil pump, the current temperature of the vehicle's air pump controller, the current temperature of the vehicle's DC power supply module, the vehicle's current speed, the current current value of the steering oil pump, and the current current value of the vehicle's air pump;

[0194] Determine the target duty cycle of the electronic water pump of the electric drive circuit based on the current state of the key switch, the current temperature of the motor controller module, the current temperature of the motor group module, the current temperature of the steering oil pump of the vehicle, the current temperature of the air pump controller of the vehicle, the current temperature of the DC power supply module of the vehicle, the current speed of the vehicle, the current current value of the steering oil pump, and the current current value of the air pump of the vehicle;

[0195] The current duty cycle of the electric drive circuit electronic water pump is controlled to be adjusted to the target duty cycle of the electric drive circuit electronic water pump.

[0196] In the present invention, after obtaining the current state of the vehicle's key switch and the current temperature of the evaporator 1, considering that the duty cycle of the electric drive circuit electronic water pump is related to the temperature and current of each module, it is necessary to adjust the duty cycle of the electric drive circuit electronic water pump according to the above conditions, that is, obtain the current temperature of the motor controller module, the current temperature of the motor group module, the current temperature of the vehicle's steering oil pump, the current temperature of the vehicle's air pump controller, the current temperature of the vehicle's DC power supply module, the current speed of the vehicle, the current current value of the steering oil pump, and the current current value of the vehicle's air pump; based on the current state of the key switch, the current temperature of the motor controller module, the current temperature of the motor group module, the current temperature of the vehicle's steering oil pump, the current temperature of the vehicle's air pump controller, the current temperature of the vehicle's DC power supply module, the current speed of the vehicle, the current current value of the steering oil pump, and the current current value of the vehicle's air pump, determine the target duty cycle of the electric drive circuit electronic water pump; finally, control the current duty cycle of the electric drive circuit electronic water pump to be adjusted to the target duty cycle of the electric drive circuit electronic water pump.

[0197] It should be noted that (4) the control process of the electric drive circuit cooling water pump is roughly as follows:

[0198] 1. In the initial state, the PWM value VCU sends to the water pump is VCU_WaterPumpPWM=0%. When the key switch is in the ON position Key_ON=1, the motor temperature is 45℃>MCU_VCU_MotorTemp≥40℃ or the motor controller temperature is 40℃>MCU_VCU_MCUTemp≥35℃ or the upper motor temperature is 45℃>MCU_VCU_SZMotorTemp≥40℃ or the upper motor controller temperature is 40℃>MCU_VCU_SZMCUTemp≥35℃ or DC2 When the temperature of the 4V DC power module is 40℃>DCDC_VCU_DCDCTemp≥35℃ or the maximum temperature of the steering oil pump and air pump controller is 40℃>EPS_VCU_EPSTemp≥35℃ or the S key is pressed (switching to sport mode) SCU_VCU_SKeyState=1 or the vehicle speed VehSpeed≥5km / h or the actual current value of the air pump AP_VCU_ActCurr≥1A or the actual current value of the steering oil pump EPS_VCU_ActCurr≥1A, the VCU sends PWM to the water pump. When the key switch is in the non-ON position Key_ON=0 state for 5 seconds, or the following conditions occur, the motor temperature MCU_VCU_MotorTemp<35℃ and the motor controller temperature MCU_VCU_MCUTemp<30℃ and the upper motor temperature MCU_VCU_SZMotorTemp<35℃ and the upper motor controller temperature MCU_VCU_SZMCUTemp<30℃ and the DC24V DC power module temperature DCDC_VCU_ When DCDCTemp<30℃ and the maximum temperature of the steering oil pump and air pump controller EPS_VCU_EPSTemp<30℃ and the S key is not pressed (the sport mode is not switched), SCU_VCU_SKeyState=0 and the vehicle speed VehSpeed≤2km / h and the actual current value of the air pump AP_VCU_ActCurr<0.5A and the actual current value of the steering oil pump EPS_VCU_ActCurr<0.5A, the PWM value VCU sends to the water pump VCU_WaterPumpPWM=0%;

[0199] 2. When the motor temperature is 50℃>MCU_VCU_MotorTemp≥45℃ or the motor controller temperature is 45℃>MCU_VCU_MCUTemp≥40℃ or the upper motor temperature is 50℃>MCU_VCU_SZMotorTemp≥45℃ or the upper motor controller temperature is 45℃>MCU_VCU_SZMCUTemp≥40℃ or the DC24V DC power supply module temperature is 45℃>DCDC_VCU_DCDCTemp≥40℃ or the maximum temperature of the steering oil pump and air pump controller is 45℃>EPS_VCU_EPSTemp≥40℃, the PWM value VCU sends to the water pump is VCU_WaterPumpPWM=75% ; When the motor temperature is 35℃≤MCU_VCU_MotorTemp<40℃ and the motor controller temperature is 30℃≤MCU_VCU_MCUTemp<35℃ and the upper motor temperature is 35℃≤MCU_VCU_SZMotorTemp<40℃ and the upper motor controller temperature is 30℃≤MCU_VCU_SZMCUTemp<35℃ and the DC24V DC power supply module temperature is 30℃≤DCDC_VCU_DCDCTemp<35℃ and the maximum temperature of the steering oil pump and air pump controller is 30℃≤EPS_VCU_EPSTemp<35℃, the PWM value VCU sends to the water pump is VCU_WaterPumpPWM=55%;

[0200] 3. When the motor temperature MCU_VCU_MotorTemp ≥ 50℃ or the motor controller temperature MCU_VCU_MCUTemp ≥ 45℃ or the upper motor temperature MCU_VCU_SZMotorTemp ≥ 50℃ or the upper motor controller temperature MCU_VCU_SZMCUTemp ≥ 45℃ or the DC24V DC power supply module temperature DCDC_VCU_DCDCTemp ≥ 45℃ or the steering oil pump, air pump controller maximum temperature EPS_VCU_EPSTemp ≥ 45℃, the PWM value VCU sends to the water pump VCU_WaterPumpPWM = 100%; when the motor temperature 40℃≤M CU_VCU_MotorTemp<45℃ and the motor controller temperature is 35℃≤MCU_VCU_MCUTemp<40℃ and the upper motor temperature is 40℃≤MCU_VCU_SZMotorTemp<45℃ and the upper motor controller temperature is 35℃≤MCU_VCU_SZMCUTemp<40℃ and the DC24V DC power supply module temperature is 35℃≤DCDC_VCU_DCDCTemp<40℃ and the maximum temperature of the steering oil pump and air pump controller is 35℃≤EPS_VCU_EPSTemp<40℃, the PWM value sent by VCU to the water pump VCU_WaterPumpPWM=75%.

[0201] As an optional embodiment, it also includes:

[0202] Determine the current operating mode of the vehicle;

[0203] Obtain the current working mode of the battery circuit electronic water pump 9;

[0204] Determining a target duty cycle of the battery circuit electronic water pump 9 according to the current operating mode of the vehicle and the current operating mode of the battery circuit electronic water pump 9;

[0205] The current duty cycle of the battery circuit electronic water pump 9 is controlled to be adjusted to the target duty cycle of the battery circuit electronic water pump 9 .

[0206] In the present invention, considering that the working mode of the vehicle and the working mode of the battery circuit electronic water pump 9 will affect the duty cycle of the battery circuit electronic water pump 9, this scheme first determines the current working mode of the vehicle and the current working mode of the battery circuit electronic water pump 9 respectively, and then determines the target duty cycle of the battery circuit electronic water pump 9 according to the current working mode of the vehicle and the current working mode of the battery circuit electronic water pump 9, and finally controls the current duty cycle of the battery circuit electronic water pump 9 to be adjusted to the target duty cycle of the battery circuit electronic water pump 9, so that the actual control of the battery circuit electronic water pump 9 is more accurate, thereby improving the accuracy and reliability of the scheme.

[0207] It should be noted that (5) the battery circuit cooling water pump control process is roughly as follows: in the initial state, the PWM value VCU sends to the BMS water pump is VCU_BMSWaterPumpPWM=0%. When the S key is pressed (the vehicle mode is switched to sport mode) SCU_VCU_SKeyState=1 or the mode request sent by the BMS to the TMS is the cooling mode BMS_TMS_ReqMode=1 or the mode request sent by the BMS to the TMS is the self-circulation mode BMS_TMS_ReqMode=3, the PWM value VCU_BMS sent to the BMS water pump is VCU_BMS WaterPumpPWM=100%; when the S key is not pressed (the vehicle mode is not switched to sport mode), SCU_VCU_SKeyState≠1 and the mode request sent by BMS to TMS is non-cooling mode BMS_TMS_ReqMode≠1 and the mode request sent by BMS to TMS is non-self-circulation mode BMS_TMS_ReqMode≠3, the PWM (Pulse-WidthModulation) value VCU_BMSWaterPumpPWM=0% is sent by VCU to the BMS water pump.

[0208] As an optional embodiment, after controlling the opening or closing of the cab refrigerant stop valve 4 according to the current state and the current temperature of the evaporator 1, the method further includes:

[0209] If the cab refrigerant stop valve 4 is open, the current required speed of the electric compressor 2 and the current water inlet temperature of the battery module 10 are obtained;

[0210] Determine the target speed of the electric compressor 2 according to the current required speed and the current inlet water temperature;

[0211] The current rotation speed of the electric compressor 2 is controlled to be adjusted to the target rotation speed of the electric compressor 2 .

[0212] In the present invention, after controlling the opening or closing of the cab refrigerant shut-off valve 4 according to the current state and the current temperature of the evaporator 1, considering that the rotation speed of the electric compressor 2 is related to the current water inlet temperature of the battery pack module 10, the rotation speed of the electric compressor 2 must be adjusted under appropriate circumstances. Therefore, when the cab refrigerant shut-off valve 4 is opened, this scheme obtains the current required rotation speed of the electric compressor 2 and the current water inlet temperature of the battery pack module 10, determines the target rotation speed of the electric compressor 2 according to the current required rotation speed and the current water inlet temperature, and finally controls the current rotation speed of the electric compressor 2 to be adjusted to the target rotation speed of the electric compressor 2. This scheme reasonably controls the rotation speed of the electric compressor 2 according to actual needs, thereby avoiding waste of power of the electric compressor 2.

[0213] It should be noted that (6) the air conditioning compressor speed control process is roughly as follows:

[0214] 1. When the AC button of the air conditioner is pressed, AirConditionSwitch=1, and the mode request sent by BMS to TMS is non-cooling mode BMS_TMS_ReqMode≠1, the compressor speed request sent by VCU to the air conditioner is VCU_AirCondition_Speed=the required speed of the air conditioner panel ACPanel_VCU_AirConditionSpeed;

[0215] 2. When the AC button of the air conditioner is pressed, AirConditionSwitch=1, and the mode request sent by BMS to TMS is cooling mode BMS_TMS_ReqMode=1, the compressor speed request sent by VCU to the air conditioner is VCU_AirCondition_Speed=air conditioner panel required speed ACPanel_VCU_AirConditionSpeed×0.3+(actual battery water inlet temperature-15℃)×(5000-1000) / (25℃-15℃), and the compressor speed request VCU_AirCondition_Speed≤8000rpm.

[0216] It should be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0217] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated refrigeration system, characterized in that: include: Evaporator, electric compressor, condenser assembly, cab refrigerant shut-off valve, air conditioning thermal expansion valve, battery pack refrigerant shut-off valve, battery thermal expansion valve, battery cooler, battery circuit electronic water pump, battery pack module, the battery pack module includes several battery packs; The evaporator is used to convert the first low-temperature and low-pressure liquid refrigerant into the first low-temperature and low-pressure gaseous refrigerant when the electric compressor is turned on and transmit it to the electric compressor, so that the electric compressor converts the first low-temperature and low-pressure gaseous refrigerant into the high-temperature and high-pressure gaseous refrigerant; The condenser assembly is used to convert the high-temperature and high-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant and transmit it to the cab refrigerant stop valve and the battery pack refrigerant stop valve; The air conditioning thermal expansion valve is used to convert the high-temperature and high-pressure liquid refrigerant into a second low-temperature and low-pressure liquid refrigerant when the cab refrigerant shut-off valve is opened, and transmit the second low-temperature and low-pressure liquid refrigerant to the evaporator; The battery thermal expansion valve is used to convert the high-temperature and high-pressure liquid refrigerant into a third low-temperature and low-pressure liquid refrigerant when the battery pack refrigerant shut-off valve is opened, and transmit the third low-temperature and low-pressure liquid refrigerant to the battery cooler; The battery cooler is used to absorb the heat of the battery pack cooling circulating water, and transmit the second low-temperature and low-pressure gaseous refrigerant converted from the third low-temperature and low-pressure liquid refrigerant to the electric compressor, and pump the cooled battery pack cooling circulating water into the battery pack module of the vehicle through the battery circuit electronic water pump, and receive the battery pack cooling circulating water after absorbing the heat.

2. The integrated refrigeration system according to claim 1, characterized in that: Also includes: A first three-state switch, a second three-state switch, and an electric compressor controller; The first three-state switch is used to collect the first refrigerant pressure value at the front end of the inlet of the cab refrigerant cut-off valve; The second three-state switch is used to collect the second refrigerant pressure value at the front end of the inlet of the battery pack refrigerant cut-off valve; The electric compressor controller is used to control the electric compressor to be turned off when the first refrigerant pressure value is not within a first preset pressure range, and to control the electric compressor to be turned off when the second refrigerant pressure value is not within a second preset pressure range.

3. The integrated refrigeration system according to claim 1, characterized in that: Also includes: The liquid storage dryer is used to sequentially dry and filter the high-temperature and high-pressure liquid refrigerant after receiving the high-temperature and high-pressure liquid refrigerant transmitted by the condenser assembly, and transmit the dried and filtered high-temperature and high-pressure liquid refrigerant to the cab refrigerant shut-off valve and the battery pack refrigerant shut-off valve.

4. The integrated refrigeration system according to claim 1, characterized in that: Also includes: Electronic water pump of electric drive circuit, water bag of gearbox, water bags of motor controller corresponding to several motor controllers, water bags of motor corresponding to several motors, water bags of high-voltage auxiliary drive integrated controller corresponding to high-voltage auxiliary drive integrated controller module; The electric drive circuit electronic water pump is used to pump the electric drive cooling circulating water into each of the motor controller water bags, the gearbox water bag, each of the motor water bags and the high-voltage auxiliary drive integrated controller water bag in sequence.

5. The integrated refrigeration system according to claim 4, characterized in that: Also includes: The low-temperature heat dissipation module is used to cool the electric drive cooling circulating water flowing out of each of the motor controller water bags, the gearbox water bag, each of the motor water bags and the high-voltage auxiliary drive integrated controller water bag, and transmit the cooled electric drive cooling circulating water to the electric drive circuit electronic water pump.

6. An integrated refrigeration method, characterized in that: Applied to the integrated refrigeration system according to any one of claims 1 to 5, the method comprises: Get the current state of the vehicle's key switch and the current temperature of the evaporator; Determine whether the user's air conditioning and refrigeration demand and the speed requirement of the electric compressor are received; If the user's air conditioning and cooling demand and the speed requirement of the electric compressor are received, the opening or closing of the cab refrigerant shut-off valve is controlled according to the current state and the current temperature of the evaporator; Get the maximum temperature of each battery cell in the battery pack module; Determining whether a battery cooling demand of the user is received; If the user's battery cooling demand is received, the battery pack refrigerant shut-off valve is controlled to be opened or closed according to the current state, the current temperature of the evaporator and the maximum value of the battery core temperature.

7. The integrated refrigeration method according to claim 6, characterized in that: After receiving the user's air conditioning and refrigeration demand and the speed requirement of the electric compressor, the method further includes: Obtain the current maximum temperature value of each motor controller in the motor controller module, the current maximum temperature value of each motor in the motor group module, the current temperature of the steering oil pump of the vehicle, the current temperature of the air pump of the vehicle, and the current temperature of the DC power supply module of the vehicle; Adjusting a first duty cycle setting value of a cooling fan corresponding to the motor controller module according to a current maximum temperature value of each motor controller in the motor controller module; Adjusting a second duty cycle setting value of a cooling fan corresponding to the motor group module according to the current maximum temperature value of each motor in the motor group module; adjusting a third duty cycle setting value of a cooling fan corresponding to the steering oil pump of the vehicle according to a current temperature of the steering oil pump of the vehicle; adjusting a fourth duty cycle setting value of a cooling fan corresponding to the air pump of the vehicle according to a current temperature of the air pump of the vehicle; adjusting a fifth duty cycle setting value of a cooling fan corresponding to the DC power module according to a current temperature of the DC power module of the vehicle; A sixth duty cycle setting value of a cooling fan corresponding to the electric compressor is adjusted based on the speed requirement.

8. The integrated refrigeration method according to claim 7, characterized in that: After adjusting the sixth duty cycle setting value of the cooling fan corresponding to the electric compressor based on the speed requirement, the method further includes: determining a current operating mode of the vehicle; Determining whether the current operating mode is a hybrid mode or an electric mode; If the current working mode is the hybrid mode, adjusting the value of each setting value in the first set of setting values ​​to be consistent with the highest value in the first set of setting values; If the current working mode is the electric mode, adjusting the value of each set value in the second set of set values ​​to be consistent with the highest value in the second set of set values; Among them, the first group of setting values ​​includes: the first duty cycle setting value, the second duty cycle setting value, the third duty cycle setting value, the fourth duty cycle setting value and the fifth duty cycle setting value; the second group of setting values ​​includes: the first duty cycle setting value, the second duty cycle setting value, the third duty cycle setting value, the fourth duty cycle setting value, the fifth duty cycle setting value and the sixth duty cycle setting value.

9. The integrated refrigeration method according to claim 6, characterized in that: After obtaining the current state of the key switch of the vehicle and the current temperature of the evaporator, the method further includes: Obtaining the current temperature of the motor controller module, the current temperature of the motor group module, the current temperature of the steering oil pump of the vehicle, the current temperature of the air pump controller of the vehicle, the current temperature of the DC power supply module of the vehicle, the current speed of the vehicle, the current current value of the steering oil pump, and the current current value of the air pump of the vehicle; Determine the target duty cycle of the electronic water pump of the electric drive circuit based on the current state of the key switch, the current temperature of the motor controller module, the current temperature of the motor group module, the current temperature of the steering oil pump of the vehicle, the current temperature of the air pump controller of the vehicle, the current temperature of the DC power supply module of the vehicle, the current speed of the vehicle, the current current value of the steering oil pump, and the current current value of the air pump of the vehicle; The current duty cycle of the electric drive circuit electronic water pump is controlled to be adjusted to the target duty cycle of the electric drive circuit electronic water pump.

10. The integrated refrigeration method according to claim 6, characterized in that: Also includes: determining a current operating mode of the vehicle; Get the current working mode of the battery circuit electronic water pump; Determining a target duty cycle of the battery circuit electronic water pump according to a current operating mode of the vehicle and a current operating mode of the battery circuit electronic water pump; The current duty cycle of the battery circuit electronic water pump is controlled to be adjusted to a target duty cycle of the battery circuit electronic water pump.

11. The integrated refrigeration method according to claim 6, characterized in that: After controlling the opening or closing of the cab refrigerant cut-off valve according to the current state and the current temperature of the evaporator, the method further includes: If the cab refrigerant shut-off valve is open, the current required speed of the electric compressor and the current water inlet temperature of the battery module are obtained; Determining a target speed of the electric compressor according to the current required speed and the current water inlet temperature; The current rotation speed of the electric compressor is controlled to be adjusted to a target rotation speed of the electric compressor.

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