Refrigeration control system and method of vehicle and vehicle

Abstract

The invention relates to a refrigeration control system and method for a vehicle and the vehicle. In a compartment refrigeration unit, a compressor, a condenser, a three-way valve, a first heat exchanger and a second heat exchanger are sequentially connected, and a cab air conditioner refrigeration system refrigerates a cab according to a cab refrigeration instruction; and in the compartment refrigeration unit, an evaporator is connected with a three-way valve and a compressor, the compartment refrigeration unit refrigerates the compartment according to the compartment refrigeration instruction, and the compartment refrigeration unit refrigerates the compartment according to the compartment refrigeration instruction. Therefore, the problems that a cab air conditioning system and a vehicle type refrigeration unit of an electric refrigerator car need to use two sets of refrigeration systems, the utilization rate of parts with the same function is low, and potential safety hazards of water inflow and insulation exist in a power supply module of the refrigeration unit are solved, the utilization rate of the parts with the same function is increased, and the cost of the whole car is reduced. The functions of insulation detection, overvoltage, overcurrent, electric shock protection and the like of high-voltage parts of the whole vehicle are realized, and potential safety hazards can be greatly reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle refrigeration control system, method and vehicle. Background Art

[0002] Refrigerated trucks are a special type of vehicle used to transport goods that need to be kept at low temperatures. With the improvement of people's living standards, the demand for refrigerated trucks in the cold chain market is increasing.

[0003] In the related art, electric refrigerated trucks are generally modified in the aftermarket, using an independent refrigeration unit, which is composed of a three-phase AC compressor, AC-DC converter, condenser, fan, evaporator, fan, controller and other parts to form a car refrigeration unit.

[0004] However, the cab air conditioning system and vehicle refrigeration unit of the electric refrigerated truck in the related art need to use two refrigeration systems, which has the problem of low utilization rate of parts with the same function. In addition, the refrigeration unit in the related art needs to have its own AC-DC converter for the power supply of the refrigeration unit, and the built-in high-voltage module unit has a DCDC (Direct Current-Direct Current, DC-DC converter) converter for the high-voltage power conversion of the compressor, but because the power supply module of the refrigeration unit is located in the external part of the refrigeration unit, there are safety hazards such as water ingress and insulation. Summary of the invention

[0005] The present application provides a vehicle refrigeration control system, method and vehicle to solve the problem in the related art that the cab air-conditioning system of the electric refrigerated truck and the vehicle refrigeration refrigeration unit need to use two refrigeration systems, resulting in low utilization of parts with the same function, water ingress and insulation safety hazards in the power supply module of the refrigeration unit, etc. The application improves the utilization of parts with the same function, reduces the cost of the whole vehicle, realizes the insulation detection, overvoltage, overcurrent, electric shock protection and other functions of the high-voltage parts of the whole vehicle, and can greatly reduce safety hazards.

[0006] The first aspect of the present application provides a vehicle refrigeration control system, including: a vehicle compartment refrigeration unit and a cab air conditioning refrigeration system, wherein:

[0007] The cab air - conditioning refrigeration system includes a compressor, a condenser, a three - way valve, a first heat exchanger, and a second heat exchanger. The output end of the compressor is connected to the input end of the condenser. The output end of the condenser is connected to the input end of the three - way valve. The first output end of the three - way valve is connected to the first input end of the first heat exchanger. The first output end of the first heat exchanger is connected to the input end of the compressor. The second output end of the first heat exchanger is connected to the input end of the second heat exchanger. The output end of the second heat exchanger is connected to the second input end of the first heat exchanger. The cab air - conditioning refrigeration system is used to refrigerate the cab according to the cab refrigeration instruction;

[0008] The refrigeration unit for the carriage includes an evaporator. The input end of the evaporator is connected to the second output end of the three - way valve. The output end of the evaporator is connected to the input end of the compressor. The refrigeration unit for the carriage is used to refrigerate the carriage according to the carriage refrigeration instruction.

[0009] Optionally, in some embodiments, the refrigeration control system of the vehicle further includes:

[0010] A power supply component, which is connected to the compressor and is used to supply power to the compressor.

[0011] Optionally, in some embodiments, the power supply component includes a wire - splitting part and a power supply. Among them,

[0012] The power supply is connected to the compressor through the first wire - splitting port of the wire - splitting part and is used to supply power to the compressor.

[0013] Optionally, in some embodiments, the refrigerant distribution ratio of the three - way valve is determined according to the cab refrigeration instruction and the carriage refrigeration instruction.

[0014] Optionally, in some embodiments, the refrigeration control system of the vehicle further includes:

[0015] A water pump. The input end of the water pump is connected to the output end of the second heat exchanger. The output end of the water pump is connected to the second input end of the first heat exchanger.

[0016] Optionally, in some embodiments, the refrigeration control system of the vehicle further includes:

[0017] A first expansion valve. The input end of the first expansion valve is connected to the second output end of the three - way valve. The output end of the first expansion valve is connected to the input end of the evaporator.

[0018] Optionally, in some embodiments, the refrigeration control system of the vehicle further includes:

[0019] A second expansion valve, an input end of the second expansion valve is connected to a first output end of the three-way valve, and an output end of the second expansion valve is connected to a first input end of the first heat exchanger.

[0020] In a second aspect of the embodiments of the present application, a refrigeration control method for a vehicle is provided. The method uses the refrigeration control system for a vehicle as described above. The method includes the following steps:

[0021] Receive the cab refrigeration instruction and the carriage refrigeration instruction;

[0022] Based on the cab refrigeration instruction and the carriage refrigeration instruction, collect a first load of the carriage refrigeration unit, a second load of the cab air-conditioning refrigeration system, first sensor data of the carriage refrigeration unit, and second sensor data of the cab air-conditioning refrigeration system;

[0023] Obtain a target speed of the compressor according to the first load and the second load, control the operation of the compressor based on the target speed, obtain a target outlet air temperature of the carriage refrigeration unit according to the first sensor data, obtain a target refrigeration temperature of the cab air-conditioning refrigeration system according to the second sensor data, refrigerate the carriage according to the target outlet air temperature, and refrigerate the cab according to the target refrigeration temperature.

[0024] Optionally, in some embodiments, the obtaining the target refrigeration temperature of the cab air-conditioning refrigeration system according to the second sensor data according to the target outlet air temperature of the carriage refrigeration unit includes:

[0025] Obtain a first target opening degree of a first expansion valve according to the first sensor data, and adjust a current pressure of the refrigerant of the carriage refrigeration unit to a target pressure according to the first target opening degree;

[0026] Obtain a second target opening degree of a second expansion valve according to the second sensor data, and adjust a current refrigeration temperature of the refrigerant of the first heat exchanger to the target refrigeration temperature according to the second target opening degree.

[0027] In a third aspect of the embodiments of the present application, a vehicle is provided, including the refrigeration control system for a vehicle as described above.

[0028] Accordingly, in the cab air-conditioning refrigeration system of the present application, the output end of the compressor is connected to the input end of the condenser, the output end of the condenser is connected to the input end of the three-way valve, the first output end of the three-way valve is connected to the first input end of the first heat exchanger, the first output end of the first heat exchanger is connected to the input end of the compressor, the second output end of the first heat exchanger is connected to the input end of the second heat exchanger, and the output end of the second heat exchanger is connected to the second input end of the first heat exchanger. The cab air-conditioning refrigeration system is used to refrigerate the cab according to the cab refrigeration instruction; in the carriage refrigeration unit, the input end of the evaporator is connected to the second output end of the three-way valve, and the output end of the evaporator is connected to the input end of the compressor. The carriage refrigeration unit is used to refrigerate the carriage according to the carriage refrigeration instruction. Accordingly, in the related art, the cab air-conditioning system and the vehicle refrigeration unit of the electric refrigerated vehicle need to use two sets of refrigeration systems, resulting in low utilization rate of the same functional parts and potential safety hazards such as water ingress and insulation problems in the power supply module of the refrigeration unit. The utilization rate of the same functional parts is improved, the vehicle cost is reduced, and functions such as insulation detection, overvoltage, overcurrent, and electric shock protection of the vehicle's high-voltage parts are realized, which can greatly reduce safety hazards.

[0029] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, in which:

[0031] Figure 1 is a schematic diagram of the principle of the refrigeration control system of a refrigerated vehicle in the related art;

[0032] Figure 2 is a schematic diagram of the refrigeration control system of a vehicle according to an embodiment of the present application;

[0033] Figure 3 is a schematic diagram of the refrigeration control system of a vehicle according to a specific embodiment of the present application;

[0034] Figure 4 is a flowchart of the refrigeration control method of a vehicle according to an embodiment of the present application;

[0035] Figure 5 is a block diagram of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0037] The refrigeration control system, method and vehicle of the vehicle according to the embodiments of the present application will be described below with reference to the accompanying drawings. In view of the problems in the cab air-conditioning system and the vehicle model refrigeration unit of the electric refrigerated vehicle mentioned in the above background technology, that is, two sets of refrigeration systems need to be used, resulting in low utilization rate of the same functional parts and potential safety hazards such as water ingress and insulation in the power supply module of the refrigeration unit. The present application provides a refrigeration control system for a vehicle. In this system, the cab air-conditioning refrigeration system includes a compressor, a condenser, a three-way valve, a first heat exchanger and a second heat exchanger. The output end of the compressor is connected to the input end of the condenser, the output end of the condenser is connected to the input end of the three-way valve, the first output end of the three-way valve is connected to the first input end of the first heat exchanger, the first output end of the first heat exchanger is connected to the input end of the compressor, the second output end of the first heat exchanger is connected to the input end of the second heat exchanger, and the output end of the second heat exchanger is connected to the second input end of the first heat exchanger. The cab air-conditioning refrigeration system is used to refrigerate the cab according to the cab refrigeration instruction; the carriage refrigeration unit includes an evaporator, the input end of the evaporator is connected to the second output end of the three-way valve, and the output end of the evaporator is connected to the input end of the compressor. The carriage refrigeration unit is used to refrigerate the carriage according to the carriage refrigeration instruction. Thus, the problems that the cab air-conditioning system and the vehicle model refrigeration unit of the electric refrigerated vehicle need to use two sets of refrigeration systems, resulting in low utilization rate of the same functional parts and potential safety hazards such as water ingress and insulation in the power supply module of the refrigeration unit are solved, the utilization rate of the same functional parts is improved, the cost of the whole vehicle is reduced, and functions such as insulation detection, overvoltage, overcurrent and electric shock protection of the high-voltage parts of the whole vehicle are realized, which can greatly reduce potential safety hazards.

[0038] Before introducing the refrigeration control system of the vehicle according to the embodiments of the present application, the refrigeration control system of the refrigerated vehicle in the related art will be introduced first.

[0039] Specifically, Figure 1 is a schematic diagram of the principle of the refrigeration control system of the refrigerated vehicle in the related art. As Figure 1 shown, the refrigeration control system of the refrigerated vehicle in the related art includes: a cab air-conditioning system and a carriage refrigeration unit, and two sets of refrigeration systems need to be used to refrigerate the cab and the carriage respectively. The refrigeration unit in the related art needs to be equipped with an AC / DC converter for power supply of the refrigeration unit, and the built-in high-voltage module unit has a DCDC converter for converting the high-voltage power supply of the compressor.

[0040] However, in the related art, the cab air-conditioning system and the carriage refrigeration unit use two sets of refrigeration systems, resulting in the problem of low utilization rate of the same functional parts. In addition, since the power supply module of the refrigeration unit is located in the outdoor part of the refrigeration unit, there are potential safety hazards such as water ingress and insulation.

[0041] Therefore, to solve the above problems, the embodiments of the present application propose a refrigeration control system for a vehicle. Specifically, Figure 2 The following is a schematic diagram of the refrigeration control system for a vehicle provided by the embodiments of the present application. As Figure 2 shown, the refrigeration control system 10 of the vehicle includes a carriage refrigeration unit and a cab air-conditioning refrigeration system.

[0042] Among them, the cab air-conditioning refrigeration system includes a compressor, a condenser, a three-way valve, a first heat exchanger, and a second heat exchanger. The output end of the compressor is connected to the input end of the condenser, the output end of the condenser is connected to the input end of the three-way valve, the first output end of the three-way valve is connected to the first input end of the first heat exchanger, the first output end of the first heat exchanger is connected to the input end of the compressor, the second output end of the first heat exchanger is connected to the input end of the second heat exchanger, and the output end of the second heat exchanger is connected to the second input end of the first heat exchanger. The cab air-conditioning refrigeration system is used to cool the cab according to the cab refrigeration instruction. The carriage refrigeration unit includes an evaporator. The input end of the evaporator is connected to the second output end of the three-way valve, and the output end of the evaporator is connected to the input end of the compressor. The carriage refrigeration unit is used to cool the carriage according to the carriage refrigeration instruction.

[0043] Specifically, the compressor in the embodiments of the present application is a direct-current electric compressor. The output end of the direct-current electric compressor is connected to the input end of the condenser, the input end of the direct-current electric compressor is connected to the output end of the evaporator, and the first output end of the first heat exchanger is connected to the input end of the compressor. The direct-current electric compressor is the power source of the refrigeration cycle of the refrigeration control system of the vehicle in the embodiments of the present application. During the compression process, the temperature and pressure of the refrigerant will increase, thereby providing the energy required for the refrigeration cycle.

[0044] Thus, compared with Figure 1 the refrigeration control system of the refrigerated truck shown, the refrigeration control system of the vehicle in the embodiments of the present application uses the same compressor / condenser, improving the utilization rate of the same functional parts and reducing the cost of the whole vehicle.

[0045] The condenser in the embodiments of the present application is a heat exchanger, and its main function is to cool and condense the high-temperature and high-pressure refrigerant gas discharged from the compressor into a liquid. The compressor and the condenser in the embodiments of the present application cooperate closely to jointly achieve the refrigerant circulation and cooling effect. The compressor provides power to push the refrigerant to flow in the system, while the condenser is responsible for cooling and condensing the refrigerant for the next round of circulation.

[0046] The three-way valve in the embodiment of the present application is a refrigerant ratio three-way valve, which is used to control the refrigerant distribution ratio between the cab air-conditioning refrigeration system and the carriage refrigeration unit.

[0047] Optionally, in some embodiments, the refrigerant distribution ratio of the three-way valve is determined according to the cab refrigeration instruction and the carriage refrigeration instruction.

[0048] It can be understood that the three-way valve in the embodiment of the present application is used to control the refrigerant distribution ratio between the cab air-conditioning refrigeration system and the carriage refrigeration unit. Therefore, the embodiment of the present application can determine the refrigerant distribution ratio of the three-way valve according to the cab refrigeration instruction and the carriage refrigeration instruction to meet the refrigeration requirements of the cab air-conditioning refrigeration system and the carriage refrigeration unit and achieve a suitable refrigeration effect.

[0049] Furthermore, the first heat exchanger in the embodiment of the present application is a refrigerant-coolant heat exchanger. It can be understood that the cab air-conditioning refrigeration system and the carriage refrigeration unit of the vehicle refrigeration control system in the embodiment of the present application share the same compressor and the same type of refrigerant. However, the carriage refrigeration unit needs to use a refrigerant specialized for professional refrigeration units to achieve a freezing function below 0°C. Since the cab is an air-flow space, moisture in the air will frost below 0°C, so the cab air-conditioning refrigeration system cannot directly use this refrigerant for refrigeration.

[0050] To solve the above problems, the embodiment of the present application sets a refrigerant-coolant heat exchanger in the vehicle refrigeration control system. The refrigerant and the coolant transfer energy through the heat exchanger. The freezing point temperature of the coolant is -40°C, which can transfer the refrigerant energy of the refrigeration unit to the cab to achieve cab cooling.

[0051] Specifically, the freezing point of the coolant is about -40°C, and the coolant does not solidify during the operation of the carriage refrigeration unit; heat exchange between the refrigerant side and the coolant side is achieved through the refrigerant-coolant heat exchanger. The cab air-conditioning system uses the coolant as a medium to absorb the cold in the refrigerant and transfer it to the cab.

[0052] Thus, through the refrigerant-coolant heat exchanger, the present application can achieve the sharing of the refrigerant between the carriage refrigeration unit and the cab air-conditioning refrigeration system, further improve the utilization rate of the same-function parts, and reduce the vehicle cost.

[0053] The second heat exchanger in the embodiment of the present application is an air-conditioning box refrigeration heat exchanger, which mainly undertakes the functions of heat dissipation and air cooling.

[0054] The evaporator in the embodiment of the present application is an evaporator for a refrigeration unit. Its main function is to absorb external heat to evaporate the liquid refrigerant into a gas, thereby achieving the refrigeration effect. That is to say, the evaporator in the embodiment of the present application utilizes the phase change process of the refrigerant to evaporate the low-temperature and low-pressure liquid refrigerant into a high-temperature and high-pressure gas, thereby absorbing heat and achieving the refrigeration effect.

[0055] Furthermore, the cab air-conditioning refrigeration system in the embodiment of the present application cools the cab according to the cab refrigeration instruction, and the carriage refrigeration unit cools the carriage according to the carriage refrigeration instruction.

[0056] Based on the above embodiments, it can be seen that in the embodiment of the present application, through the refrigerant-coolant heat exchanger, the cab air-conditioning refrigeration system and the carriage refrigeration unit share the same compressor and the same type of refrigerant, effectively improving the utilization rate of the same-function parts and reducing the vehicle cost.

[0057] Next, other components of the refrigeration control system of the vehicle in the embodiment of the present application will be specifically introduced.

[0058] Specifically, Figure 3 is a schematic diagram of the refrigeration control system of the vehicle in a specific embodiment of the present application, Figure 3 clearly showing the structure and connection method of the refrigeration control system of the vehicle.

[0059] Optionally, in some embodiments, the refrigeration control system of the vehicle further includes: a power supply component, which is connected to the compressor and used to supply power to the compressor.

[0060] It can be understood that as Figure 1 shown, in the refrigeration control system of a refrigerated truck in the related art, the refrigeration unit needs to be equipped with an AC-DC converter for power supply to the refrigeration unit, and the built-in high-voltage module unit has a DCDC converter for converting the high-voltage power supply of the compressor. However, the power supply module of the refrigeration unit is located in the external part of the refrigeration unit, which has safety hazards such as water ingress and insulation.

[0061] Therefore, to solve the above problems, the carriage refrigeration unit and the cab air-conditioning refrigeration system of the refrigeration control system of the vehicle in the embodiment of the present application adopt the same power supply component. The compressor in the embodiment of the present application can directly obtain power from the vehicle DCDC conversion module, and the vehicle high-voltage parts are equipped with safety devices such as insulation detection, overvoltage, overcurrent, and electric shock protection, which can greatly reduce the safety hazards.

[0062] Optionally, in some embodiments, as Figure 3 shown, the power supply component includes: a wire splitting component and a power supply. Among them, the power supply is connected to the compressor through the first wire splitting port of the wire splitting component and is used to supply power to the compressor.

[0063] Specifically, the wire splitting component in the embodiment of the present application is a wire splitting box, and the power supply in the embodiment of the present application is the vehicle high-voltage battery. This wire splitting component splits and converts the input power or data into multiple current or data signals for output.

[0064] Optionally, in some embodiments, as Figure 3 shown, the vehicle refrigeration control system further includes: a water pump, the input end of the water pump is connected to the output end of the second heat exchanger, and the output end of the water pump is connected to the second input end of the first heat exchanger.

[0065] Among them, the water pump in the embodiment of the present application is a coolant water pump. In the embodiment of the present application, by adjusting the rotation speed of the coolant-side water pump, the refrigerated coolant flows through the air-conditioning refrigeration core to provide low-temperature air for the cab.

[0066] Optionally, in some embodiments, as Figure 3 shown, the vehicle refrigeration control system further includes: a first expansion valve, the input end of the first expansion valve is connected to the second output end of the three-way valve, and the output end of the first expansion valve is connected to the input end of the evaporator.

[0067] Optionally, in some embodiments, as Figure 3 shown, the vehicle refrigeration control system further includes: a second expansion valve, the input end of the second expansion valve is connected to the first output end of the three-way valve, and the output end of the second expansion valve is connected to the first input end of the first heat exchanger.

[0068] Specifically, the first expansion valve and the second expansion valve in the embodiment of the present application are electronic expansion valves. In the embodiment of the present application, by adjusting the opening degree of the first expansion valve, the outlet air temperature of the carriage is controlled to provide a low-temperature environment for the carriage; in the embodiment of the present application, by adjusting the opening degree of the second expansion valve, the refrigeration temperature on the refrigerant side in the refrigerant-coolant heat exchanger is adjusted.

[0069] Thus, in the embodiment of the present application, through components such as the three-way valve, the first expansion valve, and the second expansion valve, the energy distribution of the carriage refrigeration unit and the cab air-conditioning refrigeration system is realized.

[0070] Based on the above embodiments, the refrigeration control system of the vehicle in the embodiments of the present application uses the same products such as a compressor / condenser and a power supply module, improving the utilization rate of parts with the same function and reducing the overall vehicle cost; the refrigeration unit for the carriage and the air-conditioning refrigeration system for the cab use the same compressor and can directly obtain power from the vehicle DCDC conversion module. The high-voltage parts of the vehicle are equipped with safety devices such as insulation detection, overvoltage, overcurrent, and electric shock protection, which can greatly reduce potential safety hazards; through the refrigerant-coolant heat exchanger, the problem of sharing the refrigerant between the refrigeration unit for the carriage and the air-conditioning refrigeration system for the cab can be solved; in addition, through components such as a three-way valve, a first expansion valve, and a second expansion valve, the energy distribution between the refrigeration unit for the carriage and the air-conditioning refrigeration system for the cab is realized. Therefore, the refrigeration control system of the vehicle in the embodiments of the present application can meet various requirements of refrigerated trucks and has high practicability.

[0071] According to the refrigeration control system of the vehicle proposed in the embodiments of the present application, the output end of the compressor is connected to the input end of the condenser, the output end of the condenser is connected to the input end of the three-way valve, the first output end of the three-way valve is connected to the first input end of the first heat exchanger, the first output end of the first heat exchanger is connected to the input end of the compressor, the second output end of the first heat exchanger is connected to the input end of the second heat exchanger, and the output end of the second heat exchanger is connected to the second input end of the first heat exchanger. The air-conditioning refrigeration system for the cab is used to refrigerate the cab according to the cab refrigeration instruction; in the refrigeration unit for the carriage, the input end of the evaporator is connected to the second output end of the three-way valve, and the output end of the evaporator is connected to the input end of the compressor. The refrigeration unit for the carriage is used to refrigerate the carriage according to the carriage refrigeration instruction. Thus, in the related art, the problems that the air-conditioning system for the cab of an electric refrigerated truck and the refrigeration unit for the carriage of the vehicle model need to use two sets of refrigeration systems, resulting in low utilization rate of parts with the same function and potential safety hazards such as water ingress and insulation in the power supply module of the refrigeration unit are solved, the utilization rate of parts with the same function is improved, the overall vehicle cost is reduced, and functions such as insulation detection, overvoltage, overcurrent, and electric shock protection of the high-voltage parts of the vehicle are realized, which can greatly reduce potential safety hazards.

[0072] Next, a refrigeration control method for a vehicle proposed in the embodiments of the present application is described with reference to the accompanying drawings. This method uses the above-mentioned refrigeration control system of the vehicle.

[0073] Figure 4 It is a flowchart of the refrigeration control method for the vehicle in the embodiments of the present application.

[0074] As Figure 4 shown, the refrigeration control method for the vehicle includes the following steps:

[0075] In step S401, a cab refrigeration instruction and a carriage refrigeration instruction are received.

[0076] Among them, the cab refrigeration instruction in the embodiments of the present application may include data such as the turning on of the cab air conditioner and the refrigeration temperature of the cab air conditioner; the carriage refrigeration instruction in the embodiments of the present application may include data such as the turning on of the carriage refrigeration and the refrigeration temperature of the carriage refrigerated compartment.

[0077] It can be understood that, in order to facilitate the control of the carriage refrigeration unit and the cab air conditioner refrigeration system, the vehicle air conditioner controller in the embodiments of the present application is compatible with the carriage refrigeration function and the cab air conditioner refrigeration function. That is to say, the user can control the carriage refrigerated compartment and the cab air conditioner through one air conditioner remote control.

[0078] In step S402, based on the cab refrigeration instruction and the carriage refrigeration instruction, the first load of the carriage refrigeration unit, the second load of the cab air conditioner refrigeration system, the first sensor data of the carriage refrigeration unit, and the second sensor data of the cab air conditioner refrigeration system are collected.

[0079] Among them, in the carriage refrigeration unit and the cab air conditioner refrigeration system, the first load and the second load in the embodiments of the present application refer to the main heat sources that need to be cooled in their respective systems. For example, for the carriage refrigeration unit, the first load may refer to the refrigeration capacity required to maintain the low-temperature environment inside the carriage, including the heat conduction of the carriage enclosure structure, the heat release of the goods themselves, the heat penetrating into the carriage through the carriage door gaps from the external environment, and the heat generated by the internal air circulation and ventilation in the carriage, etc. For the cab air conditioner refrigeration system, the second load may refer to the heat of the space and equipment that need to be cooled and the temperature adjusted in the cab, including the body heat of the driver and passengers, the heat entering through the window by sunlight, the heat generated by the electronic equipment in the cab, and the heat generated by the internal air circulation and ventilation in the cab, etc. Since the first load of the carriage refrigeration unit and the second load of the cab air conditioner refrigeration system are the main heat sources that need to be processed in their respective systems, therefore, the embodiments of the present application can ensure a stable and efficient cooling effect according to the first load and the second load.

[0080] Furthermore, relevant sensors can be installed in the carriage refrigeration unit in the embodiments of the present application, such as temperature sensors, pressure sensors, and humidity sensors, etc., for monitoring data such as the temperature, pressure, and humidity in the carriage refrigerated compartment. By collecting each data, the operating state and performance parameters of the carriage refrigeration unit can be obtained.

[0081] Furthermore, relevant sensors can be installed in the cab air conditioner refrigeration system in the embodiments of the present application, such as temperature sensors, pressure sensors, and flow sensors, etc., for monitoring data such as the temperature, pressure, humidity, operating state, and performance in the cab.

[0082] Accordingly, in the embodiments of the present application, by collecting the loads of the refrigeration units for the refrigerated compartment and the air-conditioning refrigeration system for the cab, and the sensor data of the refrigeration units for the refrigerated compartment and the air-conditioning refrigeration system for the cab, the rotational speed of the compressor, the refrigerant refrigeration temperature, etc. are adjusted.

[0083] In step S403, the target rotational speed of the compressor is obtained based on the first load and the second load, and the operation of the compressor is controlled based on the target rotational speed. The target outlet air temperature of the refrigeration unit for the refrigerated compartment is obtained according to the first sensor data, the target refrigeration temperature of the air-conditioning refrigeration system for the cab is obtained according to the second sensor data, and the compartment is refrigerated according to the target outlet air temperature, and the cab is refrigerated according to the target refrigeration temperature.

[0084] Specifically, in the embodiments of the present application, the rotational speed of the compressor is adjusted according to the first load of the refrigeration unit for the refrigerated compartment and the second load of the air-conditioning refrigeration system for the cab.

[0085] Optionally, in some embodiments, obtaining the target refrigeration temperature of the air-conditioning refrigeration system for the cab according to the target outlet air temperature of the refrigeration unit for the refrigerated compartment and the second sensor data includes: obtaining the first target opening degree of the first expansion valve according to the first sensor data, and adjusting the current pressure of the refrigerant in the refrigeration unit for the refrigerated compartment to the target pressure according to the first target opening degree; obtaining the second target opening degree of the second expansion valve according to the second sensor data, and adjusting the current refrigeration temperature of the refrigerant in the first heat exchanger to the target refrigeration temperature according to the second target opening degree.

[0086] Specifically, according to the first sensor data of the refrigeration unit for the refrigerated compartment, the opening degree of the first expansion valve is controlled, the refrigerant pressure of the refrigerated compartment system is adjusted, and further the outlet air temperature of the compartment is controlled to provide a low-temperature environment for the compartment.

[0087] In the embodiments of the present application, according to the second sensor data of the air-conditioning refrigeration system for the cab, the opening degree of the second expansion valve is controlled, and the refrigeration temperature on the refrigerant side in the refrigerant-coolant heat exchanger is adjusted; at the same time, by adjusting the rotational speed of the coolant-side water pump, the refrigerated coolant flows through the air-conditioning refrigeration core to provide low-temperature air for the cab.

[0088] In addition, when performing refrigeration control, in the embodiments of the present application, the refrigerant distribution ratio between the refrigeration unit for the refrigerated compartment and the air-conditioning refrigeration system for the cab is controlled by a three-way valve, heat exchange between the refrigerant side and the coolant side is achieved through the refrigerant-coolant heat exchanger, and the air-conditioning system for the cab uses the coolant as a medium to absorb the cold in the refrigerant and transfer it to the cab.

[0089] It should be noted that the foregoing explanation of the embodiments of the refrigeration control system for the vehicle also applies to the refrigeration control method for the vehicle in this embodiment, and will not be elaborated here.

[0090] The refrigeration control method for a vehicle according to an embodiment of the present application receives a cab refrigeration instruction and a carriage refrigeration instruction. Based on the cab refrigeration instruction and the carriage refrigeration instruction, it collects the first load of the carriage refrigeration unit, the second load of the cab air-conditioning refrigeration system, the first sensor data of the carriage refrigeration unit, and the second sensor data of the cab air-conditioning refrigeration system. It obtains the target speed of the compressor according to the first load and the second load, controls the operation of the compressor based on the target speed, obtains the target outlet air temperature of the carriage refrigeration unit according to the first sensor data, obtains the target refrigeration temperature of the cab air-conditioning refrigeration system according to the second sensor data, and cools the carriage according to the target outlet air temperature and cools the cab according to the target refrigeration temperature. Thus, it solves the problems in the related art that the cab air-conditioning system and the vehicle refrigeration unit of an electric refrigerated vehicle need to use two sets of refrigeration systems, resulting in low utilization rate of the same functional parts and potential safety hazards such as water ingress and insulation problems in the power supply module of the refrigeration unit. It improves the utilization rate of the same functional parts, reduces the vehicle cost, realizes functions such as insulation detection, overvoltage protection, overcurrent protection, and electric shock protection of the high-voltage parts of the vehicle, and can greatly reduce potential safety hazards.

[0091] Figure 5 It is a schematic structural diagram of the vehicle provided by the embodiment of the present application. The vehicle 20 includes the refrigeration control system 10 of the vehicle described above.

[0092] It should be noted that the foregoing explanation of the embodiment of the vehicle refrigeration control system also applies to the vehicle of this embodiment, and will not be repeated here.

[0093] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0094] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0095] Any process or method description depicted in the flowchart or described otherwise herein can be understood to represent a module, segment, or portion of code including one or N executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of this application includes additional implementations, where the functions may be executed in a substantially simultaneous manner or in the reverse order according to the functions involved, rather than in the order shown or discussed. This should be understood by those skilled in the art to which the embodiments of this application pertain.

[0096] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or combinations thereof. In the above-described embodiments, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with suitable combinational logic gate circuits, programmable gate arrays, field-programmable gate arrays, and the like.

[0097] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried out in implementing the above-described embodiment methods can be completed by instructing relevant hardware through a program. The said program can be stored in a computer-readable storage medium, and when executed, includes one or a combination of the steps of the method embodiment.

[0098] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A vehicle refrigeration control system, characterized in that: include: Carriage refrigeration unit and cab air conditioning refrigeration system, including: The cab air conditioning refrigeration system comprises a compressor, a condenser, a three-way valve, a first heat exchanger and a second heat exchanger, the output end of the compressor is connected to the input end of the condenser, the output end of the condenser is connected to the input end of the three-way valve, the first output end of the three-way valve is connected to the first input end of the first heat exchanger, the first output end of the first heat exchanger is connected to the input end of the compressor, the second output end of the first heat exchanger is connected to the input end of the second heat exchanger, the output end of the second heat exchanger is connected to the second input end of the first heat exchanger, and the cab air conditioning refrigeration system is used to cool the cab according to the cab refrigeration instruction; The cabin refrigeration unit includes an evaporator, the input end of the evaporator is connected to the second output end of the three-way valve, the output end of the evaporator is connected to the input end of the compressor, and the cabin refrigeration unit is used to cool the cabin according to the cabin refrigeration instruction.

2. The vehicle cooling control system according to claim 1, characterized in that: Also includes: A power supply component is connected to the compressor and is used to supply power to the compressor.

3. The vehicle cooling control system according to claim 2, characterized in that: The power supply assembly includes: a branching component and a power supply, wherein: The power supply is connected to the compressor via the first branching port of the branching component to supply power to the compressor.

4. The vehicle cooling control system according to claim 1, characterized in that: The refrigerant distribution ratio of the three-way valve is determined according to the cab cooling instruction and the compartment refrigeration instruction.

5. The vehicle cooling control system according to claim 1, characterized in that: Also includes: A water pump, wherein the input end of the water pump is connected to the output end of the second heat exchanger, and the output end of the water pump is connected to the second input end of the first heat exchanger.

6. The vehicle cooling control system according to claim 1, characterized in that: Also includes: A first expansion valve, wherein an input end of the first expansion valve is connected to the second output end of the three-way valve, and an output end of the first expansion valve is connected to an input end of the evaporator.

7. The vehicle cooling control system according to claim 1, characterized in that: Also includes: A second expansion valve, wherein an input end of the second expansion valve is connected to a first output end of the three-way valve, and an output end of the second expansion valve is connected to a first input end of the first heat exchanger.

8. A vehicle cooling control method, characterized in that: The method adopts the refrigeration control system of the vehicle as described in claims 1-7, and the method comprises the following steps: Receiving the cab cooling instruction and the compartment refrigeration instruction; Based on the cab refrigeration instruction and the cabin refrigeration instruction, collecting a first load of the cabin refrigeration refrigeration unit, a second load of the cab air conditioning refrigeration system, first sensor data of the cabin refrigeration refrigeration unit, and second sensor data of the cab air conditioning refrigeration system; A target speed of the compressor is obtained according to the first load and the second load, and the operation of the compressor is controlled based on the target speed. A target air outlet temperature of the cabin refrigeration unit is obtained according to the first sensor data, and a target cooling temperature of the cab air conditioning refrigeration system is obtained according to the second sensor data. The cabin is cooled according to the target air outlet temperature, and the cab is cooled according to the target cooling temperature.

9. The method according to claim 8, characterized in that The step of obtaining the target cooling temperature of the cab air conditioning refrigeration system according to the target air outlet temperature of the cabin refrigeration unit and according to the second sensor data includes: obtaining a first target opening of the first expansion valve according to the first sensor data, and adjusting the current pressure of the refrigerant of the vehicle compartment refrigeration unit to the target pressure according to the first target opening; A second target opening of the second expansion valve is obtained according to the second sensor data, and a current cooling temperature of the refrigerant of the first heat exchanger is adjusted to the target cooling temperature according to the second target opening.

10. A vehicle comprising the vehicle refrigeration control system according to claims 1-7.

Images