It can realize high-voltage structure cognition of electric vehicle electric air-conditioning system, study of control principle of electric air-conditioning system, and high-voltage interlock function training. Bus current detection during discharge process of electric air conditioning system, setting and elimination of common faults of electric air conditioning system.
ii. Features
1. Select the original electric air conditioning system of BYD Qin PLUS-EV pure electric vehicle. It is installed on the bench without changing the relative arrangement position of the original vehicle. Intuitively recognize the main components such as electric compressor, PTC heating module, air conditioning evaporation box, air conditioning control module, and air conditioning expansion valve. The low-voltage control line and the high-voltage power line are all original vehicle parts, the length is increased, the high-voltage power line is orange, plus a protective bellows, and a warning mark is added at the connection. In the power-on state, it is strictly forbidden to plug and unplug any high-voltage power line. To enable the trainees to understand the components and connections of the electric air-conditioning system training components as soon as possible.
2. An electric compressor driven by an air conditioner driver draws gaseous refrigerant from the evaporator and presses it into the condenser. The high-pressure gaseous refrigerant is liquefied by the condenser for heat exchange (heat release), and the heat is carried away by the air outside the vehicle. The high-pressure liquid refrigerant is de-pressurized by the throttling action of the expansion valve, and the low-pressure liquid refrigerant is vaporized in the evaporator for heat exchange (heat absorption), and the cooled air near the evaporator is blown into the passenger compartment through the blower. The gaseous refrigerant is pumped away by the compressor and then pumped into the condenser, so that the refrigerant circulates in a closed loop, that the heat in the passenger compartment is continuously discharged to the outside of the vehicle, and that the temperature in the passenger compartment is lowered to a suitable level. The bench displays the operating pressure values of the high-pressure end and the low-pressure end through special pipelines and instruments, so that students can intuitively recognize the characteristics of high and low pressure pipeline changes.
3.The training board is equipped with a teaching board, which fully displays the working principle diagram of the air conditioning and heating system, and installs detection terminals, with no less than 60 detection terminals. With the help of tools such as multimeters, real-time detection of parameter changes in various states. The length of the teaching board is not less than 1600mm, which can satisfy 2 students at the same time for testing and learning in different parts.
4.The training bench consists of a platform and a teaching board. The platform is placed horizontally and the main components are installed. Four casters, two swivel casters and two directional wheels are installed at the bottom of the platform, which can move flexibly. At the same time, the universal caster has a self-locking device, which can fix the position. The outer diameter is not less than 5 inches, the rolling resistance of the caster is small, and it is quiet and wear-resistant.
5.The training platform is also equipped with a mainstream electric vehicle air-conditioning compressor. It is displayed by split cutting to clearly understand the internal structure and working method of the electric air-conditioning compressor of the refrigeration system. The teaching board draws the working principle of the electric air-conditioning refrigeration system.
6.The training platform is also equipped with a mainstream electric vehicle PTC heating module assembly. It is displayed in a split cutting to clearly understand the internal structure and working method of the PTC heating module assembly of the heating system. The teaching board draws the intelligent control method of the heating system.
7. The cooling fan and water tank are installed in front of the bench, which is the same as the actual vehicle position. At the same time, the hot air blowing out will not cause harm to the students' operation.
8. Equipped with an intelligent fault setting and assessment system, through the mobile WIFI wireless fault setting, the teacher sets the fault, the students analyze and find the fault point, and master the real vehicle fault handling ability. Wireless faults should be set to no less than 10 points, broken circuits, and occasional phenomena.
9. Equipped with mechanical in-situ design, by connecting the replaceable fuse in the middle of the original vehicle wiring harness, the mechanical circuit failure can be realized, and there are no less than 6 mechanical failure points.
10. It can realize high-voltage structure cognition and test training of electric vehicle electric air-conditioning system.
11. It can realize the high-voltage interlock function training and troubleshooting of electric vehicle electric air conditioning system.
12. Equipped with a clamp meter for new energy vehicles and a high-voltage test pen, which are used to control line voltage, current and other parameter measurement and orange high-voltage loop high-current non-contact measurement.
13. The bottom frame of the training platform is welded with alloy steel profiles, which are strong and reliable, and the size of the main material is not less than 40*40mm. The main profiles on both sides of the front part are made of semi-circular arc bending transition, and the upper part is protected by stainless steel handrails at the front and rear to avoid students being injured.
14.Supporting embedded new energy vehicle temperature control system teaching resource package software V1.0. Explain the structure and control principle of mainstream new energy vehicle temperature control system with 3D animation, including the following knowledge points:
14.1 System introduction: overview of temperature control system, components of temperature control system
14.2 Air Conditioning and Refrigeration System: Workflow, Circuit Control Principle
14.3 Air conditioning and heating system: work flow, circuit control principle
14.4 Battery Thermal Management System: Workflow, Circuit Control Principle
14.5 3+3 temperature control system: work flow, circuit control principle, stepless fan
14.6 Connector pins
iii. Basic Parameter
1. Air conditioner compressor working power supply: not less than 352V
2. PTC heater module working power: not less than 352V
3. External working power supply of the equipment: 220V AC, power not more than 500W
4. Equipment working temperature: -20°～+40°
5. Dimensions of the main body of platform (mm): not less than 1600*1200*1000 (length*width*height)
6. Dimensions of the teaching board (mm): not less than 1600*600*1810 (length*width*height)
iv. Basic Configuration
Air conditioner compressor, Air Conditioning Compressor(Anatomy Display), Condenser, Electronic expansion valve, Evaporator, Air conditioning panel, Water pump assembly, PTC heating module assembly, PTC heating module assembly (Anatomy display), Heater core assembly, Special clamp meter for automobiles, High voltage test pen, Movable bench and teaching board.
V. Training project
Training task 1: The cognition and test experiment of high-voltage structure of electric air-conditioning refrigeration and heating system.
Training task 2: Operation training for electric air conditioners such as refrigerant filling, vacuuming and pressure maintaining, and leakage detection.
Training task 3: The fault setting and troubleshooting experiment that the signal line of the cooling and heating cycle motor disconnection cause the cooling and heating to fail to switch normally.
Training task 4: The fault setting and troubleshooting experiment that the signal line of the mode cycle motor disconnection cause the air outlet mode to fail to switch normally.
Training task 5: The fault setting and troubleshooting experiment that the signal line of the temperature sensor of the evaporation box disconnection cause air conditioner fail to do refrigeration.
Training task 6: The fault setting and troubleshooting experiment that the signal line of the pressure sensor disconnection cause air conditioner fail to do refrigeration.
Training task 7: The fault setting and troubleshooting experiment that the blower speed regulation signal line disconnection cause to fail to blow air at the air outlet.
Training task 8: The fault setting and troubleshooting experiment that the signal line of the heating system disconnection cause to fail to heating.
Training task 9: The fault setting and troubleshooting experiment that the grounding signal of the air-conditioning control system disconnection cause the air-conditioning system to fail to work properly.
Training task 10: The fault setting and troubleshooting experiment that the power signal of the compressor disconnection cause the air conditioner fail to cooling.