The difference between electric bus air conditioning system and traditional bus air conditioning system

With the continuous development of bus technology, new energy bus, as a new type of transportation, has great advantages compared with traditional bus in alleviating the energy crisis and promoting the harmonious development of human beings and the environment. Therefore, new energy has replaced traditional bus. Become the development trend of the international automobile industry.
The function of the bus air conditioner is to keep the temperature, humidity, air cleanliness and air flow in the car in a comfortable state. Since the motor in the electric bus replaces the traditional engine, this adds a lot of difficulty to the design of the air conditioning system. Traditional cars use the engine as the power source to drive the compressor and use the engine cooling water as the heat source for the warm air, which cannot be used in electric cars.
Taking a light electric bus and electric air conditioning system as an example, the motor replaces the traditional engine, so the electric compressor replaces the transmission compressor, and the PT°C heating replaces the water heating. The air conditioning system includes electric compressor, front air conditioner main engine (PT°C heating), refrigeration pipeline assembly, overhead evaporator assembly, rear heater PTC assembly, condenser assembly, front and rear air conditioner controller assembly.
In the main assembly of the front air conditioner, the PTC heater is used to replace the front heater core. Since the PTC heater is a high-pressure and high-temperature component, in order to avoid overheating, a temperature sensor can be added on the surface of the PTC, and when the temperature is higher than the set value, the power is cut off. In order to ensure product quality, normal temperature life test, low temperature life test, high and low temperature impact test, durable overvoltage, transient overvoltage, insulation resistance, withstand voltage, drop test, and damp heat test can be carried out on PT℃ heaters before mass production , salt spray test, etc.
The electric compressor is a fully enclosed horizontal scroll compressor, which relies on the relative rotation of the fixed scroll body (fixed piece) and the movable scroll body (moving piece) to make the enclosed space A machine that releases high-pressure gas by changing the volume in it. it is efficient It has three characteristics: high height, smooth movement, and possibility of high-speed rotation. Its greatest advantage is the Small size, easy to install on the bus engine, the electric compressor is an independent device,The speed is not controlled by other components, so at low speeds, the performance is better.
The front heater core is replaced by a PTC heater in the rear heater assembly, and the structure and performance tests are the same as the PTC in the front air conditioner main assembly.
The structure of the condenser assembly adopts the advection type, which is the same as that of the conventional model; the refrigeration pipeline, the front and rear controller assemblies and the overhead evaporator assembly are the same as the conventional model.