Pure electric vehicle air conditioner control system and method

Abstract

The invention discloses a pure electric vehicle air conditioner control system. The pure electric vehicle air conditioner control system comprises a condenser fan relay, a condenser fan motor, a vehicle controller, a two-way pressure switch, a temperature control amplifier, an air conditioner switch, an air blower relay, an air blower, a PTC heater switch, an air heating core body internal temperature control switch and an air blower switch. An air conditioner compressor start-stop control circuit of the pure electric vehicle air conditioner control system is composed of the air blower switch, the air conditioner switch, the evaporator surface temperature control amplifier and the two-way pressure switch in series, an air conditioner compressor starting request signal is sent to a vehicle control unit (VCU) when the air blower is started, the air conditioner switch is turned off, the temperature control switch is turned off and the two-way pressure switch is turned off, thus only one circuit is needed to start from the air blower switch of a cab to pass through an A / C switch, a temperature controller and the two-way pressure switch to directly reach the VCU, under the premise of meeting a control strategy, the length of a wire harness is decreased, the number of VCU interfaces is decreased, and the cost is lowered.

Description

technical field [0001] The invention relates to the technical field of vehicle air-conditioning control, in particular to a pure electric vehicle air-conditioning control system and method. Background technique [0002] With the increasingly serious energy and environmental problems, new energy vehicles have developed vigorously. Pure electric light commercial vehicles play an important role in urban logistics and transportation, environmental sanitation and cleaning. Compared with traditional fuel vehicles, pure electric light commercial vehicles The power system is completely different, so the air-conditioning system has also undergone tremendous changes. The traditional fuel vehicle air-conditioning compressor relies on the belt pulley integrated with the engine crankshaft to drive the air-conditioning compressor to rotate and do work to compress the refrigerant. The electromagnetic clutch is used to connect and cut off the power transmission. However, pure electric ligh...

AI Technical Summary

Problems solved by technology

[0003] In the existing pure electric vehicle air conditioning system, the VCU (vehicle controller) collects the A / C switch signal of the air conditioner, the air conditioner pressure switch signal, the evaporator temperature signal, and the wind speed signal to form a control signal through calculation and processing, and transmits it to the electric compressor through the CAN bus , the electric compressor controls the on-off of the high-voltage circuit of the air-conditioning compressor, because the vehicle controller is generally arranged on the frame, and the switches and sensors of the air-conditioning system are basically in the cab, resulting in too long wiring harnesses and increased costs. All switches and sensors of the system are connected to the VCU, resulting in an increase in the VCU hardware interface

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