What's the noise of car heating?

The noise of automobile heating air is mainly caused by foreign objects in the blower. It is also possible that the heater motor is damaged, or whether there are foreign objects in the fans on both sides of the motor. It is recommended to disassemble the air conditioner and check and maintain it one by one. If there are foreign objects, they can be cleaned up. If the motor is damaged, please replace it as soon as possible.

1, the heater bearing is short of oil, and poor lubrication will lead to noise. In this way, it is only necessary to remove the bearing and then add some grease to lubricate it;

2. There is a foreign body in the blower, which causes obvious abnormal sound during operation. The abnormal sound when there is a foreign body is mostly frequency. When there are foreign objects in the blower, just clean them up, and there will be no problem.

3. Do not deal with abnormal sound caused by hardening of plastic parts due to temperature problems. Just turn on the heater for ten minutes, and after the temperature of the plastic parts rises, the abnormal sound will be naturally eliminated.

The extended information car air conditioners basically have blowers, and the role of blowers is very important. When the air conditioner is heating, the high-temperature antifreeze in the engine will flow through the warm air tank, and there is a blower behind the warm air tank to let the air conditioner outlet blow out warm air. During refrigeration, the compressor continuously compresses the refrigerant and sends it to the evaporation box, which can cool the evaporation box, which can cool the air blown by the fan, so that the air outlet of the air conditioner can blow cold air.

The speed regulation of modern automobile blowers generally adopts resistance to control wind speed. Because of the series control of multiple resistors, its principle and structure are simple, and its installation and maintenance are convenient, so it is widely used. Its only disadvantage is that it takes a long time to power on, and the resistor is easy to heat up and burn out if it is not cooled for a long time.

Therefore, the resistance part of the fan is mostly placed inside the fan. When the fan works, it rotates to supply air for cooling, so that the resistance of the fan dissipates heat and the resistance life is prolonged. The speed regulating resistor is generally installed on the evaporator assembly and cooled by airflow. In order to prevent the temperature of the resistor from rising continuously due to the operation of the blower, it is necessary to add a temperature protection switch in the circuit so as to cut off the blower circuit in time when the temperature of the resistor is too high.