Automobile air conditioner blower driven by brushless direct current motor

Abstract

The invention belongs to the technical field of automobile air conditioner blowers and particularly relates to an automobile air conditioner blower driven by a brushless direct current motor. The automobile air conditioner blower comprises a wind wheel and the brushless direct current motor. The wind wheel is installed on the brushless direct current motor. The brushless direct current motor comprises a shell. A front motor cover and a rear motor cover are installed at the two ends of the shell respectively. A first installation bearing is arranged in the center of the rear motor cover. A second installation bearing is arranged in the center of the front motor cover. A motor mandrel is installed on the first installation bearing and the second installation bearing. The wind wheel is installed at the extended end of the motor mandrel. Radiating fins are arranged on the rear motor cover. According to the automobile air conditioner blower driven by the brushless direct current motor, carbon brushes and commutators are omitted, friction force during operation of the wind wheel is greatly reduced, so that the operation is smoother, the noise is reduced, the failure rate is decreased; a control module is integrated inside the motor, the weight is lowered compared with the original mode that the motor and the control module are installed separately, and connection among connecting parts and inserts is reduced.

Description

technical field [0001] The invention belongs to the technical field of automobile air-conditioning blowers, and in particular relates to an automobile air-conditioning blower driven by a DC brushless motor. Background technique [0002] With the rapid development of the automobile industry, consumers have higher and higher requirements for the driving environment, and the improvement of the blower will help improve the performance of the air conditioning system and the comfort of the vehicle. [0003] At present, common automotive air-conditioning blowers are driven by DC brushed motors. The carbon brushes of this motor are extremely easy to wear, and the carbon brushes need to be cleaned or replaced regularly, which is time-consuming and laborious; due to the high contact resistance between the carbon brush and the commutator, it is easy to generate heat. Moreover, the friction between the carbon brush and the commutator will also generate heat. If the temperature is too hi...

AI Technical Summary

Problems solved by technology

[0003] At present, common automotive air-conditioning blowers are driven by DC brushed motors. The carbon brushes of this motor are extremely easy to wear, and the carbon brushes need to be cleaned or replaced regularly, which is time-consuming and laborious; due to the high contact resistance between the carbon brush and the commutator, it is easy to generate heat. Moreover, the friction between the carbon brush and the commutator will also generate heat. If the temperature is too high, it will affect the performance of the fan and reduce the life of the fan. Due to the large resistance, the electric energy is largely converted into heat energy, so the efficiency of the DC brush motor is not high. The output power is not large; the speed regulation method is single, with only a few gears, and the speed cannot be adjusted flexibly according to the actual working conditions, and the energy consumption is relatively high; the heat dissipation structure is not reasonable enough, the heat dissipation is not sufficient, and the life of the motor is generally low

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