Novel damper actuator for automobile air conditioner

Abstract

The invention discloses a novel damper actuator for an automobile air conditioner. A ganged switch is arranged in a controller and performs conduction and cut-off of a power supply; the output of the ganged switch is connected with the damper actuator; a negative electrode of an electric motor in the damper actuator is connected to the outer end of the ganged switch; a positive electrode of the electric motor is provided with an electric brush through an electric motor driving component; a double arc-shaped conductive band is crimped to the electric brush; an outer arc-shaped conductive band of the double arc-shaped conductive band is in forward connection with the middle end of the ganged switch through a diode D2; an inner arc-shaped conductive band of the double arc-shaped conductive band is in reverse connection with the middle end of the ganged switch through a diode D1. According to the damper actuator disclosed by the invention, mechanical blocked rotation and PTC current limitation are changed into electrical limiting control; the electric motor driving component in the improved damper actuator runs back and forth through the electric brush and the double arc-shaped conductive band; when the electric motor driving component runs to be in place, the electric motor driving component is completely separated from a working power supply and does not work or consume electricity, so that the too early damage to an output shaft of the damper actuator due to fatigue is avoided, and the influence on the performance and the service life of the electric motor is also avoided.

Description

technical field [0001] The invention relates to the control of the damper of the automobile air conditioner, in particular to a novel actuator for the damper of the automobile air conditioner. Background technique [0002] The existing D310 automotive air-conditioning damper actuator drives the internal / external circulation damper to a specified position, and then uses a mechanical lock-up to force the motor 4 to stop rotating. [0003] Such as figure 1 As shown: 2 in the figure is a double switch, 4 is a motor, 7 is a controller 1, 8 is a damper actuator 1, RT1 and RT2 are PTC components; [0004] Firstly, in the controller one 7, the dual switch 2 is used to turn on and off the power supply, and the PTC element is connected in series to the motor 4 in the electrical circuit, and the loop current is limited by using the characteristics of the sudden change of the resistance value of RT1 and RT2 in the element when overcurrent ; In order to maintain the normal operation of...

AI Technical Summary

Problems solved by technology

[0004] Firstly, in the controller one 7, the dual switch 2 is used to turn on and off the power supply, and the PTC element is connected in series to the motor 4 in the electrical circuit, and the loop current is limited by using the characteristics of the sudden change of the resistance value of RT1 and RT2 in the element when overcurrent ; In order to maintain the normal operation of the PTC element, there will be a milliampere-level holding current in the loop. This current will always exist as long as the vehicle power supply is connected, which will not only cause energy consumption, but also affect the life of the damper actuator. The most obvious is that it will cause premature fatigue damage to the output shaft of the damper actuator 8, and at the same time affect the performance and life of the motor 4

Images