Automobile air conditioner blead door return difference control system and control method thereof

Abstract

The invention discloses an automobile air conditioner blead door return difference control system. A parameter acquisition module is used for acquiring the target opening degree of a blead door, the temperature of an air outlet, the air temperature of an evaporator and the water temperature of a condenser; a control module is used for acquiring the reverse air outlet temperature and the forward air outlet temperature when the blead door rotates to the target opening degree of the blead door in the opening degree decreasing direction, and the target opening degree of the blead door is output when the system judges that the temperature difference value of the reverse air outlet temperature and the forward air outlet temperature is smaller than or equal to a set threshold value; and when the system judges that the temperature difference value of the reverse air outlet temperature and the forward air outlet temperature is larger than the set threshold value, the sum of the target opening degree and the compensation opening degree of the blead door is output. The invention further discloses a control method of the control system, and when the temperature difference value of the reverse air outlet temperature and the forward air outlet temperature is larger than the set threshold value, the sum of the target opening degree and the compensation opening degree of the blead door is output. The return difference of the blead door is reduced, and the temperature control precision of the blead door is improved.

Description

technical field [0001] The invention relates to the technical field of automobile damper control, in particular to an automobile air conditioner hybrid damper return travel difference control system and a control method thereof. Background technique [0002] The air outlet temperature of the car air conditioner is determined by mixing hot and cold air through the temperature mixing damper. The mixing door is controlled by a stepping motor of the mixing door. Due to the limitation of the mechanical structure, the angles of forward rotation and reverse rotation of the mixing damper are not exactly the same. This phenomenon is called return error (abbreviated as return difference). Due to the existence of the return stroke difference, when the setting position of the mixing damper is the same, the temperature of the air outlet will be inconsistent, which brings troubles to the calibration and use of the air conditioner, and reduces the accuracy of the temperature control of th...

AI Technical Summary

Problems solved by technology

Due to the existence of the return stroke difference, when the setting position of the mixing damper is the same, the temperature of the air outlet will be inconsistent, which brings troubles to the calibration and use of the air conditioner, and reduces the accuracy of the temperature control of the air conditioner.