Electric water valve for automobile air conditioner

Abstract

The invention discloses an electric water valve for an automobile air conditioner. The electric water valve comprises a micromotor and a valve body. The micromotor is arranged on the valve body through a shell, the shaft neck of a valve element penetrates out of the valve body and is located in the shell, a second gear is arranged at the portion, penetrating out of the valve body, of the shaft neck of the valve element, and a supporting plate is arranged above the second gear; the shaft neck of the second gear penetrates out of the supporting plate, annular magnetic steel is arranged on the shaft neck of the second gear, and a programmable linear Hall sensor is correspondingly arranged at the portion, below the annular magnetic steel, of the supporting plate; a first gear, a third gear and a worm wheel are arranged on the supporting plate, the first gear is meshed with the third gear, the third gear drives the worm wheel, and the worm wheel drives a worm to a main shaft of the micromotor; the shaft neck of the first gear penetrates through the supporting plate downwards and is provided with a gear meshed with the second gear. According to the electric water valve, precise rotating angle signal feedback can be achieved through calibration and programming; rotating angle and signal output is linear, and an external control unit can precisely control the valve element; the output impedance is low, and the anti-interference capability is high; due to non-contact work, the theoretical service life is infinitely long.

Description

technical field [0001] The invention relates to an electric water valve assembly for an automobile air conditioner, in particular to an electric water valve assembly utilizing a programmable linear Hall sensor. Background technique [0002] At present, there are three main types of water valve assemblies for automotive air conditioners: [0003] 1. The manual water valve that uses devices such as wire drawing to control the opening has the disadvantage that the rotation angle cannot be accurately controlled, and it is not suitable for models that require high comfort in the air outlet temperature; [0004] 2. Electromagnetic water valve (only open and close, can not control the opening), the disadvantages are: the size is large, there are certain requirements for the installation space; the electromagnetic coil is prone to failure after entering the water, which affects the air conditioning effect; [0005] 3. The disadvantage of the electric water valve that uses the servo...

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Problems solved by technology

[0003] 1. The manual water valve that uses devices such as wire drawing to control the opening has the disadvantage that the rotation angle cannot be accurately controlled, and it is not suitable for models that require high comfort in the air outlet temperature;

[0004] 2. Electromagnetic water valve (only open and close, can not control the opening), the disadvantages are: the size is large, there are certain requirements for the installation space; the electromagnetic coil is prone to failure after entering the water, which affects the air conditioning effect;

[0005] 3. The disadvantage of the electric water valve that uses the servo motor to control the opening is: the principle of position feedback in the servo motor needs to achieve a voltage change of 0.4V ~ 4.6V in a rotation angle of about 90°, and requires continuous, generally in It is achieved by coating a layer of carbon film resistors on the PCB, but this carbon film resistor has problems with life and precision.

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