Quality detection device and vehicle-mounted liquid storage tank thereof

Abstract

A quality detection device disclosed by the present invention comprises a mounting seat, a drainage tube and a quality sensor, the mounting seat is suitable for being mounted on a box body, the mounting seat is provided with a backflow hole, a first end of the drainage tube is in butt joint communication with the backflow hole, a second end of the drainage tube is mounted on the quality sensor, and the quality sensor is provided with a detection area for detecting the concentration of a solution. And the solution output by the second end of the drainage tube is used for spraying and washing the detection area of the quality sensor. The quality detection device can prevent the pressure relief solution from directly impacting the liquid level to generate bubbles, and can also scour the bubbles in the sensing area of the quality sensor. In addition, the invention further discloses a vehicle-mounted liquid storage tank.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a quality detection device and a vehicle-mounted liquid storage tank thereof. Background technique [0002] The quality detection device currently used in the urea tank includes a plastic head, a suction pipe, a liquid return pipe, an electronic tube, and a quality sensor. The suction pipe is used to suck out the urea solution, and the unused solution is returned to the urea tank through the return pipe. The returned solution is directly sprayed onto the urea solution. Due to the high pressure during the pressure release, the sprayed urea solution is prone to foaming when it directly hits the liquid surface. The generated bubbles will affect the accuracy of the liquid level detection by the quality detection device. When the air bubbles attached to the sensing area of ​​the quality sensor, it will cause reading deviation. [0003] Therefore, there is an urgent need for a quality detection...

AI Technical Summary

Problems solved by technology

[0002] The quality detection device currently used in the urea tank includes a plastic head, a suction pipe, a liquid return pipe, an electronic tube, and a quality sensor. The suction pipe is used to suck out the urea solution, and the unused solution is returned to the urea tank through the return pipe. The returned solution is directly sprayed onto the urea solution. Due to the high pressure during the pressure release, the sprayed urea solution is prone to foaming when it directly hits the liquid surface. The generated bubbles will affect the accuracy of the liquid level detection by the quality detection device. When the air bubbles attached to the sensing area of ​​the quality sensor, it will cause reading deviation

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