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Device for the volume-controlled portioning of cleaning fluid

A technology of clean fluid and volume control, applied in the field of cameras, can solve problems such as negative impact on working mode or accuracy, increased consumption, exceeding the volume of dosing, etc., and achieve the effect of improving accuracy and work efficiency

Active Publication Date: 2021-02-09
CONTINENTAL AUTOMOTIVE TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The return movement thus takes a long time, so that the cleaning process cannot be carried out quickly or can only be carried out with a reduced dosage
In addition, such devices can be negatively affected in terms of their mode of operation or accuracy, for example due to different changes in volume or hardness of the individual parts due to temperature
[0005] In addition, especially when using downstream nozzles with very small water flow rates, internal leakages prevent accurate volumetric dosing
Due to this leakage, an excessive amount of cleaning fluid flows through the device, thereby exceeding the dosing volume prescribed by the design and increasing the cost.

Method used

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  • Device for the volume-controlled portioning of cleaning fluid
  • Device for the volume-controlled portioning of cleaning fluid

Examples

Experimental program
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Effect test

Embodiment Construction

[0022] figure 1

[0023] The device 1 according to the invention is embodied substantially rotationally symmetrical about a central axis A and has an approximately sleeve-shaped housing 2 with a cavity 16 which can be filled with a cleaning fluid and which can The piston unit 9 moves along the center axis A and delimits the chamber 3 in the cavity 16 .

[0024] The inflow channel 7 , which opens into the cavity 16 , is hydraulically connected to a delivery device (not shown here) and serves to fill the cavity 16 with cleaning fluid under pressure.

[0025] The piston unit 9 is sealed radially against the side surface 4 of the cavity 16 by a sealing element 28 . When the pressure in the inflow channel 7 increases, the overpressure between the pressure upstream of the piston unit 9 in the actuating direction B relative to the pressure in the chamber 3 arranged downstream of the piston unit 9 increases. Via this pressure difference, the piston unit 9 is moved in a forward move...

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Abstract

The invention relates to a device (1) for the volume-controlled portioning of cleaning fluid, comprising a housing (2) and a piston unit (9) slidingly arranged in the housing (2), which displaces a cleaning fluid out of a chamber (3) into an out-flow channel (8). In order to provide an improved generic device, which permits an exact portioning at a reduced temperature dependency and in a quick-as-possible cleaning sequence, according to the invention, the piston unit (9) comprises a piston body (6) and at least one valve unit (5) which is arranged on the piston body (6) and guarantees a filling of the chamber (3) with the cleaning fluid in the return movement of the piston unit (9).

Description

technical field [0001] The invention relates to a device for dispensing or dosing cleaning fluid in a volume-controlled manner for cleaning installations installed in motor vehicles, in particular for cleaning optical or optoelectronic devices, in particular for cleaning in Cameras used in automatic or semi-automatic vehicle control systems to detect the environment around the vehicle. Such a device is used for the targeted, impulsive / burst delivery of a defined quantity of especially aqueous cleaning fluid, thereby enabling a particularly economical application of the cleaning fluid. Background technique [0002] For this purpose, in devices of this type, a piston actuated by a differential pressure is used to extrude the cleaning fluid from a chamber, where the volume of the chamber defined by the piston is structurally defined between one or more The metered volume or the metered quantity of cleaning fluid to be delivered by the nozzles connected downstream in the cleani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B12/06B05B15/55B60S1/48
CPCB60S1/481B60S1/56B05B12/06B05B15/55G01F11/021
Inventor T·哈恩
Owner CONTINENTAL AUTOMOTIVE TECH GMBH
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