Turbidity sensor and water-bearing domestic appliance equipped therewith
A technology for turbidity sensors and household appliances, which can be used in household appliances, household cleaning devices, applications, etc., and can solve the problems of declining effects, weak long-term effects of surface treatment, and updating the hydrophilic properties of turbidity sensors, etc.
Pending Publication Date: 2021-08-06
EMZ HANAUER
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Problems solved by technology
[0005] A problem associated with conventional turbidity sensors is that air bubbles adhere to the outer surface of the sensor housing, and in particular to the outer surface of the housing protrusion of the sensor housing
The disadvantage of these methods of surface activation is that the long-term effect of the surface treatment is weak; the effect of the surface treatment inevitably declines after a period of time
This is not a convincing solution given that in the case of household appliances a typical long service life of several years is allowed, especially since it is often not possible for the end user to renew the hydrophilic nature of the turbidity sensor with a new surface treatment
Method used
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Embodiment Construction
[0025] First refer to figure 1 . The turbidity sensor shown therein (generally designated 10) enables turbidity measurement of the aqueous liquid present in the wet chamber 12 and additionally provides a foam detection function. The latter function is only optional and can easily be omitted. It is only important for the turbidity sensor 10 to be suitable for turbidity measurement.
[0026] The wet chamber 12 is separated from the dry area 16 by a mounting wall 14 . The turbidity sensor 10 is inserted into an opening in the mounting wall 14 and held there by a clamping structure (for example in the form of a snap hook or a clamping tongue), which will not be described in detail here. explanation, but is itself known among specialists. In the case of a domestic dishwasher, the installation wall 14 is, for example, the container wall of a collecting container which forms a pump sump and is arranged directly below the pantry (dishwashing compartment) of the dishwasher, and the d...
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A turbidity sensor for a water-bearing domestic appliance includes a sensor housing having a housing main part and two housing projections protruding from the housing main part side by side and at a distance from one another, wherein the two housing projections delimit between them a measuring channel for a liquid to be measured. One of the housing projections emits a measuring light beam along a measuring path which runs transversely through the measuring channel to the other housing projection. The measuring path crosses the measuring channel in the channel longitudinal direction remote from a point of smallest channel width of the measuring channel or the measuring channel has a constriction at a longitudinal distance from its longitudinal midpoint, at which constriction the channel width is smaller than in a region of a longitudinal midpoint.
Description
technical field [0001] The present invention relates to a turbidity sensor for water-carrying household appliances. Background technique [0002] Turbidity sensors are used in water-carrying household appliances to determine the turbidity of aqueous liquids. For example, in the case of a dishwasher, the aqueous liquid is dishwashing water collected in a pump sump below the dishwashing chamber, or in the case of a washing machine, the aqueous liquid is washwater collected in the bottom of the washing tub . Depending on the operating phase of the household appliance, the liquid may contain, in addition to water, one or more chemical cleaning substances. The amount of foreign substances present in the water can be deduced from the measured turbidity of the aqueous liquid, where the term "foreign substances" should be understood to mean soils and additives from items to be cleaned (eg clothing, tableware) Cleaning substances for cleaning purposes. The measured turbidity can ...
Claims
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IPC IPC(8): G01N21/59G01N21/55G01N21/01
CPCG01N21/59G01N21/55G01N21/01G01N2021/555G01N2021/558G01N2021/0112A47L15/4297D06F34/22G01N21/534G01N21/5907G01N15/06A47L15/46A47L2401/10
Inventor 安德里亚斯·贝尼特马丁·伯拉比奇曼弗雷迪·西格诺里诺
Owner EMZ HANAUER