Method of metering detergent
First Claim
1. A method of metering detergent into a washing solution in large washing apparatuses and systems, comprising measuring, from a washing solution containing water and detergent, a property proportional to the detergent concentration of the washing solution, and adding detergent to the washing solution if the value of the measured property corresponds to a detergent concentration below a predetermined threshold value, the addition of detergent being allowed only during a predetermined metering period for the time when the detergent concentration corresponding to the property measured from the washing solution is below said threshold value during said metering period, and that the addition of detergent is prevented after each metering period for the time of a predetermined mixing period.
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Abstract
The invention relates to a method of metering detergent into a washing solution in large washing apparatuses and systems comprising measuring from a washing solution containing water and detergent a property proportional to the detergent concentration of the washing solution, and adding detergent to the washing solution only during a predetermined metering period (T2) when the detergent concentration corresponding to the property measured from the washing solution is below a predetermined threshold value during said metering period, and the addition of detergent being prevented after each metering period (T2) for the time of a predetermined mixing period (T1).
23 Citations
8 Claims
- 1. A method of metering detergent into a washing solution in large washing apparatuses and systems, comprising measuring, from a washing solution containing water and detergent, a property proportional to the detergent concentration of the washing solution, and adding detergent to the washing solution if the value of the measured property corresponds to a detergent concentration below a predetermined threshold value, the addition of detergent being allowed only during a predetermined metering period for the time when the detergent concentration corresponding to the property measured from the washing solution is below said threshold value during said metering period, and that the addition of detergent is prevented after each metering period for the time of a predetermined mixing period.
Specification