Technical description

ObjectivesTechnical descriptionInnovation

The typical washer design structure today is using as central parts of the wash process a drum and a tub were the drum contains the laundry and both are placed inside a tub to assure a closed and safe wash process.

sectionDuring the wash process, the tub has to be filled up until a certain amount with water to ensure a proper contact of the water with the laundry. This includes as well the tub volume below the drum, where typically the heater is placed. Unfortunately this amount of water does not contribute effectively to the wash process and is therefore wasted. This results also in a higher volume of water to be heated during the washing (therefore energy taken from the grid), as well as a higher amount of detergents needed to reach the desired concentration.

WHR has developed an innovative water inlet system, which is connected to the tap water and allows to directly spray fresh water into the center of the laundry. A second water path, as today conventional washer have, still provides a means to enter the detergent into the wash process conventionally, thus maintaining the same performances. Choosing the right water paths allows to manage water consumption more accurate.

Figures here illustrate the energy and water balance during the utilization of the SPRAY washing machine:


Water balance of a wash cycle

Energy balance of a wash cycle

Energy balance of a wash cycle

As can be seen, the majority of energy is consumed to heat the water, while the water consumption is equally distributed in the wash and rinsing phases.