The SPRAY technology applies to washing machine and its main technical objective was to finalize the development of the hardware and the correct algorithms in order to control the spray process and adapt it to load sizes, fiber types and other potential settings and usages, driven by the user.
Spray technology aims to reduce resources usage of the domestic washing machine, demonstrating the feasibility of a new process based on an innovative water distribution system, which allows to directly spray wash water into the center of the laundry, thus maintaining the same washing performances, but with reduced resources of water and energy.
The Spray technology has been developed by Whirlpool Corporation in collaboration with Pasell and Seeber+Partner and co-funded by the Eco-Innovation initiative of the EU.
The typical washer design structure today is using as central parts of the wash process a drum and a lifter were the drum contains the laundry and both are placed inside a lifter to assure a closed and safe wash process.
During the wash process, the lifter has to be filled up until a certain amount with water to ensure a proper contact of the water with the laundry. 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.
SPRAY is the 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 washers have, still provides a means to enter the detergent into the wash process conventionally, thus maintaining the same performances.
With the aim to monitor and effectively assess the full environmental impacts of SPRAY technology, a Life Cycle Assessment is being performed.
SPRAY is unique in keeping the same customer satisfaction on wash and rinse performances, while reducing at the same time:
- water consumption of an average of 27%
- average energy consumption of more than 10%
- detergent quantity of about 5%.
For a typical household, this will result in an annual water reduction of more than 3m³ per year.