Heat recovery system for a dishwasher
US4326551A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1980 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | Oct 27, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L15/247
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A heat exchanger is used in combination with a dishwasher of the type having a sump, a washing spray assembly, a circulating pump which pumps washing fluid from the sump through the washing spray assembly, a rinsing spray assembly, a source of fresh rinsing water which flows through the rinsing assembly, a booster heater for heating the rinsing water to a predetermined temperature and a drain line for draining excess washing solution from the sump. The heat recovery system includes a heat exchanger in which fresh rinsing water flows in heat exchange relation with the excess washing solution from the sump before the rinsing water reaches the booster heater. A rinse valve controlling the flow of rinsing water cooperates with a pump located on the drain line so that the rinsing water and the washing solution flow through the heat exchanger at only preselected times during the operating cycle of the dishwasher. The dishwasher includes a control which activates the pump and the rinse valve whenever articles within the dishwasher are in position to be sprayed with rinsing water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.