Heat recovery system for a dishwasher

Details Heat recovery system for a dishwasher Heat recovery system for a dishwasher

1980-10-27

1982-04-27

Bleutge, Robert L.

Cleaning and liquid contact with solids

Apparatus

Electrically controlled

134107, 134111, B08B 302

Patent

active

043265510

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.

REFERENCES:
patent: 1332712 (1920-03-01), Couch
patent: 1899019 (1933-02-01), Deutsch
patent: 2249792 (1941-07-01), Skinner
patent: 4134003 (1979-01-01), Hahn
patent: 4156621 (1979-05-01), Andrews
patent: 4254788 (1981-03-01), Helwig, Jr.

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