Patent ID: 8176926
Filing Date: 2012-05-15
Classification: A47L,Y02B

Abstract:
1. A cleaning machine comprising: an individual cleaning chamber in which items to be cleaned are accommodated; a pump configured to circulate washing liquid within the cleaning chamber; a further pump configured to deliver fresh water; and a boiler configured to store and heat fresh water, the boiler having an associated active heat exchanger via which heat is indirectly or directly transferred from waste water, which is stored in a reservoir, to the fresh water, which is stored in the boiler, wherein the heat exchanger is arranged between a wall of the reservoir and a wall which delimits the boiler, and including a controller that can briefly reverse a polarity of a supply voltage applied to a Peltier heat exchanger in order to heat a side of the Peltier element that comprised a heat absorption side of the Peltier element prior to the polarity reversal.