Heat exchanger
AssigneeVolund Vaskerimaskiner A/S
InventorOle N. Svenningsen
Life of this patent
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Abstract
A drum type washing machine having a double-section tank to provide a space between the sections through which works water is passed so that the works water is preheated by the water contained in the tank before this latter water is discharged to the sewer system. It is thus possible to recover and save thermal energy.
Claims7
In a drum type washing machine wherein a perforated cylindrical washing drum is suspended for rotation about a substantially horizontal axis within a cylinder-shaped tank, said tank having at least one inlet for cold water and one outlet for discharging waste washing water, and heating means for heating the water within said tank, the improvement comprising, said tank being constructed as a double-walled tank to provide an inner and an outer wall and a space between the two walls, an inlet and an outlet near the top of the tank through the outer wall thereof communicating with said space, and a partition between said inner and outer walls within said space near the top of said tank and between said inlet and outlet so that water entering the inlet to said space passes through said space around the bottom of said tank to the outlet to said space.
Dependencies are inferred from the claim text.