Christopher L Mcconnell

US Patent:

40635902, Dec 20, 1977

Filed:

Oct 22, 1976

Appl. No.:

5/734814

Inventors:

Christopher L. McConnell - Opa Locka FL

International Classification:

F28F 312

US Classification:

165135

Abstract:

The preheater for a clothes dryer preheats ambient air taken into the dryer by heat transfer from hot air discharged from the dryer, thus reducing the energy requirements of the dryer. The preheater includes a box with a heat conductive partition defining a first passage for flow of ambient air into the dryer and a second passage for flow of hot discharge air from the dryer reverse to the ambient air flow so that there is a relatively high temperature difference between the passages for effective heat transfer. Heat is transferred through the partition from discharge air to ambient air, and the partition has a serpentine configuration for increasing its heat exchanging surface area, thus improving heat transfer.