Air current interruption detection responsive to consumed PTC heater power

US6897416B2 · kind B2 · utility

Assignee

• Catem GmbH & Co. KG · DE

Inventors

• Franz Bohlender · Kandel, DE
• Michael Zeyen · Herxheim, DE

Key dates

• Filing date: Mar 14, 2003
• Grant date: May 24, 2005
• Expiry date: Mar 14, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F24H9/1872
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A heating system with PTC heating elements heats a medium that flows. In order to avoid unnecessary heating up of the PTC elements when the streaming fails, the required heat output that is to be generated by the PTC elements is compared to the electrical power actually consumed and, if a specified threshold value is under-run, the required heat output that was set is reduced accordingly.