Hot-air device
US6683285B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2002 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Jan 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Hot-air device with a heating element situated in a stream of air, with a carrier consisting of temperature-resistant material and heating wires located in the air channels, and with at least one metal mount for the carrier, wherein the temperature-resistant material of the carrier comes into at least partial electrical contact with the metal mount, and is connected to a device for interrupting the heating circuit, which, during heating, interrupts the heating circuit when a threshold value is reached owing to the measuring current discharged over the insulating material and the contact element. The direct and very quick measuring principle enables a simple and inexpensive protection of the heating element, as well as control and regulation without additional sensors. It is possible to control or regulate the hot-air temperature of the hot-air device via the measuring current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.