PTC air heater employing triangular PTC heating elements
US4876436A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1988 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Jul 27, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/14
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An electrically powered forced air heater includes six triangular PTC heating elements co-planarly disposed within a circular shroud with a apex of each element being disposed adjacent a common central point and the sides of the six PTC heating elements which are opposite the aforesaid apexes forming a hexagon. The area collectively occupied by the six PTC heating elements is greater than 78% of the cross sectional area of the circular shroud. The PTC heating elements are provided with a multiplicity of air flow holes therethrough and an electric fan is arranged to force air through the holes without interference with the rotational component of the fan-forced air vortex before the fan forced air strikes the PTC heating elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.