Temperature detection and control system for layered heaters
US9078293B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2013 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Aug 3, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for detecting and controlling temperature of a layered heater is provided that includes a layered heater having in one form a substrate, a first dielectric layer disposed on the substrate, a sensor layer disposed on the first dielectric layer, a second dielectric layer disposed on the sensor layer, a resistive heating layer disposed on the second dielectric layer, and a third dielectric layer disposed on the resistive heating layer. An overtemperature detection circuit is provided in one form that is operatively connected to the resistive heating layer. The circuit includes a resistor, the sensor layer, and an electromechanical relay in parallel with the sensor layer. The sensor layer defines a material having a relatively high TCR and the resistive heating layer defines a material having a relatively low TCR such that a response time of the control system is relatively fast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.