Heating apparatus with humidity sensor
US4734554A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Feb 13, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/645
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heating apparatus contains a humidity sensor for detecting vapor amount generating from the heated object and a control unit for controlling the heating time on the basis of the signal output from the humidity sensor. The humidity sensor includes a first heat sensor for detecting the atmospheric temperature and a second heat sensor which is self-heated or heated by a heating source. The control unit includes a comparator for comparing the temperature change of the first heat sensor with that of the second heat sensor which change is caused by vapor generating from the heated object, and a control circuit for controlling the additional heating time on the basis of the time the signal output from the comparator took to reach the value preset for each kind of heated objects, when the preset value is reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.