Air quality chamber: relative humidity and contamination controlled systems
US6251344A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Jun 26, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D22/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention provides a means and a device to control relative humidity and airborne contaminants within a defined environment. The devices and methods of the present invention enable a user to regulate the relative humidity of a defined environment and insure that extreme conditions, e.g. less than 15% or greater than 90% relative humidity, do not exist. The air quality control system can also be used to control the relative humidity in and about a narrow range. Control over relative humidity and airborne contaminants is achieved by combining an appropriate salt and water solution, such as a saturated salt solution with a solid phase of that salt, with an isolation membrane and a getter system. The present invention is particularly useful for housing sensors, such as SIR sensors, which are sensitive to relative humidity extremes. The incorporation of a relative humidity control system with a SIR sensor results in greater stability, longer life, an increased response at relative humidity extremes, and a more uniform response over the entire range of relative humidity and temperature. Unlike conventional methods and devices, the present invention uses no power, can be open …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.