Title:
【発明の名称】暖房,換気および空調システムにおける換気率および室内空気品質を制御する方法および装置
Document Type and Number:
Japanese Patent JPH07505213
Kind Code:
A
Abstract:
An apparatus and method indirectly determines the amount of outside air introduced into the ventilation system of a structure to control the indoor air quality in the structure. Test gas concentrations, preferably carbon dioxide concentrations, are measured for return air, outside air and mixed (supply) air. The flow rate of mixed air is measured. The volume of outside air introduced into the system is determined through use of the test gas concentration measurements without directly measuring the volume or flow rate of outside air. Preferably, a single sensor is utilized to measure each of the trace gas concentrations in the return air, outside air and supply air, and the various measurements sequentially multiplexed to a controller. Moreover, for calibrating the apparatus, a return air sensor is calibrated to the outside air and a mixed air sensor is calibrated to the outside air or the return air to eliminate inaccuracy due to sensor drift.
Inventors:
Janu, George, Jay
Terrier, Mark, W
Dollies, Kirk, H
Terrier, Mark, W
Dollies, Kirk, H
Application Number:
JP51018094A
Publication Date:
June 08, 1995
Filing Date:
October 12, 1993
Export Citation:
Assignee:
Johnson Service Company
International Classes:
F24F7/08; F24F11/02; F24F11/00; (IPC1-7): F24F11/02
Attorney, Agent or Firm:
Toshihito Yamamoto