Methods and devices for displacing body convection and providing a controlled personal breathing zone

Abstract

Methods and devices are provided whereby a controlled personal breathing zone is maintained using temperature controlled laminar air flow (TLA) of filtered air. A substantially laminar, descending flow of filtered air is maintained with a velocity determined by the air-temperature difference between the supplied air and the ambient air at the level of the personal breathing zone. The air-temperature of the filtered supply air can be carefully adjusted to maintain the velocity-determining difference in air-temperature within the optimum range of 0.3 to 1 0 DEG C. Thus being able to at the same time displace body convection and achieve comfort.

Description

technical field [0001] It has been found that, due to the presence of body convection, the concentration of particles and allergens in the inhaled air is generally higher during nighttime sleep or its equivalent than otherwise and elsewhere in a conventional bedroom or living room. The body-generated convection flows through the vicinity of the breathing zone, intensifying and compressing all significant host emissions from the bedding deformed by the movement of the bed. [0002] The present invention generally relates to methods and apparatus for displacing body convection and reducing airborne pollutants in the breathing zone of a person during nighttime sleep or equivalent conditions, and in particular to the use of temperature-controlled stratified airflow (below Abbreviated as TLA herein) method and apparatus. Background technique [0003] Devices for reducing residential airborne pollutants such as allergens and pollutants are useful in residential areas and public s...

AI Technical Summary

Problems solved by technology

Third, the use of such equipment creates unnecessary ventilation

In the absence of some ability to heat the supply air flow, the descending velocity of the filtered air may be too high, creating a draft

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