Ventilation system

Abstract

In this exchange ventilation system 1 where the low-temperature air SA is supplied into an air conditioning space, and the heated air raised by being heated in the air conditioning space is exhausted EA to perform the ventilation, a plurality of guide fins 30 are mounted on an air supply hole for the low temperature air SA to give the swirling component to the low temperature air SA blown out into the air conditioning space, the plurality of guide fins are radially mounted around a central axis of the air supply hole, and respectively inclined to a plane orthogonal to the central axis of the air supply hole at the same angle, and a cylindrical inner wall face applying the central axis of the air supply hole as its central axis, is formed around the plurality of guide fins.

Description

technical field [0001] The invention relates to a ventilation system. Background technique [0002] Ventilation systems are known as air conditioning systems capable of reducing the concentration of pollutants in living areas in conditioned spaces and maintaining comfort even at high cooling supply air temperatures. In this ventilation system, air with a temperature slightly lower than room temperature is supplied at a slow speed to the living area formed in the lower part of the air-conditioned space, and the air is heated by heat generating bodies (such as people) etc. present in the living area. An updraft is generated, thereby transporting pollutants such as dust and gas generated in the air-conditioned space to the upper side of the air-conditioned space. According to the reference (Yuan, X., O, Chen and L.R.Gllcksman: Performance Evaluation and DesignGuideline for Displacement Ventilation, ASHRAE Trans., 105(1999), pp.308), regarding the air supply velocity in this ve...

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Problems solved by technology

Therefore, many large air supply units have to be arranged in the air-conditioned space, and there is a problem that it is difficult to secure installation places for the air supply units.

Moreover, in the case where pollutants are generated from a part accompanied by heat generation or its vicinity, since the pollutants are discharged from the living area to the ceiling due to the thermal updraft, although the concentration of pollutants in the living space can be kept low, However, in the absence of concomitant heating, the transport dilution of pollutants takes place, so that there is a risk of occupants being exposed to high concentrations of polluted air

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