Room ventilating method for e.g. school, involves fixing air jet on ceiling surface by coanda effect, sucking air by aspiration layer fixed to ground surface, and setting average blowing speed lower t

Abstract

An air flotation decontamination device (101) used in a room (3), its working principle is to use the primary blowing air jet (19) and suction air flow (21) attached by relying on the Coanda effect (C) to mix. The vertical ventilator device (103) of the device has a bottom suction end (104) and a top blowing end (105). The air drive means (106) moves air (A) into and out of the ventilator means. An air inlet nozzle (118) has a vertical suction surface (Sa) for sucking air in the form of an airflow (55), while the suction airflow (55) is parallel to and attached to on the floor (6). A blowing nozzle (129) utilizing the surface effect at the ceiling (20) has a forward porous blowing surface (Ss). The blowing nozzle produces a primary air jet (19) that adheres to the ceiling (20) by virtue of the Coanda effect (C). A contaminant removal device (127) removes contaminants from the air. The effective area (Sae) of the suction surface (Ss) is smaller than the effective area (Sse) of the blowing surface (Ss). This arrangement eliminates the "slanted disruptive diverter air flow" commonly found in ventilation systems employing attached air flow.

Description

technical field [0001] The present invention relates to a method and a device for ventilation and airborne decontamination, the purpose of which is to reduce the amount of contaminated particles suspended in the air in a room, the mode of operation comprising: [0002] by mixing; [0003] Using two Coanda effects; [0004] using a blown primary jet attached to the ceiling; and [0005] Use a suction flow attached to the floor. Background technique [0006] Air conditioning methods have traditionally been technically classified according to the way air is distributed in the room being conditioned. In this way, the methods of air conditioning a room can be classified as follows: [0007] Ventilation by moving air like a piston with unidirectional flow; [0008] Ventilation by moving air through thermal stratification; [0009] area ventilation; [0010] ventilation by mixing; and [0011] Ventilation is provided by local jets. [0012] In ventilation terminology, "pri...

AI Technical Summary

Problems solved by technology

The patent does not describe in any way relying on the Coanda effect to attach the air jet to the ceiling, nor does it describe relying on the Coanda effect to attach the intake air stream to the floor

The air outlet of the quarter-cylindrical HEPA filter may cause the primary air jet to be blown obliquely to the floor, and it is not conducive to the primary air jet becoming attached to the ceiling by the Coanda effect

[0070] Therefore, it is obvious that although the method of ventilation by mixing primary air jets attached to the ceiling by means of the Coanda effect and suction flow attached to the floor is known and widely used in thermal control in the field of air conditioning, , so far it has not actually been used in the field of removing contaminants floating in the air due to the phenomenon of "oblique interfering shunt air flow", and this problem of degrading the performance of removing contaminants has not been solved in the prior art. Phenomenon

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