Method and device for local ventilation by buiding airflow and separating airflow

Abstract

To present technology of discharge and local ventilation capable of decreasing ventilation capacity and air conditioning capacity substantially by lowering the air conditioning load by introduction of fresh air by intake, and decreasing the capacity of air conditioning and ventilation facilities by eliminating consumption of electrical energy. This a method of discharging polluted air near combustion heating type cooking device (1) in a room having combustion heating type cooking device (1) to cause polluted air, comprising the steps of generating upward suction discharge stream (6) from upward position of the combustion heating type cooking device (1) to outdoor air, generating upward blow induction stream (21) from the position near the side of the combustion heating type cooking device (1) to the suction discharge stream (6), and by inductive action of this blow induction stream (21), taking up the polluted area near the surrounding of the combustion heating type cooking device (1) and forcibly collecting and delivering into the suction discharge stream (6).

Description

TECHNICAL FIELD [0001] The present invention relates to discharge method, local ventilation method, discharger, local ventilator, and ventilation system, and more particularly to an effective technology of discharge and local ventilation for use in any indoor space requiring discharge and ventilation such as factory, kitchen, smoking room, and toilet, where sources of contaminants causing polluted air can be specified in a specific area in the room, and polluted air is not seriously harmful for human health such as hot air flow, steam, odor, cigarette smoke, oil fume or dusty air. BACKGROUND ART [0002] Generally in indoor space having sources of contaminants causing polluted air such as factory, kitchen, smoking room, and toilet, discharge or ventilation for cleaning the indoor atmosphere is needed. [0003] In this case, if the polluted air is not seriously harmful for human health such as hot air flow, steam, odor, cigarette smoke, oil fume or dusty air, local ventilation method for...

AI Technical Summary

Benefits of technology

[0033] In both local ventilation methods, preferably, the air flow rate of the suction discharge stream can be set depending on the sum value of the air flow rate of blow induction stream, polluted air flow around the contaminant source guided by this blow induction stream, and air flow amount, thereby establishing balance of room air and local air simultaneously.

[0048] The leading ends of ventilation ducts of suction discharge stream generating means are opened to outdoor side, and the base end communicates with the discharge box formed as a box container, and suction opening of the suction discharge stream is opened against this discharge box in the room, so that the suction opening may be disposed freely within the discharge surface side range of the discharge box, and the degree of freedom of layout is increased in the contamination source, such as cooking apparatus, and the existing ducts can be directly used effectively.

Problems solved by technology

However, such conventional overall ventilation method has the following problems, and it has been desired to solve them.

As represented by kitchen, when the overall ventilation system is installed in a room having many sources of contaminants, the ventilation rate is enormous and discharge efficiency is poor in ventilation, and since a huge volume of fresh air is introduced as intake, the indoor air becomes same as outdoor air.

Discharge by suction and discharge stream by using mechanical power is poor in controllability, and only the contaminants cannot be discharged effectively, and heat, steam, oil fuse, odor or vapor may be stagnant in the room, and the indoor air conditioning state is poor.

Increase of ventilation air flow and air conditioning capacity leads to increase of ventilation and air conditioning equipment capacity, and also increase in initial cost and running cost of ventilation and air conditioning equipment.

In addition, increase of ventilation and air conditioning equipment capacity also leads to increase of electric capacity of equipment, and such increase of energy consumption also causes to increase outputs of global warming gases such as CO and CO2.

However, even in such local ventilation system or overall ventilation system effective in special applications, when employed as ventilation system of a room requiring a certain habitability or working efficiency, there are new problems as listed below, it is far from the level of actual execution.

That is, in the local ventilation method by draft chamber, since the sources of contaminants are enclosed by partitions, there is no risk of leak of polluted air into the room, but materials cannot be delivered onto the working surface through the door, the working efficiency is extremely poor.

From the viewpoint of working efficiency, the worker gets into the uniform air flow, and in the case of kitchen, a lower blow opening is provided, different from the upper suction opening, and not only the working efficiency is lowered, but there is also problem of sanitation.

Besides, since many small delivent fans are installed in the ceiling, the noise is very large.

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