| 摘要 |
PURPOSE:To permit to set the opening degree of an indoor blow-off port correctly with respect to the desired amount of air by a method wherein the net of ventilation circuit is set preliminary in the space of a ceiling and the opening degree of the indoor blow-off port is set so as to obtain the desired amount of air by utilizing Kirchhoff's laws. CONSTITUTION:A blow-off port 22 is arranged so that air-conditioning air, blown off from the blow-off port 22 in a ceiling, flows uniformly along the flat surface of the ceiling. The model of a ventilating circuit net, in which air paths connecting connecting points mutually in case a fan 6 and indoor blow-off ports 1-4 are deemed to be the connecting points are supposed, is set. Subsequently, the desired blow-off amount of air from the indoor blow-off ports or the objective amount of air of the air paths is set and the specific resistance of the air path, which is determined by the structure of a building, is set. The amount of pressure drop in respective meshes of net, constituting closed circuits in the net of the ventilating circuit, is indicated as the function of the amount of air, flowing through the air paths, and the specific resistance and Kirchhoff's laws, in which the amount of respective pressure drops are zero, are employed to operate the specific resistance of the air path corresponding to the opening degree of the indoor blow-off ports so as to obtain the desired amount of air whereby the opening degree of the indoor blow-off port may be set.
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