VENT LINE AND DEVICE

To enhance a degree of the reduction of sound in a vent line, compared with installing a structure without considering a shape of the vent line, upon installing the structure for reducing the sound in the vent line.SOLUTION: A first vent line 210 has: a first portion 210A which has a first cross sec...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAZOE SHOGO, MITORIDA SHINYA, OTSU AKIHIKO, UMENAI KO, KOKUBU FUYUKI, KUMETA KOICHI, HAKUTA SHINYA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS SOUND-PRODUCING DEVICES
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Beschreibung
Zusammenfassung:	To enhance a degree of the reduction of sound in a vent line, compared with installing a structure without considering a shape of the vent line, upon installing the structure for reducing the sound in the vent line.SOLUTION: A first vent line 210 has: a first portion 210A which has a first cross sectional area; a second portion 210B which has a second cross sectional area larger than the first cross sectional area; and a third portion 210C which has an inclined inner surface 210E connecting the first portion 210A and the second portion 210B. Further, a second vent line 220 having an opening part 310 is formed. The opening part 310 is located in the inside of the first portion 210A of the first vent line 210.SELECTED DRAWING: Figure 3 【課題】音を低減するための構造を通気管路に設置するにあたり、通気管路の形状を考慮せずにこの構造を設置する場合に比べ、通気管路における音の低減度合いを高める。【解決手段】第１の通気管路２１０は、第１の断面積となる第１の部分２１０Ａと、断面積が第１の断面積よりも大きい第２の断面積となる第２の部分２１０Ｂと、および、第１の部分２１０Ａと第２の部分２１０Ｂとを接続する傾斜した内面２１０Ｅを有する第３の部分２１０Ｃとを有する。さらに、開口部３１０を有する第２の通気管路２２０が設けられている。開口部３１０は、第１の通気管路２１０の第１の部分２１０Ａの内側に位置する。【選択図】図３