AIR BLOWER

• Main Authors: WATANABE SHIGEHIRO, ABE RYUJI, HADO MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2017
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

PROBLEM TO BE SOLVED: To provide a structure capable of effectively reducing an area of a gap that may cause gas leakage from a first casing to a second casing in an air blower for sucking and discharging different types of gases by using a first impeller and a second impeller.SOLUTION: An air blower 1 includes: a first impeller 10; a second impeller 20; a first casing 50 having a first suction port 51 and a first discharge port 52 for an inflammable gas mixture and forming a first accommodation space 100 for accommodating the first impeller 10; a second casing 70 having a second suction port 71 and a second discharge port 72 for combustion air and forming a second accommodation space 200 that accommodates the second impeller 20 and has inner pressure set higher than that of the first accommodation space 100; and an isolation wall 60 for isolating the first accommodation space 100 and the second accommodation space 200 from each other while forming gaps 80 with respect to peripheral surfaces of a first boss portion 11 of the first impeller 10 and a second boss portion 21 of the second impeller 20.SELECTED DRAWING: Figure 2 【課題】第１インペラ及び第２インペラによって異なる種類のガスを吸引吐出する送風機において、第１ケーシングから第２ケーシングへのガス漏れの原因となる隙間の面積を効果的に低減できる構造を提供すること。【解決手段】送風機１は、第１インペラ１０と、第２インペラ２０と、可燃性の混合ガスの第１吸込口５１及び第１吐出口５２が設けられ、第１インペラ１０を収容する第１収容空間１００を形成する第１ケーシング５０と、燃焼用空気の第２吸込口７１及び第２吐出口７２が設けられ、第２インペラ２０を収容するとともに第１収容空間１００よりも内圧が高く設定される第２収容空間２００を形成する第２ケーシング７０と、第１インペラ１０の第１ボス部１１及び第２インペラ２０の第２ボス部２１の周面との間に隙間８０を形成しつつ、第１収容空間１００と第２収容空間２００を隔離する隔離壁６０と、を備える。【選択図】図２