JP5089537B2 - 電動送風機の故障診断装置及びそれを搭載した電気機器 - Google Patents
電動送風機の故障診断装置及びそれを搭載した電気機器 Download PDFInfo
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Description
実施の形態1.
図1は、本発明の実施の形態1に係る故障診断装置50の基本的な構成を示す概略図である。図1に基づいて、電動送風機の故障診断を実行する故障診断装置50の基本的な構成について説明する。なお、図1に図示する電動送風機100は、遠心型の電動送風機であり、たとえば電気掃除機やジェットタオル等の電気機器に搭載されるものである。また、図1を含め、以下の図面では各構成部材の大きさの関係が実際のものとは異なる場合がある。
図10は、本発明の実施の形態2に係る電気機器の一例である電気掃除機150の全体構成を示す概略図である。図11は、振動検出装置40を設置した電気掃除機150の内部構成を示す概略構成図である。図12は、騒音検出装置45を設置した電気掃除機150の内部構成を示す概略構成図である。図10〜図12に基づいて、電気機器の一例としての電気掃除機150について説明する。この電気掃除機150には、実施の形態1で説明した遠心型の電動送風機100が設置されている。そして、電気掃除機150に実施の形態1に係る故障診断装置50を搭載することで、故障検知及び故障モード判定を実行でき、安全性を向上させたものになっている。
電気掃除機150の図示省略の電源スイッチがONされると、電動送風機100が駆動され、床面等の塵埃が吸い込みブラシにより空気とともに吸引され、集塵室151に吸い込まれる。この電動送風機100は、高速回転しており、回転に伴って振動が発生する。この電動送風機100は、筐体153内でファンケース152によって支持されている。電動送風機100には、実施の形態1で説明した振動検出装置40が設置されており、発生した振動の情報が電源基板157に送られるようになっている。電源基板157に送られた振動情報は、実施の形態1で説明したような処理によって電動送風機100の故障検知及び故障モード判定に利用される。
Claims (9)
- 電動送風機から発生する振動及び騒音の少なくとも1つを検出する検出装置と、
前記検出装置で検出された振動及び騒音の少なくとも1つの周波数成分のうち電源成分2fを、正常な電動送風機に特有の周波数成分である電源成分2fと比較し、電源成分2fの周波数に変化が生じていると判断した場合、前記電動送風機にブロア固定具の故障が発生していると判定する制御手段と、を有する
ことを特徴とする電動送風機の故障診断装置。 - 電動送風機から発生する振動及び騒音の少なくとも1つを検出する検出装置と、
前記検出装置で検出された振動及び騒音の少なくとも1つの周波数成分のうち回転成分nを、正常な電動送風機に特有の周波数成分である回転成分nと比較し、回転成分nの周波数に変化が生じていると判断した場合、前記電動送風機に電動機の不良故障が発生していると判定する制御手段と、を有する
ことを特徴とする電動送風機の故障診断装置。 - 電動送風機から発生する振動及び騒音の少なくとも1つを検出する検出装置と、
前記検出装置で検出された振動及び騒音の少なくとも1つの周波数成分のうち羽通過成分nZを、正常な電動送風機に特有の周波数成分である羽通過成分nZと比較し、羽通過成分nZの周波数に変化が生じていると判断した場合、前記電動送風機のファンブレードに故障が発生していると判定する制御手段と、を有する
ことを特徴とする電動送風機の故障診断装置。 - 電動送風機から発生する振動及び騒音の少なくとも1つを検出する検出装置と、
前記検出装置で検出された振動及び騒音の少なくとも1つの周波数成分のうち転動体成分nRを、正常な電動送風機に特有の周波数成分である転動体成分nRと比較し、転動体成分nRの周波数に変化が生じていると判断した場合、前記電動送風機の軸受けに故障が発生していると判定する制御手段と、を有する
ことを特徴とする電動送風機の故障診断装置。 - 電動送風機から発生する振動及び騒音の少なくとも1つを検出する検出装置と、
前記検出装置で検出された振動及び騒音の少なくとも1つの周波数成分のうち1kHz以上の平均成分を、正常な電動送風機に特有の周波数成分である1kHz以上の平均成分と比較し、2〜3kHz平均成分の周波数に変化が生じていると判断した場合、前記電動送風機により吸引される空気の風路に故障が発生していると判定する制御手段と、を有する
ことを特徴とする電動送風機の故障診断装置。 - 前記制御手段は、
前記検出装置で検出された振動及び騒音の少なくとも1つの周波数成分を、正常な電動送風機に特有の周波数成分の最大値、最小値あるいは最小値から最大値に至るまでの間の変動量と比較することで前記電動送風機の故障検知を実行する
ことを特徴とする請求項1〜5のいずれか一項に記載の電動送風機の故障診断装置。 - 振動を検出する前記検出装置を、
前記特有な周波数成分の振動方向を検出軸とする位置に設ける
ことを特徴とする請求項1〜6のいずれか一項に記載の電動送風機の故障診断装置。 - 騒音を検出する前記検出装置を、
騒音が伝播する経路に設ける
ことを特徴とする請求項1〜6のいずれか一項に記載の電動送風機の故障診断装置。 - 前記請求項1〜8のいずれか一項に記載の電動送風機の故障診断装置を搭載した
ことを特徴とする電気機器。
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