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Dämpning av fläktljud i diskmaskin
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design.
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design.
2007 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Reduction of fan noise in a dishwasher (English)
Abstract [sv]

Detta examensarbete omfattar akustiska undersökningar utav en desinficerande diskmaskin av typ Getinge 8666/8668 och har utförts på Getinge Desinfection AB i Växjö. Vi har undersökt hur man med enkla medel kan sänka ljudtrycksnivån i maskinens närhet. Mätningar har utförts på diskmaskinens torkprogram, där torkfläktarna är de mest dominerande ljudkällorna och ljudet främst är luftburet. En systematisk analysmetod bestående av införandet av successiva dämpningsåtgärder visade att de dominerande ljudvägarna går via taket, golvet samt till viss del spalter i maskinens väggar. Genom att isolera både tak, golv och spalter kunde ljudtrycksnivån sänkas med totalt hela 5,9 dB. Med enkla produktionsanpassade lösningar, i form utav en isolerad golvsockel och en bättre kåpa runt fläktarna, kan man sänka nivån med så mycket som 3,6 dB. Rapporten ska även kunna användas som ett underlag för vidare akustiska undersökningar på Getinge Desinfection AB.

Abstract [en]

This dissertation examines acoustic research of a disinfecting dishwasher type Getinge 8666/8668. The research has been performed in collaboration with Getinge Desinfection AB, a world wide known manufacturer of disinfecting equipment for healthcare, located in Växjö, Sweden. We have examined how to reduce noise from the dishwasher with simple measures. Measurements have been performed during the drying program of the machine. The drying fans are the dominating sources of sound, and the sound is air bourn. A systematic method by reducing the sound step by step shows that the major ways of sound is through the ceiling and through the floor. There is also a minor noise leakage through the gaps in the walls of the dishwasher. By isolating the ceiling, the floor and the gaps in the walls, it is possible to reduce the noise with totally 5.9 dB. With more production adapted solutions, in shape of an isolated floor base and a more efficient fan cover, it is possible to reduce the noise with as much as 3.6 dB. This dissertation is thought to be used as a basis for further acoustic research at Getinge Desinfection AB.

Place, publisher, year, edition, pages
2007. , p. 37
Series
Reports from Växjö University: Mathematics, natural sciences and technology, ISSN 1404-045X ; TD040/2007
Keywords [en]
Acoustics, Getinge Desinfection AB, dishwasher, sound, noise reduction
Keywords [sv]
Akustik, Getinge Desinfection AB, diskmaskin, ljud, ljuddämpning
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:vxu:diva-1528OAI: oai:DiVA.org:vxu-1528DiVA, id: diva2:205350
Uppsok
teknik
Supervisors
Examiners
Available from: 2007-08-22 Created: 2007-08-22 Last updated: 2010-03-10Bibliographically approved

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CiteExportLink to record
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