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Investigation and Further Development of the Spray Arm in a Dishwasher

Teskera, Ivana LU (2015) MMK820 20132
Product Development
Abstract
This report is the result of a master thesis project conducted at the Global R&D Dish Care Department at Electrolux, Stockholm. The master thesis has been carried out through the Division of Machine Design, Department of Design Sciences at the Faculty of Engineering (LTH), Lund University.

Electrolux is a developer and producer of household appliances active on the global market. Their focus is on design innovations based on extensive consumer insights, to meet the real needs of customers and professionals. The master thesis is part of the development of a new commercially viable dishwasher for the future. The objective of the project was to evaluate the existing prototypes, test and analyze the dishwashers to get valuable information... (More)
This report is the result of a master thesis project conducted at the Global R&D Dish Care Department at Electrolux, Stockholm. The master thesis has been carried out through the Division of Machine Design, Department of Design Sciences at the Faculty of Engineering (LTH), Lund University.

Electrolux is a developer and producer of household appliances active on the global market. Their focus is on design innovations based on extensive consumer insights, to meet the real needs of customers and professionals. The master thesis is part of the development of a new commercially viable dishwasher for the future. The objective of the project was to evaluate the existing prototypes, test and analyze the dishwashers to get valuable information for further development. The main focus was on improving the robustness of the spray arm and evaluating the applicability of a new theory compiled at Electrolux, describing how the performance can be improved by redesign of the spray arm nozzles.

The master thesis was an experimental study including an iterative process to find the optimal design that solves the existing issues and increases the robustness of the spray arm. The project resulted in a deeper understanding of the spray system in the dishwasher. Issues causing irregular performance were found and redesigns of the nozzles were tested to confirm the applicability of the new theory on this system. A final design was developed; it included changes of the nozzle design, rotation speed and weight of the spray arm. This final design met the requirements for the robustness but did not achieve the required cleaning performance for the product. Further recommendations are to investigate the possibilities of finding a pump more powerful and more suitable for the system or to redesign the spray arm to better meet the requirements of both the robustness and cleaning performance. (Less)
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author
Teskera, Ivana LU
supervisor
organization
course
MMK820 20132
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Electrolux, Dishwasher, Performance, Spray arm, Experimental study
other publication id
ISRN LUTMDN/TMKT 15/5488 SE
language
English
id
8303055
date added to LUP
2015-12-08 13:21:11
date last changed
2015-12-08 13:21:11
@misc{8303055,
  abstract     = {This report is the result of a master thesis project conducted at the Global R&D Dish Care Department at Electrolux, Stockholm. The master thesis has been carried out through the Division of Machine Design, Department of Design Sciences at the Faculty of Engineering (LTH), Lund University.

Electrolux is a developer and producer of household appliances active on the global market. Their focus is on design innovations based on extensive consumer insights, to meet the real needs of customers and professionals. The master thesis is part of the development of a new commercially viable dishwasher for the future. The objective of the project was to evaluate the existing prototypes, test and analyze the dishwashers to get valuable information for further development. The main focus was on improving the robustness of the spray arm and evaluating the applicability of a new theory compiled at Electrolux, describing how the performance can be improved by redesign of the spray arm nozzles. 

The master thesis was an experimental study including an iterative process to find the optimal design that solves the existing issues and increases the robustness of the spray arm. The project resulted in a deeper understanding of the spray system in the dishwasher. Issues causing irregular performance were found and redesigns of the nozzles were tested to confirm the applicability of the new theory on this system. A final design was developed; it included changes of the nozzle design, rotation speed and weight of the spray arm. This final design met the requirements for the robustness but did not achieve the required cleaning performance for the product. Further recommendations are to investigate the possibilities of finding a pump more powerful and more suitable for the system or to redesign the spray arm to better meet the requirements of both the robustness and cleaning performance.},
  author       = {Teskera, Ivana},
  keyword      = {Electrolux,Dishwasher,Performance,Spray arm,Experimental study},
  language     = {eng},
  note         = {Student Paper},
  title        = {Investigation and Further Development of the Spray Arm in a Dishwasher},
  year         = {2015},
}