In modern households there are many different devices people use to accomplish
different domestic chores. The European Union is bound to reducing electricity
consumption and usage of energy efficient devices, due to dependency on limited
energy resources in the EU. The thesis examined the standardized method of air data
verification of vacuum cleaners, which also enables verification of installed vacuum
cleaner motors.
For consumers, the efficiency of vacuum cleaners available on the market held
a secondary role (trends were in favour of the highest suction power and consequently
larger vacuum), but that changed with implementation of Directive 2009/125/EC of
the European Parliament and of the Council with regard to ecodesign requirements for
vacuum cleaners and COMMISSION DELEGATED REGULATION (EU) No
665/2013 of 3 May 2013 supplementing Directive 2010/30/EU of the European
Parliament and of the Council with regard to energy labelling of vacuum cleaners.
The demands that need to be met, as stated in the Directives, are shortly
explained in the introduction. There is a distinction between methods for determination
of energy efficiency classes on different surfaces and average annual energy
consumption of a vacuum cleaner that this thesis does not examine, and the method
for air data verification of vacuum cleaners performance.
In doing so, it is obvious that without an efficient vacuum cleaner / vacuum
cleaner motor, it is not possible to obtain higher energy efficiency classes. In
continuation, the method for vacuum cleaner performance (air data) according to the
demands/requirements of Standard IEC 60312 is presented. The measurement system
for vacuum cleaner performance that was developed in company Domel, is presented
in detail. Since 2016 it has been upgraded according to the newest
demands/requirements of Standard IEC 60312- 1.
With decreasing electric power of vacuum cleaners in order to comply with
higher energy classes, the knowledge of measurement system became more important,
especially the knowledge of effects in measurement of vacuum cleaner efficiency. An
analysis of key weighting factors for vacuum cleaner performance that was used to
determine measurement uncertainties, was prepared.
In automotive industry the established technique of assessment of measurement
system quality is the so-called MSA (Measurment System Analysis), which does have
certain imperfections with sample measurements, when these samples vary during the
process of measurement (in our case fluctuation in electric power). We tested if MSA
is usable with measurements on selected/depicted measurement system.
One of the techniques of verifying the quality of measurement system and
laboratory personnel is also interlaboratory comparison, generally less established at
industrial level.
Findings from executed analyses and comparisons are summed up into
suggestions for improvement of measurement quality. Some improvements have
already been applied (put into action) and some are still to be done. When testing the
features of vacuum cleaner motor, the knowledge of effects during motor operation,
such as fluctuation in electric power, stable area of operation and in production, the
volume of test canisters, is important.
Significant weighting factor on electric power is the newly introduced correction
due to influence low air density at higher altitudes, and it was not taken into account
with procedure of determining the average annual energy consumption of a vacuum
cleaner, and which is depicted at the end of this thesis.
For Domel as a development supplier of motors for vacuum cleaners detailed
knowledge about the motors and vacuum cleaners in a variety of energy efficiency and
functionality testing is important. Quality of measurements proves our competence and
technical skills, which our partners know how to value. The task has been written in
order to evaluate our ability to measure the characteristics of vacuum cleaner motors,
which will help in the ongoing work and also at development of new energy-efficient
solutions.
|
