Konnichi wa Akihiro!
Tio i Topp was in effect a top 15, although the name means "Top Ten". The five lowest placed songs, 11-15, were knocked out and new candidates tried out for the following week.
Apart from the charst you mention, there is of course the chart on the website, "Topplistan", started In 1975. It shows the best selling singles in Sweden. It still continues to this date, now it shows both CD singles and digital downloads. In 2007, a "rivaling" chart called "Digilistan" (http://www.sr.se/sida/default.aspx?ProgramId=2697)
was introduced, showing only the most downloaded songs of the week.
The most popular radio voting chart has been "Tracks", which started in 1984 as the direct successor to Tio i Topp and Poporama. Tracks is a top 20, with about 15 challengers every week. Website: http://www.sr.se/p3/topplistor/tracks/
To my knowledge, Deep Purple has not had any hits on Tracks.
There is also the classic chart "Svensktoppen", which is only open to Swedish artists, so no Deep Purple there, I'm afraid. ;-)