The question Why did Apollo spacecraft use both AC and DC equipment? Still used in present and future designs? and especially the answer there reminded me of something I'd seen in the YouTube video One of the Most Detailed ISS Tour which also accompanied the question How do iPads on the ISS know which way is “up” for their users?.
03:40 in the video, astronaut Steven Swanson introduces with a bit of humor the stowed, and presumably new, AC version of the vacuum cleaner used on the ISS:
We do have one of the most important pieces of equipment on the International Space Station hidden up here. This is the vacuum cleaner, and it’s the AC version. And we say in NASA-talk that this is the only piece of equipment that doesn’t suck on the International Space Station. But this is actually much better than the old one, so we actually like it, and it’s nothing too fancy, just a vacuum cleaner, and we have to use it every week to keep the place clean.
Was there an earlier DC version of the vacuum cleaner? If so, what is the reason for the "upgrade"?
I'm also curious, are there standard type A or B wall sockets distributed around the ISS to plug things in to 120 VAC?
above: Type A & B wall sockets. (am I the only one experiencing mild Pareidolia here?)