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Corona virus killing robot

Robot has a UV light to kill virus and germs in wet tile grout
  [vote for,

Coronavirus killing ultraviolet light equipped floor robot kills germs in grout and on floor and also has moving brushes that clean dirt from tiles and grout.

Alcohol or other germ killers would spray ahead of the robot to kill wet, germ-rich dirty grout, Brush will clean dirt filled grout.

Sunstone, Mar 17 2020


       Is wet grout known to harbor germs especially? Do other methods of disinfection not work well on it?   

       Vacuum-cleaning robots with built-in UV lamps that shine on the floor are baked, but probably not WKTE, because they're impractical and therefore uncommon. UV requires a long exposure time to disinfect, which is not provided by a robot that's moving along. Also, in those existing robots, the lamp was about an inch wide, while the robot was maybe 12 inches wide, so only 1/12 of the floor got any UV, let alone enough exposure to be worthwhile.   

       (I had been envisioning a UV lamp hung on four ropes attached to computer-controlled winches at the corners of the workshop, to move around automatically when the shop was unoccupied, until I looked it up and learned that it would probably take a week (just a guess) to do a cursory pass of the whole workshop with the little UV lamp I have, if I wanted enough exposure time on any given surface to do much good.)   

       You could use a mopping or floor-washing robot, and fill it with 70% alcohol or another disinfectant liquid. Alcohol might evaporate too quickly even at 70%. According to the EPA's list, quaternary ammonium compounds seem to be good against SARS-CoV-2. Sodium hypochlorite (household bleach) too, IIRC.   

       What might work better is an ozone-floor-treating robot. Ozone should get into the grout nicely. The trouble with using ozone for general disinfection is that it's ineffective in doses that aren't also effective against humans. But, with a robot, you could equip the robot with a skirt and keep the ozone under the robot, in a much higher concentration. And if the ozone does escape, the volume will be small, so it will be diluted in the full volume of the room to a safe concentration.
notexactly, Mar 20 2020

       // The trouble with ozone for disinfection is that it's ineffective in doses that aren't also effective against humans. //   

       3PPM is more than enough for disinfection. OSHA gets nervous if more than 0.1PPM is in the air people are breathing.   

       Now consider a crawler with emitters 1/2" above the floor and a flexible skirting to hold ozone into the area until the machine moves on. It pumps 3PPM into that space. After it moves away the ozone mixes with the much larger volume of room air and drops to an acceptable concentration.   

       Just keep your dogs and toddlers out of the treated area for a while. Anything with nose and eyes less than 2 feet from the floor might get uncomfortable.
Chairborne Hero, Mar 20 2020

       Thanks for doing half of the math on the mitigation strategy I proposed. I did none.
notexactly, Mar 20 2020

       // the mitigation strategy I proposed //   

       Funny! I only skimmed your earlier post and started typing up my reply on how to deal with ozone - I didn't read through to see you had suggested the exact same thing.   

       I have an ozone generator in the cabinet under the kitchen sink. It does seem to keep odours down - but I may be imagining that.
Chairborne Hero, Mar 20 2020

       You have an imaginary kitchen ?   

       If your imagination is vivid enough to actually allow you to prepare and cook food, it's a really good idea.
8th of 7, Mar 20 2020

       //You have an imaginary kitchen ?//   

       To be fair, its a problem with cheap induction hobs that have a less than ideal power factor. At least some of the food cooked is imaginary.
bigsleep, Mar 20 2020

       You'd be fine if you only cooked carrots, parsnips, swede and turnips after dicing them into symmetrical rectilinear portions, thus deriving the Cubed Root vegetables of unity...   

       Just leave the imaginary part on the side if your plate if you don't like it.
8th of 7, Mar 21 2020

       So not an army of Maxwell demons with UV powered chainsaws.
wjt, Mar 22 2020


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