Ultra-low-energy consumption ultrasonic clothes dryer • Hacker News Board

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#41

Post by derefr » Fri, Apr 21, 2017, 1:56 AM UTC

sandworm101 wrote: post #32

bpicolo wrote: post #23

Earlier quoted context omitted.

Looks like they calculated the optimum as ~500-600 Hz? That's in human hearing range too.

Give it a try: "600 Hz Sine Wave Sound Frequency Tone" https://www.youtube.com/watch?v=ERHcqYNLHyg and 500: https://www.youtube.com/watch?v=GlEfshsoyZk If that really is the range they are targeting, this product is doomed. That will be one heck of a noise to cancel. "Soundproof box" is right up there with perpetual motion, zero-point energy, and spherical chickens in vacuums.

A 'soundproof box' is hard because most of those boxed things we want to quiet down (say, pets) still need to be a part of our environment, breathing air and the like.

A clothes dryer, meanwhile, is a near-ideal case for vacuum isolation + elastic dampening. Build a box with a door; hang an airtight motorized barrel in the box from a bungee cord, with a second door, and electrical connection; and then, whenever both doors are sealed at the same time, [slowly] evacuate the air from the box.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#42

Post by sargun » Fri, Apr 21, 2017, 1:57 AM UTC

spodek wrote: post #7

It's not the fastest clothes dryer, but I often use one that runs on fusion in outer space.

I've heard it has anti bacterial properties as well. Unfortunately, they come at a pigment destroying cost.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#43

Post by kaosjester » Fri, Apr 21, 2017, 1:58 AM UTC

Does this mean the socks won't come out of the dryer warm? That's sort of a deal breaker for me.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#44

Post by sargun » Fri, Apr 21, 2017, 1:58 AM UTC

MrFoof wrote: post #16

Scoundreller wrote: post #4

Earlier quoted context omitted.

And the longevity of your clothes.

This is the main reason. The difference in the longevity of my clothes -- same exact articles, same brand, same material, thickness, size and stitching -- from switching from a "hotbox" dryer to condensation dryer was initially amazing. No more did cuffs and collars start to crack and fail, nor did my shirts slowly develop small tears. The latest (2014 is when they really started to hit the market) heat pump dryers d…

Do they use the cold side of the heat exchanger to drop the moisture out of the air prior to passing it back through for heating?

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#45

Post by [deleted] » Fri, Apr 21, 2017, 1:59 AM UTC

sandworm101 wrote: post #11

And how will my cat react to this thing? Something with enough sonic energy to vaporize a significant volume of water is probably loud enough to wake every animal in the area.

[deleted]

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#46

Post by yourapostasy » Fri, Apr 21, 2017, 2:01 AM UTC

s0rce wrote: post #30

yourapostasy wrote: post #28

Earlier quoted context omitted.

They likely will sonically baffle any outlet for humidity to avoid this issue. I'm curious if the ultraound causes increased wear of the fabric at the thread ends, for example.

Conventional driers also cause significant wear to clothes.

Right, so the question is if the ultrasonic causes more than hotbox dryers, or condensation dryers, or the heat pump dryers.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#47

Post by Nition » Fri, Apr 21, 2017, 2:04 AM UTC

ergothus wrote: post #13

spodek wrote: post #7

It's not the fastest clothes dryer, but I often use one that runs on fusion in outer space.

For apartment goers (or those that live in uncooperative climates) the reliability of such a system is a bigger problem than the speed. But for those that can use it, it is indeed a great system.

One day we'll invent a technology device to answer the age old question: "Still wet or just cold?"

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#48

Post by awqrre » Fri, Apr 21, 2017, 2:06 AM UTC

ergothus wrote: post #12

awqrre wrote: post #5

Earlier quoted context omitted.

Batteries don't last this long, why does a dryer have to? it's not all about longevity ...

Batteries are also (relatively) cheap and easy to replace. If my dryer was $50-$200 and could be carried in one hand, I'd be (grumpily) okay with it only lasting 2 years.

How much does it cost for you to get an iphone battery replaced by Apple ($79)? a basic dryer costs $180 at home depot...

http://www.homedepot.com/p/Magic-Chef-Compact-1-5-cu-ft-Elec...

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#49

Post by ergothus » Fri, Apr 21, 2017, 2:07 AM UTC

jdavis703 wrote: post #18

ergothus wrote: post #13

Earlier quoted context omitted.

For apartment goers (or those that live in uncooperative climates) the reliability of such a system is a bigger problem than the speed. But for those that can use it, it is indeed a great system.

Can you put your clothes on a fire escape? Or in your bathroom (works great if you have a bathroom with a window).

Every apartment complex I've lived in has had rules banning hanging clothes (no idea about enforcement). Also, for any group larger than 2 I imagine the clothes would not dry fast enough to keep up.

And most bathrooms are small and often without a window.

Not a complaint, just pointing out that sun-drying is often not a real choice. Often it is.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#50

Post by awqrre » Fri, Apr 21, 2017, 2:07 AM UTC

rosalinekarr wrote: post #10

awqrre wrote: post #5

Earlier quoted context omitted.

Batteries don't last this long, why does a dryer have to? it's not all about longevity ...

Because dryers are expensive appliances. If they're going to make one that only lasts one tenth as long, it better cost one tenth of the price too.

How much are these new dryers? I didn't see the cost.

also, where did they state the longevity?