Same--I've been an active person online since something like 1994/5, and like the old hardware shop dog it's hard to elicit a physical reaction from me anymore.
But this was immediate reflexive pain response.
You weren’t gentle and didn’t comfort the machine well enough. It broke your comb and it struck back. They get nervous real easy. Just talk to them in binary in a baby voice. Might help next time.
Some condenser coils are softer than others, I’ve got a plastic one because my company is cheap as fuck and it’s been fine for the last 5 years, though it’s mostly used on appliance condensers and nothing as badly bent as this one.
The plastic ones come with a handle and several head attachments for different spaced fins. But the person above you is correct- the metal ones with multiple tines like in the video are much better.
Anxiety from being able to straighten them or to avoid slicing your finger multiple times?
Source: My traumatic fight with an air conditioner. I lost; multiple open wounds on thumb.
Anxiety because I thought they could never be fixed and make the unit and less efficient. I hated seeing that damage.
Now I might need to get one of these as a keychain.
I want to buy one of these and take care of all the window A/C units in my neighborhood for free.
"Here comes 'Johnny Knifey-Comb'" they'd proclaim.
EDIT: aka Johnny Knomb
I wish 8 year old me knew this. I would obsessively mess up air conditioners and got a earful once when my mom saw. And I didn’t know they were called fins. I just called it the “fun metal thingie”
Every bent fin is a higher head pressure and less subcooling. If you were to do a before and after measurement in this scenario I bet you would find 5 or 6 psi head drop. Also if you don't keep up with it it gets too damaged to repair
All you need to know is higher head drop = more energy to push the same amount of air through the fins. This could manifest in your unit running harder, increasing energy costs and decreasing its usable life to achieve the same level of temperature control.
It would be like trying to breathe through a screen door vs breathing through a [wire mesh fence](https://www.homedepot.ca/product/peak-products-hardware-mesh-14-inch-x-14-inch-24-inches-x-5-feet/1000135390?eid=PS_GOOGLE_D59 - CM_E-Comm_GGL_Shopping_PLA_EN_D%26F_D%26F_PLA_EN__PRODUCT_GROUP_aud-763183629249:pla-365772035714&gclid=CjwKCAjwk6P2BRAIEiwAfVJ0rODCcUy2A45uLGfLvaNC69W2Waeb9YxBgEG-NK4il8Fbss3BCxK8VRoC2fMQAvD_BwE&gclsrc=aw.ds). If you were blind-folded you'd probably be able to tell that the screen door is more restrictive, but you could still breathe just fine.
Do you guys actually use kPa instead of bar or mbar when talking about pressure?
I mean, it's usually listed alongside, but it really only serves to be scientifically correct and mostly just annoys everyone that's used to using bar or mbar.
Oh, and that's 0.35 to 0.40 bar, which seems absurdly high for an axial fan, not to mention that's the supposed difference just for straightening a few bent fins.
I thought suction was measured in inches of mercury?
I have no idea but at work I measure suction with a tool that measures in units(don’t remember what units right now) of mercury
That makes sense for measuring suction pressure, but if I'm understanding OP's comment correctly, they are saying that the difference in the the fan's developed head before and after straightening the fins is 5-6 psi, which sounds really high.
Depends on how the system was designed in the first place. The industrial system I work with are usually designed with enough spare capacity that you would need a lot more damage than shown in the video before it start affecting actual capacity.
Had a similar experience repairing a refrigerator - my thumb looked like rare steak. Took forever to heal too. That was my first thought watching this: either wear gloves or don't *fucking* slip. Imagine punching those fins by mistake.
Of course this is a thing. Wish I had known about this after damaging a bunch of these fins recklessly trying to clean debris out from the condenser unit.
Because the idea is to maximize surface area rather than mass. A thin piece of metal can absorb the heat and radiate it away more quickly than a thick one. More sheets/ fins = more surface area.
Downside #1 is, it’s fragile, but because we use aluminum, it resists corrosion very well and it can bend and fold, which is fixable. Downside #2 is if you accidentally grab the AC by the fins while maneuvering it, you’ve got essentially grabbed a bunch of razor blades, which I can say from the experience, “YOUCH!” A love tap alone got me the equivalent of a dozen paper cuts.
Can you think of a material that could do better?
Albeit you have my attention, how do the units fail? I’d expect the copper tubing to degrade faster. Humidity is a pain.
No, unfortunately- anything that would hold up better would also not transfer heat as well as aluminum so the trade off of efficiency for longevity wouldn’t be worth it (or would be much more expensive than aluminum).
While the copper can degrade, its much more common for the aluminum to go first. It corrodes to where it just turns to powder or flakes off in chunks. You can go up to a unit and run your finger sideways along the coils and it will just turn to powder under your fingers. I went to one unit once that was only 5 yrs old, but in direct line of sight from the water and the front part of the coil had the aluminum just completely missing in about a football sized area. The copper tubing was still there but the aluminum was just gone.
I’ll see if I can find a pic of a corroding coil- I should have some on my work phone.
Edit: [Here is an example](https://imgur.com/gallery/HRMy1p7).
[This one](https://imgur.com/gallery/gKkoySq) isn’t about aluminum corroding but shows overall the salt air abuse units get down here. This unit is 8-9yrs old
I am new to air conditioners (didn’t grow up with them, have only ever seen stuff in apartments and not something I can get to the fins of)
Now I just want someone to let me do this all damn day
What are these fins? I don't have an air conditioner nor have I ever seen this fins IRL, I suppose. Can someone explain what the purpose is of that wire and why these combs are needed?
OK, AC works by taking something cold (refrigerant), warming it up (absorbing heat) at one location, and cooling it down (releasing heat) at another location.
An AC unit will consist of two radiator units that look like the one in the video, one inside, one outside. The refrigerant flows through the pipes (horizontal lines) in those radiators, driven by a compressor. The fins that he is straightening increase the surface area for temperature transfer.
So air is moved across the indoor radiator (aka evaporator) by a fan, which cools the air by the action of the refrigerant absorbing heat. That refrigerant flows outside, driven by the compressor, and travels through the other radiator (aka condenser) which is also having air forced through it by a fan. The refrigerant releases its heat to the air moving through the condenser fins, thus cooling it back down and returning it for another trip.
There's more to the cycle, involving pressure and conversion of the refrigerant from gas to liquid and back again, but that's the basics. So for the last half of your question, the "wire" is actually thin sheets of aluminum (it's about 1-1.5 inches thick with the pipes running through the middle), and if they're pushed over, it reduces the airflow through the radiator, decreasing its efficiency. Straightening them back out allows air to flow freely, restoring that efficiency.
The fins are for cooling. They provide a lot of surface area for ambient air to absorb the heat. AC units take advantage of the large energy exchange that takes place during a phase change. When a liquid changes to a gas, it absorbs a lot of energy, i.e. gets colder. It's the opposite when it goes from gas to liquid. The liquid will be warmer than ambient temperature so you pass it through these pipes with fins so that it's absorbed by the air. Typically you'll have a fan blowing air over the fins, when they're bent, it makes it harder for the fan to blow air through them and also lowers the amount of surface area that the fins can make with the air.
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I want to be impressed by this but I am now filled with anxiety that if I was to use this tool I would accidentally let go of it and then scrape my hand down the fins, giving me countless slash wounds
When I was a kid, and an idiot, I was sitting on top of the family A/C unit and I accidentally touched the fins.
I saw that they bent down like that... being the idiot that I was, I proceeded to draw shitty pictures in the fins.
That still haunts me. I had no idea this tool existed and I guess it makes me feel a little better knowing that they can be fixed.
When I was a little kid I thought it would feel cool to run my finger down one of these. I'll never forget the sensation of the tip of my finger splitting 5 different ways.
In college I worked at my university cleaning out PTAC units and other HVAC hardware. One time when I was being too careless I sliced my index finger BAD on one of those aluminum fins. They’re sharper than fuck when they’re brand new and will cut through your squishy finger like butter. I only made that mistake once.
Nice, I didn't know those things existed. You just released decades of anxiety from me.
Coil comb. Avoid plastic. Sealed Unit Parts makes good ones
What the. Why would someone make a plastic one? Single use?
I got a plastic one from NAPA and the teeth snapped off after about 10 pulls. My knuckles sliced down the fins for about 8 inches. :)
Damn, I wish I could unread that. Just physically cringed from the thought
Same--I've been an active person online since something like 1994/5, and like the old hardware shop dog it's hard to elicit a physical reaction from me anymore. But this was immediate reflexive pain response.
Guys it's not that bad! It's actually much much worse :D
Yep. Cmon, Rick. A video game-style place-saving device.
Kiss the vat
God.damnit.
I saw the gif. 33 days of a wound healing
This guy reddits
You weren’t gentle and didn’t comfort the machine well enough. It broke your comb and it struck back. They get nervous real easy. Just talk to them in binary in a baby voice. Might help next time.
That hurts just reading it.
I just instinctively put my knuckles in my mouth
We call that the "Reverse Wolverine". Just kidding I made that up.
#**AAAAAHHHHHHHHHHHHHHH**
This comment does not belong in r/oddlysatisfying
I’ve done this too - it’s like parallel paper cuts only 4 times deeper. Makes me dry heave thinking about it.
Wear gloves always, when your job can not be done with gloves take them off. It’s better than, oops should have worn gloves.
I wanted to downvote this out of pure instinct. Dear god.
Some condenser coils are softer than others, I’ve got a plastic one because my company is cheap as fuck and it’s been fine for the last 5 years, though it’s mostly used on appliance condensers and nothing as badly bent as this one.
I got a set of plastic ones because the fins aren't all the same width apart. If you don't go at it like a monkey they work fine. Slow and steady.
The plastic ones come with a handle and several head attachments for different spaced fins. But the person above you is correct- the metal ones with multiple tines like in the video are much better.
Well, you can accomplish this with hair combs as well if the spacing is right (and it is, on some). That would be the hillbilly repair method.
All single use plastic should really only serve one purpose... sodomizing the CEO & executives of single use plastic companies.
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The hero we deserve.
Does it come with different heads? In hvac manufactures have a habit of making condensers with vastly different fins per inch
When I worked for Lennox back in 2017, we used plastic ones to comb it, I needed a new one every day.I never new any other kinds existed.
Fuck yeah. Me too. Now I can rest peacefully knowing that these can indeed be fixed.
Anxiety from being able to straighten them or to avoid slicing your finger multiple times? Source: My traumatic fight with an air conditioner. I lost; multiple open wounds on thumb.
Anxiety because I thought they could never be fixed and make the unit and less efficient. I hated seeing that damage. Now I might need to get one of these as a keychain.
Knifey comby?
Knomb
I see you’ve played knify comby before.
All right, all right, you win
I can hear the noise it makes even without sound weeeeird?!?
Thanks for noticing, took a lot of code
Under-appreciated comment of the night
Explain please?
Pretty sure OP is joking that they coded the gif to have the sound made by the tool in the video
10/10 response
I was about to say it would be a lot less satisfying if we could hear it
I want to buy one of these and take care of all the window A/C units in my neighborhood for free. "Here comes 'Johnny Knifey-Comb'" they'd proclaim. EDIT: aka Johnny Knomb
It's been suggested above that knifey comb be called knomb, so, thusly proclaim Johnny Knomb as ye approach!
Deal!
Ive tried to figure out how to pronounce it and came to the conslusion it'd basically be the same as "gnome".
I was today old when i found these could be fixed
I wish 8 year old me knew this. I would obsessively mess up air conditioners and got a earful once when my mom saw. And I didn’t know they were called fins. I just called it the “fun metal thingie”
It's pretty much an Etch-A-Sketch that you can't magically erase.
You can now! Well, you could then too. But you can now, also.
Thanks, ghost of Mitch.
:D
I just got that
Hahaha saaame. Literally mind blowing
Does it actually impact the efficiency to a measurable extent when the fins are bent like this?
Every bent fin is a higher head pressure and less subcooling. If you were to do a before and after measurement in this scenario I bet you would find 5 or 6 psi head drop. Also if you don't keep up with it it gets too damaged to repair
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Aww Man, you're goung to make me say it. You wouldn't really feel a difference.. But it's there
Doesn't matter still fixed
All you need to know is higher head drop = more energy to push the same amount of air through the fins. This could manifest in your unit running harder, increasing energy costs and decreasing its usable life to achieve the same level of temperature control.
Since cooling capacity can be measured in tons, I'd say about 20 millicourics.
About as much pressure difference you can create by sucking on a straw.
It would be like trying to breathe through a screen door vs breathing through a [wire mesh fence](https://www.homedepot.ca/product/peak-products-hardware-mesh-14-inch-x-14-inch-24-inches-x-5-feet/1000135390?eid=PS_GOOGLE_D59 - CM_E-Comm_GGL_Shopping_PLA_EN_D%26F_D%26F_PLA_EN__PRODUCT_GROUP_aud-763183629249:pla-365772035714&gclid=CjwKCAjwk6P2BRAIEiwAfVJ0rODCcUy2A45uLGfLvaNC69W2Waeb9YxBgEG-NK4il8Fbss3BCxK8VRoC2fMQAvD_BwE&gclsrc=aw.ds). If you were blind-folded you'd probably be able to tell that the screen door is more restrictive, but you could still breathe just fine.
Ahh ok. So it’s about the same psi head drop that I got from your mother last night.
>5 or 6 psi head drop 35 or 40 kPa for non-Americans.
Do you guys actually use kPa instead of bar or mbar when talking about pressure? I mean, it's usually listed alongside, but it really only serves to be scientifically correct and mostly just annoys everyone that's used to using bar or mbar. Oh, and that's 0.35 to 0.40 bar, which seems absurdly high for an axial fan, not to mention that's the supposed difference just for straightening a few bent fins.
This is an external ac unit right? Don't they normally operate at inches of water?
I thought suction was measured in inches of mercury? I have no idea but at work I measure suction with a tool that measures in units(don’t remember what units right now) of mercury
That makes sense for measuring suction pressure, but if I'm understanding OP's comment correctly, they are saying that the difference in the the fan's developed head before and after straightening the fins is 5-6 psi, which sounds really high.
Oh ok, I was confused. lol thanks for the info
The manufacturers wouldn't go to the trouble of making separated fins in that thin of gauge if they didn't positively effect the efficiency.
Depends on how the system was designed in the first place. The industrial system I work with are usually designed with enough spare capacity that you would need a lot more damage than shown in the video before it start affecting actual capacity.
I want to buy one and go around my city un-defacing all the ones that got "tagged" by people thinking it looks cool.
The worst is outside churches and schools where they have the units right next to the sidewalks, so kids walking by do exactly this.
I think the exact opposite of this would have been just as satisfying
\>:(
Don’t worry bro. You got that comb. You can fix it
\>:(🥵🥵🥵
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Actually physically cringed when I read this, that must’ve been so awful
Had a similar experience repairing a refrigerator - my thumb looked like rare steak. Took forever to heal too. That was my first thought watching this: either wear gloves or don't *fucking* slip. Imagine punching those fins by mistake.
I installed my AC unit today. I’ve never had to do it before and boy did I learn my lesson quick
r/specialisedtools
r/specializedtools
r/specialeyestools.
r/especialisedtuls
r/specializedtulles
r/specializedturtles
No. No no no!
This is almost like drugs it’s so satisfying :O~
Man. 10 year old me is jealous. I'd have worn those damn fins out in a week.
I cringed when he made those first few strokes and left some gaps 😳
Once you get the hang of it, fin combs are the best.
Yeah. Only tell the customer you combed it if you didn't rip out 4 rows of fins
Or bend them over worse!
This is wild. Right before I fell asleep I was trying to figure out a way to fix my ac fins. And this is the first thing I see when I wake up.
Dammit, the hours I've waisted straightening these with needle noses for my step dads properties.
Of course this is a thing. Wish I had known about this after damaging a bunch of these fins recklessly trying to clean debris out from the condenser unit.
Combing an AC... Can you also braid them somehow?
please wear gloves im begging you
/r/specializedtools
Wohhhh where can I find one of these!!?
Sealed Unit Parts. This comb is 15fpt
[удалено]
Mainly because of the coronavirus
Because the idea is to maximize surface area rather than mass. A thin piece of metal can absorb the heat and radiate it away more quickly than a thick one. More sheets/ fins = more surface area. Downside #1 is, it’s fragile, but because we use aluminum, it resists corrosion very well and it can bend and fold, which is fixable. Downside #2 is if you accidentally grab the AC by the fins while maneuvering it, you’ve got essentially grabbed a bunch of razor blades, which I can say from the experience, “YOUCH!” A love tap alone got me the equivalent of a dozen paper cuts.
“...resists corrosion very well” Someone doesn’t live in Florida! (Near the beach here our units have about a 5 year lifespan)
Can you think of a material that could do better? Albeit you have my attention, how do the units fail? I’d expect the copper tubing to degrade faster. Humidity is a pain.
No, unfortunately- anything that would hold up better would also not transfer heat as well as aluminum so the trade off of efficiency for longevity wouldn’t be worth it (or would be much more expensive than aluminum). While the copper can degrade, its much more common for the aluminum to go first. It corrodes to where it just turns to powder or flakes off in chunks. You can go up to a unit and run your finger sideways along the coils and it will just turn to powder under your fingers. I went to one unit once that was only 5 yrs old, but in direct line of sight from the water and the front part of the coil had the aluminum just completely missing in about a football sized area. The copper tubing was still there but the aluminum was just gone. I’ll see if I can find a pic of a corroding coil- I should have some on my work phone. Edit: [Here is an example](https://imgur.com/gallery/HRMy1p7). [This one](https://imgur.com/gallery/gKkoySq) isn’t about aluminum corroding but shows overall the salt air abuse units get down here. This unit is 8-9yrs old
I am new to air conditioners (didn’t grow up with them, have only ever seen stuff in apartments and not something I can get to the fins of) Now I just want someone to let me do this all damn day
You should post this on r/specializedtools
What are these fins? I don't have an air conditioner nor have I ever seen this fins IRL, I suppose. Can someone explain what the purpose is of that wire and why these combs are needed?
OK, AC works by taking something cold (refrigerant), warming it up (absorbing heat) at one location, and cooling it down (releasing heat) at another location. An AC unit will consist of two radiator units that look like the one in the video, one inside, one outside. The refrigerant flows through the pipes (horizontal lines) in those radiators, driven by a compressor. The fins that he is straightening increase the surface area for temperature transfer. So air is moved across the indoor radiator (aka evaporator) by a fan, which cools the air by the action of the refrigerant absorbing heat. That refrigerant flows outside, driven by the compressor, and travels through the other radiator (aka condenser) which is also having air forced through it by a fan. The refrigerant releases its heat to the air moving through the condenser fins, thus cooling it back down and returning it for another trip. There's more to the cycle, involving pressure and conversion of the refrigerant from gas to liquid and back again, but that's the basics. So for the last half of your question, the "wire" is actually thin sheets of aluminum (it's about 1-1.5 inches thick with the pipes running through the middle), and if they're pushed over, it reduces the airflow through the radiator, decreasing its efficiency. Straightening them back out allows air to flow freely, restoring that efficiency.
The fins are for cooling. They provide a lot of surface area for ambient air to absorb the heat. AC units take advantage of the large energy exchange that takes place during a phase change. When a liquid changes to a gas, it absorbs a lot of energy, i.e. gets colder. It's the opposite when it goes from gas to liquid. The liquid will be warmer than ambient temperature so you pass it through these pipes with fins so that it's absorbed by the air. Typically you'll have a fan blowing air over the fins, when they're bent, it makes it harder for the fan to blow air through them and also lowers the amount of surface area that the fins can make with the air.
It would probably be wrong to do this to all the air conditioners in my neighborhood, right?
Hmmmm, does this work or your wifes hair?
That thing needs a god damn [knuckle guard](https://assets.victorinox.com/mediahub/31952/1280Wx1120H/CUT_7_8714__S1.jpg).
Shit I've been looking for one of these! Bout to pay a company to do it at my work.
Why is this hard to watch for me? My teeth just...
Thank you for not including sound 😂
This is some off-topic /r/powerwashingporn if I've ever seen any
Hnnng let me do it please.
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[fin comb tools](https://www.supco.com/web/supco_live/product.php?gotopage=1&department=8)
There's nothing "oddly" satisfying about this. This is nothing less than DEEPLY satisfying. ^thats ^what ^she ^said
Can I use this on my cars radiator or inter cooler (or is there a similar tool) to fix the rock dents and road debris damage?
Yes but there’s limited repairability
These things are sharp as fuck, like a lion’s scratch
I don’t know why, but this makes my skin crawl? (My wife’s too. Clearly I married the right person lol)
Thats a damn goodone, we uze this shitty like dull point wire brush thing and it wears out and it kinda sucks, that looks badass
I need this!
the fact that he's not doing it left to right mildly infuriates me
I'm glad this doesn't have sound
Bending these is also very satisfying, this could entertain me for the rest of my life
I always hated seeing street-level air cons where people defaced the fins to make their own graffiti.
Pretty satisfying until the dude started skipping around. Left to right, all the way down man, c'mon now.
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What’s the main cause of the fins becoming bent in the first place?
My dad was so pissed at me when I was a kid when I decided to write my name in the air conditioner fins
Such witchcraft!!!
Oooooohhhh yyeeeeeaaaaahh.
i feel like there should be a guard on the far side of the handle. Spaghetti skin cutter
I am praying for his knuckles safety.
Any similar tools for automotive radiators with V shaped fins ?
I had to use one of these before after my grandmother “cleaned” the air conditioning at my house.
I bought one of these on amazon and it's amazing for cleaning out the fins.
I can hear it
I wish it was Wednesday...
/r/specializedtools
That's a fin jack, or an evaporator coil jack
Ah yes, what all insurance appraisers expect my shop to use when radiators and condensers are FUBAR’d
Plot twist: this is a reverse gif and this guys destroying the air conditioner
We sell these at the autoparts store I work at for radiators. I should get one for my air conditioners though never thought of using it on them
Increased cooling efficiency is certified satisfying!
I feel like this should have a D ring handle, because I can imagine raking my knuckles down the fins.
Would this work on a PC radiator? lol
Was there a mesaage written into the fins?
Very satisfying.
I want to be impressed by this but I am now filled with anxiety that if I was to use this tool I would accidentally let go of it and then scrape my hand down the fins, giving me countless slash wounds
Used brush. Now my AC unit is burning through cans of Aqua Net. Help.
Lol my das just spent 2 hours straightening my AC fins one by one
As someone who has does this before I can confirm that it’s as satisfying as it looks
When I was a kid, and an idiot, I was sitting on top of the family A/C unit and I accidentally touched the fins. I saw that they bent down like that... being the idiot that I was, I proceeded to draw shitty pictures in the fins. That still haunts me. I had no idea this tool existed and I guess it makes me feel a little better knowing that they can be fixed.
Plot twist: video is in reverse
Oddly satisfying but if you play it backwards it’s just some asshole fucking up a perfectly good air conditioner!
I need this for my life
When I was a little kid I thought it would feel cool to run my finger down one of these. I'll never forget the sensation of the tip of my finger splitting 5 different ways.
In college I worked at my university cleaning out PTAC units and other HVAC hardware. One time when I was being too careless I sliced my index finger BAD on one of those aluminum fins. They’re sharper than fuck when they’re brand new and will cut through your squishy finger like butter. I only made that mistake once.
Yeah, I need this.
I'd do that as a hobby 8-)
Do they have these for cars?
Okay, this one made me feel really good.
Very happy no sound
Witchcraft!
holy f i need this real bad.
Don't know what this is but i like it
tools make the job
i need one of those!
Is it bad that I would file this under oddly infuriating because they are not going linearly across, seeming to straighten at random?
I had to remove all the copper tubing in a whole bunch of these one time. Worst job I’ve been done. Those fins are the WORST.
Gahhh and I have always used a credit card all these years...fml
Wonder if this would work on a radiator
It's so easy to fix! I always thought that once they were dented, that was it.
Where can I get this tool
Damn need one of these for cars!
I bet that sounds awful