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The article did not answer for me "but where does the heat go?" :(. (It has a link to a more complete set of marketing materials which may or may not answer tha

by saurik 7y ago

The article did not answer for me "but where does the heat go?" :(. (It has a link to a more complete set of marketing materials which may or may not answer that question, but it is all in Japanese.)

deleted 7y ago
[deleted]
abdullahkhalids 7y ago
Note that there are two settings cool and heat, so presumably its an actual heat pump rather than water cooling or something else. I would guess the device tries to pump hot air up and out through the collar and cold air down into the shirt.
cynix 7y ago
It appears that the device is only cool to the touch and does not generate any cool air, so it's not an air conditioner per se, more like an electric ice pack. The heat will presumably escape via the air vents at the back.
- KozmoNau7 7y ago
  And of course it puts out additional heat into the room, making it slightly more miserable for everyone else. There is some kind of metaphor in that.
  - braythwayt 7y ago
    Let’s walk together through a typical city neighbourhood street today. As we converse, let’s raise our voices to drown out the hum of air conditioners jutting out from windows or affixed to cement pads beside buildings. Some old stores have doors that once had a transom window overhead. In older times, the transom windows were opened on a warm day, and hot air in the room would rise, and then be blows out of the building through the transom window. Today, we close them windows up, creating a box that superheats in the sun. So we stick air conditioners in the old transom windows, and they blow hot air into the street like jet engines. As we walk past these, we must duck. The hot air will eventually rise, but as it erupts from the air conditioner, turbulence brings the heat down to our level, making a hot day even hotter for those walking past. Air conditioning has always been the proposition that “I’m cooling myself at somebody else’s expense.”
    - mrep 7y ago
      > Air conditioning has always been the proposition that “I’m cooling myself at somebody else’s expense. That's not much of an issue though: "For a 2014 paper, Francisco Salamanca and colleagues at Arizona State University modeled the effects of air conditioning on surface air temps in Phoenix. They found a nighttime increase of about 2°F (and nothing much during the day)" [0]. [0]: https://www.popsci.com/ask-us-anything-does-using-ac-make-it-hotter-outside/ https://www.popsci.com/ask-us-anything-does-using-ac-make-it...
      - braythwayt 7y ago
        And yet, as I walk down the street in an older neighborhood with air conditioners in the transoms, I am hit by blasts of superheated air. I likewise also hear the noise (although in my lifetime air conditioners have gotten quieter, I suspect as a side-effect of air conditioners becoming more efficient). I guess I'm trying to say that the expression "at someone else's expense" not just a question of the surface temperature.
fulafel 7y ago
I often wonder the same about the disposable cooling bags.
- wffurr 7y ago
  In those bags, the heat goes into chemical bonding energy via an endothermic reaction. So basically into the bag. Eventually it fully reacts and will warm to the touch like any other object.
mhb 7y ago
This[1] says it uses Peltier devices. They are not very efficient and, of course, also need to get rid of the heat somehow. I'm skeptical about the utility of this. [1] https://www.slashgear.com/sony-reon-pocket-is-a-crowdfunded-wearable-air-conditioner-and-heater-25585239/ https://www.slashgear.com/sony-reon-pocket-is-a-crowdfunded-...
- anotheryou 7y ago
  Peltier + fan, you can see it here: https://first-flight.sony.com/images/projects/reonpocket/image03.jpg https://first-flight.sony.com/images/projects/reonpocket/ima... Looks like it blows the heat away? So it's really just a spot-cooler, which would be uncool because a cold spot will fool the body in to thinking of an inflamation I think (so you'll get a stiff neck).
  - jaclaz 7y ago
    >Looks like it blows the heat away? ... and possibly just in the face of the guy/gal behind you (I am thinking of a typically crowded Tokyo metro/station).
- londons_explore 7y ago
  Does anyone may tiny compressors? I'm thinking a micromachined scroll compressor could be far more efficient, silent, and perhaps fit in a unit the size of a matchbox and still provide a welcome 25 watts of cooling (from ~5 watts of input power, since the input/output temperature difference is small)
  - FiatLuxDave 7y ago
    If anyone has an answer to this question, I'm definitely interested in a mini compressor. As in, my credit card is ready and waiting.
    - londons_explore 7y ago
      The best I can find today is something like this: https://www.aliexpress.com/item/32911065860.html https://www.aliexpress.com/item/32911065860.html Looks like you could combine that with a butane-propane mix as a refrigerant, and make a decent little 2 watt chiller - although it really depends what the efficiency of that compressor is. I wonder if it would be more efficient than a peltier unit?
rasz 7y ago
peltier + radiator + fan + battery + BT controller, shirt has a pocket directly over lower neck. Its one of those so obviously useless things even a 11 old could come up with it https://www.cbsnews.com/news/this-11-year-old-texas-boy-invented-a-device-to-prevent-hot-car-deaths/ https://www.cbsnews.com/news/this-11-year-old-texas-boy-inve...

by saurik 7y ago

The article did not answer for me "but where does the heat go?" :(. (It has a link to a more complete set of marketing materials which may or may not answer that question, but it is all in Japanese.)

deleted 7y ago

[deleted]

abdullahkhalids 7y ago

Note that there are two settings cool and heat, so presumably its an actual heat pump rather than water cooling or something else. I would guess the device tries to pump hot air up and out through the collar and cold air down into the shirt.

cynix 7y ago

It appears that the device is only cool to the touch and does not generate any cool air, so it's not an air conditioner per se, more like an electric ice pack. The heat will presumably escape via the air vents at the back.

KozmoNau7 7y ago
And of course it puts out additional heat into the room, making it slightly more miserable for everyone else. There is some kind of metaphor in that.
- braythwayt 7y ago
  Let’s walk together through a typical city neighbourhood street today. As we converse, let’s raise our voices to drown out the hum of air conditioners jutting out from windows or affixed to cement pads beside buildings. Some old stores have doors that once had a transom window overhead. In older times, the transom windows were opened on a warm day, and hot air in the room would rise, and then be blows out of the building through the transom window. Today, we close them windows up, creating a box that superheats in the sun. So we stick air conditioners in the old transom windows, and they blow hot air into the street like jet engines. As we walk past these, we must duck. The hot air will eventually rise, but as it erupts from the air conditioner, turbulence brings the heat down to our level, making a hot day even hotter for those walking past. Air conditioning has always been the proposition that “I’m cooling myself at somebody else’s expense.”
  - mrep 7y ago
    > Air conditioning has always been the proposition that “I’m cooling myself at somebody else’s expense. That's not much of an issue though: "For a 2014 paper, Francisco Salamanca and colleagues at Arizona State University modeled the effects of air conditioning on surface air temps in Phoenix. They found a nighttime increase of about 2°F (and nothing much during the day)" [0]. [0]: https://www.popsci.com/ask-us-anything-does-using-ac-make-it-hotter-outside/ https://www.popsci.com/ask-us-anything-does-using-ac-make-it...
    - braythwayt 7y ago
      And yet, as I walk down the street in an older neighborhood with air conditioners in the transoms, I am hit by blasts of superheated air. I likewise also hear the noise (although in my lifetime air conditioners have gotten quieter, I suspect as a side-effect of air conditioners becoming more efficient). I guess I'm trying to say that the expression "at someone else's expense" not just a question of the surface temperature.

fulafel 7y ago

I often wonder the same about the disposable cooling bags.

wffurr 7y ago
In those bags, the heat goes into chemical bonding energy via an endothermic reaction. So basically into the bag. Eventually it fully reacts and will warm to the touch like any other object.

mhb 7y ago

This[1] says it uses Peltier devices. They are not very efficient and, of course, also need to get rid of the heat somehow. I'm skeptical about the utility of this. [1] https://www.slashgear.com/sony-reon-pocket-is-a-crowdfunded-wearable-air-conditioner-and-heater-25585239/ https://www.slashgear.com/sony-reon-pocket-is-a-crowdfunded-...

anotheryou 7y ago
Peltier + fan, you can see it here: https://first-flight.sony.com/images/projects/reonpocket/image03.jpg https://first-flight.sony.com/images/projects/reonpocket/ima... Looks like it blows the heat away? So it's really just a spot-cooler, which would be uncool because a cold spot will fool the body in to thinking of an inflamation I think (so you'll get a stiff neck).
- jaclaz 7y ago
  >Looks like it blows the heat away? ... and possibly just in the face of the guy/gal behind you (I am thinking of a typically crowded Tokyo metro/station).
londons_explore 7y ago
Does anyone may tiny compressors? I'm thinking a micromachined scroll compressor could be far more efficient, silent, and perhaps fit in a unit the size of a matchbox and still provide a welcome 25 watts of cooling (from ~5 watts of input power, since the input/output temperature difference is small)
- FiatLuxDave 7y ago
  If anyone has an answer to this question, I'm definitely interested in a mini compressor. As in, my credit card is ready and waiting.
  - londons_explore 7y ago
    The best I can find today is something like this: https://www.aliexpress.com/item/32911065860.html https://www.aliexpress.com/item/32911065860.html Looks like you could combine that with a butane-propane mix as a refrigerant, and make a decent little 2 watt chiller - although it really depends what the efficiency of that compressor is. I wonder if it would be more efficient than a peltier unit?

rasz 7y ago

peltier + radiator + fan + battery + BT controller, shirt has a pocket directly over lower neck. Its one of those so obviously useless things even a 11 old could come up with it https://www.cbsnews.com/news/this-11-year-old-texas-boy-invented-a-device-to-prevent-hot-car-deaths/ https://www.cbsnews.com/news/this-11-year-old-texas-boy-inve...