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Apple Hints At Future Liquid-Cooled Laptops
Lumenary7204 writes "According to the Register, Apple recently received US Patent Application No. 20080291629 for a 'liquid-cooled portable computer.' The filing describes a system where a 'pump ... coupled to the heat pipe is configured to circulate the liquid coolant through the heat pipe.' All claims of obviousness aside (after all, PC enthusiasts have been using liquid and phase-change cooling for years), the existence of the patent application seems to indicate that laptop manufacturers are in agreement with physicists and engineers who say we are running up against the practical limits of air-cooling such compact pieces of equipment."
Literally, it won't fly. Getting one on an plane would be impossible anywhere in north America.
I doubt it - that sounds like a miniture cryobomb to me. Depressurising liquid nitrogen (i.e. exposed to air) cools very, very fast, so if the device was ruptured it could cause some very nasty cold burns. This might be applicable in some limited circumstances, but the risk of costly litigation is too high for the general consumer market.
my father has got one of those huge 19" laptops with a 3ghz+ pentium 4 processor and geforce 5xxx graphic chipset
unless we put something under it so there is some room between the laptop and the table, it completely overheats as soon as i stress it (a simple game that a pc like that hsould easily handle. Diablo 2 or so) -_-. even with some room under it, it only takes a few minutes for it to get seriously hot (you can actually feel from the outside of the laptop where the hot spots are)
i wonder what ever made them create such stupid laptops (and what made my father buy one -_-)
I would be interested to see the energy difference between a laptop with a fan versus water cooling. I know that the specs haven't been released yet, but it seems like pumping water around would eat up the battery.
I have a HP laptop which runs fairly hot, but that's still better, as far as I'm concerned, than carrying around a heavy pump that uses up the battery.
Of course, if they manage to make it more compact and energy efficient than fans, all the power to them. I would still worry about it leaking and destroying my laptop, though.
Since Apple is trying for a patent for all types of mobile devices on this, it would be particularly interesting to see a water cooled iPhone...
After reading the specification, it sure sounds to me like a description of a prototype product on which Apple is trying to get patent protection. Some of the specifics in the specification are just too, well, specific -- for example, the description in [0034] of the use of a Venturi tube, or the parenthetical comment in [0035] about the use of ultrasonic frequencies in the membrane pump.
Possibly the biggest detail, though -- and the one bit of novelty I think I see in the specification that could form the basis of an allowable patent claim -- is the comment in [0041] that the heat may be coupled to the outside world by a plate behind the display. This is exactly the kind of novelty nugget -- assuming it really is novel -- to which I referred in my earlier comment. One way Apple could get an allowance on this application, after the initial rejection by the examiner, is to include this feature in an independent claim; the invention would then be a liquid-cooled laptop with the heat exchanger behind the display. (Of course, in that case your liquid-cooled laptop that doesn't have the heat exchanger behind the display wouldn't infringe on the resulting patent.)
As I said, assuming that it is a novel feature. PC design is not my specialty. Has anyone seen art before May 22, 2007 -- the filing date of this application -- describing a liquid-cooled laptop with the heat exchanger behind the display?