/robowaifu/ - DIY Robot Wives

Advancing robotics to a point where anime catgrill meidos in tiny miniskirts are a reality.

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Robowaifu Thermal Management Robowaifu Technician 09/15/2019 (Sun) 05:49:44 No.234
Question: How are we going to solve keeping all the motors, pumps, computers, sensors, and other heat-producing gizmos inside a real robowaifu cooled off anons?
>>234 I'm no expert, but I'll throw out some ideas that I always thought might not just help with function, but with verisimilitude, which IMO is the name of the game. Each method I have might not be perfect, but you can use them together, and hopefully they add up. Water cooling system which is basically a circulatory system. The heat is carried closer to the surface, and to areas which otherwise would not be producing much, if any heat, where some heat can dissipate in a way that would feel like body heat. A "lung" like structure could be used to take in cold air, warm it in the lungs, and then breathe it out as hot air. The "lungs" can of course be anywhere in the body, in multiple locations that would allow them to collect a lot of heat, or which would get too hot and can't dissipate the heat through the circulatory system fast enough. In case of emergency overheating, the water in the circulatory system can be drained through the vagina. It simulates another lifelike function and adds to the verisimilitude. Just sit her on the toilet, maybe hook up a hose from the sink to her mouth to flush the entire system. You could make it flush out of a more accurate urethra, but flushing out of the vagina would also serve the purpose of cleaning it. From what I've heard of sex dolls and fleshlights, cleaning them is one of the worst parts.
>>2535 Yes, you're right on track with the community here. These are ideas that have received broad approval here on /robowaifu/. For draining heat very quickly, you don't even have to have her sit on the potty. you can just hook one input to the water faucet, then have her drain the fluid out an outlet port down into the drain. This might be useful for example, after heavy sexual exertion. Hopefully as our designs improve over the years these types of measures will be less needed, but for now it's a useful approach.
>>2536 >you don't even have to have her sit on the potty. you can just hook one input to the water faucet, then have her drain the fluid out an outlet port down into the drain. Well sure. But I figured a potty would be the easiest drain to access most of the time, while also adding verisimilitude. I guess you could use a bathtub or whatever just the same. Or maybe if you're in some basement dungeon maybe our target audience you would have drains right in the floor. Sure. Whatever you're into.
>>2539 No, it's a good idea. A urethra can be easily devised. Onaholes don't typically have ports for fluid plumbing as far as I know, so I think replaceable vagoo cartridges are more likely a better choice for today, hygiene-wise. >Sure. Whatever you're into. Heh, I meant the kitchen or bathroom sink. :^)
>>2540 Replaceable parts are a great idea all around, unless we're dealing with very cheap gynoids in the first place. I don't have a fleshlight, but don't at least some of them have holes on both ends, just only one end is usable? Just stick a hose on the inside end, the non-fucking end. Gotta wash it anyway. It's replaceable, but I think if you had to replace it every time, it might turn off more users than it gains. I also wonder which option would be cheaper for the average user, or which would at least be more attractive to prospective buyers.
>>2541 I dunno, never used one tbh. As you're probably well aware (if you're who I think you are) then economy pretty highly is important to start out with. We could engineer our own molds, or possibly even find vagoo designs specially fitted for flushing out. But in the meantime, cheap disposable cartridges seem to me our best bet in the interim.
>>2542 I'm sure someone on this board will be able to tell us if the one-time-use onaholes are cheaper in the long run than a reusable fleshlight. Fleshlights, of course, are still technically replaceable, if we used them as the robot's vagina. It's just a question of how many uses per dollar you get.
>>2544 >I'm sure someone on this board will be able to tell us Actually, we lost most of our people after the false-flag. The Doll Forum could though I'd bet.
>>234 Method 1: liquid circulation Coolant veins that absorb heat and then diffuse it into the skin or lungs which diffuse it back into the air. Could possibly be kept on the same track as the liquid in hydraulic muscles, if need be. Method 2: air circulation Similar to method one, but instead of pumping a liquid it would be pumping air. Less conductive, but could be integrated into pneumatic muscles and doesn't have the same risk of a coolant leak destroying hardware. An air circulatory system doesn't have to be limited to tubing either, more open spaces internally . A circulatory system would need a filter and dehumidifier though. Depending on if we want the entire thing to have skin or don't mind a more open design, sections like the forearm could be a mesh to allow for natural airflow in sections that aren't at risk of being damaged if not kept airtight. Method 3: combination It may be more effective to have an air based circulatory system that heats up a well insulated pouch of water as well as a sort of lung or skin that is kept away from anything particularly heat sensitive so that it can act as a heat sink and slowly dissipate the heat when temperature isn't as much an issue, such as times of inactivity. Come to think of it, thermoelectric coolers would be an interesting idea if you could manage to vent the heat that it creates easily enough. As long as we are going with the idea of having an insulated area to act as a heatskink it would definitely be possible to combine that with a peltier cooler as long as the circulation and insulation was managed well enough.
For the more expensive and mb more human-like bots I'm going with the idea of using water to dissipate heat as body warmth. However, in that case we might rather need some heat. So if she's plugged in, she might even use some internal heater for stored water. A more advanced idea would be to get this heat also from sunbathing. Also, to store heat in a small salt "battery". Another point is that electronics fail over time bc temperature fluctuations. So the goal should be to keep them at the same level most of the time. The private parts in more advanced bots absolutely should be automatically cleaned with internal water, and such wastewater then being released in a human-like way.
>>4228 >Coolant veins Aquarium tubing is probably pretty cheap purchased in reels. >Similar to method one, but instead of pumping a liquid it would be pumping air Yeah, we are definitely going to need internal air circulation. While not quite as effective as liquid heat absorption, air has the major benefit of near-zero daily maintenance, effectively inert reaction with components, and the ability to sneak into any accessible nook and cranny with only a bit of foresight in design planning. And as some Anon already pointed out, it will be nice to have your robowaifu's warm breath near you when you're sleeping together. :^) Yes, we could do with a couple of thermoelectric sinks somewhere in the chest.
>>4229 We will definitely need to solve vagoo-cleaning protocols for robowaifus. Some of it can be automatic, but it would be nice if she can replace her own onahole cartridges, clean the used ones, and inform you/purchase herself when she needs new ones.
>related xpost >>4225 >>4261
Open file (43.97 KB 800x600 lungs.png)
>>4265 Lungs are a must for making the system as human as possible, but not a requirement for all designs. However, as >>4237 pointed out, air circulation will be very valuable for getting into the places that a liquid coolant tube would not. I wonder if it would be possible to use a thermoelectric cooler in a lung system so that the air and fluid internally could be cooled, while the cooler would disperse the heat into a sort of lung system using a heatsink or if just adding a filter, dropping the cooler, and combining the lung into a single structure would be better. This would be, of course, in conjunction with trying to draw heat to the skin to disperse into the air. I wonder what the best kind of silicone would be for that.
>>4267 That is a very clever arrangement. Brillian, Anon. :^) And thermo electric sinks have a hot side and a cold side. So, you'd place the cooling fins from the cold side in the intake->inside crossover to cool the outside air further, and the heating fins from the hot side would be in the inside->exhaust segment. >I wonder what the best kind of silicone would be for that. I expect there are industrial data sheets out there somewhere that give numbers on that exact topic.
>>4268 >thermo electric sinks have a hot side and a cold side Right. I was thinking that the internal air and coolant tube in the left lung of the diagram could be kept completely closed in order to limit the need for a filter, while the right lung would just expand and contract in order to circulate out the hot air as it is dispersed by a heat sink. The left lung would probably need a fan to keep air flowing and a pump to keep the liquid flowing, but my concern is that one or even a few coolers may not be enough. >I expect there are industrial data sheets out there somewhere that give numbers on that exact topic. From what I can find, silicone is just a generally insulating material. There seem to be a few examples of heat spreading, which is very good, but none of them are elastic enough to be used as a skin. I don't see a better alternative to a silicone elastomer as skin, but given the low conductivity it could prove challenging.
>>4283 >I was thinking that the internal air and coolant tube in the left lung of the diagram could be kept completely closed in order to limit the need for a filter I see, ofc that's a good idea. I forgot about that constraint. >while the right lung would just expand and contract in order to circulate out the hot air as it is dispersed by a heat sink. The more I think about this, the more I like the idea of devising a bellows arrangement. Not only can it be quite efficient mechanical-energy-wise, but it also will nicely mimic human breathing patterns. And that can only be a plus on cold, snuggly nights together with robowaifu. :^) >The left lung would probably need a fan to keep air flowing and a pump to keep the liquid flowing, Yes, unless we can take advantage of the bellows mechanism for the airflow on that side as well. And the liquid might be able to gain by some sort of bladders around the robowaifu (that could ostensibly be used for padding, shape & form, etc) that could be passive pumping action by her day-to-day movements, etc. Probably would only serve as a small ancillary boost to the fluid pump's basic work, but every little helps. It will all need to be analyzed in the end for cost/benefit against the energy budget. But things like temporarily storing momentum inside rotating flywheels is well understood now, so we might find little bonus energy savings like that with a little clever exploration. >but my concern is that one or even a few coolers may not be enough. Probably not, unless it was a big honking one. Any information on the available plate sizes on these things Anon? >From what I can find, silicone is just a generally insulating material. Yeah, makes sense ofc. >There seem to be a few examples of heat spreading, which is very good, but none of them are elastic enough to be used as a skin Hmm, that's interesting. Since from a systems engineering perspective, we already need to solve differing surface materials with differing softness/resiliency then we might just be able to capitalize on that fact by judicious use of these materials. Can you provide more information on your findings here? >I don't see a better alternative to a silicone elastomer as skin, but given the low conductivity it could prove challenging Agreed. Good post Anon.
>>4303 >bellows arrangement The artificial lung system could probably be supported by a diaphragm type muscle that separates it from what would be the liver, stomach, and intestinal tract in a human. Considering the limited space for computation and other potential features, it might not be space efficient enough, but it is definitely an interesting idea. If the closed loop lung is hooked up with a couple valves it could possibly be used to naturally pump air through the air veins in the same way the heart pumps blood, but it probably isn't the most efficient system. Technically, it may be possible to pump coolant in the same way we pump blood as well, but with a centrally located dedicated artificial heart. >Any information on the available plate sizes on these things Anon? The small ones are only about $3 each, but plate size doesn't seem to be as important as having a good heat sink. Without any sort of fan the things will overheat, so what seems to matter is more the transference of the heat. I gather that depending on the voltage applied, each side will have a difference of about 30 C. This does mean that if the device itself heats up too much the cold side will heat up along with the warm side, so venting that heat is a must. Unfortunately, even with a heat sink and a diaphragm it may not be enough to disperse the heat quickly enough, even for a single very small plate.
>>4334 >Considering the limited space for computation and other potential features The general consensus (I think) is to house all the SBCs and other sensitive electronics in a 'breadbox' that would both serve as a cushioned hardshell for physical protection, and a Faraday-cage for RF protection. It also simplifies the cooling need for the computers as well. So, I think some sort of central lever arm back near the spine, that spans the chest transversely, that slowly pumps two cylinders situated on either side of the central breadbox might be a feasible approach to have this bellows solution and still share the space with other components. Think sort of where our lungs are, but half the size and situated just inside our ribcage on the far right and far left of her chest. >Technically, it may be possible to pump coolant in the same way we pump blood as well, but with a centrally located dedicated artificial heart. Yeah, that's perfect. We need some sort of centralized thermal management core, probably just above the breadbox. That way the exchange of heat can be simplified by being near the 'lungs' and also directly adjacent to the breadbox (which will be a significant heat source). >but plate size doesn't seem to be as important as having a good heat sink That seems to suggest we have some honking big spun-aluminum fins situated on both the hot and the cold sides inside the central thermal mgmt core. >Unfortunately, even with a heat sink and a diaphragm it may not be enough to disperse the heat quickly enough, even for a single very small plate We can add a forced-air fan and vent heat directly out her upper back near the neck, as it will literally be 1 inch away from the core. Care to off critiques of my suggestions here Anon?
>>4348 >Care to offer* >"Your post looks like spam. Please adjust it."
>>4348 Hard to visualize without a diagram, but I think I get the picture. It could work, but without knowing how much heat will be produced from the various motors and electronics as well as how much heat can be dispersed with this method, I think it may be impossible to tell until a general model is made and tests are run. Really, as long as we can get a decent body made we can probably adjust the temperature needs once we have the limbs, muscles, and general torso blocked out.
>>4359 >I think it may be impossible to tell until a general model is made and tests are run Agreed. I'll break out the old mouse and try to knock together 9'001 hours in MS Paint for you here.
> RF protection I had the same idea. However, premium models will need to use a lot of conductive material for sensors in the skin anyways, which might also help with heat dissipation. So it has a triple use, but will be expensive. > Breadbox I'm thinking of using air tanks in the head and/or upper chest. Computers would be inside or outside of these. Either way, using the heat to increase the pressure. Additional cooling should kick in if necessary. Tanks on the other side could use hot water from other areas to heat themselves up. > 4283 What do you think about only having a thin skin of silicone/spandex on top, underneath conductive material like textiles with silver and underneath that, tubes with the hot water, maybe with some conductive connections to a higher layer. How could we test stuff like that? Hot-water bottles are made out of silicone, I think. If we test how much time it takes to cool a bit down, and compare it to a scenario in which there are other layers on top and heat can't go away to the side bc styrofoam? Then we would know a bit more.
>>4371 >How could we test stuff like that? I guess buy a couple of water bottles, a heater, a thermometer, a stopwatch, and some styrofoam? No time like the present to run your own scientific experiments right?
>>4377 I thought about it a bit more, I might first need a thermometer with a water probe. Then, using only two flexible tubes glued side by side with a little distance between them. One side with four layers of thin textiles with a thin layer of silicone on top. The other sides need to be isolated much more. Of course, this doesn't account for new heat coming in. It will just show if the water cools down in a certain amount of time. I'll try that in some time, don't know when, but it's on my mind.
>>4424 Aquarium supply stores can provide both water-immersible heaters and thermometers Anon. Buy a cheap strofoam cooler as your basic containment vessel and you can get a 2-pack of gatorade and chug them to get your bottles. Sound good?
>>4433 I don't need bottles, since I already have the tubes. With hot-water bottle I meant one out of silicone to put on a belly. But, yeah I might have a pet shop here, I planned to go with AliExpress bc prices and it isn't urgent. We'll see.
Did anyone consider heatpipes? The fastest heat conductor? https://youtu.be/OR8u__Hcb3k https://youtu.be/BCQKwMSgmRI https://youtu.be/ezb3qRq3ACc Maybe useful for some areas which aren't bending.
>>4443 Definitely. Heat pipes are extremely effective at bringing heat from one place to another. I don't think the robot could likely function without them. I guess the question is where they could be used most effectively. Around the computation would be the most obvious of course, but there is the potential for their use generally in the torso. Shame there aren't any small flexible heat pipes, but is makes sense given the design.
>>4446 They might help here and there with getting heat away from motors and batteries, not only computers. In the bigger ones heat cold be distributed over longer distances if we make the pipes part of some bones, which would also make them sturdier.
>>4446 >Shame there aren't any small flexible heat pipes, but is makes sense given the design. This may not be flexible Anon, but it looks pretty small (in diameter) to me. > (1) >sauce: https://en.wikipedia.org/wiki/Heat_pipe / other commercial info https://www.heatpipe.com/what-are-heat-pipes/ https://www.1-act.com/innovations/heat-pipes/ Also, there are flat heat-sink versions that perform a similar function, if not as efficiently. > (3) https://en.wikipedia.org/wiki/Heat_spreader
>>4469 >related >Your post looks like spam, please adjust it.
An engineering specialty I find particularly interesting is a Spacecraft thermal control system (TCS). These systems have lots of budget, and the stakes are quite high (both for success and for failure). https://en.wikipedia.org/wiki/Spacecraft_thermal_control Surely this domain offers lots of informative lessons for /robowaifu/ to learn from? A wide array of agencies, institutions, and organizations have been doing this kind of thing for 60+ years now.
Thermal pads might be very usefull for areas where there's not much space. They could transport heat horizontal. They're are not so good for replacing thermal paste: https://youtu.be/ipFhGlt8Qkw I recalled that video and method when thinking about having some motors and solenoids side by side, we can't put a watercooler in between in every case (bc space) and air might also not be a option in every case.
>related xpost >>8986
Open file (137.66 KB 256x512 Stirling_Animation.gif)
What about Stirling Engines, /robowaifu/ ? Surely some areas of the breadbox and hip/shoulder actuators will get quite hot enough to run some type or other of one of these things? https://en.wikipedia.org/wiki/Stirling_engine
>>9572 >related
>>9572 I think to have any reasonable shot at success, the waste heat will need to be piped directly into a central heat consolidator, and a single Stirling engine located attached to it. This might be enough heat to gain enough effective work to make it worthwhile. Of course, all the cooling systems for the robowaifu would also need to route directly there as well, whether liquid or air based. These things must have both a hot and a cold side to work at all.
I don't consider that to be a good idea, however he is building one: https://youtu.be/eZUteOLEKz8 - I'd rather use something like that externally to harvest solar thermic energy to gain electricity, and then one use cases would be charging robowaifus. So it's more of a prepper thing, or pushing alternatives to carbon based energy, and maybe for hiding huge energy consumption from the officials.
Insects have it better on cooling. Using exhaust ports for pushing hot air out. So we can probably have a dual system for passive and acrive cooling. Just put vents mainly at the core and at the limbs so when she passive cools you can feel heat as well.
>>9587 Dependent on the kind of build, there's a big vent - the mouth. Let's just use this one, or not? Also heat is usefull to be spread out throughout the outer shell which might be some kind of skin. Then it will radiate out, no extra holes required.
>>9587 >>9594 Certainly, all three forms of heat transfer conduction, convection (forced or otherwise), and radiation will all play a role in keeping our robowaifus cooled off. But Anon is right >>9585 if for no other reason than the loud noise associated with the mechanisms of the engine. I withdraw the suggestion, as far as in internal device in our robowaifus. :^)

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