Hello all again, and sorry for being away all summer!
So there are a couple of things I'd like to fix before release:
Wood around heating panel gets too warm in longer sessions if many people use the vaporizer and it doesn't have time to cool down. For this I have been trying to get ideas how to do it. Now the hot heating element, with its stainless steel tube at over 150-200 degrees Celcius is sitting inside the oak, and there is 2,5 mm separation between them. And because the wood doesn't have many mm material left on top and bottom side of the oak frame, the heat gets trough and can get uncomfortably hot to the touch.
I assume that the reason for this is that the airflow between wood and heating element is nearly non existent when nobody is inhaling from it, so there will be hot air standing there. And the bigger reason, is that a stainless steel tube that hot, is radiating infra red heat around quite a lot, and the oiled, dark coloured oak wook is absorbing this very well and the oil content in wood makes it conduct heat better than plain wood. so it is no wonder, that when we are doing tests with it and leaving it on for a table without any airflow, and running 10 minutes, the wood will feel painfully hot to the touch on the region over the heating element.
Now I have some ideas to combat against this. The positive thing is that none of the test users of my prototypes has said this is a real problem in use, or would lead to returning the unit, you don't really hold it from that part of the vaporizer, but I really would like to get it cooler.
I have read and seen how metallic reflective surfaces are used to block and reflect heat radiation from getting to more sensitive parts. this would make sense to install for example aluminium shield there, between heating element and the oak, so that it would prevent most heat radiation from directly reaching the oak. Of course the shield will get warm too, but nowhere near the temps of heating element and thus will radiate many times less energy towards the oak. And if this aluminum shield would be installed so that there is little airgap also between the heat shield and oak, the temperature transfer from conduction would be much less and I think these changes will lower the temperature of the wood considerably. If this is not enough, I think a small fan installed in the back, blowing air out and making air move trough the system can be used to control temps, and get the excess heat energy out of it after use.
I am now preparing drawings for new parts to try out these changes.
The other thing is, that there is a possibility for the user to burn his finger with the hot herb chamber. Normally you can hold it in your hand ergonomically from the upper part of so that you don't touch the herb chamber but it even happened to myself once or twice, that I was not paying attention and just grabbed the vape from the table without looking what I was doing, and the burning sensation of my finger made me remember to be more careful with it. So some for of protection would be nice to have so that everybody would not need to learn this lesson the painful way.
For this I am open for suggestions, how it could be implemented in this vaporizer. As well as all other things too of course, new ideas are always welcome!
About battery run time, about this I've heard positive comments from my testers, that extra set of batteries have not even been necessary as a single charge goes so far. I've never got to test how long it actually works but I made one test. There is automatic turn off of the unit, if it is idle for 4 minutes without touch. So it is some +6 minute session if turned on with warm up and the until automatic shut down. This is quite a long session as the vaporizer put outs massive clouds of vapor as soon as it is warmed and will medicate very quickly. But anyway, I just turned it on always after it had shut down, and after 12 times doing this and batteries still worked, I got tired and didn't get to see how many times they would have lasted. But I think best part of quickly replaceable batteries is that there is no need to worry if the batteries will have to be charged or not before vaping because it doesn't matter when you can just put new ones in anytime necessary and let the empty ones get charged without need to wait for that. And also, no need to worry about batteries wearing in use, they don't cost that much that it is worth worrying when you can always get new ones when necessary. And also possible to enjoy advancing battery technology with better capacity ones coming out every year.
I've been also thinking, how much to keep it as simple as possible and how much to give freedom to the user. Now there is possible to adjust pre-heating time quite freely to achieve different temperature levels automatically depending on the herbs used and the personal preferences. Also it is possible to change the power level of heating element in 10 steps, 10-100%. The only thing I see now which cannot be changed is the level of the boosting. Now, when user presses the boost, it will immediately put out the predetermined maximal power of the heating element. But to be honest, with the new improved halogen heating element, this is quite powerful and sometimes I felt that unlike the old one in the Venus Vaporizer, when it was possible to just boost always when taking a hit, now I had to sometimes release the boost in the middle, as the vapor started to get really strong and hot. So there is at least need to fine tune the power setting for boosting, But on the other hand, I would not like to restrict the capabilities of the heating element in case someone will find it useful. So maybe I could have also a setting for boost power level, for example 3 different, low, standard, and high.