since we cannot see a dehumidifier in the cannatrol, I’m thinking they have 2 peltier coolers with One hot side and one cold side on the inside of the cooler. By using the two you can control temp and dehumidify like we are doing. Let me know if you agree.
I’ve been noodling over this too while obtaining the necessary pieces to assemble my wine fridge dryer.
Link to video originally posted in the uk420 thread.
Here’s what I’m seeing in the Cannatrol.
1. There are 2 power supplies. One is definitely to power the peltier cooler. Not sure what the second power supply is doing, but could be running a separate heater or might be dedicated to running the control board & fancy led display.
2. The heat sink used over the Peltier cooler in the back is a massive copper pipe aluminum fin fanless heat sink that looks like it was made for a gaming PC. Most TEC wine coolers have a small heat sink and similar size fan to what’s on the inside of the wine cooler.
3. On the inside of the Cannatrol, there is a fan about an inch or two off the bottom mounted so it either blows straight up or straight down. From what I’ve gathered this seems to be a modification in newer models. Someone on another forum said it was an exhaust fan, but I believe it’s more for air circulation. Seems like an actual exhaust fan would destroy the closed and managed vapor pressure environment they’re using.
Through reading about peltier coolers and TECs in general, I’ve learned that it’s possible to flip the polarity on the TEC chip which then makes the cold side hot and the hot side cold. However, it’s very unlikely the Cannatrol is doing that due to thermal delay and the fact that if you overload the Cannatrol the heatsink of the cold side will ice up and they tell customers to unplug the Cannatrol for 15 minutes then remove some flower to resolve the icing. With that said, I believe they have an oversized TEC that they’re using for both cooling and dehumidification. Since I don’t see a fan on the heat sink on the rear, I suspect they may be allowing the passive thermal radiation to partially act as a small heat source.
edit: I’m high. There’s definitely a fan on the heatsink in the video.