the mechanical control for refrigerator is simple but well designed long time ago.
let's make mcu control for refrigerator with using arduino uno.
2 relays are required. one for compressor and the other for defrost heater.
the relay for compressor need 10A ac240/50-60hz.
running current is around 2A for compressor but motor load x cos 𝝓0.4-0.5 and considering inrush current, bigger capacity will be safer for better margin.
due to refrigerant behavior, we need some interval to run or stop compressor.
3 thermistors also are required, one for evaporator, and for freezer and refrigerator side.
not to say, one mechanical refrigerator to simulate.
if you simulate by yourself, take your own risk anyway.
i am not software engineer and my software is not good enough but can run the system.
for this software, i show you next.
let's make mcu control for refrigerator with using arduino uno.
2 relays are required. one for compressor and the other for defrost heater.
the relay for compressor need 10A ac240/50-60hz.
running current is around 2A for compressor but motor load x cos 𝝓0.4-0.5 and considering inrush current, bigger capacity will be safer for better margin.
due to refrigerant behavior, we need some interval to run or stop compressor.
3 thermistors also are required, one for evaporator, and for freezer and refrigerator side.
not to say, one mechanical refrigerator to simulate.
if you simulate by yourself, take your own risk anyway.
i am not software engineer and my software is not good enough but can run the system.
for this software, i show you next.
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