On the calculation of electric energy meter The following are the main technical parameters of a refrigerator Rated voltage 220 V rated power 120 W power consumption 1.2 kW · H / 24 h When the refrigerator works normally, the turntable of the electric energy meter turns every minute (3000r / kW · h is marked on the electric energy meter). If the compressor of the refrigerator only works for 15min each time, the compressor of the refrigerator will start every day and night

On the calculation of electric energy meter The following are the main technical parameters of a refrigerator Rated voltage 220 V rated power 120 W power consumption 1.2 kW · H / 24 h When the refrigerator works normally, the turntable of the electric energy meter turns every minute (3000r / kW · h is marked on the electric energy meter). If the compressor of the refrigerator only works for 15min each time, the compressor of the refrigerator will start every day and night

Power consumption per minute w = Pt = 120W * 60s = 7200j, power consumption per minute w = 3600000j, power consumption per minute w = 1200J, power consumption per minute 7200j / 1200J = 6, power consumption per day and night (24h) 1.2kwh, power consumption per minute w = Pt = 120W * 15 * 60s = 108000j, startup times = 1.2 * 3600000 / 108000 = 40 times (absolutely correct)