In order to reduce energy consumption of air-conditioner during night

one zoning air-conditioner fixed on the bed

namely bed AC

is developed based on peltier effect. The bed AC is equipped with a heating unit on the foot part and a cooling unit on the head part. It not only meets the thermal comfort of a bed

but also can create a comfortable environment about “warm foot and cool head”. In winter

bed AC can maintain bed air temperature at 22℃

and its power is about 0.1kW~0.2kW

and foot air temperature is approximately 6℃ higher than that of head. In summer

if room temperature is lower than 30℃

bed AC can keep bed air temperature at 28℃

and its power varies from 0.06kW to 0.12kW

and head air temperature is nearly 1.5℃ lower than that of foot. By system simulation

the energy-saving performance is also studied. It can be found that energy saving rate of bed AC in winter and summer sleeping time is 52% and 42% respectively

compared with traditional split air-conditioner.