Cooling and heating unit of air-cooled heat pump type

Claim 1

A cooling and heating unit of the air-cooled heat pump type in which a first heat exchange coil for room air-conditioning serving as an evaporator for cooling and as a condenser for heating and a second heat exchange coil serving as a condenser for cooling and as an evaporator for heating are housed in independent cases; and room air supplied after pre-conditioning from a central air-conditioner is introduced into the case housing the first heat exchange coil, brought into contact with the first heat exchange coil and discharged indoors; and the second heat exhcange coil is brought into the case housing the second heat exchange coil into contact with excessive exhaust room air to be discharged outdooors, through said case comprising, an outside air intake for introducing outside air into the case housing the second heat exchange coil, a damper serving also as a shutter provided in an opening of said case for introducing exhaust room air, said damper closing said opening when said unit is brought out of operation and opening said opening when said unit is placed into operation, and a blower for mixing the exhaust room air with the outside air within said case and bringing the mixture into contact with said second heat exchange coil.