PURPOSE: A double-layered thermostatic plastic greenhouse is provided to maintain the optimal temperature for growing crops by using subsurface water as a heat source and circulating outside air in the space between the inner and outer plastic greenhouses.CONSTITUTION: A heat exchanger(130) cools or heats the outside air using the pumped subsurface water as a heat source. A first blower(140) inhales outside air and circulates the cooling air or heating air in the intervening space between the outer plastic greenhouse(120) and the inner plastic greenhouse(110). A second blower(150) is installed on the other lower side of the outer plastic greenhouse, and discharges the circulated cooling air or heating air to the outside. A ventilation fan(160) ventilates the inside air of the inner plastic greenhouse. A guide wall(170) is installed with slope at the part where the heat exchanger is installed so that the cooling air or heating air is circulated. A subsurface water circulation part(180) is connected to the heat exchanger. A suction pipe(182) inhales the subsurface water through a pump(181) which pumps the subsurface water. A discharging pipe(183) discharges the subsurface water. The double-layered thermostatic plastic greenhouse is equipped with an outside temperature sensor for measuring outside temperature of the outer plastic greenhouse, and an inside temperature sensor for measuring inside temperature of the inner plastic greenhouse.COPYRIGHT KIPO 2013본 발명은 이중 항온 비닐하우스에 관한 것으로, 외부 비닐하우스의 일측 하부에 설치되며 펌핑된 지하수를 열원으로 하여 외부 공기를 냉각 또는 가열하는 열교환기와, 열교환기와 일체로 설치되며 외부 공기를 흡입하여 외부 비닐하우스 및 내부 비닐하우스의 사이 공간으로 냉방 공기 또는 난방 공기를 순환시키는 제 1 송풍기와, 외부 비닐하우스의 타측 하부에 설치되며 순환된 냉방 공기 또는 난방 공기를 외부로 배출시키는 제 2 송풍기와, 이중 항온 비닐하우스의 상단부에 외부 비닐하우스 및 내부 비닐하우스를 관통하여 설치되며 내부 비닐하우스의 내부 공기를 환기시키는 환풍기를 포함할 수 있다.
