PURPOSE: A plant cultivation device is provided to maintain the appropriate temperature in the culture medium for growing plants and to increase the amount of dissolved oxygen. CONSTITUTION: A culture medium tub(100) has mounting holes for settling flower pots(300-P) for the hydroponics on the top. A 1-1 circulating pipe(410) is connected to one side of a cultivation bed(300) in order to flow the culture medium in the culture medium tub into the cultivation bed. A 1-2 circulating pipe(420) is connected to the other side of the cultivation bed in order to flow the culture medium in the cultivation bed into the culture medium tub. An LED(Light Emitting Diode) substrate(510) is mounted with LEDs(520) in order to irradiate light for cultivating plants. A heat sink(700) is positioned on the top of the LED substrate in order to absorb heat emitted from the LEDs, and has a fluid path. The upper end of a 2-1 circulating pipe(810) is connected to one end of the fluid path of the heat sink in order to flow the culture medium in the culture medium tub into the heat sink. The upper end of a 2-2 circulating pipe(820) is connected to the other end of the fluid path of the heat sink in order to flow the culture medium in the heat sink into the culture medium tub. A heat absorbing block(710) has a substrate fitting groove(710-G1) for the LED substrate being inserted on the bottom and a zigzag type fluid path groove(710-G2) on the top. A cover plate(720) is tightly attached to the top of the heat absorbing block in order to seal the open top. LEDs comprise at least two kinds of LEDs among red light LEDs, blue light LEDs, green light LEDs, and white LEDs.본 발명은 식물 재배 장치에 관한 것으로, 식물을 재배하는 배양액을 배양액 수조로부터 재배용 베드로 순환시키는 제1 순환 구조와, 상기 배양액을 배양액 수조, LED가 설치된 열흡수부 및 상기 배양액 수조로 순환 시키는 제2 순환 구조를 구비함으로써, 배양액 수조 내의 배양액을 식물이 자라기 적합한 온도로 유지할 수 있는 배양액 이중 순환 구조를 갖는 웰빙형 엘이디 식물 재배 장치에 관한 것이다.
