| 摘要 |
<p>The present invention relates to a temperature maintaining device for cultivation under structures which heats and cools a facility by supplying heat emitted by a heat source (1) to the inside of a facility and includes a thermal medium pipe (100) which is connected to the heat source (1) and composed of an outer pipe (10) with first passages (12) and an inner pipe (20) which is inserted into the first passage (12) and which includes second passages (22). The first and second passages (12, 22) on one end of the thermal medium pipe (100) are mutually connected and the first and second flow passages (12, 22) on the other end thereof are connected to an outlet (1a) and an inlet (1b) of the heat source (1) so that thermal medium are circulated. Therefore, the temperatures of each section of the thermal medium pipe are uniformly maintained by an heat exchange between the thermal media as the thermal medium are supplied or recovered via the first and second passages formed on the single thermal medium pipe so that the inner temperature of the facility is generally and uniformly maintained and crops can be uniformly grown.</p> |
