Plant growing device

Abstract

A plant growing device (1) is provided with a ventilation unit (6) comprising an intake unit (61) for taking air into a growing chamber (R) and an exhaust unit (62) for exhausting air from the growing chamber (R). The intake unit (61) has an intake port (63), an intake damper (64) for opening and closing the intake port (63), a blower (65) for sending air in the direction of the growing chamber (R), a passage (66) for guiding air to the upstream side of the blower (65), and a circulation damper (67) for opening and closing the passage (66). The exhaust unit (62) has an exhaust port (68) and an exhaust damper (69) for opening and closing the exhaust port (68). The ventilation unit (6) operates under either an intake and exhaust mode for taking air into and exhausting air from the growing chamber (R) or a circulation mode in which air is caused to circulate in the growing chamber (R). By switching between these modes, CO2 is taken into the growing chamber (R) and gas density, temperature, and humidity within the growing chamber (R) can be made uniform, and as a result, the growing efficiency of a plant (P) can be improved.

Description

technical field [0001] The present invention relates to a plant growing device provided with a growing chamber for growing plants. Background technique [0002] Conventionally, there is known a plant growing device provided with a growing chamber for growing plants (for example, refer to Patent Document 1). Such a device is provided with an exhaust port for exhausting air from the cultivation chamber to the outside, a blower blowing air to the exhaust port, and an air suction device arranged at a position opposite to the exhaust port for sucking air from the outside into the cultivation chamber. mouth, and a light source for illuminating the plants. When the blower is operated, air is discharged from the exhaust port, and the cultivation chamber becomes negative pressure. As a result, air is sucked into the cultivation chamber from the suction port, and the cultivation chamber is ventilated. [0003] prior art literature [0004] patent documents [0005] Patent Document...

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned plant cultivation device, when the air blower is not in operation, oxygen generated by photosynthesis remains above the cultivation chamber, and carbon dioxide, which is heavier than oxygen and required for photosynthesis, remains below the cultivation chamber. Plant leaves do not get enough carbon dioxide

Therefore, the efficiency of photosynthesis becomes poor, and the cultivation efficiency of plants decreases

In addition, when air is not being sucked, the temperature and humidity in the cultivation room become uneven due to heat emitted from the light source, for example, which may also adversely affect the cultivation of plants.

On the other hand, if the suction is always performed, it becomes difficult to control the temperature in the cultivation chamber

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