JPH0254Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for controlling the carbon dioxide concentration in, for example, a vinyl greenhouse for cultivating plants.

[Conventional technology]

Normally, the concentration of carbon dioxide in the atmosphere is around 300 ppm, but if this concentration is increased from higher than this to around 2000 ppm, carbon dioxide assimilation will become more active in plants.
It is well known that its growth is promoted.
Therefore, when cultivating plants using a vinyl greenhouse or the like, for example, it is advantageous to increase the carbon dioxide concentration in the greenhouse to improve the cultivation efficiency. For this reason, a method has been used in which the carbon dioxide gas in the greenhouse is directly aerated, and the concentration is controlled by detecting the carbon dioxide gas in the greenhouse and operating a gas control valve.

[Problem that the invention attempts to solve]

However, it is desirable that the carbon dioxide concentration in the greenhouse be uniform so that it is not unevenly distributed, and since the concentration is in ppm units, a relatively small-scale implementation is
Although the above method is possible, satisfactory results cannot be obtained in a large scale case of 100 m ³ or more.

For this reason, the present invention provides an apparatus that can uniformize the concentration within the greenhouse even in the case of a large-scale greenhouse, and can control the concentration even in ppm units.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a carbon dioxide gas dissolving means that connects a carbon dioxide gas container and a nozzle pipe in the lower part of the water tank with piping to aerate carbon dioxide gas into the water in the water tank, and a plastic greenhouse. A degassing means is provided inside the water tank, which is connected to the bottom of the water tank via piping, and includes a spouting mechanism for jetting out carbon dioxide gas-dissolved water, and a drainage tray facing the jetting mechanism at an appropriate distance to receive the spouted water. In addition, a water circulation means is provided in which the drainage tray and the upper part of the water tank are connected via piping via a pump, thereby easily and automatically equalizing the carbon dioxide concentration in the greenhouse. It has been made possible.

〔Example〕

An example of the present invention will be explained with reference to the following figures.
This embodiment includes a carbon dioxide dissolving means, a degassing means,
1 is a carbon dioxide gas container, 2 is a water tank, 3 is an ejection mechanism equipped with a large number of nozzles provided in the house H, and 4 is opposed to the ejection mechanism 3 with an appropriate gap. This is a drainage tray that is provided to receive water ejected from the ejection mechanism 3.
The carbon dioxide gas container 1 is connected to a nozzle pipe 7 at the bottom of the water tank 2 via a gas supply pipe 6 having a solenoid valve 5.
Carbon dioxide gas in the container 1 is aerated through the supply pipe 6 into water stored in an appropriate amount in the water tank 2. The aerated carbon dioxide gas is dissolved in the water, but some undissolved carbon dioxide gas remains in the upper space of the water tank 2. (Means for dissolving carbon dioxide gas).

Next, the bottom of the water tank 2 and the ejection mechanism 3 provided in the house H are connected by a pipe 9 having a solenoid valve 8, and the stored water in which carbon dioxide gas is dissolved in the water tank 2 is made up of a large number of ejection mechanisms 3. The water is ejected from the nozzle under atmospheric pressure, and at this time the carbon dioxide dissolved in the water is degassed. The ejected water falls and collects on a drainage tray 4, which is provided opposite the ejection mechanism 3 and at an appropriate interval, and flows through the house H while further removing carbon dioxide gas. (Degassing means) This drainage tray 4 is connected to a nozzle pipe 12 provided in the space above the water tank 2 by a piping 11 via a water pump 10, and the water collected in the drainage tray 4 is It is ejected from the upper part of the water tank 2 through the pipe 11 and circulated. (Water Circulation Means) Note that 13 is a pressure gauge which detects the pressure inside the water tank 2 and operates to open and close the solenoid valve 5 based on the signal to keep the internal pressure of the water tank 2 constant.
Reference numeral 14 denotes a carbon dioxide gas concentration meter, which detects the carbon dioxide concentration within the house H, and controls the carbon dioxide concentration of the atmosphere within the house H by opening and closing the electromagnetic valve 9 according to instructions from this meter.

[Effect of idea]

As described above, the present invention dissolves carbon dioxide in water using the carbon dioxide gas dissolving means that connects the carbon dioxide gas container and the nozzle pipe in the lower part of the water tank via piping, and then connects the carbon dioxide gas container and the nozzle pipe in the bottom of the water tank via piping. The ejection mechanism installed inside the house blows carbon dioxide dissolved water into the house and deaerates it to increase the carbon dioxide concentration, so the carbon dioxide gas supplied into the house The amount is substantially much smaller than that of the commonly used gas control valve system, making it easy to control the concentration on the order of ppm. Moreover, since the carbon dioxide gas is supplied by degassing over a wide range, the concentration can be made uniform, which makes it easier to control concentration maintenance.

[Brief explanation of the drawing]

The figure is a system diagram showing an embodiment of the present invention. 1... Carbon dioxide gas container, 2... Water tank, 3... Blowout mechanism, 4... Drainage tray, 6... Gas supply pipe, 9
...Piping, 10...Pump, 11...Piping.

Claims (1)

[Scope of utility model registration request] A carbon dioxide gas container and a nozzle pipe in the lower part of the water tank are connected by piping, and a carbon dioxide gas dissolving means for aerating carbon dioxide gas into the water in the water tank is connected to the bottom of the water tank in the interior of a vinyl house, etc. by piping. and a degassing means consisting of a jetting mechanism for spouting carbon dioxide gas-dissolved water and a drainage tray facing the jetting mechanism at an appropriate interval and receiving the jetted water, and connecting the drainage tray and the upper part of the water tank. A carbon dioxide concentration control device for a greenhouse, etc., characterized by having a water circulation means connected by piping via a pump.