JPH01124378A - Apparatus for determination and control of temperature and humidity in raising seedling box - Google Patents

Abstract

PURPOSE:To conveniently perform a raising seedling test, by accurately determining average temperature and humidity in a raising seedling box and easily controlling the temperature and humidity. CONSTITUTION:A sensor 5 for thermometer and hygrometer 4 is placed in the middle of a gas circulation line 3 for extracting the gas from a raising seedling box 1 and returning again to the raising seedling box 1. An air flow regulation valve 15 is provided in the middle of an air feeding line 12 to supply the box 1 with dried air. A temperature controlling means 9 is attached to one or both of the gas circulation line 3 and the air feeding line 12. The temperature and humidity of the gas can be easily controlled and the raising seedling test can be conveniently performed by the user of the apparatus.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the growth of cloned seedlings in plant tissue culture,
This invention relates to a device that measures and controls the temperature and humidity of gas in a seedling box during the acclimatization process.

[Conventional technology and its problems]

Recently, research on plant tissue culture has become active. In such plant tissue culture, it is important to control the gas environment, and in particular, in the growth and acclimatization process of cloned seedlings, it is important to control carbon dioxide gas at 4 degrees Celsius, as well as temperature and humidity.

In other words, in the early stages of plant tissue culture, it is customary to keep the gas temperature constant, but once photosynthesis is actively occurring to a certain extent, the preferred gas temperature changes between bright and sunny conditions, and changes depending on other environmental conditions. There are also differences depending on the balance between
Variable temperature management is required. In addition, if the humidity is extremely high, the cuticle layer of the leaves of cloned seedlings will not be fully developed and the water stress resistance during the acclimatization stage will be reduced, so it is necessary to control the humidity.

In the case of seed factories, which have recently become a hot topic, such temperature and humidity adjustments are made by measuring temperature and humidity with temperature and humidity meters installed in the nursery room, and then controlling the operation of cooling and heating equipment and dehumidifiers and humidifiers. It is done by controlling. However, the temperature and humidity inside the growing room vary depending on the location, so as mentioned above, the temperature and humidity inside the growing room
Even if a 78 degree meter is installed and measured, it only measures the local temperature and humidity in the surrounding area, and does not measure the average temperature and humidity of the entire growing room.
This does not mean that the humidity has been accurately measured.Therefore, even if you adjust the temperature and humidity based on such inaccurate measurements, it cannot be said to be sufficient. automatic control is not so easy.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to maintain the average temperature throughout the inside of the seedling growing box.
It is an object of the present invention to provide a temperature/humidity measurement and control device for a seedling growing box that can measure humidity more accurately and control it more easily.

[Means to achieve the purpose]

In order to achieve the above object, the device of the present invention provides a temperature/hygrometer sensor in the middle of the gas circulation path that takes out the gas in the seedling growing box and returns it to the seedling growing box, and also supplies dry air to the seedling growing box. The present invention is characterized in that an air flow rate regulating valve is provided in the middle of the air supply path, and a temperature regulating means is provided in the middle of either or both of the gas circulation path and the air supply path. .

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic explanatory diagram showing the overall configuration of a temperature/humidity measurement control device for a seedling raising box according to an embodiment of the present invention.

- In the figure, l is a seedling raising box made of colorless and transparent synthetic resin such as polycarbonate or polyester sarcon, or glass, and a seedling bed 2 is provided in the lower part of the inside of the box. A gas circulation path 3 is connected to the top plate of the seedling growing box 1, which takes out the gas in the seedling growing box 1 and returns it to the seedling growing box 1 again. A sensor 5 of a temperature/hygrometer 4 is provided in the middle of this gas circulation path 3, and further includes an oxygen concentration meter 6, a carbon dioxide concentration meter 7, an ethylene gas concentration meter 8, a chiller unit 9 as a temperature control means, and a filter. 10 are provided. The concentration meter has a pump unit (not shown), and the pump unit circulates the gas inside the seedling growing box I. In addition, inside the seedling raising box 1, there are a plurality of air holes (
A perforated cylinder 11 (not shown) is provided to hang down from the outlet of the top plate of the seedling raising box 1, and its lower end reaches close to the seedling bed 2.

12 is a seedling raising bowl using dry air from an air cylinder 13.

A pressure reducing valve 14, an air flow 1m11 control valve 15, and a filter 16 are provided in the middle of the air supply path 12 for supplying air to the box 1. Also, 17 is the temperature/hygrometer 4
18 is a controller that controls the air flow rate control valve 15 by receiving a signal regarding humidity from the controller, and 18 is an artificial light source 18a such as a fluorescent lamp that emits daylight color, which is attached to a support 18b and is caused to swing together with the support 18b. This lighting device is configured to emit light more uniformly. 2° is a culture solution supply path, 21 is a culture solution discharge path, and 22 is a gas supply path for supplying environmental adjustment gas such as carbon dioxide gas or ethylene gas.

In the apparatus configured as described above, the gas in the seedling raising box 1 is sucked by the pump unit from each suction hole of the perforated tube 11 and is led out to the gas circulation path 3. The temperature and humidity of the gas are detected by the sensor 5, and the concentrations of oxygen, carbon dioxide, and ethylene gas are measured by the respective concentration meters 6, 7, and 8, respectively. After the measurement, the temperature of the gas is adjusted by a chiller unit 9, foreign substances are removed by a filter 10, and the gas is returned to the seedling growing box 1. If the sensor 5 of the temperature/hygrometer 4 is not provided inside the seedling growing box 1 but is incorporated into the external gas circulation path 3, the gas inside the seedling growing box 1 will be stirred and almost homogenized by gas circulation. In addition, since gas can be sucked and extracted from several locations above and below inside the seedling growing box l through each suction hole of the perforated tube 11, it is possible to more accurately measure the average temperature and humidity inside the entire seedling growing box l. becomes.

The temperature and humidity of the gas measured by the sensor 5 are measured by the temperature/hygrometer 4.
The humidity is displayed digitally, and a signal regarding humidity is sent to the controller 17. This controller 17 compares the measured value of humidity with a pre-input set value, and adjusts the air flow ft1li1 control valve 15 so that the two match.
A signal for controlling the opening degree of is sent to the air flow Wi control valve 15. Therefore air flow! The opening degree of the ff1 regulating valve 15 is automatically controlled, the flow rate of dry air supplied from the air cylinder 13 to the seedling growing box 1 is adjusted, and the humidity in the seedling growing box 1 is adjusted and maintained at a set value. Therefore, the humidity inside the seedling growing box 1 can be automatically adjusted to the desired humidity by simply changing the setting values of the controller.Although this device does not have a means to increase the humidity, the supply of dry air can be stopped. Alternatively, if the amount is extremely small, the humidity will naturally rise due to evaporation of the culture solution that always remains at the bottom of the seedling raising box 1, so there is no need to provide a humidifying means.

On the other hand, the temperature inside the seedling growing box 1 is controlled by a temperature/hygrometer 4.
This is done by adjusting the temperature of the chiller unit 9 without looking at the temperature displayed on the screen, and cooling or heating the gas flowing through the gas circulation path 3 to a predetermined temperature with the chiller unit 9.

Although the above embodiment is configured to automatically control the humidity, by omitting the controller and incorporating a manual air flow meter in place of the air flow control valve 15, the humidity display on the temperature/hygrometer 4 can be controlled. The supply amount of dry air may be controlled by manually operating the air flow meter while observing the air flow meter.
Further, in the above embodiment, the temperature is controlled by a chiller unit that manually adjusts the temperature, but it goes without saying that it may be configured to be automatically controlled by a controller as in the case of temperature. , in the above example,
A chiller unit 9 is incorporated into the gas circulation path 3 as a temperature control means, and this chiller unit is connected to the air supply path 12.
It may be incorporated into the gas circulation path 3 and the air supply path 12 if necessary. It goes without saying that the A means is not limited to the chiller unit, and other known heaters, various coolers, etc. may be used.

〔Effect of the invention〕

As is clear from the above explanation, the device of the present invention can more accurately measure the average temperature and humidity of the gas inside the seedling growing box,
Since it can be controlled more easily, it is extremely convenient when conducting seedling-raising tests.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing the overall configuration of an embodiment of the present invention. ■... Seedling raising box 3... Gas circulation path 4... Temperature/hygrometer, 5... Sensor, 9... Chiller unit (temperature control means), 11... Perforated tube, 12. ...Air supply path, 15...Air flow control valve, 17...Controller. Patent applicant Yasushi Watanabe Fujikin Co., Ltd.

Claims (1)

[Claims] (1) A temperature/hygrometer sensor is installed in the gas circulation path that takes out the gas in the seedling growing box and returns it to the seedling growing box, and air flow rate is adjusted in the middle of the air supply path that supplies dry air to the seedling growing box. A temperature/humidity measurement and control device for a seedling box, characterized in that a valve is provided and a temperature control means is provided in the middle of one or both of the gas circulation path and the air supply path.