JPH09271271A - Plant seedling high humidity processor and processing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the drying and shriveling of plant seedlings and a culture medium, to perform an excellent high humidity processing, to improve the yield of the seedlings, to save energy and to realize uniform indoor temperature distribution. SOLUTION: This high humidity processor for keeping an environment for accelerating the rooting of the seedling after grafting is provided with a cooler 2 arranged at an upper part inside a chamber and not equipped with a blowing means for generating a natural convection inside the chamber, a heater arranged at a lower part or on a wall surface inside the chamber and not equipped with the blowing means for generating the air flow of the natural convection inside the chamber and humidifiers 3 arranged symmetrically across the cooler 2 and provided with a fan 3a. Then, a humidity control means for operating the fan 3a of the humidifier 3 in the non-operation time band of the cooler 2 or the heater and generating a minute forced air flow 8-2 at the time of generating a thermal stratification inside the chamber is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant seedling high-humidity treatment apparatus and method, and is particularly suitable for energy saving and labor saving for maintaining an optimum environment for promoting rooting of plant seedlings after grafting. TECHNICAL FIELD The present invention relates to a high-humidity treatment device for plant seedlings and a method thereof.

[0002]

2. Description of the Related Art Conventionally, a high-humidity treatment apparatus for promoting seed germination, graft seedling survival, etc. has been disclosed in, for example, Japanese Patent Application Laid-Open No. 5-9573.
No. 3, Japanese Patent Laid-Open No. 7-203769, No. 6-
The technique described in Japanese Patent No. 72344 is known. JP 5
In the graft graft survival promoting device described in Japanese Patent Laid-Open No. 95733, a double wall is constituted by walls of a heat insulating structure, and a cooler is provided in the double wall.
As a passage for conditioned air obtained with a heater, a humidifier, etc., and the inner wall of the double wall surrounding the shelf frame that serves as the seedling storage part is used as a perforated plate and a suction perforated plate of the conditioned air, and forced airflow in the seedling storage part. To form.

Further, in the grafted seed acclimation device described in Japanese Patent Laid-Open No. 7-203769, cooling means,
The conditioned air obtained by the heating means is circulated by a fan, and the conditioned air can be ventilated into the room through the intake port and the exhaust port of the acclimation chamber. Furthermore, in the seedling raising device described in Japanese Utility Model Publication No. 6-72344, a wall surface surrounding the seedling raising room is a punching plate,
A space that forms a double chamber is provided by the outer wall and the punching plate, and a forced airflow is formed in the seedling raising chamber in the same manner as the graft graft survival promoting device described in JP-A-5-95733. In this device, devices such as a cooling coil, a heater, a humidifier, and a fan for blowing are arranged in the upper space of the space forming the double chamber.

In the seedling storage section, acclimatization room, and seedling raising room in these conventional techniques, a plurality of shelves, shelves, and the like on which plant seedlings to be grown are placed are provided, and a lighting device is provided for each step. Are arranged. Generally, the environmental conditions of the treatment space that promote the survival of grafted seedlings differ depending on the plant seedlings to be handled,
The temperature is controlled to about 24 to 28 ° C and the humidity is controlled to 90% or more.

[0005]

The high-humidity treatment devices such as the above graft graft survival promoting device, graft graft acclimatizing device, and seedling growing device are air-conditioned by cooling, heating and humidifying.
No consideration was given to energy saving, such as simultaneous cooling and heating. In addition, the wind forcedly blown by the air blower from the double wall (double chamber) directly hits the plant such as grafted seedlings, resulting in drying and wilting of the cultivation medium and plant, No consideration was given to the problem that the yield of growing seedlings was reduced.

When a large amount of plant seedlings are treated with high humidity, in the conventional plant racks such as shelf frames and shelf boards which are fixed indoors, each step is carried out during transportation from grafting to rooting and growing. There is a problem that labor is not saved due to work such as transshipment of trays each time. In order to solve this, it is conceivable that a moving rack truck with lighting installed on the upper shelf of the plant seedlings will be taken in and out of the room. The storage efficiency of the rack truck was poor.

Further, in the above-mentioned illuminated shelving vehicle, there are many risks such as damage of the illumination lamp at the time of loading and unloading into the processing chamber and connection of the power source in a room under a high humidity environment. Further, in the above-mentioned conventional high humidity processing apparatus, the humidity sensor is installed as the humidity detecting means in the room. As a result, when used for a long time in a high humidity environment, there was a problem that the humidity sensor deteriorates or condensation occurs on the sensor surface, the indoor humidity environment cannot be sensed correctly, and normal control processing is not performed. .

The present invention has been made to solve the above-mentioned problems of the prior art, and the first object of the present invention is to prevent the plant seedling and the medium from drying and wilting, and to improve the leaf surface of the plant seedling. Provide a high humidity treatment device for plant seedlings that enables good high humidity treatment by supplying weak air to the back of the plant, improves yield of seedlings, achieves energy saving, and realizes uniform indoor temperature distribution Especially.

Further, a second object of the present invention is that it is not necessary to carry in and carry out plant seedlings to and from the shelves indoors, which enables consistent handling by a moving carriage and lighting in a high humidity environment. Prevents leakage accidents due to power connection,
Another object of the present invention is to provide a plant seedling high-humidity treatment device capable of improving the storage efficiency by reducing the space between the shelves.

Further, a third object of the present invention is that there is no trouble due to erroneous detection of a humidity sensor, and optimum humidity control can be easily carried out at each step of growing plant seedlings, so that grafting seedlings can be easily established and acclimated. It is to provide a plant seedling high humidity treatment device.

[0011]

In order to achieve the above first object, the constitution of the first invention relating to the plant seedling high-humidity treatment apparatus of the present invention is an environment for promoting the rooting of plant seedlings after grafting. To keep at least the indoor cold and warm temperature, humidity,
In a high-humidity treatment device for controlling the amount of light, a cooler that is placed in the upper part of the room to generate natural convection in the room and is not equipped with a blower, and is placed in the lower part or the wall surface of the room to allow natural convection in the room. A heating source which is not equipped with a blowing means and is provided with a humidifier which is provided symmetrically with the cooling device and which is provided with a blowing means, and when a temperature stratification occurs in a room, Humidity control means for operating the air blowing means of the humidifier to generate a weak forced air flow during the non-operating time period is provided.

Further, in order to achieve the above first object,
The configuration of the first invention relating to the plant seedling high-humidity treatment method of the present invention is such that at least the indoor cold / warm temperature, humidity, and high humidity to control the light amount so as to maintain an environment that promotes the survival of the plant seedling after grafting. In the treatment method, a cooler which is arranged in the upper part of the room and is not equipped with a blowing means, and a heating source which is arranged in a lower part or a wall surface of the room and which is not equipped with a blowing means,
And a humidifier provided with an air blower, which is arranged symmetrically with the cooler interposed therebetween. The cooler or the heat source generates natural convection in the room, and when the temperature stratification occurs in the room, the cooling is performed. The air blowing means of the humidifier is operated during the non-operating time of the heater or the heating source to generate a weak forced air flow.

More specifically, the air conditioning for high humidity treatment of plant seedlings according to the first aspect of the present invention does not use forced ventilation by a blowing means, but rather a cooler that is not equipped with a blower fan installed in the upper part of the room and an indoor Natural convection is caused in the lower part, for example, in the lower part of the shelf on which the plant seedlings are placed or in the lower part of the side wall surface, which causes natural convection to prevent wilting and drying due to the air flow. In addition, the temperature thermostat installed in the room controls the cooling device and the heating source independently of each other without simultaneously activating them to save energy.

In this case, if the room temperature is within the temperature thermosetting range, depending on the outside air temperature and the operating conditions of the room lighting,
The so-called temperature stratification may occur in which the cooler and the heating source do not operate, the low temperature air stays in the lower part of the room, and the high temperature air stays in the upper part of the room. As a means for solving this temperature stratification, the indoor temperature is within the setting range of the temperature thermostat, the air blower of the humidifier symmetrically arranged in the room with the cooler sandwiched, in addition to the control by the humidity sensor, ,
The heating source is forcibly operated during the non-operating time, and the weak air circulation in the room causes the indoor temperature to be uniform.

In order to achieve the second object,
The configuration of the second invention relating to the plant seedling high-humidity treatment device of the present invention is, in the configuration of the above-mentioned first invention, arranging a large number of lighting means on the indoor wall surface and illuminating the plant seedling to be grown indoors. The above-mentioned plant seedling is brought in by carrying in by a trolley or a conveyor with a shelf which is not equipped with a means, and holding the trolley or the conveyor with a shelf in the room.

More specifically, in the case of large-scale processing of plant seedlings after grafting, as a means for saving labor and improving storage efficiency, a lighting device is arranged on the indoor wall surface and the shelf surface on which the plant seedlings are placed is arranged. On the other hand, it is configured to irradiate substantially horizontally. Further, the transportation of the plant seedlings into and out of the room is carried out manually or automatically by a rack truck without a lighting device or a roller conveyor to ensure safety.

Further, in order to achieve the above-mentioned third object, the constitution of the third invention relating to the plant seedling high humidity treatment apparatus of the present invention is the blowing means of the humidifier in the above-mentioned first and second inventions. The humidity control means for operating the
Timer for FF control and ON-O of 2 modes or more
The FF cycle and the means for switching the mode are provided, and the switching of the humidification time is performed by a timer that sequentially sets the humidification time from high humidity to low humidity at least within the time of the previous step.

More specifically, in order to solve erroneous detection of indoor humidity due to sensor deterioration and dew condensation, in the plant seedling high humidity treatment apparatus of the present invention, humidity control is performed by ON / OFF control of a humidifier by a timer. A humidity control device having an ON-OFF cycle of two or more modes and selecting the mode by a changeover switch, etc., and switching to a timer in which the humidification time is set in advance from high humidity to low humidity at least for all steps or less in advance. The control method is adopted.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. [Embodiment 1] An example of an embodiment of a plant seedling high humidity treatment apparatus according to the first invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic front view of a plant seedling high humidity treatment apparatus showing one embodiment of the present invention, and FIG. 2 is a schematic side sectional view of the apparatus of FIG.

In FIGS. 1 and 2, 1 is a heat insulating panel which constitutes the outer wall of the processing room of the plant seedling high humidity processing apparatus, 2 is a cooler installed in the upper part of the room, and this cooler 2 is a cooling machine. It is a fin-tube type that is composed of a tube and a large number of cooling fins, and is a so-called fin cooler that is not equipped with a blower fan. The cooler 2 is connected to a refrigerator 10 installed outdoors by a refrigerant pipe (not shown) of a refrigeration cycle. The cooler 2 is for generating a cold natural convection air flow 8-1 in the room.

Reference numeral 3 denotes a humidifier arranged symmetrically across the cooler 2. The humidifier 3 has a humidifier built-in fan 3a as a blowing means. More specifically, as shown in FIG. 2, the humidifier 3 is symmetrically fixed to the inner surface of the outer wall on both ends in the longitudinal direction of the cooler 2. Reference numeral 3b denotes a blower outlet for sending the humidified air to the cooler 2 by the built-in humidifier fan 3a as indicated by a dashed arrow.
Reference numeral c is a guide duct which serves as an auxiliary means for generating a weak forced airflow 8-2 when the blower 3a of the humidifier is operated. Reference numeral 4 indicates a temperature thermostat for detecting the indoor temperature.

Reference numeral 5 denotes a plant growing shelf (hereinafter simply referred to as a shelf) on which the plant seedlings placed in substantially symmetrical positions across the cooler 2 are placed. Each stage of the shelf 5 relates to a plant seedling, for example, The tray 9 which is a container for growing the seedling 9a after grafting is placed. 6 is a lighting device for irradiating the seedlings 9a on each stage of the shelf 5, 6a is a lamp constituting the lighting device 6, and 6b
Indicates a reflector that constitutes the lighting device 6.

Reference numeral 7 is an electric heater associated with a heating source arranged in the lower part of the room, for example, in the lower part of the shelf 5. The electric heater 7 is not equipped with a blower fan and generates a warm natural convection air flow 8-1 in the room. Here, it is desirable that the cooler 2 be installed at a position where cold air does not directly affect the seedlings 9a placed on the shelf 5, that is, at a ceiling portion of the indoor passage 1a or the like (see FIG. 1).

Next, the operation and effect of the plant seedling high humidity treatment apparatus having such a configuration will be described. When the indoor temperature rises due to lighting of the lighting device 6 or the rise of the outside air temperature, the temperature thermostat 4 detects the rise of the indoor temperature, and the refrigerator 10 operates to operate the cooler 2. The air cooled by the cooler 2 gradually descends below the cooler 2, and the seedlings 9 on each shelf 5 are collected.
After cooling a, it rises along the wall as indicated by the solid arrow and returns to the upper part of the room due to the heat of illumination or the flow-through heat entering through the wall due to the temperature difference between the outside air and the room. As a result, a natural convection airflow 8-1 is formed.

When heating is required, a similar natural convection airflow 8-1 can be obtained by the electric heater 7 located in the lower part of the room. Cooling and heating do not start at the same time, which saves energy. Here, in this example, the electric heater 7 is installed as a heating source in the lower part of the shelf, but the heating source is not limited to the electric heater. Further, the heating source may be installed at the lower part of the side wall, and as a result, a good air flow can be obtained.

As a result of temperature detection by the temperature thermostat 4, when the indoor temperature is within the set range, the humidifier of the humidifier 3 is used in order to prevent the temperature distribution in the upper and lower parts of the room from varying and to make the indoor temperature uniform by natural convection. The built-in fan 3a is operated to forcibly generate a weak air flow 8-2. As a result, the air flow in the room can be made uniform, so that energy loss such as operating the cooler 2 or the electric heater 7 can be prevented. Thus, by generating the weak airflow 8-2, a weak forced airflow is supplied to the back of the leaves of the seedling 9a,
It is possible to provide a favorable environment for raising seedlings, such as survival of seedlings 9a after grafting.

[Embodiment 2] Next, an example of an embodiment of a plant seedling high humidity treatment apparatus according to the second invention will be described with reference to FIG. FIG. 3 is a schematic front view of a plant seedling high humidity treatment device showing another embodiment of the present invention. In the figure, those having the same reference numerals as those in FIG. 1 are the same parts as those in the embodiment shown in FIG. In FIG. 3, 11
Is a moving carriage for placing the tray 9 of the seedling 9a on the shelf 5A and carrying it in and out of the room, and 11a is a wheel for moving the same.
Reference numeral 12 is a stopper for stopping and holding the movable carriage 11 at a predetermined position.

The illuminating devices 6A are not installed on the shelves 5A of the movable carriage 11, but are arranged in large numbers on the indoor wall surface of the heat insulating panel 1. The illumination device 6A is configured to irradiate the surface of the shelf 5A on which the tray 9 of the seedling 9a is placed substantially horizontally. Further, the electric heater 7 for generating natural convection when a heating load is generated is installed on the lower part of the side wall or on the floor near the side wall as in the previous example.

Therefore, since the seedling 9a is carried in and carried out indoors, the operator does not carry out the work of placing it on the shelf 5A and taking it out, and the moving carriage 11 is not equipped with electrical equipment such as a lighting device. It is possible to move the trolley safely. In addition, in the second embodiment, an example in which the movable carriage 11 is installed in the plant seedling high-humidity treatment chamber has been described, but it is also possible to provide equipment such as a portable roller conveyor.

According to the second embodiment, it is not necessary to carry the carry-in and carry-out of seedlings to and from the shelves indoors, and it is possible to carry out consistent handling by the moving carriage 11. In addition, since it is not a dolly with lighting, there is no risk of electrical leakage due to lighting power connection etc. in a room under high humidity environment. In addition, shelves 5
Since the part A is not illuminated, the space between the shelves can be reduced and the storage efficiency is improved.

[Embodiment 3] Next, an example of an embodiment of humidity control of the plant seedling high humidity treatment apparatus according to the third invention will be described with reference to FIG. FIG. 4 is a timer operation program showing an example of the mode switching of the humidification pattern by the timer. In FIG. 4, five patterns of the timer operation program are shown, and the ON-OF of the humidifier 3 is shown.
It shows that the F control cycle (humidification cycle) is switched by providing a timer of 5 patterns.

As shown in FIG. 4, the timer is set such that the ratio of the humidification time is smaller than that in the previous step. That is, pattern 1 is repeated for 25 minutes for humidifying operation and 5 minutes for stopping, and pattern 2 for the next step is for 20 minutes for humidifying operation and 10 minutes for stopping.
The pattern 3 of the repetition of the minute and the next step is the repetition of the humidifying operation for 15 minutes, the stop for 15 minutes, .... In addition,
The timer operating program of FIG. 4 shows an example, and is not limited to the ratio of the humidifying time and the stopping time shown in this humidifying pattern.

According to the third embodiment, high humidity processing can be performed without the trouble of erroneous detection by the humidity sensor. Further, the optimum humidity control can be easily performed only by switching the preset ON-OFF control cycles of two or more modes. In addition, the timer setting is changed from high humidity to low humidity for each plant seedling to be treated, that is, a timer setting is made such that the ratio of the humidification time of one cycle is reduced, and the steps are sequentially switched so that the seedling 9a after grafting can be established. Easily promoted.

In the above embodiment, the plant to be grown has been described by taking the example of promoting the survival of the seedling 9a after grafting, but the present invention is directed to germination of seeds and acclimation promotion adapted to the environment of the seedlings. And so on.

[0035]

As described in detail above, according to the first invention, it is preferable to prevent the plant seedling and the medium from drying and wilting, and to supply a weak wind to the back of the leaf surface of the plant seedling. It is possible to provide a plant seedling high-humidity treatment device that enables various high-humidity treatments, improves the yield of seedlings, achieves energy saving, and realizes a uniform indoor temperature distribution.

According to the second aspect of the invention, it is not necessary to carry in and carry out plant seedlings to and from the shelves indoors, which enables consistent handling by a moving carriage, and an illumination power source in a high humidity environment. It is possible to provide a plant seedling high-humidity treatment device capable of preventing an electric leakage accident due to connection and further reducing the space between shelves to improve storage efficiency.

Further, according to the third invention, there is no trouble due to erroneous detection of the humidity sensor, and optimum humidity control can be easily carried out in each step of growing plant seedlings, so that grafting seedlings can be easily established and acclimated. It is possible to provide a high-humidity treatment device for plant seedlings.

[Brief description of drawings]

FIG. 1 is a schematic front view of a plant seedling high humidity treatment apparatus showing an embodiment of the present invention.

2 is a schematic side sectional view of the device of FIG.

FIG. 3 is a schematic front view of a plant seedling high humidity treatment device showing another embodiment of the present invention.

FIG. 4 is a timer operation program showing an example of mode switching of a humidification pattern by a timer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Insulation panel, 2 ... Cooler, 3 ... Humidifier, 3a ... Fan with built-in humidifier, 3b ... Air outlet, 4 ... Temperature thermostat, 5, 5
A ... Shelf, 6, 6A ... Lighting device, 7 ... Electric heater, 8-1
... natural convection airflow, 8-2 ... weak airflow, 9 ... tray,
9a ... Seedling, 10 ... Refrigerator, 11 ... Mobile cart.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hakuyuki Tokura 508-8 Toyoyomizusanda, Kashiwa-shi, Chiba Prefectural Institute of Environmental Technology, Hitachi Cold Thermal Co., Ltd. No. 27 Hitachi Cold Energy Co., Ltd.Kansai Branch

Claims (6)

[Claims] 1. At least the indoor cooling / heating temperature, humidity, and temperature in order to maintain an environment that promotes the survival of plant seedlings after grafting.
In a high-humidity treatment device that controls the amount of light, a cooler that is placed in the upper part of the room to generate natural convection in the room and is not equipped with a blower, and is placed in the lower part or the wall surface of the room to generate natural convection in the room. A heating source that is not equipped with a blowing means and that is provided with a humidifier that has a blowing means and that is symmetrically arranged across the cooler is provided, and when the temperature stratification occurs in the room, A plant seedling high humidity treatment apparatus comprising a humidity control means for operating a blowing means of the humidifier during a non-operating time period to generate a weak forced air flow. 2. The apparatus according to claim 1, wherein a large number of lighting means are arranged on the wall surface of the room, and the plant seedlings to be grown indoors are carried in by a trolley with a shelf or a conveyor not equipped with the lighting means, and the shelves are carried. A plant seedling high-humidity treatment device, characterized in that an attached carriage or a conveyor is held indoors to grow the plant seedlings. 3. The humidity control means for operating the air blowing means of the humidifier according to claim 1, wherein the humidity control means operates a timer for ON / OFF control of the humidifier, and an ON-mode having two or more modes. A plant seedling high humidity treatment apparatus comprising an OFF cycle and a means for switching the mode. 4. The plant seedling high humidity treatment according to claim 3, wherein the switching of the humidification time is performed by a timer in which the humidification time is sequentially set from high humidity to low humidity for at least the time of the previous step. apparatus. 5. In order to maintain an environment that promotes the survival of plant seedlings after grafting, at least the indoor cooling and heating temperature, humidity,
In a high-humidity treatment method for controlling the amount of light, a cooler that is arranged in the upper part of the room and is not equipped with air blowing means, and a heating source that is arranged in the lower part or wall surface of the room, that is not equipped with air blowing means, and the cooler. And a humidifier equipped with an air blower, which is arranged symmetrically with respect to each other, wherein natural convection is generated in the room by the cooler or the heat source, and when the temperature stratification occurs in the room, the cooler or the heat source. The method for treating high-humidity plant seedlings, characterized in that the blower means of the humidifier is operated during the non-operating time period to generate a weak forced air flow. 6. The method according to claim 5, wherein the humidity control for operating the blower means of the humidifier is performed by ON-OFF control of the humidifier by two or more modes by a timer, and at least the time of the previous step or less. A method for treating high humidity of plant seedlings, characterized in that the humidifying time is switched by a timer that sequentially sets the humidifying time from high humidity to low humidity.