JP2012115256A - Cooling apparatus and cooling method for plant cultivation chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling apparatus for cooling the inside of a greenhouse for cultivating plants by spraying micro mist, when it is superheated.SOLUTION: An intake blower with a nozzle is installed at least one side out of the lower part and the middle high part of the greenhouse. The outlet side of the intake blower locating inside of the greenhouse is brought to be lateral when it is installed to the lower part, while it is brought to be inclined downward when it is installed to the middle high part. The nozzle is attached to the outlet side and spraying is carried out into the greenhouse from the nozzle, and at the same time, the spraying is put on an air blow discharged from the intake blower, while an exhaust blower for exhausting air in the greenhouse to the outside is installed to the upper part of the greenhouse, and the relative positional relation of the intake blower with the nozzle to be installed to the inside of the greenhouse and the exhaust blower to be installed to the upper part of the greenhouse is set so that the spraying from the nozzle can circulate inside of the greenhouse.

Description

  The present invention relates to a cooling apparatus and a cooling method for a plant cultivation room. More specifically, the present invention cools to an appropriate temperature when the temperature in the greenhouse for plant cultivation rises from the appropriate temperature of the cultivated plant.

In a greenhouse for plant cultivation such as a vinyl house for plant cultivation and a plant cultivation factory, the temperature may be higher than the proper cultivation temperature of the cultivated plant at high temperatures such as in summer. Thus, when the temperature in a greenhouse rises excessively, various proposals for cooling the inside of the greenhouse to obtain a proper cultivation temperature have been made.
For example, there is a fine fog cooling method in which water is sprayed from a nozzle toward a greenhouse. In the fine fog cooling method, water is supplied through a pipe to a nozzle installed in a greenhouse, and the temperature in the greenhouse is lowered by spraying water from the nozzle. This fine fog cooling method has the advantage that the equipment is simple and the cost is lower than that of an air conditioner.

  However, the fine fog cooling method vaporizes the sprayed mist in the vicinity of the nozzle to take away latent heat and lower the ambient temperature, but the cooling effect in a remote area is low. Therefore, a temperature difference is generated inside the greenhouse and an air current is generated, so that non-evaporated water droplets sprayed from the nozzle easily adhere to the cultivated plant. If spraying is continued under high temperatures such as in the summer, water droplets always adhere to cultivated plants in a specific region, causing problems that the plant is likely to cause disease and the growth of the plant is suppressed.

With respect to the above problem, in the cooling apparatus for a greenhouse presented in Japanese Patent No. 4431789, a nozzle that generates fine mist is installed upward, and a blower that generates turbulent flow is installed below the nozzle. And it has installed above the plant community which grows this air blower and a nozzle.
Since the spray from the nozzle is diffused upward by the blower and the water droplets are evaporated above the nozzle arrangement position, it is possible to suppress or prevent non-evaporated water droplets from adhering to plants below the nozzle and the blower. Can do.

Japanese Patent No. 4431789

In the cooling device of Patent Document 1, it is possible to suppress or prevent the non-evaporated water droplets sprayed from the nozzle from adhering to the plant, but because the cold air containing moisture is not circulated throughout the greenhouse, the cultivation zone The temperature and humidity cannot be controlled quickly. In particular, since cold air does not circulate in the lower part of the greenhouse in which the cultivated plant is installed, the plant is not exposed to a proper cooling temperature but is exposed to a high temperature.
Furthermore, the upper part of the plant to be cultivated is filled with fog, and the necessary sunlight and illuminance are reduced by the upper fog, which may cause the plant to grow poorly.

  The present invention solves the above problems, efficiently cools the cold air generated by spraying from the nozzle by circulating it inside the greenhouse, and suppresses or prevents non-evaporated water droplets sprayed from the nozzle from adhering to the cultivated plant. The challenge is to do.

In order to solve the above-mentioned problems, the present invention provides an intake fan with a nozzle installed in at least one of a lower part and a middle / high part in a greenhouse, and a discharge side located in the greenhouse of the intake fan is installed in the lower part. If it is to be sideways and installed in the middle and high part, it is inclined downward, and a nozzle is attached to the discharge side, sprayed into the greenhouse from the nozzle and placed on the air blown from the intake blower,
An exhaust fan for exhausting the air in the greenhouse to the outside is installed at the top of the greenhouse,
The relative positional relationship between the nozzle-equipped intake blower installed in the greenhouse and the exhaust blower installed in the upper portion is installed such that the spray from the nozzle circulates in the greenhouse. A cooling device for a plant cultivation room is provided.

  As described above, the intake fan with the nozzle (intake fan) and the exhaust fan (exhaust fan) are arranged in the greenhouse to forcibly circulate the air in the greenhouse, Can be cooled. In addition, the spray from the nozzle increases the injection distance by the air blown from the air intake blower, and the wind speed is increased by the resultant force of the air blowing discharge force from the air intake blower and the nozzle injection force. Thus, by increasing the spray distance of the mist and increasing the wind speed of the mist, the mist can be circulated quickly in the greenhouse, and the evaporation of the mist can be efficiently performed throughout the greenhouse. Therefore, it is possible to suppress or prevent the non-evaporated water droplets from adhering to the cultivated plant, and to quickly cool the inside of the greenhouse.

The intake blower with nozzle is provided with a duct attached to the intake side of the blower, and the duct extends to an opening provided in a greenhouse wall to directly suck outside air from the duct, or a window provided on the outer wall of the greenhouse. It is preferable to install in the vicinity and suck the outside air introduced from the window.
It is preferable that the exhaust fan is installed on a ceiling of a greenhouse, and a fine mist that fills the lower part of the greenhouse with the suction fan with nozzle is drawn into the ceiling by the exhaust fan.
The number of installed exhaust fans and the installation position may be set according to the size of the greenhouse. If the greenhouse is relatively small, one exhaust fan may be installed at the center of the ceiling.

  The nozzle-equipped intake blower is installed on the outer peripheral wall, four corners or / and doors of the greenhouse, and the spray direction of the nozzle attached to the discharge side of the intake blower located indoors is such that the spray covers the entire greenhouse. I have to.

  When the greenhouse is relatively large, the air intake blowers with nozzles are arranged at the four corners of the lower part of the greenhouse and / or the middle and upper parts, and are installed in a staggered manner along the opposing outer walls, and the spray from the nozzles is placed in the greenhouse. It arrange | positions so that it may be filled over the whole area of the vertical and horizontal direction. Furthermore, when the greenhouse is wide, it is preferable to arrange an air intake blower with nozzles and / or nozzles at a required interval on the outer peripheral wall of the greenhouse and the central part of the greenhouse.

In the case of a cultivated plant having a high height at the time of growth, the blower for suction with a nozzle is installed at a height position of the middle and high parts, and is located at a spatial position between rows of cultivation beds and an outer wall on one side of the greenhouse. Installed diagonally downward in the same direction in the center of the greenhouse,
It is preferable that an exhaust fan for sucking spray from the intake fan with nozzle is installed at the lower part of the opposing outer wall.
As described above, spraying downward between the cultivation beds is to prevent spraying directly on the leaves of the plant.

The intake fan with nozzle may be a swing type that rotates in the vertical direction or the horizontal direction.
Specifically, if the plant to be cultivated is a leafy vegetable or strawberry with a low height, install it at the bottom, swing it to the left and right, and if it is a tall tomato, cucumber, etc. It is preferable to set it to a type that can be tilted to the left and right and swing in the left-right direction.
Furthermore, the nozzles arranged at the four corners of the greenhouse may be a swing type in the left-right direction, and the nozzles arranged in a staggered manner on the opposing peripheral walls may be a swing type in the vertical direction. The head swing may be either automatic or manual.
You may install the air blower with a nozzle in both a lower part and a middle-high part, and may use it properly according to the plant to grow. Further, when the temperature in the greenhouse rises excessively, the inside of the greenhouse may be quickly cooled by spraying from both nozzles installed at the lower part and the middle-high part.

The driving of the blower for intake and exhaust and the spray from the nozzle can control the start and stop of intake, exhaust and spray based on detection data detected by a temperature and humidity sensor installed in the greenhouse. preferable. For example, when the temperature in the greenhouse reaches 30 ° C., intake, exhaust, and spraying are started, and when the temperature is less than 30 ° C. or the humidity reaches 80% or more, the nozzle spraying and driving of the blower are stopped.
Furthermore, the weather conditions outside the greenhouse may be detected, and may not be operated during rainy weather, but may be operated only during fine weather, and dried outside air may be introduced into the greenhouse with an intake fan.

The nozzle attached to the intake fan is preferably a nozzle that injects as a semi-dry fog containing water droplets having an average particle size of 30 μm or less. The nozzle may be a one-fluid nozzle that ejects only water, but may be a two-fluid nozzle that ejects water and air.
Thus, when the water droplet sprayed from the nozzle installed in the greenhouse is a fine mist of fine particles, it is preferable that the water droplet evaporates quickly in the greenhouse, and the large, non-evaporated water droplet does not easily adhere to the plant.
Especially as this nozzle, the nozzle which injects as a semi-dry fog containing the water droplet whose average particle diameter is 10 micrometers or more and 30 micrometers or less is used suitably.
Dry fog is a non-wetting mist that floats in the air and does not adhere to an object. Semi-dry fog is a mist that adheres to an object but evaporates immediately.

  The greenhouse may be formed of any of a vinyl house for plant cultivation, a glass house, a plant factory, and the like. Moreover, the cultivation method of the plant in this greenhouse is not specified.

  Furthermore, the present invention introduces outside air into the greenhouse with an intake fan, exhausts the air in the greenhouse to the outside with an exhaust fan, and discharges the spray from the nozzle installed in the greenhouse from the intake fan. A cooling method for a plant cultivation room is provided, which is circulated in a greenhouse and led to the exhaust fan side by being placed on the air blow.

  As described above, when the mist sprayed from the nozzles in the greenhouse is circulated through the greenhouse with the intake blower and the exhaust blower installed in the greenhouse, the water droplets are evaporated throughout the greenhouse and the greenhouse is exhausted. The inside can be cooled evenly, and it is possible to suppress and prevent non-evaporated water droplets from adhering to the plant.

  As described above, in the present invention, an intake blower with a nozzle and an exhaust blower are installed in a greenhouse, the air in the greenhouse is forced to circulate and ventilate, and evaporation of fine mist sprayed from the nozzle into the greenhouse The efficiency can be increased, the temperature can be lowered by the heat of vaporization throughout the greenhouse, and the non-evaporated water droplets can be suppressed and prevented from adhering to the plant.

It is a schematic plan view which shows the greenhouse of 1st Embodiment of this invention. It is a schematic front view of the greenhouse of FIG. An air blower with a nozzle is shown, (A) is a right side view, (B) is a front view, and (C) is a left side view. (A) (B) is drawing which shows the nozzle attached to the air blower for intake. A 2nd embodiment is shown, (A) is a schematic plan view and (B) is a schematic front view. A 3rd embodiment is shown, (A) is a schematic plan view and (B) is a schematic front view. It is a perspective view of 4th Embodiment. (A) is a schematic front view of the fourth embodiment, and (B) is a schematic plan view. It is a side view of the air blower with a nozzle used in 5th Embodiment. (A) and (B) are schematic views showing a sixth embodiment.

Hereinafter, an embodiment of a cooling device of a cultivation room of the present invention is described with reference to drawings.
1 to 4 show a cooling apparatus for a plant cultivation room according to the first embodiment.
1st Embodiment is related with the air conditioner in the greenhouse 2 enclosed by the plant cultivation house 1 which consists of vinyl houses.
In the greenhouse 2, a cultivation bed 9 of a relatively short plant P made of leaves and strawberries is arranged, and the height of the cultivation bed 9 is about 1 m. The cultivation bed 9 is a medium, and the plant P is rooted.
As shown in the figure, the greenhouse 2 has a rectangular horizontal cross section, is surrounded by the peripheral walls 2a to 2d and the ceiling 2s, and is provided with doors and windows at appropriate positions on the peripheral walls 2a to 2d.

  Windows 2h are provided at the four corners in the greenhouse 2, and air intake blowers 3 (3A to 3D) with nozzles are installed facing the portion through which outside air is introduced from the windows 2h. An exhaust fan 4 is attached to the center of the ceiling 2s.

  The air blower 3 with each nozzle is configured as shown in FIGS. 3 (A), (B), and (C). The intake blower 3 includes a ring header 6 facing the central side of the greenhouse 2, and a plurality of nozzles 5 are attached to the ring header 6 at regular intervals.

  Each intake blower 3 has a bracket 3c projecting from the upper end of a frame 3b projecting from the base 3a, and a support portion 3e projecting from the back surface of the circular fan 3d is provided on the bracket 3c in the vertical direction via a rotating shaft 3f. It is attached so that it can rotate. The support portion 3e can swing in the vertical direction by operating the handle 3u. In addition, the lower end of the frame 3b is fixed to the rotating plate 3r, and the rotating plate 3r is reciprocally rotated at an angle of 90 degrees in the horizontal direction by a motor (not shown) accommodated in the base 3a. I can swing it. The motor is an automatic swing mechanism that is turned on by a swing switch 3s.

A motor 3h connected to a power cord 3g is connected to the center of the rear surface of the fan 3d, and the blades 3i of the fan 3d are rotated by the motor 3h, sucked from the rear side, and discharged from the front side.
The ring header 6 is attached to the front surface of the annular frame 3k protruding to the front side of the fan 3d and connected to the pipe 3j.
The installation height of the fan 3d is set to be equal to or lower than the upper surface position of the cultivation bed 9, and is disposed relatively lower in the greenhouse 2.

  As described above, the intake blower 3 is installed at the four corners of the greenhouse 2 provided with the window 2h, the outside air introduced from the window 2h is sucked by the intake blower 3, and the sucked outside air is discharged into the greenhouse 2. It is supposed to be. It sprays toward the center side of the greenhouse 2 from the nozzle 5 fixed to the ring header 6 on the indoor surface side of the air blower 3.

  As the nozzle 5, a one-fluid nozzle shown in FIGS. 4A and 4B is used. The one-fluid nozzle 5 sprays only water and generates a semi-dry fog of 10 μm to 30 μm. Even if the mist sprayed from the nozzle 5 is a semi-dry fog, water drops do not fall and can be suspended in the air of the hollow portion. The nozzle 5 is not limited to a one-fluid nozzle and may be a two-fluid nozzle.

  As the one-fluid nozzle 5, a nozzle disclosed in Japanese Patent Application Laid-Open No. 2008-104929, which is a prior application of the present applicant, is used. The nozzle 5 includes a cylindrical main body 62 and a nozzle tip 63 fixed to the inner surface of the injection side wall 62 b of the main body 62. In the main body 62, one end of a cylindrical peripheral wall 62a is closed by an injection side wall 62b, and an injection hole 62c is provided at the center thereof, while the other end of the peripheral wall 62a is an opening 62d, and the opening 62d communicates with a supply pipe. It flows into the hollow portion 62e.

  The nozzle tip 63 has a substantially disk shape, is molded when the main body 62 is molded, and is fixed to the inner surface of the ejection side wall 62 b of the main body 62. The nozzle tip 63 is provided with an injection hole 63a communicating with the injection port 62c at the center of the injection side wall 62b of the main body 62, and sprays nutrient solution and water as a swirling flow from the injection hole 63a through the injection port 62c. The injection hole 63a includes a tapered hole portion 63a-1 that is reduced in diameter from the inflow side and a small diameter hole portion 63a-2 that is continuous with the tapered hole portion 63a-1 and communicates with the injection port 62c. The inner surface of the nozzle tip 63 is provided with turning grooves 63b that are curved in an arc shape with an interval of 90 degrees, and the inner peripheral ends of these turning grooves 63b are communicated with the peripheral edge of the tapered hole 63a-1, thereby turning the turning grooves 63b. The liquid is made to flow while swirling through.

  In the nozzle 5, the water flowing into the main body 62 from the ring header 6 passes through the swivel groove 63 b of the nozzle tip 63 on the jet side and flows into the tapered hole 63 a-1 of the jet hole 63 a as a swirl flow. . In the tapered hole portion 63a-1, the water droplets are made finer because they collide with the inner peripheral surface of the hole portion while turning, and the water droplets are made smaller than the tapered hole portion 63a-1 on the injection side. Then, the water droplets of 10 to 30 μm are ejected as semi-dry fog from the nozzle 62 c of the main body 62 that is in communication.

  Sensors 8 for detecting temperature and humidity are distributed and arranged at a lower position, a middle position, and a higher position in the height direction at the periphery and the center of the greenhouse 2. When the average temperature detected by the sensor 8 reaches a predetermined threshold, for example, 30 ° C., a control device (not shown) that automatically starts operation of the spray from the nozzle 5, the intake blower 3, and the exhaust blower 4. ). Further, the control device is set to stop the operation when the average temperature detected by the sensor 8 is less than 30 ° C., or to stop the operation when the humidity becomes a predetermined threshold, for example, 80% or more.

As said structure, when the inside of the greenhouse 2 reaches 30 degreeC, the spray from the nozzle 5, and the air blower 3 for intake, and the air blower 4 for exhaust_gas | exhaustion will be started automatically.
Thereby, the fine mist injected from the nozzle 5 gets around the outside air discharged from the intake blower 3, and the spraying distance becomes longer and the wind speed becomes faster. The fine mist sprayed at the lower part of the greenhouse 2 is sucked to the ceiling side by an exhaust fan 4 installed on the ceiling of the greenhouse 2, and rises from the lower part of the greenhouse 2 to the ceiling 2s through the entire interior of the greenhouse. Is exhausted.

  Thus, the fine mist sprayed sideways toward the central part of the greenhouse 2 from the four corner nozzles 5 at the lower part of the greenhouse 2 is assisted by the outside air discharged from the air blower 3, To fill the whole area. Further, when the swing switch 3 s provided in the intake blower 3 is turned on, the nozzle 5 automatically swings in the left-right direction, and the entire area below the greenhouse 2 can be filled with fine mist rapidly.

  Due to the vaporization heat of the fine mist that fills the lower part of the greenhouse 2, the temperature of the lower part is lowered, and the warm air in the greenhouse 2 rises to the outside by an exhaust fan 4 installed in the central part of the ceiling 2s of the greenhouse 2. Discharged. In addition, the fine mist filled in the lower part is also sucked upward by the exhaust fan 4. Thereby, the fine mist sprayed from the nozzle 5 rises rapidly toward the upper part without staying in the lower part of the greenhouse 2.

In this way, the fine mist quickly flows throughout the greenhouse 2, and in the course of the flow, the water droplets evaporate by taking the heat of vaporization, and the internal temperature of the greenhouse 2 can be rapidly reduced.
The spray from the nozzle 5 is sprayed toward the root of the cultivated plant P. If there are water droplets that are not evaporated and are attached to the cultivated plant P, they are absorbed by the ground under the cultivation bed.
The fine mist that fills the lower part of the greenhouse 2 corresponding to the lower part of the cultivated plant P is sucked and raised by the exhaust fan 4 provided in the center of the ceiling. At that time, the warm air remaining in the greenhouse 2 rises first and is discharged to the outside by the exhaust fan 4, and the inside of the greenhouse 2 is quickly cooled.
When the inside of the greenhouse falls below the set threshold of 30 ° C. or the humidity reaches 80%, spraying, intake and exhaust are stopped.
Thus, it can be automatically cooled according to the temperature rise in the greenhouse 2, and automatically stops when the temperature falls to the set temperature, prevents overheating in the greenhouse 2, and is maintained at a temperature condition suitable for plant growth. be able to.

5A and 5B show a second embodiment.
In the second embodiment, the air blower 3 (3A to 3D) to which the nozzle 5 is attached is attached to each of the nozzles 5 at intervals along the left and right peripheral walls 2a and 2c instead of the four corners of the greenhouse 2. Intake fans 3A and 3C, 3B and 3D are installed and arranged opposite to each other on both sides of the passage 7 between the cultivation beds 9.
In addition, two exhaust fans 4 (4A, 4B) are installed on the left and right sides of the ceiling 2s. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.
Since the function and effect are the same as those of the first embodiment, the description thereof is omitted.

6A and 6B show a third embodiment.
In 3rd Embodiment, the air blower 3 (3A-3D) to which the nozzle 5 was attached is arrange | positioned at intervals along the surrounding walls 2a and 2c which oppose right and left instead of four corners of the greenhouse 2, and left and right A staggered arrangement is provided on one side of each of the four passages 7 (7A to 7D).
Inlet air blowers 3A, 3C, 3B and 3D with nozzles are staggered on both sides of the passage 7 between the cultivation beds 9.
The plant P to be cultivated is a plant having relatively high height, such as tomato and cucumber. Therefore, the air intake blower 3 (3A to 3D) with a nozzle is a swing type in the vertical direction.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.
Since the function and effect are the same as those of the first embodiment, the description thereof is omitted.

7 and 8 show a fourth embodiment.
In the fourth embodiment, similar to the third embodiment, the plant to be cultivated is a plant having relatively high height such as tomato and cucumber. In the third embodiment, the air blower 3 (3A to 3D) with a nozzle is installed at the lower part, and is swung in the vertical direction, and is jetted upward, but in the fourth embodiment, with a nozzle The intake blower 3 (3A, 3B, 3C...) Is installed at a mid-high position of about 2 m above the ground, and spray is sprayed so as to flow downwardly.

  And the air blower for nozzles 3A with the nozzle is arranged at one end side in the length direction of the passage 7 between the cultivation beds 9, and the air blower for nozzles 3B with a nozzle is arranged at the center position in the length direction. Furthermore, the exhaust fan 4 is installed in the lower part of the outer wall on the other end side in the length direction. In addition, an exhaust fan 4 is also installed on the ceiling of the greenhouse 2.

As described above, when the air blower for suction 3 with a nozzle is installed not in the lower part in the greenhouse 2 but in the middle and high part more than the height at the time of growth of the cultivated plant and the spray is generated by tilting downward, It can be cooled efficiently. When installing an air blower for intake in the passage 7 or the like in the greenhouse 2, if it is arranged not in the lower part but in the middle and high parts, the work is not disturbed.
In addition, when the greenhouse 2 is large and the length direction is large, you may install the air blower 3 with an air intake 3 with a nozzle 3 or more at intervals in the length direction.

FIG. 9 shows a fifth embodiment.
In the fifth embodiment, the intake duct 30 is connected to the back surface of the fan 3d of the intake blower 3 with the nozzle on the intake side, and the intake duct 30 is fitted in the duct hole 32 formed in the outer wall of the greenhouse 2.
With this configuration, the outside air can be directly sucked by the fan 3d through the intake duct 30 and discharged into the greenhouse 2 to be blown.
Other configurations and operational effects are the same as those of the first embodiment, and thus the description thereof is omitted.

10A and 10B show a sixth embodiment.
The sixth embodiment shows a case where the present invention is applied to a large greenhouse 2 having a rectangular cross section, and a large number of intake blowers 3 with nozzles are arranged along the outer wall. In (A), staggered arrangement is performed along the outer walls on both sides on the narrow side. In (B), the air blower 3 with a nozzle is arranged in parallel in the width direction and the length direction.
As described above, in the large-scale greenhouse 2, a large number of nozzle-equipped intake blowers 3 are installed so that the spray from the nozzles is distributed over the entire greenhouse 2.

DESCRIPTION OF SYMBOLS 1 Plant cultivation house 2 Greenhouse 2a-2d Perimeter wall 2s Ceiling 3 (3A-3D) Intake fan 4 Exhaust fan 5 Nozzle 6 Ring header 7 Passage 8 Sensor 9 Cultivation bed
P plant

Claims (9)

Install an air blower with a nozzle in at least one of the lower and middle-high areas in the greenhouse, and the discharge side located in the greenhouse of the air intake fan should be placed sideways and placed in the middle-high area when installed in the lower part If so, it is obliquely downward, a nozzle is attached to the discharge side, and sprayed into the greenhouse from the nozzle and placed on the air blown from the intake blower,
An exhaust fan for exhausting the air in the greenhouse to the outside is installed at the top of the greenhouse,
The relative positional relationship between the nozzle-equipped intake blower installed in the greenhouse and the exhaust blower installed in the upper portion is installed such that the spray from the nozzle circulates in the greenhouse. Air conditioner for plant cultivation room.   The intake blower with a nozzle is provided with a duct on the intake side of the blower, and the duct extends to an opening provided in a greenhouse wall so that the outside air is directly sucked through the duct or provided on the outer wall of the greenhouse. The air conditioner for a plant cultivation room according to claim 1, wherein the air conditioner is installed in the vicinity of a window and sucks outside air introduced from the window.   The exhaust fan is installed on a ceiling of a greenhouse, and the fine mist that fills the greenhouse with the intake fan with the nozzle is set to be drawn into the ceiling with the exhaust fan. Air conditioner for plant cultivation room.   The nozzle-equipped intake blower is installed on the outer peripheral wall, four corners or / and doors of the greenhouse, and the spraying direction of the nozzle attached to the discharge side of the intake blower located indoors is spread throughout the greenhouse. The cooling device for a plant cultivation room according to any one of claims 1 to 3, wherein the cooling device is set as described above.   The air conditioner for a plant cultivation room according to any one of claims 1 to 3, wherein the air blower for intake with a nozzle is installed in a staggered arrangement on both sides on the inner peripheral wall surfaces on opposite sides of a greenhouse. In the case of a cultivated plant having a high height at the time of growth, the blower for suction with a nozzle is installed at a height position of the middle and high portions, and is located in a space between rows of cultivation beds and an outer wall on one side of the greenhouse and the center of the greenhouse Installed diagonally downward in the same direction as the
The air conditioner for a plant cultivation room according to any one of claims 1 to 3, wherein an exhaust fan for sucking spray from the intake fan with nozzle is installed at a lower portion of the opposing outer wall.   The said nozzle is arrange | positioned in the ring header provided in the outer periphery of the fan of the air blower for air intakes in the required space | interval, and is made into the type which can be swung in the up-down direction or the left-right direction. Air conditioner in plant cultivation room.   The said nozzle attached to the said air blower is a cooling apparatus of the plant cultivation room of any one of Claim 1 thru | or 7 used as the nozzle sprayed as a semi-dry fog containing the water droplet whose average particle diameter is 30 micrometers or less.   The outside air is introduced into the greenhouse by an air intake blower, the air in the greenhouse is exhausted to the outside by an exhaust air blower, and the spray from the nozzles installed in the greenhouse is put on the air blown from the air intake blower and placed in the greenhouse. A cooling method for a plant cultivation room that circulates inside and leads to the exhaust fan side.

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