JP6657777B2 - Cultivation facility - Google Patents

Description

  The present invention relates to a solution sterilizer, and includes, for example, a solution sterilizer for sterilizing raw water, culture solution, and the like used in hydroponic cultivation and solution cultivation in a plant cultivation facility.

  As a culture solution sterilizer, in Patent Document 1 below, a reactor is installed in a path for supplying a culture solution for plant cultivation to roots of a plant, and a titanium oxide-based photocatalyst is accommodated in the reactor, When the culture solution passes through this reactor, it is brought into contact with the titanium oxide-based photocatalyst, and the culture solution and the titanium oxide-based photocatalyst are irradiated with a light beam containing ultraviolet light, so that a photocatalytic reaction is developed in the culture solution and the culture is performed. A culture solution sterilizer for sterilizing a liquid is described.

JP-A-9-327246

  However, in Patent Document 1, there is a problem in that light containing ultraviolet rays is constantly irradiated to the culture solution and the titanium oxide-based photocatalyst, so that operation in consideration of energy saving cannot be performed.

  Therefore, in view of the problems of the above-described conventional apparatus, the present invention can operate a solution sterilizing apparatus that sterilizes a solution such as raw water or a culture solution using an ultraviolet light source efficiently and energy-saving. It is an object of the present invention to provide a solution sterilizer capable of reducing the cultivation cost of a cultivation facility.

  The object of the present invention is solved by the following technical means.

The first invention is
In a cultivation facility in which a plurality of rows of a plurality of cultivation beds (5) are arranged in a cultivation room (1) and a nutrient solution is supplied from a nutrient solution supply device (7) to each of the cultivation beds (5),
A solar radiation sensor (103) for detecting the amount of solar radiation is provided, and a thermal insulation curtain provided on the inner peripheral wall of the cultivation room (1) is used based on the amount of solar radiation detected by the solar radiation sensor (103). ,
The water in the agricultural water tank and the raw water in the rainwater tank merge via valves (135a, 136a), respectively, and are stored in the ultraviolet sterilization tank (139) by the pump 137. The sterilized raw water is stored in the post-sterilization tank (142). A titanium oxide (101) is provided in the ultraviolet sterilization tank (139), and light from an ultraviolet lamp (143) is irradiated on the titanium oxide (101) to sterilize raw water.
A flow sensor (138) is provided on the raw water supply side of the ultraviolet sterilization tank (139), and the drive of the ultraviolet light source (143) is controlled based on the supply amount detected by the flow sensor (138).
The drainage from the cultivation bed 5 is first collected in a pre-sterilization tank (97), supplied from the pre-sterilization tank (97) to a sterilization tank (99) via a pre-sterilization pump (98), and The waste liquid sterilized in (99) is discharged by the pump (100) after sterilization and is reused as a nutrient solution.
The drainage sterilization tank (99) for storing the drainage is placed outdoors where sunlight is irradiated, and a titanium oxide (101) is provided in the drainage sterilization tank (99);
When the integrated amount of solar radiation detected by the solar radiation sensor (103) reaches a predetermined value, the controller determines that sterilization has been completed and activates the pre-sterilization pump (98) and the post-sterilization pump (100). driven, the discharging drainage from the sterilizing tank (99), and feature that a new drainage is provided a control device for supplying said to sterilizing tank (99) from said sterilizing before tank (97) It is a cultivation facility.
The second invention provides
The thermal insulation curtain opens and closes at the difference between the outside temperature and room temperature,
The thermal insulation curtain is used when the amount of solar radiation and the outside air temperature is equal to or less than a set value, and is changed stepwise according to a difference between the outside air temperature and the room temperature.
The cultivation facility according to the first aspect of the present invention is characterized in that the outside air temperature is calculated to be lower as the wind speed increases.
A first invention related to the present invention is :
In a solution sterilizer for irradiating the ultraviolet sterilization tank 139 with light from an external or internal ultraviolet light source 143 to sterilize a solution such as raw water or a culture solution with the titanium oxide 101, a flow sensor 138 is provided on the solution supply side of the ultraviolet sterilization tank 139. A solution sterilization apparatus characterized in that the drive of the ultraviolet light source 143 is controlled based on the solution supply amount detected by the flow rate sensor 138.

A second invention related to the present invention is:
A solution supply device 137 is provided on the supply side of the ultraviolet sterilization tank 139, and a liquid amount sensor 146 for detecting the storage amount is provided in a post-sterilization tank 142 for storing the solution sterilized in the ultraviolet sterilization tank 139. The solution sterilizing apparatus according to the first aspect of the present invention is characterized in that the supply amount of the solution supply device 137 is controlled based on the stored amount.

Further, a third invention related to the present invention is:
The first or related to the present invention which is characterized in that by changing control lighting time of each ultraviolet light source 143 to provide a plurality of ultraviolet light sources 143 to equalize the lighting time of each ultraviolet light source 143 to the UV sterilizer tank 139 It is a solution sterilization apparatus of the second invention .

In the first embodiment of the present invention, by controlling the driving of the ultraviolet light source 143 for irradiating ultraviolet rays in the ultraviolet sterilization tank 139 with the solution supply amount detected by the flow rate sensor 138, when the raw water supplied into the ultraviolet sterilization tank 139 is small. Driving can be stopped or weakened to save energy.
In addition, a drainage sterilization tank (99) containing the drainage from the cultivation bed (5) is placed outdoors where sunlight is irradiated, and titanium oxide (101) is contained in the drainage sterilization tank (99). Is established,
When the integrated amount of solar radiation detected by the solar radiation sensor (103) reaches a predetermined value, the controller determines that sterilization has been completed, drives the pump, and drains water from the sterilization tank for drainage (99). And a controller that supplies new drainage to the sterilization tank for drainage (99), reducing costs and improving maintainability compared to the heat sterilizer and ultraviolet sterilizer. I do.
Further, according to the second aspect of the present invention, in addition to the effect of the first aspect, it is possible to prevent dew condensation from lowering the room temperature to rising.
In the first invention related to the present invention, by controlling the drive of the ultraviolet light source 143 for irradiating ultraviolet rays in the ultraviolet sterilization tank 139 with the solution supply amount detected by the flow rate sensor 138, the ultraviolet light is supplied into the ultraviolet sterilization tank 139. When the amount of solution is small, the drive can be stopped or weakened, and energy can be saved.

In the second invention related to the present invention, in addition to the effects of the first invention related to the present invention, a liquid amount sensor detects that a sufficient solution amount is present in the post-sterilization tank 142 for storing the sterilized solution. When the detection is performed at 146, the amount of the solution to be supplied to the ultraviolet sterilization tank 139 is reduced, and the driving of the solution supply device 137 and the ultraviolet light source 143 can be stopped or weakened, so that energy can be saved.

In the third invention related to the present invention, in addition to the effects of the first or second invention related to the present invention, the driving time of the ultraviolet light source 143 is averaged, so that the usable time can be reduced. It becomes longer and the replacement frequency can be reduced.

Outline plan view of plant cultivation facility Nutrient solution transfer path diagram of nutrient solution supply device Schematic side view showing the ventilation tube Heating equipment piping diagram Front view showing the operation of the moving belt Plan view showing a moving belt Side view showing peripheral configuration of stem temperature control pipe Front view showing peripheral configuration of stem temperature control pipe Schematic plan view showing the display state of the fruit number display system Explanatory drawing showing the operation of the nutrient solution sterilization system Explanatory diagram showing the sterilization system for raw water Explanatory drawing showing another raw water sterilization system Side view of cultivation facility Top view of cultivation facility Side view showing skylight opening / closing mechanism Perspective view showing an example of skylight control according to the wind direction Schematic plan view of cultivation room showing area in skylight control Flow chart showing wind direction correspondence control in skylight control Top view of cultivation room showing examples of opening and closing skylights according to wind direction Side view of an enlarged work vehicle wheel Side view of working mobile vehicle Enlarged side view of heating tube support Plan view showing the movement trajectory of the automatic positioning robot Working state side view of automatic excavator

  One embodiment of the present invention will be described below.

  FIG. 1 is a plan view of a cultivation facility. The cultivation facility includes a cultivation room 1 which is a greenhouse in which the indoor environment such as temperature and humidity is controlled by a heater or a humidifier, and a shipping room adjacent to the cultivation room 1. A room 2 is provided. In the center of the cultivation room 1, there is provided a main passage 4 through which a worker or a work moving vehicle (working vehicle) 3 or a control work vehicle can pass, and the main passage 4 is made of concrete whose road surface is made of concrete. It is a passage.

  A cultivation space 6 for cultivating a crop having a large number of rows of cultivation beds 5 serving as cultivation strips is formed at lateral positions on both sides of the main passage 4. The cultivation bed 5 is made of rock wool, and has a configuration in which a nutrient solution is supplied to each cultivation bed 5 from the nutrient solution supply device 7 in the shipping room 2. Further, at both ends of the main passage 4, an entrance 8 to the cultivation room 1 provided with an opening / closing door is provided, and it is configured to be able to go to the adjacent shipping room 2 through one entrance 8.

  In addition, the other entrance 8 is configured to be able to enter and exit from outside the cultivation facility. Then, the work vehicle is moved from the main passage 4 to the sub-passage 9 between the cultivation strips (each cultivation bed 5), and the work transfer vehicle 3 is moved along the cultivation strip (the cultivation bed 5) in the sub-passage 9. It is possible to perform various operations on the cultivation strips while performing.

  The work vehicle 3 travels on left and right heating pipes 37 laid on the sub-passage 9 as running rails. Further, since the work vehicle 3 has a battery of 12V for low-speed traveling and a battery of 24V for high-speed traveling, each battery checker is provided to determine a battery that needs to be charged.

  Also, as shown in FIG. 21, the work vehicle 3 runs across the parallel heating pipes 37 with the flanged wheels 13, so that the recess 13a is formed inside the flanged wheels 13 as shown in FIG. And a contact sensor 14 is provided in the recess 13a, and when the flanged wheel 13 is shifted left and right, the contact sensor 14 comes into contact with the heating pipe 37 and sounds the buzzer of the on-vehicle controller 15. The worker is informed of the possibility that the 3 will fall off the heating pipe 37 and fall, and stop traveling. Even if the operator attempts to start running by stepping on the foot switch 16 again, the driver will not run unless the run switch provided on the on-vehicle controller 15 is depressed, thereby ensuring safety.

  FIG. 22 shows a configuration for supporting the heating pipe 37. A pair of supporting legs 21 and 21 are erected at a predetermined pitch on the ground plate 22 to hold the supporting plate 20 horizontally, and the heating pipe 37 is mounted on the supporting plate 20. The height adjusting bolt 18 provided with the receiving pipe receiver 17 is screwed in, the support plate 20 is sandwiched between the lock nuts 19, 19 and tightened and fixed to support the heating pipe 37 horizontally. With this configuration, the tip of the height adjustment bolt 18 can be seen from between the supporting legs 21 and 21 and can be assembled so as not to come off except for a height adjustment allowance. When the tip of the height adjusting bolt 18 is visible, there is no possibility of the height adjusting bolt 18 coming off.

  The shipping room 2 includes the above-described nutrient solution supply device 7 and a sorting device 10 for sorting harvested products (fruits) such as tomatoes by weight, size, or grade.

  The sorting device 10 includes a sorting conveyor 11 that conveys and sorts crops, and a harvest storage unit 12 that is provided on both sides of the sorting conveyor 11 and that stores crops for each class. The harvested products are supplied from the conveyor 11 to the respective harvested product accommodating sections 12 and sorted into each class. The sorting conveyor 11 is configured to be bent in an L shape in plan view. Further, a storage box for storing the harvested product may be provided in each harvested storage unit 12, and the harvested product may be shipped for each storage box.

  As shown in FIG. 5, on the upper side of the cultivation strip (cultivation bed 5), two attracting wires 80 along the cultivation strip are provided on each cultivation strip on the left and right. The cultivated plants (cultivation strains) arranged in a line in the cultivation strip are alternately distributed and attracted by the left and right attraction wires 80, and are attracted by the attraction string 81 hanging down from the attraction wire 80. Therefore, for example, when cultivating a tomato, the stem of the tomato extends from the cultivation bed 5 along the attracting string 81.

  As shown in FIGS. 7 and 8, a growth point temperature control pipe 91 is provided below the attraction wire 80 and above the cultivation bed 5. Therefore, the growth point temperature control pipe 91 is arranged near the attraction string 81. A rhizosphere temperature control pipe 92 is provided immediately above the cultivation bed 5 which is lower than the growth point temperature control pipe 91. The growth point temperature control pipe 91 and the rhizosphere temperature control pipe 92 extend in the direction of the attracting wire 80, that is, the cultivation strip, and have a configuration in which hot or cold water as a temperature control fluid flows. The rhizosphere temperature control pipe 92 is provided for each cultivation line. The growth point temperature control pipes 91 are provided corresponding to the attraction wires 80, and a pair is provided for each cultivation line.

  Therefore, the cultivation bed 5 is heated or cooled by flowing a temperature control fluid through the rhizosphere temperature control pipe 92, and the temperature of the rhizosphere of the cultivated plant (for example, tomato) is adjusted. Further, by flowing a temperature control fluid through the growth point temperature control pipe 91, the vicinity of the growth point of the cultivated plant (for example, tomato) attracted by the attraction string 81 is heated or cooled, and the temperature near the growth point of the cultivated plant is heated. Make adjustments. Although the height of the growing point changes with the growth of the cultivated plant, a height adjusting device for adjusting the height of the growing point temperature control pipe 91 is provided separately.

  A stem temperature control pipe 93 is provided between the growth point temperature control pipe 91 and the rhizosphere temperature control pipe 92. The stem temperature control pipe 93 is flexible and is provided along the stem in the vicinity of the attracting cord 81, that is, the cultivated plant, and is provided for each attracting cord 81, that is, the cultivated plant. The hot or cold water flows from the growth point temperature control pipe 91 to the rhizosphere temperature control pipe 92 via the stem temperature control pipe 93.

  Therefore, the vicinity of the stem of the cultivated plant is heated or cooled by the stem temperature adjusting pipe 93 to control the temperature in the vicinity of the cultivated plant. Therefore, the growth point temperature control pipe 91, the rhizosphere temperature control pipe 92, and the stem temperature control pipe 93 can locally heat or cool the vicinity of the cultivated plant, improve the temperature control efficiency, and improve the cultivation. The running cost can be reduced by controlling the temperature as compared with heating or cooling the entire room 1.

  As a heat source, an electric heating device (chiller) that discharges and supplies a heat medium such as hot water or cold water is used. Therefore, hot water or cold water is supplied from the heating device to the growth point temperature control pipe 91, and the hot water or cold water passes through the stem temperature control pipe 93 and forms a circulation path returning from the rhizosphere temperature control pipe 92 to the heating device. . Note that, instead of the heating device, a configuration may be adopted in which a heat medium from a first heating device 31 or a second heating device 32 described later is supplied.

  In order for each cultivated plant (cultivated strain) to receive light efficiently, it is ideal that the interval between each cultivated plant (cultivated strain) is substantially equal over the entire cultivation room 1. The cultivated plant is located above the sub-passage 9. However, when performing various operations on the cultivation strip while moving the work mobile vehicle 3 in the sub-passage 9, if the cultivated plants are protruding above the sub-passage 9, they hinder the movement of the work mobile vehicle 3, and the work is performed. It may be difficult. Therefore, as shown in FIG. 5, the cultivated plants distributed to the respective cultivation strips on the left and right sides of the cultivation bed 5 are positioned lower than the attraction wire 80 and higher than the cultivation bed 5 and at the same height as the work mobile vehicle 3. There is provided a moving band 82 for moving to the side.

  As shown in FIG. 6, the moving strip 82 extends along the cultivation strip on the side of the cultivated plant and on the sub-passage 9 side with respect to the cultivated plant, and one end is fixed to the end of the cultivated strip. The other end is configured to be wound or unwound by a band winding device 84 driven by a band winding motor 83. By winding or unwinding by the band winding motor 83, the band along the cultivation strip is formed. Can change body length. Thereby, at the time of normal cultivation, by extending the band along the cultivation strip by feeding out the band by the band winding device 84, the cultivated plant is not much regulated by the moving band 82 and is placed on the sub passage 9. It will be a protruding position.

  At the time of work by the work vehicle 3, when the approach detection sensor 85 provided on the movement band 82 detects that the work vehicle 3 has entered the sub-passage 9, the band is taken up by the band winding device 84. By shortening the strip along the cultivation strip, the cultivated plants are brought to the cultivation bed 5 side by the transfer strip 82 to secure a moving space for the work mobile vehicle 3.

  Thereby, in conjunction with the work vehicle 3 entering the sub-passage 9, the movement belt 82 automatically operates, and in order to prevent cultivated plants from obstructing the movement of the work vehicle 3, It is possible to suppress the trouble of the operator in securing the moving space of the work mobile vehicle 3, and the workability is improved. The moving belt 82 has a wire serving as a detector of the entry detection sensor 85 inside. The entry detection sensor 85 can similarly detect when the control vehicle has entered the sub-passage 9, and the moving strip 82 enters not only the work vehicle 3 but also the control vehicle into the sub-passage 9. It works in conjunction with.

  On the sub-passage 9, the work mobile vehicle 3 is configured to move as needed by a worker according to the progress of the work, while the control vehicle is configured to automatically control while traveling automatically. . The pest control vehicle travels back and forth in the sub-passage 9, but according to the required amount of pest control for the cultivated strip to be controlled, a one-way control state in which the pest control work is performed only during one-way travel in the reciprocating travel, and a pest control in the reciprocating travel. The configuration is such that it can be switched between a reciprocating control state in which work is performed and a two-reciprocal control state in which the same sub-passage 9 is reciprocated twice and the control work is performed in the two reciprocating runs. Thus, it is possible to prevent an adverse effect on cultivated plants due to unnecessary control, and to improve the control effect in cultivation strips having a high degree of occurrence of pests.

  As shown in FIG. 9, the work vehicle 3 or the control work vehicle is provided with a camera 94 for photographing cultivated plants from the sub passage 9. The camera 94 automatically detects fruits that have matured in each cultivated strain while running the work mobile vehicle 3 or the control work vehicle. Image data captured by the camera 94 is wirelessly transmitted to the control unit (controller) 26, and a mature fruit is detected by a fruit determination device in the control unit (controller) 26. For example, when the fruit is a tomato, the fruit becomes red as it matures. Therefore, the fruit discriminating device processes the image photographed by the camera 94 and discriminates the color to detect the mature fruit. Note that, in addition to color discrimination, mature fruit may be discriminated based on shape, size, and the like.

  In addition, the position information of the work mobile vehicle 3 or the control work vehicle is wirelessly transmitted to the control unit (controller) 26 together with the image data to recognize which cultivated strain in the cultivation room 1 is the image. . The position information can be obtained by a GPS transmitter provided in the work vehicle 3 or the control work vehicle. Thereby, the number of mature fruits for each cultivated strain is counted.

  Then, the control unit 26 calculates the total number of mature fruits for each cultivation line and the total number of mature fruits in the cultivation room 1 from the number of mature fruits for each cultivation strain, and calculates the mature fruit from the total number of these mature fruits. Set the workers to harvest.

  The setting of the workers will be described in detail. The work capabilities (work speed, work efficiency: for example, the number of harvested mature fruits per unit time, etc.) of a plurality of workers are input to the control unit 26 in advance. From the total number of mature fruits in the entire cultivation room 1, the number of temporary harvests of each worker is calculated according to the work ability. Then, based on the calculated number of temporary harvests, the workers are allocated in order from the cultivation strip at the end of the cultivation room 1, and the work area of each worker is set. At this time, the workers are set for each cultivation line so that the work areas of a plurality of workers do not span the same cultivation line.

  At the upper position of each cultivated plant, there is provided a number indicator 95 which is a lightning display board, and the number of mature fruits in the corresponding cultivated plant is indicated by the number by wireless transmission from the control unit 26 to the number indicator 95. Is displayed on the container 95. In addition, a monitor 96 is provided at the entrance of each cultivation strip (the end on the side of the main passage 4), and the total number of mature fruits in the cultivation strip and the harvesting work are transmitted by wireless transmission from the control unit 26 to the monitor 96. The name of the operator performing the operation is displayed on the monitor 96. The worker performs the harvesting operation on the cultivation strip corresponding to the monitor 96 on which his or her name is displayed.

  The worker performs the harvesting operation on the sub-passage 9 while recognizing the total number of mature fruits in the cultivated strips displayed on the monitor 96 and the number of mature fruits for each cultivated strain displayed on the number indicator 95. Do. This allows a plurality of workers to efficiently perform harvesting work in the entire cultivation room 1 irrespective of the work abilities of the workers, and also makes it easy to find mature fruits. Can be shortened. In addition, since a worker is set for each cultivation strip, a plurality of workers can be prevented from working on the same sub-passage 9 at the same time, and work efficiency is improved. When there are two cultivation strips between the sub-passages 9, it is desirable to set an operator for each pair of cultivation strips facing both sides of the sub-passage 9.

  Further, the camera 94 photographs the stoma behind the leaf of the plant, and the controller 26 determines the size of the stoma. On the other hand, a carbon dioxide supply device that supplies carbon dioxide into the cultivation room 1 is provided, and when the control unit 26 determines that the pores are large in the image captured by the camera, the concentration of the carbon dioxide in the cultivation room 1 is reduced. Regardless, carbon dioxide is discharged from the carbon dioxide supply device. Accordingly, when photosynthesis is active due to wide open pores, carbon dioxide can be supplied accurately, and wasteful supply of carbon dioxide can be reduced as compared with conventional carbon dioxide supply control based on carbon dioxide concentration.

  As shown in FIG. 2, the nutrient solution supply device 7 includes a first tank 41 and a second tank 42 for storing a nutrient solution, an acid tank 43 for storing nitric acid, and a raw water tank 44 for storing raw water. The liquid stored in the tanks 41, 42, 43, 44 is supplied to the mixing device 49 via the main opening / closing valves 45, 46, 47, 48, and is mixed by the mixing device 49.

  The first tank 41 and the second tank 42 store nutrient solutions having different fertilizer components from each other. In the supply path (supply pipes 50, 51, 52) from the first tank 41, the second tank 42, and the acid tank 43 to the mixing device 49, the supply side of each of the main opening / closing valves 45, 46, 47 is located on the upstream side. Filters 53, 54 and 55 before mixing are provided. Further, auxiliary opening / closing valves 56, 57, 58 are provided on the upstream side of the pre-mixing filters 53, 54, 55, respectively.

  In the supply path (supply pipe 52) from the acid tank 43, a branch pipe 62 (branch path) is connected to the lower supply side from the sub opening / closing valve 58 and the pre-mixing filter 55 and to the upper supply side from the main opening / closing valve 47. are doing. The branch pipe 62 (branch path) is mainly provided on the lower supply side than the sub opening / closing valves 56 and 57 and the pre-mixing filters 53 and 54 in the supply paths (supply pipes 50 and 51) from the first tank 41 and the second tank 42. It is connected to each position on the upstream side of the supply from the on-off valves 45 and 46, and is configured so that the nitric acid in the acid tank 43 can be supplied to the supply paths (supply pipes 50 and 51) from the first tank 41 and the second tank 42. ing.

  In the middle of the branch pipe 62, an electromagnetic branch valve 63 is provided. In the supply pipes 50 and 51 from the first tank 41 and the second tank 42, the flow rate in the supply pipes 50 and 51 is on the lower supply side from the connection of the branch pipe 62 and on the upper supply side from the main opening and closing valves 45 and 46. Are respectively provided.

  The nutrient solution mixed by the mixing device 49 is supplied to each cultivation bed 5 in the cultivation room 1 by the liquid supply pipe 61 via the nutrient solution pump 59 and the mixed filter 60.

  Further, a discharge pipe 66 for discharging the liquid without supplying the liquid to each cultivation bed 5 in the cultivation room 1, that is, the liquid supply pipe 61, is connected to the lower side of the supply than the nutrient solution pump 59 and the mixed filter 60. The liquid discharged from the nutrient solution pump 59 is supplied to the liquid supply pipe 61 by the electromagnetic discharge opening / closing valve 67 provided on the discharge pipe 66, and the liquid is discharged to the outside via the discharge pipe 66. It is configured to be able to switch to the discharge state.

  Therefore, in a normal state in which the nutrient solution is supplied to each cultivation bed 5 in the cultivation room 1, the branching on-off valve 63 and the discharge on-off valve 67 are closed, and the nutrient solution mixed by the mixing device 49 is supplied to the liquid supply pipe 61. Supply. During the supply of the nutrient solution, the flow rates in the supply pipes 50 and 51 from the first tank 41 and the second tank 42 are sequentially detected by the flow rate sensors 64 and 65, respectively. Then, when the flow rate in the supply pipes 50 and 51 during the supply of the nutrient solution becomes equal to or less than a predetermined value, when the supply of the nutrient solution to each of the cultivation beds 5 in the cultivation room 1 is stopped, the control device is used. The opening / closing valve 63 for branching and the opening / closing valve 67 for discharging are automatically opened, the nutrient solution pump 59 is driven, and the nitric acid in the acid tank 43 is supplied from the first tank 41 and the second tank 42 through the branch pipe 62. , 51 and the nitric acid having passed through the mixing device 49 is discharged through a discharge pipe 66 to the outside.

  At this time, in the supply pipes 50 and 51 from the first tank 41 and the second tank 42, the respective auxiliary opening / closing valves 56 and 57 are automatically closed, and nitric acid supplied to the supply pipes 50 and 51 is supplied to the supply pipe 50. , 51 are prevented from flowing back to the first tank 41 and the second tank 42.

  Therefore, the supply pipes 50 and 51 from the first tank 41 and the second tank 42 may be clogged with insoluble matter and impurities in the nutrient solution. Is detected, nitric acid as a cleaning liquid is automatically injected into the supply pipes 50 and 51, whereby the supply pipes 50 and 51 can be automatically washed. Maintenance work such as cleaning can be omitted and work efficiency can be improved.

  In addition, since the washing liquid (nitric acid) is discharged to the outside via the discharge pipe 66 and is not directly supplied to the cultivation bed 5, the above-mentioned washing does not inhibit the growth of the plant.

  Further, on the supply side of the filter 60 after mixing on the supply side of the nutrient solution pump 59, the nutrient solution discharged from the nutrient solution pump 59 is branched, and the mixing device 49 is provided on the supply side of the nutrient solution pump 59. A circulation path (circulation pipe 68) for returning to the supply lower side is connected. The circulation path (circulation pipe 68) is provided with an electromagnetic return opening / closing valve 69, and the pressure in the supply of nutrient solution to the liquid supply pipe 61 is detected by a pressure sensor 70 provided on the downstream side of the supply of the filter 60 after mixing. When a large fluctuation is detected, the control device automatically opens the return opening / closing valve 69 to flow and circulate the nutrient solution through the circulation path (circulation pipe 68), thereby stabilizing the pressure in the liquid supply pipe 61. It has a configuration.

  This prevents a water hammer phenomenon due to air swelling or the like when the nutrient solution pump 59 is activated, and also prevents damage to the piping (the solution supply pipe 61) on the lower supply side of the solution supply pump 59. The circulation path (circulation pipe 68) is provided with a temperature sensor 71 for detecting the temperature of the nutrient solution circulated. When the temperature sensor 71 detects that the temperature of the nutrient solution has risen to a predetermined value or more, The nutrient solution pump 59 is forcibly stopped by the control device so that the nutrient solution is not circulated through the circulation pipe 68 to promote the temperature drop of the nutrient solution. Thereby, it is possible to prevent a structure such as a valve or a packing in the pipe from being melted and damaged by the heat of the nutrient solution.

  Also, the drainage from the cultivation bed 5 is collected in the raw water tank 44 and reused for supplying the cultivation bed 5.

  As shown in FIG. 3, a ventilation pipe 27 that passes through a raw water tank 44 is provided in the cultivation room 1, and a fan 28 is driven to ventilate the ventilation pipe 27. Thereby, the air in the cultivation room 1 positively hits the low temperature raw water tank 44 and forms dew, and the air in the cultivation room 1 can be easily dehumidified, and the cultivation room 1 in the cultivation room 1 heated by the heating equipment described later. The temperature of the raw water and nutrient solution in the raw water tank 44 can be raised by air.

  Note that the condensed water is discharged out of the cultivation room 1 through a drain port 29 provided in the ventilation pipe 27. Therefore, the frequency of opening the skylight 30 or the degree of opening of the skylight 30 in the skylight control described below can be suppressed low, so that a decrease in the room temperature in the cultivation room 1 can be suppressed, and the heating load of the heating equipment can be suppressed to save energy. Can be achieved.

  In FIG. 2, the raw water tank 44 is provided with an EC sensor 86 for detecting the fertilizer concentration of the nutrient solution and a PH sensor 87 for detecting the pH value of the nutrient solution. Based on the values detected by the EC sensor 86 and the PH sensor 87, the main opening / closing valves are controlled by the main nutrient solution supply controller 88 of the control device so that the nutrient solution mixed by the mixing device 49 has the desired fertilizer concentration and pH value. 45, 46, 47 and 48 are controlled.

  However, if the main nutrient solution supply controller 88 breaks down, the main opening / closing valves 45, 46, 47, and 48 cannot be operated, and the nutrient solution cannot be supplied to each cultivation bed 5, which adversely affects cultivation. Become. Therefore, the control device is provided with a preliminary control panel 89, and when the main nutrient solution supply controller 88 is out of order, the main control valves 45, 46, 47, and 48 can be controlled by the preliminary control panel 89. When switching to the control of the preliminary control panel 89, the main opening / closing valves 45, 46, 47, and 48 are opened only for a preset time to create a nutrient solution, and the nutrient solution can be easily supplied to each cultivation bed 5. .

  As a result, although the control accuracy of the fertilizer concentration and the pH value of the nutrient solution to be supplied is reduced, it is possible to temporarily prevent the nutrient solution from being unable to be supplied to the cultivation bed 5 and to avoid a large damage such as plant withering. Can be.

  The main nutrient solution supply controller 88 is repaired while the nutrient solution supply control is performed by the preliminary control panel 89, and if the main nutrient solution supply controller 88 returns to normal, the nutrient solution by the main nutrient solution supply controller 88 is returned. What is necessary is just to switch to supply control. In the nutrient solution supply control by the preliminary control panel 89, a plurality of preset opening time patterns of the main opening / closing valves 45, 46, 47, 48 are provided, and the patterns are set according to the detection values of the EC sensor and the PH sensor. May be switched.

  Further, a component analyzer for analyzing fertilizer components (eg, nitrogen component, potash component, calcium component, phosphoric acid component, etc.) of the effluent from the cultivation bed 5 is provided, and the control device controls the effluent measured by the component analyzer. By comparing the fertilizer component and the set fertilizer component set in advance for cultivation, a large amount of the insufficient fertilizer component is supplied by drainage from the first tank 41 and the second tank 42, which are the nutrient solution tanks, and the excess fertilizer is discharged. The opening time or opening degree of the main opening / closing valves 45 and 46 is controlled so that the components are supplied in a small amount, and a new nutrient solution is prepared by mixing the drainage with the nutrient solution from the nutrient solution tank.

  Thus, a nutrient solution stabilized with a desired fertilizer component with high accuracy can be supplied to the cultivation bed 5 irrespective of the use of the drainage solution. It should be noted that the fertilizer component that is insufficient in the drainage is absorbed by the plant, so it is determined that the plant requires a large amount. The excess fertilizer component in the drainage is required by the plant because the plant absorbs a small amount. It may be determined that the degree is low, and the set fertilizer component may be corrected according to the requirements of the plant. As a result, the supply of nutrient solution can be controlled with high accuracy in accordance with the cultivation situation, and the waste of fertilizer can be prevented, and the environmental load caused by finally discarding the wastewater having a high fertilizer concentration can be reduced.

  FIG. 10 shows a waste liquid treatment apparatus. The drainage from the cultivation bed 5 is first collected in a pre-sterilization tank 97, supplied from the pre-sterilization tank 97 to a sterilization tank 99 via a pre-sterilization pump 98, and sterilized in the sterilization tank 99. The discharged wastewater is supplied to the raw water tank 44 via the pump 100 after sterilization. The sterilizing tank 99 is placed outdoors where sunlight irradiates. Titanium oxide 101 as a photocatalyst is mixed in the sterilizing tank 99, and the titanium oxide 101 irradiated with sunlight is strongly oxidized on its surface. Generates power to decompose and sterilize organic matter (such as bacteria) in the wastewater. It is preferable to appropriately stir the inside of the sterilization tank 99 in order to obtain a good sterilizing effect.

  In addition, a filter 102 is provided at an outlet from the sterilization tank 99 to the post-sterilization pump 100 so that titanium oxide is not discharged from the sterilization tank 99 together with drainage. In addition, a solar radiation sensor 103 is provided near the sterilizing tank 99, and when the integrated value of the solar radiation detected by the solar radiation sensor 103 (integrated solar radiation) reaches a predetermined value, it is determined that the sterilization is completed by the control device. By judging, the pre-sterilization pump 98 and the post-sterilization pump 100 are driven to discharge the drainage from the sterilization tank 99 and to supply new drainage from the pre-sterilization tank 97 to the sterilization tank 99. Since a part of the organic matter (such as bacteria) in the waste liquid decomposed by the titanium oxide 101 becomes carbon dioxide, this carbon dioxide can be supplied into the cultivation room 1 and used for photosynthesis of plants. Sterilization with the titanium oxide 101 can reduce costs and improve maintainability as compared with a conventional heat sterilizer or ultraviolet sterilizer.

  FIG. 11 shows a raw water sterilizer for sterilizing raw water for a solution.

  Raw water from the agricultural water tank 135 and the rainwater tank 136 are combined via valves 135a and 136a, respectively, sent to the ultraviolet sterilization tank 139 by the pump 137, and the sterilized raw water is stored in the tank 142 after sterilization by the pipe 141.

  Titanium oxide 101 is provided in the ultraviolet sterilization tank 139, and sunlight and light of an ultraviolet lamp 143 are irradiated on the titanium oxide 101 to decompose and sterilize organic substances (such as bacteria) in raw water.

  The controller 140 monitors the raw water supply state to the ultraviolet sterilization tank 139 with a flow rate sensor 138 provided on the discharge side of the pump 137, stops the pump 137 when the supply amount runs out, and turns off the ultraviolet lamp 143 to save power. I can do it.

  FIG. 12 shows a raw water sterilizer according to another embodiment.

  Raw water is sent from the pre-sterilization tank 144 to the ultraviolet sterilization tank 139 by the pump 137. A plurality of ultraviolet lamps 143 are provided therein, and the storage amount of the sterilized raw water in the post-sterilization tank 142 measured by the water level meter 146 of the post-sterilization tank 142 is input to the controller 140, and the storage amount of the sterilized raw water is increased. For example, power can be saved by opening the valves 137 and 138 to increase the amount of raw water returned to the pre-sterilization tank 144 and reducing the number of ultraviolet lamps 143 to be turned on. Note that the amount of raw water sent to the ultraviolet sterilization tank 139 may be adjusted by controlling the rotation of the pump 137 without providing the return pipes 150 and 151.

  If the lighting time of each ultraviolet lamp 143 is stored and the lighting timing is controlled so that the lighting time of each ultraviolet lamp 143 is averaged, the life of each ultraviolet lamp 143 can be extended.

  Next, the heating equipment of the cultivation room 1 will be described with reference to FIG. 4. The first heating device 31 is an oil boiler that heats hot water using heat generated by burning oil such as heavy oil or kerosene as fossil fuel. And a second heating device 32 that is a wood pellet boiler that heats hot water by using heat generated by burning wood pellets or the like obtained by compressing lumber by-products such as plant residues and sawdust, which are fuels other than fossil fuels. A heating pipe 33 for supplying water to be heated to the first heating device 31 and the second heating device 32; and a first supply pipe 35 for supplying hot water heated by the heating tube 33 to the pump 34. A second supply pipe 36 for supplying hot water from the pump 34 to the heating pipe 37 in the greenhouse; and a return pipe 38 for returning cold water from the heating pipe 37 to the heating pipe 33, Heating pipe 33, first supply pipe 35, second supply pipe 36, heating Constitute a circulation path of the hot water through the pipe 37 and return pipe 38.

  The first heating device 31, the second heating device 32, and the heating pipe 33 are disposed in the management room 25 outside the cultivation room 1, and the first heating device 31 and the second heating device 32 are heated. The heating pipes 37 are arranged along the pipes 33 in series, and the heating pipes 37 are arranged along each sub-passage 9 in the cultivation room 1. In addition, a bypass pipe 72 connecting the first supply pipe 35 and the return pipe 38 is provided, and the bypass pipe 72, the first supply pipe 35, the second supply pipe 36, the heating pipe 37, and the return pipe 37 are provided without passing through the heating pipe 33. The hot water circulation path is formed via the pipe 38, and the connection portion between the bypass pipe 72 and the first supply pipe 35 has a ratio of a flow rate that joins from the heating pipe 33 side and a ratio of a flow rate that joins from the bypass pipe 72 side. Is provided with a switching valve (three-way valve) 73 capable of adjusting the flow rate. The second supply pipe 36 is provided with a hot water temperature sensor 75 for detecting the temperature of the hot water flowing through the second supply pipe 36.

  The cultivation room 1 is provided with a room temperature sensor 74 for detecting the room temperature in the cultivation room 1 and a humidity sensor 76 for detecting the humidity in the cultivation room 1. In addition, a hot air heater (heat pump) 104 for blowing out hot air is provided. This warm air heater (heat pump) 104 is operated by electric power.

  The roof of the cultivation room 1 has a configuration in which a large number of ridges 105 inclined in a triangular shape are continuously provided in parallel, and countless skylights 30 are arranged vertically and horizontally.

  As shown in FIG. 15, the skylight 30 is formed of a square (rectangular) transparent glass, and a plurality of edges (four sides) on the lower surface side of the skylight 30 are cut out from below. A bearing member 107 forming the bearing groove 106 is fixed. On the other hand, a rotation fulcrum shaft 108 that fits into the bearing groove 106 is provided on the cultivation room 1 side.

  Therefore, in one skylight 30, four rotation fulcrum shafts 108 are provided corresponding to the four sides of the skylight 30, and a pair of opposed rotation fulcrum shafts 108 are arranged in parallel in the same direction. Are provided so that the directions of the rotation fulcrum shafts 108 of the two sets intersect (orthogonally).

  At the lower part of the bearing member 107, a regulating device 109 for regulating the rotation fulcrum shaft 108 from coming out of the bearing groove 106 is provided. The regulating device 109 is configured such that a solenoid pin 109a serving as a regulating member protruding from an entrance of the bearing groove 106 is operated by a regulating electromagnetic solenoid 109b.

  Therefore, by protruding the solenoid pin 109a with the rotation fulcrum shaft 108 inserted into the bearing groove 106, the rotation fulcrum shaft 108 located above the solenoid pin 109a is prevented from falling out of the bearing groove 106. , Restricting the bearing member 107 from moving upward away from the pivot shaft 108.

  A push-up device 77 that pushes the skylight 30 from below is provided below the center of the skylight 30. The push-up device 77 is configured by an electric cylinder, and has a configuration in which the cylinder rod 110 of the electric cylinder projects upward, whereby the tip end of the cylinder rod 110 contacts the skylight 30 from below and pushes up.

  Accordingly, one of the plurality (four) of the rotation fulcrum shafts 108 is fixed, and the regulation device 109 corresponding to the other three rotation fulcrum shafts 108 is fixed. The skylight 30 is rotated upward about the fixed rotation fulcrum shaft 108 by releasing all of them and operating the lifting device 77.

  Therefore, among the plural (four) regulating devices 109 corresponding to the plural (four) rotating fulcrum shafts 108, the regulating device 109 to be regulated is selectively selected and the skylight 30 is moved in different directions (four directions). Can be opened and closed.

  As shown in FIG. 14, wind vanes 111 for detecting the wind direction and the wind at each position are provided at a plurality of positions (five places) on the roof of the cultivation room 1. On the roof of the cultivation room 1, a rainfall sensor 90 for detecting the presence or absence of rainfall and the intensity of rainfall and a solar radiation sensor 103 for detecting solar radiation are provided.

  The control unit (controller) 26 for controlling the environment of the cultivation room 1 is disposed in the management room 25 outside the cultivation room 1, and includes a room temperature sensor 74, a humidity sensor 76, an anemometer 111, a rainfall sensor 90, and a solar radiation sensor 103. And outputs an operation signal to each of the regulating devices 109 and the lifting device 77.

  For example, the target room temperature is calculated and set according to the time zone of the day, such as high during the day and low during the night, and the target humidity is set so that the higher the target temperature, the lower the target temperature corresponding to the set target temperature. Is calculated and set. The target temperature and the target humidity are not limited to the setting method based on the time period of the above-mentioned day, but may be changed based on the cultivation process of the crop, the season, or the like, or may be set to a certain set value by the operator. Or you may. When the detected temperature detected by the room temperature sensor 74 is higher than the target temperature or the detected humidity detected by the humidity sensor 76 is higher than the target humidity, the push-up device 77 is operated to open the skylight 30. Execute

  The details of the skylight control will be described. As shown in FIG. 17, a plurality of skylights 30 arranged vertically and horizontally on the roof of the cultivation room 1 are divided into a plurality of areas, and the vicinity of the anemometer corresponding to the plurality of anemometers 111 is shown. The wind direction estimation areas 113 where the wind direction meters 111 are not disposed in the vicinity between the wind direction measurement areas 112 and the wind direction meters 111 are set. The opening / closing direction of the skylight 30 is controlled for each of these areas.

  The plural (five) anemometers 111 are arranged at the four corners and the center of the roof, and the wind direction measurement areas 112 are provided at five points at the four corners and the center, and the wind direction estimation area 113 is located at the center. It is provided at four places laterally of the wind direction measurement area 112 and sandwiched between two wind direction measurement areas 112 among the four corners.

  In the wind direction measurement zone 112, based on the wind direction detected by each anemometer 111, only the windward regulating device 109 in each skylight 30 and the push-up device 77 are operated, and the leeward side of the skylight 30 is operated. open. In the wind direction estimation area 113, the wind direction and the vector based on the wind force in a plurality of (three) adjacent wind direction measurement areas 112 are calculated by the detection of the anemometer 111, and the wind direction is obtained by a synthesized vector obtained by synthesizing these vectors. On the basis of the above, only the regulation device 109 on the windward side of each skylight 30 is operated and the push-up device 77 is operated to open the leeward side of the skylight 30. That is, in the wind direction estimation area 113, if the wind directions in all adjacent (three) wind direction measurement areas 112 are in the same direction, the skylight 30 opens and closes in the same direction as the opening and closing direction of the skylight 30 in the adjacent wind direction measurement area 112. .

  Further, if the wind direction differs in the adjacent wind direction measurement area 112 due to the local wind flow, the wind direction is estimated by the above-described composite vector, and the opening and closing direction of the skylight 30 is appropriately controlled. The above-described vector represents the wind direction by the direction and the wind force by the length.

  Further, the push-up devices 77 in all the skylights 30 are designed so that the opening degree of the skylights 30 increases in proportion to the difference between the target temperature and the temperature detected by the room temperature sensor 74 or the difference between the target humidity and the humidity detected by the humidity sensor 76. (The opening / closing amount of the skylight 30) is controlled.

  When the wind power is large based on the measured or estimated wind power, the operation amount of the push-up device 77 (opening / closing amount of the skylight 30) may be corrected so that the opening amount of the skylight 30 is reduced. Further, when the wind direction is different from that of the adjacent area and the opening / closing direction of the skylight 30 is different, the operation amount of the push-up device 77 (the opening / closing amount of the skylight 30) may be corrected so that the opening amount of the skylight 30 is reduced. Good.

  Thereby, when there is a great risk of damage to the skylight 30 due to wind, for example, when the wind force is large or the local wind direction changes drastically, the opening amount of the skylight 30 is made as small as possible to prevent the skylight 30 from being damaged. be able to.

  In the above description, the configuration for controlling the opening / closing direction and the opening / closing amount of the skylight 30 for each area has been described. However, fuzzy control for setting and controlling the opening / closing direction or the opening / closing amount for each skylight 30 based on the wind direction and the wind force. May be used.

  More specifically, when the opening / closing direction of the skylight 30 is different in the adjacent areas, the opening / closing amount of the skylight near the boundary between the two areas is set to a small value. It is conceivable to give priority to the wind direction of an area, and to increase the number of skylights 30 that are controlled to open and close based on the wind direction, across the boundary between the two areas and to the other area according to the difference in wind power. .

  When the solar radiation amount of the solar radiation amount sensor 103 is large, the opening degree of the skylight 30 is increased, and when the solar radiation amount is very low, the opening degree is set to a medium level. If it is controlled to be fully closed when it senses rain, it is possible to prevent rain from entering the interior even during a sudden guerrilla rainstorm. The rainfall sensor 90 can detect the intensity of rainfall by adopting a configuration that detects the amount of rainfall per unit time or a configuration that detects the impact of rainfall.

  Thereby, while the environment in the cultivation room 1 is favorably controlled by the skylight control, it is possible to appropriately prevent the environment such as the temperature and humidity in the cultivation room 1 from largely changing due to the rainfall entering from the skylight 30. The maximum opening may be restricted when the wind power is large, and the maximum opening may be reduced when the wind power is small.

  When the detected room temperature detected by the room temperature sensor 74 is lower than the first set room temperature, the controller (controller) 26 operates the hot air heater (heat pump) 104.

  Further, the control unit (controller) 26 receives the detection value of the hot water temperature sensor 75 and outputs an operation signal to the first heating device 31, the second heating device 32, the pump 34, and the switching valve 73. Then, when the detected room temperature detected by the room temperature sensor 74 is lower than the second set room temperature, the target temperature of the hot water flowing through the second supply pipe 36 is calculated based on the second set room temperature. Note that the second set room temperature is set lower than the first set room temperature. Note that, as the second set room temperature increases, a linear function (based on an arithmetic expression in which the change rate of the target temperature with respect to a constant change amount of the second set room temperature becomes the same regardless of the second set room temperature, is the same) 3.) The target temperature is set high.

  Further, when the detected temperature of the hot water detected by the hot water temperature sensor 75 is lower than the target temperature, as the difference between the detected temperature and the target temperature increases, the heating pipe 33 side becomes linear (in proportion to the difference). The set flow rate ratio from the heating pipe 33 side is calculated and set so that the flow rate ratio that flows from the heating pipe 33 increases.

  Therefore, when the detected room temperature detected by the room temperature sensor 74 is lower than the second set room temperature and the detected temperature of the hot water is lower than the target temperature, the larger the difference between the detected temperature and the target temperature, the more the heating pipe 33 side. The switching valve 73 is operated based on the set flow rate from the heating pipe 33 which is set so as to increase the flow rate to be merged.

  When the set flow rate from the heating pipe 33 side is equal to or less than a first predetermined rate (0%), the combustion operation of the first heating device 31 and the combustion operation of the second heating device 32 are both performed. Stop. When the hot air heater (heat pump) 104 is continuously operated for a predetermined time (for example, 10 minutes) or more by the control unit 26, the combustion operation of the first heating device 31 and the second heating device 32 is performed for the first time. Is started.

  When the hot air heater (heat pump) 104 is stopped, the first heating device 31 and the second heating device 32 are also stopped. When the detected room temperature detected by the room temperature sensor 74 is lower than the second set room temperature and the detected temperature of the hot water is lower than the target temperature, the first predetermined flow rate from the heating pipe 33 side is set in advance. (0%) and less than a preset second predetermined ratio (100%), the combustion operation of only the second heating device 32 is performed and the combustion operation of the first heating device 31 is stopped. Let it.

  When the detected room temperature detected by the room temperature sensor 74 is lower than the second set room temperature and the detected temperature of the hot water is lower than the target temperature, the set flow rate from the heating pipe 33 side is set in advance to a second predetermined value. When the ratio is equal to or more than (100%), the first heating device 31 and the second heating device 32 are both operated by combustion. The above-described ratio is a ratio of the flow rate from the heating pipe 33 side to the combined flow rate flowing through the second supply pipe 36. The pump 34 is always operated regardless of the detected room temperature detected by the room temperature sensor 74 or the detected temperature of the hot water detected by the hot water temperature sensor 75.

  Therefore, when the temperature of the hot water flowing through the second supply pipe 36 becomes high and the difference between the detected temperature of the hot water and the target temperature of the hot water becomes small, the switching valve 73 is operated and the flow rate of the flow joining from the heating pipe 33 side is reduced. As the ratio decreases, the ratio of the flow rate that merges from the bypass pipe 72 side increases, and the warm water heated by the first heating device 31 or the second heating device 32 is supplied to the second supply pipe 36 and, consequently, the heating pipe 37. It is possible to reduce the amount supplied and prevent wasteful consumption of heat, thereby saving energy.

  When the temperature of the hot water flowing through the second supply pipe 36 becomes low and the difference between the detected temperature of the hot water and the target temperature of the hot water becomes large, the switching valve 73 is operated and the ratio of the flow rate that joins from the heating pipe 33 side is reduced. As the ratio increases, the ratio of the flow rate that merges from the bypass pipe 72 side decreases, and a large amount of warm water heated by the first heating device 31 or the second heating device 32 is supplied to the second supply pipe 36 and the heating pipe 37. The cultivation room (greenhouse) 1 can be efficiently heated.

  When the set flow rate ratio from the heating pipe 33 side is set smaller than the second predetermined rate, only the second heating device 32 is operated for combustion and the combustion operation of the first heating device 31 is stopped. As a result, the consumption of fossil fuel, which is a limited resource, can be suppressed and energy can be saved.

  When the set flow rate from the heating pipe 33 side is set to be larger than the predetermined rate, the first heating device 31 and the second heating device 32 are both operated by combustion to increase the heating amount of the hot water. Thus, the cultivation room (greenhouse) 1 can be efficiently heated. When the detection humidity detected by the humidity sensor 76 becomes higher than the target humidity and the skylight 30 is opened, the room temperature in the cultivation room 1 decreases. If the detected room temperature is low and the detected temperature of the hot water is lower than the target temperature, heating control is performed in the same manner as described above.

  Therefore, a greenhouse can be efficiently heated by using a heating device that heats by using heat generated by burning fuel other than fossil fuels (such as waste and by-products), and energy can be saved.

  Also, only when the inside of the cultivation room 1 is equal to or lower than a second set room temperature lower than the first set room temperature and the hot air heater (heat pump) 104 is continuously operated for a predetermined time (for example, 10 minutes) or more. Since the first heating device 31 and the second heating device 32 are operated by combustion, when the warm air heater (heat pump) 104 can supply the heating, the first heating device 31 and the second heating device 32 are inadvertently operated. It can be operated to avoid wasting fuel (especially oil) and save energy.

  In addition, it is effective to maintain the room temperature by providing a heat insulation curtain on the inner peripheral wall of the cultivation room 1 and adjusting the opening degree of the heat insulation curtain by the difference between the outside air temperature and the room temperature. The outside air temperature used as the control reference is corrected by the wind speed. For example, the outside air temperature is set to -1 ° C from the actual value when the wind speed is 5 m / S, and the outside air temperature is used when the wind speed is 10 m / S. The temperature is assumed to be -2 ° C from the actual value.

The conditions for using the thermal insulation curtain are, for example, when the amount of solar radiation is 50 W / m ² or less and the outside temperature is 5 ° C. or less, and the difference between the outside temperature and the room temperature is 100% at 15 ° C. and 50% at 5 ° C. Alternatively, it is changed stepwise by 10%.

  If the time for opening the thermal insulation curtain in the morning is made slower as the outside air temperature is lower, it is possible to prevent the condensation from rising due to the decrease in room temperature.

  FIG. 23 shows an automatic positioning robot 153 used when constructing a cultivation house. After the ground is leveled, the vehicle changes direction at the direction change points 155 to 160 from the start reference point 154 and automatically runs, and the reference point pin 162 is driven. The water thread 161 is stretched.

  FIG. 24 shows an automatic excavator 163 provided with an automatic altitude measuring device for automatically maintaining the level of the aircraft, and detecting and controlling the angles of the first arm 164, the second arm 165, and the bucket 166 with a sensor to control the angle. A hole having a depth b and a predetermined width a is excavated.

101 Titanium oxide 137 Solution supply device (pump)
138 Flow sensor 139 UV sterilization tank 142 Tank after sterilization 143 UV light source (UV lamp)

Claims (2)

In a cultivation facility in which a plurality of rows of a plurality of cultivation beds (5) are arranged in a cultivation room (1) and a nutrient solution is supplied from a nutrient solution supply device (7) to each of the cultivation beds (5),
A solar radiation sensor (103) for detecting the amount of solar radiation is provided, and a thermal insulation curtain provided on the inner peripheral wall of the cultivation room (1) is used based on the amount of solar radiation detected by the solar radiation sensor (103). ,
The water in the agricultural water tank and the raw water in the rainwater tank merge via valves (135a, 136a), respectively, and are stored in the ultraviolet sterilization tank (139) by the pump 137. The sterilized raw water is stored in the post-sterilization tank (142). A titanium oxide (101) is provided in the ultraviolet sterilization tank (139), and light from an ultraviolet lamp (143) is irradiated on the titanium oxide (101) to sterilize raw water.
A flow sensor (138) is provided on the raw water supply side of the ultraviolet sterilization tank (139), and the drive of the ultraviolet light source (143) is controlled based on the supply amount detected by the flow sensor (138).
The drainage from the cultivation bed 5 is first collected in a pre-sterilization tank (97), supplied from the pre-sterilization tank (97) to a sterilization tank (99) via a pre-sterilization pump (98), and The waste liquid sterilized in (99) is discharged by the pump (100) after sterilization and is reused as a nutrient solution.
The drainage sterilization tank (99) for storing the drainage is placed outdoors where sunlight is irradiated, and a titanium oxide (101) is provided in the drainage sterilization tank (99);
When the integrated amount of solar radiation detected by the solar radiation sensor (103) reaches a predetermined value, the controller determines that sterilization has been completed and activates the pre-sterilization pump (98) and the post-sterilization pump (100). Cultivation characterized by comprising a control device for driving and discharging the wastewater from the sterilization tank (99) and supplying new wastewater from the pre-sterilization tank (97) to the sterilization tank (99). Facility .   The thermal insulation curtain opens and closes at the difference between the outside temperature and room temperature,
  The thermal insulation curtain is used when the amount of solar radiation and the outside air temperature are equal to or less than a set value, and is changed stepwise according to a difference between the outside air temperature and the room temperature,
  The cultivation facility according to claim 1, wherein the outside air temperature is calculated to be lower as the wind speed increases.

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