JP2019198299A - House controller and agricultural house - Google Patents

Abstract

To provide a technique for controlling a ventilation fan for ventilating the inside of a house main unit to control an internal temperature of the house main unit to a target temperature.SOLUTION: A house controller 100 of the present disclosure controls an inner temperature of a house main unit by controlling at least one ventilation fan 30, 32, 34 installed in at least one end of opposite ends of a house main unit 12 in a longitudinal direction for ventilating an interior of the house main unit in an agricultural house 10 for growing crops 2. The house controller 100 comprises an environment acquisition unit 102 and a control unit 104. The environment acquisition unit acquires environment information inside and outside of the house main unit including at least the internal temperature, an external temperature of the house main unit, and solar radiation quantity. The control unit controls driving of the ventilation fan so that the internal temperature of the house body is at a target temperature, on the basis of ventilation ability of the ventilation fan for lowering the internal temperature of the house body by ventilation and of the environment information acquired by the environment acquisition unit.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a technique for controlling an internal temperature of a house body of an agricultural house that grows crops.

  Techniques for growing crops in agricultural houses are known. For example, Patent Document 1 describes a technique in which the inside of a house body of an agricultural house is ventilated with a suction fan and a ventilation fan, and the internal temperature of the house body is lowered as an internal environment of the house body.

JP 2008-22749 A

  However, the technique described in Patent Document 1 has a problem that it is not considered to control the internal temperature of the house body to the target temperature by controlling the driving of the suction fan and the ventilation fan.

  It is desirable for the present disclosure to provide a technique for controlling an internal temperature of a house body to a target temperature by controlling a ventilation fan that ventilates the inside of the house body.

  The house control device (100) of the present disclosure is installed in at least one end (24) of both ends in the longitudinal direction of the house body (12) in the agricultural house (10, 70) in which the crop (2) is grown. By controlling at least one ventilation fan (30 to 34, 80 to 88) for ventilating the inside of the house body, the internal temperature of the house body is controlled, and the environment acquisition unit (102, S420, S422, S430, S432, S470). ) And a control unit (104, S406 to S410, S424, S434, S440 to S448, S450 to S468, S470 to S480).

The environment acquisition unit acquires internal and external environmental information including at least the internal temperature, the external temperature of the house main body, and the amount of solar radiation.
The control unit drives the ventilation fan so that the internal temperature of the house body becomes the target temperature based on the ventilation capacity of the ventilation fan that reduces the internal temperature of the house body by ventilating and the environmental information acquired by the environment acquisition unit. Control.

Moreover, the agricultural house (10, 70) of this indication is an agricultural house which grows a crop (2), Comprising: A house main body (12), at least 1 ventilation fan (30-34, 80-88), And a house control device (100).
The house itself grows crops inside. At least one ventilation fan is installed at at least one end of both ends in the longitudinal direction of the house body, and ventilates the interior of the house body.

The house control device controls the internal temperature of the house body by controlling the drive of the ventilation fan. The house control device includes an environment acquisition unit (102, S420, S422, S430, S432, S470) and a control unit (104, S406 to S410, S424, S434, S440 to S448, S450 to S468, S470 to S480). And.
The environment acquisition unit acquires internal and external environmental information including at least the internal temperature, the external temperature of the house main body, and the amount of solar radiation.

  The control unit drives the ventilation fan so that the internal temperature of the house body becomes the target temperature based on the ventilation capacity of the ventilation fan that reduces the internal temperature of the house body by ventilating and the environmental information acquired by the environment acquisition unit. Control.

  According to these configurations of the present disclosure, the drive of the ventilation fan is controlled so that the internal temperature becomes the target temperature based on the ventilation capacity of the ventilation fan that reduces the internal temperature and the environmental information acquired by the environment acquisition unit. The internal temperature can be controlled to the target temperature with high accuracy.

  Note that the reference numerals in parentheses described in this column and in the claims indicate the correspondence with the specific means described in the embodiment described later as one aspect, and the technical scope of the present disclosure. It is not limited.

The schematic diagram which shows the agricultural house of 1st Embodiment. The schematic diagram which shows the structure inside and outside of an agricultural house. The flowchart which shows the main process of a house control process. The flowchart which shows the upper limit temperature calculation process of internal temperature. The characteristic view which shows the internal temperature which rises when a ventilation fan does not operate | move. The flowchart which shows a minimum temperature calculation process. The characteristic view which shows the internal temperature which falls according to the number of the ventilation fans to drive. The flowchart which shows the drive number calculation process of a ventilation fan. The characteristic view which shows the relationship between the drive number of a ventilation fan and ventilation capacity. The flowchart which shows the control process of a ventilation fan. The flowchart which shows the internal temperature feedback control process. The time chart which shows the feedback control process of internal temperature. The schematic diagram which shows the ventilation fan installed in the house main body in 2nd Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
An agricultural house 10 shown in FIG. 1 includes a house main body 12, ventilation fans 30, 32, and 34, various environmental adjusters described later, and various sensors.

  The house main body 12 includes, for example, a frame configured by combining metal members as structural members, and a covering material supported by the frame. As the covering material, a transparent synthetic resin film or glass is used. The house body 12 includes a gable-shaped roof portion 14, side portions 16 and 18 that extend in the longitudinal direction of the house body 12 and support the roof portion 14, and are installed at both longitudinal ends of the house body 12 to support the roof portion 14. The wife face portions 20 and 24 are integrally provided. This form of the house body 12 is an example, and is not intended to limit the configuration of the house body 12. Moreover, it does not prevent using other materials for the house main body 12, or forming in another shape.

  A window 22 for ventilating the inside and outside of the house body 12 is formed on the end face portion 20 by being rolled up by a driving force of a motor or the like. Three ventilating fans 30, 32, and 34 are installed on the wife surface portion 24. When driving at least one of the ventilating fans 30, 32, 34, the window 22 of the end face 20 on the opposite side in the longitudinal direction with respect to the end face 24 is opened.

  As shown in FIG. 2, the agricultural house 10 controls the interior of the house body 12 to an appropriate environment for growth by the house control device 100 for the purpose of growing a predetermined crop 2 inside the house body 12. To do. The crop 2 is cultivated on a soil in a predetermined container such as a bed 4 provided inside the house body 12. For example, a predetermined number of beds 4 are installed in the house main body 12 so as to form a line at equal intervals.

  In FIG. 2, the window 22 wound up by the motor 22 a and the ventilation fans 30 to 34 are illustrated on the side surface of the house body 12 for the convenience of showing the equipment installed inside and outside the house body 12. In addition, the window 22 and the ventilation fans 30 to 34 are installed on the end face portion of the house body 12 as described above.

  Inside the house main body 12, in addition to the above-described ventilation fans 30 to 34, a water supply device 36, a mist generator 38, a curtain 40, a heat pump 42, a heater 44, and a CO2 generator 46 are installed as various environmental adjusters. Yes.

  The agricultural house 10 includes a solar radiation amount sensor 50, a raindrop sensor 52, a wind direction sensor 54, a wind speed sensor 56, a temperature sensor 58, a humidity sensor 60, and an interior of the house body 12 as various sensors. A temperature sensor 62, a humidity sensor 64, and a CO2 sensor 66.

Hereinafter, various environmental adjusters will be described.
The three ventilation fans 30 to 34 ventilate the interior of the house body 12. When the house control device 100 drives the ventilation fans 30 to 34, the house control device 100 opens the window 22 of the wife face portion 20 on the opposite side in the longitudinal direction from the wife face portion 24 where the ventilation fans 30 to 34 are installed. As a result, the outside air introduced into the interior of the house body 12 by the ventilation fans 30 to 34 is discharged from the window 22 to the outside of the house body 12 as indicated by the dotted arrows in FIG. The window 22 is driven by a power source such as a motor and is controlled to be opened and closed by the house control device 100.

  The house control device 100 determines a ventilation fan to be driven and a ventilation fan to be stopped in order to set the internal temperature of the house body 12 to a target temperature. As the number of driven ventilation fans increases, the amount of ventilation in which the inside of the house body 12 is ventilated by the outside air increases, so the internal temperature of the house body 12 decreases. Control processing of the house control device 100 for the ventilation fans 30 to 34 will be described later.

  The water supply machine 36 is a water supply pump controlled by the house control device 100. The house control device 100 operates the water supply 36 at a predetermined time zone in one day to supply a target amount of nutrient solution to the soil. The house control device 100 controls the water supply device 36 so as to increase or decrease the supply amount of the nutrient solution with respect to the target amount according to the solar radiation amount detected by the solar radiation amount sensor 50.

  The mist generator 38 includes a mist tube installed at a position higher than the humidity sensor 64 inside the crop 2 and the house body 12 in the upper part of the house body 12. The mist tube has a plurality of nozzles attached to the wall of the tube to be watered, and is configured such that water is sprayed from the nozzles by adjusting the pressure that is passed through the tube by a pump or the like. Yes. When the mist tube ejects water in the form of a mist, the mist falls from the upper part of the house body 12 over a relatively long time, and the humidity of the house body 12 can be gradually increased.

  The mist generator 38 is controlled by the house control device 100. The house control device 100 controls the humidity environment of the house body 12 to be within the target range by operating the mist generator 38 in a predetermined time zone of the day, for example, and ejecting a target amount of fog. The house control device 100 controls the humidity environment of the house body 12 to a target range by adjusting the amount of mist ejected by the mist generator 38 according to the control index obtained from the measured humidity values at a plurality of locations of the house body 12. To do.

  The house control device 100 controls the mist generator 38 so as to increase or decrease the supply amount of mist with respect to the target amount according to the amount of solar radiation detected by the solar radiation amount sensor 50. When the relative humidity inside the house main body 12 measured by the humidity sensor 64 is low, the house control device 100 controls the mist generator 38 to operate to supply mist to the house main body 12 and increase the relative humidity. Do.

  The mist generator 38 is operated mainly when humidification is performed. However, the mist generator 38 can be operated as a temperature lowering device that promotes vaporization heat action by supplying mist to the house body 12 to lower the room temperature.

  The house body 12 is provided with a curtain 40 that can be opened and closed between a closed state in which external light incident from the roof portion 14 is shielded and an open state in which the crop 2 is irradiated with external light incident from the roof portion. It has been. The curtain 40 is a light shielding member having a function of adjusting the amount of solar radiation flowing into the house body 12, and is used in combination with a cooling device or a heating device to keep the house body 12 cool or warm.

  The curtain 40 is driven by a power source such as a motor and is controlled by the house control device 100. When the curtain 40 is opened and closed, the amount of solar radiation flowing into the house body 12 from the outside is adjusted, so that the rate of increase in the internal temperature of the house body 12 can be adjusted.

  Therefore, the house control device 100 is driven to close the curtain 40 when the internal temperature of the house body 12 is lowered, and is driven to open the curtain 40 when the internal temperature of the house body 12 is increased. Control to do. However, when used together with the heating device or when the external temperature of the house main body 12 is lower than the internal temperature, the house control device 100 controls the curtain 40 to be closed and keeps the heat.

  The house control device 100 adjusts the opening / closing amount of the curtain 40 in accordance with a control index obtained from measured values of temperatures at a plurality of locations inside the house body 12, and controls the temperature environment of the house body 12 to a target range.

  The heat pump 42 can perform a heating operation for heating the interior of the house body 12 or a cooling operation for cooling the interior of the house body 12. Therefore, the heat pump 42 is one of a plurality of heating devices provided in the agricultural house 10. The main body of the heat pump 42 is installed outdoors of the house main body 12, and the conditioned air can be blown to an arbitrary predetermined position such as around the crop 2 through a duct extending from the main body. The temperature around the crop 2 can be controlled by the conditioned air from the heat pump 42.

The heat pump 42 constitutes a cycle in which the refrigerant circulates in a circuit in which a plurality of heat exchangers, a compressor, a decompression device, and the like are connected in a ring shape.
The heat pump 42 functions as a temperature raising device when the outside air heated by the heat dissipation heat exchanger by the heat dissipation action of the refrigerant is blown as warm air, and the outside air cooled by the cooling heat exchanger by the heat absorption action of the refrigerant When it blows as cold air, it functions as a temperature lowering device. The heat pump 42 can also function as a dehumidifying device that absorbs moisture from the air inside the house body 12 and dehumidifies the inside of the house body 12.

  When the heat pump 42 performs the heating operation, the internal temperature of the house main body 12 increases, so that the relative humidity of the house main body 12 decreases. The house control device 100 controls the operation of the heat pump 42 according to the control index obtained from the measured values at a plurality of locations inside the house body 12, and controls the temperature environment and humidity environment of the house body 12 to the target range.

  The heater 44 is an air conditioner that can blow warm air to a predetermined position such as around the crop 2. The heater 44 functions as a temperature raising device that can raise the ambient temperature of the crop 2 with the heating air. Therefore, the heater 44 is one of a plurality of heating devices provided in the agricultural house 10.

  The heater 44 supplies air heated by, for example, an electric heater, a hot water heater, a combustion heater, or the like, into the house body 12. When the heater 44 performs the heating operation, the internal temperature of the house main body 12 increases, so that the relative humidity of the house main body 12 decreases.

  The house control device 100 controls the heater 44 so as to maintain the internal temperature of the house body 12 around the crop 2 at a target temperature suitable for growth. The house control device 100 controls the operation of the heater 44 and the like according to the control index obtained from the measured values at a plurality of locations inside the house body 12, and controls the temperature environment and the humidity environment of the house body 12 within the target range. To do.

  The CO2 generator 46 supplies CO2 to the house body 12. In order to promote photosynthesis, the house control device 100 controls the CO2 generator 46 so as to keep the CO2 concentration inside the house main body 12, particularly around the crop 2 appropriately. For example, the house control device 100 operates the CO2 generator 46 during a predetermined time of the day, and controls the CO2 concentration inside the house body 12 to be a target value. The CO2 generator 46 is a photosynthesis promoting device.

  The house control device 100 controls the operation of the CO2 generator 46 in accordance with a control index obtained from the measured values of the CO2 concentration at a plurality of locations inside the house body 12 to target the CO2 concentration environment inside the house body 12. Control to range. Further, the CO2 generator 46 can raise the internal temperature of the house body 12 by generating CO2. The CO2 generator 46 is one of a plurality of heating devices provided in the agricultural house 10.

Hereinafter, various sensors will be described.
The solar radiation amount sensor 50 detects the amount of solar radiation that falls on the house body 12. The solar radiation amount information detected by the solar radiation sensor 50 is used to estimate the amount of heat that is input to the house control device 100 and flows into the house main body 12, and is used for opening / closing control of the curtain 40 and room temperature control. The detected amount of solar radiation can also be used to determine whether it is rainy or at night, and during sunny days.

  The raindrop sensor 52 is a rain detection sensor provided outside the house body 12 and capable of detecting the presence or absence of rainfall. When rain is detected by the raindrop sensor 52, the window 22 is controlled to be closed in order to prevent raindrops from being directly applied to the crop. This prevents crops from becoming sick.

  The raindrop sensor 52 is, for example, a sensor that detects rain adhering to the panel as moisture, and detects electrical resistance between predetermined electrodes. The detected value of electrical resistance is input to the house control apparatus 100, and the house control apparatus 100 determines that rain is currently falling when the detected value is equal to or less than a certain resistance value.

  The raindrop sensor 52 may be a sensor that detects rain adhering to the panel as water pressure. In this case, the pressure detected by the raindrop sensor 52 is input to the house control device 100, and the house control device 100 determines that it is currently raining when the detected value is equal to or greater than a certain pressure value.

  The wind direction sensor 54 detects the wind direction outside the house body 12. The wind direction information detected by the wind direction sensor 54 is input to the house control device 100 and used for opening degree control of the window 22 as the wind direction with respect to the window 22.

  The wind speed sensor 56 detects the wind speed outside the house body 12. The wind speed information detected by the wind speed sensor 56 is input to the house control device 100 and is used for opening degree control of the window 22 as the wind speed with respect to the window 22.

  The temperature sensor 58 detects the temperature outside the house body 12 and sends it to the house control device 100. The humidity sensor 60 detects the humidity outside the house body 12 and sends it to the house control device 100.

  The plurality of temperature sensors 62 detect the temperature inside the house body 12, for example, the temperature around the crop 2, and send it to the house control device 100. The plurality of humidity sensors 64 are humidity detection means for detecting the internal humidity of the house main body 12, for example, the humidity around the crop 2, and send the detected humidity to the house control device 100.

  The plurality of CO2 sensors 66 are CO2 concentration detection means for detecting the CO2 concentration inside the house main body 12, for example, the CO2 concentration around the crop 2, and sends the detected CO2 concentration to the house control device 100.

  The house control device 100 controls the various environmental conditioners provided in the agricultural house 10 based on the environmental information inside and outside the house body 12 obtained from the various sensors, and the inside of the house body 12 grows the crop 2. Control the environment appropriately.

  The house control apparatus 100 is mainly configured by a microcomputer including a CPU, a semiconductor memory such as a RAM, a ROM, and a flash memory, and an input / output interface. Hereinafter, the semiconductor memory is also simply referred to as a memory. The house control apparatus 100 may be equipped with one microcomputer or a plurality of microcomputers.

  Various functions of the house control device 100 are realized by the CPU executing a program stored in the non-transitional physical recording medium. In this example, the memory corresponds to a non-transitional tangible recording medium that stores a program. When the CPU executes this program, a method corresponding to the program is executed.

  The house control apparatus 100 includes an environment acquisition unit 102 and a control unit 104 as a functional configuration realized by a CPU executing a program. The technique for realizing these elements constituting the house control apparatus 100 is not limited to software, and some or all of the elements may be realized using one or a plurality of hardware. For example, when the above function is realized by an electronic circuit that is hardware, the electronic circuit may be realized by a digital circuit including a large number of logic circuits, an analog circuit, or a combination thereof.

  The house control device 100 is connected to a personal computer 110, a control panel (not shown), a portable terminal, and the like. The user can use the operation panel of the house control device 100, the operation unit of the personal computer 110, the control panel, the form terminal, and the like to set the environment such as the internal temperature of the house main body 12 and set the time. And the user can confirm the present driving | running state through display screens, such as a portable terminal device.

  The environment acquisition unit 102 obtains the amount of solar radiation, the presence / absence of precipitation, the wind direction, the wind speed, the temperature inside and outside the house body 12, the humidity inside and outside the house body 12, The internal CO2 concentration of 12 is acquired.

  Based on the environmental information which the environment acquisition part 102 acquires from various sensors, the control part 104 is the ventilation fans 30-34, the water supply machine 36, the mist generator 38, the curtain 40, the heat pump 42, and the heater 44. By controlling various environmental adjusters such as the CO2 generator 46, the environment inside the house body 12 such as temperature, humidity, and CO2 concentration inside the house body 12 is adjusted to an environment suitable for the growth of the crop 2.

[1-2. processing]
Hereinafter, the process which controls the drive with respect to the ventilation fans 30-34 and controls the internal temperature of the house main body 12 is demonstrated.

(1) Main process The main process of the house control which the house control apparatus 100 performs is demonstrated based on the flowchart of FIG. The flowchart of FIG. 3 is executed when the house control apparatus 100 is activated.

  In S <b> 400, the house control device 100 executes an initialization process for the input / output interface, the memory, and the like of the house control device 100. In S <b> 402, the house control device 100 calculates the upper limit temperature at which the internal temperature of the house body 12 of the house body 12 increases without driving the ventilation fans 30 to 34 and closing the window 22. Details of the processes in S402 to S410 will be described later.

  In S404, the house control apparatus 100 calculates a lower limit temperature at which the internal temperature of the house body 12 decreases according to the number of driving the ventilation fans 30 to 34. In S406, the house control apparatus 100 calculates the number of drive of the ventilation fans 30 to 34 necessary for controlling the internal temperature of the house body 12 to the target temperature.

  In S <b> 408, the house control apparatus 100 controls the driving of the ventilation fans of the number of drives calculated in S <b> 406 among the ventilation fans 30 to 34. In S410, the house control device 100 feedback-controls the number of ventilation fans to be driven based on the temperature difference between the actual internal temperature of the house main body 12 detected by the temperature sensor 62 and the target temperature of the internal temperature. After execution of S410, the process proceeds to S402.

(2) Upper Limit Temperature Calculation Processing The upper limit temperature calculation processing executed in S402 in FIG. 3 will be described based on the flowchart in FIG.

  In S <b> 420 and S <b> 422, the environment acquisition unit 102 acquires the amount of solar radiation applied to the house main body 12 from the solar radiation amount sensor 50, and acquires the outside air temperature outside the house main body 12 from the temperature sensor 58.

  In S424, the control unit 104 does not drive the ventilation fans 30 to 34, and the upper limit temperature when the internal temperature of the house body 12 rises in the state where the open part of the house body 12 including the window 22 is fully closed is set to the upper limit temperature. And the amount of solar radiation acquired by the environment acquisition unit 102 in S420 and S422 and the characteristics of the external environment represented by the external temperature. A characteristic 200 shown in FIG. 5 representing the relationship between the upper limit temperature, the amount of solar radiation, and the external temperature is stored in advance in a memory by experiment or simulation using the amount of solar radiation and the external temperature as parameters.

(3) Lower Limit Temperature Calculation Processing The lower limit temperature calculation processing executed in S404 in FIG. 3 will be described based on the flowchart in FIG.

  In S <b> 430 and S <b> 432, the environment acquisition unit 102 acquires the amount of solar radiation applied to the house body 12 from the solar radiation amount sensor 50, and acquires the external temperature of the house body 12 from the temperature sensor 58.

  When the controller 104 changes the number of driving the ventilation fans 30 to 34 to 1, 2, and 3 in S434, the lower limit temperature when the internal temperature of the house body 12 decreases from the upper limit temperature is set to the lower limit temperature, and S430. , Based on the characteristics of the external environment such as the amount of solar radiation and the external temperature acquired by the environment acquisition unit 102 in S432. The characteristics 210, 212, and 214 shown in FIG. 7 representing the relationship between the number of driving the ventilation fans 30 to 34, the lower limit temperature, and the external environment such as the amount of solar radiation and the external temperature are generated by experiment or simulation and stored in the memory in advance. It is remembered.

(4) Drive Number Calculation Processing The ventilation fan drive number calculation processing executed in S406 of FIG. 3 will be described based on the flowchart of FIG.

  In S440, the control unit 104 calculates the ventilation capacity corresponding to the number of driving the ventilation fans 30 to 34 by the following equations (1) to (3) based on the characteristics 210, 212, and 214 shown in FIG. The ventilation capacity represented by the equations (1) to (3) represents how many times the internal temperature of the house main body 12 decreases in accordance with the number of driving the ventilation fans 30 to 34.

Ventilation capacity with 1 drive = Current upper limit temperature-Lower limit with 1 drive number (1)
Ventilation capacity with drive number 2 = current upper limit temperature-lower limit temperature with drive number 2 (2)
Ventilation capacity with 3 drives = Current upper limit temperature-Lower limit with 1 drive number (3)
In S442, the control unit 104 generates a characteristic 220 representing the relationship between the number of drive of the ventilation fan and the ventilation capacity shown in FIG. 9 based on the calculation result of S442.

In S444, the control unit 104 calculates the required ventilation capacity based on the following equation (4).
Required ventilation capacity = upper limit temperature-target temperature of internal temperature (4)
The required ventilation capacity calculated by the equation (4) is that the inside of the house body 12 is ventilated by the ventilation fans 30 to 34 from the upper limit heat amount inside the house body 12 in the state of the upper limit temperature. It shows whether the internal temperature becomes the target temperature if the amount of heat is reduced.

  In S446, the control unit 104 determines the number of drive of the ventilation fan corresponding to the required ventilation capacity calculated by Expression (4) from the characteristic 220 shown in FIG. 3. Interpolate the value of ventilation capacity when 3. As shown in FIG. 9, when the number of driving of the ventilation fans 30 to 34 is the required ventilation capacity between 1 and 2, the number of driving of the ventilation fans 30 to 34 is calculated as 1.4 from the characteristic 220, for example.

  In S <b> 448, the control unit 104 calculates an integer not exceeding the number from the number of driving of the ventilation fans 30 to 34 calculated in S <b> 446. If the drive number of the ventilation fans 30 to 34 calculated in S446 is 1.4 as described above, the integer calculated in S448 is 1.

(5) Ventilation fan control process The ventilation fan control process performed by S408 of FIG. 3 is demonstrated based on the flowchart of FIG. 10, the ventilation fan 1 corresponds to the ventilation fan represented by reference numeral 30, the ventilation fan 2 corresponds to the ventilation fan represented by reference numeral 32, and the ventilation fan 3 corresponds to the ventilation fan represented by reference numeral 34.

  In S450, the control unit 104 determines whether or not the ventilation fan drive number calculated in the drive number calculation process shown in FIG. If the determination in S450 is No, that is, if the drive number is not 1, the process proceeds to S458.

  If the determination in S450 is Yes, that is, the number of drives is 1, in S452, S454, and S456, the control unit 104 stops the ventilation fans 32 and 34 and sets the number of ventilation fans to be driven by driving the ventilation fan 30 to 1. .

  In S458, the control unit 104 determines whether or not the number of drive of the ventilation fan is two. If the determination in S458 is No, that is, if the drive number is not 1 or 2, the process proceeds to S464.

  If the determination in S458 is Yes, that is, if the number of drives is 2, in S460, S462, and S456, the control unit 104 stops the ventilating fan 34, and drives the ventilating fans 30 and 32 to drive the number of ventilating fans to two. .

  In S464, the control unit 104 determines whether or not the number of drive of the ventilation fan is three. If the determination in S464 is No, that is, if the drive number is not 1 to 3 but 0, the process proceeds to S468.

  If the determination in S464 is Yes, that is, the number of drives is 3, in S466, S462, and S456, the control unit 104 sets the number of ventilation fans to be driven by driving the ventilation fans 30 to 34 to 3.

In S468, the control unit 104 stops the ventilation fans 30 to 34 and sets the number of ventilation fans to be driven to zero.
(6) Temperature Feedback Control Process The temperature feedback control process executed in S410 of FIG. 3 will be described based on the flowchart of FIG. In the flowchart of FIG. 11, the ventilation fan 3 corresponds to the ventilation fan represented by reference numeral 34.

In S470, the control unit 104 calculates the temperature difference between the internal temperatures, which is the temperature difference between the internal temperature 230 of the house main body 12 and the target temperature shown in FIG.
Difference in internal temperature = actual internal temperature-target temperature of internal temperature (5)
In S472, the control unit 104 determines whether or not the temperature difference between the internal temperatures calculated from the equation (5) is larger than a predetermined temperature difference Δt shown in FIG. The predetermined temperature difference Δt is a value set in advance to determine whether or not it is necessary to decrease the internal temperature 230 by increasing the number of driving the ventilation fans by one because the temperature difference between the internal temperatures is large. It is.

  If the determination in S472 is No, that is, if the temperature difference between the internal temperatures is equal to or less than the predetermined temperature difference Δt shown in FIG. 12, the control unit 104 determines that there is no need to decrease the internal temperature 230, and the process proceeds to S478. Transition.

  If the determination in S472 is Yes, that is, if the temperature difference between the internal temperatures is greater than the predetermined temperature difference Δt, the control unit 104 determines in S474 whether the number of currently driven ventilation fans is less than 3. To do. If the determination in S474 is No, that is, if the number of currently driven ventilation fans is 3 or more, the process proceeds to S478. In the present embodiment, since the number of ventilation fans is three in total, the number of currently driven ventilation fans being three or more indicates that all the ventilation fans 30 to 34 are driven.

  If the determination in S474 is Yes, that is, if the number of currently driven ventilation fans is less than 3, in S476, the control unit 104 drives the non-driven ventilation fan 34 to lower the internal temperature 230. Increase the number to drive the ventilation fan by one.

  In S478, the control unit 104 determines whether or not the internal temperature is equal to or lower than the target temperature and the temperature difference between the internal temperatures is equal to or smaller than 0. The determination of S478 is executed when the determination of S472 is No, that is, when the temperature difference between the internal temperatures is equal to or less than the predetermined temperature difference Δt, or the internal temperature 230 does not need to be decreased, or the determination of S474 Is No, that is, all the ventilation fans 30 to 34 are currently driven.

  Therefore, when it is not necessary to lower the internal temperature 230, or when all the ventilation fans 30 to 34 are currently driven, the determination of S478 is Yes, that is, the internal temperature becomes equal to or lower than the target temperature. If the temperature difference is 0 or less, in S480, the control unit 104 stops the ventilation fan 34 when the ventilation fan 34 is driven, decreases the number of ventilation fans to be driven by 1, and stops the ventilation fan 34. If stopped, the stopped state is maintained.

  On the other hand, when it is not necessary to lower the internal temperature 230 and the determination in S478 is No, that is, when the temperature difference between the internal temperatures is larger than 0, the control unit 104 sets the number of driving the ventilation fan to one. It is determined that there is no need to increase and lower the internal temperature 230, and the present process is terminated, and the state where the ventilation fans 30 to 34 are currently being driven and controlled is maintained.

  Alternatively, when the number of currently driven ventilation fans is 3 or more and the determination in S478 is No, that is, when the temperature difference between the internal temperatures is larger than 0, the control unit 104 drives the ventilation fans any more. Since the number to be increased cannot be increased, the present process is terminated, and the state where all the ventilation fans 30 to 34 are currently driven and controlled is maintained.

[1-3. effect]
In the first embodiment described above, the following effects can be obtained.
(1a) The ventilation capacity of the ventilation fans 30 to 34 that reduce the internal temperature of the house body 12 is controlled by changing the number of driven ventilation fans 30 to 34. Thereby, the internal temperature of the house main body 12 can be made into target temperature.

  (1b) The feed forward control which determines the number which drives the ventilation fans 30-34 from the required ventilation capacity is performed, and also the ventilation fan 34 according to the magnitude relationship between the difference in internal temperature of the house main body 12 and a predetermined temperature difference. Feedback control is performed to determine whether to drive or stop. Thereby, the internal temperature of the house main body 12 can be made into target temperature with high precision.

In the first embodiment described above, the end face portion 24 corresponds to the end portion.
S420, S422, S430, S432, and S470 correspond to the processing of the environment acquisition unit, and the processing of S406 to S410, S424, S434, S440 to S448, S450 to S468, and S470 to S480 correspond to the processing of the control unit. .

[2. Second Embodiment]
[2-1. Difference from the first embodiment]
Since the basic configuration of the second embodiment is the same as that of the first embodiment, differences will be described below. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is referred to.

  As shown in FIG. 13, large, medium and small ventilation fans 80 to 88 having different sizes are installed on the end face portion 24 of the house main body 12 of the agricultural house 70. The size of the ventilation fans 80 and 82 is the largest, and the size of the ventilation fans 86 and 88 is the smallest. The size of the ventilation fan 84 is between the ventilation fans 80 and 82 and the ventilation fans 86 and 88. The larger the ventilation fan, the higher the ventilation capacity.

  The characteristics corresponding to FIG. 7 generated by experiments or simulations based on the combination of the driven and stopped ventilation fans among the ventilation fans 80 to 88 are generated in advance and stored in the memory.

  The control unit 104 determines the number and size of the ventilation fans to be driven and the ventilation based on the characteristics corresponding to FIG. 7 generated by experiments or simulations based on the combination of the ventilation fan to be driven and the ventilation fan to be stopped among the ventilation fans 80 to 88. A characteristic corresponding to FIG. 9 representing the relationship with the ability is generated.

And the control part 104 determines the ventilation fan to drive among the ventilation fans 80-88 based on this characteristic.
[2-2. effect]
In the second embodiment described above, the following effect (2a) can be obtained in addition to the effects (1a) and (1b) of the first embodiment.

(2a) The internal temperature of the house body 12 can be set to the target temperature with high accuracy by combining ventilation fans having different ventilation capabilities.
[3. Other Embodiments]
As mentioned above, although embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, and can carry out various modifications.

  (1) In the above embodiment, the ventilation fan is controlled by either driving or stopping the ventilation fan to adjust the ventilation capacity of the ventilation fan. On the other hand, you may adjust the ventilation capability for every ventilation fan by controlling the drive current of a ventilation fan.

  (2) In the above embodiment, a ventilation fan is installed only in one of the two face sections 20, 24 to introduce outside air into the house body 12, and from the window 22 of the other face section 20. The inside air of the house body 12 was discharged to the outside of the house body 12.

  On the other hand, a ventilation fan is installed in each of the two wife face portions 20 and 24, the outside air is introduced into the interior of the house body 12 by the ventilation fan installed on one wife face portion, and the ventilation fan installed on the other wife face portion. Thus, the inside air of the house body 12 may be discharged to the outside of the house body 12.

  (3) A plurality of functions of one constituent element in the above embodiment may be realized by a plurality of constituent elements, or a single function of one constituent element may be realized by a plurality of constituent elements. In addition, a plurality of functions possessed by a plurality of constituent elements may be realized by one constituent element, or a single function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may abbreviate | omit a part of structure of the said embodiment. Further, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects contained in the technical thought specified only by the wording described in the claim are embodiment of this indication.

  (4) In addition to the house control device 100 described above, agricultural houses 10 and 70 having the house control device 100 as components, a control program for causing a computer to function as the house control device 100, and the control program recorded The present disclosure can also be realized in various forms such as a recording medium and a control method.

10, 70: Agricultural house, 12: House body, 24: Wife face, 30-34, 80-88: Ventilation fan, 100: House control device, 102: Environment acquisition unit, 104: Control unit

Claims (6)

In the agricultural house (10, 70) for growing the crop (2), at least one for ventilating the interior of the house body installed at at least one end (24) at both longitudinal ends of the house body (12). A house control device (100) for controlling an internal temperature of the house body by controlling a ventilation fan (30 to 34, 80 to 88),
An environment acquisition unit (102, S420, S422, S430, S432, S470) configured to acquire environmental information inside and outside the house body including at least the internal temperature, the external temperature of the house body, and the amount of solar radiation; ,
Based on the ventilation capacity of the ventilation fan that lowers the internal temperature by ventilating and the environment information acquired by the environment acquisition unit, the drive of the ventilation fan is controlled so that the internal temperature becomes a target temperature. The configured control unit (104, S406 to S410, S424, S434, S440 to S448, S450 to S468, S470 to S480),
A house control device comprising: The house control device according to claim 1,
A plurality of the ventilation fans are installed at the end,
The said control part (S424, S434, S440-S448) drives so that the said internal temperature may become the said target temperature based on the said ventilation capability according to the number of the said ventilation fans to drive among several said ventilation fans. Configured to determine the number of ventilation fans;
House control device. The house control device according to claim 2,
The control unit reaches the internal temperature lowering according to an upper limit temperature at which the internal temperature reaches in a state where all the ventilation fans are stopped and the number of the ventilation fans to be driven among the plurality of ventilation fans from the upper limit temperature. Based on the ventilation capacity represented by a temperature difference with a lower limit temperature, the number of the ventilation fans to be driven among the plurality of ventilation fans is determined so that the internal temperature becomes the target temperature.
House control device. It is a house control device according to claim 2 or 3,
The controller (S470 to S476) determines the number of the ventilation fans to be driven when the internal temperature rises higher than the target temperature and the temperature difference between the internal temperature and the target temperature becomes larger than a predetermined temperature difference. Configured to increase by one,
House control device. The house control device according to any one of claims 2 to 4,
The control unit (S470 to S474, S478, S480) is configured to decrease the number of the ventilation fans to be driven by one when the internal temperature is equal to or lower than the target temperature.
House control device. An agricultural house (10, 70) for growing crop (2),
A house body (12) configured to grow the crop internally;
At least one ventilation fan (30-34, 80-88) installed at at least one end (24) at both longitudinal ends of the house body and configured to ventilate the interior of the house body;
A house control device (100) configured to control the internal temperature by controlling the drive of the ventilation fan;
With
The house control device
An environment acquisition unit (102, S420, S422, S430, S432, S470) configured to acquire environmental information inside and outside the house body including at least the internal temperature, the external temperature of the house body, and the amount of solar radiation; ,
Based on the ventilation capacity of the ventilation fan that lowers the internal temperature by ventilating and the environmental information acquired by the environment acquisition unit, the drive of the ventilation fan is controlled so that the internal temperature becomes a target temperature. The configured control unit (104, S406 to S410, S424, S434, S440 to S448, S450 to S468, S470 to S480),
Comprising
Agricultural house.

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