TW202139827A - Temperature control method, temperature control device, temperature control program, and temperature control system - Google Patents

Abstract

In a temperature control method used in this temperature control device, the internal temperature of a cultivation facility is controlled by acquiring the internal temperature and the internal humidity of the cultivation facility and sequentially switching between a first operation mode, a second operation mode, and a third operation mode, a side window and a roof window that can be opened and closed and that separate the interior of the cultivation facility from the exterior are closed and an air conditioner is made to operate so that the internal temperature becomes a predetermined target temperature in the first operation mode, the internal dew point temperature of the cultivation facility is calculated on the basis of the internal temperature and the internal humidity and the air conditioner is made to operate with the side window and the roof window closed so that the surface temperature of fruit becomes higher than the internal dew point temperature in the second operation mode, and the air conditioner is stopped with the side window and the roof window open in the third operation mode.

Description

Temperature control method, temperature control device, temperature control program and temperature control system

This disclosure relates to a technique for controlling the internal temperature of fruit cultivation facilities.

In the agricultural field, facility cultivation using steel-frame greenhouses or pipe houses (hereinafter referred to as "greenhouses") has become increasingly popular in recent years.

Facility cultivation is to isolate the greenhouse for cultivating vegetables from the outside, so that different environmental conditions can be achieved in the greenhouse. Thereby, the influence of weather or weather conditions can be suppressed, vegetable cultivation can be carried out for a long time or throughout the year, and a stable vegetable supply can be realized. In addition, even in areas where it was difficult to cultivate vegetables in the past, it has become possible to cultivate and produce vegetables. Since it also contributes to the reduction of local production, local consumption and food mileage, the SDGs (Sustainable Development Goals) , Sustainable Develpoment Goals) has gradually attracted attention.

Generally speaking, it is known that the greater the difference in temperature between day and night, the more delicious the fruit will become.

However, for example, in subtropical regions, there is almost no difference in temperature between day and night. Therefore, it is conceivable that at night, the inside of the greenhouse is cooled by an air conditioner to produce a difference in temperature between day and night.

Here, since the inside of the greenhouse is cooled by air-conditioning at night, it is necessary to completely close the openable and closable windows installed in the greenhouse. However, if the windows of the greenhouse are completely closed during the day, the temperature in the greenhouse will become too high, so it is necessary to open the windows during the day.

After closing the windows at night and using an air conditioner to cool the greenhouse, when the windows are opened the next morning, the surface temperature of the fruit will be greatly different from the temperature in the greenhouse. In addition, when the cold fruit comes into contact with the outside high temperature and high humidity air, there is a risk of condensation on the surface of the fruit. Condensation on the surface of the fruit is not only considered to be a cause of fruit cracking, but also known to be a cause of infection by filamentous fungi (mold, etc.).

For example, Patent Document 1 discloses a device for preventing fruit cracking, which regulates the temperature and humidity in the cherry heating facility during the daytime in the cherry heating facility by adjusting the temperature in the cherry heating facility so that the The range of water content and the value below which does not cause dew on the cherry fruit.

However, in the above-mentioned conventional technology, although the temperature in the facility is adjusted according to the humidity in the facility to adjust the daytime temperature and humidity in the facility to a value below which does not cause dew on the cherry fruit, it does not take into consideration The surface temperature of the fruit. Therefore, in the above-mentioned conventional technology, it is difficult to reliably prevent condensation from occurring on the surface of the fruit, and it is conceivable that further improvement is required. Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2002-153147

This disclosure is an invention made to solve the above-mentioned problems, and its object is to provide a technique that can reliably prevent condensation on the surface of the fruit.

One aspect of the temperature control method of the present disclosure is a temperature control method in a temperature control device that controls the internal temperature of a fruit cultivation facility, which obtains the internal temperature and internal humidity of the aforementioned cultivation facility, and sequentially switches the first operation mode , The second operation mode and the third operation mode are used to control the internal temperature of the cultivation facility. The first operation mode is to close the openable and closable window that separates the inside and the outside of the cultivation facility. The air conditioner operates so that the internal temperature becomes a predetermined target temperature, and the second operation mode is to calculate the internal dew point temperature of the cultivation facility based on the internal temperature and the internal humidity, and make the internal dew point temperature of the cultivation facility closed with the windows closed. The air conditioner operates so that the surface temperature of the fruit becomes higher than the internal dew point temperature, and the third operation mode is to stop the air conditioner with the window opened.

According to the present disclosure, it is possible to reliably prevent condensation on the surface of the fruit.

The form used to implement the invention (Knowledge and insights that became the basis of this disclosure) In facility cultivation, at a high temperature above 30°C, the result, hypertrophy and coloration will become poor. In addition, if the temperature is above 35°C, pollen fertility will decrease and fruit drop will occur. In addition, when the night temperature is high, the consumption caused by respiration increases, and the fruit fat becomes bad. On the other hand, when the temperature during the day is below 20°C and the temperature at night is 4°C to 8°C, the differentiation and development of the various organs of the flower will be promoted, which will increase the number of ovary and cause the occurrence of deformed fruits. many.

In addition, there is also an appropriate range for the relative humidity. For example, if the relative humidity exceeds 90%, diseases such as leaf mold are likely to occur. In addition, in an environment with an extremely high relative humidity, condensation may sometimes occur on the surface of the fruit. It is generally believed that condensation on the surface of the fruit will cause fruit cracking. After the fruit is cracked, the commodity value of the fruit decreases, and most of it becomes unsellable. In addition, condensation on the surface of the fruit can also become a cause of disease transmission such as leaf mold.

On the other hand, if the relative humidity is extremely low, for the purpose of suppressing excessive evapotranspiration, plants will close their stomata to inhibit photosynthesis.

Although the temperature and humidity control in the greenhouse is also implemented manually by vegetable producers, in recent years, it has gradually been implemented automatically using integrated environmental control devices based on measurement data of temperature, humidity, and light intensity inside and outside the greenhouse. increasing. In addition, air-conditioning equipment such as heat pump air conditioners and combustion-type heaters cost operating costs. Therefore, in most cases, the use of air-conditioning equipment is controlled to a certain extent, and controls such as ventilation and shading are performed.

In addition, in facility cultivation, the environment in the greenhouse is controlled by environmental control devices such as side windows, skylights, ventilators, curtains, air conditioners (heat pump air conditioners and combustion heaters, etc.), sprays, etc. The environment becomes an appropriate environment for the growth of the plant (vegetables) to be cultivated, that is, it becomes an ideal environment for the growth of the vegetable to be cultivated.

For example, in the case of tomato cultivation, it is generally considered that the optimum temperature for growth is 5~40℃, more preferably the range of 10~35℃, the optimum temperature during the day is 25~30℃, and the optimum temperature at night is 10~15℃ , Will perform environmental control such as making the temperature in the greenhouse fall within the above range.

In addition, there is a difference between the proper environment in the greenhouse during the daytime when photosynthesis is carried out and the nighttime when only breathing is carried out. In the case of tomatoes, the temperature in the daytime is 25~30℃ as the target value, and the temperature in the night is 10~15℃ as the target value to control the temperature in the greenhouse.

Therefore, during the day, when the temperature control at night is switched to the temperature control during the day, a situation where the temperature in the greenhouse changes greatly. At this time, depending on the temperature and humidity conditions in the greenhouse, the difference between the surface temperature of the fruit and the temperature in the greenhouse may increase, and as a result, condensation may occur on the surface of the fruit.

Specific examples are shown below.

As a cultivation area, it is premised on a hot and humid climate represented by the subtropical region. An area with a hot and humid climate has high temperature and high humidity regardless of day and night. In this area, the greenhouse is completely closed at night, and heat pump air conditioners are used for cooling. On the other hand, after sunrise, the temperature in the greenhouse rises with sunlight, and heat pump air conditioners alone cannot be sufficiently cooled. Therefore, the heat pump air conditioner is stopped during the day and the outside air is actively introduced through ventilation. This suppresses extreme temperature rise.

Here, imagine the case of tomato cultivation. At night, the temperature control performed by the heat pump air conditioner cooling in the greenhouse is switched to temperature control by introducing outside air before and after sunrise, but at the time of this switching, condensation may sometimes occur on the tomato fruit.

This is based on the following reasons.

(1) During the night air-conditioning period, the temperature in the greenhouse becomes lower than the outside air, and the temperature of the tomato fruit is similarly lower.

(2) When switching to temperature control by introducing outside air, air with a higher temperature and higher humidity than the inside of the greenhouse will flow in.

(3) The heat capacity of tomato fruit is large. Therefore, even if the surrounding air temperature suddenly rises, the temperature of the tomato fruit will rise later.

(4) As a result, after switching to temperature control by introducing outside air, the high-temperature and high-humidity air that has flowed into the greenhouse is cooled by the tomato fruit. Since the air around the tomato fruit is below the dew point temperature, condensation will occur on the surface of the tomato fruit.

In order to solve the above problems, the temperature control method of one aspect of the present disclosure is a temperature control method in a temperature control device that controls the internal temperature of a fruit cultivation facility, which obtains the internal temperature and internal humidity of the aforementioned cultivation facility and relies on The first operation mode, the second operation mode, and the third operation mode are sequentially switched to control the internal temperature of the cultivation facility. The first operation mode is closed to separate the inside and outside of the cultivation facility and can be opened and closed. In the state of the window, the air conditioner is operated so that the internal temperature becomes a predetermined target temperature, and the second operation mode is to calculate the internal dew point temperature of the cultivation facility based on the internal temperature and the internal humidity, and the window is closed In the state, the air conditioner is operated so that the surface temperature of the fruit becomes higher than the internal dew point temperature, and the third operation mode is to stop the air conditioner with the window opened.

According to this structure, at night, with the windows closed, the air conditioner is activated so that the internal temperature of the cultivation facility becomes the predetermined target temperature. From before sunrise to after sunrise, with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility. In addition, when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the windows are opened after sunrise, since the internal temperature of the cultivation facility is close to the outside temperature of the cultivation facility, and the surface temperature of the fruit has become higher than the internal dew point temperature of the cultivation facility, it can be reliably prevented Condensation occurs on the surface of the device.

Furthermore, in the temperature control method described above, after a predetermined time has passed from the sunrise time, the second operation mode may be shifted to the third operation mode.

According to this structure, the air conditioner is operated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility when the window is closed until the predetermined time has passed from the sunrise time, and the time from the sunrise time After a predetermined time has elapsed, the air conditioner is stopped with the window opened. Therefore, by setting the predetermined time to the time when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, it is possible to reliably prevent condensation from occurring on the surface of the fruit.

Furthermore, in the above-mentioned temperature control method, when the internal temperature has reached the temperature which is the limit for the growth of the fruit, the second operation mode may be shifted to the third operation mode.

According to this structure, until the internal temperature reaches the limit temperature for the cultivation of fruits, with the windows closed, the air conditioner is activated so that the surface temperature of the fruits becomes higher than the internal dew point temperature of the cultivation facility. When the internal temperature has reached the temperature which is the limit for growing the fruit, the air conditioner is stopped with the window opened. Therefore, when the internal temperature of the cultivation facility has reached the limit temperature for the cultivation of fruits, the internal temperature of the cultivation facility has been close to the external temperature of the cultivation facility, or has exceeded the external temperature, even if the window is opened, it can still be prevented. Condensation occurs on the surface of the fruit.

Furthermore, in the above-mentioned temperature control method, the external temperature and external humidity of the cultivation facility can be obtained, and the external dew point temperature of the cultivation facility can be calculated based on the external temperature and the external humidity, and the surface temperature of the fruit becomes higher than When the external dew point temperature is higher, the second operation mode is shifted to the third operation mode.

According to this structure, when the surface temperature of the fruit is lower than the external dew point temperature of the cultivation facility, with the window closed, the air conditioner is activated to make the surface temperature of the fruit higher than the internal dew point temperature of the cultivation facility And when the surface temperature of the fruit becomes higher than the outside dew point temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the window is opened, since the surface temperature of the fruit has become higher than the external dew point temperature of the cultivation facility, it is possible to prevent condensation on the surface of the fruit.

Furthermore, in the temperature control method described above, in the second operation mode, the surface temperature of the fruit may be further obtained from a sensor that measures the surface temperature of the fruit.

According to this configuration, since the accurate surface temperature of the fruit can be obtained from the sensor that measures the surface temperature of the fruit, it is possible to more reliably prevent condensation on the surface of the fruit.

Furthermore, in the temperature control method described above, the surface temperature of the fruit may be further estimated in the second operation mode.

According to this configuration, since the surface temperature of the fruit can be estimated, a sensor for measuring the surface temperature of the fruit is not required, and the configuration can be simplified.

Furthermore, in the temperature control method described above, the estimated value may be extracted from a table, which is an estimated value of the surface temperature of the fruit, and the internal temperature of the cultivation facility at the point in time when the second operation mode is shifted to, Corresponding tables are created for the elapsed time from the point of shifting to the aforementioned second operation mode, and the aforementioned estimated value is the aforementioned internal temperature at the time of shifting to the aforementioned second operation mode, and from the point of shifting to the aforementioned second operation mode. A corresponding value is established for the elapsed time from the time point of the action mode.

According to this configuration, it is possible to easily estimate the surface temperature of the fruit based on the internal temperature at the time when the second operation mode is shifted and the elapsed time from the time when the second operation mode is shifted.

Furthermore, in the temperature control method described above, in the third operation mode, the window may be opened step by step at predetermined time intervals.

According to this configuration, since the windows are opened step by step at predetermined time intervals, the internal temperature of the cultivation facility can be gradually approached to the external temperature of the cultivation facility.

Another aspect of the temperature control device of the present disclosure is a temperature control device that controls the internal temperature of a fruit cultivation facility, and includes: an acquisition unit that obtains the internal temperature and internal humidity of the cultivation facility; and a control unit that sequentially switches the first The operation mode, the second operation mode, and the third operation mode are used to control the internal temperature of the cultivation facility. The first operation mode is in a state where the openable and closable windows separating the inside and the outside of the cultivation facility are closed , The air conditioner is operated so that the internal temperature becomes a predetermined target temperature, and the second operation mode is to calculate the internal dew point temperature of the cultivation facility based on the internal temperature and the internal humidity, and when the windows are closed, The air conditioner is operated so that the surface temperature of the fruit becomes higher than the internal dew point temperature, and the third operation mode is to stop the air conditioner with the window opened.

According to this structure, at night, with the windows closed, the air conditioner is activated so that the internal temperature of the cultivation facility becomes the predetermined target temperature. From before sunrise to after sunrise, with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility. In addition, when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the windows are opened after sunrise, since the internal temperature of the cultivation facility is close to the outside temperature of the cultivation facility, and the surface temperature of the fruit has become higher than the internal dew point temperature of the cultivation facility, it can be reliably prevented Condensation occurs on the surface of the device.

The temperature control program of other aspects of the present disclosure is a temperature control program for controlling the internal temperature of the fruit cultivation facility, which enables the computer to function to obtain the internal temperature and internal humidity of the aforementioned cultivation facility, and by sequentially switching the first 1 operation mode, second operation mode, and third operation mode to control the internal temperature of the cultivation facility. The first operation mode is a state where the openable and closable windows that separate the inside and outside of the cultivation facility are closed Next, the air conditioner is operated so that the internal temperature becomes a predetermined target temperature, and the second operation mode is to calculate the internal dew point temperature of the cultivation facility based on the internal temperature and the internal humidity, and when the windows are closed The air conditioner is operated so that the surface temperature of the fruit becomes higher than the internal dew point temperature, and the third operation mode is to stop the air conditioner with the window opened.

According to this structure, at night, with the windows closed, the air conditioner is activated so that the internal temperature of the cultivation facility becomes the predetermined target temperature. From before sunrise to after sunrise, with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility. In addition, when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the windows are opened after sunrise, since the internal temperature of the cultivation facility is close to the outside temperature of the cultivation facility, and the surface temperature of the fruit has become higher than the internal dew point temperature of the cultivation facility, it can be reliably prevented Condensation occurs on the surface of the device.

Another aspect of the temperature control system of the present disclosure is provided with: a temperature control device that controls the internal temperature of the fruit cultivation facility; an air conditioner; and windows, which separate the inside and outside of the cultivation facility and can be opened and closed, and the temperature control device includes : The obtaining unit obtains the internal temperature and internal humidity of the cultivation facility; and the control unit controls the internal temperature of the cultivation facility by sequentially switching the first operation mode, the second operation mode, and the third operation mode. 1 The operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature with the windows closed. The second operation mode is to calculate the inside of the cultivation facility based on the internal temperature and the internal humidity. Dew point temperature, and in a state where the window is closed, the air conditioner is operated so that the surface temperature of the fruit becomes higher than the internal dew point temperature. The third operation mode is in the state where the window is opened. Stop the aforementioned air conditioner.

According to this structure, at night, with the windows closed, the air conditioner is activated so that the internal temperature of the cultivation facility becomes the predetermined target temperature. From before sunrise to after sunrise, with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility. In addition, when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the windows are opened after sunrise, since the internal temperature of the cultivation facility is close to the outside temperature of the cultivation facility, and the surface temperature of the fruit has become higher than the internal dew point temperature of the cultivation facility, it can be reliably prevented Condensation occurs on the surface of the device.

Another aspect of the temperature control method of the present disclosure is a temperature control method in a temperature control device that controls the internal temperature of a fruit cultivation facility, which obtains the surface temperature of the fruit from a sensor that measures the surface temperature of the fruit, and borrows The internal temperature of the cultivation facility is controlled by sequentially switching the first operation mode, the second operation mode, and the third operation mode. The first operation mode separates the inside and the outside of the cultivation facility when it is closed and can be opened and closed. In the state of the window, the air conditioner is operated to make the internal temperature become the predetermined target temperature, and the second operation mode is to calculate the internal dew point temperature of the cultivation facility based on the internal temperature and the internal humidity, and the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity. In the state of the window, the air conditioner is operated so that the surface temperature of the fruit becomes higher than the internal dew point temperature, and the third operation mode is to stop the air conditioner with the window opened.

According to this structure, at night, with the windows closed, the air conditioner is activated so that the internal temperature of the cultivation facility becomes the predetermined target temperature. From before sunrise to after sunrise, with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility. In addition, when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the windows are opened after sunrise, since the internal temperature of the cultivation facility is close to the outside temperature of the cultivation facility, and the surface temperature of the fruit has become higher than the internal dew point temperature of the cultivation facility, it can be reliably prevented Condensation occurs on the surface of the device.

The temperature control device of another aspect of the present disclosure is a temperature control device that controls the internal temperature of a fruit cultivation facility, and includes: an acquisition unit that acquires the surface temperature of the fruit from a sensor that measures the surface temperature of the fruit; and a control unit , By sequentially switching the first operation mode, the second operation mode, and the third operation mode to control the internal temperature of the cultivation facility. The first operation mode is to separate the inside and outside of the cultivation facility when the In the state of the openable and closable window, the air conditioner is operated so that the internal temperature becomes a predetermined target temperature. The second operation mode is to calculate the internal dew point temperature of the cultivation facility based on the internal temperature and the internal humidity, and With the window closed, the air conditioner is operated so that the surface temperature of the fruit becomes higher than the internal dew point temperature, and the third operation mode is to stop the air conditioner with the window opened.

According to this structure, at night, with the windows closed, the air conditioner is activated so that the internal temperature of the cultivation facility becomes the predetermined target temperature. From before sunrise to after sunrise, with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility. In addition, when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the windows are opened after sunrise, since the internal temperature of the cultivation facility is close to the outside temperature of the cultivation facility, and the surface temperature of the fruit has become higher than the internal dew point temperature of the cultivation facility, it can be reliably prevented Condensation occurs on the surface of the device.

The temperature control program of another aspect of the present disclosure is a temperature control program for controlling the internal temperature of fruit cultivation facilities, which enables a computer to function to obtain the surface temperature of the fruit from a sensor that measures the surface temperature of the fruit , And by sequentially switching the first operation mode, the second operation mode, and the third operation mode to control the internal temperature of the cultivation facility. The first operation mode separates the inside and outside of the cultivation facility when it is closed. And in the state of the openable and closable window, the air conditioner is operated so that the internal temperature becomes a predetermined target temperature. The second operation mode is to calculate the internal dew point temperature of the cultivation facility based on the internal temperature and the internal humidity, and With the window closed, the air conditioner is operated so that the surface temperature of the fruit becomes higher than the internal dew point temperature, and the third operation mode is to stop the air conditioner with the window opened .

According to this structure, at night, with the windows closed, the air conditioner is activated so that the internal temperature of the cultivation facility becomes the predetermined target temperature. From before sunrise to after sunrise, with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility. In addition, when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the windows are opened after sunrise, since the internal temperature of the cultivation facility is close to the outside temperature of the cultivation facility, and the surface temperature of the fruit has become higher than the internal dew point temperature of the cultivation facility, it can be reliably prevented Condensation occurs on the surface of the device.

The temperature control system of another aspect of the present disclosure includes: a temperature control device that controls the internal temperature of the fruit cultivation facility; an air conditioner; a window that separates the inside and outside of the cultivation facility and can be opened and closed; and a sensor that measures For the surface temperature of the fruit, the temperature control device includes: an acquisition unit that acquires the surface temperature of the fruit from the sensor; and a control unit that sequentially switches the first operation mode, the second operation mode, and the third operation mode, To control the internal temperature of the cultivation facility, the first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature with the windows closed, and the second operation mode is based on the internal The temperature and the internal humidity are calculated to calculate the internal dew point temperature of the cultivation facility, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature. The third The operation mode is to stop the air conditioner in a state where the window has been opened.

According to this structure, at night, with the windows closed, the air conditioner is activated so that the internal temperature of the cultivation facility becomes the predetermined target temperature. From before sunrise to after sunrise, with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the internal dew point temperature of the cultivation facility. In addition, when the internal temperature of the cultivation facility is close to the external temperature of the cultivation facility, the air conditioner is stopped with the window opened. Therefore, when the windows are opened after sunrise, since the internal temperature of the cultivation facility is close to the outside temperature of the cultivation facility, and the surface temperature of the fruit has become higher than the internal dew point temperature of the cultivation facility, it can be reliably prevented Condensation occurs on the surface of the device.

Hereinafter, the embodiments of the present disclosure will be described with reference to the attached drawings. In addition, the following embodiments are only examples of the present disclosure, and are not intended to limit the technical scope of the present disclosure.

(Embodiment 1) Fig. 1 is an overall view showing the configuration of the cultivation system in the first embodiment of the present disclosure.

The cultivation facility 100 is a facility for cultivating the fruit 10 by separating it from the outside. Specifically, the cultivation facility 100 is a steel-frame greenhouse or a pipe-net greenhouse surrounded by polyolefin, polyvinyl chloride, fluorine-based film, or the like. The fruit 10 is, for example, a tomato fruit.

The cultivation system shown in Fig. 1 includes: a temperature control device 1, an internal temperature and humidity measuring device 11, a side window drive device 12, a ventilating fan 13, an air conditioner 14, a surface temperature measuring device 15, a sunroof drive device 17, a side window 121, and a sunroof 171.

The internal temperature and humidity measuring device 11 measures the internal temperature and internal humidity of the cultivation facility 100. The internal temperature and humidity measuring device 11 includes a temperature sensor 141 and a humidity sensor 142. The temperature sensor 141 measures the internal temperature of the cultivation facility 100. The humidity sensor 142 measures the internal humidity of the cultivation facility 100. The internal humidity is the relative humidity in the cultivation facility 100. The temperature sensor 141 and the humidity sensor 142 are installed in any place in the cultivation facility 100.

The temperature control device 1 controls the internal temperature of the cultivation facility 100 of the fruit 10. The temperature control device 1 determines the separation condition between the inside and the outside of the cultivation facility 100 and the change condition of the temperature and humidity in the cultivation facility 100 based on the data input from the internal temperature and humidity measurement device 11.

The air conditioner 14 changes the temperature and humidity in the cultivation facility 100 by, for example, a heat pump. The air conditioner 14 cools the inside of the cultivation facility 100 by the air-conditioning function, and warms the inside of the cultivation facility 100 by the heating function. When the air conditioner 14 is operating, the ventilating fan 13 is stopped and the side windows 121 and the sunroof 171 are closed in advance, so that the inside of the cultivation facility 100 can be cooled or warmed efficiently. Especially at night, the temperature control device 1 operates the air conditioner 14 in a state where the ventilating fan 13 is stopped and the side windows 121 and the sunroof 171 are closed.

In addition, the air-conditioning device 14 may be constituted by a plurality of air-conditioning element devices. For example, the air conditioner 14 may include a plurality of heat pumps. Among the plurality of heat pumps, some of the heat pumps may perform cooling operation, and the other heat pumps may perform heating operation. Thereby, the temperature and humidity in the cultivation facility 100 can be controlled accurately. In addition, the air conditioner 14 may be composed of a heat pump and a combustion type heater. The heating function of the air conditioner 14 can also be realized by operating a combustion type heater. In addition, the air-conditioning device 14 may include a dehumidifier as the air-conditioning element device.

The ventilating fan 13 is installed on the upper part of the side surface (generally, the surface in the short-side direction) of the cultivation facility 100, and forcibly exhausts the air in the cultivation facility 100 to the outside.

The temperature inside the cultivation facility 100 rises due to sunlight, and becomes higher than the temperature outside the cultivation facility 100. In particular, high-temperature air tends to accumulate in the upper part of the cultivation facility 100, and the ventilating fan 13 exhausts the high-temperature air to the outside, so that the temperature rise in the cultivation facility 100 can be suppressed. In addition, the cultivation system may not include the ventilation fan 13.

The side window 121 is openable and closable, and separates the inside of the cultivation facility 100 from the outside. The side window 121 is constituted by a coating film covering the side surface (surface in the longitudinal direction) of the cultivation facility 100. A straight pipe for rolling up the covering film is provided at the lower part of the covering film, and a side window 121 on the side surface of the cultivation facility 100 is opened and closed by rotating the straight pipe.

The skylight 171 is openable and closable, and separates the inside of the cultivation facility 100 from the outside. The skylight 171 is installed in the upper part of the cultivation facility 100.

When the side windows 121 and the skylight 171 are closed, the temperature inside the cultivation facility 100 rises due to the irradiation of sunlight, and becomes higher than the outside temperature of the cultivation facility 100. After that, when the side windows 121 and the skylight 171 have been opened, since outside air is introduced into the cultivation facility 100, the temperature rise in the cultivation facility 100 can be suppressed.

The side window driving device 12 follows the control signal from the temperature control device 1 to open and close the side window 121. The side window driving device 12 automatically opens and closes the side window 121 by rotating a straight pipe provided at the lower part of the side window 121. In addition, the side window 121 can also be opened and closed manually. In the case of manually opening and closing the side window 121, the side window driving device 12 is not required.

The sunroof driving device 17 follows the control signal from the temperature control device 1 to automatically open and close the sunroof 171. In addition, the sunroof 171 can also be opened and closed manually. In the case of manually opening and closing the sunroof 171, the sunroof driving device 17 is not required.

The temperature sensor 141 and the humidity sensor 142 send the measured data to the temperature control device 1. The temperature sensor 141 and the humidity sensor 142 may also transmit the voltage output corresponding to the temperature and humidity values through, for example, a cable. In addition, the temperature sensor 141 and the humidity sensor 142 can also communicate temperature and humidity through digital signals through a network such as a LAN (Local Area Network).

The surface temperature measuring device 15 is, for example, a radiation thermometer, and measures the surface temperature of the fruit. The surface temperature measuring device 15 measures the surface temperature of at least one fruit among a plurality of fruits in the cultivation facility 100. The surface temperature measuring device 15 transmits the measured surface temperature of the fruit to the temperature control device 1.

Hereinafter, a description will be given of a temperature control method in which the temperature in the cultivation facility 100 is lowered at night on the premise of fruit cultivation, and outside air is introduced into the cultivation facility 100 after sunrise.

In addition, as a cultivation area, a high temperature and high humidity area is a prerequisite. In this case, the outside air temperature at night is 26° C., the outside air humidity at night is, for example, 90%, the outside air temperature during the day is, for example, 32° C., and the outside air humidity during the day is, for example, 60%.

At night, the ventilating fan 13 is stopped, the side windows 121 and the sunroof 171 are closed, and the air conditioner 14 performs cooling operation. Here, in this embodiment, it is assumed that the internal temperature of the cultivation facility 100 is set to be about 5°C lower than the outside air temperature. At this time, the internal temperature of the cultivation facility 100 becomes 21 degreeC, for example.

In this situation, the air conditioner 14 is stopped at the same time as the sunrise, the ventilating fan 13 is activated, the side windows 121 and the skylight 171 are fully opened, and the outside air with a temperature of 26°C and a humidity of 90% is introduced into the cultivation facility 100 Since the temperature of the fruit is 21°C, the air around the fruit will be cooled to 21°C. Since the dew point temperature of the outside air with a temperature of 26°C and a humidity of 90% is about 24.2°C, the air temperature around the fruit becomes below the dew point temperature, and condensation occurs on the fruit.

Therefore, in order to prevent condensation on the fruit, when the outside air is introduced, the temperature of the fruit must be higher than the dew point temperature of the outside air.

Fig. 2 is a block diagram showing the structure of the temperature control device in the first embodiment of the present disclosure.

The temperature control device 1 shown in FIG. 2 includes a processor 101 and a memory 102.

The memory 102 is a storage device capable of storing various information, such as RAM (Random Access Memory), SSD (Solid State Drive), or flash memory.

The processor 101 is, for example, a CPU (Central Processing Unit), and includes an internal temperature and humidity acquisition unit 111, a fruit surface temperature acquisition unit 112, and a temperature control unit 113.

The internal temperature and humidity acquisition unit 111 acquires the internal temperature and internal humidity of the cultivation facility 100 measured by the internal temperature and humidity measurement device 11. The internal temperature and humidity obtaining unit 111 periodically obtains the internal temperature and internal humidity from the internal temperature and humidity measuring device 11 at predetermined time intervals.

The fruit surface temperature obtaining unit 112 obtains the fruit surface temperature measured by the surface temperature measuring device 15. The fruit surface temperature acquiring unit 112 periodically acquires the fruit surface temperature from the surface temperature measuring device 15 at predetermined time intervals.

The temperature control unit 113 controls the internal temperature of the cultivation facility 100 by sequentially switching the first operation mode, the second operation mode, and the third operation mode. Here, the first operation mode is to operate the air conditioner 14 so that the internal temperature becomes a predetermined target temperature in a state where the side windows 121 and the sunroof 171 that separate the inside and the outside of the cultivation facility 100 and can be opened and closed are closed. In the second operation mode, the internal dew point temperature of the cultivation facility 100 is calculated based on the internal temperature and internal humidity, and with the side windows 121 and skylights 171 closed, the air conditioner 14 is activated so that the surface temperature of the fruit 10 becomes higher than The internal dew point temperature is higher. The third operation mode is to stop the air conditioner 14 in a state where the side windows 121 and the sunroof 171 have been opened.

The temperature control unit 113 includes a first operation mode control unit 131, a second operation mode control unit 132, and a third operation mode control unit 133.

The first operation mode control unit 131 determines whether the current time is the start time of night cooling. The night air-conditioning start time is, for example, the sunset time. In addition, the first operation mode control unit 131 determines whether the current time is the start time of the dew condensation prevention process. The start time of the dew condensation prevention process is, for example, 3 hours before the sunrise time. If the sunrise time is 6 am, the start time of the dew condensation prevention treatment is 3 am. When the first operation mode control unit 131 has determined that the current time is the start time of night cooling and has determined that the current time is not the start time of the dew condensation prevention process, the side window 121 and the sunroof 171 are closed, and the air conditioner 14 Act to make the internal temperature become the predetermined target temperature.

The first operation mode control unit 131 outputs a control signal for closing the side window 121 to the side window driving device 12 and a control signal for closing the sunroof 171 to the sunroof driving device 17. In addition, the first operation mode control unit 131 operates the air conditioner 14 so that the internal temperature becomes a predetermined target temperature in a state where the side windows 121 and the sunroof 171 are closed. The predetermined target temperature is 21°C, for example. The first operation mode control unit 131 outputs a control signal to the air conditioner 14 so that the internal temperature acquired by the internal temperature and humidity acquisition unit 111 becomes a predetermined target temperature.

For example, when the internal temperature is higher than the predetermined target temperature and the air conditioner 14 is in the off state, the first operation mode control unit 131 outputs to the air conditioner 14 a control signal for changing the air conditioner 14 to the on state. In addition, when the internal temperature is higher than the predetermined target temperature and the air conditioner 14 is in the on state, the first operation mode control unit 131 does not output a control signal to the air conditioner 14. In addition, when the internal temperature is below the predetermined target temperature and the air conditioner 14 is in the off state, the first operation mode control unit 131 does not output a control signal to the air conditioner 14. In addition, when the internal temperature is below the predetermined target temperature and the air conditioner 14 is in the on state, the first operation mode control unit 131 outputs to the air conditioner 14 a control signal for changing the air conditioner 14 to the off state.

When it has been determined by the first operation mode control unit 131 that the current time is the start time of the dew condensation prevention process, the second operation mode control unit 132 calculates the internal dew point temperature of the cultivation facility 100 based on the internal temperature and internal humidity. With the side windows 121 and the sunroof 171 closed, the air conditioner 14 is operated so that the surface temperature of the fruit 10 becomes higher than the internal dew point temperature.

The second operation mode control unit 132 determines whether the current time is the end time of the dew condensation prevention process. The end time of the dew condensation prevention process is the time when sufficient time has passed from the sunrise time, for example, 8 o'clock in the morning. In addition, the memory 102 may store a predetermined dew condensation prevention processing end time.

In addition, the end time of the dew condensation prevention processing may be a time when a predetermined time has passed from the sunrise time. The second operation mode control unit 132 may transition from the second operation mode to the third operation mode after a predetermined time has passed from the sunrise time. The predetermined time is, for example, 2 hours. In addition, the end time of the dew condensation prevention treatment can also be changed according to the season. In addition, the end time of the dew condensation prevention treatment can also be determined in accordance with the type or size of the cultivated fruit. The time when the internal temperature of the cultivation facility 100 rises due to sunlight after sunrise and the fruit surface temperature becomes higher than the internal dew point temperature is set as the end time of the dew condensation prevention process. The temperature of the fruit increases with the internal temperature of the cultivation facility 100. Therefore, the predetermined time can also be obtained by estimation or experiment.

When the second operation mode control unit 132 has determined that the current time is not the end time of the dew condensation prevention process, it calculates the internal dew point temperature of the cultivation facility 100 based on the internal temperature and internal humidity, and when the side windows 121 and skylights 171 are closed Next, the air conditioner 14 is activated so that the surface temperature of the fruit 10 becomes higher than the internal dew point temperature.

The second operation mode control unit 132 calculates the internal dew point temperature of the cultivation facility 100 based on the internal temperature and internal humidity acquired by the internal temperature and humidity acquisition unit 111. The second operation mode control unit 132 calculates the internal dew point temperature based on the following formula (1).

Internal dew point temperature=237.3*log(internal water vapor pressure/6.11)/(7.5*log(10) +log(6.11/internal water vapor pressure))...(1)

In addition, the internal water vapor pressure is calculated based on the following equation (2).

Internal water vapor pressure=6.11*10^(7.5*internal temperature/(273.3+internal temperature)*internal humidity/100...(2)

The second operation mode control unit 132 operates the air conditioner 14 so that the surface temperature of the fruit 10 becomes higher than the internal dew point temperature in a state where the side windows 121 and the sunroof 171 are closed. That is, when the fruit surface temperature is higher than the internal dew point temperature and the air conditioner 14 is in the on state, the second operation mode control unit 132 outputs a control signal for changing the air conditioner 14 to the off state to the air conditioner 14 . In addition, when the fruit surface temperature is higher than the internal dew point temperature and the air conditioner 14 is in the off state, the second operation mode control unit 132 does not output a control signal to the air conditioner 14. Furthermore, when the fruit surface temperature is below the internal dew point temperature and the air conditioner 14 is in the off state, the second operation mode control unit 132 outputs to the air conditioner 14 a control signal for changing the air conditioner 14 to the on state. In addition, when the fruit surface temperature is below the internal dew point temperature and the air conditioner 14 is in the on state, the second operation mode control unit 132 does not output a control signal to the air conditioner 14.

In this manner, the second operation mode control unit 132 activates the air conditioner 14 to allow the fruit 10 to be activated while the side windows 121 and the sunroof 171 are closed during the period from the time when the condensation prevention process starts to the time when the condensation prevention process ends. The surface temperature becomes higher than the internal dew point temperature.

In a state where the side windows 121 and the sunroof 171 have been opened, the third operation mode control unit 133 stops the air conditioner 14. When the second operation mode control unit 132 has determined that the current time is the end time of the dew condensation prevention process, the third operation mode control unit 133 outputs a control signal for opening the side window 121 to the side window driving device 12, and controls The sunroof driving device 17 outputs a control signal for opening the sunroof 171. Furthermore, when the air conditioner 14 is in the on state, the third operation mode control unit 133 outputs to the air conditioner 14 a control signal for changing the air conditioner 14 to the on state. In addition, when the air conditioner 14 is in the off state, the third operation mode control unit 133 does not output a control signal to the air conditioner 14.

The third operation mode control unit 133 opens the side window 121 and the sunroof 171 step by step at predetermined time intervals. First, the third operation mode control unit 133 opens the side window 121 and the sunroof 171, for example, 30%. In addition, the third operation mode control unit 133 may open the side windows 121 and the sunroof 171 by 100% after a predetermined time has elapsed from the time when the side windows 121 and the sunroof 171 are opened.

Next, the temperature control process of the temperature control device 1 in the first embodiment of the present disclosure will be described.

FIG. 3 is a flowchart for explaining the temperature control process of the temperature control device 1 in the first embodiment of the present disclosure.

First, in step S1, the first operation mode control unit 131 determines whether the current time is the night cooling start time. Here, if it has been determined that the current time is not the night cooling start time (NO in step S1), the determination processing of step S1 is repeated until the current time becomes the night cooling start time.

On the other hand, when it has been determined that the current time is the night cooling start time (YES in step S1), the first operation mode control unit 131 determines whether the side windows 121 and the sunroof 171 are closed. In addition, the first operation mode control unit 131 may obtain from the side window driving device 12 and the sunroof driving device 17 which state the side window 121 and the sunroof 171 are in the open state and the closed state. In addition, the first operation mode control unit 131 may determine whether the side window 121 and the sunroof 171 are in the closed state based on the detection results of the sensors provided on the side window 121 and the sunroof 171.

Here, when it has been determined that the side window 121 and the sunroof 171 are in the closed state ("Yes" in step S2), the process proceeds to step S4.

On the other hand, when it has been determined that the side window 121 and the sunroof 171 are not in the closed state ("No" in step S2), in step S3, the first operation mode control unit 131 outputs the output signal to the side window driving device 12 A control signal for closing the side window 121 and a control signal for closing the sunroof 171 are output to the sunroof driving device 17. The side window driving device 12 closes the side window 121 after receiving the control signal from the first operation mode control unit 131. In addition, the sunroof driving device 17 closes the sunroof 171 after receiving the control signal from the first operation mode control unit 131.

Next, in step S4, the first operation mode control unit 131 determines whether the current time is the start time of the dew condensation prevention process. Here, when it has been determined that the current time is not the start time of the dew condensation prevention process (NO in step S4), in step S5, the internal temperature and humidity acquisition unit 111 acquires the internal temperature from the internal temperature and humidity measurement device 11.

Next, in step S6, the first operation mode control unit 131 determines whether the internal temperature is higher than a predetermined target temperature.

Here, when it has been determined that the internal temperature is higher than the predetermined target temperature (YES in step S6), in step S7, the first operation mode control unit 131 determines whether the air conditioner 14 is in the off state. Here, when it has been determined that the air conditioner 14 is not in the off state, that is, when it has been determined that the air conditioner 14 is in the on state (NO in step S7), the process returns to step S4.

On the other hand, when it has been determined that the air conditioner 14 is in the off state (YES in step S7), in step S8, the first operation mode control unit 131 outputs to the air conditioner 14 to use the air conditioner 14 Change to the control signal of the open state. The air conditioner 14 will change to the on state after obtaining the control signal. In addition, the air conditioner 14 performs a cooling operation so that the internal temperature becomes equal to or lower than a predetermined target temperature.

In addition, if it is determined in step S6 that the internal temperature is below the predetermined target temperature ("No" in step S6), in step S9, the first operation mode control unit 131 determines whether the air conditioner 14 is in the on state . Here, when it has been determined that the air-conditioning device 14 is not in the on state, that is, when it has been determined that the air-conditioning device 14 is in the off state (NO in step S9), the process returns to step S4.

On the other hand, when it has been determined that the air conditioner 14 is in the on state (YES in step S9), in step S10, the first operation mode control unit 131 outputs to the air conditioner 14 to use the air conditioner 14 Change to the control signal of the closed state. The air conditioner 14 changes to the off state after obtaining the control signal from the first operation mode control unit 131. In addition, the air conditioner 14 stops the cooling operation.

In addition, in step S5 to step S10, with the side windows 121 and sunroof 171 closed, the target temperature control process of operating the air conditioner 14 so that the internal temperature becomes the predetermined target temperature is the same as the process of the first operation mode. correspond.

In addition, if it has been determined in step S4 that the current time is the start time of the dew condensation prevention process ("Yes" in step S4), in step S11, the second operation mode control unit 132 performs operations for preventing condensation on the fruit The anti-condensation treatment. In addition, the dew condensation prevention process corresponds to the process in the second operation mode.

Here, the dew condensation prevention process in step S11 will be described.

Fig. 4 is a flowchart for explaining the dew condensation prevention process of step S11 in Fig. 3.

First, in step S21, the second operation mode control unit 132 determines whether the current time is the end time of the dew condensation prevention process. Here, when it has been determined that the current time is the end time of the dew condensation prevention process (YES in step S21), the process shifts to step S12 in FIG. 3.

On the other hand, when it has been determined that the current time is not the end time of the dew condensation prevention process ("No" in step S21), in step S22, the fruit surface temperature obtaining unit 112 obtains the fruit surface temperature from the surface temperature measuring device 15 .

Next, in step S23, the internal temperature and humidity acquisition unit 111 acquires the internal temperature and internal humidity from the internal temperature and humidity measurement device 11.

Next, in step S24, the second operation mode control unit 132 calculates the internal dew point temperature of the cultivation facility 100 based on the internal temperature and internal humidity acquired by the internal temperature and humidity acquisition unit 111.

Next, in step S25, the second operation mode control unit 132 determines whether the fruit surface temperature is higher than the internal dew point temperature+α. α is a temperature margin for preventing condensation, and is 0.5°C, for example. Here, when it has been determined that the fruit surface temperature is higher than the internal dew point temperature + α (YES in step S25), in step S26, the second operation mode control unit 132 determines whether the air conditioner 14 is on state.

Here, when it has been determined that the air conditioner 14 is not in the on state, that is, when it has been determined that the air conditioner 14 is in the off state (NO in step S26), the process returns to step S21.

On the other hand, when it has been determined that the air conditioner 14 is in the on state (YES in step S26), in step S27, the second operation mode control unit 132 outputs to the air conditioner 14 to use the air conditioner 14 Change to the control signal of the closed state. The air conditioner 14 will be changed to the off state after obtaining the control signal. In addition, the air conditioner 14 stops the cooling operation.

Also, if it has been determined in step S25 that the fruit surface temperature is equal to or lower than the internal dew point temperature + α (NO in step S25), in step S28, the second operation mode control unit 132 determines whether the air conditioner 14 is Disabled. Here, when it has been determined that the air-conditioning device 14 is not in the off state, that is, when it has been determined that the air-conditioning device 14 is in the on state (NO in step S28), the process returns to step S21.

In addition, when it is determined in step S28 that the air conditioner 14 is not in the off state, the second operation mode control unit 132 may perform error processing. In the error processing, the second operation mode control unit 132 may notify the user of the following message: Although the air conditioner 14 is in the on state and is performing cooling operation, the fruit surface temperature has not become higher than the internal dew point temperature.

On the other hand, when it has been determined that the air conditioner 14 is in the off state (YES in step S28), in step S29, the second operation mode control unit 132 outputs to the air conditioner 14 to use the air conditioner 14 Change to the control signal of the open state. The air conditioner 14 will change to the on state after obtaining the control signal. In addition, the air conditioner 14 performs cooling operation. When the air conditioner 14 is turned on and the cooling operation is performed, the internal humidity of the cultivation facility 100 will become low. As a result, the surface temperature of the fruit becomes higher than the internal dew point temperature.

In addition, in step S25, although the second operation mode control unit 132 is determining whether the fruit surface temperature is higher than the internal dew point temperature +α, the present disclosure is not particularly limited to this, and the second operation mode control unit 132 may be The fruit surface temperature is compared with the value obtained by adding the error temperature and the temperature margin α to the internal dew point temperature. The error temperature is, for example, 2°C.

Returning to FIG. 3, next, in step S12, the third operation mode control unit 133 performs window opening processing for opening the side window 121 and the sunroof 171. In addition, the windowing process corresponds to the process of the third operation mode.

Here, the windowing process of step S12 will be described.

FIG. 5 is a flowchart for explaining the windowing process of step S12 in FIG. 3.

First, in step S41, the third operation mode control unit 133 determines whether the air conditioner 14 is in the on state. Here, when it has been determined that the air conditioner 14 is not in the on state, that is, when it has been determined that the air conditioner 14 is in the off state (NO in step S41), the process proceeds to step S43.

On the other hand, when it has been determined that the air conditioner 14 is in the ON state (YES in step S41), in step S42, the third operation mode control unit 133 outputs to the air conditioner 14 to use the air conditioner 14 Change to the control signal of the closed state. The air conditioner 14 changes to the off state after obtaining the control signal from the third operation mode control unit 133. In addition, the air conditioner 14 stops the cooling operation.

Next, in step S43, the third operation mode control unit 133 outputs to the side window driving device 12 and the sunroof driving device 17 a control signal for opening the side window 121 and the sunroof 171 by 30%. The side window driving device 12 follows the control signal from the third operation mode control unit 133 to open the side window 121 by 30%. In addition, the sunroof driving device 17 follows the control signal from the third operation mode control unit 133 to open the sunroof 171 by 30%. In addition, the third operation mode control unit 133 stores the time when the side window 121 and the sunroof 171 are opened in the memory 102.

Next, in step S44, the third operation mode control unit 133 determines whether a predetermined time has passed since the time when the side window 121 and the sunroof 171 were opened. The predetermined time is, for example, 30 minutes. Here, if it has been determined that the predetermined time has not elapsed from the time when the side window 121 and the sunroof 171 are opened ("No" in step S44), the determination processing of step S44 is performed until the side window 121 and the sunroof are opened. The time at 171 has passed the predetermined time.

On the other hand, when it has been determined that the predetermined time has elapsed from the time when the side window 121 and the sunroof 171 are opened ("Yes" in step S44), in step S45, the third operation mode control unit 133 controls the side window The driving device 12 and the sunroof driving device 17 output control signals for opening the side windows 121 and the sunroof 171 by 100%. The side window driving device 12 follows the control signal from the third operation mode control unit 133 to open the side window 121 by 100%. In addition, the sunroof driving device 17 complies with the control signal from the third operation mode control unit 133 to open the sunroof 171 by 100%.

And, after the windowing process of step S12 in FIG. 3 is performed, the temperature control process ends.

After sunrise, sunlight enters the cultivation facility 100, and the internal temperature of the cultivation facility 100 rises. The temperature of the fruit increases with the internal temperature of the cultivation facility 100. Then, after a predetermined time has elapsed from the time of sunrise, the air conditioner 14 is stopped, the ventilating fan 13 is operated, and the side windows 121 and the skylight 171 are opened. At this time, since the air conditioner 14 is still operating after sunrise, the internal humidity can be kept low and the internal dew point temperature will also be low.

In this way, at night, with the side windows 121 and the sunroof 171 closed, the air conditioner 14 is operated so that the internal temperature of the cultivation facility 100 becomes a predetermined target temperature. From before sunrise to after sunrise, with the side windows 121 and the sunroof 171 closed, the air conditioner 14 is activated so that the surface temperature of the fruit 10 becomes higher than the internal dew point temperature of the cultivation facility 100. In addition, when the internal temperature of the cultivation facility 100 is close to the external temperature of the cultivation facility 100, the air conditioner 14 is stopped in a state where the side windows 121 and the skylight 171 have been opened. Therefore, when the side windows 121 and skylight 171 are opened after sunrise, the internal temperature of the cultivation facility 100 is close to the external temperature of the cultivation facility 100, and the surface temperature of the fruit 10 has become higher than the internal dew point temperature of the cultivation facility 100. Since it is high, it is possible to reliably prevent condensation on the surface of the fruit 10.

In addition, in the first embodiment, although the side windows 121 and the sunroof 171 are initially opened by 30%, the present disclosure is not particularly limited to this. Initially, the side window 121 and the sunroof 171 may be opened 50%, and the ratio of opening the side window 121 and the sunroof 171 is not particularly limited.

In addition, in the first embodiment, although the third operation mode control unit 133 opens the side windows 121 and the sunroof 171 in two stages, the present disclosure is not particularly limited to this, and the side windows may be opened in three or more stages. 121 and skylight 171.

In addition, when the cultivation system does not include the side window driving device 12, and the user manually opens the side window 121, the third operation mode control unit 133 may be connected to the display device or the temperature control device 1 The terminal device owned by the user displays a screen instructing to open the side window 121 by 30%. In addition, after a predetermined time has elapsed from the time when the side window 121 is opened, the third operation mode control unit 133 may display a screen instructing to open the side window 121 by 100% on the display device or the terminal device.

Similarly, in the case where the cultivation system does not have the sunroof driving device 17, and the user manually opens the sunroof 171, the third operation mode control unit 133 may be connected to the display device or the temperature control device 1 The terminal device owned by the user displays a screen instructing to open the skylight 171 by 30%. In addition, after a predetermined time has elapsed from the time when the sunroof 171 is opened, the third operation mode control unit 133 may display a screen instructing to open the sunroof 171 100% on the display device or the terminal device.

Next, a first modification of the first embodiment will be described. In the first embodiment described above, in the window opening process, the third operation mode control unit 133 opens the side windows 121 and the sunroof 171 step by step. However, in the first modification of the first embodiment, in the window opening process However, the third operation mode control unit 133 does not open the side windows 121 and the sunroof 171 step by step, but opens the side windows 121 and the sunroof 171 100% at a time.

Fig. 6 is a flowchart for explaining windowing processing in the first modification of the first embodiment of the present disclosure.

In addition, since the processing of step S51 and step S52 is the same as the processing of step S41 and step S42 shown in FIG. 5, the description is omitted.

Next, in step S53, the third operation mode control unit 133 outputs to the side window driving device 12 a control signal for fully opening the side window 121 and the sunroof 171. The side window driving device 12 fully opens the side window 121 in accordance with the control signal from the third operation mode control unit 133. In addition, the sunroof driving device 17 fully opens the sunroof 171 in accordance with the control signal from the third operation mode control unit 133.

In addition, when the cultivation system does not include the side window driving device 12, and the user manually opens the side window 121, the third operation mode control unit 133 may be connected to the display device or the temperature control device 1 A screen indicating that the side window 121 should be fully opened is displayed on the terminal device owned by the user.

Similarly, when the cultivation system does not have the sunroof driving device 17, but the user opens the sunroof 171 manually, the third operation mode control unit 133 may be connected to the display device or the user of the temperature control device 1. A screen instructing to fully open the sunroof 171 is displayed on the terminal device owned.

Next, a second modification of the first embodiment will be described. In the first embodiment described above, in step S21 of the dew condensation prevention process, the second operation mode control unit 132 judges whether the current time is the end time of the dew condensation prevention process, but in the second modification of the first embodiment, In the dew condensation prevention process, the second operation mode control unit 132 determines whether the internal temperature has reached the growth limit temperature, which is the limit for fruit growth.

That is, in the first embodiment described above, the temperature control via the air conditioner 14 is still performed after the sunrise time. However, after the sunrise time, due to sunlight, the internal temperature of the cultivation facility 100 will rise even if the temperature control via the air conditioner 14 is performed. Therefore, the second operation mode control unit 132 may shift from the second operation mode to the third operation mode when the internal temperature has reached the cultivation limit temperature, which is the limit for the cultivation of fruits. The cultivation limit temperature is the limit temperature of the cultivation of the fruit that is the cultivation object, and is, for example, 30°C.

FIG. 7 is a flowchart for explaining the dew condensation prevention process in the second modification of the first embodiment of the present disclosure.

First, in step S71, the internal temperature and humidity obtaining unit 111 obtains the internal temperature from the internal temperature and humidity measuring device 11.

Next, in step S72, the second operation mode control unit 132 determines whether the internal temperature has reached the growth limit temperature, which is the limit for fruit growth. Here, when it has been determined that the internal temperature has reached the incubation limit temperature (YES in step S72), the process shifts to step S12 in FIG. 3.

On the other hand, when it has been determined that the internal temperature has not reached the growth limit temperature ("No" in step S72), in step S73, the fruit surface temperature acquiring unit 112 acquires the fruit surface temperature from the surface temperature measuring device 15 .

In addition, since the process of step S73-step S80 is the same as the process of step S22-step S29 shown in FIG. 4, description is abbreviate|omitted.

(Embodiment 2) In the first embodiment described above, the second operation mode control unit 132 transitions from the second operation mode to the third operation mode when the current time is the end time of the condensation prevention process. However, in the second embodiment, the second operation mode The mode control unit calculates the external dew point temperature of the cultivation facility 100 based on the external temperature and external humidity of the cultivation facility 100, and when the surface temperature of the fruit has become higher than the external dew point temperature, shifts from the second operation mode to the second operation mode 3 action mode.

Fig. 8 is an overall view showing the configuration of the cultivation system in the second embodiment of the present disclosure.

The cultivation system shown in FIG. 8 includes: a temperature control device 1A, an internal temperature and humidity measuring device 11, a side window drive device 12, a ventilation fan 13, an air conditioner 14, a surface temperature measurement device 15, a sunroof drive device 17, a side window 121, and a sunroof 171 and external temperature and humidity measuring device 16. In addition, in the second embodiment, the same reference numerals are attached to the same configurations as those in the first embodiment, and the description is omitted.

The external temperature and humidity measuring device 16 measures the external temperature and external humidity of the cultivation facility 100. The external temperature and humidity measuring device 16 includes a temperature sensor 161 and a humidity sensor 162. The temperature sensor 161 measures the outside temperature of the cultivation facility 100. The humidity sensor 162 measures the external humidity of the cultivation facility 100. The external humidity is the relative humidity outside the cultivation facility 100. The temperature sensor 161 and the humidity sensor 162 are installed in any place outside the cultivation facility 100.

Fig. 9 is a block diagram showing the structure of the temperature control device in the second embodiment of the present disclosure.

The temperature control device 1A shown in FIG. 9 includes a processor 101A and a memory 102.

The processor 101A is, for example, a CPU, and includes an internal temperature and humidity acquisition unit 111, a fruit surface temperature acquisition unit 112, a temperature control unit 113A, and an external temperature and humidity acquisition unit 114.

The external temperature and humidity acquisition unit 114 acquires the external temperature and external humidity of the cultivation facility 100 measured by the external temperature and humidity measuring device 16. The external temperature and humidity acquisition unit 114 periodically acquires the external temperature and external humidity from the external temperature and humidity measuring device 16 at predetermined time intervals.

The temperature control unit 113A includes a first operation mode control unit 131, a second operation mode control unit 132A, and a third operation mode control unit 133.

The second operation mode control unit 132A calculates the external dew point temperature of the cultivation facility 100 based on the external temperature and external humidity. The second operation mode control unit 132A shifts from the second operation mode to the third operation mode when the surface temperature of the fruit has become higher than the external dew point temperature.

The second operation mode control unit 132A calculates the external dew point temperature based on the following formula (3).

External dew point temperature=237.3*log(external water vapor pressure/6.11)/(7.5*log(10) +log(6.11/external water vapor pressure)...(3)

In addition, the external water vapor pressure is calculated based on the following equation (4).

External water vapor pressure=6.11*10^(7.5*external temperature/(273.3+external temperature))*(external humidity/100...(4)

When the surface temperature of the fruit is below the external dew point temperature, the second operation mode control unit 132A activates the air conditioner 14 so that the surface temperature of the fruit 10 becomes higher than the internal dew point with the side windows 121 and sunroof 171 closed. The temperature is higher. In addition, when the fruit surface temperature is higher than the external dew point temperature, the second operation mode control unit 132A shifts from the dew condensation prevention process of the second operation mode control unit 132A to the window opening process of the third operation mode control unit 133.

The other functions of the second operation mode control unit 132A are the same as those of the second operation mode control unit 132 of the first embodiment.

Next, the temperature control process of the temperature control device 1A in the second embodiment of the present disclosure will be described. In addition, the temperature control process of the temperature control device 1A in the second embodiment is different from the temperature control process of the temperature control device 1 in the first embodiment only in the dew condensation prevention process. Therefore, in the following description, only the dew condensation prevention process in Embodiment 2 will be described.

Fig. 10 is a flowchart for explaining the dew condensation prevention process in the second embodiment of the present disclosure.

First, in step S91, the fruit surface temperature acquiring unit 112 acquires the fruit surface temperature from the surface temperature measuring device 15.

Next, in step S92, the external temperature and humidity acquisition unit 114 acquires the external temperature and external humidity from the external temperature and humidity measurement device 16.

Next, in step S93, the second operation mode control unit 132A calculates the external dew point temperature of the cultivation facility 100 based on the external temperature and external humidity acquired by the external temperature and humidity acquisition unit 114.

Next, in step S94, the second operation mode control unit 132A determines whether the fruit surface temperature is higher than the external dew point temperature. Here, when it has been determined that the fruit surface temperature is higher than the external dew point temperature (YES in step S94), the process shifts to step S12 in FIG. 3.

On the other hand, when it has been determined that the fruit surface temperature is equal to or lower than the external dew point temperature (NO in step S94), in step S95, the fruit surface temperature obtaining unit 112 obtains the fruit surface temperature from the surface temperature measuring device 15.

In addition, since the process of step S95-step S102 is the same as the process of step S22-step S29 shown in FIG. 4, description is abbreviate|omitted.

In addition, in step S98, the second operation mode control unit 132A may determine whether the fruit surface temperature acquired in step S91 is higher than the internal dew point temperature+α. In this case, in step S95, the fruit surface temperature obtaining unit 112 may not obtain the fruit surface temperature from the surface temperature measuring device 15.

In addition, in step S94, although the second operation mode control unit 132A is determining whether the fruit surface temperature is higher than the external dew point temperature, the present disclosure is not particularly limited to this, and the second operation mode control unit 132A may also determine whether the fruit surface temperature is higher than the external dew point temperature. The surface temperature is compared with the value obtained by adding the error temperature to the external dew point temperature. The error temperature is, for example, 2°C.

In addition, the temperature control device 1A in the second embodiment can also be applied to the first modification and the second modification of the above-mentioned first embodiment.

(Embodiment 3) In the first embodiment described above, the cultivation system includes the surface temperature measuring device 15, and the fruit surface temperature obtaining unit 112 obtains the fruit surface temperature measured by the surface temperature measuring device 15. However, in the third embodiment, the cultivation system The surface temperature measuring device 15 is not provided, and the fruit surface temperature is estimated by the temperature control device 1B.

Fig. 11 is an overall view showing the structure of the cultivation system in the third embodiment of the present disclosure, and Fig. 12 is a block diagram showing the structure of the temperature control device in the third embodiment of the present disclosure.

The cultivation system shown in FIG. 11 includes a temperature control device 1B, an internal temperature and humidity measuring device 11, a side window drive device 12, a ventilation fan 13, an air conditioner 14, a sunroof drive device 17, a side window 121, and a sunroof 171. In addition, in the third embodiment, the same reference numerals are attached to the same configurations as those in the first embodiment, and the description is omitted.

The cultivation system of the third embodiment is different from the cultivation system of the first embodiment in that the surface temperature measuring device 15 is not provided.

The temperature control device 1B shown in FIG. 12 includes a processor 101B and a memory 102B.

The processor 101B is, for example, a CPU, and includes an internal temperature and humidity acquisition unit 111, a temperature control unit 113B, and a fruit surface temperature estimation unit 115.

The memory 102B stores the surface temperature estimation table. The aforementioned surface temperature estimation table is the estimated value of the surface temperature of the fruit, and the internal temperature of the cultivation facility 100 at the point in time when the dew condensation prevention treatment (the second operation mode) has been transferred. A corresponding table is created for the elapsed time from the point of transition to the dew condensation prevention process (the second operation mode).

FIG. 13 is a diagram showing an example of the surface temperature estimation table stored in the memory in the third embodiment of the present disclosure.

The surface temperature estimation table associates the estimated value of the fruit surface temperature with the internal temperature of the cultivation facility 100 at the time when the dew condensation prevention treatment is transferred, and the elapsed time from the time when the dew condensation prevention treatment is transferred.

In FIG. 13, the upper column indicates the internal temperature of the cultivation facility 100 at the time when the dew condensation prevention treatment is transferred, and the left row indicates the elapsed time from the time when the dew condensation prevention treatment is transferred. For example, when the internal temperature of the cultivation facility 100 at the time of the dew condensation prevention treatment transition is 18°C, and the elapsed time from the dew condensation prevention treatment transition time is 1 hour, the estimated value of the fruit surface temperature is 20°C.

In addition, the memory 102B stores the internal temperature of the cultivation facility 100 at the time when the dew condensation prevention process (the second operation mode) has been transferred.

The fruit surface temperature estimation unit 115 estimates the surface temperature of the fruit. The fruit surface temperature estimating unit 115 extracts the estimated value from the surface temperature estimation table stored in the memory 102B. The estimated value is the internal temperature at the time when the dew condensation prevention process (the second operation mode) has been transferred, and the internal temperature has shifted from Corresponding values are established for the elapsed time from the time of condensation processing (the second operation mode).

The temperature control unit 113B includes a first operation mode control unit 131, a second operation mode control unit 132B, and a third operation mode control unit 133.

The second operation mode control unit 132B activates the air conditioner 14 in a state where the side windows 121 and the sunroof 171 are closed so that the estimated value of the surface temperature of the fruit 10 becomes higher than the internal dew point temperature. That is, when the estimated value of the fruit surface temperature estimated by the fruit surface temperature estimating unit 115 is higher than the internal dew point temperature and the air conditioner 14 is in the on state, the second operation mode control unit 132B responds to the air conditioner 14 A control signal for changing the air conditioner 14 to the off state is output. In addition, when the estimated value of the fruit surface temperature is higher than the internal dew point temperature and the air conditioner 14 is in the off state, the second operation mode control unit 132B does not output a control signal to the air conditioner 14. In addition, when the estimated value of the fruit surface temperature is lower than the internal dew point temperature and the air conditioner 14 is in the off state, the second operation mode control unit 132B outputs to the air conditioner 14 control for changing the air conditioner 14 to the on state Signal. In addition, when the estimated value of the fruit surface temperature is equal to or lower than the internal dew point temperature and the air conditioner 14 is in the on state, the second operation mode control unit 132B does not output a control signal to the air conditioner 14.

The other functions of the second operation mode control unit 132B are the same as those of the second operation mode control unit 132 of the first embodiment.

Next, the temperature control process of the temperature control device 1B in the third embodiment of the present disclosure will be described. In addition, the temperature control process of the temperature control device 1B in the third embodiment is different from the temperature control process of the temperature control device 1 in the first embodiment only in the dew condensation prevention process. Therefore, in the following description, only the dew condensation prevention process in Embodiment 3 will be described.

Fig. 14 is a flowchart for explaining the dew condensation prevention process in the third embodiment of the present disclosure.

First, in step S111, the internal temperature and humidity obtaining unit 111 obtains the internal temperature from the internal temperature and humidity measuring device 11.

Next, in step S112, the internal temperature and humidity acquisition unit 111 stores the acquired internal temperature in the memory 102B as the internal temperature at the transition time of the dew condensation prevention process.

Next, in step S113, the second operation mode control unit 132B determines whether the current time is the end time of the dew condensation prevention process. Here, when it has been determined that the current time is the end time of the dew condensation prevention process (YES in step S113), the process shifts to step S12 in FIG. 3.

On the other hand, when it has been determined that the current time is not the end time of the dew condensation prevention process (NO in step S113), in step S114, the fruit surface temperature estimating unit 115 estimates the fruit surface temperature. The fruit surface temperature estimating unit 115 extracts the estimated value of the fruit surface temperature from the surface temperature estimation table stored in the memory 102B. The estimated value is the internal temperature at the time point of the dew condensation prevention treatment transition and the elapsed since the time point of the dew condensation prevention treatment transition time. Time establishes a corresponding value.

In addition, since the processing of step S115 and step S116 is the same as the processing of step S23 and step S24 shown in FIG. 4, the description is omitted.

Next, in step S117, the second operation mode control unit 132B determines whether the estimated value of the fruit surface temperature is higher than the internal dew point temperature+α. α is a temperature margin for preventing condensation, and is 0.5°C, for example. Here, when it has been determined that the estimated value of the fruit surface temperature is higher than the internal dew point temperature + α (YES in step S117), in step S118, the second operation mode control unit 132B determines that the air conditioner 14 Whether it is on.

In addition, since the processing of step S118 and step S119 is the same as the processing of step S26 and step S27 shown in FIG. 4, the description is omitted.

In addition, when it has been determined in step S117 that the estimated value of the fruit surface temperature is equal to or less than the internal dew point temperature + α (NO in step S117), in step S120, the second operation mode control unit 132B determines that the air conditioner 14 Is it closed?

In addition, since the processing of step S120 and step S121 is the same as the processing of step S28 and step S29 shown in FIG. 4, the description is omitted.

In addition, when it is determined in step S120 that the air conditioner 14 is not in the off state, the second operation mode control unit 132B may perform error processing. In the error processing, the second operation mode control unit 132B may also notify the user of the following message: Although the air conditioner 14 is in the on state and is performing cooling operation, the fruit surface temperature has not become higher than the internal dew point temperature.

Furthermore, in step S117, although the second operation mode control unit 132B is determining whether the estimated value of the fruit surface temperature is higher than the internal dew point temperature +α, the present disclosure is not particularly limited to this. The second operation mode control unit 132B can also compare the estimated value of the fruit surface temperature with the value obtained by adding the error temperature and the temperature margin α to the internal dew point temperature. The error temperature is, for example, 2°C.

In addition, the temperature control device 1B in the third embodiment can also be applied to the first modification and the second modification of the above-mentioned first embodiment. In addition, the cultivation system in the third embodiment can also be applied to the second embodiment described above.

In the above-mentioned Embodiments 1 to 3, focusing on the temperature control method for preventing condensation on the fruit surface when switching from cold air at night to introducing outside air during the day in a hot and humid area.

However, even in areas other than high-temperature and high-humidity areas, when the temperature and humidity around the fruit will change during cultivation, the temperature control devices of the first to third embodiments can also control the temperature to control the surface of the fruit. The temperature becomes higher than the internal dew point temperature of the cultivation facility 100, and the condensation on the surface of the fruit is prevented.

In addition, in the present Embodiments 1 to 3, although the cultivation system includes the side window 121 and the skylight 171, the present disclosure is not particularly limited to this, and only one of the side window 121 and the skylight 171 may be provided.

In addition, in each of the above-mentioned embodiments, each constituent element may be constituted by dedicated hardware, or it may be realized by executing a software program suitable for each constituent element. Each constituent element can also be realized by allowing a program execution unit such as a CPU or a processor to read and execute a software program that has been recorded on a recording medium such as a hard disk or semiconductor memory.

Part or all of the functions of the device of the embodiment of the present disclosure are typically realized as an integrated circuit, that is, an LSI (Large Scale Integration). These may be made into a single chip individually, or may be made into a single chip including a part or all of them. In addition, the integration of circuits is not limited to LSI, and it can also be realized by a dedicated circuit or a general-purpose processor. It is also possible to use FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can rebuild the connection or setting of the circuit cell inside the LSI (ReConfigurable Processor).

In addition, part or all of the functions of the device of the embodiment of the present disclosure may be realized by a processor such as a CPU executing a program.

In addition, the numbers used above are all exemplified numbers for the concrete explanation of the present disclosure, and the present disclosure is not limited by the exemplified numbers.

In addition, the order in which each step shown in the above-mentioned flowchart is executed is an exemplified order in order to specifically explain the present disclosure, and it may be an order other than the above as long as the same effect can be obtained. In addition, part of the above-mentioned steps may be executed simultaneously (in parallel) with other steps.

Industrial availability Since the technique of the present disclosure can reliably prevent condensation on the surface of the fruit, it is useful as a technique for controlling the internal temperature of a fruit cultivation facility.

1, 1A, 1B: temperature control device 10: Fruit 11: Internal temperature and humidity measuring device 12: Side window drive device 13: Ventilation fan 14: Air conditioner 15: Surface temperature measuring device 16: External temperature and humidity measuring device 17: Sunroof drive device 100: Cultivation facilities 101, 101A, 101B: processor 102, 102B: memory 111: Internal temperature and humidity acquisition department 112: Fruit surface temperature acquisition section 113: Temperature Control Department 113A, 113B: temperature control unit 114: External temperature and humidity acquisition section 115: Fruit surface temperature estimation section 121: side window 131: The first operation mode control unit 132, 132A, 132B: 2nd operation mode control unit 133: 3rd operation mode control unit 141,161: temperature sensor 142,162: Humidity sensor 171: Skylight S1~S12, S21~S29, S41~S45, S51~S53, S71~S80, S91~S102, S111~S121: steps

Fig. 1 is an overall view showing the configuration of the cultivation system in the first embodiment of the present disclosure. Fig. 2 is a block diagram showing the structure of the temperature control device in the first embodiment of the present disclosure. FIG. 3 is a flowchart for explaining the temperature control process of the temperature control device 1 in the first embodiment of the present disclosure. Fig. 4 is a flowchart for explaining the dew condensation prevention process of step S11 in Fig. 3. FIG. 5 is a flowchart for explaining the windowing process of step S12 in FIG. 3. Fig. 6 is a flowchart for explaining windowing processing in the first modification of the first embodiment of the present disclosure. FIG. 7 is a flowchart for explaining the dew condensation prevention process in the second modification of the first embodiment of the present disclosure. Fig. 8 is an overall view showing the configuration of the cultivation system in the second embodiment of the present disclosure. Fig. 9 is a block diagram showing the structure of the temperature control device in the second embodiment of the present disclosure. Fig. 10 is a flowchart for explaining the dew condensation prevention process in the second embodiment of the present disclosure. Fig. 11 is an overall view showing the configuration of the cultivation system in the third embodiment of the present disclosure. Fig. 12 is a block diagram showing the structure of the temperature control device in the third embodiment of the present disclosure. FIG. 13 is a diagram showing an example of the surface temperature estimation table stored in the memory in the third embodiment of the present disclosure. Fig. 14 is a flowchart for explaining the dew condensation prevention process in the third embodiment of the present disclosure.

1: Temperature control device

10: Fruit

11: Internal temperature and humidity measuring device

12: Side window drive device

13: Ventilation fan

14: Air conditioner

15: Surface temperature measuring device

17: Sunroof drive device

100: Cultivation facilities

121: side window

141: temperature sensor

142: Humidity Sensor

171: Skylight

Claims (15)

A temperature control method is a temperature control method in a temperature control device that controls the internal temperature of a fruit cultivation facility, It obtains the internal temperature and internal humidity of the aforementioned cultivation facility, And by sequentially switching the first operation mode, the second operation mode, and the third operation mode to control the internal temperature of the cultivation facility, The first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature in a state where the openable and closable window separating the inside and the outside of the cultivation facility has been closed. In the second operation mode, the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the aforementioned temperature. The internal dew point temperature is higher, The third operation mode is to stop the air conditioner in a state where the window has been opened. Such as the temperature control method of claim 1, which shifts from the second operation mode to the third operation mode after a predetermined time has elapsed from the sunrise time. According to the temperature control method of claim 1, when the internal temperature has reached the temperature which is the limit for the growth of the fruit, the second operation mode is shifted to the third operation mode. Such as the temperature control method of claim 1, which further obtains the external temperature and external humidity of the aforementioned cultivation facility, The external dew point temperature of the cultivation facility is calculated based on the external temperature and the external humidity. When the surface temperature of the fruit becomes higher than the external dew point temperature, the second operation mode is shifted to the third operation model. According to the temperature control method of any one of claims 1 to 4, in the second operation mode, the surface temperature of the fruit is further obtained from a sensor that measures the surface temperature of the fruit. According to the temperature control method of any one of claims 1 to 4, in the second operation mode, the surface temperature of the fruit is further estimated. For example, the temperature control method of claim 6, which extracts the estimated value from the table, the table is the estimated value of the surface temperature of the fruit, and the internal temperature of the cultivation facility at the point in time when the second operation mode has been transferred, from A corresponding table is created for the elapsed time counted from the point of transition to the aforementioned second operation mode, and the aforementioned estimated value is the aforementioned internal temperature at the time point of transition to the aforementioned second operation mode, from the transition to the aforementioned second operation The elapsed time from the time point of the pattern establishes a corresponding value. Such as the temperature control method of any one of claims 1 to 4, which in the aforementioned third operation mode, opens the aforementioned window step by step at predetermined time intervals. A temperature control device that controls the internal temperature of fruit cultivation facilities, and is provided with: The acquisition department acquires the internal temperature and internal humidity of the aforementioned cultivation facilities; and The control unit controls the internal temperature of the cultivation facility by sequentially switching the first operation mode, the second operation mode, and the third operation mode, The first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature in a state where the openable and closable window separating the inside and the outside of the cultivation facility has been closed. In the second operation mode, the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the aforementioned temperature. The internal dew point temperature is higher, The third operation mode is to stop the air conditioner in a state where the window has been opened. A temperature control program used to control the internal temperature of fruit cultivation facilities, It enables the computer to function to obtain the internal temperature and internal humidity of the aforementioned cultivation facility, And by sequentially switching the first operation mode, the second operation mode, and the third operation mode to control the internal temperature of the cultivation facility, The first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature in a state where the openable and closable window separating the inside and the outside of the cultivation facility has been closed. In the second operation mode, the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the aforementioned temperature. The internal dew point temperature is higher, The third operation mode is to stop the air conditioner in a state where the window has been opened. A temperature control system with: Temperature control device to control the internal temperature of fruit cultivation facilities; Air-conditioning machinery; and The window separates the inside and outside of the aforementioned cultivation facility and can be opened and closed, The aforementioned temperature control device has: The acquisition department acquires the internal temperature and internal humidity of the aforementioned cultivation facilities; and The control unit controls the internal temperature of the cultivation facility by sequentially switching the first operation mode, the second operation mode, and the third operation mode, The first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature with the window closed. In the second operation mode, the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the aforementioned temperature. The internal dew point temperature is higher, The third operation mode is to stop the air conditioner in a state where the window has been opened. A temperature control method is a temperature control method in a temperature control device that controls the internal temperature of a fruit cultivation facility, It obtains the surface temperature of the fruit from a sensor that measures the surface temperature of the fruit, And by sequentially switching the first operation mode, the second operation mode, and the third operation mode to control the internal temperature of the cultivation facility, The first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature in a state where the openable and closable window separating the inside and the outside of the cultivation facility has been closed. In the second operation mode, the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the aforementioned temperature. The internal dew point temperature is higher, The third operation mode is to stop the air conditioner in a state where the window has been opened. A temperature control device that controls the internal temperature of fruit cultivation facilities, and is provided with: An acquiring unit, acquiring the surface temperature of the fruit from a sensor that measures the surface temperature of the fruit; and The control unit controls the internal temperature of the cultivation facility by sequentially switching the first operation mode, the second operation mode, and the third operation mode, The first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature in a state where the openable and closable window separating the inside and the outside of the cultivation facility has been closed. In the second operation mode, the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the aforementioned temperature. The internal dew point temperature is higher, The third operation mode is to stop the air conditioner in a state where the window has been opened. A temperature control program used to control the internal temperature of fruit cultivation facilities, It enables the computer to function to obtain the surface temperature of the fruit from a sensor that measures the surface temperature of the fruit, And by sequentially switching the first operation mode, the second operation mode, and the third operation mode to control the internal temperature of the cultivation facility, The first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature in a state where the openable and closable window separating the inside and the outside of the cultivation facility has been closed. In the second operation mode, the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the aforementioned temperature. The internal dew point temperature is higher, The third operation mode is to stop the air conditioner in a state where the window has been opened. A temperature control system with: Temperature control device to control the internal temperature of fruit cultivation facilities; Air conditioning machine The window separates the inside and outside of the aforementioned cultivation facility and can be opened and closed; and The sensor measures the surface temperature of the aforementioned fruit, The aforementioned temperature control device has: An obtaining part, obtaining the surface temperature of the fruit from the sensor; and The control unit controls the internal temperature of the cultivation facility by sequentially switching the first operation mode, the second operation mode, and the third operation mode, The first operation mode is to operate the air conditioner so that the internal temperature becomes a predetermined target temperature with the window closed. In the second operation mode, the internal dew point temperature of the cultivation facility is calculated based on the internal temperature and the internal humidity, and with the windows closed, the air conditioner is activated so that the surface temperature of the fruit becomes higher than the aforementioned temperature. The internal dew point temperature is higher, The third operation mode is to stop the air conditioner in a state where the window has been opened.

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