Air temperature control system

Abstract

To provide an air temperature control system for controlling the air temperature in a horticultural facility by using a control condition changing with time.SOLUTION: The air temperature control system includes an air thermometer 8 for measuring the internal air temperature of the gardening facility, a heating control part 53 for controlling the heating operation of the heater 3, and a window control part 54 for controlling the window opening adjusting operation of a window opening operation device 4 for operating the window. The heating control unit 53 refers to the heating control reference temperature line 61 in units of time, and instructs the heating operation when the measured internal temperature is lower than the heating control reference temperature line 61. The window control unit 54 refers to the window opening control reference temperature line 62 in units of time, and instructs the window opening adjusting operation when the measured internal temperature exceeds the window opening control reference temperature line 62. The window opening control reference temperature line 62 indicates a higher temperature than the heating control reference temperature line 61 over the entire time range.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a climate control system for a horticultural facility equipped with windows. [Background technology]

[0002] The temperature adjustment system (temperature adjustment system) disclosed in Patent Document 1 fully opens the horizontal curtains of an agricultural greenhouse at the time indicating sunrise and fully closes the horizontal curtains at the time of sunset. Between sunrise and sunset, the temperature range between the maximum and minimum temperatures allowable for plant cultivation is divided into multiple temperature zones. Depending on the temperature zone within which the temperature of the agricultural greenhouse falls, window control is performed, such as opening the skylights, operating the skylight fans, fully opening the inner curtains, partially opening the outer curtains, fully opening the outer curtains, partially opening the horizontal curtains, or fully opening the horizontal curtains. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-062928 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, temperature adjustment control between sunrise and sunset is performed under the same control conditions (control contents assigned to the divided temperature zones) regardless of the time between sunrise and sunset. Therefore, temperature adjustment control is performed under the same control conditions even in time zones with different change characteristics of weather conditions, such as early morning, daytime, and evening, which may result in delays in temperature adjustment and deviations from the target value.

[0005] An object of the present invention is to provide a temperature control system in which the temperature in a horticultural facility is controlled using control conditions that change with time of day. [Means for solving the problem]

[0006] The air temperature control system for a horticultural facility equipped with a window according to the present invention comprises a thermometer for measuring the air temperature inside the horticultural facility, a heater for supplying thermal energy to the interior space of the horticultural facility, a heating control unit for controlling the heating operation of the heater, a window opening operation device for operating the window opening degree of the window, and a window control unit for controlling the window opening adjustment operation of the window opening operation device, The heating control unit refers to a heating control reference temperature line set in units of time, and when the measured internal temperature measured by the thermometer falls below the heating control reference temperature line, it commands the heater to perform the heating operation, and the window control unit refers to a window opening control reference temperature line set in units of time, and when the measured internal temperature exceeds the window opening control reference temperature line, it commands the window opening operation device to adjust the window opening, and the window opening control reference temperature line indicates a temperature higher than the heating control reference temperature line over the entire time range.

[0007] With this configuration, the heating control reference temperature line and the window opening control reference temperature line, which are composed of control reference temperature values ​​set for each time period, are used as the control conditions for heating control and window opening control throughout all time zones subject to heating control and window opening control. Specifically, the heating control reference temperature value of the heating control reference temperature line at the current time is used as the control condition for heating control, and the window opening control reference temperature value of the window opening control reference temperature line at the current time is used as the control condition for window opening control. Furthermore, because the window opening control reference temperature line indicates temperatures higher than the heating control reference temperature line over the entire time range, control conditions can be appropriately set for each time period, such as first raising the internal temperature by heating the heater 3 when the internal temperature is low at sunrise, and then stopping heating and further lowering the internal temperature by opening the window when the internal temperature rises due to increased solar radiation. This allows temperature control that takes into account temperature fluctuations throughout the day.

[0008] Setting and inputting appropriate reference temperature values ​​(heating control reference temperature values ​​or window opening control reference temperature values) at successive times to determine the heating control reference temperature line and window opening control reference temperature line is a significant burden. For this reason, it is preferable to set and input only the reference temperature values ​​at a plurality of specific times, for example, those that show major inflection points in the control reference temperature line, and to determine the reference temperature values ​​at other times by interpolation. For this reason, the present invention proposes that the heating control reference temperature line and the window opening control reference temperature line be generated by interpolating between the reference temperature values ​​at a plurality of specific times.

[0009] Depending on the time of day, a window can be fully opened to rapidly cool the interior space. For this reason, the present invention proposes that, when the measured interior air temperature exceeds the window opening control reference air temperature line, the window control unit issues a command to fully open the window as the window opening adjustment operation.

[0010] On the other hand, when the internal temperature does not require rapid cooling or air exchange of the internal space, for example, when the measured internal temperature is slightly lower than the window opening control reference temperature value at the control time, it is preferable to open the window halfway or one-quarter. For this reason, the present invention proposes that when the measured internal temperature is between the window opening control reference temperature line and the heating control reference temperature line, the window control unit commands a window partial opening operation to partially open the window as the window opening adjustment operation.

[0011] Windows include skylights, side windows, and even curtains placed inside windows. The degree to which the opening / closing degree of a window affects the temperature of an interior space varies depending on the type, size, and location of the window, as well as the season and wind direction and strength. Therefore, in window opening / closing degree adjustment control, it is preferable to divide the windows into multiple groups based on their type and orientation, and perform separate opening / closing degree adjustment control for each group. Therefore, the present invention proposes dividing the windows into at least a first window group and a second window group, and the window control unit includes a first window control unit that commands the window opening adjustment operation for the first window group and a second window control unit that commands the window opening adjustment operation for the second window group, and the window opening degree control reference temperature line includes a first window opening degree control reference temperature line used by the first window control unit and a second window opening degree control reference temperature line used by the second window control unit. Here, the terms "first" and "second" are used for explanatory purposes, and the number of groups and the number of control reference temperature lines can be selected arbitrarily.

[0012] Horticultural facilities are exposed to severe weather conditions such as strong warm air, strong cold air, strong winds, heavy rain, and heavy snow. Therefore, it may be difficult to quickly and sufficiently maintain an internal temperature simply by using a control threshold value based on a control reference temperature obtained based on a measured internal temperature and time. For this reason, it may be preferable to perform heating control or window opening control that is different from the normal heating control based on meteorological information such as weather forecasts and various types of weather-related information that affect the weather. Therefore, the present invention proposes providing an exception control determination unit that issues an exception control command based on the weather-related information, and based on the exception control command, the window control unit commands the window opening device to adjust the window opening while ignoring the window opening control reference temperature line, and based on the exception control command, the heating control unit commands the heater to perform the heating operation while ignoring the heating control reference temperature line.

[0013] For the temperature control system of the present invention, the internal temperature of the horticultural facility is an important control factor, so any problems with the thermometer can be fatal. For this reason, it is preferable to add the internal temperature of the horticultural facility to the temperature measurement system, or to use a temperature estimation system that estimates the internal temperature of the horticultural facility based on weather information obtained from outside instead of the temperature measurement system. Furthermore, a temperature control system in which a temperature estimation system operates instead of a temperature measurement system is also within the scope of the present invention. Such an air temperature control system comprises a heater that supplies thermal energy to the interior space of the horticultural facility, a heating control unit that controls the heating operation of the heater, a window opening operation device that operates the window opening degree of the window, and a window control unit that controls the window opening adjustment operation of the window opening operation device, wherein the heating control unit refers to a heating control reference air temperature line set on a time basis, and when the estimated internal air temperature estimated by the air temperature estimation unit falls below the heating control reference air temperature line, it commands the heater to perform the heating operation, the window control unit refers to a window opening control reference air temperature line set on a time basis, and when the estimated internal air temperature exceeds the window opening control reference air temperature line, it commands the window opening operation device to perform the window opening adjustment operation, and the window opening control reference air temperature line indicates an air temperature higher than the heating control reference air temperature line over the entire time range. A temperature control system using such a temperature estimation system also exhibits the same functions and effects as the temperature control system using the above-mentioned temperature measurement system. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic diagram of a temperature control system within a horticultural facility. [Figure 2] FIG. 2 is a functional block diagram of the temperature control system. [Figure 3] FIG. 10 is a schematic diagram showing the process of generating a heating control reference temperature line and a window opening control reference temperature line managed by a control reference temperature line management unit. [Figure 4] FIG. 10 is a flowchart illustrating an example of temperature control. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of the present invention will be described with reference to the drawings. Figure 1 shows an outline of a temperature control system for a horticultural facility. In Figure 1, the left side of Figure 1 is "west," the right side of Figure 1 is "east," the upper side of Figure 1 is "up (upward)," the lower side of Figure 1 is "down (downward)," and the directions perpendicular to the plane of Figure 1 indicate "south" and "north."

[0016] This horticultural facility 1 is a facility for growing cultivated plants, such as a greenhouse or a plant factory. In its lower area, planting beds (ridges) and cultivation beds (bed cultivation) are arranged for planting cultivated plants such as tomatoes and strawberries. The building has side walls 1a and a ceiling 1b, and the temperature in the interior space is managed by a temperature control system.

[0017] In this embodiment, in order to regulate the temperature in the interior space, openable and closable side windows 2A are provided in the east-west, north-south side walls 1a, openable and closable skylights 2B are provided in the ceiling 1b, and furthermore, lining curtains (hereinafter simply referred to as curtains 2C) are provided on the interior space side of the side windows 2A and skylights 2B. Note that unless there is a particular need to distinguish between them, the side windows 2A, skylights 2B, and curtains 2C will be collectively referred to simply as windows 2.

[0018] The horticultural facility 1 is provided with a thermometer 8 that measures the temperature of the interior space (internal temperature). The horticultural facility 1 is also provided with a heater 3 that supplies thermal energy to the interior space based on the internal temperature measured by the thermometer 8 to raise the temperature of the interior space. The facility is also provided with a plurality of window opening devices 4, including electric motors and electric cylinders that control the opening degrees of the windows 2. A control unit 5 that controls the operation of the heater 3 and window opening devices 4 is also provided in the interior space of the horticultural facility 1 or outside the horticultural facility 1.

[0019] As shown in Figure 2, the central functional units of the temperature control system are constructed in a control unit 5. The control unit 5 includes functional units related to the present invention: a data input unit 5A, a data output unit 5B, a data storage unit 51, a time management unit 52, and a heating control unit 53. The control unit 54, an exception control determination unit 55, and a control reference temperature line management unit 6. The control unit 5 is essentially composed of a computer system with data communication capabilities, and each of the above-mentioned functional units is constructed using software (functions are realized by installed computer programs), hardware, or both. Furthermore, temperature control information indicating the content of temperature control in this temperature control system is sent to a management center 100 that manages the horticultural facility 1.

[0020] The data input unit 5A receives data and signals from the outside and transfers them to the relevant functional units of the control unit 5. Such data and signals include, for example, the measured internal temperature measured by the thermometer 8, weather-related information (weather information such as weather forecasts and various information that affects the weather) downloaded from an external database site CS such as a cloud service, and operation input signals from the manual operation unit 50 such as a keyboard or touch panel.

[0021] The data output unit 5B outputs control signals and data generated by the functional units of the control unit 5 to external devices. Such external devices include the heater 3 to which a heating operation command is given, the window opening device 4 to which a window opening adjustment operation command is given, and the notification device 59 to which audio information and display information are given. The notification device 59 may be a speaker, a display, a printer, or the like. In this embodiment, temperature control information indicating the content of temperature control in this temperature control system is sent to a management computer installed in the management center 100 via the data output unit 5B and a communication line.

[0022] The data storage unit 51 stores data, programs, etc. used by the functional units of the control unit 5. Furthermore, the data storage unit 51 temporarily stores data and signals input via the data input unit 5A, and data and signals generated by each functional unit of the control unit 5. The time management unit 52 functions as a clock, and provides the current time to functional units that require it.

[0023] In this embodiment, the heating control unit 53 controls the heating operation of the heater 3 in any one of normal mode, exception mode, and manual mode. In normal mode, the heating control unit 53 generates a heating operation command, which is a control command for the heater 3, by referring to the reference temperature value at the time of control (current time) on the heating control reference temperature line 61. The heating control reference temperature line 61 is a control reference line (control condition) that substantially continuously shows the heating control reference temperature value set on a time basis. In exception mode, the heating control unit 53 generates a heating operation command based on the control condition determined by the exception control determination unit 55. In manual mode, the heating control unit 53 generates a heating operation command based on an operation input signal from the manual operation unit 50.

[0024] The window control unit 54 generates a window opening adjustment operation command for controlling the window opening adjustment operation of the window opening device 4. The window control unit 54 also controls the window opening adjustment operation of the window opening device 4 in any one of normal mode, exception mode, and manual mode. In normal mode, the window control unit 54 generates a window opening adjustment operation command, which is a control command for the window opening device 4, by referring to the reference temperature value at the time of control (current time) on the window opening control reference temperature line 62. The window opening control reference temperature line 62 is a control reference line (control condition) that substantially continuously shows the window opening control reference temperature value set on a time basis. The window opening control reference temperature value is set on a time basis. In exception mode, the window control unit 54 generates a window opening adjustment operation command based on the control condition determined by the exception control determination unit 55. In manual mode, the window control unit 54 generates a window opening adjustment operation command based on an operation input signal from the manual operation unit 50. The heating control reference temperature line 61 and the window opening control reference temperature line 62 are managed by the control reference temperature line management unit 6 as a look-up table.

[0025] The windows 2 can be composed of side windows 2A, skylights 2B, and curtains 2C. The side windows 2A are divided into east-facing side windows 2A, west-facing side windows 2A, south-facing side windows 2A, and north-facing side windows 2A (shown as east windows, west windows, south windows, and north windows in Figure 2, respectively), and the skylights 2B can also be divided into east-facing skylights 2B, west-facing skylights 2B, south-facing skylights 2B, and north-facing skylights 2B (shown as east skylights, west skylights, south skylights, and north skylights in Figure 2, respectively). Furthermore, the side windows 2A and skylights 2B are equipped with curtains 2C. These windows 2, which differ in their installation locations and types, have different degrees of impact on the temperature in the interior space of the horticultural facility 1. For this reason, in this embodiment, the windows 2 are divided into at least a first window group and a second window group, and the window control unit 54 includes a first window control unit 54a that commands the window opening adjustment operation of the first window group and a second window control unit 54b that controls the window opening adjustment operation of the second window group. In this case, the first window control unit 54a uses the first window opening control reference temperature line as the window opening control reference temperature line 62, and the second window control unit 54b uses the second window opening control reference temperature line as the window opening control reference temperature line 62. In other words, the window control unit 54 can perform window opening control distributed according to the number of window groups.

[0026] 3 shows a schematic diagram of the process for generating the heating control reference temperature line 61 and the window opening control reference temperature line 62 managed by the control reference temperature line management unit 6. The heating control reference temperature line 61 and the window opening control reference temperature line 62 may be generated by the control reference temperature line management unit 6, or may be generated by another computer system and transferred to the control reference temperature line management unit 6.

[0027] The process for generating the heating control reference temperature line 61 and the window opening control reference temperature line 62 is essentially the same, so here we will explain the process for generating the heating control reference temperature line 61. First, heating control reference temperature values ​​(T1, T2, . . . , T6) at multiple specific times (six time points: t1, t2, . . . , t6 in the example of FIG. 3) are determined in advance. These predetermined heating control reference temperature values ​​may be experimental values ​​at an actual horticultural facility 1, calculated values ​​through simulation, statistically calculated values ​​of reference temperature values ​​at many horticultural facilities 1, or correction values ​​independently modified by the manager. The horizontal axis of the heating control reference temperature line 61 represents time, and the vertical axis represents the heating control reference temperature value. Therefore, the points determined by a specific time and the reference temperature value at that specific time (referred to as time reference temperature points) are indicated by P1, P2, . . . , and P6 in FIG. 3, respectively.

[0028] The valid time range of the horizontal axis of the heating control reference temperature line 61 and the window opening control reference temperature line 62 is preferably the time range from sunrise to sunset, but it may be longer or shorter than that. In some cases, the valid time range may be the entire day.

[0029] Next, the heating control reference temperature values ​​between each of the time reference temperature points are calculated by interpolation. Here, linear interpolation is used as the interpolation, but nonlinear interpolation may also be used. The heating control reference temperature values ​​between each of the time reference temperature points calculated by interpolation are indicated by L1, L2, ..., and L6 in Figure 3, respectively.

[0030] Finally, the heating control reference temperature line 61 is generated by connecting the time reference temperature point with the heating control reference temperature value, which is the interpolated value. A window opening control reference temperature line 62 is also generated using a similar process. As is clear from FIG. 3 , in the present invention, the window opening control reference temperature line 62 indicates a higher temperature than the heating control reference temperature line 61 over the entire time range. While the interval between the heating control reference temperature line 61 and the window opening control reference temperature line 62 is the same in FIG. 3 , this may be different within a specific partial time range or over the entire range. Furthermore, while the time reference temperature points of the heating control reference temperature line 61 and the window opening control reference temperature line 62 are the same in FIG. 3 , they may be different from each other. Furthermore, the number of time reference temperature points may also be different. What is important about the relationship between the heating control reference temperature line 61 and the window opening control reference temperature line 62 is that the window opening control reference temperature line 62 indicates a higher temperature than the heating control reference temperature line 61 over the entire time range, and this control condition maintains the interior space of the horticultural facility 1 at an appropriate temperature. When the windows 2 are divided into groups, the first window opening control reference temperature line is generated by interpolating the hourly reference temperature values ​​set for the first window group, and the second window opening control reference temperature line is generated by interpolating the hourly reference temperature values ​​set for the second window group.

[0031] Next, an example of heating control that references heating control reference temperature line 61, i.e., heating control in normal control mode, and window opening control that references window opening control reference temperature line 62, i.e., window opening control in normal control mode, will be described. Heating control reference temperature line 61 and window opening control reference temperature line 62 are prepared in the form of a lookup table, and heating control reference temperature values ​​and window opening control reference temperature values ​​are read out based on the time. The read heating control reference temperature value and window opening control reference temperature value are used as control thresholds (control conditions).

[0032] During heating control, the measured internal temperature from thermometer 8 is obtained as the current temperature (temperature at the time of control), and the heating control reference temperature value at the current time is read from heating control reference temperature line 61. If the current temperature (internal measured temperature) is below the heating control reference temperature value, heating control unit 53 commands heater 3 to perform heating operation (ON operation). If the current temperature is equal to or higher than the heating control reference temperature value and heater 3 is in heating operation, heating control unit 53 commands heater 3 to stop heating operation (OFF operation). However, if heater 3 is configured to operate for only a predetermined time in response to a heating operation command, a heating operation stop command is not necessary.

[0033] Window opening control is similar to heating control, in that the measured internal temperature from thermometer 8 is obtained as the current temperature, and the window opening control reference temperature value for the current time is read from window opening control reference temperature line 62. If the measured internal temperature exceeds the window opening control reference temperature value, window control unit 54 issues a command to fully open window 2 as the window opening adjustment operation. Furthermore, if the measured internal temperature is between the window opening control reference temperature value and the heating control reference temperature value for the same time, window control unit 54 issues a command to partially open window 2 as the window opening adjustment operation.

[0034] The heating control and window opening control described above are merely examples, and the heating operation of the heater 3 or the window opening adjustment operation of the window 2 may be changed depending on the difference between the heating control reference temperature value or window opening control reference temperature value used as the control threshold and the current temperature. Also, instead of using the internal temperature measured by the thermometer 8 as the current temperature as is, the measured internal temperature may be corrected using a correction coefficient determined from the relationship between the position of the thermometer 8 and the position of the cultivated plant, and then used as the current temperature.

[0035] In the exception mode, heating control is performed based on the control conditions determined by the exception control determination unit 55. The exception control determination unit 55 acquires weather-related information, such as weather forecasts and various types of information affecting the weather, from an external database site CS or the like. For example, if the acquired weather-related information includes information about the approach of strong cold air, strong winds, or heavy rain, the exception control determination unit 55 requests heating control to maintain a higher-than-normal internal temperature or window opening control to forcibly close at least some of the windows 2 facing in a certain direction. In other words, when abnormal weather is predicted, based on the request (exception control command) from the exception control determination unit 55, the heating control unit 53 commands the heater 3 to perform heating operation while ignoring the heating control reference temperature line 61, and the window control unit 54 commands the window opening device 4 to adjust the window opening while ignoring the window opening control reference temperature line 62.

[0036] Next, an example of temperature control inside the horticultural facility 1 will be described using the flowchart of FIG. When temperature control is started, first, the current time and the internal temperature are acquired (#01, #02). Then, weather-related information is acquired (#03). The acquired weather-related information is checked to see if it contains any abnormal weather information that will affect temperature control or window opening control, i.e., whether the exceptional control condition is met (#04). In the check of step #04, it is determined whether the weather-related information indicates a level of approaching strong cold air, approaching strong winds, approaching heavy rain, or the like that exceeds a predetermined level. For this reason, the weather-related information is quantified in advance so that a threshold can be determined.

[0037] If the exceptional control condition is not met (No branch at #04), normal mode is executed. In normal mode, the reference temperature value (heating control reference temperature value) of heating control reference temperature line 61 at the current time is obtained (#05), and heating control is performed using this heating control reference temperature value as the control threshold value (#06). Furthermore, the reference temperature value (window opening control reference temperature value) of window opening control reference temperature line 62 at the current time is obtained (#07), and window opening control is performed using this window opening control reference temperature value as the control threshold value (#08).

[0038] In step #04, a check is made to see if the exceptional control conditions are met. If the exceptional control conditions are met (Yes branch in #04), the above-mentioned exception mode is executed (#10). When control in normal mode or exceptional mode ends, a check is made to see if an end command for this temperature control has been issued (#20). If an end command has not been issued (No branch in #20), a jump is made to step #01, and the above-mentioned temperature control is repeated. If an end command has been issued in step #04 (Yes branch in #20), this temperature control ends.

[0039] Although the above-described description of the embodiment does not mention irrigation work, which is important for plant cultivation, the horticultural facility 1 is of course also provided with an irrigation device 70 as shown in FIG. 1 , and an irrigation control device 7 that controls the irrigation device 70. The irrigation control device 7 exchanges information with the control unit 5 and performs linked irrigation control. The irrigation control device 7 may be incorporated into the control unit 5. In addition, a humidity adjustment device, a carbon dioxide adjustment device, and the like are also provided, but their description is omitted here. Note that only the characteristic items of the control operation of the irrigation control device 7 will be described below. (1) When the humidity exceeds a predetermined value, watering is stopped. (2) On sunny days, the amount of irrigation is determined by adding the amount of solar radiation to the control factors of irrigation control. (3) If the humidity is higher than the standard value and the amount of solar radiation is lower than the standard value, reduce the amount of irrigation water.

[0040] A plurality of heaters 3 may be installed in the horticultural facility 1. The type of heater 3 is not limited in the present invention, but can be selected from a hot air heater, a heat pump, a hot water heater, and the like.

[0041] [Another embodiment]

[0042] (1) For the temperature control system of the present invention, the thermometer 8, which measures the internal temperature of the horticultural facility 1, is an important basic component. In preparation for the possibility that the internal temperature cannot be measured due to a malfunction of the thermometer 8 or a disconnection of the signal line, the temperature control system may include a temperature estimation unit 80, as shown by the dotted line in FIG. 2 , which estimates the internal temperature of the horticultural facility based on externally acquired weather information (including information from the Japan Meteorological Agency or a private weather company, and meteorological measurement data for the area where the horticultural facility 1 is installed). The heating control unit 53 uses the estimated internal temperature acquired from the temperature estimation unit 80 to issue a heating command to the heater 3, as described above, and the window control unit 54 uses the estimated internal temperature acquired from the temperature estimation unit 80 to issue a window opening command to the window-opening device 4, as described above. Of course, a temperature estimation unit 80 that includes the temperature estimation unit 80 instead of the thermometer 8 is also within the scope of the present invention.

[0043] (2) In the above-described embodiment, the horticultural facility 1 to which the temperature control system of the present invention is applied is assumed to be a greenhouse or a cultivation factory building equipped with side windows 2A, skylights 2B, and curtains 2C, but the horticultural facility 1 may be equipped with only side windows 2A or only skylights 2B, or may be equipped with no curtains 2C.

[0044] (3) The plants cultivated in the horticultural facility 1 may be agricultural crops such as strawberries and tomatoes, or ornamental plants such as flowers.

[0045] (4) In the temperature control in the exception mode, the temperature may be forcibly lowered by a cooling device.

[0046] (5) The functional block diagram shown in Figure 2 is primarily for explanatory purposes, and the functional units may be integrated with each other or further divided. In addition, a plurality of control units 5 may be provided and configured to cooperate with each other.

[0047] The configurations disclosed in the above embodiments (including other embodiments, the same applies below) can be applied in combination with configurations disclosed in other embodiments, as long as no contradiction arises. Furthermore, the embodiments disclosed in this specification are examples, and the embodiments of the present invention are not limited to these, and can be modified as appropriate within the scope that does not deviate from the purpose of the present invention. [Industrial Applicability]

[0048] The present invention can be applied to a temperature control system for controlling the temperature inside a horticultural facility. [Explanation of symbols]

[0049] 1: Horticultural facilities 1a: Side wall 1b: Ceiling 2: Window 2A: Side window 2B: Skylight 2C: Curtain 3: Warming machine 4: Window opening operation device 5: Control unit 50: Manual operation unit 51: Data storage unit 52: Time management department 53: Heating control unit 54: Window control unit 54a: First window control section 54b: Second window control section 55: Exception control decision part 6: Control reference temperature line management section 61: Heating control reference temperature line 62: Window opening control reference temperature line 8: Thermometer 80: Temperature estimation unit

Claims

1. A temperature control system for a horticultural facility equipped with windows, comprising: a thermometer for measuring the internal temperature of the horticultural facility; a heater that supplies heat energy to the interior space of the horticultural facility; a heating control unit that controls the heating operation of the heater; a window opening operating device for operating the window opening degree; a window control unit that controls the window opening adjustment operation of the window opening operation device, The heating control unit refers to a heating control reference temperature line set in units of time, and when the measured internal temperature measured by the thermometer is below the heating control reference temperature line, commands the heater to perform the heating operation; the window control unit refers to a window opening control reference temperature line set for the time unit, and when the measured internal temperature exceeds the window opening control reference temperature line, commands the window opening operation device to adjust the window opening; A temperature control system in which the window opening control reference temperature line indicates a temperature higher than the heating control reference temperature line over the entire time range.

2. The temperature control system according to claim 1 , wherein the heating control reference temperature line and the window opening control reference temperature line are generated by interpolating between reference temperature values ​​at a plurality of specific times.

3. 2. The temperature control system according to claim 1, wherein when the measured internal air temperature exceeds the window opening control reference air temperature line, the window control unit commands a window full-open operation to fully open the window as the window opening adjustment operation.

4. The temperature control system described in claim 3, wherein when the measured internal temperature is between the window opening control reference temperature line and the heating control reference temperature line, the window control unit commands a partial window opening operation to partially open the window as the window opening adjustment operation.

5. The windows are divided into at least a first window group and a second window group; The window control unit includes a first window control unit that commands the window opening adjustment operation of the first window group, and a second window control unit that controls the window opening adjustment operation of the second window group, 2. The temperature control system according to claim 1, wherein the window opening control reference temperature line includes a first window opening control reference temperature line used for the first window control unit and a second window opening control reference temperature line used for the second window control unit.

6. an exceptional control decision unit that issues exceptional control commands based on weather-related information; Based on the exception control command, the window control unit commands the window opening operation device to perform the window opening adjustment operation while ignoring the window opening control reference temperature line, The temperature control system according to claim 1 , wherein the heating control unit instructs the heater to perform the heating operation ignoring the heating control reference temperature line based on the exception control command.

7. A temperature control system for a horticultural facility equipped with windows, comprising: a temperature estimation unit that estimates an internal temperature of the horticultural facility based on meteorological information acquired from outside; a heater that supplies heat energy to the interior space of the horticultural facility; a heating control unit that controls the heating operation of the heater; a window opening operating device for operating the window opening degree; a window control unit that controls the window opening adjustment operation of the window opening operation device, The heating control unit refers to a heating control reference temperature line set in units of time, and when the estimated internal temperature estimated by the temperature estimation unit is below the heating control reference temperature line, commands the heater to perform the heating operation; the window control unit refers to a window opening control reference temperature line set for the time unit, and when the estimated inside air temperature exceeds the window opening control reference temperature line, commands the window opening operation device to perform the window opening adjustment operation; A temperature control system in which the window opening control reference temperature line indicates a temperature higher than the heating control reference temperature line over the entire time range.

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