JP5868740B2 - Air conditioning control device and air conditioning control method - Google Patents

Description

  Embodiments described herein relate generally to an air conditioning control device and an air conditioning control method.

  Conventionally, in an air conditioning control device, air heated by heat generated in a room to be controlled is cooled, and air conditioning control is performed to reduce the indoor concentration of an undesirable gas such as CO 2 by introducing outside air. Among the air conditioning controls, the former requires energy for cooling the heated air, and the latter requires energy for cooling (summer) or heating (winter) the outside air to an appropriate temperature. Among these, since the energy required for the latter outside air treatment is mainly proportional to the amount of outside air introduced, a technique for reducing energy by suppressing the amount of outside air introduced has been proposed. For example, a technique has been proposed in which a device that performs outside air processing is stopped or the number of rotations of a fan that introduces outside air is changed in accordance with the CO2 concentration in a room to be controlled.

JP-A-6-213494 JP 2010-71489 A

By the way, it is known that the energy required for the outside air treatment is affected not only by the amount of outside air introduced but also by the state of the outside air. However, the above conventional art, no consideration is attached to the outside air condition, there may not be able to reduce the energy required for outside air processing in outside air state is to that Jo Tokoro change time efficiently It was.

An air conditioning control device according to an embodiment includes an air supply fan that takes in outside air having an air volume according to the number of rotations of a fan into an outside air coil, adjusts temperature or humidity, and blows outside air into a room to be air- conditioned. in the air conditioning control device for controlling a system, comprising an outer air introduction amount optimizing means, and outside air introducing amount control means. Outer air introduction amount optimization means, in a predetermined future time, the predicted value of the outside air enthalpy and carbon dioxide concentration, the indoor emission amount of carbon dioxide and the air supply fan is the predicted value of the enthalpy of the supplied air supply into the room based, at ambient processing energy required for room air-conditioning process in the predetermined time is minimized, and the carbon dioxide concentration in the room to calculate the external air to be less than a predetermined value. Outside air introduction amount control means, the air flow that is blown into the room is a such so that the air volume calculated by the outside air introduction amount optimization means, for controlling the rotational speed of the supply air fan.

Drawing 1 is a figure showing the example of composition of the air-conditioning control device concerning an embodiment. FIG. 2 is a diagram schematically illustrating an example of the configuration of the outside air introduction amount control unit illustrated in FIG. 1. FIG. 3 is a diagram schematically illustrating another example of the configuration of the outside air introduction amount control unit illustrated in FIG. 1. FIG. 4 is a diagram schematically illustrating a configuration example of the outside air introduction amount optimization unit illustrated in FIG. 1. FIG. 5 is a diagram illustrating an example of the time course of the outside air CO2 concentration. FIG. 6 is a flowchart illustrating an example of an outside air introduction amount optimization process executed by the outside air introduction amount optimization unit illustrated in FIG. 1. FIG. 7 is a diagram illustrating an example of a time transition of the outside air introduction amount by the outside air introduction amount optimization process. FIG. 8 is a diagram illustrating an example of a time transition of the CO2 concentration in the room by the outside air introduction amount optimization process. FIG. 9 is a diagram illustrating another configuration example of the air conditioning control device illustrated in FIG. 1. FIG. 10 is a diagram schematically illustrating a configuration of the building management system 3 according to the embodiment.

  Embodiments of an air conditioning control device and an air conditioning control method according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram illustrating a configuration example of an air conditioning control device according to the present embodiment. As shown in the figure, the air conditioning control device 1 includes an outside air processing unit 10 that performs an air conditioning process of outside air, a return air processing unit 20 that performs an air conditioning process of return air from the living room 2 that is a room subject to air conditioning control, And an air supply unit 30.

  The outside air processing unit 10 includes a CO2 concentration sensor 11, an air supply fan 12, an outside air coil 14, an air volume sensor 15, an outside air introduction amount control unit 16, an outside air introduction amount optimization unit 17, and an outside air CO2 concentration. Sensor 13.

  The CO2 concentration sensor 11 measures the CO2 concentration of exhaust or return air taken from the living room 2.

  The air supply fan 12 is installed together with the outside air coil 14 and is controlled by an inverter. By operating at the number of revolutions set by the control of the outside air introduction amount control unit 16 to be described later, A large amount of outside air is taken into the outside air coil 14 and the outside air adjusted by the outside air coil 14 is blown to the air supply unit 30 at a wind speed corresponding to the set number of rotations. Here, the outside air adjusted by the outside air coil 14 is blown to the air supply unit 30 through the duct 40.

  The outside air CO2 concentration sensor 13 measures the CO2 concentration of outside air taken in by the supply fan 12 being operated.

  The outside air coil 14 adjusts at least one of the temperature and humidity of outside air taken in by operating the air supply fan 12 using cold water or hot water.

The air volume sensor 15 measures the air volume (m ³ / h) of the outside air blown by the air supply fan 12. In addition, it is good also as a form which measures a wind speed instead of an air volume, and converts into air volume in the external air introduction amount control part 16 mentioned later, and in this case, an air quantity is sent from the external air introduction amount control part 16 to the external air introduction amount optimization part 17 Shall be notified.

  The outside air introduction amount control unit 16 controls the outside air introduction amount by controlling the set value of the rotation speed of the air supply fan 12. Here, the outside air introduction amount control unit 16 controls the outside air introduction amount using one of the two control methods (first control method and second control method) described below. .

  As a first control method, the outside air introduction amount control unit 16 supplies the air volume measured by the air volume sensor 15 so that the outside air introduction amount setting calculated by the outside air introduction amount optimization unit 17 described later is substantially equal. The set value of the rotational speed of the air fan 12 is controlled. In this case, PID control based on the deviation between the air volume measured by the air volume sensor 15 and the outside air introduction amount setting can be used to control the set value of the rotation speed of the air supply fan 12.

  As a second control method, the outside air introduction amount control unit 16 is substantially the same as the CO2 concentration setting in which the CO2 concentration of the exhaust gas or the return air measured by the CO2 concentration sensor 11 is calculated by the outside air introduction amount optimization unit 17 described later. The set value of the rotational speed of the air supply fan 12 is controlled so as to be equivalent. In this case, the set value of the rotation speed of the supply air fan 12 is controlled based on the deviation between the CO2 concentration measured by the CO2 concentration sensor 11 and the CO2 concentration setting calculated by the outside air introduction amount optimization unit 17. PID control or the like can be used.

  As shown in FIG. 1, when a plurality of indoor CO2 concentration sensors 31 for measuring the CO2 concentration of the living room 2 are provided in the living room 2, an indoor CO2 concentration sensor is used instead of the CO2 concentration sensor 11. The setting value of the rotational speed of the air supply fan 12 may be controlled using the CO 2 concentration measured at 31. In this case, at least one of the CO2 concentrations measured by each of the indoor CO2 concentration sensors 31 or a weighted average value can be used as the CO2 concentration of the exhaust or return air.

  Hereinafter, the configuration of the outside air introduction amount control unit 16 will be described with reference to FIGS. 2 and 3. Here, FIG. 2 is a diagram schematically illustrating a configuration example of the outside air introduction amount control unit 16 in the case where the first control method described above is employed. As shown in the figure, the outside air introduction amount control unit 16 includes subtracters 161 and 162, filter units 163 and 164, PID controllers 165 and 166, an adder 167, and a filter unit 168. .

  The subtracter 161 subtracts the air volume of the outside air (outside air volume) measured by the air volume sensor 15 from the outside air introduction volume setting calculated by the outside air introduction volume optimizing unit 17 described later, and filters the subtraction result as an input value. To the unit 163. The filter unit 163 outputs the input value from the subtracter 161 as it is to the PID controller 165 as an output value.

  The PID controller 165 derives a set value for the rotational speed of the air supply fan 12 based on the output value of the filter unit 163. Here, it is assumed that the PID controller 165 performs an operation based on a predetermined gain or the like so that the rotational speed increases as the output value of the filter unit 163 increases. In the case of the first control method, since the subtraction result of the subtracter 161 is directly input to the PID controller 165, the subtracter 161 and the PID controller 165 are directly connected without providing the filter unit 163. It is good also as a form.

  On the other hand, in the subtractor 162, the CO2 concentration sensor 11 (or the indoor CO2 concentration sensor 31) measures the CO2 concentration in the living room 2 from the preset upper limit value (CO2 concentration upper limit value) in the living room 2. The CO2 concentration (in-room CO2 concentration) is subtracted, and the subtraction result is output to the filter unit 164 as an input value. When the input value from the subtractor 162 is negative, that is, when the CO2 concentration in the room exceeds the CO2 concentration upper limit value, the filter unit 164 outputs the input value as it is to the PID controller 166 as an output value. The filter unit 164 outputs the output value 0 to the PID controller 166 when the input value from the subtractor 162 is positive (including 0), that is, when the CO2 concentration in the room is equal to or lower than the CO2 concentration upper limit value.

  The PID controller 166 derives a set value for the rotational speed of the air supply fan 12 based on the input value from the filter unit 164. Here, the PID controller 166 performs an operation based on a predetermined gain or the like so that the rotational speed increases as the output value of the filter unit 163 decreases.

  The adder 167 adds the calculation results (set value of the rotation speed) in the PID controller 165 and the PID controller 166, and outputs the addition result to the subsequent filter unit 168.

  When the addition result of the adder 167 exceeds a predetermined upper limit value (Fmax) of the rotation speed of the air supply fan 12, the filter unit 168 sets the upper limit value as a set value for the rotation speed and sets the supply fan 12. Output to. In addition, when the addition result of the adder 167 is less than a predetermined lower limit value (Fmin) of the rotation speed of the air supply fan 12, the filter unit 168 uses the lower limit value as a set value for the rotation speed. Output to the fan 12. In addition, when the addition result of the adder 167 is equal to or higher than the lower limit value (Fmin) and lower than the upper limit value (Fmax) of the rotational speed of the air supply fan 12, the filter unit 168 sets the rotational speed as the rotational speed setting. The value is output to the air supply fan 12 as a value.

  As described above, when the first control method is adopted, the outside air introduction amount is a normal PID control loop, and the CO2 concentration exceeds the upper limit value of the CO2 concentration determined by the building management method or the administrator. The PID control loop operates. As a result, the CO2 concentration of the exhaust gas or the return air measured by the CO2 concentration sensor 11 can be controlled so as not to exceed the upper limit value of the CO2 concentration, and the CO2 concentration setting calculated by the outside air introduction amount optimization unit 17 to be described later can be used. It can control to become substantially equivalent.

  FIG. 3 is a diagram schematically illustrating a configuration example of the outside air introduction amount control unit 16 when the second control method described above is employed. In this configuration, the external input value and the filter setting are different from the configuration described in FIG. 2, but the description will be made using the same components (reference numerals) in consideration of the comparison relationship with the configuration in FIG.

  The subtracter 161 subtracts the air volume of the outside air (outside air volume) measured by the air volume sensor 15 from the outside air introduction volume setting calculated by the outside air introduction volume optimizing unit 17 described later, and filters the subtraction result as an input value. To the unit 163. The filter unit 163 always outputs the output value 0 to the PID controller 165 regardless of the input value from the subtracter 161.

  The PID controller 165 calculates the rotation speed of the air supply fan 12 based on the output value of the filter unit 163. Here, it is assumed that the PID controller 165 calculates “0” or a predetermined constant as the rotation speed of the air supply fan 12. Therefore, when the second control method is adopted, the subtracter 161, the filter unit 163, and the PID controller 165 may be removed from the configuration of FIG.

  On the other hand, in the subtractor 162, the CO2 concentration in the living room 2 (in the room) measured by the CO2 concentration sensor 11 (or the indoor CO2 concentration sensor 31) from the CO2 concentration setting calculated by the outside air introduction amount optimization unit 17 described later. (CO2 concentration) is subtracted, and the subtraction result is output to the filter unit 164 as an input value. The filter unit 164 outputs the input value from the subtractor 162 as it is to the PID controller 166 as an output value.

  The PID controller 166 calculates the rotation speed of the air supply fan 12 based on the output value of the filter unit 164. Here, it is assumed that the PID controller 166 calculates based on a predetermined setting value so that the rotational speed increases as the output value of the filter unit 164 increases. In the case of the second control method, the filter unit 164 may not be provided, and the subtraction result of the subtracter 162 may be directly output to the PID controller 166 as an input value. The operations of the adder 167 and the filter unit 168 are the same as the operations in the first control method.

  As described above, when the second control method is adopted, the CO2 concentration is set to a normal PID control loop, and the PID control loop related to the outside air introduction amount is not operated. As a result, the CO2 concentration of the exhaust gas or the return air measured by the CO2 concentration sensor 11 can be controlled so as not to exceed the upper limit value of the CO2 concentration, and the CO2 concentration setting calculated by the outside air introduction amount optimization unit 17 to be described later can be used. It can control to become substantially equivalent.

  It should be noted that which of the first control method and the second control method is adopted is not particularly limited, but is preferably determined according to the environment of the living room 2, for example. Further, the outside air introduction amount control unit 16 may be configured such that both control methods can be switched by switching filter coefficients of the filter unit 163 and the filter unit 164.

  Returning to FIG. 1, the outside air introduction amount optimization unit 17 is a computer such as a microcomputer or a PC (Personal Computer), and calculates the outside air introduction amount setting and the CO 2 concentration setting related to the control of the outside air introduction amount. Hereinafter, the configuration of the outside air introduction amount optimization unit 17 will be described.

  FIG. 4 is a diagram schematically illustrating a configuration example of the outside air introduction amount optimization unit 17. As shown in the figure, the outside air introduction amount optimization unit 17 includes a storage unit 1711, a display unit 1712, an outside air information acquisition unit 1713, a room information acquisition unit 1714, a specific enthalpy prediction unit 1715, an outside air CO2 concentration prediction unit 1716, The indoor CO2 generation amount prediction unit 1717, the indoor CO2 generation amount calculation unit 1718, the peak shift time setting input unit 1719, the outside air processing energy optimization unit 1720, the optimal outside air introduction amount output unit 1721, the optimal CO2 concentration setting output unit 1722, and An error correction unit 1723 is provided.

  The outside air introduction amount optimizing unit 17 includes a processor such as a CPU (Central Processing Unit), a computer configuration such as a ROM (Read Only Memory) and a RAM (Random Access Memory), an input device such as a keyboard, a weather forecast, and the like. It is assumed that a communication device or the like for communicating with an external device that provides the information (not shown) is provided.

  It should be noted that the outdoor air information acquisition unit 1713, the indoor room information acquisition unit 1714, the specific enthalpy prediction unit 1715, the outdoor air CO2 concentration prediction unit 1716, the indoor CO2 generation amount prediction unit 1717, the indoor CO2 generation amount calculation unit 1718, and the peak shift. Any or all of the time setting input unit 1719, the outside air processing energy optimization unit 1720, the optimum outside air introduction amount output unit 1721, the optimum CO2 concentration setting output unit 1722, and the error correction unit 1723 are realized by the cooperation of the processor and the program. A software configuration may be used, or a hardware configuration realized by a dedicated processor or the like may be used.

  The storage unit 1711 includes a storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Disk), and stores various programs and setting information for operating the outside air introduction amount optimization unit 17. The storage unit 1711 is derived from various measurement values input from the outside such as the CO2 concentration sensor 11 and the outside air CO2 concentration sensor 13, and from these measurement values by each unit of the outside air introduction amount optimization unit 17 or other devices. Various kinds of data (for example, the specific enthalpy of the outside air, the specific enthalpy of the supply air, the CO2 concentration of the outside air, the amount of CO2 generated in the room 2) are accumulated as history information.

  The display unit 1712 has a display device such as an LCD (Liquid Crystal Display), and displays various types of information (for example, the graphs shown in FIGS. 7 and 8), a user interface (GUI), and the like according to control of a processor (not shown). To do.

  The outside air information acquisition unit 1713 acquires the outside air volume (outside air volume) measured by the air volume sensor 15 and the outside air CO 2 concentration (outside air CO 2 concentration) measured by the outside air CO 2 concentration sensor 13. The living room information acquisition unit 1714 acquires the CO2 concentration (room CO2 concentration) in the living room 2 measured by the CO2 concentration sensor 11 (or the indoor CO2 concentration sensor 31).

  The specific enthalpy prediction unit 1715 predicts the specific enthalpy of the outside air and the specific enthalpy of the supply air into the living room 2 in the time zone for optimizing the outside air introduction amount (hereinafter referred to as the optimization target time). Here, the optimization target time is a time zone in which the function of the outside air processing energy optimization unit 1720 described later is validated, and an arbitrary time zone can be set via an input device (not shown) or the like. Suppose that Note that the outside air processing energy optimization unit 1720 sets the upper limit value of the indoor CO2 concentration as the CO2 concentration setting in a time zone other than the optimization target time for invalidating its function (not including a peak shift time described later). By outputting to the outside air introduction amount control unit 16, normal outside air introduction amount control based on the upper limit value of the CO2 concentration in the room is performed.

  Moreover, the prediction method of the specific enthalpy of outside air and the specific enthalpy of supply air is not particularly limited. For example, the specific enthalpy at the optimization target time may be predicted based on the past specific enthalpy of outside air and the specific enthalpy of supply air stored as history information in the storage unit 1711. Moreover, it is good also as a form which estimates (calculates) the specific enthalpy in optimization object time by following formula (4) etc. using the outdoor temperature and humidity for the future predetermined time obtained from a weather forecast.

  The outside air CO2 concentration prediction unit 1716 predicts the outside air CO2 concentration (outside air CO2 concentration) in the optimization target time. Here, the prediction method of the outside air CO2 concentration is not particularly limited. For example, the outside air CO2 concentration at the optimization target time may be predicted based on the past outside air CO2 concentration stored as history information in the storage unit 1711. Moreover, it is good also as a form which estimates (calculates) the outdoor air CO2 density | concentration in the optimization object time using the outdoor temperature and humidity for the future predetermined time obtained from a weather forecast.

  Further, as shown in FIG. 5, when the amount of change in the outside air CO2 concentration falls within a predetermined range throughout the day, a fixed value such as an average value or a representative value is used as the outside air CO2 concentration at the optimization target time. It is good also as a form made into this predicted value. Here, FIG. 5 is a figure which shows an example of the time passage of external air CO2 density | concentration, and has shown the measurement results L11-L14 in four places. In the figure, the vertical axis represents the outside air CO2 concentration (ppm), and the horizontal axis represents the passage of time (1-24 o'clock). Here, it can be seen that the measurement results L11 to L14 change in the range of 370 to 420 ppm throughout the day. In such a case, 390 ppm that is the average of this range, 400 ppm as a representative value, or the like may be used as the predicted value of the outside air CO2 concentration in the optimization target time.

  Returning to FIG. 4, the CO2 generation amount prediction unit 1717 in the living room predicts the CO2 generation amount (room CO2 generation amount) in the room 2 during the optimization target time. Here, the method for predicting the amount of CO2 generated in the living room is not particularly limited. For example, the room CO2 generation amount in the optimization target time may be predicted based on the past room CO2 generation amount stored as history information in the storage unit 1711. Moreover, it is good also as a form which estimates (calculates) the amount of indoor CO2 generation | occurrence | production in the optimization object time using the outdoor temperature and humidity for the future predetermined time obtained from a weather forecast.

The indoor CO2 generation amount calculation unit 1718 uses the following formula (1) based on the outdoor air CO2 concentration and the indoor CO2 concentration acquired by the outdoor air information acquisition unit 1713 and the indoor room information acquisition unit 1714, The amount of CO2 generated C (mL / h) in the room is calculated. Here, x1 is the in-room CO2 concentration (ppm = mL / m ³ ) acquired by the in-room information acquisition unit 1714, and x2 is the outside air CO2 concentration (ppm = mL) acquired by the outside air information acquisition unit 1713. / M ³ ). Foa is the current outside air introduction amount (m ³ / h) and corresponds to the measurement value (air amount) of the air amount sensor acquired by the outside air information acquisition unit 1713.

  The peak shift time setting input unit 1719 is a functional unit for setting a time zone in which the energy required for the outside air processing in the outside air processing unit 10 is desired to be lower than the optimization target time (hereinafter referred to as peak shift time). . For example, the peak shift time setting input unit 1719 cooperates with an input device (not shown) and a GUI for prompting the input of the peak shift time displayed on the display unit 1712, and the input peak shift time (for example, 10:00 to 11:00). ) As setting information in the storage unit 1711 or the like.

  The outside air processing energy optimization unit 1720 is based on the time measured by a time measuring unit (not shown) such as RTC (Real Time Clock), during the optimization target time and the peak shift time, the specific enthalpy prediction unit 1715, the outside air Using the predicted values predicted by the CO2 concentration prediction unit 1716 and the indoor CO2 generation amount prediction unit 1717, the outdoor air introduction amount setting or the indoor CO2 concentration setting at the optimization target time and peak shift time is derived.

  Specifically, the outside air processing energy optimization unit 1720 calculates the following equation (2) as a linear programming problem related to Foa [k] serving as an optimization variable.

  In the above formula (2), k (1 to n: n is an integer) is a subscript corresponding to the time range of the optimization target time. Q [k] is the outside air processing energy (kw) in the optimization target time [k], and w [k] is a weighting coefficient in the optimization target time [k]. The default value of w [k] is “1”, and w [k] is set to a predetermined value larger than 1 at the peak shift time set by the peak shift time setting input unit 1719.

In the above formula (2), x1 [k] is the indoor CO2 concentration (ppm = mL / m ³ ) in the optimization target time [k], and x1_sv [k] is the optimization target time [ k] is the upper limit value (ppm = mL / m ³ ) of the CO2 concentration in the room. Note that x1_sv [k] may be a fixed value regardless of the optimization target time [k]. Foa [k] is the outside air introduction amount (m ³ / h) in the optimization target time [k].

Of the above formula (2), the outside air processing energy Q [k] is derived by the following formula (3) using the specific enthalpy of the outside air and the specific enthalpy of the supply air predicted by the specific enthalpy prediction unit 1715. Note that h1 [k] is the specific enthalpy of supply air (kW / m ³ ) at the optimization target time [k], and h2 [k] is the specific enthalpy of outdoor air (kW) at the optimization target time [k]. / M ³ ). T is a time unit (for example, h: hour) of the optimization target time.

  In the above formula (3), the formula for calculating the specific enthalpy h relating to the calculation of the specific enthalpy h1 [k] of the supply air and the specific enthalpy h2 [k] of the outside air is given by the following formula (4).

In the above formula (4), Ca is the specific gravity of air (kg / m ³ ), Cpa is the constant pressure specific heat of air (kJ / (kg · K)), and Cpw is the constant pressure specific heat of water vapor. (KJ / (kg · K)). R0 is the heat of evaporation of water at 0 ° (kJ / kg), T is the air temperature of the outside air or supply air (° C.), and X is the absolute humidity of the outside air or supply air (kg / kgDA). .

  In the above equation (2), the indoor CO2 concentration x1 [k] is calculated recursively by the following equation (5) using the indoor CO2 concentration x0 at the start of the optimization target time. Here, the following expression (5) is a nonlinear expression related to the optimization variable Foa [k], but by introducing “1 ÷ (Foa [k] × t + V1) as a new optimization variable, It can be calculated as a linear programming problem for x [k].

In the above equation (5), x1 [k + 1] is predicted by the indoor CO2 generation amount prediction unit 1717 in the indoor CO2 concentration (ppm = mL / m ³ ) at the optimization target time [k + 1], and C [k]. The amount of CO2 generated (mL / h) in the room during the optimization target time [k]. Further, V1 is the volume (m ³ ) of the living room 2, and X2 [k] is the outside air CO 2 concentration (ppm = mL / m ³ ) at the optimization target time [k] predicted by the outside air CO 2 concentration prediction unit 1716. ).

  The outside air processing energy optimization unit 1720 stops derivation of the outside air introduction amount Foa [k] during times other than the optimization target time and the peak shift time, and instead of the indoor CO 2 concentration x1 [k] The upper limit value of the density is output.

  Here, the outside air introduction amount Foa [k] and the outside air introduction amount Foa [k] derived from the above equations are conditions for minimizing the outside air processing energy in the optimization target time (peak shift time). . Therefore, by rotating the fan of the air supply fan 12 with the air volume according to this condition, the outside air processing energy in the optimization target time can be minimized.

  The optimum outside air introduction amount output unit 1721 outputs the outside air introduction amount Foa [k] derived by the outside air processing energy optimization unit 1720 based on the above formula (2) to the outside air introduction amount control unit 16 as the outside air introduction amount setting. . The optimum CO2 concentration setting output unit 1722 also supplies the outside air introduction amount Foa [k] derived by the outside air processing energy optimization unit 1720 based on the above equation (5) to the outside air introduction amount control unit 16 as the indoor CO2 concentration setting. Output.

  Here, the optimum outside air introduction amount output unit 1721 and the optimum CO2 concentration setting output unit 1722 are based on the time counted by a time measuring unit (not shown) such as an RTC, or the outside air introduction amount setting or the indoor CO2 corresponding to this time. The concentration setting is output to the outside air introduction amount control unit 16. As described above, since either one of the outside air introduction amount Foa [k] and the indoor CO2 concentration setting needs to be output to the outside air introduction amount control unit 16, the optimum outside air introduction amount output unit 1721 and the optimum CO2 are output. An exclusive configuration in which only one of the density setting output units 1722 operates may be employed.

  The error correction unit 1723 includes a current room CO2 generation amount calculated by the room CO2 generation amount calculation unit 1718 during the optimization target time and the peak shift time, and a room CO2 generation amount prediction unit 1717 for the current time. The predicted amount of CO2 generated in the room is compared to determine whether the difference between the two values is within a predetermined threshold. When the error correction unit 1723 determines that the difference between the two values exceeds the threshold value, the error correction unit 1723 operates the living room CO2 generation amount prediction unit 1717 to newly calculate a predicted value, and uses the new predicted value to perform the outside air processing. The energy optimization unit 1720 is operated.

  The target of the error determination is not limited to the predicted value of the indoor CO2 generation amount predicting unit 1717, but the predicted value of the specific enthalpy predicting unit 1715 and the outside air CO2 concentration predicting unit 1716 can be processed in the same manner. For example, if the difference between the predicted value of the outside air CO2 concentration predicting unit 1716 and the actual value of the outside air CO2 concentration sensor 13 exceeds a predetermined threshold, the outside air CO2 concentration predicting unit 1716 is made to calculate a new predicted value. It is good also as a form. In addition, when the difference between the specific measured enthalpy of the outside air and the specific enthalpy of the supply air, which is a predicted value of the specific enthalpy predicting unit 1715, or a corresponding measured value exceeds a predetermined threshold, the difference A prediction value in which (error) has occurred may be newly calculated by the specific enthalpy prediction unit 1715.

  Note that the current enthalpy of the outside air and the specific enthalpy of the supply air to be compared are calculated by the error correcting unit 1723 from the current outside air and the state of the air in the living room 2 using the above equation (4) and the like. It shall be. In addition, when the difference between the measured value for one predicted value exceeds a predetermined threshold value, the predicted enthalpy predicting unit 1715, the outdoor air CO2 concentration predicting unit 1716, and the indoor CO2 generation amount predicting unit 1717 all regenerate the predicted value. It is good also as a form which performs calculation.

  Hereinafter, the operation of the outside air introduction amount optimization unit 17 described above will be described with reference to FIG. Here, FIG. 6 is a flowchart illustrating an example of an outside air introduction amount optimization process executed by the outside air introduction amount optimization unit 17.

  First, the peak shift time setting input unit 1719 receives an input of the peak shift time via an input device (not shown) (step S11). If no peak shift time is input, the peak shift time is not set, and the process proceeds to step S12.

  The specific enthalpy prediction unit 1715, the outdoor air CO2 concentration prediction unit 1716, and the indoor CO2 generation amount prediction unit 1717 calculate the predicted values (specific enthalpy of outdoor air / supply air, outdoor CO2 concentration, and indoor CO2 generation amount) in the optimization target time. Each is calculated (step S12).

  Subsequently, the outside air processing energy optimization unit 1720 calculates the outside air introduction amount or the indoor CO2 concentration that minimizes the outside air processing energy, using each predicted value calculated in step S12 (step S13). Here, the outside air processing energy optimization unit 1720 determines whether or not the current time corresponds to the peak shift time input in step S11, based on the time counted by a timing unit (not shown) (step S14).

  Here, when it is determined that the peak shift time is outside (step S14; No), the outside air processing energy optimization unit 1720 sets w [k] in the above equation (2) to “1” (step S15), and step The process proceeds to S17. Further, when it is determined that the peak shift time is reached (step S14; Yes), the outside air processing energy optimization unit 1720 sets w [k] in the above equation (2) to a predetermined value larger than “1” (step S16). ), The process proceeds to step S17.

  Subsequently, the optimum outside air introduction amount output unit 1721 and the optimum CO2 concentration setting output unit 1722 set the outside air introduction amount Foa [k] or the indoor CO2 concentration setting according to this time based on the time measured by the time measuring unit (not shown). Then, it outputs to the outside air introduction amount control unit 16 (step S17).

  Next, the error correction unit 1723 compares the predicted value used for optimization with the current measured value, and determines whether or not the error is within a predetermined threshold (step S18). If it is determined that the error exceeds the threshold (step S18; No), the outside air processing energy optimization unit 1720 returns to step S12 again to newly calculate a predicted value.

  If it is determined in step S18 that the error is within the threshold value (step S18; Yes), the outside air processing energy optimization unit 1720 determines whether or not the optimization target time has ended based on the time measured by a timing unit (not shown). Is determined (step S19). Here, when it is determined that the optimization target time is being reached (step S19; No), the process returns to step S14 again. If it is determined in step S19 that the optimization target time has ended (step S19; Yes), the outside air processing energy optimization unit 1720 enters a mode in which the outside air introduction amount is controlled based on the upper limit value of the indoor CO2 concentration. The change is made (step S20), and the process ends.

  Hereinafter, with reference to FIG. 7 and FIG. 8, an example of a processing result by the outside air introduction amount optimization processing will be described.

  FIG. 7 is a diagram illustrating an example of a temporal transition of the outside air introduction amount by the outside air introduction amount optimization process. Moreover, FIG. 8 is a figure which shows an example of the time transition of the indoor CO2 density | concentration by the said outside air introduction amount optimization process, and respond | corresponds with each time of FIG.

In FIG. 7, the vertical axis represents the outside air introduction amount (m ³ / h), and the horizontal axis represents time (1 o'clock to 24 o'clock). In FIG. 8, the vertical axis represents the CO2 concentration (ppm) in the room, and the horizontal axis represents the time (1 o'clock to 24:00). 7 and 8, the optimization target time is 1 o'clock to 24 o'clock. In addition, the upper limit value of the CO2 concentration in the living room is 1000 (ppm).

  In FIG. 7, the outside air introduction amount L21 represents the outside air introduction amount when the peak shift time is not set (hereinafter referred to as normal optimization). Further, the outside air introduction amount L22 represents the outside air introduction amount when 10 o'clock to 11 o'clock is set as the peak shift time. In FIG. 8, the indoor CO2 concentration L31 represents the amount of outside air introduced when the peak shift time is not set. The living room CO2 concentration L32 represents the amount of outside air introduced when 10:00 to 11:00 is set as the peak shift time.

  Here, when the outside air introduction amount L21 and the outside air introduction amount L22 are compared, the outside air introduction amount L21 has a peak of the outside air introduction amount around 11:00, whereas the outside air introduction amount L22 has the outside air peak shift time. It rises steeply from around 7 o'clock prior to 9:00 and reaches its peak at around 9 o'clock. In addition, referring to the indoor CO2 concentration of the living room 2, the indoor CO2 concentration L31 corresponding to the outdoor air introduction amount L21 has an early peak in the outdoor air introduction amount in the indoor CO2 concentration L32 corresponding to the outdoor air introduction amount L22. Changes more slowly. And in any of indoor CO2 density | concentration L31 and indoor CO2 density | concentration L32, it changes, without exceeding upper limit 1000ppm.

  As described above, by executing the above-described outside air introduction amount optimization processing, the energy required for the outside air processing in the optimization target time can be minimized (optimized). Further, in the peak shift time set by the peak shift time setting input unit 1719, the energy peak in this peak shift time can be efficiently transferred to another time zone.

  Returning to FIG. 1, the return air processing unit 20 has a fan and a coil (both not shown) as in the outside air processing unit 10, and at least one of the temperature and humidity of the return air taken in by the fan operating. Adjust one using cold or hot water. In addition, the return air processing unit 20 blows the adjusted return air to the air supply unit 30 through the duct 40. The return air processing unit 20 may be configured such that a fan and a coil are packaged and arranged in the living room 2. In this case, the return air processing unit 20 directly takes in the air in the living room 2 and passes through the duct 40. The air supply is blown into the room 2 without.

  In the air supply unit 30, air mixed with the outside air blown from the outside air processing unit 10 and the return air blown from the return air processing unit 20 is taken in via the duct 40, and the taken-in air is stored in the living room 2. It is supplied inside.

  As described above, according to the air conditioning control device 1 of the present embodiment, the influence of the state of the outside air during the optimization target time is predicted, and the energy required for the outside air processing calculated based on the predicted value is minimized (optimization). The air supply fan 12 can be operated at the number of rotations corresponding to the conditions (outside air introduction amount setting, indoor CO2 concentration setting). This minimizes (optimizes) the energy required for the outside air processing during the optimization target time, and thus efficiently reduces the energy required for the outside air processing from the viewpoint of the integrated value through the optimization target time. be able to. In addition, in the peak shift time within the optimization target time, the energy peak at the peak shift time can be efficiently transferred to another time zone, so that the peak shift that reduces the energy in the peak time zone can be performed. realizable.

  As mentioned above, although embodiment of this invention was described, the said embodiment was shown as an example and is not intending limiting the range of invention. The above embodiment can be implemented in various other forms, and various omissions, replacements, changes, additions, and the like can be made without departing from the scope of the invention. Moreover, the said embodiment and its deformation | transformation are included in the range of the invention, the summary, and the invention described in the claim, and its equal range.

  For example, in the above-described embodiment, the outside air processing unit 10 and the return air processing unit 20 are configured separately. However, the configuration is not limited thereto, and may be integrated as shown in FIG.

  Here, FIG. 9 is a diagram illustrating another configuration example of the air conditioning control device 1. In the configuration shown in FIG. 9, an outside air / return air processing unit 50 is provided instead of the outside air processing unit 10 and the return air processing unit 20. In addition, about the component similar to FIG. 1, the same code | symbol is provided and description is abbreviate | omitted.

  In the outside air / return air processing unit 50, the outside air / return air mixing unit 18 includes a mechanism such as a damper (not shown) that adjusts the mixing ratio of the outside air and the return air, and the outside air is returned based on the opening degree of the damper. And return air. The air mixed in the outside air / return air mixing unit 18 is adjusted to at least one of temperature and humidity with cold water or hot water by the outside air coil 14, and is blown to the air supply unit 30 by the air supply fan 12. Further, in this configuration, the outside air introduction amount control unit 16 allows the outside air / return air so that the outside air amount measured by the air amount sensor 15 is equal to the outside air introduction amount setting calculated by the outside air introduction amount optimization unit 17. The damper opening degree of the mixing unit 18 is controlled. In addition, the outside air introduction amount control unit 16 adjusts the outside air / return air so that the CO 2 concentration of the exhaust gas or the return air measured by the CO 2 concentration sensor 11 becomes equal to the CO 2 concentration setting calculated by the outside air introduction amount optimization unit 17. The damper opening degree of the mixing unit 18 may be controlled.

  Moreover, although the said embodiment demonstrated the structure with which the external air introduction | transduction quantity optimization part 17 was equipped with the external air process part 10 attached to the living room 2, it is not restricted to this, For example, as shown in FIG. It is good also as a structure with which the external apparatus which exists outside 10 is provided.

  Here, FIG. 10 is a diagram schematically showing the configuration of the building management system 3. In the building management system 3, each living room 2 in the building is a target of air conditioning control, and an air conditioning control device 1 </ b> A is installed for each living room 2. Here, the air conditioning control device 1A is obtained by removing the outside air introduction amount optimization unit 17, and the outside air introduction amount control unit 16 of the air conditioning control device 1A sets the outside air introduction amount input from the central monitoring device 60 or Based on the indoor CO2 concentration setting, the set value of the rotational speed of the air supply fan 12 is controlled (none is shown).

  The central monitoring device 60 is a server device or the like that manages the outside air processing unit 10A in the building management system 3, and each air conditioning control device 1A (outside air processing unit 10) via a network N1 such as a LAN (Local Area Network). ) To be able to communicate. Here, the central monitoring device 60 includes the outside air introduction amount optimization unit 17 and sets the outside air introduction amount or the indoor CO2 concentration based on the state values of the outside air and the air in the living room 2 measured by each air conditioning control device 1A. The setting is calculated individually and input to the outside air introduction amount control unit 16 of the corresponding air conditioning control device 1A via the network N1. Thereby, since air-conditioning control of each living room 2 can be performed similarly to the said embodiment, each living room 2 can be centrally managed by the one outdoor air introduction amount optimization part 17. FIG.

  In the case of the configuration of FIG. 10, the sensor cost can be reduced by providing one outside air CO2 concentration sensor 13 provided in each of the air conditioning control devices 1 </ b> A in the entire building. The outside air introduction amount optimizing unit 17 may be provided not in the central monitoring device 60 but in the external server 70 connected to the central monitoring device 60 via the network N2 such as the Internet. In this case, the external server 70 may be configured to provide the function of the outside air introduction amount optimization unit 17 to the central monitoring device 60 as a service (for example, a Web service).

  In addition, the program executed by the outside air processing unit 10 (outside air introduction amount optimization unit 17) of the above embodiment is provided by being incorporated in advance in a storage medium (ROM or storage unit) included in each device. Not limited to this, files in installable or executable formats are recorded on a computer-readable recording medium such as a CD-ROM, flexible disk (FD), CD-R, DVD (Digital Versatile Disk), etc. You may comprise. Furthermore, the storage medium is not limited to a medium independent of a computer or an embedded system, but also includes a storage medium in which a program transmitted via a LAN, the Internet, or the like is downloaded and stored or temporarily stored.

  In addition, the program executed by the outside air processing unit 10 (outside air introduction amount optimization unit 17) of the above embodiment is stored on a computer connected to a network such as the Internet, and is provided by being downloaded via the network. You may comprise, and you may comprise so that it may provide or distribute via networks, such as the internet.

DESCRIPTION OF SYMBOLS 1, 1A Air-conditioning control apparatus 2 Living room 3 Building management system 10 Outside air processing part 11 CO2 concentration sensor 12 Supply air fan 13 Outside air CO2 density sensor 14 Outside air coil 15 Air volume sensor 16 Outside air introduction amount control part 161, 162 Subtractor 163, 164, 168 Filter unit 165, 166 PID controller 167 Adder 17 Outside air introduction amount optimization unit 1711 Storage unit 1712 Display unit 1713 Outside air information acquisition unit 1714 Residential room information acquisition unit 1715 Specific enthalpy prediction unit 1716 Outside air CO2 concentration prediction unit 1717 Indoor CO2 generation amount prediction unit 1718 Indoor CO2 generation amount calculation unit 1719 Peak shift time setting input unit 1720 Outside air processing energy optimization unit 1721 Optimal outside air introduction amount output unit 1722 Optimal CO2 concentration setting output unit 1723 Error correction unit 18 Outside air Return air mixing section 20 the return air processing unit 30 supply unit 31 indoor CO2 concentration sensor 40 duct 50 ambient air, return air processing unit 60 the central monitoring unit 70 external server N1, N2 Network

Claims (9)

In an air- conditioning control apparatus for controlling an air- conditioning system having an air supply fan that takes in outside air having an air volume corresponding to the number of rotations of the fan into an outside air coil and adjusts temperature or humidity and blows the outside air into a room to be air- conditioned. ,
At a given time come to Masaru, the predicted value of the enthalpy and the carbon dioxide concentration of the ambient air, the indoor emission amount of carbon dioxide and the air supply fan is based on the predicted value of the enthalpy of the air supply to be supplied to the chamber, the predetermined An outside air introduction amount optimizing means for calculating an air volume of the outside air in which the outside air processing energy required for the indoor air conditioning process in time is minimum and the indoor carbon dioxide concentration is a predetermined value or less ;
Volume of air blown into the chamber, the so that such a the calculated air volume in the outside air introduction amount optimizing means, and the outside air introducing amount control means for controlling the rotational speed of the air supply fan,
An air conditioning control device. The outside air introduction amount optimization means includes:
First prediction means for predicting the enthalpy and carbon dioxide concentration of the outside air at the predetermined time ;
Second prediction means for predicting the amount of carbon dioxide generated in the room during the predetermined time and the enthalpy of supply air supplied to the room by the supply fan ;
The outside air processing energy optimization means the first on the basis of the prediction value of the prediction means and said second prediction means, for calculating the air amount before Kigaiki,
The air conditioning control device according to claim 1. The outside air processing energy optimization means calculates the amount of outside air introduced into the room as the condition relating to the air volume of the outside air or the carbon dioxide concentration in the room when the air supply fan is operated with the amount of air introduced. And
The outside air introduction amount control means is an introduction amount of the outside air into the room calculated by the outside air processing energy optimization means or a carbon dioxide concentration in the room when the supply air fan is operated with the introduction amount. The air conditioning control device according to claim 2 , wherein the rotation speed of the air supply fan is controlled according to the above . The outside air introduction amount optimizing means further includes a setting input means for accepting designation of a specific time zone that is a peak shift time of the predetermined time ,
The air conditioning according to claim 2 or 3 , wherein the outside air processing energy optimization means shifts the peak of the outside air processing energy during the peak shift time in the predetermined time to a time zone other than the peak shift time. Control device. An indoor condition sensor for measuring the indoor air condition;
The outside air introduction amount control means, when said chamber condition sensor in said chamber being measured air in the state exceeds a predetermined specified value, according to claim 2 in which the rotational speed of the air supply fan is controlled so as to increase Air conditioning control device. The outside air introduction amount optimization means has a predetermined difference between the indoor air state measured by the indoor state sensor and the indoor air state indicated by a predicted value of the second prediction means at the time of the measurement. The air conditioning control device according to claim 5 , further comprising error correction means for executing prediction by the second prediction means when the threshold value of the second prediction means is exceeded. An outside air state sensor for measuring the outside air state before the adjustment;
When the difference between the outside air state measured by the outside air state sensor and the outside air state indicated by the predicted value of the first prediction unit at the time of measurement exceeds a predetermined threshold, the error correcting unit Causing prediction by the first prediction means to be executed;
The air conditioning control device according to claim 6 . The outside air introduction amount optimization means, any one of claims 1 to 7 provided in the monitoring system or an external device communicably connected with the monitoring system of a building comprising a plurality of said chamber comprising an air conditioning control target The air conditioning control device according to item. An air conditioning control method for an air conditioning system having an air supply fan that takes in outside air having an air volume according to the number of rotations of a fan into an outside air coil, adjusts temperature or humidity, and blows the outside air into a room subject to air conditioning control. ,
At a given time come to Masaru, the predicted value of the enthalpy and the carbon dioxide concentration of the ambient air, the indoor emission amount of carbon dioxide and the air supply fan is based on the predicted value of the enthalpy of the air supply to be supplied to the chamber, the Calculating the air volume of the outside air in which the outside air processing energy required for the indoor air conditioning processing in a predetermined time is minimum and the carbon dioxide concentration in the room is equal to or less than a predetermined value ;
Air volume blown before Symbol chamber, the calculated air volume as a so that in the outside air introduction amount optimization means, for controlling the rotational speed of the air supply fan,
An air conditioning control method.

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