Variable air volume air conditioning system and air conditioning control method

Abstract

The present application provides a kind of variable air volume air conditioning system and air conditioning control method, can reduce the number of times of increasing correction of fan speed, realize energy saving, save cost.The variable air volume air conditioning system of the present application includes: variable air volume controller (2), according to the opening of the damper of variable air volume unit (1), send out static pressure excess and deficiency information according to each variable air volume unit;Again determination unit (61), before the static pressure excess and deficiency information of each variable air volume unit (1) is integrated, according to the indoor temperature or indoor CO2 concentration of controlled area to carry out the re-determination of static pressure excess and deficiency information;And static pressure excess and deficiency information changing unit (62), before the static pressure excess and deficiency information of each variable air volume unit (1) is integrated, according to the determination result of re-determination unit (1) to change the static pressure excess and deficiency information of each variable air volume unit (1).

Description

TECHNICAL FIELD

[0001] The present application relates to a variable air volume air conditioning system that changes the air supply amount according to the variation of the thermal load of an indoor space, thereby adjusting the cooling / heating capacity, and more particularly to a variable air volume air conditioning system and an air conditioning control method. BACKGROUND

[0002] Conventionally, in a variable air volume (VAV) air conditioning system, a variable air supply amount adjustment unit (VAV unit) is provided for each controlled region, and the air supply amount from the VAV unit is controlled by a VAV controller according to the load condition of the controlled region (see Patent Document 1).

[0003] In the variable air volume control in the VAV air conditioning system, an inverter type air conditioner that can control the air volume (fan speed) according to the required air volume of each VAV unit is used. The fan speed is proportional to the inverter frequency.

[0004] The fan speed F of the air conditioner can be obtained according to the total required air volume Σvi obtained by summing the required air volume vi of each VAV unit, by the following equation (1). Figure 15

[0005] F = a x Σvi + b (where Vmin ≦ Σvi ≦ Vmax)...(1)

[0006] F = Fmin (Σvi < Vmin)...(2)

[0007] F = Fmax (Σvi > Vmax)...(3)

[0008] a and b in equation (1) are constants that are predetermined. Equation (2) indicates that in the case where the total required air volume Σvi is less than the lower limit value Vmin, the fan speed F is limited to the lower limit value Fmin. Equation (3) indicates that in the case where the total required air volume Σvi is greater than the upper limit value Vmax, the fan speed F is limited to the upper limit value Fmax.

[0009] In addition, in the VAV air conditioning system, the total static pressure excess / deficiency information is created according to the static pressure excess / deficiency information (state) sent from the VAV controller that controls each VAV unit, and the fan speed F is increased / decreased corrected according to the total static pressure excess / deficiency information.

[0010] ​Each VAV controller outputs any one of "static pressure deficiency", "normal", "static pressure excess" according to the opening degree of the damper of the VAV unit controlled by the respective VAV controller. The air conditioning control device sets the total static pressure excess / deficiency information to "static pressure deficiency" even if there is one "static pressure deficiency" among the static pressure excess / deficiency information sent from the respective VAV controllers. The air conditioning control device sets the total static pressure excess / deficiency information to "normal" in the case where "normal" and "static pressure excess" are mixed in the static pressure excess / deficiency information sent from the respective VAV controllers. The air conditioning control device sets the total static pressure excess / deficiency information to "static pressure excess" in the case where "static pressure excess" is sent from all the respective VAV controllers.

[0011] In the case where the total static pressure excess / deficiency information is "static pressure deficiency", the air conditioning control device performs α% increase correction of the fan speed F of the air conditioner (α is a predetermined value). In the case where the total static pressure excess / deficiency information is "normal", the air conditioning control device maintains the fan speed F as it is. In the case where the total static pressure excess / deficiency information is "static pressure excess", the air conditioning control device performs α% decrease correction of the fan speed F.

[0012] Next, problems of the related art will be described.

[0013] [First Problem]

[0014] Each VAV controller calculates the required air volume based on the indoor temperature and the indoor temperature set value as shown in FIG. 6. In the example of FIG. 6, in the case of cooling, in the case where the indoor temperature is higher than the indoor temperature set value at the time of cooling, the required air volume increases according to the characteristics of the VAV control shown in FIG. 6, and in the case where the indoor temperature is lower than the indoor temperature set value at the time of cooling, the required air volume becomes the minimum air volume. In the case of heating, in the case where the indoor temperature is lower than the indoor temperature set value at the time of heating, the required air volume increases according to the characteristics of the VAV control shown in FIG. 6, and in the case where the indoor temperature is higher than the indoor temperature set value at the time of heating, the required air volume becomes the minimum air volume. Figure 16 Figure 16 The VAV controller controls the opening degree of the damper in the VAV unit in such a manner as to ensure the determined required air volume. Specifically, the VAV controller receives feedback of the measured air volume measured by the air volume sensor in the VAV unit, and controls the damper opening degree in such a manner that the required air volume and the measured air volume become equal. Figure 16 Figure 16 Each VAV controller outputs any one of "static pressure deficiency", "normal", "static pressure excess" according to the opening degree of the damper of the VAV unit controlled by the respective VAV controller, but even in the case where the static pressure excess / deficiency information is "static pressure deficiency", the indoor temperature is sometimes good (the absolute value of the difference between the indoor temperature set value and the indoor temperature is within Δ°C).

[0015]

[0016] Figure 17 ​​​​An example of the case where the indoor temperature is PV is shown in FIG. 1. Figure 17 An example of the case where the indoor temperature is PV is shown in FIG. 1.

[0017] The cause of the problem that the indoor temperature is good (the absolute value of the difference between the indoor temperature set value and the indoor temperature is within Δ°C) but the static pressure is insufficient is that the measured air volume does not reach the required air volume even though the indoor temperature is good, that is, the required air volume is small. As a cause of the measured air volume not reaching the required air volume, it is considered that the fan speed is insufficient, or the air volume to the target VAV unit is insufficient because the required air volume of another VAV unit is large. As a result, even though the indoor temperature is good, the total static pressure excess / deficiency information becomes "static pressure insufficient", the fan speed is corrected to increase, and thus there is a problem that the energy consumption increases and the cost rises.

[0018] [Second Problem]

[0019] In addition, compared to a comfortable temperature (for example, 25°C to 27°C in summer), an excessive temperature setting (for example, the indoor temperature set value is 20°C) is often performed, and thus there is a case where the required air volume of the VAV unit is always the maximum air volume. Figure 18 At this time, the static pressure excess / deficiency information of "static pressure insufficient" is continuously output, and thus there is a problem that the fan speed is continuously corrected to increase.

[0020] [Related Art Documents]

[0021] [Patent Documents]

[0022] [Patent Document 1] Japanese Patent No. 3334069 SUMMARY

[0023] [Problems to be Solved by the Invention]

[0024] The present application has been made to solve the above problems, and has an object to provide a VAV air conditioning system and an air conditioning control method capable of reducing the number of times of increasing correction of the fan speed, and achieving energy saving and cost reduction.

[0025] [Means of Solving the Problems]

[0026] The VAV air conditioning system of the present application is characterized by comprising: an air conditioning machine; VAV units provided per controlled zone; a first control section configured to control the opening degree of a damper of the VAV units per controlled zone based on a required air volume determined based on the load condition of the controlled zone; a state notification section configured to send out static pressure excess / deficiency information per VAV unit based on the opening degree of the damper; a fan speed determination section configured to determine the fan speed of the air conditioning machine based on the total required air volume obtained by totaling the required air volume of each VAV unit; a fan speed correction section configured to correct the fan speed of the air conditioning machine based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of each VAV unit; a second control section configured to control the fan of the air conditioning machine so as to become the fan speed determined by the fan speed determination section and corrected by the fan speed correction section; a re-determination section configured to perform re-determination of the static pressure excess / deficiency information based on the indoor temperature or the indoor CO2 concentration of the controlled zone before the static pressure excess / deficiency information of each VAV unit is integrated; and a static pressure excess / deficiency information change section configured to change the static pressure excess / deficiency information of each VAV unit based on the determination result of the re-determination section before the static pressure excess / deficiency information of each VAV unit is integrated.

[0027] Further, the configuration example of the VAV air conditioning system of the present application is characterized in that, for the VAV unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the re-determination section determines that it should be changed from static pressure deficiency to reasonable in the case where the indoor temperature of the corresponding controlled zone is within an allowable temperature zone.

[0028] Further, the configuration example of the VAV air conditioning system of the present application is characterized in that the allowable temperature zone includes a first allowable temperature zone which is a zone in which the difference between the indoor temperature of the controlled zone and the indoor temperature set value is negative infinite to positive first prescribed temperature at the time of cooling and is negative first prescribed temperature to infinite at the time of heating, and a second allowable temperature zone which is a zone in which the indoor temperature of the controlled zone is negative infinite to positive second prescribed temperature at the time of cooling and is positive third prescribed temperature to infinite at the time of heating, and for the VAV unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the re-determination section determines that it should be changed from static pressure deficiency to reasonable in the case where the indoor temperature of the corresponding controlled zone is within at least one of the first allowable temperature zone and the second allowable temperature zone.

[0029] Further, a configuration example of the VAV air conditioning system of the present application is characterized in that, for the VAV unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the rejudgment section judges that the change from static pressure deficiency to reasonableness should be made in a case where the difference between the indoor CO2 concentration of the corresponding controlled region and the indoor CO2 concentration set value is within a region from negative infinity to a positive prescribed concentration.

[0030] Further, a configuration example of the VAV air conditioning system of the present application is characterized in that it further includes an indoor temperature prediction section configured to predict the indoor temperature at a future time for each controlled region, and for the VAV unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the rejudgment section judges that the change from static pressure deficiency to reasonableness should be made in a case where at least one of the indoor temperature of the corresponding controlled region and the indoor temperature prediction value is within an allowable temperature region.

[0031] Further, a configuration example of the VAV air conditioning system of the present application is characterized in that the allowable temperature region includes a first allowable temperature region that is a region in which the difference between the indoor temperature of the controlled region and the indoor temperature set value is within a region from negative infinity to a positive first prescribed temperature in cooling and from negative first prescribed temperature to infinity in heating, and a second allowable temperature region that is a region in which the indoor temperature of the controlled region is within a region from negative infinity to a positive second prescribed temperature in cooling and from positive third prescribed temperature to infinity in heating, and for the VAV unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the rejudgment section judges that the change from static pressure deficiency to reasonableness should be made in a case where at least one of the indoor temperature of the corresponding controlled region and the indoor temperature prediction value is within at least one of the first allowable temperature region and the second allowable temperature region.

[0032] Further, a configuration example of the VAV air conditioning system of the present application is characterized in that, for the VAV unit for which the static pressure excess / deficiency information indicates reasonableness, the rejudgment section judges that the change from reasonableness to static pressure deficiency should be made in a case where the indoor temperature prediction value of the corresponding controlled region is outside the allowable temperature region.

[0033] Further, a configuration example of the VAV air conditioning system of the present application is characterized in that it further includes an indoor CO2 concentration prediction section configured to predict the indoor CO2 concentration at a future time for each controlled region, and for the VAV unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the rejudgment section judges that the change from static pressure deficiency to reasonableness should be made in a case where the difference between the indoor CO2 concentration or the indoor CO2 concentration prediction value of the corresponding controlled region and the indoor CO2 concentration set value is within a region from negative infinity to a positive prescribed concentration.

[0034] Further, the VAV air conditioning system according to the present application is characterized in that, for the VAV unit for which the static pressure excess / deficiency information indicates that the VAV unit is reasonable, the rejudgment section judges that the VAV unit should be changed from reasonable to static pressure deficiency in a case where the difference between the predicted value of the indoor CO2 concentration in the corresponding controlled zone and the set value of the indoor CO2 concentration is outside the range from negative infinite to positive prescribed concentration.

[0035] Further, the air conditioning control method according to the present application is characterized by comprising: a first step of controlling the opening degree of the damper of the VAV unit for each controlled zone based on a required air volume determined based on the load condition of the controlled zone; a second step of sending static pressure excess / deficiency information for each VAV unit based on the opening degree of the damper; a third step of determining the rotation speed of the fan of an air conditioning device that supplies supply air to the VAV units based on the total required air volume obtained by summing the required air volume of each VAV unit; a fourth step of correcting the rotation speed of the fan of the air conditioning device based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of each VAV unit; a fifth step of controlling the fan of the air conditioning device so as to have the rotation speed determined in the third step and corrected in the fourth step; a sixth step of performing rejudgment of the static pressure excess / deficiency information based on the indoor temperature or the indoor CO2 concentration of the controlled zone before the static pressure excess / deficiency information of each VAV unit is integrated; and a seventh step of changing the static pressure excess / deficiency information of each VAV unit based on the result of the judgment of the sixth step before the static pressure excess / deficiency information of each VAV unit is integrated.

[0036] Further, the air conditioning control method according to the present application is characterized in that the sixth step includes a step of judging that the VAV unit should be changed from static pressure deficiency to reasonable in a case where the indoor temperature of the corresponding controlled zone is within the permissible temperature range for the VAV unit for which the static pressure excess / deficiency information indicates static pressure deficiency.

[0037] Further, the air-conditioning control method of the present application includes a sixth step of determining that a VAV unit for which the static pressure excess / deficiency information indicates a static pressure deficiency should be changed from a static pressure deficiency to a proper state, in a case where the indoor temperature of the corresponding controlled region is within at least one of a first allowable temperature region and a second allowable temperature region, the first allowable temperature region being a region in which a difference between the indoor temperature of the controlled region and an indoor temperature set value is negative infinite to positive a first prescribed temperature in cooling and is negative the first prescribed temperature to infinite in heating, the second allowable temperature region being a region in which the indoor temperature of the controlled region is negative infinite to positive a second prescribed temperature in cooling and is positive a third prescribed temperature to infinite in heating.

[0038] Further, the air-conditioning control method of the present application includes a sixth step of determining that a VAV unit for which the static pressure excess / deficiency information indicates a static pressure deficiency should be changed from a static pressure deficiency to a proper state, in a case where a difference between the indoor CO2 concentration of the corresponding controlled region and an indoor CO2 concentration set value is within a region of negative infinite to positive a prescribed concentration.

[0039] Further, the air-conditioning control method of the present application includes a sixth step of determining that a VAV unit for which the static pressure excess / deficiency information indicates a static pressure deficiency should be changed from a static pressure deficiency to a proper state, in a case where at least one of the indoor temperature of the corresponding controlled region and an indoor temperature prediction value is within an allowable temperature region.

[0040] Further, the air conditioning control method according to the present application includes a sixth step of determining that a VAV unit should be changed from static pressure deficiency to normal in the case where the static pressure excess / deficiency information indicates normal and the indoor temperature predicted value of the corresponding controlled region is outside the allowable temperature region.

[0041] Further, the air conditioning control method according to the present application includes a sixth step of determining that a VAV unit should be changed from static pressure deficiency to normal in the case where the static pressure excess / deficiency information indicates normal and the indoor temperature predicted value of the corresponding controlled region is outside the allowable temperature region.

[0042] Further, the air conditioning control method according to the present application includes a sixth step of determining that a VAV unit should be changed from static pressure deficiency to normal in the case where the static pressure excess / deficiency information indicates normal and the indoor temperature predicted value of the corresponding controlled region is outside the allowable temperature region.

[0043] Further, the air conditioning control method according to the present application includes a sixth step of determining that a VAV unit should be changed from static pressure deficiency to normal in the case where the static pressure excess / deficiency information indicates normal and the indoor temperature predicted value of the corresponding controlled region is outside the allowable temperature region.

[0044] [Effects of the Invention]

[0045] According to the present application, by providing the re-determination section and the static pressure excess / deficiency information change section, the static pressure excess / deficiency information of the static pressure deficiency can be reduced, so the number of times of the increase correction of the fan rotation speed can be reduced, thereby energy saving and cost saving can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 A graph for explaining the allowable temperature region during cooling of the present application.

[0047] Figure 2 A graph for explaining the allowable temperature region during heating of the present application.

[0048] Figure 3 A graph for explaining an example of rejudgment of the static pressure excess / deficiency information of the present application.

[0049] Figure 4 A graph for explaining another example of rejudgment of the static pressure excess / deficiency information of the present application.

[0050] Figure 5 A block diagram showing the structure of the VAV air conditioning system of the first embodiment of the present application.

[0051] Figure 6 A block diagram showing the structure of the VAV controller of the VAV air conditioning system of the first embodiment of the present application.

[0052] Figure 7 A block diagram showing the structure of the air conditioning machine of the VAV air conditioning system of the first embodiment of the present application.

[0053] Figure 8 A block diagram showing the structure of the air conditioning machine controller of the VAV air conditioning system of the first embodiment of the present application.

[0054] Figure 9 A flowchart for explaining the operation of the VAV controller of the VAV air conditioning system of the first embodiment of the present application.

[0055] Figure 10 A flowchart for explaining the operation of the air conditioning machine controller of the VAV air conditioning system of the first embodiment of the present application.

[0056] Figure 11 A flowchart for explaining the operation of the analysis device of the VAV air conditioning system of the first embodiment of the present application.

[0057] Figure 12 A block diagram showing the structure of the VAV air conditioning system of the second embodiment of the present application.

[0058] Figure 13 A flowchart for explaining the operation of the analysis device of the VAV air conditioning system of the second embodiment of the present application.

[0059] Figure 14 A block diagram showing the structure example of the computer realizing the VAV air conditioning system of the first embodiment, the second embodiment of the present application.

[0060] Figure 15Fig. 1 is a graph showing the relationship between the fan speed of the air conditioner and the total required air volume of the VAV units.

[0061] Figure 16 Fig. 2 is a graph showing a method of determining the required air volume based on the indoor temperature and the indoor temperature set value.

[0062] Figure 17 Fig. 3 is a graph showing an example in which the indoor temperature is good but the static pressure is insufficient.

[0063] Figure 18 Fig. 4 is a graph showing an example in which the static pressure is insufficient due to an excessive temperature set value.

[0064] [Explanation of Symbols]

[0065] 1: VAV unit

[0066] 2: VAV controller

[0067] 3: Air conditioner

[0068] 4: Air supply duct

[0069] 5: Air conditioner controller

[0070] 6, 6a: Analysis device

[0071] 7: Central system

[0072] 20: Required air volume calculating section

[0073] 21: Air volume control section

[0074] 22: Required air volume notification section

[0075] 23: State notification section

[0076] 24: Indoor temperature notification section

[0077] 30: Cooling coil

[0078] 31: Heating coil

[0079] 32: Fan

[0080] 50: Operation amount output section

[0081] 51: Air volume calculating section

[0082] 52: Fan speed determining section

[0083] 53: Air volume control section

[0084] 54: Information creating section

[0085] 55: Fan speed correcting section

[0086] 60: Data accumulation section

[0087] 61, 61a: rejudgment section

[0088] 62: static pressure excess / deficiency information changing section

[0089] 63: indoor temperature prediction section DETAILED DESCRIPTION

[0090] [Principle of the Invention]

[0091] In the present application, rejudgment is performed in such a manner that the static pressure excess / deficiency information is changed from "static pressure deficiency" to "reasonable" or from "reasonable" to "static pressure deficiency" based on temperature (measured value or predicted value) information. More specifically, even if a VAV unit is judged to be "static pressure deficiency", it is rejudged to be "reasonable" if the measured value of the indoor temperature is within the allowable temperature region. In addition, even if a VAV unit is judged to be "reasonable", it is rejudged to be "static pressure deficiency" if the predicted value of the indoor temperature is outside the allowable temperature region.

[0092] Here, in the present application, as the allowable temperature region, two kinds of a first allowable temperature region Al and a second allowable temperature region A2 are assumed. As to the first allowable temperature region Al, it is a region in which the difference PV-SP between the indoor temperature PV and the indoor temperature set value SP is negative infinite to Δ°C (positive first prescribed temperature) at the time of cooling, and a region in which the difference PV-SP is -Δ°C (negative first prescribed temperature) to infinite at the time of heating. The first allowable temperature region Al is used to solve the first problem.

[0093] The second allowable temperature region A2 is a region of the side of the prescribed temperature (upper limit of the reasonable indoor temperature at the time of cooling or lower limit of the reasonable indoor temperature at the time of heating) set within the range of indoor temperature (for example, 25°C to 27°C in summer, 20°C to 24°C in winter) generally considered to be comfortable, in which the energy consumption increases. The second allowable temperature region A2 is used to solve the second problem. Figure 1 Fig. 1 shows the first allowable temperature region Al and the second allowable temperature region A2 at the time of cooling, Figure 2 Fig. 2 shows the first allowable temperature region Al and the second allowable temperature region A2 at the time of heating.

[0094] Further, a region of the side in which the energy consumption decreases (the side of increasing the indoor temperature set value at the time of cooling, and the side of decreasing the indoor temperature set value at the time of heating) outside the range of temperature generally considered to be comfortable is not the second allowable temperature region A2. That is, the second allowable temperature region A2 at the time of cooling is a temperature region of negative infinite to the upper limit of the reasonable indoor temperature at the time of cooling (positive second prescribed temperature), and the second allowable temperature region A2 at the time of heating is a temperature region of the lower limit of the reasonable indoor temperature at the time of heating (positive third prescribed temperature) to infinite.

[0095] In the present application, the use of Figure 3 An example of rejudgment from "under static pressure" to "reasonable" during cooling is described. Figure 3 t1 to t8 in FIG. 10 indicate the timing at which the measured value of the indoor temperature is obtained. In addition, for the sake of simplicity of explanation, Figure 3 In FIG. 10, only the case where the allowable temperature region Al is used is illustrated.

[0096] At the timing t1 and the timing t2, the indoor temperature is outside the allowable temperature region Al, so the static pressure excess / deficiency information does not change from "under static pressure" to "reasonable". At the timing t3 to the timing t7, the indoor temperature is within the allowable temperature region Al, so the static pressure excess / deficiency information changes from "under static pressure" to "reasonable". At the timing t8, the indoor temperature is outside the allowable temperature region Al, so the rejudgment result is "under static pressure".

[0097] Thus, in the present application, the number of VAV units judged to be "under static pressure" is reduced by rejudgment, so the opportunity for the fan rotational speed to be increased is also reduced.

[0098] As the indoor temperature, a predicted value of the indoor temperature one step in the future can also be used in addition to the current value, whereby the tendency of temperature change is considered to rejudge the static pressure excess / deficiency information. In this case, as long as at least one of the measured value of the indoor temperature and the predicted value one step in the future is within the allowable temperature region, it is rejudged to be "reasonable".

[0099] In the present application, the use of Figure 4 An example of rejudgment from "under static pressure" to "reasonable" during cooling is described. Figure 4 t1 to t8 in FIG. 10 indicate the timing at which the measured value of the indoor temperature is obtained. In addition, for the sake of simplicity of explanation, Figure 4 In FIG. 10, only the case where the allowable temperature region Al is used is illustrated.

[0100] At time tl, the measured value of the indoor temperature is outside the allowable temperature region Al, so the static pressure excess / deficiency information does not change from "static pressure deficiency" to "reasonable". At time t2, the measured value of the indoor temperature is outside the allowable temperature region Al, but the predicted value is inside the allowable temperature region Al, so the static pressure excess / deficiency information changes from "static pressure deficiency" to "reasonable". At times t3 to t6, both the measured value and the predicted value of the indoor temperature are inside the allowable temperature region Al, so the static pressure excess / deficiency information changes from "static pressure deficiency" to "reasonable". At time t7, the predicted value is outside the allowable temperature region Al, but the measured value is inside the allowable temperature region Al, so the static pressure excess / deficiency information changes from "static pressure deficiency" to "reasonable". At time t8, both the measured value and the predicted value are outside the allowable temperature region Al, so the determination result is again "static pressure deficiency".

[0101] The use of the predicted value of the indoor temperature has the advantage that, as at time t2, even if the measured value of the indoor temperature is outside the allowable temperature region, when the predicted value is inside the allowable temperature region, it is determined to be "reasonable", whereby the fan rotational speed can be reduced and corrected one step earlier, so energy saving and cost reduction can be facilitated.

[0102] [First Embodiment]

[0103] Hereinafter, an embodiment of the present application will be described with reference to the drawings. Figure 5 A block diagram showing the structure of a VAV air conditioning system according to the first embodiment of the present application. The VAV air conditioning system includes VAV units 1 provided for each controlled region (air conditioning zone), which are variable air volume adjustment units that control the amount of supply air supplied to the controlled region for each controlled region, a VAV controller 2 provided for each VAV unit 1, which controls the corresponding VAV unit 1, a supply air duct 4 that supplies supply air from an air conditioner 3 to each VAV unit 1, an air conditioner controller 5 that controls the air conditioner 3, and an analysis device 6 provided in a central system 7.

[0104] Figure 6This is a block diagram illustrating the structure of the VAV controller 2. Each VAV controller 2 includes a required airflow calculation unit 20, an airflow control unit 21 (first control unit), a required airflow notification unit 22, a status notification unit 23, and an indoor temperature notification unit 24. The required airflow calculation unit 20 calculates the required airflow of the VAV unit 1 based on the deviation between the indoor temperature of the corresponding controlled area and the indoor temperature setpoint set by the occupants of the controlled area or the air conditioning system administrator. The airflow control unit 21 (first control unit) controls the opening of the air valve that adjusts the airflow output of the VAV unit 1 to ensure that the required airflow calculated by the required airflow calculation unit 20 is achieved. The required airflow notification unit 22 notifies the air conditioning controller 5 of the required airflow value. The status notification unit 23 sends static pressure overflow / deficiency information for each controlled area to the air conditioning controller 5. The indoor temperature notification unit 24 notifies the air conditioning controller 5 of the indoor temperature of the corresponding controlled area.

[0105] Figure 7 This is a block diagram illustrating the structure of air conditioner 3. Air conditioner 3 includes a cooling coil 30, a heating coil 31, and a fan 32. Furthermore, Figure 7 The structure shown is one example; of course, it could also be... Figure 7 Other than the structure.

[0106] Figure 8 This is a block diagram illustrating the structure of the air conditioner controller 5. The air conditioner controller 5 includes an operation output unit 50, an air volume calculation unit 51, a fan speed determination unit 52, an air volume control unit 53 (second control unit), an information generation unit 54, and a fan speed correction unit 55. The operation output unit 50 outputs an operation quantity for controlling the air conditioner 3 based on the deviation between the supply air temperature and the supply air temperature setpoint. The air volume calculation unit 51 calculates the total required air volume of the system based on the required air volume values ​​notified from each VAV controller 2. The fan speed determination unit 52 determines the fan speed of the air conditioner 3 based on the calculated total required air volume value. The air volume control unit 53 (second control unit) controls the fan 32 of the air conditioner 3. The information generation unit 54 generates total static pressure overflow information based on the static pressure overflow information notified from each VAV controller 2. The fan speed correction unit 55 corrects the fan speed of the air conditioner 3 based on the total static pressure overflow information.

[0107] like Figure 5As shown, the analysis device 6 includes a data accumulation unit 60, a re-determination unit 61, and a static pressure overflow / deficit information modification unit 62. The data accumulation unit 60 accumulates data on the indoor temperature, static pressure overflow / deficit information, and indoor temperature setpoint for each controlled area. Before integrating the static pressure overflow / deficit information of each VAV unit 1, the re-determination unit 61 re-determines the static pressure overflow / deficit information based on the indoor temperature of the controlled area. Before integrating the static pressure overflow / deficit information of each VAV unit 1, the static pressure overflow / deficit information modification unit 62 modifies the static pressure overflow / deficit information of each VAV unit 1 based on the determination result of the re-determination unit 61.

[0108] VAV unit 1 and VAV controller 2 are set up for each controlled area. Air cooled or heated by air conditioner 3 (supply air) is supplied to VAV unit 1 of each controlled area through air supply duct 4, and then supplied to each controlled area through VAV unit 1. VAV unit 1 is equipped with a damper (not shown) to adjust the amount of air supplied through VAV unit 1.

[0109] Next, the operation of this embodiment will be explained. Figure 9 A flowchart illustrating the operation of VAV controller 2, Figure 10 A flowchart illustrating the operation of the air conditioner controller 5.

[0110] The indoor temperature notification unit 24 of the VAV controller 2 notifies the air conditioner controller 5 of the values ​​of the indoor temperature PV and the indoor temperature setpoint SP of the corresponding controlled area, which are measured by the indoor temperature sensor. Figure 9 Step S100). Furthermore, if the indoor temperature setpoint SP is set by the air conditioning system administrator and notified from the air conditioning controller 5 to each VAV controller 2, it is not necessary to notify the air conditioning controller 5 from each VAV controller 2.

[0111] The VAV controller 2's required airflow calculation unit 20 calculates the required airflow vi of the controlled object VAV unit 1 based on the heat load condition of the corresponding controlled area. Figure 9 Step S101). Specifically, the air volume calculation unit 20 is required to calculate the required air volume vi of VAV unit 1 in a manner that the indoor temperature PV of the corresponding controlled area is consistent with the indoor temperature setpoint SP set by the occupant of the controlled area or the air conditioning system manager.

[0112] The VAV controller 2's airflow request notification unit 22 notifies the air conditioner controller 5 of the value of the required airflow vi calculated by the required airflow calculation unit 20. Figure 9 Step S102).

[0113] The air volume control section 21 of the VAV controller 2 controls the opening degree of the damper (not shown) in the controlled VAV unit 1 in such a manner as to ensure the required air volume calculated by the required air volume calculation section 20 Figure 9 Step S103).

[0114] The state notification section 23 of the VAV controller 2 sends to the air conditioner controller 5 the static pressure excess / deficiency information indicating the current cooling / heating control state of the corresponding controlled zone Figure 9 Step S104). The state notification section 23, for example, creates any one of "static pressure deficiency", "normal", and "static pressure excess" depending on the damper opening degree of the VAV unit 1.

[0115] Specifically, the state notification section 23 considers "static pressure deficiency" if the damper opening degree of the VAV unit 1 is fully open. The state notification section 23 considers "normal" if the damper opening degree of the VAV unit 1 is not fully open but is equal to or more than a prescribed opening degree (for example, 85%). The state notification section 23 considers "static pressure excess" if the damper opening degree of the VAV unit 1 is less than the prescribed opening degree.

[0116] The VAV controller 2 and the group of VAV units 1 perform the above-described steps S100 to S104 until the air conditioning is stopped every certain time interval Figure 9 Step S105).

[0117] On the other hand, the operation amount output section 50 of the air conditioner controller 5 calculates the operation amount by a prescribed control algorithm (for example, Proportional-Integral-Differential (PID)) in such a manner that the supply air temperature coincides with the supply air temperature set value and outputs it to the air conditioner 3 Figure 10 Step S200). Thus, the amount of the heating medium (cooling water or heating water) supplied to the cooling coil 30 or the heating coil 31 of the air conditioner 3 is adjusted according to the operation amount, thereby controlling the supply air temperature.

[0118] The air volume calculation section 51 of the air conditioner controller 5 calculates the total required air volume ∑vi obtained by summing the values of the required air volumes vi notified from the respective VAV controllers 2 Figure 10 Step S201).

[0119] The fan rotational speed decision section 52 of the air conditioner controller 5 decides the fan rotational speed F of the air conditioner 3 according to the value of the total required air volume ∑vi Figure 10 Step S202). The fan rotational speed decision section 52 decides the fan rotational speed F corresponding to the total required air volume ∑vi according to the relational expressions shown in the above-described equations (1) to (3).

[0120] The information generation unit 54 of the air conditioner controller 5 generates total static pressure overflow information based on the static pressure overflow information notified from each VAV controller 2, but checks whether there are any changes to the static pressure overflow information performed by the analysis device 6 as described later. Figure 10 Step S203).

[0121] Without any changes to the static pressure overflow information from the analysis device 6, the information production unit 54 directly uses the static pressure overflow information notified from each VAV controller 2 to produce the total static pressure overflow information. Figure 10 (Step S204). As before, even if there is only one "insufficient static pressure" message among the static pressure overflow / shortage information sent from each VAV controller 2, the information generation unit 54 will set the total static pressure overflow / shortage information to "insufficient static pressure". If there are both "reasonable" and "excessive static pressure" messages among the static pressure overflow / shortage information sent from each VAV controller 2, the information generation unit 54 will set the total static pressure overflow / shortage information to "reasonable". If all the static pressure overflow / shortage information sent from each VAV controller 2 is "excessive static pressure", the information generation unit 54 will set the total static pressure overflow / shortage information to "excessive static pressure".

[0122] Furthermore, if the static pressure overflow information is modified by the analysis device 6, the information production unit 54 uses the modified static pressure overflow information and the static pressure overflow information from each VAV controller 2 that was not modified by the analysis device 6 to produce total static pressure overflow information. Figure 10 (Step S205) Even if either the modified or unchanged static pressure overflow information indicates "insufficient static pressure," the information production unit 54 will set the total static pressure overflow information to "insufficient static pressure." If both the modified and unchanged static pressure overflow information contain "reasonable" and "excessive static pressure," the information production unit 54 will set the total static pressure overflow information to "reasonable." If both the modified and unchanged static pressure overflow information are "excessive static pressure," the information production unit 54 will set the total static pressure overflow information to "excessive static pressure."

[0123] The fan speed correction unit 55 of the air conditioner controller 5 corrects the fan speed F of the air conditioner 3 based on the total static pressure overflow information. Figure 10 (Step S206). As before, when the total static pressure overflow information is "insufficient static pressure," the fan speed correction unit 55 increases the fan speed F determined by the fan speed determination unit 52 by α% (α is a predetermined positive real number). When the total static pressure overflow information is "reasonable," the fan speed correction unit 55 maintains the fan speed F determined by the fan speed determination unit 52 as it is. When the total static pressure overflow information is "excessive static pressure," the fan speed correction unit 55 decreases the fan speed F determined by the fan speed determination unit 52 by α%.

[0124] The air volume control section 53 of the air conditioner controller 5 controls the blower 32 of the air conditioner 3 in such a manner as to become the blower rotation speed F decided by the blower rotation speed decision section 52 and corrected as necessary by the blower rotation speed correction section 55 (step S207). In this manner, the air volume of the supply air from the air conditioner 3 is controlled. Figure 10 The air volume control section 53 of the air conditioner controller 5 controls the blower 32 of the air conditioner 3 in such a manner as to become the blower rotation speed F decided by the blower rotation speed decision section 52 and corrected as necessary by the blower rotation speed correction section 55 (step S207). In this manner, the air volume of the supply air from the air conditioner 3 is controlled.

[0125] The air conditioner controller 5 performs the above-mentioned processing of steps S200 to S207 at regular intervals until the air conditioner is stopped (YES in step S208). Further, each air conditioner controller 5 performs the processing of steps S200 to S207 for each corresponding air conditioner 3. Thus, each air conditioner controller 5 performs the processing of steps S200 to S207 for the VAV unit 1 and the VAV controller 2 belonging to the same air conditioning system (the same air conditioner 3). Figure 10 Figure 10 The air conditioner controller 5 performs the above-mentioned processing of steps S200 to S207 at regular intervals until the air conditioner is stopped (YES in step S208). Further, each air conditioner controller 5 performs the processing of steps S200 to S207 for each corresponding air conditioner 3. Thus, each air conditioner controller 5 performs the processing of steps S200 to S207 for the VAV unit 1 and the VAV controller 2 belonging to the same air conditioning system (the same air conditioner 3). Figure 11

[0126] Figure 11 A flowchart illustrating the operation of the analysis device 6 is shown. The data accumulation section 60 of the analysis device 6 continuously acquires and accumulates the indoor temperature PV and the static pressure excess / deficiency information notified from each VAV controller 2, the indoor temperature set value SP, and the first allowable temperature region A1 and the second allowable temperature region A2 of the controlled region corresponding to each VAV unit 1 from the air conditioner controller 5 during the operation of the air conditioner (step S300). Figure 11

[0127] The re-determination section 61 of the analysis device 6 performs re-determination of the latest static pressure excess / deficiency information notified from each VAV controller 2. Specifically, the re-determination section 61 acquires the latest data accumulated in the data accumulation section 60 (step S301). Then, the re-determination section 61 extracts the static pressure excess / deficiency information of "static pressure deficiency" from the latest static pressure excess / deficiency information acquired in step S301 (step S302). Figure 11 Figure 11 Next, the re-determination section 61 performs re-determination of the static pressure excess / deficiency information of "static pressure deficiency" extracted in step S302 (step S303). Here, in order to make the explanation clear, let the VAV unit for which the latest static pressure excess / deficiency information is "static pressure deficiency" be 1-i, let the latest indoor temperature of the controlled region corresponding to the VAV unit 1-i be PV1, let the indoor temperature set value be SP1, let the first allowable temperature region of the controlled region corresponding to the VAV unit 1-i be A1i, and let the second allowable temperature region be A2i.

[0128] Next, the re-determination section 61 performs re-determination of the static pressure excess / deficiency information of "static pressure deficiency" extracted in step S302 (step S303). Here, in order to make the explanation clear, let the VAV unit for which the latest static pressure excess / deficiency information is "static pressure deficiency" be 1-i, let the latest indoor temperature of the controlled region corresponding to the VAV unit 1-i be PV1, let the indoor temperature set value be SP1, let the first allowable temperature region of the controlled region corresponding to the VAV unit 1-i be A1i, and let the second allowable temperature region be A2i. Figure 11

[0129] ​​​​​The re-determination unit 61 sets a first permissible temperature zone A1i and a second permissible temperature zone A2i for VAV unit 1-i with static pressure deficiency information of "insufficient static pressure" based on the indoor temperature setpoint SPi, the upper limit of the rationalized indoor temperature during cooling, and the lower limit of the rationalized indoor temperature during heating. Then, if the indoor temperature PVi falls within at least one of the first permissible temperature zone A1i and the second permissible temperature zone A2i, the re-determination unit 61 determines that the static pressure deficiency information of "insufficient static pressure" should be changed to "rational". Conversely, if the indoor temperature PVi falls outside the areas of the first permissible temperature zone A1i and the second permissible temperature zone A2i, the re-determination unit 61 determines that the static pressure deficiency information of "insufficient static pressure" should not be changed. The re-determination unit 61 performs the above-described re-determination of static pressure deficiency information for each VAV unit 1 (each controlled area) with "insufficient static pressure".

[0130] In cases where the static pressure deficiency information indicating "insufficient static pressure" is determined by the reassessment unit 61 to be more "reasonable" ( Figure 11 In step S304, the static pressure overflow / deficit information modification unit 62 of the analysis device 6 changes the information held by the air conditioner controller 5 to "reasonable". Figure 11 Step S305). Furthermore, if no static pressure overflow information is deemed more "reasonable" (no in step S304), the static pressure overflow information modification unit 62 notifies the air conditioner controller 5 of the fact that there is no change in static pressure overflow information. Figure 11 Step S306).

[0131] As described above, in the absence of any change in static pressure overflow information, the information generation unit 54 of the air conditioner controller 5 directly uses the static pressure overflow information notified from each VAV controller 2 to generate the total static pressure overflow information (step S204). Alternatively, if the static pressure overflow information has been changed, the information generation unit 54 uses the changed static pressure overflow information and the static pressure overflow information not modified by the analysis device 6 from the static pressure overflow information notified from each VAV controller 2 to generate the total static pressure overflow information (step S205).

[0132] The analysis device 6 performs the above-described steps S300 to S306 at regular intervals until the air conditioner stops. Figure 12 (Yes in step S307). Furthermore, the analysis device 6 performs analysis according to each air conditioner controller 5 (each air conditioner 3). Figure 12 The processing.

[0133] Thus, in this embodiment, static pressure overflow information of "insufficient static pressure" can be reduced, thereby reducing the number of times the fan speed needs to be increased for correction, thereby achieving energy saving and cost reduction.

[0134] [Second Embodiment]

[0135] Next, a second embodiment of the present invention will be described. Figure 13 This is a block diagram illustrating the structure of a VAV air conditioning system according to a second embodiment of the present invention. The VAV air conditioning system of this embodiment includes a VAV unit 1, a VAV controller 2, an air conditioner 3, an air duct 4, an air conditioner controller 5, and an analysis device 6a disposed within a central system 7.

[0136] The structures of VAV unit 1, VAV controller 2, air conditioner 3, and air conditioner controller 5 are the same as in the first embodiment.

[0137] like Figure 13 As shown, the analysis device 6a includes a data accumulation unit 60, a re-determination unit 61a, a static pressure overflow / deficit information change unit 62, and an indoor temperature prediction unit 63 that predicts the indoor temperature of each controlled area at a future time.

[0138] Figure 13 A flowchart illustrating the operation of the analysis device 6a is provided. During the operation of the air conditioner, the data accumulation unit 60 of the analysis device 6a continuously collects and accumulates data from the air conditioner controller 5, including indoor temperature PV and static pressure overflow / deficit information, indoor temperature setpoint SP, required airflow vi from each VAV controller 2, and supply air temperature APV. Figure 13 Step S300a).

[0139] The re-determination unit 61a of the analysis device 6a acquires the latest data accumulated in the data accumulation unit 60. Figure 13 Step S301a). The re-determination unit 61a extracts "insufficient static pressure" static pressure overflow information and "reasonable" static pressure overflow information from the latest static pressure overflow information obtained in step S301a. Figure 13 Step S302a).

[0140] On the other hand, the indoor temperature prediction unit 63 predicts the indoor temperature PV' of each controlled area one step (after a predetermined time) in the future for each controlled area. Figure 13 Step S308). The so-called indoor temperature PV' of the next step is the indoor temperature PV after the re-determination cycle from the present, and is the indoor temperature PV at the time of the next re-determination.

[0141] The indoor temperature prediction unit 63 predicts the indoor temperature PV' of the controlled zone based on the latest outdoor air temperature TO measured by an unillustrated outdoor air temperature sensor, the latest outdoor air humidity HO measured by an unillustrated outdoor air humidity sensor, the latest required air volume vi acquired in step S301a, the latest indoor temperature PV of the controlled zone acquired in step S301a, and the latest supply air temperature APV acquired in step S301a, for example, by a neural network.

[0142] A neural network is constructed in advance in the indoor temperature prediction unit 63, which is modeled based on the relationship between the outdoor air temperature TO, the outdoor air humidity HO, the required air volume vi, the supply air temperature APV, the indoor temperature PV, and the indoor temperature PV' of the next step for each controlled zone. In the neural network, the time series data of the outdoor air temperature TO, the time series data of the outdoor air humidity HO, the time series data of the required air volume vi, the time series data of the supply air temperature APV, and the time series data of the indoor temperature PV recorded during the past data collection period are used as input variables of the neural network, and the time series data of the indoor temperature PV' of the next step is used as an output variable of the neural network with respect to these input variables, so that the neural network is learned in advance in a manner that the target output variable is obtained. Further, the method of predicting the indoor temperature PV' can use a method other than the present embodiment.

[0143] Next, the re-determination unit 61a re-determines the static pressure excess / deficiency information of "static pressure deficiency" and the static pressure excess / deficiency information of "reasonable" extracted in step S302a (step S303a). Figure 13 Here, in order to make the explanation clear, the VAV unit for which the latest static pressure excess / deficiency information is "static pressure deficiency" is set to 1-i, the latest indoor temperature of the controlled zone corresponding to the VAV unit 1-i is set to PV1, the indoor temperature set value is set to SP1, the first allowable temperature zone of the controlled zone corresponding to the VAV unit 1-i is set to A1i, the second allowable temperature zone is set to A2i, and the predicted value of the indoor temperature predicted by the indoor temperature prediction unit 63 for the controlled zone corresponding to the VAV unit 1-i is set to PV1'. In addition, the VAV unit for which the latest static pressure excess / deficiency information is "reasonable" is set to 1-j, the latest indoor temperature of the controlled zone corresponding to the VAV unit 1-j is set to PVj, the indoor temperature set value is set to SPj, the first allowable temperature zone of the controlled zone corresponding to the VAV unit 1-j is set to A1j, the second allowable temperature zone is set to A2j, and the predicted value of the indoor temperature predicted by the indoor temperature prediction unit 63 for the controlled zone corresponding to the VAV unit 1-j is set to PVj'.

[0144] The rejudgment unit 61a sets the first allowable temperature region Al i and the second allowable temperature region A2i with respect to the VAV unit 1-i for which the static pressure excess / deficiency information is "static pressure deficiency" based on the indoor temperature set value SPi, the rationalized indoor temperature upper limit at the time of cooling, and the rationalized indoor temperature lower limit at the time of heating. Then, if at least one of the indoor temperature PV i and the predicted value PV i' of one step ahead is within at least one of the first allowable temperature region Al i and the second allowable temperature region A2i, the rejudgment unit 61a judges that the static pressure excess / deficiency information of "static pressure deficiency" should be changed to "rational". In addition, if the indoor temperature PV i and the predicted value PV i' of one step ahead are outside the regions of the first allowable temperature region Al i and the second allowable temperature region A2i, the rejudgment unit 61a judges that the static pressure excess / deficiency information of "static pressure deficiency" should not be changed.

[0145] In addition, the rejudgment unit 61a sets the first allowable temperature region Al j and the second allowable temperature region A2j with respect to the VAV unit 1-j for which the static pressure excess / deficiency information is "rational" based on the indoor temperature set value SPj, the rationalized indoor temperature upper limit at the time of cooling, and the rationalized indoor temperature lower limit at the time of heating. Then, if the predicted value PV j' of the indoor temperature of one step ahead is outside the regions of the first allowable temperature region Al j and the second allowable temperature region A2j, the rejudgment unit 61a judges that the static pressure excess / deficiency information of "rational" should be changed to "static pressure deficiency". Furthermore, if the predicted value PV j' of one step ahead is within at least one of the first allowable temperature region Al j and the second allowable temperature region A2j, the rejudgment unit 61a judges that the static pressure excess / deficiency information of "rational" should not be changed. The rejudgment unit 61a performs the rejudgment of the static pressure excess / deficiency information as described above for each VAV unit 1 of "static pressure deficiency" and each VAV unit 1 of "rational".

[0146] Figure 13 The processes of Step S304 to Step S306 are the same as those explained in the first embodiment. The analysis device 6a performs the processes of Step S300a to Step S302a, Step S308, Step S303a, Step S304 to Step S306 as described above every certain period until the air conditioner is stopped (YES in Step S307). Further, the analysis device 6a performs the processes of Step S300b to Step S302b, Step S308, Step S303b, Step S304 to Step S306 as described above for each air conditioner controller 5 (each air conditioner 3). Figure 11 Step S307 in the first embodiment. Figure 13 Step S307 in the first embodiment.

[0147] In the first and second embodiments, each VAV controller 2 calculates the required air volume of the VAV unit 1 in a manner that the indoor temperature of the corresponding controlled zone coincides with the indoor temperature set value, and controls the opening degree of the damper of the VAV unit 1 in a manner that ensures the required air volume. In contrast, each VAV controller 2 can calculate the required air volume of the VAV unit 1 in a manner that the indoor CO2concentration measured by the CO2sensor of the corresponding controlled zone coincides with the CO2concentration set value, and control the opening degree of the damper of the VAV unit 1 in a manner that ensures the required air volume.

[0148] In the case where such CO2concentration control is performed, only the allowable CO2concentration region Al is used as the allowable CO2concentration region. The allowable CO2concentration region Al is a region where the difference between the indoor CO2concentration and the indoor CO2concentration set value is negative from infinity to Δppm (positive specified concentration). For the VAV unit 1-i whose static pressure excess / deficiency information is "static pressure deficiency", if the indoor CO2concentration PV1is within the allowable CO2concentration region Al, the rejudgment section 61 of the first embodiment determines that the static pressure excess / deficiency information of "static pressure deficiency" should be changed to "reasonable". In addition, if the indoor CO2concentration PV1is outside the allowable CO2concentration region Al, the rejudgment section 61 determines that the static pressure excess / deficiency information of "static pressure deficiency" should not be changed. Figure 13 Step S303).

[0149] In addition, in the case where CO2concentration control is performed, an indoor CO2concentration prediction section that predicts the indoor CO2concentration at a future time for each controlled zone can be provided instead of the indoor temperature prediction section 63 of the second embodiment. As for the prediction of the CO2concentration, for example, an autoregressive model, a neural network, or the like is used.

[0150] For the VAV unit 1-i whose static pressure excess / deficiency information is "static pressure deficiency", if at least one of the indoor CO2concentration PV1and the indoor CO2concentration prediction value PV1' at one step in the future is within the allowable CO2concentration region Al, the rejudgment section 61a of the second embodiment determines that the static pressure excess / deficiency information of "static pressure deficiency" should be changed to "reasonable". In addition, if the indoor CO2concentration PV1and the indoor CO2concentration prediction value PV1' at one step in the future are outside the allowable CO2concentration region Al, the rejudgment section 61a determines that the static pressure excess / deficiency information of "static pressure deficiency" should not be changed. Figure 14 Step S303a).

[0151] Further, for the VAV unit 1-j for which the static pressure excess / deficiency information is "reasonable", if the predicted value PVi' of the indoor CO2 concentration one step in the future is outside the allowable CO2 concentration region A1j, the re-determination section 61a determines that the static pressure excess / deficiency information of "reasonable" should be changed to "static pressure deficiency". Further, if the predicted value PVi' of the indoor CO2 concentration one step in the future is within the allowable CO2 concentration region A1j, the re-determination section 61a determines that the static pressure excess / deficiency information of "reasonable" should not be changed. ​ Step S303a).

[0152] The VAV controller 2, the air conditioner controller 5, and the analysis device 6, 6a of the first embodiment and the second embodiment can each be realized by a computer including a central processing unit (CPU), a storage device, and an interface with the outside, and a program that controls these hardware resources. An example of the structure of the computer is shown in Fig. 10. ​ The computer includes a CPU 300, a storage device 301, and an interface device (I / F) 302.

[0153] In the case of the VAV controller 2, the VAV unit 1, the air conditioner controller 5, and the temperature sensor of the controlled region are connected to the I / F 302. In the case of the air conditioner controller 5, the air conditioner 3, the VAV controller 2, and the analysis device 6, 6a are connected to the I / F 302. In the case of the analysis device 6, 6a, the air conditioner controller 5 is connected to the I / F 302. The program for realizing the air conditioning control method of the present application is stored in the storage device 301. The CPU 300 of each device executes the processes explained in the first embodiment and the second embodiment according to the program stored in the storage device 301.

[0154] [Industrial applicability]

[0155] The present application can be applied to a VAV air conditioning system.

Claims

1. A variable air volume air conditioning system, characterized by, An air conditioning apparatus includes: an air conditioning apparatus; a variable air volume unit provided for each controlled zone; a first control section configured to control an opening degree of a damper of the variable air volume unit for each controlled zone based on a required air volume determined based on a load condition of the controlled zone; a state notification section configured to send out static pressure excess / deficiency information for each variable air volume unit based on the opening degree of the damper; a fan speed determination section configured to determine a fan speed of the air conditioning apparatus based on a total required air volume obtained by summing the required air volume of each variable air volume unit; a fan speed correction section configured to correct the fan speed of the air conditioning apparatus based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of each variable air volume unit; a second control section configured to control the fan of the air conditioning apparatus so as to have the fan speed determined by the fan speed determination section and corrected by the fan speed correction section; a re-determination section configured to perform re-determination of the static pressure excess / deficiency information based on an indoor temperature or an indoor CO2 concentration of the controlled zone before the static pressure excess / deficiency information of each variable air volume unit is integrated; and a static pressure excess / deficiency information change section configured to change the static pressure excess / deficiency information of each variable air volume unit based on a determination result of the re-determination section before the static pressure excess / deficiency information of each variable air volume unit is integrated, wherein, for the variable air volume unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the re-determination section determines that the static pressure deficiency should be changed to be reasonable in a case where an indoor temperature of the corresponding controlled zone is within an allowable temperature region.

2. The variable air volume air conditioning system according to claim 1, wherein the allowable temperature region includes a first allowable temperature region which is a region in which a difference between an indoor temperature of a controlled zone and an indoor temperature set value is negative infinite to positive first prescribed temperature in cooling and is negative first prescribed temperature to infinite in heating, and a second allowable temperature region which is a region in which the indoor temperature of the controlled zone is negative infinite to positive second prescribed temperature in cooling and is positive third prescribed temperature to infinite in heating, for the variable air volume unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the re-determination section determines that the static pressure deficiency should be changed to be reasonable in a case where the indoor temperature of the corresponding controlled zone is within at least one of the first allowable temperature region and the second allowable temperature region. An air conditioning apparatus includes:

3. A variable air volume air conditioning system, characterized by, an air conditioning apparatus; a variable air volume unit provided for each controlled zone; a first control section configured to control an opening degree of a damper of the variable air volume unit for each controlled zone based on a required air volume determined based on a load condition of the controlled zone; a state notification section configured to send out static pressure excess / deficiency information for each variable air volume unit based on the opening degree of the damper; ​ a fan rotation speed decision section configured to decide a fan rotation speed of the air conditioning machine based on a total required air volume obtained by adding the values of the required air volumes of the respective variable air volume units; a fan rotation speed correction section configured to correct the fan rotation speed of the air conditioning machine based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of the respective variable air volume units; a second control section configured to control the fan of the air conditioning machine in such a manner as to become the fan rotation speed decided by the fan rotation speed decision section and corrected by the fan rotation speed correction section; a re-determination section configured to perform re-determination of the static pressure excess / deficiency information of the respective variable air volume units based on the indoor temperature or the indoor CO2 concentration of the controlled region before the static pressure excess / deficiency information of the respective variable air volume units is integrated; a static pressure excess / deficiency information change section configured to change the static pressure excess / deficiency information of the respective variable air volume units based on the determination result of the re-determination section before the static pressure excess / deficiency information of the respective variable air volume units is integrated, wherein, for the variable air volume unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the re-determination section determines that the static pressure deficiency should be changed to be reasonable in the case where the difference between the indoor CO2 concentration of the corresponding controlled region and the indoor CO2 concentration set value is within the region from negative infinite to positive prescribed concentration. including:

4. A variable air volume air conditioning system characterized by, an air conditioning machine; variable air volume units provided for each controlled region; a first control section configured to control the opening degree of the damper of the variable air volume unit for each controlled region based on a required air volume decided based on the load condition of the controlled region; a state notification section configured to send out static pressure excess / deficiency information for each variable air volume unit based on the opening degree of the damper; a fan rotation speed decision section configured to decide a fan rotation speed of the air conditioning machine based on a total required air volume obtained by adding the values of the required air volumes of the respective variable air volume units; a fan rotation speed correction section configured to correct the fan rotation speed of the air conditioning machine based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of the respective variable air volume units; a second control section configured to control the fan of the air conditioning machine in such a manner as to become the fan rotation speed decided by the fan rotation speed decision section and corrected by the fan rotation speed correction section; a re-determination section configured to perform re-determination of the static pressure excess / deficiency information of the respective variable air volume units based on the indoor temperature or the indoor CO2 concentration of the controlled region before the static pressure excess / deficiency information of the respective variable air volume units is integrated; a static pressure excess / deficiency information change section configured to change the static pressure excess / deficiency information of the respective variable air volume units based on the determination result of the re-determination section before the static pressure excess / deficiency information of the respective variable air volume units is integrated; and an indoor temperature prediction section configured to predict the indoor temperature at a future time for each controlled region, for the variable air volume unit for which the static pressure excess / deficiency information indicates static pressure deficiency, the re-determination section determines that the static pressure deficiency should be changed to be reasonable in the case where at least one of the indoor temperature and the indoor temperature prediction value of the corresponding controlled region is within the allowable temperature region.

5. The variable air volume air conditioning system according to claim 4, wherein ​ The allowable temperature region includes a first allowable temperature region in which, in cooling, a difference between an indoor temperature of a controlled region and an indoor temperature set value is negative infinite to positive first prescribed temperature, and in heating, the difference is negative first prescribed temperature to infinite, and a second allowable temperature region in which, in cooling, the indoor temperature of the controlled region is negative infinite to positive second prescribed temperature, and in heating, the indoor temperature of the controlled region is positive third prescribed temperature to infinite, For the static pressure excess / deficiency information indicating a static pressure deficient variable air volume unit, the rejudgment section judges that a change from the static pressure deficient to the reasonable should be made, in a case where at least one of an indoor temperature and an indoor temperature predicted value of the corresponding controlled region is within at least one of the first allowable temperature region and the second allowable temperature region.

6. The variable air volume air conditioning system according to claim 4 or 5, wherein For the static pressure excess / deficiency information indicating a reasonable variable air volume unit, the rejudgment section judges that a change from the reasonable to the static pressure deficient should be made, in a case where an indoor temperature predicted value of the corresponding controlled region is outside the allowable temperature region.

7. A variable air volume air conditioning system characterized by, including: an air conditioning machine; a variable air volume unit provided for each controlled region; a first control section configured to control an opening degree of a damper of the variable air volume unit for each controlled region, based on a required air volume determined based on a load condition of the controlled region; a state notification section configured to send out static pressure excess / deficiency information for each variable air volume unit, based on the opening degree of the damper; a fan speed determination section configured to determine a fan speed of the air conditioning machine, based on a total required air volume obtained by totaling the required air volume of each variable air volume unit; a fan speed correction section configured to correct the fan speed of the air conditioning machine, based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of each variable air volume unit; a second control section configured to control the fan of the air conditioning machine so as to become the fan speed determined by the fan speed determination section and corrected by the fan speed correction section; a rejudgment section configured to perform rejudgment of the static pressure excess / deficiency information, based on an indoor temperature or an indoor CO2 concentration of the controlled region, before the static pressure excess / deficiency information of each variable air volume unit is integrated; a static pressure excess / deficiency information change section configured to change the static pressure excess / deficiency information of each variable air volume unit, based on a result of the judgment of the rejudgment section, before the static pressure excess / deficiency information of each variable air volume unit is integrated; and an indoor CO2 concentration prediction section configured to predict an indoor CO2 concentration at a future time for each controlled region, For the static pressure excess / deficiency information indicating a static pressure deficient variable air volume unit, the rejudgment section judges that a change from the static pressure deficient to the reasonable should be made, in a case where a difference between an indoor CO2 concentration or an indoor CO2 concentration predicted value of the corresponding controlled region and an indoor CO2 concentration set value is within a region of negative infinite to positive prescribed concentration. ​ 8. The variable air volume air conditioning system according to claim 7, characterized in that the rejudgment section judges that the static pressure shortage should be changed to the static pressure adequacy for the variable air volume unit for which the static pressure shortage information indicates the static pressure adequacy, in a case where a difference between the indoor CO2 concentration predicted value and the indoor CO2 concentration set value of the corresponding controlled zone is outside a region from negative infinity to a positive prescribed concentration.

9. An air conditioning control method characterized by, including: a first step of controlling an opening degree of a damper of a variable air volume unit for each controlled zone, according to a required air volume which is determined in accordance with a load condition of the controlled zone; a second step of sending static pressure excess / deficiency information for each variable air volume unit, in accordance with the opening degree of the damper; a third step of determining a fan rotation speed of an air conditioner which supplies supply air to the variable air volume units, in accordance with a total required air volume which is obtained by summing the required air volume of each variable air volume unit; a fourth step of correcting the fan rotation speed of the air conditioner, in accordance with total static pressure excess / deficiency information which is obtained by integrating the static pressure excess / deficiency information of each variable air volume unit; a fifth step of controlling the fan of the air conditioner at the fan rotation speed which is determined in the third step and corrected in the fourth step; a sixth step of performing rejudgment of the static pressure excess / deficiency information, in accordance with an indoor temperature or an indoor CO2 concentration of the controlled zone, before the static pressure excess / deficiency information of each variable air volume unit is integrated; and a seventh step of changing the static pressure excess / deficiency information of each variable air volume unit, in accordance with a result of the judgment of the sixth step, before the static pressure excess / deficiency information of each variable air volume unit is integrated, the sixth step includes a step of judging that the static pressure shortage should be changed to the static pressure adequacy for the variable air volume unit for which the static pressure excess / deficiency information indicates the static pressure shortage, in a case where an indoor temperature of the corresponding controlled zone is within an allowable temperature region.

10. The air conditioning control method according to claim 9, characterized in that the allowable temperature region includes a first allowable temperature region which is a region where a difference between an indoor temperature of a controlled zone and an indoor temperature set value is within a region from negative infinity to a positive first prescribed temperature in cooling and is within a region from negative first prescribed temperature to infinity in heating, and a second allowable temperature region which is a region where the indoor temperature of the controlled zone is within a region from negative infinity to a positive second prescribed temperature in cooling and is within a region from positive third prescribed temperature to infinity in heating, the sixth step includes a step of judging that the static pressure shortage should be changed to the static pressure adequacy for the variable air volume unit for which the static pressure excess / deficiency information indicates the static pressure shortage, in a case where the indoor temperature of the corresponding controlled zone is within at least one of the first allowable temperature region and the second allowable temperature region. including:

11. An air conditioning control method characterized by, a first step of controlling an opening degree of a damper of a variable air volume unit for each controlled zone, according to a required air volume which is determined in accordance with a load condition of the controlled zone; a second step of sending static pressure excess / deficiency information for each variable air volume unit, in accordance with the opening degree of the damper; a fourth step of correcting the fan rotation speed of the air conditioning device based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of each variable air volume unit; a fifth step of controlling the fan of the air conditioning device at a fan rotation speed decided in the third step and corrected in the fourth step; a sixth step of redetermining the static pressure excess / deficiency information of each variable air volume unit based on the indoor temperature or the indoor CO2 concentration of the controlled zone before the static pressure excess / deficiency information of each variable air volume unit is integrated; a seventh step of changing the static pressure excess / deficiency information of each variable air volume unit based on the determination result of the sixth step before the static pressure excess / deficiency information of each variable air volume unit is integrated, the sixth step includes the following step: for the variable air volume unit for which the static pressure excess / deficiency information indicates static pressure deficiency, in the case where the difference between the indoor CO2 concentration of the corresponding controlled zone and the indoor CO2 concentration set value is within the region from negative infinity to positive prescribed concentration, it is determined that the static pressure deficiency should be changed to reasonable. including: a first step of controlling the opening degree of the damper of the variable air volume unit for each controlled zone based on the required air volume decided based on the load condition of the controlled zone; a second step of sending out static pressure excess / deficiency information for each variable air volume unit based on the opening degree of the damper; 12. An air conditioning control method characterized by, a third step of deciding the fan rotation speed of the air conditioning device that supplies the supply air to the variable air volume unit based on the total required air volume obtained by adding the values of the required air volume of each variable air volume unit; a fourth step of correcting the fan rotation speed of the air conditioning device based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of each variable air volume unit; a fifth step of controlling the fan of the air conditioning device at a fan rotation speed decided in the third step and corrected in the fourth step; a sixth step of redetermining the static pressure excess / deficiency information of each variable air volume unit based on the indoor temperature or the indoor CO2 concentration of the controlled zone before the static pressure excess / deficiency information of each variable air volume unit is integrated; a seventh step of changing the static pressure excess / deficiency information of each variable air volume unit based on the determination result of the sixth step before the static pressure excess / deficiency information of each variable air volume unit is integrated; and an eighth step of predicting the indoor temperature at a future time for each controlled zone, in the sixth step, for the variable air volume unit for which the static pressure excess / deficiency information indicates static pressure deficiency, in the case where at least one of the indoor temperature and the indoor temperature prediction value of the corresponding controlled zone is within the allowable temperature region, it is determined that the static pressure deficiency should be changed to reasonable.

13. The air conditioning control method according to claim 12, characterized in that, ​ ​ ​ The allowable temperature region includes a first allowable temperature region in which, in cooling, a difference between an indoor temperature of a controlled region and an indoor temperature set value is negative to positive, and in heating, the difference is positive to infinite, and a second allowable temperature region in which, in cooling, the indoor temperature of the controlled region is negative to positive, and in heating, the indoor temperature of the controlled region is positive to infinite, The sixth step includes the step of determining that a static pressure deficient variable air volume unit should be changed to a reasonable one, for the static pressure excess / deficiency information indicating the static pressure deficient variable air volume unit, in a case where at least one of an indoor temperature and an indoor temperature prediction value of the corresponding controlled region is within at least one of the first allowable temperature region and the second allowable temperature region.

14. The air conditioning control method according to claim 12 or 13, wherein The sixth step includes the step of determining that a reasonable variable air volume unit should be changed to a static pressure deficient one, for the static pressure excess / deficiency information indicating the reasonable variable air volume unit, in a case where an indoor CO2 concentration prediction value of the corresponding controlled region is outside the allowable temperature region.

15. An air conditioning control method characterized by comprising: including: A first step of controlling an opening degree of a damper of a variable air volume unit for each controlled region, based on a required air volume determined based on a load condition of the controlled region; A second step of sending static pressure excess / deficiency information for each variable air volume unit, based on the opening degree of the damper; A third step of determining a fan rotation speed of an air conditioning device that supplies supply air to the variable air volume units, based on a total required air volume obtained by summing the required air volume of each variable air volume unit; A fourth step of correcting the fan rotation speed of the air conditioning device, based on total static pressure excess / deficiency information obtained by integrating the static pressure excess / deficiency information of each variable air volume unit; A fifth step of controlling the fan of the air conditioning device at the fan rotation speed determined in the third step and corrected in the fourth step; A sixth step of redetermining the static pressure excess / deficiency information based on an indoor temperature or an indoor CO2 concentration of the controlled region, before integrating the static pressure excess / deficiency information of each variable air volume unit; A seventh step of changing the static pressure excess / deficiency information of each variable air volume unit based on a determination result of the sixth step, before integrating the static pressure excess / deficiency information of each variable air volume unit; and An eighth step of predicting an indoor CO2 concentration at a future time for each controlled region, The sixth step includes the step of determining that a static pressure deficient variable air volume unit should be changed to a reasonable one, for the static pressure excess / deficiency information indicating the static pressure deficient variable air volume unit, in a case where a difference between the indoor CO2 concentration or an indoor CO2 concentration prediction value of the corresponding controlled region and an indoor CO2 concentration set value is within a region of negative infinite to positive prescribed concentration.

16. The air conditioning control method according to claim 15, wherein ​ The sixth step includes the following steps: for the reasonable variable air volume unit corresponding to the static pressure excess / deficiency information, if the difference between the predicted value of the indoor CO2 concentration in the corresponding controlled area and the set value of the indoor CO2 concentration is outside the range from negative infinity to positive specified concentration, it is determined that the static pressure should be changed from the reasonable state to the static pressure deficiency.

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