KR102655143B1 - Vav air conditioning system and air conditioning control method - Google Patents

Abstract

The object of the present invention is to realize energy saving and cost saving by reducing the number of corrections for increase in fan rotation speed.
The VAV air conditioning system according to the present invention integrates the static pressure excess and deficiency information of each VAV unit (1) with the VAV controller (2), which transmits static pressure excess and deficiency information for each VAV unit based on the damper opening degree of the VAV unit (1). Before, the court 61 that re-determines the static pressure excess or deficiency information based on the indoor temperature or indoor CO ₂ concentration of the controlled area, and before integrating the static pressure excess or deficiency information of each VAV unit 1, the court 61 It is provided with a static pressure excess/deficiency information change unit 62 that changes the static pressure excess/deficiency information of each VAV unit 1 based on the determination result.

Description

ＶＡＶ Air conditioning system and air conditioning control method {ＶＡＶ AIR CONDITIONING SYSTEM AND AIR CONDITIONING CONTROL METHOD}

The present invention relates to a VAV air conditioning system that adjusts cooling and heating capabilities by changing the amount of supply air blowing according to changes in the heat load of the indoor space.

Conventionally, in VAV (Variable Air Volume) air conditioning systems, a variable air supply volume control unit (VAV unit) is installed in each controlled area, and the amount of air supplied from this VAV unit is controlled by the VAV controller according to the load situation of the controlled area. This is done in a controlled manner (see Patent Document 1).

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

The fan rotation speed (F) of the air conditioner can be obtained from the total required air volume (Σvi), which is the sum of the required air volume (vi) of each VAV unit, using the following equation (FIG. 15).

F=a×Σvi+b (where Vmin≤Σvi≤Vmax) … (One)

F=Fmin(Σvi<Vmin) … (2)

F=Fmax(Σvi>Vmax) … (3)

a and b in equation (1) are predefined constants. Equation (2) means that when the total required air volume (Σvi) is less than the lower limit value Vmin, the fan rotation speed (F) is limited to the lower limit value Fmin. Equation (3) means that when the total required air volume (Σvi) is greater than the upper limit value Vmax, the fan rotation speed (F) is limited to the upper limit value Fmax.

Additionally, in the VAV air conditioning system, total static pressure excess/deficiency information (status) is created based on static pressure excess/deficiency information (status) sent from the VAV controller that controls each VAV unit, and fan rotation speed ( F) is corrected for increase/decrease.

Each VAV controller outputs static pressure excess or deficiency information among “static pressure insufficient,” “adequate,” or “static pressure excess,” depending on the damper opening degree of the VAV unit it controls. The air conditioning control device sets the total static pressure excess or deficiency information to "static pressure deficiency" if there is at least one "static pressure deficiency" among the static pressure excess or deficiency information sent from each VAV controller. When “adequate” and “excessive static pressure” are mixed among the static pressure excess/deficiency information sent from each VAV controller, the air conditioning control device sets the total static pressure excess/deficiency information to “adequate.” If all of the static pressure excess/deficiency information sent from each VAV controller is "static pressure excess", the air conditioning control device sets the total static pressure excess/deficiency information to "static pressure excess".

If the total static pressure excess or deficiency information is “static pressure insufficient,” the air conditioning control device corrects the fan rotation speed (F) of the air conditioner by increasing α% (α is a specified value). The air conditioning control device maintains the fan rotation speed F when the total static pressure excess/deficiency information is “adequate”. The air conditioning control device corrects the fan rotation speed (F) by reducing it by α% when the total static pressure excess/deficiency information is “static pressure excess”.

Hereinafter, problems with the prior art will be described.

[Problem 1]

Each VAV controller calculates the required air volume as shown in FIG. 16 based on the indoor temperature and the indoor temperature set value. In the example of FIG. 16, during cooling, when the indoor temperature is higher than the indoor temperature set point during cooling, the required air volume increases according to the characteristics of FIG. 16, and when the indoor temperature is below the indoor temperature set point during cooling, the required air volume is the minimum air volume. It becomes. In addition, during heating, when the indoor temperature is lower than the indoor temperature set value during heating, the required air volume increases according to the characteristics of FIG. 16, and when the indoor temperature is higher than the indoor temperature set value during heating, the required air volume becomes the minimum air volume.

The VAV controller controls the opening degree of the damper in the VAV unit to ensure the determined required air volume. Specifically, the VAV controller receives feedback on the measured air volume measured by the air volume sensor in the VAV unit and controls the damper opening so that the requested air volume and the measured air volume are equal.

Each VAV controller outputs either “static pressure deficiency,” “adequate,” or “static pressure excess,” depending on the damper opening degree of the VAV unit. However, even if the static pressure excess or deficiency information is “static pressure deficiency,” There are cases where the indoor temperature is good (the absolute value of the difference between the indoor temperature set point and the indoor temperature is within Δ°C). Figure 17 shows an example when the indoor temperature is PV. Figure 17 shows an example during cooling, but even during heating, a phenomenon of insufficient static pressure occurs despite the indoor temperature being good. Additionally, since the control direction of the indoor temperature (warm, cool) changes, the absolute value of the difference between the indoor temperature set value and the indoor temperature is used to determine whether the indoor temperature is good.

The problem of static pressure being insufficient even when the indoor temperature is good (the absolute value of the difference between the set indoor temperature and the indoor temperature is within Δ°C) is that even though the indoor temperature is good, that is, the required air volume is small, the measured air volume is less than the required air volume. It is due to not being able to reach it. Possible reasons for the measured air volume falling short of the required air volume include insufficient fan rotation speed or insufficient air volume to the target VAV unit because the required air volume of another VAV unit is large. As a result, even if the indoor temperature was good, the total static pressure excess/deficiency information was changed to "static pressure insufficient", and the fan rotation speed was increased and corrected, resulting in increased energy and increased costs.

[Problem 2]

Additionally, by setting a temperature that is excessive (e.g., the indoor temperature set value is 20°C) compared to a generally comfortable temperature (e.g., 25 to 27°C in summer), the required air volume of the VAV unit may always be at the maximum air volume (Figure 18). . At this time, since the static pressure excess or deficiency information of “static pressure insufficient” is continuously output, there is a problem in that the fan rotation speed is continuously increased and corrected.

[Patent Document 1] Japanese Patent No. 3334069

The present invention was made to solve the above problems, and its purpose is to provide a VAV air conditioning system and air conditioning control method that can realize energy saving and cost saving by reducing the number of corrections for increase in fan rotation speed.

The VAV air conditioning system of the present invention includes an air conditioner, a VAV unit provided for each controlled area, and a control unit configured to control the damper opening of the VAV unit for each controlled area according to the required air volume determined according to the load situation of the controlled area. 1. A control unit, a status notification unit configured to transmit static pressure excess/deficiency information to each VAV unit based on the opening degree of the damper, and a fan rotation of the air conditioner based on the total required air volume obtained by adding up the values of the requested air volume of each VAV unit. a fan rotation speed determination unit configured to determine the number of rotations, a fan rotation speed correction unit configured to correct the fan rotation speed of the air conditioner based on total static pressure excess/deficiency information integrating the static pressure excess/deficiency information of each VAV unit, and a fan rotation speed correction unit configured to correct the fan rotation speed of the air conditioner. Before integrating the static pressure excess and deficiency information of each VAV unit with a second control unit configured to control the fan of the air conditioner to the fan rotation speed determined by the number determination unit and corrected by the fan rotation speed correction unit, the blood a decision unit configured to re-determine the static pressure excess or deficiency information based on the indoor temperature or indoor CO ₂ concentration of the control area; and, before integrating the static pressure excess or deficiency information of each VAV unit, each VAV unit determines the information based on the determination result of the judging unit. It is characterized by having a static pressure excess or deficiency information change unit configured to change the static pressure excess or deficiency information of the VAV unit.

In addition, in one configuration example of the VAV air conditioning system of the present invention, the decision unit determines that, when the indoor temperature of the controlled area corresponding to the VAV unit for which the static pressure excess/deficiency information indicates a static pressure deficiency is within the allowable temperature range, It is characterized by determining that the static pressure must be changed from insufficient to appropriate.

In addition, in one configuration example of the VAV air conditioning system of the present invention, the allowable temperature region is a region where the difference between the indoor temperature of the controlled area and the indoor temperature set point during cooling is from negative infinity to positive first predetermined temperature. , a first allowable temperature area in which the difference between the indoor temperature of the controlled area and the indoor temperature set point during heating ranges from a negative first predetermined temperature to infinity, and a first allowable temperature area in which the indoor temperature of the controlled area ranges from negative infinity to positive during cooling. It is an area up to a second predetermined temperature, and the indoor temperature of the controlled area during heating is composed of a second allowable temperature area in which the area is from a positive third predetermined temperature to infinity, and the judging unit determines the static pressure excess/deficiency information. Regarding the VAV unit showing a hypothetical static pressure deficiency, if the indoor temperature of the corresponding controlled area is within at least one of the first allowable temperature zone and the second allowable temperature zone, determining that the static pressure must be changed from insufficient to appropriate. It is characterized by:

In addition, in one configuration example of the VAV air conditioning system of the present invention, the judging unit determines the indoor CO ₂ concentration and the indoor CO ₂ concentration set value of the corresponding controlled area with respect to the VAV unit for which the static pressure excess or deficiency information indicates static pressure deficiency. If the difference between is within the range from negative infinity to positive predetermined concentration, it is characterized in that it is determined that the static pressure must be changed from insufficient to appropriate.

In addition, one configuration example of the VAV air conditioning system of the present invention further includes an indoor temperature prediction unit configured to predict the indoor temperature at a future time in each controlled area, and the judging unit is configured to determine whether the static pressure excess or deficiency information determines the static pressure deficiency. Regarding the VAV unit indicating, if at least one of the indoor temperature of the corresponding controlled area and the indoor temperature predicted value is within the allowable temperature range, it is characterized in that it is determined that the static pressure must be changed from insufficient to appropriate.

In addition, in one configuration example of the VAV air conditioning system of the present invention, the allowable temperature region is a region where the difference between the indoor temperature of the controlled area and the indoor temperature set point during cooling is from negative infinity to positive first predetermined temperature. , a first allowable temperature area in which the difference between the indoor temperature of the controlled area and the indoor temperature set point during heating ranges from a negative first predetermined temperature to infinity, and a first allowable temperature area in which the indoor temperature of the controlled area ranges from negative infinity to positive during cooling. It is an area up to a second predetermined temperature, and the indoor temperature of the controlled area during heating is composed of a second allowable temperature area in which the area is from a positive third predetermined temperature to infinity, and the judging unit determines the static pressure excess/deficiency information. Regarding the VAV unit showing an assumed static pressure shortage, if at least one of the indoor temperature and the indoor temperature predicted value of the corresponding controlled area is within at least one of the first allowable temperature area and the second allowable temperature area, the static pressure shortage It is characterized by determining that it should be changed from to appropriate.

In addition, in one configuration example of the VAV air conditioning system of the present invention, the judging unit, when the indoor temperature predicted value of the corresponding controlled area with respect to the VAV unit for which the static pressure excess or deficiency information indicates appropriateness is outside the allowable temperature zone, , It is characterized by determining that the static pressure should be changed from adequate to insufficient static pressure.

In addition, one configuration example of the VAV air conditioning system of the present invention further includes an indoor CO ₂ concentration prediction unit configured to predict the indoor CO ₂ concentration at a future time in each controlled area, wherein the judging unit determines whether the static pressure is excessive or insufficient. When the difference between the indoor CO ₂ concentration or the indoor CO ₂ concentration predicted value and the indoor CO ₂ concentration set value in the corresponding controlled area for the VAV unit for which the information indicates a lack of static pressure is within the range from negative infinity to a positive predetermined concentration, It is characterized by determining that the static pressure must be changed from insufficient to appropriate.

In addition, in one configuration example of the VAV air conditioning system of the present invention, the judging unit determines the indoor CO ₂ concentration predicted value and the indoor CO ₂ concentration set value in the corresponding controlled area with respect to the VAV unit for which the static pressure excess or deficiency information indicates appropriateness. If the difference is outside the range from negative infinity to positive predetermined concentration, it is characterized in that it is determined that the pressure should be changed from titration to positive pressure deficiency.

In addition, the air conditioning control method of the present invention includes a first step of controlling the damper opening of the VAV unit for each controlled area according to the required air volume determined according to the load situation of the controlled area, and based on the opening of the damper, A second step of transmitting static pressure excess/deficiency information to each VAV unit, and a third step of determining the fan rotation speed of the air conditioner that supplies air to the VAV unit based on the total required air volume that is the sum of the required air volume values of each VAV unit. A fourth step of correcting the fan rotation speed of the air conditioner based on total static pressure excess and deficiency information that integrates the static pressure excess and deficiency information of each VAV unit, and the fan determined in the third step and corrected in the fourth step. A fifth step of controlling the fan of the air conditioner so that the number of rotations is high, and before integrating the static pressure excess or deficiency information of each VAV unit, re-determination of the static pressure excess or deficiency information based on the indoor temperature or indoor CO ₂ concentration of the controlled area. A sixth step of performing a change, and a seventh step of changing the static pressure excess/deficiency information of each VAV unit based on the determination result of the sixth step, before integrating the static pressure excess/deficiency information of each VAV unit. will be.

In addition, in one configuration example of the air conditioning control method of the present invention, the sixth step is performed when the indoor temperature of the controlled area corresponding to the VAV unit for which the static pressure excess/deficiency information indicates a static pressure deficiency is within the allowable temperature range. , It is characterized by including a step of determining that the static pressure should be changed from insufficient to appropriate.

In addition, in one configuration example of the air conditioning control method of the present invention, the allowable temperature area is an area where the difference between the indoor temperature of the controlled area and the indoor temperature set point during cooling is from negative infinity to positive first predetermined temperature. , a first allowable temperature area in which the difference between the indoor temperature of the controlled area and the indoor temperature set point during heating ranges from a negative first predetermined temperature to infinity, and a first allowable temperature area in which the indoor temperature of the controlled area ranges from negative infinity to positive during cooling. It is a region up to a second predetermined temperature, and the indoor temperature of the controlled area during heating is comprised of a second allowable temperature region in which the indoor temperature of the controlled area ranges from a positive third predetermined temperature to infinity, and the sixth step is to determine whether the static pressure is excessive or insufficient. Regarding the VAV unit for which the information indicates a lack of static pressure, if the indoor temperature of the corresponding controlled area is within at least one of the first allowable temperature area and the second allowable temperature area, it is said that the static pressure must be changed from insufficient to appropriate. It is characterized by including a decision step.

In addition, in one configuration example of the air conditioning control method of the present invention, the sixth step is to determine the indoor CO ₂ concentration and the indoor CO ₂ concentration in the controlled area corresponding to the VAV unit for which the static pressure excess/deficiency information indicates static pressure deficiency. If the difference in the set value is within the range from negative infinity to positive predetermined concentration, it is characterized by including a step of determining that the static pressure must be changed from insufficient to appropriate.

In addition, one configuration example of the air conditioning control method of the present invention further includes an eighth step of predicting the indoor temperature of each controlled area at a future time, and the sixth step is to determine whether the static pressure excess or deficiency information determines the static pressure deficiency. Regarding the VAV unit indicating, if at least one of the indoor temperature of the corresponding controlled area and the indoor temperature predicted value is within the allowable temperature range, it is characterized in that it is determined that the static pressure must be changed from insufficient to appropriate.

In addition, in one configuration example of the air conditioning control method of the present invention, the allowable temperature area is an area where the difference between the indoor temperature of the controlled area and the indoor temperature set point during cooling is from negative infinity to positive first predetermined temperature. , a first allowable temperature area in which the difference between the indoor temperature of the controlled area and the indoor temperature set point during heating ranges from a negative first predetermined temperature to infinity, and a first allowable temperature area in which the indoor temperature of the controlled area ranges from negative infinity to positive during cooling. It is a region up to a second predetermined temperature, and the indoor temperature of the controlled area during heating is comprised of a second allowable temperature region in which the indoor temperature of the controlled area ranges from a positive third predetermined temperature to infinity, and the sixth step is to determine whether the static pressure is excessive or insufficient. When at least one of the indoor temperature and the indoor temperature predicted value of the corresponding controlled area with respect to the VAV unit for which the information indicates a lack of static pressure is within at least one of the first allowable temperature area and the second allowable temperature area, the static pressure It is characterized by including a step of determining that it should be changed from insufficient to adequate.

In addition, in one configuration example of the air conditioning control method of the present invention, the sixth step is performed when the indoor temperature predicted value of the controlled area corresponding to the VAV unit for which the static pressure excess/deficiency information indicates appropriateness is outside the allowable temperature zone. It is characterized by including a step of determining that the static pressure should be changed from adequate to insufficient static pressure.

In addition, one configuration example of the air conditioning control method of the present invention further includes an eighth step of predicting the indoor CO ₂ concentration at a future time in each controlled area, and the sixth step is to determine the static pressure excess or deficiency information. For a VAV unit showing a lack of static pressure, if the indoor CO ₂ concentration in the corresponding controlled area or the difference between the predicted value of the indoor CO ₂ concentration and the set value of the indoor CO ₂ concentration is within the range from negative infinity to a positive predetermined concentration, the static pressure is insufficient. It is characterized by including a step of determining that it should be changed from to appropriate.

In addition, in one configuration example of the air conditioning control method of the present invention, the sixth step includes a predicted indoor CO ₂ concentration and an indoor CO ₂ concentration in the corresponding controlled area with respect to the VAV unit for which the static pressure excess/deficiency information indicates appropriateness. If the difference in set value is outside the range from negative infinity to positive predetermined concentration, it is characterized by including a step of determining that the pressure should be changed from adequate to insufficient static pressure.

According to the present invention, by installing the judging unit and the static pressure excess/deficiency information change unit, the static pressure excess/deficiency information of the static pressure deficiency can be reduced, so the number of times of increase correction of the fan rotation speed can be reduced, and energy saving and cost saving can be realized. .

1 is a diagram explaining the allowable temperature range during cooling according to the present invention.
Figure 2 is a diagram explaining the allowable temperature range during heating according to the present invention.
Figure 3 is a diagram illustrating an example of re-determination of static pressure excess or deficiency information according to the present invention.
Figure 4 is a diagram illustrating another example of re-determination of static pressure excess or deficiency information according to the present invention.
Figure 5 is a block diagram showing the configuration of a VAV air conditioning system according to the first embodiment of the present invention.
Figure 6 is a block diagram showing the configuration of the VAV controller of the VAV air conditioning system according to the first embodiment of the present invention.
Figure 7 is a block diagram showing the configuration of an air conditioner of a VAV air conditioning system according to the first embodiment of the present invention.
Figure 8 is a block diagram showing the configuration of an air conditioner controller of a VAV air conditioning system according to the first embodiment of the present invention.
Figure 9 is a flowchart explaining the operation of the VAV controller of the VAV air conditioning system according to the first embodiment of the present invention.
Figure 10 is a flowchart explaining the operation of the air conditioner controller of the VAV air conditioning system according to the first embodiment of the present invention.
Figure 11 is a flowchart explaining the operation of the analysis device of the VAV air conditioning system according to the first embodiment of the present invention.
Figure 12 is a block diagram showing the configuration of a VAV air conditioning system according to a second embodiment of the present invention.
Figure 13 is a flowchart explaining the operation of the analysis device of the VAV air conditioning system according to the second embodiment of the present invention.
Figure 14 is a block diagram showing a configuration example of a computer implementing the VAV air conditioning system according to the first and second embodiments of the present invention.
Figure 15 is a diagram showing the relationship between the fan rotation speed of the air conditioner and the total required air volume of each VAV unit.
Figure 16 is a diagram explaining a method of determining the required air volume based on the indoor temperature and the indoor temperature set value.
FIG. 17 is a diagram illustrating an example in which static pressure is insufficient even if the indoor temperature is good.
Fig. 18 is a diagram illustrating an example in which static pressure becomes insufficient due to excessive temperature setting.

[Principle of invention]

In the present invention, re-determination is performed in the form of changing the static pressure excess or deficiency information from “static pressure deficiency” to “adequate” or from “adequate” to “static pressure deficiency” based on temperature (actual or predicted value) information. More specifically, even if the VAV unit is determined to be “static pressure insufficient,” it is re-determined as “adequate” if the actual measured value of the room temperature is within the allowable temperature range. Additionally, even in a VAV unit determined as “adequate,” if the predicted value of the room temperature is outside the allowable temperature range, it is re-determined as “static pressure insufficient.”

Here, in the present invention, two types of allowable temperature regions are assumed: a first allowable temperature region A1 and a second allowable temperature region A2. The first allowable temperature area A1 is an area where the difference (PV-SP) between the indoor temperature (PV) and the indoor temperature set point (SP) during cooling is from negative infinity to Δ°C (positive first predetermined temperature). , and the difference (PV-SP) between the indoor temperature (PV) and the indoor temperature set point (SP) during heating is a range from -Δ°C (negative first predetermined temperature) to infinity. The first allowable temperature area A1 is intended to solve the first problem described above.

The second allowable temperature area A2 is a predetermined temperature (optimized indoor temperature upper limit during cooling or optimal indoor temperature during heating) set within a generally comfortable indoor temperature range (e.g., 25 to 27°C in summer and 20 to 24°C in winter). This is the area where energy consumption increases. The second allowable temperature area A2 is intended to solve the second problem described above. FIG. 1 shows allowable temperature areas A1 and A2 during cooling, and FIG. 2 shows allowable temperature areas A1 and A2 during heating.

In addition, even in areas outside the temperature range where the indoor temperature is generally comfortable, there are regulations regarding areas where energy consumption is reduced (increasing the indoor temperature setpoint when cooling, lowering the indoor temperature setpoint when heating). 2 Not within the allowable temperature range (A2). That is, the second allowable temperature area (A2) during cooling is a temperature range from negative infinity to the upper limit of the optimized indoor temperature (positive second predetermined temperature) during cooling, and the second allowable temperature area (A2) during heating is the temperature range from the lower limit of the optimized indoor temperature during heating (positive third predetermined temperature) to infinity.

In the present invention, an example of re-determining from “static pressure insufficient” to “adequate” during cooling will be explained using FIG. 3. In FIG. 3, t1 to t8 indicate the times at which the measured values of the indoor temperature were obtained. Additionally, to simplify the explanation, FIG. 3 only illustrates the case where the allowable temperature region A1 is used.

At times t1 and t2, since the indoor temperature is outside the allowable temperature range A1, the static pressure excess or deficiency information does not change from “static pressure deficiency” to “adequate”. From time t3 to t7, since the indoor temperature is within the allowable temperature range A1, the static pressure excess/deficiency information changes from “static pressure deficiency” to “adequate”. At time t8, since the indoor temperature is outside the allowable temperature range A1, the re-determination result is “static pressure insufficient.”

In this way, in the present invention, since the number of VAV units determined to be “static pressure insufficient” by re-determination is reduced, the opportunity for increase correction in the fan rotation speed is also reduced.

As the indoor temperature, by using the predicted value of the indoor temperature one step ahead in addition to the current value, the static pressure excess/deficiency information can be re-determined in consideration of the tendency of temperature change. In this case, if at least one of the measured value of the room temperature and the predicted value one step ahead is within the allowable temperature range, it is re-determined as “appropriate.”

In the present invention, an example of re-determining from “static pressure insufficient” to “adequate” during cooling will be explained using FIG. 4. In FIG. 4, t1 to t8 indicate the times at which the measured and predicted values of the indoor temperature are obtained. ○ indicates the measured value of the indoor temperature, and □ indicates the predicted value of the indoor temperature. Additionally, to simplify the explanation, FIG. 4 only illustrates the case where the allowable temperature region A1 is used.

At time t1, since the measured value of the room temperature is outside the allowable temperature range A1, the static pressure excess or deficiency information does not change from “static pressure deficiency” to “adequate”. At time t2, the measured value of the room temperature is outside the allowable temperature area A1, but the predicted value is within the allowable temperature area A1, so the static pressure excess/deficiency information changes from “static pressure deficiency” to “adequate”. At times t3 to t6, both the measured value and the predicted value of the room temperature are within the allowable temperature range A1, so the static pressure excess/deficiency information changes from “static pressure deficiency” to “adequate”. At time t7, the predicted value is outside the allowable temperature range A1, but the measured value is within the allowable temperature range A1, so the static pressure excess/deficiency information changes from “static pressure deficiency” to “adequate”. At time t8, both the measured value and the predicted value are outside the allowable temperature range A1, so the re-determination result is “static pressure insufficient.”

The advantage of using the predicted value of the indoor temperature is that even if the measured indoor temperature value is outside the allowable temperature range, such as at time t2, the predicted value is judged to be “appropriate” when it is within the allowable temperature range, so the fan speed can be reduced one step faster and corrected. This means that it can contribute to energy conservation and cost savings.

[First Example]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 5 is a block diagram showing the configuration of a VAV air conditioning system according to the first embodiment of the present invention. The VAV air conditioning system includes a VAV unit (1), which is a variable air supply amount control unit that is installed in each controlled area (air conditioning zone) and controls the amount of air supplied to the controlled area for each controlled area, and a VAV unit (1). A VAV controller (2) installed at each VAV controller (2) to control the corresponding VAV unit (1), an air conditioner (3), and an air supply duct (4) to supply air from the air conditioner (3) to each VAV unit (1). , It consists of an air conditioner controller (5) that controls the air conditioner (3), and an analysis device (6) installed in the central system (7).

Fig. 6 is a block diagram showing the configuration of the VAV controller 2. Each VAV controller 2 calculates the required air volume of the VAV unit 1 based on the difference between the indoor temperature of the corresponding controlled area and the indoor temperature set value set by the resident of the controlled area or the administrator of the air conditioning system. An air volume calculation unit 20 and an air volume control unit 21 that controls the opening degree of a damper that adjusts the supply air blowing volume of the VAV unit 1 to secure the required air volume calculated by the required air volume calculation unit 20 (see 1 control unit), a requested air volume notification unit 22 that notifies the air conditioner controller 5 of the value of the requested air volume, and a status notification unit 23 that transmits static pressure excess or deficiency information for each controlled area to the air conditioner controller 5. ) and an indoor temperature notification unit 24 that notifies the air conditioner controller 5 of the indoor temperature of the corresponding controlled area.

Figure 7 is a block diagram showing the configuration of the air conditioner 3. The air conditioner 3 is equipped with a cooling coil 30, a heating coil 31, and a fan 32. In addition, the configuration shown in FIG. 7 is an example, and of course, configurations other than FIG. 7 may be used.

Figure 8 is a block diagram showing the configuration of the air conditioner controller 5. The air conditioner controller 5 includes a manipulated variable output unit 50 that outputs a manipulated variable for controlling the air conditioner 3 based on the deviation between the supply air temperature and the supply air temperature set point, and the required air volume notified from each VAV controller 2. An air volume calculation unit 51 that calculates the total required air volume of the entire system from the value, and a fan rotation speed determination unit 52 that determines the fan rotation speed of the air conditioner 3 based on the calculated total required air volume value. and an air volume control unit 53 (second control unit) that controls the fan 32 of the air conditioner 3, and information creation to create total static pressure excess or deficiency information based on the static pressure excess or deficiency information notified from each VAV controller 2. It is provided with a unit 54 and a fan rotation speed correction unit 55 that corrects the fan rotation speed of the air conditioner 3 based on the total static pressure excess or deficiency information.

As shown in FIG. 1, the analysis device 6 includes a data accumulation unit 60 that accumulates indoor temperature and static pressure excess/deficiency information and indoor temperature set value data for each controlled area, and the data of each VAV unit 1. Before integrating the static pressure excess/deficiency information, a judgment unit 61 that re-determines the static pressure excess/deficiency information based on the indoor temperature of the controlled area, and before integrating the static pressure excess/deficiency information of each VAV unit 1, a adjudication unit 61 ) is provided with a static pressure excess/deficiency information changing unit 62 that changes the static pressure excess/deficiency information of each VAV unit 1 based on the determination result.

A VAV unit (1) and a VAV controller (2) are provided for each controlled area. The air (supply air) cooled or heated by the air conditioner (3) is supplied to the VAV unit (1) of each controlled area through the air supply duct (4), passes through the VAV unit (1), and is supplied to each controlled area. It is intended to be supplied. A damper (not shown) is provided within the VAV unit 1, allowing the amount of air supplied through the VAV unit 1 to be adjusted.

Next, the operation of this embodiment will be described. FIG. 9 is a flowchart explaining the operation of the VAV controller 2, and FIG. 10 is a flowchart explaining the operation of the air conditioner controller 5.

The indoor temperature notification unit 24 of the VAV controller 2 notifies the air conditioner controller 5 of the indoor temperature (PV) and indoor temperature set point (SP) values measured by the indoor temperature sensor in the corresponding controlled area. (step S100 in FIG. 9). Additionally, when the indoor temperature set point (SP) is set by the administrator of the air conditioning system and notified to each VAV controller 2 from the air conditioner controller 5, the indoor temperature set point SP is sent from each VAV controller 2. There is no need to notify the air conditioner controller (5).

The required air volume calculation unit 20 of the VAV controller 2 calculates the required air volume vi of the VAV unit 1 to be controlled according to the heat load situation of the corresponding controlled area (step S101 in FIG. 9 ). Specifically, the required air volume calculation unit 20 operates the VAV unit 1 so that the indoor temperature (PV) of the corresponding controlled area matches the indoor temperature set point (SP) set by the resident of the controlled area or the manager of the air conditioning system. Calculate the required air volume (vi).

The requested air volume notification unit 22 of the VAV controller 2 notifies the air conditioner controller 5 of the value of the required air volume vi calculated by the required air volume calculation unit 20 (step S102 in FIG. 9).

The air volume control unit 21 of the VAV controller 2 controls the opening degree of the damper (not shown) in the VAV unit 1 to be controlled to ensure the required air volume calculated by the required air volume calculation unit 20 ( Step S103 in FIG. 9).

The status notification unit 23 of the VAV controller 2 transmits static pressure excess/deficiency information indicating the current cooling/heating control state of the corresponding controlled area to the air conditioner controller 5 (step S104 in FIG. 9). The status notification unit 23 creates, for example, based on the damper opening degree of the VAV unit 1, any one of “static pressure insufficient,” “adequate,” and “static pressure excess” information.

Specifically, the status notification unit 23 determines “static pressure insufficient” when the damper opening degree of the VAV unit 1 is fully open. The status notification unit 23 sets the damper opening of the VAV unit 1 to “adequate” if it is not fully open but is above a predetermined opening (e.g., 85%). The status notification unit 23 determines “static pressure excessive” when the damper opening of the VAV unit 1 is less than the predetermined opening.

The VAV controller 2 and the VAV unit 1 perform the processing of steps S100 to S104 as described above at regular intervals until the air conditioning is stopped (YES in step S105 of FIG. 9).

Meanwhile, the manipulation quantity output unit 50 of the air conditioner controller 5 calculates the manipulation quantity using a predetermined control operation algorithm (e.g., PID) so that the supply air temperature and the supply air temperature set value match, and outputs it to the air conditioner 3 (FIG. 10 step S200). In this way, the amount of heat source (cold water or hot water) supplied to the cooling coil 30 or heating coil 31 of the air conditioner 3 is adjusted according to the operating amount to control the supply air temperature.

The air volume calculation unit 51 of the air conditioner controller 5 calculates the total requested air volume Σvi by adding up the values of the required air volume vi notified from each VAV controller 2 (step S201 in FIG. 10).

The fan speed determination unit 52 of the air conditioner controller 5 determines the fan speed F of the air conditioner 3 based on the value of the total required air volume Σvi (step S202 in FIG. 10). The fan rotation speed determination unit 52 determines the fan rotation speed F corresponding to the total required air volume Σvi based on the relationships shown in Equations (1) to (3) above.

The information creation unit 54 of the air conditioner controller 5 creates total static pressure excess and deficiency information based on the static pressure excess and deficiency information notified from each VAV controller 2, and the static pressure excess and deficiency information is determined by the analysis device 6 as described later. Check whether there has been a change in information (step S203 in FIG. 10).

If there is no change in the static pressure excess or deficiency information by the analysis device 6, the information creation unit 54 creates total static pressure excess or deficiency information using the static pressure excess or deficiency information notified from each VAV controller 2 as is (FIG. 10 Step S204). As in the past, the information creation unit 54 sets the total static pressure excess or deficiency information as “static pressure deficiency” when there is at least one “static pressure deficiency” among the static pressure excess or deficiency information sent from each VAV controller 2. If “adequate” and “static pressure excess” are mixed among the static pressure excess or deficiency information sent from each VAV controller 2, the information creation unit 54 sets the total static pressure excess or deficiency information as “adequate.” When all of the static pressure excess/deficiency information sent from each VAV controller 2 is "static pressure excess", the information creation unit 54 sets the total static pressure excess/deficiency information to "static pressure excess".

In addition, when the static pressure excess or deficiency information is changed by the analysis device 6, the information creation unit 54 selects the changed static pressure excess or deficiency information and the static pressure excess or deficiency information notified from each VAV controller 2 by the analysis device 6. Using the unchanged static pressure excess or deficiency information, total static pressure excess or deficiency information is created (step S205 in FIG. 10). If there is at least one “static pressure deficiency” among the changed static pressure excess or deficiency information and the unchanged static pressure excess or deficiency information, the information creation unit 54 sets the total static pressure excess or deficiency information to “static pressure deficiency”. If “adequate” and “static pressure excess” are mixed among the changed static pressure excess or deficiency information and the unchanged static pressure excess or deficiency information, the information creation unit 54 sets the total static pressure excess or deficiency information to “adequate.” If both the changed static pressure excess and deficiency information and the unchanged static pressure excess and deficiency information are "static pressure excess", the information creation unit 54 sets the total static pressure excess and deficiency information to "static pressure excess".

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 excess or deficiency information (step S206 in FIG. 10). As in the past, the fan speed correction unit 55 corrects the fan speed F determined by the fan speed determination unit 52 by increasing α% when the total static pressure excess/deficiency information is “static pressure insufficient” (α is a predetermined amount of real numbers). When the total static pressure excess/deficiency information is “adequate,” the fan speed correction unit 55 maintains the current fan speed F determined by the fan speed determination unit 52. When the total static pressure excess/deficiency information is “too much static pressure,” the fan speed correction unit 55 corrects the fan speed F determined by the fan speed determination unit 52 by reducing it by α%.

The air volume control unit 53 of the air conditioner controller 5 controls the air conditioner ( 3) The fan 32 is controlled (step S207 in FIG. 10). In this way, the volume of air supplied from the air conditioner 3 is controlled.

The air conditioner controller 5 performs the processing of steps S200 to S207 as described above at regular intervals until the air conditioning stops (YES in step S208 of FIG. 10). Additionally, each air conditioner controller 5 performs the processing in FIG. 10 for each corresponding air conditioner 3. Accordingly, each air conditioner controller 5 performs the processing shown in FIG. 10 with respect to the VAV unit 1 and VAV controller 2 belonging to the same air conditioning system (same air conditioner 3).

Figure 11 is a flowchart explaining the operation of the analysis device 6. During air conditioning operation, the data accumulation unit 60 of the analysis device 6 receives the indoor temperature (PV), static pressure excess/deficiency information, and indoor temperature set point (SP) notified from each VAV controller 2 from the air conditioner controller 5. Always collect and accumulate (step S300 in FIG. 11).

The decision unit 61 of the analysis device 6 re-determines the latest static pressure excess/deficiency information notified from each VAV controller 2. Specifically, the court 61 acquires the latest data accumulated in the data storage unit 60 (step S301 in FIG. 11). Then, the court 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 in FIG. 11).

Next, the judging unit 61 makes a re-judgment regarding the static pressure excess/deficiency information of “static pressure insufficient” extracted in step S302 (step S303 in FIG. 11). Here, for clarity of explanation, the VAV unit for which the latest static pressure excess or deficiency information is “static pressure insufficient” is denoted as 1-i, and the latest indoor temperature of the controlled area corresponding to the VAV unit (1-i) is denoted as PVi, and the indoor temperature set value. is SPi, the first allowable temperature area of the controlled area corresponding to the VAV unit 1-i is A1i, and the second allowable temperature area is A2i.

Regarding the VAV unit 1-i in which the static pressure excess/deficiency information is “static pressure insufficient”, the court 61 based on the indoor temperature set point SPi, the upper limit of the optimal indoor temperature during cooling, and the lower limit of the optimal indoor temperature during heating, A first allowable temperature range (A1i) and a second allowable temperature range (A2i) are set. And, if the room temperature PVi is within at least one of the first permissible temperature area A1i and the second permissible temperature area A2i, the judgment unit 61 sets the static pressure excess/deficiency information of “static pressure deficiency” to “static pressure deficiency”. It is decided that it should be changed to “appropriate.” In addition, the court 61 determines that if the room temperature PVi is outside the range of the first allowable temperature area A1i and the second allowable temperature area A2i, the static pressure excess/deficiency information of “static pressure deficiency” must be changed. I decide no. The decision unit 61 re-determines the static pressure excess/deficiency information as described above for each VAV unit 1 (for each controlled area) of “static pressure deficiency.”

When the static pressure excess/shortage information change unit 62 of the analysis device 6 determines that the static pressure excess/shortage information of “static pressure insufficient” should be changed to “adequate” by the judging unit 61 (in step S304 of FIG. 11 YES), the above information held by the air conditioner controller 5 is changed to “appropriate” (step S305 in FIG. 11). Additionally, if there is no static pressure excess or deficiency information determined to be changed to “adequate” (NO in step S304), the static pressure excess or deficiency information changing unit 62 notifies the air conditioner controller 5 that there is no change in the static pressure excess or deficiency information. (step S306 in FIG. 11).

As described above, when there is no change in the static pressure excess or deficiency information, the information creation unit 54 of the air conditioner controller 5 creates total static pressure excess or deficiency information using the static pressure excess or deficiency information notified from each VAV controller 2 as is. (step S204). In addition, when the static pressure excess or deficiency information is changed, the information creation unit 54 uses the static pressure excess or deficiency information that has not been changed by the analysis device 6 among the changed static pressure excess or deficiency information and the static pressure excess or deficiency information notified from each VAV controller 2. Thus, total static pressure excess or deficiency information is created (step S205).

The analysis device 6 performs the processing of steps S300 to S306 as described above at regular intervals until the air conditioning is stopped (YES in step S307 of FIG. 11). Additionally, the analysis device 6 performs the processing in FIG. 11 for each air conditioner controller 5 (for each air conditioner 3).

In this way, in this embodiment, since the static pressure excess/deficiency information of "static pressure deficiency" can be reduced, the number of times of increase correction of the fan rotation speed can be reduced, and energy saving and cost saving can be realized.

[Second Embodiment]

Next, a second embodiment of the present invention will be described. Figure 12 is a block diagram showing the configuration 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 supply duct (4), an air conditioner controller (5), and an analysis device (6a) installed in the central system (7). It is composed.

The configuration of the VAV unit 1, VAV controller 2, air conditioner 3, and air conditioner controller 5 is the same as that of the first embodiment.

As shown in FIG. 12, the analysis device 6a predicts the indoor temperature of the data storage unit 60, the decision unit 61a, the static pressure excess/shortage information change unit 62, and each controlled area at a future time. It is provided with an indoor temperature prediction unit 63 that predicts the temperature.

Figure 13 is a flowchart explaining the operation of the analysis device 6a. The data storage unit 60 of the analysis device 6a stores the indoor temperature (PV) and static pressure excess/shortage information and the indoor temperature set point (SP) notified from each VAV controller 2 during air conditioning operation. Data on the required air volume (vi) and supply air temperature (APV) notified from are always collected and accumulated from the air conditioner controller 5 (step S300a in FIG. 13).

The decision section 61a of the analysis device 6a acquires the latest data accumulated in the data storage section 60 (step S301a in FIG. 13). The judging unit 61a extracts the static pressure excess/deficiency information of “static pressure insufficient” and the static pressure excess/deficiency information of “adequate” from the latest static pressure excess/deficiency information acquired in step S301a (step S302a in FIG. 13).

Meanwhile, the indoor temperature prediction unit 63 predicts the indoor temperature (PV') one step ahead (after a predetermined time) of the controlled area for each controlled area (step S308 in FIG. 13). The room temperature (PV') before step 1 is the room temperature (PV) after the re-judgment period has elapsed from the present, and is the room temperature (PV) at the time of the next re-judgment.

The indoor temperature prediction unit 63 determines the latest outside air temperature (TO) measured by an outside air temperature sensor, not shown, the latest outside air humidity (HO) measured by an outside air humidity sensor, not shown, and the latest outside air temperature acquired in step S301a. Based on the required air volume (vi), the latest indoor temperature (PV) of the controlled area obtained in step S301a, and the latest supply air temperature (APV) obtained in step S301a, the indoor temperature (PV') of the controlled area is predicted by, for example, a neural network.

In the indoor temperature prediction unit 63, the outdoor temperature (TO), the outdoor humidity (HO), the required air volume (vi), the supply air temperature (APV), the indoor temperature (PV), and the indoor temperature one step ahead (PV') A neural network that models the relationship for each controlled area has been built in advance. Among the time series data recorded during the past data collection period, the neural network includes time series data of outside temperature (TO), time series data of outside humidity (HO), time series data of required air volume (vi), and time series of supply air temperature (APV). The data and the time series data of room temperature (PV) are set as input variables of the neural network, and the time series data of room temperature (PV') one step ahead of these input variables are set as output variables of the neural network, and the target output is Learning is done in advance to obtain variables. Here, the indoor temperature (PV') prediction method may use a method other than this embodiment.

Next, the judging unit 61a makes a re-judgment on the static pressure excess/deficiency information of “static pressure insufficient” and the static pressure excess/deficiency information of “adequate” extracted in step S302a (step S303a in FIG. 13). Here, for clarity of explanation, the VAV unit for which the latest static pressure excess or deficiency information is “static pressure insufficient” is denoted as 1-i, and the latest indoor temperature of the controlled area corresponding to the VAV unit (1-i) is denoted as PVi, and the indoor temperature set value. SPi, the first allowable temperature area of the controlled area corresponding to the VAV unit 1-i, A1i, the second allowable temperature area A2i, the room temperature with respect to the controlled area corresponding to the VAV unit 1-i. The predicted value of the indoor temperature predicted by the prediction unit 63 is set to PVi'. In addition, the VAV unit for which the latest static pressure excess/deficiency information is “adequate” is set to 1-j, the latest indoor temperature of the controlled area corresponding to the VAV unit (1-j) is set to PVj, the room temperature set value is set to SPj, and the VAV unit (1-j) is set to 1-j. The indoor temperature prediction unit 63 predicts the first allowable temperature area of the controlled area corresponding to -j) as A1j, the second allowable temperature area as A2j, and the controlled area corresponding to the VAV unit 1-j. The predicted value of an indoor temperature is taken as PVj'.

Regarding the VAV unit 1-i in which the static pressure excess/deficiency information is “static pressure insufficient”, the court 61a based on the indoor temperature set point SPi, the upper limit of the optimal indoor temperature during cooling, and the lower limit of the optimal indoor temperature during heating, A first allowable temperature range (A1i) and a second allowable temperature range (A2i) are set. Then, the judging unit 61a determines that at least one of the room temperature (PVi) and the predicted value (PVi' one step ahead) is within at least one of the first allowable temperature area (A1i) and the second allowable temperature area (A2i). If so, it is determined that the static pressure excess/deficiency information of “static pressure insufficient” should be changed to “adequate”. In addition, if the room temperature (PVi) and the predicted value (PVi' one step ahead) are outside the range of the first permissible temperature area (A1i) and the second permissible temperature area (A2i), the judgment unit 61a determines “static pressure insufficient” It is determined that the static pressure excess/deficiency information of 」 does not need to be changed.

In addition, the court 61a determines the VAV unit 1-j for which the static pressure excess/deficiency information is “adequate” based on the indoor temperature set point SPj, the upper limit of the optimal indoor temperature during cooling, and the lower limit of the optimal indoor temperature during heating. , set the first allowable temperature area (A1j) and the second allowable temperature area (A2j). And, if the predicted value PVj' of the room temperature one step ahead is outside the range of the first allowable temperature area A1j and the second allowable temperature area A2j, the judgment unit 61a determines the static pressure excess or deficiency of “appropriate”. It is determined that the information should be changed to “static pressure insufficient.” In addition, the judgment unit 61a determines that if the predicted value PVj' one step ahead is within at least one of the first allowable temperature area A1j and the second allowable temperature area A2j, the static pressure excess or deficiency of “appropriate” is determined. It is determined that the information does not need to be changed. The decision unit 61a re-determines the static pressure excess/deficiency information as described above for each VAV unit 1 of “static pressure insufficient” and for each VAV unit 1 of “adequate”.

The processing of steps S304 to S306 in FIG. 13 is the same as that described in the first embodiment. The analysis device 6a performs the processes of steps S300a to S302a, S308, S303a, and S304 to S306 as described above at regular intervals until the air conditioning is stopped (YES in step S307 of FIG. 13). Additionally, the analysis device 6a performs the processing in FIG. 13 for each air conditioner controller 5 (for each air conditioner 3).

In the first and second embodiments, each VAV controller 2 calculates the required air volume of the VAV unit 1 so that the indoor temperature of the corresponding controlled area matches the indoor temperature set value, and controls the VAV unit 1 to secure the required air volume. The damper opening of unit (1) is controlled. In contrast, each VAV controller 2 calculates the required air volume of the VAV unit 1 so that the indoor CO ₂ concentration measured by the CO ₂ sensor in the corresponding controlled area matches the CO ₂ concentration set value, and the requested air volume The damper opening of the VAV unit 1 may be controlled to ensure .

When performing such CO ₂ concentration control, only the allowable CO ₂ concentration area A1 is used as the allowable CO ₂ concentration area. The allowable CO ₂ concentration area A1 is an area where the difference between the indoor CO ₂ concentration and the indoor CO ₂ concentration set value ranges from negative infinity to Δppm (positive predetermined concentration). Regarding the VAV unit 1-i for which the static pressure excess/deficiency information is “static pressure insufficient”, the judgment unit 61 of the first embodiment determines that if the indoor CO ₂ concentration (PVi) is within the allowable CO ₂ concentration area (A1i), “ It is determined that the static pressure excess/deficiency information of “static pressure insufficient” should be changed to “adequate.” In addition, if the indoor CO ₂ concentration (PVi) is outside the allowable CO ₂ concentration area (A1i), the judgment unit 61 may determine that the static pressure excess/deficiency information of “static pressure deficiency” does not need to be changed (step in FIG. 11 S303).

Additionally, when performing CO ₂ concentration control, an indoor CO _{2 concentration prediction unit that predicts the indoor CO 2 concentration} at a future time in each controlled area may be installed instead of the indoor temperature prediction unit 63 in the second embodiment. . For prediction of CO ₂ concentration, for example, an autoregressive model, neural network, etc. are used.

The judgment unit 61a of the second embodiment determines the indoor CO ₂ concentration (PVi) and the indoor CO ₂ concentration prediction value (PVi' one step ahead) with respect to the VAV unit 1-i for which the static pressure excess/deficiency information is “static pressure insufficient”. ), if at least one of them is within the allowable CO ₂ concentration area (A1i), it is determined that the static pressure excess/deficiency information of “static pressure insufficient” should be changed to “adequate”. In addition, if the indoor CO ₂ concentration (PVi) and the predicted indoor CO ₂ concentration value (PVi' of one step ahead) are outside the first allowable temperature area (A1i), the court 61a provides static pressure excess/deficiency information of “static pressure insufficient”. It is sufficient to determine that there is no need to change (step S303a in FIG. 13).

In addition, the court 61a determines that, with respect to the VAV unit 1-j where the static pressure excess/deficiency information is “adequate”, the indoor CO ₂ concentration predicted value (PVi') one step ahead is outside the allowable CO ₂ concentration area (A1j). If so, it is determined that the static pressure excess or deficiency information of “adequate” should be changed to “static pressure insufficient.” In addition, the court 61a may determine that the static pressure excess/deficiency information of “adequate” does not need to be changed if the predicted indoor CO ₂ concentration value (PVi’) of the first step is within the allowable CO ₂ concentration area (A1j). (Step S303a in FIG. 13).

The VAV controller 2, the air conditioner controller 5, and the analysis devices 6 and 6a of the first and second embodiments each include a computer equipped with a CPU (Central Processing Unit), a memory device, and an interface to the outside, and these This can be realized by a program that controls hardware resources. An example of the configuration of this computer is shown in Figure 14. The computer is equipped with a CPU (300), a memory device (301), and an interface device (I/F) (302).

In the case of the VAV controller 2, the VAV unit 1, the air conditioner controller 5, and the temperature sensor of the controlled area are connected to the I/F 302. In the case of the air conditioner controller 5, the air conditioner 3, VAV controller 2, analysis devices 6, 6a, etc. are connected to the I/F 302. In the case of the analysis devices 6 and 6a, an air conditioner controller 5 and the like are connected to the I/F 302. A program for realizing the air conditioning control method of the present invention is stored in the memory device 301. The CPU 300 of each device executes the processing described in the first and second embodiments according to the program stored in the memory device 301.

The present invention can be applied to VAV air conditioning systems.

1: VAV unit 2: VAV controller
3: Air conditioner 4: Air supply duct
5: air conditioning controller 6, 6a: analysis device
7: Central system 20: Requested air volume calculation unit
21: Air volume control unit 22: Request air volume notification unit
23: Status notification unit 24: Room temperature notification unit
30: cooling coil 31: heating coil
32: Fan 50: Manipulated value output unit
51: Air volume calculation unit 52: Fan rotation speed determination unit
53: wind volume control unit 54: information creation unit
55: Fan rotation speed correction unit 60: Data accumulation unit
61, 61a: Tribunal 62: Static pressure excess and deficiency information change division
63: Indoor temperature prediction unit

Claims (18)

air conditioner,
VAV units provided in each controlled area,
A first control unit configured to control the damper opening of the VAV unit for each controlled area according to the required air volume determined according to the load situation of the controlled area;
a status notification unit configured to transmit static pressure excess/deficiency information to each VAV unit based on the opening degree of the damper;
a fan rotation speed determination unit configured to determine a fan rotation speed of the air conditioner based on a total required air volume obtained by adding up the required air volume values of each VAV unit;
a fan speed correction unit configured to correct the fan speed of the air conditioner based on total static pressure excess/deficiency information that integrates the static pressure excess/deficiency information of each VAV unit;
a second control unit configured to control the fan of the air conditioner to achieve a fan speed determined by the fan speed determination unit and corrected by the fan speed correction unit;
a decision unit configured to re-determine the static pressure excess or deficiency information based on the indoor temperature or indoor CO ₂ concentration of the controlled area before integrating the static pressure excess or deficiency information of each VAV unit;
A static pressure excess or deficiency information change unit configured to change the static pressure excess or deficiency information of each VAV unit based on the determination result of the court before integrating the static pressure excess or deficiency information of each VAV unit.
A VAV air conditioning system characterized by having a. The method of claim 1, wherein the court determines that, with respect to a VAV unit in which the static pressure excess or deficiency information indicates a static pressure deficiency, if the indoor temperature of the corresponding controlled area is within the allowable temperature range, the static pressure must be changed from insufficient to appropriate. VAV air conditioning system characterized by: The method of claim 2, wherein the allowable temperature area is an area where the difference between the indoor temperature of the controlled area and the indoor temperature set point during cooling is from negative infinity to a positive first predetermined temperature, and when heating, the difference between the indoor temperature of the controlled area and the indoor temperature set point is a range from negative infinity to a positive first predetermined temperature. A first allowable temperature area where the difference between the indoor temperature and the indoor temperature set point ranges from a negative first predetermined temperature to infinity, and the indoor temperature of the controlled area during cooling ranges from a negative infinity to a positive second predetermined temperature. It is an area up to the set temperature, and the indoor temperature of the controlled area during heating is comprised of a second allowable temperature area, which is an area from a positive third predetermined temperature to infinity,
When the indoor temperature of the controlled area corresponding to the VAV unit for which the static pressure excess/deficiency information indicates a static pressure deficiency is within at least one of the first permissible temperature area and the second permissible temperature area, the tribunal determines, A VAV air conditioning system characterized by determining that the static pressure must be changed from insufficient to appropriate. The method of claim 1, wherein the court determines that the difference between the indoor CO ₂ concentration of the corresponding controlled area and the indoor CO ₂ concentration set value with respect to the VAV unit for which the static pressure excess/shortage information indicates a static pressure deficiency ranges from negative infinity to positive infinity. A VAV air conditioning system characterized in that it determines that the static pressure must be changed from insufficient to appropriate when it is within the area up to the predetermined concentration. The method of claim 1, further comprising an indoor temperature prediction unit configured to predict the indoor temperature of each controlled area at a future time,
The court said that, with respect to a VAV unit in which the static pressure excess or deficiency information indicates a static pressure deficiency, if at least one of the room temperature and the room temperature predicted value of the corresponding controlled area is within the allowable temperature range, the static pressure must be changed from insufficient to appropriate. VAV air conditioning system characterized by determining. The method of claim 5, wherein the allowable temperature area is an area where the difference between the indoor temperature of the controlled area and the indoor temperature set point during cooling is from negative infinity to a positive first predetermined temperature, and when heating, the difference between the indoor temperature of the controlled area and the indoor temperature set point is a range from negative infinity to a positive first predetermined temperature. A first allowable temperature area where the difference between the indoor temperature and the indoor temperature set point ranges from a negative first predetermined temperature to infinity, and the indoor temperature of the controlled area during cooling ranges from a negative infinity to a positive second predetermined temperature. It is an area up to the set temperature, and the indoor temperature of the controlled area during heating is comprised of a second allowable temperature area, which is an area from a positive third predetermined temperature to infinity,
The judgment unit determines that at least one of the indoor temperature and the indoor temperature predicted value of the corresponding controlled area with respect to the VAV unit for which the static pressure excess/shortage information indicates a static pressure deficiency is at least one of the first allowable temperature area and the second allowable temperature area. A VAV air conditioning system characterized in that, if it is within one area, it is determined that the static pressure should be changed from insufficient to appropriate. The method according to claim 5 or 6, wherein, with respect to a VAV unit for which the static pressure excess or deficiency information indicates an appropriate condition, if the predicted indoor temperature value of the corresponding controlled area is outside the permissible temperature range, the determination unit determines the static pressure deficiency from the appropriate value. VAV air conditioning system, characterized in that it determines that it must be changed to. The method of claim 1, further comprising an indoor CO ₂ concentration prediction unit configured to predict the indoor CO ₂ concentration at a future time in each controlled area,
The tribunal determines in advance that the difference between the indoor CO ₂ concentration or the indoor CO ₂ concentration predicted value and the indoor CO 2 concentration set value in the corresponding controlled area with respect to the VAV unit for which the static pressure excess or deficiency information indicates a static pressure deficiency ranges from negative infinity to positive. A VAV air conditioning system characterized in that it determines that the static pressure must be changed from insufficient to appropriate when the concentration is within the range. The method of claim 8, wherein the court determines that the difference between the predicted indoor CO ₂ concentration value of the corresponding controlled area and the set indoor CO ₂ concentration value with respect to the VAV unit for which the static pressure excess/deficiency information indicates appropriateness ranges from negative infinity to positive preliminaries. A VAV air conditioning system characterized in that it determines that the pressure must be changed from adequate to insufficient static pressure when the concentration is outside the range of the set concentration. A first step of controlling the damper opening of the VAV unit for each controlled area according to the required air volume determined according to the load situation of the controlled area;
A second step of transmitting static pressure excess/deficiency information to each VAV unit based on the opening degree of the damper;
A third step of determining the fan rotation speed of the air conditioner that supplies air to the VAV unit based on the total required air volume obtained by adding up the required air volume values of each VAV unit;
A fourth step of correcting the fan rotation speed of the air conditioner based on total static pressure excess or deficiency information that integrates the static pressure excess or deficiency information of each VAV unit;
A fifth step of controlling the fan of the air conditioner to achieve the fan rotation speed determined in the third step and corrected in the fourth step,
A sixth step of re-determining the static pressure excess or deficiency information based on the indoor temperature or indoor CO ₂ concentration of the controlled area before integrating the static pressure excess or deficiency information of each VAV unit;
A seventh step of changing the static pressure excess or deficiency information of each VAV unit based on the determination result of the sixth step before integrating the static pressure excess or deficiency information of each VAV unit.
An air conditioning control method comprising: The method of claim 10, wherein in the sixth step, if the indoor temperature of the controlled area corresponding to the VAV unit for which the static pressure excess/shortage information indicates a static pressure deficiency is within the allowable temperature range, the static pressure must be changed from insufficient to appropriate. An air conditioning control method comprising the step of determining. The method of claim 11, wherein the allowable temperature area is an area where the difference between the indoor temperature of the controlled area and the indoor temperature set point during cooling is from negative infinity to a positive first predetermined temperature, and when heating, the difference between the indoor temperature of the controlled area and the indoor temperature set point is a range from negative infinity to a positive first predetermined temperature. A first allowable temperature area where the difference between the indoor temperature and the indoor temperature set point ranges from a negative first predetermined temperature to infinity, and the indoor temperature of the controlled area during cooling ranges from a negative infinity to a positive second predetermined temperature. It is an area up to the set temperature, and the indoor temperature of the controlled area during heating is comprised of a second allowable temperature area, which is an area from a positive third predetermined temperature to infinity,
The sixth step is performed when the indoor temperature of the controlled area corresponding to the VAV unit for which the static pressure excess/deficiency information indicates a static pressure deficiency is within at least one of the first allowable temperature area and the second allowable temperature area. , An air conditioning control method comprising the step of determining that the static pressure should be changed from insufficient to appropriate. The method of claim 10, wherein, in the sixth step, the difference between the indoor CO ₂ concentration of the corresponding controlled area and the indoor CO ₂ concentration set value with respect to the VAV unit for which the static pressure excess/deficiency information indicates a static pressure deficiency ranges from negative infinity to positive. An air conditioning control method comprising the step of determining that the static pressure should be changed from insufficient to appropriate when the concentration is within a predetermined concentration area. The method of claim 10, further comprising an eighth step of predicting the indoor temperature of each controlled area at a future time,
In the sixth step, if at least one of the indoor temperature and the indoor temperature predicted value of the corresponding controlled area for the VAV unit in which the static pressure excess or insufficient information indicates a static pressure shortage is within the allowable temperature range, the static pressure must be changed from insufficient to appropriate. An air conditioning control method characterized by determining that The method of claim 14, wherein the allowable temperature area is an area where the difference between the indoor temperature of the controlled area and the indoor temperature set point during cooling is from negative infinity to a positive first predetermined temperature, and when heating, the difference between the indoor temperature of the controlled area and the indoor temperature set point is a range from negative infinity to a positive first predetermined temperature. The difference between the indoor temperature and the indoor temperature set point is a first allowable temperature range that ranges from a negative first predetermined temperature to infinity, and the indoor temperature of the controlled area during cooling ranges from a negative infinity to a positive second preset temperature. It is an area up to the set temperature, and the indoor temperature of the controlled area during heating is comprised of a second allowable temperature area, which is an area from a positive third predetermined temperature to infinity,
In the sixth step, with respect to the VAV unit in which the static pressure excess/deficiency information indicates a static pressure deficiency, at least one of the indoor temperature and the indoor temperature predicted value of the corresponding controlled area is selected from among the first allowable temperature area and the second allowable temperature area. An air conditioning control method comprising the step of determining that the static pressure should be changed from insufficient to appropriate when it is within at least one area. The method according to claim 14 or 15, wherein in the sixth step, when the indoor temperature predicted value of the corresponding controlled area for the VAV unit for which the static pressure excess/deficiency information indicates appropriate is outside the allowable temperature region, the static pressure is adjusted from the appropriate. An air conditioning control method comprising the step of determining that a change is required due to a shortage. The method of claim 10, further comprising an eighth step of predicting the indoor CO ₂ concentration at a future time in each controlled area,
In the sixth step, the difference between the indoor CO ₂ concentration or indoor CO ₂ concentration predicted value and the indoor CO 2 concentration set value in the corresponding controlled area with respect to the VAV unit in which the static pressure excess or deficiency information indicates a static pressure deficiency increases from negative infinity to positive advance. An air conditioning control method comprising the step of determining that the static pressure should be changed from insufficient to appropriate when the concentration is within the area up to the predetermined concentration. The method of claim 17, wherein in the sixth step, the difference between the indoor CO ₂ concentration predicted value and the indoor CO ₂ concentration set value of the corresponding controlled area with respect to the VAV unit for which the static pressure excess/deficiency information indicates appropriateness ranges from negative infinity to positive. An air conditioning control method comprising the step of determining that the pressure should be changed from adequate to insufficient static pressure when the concentration is outside the range up to the predetermined concentration.

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