JP2020098055A - Air conditioning controller and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of heat accumulation that may occur when the air volume from an air conditioner does not change. SOLUTION: The present condition information collecting unit 11 that collects the room temperature, the set temperature, and the air volume from the VAV at the present time and a predetermined period before according to the instruction, and when the VAV air volume control is executed in the normal mode, If the temperature difference between the room temperature and the set temperature is equal to or more than a certain value, and the air volume between the present time and the predetermined period before is the maximum air volume of VAV, the temperature difference between the present room temperature and the set temperature is less than the certain value. If both the current air volume and the air volume before the predetermined period are the minimum air volume of the VAV, or if the temperature difference between the current room temperature and the set temperature is a certain value or more and the air volume between the current and the predetermined period is both the maximum air volume of the VAV. When the air volume is the same as the minimum air volume, the air volume control unit 12 changes the current air volume from the VAV so as to fluctuate. [Selection diagram] Figure 2

Description

The present invention relates to an air conditioning control device and a program, and in particular, to controlling air flow from an air conditioner.

In a central air conditioning system installed in an office building, a VAV (Variable Air Volume system) with adjustable air volume is often used for blowing air into a living room. In VAV, the blowing amount is adjusted so as to blow air into the room from the air outlet by adjusting the opening degree of the damper based on the difference between the set temperature of the room and the measured temperature. For VAV, the maximum air volume and the minimum air volume are determined by the specifications. For example, if the difference between the set temperature of the room and the measured temperature is large, the damper is fully opened to the maximum air volume so that the temperature difference quickly decreases. To drive. On the other hand, if the difference between the set temperature of the room and the measured temperature is small, the opening degree of the damper is reduced to operate with the minimum air volume.

JP, 10-253135, A JP, 10-076832, A

By the way, when the difference between the set temperature of the room and the measured temperature does not change, in the VAV, the operation is continued with the same air volume. Then, the convection becomes constant, the air does not circulate in a part of the room, and heat accumulation may occur.

An object of the present invention is to prevent the occurrence of heat accumulation that may occur when the air volume from the air conditioner does not change.

The air conditioning control device according to the present invention adjusts the air volume of the air sent to the room to adjust the air volume so that the air flow from the air conditioner fluctuates when a change in the air volume from the air conditioner for air conditioning is not detected for the first predetermined time. It is characterized by having an air volume control means for controlling the air volume to be changed.

Further, the air volume control means is such that a difference between the measured temperature and the set temperature of the room is a predetermined value or more at the time when the first predetermined time elapses, and the air conditioner is in the first predetermined time. When operating with the maximum air volume without change, the air volume from the air conditioner is reduced to the first predetermined air volume over the second predetermined time and then increased to the maximum air volume over the third predetermined time. It is characterized by controlling the air volume.

Further, the air volume control means is configured such that the difference between the measured temperature of the room and the set temperature is less than a certain value at the time when the first predetermined time has elapsed, and the air conditioner is operating during the first predetermined time. When operating with the minimum air volume without change, the air volume from the air conditioner is increased to the second predetermined air volume over the fourth predetermined time and then reduced to the minimum air volume over the fifth predetermined time. It is characterized by controlling the air volume.

Further, the air volume control means is such that a difference between the measured temperature and the set temperature of the room is a predetermined value or more at the time when the first predetermined time elapses, and the air conditioner is in the first predetermined time. When operating at an air volume between the maximum air volume and the minimum air volume without changing, the air volume from the air conditioner is characterized by performing air volume control so as to increase or decrease at least one from the current air volume. ..

Further, when the current air volume of the air conditioner is closer to the minimum air volume than the maximum air volume of the air conditioner, the air volume control means controls the air volume to increase and then decrease the air volume from the air conditioner. To do.

The air volume control means increases the air volume from the air conditioner to a predetermined third predetermined air volume over a sixth predetermined time, and then reduces the air volume to a fourth predetermined air volume over a seventh predetermined time. Further, it is characterized in that the air volume is controlled to increase to the current air volume over an eighth predetermined time.

Further, when the current air volume of the air conditioner is closer to the maximum air volume than the minimum air volume of the air conditioner, the air volume control means controls the air volume so that the air volume from the air conditioner is reduced and then increased. To do.

The air volume control means reduces the air volume from the air conditioner to a fifth predetermined air volume over a ninth predetermined time, and then increases the air volume up to a sixth predetermined air volume over a tenth predetermined time. It is characterized in that the air volume is controlled so that the air volume is reduced to the current air volume over an eleventh predetermined time.

The program according to the present invention controls a computer to adjust the amount of air sent to a room to perform air conditioning, and when a change in the amount of air from an air conditioner is not detected for a first predetermined time, the amount of air blown from the air conditioner fluctuates. To function as an air volume control unit that controls the air volume.

According to the present invention, it is possible to prevent the occurrence of heat accumulation that may occur when the air volume from the air conditioner does not change.

1 is a schematic diagram of an air conditioner system to which an embodiment of an air conditioning control device according to the present invention is applied. It is a block diagram of an air conditioning controller in the present embodiment. It is a figure which shows the relationship of a temperature difference and air volume when VAV is normally controlled by the normal process part in this Embodiment. It is a flow chart which shows air volume control processing in this embodiment. It is a flowchart following FIG. 4A. It is a flow chart which shows processing at the time of maximum air volume in this embodiment. It is a figure which shows the transition of the air volume during the process of the maximum air volume in this Embodiment. It is a flow chart which shows processing at the time of the minimum air volume in this embodiment. It is a figure which shows the transition of the air volume while the air volume minimum time process in this Embodiment is performed. It is a flow chart which shows the processing at the time of air volume in the present embodiment. It is a figure which shows the transition of the air volume during execution of the air volume intermediate time process in this Embodiment. It is a figure which shows the other transition of the air volume during execution of the air volume intermediate|middle time process in this Embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of an air conditioner system according to the present embodiment. FIG. 1 shows an air conditioner system having an air conditioning controller 1, an AHU (Air Handling Unit) 2, VAVs 3a and 3b, VAV controllers 4a and 4b, remote controllers 5a and 5b, valves 6a and 6b, and an inverter (INV) 7. ing. Note that constituent elements not used in the description of the present embodiment are appropriately omitted from the drawings. Further, when it is not necessary to distinguish among a plurality of constituent elements such as VAV3a and VAV3b, they are collectively referred to as "VAV3".

The AHU 2 has a cold water coil 21, a hot water coil 22 and a fan (blower) 23, and after adjusting the temperature of the outside air by exchanging heat with the cold and warm water supplied through the valve 6, the AHU 2 is sent to the VAV 3 by the fan 23. Supply. The valves 6a and 6b adjust the amount of water supplied to the cold water coil 21 and the hot water coil 22 under the control of the air conditioning controller 1.

The VAV 3 sends the air supplied from the AHU 2 to the room 8. The VAV controller 4 controls the amount of air supplied to the room 8, that is, the air volume by adjusting the opening degree of a damper (not shown) built in the corresponding VAV 3. When operating, the VAV 3 operates between the maximum air volume and the minimum air volume according to the specifications. The inverter 7 adjusts the air volume (blowing amount) of the fan 23 of the AHU 2 under the control of the air conditioning controller 1.

The air conditioning controller 1 is connected to the valve 6, the inverter 7, the VAV controller 4, and the remote controller 5 via a signal line, and transmits and receives a data signal or a control signal to control the operation of the air conditioner including the AHU 2 and the VAV 3. It is a control means.

The remote controller 5 is a user interface used when a resident sets the temperature of the room 8 in the air conditioner. The remote controllers 5a and 5b correspond to the VAVs 3a and 3b, respectively.

The present embodiment is characterized by the air volume control of the VAV 3 under the control of the air conditioning controller 1, and the configuration of the air conditioner system in the present embodiment may be the same as before. In FIG. 1, it is illustrated that two VAVs 3 are installed in one room 8, but the number of installed VAVs 3 is not limited to this example, and may be one or more.

FIG. 2 is a block configuration diagram of the air conditioning controller 1 in the present embodiment. The air conditioning controller 1 according to the present embodiment has a current state information collection unit 11, an air volume control unit 12, and a control unit 13. Note that constituent elements not used in the description of the present embodiment are omitted from the drawings.

The present situation information collecting unit 11 collects present situation information necessary for the air volume control by the air volume control unit 12. The present condition information collected in this embodiment includes room temperature (measured temperature) at a position corresponding to each VAV 3a, 3b in the room 8, temperature of the room 8 (set temperature) set by each remote controller 5a, 5b, and VAV controller. Each air volume (measured air volume) of each VAV 3a, 3b measured by 4a, 4b is included. The measured temperature may be acquired from the temperature measured by a temperature sensor mounted on each VAV controller 4a, 4b or remote controller 5a, 5b (not shown), or by separately providing a temperature sensor at a position corresponding to each VAV 3a, 3b. You may do so.

The air volume control unit 12 cooperates with the VAV controller 4 to control the air volume of the VAV 3. The air volume control unit 12 can perform different air volume control for each VAV3. The air volume control unit 12 includes a normal processing unit 121, a maximum air volume processing unit 122, a minimum air volume processing unit 123, and an intermediate air volume processing unit 124 for operating the VAV 3 in different modes. The normal processing unit 121 executes a process for controlling the air volume in the normal mode that has been conventionally executed. Therefore, the present embodiment is characterized in that the maximum air volume processing unit 122, the minimum air volume processing unit 123, and the intermediate air volume processing unit 124 are added to the conventional configuration.

As described above, the VAV 3 can adjust the air volume between the maximum air volume and the minimum air volume according to the specifications. The air volume control unit 12 causes the current state information collection unit 11 to collect the current state information at a predetermined timing as described later, but the air volume maximum time processing unit 122 included in the air volume control unit 12 is based on the air volume maximum time process described later. By performing the air volume control, the difference between the measured temperature and the set temperature of the room 8 is equal to or more than a certain value at the time when the first predetermined time has elapsed, and the VAV3 does not change during the first predetermined time. When operating with the maximum air volume, the VAV 3 is operated in the maximum air volume mode. The first predetermined time will be described later in detail. The minimum air volume processing unit 123 executes the air volume control based on the minimum air volume processing described below, so that the difference between the measured temperature of the room 8 and the set temperature is less than a certain value at the time when the first predetermined time has elapsed. If yes, and the VAV 3 is operating at the minimum air volume without changing during the first predetermined time, the VAV 3 is operated in the minimum air volume mode. The air volume intermediate time processing unit 124 executes air volume control based on the air volume intermediate time processing, which will be described later, so that when the first predetermined time has elapsed, the difference between the measured temperature of the room 8 and the set temperature is not less than a certain value. If yes, and if the VAV 3 is operating at the air volume between the maximum air volume and the minimum air volume without changing during the first predetermined time, the VAV 3 is operated in the air volume intermediate mode.

The control unit 13 executes operation control regarding operation and stop of the air conditioning controller 1, operation control of components included in the air conditioning controller 1, and the like.

The air conditioning controller 1 in the present embodiment can be realized by a conventional general-purpose hardware configuration. That is, the air conditioning controller 1 includes a CPU, a ROM, a RAM as a storage unit, a hard disk drive (HDD), and a computer having a network interface as a communication unit that communicates with other devices. A user interface may be provided if necessary. Each of the constituent elements 11 to 13 in the air conditioning controller 1 is realized by a cooperative operation of a computer built in the air conditioning controller 1 and a program operating by a CPU mounted on the computer. The program used in the present embodiment can be provided not only by communication means but also by being stored in a computer-readable recording medium such as a USB memory. The program provided from the communication unit or the recording medium is installed in the computer, and the CPU of the computer sequentially executes the program to realize various processes.

FIG. 3 is a diagram showing the relationship between the temperature difference and the air volume when the normal processing unit 121 normally controls the VAV 3. The temperature difference means the difference between the set temperature and the measured temperature (room temperature), but the VAV3 operates at the minimum air volume (min) when the temperature difference is smaller than a predetermined threshold value (T1) during operation, and When the difference becomes equal to or larger than the threshold value, the air amount is adjusted according to the temperature difference until the maximum air amount (max) is reached. As shown in FIG. 3, when the temperature difference continues to be less than T1 or T2 or more, the VAV 3 continuously operates at the minimum air volume or the maximum air volume. Further, even if there is no change in the temperature difference between the minimum air volume and the maximum air volume, the air in the room 8 is supplied from the VAV 3 at a constant air volume. As described above, when the air volume does not continuously change, constant convection occurs in the room 8, and depending on the location of the room 8, air does not circulate, which is a so-called heat pool.

Therefore, the present embodiment is characterized in that when the change in the air volume from the VAV 3 is not detected for the first predetermined time, the air volume is controlled by changing the air volume from the VAV 3 so that the blown air fluctuates. .. Hereinafter, the air volume control process in the present embodiment will be described using the flowcharts shown in FIGS. 4A and 4B. The air volume control process in the present embodiment is started when the operation of the air conditioner including the VAV 3 is started, and is continuously executed until the end instruction is given. The wind direction is fixed.

The processes of steps 101 and 102 in the air conditioning controller 1 are executed for each VAV3, but the same process may be repeatedly executed for each VAV3, and thus duplicated description will be omitted. Further, for convenience of explanation, it is assumed that the VAVs 3 in the present embodiment all have the same capability, and that the maximum air volume is 1000 m ³ /h and the minimum air volume is 200 m ³ /h.

When the operation of the air conditioner is started, the VAV 3 starts operating in the normal mode by the normal processing unit 121 (step 101). Since the operation of the air conditioner is not stable for a while after the start of operation, the air conditioner continues to operate in the normal mode (step 102). Although depending on the model of the air conditioner, the operation in the normal mode is maintained for, for example, 30 minutes to 60 minutes.

Then, after the operation of the air conditioner is stabilized, the air volume control unit 12 causes the current situation information collection unit 11 to collect the set temperature, the measured temperature (room temperature), and the air volume (measured air volume) from the VAV 3 at the current remote control 5 ( Step 103). If the processing target is the VAV 3a, the current situation information collection unit 11 acquires the set temperature for the remote controller 5a. In addition, the measured temperature (room temperature) in the present embodiment does not mean the temperature of the entire room 8, but a temperature sensor (VAV3a or remote controller 5a installed corresponding to the VAV3a to be processed. The temperature measured by a temperature sensor or a temperature sensor installed near the VAV 3a).

Then, the air volume control unit 12 maintains the current operating state, here, the operation in the normal mode for a predetermined time after acquiring the current state information (step 104). The predetermined time referred to here corresponds to the above-mentioned first predetermined time. When the predetermined time has elapsed, the air volume control unit 12 acquires the current situation information similarly to step 103 (step 105).

Here, the first predetermined time is a length of time in which it is estimated that heat accumulation may occur when the air is continuously supplied to the room 8 with the same air volume without changing the VAV 3. .. The first predetermined time may be appropriately set with reference to the capacity of the VAV 3, the size of the room 8 and the like. In this embodiment, it is set to 10 minutes, for example.

Subsequently, the air volume control unit 12 calculates the temperature difference between the set temperature and the measured temperature included in the present condition information acquired in step 105 (step 106). Then, the measured air volume contained in the current situation information acquired in step 103 and the measured air volume contained in the current situation information acquired in step 105 are obtained.

Here, when the calculated temperature difference is equal to or larger than a certain value and both the measured air volumes acquired in steps 103 and 105 are the maximum air volumes (Y in step 107), the maximum air volume processing unit 122 is shown in FIG. The VAV 3 is operated in the maximum air volume mode by executing the maximum air volume processing (step 108). The constant value used in the present embodiment is a threshold value for determining that the temperature difference is large (small). In this embodiment, about 2° C. is assumed.

In addition, in the present embodiment, when the air volumes measured at the beginning (step 103) and the end (step 105) of the first predetermined time are both the maximum air volume, the air volume from VAV3 is maintained during the first predetermined time. It is estimated that it was always operating at the maximum air volume without change. Of course, the air volume from the VAV 3 may be periodically measured during the first predetermined period.

The maximum air volume processing unit 122 calculates the variation width of the air volume according to the specified variable width ratio (step 1081). For example, when the variable width ratio is set to 10%, 10% of 800 m ³ /h, which is the difference between the maximum air volume and the minimum air volume, that is, 80 m ³ /h is calculated as the variation width of the air volume.

FIG. 6 is a graph showing the transition of the air volume during the maximum air volume processing. In FIG. 6, the horizontal axis represents the elapsed time from the start of the maximum air volume processing, and the vertical axis represents the air volume at each time point. When the air volume maximum time processing unit 122 starts the processing in the air volume maximum time mode, the current air volume (maximum air volume) is changed by the fluctuation width (80 m ³ /h) over the second predetermined time, that is, 920 m ³ /h. (Step 1082). After that, the maximum air volume processing unit 122 increases the volume up to the air volume at the start of processing (maximum air volume) over a third predetermined time (step 1083). The target air volume of 920 m ³ /h when the air volume is reduced and the maximum air volume (1000 m ³ /h) of which the air volume is increased is the required air volume required by the air conditioning controller 1 to the VAV controller 4. Although it is different from the measured air volume, the VAV controller 4 controls the VAV 3 so that the measured air volume matches the required air volume.

In the present embodiment, VAV3 is formed when the condition shown in step 107, that is, when the temperature difference between the set temperature and the measured temperature is a certain value or more and the air volume is the maximum for the first predetermined time. We speculated that heat accumulation was occurring in the air-conditioning environment, and forcedly changed the air volume to cause fluctuations. As a result, it becomes possible to eliminate heat accumulation due to changes in convection in the air-conditioned environment formed by the VAV 3.

Although the second predetermined time and the third predetermined time are both set to 300 seconds in FIG. 6, it may be set to a time length that is considered to be able to eliminate the heat accumulation. It is not necessary to limit to the example (300 seconds). Also, it is not necessary to set the same time. Further, in the present embodiment, the fluctuation range is calculated based on the maximum air volume and the minimum air volume based on the specifications of VAV3 and the variable width ratio, and the fluctuation width is set as the first predetermined air volume. However, the first predetermined air volume is A variable width ratio different from those exemplified above may be used, or may be set by a method other than this. It is considered that increasing the variable width ratio causes a large change in the air volume, which helps eliminate the heat accumulation. On the other hand, the temperature difference between the set temperature and the measured temperature may be less likely to decrease, so the variable width ratio may be reduced. Must be set to an appropriate value.

When the above-described maximum air volume processing is executed, the air volume control unit 12 temporarily holds the current situation information acquired in step 105 as the information collected immediately before (step 109), and then acquires the current situation information similarly to step 105 ( Step 110). Then, when the temperature difference between the set temperature and the measured temperature included in the acquired present condition information is equal to or larger than the threshold value (constant value) used in step 107 (Y in step 111), the air volume control unit 12 proceeds to step 107. Transition. On the other hand, when the temperature difference is less than the threshold value (N in step 111), the air volume control unit 12 shifts to the normal mode by causing the normal processing unit 121 to perform the air volume control (step 122).

In the present embodiment, the air volume is changed in order to eliminate the heat accumulation that is presumed to have occurred, but whether or not the heat accumulation was actually eliminated can be confirmed by performing some work separately. Not not. Therefore, in the present embodiment, the temperature difference between the set temperature and the measured temperature is equal to or more than the threshold value before the air volume maximum time processing is performed, and the temperature difference after the air volume maximum time processing is performed is the threshold value or more, It was assumed that the heat accumulation had not yet been resolved, and the process was returned to step 107. On the other hand, when the temperature difference becomes less than the threshold value, it is considered that the heat accumulation has been resolved, and the mode is changed from the maximum air volume mode to the normal mode.

Subsequently, when the calculated temperature difference is equal to or greater than a certain value and the measured air volumes acquired in steps 103 and 105 are not both the maximum air amounts (N in step 107), the calculated temperature difference is less than the certain value. When both the measured air volumes acquired in steps 103 and 105 are the minimum air volumes (Y in step 112), the minimum air volume processing unit 123 executes the minimum air volume processing shown in FIG. It is operated in the mode (step 113). In the present embodiment, when the air volumes measured at the beginning (step 103) and the end (step 105) of the first predetermined time are both the minimum air volumes, the air volume from VAV3 is changed during the first predetermined time. It is presumed that it was always operating with the minimum air volume without any action. Of course, the air volume from the VAV 3 may be periodically measured during the first predetermined period.

The minimum air volume processing unit 123 calculates the variation width of the air volume according to the designated variable width ratio (step 1131). For example, when the variable width ratio is set to 10%, 10% of 800 m ³ /h, which is the difference between the maximum air volume and the minimum air volume, that is, 80 m ³ /h is calculated as the variation width of the air volume.

FIG. 8 is a graph showing the transition of the air volume in the minimum air volume processing. In FIG. 8, the horizontal axis represents the elapsed time since the minimum air volume processing was started, and the vertical axis represents the air volume at each time point. When the air volume minimum time processing unit 123 starts the processing in the air volume minimum time mode, it takes the fourth predetermined time to change the current air volume (minimum air volume) by the fluctuation range (80 m ³ /h), that is, 280 m ³ /h. (Step 1132). After that, the minimum air volume processing unit 123 reduces the air volume to the air volume (minimum air volume) at the start of the processing over the fifth predetermined time (step 1133).

In the present embodiment, VAV3 is formed when the condition shown in step 112, that is, the temperature difference between the set temperature and the measured temperature is equal to or less than a certain value, and the air volume is the minimum during the first predetermined time. It is assumed that heat accumulation occurs in the air-conditioning environment, and as in the maximum air volume mode, the air volume is forcibly changed so that it fluctuates and the heat accumulation is eliminated. As a result, it becomes possible to eliminate heat accumulation due to changes in convection in the air-conditioned environment formed by the VAV 3.

Although the fourth predetermined time and the fifth predetermined time are both set to 300 seconds in FIG. 8, it may be set to a time length that is considered to be able to eliminate heat accumulation. It is not necessary to limit to the example (300 seconds). Also, it is not necessary to set the same time. Further, in the present embodiment, the fluctuation range is calculated based on the maximum air volume and the minimum air volume based on the specifications of VAV3 and the variable width ratio, and the fluctuation width is set as the second predetermined air volume. However, the second predetermined air volume is A variable width ratio different from that illustrated above or a variable width ratio different from the one in which the first predetermined air volume is obtained may be used, or may be set by a method other than this.

When the above-described minimum air volume processing is executed, the air volume control unit 12 temporarily holds the current situation information acquired in step 105 as the information collected immediately before (step 114), and acquires the current situation information similarly to step 105 (step). 115). Then, when the temperature difference between the set temperature and the measured temperature included in the acquired present condition information is not more than the threshold value (constant value) used in step 107 (Y in step 116), the air volume control unit 12 proceeds to step 107. Transition. On the other hand, when the temperature difference is larger than the threshold value (N in step 116), the air volume control unit 12 shifts to the normal mode by causing the normal processing unit 121 to perform the air volume control (step 122).

Similar to the case of the maximum air volume mode, in the case of the minimum air volume mode, if the temperature difference before and after the minimum air volume processing is both below the threshold value and there is no change, the heat accumulation is not resolved. On the other hand, it is considered that the heat accumulation has been resolved when the temperature difference becomes larger than the threshold value, and the mode is changed from the minimum air volume mode to the normal mode. In the minimum air volume mode, the temperature difference between the set temperature and the measured temperature becomes larger than the threshold value, which may be contrary to the air conditioner controlling the measured temperature (room temperature) to approach the set temperature. Although conceivable, in the present embodiment, the elimination of the heat accumulation is given priority, and after the elimination of the heat accumulation, the air-conditioning control is performed so as to shift to the normal mode and eliminate the temperature difference.

Subsequently, when the calculated temperature difference is less than or equal to a certain value and the measured air volumes acquired in steps 103 and 105 are not both the minimum air amounts (N in step 112), the calculated temperature difference is more than or equal to the certain value. And when the measured air volume acquired in each of the steps 103 and 105 is neither the maximum air volume nor the minimum air volume, that is, when the air volume is between the maximum air volume and the minimum air volume (Y in step 117), the air volume intermediate-time processing unit 124 The VAV 3 is operated in the mid-air flow mode by executing the mid-air flow processing shown in FIG. 9 (step 118). In the present embodiment, when the air volumes measured at the beginning (step 103) and the end (step 105) of the first predetermined time both show the same air volume except the maximum air volume and the minimum air volume, the air volume from VAV3 is It is estimated that the air volume was constantly operating without being changed for the first predetermined time.

The air volume intermediate-time processing unit 124 calculates the fluctuation range of the air volume according to the specified variable width ratio (step 1181). For example, when the variable width ratio is set to 10%, 10% of 800 m ³ /h, which is the difference between the maximum air volume and the minimum air volume, that is, 80 m ³ /h is calculated as the variation width of the air volume.

Although the direction to change first is decided, that is, decrease in the case of the maximum air volume and increase in the case of the minimum air volume, but in the case of the air volume between the maximum air volume and the minimum air volume, either increase or decrease from the current air volume is performed. It is possible. Therefore, in the present embodiment, the current air volume (measured air volume acquired in step 105) is used to determine whether to increase or decrease the volume first.

10 and 11 are graphs showing the transition of the air volume in the air volume intermediate time processing. In FIGS. 10 and 11, the horizontal axis represents the elapsed time from the start of the air volume mid-time process, and the vertical axis represents the air volume at each point. The air volume intermediate between the maximum air volume (1000 m ³ /h) and the minimum air volume (200 m ³ /h) (intermediate air volume) is 600 m ³ /h, but the current air volume is smaller than the intermediate air volume (Y in step 1182). As shown in FIG. 10, the air volume intermediate-time processing unit 124 controls the air volume so that the air volume from the VAV 3 is increased and then decreased. Specifically, the air volume from VAV3 is increased by the fluctuation width (80 m ³ /h) over the sixth predetermined time (step 1183). Thereafter, the air volume intermediate-time processing unit 124 reduces the air volume by twice the fluctuation width over the seventh predetermined time (step 1133). Then, the air volume intermediate-time processing unit 124 increases the air volume to the air volume at the processing start time (the measured air volume acquired in step 105) over the eighth predetermined time (step 1185).

The sixth predetermined period and the eighth predetermined period are both set to 300 seconds in FIG. 10, and the seventh predetermined period in which the air volume is changed with a double fluctuation range is set to 600 seconds, which is double that. However, it is not necessary to limit to this example as long as it is set to a time length that is considered to be able to eliminate heat accumulation. Also, it is not necessary to set the same time. Further, in the present embodiment, the fluctuation range is calculated based on the maximum air volume and the minimum air volume based on the specifications of VAV3 and the variable width ratio, and this fluctuation width is the third predetermined air volume, and the double fluctuation width is the fourth predetermined width. Although the air volume is used, the third and fourth predetermined air volumes may use variable width ratios different from those exemplified above, or may be set by other methods. Further, when the air volume to be changed exceeds the maximum air volume or the minimum air volume in the fluctuation range set by calculation, the air volume may be controlled so that the VAV 3 is operated at the maximum air volume or the minimum air volume while exceeding the maximum air volume or the minimum air volume.

On the other hand, when the current air volume is equal to or greater than the intermediate air volume (N in step 1182), the air volume intermediate time processing unit 124 controls the air volume so that the air volume from the VAV 3 is decreased and then increased, as shown in FIG. Specifically, the air volume from VAV3 is reduced by a variation width (80 m ³ /h) over the ninth predetermined time period (step 1186). Thereafter, the air volume intermediate-time processing unit 124 increases the air volume by twice the fluctuation width over the tenth predetermined time (step 1187). Then, the air volume intermediate-time processing unit 124 reduces the air volume to the air volume at the processing start time over the eleventh predetermined time (step 1188).

The ninth predetermined period and the eleventh predetermined period are both set to 300 seconds in FIG. 11, and the tenth predetermined period in which the air volume is changed with a double fluctuation width is set to 600 seconds, which is twice that. However, it is not necessary to limit to this example as long as it is set to a time length that is considered to be able to eliminate heat accumulation. Also, it is not necessary to set the same time. Further, in the present embodiment, the fluctuation range is calculated based on the maximum air volume and the minimum air volume based on the specifications of VAV3 and the variable width ratio, and this fluctuation width is the fifth predetermined air volume, and the double fluctuation width is the sixth predetermined air volume. Although the air volume is used, the fifth and sixth predetermined air volumes may use variable width ratios different from those exemplified above, or may be set by other methods.

In the mid-air volume mode, the air volume is fluctuated by fluctuating in both the increasing and decreasing directions centering on the air volume at the start of processing, but it may be changed in one direction like the maximum and minimum air volumes. Good.

When the above-described air volume intermediate time processing is executed, the air volume control unit 12 temporarily holds the current situation information acquired in step 105 as the information collected immediately before (step 119), and acquires the current situation information in the same manner as in step 105 (step). 120). Then, when the temperature difference between the set temperature and the measured temperature included in the acquired present condition information is equal to or larger than the threshold value (constant value) used in step 107 (Y in step 121), the air volume control unit 12 proceeds to step 107. Transition. On the other hand, when the temperature difference is smaller than the threshold value (N in step 121), the air volume control unit 12 shifts to the normal mode by causing the normal processing unit 121 to perform the air volume control (step 122).

Similar to the case of the maximum air volume mode, in the intermediate air volume mode, if the temperature difference before and after the intermediate air volume processing is both above the threshold value and there is no change, the heat accumulation is not resolved. On the other hand, on the other hand, it is considered that the heat accumulation has been eliminated when the temperature difference becomes smaller than the threshold value, and the mode is changed from the intermediate air volume mode to the normal mode.

When the calculated temperature difference is equal to or greater than a certain value and the measured air volume acquired in each of the steps 102 and 105 is between the maximum air volume and the minimum air volume (N in step 117), the air volume control unit 12 acquires it. After temporarily holding the current status information as the information collected immediately before (step 123), the process proceeds to step 104.

As described above, according to the present embodiment, it is possible to eliminate the heat accumulation. In the present embodiment, the air conditioning controller 1 executes the air volume control processing described above for each VAV 3, but the air volume control processing program is installed in each VAV controller 4, and the air volume control described above is performed for the corresponding VAV 3. The processing may be configured to be executed by the VAV controller 4.

Further, in the present embodiment, the air volume is changed from VAV3, but the present invention can be applied to an air conditioning system without VAV3. For example, when the air conditioner system is configured to send air from the AHU 2 into the room from one outlet, the air volume from the fan 23 is controlled by controlling the operation of the inverter 7 according to the air volume control process. Good.

1 Air Conditioning Controller, 2 AHU, 3a, 3b VAV, 4a, 4b VAV Controller, 5a, 5b Remote Controller, 6a, 6b Valve, 7 Inverter, 8 Rooms, 11 Current Condition Information Collecting Section, 12 Air Volume Control Section, 13 Control Section, 21 Cold water coil, 22 hot water coil, 23 fan, 121 normal processing unit, 122 maximum air volume processing unit, 123 minimum air volume processing unit, 124 intermediate air volume processing unit.

Claims (9)

When a change in the air volume from the air conditioner that adjusts the air volume of the air to be sent to the room is not detected for the first predetermined time, the air volume control means that performs the air volume control that changes the air volume so that the air flow from the air conditioner fluctuates. An air-conditioning control device comprising: The air volume control means has a difference between the measured temperature and the set temperature of the room which is equal to or more than a certain value at the time when the first predetermined time has elapsed, and the air conditioner changes during the first predetermined time. If the air conditioner is operating at the maximum air volume without operating, the air volume from the air conditioner is reduced to the first predetermined air volume over the second predetermined time, and then increased to the maximum air volume over the third predetermined time. The air conditioning control device according to claim 1, which is controlled. The air volume control means has a difference between the measured temperature and the set temperature of the room that is less than a certain value at the time when the first predetermined time elapses, and the air conditioner changes during the first predetermined time. When operating without a minimum air volume, the air volume from the air conditioner is increased to a second predetermined air volume over a fourth predetermined time and then reduced to the minimum air volume over a fifth predetermined time. The air conditioning control device according to claim 1, which is controlled. The air volume control means has a difference between the measured temperature and the set temperature of the room which is equal to or more than a certain value at the time when the first predetermined time has elapsed, and the air conditioner changes during the first predetermined time. When operating at an air volume between the maximum air volume and the minimum air volume without controlling the air volume from the air conditioner, the air volume is controlled to increase or decrease at least one from the current air volume. The air conditioning control device according to 1. When the current air volume of the air conditioner is closer to the minimum air volume than the maximum air volume of the air conditioner, the air volume control means controls the air volume to increase and then decrease the air volume from the air conditioner. Item 5. The air conditioning control device according to item 4. The air volume control means increases the air volume from the air conditioner to a predetermined third predetermined air volume over a sixth predetermined time, and then reduces the air volume to a fourth predetermined air volume over a seventh predetermined time, and further The air conditioning control device according to claim 5, wherein the air flow rate is controlled so as to increase to the current air flow over an eighth predetermined time. When the current air volume of the air conditioner is closer to the maximum air volume than the minimum air volume of the air conditioner, the air volume control means controls the air volume to decrease and then increase the air volume from the air conditioner. Item 5. The air conditioning control device according to item 4. The air volume control means reduces the air volume from the air conditioner to a fifth predetermined air volume over a ninth predetermined time period, then increases the air volume up to a sixth predetermined air volume over a tenth predetermined time period, and further, an eleventh time period. 8. The air conditioning control device according to claim 7, wherein the air flow rate is controlled so that the air flow rate is reduced to the current air flow over a predetermined time period. Computer,
When a change in the air volume from the air conditioner that adjusts the air volume of the air to be sent to the room is not detected for the first predetermined time, the air volume control means that performs the air volume control that changes the air volume so that the air flow from the air conditioner fluctuates. Program to function as.

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