JP4575282B2 - Air conditioning control system - Google Patents

Description

  The present invention relates to an air conditioning control system that supplies conditioned air from an air conditioner as supply air to a control target room according to an air conditioning control schedule.

  Conventionally, in this type of air conditioning control system, the supply start time of supply air to the control target room is determined as the schedule start time from the air conditioning control schedule determined according to the day of the week, and the supply stop time of the supply air is scheduled. The stop time is determined.

  For example, a VAV device (variable air volume device) is installed on the ceiling of the room to be controlled, and conditioned air is sent to the VAV device through a duct from the air conditioner. The damper opening degree of the VAV device is controlled based on the room temperature (room temperature), and conditioned air from the air conditioner is supplied to the controlled room as supply air.

  Since the air conditioner is controlled to send out the total amount of conditioned air required by each VAV device, the smaller the number of VAV devices in operation, and the smaller the supply of air to each VAV device, the less conditioned air The delivery amount is small, and the air conditioner operates at low speed, saving energy.

  In some cases, an optimum start / stop control function for the purpose of saving energy is added to such an air conditioning control system. The optimal start / stop control function consists of an optimal start function that shortens the preheating operation time before the start of use of the controlled room as much as possible, and an optimal stop function that extends the remaining heat utilization time before the end of use of the controlled room as much as possible. (For example, refer nonpatent literature 1).

In the optimal startup function, the time of advance is set as the optimal startup time so that the temperature of the room to be controlled is located at the boundary of the appropriate temperature range (allowable range) at the schedule startup time, and the operation of the VAV device is advanced from this optimal startup time To start.
In the optimum stop function, the time of advance ahead such that the temperature of the controlled room is located at the boundary of the optimum temperature range at the schedule stop time is determined as the optimum stop time, and the operation of the VAV device is stopped ahead of time at the optimum start / stop time. .

When the operation of the VAV device is stopped, the supply air amount from the VAV device to the control target room becomes 0 or the stop-time air amount.
Note that “the air volume at the time of stop” is for releasing the air sent out by the air supply fan of the air conditioner during the lowest speed operation, and thus the air quality in the control target room cannot always be maintained with this air volume.

  FIG. 6 shows, as an example, a time chart of a control situation according to the optimum start / stop control function during heating operation. FIG. 6A shows the change in the temperature (room temperature) in the control target room, and FIG. 6B shows the operating state of the VAV device. In FIG. 6A, tsp is the target temperature determined for the indoor temperature tpv, tup is the upper limit value (upper limit value of the appropriate temperature range) determined for the target temperature tsp, and tdw is the target temperature tsp. It is a defined lower limit (lower limit of the appropriate temperature range). T1 is the optimum start time, T2 is the schedule start time, T3 is the optimum stop time, and T4 is the schedule stop time.

  In FIG. 6, when the current time reaches the optimum activation time T1, the operation of the VAV device is started. As a result, the damper of the VAV device is opened, conditioned air from the air conditioner is supplied as supply air to the controlled room, and the room temperature tpv begins to rise.

When the current time reaches the schedule activation time T2, the operation of the VAV device is started ahead of time at the optimum activation time T1, so that the room temperature tpv of the control target room is almost the lower limit value tdw of the appropriate temperature range. .
Thereafter, until the current time reaches the optimum stop time T3, the damper opening degree of the VAV device is controlled such that the room temperature tpv becomes the target temperature tsp.

When the current time reaches the optimum stop time T3, the operation of the VAV device is stopped. As a result, the damper of the VAV device is closed, the supply air amount to the control target chamber is set to 0 or the stop-time air amount, and the room temperature tpv starts to decrease.
When the current time reaches the schedule stop time t4, the room temperature tpv becomes the lower limit value tdw of the optimum temperature range because the operation of the VAV device is stopped ahead of time at the optimum stop time T3.

“Ministry of Education, Culture, Sports, Science and Technology, Ministry of Health, Labor and Welfare, Ministry of Economy, Trade and Industry, Ministry of Land, Infrastructure, Transport and Tourism Notification No. 1 (4 pages)” (February 26, 2004)

  According to the control according to the optimum start / stop control function described above, the supply air amount into the control target room is set to 0 or the stop time air amount until the current time reaches the optimum start time T1, and the current time reaches the optimum start time T1. After that, the air volume becomes equal to or greater than the minimum air volume (minimum ventilation air volume) necessary for maintaining the air quality in the controlled room, and is 0 or the air volume at the time of stop after the current time reaches the optimum stop time T3.

  In this case, basically, the room to be controlled is unmanned until the current time reaches the schedule start time T2, and after the current time reaches the schedule start time T2, it is manned until the schedule stop time T4 is reached. After the current time reaches the schedule stop time T4, it becomes unattended. Therefore, during the period from the optimal stop time T3 to the schedule stop time T4, the supply air volume into the control target room is set to 0 or the stop time air volume even though the control target room is manned. There is a risk that quality cannot be maintained.

  For this reason, conventionally, the user changes the parameter setting so that the optimum stop function of the optimum start / stop control function does not work, and even after reaching the optimum stop time T3, the supply air volume in the control target room is reduced to the minimum ventilation. In many cases, the air volume was higher than the air volume (see FIG. 7), and the use of the optimal stop function was low.

  The present invention has been made to solve such problems, and an object of the present invention is to provide an air conditioning control system capable of promoting energy saving while maintaining indoor temperature and air quality. It is in.

  In order to achieve such an object, the present invention provides an air conditioning control system that supplies conditioned air from an air conditioner as supply air to a control target room according to an air conditioning control schedule. The schedule stop time determining means for determining the supply stop time as the schedule stop time, and the temperature in the control target room when the supply of air to the control target room is stopped ahead of schedule is located at the boundary of the allowable range at the schedule stop time The optimum stop time determination means for determining the advance stop time as the optimum stop time, and when the current time reaches the optimal stop time, the supply of air to the controlled room is continued until the current time reaches the schedule stop time. And a means for setting the air volume to a minimum air volume necessary for maintaining the air quality of the control target room.

  According to the present invention, when the current time reaches the optimal stop time, the air volume of the supply air to the control target room is required to maintain the air quality in the control target room until the scheduled stop time is reached. The minimum air volume (minimum ventilation air volume).

  According to the present invention, when the current time reaches the optimal stop time, the supply air volume to the control target room is set to the minimum ventilation air volume until the scheduled stop time is reached. It is possible to maintain the temperature and air quality of the room to be controlled until the time. Therefore, it is possible to improve the use record of the optimum stop function and promote energy saving.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an outline of an embodiment of an air conditioning control system according to the present invention. In the figure, 1 is an air conditioner, 2-1 to 2-n are VAV devices, 3-1 to 3-n are control target rooms, and 4 is a duct.

  In this air conditioning control system, the conditioned air from the air conditioner 1 is sent to the VAV devices 2-1 to 2-n via the duct 4, and the control target rooms 3-1 to 3-n are transmitted from the VAV devices 2-1 to 2-n. -N is supplied as supply air. The supply air supplied to the control target chambers 3-1 to 3-n is discharged as exhaust gas after contributing to the air conditioning control of the control target chambers 3-1 to 3-n. A part of the exhaust is taken into the air conditioner 1 as return air, and the rest is returned to the outside air.

  In this air conditioning control system, an air conditioner controller 5 is provided for the air conditioner 1, and VAV controllers 6-1 to 6-n are provided for the VAV devices 2-1 to 2-n. The air conditioner controller 5, the VAV controllers 6-1 to 6-n, and the central monitoring device 7 are connected to each other via a communication line L.

  FIG. 2 shows an outline of a hardware configuration example of the central monitoring device 7. In the figure, 7-1 is a CPU, 7-2 is a RAM, 7-3 is a ROM, 7-4 is a storage device such as a hard disk, 7-5 to 7-7 are interfaces, 7-8 is a display, 7- 9 is a keyboard, and 7-10 is a mouse.

  The CPU 7-1 operates in accordance with a program stored in the ROM 7-3 or the storage device 7-4 while accessing the RAM 7-2. The storage device 7-4 stores an optimum start / stop control program as a program unique to the present embodiment. The optimum start / stop control program is provided in a state of being recorded on a recording medium such as a CD-ROM, for example, and is read from the recording medium and installed in the storage device 7-4.

  FIG. 3 shows an outline of a hardware configuration example of the VAV controller 6. In the figure, 6A is a CPU, 6B is a RAM, 6C is a ROM, and 6D to 6F are interfaces. The CPU 6A operates in accordance with a program stored in the ROM 6C while accessing the RAM 6B. The ROM 6C stores a VAV control program as a program unique to the present embodiment. The target temperature tsp may be given from the interface 6F or may be given from the central monitoring device 7 or the like via the communication line L.

  Hereinafter, characteristic operations in the air conditioning control system will be described with reference to a time chart shown in FIG. 4 is a time chart showing a control state according to the optimum start / stop control function during the heating operation corresponding to FIG. 6, and FIG. 4 (a) shows a change in the temperature (room temperature) in the controlled room 3. FIG. 4B shows the operating state of the VAV device 2. Further, the processing operation in the central monitoring apparatus 7 shown below is executed in accordance with the above-described optimum start / stop control program, and the processing operation in the VAV controller 6 is executed in accordance with the above-described VAV control program.

  The CPU 7-1 of the central monitoring device 7 determines the supply start time of the supply air to the controlled room 3 as the schedule start time T2 from the air conditioning schedule determined according to the day of the week, etc., and schedules the supply stop time of the supply air The stop time T4 is determined. Further, the optimum start time T1 at which the room temperature tpv of the controlled room 3 becomes tpv = tdw at the schedule start time T2, and the room temperature tpv of the controlled room 3 becomes tpv = tdw at the schedule stop time T4. The optimum stop time T3 is obtained.

  When the current time reaches the optimum activation time T1, the CPU 7-1 of the central monitoring device 7 sends an optimum activation instruction to the VAV controller 6 via the communication line L. The VAV controller 6 starts the operation of the VAV device 2 when receiving an optimum activation command from the central monitoring device 7. Thereby, the damper of the VAV device 2 is opened, the conditioned air from the air conditioner 1 is supplied to the controlled room 3 as supply air, and the room temperature tpv starts to rise. The air conditioner controller 5 adjusts the speed of the air supply fan 1-1 by determining whether the amount of conditioned air delivered is excessive or insufficient based on the information obtained from the VAV controller 6, the measured value of the pressure in the duct, and the like.

  When the current time reaches the schedule activation time T2, the operation of the VAV device 2 is started ahead of the optimum activation time T1, so that the room temperature tpv of the control target room 3 is almost an appropriate temperature range (allowable range). Is the lower limit tdw.

  Thereafter, until the current time reaches the optimum stop time T3, the VAV controller 6 determines the room temperature tpv and the target temperature tsp of the control target room 3 from the measured wind speed from the VAV device 2 and the characteristic value of the VAV device 2. A matching air supply amount is obtained, an opening degree instruction for obtaining this air supply amount is given to the VAV device 2, and the damper opening degree of the VAV device 2 is controlled.

When the current time reaches the optimum stop time T3, the CPU 7-1 of the central monitoring device 7 sends an optimum stop command to the VAV controller 6 via the communication line L.
When receiving the optimum stop command from the central monitoring device 7, the VAV controller 6 sets the damper opening of the VAV device 2 so that the amount of air supplied from the VAV device 2 to the controlled room 3 becomes the minimum ventilation air volume. Adjust. Thereby, the indoor temperature tpv starts to decrease while maintaining the air quality of the control target chamber 3.
The air conditioner controller 5 recognizes a decrease in the required delivery amount of conditioned air from the information obtained from the VAV controller 6, the measured value of the pressure in the duct 4, and the like, and reduces the speed of the air supply fan 1-1.

  When the current time reaches the schedule stop time T4, the CPU 7-1 of the central monitoring device 7 sends a schedule stop command to the VAV controller 6 via the communication line L. At the schedule stop time t4, the air supply from the VAV device is set to the minimum ventilation air volume at the optimal stop time T3, so that the room temperature tpv becomes the lower limit value tdw of the optimum temperature range.

When receiving the schedule stop command from the central monitoring device 7, the VAV controller 6 closes the damper opening of the VAV device 2, and sets the supply air amount to the control target chamber 3 to 0 or the stop-time air amount.
The air conditioner controller 5 recognizes a decrease in the required delivery amount of conditioned air from the information obtained from the VAV controller 6, the measured value of the pressure in the duct 4, and the like, and further reduces the speed of the air supply fan 1-1.

  As can be seen from the control state of FIG. 4, in the present embodiment, the air supply amount to the control target chamber 3 is 0 or the stop-time air amount until the current time reaches the optimum start time T1, and the current time is After reaching the optimum activation time T1, the air volume is equal to or greater than the minimum ventilation air volume. When the current stop time reaches the optimum stop time T3, the minimum ventilation air volume is reached until the schedule stop time T4 is reached. After the current time reaches the schedule stop time T4, it is set to 0 or the stop air volume.

  As described above, in the present embodiment, when the current time reaches the optimum stop time T3, the amount of air supplied to the control target room 3 is the minimum ventilation air amount until the current time reaches the schedule stop time T4. Therefore, it is possible to maintain the temperature and air quality of the room to be controlled 3 from the optimum start / stop time T3 to the scheduled stop time T4, increase the use record of the optimum stop function, and promote energy saving. It becomes possible.

  In the above-described embodiment, an optimal stop command is sent from the central monitoring device 7 to the VAV controller 6, and the damper opening for obtaining the minimum ventilation air volume is obtained in the VAV controller 6, but as shown in FIG. Is provided with a zone controller 8 that supervises the VAV controller 6, an optimum stop command is sent from the central monitoring device 7 to the zone controller 8, the damper opening for obtaining the minimum ventilation air volume is obtained in the zone controller 8, and the obtained damper opening The degree may be sent to the VAV controller 6.

  In the above-described embodiment, the optimum start / stop control program is installed in the central monitoring device 7. However, it may be installed in the air conditioner controller 5 or the zone controller 8, as shown in FIGS. You may make it mount in the other control apparatus which is not. Furthermore, the optimum start / stop control program and the air conditioning control schedule may be subdivided into functions constituting them, and distributed and installed in these control devices and the VAV controller 6 to operate in cooperation with each other. Conversely, all the control functions including the VAV control program may be centrally mounted on the central monitoring device 7 or the like.

  The optimum start / stop control program and the air conditioning control schedule may be provided corresponding to individual VAV controllers 6 or may be provided corresponding to a plurality of grouped VAV controllers 6.

  In the above-described embodiment, the control target chambers 3-1 to 3-n are independent spaces, but may be continuous spaces.

  In the above-described embodiment, the conditioned air from the air conditioner has been described as an application example to an air conditioning control system (VAV system) that supplies conditioned air as supply air to a controlled room via a VAV device. However, it goes without saying that it can be applied in the same manner.

It is a figure showing the outline of one embodiment of the air-conditioning control system concerning the present invention. It is a figure which shows the outline of the hardware constitutions of the central monitoring apparatus in this air-conditioning control system. It is a figure which shows the outline of the hardware constitutions of the VAV controller in this air-conditioning control system. It is a time chart which shows the control condition according to the optimal starting stop control function at the time of heating operation in this air-conditioning control system. It is a figure which shows the outline of other embodiment of the air-conditioning control system which concerns on this invention. It is a time chart which shows the control condition according to the optimal starting stop control function at the time of the conventional heating operation. It is a time chart which shows the control condition according to the optimal starting stop control function at the time of heating operation at the time of not making an optimal stop function work.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 1-1 ... Air supply fan, 2 (2-1 to 2-n) ... VAV apparatus, 3 (3-1 to 3-n) ... Control object room, 4 ... Duct, 5 ... Air conditioner Controller, 6 (6-1 to 6-n) ... VAV controller, 6A ... CPU, 6B ... RAM, 6C ... ROM, 6D-6F ... Interface, 7 ... Central monitoring device, 7-1 ... CPU, 7-2 ... RAM, 7-3 ... ROM, 7-4 ... Storage device, 7-5 to 7-7 ... Interface, 7-8 ... Display, 7-9 ... Keyboard, 7-10 ... Mouse, 8 ... Zone controller, L ... Communication line, T1 ... optimum start time, T2 ... schedule start time, T3 ... optimal stop time, T4 ... schedule stop time.

Claims (1)

In an air conditioning control system that supplies conditioned air from an air conditioner as supply air to a controlled room according to an air conditioning control schedule,
A schedule stop time determining means for determining a supply stop time of supply air to the control target room from the air conditioning control schedule as a schedule stop time;
Optimum stop for determining the forward stop time at which the temperature in the control target room is located at the boundary of the allowable range at the scheduled stop time as the optimal stop time when the supply of air supply to the control target room is stopped ahead of time Time determination means;
When the current time reaches the optimum stop time, the air quality of the control target room is maintained in a predetermined amount of air supplied to the control target room until the current time reaches the schedule stop time. An air conditioning control system characterized by comprising:

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