JP2014115056A - Air-conditioning control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioning control system with a configuration suitable for executing external air cooling room by room compared with a conventional system.SOLUTION: An air-conditioning control system comprises: an air supply fan 3 which takes external air into a building 1; an air supply duct 5 through which the external air is sent to each room 2 in the building 1; an external air introduction individual damper 7 which is installed in each room 2 and opens and closes the air supply duct 5; and a controller 20 which performs external air cooling control. The controller 20 sends the external air to the room 2, which satisfies an execution condition of external air cooling, by putting the external air introduction individual damper 7 installed for the room 2 in an open state.

Description

  The present invention relates to an air conditioning control system, and more particularly to a system configuration for performing outdoor air cooling.

  When air conditioning is necessary from the middle of spring to autumn and during the winter season, there is outside air cooling as a method of cooling by using outside air as a cooling source. In recent years, there are facilities that cool the outside air not only for the entire building by the central system but also for each room by the individual distributed system.

Japanese Patent No. 2762204 Japanese Patent No. 4579810 Japanese Patent Laid-Open No. 10-318593

  An object of this invention is to provide the air-conditioning control system of the structure adapted to perform outdoor air cooling per room compared with the past.

  The air conditioning control system according to the present invention corresponds to an outside air intake means for taking outside air into a building, a flow path of outside air laid from the outside air intake means to each room in the building, and each room of the flow path. An opening / closing mechanism that is disposed in the portion and that opens or closes the portion of the flow path, and the opening / closing mechanism that is disposed corresponding to a room that satisfies a preset outdoor air cooling condition. And control means for controlling the outside air taken in by the outside air taking-in means to be sent into the room by opening the door.

  Further, the control means controls the outside air intake capability of the outside air intake means according to the number of rooms into which the outside air is being sent.

  ADVANTAGE OF THE INVENTION According to this invention, the structure suitable for performing outside air cooling per room compared with the past can be provided.

  Moreover, the air volume of the outside air sent into each room can be kept constant.

It is a schematic structure figure showing one embodiment of an air-conditioning control system concerning the present invention. It is a block block diagram of the controller 20 in this Embodiment. It is the flowchart which showed the external air cooling control process in this Embodiment.

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

  FIG. 1 is a schematic configuration diagram showing an embodiment of an air conditioning control system according to the present invention. FIG. 1 shows a configuration necessary for performing outdoor air cooling in the present embodiment, and a configuration for performing normal air conditioning control on the entire building is omitted.

  The building 1 shown in FIG. 1 shows rooms 2a, 2b, and 2c that are individually air-conditioned. In addition, since the components, such as the equipment provided corresponding to each room 2a-2c, may be equivalent, the subscript "a", "b", "c" contained in a code | symbol is used for description common to each. "Is omitted as appropriate, and only numbers are used.

  The building 1 is provided with an air supply fan 3 and an air supply damper 4 for cooling the outside air as outside air intake means for taking outside air into the building 1. The outside air intake means may be constituted by only the air supply fan 3. The air supply duct 5 for cooling the outside air forms a flow path of the outside air laid from the outside air intake means to each room 2 in the building 1. In detail, the air supply duct 5 allows the outside air taken in from the ceiling air supply port 9 to the inside of the building 1 via the external air introduction individual damper 7 and the individual air conditioning unit 8 installed in the ceiling 6 of each room 2. The route to be sent to each room 2 is formed. The outside air introduction individual damper 7 is provided as an opening / closing mechanism, and makes the portion corresponding to each room 2 of the air supply duct 5 open or closed. In the present embodiment, the portion corresponding to each room 2 is a portion disposed on the ceiling 6 of the air supply duct 5. The individual air conditioning unit 8 performs air conditioning of the corresponding room according to an instruction from a controller (not shown). A remote controller 10 installed in the room is connected to the individual air conditioning unit 8. The remote controller 10 is used for displaying the room temperature and the set temperature measured by a temperature sensor (not shown), setting the operation mode by a room occupant, switching the thermostat on and off, and the like.

  Further, the building 1 is provided with an exhaust fan 11 and an exhaust damper 12 for cooling the outside air as exhaust means for exhausting the air inside the building 1 to the outside. The exhaust means may be constituted only by the exhaust fan 11. The outside air cooling exhaust duct 13 forms a flow path for discharging the air behind the ceiling 6 of each room 2 to the outside through the exhaust means. In FIG. 1, the air supply duct 5 is indicated by a relatively thick solid line, and the exhaust duct 13 is indicated by a relatively thin solid line for easy identification. The air inside the room 2 flows into the ceiling back 6 via the return air opening 14 provided on the ceiling of each room 2. The air behind the ceiling 6 is exhausted to the outside through the exhaust duct 13 or is sucked into the individual air conditioning suction chamber 15 and sent into the room again. The static pressure sensor 31 measures the static pressure in the air supply duct 5.

  And the controller 20 is an air-conditioning control apparatus for controlling outside air cooling. The controller 20 in the present embodiment is provided as a control means, and opens the outside air introduction individual damper 7 provided corresponding to the room 2 that satisfies a preset outside air cooling implementation condition. The outside air taken in by the air supply fan 3 is controlled to be sent into the room 2. The controller 20 is connected to each of the dampers 4, 7, 12 by a control signal line 16 indicated by a short broken line in order to control the opening / closing operation of the dampers 4, 7, 12. Further, the controller 20 is connected to each of the fans 3 and 11 through a control signal line 17 indicated by a two-dot chain line in order to perform drive control of the fans 3 and 11. Further, the controller 20 is connected to each individual air conditioning unit 8 by a data signal line 18 indicated by a one-dot chain line in order to acquire the setting contents from the individual air conditioning unit 8 to the individual air conditioning unit 8, and the static pressure sensor 31. In order to obtain the static pressure from the data signal line 19, the data signal line 19 indicated by the long broken line is connected to the static pressure sensor 31.

  FIG. 2 is a block configuration diagram of the controller 20 in the present embodiment. The controller 20 is an air conditioning control device for controlling outside air cooling, and a conventional device may be used as it is as a hardware configuration. That is, the controller 20 has a CPU, ROM, RAM, hard disk drive (HDD), a network interface that communicates with other controllers included in the air conditioning system, a communication interface that communicates with each individual air conditioning unit 8, and the like. Yes. Moreover, you may connect input means, such as a mouse | mouth and a keyboard, and display means, such as a display, as needed.

  The controller 20 in the present embodiment includes an air supply fan control unit 21, an exhaust fan control unit 22, an air supply damper control unit 23, an exhaust damper control unit 24, an individual damper control unit 25, a unit information acquisition unit 26, and an outside air cooling state. An information acquisition unit 27, a static pressure acquisition unit 28, and a control unit 29 are included. The air supply fan control unit 21 and the exhaust fan control unit 22 control operations of the air supply fan 3 and the exhaust fan 11, respectively. The air supply damper control unit 23 and the exhaust damper control unit 24 control the operations of the air supply damper 4 and the exhaust damper 12, respectively. The individual damper control unit 25 controls the operation of the outside air introduction individual damper 7 installed corresponding to each room 2. The unit information acquisition unit 26 acquires unit information sent from the individual air conditioning unit 8 installed corresponding to each room 2. The outside air cooling state information acquisition unit 27 acquires outside air cooling state information sent from another controller (not shown) included in the air conditioning system. In the outdoor air cooling state information, the other controller determines whether the outdoor air cooling is currently effective by comparing the temperature and humidity of the outdoor air with the room temperature and humidity of each room 2. The state information acquisition unit 27 acquires the determined result as outside air cooling state information. It should be noted that the controller 20 may acquire information such as temperature and humidity necessary for determining validity or invalidity. The static pressure acquisition unit 28 acquires the static pressure measured by the static pressure sensor 31. The control unit 29 operates in cooperation with the components 21 to 28 included in the controller 20 and controls the entire processing in the controller 20.

  Each component 21-29 in the controller 20 is implement | achieved by cooperation operation | movement of the computer which forms the controller 20, and the program which operate | moves with CPU mounted in the computer.

  Further, the program used in this embodiment can be provided not only by communication means but also by storing it in a computer-readable recording medium such as a CD-ROM or DVD-ROM. The program provided from the communication means or the recording medium is installed in the computer, and various processes are realized by the CPU of the computer sequentially executing the program.

  Next, outside air cooling control processing performed by the controller 20 in the present embodiment will be described with reference to the flowchart shown in FIG. When activated, the controller 20 always executes an outside air cooling control process described later without ending. Although not included in FIG. 3, steps 101 to 107 may be periodically repeated, for example, at a 1 minute period.

  First, the outside air cooling is not performed in all the rooms 2 at present. In this state, each of the fan control units 21 and 22 stops the operation by turning off the air supply fan 3 and the exhaust fan 11, respectively. The damper control units 23 to 25 close the corresponding intake air supply damper 4, exhaust exhaust damper 12, and outdoor air introduction individual damper 7 installed corresponding to each room 2. To. When the individual air conditioning unit 8 is in an operating state, air conditioning is performed according to the set operation mode.

  In this state, if the outside air cooling state information acquisition unit 27 acquires the outside air cooling state information sent from another controller, is it effective for the control unit 29 to perform the outside air cooling with reference to the outside air cooling state information? Judge whether. If the outside air cooling is not effective (N in step 101), the room 2a is continuously brought into a state where the outside air cooling is stopped (step 106). Specifically, each of the fan control units 21 and 22 stops the operation by turning off the air supply fan 3 and the exhaust fan 11, respectively. If already stopped, the stopped state is maintained. The damper control units 23 to 25 close the corresponding supply-side air supply damper 4, exhaust-side exhaust damper 12, and all outside air introduction individual dampers 7. If already closed, the closed state is maintained.

  On the other hand, when the outside air cooling is effective (Y in Step 101), each of the fan control units 21 and 22 starts the operation by turning on the supply fan 3 and the exhaust fan 11, respectively. Further, each damper control unit 23, 24 opens the supply damper 4 and the exhaust damper 12 respectively (step 102).

  Then, the unit information acquisition part 26 acquires the operation mode currently set to the said individual air conditioning unit 8 from each individual air conditioning unit 8, and confirms whether the operation mode is set to air_conditioning | cooling. If the operation mode in the individual air conditioning unit 8 is not currently cooling (N in step 103), the individual damper control unit 25 closes the room air introduction individual damper 7 corresponding to the individual air conditioning unit 8 to thereby close the room. 2 stops the supply of outside air. That is, the operation in the outside air cooling of the room 2 is stopped (step 107). When the outside air introduction individual damper 7 is already closed, the closed state is maintained.

  When the operation mode in the individual air conditioning unit 8 is cooling (Y in step 103), the control unit 29 subsequently acquires the on / off state of the thermostat currently set in the individual air conditioning unit 8 from each individual air conditioning unit 8. To do. When the thermostat is OFF (N in Step 104), the individual damper control unit 25 closes the external air introduction individual damper 7 corresponding to the individual air conditioning unit 8 as in the case where the operation mode in the individual air conditioning unit 8 is not cooling. By setting the state, the operation in the outside air cooling of the room 2 is stopped (step 107).

  On the other hand, when the thermostat is on (Y in Step 104), the individual damper control unit 25 supplies the outside air to the room 2 by opening the outside air introducing individual damper 7 corresponding to the individual air conditioning unit 8. . That is, the outside air cooling operation is started for the room 2 (step 105). When the outside air introduction individual damper 7 is already in an open state, the open state is maintained.

  In the present embodiment, the operation of the outside air cooling is controlled for each room by repeating the above processing.

  As described above, in the present embodiment, as shown in steps 101, 103, and 104, the outdoor air cooling execution conditions are set in advance, and only the room 2 that satisfies all the conditions is subjected to the outdoor air cooling. I tried to drive. Among these implementation conditions, the condition that the outside air cooling in step 101 is effective is the implementation condition for all the rooms 2, and the setting of the operation mode in step 103 and the operation state of the thermostat in step 104 are for each room 2. This is an implementation condition for determining whether or not the above is satisfied. In the present embodiment, the above three implementation conditions are set, but other conditions may be set instead of or in addition to these implementation conditions.

  If the amount of outside air taken into the building 1 is constant, the amount of outside air sent into each room 2 varies depending on the number of rooms where outside air cooling is performed. That is, since the amount of outside air is constant, when the number of the rooms 2 into which the outside air introduction individual damper 7 is opened and the outside air is sent increases, the static pressure is lowered, and the amount of the outside air sent into each room 2 is reduced. Thereby, the cooling effect by the outside air cooling in each room 2 will be reduced.

  Therefore, in the present embodiment, the outside air intake capability is controlled according to the number of rooms into which the outside air is being sent. For example, the static pressure in the air supply duct 5 when only one room 2 is performing external air cooling is acquired from the static pressure sensor 31, and the control unit 29 is supplied by the static pressure acquisition unit 28. The air supply fan 3 is driven and controlled so that the static pressure in the air duct 5 becomes a value equivalent to the acquired static pressure. Specifically, assuming that the static pressure CP in the air supply duct 5 when only one room 2 is performing the outside air cooling, the current static pressure is obtained because any one of the rooms 2 starts the operation of the outside air cooling. When the air pressure is lower than the static pressure CP, the control unit 29 detecting this performs inverter control on the air supply fan 3 and increases the rotation speed of the air supply fan 3. On the contrary, if any of the rooms 2 has stopped the operation of the outside air cooling and the current static pressure exceeds the static pressure CP, the control unit 29 that has detected this causes inverter control for the air supply fan 3. To reduce the rotation speed of the air supply fan 3. In this way, the air volume of the outside air sent into each room 2 can be kept constant. The inverter control for the exhaust fan 11 may be performed in cooperation with the inverter control for the air supply fan 3.

  In the above example, the static pressure in the air supply duct 5 is kept constant by the drive control for the air supply fan 3, but not limited to this, other methods may be used. For example, the air supply fan 3 may be inverter-controlled so that the number of rotations according to the number of open-air introduction individual dampers 7 in the open state, that is, the number of rooms 2 in which the outside air cooling is performed. In other words, when the number of open-air introduction individual dampers 7 in the open state increases by one, the rotation speed of the air supply fan 3 is increased by a predetermined rate. Alternatively, a plurality of air supply fans 3 may be installed, and the number of air supply fans 3 to be operated may be determined according to the number of rooms 2 that are performing outdoor air cooling. Further, not only drive control for the air supply fan 3 but also opening adjustment of the air supply damper 4 may be combined.

  In the present embodiment, as shown in FIG. 1, a configuration in which outside air is sent into each room 2 in correspondence with each room 2 is provided separately from the configuration in which outside air is taken into the building 1. Specifically, an external air introduction individual damper 7 is installed in correspondence with each room 2, and each outside air introduction individual damper 7 is connected to an air supply duct 5 serving as a flow path of the external air taken in by the air supply fan 3. It was. As a result, when it is desired to increase the number of the rooms 2 where the outside air cooling is desired, the outside air introduction individual damper 7 is installed corresponding to the room 2, the supply duct 5 and the exhaust duct 13 are extended to the room 2, and the supply duct The outside air introduction individual damper 7 may be attached to 5. In this embodiment, the outside air cooling can be performed individually for each room as described above, and expansion of the outside air cooling for each room can be easily and flexibly handled.

  1 Building, 2a, 2b, 2c Room, 3 Air supply fan, 4 Air supply damper, 5 Air supply duct, 6a, 6b, 6c Ceiling, 7a, 7b, 7c Outside air introduction individual damper, 8a, 8b, 8c Individual air conditioning Unit, 9a, 9b, 9c Air supply port, 10a, 10b, 10c Remote control, 11 Exhaust fan, 12 Exhaust damper, 13 Exhaust duct, 14a, 14b, 14c Return air port, 15 Individual air conditioning suction chamber, 16, 17 Control signal 18, 19 data signal lines, 20 controller, 21 supply fan control unit, 22 exhaust fan control unit, 23 supply air damper control unit, 24 exhaust damper control unit, 25 individual damper control unit, 26 unit information acquisition unit, 27 outdoor air cooling state information acquisition unit, 28 static pressure acquisition unit, 29 control unit, 31 static pressure sensor.

Claims (2)

Outside air intake means for taking outside air into the building,
A flow path of outside air laid from the outside air intake means to each room in the building;
An opening / closing mechanism disposed in a portion corresponding to each of the chambers of the flow path, and opening or closing the portion of the flow path;
Control is performed so that the outside air taken in by the outside air intake means is sent to the room by opening the opening / closing mechanism arranged corresponding to the room that satisfies the preset conditions for the outside air cooling. Control means to
An air conditioning control system comprising:   The air conditioning control system according to claim 1, wherein the control unit controls an outside air intake capability of the outside air intake unit according to the number of rooms into which the outside air is being sent.

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