JP2916845B2 - Air-conditioner operation number interlocking control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the number of operating air conditioners suitable for saving energy in various facilities such as high-rise buildings, apartment houses, and hospitals.

[0002]

2. Description of the Related Art Conventionally, in various facilities such as high-rise buildings, apartment buildings, hospitals, etc., as shown in FIG.
A large number of U (AHU1 to AHUn) are arranged, and cold and hot water CW is sent to these air conditioners AHU via a cold and hot water pump P. In this case, when at least one air conditioner AHU is operated, the cold / hot water pump P starts in conjunction with the operation. Further, the cold / hot water pump P is stopped in conjunction with the stoppage of all operations of the air conditioner AHU.

[0003]

However, in this case, if the number of operating air conditioners AHU decreases, for example, in the evening, cooling and heating can be performed using the cold and hot water CW remaining in the piping. However, since the cold / hot water pump P is operated, power is consumed excessively.

[0004] The present invention has been made to solve such a problem, and an object of the present invention is to provide a method of controlling the number of operating air conditioners that can save energy in various facilities.

[0005]

To SUMMARY OF THE INVENTION To achieve the above object, the present invention is, after having determined the control start time and the control end time, the control execution time zone in the control start time to control the end time In addition , an air conditioner cab that controls the operation of required power devices according to the current number of operating air conditioners.
In the number-linked control method, the lower limit value k
(K ≧ 1), and the current number of air conditioners
All required power when the number of operating machines is below the lower limit value k
The operation of the device is stopped .

[0006]

Therefore, according to the present invention, if the current number of operating air conditioners becomes equal to or less than the lower limit value k in the control execution time zone, all the power devices are stopped . That is, the current state of air conditioners
When the number of currently operating vehicles becomes equal to or lower than the lower limit value k, k air conditioners are activated.
Despite being driven, all power equipment (e.g.
For example, the cold / hot water pump) stops .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments.

FIG. 2 is a block diagram showing a main part of an embodiment of an air conditioner operating number interlocking control system to which the present invention is applied. In the figure, 1 is a CPU, 2 is a hard disk, 3 is a CRT, 4 is a printer, SCU is a distributed controller, M10 is a remote controller, and ELV (ELV1
-ELVn) is an elevator.

[0009] CPU1 is chilled water pump P which is input through the distributed control unit SCU, air conditioner AHU, elevators E
Various status signals from the LV are obtained, and various processing operations are performed according to a program stored in the hard disk 2.
The CPU 1 sends control commands issued in accordance with various processing operations to the chilled water pump P and the air conditioner AH via the decentralized control unit SCU.
U, while providing the elevators ELV, and displays on the screen of CRT3 optionally the current control status. From the CRT 3, various parameters can be set for programs stored in the hard disk 2.

FIG. 3 is an example of a device interlocking control screen displayed on the CRT 3. On this screen, various parameters are set as follows, for example. First, "06:00" is set as the control start time, and "NOP (no operation)" is set as the output command at that time. Next, “22:00” is set as the control end time, and “OFF (stop)” is set as the output command at that time. Further, "3" is set as the upper limit number of target devices (air conditioners), and "ON (start)" is set as an output command when the target device exceeds the upper limit number. Also, the lower limit number of target devices (air conditioners) (lower limit value k)
Is set to “2”, and “OFF (stop)” is set as an output command when the number of target devices falls below the lower limit. Then, the chilled water pump P is set as an interlocking point (interlocking device).

FIG. 4 is an example of a device interlocking control registration screen displayed on the CRT 3. On this screen, the point address of the air conditioner AHU, which is the target device, is set. That is, the air conditioner AHU to be counted as the number of operating units is registered.

Note that, on the device interlocking control screen shown in FIG. 3, the current number of operating target devices and the command currently being output are displayed in the screen area 3-1 as the current control status. In addition, the current operation status of the interlocking point (“O
N "," OFF ") are displayed in the screen area indicating the point name. Further, on the device interlocking control registration screen shown in FIG. 4, the current operation status (“ON”, “OFF”) of the registered target device is displayed as a current control status in a screen area indicating the point name. Is displayed.

Next, assuming that various parameters are set as shown in FIG. 3 and FIG.
The processing operation in U1 will be described.

The CPU 1 executes a processing operation according to a flowchart shown in FIG. 5 at regular intervals. That is, it is checked whether or not the current time is in the control execution time period from the control start time (06:00) to the control end time (22:00) (step 501), and the current time is set in the control execution time period. If yes, go to step 502. In step 502, it is confirmed whether or not the current time is the control start time. If the current time is the control start time, that is, "06:00", the process proceeds to step 503, and "NOP" is output as the setting output command (start time command) at that time.

Then, the CPU 1 checks the current number of operating air conditioners AHU registered on the device interlocking control registration screen (step 504). Now, as shown in FIG. 1, it is assumed that the current number of operating air conditioners AHU is 0 at the control start time t1. In this case, CPU1
Proceeds to step 507, and returns N in the "control end time?"
The periodic processing is terminated according to O.

In the same manner, the CPU 1 repeats the periodic processing and, in step 504, confirms that the current number of operating air conditioners AHU is equal to or more than the upper limit number n2 (three) of the target devices. To “ON” as the setting output command (maximum value command) at that time
Is output. Thereby, the cold / hot water pump P is started (time t2 shown in FIG. 1B).

That is, according to the present embodiment, the cold / hot water pump P is not operated from the control start time t1 to the time t2 at which the current number of operating air conditioners AHU is confirmed to be n2 or more. Power consumption is reduced.
Since the time from time t1 to time t2 is early in the morning, cooling can be performed with the water remaining in the pipe, and there is no problem even if the cold / hot water pump P is not operated.

In the evening, when it is confirmed that the current number of operating air conditioners AHU is equal to or less than the lower limit number n1 of the target devices, the CPU 1 proceeds to step 505, where a set output command (minimum value command) is issued. Is output as "OFF". Thereby, the cold / hot water pump P is stopped (time t3 shown in FIG. 1B).

When the control end time t4 is reached, the process proceeds to step 508 in response to YES in step 507, and
As the setting output command (end command) at that time, "O
FF ”is output. In this case, since the cold / hot water pump P is already in a stopped state, its operating state does not change.

That is, according to this embodiment, the air conditioner AH
Time t at which the current operating number of U is confirmed as n1 or less
From time 3 to the control end time t4, the cold / hot water pump P is not operated, and the power consumption is reduced accordingly.
From the time t3 to the time t4, cooling and heating can be performed by the cold and hot water CW left in the pipe, and there is no problem even if the cold and hot water pump P is not operated.

In the above description, if the number of operating air conditioners AHU is not reduced to n1 or less by the time the control end time t4 is reached, the operation of the chilled / hot water pump P is controlled by the end command output at the time t4. It is forcibly stopped.

FIG. 6 is a flowchart showing the processing status of the CPU 1 when the elevator ELV is used as an interlocking device.

In this case, various parameters are set on the device interlocking control screen displayed on the CRT 3 in the same manner as when the cold / hot water pump P is used as an interlocking device. For example, “17:00” is set as the control start time, and “NOP” is set as the output command at that time. Also, “23:00” is set as the control end time, and “OFF (recall operation stop)” is set as the output command at that time. Further, “99” is set as the maximum number of target devices, and “NOP” is set as an output command when the number of target devices exceeds the maximum number. Also,
Set “5” as the lower limit number of target devices, and set “ON” as the output command when the target device falls below the lower limit number.
(Recall operation) ”. Then, for example, the elevator ELV1 is set as the interlocking point.

The CPU 1 executes a processing operation according to a flowchart shown in FIG. 6 at regular intervals. That is, it is confirmed whether or not the current time is in the control execution time zone from the control start time (17:00) to the control end time (23:00) (step 601), and the current time is set in the control execution time zone. If so, go to step 602. In step 602, it is confirmed whether or not the current time is the control start time. If the current time is the control start time, that is, “17:00”, the process proceeds to step 603, and “NOP” is output as the output command (start time command) at that time.

Then, the CPU 1 checks the current number of operating air conditioners AHU registered on the device interlocking control registration screen (step 604). Now, as shown in FIG. 7, it is assumed that the current number of operating air conditioners AHU at the control start time t1 'is, for example, six. In this case, CP
U1 proceeds to step 607, where "is the control end time?"
The fixed-cycle processing ends in response to NO.

In the same manner, the CPU 1 repeats the periodic processing and confirms in step 604 that the current number of operating air conditioners AHU is less than or equal to the target equipment lower limit number n3 (5). To "ON" as the setting output command (minimum value command) at that time
Is output. As a result, the elevator ELV1 is recalled (at time t shown in FIG. 7B).
3 '). That is, the elevator ELV1 is called back to the designated floor and is stopped. This limits the number of elevator ELVs operated from four to three.

When the control end time t4 'is reached, the flow advances to step 608 in response to YES in step 607, and "OFF" is output as the set output command (end time command) at that time. Thereby, the elevator ELV
The recall operation 1 is canceled, and the number of elevator ELVs operated is returned to four.

That is, according to this embodiment, the air conditioner AH
Time t at which the current operating number of U is confirmed as n3 or less
During the period from 3 'to the control end time t4', the elevator EL
Since the number of operating Vs is limited from four to three, the power consumption is reduced accordingly. From time t3 'to time t4', the number of operating air conditioners AHU is small, so that few people are in the facility and elevator E
There is no problem even if the number of operating LVs is reduced by one.

In the above-described embodiment, the interlocking device, that is, the power device according to the present invention is described as the cold / hot water pump P or the elevator ELV, but the power device is not limited to these devices. By applying the present invention in combination with various types of power equipment, it is possible to expect a greater energy saving effect.

[0030]

As apparent from the above description, according to the present invention, the lower limit value k (k ≧ 1) of the number of operating air conditioners is determined in advance.
Is set, and the current number of operating air conditioners is
Operation of all necessary power equipment when the number is below the lower limit value k
Is stopped , so in the control execution time zone,
If the current number of operating air conditioners is below the lower limit k, k units
Despite all air conditioners being operated, all power units
The equipment stops , and energy saving can be achieved in various facilities.

[Brief description of the drawings]

FIG. 1 is a time chart showing a state in which the operation state of a cold / hot water pump is controlled according to the number of operating air conditioners in accordance with the flowchart shown in FIG.

FIG. 2 is a block diagram showing a main part of an embodiment of an air conditioner operating number interlocking control system to which the present invention is applied.

FIG. 3 is a diagram illustrating an example of a device interlocking control screen displayed on a CRT in FIG. 2;

FIG. 4 is a view showing an example of a device interlocking control registration screen displayed on a CRT in FIG. 2;

FIG. 5 is a diagram showing a C / H pump as an interlocking device in FIG.
5 is a flowchart for explaining a processing operation executed by a PU.

FIG. 6 shows a CP in FIG.
9 is a flowchart for explaining a processing operation performed by U.

7 is a time chart showing a situation in which the number of elevators operated is controlled according to the number of air conditioners operated according to the flowchart shown in FIG. 6;

FIG. 8: CW hot / cold water CW via a cold / hot water pump P to the air conditioner
FIG.

[Explanation of symbols]

 1 CPU 2 Hard Disk 3 CRT P Cold / Hot Water Pump AHU (AHU1 to AHUn) Air Conditioner ELV (ELV1 to ELV4) Elevator

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F24F 11/02

Claims (1)

(57) [Claims] 1. A control apparatus according to claim 1, wherein a control start time and a control end time are determined, and a required power device is set during a control execution time period from the control start time to the control end time according to the current number of operating air conditioners. Linked to the number of air conditioners operating to control the operation of
In the control method, the air conditioner operating unit lower limit value k (k ≧ 1) is set in advance,
The number of air conditioners operating is less than or equal to this air conditioner operating unit lower limit value k
Wherein the operation of all the required power devices is stopped at the time of (i).