JP6158063B2 - Centralized control system - Google Patents

Description

  The present invention relates to a centralized control system that centrally controls an air conditioner and a stove installed in each room in a school, hospital, public facility, or the like having a large number of partitioned rooms.

  Conventionally, in this type, the operation and stop state of each heater is sent to the display unit of the central control panel via a control signal line, so that the current operation of each heater and The stop state is displayed, and the operation state can be seen at a glance by looking at the display section. (For example, refer to Patent Document 1.)

JP 2001-165493 A

  By the way, with this conventional device, when the control signal line is longer than the specified length, when the wire diameter is less than the specified length, or when the connecting portion for branching or extending the control signal line is processed. If it is insufficient, the wiring impedance (resistance) becomes large, and it is difficult to detect the state of barely communicating.

  In order to solve the above-described problems, the present invention particularly has a configuration in which a plurality of air conditioners are connected to a central control panel via a control signal line, and various operation settings of the air conditioners are connected to the central control panel. It has a display / operation screen for displaying settings, and the air conditioner performs program operation to control operation start and stop at the date and time set on the operation screen. Is provided with a constant current circuit that connects two control signal lines connected to each air conditioner with a pair of resistors, and calculates a wiring impedance for each control signal line connected to each air conditioner. It is a thing.

Further in claim 2, comprising a voltage level monitor for displaying the line impedance calculated for each of said control signal lines, when compared with the calculated wire impedance and threshold on threshold than is An error is displayed.

  As described above, according to the present invention, the abnormality for each control signal line connected to each air conditioner can be easily detected by the constant current circuit, and the wiring state is always good, for example, by rewiring. Thus, reliable signal transmission / reception is performed and good centralized control is obtained.

  According to the second aspect of the present invention, the wiring impedance can be monitored at the voltage level, the abnormal control signal line can be quickly found and dealt with, and it is very convenient to use.

1 is a schematic configuration diagram of a centralized control system according to an embodiment of the present invention. The wiring diagram of the same control signal line. Explanatory drawing of the initial setting screen of the same operation screen. Explanatory drawing of the group setting screen of the same operation screen. Explanatory drawing of the weekly timer setting screen of the same operation screen. Explanatory drawing of the monitor screen classified by group of the same operation screen. The flowchart at the time of the same all stop switch operation. The flowchart at the time of the operation end switch operation of the same day. Explanatory drawing of the monitor screen. Explanatory drawing of the same information screen.

An embodiment of a centralized control system of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a centralized control panel composed of a panel computer, which has a 15-inch touch panel display operation screen 2 and can be connected to a keyboard (not shown) at the time of initial setting, and various settings can be made by inputting characters and numbers. As a possible, centralized control such as operation start / stop of a plurality of air conditioners and room temperature control, which will be described later, is performed.
Reference numeral 3 denotes a distributor constituting the centralized control panel 1 together with the operation screen 2, and two control signal lines 5 connecting up to 32 air conditioners 4 made of FF type oil stoves installed in each room are connected two by two. Thus, four distributors 3 are provided, and a maximum of 256 air conditioners 4 can be connected to perform centralized control such as operation start / stop and room temperature control.

Reference numeral 6 denotes an initial setting switch on the operation screen 2 for initial setting of centralized control. Subsequently, when the system setting switch 7 is pressed, the operation screen 2 is switched to the system setting screen, and the system property name, The date of introduction can be entered and stored in the folder.
Reference numeral 8 denotes a model setting switch. When pressed after the initial setting switch 6, the operation screen 2 is switched to the model setting screen, and a maximum of 20 types can be registered.

  Reference numeral 9 denotes a group setting switch. When pressed after the initial setting switch 6, the operation screen 2 switches to the group setting screen, and groups of 20 items such as the first floor west and the second floor east can be set. 30 air conditioners 4 can be divided.

  Reference numeral 10 denotes a program setting switch in the operation screen 2. When the switch is pressed, the program setting screen is displayed. A weekly timer switch 11, an annual timer switch 12, and a date / time switch 13 are displayed, and then the weekly timer switch 11 is pressed. For example, the timetable for a week of first grader is displayed on the program display, and it is possible to set each day of the week to be driven by the program operation and whether to drive or stop for each time, and press the annual timer switch 12 continuously. 4 months ago and 4 months later will be displayed, up to 13 years later will be displayed based on the current month, and you can set the program operation for the day you want to drive, then press the date / time switch 13 For example, the date and time are displayed, and the date and time are set on this screen.

  14 is a monitor switch that displays the current settings and operation status for each group that has been grouped in advance, and can be used to start and stop manual operation, switch from manual operation to program operation, and vice versa. The batch operation and stop operation and the set temperature can be changed.

  Reference numeral 15 denotes a program operation switch for starting the operation of the air conditioner 4 set to the program operation, that is, starting / stopping the operation at a preset date and time or temperature, and is set over a set period. Operation is controlled as expected.

  16 is a full stop switch that forcibly stops all air-conditioning equipment 4 when pressed in an emergency such as an abnormal state, and all operations are stopped regardless of manual operation or program operation. The program operation is not resumed unless the program operation switch 15 is pressed again when the program operation switch 15 is pressed again while waiting for the time due to the operation stop.

  Reference numeral 17 denotes an operation end switch for today, which forcibly stops the operation of all the air-conditioning devices 4 when pressed in an emergency, but for program operation, the date goes to midnight and the date changes to the next day's date. By changing, program operation is automatically resumed without any additional operation, that is, all of today's centralized control operation is stopped by pressing today's operation end switch 17, but at least program operation Will start operation the next day and is extremely convenient.

  18 is a slave unit composed of an external alarm connected to the middle of the control signal line 5 connecting the distributor 3 and the grouped air-conditioning equipment 4. A switch is connected, and up to three units can be installed for each distributor 3.

  When the monitor switch 14 is pressed when the air conditioner 4 is out of order, the operation screen 2 is switched to the monitor screen 19, and when the group-specific monitor switch 20 is pressed, the number or error code of the group-specific air conditioner 4 or error content is displayed. In addition, the processing method is an error display 21, and it is not necessary to check the error state by going to the place where the air conditioner 4 is installed one by one.

  22 is an information switch. When pressed, the operation screen 2 is switched to the information screen 23. When the error history switch 24 is pressed, the error contents are stored together with the date and time when the error occurred, and the stored contents are sorted in the order of occurrence. Since the information is displayed on the information screen 23 and the past error contents can be confirmed, the repair of the failure can be performed smoothly and surely and used safely.

Reference numeral 26 denotes a centralized control panel 1, and each air conditioner 4 is a constant current circuit to which two control signal lines 5 having a pair of resistors 27 are connected. The constant current circuit 26 includes an operational amplifier 27 and a transistor 28. 4 to control the voltage so that a constant current flows through the control signal line 5 connecting the centralized control panel 1, and while watching the voltage level monitor 29 connected between the two control signal lines 5 after the construction, By passing a constant current through the control signal line 5 for each air conditioner 4 and detecting the voltage between the control signal lines 5, the wiring impedance can be calculated and displayed. If on the threshold or more as compared to are those for displaying an error indication for each air conditioner 4 in information screen 23 or the voltage level monitor 29.

Next, the inspection of the wiring impedance after the construction of this centralized control system will be described. A constant current is passed from the constant current circuit 26 to the control signal line 5 for each air conditioner 4 in order, and the voltage between the control signal lines 5 by detecting, displays the voltage level monitor 29 calculates the wiring impedance, when on the threshold than the calculated wiring impedance is compared with the threshold value, an error display in the voltage level monitor 29 Is also displayed.

  As a result, when the length of each control signal line 5 connected to each air conditioner 4 is longer than specified, when the wire diameter is less than specified, or for branching or extending the control signal line Abnormalities such as insufficient processing at the connection part can be easily detected by the constant current circuit 26, and a good wiring state is always obtained by re-routing the wiring, and reliable signal exchange is performed. Good centralized control can be obtained, the wiring impedance can be monitored at the voltage level, the abnormal control signal line 5 can be quickly found and dealt with, and it is very convenient to use.

  Next, the operation of this centralized control system will be described. In this state, after various settings for manual operation and program operation are performed on the centralized control panel 1, each air conditioner 4 is operated and controlled by this centralized control. As shown in the flowchart of FIG. 7, when an emergency occurs and it is necessary to stop the operation of all the air conditioners 4, all stop switches 16 that are always displayed on the operation screen 2 are pressed (step 30). ) Yes, the process proceeds to step 31 where all the air conditioners 4 are stopped regardless of the manual operation or the program operation. The program operation is stopped even during the time waiting for the operation stop and the program operation switch 15 is pressed again. Otherwise, program operation will not resume.

  In the emergency state, all the air conditioners 4 are all stopped. However, when the program operation is to be resumed after tomorrow only, the operation screen 2 is displayed as shown in the flowchart of FIG. If the today's operation end switch 17 that is always displayed is pressed (step 32), the process proceeds to step 33 with YES, and the operation of all the air conditioners 4 is stopped regardless of manual operation or program operation. Is not cancelled, and the routine proceeds to step 34, where it is determined whether the current time has passed around midnight and the next day has been reached, and if yes, the routine proceeds to step 35 and the program operation is resumed.

  As a result, when stopping the operation of all the air-conditioning equipment 4 without resuming the program operation, the entire stop switch 16 is pressed to stop it completely, so that it is possible to cope with an emergency such as a disaster and to ensure safety easily. However, if the emergency stop is not so much emergency, or if it should be stopped only for one day today, the operation end switch 17 of the current day is pressed to stop it all. There is no need for setting, and the program operation is automatically restarted by changing the date of the day, which is extremely convenient and can be used with confidence.

  On the other hand, when the air conditioner 4 breaks down, the operation screen 2 is switched to the monitor screen 19 by pressing the monitor switch 14, and when the group-specific monitor switch 20 is further pressed, the error content and processing method are displayed as an error 21. Therefore, it is not necessary to check the error state by going to the installation place of the air conditioner 4 one by one, and can be confirmed by the centralized control panel 1.

  When the information switch 22 is pressed, the operation screen 2 is switched to the information screen 23, and when the error history switch 24 is further pressed, the stored error contents are generated and sorted in the order of occurrence. Then, it is displayed on the information screen 23 as an information display 25, and repairs and repairs can be made while confirming past error contents, so that the repair of the failure can be carried out smoothly and reliably and used with peace of mind.

1 Central control panel 2 Operation screen 4 Air conditioning equipment 5 Control signal line 26 Constant current circuit 29 Voltage level monitor

Claims (2)

  A plurality of air conditioners are connected to the central control panel via a control signal line, and the central control panel has various operation settings for the air conditioners and a display / operation screen for displaying these settings. In the case of performing a program operation for controlling the start and stop of operation according to the date and time set on the operation screen, the air conditioner is connected to the central control panel with a pair of resistors. A centralized control system comprising a constant current circuit for connecting two control signal lines, and calculating a wiring impedance for each control signal line connected to each air conditioner. Comprising a voltage level monitor for displaying the line impedance calculated for each of said control signal lines, when compared with the calculated wire impedance and threshold on threshold than was to be error display The centralized control system according to claim 1, wherein:

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