Central control system and method for controlling air conditioners

• US 7,661,603 B2
• Filed: 10/03/2003
• Issued: 02/16/2010
• Est. Priority Date: 12/10/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yoon, Sang Chul, Kwon, Jae Hwan, Jeon, Duck Gu, Jung, Jae Sik
• Primary Examiner(s): Jules; Frantz F
• Assistant Examiner(s): AZIM, ABDUR RAHIM
• Application Number:
  US10/677,305
• Publication Number:
  US 20040107717A1
• Time in Patent Office: 2,328 Days
• Field of Search: 621/57, 622/31, 621/75, 236/51, 700/295, 700/276
• US Class Current: 236/51
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/54 using one central controller connected to several sub-controllers
• CPC Class Codes: F24F 11/58 using Internet communication
• CPC Class Codes: F24F 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: F25B 2700/05 Load shedding of a compressor

Abstract

A central control system and method for controlling air conditioners. The central control system performs central control operations for the air conditioners according to an operation schedule or control command inputted from a central controller coupled to the air conditioners through an internal network or a remote controller accessible to an external Internet network. When the air conditioners are simultaneously operated, control signals based on the control command are adjusted to prevent electric power consumption from abruptly increasing and hence the stability and reliability of control can be improved. The central controller includes a touch screen-based monitor. A control program included in the central controller provides a timetable corresponding to a specified period. An operator can conveniently input/edit the operation schedule through a dragging operation performed on the monitor, and confirm the inputted/edited operation schedule.

Claims

1. A central control system for controlling air conditioners, comprising:

a plurality of air conditioners installed indoors that perform air conditioning operations; and

a central controller that receives a control command to control the plurality of air conditioners, that monitors operating states of the controlled air conditioners, that automatically schedules control signals corresponding to the control command so that start times for operation of individual ones of the plurality of air conditioners can be adjusted to manage electric power consumption due to simultaneously operating the plurality of air conditioners, and that outputs the scheduled control signals to the plurality of air conditioners;

wherein the central controller estimates a total amount of instant electric power consumption of the plurality of air conditioners; and

based upon whether the total amount of estimated instant electric power exceeds an allowable range, the central controller adjusts an operation schedule of each of the plurality of air conditioners enabling the start times of each of the plurality of air conditioners to differ according to delay times, the central controller comprising;

a touch screen-based monitor configured to input the control command through a screen touch operation,

wherein the central controller displays a control program for controlling operations of the air conditioners, the control program being executed so that a timetable in which an operation schedule for the plurality of air conditioners corresponding to a specified period can be displayed on the monitor, and the timetable can be input and edited from the monitor, the timetable having a number of cells, the control program converting colors of cells selected to input the operation schedule for the plurality of air conditioners can be distinguished from non-selected cells, and the selected cells distinguished by the colors can be displayed, the control program being further configured to receive the operation schedule of the designated air conditioners by dragging and selecting the cells on the monitor.

2. The central control system as set forth in claim 1, wherein the air conditioners are connected to an internal network, and the air conditioners are assigned different internet protocol addresses so that the air conditioners can be distinguished from each other.

3. The central control system as set forth in claim 2, further comprising:

an internet protocol sharer connected to the central controller that performs an integrated management operation for the internet protocol addresses assigned to the air conditioners.

4. The central control system as set forth in claim 1, the central controller comprising:

a control program execution module that receives the control command and executes a control program so that information of the operating states can be output in response to the control command;

a manager module that transmits the control command input through the control program to the plurality of air conditioners, that monitors operating states of the controlled air conditioners, and that manages a time schedule of the control signals to be output to the plurality of air conditioners so that time intervals between operation of the plurality of air conditioners can be adjusted; and

a global manager module that globally controls the manager module.

5. The central control system as set forth in claim 4, the manager module comprising:

a monitoring manager that communicates data with the plurality of air conditioners and that monitors the operating states of the controlled air conditioners;

a schedule manager that generates a time schedule according to the control command input through the control program; and

a power manager that adjusts time intervals between operations of the plurality of air conditioners.

6. The central control system as set forth in claim 5, the manager module further comprising:

a client manager that provides a web page so that the control command can be input and the operating states of the controlled air conditioners can be monitored by a remote controller coupled to the central controller through the internet network.

7. The central control system as set forth in claim 5, wherein the schedule manager is connected to a database, and reads the control command input through the control program and state data from the database.

8. A method for controlling a plurality of air conditioners in a central control system, comprising:

transmitting, to the plurality of air conditioners, an operation schedule and a control command input through a central controller capable of performing central control operations for the plurality of air conditioners, and simultaneously monitoring operating states of the plurality of air conditioners;

generating control signals so that the plurality of air conditioners can be operated in response to the operation schedule and the control command input at the transmitting; and

adjusting start times for operation of each of the plurality of air conditioners to manage electric power consumption;

wherein inputting the operation schedule for the plurality of air conditioners comprises;

displaying a timetable having a plurality of cells on a touch screen based monitor of the central controller;

receiving the operation schedule by dragging and selecting the cells on the monitor;

displaying the selected cells on the monitor to define the operation schedule, the timetable being input-able and editable from the monitor;

displaying the selected cells with colors different from non-selected cells, and

adjusting an operation schedule of each of the plurality of air conditioners to enable the start times of each of the plurality of air conditioners to differ according to a delay time, based upon whether an estimated total amount of instant electric power consumed by the plurality of air conditioners exceeds an allowable range.

9. The method as set forth in claim 8, the transmitting comprising:

sensing a control request from a remote controller for inputting control command data to the plurality of air conditioners through an internet network;

storing the control command data input by the remote controller in the database of the central controller; and

transmitting the control command data stored in the database to the plurality of air conditioners and monitoring operating states of the plurality of air conditioners.

10. The method as set forth in claim 8, wherein the dragging comprises:

determining whether cells have been touched and selected;

ascertaining whether an operating mode is a schedule editing mode when the cells have been touched and selected;

releasing the operation schedule associated with previously selected cells when the operating mode is the schedule editing mode; and

repeating the determining, ascertaining and releasing when no previously selected cells exist.