METHOD OF CONTROLLING AIR CONDITIONER

• US 20090240374A1
• Filed: 02/25/2009
• Published: 09/24/2009
• Est. Priority Date: 03/12/2008
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Sung, Dong Won, Huh, Deok, Lee, Gil Bong, Hyun, Seung Youp
• Application Number:
  US12/392,378
• Publication Number:
  US 20090240374A1
• Time in Patent Office: Days
• US Class Current: 700/275
• CPC Class Codes: F25B 49/005 of safety devices F25B49/02 and F25B49/04 take precedence
• CPC Class Codes: F25B 49/025 Motor control arrangements

Abstract

A method of controlling an air conditioner is provided. The method may include determining whether the air conditioner is operating in an abnormal state, and, when the air conditioner is operating in the abnormal state, operating a compressor in a safe mode having a different frequency pattern than when it is operated in a normal mode of the compressor. This allows the air conditioner to provide continuous heating/cooling, even when operating in an abnormal state.

Claims

1. A method of controlling an air conditioner, the method comprising:

operating a compressor of the air conditioner in a normal mode having a first frequency pattern and determining whether the air conditioner is in an abnormal state as the air conditioner operates; and

operating the compressor in a safe mode having a second frequency pattern that is different from the first frequency pattern when it is determined that the air conditioner is in an abnormal state.

2. The method of claim 1, wherein the determining whether the air conditioner is in a abnormal state comprises determining whether a reliability limit condition has been met, comprising:

determining whether an operation frequency of the compressor has reached a predetermined limit frequency, or determining whether a current applied to the compressor has reached a predetermined current.

3. The method of claim 2, further comprising determining whether a number of times the reliability limit condition has been met is greater than or equal to a predetermined number of times during a reference time period.

4. The method of claim 3, wherein, when the number of times the reliability limit condition has been met during the reference time period is greater than zero and less than the predetermined number of times, the method further comprises stopping the compressor for a predetermined amount of time and then resuming operation of the compressor after the predetermined amount of time has elapsed, and when the number of times the reliability limit condition has been met during the reference time period is greater than or equal to the predetermined number of times, the method further comprises operating the compressor in the safe mode.

5. The method of claim 1, wherein the compressor has a plurality of operation modes, including an initial operation mode during which an operating frequency is increased, and a main operation mode which is performed after the initial operation mode has been completed.

6. The method of claim 5, further comprising changing an operation mode of the compressor from the initial operation mode to the main operation mode when the frequency of the compressor in the initial operation mode reaches an initial target frequency.

7. The method of claim 6, wherein an initial operation time corresponding to the initial operation mode when the compressor operates in the safe mode is greater than an initial operation time corresponding to the initial operation mode when the compressor operates in the normal mode.

8. The method of claim 6, wherein a magnitude of frequency in the safe mode is less than an amount of frequency variation in the normal mode.

9. The method of claim 6, wherein a duration of frequency variation in the safe mode is greater than a duration of frequency variation in the normal mode.

10. The method of claim 4, wherein a target frequency of the compressor in the safe mode is less than a target frequency of the compressor in the normal mode.

11. The method of claim 1, further comprising displaying the abnormal state of the air conditioner on a display while the compressor operates in the safe mode.

12. A method of controlling an air conditioner, the method comprising:

operating a compressor;

determining whether a reliability limit condition of the air conditioner has been met while operating of the compressor;

determining whether a cumulative number of times the reliability limit condition has been met is greater than or equal to a predetermined number of times; and

controlling operation of the compressor based on the cumulative number of times the reliability limit condition has been met.

13. The method of claim 12, wherein controlling operation of the compressor based on the cumulative number of times the reliability limit condition has been met comprises:

when the cumulative number of times the reliability condition has been met is less than the predetermined number of times, stopping the compressor is stopped for a predetermined amount of time, and then resuming operation of the compressor after the predetermined amount of time has elapsed; and

when the cumulative number of times that the reliability limiting condition has been met is greater than or equal to the predetermined number of times, operating the compressor in a safe mode having an operation pattern that is different from an operation pattern of the compressor in a normal mode.

14. The method of claim 13, wherein a speed or a size of frequency variation of the compressor in the safe mode is less than a speed or a size of frequency variation of the compressor in the normal mode.

15. The method according to claim 13, wherein a duration of frequency variation in the safe mode is greater than a duration of frequency variation in the normal mode.

16. The method of claim 13, wherein a target frequency or a limit frequency of the compressor in the safe mode is set lower than a target frequency or a limit frequency in the normal mode.