Method for controlling air conditioning system

• US 20060184283A1
• Filed: 04/01/2005
• Published: 08/17/2006
• Est. Priority Date: 02/15/2005
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Ju Youn, Choi, Ho Seon
• Application Number:
  US11/095,563
• Publication Number:
  US 20060184283A1
• Time in Patent Office: Days
• US Class Current: 700/276
• 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 11/62 characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
• CPC Class Codes: F24F 11/65 for selecting an operating mode
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2110/50 Air quality properties
• CPC Class Codes: F24F 2110/70 Carbon dioxide
• CPC Class Codes: F24F 2110/76 Oxygen
• CPC Class Codes: F24F 8/60 by adding oxygen
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

Method for controlling an air conditioning system including the steps of measuring a Predicted Mean Vote (PMV) according to thermal environmental parameters of a room, performing a first air conditioning mode if the PMV falls outside of a preset allowable range, for controlling an air flow speed and a room temperature, and performing a second air conditioning mode if the PMV falls within the allowable range, for controlling ventilation and air cleaning operation, whereby improving the IAQ (Indoor Air Quality) further by enhancing the PPIS by performing air conditioning so that the PMV reaches to an optimum range, and then, by generating active materials (oxygen/terpene).

Claims

1. A method for controlling an air conditioning system comprising the steps of:

measuring a Predicted Mean Vote (PMV) according to thermal environmental parameters of a room;

performing a first air conditioning mode if the PMV falls outside of a preset allowable range, for controlling an air flow speed and a room temperature; and

performing a second air conditioning mode if the PMV falls within the allowable range, for controlling ventilation and air cleaning operation.

2. The method as claimed in claim 1, wherein the thermal environmental parameters include at least one of an air temperature, humidity, an air flow speed, a mean radiation temperature, a wearing clothes amount, and activity.

3. The method as claimed in claim 1, wherein the step of performing a first air conditioning mode includes the steps of;

detecting the present room temperature and an activity of people in the room if the PMV falls outside of the allowable range,

determining the air flow speed and the room temperature according to the detected temperature and the activity, and

operating the air conditioner according to the determined air flow speed and the room temperature.

4. The method as claimed in claim 3, wherein the air flow speed and the room temperature, which are object of control in the first air conditioning mode, are determined as values determined in advance according to the detected temperature and the activity.

5. The method as claimed in claim 3, wherein the step of determining the air flow speed and the room temperature according to the detected temperature and the activity includes the steps of;

selecting a level of the detected temperature from a plurality of reference levels of temperatures,

selecting a level of the detected activity from a plurality of reference levels of activities, and

determining the air flow speed and the room temperature as an air flow speed and a room temperature defined in advance for the selected temperature and the activity.

6. The method as claimed in claim 3, wherein the step of performing a first air conditioning mode further includes the steps of;

measuring the PMV of the room periodically during the air conditioner is operating at the determined air flow speed and room temperature,

determining the measured PMV of falling within the allowable range, and

operating the air conditioner at the determined air flow speed and room temperature until the PMV reaches to the allowable range.

7. The method as claimed in claim 1, wherein the step of performing a second air conditioning mode includes the steps of;

performing a ventilating mode according to a carbon dioxide concentration of the room if the PMV is within the allowable range, and

performing an air cleaning mode according to an oxygen concentration of the room after the ventilating mode is performed.

8. The method as claimed in claim 7, wherein the step of performing a ventilating mode according to a carbon dioxide concentration includes the steps of;

detecting the present carbon dioxide concentration of the room,

determining the detected carbon dioxide concentration of being over a preset reference value, and

performing a ventilating mode if the carbon dioxide concentration is over the reference value, in which introduction of outdoor air and discharge of room air are repeated.

9. The method as claimed in claim 8, wherein the step of performing a ventilating mode according to a carbon dioxide concentration includes the steps of;

detecting a carbon dioxide concentration of the room periodically during the ventilating mode is performed,

determining the detected carbon dioxide concentration of dropping below a reference value as the ventilating mode is performed, and

stopping the ventilating mode if the carbon dioxide concentration drops below the reference value.

10. The method as claimed in claim 7, wherein the step of performing an air cleaning mode according to an oxygen concentration includes the steps of;

detecting the present oxygen concentration of the room,

determining the detected oxygen concentration of being below a preset reference value, and

performing an oxygen generating mode if the oxygen concentration is below the reference value, for generating oxygen.

11. The method as claimed in claim 10, wherein the step of performing an air cleaning mode according to an oxygen concentration includes the steps of,

detecting the oxygen concentration of the room periodically during the oxygen generating mode is performed,

determining the detected oxygen concentration rising above the reference value as the oxygen generating mode is performed, and

stopping the oxygen generating mode if the oxygen concentration rises above the reference value.

12. The method as claimed in claim 10, wherein the step of performing an air cleaning mode according to an oxygen concentration further includes the steps of;

performing a terpene generating mode for generating terpene after the oxygen generating mode is performed.