Method for controlling multi-type air conditioner
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-029/00
F25B-005/00
F25B-041/04
출원번호
US-0879202
(2004-06-30)
우선권정보
KR-10-2004-0003881(2004-01-19)
발명자
/ 주소
Oh,Il Kwon
Shim,Min Sub
Song,Jin Seob
Chang,Se Dong
Park,Bong Soo
Ha,Do Yong
Chang,Seung Yong
출원인 / 주소
LG Electronics Inc.
대리인 / 주소
Greenblum &
인용정보
피인용 횟수 :
3인용 특허 :
2
초록▼
Method for controlling a multi-type air conditioner having a plurality of indoor units each with an expansion valve, an indoor heat exchanger, and an indoor fan, some of which heat rooms, and rest of which are turned off, including the steps of (S11) defining a saturation temperature of refrigerant
Method for controlling a multi-type air conditioner having a plurality of indoor units each with an expansion valve, an indoor heat exchanger, and an indoor fan, some of which heat rooms, and rest of which are turned off, including the steps of (S11) defining a saturation temperature of refrigerant by using a heating cycle of the refrigerant, and Mollier chart, (S12) measuring a temperature of the refrigerant stagnant at the turned off indoor units, (S13) determining if a temperature difference of the refrigerant temperature and the saturation temperature is within a temperature range preset at a control part, (S14) opening the expansion valves of the turned off indoor units, if the temperature difference is within the temperature range preset at the control part, and (S15) closing the expansion valve of the turned off indoor units, if the temperature difference is not within the temperature range preset at the control part, whereby minimizing stagnation of refrigerant at turned off indoor units during some of the indoor units are in operation for heating rooms, and reduce noise occurred when the stagnant refrigerant is removed.
대표청구항▼
What is claimed is: 1. A method for controlling a multi-type air conditioner having a plurality of indoor units each with an expansion valve, an indoor heat exchanger, and an indoor fan, the multi-type air conditioner being operable in a condition wherein some of the indoor units heat rooms, and a
What is claimed is: 1. A method for controlling a multi-type air conditioner having a plurality of indoor units each with an expansion valve, an indoor heat exchanger, and an indoor fan, the multi-type air conditioner being operable in a condition wherein some of the indoor units heat rooms, and a remainder of the indoor units are turned off, the method comprising: defining a saturation temperature of refrigerant by using a heating cycle of the refrigerant, and Mollier chart; measuring a temperature of stagnant refrigerant at the turned off indoor units; determining if a temperature difference between the refrigerant temperature and the saturation temperature is within a preset temperature range; opening the expansion valves of the turned off indoor units, when the temperature difference is within the preset temperature range; and closing the expansion valve of the turned off indoor units, when the temperature difference is not within the preset temperature range. 2. The method as claimed in claim 1, wherein the opening comprises opening the expansion valve within an opening range of 1% and 20%. 3. The method as claimed in claim 1, further comprising again performing the defining, the measuring, and the determining after performing the opening. 4. The method as claimed in claim 1, further comprising again performing the defining, the measuring, the determining, and the opening after performing the closing. 5. The method as claimed in claim 1, wherein the refrigerant is pure refrigerant, and the saturation temperature is a temperature of an intersection of a condensing section of the heating cycle and the Mollier chart. 6. The method as claimed in claim 1, wherein the refrigerant is mixed refrigerant, and the saturation temperature is defined as an average of the temperatures of intersections of a condensing section of the heating cycle and the Mollier chart. 7. The method as claimed in claim 1, wherein the refrigerant is mixed refrigerant, and the saturation temperature is defined as a weighted average of the temperatures intersections of a condensing section of the heating cycle and the Mollier chart. 8. The method as claimed in claim 1, wherein the refrigerant temperature is a temperature of the refrigerant introduced into the indoor heat exchanger. 9. The method as claimed in claim 1, wherein the refrigerant temperature is a temperature of the refrigerant discharged from the indoor heat exchanger. 10. The method as claimed in claim 1, wherein the refrigerant temperature is an average of a temperature of the refrigerant introduced into the indoor heat exchanger, and a temperature of the refrigerant discharged from the indoor heat exchanger. 11. The method as claimed in claim 1, wherein the preset temperature range varies with a room temperature. 12. The method as claimed in claim 1, wherein the preset temperature range varies with an outdoor temperature. 13. The method as claimed in claim 1, wherein the preset temperature range varies with a room temperature and with an outdoor temperature. 14. A method for controlling a multi-type air conditioner having a plurality of indoor units each with an expansion valve, an indoor heat exchanger, and an indoor fan, the multi-type air conditioner being operable in a condition wherein some of the indoor units heat rooms, and a remainder of the indoor units are turned off, the method comprising: defining a room temperature; measuring a temperature of stagnant refrigerant at the turned off indoor units; determining if a difference between the refrigerant temperature and the room temperature is within a preset temperature range; opening the expansion valves of the turned off indoor units, when the temperature difference is within the preset temperature range; and closing the expansion valve of the turned off indoor units, when the temperature difference is not within the preset temperature range. 15. A method for controlling a multi-type air conditioner having a plurality of indoor units each with an expansion valve, an indoor heat exchanger, and an indoor fan, the multi-type air conditioner being operable in a condition wherein some of the indoor units, heat rooms, and a remainder of the indoor units are turned off, the method comprising: opening the expansion valves of the turned off indoor units to a first opening extent; defining a saturation temperature of refrigerant by using a heating cycle of the refrigerant, and Mollier chart; measuring a temperature of stagnant refrigerant at the turned off indoor units; determining if a difference between the refrigerant temperature and the saturation temperature is within a preset temperature range; opening the expansion valves of the turned off indoor units to a second opening extent, greater than the first opening extent, when the temperature difference is within the preset temperature range; and opening the expansion valves of the turned off indoor units to the first opening extent, when the temperature difference is not within the preset temperature range. 16. The method as claimed in claim 15, wherein the first opening extent of the expansion valve is in the range of between 1% and 10%. 17. The method as claimed in claim 16, wherein the second opening extent of the expansion valve is in the range of between 4% and 20%. 18. The method as claimed in claim 15, further comprising again performing the defining, the measuring, the determining, and the opening to the first extent after performing the opening to the second extent. 19. The method as claimed in claim 15, further comprising again performing the defining, the measuring, the determining, the opening to the first extent and the opening to the second extent after performing the opening to the second extent. 20. The method as claimed in claim 15, wherein the refrigerant is pure refrigerant, and the saturation temperature is a temperature of an intersection of a condensing section of the heating cycle and the Mollier chart. 21. The method as claimed in claim 15, wherein the refrigerant is mixed refrigerant, and the saturation temperature is an average of the temperatures of intersections of a condensing section of the heating cycle and the Mollier chart. 22. The method as claimed in claim 15, wherein the refrigerant is mixed refrigerant, and the saturation temperature is a weighted average of the temperatures of intersections of a condensing section of the heating cycle and the Mollier chart. 23. The method as claimed in claim 15, wherein the refrigerant temperature is a temperature of the refrigerant introduced into the indoor heat exchanger. 24. The method as claimed in claim 15, wherein the refrigerant temperature is a temperature of the refrigerant discharged from the indoor heat exchanger. 25. The method as claimed in claim 15, wherein the refrigerant temperature is an average of a temperature of the refrigerant introduced into the indoor heat exchanger, and a temperature of the refrigerant discharged from the indoor heat exchanger. 26. The method as claimed in claim 15, wherein the preset temperature range varies with a room temperature. 27. The method as claimed in claim 15, wherein the preset temperature range varies with an outdoor temperature. 28. The method as claimed in claim 15, wherein the preset temperature range varies with a room temperature and with an outdoor temperature. 29. A method for controlling a multi-type air conditioner having a plurality of indoor units each with an expansion valve, an indoor heat exchanger, and an indoor fan, the multi-type air conditioner being operable in a condition wherein some of the indoor units heat rooms, and a remainder of the indoor units are turned off, the method comprising: opening the expansion valves of the turned off indoor units to a first opening extent; measuring a room temperature; measuring a temperature of stagnant refrigerant at the turned off indoor units; determining if a difference between the stagnant refrigerant temperature and the room temperature is within a preset temperature range; opening the expansion valves of the turned off indoor units to a second opening extent, greater than the first opening extent, when the temperature difference is within the preset temperature range; and opening the expansion valves of the turned off indoor units to the first opening extent, when the temperature difference is not within the preset temperature range.
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