IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0652397
(2010-01-05)
|
등록번호 |
US-8567203
(2013-10-29)
|
우선권정보 |
KR-10-2009-0000925 (2009-01-06) |
발명자
/ 주소 |
- Jang, Ji Young
- Song, Chi Woo
- Chung, Baik Young
- Oh, Sai Kee
|
출원인 / 주소 |
|
대리인 / 주소 |
McKenna Long & Aldridge LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
An air conditioner is provided, in which some of a plurality of outdoor heat exchangers implement a defrosting operation and others implement a heating operation. The air conditioner includes a compressor to compress refrigerant, a hot gas pipe to which a part of the refrigerant compressed in the co
An air conditioner is provided, in which some of a plurality of outdoor heat exchangers implement a defrosting operation and others implement a heating operation. The air conditioner includes a compressor to compress refrigerant, a hot gas pipe to which a part of the refrigerant compressed in the compressor is moved, a 4-way valve to which the remaining refrigerant compressed in the compressor is moved, an indoor heat exchanger in which the refrigerant, having passed through the 4-way valve, undergoes heat exchange with indoor air, and a plurality of outdoor heat exchangers, some of which implement a heating operation as the heat-exchanged refrigerant from the indoor heat exchanger is moved therethrough while others implement a defrosting operation as the refrigerant having passed through the hot gas pipe is moved therethrough.
대표청구항
▼
1. An air conditioner comprising: a compressor to compress refrigerant;a hot gas pipe that receives a part of the refrigerant compressed in the compressor;a 4-way valve that receives the remaining refrigerant compressed in the compressor;an indoor heat exchanger that receives the refrigerant from th
1. An air conditioner comprising: a compressor to compress refrigerant;a hot gas pipe that receives a part of the refrigerant compressed in the compressor;a 4-way valve that receives the remaining refrigerant compressed in the compressor;an indoor heat exchanger that receives the refrigerant from the 4-way valve and that exchanges heat with indoor air; anda plurality of outdoor heat exchangers, some of which implement a heating operation as the heat-exchanged refrigerant is received from the indoor heat exchanger and passes therethrough while others implement a defrosting operation as the refrigerant is received from the hot gas pipe,wherein the hot gas pipe includes:a main pipe with one end connected between the compressor and the 4-way valve;a plurality of connecting pipes to connect the main pipe and the plurality of outdoor heat exchangers to each other; anda plurality of defrosting valves installed on each of the plurality of connecting pipes. 2. The air conditioner of claim 1, wherein: the plurality of outdoor heat exchangers includes a first outdoor heat exchanger and a second outdoor heat exchanger;the plurality of connecting pipes includes a first connecting pipe communicating with the first outdoor heat exchanger and a second connecting pipe communicating with the second outdoor heat exchanger; andthe plurality of defrosting valves includes a first defrosting valve installed on the first connecting pipe and a second defrosting valve installed on the second connecting pipe. 3. The air conditioner of claim 2, wherein the first outdoor heat exchanger implements a defrosting operation by receiving the refrigerant from the hot gas pipe and thereafter implements a heating operation by receiving the heat-exchanged refrigerant from the indoor heat exchanger. 4. The air conditioner of claim 3, wherein the second outdoor heat exchanger implements a heating operation by receiving the heat-exchanged refrigerant from the indoor heat exchanger when the first outdoor heat exchanger implements the defrosting operation. 5. The air conditioner of claim 3, wherein the second outdoor heat exchanger implements a defrosting operation by receiving the refrigerant from the hot gas pipe when the first outdoor heat exchanger implements the heating operation. 6. The air conditioner of claim 3, wherein the first defrosting valve is opened during the defrosting operation of the first outdoor heat exchanger. 7. The air conditioner of claim 6, wherein the first defrosting valve is closed during the heating operation of the first outdoor heat exchanger. 8. The air conditioner of claim 3, further comprising a first expansion valve located between the first outdoor heat exchanger and the indoor heat exchanger, wherein an opening rate of the first expansion valve is limited to a minimum opening rate during the defrosting operation of the first outdoor heat exchanger. 9. The air conditioner of claim 8, wherein the first expansion valve is set to a normal opening rate during the heating operation of the first outdoor heat exchanger. 10. The air conditioner of claim 1, further comprising an outdoor expansion unit to expand the heat-exchanged refrigerant from the indoor heat exchanger. 11. The air conditioner of claim 10, wherein the outdoor expansion unit includes a plurality of expansion valves to expand the refrigerant to be introduced into the plurality of outdoor heat exchangers. 12. A defrosting method of an air conditioner comprising: performing a heating operation by moving refrigerant compressed in a compressor into an indoor heat exchanger;sequentially performing a defrosting operation of a plurality of outdoor heat exchangers by moving a part of the compressed refrigerant from the compressor into some of the plurality of outdoor heat exchangers; andresuming the heating operation by moving all of the compressed refrigerant from the compressor into the indoor heat exchanger,wherein the defrosting operation method further comprising:determining a defrosting condition by measuring a temperature of outdoor air at the plurality of outdoor heat exchangers or a pressure of the refrigerant at an inlet of the compressor,wherein the defrosting operation is performed when the defrosting condition is present. 13. A defrosting method of an air conditioner comprising: performing a heating operation by moving refrigerant compressed in a compressor into an indoor heat exchanger;sequentially performing a defrosting operation of a plurality of outdoor heat exchangers by moving a part of the compressed refrigerant from the compressor into some of the plurality of outdoor heat exchangers; andresuming the heating operation by moving all of the compressed refrigerant from the compressor into the indoor heat exchanger,wherein the plurality of outdoor heat exchangers includes a first outdoor heat exchanger and a second outdoor heat exchanger; andthe performance of the defrosting operation includes:performing a first defrosting operation in such a manner that the first outdoor heat exchanger performs a defrosting operation by receiving a part of the refrigerant compressed in the compressor and the second outdoor heat exchanger performs a heating operation by receiving the refrigerant discharged from the indoor heat exchanger; andperforming a second defrosting operation in such a manner that the second outdoor heat exchanger performs a defrosting operation by receiving a part of the refrigerant compressed in the compressor and the first outdoor heat exchanger performs a heating operation by receiving the refrigerant discharged from the indoor heat exchanger. 14. The defrosting operation method of claim 13, wherein the performance of the defrosting operation includes: determining when to complete the first defrosting operation by measuring a temperature of the refrigerant at the first outdoor heat exchanger; anddetermining when to complete the second defrosting operation by measuring a temperature of the refrigerant at the second outdoor heat exchanger. 15. The defrosting operation method of claim 13, wherein the performance of the first defrosting operation includes: opening a first defrosting valve to cause a part of the refrigerant compressed in the compressor to be diverted into the first outdoor heat exchanger; andlimiting an opening rate of a first expansion valve, located between the first outdoor heat exchanger and the indoor heat exchanger, to a minimum opening rate. 16. The defrosting operation method of claim 15, wherein the performance of the second defrosting operation includes: closing the first defrosting valve and opening a second defrosting valve to cause a part of the refrigerant compressed in the compressor to be diverted into the second outdoor heat exchanger; andsetting the first expansion valve to a normal opening rate and limiting an opening rate of a second expansion valve, located between the second outdoor heat exchanger and the indoor heat exchanger, to a minimum opening rate. 17. The defrosting method of claim 12, wherein: the plurality of outdoor heat exchangers includes a first outdoor heat exchanger, a second outdoor heat exchanger, and a third outdoor heat exchanger; andthe performance of the defrosting operation includes:performing a first defrosting operation by diverting a part of the refrigerant compressed in the compressor into the first outdoor heat exchanger and the second outdoor heat exchanger and the third outdoor heat exchanger performs a heating operation as the refrigerant discharged from the indoor heat exchanger is diverted into the second outdoor heat exchanger and the third outdoor heat exchanger;performing a second defrosting operation by diverting a part of the refrigerant compressed in the compressor into the second outdoor heat exchanger and the first outdoor heat exchanger and the third outdoor heat exchanger perform a heating operation as the refrigerant discharged from the indoor heat exchanger is diverted into the first outdoor heat exchanger and the third outdoor heat exchanger; andperforming a third defrosting operation by diverting a part of the refrigerant compressed in the compressor into the third outdoor heat exchanger and the first outdoor heat exchanger and the second outdoor heat exchanger perform a heating operation as the refrigerant discharged from the indoor heat exchanger is diverted into the first outdoor heat exchanger and the second outdoor heat exchanger. 18. The defrosting operation method of claim 12, wherein: the plurality of outdoor heat exchangers includes a first outdoor heat exchanger, a second outdoor heat exchanger, and a third outdoor heat exchanger; andthe performance of the defrosting operation includes:performing a first defrosting operation by diverting a part of the refrigerant compressed in the compressor into the first outdoor heat exchanger and the second outdoor heat exchanger and the third outdoor heat exchanger perform a heating operation as the refrigerant discharged from the indoor heat exchanger is diverted into the second outdoor heat exchanger and the third outdoor heat exchanger; andperforming a second defrosting operation by diverting a part of the refrigerant compressed in the compressor into the second outdoor heat exchanger and the third outdoor heat exchanger and the first outdoor heat exchanger performs a heating operation as the refrigerant discharged from the indoor heat exchanger is diverted into the first outdoor heat exchanger. 19. An air conditioner comprising: a compressor to compress refrigerant;a hot gas pipe that receives a part of the refrigerant compressed in the compressor;a 4-way valve that receives the remaining refrigerant compressed in the compressor;an indoor heat exchanger that receives the refrigerant from the 4-way valve and that exchanges heat with indoor air;a plurality of outdoor heat exchangers with a sensor that detects frosting of the heat exchanger, some of which implement a heating operation as the heat-exchanged refrigerant from is received from the indoor heat exchanger and passes therethrough while others implement a defrosting operation as the refrigerant is received from the hot gas pipe; anda controller receiving a frosting indication from the plurality of sensors, the controller controlling the defrosting of the outdoor heat exchangers according to the frosting indication,wherein the sensor is a first temperature sensor that measures the temperature of refrigerant discharged from the outdoor heat exchanger. 20. The air conditioner of claim 19, further comprising a plurality of defrost valves each between the hot gas pipe and an input to each of the outdoor heat exchangers. 21. The air conditioner of claim 20, wherein the controller opens one of the defrost valves to defrost the attached outdoor heat exchanger. 22. The air conditioner of claim 19, wherein the sensor further includes a second temperature sensor that measures an outdoor air temperature at the outdoor heat exchanger. 23. The air conditioner of claim 22, wherein the outdoor air temperatures is of outdoor air that has passed through the outdoor heat exchanger.
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