An air conditioner is provided. The air conditioner includes a compressor for compressing a refrigerant, an oil separator for separating an oil of the refrigerant discharged from the compressor to collect the separated oil into the compressor, a condenser for condensing the refrigerant separated fro
An air conditioner is provided. The air conditioner includes a compressor for compressing a refrigerant, an oil separator for separating an oil of the refrigerant discharged from the compressor to collect the separated oil into the compressor, a condenser for condensing the refrigerant separated from the oil separator, and a supercooling part in which a main refrigerant that is the refrigerant condensed by the condenser is heat-exchanged with a branch refrigerant branched from the main refrigerant. At least a portion of the oil collected into the compressor passes through the supercooling part.
대표청구항▼
1. An air conditioner comprising: a compressor for compressing and discharging a refrigerant;an oil separator for separating an oil from the refrigerant discharged from the compressor, wherein the separated oil is collected back in the compressor;a condenser for condensing the refrigerant remaining
1. An air conditioner comprising: a compressor for compressing and discharging a refrigerant;an oil separator for separating an oil from the refrigerant discharged from the compressor, wherein the separated oil is collected back in the compressor;a condenser for condensing the refrigerant remaining after oil separation by the oil separator; anda supercooling part in which a condensed refrigerant from the condenser is heat-exchanged with a branch refrigerant, wherein the branch refrigerant is branched from the condensed refrigerant,wherein the supercooling part comprises a first supercooler for supercooling the condensed refrigerant; and a second supercooler connected to the first supercooler in series to supercool the condensed refrigerant passing through the first supercooler,wherein heat is exchanged in the first supercooler between a first passage through which the condensed refrigerant flows and a second passage through which the branch refrigerant flows, andwherein heat is exchanged in the second supercooler between a third passage through which the condensed refrigerant flows, a fourth passage through which the branch refrigerant from the condensed refrigerant flows, and a fifth passage through which the oil flows. 2. The air conditioner according to claim 1, wherein the second passage connects the first supercooler to a first injection introduction part on the compressor, andthe fourth passage connects the second supercooler to a second injection introduction part on the compressor. 3. The air conditioner according to claim 1 further comprising: an accumulator for separating a gaseous refrigerant from the refrigerant and supplying the separated gaseous refrigerant back to the compressor; andan oil collection passage for collecting and guiding the oil separated by the oil separator back into the compressor,wherein the oil collection passage is connected to a suction passage extending from the accumulator to the compressor. 4. The air conditioner according to claim 3, wherein the fifth passage connects one position of the oil collection passage to the second supercooler to guide the oil collected by the oil collection passage into the second supercooler, wherein the oil collected and guided into the second supercooler is cooled by the second supercooler. 5. The air conditioner according to claim 4, further comprising a second oil injection passage connected to the fifth passage to discharge the oil cooled in the second supercooler, wherein the second oil injection passage is connected to a combination part of the fourth passage. 6. The air conditioner according to claim 5, wherein a check valve is disposed in the injection passage between the combination part of the fourth passage and an injection expansion valve disposed in the fourth passage, wherein the check valve prevents the oil flowing in the second oil injection passage from flowing backward toward the injection expansion valve. 7. The air conditioner according to claim 1, wherein, when a cooling operation is performed, the second supercooler supercools the condensed refrigerant that is supercooled in the first supercooler, and when a heating operation is performed, the first supercooler supercools the condensed refrigerant that is supercooled in the second supercooler. 8. The air conditioner according to claim 1, wherein the oil separated by the oil separator is selectively cooled in the second supercooler and collected in the compressor. 9. The air conditioner according to claim 1, further comprising: a first oil injection passage connecting the oil separator to the second supercooler; anda second oil injection passage, wherein the second oil injection passage has two ends, andwherein one end communicates with the second supercooler and the other end combines with the second injection passage. 10. An air conditioner comprising: a compressor for compressing and discharging a refrigerant;an oil separator for separating an oil from the refrigerant discharged from the compressor, wherein the separated oil is collected back in the compressor;a condenser for condensing the refrigerant remaining after oil separation by the oil separator; anda first supercooler in which heat is exchanged between a condensed refrigerant from the condenser and a first branch refrigerant branched from the condensed refrigerant;a second supercooler in which heat is exchanged between the condensed refrigerant passing through the first supercooler and a second branch refrigerant branched from the condensed refrigerant;an oil collection passage extending from the oil separator to a suction passage of the compressor to collect the separated oil in the compressor; andan oil injection passage extending from the oil collection passage to the second supercooler,wherein the oil injection passage comprises:a first oil injection passage extending from one position of the oil collection passage to the second supercooler; anda second oil injection passage connected to the first oil injection passage to discharge the oil that is heat-exchanged in the second supercooler. 11. The air conditioner according to claim 10, further comprising: a first injection passage for guiding a flow of the first branch refrigerant and in which a first injection expansion device is disposed; anda second injection passage for guiding a flow of the second branch refrigerant and in which a second injection expansion device is disposed. 12. The air conditioner according to claim 11, wherein the second injection passage further comprises: a combination part to which the second oil injection passage is connected; anda check valve disposed between the second injection expansion device and the branch part. 13. The air conditioner according to claim 10, further comprising an oil opening/closing valve disposed in the second oil injection passage to selectively restrict a flow of the oil to the second supercooler.
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이 특허에 인용된 특허 (2)
Holden Steven J. (Manlius NY) Schwoerer John A. (Boston MA), Back pressure control for improved system operative efficiency.
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