IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0300171
(2005-12-14)
|
등록번호 |
US-7334430
(2008-02-26)
|
우선권정보 |
JP-2004-372956(2004-12-24) |
발명자
/ 주소 |
- Kakehashi,Nobuharu
- Ohta,Hiromi
|
출원인 / 주소 |
|
대리인 / 주소 |
Harness, Dickey & Pierce, PLC
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
3 |
초록
▼
A plurality of evaporators 5, 11 for evaporating an refrigerant at low pressure, which has passed through pressure reducing means 4, 10, are provided, an accumulator 9 is provided on the outlet side of one evaporator 5, an internal heat exchanger 3 is provided on the outlet side of the accumulator 9
A plurality of evaporators 5, 11 for evaporating an refrigerant at low pressure, which has passed through pressure reducing means 4, 10, are provided, an accumulator 9 is provided on the outlet side of one evaporator 5, an internal heat exchanger 3 is provided on the outlet side of the accumulator 9, the outlet side of another evaporator 11 is joined to a portion between the outlet side of the accumulator 9 and the inlet side of the internal heat exchanger 3, and the pressure reducing means 10 at the evaporator 11 side is composed of a fixed throttle.
대표청구항
▼
The invention claimed is: 1. A refrigerating cycle comprising: a compressor (1) for sucking and compressing a refrigerant; a radiator (2) for cooling the refrigerant discharged from the compressor (1); at least one pressure reducing means (4, 10) for reducing pressure of the refrigerant at the outl
The invention claimed is: 1. A refrigerating cycle comprising: a compressor (1) for sucking and compressing a refrigerant; a radiator (2) for cooling the refrigerant discharged from the compressor (1); at least one pressure reducing means (4, 10) for reducing pressure of the refrigerant at the outlet side of the radiator (2); a plurality of evaporators (5, 11) for evaporating the low pressure refrigerant which has passed through the pressure reducing means (4, 10); an accumulator (9) provided on the outlet side of one evaporator (5) in the plurality of evaporators (5, 11); and an internal heat exchanger (3) for exchanging heat between the low pressure refrigerant, which flows between the outlet side of the accumulator (9) and the suction side of the compressor (1), and the high pressure refrigerant at the outlet side of the radiator (2), wherein the outlet side of the other evaporator (11) in the plurality of evaporators (5, 11) is joined to a portion between the outlet side of the accumulator (9) and the inlet side of the internal heat exchanger (3), and at least one pressure reducing means reduces the pressure of the refrigerant, which is supplied at least to the other evaporator (11), by a fixed throttle (4, 10). 2. A refrigerating cycle according to claim 1, wherein only one fixed throttle is provided, and pressure of the refrigerant supplied to the plurality of evaporators (5, 11) is reduced by the one fixed throttle. 3. A refrigerating cycle according to claim 1, the at least one pressure reducing means including: a pressure reducing means (4), for reducing the pressure of the refrigerant supplied to one evaporator (5); and a fixed throttle (10), for reducing the pressure of the refrigerant supplied to the other evaporator (11), wherein the pressure reducing means (4) and the fixed throttle (10) are provided independently of each other. 4. A refrigerating cycle comprising: a compressor (1) for sucking and compressing a refrigerant; a radiator (2) for cooling the refrigerant discharged from the compressor (1); at least one pressure reducing means (4, 10) for reducing pressure of the refrigerant at the outlet side of the radiator (2); a plurality of evaporators (5, 11) for evaporating the low pressure refrigerant which has passed through the pressure reducing means (4, 10); an accumulator (9) provided on the outlet side of one evaporator (5) in the plurality of evaporators (5, 11); and an internal heat exchanger (3) for exchanging heat between the low pressure refrigerant, which flows between the outlet side of the accumulator (9) and the suction side of the compressor (1), and the high pressure refrigerant at the outlet side of the radiator (2), wherein the outlet side of the other evaporator (11) in the plurality of evaporators (5, 11) is joined to a portion between the outlet side of the accumulator (9) and the inlet side of the internal heat exchanger (3), at least one pressure reducing means reduces the pressure of the refrigerant, which is supplied at least to the other evaporator (11), by a variable throttle (10), and the variable throttle (10) is changed so that the degree of opening can be reduced when the high pressure is lowered. 5. A refrigerating cycle according to claim 4, wherein the variable throttle (10) is one of a differential pressure valve, the degree of opening of which is changed according to the differential pressure between the high pressure and the low pressure, a high-pressure responding valve, the degree of valve opening of which is changed according to the high pressure, and a high pressure refrigerant temperature responding valve, the degree of valve opening of which is changed according to the high pressure refrigerant temperature. 6. A refrigerating cycle according to claim 4, at least one pressure reducing means including: a pressure reducing means (4) for reducing the pressure of the refrigerant supplied to one evaporator (5); and a variable throttle (10) for reducing pressure of the refrigerant supplied to the other evaporator (11), wherein the pressure reducing means (4) and the variable throttle (10) are provided independently of each other. 7. A refrigerating cycle according to claim 3, wherein the pressure reducing means (4) at one evaporator (5) side controls the high pressure according to the high pressure refrigerant temperature at the outlet side of the radiator (2). 8. A refrigerating cycle comprising: a compressor (1) for sucking and compressing a refrigerant; a radiator (2) for cooling the refrigerant discharged from the compressor (1); one pressure reducing means (4, 10) for reducing pressure of the refrigerant at the outlet side of the radiator (2); a plurality of evaporators (5, 11) for evaporating the low pressure refrigerant which has passed through the pressure reducing means (4, 10); an accumulator (9) provided on the outlet side of one evaporator (5) in the plurality of evaporators (5, 11); and an internal heat exchanger (3) for exchanging heat between the low pressure refrigerant, which flows between the outlet side of the accumulator (9) and the suction side of the compressor (1), and the high pressure refrigerant at the outlet side of the radiator (2), wherein the outlet side of the other evaporator (11) in the plurality of evaporators (5, 11) is joined to a portion between the outlet side of the accumulator (9) and the inlet side of the internal heat exchanger (3), and one pressure reducing means controls the high pressure according to the high pressure refrigerant temperature at the outlet side of the radiator (2). 9. A refrigerating cycle comprising: a compressor (1) for sucking and compressing a refrigerant; a radiator (2) for cooling the refrigerant discharged from the compressor (1); at least one pressure reducing means (4, 10) for reducing the pressure of the refrigerant at the outlet side of the radiator (2); a plurality of evaporators (5, 11) for evaporating the low pressure refrigerant which has passed through the pressure reducing means (4, 10); an accumulator (9) provided between the outlet side of the plurality of evaporators (5, 11) and the suction side of the compressor (1), and a refrigerant passage through which the refrigerant flowing out from at least one of the plurality of evaporators (5, 11) is introduced onto the inlet side of the other evaporator. 10. A refrigerating cycle according to claim 9, wherein the pressure reducing means is composed of one pressure reducing means (4) for reducing the pressure of the refrigerant flowing into the plurality of evaporators (5, 11). 11. A refrigerating cycle according to claim 9, wherein a plurality of pressure reducing means (4, 10) are provided corresponding to the plurality of evaporators (5, 11). 12. A refrigerating cycle according to claim 11, wherein one pressure reducing means (4) in the plurality of pressure reducing means controls the high pressure according to the high pressure refrigerant temperature at the outlet side of the radiator (2). 13. A refrigerating cycle according to claim 12, wherein the other pressure reducing means (10), which is one of the plurality of pressure reducing means is composed of a fixed throttle. 14. A refrigerating cycle according to claim 12, wherein the other pressure reducing means in the plurality of pressure reducing means is composed of a variable throttle (10), and the degree of opening of the variable throttle (10) is reduced when the high pressure is lowered. 15. A refrigerating cycle according to claim 11, wherein at least one of the plurality of pressure reducing means (4, 10) is composed of a fixed throttle (10). 16. A refrigerating cycle according to claim 11, wherein at least one of the plurality of pressure reducing means (4, 10) is composed of a variable throttle (10), and the degree of opening of the variable throttle is reduced when the high pressure is lowered. 17. A refrigerating cycle according to claim 14, wherein the variable throttle (10) is one of a differential pressure valve, the degree of opening of which is changed according to the differential pressure between the high pressure and the low pressure, a high-pressure responding valve, the degree of valve opening of which is changed according to the high pressure, and a high pressure refrigerant temperature responding valve, the degree of valve opening of which is changed according to the high pressure refrigerant temperature. 18. A refrigerating cycle according to claim 9, further comprising an internal heat exchanger (3) for exchanging heat between the low pressure refrigerant, which flows between the outlet side of the accumulator (9) and the suction side of the compressor (1), and the high pressure refrigerant at the outlet side of the radiator (2). 19. A refrigerating cycle according to claim 1, further comprising an opening and closing valve (16) for stopping a flow of the refrigerant to at least one evaporator in the plurality of evaporators (5, 11). 20. A refrigerating cycle according to claim 1, further comprising a changeover valve (17) for changing over a flow of the refrigerant to the plurality of evaporators (5, 11). 21. A refrigerating cycle according to claim 1, wherein the refrigerating cycle is a supercritical refrigerating cycle using a refrigerant, the pressure of which is not less than the critical pressure. 22. An air conditioner for vehicle use comprising the refrigerating cycle described in claim 1, wherein one evaporator (5) in the plurality of evaporators (5, 11) is arranged in the air conditioning unit (6) at the front seat side in the vehicle passenger compartment, and the other evaporator (11) in the plurality of evaporators (5, 11) is arranged in the air conditioning unit (12) at the rear seat side in the vehicle passenger compartment.
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