IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0732565
(2003-12-10)
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발명자
/ 주소 |
- Taras, Michael F.
- Lifson, Alexander
- Fraser, Jr., Howard H.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
4 인용 특허 :
7 |
초록
▼
The invention provides two distinct schematics allowing system performance enhancement through the utilization of an auxiliary heat exchanger and splitting the refrigerant flow into primary and secondary paths. A system performance boost is achieved due to extra subcooling of a primary refrigerant f
The invention provides two distinct schematics allowing system performance enhancement through the utilization of an auxiliary heat exchanger and splitting the refrigerant flow into primary and secondary paths. A system performance boost is achieved due to extra subcooling of a primary refrigerant flow in an auxiliary heat exchanger as well as superheat reduction of the combined refrigerant flow entering the compressor and a primary refrigerant flow pressure drop decrease through the evaporator (in comparison to the prior art). The invention offers the superior benefits outlined above with only a moderate cost increment. Also, employment of conventional components only, and no compressor modifications make implementation of the proposed schematics even more attractive.
대표청구항
▼
1. A refrigerant circuit comprising:a compressor having a discharge line leading to a condenser, said condenser having a discharge line leading to an auxiliary heat exchanger, a refrigerant flowing through said auxiliary heat exchanger passing to a main expansion device, and then to an evaporator, a
1. A refrigerant circuit comprising:a compressor having a discharge line leading to a condenser, said condenser having a discharge line leading to an auxiliary heat exchanger, a refrigerant flowing through said auxiliary heat exchanger passing to a main expansion device, and then to an evaporator, and then from said evaporator returning refrigerant to a suction line leading to said compressor; andrefrigerant downstream of said condenser being split into a main flow path and a secondary flow path, said secondary flow path bypassing said main expansion device and said evaporator, and being recombined with said main flow path downstream of said evaporator to be returned to said suction line leading to said compressor. 2. A refrigerant circuit as set forth in claim 1, wherein said secondary flow path passes through a secondary expansion device before being recombined. 3. A refrigerant circuit as set forth in claim 1, wherein said main flow path and said secondary flow path branch away from each other downstream of said auxiliary heat exchanger, and upstream of said main expansion device. 4. A refrigerant circuit as set forth in claim 1, wherein said main flow path and said secondary flow path branch away from each other downstream of said condenser, and upstream of said auxiliary heat exchanger, said main flow path and said secondary flow path both passing through said auxiliary heat exchanger. 5. A refrigerant circuit as set forth in claim 4, wherein said secondary flow path passes through an expansion device upstream of said auxiliary heat exchanger. 6. A refrigerant circuit comprising:a compressor having a discharge line leading to a condenser, said condenser having a discharge line leading to an auxiliary heat exchanger, a refrigerant flowing through said auxiliary heat exchanger passing to a main expansion device, and then to an evaporator, and then from said evaporator returning refrigerant to a suction line leading to said compressor; andrefrigerant downstream of said condenser being split into a main flow path and a secondary flow path downstream of said auxiliary heat exchanger, and upstream of said main expansion device or said evaporator, and being recombined with said main flow path downstream of said evaporator to be returned to said compressor suction line. 7. A refrigerant circuit comprising:a compressor having a discharge line leading to a condenser, said condenser having a discharge line leading to an auxiliary heat exchanger, a refrigerant flowing through said auxiliary heat exchanger passing to a main expansion device, and then to an evaporator, and then from said evaporator returning refrigerant to a suction line leading to said compressor; andrefrigerant downstream of said condenser being split into a main flow path and a secondary flow path downstream of said compressor and upstream of said auxiliary heat exchanger, and both said main flow path and said secondary flow path passing through said auxiliary heat exchanger, and being recombined with said main flow path downstream of said evaporator to return to said compressor suction line. 8. A refrigerant circuit as set forth in claim 7, wherein said secondary flow path passes though a secondary expansion device upstream of said auxiliary heat exchanger. 9. A method of increasing performance in a refrigerant circuit comprising the steps of:(1) providing a compressor having a discharge line leading to a condenser, the condenser having a line leading to an auxiliary heat exchanger, and a refrigerant flowing through said auxiliary heat exchanger passing to a main expansion device, then to an evaporator, and then from said evaporator returning refrigerant to a suction line leading to said compressor; and(2) splitting refrigerant downstream of condenser into a main flow path and a secondary flow path, both said main flow path and said secondary flow path passing through said auxiliary heat exchanger, said secondary flow path bypassing said main expansion device and said evaporator, and passing the refrigerant in said secondary flow path through a secondary expansion device, said secondary flow path being recombined with said main flow path downstream of said evaporator, to be returned to said suction line leading to said compressor. 10. A method of increasing performance in a refrigerant circuit comprising the steps of:(1) providing a compressor having a discharge line leading to a condenser, the condenser having a line leading to an auxiliary heat exchanger, and a refrigerant flowing through said auxiliary heat exchange passing to a main expansion device, then to an evaporator, and then from said evaporator returning refrigerant to a suction line leading to said compressor;(2) splitting refrigerant downstream of condenser into a main flow path and a secondary flow path, said secondary flow path bypassing said main expansion device and said evaporator, and passing the refrigerant in said secondary flow path through a secondary expansion device, said secondary flow path being recombined with said main flow path downstream of said evaporator, to be returned to said suction line leading to said compressor; and(3) said splitting of said refrigerant into said main flow path and said secondary flow path occurs downstream of said auxiliary heat exchanger, and said secondary expansion device is positioned downstream of said auxiliary heat exchanger. 11. A method of increasing performance in a refrigerant circuit comprising the steps of:(1) providing a compressor having a discharge line leading to a condenser, the condenser having a line leading to an auxiliary heat exchanger, and a refrigerant flowing through said auxiliary heat exchanger passing to a main expansion device, then to an evaporator, and then from said evaporator returning refrigerant to a suction line leading to said compressor;(2) splitting refrigerant downstream of condenser into a main flow path and a secondary flow path, said secondary flow path bypassing said main expansion device and said evaporator, and passing the refrigerant in said secondary flow path through a secondary expansion device, said secondary flow path being recombined with said main flow path downstream of said evaporator, to be returned to said suction line leading to said compressor; and(3) said splitting of said refrigerant into said main flow path and said secondary flow path occurs upstream of said auxiliary heat exchanger, and said expansion by said secondary expansion device also occurring upstream of said auxiliary heat exchanger.
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