Vapor compression system with bypass/economizer circuits
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-001/00
F25B-041/00
F25B-049/00
출원번호
US-0419509
(2003-04-21)
발명자
/ 주소
Lifson, Alexander
Taras, Michael F.
출원인 / 주소
Carrier Corporation
대리인 / 주소
Bachman &
인용정보
피인용 횟수 :
7인용 특허 :
8
초록▼
A vapor compression system includes a main circuit comprising a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, the compressor having a suction port, a discharge port and an intermediate pressure port; an economizer circuit having an auxil
A vapor compression system includes a main circuit comprising a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, the compressor having a suction port, a discharge port and an intermediate pressure port; an economizer circuit having an auxiliary expansion device and economizer refrigerant lines connected between said condenser and at least one of said intermediate pressure port and said suction port of said compressor; a bypass circuit having bypass refrigerant lines connected between the intermediate pressure port and the suction port; and a heat exchanger adapted to receive a first flow from the main refrigerant lines and a second flow from at least one of the economizer circuit and the bypass circuit, the first flow and the second flow being positioned for heat transfer relationship within the heat exchanger, wherein the system is selectively operable in a first mode wherein the economizer circuit is active and the bypass circuit is inactive, and a second mode wherein the bypass circuit is active and the economizer circuit is inactive, and wherein the heat exchanger is active for cooling the first flow in both the first mode and the second mode. Further, another system configuration is offered which allows multiple additional important modes of operation as well as enhanced efficiency and reliability and operational envelope expansion through selective valving arrangements.
대표청구항▼
1. A vapor compression system, comprising:a main circuit comprising a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, said compressor having a suction port, a discharge port and an intermediate pressure port; an economizer circuit comprisi
1. A vapor compression system, comprising:a main circuit comprising a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, said compressor having a suction port, a discharge port and an intermediate pressure port; an economizer circuit comprising an auxiliary expansion device and economizer refrigerant lines connected between said condenser and at least one of said intermediate pressure port and said suction port of said compressor; a bypass circuit comprising bypass refrigerant lines connected between said intermediate pressure port and said suction port; and a heat exchanger adapted to receive a first flow from said main refrigerant lines and a second flow selectively from said economizer circuit and said bypass circuit, said first flow and said second flow being positioned for heat transfer relationship within said heat exchanger, wherein said system is selectively operable in a first mode wherein said economizer circuit is active and flows through said heat exchanger and said bypass circuit is inactive, and a second mode wherein said bypass circuit is active and flows through said heat exchanger and said economizer circuit is inactive, and wherein said heat exchanger is active for cooling said first flow in both said first mode and said second mode. 2. The system of claim 1, further comprising a bypass shutoff valve positioned along said bypass refrigerant lines for selectively allowing and blocking flow through said bypass circuit and an economizer shutoff valve for selectively allowing and blocking flow through said economizer circuit, whereby said system is selectively operable in said first mode and said second mode.3. The system of claim 2, further comprising a control member operatively associated with said bypass shutoff valve and said economizer shutoff valve for selectively opening and closing said bypass shutoff valve and said economizer shutoff valve.4. The system of claim 1, further comprising means for selectively controlling flow through said economizer circuit and said bypass circuit whereby said system can be operated in said first mode, said second mode wherein flows in said heat exchanger are substantially co-current, a third mode wherein said economizer circuit and said bypass circuit are substantially inactive, and at least one additional mode selected from the group consisting of a fourth mode wherein said economizer circuit and said bypass circuit are both active, and said second flow comprises flow from both of said economizer circuit and said bypass circuit, a fifth mode wherein said economizer circuit and said bypass circuit are both active, and said second flow comprises flow only from said economizer circuit, a sixth mode wherein said economizer circuit and said bypass circuit are both active, and said second flow comprises flow only from said bypass circuit, a seventh mode wherein said economizer circuit and said bypass circuit are both active, bypass said heat exchanger, and flow to said suction port of said compressor, an eighth mode wherein said economizer circuit is inactive and said bypass circuit is active, wherein said bypass circuit bypasses said heat exchanger and flows to said suction port of said compressor, and a ninth mode wherein said economizer circuit is inactive and said bypass circuit is active, wherein said second flow comprises flow from said bypass circuit, and wherein flow in said heat exchanger is substantially counter-circuit.5. The system of claim 4, wherein said means for selectively controlling is adapted to allow operation of said system in each of said first mode, said second mode, said third mode, said fourth mode, said fifth mode, said sixth mode, said seventh mode, said eighth mode and said ninth mode.6. A method for operating a vapor compression system comprising a main vapor compression circuit having a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, said compressor having a suction port, a discharge port and an intermediate pressure port; an economizer circuit having an auxiliary expansion device and economizer refrigerant lines connected between said condenser and at least one of said intermediate pressure port and said suction port of said compressor; a bypass circuit having bypass refrigerant lines connected between said intermediate pressure port and said suction port; and a heat exchanger adapted to receive a first flow from said main refrigerant lines and a second flow selectively from said economizer circuit and said bypass circuit, said first flow and said second flow being positioned in heat transfer relationship within said heat exchanger, comprising selectively operating said system in a first mode wherein said economizer circuit is active and flows through said heat exchanger and said bypass circuit is inactive, and a second mode wherein said bypass circuit is active and flows through said heat exchanger and said economizer circuit is inactive, and wherein said heat exchanger is active for cooling flow in said main refrigerant lines in both said first mode and said second mode.7. A method for operating a vapor compression system comprising a main vapor compression circuit having a compressor, a condenser, an expansion device and an evaporator serially connected by main refrigerant lines, said compressor having a suction port, a discharge port and an intermediate pressure port; an economizer circuit having an auxiliary expansion device and economizer refrigerant lines connected between said condenser and at least one of said intermediate pressure port and said suction port of said compressor; a bypass circuit having bypass refrigerant lines connected between said intermediate pressure port and said suction port.; and a heat exchanger adapted to receive a first flow from said main refrigerant lines and a second flow selectively from said economizer circuit and said bypass circuit, said first flow and said second flow being positioned in heat transfer relationship within said heat exchanger, comprising selectively operating said system in at least three different modes selected from the group consisting of a first mode wherein said economizer circuit is active and flows through said heat exchanger and said bypass circuit is inactive, a second mode wherein said bypass circuit is active and flows through said heat exchanger and said economizer circuit is inactive and flows in said heat exchanger are substantially co-current, a third mode wherein said economizer circuit and said bypass circuit are substantially inactive, a fourth mode wherein said economizer circuit and said bypass circuit are both active, and said second flow comprises flow from both of said economizer circuit and said bypass circuit, a fifth mode wherein said economizer circuit and said bypass circuit are both active, and said second flow comprises flow only from said economizer circuit, a sixth mode wherein said economizer circuit and said bypass circuit are both active, and said second flow comprises flow only from said bypass circuit, a seventh mode wherein said economizer circuit and said bypass circuit are both active, bypass said heat exchanger, and flow to said suction port of said compressor, an eighth mode wherein said economizer circuit is inactive and said bypass circuit is active, wherein said bypass circuit bypasses said heat exchanger and flows to said suction port of said compressor, and a ninth mode wherein said economizer circuit is inactive and said bypass circuit is active, wherein said second flow comprises flow from said bypass circuit, and wherein flow in said heat exchanger is substantially counter-circuit.8. The method of claim 7, wherein said at least three different modes include at least one of said fourth mode, said sixth mode and said seventh mode whereby a controlled flooding condition can be created at said suction port of said compressor.
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이 특허에 인용된 특허 (8)
Heinrichs Anton D. (Ransomville NY) Narreau Peter P. (Pennellville NY), Economizer control for two-stage compressor systems.
Lifson Alexander ; Karpman Boris, Method of optimizing cooling capacity, energy efficiency and reliability of a refrigeration system during temperature pull down.
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