Refrigeration circuit and method for operating a refrigeration circuit
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-049/02
F25B-041/04
F25B-009/00
F25B-040/04
F25B-001/10
F25B-005/02
출원번호
US-0227550
(2011-09-08)
등록번호
US-8844303
(2014-09-30)
우선권정보
DE-10 2004 038 640 (2004-08-09)
발명자
/ 주소
Heinbokel, Bernd
Gernemann, Andreas
Schierhorn, Uwe
출원인 / 주소
Carrier Corporation
대리인 / 주소
Bachman & LaPointe, P.C.
인용정보
피인용 횟수 :
2인용 특허 :
16
초록▼
The invention relates to a refrigeration circuit having a mono- or multi-component refrigerant circulating therein, said refrigeration circuit comprising, in the direction of flow, a condenser, a collecting container, a relief device connected upstream of an evaporator, an evaporator and a compresso
The invention relates to a refrigeration circuit having a mono- or multi-component refrigerant circulating therein, said refrigeration circuit comprising, in the direction of flow, a condenser, a collecting container, a relief device connected upstream of an evaporator, an evaporator and a compressor unit with single-stage compression. According to the invention, there is an intermediate relief device (a) arranged between the condenser (1) and the collecting container (3). Furthermore, there is disclosed a method of operating a refrigeration device in which pressure relief of the refrigerant to an (intermediate) pressure of 5 to 40 bar is effected in the intermediate relief device (a) arranged between the condenser (1) and the collecting container (3).
대표청구항▼
1. Refrigeration circuit having a refrigerant circulating therein, said refrigeration circuit enabling a transcritical overcritical operation, said refrigeration circuit comprising, sequentially in the direction of flow: a condenser/gas cooler (1);an intermediate relief device (a), relieving downstr
1. Refrigeration circuit having a refrigerant circulating therein, said refrigeration circuit enabling a transcritical overcritical operation, said refrigeration circuit comprising, sequentially in the direction of flow: a condenser/gas cooler (1);an intermediate relief device (a), relieving downstream pressure to an intermediate pressure of 5-40 bar;a collecting container (3) having a gas space;a relief device (b, c, d);an evaporator (E2, E3); anda compressor unit (6) having an input connected to the evaporator (E2, E3) by a suction line (5), wherein: the gas space of the collecting container (3) is connected or connectible by a connection line (11, 12) to the input of the compressor unit (6), bypassing the evaporator (E2, E3);a relief valve (e) is in the connection line (11, 12) between the gas space of the collecting container (3) and the input of the compressor unit (6);the connection line (11, 12) joins a suction line (5) upstream of the compressor unit (6);a pressure line (7) is provided for leading compressed refrigerant from the compressor unit (6) to the condenser/gas cooler (1);a heat exchanger (E6) is provided in which a flash gas sucked off from the collecting container is superheated against compressed refrigerant in the pressure line (7); anda suction line (16) supplying a partial flow of said flash gas to the heat exchanger (E6) branches off from the connection line (11, 12). 2. The refrigeration circuit according to claim 1, wherein: the refrigerant comprises CO2. 3. Refrigeration circuit according to claim 1, wherein: a heat exchanger (E1) is connected upstream of the collecting container (3). 4. Refrigeration circuit according to claim 3, wherein: the heat exchanger (E1) is connected or connectible (2, 13) on an input side of the heat exchanger to the output of the condenser/gas cooler (1). 5. Refrigeration circuit according to claim 3, wherein: a line (2) from the condenser/gas cooler (1) divides into a first line portion (2′) and a second line portion (13);a relief device (f) is in the second line portion (13, 14); andthe refrigerant in the second line portion (13, 14) is evaporated in the heat exchanger (E1) against the refrigerant in the first line portion (2′). 6. Refrigeration circuit according to claim 5, wherein: the second line portion (13, 14) after the heat exchanger (E1) is connected or connectible to the input of the compressor (6′) of the compressor unit (6). 7. Refrigeration circuit according to claim 5, wherein: the pressure line (7) is connected or connectible with a line (2, 2′, 2″) that connects the condenser/gas cooler (1) and the collecting container (3). 8. Refrigeration circuit according to claim 5, wherein: a line (18) having a valve (j) arranged therein connects the first line portion (2″) downstream of the heat exchanger (E1) with the pressure line (7) downstream of the compressor unit (6). 9. Refrigeration circuit according to claim 1, wherein: the pressure line (7) is connected or connectible to the collecting container (3), preferably with the gas space thereof. 10. Refrigeration circuit according to claim 9, wherein: a relief valve (h) is provided in a line (17) that connects the pressure line (7) with the collecting container (3). 11. Refrigeration circuit according to claim 1, wherein: the flash gas after passage through the heat exchanger/superheater (E6) is led through a line (16′) to the input of the compressor (6′) of the compressor unit (6). 12. Refrigeration circuit according to claim 1, wherein: there is a heat exchanger/a subcooler (E5) between the collecting container (3) and the relief device (c, b, d) connected upstream of the evaporator. 13. Refrigeration circuit according to claim 12, wherein: the heat exchanger/subcooler (E5) is connected or connectible (12) with an input side of the heat exchanger/subcooler to the gas space of the collecting container (3). 14. Refrigeration circuit according to claim 12, wherein: the liquid refrigerant in the heat exchanger/subcooler (E5) is subcooled against the flash gas from the collecting container (3) that has been expanded by the valve (e). 15. Refrigeration circuit according to claim 1, wherein: the refrigerant sucked off from the collecting container (3) is led via a line (8) to one or more freezing cold consumers (E4) having the relief device (d) connected upstream thereof. 16. Refrigeration circuit according to claim 15, wherein: a second compressor unit (10) is provided that is supplied via a suction line (9) with refrigerant evaporated in the freezing cold consumer (E4); andthe refrigerant compressed in the compressor unit (10) is led to the compressor unit (6) via a suction line (11). 17. A method for supercritical operation of a refrigeration circuit according to claim 1, wherein: pressure relief of the refrigerant to an intermediate pressure of 5 to 40 bar is effected in the intermediate pressure relief device (a) arranged between the condenser/gas cooler (1) and the collecting container (3);the intermediate pressure is kept constant by means of the relief valve (e) in the connection line (11, 12) that connects the gas space of the collecting container (3) to the input of the compressor unit (6) and joins into the suction line (5) at a position upstream of the compressor unit (6); andat least the partial flow of the flash gas (12) withdrawn from the collecting container (3) is superheated (E6) at least temporarily by heat exchange from the compressed refrigerant (7) flowing from the compressor unit (6) to the condenser/gas cooler (1). 18. Method according to claim 17, wherein: the refrigerant (2) is subjected to cooling (E1) prior to the pressure relief in the intermediate pressure-relief device (a). 19. Method according to claim 18, wherein: cooling (E1) of the refrigerant (2) is effected with respect to a partial flow of the refrigerant (13). 20. Method according to claim 18, wherein: the refrigerant (4) withdrawn from the collecting container (3) is subjected to sub-cooling (E5). 21. Method according to claim 20, wherein: sub-cooling (E5) of the refrigerant (4) withdrawn from the collecting container (3) is effected with respect to the flash gas (12) withdrawn from the collecting container (3). 22. Method according to claim 17, wherein: the intermediate pressure is regulated to a constant value and/or to a constant difference from the suction pressure by means of at least one valve (e, h, j). 23. A method for operating the circuit of claim 1 comprising: operating the compressor to circulate a flow of the refrigerant sequentially in the direction of flow through: the condenser/gas cooler (1);the intermediate relief device (a);the collecting container (3);the relief device (b, c);the evaporator (E2, E3); andreturning to the compressor.
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이 특허에 인용된 특허 (16)
Hyde Robert E. (2229 SE. 170th Portland OR 97233), Apparatus for maximizing refrigeration capacity.
Ares Roland A. (St. Charles MO) Cromer James M. (Florissant MO) Schaeffer Wayne G. (Creve Coeur MO) Wehmeier William C. (St. Charles MO), Flow-through surge receiver.
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