Refrigeration circuit and method for operating a refrigeration circuit
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-009/00
F25B-041/04
F25B-001/00
F25B-001/10
F25B-005/02
F25B-040/04
F25B-049/02
출원번호
US-0499826
(2014-09-29)
등록번호
US-9476614
(2016-10-25)
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 :
0인용 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 arranged between the condenser and the collecting container. 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 arranged between the condenser and the collecting container.
대표청구항▼
1. A refrigeration circuit having a refrigerant, especially CO2, 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)
1. A refrigeration circuit having a refrigerant, especially CO2, 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);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 to the input of the compressor unit (6);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);a heat exchanger/subcooler (E5) is between the collecting container (3) and the relief device (b, c); andin operation the refrigerant drawn off the collecting container (3) is subcooled in the heat exchanger/subcooler (E5) with respect to the flash gas being drawn off the collecting container (3) via the connection line (11, 12) and is expanded by the expansion valve (e). 2. The refrigeration circuit according to claim 1, wherein the heat exchanger/subcooler (E5) is connected or connectible (12) with its input side to the gas space of the collecting container (3). 3. The refrigeration circuit according to claim 1, 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). 4. The refrigeration circuit according to claim 1, wherein a heat transfer means (E1) is connected upstream of the collecting container (3). 5. The refrigeration circuit according to claim 4, wherein the heat transfer means (E1) is connected or connectible (2, 13) on the input side to the output of the condenser/gascooler (1). 6. The refrigeration circuit according to claim 4, wherein the line (2) from the condenser/gascooler (1) divides into a first line portion (2′) and into a second line portion (13), wherein a relief device (f) is in the second line portion (13), and wherein the refrigerant in the second line portion (13) is evaporated in the heat exchanger (E1) with respect to the refrigerant in the first line portion (2′). 7. The refrigeration circuit according to claim 6, 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). 8. The refrigeration circuit according to claim 6, wherein a pressure line (7) is provided for feeding compressed refrigerant from the compressor unit (6) to the compressor/gascooler (1), and wherein the pressure line (7) is connected or connectible to the line (2, 2′, 2″) that connects the condenser/gascooler (1) and the collecting container (3). 9. The refrigeration circuit according to claim 6, wherein a pressure line (7) is provided for feeding compressed refrigerant from the compressor unit (6) to the condenser/gascooler (1), and wherein the line (18) having a valve (j) arranged therein connects the first line portion (2′) after the heat exchanger (E1) to the pressure line (7) after the compressor unit (6). 10. The refrigeration circuit according to claim 1, wherein the gas space of the collecting container (3) is connected or connectible to the input of a compressor (6′) of the compressor unit (6). 11. The refrigeration circuit according to claim 1, wherein a pressure line (7) is provided for feeding compressed refrigerant from the compressor unit (6) to the condenser/gascooler (1), and wherein the pressure line (7) is connected or connectible to the collecting container (3), preferably with the gas space thereof. 12. The refrigeration circuit according to claim 11, wherein a relief valve (h) is in the line (17) that connects the pressure line (7) to the collecting container (3). 13. The refrigeration circuit according to claim 1, wherein a pressure line (7) is provided for feeding compressed refrigerant from the compressor unit (6) to the condenser/gascooler (1) and wherein a heat exchanger (E6) is provided in which the flash gas drawn off the collecting container is superheated against compressed refrigerant in the pressure line (7). 14. The refrigeration circuit according to claim 13, wherein the flash gas after passage through the heat exchanger/superheater (E6) is fed via a line (16′) to the input of the compressor (6′) of the compressor unit (6). 15. The refrigeration circuit according to claim 1, wherein the refrigerant drawn off the collecting container (3) is fed via a line (8) to one or more freezing cold consumers (E4) having an expansion valve (d) connected upstream thereof. 16. The refrigeration circuit according to claim 15, wherein a compressor unit (10) is provided that is supplied via a suction line (9) with refrigerant evaporated in the freezing cold consumer (E4), and wherein the refrigerant compressed in the compressor unit (10) is fed to the compressor unit (6) via a suction line (11). 17. A method for overcritical operation of a refrigeration circuit according to claim 1, in which a refrigerant, especially CO2, circulates, wherein: 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/gascooler (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); andthe refrigerant drawn off the collecting container (3) is subcooled in a heat exchanger/subcooler (E5) with respect to the flash gas being drawn off the collecting container (3) via the connection line (11, 12) and being expanded in the relief valve (e). 18. The 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. The 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). 20. The method according to claim 17, wherein: a refrigerant partial flow is sucked off from the collecting container (3) via the suction line (4) and a line (8) branching off the suction line (4) to the at least one freezing consumer (E4);the refrigerant partial flow is expanded in the relief valve (d), evaporated in the at least one freezing consumer (E4), and led to the further compressor unit (10); andthe further compressor unit (10) compresses the refrigerant partial flow to the input pressure of the compressor unit (6) and leads it via a line (11, 5) to the input side of the compressor unit (6). 21. The method according to claim 17, wherein the flash gas sucked off from the connecting container (3) is superheated (E6) against compressed refrigerant in the pressure line (7). 22. The method according to claim 17, 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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