Refrigeration circuit and method for operating a refrigeration circuit
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-0499852
(2014-09-29)
등록번호
US-9494345
(2016-11-15)
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);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: a further compressor unit (10) as well as at least one freezing consumer (E4) having a relief valve (d) connected upstream of it are provided;in operation, refrigerant is sucked off from the collecting container (3) and led, via the suction line (4), to the relief device (b, c), expanded therein, led to the evaporator (E2, E3), evaporated therein, and led to the compressor unit (6) via a suction line (5);in operation, a refrigerant partial flow withdrawn from the collecting container (3) is led via the suction line (4) and a line (8) branching off the suction line (4) to the relief valve (d), expanded therein, led to the freezing consumer (E4), evaporated therein, and led to the further compressor unit (10) via a line (9);in operation, the refrigerant partial flow is compressed by the further compressor unit (10) to the input pressure of the compressor unit (6) and led to the input side of the compressor unit (6) via a suction line (11, 5);the gas space of the collecting container (3) is connected or connectible to the input of the compressor unit (6); anda 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). 2. The refrigeration circuit of claim 1, wherein the line (11) from the further compressor unit (10) joins the suction line (5) at a position before the compressor unit (6). 3. The refrigeration circuit of claim 1, wherein the intermediate relief device (a) is configured to relieve the downstream pressure to an intermediate pressure of 5-40 bar. 4. The refrigeration circuit of claim 1, wherein the second compressor unit (10) is supplied via the suction line (9) with refrigerant evaporated in the freezing cold consumer (E4). 5. The refrigeration circuit of claim 1, wherein the line (11, 12) connecting the gas space of the collecting container (3) to the input of the compressor unit (6) bypasses the evaporator (E2, E3). 6. The refrigeration circuit according to claim 1, wherein the refrigerant comprises CO2. 7. The refrigeration circuit according to claim 1, wherein a heat exchanger (E1) is connected upstream of the collecting container (3). 8. The refrigeration circuit according to claim 7, wherein the heat exchanger (E1) is connected or connectible (2, 13) with its input side to the output of the condenser/gas cooler (1). 9. The refrigeration circuit according to claim 7, wherein: the 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); andthe refrigerant in the second line portion (13) is evaporated in the heat exchanger (E1) against the refrigerant in the first line portion (2′). 10. The refrigeration circuit according to claim 9, 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). 11. The refrigeration circuit according to claim 9, wherein: a pressure line (7) is provided for leading compressed refrigerant from the compressor unit (6) to the compressor/gas cooler (1); andthe pressure line (7) is connected or connectible with the line (2, 2′, 2″) that connects the condenser/gas cooler (1) and the collecting container (3). 12. The refrigeration circuit according to claim 9, wherein: a pressure line (7) is provided for leading compressed refrigerant from the compressor unit (6) to the condenser/gas cooler (1); anda 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). 13. The refrigeration circuit according to claim 1, wherein: a pressure line (7) is provided for leading compressed refrigerant from the compressor unit (6) to the condenser/gas cooler (1); andthe pressure line (7) is connected or connectible to the collecting container (3), preferably with the gas space thereof. 14. The refrigeration circuit according to claim 13, wherein a relief valve (h) is provided in a line (17) that connects the pressure line (7) with the collecting container (3). 15. The 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) connected upstream of the evaporator. 16. The refrigeration circuit according to claim 1, wherein: there is a heat exchanger (E6) in which the flash gas sucked off from the connecting container (3) is superheated against compressed refrigerant in the pressure line (7). 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);refrigerant is sucked off from the collecting container (3), expanded in the relief device (b, c) connected upstream of the evaporator (E2, E3), evaporated in the evaporator (E2, E3) and lead to the compressor unit (6) via a suction line (5);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);the 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); andthe intermediate pressure is regulated to a constant value by means of a relief valve (e) provided in the connection line (11, 12) between the gas space of the collecting container (3) and the input of the compressor unit (6). 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 the refrigerant (4) withdrawn from the collecting container (3) is subjected to subcooling (E5). 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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