HRP20161607T1 - A multi-evaporator refrigeration circuit - Google Patents

A multi-evaporator refrigeration circuit Download PDF

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Publication number
HRP20161607T1
HRP20161607T1 HRP20161607TT HRP20161607T HRP20161607T1 HR P20161607 T1 HRP20161607 T1 HR P20161607T1 HR P20161607T T HRP20161607T T HR P20161607TT HR P20161607 T HRP20161607 T HR P20161607T HR P20161607 T1 HRP20161607 T1 HR P20161607T1
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HR
Croatia
Prior art keywords
liquid
suction
vapor separator
receiver
evaporators
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Application number
HRP20161607TT
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Croatian (hr)
Inventor
Sergio Girotto
Original Assignee
Huurre Group Oy
Enex S.R.L.
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Publication date
Priority claimed from IT000077A external-priority patent/ITTV20110077A1/en
Priority claimed from IT000141A external-priority patent/ITTV20110141A1/en
Priority claimed from IT000010A external-priority patent/ITTV20120010A1/en
Application filed by Huurre Group Oy, Enex S.R.L. filed Critical Huurre Group Oy
Publication of HRP20161607T1 publication Critical patent/HRP20161607T1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/001—Ejectors not being used as compression device
    • F25B2341/0012—Ejectors with the cooled primary flow at high pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/23—Separators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2509—Economiser valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2521—On-off valves controlled by pulse signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/04—Refrigerant level
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Air Conditioning Control Device (AREA)

Claims (14)

1. Rashladni krug s više isparivača prilagođen za uporabu ugljičnog dioksida kao tekućeg rashladnog sredstva, koji se sastoji od barem: - kompresora (1), - kondenzatora/plinskog hladnjaka (2), - ventila za regulaciju visokog tlaka (4), - separatora tekućine/pare (5), - ventila (9) za kontrolu tlaka u separatoru tekućine/pare (5), - uređaja za očitovanje razine tekućine (22, 23), - dva ili više isparivača (7, 18), i - usisnog prijemnika (8), pri čemu je rashladni krug prilagođen tako što dva ili više isparivača (7) mogu primiti tekuće rashladno sredstvo iz navedenog separatora tekućine/pare (5) kroz prigušnicu (6), naznačen time da se rashladni krug nadalje sastoji od barem jednog ejektora (14) koji se sastoji od priključka za usisavanje (15), a koji je paralelan s ventilom za regulaciju visokog tlaka (4); i da je rashladni krug prilagođen da hladnu tekućinu vodi kroz usisni prijemnik (8) do priključka za usisavanje (15) barem jednog od navedenih ejektora (14), a koji se aktivira za izravno punjenje radi održavanja dovoljne razine tekućine u separatoru tekućine/pare (5), čak i ako je masa koja kruži kroz dva ili više isparivača (7) veća od mase koja je isparila, kroz otvor prvog kontrolnog ventila (10) u ravnini od usisnog prijemnika (8) do priključka za usisavanje (15) barem jednog ejektora (14), bazirano na najjačem signalu generirano uređajem za očitovanje razine tekućine (22), kadgod je razina tekućeg rashladnog sredstva u navedenom usisnom prijemniku (8) iznad postavljene najviše razine.1. A multi-evaporator refrigeration circuit adapted to use carbon dioxide as a liquid refrigerant, consisting of at least: - compressor (1), - condenser/gas cooler (2), - valve for high pressure regulation (4), - liquid/vapor separator (5), - valve (9) for pressure control in the liquid/vapor separator (5), - liquid level detection device (22, 23), - two or more evaporators (7, 18), i - suction receiver (8), wherein the cooling circuit is adapted so that two or more evaporators (7) can receive the liquid refrigerant from the specified liquid/vapor separator (5) through the throttle (6), characterized in that the cooling circuit further consists of at least one ejector (14) which consists of a suction port (15), which is parallel to the high pressure control valve (4); and that the cooling circuit is adapted to lead cold liquid through the suction receiver (8) to the suction port (15) of at least one of said ejectors (14), which is activated for direct charging to maintain a sufficient liquid level in the liquid/vapor separator ( 5), even if the mass circulating through two or more evaporators (7) is greater than the mass that has evaporated, through the opening of the first control valve (10) in the plane from the suction receiver (8) to the suction port (15) of at least one of the ejector (14), based on the strongest signal generated by the liquid level detection device (22), whenever the level of liquid refrigerant in said suction receiver (8) is above the set highest level. 2. Rashladni krug temeljem zahtjeva 1, naznačen time da se rashladni krug dalje sastoji od prvog izmjenjivača topline (3) koji ima barem primarni i sekundarni krug, pri čemu je jedan krug prvog izmjenjivača topline (3) prilagođen za cirkulaciju gravitacijom hladne tekućine iz usisnog prijemnika (8) da bi se zamijenila toplina visoko tlačnom tekućinom iz kondenzatora/plinskog hladnjaka (2) prilagođena za cirkuliranje u drugom krugu izmjenjivača topline (3).2. Cooling circuit according to claim 1, characterized in that the cooling circuit further consists of a first heat exchanger (3) which has at least a primary and a secondary circuit, wherein one circuit of the first heat exchanger (3) is adapted for gravity circulation of cold liquid from the suction receiver (8) to replace the heat with the high-pressure liquid from the condenser/gas cooler (2) adapted to circulate in the second circuit of the heat exchanger (3). 3. Rashladni krug temeljem zahtjeva 2, naznačen time da je barem jedan ejektor (14) instaliran u zaseban cjevovod između izlaza iz kondenzatora/plinskog hladnjaka (2) i separatora tekućine/pare (5), s time da je cjevovod paralelno povezan s cjevovodom koji povezuje izlaz iz kondenzatora/plinskog hladnjaka (2) kroz izmjenjivač topline (3) s ulaznim ventilom za regulaciju visokog tlaka (4).3. Refrigeration circuit according to claim 2, characterized in that at least one ejector (14) is installed in a separate pipeline between the outlet of the condenser/gas cooler (2) and the liquid/vapor separator (5), with the pipeline being connected in parallel with the pipeline which connects the outlet from the condenser/gas cooler (2) through the heat exchanger (3) to the inlet valve for high pressure regulation (4). 4. Rashladni krug temeljem zahtjeva 1, 2 ili 3, naznačen time da se još sastoji od barem jednog kompresora niske temperature (19) i drugog izmjenjivača topline (16), a da je rashladni krug nadalje konfiguriran tako da opskrbljuje dva ili više isparivača (18) imajući izlaz konfiguriran za ulaz u krug drugog izmjenjivača topline (16) izmjenjujući toplinu s glavnim vodom tekućine koji izlazi iz separatora tekućine/pare (5) cirkulirajući na drugoj strani tog izmjenjivača topline (16).4. Refrigeration circuit according to claim 1, 2 or 3, characterized in that it also consists of at least one low-temperature compressor (19) and another heat exchanger (16), and that the refrigeration circuit is further configured to supply two or more evaporators ( 18) having an outlet configured to enter the circuit of another heat exchanger (16) exchanging heat with the main liquid stream exiting the liquid/vapor separator (5) circulating on the other side of said heat exchanger (16). 5. Postupak u rashladnom krugu s više isparivača tipa niskotlačnog prijemnika prilagođen za uporabu ugljičnog dioksida kao rashladnog sredstva, pri čemu se rashladni krug s više isparivača sastoji od barem: - kompresora (1), - kondenzatora/plinskog hladnjaka (2), - ventila za regulaciju visokog tlaka (4), - separatora za tekućinu/pare (5), - redukcionog tlačnog ventila (9), - uređaja za očitovanje razine tekućine (22, 23), - dva ili više isparivača (7), i - usisnog prijemnika (8), pri čemu se postupak sastoji od punjenja rashladnim sredstvom dva ili više isparivača (7) iz navedenog separatora tekućine/pare (5) kroz prigušnicu (6), naznačen time da se rashladni krug nadalje sastoji od barem jednog ejektora (14) koji se sastoji od priključka za usisavanje (15) koji je paralelan s ventilom za regulaciju visokog tlaka (4); a da se postupak nadalje sastoji od toga da hladnu tekućinu vodi kroz usisni prijemnik (8) do priključka za usisavanje (15) barem jednog od navedenih ejektora (14) radi održavanja dovoljne razine tekućine u separatoru tekućine/pare (5), čak i ako je masa koja kruži kroz dva ili više isparivača (7) veća od mase koja je isparila, kroz otvor prvog kontrolnog ventila (10) u ravnini od usisnog prijemnika (8) do priključka za usisavanje (15) barem jednog ejektora (14), bazirano na najjačem signalu generirano uređajem za očitovanje razine tekućine (22), kadgod je razina tekućeg rashladnog sredstva u navedenom usisnom prijemniku (8) iznad postavljene najviše razine.5. Process in a multi-evaporator refrigeration circuit of the low-pressure receiver type adapted to use carbon dioxide as a refrigerant, wherein the multi-evaporator refrigeration circuit consists of at least: - compressor (1), - condenser/gas cooler (2), - valve for high pressure regulation (4), - liquid/vapor separator (5), - pressure reducing valve (9), - liquid level detection device (22, 23), - two or more evaporators (7), i - suction receiver (8), wherein the process consists of filling two or more evaporators (7) with refrigerant from the specified liquid/vapor separator (5) through the throttle (6), indicated that the cooling circuit further consists of at least one ejector (14) consisting of the suction port (15) which is parallel to the valve for regulating the high pressure (4); and that the process further consists of directing the cold liquid through the suction receiver (8) to the suction port (15) of at least one of said ejectors (14) in order to maintain a sufficient liquid level in the liquid/vapor separator (5), even if is the mass that circulates through two or more evaporators (7) greater than the mass that evaporated, through the opening of the first control valve (10) in the plane from the suction receiver (8) to the suction port (15) of at least one ejector (14), based on the strongest signal generated by the liquid level detection device (22), whenever the level of the liquid refrigerant in the indicated suction receiver (8) is above the set highest level. 6. Rashladni krug s više isparivača prilagođen za uporabu ugljičnog dioksida kao tekućeg rashladnog sredstva, koji se sastoji od barem: - kompresora (1), - kondenzatora/plinski hladnjak (2), - ventila za regulaciju visokog tlaka (4), - separatora tekućine/pare (5), - ventila (9) za kontrolu tlaka u separatoru tekućine/pare (5), - uređaja za očitovanje razine tekućine (22, 23), - dva ili više isparivača (7, 18), i - usisnog prijemnika (8), pri čemu je rashladni krug prilagođen tako što dva ili više isparivača (7) mogu primiti tekuće rashladno sredstvo iz navedenog separatora za tekućinu/paru (5) kroz prigušnicu (6), naznačen time da se rashladni krug nadalje sastoji od barem jednog ejektora (14) koji se sastoji od priključka za usisavanje (15) koji je paralelan s ventilom za regulaciju visokog tlaka (4); i da je rashladni krug prilagođen da hladnu tekućinu vodi kroz usisni prijemnik (8) do priključka za usisavanje (15) barem jednog od navedenih ejektora (14), a koji se aktivira za prijenos punjenja za održavanje dovoljne razine tekućine u separatoru tekućine/pare (5), čak i ako je masa koja kruži kroz dva ili više isparivača (7) veća od mase koja je isparila, kroz otvor prvog kontrolnog ventila (10) u ravnini od usisnog prijemnika (8) do priključka za usisavanje (15) barem jednog ejektora (14), bazirano na najslabijem signalu generirano uređajem za očitovanje razine tekućine (22), kadgod je razina tekućeg rashladnog sredstva u navedenom usisnom prijemniku (8) ispod postavljene najniže razine.6. A multi-evaporator refrigeration circuit adapted to use carbon dioxide as a liquid refrigerant, consisting of at least: - compressor (1), - condenser/gas cooler (2), - valve for high pressure regulation (4), - liquid/vapor separator (5), - valve (9) for pressure control in the liquid/vapor separator (5), - liquid level detection device (22, 23), - two or more evaporators (7, 18), i - suction receiver (8), wherein the cooling circuit is adapted so that two or more evaporators (7) can receive the liquid refrigerant from said liquid/vapor separator (5) through the throttle (6), indicated that the cooling circuit further consists of at least one ejector (14 ) consisting of a suction port (15) which is parallel to the high pressure control valve (4); and that the cooling circuit is adapted to conduct cold liquid through the suction receiver (8) to the suction port (15) of at least one of said ejectors (14), which is activated to transfer charge to maintain a sufficient liquid level in the liquid/vapor separator ( 5), even if the mass circulating through two or more evaporators (7) is greater than the mass that has evaporated, through the opening of the first control valve (10) in the plane from the suction receiver (8) to the suction port (15) of at least one of the ejector (14), based on the weakest signal generated by the liquid level detection device (22), whenever the level of liquid refrigerant in said suction receiver (8) is below the set minimum level. 7. Rashladni krug temeljem zahtjeva 6, naznačen time da se rashladni krug sastoji još od prvog izmjenjivača topline (3) koji ima barem primarni i sekundarni krug, pri čemu je jedan krug prvog izmjenjivača (3) prilagođen za cirkulaciju gravitacijom hladne tekućine iz usisnog prijemnika (8) da bi se zamijenila toplina visoko tlačnom tekućinom iz kondenzatora/plinskog hladnjaka (2) prilagođena da cirkulira u drugom krugu izmjenjivača topline (3).7. Cooling circuit according to claim 6, characterized in that the cooling circuit also consists of a first heat exchanger (3) which has at least a primary and a secondary circuit, whereby one circuit of the first exchanger (3) is adapted for gravity circulation of cold liquid from the suction receiver (8) to replace the heat with high-pressure fluid from the condenser/gas cooler (2) adapted to circulate in the second circuit of the heat exchanger (3). 8. Rashladni krug temeljem zahtjeva 7, naznačen time da je barem jedan ejektor (14) instaliran u zaseban cjevovod između izlaza iz kondenzatora/plinskog hladnjaka (2) i separatora tekućine/pare (5), s time da je cjevovod paralelno povezan s cjevovodom koji povezuje izlaz iz kondenzatora/plinskog hladnjaka (2) kroz izmjenjivač topline (3) s ulaznim ventilom za regulaciju visokog tlaka (4).8. Refrigeration circuit according to claim 7, characterized in that at least one ejector (14) is installed in a separate pipeline between the outlet of the condenser/gas cooler (2) and the liquid/vapor separator (5), with the pipeline being connected in parallel with the pipeline which connects the outlet from the condenser/gas cooler (2) through the heat exchanger (3) to the inlet valve for high pressure regulation (4). 9. Rashladni krug temeljem zahtjeva 6, 7, ili 8, naznačen time da se sastoji od barem jednog kompresora niske temperature (19) i drugog izmjenjivača topline (16), i da je nadalje konfiguriran tako da opskrbljuje dva ili više isparivača (18) imajući izlaz konfiguriran za ulaz u krug drugog izmjenjivača topline (16) izmjenjujući toplinu s glavnim vodom tekućine koji izlazi iz separatora tekućine/pare (5) cirkulirajući na drugoj strani tog izmjenjivača topline (16).9. Refrigeration circuit according to claim 6, 7, or 8, characterized in that it consists of at least one low-temperature compressor (19) and a second heat exchanger (16), and is further configured to supply two or more evaporators (18). having an outlet configured to enter the circuit of another heat exchanger (16) exchanging heat with the main liquid stream exiting the liquid/vapor separator (5) circulating on the other side of said heat exchanger (16). 10. Rashladni krug temeljem bilo kojeg od zahtjeva 1 do 4 ili 6 do 9, naznačen time da je uređaj za očitovanje razine tekućine (22) instaliran u jedan ili sljedeći: - usisni prijemnik (8), - separator tekućine/pare (5).10. Refrigeration circuit according to any one of claims 1 to 4 or 6 to 9, characterized in that the liquid level detection device (22) is installed in one or the following: - suction receiver (8), - liquid/vapor separator (5). 11. Rashladni krug temeljem bilo kojeg od zahtjeva 1 do 4 ili 6 do 10, naznačen time da uređaj za očitovanje razine tekućine (22) ili (23) ima razinsku sklopku.11. Refrigeration circuit according to any one of claims 1 to 4 or 6 to 10, characterized in that the device for revealing the liquid level (22) or (23) has a level switch. 12. Rashladni krug temeljem bilo kojeg od zahtjeva 1 do 4 ili 6 do 11, naznačen time da je usisni prijemnik (8) niskotlačni prijemnik.12. Cooling circuit according to any of claims 1 to 4 or 6 to 11, characterized in that the suction receiver (8) is a low-pressure receiver. 13. Rashladni sustav naznačen time da koristi sklop rashladnog kruga prema bilo kojem od zahtjeva 1 do 4 ili 6 do 12.13. A cooling system using a cooling circuit assembly according to any one of claims 1 to 4 or 6 to 12. 14. Postupak u rashladnom krugu s više isparivača tipa niskotlačnog prijemnika prilagođen za uporabu ugljičnog dioksida kao rashladnog sredstva, pri čemu se rashladni krug s više isparivača sastoji od barem: - kompresora (1), - kondenzatora/plinskog hladnjaka (2), - ventila za regulaciju visokog tlaka (4), - separatora tekućine/pare (5), - ventila za kontrolu tlaka (9), - uređaja za očitovanje razine tekućine (22, 23), - dva ili više isparivača (7), i - usisnog prijemnika (8), pri čemu se postupak sastoji od punjenja rashladnim sredstvom dva ili više isparivača (7) iz separatora tekućine/pare (5) kroz prigušnicu (6), naznačen time da se rashladni krug nadalje sastoji od barem jednog ejektora (14) koji se sastoji od priključka za usisavanje (15) koji je paralelan s ventilom za regulaciju visokog tlaka (4); a da se postupak nadalje sastoji od toga da hladnu tekućinu vodi kroz usisni prijemnik (8) do priključka za usisavanje (15) barem jednog od navedenih ejektora (14) radi održavanja dovoljne razine tekućine u separatoru tekućine/pare (5), čak i ako je masa koja kruži kroz dva ili više isparivača (7) veća od mase koja je isparila, kroz otvor prvog kontrolnog ventila (10) u ravnini od usisnog prijemnika (8) do priključka za usisavanje (15) barem jednog ejektora (14), bazirano na najslabijem signalu generirano uređajem za očitovanje razine tekućine (22), kadgod je razina tekućeg rashladnog sredstva u navedenom usisnom prijemniku (8) ispod postavljene najniže razine.14. Process in a multi-evaporator refrigeration circuit of the low-pressure receiver type adapted to use carbon dioxide as a refrigerant, wherein the multi-evaporator refrigeration circuit consists of at least: - compressor (1), - condenser/gas cooler (2), - valve for high pressure regulation (4), - liquid/vapor separator (5), - pressure control valve (9), - liquid level detection device (22, 23), - two or more evaporators (7), i - suction receiver (8), wherein the process consists of filling with refrigerant two or more evaporators (7) from the liquid/vapor separator (5) through the throttle (6), characterized in that the cooling circuit further consists of at least one ejector (14) consisting of a connection for suction (15) which is parallel to the valve for regulating the high pressure (4); and that the process further consists of directing the cold liquid through the suction receiver (8) to the suction port (15) of at least one of said ejectors (14) in order to maintain a sufficient liquid level in the liquid/vapor separator (5), even if is the mass that circulates through two or more evaporators (7) greater than the mass that evaporated, through the opening of the first control valve (10) in the plane from the suction receiver (8) to the suction port (15) of at least one ejector (14), based on the weakest signal generated by the liquid level detection device (22), whenever the liquid refrigerant level in the specified suction receiver (8) is below the set minimum level.
HRP20161607TT 2011-06-06 2016-12-01 A multi-evaporator refrigeration circuit HRP20161607T1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
IT000077A ITTV20110077A1 (en) 2011-06-06 2011-06-06 REFRIGERATOR SYSTEM WITH STEAM COMPRESSION AND DIRECT EXPANSION WITH HIGH CIRCULATION RATIO IN EVAPORATORS.
IT000141A ITTV20110141A1 (en) 2011-10-14 2011-10-14 REFRIGERANT SYSTEM WITH REFRIGERANT R744 WITH HIGH CIRCULATION REPORT IN EVAPORATORS.
IT000010A ITTV20120010A1 (en) 2012-01-19 2012-01-19 BOOSTER REFRIGERANT SYSTEM WITH REFRIGERANT R744.
PCT/FI2012/050513 WO2012168544A1 (en) 2011-06-06 2012-05-28 A multi-evaporator refrigeration circuit
EP12796452.6A EP2718642B1 (en) 2011-06-06 2012-05-28 A multi-evaporator refrigeration circuit

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