CN204478572U - A kind of carbon dioxide and fluorine cascade refrigeration and defrosting system - Google Patents

A kind of carbon dioxide and fluorine cascade refrigeration and defrosting system Download PDF

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Publication number
CN204478572U
CN204478572U CN201420838088.XU CN201420838088U CN204478572U CN 204478572 U CN204478572 U CN 204478572U CN 201420838088 U CN201420838088 U CN 201420838088U CN 204478572 U CN204478572 U CN 204478572U
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China
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oil
fluorine
ethylene glycol
defrosting
gas
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CN201420838088.XU
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Chinese (zh)
Inventor
周丹
姜立涛
王衍智
李大鹏
杜丽丽
元爱民
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松下压缩机(大连)有限公司
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Abstract

The utility model discloses a kind of carbon dioxide and fluorine cascade refrigeration and defrosting system, belong to art of refrigeration units.The utility model comprises cryogenic refrigeration cyclic part, low temperature part oil return system, high-temperature refrigeration cyclic part, high-temperature part oil return system, safety system and defrosting system; adopt heat recovery technology; utilize high temperature unit exhaust waste heat to heat the ethylene glycol in ethylene glycol case, the ethylene glycol after heating carries out defrosting to air-cooler.Compare electric defrosting and save a large amount of electric energy; Lower compared to its freezing point of water defrosting, ice can not be there is and block up or the halfway situation of defrosting; The defrosting of phase specific heat fluorine, it controls comparatively simple, and has heat accumulation function because of its ethylene glycol case, accumulation of heat can decrease system forced refrigeration to ensure the time of hot gas amount, because this reducing energy consumption when normal refrigeration.

Description

A kind of carbon dioxide and fluorine cascade refrigeration and defrosting system
Technical field
The utility model relates to art of refrigeration units, particularly relates to a kind of carbon dioxide and fluorine cascade refrigeration and defrosting system.
Background technology
At present, due to the impact of global warming, freon class cold-producing medium is to the destruction of ozone layer in addition, and the environmental consciousness making people is more and more stronger, and therefore the application of natural refrigerant has been trend of the times.Natural medium carbon dioxide is due to its good environmental index, as nontoxic, non-combustible, and destroy that ozone index is 0, greenhouse effects index is 1, add that its good chemical stability is good, even if also can not pernicious gas be decomposited in the event of high temperatures, carbon dioxide is made to become the target of people's research once again.
Because fluorine and carbon dioxide cascade system not only have the advantage of natural refrigerant, and greatly reduce the consumption of fluorinated refrigerant; Although carbon dioxide has the feature of high pressure, carbon dioxide is operated in subcritical as low-temperature level, and its pressure is controlled; Therefore it has good development prospect.
Electric defrosting, water defrosting, hot gas defrosting are mainly contained for current carbon dioxide air-cooler defrosting mode, contrasts this several defrosting mode electricity defrosting and consume a large amount of electric energy; Likely there is the problems such as the stifled or defrosting of ice is not thorough in the application of low temperature place in water defrosting mode because the freezing point of water is higher; Hot gas defrosting need ensure enough hot gas and be used for defrosting, and this has part air-cooler to be in forced refrigeration state to ensure hot gas amount with regard to needing while defrosting, and control system to compare other defrosting mode comparatively complicated.
Utility model content
The utility model for existing carbon dioxide refrigeration set forth above and high, the defrosting of defrosting system defrosting power consumption thoroughly and part air-cooler must forced refrigeration to ensure the problem of hot gas amount, and research and design one carbon dioxide and fluorine cascade refrigeration and defrosting system.The technological means that the utility model adopts is as follows:
A kind of carbon dioxide and fluorine cascade refrigeration and defrosting system, comprise following part:
Cryogenic refrigeration cyclic part: the carbon dioxide refrigerating machine group be made up of two and above compressor A is connected through the gas access of blast pipe with oil eliminator A, the gas vent of described oil eliminator A is connected with the air inlet of evaporative condenser through check (non-return) valve A, the liquid outlet of described evaporative condenser is connected with the inlet of carbon dioxide reservoir, described carbon dioxide reservoir liquid outlet drying filter be connected with the inlet of air-cooler with electric expansion valve, described electric expansion valve is the electric expansion valve that power-off is closed, the gas returning port of described air-cooler is connected with the air inlet of gas-liquid separator, the gas outlet of described gas-liquid separator is connected through the air entry of suction filter with carbon dioxide refrigerating machine group,
Low temperature part oil return system: the described oil-out of oil eliminator A is connected with the oil-in of oil storage tank, the oil-out of described oil storage tank is connected with the oil return opening of each compressor A through the oil level controllers A of each compressor A, and the Stress control aperture oil pressure difference limen of described oil storage tank A is connected with air suction main;
High-temperature refrigeration cyclic part: the fluorine cooling system unit be made up of two and above compressor B is connected through the air inlet of blast pipe with oil eliminator B, the gas outlet of described oil eliminator B is connected with the air intake of condenser through magnetic valve A, the liquid outlet of described condenser is connected with the inlet of fluorine system reservoir, the liquid outlet of described fluorine system reservoir is successively through device for drying and filtering, magnetic valve B is connected with the inlet of evaporative condenser with electric expansion valve, the gas outlet of described evaporative condenser is connected with the air inlet of gas-liquid separator through pressure-regulating valve, the gas outlet of described gas-liquid separator is connected with the air entry of fluorine cooling system unit, another road drying filter of the liquid outlet of fluorine system reservoir, magnetic valve C is connected with the inlet of heating power expansion valve with the internal heat exchange tubes of carbon dioxide reservoir, the gas outlet of internal heat exchange tubes of described carbon dioxide reservoir is connected with the air inlet of gas-liquid separator,
High-temperature part oil return system: the oil-out of described oil eliminator B is connected with the oil-in of oil storage tank B, the oil-out of described oil storage tank B is connected with the oil return opening of each compressor B through the oil level controllers B of each compressor B, and the Stress control aperture stop valve A of described oil storage tank B is connected with air suction main;
Safety system: the gas outlet of described oil eliminator A is connected with expansion drum with pressure-regulating valve through check (non-return) valve A, and described expansion drum is connected with the air inlet of gas-liquid separator through stop valve B, and described expansion drum is provided with safety valve.Fluorine cooling system unit is made up of two and above compressor, has the using function of refrigeration of freezing at ordinary times and meet an urgent need.
Defrosting system: another road, gas outlet of described oil eliminator B is connected with the air inlet of ethylene glycol case through magnetic valve D, the fluorine condensate liquid liquid outlet of described ethylene glycol case is connected with the inlet of reservoir, the ethylene glycol liquid outlet of described ethylene glycol case is connected with the ethylene glycol inlet of air-cooler with water flow switch by eg pump, check (non-return) valve B, Y-filter, motor-driven valve, and the ethylene glycol liquid outlet of air-cooler is connected with the ethylene glycol inlet of ethylene glycol case.
Further, described fluorine cooling system unit adopts multiloop to control and dual power supply, and described dual power supply comprises normal power source and emergency power supply, described normal power source and emergency power supply automatic switching.Emergent refrigeration relevant control and distribution all adopt dual power supply.
Further, described ethylene glycol case inside is provided with the heat exchanger tube carrying out heat exchange for ethylene glycol and fluorine, and ethylene glycol case of telling has heat accumulation function.
Further, described air-cooler is four-pipe system air-cooler, and namely refrigeration and defrosting are independent loop, and emergent refrigeration is for controlling pressure carbon dioxide in safe range.
Compared with the prior art, a kind of carbon dioxide described in the utility model and fluorine cascade refrigeration and defrosting system adopt heat recovery technology, utilize high temperature unit exhaust waste heat to heat the ethylene glycol in ethylene glycol case, the ethylene glycol after heating carries out defrosting to air-cooler.Compare electric defrosting and save a large amount of electric energy; Lower compared to its freezing point of water defrosting, ice can not be there is and block up or the halfway situation of defrosting; The defrosting of phase specific heat fluorine, it controls comparatively simple, and has heat accumulation function because of its ethylene glycol case, accumulation of heat can decrease system forced refrigeration to ensure the time of hot gas amount, because this reducing energy consumption when normal refrigeration.
Accompanying drawing explanation
Fig. 1 is the utility model system principle schematic diagram.
In figure: 1, carbon dioxide refrigerating machine group; 2, oil eliminator A; 3, check (non-return) valve A; 4, safety valve A; 5, expansion drum; 6, pressure-regulating valve B; 7, pressure-regulating valve A; 8, device for drying and filtering B; 9, magnetic valve B; 10, electric expansion valve B; 11, evaporative condenser; 12, device for drying and filtering A; 13, oil storage tank B; 14, gas-liquid separator A; 15, oil level controllers B; 16, magnetic valve C; 17, heating power expansion valve; 18, oil eliminator B; 19, fluorine system reservoir; 20, safety valve B; 21, condenser; 22, carbon dioxide reservoir; 23, safety valve C; 24, safety valve D; 25, safety valve E; 26, stop valve A; 27, device for drying and filtering C; 28, electric expansion valve A; 29, air-cooler; 30, gas-liquid separator B; 31, oil pressure difference limen; 32, oil storage tank A; 33, oil level controllers A; 34, fluorine cooling system unit; 35, ethylene glycol case; 36, eg pump; 37, magnetic valve D; 38, magnetic valve A; 39, water flow switch; 40, motor-driven valve; 41, Y-filter; 43, stop valve B; 44, safety valve F; 45, check (non-return) valve B; 46, compressor A; 47, compressor B.
Detailed description of the invention
As shown in Figure 1, a kind of carbon dioxide and fluorine cascade refrigeration and defrosting system, comprise following part:
Cryogenic refrigeration cyclic part: the carbon dioxide refrigerating machine group 1 be made up of two and above compressor A46 is connected through the gas access of blast pipe with oil eliminator A2, the gas vent of described oil eliminator A2 is connected with the air inlet of evaporative condenser 11 through check (non-return) valve A3, the liquid outlet of described evaporative condenser 11 is connected with the inlet of carbon dioxide reservoir 22, described carbon dioxide reservoir 22 liquid outlet drying filter C27 be connected with the inlet of air-cooler 29 with electric expansion valve A28, the gas returning port of described air-cooler 29 is connected with the air inlet of gas-liquid separator B30, the gas outlet of described gas-liquid separator B30 is connected through the air entry of suction filter with carbon dioxide refrigerating machine group 1.Carbon-dioxide gas compressor group 1 exhaust enters oil eliminator 2, high temperature and high pressure gas after separation enters evaporative condenser 11 through check (non-return) valve A3 and is condensed into highly pressurised liquid, condensed highly pressurised liquid enters carbon dioxide reservoir 22 and stores, highly pressurised liquid drying filter C27 in carbon dioxide reservoir 22, electric expansion valve A28 (power-off closedown) reducing pressure by regulating flow enters air-cooler 29 evaporation and becomes low-pressure steam, low-pressure steam enters gas-liquid separator B30 and carries out gas-liquid separation, gas after separation is entered next circulation through filter by the suction of carbon-dioxide gas compressor group, carbon dioxide reservoir 22 is provided with safety valve C23, gas-liquid separator B30 is provided with safety valve F44.
Low temperature part oil return system: the oil-out of described oil eliminator A2 is connected with the oil-in of oil storage tank A32, the oil-out of described oil storage tank A32 is connected with the oil return opening of each compressor A46 through the oil level controllers A33 of each compressor A46, and the Stress control aperture oil pressure difference limen 31 of described oil storage tank A32 is connected with air suction main.Enter oil storage tank A32 through the isolated oil of oil eliminator A2, the oil in oil storage tank A32 gets back to compressor through oil level controllers A33; Another road of oil storage tank A32 is connected through the air inlet pipe of oil pressure difference limen 31 with gas-liquid separator B30, to ensure that the oil that oil eliminator A2 and oil storage tank A32 exists in a pressure official post oil eliminator A2 can enter oil storage tank A32 smoothly.
High-temperature refrigeration cyclic part: the fluorine cooling system unit 34 be made up of two and above compressor B47 is connected through the air inlet of blast pipe with oil eliminator B18, the gas outlet of described oil eliminator B18 is connected with the air intake of condenser 21 through magnetic valve A38, the liquid outlet of described condenser 21 is connected with the inlet of fluorine system reservoir 19, the liquid outlet of described fluorine system reservoir 19 is successively through device for drying and filtering B8, magnetic valve B9 is connected with the inlet of evaporative condenser 11 with electric expansion valve B10, the gas outlet of described evaporative condenser 11 is connected with the air inlet of gas-liquid separator A14 through pressure-regulating valve A7, the gas outlet of described gas-liquid separator A14 is connected with the air entry of fluorine cooling system unit 34, another road drying filter A12 of the liquid outlet of fluorine system reservoir 19, magnetic valve C16 is connected with the inlet of heating power expansion valve 17 with the internal heat exchange tubes of carbon dioxide reservoir 22, the gas outlet of the internal heat exchange tubes of described carbon dioxide reservoir 22 is connected with the air inlet of gas-liquid separator A14.Fluorine cooling system unit 34 is vented after oil eliminator B18 divides oil, hot fluorine enters condenser 21 through magnetic valve A38 to carry out condensation and becomes highly pressurised liquid, highly pressurised liquid enters reservoir 19, reservoir 19 mesohigh liquid drying filter B 8, magnetic valve B9, enter evaporative condenser 11 evaporation after electric expansion valve B10 reducing pressure by regulating flow and become low-pressure steam, low-pressure steam enters gas-liquid separator A14 through pressure-regulating valve A7, low-pressure gas after separation is sucked by compressor and enters next circulation, fluorine system reservoir 19 is provided with safety valve B20, gas-liquid separator A14 is provided with safety valve E25.
High-temperature part oil return system: the oil-out of described oil eliminator B18 is connected with the oil-in of oil storage tank B13, the oil-out of described oil storage tank B13 is connected with the oil return opening of each compressor B47 through the oil level controllers B15 of each compressor B47, and the Stress control aperture stop valve A26 of described oil storage tank B13 is connected with air suction main.Enter oil storage tank B13 through the isolated oil of oil eliminator B18, the oil in oil storage tank B13 gets back to compressor through oil level controllers B15; Oil storage tank B13 mono-tunnel is connected with the air inlet pipe entering gas-liquid separator A14 through stop valve A26, to ensure that the oil that oil eliminator B18 and oil storage tank B13 exists in a pressure official post oil eliminator B18 can enter oil storage tank B13 smoothly, oil eliminator B18 is provided with safety valve D24.
Safety system: the gas outlet of described oil eliminator A2 is connected with expansion drum 5 with pressure-regulating valve 6 through check (non-return) valve A3, described expansion drum 5 is connected with the air inlet of gas-liquid separator B30 through stop valve B43, and described expansion drum 5 is provided with safety valve A4.The present embodiment considers the high pressure characteristic of carbon dioxide, have employed triple safe protection i.e. emergent low-temperature receiver (maintenance machine), expansion drum, safety valve; Fluorine cooling system unit 34 is made up of multiple compressors, there is refrigeration and emergent low-temperature receiver (maintenance machine) using function of conduct at ordinary times, fluorine cooling system unit 34 adopts multiloop to control, emergent refrigeration relevant control and distribution all adopt dual power supply (wherein a power supply is emergency power supply), normal power source and emergency power supply automatic switching, to be made up of multiple compressors because of fluorine cooling system unit 34 and to adopt multiloop to control, even if certain compressor fault does not affect whole unit operation yet.Fluorine system reservoir 19 mesohigh liquid becomes low pressure liquid and enters in carbon dioxide reservoir 22 heat exchanger tube and carry out heat exchange to reduce the pressure of carbon dioxide in carbon dioxide reservoir 22 with carbon dioxide in carbon dioxide reservoir 22 after separating a road drying filter A12, magnetic valve C16, heating power expansion valve 17 reducing pressure by regulating flow, fluorine low-pressure steam after evaporation enters gas-liquid separator A14 and carries out gas-liquid separation, and the low-pressure gas after separation is sucked back by fluorine cooling system unit 34.Cryogenic system high-pressure section oil eliminator A2 separates a road through check (non-return) valve A3 and connects expansion drum 5 through pressure-regulating valve 6, wherein pressure-regulating valve 6 according to its aperture of cryogenic system high-pressure section pressure adjusting to ensure that cryogenic system high-pressure section pressure maintains in safe range; Another road pipeline of expansion drum 5 is connected to reclaim expansion drum inner refrigerant with gas-liquid separator B30 air inlet through stop valve B43.Wherein the employing of safety valve A4 further ensure that the safety of system.
Defrosting system: another road, gas outlet of described oil eliminator B18 is connected with the air inlet of ethylene glycol case 35 through magnetic valve D37, the fluorine condensate liquid liquid outlet of described ethylene glycol case 35 is connected with the inlet of reservoir 19, the ethylene glycol liquid outlet of described ethylene glycol case 35 is connected with the ethylene glycol inlet of air-cooler 29 with water flow switch 39 by eg pump 36, check (non-return) valve B45, Y-filter 41, motor-driven valve 40, and the ethylene glycol liquid outlet of air-cooler 29 is connected with the ethylene glycol inlet of ethylene glycol case 35.In order to better reach the object of energy-conserving and environment-protective, native system utilizes exhaust waste heat heated glycol, the hot fluorine of discharging through oil eliminator B18 separates a road and enters ethylene glycol case 35 through magnetic valve D37 and carry out heat exchange with ethylene glycol solution, and the fluorine liquid after condenser enters fluorine system reservoir 19; Ethylene glycol solution enters air-cooler 29 carry out defrosting through eg pump 36, check (non-return) valve B45, y-type filter 41, motor-driven valve 40, water flow switch 39, and the air-cooler 29 of now corresponding defrosting should stop refrigeration.
The above; be only the utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and inventive concept thereof and replace or change, all should be encompassed within protection domain of the present utility model.

Claims (4)

1. carbon dioxide and fluorine cascade refrigeration and a defrosting system, is characterized in that: comprise
Cryogenic refrigeration cyclic part: the carbon dioxide refrigerating machine group (1) be made up of two and above compressor A (46) is connected through the gas access of blast pipe with oil eliminator A (2), the gas vent of described oil eliminator A (2) is connected with the air inlet of evaporative condenser (11) through check (non-return) valve A (3), the liquid outlet of described evaporative condenser (11) is connected with the inlet of carbon dioxide reservoir (22), described carbon dioxide reservoir (22) liquid outlet drying filter C (27) be connected with the inlet of air-cooler (29) with electric expansion valve A (28), the gas returning port of described air-cooler (29) is connected with the air inlet of gas-liquid separator B (30), the gas outlet of described gas-liquid separator B (30) is connected through the air entry of suction filter with carbon dioxide refrigerating machine group (1),
Low temperature part oil return system: the oil-out of described oil eliminator A (2) is connected with the oil-in of oil storage tank A (32), the oil-out of described oil storage tank A (32) is connected with the oil return opening of each compressor A (46) through the oil level controllers A (33) of each compressor A (46), and Stress control aperture oil pressure difference limen (31) of described oil storage tank A (32) is connected with air suction main;
High-temperature refrigeration cyclic part: the fluorine cooling system unit (34) be made up of two and above compressor B (47) is connected through the air inlet of blast pipe with oil eliminator B (18), the gas outlet of described oil eliminator B (18) is connected with the air intake of condenser (21) through magnetic valve A (38), the liquid outlet of described condenser (21) is connected with the inlet of fluorine system reservoir (19), the liquid outlet of described fluorine system reservoir (19) is successively through device for drying and filtering B (8), magnetic valve B (9) is connected with the inlet of evaporative condenser (11) with electric expansion valve B (10), the gas outlet of described evaporative condenser (11) is connected with the air inlet of gas-liquid separator A (14) through pressure-regulating valve A (7), the gas outlet of described gas-liquid separator A (14) is connected with the air entry of fluorine cooling system unit (34), another road drying filter A (12) of the liquid outlet of fluorine system reservoir (19), magnetic valve C (16) is connected with the inlet of heating power expansion valve (17) with the internal heat exchange tubes of carbon dioxide reservoir (22), the gas outlet of the internal heat exchange tubes of described carbon dioxide reservoir (22) is connected with the air inlet of gas-liquid separator A (14),
High-temperature part oil return system: the oil-out of described oil eliminator B (18) is connected with the oil-in of oil storage tank B (13), the oil-out of described oil storage tank B (13) is connected with the oil return opening of each compressor B (47) through the oil level controllers B (15) of each compressor B (47), and Stress control aperture stop valve A (26) of described oil storage tank B (13) is connected with air suction main;
Safety system: the gas outlet of described oil eliminator A (2) is connected with expansion drum (5) with pressure-regulating valve B (6) through check (non-return) valve A (3); described expansion drum (5) is connected with the air inlet of gas-liquid separator B (30) through stop valve B (43), and described expansion drum (5) is provided with safety valve A (4).
Defrosting system: another road, gas outlet of described oil eliminator B (18) is connected with the air inlet of ethylene glycol case (35) through magnetic valve D (37), the fluorine condensate liquid liquid outlet of described ethylene glycol case (35) is connected with the inlet of reservoir (19), the ethylene glycol liquid outlet of described ethylene glycol case (35) is by eg pump (36), check (non-return) valve B (45), Y-filter (41), motor-driven valve (40) is connected with the ethylene glycol inlet of water flow switch (39) with air-cooler (29), the ethylene glycol liquid outlet of air-cooler (29) is connected with the ethylene glycol inlet of ethylene glycol case (35).
2. carbon dioxide according to claim 1 and fluorine cascade refrigeration and defrosting system, it is characterized in that: described fluorine cooling system unit (34) adopts multiloop to control and dual power supply, described dual power supply comprises normal power source and emergency power supply, described normal power source and emergency power supply automatic switching.
3. carbon dioxide according to claim 1 and fluorine cascade refrigeration and defrosting system, it is characterized in that: described ethylene glycol case (35) inside is provided with the heat exchanger tube carrying out heat exchange for ethylene glycol and fluorine, and institute's ethylene glycol case of telling (35) has heat accumulation function.
4. carbon dioxide according to claim 1 and fluorine cascade refrigeration and defrosting system, is characterized in that: described air-cooler (29) is four-pipe system air-cooler.
CN201420838088.XU 2014-12-24 2014-12-24 A kind of carbon dioxide and fluorine cascade refrigeration and defrosting system CN204478572U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104567071A (en) * 2014-12-24 2015-04-29 松下压缩机(大连)有限公司 Carbon dioxide and fluorine cascade refrigeration and defrosting system
CN105972889A (en) * 2016-06-23 2016-09-28 刘滕军 Auto-induction hot water defrosting air cooler
CN105972887A (en) * 2016-06-23 2016-09-28 刘滕军 Automatic induction hot water defrosting device for air cooler
CN105972891A (en) * 2016-06-23 2016-09-28 刘滕军 Automatic induction hot-water anti-freezing defrosting device for air cooler
CN106091502A (en) * 2016-06-23 2016-11-09 刘滕军 Automatically sensing hot water antifreeze defrost air-cooler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104567071A (en) * 2014-12-24 2015-04-29 松下压缩机(大连)有限公司 Carbon dioxide and fluorine cascade refrigeration and defrosting system
CN105972889A (en) * 2016-06-23 2016-09-28 刘滕军 Auto-induction hot water defrosting air cooler
CN105972887A (en) * 2016-06-23 2016-09-28 刘滕军 Automatic induction hot water defrosting device for air cooler
CN105972891A (en) * 2016-06-23 2016-09-28 刘滕军 Automatic induction hot-water anti-freezing defrosting device for air cooler
CN106091502A (en) * 2016-06-23 2016-11-09 刘滕军 Automatically sensing hot water antifreeze defrost air-cooler

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