CN101371082B - Refrigeration apparatus - Google Patents

Refrigeration apparatus Download PDF

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Publication number
CN101371082B
CN101371082B CN2007800022390A CN200780002239A CN101371082B CN 101371082 B CN101371082 B CN 101371082B CN 2007800022390 A CN2007800022390 A CN 2007800022390A CN 200780002239 A CN200780002239 A CN 200780002239A CN 101371082 B CN101371082 B CN 101371082B
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CN
China
Prior art keywords
mentioned
cold
refrigerators
condenser
refrigerating plant
Prior art date
Application number
CN2007800022390A
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Chinese (zh)
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CN101371082A (en
Inventor
井上修行
Original Assignee
株式会社荏原制作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to JP2006002977A priority Critical patent/JP5096678B2/en
Priority to JP002977/2006 priority
Application filed by 株式会社荏原制作所 filed Critical 株式会社荏原制作所
Priority to PCT/JP2007/050372 priority patent/WO2007080994A1/en
Publication of CN101371082A publication Critical patent/CN101371082A/en
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Publication of CN101371082B publication Critical patent/CN101371082B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B1/00Compression machines, plant, or systems with non-reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/06Several compression cycles arranged in parallel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/13Economisers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B9/00Compression machines, plant, or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/06Compression machines, plant, or systems, in which the refrigerant is air or other gas of low boiling point using expanders

Abstract

The invention relates to a cooling apparatus having multiple refrigeration units (20-1, 20-2) each including evaporator (21-1, 21-2) structured to deprive cold water of heat and cause a refrigerant to evaporate, thereby exerting refrigerating effect; compressor (23-1, 23-2) for compressing of refrigerant vapor into high-pressure vapor; and condenser (25-1, 25-2) for cooling of the high-pressure vapor with cooling water to thereby achieve condensation. The cold water is connected in series with the evaporators (21-1,21-2) of the multiple refrigeration units (20-1, 20-2), and is sequentially cooled by the heat of evaporation of the refrigerant of the multiple evaporators (21-1, 21-2). The cooling water is connected in series with the condensers (25-1, 25-2) of the multiple refrigeration units (20-1, 20-2), and sequentially cools the refrigerant of the multiple condensers (25-1, 25-2).

Description

Refrigerating plant

Technical field

The present invention relates to cooling fluid (cooling sources such as cooling water, tempering air) and use the fluid that carries out sensible heat and change, the fluid that is cooled to use cold water or salt solution etc. to carry out the refrigerating plant of the fluid of sensible heat variation, relate in particular to refrigerating plant with a plurality of refrigerators.

Background technology

In the past, have the refrigerating plant (for example openly speciallyying permit communique 2003-130428 number with reference to Japan) that a plurality of refrigerators that are made of evaporimeter, compressor and condenser etc. constitute is set.Figure 19 is the structure chart of an example of this refrigerating plant of expression, and Figure 20 is the figure of the supply condition of cold water and cooling water in this refrigerating plant of expression.Refrigerating plant shown in two figure has 2 refrigerator 200-1,200-2, connect evaporimeter 201-1,201-2, compressor 203-1,203-2, condenser 205-1,205-2 and expansion valve 207-1,207-2 with refrigerant tubing 209-1,209-2 respectively, constitute the closed system that cold-producing medium is circulated respectively in closed loop.

And, gave each evaporimeter 201-1,201-2 feeding cold water (fluid is cooled) in the past side by side, and supply with cooling water (cooling fluid) for side by side each condenser 205-1,205-2.If adopt the supply mode of this cold water and cooling water, has following feature: under the little situation of refrigeration content, can reduce the platform numerical control system of platform number of refrigerator 200-1, the 200-2 of running, and cold water, cooling water also can increase and decrease according to capacity, can be corresponding with sub-load.

But on the other hand, there is following problem in the refrigerating plant of above-mentioned prior art: when sub-load (during platform numerical control system), evaporimeter 201-1,201-2 and condenser 205-1, the 205-2 of refrigerator 200-1, the 200-2 that stops stop, therefore they can not play the effect of heat transfer, and refrigerating plant can not be raised the efficiency when sub-load.

Summary of the invention

The present invention puts to finish in view of the above problems, its purpose is to provide a kind of refrigerating plant that is made of many refrigerators, efficient when this refrigerating plant can improve full load, and, when sub-load, also a plurality of evaporimeters and condenser can be often utilized, high sub-load efficient can be kept simultaneously.

A kind of form of the present invention is a kind of refrigerating plant, it is characterized in that: have a plurality of refrigerators, described refrigerator has: make the cold-producing medium evaporation and the evaporimeter of performance refrigeration from the absorption of fluids heat that is cooled, compress above-mentioned refrigerant vapour and make its compressor that becomes HCS, and cool off the condenser that HCS condenses it by cooling fluid; The above-mentioned fluid that is cooled is connected with the evaporator series of above-mentioned a plurality of refrigerators, is cooled off by the heat of evaporation of the cold-producing medium of a plurality of evaporimeters successively; The condenser of above-mentioned cooling fluid and above-mentioned a plurality of refrigerators is connected in series, cool off the cold-producing medium of a plurality of condensers successively, a plurality of compressors by the above-mentioned a plurality of refrigerators of same Motor Drive, between above-mentioned motor and the above-mentioned a plurality of compressor is labyrinth sealing, above-mentioned motor is a closed type, be in the cold-producing medium environment, adjust the loop by refrigerant amount between above-mentioned a plurality of refrigerators and connect, adjust the amount that the cold-producing medium of above-mentioned a plurality of refrigerators is adjusted in the loop by above-mentioned refrigerant amount.

Preferred configuration of the present invention is characterised in that, is arranged in each zoning after the drum zoning to the evaporimeter of the above-mentioned a plurality of refrigerators of major general; Perhaps the condenser with above-mentioned a plurality of refrigerators is arranged in each zoning after the drum zoning.

Preferred configuration of the present invention is characterised in that, is provided with recovery flows to the energy that the cold-producing medium stream of evaporimeter had from condenser power recovery decompressor in each condenser that connects above-mentioned a plurality of refrigerators and the refrigerant tubing between the evaporimeter.

Preferred configuration of the present invention is characterised in that above-mentioned power recovery decompressor reclaims power by the energy drives generator that is had by cold-producing medium stream.

Because the fluid that is cooled is connected with the evaporator series of a plurality of refrigerators, and the condenser of cooling fluid and a plurality of refrigerators is connected in series, therefore can utilize the sensible heat of cooling fluid to change and the sensible heat of the fluid that is cooled efficient and the efficient during sub-load when changing full load all maintains very highly, therefore can reach the purpose that improves the refrigerating plant whole efficiency.

If adopt the preferred configuration of the invention described above, can realize the simplification of compressor arrangement.

If adopt the preferred configuration of the invention described above, can realize the simplification of evaporation structure and/or condenser structure.

If adopt the preferred configuration of the invention described above, can when expanding, reclaim by cold-producing medium power (flowing the energy that is had to the cold-producing medium of evaporimeter) from condenser, can increase refrigeration simultaneously.

If adopt the preferred configuration of the invention described above, owing to used generator in the power recovery decompressor, therefore can change the rotary speed of power recovery decompressor by electric intake, can easily carry out the rotary speed control of power recovery decompressor.

Description of drawings

Fig. 1 is the figure of the kind of refrigeration cycle of expression refrigerator 20.

Fig. 2 is the structure chart of refrigerator 20.

Fig. 3 is the figure of the kind of refrigeration cycle of expression refrigerator 20A.

Fig. 4 is the structure chart of refrigerator 20A.

Fig. 5 is the figure of the kind of refrigeration cycle of expression refrigerator 20B.

Fig. 6 is the structure chart of refrigerator 20B.

Fig. 7 is the structure chart of the refrigerating plant of expression the present invention the 1st embodiment

Fig. 8 is the figure of the supply condition of the cold water of refrigerating plant of expression the 1st embodiment and cooling water.

Fig. 9 is the figure of the kind of refrigeration cycle of each refrigerator 20-1,20-2 of expression the 1st embodiment.

Figure 10 is the figure of the kind of refrigeration cycle of each refrigerator 200-1,200-2 of the refrigerating plant of expression prior art shown in Figure 19.

Figure 11 is for the evaporating temperature with respect to cold water temperature of each refrigerator 20-1,20-2 of the refrigerating plant of expression the 1st embodiment, with respect to the figure of the condensation temperature of cooling water temperature.

Figure 12 is for the evaporating temperature with respect to cold water temperature of each refrigerator 200-1,200-2 of the refrigerating plant of expression prior art shown in Figure 19, with respect to the figure of the condensation temperature of cooling water temperature.

Figure 13 is the figure of the supply condition of the cold water of refrigerating plant of expression the 2nd embodiment and cooling water.

Figure 14 is the figure of the kind of refrigeration cycle of each refrigerator 20-1,20-2 of the refrigerating plant of expression the 2nd embodiment.

Figure 15 is for the evaporating temperature with respect to cold water temperature of each refrigerator 20-1,20-2 of the refrigerating plant of expression the 2nd embodiment, with respect to the figure of the condensation temperature of cooling water temperature.

Figure 16 is the structure chart of the refrigerating plant of the present invention's the 3rd embodiment.

Figure 17 is the figure of the supply condition of the cold water of refrigerating plant of expression the 3rd embodiment and cooling water.

Figure 18 is the structure chart of the variation of the refrigerating plant of the present invention's the 3rd embodiment.

Figure 19 is the structure chart of an example of the refrigerating plant of expression prior art.

Figure 20 is the figure of the supply condition of the cold water of expression refrigerating plant shown in Figure 19 and cooling water.

The specific embodiment

Below, the embodiment that present invention will be described in detail with reference to the accompanying.

Because refrigerator of the present invention is made of a plurality of refrigerators (carrying out the compression refrigerator of steam compression type refrigerating circulation), and therefore the concrete example of the refrigerator monomer that the present invention uses is described in advance.Fig. 2, Fig. 4 and Fig. 6 are that expression can be used in the refrigerator 20 of refrigerating plant of the present invention, the structure chart of 20A, 20B, and Fig. 1, Fig. 3 and Fig. 5 are respectively the figure of the kind of refrigeration cycle of expression refrigerator 20,20A, 20B.Refrigerator 20 shown in Figure 2 is made of the closed system of enclosing cold-producing medium, particularly, will from cold water (fluid is cooled) absorb that heat makes the cold-producing medium evaporation and evaporimeter 21, the above-mentioned refrigerant vapour of compression of performance refrigeration make its compressor that becomes HCS 23, with the expansion valve 27 that cooling water (cooling fluid) cooling HCS makes its condenser that condenses 25 and the above-mentioned cold-producing medium that condenses is reduced pressure and makes its expansion, constitute by refrigerant tubing 29 connections.

Refrigerator 20A shown in Figure 4 also constitutes with the closed system of enclosing cold-producing medium, be with the difference of refrigerator 20 shown in Figure 2, compare with refrigerator 20, in order to realize high efficiency, between condenser 25 and evaporimeter 21, be provided with many (2) energy-saving appliances (gas-liquid separator) 31,31 ', and with compressor 23,23 ', 23 " be divided into multistage (3 grades), in the middle of each compression stage, attract from energy-saving appliance 31,31 ' refrigerant vapour.Therefore, form 2 grades of economic circulations shown in Figure 3.Generally between condenser 25 and the energy-saving appliance 31, energy-saving appliance 31 and energy-saving appliance 31 ' between, energy-saving appliance 31 ' and evaporimeter 21 between expansion valve is set respectively.In addition, Fig. 4 only represent energy-saving appliance 31 ' and evaporimeter 21 between expansion valve 27 is set.

Economic circulation has 2 stage compressors and 1 single-stage energy-saving appliance that energy-saving appliance is combined into, the perhaps N level energy-saving appliance that is combined into of (N+1) stage compressor and N platform energy-saving appliance etc., and generally speaking, it is high more that progression increases efficient more.The present invention also can replace 2 grades of energy-saving appliances shown in Figure 4 with single-stage or N level energy-saving appliance.

And refrigerator 20B shown in Figure 6 also is made of the closed system of enclosing cold-producing medium, is with the difference of refrigerator 20 shown in Figure 2, power recovery decompressor 28 is installed is replaced expansion valves 27.Power recovery decompressor 28 is to instigate condensate liquid to expand to flow to evaporimeter 21, and reclaims the device of power by power recovery machine (generator) 281.If adopt such structure, like that, enthalpy reduces during expansion shown in the line segment a1 as shown in Figure 5, can reclaim power (cold-producing medium that flows to evaporimeter 21 from condenser 25 flows the energy that is had), the corresponding increase of refrigeration simultaneously.Under the situation of this refrigerator 20B, can realize the high efficiency with the situation same degree of refrigerator 20A shown in Figure 4, and not need to be provided with compressor 23 etc. multistagely, therefore simple in structure.As present embodiment, reclaiming power wishes to reclaim as electricity, the power that has reclaimed can be used as the part of the driving power of compressor 23 and uses, the auxiliary body that perhaps can be used as water supply pump or refrigerating plants such as cooling water pump, cooling tower drives the part of power and uses, can link in addition in other the power system as and the irrelevant various device of refrigerating plant drive uses such as power.And as present embodiment, power recovery decompressor 28 uses under the situation of generator 281, can change the rotary speed of power recovery decompressor 28 by the intake of electricity, and the rotary speed of power recovery decompressor 28 is controlled easily.

Though the expansion valve 27 that power recovery decompressor 28 replaces Fig. 2 is set in the circulation of the power recovery of Fig. 6, but for example in the circulation of single-stage economy, as between condenser 25 and the energy-saving appliance 31 and the power recovery circulation that power recovery decompressor 28 is set respectively between energy-saving appliance 31 and the evaporimeter 21 it is raised the efficiency, also can be suitable for the present invention.

Fig. 7 is the structure chart of the refrigerating plant of expression the present invention the 1st embodiment, and Fig. 8 is the figure of the supply condition of cold water and cooling water in this refrigerating plant of expression.Refrigerating plant shown in two figure has 2 refrigerator 20-1,20-2 with above-mentioned refrigerator 20 same structures shown in Figure 2, each refrigerator 20-1,20-2 are made of the closed system of enclosing cold-producing medium as described above, connect evaporimeter 21-1,21-2, compressor 23-1,23-2, condenser 25-1,25-2 and expansion valve 27-1,27-2 by refrigerant tubing 29-1,29-2 and constitute.

And, the cold water (fluid is cooled) of supplying with this refrigerating plant is connected in series by pipeline 41 each evaporimeter 21-1,21-2 with each refrigerator 20-1,20-2, and the cooling water (cooling fluid) of supplying with this refrigerating plant also is connected in series with each condenser 25-1,25-2 by pipeline 43.Therefore, cold water is cooled off successively by the heat of evaporation of the cold-producing medium among each evaporimeter 21-1,21-2, and cooling water cools off the refrigerant vapour among each condenser 25-1,25-2 successively.In the present embodiment, make the flow direction of cold water and cooling water be the parallel flow that flows to the same direction of refrigerator 20-2 ground from refrigerator 20-1.

Owing to so in series give a plurality of refrigerator 20-1,20-2 feeding cold water and cooling water, therefore can improve average evaporating temperature, reduce average condensation temperature.That is, can reduce compression necessary head (ヘ Star De), raise the efficiency.Specify its effect below.Fig. 9 is the figure of kind of refrigeration cycle of each refrigerator 20-1,20-2 of the refrigerating plant of expression present embodiment, and Figure 10 is the figure of the kind of refrigeration cycle of each refrigerator 200-1,200-2 of the refrigerating plant of the above-mentioned prior art shown in Figure 19 of expression.And, Figure 11 for each refrigerator 20-1,20-2 of the refrigerating plant of expression present embodiment with respect to the evaporating temperature of cold water temperature and with respect to the figure of the condensation temperature of cooling water temperature, Figure 12 for each refrigerator 200-1,200-2 of the refrigerating plant of the above-mentioned prior art shown in Figure 19 of expression with respect to the evaporating temperature of cold water temperature with respect to the figure of the condensation temperature of cooling water temperature.

Cold water outlet temperature and evaporating temperature constitute narrow point (pinch) temperature among evaporimeter 21-1, the 21-2, and on the other hand, condensation temperature and cooling water outlet temperature constitute narrow some temperature among condenser 25-1, the 25-2.And, in the refrigerating plant of prior art, because cold water and cooling water offer each refrigerator 200-1,200-2 side by side, therefore as shown in Figure 10, the kind of refrigeration cycle of refrigerator 200-1,200-2 is identical, and as shown in Figure 12, each evaporimeter 201-1,201-2 are identical with narrow some temperature among each condenser 205-1,205-2, and the temperature of cold water that flows through each evaporimeter 201-1,201-2 is identical with the temperature of the cooling water that flows through each condenser 205-1,205-2.

Relative with it, therefore above-mentioned embodiment can utilize the sensible heat of cold water and cooling water to change the efficient that improves kind of refrigeration cycle because cold water and cooling water series connection offer each refrigerator 20-1,20-2 (and parallel flow).Promptly, as shown in Figure 11 cold water is in series offered each evaporimeter 21-1,21-2 by picture, and cooling water is in series offered each condenser 25-1,25-2, make narrow some temperature among two evaporimeter 21-1,21-2 and two condenser 25-1, the 25-2 different and, can improve average evaporating temperature, reduce average condensation temperature its dispersion.Because this moment, condensation temperature shown in Figure 12 equated with the temperature difference of the evaporating temperature of evaporimeter 21-2 one side with the condensation temperature of condenser 25-2 one side shown in Figure 11 with the temperature difference of evaporating temperature, the condensation temperature that therefore can make condenser 25-1 shown in Figure 11 and the temperature difference of the evaporating temperature of evaporimeter 21-1 are littler than prior art shown in Figure 12, correspondingly can reduce to compress needed head (Ya Shrink ヘ Star De) (temperature difference), the needed power of compressor 23-1 can be reduced, the efficient of refrigerating plant can be improved.

Situation when more than being full load, but (promptly use the rotary speed control of compressor 23-1,23-2 by the sub-load efficient of keeping compressor 23-1,23-2, and picture is provided with suction stator 23a-1,23a-2 at the inlet portion of compressor 23-1,23-2 as shown in Figure 7), even all compressor 23-1,23-2 also can be turned round under the situation of sub-load expeditiously, even under the situation of sub-load, all evaporimeter 21-1,21-2 and the heat-transfer area of condenser 25-1,25-2 do not stop, and they are worked.At this moment, also can make the rotary speed of the pump of cold water and cooling water circulation by control, with the flow-control of the flow of cold water and cooling water at the flow that adapts with capacity.Promptly, effective by all heat-transfer areas that make evaporimeter 21-1,21-2 and condenser 25-1,25-2, make average evaporating temperature rising and average condensation temperature is descended, this point also makes the necessary head of compression (temperature difference) reduce, necessary power is reduced, raise the efficiency.

Figure 13 is the figure of the supply condition of cold water and cooling water in the refrigerating plant of expression the 2nd embodiment of the present invention.In the cooling device shown in this figure, the part identical or suitable with the refrigerating plant of above-mentioned Fig. 7, the 1st embodiment shown in Figure 8 added identical mark.In addition, the item except that the item of following explanation is identical with the 1st embodiment.The difference of this embodiment and the 1st embodiment only is that the direction of the supply of cold water and cooling water is different.Promptly, in the refrigerating plant of present embodiment, the cold water of supplying with (fluid is cooled) is by pipeline 41 and each refrigerator 20-1, each evaporimeter 21-1 of 20-2,21-2 is connected in series, and the cooling water (cooling fluid) that offers this refrigerating plant is also by pipeline 43 and each condenser 25-1,25-2 is connected in series, therefore cold water is successively by each evaporimeter 21-1, the heat of evaporation cooling of the cold-producing medium among the 21-2, and cooling water cools off each condenser 25-2 successively, refrigerant vapour among the 25-1, but present embodiment makes cold water flow to evaporimeter 21-2 from evaporimeter 21-1, and making cooling water on the other hand is the counter current flow that flows to condenser 25-1 inversely from condenser 25-2.

Owing to such structure also is to make cold water and cooling water series connection offer a plurality of refrigerator 20-1,20-2 not have to change, therefore can improve average evaporating temperature, reduce average condensation temperature.That is, can reduce compression necessary head (temperature difference), raise the efficiency.Specify its effect below.Figure 14 is the figure of the kind of refrigeration cycle of each refrigerator 20-1,20-2 of the refrigerating plant of expression present embodiment.And, Figure 15 for each refrigerator 20-1,20-2 of expression present embodiment refrigerating plant with respect to the evaporating temperature of cold water temperature and with respect to the figure of the condensation temperature of cooling water temperature.

As mentioned above, though cold water outlet temperature and evaporating temperature constitute narrow some temperature among evaporimeter 21-1, the 21-2, on the other hand, condensation temperature and cooling water outlet temperature constitute narrow some temperature among condenser 25-1, the 25-2, but because cold water and cooling water are connected and offered each refrigerator 20-1,20-2 with counter current flow, therefore can utilize the sensible heat of cold water and cooling water to change the efficient that improves kind of refrigeration cycle in the present embodiment.Promptly, in series cold water is offered each evaporimeter 21-1,21-2 as shown in Figure 15 by picture, can make two evaporimeter 21-1,21-2 different with narrow some temperature among two condenser 25-1, the 25-2 and their are disperseed, can improve average evaporating temperature, reduce average condensation temperature.This moment, the condensation temperature of prior art example shown in Figure 12 equated with the condensation temperature of condenser 25-2 shown in Figure 15, and the evaporating temperature of prior art example shown in Figure 12 equates with the evaporating temperature of evaporimeter 21-1 shown in Figure 15.That is, the condensation temperature of condenser 25-1 shown in Figure 15 reduces, and the evaporating temperature of evaporimeter 21-2 shown in Figure 15 rises.Promptly, the condensation temperature of the condensation temperature of condenser 25-1 shown in Figure 15 and the temperature difference of the evaporating temperature of evaporimeter 21-1 and condenser 25-2 and the temperature difference of the evaporating temperature of evaporimeter 21-2 can both be than prior art example shown in Figure 12 little, correspondingly can reduce compression necessary head (temperature difference) among two compressor 23-1, the 23-2, two compressor 23-1, the needed power of 23-2 can be reduced, the efficient of refrigerating plant can be improved.

Figure 16 is the structure chart of the refrigerating plant of the present invention's the 3rd embodiment, and Figure 17 is the figure of the supply condition of cold water and cooling water in this refrigerating plant of expression.Refrigerating plant shown in two figure has 2 refrigerator 20B-1,20B-2 with above-mentioned refrigerator 20B same structure shown in Figure 6, as mentioned above, each refrigerator 20B-1,20B-2 are made of the closed system of enclosing cold-producing medium, connect evaporimeter 21-1,21-2, compressor 23-1,23-2, condenser 25-1,25-2 and power recovery decompressor 28-1,28-2 by refrigerant tubing 29-1,29-2 and constitute.The motor M of this embodiment common drive 2 compressor 23-1,23-2 is to reach the purpose of simplifying electric meter equipment relation.And motor M adopts closed type, works in the cold-producing medium environment, and carry out labyrinth sealing between motor M and two compressor 23-1,23-2.But, if a motor M goes up and connects 2 compressor 23-1,23-2 as present embodiment, the situation that exists cold-producing medium to leak to another refrigerator 20B-2 or 20B-1 from a refrigerator 20B-1 or 20B-2, if turn round this refrigerating plant for a long time, then cold-producing medium can be setovered in a certain refrigerator 20B-1 or the 20B-2 sometimes.Therefore, present embodiment connects the condenser 25-1 of a refrigerator 20B-1 and evaporimeter 21-2 and the condenser 25-2 of another refrigerator 20B-2 and the evaporimeter 21-1 of a refrigerator 20B-1 of another refrigerator 20B-2 with the pipeline 33 that has open and close valve 35 respectively, eliminates above-mentioned biasing.Be specially, the liquid level of measuring condenser 25-1 or 25-2 rises and detects the cold-producing medium surplus, opens the open and close valve 35 that is connected the pipeline 33 of a side with this condenser 25-1 or 25-2, and the refrigerant liquid of surplus is transported among another evaporimeter 21-2 or the 21-1.Because condenser 25-1 or the pressure ratio evaporimeter 21-2 of 25-2 or the pressure height of 21-1, so moving of refrigerant liquid can easily be carried out.In addition, because all refrigerant amounts that are filled in the refrigerating plant are certain, if therefore the initial stage loading is suitable, then as long as the cold-producing medium of the refrigerator 20B-1 of a superfluous side or 20B-2 is transported to the biasing that another refrigerator 20B-2 or 20B-1 eliminate cold-producing medium, then the amount of the cold-producing medium of another refrigerator 20B-2 or 20B-1 also just has been corrected.

And, in the present embodiment, to constitute the following formation of evaporimeter 21-1,21-2 separately of 2 refrigerator 20B-1,20B-2 of refrigerating plant: drum 37 zonings are become a plurality of (2), in the part of zoning, heat-transfer area (heat-transfer pipe) is set respectively; Simultaneously with the following formation of each condenser 25-1,25-2: drum 39 zonings are become a plurality of (2), in the part of zoning, heat-transfer area (heat-transfer pipe) is set respectively.If adopt such structure, can make the refrigerating plant densification.In addition, above-mentioned drum also can only be used for any one of evaporimeter 21-1,21-2 or condenser 25-1,25-2.

In addition, in above-mentioned the 3rd embodiment, though on power recovery decompressor 28-1,28-2 that a plurality of relatively (2) refrigerator 20B-1,20B-2 is provided with respectively, be connected with other generator (power recovery machine 281 shown in Figure 6) respectively, also can constitute a connection generator (power recovery machine) on a plurality of power recovery decompressor 28-1,28-2 and the structure of common generator.

Figure 18 is the structure chart of variation of the refrigerating plant of above-mentioned the 3rd embodiment.In the refrigerating plant shown in this figure, the part mark identical mark identical or suitable with the refrigerating plant of above-mentioned the 3rd embodiment.In addition, the item except that the item of following explanation is identical with the 3rd embodiment.The difference of refrigerating plant shown in this figure and above-mentioned the 3rd embodiment refrigerating plant is, in the both sides of a motor M 2 stage compressor 23-1,23-2 are set respectively, in constituting 2 refrigerator 20B-1,20B-2 of refrigerating plant, energy-saving appliance 31-1,31-2 are set respectively, between condenser 25-1,25-2 and energy-saving appliance 31-1, the 31-2 and the structure that is provided with power recovery decompressor 28-1,28-2 between energy-saving appliance 31-1,31-2 and evaporimeter 21-1, the 21-2 respectively.Also power recovery decompressor 28-1,28-2 can be set so multistagely, multistage formation power recovery circulation.In addition, the refrigerant amount that has omitted Figure 16 of being equivalent to above-mentioned the 3rd embodiment, the pipeline with open and close valve 35 33 shown in Figure 17 among Figure 18 is adjusted the record in loop.

Embodiments of the present invention more than have been described, but the present invention is not limited to above-mentioned embodiment, in the scope of the technological thought of the scope of claim and specification and accompanying drawing record, can carries out all distortion.In addition, even do not have Any shape, structure or the material of directly record in specification and the accompanying drawing, so long as play the present application and effect, all in the scope of the technological thought of the present application.For example, though above-mentioned embodiment constitutes a refrigerating plant with 2 refrigerators, also can constitute a refrigerating plant with many refrigerators more than 3.At this moment, cold water (fluid is cooled) is connected in series to be flowed in each evaporimeter of these many refrigerators, and cooling water (cooling fluid) is connected in series to be flowed in each condenser of above-mentioned many refrigerators.

And, though above-mentioned embodiment is taked the structure with 2 compressors of 2 refrigerators of a Motor Drive, but constituting with the refrigerator more than 3 under the situation of a refrigerating plant, also can be with the compressor of each refrigerator of Motor Drive more than 1 or 2.And, can certainly use refrigerator 20A shown in Figure 4 as the example of the employed refrigerator of refrigerating plant though the respective embodiments described above have illustrated with refrigerator shown in Figure 2 20 and refrigerator 20B shown in Figure 6.And, also can use the refrigerator of the structure beyond these refrigerators 20,20A, 20B.

And, though above-mentioned embodiment is taked the structure with 2 compressors of 2 refrigerators of a Motor Drive, but at picture motor is set as shown in Figure 7 in each compressor, load extremely reduces or produce under the situation of pressure oscillation, also can control the platform number of compressor.Promptly, utilize all heat transfer area efficient height of evaporimeter and condenser generally speaking, but under the significantly reduced situation of load efficient extremely little, compressor, the heat transfer area of reducing is arranged also, the refrigerant flow that increases average every compressor simultaneously is good situation.Also can carry out efficient and relatively come the console number by calculating.

Utilizability on the industry

The present invention can be used in cooling fluid (cooling sources such as cooling water, tempering air) and use the fluid that carries out sensible heat and change, the fluid that is cooled to use cold water or salt solution etc. to carry out the refrigerating plant of the fluid of sensible heat variation, especially can be used in the refrigerating plant with a plurality of refrigerators.

Claims (6)

1. a refrigerating plant is characterized in that,
Have a plurality of refrigerators, described refrigerator has: make the cold-producing medium evaporation and the evaporimeter of performance refrigeration from the absorption of fluids heat that is cooled, compress above-mentioned refrigerant vapour and make its compressor that becomes HCS, and cool off the condenser that HCS condenses it by cooling fluid;
The above-mentioned fluid that is cooled is connected with the evaporator series of above-mentioned a plurality of refrigerators, is cooled off by the heat of evaporation of the cold-producing medium of a plurality of evaporimeters successively;
The condenser of above-mentioned cooling fluid and above-mentioned a plurality of refrigerators is connected in series, and cools off the cold-producing medium of a plurality of condensers successively;
A plurality of compressors of above-mentioned a plurality of refrigerators are by same Motor Drive;
Between above-mentioned motor and the above-mentioned a plurality of compressor is labyrinth sealing;
Above-mentioned motor is a closed type, is in the cold-producing medium environment;
Adjust the loop by refrigerant amount between above-mentioned a plurality of refrigerator and connect, adjust the amount that the cold-producing medium of above-mentioned a plurality of refrigerators is adjusted in the loop by above-mentioned refrigerant amount.
2. refrigerating plant as claimed in claim 1 is characterized in that,
Above-mentioned refrigerant amount adjust the loop possess the condenser of a refrigerator that connects above-mentioned a plurality of refrigerators respectively and above-mentioned a plurality of refrigerators another refrigerator evaporimeter and have the pipeline of open and close valve;
Above-mentioned refrigerating plant constitutes the liquid level of measuring the cold-producing medium of any in above-mentioned a plurality of condensers and rises and detect superfluous cold-producing medium;
Also constitute and when detecting the cold-producing medium of above-mentioned surplus, open above-mentioned open and close valve.
3. refrigerating plant as claimed in claim 1 is characterized in that,
Evaporimeter to the above-mentioned a plurality of refrigerators of major general is arranged in each zoning after the drum zoning;
Perhaps the condenser with above-mentioned a plurality of refrigerators is arranged in each zoning after the drum zoning.
4. refrigerating plant as claimed in claim 2 is characterized in that,
Evaporimeter to the above-mentioned a plurality of refrigerators of major general is arranged in each zoning after the drum zoning;
Perhaps the condenser with above-mentioned a plurality of refrigerators is arranged in each zoning after the drum zoning.
5. as each described refrigerating plant in the claim 1~4, it is characterized in that,
Connecting on each condenser and the refrigerant tubing between the evaporimeter of above-mentioned a plurality of refrigerators, be provided with recovery flows to the energy that the cold-producing medium stream of evaporimeter had from condenser power recovery decompressor.
6. refrigerating plant as claimed in claim 5 is characterized in that, above-mentioned power recovery decompressor drives generator by the energy that cold-producing medium stream is had, thereby reclaims power.
CN2007800022390A 2006-01-10 2007-01-09 Refrigeration apparatus CN101371082B (en)

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JP2006002977A JP5096678B2 (en) 2006-01-10 2006-01-10 Refrigeration equipment
JP002977/2006 2006-01-10
PCT/JP2007/050372 WO2007080994A1 (en) 2006-01-10 2007-01-09 Refrigeration apparatus

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CN101371082B true CN101371082B (en) 2011-06-15

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WO2007080994A1 (en) 2007-07-19

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