CN101158530A - Ultra low temperature cool house - Google Patents
Ultra low temperature cool house Download PDFInfo
- Publication number
- CN101158530A CN101158530A CNA2007101142052A CN200710114205A CN101158530A CN 101158530 A CN101158530 A CN 101158530A CN A2007101142052 A CNA2007101142052 A CN A2007101142052A CN 200710114205 A CN200710114205 A CN 200710114205A CN 101158530 A CN101158530 A CN 101158530A
- Authority
- CN
- China
- Prior art keywords
- gas
- liquid
- ammonia
- communicated
- refrigerator
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Images
Landscapes
- Sorption Type Refrigeration Machines (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention relates to an ultra low temperature cold storage warehouse, which belongs to the technical field of the structure of the cold storage warehouse. The invention is characterized in that the ammonia is used as the refrigerants and a low-temperature evaporator, and a middle-low temperature evaporator are arranged in the preparatory room and the reservoir pool; the low-temperature evaporator is communicated with an air-liquid separating heat exchange air return regulating station, a freezer with a single engine and a low-pressure circulation barrel through an air return regulating station for ammonia, and the liquid of the low-pressure circulation barrel is communicated with the middle-low temperature evaporator and communicated back to the low-pressure circulation barrel through a liquid pump; the low-temperature evaporator enters the low-pressure circulation barrel 6 through a regulating station for ammonia liquid and the air-liquid separating heat exchange air return regulating station is connected with the low-temperature evaporator through the regulating station for ammonia liquid; the gas of the low-pressure circulation barrel is communicated with a freezer with double engines, to an intermediate cooler and communicated back to the freezer with double engines, and the gas of the freezer with double engines is communicated with an oil separator; the output end of the oil separator is communicated with an evaporative cooler and the air-liquid separating heat exchange air return regulating station, and the evaporative cooler is communicated to a liquid receiver for ammonia; the liquid receiver for ammonia is communicated with the air-liquid separating heat exchange air return regulating station, the low-temperature circulation barrel and the intermediate cooler.
Description
One, technical field
The present invention relates to a kind of ultra low temperature cool house, belong to the freezer technical field of structures.
Two, background technology
At present, being higher than-36 ℃ of refrigeration almost is to make cold-producing medium with ammonia, domestic-60 ℃ of tuna depots absolutely are to introduce by Japan is a complete set of, all be to adopt freon cascade refrigeration system, be to adopt R-22 and two kinds of refrigeration systems of R-23, disadvantage is that freon destroys atmospheric ozone layer, international and domesticly is about to stop to produce and uses.Still do not have the precedent of ammonia system ultralow temperature, make cold-producing medium, atmospheric ozone layer is not had destruction with ammonia.
Three, summary of the invention
The objective of the invention is to, provide a kind of cold-producing medium that atmospheric ozone layer is not had destruction, the depots temperature reaches-60 ℃, advanced and reasonable design, small investment, ultra low temperature cool house simple to operate.
Ultra low temperature cool house of the present invention, special character is, make cold-producing medium with ammonia, adopt double-chamber structure, the outside is a preparation room, the inside depots, depots is established cryogenic vaporizer 1, preparation room is established time cryogenic vaporizer 5, cryogenic vaporizer 1 output is communicated with gas-liquid separation heat exchanging gas-returning regulation station 3 through ammonia gas-returning regulation station 2 and carries out gas-liquid separation, gas-liquid separation heat exchanging gas-returning regulation station 3 outputs are communicated with unit refrigerator 4 and carry out the one-level compression exhaust, unit refrigerator 4 outputs connection low pressure recycle bucket 6 inputs make the hot ammonia gas after the compression enter the low pressure recycle bucket, low pressure recycle bucket 6 liquid outputs are communicated with time cryogenic vaporizer 5 inputs by liquid pump 12, sending the liquid ammonia of low pressure recycle bucket 6 separation back to time cryogenic vaporizer 5 freezes, inferior cryogenic vaporizer 5 outputs are communicated with low pressure recycle bucket 6 inputs, the compression after heat ammonia gas that the mixing gas-liquid that makes 5 outputs of time cryogenic vaporizer and unit refrigerator 4 the are exported cooling of meeting, enter low pressure recycle bucket 6, low pressure recycle bucket 6 is realized gas-liquid separation, and cryogenic vaporizer 1 hot ammonia defrosting returns liquid and advances low pressure recycle bucket 6 inputs by liquid adjusting station 8;
Gas-liquid separation heat exchanging gas-returning regulation station 3 outputs are also regulated station 8 by ammonia liquid and are communicated with cryogenic vaporizer 1, the ammonia liquid supply rate size that is used to regulate cryogenic vaporizer 1;
Low pressure recycle bucket 6 gas output ends are communicated with two-shipper refrigerator 7, gas after 6 separation of low pressure recycle bucket is carried out the secondary compression through two-shipper refrigerator 7, two-shipper refrigerator 7 is communicated to intercooler 9, discharge the high temperature ammonia and enter intercooler 9 coolings, cooled gas enters two-shipper refrigerator 7 again and carries out three grades of compressions, the gas output end of two-shipper refrigerator 7 is communicated to oil eliminator 13, cryogenic vaporizer 1 hot ammonia defrosting enters gas-liquid separation heat exchanging gas-returning regulation station 3 from oil eliminator 13 connections, enter cryogenic vaporizer 1 each road by gas-liquid separation heat exchanging gas-returning regulation station 3 connections, oil eliminator 13 outputs are communicated to devaporizer 10, devaporizer 10 outputs are communicated to ammonia liquid reservoir 11, make the high-temperature gas of discharge enter devaporizer 10, by liquefy ammonia after the gas cooled, liquid ammonia enters ammonia liquid reservoir 11;
Ammonia liquid reservoir 11 outputs are communicated with gas-liquid separation heat exchanging gas-returning regulation station 3, low pressure recycle bucket 6, intercooler 9 respectively.
Described freezer adopts double-chamber structure, the outside is a preparation room-29 ℃～-31 ℃, the inside depots-59 ℃～-61 ℃, the temperature difference-28 ℃～-32 ℃, the heat-insulation layer at ceiling and ground place around the depots, adopting thickness is the 400-600mm polyurethane, splits at-60 ℃ in order to prevent polyurethane, each spray polyurethane thickness 50mm sprays another layer again after cooling is shunk;
Described unit refrigerator 4, two-shipper refrigerator 7 formed a three tier structure compressibility, and two low temperature when reaching-60 ℃ and-30 ℃ adopt three tier structure cold, the first order is compressed refrigerator discharge hot ammonia cooling, through double-unit system cold compression cooling liquefy ammonia;
Described gas-liquid separation heat exchanging gas-returning regulation station 3 carries out gas-liquid separation, liquid R717 heat exchange, it is that low temperature R717 liquid is regulated the station that three functions of R717 gas regulation, liquid are regulated station 8, and cryogenic vaporizer 1 each road of furred ceiling comb is gone in the R717 distribution that gas-liquid separation heat exchanging gas-returning regulation station 3 comes out;
Described cryogenic vaporizer 1 adopts R717 furred ceiling comb, each layer furred ceiling comb is the two-way evaporation tube that the top is interlaced, be arranged in parallel, evaporation tube is a several layers according to designing the refrigerating capacity that needs evenly distributed, 2 times the number of plies is the comb way, each road is connected to ammonia liquid separately and regulates station 8, the ammonia liquid supply rate size that can regulate cryogenic vaporizer 1 each road furred ceiling comb separately;
Described gas-liquid separation heat exchanging gas-returning regulation station 3, inside is provided with bottom efficient heat-exchanging pipe 32, top efficient heat-exchanging pipe 40, the centre is between heat exchanger tube 39, the outside is come liquid pipe 37, is gone to R717 liquid adjusting station pipe 38 and cryogenic vaporizer 1, unit refrigerator 4, ammonia liquid reservoir 11, ammonia liquid adjusting station 8 to be communicated with by 60 ℃ of evaporimeter mufflers 31, unit refrigerator air intake duct 36, ammonia liquid reservoir respectively, is fixed by stationary barrier 33, end socket 34, set bolt 35, dividing plate 41;
Fabrication and installation gas-liquid separation heat exchanging gas-returning regulation station 3, low temperature liquid ammonia enters in the refrigeration seamless steel pipe furred ceiling comb of-60 ℃ of depots,-60 ℃ of furred ceiling combs are totally 4 floor 8 road feed liquor ammonia, through certain stroke, the heat absorption evaporation reaches terminal point, and air inlet liquid separation heat exchanging gas-returning regulation station 3 becomes 95% above gaseous ammonia by liquid ammonia evaporates, absorb heat in the storehouse, reduce storehouse temperature;-60 ℃ of depots come out low temperature ammonia and small amount of drop enter between the gas-liquid separation heat exchanging organ pipe 39, because volume increases, gas flow rate slows down, and entrained drip separates and drops on gas-liquid separation heat exchanging gas-returning regulation station 3 bottoms in the gas ammonia;
Come liquid ammonia to enter in the bottom efficient heat-exchanging pipe 32 from ammonia liquid reservoir 11 through managing 37, drop to gas-liquid separation heat exchanging device lower liquid ammonia, evaporate at absolute pressure 0.18-0.15MPa, liquid ammonia obtains cooling in the heat exchanger tube 32, cooling back liquid ammonia enters again in the top efficient heat-exchanging pipe 40, enter between heat exchanger tube 39 from come out cryogenic gas and small amount of drop of-60 ℃ of depots, lower the temperature for again efficient heat-exchanging pipe 40 interior liquid ammonias again, through cooling, low temperature liquid ammonia enters liquid ammonia adjusting station 8 from managing 38, be assigned to-60 ℃ of each Lu Guanzhong of furred ceiling comb, evaporative cooling absorbs heat; Not only lowered the temperature heat exchange but also play gas-liquid separation and the effect of gas-returning regulation station of gas-liquid separation heat exchanging gas-returning regulation station 3 guarantees that one-level compression refrigerator normally moves.
Described intercooler 9 carries out secondary heat of compression R717 gas cooled, devaporizer 10 becomes liquid with three grades of compression R717 gas cooled, low pressure recycle bucket 6 is realized one-level heat of compression R717 gas cooled and preparation room time cryogenic vaporizer 5 furred ceiling comb gas-liquid separations, liquid pump 12 security reserve chamber furred ceiling comb liquid R717 normal circulation refrigeration;
Described-60 ℃/-30 ℃ electric thermal insulating storehouse doors comprise-60 ℃ of electronic cold-storage doors of depots ,-30 ℃ of electronic cold-storage doors of preparation room, and two cold-storage doors another door when passing in and out any one is in closed condition;-60 ℃ of electronic cold-storage door major functions of depots are visual plants of-60 ℃ of depots of turnover, are that-60 ℃ of depots colds of assurance are not gone in the preparation room, pass in and out-60 ℃ of depots and close the door at any time, reduce loss of refrigeration capacity.-30 ℃ of electronic cold-storage doors of preparation room, it is-30 ℃ of preparation room visual plants of turnover, major function is that-30 ℃ of preparation room colds of assurance are not gone in the outdoor environment, reduces loss of refrigeration capacity.Want into-60 must to open-30 ℃ of preparation room Electrically operated gate earlier in ℃ depots, close the door after entering preparation room, open-60 ℃ of depots Electrically operated gate again, enter and close the door.Open earlier when coming out-60 ℃ of depots and close the door after-60 ℃ of Electrically operated gate are come out, open-30 ℃ of Electrically operated gate again and come out to close the door.Have only by-60 ℃ of depots of this program turnover, loss of refrigeration capacity is little, has saved electricity consumption.
The middle part of described oil eliminator 13 is provided with air inlet 21, top is provided with the gas outlet 22 that the high-temperature gas ammonia after separating is fed devaporizer 10, be provided with the stainless steel cloth 23 that intercepts vaporific oil droplet in the gaseous ammonia between air inlet 21 and the gas outlet 22, the bottom is provided with the fuel outlet 24 that the oil that separates is emitted; Separation principle is as follows: three grades of compression high-temperature gas ammonia enter oil eliminator 13 from air inlet 21, because the separator volume is big, gas flow rate slows down, carry vaporific oil droplet in the gaseous ammonia secretly and enter stainless steel cloth 23, just separate through vaporific oil droplet in the stainless (steel) wire obstruct gaseous ammonia, drop on the oil eliminator bottom, reach the separating oil effect, the oil that separates is emitted from fuel outlet 24, and the high-temperature gas ammonia after the separation 22 enters devaporizer from the gas outlet.
Ultra low temperature cool house of the present invention, the R717 cold-producing medium of employing does not have destruction to atmospheric ozone layer, and the depots temperature reaches-60 ℃, and structural design is rationally advanced, small investment, simple to operate, storehouse temperature is steady, and temperature fluctuation in storehouse is little, drying loss is little, makes simply, and maintenance does not need repairing; Three grades of compression process solved refrigerator efficient under evaporating temperature-70 ℃ operating mode low, storage vault can't be reduced to a difficult problem of-60 ℃ at all.
Four, description of drawings
Fig. 1: oil eliminator 13 structural representations;
Fig. 2: cryogenic vaporizer 1, inferior cryogenic vaporizer 5 distribution schematic diagrams that the freezer double-chamber structure adopts;
The vertical view of Fig. 3: Fig. 2;
The A-A cutaway view of Fig. 4: Fig. 2;
Fig. 5: cryogenic vaporizer 1 distribution front view;
The vertical view of Fig. 6: Fig. 5;
Fig. 7: gas-liquid separation heat exchanging gas-returning regulation station 3 structural representations;
Fig. 8: embodiment of the invention ultra low temperature cool house structural representation.
Among the figure, cryogenic vaporizer 1, ammonia gas-returning regulation station 2, gas-liquid separation heat exchanging gas-returning regulation station 3, unit refrigerator 4, inferior cryogenic vaporizer 5, low pressure recycle bucket 6, two-shipper refrigerator 7, ammonia liquid is regulated station 8, intercooler 9, devaporizer 10, ammonia liquid reservoir 11, liquid pump 12, oil eliminator 13, air inlet 21, gas outlet 22, stainless steel cloth 23, fuel outlet 24,-60 ℃ of evaporimeter mufflers 31, bottom efficient heat-exchanging pipe 32, stationary barrier 33, end socket 34, set bolt 35, unit refrigerator air intake duct 36, the ammonia liquid reservoir comes liquid pipe 37, go R717 liquid to regulate station pipe 38, between heat exchanger tube 39, top efficient heat-exchanging pipe 40, dividing plate 41.
Five, the specific embodiment
Following with reference to accompanying drawing, provide the specific embodiment of the present invention, be used for formation of the present invention is further specified.
Embodiment
Tuna storehouse temperature is divided three kinds in the world :-50 ℃ ,-55 ℃ ,-60 ℃, by international most advanced tuna storehouse temperature is-60 ℃ of development depots, adopt the cold-producing medium of R717 as-60 ℃ of tuna depots, the heat-insulation layer that ceiling and ground are located around-60 ℃ of tuna depots, adopting thickness is the 450mm polyurethane, in order to prevent that polyurethane from splitting at-60 degree, spray polyurethane thickness 50mm at every turn, after shrinking, cooling sprays another layer again; It is preparation room-30 ℃ that freezer adopts double-chamber structure, outside, the inside depots-60 ℃, the temperature difference-30 ℃.
(1)-60 ℃ working medium (ammonia) furred ceiling comb
Adopt the R717 refrigeration system, reach-60 ℃ of low tempertaure storage effects.We design-60 ℃ of furred ceiling combs, have changed traditional manufacturing technique, trans D 38 * 2.5 seamless steel pipe spacing 110mm, and longitudinal pitch 138mm, each road evaporating pan pipe range 200m, top advances liquid ammonia, the terminal gaseous ammonia that becomes of heat absorption evaporation.Furred ceiling comb totally 8 tunnel, ￠ 38 * 2.5 seamless steel pipe 1600m ,-60 ℃ of depots areas are 1: 2.90 with-60 ℃ of furred ceiling comb heat exchange area ratios.
See Fig. 6, low temperature liquid ammonia enters in the special-purpose seamless steel pipe of ￠ 38 * 2.5 (mm) refrigeration from A, B two ends, and-60 ℃ of furred ceiling combs totally 4 floor 8 tunnel advance liquid ammonia, and each road is through 200m stroke, and the heat absorption evaporation reaches terminal point C, D.One group of-60 ℃ of furred ceiling comb are totally 4 floor 8 tunnel air inlet liquid separation heat exchanging gas-returning regulation station, become gaseous ammonia more than 95% by liquid ammonia evaporates, absorb heat in the storehouse, the reduction storehouse temperature.
(2) gas-liquid separation heat exchanging gas-returning regulation station
See Fig. 7,3 ,-60 ℃ of depots of fabrication and installation diameter 273mm gas-liquid separation heat exchanging gas-returning regulation station come out low temperature ammonia and small amount of drop, enter between the gas-liquid separation heat exchanging organ pipe 39, because volume increases, gas flow rate slows down, and entrained drip separates and drops on gas-liquid separation heat exchanging device bottom in the gas ammonia.
Come liquid ammonia to enter in the efficient heat-exchanging pipe 32 Lower Half pipes from ammonia liquid reservoir 11 through managing 37, drop to gas-liquid separation heat exchanging device lower liquid ammonia, evaporate at absolute pressure 0.18-0.15MPa, liquid ammonia obtains cooling in the heat exchanger tube 32, cooling back liquid ammonia enters again in the first half efficient heat-exchanging pipe 40, enter between heat exchanger tube from come out cryogenic gas and small amount of drop of-60 ℃ of depots, lower the temperature for again efficient heat-exchanging pipe 40 interior liquid ammonias again, through cooling, low temperature liquid ammonia enters R717 liquid adjusting station 8 from managing 38, be assigned to-60 ℃ of each Lu Guanzhong of furred ceiling comb, evaporative cooling absorbs heat.The effect of gas-liquid separation and gas-returning regulation station is played in the gas-liquid separation heat exchanging gas-returning regulation station heat exchange of promptly lowering the temperature again, guarantees that one-level compression refrigerator normally moves.
(3) three grades of compression refrigerations
Three tier structure is cold to be with a single-unit cold compressor and a double-unit system cold compressor, finish-60 ℃ and-30 ℃ of two storehouse temperature, in fact be exactly that a single-unit cold compressor is freezed to-60 ℃, because in evaporating temperature-70 ℃, in evaporation absolute pressure 0.18-0.15MPa (the vacuum gauge pressure 0.082-0.085MPa) scope, the refrigerator capacity is little, delivery temperature is low, discharge gas and enter the low pressure recycle bucket, the advantages outweigh the disadvantages to the two-shipper refrigeration machine, it is low particularly to remedy two-shipper compressor secondary admission pressure summer, insurmountable problem, and improve the double-unit system cold.Because preparation room temperature-30 ℃, present just arbitrarily downgrade volume proportioning 1: 3 of refrigerator, can't change refrigerator, but the gases that we discharge-60 ℃ of refrigeration system units, add to the air inlet of two-shipper refrigerator one-level, we improve two-shipper one-level pressure of inspiration(Pi), improve simultaneously two-shipper secondary pressure of inspiration(Pi) again, reduce compression ratio, two-shipper secondary delivery temperature descends significantly, refrigerating capacity also just improves, power consumption also just lowers, and the double-unit system cold compressor operates in the ideal technology scope, and three tier structure is cold to organically combine with-30 ℃ of two warm areas-60 ℃, have complementary advantages, have more novelty.
The cold China that solved of three tier structure makes refrigerator under evaporating temperature-70 ℃ operating mode, the tuna storage vault can't be reduced to a difficult problem of-60 ℃ at all, the breakthrough of this difficult problem provides opportunity for China refrigerator manufacturing enterprise enters-60 ℃ of tuna storage vault refrigerating fields.
(4) cold-producing medium R717
Initiative is utilized cold-producing medium R717 at home, and with-60 ℃ of tuna depots coolings, freon cascade refrigeration device is mostly adopted in inexpensive cold-producing medium R717 refrigeration system replacement in the world, small investment, universal wide, substitute import, the feature of environmental protection is good, fills the domestic gaps.
-60 ℃ of depots refrigeration principles:
Liquefied ammonia becomes gaseous ammonia by heat in the liquid state attraction storehouse in-60 ℃ of furred ceiling combs, reduce storehouse temperature, gaseous ammonia is through the ammonia gas-returning regulation station, enter gas-liquid separation heat exchanging gas-returning regulation station, band liquid ammonia in the gas is separated, liquid ammonia evaporates is again with liquefied ammonia cooling in the gas-liquid separation organ pipe, reduce the temperature that enters storehouse-60 ℃ furred ceiling comb ammoniacal liquor, gaseous ammonia enters unit (one-level) refrigeration compressor, evaporation absolute pressure 0.18～0.15MPa (vacuum meter gauge pressure 0.082～0.085 MPa), through unit compressor one-level compression exhaust (gauge pressure)-0.01～0.01Mpa, compression after heat ammonia gas enters low pressure recycle bucket 6, meet cooling with preparation room (30 ℃) furred ceiling comb output gaseous mixture liquid phase, gas-liquid is separated back gas through 7 compressions of two-shipper refrigerator at low pressure recycle bucket 6, and liquid ammonia is sent preparation room (30 ℃) furred ceiling comb refrigeration again back to by liquid pump 12; Two-shipper refrigerator 7 is discharged the high temperature ammonia and is entered intercooler 9 coolings, gas enters two-shipper refrigerator 7 again and carries out three grades of compressions, the high-temperature gas of discharging enters oil eliminator, the refrigerator oil of carrying secretly in the gaseous ammonia is separated, high-temperature gas ammonia enters devaporizer 10 again, by liquefy ammonia after the gas cooled, liquid ammonia enters ammonia liquid reservoir 11; Come out to enter in the gas-liquid separation heat exchanging gas-returning regulation station 3 from the ammonia liquid reservoir, enter-60 ℃ of tuna furred ceiling combs, whole process of refrigerastion is finished by a unit and a double-unit system cold compressor, key is that the air-breathing gauge pressure of two-shipper compressor one-level is controlled in-0.01～0.01 MPa scope, can improve single-unit cold compressor efficient like this.
Important technological parameters and specification
| Parameter name | Technical parameter |
| Go into the goods amount | 8000kg/ day (shedding cargo temperature-35 ℃) |
| Furred ceiling comb evaporating pressure (absolute pressure) | 0.18～0.15MPa |
| One-level pressure at expulsion (gauge pressure) | -0.01～0.01MPa |
| Secondary pressure at expulsion (gauge pressure) | 0.2～0.3MPa |
| Three grades of pressures at expulsion (gauge pressure) | 1.5MPa below |
| Tuna depots temperature | -60℃±1 |
| The preparation room temperature | -30℃±1 |
| Evaporating temperature | -70℃ |
| Condensing mode | Water |
| Cold-producing medium | R717 |
| -60 ℃ of depots heat-insulation layers | 450mm |
| -30 ℃ of depots heat-insulation layers | 180mm |
| Power supply | 380V*50Hz |
Embodiment of the invention ultra low temperature cool house has following technical characterstic:
1, cryogenic vaporizer 1 furred ceiling comb, easy implementation rational in infrastructure, swept once frost in artificial per 30 days, annual hot gas R717 melts once frost, and storehouse temperature is steady, the Ku Wen fluctuation is little, one-60 ℃ constant temperature just, drying loss is little, makes simple, absolutely adopt domestic raw materials, maintenance does not need repairing; And introduce-60 ℃ of cascade refrigeration devices by Japan, and every day, the furred ceiling air-cooler needed molten white 45 minutes of electricity, and temperature raises about 10 ℃, and the storehouse temperature changes greatly, and drying loss is big; This cover-60 ℃ working medium R717 refrigeration process is fit to build large, medium and small various-60 ℃ of tunas and similar provisions storeroom;
2 ,-60 ℃ working medium (ammonia) gas-liquid separation heat exchanging gas-returning regulation station 3, it is gas-liquid separator, liquid R717 heat exchanger, R717 gas regulation station, the shortcoming that volume is little, efficient is high, three kinds of equipment of solution are huge, easy for installation simple, save a large amount of raw material, reduce cost, improve the market competitiveness;
3, three grades of compression process: solved China and made refrigerator under evaporating temperature-70 ℃ operating mode, the tuna storage vault can't be reduced to a difficult problem of-60 ℃ at all, this difficult problem breaks through, provide opportunity for China refrigerator manufacturing enterprise enters-60 ℃ of tuna storage vault refrigeration plants, three grades of compression process have reached two effects (60 ℃ and-30 ℃);
4, finish to monopolize China-60 ℃ tuna storage vault refrigeration plant market by Japan, three grades of compression refrigeration technologies combine with-60 ℃ of working medium (ammonia) furred ceiling comb, electricity consumption is little, a 4AV-12.5 refrigeration compressor, do not stop in service at 24 hours, under the evaporating temperature-70 ℃ operating mode, one-level compression refrigeration power consumption less than 190 watts thousand hours.
Claims (10)
1. ultra low temperature cool house, be characterised in that, make cold-producing medium with ammonia, adopt double-chamber structure, the outside is a preparation room, the inside depots, depots is established cryogenic vaporizer (1), preparation room is established time cryogenic vaporizer (5), cryogenic vaporizer (1) output is communicated with gas-liquid separation heat exchanging gas-returning regulation station (3) through ammonia gas-returning regulation station (2), gas-liquid separation heat exchanging gas-returning regulation station (3) output is communicated with unit refrigerator (4), unit refrigerator (4) output is communicated with low pressure recycle bucket (6) input, low pressure recycle bucket (6) liquid output is communicated with time cryogenic vaporizer (5) input by liquid pump (12), and inferior cryogenic vaporizer (5) output is communicated with low pressure recycle bucket (6) input, and cryogenic vaporizer (1) hot ammonia defrosting returns liquid and advances low pressure recycle bucket (6) input by liquid adjusting station (8);
Gas-liquid separation heat exchanging gas-returning regulation station (3) output is regulated station (8) by ammonia liquid and is communicated with cryogenic vaporizer (1);
Low pressure recycle bucket (6) gas output end is communicated with two-shipper refrigerator (7), two-shipper refrigerator (7) is communicated to intercooler (9), discharge the high temperature ammonia and enter intercooler (9) cooling, intercooler (9) is communicated with back two-shipper refrigerator (7) again, the gas output end of two-shipper refrigerator (7) is communicated with oil eliminator (13), oil eliminator (13) is communicated with gas-liquid separation heat exchanging gas-returning regulation station (3), oil eliminator (13) output is communicated to devaporizer (10), and devaporizer (10) output is communicated to ammonia liquid reservoir (11);
Ammonia liquid reservoir (11) output is communicated with gas-liquid separation heat exchanging gas-returning regulation station (3), low pressure recycle bucket (6), intercooler (9) respectively.
2. according to the described ultra low temperature cool house of claim 1, it is characterized in that described freezer adopts double-chamber structure, the outside is a preparation room-29 ℃～-31 ℃, the inside depots-59 ℃～-61 ℃, the temperature difference-28 ℃～-32 ℃, the heat-insulation layer that ceiling and ground are located around the depots, adopting thickness is the 400-600mm polyurethane,-30 ℃ of preparation room insulation layer thickness 180mm spray polyurethane thickness 50mm at every turn, spray another layer after cooling is shunk again.
3. according to the described ultra low temperature cool house of claim 1, it is characterized in that described unit refrigerator (4), three tier structure cold compression system of two-shipper refrigerator (7) composition, the employing three tier structure is cold, the first order is compressed refrigerator discharge the cooling of hot gaseous ammonia, through double-unit system cold compression cooling liquefy ammonia, a unit and a two-shipper have been formed a three tier structure cooling system, have finished-60 ℃ and-30 ℃ of two warm areas.
4. according to the described ultra low temperature cool house of claim 1, it is characterized in that described gas-liquid separation heat exchanging gas-returning regulation station (3) carries out gas-liquid separation, liquid R717 heat exchange, three functions of R717 gas regulation, it is that low temperature R717 liquid is regulated the station that liquid is regulated station (8), and each road of cryogenic vaporizer (1) furred ceiling comb is gone in the R717 distribution that gas-liquid separation heat exchanging gas-returning regulation station (3) comes out.
5. according to the described ultra low temperature cool house of claim 1, it is characterized in that described cryogenic vaporizer (1) adopts R717 furred ceiling comb, each layer furred ceiling comb is the two-way evaporation tube that the top is interlaced, be arranged in parallel, evaporation tube is a several layers according to designing the refrigerating capacity that needs evenly distributed, 2 times the number of plies is the comb way, and each road is connected to ammonia liquid separately and regulates station (8).
6. according to the described ultra low temperature cool house of claim 5, its feature is as follows: described gas-liquid separation heat exchanging gas-returning regulation station (3), inside is provided with bottom efficient heat-exchanging pipe (32), top efficient heat-exchanging pipe (40), between the tube and tube (39) between heat exchanger tube, the outside is respectively by-60 ℃ of evaporimeter mufflers (31), unit refrigerator air intake duct (36), the ammonia liquid reservoir comes liquid pipe (37), go R717 liquid to regulate station pipe (38) and cryogenic vaporizer (1), unit refrigerator (4), ammonia liquid reservoir (11), ammonia liquid is regulated station (8) and is communicated with, by stationary barrier (33), end socket (34), set bolt (35), dividing plate (41) is fixing.
7. according to the described ultra low temperature cool house of claim 1, it is characterized in that described intercooler (9) carries out secondary heat of compression R717 gas cooled, devaporizer (10) becomes liquid with three grades of compression R717 gas cooled, low pressure recycle bucket (6) is realized one-level heat of compression R717 gas cooled and preparation room time cryogenic vaporizer (5) furred ceiling comb gas-liquid separation, liquid pump (12) security reserve chamber furred ceiling comb liquid R717 normal circulation refrigeration.
8. according to the described ultra low temperature cool house of claim 1, it is characterized in that described-60 ℃/-30 ℃ electric thermal insulating storehouse doors, comprise-60 ℃ of electronic cold-storage doors of depots ,-30 ℃ of electronic cold-storage doors of preparation room, two cold-storage doors another door when passing in and out any one is in closed condition.
9. according to the described ultra low temperature cool house of claim 1, its feature is as follows: the middle part of described oil eliminator (13) is provided with air inlet (21), top is provided with the gas outlet (22) that the high-temperature gas ammonia after separating is fed devaporizer (10), be provided with the stainless steel cloth (23) that intercepts vaporific oil droplet in the gaseous ammonia between air inlet (21) and gas outlet (22), the bottom is provided with the fuel outlet (24) that the oil that separates is emitted.
10. according to the described ultra low temperature cool house of claim 1, it is characterized in that first order compression refrigeration with a unit refrigerator, evaporating temperature-70 ℃, evaporating pressure is between absolute pressure 0.18～0.15MPa, i.e. vacuum gauge pressure 0.082～0.085MPa; The second level and third level compression refrigeration, by freezing finishing of two-shipper refrigerator compression, the first order is compressed refrigerator discharge hot ammonia cooling, ammonia by gaseous state cools off liquefy ammonia through the two-shipper compression, first order compressor compresses exhaust gauge pressure-0.01～0.01Mpa, promptly the air-breathing gauge pressure of two-shipper compressor one-level is in-0.01～0.01 MPa scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101142052A CN100538224C (en) | 2007-10-31 | 2007-10-31 | Ultra low temperature cool house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101142052A CN100538224C (en) | 2007-10-31 | 2007-10-31 | Ultra low temperature cool house |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101158530A true CN101158530A (en) | 2008-04-09 |
| CN100538224C CN100538224C (en) | 2009-09-09 |
Family
ID=39306700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101142052A Active CN100538224C (en) | 2007-10-31 | 2007-10-31 | Ultra low temperature cool house |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100538224C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032742A (en) * | 2010-12-13 | 2011-04-27 | 河南工业大学 | Ammonia refrigeration-based large-scale automatic high and low temperature cold store |
| CN103486802A (en) * | 2013-08-12 | 2014-01-01 | 安徽省西商食品有限公司 | Novel cold storage and refrigerating process thereof |
| CN104792052A (en) * | 2015-04-29 | 2015-07-22 | 上海海洋大学 | Novel ultralow-temperature compression refrigerating system |
| CN105004089A (en) * | 2015-07-31 | 2015-10-28 | 广东申菱空调设备有限公司 | Cascaded unit used for both medium-high temperature cold storage house and low temperature cold storage house |
| CN107228520A (en) * | 2016-03-25 | 2017-10-03 | 松下知识产权经营株式会社 | Refrigerating plant |
| CN108799837A (en) * | 2018-06-04 | 2018-11-13 | 北京中冷高科制冷设备有限公司 | A kind of remodeling method of liquefied ammonia refrigeration freezer |
-
2007
- 2007-10-31 CN CNB2007101142052A patent/CN100538224C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032742A (en) * | 2010-12-13 | 2011-04-27 | 河南工业大学 | Ammonia refrigeration-based large-scale automatic high and low temperature cold store |
| CN102032742B (en) * | 2010-12-13 | 2012-10-17 | 河南工业大学 | Ammonia refrigeration-based large-scale automatic high and low temperature cold store |
| CN103486802A (en) * | 2013-08-12 | 2014-01-01 | 安徽省西商食品有限公司 | Novel cold storage and refrigerating process thereof |
| CN104792052A (en) * | 2015-04-29 | 2015-07-22 | 上海海洋大学 | Novel ultralow-temperature compression refrigerating system |
| CN105004089A (en) * | 2015-07-31 | 2015-10-28 | 广东申菱空调设备有限公司 | Cascaded unit used for both medium-high temperature cold storage house and low temperature cold storage house |
| CN107228520A (en) * | 2016-03-25 | 2017-10-03 | 松下知识产权经营株式会社 | Refrigerating plant |
| CN108799837A (en) * | 2018-06-04 | 2018-11-13 | 北京中冷高科制冷设备有限公司 | A kind of remodeling method of liquefied ammonia refrigeration freezer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100538224C (en) | 2009-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100538224C (en) | Ultra low temperature cool house | |
| CN105640164B (en) | A kind of cold fresh showcase of ice storage | |
| CN105135725B (en) | A kind of single compressor the two-stage dynamic refrigeration and cold accumulation air-conditioning system and its refrigerating method | |
| CN103148629A (en) | Gas-liquid phase ejector synergy refrigeration system for double temperature direct cooling-type refrigerator | |
| CN206695421U (en) | LNG cold energy refrigerating circulatory devices | |
| CN108266915A (en) | It is a kind of to use single working medium CO2Make the cascade refrigeration system of refrigerant | |
| CN110160301A (en) | A kind of artificial ice stadium system of carbon dioxide refrigeration working medium | |
| CN105004088A (en) | Cascaded water chilling unit for dual purposes of intermediate temperature and low temperature | |
| CN113405303B (en) | Refrigerator refrigerating system and refrigerator comprising same | |
| CN106839486A (en) | LNG cold energy cooling cycle systems | |
| CN100572993C (en) | Gas-liquid separation heat exchanging gas-returning regulation station | |
| CN201255554Y (en) | Gas-liquid separation heat exchange and air return regulation station | |
| CN208012139U (en) | A kind of cascade refrigeration system for making refrigerant using single working medium CO2 | |
| CN208332729U (en) | Recycle the one machine dual temperature refrigeration system of second level injection of expansion work | |
| CN215882083U (en) | Four-stage throttling precooling concrete production system | |
| CN214841826U (en) | Double-effect integrated refrigerating unit with natural cooling function | |
| CN113418312B (en) | Injection enthalpy-increasing evaporative cooling type air-cooled heat pump unit | |
| CN109059327A (en) | A kind of device and method making superposition type Cryo Refrigerator long-period stable operation | |
| CN102445016A (en) | Method for preparing large-temperature difference chilled water in single machine two-stage compression manner and special water chilling unit | |
| CN209084968U (en) | The cooling more warm water coolers of half forced evaporation and its air-conditioning device | |
| CN102901294A (en) | Frozen steam type ice slurry preparation system by air cycle refrigeration | |
| CN106288657A (en) | Liquid oxygen, liquid nitrogen exchange process units and production technology | |
| CN208871895U (en) | Not exclusively cooling refrigeration system among second throttle | |
| CN103148625A (en) | Mixed refrigerant throttling cycling low-temperature refrigerating machine with cold storage device | |
| CN2763754Y (en) | Refrigerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |