CN104792052B - Novel ultralow-temperature compression refrigerating system - Google Patents
Novel ultralow-temperature compression refrigerating system Download PDFInfo
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- CN104792052B CN104792052B CN201510208744.7A CN201510208744A CN104792052B CN 104792052 B CN104792052 B CN 104792052B CN 201510208744 A CN201510208744 A CN 201510208744A CN 104792052 B CN104792052 B CN 104792052B
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- 238000007906 compression Methods 0.000 title claims abstract description 99
- 230000006835 compression Effects 0.000 title claims abstract description 98
- 238000001035 drying Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 239000006200 vaporizer Substances 0.000 claims description 25
- 238000001914 filtration Methods 0.000 claims description 11
- 238000005057 refrigeration Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 27
- 239000003507 refrigerant Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 4
- 239000010721 machine oil Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 241000239366 Euphausiacea Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/26—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for frozen goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Compressor (AREA)
Abstract
Provided is a novel ultralow-temperature compression refrigerating system. A primary-throttling intermediate-incomplete-cooling one-machine double-stage compression refrigerating system is composed of a one-machine double-stage compressor, a first oil separator, a second oil separator, a mechanical filter, a marine condenser, an intermediate cooler, a first throttling device, a second throttling device, a drying cooler, an evaporator and a gas-liquid separator, and a single-stage compressor is arranged between the one-machine double-stage compressor and the evaporator in series. The novel ultralow-temperature compression refrigerating system mainly solves the problems that the marine one-machine double-stage compression refrigerating system has an overlarge compression ratio under an ultralow-temperature refrigeration working condition, and the double-stage compressor is in a full-load operation condition or even an overload operation condition for a long period. According to the technical scheme, the single-stage compressor is arranged between the one-machine double-stage compressor and the evaporator in series, so the compression ratio when the one-machine double-stage compressor works to achieve ultralow temperature is reduced, and the use efficiency of the compressors is improved; in addition, the system saves more energy in the operation process.
Description
Technical field
The invention belongs to freeze and low temperature field, it is related to a kind of Novel ultralow-temperature compression refrigerating system, more particularly to it is a kind of
Three stage compression super low temperature refrigeration system peculiar to vessel.
Background technology
In deep-sea fishing operation process, most precious catches are required to low temperature even Ultro-low temperature freezing and protect
Fresh, such as Antarctic krill is freezed using -40 DEG C, -35 DEG C of cold preservations；Tuna is freezed using -55 DEG C, -50 DEG C of cold preservation etc..In order to more preferable
Preservation catches quality, producing ultra-low temperature surroundings becomes one of necessary requirement of ocean fishing vessel.
At present, being commonly used to produce the refrigeration system of ultra-low temperature surroundings has two kinds：Double-stage compressive refrigerating system and overlapping compress
Refrigeration system.In theory, the low temperature range that overlapping compression refrigerating system can be produced is low very compared with for double-stage compressive refrigerating system
It is many, but the cold-producing medium of overlapping compression refrigerating system employing is generally by 2 kinds or two or more boiling point differs larger cold-producing medium mixing, mixes
The change of the component ratio and composition of closing cold-producing medium will directly affect the runnability of system, thus overlapping compression refrigerating system
Very sensitive for the leakage of cold-producing medium, in a prior art situation, overlapping compression refrigerating system is waving ring residing for fishing boat
Also there are problems when running under border, thus most of fishing boats typically adopt at present double-stage compressive refrigerating system.It is single in theory
Machine double-stage compressive refrigerating system can produce -60 DEG C of low temperature, but under the worst cold case, because whole system only uses one
Compressor, thus the high and low compression ratio arbitrarily downgraded of single machine compression with double stage refrigeration system is very big so that compressor is often at full capacity
Or even overload operation state, this not only can be impacted to the service life of compressor, while single machine compression with double stage refrigeration system
The refrigeration of system also can have a greatly reduced quality.
The content of the invention
The present invention proposes a kind of new three stage compression refrigeration ultra-low temperature systems for the deficiencies in the prior art and defect, leads to
The method for crossing a single-stage compressor of connecting in single machine compression with double stage refrigeration system, system operation more energy-conservation, and ensureing
While refrigeration, the compression ratio of system double-stage compressor is reduced, protect the effect of compressor.
In order to solve problem above, the technical solution used in the present invention is：A kind of Novel ultralow-temperature compression refrigerating system, bag
Include single-stage compressor, the first oil eliminator, mechanical filter, single machine compression with double stage machine, the second oil eliminator, peculiar to vessel separating of oil
Device, first throttle device, intercooler, drying cooling device, second throttling device, vaporizer, gas-liquid separator, its feature exists
In：Described single-stage compressor between single machine compression with double stage machine and vaporizer, single-stage compressor and single machine compression with double stage machine it
Between be provided with mechanical filter；The outlet of described single-stage compressor is connected with the first oil eliminator entrance；First oil eliminator
Outlet is connected with the entrance of mechanical filter；The low-pressure stage air entry phase of the outlet of mechanical filter and single machine compression with double stage machine
Even；The outlet of single machine compression with double stage machine is connected with the second oil eliminator entrance；The outlet of the second oil eliminator and marine condenser
Entrance is connected；The outlet of marine condenser point two-way, enters intercooler, separately after the first throttle device throttling described in all the way
It is connected with the entrance of device for drying and filtering after exchanging heat with intercooler all the way；The outlet of intercooler and single machine compression with double stage machine
Hiigh pressure stage air entry be connected；The outlet of drying cooling device is connected with second throttling device entrance；The outlet of second throttling device
It is connected with the entrance of vaporizer；The outlet of vaporizer is connected with gas-liquid separator entrance；The outlet of gas-liquid separator and single-stage pressure
The air entry of contracting machine is connected.
Single-stage compressor and single machine compression with double stage machine are piston compressor.
First, second oil eliminator except with by lubricating oil function detached with refrigerant vapour, while also with to
The function of compressor oil-supplying, effectively reduces the loss of compressor lubricant oil, it is ensured that the normal operation of compressor.
First throttle device, second throttling device are electric expansion valve, more accurate in terms of the degree of superheat of regulating system, can
With effective lift system operational efficiency.
Intercooler is plate type heat exchanger, and heat transfer effect is more preferable, and heat exchange area is less, is suitable for being made on fishing boat
With.
Mechanical filter is pneumatic filter, plays a part of to be filtered for single machine compression with double stage machine air-breathing.
Compared with prior art, the invention has the beneficial effects as follows：
In a kind of Novel ultralow-temperature compression refrigerating system of the present invention, connect between single machine compression with double stage machine and vaporizer
One single-stage compressor is set, and this not only effectively reduces the high and low compression ratio arbitrarily downgraded of single machine compression with double stage machine, prevents list
The prolonged overload operation of machine double-stage compressor, and at the same conditions compressor entirety wasted work is less.
Description of the drawings
Fig. 1 is a kind of Novel ultralow-temperature compression refrigerating system of the present invention（Band regenerator）Schematic diagram；
Fig. 2 is a kind of schematic diagram of Novel ultralow-temperature compression refrigerating system of the present invention；
Fig. 3 is a kind of Novel ultralow-temperature compression refrigerating system of the present invention（Band regenerator）Pressure-enthalpy chart；
Fig. 4 is a kind of pressure-enthalpy chart of Novel ultralow-temperature compression refrigerating system of the present invention；
Fig. 5 is a kind of Novel ultralow-temperature compression refrigerating system refrigerant condition point of the present invention（Band regenerator）Signal
Figure；
Fig. 6 is a kind of schematic diagram of Novel ultralow-temperature compression refrigerating system refrigerant condition point of the present invention；
Wherein：1st, single-stage compressor；2nd, single machine compression with double stage machine；3rd, the first oil eliminator；4th, mechanical filter；5th, ship
Use condenser；6th, first throttle device；9th, second throttling device；7th, intercooler；8th, device for drying and filtering；10th, vaporizer；
11st, gas-liquid separator；12nd, regenerator；13rd, the second oil eliminator.
Specific embodiment
A kind of Novel ultralow-temperature compression refrigerating system of the present invention between single machine compression with double stage machine and vaporizer by going here and there
Connection arranges a single-stage compressor to realize reducing compression ratio of the single machine compression with double stage machine when ultralow temperature is produced, and makes system operation
More energy-conservation.Vaporizer low-temperature low-pressure refrigerant steam out is first sucked and compressed by single-stage compressor, the refrigeration after compression
Agent steam is sucked after mechanical filter filtration by unit double-stage compressor low-pressure stage cylinder, after compression and from intercooling
The refrigerant vapour mixing of device, is then sucked by unit double-stage compressor hiigh pressure stage cylinder, is finally compressed to condensing state and is entered
Enter to be completed in condenser the compression process of compressor.
Operating process to make present invention realization is easy to understand with creation characteristic, with reference to specific embodiment,
The present invention is expanded on further.Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
Fig. 1 is a kind of Novel ultralow-temperature compression refrigerating system of the invention（Band regenerator）Schematic diagram, be also certain actual items
Purpose systematic schematic diagram, including single-stage compressor 1, the first oil eliminator 3, mechanical filter 4, single machine compression with double stage machine 2, second
Oil eliminator 13, bunker oil separator 5, first throttle device 6, intercooler 7, drying cooling device 8, second throttling device 9,
Vaporizer 10, gas-liquid separator 11, regenerator 12, it is characterised in that：Described single-stage compressor 1 is in single machine compression with double stage machine 2
Between vaporizer 11, mechanical filter 4 is provided between single-stage compressor 1 and single machine compression with double stage machine 2, in vaporizer 10
Import and export pipeline is provided with regenerator 12；The outlet of described single-stage compressor 1 is connected with the entrance of the first oil eliminator 3；First
The outlet of oil eliminator 3 is connected with the entrance of mechanical filter 4；The outlet of mechanical filter 4 is low with single machine compression with double stage machine 2
Air entry of arbitrarily downgrading is connected；The outlet of single machine compression with double stage machine 2 is connected with the entrance of the second oil eliminator 13；Second oil eliminator 13
Outlet is connected with the entrance of marine condenser 5；The outlet of marine condenser 5 point two-way, all the way first throttle device 6 throttles described in Jing
Intercooler 7 is entered afterwards, and another road is connected with after the heat exchange of intercooler 7 with the entrance of device for drying and filtering 8；Intercooler
7 outlet is connected with the hiigh pressure stage air entry of single machine compression with double stage machine 2；The outlet of drying cooling device 8 is connected with regenerator 12；Return
Hot device 12 is connected through second throttling device 9 with the entrance of vaporizer 10；The outlet of vaporizer 10 and the entrance of gas-liquid separator 11
It is connected；The outlet of gas-liquid separator 11 is connected with the entrance of regenerator 12；The outlet of regenerator 12 and the air-breathing of single-stage compressor 1
Mouth is connected.
Fig. 1 is incomplete cooling three stage compression kind of refrigeration cycle in the middle of once throttling（Band regenerator）Schematic diagram, Fig. 3 is to be
System（Band regenerator）Operation pressure-enthalpy chart, Fig. 5 is system（Band regenerator）Cold-producing medium running status point schematic diagram.
Working medium workflow：The outlet refrigerant condition of vaporizer 10 is a, after gas-liquid separator 11, the gaseous state of a states
Cold-producing medium through regenerator 12 by the refrigerant heat of h states to state a ' after suck and be compressed to state by single-stage compressor 1
b；Contain impurity in order to prevent machine oil and discharging refrigerant of the single-stage compressor 1 in running, thus in single stage compress
The first oil eliminator 3, mechanical filter 4 are provided between machine 1 and single machine compression with double stage machine 2, the b state cold-producing mediums after filtration
Steam is sucked by the low-pressure stage air entry of unit double-stage compressor and is compressed to c states, then with the Jing from intercooler 7
The unsaturated cold-producing medium of the g states crossed after first throttle device 6 throttles mixes to state d, then by unit double-stage compressor 2
Hiigh pressure stage air entry sucks and is compressed to e states；In order to the machine oil for preventing single machine compression with double stage machine 2 is entered into high temperature refrigerant
Marine condenser 5 affects its heat exchange property, e states refrigerant vapour to enter condensation peculiar to vessel after the filtration of the second oil eliminator 13
Device 5, and it is condensed to saturation f；Marine condenser outlet divides two-way, and all the way cold-producing medium throttles through first throttle device 6
Intercooler is entered to state g, is subsequently sucked by the hiigh pressure stage air entry of unit double-stage compressor 2, another road cold-producing medium
Exchanged heat with intercooler 7 and state h is subcooled to by state f；It is laggard that h state cold-producing mediums sequentially pass through device for drying and filtering 8
Enter and be too cold j states after heat exchanger 12 and a state refrigerant heat exchangers；J states cold-producing medium enters second throttling device 9, and quilt
Throttle to state k, then go through and be changed into after the evaporation endothermic of vaporizer 10 a state refrigerant vapours.
In the project, in design conditions：- 65 DEG C of evaporating temperature, at 40 DEG C of condensation temperature, from single machine compression with double stage
Machine, using refrigeration system is not exclusively cooled down in the middle of once throttling, using R404A as cold-producing medium, its evaporating pressure is
35.485kPa, condensing pressure is 1814.6kPa, and according to graphing method the optimal intermediate pressure of the refrigeration system under the operating mode is tried to achieve
For 210.412 kPa, the compression ratio of system high pressure level is 8.624, and according to piston compressor compression ratio 8 original is usually no more than
Then, system high pressure level is in overload operation state, and now total wasted work of compressor is 112.4kJ/kg；But in present invention side
In method, system is changed to three stage compression by original two stages of compression, is 4 according to the compression ratio of single-stage compressor, then single-stage compressor
Outlet pressure be 141.94 kPa, the intermediate pressure that can obtain unit two-shipper compressor according to compression ratio equal principle is
507.5, the compression ratio now just arbitrarily downgraded is 3.6, and much smaller than 8, compressor operation is normal, and total wasted work of two compressors is
100.31 kJ/kg, system operation more energy-conservation.
Embodiment 2
Fig. 2 is a kind of schematic diagram of Novel ultralow-temperature compression refrigerating system of the invention, including single-stage compressor 1, first is oily
Separator 3, mechanical filter 4, single machine compression with double stage machine 2, the second oil eliminator 13, marine condenser 5, first throttle device 6,
Intercooler 7, drying cooling device 8, second throttling device 9, vaporizer 10, gas-liquid separator 11, it is characterised in that：Described
Single-stage compressor 1 sets between single machine compression with double stage machine 2 and vaporizer 11 between single-stage compressor 1 and single machine compression with double stage machine 2
There is mechanical filter 4；The outlet of described single-stage compressor 1 is connected with the entrance of the first oil eliminator 3；First oil eliminator 3
Outlet is connected with the entrance of mechanical filter 4；The outlet of mechanical filter 4 and the low-pressure stage air entry of single machine compression with double stage machine 2
It is connected；The outlet of single machine compression with double stage machine 2 is connected with the entrance of the second oil eliminator 13；The outlet of the second oil eliminator 13 with it is peculiar to vessel
The entrance of condenser 5 is connected；The outlet of marine condenser 5 point two-way, enters centre after all the way first throttle device 6 throttles described in
Cooler 7, another road is connected with after the heat exchange of intercooler 7 with the entrance of device for drying and filtering 8；The outlet of intercooler 7 with
The hiigh pressure stage air entry of single machine compression with double stage machine 2 is connected；The outlet of drying cooling device 8 is connected with the entrance of second throttling device 9；The
The outlet of two throttling arrangements 9 is connected with the entrance of vaporizer 10；The outlet of vaporizer 10 is connected with the entrance of gas-liquid separator 11；Gas
The outlet of liquid/gas separator 11 is connected with the air entry of single-stage compressor 1.
Fig. 2 is the schematic diagram that three stage compression kind of refrigeration cycle is not exclusively cooled down in the middle of once throttling, and Fig. 4 is that system operation presses enthalpy
Figure, Fig. 6 is system refrigerant running status point schematic diagram.
Working medium workflow：The outlet refrigerant condition of vaporizer 10 is a, after gas-liquid separator 11, the gaseous state of a states
Cold-producing medium sucks and is compressed to state b by single-stage compressor 1；In order to prevent machine oil of the single-stage compressor 1 in running and
Contain impurity in discharging refrigerant, thus be provided between single-stage compressor 1 and single machine compression with double stage machine 2 first oil eliminator 3,
Mechanical filter 4, the b states refrigerant vapour after filtration is sucked and pressed by the low-pressure stage air entry of unit double-stage compressor
C states are reduced to, then with the unsaturated cold-producing medium of the g states after first throttle device 6 throttles from intercooler 7
Mix to state d, then suck and be compressed to e states by the hiigh pressure stage air entry of unit double-stage compressor 2；In order to prevent unit
The machine oil of double-stage compressor 2 enters into marine condenser 5 with high temperature refrigerant affects its heat exchange property, e state refrigerant vapours
Marine condenser 5 is entered after the second oil eliminator 13 is filtered, and is condensed to saturation f；Marine condenser outlet point
Two-way, all the way cold-producing medium throttle to state g into intercooler through first throttle device 6, subsequently by single machine two-stage pressure
The hiigh pressure stage air entry suction of contracting machine 2, another road cold-producing medium is exchanged heat and is subcooled to state by state f with intercooler 7
h；H states cold-producing medium enters second throttling device 9 through device for drying and filtering 8, and is throttled into state k, then goes through evaporation
It is changed into a state refrigerant vapours after the evaporation endothermic of device 10.
The operation characteristic of the present invention：By being arranged in series a single stage compress between single machine compression with double stage machine and vaporizer
Machine, effectively reduce high and low pressure stage compression ratio when single machine compression with double stage mechanism takes ultralow temperature, it is to avoid single machine compression with double stage machine
Overload operation, extends the service life of single machine compression with double stage machine, while double-stage compressor working condition is improved, this
More simultaneously, single machine compression with double stage refrigeration system reduces near a kind of energy consumption of compressor of Novel ultralow-temperature compression refrigerating system of invention
11%, longtime running more energy-conservation, while a kind of Novel ultralow-temperature compression refrigerating system simple structure of the present invention, series operation
Pipeline arrangement is simple, and compared to traditional single machine compression with double stage refrigeration system, the super low temperature refrigeration system advantage of the present invention is obvious.
Analysis above understands that a kind of Novel ultralow-temperature compression refrigerating system of the present invention effectively improves Two-stage Compression
The working condition of machine, significantly reduces the high and low compression ratio arbitrarily downgraded of double-stage compressor, while extending compressor service life
So that the total energy consumption of system compressors reduces nearly 11%, power savings advantages are obvious；In addition, the Novel ultralow-temperature compression refrigeration of the present invention
System structure arrangement is simple, and unit floor space amplification is less, advantage when using on the ocean fishing vessel for need ultra-low temperature surroundings
Substantially.
Claims (5)
1. a kind of Novel ultralow-temperature compression refrigerating system, including single-stage compressor（1）, the first oil eliminator（3）, mechanical filter
（4）, single machine compression with double stage machine（2）, the second oil eliminator（13）, marine condenser（5）, first throttle device（6）, intercooling
Device（7）, drying cooling device（8）, second throttling device（9）, vaporizer（10）, gas-liquid separator（11）, it is characterised in that：Single-stage
Compressor（1）In single machine compression with double stage machine（2）With vaporizer（11）Between, single-stage compressor（1）With single machine compression with double stage machine（2）
Between be provided with mechanical filter（4）；Single-stage compressor（1）Outlet and the first oil eliminator（3）Entrance is connected；First is separating of oil
Device（3）Outlet and mechanical filter（4）Entrance be connected；Mechanical filter（4）Outlet and single machine compression with double stage machine（2）'s
Low-pressure stage air entry is connected；Single machine compression with double stage machine（2）Outlet and the second oil eliminator（13）Entrance is connected；Second is separating of oil
Device（13）Outlet and marine condenser（5）Entrance is connected；Marine condenser（5）Outlet point two-way, Jing first throttles all the way
Device（6）Intercooler is entered after throttling（7）, another road and intercooler（7）With device for drying and filtering after heat exchange（8）Enter
Mouth is connected；Intercooler（7）Outlet and single machine compression with double stage machine（2）Hiigh pressure stage air entry be connected；Drying cooling device（8）
Outlet and second throttling device（9）Entrance is connected；Second throttling device（9）Outlet and vaporizer（10）Entrance be connected；
Vaporizer（10）Outlet and gas-liquid separator（11）Entrance is connected；Gas-liquid separator（11）Outlet and single-stage compressor（1）
Air entry be connected.
2. a kind of Novel ultralow-temperature compression refrigerating system according to claim 1, it is characterised in that described single stage compress
Machine（1）With single machine compression with double stage machine（2）For piston compressor.
3. a kind of Novel ultralow-temperature compression refrigerating system according to claim 1, it is characterised in that described first throttle
Device（6）, second throttling device（9）For electric expansion valve.
4. a kind of Novel ultralow-temperature compression refrigerating system according to claim 1, it is characterised in that described intercooling
Device（7）For plate type heat exchanger.
5. a kind of Novel ultralow-temperature compression refrigerating system according to claim 1, it is characterised in that described mechanical filter
Device（4）For pneumatic filter.
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| CN201510208744.7A CN104792052B (en) | 2015-04-29 | 2015-04-29 | Novel ultralow-temperature compression refrigerating system |
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| CN201510208744.7A CN104792052B (en) | 2015-04-29 | 2015-04-29 | Novel ultralow-temperature compression refrigerating system |
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| CN104792052B true CN104792052B (en) | 2017-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052178A (en) * | 2016-05-29 | 2016-10-26 | 湖南大学 | Two-stage refrigerating circulation system with economizer and oil cooling compression |
| CN111102759A (en) * | 2019-12-18 | 2020-05-05 | 南京久鼎精机冷冻设备有限公司 | Energy-saving CO2Double-machine double-stage refrigeration multi-split system |
| CN111043802A (en) * | 2020-01-13 | 2020-04-21 | 上海海洋大学 | Single-machine two-stage refrigeration system monitoring software |
| CN113137774A (en) * | 2021-05-13 | 2021-07-20 | 上海海洋大学 | Software-combined two-stage compression refrigeration cycle thermodynamic analysis method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05322334A (en) * | 1992-05-20 | 1993-12-07 | Hitachi Ltd | Multi-stage compression freezing cycle and its actuating method |
| JP2004333009A (en) * | 2003-05-07 | 2004-11-25 | Nissin Kogyo Kk | Refrigeration unit |
| CN100538224C (en) * | 2007-10-31 | 2009-09-09 | 蓬莱京鲁渔业有限公司 | Ultra low temperature cool house |
| JP2012073002A (en) * | 2010-09-29 | 2012-04-12 | Daikin Industries Ltd | Refrigerating device |
| CN204165323U (en) * | 2014-09-04 | 2015-02-18 | 重庆耐德能源装备集成有限公司 | Natural gas liquefaction system |
| CN204730505U (en) * | 2015-04-29 | 2015-10-28 | 上海海洋大学 | A kind of novel three stage compression ultra-low temperature refrigerating device |
-
2015
- 2015-04-29 CN CN201510208744.7A patent/CN104792052B/en not_active Expired - Fee Related
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