CN111043782A - Large-scale modularization refrigerating fluid refrigerating system - Google Patents
Large-scale modularization refrigerating fluid refrigerating system Download PDFInfo
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- CN111043782A CN111043782A CN201911353381.0A CN201911353381A CN111043782A CN 111043782 A CN111043782 A CN 111043782A CN 201911353381 A CN201911353381 A CN 201911353381A CN 111043782 A CN111043782 A CN 111043782A
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- 239000007788 liquid Substances 0.000 claims abstract description 51
- 238000005057 refrigeration Methods 0.000 claims abstract description 33
- 239000003507 refrigerant Substances 0.000 claims description 20
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
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- 238000005265 energy consumption Methods 0.000 description 3
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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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
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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
- F25B2500/00—Problems to be solved
- F25B2500/05—Cost reduction
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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
- F25B2500/00—Problems to be solved
- F25B2500/21—Reduction of parts
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
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- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a large modular refrigerating fluid refrigerating system, and belongs to the field of refrigerating systems. The method comprises the following steps: the refrigerating system comprises a refrigerating main machine, a condenser, a siphon device, a liquid receiver and an oil cooler; the refrigeration main machine comprises a plurality of complete screw water chilling units, and each complete screw water chilling unit comprises a screw compressor, an oil separator, a throttle valve and an evaporator. A plurality of complete screw water chilling units are arranged on a common set of modular refrigeration platform in parallel; the evaporator, the screw compressor, the oil separator, the siphon device and the liquid receiver are sequentially connected to form a circulation loop. The refrigerating system has the advantages of energy conservation, good reliability, low equipment cost and flexible installation.
Description
Technical Field
The invention belongs to the field of refrigeration systems, and particularly relates to a large modular refrigerating fluid refrigeration system.
Background
The screw type water chiller is named as a screw type water chiller because a compressor which is a key component is a screw type water chiller, and the state of the unit from an evaporator is a gaseous refrigerant; the refrigerant is condensed in a condenser in an isobaric cooling mode, the refrigerant is condensed to form a liquid refrigerant, the liquid refrigerant is expanded to low pressure through a throttle valve to form a gas-liquid mixture, the liquid refrigerant at low temperature and low pressure absorbs heat of a cooled substance in an evaporator and is changed into a gas refrigerant again, the gas refrigerant enters the compressor again through a pipeline to start new circulation, and the four processes of the refrigeration cycle are the main working principle of the screw type water chiller.
The screw type water chiller has power higher than that of a scroll type water chiller, is mainly applied to the aspects of central air-conditioning systems or large-scale industrial refrigeration, and comprises a double-screw refrigeration compressor and a single-screw refrigeration compressor, wherein the double-screw refrigeration compressor is an energy-adjustable oil injection compressor, and three continuous processes of air suction, compression and exhaust are realized by the periodic volume change generated when a pair of mutually meshed male and female rotors in a machine body rotate. The single screw refrigerating compressor utilizes the engagement of a driving rotor and two star wheels to generate compression, and three continuous processes of air suction, compression and air exhaust are realized by the periodic volume change generated when the rotor and the star wheels rotate. Because the star wheels are symmetrically arranged, the cycle is compressed twice when rotating for one circle, and the exhaust volume is twice of the exhaust volume of one circle. The exhaust process comprises that the front edge of the compression cavity rotates to the exhaust port and then starts to exhaust, and a working cycle is completed.
The screw cold water system mainly comprises a screw compressor, an oil separator, a condenser, a liquid receiver, a throttle valve, an evaporator and other equipment and corresponding pipelines. The existing screw cold water system mainly adopts an independent refrigerating system. Namely: 1 screw compressor, an oil separator, a condenser, a liquid receiver, a throttle valve and an evaporator are respectively composed of 1 (only one) compressor. When the refrigerating capacity is larger, the system consists of several independent systems. The screw compressor compresses low-pressure refrigerant gas into high-pressure gas, the oil separator separates lubricating oil in the high-pressure gas, the condenser condenses the high-pressure gas into liquid, the high-pressure liquid is changed into low pressure through the throttle valve and enters the evaporator, the low-pressure liquid absorbs heat in the evaporator to cool cold water and evaporate the cold water into low-pressure gas, and then refrigeration cycle is completed and the purpose of cooling the cold water is achieved. For future larger cold load demands, the refrigerating units are matched at one time, or new independent refrigerating systems are gradually added according to the increase of the cold load.
The prior art solutions have disadvantages including:
1) the energy consumption is large;
2) the reliability is poor;
3) the one-time investment of the equipment is high;
4) the later-stage equipment is inconvenient to construct, and normal production can be influenced when the later-stage equipment is combined with an old system;
5) the system is completely independent and can not realize systematic full-automatic control.
Disclosure of Invention
The invention aims to provide a large modular refrigerating fluid refrigerating system which has the advantages of energy conservation, good reliability, low equipment cost and flexible installation.
The purpose of the invention is realized by the following technical scheme:
a large modular chilled liquid refrigeration system comprising: the refrigerating system comprises a refrigerating main machine, a condenser, a siphon device, a liquid receiver and an oil cooler;
the refrigeration host comprises a plurality of complete screw water chilling units, and each complete screw water chilling unit comprises a screw compressor, an oil separator, a throttle valve and an evaporator; the complete set of screw water chilling unit adopts a modular design and can be independently disassembled;
a plurality of complete screw water chilling units are arranged on a common set of modular refrigeration platform in parallel; the evaporator, the screw compressor and the oil separator are sequentially connected, a gas outlet of the oil separator is connected with a gas inlet at the upper part of the condenser, a liquid outlet at the lower part of the condenser is connected with an inlet above the siphon, an outlet at the side surface of the siphon is connected with an inlet above the liquid reservoir, an outlet below the liquid reservoir is connected with the evaporator, and a throttle valve is arranged on a connecting pipeline between the outlet below the liquid reservoir and the evaporator; a communicating pipeline is arranged above the siphon device and the upper part of the condenser; the connections are all pipeline connections.
An outlet above the oil cooler is connected with an inlet above the siphon device, an inlet below the oil cooler is connected with an outlet below the siphon device, and the oil cooler and the siphon device form a circulation loop;
preferably, the refrigeration host further comprises an automatic control display system, and a plurality of screw water chilling unit sets share one automatic control display system.
Preferably, the screw water chilling unit set is formed by connecting more than two screw water chilling unit sets in parallel.
Preferably, the screw compressor is a single-machine two-stage semi-closed screw compressor, and the screw compressors are arranged in parallel.
Preferably, the screw compressor and the evaporator are both separately removable.
Preferably, the condenser is more than two and is arranged in parallel, and the condenser adopts an evaporative condenser.
Preferably, the evaporators are more than two and arranged in parallel, and the evaporators are stainless steel plate type evaporators.
Preferably, the condenser is located at a higher level than the siphon, and the siphon is located at a higher level than the other devices in the system except for the condenser and the siphon.
The modular refrigeration platform is composed of auxiliary equipment facilities required by more modular water chilling units which can meet the use of larger cooling loads in the future, wherein the auxiliary equipment facilities comprise pipelines and circulating pumps.
The automatic control display system automatically acquires data of the complete set of screw water chilling unit, the evaporator and the circulating pump which are modularly designed in the large modular refrigerating fluid refrigerating system, and sends an operation instruction to relevant equipment according to a set value.
The invention has the beneficial effects that:
1. energy conservation, comprising: the parallel evaporative condenser is adopted to obtain an energy-saving effect and the stainless steel plate evaporator is adopted to obtain the energy-saving effect, the total heat transfer performance of the evaporator is greatly improved, and the refrigeration efficiency is improved by 20% compared with the traditional single-stage compression mode.
2. The reliability is good: the prior art adopts an independent system, when the screw compressor fails, the cold water system cannot refrigerate, and the corresponding cold application places of the system stop running completely. The invention adopts the parallel screw cold water system, the high-pressure pipelines are all connected in parallel, when part of the screw compressors are in failure, other screw compressors can still work, and the cooling requirement of a cold place can be met or maintained.
3. The equipment cost is reduced: compared with the existing independent system, the equipment cost of the parallel screw cold water system is reduced.
4. The installation is flexible: the complete set of screw water chilling unit adopts a modular design and can be independently disassembled; if the later-stage user needs to expand the production, only one or more units are simply added to the existing system, and the existing units can normally run during adding, so that the normal production of the user cannot be influenced.
5. The screw compressor and the evaporator can be independently detached without influencing the normal operation of other equipment.
Drawings
Fig. 1 is a schematic structural diagram of the system of the present invention.
Wherein, 1-screw compressor; 2-an oil separator; 3-a condenser; 4-a siphon; 5-a liquid reservoir; 6-a throttle valve; 7-an evaporator; 8-oil cooler.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1, a large modular chilled liquid refrigeration system includes: a refrigeration main machine, a condenser 3, a siphon 4, a liquid receiver 5 and an oil cooler 8;
the refrigeration host comprises a plurality of complete screw water chilling units, and each complete screw water chilling unit comprises a screw compressor 1, an oil separator 2, a throttle valve 6 and an evaporator 7; the complete set of screw water chilling unit adopts a modular design and can be independently disassembled;
a plurality of complete screw water chilling units are arranged on a common set of modular refrigeration platform in parallel; the evaporator 7, the screw compressor 1 and the oil separator 2 are sequentially connected, a gas outlet of the oil separator 2 is connected with a gas inlet at the upper part of the condenser 3, a liquid outlet at the lower part of the condenser 3 is connected with an inlet at the upper part of the siphon 4, an outlet at the side surface of the siphon 4 is connected with an inlet at the upper part of the liquid reservoir 5, an outlet at the lower part of the liquid reservoir 5 is connected with the evaporator 7, and a connecting pipeline between the outlet at the lower part of the liquid reservoir 5 and the evaporator 7 is provided with a; the connections are all pipeline connections.
In addition, a communication line is provided above the siphon 4 and above the condenser 3 for maintaining the pressure operation.
An outlet above the oil cooler 8 is connected with an inlet above the siphon device 4, an inlet below the oil cooler 8 is connected with an outlet below the siphon device 4, and the oil cooler 8 and the siphon device 4 form a circulation loop;
the condenser 3 is located at a higher level than the siphon 4, and the siphon 4 is located at a higher level than the other devices of the system except the condenser 3 and the siphon 4.
The refrigeration host machine also comprises an automatic control display system, and a plurality of complete screw water chilling units share one automatic control display system.
The screw compressor 1 is a single-machine two-stage semi-closed screw compressor, and the screw compressors 1 are 3 in parallel.
The condenser 3 adopts an evaporative condenser, and 2-4 condensers 3 are arranged in parallel. The parallel arrangement of the condensers 3 can realize that other condensers 3 can still work when part of the condensers 3 break down, thereby effectively improving the reliability of the system.
The evaporators 7 are 2-4 and are arranged in parallel, the evaporators 7 are stainless steel plate type evaporators, and the refrigeration efficiency is improved by 20% compared with that of a traditional single-stage compression mode. The parallel evaporator 7 is designed according to the requirement of simultaneous working of all the screw compressors 1, when part of the screw compressors 1 work, the evaporation area of the evaporator 7 is increased equivalently, the heat exchange temperature difference between the evaporation temperature and a cooled medium is reduced, the evaporation temperature is increased, the energy consumption is reduced, the evaporation temperature is reduced by 1 ℃, and the power consumption of unit refrigerating capacity is increased by 4.5%.
The main large components such as the screw compressor 1 and the evaporator 7 are fully convenient to maintain and can be detached independently without influencing the normal operation of other equipment.
The number of throttle valves 6 is adapted to the number of evaporators 7, one evaporator 7 being provided with one throttle valve 6.
The modular refrigeration platform also comprises auxiliary equipment facilities required by more modular screw chiller sets capable of meeting the use of larger future cooling loads, wherein the auxiliary equipment facilities comprise pipelines and circulating pumps.
The automatic control display system automatically collects data of the complete set of screw water chilling unit, the evaporator 7 and the circulating pump which are modularly designed in the large modular refrigerating fluid refrigerating system, and sends an operation instruction to relevant equipment according to a set value.
The working principle of the system provided by the invention is as follows: lubricating oil of the screw water chilling unit set can enter a pipeline, a screw compressor 1 of the screw water chilling unit set compresses low-pressure refrigerant gas into high-pressure gas, the high-pressure gas is sent to a shared oil separator 2, the lubricating oil in the high-pressure gas is separated by the oil separator 2, the gas after oil-gas separation enters a condenser 3 connected in parallel, the high-pressure gas is condensed into liquid by the condenser 3, the condensed refrigerant liquid flows into a shared siphon 4 and a liquid reservoir 5, the condensed refrigerant liquid is throttled and reduced in pressure by a throttle valve 6 and then enters an evaporator 7 independent from each screw water chilling unit set, the low-pressure liquid is heated and evaporated into low-pressure gas in the evaporator 7 and then is sucked away by the screw compressor 1, so that refrigeration cycle is completed, the purpose of cooling cold water in the evaporator 7 is achieved, and the chilled water cooled in the evaporator 7 is sent to.
The oil cooler 8 stores refrigerating machine oil required by the operation of the screw water chilling unit set, and in order to ensure the safe operation of the screw water chilling unit set, the normal oil temperature of the machine oil is ensured firstly. After the screw chiller set starts to operate, when the liquid amount discharged from the condenser 3 is not large, the refrigerant liquid firstly flows out from the bottom of the siphon 4 and enters the oil cooler 8, the oil cooler 8 is a heat exchanger, in the oil cooler 8, the refrigerant liquid is heated by oil, gas is generated to evaporate, the gas returns to the siphon 4, and simultaneously the oil in the oil cooler 8 is cooled. This avoids the need for an additional cooling water circuit in the prior art. As the screw water chilling unit set operates, more and more liquid flows down from the condenser 3, and the liquid level in the siphon 4 is higher and higher. When reaching a certain height, the water flows out from a pipeline on the side surface of the siphon device 4, enters the liquid storage device 5 for buffering and then enters the complete set screw water chilling unit.
The scheme of the embodiment has the following advantages:
1. energy conservation, comprising:
(1) the parallel evaporative condenser is adopted to obtain the energy-saving effect, and the evaporative condenser is selected according to the requirement that all screw compressors work simultaneously; when the system has small cold load and only part of the screw compressor works, the evaporative condenser can still be fully put into operation. At the moment, for the working screw compressor, the condensing area is increased, the heat exchange temperature difference between the condensing temperature and the cooling medium is reduced, the condensing temperature is reduced, the energy consumption is reduced, the condensing temperature is increased by 1 ℃, and the power consumption of unit refrigerating capacity is increased by 3-3.5%.
(2) Energy conservation is achieved by adopting a stainless steel plate type evaporator: a 304 stainless steel plate heat exchanger was used. The refrigerant outlet is a gas-liquid mixture in a nearly saturated state, and the evaporation area can be fully utilized. The heat exchange efficiency is greatly improved, and the heat exchange can be fully and effectively carried out with the secondary refrigerant, so the heat exchange coefficient is higher. The secondary refrigerant is in a turbulent state and has higher heat transfer coefficient. The flow speed of the working medium liquid is greatly improved, and the heat transfer coefficient of the refrigerant side of the working medium liquid is also greatly improved, so that the total heat transfer performance of the evaporator is greatly improved.
2. The reliability is good.
By adopting the independent system, when the screw compressor fails, the cold water system cannot refrigerate, and the corresponding cold application places of the system stop running completely. The parallel screw cold water system is adopted, the high-pressure pipelines are all connected in parallel, when part of screw compressors are in failure, other screw compressors can still work, and the cooling requirement of a cold place can be met or maintained.
3. The equipment cost is reduced.
Compared with the original independent system, the screw compressor parallel cold water system has the advantage that the equipment cost is reduced. Taking an independent system with the same refrigerating capacity and a screw compressor parallel cold water system as an example for comparison:
independent system: all 3 screw compressors, oil separators, condensers, siphons, liquid reservoirs, throttle valves, evaporators, automatic control display devices, etc. are required.
Parallel screw cold water system: 3 screw compressors; 2-4 condensers and 4 evaporators are needed respectively; only 1 oil separator, siphon, liquid receiver, automatic control display equipment, unit frame etc. need. The refrigerating main machines are 1, and the floor area of a machine room is small. Meanwhile, in consideration of the cold load characteristic, the heat discharge amount of a condenser and the refrigerating amount of an evaporator of the parallel screw cold water system are generally smaller than the sum of 3 independent systems, so that the specifications of the condenser and the evaporator can be properly reduced.
Therefore, the equipment cost can be reduced due to the reduction of the number of auxiliary equipment, the change of specifications and the like.
4. The installation is flexible.
If the late-stage user needs to expand the production, only one or more units are simply added to the existing system. When the filling is carried out, the existing unit can normally operate, and the normal production of users cannot be influenced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A large modular refrigerant fluid refrigeration system, comprising: the refrigerating system comprises a refrigerating main machine, a condenser (3), a siphon (4), a liquid receiver (5) and an oil cooler (8);
the refrigeration main machine comprises a plurality of complete screw water chilling units, and each complete screw water chilling unit comprises a screw compressor (1), an oil separator (2), a throttle valve (6) and an evaporator (7); the complete set of screw water chilling unit adopts a modular design and can be independently disassembled;
a plurality of complete screw water chilling units are arranged on a common set of modular refrigeration platform in parallel; the evaporator (7), the screw compressor (1) and the oil separator (2) are sequentially connected, a gas outlet of the oil separator (2) is connected with a gas inlet at the upper part of the condenser (3), a liquid outlet at the lower part of the condenser (3) is connected with an inlet above the siphon (4), an outlet at the side surface of the siphon (4) is connected with an inlet above the liquid reservoir (5), an outlet below the liquid reservoir (5) is connected with the evaporator (7), and a throttle valve (6) is arranged on a connecting pipeline between the outlet below the liquid reservoir (5) and the evaporator (7); a communicating pipeline is arranged above the siphon (4) and the upper part of the condenser (3); the connections are all pipeline connections;
an outlet above the oil cooler (8) is connected with an inlet above the siphon device (4), an inlet below the oil cooler (8) is connected with an outlet below the siphon device (4), and the oil cooler (8) and the siphon device (4) form a circulation loop.
2. The large modular chilled liquid refrigeration system of claim 1, wherein the refrigeration host further comprises an automatic control display system, and a plurality of screw chiller sets share one automatic control display system.
3. The large modular chilled liquid refrigeration system according to claim 1 or 2, wherein the screw chiller set is two or more than two sets connected in parallel.
4. The large modular refrigerating fluid refrigerating system according to claim 1 or 2, wherein the screw compressor (1) is a single-machine two-stage semi-closed screw compressor, and more than two screw compressors (1) are arranged in parallel.
5. A large modular chilled liquid refrigeration system according to claim 1 or 2, characterized in that the screw compressor (1) and the evaporator (7) are individually removable.
6. A large scale modular chilled liquid refrigeration system according to claim 1 or 2, wherein the condensers (3) are arranged in parallel, and the condensers (3) are evaporative condensers.
7. A large modular chilled liquid refrigeration system according to claim 1 or 2, characterized in that the evaporators (7) are arranged in parallel, and the evaporators (7) are stainless steel plate evaporators.
8. A large modular refrigerant liquid system according to claim 1 or 2, wherein the condenser (3) is located at a higher level than the siphon (4), and the siphon (4) is located at a higher level than the other devices of the system except the condenser (3) and the siphon (4).
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| CN201911353381.0A CN111043782A (en) | 2019-12-25 | 2019-12-25 | Large-scale modularization refrigerating fluid refrigerating system |
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| CN201911353381.0A CN111043782A (en) | 2019-12-25 | 2019-12-25 | Large-scale modularization refrigerating fluid refrigerating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146297A (en) * | 2020-09-22 | 2020-12-29 | 华商国际工程有限公司 | Refrigeration system and operation control method thereof |
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