CN109140849B - Refrigerant filling method of thermosiphon oil cooling refrigeration system - Google Patents
Refrigerant filling method of thermosiphon oil cooling refrigeration system Download PDFInfo
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- CN109140849B CN109140849B CN201811094820.6A CN201811094820A CN109140849B CN 109140849 B CN109140849 B CN 109140849B CN 201811094820 A CN201811094820 A CN 201811094820A CN 109140849 B CN109140849 B CN 109140849B
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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
- F25B45/00—Arrangements for charging or discharging 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/001—Charging refrigerant to a cycle
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Abstract
The invention discloses a refrigerant filling method of a thermosiphon oil cooling refrigeration system, which adopts filling equipment mainly comprising a refrigerant container, a distribution station, a main pipeline and three distribution pipelines to fill refrigerant into the thermosiphon oil cooling refrigeration system, wherein the main pipeline is provided with a refrigerant inlet valve, the distribution station is provided with a first refrigerant outlet valve, a second refrigerant outlet valve, a third refrigerant outlet valve and a pressure gauge, the first refrigerant outlet valve, the second refrigerant outlet valve and the third refrigerant outlet valve are respectively and sequentially connected with a pipeline between an evaporator and a low-pressure circulation liquid storage device, a pipeline between a condenser and a thermosiphon liquid storage device and a pipeline between a high-pressure liquid storage device and a throttle valve through one distribution pipeline, one end of the main pipeline is connected with the refrigerant container, and the other end of the main pipeline is connected with the distribution station. The filling method has the advantages of simple structure, convenient operation, safety, reliability, clear program, high filling efficiency and the like.
Description
Technical Field
The invention relates to the technical field of refrigeration systems, in particular to a refrigerant filling method of a thermosiphon oil cooling refrigeration system.
Background
At present, a refrigeration system is generally divided into thermosiphon oil cooling and water cooling, wherein the thermosiphon oil cooling circulates by utilizing pressure difference formed by different densities of liquid and gas without using conveying equipment such as a pump and the like. Compared with a water cooling mode, the thermosiphon oil cooling can save water sources and avoid scaling in the heat exchanger to influence heat transfer, so that the thermosiphon oil cooling is widely applied.
As shown in fig. 1, the thermosiphon oil cooling and refrigerating system 5 includes a condenser 501, a thermosiphon accumulator 502, a high-pressure accumulator 503, a throttle valve 504, a low-pressure circulation accumulator 505, a refrigerant pump 506, an evaporator 507, a compressor 508, and a thermosiphon oil cooler 509, wherein the thermosiphon accumulator 502, the high-pressure accumulator 503, the throttle valve 504, the low-pressure circulation accumulator 505, and the compressor 508 are connected in sequence through a pipe 510 to form a loop, a loop pipe 511 is further connected between the condenser 501 and the thermosiphon accumulator 502, the thermosiphon oil cooler 509 is connected to the compressor 508 and the thermosiphon accumulator 502 through double pipes 510, and the low-pressure circulation accumulator 505, the refrigerant pump 506, and the evaporator 507 are connected.
At present, when internal equipment of a thermosiphon oil cooling refrigeration system is filled with refrigerant, a filling device and a filling mode which are the same as those of a water-cooled oil cooling system are basically adopted, and the thermosiphon oil cooling refrigeration system is low in safety, complex in structure, low in refrigerant filling speed and inconvenient to operate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a refrigerant filling method of a thermosiphon oil cooling refrigeration system, which adopts filling equipment with simple structure and convenient operation and is safe, reliable, clear in procedure and high in filling efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
a refrigerant filling method of a thermosiphon oil cooling refrigeration system adopts filling equipment which mainly comprises a refrigerant container, a distribution station, a main pipeline and three distribution pipelines to fill refrigerant into the thermosiphon oil cooling refrigeration system, wherein an agent inlet valve is arranged on the main pipeline, a first agent outlet valve, a second agent outlet valve, a third agent outlet valve and a pressure gauge are arranged on the distribution station, the first agent outlet valve, the second agent outlet valve and the third agent outlet valve are respectively and sequentially connected with a pipeline between an evaporator and a low-pressure circulation liquid storage device, a pipeline between a condenser and a thermosiphon liquid storage device and a pipeline between a high-pressure liquid storage device and a throttle valve through one distribution pipeline, one end of the main pipeline is connected with the refrigerant container, and the other end of the main pipeline is connected with the distribution station.
As a further improvement of the above technical solution:
the filling method comprises the following steps:
s1: firstly, enabling each valve to be in a closed state, opening a refrigerant container, slowly opening a throttle valve, an agent inlet valve and a second agent outlet valve of a distribution station, and filling a thermal siphon liquid storage device with a refrigerating system;
s2: when the refrigeration system of the thermosiphon liquid storage device is finished, the second agent outlet valve is closed, the third agent outlet valve is opened, and the high-pressure liquid storage device is filled with the refrigeration system;
s3: when the internal pressure of the high-pressure liquid storage device is close to or level with that of the refrigerant container, closing the third agent outlet valve, closing or reducing the throttle valve, starting the compressor and reducing the internal pressure of the low-pressure circulating liquid storage device;
s4: opening a first refrigerant outlet valve, filling refrigerant into the low-pressure circulation liquid storage device, and closing a refrigerant container when the liquid level heights of the refrigerant in the high-pressure liquid storage device and the low-pressure circulation liquid storage device reach the design height;
s5: fully opening the first agent outlet valve, keeping the compressor open, and pumping the refrigerant in the distribution station, the main pipeline and the distribution pipeline into the low-pressure circulation liquid storage device;
s6: when the pressure gauge is close to 0 and the surface of the distribution station stops frosting, closing the agent inlet valve and the compressor on the main pipeline;
s7: the main pipe is removed.
The designed height of the refrigerant in the high-pressure accumulator is 70% of the total height in the step S4, and the designed height of the refrigerant in the low-pressure circulation accumulator is 25% or 40% or 60% or 65% of the total height.
The main pipeline is connected to the distribution station through a connecting flange, and when the main pipeline is connected with the distribution station, the outflow state of the refrigerant in the refrigerant container is detected, wherein the detection comprises the following steps:
y1: a gap is reserved between the flange and the main pipeline;
y2: slightly opening the refrigerant inlet valve, and when white mist escapes from the gap, proving that the refrigerant in the refrigerant container smoothly flows out;
y3: and screwing the flange to tightly communicate the main pipeline with the distribution station.
The refrigerant in the refrigerant container is ammonia or freon.
The step S1 further comprises detecting leakage of the refrigerant, when the refrigerant in the refrigerant container is Freon, and when the pressure of the thermosiphon oil cooling refrigeration system reaches 0.2-0.3 Mpa, closing the second agent outlet valve, and applying soap water to each connection of filling equipment for leakage detection; when the refrigerant in the refrigerant container is ammonia, when the pressure of the thermosiphon oil cooling refrigeration system reaches 0.1-0.2 Mpa, the second agent outlet valve is closed, and leakage detection is carried out by enabling phenolphthalein or litmus test paper to be close to each connection part of the filling equipment.
And the suction pressure of the compressor in the step S3 is not lower than 0.15 Mpa.
The refrigerant pump is also turned on in step S3.
The main pipeline is a rubber hose, and each distribution pipeline is a seamless steel pipe.
The distribution station is also connected with a standby valve.
Compared with the prior art, the invention has the advantages that:
the invention discloses a refrigerant filling method of a thermosiphon oil cooling refrigeration system, which adopts filling equipment mainly comprising a refrigerant container, a distribution station, a main pipeline and three distribution pipelines to fill refrigerant into the thermosiphon oil cooling refrigeration system, wherein an agent inlet valve is arranged on the main pipeline, a first agent outlet valve, a second agent outlet valve, a third agent outlet valve and a pressure gauge are arranged on the distribution station, the first agent outlet valve, the second agent outlet valve and the third agent outlet valve are respectively and sequentially connected with a pipeline between an evaporator and a low-pressure circulation liquid storage device, a pipeline between a condenser and a thermosiphon liquid storage device and a pipeline between a high-pressure liquid storage device and a throttle valve through one distribution pipeline, one end of the main pipeline is connected with the refrigerant container, and the other end of the main pipeline is connected with the. The filling equipment mainly comprising the refrigerant container, the distribution station, the main pipeline and the three distribution pipelines is used for filling the refrigerant into the thermosiphon oil cooling refrigeration system, the filling equipment is simple in structure and convenient to operate, and the filling method is safe and reliable and high in filling efficiency.
Drawings
FIG. 1 is a schematic diagram of a thermosiphon oil cooling refrigeration system.
Fig. 2 is a schematic diagram of a refrigerant charge process for a thermosiphon oil cooling refrigeration system of the present invention.
FIG. 3 is a schematic diagram of a refrigerant charge method of the thermosiphon oil cooling refrigeration system of the present invention.
The reference numerals in the figures denote:
1. a refrigerant container; 2. a distribution station; 21. A first agent outlet valve; 22. a second dispensing valve; 23. a third agent outlet valve; 24. a pressure gauge; 25. a backup valve; 3. a main pipeline; 31. an agent inlet valve; 4. A distribution pipe; 5. a thermosiphon oil cooling refrigeration system; 501. a condenser; 502. a thermosiphon reservoir; 503. a high pressure reservoir; 504. a throttle valve; 505. a low pressure circulating reservoir; 506. a refrigerant pump; 507. an evaporator; 508. a compressor; 509. a thermosiphon oil cooler; 510. a pipeline; 511. a loop conduit.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
Fig. 2 and 3 show a refrigerant filling method of a thermosiphon oil cooling refrigeration system of the present embodiment, a filling device mainly composed of a refrigerant container 1, a distribution station 2, a main pipe 3 and three distribution pipes 4 is adopted to fill a refrigerant into a thermosiphon oil cooling refrigeration system 5, the main pipe 3 is provided with an inlet valve 31, the distribution station 2 is provided with a first outlet valve 21, a second outlet valve 22, a third outlet valve 23 and a pressure gauge 24, the first outlet valve 21, the second outlet valve 22 and the third outlet valve 23 are respectively connected to a pipe 510 between an evaporator 507 and a low pressure circulation liquid reservoir 505, a pipe 510 between a condenser 501 and a thermosiphon liquid reservoir 502 and a pipe 510 between a high pressure liquid reservoir 503 and a throttle valve 504 in sequence through one distribution pipe 4, one end of the main pipe 3 is connected to the refrigerant container 1, the other end thereof is connected to the distribution station 2, the main pipe 3 is a rubber hose, each distribution pipe 4 is a seamless steel pipe. The filling equipment mainly comprising the refrigerant container 1, the distribution station 2, the main pipeline 3 and the three distribution pipelines 4 fills the refrigerant into the thermosiphon oil cooling refrigeration system 5, the filling equipment is simple in structure and convenient to operate, and the filling method is safe and reliable and high in filling efficiency.
In this embodiment, a backup valve 25 is also connected to the dispensing station 2. The backup valve 25 is used to connect the backup refrigerant container 1.
In this embodiment, the refrigerant charging method of the thermosiphon oil cooling refrigeration system 5 includes the following steps:
s1: the thermo-siphon accumulator 502 is charged with refrigeration by first closing the valves and opening the refrigerant container 1 and then slowly opening the throttle valve 504, the inlet valve 31 and the second outlet valve 22 of the dispensing station 2. In this step, the valves around the distribution station 2 are closed, including the first dispensing valve 21, the second dispensing valve 22, the third dispensing valve 23, and the dispensing valve 31, or all the valves are closed, the refrigerant container 1 is opened, the throttle valve 504, the dispensing valve 31, and the second dispensing valve 22 of the distribution station 2 are opened slowly, the thermosiphon reservoir 502 is filled with refrigerant by using the pressure difference between the refrigerant container 1 and the thermosiphon reservoir 502, and when white frost appears in the distribution station 2, the main pipe 3, and the distribution pipe 4 and a fine flow sound is generated, it is indicated that the refrigerant is smoothly added to the thermosiphon oil cooling and refrigerating system 5.
S2: when the refrigerant charge of the thermosiphon reservoir 502 is completed, the second refrigerant outlet valve 22 is closed, the third refrigerant outlet valve 23 is opened, and the high-pressure reservoir 503 is charged with refrigerant. In this step, when the refrigerant in the thermosiphon receiver 502 reaches the overflow height, it is described that the refrigerant charge amounts in the thermosiphon receiver 502 and the thermosiphon oil cooler 509 satisfy the operation requirement of the compressor 508; the second discharge valve 22 is closed and the third discharge valve 23 is opened to fill the high-pressure accumulator 503 with refrigerant, while keeping the throttle valve 504 open.
S3: when the internal pressure of the high-pressure accumulator 503 is close to or equal to the internal pressure of the refrigerant container 1, the throttle valve 504 is closed or narrowed, and the third discharge valve 23 is closed; after cooling water is supplied to the condenser 501, the compressor 508 is started, the compressor 508 slowly increases the load several times, the internal pressure of the low-pressure circulation accumulator 505 is reduced, the pressure difference between the refrigerant container 1 and the low-pressure circulation accumulator 505 is increased, conditions are created for the refrigerant in the refrigerant container 1 to flow into the low-pressure circulation accumulator 505, and the refrigerant is simultaneously delivered from the low-pressure circulation accumulator 505 to the high-pressure accumulator 503 of the high-pressure part through the compressor 508; controlling the suction pressure of the compressor 508 not lower than 0.15MPa (absolute pressure) in the process; when the low-pressure circulation accumulator 505 is low in refrigerant pumping speed by the compressor 508, the refrigerant pump 506 can be started to supply refrigerant to the evaporator 507 and/or the number of the started compressors 508 is increased, so that the refrigerant is accelerated to be conveyed from the low-pressure circulation accumulator 505 to the high-pressure accumulator 503;
s4: opening the first refrigerant outlet valve 21, filling refrigerant into the low-pressure circulation liquid accumulator 505, observing the refrigerant liquid level in the high-pressure liquid accumulator 503 and the low-pressure circulation liquid accumulator 505, when the refrigerant liquid level in the high-pressure liquid accumulator 503 reaches 70% and the low-pressure circulation liquid accumulator 505 reaches a designed height (control height), the refrigerant filling amount of the thermosiphon oil cooling refrigeration system 5 meets the requirement, and then closing the refrigerant container 1. In this step, the designed height of the liquid level of the refrigerant in the high-pressure accumulator 503 is 70% of the total height, when the liquid level of the refrigerant in the high-pressure accumulator 503 reaches 70% first, the throttle valve 504 is opened or opened to accelerate the refrigerant to flow from the high-pressure accumulator 503 to the low-pressure circulation accumulator 505, and the height of the refrigerant in the high-pressure accumulator 503 is kept not to exceed 70%; while turning off some or all of the activated refrigerant pumps 506, reducing or stopping the supply of refrigerant to the evaporators 507, turning off some of the activated compressors 508 (reducing the load on the compressors 508 when only one compressor 508 is activated), and reducing the rate at which refrigerant is delivered from the low pressure cycle accumulator 505 to the high pressure accumulator 503.
The design level (control level) of the refrigerant in the low-pressure circulation accumulator 505 is 25% or 40% or 60% or 65%. For the thermosiphon oil cooling refrigeration system 5 adopting a high-inlet low-outlet refrigerant supply mode for the evaporator 507, after the refrigerant pump 506 stably operates for 15 minutes, the refrigerant height of the low-pressure circulation accumulator 505 can be controlled according to 25%, and after the refrigerant pump 506 stops operating for 15 minutes, the refrigerant height of the low-pressure circulation accumulator 505 can be controlled according to 65%; for the thermosiphon oil cooling refrigeration system 5 in which the evaporator 507 is in a low-inlet and high-outlet refrigerant mode, after the refrigerant pump 506 stably operates for 15 minutes, the refrigerant height of the low-pressure circulation accumulator 505 can be controlled by 40%, and after the refrigerant pump 506 stops operating for 15 minutes, the refrigerant height of the low-pressure circulation accumulator 505 can be controlled by 60%.
When the liquid level of the refrigerant in the low-pressure circulation accumulator 505 reaches a control level first, the throttle valve 504 is closed or opened to stop or reduce the flow of the refrigerant from the high-pressure accumulator 503 to the low-pressure circulation accumulator 505; simultaneously, a larger number of refrigerant pumps 506 can be started to supply refrigerant to the evaporator 507 and/or the number of the compressors 508 started is increased (when only one compressor 508 is started and the compressor 508 is not fully loaded, the load of the compressor 508 is increased), so that the speed of conveying the refrigerant from the low-pressure circulation accumulator 505 to the high-pressure accumulator 503 is increased; the opening degree of the first discharge valve 21 can also be reduced appropriately.
When the liquid level of the refrigerant in the high-pressure accumulator 503 reaches 70% and the low-pressure circulation accumulator 505 reaches a control level, the refrigerant charge amount of the refrigeration system meets the requirement, and the switch valve of the refrigerant container 1 is closed.
S5: the first refrigerant discharge valve 21 is fully opened, and the refrigerant in the distribution station 2, the main pipe 3, and the distribution pipe 4 is pumped into the low-pressure circulation accumulator 505 while keeping the compressor 508 open. In the process, the evaporation of the ammonia liquid in the distribution station 2 can be accelerated by wiping the frost on the surface of the distribution station 2 or spraying water on the surface of the distribution station 2.
S6: when the pressure gauge 24 is close to 0 and the frost formation on the surface of the distribution station 2 stops, it indicates that the ammonia liquid in the distribution station 2 has completely evaporated, and the agent inlet valve 31 and the compressor 508 on the main pipe 3 are closed. In this step, the pressure gauge 24 is observed, and when the pressure value of the pressure gauge 24 is close to 0, the chemical inlet valve 31 and the compressor 508 on the main pipe 3 are closed, so as to prepare for the next unloading work.
During the refrigerant charging process, an operator should perform approximate checking with the amount of the charged refrigerant according to the refrigerant level in the main liquid storage devices such as the thermosiphon liquid storage device 502, the high-pressure liquid storage device 503 and the low-pressure circulation liquid storage device 505, and the refrigerant containing amount in the pipe 510 and the evaporator 507 when the refrigerant pump 506 is running, and if the error is large, the opening and closing condition of the valve which should be opened by the charging device should be checked again. The refrigerant quantity charged for the first time is controlled according to 90% of the calculated charge quantity, and even if the refrigerant height in the high-pressure liquid storage device 503 and the low-pressure circulating liquid storage device 505 does not reach the height requirement, the charging is stopped, the test run is carried out, whether the charged refrigerant quantity meets the operation requirement or not is checked, and the excessive charging is avoided. If a second fill is necessary, the fill process is again performed as described above.
S7: the main pipe 3 is unloaded. In the step, the connecting flange of the agent inlet valve 31 and the main pipeline 3 is disassembled, a gap is slightly opened, and the refrigerant remained in the main pipeline 3 is slowly discharged (for Freon refrigerant, ventilation can be enhanced, Freon gas dissipation is accelerated, and for ammonia refrigerant, water mist can be sprayed to the filling position of the refrigerant to absorb ammonia). After the refrigerant in the main pipe 3 is completely released, the main pipe 3 is removed, and the distribution pipes 4 can also be removed, so that the filling equipment is completely removed for storage or filling for the next thermosiphon oil cooling refrigeration system 5.
In this embodiment, the main pipe 3 is connected to the distribution station 2 through a connection flange, and when the main pipe 3 is connected to the distribution station 2, the outflow state of the refrigerant in the refrigerant container 1 is detected, and the detection includes the following steps:
y1: a gap is reserved between the flange and the main pipeline 3;
y2: slightly opening a switch valve of the refrigerant container 1, and when white mist escapes from the gap, proving that the refrigerant in the refrigerant container 1 smoothly flows out;
y3: the flanges are tightened to tightly connect the main pipe 3 with the distribution station 2.
Refrigerant among the refrigerant container 1 is ammonia or freon, connect 3 one ends of trunk line in refrigerant container 1, the other end passes through flange joint with distribution station 2, leave the gap slightly, open the original ooff valve on advance agent valve 31 and the refrigerant container 1 a little, carefully observe gap department, if there is little white fog to escape, prove that the refrigerant can flow out smoothly, can flow out refrigerant container 1 smoothly confirming the refrigerant, and behind the air in the trunk line 3 of having discharged, screw up the flange, make trunk line 3 and distribution station 2 closely communicate.
In this embodiment, step S1 further includes detecting leakage of the refrigerant, and when the refrigerant in the refrigerant container 1 is freon, and the pressure of the thermosiphon oil cooling refrigeration system 5 reaches 0.2-0.3 Mpa, closing the second dispensing valve 22, and applying soap water to each connection of the filling device to perform leakage detection; when the refrigerant in the refrigerant container 1 is ammonia, when the pressure of the thermosiphon oil cooling refrigeration system 5 reaches 0.1-0.2 Mpa, the second agent outlet valve 22 is closed, and leakage detection is performed by enabling phenolphthalein or litmus test paper to be close to each connection part of the filling equipment. In this step, the refrigerant begins to fill and fills the back, should pay attention to the refrigerant condition of revealing, when the thermosiphon oil cooling refrigerating system 5's that fills the ammonia pressure reaches 0.1~0.2Mpa or fills the thermosiphon oil cooling refrigerating system 5's that fills freon pressure reaches 0.2~0.3Mpa, closes the second and goes out an agent valve 22, stops filling and annotates, carries out the leak hunting to filling equipment, three kinds are commonly used to the leak hunting mode: detecting leakage of soapy water, detecting leakage of a handheld leak detector, and detecting leakage of phenolphthalein or litmus test paper. The soapy water leakage detection method is suitable for Freon refrigerants, the soapy water is coated on welding positions and connecting positions of filling equipment during leakage detection, and leakage is observed when bubbles emerge. The leakage detection of the phenolphthalein or litmus test paper is suitable for ammonia refrigerants, the phenolphthalein or litmus test paper dipped in clear water is used during leakage detection, the phenolphthalein or litmus test paper moves slowly close to the joint of filling equipment and the welding part, the length of the test paper and the part to be detected to be leaked is not more than 5cm, and if the phenolphthalein test paper is red or the litmus test paper is blue, the leakage is detected. The leak detection of the hand-held leak detector is suitable for both ammonia refrigerants and Freon refrigerants, and the operation is carried out according to the instruction of the leak detection apparatus. And during leakage detection, careful observation is needed, a mark is made at a leakage position, leakage repairing is carried out after all detection is finished, and the refrigerant can be continuously filled after all leakage points are treated.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (9)
1. A refrigerant filling method of a thermosiphon oil cooling refrigeration system is characterized in that: a thermosiphon oil cooling refrigeration system (5) is filled with refrigerant by adopting filling equipment which mainly comprises a refrigerant container (1), a distribution station (2), a main pipeline (3) and three distribution pipelines (4), wherein the thermosiphon oil cooling refrigeration system (5) comprises a condenser (501), a thermosiphon liquid storage device (502), a high-pressure liquid storage device (503), a throttle valve (504), a low-pressure circulating liquid storage device (505), a refrigerant pump (506), an evaporator (507) and a compressor (508), the thermosiphon liquid storage device (502), the high-pressure liquid storage device (503), the throttle valve (504), the low-pressure circulating liquid storage device (505) and the compressor (508) are connected through a pipeline (510) in sequence to form a loop, the low-pressure circulating liquid storage device (505), the refrigerant pump (506) and the evaporator (507) are connected through the pipeline (510) in sequence to form another loop, and an, a first agent outlet valve (21), a second agent outlet valve (22), a third agent outlet valve (23) and a pressure gauge (24) are arranged on the distribution station (2), the first agent outlet valve (21), the second agent outlet valve (22) and the third agent outlet valve (23) are sequentially connected with a pipeline (510) between an evaporator (507) and a low-pressure circulation liquid storage device (505), a pipeline (510) between a condenser (501) and a thermosiphon liquid storage device (502) and a pipeline (510) between a high-pressure liquid storage device (503) and a throttle valve (504) through a distribution pipeline (4), one end of the main pipeline (3) is connected with the refrigerant container (1), and the other end of the main pipeline is connected with the distribution station (2), and the filling method comprises the following steps:
s1: the valves are closed, the refrigerant container (1) is opened, then the throttle valve (504), the refrigerant inlet valve (31) and the second refrigerant outlet valve (22) of the distribution station (2) are opened slowly, and the thermosiphon liquid storage device (502) is filled with refrigerant;
s2: when the refrigerating system of the thermosiphon liquid storage device (502) is filled, the second refrigerant outlet valve (22) is closed, the third refrigerant outlet valve (23) is opened, and the high-pressure liquid storage device (503) is filled with the refrigerating system;
s3: when the internal pressure of the high-pressure accumulator (503) is close to or even with that of the refrigerant container (1), closing the third refrigerant outlet valve (23), closing or reducing the throttle valve (504), opening the compressor (508) and reducing the internal pressure of the low-pressure circulation accumulator (505);
s4: opening a first refrigerant outlet valve (21), filling refrigerant into a low-pressure circulation liquid storage device (505), and closing a refrigerant container (1) when the refrigerant liquid level in the high-pressure liquid storage device (503) and the low-pressure circulation liquid storage device (505) reaches a designed height;
s5: fully opening the first agent outlet valve (21), keeping the compressor (508) open, and pumping the refrigerant in the distribution station (2), the main pipeline (3) and the distribution pipeline (4) into a low-pressure circulation liquid storage device (505);
s6: when the pressure gauge (24) is close to 0 and the surface of the distribution station (2) stops frosting, closing the agent inlet valve (31) and the compressor (508) on the main pipeline (3);
s7: -unloading the main pipe (3).
2. The method of filling a refrigerant in a thermosiphon oil cooling refrigeration system as recited in claim 1, wherein: the designed height of the refrigerant in the high-pressure accumulator (503) is 70% of the total height in the step S4, and the designed height of the refrigerant in the low-pressure circulation accumulator (505) is 25% or 40% or 60% or 65% of the total height.
3. The method of filling a refrigerant in a thermosiphon oil cooling refrigeration system as recited in claim 1, wherein: the main pipeline (3) is connected to the distribution station (2) through a connecting flange, when the main pipeline (3) is connected with the distribution station (2), the outflow state of the refrigerant in the refrigerant container (1) is detected, and the detection comprises the following steps:
y1: a gap is reserved between the flange and the main pipeline (3);
y2: a slightly opened refrigerant inlet valve (31) for proving that the refrigerant in the refrigerant container (1) flows out smoothly when white mist escapes from the gap;
y3: and screwing the flange to tightly communicate the main pipeline (3) with the distribution station (2).
4. The method of filling a refrigerant of a thermosiphon oil cooling refrigeration system according to any one of claims 1 to 3, wherein: the refrigerant in the refrigerant container (1) is ammonia or freon.
5. The method of filling a refrigerant in a thermosiphon oil cooling refrigeration system as recited in claim 4, wherein: the step S1 further comprises the step of detecting the leakage condition of the refrigerant, when the refrigerant in the refrigerant container (1) is Freon, and when the pressure of the thermosiphon oil cooling refrigeration system (5) reaches 0.2-0.3 Mpa, the second agent outlet valve (22) is closed, and the soap water is coated on each connection part of the filling equipment for leakage detection; when the refrigerant in the refrigerant container (1) is ammonia, when the pressure of the thermosiphon oil cooling refrigeration system (5) reaches 0.1-0.2 Mpa, the second agent outlet valve (22) is closed, and leakage detection is carried out by enabling phenolphthalein or litmus test paper to be close to each connection part of filling equipment.
6. The method of filling a refrigerant of a thermosiphon oil cooling refrigeration system according to any one of claims 1 to 3, wherein: and the suction pressure of the compressor (508) in the step S3 is not lower than 0.15 Mpa.
7. The method of filling a refrigerant in a thermosiphon oil cooling refrigeration system as recited in claim 6, further comprising: the refrigerant pump (506) is also turned on in step S3.
8. The method of filling a refrigerant of a thermosiphon oil cooling refrigeration system according to any one of claims 1 to 3, wherein: the main pipeline (3) is a rubber hose, and each distribution pipeline (4) is a seamless steel pipe.
9. The method of filling a refrigerant in a thermosiphon oil cooling refrigeration system as recited in claim 1, wherein: the distribution station (2) is also connected with a standby valve (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811094820.6A CN109140849B (en) | 2018-09-19 | 2018-09-19 | Refrigerant filling method of thermosiphon oil cooling refrigeration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811094820.6A CN109140849B (en) | 2018-09-19 | 2018-09-19 | Refrigerant filling method of thermosiphon oil cooling refrigeration system |
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| Publication Number | Publication Date |
|---|---|
| CN109140849A CN109140849A (en) | 2019-01-04 |
| CN109140849B true CN109140849B (en) | 2020-07-10 |
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| CN201811094820.6A Active CN109140849B (en) | 2018-09-19 | 2018-09-19 | Refrigerant filling method of thermosiphon oil cooling refrigeration system |
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| CN110849046A (en) * | 2019-12-12 | 2020-02-28 | 葛洲坝节能科技有限公司 | Refrigerating system and liquid storage assembly thereof |
| CN112146297B (en) * | 2020-09-22 | 2022-06-28 | 华商国际工程有限公司 | Refrigeration system and operation control method thereof |
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