CN112013582B - Vapour and liquid returning protection device - Google Patents
Vapour and liquid returning protection device Download PDFInfo
- Publication number
- CN112013582B CN112013582B CN202010903793.3A CN202010903793A CN112013582B CN 112013582 B CN112013582 B CN 112013582B CN 202010903793 A CN202010903793 A CN 202010903793A CN 112013582 B CN112013582 B CN 112013582B
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- Prior art keywords
- pipe
- liquid
- outlet end
- return
- buffer
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- 239000007788 liquid Substances 0.000 title claims abstract description 72
- 238000001816 cooling Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000004108 freeze drying Methods 0.000 claims abstract description 4
- 239000000523 sample Substances 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 abstract description 5
- 239000003507 refrigerant Substances 0.000 description 28
- 239000003921 oil Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/06—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum the process involving freezing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a vapor-returning liquid-returning protection device, which is externally arranged on a condensing coil of a condenser of a freeze-drying refrigeration system, and comprises: the device comprises a liquid collecting pipe buffer, a horizontal pipe, a first U-shaped bent pipe, a vertical pipe, a second U-shaped bent pipe, a return-steam buffer pipe, a compressor, a water condenser, a liquid outlet pipe, a capillary pipe, a return-steam cooling control valve, two cooling valves connected in parallel at the outlet end of the liquid outlet pipe, two expansion valves and a liquid feeding pipe. According to the invention, the liquid collecting pipe buffer and the vapor return buffer pipe are additionally arranged at the outlet end of the condensing coil, so that the compressor is prevented from being damaged by liquid impact; meanwhile, a return steam cooling control valve and a capillary tube are additionally arranged, so that the return steam buffer tube is cooled under the condition of high return steam temperature, the cooling time is shortened, and the cost is reduced.
Description
Technical Field
The invention relates to a vapor return and liquid return protection device.
Background
In the refrigeration system of the freeze vacuum drier produced by factories at home and abroad at present, in order to prevent the liquid impact of the compressor when the air return end is at low temperature, a vapor-liquid separator device is additionally arranged on the vapor return pipeline of the compressor; when the return air is at high temperature, the refrigerating system is operated only by a compressor electromagnetic valve pulse mode; the refrigeration and vapor return system with the structure has several defects: 1. although the vapor-liquid separator device is arranged, the frozen oil cannot be vaporized, so that the potential trouble of the compressor caused by liquid impact cannot be completely avoided; 2. because the buffer is added, the difficulty is increased for identifying the opening size of the expansion valve, the potential hydraulic shock hazard of the press is not intuitive; 3. the cost of the vapor-liquid device is increased; 4. in the SIP sterilization cooling stage of the freeze dryer, the pipeline temperature is high, the compressor needs to refrigerate in a pulse mode of an electromagnetic valve, and the cooling period is long; 5. the temperature of the return steam is high, the return steam quantity is small, and particularly, the screw machine has no airflow driving force, has abnormal sound and is easy to damage.
Disclosure of Invention
The invention aims to solve the problems and provide the vapor return and liquid return protection device which can avoid the damage of liquid impact of a compressor and reduce the cost.
The purpose of the invention is realized in the following way:
the invention relates to a vapor-returning liquid-returning protection device which is externally arranged on a condensing coil of a condenser of a freeze-drying refrigeration system, comprising:
the inlet end of the liquid collecting pipe buffer is connected with the outlet end of the condensing coil;
the inlet end of the horizontal pipe is connected with the outlet end of the liquid collecting pipe buffer;
The inlet end of the first U-shaped bent pipe is connected with the outlet end of the horizontal pipe;
The inlet end of the vertical pipe is connected with the outlet end of the first U-shaped bent pipe;
The inlet end of the second U-shaped bent pipe is connected with the outlet end of the vertical pipe;
The inlet end of the steam return buffer tube is connected with the outlet end of the second U-shaped bent tube, the outlet end of the steam return buffer tube is connected with a compressor, the outlet end of the compressor is connected with a water condenser, and the outlet end of the water condenser is connected with a liquid outlet tube;
the inlet end of the capillary tube is connected with the liquid outlet pipe, the outlet end of the capillary tube is connected with the return steam buffer pipe, and the capillary tube is provided with a return steam cooling control valve;
Two cooling valves connected in parallel at the outlet end of the liquid outlet pipe;
The two expansion valves are connected with one cooling valve in a one-to-one correspondence manner; and
And the inlet end of the liquid conveying pipe is connected with the two expansion valves, and the outlet end of the liquid conveying pipe is connected with the inlet end of the condensing coil.
The vapor return and liquid return protection device is characterized in that a temperature probe is arranged on the vertical pipe.
The vapor return and liquid return protection device comprises a first U-shaped bent pipe, a second U-shaped bent pipe, a first liquid return pipe, a second liquid return pipe, a third liquid return pipe, a fourth liquid return pipe, a third liquid return pipe and a fourth liquid return pipe.
The steam return liquid protection device is characterized in that the inner diameter of the steam return buffer pipe is larger than the inner diameter of the second U-shaped bent pipe.
The above-mentioned vapour-returning liquid protection device, wherein, be equipped with an oil separator between compressor and the water condenser, the entry end of oil separator is connected to the exit end of compressor, and oil separator is equipped with two exit ends, and compressor is connected to an exit end of oil separator, and another exit end of oil separator is connected with the water condenser.
The vapor return liquid protection device is characterized in that the outlet end of the liquid collecting pipe buffer has an upward gradient of 2%, the horizontal pipe has a downward gradient of 1%, and the vapor return buffer pipe has an upward gradient of 1%.
The invention has the following advantages:
according to the invention, the liquid collecting pipe buffer and the vapor return buffer pipe are additionally arranged at the outlet end of the condensing coil, so that the refrigerant and the frozen oil can be timely and safely returned to the compressor after being buffered, and the compressor is prevented from being damaged by liquid impact; meanwhile, a return steam cooling control valve and a capillary tube are additionally arranged, so that the return steam buffer tube is cooled under the condition of high return steam temperature, the cooling time is shortened, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, there is shown a vapor-liquid return protection device of the present invention, which is externally arranged on a condensing coil 101 of a condenser 1 of a freeze-drying refrigeration system (not shown), and includes:
A liquid collecting pipe buffer 2, wherein the inlet end of the liquid collecting pipe buffer 2 is connected with the outlet end of the condensing coil 101;
The inlet end of the horizontal pipe 3 is connected with the outlet end of the liquid collecting pipe buffer 2;
the inlet end of the first U-shaped bent pipe 4 is connected with the outlet end of the horizontal pipe 3;
the inlet end of the vertical pipe 5 is connected with the outlet end of the first U-shaped bent pipe 4;
the inlet end of the second U-shaped bent pipe 6 is connected with the outlet end of the vertical pipe 5;
The inlet end of the return-air buffer tube 7 is connected with the outlet end of the second U-shaped bent tube 6, the outlet end of the return-air buffer tube 7 is connected with a compressor 8, the outlet end of the compressor 8 is connected with an oil separator 801, the oil separator 801 is provided with two outlet ends, one outlet end of the oil separator 801 is connected with the compressor 8, the other outlet end of the oil separator 801 is connected with a water condenser 9, and the outlet end of the water condenser 9 is connected with a liquid outlet pipe 10;
The inlet end of the capillary tube 11 is connected with the liquid outlet pipe 10, the outlet end of the capillary tube 11 is connected with the return-steam buffer pipe 7, and the capillary tube 11 is provided with a return-steam cooling control valve 12;
two cooling valves 13 connected in parallel at the outlet end of the liquid outlet pipe 10;
two expansion valves 14, each expansion valve 14 is connected with one cooling valve 13 in a one-to-one correspondence; and
And a liquid feeding pipe 15, wherein the inlet end of the liquid feeding pipe 15 is connected with the two expansion valves 14, and the outlet end of the liquid feeding pipe 15 is connected with the inlet end of the condensing coil 101.
The vertical pipe 5 is provided with a temperature probe 16.
The U-shaped opening of the first U-shaped bent pipe 4 faces upwards, and the U-shaped opening of the second U-shaped bent pipe 6 faces downwards.
The condensing coil 101 contains refrigerant (not shown) and a small amount of refrigerant oil (not shown) carried along with the compressor 8, and the refrigerant is partially vaporized after heat absorption. In the initial state, the temperature in the steam return buffer tube 7 is too high, at the moment, the steam return cooling control valve 12 is in an open state, the temperature of the steam return buffer tube 7 is rapidly reduced by inputting a refrigerant into the steam return buffer tube 7 through the capillary tube 11, the effect of rapid cooling is achieved, and after the steam return buffer tube 7 is cooled, the steam return cooling control valve 12 is closed. After the refrigerant in the condensing coil 101 starts absorbing heat, the refrigerant is partially vaporized, the compressor 8 is started, the vaporized refrigerant, unvaporized refrigerant and frozen oil enter the liquid collecting tube buffer 2, and then sequentially enter the horizontal tube 3, the first U-shaped bent tube 4, the vertical tube 5, the second U-shaped bent tube 6 and the vapor return buffer tube 7, the first U-shaped bent tube 4 and the second U-shaped bent tube 6 ensure that unvaporized refrigerant and frozen oil can smoothly flow into the vapor return buffer tube 7, and the inner diameter of the vapor return buffer tube 7 is larger than the inner diameter of the second U-shaped bent tube 6, so that the flow rate is reduced after unvaporized refrigerant and frozen oil flow into the vapor return buffer tube 7 from the second U-shaped bent tube 6, the buffer effect is achieved, and liquid impact on the compressor 8 is avoided when unvaporized refrigerant and frozen oil enter the compressor 8 from the vapor return buffer tube 7; the vaporized refrigerant, unvaporized refrigerant and frozen oil then enter the oil separator 801 from the compressor 8, after separation, the frozen oil flows back to the compressor 8 from one outlet end of the oil separator 801, the vaporized refrigerant and unvaporized refrigerant flow into the water condenser 9 from the other outlet end of the oil separator 801, after condensation, the vaporized refrigerant and unvaporized refrigerant are converted into low-temperature high-pressure liquid refrigerant, the low-temperature high-pressure liquid refrigerant flows into the cooling valve 13 through the liquid outlet pipe 10 and is converted into low-temperature low-pressure liquid refrigerant through the expansion valve 14, and finally flows back to the condensing coil 101; when the temperature probe 16 tests that the temperature of the vertical pipe 5 is too low, the refrigerant in the condensing coil 101 is not fully evaporated and gasified at the moment, a large amount of unvaporized refrigerant is arranged in the vertical pipe 5, and at the moment, one cooling valve 13 is closed, so that the flow rate of low-temperature low-pressure liquid-state refrigerant in the condensing coil 101 is reduced, the refrigerant in the condensing coil 101 is fully evaporated and gasified, the liquid amount of unvaporized refrigerant in the liquid-collecting pipe buffer 2 is reduced, the impact of the excessive liquid amount on the compressor 8 is avoided, and the use efficiency of the refrigerant in the condensing coil 101 is enhanced; the outlet end of the liquid collecting tube buffer 2 has an upward gradient of 2%, the horizontal tube 3 has a downward gradient of 1%, and the vapor return buffer tube 7 has an upward gradient of 1%, so that unvaporized refrigerant and frozen oil can more smoothly flow into the compressor 8, and liquid impact on the compressor 8 is avoided.
According to the invention, the liquid collecting pipe buffer 2 and the vapor return buffer pipe 7 are additionally arranged at the outlet end of the condensing coil 101, so that the refrigerant and the frozen oil can be timely and safely returned to the compressor 8 after being buffered; meanwhile, the return steam cooling control valve 12 and the capillary tube 11 are additionally arranged, so that the return steam buffer tube 7 is cooled under the condition of high return steam temperature, and meanwhile, the invention avoids the damage of the compressor 8 caused by liquid impact, shortens the cooling time and reduces the cost.
The above embodiments are provided for illustrating the present invention and not for limiting the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present invention, and thus all equivalent technical solutions should be defined by the claims.
Claims (4)
1. The utility model provides a vapour and liquid back protection device, vapour and liquid back protection device is external on the condensing coil of a freeze-drying machine refrigerating system's condenser, its characterized in that, vapour and liquid back protection device includes:
the inlet end of the liquid collecting pipe buffer is connected with the outlet end of the condensing coil;
The inlet end of the horizontal pipe is connected with the outlet end of the liquid collecting pipe buffer;
the inlet end of the first U-shaped bent pipe is connected with the outlet end of the horizontal pipe;
the inlet end of the vertical pipe is connected with the outlet end of the first U-shaped bent pipe;
The inlet end of the second U-shaped bent pipe is connected with the outlet end of the vertical pipe;
The inlet end of the steam return buffer tube is connected with the outlet end of the second U-shaped bent tube, the outlet end of the steam return buffer tube is connected with a compressor, the outlet end of the compressor is connected with a water condenser, and the outlet end of the water condenser is connected with a liquid outlet tube;
the inlet end of the capillary tube is connected with the liquid outlet pipe, the outlet end of the capillary tube is connected with the return-steam buffer pipe, and a return-steam cooling control valve is arranged on the capillary tube;
two cooling valves connected in parallel at the outlet end of the liquid outlet pipe;
the two expansion valves are connected with one cooling valve in a one-to-one correspondence manner; and
The inlet end of the liquid conveying pipe is connected with the two expansion valves, and the outlet end of the liquid conveying pipe is connected with the inlet end of the condensing coil;
the U-shaped opening of the first U-shaped bent pipe faces upwards, and the U-shaped opening of the second U-shaped bent pipe faces downwards;
the outlet end of the header buffer has an upward slope of 2%, the horizontal pipe has a downward slope of 1%, and the return buffer pipe has an upward slope of 1%.
2. The vapor return liquid protection device of claim 1, wherein a temperature probe is provided on the vertical tube.
3. The vapor return liquid protection device of claim 1, wherein an inner diameter of said vapor return buffer tube is greater than an inner diameter of said second U-bend.
4. The vapor return liquid protection device of claim 1, wherein an oil separator is disposed between said compressor and said water condenser, an outlet end of said compressor is connected to an inlet end of said oil separator, said oil separator is provided with two outlet ends, one outlet end of said oil separator is connected to said compressor, and the other outlet end of said oil separator is connected to said water condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010903793.3A CN112013582B (en) | 2020-09-01 | 2020-09-01 | Vapour and liquid returning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010903793.3A CN112013582B (en) | 2020-09-01 | 2020-09-01 | Vapour and liquid returning protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112013582A CN112013582A (en) | 2020-12-01 |
| CN112013582B true CN112013582B (en) | 2024-06-28 |
Family
ID=73516594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010903793.3A Active CN112013582B (en) | 2020-09-01 | 2020-09-01 | Vapour and liquid returning protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN112013582B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212274327U (en) * | 2020-09-01 | 2021-01-01 | 上海共和真空技术有限公司 | Vapour and liquid return protection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4621505A (en) * | 1985-08-01 | 1986-11-11 | Hussmann Corporation | Flow-through surge receiver |
| JPH07151399A (en) * | 1993-11-30 | 1995-06-13 | Sanyo Electric Co Ltd | Refrigerant circuit |
| CN105202833A (en) * | 2015-10-21 | 2015-12-30 | 合肥华凌股份有限公司 | Liquid storage device assembly for refrigeration system, refrigeration system comprising same and freezing cabinet |
| CN206352915U (en) * | 2016-11-21 | 2017-07-25 | 广东申菱环境系统股份有限公司 | A kind of liquid impact prevention refrigeration system |
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2020
- 2020-09-01 CN CN202010903793.3A patent/CN112013582B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212274327U (en) * | 2020-09-01 | 2021-01-01 | 上海共和真空技术有限公司 | Vapour and liquid return protection device |
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| CN112013582A (en) | 2020-12-01 |
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