CN114992913B - Flooded refrigerating system - Google Patents
Flooded refrigerating system Download PDFInfo
- Publication number
- CN114992913B CN114992913B CN202210574478.XA CN202210574478A CN114992913B CN 114992913 B CN114992913 B CN 114992913B CN 202210574478 A CN202210574478 A CN 202210574478A CN 114992913 B CN114992913 B CN 114992913B
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- Prior art keywords
- gas
- oil
- liquid
- pipe
- ejector
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- 239000007788 liquid Substances 0.000 claims abstract description 117
- 238000000926 separation method Methods 0.000 claims abstract description 102
- 238000005057 refrigeration Methods 0.000 claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 9
- 238000005452 bending Methods 0.000 claims abstract description 6
- 238000000151 deposition Methods 0.000 claims description 17
- 230000008021 deposition Effects 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 48
- 239000010687 lubricating oil Substances 0.000 description 8
- 239000003595 mist Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000002309 gasification Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compressor (AREA)
Abstract
The invention relates to the field of refrigeration equipment, in particular to a flooded refrigeration system which comprises a main pipe, an evaporating pipe, an oil-gas separator and a compressor which are sequentially connected, wherein the oil-gas separator comprises an oil inlet pipe, an oil-gas separation cavity and an oil-gas separation pipe; the bending part of the oil-gas separation pipe is arranged at the lower part of the oil-gas separation cavity, and the side surface of the bending part is provided with an oil inlet. The invention sets up the oil-gas separator, make the deposited oil liquid steadily supply to the compressor after the gaseous Freon moves up; and arranging a gas-liquid separator and an ejector, inputting the oil liquid deposited between the main pipe and the evaporating pipe into a compressor, and converting liquid Freon in the oil liquid into gas by means of high-pressure hot gas discharged by the compressor to perform gas-liquid separation.
Description
Technical Field
The invention relates to the field of refrigeration equipment, in particular to a flooded refrigeration system.
Background
The flooded refrigeration system adopts the mutual dissolution of lubricating oil and liquid Freon, and refrigeration is completed through the Freon gasification process. In the existing refrigeration system, the freon gasifying process can carry lubricating oil to move upwards in an oil mist form, and then the oil mist is deposited, meanwhile, in the mixed liquid of the lubricating oil and the liquid freon, the condition of depositing the lubricating oil liquid exists, so that the condition that continuous and stable oil return cannot be caused, and the normal operation of the system is influenced.
Disclosure of Invention
The invention aims to solve the problems and provides a flooded refrigerating system, which adopts the following technical scheme:
the full-liquid type refrigerating system comprises a main pipe, an evaporating pipe, an oil-gas separator and a compressor which are sequentially connected, wherein the oil-gas separator comprises an oil inlet pipe, an oil-gas separation cavity and an oil-gas separation pipe, the oil inlet pipe is communicated with the oil-gas separation cavity, the oil-gas separation pipe is a U-shaped pipe, an air inlet of the oil-gas separation pipe is arranged in the oil-gas separation cavity and is communicated with the oil-gas separation cavity, and an air outlet of the oil-gas separation pipe is arranged outside the oil-gas separation cavity and is communicated with the compressor; the bending part of the oil-gas separation pipe is arranged at the lower part of the oil-gas separation cavity, and the side surface of the bending part is provided with an oil inlet.
On the basis of the scheme, an oil deposition cavity for depositing oil is connected between the main pipe and the evaporating pipe, the oil deposition cavity is communicated with the first ejector, and the first ejector is used for inputting the oil in the oil deposition cavity into the compressor.
On the basis of the scheme, the gas-liquid separator is connected between the first ejector and the compressor and comprises a gas-liquid separation cavity, a liquid inlet pipe and a gas-liquid separation pipe, two ends of the liquid inlet pipe are respectively communicated with an outlet of the first ejector and the gas-liquid separation cavity, an air inlet end of the gas-liquid separation pipe is arranged in the gas-liquid separation cavity, an air outlet end of the gas-liquid separation pipe is communicated with the compressor, the bottom of the gas-liquid separation cavity is communicated with the compressor through a second ejector, and the second ejector is used for inputting oil liquid at the bottom of the gas-liquid separation cavity into the compressor.
Based on the scheme, the air inlet end of the air-liquid separation tube is higher than the lower edge of the liquid inlet tube.
Preferably, the gas-liquid separation pipe is provided with an oil drain hole communicated with the gas-liquid separation cavity.
Preferably, the gas-liquid separator further comprises a heat exchange tube, the middle part of the heat exchange tube is arranged in the gas-liquid separation cavity, the two end parts of the heat exchange tube are arranged outside the gas-liquid separation cavity, and liquid with the temperature higher than room temperature is continuously input into the heat exchange tube.
Preferably, the first ejector and the second ejector are vented to exhaust from the compressor.
Preferably, the oil inlet holes are multiple in number and are arranged on two opposite sides of the oil-gas separation pipe on the same horizontal height.
Preferably, the first ejector and the second ejector are both provided with stop valves upstream.
The beneficial effects of the invention are as follows: setting an oil-gas separator to continuously and stably supply the deposited oil liquid after the gaseous freon is moved upwards into a compressor; the method comprises the steps of arranging a gas-liquid separator and an ejector, inputting oil liquid deposited between a main pipe and an evaporation pipe into a compressor, converting liquid Freon in the oil liquid into gas by means of high-pressure hot gas discharged by the compressor, and performing gas-liquid separation; after the refrigerating system is stopped, the ejector is utilized to clean deposited liquid in the main pipe and the oil liquid deposition cavity, so that normal operation after the system is restarted is facilitated.
Drawings
Fig. 1: the system principle of the invention is schematically shown;
fig. 2: the oil-gas separator is structurally schematic;
fig. 3: the structure of the gas-liquid separator is schematically shown.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
As shown in fig. 1 and 2, a flooded refrigeration system includes a main pipe 1, an evaporation pipe 3, an oil-gas separator 4, and a compressor 6, which are sequentially connected, and then pass through a condenser 7 and other devices. The oil-gas separator 4 comprises an oil inlet pipe 41, an oil-gas separation cavity 42 and an oil-gas separation pipe 43, wherein the oil inlet pipe 41 is communicated with the oil-gas separation cavity 42, a mixture of gaseous freon and oil mist particles is input into the oil-gas separation cavity 42 through the oil inlet pipe 41, the oil-gas separation pipe 43 is a U-shaped pipe, an air inlet 44 of the oil-gas separation pipe 43 is arranged in the oil-gas separation cavity 42 and is communicated with the oil-gas separation cavity 42, an air outlet 45 of the oil-gas separation pipe 43 is arranged outside the oil-gas separation cavity 42, and no other air exhaust channel is arranged in the oil-gas separation cavity 42. The oil-gas separation pipe 43 has a bent portion provided at a lower portion of the oil-gas separation chamber 42, and an oil inlet 46 is provided at a side surface of the bent portion. The mixture of gaseous Freon and oil mist particles enters the oil-gas separation cavity 42 through the oil inlet pipe 41, a part of oil mist mixed with gas is input from the air inlet 44, is discharged from the air outlet 45 after passing through the oil-gas separation pipe 43, and the rest of oil gradually falls down and deposits at the bottom of the oil-gas separation cavity 42, when the oil liquid level reaches or is higher than the position of the oil inlet hole 46, as shown by a horizontal dotted line in the figure, the oil enters the bottom of the oil-gas separation pipe 43 from the oil inlet hole 46 and is carried out by flowing gas, and meanwhile, the section of a gas flow path is reduced due to the rising of the oil liquid level in the oil-gas separation pipe 43, so that the gas flow rate is improved, and the working efficiency of a system is improved. The oil inlet holes 46 are provided in a plurality and are provided at the same level on opposite sides of the oil and gas separation pipe 43. The height of the air inlet 44 is higher than the height of the oil inlet pipe 41, and preferably, the dimension of the distance h between the air inlet 44 and the inner wall of the oil-gas separation chamber 42 above the air inlet is 1/4 of the diameter of the oil-gas separation chamber 42.
As shown in fig. 1 and 3, an oil deposition cavity 2 for depositing oil is connected between a main pipe 1 and an evaporation pipe 3, the oil deposition cavity 2 is communicated with a first ejector 81, and the first ejector 81 is used for inputting the oil in the oil deposition cavity 2 into a compressor 6 and discharging the liquid in the main pipe 1 and the oil deposition cavity 2 before the refrigeration system is stopped and restarted, so that the normal operation of the refrigeration system after restarting is facilitated. The gas-liquid separator 9 is connected between the first ejector 81 and the compressor 6, the gas-liquid separator 9 comprises a gas-liquid separation cavity 92, a liquid inlet pipe 91 and a gas-liquid separation pipe 93, two ends of the liquid inlet pipe 91 are respectively communicated with an outlet of the first ejector 81 and the gas-liquid separation cavity 92, an air inlet end of the gas-liquid separation pipe 93 is arranged in the gas-liquid separation cavity 92, an air inlet end of the gas-liquid separation pipe 93 is not arranged below the liquid inlet pipe 91, an oil drain hole 94 communicated with the gas-liquid separation cavity 92 is formed in the gas-liquid separation pipe 93, an air outlet end of the gas-liquid separation pipe 93 is communicated with the compressor 6, the bottom of the gas-liquid separation cavity 92 is communicated with the compressor 6 through a second ejector 82, and the second ejector 82 is used for inputting oil at the bottom of the gas-liquid separation cavity 92 into the compressor 6. Preferably, the first ejector 81 and the second ejector 81 are used for introducing exhaust gas from the compressor 6, and a stop valve 5 is arranged upstream of each of the first ejector 81 and the second ejector 82.
The first ejector 81 discharges the liquid mixture of the liquid freon and the lubricating oil in the oil liquid deposition cavity 2 into the liquid inlet pipe 91 of the gas-liquid separator 9, and the liquid inlet pipe 91 can be of a flat hole type structure or other structures. Since the first ejector 81 drives the liquid mixture to move by the high-pressure high-temperature gas from the compressor 6, in the moving process, the liquid freon absorbs heat to gasify, and after the gas-liquid mixture enters the gas-liquid separation chamber 92, the gaseous freon enters through the air inlet end of the gas-liquid separation tube 93 and is then discharged to the compressor 6, the liquid lubricating oil is accumulated at the bottom of the gas-liquid separation chamber 92, and the second ejector 82 inputs the lubricating oil into the compressor 6, and simultaneously thoroughly gasifies the liquid freon possibly remained therein. The air inlet end of the gas-liquid separation tube 93 is higher than the lower edge of the liquid outlet end of the liquid inlet tube 91, or the air inlet end of the gas-liquid separation tube 93 is arranged at different positions with the liquid outlet end of the liquid inlet tube 91 in a vertical plane, so that freon in the liquid mixture is fully gasified and then discharged through the gas-liquid separation tube 93, and the phenomenon that liquid in the liquid inlet tube 91 is directly discharged into the gas-liquid separation tube 93 or the liquid freon is not gasified thoroughly is avoided. The gaseous freon in the gas-liquid separation tube 93 is mixed with lubricating oil droplets in the form of oil mist and deposited in the gas-liquid separation tube 93, and the deposited oil in the gas-liquid separation tube 93 falls into the gas-liquid separation chamber 92 after passing through the oil drain hole 94, so that the gas-liquid separation tube 93 is prevented from being blocked due to the deposition of the oil.
Preferably, the gas-liquid separator 9 further comprises a heat exchange tube 95, the middle part of the heat exchange tube 95 is arranged in the gas-liquid separation cavity 92, the two end parts of the heat exchange tube 95 are arranged outside the gas-liquid separation cavity 92, liquid with the temperature higher than room temperature is continuously input into the heat exchange tube 95, heat exchange is carried out in the gas-liquid separation cavity 92 through the heat exchange tube 95, the gasification efficiency of liquid Freon is improved, and the problems of insufficient gasification and the like are avoided.
The present invention has been described above by way of example, but the present invention is not limited to the above-described embodiments, and any modifications or variations based on the present invention fall within the scope of the present invention.
Claims (7)
1. The full-liquid type refrigerating system is characterized by comprising a main pipe (1), an evaporating pipe (3), an oil-gas separator (4) and a compressor (6) which are sequentially connected, wherein the oil-gas separator (4) comprises an oil inlet pipe (41), an oil-gas separation cavity (42) and an oil-gas separation pipe (43), the oil inlet pipe (41) is communicated with the oil-gas separation cavity (42), the oil-gas separation pipe (43) is a U-shaped pipe, an air inlet (44) of the oil-gas separation pipe (43) is arranged in the oil-gas separation cavity (42) and is communicated with the oil-gas separation cavity (42), and an air outlet (45) of the oil-gas separation pipe (43) is arranged outside the oil-gas separation cavity (42) and is communicated with the compressor (6); the bending part of the oil-gas separation pipe (43) is arranged at the lower part of the oil-gas separation cavity (42), and the side surface of the bending part is provided with an oil inlet hole (46);
an oil deposition cavity (2) for depositing oil is connected between the main pipe (1) and the evaporation pipe (3), the oil deposition cavity (2) is communicated with a first ejector (81), and the first ejector (81) is used for inputting the oil in the oil deposition cavity (2) into the compressor (6);
the gas-liquid separator (9) is connected between the first ejector (81) and the compressor (6), the gas-liquid separator (9) comprises a gas-liquid separation cavity (92), a liquid inlet pipe (91) and a gas-liquid separation pipe (93), two ends of the liquid inlet pipe (91) are respectively communicated with an outlet of the first ejector (81) and the gas-liquid separation cavity (92), an air inlet end of the gas-liquid separation pipe (93) is arranged in the gas-liquid separation cavity (92), an air outlet end is communicated with the compressor (6), the bottom of the gas-liquid separation cavity (92) is communicated with the compressor (6) through a second ejector (82), and the second ejector (82) is used for inputting oil liquid at the bottom of the gas-liquid separation cavity (92) into the compressor (6).
2. A flooded refrigeration system as claimed in claim 1, wherein the gas-liquid separation tube (93) has a gas inlet end that is higher than the lower edge of the liquid inlet tube (91).
3. A flooded refrigeration system of claim 1, characterized in that a drain hole (94) is provided in the gas-liquid separation tube (93) in communication with the gas-liquid separation chamber (92).
4. The flooded refrigeration system of claim 1, wherein the gas-liquid separator (9) further comprises a heat exchange tube (95), the middle part of the heat exchange tube (95) is arranged in the gas-liquid separation cavity (92), the two end parts of the heat exchange tube are arranged outside the gas-liquid separation cavity (92), and liquid with the temperature higher than room temperature is continuously input into the heat exchange tube (95).
5. A flooded refrigeration system as claimed in claim 1, wherein the first ejector (81) and the second ejector (81) are vented from the compressor (6).
6. A flooded refrigeration system of claim 1, wherein the number of oil inlet holes (46) is plural and is arranged on opposite sides of the oil-gas separation tube (43) at the same level.
7. A flooded refrigeration system as claimed in claim 1, wherein a shut-off valve (5) is provided upstream of both the first ejector (81) and the second ejector (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210574478.XA CN114992913B (en) | 2022-05-25 | 2022-05-25 | Flooded refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210574478.XA CN114992913B (en) | 2022-05-25 | 2022-05-25 | Flooded refrigerating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114992913A CN114992913A (en) | 2022-09-02 |
| CN114992913B true CN114992913B (en) | 2023-11-21 |
Family
ID=83030308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210574478.XA Active CN114992913B (en) | 2022-05-25 | 2022-05-25 | Flooded refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114992913B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002130874A (en) * | 2000-10-19 | 2002-05-09 | Denso Corp | Refrigerating cycle device |
| CN204555461U (en) * | 2015-04-03 | 2015-08-12 | 潍坊三九冷暖设备科技有限公司 | Suction-jet type oil separating device and apply the refrigeration system of this device |
| JP2016211774A (en) * | 2015-05-07 | 2016-12-15 | ダイキン工業株式会社 | Freezer |
| CN113883749A (en) * | 2020-07-02 | 2022-01-04 | 青岛海尔空调电子有限公司 | Oil return system and air conditioning system with same |
| CN114508878A (en) * | 2021-08-23 | 2022-05-17 | 浙江正泰能效科技有限公司 | Separator and refrigerating unit fluid conditioning device |
-
2022
- 2022-05-25 CN CN202210574478.XA patent/CN114992913B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002130874A (en) * | 2000-10-19 | 2002-05-09 | Denso Corp | Refrigerating cycle device |
| CN204555461U (en) * | 2015-04-03 | 2015-08-12 | 潍坊三九冷暖设备科技有限公司 | Suction-jet type oil separating device and apply the refrigeration system of this device |
| JP2016211774A (en) * | 2015-05-07 | 2016-12-15 | ダイキン工業株式会社 | Freezer |
| CN113883749A (en) * | 2020-07-02 | 2022-01-04 | 青岛海尔空调电子有限公司 | Oil return system and air conditioning system with same |
| CN114508878A (en) * | 2021-08-23 | 2022-05-17 | 浙江正泰能效科技有限公司 | Separator and refrigerating unit fluid conditioning device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114992913A (en) | 2022-09-02 |
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