CN111947354B - Oil separator, control method thereof and air conditioning unit - Google Patents
Oil separator, control method thereof and air conditioning unit Download PDFInfo
- Publication number
- CN111947354B CN111947354B CN202010911223.9A CN202010911223A CN111947354B CN 111947354 B CN111947354 B CN 111947354B CN 202010911223 A CN202010911223 A CN 202010911223A CN 111947354 B CN111947354 B CN 111947354B
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- Prior art keywords
- oil
- oil separator
- heating
- gas mixture
- assembly
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004378 air conditioning Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 239000000203 mixture Substances 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 82
- 239000003507 refrigerant Substances 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000010687 lubricating oil Substances 0.000 abstract description 5
- 238000004891 communication Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009987 spinning 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
- F25B43/003—Filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
-
- 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
-
- 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
Abstract
The application provides an oil separator, a control method thereof and an air conditioning unit. The oil separator comprises an oil cylinder body, an oil separation assembly and a heating assembly, wherein an air inlet and an air outlet are formed in the oil cylinder body, and the oil separation assembly is arranged in the oil cylinder body and is used for separating an oil-gas mixture entering through the air inlet. The heating assembly is arranged on the oil separation assembly and is used for heating the oil-gas mixture. By applying the technical scheme of the invention, in the process of separating the oil-gas mixture, if the exhaust temperature of the compressor is too low, the oil-gas mixture in the process of separating can be heated by the heating component, so that the temperature of the oil-gas mixture is increased, the liquid refrigerant in the oil-gas mixture is evaporated, the content of emulsified frozen oil is effectively reduced, and the oil-gas can be separated in normal yield. Meanwhile, the problem that the refrigerant is easy to carry lubricating oil and is deposited in the oil cylinder body at low exhaust temperature can be effectively avoided, so that the oil efficiency is improved, and the normal oil supply of the unit is ensured.
Description
Technical Field
The invention relates to the technical field of air conditioning components, in particular to an oil separator, a control method thereof and an air conditioning unit.
Background
The existing oil separators, whether they are two-stage or three-stage, have their separation efficiency based on normal exhaust temperatures. When the temperature of the exhaust gas of the compressor is reduced due to the suction liquid or low condensation temperature, the emulsified mixture of the refrigerating machine oil in the exhaust gas is easily generated, and the emulsified mixture mainly comprises liquid refrigerant and lubricating oil.
The above emulsified mixture, because of the existence of the components of the liquid refrigerant, can make the oil separator difficult to separate the frozen oil from the oil, and further lead to the oil separation efficiency of the oil separator to be greatly reduced, so that the lubricating oil in the unit is insufficient, the lubricating sealing effect of the unit is weakened, and moving parts are possibly worn when the situation is serious, so that the unit loses oil and is stopped due to faults, and the unit cannot work normally.
Disclosure of Invention
The embodiment of the invention provides an oil separator, a control method thereof and an air conditioning unit, which are used for solving the technical problem that a low-temperature oil-gas mixture cannot be effectively separated in the oil separator in the prior art.
The embodiment of the application provides an oil separator, which comprises: an oil content cylinder body, which is provided with an air inlet and an air outlet; the oil separation assembly is arranged in the oil separation barrel and is used for separating the oil-gas mixture entering the air inlet; and the heating assembly is arranged on the oil separation assembly and is used for heating the oil-gas mixture.
In one embodiment, the oil separator includes a bypass line having an input end in communication with the exhaust port and an output end in communication with the intake port.
In one embodiment, a bypass valve is arranged on the bypass pipeline, and the bypass valve is used for controlling the on-off or opening degree of the bypass pipeline.
In one embodiment, the exhaust port is provided with an exhaust valve for controlling the opening degree of the exhaust port.
In one embodiment, an air inlet is provided with an air inlet temperature sensor, the bypass valve controls the on-off or opening of the bypass pipeline according to the temperature detected by the air inlet temperature sensor, and the exhaust valve controls the opening of the exhaust port according to the temperature detected by the air inlet temperature sensor.
In one embodiment, the oil separation assembly comprises a swirl element and a first screen disposed below the swirl element, the swirl element being located at the location of the air inlet, the heating assembly comprising a first heating element disposed on the swirl element or the first screen.
In one embodiment, the heating assembly further comprises a second heating element, the first and second heating elements being disposed on the spin-on member and the first filter screen, respectively.
In one embodiment, the oil separation assembly further comprises a second screen disposed above the spinning component.
The application also provides a control method of the oil separator, wherein the control method is used for controlling the oil separator, and the control method comprises the following steps: detecting the air inlet temperature of an air inlet, and if the air inlet temperature is lower than a first preset value, opening a bypass pipeline and a heating assembly and reducing the opening of an air outlet; if the intake air temperature is higher than the second predetermined value, the bypass line and the heating assembly are closed, and the opening of the exhaust port is restored.
The application also provides an air conditioning unit, which comprises an oil separator, wherein the oil separator is the oil separator.
In the above embodiment, in the process of separating the oil-gas mixture, if the exhaust temperature of the compressor is too low, the oil-gas mixture in the process of separation can be heated by the heating component, so that the temperature of the oil-gas mixture is increased, the liquid refrigerant in the oil-gas mixture is evaporated, the emulsified frozen oil content is effectively reduced, and the oil-gas can be separated in normal yield. Meanwhile, the problem that the refrigerant is easy to carry lubricating oil and is deposited in the oil cylinder body at low exhaust temperature can be effectively avoided, so that the oil efficiency is improved, and the normal oil supply of the unit is ensured. In addition, through the technical scheme of the invention for treating the exhaust gas of the compressor, the temperature of the exhaust gas of the compressor can be increased, the oil supply temperature is increased, and the oil supply resistance is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic view of the external structure of an embodiment of an oil separator according to the present invention;
fig. 2 is a schematic cross-sectional view of the oil separator of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. The exemplary embodiments of the present invention and the descriptions thereof are used herein to explain the present invention, but are not intended to limit the invention.
Fig. 1 and 2 show an embodiment of an oil separator according to the present invention, which includes an oil cylinder 10, an oil separation unit 20, and a heating unit 30, wherein an air inlet 11 and an air outlet 12 are provided in the oil cylinder 10, and the oil separation unit 20 is provided in the oil cylinder 10 for separating an oil-gas mixture entering through the air inlet 11. A heating assembly 30 is provided on the oil separation assembly 20 for heating the oil and gas mixture.
By applying the technical scheme of the invention, in the process of separating the oil-gas mixture, if the exhaust temperature of the compressor is too low, the heating component 30 can be used for heating the oil-gas mixture in the process of separating, so that the temperature of the oil-gas mixture is increased, the liquid refrigerant in the oil-gas mixture is evaporated, the emulsified frozen oil content is effectively reduced, and the oil gas can be separated in normal yield. Meanwhile, the problem that the refrigerant is easy to carry lubricating oil and is deposited in the oil cylinder 10 at low exhaust temperature can be effectively avoided, so that the oil efficiency is improved, and the normal oil supply of a unit is ensured. In addition, through the technical scheme of the invention for treating the exhaust gas of the compressor, the temperature of the exhaust gas of the compressor can be increased, the oil supply temperature is increased, and the oil supply resistance is reduced.
As shown in fig. 2, as a preferred embodiment, the oil separator includes a bypass line 40, an input end of the bypass line 40 being in communication with the exhaust port 12, and an output end of the bypass line 40 being in communication with the intake port 11. If the temperature of the oil-gas mixture discharged from the exhaust port 12 is still low after being heated by the heating assembly 30, part of the oil-gas mixture in the exhaust port 12 can be returned to the air inlet 11 through the bypass line 40, and the heating assembly 30 can further heat and separate the oil-gas mixture. Preferably, the bypass line 40 is provided with a bypass valve 41, and the bypass valve 41 is used for controlling the on-off or opening degree of the bypass line 40. Alternatively, in the present embodiment, the bypass valve 41 is a solenoid valve, and as another alternative embodiment, the bypass valve 41 may be a shutoff valve. More preferably, a check valve 42 is further provided on the bypass line 40 to prevent the reverse flow of the mixture of air and fuel entering at the intake port 11 into the bypass line 40.
More preferably, in the present embodiment, the exhaust port 12 is provided with an exhaust valve 121, and the exhaust valve 121 is used to control the opening degree of the exhaust port 12. In this way, the effect of the bypass line 40 on the circulation heating can be increased by reducing the opening degree of the exhaust port 12.
Alternatively, in the solution of the present embodiment, the intake port 11 is provided with an intake air temperature sensor 111, the bypass valve 41 controls the on/off or the opening of the bypass line 40 according to the temperature detected by the intake air temperature sensor 111, and the exhaust valve 121 controls the opening of the exhaust port 12 according to the temperature detected by the intake air temperature sensor 111. By detecting the temperature of the mixture of oil and gas by the intake air temperature sensor 111, accurate control of increasing the temperature of the mixture of oil and gas can be achieved.
Optionally, in the solution of the present embodiment, the oil cylinder 10 is further provided with an oil supply port 13. Preferably, the oil separating assembly 20 comprises a swirl element 21, a first filter screen 22 arranged below the swirl element 21 and a second filter screen 23 arranged above the swirl element 21, the swirl element 21 being located at the inlet 11, the heating assembly 30 comprising a first heating element 31 and a second heating element 32, the first heating element 31 being arranged on the swirl element 21 and the second heating element 32 being arranged on the first filter screen 22. The oil-gas mixture discharged from the compressor enters through the air inlet 11, large oil drops are primarily separated through the rotary separation part 21, then are filtered through the first filter screen 22 for secondary separation, finally, the whole cycle is completed after being filtered through the second filter screen 23, and the filtered gas enters the condenser through the air outlet 12. The filtered oil enters an oil storage pool at the bottom of the oil barrel 10 and returns to the compressor through an oil supply port 13.
Optionally, the first filter 22 is a secondary filter, and the second filter 23 is a tertiary fine filter.
As an alternative, only the first heating element 31 may be provided without the second heating element 32, and the first heating element 31 may be provided on either the swirl element 21 or the first screen 22. This embodiment has a weaker heating capacity for the oil-gas mixture than the above embodiment.
As an alternative, it is also possible to provide only the first screen 22 and not the second screen 23, which is a relatively weak filtering capacity for oil and gas compared to the above-described embodiments.
Optionally, in the technical solution of this embodiment, in order to ensure that the first heating element 31 and the second heating element 32 can effectively transfer heat, gaps between the first heating element 31 and the second heating element 32 and the corresponding oil separation components are coated with appropriate heat-conducting silicone grease to perform effective heat transfer, so that the first heating element 31 and the second heating element 32 are prevented from being burnt due to high surface temperature. Alternatively, the first heating element 31 and the second heating element 32 are electric heating elements, and the surface load of the electric heating elements should not be greater than 2.5W/cm when the electric heating elements are selected 2 。
Optionally, as shown in fig. 1, the oil cylinder 10 is further provided with common components in an oil separator such as a safety valve 51, an exhaust gas temperature sensor 52, a high-level view mirror 53, a drain valve 54, an oil level switch 55, an oil temperature sensor 56, an oil electric heater 57, a low-level view mirror 58, and an oil injection valve 59.
The invention also provides a control method of the oil separator, which is used for controlling the oil separator and comprises the following steps: detecting an intake air temperature of the intake port 11, opening the bypass line 40 and the heating assembly 30, and decreasing the opening of the exhaust port 12 if the intake air temperature is lower than a first predetermined value; if the intake air temperature is higher than the second predetermined value, the bypass line 40 and the heating assembly 30 are closed, and the opening degree of the exhaust port 12 is restored. By applying the technical scheme of the invention, whether the heating component 30 and the bypass pipeline 40 are adopted or not can be automatically controlled according to the temperature of the inlet air, so that the automatic control of the oil separator is realized.
Specifically, in the technical scheme of the present embodiment, when the intake air temperature is detected to be lower than 50 ℃, the bypass line 40 is opened to reduce the opening of the exhaust port 12 to 50%, and at the same time, the heating element 30 is opened to heat the exhaust air temperature in a circulating manner. If the detected intake air temperature is equal to or greater than 55 deg., the bypass line 40 and the heating assembly 30 are closed, and the opening of the exhaust port 12 is restored to the fully open state.
The invention also provides an air conditioning unit comprising the oil separator. By applying the technical scheme of the invention, the oil-gas mixture can be fully separated, and further, the moving parts of the air conditioning unit can be fully lubricated.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations can be made to the embodiments of the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An oil separator, comprising:
an oil content cylinder (10), wherein an air inlet (11) and an air outlet (12) are arranged on the oil content cylinder (10);
an oil separation assembly (20) arranged in the oil separation barrel (10) and used for separating the oil-gas mixture entering the air inlet (11);
a heating assembly (30) disposed on the oil separation assembly (20) for heating the oil-gas mixture;
the oil separator comprises a bypass pipeline (40), wherein the input end of the bypass pipeline (40) is communicated with the exhaust port (12), and the output end of the bypass pipeline (40) is communicated with the air inlet (11).
2. -oil separator according to claim 1, characterised in that the bypass line (40) is provided with a bypass valve (41), which bypass valve (41) is used for controlling the opening or closing of the bypass line (40).
3. An oil separator according to claim 2, characterized in that the exhaust port (12) is provided with an exhaust valve (121), the exhaust valve (121) being adapted to control the opening of the exhaust port (12).
4. An oil separator according to claim 3, wherein an intake air temperature sensor (111) is provided on the intake port (11), the bypass valve (41) controls the on-off or opening of the bypass line (40) according to the temperature detected by the intake air temperature sensor (111), and the exhaust valve (121) controls the opening of the exhaust port (12) according to the temperature detected by the intake air temperature sensor (111).
5. -oil separator according to claim 1, characterised in that the oil separation assembly (20) comprises a swirl element (21) and a first screen (22) arranged below the swirl element (21), the swirl element (21) being located at the location of the air inlet (11), the heating assembly (30) comprising a first heating element (31), the first heating element (31) being arranged on the swirl element (21) or the first screen (22).
6. -oil separator according to claim 5, characterised in that the heating assembly (30) also comprises a second heating element (32), the first heating element (31) and the second heating element (32) being arranged on the swirl element (21) and the first sieve (22), respectively.
7. -oil separator according to claim 5, characterised in that the oil separation assembly (20) also comprises a second screen (23), which second screen (23) is arranged above the swirl element (21).
8. A control method of an oil separator, characterized by controlling the oil separator according to any one of claims 1 to 4, the control method comprising:
detecting an intake air temperature of an intake port (11), opening the bypass line (40) and the heating assembly (30) and decreasing the opening of the exhaust port (12) if the intake air temperature is lower than a first predetermined value; if the intake air temperature is higher than a second predetermined value, the bypass line (40) and the heating assembly (30) are closed, and the opening of the exhaust port (12) is restored.
9. An air conditioning unit comprising an oil separator, wherein the oil separator is an oil separator according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010911223.9A CN111947354B (en) | 2020-09-02 | 2020-09-02 | Oil separator, control method thereof and air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010911223.9A CN111947354B (en) | 2020-09-02 | 2020-09-02 | Oil separator, control method thereof and air conditioning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111947354A CN111947354A (en) | 2020-11-17 |
| CN111947354B true CN111947354B (en) | 2024-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010911223.9A Active CN111947354B (en) | 2020-09-02 | 2020-09-02 | Oil separator, control method thereof and air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111947354B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117469822B (en) * | 2023-12-27 | 2024-03-19 | 珠海格力电器股份有限公司 | Air conditioning unit, control method and storage medium |
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| GB576921A (en) * | 1944-04-22 | 1946-04-26 | Standard Pressed Steel Co | Improvements in or relating to refrigerating systems |
| JP2001027460A (en) * | 1993-12-28 | 2001-01-30 | Mitsubishi Electric Corp | Refrigeration cycle system |
| JP2008121926A (en) * | 2006-11-09 | 2008-05-29 | Mitsubishi Heavy Ind Ltd | Refrigeration air conditioner |
| CN202109707U (en) * | 2011-05-20 | 2012-01-11 | 林志辉 | Oil separator with electric heating device |
| CN104344613A (en) * | 2013-08-06 | 2015-02-11 | 珠海格力电器股份有限公司 | Oil separator |
| CN104422217A (en) * | 2013-08-27 | 2015-03-18 | 珠海格力电器股份有限公司 | Oil return control method for refrigerating system |
| CN105737467A (en) * | 2014-12-08 | 2016-07-06 | 天津市天元机械制造有限公司 | Refrigeration mixed liquor separation device |
| JP2016151381A (en) * | 2015-02-17 | 2016-08-22 | デンゲン株式会社 | Oil separator for refrigerant recovery charging |
| CN106969562A (en) * | 2016-01-13 | 2017-07-21 | 珠海格力电器股份有限公司 | Oil eliminator and the air-conditioning system with it |
| CN212362527U (en) * | 2020-09-02 | 2021-01-15 | 珠海格力电器股份有限公司 | Oil separator and air conditioning unit |
-
2020
- 2020-09-02 CN CN202010911223.9A patent/CN111947354B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB576921A (en) * | 1944-04-22 | 1946-04-26 | Standard Pressed Steel Co | Improvements in or relating to refrigerating systems |
| JP2001027460A (en) * | 1993-12-28 | 2001-01-30 | Mitsubishi Electric Corp | Refrigeration cycle system |
| JP2008121926A (en) * | 2006-11-09 | 2008-05-29 | Mitsubishi Heavy Ind Ltd | Refrigeration air conditioner |
| CN202109707U (en) * | 2011-05-20 | 2012-01-11 | 林志辉 | Oil separator with electric heating device |
| CN104344613A (en) * | 2013-08-06 | 2015-02-11 | 珠海格力电器股份有限公司 | Oil separator |
| CN104422217A (en) * | 2013-08-27 | 2015-03-18 | 珠海格力电器股份有限公司 | Oil return control method for refrigerating system |
| CN105737467A (en) * | 2014-12-08 | 2016-07-06 | 天津市天元机械制造有限公司 | Refrigeration mixed liquor separation device |
| JP2016151381A (en) * | 2015-02-17 | 2016-08-22 | デンゲン株式会社 | Oil separator for refrigerant recovery charging |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111947354A (en) | 2020-11-17 |
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