CN102788449B - Air-conditioning - Google Patents
Air-conditioning Download PDFInfo
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- CN102788449B CN102788449B CN201210156529.3A CN201210156529A CN102788449B CN 102788449 B CN102788449 B CN 102788449B CN 201210156529 A CN201210156529 A CN 201210156529A CN 102788449 B CN102788449 B CN 102788449B
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- oil
- compressor
- oil return
- pipe
- air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/03—Oil level
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- 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)
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a kind of air-conditioning, wherein multiple compressor remains on constant level.This air-conditioning comprises multiple compressor being constructed to compressed refrigerant, multiplely be connected respectively to multiple compressor and be used for being separated the separator of the oil compressed within the compressor and comprise from the cold-producing medium that compressor is discharged, multiple being constructed to allows oil separated in multiple separator to return the oil return pipe of multiple compressor, multiplely be respectively installed to multiple oil return pipe to open or close the oil return valve of multiple oil return pipe respectively and to be constructed to make the interconnective blocker of multiple oil return pipe.The oil level that the present invention can make multiple compressor keep constant.
Description
The cross reference of related application
This application claims the priority enjoying No. 10-2011-0047170th, the korean patent application that on May 19th, 2011 submits to Korean Intellectual Property Office, its content is incorporated to by quoting in full at this.
Technical field
The present invention relates to a kind of air-conditioning, and relate more specifically to the air-conditioning that a kind of multiple compressors wherein maintain constant level.
Background technology
Usually, air-conditioning be via stand between room air and cold-producing medium to comprise compression, condensation, expansion and evaporation the heat exchange of refrigerant circulation cool and/or the device of heat interior spaces.Air-conditioning can be divided into by driving refrigerant circulation along assigned direction to the refrigeration air-conditioner of room supply cold air, and by optionally and bidirectionally driving refrigerant circulation to refrigeration, the cooling/heating air conditioner of room supply cold air and heating installation.
In addition, air-conditioning can be divided into the general air conditioning that single indoor unit is connected to single outdoor unit, and multiple indoor unit is connected to the compound air conditioner (multi-typeairconditioner) of at least one outdoor unit.
Compound air conditioner is typically used to the temperature optionally controlling the multiple spaces separated in such as building.For this reason, in compound air conditioner, can optionally operate according to whole air conditioning load the compressor needing quantity in multiple compressor.Particularly, if compressor is frequency-changeable compressor, then its compressed capability can be adjusted.
When to operate multiple frequency-changeable compressor simultaneously, each compressor has different oil extraction rates according to its operator scheme, therefore oil level there are differences.Oil starvation can cause compressor owing to breaking down for shortage of oil, and overboost can increase the power consumption of the motor internal of compressor, causes efficiency to decline.For this reason, making multiple compressor remain on constant level is major issue.
Summary of the invention
Therefore, provide the present invention in view of above problem, an object of the present invention is to provide a kind of air-conditioning, wherein multiple compressor keeps constant level.
Another object of the present invention is to provide a kind of air-conditioning, and wherein, the oil mass of each compressor to be returned controls according to the oil level of multiple compressor.
Effect of the present invention is not limited to above-mentioned effect, other effects that clear understanding is not mentioned from the content of claim of enclosing by those skilled in the art above.
According to a scheme of the present invention, above and other object is realized by providing a kind of air-conditioning, air-conditioning comprises multiple compressor being constructed to compressed refrigerant, multiple be connected respectively to multiple compressor and be used for being separated compressed within the compressor and the separator of the oil comprised from the cold-producing medium that compressor is discharged, multiple being constructed to allows oil separated in multiple separator to return the oil return pipe of multiple compressor, multiplely be respectively installed to multiple oil return pipe to open or close the oil return valve of multiple oil return pipe respectively and to be constructed to make the interconnective blocker of multiple oil return pipe.
Particularly, the invention provides a kind of air-conditioning, comprising: multiple compressor, is constructed to compressed refrigerant; Multiple separator, is connected respectively to described multiple compressor, and is used for being separated in described compressor the oil being compressed and comprise from the cold-producing medium that described compressor is discharged; Multiple oil return pipe, is constructed to allow separated oil in described multiple separator to return described multiple compressor; Multiple oil return valve, is respectively installed to described multiple oil return pipe, to open or close described multiple oil return pipe respectively; And capillary element, be constructed to described multiple oil return pipe is interconnected; Wherein, if described multiple oil return valve is opened entirely, then described capillary element prevents the oil returned from described multiple oil return pipe from converging, wherein, if some oil return valves in described multiple oil return valve are opened and other oil return valves are closed, then described capillary element allows the oil be separated in described multiple separator to flow to the oil return pipe being connected to the oil return valve be opened.
Accompanying drawing explanation
By the detailed description done below in conjunction with accompanying drawing, above object, other advantages of characteristic sum with other of the present invention more clearly can be understood, in accompanying drawing:
Fig. 1 is the schematic diagram of the structure that air-conditioning is according to an embodiment of the invention shown;
Fig. 2 is the partial, detailed view of air-conditioning according to an embodiment of the invention;
Fig. 3 is the partial, detailed view of air-conditioning according to another embodiment of the present invention.
Detailed description of the invention
With reference to the embodiment described in detail below in conjunction with accompanying drawing, advantages and features of the invention and the mode obtaining them will become obvious.But embodiments of the invention by much multi-form enforcement, and can should not be construed as the exemplary embodiment being limited to and proposing at this.Not equal to, these exemplary embodiments are provided, in order that make the present invention open thoroughly with complete, and intactly pass on scope of the present invention to those skilled in the art.Scope of the present invention should be defined by the claims.As long as can, refer to same or analogous parts by with identical Reference numeral in accompanying drawing.
Hereinafter, air-conditioning is according to an embodiment of the invention described with reference to the accompanying drawings in detail.
Fig. 1 is the schematic diagram of the structure that air-conditioning is according to an embodiment of the invention shown.
Outdoor unit OU comprises compressor 110, outdoor heat converter 140, outdoor expansion valve 132 and subcooler 180.Air-conditioning can comprise single or multiple outdoor unit OU, arranges single outdoor unit OU in the present embodiment.
Compressor 110 is used for the low temperature of introducing and the refrigerant compression of low pressure becomes high temperature and the cold-producing medium of high pressure.Compressor 110 can have one of multiple structure, and can adopt frequency-changeable compressor or constant-speed compressor.In the present embodiment, outdoor unit OU comprises multiple compressor 110, more specifically, comprises multiple frequency-changeable compressor, and its compressed capability can change according to its operator scheme.In the present embodiment, two frequency-changeable compressors 110 are set.
The suction line 162 of compressor 110 can be connected with accumulator 187, enters compressor 110 in order to prevent liquid refrigerant.
Multiple compressor 110 is connected respectively to multiple refrigerant discharge tube 172, is discharged from these refrigerant discharge tube 172 by the cold-producing medium compressed.Multiple refrigerant discharge tube 172 is connected respectively to multiple separator 171, these separators 171 separating oil from the cold-producing medium given off.Cold-producing medium, after multiple separator 171, is directed to cross valve 160 by multiple delivery pipe 161.The detailed configuration of multiple compressor 110 and multiple separator 171 is described with reference to Fig. 2 after a while.
Cross valve 160 is flow channel switching valves of a kind of flowing in order to switch cold-producing medium when freezing and heating.Compressed refrigerant in compressor 110 can be directed to outdoor heat converter 140 by inflow pipe 168 by cross valve 160 during cooling down operation, or can be directed to indoor heat converter 120 by by the cold-producing medium compressed by flue 169 during heating operation.Cross valve 160 is in state B during cooling down operation, and is in state A during heating operation.
During cooling down operation, the cold-producing medium of evaporation in indoor heat converter 120 is guided to cross valve 160 by flue 169, enables cold-producing medium flow to compressor.And during heating operation, flue 169 guides in compressor 110 and is flow to indoor heat converter 120 by the cold-producing medium compressed via cross valve 160.
Outdoor heat converter 140 is placed in the exterior space, carries out heat exchange through the cold-producing medium of outdoor heat converter 140 and outdoor air.Outdoor heat converter 140 plays the effect of condenser during cooling down operation, and during heating operation, play the effect of evaporimeter.Outdoor heat converter 140 is connected to liquid line 165 via effuser 166.
Outdoor expansion valve 132 act as the cold-producing medium regulating and be introduced into during heating operation, and is installed on effuser 166.First shunt valve 167 is installed on effuser 166, walks around outdoor expansion valve 132 in order to allow cold-producing medium; In turn, check-valves 133 is installed on the first shunt valve 167.
Check-valves 133 is during cooling down operation, and permission cold-producing medium outdoor heat exchanger 140 flows to multiple indoor unit IU; But during heating operation, interrupt the flowing of cold-producing medium.
Subcooler 180 comprised cool-heat-exchanger 184, second shunt valve 181, crossed cold expansion valve 182 and delivery pipe 185.Cross cool-heat-exchanger 184 to be positioned on effuser 166.During cooling down operation, the second shunt valve 181 can play the effect made from crossing the cold-producing medium inflow bypass that cool-heat-exchanger 184 discharges, and cold-producing medium is introduced cold expansion valve 182 thus.
Crossing cold expansion valve 182 is positioned on the second shunt valve 181, and be used for regulating the liquid refrigerant being introduced into the second shunt valve 181, to reduce the pressure and temperature of cold-producing medium, and after this, cross cold expansion valve 182 and the guide of produced cold-producing medium has been in cool-heat-exchanger 184.Crossing cold expansion valve 182 is any one in various types of expansion valve, can adopt linear expansion valve for convenience of user.
During cooling down operation, cross cool-heat-exchanger 184 through outdoor heat converter 140 condensating refrigerant and draw perform heat exchange between the low-temperature refrigerant of the second shunt valve 181, the cold cold-producing medium of consequent mistake flows to multiple indoor unit IU by liquid line 165.
After the cold-producing medium through the second shunt valve 181 carries out heat exchange in mistake cool-heat-exchanger 184, cold-producing medium is introduced into accumulator 187 by delivery pipe 185.
In air-conditioning according to an embodiment of the invention, each in multiple indoor unit IU comprises indoor heat converter 120, indoor blower 125 and indoor expansion valve 131.Air-conditioning can comprise single or multiple indoor unit IU, is provided with the first indoor unit IU (1) in the present embodiment to the 3rd indoor unit IU (3).
Indoor heat converter 120 is placed in the interior space, carries out heat exchange through the cold-producing medium of indoor heat converter 120 and room air.Indoor heat converter 120 plays the effect of evaporimeter during cooling down operation, and during heating operation, play the effect of condenser.Indoor heat converter 120 is connected to flue 169 via indoor outlet 164, and is connected to liquid line 165 via indoor inlet tube 163.
Indoor blower 125 is used for blowing the room air to carry out heat exchange in indoor heat converter 120 after.
Indoor inlet tube 163 is provided with indoor expansion valve 131.During cooling down operation, indoor expansion valve 131 is used for regulating the cold-producing medium be introduced into.Indoor expansion valve 131 is installed on the indoor inlet tube 163 of indoor unit IU.Indoor expansion valve 131 is any one in all kinds, can adopt linear expansion valve for user is convenient.
Fig. 2 is the partial, detailed view of air-conditioning according to an embodiment of the invention.
Air-conditioning according to an embodiment of the invention comprises: multiple compressor 110, in order to compressed refrigerant; Multiple separator 171, is connected respectively to multiple compressor 110, in order to be separated from compressor 110 discharge by the oil comprised compressed refrigerant; Multiple oil return pipe 177, the oil be separated in multiple separator 171 returns multiple compressor 110 through these oil return pipes; Multiple oil return valve 176, is installed on multiple oil return pipe 177 respectively, in order to open or close multiple oil return pipe 177 respectively; And blocker 175, be interconnected in order to make multiple oil return pipe 177.
As mentioned above, multiple compressor 110 is by the low temperature of introducing and the refrigerant compression of low pressure becomes high temperature and the cold-producing medium of high pressure.In the present embodiment, multiple compressor 110 comprises the first compressor 110 (1) and the second compressor 110 (2).First compressor 110 (1) and the second compressor 110 (2) are preferably frequency-changeable compressor, and its compressed capability can change according to operator scheme.
Compressor 110 comprises: cold-producing medium inlet port 111, wherein introduces cold-producing medium; Refrigerant outlet end 112, by its discharge by compressed refrigerant; Fuel level sensor 113, in order to measure the height of oil in compressor 110; And oil pump 114, enter compressor 110 in order to force the oil of introducing.
Cold-producing medium inlet port 111 is used for receiving the cold-producing medium of compressor 110 to be introduced, and is connected to suction line 162.Cold-producing medium inlet port 111 receives through the cold-producing medium of accumulator 187 from suction line 162.First compressor 110 (1) comprises the first cold-producing medium inlet port 111 (1), and the second compressor 110 (2) comprises second refrigerant inlet port 111 (2).
Refrigerant outlet end 112 is used for being emitted in compressor 110 by the cold-producing medium compressed.Refrigerant outlet end 112 is connected to refrigerant discharge tube 172.Refrigerant outlet end 112 in discharge by while the cold-producing medium that compresses, also from compressor 110 oil extraction.The refrigerating agent containing oil discharged from refrigerant outlet end 112 flows to separator 171 by refrigerant discharge tube 172.First compressor 110 (1) comprises the first refrigerant outlet end 112 (1), and the second compressor 110 (2) comprises the second refrigerant port of export 112 (2).
Fuel level sensor 113 measures the height of oil in compressor 110.Hold oil in compressor 110, oil is used for lubricating and cools the mechanical device needing compressed refrigerant.Oil is full of the bottom section of compressor 110, and is pumped during the driving of compressor 110.Fuel level sensor 113 measures the height being full of the oil of the bottom section of compressor 110.Determine to open or close oil return valve 176 according to the height of the oil measured by fuel level sensor 113.First compressor 110 (1) comprises the first fuel level sensor 113 (1), and the second compressor 110 (2) comprises the second fuel level sensor 113 (2).
Oil pump 114 is connected to oil return pipe 177, introduces compressor 110 to make oil.Oil pump 114 is placed in compressor 110, to be full of the bottom section of compressor 110 with oil.In compressor 110, oil pump 114 optimum position is lower than fuel level sensor 113.First compressor 110 (1) comprises the first oil pump 114 (1), and the second compressor 110 (2) comprises the second oil pump 114 (2).
Preferably, oil pump 114 is the Gerotor pumps (trochoidpump) pushing oil.Oil pump 114 is preferably arranged when high pressure compressor, and can omit when low pressure compressor.If compressor 110 is low pressure compressors, then preferred oil return pipe 177 is directly connected to compressor 110.
Alternatively, oil pump 114 can be integrally formed with the upwards pump oil of the bottom from compressor 110 in compressor 110, instead of arranges individually.Pump preferably upwards pushes the Gerotor pump of oil.Send along with oil is pushed upwardly in compressor 110, oil is in addition inhaled into compressor 110 from oil return pipe 177.In the case, oil return pipe 177 is not be directly connected to oil pump 114.
Separator 171 is separated the oil the cold-producing medium being included in and discharging from compressor 110.Multiple separator 171 is set to correspond respectively to multiple compressor 110.Multiple separator 171 comprises the first separator 171 (1) corresponding to the first compressor 110 (1) and the second separator 171 (2) corresponding to the second compressor 110 (2).
Separator 171 and compressor 110 are connected to refrigerant discharge tube 172.Multiple refrigerant discharge tube 172 is set to correspond respectively to multiple compressor 110.Multiple refrigerant discharge tube 172 is connected respectively to the refrigerant outlet end 112 of multiple compressor 110.Multiple refrigerant discharge tube 172 comprises making the first compressor 110 (1) with interconnective first refrigerant discharge tube 172 (1) of the first separator 171 (1) with in order to make the second compressor 110 (2) and the interconnective second refrigerant delivery pipe 172 (2) of the second separator 171 (2).
In separator 171, be therefrom separated fuel-displaced cold-producing medium be discharged in delivery pipe 161.Delivery pipe 161 is provided with multiple, and is connected respectively to multiple separator 171.Multiple delivery pipe 161 comprises the first delivery pipe 161 (1) being connected to the first separator 171 (1) and the second delivery pipe 161 (2) being connected to the second separator 171 (2).
The oil be separated in separator 171 is discharged in oil exit pipe 173.Oil exit pipe 173 is branched into oil return pipe 177 and remittance oil pipe 174.Oil exit pipe 173 is preferably provided with the check-valves preventing oil backflow.
Oil exit pipe 173 is provided with multiple, and is connected respectively to multiple separator 171, to be emitted on isolated oil in multiple separator 171 respectively.Multiple oil exit pipe 173 comprises the first row oil pipe 173 (1) being connected to the first separator 171 (1) and the second row oil pipe 173 (2) being connected to the second separator 171 (2).
Oil return pipe 177 is that the oil be separated in separator 171 flows through it and returns the pipe of compressor 110.Oil return pipe 177 makes oil exit pipe 173 and compressor 110 be interconnected.Oil return pipe 177 can be connected to compressor 110, to be directly connected to oil pump 114.
Oil return pipe 177 is provided with multiple, and is connected respectively to multiple oil exit pipe 173.Multiple oil return pipe 177 comprises to be made first row oil pipe 173 (1) with interconnective first oil return pipe 177 (1) of the first compressor 110 (1) and makes second row oil pipe 173 (2) and interconnective second oil return pipe 177 (2) of the second compressor 110 (2).
Oil return valve 176 is installed on oil return pipe 177, in order to open or close oil return pipe 177.Oil return valve 176 allows or interrupts oil separated in separator 171 to return compressor 110.Oil return valve 176 is controlled by fuel level sensor 113.More specifically, fuel level sensor 113 controls oil return valve 176, if thus oil level in the compressor 110 of correspondence is lower than fuel level sensor 113, then open oil return pipe 177; If the oil level in the compressor of correspondence 110 is higher than fuel level sensor 113, then close oil return pipe 177.
Oil return valve 176 is provided with multiple.Oil return valve 176 comprises the first oil return valve 176 (1) be installed on the first oil return pipe 177 (1) and the second oil return valve 176 (2) be installed on the second oil return pipe 177 (2).
If the oil level in the first compressor 110 (1) is lower than the first fuel level sensor 113 (1), then the first oil return valve 176 (1) is opened; If oil level is higher than the first fuel level sensor 113 (1), then the first oil return valve 176 (1) is closed.Similarly, if the oil level in the second compressor 110 (2) is lower than the second fuel level sensor 113 (2), then the second oil return valve 176 (2) is opened; If oil level is higher than the second fuel level sensor 113 (2), then the second oil return valve 176 (2) is closed.
Blocker 175 makes multiple oil return pipe 177 be interconnected.More specifically, blocker 175 makes the first oil return pipe 177 (1) be interconnected with the second oil return pipe 177 (2).Blocker 175 is connected to oil return pipe 177 via remittance oil pipe 174.
The oil pipe 174 that converges is provided with multiple, and these one end of converging oil pipe 174 are connected respectively to multiple oil exit pipe 173, and these other ends converging oil pipe 174 are connected to blocker 175.Multiple remittance oil pipe 174 comprises making the first oil return pipe 177 (1) and blocker 175 interconnective first to converge oil pipe 174 (1) and in order to make the second oil return pipe 177 (2) and blocker 175 interconnective second converge oil pipe 174 (2).
First remittance oil pipe 174 (1) allows the oil be separated in the first separator 171 (1) to flow to the second oil return pipe 177 (2), and the second remittance oil pipe 174 (2) allows the oil be separated in the second separator 171 (2) to flow to the first oil return pipe 177 (1).
Blocker 175 preferably adopts the form of capillary element, in order to when all multiple oil return valves 176 are opened, prevents the oil from multiple oil return pipe 177 from converging.If only have one to open in multiple oil return valve 176 and another is closed, then blocker 175 allows the oil discharged from multiple oil exit pipe 173 to flow into the oil return pipe 177 being provided with the oil return valve 176 opened together.
Hereinafter, the operation of the air-conditioning had according to above structure of the present invention will be described.
Discharged by each refrigerant outlet end 112 together with oil by the cold-producing medium compressed in multiple compressor 110.The cold-producing medium discharged from the refrigerant outlet end 112 of multiple compressor 110 and oil are introduced into multiple separator 171 by multiple refrigerant discharge tube 172.
Multiple separator 171 make cold-producing medium and oil separated from one another.In multiple separator 171 oil by the discharge refrigerant that is separated with it in multiple delivery pipe 161.The oil be separated in multiple separator 171 is discharged in multiple oil exit pipe 173.
According to the height of the oil in the compressor 110 measured by fuel level sensor 113, the oil be discharged in multiple oil exit pipe 173 represents different flow behaviors.
If aspect ratio first fuel level sensor 113 (1) of oil is low in the first compressor 110 (1), and aspect ratio second fuel level sensor 113 (2) of oil is high in the second compressor 110 (2), then the first oil return valve 176 (1) is opened and the second oil return valve 176 (2) is closed.In the case, the oil be separated in multiple separator 171 returns the first compressor 110 (1) completely.That is, first oil pump 114 (1) is operated, and returns the first compressor 110 (1) to make the oil be separated in the first separator 171 (1) via first row oil pipe 173 (1) and the first oil return pipe 177 (1).First oil pump 114 (1) is also operated, and returns the first compressor 110 (1) to make the oil be separated in the second separator 171 (2) via second row oil pipe 173 (2), second remittance oil pipe 174 (2), blocker 175, first remittance oil pipe 174 (1) and the first oil return pipe 177 (1).
If aspect ratio first fuel level sensor 113 (1) of oil is high in the first compressor 110 (1), and aspect ratio second fuel level sensor 113 (2) of oil is low in the second compressor 110 (2), then the first oil return valve 176 (1) is closed and the second oil return valve 176 (2) is opened.In the case, the oil be separated in multiple separator 171 returns the second compressor 110 (2) completely.That is, second oil pump 114 (2) is operated, and returns the second compressor 110 (2) to make the oil be separated in the second separator 171 (2) via second row oil pipe 173 (2) and the second oil return pipe 177 (2).And, second oil pump 114 (2) is operated, and returns the second compressor 110 (2) to make isolated oil in the first separator 171 (1) via first row oil pipe 173 (1), first remittance oil pipe 174 (1), blocker 175, second remittance oil pipe 174 (2) and the second oil return pipe 177 (2).
If aspect ratio first fuel level sensor 113 (1) of oil is low in the first compressor 110 (1), and aspect ratio second fuel level sensor 113 (2) of oil is low in the second compressor 110 (2), then the first oil return valve 176 (1) is opened and the second oil return valve 176 (2) is also opened.In the case, because blocker 175 prevents the oil returned from multiple oil return pipe 177 from converging, so the oil content be separated in multiple separator 171 does not return corresponding compressor 110.
Although the oil be separated in the first separator 171 (1) flows to the first remittance oil pipe 174 (1) by first row oil pipe 173 (1), but this flowing of oil is subject to the restriction of blocker 175, therefore, by the operation of the first oil pump 114 (1), under the first oil return valve 176 (1) open mode, oil returns the first compressor 110 (1) by the first oil return pipe 177 (1).And, although the oil be separated in the second separator 171 (2) flows to the second remittance oil pipe 174 (2) by second row oil pipe 173 (2), but the restriction of the stagnant device 175 of this constricted flow of oil, therefore by the operation of the second oil pump 114 (2), under the second oil return valve 176 (2) open mode, oil returns the second compressor 110 (2) by the second oil return pipe 177 (2).
Fig. 3 is the partial, detailed view of air-conditioning according to another embodiment of the present invention.
In the air-conditioning of the present embodiment, multiple oil return pipe 277 is connected respectively to the cold-producing medium inlet port 111 of multiple compressor 110.Multiple oil return pipe 277 comprises the first oil return pipe 277 (1) of the first cold-producing medium inlet port 111 (1) being connected to the first compressor 110 (1) and is connected to second oil return pipe 277 (2) of second refrigerant inlet port 111 (2) of the second compressor 110 (2).
Cold-producing medium inlet port 111 had both been connected to oil return pipe 277, was also connected to suction line 162.Therefore, move to the cold-producing medium of suction line 162 from accumulator 187 and be introduced in cold-producing medium inlet port 111 from the oil that separator 171 moves to oil return pipe 277.
In the case, compressor 110 becomes low pressure compressor, does not need oil pump 114.
In certain embodiments, multiple oil return pipe 277 can be connected to accumulator 187.
To it is apparent to those skilled in the art that the present invention can carry out various change and modification.Therefore, be intended that, as long as in the scope of following claims and equivalent thereof, the present invention covers change of the present invention and modification.
Claims (10)
1. an air-conditioning, comprising:
Multiple compressor, is constructed to compressed refrigerant;
Multiple separator, is connected respectively to described multiple compressor, and is used for being separated in described compressor the oil being compressed and comprise from the cold-producing medium that described compressor is discharged;
Multiple oil return pipe, is constructed to allow separated oil in described multiple separator to return described multiple compressor;
Multiple oil return valve, is respectively installed to described multiple oil return pipe, to open or close described multiple oil return pipe respectively; And
Capillary element, is constructed to described multiple oil return pipe is interconnected;
Wherein, described multiple compressor is all frequency-changeable compressor, and the compressed capability of described frequency-changeable compressor can change according to its operator scheme,
Wherein, each of described multiple compressor comprises the fuel level sensor being constructed to the height measuring oil in described compressor,
Wherein, if fuel level sensor is low described in aspect ratio oily in described compressor, then the described oil return valve being connected to described compressor is opened,
Wherein, if described multiple oil return valve is opened entirely, then described capillary element prevents the oil returned from described multiple oil return pipe from converging,
Wherein, if some oil return valves in described multiple oil return valve are opened and other oil return valves are closed, then described capillary element allows the oil be separated in described multiple separator to flow to the oil return pipe being connected to the oil return valve be opened.
2. air-conditioning according to claim 1, wherein, if fuel level sensor is high described in aspect ratio oily in described compressor, then the described oil return valve being connected to described compressor is closed.
3. air-conditioning according to claim 1, also comprises: multiple oil exit pipe, is connected respectively to described multiple separator, makes the oil be separated in described multiple separator be discharged into described oil exit pipe.
4. air-conditioning according to claim 3, wherein, described multiple oil return pipe is connected respectively to described multiple oil exit pipe.
5. air-conditioning according to claim 3, also comprises: multiple remittance oil pipe, is connected respectively to described multiple oil exit pipe, and described remittance oil pipe is also connected to described capillary element.
6. air-conditioning according to claim 1, wherein, each described compressor comprises oil pump; Described oil pump is connected to described oil return pipe, introduces described compressor to make oil.
7. air-conditioning according to claim 6, wherein, described oil pump is positioned at described compressor.
8. air-conditioning according to claim 1, wherein:
Described multiple compressor comprises cold-producing medium inlet port respectively, and cold-producing medium is introduced in described cold-producing medium inlet port; And
Described multiple oil return pipe is connected respectively to described cold-producing medium inlet port.
9. air-conditioning according to claim 8, wherein:
Described multiple compressor comprises refrigerant outlet end respectively, is discharged from described refrigerant outlet end by the cold-producing medium compressed; And
Described air-conditioning also comprises: multiple refrigerant discharge tube, is connected respectively to the refrigerant outlet end of described multiple compressor.
10. air-conditioning according to claim 1, also comprises: multiple delivery pipe, is connected respectively to described multiple separator, makes the discharge refrigerant be separated with oil in described multiple separator in described delivery pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110047170A KR20120129111A (en) | 2011-05-19 | 2011-05-19 | Air conditioner |
| KR10-2011-0047170 | 2011-05-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102788449A CN102788449A (en) | 2012-11-21 |
| CN102788449B true CN102788449B (en) | 2016-01-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210156529.3A Expired - Fee Related CN102788449B (en) | 2011-05-19 | 2012-05-18 | Air-conditioning |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20120291464A1 (en) |
| EP (1) | EP2525170B1 (en) |
| JP (1) | JP5596745B2 (en) |
| KR (1) | KR20120129111A (en) |
| CN (1) | CN102788449B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104567146B (en) * | 2013-10-23 | 2017-01-11 | 珠海格力电器股份有限公司 | Gas-liquid separator and air conditioner comprising same |
| EP3066402B1 (en) * | 2013-11-04 | 2018-10-31 | Carrier Corporation | Refrigeration circuit with oil separation |
| MX2016006780A (en) | 2013-11-25 | 2016-09-07 | Coca Cola Co | Compressor with an oil separator. |
| KR102198326B1 (en) * | 2013-12-26 | 2021-01-05 | 엘지전자 주식회사 | Air conditioner |
| US9939179B2 (en) * | 2015-12-08 | 2018-04-10 | Bitzer Kuehlmaschinenbau Gmbh | Cascading oil distribution system |
| US10969165B2 (en) | 2017-01-12 | 2021-04-06 | Emerson Climate Technologies, Inc. | Micro booster supermarket refrigeration architecture |
| WO2019021360A1 (en) * | 2017-07-25 | 2019-01-31 | 三菱電機株式会社 | Refrigeration cycle device |
| JP7199032B2 (en) * | 2018-07-30 | 2023-01-05 | パナソニックＩｐマネジメント株式会社 | air conditioner |
| KR20230114569A (en) * | 2022-01-25 | 2023-08-01 | 엘지전자 주식회사 | Compression system and laundry treating apparatus including the same |
| JP2024011228A (en) * | 2022-07-14 | 2024-01-25 | 三菱重工業株式会社 | refrigeration system |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2012242081A (en) | 2012-12-10 |
| JP5596745B2 (en) | 2014-09-24 |
| CN102788449A (en) | 2012-11-21 |
| KR20120129111A (en) | 2012-11-28 |
| US20120291464A1 (en) | 2012-11-22 |
| EP2525170A1 (en) | 2012-11-21 |
| EP2525170B1 (en) | 2020-04-15 |
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