CN105758066A - Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system - Google Patents
Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system Download PDFInfo
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- CN105758066A CN105758066A CN201610264887.4A CN201610264887A CN105758066A CN 105758066 A CN105758066 A CN 105758066A CN 201610264887 A CN201610264887 A CN 201610264887A CN 105758066 A CN105758066 A CN 105758066A
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- compressor
- oil
- opening
- line system
- premises station
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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
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses an outdoor unit of a variable refrigerant flow air-conditioning system and the variable refrigerant flow air-conditioning system.The outdoor unit comprises a main gas return pipe, a plurality of compressors and an oil separator, the compressors include the main compressor and the N auxiliary compressors, each compressor is provided with a gas return opening and an exhaust opening, the gas return opening of each compressor is connected with the main gas return pipe through a branch gas return pipe, the oil separator is provided with an inlet, an oil outlet and a discharge port, the inlet is connected with the exhaust opening of each compressor, a branch oil return pipeline is connected between each branch gas return pipe and the oil outlet, each branch oil return pipeline is connected with a first throttling device with a throttling and pressure reducing function in series, and the first throttling devices corresponding to the at least N-1 auxiliary compressors are constructed to have an opening and closing function, and each first throttling device with the opening and closing function is opened when the corresponding auxiliary compressor runs.By means of the outdoor unit, the oil return amounts of all the running compressors can be uniformly distributed.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, especially relate to off-premises station and the multiple on-line system of a kind of multiple on-line system.
Background technology
Multiple on-line system compared with traditional central air conditioner system, have that the saving energy, operating cost are low, save take sky ask,
Control advanced person, reliable, easy to maintenance, unit adaptability is good, cooling and warming temperature range width, design freedom are high,
The advantages such as convenient with charging are installed.Multiple on-line system particularly connected machine system is public at small and medium construction and part at present
Building obtains increasingly extensive application.
But due to design features such as pipeline length, elbow are many, the place of multiple on-line system trapped fuel is more, oil return difficulty.Along with many
The increase of on-line system duration of runs, in system, lubricating oil can be cumulative, ultimately results in the operating of compressor oil starvation.The most
On-line system must increase oil return system to ensure that multiple on-line system is safely and effectively run.
Multi-connected machine oil return system in correlation technique includes multiple compressors, the corresponding oil eliminator of every compressor, oil point
Multiple stream will be evenly distributed into after the oil return of device is collaborated and correspondence will be back to every compressor.But when in multiple compressors
When the most several compressors operate, this circuit is easily caused oil return distribution inequality, causes compressor oil starvation, sends out
Raw abrasion causes fault.
Other multi-connected machine oil return systems include multiple compressors, the corresponding same oil eliminator of multiple compressors, oil eliminator
Oil be passed straight back in the outlet of low-pressure tank, the oil return of oil eliminator carried out point by the air-breathing coolant quantity of every compressor
Stream.Multiple on-line system full load operation when, oil return can be carried out certain journey according to the air-breathing coolant quantity of every compressor
Evenly distributing of degree, but when the coolant distribution of low-pressure tank outlet is to time in every compressor, due to isocon (commonly two
Individual T-shaped pipe or two Y-pieces) process or the reason of Rig up error, easily make oil return cause bias current, cause the compression of oil starvation
Machine is because abrasion causes fault.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention proposes one
Plant the off-premises station of multiple on-line system, the recirculating oil quantity of each operating compressor can be evenly distributed, it is ensured that each operating pressure
The reliability service of contracting machine.
The present invention also proposes a kind of multiple on-line system, including the off-premises station of above-mentioned multiple on-line system.
The off-premises station of multiple on-line system according to embodiments of the present invention, including: main muffler；Multiple compressors, the plurality of
Compressor includes that main compressor and N number of auxiliary compressor, each described compressor have gas returning port and exhaust outlet, each described
The gas returning port of compressor is connected with described main muffler by sub-muffler, wherein N >=2；One oil eliminator, described oil divides
Include that entrance, oil export and floss hole, described entrance are connected with the exhaust outlet of each described compressor from device, each described son
It is connected between muffler with described oil export and has sub-return line, each described sub-return line is in series with there is reducing pressure by regulating flow
The first throttle device of function, the described first throttle device that the individual described auxiliary compressor of at least N-1 is corresponding is constructed having
Opening and closing function, each described first throttle device with opening and closing function is opened when corresponding described auxiliary compressor runs.
The off-premises station of multiple on-line system according to embodiments of the present invention, by making multiple compressor include main compressor and N number of auxiliary
Help compressor, and make the gas returning port of each compressor be connected with main muffler by sub-muffler, and make the entrance of oil eliminator
It is connected with the exhaust outlet of each compressor, and at every connexon return line between sub-muffler and oil export, and each
On sub-return line, series connection has the first throttle device of reducing pressure by regulating flow function, simultaneously by corresponding at least N-1 auxiliary compressor
First throttle device be configured with opening and closing function, thus when the off-premises station of multiple on-line system is used in multiple on-line system,
No matter multiple on-line system is in low load condition (main compressor work or main compressor work) with part auxiliary compressor, or
Full load condition (i.e. main compressor and all of auxiliary compressor all works), all can evenly distribute each operating compressor
Recirculating oil quantity, it is to avoid the generation of causing trouble because oil return inequality causes the few compressor of oil mass to produce abrasion, thus ensure each
The reliability service of individual compressor, and then be conducive to improving the service life of compressor.
According to some embodiments of the present invention, the described first throttle device that each described auxiliary compressor is corresponding is each configured to
There is opening and closing function.
According to some embodiments of the present invention, the described first throttle device that described main compressor is corresponding is constructed having opening and closing
Function.
According to some embodiments of the present invention, each described first throttle device with opening and closing function includes be connected in series
One capillary and the first control valve.
Specifically, described first control valve is magnetic valve.
According to some embodiments of the present invention, each described in have the first throttle device of opening and closing function be electric expansion valve.
According to some embodiments of the present invention, the off-premises station of multiple on-line system also includes supplementing return line, described supplementary oil return
The two ends of pipeline are connected with described oil export and described main muffler respectively, described supplementary return line is in series with and has throttling
Step-down and the second throttling arrangement of opening and closing function.
Specifically, described second throttling arrangement includes the second capillary and the second control valve being connected in series.
Further, described second control valve is magnetic valve.
Multiple on-line system according to embodiments of the present invention, including the off-premises station of above-mentioned multiple on-line system.
Multiple on-line system according to embodiments of the present invention, by arranging the off-premises station of above-mentioned multiple on-line system, regardless of multi-connected machine
System is in low load condition (main compressor work or main compressor work), or full load condition with part auxiliary compressor
(i.e. main compressor and all of auxiliary compressor all works), all can evenly distribute the recirculating oil quantity of each operating compressor,
Avoid wearing and tearing and the generation of causing trouble because oil return inequality causes the compressor that oil mass is few to produce, thus ensure each compressor
Reliability service, is conducive to improving the service life of compressor, and then is conducive to improving the service life of multiple on-line system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of multiple on-line system during main compressor operation according to some embodiments of the invention；
Fig. 2 is showing of multiple on-line system when main compressor according to some embodiments of the invention and the operation of part auxiliary compressor
It is intended to；
Fig. 3 is the schematic diagram of multiple on-line system during whole compressor operating according to some embodiments of the invention；
Fig. 4 is the schematic diagram of the multiple on-line system according to other embodiments of the present invention.
Reference:
Off-premises station 100；
First auxiliary compressor 1；Second auxiliary compressor 2；3rd auxiliary compressor 3；Main compressor 4；Exhaust outlet 5；
Gas returning port 6；Sub-muffler 61；Sub-return line 62；First throttle device 621；First capillary 6211；First
Control valve 6212；
Main muffler 7；
Oil eliminator 8；Entrance 81；Oil export 82；Floss hole 83；
Supplement return line 9；Second throttling arrangement 91；Second capillary 911；Second control valve 912.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings.Below with reference to accompanying drawing
The embodiment described is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " length ", " on ", D score, "front", "rear",
Orientation or the position relationship of the instruction such as "left", "right", " interior ", " outward " are based on orientation shown in the drawings or position relationship, are only
Specific side must be had for the ease of describing the present invention and simplification description rather than instruction or the device of hint indication or element
Position, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or
The implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or hidden
At least one this feature is included containing ground.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", the art such as " fixing "
Language should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be machinery
Connect, it is also possible to be electrical connection or each other can communication；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary,
Can be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For ability
For the those of ordinary skill in territory, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Below with reference to the off-premises station 100 of Fig. 1-Fig. 4 description multiple on-line system according to embodiments of the present invention, multiple on-line system
Off-premises station 100 can be used in multiple on-line system, and multiple on-line system is for freezing to indoor environment or heating.
As Figure 1-Figure 4, the off-premises station 100 of multiple on-line system according to embodiments of the present invention, can include main muffler 7,
Multiple compressors and an oil eliminator 8.
Specifically, multiple compressors include main compressor 4 and N number of auxiliary compressor.N >=2, say, that multiple compressions
Machine at least includes two auxiliary compressors.Wherein it is understood that when multiple on-line system is run, main compressor 4 begins
Running eventually, N number of auxiliary compressor then can select not run, partly run or all run according to actual condition.
Each compressor has gas returning port 6 and exhaust outlet 5, and thus, the refrigerant after heat exchange can be by the gas returning port 6 of compressor
Return to the compressor of correspondence, after refrigerant is compressed in corresponding compressor, the refrigerant of HTHP can be formed and from correspondence
Exhaust outlet 5 discharge.Such as, when only main compressor 4 and one of them auxiliary compressor run, the refrigerant after heat exchange
Main pressure can be returned to respectively respectively through the gas returning port 6 of the gas returning port 6 of main compressor 4 and one of them auxiliary compressor described
Contracting machine 4 and one of them auxiliary compressor described, refrigerant is difference in main compressor 4 and one of them auxiliary compressor described
After compressing, discharge from the exhaust outlet 5 of main compressor 4 and the exhaust outlet 5 of one of them auxiliary compressor described respectively.
The gas returning port 6 of each compressor is connected with main muffler 7 by sub-muffler 61, say, that main compressor 4
Gas returning port 6 is connected with main muffler 7 by corresponding sub-muffler 61 respectively with the gas returning port 6 of each auxiliary compressor simultaneously.
Thus, the refrigerant after heat exchange flows to main muffler 7, and respectively through the sub-muffler corresponding with each operating compressor
61 and gas returning port 6 return to correspondence compressor in.
As Figure 1-Figure 4, oil eliminator 8 includes entrance 81, oil export 82 and floss hole 83, entrance 81 and each pressure
The exhaust outlet 5 of contracting machine is connected, and there is sub-return line 62 every individual connection between sub-muffler 61 and oil export 82, and every height returns
The first throttle device 621 with reducing pressure by regulating flow function it is in series with to reduce the lubrication flowing into corresponding compressor on oil pipe line 62
The temperature of oil, thus, when lubricating oil is discharged from oil export 82, is conducive to utilizing the gas returning port of each compressor operating
Pressure differential between 6 and the exhaust outlet 5 of correspondence is uniformly distributed flowing into the recirculating oil quantity of each compressor, it is ensured that compressor can
By running.
The first throttle device 621 that at least N-1 auxiliary compressor is corresponding be constructed having opening and closing function so that control with
The break-make of the sub-return line 62 that auxiliary compressor is corresponding.It is to say, the first throttle dress that N-1 auxiliary compressor is corresponding
Put 621 and be constructed having opening and closing function, or first throttle device 621 corresponding to N number of auxiliary compressor is configured to tool
There is opening and closing function to reduce the bypass amount of refrigerant.Wherein it is desired to explanation, when only N-1 auxiliary compressor is corresponding
Another auxiliary compressor that first throttle device 621 is constructed having in the most N number of auxiliary compressor of opening and closing function is corresponding
First throttle device 621 does not have opening and closing function, and when at least one auxiliary compressor in multiple on-line system runs, on
State another auxiliary compressor (i.e. corresponding with the first throttle device 621 without opening and closing function auxiliary compressor) inevitable
Run.Thus, when in multiple on-line system, only main compressor 4 and another auxiliary compressor above-mentioned run, other auxiliary
There is on compressor the setting of the first throttle device 621 of opening and closing function, can make from the isolated lubricating oil of oil eliminator 8
All flow in main compressor 4 and another auxiliary compressor above-mentioned, it is to avoid produce bias current.
It is understood that each first throttle device 621 with opening and closing function is opened when corresponding auxiliary compressor runs
Open, in order to after oil eliminator 8 isolated lubricating oil current-sharing, be back to the auxiliary of correspondence through corresponding sub-return line 62
Help in compressor.
Specifically, (such as, all of compressor all works or main compressor 4 and part auxiliary compressor compressor operating
Work or only main compressor 4 work) time, the refrigerant being mixed with lubricating oil discharged from compressor can be from corresponding exhaust outlet
5 discharge, and flow into oil eliminator 8 by entrance 81, be mixed with the refrigerant of lubricating oil realize in oil eliminator 8 refrigerant and
The separation of lubricating oil, the refrigerant of isolated HTHP flows into refrigerant circulation circuit from floss hole 83, and isolated profit
Lubricating oil is then discharged from oil export 82, and may utilize the row of each operating compressor from the isolated lubricating oil of oil eliminator 8
Gas port 5 and the pressure differential of corresponding gas returning port 6 so that isolated lubricating oil the most all flows to the sub-return line 62 of correspondence
In, and pass through corresponding sub-muffler 61 and through corresponding gas returning port 6 together with the refrigerant in corresponding sub-muffler 61
Return in the compressor of correspondence to evenly distribute the recirculating oil quantity of each operating compressor, it is to avoid because oil return inequality causes oil
Measure few compressor generation to wear and tear and the generation of causing trouble, thus ensure the reliability service of each compressor
The off-premises station 100 of multiple on-line system according to embodiments of the present invention, by making multiple compressor include main compressor 4 and N
Individual auxiliary compressor, and make the gas returning port 6 of each compressor be connected with main muffler 7 by sub-muffler 61 respectively, and make
The entrance 81 of oil eliminator 8 is connected with the exhaust outlet 5 of each compressor, and every sub-muffler 61 and oil export 82 it
Between connexon return line 62, and series connection has the first throttle device of reducing pressure by regulating flow function on every sub-return line 62
621, first throttle device 621 corresponding at least N-1 auxiliary compressor is configured with opening and closing function simultaneously, thus works as
When the off-premises station 100 of multiple on-line system is used in multiple on-line system, no matter multiple on-line system is in low load condition (main compression
Machine 4 works or main compressor 4 works with part auxiliary compressor), or full load condition (i.e. main compressor 4 and all of
Auxiliary compressor all works), all can evenly distribute the recirculating oil quantity of each operating compressor, it is to avoid because oil return inequality causes oil
Measure few compressor generation to wear and tear and the generation of causing trouble, thus ensure the reliability service of each compressor, be conducive to improving
The service life of compressor.
According to some embodiments of the present invention, the first throttle device 621 that each auxiliary compressor is corresponding is each configured to be had
Opening and closing function, so that each first throttle device 621 controls the break-make of the sub-return line 62 of correspondence, thus, works as multi-connected machine
When system is in underrun state, part or all of auxiliary compressor does not works, and divides with part or all of auxiliary compressor
The closedown of not corresponding first throttle device, advantageously reduces the bypass amount of refrigerant, and when multiple on-line system only has main pressure
When contracting machine 4 and one of them auxiliary compressor run, the closedown of the first throttle device corresponding with other auxiliary compressor, have
It is beneficial to all flow to compressor and one of them auxiliary compressor from the isolated lubricating oil of oil eliminator 8, it is to avoid produce bias current.
According to some embodiments of the present invention, the first throttle device 621 of main compressor 4 correspondence is constructed having opening and closing merit
Can, thus, when the lubricants capacity in main compressor 4 is more, and without during oil return, closing with main in main compressor 4
The first throttle device 621 of compressor 4 correspondence, and close the first throttle device 621 corresponding with main compressor 4 and also may be used
To reduce the bypass amount of refrigerant.
In some embodiments of the invention, each first throttle device 621 with opening and closing function includes be connected in series
One capillary 6211 and the first control valve 6212, thus simple in construction, reliable.Certainly, the invention is not restricted to this, at it
In its embodiment, each first throttle device 621 with opening and closing function is electric expansion valve.
Specifically, the first control valve 6212 is magnetic valve, thus, simple and reliable.
According to some embodiments of the present invention, the off-premises station 100 of multiple on-line system also includes supplementing return line 9, supplements oil return
The two ends of pipeline 9 are connected with oil export 82 and main muffler 7 respectively, thus, flow out from the oil export 82 of oil eliminator 8
Lubricating oil can the most all flow in each the sub-oil return pipe corresponding with operating compressor and supplementary return line 9, each
Lubricating oil in sub-return line 62 can be directly over the sub-muffler 61 of correspondence and flow in corresponding operating compressor,
The lubricating oil supplemented in return line 9 then flows first to main muffler 7, and all flows to respectively with the refrigerant in main muffler 7
In individual sub-muffler 61, and eventually flow in the operating compressor of correspondence to realize operating compressor is quickly returned
Oil.
Specifically, as Figure 1-Figure 4, supplement to be in series with on return line 9 and there is reducing pressure by regulating flow and the second of opening and closing function
Throttling arrangement 91, thus the lubricating oil flowing through supplementary return line 9 is lowered the temperature and control supplement return line 9 break-make,
It is advantageously implemented the quick oil return to each operating compressor by controlling opening of the second throttling arrangement 91.
Further, multiple on-line system can also include controller, and controller can control unlatching and the pass of second section stream device 91
Close.Such as, every 30 minutes control the second throttling arrangements 91 of controller open two minutes intermittently to realize operating
The quick oil return of compressor, it is ensured that the lubricants capacity needed for operating compressor.
Further, the second throttling arrangement 91 includes the second capillary 911 and the second control valve 912 being connected in series.Certainly,
The invention is not restricted to this, in other embodiments, each second throttling arrangement 91 with opening and closing function can also be swollen for electronics
Swollen valve.Specifically, the second control valve 912 is magnetic valve, simple and reliable.
Below with reference to Fig. 1-Fig. 4, structure and the operation principle of the off-premises station 100 of the multiple on-line system of the embodiment of the present invention are carried out
Describe in detail.
Embodiment 1
As shown in Figure 1-Figure 3, the off-premises station 100 of the multiple on-line system in the present embodiment, including 7, main pressure of main muffler
Contracting machine 4, supplement return line 9 and two auxiliary compressors (i.e. first auxiliary compressor 1 and the second auxiliary compressor 2) and
One oil eliminator 8.
Each compressor has gas returning port 6 and exhaust outlet 5, and the gas returning port 6 of each compressor is by corresponding sub-muffler 61
It is connected with main muffler 7.
Oil eliminator 8 includes entrance 81, oil export 82 and floss hole 83, exhaust outlet 5 phase of entrance 81 and each compressor
Even, there is sub-return line 62 every individual connection between sub-muffler 61 and oil export 82.Connect on every sub-return line 62
There is the first throttle device 621 with reducing pressure by regulating flow function to reduce the temperature of the lubricating oil flowing into corresponding compressor.
The first throttle device 621 corresponding with the second auxiliary compressor 2 is constructed having opening and closing function, with the first auxiliary pressure
The first throttle device 621 of contracting machine 1 correspondence does not have opening and closing function.Certainly, in further embodiments, with the first auxiliary
The first throttle device 621 of compressor 1 correspondence is also configurable to have opening and closing function so that the first throttle device of correspondence
621 control the break-make of the sub-return line 62 corresponding with the first auxiliary compressor 1 to reduce the bypass amount of refrigerant.
The two ends supplementing return line 9 are connected with oil export 82 and main muffler 7 respectively, supplement and are in series with on return line 9
Having the second throttling arrangement 91 of reducing pressure by regulating flow and opening and closing function, the second throttling arrangement 91 includes the second capillary being connected in series
Pipe 911 and the second control valve 912.Second control valve 912 is magnetic valve.
Specifically, as it is shown in figure 1, when in multiple on-line system, only main compressor 4 runs, with the second auxiliary compressor 2
Corresponding first throttle device 621 is closed reducing the bypass amount of refrigerant.It is, of course, understood that when only
When having main compressor 4 to run, the first throttle device 621 corresponding with the second auxiliary compressor 2 can also be in open mode.
Can be divided into two-way stream from the isolated lubricating oil of oil eliminator 8, wherein a road stream flows to corresponding with main compressor 4
Sub-return line 62 also flows to main compressor 4 through corresponding sub-muffler 61, and another road stream flows to and the first auxiliary pressure
The sub-return line 62 of contracting machine 1 correspondence, and return through sub-return line 62 flow direction son corresponding with the first auxiliary compressor 1
Tracheae 61, lubricating oil reverse flow in sub-muffler 61 is passed to main muffler 7, and eventually pass through right with main compressor 4
The sub-muffler 61 answered flows to main compressor 4.
As in figure 2 it is shown, when in multiple on-line system, main compressor 4 and the first auxiliary compressor 1 run simultaneously, auxiliary with second
The first throttle device 621 helping compressor 2 correspondence is closed, and can divide equally from the isolated lubricating oil of oil eliminator 8
Becoming two-way stream, wherein a road stream flows to the sub-return line 62 corresponding with main compressor 4 and through corresponding sub-muffler
61 flow to main compressor 4, and another road stream flows to the sub-return line 62 corresponding with the first auxiliary compressor 1, and process with
The sub-muffler 61 of the first auxiliary compressor 1 correspondence flows to the first auxiliary compressor 1.Herein it is understood that make and the
The first throttle device 621 of two auxiliary compressor 2 correspondences is closed avoiding corresponding with the second auxiliary compressor 2
Lubricating oil bias current in sub-return line 62.
As it is shown on figure 3, when main compressor the 4, first auxiliary compressor 1 and the second auxiliary compressor 2 in multiple on-line system while
During operation, the first throttle device 621 corresponding with the second auxiliary compressor 2 is in open mode, separates from oil eliminator 8
The lubricating oil gone out can be divided into three road streams, and wherein a road stream flows to the sub-return line 62 corresponding with main compressor 4 warp
The sub-muffler 61 crossing correspondence flows to main compressor 4, and another road stream flows to the sub-oil return corresponding with the first auxiliary compressor 1
Pipeline 62, and flow to the first auxiliary compressor 1, last road through the sub-muffler 61 corresponding with the first auxiliary compressor 1
Stream flows to the sub-return line 62 corresponding with the second auxiliary compressor 2, and through the son corresponding with the second auxiliary compressor 2
Muffler 61 flows to the second auxiliary compressor 2.
It is understood that when, in multiple on-line system running, requiring supplementation with return line 9 fast to operating compressor
During speed oil return, the second control valve 912 can be opened to realize quick oil return.
Further, each first throttle device 621 with opening and closing function includes the first capillary 6211 He being connected in series
First control valve 6212, thus simple in construction, reliable.Specifically, the first control valve 6212 is magnetic valve.
Embodiment 2
As shown in Figure 4, the off-premises station 100 of the multiple on-line system in the present embodiment, including 7, main compressor of main muffler
4, (i.e. first auxiliary compressor the 1, second auxiliary compressor 2 and the 3rd is auxiliary for supplementary return line 9 and three auxiliary compressors
Help compressor 3) and an oil eliminator 8.
Each compressor has gas returning port 6 and exhaust outlet 5, and the gas returning port 6 of each compressor is by corresponding sub-muffler 61
It is connected with main muffler 7.
Oil eliminator 8 includes entrance 81, oil export 82 and floss hole 83, exhaust outlet 5 phase of entrance 81 and each compressor
Even, there is sub-return line 62 every individual connection between sub-muffler 61 and oil export 82.Connect on every sub-return line 62
There is the first throttle device 621 with reducing pressure by regulating flow function to reduce the temperature of the lubricating oil flowing into corresponding compressor.
The first throttle device 621 the most corresponding with the second auxiliary compressor 2 and the 3rd auxiliary compressor 3 is constructed having
Opening and closing function, the first throttle device 621 corresponding with the first auxiliary compressor 1 does not have opening and closing function.Certainly, at another
In a little embodiments, the first throttle device 621 corresponding with the first auxiliary compressor 1 be also configurable to have opening and closing function with
Reduce the bypass amount of refrigerant.Specifically, the most corresponding with the second auxiliary compressor 2 and the 3rd auxiliary compressor 3 first segment
Stream device 621 is opened when the second auxiliary compressor 2 and the 3rd auxiliary compressor 3 run.
The two ends supplementing return line 9 are connected with oil export 82 and main muffler 7 respectively, supplement and are in series with on return line 9
Having the second throttling arrangement 91 of reducing pressure by regulating flow and opening and closing function, the second throttling arrangement 91 includes the second capillary being connected in series
Pipe 911 and the second control valve 912, the second control valve 912 is magnetic valve.
Further, each first throttle device 621 with opening and closing function includes the first capillary 6211 He being connected in series
First control valve 6212, thus simple in construction, reliable.Specifically, the first control valve 6212 is magnetic valve.
Multiple on-line system according to embodiments of the present invention, including the off-premises station 100 of above-mentioned multiple on-line system.
Multiple on-line system according to embodiments of the present invention, by arranging the off-premises station 100 of above-mentioned multiple on-line system, the most multi-joint
Machine system is in low load condition (main compressor 4 works or main compressor 4 works) with part auxiliary compressor, or full negative
Lotus state (i.e. main compressor 4 and all of auxiliary compressor all works), all can evenly distribute each operating compressor
Recirculating oil quantity, it is to avoid wear and tear and the generation of causing trouble because oil return inequality causes the compressor that oil mass is few to produce, thus ensure each
The reliability service of compressor, is conducive to improving the service life of compressor, and then is conducive to improving the use longevity of multiple on-line system
Life.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (10)
1. the off-premises station of a multiple on-line system, it is characterised in that including:
Main muffler；
Multiple compressors, the plurality of compressor includes that main compressor and N number of auxiliary compressor, each described compressor have
Gas returning port and exhaust outlet, the gas returning port of each described compressor is connected with described main muffler by sub-muffler, wherein N >=2；
One oil eliminator, described oil eliminator includes entrance, oil export and floss hole, described entrance and each described compression
The exhaust outlet of machine is connected, and is connected and has sub-return line between each described sub-muffler and described oil export, and each described son returns
The first throttle device with reducing pressure by regulating flow function it is in series with, the institute that at least N-1 described auxiliary compressor is corresponding on oil pipe line
Stating first throttle device and be constructed having opening and closing function, each have the described first throttle device of opening and closing function in correspondence
Open when described auxiliary compressor runs.
The off-premises station of multiple on-line system the most according to claim 1, it is characterised in that each described auxiliary compressor pair
The described first throttle device answered is each configured to have opening and closing function.
The off-premises station of multiple on-line system the most according to claim 1, it is characterised in that the institute that described main compressor is corresponding
State first throttle device and be constructed having opening and closing function.
The off-premises station of multiple on-line system the most according to claim 1, it is characterised in that each institute with opening and closing function
State the first capillary and the first control valve that first throttle device includes being connected in series.
The off-premises station of multiple on-line system the most according to claim 4, it is characterised in that described first control valve is electromagnetism
Valve.
The off-premises station of multiple on-line system the most according to claim 1, it is characterised in that there is described in each opening and closing function
First throttle device be electric expansion valve.
7. according to the off-premises station of the multiple on-line system according to any one of claim 1-6, it is characterised in that also include supplementing
Return line, the two ends of described supplementary return line are connected with described oil export and described main muffler respectively, described supplement back
Second throttling arrangement with reducing pressure by regulating flow and opening and closing function it is in series with on oil pipe line.
The off-premises station of multiple on-line system the most according to claim 7, it is characterised in that described second throttling arrangement includes
The second capillary being connected in series and the second control valve.
The off-premises station of multiple on-line system the most according to claim 8, it is characterised in that described second control valve is electromagnetism
Valve.
10. a multiple on-line system, it is characterised in that include according to the multi-connected machine system according to any one of claim 1-9
The off-premises station of system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264887.4A CN105758066A (en) | 2016-04-25 | 2016-04-25 | Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system |
| PCT/CN2016/105406 WO2017185713A1 (en) | 2016-04-25 | 2016-11-11 | Outdoor unit for multi-online unit system, and multi-online unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264887.4A CN105758066A (en) | 2016-04-25 | 2016-04-25 | Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105758066A true CN105758066A (en) | 2016-07-13 |
Family
ID=56325869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610264887.4A Pending CN105758066A (en) | 2016-04-25 | 2016-04-25 | Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105758066A (en) |
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| CN106766365A (en) * | 2016-11-28 | 2017-05-31 | 广东美的暖通设备有限公司 | Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning |
| WO2017185713A1 (en) * | 2016-04-25 | 2017-11-02 | 广东美的暖通设备有限公司 | Outdoor unit for multi-online unit system, and multi-online unit |
| CN108224839A (en) * | 2017-12-29 | 2018-06-29 | Tcl空调器(中山)有限公司 | A kind of multi-online air-conditioning system and its control method |
| CN110207420A (en) * | 2019-06-25 | 2019-09-06 | 广东美的暖通设备有限公司 | Multi-line system and its control method |
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