CN104501467B - Oil balancing system of parallel multi-compressor unit - Google Patents
Oil balancing system of parallel multi-compressor unit Download PDFInfo
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- CN104501467B CN104501467B CN201410847964.XA CN201410847964A CN104501467B CN 104501467 B CN104501467 B CN 104501467B CN 201410847964 A CN201410847964 A CN 201410847964A CN 104501467 B CN104501467 B CN 104501467B
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- Prior art keywords
- compressor
- oil
- pipe
- bronchus
- balancing system
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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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
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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
- F25B2400/06—Several compression cycles arranged in parallel
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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
- F25B2500/00—Problems to be solved
- F25B2500/05—Cost reduction
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/18—Optimization, e.g. high integration of refrigeration components
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to the technical field of compressors and in particular relates to an oil balancing system of a parallel multi-compressor unit. The oil balancing system structurally comprises at least two compressors, namely a first compressor and a second compressor arranged in parallel, an oil balancing pipe and an air suction pipe assembly; the air suction pipe assembly comprises a first branch air pipe, a second branch air pipe and a main air suction pipe; one end of the first branch air pipe is communicated with the return air inlet of the first compressor; the second branch air pipe is communicated with the return air inlet of the second compressor; the other end of the first branch air pipe and the other end of the second branch air pipe are communicated with the main air suction pipe, respectively; a section of reducing pipeline is arranged on the pipeline of the first branch air pipe or the second air branch pipe, and the pipe diameter of the reducing pipeline is smaller than that of the pipelines on the two sides; the oil balancing pipe is provided with a section of projecting pipeline extending upwards. Compared with the prior art, the oil balancing system is capable of realizing oil balance between parallel compressors without the air balancing pipe, and has the advantages of simple structure, easy mounting, cost saving and sable and safe operation.
Description
Technical field
The present invention relates to Compressor Technology field, more particularly to a kind of oil-balancing system of Multi-compressor parallel unit.
Background technology
Multi-compressor parallel unit is employed mostly in large-scale multi-online air-conditioning system at present, not only can so be led to
The capacity of fan-out capability and indoor set that the start and stop quantity of overcompression machine preferably controls compressor is adapted to, module of being more convenient for
Metaplasia is produced and reduces equipment cost.
Lubricating oil plays very important effect within the compressor, and lubricating oil can reduce friction, take away produced by friction
Heat and abrasive dust, strengthen sealing；Lubricating oil mixes in the refrigerant, in compressor operating, the lubricating oil of very small part
Continuously it is forced out from the air vent of compressor, is entered in condenser, vaporizer by connecting line, returned again to compression
Machine.In the case where refrigeration system only has single compressor, the lubricating oil in cold-producing medium continuously can be back in compressor, from
And avoid compressor lubricant oil exhausted and burn the phenomenon of compressor；But, for Multi-compressor parallel unit, long time running
Occur that compressor chamber oil mass is uneven, or even the very few situation for causing compressor scaling loss of compressor oil mass occur, it is therefore desirable to
Solve the equalization problem of the lubricating oil between the compressor of Multi-compressor parallel unit.
In prior art, the oil-balancing system that Multi-compressor parallel unit is adopted（As shown in Figure 1）, it is in parallel including at least two
Compressor 10, suction nozzle 30 and air suction main 40, the suction nozzle 30 per compressor connected with air suction main 40, the equal oil
The gas balance pipe that the oil balance tube 4, one end that system also includes oil equalizing pipe, one end is communicated with oil tank is connected with suction nozzle 30
50, the other end of 4 gentle balance pipe 50 of oil balance tube is connected with oil equalizing pipe respectively, and flow control is provided with gas balance pipe 50
Valve processed 60.Such as Chinese patent（Publication number CN201196145）The compressor chamber for disclosing a kind of outer machine wired in parallel of multiple stage is oily
System just adopts said structure, by setting gas balance pipe and the return-air of oil balance tube common equilibrium compressor in its technical scheme
Pressure, to solve the problems, such as that the oil between compressor balances gentle balance.However, there is following defect in which：1）Oil balance tube and
Gas balance pipe is required to connect with oil equalizing pipe, causes pipeline structure complicated, it is difficult to assemble, and it is big to take up room；2）Gas is balanced
Flow control valve is set up on pipe, cost is not only increased, and flow control valve is belonged to mechanical part, for a long time using occurring
Damage, so as to cause unit normally cannot run safely.
Additionally, above-mentioned oil-balancing system is suitable only for while having the Multi-compressor parallel machine of gas balance pipe and oil balance tube
Group, but, for only this class Multi-compressor parallel unit of oil balance tube without gas balance pipe（Such as more than 7P
Paddy wheel parallel compressor unit）, when compressor is in parallel running, the back pressure for easily causing two compressors is unbalanced,
The compressor oil level for causing pressure higher is relatively low, and then the compressor for causing oil level low aerofluxuss occurs as lubricating oil is bad
Temperature is too high, ultimately results in unit and is not normally functioning.
Therefore, for the deficiencies in the prior art, urgent need to develop a kind of pipeline structure it is simple, easy to install, cost-effective,
Stable and safe in operation, and it is flat also to solve compressor chamber oil in the Multi-compressor parallel unit of not gas balance pipe well
The oil-balancing system of weighing apparatus.
The content of the invention
It is an object of the invention to avoid weak point of the prior art and provide that a kind of pipeline structure is simple, Yi An
Dress, the oil-balancing system of the Multi-compressor parallel unit of cost-effective, stable and safe in operation, the oil-balancing system can realize not having gas
Oil balance between the parallel connection compressor of balance pipe.
The purpose of the present invention is achieved through the following technical solutions：
A kind of oil-balancing system of Multi-compressor parallel unit is provided, including at least two the first compressors being arranged in parallel and
The oil storage chamber of the second compressor, the oil storage chamber of the first compressor and the second compressor is connected by oil balance tube, it is characterised in that：
Suction conduit assembly included also, the suction conduit assembly includes the first bronchus, the second bronchus and total air-breathing pipe, described first
Bronchial one end is connected with the gas returning port of first compressor, the return-air of second bronchus and second compressor
Mouth connection, the first bronchial other end and the second bronchial other end are connected with the total air-breathing pipe respectively
It is logical；
One section of reducing pipeline, the reducer pipe are provided with first bronchus or the second bronchial pipeline
Caliber of the caliber on road less than its two lateral line；
The oil balance tube is provided with one section of upwardly extending raised pipeline.
Preferably, the reducing pipeline is arranged at first bronchus or second bronchus near the return-air
One end of mouth.
Preferably, the reducing pipeline is processed using necking down process.
Preferably, the reducing pipeline is processed using indentation process.
Preferably, the two ends mouth of pipe of the reducing pipeline is socketed in first bronchus or described second respectively
Tracheal strips.
It is furthermore preferred that the two ends mouth of pipe of the reducing pipeline is sealed with first bronchus or second bronchus
Connection.
Preferably, first bronchus and second bronchus are connected with the total air-breathing pipe by tee T.
Beneficial effects of the present invention：
The oil-balancing system of the Multi-compressor parallel unit of the present invention, on the one hand hinders toward each compressor in total air-breathing pipe point
The less bronchus of power are that one section of reducing pipeline is arranged on the first bronchus or the second bronchial pipeline, make reducer pipe
Caliber of the caliber on road less than its two lateral line, so when gas passes through the reducing pipeline, as caliber diminishes suddenly, gas
Certain resistance is produced by compression, to balance the difference of pressure of inspiration(Pi) between parallel connection compressor, so as to realize parallel connection compressor
Between gas balance, realize between parallel connection compressor gas balance；On the other hand, by one section is set up on oil balance tube upwards
The raised pipeline of extension, the raised pipeline form high potential difference such that it is able to reduce parallel connection caused by the difference institute because of pressure of inspiration(Pi)
Oil level between compressor is ganged up, and makes the oil level between parallel connection compressor remain balance.Compared with prior art, the present invention
Oil-balancing system there is advantages below：
1st, the present invention is could be used that in the Multi-compressor parallel unit of not gas balance, it is only necessary to the suction nozzle group of the present invention
Part and oil balance tube can reach the effect of oil balance and gas balance；
2nd, the gentle balance pipe of the oil balance tube of prior art is required to connect with oil equalizing pipe, and its pipeline is arranged and installed very
Complexity, by comparison, The present invention reduces the complexity connected between multiple pipelines, the suction conduit assembly and oil balance of the present invention
With independently installed, its pipeline structure is simple, it is easy to install, and improves work efficiency, and it is little to take up room for Guan Junke；
3rd, the present invention need not greatly reduce production cost using the part such as flow control valve, and avoid due to
Flow control valve damage and cause unit cannot safe operation phenomenon, its job stability and security performance it is more preferable.
Description of the drawings
Using accompanying drawing, the present invention will be further described, but the content in accompanying drawing does not constitute any limitation of the invention.
Fig. 1 is the theory structure schematic diagram of the oil-balancing system of the Multi-compressor parallel unit of prior art.
Fig. 2 is the structural representation of the oil-balancing system of the Multi-compressor parallel unit of the present invention.
Fig. 3 is the structural representation of another angle of the oil-balancing system of the Multi-compressor parallel unit of the present invention.
Fig. 4 is the structural representation of the suction conduit assembly of the oil-balancing system of the Multi-compressor parallel unit of the present invention.
Fig. 5 is the structural representation of the oil balance tube of the oil-balancing system of the Multi-compressor parallel unit of the present invention.
Reference：
First compressor 1；
Second compressor 2；
Suction conduit assembly 3, the first bronchus 31, the second bronchus 32, total air-breathing pipe 33, reducing pipeline 34；
Oil balance tube 4, raised pipeline 41；
Tee T 5；
Compressor 10；
Suction nozzle 30；
Air suction main 40；
Gas balance pipe 50；
Flow control valve 60.
Specific embodiment
With the following Examples and accompanying drawing the invention will be further described.
The oil-balancing system of the Multi-compressor parallel unit of the present invention, as shown in Figures 2 to 5, sets including at least two parallel connections
The oil storage chamber of the first compressor 1 put and the second compressor 2, the oil storage chamber of the first compressor 1 and the second compressor 2 is flat by oil
Weighing apparatus pipe 4 is connected.The oil-balancing system of the present invention also includes suction conduit assembly 3, suction conduit assembly 3 include the first bronchus 31, the
Two bronchus 32 and total air-breathing pipe 33, one end of the first bronchus 31 are connected with the gas returning port of the first compressor 1, the second bronchus
32 are connected with the gas returning port of the second compressor 2, the other end of the other end of the first bronchus 31 and the second bronchus 32 respectively with
Total air-breathing pipe 33 is connected.
In the present embodiment, one section of reducing pipeline 34 on the pipeline of the first bronchus 31 or the second bronchus 32, is provided with,
Caliber of the caliber of reducing pipeline 34 less than its two lateral line.When gas pass through this section of reducing pipeline 34 when, due to caliber it is unexpected
Diminish, gas is compressed so as to produce certain resistance.
Reducing pipeline 34 is arranged at the first bronchus 31 or the second bronchus 32 near one end of gas returning port.
Before installation, first test in the first compressor 1 and the second compressor 2 which inspiratory resistance is less, then inhale always
33 points of trachea is the first bronchus 31 or the second bronchus 32 toward the less bronchus of resistance in each compressor, is passed through
Reduce the size of part caliber on the basis of original caliber and form certain resistance, to balance air-breathing between parallel connection compressor
The difference of pressure, so as to realize that the gas between parallel connection compressor is balanced.
In the present embodiment, oil balance tube 4 is provided with one section of upwardly extending raised pipeline 41, and the raised pipeline 41 forms height
Potential difference such that it is able to which the oil level reduced between the caused parallel connection compressor of difference institute because of pressure of inspiration(Pi) is ganged up, and makes compression in parallel
Oil level between machine remains balance.
Specifically, reducing pipeline 34 is by being processed using necking down process to the first bronchus 31 or the second bronchus 32
Into.
Specifically, reducing pipeline 34 can also be by adopting indentation process to the first bronchus 31 or the second bronchus 32
Process.
Except above two mode, reducing pipeline 34 in the form of sleeve pipe, can also make two end pipes of reducing pipeline 34
Mouth is socketed in the first bronchus 31 or in the second bronchus 32 respectively.
The two ends mouth of pipe of reducing pipeline 34 is tightly connected with the first bronchus 31 or the second bronchus 32.
First bronchus 31 and the second bronchus 32 are connected with total air-breathing pipe 33 by tee T 5.The present invention is not limited
In three of the above mode, as long as can realize that the reducing pipeline 34 of the present invention reduces pipe diameter size on the basis of original caliber
Purpose, its other modes for adopting belong to protection scope of the present invention.
Compared with prior art, oil-balancing system of the invention has advantages below：
1st, the present invention is could be used that in the Multi-compressor parallel unit of not gas balance, it is only necessary to the suction nozzle group of the present invention
Part 3 and oil balance tube 4 can reach the effect of oil balance and gas balance；
2nd, the 4 gentle balance pipe 50 of oil balance tube of prior art is required to connect with oil equalizing pipe（Referring to Fig. 1）, its pipeline sets
Put and install very complicated, by comparison, The present invention reduces the complexity connected between multiple pipelines, the suction nozzle of the present invention
Component 3 and oil balance tube 4 can be with independently installed, and its pipeline structure is simple, it is easy to install, and improves work efficiency, Er Qiezhan
It is little with space；
3rd, the present invention need not greatly reduce production cost using the part such as flow control valve, and avoid due to
Flow control valve damage and cause unit cannot safe operation phenomenon, its job stability and security performance it is more preferable.
Finally it should be noted that above example is merely to illustrate technical scheme rather than to present invention protection
The restriction of scope, although being explained in detail to the present invention with reference to preferred embodiment, one of ordinary skill in the art should manage
Solution, technical scheme can be modified or equivalent, without deviating from technical solution of the present invention essence and
Scope.
Claims (7)
1. the oil-balancing system of Multi-compressor parallel unit, compresses including at least two the first compressors being arranged in parallel and second
The oil storage chamber of machine, the oil storage chamber of the first compressor and the second compressor is connected by oil balance tube, it is characterised in that：Also include
Suction conduit assembly, the suction conduit assembly include the first bronchus, the second bronchus and total air-breathing pipe, and described first is bronchial
One end is connected with the gas returning port of first compressor, and second bronchus are connected with the gas returning port of second compressor,
The first bronchial other end and the second bronchial other end are connected with the total air-breathing pipe respectively；
One section of reducing pipeline is provided with first bronchus or the second bronchial pipeline, the reducing pipeline
Caliber of the caliber less than its two lateral line；
The oil balance tube is provided with one section of upwardly extending raised pipeline.
2. the oil-balancing system of Multi-compressor parallel unit according to claim 1, it is characterised in that：The reducing pipeline sets
First bronchus or second bronchus are placed near one end of the gas returning port.
3. the oil-balancing system of Multi-compressor parallel unit according to claim 1, it is characterised in that：The reducing pipeline is adopted
Processed with necking down process.
4. the oil-balancing system of Multi-compressor parallel unit according to claim 1, it is characterised in that：The reducing pipeline is adopted
Processed with indentation process.
5. the oil-balancing system of Multi-compressor parallel unit according to claim 1, it is characterised in that：The reducing pipeline
The two ends mouth of pipe is socketed in first bronchus or in second bronchus respectively.
6. the oil-balancing system of Multi-compressor parallel unit according to claim 5, it is characterised in that：The reducing pipeline
The two ends mouth of pipe is tightly connected with first bronchus or second bronchus.
7. the oil-balancing system of Multi-compressor parallel unit according to claim 1, it is characterised in that：First bronchus
It is connected with the total air-breathing pipe by tee T with second bronchus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410847964.XA CN104501467B (en) | 2014-12-31 | 2014-12-31 | Oil balancing system of parallel multi-compressor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410847964.XA CN104501467B (en) | 2014-12-31 | 2014-12-31 | Oil balancing system of parallel multi-compressor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104501467A CN104501467A (en) | 2015-04-08 |
| CN104501467B true CN104501467B (en) | 2017-04-26 |
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| CN201410847964.XA Active CN104501467B (en) | 2014-12-31 | 2014-12-31 | Oil balancing system of parallel multi-compressor unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403071A (en) * | 2016-11-28 | 2017-02-15 | 广东欧科空调制冷有限公司 | Double-compressor pipeline structure |
| CN110486965B (en) * | 2019-07-17 | 2022-06-14 | 雅凯热能技术(江苏)有限公司 | Refrigeration system based on oil circuit balance of parallel compressors and oil circuit balance method thereof |
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| CN204494911U (en) * | 2014-12-31 | 2015-07-22 | 广东欧科空调制冷有限公司 | The oil-balancing system of Multi-compressor parallel unit |
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