CN104501467A - Oil balancing system of parallel multi-compressor unit - Google Patents
Oil balancing system of parallel multi-compressor unit Download PDFInfo
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- CN104501467A CN104501467A CN201410847964.XA CN201410847964A CN104501467A CN 104501467 A CN104501467 A CN 104501467A CN 201410847964 A CN201410847964 A CN 201410847964A CN 104501467 A CN104501467 A CN 104501467A
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- Prior art keywords
- compressor
- oil
- bronchus
- pipe
- 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
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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
- F25B2500/18—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, particularly relate to a kind of oil-balancing system of Multi-compressor parallel unit.
Background technology
Multi-compressor parallel unit is mostly have employed at present in large-scale multi-online air-conditioning system, the capacity of the fan-out capability and indoor set that so not only can better control compressor by the start and stop quantity of compressor adapts to, and modularized production of being more convenient for reduces equipment cost.
Lubricating oil plays very important effect within the compressor, and lubricating oil can reduce friction, take away heat and abrasive dust, enhanced leaktightness that friction produces; In the refrigerant, when compressor operating, the lubricating oil of a very little part is continuously forced out from the exhaust outlet of compressor, is entered in condenser, evaporimeter, then be back to compressor by connecting line in lubricating oil mixing.When refrigeration system only has single compressor, the lubricating oil in cold-producing medium is back in compressor serially, thus avoids compressor lubricant oil exhausted and burn the phenomenon of compressor; But, for Multi-compressor parallel unit, it is uneven that long time running there will be compressor chamber oil mass, even occurs the very few situation causing compressor scaling loss of compressor oil mass, therefore needs the equalization problem of the lubricating oil solved between the compressor of Multi-compressor parallel unit.
In prior art, the oil-balancing system (as shown in Figure 1) that Multi-compressor parallel unit adopts, comprise at least two compressor 10, air intake duct 30 and air suction mains 40 in parallel, the air intake duct 30 of every compressor is all communicated with air suction main 40, the gas balance pipe 50 that the oil balance tube 4 that this oil-balancing system also includes oil equalizing pipe 20, one end communicates with oil tank, one end are communicated with air intake duct 30, the other end of the gentle balance pipe 50 of oil balance tube 4 is communicated with oil equalizing pipe 20 respectively, and gas balance pipe 50 is provided with flow control valve 60.The compressor chamber oil-balancing system disclosing the outer machine wired in parallel of a kind of multiple stage as Chinese patent (publication number CN201196145) just adopts said structure, by arranging the back pressure of gas balance pipe and oil balance tube common equilibrium compressor in its technical scheme, with the oil balance solved between compressor and the problem balanced.But it exists following defect: 1) the gentle balance pipe of oil balance tube all needs to be communicated with oil equalizing pipe, cause pipeline structure complicated, be difficult to assembling, and it is large to take up room; 2) gas balance pipe sets up flow control valve, not only increase cost, and flow control valve belongs to mechanical part, long-time use there will be damage, thus causes unit normally to run safely.
In addition, above-mentioned oil-balancing system is only only applicable to the Multi-compressor parallel unit simultaneously with gas balance pipe and oil balance tube, but, for only having this class Multi-compressor parallel unit of oil balance tube and not gas balance pipe (the paddy wheel parallel compressor unit of such as more than 7P), when compressor is in parallel running, easily cause the back pressure of two compressors unbalanced, the compressor oil level causing pressure higher is lower, and then the compressor making oil level on the low side due to lubricating oil bad and occur excessive discharge temperature, finally cause unit normally not run.
Therefore, for the deficiencies in the prior art, urgent need to develop a kind of pipeline structure simple, easily install, cost-saving, stable and safe in operation, and in the Multi-compressor parallel unit of not gas balance pipe, also can solve the oil-balancing system of compressor chamber oil balance well.
Summary of the invention
The object of the invention is to avoid weak point of the prior art and provide a kind of pipeline structure simple, easily install, the oil-balancing system of the Multi-compressor parallel unit of cost-saving, stable and safe in operation, this oil-balancing system can realize the oil balance between the parallel connection compressor of not gas balance pipe.
Object of the present invention is achieved through the following technical solutions:
A kind of oil-balancing system of Multi-compressor parallel unit is provided, comprise at least two the first compressors and the second compressor be arranged in parallel, the oil storage chamber of the first compressor is communicated with by oil balance tube with the oil storage chamber of the second compressor, it is characterized in that: also include suction conduit assembly, described suction conduit assembly comprises the first bronchus, second bronchus and total air intake duct, described first bronchial one end is communicated with the gas returning port of described first compressor, described second bronchus is communicated with the gas returning port of described second compressor, the described first bronchial other end is connected with described total air intake duct respectively with the described second bronchial other end,
Described first bronchus or described second bronchial pipeline are provided with one section of reducing pipeline, and the caliber of described reducing pipeline is less than the caliber of its two lateral line;
Described oil balance tube is provided with one section of protruding pipeline upwards extended.
Preferably, described reducing pipeline is arranged at described first bronchus or described second bronchus near one end of described gas returning port.
Preferably, described reducing pipeline adopts necking down process to process.
Preferably, described reducing pipeline adopts indentation process to process.
Preferably, the two ends mouth of pipe of described reducing pipeline is socketed in described first bronchus or in described second bronchus respectively.
Preferred, the two ends mouth of pipe of described reducing pipeline and described first bronchus or described second bronchus are tightly connected.
Preferably, described first bronchus is connected with described total air intake duct by three-way pipe with described second bronchus.
beneficial effect of the present invention:
The oil-balancing system of Multi-compressor parallel unit of the present invention, divide on a bronchus i.e. the first bronchus less toward resistance in each compressor or the second bronchial pipeline at total air intake duct on the one hand and one section of reducing pipeline is set, the caliber of reducing pipeline is made to be less than the caliber of its two lateral line, like this when gas is through this reducing pipeline, because caliber diminishes suddenly, gas is produced certain resistance by compressing, to balance the difference of pressure of inspiration(Pi) between parallel connection compressor, thus the gas balance realized between parallel connection compressor, achieve gas balance between parallel connection compressor; On the other hand, by setting up one section of protruding pipeline upwards extended on oil balance tube, this protruding pipeline forms high potential difference, thus the oil level that can reduce between parallel connection compressor that the difference because of pressure of inspiration(Pi) causes is ganged up, and makes the oil level between parallel connection compressor remain balance.Compared with prior art, oil-balancing system of the present invention has the following advantages:
1, the present invention also can use at the Multi-compressor parallel unit that gas does not balance, and only needs suction conduit assembly of the present invention and oil balance tube namely can reach the effect of oil balance and gas balance;
2, the gentle balance pipe of the oil balance tube of prior art all needs to be communicated with oil equalizing pipe, its pipeline arranges and installs all very complicated, by comparison, The present invention reduces the complexity connected between multiple pipeline, suction conduit assembly of the present invention and oil balance tube all can independently be installed, and its pipeline structure is simple, are easy to install, improve operating efficiency, and it is little to take up room;
3, the present invention does not need to adopt the parts such as flow control valve, greatly reduces production cost, and avoids and to cause because flow control valve damages unit cannot the phenomenon of safe operation, its job stability and security performance better.
Accompanying drawing explanation
The present invention will be further described to utilize accompanying drawing, but the content in accompanying drawing does not form 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 Multi-compressor parallel unit of the present invention.
Fig. 3 is the structural representation of another angle of the oil-balancing system of 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 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 Multi-compressor parallel unit of the present invention.
Reference numeral:
First compressor 1;
Second compressor 2;
Suction conduit assembly 3, first bronchus 31, second bronchus 32, total air intake duct 33, reducing pipeline 34;
Oil balance tube 4, protruding pipeline 41;
Three-way pipe 5;
Compressor 10;
Oil equalizing pipe 20;
Air intake duct 30;
Air suction main 40;
Gas balance pipe 50;
Flow control valve 60.
Detailed description of the invention
With the following Examples and accompanying drawing the invention will be further described.
The oil-balancing system of Multi-compressor parallel unit of the present invention, as shown in Figures 2 to 5, the oil storage chamber comprising at least two the first compressors 1 be arranged in parallel and the second compressor 2, first compressor 1 is communicated with by oil balance tube 4 with the oil storage chamber of the second compressor 2.Oil-balancing system of the present invention also includes suction conduit assembly 3, suction conduit assembly 3 comprises the first bronchus 31, second bronchus 32 and total air intake duct 33, one end of first bronchus 31 is communicated with the gas returning port of the first compressor 1, second bronchus 32 is communicated with the gas returning port of the second compressor 2, and the other end of the first bronchus 31 is connected with total air intake duct 33 respectively with the other end of the second bronchus 32.
In the present embodiment, the pipeline of the first bronchus 31 or the second bronchus 32 is provided with one section of reducing pipeline 34, and the caliber of reducing pipeline 34 is less than the caliber of its two lateral line.When gas is through this section of reducing pipeline 34, because caliber diminishes suddenly, gas is compressed thus is produced 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 which inspiratory resistance in the first compressor 1 and the second compressor 2 less, then total air intake duct 33 points toward a less bronchus i.e. the first bronchus 31 or the second bronchus 32 of resistance in each compressor, certain resistance is formed by reducing the size of part caliber on the basis of original caliber, to balance the difference of pressure of inspiration(Pi) between parallel connection compressor, thus realize the gas balance between parallel connection compressor.
In the present embodiment, oil balance tube 4 is provided with one section of protruding pipeline 41 upwards extended, this protruding pipeline 41 forms high potential difference, thus the oil level that can reduce between parallel connection compressor that the difference because of pressure of inspiration(Pi) causes is ganged up, and makes the oil level between parallel connection compressor remain balance.
Concrete, reducing pipeline 34 is by adopting necking down process to process to the first bronchus 31 or the second bronchus 32.
Concrete, reducing pipeline 34 can also by adopting indentation process to process to the first bronchus 31 or the second bronchus 32.
Except above-mentioned two kinds of modes, reducing pipeline 34 can also adopt the form of sleeve pipe, and the two ends mouth of pipe of reducing pipeline 34 is socketed in the first bronchus 31 or in the second bronchus 32 respectively.
The two ends mouth of pipe of reducing pipeline 34 and the first bronchus 31 or the second bronchus 32 are tightly connected.
First bronchus 31 is connected with total air intake duct 33 by three-way pipe 5 with the second bronchus 32.The present invention is not limited to above three kinds of modes, as long as can realize the object that reducing pipeline 34 of the present invention reduces pipe diameter size on the basis of original caliber, its other modes adopted all belong to protection scope of the present invention.
Compared with prior art, oil-balancing system of the present invention has the following advantages:
1, the present invention also can use at the Multi-compressor parallel unit that gas does not balance, and only needs suction conduit assembly 3 of the present invention and oil balance tube 4 namely can reach the effect of oil balance and gas balance;
2, the gentle balance pipe 50 of the oil balance tube 4 of prior art all needs to be communicated with (see Fig. 1) with oil equalizing pipe 20, its pipeline arranges and installs all very complicated, by comparison, The present invention reduces the complexity connected between multiple pipeline, suction conduit assembly 3 of the present invention and oil balance tube 4 all can independently be installed, and its pipeline structure is simple, are easy to install, improve operating efficiency, and it is little to take up room;
3, the present invention does not need to adopt the parts such as flow control valve, greatly reduces production cost, and avoids and to cause because flow control valve damages unit cannot the phenomenon of safe operation, its job stability and security performance better.
Finally should be noted that; above embodiment is only for illustration of technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (7)
1. the oil-balancing system of Multi-compressor parallel unit, comprise at least two the first compressors and the second compressor be arranged in parallel, the oil storage chamber of the first compressor is communicated with by oil balance tube with the oil storage chamber of the second compressor, it is characterized in that: also include suction conduit assembly, described suction conduit assembly comprises the first bronchus, second bronchus and total air intake duct, described first bronchial one end is communicated with the gas returning port of described first compressor, described second bronchus is communicated with the gas returning port of described second compressor, the described first bronchial other end is connected with described total air intake duct respectively with the described second bronchial other end,
Described first bronchus or described second bronchial pipeline are provided with one section of reducing pipeline, and the caliber of described reducing pipeline is less than the caliber of its two lateral line;
Described oil balance tube is provided with one section of protruding pipeline upwards extended.
2. the oil-balancing system of Multi-compressor parallel unit according to claim 1, is characterized in that: described reducing pipeline is arranged at described first bronchus or described second bronchus near one end of described gas returning port.
3. the oil-balancing system of Multi-compressor parallel unit according to claim 1, is characterized in that: described reducing pipeline adopts necking down process to process.
4. the oil-balancing system of Multi-compressor parallel unit according to claim 1, is characterized in that: described reducing pipeline adopts indentation process to process.
5. the oil-balancing system of Multi-compressor parallel unit according to claim 1, is characterized in that: the two ends mouth of pipe of described reducing pipeline is socketed in described first bronchus or in described second bronchus respectively.
6. the oil-balancing system of Multi-compressor parallel unit according to claim 5, is characterized in that: the two ends mouth of pipe of described reducing pipeline and described first bronchus or described second bronchus are tightly connected.
7. the oil-balancing system of Multi-compressor parallel unit according to claim 1, is characterized in that: described first bronchus is connected with described total air intake duct by three-way pipe with described 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 |
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| Publication Number | Publication Date |
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| CN104501467A true CN104501467A (en) | 2015-04-08 |
| CN104501467B 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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Cited By (2)
| 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 |
| CN110486965A (en) * | 2019-07-17 | 2019-11-22 | 江苏宝奥兰空调设备有限公司 | The refrigeration system and its oil way balance method of oil way balance based on parallel connection compressor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2014
- 2014-12-31 CN CN201410847964.XA patent/CN104501467B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (3)
| 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 |
| CN110486965A (en) * | 2019-07-17 | 2019-11-22 | 江苏宝奥兰空调设备有限公司 | The refrigeration system and its oil way balance method of oil way balance based on parallel connection compressor |
| 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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| Publication number | Publication date |
|---|---|
| CN104501467B (en) | 2017-04-26 |
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