CN201964686U - Oil level balance device for multi-compressor centrifugal air conditioner set - Google Patents
Oil level balance device for multi-compressor centrifugal air conditioner set Download PDFInfo
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- CN201964686U CN201964686U CN2010206667302U CN201020666730U CN201964686U CN 201964686 U CN201964686 U CN 201964686U CN 2010206667302 U CN2010206667302 U CN 2010206667302U CN 201020666730 U CN201020666730 U CN 201020666730U CN 201964686 U CN201964686 U CN 201964686U
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Abstract
The utility model relates to an oil level balance device for a multi-compressor centrifugal air conditioner set, which is characterized in that the air conditioner set comprises two or more than two centrifugal compressors, all compressors are distributed at the same height, an air pressure balance pipe and an oil level balance pipe are connected between the adjacent compressors for realizing oil level balance, in addition, injection oil return devices with the same specifications are arranged under oil tanks of all compressors, and refrigerant recovering pipes with the same specifications are arranged above the oil tanks, are connected onto refrigerant gathering pipes and are finally connected into an evaporator through the refrigerant gathering pipes. The oil level balance device has the advantages that the structure is simple, the implementation is easy, the performance is reliable and stable, the addition of special electric control assemblies is not needed, in addition, the problem of the air pressure balance between the oil tanks arranged inside each compressor can be perfectly solved no matter whether the air conditioner set adopts a compressor serial connection mode or a compressor parallel connection mode, and further, the oil level balance of all compressors is realized.
Description
Technical field
The utility model relates to a kind of oil level bascule of multi-compressor air-conditioning unit, relates in particular to the oil level bascule of the centrifugal air-conditioning unit of a kind of multi-compressor.
Background technology
Along with the implementation of current energy-saving and emission-reduction policy, central cooling, heating reduce the waste of the energy owing to can effectively improve rate of energy, are approved by society that more and more the market demand of corresponding large-scale refrigeration, cooling/heating air conditioner product is also in continuous lifting.Wherein centrifugal central air-conditioning since moving component few, fault rate is low, reliability is high and energy-saving effect is obvious, in this field in occupation of the very big market share.The Engineering Projects of but current especially big refrigerating capacity, high-temperature heat supply and complex working condition is more and more, the design of single compressor often seems very weak this moment, and most in fact in these cases air-conditionings is made the commercial city and selected to use a plurality of compressors as solution.But no matter compressor is parallel connection or series connection in the centrifugal air-conditioning unit of multi-compressor, because the complexity of centrifugal compressor internal lubrication oil system, the assurance of its lubricating system is a difficult problem always.
In the practical application at present, when centrifugal compressor is in parallel, often adopt many circulatory systems to realize, be that each compressor all has a cover one's own and independent of each other refrigerant system and lubricating oil system fully, though do the assignment problem that has solved unit internal lubrication oil like this, but the reduction of heat exchanger utilization rate in the time of but can causing the increase of unit cost and sub-load, and for the parallel centrifugal air-conditioning unit of the centrifugal air-conditioning unit of tandem and the single circulatory system, the oil level balance of each compressor chamber is unusual difficulty then, in order to realize the oil level balance between a plurality of compressors, have to adopt a plurality of fuel level sensors and magnetic valve to come the oil level of single compressor inside is unified regulation and control under a lot of situations.Though do the oil level balance that can realize each compressor like this, increased the complexity and the unreliability of unit also.
Therefore adopting the oil level equilibrium problem which kind of measure can the centrifugal air-conditioning unit of simple and effective solution multi-compressor, is one of difficult problem of facing of current person skilled in art.
The utility model content
Technique effect of the present utility model can overcome above-mentioned defective, and the oil level bascule of the centrifugal air-conditioning unit of a kind of multi-compressor is provided, and it can solve the air pressure balance problem between each compressor inside tank, and then realizes the oil level balance of all compressors.
For achieving the above object, the utility model adopts following technical scheme: comprise the centrifugal compressor more than two or two in its air-conditioning unit, all compressors are distributed on the identical height, need be connected with a barometric pipe and an oil level balance pipe between the adjacent compressor of realization oil level balance, and the oil groove of all compressors below is provided with the injection oil return apparatus of same size, the oil groove top is provided with the cryogen recovery tube of same size, all cryogen recovery tubes are connected on the cryogen convergence tube, finally insert evaporimeter by the cryogen convergence tube.
Centrifugal air-conditioning unit is in the process of operation, because the design feature of itself, the inevasible parts of lubricating oil that has continues to sneak into slowly in the refrigerant system, in order to guarantee unit under the situation of long-time running, the lubricating oil total amount of compressor inside can maintain a metastable level.This part lubricating oil must be reclaimed, most units all adopt the injection oil return apparatus that the lubricating oil that is blended into refrigerant system is recovered to compressor oil groove inside, but the lubricating oil that is recovered to oil groove is not pure lubricating oil, wherein mixing a certain amount of cold-producing medium, in order to guarantee the operate as normal of centrifugal unit, must be again the refrigerant-recovery of this part to the refrigerant cycle system, common way is to offer the refrigerant gas recovery holes of same size at the top of the oil groove of compressor, be connected to the air entry of each compressor by special separately pipeline, finish the recovery of refrigerant gas.And in the utility model, all compressors are placed on the same level height, originally the cryogen recovery tube that separates integrated earlier gather, the unified afterwards evaporimeter that is connected to unit, guarantee the uniformity of the recovery end air pressure of unnecessary refrigerant gas, the position of 2 times of height of oil groove standard level height is provided with barometric pipe in the middle part of each compressor, and the caliber of this pipe is 1.5 times of cryogen reclaim line, its objective is the compressor air pressure bypass area that guarantees q.s.The position of 0.75 times of height of oil groove standard level height is provided with the oil level balance pipe bottom compressor, the diameter of oil level balance pipe is identical with the diameter of cryogen recovery tube, its objective is the oil level balance that realizes between adjacent two oil grooves, and reduce the fluctuation of oil level under the emergency case.By above three circuits, can realize the oil level balance of each compressor inside.
Cryogen recovery tube and oil groove junction are provided with gs-oil separator.
The utility model is simple for structure, dependable performance is stable, need not to add special electrically-controlled component, and no matter unit adopts the form of compressor series connection still is the form of compressor parallel, can both well solve the air pressure balance problem between each compressor inside tank, and then realize the oil level balance of all compressors.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in detail:
Fig. 1 is the system schematic of tandem double-compressor air-conditioning unit;
Fig. 2 is the utility model air-conditioning unit oil level bascule schematic diagram.
Among the figure: 1. cryogen recovery tube; 2. oil groove; 3. barometric pipe; 4. oil level balance pipe; 5. gs-oil separator; 6. cryogen convergence tube; 7. injection oil return apparatus; 8. lubricating oil intake line; 9. lubricating oil output pipe; 10. evaporimeter; 11. compressor.
The specific embodiment
Comprise the centrifugal compressor 11 more than two or two in the air-conditioning unit of the present utility model, all compressors 11 are distributed on the identical height, need be connected with a barometric pipe 3 and an oil level balance pipe 4 between the adjacent compressor 11 of realization oil level balance, and oil groove 12 belows of all compressors are provided with the injection oil return apparatus 7 of same size, oil groove 12 tops are provided with the cryogen recovery tube 1 of same size, all cryogen recovery tubes 1 are connected on the cryogen convergence tube 6, finally insert evaporimeter 10 by cryogen convergence tube 6.
Cryogen recovery tube 1 is provided with gs-oil separator 5 with oil groove 12 junctions.The diameter of barometric pipe 3 is 1.5 times of cryogen recovery tube 1 diameter, offers highly 2 times for normal oil level height in the oil groove 12.The diameter of oil level balance pipe 4 is identical with the diameter of cryogen recovery tube 1, offers highly 0.75 times for normal oil level height in the oil groove 12.
As shown in Figure 1, only indicated the main body pipeline of air-conditioning system, and some secondary structures have been omitted, as can be seen from the figure, for the oil groove 2 of compressor, the oil circuit piping of being made up of lubricating oil output pipe 9 and lubricating oil intake line 8 does not influence for oil groove 2 pressure inside, and what reality determined oil groove pressure is the cryogen admission velocity of injection oil return apparatus 7 and the cryogen velocity of discharge of cryogen reclaim line 1.And the distribution of lubrication oil of 11 on two compressors; because the oil return performance of injection oil return apparatus 7 is subjected to the influence of several factors; so be difficult to guarantee to escape into lubricating oil in the refrigerant system can mean allocation to two compressor 11 when reclaiming in the middle of; if there is not the oil level bascule; unit is easy to occur a compressor lubricant oil too much and the too low situation of another compressor oil level finally can cause compressor to shut down even damage because of oil starvation when long-time running.
As shown in Figure 2, the nominal diameter of the cryogen recovery tube 1 of two compressors is identical, if this diameter value is D, then this uses the specification of other pipelines of selecting for use in novel as follows: the diameter value of cryogen recovery tube convergence tube 6 is 2*D, the diameter value of barometric pipe 3 is 1.5*D, the diameter value D of oil level balance pipe 4.
During the unit actual motion, the lubricating oil that injection oil return apparatus 7 constantly will be mixed with cold-producing medium is ejected into oil groove 2 inside.Cryogen evaporates in oil groove 2 and produces a large amount of bubbles, and adding the gear that rotates at a high speed in the oil groove has very strong perturbation action for air-flow, so the gas of lubricating oil top is not simple refrigerant gas, wherein is mixed with a large amount of mist of oils.When reclaiming refrigerant gas, take away mist lubrication oil for fear of cryogen recovery tube 1, added a gs-oil separator 5 at mouth of pipe place.Refrigerant gas after the filtration is mixed in cryogen convergence tube 6 by after the cryogen recovery tube separately, feeds evaporimeter 10 afterwards.Because enough circulation areas and identical cut-in pressure are arranged, adopt this structure, even without barometric pipe, in the set steady operation, the oil groove 2 pressure inside values of two compressors also are essentially identical.But only so still not enough because switching on and shutting down, two compressor 11 loads have a long way to go or unit load fluctuation in, still may have certain pressure reduction between two compressors 11.For the force value of oil groove 2 sides that can further guarantee two compressors is identical always, added a barometric pipe 3 again in the middle and upper part of two oil grooves, because the diameter value of this root pipe is 1.5 times of cryogen recovery tube 1, and any obstruct is not established in the centre.Even two oil grooves have produced pressure difference value and also can have been balanced out by barometric pipe 3 rapidly in the work like this.So this can guarantee the oil groove of two compressors essentially identical state that all keep-ups pressure under any operating mode.And the balance of final oil level is to realize by the oil balance tube 4 that is opened in two compressor oil groove 2 bottom sides.Its height value of offering is 0.75 times of normal oil level height; this makes it can guarantee the oil level balance of two compressions under the identical situation of both sides oil groove pressure; again can be under emergency case (pressure such as a compressor oil groove raises a lot suddenly); guarantee to keep in the on high-tension side compressor oil groove lubricating oil of at least 0.75 times of normal oil mass; required with the normal operation of keeping unit, thus avoid compressor to shut down or damage because of the transience oil starvation.And then realized the purpose of the oil level balance of the centrifugal air-conditioning unit of multi-compressor.
This utility model includes but not limited to the situation of double-compressor series connection, and is suitable equally for the situation of multi-compressor series connection and multi-compressor parallel connection.
Claims (4)
1. the oil level bascule of the centrifugal air-conditioning unit of multi-compressor, it is characterized in that, comprise the centrifugal compressor (11) more than two or two in the air-conditioning unit, all compressors (11) are distributed on the identical height, need be connected with a barometric pipe (3) and an oil level balance pipe (4) between the adjacent compressor (11) of realization oil level balance, and the oil groove of all compressors (12) below is provided with the injection oil return apparatus (7) of same size, oil groove (12) top is provided with the cryogen recovery tube (1) of same size, all cryogen recovery tubes (1) are connected on the cryogen convergence tube (6), finally insert evaporimeter (10) by cryogen convergence tube (6).
2. the oil level bascule of the centrifugal air-conditioning unit of multi-compressor according to claim 1 is characterized in that, cryogen recovery tube (1) is provided with gs-oil separator (5) with oil groove (12) junction.
3. the oil level bascule of the centrifugal air-conditioning unit of multi-compressor according to claim 1 is characterized in that, the diameter of barometric pipe (3) is 1.5 times of cryogen recovery tube (1) diameter.
4. the oil level bascule of the centrifugal air-conditioning unit of multi-compressor according to claim 1 is characterized in that, the diameter of oil level balance pipe (4) is identical with the diameter of cryogen recovery tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206667302U CN201964686U (en) | 2010-12-17 | 2010-12-17 | Oil level balance device for multi-compressor centrifugal air conditioner set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206667302U CN201964686U (en) | 2010-12-17 | 2010-12-17 | Oil level balance device for multi-compressor centrifugal air conditioner set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201964686U true CN201964686U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206667302U Expired - Lifetime CN201964686U (en) | 2010-12-17 | 2010-12-17 | Oil level balance device for multi-compressor centrifugal air conditioner set |
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| CN (1) | CN201964686U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363724A (en) * | 2012-04-10 | 2013-10-23 | 丹佛斯（天津）有限公司 | Oil balance device for oil balance between compressors |
| CN104457030A (en) * | 2013-09-13 | 2015-03-25 | 约克广州空调冷冻设备有限公司 | Oil way system for parallel-connection type air conditioning unit and parallel-connection type air conditioning unit |
| CN106824032A (en) * | 2017-03-17 | 2017-06-13 | 瑞金市瑞谷科技发展有限公司 | A kind of conduction oil temperature control system |
| CN107339826A (en) * | 2017-07-04 | 2017-11-10 | 重庆美的通用制冷设备有限公司 | Compressor assembly and there is its refrigeration system |
-
2010
- 2010-12-17 CN CN2010206667302U patent/CN201964686U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363724A (en) * | 2012-04-10 | 2013-10-23 | 丹佛斯（天津）有限公司 | Oil balance device for oil balance between compressors |
| CN103363724B (en) * | 2012-04-10 | 2016-01-13 | 丹佛斯（天津）有限公司 | For the oil balancing unit of compressor chamber oil balance |
| CN104457030A (en) * | 2013-09-13 | 2015-03-25 | 约克广州空调冷冻设备有限公司 | Oil way system for parallel-connection type air conditioning unit and parallel-connection type air conditioning unit |
| CN104457030B (en) * | 2013-09-13 | 2017-08-25 | 约克广州空调冷冻设备有限公司 | Oil piping system and parallel type air-conditioner unit for parallel type air-conditioner unit |
| CN106824032A (en) * | 2017-03-17 | 2017-06-13 | 瑞金市瑞谷科技发展有限公司 | A kind of conduction oil temperature control system |
| CN107339826A (en) * | 2017-07-04 | 2017-11-10 | 重庆美的通用制冷设备有限公司 | Compressor assembly and there is its refrigeration system |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20110907 |
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| CX01 | Expiry of patent term |