CN202973662U - Oil return system for centrifugal chiller - Google Patents
Oil return system for centrifugal chiller Download PDFInfo
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- CN202973662U CN202973662U CN 201220602655 CN201220602655U CN202973662U CN 202973662 U CN202973662 U CN 202973662U CN 201220602655 CN201220602655 CN 201220602655 CN 201220602655 U CN201220602655 U CN 201220602655U CN 202973662 U CN202973662 U CN 202973662U
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- pipeline
- oil return
- return system
- oil
- fuel tank
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Abstract
The utility model provides an oil return system, comprising an evaporator, a condenser, a centrifugal compressor, a high pressure air pipe, five pipelines, a first venturi spray pipe, an oil pump and a second venturi spray pipe. The centrifugal compressor comprises a blade ring component, an induction chamber positioned at the front end of the blade ring component and an oil tank, wherein one end of the high pressure air pipe is connected with the suction end of the condenser, the other end of the high pressure air pipe is connected with the jet flow end of the first venturi spray pipe; one end of the first pipeline is connected into the evaporator, and the other end of the first pipeline is connected with the leading-in end of the first venturi spray pipe; one end of the second pipeline is connected with the negative pressure end of the first venturi spray pipe, and the other end of the second pipeline is connected into the induction chamber of the compressor; one end of the third pipeline is connected with the oil tank, and the other end of the third pipeline is connected with the jet flow end of the second venturi spray pipe; the oil pump is connected to the third pipeline; one end of the fourth pipeline is connected with the induction chamber of the compressor, and the other end of the fourth pipeline is connected with the leading-in end of the second venturi spray pipe; and one end of the fifth pipeline is connected with the negative pressure end of the second venturi spray pipe, and the other end of the fifth pipeline is connected to the oil tank.
Description
Technical field
The utility model belongs to field of air conditioning, relates in particular to a kind of oil return system for centrifugal refrigerating machines.
Background technology
In the large centrifugal handpiece Water Chilling Units, centrifugal compressor is the core component of whole system, for the whole system circulation provides power.Centrifugal compressor must inject a certain amount of lubricating oil in running, the purpose of lubricating oil is mainly to lubricate, cooling, sealing, dispersive stress, prevent from getting rusty etc.All can occur oil in unit running process sneaks in cold-producing medium, can bring the impact of two aspects like this, on the one hand, reduced the heat transfer effect of heat exchanger, on the other hand, oil is constantly sneaked in cold-producing medium, oily fewer and feweri in fuel tank, might cause unit normally not move, therefore, oil return system is the device of centrifugal refrigerating machines indispensability.
In existing oil recovery system design, in general employing condenser, refrigerant driving injector carries out ejecting scavenge return, this mode ejecting scavenge return amount is large, but increased the amount that liquid refrigerant is got back to fuel tank, diluted oily concentration, and separate, purify without oil, make in refrigerant gas and can be with some oil, cause system pipeline to run oil.Another mode is, adopt compressor discharge portion (collection chamber) high-pressure oil gas as the injection source, the oily injection that accumulates in the bottom after Oil-gas Separation with the oil of evaporimeter and the compressed machine induction chamber of refrigerant mixture returns the transmission device of centrifugal compressor, owing to adopting high-pressure oil gas to cause in oil return the liquid refrigeration agent content higher as the injection source, diluted oily concentration.
The utility model content
The purpose of the utility model embodiment is to provide a kind of oil return system for centrifugal refrigerating machines, is intended to solve that amount of refrigerant in the oil return that exists in prior art is higher, the problem of the concentration of flux oil.
the utility model embodiment realizes like this, a kind of oil return system, be used for centrifugal refrigerating machines, described oil return system comprises evaporimeter, condenser and centrifugal compressor, described centrifugal compressor comprises the blade ring assembly, be positioned at induction chamber and the fuel tank of described blade ring assembly front end, described oil return system also comprises high-pressure air pipe, the first pipeline, the first venturi nozzle, the second pipeline, oil pump, the second venturi nozzle, the 3rd pipeline, the 4th pipeline and the 5th pipeline, described the first venturi nozzle has the first jet end, the first leading-in end and the first negative pressure end, described the second venturi nozzle has the second jet end, the second leading-in end and the second negative pressure end, one end of described high-pressure air pipe is connected with the suction end pipeline of described condenser, and the other end is connected with described the first jet end, one end of described the first pipeline is connected in described evaporimeter, and the other end is connected with described the first leading-in end, one end of described the second pipeline is connected in described the first negative pressure end, in the described induction chamber of other end access, one end of described the 3rd pipeline is connected with described fuel tank, and the other end is connected with described the second jet end, described oil pump is connected on described the 3rd pipeline, one end of described the 4th pipeline is connected with described induction chamber, and the other end is connected with described the second leading-in end, one end of described the 5th pipeline is connected with described the second negative pressure end, the described fuel tank of other end access.
Further, described centrifugal compressor also comprises impeller, transmission device and motor, and described fuel tank is positioned at below described transmission device, the described transmission device running of described driven by motor, and described transmission device drives described impeller operation.
Further, described oil return system also comprises the first filter, and described the first filter is arranged on described the 4th pipeline.
Further, described oil return system also comprises the second filter, and described the second filter is arranged on described the 3rd pipeline.
Further, described oil return system also comprises heater and cooler, and described heater is arranged in the fluid of described fuel tank, and described cooler is arranged on described the 3rd pipeline.
Further, described oil return system also comprises top petrol tank and the 6th pipeline that is arranged at described transmission device top, one end of described the 6th pipeline is connected with described the 3rd pipeline, described oil pump is between the junction and described fuel tank of described the 6th pipeline and described the 3rd pipeline, and the other end of described the 6th pipeline is connected to described top petrol tank.
Further, described centrifugal compressor also comprises spiral case, is provided with suction inlet on described spiral case, and described transmission device top is provided with gas-liquid separator, and described gas-liquid separator is connected to described suction inlet by refrigerant pipeline.
Suction end pipeline by condenser is introduced high pressure gas, the mixture of the oil-cold-producing medium in evaporimeter is introduced the induction chamber of compressor by the effect of the first venturi nozzle.Lubricating oil is naturally purified in the process of impact blades ring assemblies and is separated, and then accumulates in the bottom of induction chamber.Introduce hydraulic oil by oil pump, the lubricating oil that the effect by the second venturi nozzle will accumulate in the gettering container bottom draws and is back to fuel tank.The utility model mixture of the oil-cold-producing medium of flash-pot in the future passes through the hydraulic oil ejecting scavenge return case of oil pump pumping at the induction chamber of compressor after naturally purifying, realize the oil return purpose, and lubricating oil through separating-purifying, has reduced amount of refrigerant in oil return simultaneously.
Description of drawings
Fig. 1 is the structural representation of the oil return system that is used for centrifugal refrigerating machines that provides of the utility model.
Fig. 2 is the structural representation of centrifugal compressor of the oil return system of Fig. 1.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
See also Fig. 1 and Fig. 2, the oil return system that the utility model embodiment provides is used for centrifugal refrigerating machines.Described oil return system comprises evaporimeter 2, condenser 3 and centrifugal compressor 1.Described centrifugal compressor 1 comprises blade ring assembly 13, be positioned at the induction chamber 17 of described blade ring assembly 13 front ends and be used for storing the fuel tank 19 of lubricating oil.
Described oil return system also comprises high-pressure air pipe 10, the first pipeline 21, the first venturi nozzle 40, the second pipeline 22, oil pump 20, the second venturi nozzle 50, the 3rd pipeline 11, the 4th pipeline 23 and the 5th pipeline 24.Described the first venturi nozzle 40 has the first jet end 42, the first leading-in end 41 and the first negative pressure end 43.Described the second venturi nozzle 50 has the second jet end 52, the second leading-in end 51 and the second negative pressure end 53.One end of described high-pressure air pipe 10 is connected with the suction end pipeline (not shown) of described condenser 3, the other end is connected with described the first jet end 42, forms a negative pressuren zone in order to introduce gases at high pressure to described the first venturi nozzle 40 at the first negative pressure end 43 places.One end of described the first pipeline 21 is connected in described evaporimeter 2, and the other end is connected with described the first leading-in end 41; One end of described the second pipeline 22 is connected in described the first negative pressure end 43, in the described induction chamber 17 of other end access; One end of described the 3rd pipeline 11 is connected with described fuel tank 19, and the other end is connected with described the second jet end 52; Described oil pump 20 is connected on described the 3rd pipeline 11; One end of described the 4th pipeline 23 is connected with described induction chamber 17, and the other end is connected with described the second leading-in end 51; One end of described the 5th pipeline 24 is connected with described the second negative pressure end 53, the described fuel tank 19 of other end access.
Particularly, an end of described the first pipeline 21 is connected in described evaporimeter 2, in order to the mixture of oil-cold-producing medium of accessing described evaporimeter 10.
Particularly, an end of described the first pipeline 21 is connected in described evaporimeter 10 and near the liquid level position (not shown).One end of described the 4th pipeline 23 is connected with the bottom of described induction chamber 17, the lubricating oil that gathers in order to access described induction chamber 17 bottoms.Described oil pump 20 is connected on described the 3rd pipeline 11, in order to the lubricating oil in described fuel tank 19 pressurizes and are pumped in described the second venturi nozzle 50, and at negative pressuren zone of the second negative pressure end 53 formation.
The high pressure gas of drawing from the suction end pipeline (not shown) of condenser 3 enters the first venturi nozzle 40 through high-pressure air pipe 10, the first jet end 42, the first negative pressure end 43 at the first venturi nozzle 40 produces negative pressure, the mixture of the oil-cold-producing medium of the interior close liquid level position (not shown) of evaporimeter 2 is inhaled in the first venturi nozzle 40 through the first pipeline 21, the first leading-in end 41, mix with high pressure gas at the first negative pressure end 43, enter through the second pipeline 22 in the induction chamber 17 of described compressor.
High pressure gas and mix in the induction chamber 17 that synthetic hanging drop enters compressor 1 and during by blade ring assembly 13 by liquid refrigerant and oil, these drops easily collide on the sidewall of blade ring assembly 13 and induction chamber 17 these structures, lubricating oil easily sticks on the surface that it contacts, thereby lubricating oil can not be crossed the gap between the parts such as blade ring assembly 13, at last, grease accumulation glides under Action of Gravity Field together and accumulates in the bottom of induction chamber 17, has realized that oily naturally purifying separates.
Due to the bottom of grease accumulation at induction chamber 17, make it can not play useful effect in lubricating system, therefore the lubricating oil that needs to accumulate in induction chamber 17 bottoms is recovered to fuel tank 19, in the utility model, oil pump 20 is introduced the 3rd pipeline 11 with the pressurization of the oil in fuel tank 19, and then hydraulic oil enters in the second venturi nozzle 50 through the second jet end 52 of the second venturi nozzle 50, at hydraulic oil during through the second venturi nozzle 50, can produce negative pressure at the second negative pressure end 53 of the second venturi nozzle 50.The lubricating oil that induction chamber 17 bottoms are gathered is sucked through the 4th pipeline 23, the second leading-in end 51 and enters in the second venturi nozzle 50, and mix with the second negative pressure end 53 of hydraulic oil at the second venturi nozzle 50, enter in fuel tank 19 by the 5th pipeline 24, reached the purpose that lubricating oil reclaims.
Oil return system of the present utility model in the future the mixture of the oil-cold-producing medium of flash-pot 2 at the induction chamber 17 of compressor 1 after purification naturally, hydraulic oil by oil pump 20 pumpings is ejecting scavenge return case 19 continuously and automatically, realize the oil return purpose, lubricating oil through separating-purifying, has reduced amount of refrigerant in oil return simultaneously.
Described centrifugal compressor 1 also comprises impeller 14, transmission device 15 and motor 16.Described fuel tank 19 is positioned at the below of described transmission device 15.Described motor 16 drives described transmission device 15 runnings.Described transmission device 15 drives described impeller 14 runnings.
Described oil return system also comprises the first filter 70 and the second filter 71, and described the first filter 70 is arranged on described the 3rd pipeline 11, in order to the fluid in the 3rd pipeline 11 is filtered.Described the second filter 71 is arranged on described the 4th pipeline 23, in order to the fluid in the 4th pipeline 23 is filtered.
Described oil return system also comprises top petrol tank 12 and the 6th pipeline 25 that is arranged at described transmission device 15 tops.One end of described the 6th pipeline 25 is connected with described the 3rd pipeline 11, described oil pump 20 is between the junction and described fuel tank 24 of described the 6th pipeline 25 and described the 3rd pipeline 11, the other end of described the 6th pipeline 25 is connected to described top petrol tank 12, so that passing through described the 6th pipeline 25, the lubricating oil of oil pump 37 pumpings sends in top petrol tank 12, and then the needed lubricating oil of additional transmission device 15.The compressed machine 1 inner flow passage pipeline (not shown) of the fluid of top petrol tank 12 is delivered to described transmission device 15; be transmitted back to described fuel tank 19 after lubricated to described transmission device 15; not only ensure well-off lubricating oil in compressor 1 normal operation; and still can keep the lubricating oil supply under the emergency case such as shutdown suddenly, ensure the safety of compressor 1.
Particularly, the junction of described the 6th pipeline 25 and described the 3rd pipeline 11 is positioned at the outlet side of described the first filter 70.
Described centrifugal compressor 1 has suction inlet 83.Described suction inlet 83 is opened on the spiral case 18 of described compressor 1.
Described oil return system also comprises the gas-liquid separator 81 that is arranged at described transmission device 15 tops.Described gas-liquid separator 81 is connected to described suction inlet 83 by refrigerant pipeline 82.Described refrigerant pipeline 82 only illustrates in Fig. 2.
Described oil return system also comprises heater 80 and cooler 60.Described heater 80 is arranged in the fluid of described fuel tank 19.Described cooler 60 is arranged on described the 3rd pipeline 11.Described heater 80 is used for the fluid in fuel tank 19 is heated, can make the liquid refrigerant evaporation of dissolving in fluid, lowered the amount of refrigerant in fluid, thereby assurance enters the purity of the fluid of top petrol tank 12, to avoid affecting the lubricant effect of transmission device 15.Described cooler 60 is used for carrying out cooling to the fluid after heating.
The advantage of oil return system of the present utility model is:
1, first pressurize through oil pump 20 through fuel tank 19 oil out, oil pressure is stable, and oil return is also more stable, and the fluid of the induction chamber 17 bottom naturals purifications of centrifugal compressor 1 is recovered continuously and automatically.
2, after the refrigerant gas of interior heater via 80 heated volatiles of fuel tank 19 filters through gas-liquid separator 81, can be entered by refrigerant pipeline 82 suction inlet 83 of compressor 1, can form low pressure in the casing at compressor 1 transmission device 15 places, and the lubricating oil that promotes transmission device 15 places is transmitted back to fuel tank 19.
3, carry out injection without refrigerant in condenser 3, can reduce high pressure refrigerant bypass, improve system energy efficiency.
4, the refrigerant content of oil return is few, reduces the burden that fuel tank 19 inner fluids are purified and oil separates, and cold media gas band oil mass also reduces.
5, top petrol tank 12 is higher than the position at transmission device 15 places of compressor 1, not only ensure compressor 1 run well in well-off lubricating oil, and still can keep the lubricating oil supply under the emergency case such as shutdowns suddenly, the safety of guarantee compressor 1.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. oil return system, be used for centrifugal refrigerating machines, described oil return system comprises evaporimeter, condenser and centrifugal compressor, described centrifugal compressor comprises the blade ring assembly, is positioned at induction chamber and the fuel tank of described blade ring assembly front end, it is characterized in that: described oil return system also comprises high-pressure air pipe, the first pipeline, the first venturi nozzle, the second pipeline, oil pump, the second venturi nozzle, the 3rd pipeline, the 4th pipeline and the 5th pipeline, and described the first venturi nozzle has the first jet end, the first leading-in end and the first negative pressure end; Described the second venturi nozzle has the second jet end, the second leading-in end and the second negative pressure end; One end of described high-pressure air pipe is connected with the suction end pipeline of described condenser, and the other end is connected with described the first jet end; One end of described the first pipeline is connected in described evaporimeter, and the other end is connected with described the first leading-in end; One end of described the second pipeline is connected in described the first negative pressure end, in the described induction chamber of other end access; One end of described the 3rd pipeline is connected with described fuel tank, and the other end is connected with described the second jet end; Described oil pump is connected on described the 3rd pipeline; One end of described the 4th pipeline is connected with described induction chamber, and the other end is connected with described the second leading-in end; One end of described the 5th pipeline is connected with described the second negative pressure end, the described fuel tank of other end access.
2. oil return system as claimed in claim 1, it is characterized in that: described centrifugal compressor also comprises impeller, transmission device and motor, described fuel tank is positioned at below described transmission device, the described transmission device running of described driven by motor, and described transmission device drives described impeller operation.
3. oil return system as claimed in claim 2, it is characterized in that: described oil return system also comprises top petrol tank and the 6th pipeline that is arranged at described transmission device top, one end of described the 6th pipeline is connected with described the 3rd pipeline, described oil pump is between the junction and described fuel tank of described the 6th pipeline and described the 3rd pipeline, and the other end of described the 6th pipeline is connected to described top petrol tank.
4. oil return system as claimed in claim 2, it is characterized in that: described centrifugal compressor also comprises spiral case, be provided with suction inlet on described spiral case, described transmission device top is provided with gas-liquid separator, and described gas-liquid separator is connected to described suction inlet by refrigerant pipeline.
5. as the described oil return system of claim 1-4 any one, it is characterized in that: described oil return system also comprises the first filter, and described the first filter is arranged on described the 4th pipeline.
6. as the described oil return system of claim 1-4 any one, it is characterized in that: described oil return system also comprises the second filter, and described the second filter is arranged on described the 3rd pipeline.
7. as the described oil return system of claim 1-4 any one, it is characterized in that: described oil return system also comprises heater and cooler, and described heater is arranged in the fluid of described fuel tank, and described cooler is arranged on described the 3rd pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602655 CN202973662U (en) | 2012-11-14 | 2012-11-14 | Oil return system for centrifugal chiller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602655 CN202973662U (en) | 2012-11-14 | 2012-11-14 | Oil return system for centrifugal chiller |
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| Publication Number | Publication Date |
|---|---|
| CN202973662U true CN202973662U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220602655 Expired - Fee Related CN202973662U (en) | 2012-11-14 | 2012-11-14 | Oil return system for centrifugal chiller |
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| CN (1) | CN202973662U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967083A (en) * | 2012-11-14 | 2013-03-13 | 重庆美的通用制冷设备有限公司 | Oil return system for centrifugal water-chilling unit |
| CN108362024A (en) * | 2017-01-26 | 2018-08-03 | 荏原冷热系统株式会社 | Centrifugal refrierator |
| CN112013260A (en) * | 2019-05-29 | 2020-12-01 | 开利公司 | Lubricant recovery system for heat exchange system and heat exchange system |
-
2012
- 2012-11-14 CN CN 201220602655 patent/CN202973662U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967083A (en) * | 2012-11-14 | 2013-03-13 | 重庆美的通用制冷设备有限公司 | Oil return system for centrifugal water-chilling unit |
| CN108362024A (en) * | 2017-01-26 | 2018-08-03 | 荏原冷热系统株式会社 | Centrifugal refrierator |
| CN112013260A (en) * | 2019-05-29 | 2020-12-01 | 开利公司 | Lubricant recovery system for heat exchange system and heat exchange system |
| WO2020242932A1 (en) * | 2019-05-29 | 2020-12-03 | Carrier Corporation | Lubricant recovery system for heat exchange system and heat exchange system |
| US20220074633A1 (en) * | 2019-05-29 | 2022-03-10 | Carrier Corporation | Lubricant recovery system for heat exchange system and heat exchange system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20191114 |