EP1851491B1 - Compressor system with controlled lubricant reclaim - Google Patents
Compressor system with controlled lubricant reclaim Download PDFInfo
- Publication number
- EP1851491B1 EP1851491B1 EP05723228.2A EP05723228A EP1851491B1 EP 1851491 B1 EP1851491 B1 EP 1851491B1 EP 05723228 A EP05723228 A EP 05723228A EP 1851491 B1 EP1851491 B1 EP 1851491B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricant
- mixture
- reclaim
- compressor
- reclaimed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 239000000314 lubricant Substances 0.000 title claims description 44
- 239000000203 mixture Substances 0.000 claims description 34
- 239000006200 vaporizer Substances 0.000 claims description 26
- 239000003507 refrigerant Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 9
- 230000000153 supplemental effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/047—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
-
- 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
- F25B2400/01—Heaters
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2105—Oil temperatures
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
Definitions
- the invention relates to compressor systems and, more particularly, the invention relates to a system and method for controlled recovery of lubricant for such systems.
- Compressors for example screw compressors, are commonly used in various applications including, for example, water-cooled chillers.
- a typical compressor requires oil to lubricate bearings, seals, gaps between rotors and between the rotors and adjacent stationary components such as the housing and end plates, and the like.
- the bearing load carrying capacity depends heavily upon oil viscosity. Further, the sealing characteristics of the oil are dependent upon viscosity.
- the oil to provide such sealing and lubrication is typically circulated through the system along with refrigerant. Oil entrained with the refrigerant is circulated from the compressor discharge through the system.
- a compressor system having the features of the preamble of claim 1 is disclosed in US-A-6082982 .
- a compressor system with controlled lubricant reclaim is provided as set forth in claim 1.
- a method for controlling reclaim of lubricant in a compressor system as set forth in claim 8.
- the invention relates to a system and method for controlled recovery of lubricant such as oil in a compressor system whereby resulting viscosity of the oil can be controlled and maintained.
- Figure 1 shows a system 10 in accordance with the present invention.
- This basic system is the subject of commonly owned U.S. Patent No. 6,672,102 to Huenniger et al. issued January 6, 2004 .
- system 10 includes a compressor circuit including a compressor 12, a condenser 14 and an evaporator 16 which are connected by refrigerant lines 18, 20 for flow of refrigerant through these components as desired.
- a typical system includes a further flow line from condenser 14 through an expansion device (not shown) and to evaporator 16. These components and lines complete a typical compressor circuit.
- a lubricant circuit for conveying oil from an oil sump 22 through an oil pump 24 and to an oil inlet 26 of compressor 12.
- a filter 28 can be positioned along oil line 30, if desired.
- An oil drain 32 carries oil from compressor 12 back to oil sump 22.
- oil or other suitable lubricant is mixed with refrigerant discharged through line 18 to condenser 14, the expansion device and evaporator 16. Separation and reclaim of the oil for further use within the system, while maintaining oil viscosity at desired values, is the focus of the present invention.
- the mixture within evaporator 16 is therefore metered or fed to a reclaim vaporizer 34, wherein the mixture is exposed to heat so as to separate the refrigerant from the lubricant.
- This heat boils the refrigerant off from the lubricant, and the refrigerant passes through vent lines 36 back to line 20 and to the suction inlet 38 of compressor 12.
- Due to the control of the present invention remaining oil has at this point been sufficiently purged of refrigerant as to have a viscosity suitable to maintain sealing and lubrication of the compressor as desired.
- vent line 38 is also communicated with oil sump 22 for carrying any further boiled off refrigerant from this location back to suction inlet 38 as well.
- Oil separated within reclaim vaporizer 34 passes through an oil discharge line 40 and back to sump 22 for further circulation within the lubricant circuit.
- heat is preferably applied to the refrigerant-lubricant mixture within vaporizer 34 from hot gas from the discharge of compressor 12, which can be fed to vaporizer 34, for example through line 42 which advantageously is separated off of main line 18 upstream of condenser 14.
- This hot gas from compressor 12 will be at a temperature greater than the temperature of the mixture of refrigerant and lubricant within evaporator 16.
- the gas discharge from compressor 12 can advantageously be used to provide heat to the mixture, and the resulting cooled refrigerant is then passed through line 44 to evaporator 16 and back to suction inlet 38 of compressor 12.
- the system in accordance with the present invention may further preferably include a supplemental heat source 46, which is schematically shown in the drawings, and which can be a heater device and/or a further flow of fluid from the system, either of which can be controlled to provide additional heat to vaporizer 34 as needed.
- a supplemental heat source 46 which is schematically shown in the drawings, and which can be a heater device and/or a further flow of fluid from the system, either of which can be controlled to provide additional heat to vaporizer 34 as needed.
- a control valve 48 is advantageously positioned along line 50 for carrying the mixture from evaporator 44 to reclaim vaporizer 34.
- This valve 48 is advantageously adapted to be controlled by a control unit 50 which includes sensors of the mixture temperature (T ref ), for example within evaporator 44, and the temperature of reclaimed oil (T oil ), for example within line 40 to sump 22.
- control unit 50 can advantageously be adapted to sense or otherwise determine these temperatures, and then operate control valve 48 so as to control flow rate of the mixture from evaporator 16 to reclaim vaporizer 34 and thereby control the temperature difference between T oil and T ref .
- a pre-selected range of temperature difference can be entered into control unit 50 and control unit 50 can be adapted or otherwise programmed to control valve 48 so as to maintain the temperature difference within this pre-selected range.
- Control unit 50 can be any suitable processor unit programmed with proper command instructions as set forth above. Specifically, control unit 50 is adapted to receive signals that are indicative of the temperatures T oil and T ref , and to utilize these signals to determine a proper operating position for valve 48.
- supplemental heater 46 if needed, is further advantageously controlled by control unit 50.
- control unit 50 receiving the sensed signal related to temperatures T oil and T ref , and would be programmed under situations where the difference between these temperatures is insufficient and valve 48 cannot be further closed to operate supplemental heater 46 to apply further heat as desired.
- control unit 50 has been programmed to maintain a difference ( ⁇ T) between T oil and T ref at between about a low value of X AND a high value of Y. Assume the temperature difference ⁇ T drops to a level which is less than X. At this point, control unit 50 would partially close valve 48 to slow the flow of mixture to reclaim vaporizer 34. This results in greater heating of the mixture and a higher T oil , which also leads to an increase in ⁇ T.
- control unit 50 will open valve 48 further to increase flow of mixture to reclaim vaporizer 34.
- flow rate to reclaim vaporizer 34 is optimized to maximize oil reclaim volume while maintaining the desired ⁇ T and, accordingly, a desired oil viscosity.
- valve 48 is therefore closed further by control unit 50 to attempt to raise ⁇ T to the desired value.
- Control unit 50 continues to close valve 48 until valve 48 reaches a maximum closed setting wherein a minimum flow is fed to reclaim vaporizer 34. If at this point, ⁇ T is still too low, supplemental heater 46 can be activated to provide more heat and raise ⁇ T to the desired range.
- control system which advantageously provides control of oil viscosity in reclaimed oil whereby the viscosity can be maintained at desired levels, for example to ensure good lubrication and sealing at expected operating conditions of the compressor.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Lubricants (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressor (AREA)
Description
- The invention relates to compressor systems and, more particularly, the invention relates to a system and method for controlled recovery of lubricant for such systems.
- Compressors, for example screw compressors, are commonly used in various applications including, for example, water-cooled chillers.
- A typical compressor requires oil to lubricate bearings, seals, gaps between rotors and between the rotors and adjacent stationary components such as the housing and end plates, and the like.
- The bearing load carrying capacity depends heavily upon oil viscosity. Further, the sealing characteristics of the oil are dependent upon viscosity.
- The oil to provide such sealing and lubrication is typically circulated through the system along with refrigerant. Oil entrained with the refrigerant is circulated from the compressor discharge through the system.
- Separation and recycle of this oil, while maintaining acceptable oil viscosity, is a pressing need in the industry.
- It is therefore a primary object of the present invention to provide a system and method whereby recovery of the oil and desired viscosity levels are efficiently accomplished and maintained.
- Other objects and advantages of the present invention will appear herein below.
- A compressor system having the features of the preamble of claim 1 is disclosed in
US-A-6082982 . - In accordance with the present invention, the foregoing objects and advantages have been readily attained.
- According to the invention, a compressor system with controlled lubricant reclaim is provided as set forth in claim 1.
- By controlling the rate of exposure of refrigerant- lubricant mixture to heat, control of the resulting lubricant viscosity is advantageously accomplished.
- In further accordance with the invention, a method is provided for controlling reclaim of lubricant in a compressor system as set forth in claim 8.
- A detailed description of preferred embodiments of the present invention follows, with reference to the attached drawings wherein:
-
Figure 1 schematically illustrates a system and method in accordance with the present invention. - The invention relates to a system and method for controlled recovery of lubricant such as oil in a compressor system whereby resulting viscosity of the oil can be controlled and maintained.
-
Figure 1 shows asystem 10 in accordance with the present invention. This basic system, without the additional features disclosed herein, is the subject of commonly ownedU.S. Patent No. 6,672,102 to Huenniger et al. issued January 6, 2004 . - Referring to
Figure 1 herein,system 10 includes a compressor circuit including acompressor 12, acondenser 14 and anevaporator 16 which are connected byrefrigerant lines condenser 14 through an expansion device (not shown) and toevaporator 16. These components and lines complete a typical compressor circuit. - In further accordance with the invention, a lubricant circuit is provided for conveying oil from an
oil sump 22 through anoil pump 24 and to anoil inlet 26 ofcompressor 12. Afilter 28 can be positioned alongoil line 30, if desired. Anoil drain 32 carries oil fromcompressor 12 back tooil sump 22. - As set forth above, during operation of the compressor circuit and lubricant circuit, oil or other suitable lubricant is mixed with refrigerant discharged through
line 18 to condenser 14, the expansion device andevaporator 16. Separation and reclaim of the oil for further use within the system, while maintaining oil viscosity at desired values, is the focus of the present invention. - According to the invention, the mixture within
evaporator 16 is therefore metered or fed to areclaim vaporizer 34, wherein the mixture is exposed to heat so as to separate the refrigerant from the lubricant. This heat boils the refrigerant off from the lubricant, and the refrigerant passes throughvent lines 36 back toline 20 and to thesuction inlet 38 ofcompressor 12. Due to the control of the present invention, remaining oil has at this point been sufficiently purged of refrigerant as to have a viscosity suitable to maintain sealing and lubrication of the compressor as desired. - Note that a
vent line 38 is also communicated withoil sump 22 for carrying any further boiled off refrigerant from this location back tosuction inlet 38 as well. - Oil separated within
reclaim vaporizer 34 passes through anoil discharge line 40 and back tosump 22 for further circulation within the lubricant circuit. - In accordance with the invention, heat is preferably applied to the refrigerant-lubricant mixture within
vaporizer 34 from hot gas from the discharge ofcompressor 12, which can be fed tovaporizer 34, for example throughline 42 which advantageously is separated off ofmain line 18 upstream ofcondenser 14. This hot gas fromcompressor 12 will be at a temperature greater than the temperature of the mixture of refrigerant and lubricant withinevaporator 16. Thus, the gas discharge fromcompressor 12 can advantageously be used to provide heat to the mixture, and the resulting cooled refrigerant is then passed throughline 44 toevaporator 16 and back tosuction inlet 38 ofcompressor 12. - Under certain operating conditions, sufficient heat may not be provided from the gas discharge of
compressor 12, To this end, the system in accordance with the present invention may further preferably include asupplemental heat source 46, which is schematically shown in the drawings, and which can be a heater device and/or a further flow of fluid from the system, either of which can be controlled to provide additional heat tovaporizer 34 as needed. - In accordance with the present invention, it has been found that the viscosity of lubricant circulating within the lubricant circuit can be controlled by controlling the rate of separation of refrigerant from the lubricant within
vaporizer 34. To this end, acontrol valve 48 is advantageously positioned alongline 50 for carrying the mixture fromevaporator 44 to reclaimvaporizer 34. Thisvalve 48 is advantageously adapted to be controlled by acontrol unit 50 which includes sensors of the mixture temperature (Tref), for example withinevaporator 44, and the temperature of reclaimed oil (Toil), for example withinline 40 to sump 22. - It has been found that the temperature differential between Toil and Tref is directly proportional to the resulting viscosity of this separated oil. Thus,
control unit 50 can advantageously be adapted to sense or otherwise determine these temperatures, and then operatecontrol valve 48 so as to control flow rate of the mixture fromevaporator 16 to reclaimvaporizer 34 and thereby control the temperature difference between Toil and Tref. In accordance with the present invention, a pre-selected range of temperature difference can be entered intocontrol unit 50 andcontrol unit 50 can be adapted or otherwise programmed to controlvalve 48 so as to maintain the temperature difference within this pre-selected range. - As the flow rate of mixture from
evaporator 16 is increased, the amount of refrigerant boiled off withinreclaim vaporizer 34 per flow volume will decrease, and the viscosity of resulting separated lubricant will be reduced. As the flow rate of mixture fromevaporator 16 is decreased, further separation is accomplished per flow volume by the heat applied thereto, and the resulting separated lubricant will contain less refrigerant and have a higher viscosity. -
Control unit 50 can be any suitable processor unit programmed with proper command instructions as set forth above. Specifically,control unit 50 is adapted to receive signals that are indicative of the temperatures Toil and Tref, and to utilize these signals to determine a proper operating position forvalve 48. - It should readily be appreciated that the system and method in accordance with the present invention could readily be accomplished through other approaches as well. Specifically, it is considered to be well within the scope of the present invention to control resulting viscosity of separated lubricant by instead controlling the amount of heat applied within
vaporizer 34, and/or controlling both the amount of heat and the flow rate throughvalve 48 as described above. - Also as shown in
Figure 1 ,supplemental heater 46, if needed, is further advantageously controlled bycontrol unit 50. Such control would involvecontrol unit 50 receiving the sensed signal related to temperatures Toil and Tref, and would be programmed under situations where the difference between these temperatures is insufficient andvalve 48 cannot be further closed to operatesupplemental heater 46 to apply further heat as desired. - It should readily be appreciated that while portions of the above disclosure refer to the lubricant as oil, the system of the present invention is readily applicable to systems utilizing other fluids as lubricant as well, so long as this other lubricant is to be separated from refrigerant with which it is mixed during operation of the compressor and lubricant circuits.
- It should also be appreciated that while this disclosure is made in terms of a screw compressor, the system and method of the present invention are readily applicable to any type of compressor system wherein the lubricant is mixed with refrigerant during some portion of operation, and must later be separated from same.
- Finally, although the preferred embodiment of the present invention shows heat applied to the mixture within
reclaim vaporizer 34 being supplied from hot gas discharged fromcompressor 12, the system of the present invention whereby heat exchange withinvaporizer 34 is controlled to provide desired lubricant viscosity could be accomplished utilizing other sources of heat as well, and this is well within the broad scope of the present invention. - An illustrative example of operation of the invention is provided herein. Assume a system as shown in
Figure 1 is operating withvalve 48 fully open. Mixture fromevaporator 16 to reclaimvaporizer 34 is at a maximum flow rate. At this operation,control unit 50 has been programmed to maintain a difference (ΔT) between Toil and Tref at between about a low value of X AND a high value of Y. Assume the temperature difference ΔT drops to a level which is less than X. At this point,control unit 50 would partially closevalve 48 to slow the flow of mixture to reclaimvaporizer 34. This results in greater heating of the mixture and a higher Toil, which also leads to an increase in ΔT. - Assume that ΔT now exceeds the value Y. At this point,
control unit 50 will openvalve 48 further to increase flow of mixture to reclaimvaporizer 34. In this way, flow rate to reclaimvaporizer 34 is optimized to maximize oil reclaim volume while maintaining the desired ΔT and, accordingly, a desired oil viscosity. - Assume next that after the first partial closing of
valve 48, the ΔT value remains less than X.Valve 48 is therefore closed further bycontrol unit 50 to attempt to raise ΔT to the desired value.Control unit 50 continues to closevalve 48 untilvalve 48 reaches a maximum closed setting wherein a minimum flow is fed to reclaimvaporizer 34. If at this point, ΔT is still too low,supplemental heater 46 can be activated to provide more heat and raise ΔT to the desired range. - It should be appreciated that a control system has been provided according to the invention which advantageously provides control of oil viscosity in reclaimed oil whereby the viscosity can be maintained at desired levels, for example to ensure good lubrication and sealing at expected operating conditions of the compressor.
- It is to be understood that the invention is not limited to the illustrations described and shown herein, which are deemed to be merely illustrative of the best modes of carrying out the invention, and which are susceptible of modification of form, size, arrangement of parts and details of operation.
Claims (9)
- A compressor system (10) with controlled lubricant reclaim, comprising:a compressor circuit comprising a compressor (12), a condenser (14), and an evaporator (16) connected by refrigerant flow line;a lubricant circuit for circulating lubricant to the compressor (12);a reclaim vaporizer (34) adapted to heat a refrigerant-lubricant mixture from the evaporator (16) whereby the mixture is heated and lubricant and refrigerant are separated to provide reclaimed lubricant to the lubricant circuit and reclaimed refrigerant to the compressor circuit; anda control unit (50); characterised in that:said control unit is adapted to control flow of the mixture from the evaporator (16) to the reclaim vaporizer (34) based upon temperature (Tref) of the mixture from the evaporator (16) and temperature (Toil) of reclaimed lubricant leaving the reclaim vaporiser (34).
- The system of claim 1, wherein the control unit (50) comprises a valve (48) positioned along a discharge line (50) for conveying the mixture from the evaporator (16) to the reclaim vaporizer (34).
- The system of claim 2, wherein the control unit is adapted to operate the valve (48) to control flow rate of the mixture to the reclaim vaporiser (34) so as to maintain a temperature difference between the reclaimed lubricant and the mixture within a preselected range.
- The system of claim 1, wherein the control unit is adapted to control flow rate of the mixture to the reclaim vaporiser (34) so as to maintain a temperature difference between the reclaimed lubricant and the mixture within a preselected range.
- The system of any preceding claim, wherein the reclaim vaporizer (34) is communicated with discharge gas from the compressor (12) to heat the mixture.
- The system of claim 5, further comprising a supplemental heater (46) for providing additional heat to the mixture in the reclaim vaporizer (34).
- The system of any preceding claim, wherein the compressor (12) is a screw compressor.
- A method for controlling reclaim of lubricant in a compressor system (10) according to claim 1, comprising the steps of:operating the compressor circuit so as to provide a refrigerant-lubricant mixture leaving the evaporator (16);exposing the mixture to heat in the reclaim vaporizer (34) so as to provide reclaimed lubricant to the lubricant circuit and reclaimed refrigerant to the compressor circuit; characterized bycontrolling flow rate of the mixture to the reclaim vaporizer (34) based upon temperature (Tref) of the mixture leaving the evaporator and temperature (Toil) of the reclaimed lubricant leaving the reclaim vaporizer.
- The method of claim 8, wherein the controlling step comprises sensing the temperature of the mixture and the reclaimed lubricant, and controlling flow of the mixture to the reclaim vaporizer to maintain a temperature difference between reclaimed lubricant temperature and mixture temperature within a preselected range.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2005/005092 WO2006088459A2 (en) | 2005-02-15 | 2005-02-15 | Compressor system with controlled lubricant reclaim |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1851491A2 EP1851491A2 (en) | 2007-11-07 |
EP1851491A4 EP1851491A4 (en) | 2010-09-01 |
EP1851491B1 true EP1851491B1 (en) | 2014-04-02 |
Family
ID=36916868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05723228.2A Not-in-force EP1851491B1 (en) | 2005-02-15 | 2005-02-15 | Compressor system with controlled lubricant reclaim |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080271477A1 (en) |
EP (1) | EP1851491B1 (en) |
CN (1) | CN100538216C (en) |
AU (1) | AU2005327580B2 (en) |
HK (1) | HK1120599A1 (en) |
WO (1) | WO2006088459A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11435122B2 (en) | 2019-05-29 | 2022-09-06 | Carrier Corporation | Refrigeration apparatus |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008112566A2 (en) * | 2007-03-09 | 2008-09-18 | Johnson Controls Technology Company | Refrigeration system |
CN102460040B (en) * | 2009-05-11 | 2014-04-23 | Lg电子株式会社 | Air conditioner |
US8623119B2 (en) * | 2009-10-15 | 2014-01-07 | Daryl W. Hanson | Compressor lubricant reclaiming process and system |
CN103047170B (en) * | 2011-10-17 | 2015-06-03 | 珠海格力电器股份有限公司 | Compressor oil supply system and compressor with same |
CN104956164B (en) | 2013-01-25 | 2017-05-17 | 特灵国际有限公司 | Refrigerant cooling and lubrication system with refrigereant source access from an evaporator |
TWI577949B (en) | 2013-02-21 | 2017-04-11 | 強生控制科技公司 | Lubrication and cooling system |
WO2014204745A1 (en) * | 2013-06-17 | 2014-12-24 | Carrier Corporation | Oil recovery for refrigeration system |
WO2015069373A1 (en) * | 2013-11-08 | 2015-05-14 | Carrier Corporation | Fluid collection assembly |
CN104776028B (en) * | 2014-01-10 | 2017-08-29 | 阿特拉斯·科普柯空气动力股份有限公司 | The method and the compressor of application this method condensed in the oil of anti-spraying oil formula compressor |
WO2015142825A1 (en) * | 2014-03-18 | 2015-09-24 | Carrier Corporation | Refrigerant lube system |
CN104180142B (en) * | 2014-08-22 | 2017-02-01 | 珠海格力电器股份有限公司 | Lubricating oil supply device, centrifugal compressor and lubricating oil supply method |
JP6397372B2 (en) * | 2015-06-12 | 2018-09-26 | 荏原冷熱システム株式会社 | Compression refrigerator |
EP3362747B1 (en) * | 2015-10-15 | 2024-01-03 | Carrier Corporation | Multi-stage oil batch boiling system |
US10935292B2 (en) | 2018-06-14 | 2021-03-02 | Trane International Inc. | Lubricant quality management for a compressor |
US11982475B2 (en) | 2019-05-07 | 2024-05-14 | Carrier Corporation | Refrigerant lubrication system with side channel pump |
US20210318042A1 (en) * | 2020-04-08 | 2021-10-14 | Carrier Corporation | Vapor compression system and method for vapor oil recovery |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4878355A (en) * | 1989-02-27 | 1989-11-07 | Honeywell Inc. | Method and apparatus for improving cooling of a compressor element in an air conditioning system |
US5016447A (en) * | 1990-05-02 | 1991-05-21 | Carrier Corporation | Oil return for a two-stage compressor having interstage cooling |
US6082982A (en) * | 1997-11-17 | 2000-07-04 | Uop Llc | Flooded compressor with improved oil reclamation |
US6672102B1 (en) * | 2002-11-27 | 2004-01-06 | Carrier Corporation | Oil recovery and lubrication system for screw compressor refrigeration machine |
-
2005
- 2005-02-15 AU AU2005327580A patent/AU2005327580B2/en not_active Ceased
- 2005-02-15 CN CNB2005800483985A patent/CN100538216C/en not_active Expired - Fee Related
- 2005-02-15 US US11/816,190 patent/US20080271477A1/en not_active Abandoned
- 2005-02-15 EP EP05723228.2A patent/EP1851491B1/en not_active Not-in-force
- 2005-02-15 WO PCT/US2005/005092 patent/WO2006088459A2/en active Application Filing
-
2008
- 2008-11-06 HK HK08112194.1A patent/HK1120599A1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11435122B2 (en) | 2019-05-29 | 2022-09-06 | Carrier Corporation | Refrigeration apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN100538216C (en) | 2009-09-09 |
AU2005327580A1 (en) | 2006-08-24 |
WO2006088459A3 (en) | 2008-01-03 |
CN101180507A (en) | 2008-05-14 |
EP1851491A4 (en) | 2010-09-01 |
AU2005327580B2 (en) | 2010-10-21 |
HK1120599A1 (en) | 2009-04-03 |
EP1851491A2 (en) | 2007-11-07 |
US20080271477A1 (en) | 2008-11-06 |
WO2006088459A2 (en) | 2006-08-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1851491B1 (en) | Compressor system with controlled lubricant reclaim | |
US20210396436A1 (en) | Lubricant management for an hvacr system | |
EP1075631B1 (en) | Electronic controlled expansion valve | |
US5224354A (en) | Control system for refrigerating apparatus | |
CA2212804C (en) | Feed forward control of expansion valve | |
US6681582B2 (en) | Vapor compression type refrigeration apparatus including leak detection and method for detecting refrigerant leaks | |
AU2007241898B2 (en) | Refrigeration system | |
KR850008211A (en) | Control system and method for limiting coolant of refrigerating unit at recirculation start | |
EP3317592B1 (en) | Heat recovery system with liquid separator application and a method of fluid flow through a fluid circuit during both a cooling and a heat recovery mode | |
US6266964B1 (en) | Use of electronic expansion valve to maintain minimum oil flow | |
EP1620685B1 (en) | Vapor compression system | |
JPH0379959A (en) | Refrigeration apparatus | |
JP2001033112A (en) | Method for operating refrigerating cycle, and refrigerator | |
US5062571A (en) | Temperature sensing control for refrigeration system | |
US11079150B2 (en) | Method for controlling level of liquid within an evaporator and a system thereof | |
CN100359274C (en) | Constant temp. liquid circulating device | |
JP2526318Y2 (en) | Refrigeration / cooling equipment | |
JPH08210720A (en) | Air conditioner with refrigeratnt heater | |
JPH07190507A (en) | Heat pump | |
JPH05322330A (en) | Freezer device | |
CN113720058B (en) | Oil return control device and method of air conditioning system and air conditioning system | |
EP4063763B1 (en) | Method for managing a heat pump operating with a low environmental impact operating fluid | |
JP2008309480A (en) | Refrigerating unit | |
JP2501947B2 (en) | Refrigeration equipment | |
JPH0359351A (en) | Air conditioner |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20070903 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR LV MK YU |
|
R17D | Deferred search report published (corrected) |
Effective date: 20080103 |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20100729 |
|
17Q | First examination report despatched |
Effective date: 20101230 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R079 Ref document number: 602005043162 Country of ref document: DE Free format text: PREVIOUS MAIN CLASS: F25B0043020000 Ipc: F25B0031000000 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F25B 31/00 20060101AFI20130326BHEP |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20130515 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20131114 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 660370 Country of ref document: AT Kind code of ref document: T Effective date: 20140415 Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602005043162 Country of ref document: DE Effective date: 20140508 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 660370 Country of ref document: AT Kind code of ref document: T Effective date: 20140402 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: VDEP Effective date: 20140402 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140702 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140703 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140802 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140804 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602005043162 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20150106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602005043162 Country of ref document: DE Effective date: 20150106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150215 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20150215 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150228 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150228 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150215 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150215 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 13 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20050215 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 602005043162 Country of ref document: DE Representative=s name: SCHMITT-NILSON SCHRAUD WAIBEL WOHLFROM PATENTA, DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140402 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20220119 Year of fee payment: 18 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20220120 Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602005043162 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230228 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230901 |