EP1567770A1 - Schraubenverdichter - Google Patents
SchraubenverdichterInfo
- Publication number
- EP1567770A1 EP1567770A1 EP03789078A EP03789078A EP1567770A1 EP 1567770 A1 EP1567770 A1 EP 1567770A1 EP 03789078 A EP03789078 A EP 03789078A EP 03789078 A EP03789078 A EP 03789078A EP 1567770 A1 EP1567770 A1 EP 1567770A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inlet
- screw
- refrigerant
- screw compressor
- compressor according
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 claims abstract description 66
- 239000007924 injection Substances 0.000 claims abstract description 66
- 230000006835 compression Effects 0.000 claims abstract description 19
- 238000007906 compression Methods 0.000 claims abstract description 19
- 239000003507 refrigerant Substances 0.000 claims description 94
- 238000001816 cooling Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 13
- 230000010355 oscillation Effects 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 abstract 7
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 230000010349 pulsation Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 4
- 210000001520 comb Anatomy 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/12—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0007—Injection of a fluid in the working chamber for sealing, cooling and lubricating
- F04C29/0014—Injection of a fluid in the working chamber for sealing, cooling and lubricating with control systems for the injection of the fluid
Definitions
- the invention relates to a screw compressor comprising two screw rotors arranged in a compressor housing in screw rotor bores, which compress a refrigerant entering a refrigerant inlet and let it exit at a refrigerant outlet, and an inlet provided in the compressor housing for from a refrigerant injection via supplied refrigerant for additional cooling of the screw compressor. sealer, the inlet being arranged such that it opens into compression spaces enclosed by the screw rotors and the screw rotor bores.
- Screw compressors of this type are known from the prior art, in which case the inlet is provided as the inlet for the refrigerant injection, which inlet is also provided for the use of a supercooling circuit.
- the invention is therefore based on the object of providing a screw compressor in which the pressure vibrations occurring at the inlet do not propagate as far as possible or only in a damped form into the pipeline system for the refrigerant injection.
- This object is achieved according to the invention in a screw compressor of the type described in the introduction in that the inlet is preceded by a first inlet duct section running in the compressor housing, into which an injection opening for the refrigerant supplied by the refrigerant injection opens, and in that a cross-sectional area of the injection opening is opposite a cross-sectional area of the first Inlet port section is smaller by more than a factor of approximately four.
- the provision of the injection opening, through which the refrigerant is injected into the inlet duct section in the compressor housing, makes it possible to prevent the spreading of pressure fluctuations or pulsations beyond the first inlet duct section and thus to avoid noise in the pipeline system of the refrigerant injection, since this is due to the reduction of the cross section of the injection opening, an undamped propagation of pressure vibrations or pulsations beyond the first inlet duct section is avoided.
- the injection opening has a cross-sectional area which is smaller than the cross-sectional area of the first inlet duct section by more than a factor of approximately 10, better approximately 80, even better approximately 100.
- a wide variety of possibilities are conceivable with regard to the arrangement of the injection opening.
- the compressor housing such that the injection opening itself or a receptacle for the injection opening is provided directly therein, the injection opening at the entrance of the first inlet duct section being able to be located to the side of the first inlet duct section.
- a structurally particularly simple solution which is particularly suitable for converting screw compressors with an inlet channel for a conventional supercooling circuit, provides that the injection opening is provided in an insert part which is inserted into the inlet channel in a second inlet channel section of the compressor housing which adjoins the first inlet channel section is used.
- the feed channel has a larger cross-sectional area than the injection opening, so that the feed channel represents a flow resistance which is negligible compared to the injection opening.
- a control valve is arranged in the line system of the refrigerant injection in order to control the refrigerant to be injected via the injection opening.
- Such a control valve is preferably designed as a pure control valve, which in particular has no additional expansion functions and is therefore far more cost-effective than an expansion valve, in particular a controlled expansion valve.
- Such a determination of the temperature can take place in a wide variety of ways.
- the temperature of the compressor housing to be detected, for example in the region of the refrigerant outlet, by means of a sensor.
- Another possibility is to record the temperature of the compressed refrigerant after the refrigerant outlet, for example by measuring the temperature of the piping system connected to the screw compressor or the temperature of the compressed refrigerant itself.
- the line system of the refrigerant injection leads liquid refrigerant to the injection opening, so that essentially no targeted evaporation of the liquid refrigerant takes place before the injection opening.
- this object is achieved according to the invention in a screw compressor of the type described in the introduction in that an injection opening arranged in the compressor housing has a throttle point with a diameter in the range from approximately 1 mm to approximately 4 mm, even better about 3 mm.
- an expansion nozzle could also be provided before or after the injection opening.
- This solution is particularly advantageous because it means that the expansion of the refrigerant already takes place within the compressor housing, namely essentially in the first inlet duct section, and thus also that Cooling effect of the refrigerant occurs only within the compressor housing and thus as close as possible to the compression spaces in which the refrigerant is compressed in its usual way through the screw compressor, so that the additional refrigerant entering the compression spaces via the inlet then leads to optimal cooling of the in the Compressed spaces contained refrigerant leads.
- the expansion of the refrigerant in the region of the first inlet duct section also leads to efficient cooling of the regions of the compressor housing which are close to the screw rotor bores and thus also to efficient cooling of the regions of the compressor housing which are subjected to high thermal loads.
- the solution according to the invention can also be used, in particular, for screw compressors with a regulating slide, provided that the inlet is then arranged in the regulating slide so that it can be displaced with it, so that the refrigerant used in addition for cooling the screw compressor is essentially without reducing the power for Screw compressor is conveyed by the screw rotor.
- the inlet in the control slide is connected to the injection opening via a variable-length section of the first inlet channel section, so that the control slide can be adjusted in a simple manner.
- variable-length section of the first inlet duct section is designed telescopically.
- Such a telescopic realization of the inlet duct section can be achieved in particular in that the variable-length section of the first inlet duct section is formed by a connecting tube which can be inserted into a receiving duct.
- Fig. 3 shows a section enlarged section accordingly
- Fig. 4 is an enlarged fragmentary representation of a in
- Compressor housing insert insert that can be inserted from an external connection and has an injection opening.
- a first exemplary embodiment of a screw compressor according to the invention shown in FIG. 1, comprises a compressor housing, designated as a whole as 10, on which a suction connection 12 and a pressure connection 14 are provided, with refrigerant being sucked in at the suction connection 12 and compressed refrigerant being discharged at the pressure connection 14.
- the compressed refrigerant discharged at the pressure connection 14 is first fed to a condenser 16 in a cooling circuit 18 and passes from the condenser 16 as a liquid refrigerant to a branch 20, from which the cooling circuit 18 leads further to a solenoid valve 22 and to a downstream expansion valve 24, and then to an evaporator 26, from which the refrigerant evaporated in the evaporator 26 is then fed back to the suction connection.
- a refrigerant injection 30 is provided, which branches off from the cooling circuit 18 at the branch 20 and leads with a line system 32 to a control valve 34, which can be controlled by a controller 36, the controller 36 as a control variable a temperature in the range of the pressure connection 14 of the compressor housing, for example measures the temperature of the compressed refrigerant emerging from the pressure connection 14 immediately after the pressure connection 14.
- the line system 32 leads from the control valve 34 to a connection 40 provided on the compressor housing 10 for the refrigerant injection 30.
- a first exemplary embodiment of a screw compressor according to the invention comprises, as shown in FIGS. 2 and 3 in detail, screw rotor bores 48 provided in a screw rotor housing 42 of the compressor housing 10, in which intermeshing screw rotor 50 are rotatably arranged, the screw rotor bores 48 being one
- the suction-side refrigerant inlet 52 extends to a pressure-side refrigerant outlet 54 of the screw rotor housing 42 and the intermeshing screw rotors 50 suck in the refrigerant in the area of the refrigerant inlet 52, compress it in the course of the way to the refrigerant outlet 54 and discharge it as compressed refrigerant at the refrigerant outlet 54.
- a recess 56 is provided in the compressor housing 10, in which a control slide 58 can be moved in a direction 60 which runs parallel to an axis of rotation 62 of the screw rotor 50.
- the inlet opening 82 is preferably such that it opens into the first compression space 72, which is closed off by the screw combs 84 with respect to the refrigerant inlet 82.
- the inlet 80 is connected to a central receiving channel 90 which extends in the direction 60 in the control slide 58 and which has an opening 92 on one side, via which an opening 92 is held in the compressor housing 10
- the injection opening 122 serves as the actual throttle for the liquid refrigerant to be evaporated for cooling in the compressor housing 10, it is sufficient to provide in the line system 78 for switching on and off only the control valve 34 in the form of a solenoid valve controlled by the control 36 , so that an expansion valve in the line system 78 can preferably be omitted in order to allow the liquid refrigerant to expand as directly as possible at the place where it is to have its cooling effect, namely in the compressor housing 10.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10258136 | 2002-12-03 | ||
| DE10258136 | 2002-12-03 | ||
| DE10258145A DE10258145A1 (de) | 2002-12-03 | 2002-12-04 | Schraubenverdichter |
| DE10258145 | 2002-12-04 | ||
| PCT/EP2003/013224 WO2004051089A1 (de) | 2002-12-03 | 2003-11-25 | Schraubenverdichter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1567770A1 true EP1567770A1 (de) | 2005-08-31 |
| EP1567770B1 EP1567770B1 (de) | 2017-01-18 |
Family
ID=32471508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03789078.7A Expired - Lifetime EP1567770B1 (de) | 2002-12-03 | 2003-11-25 | Schraubenverdichter |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7201569B2 (de) |
| EP (1) | EP1567770B1 (de) |
| WO (1) | WO2004051089A1 (de) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7530217B2 (en) * | 2005-12-16 | 2009-05-12 | General Electric Company | Axial flow positive displacement gas generator with combustion extending into an expansion section |
| US7726115B2 (en) * | 2006-02-02 | 2010-06-01 | General Electric Company | Axial flow positive displacement worm compressor |
| US20070237642A1 (en) * | 2006-04-10 | 2007-10-11 | Murrow Kurt D | Axial flow positive displacement worm pump |
| CN100436826C (zh) * | 2007-02-07 | 2008-11-26 | 烟台冰轮股份有限公司 | 适于并联系统且具有低负荷启动功能的螺杆压缩机 |
| US8549868B2 (en) * | 2007-06-22 | 2013-10-08 | Panasonic Corporation | Refrigeration cycle apparatus |
| US8708643B2 (en) | 2007-08-14 | 2014-04-29 | General Electric Company | Counter-rotatable fan gas turbine engine with axial flow positive displacement worm gas generator |
| US7854111B2 (en) * | 2008-03-07 | 2010-12-21 | General Electric Company | Axial flow positive displacement turbine |
| US8539769B2 (en) * | 2009-10-14 | 2013-09-24 | Craig N. Hansen | Internal combustion engine and supercharger |
| US10941770B2 (en) | 2010-07-20 | 2021-03-09 | Trane International Inc. | Variable capacity screw compressor and method |
| CN102042226B (zh) * | 2011-01-05 | 2014-12-31 | 上海维尔泰克螺杆机械有限公司 | 具有柔性容积比滑阀的螺杆压缩机 |
| DE102011051730A1 (de) * | 2011-07-11 | 2013-01-17 | Bitzer Kühlmaschinenbau Gmbh | Schraubenverdichter |
| US9920763B2 (en) * | 2015-09-17 | 2018-03-20 | Ingersoll-Rand Company | Contact cooled rotary airend injection spray insert |
| CN109642579B (zh) * | 2016-08-23 | 2020-12-01 | 三菱电机株式会社 | 螺杆压缩机和制冷循环装置 |
| CN208089547U (zh) | 2017-09-30 | 2018-11-13 | 江森自控空调冷冻设备(无锡)有限公司 | 一种滑阀 |
| DE102020115442A1 (de) | 2020-06-10 | 2021-12-16 | Bitzer Kühlmaschinenbau Gmbh | Schraubenexpander und Anlage zur Gewinnung elektrischer Energie aus Wärme mit einem Schraubenexpander |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE338576B (de) * | 1968-05-06 | 1971-09-13 | Stal Refrigeration Ab | |
| DE1804884A1 (de) * | 1968-10-24 | 1970-09-17 | Gutehoffnungshuette Sterkrade | Schraubenverdichter mit zwei ineinandergreifenden Schraubenrotoren und einem axialverstellbaren Steuerschieber zur Foerdermengenregelung und OEleinspritzung |
| DE2134181A1 (de) * | 1971-03-03 | 1973-11-15 | Monsator Haushaltsgrossgeraete | Daempfer fuer verdichter, insbesondere fuer hermetische kaeltemittelverdichter |
| US3795117A (en) * | 1972-09-01 | 1974-03-05 | Dunham Bush Inc | Injection cooling of screw compressors |
| US3874828A (en) * | 1973-11-12 | 1975-04-01 | Gardner Denver Co | Rotary control valve for screw compressors |
| SE382663B (sv) * | 1974-04-11 | 1976-02-09 | Stal Refrigeration Ab | Sett att fora in mellantryckgas i en skruvkylkompressor jemte skruvkompressor for genomforande av settet. |
| US3913346A (en) * | 1974-05-30 | 1975-10-21 | Dunham Bush Inc | Liquid refrigerant injection system for hermetic electric motor driven helical screw compressor |
| JPS5930919B2 (ja) * | 1974-12-24 | 1984-07-30 | 北越工業 (株) | 液冷式回転圧縮機の液量及び気体容量調整装置 |
| GB1548663A (en) * | 1975-06-24 | 1979-07-18 | Maekawa Seisakusho Kk | Refrigerating apparatus |
| GB1555329A (en) * | 1975-08-21 | 1979-11-07 | Hall Thermotank Prod Ltd | Rotary fluid machines |
| US4220197A (en) * | 1979-01-02 | 1980-09-02 | Dunham-Bush, Inc. | High speed variable delivery helical screw compressor/expander automotive air conditioning and waste heat energy _recovery system |
| JPS57206794A (en) * | 1981-06-12 | 1982-12-18 | Hitachi Ltd | Screw compressor |
| US4545742A (en) * | 1982-09-30 | 1985-10-08 | Dunham-Bush, Inc. | Vertical axis hermetic helical screw rotary compressor with discharge gas oil mist eliminator and dual transfer tube manifold for supplying liquid refrigerant and refrigerant vapor to the compression area |
| GB8511729D0 (en) * | 1985-05-09 | 1985-06-19 | Svenska Rotor Maskiner Ab | Screw rotor compressor |
| JPS61265381A (ja) * | 1985-05-20 | 1986-11-25 | Hitachi Ltd | スクリユ−圧縮機のガス噴射装置 |
| DE3706583A1 (de) * | 1987-02-25 | 1988-09-08 | Mannesmann Ag | Verteilung der schmier- und kuehlfluessigkeit in schraubenverdichtern |
| DE19935041A1 (de) | 1999-07-26 | 2001-02-08 | Bitzer Kuehlmaschinenbau Gmbh | Schraubenverdichter |
| DE19947823A1 (de) | 1999-10-05 | 2001-04-12 | Linde Gas Ag | Expansionskühldüse |
| DE10242139A1 (de) | 2002-09-03 | 2004-03-18 | Bitzer Kühlmaschinenbau Gmbh | Schraubenverdichter |
-
2003
- 2003-11-25 WO PCT/EP2003/013224 patent/WO2004051089A1/de not_active Ceased
- 2003-11-25 EP EP03789078.7A patent/EP1567770B1/de not_active Expired - Lifetime
-
2005
- 2005-06-02 US US11/144,150 patent/US7201569B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004051089A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US7201569B2 (en) | 2007-04-10 |
| US20050226758A1 (en) | 2005-10-13 |
| EP1567770B1 (de) | 2017-01-18 |
| WO2004051089A1 (de) | 2004-06-17 |
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