EP0593495B1 - Dispositif frigorifique - Google Patents
Dispositif frigorifique Download PDFInfo
- Publication number
- EP0593495B1 EP0593495B1 EP92909704A EP92909704A EP0593495B1 EP 0593495 B1 EP0593495 B1 EP 0593495B1 EP 92909704 A EP92909704 A EP 92909704A EP 92909704 A EP92909704 A EP 92909704A EP 0593495 B1 EP0593495 B1 EP 0593495B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- oil
- coolant
- refrigerant
- bearings
- 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.)
- Expired - Lifetime
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 21
- 239000002826 coolant Substances 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 abstract description 43
- 238000005057 refrigeration Methods 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 description 10
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000002023 somite Anatomy 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
Definitions
- the invention relates to a cooling device according to the preamble of patent claim 1.
- Refrigeration and air conditioning systems essentially comprise an evaporator in which heat is extracted from the environment by vaporizing the refrigerant, a compressor which increases the pressure of the evaporated refrigerant from a suction pressure to an outlet pressure, and a condenser in which that is under the outlet pressure evaporated refrigerant is liquefied with the release of heat.
- the oil injected into the compressor is cooled depending on an end temperature resulting at the pressure outlet of the compressor. Cooling can be done by refrigerant injection, or by cooling with water or air in a heat exchanger, e.g. a plate heat exchanger. In the latter case, a large amount of oil injection requires large and expensive heat exchangers.
- the temperature of the injected oil is essentially determined by the fact that its viscosity is high enough to ensure lubrication of the bearing points. If the oil temperature rises, the viscosity of the oil drops and the lubrication of the bearing points of the rotors is at risk. However, lower oil viscosities or higher oil temperatures would also be permissible for the above-mentioned seal of the column, which requires the largest amount of oil injection.
- the object of the invention is to cool the oil used for bearing lubrication in a simple and economical manner, regardless of the total amount of oil injected into the compressor.
- a cooling device essentially comprises a screw compressor 1, a condenser 2 and an evaporator 3, which are connected in a closed refrigerant circuit by lines 4. Furthermore, there is a check valve 5 in the refrigerant circuit, which is arranged directly at the pressure outlet of the compressor, an oil separator 6, which is arranged behind the check valve 5 and in front of the condenser 2, and an expansion element 7, which is located between the condenser 2 and the evaporator 3 in the refrigerant circuit.
- a first temperature sensor 8 senses the temperature at the bearing points of the compressor 1 and is connected to a control unit 11 via an electrical line 9.
- a second Temperature sensor 12 senses the temperature in the pressure outlet area of the compressor 1 and is also connected to the control unit 11 via an electrical line 13.
- a main oil line 14 extends from the oil separator 6 and leads into the compression space of the compressor 1 via a solenoid valve 15.
- a bearing oil line 16 is branched off from the main oil line 14 and leads into a heat exchanger 17 and from there to the bearing points of the compressor 1.
- part of the refrigerant is branched off from the line 4 of the refrigerant circuit via a line 18, fed to a solenoid valve 20 which can be controlled by the control unit 11 via an electrical line 19, and passes from there via an injection nozzle 21 into the heat exchanger 17, from which it is fed to a point 22 of the compressor 1 at which the suction process of the compressor 1 caused by the rotors is completed.
- the cooling device operates as follows: The refrigerant evaporated in the evaporator 3 is drawn in on the suction side of the compressor 1 and is compressed therein. Oil is injected into the compression chamber of the compressor via the main oil line 14 and the solenoid valve 15. The oil is entrained by the refrigerant to be compressed, and the resulting oil-refrigerant mixture is compressed in the compressed state Check valve 5 fed to the oil separator 6. In the oil separator 6, the oil is separated from the refrigerant and, since it is under increased pressure, is injected back into the compressor 1 via the main oil line 14 and the solenoid valve 15 at a point of the compressor which is at a lower pressure. The oil is separated from the refrigerant so as not to adversely affect the heat transfer of the refrigerant within the refrigerant circuit and also to implement a closed main oil circuit.
- the control unit 11 opens the magnetic valve 20 via the electrical line 19 and coolant in a liquid state Form injected into the heat exchanger 17 via the line 18 and the injector 21.
- the oil branched off from the main oil line 14 via the bearing oil line 16 is cooled for cooling the bearing points by the refrigerant branched off behind the condenser 2, heat being supplied to the coolant and heat being removed from the oil used for lubricating the bearing points.
- the refrigerant evaporated in the heat exchanger 17 is fed to the suction side of the compressor, advantageously to a point 22 at which the suction process of the compressor 1 is completed.
- the injection at this point 22 of the compressor 1 is necessary because otherwise the cooling capacity of the compressor, ie the amount of heat absorbed by the environment in the evaporator 3 for evaporating the refrigerant, decreases because the refrigerant branched off for cooling the oil used for bearing lubrication does not transfer heat contributes in the evaporator 3. Furthermore, when the refrigerant is injected at the point 22 of the compressor 1, there is the advantage that the refrigerant coming from the heat exchanger 17 meets the partially compressed, warmer refrigerant in the compressor 1 and thereby cools the latter, which leads to an advantageous lower compression end temperature.
- the second temperature sensor 12 located in the pressure outlet area of the compressor 1 opens the solenoid valve 20 via the electrical line 13 through the control unit 11 and more refrigerant is injected into the heat exchanger 17 by means of the injection nozzle 21. than is necessary for cooling the oil used for bearing lubrication.
- the temperature sensor 12 or a further temperature sensor (not shown) in the pressure outlet region of the compressor 1 via the control unit 11 switches off the compressor.
- the main advantage of the controllable cooling of the oil used to lubricate the compressor bearing points according to the invention is that, despite the use of an oil with a low basic viscosity, a sufficient operating viscosity of the oil used for the bearing lubrication is achieved. Since the main oil flow in the main oil line, which is intended for injection into the compressor, remains uncooled, it is prevented that the compression end temperature does not drop to critical values and thus no refrigerant in the oil separator condenses into the oil. In addition, the cost of oil cooling is significantly reduced by the bearing oil cooling according to the invention and thus the economy is increased.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Sampling And Sample Adjustment (AREA)
- Surgical Instruments (AREA)
Claims (4)
- Dispositif de refroidissement pour un compresseur à piston rotatif (1), notamment un compresseur à vis faisant partie d'un circuit de réfrigérant conjointement avec un condenseur (2) et un évaporateur (3), un flux partiel (18) du réfrigérant de l'installation frigorifique et une huile (16) servant à la lubrification des paliers ainsi qu'au refroidissement et à l'étanchement du compresseur à vis pouvant être injectés dans le compresseur à vis, huile pour le refroidissement de laquelle on utilise un flux dérivé de réfrigérant qui est lui-même ensuite à nouveau amené au compresseur à vis, caractérisé en ce que seule la partie de l'huile servant à la lubrification des paliers du compresseur à vis (1) est refroidie par le flux dérivé de réfrigérant, en fonction de la température de l'huile qui est détectée au niveau des paliers.
- Dispositif selon la revendication 1, caractérisé en ce que le flux dérivé de réfrigérant peut en outre être régulé en fonction d'une température finale de compression s'obtenant à la suite de la compression.
- Dispositif selon la revendication 1 ou 2, caractérisé en ce que le flux dérivé de réfrigérant est amené au côté aspiration du compresseur à vis (1).
- Dispositif selon l'une des revendications précédentes, caractérisé en ce que le flux dérivé de réfrigérant est amené au compresseur à vis (1) en un point (22) où le processus d'aspiration du compresseur à vis (1) est achevé.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4122889 | 1991-07-11 | ||
DE4122889A DE4122889C1 (fr) | 1991-07-11 | 1991-07-11 | |
PCT/EP1992/001045 WO1993001413A1 (fr) | 1991-07-11 | 1992-05-13 | Dispositif frigorifique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0593495A1 EP0593495A1 (fr) | 1994-04-27 |
EP0593495B1 true EP0593495B1 (fr) | 1995-01-18 |
Family
ID=6435868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92909704A Expired - Lifetime EP0593495B1 (fr) | 1991-07-11 | 1992-05-13 | Dispositif frigorifique |
Country Status (7)
Country | Link |
---|---|
US (1) | US5433590A (fr) |
EP (1) | EP0593495B1 (fr) |
AT (1) | ATE117409T1 (fr) |
DE (1) | DE4122889C1 (fr) |
DK (1) | DK0593495T3 (fr) |
ES (1) | ES2067334T3 (fr) |
WO (1) | WO1993001413A1 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6082982A (en) * | 1997-11-17 | 2000-07-04 | Uop Llc | Flooded compressor with improved oil reclamation |
CN1283254A (zh) * | 1997-12-30 | 2001-02-07 | 爱特里尔斯布时股份公司 | 冷却装置 |
US6067804A (en) * | 1999-08-06 | 2000-05-30 | American Standard Inc. | Thermosiphonic oil cooler for refrigeration chiller |
DE19963170A1 (de) * | 1999-12-27 | 2001-06-28 | Leybold Vakuum Gmbh | Vakuumpumpe mit Wellendichtmitteln |
EP1571337B1 (fr) * | 2004-03-05 | 2007-11-28 | Corac Group plc | Compresseur sans huile pour gaz à plusieurs étages |
SE0402006L (sv) * | 2004-08-12 | 2005-10-18 | Peter Blomkvist | Värmepump |
US8590324B2 (en) | 2009-05-15 | 2013-11-26 | Emerson Climate Technologies, Inc. | Compressor and oil-cooling system |
EP2766676B1 (fr) * | 2011-09-16 | 2018-03-21 | Danfoss A/S | Circuits de refroidissement et de sous-refroidissement de moteur pour compresseur |
EP2573429B1 (fr) * | 2011-09-22 | 2014-04-23 | Moventas Gears Oy | Procédé de contrôle d'une pompe de lubrification d'une unité d'engrenage et unité d'engrenage |
EP2573388B1 (fr) * | 2011-09-22 | 2018-11-07 | Moventas Gears Oy | Procédé de contrôle d'une pompe de lubrification d'une unité d'engrenage et unité d'engrenage |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3176913A (en) * | 1960-07-22 | 1965-04-06 | Linde Eismasch Ag | Rotary compressor arrangement |
US3710590A (en) * | 1971-07-19 | 1973-01-16 | Vilter Manufacturing Corp | Refrigerant cooled oil system for a rotary screw compressor |
US3759348A (en) * | 1971-11-08 | 1973-09-18 | Maekawa Seisakusho Kk | Method of compressing chlorine gas |
SE360168B (fr) * | 1971-12-22 | 1973-09-17 | Stal Refrigeration Ab | |
DE2801408A1 (de) * | 1978-01-13 | 1979-07-19 | Linde Ag | Verfahren und vorrichtung zum kuehlen eines in einem kaeltekreislauf angeordneten verdichters der drehkolbenbauart |
FR2620205A1 (fr) * | 1987-09-04 | 1989-03-10 | Zimmern Bernard | Compresseur hermetique pour refrigeration avec moteur refroidi par gaz d'economiseur |
JPH0784955B2 (ja) * | 1989-04-26 | 1995-09-13 | ダイキン工業株式会社 | スクリュー冷凍機 |
-
1991
- 1991-07-11 DE DE4122889A patent/DE4122889C1/de not_active Expired - Fee Related
-
1992
- 1992-05-13 US US08/167,874 patent/US5433590A/en not_active Expired - Fee Related
- 1992-05-13 ES ES92909704T patent/ES2067334T3/es not_active Expired - Lifetime
- 1992-05-13 DK DK92909704.6T patent/DK0593495T3/da active
- 1992-05-13 WO PCT/EP1992/001045 patent/WO1993001413A1/fr active IP Right Grant
- 1992-05-13 EP EP92909704A patent/EP0593495B1/fr not_active Expired - Lifetime
- 1992-05-13 AT AT92909704T patent/ATE117409T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2067334T3 (es) | 1995-03-16 |
DE4122889C1 (fr) | 1992-12-17 |
EP0593495A1 (fr) | 1994-04-27 |
WO1993001413A1 (fr) | 1993-01-21 |
ATE117409T1 (de) | 1995-02-15 |
US5433590A (en) | 1995-07-18 |
DK0593495T3 (da) | 1995-04-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE60222720T2 (de) | Kühlanlage mit Antrieb mit veränderlicher Geschwindigkeit | |
DE69722146T2 (de) | Kälteanordnung mit einem Verdichter für ein- oder mehrstufigen Betrieb mit Leistungsregelung | |
EP0710807A2 (fr) | Machine frigorifique à compresseur | |
EP1719650B1 (fr) | Climatisation pour véhicule | |
DE19631914C2 (de) | Überkritisch betriebene Verdichter-Kältemaschine | |
EP0701096A2 (fr) | Procédé de fonctionnement d'une installation productrice de froid pour la climatisation de véhicules et installation productrice de froid pour sa mise en oeuvre | |
EP0593495B1 (fr) | Dispositif frigorifique | |
DE60123321T2 (de) | Verdichteranlage mit einem gesteuerten Kühlventilator | |
DE102004019364A1 (de) | Dampfkompressions-Kühlkreis mit Ejektorpumpe | |
DE69513765T2 (de) | Kälteanlage | |
DE69514936T2 (de) | Kühlsystem und verfahren | |
DE4119557A1 (de) | Vorrichtung mit kuehlkreislauf | |
DE102008005076A1 (de) | Kältemittelkreis und Verfahren zum Betreiben eines Kältemittelkreises | |
DE4212162C2 (de) | Einrichtung zur Kühlung des Elektromotors eines halbhermetischen Kältemittelverdichters | |
WO1982002588A1 (fr) | Agencement de pompes a chaleur | |
WO1980002869A1 (fr) | Pompe de circulation pour milieu liquide et/ou gazeux | |
EP2215412A1 (fr) | Installation pour le refroidissement, le chauffage ou la climatisation, en particulier installations frigorifiques | |
DE102012212227A1 (de) | Kälteanlage und Kraftfahrzeug mit einer Kälteanlage | |
DE3313429A1 (de) | Waermepumpenvorrichtung | |
EP0152608B1 (fr) | Procédé de commande d'une installation frigorifique complexe | |
DE102011012644A1 (de) | Kälteanlage | |
EP2473795A2 (fr) | Pompe à chaleur | |
DE102019119751B3 (de) | Verfahren zum Betreiben eines Kältekreislaufs eines Kraftfahrzeugs und Kältekreislauf | |
DE2438418A1 (de) | Gaskompressor der verdraengerbauart, insbesondere fuer kaeltemaschinen | |
DE19832682C2 (de) | Abtaueinrichtung für einen Verdampfer einer Wärmepumpe oder eines Klimageräts |
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: 19931214 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DK ES FR IT LI SE |
|
17Q | First examination report despatched |
Effective date: 19940502 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
ITF | It: translation for a ep patent filed | ||
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DK ES FR IT LI SE |
|
REF | Corresponds to: |
Ref document number: 117409 Country of ref document: AT Date of ref document: 19950215 Kind code of ref document: T |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2067334 Country of ref document: ES Kind code of ref document: T3 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
ET | Fr: translation filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Effective date: 19950513 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19950531 Ref country code: CH Effective date: 19950531 |
|
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 | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19970409 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19970410 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 19970513 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 19970516 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19970527 Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980514 Ref country code: ES Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 19980514 |
|
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: 19980531 Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980531 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980531 |
|
BERE | Be: lapsed |
Owner name: BITZER KUHLMASCHINENBAU G.M.B.H. & CO. K.G. Effective date: 19980531 |
|
EUG | Se: european patent has lapsed |
Ref document number: 92909704.6 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20000201 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20050513 |