EP1139038A1 - Refrigeration plant - Google Patents

Refrigeration plant Download PDF

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Publication number
EP1139038A1
EP1139038A1 EP01107908A EP01107908A EP1139038A1 EP 1139038 A1 EP1139038 A1 EP 1139038A1 EP 01107908 A EP01107908 A EP 01107908A EP 01107908 A EP01107908 A EP 01107908A EP 1139038 A1 EP1139038 A1 EP 1139038A1
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EP
European Patent Office
Prior art keywords
suction
compressors
suction manifold
lines
refrigeration system
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Granted
Application number
EP01107908A
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German (de)
French (fr)
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EP1139038B1 (en
Inventor
Klaus Koch
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Carrier Kaeltetechnik Deutschland GmbH
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Linde GmbH
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    • 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
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • 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
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors

Definitions

  • the invention relates to a refrigeration system with at least two connected in parallel Compressors, each via a suction line from at least one of the compressors upstream suction manifold suck the medium to be compressed.
  • From DE-OS 198 23 525 is a composite (cold) system with at least two compressors known in which an oil compensation line between the compressor housings is arranged that the lower edge of the provided on the compressor housings Connections of the oil compensation line above the minimum oil level of the Compressor lies.
  • the disadvantage here is that at different pressures in the compressors due to the resulting flows between the Compressed gas and oil exchange takes place. This has the consequence that in Depends on the operating time or the downtimes of the compressors can form different oil levels in the compressors.
  • the object of the present invention is to provide a refrigeration system in which the disadvantages mentioned can be avoided.
  • a refrigeration system which is thereby is distinguished by the fact that the compressor housing has at least one U-shaped tube Oil compensation line with each other and via at least one additional line with the Suction manifold are connected.
  • the compressor housings and the suction manifold are advantageously connecting lines at the lowest point of the suction manifold.
  • the refrigeration system according to the invention is further developed that the Inlet openings of those leading from the suction manifold to the compressors Suction lines are arranged in the upper area of the suction manifold.
  • This design of the refrigeration system according to the invention achieves an intake of oil through the suction lines into the compressor can be largely avoided.
  • Another advantageous embodiment of the refrigeration system according to the invention is distinguished is characterized in that in the lines between the compressor housing and the Suction manifold a filter device is arranged.
  • the figure shows three compressors V1 to V3 and a suction manifold S. Das zu compressing medium is divided over line 1, which is divided into two lines 2 and 2 ' is fed to the suction manifold S. From the suction manifold S that becomes compressing medium via the suction lines 3, 3 'and 3 "the compressors V1 to V3 fed. Oil entrained via lines 1, 2 and 2 'collects at the bottom of the Suction manifold S on. The compressed medium becomes the compressors V1 to V3 via the pressure lines 4, 4 'and 4 "into a pressure manifold 5 and via this for example one or more cooling points, not shown in the figure fed.
  • the compressors V1 to V3, which are arranged on one level, or their housing are now according to the invention via a U-tube-shaped compensating line 7, the via lines 8, 8 'and 8 "with the compressor housings V1 to V3 in Operational connection is established, interconnected. Between the compressor housings and the suction manifold S connecting lines 6, 6 'and 6 "are also provided.
  • This connecting lines 6, 6 'and 6 "and the suction manifold S takes place according to the invention the pressure equalization between the compressor housings V1 to V3. Furthermore, these connecting lines 6, 6 'and 6 "each have a filter device F1 to F3, which serve to remove dirt particles.
  • the refrigeration system according to the invention enables the implementation of a reliable one Oil supply to all compressors, since the oil compensation always involves pressure compensation connected is. Regardless of the current operating states of the compressors and the refrigeration system (full or partial load operation), can therefore be reliable at any time Oil supply to all compressors can be guaranteed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

Condenser casings (V1-V3) connect to each other via one or more U-shaped oil compensating pipes (7,8,8',8) and to a suction collecting tube (S) via one or more supplementary pipes (6,6',6). Inlets for suction pipes (3,3',3) running from the suction collecting tube to the condensers fit preferably in the upper area of the suction collecting tube.

Description

Die Erfindung betrifft eine Kälteanlage mit wenigstens zwei parallel geschalteten Verdichtem, die über jeweils eine Saugleitung aus wenigstens einem den Verdichtem vorgeschalteten Saugsammelrohr das zu verdichtende Medium ansaugen.The invention relates to a refrigeration system with at least two connected in parallel Compressors, each via a suction line from at least one of the compressors upstream suction manifold suck the medium to be compressed.

Bei Kälteanlagen stellt die betriebssichere Ölversorgung der Verdichter, die in einem gemeinsamen (Kältemittel)Kreislauf arbeiten, oftmals ein Problem dar. Zur Gewährleistung einer betriebssicheren Ölversorgung werden bisher unterschiedliche Ölstandsreguliersysteme, wie beispielsweise Ölspiegelregulatoren, verwendet. Diese unterliegen jedoch einem Verschleiss und erfordern bei anderen Systemen Einstellarbeiten am Ölsystem während der Inbetriebnahme. Zudem kann bei diesen Systemen überschüssiges Öl, das den Verdichtern über das angesaugte Gas zugeführt wird, nicht ausgeglichen werden.In refrigeration systems, the reliable oil supply to the compressors, which in one common (refrigerant) cycle, often pose a problem Guaranteeing a reliable oil supply have so far been different Oil level control systems, such as oil level regulators, are used. This however, are subject to wear and require other systems Adjustment work on the oil system during commissioning. In addition, with these Systems excess oil that passes the compressors through the gas fed, can not be compensated.

Aus DE-OS 198 23 525 ist eine Verbund(kälte)anlage mit wenigstens zwei Verdichtern bekannt, bei der zwischen den Verdichtergehäusen eine Ölausgleichsleitung dergestalt angeordnet ist, dass die Unterkante der an den Verdichtergehäusen vorgesehenen Anschlüsse der Ölausgleichsleitung über den Niveaus der Mindestölstände der Verdichter liegt. Nachteilig hierbei ist jedoch, dass bei unterschiedlichen Drücken in den Verdichtem aufgrund der dadurch entstehenden Strömungen zwischen den Verdichtem ein Gas- und Ölaustausch stattfindet. Dies hat zur Folge, dass sich in Abhängigkeit von der Betriebsdauer bzw. der Stillstandszeiten der Verdichter unterschiedliche Ölstände in den Verdichtern ausbilden können.From DE-OS 198 23 525 is a composite (cold) system with at least two compressors known in which an oil compensation line between the compressor housings is arranged that the lower edge of the provided on the compressor housings Connections of the oil compensation line above the minimum oil level of the Compressor lies. The disadvantage here is that at different pressures in the compressors due to the resulting flows between the Compressed gas and oil exchange takes place. This has the consequence that in Depends on the operating time or the downtimes of the compressors can form different oil levels in the compressors.

Aufgabe der vorliegenden Erfindung ist, eine Kälteanlage anzugeben, bei der die erwähnten Nachteile vermieden werden.The object of the present invention is to provide a refrigeration system in which the disadvantages mentioned can be avoided.

Zur Lösung dieser Aufgabe wird eine Kälteanlage vorgeschlagen, die sich dadurch auszeichnet, dass die Verdichtergehäuse über wenigstens eine U-Rohr-förmige Ölausgleichsleitung miteinander und über wenigstens eine zusätzliche Leitung mit dem Saugsammelrohr verbunden sind. To solve this problem, a refrigeration system is proposed, which is thereby is distinguished by the fact that the compressor housing has at least one U-shaped tube Oil compensation line with each other and via at least one additional line with the Suction manifold are connected.

Erfindungsgemäß werden nunmehr getrennte Leitungen für den Öl- sowie den Druckausgleich zwischen den einzelnen Verdichtergehäusen vorgesehen. Somit erfolgt der Ölausgleich über die U-Rohr-förmige Ausgleichsleitung, während der Druckausgleich über das Saugsammelrohr bzw. die das Saugsammelrohr und die Verdichtergehäuse verbindenden Leitungen erfolgt. Jeder der Verdichter ist daher neben der Saugleitung über wenigstens eine weitere Leitung mit dem Saugsammelrohr verbunden. Der mit dieser Konstruktion verbundene apparative Mehraufwand wird jedoch durch die erzielten bzw. erzielbaren Vorteile kompensiert.According to the invention, separate lines for the oil and the Pressure equalization between the individual compressor housings is provided. So it happens the oil compensation via the U-pipe-shaped compensation line, during the Pressure equalization via the suction manifold or the suction manifold and the Lines connecting the compressor housing. Each of the compressors is therefore in addition to the suction line via at least one further line with the suction manifold connected. The additional equipment associated with this construction becomes however compensated by the achieved or achievable advantages.

In vorteilhafter Weise sind die die Verdichtergehäuse und das Saugsammelrohr verbindenden Leitungen am tiefsten Punkt des Saugsammelrohres angeordnet.The compressor housings and the suction manifold are advantageously connecting lines at the lowest point of the suction manifold.

Auf diese Weise wird - da sich das Öl am Boden des Saugsammelrohres ansammelt-sichergestellt, dass das Öl aus dem Saugsammelrohr schnellstmöglich abgezogen und den Verdichtergehäusen zugeführt wird.In this way - since the oil collects at the bottom of the suction manifold - it is ensured that the oil is drawn out of the suction manifold as soon as possible and is fed to the compressor housings.

Die erfindungsgemäße Kälteanlage weiterbildend wird vorgeschlagen, dass die Einlassöffnungen der aus dem Saugsammelrohr zu den Verdichtern führenden Saugleitungen im oberen Bereich des Saugsammelrohres angeordnet sind.The refrigeration system according to the invention is further developed that the Inlet openings of those leading from the suction manifold to the compressors Suction lines are arranged in the upper area of the suction manifold.

Durch diese konstruktive Ausgestaltung der erfindungsgemäßen Kälteanlage wird erreicht, dass ein Ansaugen von Öl über die Saugleitungen in die Verdichter weitestgehend vermieden werden kann.This design of the refrigeration system according to the invention achieves an intake of oil through the suction lines into the compressor can be largely avoided.

Eine weitere vorteilhafte Ausgestaltung der erfindungsgemäßen Kälteanlage zeichnet sich dadurch aus, dass in den Leitungen zwischen den Verdichtergehäusen und dem Saugsammelrohr je eine Filtervorrichtung angeordnet ist.Another advantageous embodiment of the refrigeration system according to the invention is distinguished is characterized in that in the lines between the compressor housing and the Suction manifold a filter device is arranged.

Wurden bisher ein oder mehrere, parallel angeordnete, entsprechend groß dimensionierte und damit leistungsmindernde Filter in der in das Saugsammelrohr führenden Saugleitung vorgesehen, reichen nunmehr vergleichsweise klein dimensionierte Filter in den dem Gaseausgleich dienenden Leitungen zwischen den Verdichtergehäusen und dem Saugsammelrohr aus. Da ca. 98 % der in dem zu verdichtenden Medium enthaltenen Schmutzpartikel an das Öl bzw. die Öltröpfchen "gebunden" sind und von diesem bzw. diesen transportiert werden, kann mit diesen Filtern ein ausreichendes Reinigungsergebnis erzielt werden.So far, one or more, arranged in parallel, were correspondingly large dimensioned and thus performance-reducing filters in the suction manifold leading suction line provided, are now comparatively small dimensioned filters in the gas balancing lines between the Compressor housing and the suction manifold. Because about 98% of those in that too compacting medium contain dirt particles to the oil or the oil droplets are "bound" and transported by this or these can with these Filters a sufficient cleaning result can be achieved.

Die erfindungsgemäße Kälteanlage sowie weitere Ausgestaltungen derselben seien anhand des in der Figur dargestellten Ausführungsbeispiels näher erläutert.The refrigeration system according to the invention and further refinements thereof are based on the embodiment shown in the figure.

Die Figur zeigt drei Verdichter V1 bis V3 sowie ein Saugsammelrohr S. Das zu verdichtende Medium wird über Leitung 1, die in zwei Leitungen 2 und 2' aufgeteilt wird, dem Saugsammelrohr S zugeführt. Aus dem Saugsammelrohr S wird das zu verdichtende Medium über die Saugleitungen 3, 3' und 3" den Verdichtem V1 bis V3 zugeführt. Über die Leitungen 1, 2 und 2' mitgerissenes Öl sammelt sich am Boden des Saugsammelrohres S an. Das verdichtete Medium wird aus den Verdichtern V1 bis V3 über die Druckleitungen 4, 4' und 4" in eine Drucksammelleitung 5 und über diese beispielsweise einer oder mehrerer, in der Figur nicht dargestellter Kühlstellen zugeführt.The figure shows three compressors V1 to V3 and a suction manifold S. Das zu compressing medium is divided over line 1, which is divided into two lines 2 and 2 ' is fed to the suction manifold S. From the suction manifold S that becomes compressing medium via the suction lines 3, 3 'and 3 "the compressors V1 to V3 fed. Oil entrained via lines 1, 2 and 2 'collects at the bottom of the Suction manifold S on. The compressed medium becomes the compressors V1 to V3 via the pressure lines 4, 4 'and 4 "into a pressure manifold 5 and via this for example one or more cooling points, not shown in the figure fed.

Die Verdichter V1 bis V3, die auf einer Ebene angeordnet sind, bzw. deren Gehäuse werden nunmehr erfindungsgemäß über eine U-Rohr-förmige Ausgleichsleitung 7, die über die Leitungen 8, 8' und 8" mit dem Verdichtergehäusen V1 bis V3 in Wirkverbindung steht, miteinander verbunden. Zwischen den Verdichtergehäusen und dem Saugsammelrohr S sind ferner Verbindungsleitungen 6, 6' und 6" vorgesehen.The compressors V1 to V3, which are arranged on one level, or their housing are now according to the invention via a U-tube-shaped compensating line 7, the via lines 8, 8 'and 8 "with the compressor housings V1 to V3 in Operational connection is established, interconnected. Between the compressor housings and the suction manifold S connecting lines 6, 6 'and 6 "are also provided.

Über diese Verbindungsleitungen 6, 6' und 6" sowie das Saugsammelrohr S erfolgt erfindungsgemäß der Druckausgleich zwischen den Verdichtergehäusen V1 bis V3. Ferner weisen diese Verbindungsleitungen 6, 6' und 6" je eine Filtervorrichtung F1 bis F3, die der Entfernung von Schmutzpartikeln dienen, auf.This connecting lines 6, 6 'and 6 "and the suction manifold S takes place according to the invention the pressure equalization between the compressor housings V1 to V3. Furthermore, these connecting lines 6, 6 'and 6 "each have a filter device F1 to F3, which serve to remove dirt particles.

Die erfindungsgemäße Kälteanlage ermöglicht die Realisierung einer zuverlässigen Ölversorgung aller Verdichter, da der Ölausgleich immer mit einem Druckausgleich verbunden ist. Unabhängig von den aktuellen Betriebszuständen der Verdichter und der Kälteanlage (Voll-, Teillastbetrieb), kann somit zu jeder Zeit eine betriebssichere Ölversorgung aller Verdichter gewährleistet werden.The refrigeration system according to the invention enables the implementation of a reliable one Oil supply to all compressors, since the oil compensation always involves pressure compensation connected is. Regardless of the current operating states of the compressors and the refrigeration system (full or partial load operation), can therefore be reliable at any time Oil supply to all compressors can be guaranteed.

Claims (4)

Kälteanlage mit wenigstens zwei parallel geschalteten Verdichtem, die über jeweils eine Saugleitung aus wenigstens einem den Verdichtern vorgeschalteten Saugsammelrohr das zu verdichtende Medium ansaugen, dadurch gekennzeichnet, dass die Verdichtergehäuse (V1, V2, V3) über wenigstens eine U-Rohr-förmige Ölausgleichsleitung (7, 8, 8', 8") miteinander und über wenigstens eine zusätzliche Leitung (6, 6', 6") mit dem Saugsammelrohr (S) verbunden sind.Refrigeration system with at least two compressors connected in parallel, each of which draws in the medium to be compressed via at least one suction line from at least one suction manifold upstream of the compressors, characterized in that the compressor housing (V1, V2, V3) has at least one U-tube-shaped oil compensation line (7 , 8, 8 ', 8 ") with each other and with at least one additional line (6, 6', 6") with the suction manifold (S). Kälteanlage nach Anspruch 1, dadurch gekennzeichnet, dass die die Verdichtergehäuse (V1, V2, V3) und das Saugsammelrohr (S) verbindenden Leitungen (6, 6', 6") am tiefsten Punkt des Saugsammelrohres (S) angeordnet sind.Refrigeration system according to claim 1, characterized in that the lines (6, 6 ', 6 ") connecting the compressor housings (V1, V2, V3) and the suction manifold (S) are arranged at the lowest point of the suction manifold (S). Kälteanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Einlassöffnungen der aus dem Saugsammelrohr (S) zu den Verdichtern (V1, V2, V3) führenden Saugleitungen (3, 3', 3") im oberen Bereich des Saugsammelrohres (S) angeordnet sind.Refrigeration system according to claim 1 or 2, characterized in that the inlet openings of the suction lines (3, 3 ', 3 ") leading from the suction collecting pipe (S) to the compressors (V1, V2, V3) are arranged in the upper region of the suction collecting pipe (S) are. Kälteanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in den Leitungen (6, 6', 6") zwischen den Verdichtergehäusen (V1, V2, V3) und dem Saugsammelrohr (S) je eine Filtervorrichtung (V1, V2, V3) angeordnet ist.Refrigeration system according to one of the preceding claims, characterized in that a filter device (V1, V2, V3) is arranged in the lines (6, 6 ', 6 ") between the compressor housings (V1, V2, V3) and the suction manifold (S) is.
EP01107908A 2000-03-29 2001-03-28 Refrigeration plant Expired - Lifetime EP1139038B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10015603 2000-03-29
DE10015603A DE10015603A1 (en) 2000-03-29 2000-03-29 Refrigeration system

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EP1139038A1 true EP1139038A1 (en) 2001-10-04
EP1139038B1 EP1139038B1 (en) 2006-07-12

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AT (1) ATE333077T1 (en)
DE (2) DE10015603A1 (en)
ES (1) ES2269246T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1418389A1 (en) * 2002-11-08 2004-05-12 Linde Kältetechnik GmbH & Co.KG Refrigerating system
EP1510693A2 (en) * 2003-08-29 2005-03-02 Samsung Electronics Co., Ltd. Oil level equalizing system for multiple compressors
WO2005103492A1 (en) * 2004-04-20 2005-11-03 Danfoss Commercial Compressors Gas distribution device
WO2009012795A1 (en) * 2007-07-24 2009-01-29 Carrier Corrporation Manifold for a multi-compressor refrigeration system
US20150184906A1 (en) * 2012-08-09 2015-07-02 Thermo King Corporation Methods and devices to prevent fluid migration in a refrigeration system during an off cycle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104567147B (en) * 2013-10-23 2017-02-15 珠海格力电器股份有限公司 Gas-liquid separation device and refrigerating unit

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JPH07247961A (en) * 1994-03-10 1995-09-26 Mitsubishi Heavy Ind Ltd Refrigerating air conditioner
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US3633377A (en) * 1969-04-11 1972-01-11 Lester K Quick Refrigeration system oil separator
US3581519A (en) * 1969-07-18 1971-06-01 Emhart Corp Oil equalization system
EP0094590A2 (en) * 1982-05-19 1983-11-23 Linde Aktiengesellschaft Plant in which a refrigerant is circulated
US5327997A (en) * 1993-01-22 1994-07-12 Temprite, Inc. Lubrication management system
JPH07247961A (en) * 1994-03-10 1995-09-26 Mitsubishi Heavy Ind Ltd Refrigerating air conditioner
US5911289A (en) * 1994-06-17 1999-06-15 Waller; Clive Gregory Oil level control apparatus
EP0838640A2 (en) * 1996-10-28 1998-04-29 Matsushita Refrigeration Company Oil level equalizing system for plural compressors
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1418389A1 (en) * 2002-11-08 2004-05-12 Linde Kältetechnik GmbH & Co.KG Refrigerating system
EP1510693A2 (en) * 2003-08-29 2005-03-02 Samsung Electronics Co., Ltd. Oil level equalizing system for multiple compressors
EP1510693A3 (en) * 2003-08-29 2009-09-23 Samsung Electronics Co., Ltd. Oil level equalizing system for multiple compressors
WO2005103492A1 (en) * 2004-04-20 2005-11-03 Danfoss Commercial Compressors Gas distribution device
WO2009012795A1 (en) * 2007-07-24 2009-01-29 Carrier Corrporation Manifold for a multi-compressor refrigeration system
US20150184906A1 (en) * 2012-08-09 2015-07-02 Thermo King Corporation Methods and devices to prevent fluid migration in a refrigeration system during an off cycle

Also Published As

Publication number Publication date
EP1139038B1 (en) 2006-07-12
DE50110427D1 (en) 2006-08-24
ES2269246T3 (en) 2007-04-01
DE10015603A1 (en) 2001-10-04
ATE333077T1 (en) 2006-08-15

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