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EP0943879B1 - Dispositif permettant d'optimiser l'écoulement de fluide frigorigène fourni à un évaporateur d'un circuit frigorifique et agissant comme réducteur de niveau de bruit d'expansion - Google Patents

Dispositif permettant d'optimiser l'écoulement de fluide frigorigène fourni à un évaporateur d'un circuit frigorifique et agissant comme réducteur de niveau de bruit d'expansion Download PDF

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Publication number
EP0943879B1
EP0943879B1 EP99103641A EP99103641A EP0943879B1 EP 0943879 B1 EP0943879 B1 EP 0943879B1 EP 99103641 A EP99103641 A EP 99103641A EP 99103641 A EP99103641 A EP 99103641A EP 0943879 B1 EP0943879 B1 EP 0943879B1
Authority
EP
European Patent Office
Prior art keywords
tube
refrigerant fluid
evaporator
seat
flow
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
Application number
EP99103641A
Other languages
German (de)
English (en)
Other versions
EP0943879A3 (fr
EP0943879A2 (fr
Inventor
Carlo Whirlpool Europe s.r.l. Genoni
Whirlpool Europe s.r.l. Maritan Marco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Publication of EP0943879A2 publication Critical patent/EP0943879A2/fr
Publication of EP0943879A3 publication Critical patent/EP0943879A3/fr
Application granted granted Critical
Publication of EP0943879B1 publication Critical patent/EP0943879B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound

Definitions

  • This invention relates to a device in accordance with the introduction to the main claim.
  • a refrigeration circuit is known to comprise a compressor, a condenser, an expansion member and a evaporator.
  • the expansion member is usually (but not necessarily) a tube of very small transverse dimensions or a so-called capillary tube (or simply a capillary). This latter is usually arranged with at least its end part positioned within a containing tube or conduit connected to the evaporator.
  • US-A-3 815 379 A device for optimizing the flow of refrigerant is disclosed by US-A-3 815 379.
  • the capillary tube type expansion member disclosed in such document is a relatively short tube supported in a housing and does not prevent vibration problems typical of capillary tubes.
  • US-A-5 097 866 discloses a refrigerant meter device in which the capillary tube type expansion member is replaced by a porous body.
  • An object of this invention is to provide a device which enables the noise generated where the capillary opens into the containing tube or conduit to be reduced.
  • a further object is to provide a device of the aforesaid type which enables the flow of fluid leaving the capillary and directed towards the evaporator to be improved.
  • a further object is to provide a device of the aforesaid type which is of low constructional cost and is inexpensive to position within the refrigeration circuit.
  • a capillary tube (or capillary) 1 comprises a terminal portion 2 inserted in known manner in a containing tube or conduit 3 associated with an evaporator (not shown) of a refrigeration circuit.
  • the conduit 3 comprises a funnel part 3A into which the capillary is inserted and which acts as the retaining element for this latter.
  • the conduit can terminate with this part 3A or be joined to a further tube 3B, for example for returning the refrigerant fluid from the evaporator.
  • the refrigeration circuit also comprises in known manner a known condenser and compressor, which are not shown.
  • a refrigerant fluid directed towards the evaporator flows through the capillary 1 in the direction of the arrow F of Figure 1.
  • This capillary has a free end 5, open at 6, through which the refrigerant fluid passes into the conduit 3 directed towards the evaporator.
  • the refrigerant fluid contains a portion of a lubricant fluid used in the compressor in known manner to lubricate the moving parts.
  • the body 10 is constructed of porous material to enable the refrigerant fluid to correctly flow towards the evaporator.
  • the body 10 can be of sintered metal, such as copper and its alloys or steel.
  • it can be of porous resin or a porous mixture of various materials such as silica gel together with calcium sulphate, aluminosilicate and alumina.
  • Said body 10 cooperates with the inner wall 12 of the containing tube 3. It preferably engages said wall with a degree of clearance so as to create an interspace 13 therewith through which the refrigerant fluid can in any event flow to the evaporator should the pores in the body 10 become clogged during the course of time because of absorption of any impurities present in the refrigerant fluid (for example in the aforesaid small portion of lubricant fluid).
  • This interspace (possibly formed by providing surface recesses in the body 10 in proximity to the wall 12 of the tube 3) allows flow towards the evaporator while at the same time allowing the capillary 1 to undergo small movements within the tube 3.
  • the capillary is hence only limitedly stiffened, thus preventing its possible fracture.
  • the body 10 is retained in the tube 3 by annular deformations or plastic points 15 on this latter, which define constrictions within the tube and delimit the seat for said body.
  • the portion 7 of the capillary 1 is inserted into the seat 9 of the body 10.
  • This seat is flared at least in proximity to its opening 18, to act as a lead-in for the insertion of the capillary into it.
  • the seat is closed at its other end 19, the refrigerant fluid being able to pass beyond the body 10 only by passing through its pores. Said flared part can extend to different lengths within the seat 9 and have different diameters.
  • this seat has a part 17 of larger diameter than that in Figure 3. In this manner a safety conduit is formed for the refrigerant fluid which, if the pores of the body 10 become clogged, can flow through this conduit 17, through the interspace 13 and continue towards the evaporator.
  • the conduit 17 can either be continuous about the capillary (ie the part 17 is always of greater diameter than the capillary) or can comprise a plurality of conduit parts providing the aforesaid safety. In all cases the body is fixed non-removably by interference at the end 5.
  • the body 10 acts as an absorber for this noise and hence as a silencer.
  • the body also acts as a capillary vibration absorber.
  • the body acts indirectly as an element for filtering any moisture present in the refrigerant fluid, if suitably dimensioned.
  • the body 10 is of differential density (lower at the capillary 1 and higher at its free end 22 in the direction of the refrigerant flow), this improving the passage of this refrigerant against any impurities present in it.
  • This end can be shaped as a plurality of wires with arms extending in the direction of refrigerant flow, thus making this flow more laminar and optimizing it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Pipe Accessories (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Air-Conditioning For Vehicles (AREA)

Claims (10)

  1. Dispositif pour optimiser, dans un circuit de réfrigération, l'écoulement du fluide réfrigérant envoyé à un évaporateur par l'intermédiaire d'un élément d'expansion (1) du type tube capillaire et pour réduire le niveau de bruit d'expansion, comprenant un corps (10) constitué par un matériau poreux et positionné de manière à correspondre à une extrémité libre (5) dudit élément d'expansion (1) le long du trajet du fluide réfrigérant en direction de l'évaporateur, et un tube de logement (3), dans lequel ledit élément (1) est positionné et dans lequel le corps (10) est fixé, ledit élément d'expansion étant un tube capillaire (1), et au moins une partie (7) de ladite extrémité libre (5) dudit tube capillaire (1) est insérée dans un siège (9) du corps (10).
  2. Dispositif selon la revendication 1, caractérisé en ce que son corps en matériau poreux (10) est formé d'un métal fritté.
  3. Dispositif selon la revendication 1, caractérisé en ce son corps (10) est formé d'une résine poreuse.
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que la densité de son corps (10) varie lorsqu'on passe de l'une de ses extrémités à l'autre (22) dans la direction de l'écoulement du fluide réfrigérant.
  5. Dispositif selon la revendication 1, caractérisé en ce que son corps (10) comprend un siège (9) contenant la partie (7) de l'extrémité (5) du tube capillaire (1), ledit siège étant au moins partiellement conique (en 17).
  6. Dispositif selon la revendication 5, caractérisé en ce que le siège (9) de son corps (10) est fermé à l'une (19) de ses extrémités.
  7. Dispositif selon la revendication 1, caractérisé en ce que le siège (9) du corps (10) comprend au moins un canal (17) autour de la partie (7) du tube capillaire (1), un espace intercalaire (13) étant prévu entre le corps (10) et une paroi (12) du tube de logement (3).
  8. Dispositif selon la revendication 7, caractérisé en ce que l'espace intercalaire se présente sous la forme de canaux superficiels prévus dans le corps (10) de manière à correspondre à la paroi (12).
  9. Dispositif selon la revendication 1, caractérisé en ce que le tube de logement (3) comprend des parties déformées (15) définissant des étranglements dans ledit tube, ces derniers étant espacés le long du tube (3) de manière à loger entre eux le corps (10) en matériau poreux.
  10. Dispositif selon la revendication 1, caractérisé en ce que le corps en matériau poreux contient, à distance de l'extrémité (18), une extrémité (22), au moyen de laquelle le tube capillaire (1) est inséré dans le siège (9) du corps, et est conformé de manière à produire un écoulement laminaire du fluide réfrigérant au-delà du corps dans la direction dudit écoulement, en optimisant ainsi ledit écoulement de fluide dirigé vers l'évaporateur.
EP99103641A 1998-03-20 1999-02-25 Dispositif permettant d'optimiser l'écoulement de fluide frigorigène fourni à un évaporateur d'un circuit frigorifique et agissant comme réducteur de niveau de bruit d'expansion Expired - Lifetime EP0943879B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI980200 1998-03-20
IT1998MI000200U IT243877Y1 (it) 1998-03-20 1998-03-20 Dispositivo ottimizzatore del flusso di fluido refrigerante inviatoad un evaporatore di un circuito di refrigerazione ed agente come
ITMI980200U 1998-03-20

Publications (3)

Publication Number Publication Date
EP0943879A2 EP0943879A2 (fr) 1999-09-22
EP0943879A3 EP0943879A3 (fr) 2000-03-22
EP0943879B1 true EP0943879B1 (fr) 2004-07-28

Family

ID=11378805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99103641A Expired - Lifetime EP0943879B1 (fr) 1998-03-20 1999-02-25 Dispositif permettant d'optimiser l'écoulement de fluide frigorigène fourni à un évaporateur d'un circuit frigorifique et agissant comme réducteur de niveau de bruit d'expansion

Country Status (5)

Country Link
EP (1) EP0943879B1 (fr)
DE (1) DE69918885T2 (fr)
ES (1) ES2224472T3 (fr)
IT (1) IT243877Y1 (fr)
PT (1) PT943879E (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006007921U1 (de) * 2006-04-28 2007-08-30 Liebherr-Hausgeräte Lienz Gmbh Kühl- und/oder Gefriergerät
DE102021127811A1 (de) 2021-08-26 2023-03-02 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2812076B1 (fr) * 2000-07-20 2006-01-27 Manuli Auto France Dispositif detendeur pour fluide frigorigene et circuit de conditionnement comprenant un tel dispositif
DE20104425U1 (de) * 2001-03-14 2002-07-25 Liebherr-Werk Lienz Ges.M.B.H., Lienz Kühl- und/oder Gefriergerät
JP2003075027A (ja) * 2001-08-31 2003-03-12 Matsushita Electric Ind Co Ltd 空気調和機の消音装置
WO2014198555A1 (fr) 2013-06-10 2014-12-18 Arcelik Anonim Sirketi Dispositif de refroidissement comprenant un régulateur d'écoulement
DE102013015072A1 (de) * 2013-07-01 2015-01-08 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
WO2015050514A1 (fr) 2013-10-03 2015-04-09 Arcelik Anonim Sirketi Dispositif de refroidissement comprenant un régulateur d'écoulement
DE102015003178A1 (de) * 2015-01-14 2016-07-14 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät
EP4141356A1 (fr) * 2021-08-26 2023-03-01 Liebherr-Hausgeräte Ochsenhausen GmbH Appareil de refroidissement et/ou de congélation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2576610A (en) * 1944-04-10 1951-11-27 Gen Motors Corp Restricter
GB1307533A (en) * 1970-01-15 1973-02-21 Dunlop Holdings Ltd Pressure reducing devices
DE7338368U (de) * 1972-10-30 1974-04-04 General Motors Corp Klimagerät, vorzugsweise für Automobile
JPH0480576A (ja) * 1990-07-24 1992-03-13 Matsushita Refrig Co Ltd 接続管
US5097866A (en) * 1990-07-30 1992-03-24 Carrier Corporation Refrigerant metering device
JPH06249545A (ja) * 1993-02-24 1994-09-06 Matsushita Refrig Co Ltd 冷却システム
US5581883A (en) * 1995-02-27 1996-12-10 Whirlpool Corporation Method of assembling an expansion device for a refrigeration system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006007921U1 (de) * 2006-04-28 2007-08-30 Liebherr-Hausgeräte Lienz Gmbh Kühl- und/oder Gefriergerät
DE102021127811A1 (de) 2021-08-26 2023-03-02 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und/oder Gefriergerät

Also Published As

Publication number Publication date
ITMI980200U1 (it) 1999-09-20
EP0943879A3 (fr) 2000-03-22
ES2224472T3 (es) 2005-03-01
PT943879E (pt) 2004-11-30
EP0943879A2 (fr) 1999-09-22
DE69918885D1 (de) 2004-09-02
IT243877Y1 (it) 2002-03-06
DE69918885T2 (de) 2005-07-28

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