EP1910726A1 - Conduite de fluide frigorigene - Google Patents

Conduite de fluide frigorigene

Info

Publication number
EP1910726A1
EP1910726A1 EP06776405A EP06776405A EP1910726A1 EP 1910726 A1 EP1910726 A1 EP 1910726A1 EP 06776405 A EP06776405 A EP 06776405A EP 06776405 A EP06776405 A EP 06776405A EP 1910726 A1 EP1910726 A1 EP 1910726A1
Authority
EP
European Patent Office
Prior art keywords
inner liner
refrigerant pipe
pipe according
metal hose
refrigerant
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.)
Withdrawn
Application number
EP06776405A
Other languages
German (de)
English (en)
Inventor
Carlo Burkhardt
Carsten Ilg
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.)
Witzenmann GmbH
Original Assignee
Witzenmann GmbH
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 Witzenmann GmbH filed Critical Witzenmann GmbH
Publication of EP1910726A1 publication Critical patent/EP1910726A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/115—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements not embedded in the wall

Definitions

  • the invention relates to a refrigerant line for use in air conditioning in particular of motor vehicles, consisting of a corrugated metal hose and an inner liner made of plastic, wherein the inner liner rests in partial areas on the radially inner side of the surrounding metal hose and radially opposite outer wave crests of the metal tube radially spaced is.
  • the inner liner described in said document which is referred to there as a support tube consists of polyamide, is heated after insertion into the corrugated tube and subjected to internal pressure to apply to the inner wall of the metal tube at least in the region of the radially inner troughs and to conserve the desired shape of the air conditioning line.
  • the support hose for the metal corrugated hose forms a skeleton, by means of which an axial stabilization of the corrugated hose is achieved and the corrugation of the corrugated hose is subject only to a slight bending cycle stress.
  • the Applicant has set forth on this basis, further requirements for the refrigerant pipe, which are just not or only partially met by the described in DE-A 102 41 504 refrigerant pipe with integrated support hose:
  • the refrigerant pipe - in contrast to the subject matter of DE 102 41 504 - be as mobile as possible to fulfill their intended function of recording larger movements; on the other hand, the refrigerant line should have a high pressure pulsation resistance for receiving pressure peaks of any pressure pulsations of the refrigerant so as to improve the life of the line. While you can get the increased pressure pulsation especially on a high wall thickness of the metal hose, a small wall thickness of the metal hose is required for the high mobility of the refrigerant pipe. It is accordingly an object of the present invention to provide a refrigerant pipe of the type mentioned above, which meets both actually contradictory requirements.
  • the inner liner is elastically yielding in relation to the radial direction in that it consists of PTFE or a PTFE composite material and that the wall thickness of the inner liner in the range between 0.1 to 1, 0 mm.
  • a buffer area is provided in each case between the inner liner and the wave crests of the metal hose spaced therefrom so that the inner liner can extend at least partially and for a short time radially outwardly into these buffer areas when the pressure peaks of any pressure pulsations of the refrigerant occur.
  • the present invention refrains from making the air conditioning line stiffer in order to be able to absorb higher pressure peaks; instead, it builds up the refrigerant piping 3-ply, ie outer metal tube, inner inner liner and buffer area provided therebetween, the buffer area ensuring that the inner liner evades at pressure peaks in the direction of the wave peaks spaced apart from it and can thus absorb these pressure peaks.
  • This makes it possible to form the extremely thin-walled metal hose supported by the innerliner and, together with the inner liner made of PTFE, to obtain a flexible refrigerant line as a whole.
  • the wall thickness of the inner liner is in the range between 0.25 mm to 0.6 mm and in particular between 0.4 mm to 0.6 mm, wherein the radial cross section of the inner liner is generally made round, but also formed polygonal can be.
  • the modulus of elasticity of the inner liner is less than that of the metal hose and in particular less than one-hundredth of its modulus of elasticity.
  • the inner liner expediently extends over the entire axial length of the metal tube; but it can also extend only over partial areas, if the required Druckpulsationsfestmaschine allows this.
  • the innerliner is usually provided with a smooth flow surface so as not to unnecessarily increase the pressure loss;
  • a structured surface recommend, which must not necessarily have a negative effect on the pressure loss of the flow medium.
  • the inner liner abuts against the inside of the metal hose in the region of the radially inner wave troughs of the metal hose and expediently engages at least partially positively in the corrugations of the metal hose, wherein the inner liner and the metal hose either at least one terminal connection element or not at Axial direction are fixed to each other.
  • Figure 1 is a refrigerant line in a schematic side view
  • Figure 2 shows the axial section through part of a refrigerant pipe according to the invention
  • FIG. 3 shows the refrigerant line from FIG. 2 with additional components
  • FIG. 4 shows an axial section through part of an alternative refrigerant line according to the invention.
  • FIG. 5 shows the refrigerant line from FIG. 4 with additional components.
  • a refrigerant pipe 1 which consists of two rigid connection elements 2, 3 in the form of smooth-walled tubes and arranged between the two pipes flexible conduit element 4.
  • This flexible conduit element is explained in more detail in Figures 2 to 5, there by the here used main components are shown:
  • FIG. 2 shows a metal tube 5 with an annular corrugation, which has radially outer wave peaks 6 and radially inner wave troughs 7.
  • a cylindrical inner liner 8 At the radially inner wave troughs 7 is a cylindrical inner liner 8 over a substantial portion of the metal tube 5, wherein between the metal tube 5, in particular in the region of its wave peaks 6 and the inner liner 8 in the mutual Beabstan- ding area buffer areas 9 are left, the annular around the inner liner circulate.
  • the inner liner 8 can be prevented due to its PTFE material and its thin wall thickness. Preferably dodge between 0.4 and 0.6 mm radially outward in these buffer areas 9 and so intercept these pressure peaks and keep away from the wave crests. If, after some time, a pressure equilibrium is established between the buffer regions 9 and the flow interior 10, the inner liner can again move elastically back into its initial state.
  • FIG. 3 shows a possible use of the main components from FIG. 2, namely by providing a silicone casing 11 on the radial outside of the metal hose 6, which is preferably incompressible and thus protects the metal hose 6 against further deformations.
  • a conventional braid 12 of intersecting metal wires for axial support of the metal tube or the elastic element 4 of the refrigerant line 1 is finally provided.
  • the braided hose 12 is fixed to the two axial terminal connection elements 2a, 3a.
  • FIG. 4 now shows a construction which essentially corresponds to the variant from FIGS. 2 and 3 (for which reason identical parts are provided with the same reference numerals), whereby only one inner liner 18 is provided which, in contrast to the inner liner 8 from FIGS. 2 and 3 - Is not executed exactly smooth cylindrical, but slightly wavy.
  • the inner liner 18 extends in itself with the wave crests 6 of the
  • Metal hose 5 overlapping areas slightly radially outwardly into the buffer areas 9 and slightly reduces these buffer areas. Due to the corrugated shape of the inner liner 18, this is connected in a form-fitting manner to the metal hose 5 and is thus prevented from shifting in the axial direction relative to the metal hose 5.
  • FIG. 5 shows - in accordance with FIG. 3 - a silicone sheath 11 and a braided hose 12, also in the second embodiment according to FIG. 4 with corrugated inner liner 18.
  • the present invention enables two contradictory requirements, namely mobility on the one hand, and stability or compressive strength, on the other hand, to be met by the new refrigerant line by adding an additional element to the corrugated metal hoses, namely a PTFE innerliner on the one hand does not affect the mobility of the metal tube and on the other hand but intercepts the pressure peaks of the flow medium.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention concerne une conduite de fluide frigorigène (1) destinée à être employée dans des climatisations de véhicules, comportant un flexible métallique ondulé (5) et une garniture intérieure plastique (8, 18). Par rapport à la direction radiale, la garniture intérieure (8, 18) est souple de façon élastique du fait qu'elle est composée de PTFE ou d'un composite de PTFE et que l'épaisseur de la paroi est de 0,1 à 1,0 mm. La garniture intérieure (8,18) s'appuie par ailleurs dans certaines zones contre le côté intérieur radial du flexible métallique (5) qui l'entoure et est espacée radialement par rapport à des crêtes (6) radialement extérieures du flexible métallique (5), de telle manière qu'une zone tampon (9) est créée entre la garniture intérieure (8, 18) et le flexible métallique (5).
EP06776405A 2005-08-06 2006-07-26 Conduite de fluide frigorigene Withdrawn EP1910726A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510037167 DE102005037167A1 (de) 2005-08-06 2005-08-06 Kältemittelleitung
PCT/EP2006/007346 WO2007017103A1 (fr) 2005-08-06 2006-07-26 Conduite de fluide frigorigene

Publications (1)

Publication Number Publication Date
EP1910726A1 true EP1910726A1 (fr) 2008-04-16

Family

ID=37027877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06776405A Withdrawn EP1910726A1 (fr) 2005-08-06 2006-07-26 Conduite de fluide frigorigene

Country Status (3)

Country Link
EP (1) EP1910726A1 (fr)
DE (1) DE102005037167A1 (fr)
WO (1) WO2007017103A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007049852A1 (de) * 2007-10-18 2009-05-20 Witzenmann Gmbh Zusammengesetzte Schlauchanordnung und Verfahren zum Herstellen einer solchen
DE202009009809U1 (de) * 2009-07-17 2010-11-25 Schonath, Andreas Aus einem Außenschlauch und einem Innenschlauch bestehender Verbundschlauch
EP2284428B1 (fr) 2009-08-07 2012-07-04 Nexans Conduite et son procédé de fabrication

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3735880A1 (de) * 1987-10-23 1989-05-03 Phoenix Ag Schlauch mit geraeuschmindernder zusatzmasse
US5143122A (en) * 1990-09-11 1992-09-01 Bundy Corporation Composite flexible conduit assembly
US5170011A (en) * 1991-09-25 1992-12-08 Teleflex Incorporated Hose assembly
EP0676575A2 (fr) * 1994-04-08 1995-10-11 Takamasa Hattori Dispositif de raccordement d'un tube à double paroi à un tête d'arrosage
DE19919715A1 (de) * 1999-04-30 2000-11-02 Witzenmann Metallschlauchfab Kältemittelleitung für Klimaanlagen
DE19957567B4 (de) * 1999-11-30 2004-04-08 Rasmussen Gmbh Diffusionsdichte Fluidleitung
DE10126429B4 (de) * 2001-05-31 2004-01-08 Hsi Schlauch- Und Armaturentechnik Gmbh Schlaucheinrichtung zum Transportieren von Fluiden
FR2835306B1 (fr) * 2002-01-31 2004-05-21 Nobel Plastiques Tuyau de transport de fluides automobiles, comportant un tube interieur lisse et un tube exterieur annele
DE10241504A1 (de) 2002-09-07 2004-03-18 S.M.A. Metalltechnik Gmbh & Co. Kg Formschlauch und Verfahren zu dessen Herstellung
DE10244107B4 (de) * 2002-09-11 2004-09-02 Senior Berghöfer GmbH Schlauchleitung und Verfahren zu deren Herstellung
JP2004150606A (ja) * 2002-10-31 2004-05-27 Tokai Rubber Ind Ltd 蛇腹金属管付ホース
JP2004169824A (ja) * 2002-11-20 2004-06-17 Tokai Rubber Ind Ltd 可撓性ホース
DE202004014871U1 (de) * 2004-09-22 2005-05-04 Bächle, Dieter Rohrstrang mit abwechselnd angeordneten glatten Rohrabschnitten und Wellrohrabschnitten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007017103A1 *

Also Published As

Publication number Publication date
WO2007017103A1 (fr) 2007-02-15
DE102005037167A1 (de) 2007-02-08

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