EP1910725A1 - Kältemittelleitung - Google Patents
KältemittelleitungInfo
- Publication number
- EP1910725A1 EP1910725A1 EP06776410A EP06776410A EP1910725A1 EP 1910725 A1 EP1910725 A1 EP 1910725A1 EP 06776410 A EP06776410 A EP 06776410A EP 06776410 A EP06776410 A EP 06776410A EP 1910725 A1 EP1910725 A1 EP 1910725A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- refrigerant pipe
- metal hose
- pipe according
- inner liner
- wall thickness
- 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- Withdrawn
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
Definitions
- the invention relates to a refrigerant line for use in air conditioning in particular of motor vehicles with a corrugated metal hose with radially outlying wave crests and radially inner wave troughs.
- a generic refrigerant line is known, for example, from EP-A 1 048 881, where the refrigerant line consists of a metal tube with a radially compressive flexible metal jacket surrounding it as an axial support, and a space filling the space between the metal tube and the jacket Intermediate layer made of pressure-resistant plastic.
- the metal tube is optimized in terms of pulsation strength on the one hand and mobility on the other hand, that he has a greater wall thickness, at least in some areas of its peaks as at least in some areas of its troughs.
- the wall thickness of the wave peaks just lower than the wall thickness of the troughs
- a metal hose with opposite wall thickness ratios is proposed
- the thinner wall thickness of the troughs continues to provide mobility in particular in the various bending directions, while the thicker wave crests, which are primarily claimed in the occurrence of the internal pressure pulsation, are more stable and thereby not only reduce the adverse length change effects, but also prevents fatigue of the metal hose in - otherwise very heavily used - area of the wave crests.
- the metal hose of the refrigerant pipe according to the invention has a wall thickness in the range between 0.17 and 0.25 mm at least in subregions of its wave crests and at least in partial areas of its wave troughs a wall thickness in the range between 0.10 and 0.18 mm.
- the metal hose is suitably ring corrugated and made of austenitic or ferritic steel or aluminum or Inconel or aluminum alloys.
- the metal hose Due to the inventive design of the wall thicknesses, it is possible for the metal hose to withstand pressures of up to 180 bar or pressure pulsation forces of between 5 and 180 bar, which can occur within the shortest time periods, for example within a quarter of a second. At these pressures, the metal hose according to the invention nevertheless has a permeation density of less than 1 g / year due to its material in order to be usable for CO 2 feeds.
- the metal tube has a mobility in the three spatial axes of the order of +/- 15 mm over its axial length.
- the metal tube it is expedient if this has a ratio of outer diameter of the wave crests to inner diameter of the troughs of greater than 1, 3 and in particular greater than 1, 4 and beyond a wavelength of less than 3 mm, preferably between 1, 5 and 2.5 mm, wherein the waves are advantageously formed ⁇ -shaped in order to obtain the largest possible number of waves per length and thus to achieve the highest possible flexibility.
- the inner liner is preferably made of PTFE or a PTFE composite material and has at least in some areas a wall thickness (S a ) in the range of between 0.1 and 1, 0 mm and in particular between 0.4 and 0.6 mm.
- the inner liner is radially spaced from the radially outer wave crests of the metal tube, so that between the inner liner and the wave crests spaced from him buffer areas for the at pressure peaks of any pressure pulsations of the refrigerant radially outwardly expanding inner liner are provided.
- the refrigerant pipe is on the one hand in their mobility not or not significantly limited, so sufficiently flexible;
- the metal hose with the inner liner and the buffer areas arranged between them ensure very good pressure pulsation damping.
- the metal hose of the refrigerant pipe with further line components also on the radial outside, that is, for example, with an axial support in the form of a braided hose or with another also made of plastic sheathing.
- FIG. 1 shows an exemplary cross section of a metal hose for the refrigerant pipe according to the invention in Figure 1.
- a line section of a metal tube 1 is shown schematically in axial section with radially outermost wave crests 2 and radially inwardly lying wave crests 3.
- the wall thickness S of the metal tube is marked in the region of the wave crests with S 3 , while the wall thickness in the area of the wave valleys with S 1 is marked.
- the wall thickness in the region of the wave crests is greater than the wall thickness in the region of the wave troughs, that is to say S 3 > Sj.
- the wavelength l_ w of the metal tube is indicated in the drawing, namely the distance between two axially adjacent same points, thus for example between two rising wave flanks, two wave crests etc.
- This wavelength is expediently less than 3 mm and preferably between 1 , 5 and 2.5 mm, in the case of DN6 2.0 mm and in DN8 2.2 mm.
- a refrigerant line is provided by the present invention, which combines the conflicting requirements in terms of mobility on the one hand and Druckpulsationsfestmaschine on the other hand in an advantageous manner by the metal hose of the air conditioning line is provided with different wall thicknesses, namely with a larger wall thickness in the wave crests than in the area of troughs.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Pipe Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510037165 DE102005037165A1 (de) | 2005-08-06 | 2005-08-06 | Kältemittelleitung |
PCT/EP2006/007351 WO2007017106A1 (de) | 2005-08-06 | 2006-07-26 | Kältemittelleitung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1910725A1 true EP1910725A1 (de) | 2008-04-16 |
Family
ID=37075697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06776410A Withdrawn EP1910725A1 (de) | 2005-08-06 | 2006-07-26 | Kältemittelleitung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1910725A1 (de) |
DE (1) | DE102005037165A1 (de) |
WO (1) | WO2007017106A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007033907A1 (de) | 2007-07-20 | 2009-01-22 | Uhde High Pressure Technologies Gmbh | Naturstoffextraktion |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE479942C (de) * | 1929-07-25 | Meyer Keller & Cie O | Biegsame Leitung mit die Bruchsicherheit erhoehenden Verstaerkungen | |
DE528412C (de) * | 1931-06-29 | Berlin Karlsruher Ind Werke A | Nahtloser metallischer Faltenbalg fuer hoehere Druecke | |
US979460A (en) * | 1909-05-05 | 1910-12-27 | Weston M Fulton | Flexible corrugated-metal wall for collapsible and expansible vessels. |
US2187347A (en) * | 1938-01-04 | 1940-01-16 | Packless Metal Products Corp | Flexible metallic hose |
DE1772307U (de) * | 1958-05-28 | 1958-08-14 | Pforzheim Metallschlauch | Wellrohr mit aussenmantel. |
DE1804160U (de) * | 1959-10-17 | 1960-01-14 | Kloeckner Humboldt Deutz Ag | Faltenbalg. |
US3313319A (en) * | 1964-08-25 | 1967-04-11 | Dayco Corp | Flexible hose |
GB1083099A (en) * | 1964-12-11 | 1967-09-13 | Pforzheim Metallschlauch | High pressure hose in the form of a reinforced corrugated tube with a coiled undulation |
JP2750459B2 (ja) * | 1989-10-03 | 1998-05-13 | 臼井国際産業株式会社 | 蛇腹管 |
US5143122A (en) * | 1990-09-11 | 1992-09-01 | Bundy Corporation | Composite flexible conduit assembly |
US5492151A (en) * | 1993-09-10 | 1996-02-20 | Dayco Products, Inc. | Vacuum cleaner hose and method and apparatus for making the same |
DE19908012C2 (de) * | 1999-02-25 | 2001-08-02 | Stenflex Rudolf Stender Gmbh | Einrichtung zum Ausgleich der Bewegung zweier druckdicht zu verbindender Rohre |
JP2002005348A (ja) * | 2000-06-22 | 2002-01-09 | Fujikura Ltd | 波付き電線管 |
JP3682213B2 (ja) * | 2000-08-25 | 2005-08-10 | 小島プレス工業株式会社 | 蛇腹付ダクトの製造方法並びにそのためのブロー成形用金型 |
AU2003261920A1 (en) * | 2002-09-06 | 2004-03-29 | Ork Corporation | Metal bellows tube, method of producing the same, and flexible tube for high-pressure fluid |
DE10241504A1 (de) * | 2002-09-07 | 2004-03-18 | S.M.A. Metalltechnik Gmbh & Co. Kg | Formschlauch und Verfahren zu dessen Herstellung |
-
2005
- 2005-08-06 DE DE200510037165 patent/DE102005037165A1/de not_active Withdrawn
-
2006
- 2006-07-26 WO PCT/EP2006/007351 patent/WO2007017106A1/de active Application Filing
- 2006-07-26 EP EP06776410A patent/EP1910725A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2007017106A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007017106A1 (de) | 2007-02-15 |
DE102005037165A1 (de) | 2007-02-15 |
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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: 20071205 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BANTSCHEFF, RICHARD Inventor name: NOLTENIUS, CARSTEN Inventor name: PFAFF, THOMAS Inventor name: BURKHARDT, CARLO Inventor name: KARL, REINER Inventor name: ROESLER, RENE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20110201 |