WO2012109701A1 - Tuyau flexible - Google Patents

Tuyau flexible Download PDF

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Publication number
WO2012109701A1
WO2012109701A1 PCT/AU2012/000139 AU2012000139W WO2012109701A1 WO 2012109701 A1 WO2012109701 A1 WO 2012109701A1 AU 2012000139 W AU2012000139 W AU 2012000139W WO 2012109701 A1 WO2012109701 A1 WO 2012109701A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
flexible hose
flexible
onto
hose according
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.)
Ceased
Application number
PCT/AU2012/000139
Other languages
English (en)
Inventor
Peter Mintzas
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.)
SPARTAFLEX Pty Ltd
Original Assignee
SPARTAFLEX Pty Ltd
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 SPARTAFLEX Pty Ltd filed Critical SPARTAFLEX Pty Ltd
Publication of WO2012109701A1 publication Critical patent/WO2012109701A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
    • 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
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/153—Arrangements for the insulation of pipes or pipe systems for flexible pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • F24F1/34—Protection means thereof, e.g. covers for refrigerant pipes

Definitions

  • This invention relates to flexible hose.
  • the invention has particular application to flexible hose for use in air conditioning fluid transport in fixed structures, particularly in domestic applications and reference will be made to such application.
  • the invention may be found to be useful in other application where fluid transport of similar fluids is desired or required.
  • the term fixed structures is to be taken to encompass domestic, industrial and commercial applications.
  • the term "domestic air conditioning" will be used in this specification, and is to be taken to includes commercial and industrial air conditioning unless the context indicates otherwise.
  • Domestic air conditioning fluid transport is traditionally accomplished with the use of lagged or insulated copper tubing or pipe, normally rigid pipe. Whilst this form of conduit performs well from a technical point of view, copper tubing can be expensive and difficult to install in some locations. Flexible hose is used in some non-domestic air conditioning systems, particularly automotive air conditioning. However, such hose is not suitable for application in domestic air conditioning.
  • the present invention aims to provide flexible hose which alleviates one or more of the aforementioned problems.
  • Other alms and advantages of the invention may become apparent from the following description.
  • the present invention resides broadly in flexible hose including: a core layer having a lumen extending axially therethrough end en outer surface, the core layer being formed from flexible material suitable for contact with, and prevention of permeation radially therethrough of, domestic air conditioning refrigerant fluids; an adhesive layer formed onto the outer surface of the core layer is sufficient coverage to provide an adhesive layer; a protective layer formed onto the adhesive layer, the protective layer being formed from flexible, compressible and heat insulating material and having an outer resilient surface; a reinforcing layer formed from braided material onto the outer resilient surface to provide an outer reinforced surface; and a finishing layer formed onto the outer resilient surface for protecting the reinforcing layer and retaining same in place on the protective layer.
  • the core layer is formed from nylon suited for contact with domestic air conditioning refrigerant such as 1OA, which is a blend of difluoromethane and pentafluoroethane, such as, for example, polya ide 6.
  • 1OA domestic air conditioning refrigerant
  • the core layer is preferably flexible to the extent that the hose may be bent to a tight radius without kinking.
  • the core layer is selected for form a barrier layer against the permeation of of the refrigerant through the wall of the hose.
  • the protective layer is formed from elastomer, such as nitrile rubber.
  • the rubber may be foamed or softened to provide compressibility and stretchabillty so that the hose may be flexed to follow a tight curve.
  • the adhesive layer is formed from material selected for bonding nylon and the material selected for the protective layer, that is, nitrile rubber.
  • the reinforcing layer is formed from cellulosic material, such as rayon, formed in to a braiding, and having a strength sufficient to accommodate the hoop Str ss resulting from the carriage of pressurised fluid.
  • the finishing layer is formed from elastomer, such as nitrile rubber.
  • the protective layer and the finishing layer may be formed from the same material.
  • the materials selected for each layer be tailored to their particular purpose.
  • the finishing layer is the outermost layer as the material selected does not require further protection.
  • a further finishing layer may be applied for colouring or aesthetics if necessary, or a metalizing layer may be applied for enhancing the reflectivity of the hose.
  • Fig. 1 is a partially fragmented perspective view of flexible hose according to the invention.
  • a flexible hose 10 comprises five layers of different materials, each of which fulfils a different purpose.
  • a core layer 11 has a lumen 12 extending axially through the core to form a core wall 13 which is coaxial with the lumen and the remaining layers.
  • the core layer is formed from nylon for prevention of permeation of refrigerant radially through the core wall -
  • An adhesive layer 14 is formed on an outer surface of the core layer to which a protective layer 15 is formed.
  • the protective layer is formed from flexible, compressible and heat insulating material.
  • a reinforcing layer 16 formed from rayon textile is provided in the form of a braid material onto the outer resilient surface of the to provide an outer reinforced surface. In the particular example illustrated / the reinforcing layer is formed from 8-ply rayon to provide burst protection.
  • ⁇ finishing layer 17 formed onto the outer resilient surface of the braided reinforcing layer for protecting the reinforcing layer.
  • flexible hose according to the invention may be installed in domestic air conditioning installations in the place of pipe or tubing according to the prior art, or to replace such prior art tubing. Moreover, domestic air conditioning installations previously found to be difficult or impossible may be successfully installed using flexible hose according to the present invention.
  • a prototype flexible hose according to the invention has been tested in experimental trials. When compared to traditional copper pipe used for domestic air conditioning piping, flexible hose according to the invention has been found to have the following advantages: ⁇ does not kink, thereby substantially eliminating refrigerant flow restrictions
  • flexible hose according to the invention may be compared with traditional copper piping as follows:
  • Copper piping systems have for a long time required the use of specialised tools for the creation of "flaring” to allow the mechanical joining of copper to the compressor units of fridge and air conditioning units.
  • Flexible hose according to the invention does not require any onsite flaring as the material may bezz manufactured to convenient specified lengths and the flare and retaining device is an integral component of the piping system. Flaring copper requires a degree of accuracy that cannot always be guaranteed to not leak refrigerants to the ozone.
  • Copper piping systems for refrigerant gases require expert soldering when joining copper products.
  • Flexible hose according to the invention can be joined in approximately half the time by the incorporation of specialised machined joiners that provide a simple and easy joining method which substantially eliminates leaks.
  • Copper piping as a result of solder joining requires treatment to remove carbonising that occurs on the copper tubing as a result of soldering processes. o Flexible hose according to the invention does not require solder joints and as such does not need to have carbon deposits removed.
  • o flexible hose according to the invention has a working pressure 3,450 kPa (500 psi) and burst pressure 13,790 kPa (2000 pai) and requires no pressure testing when installed to specifications.
  • Copper piping has limitations as to the bends that can be created due to the construction of the product which limits application abilities.
  • o Flexible hose according to the invention has superior flexibility due to the construction of the piping material, thereby enabling much broader installation possibilities. * Copper requires joining to bends and other fittings to turn sharp direction changes increasing cost and labour requirements.
  • o Flexible hose according to the invention is able to be routed through sharp bends without- the need to use bends and joiners and with no kinking.
  • Flexible hose according to the invention is self insulating and retains thermal independence.
  • Insulated copper has an increased outer diameter that consumes space and reduces application abilities.
  • o Flexible hose according to the invention has a smaller outer diameter increasing the scope of applications available.
  • Insulation to copper piping can mask areas of perforation to the refrigerant carrying lines.
  • o Flexible hose according to the invention is readily able to be inspected ensuring safe and easy maintenance.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention concerne un tuyau flexible comprenant : une couche centrale comportant une lumière s'étendant axialement au travers de celle-ci et une surface extérieure, la couche centrale étant formée d'un matériau flexible adapté au contact avec les fluides réfrigérants de climatisation domestique ; une couche adhésive formée sur la surface extérieure de la couche centrale avec une couverture suffisante pour former une couche adhésive ; une couche protectrice formée sur la couche adhésive, la couche protectrice étant constituée d'un matériau flexible, compressible et isolant thermique qui a une surface extérieure résistante ; une couche de renfort formée d'un matériau tressé sur la surface extérieure résistante afin de créer une surface extérieure renforcée ; et une couche de finition formée sur la surface extérieure résistante afin de protéger la surface de renfort et de la maintenir en place sur la couche protectrice.
PCT/AU2012/000139 2011-02-14 2012-02-14 Tuyau flexible Ceased WO2012109701A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2011100191 2011-02-14
AU2011100191A AU2011100191B4 (en) 2011-02-14 2011-02-14 Flexible hose

Publications (1)

Publication Number Publication Date
WO2012109701A1 true WO2012109701A1 (fr) 2012-08-23

Family

ID=43741490

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2012/000139 Ceased WO2012109701A1 (fr) 2011-02-14 2012-02-14 Tuyau flexible

Country Status (2)

Country Link
AU (1) AU2011100191B4 (fr)
WO (1) WO2012109701A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0959285B1 (fr) * 1998-05-23 2002-09-11 Bridgestone Corporation Tuyau composite souple pour le transport de réfrigérant
US6671162B1 (en) * 2001-06-26 2003-12-30 Dana Corporation Hose with conductive fiber
US20040134553A1 (en) * 2002-12-26 2004-07-15 Calsonic Kansei Corporation Flexible hose

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6671762B1 (en) * 1997-12-29 2003-12-30 Stmicroelectronics, Inc. System and method of saving and restoring registers in a data processing system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0959285B1 (fr) * 1998-05-23 2002-09-11 Bridgestone Corporation Tuyau composite souple pour le transport de réfrigérant
US6671162B1 (en) * 2001-06-26 2003-12-30 Dana Corporation Hose with conductive fiber
US20040134553A1 (en) * 2002-12-26 2004-07-15 Calsonic Kansei Corporation Flexible hose

Also Published As

Publication number Publication date
AU2011100191A4 (en) 2011-03-17
AU2011100191B4 (en) 2011-10-20

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