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R744 high-temperature air conditioner hose and preparation method thereof

A hose and air-conditioning technology, applied in hoses, pipes, mechanical equipment, etc., can solve problems such as leakage, carbon dioxide medium penetration, and failure to meet the low permeability requirements of carbon dioxide refrigerant R744, and achieve good high temperature resistance and high pressure resistance , the effect of meeting the performance requirements of low permeability and high temperature and high pressure resistance

Inactive Publication Date: 2018-11-02
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the barrier layer in the existing air-conditioning hose is only a layer of pure nylon, which cannot meet the low permeability requirements of the carbon dioxide refrigerant R744, and it is very easy to cause the penetration and leakage of the carbon dioxide medium
[0004] At the same time, there are three air-conditioning hoses in the existing automobile air-conditioning system, which are irreplaceable for each other

Method used

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  • R744 high-temperature air conditioner hose and preparation method thereof
  • R744 high-temperature air conditioner hose and preparation method thereof

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preparation example Construction

[0043] According to one aspect of the present invention, a preparation method of R744 high-temperature air-conditioning hose, the preparation method comprises the following steps:

[0044] (a), first refine the compound rubber of the inner and outer rubber layers, and then use the compound rubber to extrude the outer surface of the metal bellows to obtain the inner rubber layer;

[0045] (b), carrying out fiber weaving on the outer surface of the inner rubber layer to obtain a fiber reinforced layer;

[0046] (c), using the compounded rubber refined in step (a) to extrude the outer rubber layer on the outer surface of the fiber reinforced layer to obtain a semi-finished hose;

[0047] (d), wrapping water cloth on the outer layer of the semi-finished hose to carry out vulcanization treatment, untie the cloth after vulcanization, and obtain the R744 high-temperature air-conditioning hose.

[0048] The preparation method of the R744 high-temperature air-conditioning hose provide...

Embodiment 1

[0054] like figure 1 As shown, a R744 high-temperature air-conditioning hose, along the diameter direction of the air-conditioning hose, sequentially includes a metal bellows layer, an inner rubber layer, a fiber-reinforced layer and an outer rubber layer from the inside to the outside;

[0055] The preparation method of the above-mentioned R744 high-temperature air-conditioning hose comprises the following steps:

[0056] (a), first refine the inner and outer rubber layer AEM compound rubber, then pass a metal bellows with an inner diameter of 6.3mm, an outer diameter of 9.8mm, and a wall thickness of 0.15mm through a single-screw T-type extruder; use mixing The glue extrudes the inner rubber layer AEM on the outer surface of the metal bellows, with a thickness of 2.2mm;

[0057] (b), adopt Dupont's 2500dtex dipped aramid thread to carry out fiber weaving on the outer surface of the inner rubber layer, 24 spindles and 4 strands are braided, and the stroke is 30mm to obtain a...

Embodiment 2

[0061] A kind of R744 high-temperature air-conditioning hose, its preparation method comprises the following steps:

[0062] (a), first refine the inner and outer rubber layer AEM compound rubber, then pass a metal bellows with an inner diameter of 6.3mm, an outer diameter of 9.8mm, and a wall thickness of 1.0mm through a single-screw T-type extruder; use mixing The glue extrudes the inner rubber layer AEM on the outer surface of the metal bellows, with a thickness of 2.5mm;

[0063] (b), adopt Dupont's 2500dtex dipped aramid thread to carry out fiber weaving on the outer surface of the inner rubber layer, 24 spindles and 4 strands are braided, and the stroke is 30mm to obtain a fiber reinforced layer;

[0064] (c), using the compounded rubber refined in step (a) to extrude the outer rubber layer AEM on the outer surface of the fiber reinforced layer, with a thickness of 1.8mm, to obtain a semi-finished hose;

[0065] (d) After wrapping the outer layer of the semi-finished ho...

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Abstract

The invention provides an R744 high-temperature air conditioner hose and a preparation method thereof, and relates to the technical field of air conditioner hoses. According the high-temperature air conditioner hose, a metal corrugated pipe is adopted as a barrier layer, and thus a barrier layer made of nylon-type materials is replaced; due to existence of a metal corrugated pipe layer, any leakage of carbon dioxide refrigerant media R744 is avoided in the air conditioner hose; the air conditioner hose further has the high-temperature-resistant effect; and meanwhile, by arranging a thickness-moderate composite structure of the metal corrugated pipe layer, an inner rubber layer, a fiber-reinforced layer and an outer rubber layer, the good compression-resistant and bending-resistant properties of the inner rubber layer, the outer rubber layer and the fiber-reinforced layer are utilized, so that the air conditioner hose further has the characteristics of good high-temperature resistance and high-pressure resistance, and good bending elasticity while having non-permeability.

Description

technical field [0001] The invention relates to the technical field of air-conditioning hoses, in particular to an R744 high-temperature air-conditioning hose and a preparation method thereof. Background technique [0002] Refrigerant is the working medium that completes the refrigeration cycle in the refrigeration process. The refrigerants used in early air conditioners and refrigerators are all halogenated hydrocarbons. However, the discharge of this halogenated hydrocarbon refrigerant will destroy the atmospheric ozone layer, and the degree of destruction of the ozone layer by the refrigerant is represented by an Ozone Depletion Potential (ODP). At the same time, these halogenated hydrocarbons are also one of the causes of global warming, because the discharge of halogenated hydrocarbon refrigerants will cause the greenhouse effect, and then cause global warming. GWP for short). According to the requirements of the fluorine-containing greenhouse gas control regulations ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/00B29D23/18
Inventor 张洪起王学荣薛俊芳
Owner TIANJIN PENGYI GRP CO LTD
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