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Method for producing multilayer tube, tube and air conditioning device with such tube

A technology for air-conditioning equipment and multi-layer pipes is applied in the field of manufacturing pipes especially for conveying coolant in air-conditioning equipment, and can solve the problems of complicated and expensive installation of air-conditioning equipment.

Inactive Publication Date: 2017-10-10
REHAU AG & CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes the installation of air conditioning equipment very cumbersome and expensive

Method used

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  • Method for producing multilayer tube, tube and air conditioning device with such tube
  • Method for producing multilayer tube, tube and air conditioning device with such tube
  • Method for producing multilayer tube, tube and air conditioning device with such tube

Examples

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Embodiment Construction

[0025] figure 1 The tube 1 produced according to the invention is shown in cross section. The tube 1 has a continuous inner layer 2 of stainless steel with a layer thickness s i = 0.2 mm (shown exaggerated). The inner stainless steel layer 2 is constructed full-face, so that it defines the closed inner surface of the tube 1 and forms the innermost layer of the tube 1 finally produced. The inner stainless steel layer 2 is sheathed by a plastic layer 3, which is applied by extrusion and is thus likewise continuous, made of cross-linked polyethylene with a layer thickness s a = 3mm. Inner diameter d of stainless steel inner layer 2 i In this example it is 10mm. This inner diameter simultaneously defines the free-flow cross-section of the tube 1 .

[0026] in accordance with Figure 2a In the method for manufacturing the inner layer 2, the inner layer 2 is made of a continuous stainless steel strip 4 wound into a tubular shape in the axial direction, wherein the edges 5 adjac...

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Abstract

The invention relates to a method for producing a multilayer tube (1), in particular for conveying coolant in an air conditioning system. First, a continuous inner layer ( 2 ) of stainless steel is provided, which has a layer thickness (si) of at most 1 mm. The continuous inner layer ( 2 ) is then coated by extrusion with a plastic layer ( 3 ), the layer thickness (sa) of which is preferably at most 7 mm. The subject of the invention is also a correspondingly produced pipe ( 1 ) and an air-conditioning unit with such a pipe ( 1 ).

Description

technical field [0001] The invention relates to a method for producing pipes for conveying coolant, in particular in air-conditioning systems. Background technique [0002] Coolants commonly used in air conditioning equipment must meet various requirements. On the one hand, they must have a vapor pressure curve which enables the coolant to absorb or release as much heat as possible at the corresponding operating temperature. In addition, the coolant must be health-safe. Finally, the coolant gases which are likely to escape from the air-conditioning system must not have climate-damaging effects, ie the coolant is in particular fluorine-free. The chemical industry has developed corresponding coolants, which have also proven themselves in practice. An example of a coolant that is often used in practice is R-410A. R-410A is a mixture of R-32 (difluoromethane) and R-125 (pentafluoroethane). The coolants currently used in practice at least largely meet the above conditions, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/09B21C37/15B29C47/02F16L58/10F16L9/147B29C48/09B29C48/151
CPCB29C48/15B21C37/09B21C37/154F16L9/147F16L58/1045F16L19/048B29C48/09B29C48/151B29K2023/06B29K2105/24B29K2705/12B29L2023/225F16L58/109F28F1/00
Inventor D·格里贝尔D·赫仁斯派尔格尔A·厄尔施勒格尔K·温特U·斯戴夫V·布约姆
Owner REHAU AG & CO