Rubber hose of air conditioning system with novel refrigerant carbon dioxide

A technology for carbon dioxide, air conditioning systems, applied in the direction of hoses, pipes, pipes/fittings/fittings, etc., can solve problems such as low penetration

Inactive Publication Date: 2010-05-12
TIANJIN PENGYI GRP CO LTD
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High burst pressure, according to the pressure requirements of the air-conditioning system compressor, the working pressure is 14MPa, and the burst pressure of the rubber hose must exceed 44MPa.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] To produce an air conditioner rubber hose with an inner diameter of 8±0.4mm×19.3±0.5mm, the steps are as follows:

[0033] 1. Rubber mixing: Prepare middle layer rubber (CIIR), adhesive layer rubber (EPDM) and outer layer rubber (EPDM) respectively.

[0034] 2. Extrusion

[0035] ①Single-screw nylon T-type extruder with a mandrel to extrude the inner permeable layer, the diameter of the mandrel is 7.8±0.1mm, and the wall thickness is 0.15±0.05mm.

[0036] ②Single-screw T-type extruder extrudes the middle rubber layer with a thickness of 1.5±0.2mm;

[0037] ③ Braided inner reinforcement layer, using DuPont's 1670D dipped aramid yarn, 3-strand braid, stroke 25±5mm;

[0038] ④Single-screw T-type extruder extrudes the adhesive layer with a thickness of 0.6±0.1mmm;

[0039] ⑤ Braided outer reinforcement layer, using DuPont's 1670D dipped aramid yarn, 3-strand braid, stroke 25±5mm;

[0040] ⑥Single-screw T-type extruder extrudes the outer rubber layer with a thickness of ...

Embodiment 2

[0046] To produce an air-conditioning rubber hose with an inner diameter of 13±0.4mm×25.9±0.5mm, the steps are as follows:

[0047] 1. Rubber mixing: Prepare middle layer rubber (CIIR), adhesive layer rubber (EPDM) and outer layer rubber (EPDM) respectively.

[0048] 2. Extrusion

[0049] ①Single-screw nylon T-type extruder with a mandrel to extrude the inner permeable layer, the diameter of the mandrel is 12.8±0.1mm, and the wall thickness is 0.15±0.05mm.

[0050] ②Single-screw T-type extruder extrudes the middle rubber layer with a thickness of 2.1±0.3mm;

[0051] ③ Braided inner reinforcement layer, using 1670D dipped aramid yarn, 4-strand braid, stroke 35±5mm;

[0052] ④Single-screw T-type extruder extrudes the adhesive layer with a thickness of 0.6±0.1mmm;

[0053] ⑤ Braided outer reinforcement layer, using DuPont's 1670D dipped aramid yarn, 4 strands braided, stroke 35±5mm;

[0054] ⑥Single-screw T-type extruder extrudes the outer rubber layer with a thickness of 2.0...

Embodiment 3

[0060] To produce an air conditioner rubber hose with an inner diameter of 19±0.4mm×32.5±0.5mm, the steps are as follows:

[0061] 1. Rubber mixing: Prepare middle layer rubber (CIIR), adhesive layer rubber (EPDM) and outer layer rubber (EPDM) respectively.

[0062] 2. Extrusion

[0063]①Single-screw nylon T-type extruder with a mandrel to extrude the inner permeable layer, the diameter of the mandrel is 18.6±0.1mm, and the wall thickness is 0.15±0.05mm.

[0064] ②Single-screw T-type extruder extrudes the middle rubber layer with a thickness of 2.0±0.3mm;

[0065] ③ Braided inner reinforcement layer, using DuPont's 1670D dipped aramid yarn, 4-strand braid, stroke 48±5mm;

[0066] ④Single-screw T-type extruder extrudes the adhesive layer with a thickness of 0.6±0.1mmm;

[0067] ⑤ Braided outer reinforcement layer, using DuPont's 1670D dipped aramid yarn, 4-strand braid, stroke 48±5mm;

[0068] ⑥Single-screw T-type extruder extrudes the outer rubber layer with a thickness of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Burst pressureaaaaaaaaaa
Login to view more

Abstract

The invention relates to a rubber hose of an air conditioning system with novel refrigerant carbon dioxide. The low-infiltration rubber hose of an air conditioner sequentially comprises the following seven layers from inside to outside: an internal infiltration layer nylon PA11, a middle rubber layer CIIR rubber, an internal reinforced layer dipping aramid cord, a bonding layer EPDM rubber, an external reinforced layer dipping aramid cord, a external rubber layer EPDM rubber and an external plastic-covered layer TPX. The internal infiltration layer plays a role of blocking the refrigerant from infiltrating to outside, the middle rubber layer has good heat resistance and air-tightness and can be bonded firmly to the infiltration layer so as to further stop the dispersion of the refrigerant; the two reinforced layers are bonded firmly to the bonding layer so as to increase the pressure resistance of the rubber hose; the external rubber layer has good heat resistance, ozone resistance and weatherability; and the external plastic-covered layer protects the smoothness and levelness of the appearance of the rubber hose. Due to different materials of the internal infiltration layer and the fiber reinforced layer and the different selected structure, the infiltration resistance of the rubber hose is improved by 4 times, and the bursting pressure is improved by 2.5 times.

Description

technical field [0001] The invention relates to the technical field of rubber hoses, in particular to rubber hoses for novel refrigerant carbon dioxide air-conditioning systems. Background technique [0002] European environmental protection regulations stipulate that after 2008, automobile manufacturers will be equipped with low-emission air-conditioning systems to reduce current hydrofluorocarbon emissions by 90%. Tetrafluoroethane (R134a) has been used in automobile air-conditioning systems. However, now we are facing new changes. European legislation stipulates that by 2011, cars will be equipped with carbon dioxide (CO2) 2 ) Refrigerant air conditioning system. Use CO 2 Refrigerants that reduce hydrofluorocarbon emissions by 99% and make air conditioning systems more efficient. in CO 2 Refrigerant air conditioning systems, changes in conditions and CO 2 The sharp decrease in density will cause explosive decomposition, thereby destroying the polymer material, requi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F16L11/08
Inventor 张洪起王学荣
Owner TIANJIN PENGYI GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap