Pipe for conveying fluids in hvacr systems and composite coating for such a pipe
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Solution Overview
Problem
Existing HVACR pipes face issues with insulation effectiveness due to exposure to weather conditions, material bonding problems leading to loosening, and increased friction during installation, which affects energy efficiency and installation ease.
Innovation Solution
A composite-coated pipe with a tubular insulating cover made of PVC/NBR or EPDM materials and a tubular jacket made of thermoplastic elastomers, where the layers are effectively bonded to prevent loosening and facilitate easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional insulation materials are used for HVACR pipes, then insulation effectiveness is provided, but the insulation becomes damaged over time due to weather conditions, reducing energy savings efficiency
Solution Approach 1:
The patent employs a composite coating structure consisting of an outer jacket layer and an insulating cover layer made from different materials (PVC, NBR, EPDM, thermoplastic elastomers). This composite structure combines the protective properties of the outer jacket (resistance to weather, UV radiation, and mechanical damage) with the insulating properties of the inner cover, creating a synergistic effect that maintains both insulation effectiveness and durability over time.
Solution Approach 2:
The patent specifies precise material composition parameters for the coating layers, including the use of PVC/NBR or EPDM for the insulating cover and thermoplastic elastomers for the outer jacket. These parameter specifications ensure the material properties are optimized for both thermal insulation and weather resistance, preventing degradation that would otherwise reduce energy savings efficiency.
2Ease of manufacture
If insulation material is bonded to external coating without effective binding means, then manufacturing is simplified, but loosening occurs over time compromising insulation effectiveness
Solution Approach 1:
The patent applies different material properties to different layers of the coating, with the outer jacket made of thermoplastic elastomers providing mechanical strength and weather resistance, while the insulating cover is made of PVC/NBR or EPDM for thermal insulation. This local differentiation ensures each layer performs its specific function effectively while maintaining stable bonding between layers.
Solution Approach 2:
The composite coating structure with specifically selected material combinations (PVC/NBR, EPDM, thermoplastic elastomers) creates inherent bonding stability through material compatibility and complementary properties, ensuring the layers remain firmly attached over time without requiring additional binding mechanisms.
3Ease of manufacture
If traditional external coating is used, then manufacturing is straightforward, but friction or stickiness of the outer jacket increases, making installation difficult
Solution Approach 1:
The patent specifies using thermoplastic elastomers for the outer jacket with controlled composition and physical properties. These parameter specifications ensure the outer surface has appropriate friction characteristics that prevent excessive stickiness during installation while maintaining protective functions, thereby improving ease of operation during pipe assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composite coating provides improved insulation, resistance to hydrolysis and UV radiation, and enhanced resistance to bending and abrasion, ensuring better energy efficiency and easier installation while maintaining effective bonding between layers.
Implementation Method 1
the insulation has even the task of energy savings, since it prevents the heat/cool from being dispersed from the inner tube outwards
Implementation Method 2
The composite coating provides improved insulation, resistance to hydrolysis and UV radiation
Implementation Method 3
The composite coating provides improved insulation, resistance to hydrolysis and UV radiation
Data Source
AI summary
A pipe for conveying fluids in Heating Ventilation Air-Conditioning Refrigeration (HVACR) systems includes an inner tube delimiting a passageway for fluid flow and a tubular insulating cover surrounding the inner tube. The tubular insulating cover includes an insulation material. A tubular jacket surrounds and is bonded to an outer surface of the tubular insulating cover, wherein the tubular jacket includes an extruded thermoplastic elastomer directly extruded onto the tubular insulating cover to form a composite structure.