Installation method of heat-insulation structure for refrigerant and multilayered tube for refrigerant
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Solution Overview
Problem
Existing refrigerant hoses face issues with condensation due to the use of environmentally friendly refrigerants like carbon dioxide, which causes condensation when air layers are used for insulation, and metal tubes require complex welding and have transportation limitations.
Innovation Solution
A method involving a heat-insulation structure for refrigerant hoses that uses a flexible hose covered by a heat insulator with nitrogen gas injected between the hose and insulator, sealed with adhesive, and joints for flexibility and ease of installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an air layer is created between the heat insulator and the hose to improve heat insulating effects, then heat insulation performance is improved, but condensation occurs due to water vapor in the air layer
Solution Approach 1:
The patent replaces air with nitrogen gas in the gap between the heat insulator and hose. This parameter change (from air to nitrogen) eliminates water vapor content while maintaining the insulating gas layer, thus preventing condensation while preserving heat insulation performance.
Solution Approach 2:
The patent introduces nitrogen gas, an inert gas without water vapor, into the gap between the heat insulator and hose. This creates an inert atmosphere that prevents condensation formation while maintaining the thermal insulation benefits of the gas layer.
2Object-affected harmful factors
If a metal tube is used instead of a hose to avoid condensation through close contact with heat insulator, then condensation prevention is improved, but installation complexity and welding requirements increase
Solution Approach 1:
The patent uses nitrogen gas as an intermediary substance filled in the gap between the hose and heat insulator. This mediator prevents condensation by displacing moisture-containing air, while allowing the flexible hose to maintain its installation advantages without requiring close contact or welding.
Solution Approach 2:
The patent changes the composition parameter of the gas in the gap from air (containing water vapor) to nitrogen (inert, no water vapor). This parameter change enables the flexible hose to achieve condensation prevention comparable to metal tubes without the installation complexity and welding requirements.
3Ease of operation
If rubber hose is used instead of metal tube to simplify installation, then ease of installation is improved, but rubber deterioration due to condensation occurs
Solution Approach 1:
The patent creates an inert nitrogen atmosphere in the gap between the rubber hose and heat insulator. This prevents condensation from forming on the rubber surface, thereby protecting the rubber from water-related deterioration while maintaining the ease of installation advantages of flexible hoses.
Solution Approach 2:
The patent converts the potential harm of condensation into a benefit by using the gap space (which could allow condensation) and filling it with nitrogen. This transforms the condensation risk into an opportunity to create a protective inert atmosphere that actually protects the rubber hose.
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
Prevents condensation while maintaining heat insulation and simplifies installation by using flexible hoses and adhesives, reducing labor and complexity compared to metal tubes.
Implementation Method 1
a process of injecting nitrogen gas into a gap formed between an outer circumferential surface of the refrigerant hose part and an inner circumferential surface of the heat insulator
Implementation Method 2
a process of attaching a heat insulator to a refrigerant hose part including a refrigerant hose having flexibility so as to tubularly cover the refrigerant hose part
Implementation Method 3
a process of sealing nitrogen gas remaining in the gap by bonding the refrigerant hose part and the heat insulator with a bonding adhesive at both end portions of the heat insulator
Data Source
AI summary
An installation method for a heat-insulation structure for refrigerant prevents the occurrence of condensation in a gaseous body layer while the heat-insulation structure for refrigerant has a heat insulating effect by interposing between the gaseous body layer a heat insulator and a hose. An installation method of a heat-insulation structure for refrigerant pertaining to a pipe for refrigerant includes a process for attaching a heat insulator to a refrigerant hose including a refrigerant hose having flexibility so as to tubularly cover the refrigerant hose. Nitrogen gas is injected into a gap formed between an outer circumferential surface of the refrigerant hose and an inner circumferential surface of the heat insulator. Nitrogen gas remaining in the gap is sealed by bonding the refrigerant hose and the heat insulator with a bonding adhesive at both end portions of the heat insulator.