Inner tube for liquid heating device, and liquid heating device and producing method therefor
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Solution Overview
Problem
Existing liquid heating apparatuses face issues with high temperature and pressure resistance, material safety, and stability due to the use of plastic and rubber materials, which can lead to odor production, aging, and instability of the diversion mechanism, resulting in reduced performance and safety concerns.
Innovation Solution
A liquid heating apparatus with an inner pipe made of metal or alloy material featuring a spiral diversion structure machined or pressed onto its surface, integrated with an outer pipe, enhancing high temperature and pressure resistance and ensuring safety through a stable liquid flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If plastic or rubber materials are used for the diversion mechanism, then the gap between the liquid flow path and external heat pipe can be reduced to improve heating performance, but the materials are prone to aging, odor production, and instability at high temperatures (300°C)
Solution Approach 1:
The patent changes the material parameter from plastic/rubber to metal, which can withstand high temperatures (300°C) without aging or deforming. This material substitution resolves the contradiction by maintaining structural stability while enabling effective heat transfer, as the metal diversion mechanism does not suffer from the thermal degradation issues that plague polymer materials.
Solution Approach 2:
The patent employs a composite structure where the diversion mechanism is made of metal material that integrates both the structural support function and the thermal conduction function. This composite approach eliminates the need for separate sealing rings and diversion components, creating a unified structure that maintains reliability at high temperatures while achieving good heating performance through proper gap control.
2Reliability
If sealing rings are used to seal the liquid flow path, then liquid leakage can be prevented, but the sealing rings are prone to aging, deformation, and loss of sealing effect in high temperature environments
Solution Approach 1:
The patent merges the sealing function into the metal diversion mechanism itself, eliminating the separate sealing ring component. The metal structure provides both mechanical support and sealing through its inherent properties, combining multiple functions into a single durable component that does not suffer from the aging and deformation issues of polymer sealing rings.
Solution Approach 2:
The patent extracts the sealing function from the separate sealing ring and integrates it into the metal diversion mechanism. This extraction eliminates the vulnerable polymer sealing ring while maintaining the sealing effect through the metal structure's inherent properties, thereby extending the service life in high temperature environments.
3Ease of manufacture
If the diversion mechanism is manufactured separately and fixed to the inner pipe, then assembly is simplified, but long-term high temperature heating causes the mechanism to shake and become unstable, resulting in falling off or blocking the flow path
Solution Approach 1:
The patent merges the diversion mechanism and the inner pipe into a single integrated metal structure, eliminating the need for separate manufacturing and assembly. This integration ensures that the diversion mechanism cannot detach or become unstable during high temperature operation, as it is structurally unified with the pipe itself while maintaining manufacturing feasibility through forming processes.
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 solution improves the stability and safety of the liquid heating apparatus by eliminating the issues associated with plastic and rubber materials, reducing manufacturing costs, and ensuring continuous and efficient heating performance in high temperature and pressure environments.
Implementation Method 1
a spiral diversion structure which is formed by machining on the inner pipe body along the axial direction of the pipe body
Implementation Method 2
an outer pipe with a heating assembly, wherein a spiral diversion structure which is formed by machining on the inner pipe body
Data Source
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AI summary
The present invention discloses an inner pipe for a liquid heating apparatus, including a hollow pipe body made of a metal or an alloy, where a pipe wall thickness of the pipe body is 0.3-1.0 mm; through a machining method of rolling or pressing, a spiral diversion structure is machined on an inner peripheral wall of the pipe body along an axial direction of the pipe body, so that the spiral division structure is formed to extend along the axial direction of the pipe body, protrude on an outer peripheral wall of the pipe body, and be sunken on the inner peripheral wall. The present invention further discloses a liquid heating apparatus and a manufacturing method therefor. The liquid heating apparatus includes the inner pipe and the outer pipe, where an inner peripheral wall of the outer pipe is spaced apart from a highest point of the spiral diversion structure by a predetermined radical clearance, so that the outer pipe is sleeved at an outer part of the spiral diversion structure; a heating assembly is disposed on the outer peripheral wall of the outer pipe; the inner pipe, the outer pipe, and the spiral diversion structure form a flow path; and openings at two ends of the flow path are sealed by the expanded ports.