Inner pipe for liquid heating apparatus, and liquid heating apparatus and manufacturing 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, instability, and loss of sealing effect, posing safety risks and affecting performance.
Innovation Solution
A liquid heating apparatus with an inner pipe made of metal or alloy featuring a spiral diversion structure machined through rolling or pressing, integrated with an outer pipe, enhancing high temperature and pressure resistance and ensuring safety, while using stainless steel materials for durability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plastic or rubber materials are used for the liquid flow path and sealing ring, 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, deformation, and loss of sealing effect in high temperature environments, causing safety risks
Solution Approach 1:
The patent changes the material parameter from plastic/rubber to metal, fundamentally altering the thermal and mechanical properties to withstand high temperature environments without aging or deformation, thereby maintaining sealing effect and eliminating safety risks
Solution Approach 2:
The patent employs metal composite structures (inner pipe with spiral diversion structure made of metal or alloy) that combine different metal properties to achieve both sealing capability and high temperature resistance, avoiding the limitations of single-material plastic or rubber components
2Reliability
If plastic or rubber materials are used for the liquid flow path, then the gap between the liquid flow path and external heat pipe can be made small to improve heating performance, but the materials produce peculiar smell and may generate substances harmful to human health when exposed to high temperature water
Solution Approach 1:
The patent changes the material composition parameter from organic plastic/rubber to inorganic metal, eliminating the chemical reactions that produce peculiar smells and harmful substances when exposed to high temperature water, while maintaining the structural integrity needed for heating performance
3Reliability
If a diversion mechanism is added on the inner pipe to define the liquid flow path, then heating performance is improved, but the mechanism shakes and becomes unstable during long-term high temperature heating, resulting in falling off and blocking the flow path
Solution Approach 1:
The patent merges the diversion mechanism with the inner pipe by machining the spiral diversion structure directly onto the pipe body, creating an integrated structure that eliminates relative motion and prevents falling off, while maintaining the flow path definition needed for heating performance
Solution Approach 2:
The patent segments the pipe wall to create the spiral diversion structure, forming distinct flow channels within the continuous pipe body, which maintains structural integrity while defining the liquid flow path for effective heating
4Reliability
If the sealing ring is used to seal the liquid flow path, then liquid flow is controlled, but the sealing ring is prone to aging and deformation in high temperature environments, losing sealing effect and allowing liquid to flow to the heating thick film circuit
Solution Approach 1:
The patent changes the sealing material parameter from rubber to metal, fundamentally improving the service life in high temperature environments by eliminating thermal aging and deformation, ensuring long-term sealing effect and preventing liquid leakage to the heating circuit
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 provides a stable and safe liquid heating apparatus with improved high temperature and pressure resistance, reduced manufacturing costs, and enhanced performance, avoiding issues like material aging and instability, and ensuring continuous and efficient liquid flow.
Implementation Method 1
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
Implementation Method 2
An outer wall of the external heating pipe is printed with a thick film circuit. when the thick film circuit is energized to heat, liquid passing through the liquid flow path of the inner pipe is heated
Data Source
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. 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; a heating assembly is disposed on the outer peripheral wall of the outer pipe.