Helical Rib Heatable Hose Layout to Prevent Wire Short Circuits
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Solution Overview
Problem
Heatable hoses with flexible walls face issues of short circuits due to the spatial proximity of heating wires, which can lead to condensation-related hygienic and technical problems, and existing designs struggle to maintain uniform heating while ensuring flexibility and preventing material waste.
Innovation Solution
The use of multiple helicoidal reinforcing ribs, each enclosing a single-conductor heating wire, ensures electrical insulation and spatial separation of the wires, allowing for uniform heating and increased flexibility while avoiding short circuits, with optional additional ribs for control or measuring lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If heating wires are arranged in a single helicoidal support bead with high flexibility, then hose flexibility is improved, but spatial proximity of heating wires increases causing short circuit risk
Solution Approach 1:
The single support bead is divided into multiple support beads (first support bead and second support bead), with each containing a separate heating wire. This segmentation spatially separates the heating wires while maintaining hose flexibility through the distributed bead structure.
Solution Approach 2:
The heating wires are arranged in different longitudinal positions along the hose axis, creating separation in the longitudinal dimension. The first heating wire is positioned in the first support bead while the second heating wire is positioned in the second support bead, preventing contact through dimensional distribution.
2Ease of operation
If hose wall is made as thin as possible for flexibility, then hose flexibility and lightweight properties are improved, but uniform heating becomes more difficult to achieve
Solution Approach 1:
Multiple heating wires distributed in different support beads create multiple heat sources along the hose length and circumference. This segmented heating approach ensures uniform temperature distribution across the thin hose wall without requiring excessive wall thickness.
Solution Approach 2:
Multiple heating wires are combined to work simultaneously, creating a distributed heating system that provides uniform thermal distribution across the hose surface, compensating for the thin wall structure.
3Extent of automation
If temperature measurement is performed inside the hose, then temperature control is improved, but measurement accuracy deteriorates due to condensate interference
Solution Approach 1:
The support beads act as intermediary structures that carry heating and measurement wires outside the direct contact zone with condensate-prone internal surfaces. Temperature can be measured through the hose wall or via wires positioned in the support beads, reducing condensate interference while maintaining control capability.
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
This design effectively prevents short circuits, maintains hose flexibility, and allows for efficient heating and potential integration of control systems, optimizing hose characteristics like radial strength and bend radius through material and geometric variations.
Implementation Method 1
The current flowing in this way through the heating wires heats the heating wires, which, in turn, heat the hose and the medium flowing therein
Data Source
AI summary
A heatable hose (1), in particular a respiration hose, having a flexible hose wall (4), shall guarantee through its design that a contact of the electric conductors or heating wires (14, 16) accommodated in the hose (1) and, thus, a short circuit, is excluded. For this purpose, the hose (1) is equipped with a plurality of reinforcing ribs (8, 12, 20, 22), each of which winds around the hose wall (4) in the manner of a helical line and which form together a multiple-threaded helical line, at least two reinforcing ribs (8, 12) being provided, each of which encloses a heating wire (14, 16) designed for heating the hose. Each heating wire (14, 16) is preferably a single-conductor wire.