Pump Holder Insulation Distance via Asymmetric Wire Hole Spacing
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Solution Overview
Problem
Existing insulation structures for conductive wires in pumps cannot sufficiently secure the insulation distance between power-supplying and control signal conductive wires, leading to safety concerns.
Innovation Solution
A holder with distinctively arranged holes for power and control signal conductive wires, featuring a larger insulating portion between the power wire hole and adjacent control signal wire holes, and using insulating resin to enhance safety and reduce holder size, with a curved creepage path for increased insulation distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conductive wires are arranged in parallel at equal intervals, then the holder size is reduced, but the insulation distance between power wire and control signal wires cannot be sufficiently secured
Solution Approach 1:
The holder structure implements different hole spacing configurations: equal intervals between control signal wire holes, but a larger distance between the power wire hole and adjacent control signal wire holes. This local differentiation ensures sufficient insulation distance where needed while maintaining compact overall dimensions.
Solution Approach 2:
The holder employs asymmetric hole arrangement where the spacing pattern is not uniform throughout. Specifically, the distance between the power wire hole and control signal wire holes is intentionally made larger than the intervals between control signal wire holes, creating an asymmetric configuration that prioritizes insulation safety.
2Reliability
If a larger insulation distance is secured between power wire and control signal wire, then safety is improved, but the holder size increases
Solution Approach 1:
The holder applies differentiated spacing: larger distance only where insulation is critical (between power wire and control signal wires), while maintaining tighter spacing between control signal wires where lower insulation requirements exist. This localized approach optimizes the balance between safety and compactness.
Solution Approach 2:
The holder utilizes three-dimensional space arrangement of holes in parallel, allowing optimization of insulation distance in specific spatial relationships while maintaining overall compact dimensions through vertical or lateral stacking configurations.
3Reliability
If insulating portions are made larger in width, then insulation reliability is improved, but the holder complexity increases
Solution Approach 1:
The holder includes insulating portions with different widths positioned at specific locations: wider insulating portions between power wire and control signal wire holes for enhanced insulation, and narrower insulating portions between control signal wire holes. This localized differentiation achieves reliable insulation without unnecessary structural complexity.
Data Source
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AI summary
A pump (P) includes a holder (6) configured to hold a first conductive wire (20a) for supplying power to a controller (C) for controlling drive of a motor (M) and a plurality of second conductive wires (20b) for sending control signals to the controller (C). The holder (6) includes: a first hole (70b) into which the first conductive wire (20a) is inserted; a plurality of second holes (70a) into which the plurality of second conductive wires (20b) are inserted, the first hole (70b) and second holes (70a) being arranged in parallel; and an insulating portion (75) provided between the first hole (70b) and the second hole (70a) next to the first hole (70b). A distance between the first hole (70b) and the second hole (70a) next to the first hole (70b) is different from a distance between the plurality of second holes (70a).