Fluid Circulator Winding Connection Sealing Against Oxidation
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Solution Overview
Problem
Existing fluid circulators face issues with the oxidation and redox problems at the electrical connection between aluminum wire windings and copper power supply terminal pins, leading to degradation and reduced service life.
Innovation Solution
A fluid circulator with aluminum or aluminum alloy windings, protected by a sealing protection element such as over-molding or a plastic cover, ensuring a stable electrical connection by eliminating exposure to oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If aluminum wire is used for electrical windings to reduce weight and cost, then weight and manufacturing cost are improved, but oxidation and redox problems occur at the electrical connection with copper terminals
Solution Approach 1:
The patent introduces an intermediary substance (oxidation prevention compound) at the interface between aluminum wire and copper terminal. This compound forms a protective layer that prevents direct contact between dissimilar metals, eliminating redox reactions while maintaining electrical conductivity. The intermediary resolves the contradiction by allowing aluminum windings to be used without compromising connection reliability.
Solution Approach 2:
The patent applies a disposable or replaceable protective coating (such as antioxidant paste or conformal coating) on the electrical connection area. This coating is inexpensive and can be reapplied if degradation occurs, allowing the system to maintain reliability over time while using cost-effective aluminum windings instead of copper.
2Ease of manufacture
If aluminum wire is used for electrical windings to reduce material cost, then manufacturing cost is improved, but oxidation and redox problems occur at the electrical connection with copper terminals
Solution Approach 1:
The patent introduces an intermediary substance (oxidation prevention compound) at the interface between aluminum wire and copper terminal. This compound forms a protective layer that prevents direct contact between dissimilar metals, eliminating redox reactions while maintaining electrical conductivity. The intermediary resolves the contradiction by allowing aluminum windings to be used without compromising connection reliability.
Solution Approach 2:
The patent changes the chemical parameters of the connection interface by applying antioxidant compounds or modifying the surface properties of the terminal. This parameter change creates a chemically stable environment that prevents oxidation and redox reactions, allowing cost-effective aluminum windings to maintain reliable connections over time.
3Reliability
If electrical connection between aluminum winding and copper terminal is made to ensure good initial contact, then initial electrical conductivity is improved, but redox reactions degrade the contact over time
Solution Approach 1:
The patent applies oxidation prevention compounds or protective coatings to the copper terminal and/or aluminum wire before making the electrical connection. This preliminary action creates a protective barrier that prevents future redox reactions, ensuring that the good initial electrical contact is maintained throughout the entire service life of the circulator.
Solution Approach 2:
The patent introduces protective measures (antioxidant compounds, conformal coatings, or sealed enclosures) beforehand to cushion against the harmful effects of redox reactions. This prior cushioning prevents degradation before it can occur, extending the service life of the electrical connection while maintaining initial contact quality.
4Adaptability or versatility
If aluminum windings are used to operate in aggressive environments, then adaptability to harsh conditions is improved, but oxidation and redox problems worsen in humid and salinity conditions
Solution Approach 1:
The patent creates an inert or chemically stable environment around the electrical connection by applying conformal coatings, sealants, or encapsulation materials. This protective environment isolates the aluminum-copper interface from aggressive external conditions (humidity, salinity), preventing oxidation and redox reactions while allowing the circulator to operate in harsh environments.
Solution Approach 2:
The patent uses composite protective structures combining multiple materials (such as antioxidant paste plus conformal coating, or sealed enclosure with desiccant) to provide comprehensive protection. This composite approach creates a multi-layer defense system that effectively blocks aggressive environmental factors from reaching the electrical connection, enabling reliable operation in humid and salinity conditions.
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 reliable and durable electrical contact, enhancing the circulator's service life and performance in aggressive environments.
Implementation Method 1
said electrical contact between different materials (usually, aluminum and copper) is subject to redox problems, which degrade the electrical contact until it is reduced
Implementation Method 2
said electrical contact between different materials (usually, aluminum and copper) is subject to redox problems
Data Source
AI summary
A related heating or cooling apparatus, namely a fluid circulator (100) for heating or cooling systems comprising: a body pump (1) having an impeller for moving the fluid; an electric motor (2) for rotating the impeller, the electric motor (2) comprising at least one electrical winding (21); at least one terminal (22) of an electrical power supply wiring of the electric motor (2); at least one electrical connection (5) between the terminal (22) and an end of the at least one electrical winding (21). The at least one electrical winding (21) is made of aluminum or alloys thereof, and the fluid circulator is provided with a protection element configured for sealingly enclosing the at least one electrical connection (5).