Electromagnetic Fluid Pump Core Protection for Impact and Cost
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid pumps, such as those used in capsule coffee machines, face challenges with the cost and vulnerability of magnetic cores due to their food-grade material requirements and proximity to the plunger, which can lead to damage.
Innovation Solution
A fluid pump design featuring a magnetic core protected by a jacketed material that allows fluid passage, enabling the use of non-food-grade materials for the core while maintaining magnetic permeability, and incorporating a plunger with complementary round shapes for reduced impact and improved magnetic path efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnetic core is made of food-grade material and located adjacent the plunger to maximize magnetic permeability, then the magnetic path efficiency is improved, but the cost increases and the core becomes vulnerable to damage by plunger impact
Solution Approach 1:
The magnetic core is segmented into two distinct parts: a food-grade magnetic core portion that maintains magnetic permeability and reliability, and a non-food-grade protective jacket portion that provides mechanical protection and cost reduction. This segmentation allows each part to be optimized for its specific function without compromising the other.
Solution Approach 2:
The magnetic core uses composite construction by combining food-grade magnetic material with non-food-grade protective material in a single integrated component. The protective jacket is molded around the magnetic core, creating a composite structure that provides both magnetic functionality and mechanical protection, thereby reducing overall cost while maintaining reliability.
2Reliability
If the magnetic core is located too close to the plunger to maximize magnetic permeability, then the magnetic path efficiency is improved, but the core becomes vulnerable to damage by impact
Solution Approach 1:
The protective jacket is molded around the magnetic core beforehand to provide cushioning and protection against plunger impact. This pre-established protective layer absorbs the impact forces during plunger movement, preventing damage to the magnetic core while allowing the core to remain positioned close to the plunger for optimal magnetic permeability.
Solution Approach 2:
The protective jacket acts as a flexible protective shell around the magnetic core. This shell provides mechanical protection against impact from the plunger while allowing the magnetic core to maintain its optimal position for magnetic flux transmission. The jacket material is chosen to provide adequate cushioning without interfering with magnetic field transmission.
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 reduces the cost and vulnerability of the magnetic core while maintaining high magnetic permeability and efficiency, allowing for compact and reliable operation in applications like capsule coffee machines.
Implementation Method 1
an electromagnetic driving unit adapted to cause said movement of the plunger in the housing in opposite directions relative to the chamber
Implementation Method 2
a magnetic core in the housing and located adjacent the plunger for establishing a magnetic path across the driving unit and the plunger
Data Source
AI summary
A fluid pump has a housing, a chamber having an inlet and an outlet, an inlet valve, an outlet valve, and a plunger. The plunger has a plunger tube extending into the chamber and supported for movement, on a suction stroke, to introduce a fluid into the chamber via the inlet, and, on a discharge stroke, to displace the fluid from the chamber via the outlet. An electromagnetic driving unit moves the plunger in two opposite directions. A magnetic core is located adjacent the plunger for establishing a magnetic path across the electromagnetic driving unit and the plunger. The core is located in the path of movement of the plunger on the suction stroke, and is protected or covered by a material against contact with the fluid in the housing.