Thermosensitive Pump Cover for Water Temperature Monitoring

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Solution Overview

Problem

Surface pumps lack effective temperature-sensitive warnings, leading to potential user injuries from overheated water during maintenance, as existing solutions do not adequately provide for temperature monitoring or liquid flow inspection.

Innovation Solution

A pump design featuring a removable cover with a thermosensitive element that changes color above a certain temperature threshold, allowing users to visually inspect the water channel and receive warnings, while also providing access for filter maintenance, potentially integrated with smartphone alerts and 3D printing for versatile manufacturing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of repair

If a filter cover is provided to access the filter for maintenance, then ease of maintenance is improved, but user safety deteriorates due to risk of burn injuries from overheated water

Engineering Contradiction:
Improvefilter maintenance accessVSAvoidburn injury risk from overheated water
Core Design Contradiction:
Ease of repairVSObject-affected harmful factors

Solution Approach 1:

The patent applies a thermosensitive color-changing element on the filter cover that changes color when exposed to overheated water vapor, providing visual warning to users. This resolves the contradiction by maintaining easy filter access while adding safety warning functionality through color change indication.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The filter cover acts as an intermediary element between the user and the overheated water. By placing the thermosensitive element on the cover, it serves as a mediator that detects harmful temperatures and communicates this information to users through color change, preventing direct exposure to thermal hazards.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If temperature monitoring is added to warn users of overheated water, then user safety is improved, but device complexity increases

Engineering Contradiction:
Improveburn injury preventionVSAvoidtemperature monitoring system
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The thermosensitive color-changing element is a passive, self-service temperature indicator that automatically responds to thermal conditions without requiring external power, control systems, or complex electronics. This resolves the contradiction by providing effective temperature monitoring and safety warning while maintaining simple device architecture.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces complex electronic temperature monitoring and warning systems with a simple thermosensitive color-changing material. This substitution of mechanical/chemical indication for electronic control resolves the contradiction by achieving temperature monitoring functionality with minimal complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Difficulty of detecting and measuring

If the filter cover is made transparent to allow water inspection, then inspection capability is improved, but manufacturing cost and complexity increase

Engineering Contradiction:
Improvewater flow inspectionVSAvoidcover manufacturing
Core Design Contradiction:
Difficulty of detecting and measuringVSEase of manufacture

Solution Approach 1:

The patent applies local quality by making only the specific inspection area of the filter cover transparent while keeping the rest opaque. This allows water flow inspection where needed while maintaining normal manufacturing processes for the majority of the cover, resolving the contradiction between inspection capability and manufacturing simplicity.

Inventive Principle:
Principle #3Local quality

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

Ensures safe operation by visibly indicating unsafe water temperatures, preventing injuries and facilitating maintenance with a user-friendly, cost-effective solution that integrates temperature monitoring and inspection capabilities.

Implementation Method 1

a thermosensitive element arranged with the removable cover and in contact with the water flowing through the water channel... the thermosensitive element is adapted to indicate temperature of water flowing through the water channel by exhibiting a color change

Methodology Applied
Scientific EffectThermochromism: Thermochromism

Data Source

PatentEP4100652B1Garden pump with thermosensitive liner
Publication Date: 2023.12.06 HUSQVARNA AB
  • EP4100652B1 patent drawingFigure 1
  • EP4100652B1 patent drawingFigure 2
  • EP4100652B1 patent drawingFigure 3

AI summary

A pump (100) includes a body (102). The pump (100) includes a water channel (104) adapted to allow flow of water through the pump (100). The pump (100) includes a device (106) arranged with the body (102). The device (106) is in contact with the water in the water channel (104) and is visible from outside the pump (100). The pump (100) is characterized in that the cover (106) is adapted to indicate temperature of water flowing through the water channel (104) by exhibiting a color change. Further, the device (106) is a window adapted to inspect the water flowing through the water channel (104).