Personal Care Treatment Unit Cleaning Before UV Sanitizing

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Personal care devices, such as electric shavers, require effective cleaning and sanitization processes that are often overlooked and not adequately addressed by manual user intervention, leading to potential hygiene issues due to debris accumulation and microbial contamination.

Innovation Solution

A personal care system comprising a personal care device, a sanitizing device, and a cleaning device, equipped with a processing unit that provides timely and accurate feedback on the cleanliness of the treatment unit, recommending cleaning before sanitization based on debris levels and usage data, ensuring efficient disinfection through a combination of disinfecting light and cleaning-liquid flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual cleaning and sanitizing processes are used, then users have control over the maintenance routine, but the effectiveness is reduced due to user oversight and insufficient cleaning quality

Engineering Contradiction:
Improvecleaning effectivenessVSAvoiduser intervention requirement
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system enables automatic monitoring of treatment unit cleanliness through sensors that detect debris levels, and automatically triggers notifications to users when cleaning is required, eliminating the need for users to manually track and assess cleaning needs

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system incorporates sensors that continuously monitor the treatment unit condition and provide feedback to users through notifications, creating a closed-loop system that ensures cleaning is performed at the appropriate time based on actual debris levels rather than user estimation

Inventive Principle:
Principle #23Feedback

2Reliability

If users manually decide when to clean and sanitize, then flexibility is maintained, but hygiene effectiveness deteriorates due to subjective decision-making

Engineering Contradiction:
Improvehygiene maintenanceVSAvoidcleanliness status accuracy
Core Design Contradiction:
ReliabilityVSLoss of information

Solution Approach 1:

The system replaces subjective user judgment with objective sensor-based detection that measures actual debris levels on the treatment unit, providing accurate information about when cleaning is truly needed rather than relying on user perception or arbitrary schedules

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

Solution Approach 2:

Continuous monitoring through sensors provides real-time feedback on treatment unit cleanliness, enabling data-driven decisions about when cleaning and sanitizing should occur, replacing subjective user assessment with objective measurements

Inventive Principle:
Principle #23Feedback

3Reliability

If sanitizing is performed without prior cleaning, then the sanitizing process can be completed quickly, but the sanitization effectiveness is compromised due to debris blocking the sanitizing light

Engineering Contradiction:
Improvesanitization effectivenessVSAvoidcleaning-s sanitizing sequence time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The system monitors debris levels and sends notifications to users to clean the treatment unit before attempting sanitization, ensuring that the sanitizing light can effectively reach and disinfect the treatment unit surface without being blocked by accumulated debris

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The sensor system provides feedback on treatment unit cleanliness status, preventing users from attempting sanitization until the treatment unit has been adequately cleaned, thereby ensuring sanitization effectiveness while minimizing unnecessary time loss through proper sequencing

Inventive Principle:
Principle #23Feedback

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 effective cleaning and sanitization of personal care devices by preventing ineffective sanitization due to debris, enhancing user hygiene and maintaining device cleanliness through real-time monitoring and personalized feedback.

Implementation Method 1

sanitizing device, which is configured to disinfect the treatment unit by means of disinfecting light generated by a light source of the sanitizing device

Methodology Applied
Scientific EffectUltraviolet (UV) light disinfection: Radiation

Implementation Method 2

cleaning device, which is configured to clean the treatment unit by means of a cleaning-liquid flow generated by a liquid-displacing member of the cleaning device

Methodology Applied
Scientific EffectFluid flow cleaning: Fluid Spray

Data Source

PatentEP4647221A1Personal care system comprising a sanitizing device and a cleaning device
Publication Date: 2025.11.12 KONINKLIJKE PHILIPS NV
  • EP4647221A1 patent drawingFigure 1
  • EP4647221A1 patent drawingFigure 2
  • EP4647221A1 patent drawingFigure 3

AI summary

The present disclosure relates to a personal care system (100) comprising a personal care device (110), a sanitizing device (120), a cleaning device (130), and a processing unit (140). The personal care device includes a treatment unit (112) for treating a user's body. The sanitizing device disinfects the treatment unit using disinfecting light when the treatment unit is in a predefined sanitizing position. The cleaning device cleans the treatment unit using a cleaning-liquid flow when the treatment unit is in a predefined cleaning position. The processing unit receives a first signal indicating a user action in relation to the sanitizing device, and a second signal indicating a degree of debris on/in the treatment unit and/or usage of the treatment unit since a last cleaning of the treatment unit by the cleaning device. The processing unit then generates an output signal relating to a recommended or required cleaning of the treatment unit by the cleaning device based on the received signals.