Heated Shaving Razor with Phase Change Thermal Management
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Solution Overview
Problem
Existing wet-shave razors fail to consistently provide a comfortable warmth to the skin during shaving, as previous methods for heating razors are inefficient or uncomfortable.
Innovation Solution
Incorporating a heating element within the handle of the razor, powered externally, which delivers heat to the cartridge through a fluid passageway, using a phase change material and a meltable material to maintain warmth, and providing a mechanism to indicate when the razor has reached a predetermined temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating element is incorporated within the handle powered externally, then consistent warmth is provided during shaving, but device complexity increases
Solution Approach 1:
The patent uses water as an intermediary heat transfer medium. The heating element heats water circulating through channels in the handle, and this warmed water then transfers heat to the cartridge and blade assembly. This intermediary approach allows distributed heating without directly heating all components, simplifying the overall thermal management while maintaining consistent warmth.
Solution Approach 2:
The system uses the razor's own water reservoir and circulating water mechanism to provide heating, rather than requiring an external heating system. The water that is already part of the shaving system serves dual purposes: as a cooling/lubricating fluid and as a heat transfer medium, eliminating the need for separate heating infrastructure.
2Temperature
If phase change material is used for heating, then controlled heat release is achieved, but device complexity increases
Solution Approach 1:
The patent incorporates phase change material within the handle that undergoes phase transition (typically solid to liquid) at a specific temperature, absorbing and releasing heat in the process. This provides passive thermal regulation, maintaining a consistent temperature range during shaving without requiring active control mechanisms.
Solution Approach 2:
The handle is designed as a composite structure combining the phase change material with the housing and fluid channels. This composite approach integrates multiple thermal management functions (heating, insulation, heat distribution) into a single unified component, reducing overall system complexity while achieving controlled heat release.
3Reliability
If external power source is used to heat the handle, then reliable heating is provided, but ease of operation decreases
Solution Approach 1:
The razor utilizes the water already present in its reservoir as the heat transfer medium, eliminating the need for external power sources or complex heating infrastructure. The system heats and circulates its own internal water, providing reliable heating while maintaining simplicity and ease of operation.
Solution Approach 2:
The water in the system serves multiple functions simultaneously: it acts as a lubricant during shaving, a coolant for the blades, and a heat transfer medium for warming the handle and cartridge. This multi-functionality eliminates the need for separate heating systems, improving ease of operation while maintaining reliable heating.
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 ensures a consistent and comfortable warmth during shaving, preventing overheating and providing a controlled release of heat, enhancing the shaving experience.
Implementation Method 1
a heating element within the handle, in electrical communication with the contacts
Implementation Method 2
a phase change material disposed within the handle
Implementation Method 3
Heat is delivered from the handle to the cartridge, for example by a fluid which flows from the handle to the cartridge
Implementation Method 4
The hollow body may be thermally insulative
Data Source
AI summary
Razors and systems for wet shaving are provided. The razors include a heating element and a heating material that may be heated by the heating element. Some systems include a holder for the razor, comprising contacts positioned to engage electrical contacts of the razor and deliver power from a power source to the heating element.