Dual-End Thermal Applicator for Rapid Hot-Cold Skin Switching
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Solution Overview
Problem
Existing cosmetic devices struggle to precisely apply both hot and cold sensations to the skin due to their large size and complex design, which hinders precise application and heat dissipation, and do not allow for alternating temperatures effectively.
Innovation Solution
A device with angled end pieces, each capable of applying specific temperatures (35-48°C for hot and 0-15°C for cold), pivots quickly to alternate between hot and cold applications, using a Peltier-effect module or similar, with sensors to adjust temperature based on skin conditions, and includes a product dispenser for combined effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a Peltier-effect module is used to generate cold for cosmetic application, then cooling effect is achieved, but the device size becomes large and heat dissipation becomes difficult
Solution Approach 1:
The device is divided into two separate end pieces: a first end piece for hot application and a second end piece for cold application. Each end piece can be independently dimensioned and optimized for its specific thermal function, avoiding the need for a large monolithic structure. The segmentation allows the hot and cold functions to be spatially separated while maintaining a compact overall device form factor.
Solution Approach 2:
The patent transitions from a single-plane thermal management approach to a three-dimensional configuration where the first and second end pieces are oriented at an angle of less than or equal to 90° with respect to one another. This angular arrangement in multiple dimensions enables compact packaging while maintaining effective thermal application surfaces for both heating and cooling functions.
2Power
If the device size is increased to accommodate Peltier-effect module, then thermal generation capability is improved, but heat dissipation becomes difficult and hot air diffuses towards application area
Solution Approach 1:
By segmenting the thermal application into separate end pieces, the patent creates dedicated thermal zones that prevent thermal interference between hot and cold regions. The first end piece can be optimized for heat generation with appropriate thermal management, while the second end piece is optimized for cold generation, eliminating the heat diffusion problem that occurs in integrated designs.
Solution Approach 2:
Each end piece is designed with specific local thermal properties suited to its function. The first end piece has thermal characteristics optimized for hot application (35-48°C), while the second end piece has characteristics optimized for cold application (0-15°C). This local optimization ensures efficient thermal performance without compromising heat dissipation or causing unwanted thermal diffusion.
3Adaptability or versatility
If a single application device is used for both hot and cold application, then device versatility is improved, but design complexity increases
Solution Approach 1:
The patent merges the hot and cold application capabilities into a single integrated device by positioning the first and second end pieces in a compact arrangement. The unified device structure allows users to switch between hot and cold modes through simple rotation or movement, achieving versatility without requiring multiple separate devices. The angular orientation of end pieces enables compact integration while maintaining distinct thermal functions.
Solution Approach 2:
The device incorporates a dynamic switching mechanism that allows users to rotate or move the device to switch between the first end piece (hot) and the second end piece (cold). This dynamic repositioning capability provides versatile hot and cold application options while keeping the overall device structure relatively simple, avoiding the complexity of fully automated or mechanically complex switching systems.
4Area of stationary object
If the application surface area is increased to match Peltier module dimensions, then thermal coverage is improved, but precise application of cosmetic product becomes difficult
Solution Approach 1:
The end pieces are designed with optimized surface areas and geometries that balance thermal coverage with precise application capability. Each end piece can be shaped to match the contours of the target area (such as the face), providing focused thermal treatment while maintaining the ability to apply cosmetic products precisely to specific zones. The local optimization of surface area ensures both adequate thermal coverage and application precision.
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
Enables rapid and precise alternation of hot and cold sensations on the skin, enhancing product penetration and skin condition, with adjustable temperature and duration based on skin analysis, facilitating efficient skincare application.
Implementation Method 1
Peltier effect is understood to mean any physical phenomenon of movement of heat in the presence of an electrical current passing through conductive materials of different natures which are linked by junctions, one part of which absorbs heat while the other part releases heat.
Implementation Method 2
The module for generating cold or hot may be, for example, a Peltier-effect module, by way of a heating resistor or by way of any other means capable of generating hot or cold.
Data Source
AI summary
Method (40) for alternately applying hot and cold to an application surface, notably the epidermis of a user, with the aid of a device for alternately applying hot and cold comprising a first end piece and a second end piece.According to the method, a hot temperature of between 35° C. and 48° C. is applied to the application surface by the first end piece for a period of between 2 min and 6 min, the application device is pivoted by at most a quarter turn, for a period of less than or equal to 5 seconds, and a cold temperature of between 0° C. and 15° C. is applied to the application surface by the second end piece for a period of between 2 min and 6 min.