Heated Changing Pad With Embedded Conductor and No Thermostat
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Solution Overview
Problem
Conventional changing pads for small children are often cold, especially in cool environments, and existing heating solutions are inefficient, complex, and pose safety risks due to the need for thermostats and high energy consumption.
Innovation Solution
An electrically heatable changing pad with a resistance heating conductor embedded between a carrier and cover layer, designed to limit heat emission and eliminate the need for thermostats, using a power supply that converts mains voltage to a low output, ensuring safe and efficient heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional changing pad with plastic covering is used, then hygiene and liquid-tight finish are improved, but the pad becomes very cold and uncomfortable for the child
Solution Approach 1:
The patent combines the plastic cover layer with an integrated heating element and insulation layer to create a multi-functional pad that maintains hygiene while providing warmth. The heating element is embedded within the pad structure, merging heating functionality with the existing cover.
Solution Approach 2:
An insulation layer is introduced as an intermediary between the heating element and the plastic cover, mediating heat transfer to maintain a warm surface temperature while preserving the hygiene properties of the plastic cover.
2Temperature
If electric radiant heaters are used to heat the ambient air, then the changing area becomes warm, but large amounts of energy are consumed and heating takes a long time
Solution Approach 1:
Instead of heating the entire ambient air space, the patent applies heating locally at the pad surface where the child is in direct contact. This localized heating approach consumes significantly less energy while achieving the desired comfort level.
Solution Approach 2:
The pad pre-heats the immediate contact surface before the child arrives, rather than heating the entire room. This preliminary localized heating reduces energy consumption and heating time compared to ambient air heating.
3Temperature
If a thermostat is added to control the heating mat temperature, then temperature limitation is improved, but the device becomes expensive and complex
Solution Approach 1:
The heating element is designed with self-regulating properties where the material characteristics naturally limit the maximum temperature without requiring external thermostats or control circuits. The heating material itself provides the temperature control function.
Solution Approach 2:
The patent uses simple, inexpensive heating materials with inherent temperature limitations rather than expensive thermostat systems. The focus is on using affordable materials that naturally prevent overheating.
4Temperature
If a thermostat circuit is used to limit heating, then temperature control is improved, but susceptibility to faults increases and manufacturing costs rise
Solution Approach 1:
The patent extracts and removes the thermostat and control circuitry from the heating system, relying instead on the inherent properties of the heating material to self-regulate temperature. This eliminates fault-prone electronic components.
Solution Approach 2:
The heating material provides self-regulating temperature control through its material properties, eliminating the need for external monitoring and control systems that are susceptible to faults.
5Temperature
If ambient air heating is used in mobile applications, then heating capability is provided, but the method is unsuitable for mobile use due to energy consumption and time requirements
Solution Approach 1:
The pad provides localized heating that is independent of ambient air temperature, making it suitable for mobile applications where environmental control is not feasible. The heating function works autonomously regardless of location.
Solution Approach 2:
The heating element can be activated periodically or on-demand when needed, rather than requiring continuous ambient heating. This intermittent heating approach is energy-efficient and suitable for mobile use.
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 provides quick and comfortable heating with minimal energy consumption, preventing overheating without complex safety measures, and is designed for simplicity and intrinsic safety.
Implementation Method 1
a heat-generating heating element of the heating device according to the invention is replaced by a resistance heating conductor, e.g. B a resistance heating wire formed
Data Source
AI summary
Changing mat (100) comprises a cushioned layer (102) and an electrically insulated heating device (108) for heating the mat. Preferred Features: The heating device is partially contained in the cushioned layer and is formed by a resistance wire, a heating element or heating foil. The mat comprises a cushion filled with a heat conducting fluid.