Baby Bottle Warmer Timing via Water Temperature Difference
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Solution Overview
Problem
Current baby bottle warmers lack accurate temperature control and estimation methods for heating milk to a pre-set temperature, often resulting in uneven heating and potential nutrition damage due to prolonged exposure to high temperatures.
Innovation Solution
A heating device with a chamber, heating unit, temperature measuring element, and calculation unit that measures fluid temperature at two points, compares the difference to a predefined temperature, and estimates the arrival time for a pre-set food temperature, allowing for precise temperature control and notification to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If microwave heating is used, then heating speed is improved, but temperature uniformity deteriorates causing nutrition damage
Solution Approach 1:
The patent introduces water as an intermediary heating medium. Instead of directly heating the milk with microwaves, the microwave heater heats the water in the chamber, and the water then uniformly transfers heat to the milk container through conduction and convection, achieving both fast heating and temperature uniformity
Solution Approach 2:
The heating system is segmented into two independent components: a microwave heater for rapid water heating and a water chamber for uniform heat distribution. This separation allows each component to optimize its function without compromising the other
2Productivity
If steam heating is used, then heating efficiency is improved, but temperature distribution deteriorates causing hot spots
Solution Approach 1:
Water serves as an intermediary medium that receives heat from the microwave heater and uniformly distributes it to the milk container. This liquid intermediary prevents direct steam contact that causes uneven heating, while maintaining high heating efficiency through the water's high specific heat capacity and convective properties
3Stability of the object's composition
If au bain-marie heating is used, then temperature uniformity is improved, but heating time increases requiring trial and error
Solution Approach 1:
The patent replaces the traditional thermal conduction-based au bain-marie heating with microwave radiation heating of the water medium. The microwave energy rapidly heats the water molecules, which then transfer heat uniformly to the milk container, maintaining temperature uniformity while reducing heating time from minutes to seconds
Solution Approach 2:
The microwave heater operates in controlled periodic cycles, delivering bursts of microwave energy to the water medium. This periodic heating allows precise control of the heating process, eliminating the need for trial and error while maintaining uniform temperature distribution
4Difficulty of detecting and measuring
If temperature indicators are used, then temperature monitoring is improved, but measurement accuracy deteriorates and readability is poor
Solution Approach 1:
The patent replaces mechanical/optical temperature indicators with an electronic temperature sensor that directly measures the water temperature. This electronic sensing system provides accurate, real-time temperature data that is processed by a controller to determine when the milk reaches the target temperature, eliminating the inaccuracies and readability issues of visual indicators
5Loss of information
If direct milk temperature measurement is attempted, then temperature information is improved, but system complexity and contamination risk increase
Solution Approach 1:
The patent uses water as an intermediary medium for temperature measurement. The temperature sensor measures the water temperature instead of directly contacting the milk, providing accurate temperature information while preventing milk contamination and simplifying the system design. The water-milk heat transfer physics allows accurate inference of milk temperature from water temperature
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 accurate estimation of when the milk has reached the desired temperature, preventing over-heating and ensuring the milk is ready for consumption without direct contact, thus maintaining nutritional integrity.
Implementation Method 1
a heating unit (20) for heating the fluid (18) in the chamber (16)
Implementation Method 2
a temperature measuring element (22) for measuring a temperature of the fluid (18) at a first time point (t) and a second time point (t+Δt0)
Implementation Method 3
a calculation unit (24) for determining a temperature difference of the fluid (18) between the first time point (t) and a second time point (t+Δt0)
Data Source
Figure 1
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AI summary
The present invention relates to a heating device (10) for heating food (12) in a container (14), in particular milk in a baby bottle, comprising a chamber (16) configured to contain a fluid (18) and to receive the container (14), a heating unit (20) for heating the fluid (18) in the chamber (16), a temperature measuring element (22) for measuring a temperature of the fluid (18) over a time range, a calculation unit (24) for determining, for each time point of the time range being a first time point, a temperature difference of the fluid (18) between the first time point and a corresponding second time point of the time range different from the first time point, the calculation unit (24) being configured to compare the determined temperature difference to a predefined amount of temperature, and an estimation unit (26) for estimating an arrival time point, at which a pre-set temperature for the food (12) contained in the container (14) is reached, based on the comparison result of the calculation unit (24).