Semi-automatic tea maker
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Solution Overview
Problem
Existing semi-automatic tea makers lack features to handle user delays in responding to temperature alerts, risk overheating or underheating, and do not prevent overfilling or underfilling, which can lead to inefficient brewing and safety issues.
Innovation Solution
A tea maker with a controller that maintains water at a set temperature for a waiting period after alerting the user, includes sensors to detect tea filter insertion and water levels, and adjusts heating based on specific heat capacity and dissipative power to prevent overfilling or underfilling, and optionally heats water briefly to boiling before steeping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the tea maker stops heating immediately after alerting the user, then energy consumption is reduced, but the water temperature may drop too low for proper brewing if the user is slow to respond
Solution Approach 1:
The system dynamically adjusts the heating state based on user response timing. After the initial heating phase completes and the alert is shown, the system transitions to a maintenance mode where it temporarily sustains the brewing temperature even though the user hasn't responded yet. This dynamic state change allows the system to balance energy savings with temperature reliability - stopping heating eventually to save energy, but maintaining it temporarily to ensure the user can still brew properly if delayed.
2Reliability
If the tea maker indefinitely continues to heat the water after alerting the user, then brewing temperature reliability is maintained, but energy consumption increases continuously even if the user forgets to brew
Solution Approach 1:
The system applies partial heating action rather than continuous or complete heating. After the alert is displayed, instead of completely stopping heating (which would risk temperature drop) or indefinitely continuing it (which wastes energy), the system provides a limited, partial continuation of heating for a predetermined time period. This partial action is sufficient to maintain temperature reliability for responsive users but automatically stops to prevent excessive energy consumption from forgotten brewing sessions.
3Ease of operation
If the waiting period for user response is too long, then user convenience is improved, but the risk of forgotten brewing and energy waste increases
Solution Approach 1:
The system uses parameter changes, specifically adjusting the waiting period duration as a controllable parameter. By setting an optimal predetermined time period that balances user convenience with energy efficiency, the system allows sufficient time for users to respond without being too short to cause anxiety or premature termination. This parameter optimization ensures the waiting period is long enough to be convenient but short enough to prevent excessive energy waste from forgotten brewing.
4Loss of energy
If the waiting period for user response is too short, then energy consumption is reduced, but user convenience deteriorates as users cannot resume brewing after temporary interruptions
Solution Approach 1:
The system performs preliminary action by maintaining the brewing temperature in advance during the waiting period before the user actually inserts the tea filter. By proactively sustaining the temperature rather than allowing it to drop and then reheating, the system prepares the optimal brewing condition ahead of time. This preliminary temperature maintenance ensures that when the user does respond, the water is already at the correct temperature, providing convenience without requiring excessive energy consumption.
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 optimal brewing temperature is maintained for the user, prevents overheating or underheating, and ensures safe water levels, resulting in better tea quality and user safety.
Implementation Method 1
a heating element, configured to heat water contained in said water compartment
Implementation Method 2
a temperature sensor, configured to generate a reference signal reflecting the temperature of the water contained in said water compartment
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Tea maker (100) comprising a controller (332) operably connected to a heating element (222) for heating water in a water compartment, a temperature sensor (224), a tea filter presence sensor (226) for detecting the insertion of a tea filter into the water compartment, and user notification means, the controller being configured to heat water in the water compartment to an initial steeping temperature; to detect whether the water has been heated to the initial steeping temperature; to notify a user that the water has been heated to the initial steeping temperature, and that steeping may be initiated by insertion of the tea filter; and once the user has been notified to insert the filter, to maintain the temperature of the water within a certain range of the initial steeping temperature until either a certain waiting period lapses, or insertion of the tea filter is detected within said waiting period.