Liquid heating apparatus
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Solution Overview
Problem
Conventional liquid heating appliances, such as kettles, often require users to manually adjust valves to heat specific volumes of water, leading to inefficiencies in energy usage and longer heating times due to overfilling, and can result in wasted energy as excess water cools in the appliance.
Innovation Solution
A liquid heating appliance with a partitioned reservoir and valves arranged at an obtuse angle to promote convection currents, allowing for automatic filling and refilling of a predefined volume in 'hot-cup' mode and efficient heating in 'kettle' mode, with a floating valve member that closes the first chamber when filled, and a separate heating arrangement for both chambers to ensure uniform heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a user manually operates a valve to heat only a small volume of water in the first chamber, then energy consumption is reduced, but the operation becomes inconvenient and time-consuming
Solution Approach 1:
The float valve automatically closes the first chamber when the water level reaches a predetermined height, eliminating the need for manual valve operation. The system serves itself by using the floating mechanism to detect water level and automatically seal the chamber, allowing users to simply fill water and press the heating button without manual intervention for volume control
Solution Approach 2:
The manual rotary valve mechanism is replaced with an automatic float valve system that uses buoyancy mechanics. Instead of requiring users to manually rotate a valve plate to close apertures, the floating valve member automatically rises with water level and mates with the valve seat to close the chamber, substituting manual mechanical operation with automatic mechanical response
2Productivity
If a user fills the kettle with a large volume of water, then the kettle can be used multiple times, but energy is wasted heating excess water that is not used
Solution Approach 1:
The water reservoir is divided into a first chamber and a second chamber separated by a partition with a float valve. The first chamber has a limited capacity that automatically seals when full, creating distinct functional zones. Users can heat only the volume needed in the first chamber without heating excess water in the second chamber, segmenting the heating function to match actual usage requirements
Solution Approach 2:
The heating element is positioned to heat water locally in the first chamber. The float valve creates a localized sealed environment that prevents heat from being wasted on water that will not be used. The system applies heating quality selectively to only the necessary volume rather than heating the entire reservoir
3Speed
If the first chamber is heated directly by a heating element, then heating speed is improved, but uniform heating of the water is difficult to achieve
Solution Approach 1:
The heating element is positioned asymmetrically at the base of the first chamber rather than uniformly distributed. This asymmetric heating creates intentional convection currents where water near the heating element heats up, rises, and circulates throughout the chamber, promoting more uniform temperature distribution while maintaining fast heating speed
Solution Approach 2:
The heating process induces natural convection currents and water movement within the first chamber. The asymmetric heating creates dynamic fluid motion that continuously mixes the water, preventing stagnant hot spots and ensuring more uniform temperature distribution throughout the chamber during the heating process
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
This design allows for quick heating of small volumes of liquid, reduces energy waste, and ensures uniform heating by promoting convection currents, thus enhancing operational efficiency and user convenience.
Implementation Method 1
the float valve comprises a floating valve member arranged to float and mate with a valve seat and thereby close the valve in order to prevent the flow of liquid through the valve
Implementation Method 2
a heating arrangement arranged to heat, in use, liquid contained within the first chamber
Implementation Method 3
valves arranged at an obtuse angle to promote convection currents
Data Source
AI summary
A reservoir of a liquid heating appliance includes a first chamber and a second chamber, separated by a partition. A heating arrangement is arranged to heat liquid in the first chamber. A first valve, a second valve and a float valve are disposed in the partition to selectively allow liquid to flow between the first and second chambers. Respective lines joining the first and second valves to a center of the partition have an obtuse angular separation. The first and second valves are selectively closed by a valve closure member. The float valve includes a floating valve member arranged to float and mate with a valve seat to prevent the flow of liquid. A liquid outlet in the first chamber connects with a dispense outlet on the appliance to allow liquid to be dispensed when the first and second valves are closed.