Electrical household appliance comprising a base having a gravity-fed boiling chamber
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Solution Overview
Problem
The supply duct in steam-producing household appliances becomes progressively clogged with scale deposits due to the back-and-forth movement of water, leading to appliance malfunction, and existing solutions do not guarantee complete evacuation of scale particles.
Innovation Solution
Incorporating a particle-retention cavity with a transverse wall in the pipe below the inlet opening to trap scale particles, combined with a filtration device and a removable stopper for easy access and evacuation, prevents scale particles from returning to the boiling chamber and clogging the supply duct.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the supply duct allows liquid to flow back and forth between the reservoir and boiling chamber, then the liquid level equilibrium is maintained, but the supply duct becomes progressively clogged with scale deposits
Solution Approach 1:
The invention extracts and removes the harmful scale deposits from the supply duct by providing a separate evacuation duct with a stopper that opens into the exterior environment. This allows the harmful factor (scale) to be separated from the functional flow path while maintaining the liquid equilibrium function.
Solution Approach 2:
The invention segments the duct system into a supply duct for liquid flow and a separate evacuation duct for scale removal. This segmentation allows the supply duct to maintain its function of liquid equilibrium while the evacuation duct handles the harmful scale deposits independently.
2Object-generated harmful factors
If an evacuation duct with removable stopper is added to the supply duct, then scale evacuation is enabled, but the appliance structure becomes more complex
Solution Approach 1:
The invention merges the evacuation function into the existing duct structure by making the evacuation duct a lateral branch of the supply duct. This integration allows scale evacuation capability to be added without creating a completely separate system, thereby limiting the increase in structural complexity.
3Volume of moving object
If the appliance is designed to be compact, then the base size is reduced, but access for cleaning and maintenance becomes difficult
Solution Approach 1:
The stopper acts as an intermediary element that provides access to the evacuation duct through the compact base structure. By opening the stopper, the exterior environment serves as an intermediary space that allows scale removal without requiring large openings or complex disassembly of the base.
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 effectively prevents clogging by collecting and removing scale particles, extending the appliance's lifespan and ensuring a compact, ergonomic, and efficient cleaning process.
Implementation Method 1
a liquid reservoir supplying the boiling chamber by gravity, the liquid flowing by gravity from the reservoir toward the boiling chamber
Implementation Method 2
the shape of the retention cavity is adapted to retain the scale particles and prevent them from returning to the boiling chamber by being carried by the liquid flowing from the inlet opening toward the communication opening
Data Source
AI summary
An electrical household appliance includes a base for producing steam having a steam generator including a boiling chamber and a liquid reservoir supplying the boiling chamber by gravity, the liquid flowing by gravity from the reservoir toward the boiling chamber until the liquid level in the boiling chamber reaches an equilibrium level, called the reference level, at which the liquid level in the appliance prevents air from entering the reservoir, the boiling chamber including a steam outlet through which steam can escape toward a work tool, such as a smoothing brush, and a communication opening connected to a pipe having an evacuation opening closed with a removable stopper, wherein the pipe is supplied with liquid from the reservoir via a supply duct that leads to the pipe at the level of an inlet opening provided above a particle-retention cavity arranged in the lower part of the pipe.