Boiler Discharge Aperture With Pivoting Element for Limescale Drainage

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Solution Overview

Problem

Boilers used in domestic and professional machines face challenges in safely and conveniently discharging water and limescale, leading to potential uncontrolled leaks and risks from high-temperature caps during maintenance.

Innovation Solution

A boiler design featuring a horizontally pivoting inclinable element near the discharge aperture, which rotates from a vertical to an inclined position, allowing safe insulation and facilitating the discharge of water and limescale while preventing re-entry and spills, and a cap that can be safely handled due to its temperature-resistant material and design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the boiler uses a traditional discharge aperture design, then the structure is simple, but the water discharge operation is inconvenient and difficult to perform

Engineering Contradiction:
Improvewater discharge operationVSAvoiddischarge aperture structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The discharge aperture is equipped with a rotatable cap that can rotate between a closed position (during normal operation) and an open position (for water discharge). This dynamic mechanism allows the aperture to change its state based on operational needs, making water discharge convenient while maintaining structural simplicity.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If the discharge aperture is positioned for easy water removal, then water discharge is facilitated, but the cap reaches very high temperatures becoming a risk factor for users

Engineering Contradiction:
Improvewater discharge facilitationVSAvoidburn risk from cap
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The harmful high-temperature cap is extracted from the user's reach area. The cap is positioned such that when rotated to the open position for water discharge, it is no longer in contact with or near the user's hands. This separates the hot component from the user interaction zone, eliminating the burn risk while maintaining discharge functionality.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The rotatable cap mechanism acts as an intermediary between the high-temperature interior and the user's hands. By requiring rotation to open, it creates a temporal and spatial buffer that allows the cap to move away from the user's reach before water discharge begins, mediating the harmful thermal exposure.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Productivity

If the discharge aperture allows easy water flow, then discharge efficiency is improved, but uncontrolled leakages occur during water conveyance

Engineering Contradiction:
Improvewater discharge efficiencyVSAvoidcontrolled discharge
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The rotatable cap provides dynamic control over the discharge aperture. When closed, it prevents any leakage; when rotated to the open position, it allows controlled water flow. This dynamic state change enables efficient discharge while maintaining reliability, as the user has full control over when discharge occurs.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The user performs the preliminary action of rotating the cap to the open position before water discharge begins. This preliminary control action ensures that the discharge is intentional and controlled, preventing uncontrolled leakages while maintaining high discharge efficiency once initiated.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP3446043B1boiler
Publication Date: 2020.11.18 DE LONGHI APPLIANCES SRL
  • EP3446043B1 patent drawingFigure 1~2
  • EP3446043B1 patent drawingFigure 3

AI summary

Boiler for generating steam and/or for heating water (13) that comprises a metal container (12) provided at least with an aperture (14) to feed the water (13) and an aperture (22) to discharge the water (13) and/or possible limescale (15). The discharge aperture (22) is selectively closable by a cap (24), and the boiler also comprises a heating element (18) associated with the container (12).