Espresso Hot Water Group With Winding Heating Path and Protected Probe
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Solution Overview
Problem
Existing machines for preparing beverages, such as espresso, face challenges in rapidly and predictably supplying water heated to a desired temperature, often resulting in incomplete emptying of the supply path and issues with limescale encrustations affecting temperature probe efficiency.
Innovation Solution
A hot water supplying group with a winding heating path and a temperature probe positioned inside the inner core, which detects the temperature of the water near the outlet, preventing direct contact with water and minimizing limescale influence, combined with a solenoid valve and preheating system for precise temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature probe is placed in direct contact with water to measure temperature, then temperature detection accuracy is improved, but limescale encrustations accumulate on the probe reducing its efficiency and duration
Solution Approach 1:
The patent introduces an intermediary substance (transparent adhesive layer) between the temperature probe and the water flow path. This adhesive layer acts as a mediator that allows thermal energy transfer from water to the probe while preventing direct contact, thereby eliminating limescale accumulation on the probe surface while maintaining accurate temperature detection through thermal conduction across the adhesive layer.
2Productivity
If the water supply path is not completely emptied to maintain continuous flow, then rapid water heating is achieved, but incomplete emptying leads to limescale encrustations and temperature probe inefficiency
Solution Approach 1:
The transparent adhesive layer serves as a protective intermediary that allows the system to maintain continuous water flow (improving productivity) without the harmful side effect of limescale deposition on the probe. The adhesive barrier prevents mineral accumulation while still allowing thermal coupling for accurate temperature measurement during continuous operation.
Solution Approach 2:
The adhesive layer provides beforehand protection against limescale encrustations by creating a non-porous barrier between the water flow and probe surface. This prior cushioning prevents the accumulation problem before it can occur, allowing continuous water supply without degradation of probe efficiency.
3Device complexity
If a straight heating path is used for water flow, then device complexity is reduced, but water does not reach desired temperature rapidly and predictably
Solution Approach 1:
The patent employs a winding or spiral heating path configuration instead of a straight path. This curved geometry increases the length of the heating path and the surface area contact between water and heating elements, thereby improving heat transfer efficiency and ensuring water reaches the desired temperature rapidly and predictably, while the path remains contained within a compact device structure.
Solution Approach 2:
The heating path transitions from a one-dimensional straight line to a two-dimensional or three-dimensional winding configuration. This dimensional change allows the heating path to coil through the water accumulation chamber, maximizing heat exchange surface area and residence time within a compact volume, thus improving heating performance without proportionally increasing device size.
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 rapid, stable, and predictable water heating to the desired temperature, reducing limescale formation and extending probe efficiency, while allowing for modular design and efficient beverage extraction.
Implementation Method 1
a heating path (13), wherein said heating path comprises an inlet for receiving water from the outlet of said accumulation chamber and an outlet for dispensing heated water into a brewing chamber
Implementation Method 2
the inner core comprises a temperature probe for detecting a temperature of the heated water
Implementation Method 3
said heating path comprises a path bounded by a heatable outer surface and an inner core
Data Source
AI summary
A group (6) for supplying hot water in a machine for preparing and dispensing a beverage, for example espresso coffee, comprising: a water accumulation chamber (14) with an inlet (11) for receiving water and an outlet (12); and a heating path (9, 13). The heating path comprises an inlet for receiving water from the outlet (12) of the accumulation chamber (14) and an outlet (15) for dispensing heated water into a brewing chamber (16) for preparing a beverage. The heating path comprises a path bounded by a heatable outer surface (13) and an inner core (9). The inner core (9) comprises a temperature probe (8) located in proximity of the outlet (15) for dispensing heated water.