Compact Heat Exchanger for On-Demand Beverage Temperature Control
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Solution Overview
Problem
Professional beverage machines, such as those used in bars, face energy inefficiencies and temperature instability when preparing multiple beverages, leading to suboptimal organoleptic properties due to large boilers and inadequate heat management.
Innovation Solution
A machine with a heat exchanger and dispensing assembly that maintains water temperature stability and precision, using a thermally conductive core and insulating materials to optimize heat exchange and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tank boilers are used to heat large quantities of water for multiple beverages, then the machine can operate reliably with full load and avoid waiting times, but large energy losses occur as the boiler must remain continuously active to prevent water from cooling
Solution Approach 1:
The patent extracts the heating function from a large continuous boiler and relocates it to a compact heat exchanger that heats water on-demand. The heat exchanger is integrated into the dispensing assembly, separating the heating function from bulk water storage, thereby eliminating the need for continuous boiler operation while maintaining reliable beverage preparation.
Solution Approach 2:
The system transitions from continuous heating (boiler always on) to periodic heating (heat exchanger activates only when beverage is requested). The control system triggers the heating element in the heat exchanger based on dispensing requests, creating periodic heating cycles that match actual demand and reduce energy waste.
2Loss of time
If the machine is left turned on during the night to prevent water from getting cold, then ready availability is ensured, but excessive energy consumption occurs during non-operational hours
Solution Approach 1:
The system enables self-service heating where the heat exchanger automatically activates when a beverage request is detected, eliminating the need for pre-heating or continuous operation. The machine serves itself by triggering heating only when needed, rather than requiring manual intervention or continuous power consumption to maintain readiness.
Solution Approach 2:
The control system performs preliminary preparation by pre-positioning the heat exchanger and associated components in a ready state, but only activates heating when a beverage request is received. This allows the machine to be turned off during non-operational hours while still being able to quickly prepare beverages when needed.
3Loss of energy
If a compact heat exchanger is used instead of a large boiler, then energy efficiency is improved, but the liquid may cool during dispensing and reach temperatures below the desired dispensing temperature
Solution Approach 1:
The patent merges the heat exchanger and dispensing assembly into a single integrated unit. The heat exchanger is positioned in direct thermal and fluidic connection with the dispensing mechanism, allowing continuous heat transfer to the liquid throughout the dispensing process. This integration ensures temperature stability despite the compact size and on-demand operation.
Solution Approach 2:
The heating action continues throughout the entire dispensing process rather than occurring in separate stages. The heat exchanger maintains continuous thermal contact with the liquid as it flows through the dispensing assembly, ensuring the liquid receives ongoing heating to compensate for cooling during dispensing and maintains the desired temperature.
4Temperature
If the heat exchange surface is increased to maintain temperature stability, then temperature uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent applies heat exchange surfaces strategically at specific locations within the dispensing assembly where thermal contact is most effective. Rather than uniformly distributing heat exchange throughout a large volume, the design concentrates heat transfer surfaces at critical points in the fluid path, achieving temperature stability with minimal material and structural complexity.
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
The machine effectively maintains beverage temperature stability and precision, reducing energy consumption and improving the quality and consistency of prepared beverages.
Implementation Method 1
a heat exchanger (6) for the liquid L, which is proper to heat the liquid L at a predetermined temperature
Implementation Method 2
a thermally conductive core and insulating materials to optimize heat exchange
Implementation Method 3
using a thermally conductive core and insulating materials to optimize heat exchange and reduce energy consumption
Data Source
Figure 1
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AI summary
Method and machine for preparing beverages, in particular infusions, such as coffee or tea, having a liquid supply source (2) supplying a liquid, in particular water, an infusion chamber (4) and an infusion circuit (5), which connects said supply source (2) to said infusion chamber (4); the machine having an infusion circuit (5) with a heat exchanger and a dispensing assembly (3; 3'), which is configured to heat the liquid at a predetermined temperature that is lower than the boiling temperature of the liquid, for example at approximately 90°, before the infusion of the liquid itself on the inside of the infusion chamber (4).