Espresso machine with grinder dosing control
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Solution Overview
Problem
Existing espresso machines with built-in grinders lack user-adjustable features to account for manufacturing tolerances and grind size inconsistencies, leading to variations in coffee strength and quality.
Innovation Solution
An espresso machine with a built-in coffee grinder featuring a microprocessor-controlled system that includes a variable dose strength adjustment knob and a dose toggle switch, allowing users to adjust grind duration based on cup size and grind size settings, ensuring consistent coffee strength and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a built-in grinder is added to an espresso machine, then coffee preparation automation is improved, but manufacturing precision and grind consistency deteriorate due to tolerance variations
Solution Approach 1:
The system dynamically adjusts the grinder motor running time based on user-selected dose strength settings. The microprocessor controls the motor to operate for different durations (e.g., 3-8 seconds) to compensate for manufacturing tolerances and achieve consistent dosing across varying grind sizes and coffee types.
Solution Approach 2:
The invention changes the operational parameter of grind duration to compensate for manufacturing variations. By varying the time the grinder motor runs, the system adjusts the amount of coffee ground to maintain consistent dose strength despite tolerances in grinder component manufacturing.
2Device complexity
If fixed dose settings are used, then device complexity is reduced, but adaptability to user preferences and cup sizes deteriorates
Solution Approach 1:
The system transitions from fixed to dynamic dose control by incorporating user-selectable dose strength settings. The microprocessor receives user input and dynamically adjusts the grinder motor running time, providing adaptability while maintaining relatively simple hardware architecture.
Solution Approach 2:
The invention allows users to change the dose strength parameter through controls that adjust the grinder operational time. This provides versatility for different cup sizes and preferences while keeping the overall device complexity manageable through electronic control.
3Reliability
If longer grind duration is used to compensate for tolerances, then coffee strength consistency is improved, but productivity decreases due to extended preparation time
Solution Approach 1:
The system dynamically optimizes grind duration based on the selected dose strength rather than using a fixed long duration. The microprocessor calculates the appropriate motor running time to achieve consistent dosing while minimizing preparation time, balancing reliability and productivity.
Solution Approach 2:
The invention adjusts the grind duration parameter adaptively rather than using a consistently long grind time. By varying the motor running time according to dose requirements, the system maintains coffee strength consistency while optimizing preparation speed and productivity.
Data Source
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AI summary
An espresso machine has a built-in coffee grinder. An electrical switch toggles between a one cup dose and a two cup dose, The switch works in conjunction with a dose strength adjustment. Alteration of the dose strength adjustment alters the dose strength for both the one cup of two cup dose settings. The internal coffee grinder dispenses into a portafilter that is held in a hand free support cradle. In some embodiments, the upper burr head of the grinder is retained by a bracket. The combination of upper burr head and bracket allows the upper burr head to removed and replaced without having to re-set the grind size.