Coffee maker and preparation method therefor
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Solution Overview
Problem
Ordinary coffee makers fail to fully infiltrate coffee powders due to constant pressure during brewing, resulting in weakly brewed coffee.
Innovation Solution
A coffee maker design that creates a micro-pressure environment by injecting hot water and air into the grinding bean cavity, with a coffee strainer that separates the grinding and beverage cavities, allowing for increased air pressure between 1.3 and 1.7 bar to enhance coffee extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If constant pressure brewing is used in ordinary coffee makers, then the brewing process is simple, but the coffee powders are difficult to be fully infiltrated resulting in weak coffee
Solution Approach 1:
The patent applies dynamics by transitioning from constant pressure brewing to variable pressure brewing. The system dynamically adjusts pressure during the brewing process, creating a pressure difference that enhances water infiltration through coffee powders. The pressure control mechanism allows the brewing system to adapt pressure levels based on brewing stage, improving extraction efficiency while maintaining operational simplicity.
Solution Approach 2:
The patent changes the pressure parameter from constant to variable during brewing. By controlling pressure to vary within a specific range (0.5-2 bar) rather than maintaining constant pressure, the system optimizes water flow through coffee grounds. This parameter change enables better infiltration and extraction without complicating the brewing process for the user.
2Manufacturing precision
If micro-pressure environment is created by injecting air, then coffee infiltration is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by designing the water injection device to perform dual functions: injecting hot water for brewing and injecting air for pressure control. This integrated approach allows the system to create micro-pressure environment without adding separate air injection equipment, thereby improving coffee extraction while minimizing device complexity.
Solution Approach 2:
The system uses the brewing water itself to create the pressure environment by controlling the injection rate and volume. The water injection device regulates flow to naturally generate pressure differences without requiring external pressure sources or complex control mechanisms. This self-service approach simplifies the overall system while achieving the desired micro-pressure brewing conditions.
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 ensures full infiltration of coffee powders, resulting in a stronger brewed coffee by maintaining a controlled micro-pressure environment during the brewing process.
Implementation Method 1
The hot water supply device (5) is configured to inject air to the grinding bean cavity (201), to increase or maintain an air pressure in the pressure space, and an air pressure in the pressure space is greater than or equal to 1 bar, and less than or equal to 2 bar
Implementation Method 2
a coffee strainer, circularly arranged on a periphery of the grinding knife tackle, and a lower part of the coffee strainer abuts a bottom wall of the grinding cavity, to separate the grinding cavity into a grinding bean cavity and a beverage cavity
Data Source
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AI summary
A coffee maker and a coffee preparation method thereof are disclosed, the coffee maker includes: a stator frame; a grinding chamber including a cavity is mounted on the stator frame, and a cover; the cavity is covered by the cover to enclose a grinding cavity, a bottom of the grinding cavity having a beverage outlet communicated with the beverage cavity; a grinding device including a grinding knife tackle disposed in the grinding cavity, and a motor disposed outside the grinding cavity to drive the grinding knife tackle to rotate; a coffee strainer, circularly arranged on a peripheral of the grinding knife tackle; a lower end of the coffee strainer abuts a bottom wall of the grinding cavity to separate the grinding cavity into a grinding bean cavity and a beverage cavity disposed on the periphery of the grinding bean cavity; and a hot water supply device, communicated with the grinding cavity to supply hot water into the grinding bean cavity, a pressure space is formed in an upper grinding bean cavity during supplying hot water, therefore reaching a purpose that a stronger coffee is brewed in a micro-pressure.