Manual Pump Flow Control for Clear Lever Feedback in Beverage Machines
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Solution Overview
Problem
Beverage preparation machines with manually operated pumps lack reliable feedback on the fully charged state of the potential energy accumulator, leading to cumbersome handling and undefined lever positions during operation.
Innovation Solution
Incorporating flow control means with at least two modes to regulate liquid flow into the pressurizing chamber, allowing the pump to operate without filling the chamber when the accumulator is charged, enabling the lever arrangement to return to a rest position and reducing mechanical constraints, using a system of valves to manage liquid flow based on the filling state and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the liquid chamber is completely filled with liquid provided by the pump, then the potential energy accumulator is charged and liquid pressure is sufficient for beverage preparation, but the pump remains filled with liquid and the lever arrangement can no longer be moved, resulting in an undefined position and no reliable feedback for the user
Solution Approach 1:
The patent implements feedback by using the lever arrangement itself as an indicator of the charging state. When the lever can be moved, it indicates the accumulator is charged and ready for beverage preparation. When the lever cannot be moved, it indicates the chamber is full and needs to be emptied. This provides clear, intuitive feedback to the user about the system state without requiring additional indicators or displays.
Solution Approach 2:
The system uses the user's own interaction with the lever arrangement to both indicate and resolve the charging state. The user discovers the charging status by attempting to move the lever, and the same lever movement action that checks the status also empties the chamber if needed, combining detection and correction into a single user action.
2Productivity
If the lever arrangement protrudes from the housing in an undefined direction during beverage preparation, then the pump can be operated, but handling of the machine becomes rather cumbersome
Solution Approach 1:
The patent makes the lever arrangement dynamic rather than fixed. The lever can be positioned in different locations (protruding or retracted) depending on the operational needs. When beverage preparation is needed, the lever protrudes to enable pump operation. When the chamber is full, the lever is retracted to allow chamber emptying. This dynamic positioning optimizes both productivity and ease of operation at different stages of the process.
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
Enables reliable operation of the pump in the charged state without further filling the pressurizing chamber, simplifies control of the motorized driving arrangement, and provides a clear feedback mechanism for the user, improving handling and reducing mechanical constraints.
Implementation Method 1
a manual pump for filling a pressurizing liquid chamber with liquid from a reservoir
Implementation Method 2
The energy accumulator is designed to be compressed and thus charged by pumping liquid from a reservoir to the liquid chamber
Implementation Method 3
The pressurized liquid is then made to interact with the provided ingredients in order to form the beverage
Data Source
AI summary
The invention relates to a beverage preparation machine (20) for providing a pressurized liquid to a dose of beverage ingredients (10) such as a coffee capsule, the machine comprising a pressurizing liquid chamber (1) designed for being filled with a predefined amount of liquid upon operation of a liquid pump (2) connected to a liquid reservoir (3) of the machine, a potential energy accumulator (4) that is associated to the pressurizing liquid chamber (1) and which is designed for being brought into a charged position upon filling of the pressurizing liquid chamber (1), a brewing chamber (5) for receiving the dose of beverage ingredients (10) and which is designed for being selectively brought in fluid communication with the pressurizing liquid chamber (1), the machine (20) further comprising flow control means (6a,6b) designed for regulating the amount of liquid conveyed from the liquid pump (2) into the pressurizing liquid chamber (1) depending on an operating position of the potential energy accumulator (4) and/or on the pressure of liquid in the pressurizing chamber (1).