Beverage Machine Power Switching With a Single Operating Element
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Solution Overview
Problem
Conventional beverage preparation machines consume power continuously due to always-supplied control units, posing safety risks and inefficiencies, and existing dual-switch designs can confuse users, potentially disrupting operational processes.
Innovation Solution
A beverage preparation machine with a single operating element that controls both switch contacts, allowing power to be switched on and off safely and efficiently, using a parallel circuit with a control unit that manages the power state to prevent unintended power outages and ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control unit is constantly supplied with power when the electric circuit is connected to the power supply, then the control unit is always ready to carry out certain functions, but the beverage preparation machine is constantly using power and there is a safety risk
Solution Approach 1:
The electric circuit is segmented into two separate switches: a first switch (S1) that controls power to the control unit, and a second switch (S2) that controls power to the functional units. This segmentation allows independent control of power supply to different components, enabling the control unit to remain powered while functional units can be switched off to reduce power consumption and eliminate safety risks associated with unsupervised operation.
2Use of energy by moving object
If two switches are provided in the electric circuit, one for the control unit and one for functional units, then power can be completely switched off, but users may confuse the switches and operate the wrong one
Solution Approach 1:
The patent merges the control of both switches under a single operating element (22). The operating element can selectively activate either the first switch (S1) or the second switch (S2) based on the current state, eliminating user confusion about which switch to operate while maintaining the ability to completely power off the machine when needed.
3Ease of operation
If a single operating element controls both switch contacts, then operation is simplified, but the control logic becomes more complex to prevent unintended power outages
Solution Approach 1:
The control unit implements feedback logic that monitors the state of both switches and the operating element. When the operating element is actuated, the control unit determines which switch should be activated based on the current system state, preventing unintended power outages. The feedback mechanism ensures that activating one switch does not inadvertently deactivate the other, maintaining system stability while preserving operational simplicity.
Data Source
AI summary
A beverage preparation machine is electrically operated and has a control unit, at least one functional unit, and an electric circuit for supplying the functional unit and the control unit with current. The electric circuit has a switch for switching the current on or off, through respective first and second operations of an operating element. The switch has a first switch contact and a second switch contact, which are connected in parallel in the electric circuit. The first switch contact is brought into a closed state by the first operation of the operating element, and assumes an open state after the second operation. The control unit provides a control signal so that the second switch contact is closed after the first operation of the switch and opened after the second operation of the switch.