Station device on which cleaner is mounted and operating method of station device

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Solution Overview

Problem

Cordless vacuum cleaners face issues with dust collection capacity limitations and potential damage or fire due to AC overvoltage in station devices, which are difficult to detect using conventional methods.

Innovation Solution

The station device incorporates a zero crossing point (ZCP) circuit to detect AC input voltage and a processor that identifies overvoltage by measuring pulse width between ZCPs, deactivating the suction motor to prevent damage or fire.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a ZCP circuit is used to detect AC input voltage, then overvoltage detection capability is improved, but device complexity increases

Engineering Contradiction:

Improveovervoltage detection capabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a ZCP circuit as an intermediary component that detects zero-crossing points of AC input voltage. This mediator enables overvoltage detection by measuring pulse width between ZCPs without requiring direct complex voltage measurement circuitry, thus improving reliability while managing device complexity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces complex electrical voltage measurement systems with a simplified timing-based detection method using ZCP circuitry. By substituting direct voltage magnitude measurement with zero-crossing timing measurement, the system achieves overvoltage detection with simpler electronic components

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If pulse width measurement method is used for overvoltage detection, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improveovervoltage detection precisionVSAvoiddevice complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent substitutes complex voltage magnitude measurement circuits with a timing-based pulse width measurement approach. By measuring the time duration between zero-crossing points, the system achieves precise overvoltage detection using simpler electronic timing components rather than complex analog voltage measurement circuitry

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The ZCP circuit serves as an intermediary that converts voltage magnitude information into time-domain pulse width signals. This transformation enables precise overvoltage detection through timing measurements while keeping the detection circuitry simple and manageable

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP4650792A1Station device on which cleaner is mounted and operating method of station device

Publication Date: 2025.11.19 SAMSUNG ELECTRONICS CO LTD

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AI summary

Provided is a station device configured to detect a first zero crossing point (ZCP) and a second ZCP with respect to an alternating current (AC) input voltage, by using a ZCP circuit configured to detect a ZCP of the AC input voltage applied to the station device, obtain information about a pulse width from the first ZCP to the second ZCP; identify whether the AC input voltage is in an overvoltage state, based on the information about the pulse width from the first ZCP to the second ZCP, and deactivate an operation of the suction motor, when the AC input voltage is in the overvoltage state. Where detecting the first ZCP and the second ZCP includes detecting voltage points which are offset from 0 V by a preset value in the AC input voltage.