Dryer Controller Detecting Incomplete Drying via Sensor Data

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Solution Overview

Problem

Existing dryers face challenges in detecting incomplete drying due to factors like filter clogging, duct clogging, refrigerant insufficiency, heater failure, and operation interruptions, making it difficult to recognize and address the cause of incomplete drying effectively.

Innovation Solution

The dryer includes a controller that uses temperature sensors and an electronic expansion valve to monitor and compare data during operations, identifying issues such as duct clogging, cooling device failure, refrigerant insufficiency, and heater failure, and notifies the user or external devices to take corrective actions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multiple sensors and data storage are added to detect incomplete drying causes, then detection capability is improved, but device complexity increases

Engineering Contradiction:
Improvedetection capabilityVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system divides the detection function into multiple specialized sensors (temperature sensor in duct, temperature sensor on compressor, temperature sensor on power module, humidity sensor in drum) that each monitor specific parameters. This segmentation allows precise detection of different failure modes (duct clogging, refrigerant insufficiency, heater failure, cooling device failure) without requiring a single complex detection system.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The controller serves multiple functions: it not only controls the drying cycle but also collects data from all sensors, stores historical data in the storage device, compares current data with stored data, identifies failure causes, and communicates with external devices. This multi-functionality consolidates what would otherwise be separate systems into a single integrated controller, managing complexity rather than increasing it.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If real-time monitoring and data comparison are performed to identify failure causes, then reliability is improved, but use of energy increases

Engineering Contradiction:
ImprovereliabilityVSAvoiduse of energy
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The controller performs data comparison and failure identification at periodic intervals or at key moments during the drying cycle, rather than continuously analyzing all sensor data in real-time. The system stores historical data and compares it with current readings at strategic points, maintaining high reliability while minimizing energy consumption associated with continuous processing.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system establishes feedback loops where sensor data is continuously monitored, compared with stored baseline data, and used to identify deviations indicating failures. This feedback mechanism allows the system to maintain high reliability by quickly detecting anomalies while only consuming significant energy when comparisons reveal actual failures or when corrective actions are needed.

Inventive Principle:
Principle #23Feedback

3Productivity

If comprehensive failure detection is implemented, then productivity is improved by preventing incomplete drying, but device complexity increases

Engineering Contradiction:
ImproveproductivityVSAvoiddevice complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The system performs preliminary detection and identification of potential failures during the drying cycle before incomplete drying actually occurs. By continuously monitoring sensor data and comparing it with stored baseline data, the system can identify duct clogging, refrigerant insufficiency, or other failures early and alert the user, allowing corrective action before productivity is significantly impacted.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The dryer performs self-diagnosis through automatic comparison of sensor data with stored reference data, identifying failure causes without requiring external inspection. The controller automatically detects patterns indicating specific failures (e.g., temperature deviations indicating duct clogging, humidity patterns indicating heater failure) and communicates findings to the user, enabling self-service monitoring that improves productivity without proportionally increasing complexity.

Inventive Principle:
Principle #25Self-service

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

The system facilitates timely detection and prevention of incomplete drying by identifying the root cause, allowing for proactive maintenance and reducing the likelihood of extended drying times or incomplete drying cycles.

Implementation Method 1

a heat pump and a duct accommodating an evaporator and a condenser of the heat pump and configured to heat air flowing in from the drum

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 2

a controller configured to identify a factor to be controlled from among a plurality of factors causing incomplete drying, based on at least one of output data from a plurality of temperature sensors configured to detect temperature of each of the heat pump, the power module, and the duct or opening degree data of an electronic expansion valve provided in the heat pump

Methodology Applied
Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentEP4180562B1Dryer and method for controlling same
Publication Date: 2026.03.18 SAMSUNG ELECTRONICS CO LTD
  • EP4180562B1 patent drawingFigure 1
  • EP4180562B1 patent drawingFigure 2
  • EP4180562B1 patent drawingFigure 3

AI summary

A dryer according to one embodiment comprises: a drum; a heat pump; a user interface; a power module for controlling power supply to a drum motor connected to the drum and a compressor motor of the heat pump; a duct with accommodates an evaporator and a condenser of the heat pump, heats air flowing in from the drum, and discharge the air to the drum; a plurality of temperature sensors for sensing the temperature of each of the heat pump, the power module, and the duct; and a control unit for controlling the user interface to determine a management target factor among a plurality of factors causing incomplete drying on the basis of at least one of output data of the plurality of temperature sensors or opening degree data of an electronic expansion valve provided in the heat pump, and to output a notification for the management target factor.