Dust Sensor Display Logic for Air Conditioner Dew Condensation
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Solution Overview
Problem
Air conditioning apparatuses with dust sensors face misrecognition issues due to dew condensation on lenses, leading consumers to believe the environment is polluted or the sensor is defective, causing performance degradation and increased complaints.
Innovation Solution
A method and apparatus that detect dust concentration considering the time for dew condensation to clear, displaying specific messages to differentiate between normal operation and dew condensation effects, and calculating operation time to notify filter changes, thereby preventing user misinterpretation and maintaining product reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air conditioning apparatus is operated in a cold environment after being stored outdoors, then dew condensation occurs on the dust sensor lenses due to temperature difference, but the system continues to detect dust concentration leading to misrecognition of pollution levels or sensor defects
Solution Approach 1:
The system performs preliminary detection of dew condensation state before conducting dust concentration measurement. By checking whether dew condensation exists on the dust sensor lenses at the start of operation, the system can prevent erroneous dust concentration readings caused by condensation, thereby ensuring reliable detection results.
2Productivity
If the system displays dust concentration immediately upon detection, then real-time monitoring is provided, but user misinterpretation occurs when dew condensation causes false high readings
Solution Approach 1:
The system provides feedback to the user by displaying dew condensation state information alongside dust concentration readings. When dew condensation is detected, the system notifies the user that the reading may be inaccurate, preventing misinterpretation of false high dust concentration values caused by condensation on the lenses.
3Speed
If the dust sensor operates continuously without temperature adaptation, then immediate dust detection is achieved, but dew condensation forms on the lenses due to abrupt temperature difference
Solution Approach 1:
The system performs preliminary detection of dew condensation state before conducting dust concentration measurement. By checking whether dew condensation exists on the dust sensor lenses at the start of operation, the system can prevent erroneous dust concentration readings caused by condensation, thereby ensuring reliable detection results.
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
Prevents user misinterpretation of dew condensation as sensor malfunction, enhancing product reliability and consumer satisfaction by accurately displaying dust concentration and filter status, ensuring normal operation and proper maintenance.
Implementation Method 1
The dust concentration (or the amount of dust) contained in the air may be determined by detecting the amount of light reflected from dust particles P contained in the air through a photo diode of the light receiver 7
Implementation Method 2
light is irradiated toward the air, which flows in the housing 3 through the air inlet, through an infrared light emitting diode (LED) 5a of the light emitter 5
Implementation Method 3
dew condensation may occur in surfaces of lenses 5b and 7b provided in the light emitter 5 and the light receiver 7 of the dust sensor 1 due to an abrupt difference between the indoor and outdoor temperatures
Implementation Method 4
the light emitted from the infrared LED 5a of the light emitter 5 is reflected from a plurality of water droplets in the surfaces of the lenses 5b and 7b and thus the amount of light flowing in a light-receiving sensor 7a of the light receiver 7 may be significantly increased
Data Source
AI summary
A dust concentration display method is provided. The method includes (a) detecting a dust concentration through a dust sensor; (b) displaying a dew condensation message in a display in response to the detected dust concentration being equal to or more than a preset first dust concentration; and (c) detecting the dust concentration in real time for a preset time and displaying the dew condensation message in the display in response to the detected dust concentration being equal to or more than a preset second dust concentration.