UV Irradiation Control in Air Conditioners Under Temperature Drift
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Solution Overview
Problem
Existing air conditioners face a decrease in sterilization effect due to varying ambient temperatures affecting the intensity of deep ultraviolet rays used for sterilization, leading to insufficient illumination for effective sterilization of drain water.
Innovation Solution
An air conditioner system that includes an irradiation unit for ultraviolet rays, a temperature detection unit to monitor ambient temperature, and a control unit to adjust irradiation time based on detected temperature, ensuring optimal illumination intensity for sterilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the irradiation unit operates at higher ambient temperature, then the device can function in warmer environments, but the illumination intensity of deep ultraviolet rays decreases leading to reduced sterilization effect
Solution Approach 1:
The irradiation time is dynamically adjusted based on the detected ambient temperature. When the temperature exceeds the reference temperature, the control unit increases the irradiation time to compensate for the reduced illumination intensity, ensuring the UV dose remains sufficient for sterilization.
Solution Approach 2:
The temperature detection unit continuously monitors the ambient temperature of the irradiation unit and provides feedback to the control unit. The control unit uses this feedback to automatically adjust the irradiation time, creating a closed-loop control system that maintains effective sterilization across varying temperatures.
2Reliability
If the irradiation time is extended to compensate for lower illumination intensity at high temperatures, then sterilization effectiveness is maintained, but energy consumption increases
Solution Approach 1:
The control unit changes the irradiation time parameter based on temperature conditions. By calculating the required UV dose and adjusting the irradiation time according to the relationship between temperature and illumination intensity, the system maintains sterilization effectiveness while optimizing energy consumption rather than using a fixed extended time.
3Device complexity
If the irradiation unit is operated without temperature-based adjustment, then the device structure remains simple, but the sterilization effect becomes insufficient at elevated temperatures
Solution Approach 1:
A temperature detection unit provides real-time feedback on the ambient temperature to the control unit, which automatically adjusts the irradiation time accordingly. This feedback mechanism ensures reliable sterilization at varying temperatures without requiring complex manual intervention or overly sophisticated control systems.
Solution Approach 2:
The system performs self-adjustment based on temperature conditions. The control unit automatically modifies the irradiation time according to the detected ambient temperature, eliminating the need for manual intervention and maintaining effective sterilization without adding significant operational complexity.
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 effectively maintains sterilization effectiveness by adjusting irradiation time in response to ambient temperature changes, preventing damage to the irradiation unit and ensuring a sufficient UV dose for sterilization, thus maintaining cleanliness within the indoor unit.
Implementation Method 1
an irradiation unit configured to irradiate an irradiation area of an indoor unit of the air conditioner with ultraviolet rays
Implementation Method 2
The irradiation with deep ultraviolet rays causes denaturation or inactivation of bacteria, mold, or the like contained in the drain water
Implementation Method 3
a temperature detection unit configured to detect an ambient temperature of the irradiation unit
Data Source
AI summary
Provided is an air conditioner including an irradiation unit that irradiates an irradiation area of an indoor unit with ultraviolet rays, a temperature detection unit that detects an ambient temperature of the irradiation unit, and a control unit that controls an irradiation time of the irradiation unit. The control unit controls the irradiation time in accordance with the ambient temperature detected by the temperature detection unit.