Electric dust collecting apparatus and air conditioner including same
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Solution Overview
Problem
Existing electrostatic precipitators generate ozone as a byproduct of high-voltage corona discharge, which is hazardous, and often suffer from increased discharge inception voltage and reduced efficiency due to dust accumulation on the discharging electrode.
Innovation Solution
The electrostatic precipitator design includes a charging assembly with a discharging electrode heated by a first power source and a corona discharge generated by a second power source applied to counter electrodes, which reduces ozone generation and maintains high charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high voltage is applied to generate corona discharge for charging foreign substances, then charging efficiency is improved, but ozone generation increases which is hazardous
Solution Approach 1:
The patent divides the charging assembly into two separate power sources: a first power source that applies low voltage to the discharging electrode to generate heat, and a second power source that applies high voltage to the counter electrode to generate corona discharge. This segmentation allows the corona discharge to occur primarily at the counter electrode rather than the discharging electrode, reducing ozone generation while maintaining charging efficiency.
Solution Approach 2:
The patent changes the voltage parameters applied to different electrodes. The discharging electrode receives low voltage (first voltage) primarily for heating, while the counter electrode receives high voltage (second voltage) for corona discharge. This parameter change optimizes the balance between charging efficiency and ozone reduction by controlling where and how corona discharge occurs.
2Productivity
If high voltage is continuously applied to the discharging electrode for corona discharge, then charging efficiency is improved, but discharge inception voltage increases due to dust accumulation
Solution Approach 1:
The patent applies low voltage to the discharging electrode before applying high voltage to the counter electrode. This preliminary heating action prevents dust and foreign substances from accumulating on the discharging electrode surface, thereby maintaining stable discharge inception voltage and preventing the need for increasingly higher voltages to sustain corona discharge.
Solution Approach 2:
The patent converts the potentially harmful effect of dust accumulation (which increases discharge inception voltage) into a beneficial heating effect. By applying low voltage to heat the discharging electrode, the patent prevents dust adhesion and maintains reliable corona discharge conditions, turning a problem into a solution.
3Object-generated harmful factors
If low voltage is applied to the discharging electrode to reduce ozone generation, then ozone generation is reduced, but ion generation efficiency decreases
Solution Approach 1:
The patent merges two functions into the discharging electrode: low voltage application for heating and high voltage application for corona discharge. The low voltage heats the electrode to prevent dust accumulation, while the high voltage (applied to the counter electrode) generates corona discharge and ions. This merging of functions allows ozone reduction while maintaining ion generation efficiency.
Solution Approach 2:
The discharging electrode acts as an intermediary that receives low voltage for heating purposes, which then enables the counter electrode to generate corona discharge more efficiently. The heated discharging electrode prevents dust accumulation that would otherwise interfere with corona discharge, thereby maintaining ion generation efficiency while reducing ozone generation.
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
This configuration effectively reduces ozone generation, lowers the discharge inception voltage, and enhances the ion generation efficiency, while preventing foreign substances from adhering to the discharging electrode, thus improving overall precipitator performance.
Implementation Method 1
The discharging electrode may be configured to generate heat by the first voltage
Implementation Method 2
a corona discharge may occur at the discharging electrode by the second voltage
Implementation Method 3
a dust collecting assembly configured to collect the foreign substances charged by the charging assembly
Data Source
AI summary
A high-efficiency electric dust collecting apparatus comprises: an electrifying unit; and a dust collecting assembly configured to collecting foreign substances electrified in the electrifying unit, wherein the electrifying unit comprises: a plurality of corresponding electrodes; at least one discharging electrode arranged between the plurality of corresponding electrodes; a first power source configured to apply a first voltage across both ends of the discharging electrode; and a second power source configured to apply a second voltage to each of the plurality of corresponding electrodes, wherein the first power source and the discharging electrode form a closed circuit, and the second power source and the plurality of corresponding electrodes form an open circuit.