Electrostatic precipitator and indoor unit of air conditioner
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Solution Overview
Problem
Existing electrostatic precipitators in air conditioners face challenges in balancing airflow resistance and dust collection performance, necessitating a design that suppresses airflow resistance while improving dust collection efficiency.
Innovation Solution
The electrostatic precipitator design includes a discharge electrode with protrusions aligned along a wall portion, a counter electrode, and a specific relationship between the distances D1 and D2 to optimize airflow and dust collection, utilizing a honeycomb structure for the counter electrode to maintain airflow resistance and enhance dust collection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the distance between discharge electrode and counter electrode is reduced to improve dust collection performance, then dust collection efficiency increases, but airflow resistance increases
Solution Approach 1:
The discharge electrode is divided into multiple segments with protrusions at different positions along the airflow direction. This segmentation allows the electric field to be distributed more evenly, maintaining effective dust collection across a larger volume while preserving airflow passages that reduce resistance
Solution Approach 2:
Protrusions are added to the discharge electrode in the direction perpendicular to the airflow, creating a three-dimensional electric field distribution. This dimensional addition increases the effective discharge area and dust collection volume without narrowing the airflow path, thus maintaining low airflow resistance
2Productivity
If the discharge area of counter electrode is increased to improve dust collection, then dust collection performance improves, but device complexity and space requirements increase
Solution Approach 1:
The protrusions on the discharge electrode serve multiple functions: they increase the discharge area, create multiple ionization zones, and guide airflow patterns. This multi-functionality achieves enhanced dust collection without adding separate components, thereby reducing overall device 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 design effectively suppresses airflow resistance while improving dust collection performance, allowing for efficient air purification by the electrostatic precipitator in air conditioners.
Implementation Method 1
The discharge electrode is disposed on an upstream side of the air flow to generate corona discharge
Implementation Method 2
An electrostatic precipitator is a device that charges dust particles in air passing through an air passageway and captures and collects them using electrostatic force
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An electrostatic precipitator (60) includes a discharge electrode (62), a counter electrode (64), and a wall portion (66). The discharge electrode (62) is disposed on an upstream side of the air flow to generate corona discharge. The counter electrode (64) is disposed on a downstream side of the air flow, while opposing the discharge electrode (62), to collect dust contained in the air. The wall portion (66) is disposed between the discharge electrode (62) and the counter electrode (64) and guides the air from the discharge electrode (62) toward the counter electrode (64). The discharge electrode (62) has a plurality of protrusions (62a) aligned along the wall portion (66) and protruding toward the wall portion (66). When the distance between the discharge electrode (62) and the counter electrode (64) is denoted as D1, and the distance between the protrusions (62a) of the discharge electrode (62) and the wall portion (66) is denoted as D2, the relationship, D1 < D2 < 1.5 × D1 is satisfied.