Electric control box and window air conditioner
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Solution Overview
Problem
Existing electric control boxes in window air conditioners suffer from moisture damage due to water entering through assembly gaps between the bottom plate and the box cover, which can damage the electric control assemblies inside.
Innovation Solution
The electric control box is designed with a water blocking member at the edge of the inner box cover that protrudes outward to prevent water from flowing into the inner box cover, improving the waterproof performance and reducing moisture damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple box body structure with bottom plate and box cover is used, then the device complexity is reduced, but water enters through assembly gaps causing moisture damage to electric control assemblies
Solution Approach 1:
The box cover is divided into an outer box cover and an inner box cover, creating a nested structure. The water blocking member is integrated into the inner box cover, separating the waterproofing function from the basic enclosure structure. This segmentation allows the simple overall structure to achieve enhanced waterproof performance through functional division.
Solution Approach 2:
The water blocking member acts as an intermediary element between the outer box cover and inner box cover. It protrudes from the edge of the inner box cover toward the outer box cover, creating a barrier that intercepts water before it can enter the assembly gap, thus protecting the electric control assemblies without complicating the overall structure.
2Ease of manufacture
If the box cover is made with single-layer construction, then the manufacturing process is simplified, but water can flow along the side wall into the assembly gap and damage internal components
Solution Approach 1:
The inner box cover is nested within the outer box cover, forming a protective layered structure. The water blocking member on the inner box cover extends toward the outer box cover, creating a nested barrier system that prevents water infiltration while maintaining relatively simple manufacturing processes for each individual cover component.
Data Source
AI summary
An electric control box includes a box body. The box body includes a bottom plate, a box cover covering the bottom plate, an electric control assembly mounted at the bottom plate and including an electric control board and a heat sink mounted at the electric control board, and a sealing sleeve sleeved on a circumference of the heat sink. The box cover is provided with an extension opening for the heat sink to protrude outward. An inner surface of the box cover is formed with a sink groove on a circumference of the extension opening, and the sink groove is fitted and engaged with the sealing sleeve.