Wall-Mounted Indoor Unit Back Case Structure Against Dew Condensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In air conditioning devices, dew condensation occurs on the back surface of the back case during cooling operations, leading to water droplets forming and potentially dropping onto the floor, necessitating a solution to prevent this dew condensation.
Innovation Solution
The indoor unit design includes a back case composed of two members: an air outlet passage wall member and an installation member, with a space between them to prevent dew condensation by maintaining a heat insulation effect and reducing temperature transfer, eliminating the need for a dew condensation water collecting mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the air outlet passage wall is used to guide cooled air, then the air conditioning function is improved, but dew condensation occurs on the back surface of the back case
Solution Approach 1:
An air shield wall is introduced as an intermediary component between the cooled air outlet passage and the back case back surface. This air shield wall prevents the direct contact between cold air and the back case, thereby preventing dew condensation while maintaining the air conditioning function. The air shield wall acts as a thermal barrier that blocks the harmful effect of cold air on the back case surface.
Solution Approach 2:
The back case is segmented into multiple functional walls: the air outlet passage wall for guiding cooled air, the air shield wall for preventing dew condensation, and the back surface for structural support. This segmentation allows each wall to perform its specific function independently, resolving the contradiction between air conditioning efficiency and dew condensation prevention.
2Reliability
If a dew condensation water collecting mechanism is added to prevent water droplets, then dew condensation damage is prevented, but device complexity increases
Solution Approach 1:
Instead of collecting and disposing of dew condensation water (which would require complex drainage mechanisms), the invention converts the harmful cold air that causes dew condensation into a beneficial protective layer. The air shield wall utilizes the cold air flow to create a protective barrier that actually prevents dew condensation on the back case, turning the harmful factor into a beneficial one.
Solution Approach 2:
The harmful effect of cold air on the back case is extracted and isolated by the air shield wall, which separates the cold air flow path from the back case back surface. This extraction eliminates the need for complex dew condensation collection and drainage systems, as the harmful effect is prevented at its source rather than managed after occurrence.
3Ease of manufacture
If the back case is made as a single integrated component, then manufacturing is simplified, but dew condensation cannot be effectively prevented
Solution Approach 1:
The back case is divided into multiple separate walls (air outlet passage wall, air shield wall, and back surface) that can be manufactured independently and then assembled. This segmentation enables each component to be optimized for its specific function while maintaining manufacturing simplicity through modular production and assembly.
Solution Approach 2:
Each wall component serves multiple purposes: the air outlet passage wall guides air and provides structural support, the air shield wall prevents dew condensation while maintaining air flow, and the back surface provides structural integrity. This multi-functionality allows the segmented design to achieve both manufacturing simplicity and effective dew condensation prevention.
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 prevents dew condensation on the back surface of the indoor unit during cooling, reducing the need for additional water droplet prevention units and simplifying the design, while also providing a cost-effective and resource-efficient solution.
Implementation Method 1
a space between the air outlet passage wall member (21) and the installation member (22) to prevent dew condensation by maintaining a heat insulation effect and reducing temperature transfer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An indoor unit 1 of an air conditioning device which is installed on a wall surface of a room includes an air sending fan 5 which sends room air from an air inlet 2 disposed at an upper part to an air outlet 3 disposed at a lower part of a front side; heat exchangers 4a, 4b disposed at the upstream side of the air sending fan 5; and a back case 11 which is located close to the wall surface with respect to the air sending fan 5 and supports the heat exchangers 4a, 4b, wherein the back case 11 is composed of an air outlet passage wall member 21 which forms an air outlet passage 6 for air blown out from the air sending fan 5 and an installation member 22 which is located on a back side of the air outlet passage wall member 21 and is mounted on an installation plate 9 which is fixed on the wall surface with the air outlet passage wall member 21 and the installation member 22 being arranged in parallel in the front and back direction, and a first space S is formed between a back surface of an air outlet passage wall 21 d of the air outlet passage wall member 21 and the installation member 22.