Air Conditioner Nested Partition Wall Design to Reduce Noise Leakage
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Solution Overview
Problem
Existing air conditioners with partition walls in PTAC systems face challenges in providing sufficient thermal insulation and sound insulation, leading to noise leakage from outdoor to indoor spaces due to thin partition walls and gaps around drain pans.
Innovation Solution
An air conditioner design featuring a sound insulation wall surrounding the outdoor unit's internal space, which is isolated from the indoor space, combined with a separate type configuration that allows for efficient heat exchange and noise prevention, including a sliding bottom plate for easy installation and maintenance, and a heater to prevent defrost-water freezing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a thin partition wall is used to prevent interference with internal parts disposition, then device complexity is reduced, but sound insulation performance deteriorates
Solution Approach 1:
The patent implements a nested structure where the drain pan is positioned within the partition wall assembly. The partition wall contains an internal cavity that houses the drain pan, creating a multi-layered configuration. This nesting allows the partition wall to maintain its structural integrity and thickness for sound insulation while accommodating the drain pan functionally within its structure, preventing noise leakage without excessive complexity.
Solution Approach 2:
The partition wall is constructed as a composite structure combining multiple functional layers: an outer wall portion for structural support, an internal cavity for sound insulation and thermal barrier, and an integrated drain pan for water management. This composite design achieves both sound insulation performance and functional requirements without requiring a excessively thick single-layer wall.
2Ease of manufacture
If a thin partition wall is used, then manufacturing cost is reduced, but thermal insulation performance deteriorates
Solution Approach 1:
The drain pan is nested within the partition wall structure, creating an air-filled cavity between the outer wall and the pan. This nested configuration provides thermal insulation through the air gap while maintaining a relatively thin overall partition wall thickness that remains economical to manufacture.
Solution Approach 2:
The air cavity within the partition wall acts as an intermediary thermal barrier between the indoor and outdoor spaces. This intermediate layer provides thermal insulation without requiring thick solid material, reducing manufacturing complexity while improving thermal performance.
3Ease of operation
If a gap is formed between the drain pan and partition wall for drain water guidance, then ease of operation is improved, but sound insulation performance deteriorates
Solution Approach 1:
The partition wall is segmented into distinct functional zones: an upper sealed portion for sound insulation and a lower drainage portion with controlled gaps. The drain pan is positioned to create specific gap locations that allow drain water to flow while maintaining acoustic sealing in critical areas. This segmentation enables simultaneous achievement of drainage function and noise prevention.
Solution Approach 2:
The partition wall exhibits different structural qualities at different locations: the upper portion maintains continuous sealing for sound insulation, while the lower portion near the drain pan includes localized gaps for water flow. This local differentiation allows the structure to fulfill multiple functions - acoustic isolation where needed and fluid passage where required - without compromising overall performance.
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 solution effectively prevents noise from entering the indoor space while maintaining efficient heat exchange and reducing energy consumption by using sound insulation materials and a heater to manage defrost-water, ensuring a quieter indoor environment.
Implementation Method 1
the internal space that is open to the outdoor space, is surrounded by a sound insulation wall and is isolated from the indoor space
Implementation Method 2
The outdoor unit exchanges heat between the outside air entering the internal space and a refrigerant
Implementation Method 3
a heater to prevent defrost-water freezing
Data Source
AI summary
An air conditioner capable of satisfactorily preventing noise from entering an indoor space includes: an indoor unit that is fixed to a wall surface of an indoor space and houses an indoor heat exchanger; and an outdoor unit that houses an outdoor heat exchanger connected to a refrigerant circuit that includes the indoor heat exchanger. The outdoor unit includes an outside casing that is fitted into an opening formed in a building wall partitioning an outdoor space and the indoor space from each other and defines an internal space that is open to the outdoor space and isolated from the indoor space by being surrounded by a sound insulation wall, and an inside casing that is disposed in the internal space and houses the outdoor heat exchanger.