Silencing Unit Drain Channel Layout to Prevent Cavity Liquid Buildup

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Solution Overview

Problem

Existing silencing devices fail to effectively drain liquids such as rainwater or lubricating oil, leading to a reduction or loss of silencing effect.

Innovation Solution

The silencing unit features a drain channel and cavity design where the bottom of the drain channel is flush with or higher than the cavity, allowing liquids to be drained while maintaining sound silencing functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a silencing device is used to perform silencing, then the silencing effect is improved, but liquid accumulation occurs inside the device causing the silencing effect to be reduced or lost

Engineering Contradiction:
Improvesilencing effectVSAvoidliquid accumulation
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The silencing device is segmented into functional zones: a soundproofing cavity for silencing and a separate drainage channel system for liquid removal. This segmentation allows the silencing function to be maintained while providing a dedicated pathway for liquid evacuation, preventing liquid accumulation from compromising the silencing effect.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The drainage function is extracted as a separate component from the soundproofing cavity. A drain outlet and drainage channel are provided to actively remove liquids from the cavity, extracting the harmful liquid accumulation aspect from the silencing system while preserving the core silencing function.

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of operation

If the drain outlet is arranged on the side wall of the main body, then liquid drainage is facilitated, but the structural complexity increases

Engineering Contradiction:
Improveliquid drainageVSAvoidstructural complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The drain outlet is merged with the side wall structure of the main body, integrating the drainage function into the existing structural framework. This combination allows liquid drainage to be facilitated without adding significant structural complexity, as the drain outlet utilizes the available side wall space and structural features.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The side wall structure serves multiple functions: it provides structural support for the soundproofing cavity and simultaneously houses the drain outlet for liquid drainage. This multi-functionality reduces the need for additional dedicated drainage structures, thereby limiting the increase in structural complexity while maintaining ease of liquid drainage.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

Ensures effective silencing by preventing liquid accumulation, thereby maintaining the silencing effect and facilitating easy liquid removal.

Implementation Method 1

the bottom of the cavity is not lower than the bottom of the drain channel

Methodology Applied
Scientific EffectGravity: Gravitation

Data Source

PatentUS20260016013A1Silencing unit and silencing structure
Publication Date: 2026.01.15 JOHNSON CONTROLS AIR CONDITIONING & REFRIGERATION (WUXI) CO LTD
  • US20260016013A1 patent drawing
  • US20260016013A1 patent drawing
  • US20260016013A1 patent drawing

AI summary

The present application discloses a silencing unit and a silencing structure. The silencing unit includes a main body and a neck. The main body is provided with a cavity and a liquid drain outlet, and the drain outlet is arranged on a side wall of the main body and communicates with the cavity. The neck is arranged on a side portion of the main body and connected to the main body, and the neck is provided with a drain channel. Wherein the drain channel communicates with the cavity through the drain outlet, and the bottom of the cavity is not lower than the bottom of the drain channel. The silencing unit of the present application can drain a liquid entering the cavity out of the cavity while silencing.