Drain Pan Access Panel for Air Conditioner Inspection

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Solution Overview

Problem

Existing air conditioners require onerous work for visual examination of the drain pan due to dirt accumulation on transparent inspection windows and necessitate detachment of the drain pan for water quality checks, which is labor-intensive.

Innovation Solution

An air conditioner design featuring a maintenance panel with a detachable lid member that allows visual examination of the drain pan and suction port without tools, enabling tool-free attachment and detachment for simplified water quality checks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a transparent inspection window is provided to the drain pan, then visual examination of the drain pan becomes possible, but dirt accumulation on the transparent plate member makes examination difficult

Engineering Contradiction:
Improvevisual examination of drain panVSAvoidexamination accuracy
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The invention extracts the examination function from the transparent inspection window by providing a separate opening part in the casing that allows direct visual access to the drain pan. This bypasses the transparent plate member that accumulates dirt, enabling reliable examination without being affected by dirt on the original inspection window.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The opening part in the casing serves as an intermediary access point that provides a clear line of sight to the drain pan. This intermediary structure allows examination without requiring the transparent plate member to remain clean, as the opening provides direct visual access around or beyond the inspection window area.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If the drain pan is detached for water quality examination, then thorough inspection is possible, but the work becomes onerous and labor-intensive

Engineering Contradiction:
Improvewater quality examination thoroughnessVSAvoidexamination labor
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The invention extracts only the necessary examination capability from the drain pan assembly by providing an opening part in the casing. This allows users to perform water quality examinations without detaching the entire drain pan, extracting only the visual access function while leaving the drain pan installed and functional.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The examination function is segmented from the drain pan detachment operation. The opening part in the casing provides a dedicated access path that separates the examination activity from the drain pan removal process, allowing independent access for inspection without affecting the drain pan's installation or requiring full disassembly.

Inventive Principle:
Principle #1Segmentation

3Ease of operation

If the opening part is provided in the casing, then visual examination without detachment is possible, but the opening may affect the structural integrity or aesthetics

Engineering Contradiction:
Improveaccessibility for examinationVSAvoidcasing structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The opening part in the casing serves multiple functions: it provides visual access to the drain pan for examination, allows natural light to illuminate the examination area, and can be integrated with the existing casing structure without requiring separate complex mechanisms. This multi-functionality reduces the need for additional components.

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

Solution Approach 2:

The opening part is strategically positioned and sized to provide sufficient examination access while minimizing impact on the overall casing structure. The opening can be located in areas where structural impact is minimal, and its size is optimized to provide adequate viewability without creating large structural weaknesses or aesthetic compromises.

Inventive Principle:
Principle #3Local quality

Data Source

PatentEP3415835B1Air conditioner
Publication Date: 2021.10.20 HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
  • EP3415835B1 patent drawingFigure 1
  • EP3415835B1 patent drawingFigure 2
  • EP3415835B1 patent drawingFigure 3

AI summary

In order to enable a drain pan to be visually checked for contamination without requiring a complicated operation, the present invention is configured so as to be equipped with: a housing; a drain pan provided inside the housing; a drain pump for pumping up drain water accumulated in the drain pan; an opening provided in a side surface of the housing; and a cover member attached to the opening and covering the opening. When the cover member is detached from the opening at least a portion of the drain pan can be viewed from the opening.