Ceiling embedded-type air conditioner

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Solution Overview

Problem

Existing ceiling embedded air-conditioners face challenges in facilitating the opening and closing of suction grilles due to space constraints, leading to degraded design and increased weight, especially when the grille expands near the blow port.

Innovation Solution

A ceiling embedded air-conditioner design featuring a suction grille with a dummy grille extending adjacent to the blow port, coupled through a hinge mechanism, reduces weight and improves operability by allowing the suction grille to rotate and detach easily.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If the suction grille expands to the vicinity of the blow port to improve design, then the aesthetic appeal is improved, but the weight of the suction grille increases

Engineering Contradiction:
Improveaesthetic appealVSAvoidweight of suction grille
Core Design Contradiction:
ShapeVSWeight of moving object

Solution Approach 1:

The suction grille is divided into multiple sections that can be detached and removed. This segmentation allows the grille to achieve a large expanded shape for aesthetic appeal when installed, while the individual sections can be easily removed to reduce weight during maintenance or when not in use.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The suction grille is designed with detachable sections that can be dynamically assembled and disassembled. This dynamic configuration allows the grille to transition between a complete large-scale configuration for aesthetic purposes and a reduced configuration with removed sections for weight reduction and maintenance accessibility.

Inventive Principle:
Principle #15Dynamics

2Shape

If the suction grille expands to the vicinity of the blow port, then the design is improved, but the space for hinge arrangement becomes insufficient

Engineering Contradiction:
ImprovedesignVSAvoidhinge arrangement space
Core Design Contradiction:
ShapeVSDevice complexity

Solution Approach 1:

By segmenting the suction grille into detachable sections, the hinge mechanism only needs to accommodate smaller individual sections rather than a large entire grille. This reduces the space required for hinge arrangement while still allowing the grille to expand to the vicinity of the blow port when assembled.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The detachable sections act as intermediaries that can be easily connected and disconnected. This intermediary design simplifies the hinge arrangement by breaking down the complex motion of a large grille into simpler motions of smaller sections, requiring less space for the hinge mechanism.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Shape

If the suction grille expands to the vicinity of the blow port, then the design is improved, but the operability for maintenance becomes difficult

Engineering Contradiction:
ImprovedesignVSAvoidmaintenance accessibility
Core Design Contradiction:
ShapeVSEase of operation

Solution Approach 1:

The suction grille is segmented into detachable sections that can be individually removed. This segmentation maintains the aesthetic appeal of a large expanded grille when installed, while allowing easy removal of individual sections for maintenance access to the blow port and internal components.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The dynamic detachable design allows the grille to transition from a fixed large configuration that improves design to a partially removed configuration that enhances maintenance accessibility. The sections can be quickly detached without complex tools or procedures.

Inventive Principle:
Principle #15Dynamics

4Shape

If the suction grille weight increases due to expansion, then the aesthetic appeal is improved, but the motor output becomes insufficient

Engineering Contradiction:
Improveaesthetic appealVSAvoidmotor output
Core Design Contradiction:
ShapeVSPower

Solution Approach 1:

By dividing the suction grille into detachable sections, the system can achieve the aesthetic appeal of a large expanded grille when all sections are installed, while allowing individual sections to be removed to reduce the total weight that the motor needs to handle during operation and maintenance.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The dynamic detachable design allows the system to optimize between aesthetic appeal (with all sections installed) and motor performance (with sections removed). The motor only needs to handle the weight of individual sections during assembly/disassembly rather than the entire large grille, making the motor output sufficient.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP4148336B1Ceiling embedded-type air conditioner
Publication Date: 2025.12.31 HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
  • EP4148336B1 patent drawingFigure 1
  • EP4148336B1 patent drawingFigure 2
  • EP4148336B1 patent drawingFigure 3

AI summary

Provided is a ceiling embedded air-conditioner. The ceiling embedded air-conditioner of the present invention includes an indoor device 100 having a fan 105, a fan motor 106, and a heat exchanger 103, and in the indoor device 100, includes a decorative panel 107 attached facing an air-conditioning space and a grille 109 attached to the decorative panel 107. The grille 109 extends to a position adjacent to a blow port 108 formed at the decorative panel 107, and at least at one end portion of the grille 109, includes a dummy grille 109a formed adjacent to the blow port 108 separately from the grille 109.