Ceiling-mounted air-conditioner indoor-unit system
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Solution Overview
Problem
Conventional partial-ceiling type air conditioners suffer from poor thermal comfort due to hot air floating above the active area, and they lack effective sealing to prevent insects and dust from entering, leading to low reliability.
Innovation Solution
A ceiling-type air-conditioner indoor unit system with a return air inlet on the side surface and a closeable air outlet on the bottom surface, featuring a movable air guide portion with adjustable outlets and a cross flow fan with a V-shaped evaporator, ensuring hot air is directed to the lowest room position and preventing foreign matter entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot air is laterally supplied in conventional units, then air circulation is achieved, but thermal comfort deteriorates because hot air floats above the active area and cannot reach people
Solution Approach 1:
The patent inverts the conventional air supply direction by supplying air downward instead of laterally. The air outlet is configured to discharge air in a downward direction, allowing hot air to reach the lower active area where people are located, rather than floating above them. This inversion of the air supply direction directly resolves the thermal comfort problem while maintaining effective air circulation.
2Reliability
If traditional air ports are used without closing mechanism, then installation is simple, but reliability deteriorates because insects and dust cannot be prevented from entering the unit
Solution Approach 1:
The patent applies a dynamic closing mechanism to the air outlet, where the air guide portion can move between an extended position (allowing air discharge) and a retracted position (closing the outlet). This dynamic structure prevents insects and dust from entering when the unit is not operating, while maintaining a relatively simple overall design that integrates the closing function into the existing air outlet structure.
3Productivity
If air outlets are always open for air circulation, then air conditioning performance is maintained, but harmful factors worsen as insects and dust continuously enter the unit
Solution Approach 1:
The patent implements periodic action through the movable air guide portion that alternates between open and closed states. During air conditioning operation, the air guide is extended to allow air circulation and maintain productivity. During non-operation, the air guide retracts to close the outlet, preventing harmful factors from entering. This periodic switching between open and closed states resolves the contradiction between maintaining air conditioning performance and preventing contamination.
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
Improves thermal comfort by directing hot air to the lowest room position, reduces unit size, saves space, and enhances reliability by preventing dust and insect entry when the unit is not in operation.
Implementation Method 1
The indoor unit may be provided with a cross flow fan, comprising a volute and a fan blade
Implementation Method 2
an evaporator may be provided at a return air inlet of an inner cavity of the indoor unit
Implementation Method 3
after hot air is laterally supplied, the hot air floats over an air-conditioning room by following a principle of thermal expansion
Data Source
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AI summary
The disclosure discloses a ceiling-type air-conditioner indoor unit system. An indoor unit (10) is provided in a ceiling (20). The system further includes: a return air inlet (30), provided on a side surface of the ceiling (20); and an air outlet (40), provided on a bottom surface of the ceiling (20). A closeable return air inlet apparatus (31) is provided at the return air inlet (30), and a closeable air outlet apparatus (41) is provided at the air outlet (40).