Ceiling installation type air conditioner
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Solution Overview
Problem
Conventional ceiling installation type air conditioners with inclined flat plate heat exchangers suffer from wasted space, increased depth dimension, and varying air volume, leading to inefficiencies in heat exchange performance.
Innovation Solution
The air conditioner features a heat exchanger with a trapezoidal shape formed by three sections, each with a unique inclination and fin arrangement, optimizing air flow and heat transfer by ensuring uniform air distribution and minimizing space while maintaining high heat exchange efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heat exchanger is disposed in the heat exchange chamber so as to be inclined, then the air can be received efficiently and the height dimension is minimized, but much wasted space is generated inside the heat exchange chamber causing increase in depth dimension
Solution Approach 1:
The heat exchanger is configured with plate-shaped fins that have a specific geometric arrangement transforming the spatial utilization. By optimizing the inclination angle and fin orientation, the design converts wasted three-dimensional space into effective heat exchange surface area, maintaining compact depth while preserving thermal performance.
2Temperature
If the heat exchanger is disposed in the heat exchange chamber so as to be inclined, then the height dimension is minimized, but the outer dimension of the heat exchange chamber increases in proportion to capacity
Solution Approach 1:
The plate-shaped fins are designed with non-uniform distribution and varying inclination angles across different sections of the heat exchanger. This local optimization allows efficient heat exchange in high-velocity regions while reducing space requirements in lower-priority areas, breaking the linear relationship between capacity and chamber volume.
3Temperature
If the heat exchanger is disposed in the heat exchange chamber so as to be inclined, then the height dimension is minimized, but the distance from the blower greatly differs between the front end portion and the rear end portion causing variation in air volume
Solution Approach 1:
The plate-shaped fins are arranged with asymmetric inclination angles relative to the blower position. The front section has a different angle than the rear section, creating a gradient that compensates for the varying distance from the blower. This asymmetric configuration ensures uniform air distribution across the heat exchanger surface despite the inclined overall structure.
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
This design results in a compact air conditioner with improved heat exchange performance, reduced manufacturing costs, and enhanced installability, while maintaining high heat exchange efficiency and reducing air leakage.
Implementation Method 1
The heat exchanger includes plural heat transfer tubes through which refrigerant flows and plural fins that are thermally connected to the heat transfer tubes
Data Source
Figure 1
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Figure 3
AI summary
To provide a ceiling installation type air conditioner that is compact and has a good heat exchange efficiency. This ceiling installation type air conditioner (1) is provided with: a blower chamber (3) having an air inlet (27); a heat exchanger chamber (4) having an air outlet (28); a partitioning plate (26) separating the blower chamber (3) and the heat exchanger chamber (4); a blower (5) accommodated in the blower chamber (3); and a heat exchanger (7) accommodated in the heat exchanger chamber (4). The blower chamber (3) and the heat exchanger chamber (4) are connected via the blowing device (5). The heat exchanger (7) has a first heat exchange section (7A), a second heat exchange section (7B), and a third heat exchange section (7C). The first heat exchange section (7A), the second heat exchange section (7B), and the third heat exchange section (7C) each have a plurality of plate- shaped fins (71) and a plurality of heat transfer tubes (72). The first heat exchange section (7A) to the third heat exchange section (7C) are disposed in a substantially convex shape with respect to the air outlet (28).