Air conditioner
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Solution Overview
Problem
In air conditioners, the ventilation resistance of the flow path around the heat transfer tube in the condenser is not smaller than that around the heat transfer tube in the evaporator due to equal outside diameters, leading to inefficient airflow and energy consumption.
Innovation Solution
The air conditioner design features a condenser with a heat transfer tube having a smaller outside diameter than the evaporator, allowing for reduced ventilation resistance in the condenser's airflow path, which in turn reduces the energy required for airflow and enhances energy-saving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outside diameter of the heat transfer tube in the evaporator is equal to the outside diameter of the heat transfer tube in the condenser, then the manufacturing is simplified and cost is reduced, but the ventilation resistance of the condenser airflow path cannot be smaller than that of the evaporator airflow path
Solution Approach 1:
The patent applies local quality by assigning different outside diameters to heat transfer tubes in different components. Specifically, the evaporator heat transfer tube has a larger outside diameter (D1) while the condenser heat transfer tube has a smaller outside diameter (D2), where D1 > D2. This local differentiation optimizes the ventilation resistance characteristics of each component independently, allowing the condenser to have lower ventilation resistance while the evaporator maintains sufficient heat exchange area.
2Loss of energy
If the outside diameter of the heat transfer tube in the condenser is reduced, then the ventilation resistance of the condenser airflow path is reduced, but the heat transfer area may be reduced
Solution Approach 1:
The patent resolves this contradiction by applying local quality - differentiating the tube dimensions based on the specific requirements of each heat exchanger. The evaporator uses larger diameter tubes (D1) to maximize heat transfer area where condensation occurs, while the condenser uses smaller diameter tubes (D2) to minimize ventilation resistance where refrigerant is already condensed and requires less heat exchange area.
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 reduces the ventilation resistance around the condenser's heat transfer tube, lowering the energy consumption and improving the dehumidifying apparatus's efficiency by optimizing airflow and refrigerant flow, thereby providing high energy-saving performance and reducing the required amount of refrigerant.
Implementation Method 1
a condenser (3), a decompressor (4), and an evaporator (5)... a blower (6)... the blower is configured to blow air... heat transfer tube through which the refrigerant flows
Implementation Method 2
a condenser (3)... through which the refrigerant flows... refrigerant circuit has a compressor (2), a condenser (3), a decompressor (4), and an evaporator (5) and is configured to circulate refrigerant
Implementation Method 3
an evaporator (5)... through which the refrigerant flows... circulate refrigerant in order of the compressor (2), the condenser (3), the decompressor (4), and the evaporator (5)
Implementation Method 4
a blower (6)... the blower is configured to blow air... flow path of air that flows around the heat transfer tube
Data Source
AI summary
An air conditioner includes a casing, and a blower and a refrigerant circuit disposed in the casing. The blower is configured to blow air. The refrigerant circuit has a compressor, a condenser, a decompressor, and an evaporator and is configured to circulate refrigerant in order of the compressor, the condenser, the decompressor, and the evaporator. The condenser has a first heat transfer tube through which the refrigerant flows and which has a first outside diameter. The evaporator has a second heat transfer tube through which the refrigerant flows and which has a second outside diameter. The evaporator is disposed windward of the condenser. The first outside diameter of the first heat transfer tube of the condenser is smaller than the second outside diameter of the second heat transfer tube of the evaporator.