Outdoor Heat Exchanger Flow Control for Air Conditioner Heating
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Solution Overview
Problem
Conventional air conditioners face inefficiencies in heating and cooling operations due to limitations in refrigerant flow management and heat exchange processes, which affect performance and energy efficiency.
Innovation Solution
The air conditioner design incorporates a dual heat exchanger system with a pass variable tube and valve, allowing for controlled refrigerant flow between heat exchange parts, and electronic expansion valves in both outdoor and indoor units to optimize refrigerant distribution and pressure for enhanced heating and cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional single heat exchanger system is used, then the device complexity is low, but the heating and cooling efficiency is insufficient due to limited refrigerant flow management
Solution Approach 1:
The outdoor heat exchanger is divided into multiple independent heat exchange parts, each with its own expansion part and flow control. This segmentation allows independent optimization of refrigerant flow in each section, improving overall heat exchange efficiency while maintaining manageable system complexity through modular design.
Solution Approach 2:
The system incorporates flow control valves and pass variable tubes that dynamically adjust refrigerant flow distribution based on operating conditions. This dynamic control optimizes heat exchange efficiency for different heating and cooling demands, resolving the contradiction between improved productivity and increased device complexity.
2Productivity
If refrigerant flow is increased to improve heat exchange, then the heating and cooling performance improves, but the pressure loss increases
Solution Approach 1:
Each heat exchange part is equipped with its own expansion part and flow control mechanism, allowing local optimization of refrigerant flow characteristics. This ensures that each section operates at optimal flow rates for maximum heat exchange efficiency while minimizing pressure losses through locally adapted flow management.
Solution Approach 2:
Expansion parts and flow control valves act as intermediaries between the refrigerant supply and heat exchange parts. These components regulate refrigerant flow to achieve optimal heat exchange performance while controlling pressure drops, effectively mediating between the conflicting requirements of high flow rate and low pressure loss.
3Loss of energy
If electronic expansion valves are added to optimize refrigerant distribution, then the energy efficiency improves, but the device complexity increases
Solution Approach 1:
The flow control valves and expansion parts are designed to serve multiple functions: refrigerant flow regulation, pressure control, and heat exchange optimization. This multi-functionality reduces the need for separate dedicated components, thereby improving energy efficiency without proportionally increasing device complexity.
4Productivity
If the heat exchange area is increased to improve performance, then the heating and cooling capacity increases, but the device complexity and space requirements increase
Solution Approach 1:
The heat exchanger system is segmented into multiple modular heat exchange parts that can be independently configured and optimized. This segmentation allows the system to achieve large total heat exchange area through parallel modular units rather than a single complex structure, improving capacity while maintaining manageable complexity.
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 configuration improves heating and cooling efficiency by increasing refrigerant flow and heat exchange time and area, reducing pressure loss, and optimizing refrigerant distribution, resulting in better performance and energy efficiency.
Implementation Method 1
outdoor expansion parts that reduce pressure of the refrigerant
Implementation Method 2
outdoor heat exchanger including heat exchange parts
Data Source
AI summary
An air conditioner is provided. The air conditioner may include at least one indoor device and an outdoor device connected to the at least one indoor device. The outdoor device may include an outdoor heat exchanger including a plurality of heat exchange parts, a plurality of outdoor expansion parts corresponding to the plurality of heat exchange parts, a pass variable tube that varies refrigerant flow in the outdoor heat exchanger, and a pass variable valve provided in the pass variable tube. The heat exchange parts may include a first heat exchange part. The first heat exchange part may be connected to a manifold that distributes refrigerant flow in a heating operation. The manifold may be connected to a plurality of capillaries connected to the first outdoor expansion part. The pass variable tube may be connected to the manifold.