Outdoor Unit Heat Exchange Assembly for Compressor-Free Defrosting
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Solution Overview
Problem
Frequent compressor reversal in air conditioners for defrosting leads to reduced user experience and shortened service life due to decreased heat exchange efficiency and potential damage from frost formation on outdoor units.
Innovation Solution
A heat exchange system for outdoor air conditioner units that includes a control valve assembly and a heating assembly to manage coolant flow, allowing for high-temperature coolant delivery to fins during defrosting without frequent compressor reversal, utilizing a first circulation pipeline and a heating pipeline controlled by stop and reversing valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compressor is frequently reversed to enable defrosting, then the frost on the outdoor unit heat exchanger is removed, but the service life of the air conditioner is shortened and user experience is damaged
Solution Approach 1:
The patent divides the circulation system into two separate pipelines: a first circulation pipeline for normal heat exchange operation and a second circulation pipeline for defrosting operation. This segmentation allows the system to switch between heating and defrosting modes without reversing the compressor, thereby extending service life while effectively removing frost from the heat exchanger.
Solution Approach 2:
The patent introduces a second circulation pipeline as an intermediary pathway that enables defrosting through alternative coolant flow routing. By using this intermediate pipeline with a heating assembly, the system can achieve defrosting without the harmful effect of compressor reversal, thus protecting the compressor and extending service life.
2Productivity
If the compressor is reversed for defrosting, then the heat exchanger is defrosted, but the heating effect is influenced and compressor damage occurs
Solution Approach 1:
The circulation system is segmented into two independent pipelines: the first circulation pipeline maintains heating function while the second circulation pipeline performs defrosting. This segmentation enables simultaneous or sequential operation of heating and defrosting without interfering with each other, thus maintaining heating effect while achieving efficient defrosting without compressor reversal.
Solution Approach 2:
The defrosting function is achieved through the heating assembly heating the coolant in the second circulation pipeline, which then flows through the heat exchanger to melt frost. This self-service defrosting mechanism eliminates the need for compressor reversal, preventing compressor damage while maintaining effective defrosting capability.
3Device complexity
If a single circulation pipeline is used for both heating and defrosting, then the system structure is simple, but frequent compressor reversal is required
Solution Approach 1:
The circulation system is divided into two separate pipelines with distinct functions: the first circulation pipeline for heating and the second circulation pipeline for defrosting. Although this increases structural complexity compared to a single pipeline, it eliminates the need for compressor reversal, thereby significantly improving reliability and extending compressor service life.
Solution Approach 2:
The system dynamically switches between the first and second circulation pipelines based on operational requirements (heating or defrosting mode). This dynamic configuration allows the system to adapt to different operational states without reversing the compressor, thus protecting the compressor while maintaining operational flexibility.
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 system enhances defrosting efficiency while maintaining heating performance, reduces compressor wear, and extends the air conditioner's service life by providing a stable and efficient heat exchange process.
Implementation Method 1
a heating assembly connected with the heating pipeline and configured to heat a coolant in the heating pipeline before entering the fins
Implementation Method 2
high-temperature coolant flows through the heat exchanger of the outdoor unit
Implementation Method 3
the heat absorption temperature of a heat exchanger for an outdoor unit of an air conditioner is reduced, and fins of the heat exchanger for the outdoor unit of the air conditioner are frosted
Data Source
AI summary
A heat exchange system includes an outdoor unit heat exchange assembly, a first circulation pipeline, a control valve assembly, a heating pipeline and a heating assembly, wherein the outdoor heat exchange assembly includes a coolant heat radiation module and fins; the first circulation pipeline includes an output pipe, a connecting pipe and a return pipe; the output pipe communicates with an air conditioner indoor unit and the coolant heat radiation module; the connecting pipe communicates with the coolant heat radiation module and the fins; the return pipe communicates with the fins and the air conditioner indoor unit; the control valve assembly is connected with the output pipe; the heating pipeline communicates with the output pipe and the fins, communicates with the return pipe, and is also connected with the control valve assembly; and the heating assembly is connected with the heating pipeline.