Research on Circuit Optimization of Small-Diameter Outdoor Heat Exchanger for Room Air Conditioner

doi:10.7652/xjtuxb202405017

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Research on Circuit Optimization of Small-Diameter Outdoor Heat Exchanger for Room Air Conditioner

更新时间：2025-07-28

- Research on Circuit Optimization of Small-Diameter Outdoor Heat Exchanger for Room Air Conditioner
- Vol. 58, Issue 5, Pages: 179-189(2024)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 海信(广东)空调有限公司, , ),广东,江门,529000
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202405017
  CLC： TB69
- Online First：10 May 2024，
  
  Published：2024
- 稿件说明：
移动端阅览
Research on Circuit Optimization of Small-Diameter Outdoor Heat Exchanger for Room Air Conditioner[J]. 2024, 58(5): 179-189.
DOI：

Research on Circuit Optimization of Small-Diameter Outdoor Heat Exchanger for Room Air Conditioner[J]. 2024, 58(5): 179-189. DOI： 10.7652/xjtuxb202405017.

摘要

随着空调器的快速发展和国际铜价的持续升高

制冷空调行业采用的换热器在向着小体积、低成本发展的过程中往往面临着性能衰减的技术瓶颈。为突破此瓶颈

以一款冷暖型房间空调器翅片管式室外换热器为研究对象

将其换热管外径由7 mm减小至5 mm并在此基础上优化其流路

最终实现Φ5 mm换热器性能达到初始样机水平并有效降低换热器成本。首先

分别在5种标准工况下测试初始样机性能; 然后

利用CoilDesigner软件来分析小管径化对换热器性能的影响

仿真结果表明

在不改变流路布置的情况下

Φ5 mm换热器的换热能力略有提升

但制冷剂侧压降增大4～7倍; 进一步地

有针对性地设计了5种流路布置方案来探究分路数、分路汇合位置等因素对换热器传热及压降特性的影响规律

总结了小管径翅片管式换热器流路优化的思路

并设计了3种Φ5 mm管径室外换热器流路优化方案。仿真评估3种方案的可行性后制作样机进行性能测试

实验结果表明:方案(3)性能与原换热器相当

同时其材料成本可降低34.6%。

Abstract

With rapid advancements in air conditioners and increasing international copper prices

the heat exchangers used in the refrigeration and air conditioning industry frequently face technical challenges that hinder performance degradation as efforts focus on compact size and cost efficiency. In response

a study is conducted on a dual-mode room air conditioner with a finned-tube outdoor heat exchanger. The outer diameter of the heat exchange tubes is reduced from 7 mm to 5 mm alongside the circuit optimization. The goal is to achieve the performance of the Φ5 mm heat exchanger at the level of the initial prototype and effectively reduce the cost of the heat exchanger. Firstly

the performance test of the original prototype is carried out across five standard operating conditions. Subsequently

CoilDesigner is utilized to assess the impact of tube diameter reduction on the heat exchanger's performance. Simulation results indicate a minor improvement in the heat transfer capacity of the Φ5 mm heat exchanger without any circuit alterations. However

the refrigerant pressure drop increases by 4—7 times. Furthermore

five targeted circuit schemes are designed to examine the impact of factors such as the number of circuits and confluence locations of circuits on the heat transfer and pressure drop characteristics of the heat exchanger. The study summarizes an optimization approach for the circuit of small-diameter finned-tube heat exchangers. Three optimization schemes are developed for the Φ5 mm outdoor heat exchanger. After simulating and evaluating the feasibility of these three schemes

prototypes are generated for performance testing. The experimental results reveal that scheme(3)performs on par with the original heat exchanger while concurrently reducing material costs by 34.6%.

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references

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