空调舒适风感及一种实现方案

空调制冷时的冷风直吹往往会造成人体不适,进而引起感冒等疾病,因此对于空调舒适风感的研究具有积极的现实意义。首先对市面上现有的防止空调冷风直吹的方案进行了分析总结,并阐述了其技术特征。同时,基于技术探讨和作者的自身认识,对一款已量产的分体挂壁空调内机进行了改造,主要是基于对导风板形状尺寸的更改,并使用fluent软件对更改方案进行了流场模拟分析,初步验证了改进后的方案在制冷模式、制热模式下均可以实现舒适风感的效果。

柜式空调出风方式对人体舒适性影响的研究

家用空调发展至今,传统的出风方式制冷时冷风直吹,制热时头热脚冷,人体舒适体验较差,已成为行业积弊。以柜式空调为例,采用CFD软件对一款具备上下冷暖出风且已量产的柜式空调,以中国人身高为实验参数,进行制冷和制热温度场模拟计算。通过观察冷风的扫风轨迹曲线图,发现实验柜机不会直吹到人,此外通过仿真空间的制冷垂直温差变化和温度均匀度分析,此柜机能够在30分钟内让室内温度降到舒适温度;同时将该款柜机与传统柜机进行热舒适性实验,通过分析实验数据,验证出上下同时出热风时垂直温差变化更小,整个空间的制热温度均匀度更高。综合仿真结果,上下冷热出风式柜机的制冷、制热舒适度效果最好。

Draft sensation distribution of air jet supply system in large space building in summer

To study the draft sensation distribution of an air jet supply system in a large space building in summer,experiments are conducted in a large laboratory.The temperature,velocity and draft sensation distributions at a nozzle height of 4 m in the occupied zone are obtained.Then,the numerical simulation under the test condition is carried out by the computational fluid dynamics（CFD）method.The calculation results of the indoor vertical temperature and the draft sensation distribution are validated by the test data.Simulations with different nozzle heights are conducted.The satisfactory air supply condition is determined by analyzing the draft sensations and the temperatures in the occupied zone under three conditions.The simulation results show that the optimal draft sensation distribution and the uniform temperature and velocity fields can be obtained at a nozzle height of 5 m.