Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (05): 144-149.doi: 10.13475/j.fzxb.20180503306

• Machinery & Accessories • Previous Articles     Next Articles

Optimization of washing process and roller structure on drum washing machine

JI Minjie1, HUANG Bang1, YUE Xiaoli1, ZHONG Yi2, CHEN Huimin1()   

  1. 1. College of Mechanical Engineering, Donghua University, Shanghai 201620, China
    2. Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China
  • Received:2018-05-03 Revised:2019-01-03 Online:2019-05-15 Published:2019-05-21
  • Contact: CHEN Huimin E-mail:ch_huimin@dhu.edu.cn

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Abstract:

In order to study the influence of washing progress and the roller structure on washing quality when fabrics are rinsed on drum washing machine, three items describing the remains and distribution of dye solution on fabrics were defined firstly. A finite element model of washing region was built by Fluent, and the influences of different roller structures were analyzed. Considering remaining ratio of dyeing liquid, uniformity of dyeing liquid and washing area ratio comprehensively, evaluation function of washing quality was proposed. Using central composite design method, series of design points were obtained. Response curves and sensitivity values were achieved. It is shown that the influence of washing speed is the most significant reaching 68%. Finally, in order to improve the washing quality, washing process and roller structure were optimized. The result shows that the washing quality of evaluation function is increased by 16.1%.

Key words: washing quality, drum washing machine, washing process, roller structure, optimization

CLC Number: 

  • TS190.3

Fig.1

Different roll groove structures. (a)Round hole;(b)Square hole; (c)Slotted hole;(d)Hexagonal hole"

Fig.2

Unit model of washing region"

Tab.1

Influences of fabric element size on remaining ratio of dyeing liquid"

网格尺寸/
mm		 节点数 网格数 染液
残余率		 偏差/
%
0.6 22 708 436 436 0.381 —
0.5 24 768 524 507 0.371 2.62
0.4 28 899 606 883 0.357 3.77
0.3 36 768 749 047 0.349 2.24
0.2 49 769 820 116 0.342 2.01

Fig.3

Distribution of fabric dye solution ratio. (a)Round hole;(b)Square hole; (c)Slotted hole;(d)Hexagonal hole"

Tab.2

Washing quality on different roll grooves"

辊网孔型 染液残余率 染液均匀度 洗涤面积比
圆形孔 0.35 0.45 0.68
正方形孔 0.31 0.35 0.67
槽形孔 0.17 0.32 0.82
正六边形孔 0.30 0.39 0.69

Fig.4

Optimization procedure of processing parameters and roll groove structure"

Fig.5

Relationships between design variables and integrated washing value. (a)Response of washing speed;(b)Response of washing speed;(c)Response of roller's radius size"

Tab.3

Sensitivity values of design variables"

变量 灵敏度/%
染液残
余率		 均匀度 洗涤
面积比		 水洗质量
综合评价值
水洗速度 -73 -57 75 68
水洗时间 -56 -69 55 46
辊网槽形孔半径 12 -14 -11 -15
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