To solve the problem of non-uniform refrigerant distribution among multi-tubes of micro-channel heat exchangers (MCHXs), a novel embedded-clapboard distributor is presented in this study, in which the embedded clapboards have a spray hole to transform the irregular flow pattern of inlet refrigerant into a dispersed bubble flow, and to form a cyclic channel to maintain the regular layout of dispersed bubble flow. The design method for the distributor is illustrated, including the calculation method for the spray hole diameter deduced from the transition criteria of dispersed bubble flow at both the horizontal and the vertical installations, and the calculation method for the hydraulic diameter of cyclic channel deduced based on the Bernoulli Equation for the circulation of dispersed bubble flow. The validation of refrigerant distribution performance includes the comparison of two-phase flow pattern between the proposed distributor prototype and conventional distributor prototype manufactured with transparent material, and the test of distribution unevenness among the outlet tubes for these two types of distributor prototypes. The experimental results show that the embedded-clapboard distributor forms the regular dispersed bubble flow at all installation patterns, and the average unevenness of the proposed distributor at the vertical, the sloped and the horizontal installations is 42.5%, 45.9% and 41.4% lower than that of the conventional cylinder-type distributor, respectively.

为了解决制冷剂在多通道微通道换热器之间分布不均匀的问题，提出了一种新型的嵌入式隔板分配器，该隔板具有一个喷孔以改变不规则流动。入口制冷剂进入分散气泡流的方式，并形成一个循环通道，以保持分散气泡流的规则布局。举例说明了分配器的设计方法，包括根据水平和垂直装置的分散气泡流动的过渡准则推导出的喷孔直径的计算方法，以及基于此推导的循环通道水力直径的计算方法。 Bernoulli方程用于分散气泡流动的循环。制冷剂分配性能的验证包括比较拟议的分配器原型和使用透明材料制造的常规分配器原型之间的两相流型，并测试这两种类型的分配器原型的出口管之间的分配不均匀性。实验结果表明，嵌入式隔板分配器在所有安装方式下均形成规则的分散气泡流，建议的分配器在垂直，倾斜和水平安装位置的平均不均匀度比分别降低42.5％，45.9％和41.4％。分别是传统的圆柱型分配器。