On plate-fin heat exchanger internal logistics distribution study, based on the study of staggered head orifice-type structure on the plate-fin heat exchanger outlet flow and heat transfer. Through experiments and industrial basic head comparison showed that staggered plate-type head can significantly improve the heat exchanger outlet section of flow and temperature distribution uniformity. Re = 2 000 in the outlet of the heat flow distribution uniformity greatly decreased; while a larger number of cases, can be more improved remarkably uneven temperature distribution. An experimental system and content of experimental system using air as the working fluid experiment, arranged upstream. Experimental system shown in Figure 1, mainly by air circuit system and data acquisition system. Experimental study object is the result of modeling the structure of plants currently being used Kaifeng empty plate-fin heat exchanger and diversion body. In order to achieve the small cross-section flow and temperature measurement, the test piece is divided into 30 small flow cross-sectional area, as in [3], each cell is used as a channel, the channel can be a small flow and temperature measurement . To achieve head comparison of different experiments in which the main part of the heat exchanger for the hot end of the basic fixed head, and the cold end is removable head different structures. [4] According to the head of the basic calculations, the internal height in half head place to add a uniform hole with a baffle plate made of a header with the structure. Ideally, the hole area and the fluid flow rate through the holes can be achieved ∫ vdA = constant. So that the fluid reaches the head outlet J ago, has been evenly distributed, so as to improve internal logistics distribution head purpose. CLC: TK 124 Document code: plate-fin heat exchanger has a compact, high efficiency heat transfer, with the traditional shell and tube heat exchanger compared to the heat transfer efficiency of 20% _30%, the cost can be reduced by 50%, is now widely used in air separation, petrochemical, aerospace and other fields. However, due to plate-fin heat exchanger design, manufacture and heat caused by the irrational structure of internal logistics distribution and uneven temperature distribution, and its impact is plate-fin heat exchanger efficiency of the main factors. For logistics and distribution, the temperature distribution caused by factors affecting the performance of the heat exchanger, the literature [3] found that non-uniformity of flow distribution occurs mainly in the head part and deflector portion inhomogeneity, mainly coming from the head of caused by uneven flow, and thus research head structure on the plate-fin heat exchanger flow and heat transfer is important. Proposed and designed a staggered head orifice type structure, this paper mainly studies staggered head orifice head and industrial base of the heat exchanger internal logistics distribution and temperature distribution. Longwan Hongyu Metal Head Factory Add: Wenzhou City view golden sand town seven A Tel :0577 577 -86925750 -86925157 Fax Mobile: 13057722577 15355996788 Contact: Sun Shaodi URL: www.hyft.cn