Heat exchanger core and heat exchanger based on bionic stacking three-dimensional configuration

Abstract

The invention discloses a heat exchanger core body based on bionic stacking three-dimensional configuration and a heat exchanger. The heat exchanger core body is formed by stacking a plurality of heatexchange units, each heat exchange unit comprises two layers of net-shaped plates, a plurality of grids are uniformly distributed on the opposite end faces of the net-shaped plate pieces, net rib nodes of the two layers of net-shaped plates are staggered with each other, and a plurality of flow passages and chambers communicating with each other are formed; and every two adjacent heat exchange units forms a cold side medium flow cavity and a hot side medium flow cavity. According to the heat exchanger core body, a plurality of micro cavities communicating with each other are formed in the medium flowing cavities to form a bionic bone marrow structure, and the bionic bone marrow structure has relatively large ratio surface area to volume, compared with a heat exchanger with an internal straight flow channel, the heat exchange power can be improved by 20% or more, and the weight of the heat exchanger is reduced by 20% or more; and the compactness of the heat exchanger is improved to be6 times or more of the compactness of a tube-shell heat exchanger, the heat exchanger can bear high pressure of about 20 MPa, has relatively high heat exchange efficiency under the condition that thehydraulic diameter is large, and is suitable for large heat flux density application scenes.

Description

technical field [0001] The invention belongs to the technical field of heat exchange equipment, and relates to a heat exchanger core and a heat exchanger based on a bionic stacked three-dimensional configuration. Background technique [0002] In order to solve the high heat flux heat dissipation problem in the aerospace field, it is necessary to design a lightweight and efficient heat exchanger. Currently available solutions are as follows: [0003] (1) Tube / shell heat exchanger: tube / shell heat exchanger is a widely used and mature heat exchanger in the industry. However, when it is applied in the aerospace field, due to its The compactness is not high, and the heat exchange capacity is limited, which often leads to problems of excessive volume or weight. This is limited by its own structural characteristics. In addition, in order to improve its compactness, the heat exchange area per unit volume can only be increased by continuously reducing the inner diameter of the tu...

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Problems solved by technology

[0005] (3) Micro-channel heat exchanger: The micro-channel heat exchanger improves the heat exchange capacity by increasing the number of channels and reducing the hydraulic diameter, but because the hydraulic diameter of the channel is too small, it also has coking and clogging for the fuel medium risks of

Due to the discontinuity and limited thickness of the transverse and longitudinal corrugations, the pressure that the corrugated plates can bear is limited, and the diffusion welding process is not suitable, resulting in poor compressive strength; the flow direction on both sides is limited, that is, it must be staggered flow , so that the setting of the medium inlet and outlet is limited; the number of plate layers in a heat exchange unit is limited (two layers), and the form of the constructed flow channel is limited, which makes it difficult to greatly increase the heat exchange power; the above factors make the application scene restricted. Larger limitations, especially in the aerospace field with high heat flux, it is difficult to apply

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