Heat exchanger and preparation method thereof

The invention discloses a heat exchanger and a preparation method thereof.The preparation method comprises the steps that fiber paper is bonded to the surfaces of a plurality of fins respectively, and a plurality of bonded fins are obtained; the multiple bonded fins are subjected to pipe penetrating and pipe expanding treatment, and multiple formed fins are obtained; the multiple formed fins are assembled, and the heat exchanger to be machined is obtained; soaking the heat exchanger to be processed into a sodium silicate solution for a certain time, and then drying to obtain a primary processing heat exchanger; the primary processing heat exchanger is soaked in an acid solution for a certain time and then dried, and the adsorption coating type heat exchanger is obtained; according to the preparation method disclosed by the invention, an in-situ synthesis method is adopted, the coating type heat exchanger can be efficiently and rapidly prepared, and the prepared adsorption coating has the advantages of high un