Abstract: A drying and filtering device. The filtering and drying device comprises a bearing base body, an adsorption drying tube and a refrigerating tube. The bearing base body comprises an upper adsorption airflow cavity and an upper refrigerating airflow cavity located at an upper end of the bearing base body, and a lower adsorption airflow cavity and a lower refrigerating airflow cavity located at a lower end of the bearing base body. The adsorption drying tube is vertically arranged between the upper end and the lower end, and communicates with the upper adsorption airflow cavity and the lower adsorption airflow cavity. The refrigerating tube is vertically arranged between the upper end and the lower end, and communicates with the upper refrigerating airflow cavity and the lower refrigerating airflow cavity. The bearing base body further comprises an air intake guide cavity, and communicates with the refrigerating tube and the adsorption drying tube.

Abstract: A heat exchange device and a freeze dryer. The freeze dryer comprises a bearing device, and an evaporation device and a condensation device which are provided on the bearing device, at least one of the evaporation device and the condensation device comprising a structure of the heat exchange device. The heat exchange device is integrally molded by extrusion, and the heat exchange device is provided with at least one medium flow passage, a plurality of fins are formed on the outer periphery of the medium flow passage, and the fins being provided at intervals to form gaps allowing airflows to pass therethrough. The heat exchange device and the freeze dryer of the present disclosure can be designed to be smaller, reducing the volume, and facilitating miniaturization of products.

Abstract: A drying and filtering device used for drying and filtering compressed air comprises a housing (10) having a cavity (11), an upper cover (20) disposed on the roof of the housing (10), a lower cover (30) having a drainage port (31) disposed at the bottom of the housing (10), and a cooling tube (40) disposed in the housing (10). An air inlet (21) and an air outlet (22) are provided at two sides of the upper cover (20). The cavity (11) being in communication with the air inlet (21), the air outlet (22), and the drainage port (31) respectively. The cooling tube (40) is disposed in the cavity (11) and extends from a position near the upper cover (20) downward to the lower cover (30). Compressed air enters the cavity (11) from the air inlet (21) on the upper cover (20), and contacts the cooling tube (40).