Heat exchange module and cabinet

A heat exchange module, used in a cabinet, wherein the cabinet comprises a cabinet body, the cabinet body has a first space and a second space, and the second space has an air intake vent;

• and the heat exchange module comprises:
• a first air circulation system;
• and
• a second air circulation system configured to exchange heat with the first air circulation system, wherein both an air intake vent and an air exhaust vent of the first air circulation system are configured to be connected to the first space, and an air exhaust vent of the second air circulation system is connected to an external space, and an air intake vent of the second air circulation system is configured to be selectively connected to the external space and/or the second space;
• wherein the second air circulation system further comprises:
• an air supply assembly;
• a first air intake structure;
• a second air intake structure;
• and
• an air exhaust structure;
• and
• wherein both an air exhaust vent of the first air intake structure and an air exhaust vent of the second air intake structure are connected to an air intake vent of each air supply component;
• and
• a first switch is connected to the first air intake structure.