Heat dissipation cabinet and heat dissipation cabinet system

A cabinet system comprising:

• a cabinet and a heat generation device, wherein the heat generation device is located in the cabinet;
• and
• wherein the cabinet comprises:
• a housing;
• and
• a heat exchanger, wherein the heat exchanger is located in the housing and has a heat exchanger cavity, wherein:
• the heat generation device is located in the housing and has a device cavity;
• the heat generation device and the heat exchanger are arranged along a first direction;
• along a second direction, an air-in cavity is provided between an end of the heat generation device and the housing and an air-out cavity is provided between another end of the heat generation device and the housing;
• along a third direction, a first cavity is provided between an end of the heat generation device and the housing and a second cavity is provided between another end of the heat generation device and the housing, and along the third direction, a third cavity is provided between the end of the heat generation device and the housing and a fourth cavity is provided between the another end of the heat exchanger and the housing;
• after entering the air-in cavity, airflow flows through the device cavity, the air-out cavity, the first cavity, the third cavity, the heat exchanger cavity, and the fourth cavity, and enters the air-in cavity from the fourth cavity;
• and
• the heat exchanger performs heat exchange between external airflow and the airflow that enters the heat exchanger cavity through the third cavity.