Heat exchange device and heat exchange system

A heat exchange system, comprising:

• an accommodation room;
• a heat source;
• and
• a heat exchange device comprising:
• a housing;
• a partition plate dividing space inside the housing into an internal circulation cavity and an external circulation cavity, wherein the internal circulation cavity is configured to be communicated with an indoor environment, and the external circulation cavity is configured to be communicated with an outdoor environment;
• an evaporator located in the internal circulation cavity;
• and
• a compressor located in the internal circulation cavity, wherein a first valve group is disposed between an inlet of the compressor and an outlet of the evaporator;
• and
• wherein the heat exchange device has a first heat exchange mode, when the first heat exchange mode is used for a heat exchange, the outlet of the evaporator is communicated with the inlet of the compressor by using the first valve group;
• wherein the heat source is located in the accommodation room, the internal circulation cavity in the heat exchange device is communicated with the accommodation room, and the heat exchange device is configured to dissipate heat for the heat source;
• and
• wherein the heat exchange device further has a second heat exchange mode, and the heat exchange device further comprises a condenser, wherein the condenser is located in the external circulation cavity, the first valve group is further located between the inlet of the condenser and the outlet of the evaporator;
• and
• when the second heat exchange mode is used for the heat exchange, the outlet of the evaporator is communicated with the inlet of the condenser by using the first valve group, such that a heat exchange working medium inside the evaporator flows to the condenser after being heated.