Refrigeration air wall apparatus and data center

A refrigeration air wall apparatus at least comprising a heat exchange unit, a dehumidification unit, and a fan unit, wherein the dehumidification unit is positioned between the heat exchange unit and the fan unit along an air flow direction, and the dehumidification unit is positioned in front of the heat exchange unit;

• the dehumidification unit comprises a first gas-to-liquid heat exchanger, a first liquid-to-liquid heat exchanger, and a first electric valve;
• the first gas-to-liquid heat exchanger is connected in series with an internal channel of the first liquid-to-liquid heat exchanger to form an internal circulation loop, the first electric valve being connected in series with the internal circulation loop;
• an external channel of the first liquid-to-liquid heat exchanger is connected in series with a first external cold source device to form an external circulation loop;
• and
• when the dehumidification unit is in operation, air sequentially exchanges heat through the heat exchange unit and the first gas-to-liquid heat exchanger to condense water vapor in the air.