Cooling assistance device and fan

A cooling assistance device, comprising:

• a first main body (100), wherein a first delivery channel (101) is provided inside the first main body (100), and a first delivery opening (102) in communication with the first delivery channel (101) is provided on one side of the first main body (100);
• and
• a second main body (200), wherein a second delivery channel (201) is provided inside the second main body (200), and a second delivery opening (202) in communication with the second delivery channel (201) is provided on one side of the second main body (200);
• wherein the first delivery channel (101) is configured to deliver compressed airflow to the first delivery opening (102), and wherein, when the compressed airflow flows out from the first delivery opening (102), a negative pressure region is formed at the second delivery opening (202) such that water flow inside the second delivery channel (201) flows out from the second delivery opening (202) and is impinged to form mist by the compressed airflow flowing out of the first delivery opening;
• wherein an end portion of the second main body (200) is located in front of the first delivery opening (102), the end portion of the second main body (200) is in a conical shape with a diameter that gradually decreases along a direction of the water flow, and a portion of the second delivery channel (201) corresponding to the end portion of the second main body (200) is in a conical shape with a diameter that gradually decreases along the direction of the water flow.