Driving part of warm air heater and warm air heater

A warm air heater, comprising:

• a fan,
• an air duct,
• a heating part disposed in the air duct, and
• a driving part, comprising:
• a driving circuit board disposed in the air duct and disposed at an upstream of the heating part or leveled with the heating part;
• a silicon-controlled element disposed on the driving circuit board,
• wherein the driving circuit board is disposed at an upstream of the heating part or leveled with the heating part relative to an airflow direction in the air duct,
• wherein the air duct includes a first assembly and a second assembly, and
• wherein a connecting portion of one of the first assembly and the second assembly comprises a groove and a connecting portion of the other of the first assembly and the second assembly comprises teeth, and the teeth are engaged with the groove.

A toilet comprising:

• a warm air heater including:
• a driving circuit board configured to be disposed in an air duct of the warm air heater and configured to be disposed at an upstream of a heating part of the warm air heater or leveled with the heating part of the warm air heater;
• a silicon-controlled element disposed on the driving circuit board,
• wherein the driving circuit board is disposed at an upstream of the heating part of the warm air heater or leveled with the heating part of the warm air heater relative to an airflow direction in the air duct,
• wherein the air duct includes a first assembly and a second assembly, and
• wherein a connecting portion of one of the first assembly and the second assembly comprises a groove and a connecting portion of the other of the first assembly and the second assembly comprises teeth, and the teeth are engaged with the groove.