Heating device, sanitary water supply device, and sanitary cleaning device

A heating device, comprising:

• a main body, and
• one or more ceramic heating plates, wherein:
• the main body comprises a heating cavity,
• the one or more ceramic heating plates are disposed in the heating cavity to define a heating channel within the heating cavity,
• a first end of the heating channel has a first water inlet,
• a second end of the heating channel has a first water outlet,
• the one or more ceramic heating plates comprise a first heating surface and a second heating surface which face away from each other,
• a flow direction of cleaning water in the heating channel is along the first heating surface and the second heating surface in sequence,
• the main body is a water tank,
• the water tank comprises a water storage cavity that is configured to receive the cleaning water,
• the heating cavity is located at a top of the water tank,
• the water tank comprises a water pumping pipe,
• a first end of the water pumping pipe is in communication with the first water inlet of the heating channel, and
• a second end of the water pumping pipe extends into the water storage cavity.