Hot water storage tank

A hot water storage tank comprising:

• a tank body that stores a liquid;
• a lower heat insulating material covering a lower part of the tank body;
• a middle heat insulating material connected to the lower heat insulating material, the middle heat insulating material covering a side part of the tank body;
• and
• an upper heat insulating material connected to the middle heat insulating material, the upper heat insulating material covering an upper part of the tank body,
• a lower end face of the upper heat insulating material and an upper end face of the middle heat insulating material being inclined downward from insides toward outsides,
• an outer diameter of the middle heat insulating material being larger than an outer diameter of the upper heat insulating material,
• the outer diameter of the middle heat insulating material being larger than an outer diameter of the lower heat insulating material, and
• a cylindrical portion provided between the tank body and the lower heat insulating material or the upper heat insulating material, wherein
• the tank body has an ejection port connected to a pipe through which a liquid flows,
• the cylindrical portion has an opening passing through in an up-down direction, the opening facing the ejection port, and is disposed to surround the ejection port, and
• the cylindrical portion is formed separately from the lower heat insulating material and the upper heat insulating material.

A hot water storage tank comprising:

• a tank body that stores a liquid;
• a lower heat insulating material covering a lower part of the tank body;
• a middle heat insulating material connected to the lower heat insulating material, the middle heat insulating material covering a side part of the tank body;
• and
• an upper heat insulating material connected to the middle heat insulating material, the upper heat insulating material covering an upper part of the tank body,
• a lower end face of the upper heat insulating material and an upper end face of the middle heat insulating material being inclined downward from insides toward outsides,
• an outer diameter of the middle heat insulating material being larger than an outer diameter of the upper heat insulating material,
• the outer diameter of the middle heat insulating material being larger than an outer diameter of the lower heat insulating material, and
• a cylindrical portion provided between the tank body and the lower heat insulating material or the upper heat insulating material, wherein
• the tank body has an ejection port connected to a pipe through which a liquid flows,
• the cylindrical portion has an opening passing through in an up-down direction, the opening facing the ejection port, and is disposed to surround the ejection port, and
• the cylindrical portion is made of a flexible material whose Young's modulus is smaller than a Young's modulus of a material for the lower heat insulating material, the middle heat insulating material, and the upper heat insulating material.