HOT WATER STORAGE TANK UNIT, HOT WATER STORAGE-TYPE WATER HEATER, AND METHOD FOR INSTALLING ALTERNATIVE TEMPERATURE SENSOR IN HOT WATER STORAGE UNIT

摘要

In hot water storage units of conventional hot water storage-type water heaters, a takeout portion is formed in a heat insulating material, and a defective temperature sensor can be replaced from the takeout portion. However, if the takeout portion is provided, a heat leak occurs therefrom, and therefore the provision of the takeout portion is undesirable in terms of heat insulation. The purpose of the present invention is to provide a hot water storage-type water heater which achieves both a heat insulating property and maintainability.To achieve this purpose, this hot water storage unit comprises a hot water storage tank that stores hot water, a temperature sensor provided outside the hot water storage tank, a case that surrounds the hot water storage tank, and a foam heat insulating material filled between the hot water storage tank and the case, and bonding force between the hot water storage tank and the foam heat insulating material in the vicinity of the temperature sensor is made weaker than bonding force between the hot water storage tank and the foam heat insulating material outside the vicinity of the temperature sensor.