| 摘要 |
<p>An energy usage display unit for displaying energy usage of gas used for a water heater, water used for the water heater or electricity used in housing where the water heater is set, comprising:
a clock section for having a clock and calendar function;
a counting section for counting usage of gas, water or electricity;
a memory section for storing a count value of usage counted by the counting section retroactive to past by a predetermined number with a predetermined time unit;
a counting control section for writing the count value of usage from the counting section to the memory section at predetermined time;
a display control section for reading one or both of the count value of the counting section and a stored value in the memory section to prepare display data of usage, in accordance with a period unit required by a user; and
a display section for displaying usage based on the display data prepared by the display control section.</p> |
