Hot water supply apparatus

Abstract

According to one embodiment, a hot water supply apparatus calculates a value representing an ordinary index for the hot water usage of each hot water destination, determines hot water supply whose value is less than a threshold as hot water supply of low ordinary, and determines hot water supply whose value is not less than the threshold as hot water supply of high ordinary. The apparatus also calculates a first boiling-up amount for the hot water supply determined as the hot water supply of low ordinary, and calculates a second boiling-up amount for the hot water supply determined as the hot water supply of high ordinary.

1 . A hot water supply apparatus comprising:
 a first calculation device that calculates a value representing an ordinary index for a hot water usage of each hot water destination, determines hot water supply whose value is less than a threshold as hot water supply of low ordinary, and determines hot water supply whose value is not less than the threshold as hot water supply of high ordinary; and   a second calculation device that calculates a first boiling-up amount for the hot water supply determined as the hot water supply of low ordinary, and calculates a second boiling-up amount for the hot water supply determined as the hot water supply of high ordinary.   
     
     
         2 . The apparatus according to  claim 1 , further comprising:
 a plurality of motion sensors installed in different places to detect existence of a person;   a hot water supply amount sensor that measures the hot water usage; and   a classification device that determines a hot water destination corresponding to a behavior of a person estimated based on an installation place where the motion sensor has reacted, and classifies the hot water usage as a hot water usage of each hot water destination.   
     
     
         3 . The apparatus according to  claim 1 , further comprising a boiling device that performs boiling-up in the first boiling-up amount and the second boiling-up amount. 
     
     
         4 . The apparatus according to  claim 1 , wherein the first calculation device comprises:
 a storage unit that stores an integrated amount of the hot water usages for each hot water destination;   a database that stores a standard hot water supply model representing a ratio of the number of days the integrated amount has reached a specific amount within a predetermined period, an average of reach times the specific amount has been reached, and a standard deviation of the reach times; and   a probability calculation unit that calculates, as a value representing the ordinary index, a product of the ratio and a probability based on a cumulative distribution function at a specific time in a normal distribution of the average and the standard deviation.