Patent ID: 8381689
Filing Date: 2013-02-26
Classification: F24H

Abstract:
1. A method for examining water heater safety, wherein the water heater includes a water pipe, a combustor to heat the water pipe, a gas supply to supply the combustor gas, and an examining unit to sense water temperatures, comprising the steps of: setting a desired temperature; sensing a cold water temperature at an inlet of the water pipe and a flow rate of water; calculating a theoretical gas consumption for the combustor to heat water in the water pipe from the cold water temperature to the desired temperature in a predetermined time and the flow rate under an ideal condition; sensing a hot water temperature at an outlet of the water pipe; heating water in the water pipe until the theoretical gas consumption has run out; calculating a temperature ratio by dividing a temperature difference of the hot water temperature and the cold water temperature by a temperature difference of the desired temperature and the cold water temperature; and examining the temperature ratio to generate a signal when the temperature ratio is less than a value.