| CPC F24H 9/2021 (2013.01) [F24D 17/0036 (2013.01); F24D 17/02 (2013.01); F24D 19/1054 (2013.01); F24H 1/18 (2013.01); F24H 1/202 (2013.01); F24H 15/174 (2022.01); F24H 15/225 (2022.01); F24H 15/258 (2022.01); F24H 15/37 (2022.01); F24H 15/375 (2022.01); F24H 15/414 (2022.01); F24D 2200/123 (2013.01); F24D 2200/32 (2013.01); F24H 15/128 (2022.01); F24H 15/136 (2022.01); F24H 15/281 (2022.01); F24H 2250/02 (2013.01)] | 16 Claims |
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1. A water heater comprising:
a storage tank configured to store water;
a plurality of first temperature sensors including a plurality of upper temperature sensors and a plurality of lower temperature sensors below the upper temperature sensors configured to sense a temperature of the water in the storage tank, wherein the plurality of upper temperature sensors are disposed in an upper region of the storage tank and the plurality of lower temperature sensors are disposed in a lower region of the storage tank below the upper region of the storage tank;
a second temperature sensor configured to sense a temperature outside of the water heater;
a first heat exchanger corresponding to a plurality of heaters disposed in the storage tank configured to heat the water;
a second heat exchanger corresponding to a heat pump system configured to heat the water; and
a controller configured to heat the water by controlling at least one of the first heat exchanger or the second heat exchanger based on the temperature sensed by the second temperature sensor and a set water temperature,
wherein different weights are applied to the plurality of upper temperature sensors considering an order adjacent to a water outlet pipe among the plurality of upper temperature sensors, and the temperature of the water in the storage tank is determined in consideration of the weight different weights,
wherein the plurality of heaters are provided in an order from an upper heater to a lower heater, the upper heater is disposed in the upper region of the storage tank, and the lower heater is disposed in the lower region of storage tank,
wherein the controller, until the temperature sensed by the plurality of first temperature sensors reaches the set water temperature when the temperature sensed by the second temperature sensor is determined to be equal to or less than a first temperature, is configured to control operation of the upper heater without operating the lower heater.
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