Air heating apparatus

Abstract

An air heating apparatus according to the present disclosure includes an expansion tank that stores water, a water heater that receives heat from a combustion gas generated by a combustion reaction and heats the water, a heating heat exchanger that receives the water heated by the water heater and exchanges heat between the water and air discharged for heating, a fan that delivers the air to the heating heat exchanger, a circulation supply flow path that is formed to connect the expansion tank, the water heater, and the heating heat exchanger and guides the water in the expansion tank via the water heater to the heating heat exchanger, a hot water tank in which hot water is stored, and a hot water heating flow path.

What is claimed is: 
     
         1 . An air heating apparatus comprising:
 an expansion tank configured to store water;   a water heater configured to receive heat from a combustion gas generated by a combustion reaction and heat the water;   a heating heat exchanger configured to receive the water heated by the water heater and exchange heat between the water and air discharged for heating;   a fan configured to deliver the air to the heating heat exchanger;   a circulation supply flow path formed to connect the expansion tank, the water heater, and the heating heat exchanger and configured to guide the water in the expansion tank via the water heater to the heating heat exchanger;   a hot water tank in which hot water is stored; and   a hot water heating flow path of which one end is connected to a first point that is a point positioned downstream of the water heater in the circulation supply flow path and the other end is connected to a second point positioned downstream of the first point in the circulation supply flow path and in which a heating area is disposed inside the hot water tank to heat the hot water in the hot water tank.   
     
     
         2 . The air heating apparatus of  claim 1 , further comprising:
 a valve part configured to open or close the hot water heating flow path and open or close a downstream side of the first point.   
     
     
         3 . The air heating apparatus of  claim 2 , further comprising:
 a controller electrically connected to the valve part and configured to control an operation of the valve part and control operations of the water heater and the fan.   
     
     
         4 . The air heating apparatus of  claim 3 , further comprising:
 a circulation pump disposed downstream of the expansion tank and upstream of the water heater in the circulation supply flow path and configured to pump the water in the circulation supply flow path,   wherein the controller controls an operation of the circulation pump.   
     
     
         5 . The air heating apparatus of  claim 4 , wherein, when a current mode corresponds to a heating mode in which heating of indoor air is required and does not correspond to a hot water mode in which use of the hot water is required,
 the controller controls the valve part to open the downstream side of the first point and close the hot water heating flow path.   
     
     
         6 . The air heating apparatus of  claim 5 , further comprising:
 a room temperature measurement device disposed in a room, electrically connected to the controller, and configured to transmit information on an acquired room temperature to the controller,   wherein the controller controls operations of the water heater, the fan, and the circulation pump based on a value obtained by comparing the room temperature acquired by the room temperature measurement device with a target room temperature.   
     
     
         7 . The air heating apparatus of  claim 5 , further comprising:
 a discharge duct formed to communicate with a room and configured to guide the air discharged from the fan to the room; and   a discharge air temperature measurement device disposed in the discharge duct and configured to measure a temperature of the air discharged from the fan,   wherein the controller controls operations of the water heater, the fan, and the circulation pump based on a value obtained by comparing the temperature of the air acquired by the discharge air temperature measurement device with a target discharge air temperature.   
     
     
         8 . The air heating apparatus of  claim 5 , further comprising:
 a suction duct formed to communicate with a room and configured to guide the indoor air to the fan; and   a suction air temperature measurement device disposed in the suction duct and configured to measure a temperature of the air suctioned from the room,   wherein the controller controls operations of the water heater, the fan, and the circulation pump based on a value obtained by comparing the temperature of the air acquired by the suction air temperature measurement device with a target suction air temperature.   
     
     
         9 . The air heating apparatus of  claim 4 , wherein, when a current mode corresponds to a hot water mode in which use of the hot water is required, the controller controls the valve part to open the hot water heating flow path and close the downstream side of the first point. 
     
     
         10 . The air heating apparatus of  claim 9 , further comprising:
 a hot water temperature measurement device coupled to the hot water tank, electrically connected to the controller, and configured to transmit information on an acquired temperature of the hot water in the hot water tank to the controller,   wherein the controller controls operations of the water heater and the circulation pump based on a value obtained by comparing the temperature of the hot water acquired by the hot water temperature measurement device with a target hot water temperature.   
     
     
         11 . The air heating apparatus of  claim 10 , further comprising:
 a supply water temperature measurement device disposed upstream of the heating area in the hot water heating flow path and configured to measure a temperature of water supplied to the heating area,   wherein the controller controls the operations of the water heater and the circulation pump based on a value obtained by comparing the temperature of the water acquired by the supply water temperature measurement device with a target supply water temperature.   
     
     
         12 . The air heating apparatus of  claim 10 , further comprising:
 a discharge water temperature measurement device disposed downstream of the heating area in the hot water heating flow path and configured to measure a temperature of water discharged from the heating area,   wherein the controller controls the operations of the water heater and the circulation pump based on a value obtained by comparing the temperature of the water acquired by the discharge water temperature measurement device with a target discharge water temperature.   
     
     
         13 . The air heating apparatus of  claim 10 , wherein, when a current mode corresponds to the hot water mode and corresponds to the heating mode in which heating of indoor air is required, the controller operates the fan. 
     
     
         14 . The air heating apparatus of  claim 10 , wherein, when a current mode corresponds to the hot water mode and does not correspond to the heating mode in which heating of indoor air is required, the controller stops the operation of the fan. 
     
     
         15 . The air heating apparatus of  claim 1 , wherein the heating area is formed in a spiral shape extending upward.