Heating system and method of controlling the same

Abstract

A heating system according to an embodiment of the present disclosure includes a water heating apparatus that supplies heating water for indoor heating, a hot water heating apparatus that heats hot water using the heating water, and a controller that controls a heating operation by controlling a flow rate of at least one of the heating water supply flow path and the hot water heating flow path according to an operation mode, wherein, when operating in a heating and hot water mode, the controller opens both the heating water supply flow path and the hot water heating flow path to control both indoor heating and hot water heating to be performed and adjusts flow rates at which the water is supplied to the heating water supply flow path and the hot water heating flow path according to control priority of an indoor heating operation and a hot water heating operation.

What is claimed is: 
     
         1 . A heating system comprising:
 a water heating apparatus configured to heat water and supply heating water for indoor heating through a heating water supply flow path;   a hot water heating apparatus configured to heat hot water stored in a hot water tank using the heating water supplied from a hot water heating flow path coupled to one point on the heating water supply flow path; and   a controller configured to control a heating operation by controlling a flow rate of at least one of the heating water supply flow path and the hot water heating flow path according to an operation mode,   wherein, when operating in a heating and hot water mode, the controller opens both the heating water supply flow path and the hot water heating flow path to control both indoor heating and hot water heating to be performed and adjusts flow rates at which the water is supplied to the heating water supply flow path and the hot water heating flow path according to control priority of an indoor heating operation and a hot water heating operation.   
     
     
         2 . The heating system of  claim 1 , wherein the water heating apparatus includes:
 a first heat exchanger configured to generate the heating water by exchanging heat between exhaust gas burned in a burner and the water;   a second heat exchanger configured to generate heated air by exchanging heat between the heating water generated by the first heat exchanger and air;   a fan configured to blow the air to the second heat exchanger; and   a heating valve installed on the heating water supply flow path connecting the first heat exchanger and the second heat exchanger to open or close the heating water supply flow path.   
     
     
         3 . The heating system of  claim 2 , wherein one side of the hot water heating flow path is coupled to one point on the heating water supply flow path between the first heat exchanger and the heating valve so that the heating water flowing through the heating water supply flow path is introduced, the other side thereof is coupled to one point on a return water flow path configured to return the water heat-exchanged by the second heat exchanger to an expansion tank, and a heating area configured to transfer heat to the hot water in the hot water tank is formed in a predetermined section of the hot water heating flow path. 
     
     
         4 . The heating system of  claim 3 , further comprising:
 a hot water heating valve installed on the hot water heating flow path and configured to open or close the hot water heating flow path.   
     
     
         5 . The heating system of  claim 4 , wherein the controller is configured to:
 control the heating valve to be opened and the hot water heating valve to be closed in a heating mode;   control the heating valve to be closed and the hot water heating valve to be opened in a heating water mode; and   control both the heating valve and the hot water heating valve to be opened and control opening degrees of the heating valve and the hot water heating valve based on a ratio of a heating flow rate at which the water is supplied to the second heat exchanger and a hot water heating flow rate at which the water is supplied to the hot water heating flow path in the heating and hot water mode.   
     
     
         6 . The heating system of  claim 5 , wherein, in the heating and hot water mode, when the heating flow rate and the hot water heating flow rate do not reach target flow rates, the controller feeds back the heating flow rate and the hot water heating flow rate to increase the opening degrees of the heating valve and the hot water heating valve. 
     
     
         7 . The heating system of  claim 5 , wherein, in the heating and hot water mode, the controller increases or decreases the opening degrees of the heating valve and the hot water heating valve so that a temperature of the heating water supplied to the heating water supply flow path and the hot water heating flow path reaches a temperature higher than a target hot water temperature set in the hot water tank. 
     
     
         8 . The heating system of  claim 7 , wherein, in the heating and hot water mode, the controller controls an amount of combustion heat of the first heat exchanger so that the temperature of the heating water supplied to the heating water supply flow path and the hot water heating flow path reaches a maximum heating temperature. 
     
     
         9 . The heating system of  claim 5 , wherein, in the heating and hot water mode, the controller controls an air volume of the fan so that an indoor temperature reaches a target temperature. 
     
     
         10 . A method of controlling a heating system, the method comprising:
 supplying heating water heated by a water heating apparatus according to an operation mode of the heating system; and   controlling a heating operation by controlling a flow rate of at least one of a heating water supply flow path through which the heating water is supplied for indoor heating and a hot water heating flow path which is coupled to one point on the heating water supply flow path and through which the heating water for heating hot water stored in a hot water tank of a hot water heating apparatus is supplied,   wherein the controlling of the heating operation includes:   in a heating and hot water mode, controlling both the heating water supply flow path and the hot water heating flow path to be opened to perform both indoor heating and hot water heating, and adjusting a flow rate at which the water is supplied to the heating water supply flow path and the hot water heating flow path according to control priority of the indoor heating and the hot water heating.   
     
     
         11 . The method of  claim 10 , wherein the adjusting of the flow rate includes:
 in a heating mode, controlling a heating valve installed on the heating water supply flow path and configured to open or close the heating water supply flow path to be opened and a hot water heating valve installed on the hot water heating flow path and configured to open or close the hot water heating flow path to be closed;   in a hot water mode, controlling the heating valve to be closed and the hot water heating valve to be opened; and   in the heating and hot water mode, controlling both the heating valve and the hot water heating valve to be opened, and controlling opening degrees of the heating valve and the hot water heating valve based on a ratio of a heating flow rate at which the water is supplied to a heat exchanger configured to heat air for indoor heating and a hot water heating flow rate at which the water is supplied to the hot water heating flow path.   
     
     
         12 . The method of  claim 11 , wherein the controlling of the heating operation further includes:
 in the heating and hot water mode, feeding back the heating flow rate and the hot water heating flow rate and increasing the opening degrees of the heating valve and the hot water heating valve when the heating flow rate and the hot water heating flow rate do not reach target flow rates.   
     
     
         13 . The method of  claim 11 , wherein the controlling of the heating operation further includes:
 in the heating and hot water mode, increasing or decreasing the opening degrees of the heating valve and the hot water heating valve so that a temperature of the heating water supplied to the heating water supply flow path and the hot water heating flow path reaches a temperature higher than a target hot water temperature set in the hot water tank.   
     
     
         14 . The method of  claim 13 , wherein the controlling of the heating operation further includes:
 in the heating and hot water mode, controlling an amount of combustion heat of the heat exchanger configured to generate the heating water so that the temperature of the heating water supplied to the heating water supply flow path and the hot water heating flow path reaches a maximum heating temperature.   
     
     
         15 . The method of  claim 11 , wherein the controlling of the heating operation further includes:
 in the heating and hot water mode, controlling an air volume of a fan configured to blow air to the heat exchanger configured to heat the air so that an indoor temperature reaches a target temperature.