Boiler system for both heating and hot water

Abstract

The objective of the present invention is to provide a boiler system for bath heating and hot water that is capable of performing heating and hot water preheating by using a single circulation pump for both without the need to separately include a circulation pump for heating and a circulation pump for hot water preheating. In order to achieve the above objective, the present invention provides a boiler system for both heating and hot water, comprising: a heat exchanging unit; a heating water channel connected between the heat exchanging unit and a place to be heated; a tap water supply pipe for supplying tap water to the heat exchanging unit; a hot water supply pipe for supplying hot water to a place requiring hot water from the heat exchanging unit; a hot water recirculation channel connected to the hot water supply pipe at a first branch point branched from one side of the heating water channel; a hot water bypass channel connected from the second branch point branched from the other side of the heating water channel to the tap water supply pipe; and a circulation pump disposed between the first branch point and the second branch point.

1 . A boiler system for both heating and hot water, comprising:
 a heat exchange unit;   a heating water channel connected between the heat exchange unit and a heating destination;   a tap water supply pipe through which tap water is supplied to the heat exchange unit;   a hot water supply pipe through which heating is supplied from the heat exchange unit to a hot water destination;   a hot water recirculation channel connected to the hot water supply pipe from a first branch point at which the hot water recirculation channel is branched from one side of the heating water channel;   a hot water bypass channel connected to the tap water supply pipe at a second branch point at which the hot water bypass channel is branched from the other side of the heating water channel; and   a circulation pump disposed between the first branch point and the second branch point.   
     
     
         2 . The boiler system of  claim 1 , wherein the heat exchange unit includes a hot water storage type heat exchanger configured to store the heating water supplied to the heating destination therein and heat the heating water using a heat source. 
     
     
         3 . The boiler system of  claim 1 , wherein the heat exchange unit includes a main heat exchanger configured to heat the heating water supplied for heating or supplied for exchanging heat by using combustion heat and a hot water heat exchanger configured to generate the hot water through a heat exchange between the heating water heated in the main heat exchanger and tap water. 
     
     
         4 . The boiler system of  claim 3 , wherein the heating water channel is connected between the main heat exchanger and the heating destination, and
 the tap water supply pipe and the hot water supply pipe are connected to the hot water heat exchanger.   
     
     
         5 . The boiler system of  claim 1 , wherein a first three-way valve is provided at the first branch point, and
 a second three-way valve is provided at the second branch point.   
     
     
         6 . The boiler system of  claim 1 , wherein a first three-way valve is provided at the first branch point, and
 a check valve is provided in the hot water bypass channel to restrict a flow path such that preheated hot water flows in only one direction toward the tap water supply pipe.   
     
     
         7 . The boiler system of  claim 1 , wherein the heating water channel between the first branch point and the second branch point is used as a common channel through which the heating water and preheated hot water selectively flow. 
     
     
         8 . The boiler system of  claim 1 , wherein, when a hot water preheating function is selected in a room controller, the circulation pump is operated for a certain time so that the hot water preheating function is operated. 
     
     
         9 . The boiler system of  claim 8 , wherein, when a hot water function is selected in the room controller during the operation of the hot water preheating function, the circulation pump is additionally operated for the certain time so that the hot water preheating function is operated. 
     
     
         10 . The boiler system of  claim 9 , wherein, when hot water is used in the hot water destination during the operation of the hot water preheating function, the operation of the circulation pump is stopped, and the hot water supply function is operated.