Heating device with hot water supply function

Abstract

A heating device with hot water supply function includes: a combustion means; a first heat exchanger; a circulation passage that connects the first heat exchanger and an room heating unit; a circulation pump; a bypass passage that branches off from the circulation passage; a second heat exchanger for hot water supply provided in the bypass passage; a cold water supply passage; a hot water supply passage for supply of hot water from the second heat exchanger; and a distribution means that is provided at a branching section and whose distribution ratio can be adjusted, so that it becomes possible selectively to execute either only room heating operation, or only hot water supply operation, or simultaneous room heating operation and hot water supply operation; wherein the hot water supply outlet, the thermal medium inlet, and the room heating outlet of the distribution means are at the same height.

1 . A heating device with hot water supply function, comprising:
 a combustion means;   a heat exchanger for heating a thermal medium for room heating;   a circulation passage that connects the heat exchanger and a room heating unit;   a circulation pump for circulating the thermal medium provided in the circulation passage;   a bypass passage that branches off from the circulation passage and bypasses the room heating unit;   a heat exchanger for hot water supply provided in the bypass passage;   a cold water supply passage for supplying cold water to the heat exchanger for hot water supply;   a hot water supply passage for supply of hot water that has been heated by the heat exchanger for hot water supply at a predetermined set hot water supply temperature; and   a distribution means that is provided at a branching section where the bypass passage branches off from the circulation passage, and whose distribution ratio can be adjusted, so that it becomes possible selectively to execute either only room heating operation, or only hot water supply operation, or simultaneous room heating operation and hot water supply operation;   the distribution means being a distribution valve comprising a cylindrical main body portion, and a hot water supply outlet and a thermal medium inlet and a room heating outlet that are formed on the main body portion, and is disposed so that the axial direction of said main body portion is horizontal and the hot water supply outlet, the thermal medium inlet, and the room heating outlet are all at the same height.   
     
     
         2 . The heating device with hot water supply function according to  claim 1 , wherein the hot water supply outlet, the thermal medium inlet, and the room heating outlet are disposed at different positions along the axial direction of the main body portion, with pointing toward different directions. 
     
     
         3 . The heating device with hot water supply function according to  claim 1 , wherein the heat exchanger for hot water supply is a plate type heat exchanger that is formed as a rectangular parallelepiped; and the distribution means is disposed so that the axial direction of the main body portion is parallel to a longitudinal direction of the heat exchanger for hot water supply. 
     
     
         4 . The heating device with hot water supply function according to  claim 3 , wherein the hot water supply outlet of the distribution means is directly connected to a thermal medium inlet port of the heat exchanger for hot water supply by use of a metallic connection clip. 
     
     
         5 . The heating device with hot water supply function according to  claim 3 , wherein the hot water supply outlet of the distribution means and the thermal medium inlet port of the heat exchanger for hot water supply are connected together via a straight pipe section, of which one end portion is connected to the thermal medium inlet port by a first quick fastener, and the other end portion is connected to the hot water supply outlet by a second quick fastener; and a distance between the hot water supply outlet of said distribution means and the thermal medium inlet port corresponds to a distance between the center of the first quick fastener in its width direction and a center of the second quick fastener in its width direction.