Patent ID: 9651266
Date: 2017-05-16
CPC Classifications: F24D,F24H,Y02B

Claim:
1. A gas hot water heating device comprising: a combustion device; an inlet and an outlet of a hot water pipeline; an inlet and an outlet of a heating loop; a water tank; a first heat exchanger; a second heat exchanger; a third heat exchanger; a flue gas outlet of the combustion device is connected to a flue gas path of the first and the second heat exchangers in series according to sequence; the first heat exchanger has a first flow channel and a second flow channel, and the water tank and the first flow channel of the first heat exchanger are connected in series between the inlet and the outlet of the hot water pipeline; the second flow channel of the first heat exchanger and a flow channel of the third heat exchanger are connected in series between the inlet and the outlet of the heating loop; wherein heat exchange can be realized between the second and the third heat exchangers and the water inside the water tank, wherein heat exchange is done in the first heat exchanger between the water flowing in the hot water pipeline and that flowing in the heating loop.