Gas water heater

Abstract

The invention discloses a gas water heater which comprises an air heater, a heat exchanger and a smoke exhaust fan. The air heater comprises a combustion chamber and a combustor arranged in the combustion chamber. The combustion chamber is provided with a cold air inlet, a hot air outlet and a gas inlet. The combustor is configured to enable the concentration of nitrogen oxide in generated hot air to be smaller than or equal to 30 mg / m<3> and the concentration of carbon monoxide in the generated hot air to be smaller than or equal to 50 mg / m<3>. The heat exchanger comprises a water storage tank and a heat exchange part. The heat exchange part is provided with a water inlet, a water outlet, an air inlet and an air exhaust opening. The water outlet communicates with the water storage tank. The air inlet communicates with the hot air outlet. The heat exchange part is configured to enable water entering from the water inlet to exchange heat with air entering from the air inlet. The smoke exhaust fan is used for sucking hot air generated by the combustor into the heat exchange part. By means of the gas water heater, generation of harmful gas of CO, nitrogen oxide and the like can better reduced, clean exhausting can be achieved, and the heat exchange efficiency between hot air and water can be improved.

Description

technical field [0001] The invention relates to the technical field of water heaters, in particular to a gas water heater. Background technique [0002] Gas water heaters in the prior art are generally divided into direct-fired gas water heaters and partitioned wall gas water heaters according to heating methods. [0003] The working principle of the direct-fired gas water heater is that the flame generated by the combustion directly contacts the water to transfer heat to increase the water temperature, but this method is likely to cause incomplete combustion and produce harmful gases such as CO. [0004] The working principle of the partition wall gas water heater is that the flue gas and water are separated by a tube wall or plate, and heat exchange is performed between the two through the tube wall or plate, but this method reduces the heat between the hot flue gas and the water. The heat transfer efficiency is high, and the pipe wall or plate is easy to scale, which is ...

AI Technical Summary

Problems solved by technology

[0003] The working principle of the direct-fired gas water heater is that the flame generated by the combustion directly contacts the water to transfer heat, so that the water temperature rises, but this method will easily lead to incomplete combustion and produce harmful gases such as CO

[0004] The working principle of the partition wall gas water heater is that the flue gas and water are separated by a tube wall or plate, and heat exchange is performed between the two through the tube wall or plate, but this method reduces the heat between the hot flue gas and the water. The heat transfer efficiency is high, and the pipe wall or plate is easy to scale, which is not conducive to the maintenance of the water heater

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