Segmental-control secondary heat exchange condensation type gas heating water heater

Abstract

The invention discloses a segmental-control secondary heat exchange condensation type gas heating water heater. The segmental-control secondary heat exchange condensation type gas heating water heater comprises a machine shell, a circulating water pump, a condensation heat exchanger, a draught fan, a combustion chamber, a heat exchanger, a segmental gas proportional valve, a control circuit board and a smoke discharge pipe; the circulating water pump and the control circuit board are fixedly mounted on a lower base plate of the machine shell through bolts, the output end of the circulating water pump is connected with the input end of the condensation heat exchanger through a water pipe, the draught fan is arranged on one side of the condensation heat exchanger, the output end of the condensation heat exchanger is connected to one side of the combustion chamber through a water pipe, the smoke discharge pipe is arranged on the top of the machine shell, a combustor is arranged at the bottom of the combustion chamber so as to increase the combustion area, the temperature is controlled through a water cooling pipe on the combustor, the temperature of the combustor cannot be too high, and therefore emissions of nitrogen oxides are reduced, heat efficiency is improved, the energy-saving environment-friendly effects are achieved, the practicability is high, and the water heater is easy to use and popularize.

Description

technical field [0001] The invention relates to the technical field of heating equipment, in particular to a two-stage heat exchange condensing gas heating water heater with segment control. Background technique [0002] Gas heating water heater is also called "gas wall-hung boiler". As the name implies, it relies on natural gas to provide hot water and heating heat. Gas heating water heaters are not the same as water heaters. Water heaters are also called "water heaters". They mainly provide hot water and cannot provide the energy needed for heating. Therefore, gas water heaters are just ordinary water heaters. Said gas heating water heater is a dual-function machine for heating and domestic water. [0003] At present, ordinary two-stage heat exchange condensing gas heating water heaters emit more nitrogen oxides, have lower thermal efficiency, are not energy-saving and environmentally friendly, and ordinary fans do not have the function of frequency conversion. When the c...

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Problems solved by technology

[0003] At present, ordinary two-stage heat exchange condensing gas heating water heaters emit more nitrogen oxides, have lower thermal efficiency, are not energy-saving and environmentally friendly, and ordinary fans do not have the function of frequency conversion. When the combustion load of the machine changes, The wind speed of the fan will not change. In addition, the ordinary burner nozzle is not large enough, the combustion area is small, the flame is not stable enough, and the safety is poor.

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