Positive displacement gas water heater

Abstract

A positive displacement gas water heater comprises a sensible heat exchanger, a water storage tank, a water outlet tube, and a water inlet tube. The water storage tank is communicated with the water outlet tube and the water inlet tube. The positive displacement gas water heater is characterized in further comprising a circulating water inlet tube, a circulating water outlet tube, and a circulating water pump. A condensation heat transfer channel is arranged on the bottom of the storage water tank. A smoke inlet and a smoke outlet are arranged on the condensation heat transfer channel. The smoke inlet is communicated with an outlet of high temperature flue gas of the sensible heat exchanger. The smoke outlet is communicated with the smoke outlet tube. The bottom of the smoke outlet tube is communicated with a condensate water outlet tube. The storage water tank is communicated with the circulating water inlet tube and the circulating water outlet tube. The circulating water outlet tube, a heat exchange tube of the sensible heat exchanger, the circulating water pump and circulating water inlet tube are communicated to form a heating pipeline. The positive displacement gas water heater has the advantages of effectively absorbing latent heat of the smoke, accelerating convection of water inside the water tank, then improving heatl efficiency and the like.

Description

technical field [0001] The invention relates to a gas volume water heater. Background technique [0002] In the prior art, a gas volumetric water heater usually places a burner at the bottom of the water storage tank. There is a flue in the center of the water storage tank to discharge the flue gas generated during combustion. The water storage tank is surrounded by insulation materials, and the burner will The water in the tank is heated, and when the water is heated to the set temperature, the temperature controller controls the burner to stop burning. Since the central flue and bottom of the water storage tank cannot be kept warm, when the burner stops working, the hot water in the water storage tank will dissipate heat through the flue and bottom; in addition, when the water is heated, it is in a static heating state, and the heat transfer efficiency is not high; Due to volume reasons, gas volumetric water heaters usually use cast iron disc burners similar to stoves, an...

AI Technical Summary

Problems solved by technology

Since the central flue and bottom of the water storage tank cannot be kept warm, when the burner stops working, the hot water in the water storage tank will dissipate heat through the flue and bottom; in addition, when the water is heated, it is in a static heating state, and the heat transfer efficiency is not high; Due to volume reasons, gas volumetric water heaters usually use cast iron disc burners similar to stoves, and use non-closed atmospheric combustion

These three reasons lead to the low thermal efficiency of the existing gas volumetric water heaters, and the thermal efficiency is only about 75%.

In addition, from the aspect of absorbing the latent heat of flue gas, if the water storage tank needs to absorb both sensible heat and latent heat, the internal flue structure is complex, difficult to process, and will lead to large resistance of flue gas, so non-closed atmospheric combustion , it will not be able to burn normally due to poor smoke exhaust, resulting in the inability to absorb the latent heat of the smoke, the convection of the water in the water tank is slow, and the thermal efficiency is low.

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