Gas water heater and waste heat recovery method

Abstract

The invention relates to a gas water heater and a waste heat recycle method. The gas water heater comprises a combustion chamber, a smoke emission pipe, a heat exchange passage, a main heat exchanger and a waste heat recycle device, wherein the heat exchange passage communicates with the combustion chamber and the smoke emission pipe; the waste heat recycle device comprises a heat pipe module; one end of the heat pipe module is located in the heat exchange passage, and the other end of the heat pipe module is located at the water inlet end of the water heater; the waste heat recycle device further comprises a heat absorption module and a heat emission module; the heat absorption module is arranged in the heat exchange passage; the heat emission module is arranged on the outer part of the heat exchange passage; and the heat pipe module is connected with the heat absorption module and the heat emission module. According to the gas water heater and the waste heat recycle method, waste heat of waste gas emitted by the gas water heater is transmitted to preheat inlet water of the gas water heater by utilizing the heat pipe. By adopting the gas water heater and the waste heat recycle method, the waste heat of high-temperature smoke of the gas water heater can be fully recycled; the heat efficiency of the gas water heater is improved; meanwhile, the gas water heater is energy-saving and environment-friendly; the structure is simple; and cost is low.

Description

technical field [0001] The invention relates to the field of water heaters, in particular to a gas water heater, especially a gas water heater with waste heat recovery function and a waste heat recovery method. Background technique [0002] Gas water heater is a kind of hot water that uses gas as the main energy source. The high-temperature heat generated by gas combustion is transferred to the cold water flowing through the heat exchanger to reach the required temperature. It has the advantages of being ready-to-use and small footprint. At present, gas water heaters are commonly used in households. Because the gas water heaters on the existing market coil the water inlet pipe outside the combustion chamber, heat the cold water through the water inlet pipe and the outer wall of the combustion chamber, and the preliminarily heated water passes through the heat exchange chamber. The main heat exchanger is further heated to the set temperature. After heat exchange by the main ...

AI Technical Summary

Problems solved by technology

Although the invention recovers the exhaust gas, it uses water as the heat exchange medium and cannot effectively utilize the heat of the exhaust gas, and still wastes a large part of the heat, resulting in waste of resources and environmental pollution

In addition, the low-temperature incoming water directly passes through the flue, and the intersection of cold and heat is likely to cause condensed water to enter the flue, which will affect the service life of the gas water heater.

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