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Condensing gas water heater and waste heat recovery method

A technology of gas water heaters and condensing heat exchangers, applied in water heaters, fluid heaters, reducing greenhouse gases, etc., can solve problems such as waste of resources, waste of heat, heat loss, etc., to reduce waste heat, protect the environment, and improve thermal efficiency Effect

Active Publication Date: 2020-01-10
QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 exhaust gas temperature of existing condensing gas water heaters is lower than that of gas water heaters, but the exhaust gas temperature of condensing gas water heaters is still high and has a large amount of heat loss

Method used

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  • Condensing gas water heater and waste heat recovery method
  • Condensing gas water heater and waste heat recovery method
  • Condensing gas water heater and waste heat recovery method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the condensing gas water heater 1 includes a combustion chamber 2, a smoke exhaust pipe 3, a smoke exhaust channel 4, a main heat exchanger 5, a condensation heat exchanger 17 and a waste heat recovery device 6. The waste heat The recovery device 6 includes a heat pipe module 7 , one end of the heat pipe module 7 is located in the exhaust channel 4 between the condensing heat exchanger 17 and the exhaust pipe 3 , and the other end is located at the water inlet end of the condensing gas water heater 1 .

[0032] In this embodiment, when the condensing gas water heater 1 is working, the gas proportional valve 23 adjusts the intake air volume of the gas intake pipe 24 according to the set temperature, and the fan 22 adjusts the speed according to the intake air volume to control the air volume entering the combustion chamber 2. The gas is distributed by the gas distributor, mixed with air, and burned in the combustion chamber 2 to generate a larg...

Embodiment 2

[0039] like figure 2 As shown, the heat-absorbing module 8 is a finned heat-exchange structure, and the heat-exchanging fins 11 are arranged parallel to the smoke exhaust direction, and there is a smoke-exhausting gap between two adjacent heat-exchanging fins 11 , and the heat-absorbing module 8 Two through holes 10 are provided, and the heat pipe module 7 is provided with two L-shaped heat pipes 18 .

[0040] In this embodiment, the distance between the heat-absorbing ends 19 of the two heat pipes in the heat pipe module 7 is 1 / 3-1 / 2 of the horizontal length of the heat exchange fins 11 .

[0041] In this embodiment, the distance between the heat-absorbing ends 19 of the two heat pipes is greater than the distance between the heat-dissipating ends 20 .

[0042] In this embodiment, the heat release module 9 is provided with at least two through holes 10, one through hole 10 is mated with the water inlet pipe, and the other through holes 10 are mated with the heat pipe heat r...

Embodiment 3

[0045] like image 3 As shown, the heat release module 9 in the waste heat recovery device 6 uses a finned heat exchange structure.

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PUM

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Abstract

The invention relates to a condensing type fuel gas water heater. The condensing type fuel gas water heater comprises a combustion chamber, a smoke exhausting pipe, a main heat exchanger, a condensing heat exchanger and a waste heat recycling device; the waste heat recycling device comprises a heat pipe module; one end of the heat pipe module is located in the portion, between the condensing heat exchanger and the smoke exhausting pipe, of a smoke exhausting channel; and the other end of the heat pipe module is located at the water inflow end of the water heater. The waste heat recycling device further comprises a heat absorbing module and a heat releasing module; the heat absorbing module is arranged in the smoke exhausting channel; the heat releasing module is arranged outside the smoke exhausting channel; and the heat pipe module is connected with the heat absorbing module and the heat releasing module. According to the condensing type fuel gas water heater, waste heat of waste gas exhausted by the condensing type fuel gas water heater is transmitted to pre-heat inflow water of the condensing type fuel gas water heater through a heat pipe. By means of the condensing type fuel gas water heater, the waste heat of high-temperature flue gas of the condensing type fuel gas water heater can be fully recycled and used, the heat efficiency of the condensing type fuel gas water heater is improved, and meanwhile, energy conservation and environmental protection are achieved, the structure is simple, and cost is low.

Description

technical field [0001] The invention relates to the field of water heaters, in particular to gas water heaters, in particular to a condensing 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 excha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H1/10F24H9/00F24H9/18F23J15/06
CPCY02E20/30
Inventor 李以民劳春峰
Owner QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER
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