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Adjustable premixer and gas water heater

A premixer and adjustable technology, applied in the direction of burner, combustion method, combustion type, etc., can solve the problems of small heat load adjustment range, low load adjustment ratio, water heater can not work, etc.

Pending Publication Date: 2020-10-27
GUANGDONG VANWARD NEW ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In winter in the north, the outdoor temperature is generally below zero, while the indoor temperature is above 20 degrees. Therefore, the temperature difference formed makes the outdoor cold air easily enter the water heater through the exhaust channel of the gas water heater, thus freezing the heat exchanger of the water heater ( The water freezes and expands the water pipe), and the non-condensing machine generally adds an anti-backflow device at the smoke exhaust port of the water heater, but most of the fully premixed combustion water heaters are condensing machines, such as adding an anti-backflow device at the smoke exhaust port. Frozen condensate freezes and cannot be turned on, causing the water heater to fail to work
At the same time, the existing premixer also has defects such as a small adjustment range of heat load and a low load adjustment ratio.

Method used

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  • Adjustable premixer and gas water heater
  • Adjustable premixer and gas water heater
  • Adjustable premixer and gas water heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment one, with reference to Figure 1 ~ Figure 3 , an adjustable premixer, including: a housing 100 and a stopper 200, the housing 100 is provided with a premixing chamber 110, the premixing chamber 110 is a Venturi tube structure, the premixing chamber 110 From back to front, it includes constriction section 111, throat 112 and diffusion section 113. The diffusion section 113 includes an air outlet; the structure of the premixing chamber 110 is based on the Venturi-shaped chamber structure, and there is a Throat with reduced cross-section. The Venturi-shaped chamber structure is more conducive to the full mixing of gas and air, thereby reducing CO and NOx emissions and improving thermal efficiency. The gas outlet is arranged near the throat 112, and the gas outlet will be more mixed with the air at the throat, thereby reducing CO and NOx emissions and improving thermal efficiency. The throat 112 is provided with a gas channel 120, the gas channel 120 communicat...

Embodiment 2

[0041] Embodiment two, see Figure 4 ~ Figure 5 , different from Embodiment 1, the gas outlet faces upwards, and the blocking member 200 moves up and down relative to the casing 100 . By using the electric device to drive the stopper 200 to move up and down, the bottom plate 210 moves upward, so that the bottom plate 210 leaves the gas outlet, the premixer is opened, so the plug 220 moves upward following the bottom plate 210, and the gas outlet is also opened. The premixer works fine.

[0042] see Figure 5 Further as a preferred embodiment, the plug 220 and the bottom plate 210 are independent and different components, and the two are movably connected. By adjusting the initial position of the plug 220 on the bottom plate 210, the stopper 200 can be opened to obtain Different mixture ratios of gas and air.

Embodiment 3

[0044] see Figure 6 ~ Figure 7 , when different from Embodiment 1, the baffle 200 is hinged to the housing 100, the windshield part of the baffle 200 is a flap 230, and the rear of the flap 230 is provided with a stopper 240, so The stopper 240 is a gas blocking part, the stopper 240 includes an arc surface, the gas outlet is arc-shaped, the gas outlet is adapted to the stopper 240, the stopper 200 is on the first In the first position, the flap 230 completely blocks the tuyere, and the stopper 240 completely covers the gas channel 120 .

[0045] When working, the electric device drives the stopper 200 to rotate relative to the housing 100, see Figure 6 , when in the first position, the flap 230 blocks the tuyere (may partially block the tuyere), and the stopper 240 blocks the gas outlet (can partially block the gas outlet, or completely block the gas outlet without sealing) ; see Figure 7 , when the stopper 200 is turned forward relatively, the flap 230 will open the tu...

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PUM

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Abstract

The invention discloses an adjustable premixer and a gas water heater. The adjustable premixer comprises a housing and a stopper, wherein a premixing cavity is arranged in the housing, a gas channel is arranged in a throat channel and is communicated with the premixing cavity, and the gas channel comprises a gas outlet; the stopper is disposed in the premixing cavity and provided a first positionand a second position, the stopper can continuously move between the first position and the second position, and the stopper comprises a wind blocking part and an air blocking part. The stopper is additionally arranged in the premixing cavity, cold air is prevented from flowing back to a heat exchanger to cause damage, and meanwhile, the risk that fuel gas is directly exhausted due to misoperationor faults of a gas valve is eradicated, and the product safety is improved; and moreover, the gas inlet areas of fuel gas and air can be synchronously changed, the thermal load adjusting range is greatly widened, the temperature adjusting range is widened, the load adjusting ratio is increased, the product comfort is improved, and the adjustable premixer is particularly suitable for large-load gas appliances.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to a mixer for fully premixing air and gas in a gas water heater. Background technique [0002] In gas water heaters, gas combustion is divided into diffusion combustion, partial premixed combustion (atmospheric combustion) and full premixed combustion. Premixed combustion (premixed combustion) refers to the process in which air and gas are fully mixed in advance according to a certain proportion to form a premixed gas, which is then ignited and burned in the burner. Premixed combustion generally occurs in a relatively closed system. Premixed combustion is widely used in industrial boilers because the gas and air (oxygen) are fully mixed before combustion. Compared with diffusion combustion, the flame propagation speed is faster, the combustion temperature is higher, and the ductility is better. [0003] In winter in the north, the outdoor temperature is generally below ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/62F24H9/18
CPCF23D14/62F24H9/1836
Inventor 卢宇聪潘同基李罗标张上兵潘泽林岑锦泉李学研
Owner GUANGDONG VANWARD NEW ELECTRIC CO LTD