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A gas water heater and its fan self-correction control method and control system

A technology of a gas water heater and a control method, which is applied in the directions of combustion method, combustion control, and fuel supply adjustment, and can solve problems such as output air volume deviation, fan output speed deviation, and product performance degradation, so as to eliminate differences and eliminate fan speed Differences in signals and the effect of eliminating differences in wind pressure signals

Active Publication Date: 2020-07-17
GUANGDONG VANWARD NEW ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production process, due to the differences caused by different fan manufacturing batches, when the same operating current is input to the fan under the same test conditions, the output speed of the fan will have a large deviation, which will result in a larger output air volume. Large deviations will eventually affect the combustion and emission performance of the water heater, and cannot meet the high standard requirements of export products
At the same time, in the actual use of the product, due to changes in external conditions, the smoke exhaust of the water heater or the resistance of the air supply system will change, resulting in insufficient air supply and insufficient anti-interference ability of the product, which will eventually lead to a decline in product performance.

Method used

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  • A gas water heater and its fan self-correction control method and control system
  • A gas water heater and its fan self-correction control method and control system
  • A gas water heater and its fan self-correction control method and control system

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1 Shown is an embodiment of the fan self-correcting control method for a gas water heater of the present invention. The gas water heater includes a fan for adjusting the air volume and a gas proportional valve for adjusting the gas volume. The control method includes the following steps:

[0041] S10. In the adjustment mode of the gas water heater, adjust the amount of gas entering through the gas proportional valve, and adjust the current gear value of the fan according to the amount of gas to adjust the input current value of the fan;

[0042] S20. Enter the fan speed data acquisition mode, obtain the real-time speed of the fan, and compare and judge whether the real-time speed falls within the set speed range: if yes, exit the adjustment mode; if not, adjust according to the difference between the real-time speed and the reference speed Input the current value of the fan until the real-time speed within the set speed range is obtained;

[0043] S30. O...

Embodiment 2

[0048] Such as figure 2 Shown is an embodiment of the fan self-correcting control method for a gas water heater of the present invention. The gas water heater includes a fan for adjusting the air volume and a gas proportional valve for adjusting the gas volume. The control method includes the following steps:

[0049] S10. In the adjustment mode of the gas water heater, adjust the amount of gas entering through the gas proportional valve, and adjust the current gear value of the fan according to the amount of gas to adjust the input current value of the fan;

[0050] S20. Enter the fan speed data acquisition mode, obtain the real-time speed of the fan, and compare and judge whether the real-time speed falls within the set speed range: if yes, go to step S30; if not, adjust according to the difference between the real-time speed and the reference speed Input the current value of the fan until the real-time speed within the set speed range is obtained;

[0051] S30. Enter the ...

Embodiment 3

[0056] Such as image 3 Shown is the fan self-correcting control system of the gas water heater of the present invention, including a main controller, a fan power supply module, a fan control module, a current feedback module, a speed feedback module and an adjustment device:

[0057] The main controller obtains the speed signal of the fan through the speed feedback module, and obtains the current signal of the fan through the current feedback module; the main controller is provided with a comparison and judgment module for comparing and judging the real-time speed and the reference speed;

[0058] The input end of the fan power supply module is connected to the output end of the main controller, and the output end of the fan power supply module is connected to the input end of the fan;

[0059] The input end of the fan control module is connected to the output end of the main controller, and the output end of the fan control module is connected to the input end of the fan;

...

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Abstract

The invention relates to the technical field of intelligent control over gas water heaters, in particular to a gas water heater, and a fan self-correction control method and system of the gas water heater. The real-time rotating speed of a fan is monitored in the minimum rated heat load working mode and the maximum rated heat load working mode, the real-time rotating speed and the reference rotating speed are compared and analyzed, the difference value between the real-time rotating speed and the reference rotating speed is solved, the rotating speed of the fan is corrected to the reference rotating speed range based on the difference value, a current gear value corresponding to the corrected rotating speed is recorded in a main controller, a corrected rotating speed-current curve is obtained based on the obtained two-point current gear value, current shift values of a full load section are allocated, it is ensured that the fan rotating speed controlled by the optimized fan control current and the reference value keep high consistency, thus the air volume influence caused by the fan batch difference is eliminated, the adaptability of the gas water heater to components is improved,and the effective guarantee is provided for stable performance of the gas water heater.

Description

technical field [0001] The invention relates to the technical field of intelligent control of gas water heaters, and more specifically, to a self-correcting control method and control system for a gas water heater and its fan. Background technique [0002] At present, the corresponding gas and air demand is often matched according to the rated design load of the gas water heater to ensure sufficient combustion. Precisely controlled allocation of air volume. However, in the actual production process, due to the differences caused by different fan manufacturing batches, when the same operating current is input to the fan under the same test conditions, the output speed of the fan will have a large deviation, which will result in a larger output air volume. Large deviations will eventually affect the combustion and emission performance of the water heater, and cannot meet the high standard requirements of export products. At the same time, in the actual use of the product, du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N1/02
CPCF23N1/025F23N2239/04F23N2241/04
Inventor 卢楚鹏张上兵
Owner GUANGDONG VANWARD NEW ELECTRIC CO LTD