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A self-adaptive control method for wind speed of DC frequency conversion gas water heater

A gas water heater and direct current frequency conversion technology, which is applied to the wind speed control of gas water heaters and the wind speed adaptive control field of direct current variable frequency gas water heaters, can solve problems such as unsmooth discharge, untimely alarm, unstable combustion, etc. Reasonable design to improve the effect of combustion wind resistance

Active Publication Date: 2022-02-11
VATTI CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the wind pressure switch only has two signals of opening and closing, the alarm points are consistent under different installation environments (the length of the smoke pipe) or different operating loads, which will cause some alarms to be delayed. When there is a strong wind outside, the wind pressure The signal is normal, but due to the unsmooth exhaust gas discharge, the oxygen supply is insufficient, the combustion will be unstable and unacceptable, and a large amount of flue gas exceeding the standard of CO will be generated. Based on this, this application proposes an adaptive control of the wind speed of the DC frequency conversion gas water heater method

Method used

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  • A self-adaptive control method for wind speed of DC frequency conversion gas water heater

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Effect test

Embodiment

[0027] The wind speed self-adaptive control method of the DC frequency conversion gas water heater includes the following process:

[0028] 1. When there is no blockage in the standard smoke pipe and there is no wind outside, the DC blower will intelligently match during normal combustion; when the user boils the water, start to calculate the demand load P(kw)=L*(T setting-T water intake) / 14 is Constant (when the user takes a bath with water, the general demand load is constant, and the set temperature and water flow do not change). For example, when the demand load is 16.5kw, it can be inferred that the work at this time is 6 segments, and the proportional valve is opened. The degree is between PH and PL, and the output speed of the fan is calculated from the proportional relationship as 2000+(16.5-10) / (23-10)*(3000-2000)=2500r / min. When the demand load changes, the fan speed changes accordingly;

[0029] 2. When the smoke pipe is blocked or there is wind outside:

[0030] ...

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Abstract

The invention discloses a self-adaptive control method for wind speed of a DC frequency conversion gas water heater, which comprises a housing, a heat exchanger, a combustion chamber, a gas interface, a water inlet interface, a water outlet interface, a smoke exhaust pipe and a DC fan. The beneficial effects of the present invention are: no need for wind pressure switch signal, by matching different fan speeds for different combustion working conditions, and by collecting and calculating the DC fan current, speed, etc., deduce the air duct resistance, and adjust the fan adaptively Speed, improve combustion wind resistance, different loads automatically match different fan speeds, intelligently judge the blockage of the air duct to increase the fan speed to achieve the optimal working state.

Description

technical field [0001] The invention relates to a wind speed control method for a gas water heater, in particular to a wind speed self-adaptive control method for a DC variable frequency gas water heater, and belongs to the technical field of constant temperature gas water heaters. Background technique [0002] Most of the existing gas water heaters are AC upward-pumped gas water heaters (the speed of the fan cannot be adjusted). After the closure is detected, the ignition is carried out, the gas valve is opened, and then it is burned, and the water flows out through the water heater after being heated. [0003] Before each ignition or during the combustion process, it is necessary to judge whether the air pressure is closed. If it is closed, it means that the air duct is unobstructed and the air pressure system is normal. Due to the strong external wind, or the accidental blockage of the smoke pipe, the wind pressure is not closed, and the flame may overflow or the combust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H9/20F24H15/238F24H15/35F24H15/395F24H15/112F24H15/31F24H15/407F24H15/242
CPCF24H9/2035
Inventor 郑来松
Owner VATTI CORP LTD
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