CN112113349B - Control method of water heater and water heater - Google Patents
Control method of water heater and water heater Download PDFInfo
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- CN112113349B CN112113349B CN202010990110.2A CN202010990110A CN112113349B CN 112113349 B CN112113349 B CN 112113349B CN 202010990110 A CN202010990110 A CN 202010990110A CN 112113349 B CN112113349 B CN 112113349B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 572
- 238000000034 method Methods 0.000 title claims abstract description 110
- 238000002485 combustion reaction Methods 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 42
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims description 53
- 238000005070 sampling Methods 0.000 claims description 45
- 230000002159 abnormal effect Effects 0.000 claims description 36
- 230000001276 controlling effect Effects 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 8
- 230000001133 acceleration Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 description 6
- 230000011218 segmentation Effects 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The invention discloses a control method of a water heater and the water heater; the method comprises the following steps: s1, judging whether the water flow control device of the water heater is normal, if so, entering the step S2 or/and S3; s2, detecting the noise value of the current sectional water heater, and judging whether the water heater is stably combusted according to the noise value; if not, go to step S4; s3, detecting the wind pressure value of the air duct of the water heater, and judging whether the wind pressure of the water heater is stable and whether the combustion is stable according to the wind pressure value; if not, go to step S4; and S4, increasing the rotating speed of the fan of the water heater, and increasing the oxygen supply amount to enable the water heater to burn stably. The water heater comprises a water heater body, a noise detection unit, a wind pressure sensor, a fan, a controller and a water flow control device. The invention can accurately judge whether the water heater is stably combusted and the water flow control device is normal or not by detecting the noise and the air pressure, and controls the water heater to stably combust so as to reduce the noise.
Description
Technical Field
The invention belongs to the technical field of water heaters, and particularly relates to a control method of a water heater and the water heater.
Background
Most of the existing gas water heaters are alternating-current updraft gas water heaters, the fan of the existing gas water heaters cannot be adjusted, when a user uses water, the gas water heater detects a water flow signal, the fan is started to clean the water, waste gas in the water heater is discharged through a smoke tube, the air pressure switch detects the closing of the air pressure switch, then ignition is carried out, an air valve is opened, then combustion is carried out, and water flows out through the water heater after being heated.
Before the water heater is ignited at each time or in the combustion process, whether a signal of the wind pressure switch is closed or not is judged, the closing represents that the air channel is smooth, and the wind pressure system is normal. Due to the fact that external wind is large, or the smoke pipe is accidentally blocked, and the signal of the wind pressure switch is not closed, flame overflow or insufficient combustion can be caused, and the water heater can give an alarm. However, because the wind pressure switch only has two signals for opening and closing, alarm points are consistent under different installation environments (smoke pipe length) or different operation loads, which can cause partial alarm to be untimely or false alarm to appear.
Therefore, the real situation of the wind pressure of the water heater can not be accurately reflected by the existing wind pressure switch, and the phenomenon that the water heater is unstable in combustion and squeal occurs due to insufficient oxygen supply when the wind pressure is unstable can still occur. On the other hand, when the water flow control device of the water heater works, the water heater may generate a sudden noise.
Disclosure of Invention
In order to solve the problems and the defects of the prior art, the invention aims to provide a control method of a water heater and the water heater, which can accurately judge whether the water heater is stably combusted and whether a water flow control device is normal or not by detecting noise and wind pressure, control the water heater to stably combust and reduce noise.
In order to achieve the above object, the present invention provides a method for controlling a water heater, wherein a fire grate of the water heater is provided with a plurality of segments, the method comprising the following steps:
s1, judging whether the water flow control device of the water heater is normal, if so, entering the step S2 or/and S3;
s2, detecting the noise value of the current sectional water heater, and judging whether the water heater is stably combusted according to the noise value; if not, go to step S4;
s3, detecting the wind pressure value of the air duct of the water heater, and judging whether the wind pressure of the water heater is stable and whether the combustion is stable according to the wind pressure value; if not, go to step S4;
and S4, increasing the rotating speed of the fan of the water heater, and increasing the oxygen supply amount to enable the water heater to burn stably.
Further, in step S1, the water flow control device includes a water pump, and the method for determining whether the water pump is normal includes: when the wind pressure of the water heater is stable, the noise of the water heater is larger than a noise specified value, the fluctuation amplitude of the noise is larger than a noise amplitude threshold value, and the water flow is unstable, the water pump is judged to be abnormal, otherwise, the water pump is judged to be normal.
Further, after judging that the water pump is abnormal, processing the water pump, including: and reducing the power of the water pump, and then detecting whether the noise of the water heater is greater than a noise specified value again.
Further, the method for treating the water pump further comprises the following steps: when the water heater is in a zero cold water mode, the power of the water pump is per t1And (4) proportionally reducing the second once, judging whether the water pump is normal after each reduction, and continuously reducing the power of the water pump if the water pump is abnormal until the water flow is smaller than a specified flow value.
Further, when the water flow is smaller than the specified flow value, the water pump is judged to be still abnormal, and the abnormal fault of the water pump is prompted.
Further, the method for treating the water pump further comprises the following steps: when the water heater is in the water use pressurizing mode of the user, the power of the water pump is per t1And (4) proportionally reducing the second once, judging whether the water pump is normal or not after reducing every time, and continuously reducing the power of the water pump if the water pump is abnormal until the water pump is regulated to be shut down.
Further, the method for determining whether the water flow in the water heater is stable comprises the following steps: and detecting the flow value of the water flow, and if the fluctuation amplitude of the flow value is larger than the flow amplitude threshold value, judging that the water flow is unstable.
Further, the method for detecting the flow value of the water flow comprises the following steps: every t2And sampling a group of flow value data in seconds to obtain an average value of the group of flow value data and a difference value delta Q between the maximum value and the minimum value, wherein the delta Q is the fluctuation amplitude of the flow value.
Further, every t2A method of second sampling a set of flow value data comprising: every t2And acquiring one flow value data every n seconds, and sampling the latest n flow value data to obtain a group of flow value data containing the latest n sampling values.
Further, in step S1, the water flow control device includes a water regulating valve for regulating water flow, and the method for determining whether the water regulating valve is normal includes: if the wind pressure of the water heater is stable and the noise of the water heater is larger than the specified noise value, the water regulating valve is judged to be abnormal, otherwise, the water regulating valve is judged to be normal.
Further, after the water regulating valve is judged to be abnormal, the opening degree of the water regulating valve is increased, whether the noise of the water heater is larger than a noise specified value or not is detected, if yes, the opening degree of the water regulating valve is continuously increased until the water regulating valve is regulated to the maximum opening degree.
Further, if the water regulating valve is regulated to the maximum opening degree, the noise of the water heater is still larger than the noise specified value, and the abnormal fault of the water regulating valve is prompted.
Furthermore, the opening degree of the water regulating valve is increased by 50-200 steps each time.
Further, the step S4 includes, after increasing the fan speed of the water heater, returning to the step S2 and/or the step S3 until the fan speed of the water heater reaches the maximum speed increase, and if the water heater is still unstable, entering the step S5; step S5 includes increasing the segmentation of the water heater fire rows and keeping the total load constant, so that the load of each burning water heater fire row is reduced and the oxygen supply requirement is reduced.
Further, step S5 includes, if the hot water bank is not in the current maximum segment and the same load exists in the segment of the first gear higher than the current segment, increasing the segment of the hot water bank and keeping the total load unchanged.
Further, step S5 includes, if the fire grate of the water heater is increased to the maximum segment, or the segment of the first gear has no load same as the current segment, and the combustion of the water heater is still unstable, turning down the gas proportional valve to make the outlet water temperature of the water heater less than the set temperature by T degrees.
Further, the step S5 includes, after the gas proportional valve is turned down, continuing to judge whether the water heater burns normally through the step S2 or/and the step S3; and if the water heater is still unstable in combustion, prompting the fault of the air pressure system of the water heater.
Further, step S5 includes, if the fire grate of the water heater is increased to the maximum segment, or the segment of the first gear has no load same as the current segment, and the water heater is still burning unstably, decreasing the opening of the water regulating valve of the water flow control device, decreasing the water flow, and decreasing the load of the water heater.
And further, reducing the water flow by 0.2-1L/min each time, then judging whether the combustion of the water heater is stable, and if not, continuously reducing the water flow until the water flow is reduced to a specified flow value.
Further, if the water flow is reduced to a specified flow value, the water heater still burns unstably, and then the wind pressure system fault of the water heater is prompted.
Further, step S2 further includes: continuously acquiring a noise detection value of the current subsection water heater fire exhaust after the outlet water temperature of the water heater is stable; and if the noise detection value is larger than the noise specified value of the current segment and the fluctuation amplitude of the noise detection value is larger than the specified noise amplitude threshold value, judging that the wind pressure of the water heater is unstable.
Further, the method for continuously acquiring the fire emission noise detection value of the current sectional water heater comprises the following steps: every t3A set of noise value data is sampled in seconds, and an average value A of the set of noise value data and a difference value delta A between a maximum value and a minimum value are obtained.
Further, every t3A method of sampling a set of noise value data in seconds comprising: every t3And acquiring noise value data every n seconds, and sampling the latest n noise value data to obtain a group of noise value data containing n latest sampling values.
Further, the method for judging unstable wind pressure of the water heater comprises the following steps: and judging that the average value A is larger than the noise specified value of the current gear, and the difference value delta A is larger than the noise amplitude threshold value.
Further, step S3 further includes: and after the outlet water temperature of the water heater is stable, continuously acquiring a wind pressure detection value of a water heater air channel, and if the fluctuation amplitude of the wind pressure detection value is larger than a specified wind pressure amplitude threshold value, judging that the wind pressure of the water heater is unstable.
Further, the method for continuously acquiring the wind pressure detection value of the air duct of the water heater comprises the following steps: every t4And sampling a group of wind pressure value data in seconds, and calculating the difference value delta B between the maximum value and the minimum value.
Further, every t2The method for sampling a group of wind pressure value data in seconds comprises the following steps: every t4And acquiring a wind pressure value data in m seconds, and sampling the latest n wind pressure value data to obtain a group of wind pressure value data containing the n latest sampling values.
Further, the method for judging unstable wind pressure of the water heater comprises the following steps: and judging that the difference value delta B is larger than the wind pressure amplitude threshold value.
Further, in step S4, the method for increasing the rotation speed of the fan of the water heater includes: the rotating speed of the fan of the water heater is increased by 50-200r/min each time, and the rotating speed of the fan of the water heater is increased by 2-10 times at most.
Further, the water heater fire grate is provided with three grades of subsections, including two subsections, quartering section and six subsections.
Furthermore, the noise specified value corresponding to each section is 5-20dB greater than the noise estimated value of the section load.
Furthermore, after the water outlet temperature of the water heater is stable, a noise estimation value is obtained through matching and calculation according to the current sectional load.
Furthermore, the noise estimation value of the minimum load of the two sections is 40dB, the noise estimation value of the maximum load is 46dB, and the value range of the noise estimation value of the two sections is 40-46 dB.
Furthermore, the noise estimation value of the minimum load of the four segments is 42dB, the noise estimation value of the maximum load is 50dB, and the value range of the noise estimation value of the four segments is 42-50 dB.
Furthermore, the noise estimation value of the minimum load of the six segments is 45dB, the noise estimation value of the maximum load is 55dB, and the value range of the noise estimation value of the six segments is 45-55 dB.
Further, the minimum load of the two segments is 2-4kw, and the maximum load is 6-8 kw.
Further, the minimum load of the four segments is 5-7kw, and the maximum load is 12-14 kw.
Further, the minimum load of the six segments is 9-11kw, and the maximum load is 22-24 kw.
Furthermore, the value range of the noise amplitude threshold is 8-15 dB.
Further, the value range of n is 5-20.
Further, the value range of T is 1-3.
Further, the value range of the wind pressure amplitude threshold is 5-20 Pa.
Further, t1The value range of (A) is 1 to 3.
Further, t2The value range of (A) is 1-10.
Further, t3Is gotThe value ranges from 1 to 10.
Further, t1The value range of (A) is 1-10.
Further, the value range of the proportion is 5% -20%.
Further, the value range of the flow amplitude threshold is 0.5-2L/min.
Further, before the step S1, it is further included that before the water heater is ignited, whether the air duct of the water heater is unblocked is detected, and if so, the ignition of the water heater starts to burn.
Further, the method for judging whether the air duct of the water heater is unblocked comprises the following steps: detecting the wind pressure generated by the wind channel towards the smoke tube, if the wind pressure is greater than 69Pa, judging that the wind pressure is normal and the wind channel is smooth; if the wind pressure is less than 25pa, the wind pressure is judged to be abnormal, and the air duct is blocked.
The invention also provides a water heater, which adopts the control method of the water heater, and comprises a water heater body, a noise detection unit, a wind pressure sensor, a fan, a controller and a water flow control device, wherein the noise detection unit, the controller, the wind pressure sensor, the fan and the water flow control device are all arranged on the water heater body; the noise detection unit detects the noise of the water heater, the wind pressure sensor detects the wind pressure value of the wind channel of the water heater, and the controller controls the working conditions of the fire grate, the fan and the water flow control device of the water heater body according to the detection values of the noise detection unit and the wind pressure sensor.
The water flow control device comprises a water pump and a water regulating valve, and the water pump and the water regulating valve are arranged on a water inlet pipeline of the water heater body.
Compared with the prior art, the invention has the beneficial effects that: firstly, judging whether the water flow control device is normal or not, and avoiding the influence on the detection of the combustion noise of the water heater caused by the sudden and small noise of the water flow device due to the abnormity of the water flow control device; collecting a combustion noise value of the water heater through a noise detection unit, matching and corresponding to the load of the fire grate of the water heater, and judging whether the air pressure of the water heater is stable; meanwhile, a wind pressure value is detected through a wind pressure sensor, and whether the wind pressure of the water heater is stable or not is judged; if the noise value is not matched with the load of the current fire grate of the water heater, or the air pressure value exceeds a standard range, the air pressure of the water heater is unstable, so that the oxygen supply of a combustion chamber is insufficient, and the combustion of the fire grate is unstable; whether water heater wind pressure is stable is judged in detection that can be accurate like this. Then, when detecting that the wind pressure of the water heater is unstable and the oxygen supply is insufficient to cause unstable combustion, the rotating speed of the fan is increased, the exhaust emission of the water heater is accelerated, more air flows into the water heater, the oxygen supply amount is increased, the fire grate of the water heater can continue stable combustion, and the noise of the water heater is reduced.
Drawings
FIG. 1 is a flow chart of a method of controlling a water heater according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view of a fire row of a water heater according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a second water heater according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment is as follows:
an embodiment of the present invention provides a control method of a water heater, as shown in fig. 1 and 2, a fire grate of the water heater is provided with multiple stages of segments, and the method includes the following steps:
s1, judging whether the water flow control device of the water heater is normal, if so, entering the step S2 or/and S3;
s2, detecting the noise value of the current sectional water heater, and judging whether the water heater is stably combusted according to the noise value; if not, go to step S4;
s3, detecting the wind pressure value of the air duct of the water heater, and judging whether the wind pressure of the water heater is stable and whether the combustion is stable according to the wind pressure value; if not, go to step S4;
and S4, increasing the rotating speed of the fan of the water heater, and increasing the oxygen supply amount to enable the water heater to burn stably.
By adopting the method, whether the water flow control device has abnormal conditions, such as air in the water flow control device or breakage conditions, is judged, so that sudden and small noises are generated when the water flow control device works; the abnormal condition of the water flow control device is eliminated, and the influence on the detection of the combustion noise of the water heater due to the noise of the water flow control device can be avoided;
then collecting the combustion noise value of the water heater, matching and corresponding to the load of the fire grate of the water heater, and judging whether the air pressure of the water heater is stable; meanwhile, detecting a wind pressure value and judging whether the wind pressure of the water heater is stable; if the noise value is not matched with the load of the current fire grate of the water heater, or the air pressure value exceeds a standard range, the air pressure of the water heater is unstable, so that the oxygen supply of a combustion chamber is insufficient, and the combustion of the fire grate is unstable; whether water heater wind pressure is stable is judged in detection that can be accurate like this. Then, when detecting that the wind pressure of the water heater is unstable and the oxygen supply is insufficient to cause unstable combustion, the rotating speed of the fan is increased, the exhaust emission of the water heater is accelerated, more air flows into the water heater, the oxygen supply amount is increased, the fire grate of the water heater can continue stable combustion, and the noise of the water heater is reduced.
In step S1, the water flow control device includes a water pump, and the method for determining whether the water pump is normal includes: when the wind pressure of the water heater is stable, the noise of the water heater is larger than a noise specified value, the fluctuation amplitude of the noise is larger than a noise amplitude threshold value, and the water flow is unstable, the water pump is judged to be abnormal, otherwise, the water pump is judged to be normal.
When the water pump is judged to be abnormal, the water pump is processed, and the method comprises the following steps: and reducing the power of the water pump, and then detecting whether the noise of the water heater is greater than a noise specified value again. Specifically, when the water heater is in a zero cold water mode (in the mode, water in a water using pipeline communicated with the water heater periodically and circularly flows, the water is heated in the water heater, and the water in the whole water using pipeline is kept as hot water at all times), the power of the water pump is reduced by 10% every 2 seconds, whether the water pump is normal or not is judged after reduction every time, and if the water pump is abnormal, the power of the water pump is continuously reduced until the water flow is smaller than a flow specified value. When the water flow is smaller than the specified flow value of 2.5L/min, the water pump is judged to be still abnormal, and the water pump is prompted to have abnormal faults.
The method for treating the water pump further comprises the following steps: when the water heater is in a user water use pressurization mode (in the mode, the water heater increases the water pressure of water in a water pipe, increases the water flow and meets the water use requirement of a user), the power of the water pump is reduced by 10% every 2 seconds, whether the water pump is normal or not is judged after reduction every time, and if the water pump is abnormal, the power of the water pump is continuously reduced until the water pump is regulated to be shut down.
The method for judging whether the water flow in the water heater is stable comprises the following steps: and detecting the flow value of the water flow, and if the fluctuation amplitude of the flow value is greater than the flow amplitude threshold value 1L/min, judging that the water flow is unstable.
The method for detecting the flow value of the water flow comprises the following steps: every t2And sampling a group of flow value data in seconds to obtain an average value of the group of flow value data and a difference value delta Q between the maximum value and the minimum value, wherein the delta Q is the fluctuation amplitude of the flow value. In this embodiment, the method of sampling a set of flow value data every 5 seconds includes: and collecting flow value data every 0.5 second, and sampling the latest 10 flow value data to obtain a group of flow value data containing 10 latest sampling values.
In step S1, the water flow control device includes a water regulating valve for regulating water flow, and the method for determining whether the water regulating valve is normal includes: if the wind pressure of the water heater is stable and the noise of the water heater is larger than the specified noise value, the water regulating valve is judged to be abnormal, otherwise, the water regulating valve is judged to be normal.
And when the water regulating valve is judged to be abnormal, the opening degree of the water regulating valve is increased, whether the noise of the water heater is greater than a noise specified value is detected, if so, the opening degree of the water regulating valve is continuously increased until the water regulating valve is regulated to the maximum opening degree. If the water regulating valve is regulated to the maximum opening degree, the noise of the water heater is still larger than the specified noise value, and the abnormal fault of the water regulating valve is prompted. The opening degree of the water regulating valve is increased by 50-200 steps each time, and the preferred embodiment is 100 steps. By adjusting the opening degree to be large, the water flow can flow stably.
The step S4 also includes that after the rotating speed of the fan of the water heater is increased, the step S2 or/and the step S3 are/is returned until the rotating speed of the fan of the water heater reaches the maximum speed increase, if the wind pressure of the water heater is still unstable, the step S5 is carried out; step S5 includes increasing the segmentation of the water heater fire rows and keeping the total load constant, so that the load of each burning water heater fire row is reduced and the oxygen supply requirement is reduced.
When the same load is used, the larger the subsection is, the more the fire rows are burned, the smaller the flame of each fire row is, and the smaller the oxygen consumption amount is, so that when the combustion is unstable and the oxygen supply is insufficient, the more the subsections are added to the fire rows of the water heater, the oxygen demand can be reduced, and the water heater can continue stable combustion.
Step S5 further includes, if the hot water bank is not in the current maximum segment and the same load exists in the segment of the first-gear higher than the current segment, increasing the segment of the hot water bank and keeping the total load unchanged.
Step S5 further includes, if the fire grate of the water heater is increased to the maximum segment, or the segment with the first gear has no load the same as the current segment, and the oxygen supply of the water heater is still insufficient, turning down the gas proportional valve to make the outlet water temperature of the water heater less than the set temperature by T degrees. The value range of T is 1-3, and the preferred value of the embodiment is 2. Therefore, the outlet water temperature is properly reduced, the whole load of the water heater is reduced by reducing the proportional valve, the consumption of oxygen is reduced, the combustion of the water heater tends to be stable, and the potential safety hazard caused by the increase of the concentration of CO due to high-load work when the oxygen is insufficient is avoided.
Step S5 further comprises, after the gas proportional valve is reduced, continuing to judge whether the water heater is normal in wind pressure through a noise detection method or a wind pressure detection method; and if the water heater is judged to be still lack of oxygen, prompting the fault of the air pressure system of the water heater. Thus reminding the user to check whether the smoke tube is blocked or whether the primary gas pressure is too high.
In this embodiment, step S5 further includes, if the fire grate of the water heater is increased to the maximum segment, or the segment with the first gear has no load the same as the current segment, and the water heater is still unstable in combustion, decreasing the opening of the water regulating valve of the water flow control device, decreasing the water flow, and decreasing the load of the water heater. Therefore, the oxygen demand can be reduced, and the combustion of the water heater tends to be stable.
Reducing the water flow by 0.5L/min each time, then judging whether the water heater is stable in combustion, if not, continuing to reduce the water flow until the water flow is reduced to a specified flow value of 2.5L/min, and if the water heater is still unstable in combustion at the moment, prompting the fault of a wind pressure system of the water heater.
In this embodiment, step S2 specifically includes: and continuously acquiring a noise detection value of the current subsection of the fire grate of the water heater, and if the noise detection value is larger than a noise specified value of the current subsection and the fluctuation amplitude of the noise detection value is larger than a specified noise amplitude threshold value, judging that the oxygen supply of the water heater is insufficient and the combustion is unstable. When the noise detection value exceeds the standard and the fluctuation amplitude is too large, the wind pressure of the water heater is indicated to be abnormal, so that insufficient oxygen supply of the water heater can be caused, and the combustion is unstable.
The method for continuously acquiring the fire-exhaust noise detection value of the current sectional water heater comprises the following steps: a set of noise value data is sampled every 5 seconds, and an average value A of the set of noise value data and a difference value Delta A between a maximum value and a minimum value are obtained.
In this embodiment, a noise value data is collected every 0.5 second, and the latest 10 noise value data are sampled to obtain a set of noise value data including 10 latest sampling values.
The method for judging unstable oxygen supply insufficient combustion of the water heater comprises the following steps: and judging that the average value A is larger than the noise specified value of the current gear, and the difference value delta A is larger than the noise amplitude threshold value. The value range of the noise amplitude threshold is 8-15dB, and the value range of the noise amplitude threshold is preferably 10 dB.
In this embodiment, step S3 further includes: and after the outlet water temperature of the water heater is stable, continuously acquiring a wind pressure detection value of a water heater air channel, and if the fluctuation amplitude of the wind pressure detection value is larger than a specified wind pressure amplitude threshold value, judging that the wind pressure of the water heater is unstable.
The method for continuously acquiring the wind pressure detection value of the air duct of the water heater comprises the following steps: and sampling a group of wind pressure value data every 5 seconds, and calculating the difference value delta B between the maximum value and the minimum value.
The method for sampling a group of wind pressure value data every 5 seconds comprises the following steps: and collecting a wind pressure value data every 0.5 second, and sampling the latest 10 wind pressure value data to obtain a group of wind pressure value data containing 10 latest sampling values. The method for judging unstable wind pressure of the water heater comprises the following steps: and judging that the difference value delta B is larger than the wind pressure amplitude threshold value.
In step S4, the method for increasing the rotation speed of the fan of the water heater includes: the rotating speed of the fan of the water heater is increased by 50-200r/min each time, the rotating speed of the fan of the water heater is preferably 100r/min in the embodiment, the rotating speed of the fan of the water heater is increased by 2-10 times at most, and the rotating speed of the fan of the water heater is preferably 5 times in the embodiment, namely the rotating speed of the fan of the water heater is increased by 500r/min at most.
As shown in figure 2, the water heater fire row is provided with three-stage sections, including two sections, four sections and six sections, wherein the two sections are provided with two rows of flames, the four sections are provided with four rows of flames, and the six sections are provided with six rows of flames. In fig. 2, PL indicates the minimum load that is the minimum opening degree of the stepwise small proportional valve, and PH indicates the maximum load that is the maximum opening degree of the stepwise small proportional valve.
Noise set value corresponding to each stage of section, noise estimate value A of section load compared with said stage05-20dB larger, preferably 10dB for this embodiment. And after the water outlet temperature of the water heater is stable, calculating according to the current sectional load matching to obtain a noise estimation value.
In this embodiment, the noise estimation value of the minimum load of the two segments is 40dB, the noise estimation value of the maximum load is 46dB, and the value range of the noise estimation value of the two segments is 40-46 dB.
The noise estimation value of the minimum load of the four segments is 42dB, the noise estimation value of the maximum load is 50dB, and the value range of the noise estimation value of the four segments is 42-50 dB.
The noise estimation value of the minimum load of the six segments is 45dB, the noise estimation value of the maximum load is 55dB, and the value range of the noise estimation value of the load of the six segments is 45-55 dB.
The minimum load of the two sections is 2-4kw, and the embodiment is preferably 3 kw; the maximum load is 6-8kw, preferably 7kw in this embodiment.
The minimum load of the four segments is 5-7kw, and the preferred embodiment is 6 kw; the maximum load is 12-14kw, preferably 13kw in this embodiment.
The minimum load of the six segments is 9-11kw, and the preferred embodiment is 10 kw; the maximum load is 22-24kw, preferably 23kw in this embodiment.
In this embodiment, the maximum load proportional valve opening of different segments of the fire grate of the water heater is consistent, and the minimum load proportional valve opening is also consistent. The number of combustion rows is controlled by a solenoid valve.
Before the step S1, detecting whether the air duct of the water heater is unblocked or not before igniting the water heater, and if so, igniting the water heater to start burning. After the fan is started and the air channel is unobstructed, the air channel generates air pressure towards the smoke tube, the air pressure value is larger than 69pa, the air pressure switch 3 judges that the air pressure is normal, and the air channel is unobstructed; if the wind pressure is less than 25pa, the wind pressure is judged to be abnormal, the wind channel is blocked, and an alarm is given.
The method flow of this embodiment is specifically as follows:
firstly, before the water heater is ignited, whether the air duct of the water heater is unblocked is detected, and if yes, the water heater is ignited to start burning.
Then, judging whether a water pump or a water regulating valve of the water heater is normal, and if the water pump is abnormal, adjusting the power of the water pump to enable the generated noise to be normal; if the water regulating valve is abnormal, the opening degree of the water regulating valve is adjusted, so that the water flow tends to be stable. If the water pump and the water regulating valve are normal and no abnormal noise exists, the noise value and the wind pressure value of the water heater can be continuously detected;
secondly, continuously acquiring the current segmented noise detection value of the fire grate of the water heater after the water outlet temperature of the water heater is stable; and detecting the noise value every 0.5s, sampling the latest 10 noise values to form a group of sampling data, and acquiring the group of sampling data in 5 s. Updating the sampling data every 0.5s, discarding the sampling data before 5s, adding the latest 10 noise values into the sampling data, calculating the average value of the 10 noise values in the latest sampling data to obtain A, wherein the maximum value is Amax, the minimum value is Amin, and if A is A, the maximum value is Amax, and the minimum value is Amin>A0+10dB, and Amax-Amin>10dB, judging that the wind pressure is unstable, the oxygen supply is insufficient, and the combustion is not stable;
or, continuously collecting a wind pressure detection value of the water heater; and detecting the wind pressure value every 0.5s, sampling the latest 10 wind pressure values to form a group of sampling data, and acquiring a group of sampling data in 5 s. Updating the sampling data every 0.5s, discarding the sampling data before 5s, adding the latest 10 wind pressure values into the sampling data, calculating the average value of the 10 wind pressure values in the latest sampling data to obtain B, wherein the maximum value is Bmax, the minimum value is Bmin, and if Bmax-Bmin is more than 10Pa, judging that the wind pressure is unstable, the oxygen supply is insufficient, and the combustion is stopped to be unstable.
And then increasing the rotating speed of the fan by 100r/min, continuously detecting the noise value and the wind pressure value, and increasing the rotating speed of the fan by 100r/min again and increasing the rotating speed of the fan by 5 times at most if the wind pressure is still unstable.
If the wind pressure is still unstable, increasing the segmentation of the water heater fire grate, keeping the total load unchanged, reducing the load of each burning water heater fire grate, then detecting the noise value and the wind pressure value of the water heater, and judging whether the oxygen supply of the water heater is insufficient, and the combustion is interrupted and unstable;
if the fire grate of the water heater is increased to the maximum section, or the section with the first gear higher has no load the same as that of the current section, the oxygen supply of the water heater is still sufficient and the combustion is stable, the gas proportional valve is turned down to reduce the water outlet temperature of the water heater by 2 degrees compared with the set temperature, then the noise value and/or the wind pressure value of the water heater are continuously detected, if the oxygen deficiency and the combustion are not stable, the wind pressure system of the water heater is prompted to break down, and a user is reminded to check whether the smoke pipe is blocked or whether the primary gas pressure is too high. Or, reducing the water flow by 0.5L/min each time, then judging whether the water heater is stable in combustion, if not, continuously reducing the water flow until the water flow is reduced to a specified flow value of 2.5L/min, and if the water heater is still unstable in combustion at the moment, prompting the fault of a wind pressure system of the water heater.
Example two:
a second embodiment of the present invention provides a water heater, as shown in fig. 3, including a water heater body 1, a noise detection unit 2, a wind pressure sensor 3, a fan 4, a controller, and a water flow control device 5, where the noise detection unit 2, the controller, the wind pressure sensor 3, the fan 4, and the water flow control device 5 are all disposed on the water heater body 1; the noise detecting unit 2 detects the noise of water heater, and the wind pressure value in the wind channel of water heater is detected to wind pressure sensor 3, and the controller is according to noise detecting unit 2 and wind pressure sensor 3's detected value, controls the operating condition of the fire row of water heater body, fan and rivers controlling means 5.
The water flow control device 5 comprises a water pump 51 and a water adjusting valve 52, and the water pump 51 and the water adjusting valve 52 are arranged on a water inlet pipeline of the water heater body 1.
With the above structure, the controller controls the working conditions of the fan 4, the fire grate, the water pump 51 and the water transfer valve 52 according to the control method of the water heater provided in the first embodiment, so that the water heater can be stably combusted, whether the water pump 51 and the water transfer valve 52 are abnormal is judged, and noise interference of the water pump 51 and the water transfer valve 52 is reduced.
The method for controlling the second water heater in this embodiment adopts the method provided in the first embodiment, and details are not described here.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (51)
1. A control method of a water heater, a fire grate of the water heater is provided with a plurality of sections, and the method is characterized by comprising the following steps:
s1, judging whether the water flow control device of the water heater is normal, if so, entering the step S2 or/and S3;
s2, detecting the noise value of the water heater in the current segment, and judging whether the water heater is stably combusted according to the noise value; if not, go to step S4;
s3, detecting the wind pressure value of the water heater air duct, and judging whether the wind pressure of the water heater is stable and whether the combustion is stable according to the wind pressure value; if not, go to step S4;
s4, increasing the rotating speed of a fan of the water heater, and increasing the oxygen supply amount to enable the water heater to stably burn;
after increasing the fan speed of the water heater, returning to the step S2 and/or the step S3 until the fan speed of the water heater reaches the maximum acceleration rate, and if the combustion of the water heater is still unstable, entering the step S5; step S5 includes increasing the segments of the water heater fire bank and keeping the total load constant, so that the load of the water heater fire bank per combustion is reduced and the oxygen demand is reduced.
2. The method for controlling a water heater according to claim 1, wherein in step S1, the water flow control device comprises a water pump, and the method for determining whether the water pump is normal comprises: when the wind pressure of the water heater is stable, the noise of the water heater is larger than a noise specified value, the fluctuation amplitude of the noise is larger than a noise amplitude threshold value, and the water flow is unstable, the water pump is judged to be abnormal, otherwise, the water pump is judged to be normal.
3. The method for controlling a water heater according to claim 2, wherein processing the water pump after determining that the water pump is abnormal includes: and reducing the power of the water pump, and then judging whether the water pump is normal again.
4. The method of controlling a water heater according to claim 3, wherein the method of processing the water pump further comprises: when the water heater is in a zero cold water mode, the power of the water pump is proportionally reduced every t1 seconds, whether the water pump is normal or not is judged after reduction every time, and if the water pump is abnormal, the power of the water pump is continuously reduced until the water flow is smaller than a flow specified value.
5. The control method of the water heater according to claim 4, wherein when the water flow is smaller than a flow specified value, the water pump is determined to be still abnormal, and an abnormal fault is prompted to occur in the water pump.
6. The method of controlling a water heater according to claim 4, wherein the method of processing the water pump further comprises: when the water heater is in a user water use pressurization mode, the power of the water pump is proportionally reduced once every t1 seconds, whether the water pump is normal or not is judged after reduction is carried out every time, and if the water pump is abnormal, the power of the water pump is continuously reduced until the water pump is regulated to be shut down.
7. The control method of a water heater according to claim 2, wherein the method of determining whether the water flow in the water heater is stable includes: and detecting the flow value of the water flow, and if the fluctuation amplitude of the flow value is larger than a flow amplitude threshold value, judging that the water flow is unstable.
8. The control method of a water heater according to claim 7, wherein the method of detecting the flow value of the water flow includes: and sampling a group of flow value data every t2 seconds to obtain an average value of the group of flow value data and a difference value delta Q between the maximum value and the minimum value, wherein the delta Q is the fluctuation amplitude of the flow value.
9. The method of controlling a water heater as set forth in claim 8, wherein the method of sampling a set of flow value data every t2 seconds includes: and collecting flow value data every t2/n seconds, and sampling the latest n flow value data to obtain a group of flow value data containing n latest sampling values.
10. The method for controlling a water heater according to claim 1, wherein in step S1, the water flow control device includes a water regulating valve for regulating water flow, and the method for determining whether the water regulating valve is normal includes: if the wind pressure of water heater is stable, just the noise of water heater is greater than the noise specified value, the fluctuation range of noise is greater than noise amplitude threshold value, then judges the water transfer valve is unusual, otherwise judges the water transfer valve is normal.
11. The control method of the water heater according to claim 10, wherein after the water regulating valve is judged to be abnormal, the opening degree of the water regulating valve is increased, then whether the water regulating valve is normal or not is judged, and if not, the opening degree of the water regulating valve is continuously increased until the water regulating valve is regulated to the maximum opening degree.
12. The control method of a water heater according to claim 11, wherein if the water regulating valve is adjusted to the maximum opening degree and the noise of the water heater is still larger than a noise specified value, an abnormal fault of the water regulating valve is prompted.
13. The control method of the water heater as claimed in claim 12, wherein the opening degree of the water regulating valve is increased by 50-200 steps each time.
14. The control method of the water heater according to claim 1, wherein the step S5 further comprises increasing the segment of the water heater fire bank and keeping the total load unchanged if the water heater fire bank is not in the current maximum segment and the same load exists in the segment of the first gear higher than the current segment.
15. The method as claimed in claim 14, wherein the step S5 further comprises turning down the gas proportional valve to make the outlet water temperature of the water heater less than the set temperature by T degrees if the water heater fire grate is increased to the maximum stage or the stage of the first gear has no load same as the current stage and the water heater is still not burning stably.
16. The control method of the water heater according to claim 15, wherein the step S5 further comprises, after the gas proportional valve is turned down, continuing to judge whether the combustion of the water heater is stable through the step S2 or/and the step S3; and if the water heater is judged to be still unstable in combustion, prompting the fault of the air pressure system of the water heater.
17. The method as claimed in claim 16, wherein the step S5 further comprises adjusting the opening of the water adjusting valve of the water flow control device to decrease the water flow and decrease the load of the water heater if the fire grate of the water heater is increased to the maximum stage or the stage of the first gear has no load same as the current stage and the water heater is not burning stably.
18. The control method of the water heater according to claim 17, wherein the water flow is reduced by 0.2-1L/min each time, then whether the combustion of the water heater is stable is judged, if not, the water flow is reduced continuously until the water flow is reduced to a flow specified value.
19. The method as claimed in claim 18, wherein if the water heater is not burning stably when the water flow rate is reduced to the specified flow rate, a wind pressure system failure of the water heater is indicated.
20. The control method of the water heater according to claim 1, wherein the step S2 further comprises: after the outlet water temperature of the water heater is stable, continuously acquiring the noise detection value of the current subsection fire grate of the water heater; and if the noise detection value is larger than the noise specified value of the current segment and the fluctuation amplitude of the noise detection value is larger than the specified noise amplitude threshold value, judging that the wind pressure of the water heater is unstable.
21. The method for controlling a water heater according to claim 20, wherein the method for continuously acquiring the fire-extinguishing noise detection value of the water heater in the current section comprises the following steps: a set of noise value data is sampled every t3 seconds, and an average value A of the set of noise value data and a difference value Delta A between a maximum value and a minimum value are obtained.
22. The method of controlling a water heater as claimed in claim 21, wherein the step of sampling a set of noise value data every t3 seconds comprises: and collecting a noise value data every t1/n seconds, and sampling the latest n noise value data to obtain a group of noise value data containing n latest sampling values.
23. The method for controlling a water heater according to claim 21 or 22, wherein the method for judging the unstable wind pressure of the water heater comprises the following steps: and judging that the average value A is larger than the noise specified value of the current gear, and the difference value delta A is larger than the noise amplitude threshold value.
24. The control method of the water heater according to claim 1, wherein the step S3 further comprises: and after the outlet water temperature of the water heater is stable, continuously acquiring a wind pressure detection value of the water heater air channel, and if the fluctuation amplitude of the wind pressure detection value is larger than a specified wind pressure amplitude threshold value, judging that the wind pressure of the water heater is unstable.
25. The method for controlling a water heater according to claim 24, wherein the method for continuously acquiring the detected value of the wind pressure of the wind channel of the water heater comprises the following steps: and sampling a group of wind pressure value data every t4 seconds, and calculating the difference value delta B between the maximum value and the minimum value.
26. The method of controlling a water heater as claimed in claim 25, wherein the method of sampling a set of wind pressure value data every t4 seconds includes: and collecting a wind pressure value data every t4/n seconds, and sampling the latest m wind pressure value data to obtain a group of wind pressure value data containing n latest sampling values.
27. The method for controlling the water heater according to claim 25, wherein the method for judging the unstable wind pressure of the water heater comprises the following steps: and judging that the difference value delta B is larger than the wind pressure amplitude threshold value.
28. The control method of the water heater according to claim 1, wherein in the step S4, the method for increasing the rotation speed of the fan of the water heater comprises: the rotating speed of the fan of the water heater is increased by 50-200r/min each time, and the rotating speed of the fan of the water heater is increased by 2-10 times at most.
29. The method of controlling a water heater as recited in claim 20, wherein the water heater fire grate is provided with three stages, including two stages, four stages, and six stages.
30. The method as claimed in claim 29, wherein the noise predetermined value corresponding to each segment is 5-20dB greater than the estimated noise value of the segment load in the current segment.
31. The method as claimed in claim 30, wherein the noise estimate is derived from the current segmental load matching estimate after the water heater outlet temperature is stable.
32. The control method of the water heater according to any one of claims 29 to 31, wherein the noise estimate of the two-stage load is 40dB, the noise estimate of the maximum load is 46dB, and the noise estimate of the two-stage load ranges from 40dB to 46 dB.
33. The control method of the water heater according to claim 32, wherein the noise estimate of the minimum load of the four segments is 42dB, the noise estimate of the maximum load of the four segments is 50dB, and the noise estimate of the load of the four segments ranges from 42dB to 50 dB.
34. The control method of the water heater according to claim 33, wherein the noise estimate of the minimum load of the six segments is 45dB, the noise estimate of the maximum load of the six segments is 55dB, and the noise estimate of the load of the six segments ranges from 45dB to 55 dB.
35. The method of controlling a water heater as claimed in any one of claims 29 to 31, wherein the minimum load of the two segments is 2-4kw and the maximum load is 6-8 kw.
36. The method of controlling a water heater as recited in claim 35, wherein the four segments have a minimum load of 5-7kw and a maximum load of 12-14 kw.
37. The control method of a water heater as claimed in claim 36, wherein the minimum load of the six segments is 9-11kw and the maximum load is 22-24 kw.
38. The control method of the water heater according to claim 2, 10 or 20, wherein the noise amplitude threshold value is in a range of 8-15 dB.
39. The method of claim 9, 22 or 26, wherein n is in the range of 5-20.
40. The control method of the water heater according to claim 15, wherein the value range of T is 1-3.
41. The control method of the water heater according to claim 27, wherein the value range of the wind pressure amplitude threshold is 5-20 Pa.
42. The control method of the water heater according to claim 4, wherein t1 has a value in the range of 1-3.
43. The control method of the water heater according to claim 8, wherein t2 has a value ranging from 1 to 10.
44. The control method of the water heater according to claim 21, wherein t3 has a value ranging from 1 to 10.
45. The control method of the water heater according to claim 25, wherein t4 has a value in the range of 1-10.
46. The control method of the water heater according to claim 4 or 6, wherein the ratio is in a range of 5% -20%.
47. The control method of the water heater according to claim 2, wherein the flow amplitude threshold value is in a range of 0.5-2L/min.
48. The control method of the water heater according to claim 1, wherein step S1 is preceded by detecting whether a water heater air duct is unblocked before the water heater is ignited, and if so, igniting the water heater to start burning.
49. The method of claim 48, wherein the method of determining whether the hot water heater is unblocked comprises: detecting the wind pressure generated by the wind channel towards the smoke tube, if the wind pressure is greater than 69Pa, judging that the wind pressure is normal and the wind channel is smooth; if the wind pressure is less than 25pa, the wind pressure is judged to be abnormal, and the air duct is blocked.
50. A water heater, which adopts the control method of the water heater of any one of claims 1 to 49, characterized in that the water heater comprises a water heater body, a noise detection unit, a wind pressure sensor, a fan, a controller and a water flow control device, wherein the noise detection unit, the controller, the wind pressure sensor, the fan and the water flow control device are all arranged on the water heater body; the noise detection unit detects the noise of water heater, the wind pressure sensor detects the wind pressure value in the wind channel of water heater, the controller is according to the noise detection unit with the detected value of wind pressure sensor, control the fire row of water heater body the fan with rivers controlling means's operating condition.
51. The water heater of claim 50, wherein the water flow control device comprises a water pump and a water regulating valve, the water pump and the water regulating valve being disposed on an inlet line of the water heater body.
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| JPH0755137A (en) * | 1993-08-09 | 1995-03-03 | Matsushita Electric Ind Co Ltd | Burner |
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| JPS61225548A (en) * | 1985-03-29 | 1986-10-07 | Rinnai Corp | Hot air flow space heater |
| CN105222362A (en) * | 2015-10-29 | 2016-01-06 | 艾欧史密斯(中国)热水器有限公司 | The control system of gas-fired water heater |
| CN111141031A (en) * | 2018-11-05 | 2020-05-12 | 宁波方太厨具有限公司 | Automatic fault detection method for gas water heater |
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