CN114754497B - Control method of gas water heater, gas water heater and readable storage medium - Google Patents
Control method of gas water heater, gas water heater and readable storage medium Download PDFInfo
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- CN114754497B CN114754497B CN202011607956.XA CN202011607956A CN114754497B CN 114754497 B CN114754497 B CN 114754497B CN 202011607956 A CN202011607956 A CN 202011607956A CN 114754497 B CN114754497 B CN 114754497B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 403
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000007789 gas Substances 0.000 claims abstract description 463
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 148
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 147
- 238000001514 detection method Methods 0.000 claims description 48
- 239000000779 smoke Substances 0.000 claims description 33
- 239000003517 fume Substances 0.000 claims description 16
- 238000004590 computer program Methods 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 abstract description 124
- 239000002912 waste gas Substances 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 22
- 230000002159 abnormal effect Effects 0.000 description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 16
- 229910052760 oxygen Inorganic materials 0.000 description 16
- 239000001301 oxygen Substances 0.000 description 16
- 239000002737 fuel gas Substances 0.000 description 12
- 230000000875 corresponding effect Effects 0.000 description 7
- 230000032683 aging Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 208000001408 Carbon monoxide poisoning Diseases 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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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
-
- 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using fluid fuel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention provides a control method of a gas water heater, the gas water heater and a readable storage medium. The control method of the gas water heater comprises the following steps: acquiring the concentration of carbon monoxide generated by a burner; and controlling the output value of the gas valve according to the concentration of the carbon monoxide. Therefore, the current combustion condition of the gas water heater is judged through the concentration of carbon monoxide, the output value of the gas valve is adjusted, the water heater can be ensured to be maintained in a good combustion condition in the combustion operation process, the phenomenon of insufficient combustion of the gas water heater is avoided, the heat production efficiency is improved, the working stability of gas equipment is ensured, the use safety of a user is improved, the control precision of the gas water heater can be improved, the quantity of waste gas can be effectively reduced, and the gas water heater is more environment-friendly.
Description
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a control method of a gas water heater, a gas water heater and a readable storage medium.
Background
Currently, gas water heaters have become the main hot water supply appliance in the market, however, due to differences in installation environments, such as: poor ventilation environment, abnormal heat value of the fuel gas, backward flow of the smoke exhaust pipe and the like, so that the difference of the air supply pressure and the heat value of the fuel gas is large, the fuel gas water heater cannot maintain to perform combustion operation under good conditions, and the problems of incomplete combustion, vibration combustion and the like are easily caused.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the invention provides a method of controlling a gas water heater.
The second aspect of the invention also provides a gas water heater.
A third aspect of the present invention also provides a readable storage medium.
In view of this, a first aspect of the present invention proposes a control method of a gas water heater including a burner, a gas valve for controlling a gas intake amount of the burner, and a carbon monoxide detection device, the control method of the gas water heater including: acquiring the concentration of carbon monoxide generated by a burner; and controlling the output value of the gas valve according to the concentration of the carbon monoxide.
After receiving a start command of a gas water heater, the invention introduces gas according to an initial output value of the gas valve, a burner starts to burn the gas to heat cold water, and as the gas is continuously burned, a part of the gas is incompletely burned to generate a certain amount of waste gas, the concentration of carbon monoxide in the waste gas is obtained through a carbon monoxide detection device, and whether the current combustion condition of the gas water heater is abnormal or not is judged according to the concentration of the carbon monoxide, namely whether the gas and the air are in a better proportion or not, and then the output value of the gas valve is adjusted to increase or reduce the gas input of the burner. On the one hand, the water heater can be ensured to be maintained in a good combustion condition in the combustion operation process, the phenomenon of insufficient combustion of the gas water heater is avoided, the heat production efficiency is improved, on the other hand, the working stability of gas equipment is ensured, the use safety of a user is improved, the control precision of the gas water heater is improved, the amount of exhaust gas can be effectively reduced, and the environment is protected.
The output value of the gas valve is a gas valve control parameter and is used for adjusting the ventilation quantity of the gas valve. The opening of the gas valve can be adjusted by adjusting the duty ratio, the operating frequency, the pulse width or the pulse amplitude of the gas valve, so as to adjust the output value of the gas valve. Specifically, when the pulse width is fixed, the higher the operating frequency, the larger the gas valve opening, and the larger the gas valve output value. When the operating frequency is fixed, the larger the pulse width is, the larger the opening of the gas valve is, and the larger the gas valve output value is. When the pulse width and the operating frequency are fixed, the higher the duty cycle, the larger the gas valve opening, i.e., pulse width modulation (Pulse Width Modulation, PWM). Likewise, when the pulse width and the operating frequency are fixed, the pulse amplitude, i.e. the pulse amplitude modulation (Pulse Amplitude Modulation, PAM), can also be adjusted.
Specifically, the control method provided by the invention is used for controlling the gas water heater, the gas water heater comprises a shell, a smoke discharging device, a heat exchanger, a combustion chamber, a burner arranged in the combustion chamber, a carbon monoxide (CO) detection device, a gas pipeline connected with the burner, and a gas valve arranged on the gas pipeline. The heat exchanger comprises a water inlet and a water outlet, cold water flows into the heat exchanger from the water inlet, the burner burns fuel gas to output heat, so that the cold water flowing into the heat exchanger is heated to form hot water, and the hot water flows out of the heat exchanger through the water outlet of the heat exchanger. The carbon monoxide detection device is arranged at a position between the burner and the smoke exhaust device, and can detect the concentration of carbon monoxide in the exhaust gas generated by the completion of combustion. The gas valve is capable of adjusting the amount of gas and the ratio of gas to oxygen input to the burner.
According to the control method of the gas water heater provided by the invention, the control method can also have the following additional technical characteristics:
in the above technical solution, further, controlling the output value of the gas valve according to the carbon monoxide concentration includes: and adjusting the output value of the gas valve according to the preset offset based on the fact that the carbon monoxide concentration exceeds the first preset concentration interval.
In the technical scheme, a first preset concentration interval is preset according to carbon monoxide data of the gas water heater in the combustion operation under the good combustion condition. If the currently detected carbon monoxide concentration exceeds a first preset concentration interval, namely, the carbon monoxide concentration is larger than the maximum value of the first preset concentration interval or smaller than the minimum value of the first preset concentration interval, the gas water heater is in an abnormal combustion condition, and the output value of the gas valve is increased or reduced according to the preset offset, so that the air inflow of the burner is increased or reduced, the gas and air are promoted to be fully mixed, the stability of the gas components is ensured, the gas water heater is in a safe working state, the conditions of incomplete combustion and vibration combustion caused by the carbon monoxide concentration are avoided, and the gas water heater is more energy-saving and efficient, and has usability and safety.
Further, if the currently detected carbon monoxide concentration is within the first preset concentration interval, that is, the carbon monoxide concentration is smaller than or equal to the maximum value of the first preset concentration interval and is greater than or equal to the minimum value of the first preset concentration interval, this indicates that the gas water heater is in a good combustion condition at this time, and the output value of the gas valve does not need to be adjusted.
In any of the above technical solutions, further, adjusting the output value of the gas valve according to the preset offset includes: and controlling the output value of the gas valve to rise according to the first preset offset based on the carbon monoxide concentration being greater than or equal to the first concentration threshold.
In the technical scheme, when the currently detected carbon monoxide concentration is determined to be beyond a first preset concentration interval, namely, the gas water heater is in an abnormal combustion condition, the carbon monoxide concentration and a first concentration threshold value are continuously compared. If the concentration of carbon monoxide is greater than or equal to the first concentration threshold, the current concentration of carbon monoxide is too high, so that the problems of different heat value of fuel gas, incomplete combustion of fuel gas and the like may exist, and the yield of hot water is low. At this time, the gas inflow of the gas water heater needs to be increased, and then the output value of the gas valve is controlled to be increased according to the first preset offset, so that the heating requirement is met while the full combustion is promoted. Therefore, when the gas water heater is in an abnormal combustion condition, the gas water heater can perform self-judgment, self-adjustment and self-adaption according to the concentration difference of carbon monoxide, the gas combustion condition is distinguished more efficiently and accurately, the combustion operation of the gas water heater is ensured to be maintained in a good state, the problems of vibration combustion, emission of a large amount of polluted gas after combustion and the like caused by insufficient gas combustion are avoided, and the use safety of the gas water heater is further improved.
The first concentration threshold is larger than the maximum value of the first preset concentration interval.
In any of the above technical solutions, further, adjusting the gas valve output value according to the preset offset includes: and controlling the output value of the gas valve to be reduced according to a second preset offset based on the carbon monoxide concentration being less than or equal to a second concentration threshold.
In the technical scheme, when the currently detected carbon monoxide concentration is determined to be beyond a first preset concentration interval, namely, the gas water heater is in an abnormal combustion condition, the carbon monoxide concentration and a second concentration threshold value are continuously compared. If the concentration of carbon monoxide is less than or equal to the second concentration threshold, it indicates that the current concentration of carbon monoxide is too low, and there may be a problem of insufficient oxygen. At this time, the output value of the gas valve is controlled to be reduced according to the second preset offset, so as to reduce the gas input of the burner, promote full combustion and reduce resource waste. When the gas water heater is in an abnormal combustion condition, the gas water heater can perform self-judgment, self-adjustment and self-adaptation according to the concentration difference of carbon monoxide, the gas combustion condition is distinguished more efficiently and accurately, the combustion operation of the gas water heater is ensured to be maintained in a good state, the problems of vibration combustion, emission of a large amount of polluted gas after combustion and the like caused by insufficient gas combustion are avoided, and the use safety of the gas water heater is further improved.
Wherein the first concentration threshold is greater than the second concentration threshold. The second concentration threshold is less than the minimum value of the first preset concentration interval.
In any of the above solutions, further, the larger the first concentration threshold, the larger the first preset offset; the smaller the second concentration threshold, the larger the second preset offset.
In the technical scheme, the first concentration threshold comprises a plurality of groups of values, the values can be reasonably set according to equipment parameters, operation parameters and the like of the gas water heater, and different first concentration thresholds can correspond to different first preset offset values. And the larger the first concentration threshold value is, the larger the first preset offset amount is, namely, the first concentration threshold value and the first preset offset amount are in positive correlation. Similarly, the second concentration threshold value also includes a plurality of groups of values, which can be reasonably set according to equipment parameters, operation parameters and the like of the gas water heater, and different second concentration threshold values can correspond to the same or different second preset offset values. And the smaller the second concentration threshold value is, the larger the second preset offset amount is, namely, the second concentration threshold value and the second preset offset amount are in a negative correlation. Therefore, the output value of the gas valve can be flexibly adjusted according to the concentration of carbon monoxide, the control precision of the gas water heater is improved, the problem of system control deviation of the gas water heater is avoided or reduced, and the problems of incomplete combustion, vibration combustion, high exhaust emission and the like of the gas water heater are further improved.
In any of the above technical solutions, before adjusting the output value of the gas valve according to the preset offset, the method further includes: obtaining the hot water yield of the gas water heater; a first preset concentration interval is determined from the hot water yield.
In the technical scheme, a corresponding relation between the hot water yield of the gas water heater and a first preset concentration interval is pre-configured, the hot water yield of the gas water heater is detected or calculated before the output value of the gas valve is regulated according to the preset offset, and the first preset concentration interval corresponding to the hot water yield obtained at present is queried through the corresponding relation between the hot water yield and the first preset concentration interval. The method is convenient to judge the current combustion condition of the gas water heater according to the first preset concentration interval and the carbon monoxide concentration, so that the control precision of the gas water heater is improved, the efficiency and stability of the output value adjustment of the gas valve are improved, and the adjustment requirements of different types of gas water heaters and different external environment conditions of the gas water heater can be met.
The larger the hot water outlet rate is, the larger the maximum value and the minimum value of the first preset concentration interval are.
In any of the above technical solutions, further, obtaining the hot water yield of the gas water heater includes: acquiring the water outlet temperature, the water inlet temperature and the water flow rate of the gas water heater; the hot water yield is determined based on the outlet water temperature, inlet water temperature and water flow rate.
In the technical scheme, the difference between the water outlet temperature and the water inlet temperature of the gas water heater is calculated, namely the temperature rise value of the gas water heater. The product of the difference and the water flow rate is the hot water yield. Therefore, the hot water yield can be calculated according to the current outlet water temperature, inlet water temperature and water flow rate of the gas water heater, so that a first preset concentration interval can be flexibly set according to different running states of the gas water heater, misjudgment caused by equipment aging and other problems is reduced, the control precision of the gas water heater is improved, and the efficiency and stability of the adjustment of the output value of the gas valve are ensured.
In any of the above technical solutions, further, the control method of the gas water heater further includes: and controlling the gas water heater to be closed and/or outputting alarm information based on the fact that the output value of the gas valve exceeds the preset output value range.
In the technical scheme, the problems that the output value of the gas valve cannot be adjusted within a preset output value range and the output value of the gas valve is abnormal in adjustment caused by the fact that the gas valve is faulty, the smoke tube is seriously blocked, wrong gas is used, the heat exchanger is blocked or damaged, the burner is damaged and the like are considered. Therefore, the magnitude of the output value of the gas valve is monitored, and when the output value of the gas valve exceeds a preset output value range, namely, the output value of the gas valve is larger than the maximum value allowing the output value of the gas valve to be adjusted or smaller than the minimum value allowing the output value of the gas valve to be adjusted, the condition that the output value of the current gas valve is abnormal is indicated, so that the gas water heater is easily damaged, and potential safety hazards are easily caused. At this time, the gas water heater is controlled to be closed and/or alarm information is output so as to reduce the safety risk and ensure that a user can maintain the gas water heater in time.
Specifically, the maximum value and the minimum value of the output value of the gas valve allowed to be adjusted can be output values when the gas valve is completely opened or closed, and can also be output values corresponding to the opening of the gas valve set according to requirements.
In any of the above technical solutions, further, the control method of the gas water heater further includes: and controlling the gas water heater to be closed and/or outputting alarm information based on the fact that the carbon monoxide concentration exceeds a second preset concentration interval.
In the technical scheme, if the detected concentration of the carbon monoxide exceeds a second preset concentration interval, namely the safe concentration range of the carbon monoxide, the gas water heater is controlled to be closed and/or alarm information is output. And then realize the effective control to the carbon monoxide content that the combustor produced, not only can effectively prevent the gas heater damage, extension gas heater's life can reduce the security risk moreover, ensure that the user can in time maintain gas heater, improve gas heater's security performance.
In any of the above technical solutions, further, the gas water heater further includes a fan, before or after controlling the output value of the gas valve according to the carbon monoxide concentration, further includes: and adjusting the duty ratio of the fan according to the concentration of the carbon monoxide.
In the technical scheme, the duty ratio of the fan can be adjusted according to the concentration of carbon monoxide before or after the output value of the gas valve is adjusted, so that a proper amount of air can be conveyed to the burner through the fan, oxygen required by gas combustion is further met, and the combustion efficiency of the burner is improved.
According to a second aspect of the present invention, there is also provided a gas water heater comprising: a housing; the burner is arranged in the shell; the gas valve is connected with the burner and is used for controlling the gas inflow of the gas water heater; the carbon monoxide detection device is used for acquiring the concentration of carbon monoxide generated by the burner; a memory storing a program or instructions; the processor is connected with the memory, the burner, the carbon monoxide detection assembly and the gas valve, and realizes the steps of the control method of the gas water heater provided by the technical scheme of the first aspect when the processor executes programs or instructions.
In this embodiment, a gas water heater includes a housing, and a burner, a carbon monoxide (CO) detection device, and a gas valve disposed within the housing. The burner burns the fuel gas to output heat so that cold water in the fuel gas water heater is heated to form hot water. The gas valve is capable of adjusting the amount of gas and the ratio of gas to oxygen input to the burner. The carbon monoxide detection device can detect the concentration of carbon monoxide in the waste gas generated after combustion, and judge the current combustion condition of the gas water heater according to the concentration of the carbon monoxide, namely whether the gas inflow of the gas needs to be increased or decreased to the burner, so as to adjust the output value of the gas valve. On the one hand, the water heater can be ensured to be maintained in a good combustion condition in the combustion operation process, the phenomenon of insufficient combustion of the gas water heater is avoided, the heat production efficiency is improved, on the other hand, the control precision of the gas water heater is improved, the amount of exhaust gas can be effectively reduced, and the environment is protected.
Specifically, be connected with the gas pipeline on the combustor, the gas pipeline can carry the gas to the combustor in, installs the gas valve on the gas pipeline, can adjust the proportion of gas and air that gets into in the combustor through the aperture of control gas valve.
In any of the above technical solutions, further, the gas water heater further includes: a heat exchanger comprising a water inlet and a water outlet; the smoke exhausting device is used for collecting and exhausting smoke generated by the burner; the carbon monoxide detection device is positioned between the burner and the outlet of the smoke exhaust device.
In this technical scheme, gas heater still includes heat exchanger and fume extractor. The heat exchanger and the burner are positioned in the combustion chamber of the gas water heater, the heat exchanger comprises a water inlet and a water outlet, cold water flows into the heat exchanger from the water inlet, the burner combusts gas to output heat so that the cold water flowing into the heat exchanger is heated to form hot water, and the hot water flows out of the heat exchanger through the water outlet of the heat exchanger, so that hot water supply is realized. The exhaust passage is communicated with the combustion chamber, waste gas generated by combustion is discharged out of the gas water heater through the exhaust passage, and the carbon monoxide detection device is positioned between the burner and an outlet of the exhaust device, so that the concentration of carbon monoxide generated by the burner can be accurately detected, and the combustion condition of the gas water heater can be judged according to the concentration of the carbon monoxide.
Further, the side wall of the combustion chamber is provided with a through hole for air to enter, and external air can directly enter the combustion chamber through the through hole, so that the effect of supplying oxygen to the burner is achieved.
Specifically, the fume extractor includes communicated fume collecting hood and fume exhaust passage, and the fume produced by the fume collecting hood is collected by the burner and led out to the gas water heater via the fume exhaust passage.
In any of the above technical solutions, further, the gas water heater further includes: the water temperature detection device is connected with the processor, is positioned at the water inlet and the water outlet, and is used for detecting the water inlet temperature and the water outlet temperature of the gas water heater; and the water flow detection device is connected with the processor and is used for detecting the water flow rate of the gas water heater.
In the technical scheme, the gas water heater further comprises a water temperature detection device and a water flow detection device. The water temperature detection device is arranged at the water inlet and the water outlet of the heat exchanger to respectively detect the temperature of cold water entering the heat exchanger and the temperature of hot water flowing out of the heat exchanger. The water flow rate detected by the water flow detection means reflects the flow rate and the flow quantity of the cold water. So as to calculate the hot water yield through outlet water temperature, inlet water temperature and water flow rate, make gas heater can set up first concentration interval in advance in a flexible way according to gas heater's different running state, reduce the misjudgement that equipment ageing scheduling problem caused, and then promote gas heater's control accuracy, guarantee efficiency and the stability to gas valve's output value adjustment.
In any of the above technical solutions, further, the gas water heater further includes: and the fan is connected with the processor and is used for conveying air to the burner.
In the technical scheme, the fan is arranged below the shell, and the fan is powered on to blow air into the combustion chamber, or the fan is arranged above the shell, and the fan is powered on to suck air into the combustion chamber, so that oxygen can be supplied when the burner works. The duty ratio of the fan can be adjusted according to the concentration of carbon monoxide before or after the output value of the gas valve is adjusted, so that a proper amount of air can be conveyed to the burner through the fan, oxygen required by gas combustion is further met, and the combustion efficiency of the burner is improved.
According to a third aspect of the present invention, there is also provided a readable storage medium having stored thereon a program or instructions which, when executed by a processor, perform the control method of the gas water heater set forth in the first aspect. The readable storage medium thus has all the advantages of the control method of a gas water heater as proposed in the first aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 shows a flow diagram of a method of controlling a gas water heater in one embodiment of the invention;
FIG. 2 is a flow chart of a control method of a gas water heater according to still another embodiment of the present invention;
FIG. 3 is a flow chart of a control method of a gas water heater according to still another embodiment of the present invention;
FIG. 4 is a flow chart of a control method of a gas water heater according to still another embodiment of the present invention;
FIG. 5 is a flow chart of a control method of a gas water heater according to still another embodiment of the present invention;
FIG. 6 is a flow chart of a control method of a gas water heater according to still another embodiment of the present invention;
FIG. 7 shows a schematic block diagram of a gas water heater of an embodiment of the present invention;
FIG. 8 shows a schematic structural view of a gas water heater according to an embodiment of the present invention;
FIG. 9 is a flow chart of a method of controlling a gas water heater according to an embodiment of the present invention;
FIG. 10 shows a schematic block diagram of a gas water heater of an embodiment of the present invention;
FIG. 11 is a graph showing the correspondence of gas valve output to hot water yield for an embodiment of the present invention;
Fig. 12 shows a graph of carbon monoxide concentration versus hot water yield for an embodiment of the present invention.
Reference numerals illustrate:
700 gas water heater, 702 combustor, 704 carbon monoxide detection device, 706 gas valve, 708 memory, 710 processor, 712 combustion chamber, 714 fume extractor, 716 heat exchanger, 720 water temperature detection device, 722 water flow detection device, 7142 fume collecting hood, 7144 fume exhaust channel, 7102 system control unit, 7104 gas control unit.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
Methods of controlling a gas water heater, and readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 12.
Example 1:
As shown in fig. 1, according to an embodiment of the present invention, there is provided a control method of a gas water heater including a burner, a carbon monoxide detection device and a gas valve, the method including:
102, obtaining the concentration of carbon monoxide generated by a burner;
and 104, adjusting the output value of the gas valve according to the concentration of the carbon monoxide.
In this embodiment, after receiving a start command of the gas water heater, gas is introduced according to an initial output value of the gas valve, the burner starts to burn the gas to heat cold water, and as the gas is continuously burned, a certain amount of exhaust gas is generated due to incomplete combustion of part of the gas, and the concentration of carbon monoxide in the exhaust gas is obtained through the carbon monoxide detection device, so that whether the current combustion condition of the gas water heater is abnormal or not is judged according to the concentration of carbon monoxide, that is, whether the gas and air are in a better proportion or not, and then the output value of the gas valve is adjusted. On the one hand, the water heater can be ensured to be maintained in a good combustion condition in the combustion operation process, the phenomenon of insufficient combustion of the gas water heater is avoided, the heat production efficiency is improved, on the other hand, the working stability of gas equipment is ensured, the use safety of a user is improved, the control precision of the gas water heater is improved, the amount of exhaust gas can be effectively reduced, and the environment is protected.
The opening of the gas valve can be adjusted by adjusting the duty ratio, the operating frequency, the pulse width or the pulse amplitude of the gas valve, so that the output value of the gas valve can be adjusted. Specifically, when the pulse width is fixed, the higher the operating frequency, the larger the gas valve opening, and the larger the gas valve output value. When the operating frequency is fixed, the larger the pulse width is, the larger the opening of the gas valve is, and the larger the gas valve output value is. When the pulse width and the operating frequency are fixed, the higher the duty ratio is, the larger the gas valve opening is, i.e., pulse width modulation. Likewise, when the pulse width and the operating frequency are fixed, the pulse amplitude, i.e., pulse amplitude modulation, can also be adjusted.
Specifically, as shown in fig. 8, the control method provided by the invention is used for controlling the gas water heater 700, the gas water heater 700 comprises a shell, a smoke exhausting device 714, a heat exchanger 716, a combustion chamber 712, a burner 702 arranged in the combustion chamber 712, a carbon monoxide (CO) detection device 704, a gas pipeline connected with the burner 702, and a gas valve 706 arranged on the gas pipeline. The heat exchanger 716 includes a water inlet from which cold water flows into the heat exchanger 716 and a water outlet from which the burner 702 combusts the combustion gas to output heat to warm the cold water flowing into the heat exchanger 716 to form hot water, which flows out of the heat exchanger 716 through the water outlet of the heat exchanger 716. The carbon monoxide detection device 704 is provided at a position between the burner 702 and the smoke exhaust 714, and is capable of detecting the concentration of carbon monoxide in the exhaust gas generated by the completion of combustion. The gas valve 706 is capable of adjusting the amount of gas and the ratio of gas to oxygen input to the burner 702.
The gas valve 706 may be a proportional valve, such as a proportional solenoid valve, that controls the flow of gas through the gas valve 706 by the voltage across the gas valve 706. The output value of the gas valve 706 of the present embodiment can be understood as the duty cycle of the voltage applied across the gas valve 706. For example, a duty cycle of 80% may be understood as 80% of the time in a cycle is input high (e.g., 20V) and the remaining 20% of the time is input low (e.g., 0V). That is, when the duty ratio is 80%, the output value of the gas valve 706 is 80%. Note that the larger the output value of the gas valve 706, the larger the opening of the gas valve 706, and the larger the gas flow through the gas valve 706. In other embodiments, the gas valve 706 may employ other valves, such as a rotary valve, and the value of the force of the gas valve 706 may be understood as the angle of rotation of the rotary valve.
Example 2:
as shown in fig. 2, according to an embodiment of the present invention, there is provided a control method of a gas water heater, the method including:
step 202, obtaining the concentration of carbon monoxide generated by a burner;
Step 204, if the concentration of carbon monoxide exceeds the first preset concentration range, go to step 206, if not, go to step 202;
And step 206, adjusting the output value of the gas valve according to the preset offset.
In this embodiment, the first preset concentration interval is preset according to carbon monoxide data of the gas water heater at the time of combustion operation under good combustion conditions. If the currently detected carbon monoxide concentration exceeds a first preset concentration interval, namely, the carbon monoxide concentration is larger than the maximum value of the first preset concentration interval or smaller than the minimum value of the first preset concentration interval, the gas water heater is in an abnormal combustion condition, and the output value of the gas valve is increased or reduced according to the preset offset, so that the air inflow of the burner is increased or reduced, the gas and air are promoted to be fully mixed, the stability of the gas components is ensured, the gas water heater is in a safe working state, the conditions of incomplete combustion and vibration combustion caused by the carbon monoxide concentration are avoided, and the gas water heater is more energy-saving and efficient, and has usability and safety.
Further, if the currently detected carbon monoxide concentration is within the first preset concentration interval, that is, the carbon monoxide concentration is smaller than or equal to the maximum value of the first preset concentration interval and is greater than or equal to the minimum value of the first preset concentration interval, this indicates that the gas water heater is in a good combustion condition at this time, and the output value of the gas valve does not need to be adjusted.
It can be understood that the gas water heater comprises video output equipment and/or audio output equipment, when the concentration of carbon monoxide exceeds a first preset concentration interval, prompt information can be output through the video output equipment and/or the video output equipment to prompt a user that the combustion condition of the gas water heater is abnormal, namely, the current combustion efficiency is low, so that the user can check the abnormal reason in time and remove the abnormal reason conveniently, the gas water heater is prevented from being burnt incompletely and in vibration for a long time, the gas water heater is prevented from being damaged, and the human body and the environment are prevented from being damaged.
Example 3:
as shown in fig. 3, according to an embodiment of the present invention, there is provided a control method of a gas water heater, the method including:
Step 302, obtaining the concentration of carbon monoxide generated by a burner;
step 304, if the concentration of carbon monoxide exceeds the first preset concentration interval, go to step 306, if not, go to step 302;
Step 306, if the concentration of carbon monoxide is greater than or equal to the first concentration threshold, go to step 308, if not, go to step 310;
Step 308, controlling the output value of the gas valve to rise according to the first preset offset;
Step 310, if the concentration of carbon monoxide is less than or equal to the second concentration threshold, go to step 312, if not, go to step 314;
step 312, controlling the output value of the gas valve to be reduced according to the second preset offset;
Step 314, outputting prompt information.
In this embodiment, when it is determined that the currently detected carbon monoxide concentration exceeds the first preset concentration interval, i.e. the gas water heater is in an abnormal combustion condition, the comparison of the carbon monoxide concentration and the first concentration threshold is continued. If the concentration of carbon monoxide is greater than or equal to the first concentration threshold, the current concentration of carbon monoxide is too high, so that the problems of different heat value of fuel gas, incomplete combustion of fuel gas and the like may exist, and the yield of hot water is low. At this time, the gas inflow of the gas water heater needs to be increased, and then the output value of the gas valve is controlled to be increased according to the first preset offset, so that the heating requirement is met while the full combustion is promoted. If the concentration of carbon monoxide is less than or equal to the second concentration threshold, it indicates that the current concentration of carbon monoxide is too low, and there may be a problem of insufficient oxygen. At this time, the output value of the gas valve is controlled to be reduced according to the second preset offset, so as to reduce the gas input of the burner, promote full combustion and reduce resource waste. Therefore, when the gas water heater is in an abnormal combustion condition, the gas water heater can perform self-judgment, self-adjustment and self-adaption according to the concentration difference of carbon monoxide, the gas combustion condition is distinguished more efficiently and accurately, the combustion operation of the gas water heater is ensured to be maintained in a good state, the problems of vibration combustion, emission of a large amount of polluted gas after combustion and the like caused by insufficient gas combustion are avoided, and the use safety of the gas water heater is further improved.
Specifically, the first concentration threshold is greater than a maximum value of the first preset concentration interval. The first concentration threshold is greater than the second concentration threshold. The second concentration threshold is less than the minimum value of the first preset concentration interval.
In addition, if the carbon monoxide concentration exceeds the first preset concentration interval, the carbon monoxide concentration is detected to be smaller than the first concentration threshold value and larger than the second concentration threshold value, so that the judgment mechanism of the gas water heater fails, prompt information is output, and the gas water heater is convenient to maintain in time.
Further, the first concentration threshold includes a plurality of groups of values, which can be reasonably set according to equipment parameters, operation parameters and the like of the gas water heater, and different first concentration thresholds can correspond to different first preset offsets. And the larger the first concentration threshold value is, the larger the first preset offset amount is, namely, the first concentration threshold value and the first preset offset amount are in positive correlation. Similarly, the second concentration threshold value also includes a plurality of groups of values, which can be reasonably set according to equipment parameters, operation parameters and the like of the gas water heater, and different second concentration threshold values can correspond to the same or different second preset offset values. And the smaller the second concentration threshold value is, the larger the second preset offset amount is, namely, the second concentration threshold value and the second preset offset amount are in a negative correlation. Therefore, the operation deviation of the gas water heater can be monitored according to the concentration of carbon monoxide, the output value of the gas valve can be flexibly adjusted, the control precision of the gas water heater is improved, and the problems of incomplete combustion, vibration combustion, high exhaust emission and the like of the gas water heater are further improved, so that equipment and personal safety are maintained.
Example 4:
As shown in fig. 4, according to an embodiment of the present invention, there is provided a control method of a gas water heater, the method including:
step 402, obtaining the outlet water temperature, inlet water temperature and water flow rate of a gas water heater;
step 404, determining the hot water yield according to the outlet water temperature, the inlet water temperature and the water flow rate;
step 406, determining a first preset concentration interval according to the hot water yield;
step 408, obtaining the concentration of carbon monoxide generated by the burner;
step 410, if the concentration of carbon monoxide exceeds the first preset concentration range, go to step 412, if not, go to step 408;
And step 412, adjusting the output value of the gas valve according to the preset offset.
In this embodiment, as shown in fig. 12, a correspondence relationship between the hot water yield of the gas water heater and a first preset concentration interval is preconfigured, the hot water yield of the gas water heater is detected or calculated before the output value of the gas valve is adjusted according to the preset offset, and the first preset concentration interval corresponding to the currently obtained hot water yield is queried through the correspondence relationship between the hot water yield and the first preset concentration interval. The method is convenient to judge the current combustion condition of the gas water heater according to the first preset concentration interval and the carbon monoxide concentration, so that the control precision of the gas water heater is improved, the efficiency and stability of the output value adjustment of the gas valve are improved, and the adjustment requirements of different types of gas water heaters and different external environment conditions of the gas water heater can be met.
Further, the difference between the outlet water temperature and the inlet water temperature of the gas water heater, namely the heating value of the gas water heater, is calculated. The product of the difference and the water flow rate is the hot water yield. For example, when the inlet water temperature of the gas water heater is T1, the outlet water temperature of the gas water heater is T2, and the water flow rate of the gas water heater is Qw, the temperature difference Δt=t2-T1 between the inlet water temperature T1 and the outlet water temperature T2 is set, and the hot water yield c1=Δt×qw is set. Therefore, the hot water yield can be calculated according to the current outlet water temperature, inlet water temperature and water flow rate of the gas water heater, so that a first preset concentration interval can be flexibly set according to different running states of the gas water heater, misjudgment caused by equipment aging and other problems is reduced, the control precision of the gas water heater is improved, and the efficiency and stability of the adjustment of the output value of the gas valve are ensured.
The hot water yield of the gas water heater reflects a parameter of the rate at which the heat of combustion of the gas is converted into hot water, and the combustion efficiency of the gas can be characterized by the commercial use of the hot water yield and the gas consumption rate. Specifically, in the case where the current oxygen content satisfies the gas complete combustion demand, the larger the output value of the gas valve, the larger the gas input amount, the larger the heat generated by combustion, and the larger the hot water yield. The above calculation of the hot water yield of the gas water heater is only one example, and the calculation method is not particularly limited as long as it can be used to characterize the efficiency of converting the heat of combustion of gas into hot water.
In addition, since the larger the output value of the gas valve is, the larger the gas intake amount passing through the gas valve is, the larger the generated gas heat is, so that the larger the temperature difference between the inlet water temperature of the gas water heater and the outlet water temperature of the gas water heater is, and the hot water yield can be calculated by the inlet water temperature and the outlet water temperature and the water flow rate passing through the gas water heater, that is, there is a correspondence between the output value of the gas valve and the hot water yield, as shown in fig. 11, the output value of one gas valve corresponds to one hot water yield. The output P of the gas valve is substantially linearly and positively correlated with the hot water yield.
Example 5:
As shown in fig. 5, according to an embodiment of the present invention, there is provided a control method of a gas water heater, the method including:
Step 502, obtaining the concentration of carbon monoxide generated by a burner;
step 504, if the concentration of carbon monoxide exceeds the first preset concentration range, go to step 506, if not, go to step 502;
step 506, adjusting the output value of the gas valve according to the preset offset;
step 508, if the output value of the gas valve exceeds the preset output value range, entering step 510, if not, entering step 502;
and 510, controlling the gas water heater to be turned off and/or outputting alarm information.
In this embodiment, the problem of abnormal regulation of the output value of the gas valve caused by a failure or the like of the gas valve is considered. Therefore, the magnitude of the output value of the gas valve is monitored, and when the output value of the gas valve exceeds a preset output value range, namely, the output value of the gas valve is larger than the maximum value allowing the output value of the gas valve to be adjusted or smaller than the minimum value allowing the output value of the gas valve to be adjusted, the condition that the output value of the current gas valve is abnormal is indicated, so that the gas water heater is easily damaged, and potential safety hazards are easily caused. At this time, the gas water heater is controlled to be closed and/or alarm information is output so as to reduce the safety risk and ensure that a user can maintain the gas water heater in time.
Specifically, the maximum value and the minimum value of the output value of the gas valve allowed to be adjusted can be output values when the gas valve is completely opened or closed, and can also be output values corresponding to the opening of the gas valve set according to requirements.
Example 6:
as shown in fig. 6, according to an embodiment of the present invention, there is provided a control method of a gas water heater, the method including:
Step 602, obtaining the concentration of carbon monoxide generated by a burner;
Step 604, if the concentration of carbon monoxide exceeds the second preset concentration range, go to step 606, if not, go to step 608;
Step 606, controlling the gas water heater to be turned off and/or outputting alarm information;
Step 608, if the concentration of carbon monoxide exceeds the first preset concentration range, go to step 610, if not, go to step 602;
Step 610, adjusting the output value of the gas valve according to the preset offset, and adjusting the duty ratio of the fan according to the concentration of carbon monoxide.
In this embodiment, if the currently detected carbon monoxide concentration is detected to be beyond the second preset concentration interval, that is, the safe concentration range of carbon monoxide, the gas water heater is controlled to be turned off and/or alarm information is output. And then realize the effective control to the carbon monoxide content that the combustor produced, not only can effectively prevent the gas heater damage, extension gas heater's life can reduce the security risk moreover, ensure that the user can in time maintain gas heater, improve gas heater's security performance. And the duty ratio of the fan can be adjusted according to the concentration of carbon monoxide before or after the output value of the gas valve is adjusted, so that a proper amount of air can be conveyed to the burner through the fan, oxygen required by gas combustion is further met, and the combustion efficiency of the burner is improved.
For example, when the concentration of carbon monoxide is greater than or equal to the first concentration threshold, the output value of the gas valve is controlled to be increased according to the first offset to increase the introduction amount of the gas, and at this time, the duty ratio of the fan can be reduced according to the third offset to reduce the amount of oxygen delivered to the burner, so that the ratio of the gas to the oxygen can be ensured to promote complete combustion while reducing the flue gas generated by the burner, and the combustion efficiency is improved.
Further, when the detected carbon monoxide concentration exceeds a second preset concentration interval, carbon monoxide conversion arranged in the gas water heater can be started to reflect partial carbon monoxide conversion into carbon dioxide, so that the concentration of carbon monoxide discharged out of the gas water heater is reduced, explosion, carbon monoxide poisoning and other risks are prevented, and personal safety is further ensured.
In addition, the gas water heater 700 further includes: an alarm device (not shown) electrically connected to the processor 710; the processor 710 is further configured to control the alarm device to output alarm information according to the carbon monoxide concentration and/or the fan output value, and prompt a user to perform anomaly detection and remove anomaly problems.
Example 7:
As shown in fig. 7, according to an embodiment of the second aspect of the present invention, there is provided a gas water heater 700 including: a burner 702, a carbon monoxide detection device 704, a gas valve 706, a memory 708, and a processor 710.
In detail, the burner 702 is disposed in the housing of the gas water heater 700, and the burner 702 burns the gas to output heat, so that cold water in the gas water heater 700 is heated to form hot water. A carbon monoxide detection device 704 is located above the burner 702, the carbon monoxide detection device 704 being configured to detect the concentration of carbon monoxide produced by the burner 702. A gas valve 706 is connected to the burner 702, the gas valve 706 being used to control the amount of gas intake of the gas water heater 700. The processor 710, when executing the programs or instructions, performs the following steps: obtaining a concentration of carbon monoxide produced by the burner 702; the output value of the gas valve 706 is adjusted based on the carbon monoxide concentration.
In this embodiment, the carbon monoxide concentration in the exhaust gas generated by the combustion completion can be detected by the carbon monoxide detection device 704, and the current combustion condition of the gas water heater 700, that is, whether the gas intake amount of the burner 702 needs to be increased or decreased, is determined according to the carbon monoxide concentration, so as to adjust the output value of the gas valve 706. On the one hand, can ensure that the water heater maintains at good combustion condition at the in-process of combustion operation, avoid gas heater 700 to appear burning insufficient phenomenon, improve the generating efficiency, on the other hand, can guarantee the job stabilization nature of gas equipment, improve user's safety in utilization, improve the control accuracy of gas heater 700, can effectively less waste gas volume, more environmental protection.
Specifically, a gas pipe is connected to the burner 702, and can convey gas into the burner 702, a gas valve 706 is installed on the gas pipe, and the ratio of gas and air entering the burner 702 can be adjusted by controlling the opening of the gas valve 706.
Example 8:
As shown in fig. 8, according to one embodiment of the present invention, the features defined in any of the above embodiments are included, and further: the gas water heater 700 further includes: a combustion chamber 712, a heat exchanger 716 and a smoke evacuation device 714.
In this embodiment, the combustion chamber 712 is configured to house the burner 702, thereby providing sufficient space for gas combustion and preventing burning of other components within the gas water heater 700 due to flame overflow. And the combustion chamber 712 is communicated with the smoke exhausting device 714, so that smoke generated by the combustion of the gas is exhausted out of the gas water heater 700 through the smoke exhausting device 714, and the use safety of the gas water heater 700 is improved.
The heat exchanger 716 and the burner 702 are positioned in the combustion chamber 712 of the gas water heater 700, the heat exchanger 716 comprises a water inlet and a water outlet, cold water flows into the heat exchanger 716 from the water inlet, the burner 702 combusts the gas to output heat so that the cold water flowing into the heat exchanger 716 is heated to form hot water, and the hot water flows out of the heat exchanger 716 through the water outlet of the heat exchanger 716, thereby realizing hot water supply. The fume extractor 714 is communicated with the combustion chamber 712, the waste gas generated by combustion is discharged out of the gas water heater 700 through the fume extractor 714, and the carbon monoxide detection device is positioned between the burner 702 and the outlet of the fume extractor 714, so that the concentration of the carbon monoxide generated by the burner 702 can be accurately detected, and the combustion condition of the gas water heater 700 can be conveniently judged according to the concentration of the carbon monoxide.
Specifically, the smoke evacuation device 714 includes a smoke collection hood 7142 and a smoke evacuation channel 7144 in communication with each other. The smoke generated by the burner 702 is collected through the smoke collecting hood 7142, so that the scattered smoke is concentrated, the carbon monoxide concentration in the smoke is detected by the carbon monoxide detection device, and the smoke can be placed to overflow, so that the influence of the smoke on the environment or the human body is reduced. And the smoke collected by the smoke collecting hood 7142 is guided out in a directional way through the smoke discharging channel 7144, so that the outward diffusion of the smoke discharged out of the gas water heater 700 is prevented, and the smoke is conveniently subjected to centralized treatment.
Specifically, the carbon monoxide detection device can be arranged in the fume collecting hood 7142 and also can be arranged in the fume exhaust channel 7144, so that the accuracy of carbon monoxide concentration detection is improved, the combustion condition of the gas water heater 700 is favorably judged according to the concentration of carbon monoxide, the gas water heater 700 is convenient to accurately control, the amount of waste gas can be effectively reduced, and the environment is protected.
Example 9:
According to an embodiment of the invention, comprising the features defined in any of the embodiments above, and further: the gas water heater also comprises a water temperature detection device and a water flow detection device.
In detail, the water temperature detection device and the water flow detection device are both connected with the processor. The water temperature detection device is positioned at the water inlet and the water outlet of the heat exchanger to collect the water inlet temperature and the water outlet temperature of the gas water heater. The water flow detection device is configured to detect a water flow rate of the gas water heater.
In this embodiment, the water temperature detecting means is provided at the water inlet and the water outlet of the heat exchanger to detect the temperature of the cold water entering the heat exchanger and the temperature of the hot water exiting the heat exchanger, respectively. The water flow detection device can be arranged at the water inlet, and the water flow rate detected by the water flow detection device reflects the flow speed and the flow quantity of cold water. So as to calculate the hot water yield through outlet water temperature, inlet water temperature and water flow rate, make gas heater can set up first concentration interval in advance in a flexible way according to gas heater's different running state, reduce the misjudgement that equipment ageing scheduling problem caused, and then promote gas heater's control accuracy, guarantee efficiency and the stability to gas valve's output value adjustment.
Example 10:
According to an embodiment of the invention, comprising the features defined in any of the embodiments above, and further: the gas water heater also comprises a fan.
In detail, a blower is connected to the processor, the blower being configured to deliver air to the burner.
In this embodiment, the blower is disposed below the housing, and the blower is operated to blow air into the combustion chamber, or the blower is disposed above the housing, and the blower is operated to suck air into the combustion chamber, thereby supplying oxygen to the burner when it is operated. The duty ratio of the fan can be adjusted according to the concentration of carbon monoxide before or after the output value of the gas valve is adjusted, so that a proper amount of air can be conveyed to the burner through the fan, oxygen required by gas combustion is further met, and the combustion efficiency of the burner is improved.
Further, under the condition that the fan is arranged above the shell, the side wall of the combustion chamber is provided with a through hole for air to enter, and external air can directly enter the combustion chamber through the through hole, so that the effect of supplying oxygen to the combustor is achieved.
Example 11:
As shown in fig. 9, according to an embodiment of the present invention, a control method for improving combustion performance and safety of a water heater is provided, including:
Step 802, controlling the operation of the gas water heater;
step 804, detecting the concentration h of carbon monoxide;
Step 806, if the concentration H belongs to the first preset concentration interval H2, the step 802 is entered, if not, the step 808 is entered;
Step 808, if the concentration H belongs to the second preset concentration interval H1, the step 810 is entered, if not, the step 812 is entered;
Step 810, adjusting the output value P of the gas valve = the output value P of the gas valve-a preset offset dP;
step 812, adjusting the output value P of the gas valve=the output value P of the gas valve+the preset offset dP;
step 814, if the output value of the gas valve is greater than the upper output value limit or less than the lower output value limit, go to step 816, if not, go to step 802;
Step 816, the gas water heater is shut down and/or alerted.
As shown in fig. 10, the gas water heater includes a processor 710, a water temperature detecting device 720, a water flow detecting device 722, and a carbon monoxide detecting device 704, wherein the processor 710 includes a system control unit 7102 and a gas control unit 7104. Further, as shown in fig. 8, the carbon monoxide detection device (not shown) is optimally installed between the heat exchanger 716 and the outlet of the smoke exhaust device 714, i.e., in the smoke collecting hood 7142 or the smoke exhaust channel 7144.
Specifically, the output value of the gas valve is adjusted through the detected carbon monoxide concentration h, so that the water heater is ensured to have good combustion conditions in the combustion operation process, the safety of equipment and users is further ensured, and the safety and usability are improved.
As shown in fig. 11, the correspondence of the gas valve control output value P required for hot water yield was verified by a test in advance, and the correspondence was designed and implanted into the system control unit.
When the water heater is operated by combusting fuel gas, the carbon monoxide concentration h is detected first, and the corresponding range of the carbon monoxide concentration h is calculated according to fig. 12.
H=h2 (first preset concentration interval): the combustion operation is in a good state and the operation is continued.
H=h1 (minimum value H1 smaller than the first preset concentration interval): p=p-dP is adjusted to maintain the combustion operation in a good state.
H=h3 (greater than the maximum value H2 of the first preset concentration interval): p=p+dp is adjusted to maintain the combustion operation in a good state.
When P > P_max (upper limit of the output value of the gas valve) or P < P_min (lower limit of the output value of the gas valve), the output value P of the gas valve exceeds a threshold value allowing the output value of the gas valve to be adjusted, the water heater stops running and/or alarms.
In the embodiment, the control method is used for controlling the water heater, so that the problems of poor ventilation environment, different heat value of fuel gas, reverse air flow of the smoke exhaust pipe and the like can be solved. The problems of incomplete combustion, vibration combustion and the like are easy to be caused.
Example 12:
according to an embodiment of the third aspect of the present invention, there is provided a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement the control method of a gas water heater as in any of the embodiments described above, thereby having all the advantageous technical effects of the control method of a gas water heater as in any of the embodiments described above.
Among them, readable storage media such as Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, and the like.
It should be understood that the invention is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. The method processes of the present invention are not limited to the specific steps described and shown, but various changes, modifications and additions, or the order between steps may be made by those skilled in the art after appreciating the spirit of the present invention.
It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. The present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.
In the present invention, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A control method of a gas water heater, characterized in that the gas water heater comprises a burner, a gas valve and a carbon monoxide detection device, the gas valve is used for controlling the gas inflow of the burner, and the control method of the gas water heater comprises the following steps:
Acquiring the concentration of carbon monoxide generated by the burner;
controlling the output value of the gas valve according to the carbon monoxide concentration;
The controlling the output value of the gas valve according to the carbon monoxide concentration comprises the following steps: based on the carbon monoxide concentration exceeding a first preset concentration interval, adjusting the output value according to a preset offset;
Before the force output value is adjusted according to the preset offset, the method comprises the following steps:
Obtaining the hot water yield of the gas water heater;
determining the first preset concentration interval according to the hot water yield;
The obtaining of the hot water yield of the gas water heater comprises the following steps:
Acquiring the water outlet temperature, the water inlet temperature and the water flow rate of the gas water heater;
Calculating the outlet water temperature, the inlet water temperature and the water flow rate, and determining the hot water yield.
2. The control method of a gas water heater according to claim 1, wherein the adjusting the output value according to a preset offset includes:
and controlling the output value to rise according to a first preset offset based on the carbon monoxide concentration being greater than or equal to a first concentration threshold.
3. The control method of a gas water heater according to claim 2, wherein the adjusting the output value according to a preset offset includes:
controlling the output value to be reduced according to a second preset offset based on the carbon monoxide concentration being less than or equal to a second concentration threshold;
Wherein the first concentration threshold is greater than the second concentration threshold.
4. A control method of a gas water heater according to claim 3, wherein,
The larger the first concentration threshold value is, the larger the first preset offset amount is;
the smaller the second concentration threshold, the larger the second preset offset.
5. The control method of a gas water heater according to any one of claims 1 to 4, further comprising:
and controlling the gas water heater to be turned off and/or outputting alarm information based on the output value exceeding the preset output value range.
6. The control method of a gas water heater according to any one of claims 1 to 4, further comprising:
and controlling the gas water heater to be closed and/or outputting alarm information based on the fact that the carbon monoxide concentration exceeds a second preset concentration interval.
7. The control method of a gas water heater according to any one of claims 1 to 4, further comprising a fan, before or after controlling an output value of the gas valve according to the carbon monoxide concentration, comprising:
and adjusting the duty ratio of the fan according to the carbon monoxide concentration.
8. A gas water heater, comprising:
A housing;
The burner is arranged in the shell;
The gas valve is connected with the burner and is used for controlling the gas inflow of the gas water heater;
the carbon monoxide detection device is used for acquiring the concentration of carbon monoxide generated by the burner;
A memory storing a program or instructions;
A processor connected to the memory, the carbon monoxide detection device and the gas valve, wherein the processor executes the program or instructions to implement the steps of the control method of the gas water heater according to any one of claims 1 to 7.
9. The gas water heater as recited in claim 8, further comprising:
the heat exchanger is arranged in the shell and comprises a water inlet and a water outlet;
the smoke exhaust device is arranged in the shell and is used for collecting and exhausting smoke generated by the burner;
the carbon monoxide detection device is located between the burner and the outlet of the fume extractor.
10. The gas water heater as recited in claim 9, further comprising:
The water temperature detection device is connected with the processor and is positioned at the water inlet and the water outlet, and the water temperature detection device is used for detecting the water inlet temperature and the water outlet temperature of the gas water heater;
and the water flow detection device is connected with the processor and is used for detecting the water flow rate of the gas water heater.
11. The gas water heater as recited in claim 9, further comprising:
and the fan is connected with the processor and is used for conveying air to the burner.
12. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, performs the steps of the control method of a gas water heater as claimed in any one of claims 1 to 7.
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| JP2002162033A (en) * | 2000-11-27 | 2002-06-07 | Noritz Corp | Trouble diagnosis/support apparatus for hot water heater |
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| CN110081613A (en) * | 2019-04-15 | 2019-08-02 | 青岛经济技术开发区海尔热水器有限公司 | Control method of gas water heater and gas water heater |
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