CN114963569A - Gas water heater control method and gas water heater - Google Patents
Gas water heater control method and gas water heater Download PDFInfo
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- CN114963569A CN114963569A CN202210605294.5A CN202210605294A CN114963569A CN 114963569 A CN114963569 A CN 114963569A CN 202210605294 A CN202210605294 A CN 202210605294A CN 114963569 A CN114963569 A CN 114963569A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 191
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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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- 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
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/112—Preventing or detecting blocked flues
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/242—Pressure
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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
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
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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
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/345—Control of fans, e.g. on-off control
- F24H15/35—Control of the speed of fans
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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
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/395—Information to users, e.g. alarms
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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
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
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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
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/443—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using a central controller connected to several sub-controllers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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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)
- Computer Hardware Design (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a water heater control method and a gas water heater. The method comprises the following steps: the method comprises the steps of determining the operation stage of the gas water heater, determining the first wind pressure value range of the gas water heater which is not blocked in the operation stage, obtaining the wind pressure value collected by a wind pressure sensor in the operation stage, and determining the position of the gas water heater which is blocked based on the wind pressure value and the first wind pressure value range. This application can confirm the gas water heater according to the wind pressure value of the side of admitting air of the fan of gas water heater and take place the concrete position of jam to thereby can fix a position fault location fast and inspect, maintain the part of this position, avoid checking the problem that leads to work load big to whole runners, work load when having reduced the maintenance has reduced cost of maintenance.
Description
Technical Field
The invention belongs to the field of gas water heaters, and particularly relates to a control method of a gas water heater and the gas water heater.
Background
The gas water heater takes gas as fuel, transfers heat to cold water in the heat exchanger in a combustion heating mode, and realizes heat exchange with the cold water in the heat exchanger so as to achieve the purpose of preparing hot water. The gas water heater has been developed for many years, has the advantages of convenience in installation, good use safety and the like, and is widely applied to occasions needing hot water, such as bathrooms, kitchens and the like.
In the working process of the strong drum type gas water heater, air is extracted from the outside through the fan, the air is mixed with gas in a pipeline on the air inlet side of the fan, and the mixture is fed into the combustor for combustion through a pipeline on the air outlet side of the fan. In the actual use process, the situation of gas channel blockage often occurs, so that the gas water heater cannot work normally, and even a safety accident occurs.
At present, a wind pressure switch connected with a fan is mostly adopted in the market to judge whether blockage occurs. However, the feedback signal of the wind pressure switch is single, only two states of opening and closing are needed, whether the gas flow channel is blocked can be judged, the specific position where the blockage occurs cannot be determined, after-sale maintenance personnel need to check the whole gas flow channel, and the workload of the after-sale maintenance personnel is increased.
Disclosure of Invention
One of the technical problems to be solved by the present invention is to provide a method for controlling a gas water heater, which can determine the specific position of the gas water heater where the blockage occurs, reduce the workload during maintenance, and reduce the maintenance cost.
Another object of the present invention is to provide a control device for a gas water heater, which can determine the specific position of the gas water heater where the blockage occurs, reduce the workload during maintenance, and reduce the maintenance cost.
The third technical problem to be solved by the invention is to provide a gas water heater, which can determine the specific position of the gas water heater where the blockage occurs, reduce the workload during maintenance and reduce the maintenance cost.
The invention also provides a storage medium, which can determine the specific position of the blockage of the gas water heater, reduce the workload during maintenance and reduce the maintenance cost.
The first technical problem is solved by the following technical scheme:
a control method of a gas water heater is characterized in that a wind pressure sensor is arranged on the air inlet side of a fan of the gas water heater, and the method comprises the following steps:
determining the operation stage of the gas water heater;
determining a first wind pressure value range in which the gas water heater is not blocked in the operation stage;
acquiring a wind pressure value acquired by the wind pressure sensor in the operation stage;
and determining the position of the blockage of the gas water heater based on the wind pressure value and the first wind pressure value range.
The control method of the gas water heater provided by the invention comprises the steps of determining the operation stage of the gas water heater, determining a first wind pressure value range in which the gas water heater is not blocked in the operation stage, acquiring a wind pressure value acquired by a wind pressure sensor in the operation stage, and determining the position of the gas water heater where the gas water heater is blocked based on the wind pressure value and the first wind pressure value range. The gas water heater can be determined according to the wind pressure value of the air inlet side of the fan of the gas water heater to be located at the specific position of blockage, so that the fault position can be rapidly located, parts at the position can be checked and maintained, the problem that the workload is large due to the fact that all runners are checked is avoided, the workload during maintenance is reduced, and the maintenance cost is reduced.
In one embodiment, the determining the position of the blockage of the fan of the gas water heater based on the wind pressure value and the first wind pressure value range comprises:
when the wind pressure value is larger than the maximum value of the first wind pressure value range, determining that the air inlet side of the fan is blocked;
and when the wind pressure value is smaller than the minimum value of the first wind pressure value range, determining that the air outlet side of the fan is blocked.
In one embodiment, the operation phase comprises a pre-purging phase, and the first wind pressure value range of the gas-fired water heater without blockage in the operation phase is determined, and the method comprises the following steps:
and determining a first wind pressure value range in which the gas-fired water heater is not blocked in the pre-sweeping stage.
In one embodiment, the operation phase includes a normal operation phase, and the determining of the first wind pressure value range in which the gas-fired water heater is not blocked in the operation phase includes:
acquiring the rotating speed of the fan in a normal operation stage;
and determining a first wind pressure value range of the gas water heater without blockage based on the rotating speed of the fan.
In one embodiment, the determining the first range of wind pressure values without blockage of the gas water heater based on the rotation speed of the fan comprises:
searching a rated wind pressure value corresponding to the rotating speed from a mapping table of the rotating speed and the rated wind pressure value;
and determining a wind pressure value within a preset range by taking the rated wind pressure value as a center to be used as a first wind pressure value range of the gas water heater without blockage.
In one embodiment, when the operation phase is a normal operation phase, after determining the first wind pressure range value, the method further includes:
determining a second wind pressure value range comprising the first wind pressure value range;
if the wind pressure value is larger than the maximum value of the second wind pressure value range, determining that the air inlet side of the fan is blocked, judging the blocking degree to be serious, and controlling the gas water heater to stop running;
and if the wind pressure value is smaller than the minimum value of the second wind pressure value range, determining that the air outlet side of the fan is blocked, judging the blocking degree to be serious, and controlling the gas water heater to stop running.
In one embodiment, when the operation phase is a normal operation phase and the wind pressure value is greater than the maximum value of the first wind pressure value range, determining that the air inlet side of the fan is blocked comprises:
if the wind pressure value is smaller than or equal to the maximum value of the second wind pressure value range and larger than the maximum value of the first wind pressure value range, determining that the air inlet side of the fan is blocked, judging that the blocking degree of the air inlet side is slight, and sending out an early warning prompt and keeping the normal operation of the gas water heater.
In one embodiment, when the operation phase is a normal operation phase and the wind pressure value is smaller than the minimum value of the first wind pressure value range, determining that the air outlet side of the fan is blocked includes:
if the wind pressure value is larger than or equal to the minimum value of the second wind pressure value range and smaller than the minimum value of the first wind pressure value range, determining that the air outlet side of the fan is blocked, judging that the blocking degree of the air outlet side is slight, and sending out an early warning prompt and keeping the normal operation of the gas water heater.
The second technical problem is solved by the following technical solutions:
the utility model provides a gas water heater controlling means, the side of admitting air of the fan of gas water heater is provided with the wind pressure sensor, the device includes:
the operation stage determining module is used for determining the operation stage of the gas water heater;
the first wind pressure value range determining module is used for determining a first wind pressure value range in which the gas water heater is not blocked in the operation stage;
the wind pressure value acquisition module is used for acquiring a wind pressure value acquired by the wind pressure sensor in the operation stage;
and the blockage position determining module is used for determining the position of the blockage of the gas water heater based on the wind pressure value and the first wind pressure value range.
The third technical problem is solved by the following technical scheme:
a gas water heater comprises a controller, a fan and a wind pressure sensor, wherein the wind pressure sensor is arranged on the air inlet side of the fan, and the controller is electrically connected with the fan and the wind pressure sensor respectively;
the controller includes:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the gas-fired water heater control method as described above.
In one embodiment, the gas water heater further comprises an alarm device, and the alarm device is electrically connected with the controller.
The fourth technical problem is solved by the following technical solutions:
a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, realizes the gas-fired water heater control method as set forth above.
It should be understood that the statements in this section are not intended to identify key or critical features of the embodiments of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1A is a flowchart of a control method for a gas-fired water heater according to an embodiment of the present invention;
FIG. 1B is a logic diagram of a control method for a gas-fired water heater according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control device of a gas water heater according to a second embodiment of the present invention;
fig. 3A is a schematic structural diagram of a gas-fired water heater according to an embodiment of the present invention;
fig. 3B is a schematic structural diagram of a controller according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 1A is a flowchart of a control method for a gas water heater according to an embodiment of the present invention, where the embodiment is applicable to a situation where a specific location of a blockage occurs when the gas water heater is blocked, and a wind pressure sensor is disposed on an air inlet side of a fan of the gas water heater. The strong drum type gas water heater is mainly suitable for, because in prior art, even the wind pressure detection device is installed in the side of giving vent to anger of fan, also can install in flue position department, can only be used for detecting whether the flue blocks up and can't know whether air cleaner blocks up or the combustor blocks up. Because if install on the pipeline between the side of giving vent to anger of fan and the combustor, because this section position is waiting gas mixture, if have extra electrical apparatus circuit and when the precaution is not in place, the danger of blasting the leakage takes place when meeting abnormal conditions such as mars easily. Therefore, the embodiment of the invention is arranged on the air inlet side of the fan, is safe, reliable, simple and easy to realize, and can detect the specific blocking position on the flue. The method can be executed by the control device of the gas water heater provided by the embodiment of the invention, the device can be implemented by software and/or hardware, and is generally configured in a controller of the gas water heater, as shown in fig. 1A, the method specifically includes the following steps:
s101, determining the operation stage of the gas water heater.
The operation phase of the gas-fired hot water boiler generally includes a pre-sweep phase, a normal operation phase and a post-sweep phase. A small amount of gas possibly leaks from the shell of the gas water heater, the gas stays in the shell of the gas water heater, and once the gas water heater meets sparks, explosion is caused to cause serious consequences. In order to avoid the situation, when the gas water heater is started, the fan is firstly operated quickly for a preset time to discharge the gas in the gas water heater, and the process is called as a pre-cleaning stage. And after the front cleaning stage is finished, the ignition device starts to ignite, after a short time delay, the gas valve is opened, the ignition process of the gas water heater is finished, and the gas water heater enters a normal operation stage. Similarly, after the normal operating stage (namely the user stops using hot water, the back is closed to the gas valve), get into the back and clean the stage, the fan continues to operate predetermined length of time, discharges the inside waste heat of gas hot-water furnace, can be for the spare part cooling of gas hot-water furnace, improves the life of spare part, simultaneously, also can discharge the inside remaining gas of hot-water furnace, the incident appears when avoiding starting next time, improves the security.
Illustratively, in the embodiment of the present invention, a field for indicating the current operation stage of the gas water heater is provided in the controller of the gas water heater, and different values of the field may indicate different stages of the current operation of the gas water heater. The controller of the gas water heater can determine the current operation stage of the gas water heater through the current value of the field. It should be noted that the above determining the operation phase of the gas water heater by the field mode is an exemplary description of the embodiment of the present invention, and in other embodiments of the present invention, the operation phase of the gas water heater may also be determined by other modes, and the embodiment of the present invention is not limited herein.
S102, determining a first wind pressure value range in which the gas water heater is not blocked in the operation stage.
In the embodiment of the invention, each operation stage has a corresponding range of wind pressure values which represent the air inlet side of the fan when the gas water heater is not blocked and are called as a first range of wind pressure values. That is, for a certain operation stage, when the gas water heater is in the operation stage, if the wind pressure value of the air inlet side of the fan is within the first wind pressure value range corresponding to the operation stage, it can be considered that the gas water heater is not blocked. For example, the first wind pressure value range may be determined according to historical operating data or experiments, or may be determined according to a rotation speed of the fan, which is not limited herein.
In the embodiment of the invention, after the operation stage of the gas water heater is determined, the first wind pressure value range in which the gas water heater is not blocked in the current operation stage can be determined according to the corresponding relation between the operation stage and the first wind pressure value range.
And S103, acquiring a wind pressure value acquired by a wind pressure sensor in an operation stage.
In the embodiment of the invention, the air inlet side pipeline of the fan of the gas water heater is provided with the air pressure sensor for monitoring the air pressure value in the air inlet side pipeline of the fan. And in the current operation stage, acquiring a wind pressure value acquired by a wind pressure sensor in the operation stage.
And S104, determining the position of the gas water heater, which is blocked, based on the wind pressure value and the first wind pressure value range.
In the embodiment of the invention, after the wind pressure value acquired by the wind pressure sensor in the current operation stage is acquired, and the first wind pressure value range in which the gas water heater is not blocked in the current operation stage is determined, the position of the gas water heater in which the gas water heater is blocked is determined based on the wind pressure value and the first wind pressure value range. For example, if the wind pressure value detected by the wind pressure sensor is within a first wind pressure value range, the blockage is considered to be not blocked; if the wind pressure value detected by the wind pressure sensor is larger than the maximum value of the first wind pressure value range, the air inlet side of the fan is considered to be blocked; and if the wind pressure value detected by the wind pressure sensor is smaller than the minimum value of the first wind pressure value range, the air outlet side of the fan is considered to be blocked. Illustratively, the blockage on the air inlet side of the fan is usually the blockage of an air filter, and the blockage on the air outlet side of the fan is usually the blockage of a burner, a heat exchanger or a discharge flue.
Specifically, when air flows in the pipeline after the fan is started, the air pressure on the air inlet side of the fan is a negative value, and the air pressure value is an absolute value of the air pressure. According to the characteristics of the fan, when the air inlet side or the air outlet side of the fan is blocked, the air flow is reduced, and the air pressure is correspondingly increased. When the air outlet side of the fan is blocked, the air flow of the whole pipeline is reduced, according to the characteristics of the fan, the air pressure value (positive pressure) of the air outlet side of the fan is increased, meanwhile, the air pressure value of the air inlet side of the fan is reduced, when the air outlet side of the fan is completely blocked, the air pressure value of the air outlet side of the fan reaches a peak value, and the air pressure value of the air inlet side of the fan reaches a minimum value; when the air inlet side of the fan is blocked, the gas flow of the whole pipeline can be reduced, according to the characteristics of the fan, the air pressure value of the air inlet side of the fan is increased, the air pressure value of the air outlet side of the corresponding fan is reduced (positive pressure), when the air inlet side of the fan is completely blocked, the vacuum degree of the air inlet side of the fan reaches a peak value, and the air pressure value reaches a peak value. Therefore, in the embodiment of the invention, if the wind pressure value detected by the wind pressure sensor is within the first wind pressure value range, the blockage is considered to be not generated; if the wind pressure value detected by the wind pressure sensor is larger than the maximum value of the first wind pressure value range, the air inlet side of the fan is considered to be blocked; and if the wind pressure value detected by the wind pressure sensor is smaller than the minimum value of the first wind pressure value range, the air outlet side of the fan is considered to be blocked, and therefore the specific position where the blockage occurs is determined.
When the maintenance, can fix a position the fault location fast, for example, the air cleaner of the admit air side of fan to check, maintain this air cleaner, avoid checking the problem that leads to work load big to whole runners, reduce the work load when maintaining, reduced cost of maintenance.
The control method of the gas water heater provided by the embodiment of the invention comprises the steps of determining the operation stage of the gas water heater, determining the first wind pressure value range in which the gas water heater is not blocked in the operation stage, acquiring the wind pressure value acquired by the wind pressure sensor in the operation stage, and determining the position of the gas water heater where the gas water heater is blocked based on the wind pressure value and the first wind pressure value range. The gas water heater can be determined according to the wind pressure value of the air inlet side of the fan of the gas water heater to be located at the specific position of blockage, so that the fault position can be rapidly located, parts at the position can be checked and maintained, the problem that the workload is large due to the fact that all runners are checked is avoided, the workload during maintenance is reduced, and the maintenance cost is reduced.
In some embodiments of the present invention, the first wind pressure range is related to the rotation speed of the fan, and the mapping relationship between the first wind pressure range and the rotation speed of the fan may be established through a plurality of experiments in advance. In the application process, the current rotating speed of the fan can be detected, and the first wind pressure value range corresponding to the current rotating speed is determined according to the mapping relation between the first wind pressure value range and the rotating speed of the fan.
For example, in the embodiment of the present invention, the fan in the front sweeping stage is operated at a predetermined rotation speed, so that the first wind pressure range corresponding to the front sweeping stage is fixed, and the first wind pressure range corresponding to the front sweeping stage is set to [ C1, C2 ]. Therefore, after the current operation stage is determined to be the previous purging stage, the first wind pressure value range [ C1, C2] in which the gas-fired water heater is not blocked in the previous purging stage can be determined.
In the embodiment of the invention, in the normal operation stage after the gas valve of the gas water heater is started, because the combustion load is dynamically changed, in order to meet the dynamically changed combustion load, the gas is fully combusted, and the temperature of hot water is accurately controlled, therefore, the amount of air sent into a combustor of the gas water heater by a fan needs to be dynamically changed, which requires that the rotating speed of the fan is dynamically changed, therefore, in the embodiment of the invention, the variable frequency fan is adopted, the variable frequency fan adopts a variable frequency speed control device, and the air volume of the fan is changed by changing the rotating speed of the fan. The rotating speed of the fan is dynamically changed, so the first wind pressure value range of the gas water heater without blockage in the normal operation stage is also changed. Therefore, in the embodiment of the present invention, after the current operation stage is determined to be the normal operation stage, the rotation speed of the fan in the normal operation stage is obtained, and then the first wind pressure value range [ a1, a2] corresponding to the current rotation speed is determined according to the mapping relationship between the first wind pressure value range and the rotation speed of the fan.
In some embodiments of the present invention, theoretically, each rotation speed corresponds to a rated wind pressure value, and if the wind pressure value at the rotation speed is the rated wind pressure value, the pipe is considered to be not blocked. However, it is considered that the variable frequency fan cannot achieve true stepless frequency conversion, that is, the change of the rotating speed of the fan cannot be stepless change, but is step-type. Therefore, in the embodiment of the invention, the mapping relation between the rotating speed and the rated wind pressure value can be established in advance to form the mapping table. In the application process, the current rotating speed of the fan can be detected, and the rated wind pressure value corresponding to the current rotating speed can be searched from the mapping table of the rotating speed and the rated wind pressure value. And then, determining a wind pressure value within a preset range by taking the rated wind pressure value as a center, and taking the wind pressure value as a first wind pressure value range in which the gas water heater is not blocked. For example, the mapping table of the rotation speed, the rated wind pressure value and the first wind pressure value range is shown as the following table:
| speed (r/mim) | 1000 | 2000 | 3000 | 4000 | 5000 |
| Rated wind pressure value (pa) | 100 | 150 | 200 | 250 | 300 |
| First wind pressure value Range (pa) | 90-100 | 140-160 | 190-210 | 240-260 | 290-310 |
In some embodiments of the present invention, after determining the first wind pressure range value when the operation phase is the normal operation phase, the method further includes the following steps:
1. a second wind pressure value range [ B1, B2] including the first wind pressure value range [ A1, A2] is determined.
In the embodiment of the invention, the first wind pressure value range [ A1, A2] belongs to the subset of the second wind pressure value range [ B1, B2 ]. Illustratively, B1 < A1, B2 > A2. The second wind pressure value range [ B1, B2] can be obtained according to a plurality of experiments, and the embodiment of the invention is not described herein again. Extreme values B1 and B2 of the second wind pressure value range indicate the limit value of the wind pressure value of the air inlet side which can normally operate when the gas water heater is blocked, and when the wind pressure value of the air inlet side is not in the second wind pressure value range [ B1, B2], the gas water heater needs to be controlled to stop operating.
2. And if the wind pressure value is larger than the maximum value of the second wind pressure value range [ B1, B2], determining that the air inlet side of the fan is blocked, judging that the blocking degree is serious, and controlling the gas water heater to stop running.
As described above, when the air inlet side of the fan is blocked, the air flow of the whole pipeline is also reduced, and according to the characteristics of the fan, the air pressure value of the air inlet side of the fan is increased, and the more serious the blockage, the larger the air pressure value of the air inlet side is. Therefore, if the wind pressure value is larger than the maximum value B2 of the second wind pressure value range [ B1, B2], the blockage on the air inlet side of the fan is indicated, the serious blockage degree is judged, and the gas water heater is controlled to stop running.
3. And if the wind pressure value is smaller than the minimum value of the second wind pressure value range [ B1, B2], determining that the air outlet side of the fan is blocked, judging that the blocking degree is serious, and controlling the gas water heater to stop running.
As described above, when the air outlet side of the fan is blocked, the air flow of the whole pipeline is reduced, and according to the characteristics of the fan, the air pressure value of the air inlet side of the fan is reduced, and the more serious the blockage is, the smaller the air pressure value of the air inlet side is. Therefore, if the wind pressure value is smaller than the minimum value B1 of the second wind pressure value range [ B1, B2], the blockage on the air outlet side of the fan is determined, the serious blockage degree is judged, and the gas water heater is controlled to stop running.
In some embodiments of the present invention, when the operation phase is a normal operation phase, when the wind pressure value is greater than the maximum value a2 of the first wind pressure value range [ a1, a2], it is further determined whether the wind pressure value is less than or equal to the maximum value B2 of the second wind pressure value range [ B1, B2], and if the wind pressure value is less than or equal to the maximum value B2 of the second wind pressure value range [ B1, B2], it is determined that the air intake side of the fan is blocked, and it is determined that the degree of blocking of the air intake side is slight, an early warning prompt is issued, and the normal operation of the gas water heater is maintained, and a time is reserved for a user to handle the blocking.
In some embodiments of the invention, when the operation stage is a normal operation stage, when the wind pressure value is less than the minimum value a1 of the first wind pressure value range [ a1, a2], whether the wind pressure value is greater than or equal to the minimum value B1 of the second wind pressure value range [ B1, B2] is further determined, if the wind pressure value is greater than or equal to the minimum value B1 of the second wind pressure value range [ B1, B2], it is determined that the air outlet side of the fan is blocked, the degree of blocking on the air outlet side is determined to be slight, an early warning prompt is given, the gas water heater is kept operating normally, and a reserved time for the user to process the blockage is provided.
The control logic of the gas water heater control method according to the embodiment of the present invention will be described in detail with reference to a specific embodiment.
Fig. 1B is a logic diagram of a control method of a gas water heater according to an embodiment of the present invention, as shown in fig. 1B, when starting, a fan is started, and the gas water heater enters a front cleaning stage. When entering the front cleaning stage, acquiring a wind pressure value P1 on the air inlet side of the fan, and judging whether the wind pressure value P1 is in a first wind pressure value range [ C1, C2] corresponding to the front cleaning stage. If the wind pressure value P1 is in the first wind pressure value range [ C1, C2], controlling the gas valve and the ignition device to start; if the wind pressure value P1 is not within the first wind pressure value range [ C1, C2], determining whether the duration of the pre-cleaning phase reaches a preset duration T1, that is, determining whether the pre-cleaning phase is finished. If the time length of the previous cleaning stage does not reach T1, returning to judge whether the wind pressure value P1 is within the first wind pressure value range [ C1, C2] corresponding to the previous cleaning stage; if the time length T of the previous cleaning stage is T1, it is further determined whether the wind pressure value P1 is greater than the maximum value C2 of the first wind pressure value range. If the wind pressure value P1 is larger than C2, the air inlet side of the fan is judged to be blocked, the gas water heater is controlled to stop working, and the process is ended; and if the wind pressure value P1 is smaller than the minimum value C1 of the first wind pressure value range, judging that the air outlet side of the fan is blocked, controlling the gas water heater to stop working, and ending the process.
In the process, after the wind pressure value P1 is in the first wind pressure value range [ C1, C2] and the gas valve and the ignition device are controlled to be started, whether a flame feedback signal fed back by the flame detection device is received or not is judged. Illustratively, the flame detection device is a flame feedback needle, and a signal is generated and transmitted to the controller when the flame feedback needle contacts the flame. And the controller confirms that the ignition combustion is successfully started to enter a normal working state after receiving the signal. Once the flame leaves the flame feedback needle, the feedback signal interrupts the machine to automatically shut down, and the function is the accidental flameout protection function of the water heater. And if the flame feedback signal is received, indicating that the ignition is successful, entering a normal operation stage. If the flame feedback signal is not received, indicating that the ignition fails, closing the gas valve, then starting the back cleaning program, and accumulating the closing times of the gas valve. After the post-scavenging process is finished, judging whether the closing frequency of the gas valve is greater than a first threshold value K1, if the closing frequency of the gas valve is not greater than a first threshold value K1, restarting the pre-scavenging process, and executing the steps after the pre-scavenging process to try to re-ignite; and if the closing times of the gas valve is greater than a first threshold value K1, judging that the ignition fails, controlling the gas water heater to stop working, and ending the process.
In the process, after the flame feedback signal is received and a normal operation stage is entered, the current rotating speed of the fan and the wind pressure value P2 of the air inlet side of the fan are obtained, and the corresponding first wind pressure value range [ A1, A2] and the corresponding second wind pressure value range [ B1, B2] are determined according to the current rotating speed of the fan. Then, whether the wind pressure value P2 is in the second wind pressure value range [ B1, B2] is judged, and if the wind pressure value P2 is in the second wind pressure value range [ B1, B2], whether the wind pressure value P2 is in the first wind pressure value range [ A1, A2] is further judged; and if the wind pressure value P2 is not in the second wind pressure value range [ B1, B2], controlling the gas valve to be closed, starting the post-cleaning program, and accumulating the closing times of the gas valve. After the post-cleaning program is executed, judging whether the closing frequency of the gas valve is greater than a second threshold value K2, if the closing frequency of the gas valve is not greater than the second threshold value K2, restarting the pre-cleaning program, executing the steps after the pre-cleaning program, trying to re-ignite, trying to remove blockage in the flow channel through the post-cleaning and the pre-cleaning, and re-igniting, so that self-cleaning of the pipeline is realized, the problem of maintenance cost increase caused by frequent maintenance is avoided, the maintenance cost is reduced, and the use experience of a user is improved; if the closing times of the gas valve is larger than a second threshold value K2, judging that the fan has an out-of-tolerance wind pressure fault and the flow channel is seriously blocked, controlling the gas water heater to stop running immediately, and ending the process.
In the process, if the wind pressure value P2 is in the first wind pressure value range [ A1, A2], the flow channel is not blocked, the gas water heater normally operates, a new wind pressure value P2 is obtained, and then the step of judging whether the wind pressure value P2 is in the second wind pressure value range [ B1, B2] is returned; if the wind pressure value P2 is not in the first wind pressure value range [ A1, A2], further judging whether the wind pressure value P2 is larger than the maximum value A2 of the first wind pressure value range [ A1, A2], if the wind pressure value P2 is larger than the maximum value A2 of the first wind pressure value range [ A1, A2], judging that the air inlet side of the fan is blocked, giving an alarm prompt, but the gas water heater can still normally operate at the moment, acquiring a new wind pressure value P2, and returning to execute the step of judging whether the wind pressure value P2 is in the second wind pressure value range [ B1, B2 ]; and if the wind pressure value P2 is smaller than the minimum value A1 of the first wind pressure value range [ A1, A2], judging that the air outlet side of the fan is blocked, giving an alarm prompt, but the gas water heater can still normally operate at the moment, acquiring a new wind pressure value P2, and returning to execute the step of judging whether the wind pressure value P2 is in the second wind pressure value range [ B1, B2 ].
Example two
An embodiment of the present invention provides a control device for a gas water heater, a wind pressure sensor is disposed on an air inlet side of a fan of the gas water heater, fig. 2 is a schematic structural diagram of the control device for the gas water heater provided by the embodiment of the present invention, and as shown in fig. 2, the control device includes:
an operation stage determining module 201, configured to determine an operation stage of the gas water heater;
the first wind pressure value range determining module 202 is used for determining a first wind pressure value range in which the gas water heater is not blocked in the operation stage;
a wind pressure value obtaining module 203, configured to obtain a wind pressure value acquired by the wind pressure sensor in the operation phase;
and a blockage position determining module 204, configured to determine a position where the gas water heater is blocked based on the wind pressure value and the first wind pressure value range.
In some embodiments of the invention, the occlusion location determination module 204 is configured to:
when the wind pressure value is larger than the maximum value of the first wind pressure value range, determining that the air inlet side of the fan is blocked;
and when the wind pressure value is smaller than the minimum value of the first wind pressure value range, determining that the air outlet side of the fan is blocked.
In some embodiments of the present invention, the operation stage includes a pre-sweep stage, and the determining a first range of wind pressure values in which the gas-fired water heater is not blocked in the operation stage includes:
and determining a first wind pressure value range in which the gas-fired water heater is not blocked in the pre-sweeping stage.
In some embodiments of the present invention, the operation phases include a normal operation phase, and the first wind pressure value range determining module 202 includes:
the rotating speed acquisition submodule is used for acquiring the rotating speed of the fan in a normal operation stage;
and the first wind pressure value range determining submodule is used for determining a first wind pressure value range in which the gas water heater is not blocked based on the rotating speed of the fan.
In some embodiments of the present invention, the first wind pressure value range determination submodule includes:
the rated wind pressure value searching unit is used for searching a rated wind pressure value corresponding to the rotating speed from a mapping table of the rotating speed and the rated wind pressure value;
and the first wind pressure value range determining unit is used for determining a wind pressure value within a preset range by taking the rated wind pressure value as a center to be used as a first wind pressure value range in which the gas water heater is not blocked.
In some embodiments of the present invention, when the operation phase is a normal operation phase, the apparatus further includes:
the second wind pressure value range determining module is used for determining a second wind pressure value range comprising the first wind pressure value range after determining the first wind pressure range value;
a determination module to:
if the wind pressure value is larger than the maximum value of the second wind pressure value range, determining that the air inlet side of the fan is blocked, judging the blocking degree to be serious, and controlling the gas water heater to stop running;
and if the wind pressure value is smaller than the minimum value of the second wind pressure value range, determining that the air outlet side of the fan is blocked, judging the blocking degree to be serious, and controlling the gas water heater to stop running.
In some embodiments of the present invention, when the operation phase is a normal operation phase, the blockage location determination module 204 is further configured to:
if the wind pressure value is smaller than or equal to the maximum value of the second wind pressure value range and larger than the maximum value of the first wind pressure value range, determining that the air inlet side of the fan is blocked, judging that the blocking degree of the air inlet side is slight, and sending out an early warning prompt and keeping the normal operation of the gas water heater.
In some embodiments of the present invention, when the operation phase is a normal operation phase, the blockage location determination module 204 is further configured to:
if the wind pressure value is larger than or equal to the minimum value of the second wind pressure value range and smaller than the minimum value of the first wind pressure value range, determining that the air outlet side of the fan is blocked, judging that the blocking degree of the air outlet side is slight, and sending out an early warning prompt and keeping the normal operation of the gas water heater.
The gas water heater control device can execute the gas water heater control method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the gas water heater control method.
EXAMPLE III
Fig. 3A is a schematic structural diagram of a gas water heater according to an embodiment of the present invention, and as shown in fig. 3A, the gas water heater is a forced-induction gas water heater, and includes a controller 10, a fan 20, a gas valve 30, and an air pressure sensor 40. Wherein, the wind pressure sensor 40 is arranged at the air inlet side of the fan 20, and the controller is respectively electrically connected with the fan 20 and the wind pressure sensor 40. Illustratively, in the embodiment of the present invention, the gas-fired water heater may further include an alarm device 50, and the alarm device 50 is electrically connected to the controller 10. The alarm device 50 may issue a prompt message for prompting the location of the blockage of the gas water heater in response to an alarm prompt instruction issued by the controller 110. For example, the alarm device 50 may emit a prompt message in the form of a sound, a light, or a display screen, and the embodiment of the present invention is not limited herein. Illustratively, in the embodiment of the present invention, the alarm device 50 may be a display screen.
Illustratively, as shown in fig. 3A, the gas-fired water heater further includes a flame feedback pin 60, a burner 70, a heat exchanger 80, an air filter 90, and an ignition device 100. Wherein the air inlet of the fan 20 is connected to the air filter 90 via a premixer 111. The gas inlet of the gas valve 30 is connected to a gas pipeline, the gas outlet is connected to the premixer 111, and the gas and the air are premixed in the premixer 111. The wind pressure sensor 40 is connected to a pipe between the gas valve 30 and the premixer 111. The duct connected to the air outlet of the blower 20 extends into the burner 70, and the mixed gas of gas and air is burned in the burner 70. Heat generated by the combustion is transferred to water in the heat exchanger 80, thereby generating hot water. The ignition device 100 may ignite in a pulse ignition manner under the control of the controller 10, and the flame feedback needle 60 feeds a flame feedback signal back to the controller 10 when contacting a flame. The structure of the gas water heater is an exemplary description of the present invention, and the present invention does not limit the structure of the gas water heater.
Fig. 3B is a schematic structural diagram of a controller according to an embodiment of the present invention. The controller 10 is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The controller 10 may also represent various forms of mobile devices, such as personal digital assistants, cellular telephones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 3B, the controller 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM)12, a Random Access Memory (RAM)13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM)12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the controller 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
A number of components in the controller 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the controller 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. The processor 11 performs the various methods and processes described above, such as the gas-fired water heater control method.
In some embodiments, the gas-fired water heater control method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed on the controller 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the gas-fired hot water boiler control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the gas-fired water heater control method by any other suitable means (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
Computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described herein may be implemented on a controller 10, the controller 10 having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user may provide input to the controller 10. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), Wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above, reordering, adding or deleting steps, may be used. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A control method of a gas water heater is characterized in that a wind pressure sensor is arranged on the air inlet side of a fan of the gas water heater, and the method comprises the following steps:
determining the operation stage of the gas water heater;
determining a first wind pressure value range in which the gas water heater is not blocked in the operation stage;
acquiring a wind pressure value acquired by the wind pressure sensor in the operation stage;
and determining the position of the blockage of the gas water heater based on the wind pressure value and the first wind pressure value range.
2. The gas water heater control method according to claim 1, wherein determining a position where a fan of the gas water heater is blocked based on the wind pressure value and the first wind pressure value range comprises:
when the wind pressure value is larger than the maximum value of the first wind pressure value range, determining that the air inlet side of the fan is blocked;
and when the wind pressure value is smaller than the minimum value of the first wind pressure value range, determining that the air outlet side of the fan is blocked.
3. The gas-fired water heater control method according to claim 2, wherein the operation phase includes a pre-purge phase, and the determining of the first range of wind pressure values in which the gas-fired water heater is not blocked in the operation phase includes:
and determining a first wind pressure value range in which the gas-fired water heater is not blocked in the pre-sweeping stage.
4. The gas-fired water heater control method according to claim 2, wherein the operation stage includes a normal operation stage, determining a first range of wind pressure values in which the gas-fired water heater is not blocked in the operation stage includes:
acquiring the rotating speed of the fan in a normal operation stage;
and determining a first wind pressure value range of the gas water heater without blockage based on the rotating speed of the fan.
5. The gas water heater control method according to claim 4, wherein determining a first range of wind pressure values in which the gas water heater is not blocked based on the rotation speed of the fan comprises:
searching a rated wind pressure value corresponding to the rotating speed from a mapping table of the rotating speed and the rated wind pressure value;
and determining a wind pressure value within a preset range by taking the rated wind pressure value as a center, and taking the wind pressure value as a first wind pressure value range in which the gas water heater is not blocked.
6. The method for controlling a gas-fired water heater according to claim 4, wherein after determining the first wind pressure range value when the operation stage is a normal operation stage, the method further comprises:
determining a second wind pressure value range comprising the first wind pressure value range;
if the wind pressure value is larger than the maximum value of the second wind pressure value range, determining that the air inlet side of the fan is blocked, judging the blocking degree to be serious, and controlling the gas water heater to stop running;
and if the wind pressure value is smaller than the minimum value of the second wind pressure value range, determining that the air outlet side of the fan is blocked, judging the blocking degree to be serious, and controlling the gas water heater to stop running.
7. The method for controlling a gas-fired water heater according to claim 6, wherein when the operation phase is a normal operation phase and the wind pressure value is greater than the maximum value of the first wind pressure value range, it is determined that the air inlet side of the fan is blocked, and the method comprises:
if the wind pressure value is smaller than or equal to the maximum value of the second wind pressure value range and larger than the maximum value of the first wind pressure value range, the blockage of the air inlet side of the fan is determined, the blockage degree of the air inlet side is judged to be slight, and an early warning prompt is sent out to keep the normal operation of the gas water heater.
8. The method for controlling a gas-fired water heater according to claim 6, wherein when the operation phase is a normal operation phase and the wind pressure value is smaller than the minimum value of the first wind pressure value range, it is determined that the air outlet side of the fan is blocked, and the method comprises:
if the wind pressure value is larger than or equal to the minimum value of the second wind pressure value range and smaller than the minimum value of the first wind pressure value range, determining that the air outlet side of the fan is blocked, judging that the blocking degree of the air outlet side is slight, and sending out an early warning prompt and keeping the normal operation of the gas water heater.
9. The gas water heater is characterized by comprising a controller, a fan and a wind pressure sensor, wherein the wind pressure sensor is arranged on the air inlet side of the fan, and the controller is electrically connected with the fan and the wind pressure sensor respectively;
the controller includes:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the gas-fired water heater control method of any one of claims 1-8.
10. The gas-fired water heater of claim 9, further comprising an alarm device electrically connected to the controller.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116026043A (en) * | 2022-12-30 | 2023-04-28 | 广东万和热能科技有限公司 | Wind pressure switch control method and device for gas heating water heater |
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| JPS60185051A (en) * | 1984-02-29 | 1985-09-20 | Matsushita Electric Ind Co Ltd | Instantaneous water heater |
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| CN111121299A (en) * | 2018-10-30 | 2020-05-08 | 宁波方太厨具有限公司 | Fan control method of gas water heater and up-drawing dual-purpose furnace applying same |
| US20200271312A1 (en) * | 2019-02-21 | 2020-08-27 | Anthony LITKA | Boiler combustor side blockage detection system and method |
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2022
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| JPS60185051A (en) * | 1984-02-29 | 1985-09-20 | Matsushita Electric Ind Co Ltd | Instantaneous water heater |
| US6401708B1 (en) * | 1999-02-26 | 2002-06-11 | Lg Electronics Inc. | Pressure sensing device in gas furnace and method for controlling operation thereof |
| KR20070033689A (en) * | 2005-09-22 | 2007-03-27 | 주식회사 경동나비엔 | How to cut off safety when burning boiler |
| CN104110890A (en) * | 2014-06-30 | 2014-10-22 | 广东万家乐燃气具有限公司 | Pipeline blockage detection device and method |
| CN111121299A (en) * | 2018-10-30 | 2020-05-08 | 宁波方太厨具有限公司 | Fan control method of gas water heater and up-drawing dual-purpose furnace applying same |
| US20200271312A1 (en) * | 2019-02-21 | 2020-08-27 | Anthony LITKA | Boiler combustor side blockage detection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116026043A (en) * | 2022-12-30 | 2023-04-28 | 广东万和热能科技有限公司 | Wind pressure switch control method and device for gas heating water heater |
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| CN114963569B (en) | 2024-04-09 |
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