CN107014088B - Ignition protection method and system for gas water heater - Google Patents
Ignition protection method and system for gas water heater Download PDFInfo
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- CN107014088B CN107014088B CN201710239957.5A CN201710239957A CN107014088B CN 107014088 B CN107014088 B CN 107014088B CN 201710239957 A CN201710239957 A CN 201710239957A CN 107014088 B CN107014088 B CN 107014088B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The invention provides an ignition protection method and system of a gas water heater, comprising the following steps: starting an ignition program; judging whether two conditions of the ignition frequency being greater than a first preset value and the ignition time being less than a second preset value are satisfied at the same time; if so, closing the ignition program, judging whether the wind pressure switch has a fault, if so, sending a fault alarm, otherwise, restarting the ignition program after preset time; if not, restarting the ignition program after the preset time. If the two conditions are simultaneously satisfied, the gas water heater is possibly in a state of frequent ignition and flameout, at the moment, whether the wind pressure switch has a fault or not needs to be judged, and if the wind pressure switch has the fault, a fault alarm is sent out so that maintenance personnel can detect and maintain the wind pressure switch and the fan conveniently; if no fault exists or the two conditions cannot be simultaneously met, which indicates that the gas water heater does not enter the state of frequent ignition and flameout, the ignition program can be restarted after the preset time.
Description
Technical Field
The invention relates to the technical field of gas water heaters, in particular to an ignition protection method and system of a gas water heater.
Background
The gas water heater is one of hot water boilers, and uses gas as fuel to heat water through a burner, so as to realize heating and provide domestic hot water. The existing gas water heater unit comprises an air supply system, an ignition system, a monitoring system, a fuel system, an electric control system and the like. The main components of the air supply system are a shell, a fan, an air pressure switch and the like, wherein the fan is used for discharging waste gas generated by combustion to enable the combustion chamber to generate negative pressure so as to enable fresh air to be supplemented into the combustion chamber, and the air pressure switch is used for detecting whether the fan normally operates or not; the main function of the ignition system is to ignite a mixture of air and fuel; the monitoring system has the main functions of ensuring the safe and stable operation of the burner; the main function of the fuel system is to ensure that the burner burns the required fuel; the electric control system is a command center and a contact center of the above systems, and the main control element is a program controller.
In the working process of the gas water heater, when the fan is started, if the wind pressure switch is closed, the fan is judged to be effectively started, and if the wind pressure switch cannot be closed, the wind pressure switch is judged to be in fault or the fan cannot normally run; when the fan is closed, if the wind pressure switch is disconnected, the wind pressure switch is judged to be normal, if the wind pressure switch cannot be disconnected, the wind pressure switch is judged to have a fault, and therefore the condition that air can be effectively replaced in the operation process of the gas water heater unit is ensured, and the reliability of combustion is ensured. However, after the fan is started and the wind pressure switch is normally closed, if the fan and the wind pressure switch are failed at the same time, it cannot be determined whether the gas water heater unit is failed, at this time, the gas water heater enters a state of frequent flameout and ignition, and finally deflagration may be caused.
Disclosure of Invention
In view of this, the invention provides an ignition protection method and system for a gas water heater, so as to avoid frequent flameout and ignition caused by simultaneous failure of a wind pressure switch and a fan of the gas water heater, and further avoid deflagration of the gas water heater.
In order to achieve the purpose, the invention provides the following technical scheme:
an ignition protection method of a gas water heater, wherein the gas water heater comprises a fan and a wind pressure switch, and comprises the following steps:
starting an ignition program;
judging whether two conditions of the ignition frequency being greater than a first preset value and the ignition time being less than a second preset value are satisfied at the same time;
if so, closing the ignition program, judging whether the wind pressure switch has a fault, if so, sending a fault alarm, otherwise, restarting the ignition program after preset time;
if not, restarting the ignition program after preset time.
Preferably, the judging whether the wind pressure switch has a fault includes:
turning off the fan;
judging whether the wind pressure switch is disconnected or not;
if not, sending out a fault alarm;
and if so, restarting the fan and the ignition program after the preset time.
Preferably, before starting the ignition program, the method further comprises:
starting the fan;
judging whether the wind pressure switch is closed or not;
if not, sending out a fault alarm;
if yes, starting the ignition program.
Preferably, after restarting the ignition process after the preset time, the method further comprises:
judging whether the ignition time is greater than or equal to the second preset value;
if so, resetting the ignition times and the ignition time;
and if not, adding 1 to the ignition frequency.
Preferably, when the gas-fired water heater is initially powered on, the method further comprises the following steps:
and clearing the ignition times and the ignition time.
An ignition protection system of a gas water heater, wherein the gas water heater comprises a fan and a wind pressure switch, and comprises an ignition control module, a first judgment module, a second judgment module and an alarm module;
the ignition control module is used for closing an ignition program according to a first instruction and starting the ignition program according to a second instruction;
the first judgment module is used for judging whether two conditions of ignition times larger than a first preset value and ignition time smaller than a second preset value are simultaneously satisfied, if so, sending the first instruction to the ignition control module and the second judgment module, and if not, sending the second instruction to the ignition control module after preset time;
the second judging module is used for judging whether the wind pressure switch has faults according to the first instruction, if so, the second judging module controls the alarm module to send out fault alarm, otherwise, after the preset time, the second instruction is sent to the ignition control module.
Preferably, the second judging module comprises a fan control unit and a wind pressure switch judging unit;
the fan control unit is used for closing the fan according to the first instruction and starting the fan according to the second instruction;
the wind pressure switch judging unit is used for judging whether the wind pressure switch is disconnected or closed, if not, the alarm module is controlled to send out a fault alarm, and if so, the second instruction is sent to the ignition control module and the fan control unit after preset time.
Preferably, the device further comprises a counting module;
the counting module is used for recording the ignition times and the ignition time.
Preferably, the counting module is further configured to zero the ignition frequency and the ignition time when the gas water heater is powered on for the first time.
Preferably, the system further comprises a third judging module;
the third judging module is used for judging whether the ignition time is greater than or equal to the second preset value, if so, the calculating module is controlled to clear the ignition frequency and the ignition time, and if not, the calculating module is controlled to add 1 to the ignition frequency.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
according to the ignition protection method and the ignition protection system for the gas water heater, after an ignition program is started, whether two conditions of the ignition frequency being larger than a first preset value and the ignition time being smaller than a second preset value are simultaneously established or not is judged, if the two conditions are simultaneously established, the gas water heater possibly enters a state of frequent ignition and flameout, at the moment, the ignition program needs to be closed, whether a wind pressure switch is in fault or not is judged, if the wind pressure switch is in fault, the wind pressure switch and a fan possibly simultaneously break down is judged, at the moment, a fault alarm needs to be sent out, so that maintenance personnel can stop to detect and maintain the wind pressure switch and the fan; if the wind pressure switch is not in fault, namely the wind pressure switch and the fan are not in fault at the same time, the phenomena of frequent ignition and flameout caused by the fault of the wind pressure switch and the fan at the same time can be avoided, the possibility of detonation is eliminated, and the ignition program can be restarted after the preset time. In addition, if the two conditions cannot be met at the same time, the gas water heater does not enter a state of frequent ignition and flameout, so that the ignition program can be restarted after the preset time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of an ignition protection method for a gas water heater according to an embodiment of the present invention;
FIG. 2 is a flow chart of another ignition protection method for a gas-fired water heater according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for protecting ignition of a gas water heater according to an embodiment of the present invention, wherein the method includes determining whether a wind pressure switch has failed;
fig. 4 is a schematic structural diagram of an ignition protection system of a gas water heater according to an embodiment of the present invention.
Detailed Description
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.
The embodiment of the invention provides an ignition protection method of a gas water heater. Wherein, air supply system includes fan and wind pressure switch etc. and the effect of fan is that the waste gas that the exhaust combustion produced makes the combustion chamber produce the negative pressure, and then makes in the fresh air can supply the combustion chamber, and whether wind pressure switch's effect detects the fan normal operating.
The ignition protection method provided by the embodiment of the invention, as shown in fig. 1, comprises the following steps:
s101: starting an ignition program;
s102: judging whether two conditions of the ignition frequency being greater than a first preset value and the ignition time being less than a second preset value are simultaneously satisfied, if so, entering S103, and if not, entering S105;
s103: closing the ignition program, judging whether the wind pressure switch has a fault, if so, entering S104, otherwise, entering S105;
s104: sending out a fault alarm;
s105: restarting the ignition process after a preset time.
After the gas water heater is started, an ignition program needs to be started for ignition so as to ignite the gas in the combustion chamber to heat the water. In the running process of the ignition program, if the ignition cannot be successfully performed, multiple times of ignition are needed, at the moment, a counting module in the ignition protection system can record the times of ignition and the ignition time, and then whether the two conditions that the ignition times are greater than a first preset value and the ignition time is less than a second preset value are met or not at the same time is only needed to be judged, so that whether the phenomenon that multiple times of ignition, namely frequent ignition and flameout, occur in the gas water heater can be judged.
That is, if the two conditions that the ignition frequency is greater than the first preset value and the ignition time is less than the second preset value are simultaneously satisfied, it is indicated that the gas water heater may enter a state of frequent ignition and flameout, at this time, the ignition program needs to be closed, and whether the wind pressure switch has a fault or not is judged, if the wind pressure switch has a fault, it is indicated that the wind pressure switch and the fan may have a fault at the same time, at this time, a fault alarm needs to be sent out, so that maintenance personnel can stop the gas water heater to detect and maintain the wind pressure switch and the fan; if the wind pressure switch is not in fault, namely the wind pressure switch and the fan are not in fault at the same time, the phenomena of frequent ignition and flameout caused by the fault of the wind pressure switch and the fan at the same time can be avoided, the possibility of detonation is eliminated, and the ignition program can be restarted after the preset time. In addition, if the two conditions cannot be met at the same time, the gas water heater does not enter a state of frequent ignition and flameout, so that the ignition program can be restarted after the preset time.
It should be noted that the first preset value, the second preset value and the preset time in the embodiment of the present invention are constants obtained according to practical experience or experiments, and the present invention does not limit specific data thereof.
In one embodiment of the present invention, before starting the ignition procedure, as shown in fig. 2, the method further includes:
s201: starting the fan;
s202: judging whether the wind pressure switch is closed, if so, entering S101, and if not, entering S104; s101 to S105 are the same as S101 to S105 in the above embodiments, and are not described herein again.
In practical application, before starting an ignition program, a fan needs to be started firstly, and whether the fan is started effectively or not is judged by closing the wind pressure switch, and fresh air is supplemented into a combustion chamber only under the condition that the wind pressure switch is closed, namely the fan is started effectively, so that the combustion condition required by gas can be met. In addition, before starting the fan, still need judge whether satisfy the ignition condition that the user set up, if satisfy, could start the fan, otherwise, can not start the fan. The ignition condition set by the user generally refers to the temperature set by the user, and the fan can be started only when the gas water heater normally operates and reaches the temperature set by the user.
However, even if the fan is effectively started before the ignition program is started, the wind pressure switch is normally closed, which does not indicate that the fan and the wind pressure switch are not in failure after the ignition program is started. And after the ignition program is started, if the fan and the wind pressure switch are failed simultaneously, whether the fan normally operates cannot be detected through the wind pressure switch, and based on the fact that the ignition frequency is judged after the ignition program is started, namely whether the ignition frequency in the preset ignition time is smaller than a first preset value is judged, whether the ignition frequency is larger than the preset value is judged, and therefore whether the phenomena of frequent ignition and flameout of the gas water heater are judged.
In this embodiment, as shown in fig. 3, the specific process of determining whether the wind pressure switch has a fault includes:
s301: turning off the fan;
s302: judging whether the wind pressure switch is disconnected or not, if not, entering S303, and if so, entering S304;
s303: sending out a fault alarm;
s304: and restarting the fan and the ignition program after the preset time.
Specifically, after judging that the two conditions of the ignition frequency being greater than the first preset value and the ignition time being less than the second preset value are simultaneously satisfied, the ignition program can be closed, and the fan is closed after a certain time, whether the wind pressure switch is normally disconnected is judged, if yes, the explanation wind pressure switch is faultless, thereby the condition that the two are faulted simultaneously is eliminated, and then the fan and the ignition program can be restarted after the preset time, the ignition is carried out again, if not, the explanation wind pressure switch or the fan fault is explained, thereby the fault alarm needs to be sent out, so that the maintenance personnel can be shut down, and the fault detection of the fan and the wind pressure switch is carried out.
Further, after restarting the ignition process after the preset time, the method further comprises the following steps: judging whether the ignition time is greater than or equal to the second preset value; if so, resetting the ignition times and the ignition time; and if not, adding 1 to the ignition frequency.
In addition, when the gas hot water stove is first powered on, still include: and clearing the ignition times and the ignition time. In addition, after the gas water heater provided by the embodiment of the invention is unexpectedly flamed out, the fan is not required to be turned off, and the step S101 is directly performed.
According to the ignition protection method for the gas water heater, after an ignition program is started, whether two conditions that the ignition frequency is greater than a first preset value and the ignition time is less than a second preset value are simultaneously established or not is judged, if the two conditions are simultaneously established, the gas water heater possibly enters a state of frequent ignition and flameout, at the moment, the ignition program needs to be closed, whether a wind pressure switch breaks down or not is judged, if the wind pressure switch breaks down, the wind pressure switch and a fan possibly break down simultaneously is judged, at the moment, a fault alarm needs to be sent out, and therefore maintenance personnel can stop to detect and maintain the wind pressure switch and the fan; if the wind pressure switch is not in fault, namely the wind pressure switch and the fan are not in fault at the same time, the phenomena of frequent ignition and flameout caused by the fault of the wind pressure switch and the fan at the same time can be avoided, the possibility of detonation is eliminated, and the ignition program can be restarted after the preset time. In addition, if the two conditions cannot be met at the same time, the gas water heater does not enter a state of frequent ignition and flameout, so that the ignition program can be restarted after the preset time.
The embodiment of the invention also provides an ignition protection system of the gas water heater, the gas water heater comprises a fan and a wind pressure switch, and as shown in fig. 4, the ignition protection system comprises an ignition control module 41, a first judgment module 42, a second judgment module 43 and an alarm module 44.
The ignition control module 41 is configured to close an ignition program according to a first instruction, and open the ignition program according to a second instruction;
the first judging module 42 is configured to judge whether two conditions, that is, the ignition frequency is greater than a first preset value and the ignition time is less than a second preset value, are satisfied at the same time, if yes, send the first instruction to the ignition control module 41 and the second judging module 43, and if not, send the second instruction to the ignition control module 41 after a preset time;
the second judging module 43 is configured to judge whether the wind pressure switch fails according to the first instruction, and if so, control the alarm module 44 to issue a failure alarm, otherwise, send the second instruction to the ignition control module 41 after a preset time.
Further, the second judging module 43 includes a fan control unit and a wind pressure switch judging unit; the fan control unit is used for closing the fan according to the first instruction and starting the fan according to the second instruction; the wind pressure switch judging unit is used for judging whether the wind pressure switch is disconnected or closed, if not, the alarm module is controlled to send out a fault alarm, and if so, the second instruction is sent to the ignition control module and the fan control unit after preset time.
Specifically, after the fan control unit controls the fan to be turned off, a third instruction is sent to the wind pressure switch judgment unit, and the wind pressure switch judgment unit judges whether the wind pressure switch is turned off according to the third instruction; after the fan control unit controls the fan to start, a fourth instruction is sent to the wind pressure switch judging unit, and the wind pressure switch judging unit judges whether the wind pressure switch is closed or not according to the fourth instruction.
The ignition protection system in this embodiment further comprises a counting module; the counting module is used for recording the ignition times and the ignition time. The counting module is also used for clearing the ignition times and the ignition time when the gas water heater is powered on for the first time.
In addition, the ignition protection system in the embodiment further comprises a third judgment module; the third judging module is used for judging whether the ignition time is greater than or equal to the second preset value, if so, the calculating module is controlled to clear the ignition frequency and the ignition time, and if not, the calculating module is controlled to add 1 to the ignition frequency.
According to the ignition protection system of the gas water heater provided by the embodiment of the invention, after the ignition control module starts an ignition program, the first judgment module judges whether two conditions of the ignition frequency being greater than a first preset value and the ignition time being less than a second preset value are simultaneously established, if the two conditions are simultaneously established, the gas water heater possibly enters a state of frequent ignition and flameout, at the moment, the ignition control module needs to be controlled to close the ignition program, the second judgment module is controlled to judge whether a wind pressure switch is in fault, if the wind pressure switch is in fault, the wind pressure switch and a fan possibly simultaneously fail, at the moment, the alarm module needs to send out a fault alarm, so that a maintenance worker stops to detect and maintain the wind pressure switch and the fan; if the wind pressure switch is not in fault, namely the wind pressure switch and the fan are not in fault at the same time, the phenomena of frequent ignition and flameout caused by the fault of the wind pressure switch and the fan at the same time can be avoided, the possibility of detonation is eliminated, and the ignition program can be restarted after the preset time. In addition, if the two conditions cannot be met at the same time, the gas water heater does not enter a state of frequent ignition and flameout, so that the ignition program can be restarted after the preset time.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An ignition protection method of a gas water heater, wherein the gas water heater comprises a fan and a wind pressure switch, and is characterized by comprising the following steps:
starting an ignition program;
judging whether two conditions of the ignition frequency being greater than a first preset value and the ignition time being less than a second preset value are satisfied at the same time;
if so, frequently igniting and extinguishing, closing the ignition program, judging whether the wind pressure switch has a fault, if so, sending a fault alarm, otherwise, restarting the ignition program after preset time;
if not, restarting the ignition program after preset time;
judge whether the wind pressure switch breaks down, include:
turning off the fan;
judging whether the wind pressure switch is disconnected or not;
if not, sending out a fault alarm;
and if so, restarting the fan and the ignition program after the preset time.
2. The method of claim 1, further comprising, prior to initiating an ignition sequence:
starting the fan;
judging whether the wind pressure switch is closed or not;
if not, sending out a fault alarm;
if yes, starting the ignition program.
3. The method of claim 1, after restarting the ignition process after a preset time, further comprising:
judging whether the ignition time is greater than or equal to the second preset value;
if so, resetting the ignition times and the ignition time;
and if not, adding 1 to the ignition frequency.
4. The method of claim 1, further comprising, upon initial power-up of the gas-fired water heater:
and clearing the ignition times and the ignition time.
5. An ignition protection method of a gas water heater, wherein the gas water heater comprises a fan and a wind pressure switch, and is characterized by comprising the following steps:
starting an ignition program;
judging whether two conditions of the ignition frequency being greater than a first preset value and the ignition time being less than a second preset value are satisfied at the same time;
if so, frequently igniting and extinguishing, closing the ignition program, judging whether the wind pressure switch has a fault, if so, sending a fault alarm, otherwise, restarting the ignition program after preset time;
if not, restarting the ignition program after preset time;
before starting the ignition program, the method further comprises the following steps:
starting the fan;
judging whether the wind pressure switch is closed or not;
if not, sending out a fault alarm;
if yes, starting the ignition program.
6. An ignition protection system of a gas water heater, wherein the gas water heater comprises a fan and a wind pressure switch, and is characterized by comprising an ignition control module, a first judgment module, a second judgment module and an alarm module;
the ignition control module is used for closing an ignition program according to a first instruction and starting the ignition program according to a second instruction;
the first judgment module is used for judging whether two conditions of ignition frequency being greater than a first preset value and ignition time being less than a second preset value are simultaneously established, if so, the phenomena of frequent ignition and flameout occur, and sending the first instruction to the ignition control module and the second judgment module, and if not, sending the second instruction to the ignition control module after preset time;
the second judging module is used for judging whether the wind pressure switch has a fault according to the first instruction, if so, controlling the alarm module to send out a fault alarm, otherwise, sending the second instruction to the ignition control module after preset time;
the second judging module comprises a fan control unit and a wind pressure switch judging unit;
the fan control unit is used for closing the fan according to the first instruction and starting the fan according to the second instruction;
the wind pressure switch judging unit is used for judging whether the wind pressure switch is disconnected or closed, if not, the alarm module is controlled to send out a fault alarm, and if so, the second instruction is sent to the ignition control module and the fan control unit after preset time.
7. The system of claim 6, further comprising a counting module;
the counting module is used for recording the ignition times and the ignition time.
8. The system of claim 7, wherein the counting module is further configured to clear the number of ignitions and the ignition time when the gas-fired hot water boiler is first powered up.
9. The system of claim 7, further comprising a third determining module;
the third judging module is used for judging whether the ignition time is greater than or equal to the second preset value, if so, the calculating module is controlled to clear the ignition frequency and the ignition time, and if not, the calculating module is controlled to add 1 to the ignition frequency.
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| CN111609460B (en) * | 2019-02-22 | 2023-10-24 | 博世热力技术（上海）有限公司 | Intelligent ignition control method and device for wall-mounted furnace |
| CN113514221B (en) * | 2020-04-10 | 2022-05-17 | 宁波方太厨具有限公司 | Automatic wind pressure resistance testing method for gas water heater |
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| CN102748866A (en) * | 2012-07-11 | 2012-10-24 | 中山市超人电器有限公司 | Control method of automatic constant temperature gas water heater with electric fan smoke emission |
| CN103759421A (en) * | 2014-01-20 | 2014-04-30 | 广东万和新电气股份有限公司 | Gas water heater with blockage protector and detection method thereof |
| KR101551258B1 (en) * | 2014-10-30 | 2015-09-10 | 린나이코리아 주식회사 | Safety combustion controlling method using gas pressure switch in boiler |
| CN205280633U (en) * | 2015-12-21 | 2016-06-01 | 刘理云 | Detect control system based on PLC fuel gas heat value |
| CN105605794A (en) * | 2016-02-22 | 2016-05-25 | 广东超人节能厨卫电器有限公司 | Sequential control method for rapidly starting forced-exhausting gas water heater |
| CN205619575U (en) * | 2016-04-26 | 2016-10-05 | 艾欧史密斯(中国)热水器有限公司 | Gas heater's some fire control temperature device |
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