CN110579022B - Gas water heater and anti-backfire control method thereof - Google Patents
Gas water heater and anti-backfire control method thereof Download PDFInfo
- Publication number
- CN110579022B CN110579022B CN201810583717.1A CN201810583717A CN110579022B CN 110579022 B CN110579022 B CN 110579022B CN 201810583717 A CN201810583717 A CN 201810583717A CN 110579022 B CN110579022 B CN 110579022B
- Authority
- CN
- China
- Prior art keywords
- temperature
- preset
- gas
- current
- equal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- 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)
- Control Of Combustion (AREA)
- Regulation And Control Of Combustion (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention discloses a gas water heater and an anti-backfire control method thereof, wherein the anti-backfire control method of the gas water heater comprises the following steps: acquiring the current temperature of the gas mixing and distributing chamber; judging whether the current temperature is greater than or equal to a first preset temperature or not; when the current temperature is greater than or equal to the first preset temperature, controlling a gas inlet valve to be closed; and when the current temperature is lower than the first preset temperature, the current temperature of the gas mixing and distributing chamber is obtained again. The invention can effectively prevent the gas mixing and distributing chamber from backfire, avoid the gas water heater from being damaged and ensure the safety of users.
Description
Technical Field
The invention relates to the technical field of combustion heat exchange, in particular to a gas water heater and an anti-backfire control method thereof.
Background
At present, in the working process of a gas water heater, air and gas fed into a gas mixing and distributing chamber are mixed and then supplied to a combustion chamber for combustion of a burner assembly in the combustion chamber, the radiant heat generated by combustion of the burner assembly heats the gas mixing and distributing chamber, the temperature of the gas mixing and distributing chamber is increased due to heat accumulation, and the higher the temperature is, the higher the tendency of backfire is. Although the prior art adopts flame stabilizing measures for preventing backfire by cooling the burner head and the like, the measures are easy to lose effectiveness due to the variability of the use environment and cannot effectively prevent the backfire, and once the backfire occurs, the gas water heater can be damaged and even the safety of a user can be endangered.
Disclosure of Invention
The invention mainly aims to provide a gas water heater and an anti-backfire control method thereof, and aims to solve the technical problem that the gas water heater in the prior art cannot effectively prevent backfire.
In order to achieve the purpose, the anti-backfire control method of the gas water heater provided by the invention comprises the following steps of:
acquiring the current temperature of the gas mixing and distributing chamber;
judging whether the current temperature is greater than or equal to a first preset temperature or not;
when the current temperature is greater than or equal to the first preset temperature, controlling a gas inlet valve to be closed;
and when the current temperature is lower than the first preset temperature, the current temperature of the gas mixing and distributing chamber is obtained again.
Preferably, the step of controlling the gas inlet valve to close when the current temperature is greater than or equal to the first preset temperature includes:
when the current temperature is greater than or equal to the first preset temperature, acquiring the current rotating speed of the fan;
judging whether the current rotating speed is greater than or equal to a first preset rotating speed or not;
when the current rotating speed is lower than the first preset rotating speed, controlling the fan to increase to the first preset rotating speed for operation;
and when the current rotating speed is greater than or equal to the first preset rotating speed, controlling the gas inlet valve to be closed.
Preferably, when the current rotating speed is less than the first preset rotating speed, the step of controlling the fan to increase to the first preset rotating speed for operation includes:
and when the current rotating speed is less than the first preset rotating speed, controlling the fan to be increased to the first preset rotating speed for operation and operating for a first preset time according to the first preset rotating speed.
Preferably, after the step of controlling the fan to increase to the first preset rotation speed and operate at the first preset rotation speed for a first preset time when the current rotation speed is less than the first preset rotation speed, the method further includes:
judging whether the current temperature is greater than or equal to a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;
when the current temperature is greater than or equal to the second preset temperature, controlling the gas inlet valve to be closed;
and when the current temperature is lower than the second preset temperature, the current temperature of the gas mixing and distributing chamber is obtained again.
Preferably, after the step of determining whether the current temperature is greater than or equal to a second preset temperature, the method further includes:
and when the current temperature is greater than or equal to the second preset temperature, controlling the fan to be increased from the first preset rotating speed to a second preset rotating speed for operation.
Preferably, the second preset rotating speed is the maximum rotating speed of the fan.
Preferably, after the step of determining whether the current temperature is greater than or equal to a first preset temperature, the method further includes:
and when the current temperature is greater than or equal to the first preset temperature, controlling the gas water heater to send alarm information.
Preferably, the alarm information includes at least one of an audible alarm and a flashing alarm.
Preferably, after the step of determining whether the current temperature is greater than or equal to a first preset temperature, the method further includes:
and when the current temperature is greater than or equal to the first preset temperature, controlling the gas water heater to display a fault code.
In addition, to achieve the above object, the present invention also provides a gas water heater including:
the combustion chamber is communicated with the upper part of the gas mixing and distributing chamber;
a burner assembly mounted within the combustion chamber;
the gas inlet pipeline is communicated with the lower part of the gas mixing and distributing chamber and is used for conveying gas into the gas mixing and distributing chamber, and a gas inlet valve is arranged on the gas inlet pipeline;
the fan is communicated with the lower part of the gas mixing and distributing chamber and is used for conveying combustion-supporting gas into the gas mixing and distributing chamber;
a temperature sensor for monitoring the temperature of the gas mixing and dispensing chamber;
an alarm device;
the temperature sensor, the gas inlet valve and the alarm device are all electrically connected with the controller;
wherein the controller comprises a storage unit, a processing unit and a computer program stored on the storage unit and operable on the processing unit, and the processing unit implements the steps of the anti-backfire control method of the gas water heater as described in any one of the above when executing the computer program.
In the working process of the gas water heater, when the risk of backfire possibly exists in the gas mixing and distributing chamber, the supply of gas is cut off in time, and the gas mixing and distributing chamber is cooled; when the risk of backfire does not exist in the gas mixing and distributing chamber, the current temperature of the gas mixing and distributing chamber is monitored in real time while the gas water heater works normally, the backfire phenomenon in the gas mixing and distributing chamber is effectively prevented, the gas water heater is prevented from being damaged, and the safety of a user is guaranteed.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a flowchart of a method of a first embodiment of a method of controlling flashback in a gas water heater of the present invention;
FIG. 2 is a flowchart of a method for controlling flashback in a gas water heater according to a second embodiment of the present invention;
FIG. 3 is a flowchart of a method for controlling flashback in a gas water heater according to a third embodiment of the present invention;
FIG. 4 is a flowchart of a method for controlling flashback in a gas water heater according to a fourth embodiment of the present invention;
FIG. 5 is a schematic perspective view of a gas water heater according to an embodiment of the present invention;
fig. 6 is a block diagram of a gas water heater according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
11 | |
| 2 | |
3 | |
| 31 | |
4 | |
| 5 | |
6 | |
| 100 | Controller | 10 | |
| 20 | Processing unit |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an anti-backfire control method of a gas water heater, and referring to fig. 1, in a first embodiment S100, the anti-backfire control method of the gas water heater comprises the following steps:
step S10, acquiring the current temperature of the gas mixing and distributing chamber;
in this embodiment, the gas mixing and distributing chamber is used for mixing the fuel gas and the combustion-supporting gas into a mixed gas, and providing the mixed gas to the combustion chamber for the combustion of the burner assembly in the combustion chamber. The combustion supporting gas in this embodiment is air. When the gas water heater works, air is conveyed to the gas mixing and distributing chamber through the fan, and gas is conveyed to the gas mixing and distributing chamber through the gas inlet pipe. During combustion of the burner assembly, the temperature of the gas mixture distribution chamber may increase. The current temperature can be the temperature of any one or more places of the gas mixing distribution chamber, the method for acquiring the temperature can be acquired by arranging the temperature sensor, the position for acquiring the temperature can be set according to actual needs, the acquired temperature can be processed in any mode, and the acquired current temperature can be used for being compared with the first preset temperature.
Step S20, judging whether the current temperature is larger than or equal to a first preset temperature;
in this embodiment, the temperature critical value of the gas mixing and distributing chamber at which the tempering occurs is the tempering temperature, and the first preset temperature is lower than the tempering temperature, for example, the temperature critical value of the gas mixing and distributing chamber is 150 ℃, and the first preset temperature value is set to be 140 ℃. And comparing the current temperature with the first preset temperature, and judging whether the current temperature is greater than or equal to the first preset temperature.
Step S30, when the current temperature is greater than or equal to the first preset temperature, controlling a gas inlet valve to close;
in this embodiment, a gas inlet valve is arranged on the gas inlet pipeline and used for controlling the on-off of the gas inlet pipeline. After the current temperature is compared with the first preset temperature, when the current temperature is judged to be greater than or equal to the first preset temperature, the risk that tempering possibly occurs in the gas mixing distribution chamber is indicated, the gas inlet valve is controlled to be closed, the gas inlet pipeline is blocked to convey gas after the gas inlet valve is closed, the combustor assembly stops burning after the supply of the gas is unavailable, the gas mixing distribution chamber is cooled, in addition, the fan normally supplies air to the gas mixing distribution chamber when the combustor assembly stops burning, the rapid cooling of the gas mixing distribution chamber is facilitated, and the tempering phenomenon in the gas mixing distribution chamber is effectively prevented.
And step S40, when the current temperature is lower than the first preset temperature, the current temperature of the gas mixing and distributing chamber is obtained again.
And after comparing the current temperature with the first preset temperature, judging that when the current temperature is lower than the first preset temperature, the current temperature is not in danger of backfire, and then the current temperature of the gas distribution chamber is obtained again, namely, the step S10 is returned, so that the current temperature of the gas distribution chamber is monitored in real time while the gas water heater works normally, and the backfire phenomenon in the gas distribution chamber is effectively prevented.
In the working process of the gas water heater, the current temperature of the gas mixing and distributing chamber is obtained; judging whether the current temperature is greater than or equal to a first preset temperature or not; when the current temperature is greater than or equal to the first preset temperature, controlling a gas inlet valve to be closed; and when the current temperature is lower than the first preset temperature, the current temperature of the gas mixing and distributing chamber is obtained again. Therefore, when the risk of backfire possibly exists in the gas mixing and distributing chamber, the supply of gas is cut off in time, and the gas mixing and distributing chamber is cooled; when the risk of backfire does not exist in the gas mixing and distributing chamber, the current temperature of the gas mixing and distributing chamber is monitored in real time while the gas water heater works normally, the backfire phenomenon in the gas mixing and distributing chamber is effectively prevented, the gas water heater is prevented from being damaged, and the safety of a user is guaranteed.
Further, referring to fig. 2, in a second embodiment S200 of the backfire preventing control method of the gas water heater according to the first embodiment of the invention based on the backfire preventing control method of the gas water heater according to the invention, the step S30 includes:
step S31, when the current temperature is larger than or equal to the first preset temperature, acquiring the current rotating speed of the fan;
in this embodiment, the current rotation speed of the fan may reflect the current air supply amount of the fan, the rotation speed of the fan may be classified into a level of an ultra-low rotation speed, a medium rotation speed, a high rotation speed, and an ultra-high rotation speed, and the higher the level is, the larger the current air supply amount of the fan is, where the ultra-high rotation speed is the maximum rotation speed of the fan. And when the current temperature is greater than or equal to the first preset temperature, acquiring the current rotating speed of the fan, namely acquiring the rotating speed of which level the fan operates at currently.
Step S32, judging whether the current rotating speed is larger than or equal to a first preset rotating speed;
first predetermined rotational speed can set up according to actual need, for example, the first predetermined rotational speed of this embodiment can set up to high rotational speed grade, compares current rotational speed and first predetermined rotational speed, promptly, judges whether the current rotational speed grade of fan reaches high rotational speed grade.
Step S33, when the current rotating speed is less than the first preset rotating speed, controlling the fan to increase to the first preset rotating speed for operation;
after the current rotating speed of the fan is compared with the first preset rotating speed, when the current rotating speed is judged to be smaller than the first preset rotating speed, the fan is controlled to be increased to the first preset rotating speed for operation, namely, when the current rotating speed grade of the fan does not reach a high rotating speed grade, for example, when the current rotating speed grade of the fan is judged to be a medium rotating speed, the fan is controlled to be increased to the high rotating speed for operation, so that the air supply quantity of the fan is increased, the cooling speed of the gas mixing distribution chamber is increased, the temperature of the gas mixing distribution chamber is reduced to a temperature which does not have a tempering risk in a short time, the tempering phenomenon in the gas mixing distribution chamber is effectively prevented, and at the moment, a gas inlet valve does not need to be controlled to be closed, and the normal operation of the gas water heater is ensured.
And step S34, controlling the gas inlet valve to close when the current rotating speed is greater than or equal to the first preset rotating speed.
After the current rotating speed of the fan is compared with the first preset rotating speed, when the current rotating speed is judged to be greater than or equal to the first preset rotating speed, for example, the fan currently runs at a high rotating speed, that is, under the condition that the air supply amount of the fan is large, the risk of backfire still exists in the gas mixing distribution chamber, the gas inlet valve is controlled to be closed, and the backfire phenomenon cannot occur in the gas mixing distribution chamber.
The cooling to the gas mixing distribution chamber is realized when this embodiment guarantees gas heater normal work through the rotational speed of adjustment fan, makes the condition that does not influence gas heater normal work get off and effectively prevents to take place the tempering phenomenon in the gas mixing distribution chamber. When the current rotating speed of the fan is greater than or equal to the first preset rotating speed, the gas mixing distribution chamber still has the risk of backfire, and then the gas inlet valve is controlled to be closed, so that the backfire phenomenon cannot occur in the gas mixing distribution chamber.
Specifically, step S33 includes:
and S330, when the current rotating speed is lower than the first preset rotating speed, controlling the fan to be increased to the first preset rotating speed to operate and operating for a first preset time according to the first preset rotating speed.
After comparing the current rotating speed of the fan with the first preset rotating speed, judging that the current rotating speed is less than the first preset rotating speed, controlling the fan to increase to the first preset rotating speed and operate for a first preset time according to the first preset rotating speed, wherein the first preset time of the embodiment can be set according to actual needs, for example, the first preset time is set to be 5 minutes. In this embodiment, when the current rotation speed level of the fan does not reach the high rotation speed level, the fan is controlled to operate at the high rotation speed level and operate for 5 minutes according to the high rotation speed level, so that the fan continuously supplies air for 5 minutes to the gas mixing and distributing chamber under the condition of a large air supply amount, and the gas mixing and distributing chamber is fully cooled.
Further, referring to fig. 3, a third embodiment S300 of the backfire preventing control method of the gas water heater of the present invention, based on the second embodiment of the backfire preventing control method of the gas water heater of the present invention, comprises the following steps after S330:
step S50, determining whether the current temperature is greater than or equal to a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;
step S60, when the current temperature is greater than or equal to the second preset temperature, controlling the gas inlet valve to close;
and step S70, when the current temperature is lower than the second preset temperature, the current temperature of the gas mixing and distributing chamber is obtained again.
In this embodiment, after the fan operates at a first preset rotation speed for a first preset time, it is determined whether the current temperature is greater than or equal to a second preset temperature, the current temperature is compared with the second preset temperature, and it is determined whether the current temperature is greater than or equal to the second preset temperature. In this embodiment, the second preset temperature is a temperature value close to the tempering temperature, and the second preset temperature is greater than the first preset temperature, and the second preset temperature may be set according to actual needs, for example, the second preset temperature is set to 145 ℃.
When the current temperature is greater than or equal to the second preset temperature, the risk of backfire in the gas mixing and distributing chamber is indicated, the gas inlet valve is controlled to be closed, the burner assembly stops burning after the gas cannot be supplied, and the gas mixing and distributing chamber is cooled; when the current temperature is lower than the second preset temperature, it is indicated that the gas mixing and distributing chamber does not have the risk of backfire, the current temperature of the gas mixing and distributing chamber is obtained again, that is, the step S10 is returned, so that the current temperature of the gas mixing and distributing chamber is monitored in real time while the gas water heater works normally, and the backfire phenomenon in the gas mixing and distributing chamber is effectively prevented. In this embodiment, by determining whether the current temperature is greater than or equal to the second preset temperature, the time when the gas mixing and distributing chamber has a risk of backfire can be accurately determined, so that frequent closing of the gas inlet valve is avoided, and an accurate anti-backfire control process is realized.
Further, referring to fig. 4, based on the third embodiment of the method for controlling backfire of the gas water heater of the present invention, in a fourth embodiment S400 of the method for controlling backfire of the gas water heater of the present invention, after step S50, the method further comprises:
and step S80, when the current temperature is greater than or equal to the second preset temperature, controlling the fan to be operated from the first preset rotating speed to a second preset rotating speed.
It can be understood that, in this embodiment, the second preset rotation speed is greater than the first preset rotation speed, and the second preset rotation speed is the maximum rotation speed of the fan. For example, the first preset rotation speed may be set to a high rotation speed level, and the second preset rotation speed may be set to an ultrahigh rotation speed level. And comparing the current temperature with the second preset temperature, and when the current temperature is greater than or equal to the second preset temperature, controlling the fan to operate from the first preset rotating speed to the maximum rotating speed while closing the gas inlet valve, namely controlling the fan to operate from a high rotating speed grade to an ultrahigh rotating speed grade, so that the air supply quantity of the fan is greatly increased, the cooling speed of the gas mixing distribution chamber is further increased, and the tempering phenomenon in the gas mixing distribution chamber is effectively prevented.
Further, based on the above-mentioned embodiments of the method for controlling backfire of a gas water heater of the present invention, in the fifth embodiment of the method for controlling backfire of a gas water heater of the present invention, after step S20, the method further comprises:
and when the current temperature is greater than or equal to the first preset temperature, controlling the gas water heater to send alarm information. The alarm information comprises at least one of sound alarm and flash alarm, and the embodiment adopts a mode of combining sound alarm and flash alarm to play a better alarm role.
Specifically, after the current temperature is compared with the first preset temperature, when the current temperature is judged to be greater than or equal to the first preset temperature, indicating that a risk of backfire may exist in the gas mixing and distributing chamber, the gas inlet valve is controlled to be closed, and the gas water heater is controlled to send alarm information, so as to prompt a user to take relevant measures in time to prevent backfire, such as power off and the like.
Further, based on the above-mentioned embodiments of the method for controlling backfire of a gas water heater of the present invention, in the sixth embodiment of the method for controlling backfire of a gas water heater of the present invention, after step S20, the method further comprises:
and when the current temperature is greater than or equal to the first preset temperature, controlling the gas water heater to display a fault code. Specifically, when the gas water heater sends alarm information, the gas water heater is controlled to display a fault code, and a user can accurately judge that the gas water heater is likely to have the risk of backfire after seeing the fault code, so that relevant measures are taken to prevent the occurrence of backfire, such as power supply cut-off and the like.
The invention also provides a gas water heater, which comprises a shell 1, a burner assembly 2, a gas inlet pipeline 3, a fan 4, a temperature sensor 5, an alarm device 6 and a controller 100, and referring to fig. 5 and 6. Wherein a combustion chamber and a gas mixing and distributing chamber 11 are formed in the housing 1, and the combustion chamber is communicated with the upper part of the gas mixing and distributing chamber 11; the burner assembly 2 is mounted within the combustion chamber; the gas inlet pipeline 3 is communicated with the lower part of the gas mixing and distributing chamber 11, the gas inlet pipeline 3 is used for conveying gas into the gas mixing and distributing chamber 11, a gas inlet valve 31 is installed on the gas inlet pipeline 3, the gas inlet valve 31 controls the on-off of the gas inlet pipeline 3, and the gas inlet valve 31 of the embodiment can adopt the prior art; the fan 4 is communicated with the lower part of the gas mixing and distributing chamber 11, the fan 4 is used for conveying combustion-supporting gas into the gas mixing and distributing chamber 11, and the combustion-supporting gas in this embodiment is air; the temperature sensor 5 is used for monitoring the temperature of the gas mixing and distributing chamber 11, and the temperature sensor 5 can be arranged on the shell 1 corresponding to the position of the gas mixing and distributing chamber 11 and is close to the combustion chamber; the temperature sensor 5, the gas inlet valve 31 and the alarm device 6 are all electrically connected with the controller 100.
The controller 100 comprises a storage unit 10, a processing unit 20 and a computer program stored on the storage unit and operable on the processing unit 20, wherein the processing unit 20 implements the steps of the anti-backfire control method of the gas water heater when executing the computer program.
It is understood that the processing unit 20 is connected to the memory unit 10 and the temperature sensor 5, respectively, and the memory unit 10 stores thereon a computer program which can be executed by the processing unit 20. The temperature sensor 5 transmits the monitored temperature signal of the gas mixing and distributing chamber 11 to the processing unit 20 for processing.
In this embodiment, the storage unit 10 may be used to store a software program and various data. The storage unit 10 may mainly include a storage program area that may store an operating system, an application program required for at least one function, and the like, and a storage data area that may store data required when the controller 100 operates, and the like. In addition, the memory unit 10 may include a high-speed random access memory unit, and may also include a non-volatile memory unit, such as at least one magnetic disk memory unit, a flash memory device, or other volatile solid-state memory unit device.
The processing unit 20, which is a control center of the controller 100, connects various parts of the gas water heater by using various interfaces and lines, and performs various functions of the gas water heater and processes data by operating or executing software programs and/or modules stored in the memory and calling data stored in the storage unit 10, thereby performing overall monitoring of the gas water heater. Processing unit 20 may include one or more processors or chips.
Based on the above structure, the present invention provides the above embodiments of the anti-backfire control method for the gas water heater.
In the working process of the gas water heater of the embodiment, air is conveyed to the gas mixing and distributing chamber 11 through the fan 4, gas is conveyed to the gas mixing and distributing chamber 11 through the gas inlet pipeline 3, the gas mixing and distributing chamber 11 is used for mixing the gas and combustion-supporting gas into mixed gas, and the mixed gas is provided for the combustion chamber, so that the burner assembly 2 in the combustion chamber can burn, and the temperature of the gas mixing and distributing chamber 11 can be increased in the burning process of the burner assembly 2.
Specifically, during the combustion of the burner assembly 2, the temperature sensor 5 monitors the current temperature of the gas mixture distribution chamber 11 and transmits a temperature signal to the controller 100, and the controller 100 receives the temperature signal and judges whether the current temperature is greater than or equal to a first preset temperature according to the temperature signal; when the current temperature is judged to be greater than or equal to the first preset temperature, the risk of backfire possibly existing in the gas mixing distribution chamber 11 is indicated, the gas inlet valve 31 is controlled to be closed, the gas inlet pipeline 3 is blocked to convey gas after the gas inlet valve 31 is closed, the burner assembly 2 stops burning after the gas cannot be supplied, the gas mixing distribution chamber 11 is cooled, the fan 4 supplies air to the gas mixing distribution chamber 11 normally when the burner assembly 2 stops burning, the rapid cooling of the gas mixing distribution chamber 11 is facilitated, and the backfire phenomenon in the gas mixing distribution chamber 11 is effectively prevented; when the current temperature is smaller than the first preset temperature, the current temperature of the gas mixing distribution chamber 11 is obtained again, and the temperature sensor 5 monitors the current temperature of the gas mixing distribution chamber 11 again, so that the current temperature of the gas mixing distribution chamber 11 is monitored in real time while the gas water heater works normally, and the backfire phenomenon in the gas mixing distribution chamber 11 is effectively prevented.
In the working process of the gas water heater of the embodiment, when the gas mixing and distributing chamber 11 has the risk of backfire, the supply of gas is cut off in time, and the gas mixing and distributing chamber 11 is cooled; when the risk of backfire does not exist in the gas mixing and distributing chamber 11, the current temperature of the gas mixing and distributing chamber 11 is monitored in real time while the gas water heater works normally, so that the backfire phenomenon in the gas mixing and distributing chamber 11 is effectively prevented, the gas water heater is prevented from being damaged, and the safety of a user is guaranteed.
In addition, when there is a possibility that the gas mixing and distributing chamber 11 is in danger of backfire, the controller 100 controls the alarm device 6 to send out an alarm message to prompt the user to take relevant measures in time to prevent backfire, such as power off. The alarm information comprises at least one of sound alarm and flash alarm, and preferably, the sound alarm and the flash alarm are combined to play a better alarm role.
Further, the alarm device 6 includes a display and a buzzer, both of which are electrically connected to the controller 100. The display and the buzzer of the present embodiment can both adopt the prior art. When there is a possibility that the gas mixing and distributing chamber 11 is in a risk of backfire, the controller 100 controls the buzzer to sound an alarm, and simultaneously informs the display to display a fault code to prompt the user to take relevant measures in time to prevent backfire.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An anti-backfire control method of a gas water heater is characterized by comprising the following steps:
acquiring the current temperature of the gas mixing and distributing chamber;
judging whether the current temperature is greater than or equal to a first preset temperature or not;
when the current temperature is greater than or equal to the first preset temperature, controlling a gas inlet valve to be closed;
when the current temperature is lower than the first preset temperature, the current temperature of the gas mixing and distributing chamber is obtained again;
when the current temperature is greater than or equal to the first preset temperature, the step of controlling the gas inlet valve to close comprises the following steps:
when the current temperature is greater than or equal to the first preset temperature, acquiring the current rotating speed of the fan;
judging whether the current rotating speed is greater than or equal to a first preset rotating speed or not;
when the current rotating speed is lower than the first preset rotating speed, controlling the fan to increase to the first preset rotating speed for operation;
and when the current rotating speed is greater than or equal to the first preset rotating speed, controlling the gas inlet valve to be closed.
2. The backfire prevention control method of a gas water heater as claimed in claim 1, wherein said step of controlling said fan to operate at said first preset rotation speed when said current rotation speed is less than said first preset rotation speed comprises:
and when the current rotating speed is less than the first preset rotating speed, controlling the fan to be increased to the first preset rotating speed for operation and operating for a first preset time according to the first preset rotating speed.
3. The method for controlling backfire as claimed in claim 2, wherein after said step of controlling said fan to operate at said first preset speed for a first preset time when said current speed is less than said first preset speed, further comprising:
judging whether the current temperature is greater than or equal to a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;
when the current temperature is greater than or equal to the second preset temperature, controlling the gas inlet valve to be closed;
and when the current temperature is lower than the second preset temperature, the current temperature of the gas mixing and distributing chamber is obtained again.
4. The method for controlling backfire as claimed in claim 3, wherein said step of judging whether said current temperature is greater than or equal to a second preset temperature further comprises, after said step of judging whether said current temperature is greater than or equal to said second preset temperature:
and when the current temperature is greater than or equal to the second preset temperature, controlling the fan to be increased from the first preset rotating speed to a second preset rotating speed for operation.
5. The method of claim 4 wherein the second predetermined speed is the maximum speed of the fan.
6. The backfire prevention control method of a gas water heater as claimed in any of claims 1-5, wherein said step of judging whether said current temperature is greater than or equal to a first preset temperature further comprises, after said step of judging whether said current temperature is greater than or equal to a first preset temperature:
and when the current temperature is greater than or equal to the first preset temperature, controlling the gas water heater to send alarm information.
7. The method of claim 6, wherein the alarm message includes at least one of an audible alarm and a flashing alarm.
8. The method for controlling backfire as claimed in claim 6, wherein said step of judging whether said current temperature is greater than or equal to a first preset temperature further comprises, after said step of judging whether said current temperature is greater than or equal to said first preset temperature:
and when the current temperature is greater than or equal to the first preset temperature, controlling the gas water heater to display a fault code.
9. A gas water heater, comprising:
the combustion chamber is communicated with the upper part of the gas mixing and distributing chamber;
a burner assembly mounted within the combustion chamber;
the gas inlet pipeline is communicated with the lower part of the gas mixing and distributing chamber and is used for conveying gas into the gas mixing and distributing chamber, and a gas inlet valve is arranged on the gas inlet pipeline;
the fan is communicated with the lower part of the gas mixing and distributing chamber and is used for conveying combustion-supporting gas into the gas mixing and distributing chamber;
a temperature sensor for monitoring the temperature of the gas mixing and dispensing chamber;
an alarm device;
the temperature sensor, the gas inlet valve and the alarm device are all electrically connected with the controller;
wherein the controller comprises a storage unit, a processing unit and a computer program stored on the storage unit and executable on the processing unit, the processing unit when executing the computer program implementing the steps of the anti-backfire control method of the gas water heater according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583717.1A CN110579022B (en) | 2018-06-07 | 2018-06-07 | Gas water heater and anti-backfire control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583717.1A CN110579022B (en) | 2018-06-07 | 2018-06-07 | Gas water heater and anti-backfire control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110579022A CN110579022A (en) | 2019-12-17 |
| CN110579022B true CN110579022B (en) | 2022-03-18 |
Family
ID=68809026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810583717.1A Active CN110579022B (en) | 2018-06-07 | 2018-06-07 | Gas water heater and anti-backfire control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110579022B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353084A (en) * | 2020-09-29 | 2022-04-15 | 芜湖美的厨卫电器制造有限公司 | Burner assembly, hot water equipment and temperature detection device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05196232A (en) * | 1991-08-01 | 1993-08-06 | General Electric Co <Ge> | Back fire-resistant fuel staging type premixed combustion apparatus |
| CN2202889Y (en) * | 1994-10-13 | 1995-07-05 | 宁波松洋燃气具有限公司 | Fire back proof device for gas water heater |
| CN2218341Y (en) * | 1995-01-20 | 1996-01-24 | 国营三益电子计算机公司 | Automatic water heater using gas fuel |
| KR20050013340A (en) * | 2003-07-28 | 2005-02-04 | 엘지전자 주식회사 | Ignition device for gas oven range |
| CN2751232Y (en) * | 2004-10-30 | 2006-01-11 | 重庆市江北区兴海机电有限责任公司 | Domestic centralized premixed gas combustor |
| CN201000068Y (en) * | 2006-12-13 | 2008-01-02 | 广东万和集团有限公司 | Combusting device flash-back fire proof safety device |
| CN102721060A (en) * | 2012-07-12 | 2012-10-10 | 穆瑞力 | Energy-efficient ceramic kiln burner |
| CN202647757U (en) * | 2012-06-13 | 2013-01-02 | 袁琳 | Efficient burner |
| CN203848291U (en) * | 2014-05-06 | 2014-09-24 | 邓延鸿 | Premixed fuel gas positive pressure burning energy-saving burner |
| CN205655298U (en) * | 2016-01-13 | 2016-10-19 | 广州市红日燃具有限公司 | Gas heater combustor with return fire control system function |
| CN106051743A (en) * | 2016-05-25 | 2016-10-26 | 江门市明星纸业有限公司 | Biogas boiler combustion system |
| CN107420892A (en) * | 2016-05-23 | 2017-12-01 | 上海钜荷热力技术有限公司 | A kind of outer circulation smoke backflow formula all-premixing burner |
| CN108019789A (en) * | 2017-12-07 | 2018-05-11 | 湖北中瑞天恒节能科技发展有限公司 | Energy-saving stove with defencive function |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004125262A (en) * | 2002-10-02 | 2004-04-22 | Rinnai Corp | Hybrid hot air heater |
| JP2004125261A (en) * | 2002-10-02 | 2004-04-22 | Rinnai Corp | Hybrid hot air heater |
| JP5450183B2 (en) * | 2010-03-15 | 2014-03-26 | 日立アプライアンス株式会社 | Heat pump water heater |
| CN105180431A (en) * | 2015-09-23 | 2015-12-23 | 赵心阁 | Air-energy heat pump water heater |
| CN106871445A (en) * | 2017-03-09 | 2017-06-20 | 广东万家乐燃气具有限公司 | A kind of gas heater with smoke circulating system |
-
2018
- 2018-06-07 CN CN201810583717.1A patent/CN110579022B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05196232A (en) * | 1991-08-01 | 1993-08-06 | General Electric Co <Ge> | Back fire-resistant fuel staging type premixed combustion apparatus |
| CN2202889Y (en) * | 1994-10-13 | 1995-07-05 | 宁波松洋燃气具有限公司 | Fire back proof device for gas water heater |
| CN2218341Y (en) * | 1995-01-20 | 1996-01-24 | 国营三益电子计算机公司 | Automatic water heater using gas fuel |
| KR20050013340A (en) * | 2003-07-28 | 2005-02-04 | 엘지전자 주식회사 | Ignition device for gas oven range |
| CN2751232Y (en) * | 2004-10-30 | 2006-01-11 | 重庆市江北区兴海机电有限责任公司 | Domestic centralized premixed gas combustor |
| CN201000068Y (en) * | 2006-12-13 | 2008-01-02 | 广东万和集团有限公司 | Combusting device flash-back fire proof safety device |
| CN202647757U (en) * | 2012-06-13 | 2013-01-02 | 袁琳 | Efficient burner |
| CN102721060A (en) * | 2012-07-12 | 2012-10-10 | 穆瑞力 | Energy-efficient ceramic kiln burner |
| CN203848291U (en) * | 2014-05-06 | 2014-09-24 | 邓延鸿 | Premixed fuel gas positive pressure burning energy-saving burner |
| CN205655298U (en) * | 2016-01-13 | 2016-10-19 | 广州市红日燃具有限公司 | Gas heater combustor with return fire control system function |
| CN107420892A (en) * | 2016-05-23 | 2017-12-01 | 上海钜荷热力技术有限公司 | A kind of outer circulation smoke backflow formula all-premixing burner |
| CN106051743A (en) * | 2016-05-25 | 2016-10-26 | 江门市明星纸业有限公司 | Biogas boiler combustion system |
| CN108019789A (en) * | 2017-12-07 | 2018-05-11 | 湖北中瑞天恒节能科技发展有限公司 | Energy-saving stove with defencive function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110579022A (en) | 2019-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110579022B (en) | Gas water heater and anti-backfire control method thereof | |
| CN107388591B (en) | Control method, control device and the computer readable storage medium of heating stove | |
| US10883729B2 (en) | Automatic firing rate control for a heat exchanger | |
| CN113260820B (en) | Apparatus and method for supplying hot water | |
| US11892199B2 (en) | Energy efficient water heater | |
| JP5247621B2 (en) | Hot water heating system | |
| US10731872B2 (en) | Water heating system | |
| CN207831701U (en) | Gas heater | |
| CN113758071B (en) | Anti-condensation control method for refrigerant heat dissipation module of water machine system | |
| JP6513553B2 (en) | Water heater | |
| KR102427113B1 (en) | Operating controlling method of boiler using exhaust temperature | |
| KR101797649B1 (en) | Heating control method based exhaust temperature | |
| JP2006226574A (en) | Hot water circulation heating device | |
| CN114608203A (en) | Exhaust gas recirculation control method of water heater, water heater and storage medium | |
| CN107228458B (en) | Air conditioning system for bathroom and control method thereof | |
| KR102342980B1 (en) | Operating controlling method of preventing boiling of water heater | |
| KR20220165969A (en) | Abnormality determination device and abnormality determination method for boiler | |
| JP2002089860A (en) | Controller of hot-water heater | |
| CN116242035A (en) | Gas water heating equipment, control method and device thereof and readable preset medium | |
| US20240328620A1 (en) | Device for heating air | |
| JP4699346B2 (en) | Hot water circulation heating system | |
| JPH0278826A (en) | Hot-water heater | |
| CN219271848U (en) | Dry heating prevention protection device for water tank and breathing machine | |
| JP2820712B2 (en) | Water heater control device | |
| KR102092219B1 (en) | Overheat prevention method of boiler when controlling returnig water temperature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230406 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Wan Chun East Road, East District, Wuhu economic and Technological Development Zone, Anhui Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. |
|
| TR01 | Transfer of patent right |