CN114992872A - Gas water heater and control method thereof - Google Patents
Gas water heater and control method thereof Download PDFInfo
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- CN114992872A CN114992872A CN202110585401.8A CN202110585401A CN114992872A CN 114992872 A CN114992872 A CN 114992872A CN 202110585401 A CN202110585401 A CN 202110585401A CN 114992872 A CN114992872 A CN 114992872A
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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
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M11/00—Safety arrangements
- F23M11/04—Means for supervising combustion, e.g. windows
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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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using fluid fuel
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a gas water heater and a control method thereof, wherein the control method comprises the following steps: s1, acquiring an ignition command; s2, detecting and storing an initial flame current value I0; s3, an igniter is subjected to discharge ignition, a gas valve is opened, the flame current value I1 is detected in real time, and the difference delta I is I1-I0; s4, judging whether the valve opening time Delta T is smaller than the first set time Tset1, if yes, executing a step S5 and executing a step S6; s5, judging whether the difference delta I is larger than a first current set value Iset1, if so, outputting a flame signal, judging whether the difference delta I is smaller than a second current set value Iset2, and if so, outputting a flame signal; s6, judging whether the difference delta I is larger than a third current set value Iset3, if yes, outputting a flame signal, and judging the difference deltaWhether I is smaller than a fourth current set value Iset4, if so, outputting a no flame signal; wherein Iset1 ═ Iset2+ I Return difference 1 ，Iset3＝Iset4+I Return difference 2 (ii) a Iset3 is greater than Iset 1; iset4 is greater than Iset 2. The invention can self-adapt to the change of the environment to judge whether the flame signal exists or not.
Description
Technical Field
The invention belongs to the technical field of gas equipment, and particularly relates to a gas water heater and a control method thereof.
Background
Because the ionic current of flame after ignition and combustion of the gas water heater is very weak, the existence of the flame is judged between a few tenths of microamperes and two microamperes. The sensing circuit must have and maintain a high input impedance, including in high humidity, low temperature environments.
The high-resistance resistor of the related circuit on the PCB board of the water heater is in an exposed state, the equivalent resistance value is reduced under high humidity, the judgment value is drifted, and the condition that flame exists is judged when flame does not exist or is not exists. In wet weather, particularly in the southern rainy weather, users are often heard complaining that the machine is not working on fire, resulting in poor user experience.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a control method of a gas water heater, wherein the parasitic basic flame value of a flame detection circuit is obtained before the valve is opened, which is equivalent to learning whether the environment humidity, the temperature and an induction needle are scaled, the true value of flame detection is obtained after the valve is opened, and difference processing is carried out, so that even if the flame combustion state is not good, a small change value can be obtained, and the real flame can be accurately detected; and the flame is detected by two different preset values, and the later current set value is higher than the previous current set value, so that the flame detection is doubly guaranteed, the judgment is accurate, and the precision is higher.
In order to solve the technical problems, the invention adopts the technical scheme that:
a control method of a gas water heater comprises the following steps:
s1, acquiring an ignition command;
s2, detecting and storing an initial flame current value I0 in the flame detection circuit at the current moment;
s3, controlling an igniter to discharge and ignite, opening a gas valve, detecting the flame current value I1 in real time, and obtaining a difference value delta I which is I1-I0;
s4, acquiring a time difference value delta T between the moment of detecting the flame current value I1 in the flame detection circuit in real time and the moment of controlling the ignition of the igniter, judging whether the delta T is smaller than a first set time Tset1, if so, executing a step S5, and if not, executing a step S6;
s5, judging whether the difference value delta I is larger than a first current set value Iset1, if so, controlling the flame detection circuit to output a signal with flame, judging whether the difference value delta I is smaller than a second current set value Iset2, and if so, controlling the flame detection circuit to output a signal without flame;
s6, judging whether the difference value delta I is larger than a third current set value Iset3, if so, controlling the flame detection circuit to output a signal with flame, judging whether the difference value delta I is smaller than a fourth current set value Iset4, and if so, controlling the flame detection circuit to output a signal without flame;
wherein Iset1 ═ Iset2+ I Return difference1 ，Iset3＝Iset4+I Return difference 2 ；
Iset3 is greater than Iset 1; iset4 is greater than Iset 2.
Further, step S4 includes:
judging whether the delta T is smaller than a second set time Tset2, if so, judging whether a flame current value I1 in a flame detection circuit is smaller than a fifth current set value Iset5, and if so, controlling the burner to operate at ignition power;
wherein, Tset2 is (1/3 ~ 1/2) Tset 1.
Further, the steps S5 and S6 further include:
and after controlling the flame detection circuit to output a flame signal, judging whether a flame current value I1 in the flame detection circuit is greater than a sixth current set value Iset6, if so, judging whether the duration of the flame current value I1 in the flame detection circuit, which is greater than the sixth current set value Iset6, is greater than a third set time Tset3, and if so, controlling the burner and the gas valve to be closed.
Further, the steps S5 and S6 further include:
and after the flame detection circuit is controlled to output a signal of no flame, the igniter is controlled to discharge and ignite again.
Further, the steps S5 and S6 further include:
and judging whether the number of times of discharging and igniting the igniter again exceeds the preset number of times, if so, controlling the alarm to send out an alarm signal.
Further, step a1 is further included between step S1 and step S2:
controlling the fan to start, entering a front cleaning process, simultaneously acquiring a flame current value I0 in a flame detection circuit, judging whether the flame current value I0 at the current moment is greater than a seventh current set value Iset7, if so, judging whether the duration time that the flame current value I0 at the current moment is greater than the seventh current set value Iset7 is greater than a fourth set time Tset4, if so, executing a step S2, and if not, controlling an alarm to send an alarm signal.
Further, step S5 includes determining whether the difference Δ I is greater than the first current setting Iset1, if so, determining whether the duration that the difference Δ I is greater than the first current setting Iset1 is greater than a fifth setting time Tset5, and if so, controlling the flame detection circuit to output a signal indicating that flame is present; judging whether the difference delta I is smaller than a second current set value Iset2, if so, judging whether the duration time of the difference delta I smaller than the second current set value Iset2 is longer than a sixth set time Tset6, and if so, controlling the flame detection circuit to output a signal without flame;
preferably, Tset5 is 0.5s to 0.8s, and Tset6 is 0.5s to 0.8 s.
Further, step S6 includes determining whether the difference Δ I is greater than a third current setting Iset3, if so, determining whether a duration of the difference Δ I being greater than the third current setting Iset3 is greater than a seventh setting time Tset7, and if so, controlling the flame detection circuit to output a signal indicating that flame is present; judging whether the difference value delta I is smaller than a fourth current set value Iset4, if so, judging whether the duration time of the difference value delta I smaller than a fourth current set value Iset4 is longer than eighth set time Tset8, and if so, controlling a flame detection circuit to output a signal without flame;
preferably, Tset7 is 0.5s to 0.8s, and Tset8 is 0.5s to 0.8 s.
Further, I Return difference 1 Taking 0.2-0.4; i is Return difference 2 Taking 0.2-0.4.
A gas water heater adopts the control method.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
1. The invention adopts the flame current value in the flame detection circuit when receiving the ignition command as the comparison value for judging whether the flame exists or not, so that the comparison value is the comparison value which changes along with the change of the environment.
2. The invention obtains the parasitic basic flame value of the flame detection circuit before the valve is opened, which is equivalent to learning whether the ambient humidity, the temperature and the induction needle are scaled, and obtains the true value of the flame current in the flame detection circuit after the valve is opened to perform difference processing with the initial value of the flame current, therefore, even if the flame combustion state is not good, the small change value can be captured, and the real flame can be accurately detected.
3. According to the time length of the ignition time of the distance control igniter, the flame is judged at least twice, the flame is detected by utilizing different set values twice, and the later current set value is higher than the earlier current set value, so that the flame detection has double guarantees, the judgment is accurate, and the precision is higher.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments and that for a person skilled in the art, other drawings can be derived from them without paying any inventive effort. In the drawings:
FIG. 1 is a schematic flow chart of a method of controlling a gas water heater in accordance with some embodiments of the present invention;
FIG. 2 is a flow chart schematic of a method of controlling a gas water heater according to another embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for controlling a gas water heater according to still other embodiments of the present invention.
It should be noted that the drawings and the description are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention for those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, e.g., as being fixed or detachable or integral; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the present invention provides a gas water heater and a control method thereof. In detail, the gas water heater generally includes a main control panel, a water flow sensor, an igniter, a burner, a fan, a gas valve, and the like. The main control board is a computer board MCU for overall control of the operation of the gas water heater. When a user uses the gas water heater, the water flow sensor detects water flow information and feeds the water flow information back to the main control board, and after the main control board receives the water flow information, the main control board controls the igniter to discharge and the opening degree of the gas valve to complete ignition.
Generally, in the working process of a gas water heater, the state of flame needs to be monitored, and the dangerous conditions that the flame is abnormally extinguished, gas leakage and the like in normal work are avoided.
The flame has two main characteristics: ionic and unidirectional conductivity. Ionic means that the flame has a weak conductivity, generally equivalent to between 1M and 10M ohms. However, if dust or oil stains are dropped between the burner and the detection probe, there will be electrical resistance, and it is easy to determine the presence of flame by mistake, so the ionicity of flame is generally not used as a criterion for determining the presence or absence of flame. The unidirectional conductivity is the characteristic that flame has the same as that of a diode, namely the unidirectional conductivity, so that whether flame exists or not can be judged by utilizing the unidirectional conductivity of the flame, and the unidirectional conductivity is used as the premise for controlling other parts of the water heater subsequently.
Specifically, as shown in fig. 1, the control method of the gas water heater includes the following steps:
s1, acquiring an ignition command;
s2, detecting and storing an initial flame current value I0 in the flame detection circuit at the current moment;
s3, controlling an igniter to discharge and ignite, opening a gas valve, detecting the flame current value I1 in real time, and obtaining a difference value delta I which is I1-I0;
s4, acquiring a time difference value delta T between the moment of detecting the flame current value I1 in the flame detection circuit in real time and the moment of controlling the ignition of the igniter, judging whether the delta T is smaller than a first set time Tset1, if so, executing a step S5, and if not, executing a step S6;
s5, judging whether the difference value delta I is larger than a first current set value Iset1, if so, controlling the flame detection circuit to output a signal with flame, judging whether the difference value delta I is smaller than a second current set value Iset2, and if so, controlling the flame detection circuit to output a signal without flame;
s6, judging whether the difference value delta I is larger than a third current set value Iset3, if so, controlling the flame detection circuit to output a signal with flame, judging whether the difference value delta I is smaller than a fourth current set value Iset4, and if so, controlling the flame detection circuit to output a signal without flame;
wherein Iset1 ═ Iset2+ I Return difference 1 ，Iset3＝Iset4+I Return difference 2 ；
Iset3 is greater than Iset 1; iset4 is greater than Iset 2.
The flame detection may be performed in a plurality of stages according to time. The invention is described in detail in two stages only.
When the main control board receives an ignition command, the invention detects the initial flame current value I0 in the flame detection circuit at the current moment, and stores the initial flame current value I0 at the current moment as a basis for judging whether the ignition is successful.
That is, the parasitic base flame value of the flame detection circuit is acquired before the valve is opened, which is equivalent to learning whether the environment humidity, the temperature and the sensing needle are scaled, and the true value of the flame current in the flame detection circuit is acquired after the valve is opened, and is processed by the difference value with the initial value of the flame current, so that even when the flame combustion state is not good, a small variation value can be captured, and the real flame can be accurately detected. In addition, according to the time length of the ignition time of the distance control igniter, the flame is judged at least twice, the flame is detected by utilizing different setting values twice, and the later current setting value is higher than the previous current setting value, so that the flame detection has double guarantees, the judgment is accurate, and the precision is higher.
In the above scheme, because the flame current value in the flame detection circuit of the gas water heater is different according to different environments in which the gas water heater is located, the flame current value in the flame detection circuit when the ignition command is received is used as a comparison value for judging whether flame exists, so that the comparison value is a comparison value which changes along with the change of the environment.
In some embodiments of the present invention, as shown in fig. 2, step S5 includes determining whether the difference Δ I is greater than the first current setting Iset1, if so, determining whether the duration that the difference Δ I is greater than the first current setting Iset1 is greater than the fifth setting time Tset5, and if so, controlling the flame detection circuit to output a flame signal; and judging whether the difference delta I is smaller than the second current set value Iset2, if so, judging whether the duration time of the difference delta I smaller than the second current set value Iset2 is longer than the sixth set time Tset6, and if so, controlling the flame detection circuit to output a signal of no flame.
Step S6 includes determining whether the difference Δ I is greater than the third current setting Iset3, if so, determining whether the duration of the difference Δ I greater than the third current setting Iset3 is greater than the seventh setting time Tset7, and if so, controlling the flame detection circuit to output a signal indicating that there is flame; judging whether the difference value delta I is smaller than a fourth current set value Iset4, if so, judging whether the duration time of the difference value delta I smaller than a fourth current set value Iset4 is longer than an eighth set time Tset8, and if so, controlling a flame detection circuit to output a signal without flame;
in a preferable scheme, the Tset5 is 0.5 s-0.8 s; tset6 is 0.5 s-0.8 s; tset7 is 0.5 s-0.8 s, Tset8 is 0.5 s-0.8 s; I.C. A Return difference 1 Taking 0.2-0.4; I.C. A Return difference 2 Taking 0.2-0.4.
In the scheme, when the flame is judged to exist, a judgment condition of duration is added, so that the situation that the control signal is frequently output due to the fluctuation of the flame current value caused by the instability of the flame can be avoided.
For example, Tset1 was 30s, Iset1 was 0.3uA, Iset2 was 0.1uA, Iset3 was 0.8uA, Iset4 was 0.5uA, Tset5 was 0.5s, and Tset6 was 0.8 s.
If the ignition time is less than 30s, if the difference value delta I is more than 0.3uA and continuously exceeds 0.5s, the flame is judged to exist, and if the difference value delta I is less than 0.1uA and continuously exceeds 0.8s, the flame is judged to be not existed; when the ignition time is more than or equal to 30s, when the difference value delta I is more than 0.8uA and continuously exceeds 0.5s, the flame is judged to be present, and when the difference value delta I is less than 0.5uA and continuously exceeds 0.8s, the flame is judged to be absent.
It should be noted that the above parameters may be different according to different models of gas water heaters, and may also be different according to different environments of the gas water heaters.
After the flame detection circuit outputs a flame signal, it indicates that the ignition is successful, and at the moment, the main control board can adjust the opening of the gas valve in real time according to the water flow signal of the water flow sensor so as to adjust the size of the flame, so that the gas water heater can operate according to the actual heat requirement of a user.
When the flame detection circuit outputs a signal that no flame exists, the main control board can control the igniter to discharge and ignite again. At the moment, whether the number of times of re-discharging and igniting of the igniter exceeds the preset number of times needs to be judged, and if yes, the alarm is controlled to send out an alarm signal.
In the above scheme, the induction needle is heated through multiple times of ignition, and the success rate of ignition can be improved. However, the invention also sets a limit value for the number of repeated ignition, if the flame can not be detected for a plurality of times of repeated ignition, a fault is reported, and a user can inform a maintainer to maintain the water heater, thereby avoiding the potential safety hazard caused by using the water heater with the fault.
In some embodiments of the present invention, as shown in fig. 3, a step a1 is further included between step S1 and step S2: controlling the fan to start, entering a front cleaning process, simultaneously acquiring a flame current value I0 in a flame detection circuit, judging whether the flame current value I0 at the current moment is greater than a seventh current set value Iset7, if so, judging whether the duration time that the flame current value I0 at the current moment is greater than the seventh current set value Iset7 is greater than a fourth set time Tset4, if so, executing a step S2, and if not, controlling an alarm to send an alarm signal.
The function of step a1 in the above scheme is to detect a fault in the flame detection circuit. Generally speaking, after the water flow sensor of water heater sensed the change of water flow, send the instruction of igniteing to the main control board, in order to can in time successfully ignite and the ignition after the ignition condition is better, the main control board should control the fan earlier before control point firearm discharge and start, carry out preceding cleaning process, so can detect flame detection circuit before carrying out the in-process of cleaning before carrying out, judge whether it breaks down, if flame detection circuit has broken down, the alarm of reporting the trouble, if flame detection circuit does not have the trouble then can carry out follow-up flow.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A control method of a gas water heater is characterized by comprising the following steps: the method comprises the following steps:
s1, acquiring an ignition command;
s2, detecting and storing an initial flame current value I0 in the flame detection circuit at the current moment;
s3, controlling an igniter to discharge and ignite, opening a gas valve, detecting the flame current value I1 in real time, and obtaining the difference delta I which is I1-I0;
s4, acquiring a time difference value delta T between the moment of detecting the flame current value I1 in the flame detection circuit in real time and the moment of controlling the ignition of the igniter, judging whether the delta T is smaller than a first set time Tset1, if so, executing a step S5, and if not, executing a step S6;
s5, judging whether the difference value delta I is larger than a first current set value Iset1, if so, controlling the flame detection circuit to output a signal with flame, judging whether the difference value delta I is smaller than a second current set value Iset2, and if so, controlling the flame detection circuit to output a signal without flame;
s6, judging whether the difference value delta I is larger than a third current set value Iset3, if so, controlling the flame detection circuit to output a signal with flame, judging whether the difference value delta I is smaller than a fourth current set value Iset4, and if so, controlling the flame detection circuit to output a signal without flame;
wherein Iset1 ═ Iset2+ I Return difference 1 ，Iset3＝Iset4+I Return difference 2 ；
Iset3 is greater than Iset 1; iset4 is greater than Iset 2.
2. A gas water heater control method according to claim 1, characterized in that:
step S4 further includes:
judging whether the delta T is smaller than a second set time Tset2, if so, judging whether a flame current value I1 in a flame detection circuit is smaller than a fifth current set value Iset5, and if so, controlling the burner to operate at ignition power;
wherein, Tset2 is (1/3 ~ 1/2) Tset 1.
3. A gas water heater control method according to claim 1, characterized in that:
the steps S5 and S6 further include:
and after controlling the flame detection circuit to output a flame signal, judging whether a flame current value I1 in the flame detection circuit is greater than a sixth current set value Iset6, if so, judging whether the duration time that the flame current value I1 in the flame detection circuit is greater than the sixth current set value Iset6 is greater than a third set time Tset3, and if so, controlling the burner and the gas valve to be closed.
4. A gas water heater control method according to claim 1, characterized in that:
the steps S5 and S6 further include:
and after the flame detection circuit is controlled to output a signal of no flame, the igniter is controlled to discharge and ignite again.
5. The gas water heater control method according to claim 4, wherein:
the steps S5 and S6 further include:
and judging whether the number of times of re-discharging and igniting the igniter exceeds the preset number of times, if so, controlling the alarm to send out an alarm signal.
6. A gas water heater control method according to claim 1, characterized in that:
step a1 is further included between step S1 and step S2:
controlling the fan to start, entering a front cleaning process, simultaneously acquiring a flame current value I0 in the flame detection circuit, judging whether the flame current value I0 at the current moment is larger than a seventh current set value Iset7, if so, judging whether the duration time that the flame current value I0 at the current moment is larger than the seventh current set value Iset7 is larger than fourth set time Tset4, if so, executing step S2, and if not, controlling the alarm to send an alarm signal.
7. A gas water heater control method according to any one of claims 1-6, characterized in that:
step S5 includes determining whether the difference Δ I is greater than the first current setting Iset1, if yes, determining whether the duration of the difference Δ I greater than the first current setting Iset1 is greater than the fifth setting time Tset5, and if yes, controlling the flame detection circuit to output a flame signal; judging whether the difference value delta I is smaller than a second current set value Iset2, if so, judging whether the duration time of the difference value delta I smaller than a second current set value Iset2 is longer than a sixth set time Tset6, and if so, controlling the flame detection circuit to output a signal without flame;
preferably, Tset5 is 0.5s to 0.8s, and Tset6 is 0.5s to 0.8 s.
8. A gas water heater control method according to any one of claims 1-6, characterized in that:
step S6 includes determining whether the difference Δ I is greater than the third current setting Iset3, if so, determining whether the duration of the difference Δ I greater than the third current setting Iset3 is greater than the seventh setting time Tset7, and if so, controlling the flame detection circuit to output a signal indicating that flame is present; judging whether the difference value delta I is smaller than a fourth current set value Iset4, if so, judging whether the duration time of the difference value delta I smaller than a fourth current set value Iset4 is longer than eighth set time Tset8, and if so, controlling a flame detection circuit to output a signal without flame;
preferably, Tset7 is 0.5s to 0.8s, and Tset8 is 0.5s to 0.8 s.
9. A gas water heater control method according to any one of claims 1-6, characterized in that:
I return difference 1 Taking 0.2-0.4; i is Return difference 2 Taking 0.2-0.4.
10. A gas water heater is characterized in that: a control method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110585401.8A CN114992872A (en) | 2021-05-27 | 2021-05-27 | Gas water heater and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110585401.8A CN114992872A (en) | 2021-05-27 | 2021-05-27 | Gas water heater and control method thereof |
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| CN114992872A true CN114992872A (en) | 2022-09-02 |
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2021
- 2021-05-27 CN CN202110585401.8A patent/CN114992872A/en active Pending
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