CN110940094B - Gas water heater control method and gas water heater - Google Patents
Gas water heater control method and gas water heater Download PDFInfo
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- CN110940094B CN110940094B CN201811115955.6A CN201811115955A CN110940094B CN 110940094 B CN110940094 B CN 110940094B CN 201811115955 A CN201811115955 A CN 201811115955A CN 110940094 B CN110940094 B CN 110940094B
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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
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2028—Continuous-flow heaters
Abstract
The invention discloses a gas water heater control method and a gas water heater, wherein the gas water heater control method comprises the following steps: (1) periodically detecting water flow; (2) determining the current starting water flow; (3) Judging whether the current water flow meets the current opening water flow or not, if so, executing the step (4), otherwise, returning to the step (1); (4) Controlling ignition, detecting and judging whether ignition is successful, and if so, executing the step (5); (5) Detecting whether the control parameters are changed, if so, correcting the combustion operation parameters and executing the step (6), otherwise, returning to the step (5); (6) And judging whether the current water flow meets the current cut-off water flow, if so, controlling to extinguish the fire, waiting for timing, and returning to the step (1). The control method of the invention avoids the situation of sudden water temperature rise caused by short time interval between two adjacent shutdown operations, and keeps the temperature of the outlet water constant.
Description
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a gas water heater control method and a gas water heater.
Background
When the existing gas water heater is in a starting state, when water flow is detected to be lower than a certain value (called water flow stopping), the water flow inside the gas water heater is judged, and therefore the gas water heater stops running; when the water flow detected by the gas water heater is higher than a certain value (called as starting water flow), the gas water heater judges that water flow exists inside and starts the gas water heater to ignite to enter a working state. The water flow for starting and stopping the control logic is a fixed parameter, and the numerical value is small. When the water pressure of a gas water heater user at home fluctuates, the water flow changes along with the fluctuation, and at the moment, the water heater can quickly correct working parameters according to the water flow so as to adapt to the current water flow.
The control logic of the current switch fire has the following defects: 1. when the gas water heater is working at a higher set temperature and under a high water flow state, and the water flow suddenly fluctuates in a large range, the water flow needs to be reduced below a lower stop water flow to stop working. Therefore, the lower water flow is not stopped burning (only according to water flow control burning parameters) due to the addition of residual heat in the heat exchanger to the gas water heater, so that the water temperature suddenly becomes hot for a period of time after water flow fluctuation and then returns to normal, and the constant-temperature comfortable sensation of bathing of a user is extremely poor. 2. When water flow fluctuates, the water flow is lower to below the stop water flow, and although the gas water heater stops burning, residual heat still acts on the lower water flow, so that the outlet water temperature is quickly increased, and even a user can be scalded.
Disclosure of Invention
The invention provides a control method of a gas water heater, which aims to solve the technical problems that when the ignition is restarted in a short time after the combustion of the existing gas water heater is stopped, if the conventional control logic is adopted to execute the combustion control, the temperature of water is suddenly increased due to the residual heat of a pipeline, the constant temperature control cannot be realized, and the hidden danger of scalding a user exists.
In order to solve the technical problems, the invention adopts the following technical scheme:
a control method of a gas water heater comprises the following steps:
(1) Periodically detecting water flow;
(2) Determining the current starting water flow; judging whether ignition is started for the first time after starting up;
(3) Judging whether the current water flow meets the current starting water flow, if so, executing the step (4), otherwise, returning to the step (1);
(4) Controlling ignition, detecting and judging whether ignition is successful, and if so, executing the step (5);
(5) Detecting whether the control parameters are changed, if so, correcting the combustion operation parameters and executing the step (6), otherwise, returning to the step (5);
(6) And judging whether the current water flow meets the current cut-off water flow, if so, controlling to extinguish the fire, waiting for timing, and returning to the step (1).
Further, the method for determining the current water flow rate in the step (1) comprises the following steps:
judging whether the gas water heater is started for the first time after starting, if so, judging that the current starting water flow is the preset starting water flow B First stage Otherwise, calculating to obtain the current opening water flow;
the method for judging the first start comprises the following steps: the first start is carried out after the gas water heater is powered on, or the time from the previous flameout exceeds a set threshold value, and the first start is judged when one of the conditions is met.
Further, the method for calculating the current opening water flow rate comprises the following steps:
obtaining the current set water outlet temperature T and current water flow L of the gas water heater, determining a starting water flow correction coefficient X according to the water outlet temperature T and the current water flow L,
the current on water flow = (T + L + X) × L/100.
Furthermore, a lookup table of the outlet water temperature T, the current water flow L and the starting water flow correction coefficient X is prestored in the system, and the starting water flow correction coefficient X is obtained through lookup.
Further, the step (5) detects whether the control parameters change, at least including detecting whether the water flow and/or the water outlet temperature change.
Further, if the ignition is not successfully performed in the step (4), a fault alarm is performed.
Further, the step (2) also comprises the step of determining the current cut-off water flow.
Further, the method for determining the current cut-off water flow rate in the step (2) comprises the following steps:
obtaining the current set water outlet temperature T and current water flow L of the gas water heater, determining a cut-off water flow correction coefficient F according to the water outlet temperature T and the current water flow L,
current cut-off water flow = (T + L + F) × L/100.
Furthermore, a lookup table of the outlet water temperature T, the current water flow L and the cut-off water flow correction coefficient F is prestored in the system, and the cut-off water flow correction coefficient F is obtained through lookup.
The invention also provides a gas water heater, which comprises the gas water heater control method.
Compared with the prior art, the invention has the advantages and positive effects that: the control method of the gas water heater is used for controlling the starting water flow and the stopping water flow of ignition to be no longer fixed values, but reasonably determined according to the actual operation condition of the gas water heater, and can take the waste heat of a pipeline during the previous combustion into account, so that the condition of sudden water temperature rise caused by short time intervals between two adjacent shutdown time intervals is avoided, meanwhile, in order to avoid the condition that the gas water heater is difficult to start at low water flow, the scheme determines two adjustment conditions, and when the gas water heater is judged to be started for the first time, the preset starting water flow is still adopted for starting control, so that the problems of non-starting of the gas water heater at low water flow and program logic can be avoided.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
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 embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of an embodiment of a method for controlling a gas water heater according to 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.
In the first embodiment, the gas water heater achieves the purpose of providing hot water for a user by burning water flowing through the heating heat exchanger, and for safety protection of the gas water heater, the gas water heater is controlled to be started only when water flow in the water inlet pipe or the water outlet pipe or the water flow in the water inlet pipe or the water outlet pipe exceeds a certain value, so that ignition heating is performed. In order to solve the technical problem that the water temperature fluctuation of the existing gas water heater cannot realize constant temperature due to the fact that the water pressure problem is caused by stopping fire in a short time and then starting ignition, the embodiment provides a control method of the gas water heater, and the control method can solve the problem.
As shown in fig. 1, the method for controlling a gas water heater of the present embodiment includes the following steps:
s1, periodically detecting water flow; after the gas water heater is powered on, the flow sensor starts to periodically detect water flow and sends the water flow to the control module.
S2, determining the current starting water flow; wherein, open water flow and indicate can open the water flow that the control was igniteed, when water flow satisfied when opening water flow, just can control the ignition, otherwise, do not ignite, the water flow of opening in this scheme is no longer the fixed value, but at every turn before starting the judgement, at first carry out reasonable definite opening water flow according to current gas heater's operating condition, also open water flow at present promptly to avoid the influence that the burning caused last time to the burning of next time, and lead to the condition that the fluctuation of leaving water temperature can't realize the constant temperature and go out water.
S3, judging whether the current water flow meets the current starting water flow, if so, executing the step S4, otherwise, returning to the step S1; specifically, the flow sensor detects the water flow in real time and periodically sends the water flow to the control module for judgment, the control module compares the received water flow value with the current opening water flow determined in the step S2, if the current water flow value is not less than the current opening water flow value, it is judged that the ignition condition is met, and the ignition control is executed, otherwise, the logic of detecting and judging the water flow is continuously executed.
S4, controlling ignition, detecting and judging whether ignition is successful, and if so, executing a step S5; and after the ignition condition is met, the flame sensor detects whether the ignition is successful, if so, the subsequent steps are executed, and otherwise, the control such as re-ignition or fault alarm is carried out.
S5, detecting whether the control parameters are changed, if so, correcting the combustion operation parameters and executing the step S6, otherwise, returning to the step S5; in the combustion process, whether the control parameters change or not needs to be periodically detected, and other parameters for controlling combustion, such as valve opening degree to adjust air inflow, fan rotating speed and the like, are influenced by the control parameters so as to meet the requirement of constant-temperature water outlet. The control parameters include, but are not limited to, current water flow, actual outlet water temperature and the like, and the actual outlet water temperature can be acquired through a temperature sensor arranged in the water outlet pipe.
And S6, judging whether the current water flow meets the current cut-off water flow, if so, controlling to shut down, waiting for timing, and returning to the step S1. When the water flow in the control parameter changes, the water flow fluctuates due to the fluctuation of the water pressure, and may also be related to user operations, for example, a shower head is closed to make shower gel in a bathing process, and the water flow changes due to the above reasons, and may possibly become large or small, therefore, it is necessary to continuously determine whether the current water flow reaches the current cut-off water flow, where the current cut-off water flow is a water flow value for controlling flameout under the current combustion condition, that is, when the water flow is lower than the current cut-off water flow, the control module controls the gas valve to close to further flameout, so as to prevent safety accidents and the like caused by the gasification of hot water in the heat exchange tube due to the continuous combustion with lower water flow, and the current cut-off water flow may be a fixed value set in advance, or may be obtained by recalculation before each ignition according to the current combustion condition. After controlling flameout, the gas water heater enters a standby state, and returns to the step S1, and the step of periodically detecting the water flow is continuously carried out.
When the water heater is started again, the controlled combustion parameters are related to parameters such as currently detected water flow and set temperature, and the residual heat of the previous combustion is not considered, so that the actual outlet water temperature after the secondary combustion is higher than the set outlet water temperature, after the control is stopped, standby timing is needed, the stopping time is timed, the stopping time is directly related to the influence degree during the secondary starting, the shorter the stopping time is, the larger the influence on the secondary starting is, the heat of the heat exchanger pipeline is slowly reduced along with the increase of the stopping time, the influence on the secondary starting is gradually reduced, if the water pressure is stopped due to the fluctuation of the water pressure, the water pressure is quickly recovered to be normal, and therefore, the starting time is particularly needed to be timed, and the current starting water flow is determined according to the standby time length.
The control method for the gas water heater is used for controlling the starting water flow and the stopping water flow of ignition to be no longer fixed values, but reasonably determined according to the actual operation working condition of the gas water heater, and can take the waste heat of the pipeline during the previous combustion into consideration, so that the condition of sudden water temperature rise caused by short time intervals of two adjacent shutdown operations is avoided.
As a preferred embodiment, the method for determining the current on-off water flow in step S1 is:
judging whether the gas water heater is started for the first time after starting, if so, judging that the current starting water flow is the preset starting water flow B First stage Otherwise, calculating to obtain the current opening water flow; the heat exchanger pipeline is at room temperature when the heat exchanger is started for the first time, so that no influence is caused on water in the water pipe, and the heat exchanger pipeline can be controlled according to normal combustion, so that the control of the first start is the same as the traditional combustion control, the starting water flow is a preset value, if the heat exchanger pipeline is not started for the first time, namely the current starting water flow needs to be calculated after the ignition combustion before the ignition, the situation can be divided into multiple possibilities, and further judgment is needed to finally obtain the specific starting water flow.
The method for judging the first start comprises the following steps: the first time after the gas water heater is powered on, orWhen the time from the previous flameout exceeds a set threshold, the first startup is judged to be met by one of the conditions. The time from the previous flameout is the time for the standby timing in step S6, when the time from the previous flameout exceeds the set threshold, the influence of the residual heat of the previous combustion on the secondary combustion can be ignored, the secondary combustion can be regarded as the first start, that is, the current start water flow is the preset start water flow B First stage 。
In order to avoid the situation that the gas water heater is difficult to start under low water flow in the control step, the gas water heater is started by determining two adjustment conditions, and when the gas water heater is judged to be started for the first time, the preset starting water flow is still adopted for starting control, because if the influence of the previous combustion on the current time is considered, the recalculated starting water flow is larger than the preset starting water flow B First stage The problems of non-starting of the low-water-flow gas water heater and program logic can be avoided.
The set threshold for comparison and determination with the time from the previous flameout may be set according to actual needs, for example, the set threshold may be 5s, and no specific numerical limitation is made here.
In step S2, the method for calculating the current opening water flow rate includes:
obtaining the current set outlet water temperature T and current water flow L of the gas water heater, determining a starting water flow correction coefficient X according to the outlet water temperature T and the current water flow L,
the current on water flow = (T + L + X) × L/100.
In order to conveniently and quickly search and confirm the starting water flow and improve the response time of the system, a lookup table of the water outlet temperature T, the current water flow L and the starting water flow correction coefficient X is prestored in the system, and the starting water flow correction coefficient X is obtained through the lookup table. As shown in table 1:
TABLE 1
According to the scheme, the current starting water flow is associated with the temperature set by a user and the current water flow, when the set temperature is certain, the higher the current water flow is, the smaller the starting water flow correction coefficient X is, the lower the corresponding current starting water flow is, and when the current water flow is certain, the higher the set temperature is, the smaller the starting water flow correction coefficient X is, the lower the corresponding current starting water flow is, which is consistent with the actual water use condition and conforms to the energy conservation law.
The water flow is determined to be opened according to the set water outlet temperature of the current gas water heater, the detected water flow and the correction coefficient, so that the gas water heater can enter a stop state earlier when the water flow fluctuates, and therefore bad conditions such as scalding of a user are avoided.
The cutoff water flow for controlling flameout is preferably set according to the actual working condition in the embodiment and is no longer a fixed value, because during normal combustion, the set temperature is higher, the current water flow is larger, the more heat is provided by the control combustion at the moment, the higher the heat exchange amount is provided by the heat exchange tube, and in order to prevent insufficient heat caused by water flow fluctuation, the cutoff water flow is lower at the moment, so that the insufficient heat is compensated by prolonging the combustion time, and the purpose of keeping the temperature is finally achieved, therefore, the step S2 further comprises the step of determining the current cutoff water flow.
The method for determining the current cut-off water flow in the step S2 comprises the following steps:
obtaining the current set water outlet temperature T and current water flow L of the gas water heater, determining a cut-off water flow correction coefficient F according to the water outlet temperature T and the current water flow L,
current cutoff water flow = (T + L + F) × L/100.
Similarly, a lookup table of the outlet water temperature T, the current water flow L and the cut-off water flow correction coefficient F is prestored in the system, and the cut-off water flow correction coefficient F is obtained by looking up the lookup table. As shown in table 2:
TABLE 2
Through calculating the current cut-off water flow in this scheme, the problem that when the water flow fluctuates, the heat in a period is insufficient can be solved, so that the fluctuation of the outlet water temperature is avoided, and the constant temperature control is realized.
In a second embodiment, the present embodiment provides a gas water heater, where a water flow pipeline of the gas water heater is provided with a flow sensor, a combustion assembly for combustion, a gas valve for switching gas on and off, and a control unit, and a water outlet pipe is provided with a temperature sensor for detecting a water temperature, and certainly, for control needs, the gas water heater further includes a water inlet pipe provided with a water inlet temperature sensor for detecting a water inlet temperature.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. A control method for a gas water heater is characterized by comprising the following steps:
(1) Periodically detecting water flow;
(2) Determining the current opening water flow;
(3) Judging whether the current water flow meets the current starting water flow, if so, executing the step (4), otherwise, returning to the step (1);
(4) Controlling ignition, detecting and judging whether ignition is successful, and if so, executing the step (5);
(5) Detecting whether the control parameters are changed, if so, correcting the combustion operation parameters and executing the step (6), otherwise, returning to the step (5);
(6) Judging whether the current water flow meets the current cut-off water flow or not, if so, controlling to extinguish the fire, waiting for timing, and returning to the step (1);
the starting water flow is water flow capable of being started to control ignition, the starting water flow is not a fixed value, and before starting judgment each time, the starting water flow is determined according to the actual working condition of the current gas water heater, namely the current starting water flow;
the current cut-off water flow is a water flow value used for controlling flameout under the current combustion working condition.
2. The gas water heater control method according to claim 1, wherein the method for determining the current on-water flow in step (1) is:
judging whether the gas water heater is started for the first time after being started, and if the gas water heater is started for the first time, judging that the current starting water flow is the preset starting water flow B First stage Otherwise, calculating to obtain the current opening water flow;
the method for judging the first start comprises the following steps: the first start is carried out after the gas water heater is powered on, or the time from the previous flameout exceeds a set threshold value, and the first start is judged when one of the conditions is met.
3. The gas water heater control method according to claim 2, wherein the method of calculating the current on-water flow is:
obtaining the current set water outlet temperature T and current water flow L of the gas water heater, determining a starting water flow correction coefficient X according to the water outlet temperature T and the current water flow L,
the current on water flow = (T + L + X) × L/100.
4. The gas water heater control method according to claim 3, wherein a lookup table of the outlet water temperature T, the current water flow L and the starting water flow correction coefficient X is prestored in the system, and the starting water flow correction coefficient X is obtained by the lookup table.
5. The gas water heater control method according to claim 1, wherein the detecting in step (5) detects whether the control parameter changes, at least including detecting whether the water flow and/or the outlet water temperature changes.
6. The gas water heater control method according to claim 1, wherein a malfunction alarm is performed if the ignition is not successfully performed in step (4).
7. The gas water heater control method according to any one of claims 1-6, wherein the step (2) further comprises the step of determining a current cutoff water flow rate.
8. The gas water heater control method according to claim 7, wherein the method of determining the current cutoff water flow rate in step (2) is:
obtaining the current set water outlet temperature T and current water flow L of the gas water heater, determining a cut-off water flow correction coefficient F according to the water outlet temperature T and the current water flow L,
current cutoff water flow = (T + L + F) × L/100.
9. The gas water heater control method according to claim 8, wherein a lookup table of the outlet water temperature T, the current water flow L and a cut-off water flow correction factor F is prestored in the system, and the cut-off water flow correction factor F is obtained by the lookup table.
10. A gas water heater comprising the gas water heater control method of any one of claims 1 to 9.
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| CN115143635B (en) * | 2021-03-30 | 2023-12-12 | 青岛经济技术开发区海尔热水器有限公司 | Combustion state management method of gas water heater and gas water heater |
| CN113883716A (en) * | 2021-10-28 | 2022-01-04 | 上海林内有限公司 | Gas water heater with water consumption point blockage monitoring function |
| CN114251840A (en) * | 2021-11-23 | 2022-03-29 | 华帝股份有限公司 | Control method of water heater and water heater |
| CN113983694B (en) * | 2021-11-25 | 2023-06-02 | 华帝股份有限公司 | Control method for minimum load matching start flow of gas water heater |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140075470A (en) * | 2012-12-11 | 2014-06-19 | 주식회사 경동나비엔 | Method for controlling temperature of hot-water according to changing of flow-rate |
| CN204757339U (en) * | 2015-07-07 | 2015-11-11 | 广东诺科冷暖设备有限公司 | Device has bathroom to intake temperature sensor's gas to adopt warm water stove |
| CN105571142A (en) * | 2016-01-04 | 2016-05-11 | 湖南工业大学 | Constant-temperature gas water heater with remote temperature regulation and cold water heat compensation control functions |
| KR101635897B1 (en) * | 2015-02-26 | 2016-07-04 | 린나이코리아 주식회사 | Water leakage blocking of the boiler and water heater with a flow control valve |
| CN107917534A (en) * | 2016-10-10 | 2018-04-17 | 青岛经济技术开发区海尔热水器有限公司 | A kind of current amount control method and gas heater |
| CN107965917A (en) * | 2017-04-14 | 2018-04-27 | 宁波方太厨具有限公司 | A kind of control method of gas heater |
| CN108444110A (en) * | 2018-04-11 | 2018-08-24 | 南通大学 | Air source heat pump hot water system design method based on BP neural network forecasts |
-
2018
- 2018-09-25 CN CN201811115955.6A patent/CN110940094B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140075470A (en) * | 2012-12-11 | 2014-06-19 | 주식회사 경동나비엔 | Method for controlling temperature of hot-water according to changing of flow-rate |
| KR101635897B1 (en) * | 2015-02-26 | 2016-07-04 | 린나이코리아 주식회사 | Water leakage blocking of the boiler and water heater with a flow control valve |
| CN204757339U (en) * | 2015-07-07 | 2015-11-11 | 广东诺科冷暖设备有限公司 | Device has bathroom to intake temperature sensor's gas to adopt warm water stove |
| CN105571142A (en) * | 2016-01-04 | 2016-05-11 | 湖南工业大学 | Constant-temperature gas water heater with remote temperature regulation and cold water heat compensation control functions |
| CN107917534A (en) * | 2016-10-10 | 2018-04-17 | 青岛经济技术开发区海尔热水器有限公司 | A kind of current amount control method and gas heater |
| CN107965917A (en) * | 2017-04-14 | 2018-04-27 | 宁波方太厨具有限公司 | A kind of control method of gas heater |
| CN108444110A (en) * | 2018-04-11 | 2018-08-24 | 南通大学 | Air source heat pump hot water system design method based on BP neural network forecasts |
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