CN113883725B - Water heater start-stop control method, water heater and readable storage medium - Google Patents
Water heater start-stop control method, water heater and readable storage medium Download PDFInfo
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- CN113883725B CN113883725B CN202111262316.4A CN202111262316A CN113883725B CN 113883725 B CN113883725 B CN 113883725B CN 202111262316 A CN202111262316 A CN 202111262316A CN 113883725 B CN113883725 B CN 113883725B
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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
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- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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Abstract
The invention discloses a control method for starting and stopping a water heater, the water heater and a readable storage medium, wherein the control method comprises the following steps: acquiring a first water outlet temperature and a return water temperature when the water heater stops heating and a second water outlet temperature after the water pump rear circulation is finished; obtaining the fault type of the water heater based on the first water outlet temperature, the return water temperature and the second water outlet temperature; and executing corresponding shutdown control operation according to the fault type. The method comprises the steps of obtaining a fault type related to shutdown of the water heater based on the obtained first water outlet temperature and return water temperature when the water heater stops heating and a second water outlet temperature after the water pump is cycled; different shutdown control operations are executed according to different fault types, the start and the stop of the water heater can be effectively controlled, the probability of frequent start and stop of the water heater is reduced, the service life of the water heater is prolonged, the noise of a machine is reduced, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of intelligent control, in particular to a water heater start-stop control method, a water heater and a readable storage medium.
Background
In a user home, a heating room is generally subjected to heat preservation treatment, and a machine (such as a water heater) may be installed in a balcony or an equipment room with relatively low ambient temperature or good ventilation, in which case, the temperature of the machine side is relatively fast reduced compared with that of the user side, and when the temperature of the water outlet end of the machine reaches the starting temperature of the machine in a heating intermittent standby state, the temperature of the user side does not reach, which may cause the machine to be stopped due to high temperature of return water from the user side after the machine is started. After the machine is stopped, the temperature of the water outlet end quickly reaches the starting condition of the machine due to the fact that the temperature of the machine side is reduced quickly, and the machine can be started and stopped frequently in a short time. And also can cause the water heater to frequently open and stop because other troubles also can cause the water heater to frequently open and stop in the use of water heater, but can't judge the concrete reason that causes the water heater to frequently start among the prior art, and frequently open and stop and can influence machine performance and life, and the noise that frequently opens and stops simultaneously also can influence user experience.
Disclosure of Invention
The invention aims to overcome the defect that the performance, the service life and the user experience of a water heater are affected due to frequent starting and stopping of the water heater in the using process in the prior art, and provides a control method for starting and stopping the water heater, the water heater and a readable storage medium.
The invention solves the technical problems through the following technical scheme:
the invention provides a control method for starting and stopping a water heater, which comprises the following steps:
acquiring a first outlet water temperature and a return water temperature when the water heater stops heating and a second outlet water temperature after the water pump rear circulation is finished;
obtaining a fault type of the water heater based on the first water outlet temperature, the return water temperature and the second water outlet temperature, wherein the fault type is a fault type related to shutdown of the water heater;
executing corresponding shutdown control operation according to the fault type;
wherein the shutdown control operation comprises at least one of adjusting a shutdown wait time, adjusting a post-pump cycle time, and controlling the water heater to shutdown.
Preferably, the step of obtaining the fault type of the water heater based on the first outlet water temperature, the return water temperature and the second outlet water temperature includes:
acquiring the set temperature of the water heater;
acquiring a first temperature difference value of a first outlet water temperature and a return water temperature when the water heater stops heating, and a second temperature difference value of a second outlet water temperature and a set temperature of the water heater after the water pump post-circulation is finished;
and obtaining the fault type of the water heater according to the first temperature difference value and the second temperature difference value.
Preferably, the fault type includes at least one of a short heating circuit, air bubble accumulation in a pipeline and water pump stagnation, and the step of obtaining the fault type of the water heater according to the first temperature difference and the second temperature difference includes:
if the first temperature difference value is smaller than a first temperature preset value and the second temperature difference value is smaller than a second temperature preset value, determining that the fault type is that a heating loop is short;
if the first temperature difference value is larger than the first temperature preset value, determining that the fault type is bubble aggregation in the pipeline;
and if the first temperature difference value is smaller than the first temperature preset value and the second temperature difference value is larger than the second temperature preset value, determining that the fault type is water pump clamping stagnation.
Preferably, the fault type includes a short heating circuit, and the step of performing the corresponding shutdown control operation according to the fault type includes:
setting a corresponding relation table of a combustion duration interval and a shutdown waiting correction duration, wherein the corresponding relation table comprises a plurality of combustion duration intervals and different shutdown waiting correction durations corresponding to the combustion duration intervals;
acquiring the last single combustion time length before the water heater stops heating;
matching the single combustion time length with the corresponding relation table to obtain a target shutdown waiting correction time length corresponding to the single combustion time length;
acquiring the current shutdown waiting time of the water heater in a heating mode;
and adjusting the current shutdown waiting time of the water heater in the heating mode based on the target shutdown waiting correction time.
Preferably, the fault type includes bubble accumulation in the pipeline, and the step of executing the corresponding shutdown control operation according to the fault type includes:
adjusting the cycle time after the water pump;
obtaining the shutdown times caused by the accumulation of bubbles in the pipeline in a first preset period;
and if the number of times of shutdown exceeds the preset number of times of shutdown, triggering auxiliary exhaust equipment to automatically exhaust.
Preferably, the fault type is water pump sticking, and the step of executing the corresponding shutdown control operation according to the fault type includes:
and controlling the water heater to stop and outputting fault prompt information.
Preferably, the control method further includes:
judging whether the water heater is burnt for the first time, if not, judging whether the current mode is a heating mode, and if so, detecting the running state of the water heater; and adjusting the running frequency and the running time of the water heater in the heating mode according to the running state.
Preferably, if it is determined that the current mode is the bathing mode, the control method further includes:
obtaining the halt waiting time after the last bathing is finished;
and if the shutdown waiting time length is judged to reach a first preset time length, controlling the water heater to burn under the condition that the first water outlet temperature meets the combustion starting condition.
Preferably, if it is determined that the current mode is the heating mode, the control method further includes:
and judging whether the current combustion time length in the heating mode is less than a second preset time length, if so, executing the step of acquiring a first outlet water temperature and a return water temperature when the water heater stops heating and a second outlet water temperature after the water pump post-circulation is finished.
The invention provides a control system for starting and stopping a water heater, which comprises a first acquisition module, a second acquisition module and a first execution module;
the first acquisition module is used for acquiring a first outlet water temperature and a return water temperature when the water heater stops heating and a second outlet water temperature after the water pump rear circulation is finished;
the second obtaining module is used for obtaining a fault type of the water heater based on the first water outlet temperature, the return water temperature and the second water outlet temperature, wherein the fault type is a fault type related to shutdown of the water heater;
the first execution module is used for executing corresponding shutdown control operation according to the fault type;
wherein the shutdown control operation comprises at least one of adjusting a shutdown wait time, adjusting a post-pump cycle time, and controlling the water heater to shutdown.
Preferably, the second obtaining module includes a first obtaining unit, a second obtaining unit and a third obtaining unit;
the first acquisition unit is used for acquiring the set temperature of the water heater;
the second acquisition unit is used for acquiring a first temperature difference value between a first outlet water temperature and a return water temperature when the water heater stops heating and a second temperature difference value between a second outlet water temperature after the water pump rear circulation is finished and the set temperature of the water heater;
and the third obtaining unit is used for obtaining the fault type of the water heater according to the first temperature difference value and the second temperature difference value.
Preferably, the fault type includes at least one of short heating loop, air bubble accumulation in the pipeline and water pump jamming, and the third obtaining unit includes a first determining subunit, a second determining subunit and a third determining subunit;
the first determining subunit is configured to determine that the fault type is a heating loop that is short if the first temperature difference is smaller than a first temperature preset value and the second temperature difference is smaller than a second temperature preset value;
the second determining subunit is configured to determine that the fault type is bubble accumulation in the pipeline if the first temperature difference is greater than the first temperature preset value;
the third determining subunit is configured to determine that the fault type is water pump sticking if the first temperature difference is smaller than the first temperature preset value and the second temperature difference is greater than the second temperature preset value.
Preferably, the fault type includes that the heating loop is short, and the first execution module includes a fourth obtaining unit, a setting unit, a fifth obtaining unit, a matching unit and a first adjusting unit;
the setting unit is used for setting a corresponding relation table of the combustion duration interval and the shutdown waiting correction duration, and the corresponding relation table comprises a plurality of combustion duration intervals and different shutdown waiting correction durations corresponding to the combustion duration intervals;
the fifth acquiring unit is used for acquiring the last single combustion time length before the water heater stops heating;
the matching unit is used for matching the single combustion time length with the corresponding relation table to obtain a target shutdown waiting correction time length corresponding to the single combustion time length;
the fourth obtaining unit is used for obtaining the current shutdown waiting time of the water heater in the heating mode;
the first adjusting unit is used for adjusting the current shutdown waiting time of the water heater in the heating mode based on the target shutdown waiting correction time.
Preferably, the fault type includes bubble accumulation in the pipeline, and the first execution module further includes a second adjustment unit, a sixth acquisition unit and a trigger unit;
the second adjusting unit is used for adjusting the post-circulation time of the water pump;
the sixth acquisition unit is used for acquiring the shutdown times caused by the accumulation of bubbles in the pipeline in a first preset period;
and the triggering unit is used for triggering the auxiliary exhaust equipment to automatically exhaust if the shutdown times are judged to exceed the preset shutdown times.
Preferably, the fault type is water pump jamming, and the first execution module further comprises a control unit;
and the control unit is used for controlling the water heater to stop and outputting fault prompt information.
Preferably, the control system further comprises a first judging module, a second judging module, a detecting module and an adjusting module;
the first judgment module is used for judging whether the water heater is combusted for the first time, and if not, the second judgment module is called;
the second judging module is used for judging whether the current mode is a heating mode or not, and if so, the detecting module is called;
the detection module is used for detecting the running state of the water heater;
and the adjusting module is used for adjusting the operating frequency and the operating duration of the water heater in the heating mode according to the operating state.
Preferably, the second judging module is configured to, if it is judged that the current mode is the bathing mode, further include a fourth obtaining module and a control module;
the fourth obtaining module is used for obtaining the stop waiting time after the last bathing is finished;
and the control module is used for controlling the water heater to burn under the condition that the first outlet water temperature meets the combustion starting condition if the shutdown waiting time length is judged to reach a first preset time length.
Preferably, the second judging module is configured to, if it is judged that the current mode is the heating mode, further include a third judging module and a second executing module;
the third judging module is used for judging whether the current combustion time length in the heating mode is less than a second preset time length, and if so, the second executing module is called;
and the second execution module is used for executing the steps of acquiring the first outlet water temperature and the return water temperature when the water heater stops heating and acquiring the second outlet water temperature after the water pump is circulated.
A third aspect of the present invention provides a water heater, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the method for controlling start and stop of the water heater according to the first aspect.
A fourth aspect of the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method for controlling start and stop of a water heater according to the first aspect.
The positive progress effects of the invention are as follows:
the method comprises the steps of obtaining a fault type related to shutdown of the water heater based on the obtained first outlet water temperature and return water temperature when the water heater stops heating and the obtained second outlet water temperature after the water pump is circulated; different shutdown control operations are executed according to different fault types, the start and the stop of the water heater can be effectively controlled, the probability of frequent start and stop of the water heater is reduced, the service life of the water heater is prolonged, the noise of a machine is reduced, and the user experience is improved.
Drawings
Fig. 1 is a flowchart of a method for controlling start and stop of a water heater according to embodiment 1 of the present invention.
Fig. 2 is a flowchart of step 102 of a method for controlling starting and stopping of a water heater according to embodiment 2 of the present invention.
Fig. 3 is a first flowchart of step 103 of the method for controlling starting and stopping of a water heater according to embodiment 2 of the present invention.
Fig. 4 is a second flowchart of step 103 of the method for controlling starting and stopping of a water heater according to embodiment 2 of the present invention.
Fig. 5 is a flowchart of a method for controlling start and stop of a water heater according to embodiment 2 of the present invention.
Fig. 6 is a schematic block diagram of a start-stop control system for a water heater according to embodiment 3 of the present invention.
Fig. 7 is a schematic block diagram of a control system for starting and stopping a water heater according to embodiment 4 of the present invention.
Fig. 8 is a schematic structural diagram of an electronic device for implementing a control method for starting and stopping a water heater in embodiment 5 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the control method for starting and stopping the water heater provided in this embodiment includes:
in this embodiment, after the water heater stops heating (i.e., the water heater stops burning), the water pump may cycle later for a period of time, and at this time, a first outlet water temperature and a return water temperature when the water heater stops heating and a second outlet water temperature after the water pump cycle is finished are obtained.
102, obtaining a fault type of the water heater based on the first outlet water temperature, the return water temperature and the second outlet water temperature, wherein the fault type is a fault type related to shutdown of the water heater;
103, executing corresponding shutdown control operation according to the fault type;
wherein the shutdown control operation comprises at least one of adjusting a shutdown wait time, adjusting a post-pump cycle time, and controlling the water heater to shutdown.
The method includes the steps that a fault type related to shutdown of the water heater is obtained based on a first water outlet temperature and a return water temperature obtained when the water heater stops heating and a second water outlet temperature obtained after circulation of the water pump is finished; different shutdown control operations are executed according to different fault types, shutdown of the water heater can be effectively controlled, the probability of frequent shutdown of the water heater is reduced, the service life of the water heater is prolonged, noise of a machine is reduced, and user experience is improved.
Example 2
As shown in fig. 2, the method for controlling starting and stopping of a water heater in this embodiment is a further improvement of embodiment 1, and specifically:
step 102 comprises:
in this embodiment, the set temperature is set according to actual conditions, and is not specifically limited herein.
and step 1023, obtaining the fault type of the water heater according to the first temperature difference value and the second temperature difference value.
The fault type triggering the water heater to stop can be accurately judged based on the first temperature difference value and the second temperature difference value, so that different stop control operations can be executed according to different fault types, and the fault processing efficiency is improved.
In an embodiment, the fault type includes at least one of a short heating circuit, a bubble accumulation in the pipe, and a water pump jam.
if the first temperature difference value is smaller than the first temperature preset value and the second temperature difference value is smaller than the second temperature preset value, determining that the fault type is that the heating loop is short;
in the specific implementation process, for example, a first temperature difference value is set as a, a second temperature difference value is set as b, and a first temperature preset value is set as a 0 The second preset temperature value is b 0 ；
When a is less than or equal to a 0 And b is less than or equal to b 0 And if so, determining that the fault type is that the heating loop is short, namely determining that the heating loop is triggered to stop due to the short heating loop.
It should be noted that, when the heating loops of some rooms are manually closed, or when the corresponding loops are closed after the temperature of some rooms reaches a set value, the length of the heating loop is correspondingly shortened, and the actual heat consumption at the user side is reduced. If the water heater works under the condition, after heating and combustion are started, the return water temperature rises faster, and combustion is stopped after the shutdown temperature is reached in a short time.
In the embodiment, when the heating loop is short and causes shutdown, water in the heating pipeline tends to be uniform at the moment, the return water temperature is close to the first outlet water temperature, and in the shutdown condition, the first temperature difference is small and the second temperature difference after the water pump is circulated later is also small.
If the first temperature difference value is larger than a first temperature preset value, determining that the fault type is the accumulation of air bubbles in the pipeline;
when a > a 0 And when the fault type is determined to be bubble accumulation in the pipeline, namely, the shutdown triggered by the bubble accumulation in the pipeline can be determined.
It should be noted that there are bubbles in the heating pipeline, especially, there are many bubbles in the pipeline at the initial stage of heating, and as the temperature in the pipeline rises, more bubbles are precipitated, and if the bubbles are accumulated, the water passing through the heat exchanger may be heated to a higher temperature, and then the heating pipeline may be stopped because the temperature of the first outlet water reaches the set value or the temperature is too high.
In this embodiment, when bubbles in the pipeline are gathered at the heat exchanger in the water heater, the water at the heat exchanger is less, and the heating load of the water heater is not changed, which may cause the first outlet water temperature to reach the shutdown condition and stop. However, the water heater is shut down due to the fact that the temperature of a section of loop in the water heater is too high caused by the accumulation of bubbles in the pipeline, the water temperature of a heating water channel is not uniform when the water heater is actually shut down, and the temperature difference between the inlet water temperature and the first outlet water temperature is large.
And if the first temperature difference is smaller than the first temperature preset value and the second temperature difference is larger than the second temperature preset value, determining that the fault type is water pump clamping stagnation.
When a is less than or equal to a 0 And b > b 0 And if so, determining that the fault type is water pump jamming, namely determining that the machine is stopped due to the water pump jamming.
Specifically, once the water pump is blocked and stops rotating, the water pump does not rotate, water in the water heater does not flow and the water heater burns, the water in the water heater can be heated to the shutdown temperature to cause shutdown, and because a heating loop generally does not have a flow sensor (because more impurities in a heating pipeline can be blocked), a water pump blocking lagging system cannot timely make fault judgment, the water heater can continue to burn after the temperature drops, and then the water heater is damaged or even potential safety hazards are brought. Under the condition, the first outlet water temperature and the return water temperature are both high, the water pump does not rotate in the process of the back circulation of the water pump, and the heat in the heat exchanger continues to heat part of the static heating water in the water heater, so that the second outlet water temperature is further increased, and the water heater is triggered to stop.
In an implementation scenario where the fault type includes a shorter heating circuit, as shown in fig. 3, step 103 includes:
1031, setting a corresponding relation table of the combustion duration intervals and the shutdown waiting correction durations, wherein the corresponding relation table comprises a plurality of combustion duration intervals and different shutdown waiting correction durations corresponding to each combustion duration interval;
in this embodiment, each combustion duration interval may be adjusted according to actual requirements, and the shutdown waiting correction duration is set and adjusted according to actual conditions, which is not specifically limited herein.
in this embodiment, the duration of single combustion falls into different combustion duration intervals, and then the duration of corresponding different shutdown wait corrections, the shorter the duration of single combustion, the longer the duration of corresponding shutdown wait corrections.
in this embodiment, the waiting time for the current shutdown of the water heater in the heating mode is the minimum time difference between the last combustion stop and the next ignition combustion start on the premise that the temperature condition is met. It should be noted that, in the heating mode, the water heater is always in the on state, and there are a combustion operating state and a non-combustion waiting state.
And 1035, adjusting the current shutdown waiting time length of the water heater in the heating mode based on the target shutdown waiting correction time length.
In the embodiment, whether combustion is started or not is judged after the target shutdown waiting correction time length is delayed on the basis of the current shutdown waiting time length of the water heater in the heating mode.
For example, the single combustion period is t, and the correspondence table includes four combustion period sections, each of which is (0, t) 1 )，[t 1 ，t 2 )，[t 2 ，t 3 )，[t 3 , + ∞), where 0 < t 1 ＜t 2 ＜t 3 ，t 1 Is 1min, t 2 Is 3min, t 3 Is 5min, if the set current shutdown waiting time in the current heating mode is 2min, the combustion time interval (0, t) 1 ) The corresponding time length of the shutdown waiting correction is 15min, and the combustion time length interval [ t 1 ，t 2 ) The corresponding time length of the shutdown waiting correction is 10min, and the combustion time length interval [ t 2 ，t 3 ) The corresponding time length of the shutdown waiting correction is 5min, and the combustion time length interval [ t 3 And + ∞) the corresponding time length of the stop waiting correction is 0min;
when t falls within the combustion period interval (0, t) 1 ) Inner, specifically, t < t 1 If so, namely t is less than 1min, delaying for 15min on the basis of the set current shutdown waiting time of 2min in the current heating mode;
when t falls within the combustion duration interval t 1 ，t 2 ) Inner, specifically, t 1 ≤t＜t 2 If so, namely t is more than or equal to 1min and less than 3min, delaying for 10min on the basis of the set current shutdown waiting time of 2min in the current heating mode;
when t falls within the combustion duration interval t 2 ，t 3 ) Inner, specifically, t 2 ≤t≤t 3 If so, namely t is more than or equal to 3min and less than 5min, delaying for 5min on the basis of the set current shutdown waiting time of 2min in the current heating mode;
when t falls into the combustion duration interval [ t ] 3 Within + ∞), in particular t > t 3 When t is more than 5min, the current stop set in the current heating mode is carried outAnd delaying for 0min on the basis of the machine waiting time of 2min, namely when t is greater than 5min, not delaying the waiting time of the previous shutdown, and judging whether to start combustion after 2 min.
The frequency of frequent starting and stopping is reduced by delaying the current shutdown waiting time of the water heater in the heating mode, and the service life of the water heater is prolonged.
In one embodiment, the type of fault includes bubble accumulation in the pipeline, as shown in fig. 4, step 103 includes:
10311, adjusting the cycle time length after the water pump;
in this embodiment, the length of time that the circulation after extension water pump can help the system exhaust, and the water pump stall back, next normal start. For example, extending the length of the post-cycle of the water pump may adjust the length of time the system is vented.
10312, obtaining shutdown times caused by bubble aggregation in the pipeline in a first preset period;
and step 10313, if the number of times of shutdown is judged to exceed the preset number of times of shutdown, triggering the auxiliary exhaust equipment to automatically exhaust.
In this embodiment, count the number of times that causes the shut down by the bubble gathering in the pipeline in the first preset period, if judge that the number of times of shutting down exceeds preset shut down number of times, then think the bubble is too much in the water route, only rely on the water pump in the system after the circulation can't arrange the bubble completely, and can lead to heating system internal pressure to reduce because the bubble discharges (the water pressure has the allowed range in the heating system), then trigger the automatic exhaust of supplementary exhaust apparatus this moment to arrange the bubble in the system totally.
It should be noted that the first preset period and the preset shutdown number are both set according to actual situations, for example, the first preset period may be set to 24h, the preset shutdown number may be set to 2, and the first preset period and the preset shutdown number may also be set to other values, which is not specifically limited herein.
In one embodiment, the fault type includes pump seizure, and step 103 includes:
and controlling the water heater to stop and outputting fault prompt information.
In this embodiment, when the water pump jamming, control water heater shut down and no longer start, output trouble prompt message to the suggestion user in time maintains.
In an implementation scenario, as shown in fig. 5, the control method further includes:
step 201, judging whether the water heater is burnt for the first time (namely, the first burning after the power plug is powered off and restarted), if not, executing step 202, and if so, executing step 206;
in this embodiment, if the first combustion is performed in the heating mode, the combustion can be performed within the water pump cycle time period by reaching the starting temperature difference without waiting for direct circulation before entering the water pump.
and 205, adjusting the running frequency and the running time of the water heater in the heating mode according to the running state. It should be noted that the aforementioned shutdown waiting time is the shutdown time between any two operations, and in the heating mode, different operation states correspond to different operation frequencies (times) and the time of each operation.
In the embodiment, when the combustion time in the heating mode is judged to be not less than the second preset time, after the water pump is circulated, the third preset time is operated in a second preset period, whether the first outlet water temperature meets the combustion starting condition is judged, and if yes, the water heater is controlled to combust and the combustion time is recorded; if not, operating again within the second preset period for a third preset time, and repeating the operation.
It should be noted that the second preset period and the third preset time period are both set according to actual situations, and are not specifically limited here.
Step 206, judging whether the first outlet water temperature meets a combustion starting condition, if so, executing step 207, otherwise, executing step 208;
step 210 specifically includes, if it is determined that the shutdown waiting time period reaches a first preset time period, controlling the water heater to burn when the first effluent temperature meets the combustion starting condition; and if the shutdown waiting time does not reach the first preset time, continuing to wait until the shutdown waiting time reaches the first preset time and controlling the water heater to burn under the condition that the first water outlet temperature meets the combustion starting condition.
After the water heater is fired and sintered, the water heater is added into a water pump and then circulates to eliminate local high temperature in a pipeline so as to enable the temperature in the pipeline to be uniform, and the water heater is circulated for a preset time period at intervals before heating does not reach a combustion starting condition, so that the situation that the water heater is not started due to large temperature difference between a user side and a water heater side (namely a machine side) is avoided.
In this embodiment, if it is determined that the current mode is the bathing mode, the pre-heating cycle may be entered at an interval of a first preset duration after the last bathing.
This embodiment is long through the adjustment shutdown wait according to the fault type of difference on the one hand, the length is long when the adjustment water pump after-circulation or control water heater shut down and reduce the number of times that the water heater frequently opens and stops, on the other hand makes the temperature in the heating pipeline more even through add circulation before the water pump and circulation behind the water pump, so that shut down and start condition judgement more accurate, can the effectual start-stop of control water heater, the probability that the water heater frequently opens and stops has been reduced, the life of water heater has been prolonged, machine noise has been reduced, user experience has been promoted.
Example 3
As shown in fig. 6, the control system for starting and stopping the water heater provided by this embodiment includes a first obtaining module 1, a second obtaining module 2, and a first executing module 3;
the first acquisition module 1 is used for acquiring a first outlet water temperature and a return water temperature when the water heater stops heating and a second outlet water temperature after the water pump rear circulation is finished;
in this embodiment, after the water heater stops heating (i.e., the water heater stops burning), the water pump may cycle later for a period of time, and at this time, a first outlet water temperature and a return water temperature when the water heater stops heating, and a second outlet water temperature after the water pump finishes cycling are obtained.
The second obtaining module 2 is used for obtaining the fault type of the water heater based on the first water outlet temperature, the return water temperature and the second water outlet temperature, wherein the fault type is a fault type related to shutdown of the water heater;
the first execution module 3 is used for executing corresponding shutdown control operation according to the fault type;
wherein the shutdown control operation comprises at least one of adjusting a shutdown wait time, adjusting a post-pump cycle time, and controlling the water heater to shutdown.
In the embodiment, based on the acquired first outlet water temperature and return water temperature when the water heater stops heating and the acquired second outlet water temperature after the water pump is circulated, the fault type related to the shutdown of the water heater is obtained; different shutdown control operations are executed according to different fault types, shutdown of the water heater can be effectively controlled, the probability of frequent shutdown of the water heater is reduced, the service life of the water heater is prolonged, machine noise is reduced, and user experience is improved.
Example 4
As shown in fig. 7, the control system for starting and stopping the water heater of the present embodiment is a further improvement of embodiment 3, specifically: the second obtaining module 2 comprises a first obtaining unit 21, a second obtaining unit 22 and a third obtaining unit 23;
a first obtaining unit 21, configured to obtain a set temperature of the water heater;
in this embodiment, the set temperature is set according to actual conditions, and is not specifically limited herein.
The second obtaining unit 22 is configured to obtain a first temperature difference between a first outlet water temperature and a return water temperature when the water heater stops heating, and a second temperature difference between a second outlet water temperature after the water pump post-circulation is finished and a set temperature of the water heater;
and the third obtaining unit 23 is configured to obtain the fault type of the water heater according to the first temperature difference and the second temperature difference.
According to the embodiment, the fault type triggering the water heater to be stopped can be accurately judged based on the first temperature difference value and the second temperature difference value, so that different stop control operations can be executed according to different fault types, and the fault processing efficiency is improved.
In an embodiment, the fault type includes at least one of a short heating circuit, a bubble accumulation in the pipe, and a water pump jam.
As shown in fig. 7, the third acquisition unit 23 includes a first determination subunit 231, a second determination subunit 232, and a third determination subunit 233;
a first determining subunit 231, configured to determine that the fault type is that the heating loop is short if the first temperature difference is smaller than the first temperature preset value and the second temperature difference is smaller than the second temperature preset value;
in the specific implementation process, for example, a first temperature difference value is set as a, a second temperature difference value is set as b, and a first temperature preset value is set as a 0 The second preset temperature value is b 0 ；
When a is less than or equal to a 0 And b is less than or equal to b 0 And if so, determining that the fault type is that the heating loop is short, namely determining that the heating loop is triggered to stop due to the short heating loop.
It should be noted that, when the heating loops of some rooms are manually closed, or when the corresponding loops are closed after the temperature of some rooms reaches a set value, the length of the heating loop is correspondingly shortened, and the actual heat consumption at the user side is reduced. If the water heater works under the condition, after heating and combustion are started, the return water temperature rises faster, and combustion is stopped after the shutdown temperature is reached in a short time.
In the embodiment, when the heating loop is short and causes shutdown, water in the heating pipeline tends to be uniform at the moment, the return water temperature is close to the first outlet water temperature, and in the shutdown condition, the first temperature difference is small and the second temperature difference after the water pump is circulated later is also small.
A second determining subunit 232, configured to determine that the fault type is air bubble aggregation in the pipeline if the first temperature difference is greater than the first temperature preset value;
when a > a 0 And when the fault type is determined to be bubble accumulation in the pipeline, namely, the shutdown triggered by the bubble accumulation in the pipeline can be determined.
It should be noted that there are bubbles in the heating pipeline, especially, there are many bubbles in the pipeline at the initial stage of heating, and as the temperature in the pipeline rises, more bubbles will be precipitated, and if the bubbles are collected, the water passing through the heat exchanger may be heated to a higher temperature, and then the heating may be stopped because the first outlet water temperature reaches the set value or the temperature is too high.
In this embodiment, when bubbles in the pipeline are gathered at the heat exchanger in the water heater, the water at the heat exchanger is less, and the heating load of the water heater is not changed, which may cause the first outlet water temperature to reach the shutdown condition and stop. However, the water heater is shut down due to the fact that the temperature of a section of loop in the water heater is too high caused by the accumulation of bubbles in the pipeline, the water temperature of a heating water channel is not uniform when the water heater is actually shut down, and the temperature difference between the inlet water temperature and the first outlet water temperature is large.
And a third determining subunit 233, configured to determine that the fault type is water pump sticking if the first temperature difference is smaller than the first temperature preset value and the second temperature difference is greater than the second temperature preset value.
When a is less than or equal to a 0 And b > b 0 And if so, determining that the fault type is water pump jamming, namely determining that the machine is stopped due to the water pump jamming.
Specifically, once the water pump is stuck and stalled, the water pump does not rotate, water in the water heater does not flow and the water heater burns, the water in the water heater can be heated to the shutdown temperature to cause shutdown, and because there is generally no flow sensor in the heating loop (because heating pipeline impurities are more and can be stuck), the water pump stuck lagging system can not make fault judgment in time, the water heater can continue to burn after the temperature drops, and then the water heater is damaged or even potential safety hazards are brought. Under the condition, the first outlet water temperature and the return water temperature are both high, the water pump does not rotate in the process of the back circulation of the water pump, and the heat in the heat exchanger continues to heat part of the static heating water in the water heater, so that the second outlet water temperature is further increased, and the water heater is triggered to stop.
In an implementation scheme, the fault type includes that the heating loop is short, as shown in fig. 7, the first execution module 3 includes a fourth obtaining unit 311, a setting unit 312, a fifth obtaining unit 313, a matching unit 314, and a first adjusting unit 315;
a setting unit 312, configured to set a correspondence table between the combustion duration intervals and the shutdown wait correction durations, where the correspondence table includes a plurality of combustion duration intervals and different shutdown wait correction durations corresponding to each combustion duration interval;
in this embodiment, each combustion duration interval may be adjusted according to actual requirements, and the shutdown waiting correction duration is set and adjusted according to actual conditions, which is not specifically limited herein.
A fifth obtaining unit 313, configured to obtain a last single combustion time period before the water heater stops heating;
the matching unit 314 is configured to match the single combustion duration with the corresponding relationship table to obtain a target shutdown waiting correction duration corresponding to the single combustion duration;
in this embodiment, the duration of single combustion falls into the interval of different combustion durations, and then the duration of corresponding different machine halt wait corrections, the shorter the duration of single combustion, the longer the duration of corresponding machine halt wait corrections.
A fourth obtaining unit 311, configured to obtain the current shutdown waiting time of the water heater in the heating mode;
in this embodiment, the waiting time for the current shutdown of the water heater in the heating mode is the minimum time difference between the last combustion stop and the next ignition combustion start on the premise that the temperature condition is met. It should be noted that, in the heating mode, the water heater is always in the on state, and there are a combustion operating state and a non-combustion waiting state.
And a first adjusting unit 315, configured to adjust the current shutdown waiting duration of the water heater in the heating mode based on the target shutdown waiting correction duration.
In the embodiment, whether combustion is started or not is judged after the target shutdown waiting correction time length is delayed on the basis of the current shutdown waiting time length of the water heater in the heating mode.
For example, the single combustion period is t, and the correspondence table includes four combustion period sections, each of which is (0, t) 1 )，[t 1 ，t 2 )，[t 2 ，t 3 )，[t 3 , + ∞), where 0 < t 1 ＜t 2 ＜t 3 ，t 1 Is 1min, t 2 Is 3min, t 3 Is 5min, if the set current shutdown waiting time in the current heating mode is 2min, the combustion time interval (0, t) 1 ) The corresponding time length of the shutdown waiting correction is 15min, and the combustion time length interval [ t ] 1 ，t 2 ) The corresponding time length of the shutdown waiting correction is 10min, and the combustion time length interval [ t 2 ，t 3 ) The corresponding time length of the shutdown waiting correction is 5min, and the combustion time length interval [ t 3 And + ∞) the time length of the shutdown waiting correction is 0min;
when t falls within the combustion duration interval (0, t) 1 ) Inner, specifically, t < t 1 If the time is longer than the preset time t, namely t is less than 1min, delaying for 15min on the basis of the set current shutdown waiting time length of 2min in the current heating mode;
when t falls into the combustion duration interval [ t ] 1 ，t 2 ) Inner, specifically, t 1 ≤t＜t 2 If the time is longer than or equal to 1min and shorter than 3min, delaying for 10min on the basis of the set current shutdown waiting time length of 2min in the current heating mode;
when t falls within the combustion duration interval t 2 ，t 3 ) Inner, specifically, t 2 ≤t≤t 3 If the time is longer than or equal to 3min and shorter than 5min, delaying for 5min on the basis of the set current shutdown waiting time length of 2min in the current heating mode;
when t falls into the combustion duration interval [ t ] 3 Within + ∞), in particular t > t 3 And if so, namely t is greater than 5min, delaying for 0min on the basis of the set current shutdown waiting time length of 2min in the current heating mode, namely when t is greater than 5min, not delaying the current shutdown waiting time length, but judging whether to start combustion after 2 min.
The frequency of frequent starting and stopping is reduced by delaying the current shutdown waiting time of the water heater in the heating mode, and the service life of the water heater is prolonged.
In an implementable scenario, the failure type includes bubble accumulation in the pipeline, as shown in fig. 7, the first execution module 3 further includes a second adjusting unit 316, a sixth acquiring unit 317 and a triggering unit 318;
a second adjusting unit 316, configured to adjust a post-cycle duration of the water pump;
in this embodiment, the length of time that the extension water pump back-loop was circulated can help the system exhaust, and the water pump stall back, next normal start. For example, extending the length of the post-cycle of the water pump may adjust the length of time the system is vented.
A sixth obtaining unit 317, configured to obtain the number of times of shutdown caused by bubble aggregation in the pipeline in the first preset period;
and a triggering unit 318, configured to trigger the auxiliary exhaust device to automatically exhaust if it is determined that the shutdown frequency exceeds the preset shutdown frequency.
In this embodiment, count the number of times that causes the shut down by the bubble gathering in the pipeline in the first preset period, if judge that the number of times of shutting down exceeds preset shut down number of times, then think the bubble is too much in the water route, only rely on the water pump in the system after the circulation can't arrange the bubble completely, and can lead to heating system internal pressure to reduce because the bubble discharges (the water pressure has the allowed range in the heating system), then trigger the automatic exhaust of supplementary exhaust apparatus this moment to arrange the bubble in the system totally.
It should be noted that the first preset period and the preset shutdown number are both set according to actual situations, for example, the first preset period may be set to 24h, the preset shutdown number may be set to 2, and the first preset period and the preset shutdown number may also be set to other values, which is not specifically limited herein.
In an implementable solution, the fault type includes water pump seizure, as shown in fig. 7, the first execution module 3 further includes a control unit 319;
and the control unit 319 is used for controlling the water heater to stop and outputting fault prompt information.
In this embodiment, when the water pump jamming, control water heater shut down and no longer start, output trouble prompt message to the suggestion user in time maintains.
In an implementable solution, as shown in fig. 7, the control system further includes a first determining module 4, a second determining module 5, a detecting module 6, an adjusting module 7, a fourth obtaining module 8, a control module 9, a third determining module 10, and a second executing module 11;
the first judgment module 4 is used for judging whether the water heater is in first combustion (namely the first combustion after the power plug is powered off and restarted), if not, the second judgment module 5 is called, and if so, the adjustment module 7 is called;
the second judging module 5 is used for judging whether the current mode is a heating mode, if so, the detecting module 6 is called, and if not, the fourth obtaining module 8 is called;
the detection module 6 is used for detecting the running state of the water heater;
and the adjusting module 7 is used for adjusting the operating frequency and the operating duration of the water heater in the heating mode according to the operating state. It should be noted that the aforementioned shutdown waiting time duration is the shutdown time between any two operations, and in the heating mode, different operation states correspond to different operation frequencies (times) and the time of each operation.
In the embodiment, when the combustion time in the heating mode is judged to be not less than the second preset time, after the water pump is cycled, the water pump is operated for a third preset time within a second preset period, whether the first outlet water temperature meets the combustion starting condition is judged, and if yes, the water heater is controlled to combust and the combustion time is recorded; if not, operating again within the second preset period for a third preset time, and repeating the operation.
It should be noted that the second preset period and the third preset duration are both set according to actual situations, and are not specifically limited herein.
A fourth obtaining module 8, configured to obtain a shutdown waiting time after bathing is finished last time;
and the control module 9 is configured to control the water heater to combust if it is determined that the shutdown waiting time duration reaches a first preset time duration and the first effluent temperature meets the combustion starting condition.
The control module 9 is specifically configured to, if it is determined that the shutdown waiting time period reaches a first preset time period, control the water heater to combust if the first effluent temperature meets a combustion starting condition; and if the shutdown waiting time does not reach the first preset time, continuing to wait until the shutdown waiting time reaches the first preset time and controlling the water heater to burn under the condition that the first water outlet temperature meets the combustion starting condition.
After the water heater is fired and sintered, the water heater is added into a water pump and then circulates to eliminate local high temperature in a pipeline so as to enable the temperature in the pipeline to be uniform, and the water heater is circulated for a preset time period at intervals before heating does not reach a combustion starting condition, so that the situation that the water heater is not started due to large temperature difference between a user side and a water heater side (namely a machine side) is avoided.
In this embodiment, if it is determined that the current mode is the bathing mode, the pre-heating cycle may be entered after a first preset time interval since the last bathing.
The third judging module 10 is used for judging whether the current combustion time length in the heating mode is less than a second preset time length, if so, the second executing module 11 is called, and if not, the detecting module 6 is called;
in the embodiment, if the first combustion is in the heating mode, the water can be combusted by reaching the starting temperature difference within the water pump circulation time without directly waiting for the circulation before entering the water pump.
And the second execution module 11 is configured to execute the steps of obtaining the first outlet water temperature and the return water temperature when the water heater stops heating, and obtaining the second outlet water temperature after the water pump post-circulation is finished.
According to the embodiment, on the one hand, the time waiting for stopping is adjusted according to different fault types, the time for adjusting the water pump back circulation is long, or the water heater is controlled to stop to reduce the frequency of frequent starting and stopping of the water heater, on the other hand, the water temperature in a heating pipeline is more uniform by adding the water pump front circulation and the water pump back circulation, so that the stopping and starting condition judgment are more accurate, the starting and stopping of the water heater can be effectively controlled, the probability of frequent starting and stopping of the water heater is reduced, the service life of the water heater is prolonged, the machine noise is reduced, and the user experience degree is improved.
Example 5
Fig. 8 is a schematic structural diagram of an electronic device according to embodiment 5 of the present invention. The electronic device is a water heater, the water heater includes a memory, a processor (e.g., a master control module), and a computer program stored in the memory and running on the processor, and the start-stop control method of the water heater according to embodiment 1 or 2 is implemented when the processor executes the program. The electronic device 30 shown in fig. 8 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in fig. 8, the electronic device 30 may be embodied in the form of a general purpose computing device, which may be, for example, a server device. The components of the electronic device 30 may include, but are not limited to: the at least one processor 31, the at least one memory 32, and a bus 33 connecting the various system components (including the memory 32 and the processor 31).
The bus 33 includes a data bus, an address bus, and a control bus.
The memory 32 may include volatile memory, such as Random Access Memory (RAM) 321 and/or cache memory 322, and may further include Read Only Memory (ROM) 323.
The processor 31 executes various functional applications and data processing, such as the control method of starting and stopping the water heater according to embodiment 1 or 2 of the present invention, by running the computer program stored in the memory 32.
The electronic device 30 may also communicate with one or more external devices 34 (e.g., a keyboard, a pointing device, etc.). Such communication may be through input/output (I/O) interfaces 35. Also, model-generating device 30 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via network adapter 36. As shown in FIG. 8, network adapter 36 communicates with the other modules of model-generating device 30 via bus 33. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generating device 30, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functions of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Example 6
The present embodiment provides a computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing the control method of starting and stopping a water heater of embodiment 1 or 2.
More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible embodiment, the invention can also be implemented in the form of a program product comprising program code for causing a terminal device to execute a control method for starting and stopping a water heater according to embodiment 1 or 2 when the program product is run on the terminal device.
Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (9)
1. A control method for starting and stopping a water heater is characterized by comprising the following steps:
acquiring a first outlet water temperature and a return water temperature when the water heater stops heating and a second outlet water temperature after the water pump rear circulation is finished;
obtaining a fault type of the water heater based on the first water outlet temperature, the return water temperature and the second water outlet temperature, wherein the fault type is a fault type related to shutdown of the water heater;
executing corresponding shutdown control operation according to the fault type;
wherein the shutdown control operation comprises at least one of adjusting a shutdown wait time, adjusting a post-pump cycle time, and controlling the water heater to shutdown;
the step of obtaining the fault type of the water heater based on the first water outlet temperature, the return water temperature and the second water outlet temperature comprises the following steps:
acquiring the set temperature of the water heater;
acquiring a first temperature difference value between a first outlet water temperature and a return water temperature when the water heater stops heating, and a second temperature difference value between a second outlet water temperature after the water pump rear circulation is finished and the set temperature of the water heater;
obtaining the fault type of the water heater according to the first temperature difference value and the second temperature difference value;
the fault type comprises at least one of short heating loop, air bubble accumulation in the pipeline and water pump clamping stagnation, and the step of obtaining the fault type of the water heater according to the first temperature difference and the second temperature difference comprises the following steps:
if the first temperature difference value is smaller than a first temperature preset value and the second temperature difference value is smaller than a second temperature preset value, determining that the fault type is that a heating loop is short;
if the first temperature difference value is larger than the first temperature preset value, determining that the fault type is bubble accumulation in the pipeline;
and if the first temperature difference value is smaller than the first temperature preset value and the second temperature difference value is larger than the second temperature preset value, determining that the fault type is water pump clamping stagnation.
2. The method for controlling starting and stopping of the water heater according to claim 1, wherein the fault type comprises a short heating loop, and the step of executing the corresponding stop control operation according to the fault type comprises the following steps:
setting a corresponding relation table of a combustion duration interval and a shutdown waiting correction duration, wherein the corresponding relation table comprises a plurality of combustion duration intervals and different shutdown waiting correction durations corresponding to the combustion duration intervals;
acquiring the last single combustion time length before the water heater stops heating;
matching the single combustion time length with the corresponding relation table to obtain a target shutdown waiting correction time length corresponding to the single combustion time length;
acquiring the current shutdown waiting time of the water heater in a heating mode;
and adjusting the current shutdown waiting time of the water heater in the heating mode based on the target shutdown waiting correction time.
3. The method for controlling start and stop of a water heater according to claim 1, wherein the fault type comprises bubble accumulation in a pipeline, and the step of executing the corresponding stop control operation according to the fault type comprises the following steps:
adjusting the post-circulation time of the water pump;
obtaining the shutdown times caused by the accumulation of bubbles in the pipeline in a first preset period;
and if the number of times of shutdown exceeds the preset number of times of shutdown, triggering the auxiliary exhaust equipment to automatically exhaust.
4. The method for controlling starting and stopping of the water heater according to claim 1, wherein the fault type is water pump stagnation, and the step of executing the corresponding stop control operation according to the fault type comprises the following steps:
and controlling the water heater to stop and outputting fault prompt information.
5. The method for controlling starting and stopping of the water heater according to claim 1, further comprising the following steps:
judging whether the water heater is combusted for the first time, if not, judging whether the current mode is a heating mode, and if so, detecting the running state of the water heater; and adjusting the running frequency and the running time of the water heater in the heating mode according to the running state.
6. The method for controlling the start and stop of the water heater according to claim 5, wherein if the current mode is determined to be the bathing mode, the method further comprises the following steps:
obtaining the stop waiting time after the last bath is finished;
and if the shutdown waiting time length is judged to reach a first preset time length, controlling the water heater to burn under the condition that the first water outlet temperature meets the combustion starting condition.
7. The method for controlling starting and stopping of the water heater according to claim 5, wherein if the current mode is judged to be the heating mode, the method further comprises the following steps:
and judging whether the current combustion time length in the heating mode is less than a second preset time length, if so, executing the step of acquiring a first water outlet temperature and a return water temperature when the water heater stops heating and a second water outlet temperature after the water pump rear circulation is finished.
8. A water heater comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for controlling start and stop of the water heater according to any one of claims 1-7 when executing the computer program.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method for controlling the start and stop of a water heater according to any one of claims 1 to 7.
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