CN111238049B - Water heater and control method, device, equipment, storage medium and processor thereof - Google Patents
Water heater and control method, device, equipment, storage medium and processor thereof Download PDFInfo
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- CN111238049B CN111238049B CN202010036924.2A CN202010036924A CN111238049B CN 111238049 B CN111238049 B CN 111238049B CN 202010036924 A CN202010036924 A CN 202010036924A CN 111238049 B CN111238049 B CN 111238049B
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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
Abstract
The invention relates to a water heater and a control method, a control device, equipment, a storage medium and a processor thereof, wherein the method comprises the steps of acquiring exhaust information of a heat pump unit in the water heater; if the fact that the hot water demand of a user is larger than the preset water consumption is detected, determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limiting condition; the water heater is controlled to heat water in the water heater to a target water temperature under the limit heating frequency of the heat pump unit, the heat pump unit is controlled to execute expected shutdown, and the heating mode is automatically adjusted to improve the heating rate when the hot water demand of a user is large, so that the water in the water heater is rapidly heated. By adopting the technical scheme of the invention, the timeliness of hot water supply can be ensured.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a water heater and a control method, a control device, control equipment, a storage medium and a processor thereof.
Background
At present, hot water used in life of people can be obtained by heating cold water by a water heater.
Under the general condition, when the water heater got into normal operating condition, in order to reach purposes such as low noise, low energy consumption, heat pump set often can restrict the frequency operation than low, nevertheless can not move like this always, and in the use hot water process, along with hydrothermal outflow, the benefit of cold water, heat pump set probably can not in time heat the water of water heater to higher temperature to the temperature that leads to the outflow water is lower, causes the hot water supply volume of water heater not enough.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a water heater, a control method, a control device, a storage medium, and a processor thereof, so as to solve the problem that when a user demands a large amount of hot water, the water heater is prone to have insufficient hot water supply.
In order to achieve the above object, the present invention provides a control method of a water heater, comprising:
acquiring exhaust information of a heat pump unit in the water heater;
if the fact that the hot water demand of a user is larger than the preset water consumption is detected, determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limiting condition;
and controlling the water heater to heat water in the water heater to a target water temperature under the limit heating frequency of the heat pump unit, and controlling the heat pump unit to execute expected shutdown.
Further, in the method, the preset safety limit condition includes a safe operation condition;
the method for determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limiting condition comprises the following steps:
and if the exhaust information of the heat pump unit meets the safe operation condition, determining the maximum operation frequency of the heat pump unit as the limit heating frequency.
Further, in the above method, the preset safety limit condition further includes a safety start condition;
the method for determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limiting condition comprises the following steps:
if the exhaust information of the heat pump unit does not meet the safe operation condition but the exhaust information of the heat pump unit meets the safe starting condition, determining the safe operation frequency of the heat pump unit as the limit heating frequency;
the safe operation frequency is the operation frequency of the heat pump unit when the exhaust information meets the safe operation condition in the process of reducing the frequency of the heat pump unit.
Further, in the method, the exhaust information of the heat pump unit includes an exhaust temperature of the heat pump unit and/or an exhaust pressure of the heat pump unit;
the safe starting condition comprises that the exhaust temperature is less than or equal to a preset temperature threshold value, and the exhaust pressure is less than or equal to a preset pressure threshold value;
the safe operation condition comprises that the difference value between the preset temperature threshold value and the exhaust temperature is smaller than or equal to a preset water temperature allowance, and the difference value between the preset pressure threshold value and the exhaust pressure is smaller than or equal to a preset pressure allowance.
Further, the method described above further includes:
and when the heat pump unit operates at the safe operation frequency, if the temperature of water in the water heater is not increased to the target water temperature within a first preset time, controlling the heat pump unit to increase from the safe operation frequency to the maximum operation frequency.
Further, the method described above further includes:
and if the exhaust information of the heat pump unit does not meet the safe starting condition, controlling the heat pump unit to execute abnormal shutdown.
Further, the method described above further includes:
if the number of times of executing the abnormal shutdown of the heat pump unit reaches a preset number of times, acquiring the current temperature of water in the water heater and the current ambient temperature of the water heater;
and updating the current temperature to the target water temperature, and updating the current environment temperature to a preset environment temperature associated with the target water temperature.
Further, in the method, after the controlling the heat pump unit to perform the abnormal shutdown, the method further includes:
recording the current heating frequency of the heat pump unit within a specified time before abnormal shutdown;
and restarting the heat pump unit based on the current heating frequency so as to judge whether the heat pump unit executes abnormal shutdown again.
Further, in the above method, before the obtaining of the exhaust information of the heat pump unit in the water heater, the method further includes:
determining the hot water demand of the user according to the water flow of the water heater within a second preset time; and/or
Determining the hot water demand of the user according to the water temperature change rate of the water heater within a third preset time; and/or
Determining the hot water demand of the user according to the received user operation instruction; and/or
And determining the hot water demand of the user according to the water using habit of the user corresponding to the current time.
Further, in the above method, if the water outlet of the water heater and/or the heat pump unit is provided with an electric heating device, the method further includes:
and if the fact that the hot water demand of the user is larger than the preset water consumption is detected, starting the electric heating device to heat the water in the water heater and/or the water flowing out of the water heater by using the electric heating device.
Further, the method described above further includes:
if the fact that the hot water demand of the user is smaller than or equal to the preset water consumption is detected, determining that the hot water demand of the user changes;
counting the duration of the change of the hot water demand of the user;
and if the duration reaches the preset duration, recovering to the initial operating frequency of the heat pump unit.
Further, in the above method, after determining the limit heating frequency of the heat pump unit, the method further includes:
starting the heat pump unit according to the limit heating frequency; alternatively, the first and second electrodes may be,
and increasing the frequency of the heat pump unit to the limit heating frequency according to a preset frequency increasing coefficient.
Further, in the above method, after controlling the water heater to heat water in the water heater to a target water temperature at a limit heating frequency of the heat pump unit, before controlling the heat pump unit to perform an expected shutdown, the method further includes:
and if the requirement of the hot water of the user is detected to be larger than the preset water consumption, setting the target temperature.
The present invention also provides a control device for a water heater, comprising:
the acquisition module is used for acquiring the exhaust information of the heat pump unit in the water heater;
the determining module is used for determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and a preset safety limiting condition if the fact that the hot water demand of a user is larger than the preset water consumption is detected;
and the control module is used for controlling the water heater to heat water in the water heater to a target water temperature under the limit heating frequency of the heat pump unit and then controlling the heat pump unit to execute expected shutdown.
The present invention also provides a control apparatus of a water heater, comprising: a processor and a memory;
the processor is connected with the memory:
the processor is used for calling and executing the program stored in the memory;
the memory is used for storing the program, and the program is at least used for executing the control method of the water heater.
The invention also provides a water heater, which is characterized in that the control device of the water heater is arranged.
The invention also provides a storage medium, which comprises a stored program, wherein the program executes the control method of the water heater.
The invention also provides a processor, which is used for running the program, wherein the program executes the control method of the water heater when running.
According to the water heater and the control method, device, equipment, storage medium and processor thereof, the exhaust information of the heat pump unit in the water heater is obtained, if the fact that the hot water demand of a user is larger than the preset water consumption is detected, the limit heating frequency of the heat pump unit is determined according to the exhaust information of the heat pump unit and the preset safety limiting condition, so that the water heater can be controlled to heat water in the water heater to the target water temperature under the limit heating frequency of the heat pump unit, the heat pump unit is controlled to execute expected shutdown, the automatic adjustment mode is realized when the hot water demand of the user is larger, the heating rate is improved, and the water in the water heater is rapidly heated. By adopting the technical scheme of the invention, the timeliness of hot water supply can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a first embodiment of a method for controlling a water heater according to the present invention;
FIG. 2 is a flow chart of a second embodiment of a control method of a water heater according to the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of a control device of a water heater according to the present invention;
fig. 4 is a schematic structural diagram of an embodiment of a control device of a water heater according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a flowchart of a first embodiment of a control method of a water heater according to the present invention, and as shown in fig. 1, the control method of the water heater of the present embodiment may specifically include the following steps:
100. acquiring exhaust information of a heat pump unit in a water heater;
in the embodiment, the exhaust information of the heat pump unit in the water heater can be acquired in real time. The exhaust information of the heat pump unit comprises the exhaust temperature of the heat pump unit and/or the exhaust pressure of the heat pump unit. For example, the exhaust temperature of the heat pump unit may be obtained by a temperature sensor, and the exhaust pressure of the heat pump unit may be obtained by a pressure sensor.
101. If the hot water demand of a user is detected to be larger than the preset water consumption, determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limiting condition;
in a specific implementation process, when a user uses hot water, the hot water demand of the user can be detected, predicted and the like, and the hot water demand of the user is compared with the preset water consumption, so that whether the user needs to use more hot water or not is determined. If the detected hot water demand of the user is larger than the preset water consumption, the user needs to use more hot water, otherwise, if the detected hot water demand of the user is smaller than or equal to the preset water consumption, the user does not need to use more hot water.
In practical application, in order to ensure that a user can use hot water in time and ensure that the temperature of the flowing hot water can always meet the requirements of the user under the condition of using the hot water for a long time, the factors such as power consumption, noise and the like can be omitted, and after the fact that the hot water requirement of the user is greater than the preset water consumption is detected, the limit heating frequency of the heat pump unit can be determined according to the exhaust information of the heat pump unit and the preset safety limiting condition, and the heat pump unit is started according to the limit heating frequency; or according to a preset frequency increasing coefficient, increasing the frequency of the heat pump unit to the limit heating frequency so that the water heater heats the water in the water heater under the limit heating frequency of the heat pump unit.
It should be noted that if the frequency of the heat pump unit is increased to the maximum heating frequency according to the preset frequency increase coefficient, the detection can be performed after the frequency of the heat pump unit is increased each time, so that the abnormal shutdown phenomenon of the heat pump unit caused by the determined reason that the maximum heating frequency of the heat pump unit is incorrect is reduced.
102. And controlling the water heater to heat water in the water heater to a target water temperature under the limit heating frequency of the heat pump unit, and controlling the heat pump unit to execute expected shutdown.
In this embodiment, after the limit heating frequency of the heat pump unit is determined, although hot water flows out and cold water is replenished, since the water heater heats water in the water heater at the limit heating frequency of the heat pump unit, the heating rate of the water heater is relatively high, the temperature of the water in the water heater is rapidly increased, the heating time is shortened, and after the water in the water heater is heated to a target water temperature, the heat pump unit is controlled to perform an expected shutdown, wherein the expected shutdown refers to a shutdown caused when the water in the water heater reaches the target water temperature and does not need to be heated any more.
According to the control method of the water heater, the exhaust information of the heat pump unit in the water heater is obtained, if the fact that the hot water demand of a user is larger than the preset water consumption is detected, the limit heating frequency of the heat pump unit is determined according to the exhaust information of the heat pump unit and the preset safety limiting condition, the water heater can be controlled to perform expected shutdown after water in the water heater is heated to the target water temperature under the limit heating frequency of the heat pump unit, the heating mode is automatically adjusted when the hot water demand of the user is large, the heating rate is improved, and therefore the water in the water heater is rapidly heated. By adopting the technical scheme of the invention, the timeliness of hot water supply can be ensured.
Typically, to conserve power, a lower target temperature is set for the water heater so that the water heater can reach the target temperature more quickly and then shut down. However, in order to ensure that the hot water is sufficiently supplied and the temperature of the required hot water is often high when the user uses a large amount of hot water, the process is complicated and the user experience is affected in the prior art, so that in the embodiment, if the hot water requirement of the user is detected to be larger than the preset water consumption, the target temperature can be automatically set, and the user is prevented from adjusting the target temperature. For example, the target temperature is typically 50 ℃, and when a large amount of water is required, the target temperature may be adjusted to 80 ℃. The adjusted temperature may be preset by the user, or may be set by the user according to the user's usage habit, and this embodiment is not particularly limited.
In a specific implementation process, when "determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limit condition" in step 101 is executed, the following steps may be performed:
in this embodiment, the preset safety limit condition includes a safe operation condition, that is, the heat pump unit can be normally started, and conditions such as high-pressure protection and high-temperature protection cannot occur in the operation process. At the moment, whether the exhaust information of the heat pump unit meets the safe operation condition can be judged; if the exhaust information of the heat pump unit is judged to meet the safe operation condition, the maximum operation frequency of the heat pump unit can be determined to be the limit heating frequency, and therefore the heat pump unit is in the maximum operation frequency, the heating rate can be increased to the maximum, and water in the water heater can be heated to the target water temperature at the maximum.
In practical application, the preset safety limiting conditions further include safety starting conditions, that is, the heat pump unit can be started normally, but conditions such as high pressure and high temperature protection may occur in the operation process, at this time, if it is determined that the exhaust information of the heat pump unit does not meet the safety operating conditions but meets the safety starting conditions, the safety operating frequency can be determined as the limit heating frequency, so that the heat pump unit can be operated normally, and water in the water heater is heated at a higher operating frequency. The safe operation frequency is the operation frequency of the heat pump unit when the exhaust information meets the safe operation condition in the process of reducing the frequency of the heat pump unit.
Specifically, the safe starting condition includes that the exhaust temperature is less than or equal to a preset temperature threshold value, and the exhaust pressure is less than or equal to a preset pressure threshold value. The safe operation condition comprises that the difference value between a preset temperature threshold value and the exhaust temperature is smaller than or equal to a preset water temperature allowance, and the difference value between a preset pressure threshold value and the exhaust pressure is smaller than or equal to a preset pressure allowance.
In practical application, when the heat pump unit operates at the safe operation frequency, along with the increase of the operation time, the exhaust information of the heat pump unit can meet the safe operation condition, at the moment, if the temperature of water in the water heater is not increased to the target water temperature within a first preset time, the heat pump unit can be controlled to be increased from the safe operation frequency to the maximum operation frequency, and the limit heating frequency of the heat pump unit is determined again according to the exhaust information of the heat pump unit and the preset safe limiting condition. Therefore, when the water in the water heater is heated, the frequency-up and frequency-down circulation heating is carried out, and the water in the water heater is heated fastest under the condition of ensuring the normal running state of the water heater.
In this embodiment, if it is detected that the exhaust information of the heat pump unit does not satisfy the safe starting condition, the heat pump unit is controlled to perform abnormal shutdown so as to protect the water heater. The abnormal shutdown refers to forced shutdown when the exhaust information of the heat pump unit does not meet the safe starting condition.
Further, in the above embodiment, after the heat pump unit is controlled to perform the abnormal shutdown, the number of times the heat pump unit performs the abnormal shutdown may be counted, the number of times the heat pump unit performs the abnormal shutdown is compared with a preset number of times, if the number of times the heat pump unit performs the abnormal shutdown reaches the preset number of times, the current temperature of the water in the water heater and the current ambient temperature of the water heater are obtained, the current temperature is updated to the target water temperature, and the current ambient temperature is updated to the preset ambient temperature associated with the target water temperature, so that the current temperature of the water in the water heater is used as the target water temperature at the current ambient temperature of the water heater.
Specifically, the preset number of times is preferably 3, and multiple shutdown of the heat pump unit indicates that abnormality is likely to occur in the heat pump unit under the limit heating frequency, and the current ambient temperature of the water heater may not heat the water in the water heater to the target water temperature, and at this time, the current temperature of the water in the water heater may be used as a value at which the heat pump unit can raise the temperature of the water in the heater to the maximum value.
In a specific implementation process, if the heat pump unit is controlled to execute abnormal shutdown, the current heating frequency of the heat pump unit in a specified time before the abnormal shutdown can be recorded; and restarting the heat pump unit based on the current heating frequency so as to judge whether the heat pump unit executes the abnormal shutdown again, thereby eliminating the abnormal shutdown caused by the judgment error.
Further, in the above embodiment, before "acquiring the exhaust information of the heat pump unit in the water heater" in step 100, the hot water demand of the user may be determined based on a preset rule, so as to compare the hot water demand of the user with the preset water consumption.
Specifically, the hot water demand of the user can be determined according to the water flow of the water heater within the second preset time. For example, the hot water demand of the user in a certain time period is calculated by detecting the flow at the water outlet or the water inlet of the water tank within 30 seconds continuously, and the hot water demand of the user is compared with the preset water consumption to obtain a comparison result. If the hot water demand of the user is more than the preset water consumption, the user needs to use a large amount of hot water, otherwise, if the hot water demand of the user is less than or equal to the preset water consumption, the user does not need to use a large amount of hot water.
In this embodiment, the hot water demand of the user may also be determined according to the water temperature change rate of the water heater in the third preset time. Specifically, the water tank of the water heater is generally lower-part make-up water, the temperature of water is collected at the lower part of the water tank, the water discharging speed is judged by judging the speed of the lower-part water temperature reduction, namely the water temperature change rate is higher, the water discharging speed is explained, the hot water demand of a user is greater than the preset water consumption, and the water consumption of the user is greater at the moment.
In this embodiment, the hot water demand of the user may also be determined according to the received user operation instruction. For example, a user may input a user's hot water demand via a controller of the water heater.
In this embodiment, the hot water demand of the user may also be determined according to the water usage habit of the user corresponding to the current time. Specifically, the requirements of different time periods for hot water may be different, so that the water consumption of the user in different historical time periods can be counted, the water consumption habit of the user corresponding to each time period can be obtained, and the hot water requirement of the user can be determined. For example, at 8 o 'clock, the user is used to take a bath, and the water consumption is higher at this time, so at 8 o' clock, if it is detected that the user uses hot water, the water consumption corresponding to the water consumption of the user in this time period can be used as the hot water demand of the user at this time.
It should be noted that, in this embodiment, the several manners of determining the hot water demand of the user may be implemented individually, or implemented in combination with each other, and when implemented in combination with each other, a corresponding weight value may be set for each manner, so as to accurately calculate the correct hot water demand of the user.
In a specific implementation process, if the hot water demand of the user is detected to be less than or equal to the preset water consumption, the change of the hot water demand of the user can be determined; at this time, the duration of the change of the hot water demand of the user can be counted; if the duration reaches the preset duration, the initial operating frequency of the heat pump unit is recovered so as to control the water heater in the power-saving mode. Wherein the preset time is preferably 2 min.
In practical applications, the water outlet of the water heater and/or the heat pump unit may further be provided with an electric heating device, and therefore, in this embodiment, if it is detected that the hot water demand of the user is greater than the preset water consumption, the electric heating device is started to heat the water in the water heater and/or the water flowing out of the water heater by using the electric heating device, so as to further shorten the heating time and improve the heating efficiency.
The technical scheme of the invention is explained by taking the exhaust information of the heat pump unit as an example, wherein the exhaust information comprises the exhaust temperature of the heat pump unit and the exhaust pressure of the heat pump unit:
fig. 2 is a flowchart of a second embodiment of the control method of the water heater of the present invention. As shown in fig. 2, the control method of the water heater of the present embodiment may specifically include the following steps:
200. detecting the water consumption of a user;
201. judging whether the user uses a large amount of water, if so, executing step 202, otherwise, returning to step 200;
202. opening a limit capacity increase mode;
203. the target temperature is increased; step 204, step 214 and step 216 are performed respectively;
under the normal condition, the target temperature of the water heater is low, so that the water heater can be stopped quickly, electric energy is saved, and if a large amount of water is used, the target temperature is automatically adjusted to increase the target temperature.
204. If the exhaust pressure is less than or equal to the preset pressure threshold and the exhaust temperature is less than or equal to the preset temperature threshold, if so, executing step 205, and if not, executing step 209;
205. raising the compressor frequency and raising the fan frequency;
206. if the target temperature is reached, step 215 and/or step 218 are executed, if not, step 205 and/or step 214 may be returned, and if not, step 208 and/or step 214 may be returned;
207. whether a preset pressure threshold value-safety margin is less than or equal to the exhaust pressure and less than or equal to a preset pressure threshold value and whether a preset temperature threshold value-safety margin is less than or equal to the exhaust temperature and less than or equal to a preset temperature threshold value is met or not; if yes, go to step 208, otherwise, go back to step 204;
in the process of increasing the frequency of the compressor and increasing the frequency of the fan, it is necessary to determine whether the discharge pressure is within a first preset safety threshold (preset pressure threshold-safety margin) and a safety operation pressure range of the preset pressure threshold, and whether the discharge temperature is within a second preset safety threshold (preset temperature threshold-safety margin) and a safety operation temperature range of the preset temperature threshold. Only within these two ranges, step 208 may be performed, and if not, step 204 may be returned to so that step 205 is performed when the exhaust pressure is less than the first preset safety threshold, the exhaust temperature is less than the second preset safety threshold, and step 209 is performed when the exhaust pressure is greater than the preset pressure threshold, and/or the exhaust temperature is greater than the preset temperature threshold.
208. Reducing fan frequency and reducing compressor frequency; performing step 206 and/or step 207;
when the frequency of the fan is reduced and the frequency of the compressor is reduced, whether the target temperature is reached or not can be judged, meanwhile, whether the exhaust pressure is less than or equal to a preset pressure threshold value-safety margin or not and whether the exhaust temperature is less than or equal to a preset temperature threshold value-safety margin or not are judged again until the exhaust pressure is less than or equal to the preset pressure threshold value-safety margin and the exhaust temperature is less than or equal to a preset temperature threshold value-safety margin and/or the target temperature is reached.
209. The heat pump unit is abnormally shut down;
210. recording the abnormal shutdown times;
211. whether the abnormal shutdown times are more than or equal to 3; if yes, go to step 212, otherwise go to step 213;
212. recording the ambient temperature and the current water temperature so as to be used as the limit capacity-increasing set water temperature at the ambient temperature next time;
213. starting at the frequency before abnormal shutdown, and executing the step 204 again;
214. if the electric heating device exists, the electric heating is started; step 206 is executed;
in this embodiment, the electric heating device may include a heating component of the heat pump unit itself, or may include a heating component disposed at a water outlet of the water heater, and this embodiment is not particularly limited.
215. Turning off the electric heating;
216. whether a large amount of water is not used for 2min continuously; if yes, executing step 217, otherwise, returning to step 202;
217. exiting the limit boost mode;
218. the heat pump unit is normally shut down.
In order to be more comprehensive, the application also provides a control device of the water heater, which corresponds to the control method of the water heater provided by the embodiment of the invention. Fig. 3 is a schematic structural diagram of an embodiment of a control device of a water heater according to the present invention, and as shown in fig. 3, the control device of the water heater according to the present embodiment includes an obtaining module 10, a determining module 11, and a control module 12.
The acquiring module 10 is used for acquiring exhaust information of a heat pump unit in the water heater;
the determining module 11 is configured to determine a limit heating frequency of the heat pump unit according to exhaust information of the heat pump unit and a preset safety limiting condition if it is detected that a hot water demand of a user is greater than a preset water consumption;
and the control module 12 is used for controlling the water heater to heat water in the water heater to a target water temperature under the limit heating frequency of the heat pump unit and then controlling the heat pump unit to execute an expected shutdown.
The control device of the water heater of the embodiment determines the limit heating frequency of the heat pump unit by acquiring the exhaust information of the heat pump unit in the water heater if the hot water demand of a user is detected to be larger than the preset water consumption, and controls the heat pump unit to execute the expected shutdown after the water heater heats the water in the water heater to the target water temperature under the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limiting condition, so that the automatic adjustment mode is realized when the hot water demand of the user is larger, the heating rate is improved, and the water in the water heater is rapidly heated. By adopting the technical scheme of the invention, the timeliness of hot water supply can be ensured.
Further, in the above embodiment, the preset safety limit condition includes a safety operation condition;
the determining module 11 is specifically configured to:
if the exhaust information of the heat pump unit meets the safe operation condition, determining the maximum operation frequency of the heat pump unit as the limit heating frequency;
in practical application, the preset safety limiting conditions further include safety starting conditions;
if the exhaust information of the heat pump unit does not meet the safe operation condition but meets the safe starting condition, reducing the maximum operation frequency of the heat pump unit to the safe operation frequency, and taking the safe operation frequency as the limit heating frequency;
the safe operation frequency is the operation frequency of the heat pump unit when the exhaust information meets the safe operation condition.
In this embodiment, the exhaust information of the heat pump unit includes an exhaust temperature of the heat pump unit and/or an exhaust pressure of the heat pump unit. The safe starting condition comprises that the exhaust temperature is less than or equal to a preset temperature threshold value, and the exhaust pressure is less than or equal to a preset pressure threshold value. The safe operation condition comprises that the difference value between the preset temperature threshold value and the exhaust temperature is less than or equal to the preset temperature margin, and the difference value between the preset pressure threshold value and the exhaust pressure is less than or equal to the preset pressure margin.
Further, in the above embodiment, the control module 12 is further configured to: when the heat pump unit operates at the safe operation frequency, if the temperature of water in the water heater is not increased to the target water temperature within the first preset time, the heat pump unit is controlled to be increased to the maximum operation frequency from the safe operation frequency.
Further, in the above embodiment, the control module 12 is further configured to control the heat pump unit to perform an abnormal shutdown if the exhaust information of the heat pump unit does not satisfy the safe starting condition.
Further, in the above embodiment, the control module 12 is further configured to obtain the current temperature of water in the water heater and the current ambient temperature of the water heater if the number of times that the heat pump unit executes the abnormal shutdown reaches the preset number of times; the target water temperature is updated with the current temperature, and the preset ambient temperature associated with the target water temperature is updated with the current ambient temperature.
Further, in the above embodiment, the control module 12 is further configured to record the current heating frequency of the heat pump unit in a specified time before the abnormal shutdown; and restarting the heat pump unit based on the current heating frequency so as to judge whether the heat pump unit executes abnormal shutdown again.
In a specific implementation process, the obtaining module 10 is further configured to determine a hot water demand of a user according to a water flow rate of the water heater within a second preset time; and/or determining the hot water demand of the user according to the water temperature change rate of the water heater in the third preset time; and/or determining the hot water demand of the user according to the received user operation instruction; and/or determining the hot water demand of the user according to the water using habit of the user corresponding to the current time.
In practical applications, if the water heater and/or the heat pump unit is provided with an electric heating device, the control module 12 is further configured to start the electric heating device if it is detected that the hot water demand of the user is greater than the preset water consumption, so as to heat water in the water heater and/or water flowing out of the water heater by using the electric heating device.
Further, in the above embodiment, the control module 12 is further configured to determine that the hot water demand of the user changes if it is detected that the hot water demand of the user is less than or equal to the preset water consumption, and count the duration of the change of the hot water demand of the user; and if the duration reaches the preset duration, recovering the initial operating frequency of the heat pump unit.
Further, in the above embodiment, the control module 12 is further configured to start the heat pump unit according to the limit heating frequency; or increasing the frequency of the heat pump unit to the limit heating frequency according to a preset frequency increasing coefficient.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
In order to be more comprehensive, the application also provides a control device of the water heater, which corresponds to the control method of the water heater provided by the embodiment of the invention. Fig. 4 is a schematic structural diagram of an embodiment of a control device of a water heater according to the present invention, and as shown in fig. 4, the control device of the water heater according to the present embodiment may include a processor 20 and a memory 21;
the processor 20 is connected to the memory 21:
wherein, the processor 20 is used for calling and executing the program stored in the memory 21;
the memory 21 is used for storing a program for executing at least the control method of the water heater shown in the above embodiment.
In order to be more comprehensive, the application also provides a water heater corresponding to the control method of the water heater provided by the embodiment of the invention. The water heater is provided with the control device of the water heater of the above embodiment.
In order to be more comprehensive, the present application also provides a storage medium, which stores a program thereon, and when the program is executed by a processor, the program realizes the steps of the control method of the water heater according to the above embodiment.
In order to be more comprehensive, corresponding to the control method of the water heater provided by the embodiment of the invention, the application also provides a processor, and the processor is used for running a program, wherein the program runs to execute the control method of the water heater of the embodiment.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (13)
1. A method of controlling a water heater, comprising:
acquiring exhaust information of a heat pump unit in the water heater;
if the fact that the hot water demand of a user is larger than the preset water consumption is detected, determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limiting condition;
controlling the water heater to heat water in the water heater to a target water temperature under the limit heating frequency of the heat pump unit, and controlling the heat pump unit to execute an expected shutdown;
if the fact that the hot water demand of the user is smaller than or equal to the preset water consumption is detected, determining that the hot water demand of the user changes;
counting the duration of the change of the hot water demand of the user;
if the duration reaches the preset duration, the initial operation frequency of the heat pump unit is recovered;
the preset safety limiting conditions comprise safety operation conditions and safety starting conditions;
the method for determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and the preset safety limiting condition comprises the following steps:
if the exhaust information of the heat pump unit meets the safe operation condition, determining the maximum operation frequency of the heat pump unit as the limit heating frequency;
if the exhaust information of the heat pump unit does not meet the safe operation condition but the exhaust information of the heat pump unit meets the safe starting condition, determining the safe operation frequency of the heat pump unit as the limit heating frequency; the safe operation frequency is the operation frequency of the heat pump unit when the exhaust information meets the safe operation condition in the process of reducing the frequency of the heat pump unit;
if the exhaust information of the heat pump unit does not meet the safe starting condition, controlling the heat pump unit to execute abnormal shutdown; if the number of times of executing the abnormal shutdown of the heat pump unit reaches a preset number of times, acquiring the current temperature of water in the water heater and the current ambient temperature of the water heater; and updating the current temperature to the target water temperature, and updating the current environment temperature to a preset environment temperature associated with the target water temperature.
2. The method of claim 1, wherein the heat pump unit exhaust information includes an exhaust temperature of the heat pump unit and an exhaust pressure of the heat pump unit;
the safe starting condition comprises that the exhaust temperature is less than or equal to a preset temperature threshold value, and the exhaust pressure is less than or equal to a preset pressure threshold value;
the safe operation condition comprises that the difference value between the preset temperature threshold value and the exhaust temperature is smaller than or equal to a preset water temperature allowance, and the difference value between the preset pressure threshold value and the exhaust pressure is smaller than or equal to a preset pressure allowance.
3. The method of claim 1, further comprising:
and when the heat pump unit operates at the safe operation frequency, if the temperature of water in the water heater is not increased to the target water temperature within a first preset time, controlling the heat pump unit to increase from the safe operation frequency to the maximum operation frequency.
4. The method of claim 1, wherein after controlling the heat pump unit to perform an abnormal shutdown, further comprising:
recording the current heating frequency of the heat pump unit within a specified time before abnormal shutdown;
and restarting the heat pump unit based on the current heating frequency so as to judge whether the heat pump unit executes abnormal shutdown again.
5. The method of claim 1, wherein before obtaining the venting information of the heat pump assembly in the water heater, the method further comprises:
determining the hot water demand of the user according to the water flow of the water heater within a second preset time; and/or
Determining the hot water demand of the user according to the water temperature change rate of the water heater within a third preset time; and/or
Determining the hot water demand of the user according to the received user operation instruction; and/or
And determining the hot water demand of the user according to the water using habit of the user corresponding to the current time.
6. The method according to any one of claims 1 to 5, wherein if the water outlet of the water heater and/or the heat pump unit is provided with an electric heating device, the method further comprises:
and if the fact that the hot water demand of the user is larger than the preset water consumption is detected, starting the electric heating device to heat the water in the water heater and/or the water flowing out of the water heater by using the electric heating device.
7. The method according to any one of claims 1-5, wherein after determining the limit heating frequency of the heat pump unit, the method further comprises:
starting the heat pump unit according to the limit heating frequency; alternatively, the first and second electrodes may be,
and increasing the frequency of the heat pump unit to the limit heating frequency according to a preset frequency increasing coefficient.
8. The method according to any one of claims 1-5, wherein after controlling the water heater to heat water in the water heater to a target water temperature at a limit heating frequency of the heat pump unit, before controlling the heat pump unit to perform an expected shutdown, further comprises:
and if the requirement of the user on hot water is detected to be larger than the preset water consumption, setting the target water temperature.
9. A control device for a water heater, comprising:
the acquisition module is used for acquiring exhaust information of the heat pump unit in the water heater;
the determining module is used for determining the limit heating frequency of the heat pump unit according to the exhaust information of the heat pump unit and a preset safety limiting condition if the fact that the hot water demand of a user is larger than the preset water consumption is detected;
the control module is used for controlling the water heater to heat water in the water heater to a target water temperature under the limit heating frequency of the heat pump unit and then controlling the heat pump unit to execute expected shutdown; if the fact that the hot water demand of the user is smaller than or equal to the preset water consumption is detected, determining that the hot water demand of the user changes; counting the duration of the change of the hot water demand of the user; if the duration reaches the preset duration, the initial operation frequency of the heat pump unit is recovered;
the preset safety limiting conditions comprise safety operation conditions and safety starting conditions;
the determining module is used for determining the maximum operating frequency of the heat pump unit as the limit heating frequency if the exhaust information of the heat pump unit meets the safe operating condition; if the exhaust information of the heat pump unit does not meet the safe operation condition but the exhaust information of the heat pump unit meets the safe starting condition, determining the safe operation frequency of the heat pump unit as the limit heating frequency; the safe operation frequency is the operation frequency of the heat pump unit when the exhaust information meets the safe operation condition in the process of reducing the frequency of the heat pump unit;
the control module is further used for controlling the heat pump unit to execute abnormal shutdown if the exhaust information of the heat pump unit does not meet the safe starting condition; if the number of times of executing the abnormal shutdown of the heat pump unit reaches a preset number of times, acquiring the current temperature of water in the water heater and the current ambient temperature of the water heater; and updating the current temperature to the target water temperature, and updating the current environment temperature to a preset environment temperature associated with the target water temperature.
10. A control apparatus for a water heater comprising a processor and a memory;
the processor is connected with the memory:
the processor is used for calling and executing the program stored in the memory;
the memory is used for storing the program, and the program is at least used for executing the control method of the water heater of any one of claims 1-8.
11. A water heater characterized in that a control device of the water heater as claimed in claim 10 is provided.
12. A storage medium characterized by comprising a stored program, wherein the program executes the control method of a water heater according to any one of claims 1 to 8.
13. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the control method of the water heater according to any one of claims 1 to 8 when running.
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| CN112944669A (en) * | 2021-03-31 | 2021-06-11 | 海信(广东)厨卫系统股份有限公司 | Water heater and capacity increasing control method thereof |
| CN113669966A (en) * | 2021-07-21 | 2021-11-19 | 浙江中广电器股份有限公司 | Method for controlling operation of heat pump unit through water temperature |
| CN114151980A (en) * | 2021-10-26 | 2022-03-08 | 浙江中广电器股份有限公司 | Water heater and energy-saving control device and method thereof |
| CN114183889B (en) * | 2021-12-23 | 2023-07-28 | 邵阳学院 | Control method and control device of air conditioner and air conditioner |
| CN117824160A (en) * | 2022-09-27 | 2024-04-05 | 美的集团股份有限公司 | Photovoltaic-based heat pump water heater control method, device, equipment and storage medium |
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