CN112050472B - Water temperature control method and device for water heater and storage medium - Google Patents
Water temperature control method and device for water heater and storage medium Download PDFInfo
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- CN112050472B CN112050472B CN202010859135.9A CN202010859135A CN112050472B CN 112050472 B CN112050472 B CN 112050472B CN 202010859135 A CN202010859135 A CN 202010859135A CN 112050472 B CN112050472 B CN 112050472B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Abstract
The invention discloses a water temperature control method of a water heater, wherein the water heater comprises a heating cavity, and the control method comprises the following steps: judging whether a starting-up instruction is acquired; under the condition that the starting-up instruction is obtained, calculating a first water temperature in the heating cavity; and generating a corresponding water temperature control instruction based on the first water temperature. The invention also discloses a water temperature control device of the water heater. Through improving the water temperature control program of the traditional water heater in the water outlet process, the water temperature in the heating cavity of the water heater is estimated before a user uses water, and different control methods are adopted according to the estimation result, so that the situation that the water is overheated in the water outlet process is avoided, the normal water use of the user is ensured, the use safety of the user is improved, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of water heater control, in particular to a water temperature control method of a water heater, a water temperature control device of the water heater and a computer readable storage medium.
Background
With the continuous improvement of living conditions, more and more water heaters are provided for each family. In the course of real life, there are a large number of water usage scenarios, and further, technicians have developed a variety of water usage devices for domestic use, particularly water heating devices.
The existing various household water heaters generally comprise a water inlet pipe, a water outlet pipe and an internal heating cavity, when a user needs hot water, the heating cavity is rapidly heated (for example, in a gas heating mode) so as to provide hot water for the user, and therefore the existing household water heaters often have the advantages of being fast in hot water outlet, small in size, convenient to install and the like.
However, in the practical application process, if the time interval between the start and the shutdown (or between the water supply and the water cut-off) of the user is short, due to the system hysteresis of the conventional water heater, the water in the heating cavity is often overheated, and the temperature of the water discharged from the water outlet pipe is too high, which brings trouble to the user. Especially for high-power water heaters, water with too high temperature can be discharged and the users can be scalded, and potential safety threats are brought to the use of the users.
Disclosure of Invention
In order to overcome the technical problems that the water outlet overheating of a household water heater causes troubles and safety threats to users in the prior art, the embodiment of the invention provides the water temperature control method of the water heater.
In order to achieve the above object, an embodiment of the present invention provides a water temperature control method for a water heater, where the water heater includes a heating cavity, the control method includes: judging whether a starting-up instruction is acquired; under the condition that the starting-up instruction is obtained, calculating a first water temperature in the heating cavity; and generating a corresponding water temperature control instruction based on the first water temperature.
Preferably, the calculating the first water temperature in the heating cavity comprises: acquiring heating stopping time of the water heater for executing heating stopping operation last time and a corresponding second water temperature; acquiring a first time difference between the heating stopping time and the current time; calculating the first water temperature based on preset system parameters, the second water temperature and the first time difference.
Preferably, the preset system parameters include a preset system lag time, a preset system heat dissipation coefficient and a temperature rise rate; wherein the rate of temperature rise is calculated as follows: acquiring real-time water temperature and corresponding temperature adjusting time in the running process of the water heater in real time; acquiring temperature rise time consumed by increasing the temperature in the real-time water temperature by a preset temperature interval on the basis of the temperature regulation time; calculating the temperature rise rate based on the preset temperature interval and the temperature rise time; the preset system lag time and the preset system heat dissipation coefficient are calculated as follows: obtaining a plurality of test operation data corresponding to a plurality of water heaters; and obtaining the preset system lag time and the preset system heat dissipation coefficient based on the plurality of test operation data.
Preferably, the temperature rise time of the temperature rise rate is calculated as an optimized temperature rise time, and the optimized temperature rise time is calculated as follows: obtaining a plurality of closest temperature rise times which are closest to the current time according to the preset temperature rise times; and optimizing the temperature rise time obtained based on the temperature regulation time based on the plurality of closest temperature rise times to obtain the optimized temperature rise time.
Preferably, said calculating a first water temperature of said heating chamber based on preset system parameters, said second water temperature and said first time difference comprises: comparing the first time difference with the preset system lag time; if the first time difference is less than or equal to the preset system lag time, calculating the first water temperature according to a first calculation rule, wherein the first calculation rule is characterized as follows: t1 ═ T2+ V1 × T; wherein T1 is indicative of the first water temperature, T2 is indicative of the second water temperature, V1 is indicative of the temperature rise rate, and T is indicative of the first time difference; if the first time difference is larger than the preset system lag time, calculating the first water temperature according to a second calculation rule, wherein the second calculation rule is characterized as follows: t1 ═ T2+ V1 × T0-k (T-T0); wherein t0 represents the preset system lag time, and k represents the preset system heat dissipation coefficient.
Preferably, the generating of the corresponding water temperature control command based on the first water temperature includes: acquiring preset delay time and inlet water temperature of the water heater; comparing the first water temperature with a set target temperature; if the first water temperature is greater than or equal to the set target temperature, generating a first water temperature control instruction based on the preset delay time; if the first water temperature is lower than the set target temperature, comparing the sum of the deviation between the inlet water temperature and the preset temperature with the first water temperature: if the sum of the inlet water temperature and the preset temperature deviation is smaller than the first water temperature, generating a second water temperature control instruction based on the first water temperature; and if the sum of the inlet water temperature and the preset temperature deviation is greater than or equal to the first water temperature, generating a third water temperature control instruction.
Preferably, the first water temperature control instruction includes: waiting for the preset delay time, heating the preset delay time according to the minimum heating power, and then switching to a normal heating mode to execute water temperature control operation; the second water temperature control command comprises: after heating the preset delay time according to the heating power generated based on the first water temperature, switching to a normal heating mode to execute the water temperature control operation; the third water temperature control instruction comprises: the water temperature control operation is performed in a normal heating mode.
Preferably, the preset delay time is calculated as follows: acquiring the volume of water in the heating cavity and the current water inlet flow of the water heater; calculating the preset delay time according to a third calculation rule, wherein the third calculation rule is characterized as follows: t1 ═ V/(2 × F); wherein t1 represents the preset delay time, V represents the volume of water in the heating cavity, and F represents the current water inlet flow.
Correspondingly, the invention also provides a water temperature control device of a water heater, wherein the water heater comprises a heating cavity, and the control device comprises: the judging module is used for judging whether a starting instruction is acquired or not; the obtaining module is used for calculating a first water temperature in the heating cavity under the condition that the starting-up instruction is obtained; and the control module is used for generating a corresponding water temperature control instruction based on the first water temperature.
Preferably, the obtaining module includes: the first acquisition unit is used for acquiring the heating stopping time of the water heater for executing the heating stopping operation last time and the corresponding second water temperature; the second acquisition unit is used for acquiring a first time difference between the heating stop time and the current time; a third obtaining unit, configured to calculate the first water temperature based on preset system parameters, the second water temperature, and the first time difference.
Preferably, the preset system parameters include a preset system lag time, a preset system heat dissipation coefficient and a temperature rise rate, the third obtaining unit includes a first calculating subunit and a second calculating subunit, and the first calculating subunit is configured to: acquiring real-time water temperature and corresponding temperature adjusting time in the running process of the water heater in real time; acquiring temperature rise time consumed by increasing the temperature in the real-time water temperature by a preset temperature interval on the basis of the temperature regulation time; calculating the temperature rise rate based on the preset temperature interval and the temperature rise time; the second computing subunit is to: obtaining a plurality of test operation data corresponding to a plurality of water heaters; and obtaining the preset system lag time and the preset system heat dissipation coefficient based on the plurality of test operation data.
Preferably, the temperature rise time of the temperature rise rate is calculated as an optimized temperature rise time, and the first calculating subunit is further configured to: obtaining a plurality of closest temperature rise times which are closest to the current time according to the preset temperature rise times; and optimizing the temperature rise time obtained based on the temperature regulation time based on the plurality of closest temperature rise times to obtain the optimized temperature rise time information.
Preferably, the third obtaining unit is configured to: comparing the first time difference with the preset system lag time; if the first time difference is less than or equal to the preset system lag time, calculating the first water temperature according to a first calculation rule, wherein the first calculation rule is characterized as follows: t1 ═ T2+ V1 × T; wherein T1 is indicative of the first water temperature, T2 is indicative of the second water temperature, V1 is indicative of the temperature rise rate, and T is indicative of the first time difference; if the first time difference is larger than the preset system lag time, calculating the first water temperature according to a second calculation rule, wherein the second calculation rule is characterized as follows: t1 ═ T2+ V1 × T0-k (T-T0); wherein t0 represents the preset system lag time, and k represents the preset system heat dissipation coefficient.
Preferably, the control module comprises: the fifth acquisition unit is used for acquiring preset delay time and the inlet water temperature of the water heater; the first comparison unit is used for comparing the first water temperature with a set target temperature; a first instruction generating unit, configured to generate a first water temperature control instruction based on the preset delay time if the first water temperature is greater than or equal to the set target temperature; a second comparing unit, configured to, if the first water temperature is lower than the set target temperature, compare a sum of the intake water temperature and a preset temperature deviation with a magnitude of the first water temperature: a second instruction generating unit, configured to generate a second water temperature control instruction based on the first water temperature if a sum of the inlet water temperature and the preset temperature deviation is smaller than the first water temperature; and the third instruction generating unit is used for generating a third water temperature control instruction if the sum of the inlet water temperature and the preset temperature deviation is greater than or equal to the first water temperature.
Preferably, the first water temperature control instruction includes: waiting for the preset delay time, heating the preset delay time according to the minimum heating power, and then switching to a normal heating mode to execute water temperature control operation; the second water temperature control command comprises: after heating the preset delay time according to the heating power generated based on the first water temperature, switching to a normal heating mode to execute the water temperature control operation; the third water temperature control instruction comprises: the water temperature control operation is performed in a normal heating mode.
Preferably, the preset delay time is calculated as follows: acquiring the volume of water in the heating cavity and the current water inlet flow of the water heater; calculating the preset delay time according to a third calculation rule, wherein the third calculation rule is characterized as follows: t1 ═ V/(2 × F); wherein t1 represents the preset delay time, V represents the volume of water in the heating cavity, and F represents the current water inlet flow.
In another aspect, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the method provided by the present invention.
Through the technical scheme provided by the invention, the invention at least has the following technical effects:
through improving the water temperature control program of the traditional water heater in the water outlet process, the water temperature in the heating cavity of the water heater is estimated before a user uses water, and different control methods are adopted according to the estimation result, so that the situation that the water is overheated in the water outlet process is avoided, the normal water use of the user is ensured, the use safety of the user is improved, and the user experience is improved.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention and not to limit the embodiments of the invention. In the drawings:
FIG. 1 is a flowchart illustrating a specific implementation of a method for controlling water temperature of a water heater according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a specific implementation of obtaining a first water temperature in a water temperature control method of a water heater according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a specific implementation of generating a water temperature control command in a water temperature control method of a water heater according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a water temperature control device of a water heater according to an embodiment of the present invention.
Detailed Description
In order to overcome the technical problems that the water outlet overheating of a household water heater causes troubles and safety threats to users in the prior art, the embodiment of the invention provides the water temperature control method of the water heater.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
The terms "system" and "network" in embodiments of the present invention may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present invention. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified. In addition, it should be understood that the terms first, second, etc. in the description of the embodiments of the invention are used for distinguishing between the descriptions and are not intended to indicate or imply relative importance or order to be construed.
Referring to fig. 1, an embodiment of the present invention provides a method for controlling a water temperature of a water heater, where the water heater includes a heating cavity, and the method includes:
s10) judging whether a starting instruction is acquired;
s20) under the condition that the starting-up instruction is obtained, calculating a first water temperature in the heating cavity;
s30) generating a corresponding water temperature control command based on the first water temperature.
In a possible embodiment, the control device of the invention monitors the operation state of the gas water heater in real time during the use process of the gas water heater by a user. At a certain moment, the user needs to use the gas water heater, so that a starting instruction is sent to the gas water heater. At this time, after the control device monitors the start-up instruction, the first water temperature of the gas water heater is immediately calculated, for example, in the embodiment of the present invention, the gas water heater includes a heating cavity, the first water temperature is the water temperature in the heating cavity, the control link is adjusted according to the first water temperature, and a corresponding water temperature control instruction is generated, at this time, the gas water heater executes a corresponding water heating operation according to the water temperature control instruction, and water with a proper temperature is discharged for a user to use.
In the embodiment of the invention, the estimation of the water temperature in the heating cavity is introduced into the traditional water temperature heating method of the water heater, and the final water temperature heating method is adjusted according to the estimated water temperature, so that a more proper water temperature control method is generated, and water with proper temperature is discharged for users to use, thereby avoiding the trouble or potential safety threat caused by overhigh water outlet temperature to the users, and improving the user experience.
Referring to fig. 2, in the embodiment of the present invention, the calculating the first water temperature in the heating cavity includes:
s201) obtaining the heating stopping time of the water heater for executing the heating stopping operation last time and a corresponding second water temperature;
s202) acquiring a first time difference between the heating stopping time and the current time;
s203) calculating the first water temperature based on preset system parameters, the second water temperature and the first time difference.
In the embodiment of the invention, the preset system parameters comprise the preset system lag time, the preset system heat dissipation coefficient and the temperature rise rate; wherein the rate of temperature rise is calculated as follows: acquiring real-time water temperature and corresponding temperature adjusting time in the running process of the water heater in real time; acquiring temperature rise time consumed by increasing the temperature in the real-time water temperature by a preset temperature interval on the basis of the temperature regulation time; calculating the temperature rise rate based on the preset temperature interval and the temperature rise time; the preset system lag time and the preset system heat dissipation coefficient are calculated as follows: obtaining a plurality of test operation data corresponding to a plurality of water heaters; and obtaining the preset system lag time and the preset system heat dissipation coefficient based on the plurality of test operation data.
In order to provide better control of the temperature of the water output from the gas water heater, it is therefore necessary to estimate the temperature of the water in the heating chamber before heating. In a possible implementation manner, the heating stop time of the gas water heater for performing the heating stop operation last time and the corresponding second water temperature are firstly obtained, for example, in the embodiment of the present invention, the second water temperature is the outlet water temperature of the gas water heater, and the outlet water temperature at this moment is equal to the water temperature in the heating cavity. At this time, the first time difference between the current time and the previous heating stop time may be obtained, and then the control device further obtains the system parameters stored in the gas water heater.
In the embodiment of the invention, in the operation process of the water heater, the control device acquires the real-time water temperature of the water heater in the heating process and the corresponding temperature adjusting time in real time, and further obtains the temperature rising time spent by the water in the water heater per liter by a preset temperature interval, for example, in the embodiment of the invention, the water temperature in the water heater is raised by 5 degrees, the time is consumed by 0.5min, the preset temperature interval is 1 degree, namely the time spent by the water temperature in the water heater is obtained by 0.1min when the water temperature is raised by 1 degree, so that the temperature rising rate of the water heater is obtained and stored as 10 degrees/min. On the other hand, before the water heater is used or before the water heater leaves a factory, a technician tests a plurality of same water heaters, for example, a plurality of same water heaters is subjected to a switch test, and records the water inlet temperature, the water outlet temperature and the water temperature in the heating cavity of each water heater in the test process, so that the system lag time between the time when a shutdown instruction is sent to the water heater and the time when the water heater stops heating is obtained, meanwhile, the heat dissipation process of the water temperature in the heating cavity after the heating is stopped is a function changing along with the time, so that the coefficient of the system heat dissipation function of the water heater can be determined through the recording of the data, and after the coefficient of the system heat dissipation function is obtained, the technician stores the coefficient in the water heater.
It should be noted that, in the embodiment of the present invention, a technician may first obtain the preset system parameter according to actual needs, and then obtain the heating stop time and the corresponding second water temperature, and further obtain the first time difference, which belongs to the scope of the present invention, and the above embodiment should not be considered as a limitation to the protection scope of the present invention, and will not be described in detail herein.
Further, in the embodiment of the present invention, the temperature rise time of the temperature rise rate is calculated as an optimized temperature rise time, and the optimized temperature rise time is calculated as follows: obtaining a plurality of closest temperature rise times which are closest to the current time according to the preset temperature rise times; and optimizing the temperature rise time obtained based on the temperature regulation time based on the plurality of pieces of closest temperature rise time information to obtain the optimized temperature rise time.
In the use process of the water heater, the heating speed and the heating efficiency of the water heater are different due to different service lives, different heating environments, different heating time and the like, so that the data deviation can be caused if the last heating time is directly obtained for calculation.
In order to solve the above technical problem, in the embodiment of the present invention, the preset temperature rise number is preferably 3, after obtaining the temperature rise time, further obtaining 3 times of temperature rise time closest to the current time, for example, the temperature rise time is heating time when the water temperature rises by 1 °, then obtaining corresponding time average values according to the 3 heating times, and taking the time evaluation value as the finally optimized temperature rise time.
In the embodiment of the invention, the data effectiveness is ensured by obtaining the temperature rise time closest to the current time, and the final temperature rise time is optimized according to the plurality of closest temperature rise times, so that the accuracy of the data is further improved, a more accurate estimated value of the water temperature in the heating cavity can be obtained in the subsequent calculation process, the accuracy of water temperature control is improved, a user can be ensured to use the water supply with the optimal temperature, and the user experience is improved.
In an embodiment of the present invention, the calculating the first water temperature of the heating chamber based on the preset system parameter, the second water temperature and the first time difference includes: comparing the first time difference with the preset system lag time; if the first time difference is less than or equal to the preset system lag time, calculating the first water temperature according to a first calculation rule, wherein the first calculation rule is characterized as follows: t1 ═ T2+ V1 × T; wherein T1 is indicative of the first water temperature, T2 is indicative of the second water temperature, V1 is indicative of the temperature rise rate, and T is indicative of the first time difference; if the first time difference is larger than the preset system lag time, calculating the first water temperature according to a second calculation rule, wherein the second calculation rule is characterized as follows: t1 ═ T2+ V1 × T0-k (T-T0); wherein t0 represents the preset system lag time, and k represents the preset system heat dissipation coefficient.
After the heating is stopped, the water in the heating cavity firstly continues to be heated by the waste heat and stops being heated after the preset system lag time is continuously heated, at the moment, the water in the heating cavity starts to be cooled, and the cooling speed follows the rule of a system heat dissipation function until the water temperature reaches the normal temperature or the same temperature as that of the water inlet pipe. Therefore, in the embodiment of the invention, the water temperature in the heating cavity is correspondingly calculated according to the time for the user to turn on the water heater again.
In a possible embodiment, the control device obtains that the previous heating stop time of a certain water heater is 15 minutes 05 seconds, the leaving water temperature when heating is stopped is 40 °, namely the water temperature in the heating cavity when heating is stopped is also 40 °, and obtains a start-up instruction for the water heater in 15 minutes 21 seconds, namely the first time difference of the water heater is 16 seconds at this time, and the system later time of the water heater is 3 seconds, so that the first water temperature in the current heating cavity is calculated according to the second calculation rule, and the first water temperature in the current heating cavity is calculated to be 33 ° according to the prestored temperature rise rate information V1 and the system heat dissipation coefficient k.
In the embodiment of the invention, the physical heating process of the water heater is analyzed, and different calculation modes are adopted according to the relation between the starting instruction of the user and the previous heating stopping time, so that the accurate calculation of the water temperature in the heating cavity is realized, the accurate calculation result of the water temperature in the heating cavity can be obtained, the control accuracy in the subsequent water temperature control process according to the first water temperature is ensured, and the user experience is improved.
Referring to fig. 3, in an embodiment of the present invention, the generating the corresponding water temperature control command based on the first water temperature includes:
s301) acquiring preset delay time and inlet water temperature of the water heater;
s302) comparing the first water temperature with a set target temperature;
s3031) if the first water temperature is greater than or equal to the set target temperature, generating a first water temperature control instruction based on the preset delay time;
s3032) if the first water temperature is lower than the set target temperature, comparing the sum of the deviation between the inlet water temperature and the preset temperature with the first water temperature:
s30321) if the sum of the inlet water temperature and the preset temperature deviation is smaller than the first water temperature, generating a second water temperature control instruction based on the first water temperature;
s30322) if the sum of the inlet water temperature and the preset temperature deviation is larger than or equal to the first water temperature, generating a third water temperature control instruction.
In an embodiment of the present invention, the first water temperature control instruction includes: waiting for the preset delay time, heating the preset delay time according to the minimum heating power, and then switching to a normal heating mode to execute water temperature control operation; the second water temperature control command comprises: after heating the preset delay time according to the heating power generated based on the first water temperature, switching to a normal heating mode to execute the water temperature control operation; the third water temperature control instruction comprises: the water temperature control operation is performed in a normal heating mode.
Further, in the embodiment of the present invention, the preset delay time is calculated as follows: acquiring the volume of water in the heating cavity and the current water inlet flow of the water heater; calculating the preset delay time according to a third calculation rule, wherein the third calculation rule is characterized as follows: t1 ═ V/(2 × F); wherein t1 represents the preset delay time, V represents the volume of water in the heating cavity, and F represents the current water inlet flow.
In a possible implementation manner, after the first water temperature that estimates the water temperature in the heating cavity is obtained, the control device further obtains a preset delay time and the water temperature of the inlet water, in an embodiment of the present invention, the preset delay time is calculated according to the third calculation rule by using the volume of the water stored in the heating cavity and the current water flow rate of the inlet water. At this time, the estimated first water temperature is compared with a set target temperature, for example, the set target temperature is a target temperature manually set by a user, and the first water temperature is found to be greater than the target temperature, so that a first water temperature control command is generated, for example, in an embodiment of the present invention, the first water temperature control command is: and waiting for a preset delay time, then heating by using minimum power, and recovering a normal water heating control mode after the heating time reaches the preset delay time.
In another possible embodiment, the control device determines that the first water temperature is less than the target temperature according to the acquired first water temperature and a target temperature set by a user, and therefore further compares the sum of the acquired inlet water temperature and a preset temperature deviation with the first water temperature, for example, in the embodiment of the present invention, the preset temperature deviation is a temperature tolerance of the water heater, and preferably, the temperature tolerance is 2 °. The control device determines that the sum of the inlet water temperature and the temperature tolerance is less than the first water temperature, so that the inlet water temperature of the water heater is replaced by the first water temperature to calculate the required heating power, the heating is carried out according to the calculated heating power, and the normal water temperature heating control mode is recovered after the preset delay time is heated.
In still another possible embodiment, the control means determines that the first water temperature is less than the target temperature based on the acquired first water temperature and the target temperature set by the user, and further determines that the sum of the temperature tolerance of the intake water temperature and the temperature is greater than the first water temperature, thereby controlling the water heater to heat in a normal water temperature heating control manner without any compensation operation.
In the embodiment of the invention, the water temperature in the heating cavity is accurately estimated according to the real physical heating process of the water heater, and the corresponding adjustment and optimization are carried out on the water temperature heating mode according to the estimation result before the user uses the water heater for the next time, so that the technical problem that the user switches on and off the water heater in a short time in the prior art, and the user is puzzled or injured due to overhigh outlet water temperature caused by waste heat is solved, the adverse effect of the user in the using process is reduced, the use safety of the user is improved, and the user experience is improved.
The following describes a water temperature control device of a water heater according to an embodiment of the present invention with reference to the accompanying drawings.
Referring to fig. 4, based on the same inventive concept, an embodiment of the present invention provides a water temperature control device for a water heater, where the water heater includes a heating cavity, and the control device includes: the judging module is used for judging whether a starting instruction is acquired or not; the obtaining module is used for calculating a first water temperature in the heating cavity under the condition that the starting-up instruction is obtained; and the control module is used for generating a corresponding water temperature control instruction based on the first water temperature.
In an embodiment of the present invention, the obtaining module includes: the first acquisition unit is used for acquiring the heating stopping time of the water heater for executing the heating stopping operation last time and the corresponding second water temperature; the second acquisition unit is used for acquiring a first time difference between the heating stop time and the current time; a third obtaining unit, configured to calculate the first water temperature based on preset system parameters, the second water temperature, and the first time difference.
In this embodiment of the present invention, the preset system parameters include a preset system lag time, a preset system heat dissipation coefficient, and a temperature rise rate, the third obtaining unit includes a first calculating subunit and a second calculating subunit, and the first calculating subunit is configured to: acquiring real-time water temperature and corresponding temperature adjusting time in the running process of the water heater in real time; acquiring temperature rise time consumed by increasing the temperature in the real-time water temperature by a preset temperature interval on the basis of the temperature regulation time; calculating the temperature rise rate based on the preset temperature interval and the temperature rise time; the second computing subunit is to: obtaining a plurality of test operation data corresponding to a plurality of water heaters; and obtaining the preset system lag time and the preset system heat dissipation coefficient based on the plurality of test operation data.
In this embodiment of the present invention, the temperature rise time of the temperature rise rate is calculated as the optimized temperature rise time, and the first calculating subunit is further configured to: obtaining a plurality of closest temperature rise times which are closest to the current time according to the preset temperature rise times; and optimizing the temperature rise time obtained based on the temperature regulation time based on the plurality of closest temperature rise times to obtain the optimized temperature rise time.
In an embodiment of the present invention, the third obtaining unit is configured to: comparing the first time difference with the preset system lag time; if the first time difference is smaller than or equal to the preset system lag time, calculating the first water temperature according to a first calculation rule, wherein the first calculation rule is characterized as follows: t1 ═ T2+ V1 × T; wherein T1 is indicative of the first water temperature, T2 is indicative of the second water temperature, V1 is indicative of the temperature rise rate, and T is indicative of the first time difference; if the first time difference is larger than the preset system lag time, calculating the first water temperature according to a second calculation rule, wherein the second calculation rule is characterized as follows: t1 ═ T2+ V1 × T0-k (T-T0); wherein t0 represents the preset system lag time, and k represents the preset system heat dissipation coefficient.
In an embodiment of the present invention, the control module includes: the fifth acquisition unit is used for acquiring preset delay time and the inlet water temperature of the water heater; the first comparison unit is used for comparing the first water temperature with a set target temperature; a first instruction generating unit, configured to generate a first water temperature control instruction based on the preset delay time if the first water temperature is greater than or equal to the set target temperature; the second comparison unit is used for comparing the sum of the water inlet temperature and the preset temperature deviation with the first water temperature if the first water temperature is lower than the set target temperature; a second instruction generating unit, configured to generate a second water temperature control instruction based on the first water temperature if a sum of the inlet water temperature and the preset temperature deviation is smaller than the first water temperature; and the third instruction generating unit is used for generating a third water temperature control instruction if the sum of the inlet water temperature and the preset temperature deviation is greater than or equal to the first water temperature.
In an embodiment of the present invention, the first water temperature control instruction includes: waiting for the preset delay time, heating the preset delay time according to the minimum heating power, and then switching to a normal heating mode to execute water temperature control operation; the second water temperature control command comprises: after heating the preset delay time according to the heating power generated based on the first water temperature, switching to a normal heating mode to execute the water temperature control operation; the third water temperature control instruction comprises: the water temperature control operation is performed in a normal heating mode.
In the embodiment of the present invention, the preset delay time is calculated as follows: acquiring the volume of water in the heating cavity and the current water inlet flow of the water heater; calculating the preset delay time according to a third calculation rule, wherein the third calculation rule is characterized as follows: t1 ═ V/(2 × F); wherein t1 represents the preset delay time, V represents the volume of water in the heating cavity, and F represents the current water inlet flow.
Further, an embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the method of the present invention.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (13)
1. A method of controlling a temperature of water in a water heater including a heating chamber, the method comprising:
judging whether a starting-up instruction is acquired;
under the condition that the starting-up instruction is obtained, calculating a first water temperature in the heating cavity;
generating a corresponding water temperature control instruction based on the first water temperature;
the calculating a first water temperature in the heating cavity comprises:
acquiring heating stopping time of the water heater for executing heating stopping operation last time and a corresponding second water temperature;
acquiring a first time difference between the heating stopping time and the current time;
calculating the first water temperature based on preset system parameters, the second water temperature and the first time difference;
the system parameter of predetermineeing includes system lag time, predetermines system heat dissipation coefficient and temperature rise rate, calculate based on predetermineeing system parameter, the second temperature and the first time difference the first temperature in heating chamber includes:
comparing the first time difference with the preset system lag time;
if the first time difference is less than or equal to the preset system lag time, calculating the first water temperature according to a first calculation rule, wherein the first calculation rule is characterized as follows:
T1＝T2+V1*t；
wherein T1 is indicative of the first water temperature, T2 is indicative of the second water temperature, V1 is indicative of the temperature rise rate, and T is indicative of the first time difference;
if the first time difference is larger than the preset system lag time, calculating the first water temperature according to a second calculation rule, wherein the second calculation rule is characterized as follows:
T1＝T2+V1*t0-k(t-t0)；
wherein t0 represents the preset system lag time, and k represents the preset system heat dissipation coefficient.
2. The control method according to claim 1, wherein the temperature rise rate is calculated as follows:
acquiring real-time water temperature and corresponding temperature adjusting time in the running process of the water heater in real time;
acquiring temperature rise time consumed by increasing the temperature in the real-time water temperature by a preset temperature interval on the basis of the temperature regulation time;
calculating the temperature rise rate based on the preset temperature interval and the temperature rise time;
the preset system lag time and the preset system heat dissipation coefficient are calculated as follows:
obtaining a plurality of test operation data corresponding to a plurality of water heaters;
and obtaining the preset system lag time and the preset system heat dissipation coefficient based on the plurality of test operation data.
3. The control method according to claim 2, wherein the temperature rise time at which the temperature rise rate is calculated is an optimized temperature rise time calculated as follows:
obtaining a plurality of closest temperature rise times which are closest to the current time according to the preset temperature rise times;
and optimizing the temperature rise time obtained based on the temperature regulation time based on the plurality of closest temperature rise times to obtain the optimized temperature rise time.
4. The control method of claim 1, wherein generating a corresponding water temperature control command based on the first water temperature comprises:
acquiring preset delay time and inlet water temperature of the water heater;
comparing the first water temperature with a set target temperature;
if the first water temperature is greater than or equal to the set target temperature, generating a first water temperature control instruction based on the preset delay time;
if the first water temperature is lower than the set target temperature, comparing the sum of the deviation between the inlet water temperature and the preset temperature with the first water temperature: if the sum of the inlet water temperature and the preset temperature deviation is smaller than the first water temperature, generating a second water temperature control instruction based on the first water temperature; and if the sum of the inlet water temperature and the preset temperature deviation is greater than or equal to the first water temperature, generating a third water temperature control instruction.
5. The control method according to claim 4,
the first water temperature control instruction comprises:
waiting for the preset delay time, heating the preset delay time according to the minimum heating power, and then switching to a normal heating mode to execute water temperature control operation;
the second water temperature control command comprises:
after heating for the preset delay time according to the heating power generated based on the first water temperature, switching to a normal heating mode to execute the water temperature control operation;
the third water temperature control instruction comprises:
the water temperature control operation is performed in a normal heating mode.
6. The control method according to claim 4, wherein the preset delay time is calculated as follows:
acquiring the volume of water in the heating cavity and the current water inlet flow of the water heater;
calculating the preset delay time according to a third calculation rule, wherein the third calculation rule is characterized as follows:
t1＝V/(2*F)；
wherein t1 represents the preset delay time, V represents the volume of water in the heating cavity, and F represents the current water inlet flow.
7. A water temperature control device of a water heater, the water heater comprising a heating chamber, the control device comprising:
the judging module is used for judging whether a starting instruction is acquired or not;
the obtaining module is used for calculating a first water temperature in the heating cavity under the condition of obtaining the starting-up instruction;
the control module is used for generating a corresponding water temperature control instruction based on the first water temperature;
the acquisition module includes:
the first acquisition unit is used for acquiring the heating stopping time of the water heater for executing the heating stopping operation last time and the corresponding second water temperature;
the second acquisition unit is used for acquiring a first time difference between the heating stop time and the current time;
a third obtaining unit, configured to calculate the first water temperature based on preset system parameters, the second water temperature, and the first time difference;
the preset system parameters comprise preset system lag time, preset system heat dissipation coefficient and temperature rise rate, and the third acquisition unit is used for:
comparing the first time difference with the preset system lag time;
if the first time difference is less than or equal to the preset system lag time, calculating the first water temperature according to a first calculation rule, wherein the first calculation rule is characterized as follows:
T1＝T2+V1*t；
wherein T1 is indicative of the first water temperature, T2 is indicative of the second water temperature, V1 is indicative of the temperature rise rate, and T is indicative of the first time difference;
if the first time difference is larger than the preset system lag time, calculating the first water temperature according to a second calculation rule, wherein the second calculation rule is characterized as follows:
T1＝T2+V1*t0-k(t-t0)；
wherein t0 represents the preset system lag time, and k represents the preset system heat dissipation coefficient.
8. The control device according to claim 7, wherein the third acquisition unit includes a first calculation subunit and a second calculation subunit, the first calculation subunit being configured to:
acquiring real-time water temperature and corresponding temperature adjusting time in the running process of the water heater in real time;
acquiring temperature rise time consumed by increasing the temperature in the real-time water temperature by a preset temperature interval on the basis of the temperature regulation time;
calculating the temperature rise rate based on the preset temperature interval and the temperature rise time;
the second computing subunit is to:
obtaining a plurality of test operation data corresponding to a plurality of water heaters;
and obtaining the preset system lag time and the preset system heat dissipation coefficient based on the plurality of test operation data.
9. The control device according to claim 8, wherein the temperature rise time at the temperature rise rate is calculated as an optimized temperature rise time, and the first calculating subunit is further configured to:
obtaining a plurality of closest temperature rise times which are closest to the current time according to the preset temperature rise times;
and optimizing the temperature rise time obtained based on the temperature regulation time based on the plurality of closest temperature rise times to obtain the optimized temperature rise time.
10. The control device of claim 7, wherein the control module comprises:
the fifth acquisition unit is used for acquiring preset delay time and the inlet water temperature of the water heater;
the first comparison unit is used for comparing the first water temperature with a set target temperature;
a first instruction generating unit, configured to generate a first water temperature control instruction based on the preset delay time if the first water temperature is greater than or equal to the set target temperature;
a second comparing unit, configured to, if the first water temperature is lower than the set target temperature, compare a sum of the intake water temperature and a preset temperature deviation with a magnitude of the first water temperature:
a second instruction generating unit, configured to generate a second water temperature control instruction based on the first water temperature if a sum of the inlet water temperature and the preset temperature deviation is smaller than the first water temperature;
and the third instruction generating unit is used for generating a third water temperature control instruction if the sum of the inlet water temperature and the preset temperature deviation is greater than or equal to the first water temperature.
11. The control device according to claim 10,
the first water temperature control instruction comprises:
waiting for the preset delay time, heating the preset delay time according to the minimum heating power, and then switching to a normal heating mode to execute water temperature control operation;
the second water temperature control command comprises:
after heating the preset delay time according to the heating power generated based on the first water temperature, switching to a normal heating mode to execute the water temperature control operation;
the third water temperature control instruction comprises:
the water temperature control operation is performed in the normal heating mode.
12. The control device of claim 10, wherein the preset delay time is calculated as follows:
acquiring the volume of water in the heating cavity and the current water inlet flow of the water heater;
calculating the preset delay time according to a third calculation rule, wherein the third calculation rule is characterized as follows:
t1＝V/(2*F)；
wherein t1 represents the preset delay time, V represents the volume of water in the heating cavity, and F represents the current water inlet flow.
13. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the method of any one of claims 1 to 6.
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| US5442157A (en) * | 1992-11-06 | 1995-08-15 | Water Heater Innovations, Inc. | Electronic temperature controller for water heaters |
| US10345007B2 (en) * | 2012-09-05 | 2019-07-09 | Ademco Inc. | Method and apparatus for detecting and compensating for sediment build-up in tank-style water heaters |
| US9587855B2 (en) * | 2014-06-04 | 2017-03-07 | Haier Us Appliance Solutions, Inc. | Method for operating a water heater appliance |
| CN104676902B (en) * | 2015-03-11 | 2017-06-30 | 广东美的暖通设备有限公司 | Teat pump boiler and its control method |
| CN106052141B (en) * | 2016-06-28 | 2019-09-03 | 广东美的暖通设备有限公司 | Device is arranged in water heater and its water temperature setting method and water temperature |
| CN110553405B (en) * | 2019-08-19 | 2020-12-11 | 广东万和热能科技有限公司 | Control method, device and equipment of water heater and storage medium |
| CN111503903B (en) * | 2020-04-27 | 2021-05-11 | 广东万家乐燃气具有限公司 | Accurate constant temperature control system and control method for water heater |
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