CN110873456A - Water heater and control method thereof - Google Patents
Water heater and control method thereof Download PDFInfo
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- CN110873456A CN110873456A CN201811016847.3A CN201811016847A CN110873456A CN 110873456 A CN110873456 A CN 110873456A CN 201811016847 A CN201811016847 A CN 201811016847A CN 110873456 A CN110873456 A CN 110873456A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 320
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims description 67
- 230000009286 beneficial effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000013021 overheating Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
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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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a water heater and a control method thereof, wherein the water heater comprises an inner container, a first heating assembly, a second heating assembly and a temperature sensing assembly, wherein the first heating assembly, the second heating assembly and the temperature sensing assembly are arranged in the inner container; the water heater control method comprises the following steps: acquiring an actually measured temperature measured by the temperature sensing assembly; comparing the difference of the actual measurement temperature subtracted from the preset temperature with a first preset temperature difference; when the difference between the preset temperature and the actual measurement temperature is smaller than or equal to a first preset temperature difference, the first heating assembly is controlled to stop heating, and the second heating assembly is controlled to operate and heat. The technical scheme of the invention ensures that the temperature of the hot water produced by the water heater is more uniform, and improves the use experience of the water heater.
Description
Technical Field
The invention relates to the technical field of electric heating, in particular to a water heater and a control method thereof.
Background
In a water heater, a plurality of heating assemblies are usually arranged, so that water in different parts of a liner of the water heater is heated, and the heating efficiency of the water heater is improved. Particularly in the rapid heating mode, all heating components in the water heater are controlled to be turned on, so that the heating is realized together, and the required heating time is shortened. And a temperature sensing component is also arranged in the inner container of the water heater, so that the temperature in the inner container is monitored. The temperature sensing component is usually arranged close to a certain heating component, the temperature sensing component arranged in the way is easily interfered by the heating component nearby the temperature sensing component, when the local temperature nearby the heating component is increased, the temperature sensing component detects the change of the temperature, however, the temperature in the inner container of the water heater is still usually in a very uneven state at the moment, and the temperature of water is still lower at the part far away from the heating component. As described above, in the water heater, the water temperature may not be uniform, and the use experience of the water heater may be deteriorated.
Disclosure of Invention
The invention mainly aims to provide a water heater control method, which aims to solve the technical problem of uneven water temperature in a water heater and improve the use experience of the water heater.
In order to achieve the above object, in the control method of the water heater provided by the present invention, the water heater includes an inner container, and a first heating assembly, a second heating assembly and a temperature sensing assembly which are arranged inside the inner container, wherein the temperature sensing assembly is arranged close to the first heating assembly;
the water heater control method comprises the following steps:
acquiring an actually measured temperature measured by the temperature sensing assembly;
comparing the difference of the actual measurement temperature subtracted from the preset temperature with a first preset temperature difference;
when the difference between the preset temperature and the actual measurement temperature is smaller than or equal to a first preset temperature difference, the first heating assembly is controlled to stop heating, and the second heating assembly is controlled to operate and heat.
Preferably, after the step of obtaining the measured temperature measured by the temperature sensing assembly, the water heater control method further comprises the steps of;
comparing the difference of the preset temperature minus the measured temperature with a second preset temperature difference;
when the difference between the preset temperature and the measured temperature is larger than a second preset temperature difference, controlling the first heating assembly and the second heating assembly to operate and heat;
wherein the second preset temperature difference is greater than or equal to the first preset temperature difference.
Preferably, when the difference between the preset temperature and the measured temperature is smaller than or equal to a first preset temperature difference, the step of controlling the first heating assembly to stop heating and controlling the second heating assembly to operate and heat includes:
comparing the difference of the preset temperature minus the measured temperature with a third preset temperature difference;
when the difference between the preset temperature and the measured temperature is smaller than or equal to a third preset temperature difference, controlling the first heating assembly and the second heating assembly to stop heating;
when the difference between the preset temperature and the measured temperature is larger than a third preset temperature difference, controlling the first heating assembly to stop heating, and controlling the second heating assembly to operate and heat;
wherein the third preset temperature difference is less than the first preset temperature difference.
Preferably, after the step of obtaining the measured temperature measured by the temperature sensing assembly, the water heater control method further comprises the steps of:
calculating the temperature change rate of the change of the measured temperature along with the time according to the measured temperature;
comparing the temperature change rate with a first preset change rate;
when the temperature change rate is smaller than or equal to the first preset change rate, taking the temperature obtained by subtracting a fourth preset temperature difference from the preset temperature as the updated preset temperature;
wherein the fourth predetermined temperature difference is greater than zero.
Preferably, after the step of calculating a temperature change rate of the measured temperature with time based on the measured temperature, the water heater control method further includes the steps of:
comparing the temperature change rate with a second preset change rate;
when the temperature change rate is larger than the second preset change rate, controlling the first heating assembly and the second heating assembly to stop running and generating a dry-burning prompt signal;
wherein the second predetermined rate of change is greater than the first predetermined rate of change.
The invention also provides a water heater, which comprises an inner container, a first heating assembly, a second heating assembly, a temperature sensing assembly, a memory, a processor and a water heater control program which is stored on the memory and can run on the processor, wherein the first heating assembly is arranged in the inner container; the second heating assembly is arranged inside the inner container; the temperature sensing assembly is arranged in the inner container and is close to the first heating assembly; the water heater control program, when executed by the processor, implements steps of a water heater control method comprising the steps of: acquiring an actually measured temperature measured by the temperature sensing assembly; comparing the difference of the actual measurement temperature subtracted from the preset temperature with a first preset temperature difference; when the difference between the preset temperature and the actual measurement temperature is smaller than or equal to a first preset temperature difference, the first heating assembly is controlled to stop heating, and the second heating assembly is controlled to operate and heat.
Preferably, the first heating assembly is arranged in the middle of the liner, the first heating assembly includes a first flange, a first heating pipe and a second heating pipe, a first end of the first heating pipe is connected to the liner through the first flange, the first heating pipe includes a first heating section, a second heating section and a third heating section, the first heating section extends from the first flange to the opposite end of the liner, the second heating section extends from a second end of the first heating section, which is far away from the first flange, to the top of the liner, the third heating section extends from a second end of the second heating section, which is far away from the first heating section, to the opposite end of the liner, and the second end of the third heating section, which is far away from the second heating section, is arranged near the opposite end of the liner; the first end of the second heating pipe is connected to the inner container through the first flange, the second heating pipe comprises a fourth heating pipe section and a fifth heating pipe section, the fourth heating pipe section extends from the first flange to the opposite end of the inner container, and the fifth heating pipe section extends from the second end, far away from the first flange, of the fourth heating pipe section to the first flange in the opposite direction.
Preferably, the temperature sensing assembly is connected to the first flange, and the temperature sensing assembly is disposed between the fourth heating pipe section and the fifth heating pipe section.
Preferably, the second heating assembly is disposed at the bottom of the liner, the second heating assembly includes a second flange and a third heating pipe, a first end of the third heating pipe is connected to the liner through the second flange, the third heating pipe includes a sixth heating pipe section and a seventh heating pipe section, the sixth heating pipe section extends from the second flange to an opposite end of the liner, and the seventh heating pipe section extends from a second end of the sixth heating pipe section, which is away from the second flange, to the second flange in a reverse direction.
Preferably, the water heater further comprises a water outlet pipe and a water inlet pipe, wherein the water outlet pipe is provided with a first opening positioned in the inner container; the water inlet pipe is provided with a second opening positioned in the inner container, and the second opening is arranged below the first opening.
In the technical scheme of the invention, the water heater comprises an inner container, a first heating assembly, a second heating assembly and a temperature sensing assembly, wherein the first heating assembly, the second heating assembly and the temperature sensing assembly are arranged in the inner container; the water heater control method comprises the following steps: acquiring an actually measured temperature measured by a temperature sensing assembly; comparing the difference of the preset temperature minus the measured temperature with a first preset temperature difference; when the difference between the preset temperature and the measured temperature is smaller than or equal to a first preset temperature difference, the first heating assembly is controlled to stop heating, and the second heating assembly is controlled to operate and heat. In this scheme, the temperature in the inner bag of water heater is monitored through the temperature sensing subassembly that is close to first heating element setting, when predetermineeing that the temperature subtracts the difference of actual measurement temperature and is less than or equal to first preset difference in temperature, it indicates that the temperature that is close to first heating element department in the inner bag this moment has been close to the required preset temperature of user, it is inhomogeneous to avoid the temperature in the inner bag, near temperature is too high near first heating element, and other part temperatures are low excessively, the first heating element that control is close to temperature sensing subassembly stops the heating, and the second heating element operation heating of control keeping away from temperature sensing subassembly relatively, through the mode of carrying out local heating to the water in the inner bag, the inhomogeneous problem of temperature in the balanced inner bag, make the heating effect of water heater even, improve the use experience of water heater.
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 structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a water heater according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of a control method for a water heater according to the present invention;
FIG. 3 is a schematic flow chart illustrating a second embodiment of a method for controlling a water heater according to the present invention;
FIG. 4 is a detailed flowchart of step S300 in a third embodiment of the control method for a water heater according to the present invention;
FIG. 5 is a schematic flow chart illustrating a fourth embodiment of a control method for a water heater according to the present invention;
FIG. 6 is a schematic flow chart of a fifth embodiment of a control method for a water heater according to the present invention;
FIG. 7 is a schematic structural view of the first heating assembly and the temperature sensing assembly of FIG. 1;
fig. 8 is a schematic structural view of the second heating assembly in fig. 1.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a water heater control method, which monitors the temperature in an inner container through a temperature sensing assembly and controls the operation of each heating assembly according to the monitoring result of the temperature, so that the water temperature in the inner container of the water heater is uniform, and the use experience of the water heater is improved.
In a first embodiment of the present invention, as shown in fig. 1, the water heater includes an inner container 100, and a first heating assembly 200, a second heating assembly 300 and a temperature sensing assembly 400 which are arranged inside the inner container 100, wherein the temperature sensing assembly 400 is arranged close to the first heating assembly 200;
as shown in fig. 2, the water heater control method includes the following steps:
step S100, acquiring an actually measured temperature measured by the temperature sensing assembly 400;
s200, comparing the difference of the preset temperature minus the measured temperature with a first preset temperature difference;
step S300, when the difference between the preset temperature and the measured temperature is smaller than or equal to a first preset temperature difference, controlling the first heating assembly 200 to stop heating, and controlling the second heating assembly 300 to operate and heat.
The technical solution of the present invention will be described in detail below by taking an electric water heater as an example, and accordingly, the heating component referred to herein is generally an electric heating component. Specifically, the inner container 100 of the water heater is used for storing water to be heated and heated, and can be communicated with the outside through the water outlet pipe 500 and the water inlet pipe 600. A first heating assembly 200 and a second heating assembly 300 are arranged inside the inner container 100 to heat the water in the inner container 100. Through setting up two at least heating element, be favorable to improving heating efficiency on the one hand, on the other hand also is favorable to reducing the degree of difficulty that is located heat transfer between the water of different parts in inner bag 100, improves the homogeneity of heating to a certain extent. In order to monitor the temperature in the inner container 100, a temperature sensing assembly 400 is further disposed inside the inner container 100, and the temperature sensing assembly 400 is disposed near the first heating assembly 200 to measure the temperature in the inner container 100. In a specific example, the first heating element 200 may be disposed at the middle of the inner container 100, and the second heating element 300 may be disposed at the bottom of the inner container 100, so that the temperature sensing element 400 is disposed near the first heating element 200, that is, the temperature sensing element 400 is disposed at the middle of the inner container 100, which is beneficial to improving the accuracy of the detected temperature and reducing the interference of the local water temperature as much as possible. In addition, because the hot water can float upward under the action of buoyancy, in the heating process, heat convection can be generated in the inner container 100, which is also beneficial to further improving the uniformity of heating and the reliability of temperature detection of the temperature sensing assembly 400. The water heater controls the operation of the first heating unit 200 and the second heating unit 300 according to the measured temperature measured by the temperature sensing unit 400, so that the temperature of water in the inner container 100 meets the user's requirement. The preset temperature for controlling heating can be set by a user according to the requirement of the user, and can also be correspondingly read from a memory of the water heater according to the current working mode. When the difference between the preset temperature and the measured temperature is less than or equal to the first preset temperature difference, it indicates that the temperature near the first heating assembly 200 in the liner 100 detected by the temperature sensing assembly 400 is close to the preset temperature required by the user, and the water temperature near the first heating assembly 200 in the liner 100 reaches a level close to the preset temperature without considering the dry-heating of the water heater. However, due to the large volume of the water heater tank 100, the water temperature in other portions away from the first heating assembly 200 is still generally low, and the overall water temperature distribution in the tank 100 is not uniform. On one hand, in order to avoid overheating the water near the first heating assembly 200, which results in excessive temperature and energy waste, and on the other hand, in order to ensure the balance of the overall water temperature distribution in the inner container 100 as much as possible, the first heating assembly 200 is controlled to stop heating, and the second heating assembly 300 is controlled to operate heating. Wherein, the first predetermined difference in temperature can be according to the sensitivity setting of temperature sensing subassembly 400, usually between 0 ~ 3 ℃, and the sensitivity and the degree of accuracy of temperature sensing subassembly 400 are better, and the setting of the first predetermined difference in temperature can be less to improve control effect.
In the present embodiment, the water heater includes an inner container 100, and a first heating assembly 200, a second heating assembly 300 and a temperature sensing assembly 400 which are disposed inside the inner container 100, wherein the temperature sensing assembly 400 is disposed near the first heating assembly 200; the water heater control method comprises the following steps: acquiring an actual temperature measured by the temperature sensing component 400; comparing the difference of the preset temperature minus the measured temperature with a first preset temperature difference; when the difference between the preset temperature and the measured temperature is less than or equal to the first preset temperature difference, the first heating assembly 200 is controlled to stop heating, and the second heating assembly 300 is controlled to operate and heat. In the scheme, the temperature in the inner container 100 of the water heater is monitored through the temperature sensing assembly 400 arranged close to the first heating assembly 200, when the difference between the preset temperature and the measured temperature is smaller than or equal to a first preset temperature difference, it is indicated that the temperature close to the first heating assembly 200 in the inner container 100 at the moment is close to the preset temperature required by a user, in order to avoid uneven temperature in the inner container, namely, the temperature near the first heating assembly 200 is too high, and the temperature of other parts is too low, the first heating assembly 200 close to the temperature sensing assembly 400 is controlled to stop heating, and the second heating assembly 300 relatively far away from the temperature sensing assembly 400 is controlled to run and heat, through the mode of locally heating the water in the inner container 100, the uneven problem of the water temperature in the inner container 100 is balanced, the heating effect of the water heater is uniform, and the use experience of the water heater is improved.
In the second embodiment of the present invention, as shown in fig. 3, after step S100, the water heater control method further includes the steps of;
s400, comparing the difference of the preset temperature minus the measured temperature with a second preset temperature difference;
s500, when the difference between the preset temperature and the measured temperature is larger than a second preset temperature difference, controlling the first heating assembly and the second heating assembly to operate and heat;
wherein the second predetermined temperature difference is greater than or equal to the first predetermined temperature difference.
In this embodiment, when the difference between the preset temperature and the measured temperature is greater than the second preset temperature difference, it indicates that the water temperature in the water heater liner 100 at the current state is a certain difference from the preset temperature required by the user. In this case, in order to improve the heating efficiency and to make the temperature of the water in the inner container 100 reach the preset temperature required by the user as soon as possible, the first and second heating assemblies 200 and 300 are controlled to operate and heat simultaneously. The second preset temperature difference is greater than or equal to the first preset temperature difference, and the value of the second preset temperature difference can be specifically between the first preset temperature difference and 5 ℃.
In the third embodiment of the present invention, as shown in fig. 4, step S300 includes:
step S310, comparing the difference of the preset temperature minus the measured temperature with a third preset temperature difference;
step S320, when the difference between the preset temperature and the measured temperature is less than or equal to a third preset temperature difference, controlling the first heating assembly and the second heating assembly to stop heating;
step S330, when the difference between the preset temperature and the measured temperature is greater than a third preset temperature difference, controlling the first heating assembly to stop heating, and controlling the second heating assembly to operate and heat;
wherein the third predetermined temperature difference is less than the first predetermined temperature difference.
In the present embodiment, it is further considered that the first heating assembly 200 and the second heating assembly 300 may be controlled to stop heating in order to satisfy the user's demand and save energy when the measured temperature has been very close to or even higher than the preset temperature required by the user. Specifically, the stopping of the first and second heating assemblies 200 and 300 is controlled by a third preset temperature difference smaller than the first preset temperature difference. Wherein, the third preset temperature difference can be a negative number, and in consideration of the nonuniformity of the water temperature in the inner container 100, when the temperature sensing assembly 400 detects that the difference between the preset temperature and the measured temperature is greater than the third preset temperature difference, the part far away from the heating assembly in the inner container 100 may still have a lower water temperature, and therefore, the absolute value of the third preset temperature difference can be properly increased to be smaller than zero, so as to ensure the hot water output rate and the output quantity of the water heater.
In the fourth embodiment of the present invention, as shown in fig. 5, after step S100, the water heater control method further includes the steps of:
step S610, calculating a temperature change rate of the measured temperature along with time according to the measured temperature;
step S620, comparing the temperature change rate with a first preset change rate;
step S630, when the temperature change rate is smaller than or equal to the first preset change rate, taking the temperature obtained by subtracting a fourth preset temperature difference from the preset temperature as the updated preset temperature;
wherein the fourth predetermined temperature difference is greater than zero.
In order to keep monitoring the temperature in the liner 100, the temperature sensing assembly 400 obtains the measured temperature in real time or at preset time intervals, so that the temperature change rate can be calculated according to the measured temperature and the time. When the water heater is in different working states, the temperature change rate in the inner container 100 is correspondingly different. Specifically, when the water heater is not discharging water, the water amount in the inner container 100 is not changed, and the water temperature change is smaller, namely, the water temperature change rate is smaller; when the water heater discharges water, hot water in the inner container 100 flows out, and external cold water flows into the inner container 100, which causes the temperature change rate to rise. The temperature change rate is compared with a first preset change rate, wherein the first preset change rate corresponds to the maximum temperature change rate of the water heater in a water discharging state. When the temperature change rate is less than or equal to the first preset change rate, it is indicated that the water heater does not discharge water at this time, in order to save energy, and also ensure that the first heating assembly 200 and the second heating assembly 300 can heat the water in the inner container 100 to the temperature required by the user in a short time when the user needs to use the water, the preset temperature for controlling the operation of the heating assemblies can be properly reduced, and the temperature obtained by subtracting the preset temperature from the fourth preset temperature difference is used as the updated preset temperature, so that the temperature of the water in the inner container 100 is maintained at the lower updated preset temperature. The fourth preset temperature difference is larger than zero, the requirement of the user on rapid heating is higher, the set fourth preset temperature difference is smaller, and correspondingly, the energy consumption of the water heater is also increased.
In the fifth embodiment of the present invention, as shown in fig. 6, after step S610, the water heater control method further includes the steps of:
step S640, comparing the temperature change rate with a second preset change rate;
s650, when the temperature change rate is larger than a second preset change rate, controlling the first heating assembly and the second heating assembly to stop running and generating a dry-burning prompt signal;
wherein the second predetermined rate of change is greater than the first predetermined rate of change.
In this embodiment, when a special condition is considered, that is, when water is not timely supplemented into the inner container 100, the temperature sensing assembly 400 directly contacts with the air in the inner container 100, the detected temperature thereof rapidly rises, and the temperature change rate is large. In order to prevent the potential safety hazard caused by dry combustion of the first heating assembly 200 and the second heating assembly 300 in the inner container 100 under the condition of not supplementing water in time, whether the water heater is in a dry combustion state or not is judged by comparing the temperature change rate with a second preset change rate. When the temperature change rate is greater than the second preset change rate, it indicates that the water amount in the inner container 100 is insufficient or no water exists at the moment, the first heating assembly 200 and the second heating assembly 300 are controlled to stop running, and a dry-fire prompt signal is generated to prompt a user to check the water path of the water heater, so that potential safety hazards are avoided.
The present invention further provides a water heater, as shown in fig. 1, in an embodiment, the water heater includes an inner container 100, a first heating assembly 200, a second heating assembly 300, a temperature sensing assembly 400, a memory (not shown), a processor (not shown), and a water heater control program stored in the memory and operable on the processor, wherein the first heating assembly 200 is disposed inside the inner container; the second heating component 300 is arranged inside the liner; the temperature sensing assembly 400 is disposed inside the liner, and the temperature sensing assembly is disposed near the first heating assembly.
Specifically, the inner container 100 of the water heater is used for storing water to be heated and heated, and can be communicated with the outside through the water outlet pipe 500 and the water inlet pipe 600. A first heating assembly 200 and a second heating assembly 300 are arranged inside the inner container 100 to heat the water in the inner container 100. Through setting up two at least heating element, be favorable to improving heating efficiency on the one hand, on the other hand also is favorable to reducing the degree of difficulty that is located heat transfer between the water of different parts in inner bag 100, improves the homogeneity of heating to a certain extent. In order to monitor the temperature in the inner container 100, a temperature sensing assembly 400 is further disposed inside the inner container 100, and the temperature sensing assembly 400 is disposed near the first heating assembly 200 to measure the temperature in the inner container 100. In a specific example, the first heating element 200 may be disposed at the middle of the inner container 100, and the second heating element 300 may be disposed at the bottom of the inner container 100, so that the temperature sensing element 400 is disposed near the first heating element 200, that is, the temperature sensing element 400 is disposed at the middle of the inner container 100, which is beneficial to improving the accuracy of the detected temperature and reducing the interference of the local water temperature as much as possible. In addition, because the hot water can float upward under the action of buoyancy, in the heating process, heat convection can be generated in the inner container 100, which is also beneficial to further improving the uniformity of heating and the reliability of temperature detection of the temperature sensing assembly 400. The water heater controls the operation of the first heating unit 200 and the second heating unit 300 according to the measured temperature measured by the temperature sensing unit 400, so that the temperature of water in the inner container 100 meets the user's requirement.
Further, as shown in fig. 1 and 7, the first heating assembly 200 is disposed in the middle of the liner 100, and the first heating assembly 200 includes a first flange 210, a first heating pipe 220, and a second heating pipe 230, wherein the first flange 210 is used for connecting the first heating pipe 220 and the second heating pipe 230 to the inner wall of the liner 100, so as to avoid water leakage and the like. A first end of the first heating tube 220 is connected to the inner container 100 by a first flange 210, the first heating tube includes a first heating section 221, a second heating section 222, and a third heating section 223, the first heating section 221 extends from the first flange 210 toward an opposite end of the inner container 100, the second heating section 222 extends from a second end of the first heating section 221 away from the first flange 210 toward a top of the inner container 100, the third heating section 223 extends from a second end of the second heating section 222 away from the first heating section 221 toward an opposite end of the inner container 100, and the second end of the third heating section 223 away from the second heating section 222 is disposed near the opposite end of the inner container 100. The first heating pipe section 221, the second heating pipe section 222 and the third heating pipe section 223 are substantially distributed in the transverse direction of the entire inner container 100, so that the contact area of the first heating pipe 220 and the water in the inner container 100 is effectively increased, which is beneficial to improving the heating efficiency and improving the heating uniformity. A first end of the second heating pipe 230 is connected to the inner container by a first flange 210, the second heating pipe 230 includes a fourth heating pipe section 231 and a fifth heating pipe section 232, the fourth heating pipe section 231 extends from the first flange 210 to an opposite end of the inner container 100, and the fifth heating pipe section 232 extends from a second end of the fourth heating pipe section 231, which is away from the first flange 210, to the first flange in a reverse direction. The second heating pipe 230 is disposed in a U-like shape, which is beneficial to concentrating heat to improve heating efficiency, and the occupied space is small, so as to effectively avoid the damage caused by collision with other components in the first heating pipe 220 or the inner container 110.
As shown in fig. 1, the temperature sensing assembly 400 is coupled to the first flange 210, and the temperature sensing assembly 400 is disposed between the fourth heating segment 231 and the fifth heating segment 232. The temperature sensing assembly 400 is fixed on the inner container 100 through the first flange 210, so that the connection of the temperature sensing assembly 400 is simplified, the first flange 210 is fully utilized, and the raw material cost and the process cost of the water heater are reduced. The temperature sensing assembly 400 is disposed between the fourth heating segment 231 and the fifth heating segment 232 such that the temperature of the water around the temperature sensing assembly 400 is relatively uniform, which helps to improve the accuracy of the temperature detection. The temperature sensing assembly 400 may be a temperature sensing blind pipe.
As shown in fig. 1 and 8, the second heating element 300 is disposed at the bottom of the liner 100, the second heating element 300 includes a second flange 310 and a third heating pipe 320, and a first end of the third heating pipe 320 is connected to the liner 100 through the second flange 310, so as to simplify the installation of the second heating element 300 and prevent the liner 100 from leaking water. The third heating tube 320 includes a sixth heating tube segment 321 and a seventh heating tube segment 322, the sixth heating tube segment 321 extending from the second flange toward the opposite end of the liner, and the seventh heating tube segment 322 extending from the second end of the sixth heating tube segment 321 away from the second flange 310 and back toward the second flange 310. The third heating pipe 320 is disposed in a U-like shape, which is beneficial to concentrating heat to improve heating efficiency, and the occupied space is small, so as to effectively avoid the damage caused by collision with other components in the first heating pipe 220, the second heating pipe 230 or the inner container 110. The second heating assembly 300 is disposed at the bottom of the inner container 100, which is also beneficial to fully utilizing the heat convection effect, so that the water in the inner container 100 is more fully and uniformly heated.
As shown in fig. 1, the water heater further includes a water outlet pipe 500 and a water inlet pipe 600, the water outlet pipe 500 is provided with a first opening located inside the inner container 100; the water inlet pipe 600 is provided with a second opening inside the inner container 100, and the second opening is arranged below the first opening. External cold water is input into the inner container 100 through the water inlet, and hot water generated by heating of the heating assembly in the inner container 100 is discharged through the water outlet. Because cold water density is greater than hot water density, set up the water inlet in the delivery port below, be favorable to promoting the water in inner bag 100 to be fully heated under the heat convection effect, improve the homogeneity of leaving water temperature, avoid hot water to float on inner bag 100 upper portion all the time, cold water sinks in inner bag 100 lower part all the time and causes the waste of leaving water temperature low and energy, improves hot water output rate and output quantity simultaneously, improves the use of water heater and experiences.
Further, the processor may invoke a water heater control program stored on the memory and perform the following operations:
acquiring an actually measured temperature measured by a temperature sensing assembly;
comparing the difference of the preset temperature minus the measured temperature with a first preset temperature difference;
when the difference between the preset temperature and the measured temperature is smaller than or equal to a first preset temperature difference, the first heating assembly is controlled to stop heating, and the second heating assembly is controlled to operate and heat.
The processor can call a water heater control program stored on the memory, and after the operation of acquiring the measured temperature measured by the temperature sensing assembly, the following operation is also executed;
comparing the difference of the preset temperature minus the measured temperature with a second preset temperature difference;
when the difference between the preset temperature and the measured temperature is larger than a second preset temperature difference, controlling the first heating assembly and the second heating assembly to operate and heat;
wherein the second predetermined temperature difference is greater than or equal to the first predetermined temperature difference.
The processor can call the water heater control program stored on the memory, when the difference between the preset temperature and the measured temperature is less than or equal to a first preset temperature difference, the first heating assembly is controlled to stop heating, and the operation of controlling the second heating assembly to run heating comprises the following steps:
comparing the difference of the preset temperature minus the measured temperature with a third preset temperature difference;
when the difference between the preset temperature and the measured temperature is less than or equal to a third preset temperature difference, controlling the first heating assembly and the second heating assembly to stop heating;
when the difference between the preset temperature and the measured temperature is larger than a third preset temperature difference, controlling the first heating assembly to stop heating, and controlling the second heating assembly to operate and heat;
wherein the third predetermined temperature difference is less than the first predetermined temperature difference.
The processor may invoke a water heater control program stored on the memory, and after the operation of obtaining the measured temperature measured by the temperature sensing component, further perform the following operations:
calculating the temperature change rate of the change of the measured temperature along with the time according to the measured temperature;
comparing the temperature change rate with a first preset change rate;
when the temperature change rate is smaller than or equal to the first preset change rate, taking the temperature obtained by subtracting a fourth preset temperature difference from the preset temperature as the updated preset temperature;
wherein the fourth predetermined temperature difference is greater than zero.
The processor may invoke a water heater control program stored on the memory, and after the operation of calculating a temperature change rate of the measured temperature over time based on the measured temperature, further perform the following operations:
comparing the temperature change rate with a second preset change rate;
when the temperature change rate is larger than a second preset change rate, controlling the first heating assembly and the second heating assembly to stop running and generating a dry burning prompt signal;
wherein the second predetermined rate of change is greater than the first predetermined rate of change.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A control method of a water heater is characterized in that the water heater comprises an inner container, a first heating assembly, a second heating assembly and a temperature sensing assembly, wherein the first heating assembly, the second heating assembly and the temperature sensing assembly are arranged in the inner container, and the temperature sensing assembly is arranged close to the first heating assembly;
the water heater control method comprises the following steps:
acquiring an actually measured temperature measured by the temperature sensing assembly;
comparing the difference of the actual measurement temperature subtracted from the preset temperature with a first preset temperature difference;
when the difference between the preset temperature and the actual measurement temperature is smaller than or equal to a first preset temperature difference, the first heating assembly is controlled to stop heating, and the second heating assembly is controlled to operate and heat.
2. The water heater control method as recited in claim 1, wherein after the step of obtaining the measured temperature measured by the temperature sensing assembly, the water heater control method further comprises the steps of;
comparing the difference of the preset temperature minus the measured temperature with a second preset temperature difference;
when the difference between the preset temperature and the measured temperature is larger than a second preset temperature difference, controlling the first heating assembly and the second heating assembly to operate and heat;
wherein the second preset temperature difference is greater than or equal to the first preset temperature difference.
3. The method as claimed in claim 1, wherein when the difference between the preset temperature and the measured temperature is less than or equal to a first preset temperature difference, the step of controlling the first heating assembly to stop heating and the step of controlling the second heating assembly to operate heating comprises:
comparing the difference of the preset temperature minus the measured temperature with a third preset temperature difference;
when the difference between the preset temperature and the measured temperature is smaller than or equal to a third preset temperature difference, controlling the first heating assembly and the second heating assembly to stop heating;
when the difference between the preset temperature and the measured temperature is larger than a third preset temperature difference, controlling the first heating assembly to stop heating, and controlling the second heating assembly to operate and heat;
wherein the third preset temperature difference is less than the first preset temperature difference.
4. The water heater control method as recited in any one of claims 1 to 3, further comprising, after the step of obtaining the measured temperature measured by the temperature sensing assembly, the steps of:
calculating the temperature change rate of the change of the measured temperature along with the time according to the measured temperature;
comparing the temperature change rate with a first preset change rate;
when the temperature change rate is smaller than or equal to the first preset change rate, taking the temperature obtained by subtracting a fourth preset temperature difference from the preset temperature as the updated preset temperature;
wherein the fourth predetermined temperature difference is greater than zero.
5. The water heater control method as recited in claim 4, further comprising, after the step of calculating a temperature change rate of the measured temperature with time based on the measured temperature, the step of:
comparing the temperature change rate with a second preset change rate;
when the temperature change rate is larger than the second preset change rate, controlling the first heating assembly and the second heating assembly to stop running and generating a dry-burning prompt signal;
wherein the second predetermined rate of change is greater than the first predetermined rate of change.
6. A water heater comprising a bladder, a first heating assembly, a second heating assembly, a temperature sensing assembly, a memory, a processor, and a water heater control program stored on the memory and executable on the processor, wherein,
the first heating assembly is arranged inside the inner container;
the second heating assembly is arranged inside the inner container;
the temperature sensing assembly is arranged in the inner container and is close to the first heating assembly;
the water heater control program when executed by the processor implements the steps of the water heater control method of any one of claims 1 to 5.
7. The water heater of claim 6, wherein the first heating assembly is disposed in the middle of the inner container, and the first heating assembly comprises:
a first flange;
a first heating pipe, a first end of which is connected to the inner container through the first flange, the first heating pipe comprising a first heating section, a second heating section and a third heating section, the first heating section extending from the first flange to an opposite end of the inner container, the second heating section extending from a second end of the first heating section away from the first flange to a top of the inner container, the third heating section extending from a second end of the second heating section away from the first heating section to an opposite end of the inner container, the second end of the third heating section away from the second heating section being disposed near the opposite end of the inner container;
the first end of the second heating pipe is connected to the inner container through the first flange, the second heating pipe comprises a fourth heating pipe section and a fifth heating pipe section, the fourth heating pipe section extends from the first flange to the opposite end of the inner container, and the fifth heating pipe section extends from the second end, far away from the first flange, of the fourth heating pipe section to the first flange in the opposite direction.
8. The water heater as recited in claim 7 wherein said temperature sensing assembly is coupled to said first flange, said temperature sensing assembly being disposed between said fourth heating section and said fifth heating section.
9. The water heater of claim 6, wherein the second heating assembly is disposed at the bottom of the inner container, and the second heating assembly comprises:
a second flange;
a third heating pipe, a first end of which is connected to the inner container through the second flange, the third heating pipe including a sixth heating pipe section and a seventh heating pipe section, the sixth heating pipe section extending from the second flange to an opposite end of the inner container, the seventh heating pipe section extending from a second end of the sixth heating pipe section away from the second flange in a direction opposite to the second flange.
10. The water heater as recited in claim 6, further comprising:
the water outlet pipe is provided with a first opening positioned in the inner container;
the water inlet pipe is provided with a second opening located inside the inner container, and the second opening is arranged below the first opening.
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