CN117167982A - Water heater control method, control device, equipment and computer readable storage medium - Google Patents
Water heater control method, control device, equipment and computer readable storage medium Download PDFInfo
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- CN117167982A CN117167982A CN202311123365.9A CN202311123365A CN117167982A CN 117167982 A CN117167982 A CN 117167982A CN 202311123365 A CN202311123365 A CN 202311123365A CN 117167982 A CN117167982 A CN 117167982A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 486
- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000003860 storage Methods 0.000 title claims abstract description 18
- 238000012937 correction Methods 0.000 claims description 54
- 238000005485 electric heating Methods 0.000 claims description 42
- 238000010438 heat treatment Methods 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000012935 Averaging Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 19
- 239000003507 refrigerant Substances 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
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- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
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- 239000008236 heating water Substances 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
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Abstract
The application discloses a water heater control method, a control device, equipment and a computer readable storage medium, wherein the water heater control method comprises the following steps: acquiring a set water temperature and a heat pump stop temperature; under the condition that the set water temperature is larger than the heat pump stop temperature, determining a difference temperature according to the set water temperature and the heat pump stop temperature; determining an adjusting value according to the difference temperature, and determining the current water temperature according to the temperature of the lower area of the water tank, the temperature of the upper area of the water tank and the adjusting value; under the condition that the current water temperature reaches the set water temperature, controlling the heat pump water heater to be in a standby state; the embodiment of the application can improve the operation control precision of the heat pump water heater in a high water temperature range.
Description
Technical Field
The present application relates to the field of water heater technologies, and in particular, to a water heater control method, a control device, a device, and a computer readable storage medium.
Background
Along with the continuous development of economy and continuous progress of technology, the living standard of people is continuously improved. Heat pump water heater is popular because it has the characteristics of energy saving, environmental protection, etc. In an integral heat pump water heater, an electric heating pipe is generally arranged, and the electric heating pipe is mainly heated by heat pump operation and is assisted by heating; when the set water temperature set by a user is higher, the heat pump system is stopped after being heated to the heat pump stopping temperature, and the difference between the set water temperature and the heat pump stopping temperature is generally met by continuing to heat by the electric heating pipe; however, since the electric heating pipe of the water tank is generally installed in the lower area of the water tank, when the electric heating pipe is electrified and heated, the temperature of the lower area of the water tank is obviously raised, and after the heat pump system is stopped, the temperature of the upper area of the water tank is obviously lower than that of the lower area of the water tank, and the electric heating relay operation in the high water temperature zone is generally judged by the temperature of the upper area of the water tank, thus the stop temperature deviation of the heat pump water heater caused by the electric heating operation in the high water temperature zone is caused.
Disclosure of Invention
The embodiment of the application provides a water heater control method, a control device, equipment and a computer readable storage medium, which improve the operation control precision of a heat pump water heater in a high water temperature range.
An embodiment of a first aspect of the present application provides a water heater control method, applied to a heat pump water heater, including:
acquiring a set water temperature and a heat pump stop temperature;
determining a difference temperature according to the set water temperature and the heat pump stop temperature under the condition that the set water temperature is larger than the heat pump stop temperature;
determining an adjusting value according to the difference temperature, and determining the current water temperature according to the temperature of the lower area of the water tank, the temperature of the upper area of the water tank and the adjusting value;
and controlling the heat pump water heater to be in a standby state under the condition that the current water temperature reaches the set water temperature.
The water heater control method according to the embodiment of the first aspect of the application has at least the following beneficial effects: in the process of controlling the water heater, firstly acquiring a set water temperature and a heat pump stop temperature, and then determining a difference value temperature according to the set water temperature and the heat pump stop temperature under the condition that the set water temperature is larger than the heat pump stop temperature; then determining an adjusting value according to the difference temperature, and determining the current water temperature according to the temperature of the lower area of the water tank, the temperature of the upper area of the water tank and the adjusting value; finally, under the condition that the current water temperature reaches the set water temperature, the heat pump water heater can be controlled to be in a standby state. Through the technical scheme, the shutdown water temperature is adjusted and corrected based on the adjusting value, the operation control precision of the heat pump water heater in a high water temperature interval is improved, and the stop temperature deviation is well prevented.
In some embodiments, the heat pump water heater further comprises a heat pump system and an electric heating device for heating the water tank, the method further comprising, before determining the adjustment value based on the differential temperature:
and controlling the heat pump system to stop and performing heating treatment on the water tank by using the electric heating device under the condition that the temperature of the lower area of the water tank reaches the stop temperature of the heat pump.
In some embodiments, the determining the current water temperature from the tank lower region temperature, the tank upper region temperature, and the adjustment value comprises:
averaging the temperature of the lower area of the water tank and the temperature of the upper area of the water tank to obtain the average temperature of the water tank;
determining a water tank reference temperature according to the average water tank temperature and the adjustment value;
and determining the current water temperature according to the reference temperature of the water tank and the temperature of the upper area of the water tank.
In some embodiments, the determining the adjustment value based on the differential temperature includes:
determining the regulating value as a first regulating value under the condition that the difference temperature is smaller than a preset first judging threshold value;
determining the regulating value as a second regulating value under the condition that the difference temperature is larger than or equal to the first judging threshold value and smaller than a preset second judging threshold value;
And determining the adjustment value as a third adjustment value in the case where the difference temperature is greater than the first determination threshold and greater than or equal to the second determination threshold.
In some embodiments, the determining the current water temperature from the tank reference temperature and the tank upper region temperature comprises:
and selecting a larger value from the reference temperature of the water tank and the temperature of the upper area of the water tank as the current water temperature.
In some embodiments, after the determining the difference temperature from the set water temperature and the heat pump shutdown temperature, the method further comprises:
determining a correction value based on the difference temperature;
determining a lower tank area corrected temperature according to the lower tank area temperature and the corrected value;
and determining a panel display temperature according to the correction temperature of the lower area of the water tank and the temperature of the upper area of the water tank.
In some embodiments, said determining a correction value based on said difference temperature comprises:
determining the correction value as a first correction value under the condition that the difference temperature is smaller than a preset third judgment threshold value;
determining the correction value as a second correction value when the difference temperature is greater than or equal to the third judgment threshold value and less than a preset fourth judgment threshold value;
And determining the correction value as a third correction value in the case where the difference temperature is greater than the third determination threshold and greater than or equal to the fourth determination threshold.
In some embodiments, the determining a panel display temperature from the tank lower region correction temperature and the tank upper region temperature includes:
and adding a preset compensation value to the larger value of the correction temperature of the lower area of the water tank and the adjustment temperature of the upper part of the water tank to obtain the panel display temperature.
An embodiment of the second aspect of the present application provides a control apparatus including a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the water heater control method as described above when executing the computer program.
An embodiment of the third aspect of the present application provides a heat pump water heating apparatus comprising a water tank, a first temperature sensor for detecting the temperature of an upper region of the water tank, and a second temperature sensor for detecting the temperature of a lower region of the water tank, and a control device as described above, both the first temperature sensor and the second temperature sensor being connected to the control device.
In some embodiments, the heat pump water heating apparatus further comprises a heat pump system and an electric heating device for heating the water tank, both of which are connected to the control device.
In some embodiments, the heat pump system comprises a compressor, a heat exchanger, a throttle mechanism, an evaporator and a four-way valve, wherein the compressor is respectively connected with the heat exchanger and the evaporator through the four-way valve, the heat exchanger, the throttle mechanism and the evaporator are sequentially connected, and the four-way valve is connected with the control device.
An embodiment of a fourth aspect of the present application provides a computer-readable storage medium storing computer-executable instructions for performing the water heater control method as described above.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a schematic diagram of a heat pump water heater according to an embodiment of the present application;
FIG. 2 is a flow chart of a water heater control method provided by an embodiment of the present application;
FIG. 3 is a flow chart of a water heater control method according to another embodiment of the present application;
FIG. 4 is a specific flow chart for determining the current water temperature provided by an embodiment of the present application;
FIG. 5 is a specific flow chart for determining adjustment values provided by an embodiment of the present application;
FIG. 6 is a detailed flow chart of determining a current water temperature provided by another embodiment of the present application;
FIG. 7 is a flow chart of a water heater control method according to another embodiment of the present application;
FIG. 8 is a flowchart showing a specific procedure for determining correction values according to an embodiment of the present application;
FIG. 9 is a specific flow chart for determining the display temperature of a panel according to an embodiment of the present application;
FIG. 10 is a flowchart of a water heater control method according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a control device according to an embodiment of the present application.
Reference numerals:
compressor 100, four-way valve 200, water tank 300, water inlet pipe 310, water outlet pipe 320, heat exchanger 400, first temperature sensor 510, second temperature sensor 520, electric heating device 600, evaporator 700, third temperature sensor 710, fourth temperature sensor 720, throttle device 800, fan 900, water heater control system 1000, control device 1100, processor 1110, and memory 1120.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
In the description of the present application, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.
Along with the continuous development of economy and continuous progress of technology, the living standard of people is continuously improved. Heat pump water heater is popular because it has the characteristics of energy saving, environmental protection, etc. In an integral heat pump water heater, an electric heating pipe is generally arranged, and the electric heating pipe is mainly heated by heat pump operation and is assisted by heating; when the set water temperature set by a user is higher, the heat pump system is stopped after being heated to the heat pump stopping temperature, and the difference between the set water temperature and the heat pump stopping temperature is generally met by continuing to heat by the electric heating pipe; however, since the electric heating pipe of the water tank is generally installed in the lower area of the water tank, when the electric heating pipe is electrified and heated, the temperature of the lower area of the water tank is obviously raised, and after the heat pump system is stopped, the temperature of the upper area of the water tank is obviously lower than that of the lower area of the water tank, and the electric heating relay operation in the high water temperature zone is generally judged by the temperature of the upper area of the water tank, thus the stop temperature deviation of the heat pump water heater caused by the electric heating operation in the high water temperature zone is caused.
Based on the above, the embodiment of the application provides a water heater control method, a control device, equipment and a computer readable storage medium, which improve the operation control precision of a heat pump water heater in a high water temperature range.
The following description is made with reference to the accompanying drawings:
referring to fig. 1, fig. 1 is a schematic structural diagram of a heat pump water heater according to an embodiment of the first aspect of the present application.
In the example of fig. 1, the heat pump water heater includes a water tank 300, a first temperature sensor 510 for detecting the temperature of an upper region of the water tank 300 is provided at an upper portion of the water tank 300, and a second temperature sensor 520 for detecting the temperature of a lower region of the water tank 300 is provided at a lower portion of the water tank 300; the heat pump water heater further comprises a heat pump system which can heat the water stored in the water tank 300 during the operation process; and the electric heating device 600 is further provided on the water tank 300, and in case the heat pump system stops heating the water tank 300, further heating treatment of the water in the water tank 300 can be performed by using the electric heating device 600. For example, a set water temperature and a heat pump stop temperature may be set for the heat pump water heater, where the set water temperature is a temperature at which a user desires the water in the water tank 300 to reach, and the heat pump stop temperature is a highest temperature at which the water in the water tank 300 can be heated by the heat pump system, where the set water temperature is greater than the heat pump stop temperature, the heat pump system is always used in the early stage of heating the water in the water tank 300, where the heat pump system stops working when the water in the water tank 300 reaches the heat pump stop temperature, and the electric heating device 600 on the water tank 300 can perform further heating treatment on the water in the water tank 300, so that the water in the water tank 300 can continue to perform the heating treatment until the water temperature reaches the set water temperature. The water tank 300 is further provided with a water inlet pipe 310 and a water outlet pipe 320, cold water can be injected into the water tank 300 through the water inlet pipe 310, and hot water in the water tank 300 can be discharged through the water outlet pipe 320.
Wherein the heat pump system comprises an evaporator 700, a third temperature sensor 710, a fourth temperature sensor 720 and a fan 900; a third temperature sensor 710 is disposed within the evaporator 700, the third temperature sensor 710 being capable of detecting a coil temperature of the evaporator 700; the fourth temperature sensor 720 is disposed at the outer side of the evaporator 700, and is used for detecting the ambient temperature of the environment where the whole heat pump water heater is located; the fan 900 is arranged at one side of the evaporator 700, and the fan 900 can assist the evaporator 700 to dissipate heat when being started, so that the efficiency of hot water preparation is improved. The fan 900 can accelerate the heat dissipation efficiency of the evaporator 700 during operation, so that the temperature of the evaporator 700 is low, and when the temperature of the surface of the evaporator 700 is lower than the dew point temperature of the environment, the surface of the evaporator 700 is easy to frost.
The heat pump water heater further comprises a compressor 100, a four-way valve 200, a heat exchanger 400 and a throttling device 800, wherein the compressor 100 is connected with the heat exchanger 400 through the four-way valve 200, the compressor 100 is also connected with an evaporator 700 through the four-way valve 200, the evaporator 700, the throttling device 800 and the heat exchanger 400 are sequentially connected, a water tank 300 is arranged on one side of the heat exchanger 400, the water tank 300 heats up through the heat exchanger 400 to prepare hot water, and the evaporator 700 is generally arranged outdoors and used for exchanging heat with the outside. In the process of preparing hot water, the compressor 100 may compress a low-temperature low-pressure gaseous refrigerant to obtain a high-temperature high-pressure gas, then control the four-way valve 200 to enable the high-temperature high-pressure gas to enter the heat exchanger 400 at one side of the water tank 300, and as the heat exchanger 400 contacts with the inner container of the water tank 300, the high-temperature high-pressure gas will transfer heat to the water of the water tank 300 to achieve the heating effect, a low-temperature high-pressure liquid refrigerant is formed after heat exchange treatment by the heat exchanger 400, then control the throttling device 800 to enable the refrigerant entering the evaporator 700 to be in a low-temperature low-pressure liquid state, and then evaporate the evaporator 700 to enable the liquid refrigerant to be changed into a low-temperature low-pressure gas state to enter the compressor 100 again for compression treatment, so as to form a heating cycle. In the refrigerating process, the compressor 100 can compress the low-temperature low-pressure gaseous refrigerant to obtain high-temperature high-pressure gas, then the four-way valve 200 is controlled to enable the high-temperature high-pressure gas to enter one side of the evaporator 700, so that frost formed on the evaporator 700 can be heated and melted, then the high-pressure low-temperature refrigerant enters the heat exchanger 400 on one side of the water tank 300 through the throttling device 800, is vaporized in the heat exchanger 400, absorbs heat of water in the water tank 300 to form low-temperature low-pressure gas, and reenters the compressor 100 to form a refrigerating cycle. In summary, the switching between cooling and heating can be realized only by adjusting and controlling the four-way valve 200, and the whole process is simple, convenient and quick. The throttle device 800 may be an expansion valve, and the expansion valve mainly includes a thermal expansion valve, an electromagnetic expansion valve, and an electronic expansion valve.
The heat pump water heater also comprises a water heater control system 1000, wherein the water heater control system 1000 is arranged in the heat pump water heater, related control instructions can be issued to the heat pump water heater through the heat pump water heater, and a self-cleaning function can be issued to the heat pump water heater through the water heater control system 1000 by way of example. The implementation manner of the self-cleaning function can be as follows: the heat pump water heater removes frost from air passing through the evaporator 700 by lowering the gear of the blower 900 to lower the evaporation temperature, and after the defrosting condition is reached, the heat pump water heater removes frost, the frost layer is heated to become water when defrosting, and the water flows under the influence of gravity, so that dust and dirt on the fins of the evaporator 700 can be cleaned. And the water heater control system 1000 can set the water temperature, so that the user can set the temperature according to the self requirement, and the whole process is simple, convenient and quick. The heat pump water heater further comprises a water heater control system 1000, wherein the water heater control system 1000 can collect relevant parameters of the heat pump water heater, and then control the heat pump water heater according to the received relevant parameters, and when the temperature of the water tank 300 is detected to reach the stop temperature of the heat pump but not reach the set water temperature, the electric heating device 600 can be used for heating the water in the water tank 300 until the water temperature in the water tank 300 reaches the set water temperature under the condition that the heat pump system stops working.
The heat pump water heater described in the embodiments of the present application is for more clearly explaining the technical solution of the embodiments of the present application, and does not constitute a limitation to the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the heat pump water heater and the appearance of a new application scenario, the technical solution provided in the embodiments of the present application is equally applicable to similar technical problems.
It will be appreciated by those skilled in the art that the configuration of the heat pump water heater shown in fig. 1 is not limiting of the embodiments of the application and may include more or fewer components than shown, or may be combined with certain components, or a different arrangement of components.
Based on the structure of the heat pump water heater, various embodiments of the water heater control method according to the embodiments of the present application are provided.
Referring to fig. 2, fig. 2 is a flowchart of a water heater control method according to an embodiment of the present application, which can be applied to the heat pump water heater shown in fig. 1, including, but not limited to, the following steps:
step S100, acquiring a set water temperature and a heat pump stop temperature;
step S200, determining a difference temperature according to the set water temperature and the heat pump stop temperature under the condition that the set water temperature is larger than the heat pump stop temperature;
Step S300, determining an adjusting value according to the difference temperature, and determining the current water temperature according to the temperature of the lower area of the water tank, the temperature of the upper area of the water tank and the adjusting value;
step S400, when the current water temperature reaches the set water temperature, the heat pump water heater is controlled to be in a standby state.
The set water temperature in the embodiment of the application is the temperature set by the user, namely the temperature of water which the user wants to reach, and in the process of bathing, the user can set the set water temperature to be 50 ℃ at the moment when the user wants the water temperature to reach 50 ℃ by way of example; the shutdown temperature of the heat pump is the highest temperature that the heat pump system can enable water in the water tank to reach, and the temperature is related to the performance of the heat pump system; when the set water temperature set by the user is larger than the heat pump stop temperature, the heat pump system stops working when the water temperature in the water tank reaches the heat pump stop temperature under the action of the heat pump system, and then the electric heating device in the heat pump water heater further heats the water in the water tank, so that the water in the water tank can reach the set water temperature to meet the water demand of the user.
It is worth noting that the application mainly carries out the selection treatment on the adjustment value according to the difference temperature, and prepares for the subsequent shutdown temperature adjustment and correction, so that the water temperature control process of the high temperature area can be more reasonable, and the situation of water temperature deviation is well avoided; and in the process of determining the current water temperature, the adjustment value is also considered, so that the determination of the current water temperature can be more accurate.
It is noted that when the set water temperature is greater than the heat pump stop temperature, the difference operation is performed between the set water temperature and the heat pump stop temperature to find the difference value between the set water temperature and the heat pump stop temperature, which is the difference value temperature mentioned in the embodiment of the application; the difference temperature and the temperature threshold are then compared and a subsequent warm-up shutdown operation is determined based on a comparison of the two. In the heating shutdown operation process of the embodiment of the application, the current water temperature is obtained according to the temperature of the upper area of the water tank and the temperature of the lower area of the water tank; in the process of heating water in the water tank by utilizing the electric heating device, the current water temperature also changes, and when the current water temperature rises to be equal to the set water temperature, the heat pump water heater is in a stop or standby state. The standby state is that the heat pump water heater is in an on state but does not perform any substantial work, and can immediately enter the working state without restarting later.
It is worth noting that, in the conventional integral heat pump water heater, a water tank electric heating pipe is generally provided, namely the electric heating device mentioned in the embodiment of the application, in the ordinary hot water preparation process, the operation heating of a heat pump system is taken as a main means, and when the set water temperature is greater than the shutdown temperature of the heat pump, the electric heating pipe is used for further heating the water in the water tank; the electric heating pipe of the water tank is generally arranged in the lower area of the water tank, the temperature of the lower area of the water tank can rise relatively quickly when the electric heating pipe is electrified to heat the water tank, and the temperature of the upper area of the water tank can be obviously lower than the temperature of the lower area of the water tank after the heat pump system is stopped; in addition, the heat pump water heater generally displays the real-time temperature of the water tank on the control panel, namely the display temperature, wherein the display temperature is generally a larger value of the temperature of the lower area of the water tank and the temperature of the upper area of the water tank, and the larger value is added with one to be used as the display temperature; the temperature of the lower region of the tank is 36 c and the temperature of the upper region of the tank is 34 c, the temperature is shown to be 37 c. For a heat pump water heater comprising two temperature sensors, the operation of a heat pump system is generally based on the temperature of the lower area of a water tank, and the temperature of the upper area of the water tank is often used as the basis in the electric heating relay process of a high water temperature zone; and the high water temperature interval mentioned in the embodiments of the present application generally refers to the water tank temperature exceeding 55 ℃ and later.
It should be noted that the current water temperature will change along with the heating of the water tank by the electric heating device, when the current water temperature gradually increases to be equal to the set water temperature, the temperature of the water in the water tank is determined to reach the set water temperature, and the water temperature can meet the requirements of users, so that the heat pump water heater can be switched from the running state of the electric heating device to the standby state, and is ready for the subsequent switching of the working state.
It is noted that when the set water temperature is less than the stop temperature of the heat pump, the water temperature of the water tank rises in the working process of the heat pump system, and when the water temperature of the water tank reaches the set water temperature, the whole heat pump water heater stops working and is converted into a standby state from a hot water preparation state.
Referring to fig. 3, before step S300 is performed, step S210 may be further included, but is not limited thereto.
Step S210, controlling the heat pump system to stop and performing heating treatment on the water tank by using the electric heating device in the case that the temperature of the lower region of the water tank reaches the stop temperature of the heat pump.
When the set water temperature is higher than the heat pump stop temperature, the heat pump system is used for heating the water in the water tank in the process of heating the water in the water tank, and the heat pump system is based on the temperature of the lower area of the water tank, so that when the temperature of the lower area of the water tank reaches the heat pump stop temperature of the heat pump water heater, the heat pump system enters a stop waiting state according to a preset working strategy, and then the electric heating device immediately takes over the heat pump system to continuously heat the water in the water tank, so that the water in the water tank can reach the set water temperature.
Notably, the entire heating process can be controlled by a water heater control system; when the water temperature in the water tank reaches the stop temperature of the heat pump, the water heater control system acquires the water temperature information, then controls the whole heat pump system to be in a stop state, and then controls the electric heating device to continuously heat the water in the water tank so that the water in the water tank can be heated to the set water temperature.
Referring to fig. 4, the above-described step S300 may include, but is not limited to, steps S310 to S330.
Step S310, averaging the temperature of the lower area of the water tank and the temperature of the upper area of the water tank to obtain the average temperature of the water tank;
step S320, determining a reference temperature of the water tank according to the average temperature of the water tank and the adjustment value;
step S330, determining the current water temperature according to the tank reference temperature and the tank upper region temperature.
In the embodiment of the application, in the process of determining the current water temperature, firstly, the temperature of the lower area of the water tank and the temperature of the upper area of the water tank are added, then the average value of the temperature of the lower area of the water tank and the temperature of the upper area of the water tank are obtained, and the average value of the temperature of the lower area of the water tank and the temperature of the upper area of the water tank is taken as the average temperature of the water tank; then subtracting the regulating value from the average temperature of the water tank to obtain the reference temperature of the water tank; and finally, selecting a larger value from the reference temperature of the water tank and the temperature of the upper area of the water tank as the current water temperature.
It is worth noting that the larger value is selected from the water tank reference temperature and the water tank upper region temperature to serve as the current water temperature, so that the heating control process of the high water temperature interval can be more reasonable, the temperature of the water tank upper region can not be just according to the water tank upper region temperature like before, the water tank upper region temperature, the water tank lower region temperature and the regulating value are specifically considered, the difference value temperature can be based in the regulating value determining process, and the current water tank temperature determining process can be more accurate and reasonable.
It is worth noting that the temperature of the lower area of the water tank is the temperature of the water in the lower area of the water tank, the temperature of the upper area of the water tank is the temperature of the water in the upper area of the water tank, and in the process of controlling the electric heating device in the past, the temperature of the upper area of the water tank is always only determined according to the temperature of the upper area of the water tank.
Referring to fig. 5, the above step S300 may include, but is not limited to, steps S340 to S360.
Step S340, determining the adjustment value as a first adjustment value under the condition that the difference temperature is smaller than a preset first judgment threshold value;
step S350, determining the adjustment value as a second adjustment value when the difference temperature is greater than or equal to the first judgment threshold value and less than a preset second judgment threshold value;
in step S360, in the case where the difference temperature is greater than the first judgment threshold value and greater than or equal to the second judgment threshold value, the adjustment value is determined as a third adjustment value.
In the embodiment of the application, when the difference temperature is smaller than the first judgment threshold value, a larger value can be selected from the average temperature of the water tank and the temperature of the upper area of the water tank as the current water temperature, and the first regulation value is 0; when the difference temperature is not smaller than the first judgment threshold value but smaller than the second judgment threshold value, subtracting a preset second regulation value from the average temperature of the water tank to obtain a first water tank reference temperature, and selecting a larger value from the first water tank reference temperature and the temperature of the upper area of the water tank as the current water temperature; when the difference temperature is not smaller than the first judgment threshold value and the second judgment threshold value, subtracting a preset third regulation value from the average temperature of the water tank to obtain a second water tank reference temperature, and selecting a larger value from the second water tank reference temperature and the temperature of the upper area of the water tank as the current water temperature.
It is noted that the adjustment value is determined according to the comparison between the difference temperature and the first and second judgment thresholds, and is prepared for the subsequent determination of the current water temperature. For example, if the first judgment threshold is 5, the second judgment threshold is 10, and the difference temperature is 2, the adjustment value is determined as the first adjustment value; if the difference temperature is 7, the adjustment value is determined to be a second adjustment value; if the difference temperature is 11, the adjustment value is determined to be a third adjustment value. And then, the current water temperature can be adjusted and determined according to the corresponding adjusting value, so that the real-time water temperature can be determined more accurately.
Referring to fig. 6, the step S330 may include, but is not limited to, step S331.
Step S331, selecting a larger value from the tank reference temperature and the tank upper region temperature as the current water temperature.
In the embodiment of the application, when the difference temperature is smaller than the first judgment threshold value, a larger value can be selected from the average temperature of the water tank and the temperature of the upper area of the water tank as the current water temperature, and the first regulation value is zero at the moment; when the difference temperature is not smaller than the first judgment threshold value but smaller than the second judgment threshold value, subtracting the second regulation value from the average temperature of the water tank to obtain a first water tank reference temperature, and selecting a larger value from the first water tank reference temperature and the temperature of the upper area of the water tank as the current water temperature; when the difference temperature is not smaller than the first judgment threshold value and the second judgment threshold value, the third adjustment value is subtracted from the average temperature of the water tank to obtain a second water tank reference temperature, and a larger value is selected from the second water tank reference temperature and the temperature of the upper area of the water tank to serve as the current water temperature.
It is worth noting that the reference temperature of the water tank is compared with the temperature of the upper area of the water tank, and the larger value of the reference temperature of the water tank and the temperature of the upper area of the water tank is used as the current water temperature, so that the water temperature in the water tank can be determined more reasonably, the water temperature can not be determined more accurately only according to the temperature of the upper area of the water tank.
Referring to fig. 7, steps S510 to S530 may be further included, but are not limited to, after the above-described step S200 is performed.
Step S510, determining a correction value according to the difference temperature;
step S520, determining the correction temperature of the lower area of the water tank according to the temperature of the lower area of the water tank and the correction value;
step S530, determining the panel display temperature according to the correction temperature of the lower area of the water tank and the temperature of the upper area of the water tank.
In the embodiment of the application, the correction value can be selected according to the difference temperature; and subtracting the corresponding correction value from the temperature of the lower area of the water tank to obtain the correction temperature of the lower area of the water tank, and finally selecting a larger value from the temperature of the lower area of the water tank and the temperature of the upper area of the water tank as the panel display temperature, so that the panel display temperature can better reflect the current temperature condition of the water tank.
It should be noted that, the conventional panel display temperature is generally a display value obtained by selecting a larger value from the upper region temperature of the water tank and the lower region temperature of the water tank, and adding a compensation value to the larger value; however, this panel display mode cannot reflect the water temperature condition in the water tank more accurately, so that the temperature of the lower area of the water tank needs to be corrected and adjusted based on the correction value, so that the panel display temperature can reflect the current water tank temperature more accurately. Among them, since the electric heating device is located below the water tank, it is necessary to perform correction adjustment processing for the temperature of the lower region of the water tank.
Referring to fig. 8, the above-described step S510 may include, but is not limited to, step S511 to step S513.
Step S511, determining the correction value as a first correction value when the difference temperature is smaller than a preset third judgment threshold value;
step S512, determining the correction value as a second correction value when the difference temperature is larger than or equal to the third judgment threshold value and smaller than a preset fourth judgment threshold value;
in step S513, in the case where the difference temperature is greater than the third determination threshold and greater than or equal to the fourth determination threshold, the correction value is determined as the third correction value.
In the embodiment of the application, when the difference temperature is smaller than the first judgment threshold value, the first correction value is subtracted from the temperature of the lower area of the water tank to obtain the corrected temperature of the lower area of the first water tank, then a larger value is selected from the corrected temperature of the lower area of the first water tank and the temperature of the upper area of the water tank, and the larger value is added with the compensation value to obtain the panel display temperature; when the difference temperature is not less than the first judgment threshold value but less than the second judgment threshold value, the second correction value is subtracted from the temperature of the lower area of the water tank to obtain the corrected temperature of the lower area of the water tank, then a larger value is selected from the corrected temperature of the lower area of the water tank and the temperature of the upper area of the water tank, and the larger value is added with the compensation value to obtain the panel display temperature; when the difference temperature is not less than the first judgment threshold value and the second judgment threshold value, the third correction value is subtracted from the temperature of the lower area of the water tank to obtain the corrected temperature of the lower area of the water tank, then a larger value is selected from the corrected temperature of the lower area of the water tank and the temperature of the upper area of the water tank, and the larger value is added with the compensation value to obtain the panel display temperature.
It is noted that the correction value is determined according to the comparison of the difference temperature with the first judgment threshold and the second judgment threshold, and preparation is made for the subsequent determination of the current water temperature. Illustratively, if the first judgment threshold is 5, the second judgment threshold is 10, and the difference temperature is 2, the correction value is determined as the first correction value; if the difference temperature is 7, the correction value is determined as a second correction value; if the difference temperature is 11, the correction value is determined as a third correction value. And then, the current water temperature can be adjusted and determined according to the corresponding correction value, so that the real-time water temperature determination can be more accurate.
Referring to fig. 9, the above step S530 may include, but is not limited to, step S531.
And step S531, adding a preset compensation value to the larger value of the correction temperature of the lower area of the water tank and the adjustment temperature of the upper part of the water tank to obtain the panel display temperature.
In the embodiment of the application, when the difference temperature is smaller than the first judgment threshold value, the first correction value can be subtracted from the temperature of the lower area of the water tank to obtain the corrected temperature of the lower area of the first water tank, then a larger value is selected from the corrected temperature of the lower area of the first water tank and the temperature of the upper area of the water tank, and the larger value is added with the compensation value to obtain the panel display temperature; when the difference temperature is not less than the first judgment threshold value but less than the second judgment threshold value, the second correction value is subtracted from the temperature of the lower area of the water tank to obtain the corrected temperature of the lower area of the water tank, then a larger value is selected from the corrected temperature of the lower area of the water tank and the temperature of the upper area of the water tank, and the larger value is added with the compensation value to obtain the panel display temperature; when the difference temperature is not less than the first judgment threshold value and the second judgment threshold value, the third correction value is subtracted from the temperature of the lower area of the water tank to obtain the corrected temperature of the lower area of the water tank, then a larger value is selected from the corrected temperature of the lower area of the water tank and the temperature of the upper area of the water tank, and the larger value is added with the compensation value to obtain the panel display temperature.
Referring to FIG. 10, one embodiment of the present application provides a specific water heater control method, comprising the steps of: starting up the heat pump water heater; then judging the magnitude relation between the shutdown temperature Ttop of the heat pump system and the set temperature Ts; if the temperature is less than or equal to Ttop, stopping the heat pump system after the temperature reaches the temperature Ts; if Ts is greater than Ttop, entering the following steps; the heat pump system is stopped after running to a Ttop value, and the electric heating relay operation is performed; calculating Δt=ts-Tstop; determining the value range of delta T; if Δt < 5 ℃, tx=max [ T5L-2, T5u ] +1, show in real time; stopping when max [ T5U, ave (T5L, T5U) ]ismore than or equal to Ts; if the delta T is more than or equal to 5 ℃, entering the following steps; determining that delta T is less than 10 ℃; if Δt < 10 ℃, tx=max [ T5L-3, T5u ] +1, show in real time; stopping when max [ T5U, ave (T5L, T5U) -1] is more than or equal to Ts; wherein ave (T5L, T5U) represents an average value of T5L and T5U; if DeltaT is more than or equal to 10 ℃, tx=max [ T5L-4, T5U ] +1, and displaying in real time; stopping when max [ T5U, ave (T5L, T5U) -2] is more than or equal to Ts; when the electric heating is not started after the heat pump system is stopped or when the electric heating relay operation meets the condition after the heat pump system is stopped, the machine enters a standby state.
Referring to fig. 11, the embodiment of the present application further provides a control apparatus 1100, including a memory 1200, a processor 1100, and a computer program stored in the memory 1200 and capable of running on the processor, where the processor 1100 implements a water heater control method as described above when executing the computer program.
Referring to fig. 11, a processor 1110 and a memory 1120 in the control apparatus 1100 may be exemplified by a bus connection. Memory 1120 acts as a non-transitory computer readable storage medium that can be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, memory 1120 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk memory, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 1120 optionally includes memory remotely located relative to processor 1110, which may be connected to control device 1100 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Those skilled in the art will appreciate that the device configuration shown in fig. 11 is not limiting of the control device 1100 and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
In addition, the embodiment of the application further provides a heat pump water heating device, namely the heat pump water heater as described in the embodiment of the application, and the description is omitted here.
Furthermore, the embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions for performing the above-described water heater control method, for example, by one processor 1110 in fig. 11, which may cause the one or more processors 1110 to perform the water heater control method in the above-described method embodiment, for example, perform the above-described method steps S100 to S400 in fig. 2, the method steps S210 in fig. 3, the method steps S310 to S330 in fig. 4, the method steps S340 to S360 in fig. 5, the method steps S331 to S530 in fig. 6, the method steps S511 to S513 in fig. 7, and the method step S531 in fig. 9.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network values. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer readable storage media (or non-transitory media) and communication media (or transitory media). The term computer-readable storage medium includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer-readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer-readable storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (13)
1. A water heater control method applied to a heat pump water heater, comprising:
acquiring a set water temperature and a heat pump stop temperature;
determining a difference temperature according to the set water temperature and the heat pump stop temperature under the condition that the set water temperature is larger than the heat pump stop temperature;
determining an adjusting value according to the difference temperature, and determining the current water temperature according to the temperature of the lower area of the water tank, the temperature of the upper area of the water tank and the adjusting value;
and controlling the heat pump water heater to be in a standby state under the condition that the current water temperature reaches the set water temperature.
2. The water heater control method according to claim 1, wherein the heat pump water heater further comprises a heat pump system and an electric heating device for heating the water tank, and the method further comprises, before determining the adjustment value according to the difference temperature:
And controlling the heat pump system to stop and performing heating treatment on the water tank by using the electric heating device under the condition that the temperature of the lower area of the water tank reaches the stop temperature of the heat pump.
3. The water heater control method according to claim 1, wherein the determining the current water temperature according to the tank lower region temperature, the tank upper region temperature, and the adjustment value comprises:
averaging the temperature of the lower area of the water tank and the temperature of the upper area of the water tank to obtain the average temperature of the water tank;
determining a water tank reference temperature according to the average water tank temperature and the adjustment value;
and determining the current water temperature according to the reference temperature of the water tank and the temperature of the upper area of the water tank.
4. The water heater control method according to claim 1, wherein the determining an adjustment value according to the difference temperature includes:
determining the regulating value as a first regulating value under the condition that the difference temperature is smaller than a preset first judging threshold value;
determining the regulating value as a second regulating value under the condition that the difference temperature is larger than or equal to the first judging threshold value and smaller than a preset second judging threshold value;
And determining the adjustment value as a third adjustment value in the case where the difference temperature is greater than the first determination threshold and greater than or equal to the second determination threshold.
5. A water heater control method according to claim 3, wherein said determining said current water temperature from said tank reference temperature and said tank upper region temperature comprises:
and selecting a larger value from the reference temperature of the water tank and the temperature of the upper area of the water tank as the current water temperature.
6. The water heater control method according to claim 1, wherein after the difference temperature is determined based on the set water temperature and the heat pump stop temperature, the method further comprises:
determining a correction value based on the difference temperature;
determining a lower tank area corrected temperature according to the lower tank area temperature and the corrected value;
and determining a panel display temperature according to the correction temperature of the lower area of the water tank and the temperature of the upper area of the water tank.
7. The water heater control method as recited in claim 6, wherein said determining a correction value based on said difference temperature comprises:
determining the correction value as a first correction value under the condition that the difference temperature is smaller than a preset third judgment threshold value;
Determining the correction value as a second correction value when the difference temperature is greater than or equal to the third judgment threshold value and less than a preset fourth judgment threshold value;
and determining the correction value as a third correction value in the case where the difference temperature is greater than the third determination threshold and greater than or equal to the fourth determination threshold.
8. The water heater control method as claimed in claim 6, wherein the determining a panel display temperature according to the tank lower region correction temperature and the tank upper region temperature includes:
and adding a preset compensation value to the larger value of the correction temperature of the lower area of the water tank and the adjustment temperature of the upper part of the water tank to obtain the panel display temperature.
9. A control device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the water heater control method according to any one of claims 1 to 8 when executing the computer program.
10. A heat pump water heating apparatus comprising a water tank, a first temperature sensor for detecting the temperature of an upper region of the water tank and a second temperature sensor for detecting the temperature of a lower region of the water tank, and a control device according to claim 8, wherein the first temperature sensor and the second temperature sensor are both connected to the control device.
11. The heat pump water heating apparatus according to claim 10, further comprising a heat pump system and an electrical heating device for heating the water tank, both connected to the control device.
12. The heat pump water heating apparatus according to claim 11, wherein the heat pump system comprises a compressor, a heat exchanger, a throttle mechanism, an evaporator, and a four-way valve, the compressor is connected to the heat exchanger and the evaporator through the four-way valve, respectively, the heat exchanger, the throttle mechanism, and the evaporator are connected in sequence, and the four-way valve is connected to the control device.
13. A computer-readable storage medium storing computer-executable instructions for performing the water heater control method according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311123365.9A CN117167982A (en) | 2023-08-31 | 2023-08-31 | Water heater control method, control device, equipment and computer readable storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311123365.9A CN117167982A (en) | 2023-08-31 | 2023-08-31 | Water heater control method, control device, equipment and computer readable storage medium |
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| CN (1) | CN117167982A (en) |
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