Display method of hot water outlet progress and water heater

Abstract

The application provides a water heater water outlet progress display method and a water heater. The method comprises obtaining a water outlet starting instruction of the water heater and obtaining an initial water temperature in the water heater; determining a water outlet temperature and a corresponding relationship of the water outlet progress according to the initial water temperature, the corresponding relationship being provided with a water outlet progress corresponding to different water temperatures, and the progress corresponding to the highest water temperature in the corresponding relationship being a full progress; continuously detecting a real-time water temperature in the water heater during the water outlet process, querying the progress of the real-time water temperature from the corresponding relationship; and displaying the water outlet progress of the water heater according to the queried progress, so that the water outlet progress corresponding to different water temperatures in the water heater is reset according to different initial water temperatures each time the water heater is used, the initial value of the water heater display water outlet progress still remaining at the water outlet progress after the use of the last user is avoided, the water outlet progress in the water heater can be more truly reflected to the user, and the experience of the user is improved.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a method for displaying the water flow rate of a water heater and the water heater itself. Background Technology

[0002] Currently, water heaters are widely used in households. However, the way they display the water flow progress is rather limited. Specifically, on the one hand, when a user uses the water heater, the initial value displayed remains the water flow level after the previous user's use, failing to provide a new water flow progress for the current user. On the other hand, the water flow progress is displayed based on a fixed water temperature; for example, it displays full progress at 80 degrees Celsius and 50% at 60 degrees Celsius, unable to adjust the water flow progress based on different initial water temperatures. These issues cause some confusion for users in understanding the water flow progress of their water heater, thus reducing their user experience. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a method for displaying the water flow progress of a water heater that overcomes or at least partially solves the above problems.

[0004] One objective of this invention is to reselect the correspondence between water temperature and water flow rate for the water heater each time it is used, thereby improving the user's water usage experience.

[0005] In particular, according to one aspect of the present invention, the present invention provides a method for displaying the water output progress of a water heater, comprising:

[0006] Obtain the water outlet start command from the water heater and obtain the initial water temperature inside the water heater;

[0007] The correspondence between the outlet water temperature and the outlet water progress is determined based on the initial water temperature. The correspondence specifies the outlet water progress corresponding to different water temperatures, and the progress corresponding to the highest water temperature specified in the correspondence is the full progress.

[0008] During the water output process, the real-time water temperature inside the water heater is continuously monitored, and the progress of the real-time water temperature is queried from the corresponding relationship.

[0009] The water output progress of the water heater is displayed according to the query results.

[0010] Optionally, the step of determining the correspondence between the outlet water temperature and the outlet water progress based on the initial water temperature includes:

[0011] Compare the initial water temperature with the highest temperature specified in each corresponding relationship;

[0012] Select the correspondence between the highest temperature that is closest to the initial water temperature and the corresponding relationship.

[0013] Optionally, the step of querying the progress of the real-time water temperature from the correspondence includes:

[0014] Compare the real-time water temperature with each temperature in the corresponding relationship;

[0015] The progress corresponding to the water temperature closest to the real-time water temperature is selected as the progress of the real-time water temperature.

[0016] Optionally, the step of comparing the initial water temperature with the highest temperature specified in each corresponding relationship, and selecting the corresponding relationship to which the highest temperature closest to the initial water temperature belongs, may include:

[0017] Calculate the difference between the initial water temperature and the highest temperature specified in each corresponding relationship;

[0018] Determine whether any of the stated differences are negative.

[0019] If a negative difference exists, discard it.

[0020] Select the smallest difference from the differences after removing negative numbers, and determine the correspondence between the highest temperature that is closest to the initial water temperature based on the smallest difference.

[0021] Optionally, the step of selecting the progress corresponding to the water temperature closest to the real-time water temperature as the progress of the real-time water temperature includes:

[0022] When the real-time water temperature is lower than the lowest temperature in the corresponding relationship, an alert message is output.

[0023] Optionally, the colors used to display the water flow rate of the water heater may differ depending on the specific correspondence.

[0024] Optionally, before the step of obtaining the initial water temperature in the water heater, the following steps are included:

[0025] Calculate the time interval between obtaining the water outlet start command from the water heater and the last water outlet start command;

[0026] Determine whether the time interval is greater than a preset interval;

[0027] If so, proceed with the step of obtaining the initial water temperature inside the water heater.

[0028] Optionally, if the time interval is less than or equal to the preset interval, it is determined whether the current user and the previous user are the same.

[0029] If they are different, proceed with the step of obtaining the initial water temperature in the water heater.

[0030] Optionally, if the current user is the same as the previous user, the current correspondence is maintained.

[0031] According to another aspect of the present invention, a water heater is also provided, comprising:

[0032] A memory and a processor, wherein the memory stores a control program, which, when executed by the processor, is used to implement the method for displaying the amount of hot water in a water heater according to any one of the preceding descriptions.

[0033] In the water heater dispensing progress display method of the present invention, a water dispensing start command of the water heater is obtained, and the initial water temperature inside the water heater is obtained. A correspondence between the dispensing water temperature and the dispensing progress is determined based on the initial water temperature. During the dispensing process, the real-time water temperature inside the water heater is continuously monitored, and the progress relative to the real-time water temperature is retrieved from the correspondence. The dispensing progress of the water heater is displayed according to the retrieved progress. This achieves the goal of selecting different correspondences based on different initial water temperatures each time the water heater is used, thereby resetting the dispensing progress corresponding to different water temperatures in the water heater according to different initial water temperatures. This avoids the initial value of the dispensing progress displayed by the water heater remaining at the dispensing progress after the previous user's use, thus providing a more realistic reflection of the dispensing progress in the water heater for the user, improving the user experience. Furthermore, the progress corresponding to the highest water temperature specified in each correspondence is the full progress, allowing the user to visually perceive that they are starting to use the water heater at a full progress state, making this dispensing progress display method more acceptable and improving the user experience.

[0034] Furthermore, the difference between the initial water temperature and the maximum temperature specified in each corresponding relationship is calculated. It is then determined whether any of these differences are negative. If so, negative differences are discarded. The smallest difference is selected from the remaining differences, and the corresponding relationship for the maximum temperature closest to the initial water temperature is determined based on this smallest difference. The reason for checking for and discarding negative differences is to avoid situations where the selected corresponding relationship has a maximum temperature greater than the initial water temperature. If a corresponding relationship has a maximum temperature greater than the initial water temperature, the progress corresponding to the maximum water temperature in the relationship is considered full progress, while the progress corresponding to the initial water temperature is not actually full progress. This would cause the actual water temperature in the water heater to decrease faster than the progress displayed in the corresponding relationship, meaning the actual water temperature output from the water heater would be lower than the displayed temperature, reducing user comfort and causing inconvenience.

[0035] Furthermore, during water heater use, users often stop the water flow function for various reasons, only to resume it after a preset interval. If the initial water temperature is re-acquired during this period and the correlation between the outlet water temperature and the water flow rate is re-established, the water flow rate will not accurately reflect the user's overall usage, significantly degrading the user experience. Therefore, before acquiring the initial water temperature, the time interval between the initial water flow start command and the previous start command should be calculated. If this time interval exceeds a preset interval, then acquiring the initial water temperature should proceed, effectively avoiding the aforementioned problem.

[0036] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0037] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0038] Figure 1 This is a flowchart of a method for displaying the water output progress of a water heater according to an embodiment of the present invention;

[0039] Figure 2 This is a flowchart of a method for displaying the water output progress of a water heater according to another embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram illustrating the correspondence between different water temperatures and water output progress according to another embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of a water heater according to an embodiment of the present invention. Detailed Implementation

[0042] Figure 1 This is a flowchart illustrating a method for displaying the water flow rate of a water heater according to an embodiment of the present invention. For this water heater, the bathing time at different water temperatures has been obtained through simulation calculations and experiments. The bathing time can be defined as the time it takes for water from the water heater to be mixed by the mixing valve and for hot water of a specified temperature to flow out of the outlet at a specific flow rate. For example, the specific flow rate could be 6 L / min or 6.5 L / min, and the specified temperature could be 40°C or 35°C, etc. Furthermore, the water heater has an internal temperature sensor to acquire the water temperature. See also... Figure 1The method for displaying the water output progress of the water heater may include steps S102 to S104.

[0043] Step S102: Obtain the water outlet start command from the water heater and obtain the initial water temperature inside the water heater.

[0044] In this step, obtaining the water outlet start command from the water heater indicates that the water heater is about to be used or has already been used by the user.

[0045] Step S104: Determine the correspondence between the outlet water temperature and the outlet water progress based on the initial water temperature. The correspondence specifies the outlet water progress corresponding to different water temperatures, and the progress corresponding to the highest water temperature specified in the correspondence is the full progress.

[0046] In this step, multiple different correspondences are preset, each specifying the water output progress corresponding to different water temperatures. Furthermore, the highest water temperature specified in each correspondence is different. Specifically, for example, suppose a correspondence specifies four different water temperatures: 70℃, 60℃, 50℃, and 40℃, where the output progress corresponding to 70℃ is full. Of course, the number of different water temperatures specified in the correspondence can also be five, seven, or more. Additionally, the temperature difference between two adjacent water temperatures in each correspondence can be different.

[0047] Step S106: During the water output process, continuously monitor the real-time water temperature inside the water heater and query the progress of the real-time water temperature from the corresponding relationship.

[0048] Step S108: Display the water output progress of the water heater according to the queried progress.

[0049] In this embodiment, the system obtains the water heater's water dispensing start command and the initial water temperature inside the water heater. Based on the initial water temperature, it determines the correspondence between the outlet water temperature and the water dispensing progress. During the water dispensing process, it continuously monitors the real-time water temperature inside the water heater, queries the progress relative to the real-time water temperature from the correspondence, and displays the water dispensing progress according to the queried progress. This allows for the selection of different correspondences based on different initial water temperatures each time the water heater is used, thereby resetting the water dispensing progress corresponding to different water temperatures in the water heater. This avoids the water heater displaying the initial water dispensing progress as it was after the previous user's use, thus providing a more realistic reflection of the water dispensing progress and improving the user experience. Furthermore, the progress corresponding to the highest water temperature specified in each correspondence is the full progress, allowing the user to visually perceive that they are starting use of the water heater at a full progress state, making this water dispensing progress display method more acceptable and improving the user experience.

[0050] In one embodiment of the present invention, the step of determining the correspondence between the outlet water temperature and the outlet water rate based on the initial water temperature may include:

[0051] Compare the initial water temperature with the maximum temperature specified in each corresponding relationship;

[0052] Choose the corresponding relationship of the highest temperature that is closest to the initial water temperature.

[0053] In this embodiment, the maximum water temperature specified in each correspondence is different. By comparing the initial water temperature with the maximum water temperature specified in each correspondence, the correspondence with the maximum temperature closest to the initial water temperature is selected, thereby enabling the selection of the correspondence that best matches the initial water temperature.

[0054] In one embodiment of the present invention, the step of comparing the initial water temperature with the highest temperature specified in each corresponding relationship, and selecting the corresponding relationship to which the highest temperature closest to the initial water temperature belongs may include:

[0055] Calculate the difference between the initial water temperature and the maximum temperature specified in each corresponding relationship;

[0056] Determine if any of the differences are negative.

[0057] If a negative difference exists, discard it.

[0058] Select the smallest difference from the differences after removing negative numbers, and determine the correspondence between the highest temperature that is closest to the initial water temperature based on the smallest difference.

[0059] In this embodiment, the initial water temperature can be subtracted from the maximum temperature specified in each corresponding relationship to obtain various difference values. The reason for checking whether there are negative differences and discarding them if so is to avoid situations where the maximum temperature in the selected corresponding relationship is greater than the initial water temperature. If the maximum temperature in the selected corresponding relationship is greater than the initial water temperature, the progress corresponding to the maximum water temperature in the corresponding relationship is at full progress, while the progress corresponding to the initial water temperature is not actually at full progress. This will cause the actual water temperature in the water heater to decrease faster than the progress displayed in the corresponding relationship, meaning the actual water temperature output from the water heater is lower than the water temperature displayed in the corresponding relationship, reducing user comfort and causing inconvenience. Specifically, for example, if the maximum temperatures specified in two corresponding relationships are 70℃ and 65℃, and the initial water temperature is 68℃, the resulting differences are -2 and 3 respectively. Discarding -2, the corresponding relationship for 65℃ can be obtained based on the difference of 3.

[0060] In one embodiment of the present invention, the step of selecting the progress corresponding to the water temperature closest to the real-time water temperature as the progress of the real-time water temperature may include:

[0061] When the real-time water temperature is lower than the lowest temperature in the corresponding relationship, an alert message will be output.

[0062] In this embodiment, there are several ways to output a reminder message when the real-time water temperature is lower than the lowest temperature in the corresponding relationship. Specifically, for example, when the real-time water temperature is lower than the lowest temperature in the corresponding relationship, a buzzer can be emitted to remind the user that the hot water in the water heater is running out, or a voice reminder can be given to the user that the hot water in the water heater is running out. Outputting a reminder message when the real-time water temperature is lower than the lowest temperature in the corresponding relationship allows the user to keep track of the water supply progress of the water heater.

[0063] In some other embodiments, after the step of outputting the reminder message, the water supply function of the water heater may also be turned off.

[0064] In this embodiment, after outputting the reminder message, the water supply function of the water heater is turned off, which can prevent users from using water that is too cold for bathing and improve the user experience.

[0065] In one embodiment of the present invention, the colors used to display the water output progress of the water heater are different in different correspondences.

[0066] In this embodiment, generally, different colors can be determined based on the highest temperature among the specified water temperatures in different correspondences. Specifically, for example, the higher the highest temperature among the specified water temperatures in the correspondence, the darker the color used to display the water flow progress of the water heater can be. Because the progress corresponding to the highest water temperature specified in the correspondence is the full progress, different colors are specified for displaying the water flow progress of the water heater in different correspondences, allowing users to distinguish the initial water temperature corresponding to each different full progress based on the color, thus improving the user experience.

[0067] In one embodiment of the present invention, before the step of obtaining the initial water temperature in the water heater, the following may be included:

[0068] Calculate the time interval between receiving the water outlet start command from the water heater and the last water outlet start command;

[0069] Determine if the time interval is greater than the preset interval;

[0070] If so, proceed with the step of obtaining the initial water temperature inside the water heater.

[0071] In this embodiment, users often stop the water heater's water output function for various reasons during use, and then resume using it after a preset interval. If the initial water temperature is re-acquired during the period when the user stops the water output function, and the correspondence between the output water temperature and the water output progress is re-determined based on the initial water temperature, it will result in an inaccurate reflection of the water output progress throughout the user's water usage process, significantly reducing the user experience. Therefore, before acquiring the initial water temperature, the time interval between acquiring the water output start command and the last water output start command is calculated, and it is determined whether the time interval is greater than the preset interval. If so, the step of acquiring the initial water temperature is performed, which can effectively avoid the above problem. The preset interval can be set according to the user's water heater usage habits and can be any value between 1 and 10 minutes, such as 2 minutes, 3 minutes, 4 minutes, etc.

[0072] In one embodiment of the present invention, if the time interval is less than or equal to a preset interval, it is determined whether the current user and the previous user are the same; if they are different, the step of obtaining the initial water temperature in the water heater is performed.

[0073] In this embodiment, under certain special circumstances, if the time interval is less than or equal to a preset interval, it is possible that the same user is using the water heater. Therefore, it is necessary to determine whether the current user is the same as the previous user. If they are different, the step of obtaining the initial water temperature in the water heater is executed, thereby ensuring that the corresponding relationship is re-selected for the new user based on the initial temperature, improving the user experience. There are several ways to determine whether the current user is the same as the previous user of the water heater. For example, fingerprint recognition or image recognition can be used to determine whether the current user is the same as the previous user of the water heater.

[0074] In one embodiment of the present invention, if the current user is the same as the previous user, the current correspondence is maintained.

[0075] In this embodiment, if the current user is the same as the user who used the water heater last time, there is no need to reselect the corresponding relationship for the user. That is, the current corresponding relationship is maintained. During the water dispensing process, the real-time water temperature in the water heater is continuously monitored. The progress of the real-time water temperature is queried from the current corresponding relationship, and the water dispensing progress of the water heater is displayed according to the queried progress, so as to truly reflect the water dispensing progress of the user's entire water use process.

[0076] See Figure 2 , Figure 2 This is a flowchart of a method for displaying the water output progress of a water heater according to another embodiment of the present invention, including the following steps S202 to S220.

[0077] Step S202: Obtain the water outlet start command from the water heater.

[0078] Step S204: Calculate the time interval between obtaining the water outlet start command from the water heater and the last water outlet start command.

[0079] Step S206: Determine whether the time interval is greater than a preset interval. The size of the preset interval can be referred to in the above embodiment, and will not be repeated here.

[0080] If yes, proceed to step S208; otherwise, proceed to step S216.

[0081] Step S208: Obtain the initial water temperature inside the water heater.

[0082] Step S210: Compare the initial water temperature with the highest temperature specified in each corresponding relationship, and select the corresponding relationship to which the highest temperature closest to the initial water temperature belongs. The corresponding relationship specifies the water output progress corresponding to different water temperatures, and the progress corresponding to the highest water temperature specified in the corresponding relationship is the full progress.

[0083] Step S212: During the water output process, continuously monitor the real-time water temperature inside the water heater and query the progress of the real-time water temperature from the corresponding relationship.

[0084] Step S214: Display the water output progress of the water heater according to the queried progress.

[0085] Step S216: When the real-time water temperature is lower than the lowest temperature in the corresponding relationship, output a reminder message.

[0086] Step S218: Determine whether the current user is the same as the previous user.

[0087] If they are different, proceed to step S208; if they are the same, proceed to step S220.

[0088] Step S220: Maintain the current correspondence.

[0089] See Figure 3 , Figure 3 This is a schematic diagram illustrating the correspondence between different water temperatures and water output rates according to another embodiment of the present invention. Figure 3 For example, this section describes in detail the display process of the water output progress of a water heater. Figure 3 The horizontal axis represents the total water usage time in seconds, and the vertical axis represents the various water temperatures in degrees Celsius.

[0090] Obtain the water heater's start-up command and determine the initial water temperature inside the water heater as 75℃. Assume... Figure 3The highest water temperature in the corresponding relationship is 75℃, and it also includes water temperatures T1, T2, T3, and T4, with T1, T2, T3, and T4 decreasing in that order. After comparing the initial water temperature with the highest temperature specified in each corresponding relationship, since the initial water temperature... Figure 3 The highest water temperature in the corresponding relationships is the same, therefore, choose... Figure 3 The diagram shows the correspondence between the water temperature and the water heater. During the water flow process, the real-time water temperature is continuously monitored. The progress is checked against the real-time water temperature in the correspondence. When the real-time water temperature is the same as water temperature T1, the shower time is displayed as 400 seconds; when it is the same as water temperature T2, the shower time is displayed as 800 seconds; when it is the same as water temperature T3, the shower time is displayed as 1200 seconds; and when it is the same as water temperature T4, the shower time is displayed as 1600 seconds. Since the initial water temperature is 75℃, which is relatively high, the displayed shower time is red. When the real-time water temperature is lower than water temperature T4, a reminder message is output.

[0091] In addition to representing the water output progress using time, it can also be represented using a progress bar. Specifically, for example, due to the initial water temperature... Figure 3 Since the highest water temperature in the corresponding relationship is the same, the water flow progress at the initial water temperature is displayed as a full red bar. During the water flow process, the real-time water temperature inside the water heater is continuously monitored, and the progress is checked against the real-time water temperature in the corresponding relationship. When the real-time water temperature is the same as water temperature T1, 3 / 4 of the full red bar is displayed; when the real-time water temperature is the same as water temperature T2, 2 / 4 of the full red bar is displayed; when the real-time water temperature is the same as water temperature T3, 1 / 4 of the full red bar is displayed; when the real-time water temperature is the same as water temperature T4, zero is displayed. When the real-time water temperature is lower than water temperature T4, an alert message is output.

[0092] See Figure 4 Based on the same concept, the present invention also provides a water heater 400. The water heater 400 may include a memory 401 and a processor 402. The memory 401 stores a control program. When executed by the processor 402, the control program is used to implement a method for displaying the amount of hot water in the water heater according to any of the above embodiments.

[0093] The above embodiments can be combined arbitrarily. Based on any one preferred embodiment or a combination of multiple preferred embodiments, the embodiments of the present invention can achieve the following beneficial effects:

[0094] In the water heater dispensing progress display method of the present invention, a water dispensing start command of the water heater is obtained, and the initial water temperature inside the water heater is obtained. A correspondence between the dispensing water temperature and the dispensing progress is determined based on the initial water temperature. During the dispensing process, the real-time water temperature inside the water heater is continuously monitored, and the progress relative to the real-time water temperature is retrieved from the correspondence. The dispensing progress of the water heater is displayed according to the retrieved progress. This achieves the goal of selecting different correspondences based on different initial water temperatures each time the water heater is used, thereby resetting the dispensing progress corresponding to different water temperatures in the water heater according to different initial water temperatures. This avoids the initial value of the dispensing progress displayed by the water heater remaining at the dispensing progress after the previous user's use, thus providing a more realistic reflection of the dispensing progress in the water heater for the user, improving the user experience. Furthermore, the progress corresponding to the highest water temperature specified in each correspondence is the full progress, allowing the user to visually perceive that they are starting to use the water heater at a full progress state, making this dispensing progress display method more acceptable and improving the user experience.

[0095] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A method for displaying the water flow progress of a water heater, comprising: Obtain the water outlet start command from the water heater and obtain the initial water temperature inside the water heater; The correspondence between the outlet water temperature and the outlet water progress is determined based on the initial water temperature. The correspondence specifies the outlet water progress corresponding to different water temperatures, and the progress corresponding to the highest water temperature specified in the correspondence is the full progress. During the water output process, the real-time water temperature inside the water heater is continuously monitored, and the progress of the real-time water temperature is queried from the corresponding relationship. The water output progress of the water heater is displayed according to the query results; The step of determining the correspondence between the outlet water temperature and the outlet water rate based on the initial water temperature includes: Compare the initial water temperature with the highest temperature specified in each corresponding relationship; Select the correspondence between the highest temperature closest to the initial water temperature; The step of comparing the initial water temperature with the highest temperature specified in each corresponding relationship, and selecting the corresponding relationship to which the highest temperature closest to the initial water temperature belongs, may include: Calculate the difference between the initial water temperature and the highest temperature specified in each corresponding relationship; Determine whether any of the stated differences are negative. If a negative difference exists, discard it. Select the smallest difference from the differences after removing negative numbers, and determine the correspondence between the highest temperature that is closest to the initial water temperature based on the smallest difference.

2. The display method according to claim 1, wherein, The steps for querying the progress of the real-time water temperature from the correspondence include: Compare the real-time water temperature with each temperature in the corresponding relationship; The progress corresponding to the water temperature closest to the real-time water temperature is selected as the progress of the real-time water temperature.

3. The display method according to claim 2, wherein, The step of selecting the progress corresponding to the water temperature closest to the real-time water temperature as the progress of the real-time water temperature includes: When the real-time water temperature is lower than the lowest temperature in the corresponding relationship, an alert message is output.

4. The display method according to claim 1, wherein, The colors used to indicate the water flow rate of the water heater differ depending on the specific correspondence.

5. The display method according to claim 1, wherein, Before the step of obtaining the initial water temperature in the water heater, the following steps are included: Calculate the time interval between obtaining the water outlet start command from the water heater and the last water outlet start command; Determine whether the time interval is greater than a preset interval; If so, proceed with the step of obtaining the initial water temperature inside the water heater.

6. The display method according to claim 5, wherein, If the time interval is less than or equal to the preset interval, determine whether the current user and the previous user are the same; If they are different, proceed with the step of obtaining the initial water temperature in the water heater.

7. The display method according to claim 6, wherein, If the current user is the same as the previous user, maintain the current correspondence.

8. A water heater, comprising: A memory and a processor, wherein the memory stores a control program, which, when executed by the processor, is used to implement the method for displaying the amount of hot water in a water heater according to any one of claims 1-7.

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