A bactericidal control method, device and water heater

Abstract

The present invention discloses a sterilization control method, device, and water heater. The method comprises: obtaining the temperature of hot water within the water heater; after determining that the hot water temperature is less than a first preset temperature, calculating a sterilization parameter value based on the cumulative duration that the hot water temperature is within each temperature interval and the bacterial activity coefficient corresponding to the temperature interval; and performing a sterilization operation after the sterilization parameter value satisfies a preset condition. The present invention enables a sterilization operation to be performed at an appropriate time after the hot water within the water heater has been at a certain temperature for a long time, thereby preventing bacterial growth within the water heater, improving the quality of domestic water, and ensuring water safety for users. Frequent and unnecessary sterilization operations can also be avoided, ensuring normal water use for users.

Description

Technical Field

[0001] The present invention relates to the field of electrical appliance technology, and in particular to a sterilization control method, device and water heater. Background Art

[0002] Water heaters provide essential hot water for daily life and have become indispensable. Some bacteria, such as Legionella pneumophila, lurk in water and are more active when the water temperature is low. Generally, a water heater's heat pump maintains high efficiency at a condensing temperature of around 40°C. In practice, the condensing temperature is typically below 60°C, creating favorable conditions for bacterial growth in the water tank. If the water in the water heater tank remains at a moderately low temperature for a prolonged period, bacteria can easily grow, degrading the quality of domestic water and impacting user health. Patent document CN109520129A discloses a heat pump water heater sterilization control method that determines whether to perform an automatic sterilization operation based on a sterilization value. However, this method only considers two factors: temperature and temperature change rate, failing to account for the time required for bacterial growth. As long as the temperature and temperature change rate meet certain conditions, the sterilization value increases, which can lead to frequent and unnecessary sterilization operations.

[0003] With regard to the problem that the sterilization control method of water heaters in the prior art easily leads to frequent and unnecessary sterilization operations, no effective solution has been proposed so far. Summary of the Invention

[0004] Embodiments of the present invention provide a sterilization control method, device, and water heater to solve the problem that the sterilization control method of the water heater in the prior art easily leads to frequent and unnecessary sterilization operations.

[0005] In order to solve the above technical problems, the present invention provides a sterilization control method, which comprises:

[0006] Get the hot water temperature in the water heater;

[0007] After determining that the hot water temperature is lower than the first preset temperature, calculating the sterilization parameter value according to the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval;

[0008] After the sterilization parameter value meets the preset conditions, the sterilization operation is performed.

[0009] Furthermore, the sterilization parameter value is calculated based on the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval, which is achieved according to the following formula:

[0010] Sx=k1·t1+…+kn·tn;

[0011] Among them, Sx is the sterilization parameter value, k1 is the bacterial activity coefficient corresponding to the first temperature interval; t1 is the cumulative time that the hot water temperature is in the first temperature interval, kn is the bacterial activity coefficient corresponding to the nth temperature interval; t1 is the cumulative time that the hot water temperature is in the nth temperature interval; among them, n is an integer greater than or equal to 2.

[0012] Furthermore, the preset conditions are:

[0013] The sterilization parameter value is greater than or equal to a preset threshold.

[0014] Furthermore, a sterilization operation is performed, including:

[0015] Controlling the temperature of the hot water in the water heater to rise to a temperature greater than a second preset temperature;

[0016] The second preset temperature is greater than the first preset temperature.

[0017] Furthermore, the method comprises:

[0018] After determining that the hot water temperature is greater than or equal to the first preset temperature, determining whether the bacterial colony is eliminated is performed based on the temperature range of the hot water temperature.

[0019] Furthermore, determining whether the bacterial flora is eliminated according to the temperature range of the hot water temperature includes:

[0020] Determine the temperature range of the hot water and the sterilization time corresponding to the temperature range;

[0021] Determine whether the duration of the hot water temperature within the current temperature range reaches the sterilization duration;

[0022] If yes, it is determined that the bacterial flora has been eliminated;

[0023] If not, it is determined that the bacterial flora has not been eliminated.

[0024] Furthermore, after determining that the bacterial flora has been eliminated, the method further includes:

[0025] The accumulated time that the hot water temperature is in each temperature range is reset to zero, and then the hot water temperature in the water heater is retrieved again.

[0026] The present invention also provides a sterilization control device, comprising:

[0027] An acquisition module is used to obtain the hot water temperature in the water heater;

[0028] a calculation module, configured to calculate a sterilization parameter value based on the accumulated time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval after determining that the hot water temperature is lower than the first preset temperature;

[0029] The execution module is used to execute the sterilization operation after the sterilization parameter value meets the preset conditions.

[0030] The present invention also provides a water heater comprising the above-mentioned sterilization control device.

[0031] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which implements the above-mentioned sterilization control method when the program is executed by a processor.

[0032] By applying the technical solution of the present invention, after determining that the temperature of hot water in the water heater is lower than the first preset temperature, the sterilization parameter value is calculated based on the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval. After the sterilization parameter value meets the preset conditions, the sterilization operation is performed. After the hot water in the water heater has been in the temperature condition for a long time, the sterilization operation can be performed at an appropriate time, thereby avoiding the growth of bacteria in the water heater, improving the quality of domestic water, ensuring the water safety of users, and avoiding frequent and unnecessary sterilization operations to ensure normal water use for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a flow chart of a sterilization control method according to an embodiment of the present invention;

[0034] Figure 2 is a flow chart of another sterilization control method according to an embodiment of the present invention;

[0035] Figure 3 is a structural diagram of a sterilization control device according to an embodiment of the present invention;

[0036] Figure 4 2 is a structural diagram of another sterilization control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0038] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "an," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two.

[0039] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0040] It should be understood that although the terms "first," "second," etc. may be used to describe the preset temperatures in embodiments of the present invention, these preset temperatures should not be limited to these terms. These terms are merely used to distinguish different preset temperatures. For example, without departing from the scope of embodiments of the present invention, the first preset temperature may also be referred to as the second preset temperature, and similarly, the second preset temperature may also be referred to as the first preset temperature.

[0041] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0042] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0043] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] Example 1

[0045] This embodiment provides a sterilization control method, which is applied to water heaters. Figure 1 Flowchart of the sterilization control method according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0046] S101, obtaining the hot water temperature in the water heater.

[0047] S102, after determining that the hot water temperature in the water heater is lower than the first preset temperature, calculate the sterilization parameter value according to the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval.

[0048] In specific implementation, the temperature range less than the first preset temperature can be divided into multiple intervals. For example, the first preset temperature is set to 60°C, and the temperature range less than 60°C is divided into three intervals: (-∞, 45°C), [45, 50°C), and [50, 60°C). The cumulative time that the hot water temperature in the water heater is in the above three temperature intervals is accumulated respectively. At the same time, the bacterial activity coefficient in the above three temperature intervals is obtained, and the sterilization parameter value is calculated according to the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval.

[0049] S103, after the sterilization parameter value meets the preset conditions, perform the sterilization operation.

[0050] The sterilization control method of this embodiment, after determining that the hot water temperature in the water heater is lower than the first preset temperature, calculates the sterilization parameter value according to the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval. After the sterilization parameter value meets the preset conditions, the sterilization operation is performed. Not only the temperature factor is taken into account, but also the cumulative time that the hot water temperature is in each temperature interval. After the hot water in the water heater has been at the temperature condition for a long time, the sterilization operation can be performed at the appropriate time, thereby avoiding the growth of bacteria in the water heater, improving the quality of domestic water, ensuring the water safety of users, and avoiding frequent and unnecessary sterilization operations to ensure normal water use for users.

[0051] Example 2

[0052] This embodiment provides another sterilization control method. In order to accurately calculate the sterilization parameter value and thereby ensure the accuracy of the timing of performing the sterilization operation, the sterilization parameter value is calculated based on the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval, according to the following formula: Sx = k1·t1+…+kn·tn; wherein, Sx is the sterilization parameter value, k1 is the bacterial activity coefficient corresponding to the first temperature interval; t1 is the cumulative time that the hot water temperature is in the first temperature interval, kn is the bacterial activity coefficient corresponding to the nth temperature interval; t1 is the cumulative time that the hot water temperature is in the nth temperature interval; wherein n is an integer greater than or equal to 2. It can be seen from the above formula that the lower the hot water temperature, or the longer the hot water in the water heater is in a certain low temperature range, the larger the sterilization parameter value. Conversely, the larger the sterilization parameter value, the lower the hot water temperature, or the longer the hot water in the water heater is in a certain low temperature range, the greater the possibility of bacteria growth. Therefore, in order to further ensure the accuracy of the sterilization timing, the above preset condition is: the sterilization parameter value is greater than or equal to the preset threshold.

[0053] Since the bacterial colony cannot survive after the temperature reaches a certain value, a sterilization operation is performed, including: controlling the temperature of the hot water in the water heater to rise to a temperature greater than a second preset temperature; wherein the second preset temperature is greater than the first preset temperature, and satisfies the requirement that the bacterial colony cannot survive at the second preset temperature. Technicians in this field can set the specific value of the second preset temperature according to the actual type of bacterial colony and the survival temperature, such as 70°C or higher.

[0054] The above embodiment describes a solution for actively controlling the timing of sterilization at a lower temperature. In actual applications, since the hot water temperature of the water heater may also reach a higher temperature during user use, if the temperature is very high, or it remains at a higher temperature for a certain period of time, it is equivalent to automatically completing a sterilization operation. In order to determine whether the bacterial colony has been eliminated, the above method includes: after determining that the hot water temperature is greater than or equal to the first preset temperature, determining whether the bacterial colony has been eliminated based on the temperature range in which the hot water temperature is located. Specifically, determining whether the bacterial colony has been eliminated based on the temperature range in which the hot water temperature is located includes: determining the temperature range in which the hot water temperature is located and the sterilization time corresponding to the temperature range; determining whether the time the hot water temperature has been in the current temperature range has reached the sterilization time; if so, determining that the bacterial colony has been eliminated; if not, determining that the bacterial colony has not been eliminated.

[0055] Once the bacteria have been eliminated, it is considered that a sterilization cycle has been completed. Therefore, in order to accurately control the timing of the next sterilization cycle, the accumulated time that the hot water temperature has been in each temperature range needs to be reset to zero, and then the hot water temperature in the water heater and subsequent steps need to be re-triggered. By determining that a sterilization cycle has been completed when the hot water temperature of the water heater reaches a very high temperature or remains at a high temperature for a certain period of time during user use, the number of sterilization cycles can be reduced to avoid affecting the normal use of the water heater.

[0056] The present invention will be described in detail below with reference to a specific example.

[0057] During the test cycle, the system determines whether the water tank temperature of the water heater meets the corresponding temperature conditions, thereby determining the activity level of the bacterial flora in the water tank, and cumulatively determining whether the sterilization conditions are met, and then determining whether to start the sterilization process. After the sterilization is completed, the sterilization judgment is repeated.

[0058] Set different temperature ranges, such as (-∞, 45°C), [45, 50°C), and [50, 60°C), and determine the bacterial activity coefficients k1, k2, and k3 for each of these three ranges, representing the degree of bacterial activity within this temperature range. The relationship between k1, k2, and k3 is as follows: k1 > k2 > k3. The corresponding relationship between temperature ranges and bacterial activity coefficients is shown in Table 1 below:

[0059] Table 1 Correspondence between different temperature ranges and bacterial activity coefficients

[0060] Temperature range Bacterial activity coefficient (－∞，45℃) k1 [45，50℃) k2 [50，60℃) k3

[0061] In specific implementation, the hot water temperature in the water heater is determined by the comprehensive temperature value, where the comprehensive temperature T = 0.4T 上 +0.6T 下 , where T 上 is the hot water temperature at the top of the water tank, T 下 It is the hot water temperature at the lower part of the water tank. It can also be judged by the hot water temperature at the lower part of the water tank or the hot water temperature at the upper part of the water tank.

[0062] Set a preset threshold S0, and the sterilization parameter value Sx = k1·t1+k2·t2+k3·t3, where t1, t2, and t3 are the cumulative time that the hot water temperature in the water heater is in the corresponding temperature range.

[0063] When the sterilization parameter value Sx ≥ the preset threshold S0, the conditions for performing the sterilization operation are met. The water heater completes the sterilization according to the pre-set sterilization temperature. After completion, re-detection and judgment are performed, and the accumulated time corresponding to all temperature ranges is reset to zero.

[0064] The above scheme is a sterilization control scheme at low temperature. In actual application, since the hot water temperature of the water heater may reach a higher temperature during user use, if the temperature is very high or remains at a higher temperature for a certain period of time, it is equivalent to automatically completing a sterilization operation. In order to determine whether the bacterial flora has been eliminated, that is, whether the sterilization operation has been completed, the sterilization time in different temperature ranges is set according to the characteristics of the bacteria. By judging whether the time the hot water temperature is in the current temperature range reaches the sterilization time corresponding to the current temperature range, it is judged whether the bacterial flora has been eliminated. For example, the temperature range [60, +∞] is divided into three temperature ranges: [60℃, 65℃], (65℃, 70℃], and (70℃, +∞). The sterilization operation is judged based on the current temperature range and the corresponding sterilization time. The following table shows the correspondence between different temperature ranges and sterilization times.

[0065] Table 2 Correspondence between different temperature ranges and bacterial activity coefficients

[0066] Temperature range Sterilization time / (min) (70℃，+∞) 0 (65℃，70℃] 2 [60℃，65℃] 30

[0067] As shown in Table 2 above, the higher the temperature, the shorter the corresponding sterilization time.

[0068] Figure 2 FIG. 1 is a flow chart of another sterilization control method according to an embodiment of the present invention. Figure 2 As shown, the method includes:

[0069] S1, obtain the hot water temperature T of the water heater.

[0070] S2, determine whether T<45°C is established, if yes, execute step S3, if no, execute step S4.

[0071] S3, accumulating the time t1 during which T is less than 45°C, obtaining the bacterial colony activity coefficient k1 corresponding to the temperature range, and then calculating the product of the two.

[0072] S4, determine whether 45≤T<50°C is established, if yes, execute step S5, if no, execute step S6.

[0073] S5, accumulating the time t2 when the temperature is 45≤T<50℃, obtaining the bacterial colony activity coefficient k2 corresponding to the temperature range, and then calculating the product of the two.

[0074] S6, judging whether 50≤T<60°C is established, if yes, executing step S7, if no, executing step S11.

[0075] S7, accumulating the time t3 during which the temperature is 50≤T<60°C, obtaining the bacterial colony activity coefficient k3 corresponding to the temperature range, and then calculating the product of the two.

[0076] S8, calculating the sterilization parameter value. In specific implementation, the sterilization parameter value is calculated according to the formula: sterilization parameter value Sx = k1·t1+k2·t2+k3·t3.

[0077] S9, determining whether the sterilization parameter value Sx>preset threshold S0 is established, if yes, executing step S10, if no, returning to step S1.

[0078] S10, performing sterilization operation.

[0079] S11, judging whether the bacterial colony is eliminated according to the interval of the hot water temperature T, if yes, executing step S12 and returning to step S1, if no, repeating step S11.

[0080] S12, clearing the duration of the hot water temperature in each temperature interval to zero.

[0081] Example 3

[0082] This embodiment provides a sterilization control device, which is applied to water heaters. Figure 3 : is a structural diagram of a sterilization control device according to an embodiment of the present invention, as shown in FIG. Figure 3 As shown, the device includes:

[0083] The acquisition module 10 is used to obtain the temperature of hot water in the water heater.

[0084] The calculation module 20 is used to calculate the sterilization parameter value according to the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval after determining that the hot water temperature in the water heater is lower than the first preset temperature.

[0085] In specific implementation, the temperature range less than the first preset temperature can be divided into multiple intervals. For example, the first preset temperature is set to 60°C, and the temperature range less than 60°C is divided into three intervals: (-∞, 45°C), [45, 50°C), and [50, 60°C). The cumulative time that the hot water temperature in the water heater is in the above three temperature intervals is accumulated respectively. At the same time, the bacterial activity coefficient in the above three temperature intervals is obtained, and the sterilization parameter value is calculated according to the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval.

[0086] The execution module 30 is used to execute the sterilization operation after the sterilization parameter value meets the preset conditions.

[0087] The sterilization control device of this embodiment calculates the sterilization parameter value according to the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval through the calculation module 20 after determining that the hot water temperature in the water heater is lower than the first preset temperature. After the sterilization parameter value meets the preset conditions, the execution module 30 performs the sterilization operation. After the hot water in the water heater has been at the temperature condition for a long time, the sterilization operation can be performed at an appropriate time to avoid bacterial growth in the water heater, improve the quality of domestic water, ensure the water safety of users, and avoid frequent and unnecessary sterilization operations to ensure normal water use for users.

[0088] Example 4

[0089] This embodiment provides another sterilization control device. In order to accurately calculate the sterilization parameter value and thus ensure the accuracy of the timing of performing the sterilization operation, the calculation module 20 calculates the sterilization parameter value based on the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval, according to the following formula: Sx = k1·t1+…+kn·tn; wherein, Sx is the sterilization parameter value, k1 is the bacterial activity coefficient corresponding to the first temperature interval; t1 is the cumulative time that the hot water temperature is in the first temperature interval, kn is the bacterial activity coefficient corresponding to the nth temperature interval; t1 is the cumulative time that the hot water temperature is in the nth temperature interval; wherein n is an integer greater than or equal to 2. It can be seen from the above formula that the lower the hot water temperature, or the longer the hot water in the water heater is in a certain low temperature range, the larger the sterilization parameter value. Conversely, the larger the sterilization parameter value, the lower the hot water temperature, or the longer the hot water in the water heater is in a certain low temperature range, the greater the possibility of bacteria growth. Therefore, in order to further ensure the accuracy of the sterilization timing, the above preset condition is: the sterilization parameter value is greater than or equal to the preset threshold.

[0090] Since the bacterial colony cannot survive after the temperature reaches a certain value, the execution module 30 is specifically used to: control the hot water temperature in the water heater to rise to a temperature greater than a second preset temperature; wherein the second preset temperature is greater than the first preset temperature, and the bacterial colony cannot survive at the second preset temperature.

[0091] Figure 4 FIG2 is a structural diagram of another sterilization control device according to an embodiment of the present invention. In the above embodiment, a solution for actively controlling the timing of sterilization at a relatively low temperature is described. In actual application, since the hot water temperature of the water heater may also reach a relatively high temperature during user use, if the temperature is very high or remains at a relatively high temperature for a certain period of time, it is equivalent to automatically completing a sterilization operation. In order to determine whether the bacterial flora has been eliminated, Figure 4As shown, the above-mentioned device also includes: a judgment module 40, which is used to determine whether the bacterial colony has been eliminated based on the temperature range of the hot water temperature after determining that the hot water temperature is greater than or equal to the first preset temperature. Specifically, the judgment module 40 is used to determine the temperature range of the hot water temperature and the sterilization time corresponding to the temperature range; determine whether the duration of the hot water temperature in the current temperature range reaches the sterilization time; if so, determine that the bacterial colony has been eliminated; if not, determine that the bacterial colony has not been eliminated.

[0092] After confirming that the bacteria have been eliminated, it is equivalent to completing a sterilization. Therefore, in order to accurately control the timing of the next sterilization, it is necessary to reset the cumulative time of the hot water temperature in each temperature range, and then re-trigger the acquisition of the hot water temperature in the water heater and subsequent steps. Therefore, if Figure 4 As shown, the above device further includes: a clearing module 50, which is used to clear the accumulated time that the hot water temperature is in each temperature range after the judgment module 40 determines that the bacterial colony has been eliminated.

[0093] Example 5

[0094] This embodiment provides a water heater, including a sterilization control device being implemented, which is used to perform a sterilization operation at an appropriate time after the hot water in the water heater has been at a temperature condition for a long time, thereby avoiding bacterial growth in the water heater, improving the quality of domestic water, and ensuring the safety of users' water use.

[0095] Example 6

[0096] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the above-mentioned sterilization control method is implemented.

[0097] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0098] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A sterilization control method, characterized in that: The method comprises: Get the hot water temperature in the water heater; After determining that the hot water temperature is lower than the first preset temperature, calculating the sterilization parameter value according to the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval; After the sterilization parameter value meets the preset conditions, the sterilization operation is performed.

2. The method according to claim 1, characterized in that The sterilization parameter value is calculated based on the cumulative time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval, according to the following formula: Sx=k1·t1+…+kn·tn; Among them, Sx is the sterilization parameter value, k1 is the bacterial activity coefficient corresponding to the first temperature interval; t1 is the cumulative time that the hot water temperature is in the first temperature interval, kn is the bacterial activity coefficient corresponding to the nth temperature interval; t1 is the cumulative time that the hot water temperature is in the nth temperature interval; among them, n is an integer greater than or equal to 2.

3. The method according to claim 1, characterized in that The preset conditions are: The sterilization parameter value is greater than or equal to a preset threshold.

4. The method according to claim 1, wherein Perform sterilization operations, including: Controlling the temperature of the hot water in the water heater to rise to a temperature greater than a second preset temperature; Wherein, the second preset temperature is greater than the first preset temperature.

5. The method according to claim 1, wherein The method comprises: After determining that the hot water temperature is greater than or equal to the first preset temperature, determining whether the bacterial colony is eliminated is performed based on the temperature range of the hot water temperature.

6. The method according to claim 5, characterized in that Determining whether the bacterial flora is eliminated according to the temperature range of the hot water temperature includes: Determine the temperature range of the hot water and the sterilization time corresponding to the temperature range; Determine whether the duration of the hot water temperature within the current temperature range reaches the sterilization duration; If yes, it is determined that the bacterial flora has been eliminated; If not, it is determined that the bacterial flora has not been eliminated.

7. The method according to claim 5, characterized in that After determining that the bacterial flora has been eliminated, the method further includes: The accumulated time that the hot water temperature is in each temperature range is reset to zero, and then the hot water temperature in the water heater is retrieved again.

8. A sterilization control device, characterized in that: The device comprises: An acquisition module is used to obtain the hot water temperature in the water heater; a calculation module, configured to calculate a sterilization parameter value based on the accumulated time that the hot water temperature is in each temperature interval and the bacterial activity coefficient corresponding to the temperature interval after determining that the hot water temperature is lower than the first preset temperature; The execution module is used to execute the sterilization operation after the sterilization parameter value meets the preset conditions.

9. A water heater, characterized in that: Including the sterilization control device according to claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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