Heating control method and device for storage water heater

Abstract

The present application provides a heating control method and device for a water storage water heater. The method obtains the flow rate value collected by a flow sensor and the accumulated time value of a timer. If the flow rate value is greater than or equal to a preset flow rate threshold, and the time value is greater than or equal to the preset time threshold, the temperature difference between the set temperature and the insulation return difference is obtained, as well as the current water outlet temperature. The method then determines whether the current water outlet temperature is less than the temperature difference. If the current water outlet temperature is less than the temperature difference, the heating tube in the water storage water heater is activated for heating. Compared to the prior art, the present application can accurately determine which heating tube to use for heating. This avoids the problem of the water temperature in the inner tank of the water storage water heater being too high or too low during use. At the same time, it can also achieve the effect of increasing the capacity of the water storage water heater without affecting user use.

Description

Technical Field

[0001] The present application relates to the field of water storage water heaters, and in particular to a heating control method and device for a water storage water heater. Background Art

[0002] For storage water heaters, when users use the water heater, due to limited capacity, they usually start the heating pipe near the water outlet to increase the outlet water temperature so that more cold water can be mixed, thereby achieving the purpose of increasing the capacity of the water heater.

[0003] In the prior art, the temperature difference between the temperature inside the tank and the set temperature is usually used to determine whether to start the heating pipe near the water outlet, so as to increase the temperature of the water heater and achieve the effect of increasing capacity. That is, the temperature difference is compared with a preset threshold. When the temperature difference is greater than the preset threshold, the heating pipe in the inner tank is started for heating. When the temperature difference is less than the preset threshold, the heating pipe in the inner tank is not started for heating.

[0004] However, since the water in the water heater tank flows upward when water is used, the heating tube in the tank is used for heating, which can easily cause the water temperature in the water heater to be too high, and the outlet water temperature will also become high, which can easily scald the user. At the same time, since the heating tube in the tank cannot accurately control the heating temperature during heating, the outlet water temperature has a poor constant temperature. Summary of the Invention

[0005] The present application provides a heating control method and device for a storage water heater, which is used to solve the problem that the water temperature of the storage water heater is unstable due to the inability to accurately control the heating process.

[0006] In a first aspect, the present application provides a heating control method for a storage water heater, comprising:

[0007] Obtain the flow value collected by the flow sensor and the time value accumulated by the timer;

[0008] If the flow rate value is greater than or equal to the preset flow rate threshold, and the time value is greater than or equal to the preset time threshold, the temperature difference between the set temperature and the insulation return difference is obtained, and the current water outlet temperature is obtained;

[0009] It is determined whether the current outlet water temperature is less than the temperature difference. If it is determined that the current outlet water temperature is less than the temperature difference, the heating pipe in the storage water heater is started to perform heating.

[0010] In a specific embodiment, the heating control method further includes:

[0011] If it is determined that the current outlet water temperature is not less than the temperature difference, the internal temperature of the water storage water heater and the preset early start limit value are obtained, and it is determined whether the internal temperature is less than the temperature difference;

[0012] If it is determined that the temperature inside the tank is less than the temperature difference, it is determined whether the temperature inside the tank is less than the preset early limit value;

[0013] If it is determined that the temperature inside the tank is lower than the preset early limit value, the power margin required for the storage water heater to heat the water temperature to the set temperature is obtained;

[0014] When it is determined that the current outlet water temperature is lower than the set temperature and the power margin is greater than the pre-stored upper heating tube power, the upper heating tube in the storage water heater is started for heating.

[0015] In a specific embodiment, the heating control method further includes:

[0016] If the temperature inside the tank is greater than or equal to the temperature difference, the lower heating pipe in the storage water heater is started to perform heating;

[0017] or,

[0018] If the temperature inside the tank is greater than or equal to the early limit value, the lower heating pipe in the storage water heater is started for heating;

[0019] or,

[0020] If the outlet water temperature is greater than or equal to the set temperature, the lower heating pipe in the storage water heater is started for heating;

[0021] or,

[0022] If the power margin is less than or equal to the pre-stored upper heating tube power, the lower heating tube in the storage water heater is started for heating.

[0023] In a specific embodiment, the step of starting the heating pipe in the storage water heater to perform heating treatment includes:

[0024] Starting the upper heating pipe in the storage water heater to perform heating;

[0025] The water inlet temperature and the upper limit temperature of the storage water heater are obtained, and when it is determined that the current water outlet temperature is greater than the upper limit temperature, the upper heating pipe is closed and the lower heating pipe in the storage water heater is opened for heating.

[0026] In a specific embodiment, when the water storage water heater is turned on for heating, the method further includes:

[0027] Determine whether the current outlet water temperature is less than the temperature difference. If so, turn off the lower heating pipe in the storage water heater and turn on the heating pipe for heating.

[0028] or,

[0029] When it is determined that the current outlet water temperature is lower than the set temperature, the internal tank temperature is lower than the temperature difference, and the internal tank temperature is lower than the early start limit value, the real-time power margin required for the storage water heater to heat the water temperature to the set temperature is calculated, and it is determined whether the real-time power margin is greater than the pre-stored upper heating tube power. If so, the lower heating tube in the storage water heater is turned off and the upper heating tube is turned on for heating;

[0030] or,

[0031] When it is determined that the current outlet water temperature is lower than the set temperature, the internal temperature is lower than the temperature difference, and the internal temperature is lower than the early start limit value, the outlet water temperature drop rate of the storage water heater is obtained, and it is determined whether the drop rate exceeds the pre-stored drop rate threshold. If so, the lower heating tube in the storage water heater is turned off and the upper heating tube is turned on for heating.

[0032] In a second aspect, the present application provides a heating control device for a storage water heater, comprising:

[0033] The acquisition module is used to obtain the flow value collected by the flow sensor and the time value accumulated by the timer;

[0034] a processing module, configured to obtain the temperature difference between the set temperature and the insulation return difference, and obtain the current outlet water temperature if the flow value is greater than or equal to a preset flow threshold and the time value is greater than or equal to a preset time threshold;

[0035] The processing module is also used to determine whether the current water outlet temperature is less than the temperature difference. If it is determined that the current water outlet temperature is less than the temperature difference, the upper heating pipe in the storage water heater is started for heating.

[0036] In a specific embodiment, the processing module is further configured to obtain the internal temperature of the water storage water heater and a preset early start limit value if it is determined that the current water outlet temperature is not less than the temperature difference value, and determine whether the internal temperature of the water storage water heater is less than the temperature difference value;

[0037] If it is determined that the temperature inside the tank is less than the temperature difference, it is determined whether the temperature inside the tank is less than the preset early limit value;

[0038] If it is determined that the temperature inside the tank is lower than the preset early limit value, the power margin required for the storage water heater to heat the water temperature to the set temperature is obtained;

[0039] When it is determined that the current outlet water temperature is lower than the set temperature and the power margin is greater than the pre-stored upper heating tube power, the upper heating tube in the storage water heater is started for heating.

[0040] In a specific embodiment, the processing module is further configured to start the lower heating tube in the storage water heater for heating if the temperature inside the tank is greater than or equal to the temperature difference;

[0041] or,

[0042] If the temperature inside the tank is greater than or equal to the early limit value, the lower heating pipe in the storage water heater is started for heating;

[0043] or,

[0044] If the outlet water temperature is greater than or equal to the set temperature, the lower heating pipe in the storage water heater is started for heating;

[0045] or,

[0046] If the power margin is less than or equal to the pre-stored upper heating tube power, the lower heating tube in the storage water heater is started for heating.

[0047] In a specific embodiment, the processing device is also specifically used for the processing device to start the upper heating tube in the water storage water heater to perform heating treatment;

[0048] The water inlet temperature and the upper limit temperature of the storage water heater are obtained, and when it is determined that the current water outlet temperature is greater than the upper limit temperature, the upper heating pipe is closed and the lower heating pipe in the storage water heater is opened for heating.

[0049] In a specific embodiment, the processing device is further specifically configured to determine whether the current outlet water temperature is less than the temperature difference value, and if so, to turn off the lower heating tube in the storage water heater and turn on the upper heating tube for heating;

[0050] or,

[0051] When it is determined that the current outlet water temperature is lower than the set temperature, the internal tank temperature is lower than the temperature difference, and the internal tank temperature is lower than the early start limit value, the real-time power margin required for the storage water heater to heat the water temperature to the set temperature is calculated, and it is determined whether the real-time power margin is greater than the pre-stored upper heating tube power. If so, the lower heating tube in the storage water heater is turned off and the upper heating tube is turned on for heating;

[0052] or,

[0053] When it is determined that the current outlet water temperature is lower than the set temperature, the temperature inside the tank is lower than the temperature difference, and the temperature inside the tank is lower than the early start limit value, the rate of decrease of the outlet water temperature of the storage water heater is obtained, and it is determined whether the rate of decrease exceeds the pre-stored rate of decrease threshold. If so, the lower heating tube in the storage water heater is turned off and the upper heating tube is turned on for heating.

[0054] The present application provides a heating control method and device for a storage water heater. The method comprises obtaining a flow rate value collected by a flow sensor and a time value accumulated by a timer. If the flow rate value is greater than or equal to a preset flow rate threshold and the time value is greater than or equal to the preset time threshold, the method obtains the temperature difference between the set temperature and the insulation hysteresis, as well as the current water outlet temperature. The method determines whether the current water outlet temperature is less than the temperature difference. If the current water outlet temperature is less than the temperature difference, the heating tube in the storage water heater is activated to perform heating. Compared with the prior art, the present application adds an outlet water temperature sensor to the outside of the storage water heater so as to obtain the outlet water temperature when the storage water heater is in use. Based on the relationship between the outlet water temperature, the set temperature set by the user, and the preset insulation hysteresis, the method determines whether the storage water heater needs to be heated. If heating is required, the method accurately determines which heating tube to use for heating. This avoids the problem of the water temperature in the inner tank of the storage water heater being too high or too low during use. At the same time, the storage water heater can achieve the effect of increasing the capacity without affecting user use. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0056] Figure 1 A schematic structural diagram of a storage water heater provided in this application;

[0057] Figure 2 A schematic diagram of a heating control method flow for another storage water heater provided in this application;

[0058] Figure 3 A schematic diagram of a heating control method flow for another storage water heater provided in this application;

[0059] Figure 4 A flow chart of a heating control method for a storage water heater provided in this application;

[0060] Figure 5 A flow chart of a heating control method for a storage water heater provided in this application;

[0061] Figure 6This is a schematic diagram of the heating control device structure of a storage water heater provided in this application.

[0062] In the accompanying drawings: 1. Storage-type water heater; 101. Inner tank; 102. Lower heating tube; 103. Temperature sensor in the tank; 104. Upper heating tube; 105. Water outlet pipe; 106. Water inlet pipe; 107. Hot water outlet of the whole machine; 108. Cold water inlet of the whole machine; 109. Flow sensor; 110. Water outlet temperature difference sensor; 111. Inner tank outlet; 112. Inner tank inlet. DETAILED DESCRIPTION

[0063] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0064] Storage water heaters are the most common water heaters in daily life, like solar water heaters and electric water heaters. Since the amount of hot water in the tank of a storage water heater is limited, users hope to mix more cold water with the water in the tank when using the storage water heater. At the same time, they also hope to ensure that the water outlet temperature of the storage water heater is within the preset temperature range while mixing more cold water. This has become a hot topic of research for researchers in this field.

[0065] In the prior art, in order to enable the storage water heater to achieve the effect of increasing capacity during use, the capacity increase effect is usually achieved based on the relationship between the temperature difference between the temperature inside the tank and the set temperature and the preset temperature threshold. That is, when the temperature difference is less than the preset temperature threshold, it indicates that the temperature inside the tank is still within the set temperature range, which is sufficient to mix enough cold water, so no heating treatment is performed; when the temperature difference is greater than the preset temperature threshold, it indicates that the temperature inside the tank is not within the set temperature range, that is, the temperature value inside the tank is not sufficient to mix enough cold water, so heating treatment is required.

[0066] However, since the temperature value inside the tank is collected from the temperature value of the middle area of ​​the tank, when the storage water heater mixes cold water during use, the cold water flows upward, and after mixing the hot water on the upper part, the water flows downward. In addition, the temperature value collected by the temperature sensor inside the tank has a lag, which makes the obtained temperature difference inaccurate, and further leads to the control of whether to perform heating treatment based on the size relationship between the temperature difference and the preset temperature threshold is not accurate enough. It is very easy for the water temperature to fluctuate during the use of the storage water heater.

[0067] Based on this, the technical concept of the heating control method of the water storage water heater provided in this application is: how to reasonably control the heating treatment mode of the water storage water heater to achieve the purpose of both capacity increase and ensuring that the temperature of the water outlet of the water storage water heater is at a constant temperature.

[0068] Figure 1 A schematic diagram of the structure of a water storage water heater provided in this application is shown in FIG. Figure 1 As shown, the water storage water heater 10 includes: 101, inner tank; 102, lower heating tube; 103, tank temperature sensor; 104, upper heating tube; 105, water outlet pipe; 106, water inlet pipe; 107, hot water outlet of the whole machine; 108, cold water inlet of the whole machine; 109, flow sensor; 110, outlet water temperature difference sensor; 111, inner tank outlet; 112, inner tank inlet.

[0069] Among them, the lower heating tube 102, the temperature sensor 103 inside the tank, the upper heating tube 104, the water outlet pipe 105, the water inlet pipe 106, the water outlet 111 inside the tank and the water inlet 112 inside the tank are all located in the inner tank 101; the temperature sensor 103 inside the tank and the lower heating tube 102 are connected to the flange of the inner tank 101; the upper heating tube 104 is located above the water outlet pipe 105 and is close to the water outlet 111 of the inner tank; the flow sensor 109 is placed at a position slightly below the water inlet 108 of the whole machine on the water inlet pipe 106; the water outlet temperature sensor is placed near the hot water outlet 107 of the whole machine on the water outlet pipe 105.

[0070] It should be noted that, since the pressure in the inner tank 101 of the storage water heater is stable, the water inlet flow rate value detected by the flow sensor 109 is equal to the flow rate value at the hot water outlet of the whole machine.

[0071] In addition, it should be noted that the power of the upper heating tube in the water storage water heater provided in this application is greater than the heating power of the lower heating tube.

[0072] based on Figure 1 The structure of the provided storage water heater can select the lower heating tube 102 or the upper heating tube 104 for corresponding heating treatment in different situations to achieve capacity increase and maintain constant temperature during the use of the storage water heater.

[0073] Example 1

[0074] Figure 2 This is a schematic diagram of another heating control method flow of a storage water heater provided by the present application. Figure 2 As shown, the heating control method includes:

[0075] Step 201: Obtain the flow value collected by the flow sensor and the time value accumulated by the timer.

[0076] In this embodiment, a flow sensor installed near the cold water inlet of the water storage water heater collects the water inlet flow value in real time. Since the water inlet flow value is equal to the water outlet flow value, the flow meter sensor is used to detect whether the water storage water heater is in use; a timer installed near the flow meter is used to accumulate the water outlet time at the water outlet of the water storage water heater, that is, the timer is used to detect the usage time of the water storage water heater.

[0077] Based on this, according to the values ​​collected by the flow sensor and the timer, it can be specifically determined whether the storage water heater is used temporarily or continuously.

[0078] Step 202: If the flow rate value is greater than or equal to the preset flow rate threshold, and the time value is greater than or equal to the preset time threshold, the temperature difference between the set temperature and the insulation return difference is obtained, and the current outlet water temperature is obtained.

[0079] In this embodiment, the water storage water heater stores a preset flow threshold and a preset time threshold. These two preset thresholds can be set according to the user's usage habits or based on big data statistical technology. This embodiment does not impose specific restrictions on this.

[0080] Specifically, when the flow value collected by the flow sensor reaches a preset flow threshold, a timer near the flow meter will be triggered to start timing, and when the accumulated time value of the timer reaches the preset time threshold, it is determined that the water storage water heater is in a continuous use state, and it is confirmed that the water storage water heater has entered the dynamic heating mode. In this dynamic heating mode, it is necessary to determine whether to perform heating treatment. If heating treatment is required, it is also necessary to determine whether to control the upper heating tube or the lower heating tube for heating treatment.

[0081] Alternatively, when the flow sensor detects a flow value, the timer is immediately triggered to start timing. When it is determined that both the flow value and the time value reach corresponding preset thresholds, it is determined that the storage water heater enters the dynamic heating mode.

[0082] Among them, the dynamic heating mode mentioned above can be understood as: during the use of the water storage water heater, the water outlet temperature may no longer be within the set temperature range preset by the user, and it is necessary to control the upper heating tube or the lower heating tube in the inner tank for heating treatment. While meeting the water temperature, it can also achieve the effect of increasing capacity. It can be understood more intuitively as: the water storage water heater also needs to be heated while it is in use.

[0083] When it is determined that the storage water heater enters the dynamic heating mode, the set temperature and the insulation return difference stored in the storage water heater are obtained, and the temperature difference between the set temperature and the insulation return difference is calculated.

[0084] Among them, the set temperature is specifically the target heating temperature set by the user, which can be set by the user through the control panel or the mobile phone terminal; the insulation return difference is specifically the maximum amplitude value of the water temperature allowed to drop by the water storage water heater when the water storage water heater heats the water in the inner tank to the set temperature and enters the insulation process.

[0085] If the set temperature is 50℃, after the storage water heater heats the water in the inner tank to 50℃ and enters the insulation treatment, the maximum allowable drop in the water temperature in the tank is 4℃. When the storage water heater is in the insulation treatment, the temperature value in the inner tank of the storage water heater is between 46℃ and 50℃.

[0086] In addition, the storage water heater also needs to collect the current outlet water temperature by obtaining the outlet water temperature sensor located near the hot water outlet of the whole machine on the outlet pipe to determine whether to start the heating process.

[0087] Step 203: determine whether the current outlet water temperature is less than the temperature difference; if it is determined that the current outlet water temperature is less than the temperature difference, start the upper heating pipe in the storage water heater for heating.

[0088] In this embodiment, the storage water heater compares the current outlet water temperature with the temperature difference, and determines whether to start the heating process based on the comparison result.

[0089] Specifically, when the storage water heater determines that the current outlet water temperature is less than the temperature difference, it indicates that the water temperature in the inner tank of the storage water heater is lower than the minimum temperature allowed, and the heating pipe needs to be started for heating.

[0090] Since the water temperature in the inner tank of the storage water heater is lower than the lowest temperature during insulation, and the heating power of the upper heating tube is greater than the heating power of the lower heating tube, if you want to reach the set temperature value in a short time, you need to start the upper heating tube for heating.

[0091] In this embodiment, a heating control method for a storage water heater is provided. The method comprises obtaining a flow rate value collected by a flow sensor and a time value accumulated by a timer. If the flow rate value is greater than or equal to a preset flow rate threshold and the time value is greater than or equal to the preset time threshold, the method then obtains the temperature difference between the set temperature and the insulation return difference, as well as the current water outlet temperature. The method then determines whether the current water outlet temperature is less than the temperature difference. If the current water outlet temperature is less than the temperature difference, the method activates a heating tube in the storage water heater to perform heating. Compared to the prior art, the method provided in this embodiment first determines whether the water heater is in a continuously used operating state. If the continuously used state is determined, the method further determines whether the current water temperature in the tank requires heating. If heating is required, if the current water outlet temperature is less than the minimum allowable temperature, the method activates the upper heating tube to perform heating. This method achieves heating the water temperature to the set temperature in a short period of time and achieves capacity expansion. At the same time, the method further provides more accurate water temperature control, preventing users from experiencing problems with excessively high or low water outlet temperatures when using the storage water heater.

[0092] Example 2

[0093] Based on Example 1, Figure 3 This is a schematic diagram of a heating control method flow for another storage water heater provided by this application, such as Figure 3 As shown, this embodiment specifically describes that after step 202 of the above embodiment 1, the heating control method may further include:

[0094] Step 301: When it is determined that the current outlet water temperature is greater than or equal to the temperature difference, it is determined whether the current outlet water temperature is less than the set temperature.

[0095] Specifically, when the water storage water heater determines that the current vehicle speed and temperature are greater than or equal to the temperature difference, that is, when the water storage water heater determines that the current water outlet temperature is not lower than the minimum temperature allowed during insulation, that is, the current water outlet temperature of the water storage water heater is within the fluctuation range of the set temperature, in this case, it is also necessary to determine whether the current water outlet temperature is lower than the set temperature. If it is lower, steps 302 to 306 need to be executed to further determine whether to start the upper heating pipe for heating.

[0096] Step 302: Obtain the internal temperature of the water storage water heater and a preset early start limit value.

[0097] Step 303: Determine whether the temperature inside the tank is less than the temperature difference.

[0098] Specifically, the storage water heater needs to obtain the internal temperature of the tank through the internal temperature sensor and the preset early start limit value in the storage water heater.

[0099] Among them, the water temperature in the inner tank of the water storage water heater changes from large to small from the top to the bottom of the inner tank, and the temperature sensor inside the tank detects the relatively moderate water temperature distributed in the middle layer of the inner tank of the water storage water heater; the preset early start limit refers to one of the judgment bases for starting the upper heating tube, that is, when the current water outlet temperature reaches the start limit value, the upper heating tube may be turned on for heating.

[0100] More specifically, the storage water heater determines whether the obtained temperature value inside the tank is less than the temperature difference. In essence, it determines whether the water temperature of the middle layer inside the tank is less than the lowest temperature during insulation. If the water temperature value of the middle layer inside the tank is lower than the lowest temperature during insulation, the temperature value at the bottom of the tank must be lower than the lowest temperature during insulation. Therefore, in this case, it may be necessary to turn on the upper heating tube for heating treatment. However, in order to make the heating treatment more accurate, it is necessary to continue to execute step 304 to determine whether to start the upper heating tube for heating treatment.

[0101] Step 304: Determine whether the temperature inside the tank is less than a preset early start limit value.

[0102] When the storage water heater determines that the temperature inside the tank is lower than the temperature difference, it is also necessary to obtain the early limit value, and then determine whether the temperature inside the tank is lower than the early limit value, that is, the temperature of the middle layer of the storage water heater has reached the condition for starting the upper heating tube for heating treatment. When the temperature inside the tank is lower than the preset early start limit value, it is necessary to execute steps 305 to 306 to further determine whether to start the upper heating tube for heating treatment.

[0103] Step 305: Obtain the power margin required by the storage water heater to heat the water to the set temperature.

[0104] Step 306: Determine whether the required power margin is greater than the pre-stored upper heating tube power.

[0105] Specifically, the storage water heater has the upper heating power pre-stored therein, and the power of the upper heating tube may be limited at the factory according to different heating tube materials, but is not limited to this method.

[0106] The storage water heater also needs to confirm the power margin required to heat the water temperature in the storage water heater tank to a preset temperature at the current water outlet temperature, and compare the required power margin obtained with the pre-stored power of the upper heating tube to determine whether the required power is greater than the pre-stored power of the upper heating tube, so as to prevent the occurrence of a phenomenon in which the water outlet temperature is too high due to the use of a larger heating power when heating with the upper heating tube.

[0107] Among them, the specific implementation method of the above-mentioned power margin in this embodiment includes but is not limited to: calculated according to the formula "4.2*average flow value*(set temperature-current water outlet temperature) / 60", where 4.2 in the formula represents the specific heat capacity of water; the average flow value is obtained based on the flow sensor and usage time.

[0108] When it is determined that the required power is greater than the pre-stored upper heating tube power, step 307 is executed.

[0109] Step 307: Start the upper heating pipe in the storage water heater to perform heating.

[0110] Specifically, the storage water heater controls the upper heating pipe to perform heating processing.

[0111] Based on this, the above heating control method also includes: when it is determined that the current water outlet temperature is greater than or equal to the temperature difference, when any of the judgment conditions in the above steps 301, 303, 304, and 306 cannot be met, step 308 needs to be executed.

[0112] Step 308: Start the lower heating pipe in the storage water heater to perform heating.

[0113] Specifically, when the storage water heater determines that the current water outlet temperature is greater than or equal to the set temperature, or the temperature inside the tank is greater than or equal to the temperature difference, or the temperature inside the tank is greater than or equal to the early limit value, or the power margin is less than or equal to the pre-stored upper heating tube power, step 308 is executed, that is, the lower heating tube is turned on for heating.

[0114] It can be understood that when the water storage water heater determines that steps 301, 303, 304, and 306 are not satisfied, that is, when the upper heating tube is used for heating treatment, the water outlet temperature of the whole hot water outlet of the water storage water heater will be too high, so the lower heating tube with smaller heating power is used for heating treatment.

[0115] In this embodiment, the storage water heater turns on the upper heating tube for heating when it determines, one by one, whether the internal temperature of the water tank is less than the temperature difference, the current outlet water temperature is less than the set temperature, the internal temperature of the water tank is less than the preset early start limit, and whether the required power margin is greater than the pre-stored upper heating tube power. If the current outlet water temperature is less than the temperature difference, it is impossible to accurately determine whether to turn on the upper heating tube for heating. In this case, the aforementioned multiple factors are considered, and when the multiple factors are simultaneously met, the upper heating tube is controlled to perform heating. Furthermore, if it is determined that any of the multiple factors cannot be met, the lower heating tube is turned on for heating. This heating control method is more accurate and prevents users from experiencing overheating when using the storage water heater.

[0116] Example 3

[0117] Based on the above embodiment 1 or embodiment 2, Figure 4 A flow chart of a heating control method for a storage water heater provided in this application is shown as follows: Figure 4 As shown, after executing step 203 of the first embodiment or step 307 of the second embodiment, the method further includes:

[0118] Step 401: Start the upper heating tube in the storage water heater to perform heating.

[0119] Specifically, the storage water heater first starts the upper heating pipe for heating so that the outlet water temperature of the storage water heater reaches the set temperature. However, in order to avoid overheating, step 402 needs to be executed to ensure that the outlet water temperature of the storage water heater meets the user's needs.

[0120] Step 402: Obtain the water inlet temperature and upper limit temperature of the storage water heater, and when it is determined that the current water outlet temperature is greater than the upper limit temperature, turn off the upper heating tube and turn on the lower heating tube in the storage water heater for heating.

[0121] Specifically, the storage water heater needs to obtain the inlet temperature and the upper limit temperature, and then determine whether to stop the heating process of the upper heating tube according to the current outlet water temperature and the upper limit temperature.

[0122] Among them, the above-mentioned inlet water temperature can be collected by a temperature sensor set at the water inlet, or the average inlet water temperature obtained by analyzing a large number of inlet water temperatures based on big data technology. In this embodiment, there is no specific restriction on the specific implementation method of the inlet water temperature.

[0123] The above-mentioned upper limit temperature value specifically refers to the maximum temperature allowed to be reached after the water temperature in the inner tank exceeds the set temperature during the heating process of the storage water heater, and the upper limit temperature can be pre-set or obtained according to the formula "(set temperature-inlet water temperature) / allowable overshoot ratio constant". The allowable overshoot ratio constant is usually taken as 10. The specific implementation method of obtaining the upper limit temperature in this embodiment is not specifically limited.

[0124] Furthermore, when it is determined that the outlet water temperature is greater than the upper limit temperature, the upper heating tube is turned off and at the same time, the lower heating tube is turned on for heating treatment.

[0125] In this embodiment, taking into account the possibility that the water temperature in the inner tank of the water storage water heater may be overheated when the upper heating tube is heated, a control method for switching the upper heating tube in the water storage water heater to the lower heating tube is provided, which makes the heating control more accurate and can also meet the user's water needs.

[0126] Example 4

[0127] Based on the above-mentioned embodiments 1 to 3, Figure 5 This is a schematic diagram of a heating control method flow for another storage water heater provided by this application, such as Figure 5 As shown, when the storage water heater turns on the lower heating tube for heating, in order to ensure that the water outlet temperature can satisfy the user, the heating control method also includes: further determining whether to turn off the lower heating tube and turn on the upper heating tube by executing step 501 or executing step 503.

[0128] Step 501 , determine whether the current outlet water temperature is less than the temperature difference value. If so, execute step 502 ; if not, execute step 503 .

[0129] Step 502: close the lower heating tube in the storage water heater and open the upper heating tube for heating.

[0130] Step 503: Keep the lower heating pipe in the storage water heater open for heating.

[0131] Specifically, when the storage water heater is heating the lower heating tube, to prevent the temperature inside the tank from dropping too low due to the mixing of cold water, it is necessary to determine whether the current outlet water temperature is less than the temperature difference, that is, to determine whether the current outlet water temperature is within the set temperature range. If the current outlet water temperature is less than the temperature difference, to ensure the user's water temperature, the lower heating tube is controlled to stop heating and the upper heating tube is turned on for heating. If the current outlet water temperature is greater than or equal to the temperature difference, it indicates that the outlet water temperature in the storage water heater remains within the set temperature range. Therefore, keeping the lower heating tube in the storage water heater turned on for heating can meet the user's needs.

[0132] Step 504: If it is determined that the current outlet water temperature is lower than the set temperature, the internal temperature is lower than the temperature difference, and the internal temperature is lower than the early start limit, then execute steps 505 to 506 or 507 to 508 to further determine whether to turn off the lower heating tube and turn on the upper heating tube.

[0133] Specifically, when the storage water heater detects that the current water outlet temperature is lower than the set temperature, the temperature inside the tank is lower than the temperature difference, and the temperature inside the tank is lower than the early start limit value, it indicates that the current water outlet temperature is no longer within the set temperature range, and there is a possibility of turning on the upper heating tube. However, in order to prevent the upper heating tube from heating the water temperature to too high a temperature, it is necessary to further execute steps 505 to 506 or execute steps 507 to 508 to confirm.

[0134] Step 505: Calculate the real-time power margin required by the storage water heater to heat the water to the set temperature.

[0135] Step 506 , determining whether the real-time power margin is greater than the pre-stored upper heating tube power; if so, executing step 502 ; if not, executing step 503 .

[0136] Specifically, according to the calculation method of the required power margin mentioned in the aforementioned embodiment 2, the real-time power margin required to heat the water temperature in the inner tank to the set temperature is calculated. When it is determined that the real-time power margin exceeds the pre-stored upper heating tube power, it is determined that the use of the real-time power margin will not overheat the water temperature in the inner tank, so the lower heating tube is turned off and the upper heating tube is turned on to ensure that the current water outlet temperature is not too low.

[0137] Step 507: Get the rate of decrease of the current outlet water temperature of the storage water heater.

[0138] Step 508 , determine whether the descent rate exceeds a pre-stored descent rate threshold; if so, execute step 502 ; if not, execute step 503 .

[0139] Specifically, the storage water heater has a pre-stored falling speed threshold, which is used as a basis for determining whether the outlet water temperature drops too quickly, and can be pre-set in the storage water heater by a technician in this field.

[0140] More specifically, the current water outlet temperature and the water outlet temperature when the lower heating tube is started for heating, as well as the heating treatment time of the lower heating tube are obtained, the current water outlet temperature drop rate is calculated, and when it is judged that the current water outlet temperature drop rate is greater than the pre-stored drop rate threshold, that is, when it is judged that the current water outlet temperature value is too low, the lower heating tube is turned off and the upper heating tube is turned on for heating treatment.

[0141] In this embodiment, considering that the water temperature in the inner tank of the water storage water heater may be too low when the lower heating tube is heated, a control method for switching the lower heating tube in the water storage water heater to the upper heating tube is provided, which makes the heating control more accurate.

[0142] Example 5

[0143] Figure 6 This is a flow chart of a heating control device structure of a storage water heater provided in this application, such as Figure 6 As shown, the heating control device 60 includes an acquisition module 61 and a processing module 62. The acquisition module 61 is used to acquire the flow rate value collected by the flow sensor and the time value accumulated by the timer; the processing module 62 is used to acquire the temperature difference between the set temperature and the insulation return difference, as well as the current outlet water temperature, if the flow rate value is greater than or equal to a preset flow rate threshold and the time value is greater than or equal to the preset time threshold. The processing module 62 is also used to determine whether the current outlet water temperature is less than the temperature difference. If the current outlet water temperature is less than the temperature difference, the upper heating pipe in the storage water heater is activated for heating.

[0144] Optionally, the processing module 62 is also specifically used to determine whether the current water outlet temperature is less than the set temperature if it is determined that the current water outlet temperature is greater than or equal to the temperature difference; if it is determined that the current water outlet temperature is less than the set temperature, obtain the temperature inside the tank of the water storage water heater and the preset early start limit value, and determine whether the temperature inside the tank is less than the temperature difference; if it is determined that the temperature inside the tank is less than the temperature difference, determine whether the temperature inside the tank is less than the preset early limit value; if it is determined that the temperature inside the tank is less than the preset early limit value, obtain the power margin required for the water storage water heater to heat the water temperature to the set temperature, and determine whether the required power margin is greater than the pre-stored upper heating tube power; if the power margin is greater than the pre-stored upper heating tube power, start the upper heating tube in the water storage water heater for heating processing.

[0145] Optionally, the processing module 62 is also specifically used to start the lower heating tube in the water storage water heater for heating treatment if the current water outlet temperature is greater than or equal to the set temperature; or, if the temperature inside the tank is greater than or equal to the temperature difference, start the lower heating tube in the above-mentioned water storage water heater for heating treatment; or, if the temperature inside the tank is greater than or equal to the early limit value, start the lower heating tube in the water storage water heater for heating treatment; or, if the power margin is less than or equal to the pre-stored upper heating tube power, start the lower heating tube in the water storage water heater for heating treatment.

[0146] Optionally, the processing module 62 is also specifically used to start the upper heating tube in the water storage water heater for heating treatment; obtain the water inlet temperature and upper limit temperature of the water storage water heater, and when it is determined that the current water outlet temperature is greater than the upper limit temperature, turn off the upper heating tube and turn on the lower heating tube in the water storage water heater for heating treatment.

[0147] Optionally, the processing module 62 is further specifically used to determine whether the current water outlet temperature is less than the temperature difference. If so, the lower heating tube in the storage water heater is turned off and the heating tube is turned on for heating. Alternatively, when it is determined that the current water outlet temperature is less than the set temperature, the temperature inside the tank is less than the temperature difference, and the temperature inside the tank is less than the early start limit, the real-time power margin required for the storage water heater to heat the water temperature to the set temperature is calculated, and it is determined whether the real-time power margin is greater than the pre-stored upper heating tube power. If so, the lower heating tube in the storage water heater is turned off and the heating tube is turned on for heating. Alternatively, when it is determined that the current water outlet temperature is less than the set temperature, the temperature inside the tank is less than the temperature difference, and the temperature inside the tank is less than the early start limit, the rate of decrease of the water outlet temperature of the storage water heater is obtained, and it is determined whether the rate of decrease exceeds the pre-stored rate of decrease threshold. If so, the lower heating tube in the storage water heater is turned off and the heating tube is turned on for heating.

[0148] The present application provides a heating control device for a water storage water heater, which obtains the flow value collected by a flow sensor and the time value accumulated by a timer; if the flow value is greater than or equal to a preset flow threshold, and the time value is greater than or equal to the preset time threshold, then obtains the temperature difference between the set temperature and the insulation return difference, and obtains the current water outlet temperature; determines whether the current water outlet temperature is less than the temperature difference; if it is determined that the current water outlet temperature is less than the temperature difference, then starts the heating pipe in the water storage water heater for heating treatment. Compared with the prior art, the present application adds a water outlet temperature sensor outside the water storage water heater so as to obtain the water outlet temperature when the water storage water heater is used. According to the water outlet temperature, the set temperature set by the user and the preset insulation hysteresis, and other parameters related to the temperature inside the water storage water heater tank, such as the power of the heating tube, the temperature value inside the tank, etc., the relationship between these factors is comprehensively considered to determine whether the water storage water heater needs to be heated. If heating is required, it is accurately determined which heating tube to use for heating. This avoids the problem of the temperature of the water in the heating tank of the water storage water heater being too high or too low during use. At the same time, it can also achieve the effect of increasing the capacity of the water storage water heater without affecting the user's use.

[0149] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A heating control method for a storage water heater, characterized in that: include: Obtain the flow value collected by the flow sensor and the time value accumulated by the timer; If the flow rate value is greater than or equal to the preset flow rate threshold, and the time value is greater than or equal to the preset time threshold, then obtaining the temperature difference between the set temperature and the insulation return difference, and obtaining the current water outlet temperature; determining whether the current outlet water temperature is less than the temperature difference; if so, activating an upper heating pipe located above the outlet water pipe of the storage water heater to perform heating; If it is determined that the current outlet water temperature is greater than or equal to the temperature difference, then determining whether the current outlet water temperature is less than the set temperature; If it is determined that the current water outlet temperature is lower than the set temperature, obtaining the internal temperature of the water storage water heater and a preset early start limit value, and determining whether the internal temperature is lower than the temperature difference; If it is determined that the temperature inside the tank is less than the temperature difference, then determining whether the temperature inside the tank is less than the preset early limit value; If it is determined that the temperature inside the tank is lower than the preset early limit value, the power margin required for the storage water heater to heat the water temperature to the set temperature is obtained, and it is determined whether the required power margin is greater than the pre-stored upper heating tube power; If the power margin is greater than the pre-stored upper heating tube power, the upper heating tube in the storage water heater is started for heating.

2. The heating control method according to claim 1, characterized in that: Also includes: If the current outlet water temperature is greater than or equal to the set temperature, the lower heating pipe in the storage water heater is started to perform heating; or, If the temperature inside the tank is greater than or equal to the temperature difference, the lower heating pipe in the storage water heater is started to perform heating; or, If the temperature inside the tank is greater than or equal to the early limit value, the lower heating pipe in the storage water heater is started to perform heating; or, If the power margin is less than or equal to the pre-stored upper heating tube power, the lower heating tube in the storage water heater is started for heating.

3. The heating control method according to claim 1, characterized in that: The step of starting the heating pipe in the storage water heater to perform heating includes: Starting the upper heating pipe in the storage water heater to perform heating treatment; The water inlet temperature and the upper limit temperature of the water storage water heater are obtained, and when it is determined that the current water outlet temperature is greater than the upper limit temperature, the upper heating tube is closed and the lower heating tube in the water storage water heater is opened for heating.

4. The heating control method according to claim 2, characterized in that: When the water storage water heater is turned on for heating, the method further comprises: Determine whether the current outlet water temperature is less than the temperature difference; if so, turn off the lower heating pipe in the storage water heater and turn on the upper heating pipe for heating; or, When it is determined that the current outlet water temperature is lower than the set temperature, the internal tank temperature is lower than the temperature difference, and the internal tank temperature is lower than the early start limit value, a real-time power margin required for the storage water heater to heat the water temperature to the set temperature is calculated, and it is determined whether the real-time power margin is greater than the pre-stored upper heating tube power. If so, the lower heating tube in the storage water heater is turned off and the upper heating tube is turned on for heating. or, When it is determined that the current water outlet temperature is lower than the set temperature, the temperature inside the tank is lower than the temperature difference, and the temperature inside the tank is lower than the early start limit value, the rate of decrease of the water outlet temperature of the storage water heater is obtained, and it is determined whether the rate of decrease exceeds the pre-stored rate of decrease threshold. If so, the lower heating tube in the storage water heater is turned off and the upper heating tube is turned on for heating.

5. A heating control device for a storage water heater, characterized in that: include: The acquisition module is used to obtain the flow value collected by the flow sensor and the time value accumulated by the timer; a processing module, configured to obtain a temperature difference between a set temperature and a heat preservation return difference, and obtain a current outlet water temperature if the flow value is greater than or equal to a preset flow threshold and the time value is greater than or equal to a preset time threshold; The processing module is further configured to determine whether the current outlet water temperature is less than the temperature difference, and if it is determined that the current outlet water temperature is less than the temperature difference, activate an upper heating pipe located above the outlet pipe of the storage water heater to perform heating; The processing module is further specifically configured to determine whether the current outlet water temperature is less than the set temperature if it is determined that the current outlet water temperature is greater than or equal to the temperature difference; If it is determined that the current water outlet temperature is lower than the set temperature, obtaining the internal temperature of the water storage water heater and a preset early start limit value, and determining whether the internal temperature is lower than the temperature difference; If it is determined that the temperature inside the tank is less than the temperature difference, then determining whether the temperature inside the tank is less than the preset early limit value; If it is determined that the temperature inside the tank is lower than the preset early limit value, the power margin required for the storage water heater to heat the water temperature to the set temperature is obtained, and it is determined whether the required power margin is greater than the pre-stored upper heating tube power; If the power margin is greater than the pre-stored upper heating tube power, the upper heating tube in the storage water heater is started for heating.

6. The heating control device according to claim 5, characterized in that: The processing module is further specifically configured to start the lower heating pipe in the storage water heater for heating if the current outlet water temperature is greater than or equal to the set temperature; or, If the temperature inside the tank is greater than or equal to the temperature difference, the lower heating pipe in the storage water heater is started to perform heating; or, If the temperature inside the tank is greater than or equal to the early limit value, the lower heating pipe in the storage water heater is started to perform heating; or, If the power margin is less than or equal to the pre-stored upper heating tube power, the lower heating tube in the storage water heater is started for heating.

7. The heating control device according to claim 5, characterized in that: The processing module is further specifically used to start the upper heating pipe in the water storage water heater to perform heating treatment; The water inlet temperature and upper limit temperature of the water storage water heater are obtained, and when it is determined that the current water outlet temperature is greater than the upper limit temperature, the upper heating tube is closed and the lower heating tube in the water storage water heater is opened for heating.

8. The heating control device according to claim 7, characterized in that: The processing module is further specifically configured to determine whether the current outlet water temperature is less than the temperature difference, and if so, to turn off the lower heating pipe in the storage water heater and turn on the upper heating pipe for heating; or, When it is determined that the current outlet water temperature is lower than the set temperature, the internal tank temperature is lower than the temperature difference, and the internal tank temperature is lower than the early start limit value, a real-time power margin required for the storage water heater to heat the water temperature to the set temperature is calculated, and it is determined whether the real-time power margin is greater than the pre-stored upper heating tube power. If so, the lower heating tube in the storage water heater is turned off and the upper heating tube is turned on for heating. or, When it is determined that the current water outlet temperature is lower than the set temperature, the temperature inside the tank is lower than the temperature difference, and the temperature inside the tank is lower than the early start limit value, the rate of decrease of the water outlet temperature of the storage water heater is obtained, and it is determined whether the rate of decrease exceeds the pre-stored rate of decrease threshold. If so, the lower heating tube in the storage water heater is turned off and the upper heating tube is turned on for heating.

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