Control method and system for preheating water heater, water heater and storage medium

Abstract

The application discloses a kind of water heater preheating control method, system, water heater and storage medium, the method includes: in the outlet temperature is greater than the first preset outlet temperature, control water heater stops preheating;Obtain the initial circulating water volume of circulation pipeline and initial preheating water volume;Judge that cold water flow is equal to zero and outlet temperature is greater than preset inlet temperature, control water heater to reopen preheating;According to initial circulating water volume and the first circulating water volume calculated preset preheating water volume obtained;According to initial preheating water volume or preset preheating water volume, circulation pipeline is preheated.The water heater of the application can perceive user cold water use condition, control user to use cold water after starting preheating cycle;According to initial preheating water volume or the preset preheating water volume calculated to circulation pipeline is preheated, realizes that water heater preheating only needs to preheat certain water volume, and the water volume of entire circulation pipeline does not need to be preheated, reaches energy-saving effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water heater control, in particular to a water heater preheating control method and system, a water heater and a storage medium. BACKGROUND

[0002] The existing water heater with zero cold water function and its water system, after the water pump is running, the water in the circulating pipeline will flow into the water heater for heating, and the water pump will stop running only after the water in the entire circulating pipeline is heated, and the water heater will also stop burning at the same time. Then when the user uses hot water for the first time, since the pipeline has been preheated in advance, the speed of hot water outlet from the faucet is extremely fast, thereby realizing the zero cold water function.

[0003] This preheating method is relatively energy-consuming, especially the water in the circulating pipe from the back end of the one-way valve to the hot water inlet cannot flow out when the user uses hot water. Moreover, the hot water in this section of the circulating pipeline will flow out when the user uses cold water, causing trouble to the user (there is a section of hot water in front when using cold water). Therefore, it is unnecessary to preheat the water in this section of the circulating pipeline. SUMMARY

[0004] The present application aims to solve the technical problem that the preheating method of the existing water heater needs to heat the water in the entire circulating pipeline, resulting in the defect of high energy consumption, and provides a water heater preheating control method and system, a water heater and a storage medium.

[0005] The present application solves the above technical problems by the following technical solutions:

[0006] The present application provides a water heater preheating control method in the first aspect, and the water heater comprises a cold water pipeline, and the control method comprises:

[0007] determining whether the outlet water temperature of the water heater is greater than a first preset outlet water temperature, and if so, controlling the water heater to stop preheating; obtaining an initial circulating water amount and an initial preheating water amount of a circulating pipeline through the cold water pipeline;

[0008] determining whether the cold water flow of the cold water pipeline is equal to zero and whether the outlet water temperature of the water heater is greater than a preset inlet water temperature, and if so, controlling the water heater to restart preheating; obtaining a first circulating water amount of the circulating pipeline through the cold water pipeline;

[0009] calculating a preset preheating water amount according to the initial circulating water amount and the first circulating water amount;

[0010] preheating the circulating pipeline according to the initial preheating water amount or the preset preheating water amount.

[0011] Preferably, after the step of controlling the water heater to restart preheating, the control method further comprises:

[0012] determining whether the water inlet temperature variation value of the water heater is greater than a preset variation value, if yes, controlling the water heater to stop preheating, and obtaining the first circulation water amount of the circulation pipeline; if no, controlling the water heater to restart preheating.

[0013] Preferably, before the step of determining whether the cold water flow of the cold water pipeline is equal to zero and whether the water outlet temperature of the water heater is greater than a preset water inlet temperature, the control method further comprises:

[0014] determining whether the cold water flow of the cold water pipeline is greater than a minimum cold water flow and lasts for at least a preset time, if yes, determining whether the cold water flow of the cold water pipeline is equal to zero and whether the water outlet temperature of the water heater is greater than a preset water inlet temperature; if no, determining whether the water outlet temperature of the water heater is less than a second preset water outlet temperature, if yes, controlling the water heater to perform initial preheating; and preheating the circulation pipeline according to the initial preheating water amount.

[0015] Preferably, the step of preheating the circulation pipeline according to the initial preheating water amount or the preset preheating water amount comprises:

[0016] determining whether the preset preheating water amount is greater than zero and less than the initial preheating water amount, if yes, updating the initial preheating water amount to the preset preheating water amount, and preheating the circulation pipeline according to the preset preheating water amount; if no, keeping the initial preheating water amount unchanged, and preheating the circulation pipeline according to the initial preheating water amount.

[0017] The second aspect of the present application provides a control system for preheating a water heater, the water heater comprising a cold water pipeline, the control system comprising:

[0018] a first determining module configured to determine whether the water outlet temperature of the water heater is greater than a first preset water outlet temperature, if yes, calling a first control module;

[0019] the first control module configured to control the water heater to stop preheating;

[0020] a first obtaining module configured to obtain an initial circulation water amount and an initial preheating water amount of a circulation pipeline through the cold water pipeline;

[0021] a second determining module configured to determine whether the cold water flow of the cold water pipeline is equal to zero and whether the water outlet temperature of the water heater is greater than a preset water inlet temperature, if yes, calling a second control module;

[0022] the second control module configured to control the water heater to restart preheating;

[0023] a second obtaining module, configured to obtain a first circulating water amount of the circulating pipeline through the cold water pipeline;

[0024] a calculating module, configured to calculate a preset preheating water amount according to the initial circulating water amount and the first circulating water amount;

[0025] a first preheating module, configured to preheat the circulating pipeline according to the initial preheating water amount or the preset preheating water amount.

[0026] Preferably, the control system further comprises:

[0027] a third judging module, configured to judge whether a water inlet temperature variation value of the water heater is greater than a preset variation value, if yes, the second obtaining module is invoked; if no, the second control module is invoked;

[0028] the second obtaining module, configured to control the water heater to stop preheating and obtain the first circulating water amount of the circulating pipeline.

[0029] Preferably, the control system further comprises:

[0030] a fourth judging module, configured to judge whether a cold water flow of the cold water pipeline is greater than a minimum cold water flow and lasts at least a preset time, if yes, the second control module is invoked; if no, a fifth judging module is invoked;

[0031] the fifth judging module, configured to judge whether a water outlet temperature of the water heater is less than a second preset water outlet temperature, if yes, a third control module is invoked;

[0032] the third control module, configured to control the water heater to perform initial preheating;

[0033] a second preheating module, configured to preheat the circulating pipeline according to the initial preheating water amount.

[0034] Preferably, the first preheating module comprises:

[0035] a judging unit, configured to judge whether the preset preheating water amount is greater than zero and less than the initial preheating water amount, if yes, a first preheating unit is invoked; if no, a second preheating unit is invoked;

[0036] the first preheating unit, configured to update the initial preheating water amount as the preset preheating water amount and preheat the circulating pipeline according to the preset preheating water amount;

[0037] the second preheating unit, configured to keep the initial preheating water amount unchanged and preheat the circulating pipeline according to the initial preheating water amount.

[0038] The third aspect of the present application provides a water heater, comprising a memory, a processor and a computer program stored in the memory and used for running on the processor, and the processor implements the control method of water heater preheating according to the first aspect when executing the computer program.

[0039] The fourth aspect of the present application provides a computer readable storage medium, which stores a computer program, and the computer program implements the control method of water heater preheating according to the first aspect when executed by a processor.

[0040] On the basis of common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily, thereby obtaining various preferred examples of the present application.

[0041] The positive progress effect of the present application is that:

[0042] The present application obtains the initial circulating water amount and the initial preheating water amount of the circulating pipeline, and controls the water heater to restart preheating when the cold water flow is equal to zero and the outlet water temperature of the water heater is greater than the preset inlet water temperature; obtains the first circulating water amount of the circulating pipeline; calculates the preset preheating water amount according to the initial circulating water amount and the first circulating water amount; and preheats the circulating pipeline according to the initial preheating water amount or the preset preheating water amount, so that only a certain amount of water needs to be preheated when the water heater is preheated, and the entire circulating pipeline does not need to be preheated, thereby achieving the energy-saving effect. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 FIG. 1 is a structural schematic diagram of the water heater of the present application.

[0044] Figure 2 FIG. 2 is a flowchart of the control method of water heater preheating of the present application.

[0045] Figure 3 FIG. 3 is a schematic diagram of the water in the circulating pipeline of the water heater of the present application being heated after the first preheating.

[0046] Figure 4 FIG. 4 is a cold water section schematic diagram of the water heater of the present application.

[0047] Figure 5 FIG. 5 is a structural schematic diagram of the household circulating pipeline matched with the water heater of the present application.

[0048] Figure 6 FIG. 6 is a module schematic diagram of the control system of water heater preheating of the present application.

[0049] Figure 7 FIG. 7 is a structural schematic diagram of the electronic device for implementing the control method of water heater preheating of the present application. DETAILED DESCRIPTION

[0050] The application will be further described in the following by way of examples without limiting the application to the examples described.

[0051] Example 1

[0052] The control method for preheating a water heater provided by the example includes: Figure 1 As shown in the figure, the water heater includes a cold water pipeline 1, a gas proportional valve 2, a first water inlet temperature sensor 3, a first water flow sensor 4, a second water inlet temperature sensor 5, a circulating pump 6, a second water flow sensor 7, a water inlet pipeline 8, an electric control assembly 9, a heat exchanger 10, a water outlet pipeline 11, a burner 12, a fan 13, a water outlet temperature sensor 14, a hot water pipeline 15, a hot water outlet 16, a cold water outlet 17, a water inlet 18, and an air inlet 19. It is to be noted that the cold water pipeline 1 is connected in parallel to the water inlet, and the first water flow sensor 4 and the first water inlet temperature sensor 3 are arranged on the cold water pipeline 1. The cold water pipeline is connected to the cold water outlet 17. In addition, the circulating pump 6 and the second water flow sensor 7 are arranged downstream of the parallel cold water pipeline. The cold water pipeline 1 is the original source of the household cold water pipeline and also serves as a circulating return pipeline of the household pipeline. Therefore, the cold water pipeline 1 can obtain the cold water flow and the circulating water flow. Figure 2 The control method includes:

[0053] Step 101: Determine whether the water outlet temperature of the water heater is greater than a first preset water outlet temperature. If yes, execute step 102; if no, execute step 112.

[0054] In the example, the first preset water outlet temperature is set according to actual conditions, which is not specifically limited here.

[0055] Step 102: Control the water heater to stop preheating.

[0056] Step 103: Obtain the initial circulating water flow and the initial preheating water flow of the circulating pipeline through the cold water pipeline.

[0057] Step 104: Determine whether the cold water flow of the cold water pipeline is greater than a minimum cold water flow and lasts for at least a preset time. If yes, execute step 105; if no, execute step 111.

[0058] In the example, the preset time is set according to actual conditions, which is not specifically limited here.

[0059] Step 105: Determine whether the cold water flow of the cold water pipeline is equal to zero and the water outlet temperature of the water heater is greater than a preset water inlet temperature. If yes, execute step 106; if no, execute step 104.

[0060] In the embodiment, the preset water inlet temperature is set according to actual conditions, which is not specifically limited here.

[0061] Step 106, control the water heater to restart preheating;

[0062] Step 107, judge whether the water inlet temperature change value of the water heater is greater than a preset change value, if yes, execute step 108; if no, execute step 106;

[0063] In the embodiment, the preset change value is set according to actual conditions, which is not specifically limited here.

[0064] Step 108, control the water heater to stop preheating, and obtain the first circulation water amount of the circulation pipeline through the cold water pipeline;

[0065] Step 109, calculate a preset preheating water amount according to the initial circulation water amount and the first circulation water amount;

[0066] In the embodiment, the calculation formula of the preset preheating water amount is: Q y = Q z -Q2

[0067] Wherein, Q y represents the preset preheating water amount, Q z represents the initial circulation water amount, and Q2 represents the first circulation water amount.

[0068] Step 110, preheat the circulation pipeline according to the initial preheating water amount or the preset preheating water amount.

[0069] In the embodiment, only heating to the circulation water amount passing through the first water flow sensor 4 reaches the initial preheating water amount or the preset preheating water amount is needed in the preheating circulation combustion process, so that the energy-saving circulation can be completed, and the water heater stops preheating.

[0070] In the embodiment, the second preset water outlet temperature is set according to actual conditions, which is not specifically limited here.

[0071] It should be noted that the first preset water outlet temperature is greater than the second preset water outlet temperature.

[0072] Step 112, control the water heater to perform initial preheating;

[0073] Step 113, preheat the circulation pipeline according to the initial preheating water amount.

[0074] In an optional embodiment, step 110 includes:

[0075] Step 100-1, judge whether the preset preheating water volume is greater than zero and less than the initial preheating water volume, if yes, execute step 100-2; if no, execute step 100-3;

[0076] Step 100-2, update the initial preheating water volume to the preset preheating water volume, and preheat the circulating pipeline according to the preset preheating water volume;

[0077] Step 100-3, keep the initial preheating water volume unchanged, and preheat the circulating pipeline according to the initial preheating water volume.

[0078] In the specific implementation process, the first preheating after the water heater is powered on is controlled according to a complete preheating cycle, that is, when the outlet water temperature t c is less than the second preset outlet water temperature t s -5, the circulating pump is started, and the water heater is preheated and combusted. During the preheating, the cold water flow rate Q1 of the cold water pipeline is detected by the first water flow sensor 4. When the outlet water temperature t c is greater than the first preset outlet water temperature t s +5, the water heater is controlled to stop preheating combustion. Since the water in the household circulating pipeline is basically circulated at this time, the cold water flow rate Q1 obtained at this time can be defined as the initial circulating water volume Q z , and the initial preheating water volume Q=Q z , and only the circulating water volume passing through the first water flow sensor 4 needs to be heated to the initial preheating water volume Q in the subsequent preheating combustion process, and the water in the circulating pipeline after the first preheating is heated, such as Figure 3 the dashed part.

[0079] After the first preheating of the water heater is completed, before the outlet water temperature drops to the circulating start condition (i.e., the outlet water temperature t c drops below the second preset outlet water temperature t s -5), if the cold water flow rate (i.e., the cold water flow rate Q1 detected by the first water flow sensor 4 is greater than the minimum cold water flow rate Q c ) and lasts for at least a preset time (for example, lasts for s seconds or more), it is considered that the user uses cold water, and when the cold water flow rate is equal to 0, it is indicated that the user stops using cold water. At this time, there must be a long cold water section in the circulating pipeline, such as Figure 4 the dashed part. At this time, it is judged whether the outlet water temperature t c of the water heater is greater than the preset inlet water temperature t j1 +△t detected by the first inlet water temperature sensor 3, if yes, it is indicated that the temperature difference between hot and cold water is large enough to be beneficial to the subsequent logical judgment, and the water heater is immediately controlled to restart the circulating preheating, and the first circulating water volume Q2 passing through at this moment is recorded by the first water flow sensor 4. When the first inlet water temperature sensor 3 detects that the inlet water temperature change value tj1 When the temperature increase reaches or exceeds the preset change value m, it indicates that the cold water section has completed its circulation and the water has entered the hot water section. At this point, the water heater is controlled to immediately stop the preheating cycle, stop recording the first circulating water volume through the first water flow sensor 4, and calculate the preset preheating water volume Q for the subsequent preheating process. y =Q z -Q2. Compare the preset preheated water volume Q y The magnitude of the initial preheating water volume Q, if the preset preheating water volume Q y If the value is greater than zero and less than the initial preheated water volume Q, then update the initial preheated water volume Q to the preset preheated water volume Q. y That is, let Q=Q y In the subsequent preheating and circulating combustion process, it is only necessary to heat the circulating water until the amount of circulating water passing through the first water flow sensor 4 reaches the preset preheating water volume Q. y Until then. If the preset preheating water volume Q... y Greater than the initial preheated water volume Q or the preset preheated water volume Q y If the value is less than 0, the initial preheated water volume Q remains unchanged. During subsequent preheating and combustion processes, heating only needs to continue until the circulating water volume passing through the first water flow sensor 4 reaches the preset preheated water volume Q. This adaptive logic is used primarily because the exact location of the user's cold water tap is uncertain; therefore, an adaptive approach is used to gradually obtain the minimum initial preheated water volume Q. The location of the cold water tap can also be determined.

[0080] It should be noted that the second water flow sensor 7 and the second inlet water temperature sensor 5 are water flow sensors and inlet water temperature sensors used in the normal hot water heating process.

[0081] in addition, Figure 5 This is a general system diagram of the household circulation pipe that matches the structure of the water heater in this embodiment. The difference from a typical household circulation pipe is that the main water inlet pipe is directly connected to the water heater inlet before hot and cold water are separated. The advantage of this structure is that the water heater can monitor both the hot and cold water flow rates used by the user. The first water flow sensor 4 can detect the cold water flow rate in both directions.

[0082] In this embodiment, as Figure 3 , Figure 4 , Figure 5 As shown, the circulation pipeline includes G1 and G2. When preheating the circulation pipeline, it is usually only necessary to preheat a portion of the water volume in the circulation pipeline, and it is not necessary to preheat the entire water volume in the circulation pipeline.

[0083] The water heater of the embodiment has the feature that the use of cold water by a user can be sensed, and the preheating cycle can be controlled to start immediately after the user uses cold water. Specifically, the initial preheating water amount and the initial circulating water amount of the circulating pipeline are obtained, and when it is determined that the cold water flow is equal to zero and the outlet water temperature of the water heater is greater than the preset inlet water temperature, the water heater is controlled to restart preheating. The first circulating water amount of the circulating pipeline is obtained. The preset preheating water amount is calculated according to the initial circulating water amount and the first circulating water amount. The circulating pipeline is preheated according to the initial preheating water amount or the preset preheating water amount, so that when the water heater is preheated, only a certain amount of water needs to be preheated, and the entire circulating pipeline does not need to be preheated, thereby achieving the effect of energy saving.

[0084] Embodiment 2

[0085] The control system for preheating of the water heater provided in the embodiment, as shown in Figure 1 The water heater includes a cold water pipeline 1, a gas proportional valve 2, a first inlet water temperature sensor 3, a first water flow sensor 4, a second inlet water temperature sensor 5, a circulating pump 6, a second water flow sensor 7, an inlet water pipeline 8, an electric control assembly 9, a heat exchanger 10, an outlet water pipeline 11, a burner 12, a fan 13, an outlet water temperature sensor 14, a hot water pipeline 15, a hot water outlet 16, a cold water outlet 17, an inlet 18, and an air inlet 19. It should be noted that the cold water pipeline 1 is connected in parallel at the inlet, and the first water flow sensor 4 and the first inlet water temperature sensor 3 are arranged on the cold water pipeline 1, and finally the cold water pipeline is connected to the cold water outlet 17. In addition, the circulating pump 6 and the second water flow sensor 7 are arranged downstream of the parallel cold water pipeline. The cold water pipeline 1 is the initial source of the household cold water pipeline and also serves as the circulating return pipeline of the household pipeline. Therefore, the cold water pipeline 1 can obtain the cold water flow and the circulating water amount; as shown in Figure 6 The control system includes a first determination module 21, a first control module 22, a first acquisition module 23, a second determination module 24, a second control module 25, a second acquisition module 26, a calculation module 27, and a first preheating module 28.

[0086] The first determination module 21 is configured to determine whether the outlet water temperature of the water heater is greater than a first preset outlet water temperature. If yes, the first control module 22 is called.

[0087] In the embodiment, the first preset outlet water temperature is set according to actual conditions, which is not specifically limited here.

[0088] The first control module 22 is configured to control the water heater to stop preheating.

[0089] The first acquisition module 23 is configured to obtain the initial circulating water amount and the initial preheating water amount of the circulating pipeline through the cold water pipeline.

[0090] The second determining module 24 is configured to determine whether the cold water flow of the cold water pipeline is equal to zero and whether the outlet water temperature of the water heater is greater than the preset inlet water temperature, and if so, the second control module 25 is invoked.

[0091] In this embodiment, the preset inlet water temperature is set according to actual conditions, which is not specifically limited here.

[0092] The second control module 25 is configured to control the water heater to restart preheating.

[0093] The second obtaining module 26 is configured to obtain the first circulating water amount of the circulating pipeline through the cold water pipeline.

[0094] The calculating module 27 is configured to calculate the preset preheating water amount according to the initial circulating water amount and the first circulating water amount.

[0095] In this embodiment, the calculation formula of the preset preheating water amount is: Q y = Q z -Q2

[0096] Wherein, Q y represents the preset preheating water amount, Q z represents the initial circulating water amount, and Q2 represents the first circulating water amount.

[0097] The first preheating module 28 is configured to preheat the circulating pipeline according to the initial preheating water amount or the preset preheating water amount.

[0098] In this embodiment, in the preheating circulating combustion process, only the circulating water amount passing through the first water flow sensor 4 needs to be heated to the initial preheating water amount or the preset preheating water amount, and then the energy-saving circulation can be completed, and the water heater stops preheating.

[0099] In an optional embodiment, as shown in Figure 6 , the control system further includes a third determining module 29.

[0100] The third determining module 29 is configured to determine whether the inlet water temperature change value of the water heater is greater than a preset change value, and if so, the second obtaining module 26 is invoked; if not, the second control module 25 is invoked.

[0101] In this embodiment, the preset change value is set according to actual conditions, which is not specifically limited here.

[0102] The second obtaining module 26 is configured to control the water heater to stop preheating, and obtain the first circulating water amount of the circulating pipeline through the cold water pipeline.

[0103] In an optional embodiment, as shown in Figure 6 , the control system further includes a fourth determining module 291, a fifth determining module 292, a third control module 293, and a second preheating module 294.

[0104] The fourth judging module 291 is configured to judge whether the cold water flow of the cold water pipeline is greater than the minimum cold water flow and lasts for at least a preset time, and if yes, the second control module 25 is called; if no, the fifth judging module 292 is called.

[0105] In the embodiment, the preset time is set according to actual conditions, which is not specifically limited here.

[0106] The fifth judging module 292 is configured to judge whether the outlet water temperature of the water heater is less than a second preset outlet water temperature, and if yes, the third control module 293 is called.

[0107] In the embodiment, the second preset outlet water temperature is set according to actual conditions, which is not specifically limited here.

[0108] It should be noted that the first preset outlet water temperature is greater than the second preset outlet water temperature.

[0109] The third control module 293 is configured to control the water heater to perform initial preheating.

[0110] The second preheating module 294 is configured to preheat the circulating pipeline according to the initial preheating water amount.

[0111] In an optional embodiment, as shown in Figure 6 The first preheating module 28 includes a judging unit 281, a first preheating unit 282 and a second preheating unit 283.

[0112] The judging unit 281 is configured to judge whether a preset preheating water amount is greater than zero and less than an initial preheating water amount, and if yes, the first preheating unit 282 is called; if no, the second preheating unit 283 is called.

[0113] The first preheating unit 282 is configured to update the initial preheating water amount to the preset preheating water amount, and preheat the circulating pipeline according to the preset preheating water amount.

[0114] The second preheating unit 283 is configured to keep the initial preheating water amount unchanged, and preheat the circulating pipeline according to the initial preheating water amount.

[0115] In the specific implementation process, the first preheating after the water heater is powered on is controlled according to a complete preheating cycle, that is, when the outlet water temperature t c is less than the second preset outlet water temperature t s -5, the circulating pump is started, and the water heater performs preheating combustion. During the preheating, the cold water flow Q1 of the cold water pipeline is detected by the first water flow sensor 4. When the outlet water temperature t c is greater than the first preset outlet water temperature t sAt +5, the water heater stops preheating combustion. Since the water in the household circulation pipes has essentially circulated once at this point, the cold water flow rate Q1 obtained at this time can be defined as the initial circulation water volume Q. z And make the initial preheating water volume Q=Q z In the subsequent preheating and circulating combustion process, heating is only required until the circulating water volume passing through the first water flow sensor 4 reaches the initial preheating water volume Q. All water in the circulating pipes after the initial preheating is heated, such as... Figure 3 The dotted line section.

[0116] After the water heater completes its initial preheating, before the outlet water temperature drops to the circulation start-up condition (i.e., outlet water temperature t), c Drop to the second preset outlet water temperature t s Before -5), if there is a cold water flow in the cold water pipeline (i.e., the first water flow sensor 4 detects a cold water flow Q1 greater than the minimum cold water flow Q), c If the cold water flow rate continues for at least a preset time (e.g., a duration of more than s seconds), it is considered that the user has used cold water. Subsequently, when the cold water flow rate equals 0, it indicates that the user has stopped using cold water. At this time, there will inevitably be a relatively long section of cold water in the circulation pipe, such as... Figure 4 The dotted line represents the area where the water temperature t from the water heater is determined. c Is it greater than the preset inlet water temperature t detected by the first inlet water temperature sensor 3? j1 If the value is +△t, it indicates that the temperature difference between the hot and cold water is large enough to facilitate subsequent logical judgments. In this case, the water heater is immediately restarted for preheating, and the first water flow sensor 4 records the first circulating water volume Q2 at this moment. The first inlet water temperature sensor 3 then detects the change in the water heater's inlet water temperature t within k seconds. j1 When the temperature increase reaches or exceeds the preset change value m, it indicates that the cold water section has completed its circulation and the water has entered the hot water section. At this point, the water heater is controlled to immediately stop the preheating cycle, stop recording the first circulating water volume through the first water flow sensor 4, and calculate the preset preheating water volume Q for the subsequent preheating process. y =Q z -Q2. Compare the preset preheated water volume Q y The magnitude of the initial preheating water volume Q, if the preset preheating water volume Q y If the value is greater than zero and less than the initial preheated water volume Q, then update the initial preheated water volume Q to the preset preheated water volume Q. y That is, let Q=Q y In the subsequent preheating and circulating combustion process, it is only necessary to heat the circulating water until the amount of circulating water passing through the first water flow sensor 4 reaches the preset preheating water volume Q. y Until then. If the preset preheating water volume Q... y Greater than the initial preheated water volume Q or the preset preheated water volume Q yIf the value is less than 0, the original initial preheating water quantity Q is kept unchanged. In the subsequent preheating cycle combustion process, only heating is needed until the cycle water quantity passing through the first water flow sensor 4 reaches the preset preheating water quantity Q. The adaptive logic is mainly used because the specific cold water faucet position of the user is uncertain, and thus the adaptive way is used to slowly obtain the minimum initial preheating water quantity Q. The position of the cold water faucet can also be determined.

[0117] It should be noted that the second water flow sensor 7 and the second water inlet temperature sensor 5 are water flow sensors and water inlet temperature sensors used in the normal hot water heating process.

[0118] In addition, Figure 5 is a total system diagram of a user home cycle pipeline matched with the structure of the water heater of the embodiment. The difference from the general user home cycle pipeline is that the tap water inlet main pipe is directly connected to the water heater water inlet before cold and hot water diversion. The advantage of this structure is that the water heater can monitor the hot water flow used by the user and the cold water flow. The first water flow sensor 4 can detect the cold water flow in both directions.

[0119] In the embodiment, as shown in Figure 3 , Figure 4 , Figure 5 The cycle pipeline includes G1 and G2, and when preheating the cycle pipeline, only part of the water quantity of the cycle pipeline needs to be preheated, and the water quantity of the entire cycle pipeline does not need to be preheated.

[0120] The water heater of the embodiment has the feature of being able to sense the cold water use condition of the user, and can control the preheating cycle to be started immediately after the user uses cold water. Specifically, the initial cycle water quantity and the initial preheating water quantity of the cycle pipeline are obtained, and when it is judged that the cold water flow is equal to zero and the water outlet temperature of the water heater is greater than the preset water inlet temperature, the water heater is controlled to be restarted for preheating. The first cycle water quantity of the cycle pipeline is obtained. The preset preheating water quantity is calculated according to the initial cycle water quantity and the first cycle water quantity. The cycle pipeline is preheated according to the initial preheating water quantity or the preset preheating water quantity, so that when the water heater is preheated, only a certain water quantity needs to be preheated, and the water quantity of the entire cycle pipeline does not need to be preheated, and the energy-saving effect is achieved.

[0121] Embodiment 3

[0122] Figure 7 is a structural schematic diagram of an electronic device provided for the embodiment 3 of the application. For example, the electronic device is a water heater, which includes a memory, a processor, and a computer program stored on the memory and used for running on the processor, and the processor implements the control method of the water heater preheating of the embodiment 1 when executing the program. Figure 7The electronic device 30 shown is merely one example and should not be taken as limiting the scope of functionality or use of embodiments of the application.

[0123] As shown in Figure 7 The electronic device 30 can take the form of a general computing device, such as a server device. Components of the electronic device 30 can include, but are not limited to, the at least one processor 31, the at least one memory 32, and a bus 33 that connects the various system components, including the memory 32 and the processor 31.

[0124] The bus 33 includes a data bus, an address bus, and a control bus.

[0125] The memory 32 can include volatile memory, such as random access memory (RAM) 321 and / or cache memory 322, and can further include non-volatile memory, such as read only memory (ROM) 323.

[0126] The memory 32 can also include a program / utility 325 having a set of program modules 324, including but not limited to an operating system, one or more application programs, other program modules, and program data, each of which can include implementations of a network environment, or some combination thereof.

[0127] The processor 31 can execute instructions, for example, of the program / utility 325 stored in the memory 32 to implement processes of the application such as the method for controlling preheating of a water heater of embodiment 1.

[0128] The electronic device 30 can also communicate with one or more external devices 34 such as a keyboard or a pointing device, through an input / output (I / O) interface 35. Further, the electronic device 30 can communicate with one or more networks, such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet, through a network adapter 36. As Figure 7 illustrated, the network adapter 36 communicates with the other modules of the electronic device 30 through the bus 33. It should be appreciated that although not shown, other hardware and / or software modules could be used in conjunction with the electronic device 30. Such as, but not limited to, microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data archival storage systems, etc.

[0129] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, such division is merely exemplary and not mandatory. Indeed, according to embodiments of the application, the features and functionalities of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functionalities of one unit / module described above can be further divided into units / modules embodied by several units / modules.

[0130] Embodiment 4

[0131] The embodiment provides a computer readable storage medium, and a computer program is stored on the computer readable storage medium. The program is executed by a processor to implement the control method for preheating a water heater provided in the embodiment 1.

[0132] More specifically, the readable storage medium can include, but is not limited to, a portable disc, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0133] In possible embodiments, the application can also be implemented in the form of a program product, which includes program codes for causing a terminal device to execute the control method for preheating a water heater described in the embodiment 1 when the program product is run on the terminal device.

[0134] The program codes for executing the application can be written in any combination of one or more programming languages, and the program codes can be executed completely on the user device, partially on the user device, as a separate software package, partially on the user device and partially on a remote device, or completely on a remote device.

[0135] Although the specific embodiments of the application are described above, those skilled in the art should understand that this is only an illustration, and the protection scope of the application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the application, and these changes and modifications all fall within the protection scope of the application.

Claims

1. A control method for preheating a water heater including a cold water line, characterized by, The control method comprises: determining whether the outlet water temperature of the water heater is greater than a first preset outlet water temperature, and if so, controlling the water heater to stop preheating; obtaining an initial circulating water amount and an initial preheating water amount of a circulating pipeline through the cold water pipeline; determining whether the cold water flow of the cold water pipeline is greater than a minimum cold water flow and lasts for at least a preset time, and if so, determining whether the cold water flow of the cold water pipeline is equal to zero and the outlet water temperature of the water heater is greater than a preset inlet water temperature; if not, determining whether the outlet water temperature of the water heater is less than a second preset outlet water temperature, and if so, controlling the water heater to perform initial preheating; and preheating the circulating pipeline according to the initial preheating water amount; determining whether the cold water flow of the cold water pipeline is equal to zero and the outlet water temperature of the water heater is greater than a preset inlet water temperature, and if so, controlling the water heater to restart preheating; and obtaining a first circulating water amount of the circulating pipeline through the cold water pipeline; calculating a preset preheating water amount according to the initial circulating water amount and the first circulating water amount; preheating the circulating pipeline according to the initial preheating water amount or the preset preheating water amount.

2. The control method of the water heater preheating according to claim 1, wherein, After the step of controlling the water heater to restart preheating, the control method further comprises: determining whether the inlet water temperature change value of the water heater is greater than a preset change value, and if so, controlling the water heater to stop preheating and obtaining a first circulating water amount of the circulating pipeline; and if not, controlling the water heater to restart preheating.

3. The control method of a water heater preheating according to claim 1, wherein, The step of preheating the circulating pipeline according to the initial preheating water amount or the preset preheating water amount comprises: determining whether the preset preheating water amount is greater than zero and less than the initial preheating water amount, and if so, updating the initial preheating water amount to the preset preheating water amount and preheating the circulating pipeline according to the preset preheating water amount; and if not, keeping the initial preheating water amount unchanged and preheating the circulating pipeline according to the initial preheating water amount.

4. A control system for preheating a water heater, the water heater including a cold water pipeline, characterized in that, The control system comprises: a first determination module configured to determine whether the outlet water temperature of the water heater is greater than a first preset outlet water temperature, and if so, call a first control module; the first control module configured to control the water heater to stop preheating; a first obtaining module configured to obtain an initial circulating water amount and an initial preheating water amount of a circulating pipeline through the cold water pipeline; a second determination module configured to determine whether the cold water flow of the cold water pipeline is equal to zero and the outlet water temperature of the water heater is greater than a preset inlet water temperature, and if so, call a second control module; the second control module configured to control the water heater to restart preheating; a second obtaining module configured to obtain a first circulating water amount of the circulating pipeline through the cold water pipeline; a calculation module configured to calculate a preset preheating water amount according to the initial circulating water amount and the first circulating water amount; a first preheating module configured to preheat the circulating pipeline according to the initial preheating water amount or the preset preheating water amount; the control system further comprises: The fourth judging module is configured to judge whether the cold water flow of the cold water pipeline is greater than the minimum cold water flow and lasts for at least a preset time, and if yes, the second control module is called; if no, a fifth judging module is called. The fifth judging module is configured to judge whether the outlet water temperature of the water heater is less than a second preset outlet water temperature, and if yes, a third control module is called. The third control module is configured to control the water heater to perform initial preheating. The second preheating module is configured to preheat the circulation pipeline according to the initial preheating water amount.

5. A preheating control system for a water heater as defined in claim 4, wherein The control system further comprises: The third judging module is configured to judge whether the inlet water temperature variation value of the water heater is greater than a preset variation value, and if yes, the second obtaining module is called; if no, the second control module is called. The second obtaining module is configured to control the water heater to stop preheating, and obtain a first circulation water amount of the circulation pipeline.

6. The control system for preheating a water heater as set forth in claim 4, wherein, The first preheating module comprises: The judging unit is configured to judge whether the preset preheating water amount is greater than zero and less than the initial preheating water amount, and if yes, a first preheating unit is called; if no, a second preheating unit is called. The first preheating unit is configured to update the initial preheating water amount to the preset preheating water amount, and preheat the circulation pipeline according to the preset preheating water amount. The second preheating unit is configured to keep the initial preheating water amount unchanged, and preheat the circulation pipeline according to the initial preheating water amount.

7. A water heater comprising a memory, a processor, and a computer program stored on the memory for running on the processor, characterized in that, The processor executes the computer program to realize the control method of the water heater preheating according to any one of claims 1-3.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the control method of the water heater preheating according to any one of claims 1-3.

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