A method and device for regulating water pressure and a gas water heater

Abstract

The present application relates to the field of smart home appliance technology, and in particular to a method, device and gas water heater for regulating water pressure. The method comprises: obtaining the water pump boost flow corresponding to the maximum water pump power of the water pump, as well as the actual maximum water flow, the actual minimum water flow and the cycle duration in the water flow fluctuation cycle, and determining the starting water pump power. According to the starting water pump power, the maximum water pump power and the cycle duration, the water pump power adjustment step is determined; in the process of the water flow decreasing from the actual maximum water flow to the actual minimum water flow, based on the water pump power adjustment step, the water pump is controlled to increase from the starting water pump power to the maximum water pump power, and in the process of the water flow increasing from the actual minimum water flow to the actual maximum water flow, based on the water pump power adjustment step, the water pump is controlled to decrease from the maximum water pump power to the starting water pump power. The use of the present application can stabilize the water flow.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, and in particular to a method and device for regulating water pressure and a gas water heater. Background Art

[0002] At present, in the process of daily water use, users often encounter the problem of fluctuating water temperature due to sudden changes in water flow or unstable water pressure. Especially during bathing, the fluctuating water temperature will cause users to have a bad bathing experience. Therefore, a control method for intelligently regulating the water pressure of a gas water heater is urgently needed to solve the above problems. Summary of the invention

[0003] Based on this, it is necessary to provide a water pressure regulating method, device and gas water heater to address the above technical problems.

[0004] In a first aspect, a method for regulating water pressure is provided, the method comprising:

[0005] Obtain the water pump boost flow corresponding to the maximum water pump power of the water pump, as well as the actual maximum water flow, actual minimum water flow and cycle duration in the water flow fluctuation cycle;

[0006] Determining a starting water pump power according to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power;

[0007] Determining a water pump power adjustment step length according to the starting water pump power, the maximum water pump power and the cycle duration;

[0008] In the process of the water flow rate decreasing from the actual maximum water flow rate to the actual minimum water flow rate, based on the water pump power adjustment step, the water pump is controlled to increase the water pump power from the starting water pump power to the maximum water pump power; and in the process of the water flow rate increasing from the actual minimum water flow rate to the actual maximum water flow rate, based on the water pump power adjustment step, the water pump is controlled to decrease the water pump power from the maximum water pump power to the starting water pump power.

[0009] As an optional implementation manner, the step of obtaining the water pump boost flow rate corresponding to the maximum water pump power of the water pump includes:

[0010] Collecting a first water flow sequence according to a preset sampling window, sliding step and sampling period;

[0011] If the difference between the maximum water flow rate and the minimum water flow rate in the first water flow rate sequence is greater than a preset water flow rate threshold, the water pump power of the water pump is controlled to perform water flow pressurization according to the maximum water pump power, and a second water flow rate sequence is collected;

[0012] Determine a first average value of the maximum water flow and the minimum water flow in the first water flow sequence and a second average value of the maximum water flow and the minimum water flow in the second water flow sequence, and determine the difference between the second average value and the first average value as the water pump boost flow corresponding to the maximum water pump power of the water pump.

[0013] As an optional implementation manner, determining the water pump power adjustment step length according to the starting water pump power, the maximum water pump power and the cycle duration includes:

[0014] The difference between the maximum water pump power and the starting water pump power is determined, and the ratio of the difference to half of the cycle duration and a preset water pump power adjustment step frequency is determined as the water pump power adjustment step length.

[0015] As an optional implementation manner, determining the starting water pump power according to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power includes:

[0016] The sum of the actual minimum water flow and the water pump boost flow is determined as the boost minimum water flow;

[0017] If the actual maximum water flow rate is greater than the boost minimum water flow rate, the initial water pump power is 0;

[0018] If the actual maximum water flow rate is less than or equal to the boost minimum water flow rate, the difference between the boost minimum water flow rate and the actual maximum water flow rate is calculated, and the product of the ratio of the difference to the water pump boost flow rate and the maximum water pump power is determined as the starting water pump power.

[0019] As an optional implementation, the method further includes:

[0020] When it is detected that the user is turning on the water, the demand load is determined based on the collected current water flow, water inlet temperature, preset target temperature and preset heating coefficient;

[0021] In the pre-stored correspondence between load and heating gear, the candidate heating gear corresponding to the required load is queried, and the maximum heating gear among the candidate heating gears is determined as the target heating gear.

[0022] As an optional implementation, when it is detected that the user turns on the water, the demand load is determined according to the collected current water flow, water inlet temperature, preset target temperature and preset heating coefficient, including:

[0023] The ratio of the difference between the preset target temperature and the inlet water temperature to the preset heating coefficient is determined, and the product of the current water flow and the ratio is determined as the demand load.

[0024] In a second aspect, a water pressure regulating device is provided, the device comprising:

[0025] An acquisition module is used to obtain the water pump boost flow corresponding to the maximum water pump power of the water pump, as well as the actual maximum water flow, the actual minimum water flow and the cycle duration in the water flow fluctuation cycle;

[0026] A first determination module, configured to determine a starting water pump power according to the actual maximum water flow rate, the actual minimum water flow rate, the water pump boost flow rate and the maximum water pump power;

[0027] A second determination module is used to determine a water pump power adjustment step length according to the starting water pump power, the maximum water pump power and the cycle duration;

[0028] A control module is used to control the water pump to increase the water pump power from the starting water pump power to the maximum water pump power based on the water pump power adjustment step when the water flow rate decreases from the actual maximum water flow rate to the actual minimum water flow rate, and to control the water pump to decrease the water pump power from the maximum water pump power to the starting water pump power based on the water pump power adjustment step when the water flow rate increases from the actual minimum water flow rate to the actual maximum water flow rate.

[0029] As an optional implementation manner, the acquisition module is further used to:

[0030] Collecting a first water flow sequence according to a preset sampling window, sliding step and sampling period;

[0031] If the difference between the maximum water flow rate and the minimum water flow rate in the first water flow rate sequence is greater than a preset water flow rate threshold, the water pump power of the water pump is controlled to perform water flow pressurization according to the maximum water pump power, and a second water flow rate sequence is collected;

[0032] Determine a first average value of the maximum water flow and the minimum water flow in the first water flow sequence and a second average value of the maximum water flow and the minimum water flow in the second water flow sequence, and determine the difference between the second average value and the first average value as the water pump boost flow corresponding to the maximum water pump power of the water pump.

[0033] As an optional implementation manner, the second determining module is further used to:

[0034] The difference between the maximum water pump power and the starting water pump power is determined, and the ratio of the difference to half of the cycle duration and a preset water pump power adjustment step frequency is determined as the water pump power adjustment step length.

[0035] As an optional implementation manner, the first determining module is further used to:

[0036] The sum of the actual minimum water flow and the water pump boost flow is determined as the boost minimum water flow;

[0037] If the actual maximum water flow rate is greater than the boost minimum water flow rate, the initial water pump power is 0;

[0038] If the actual maximum water flow rate is less than or equal to the boost minimum water flow rate, the difference between the boost minimum water flow rate and the actual maximum water flow rate is calculated, and the product of the ratio of the difference to the water pump boost flow rate and the maximum water pump power is determined as the starting water pump power.

[0039] As an optional implementation manner, the device further includes:

[0040] The third determination module is used to determine the demand load according to the collected current water flow, water inlet temperature, preset target temperature and preset heating coefficient after detecting that the user turns on the water;

[0041] The fourth determination module is used to query the alternative heating gear corresponding to the required load in the pre-stored correspondence between the load and the heating gear, and determine the maximum heating gear among the alternative heating gears as the target heating gear.

[0042] As an optional implementation manner, the third determining module is further used to:

[0043] The ratio of the difference between the preset target temperature and the inlet water temperature to the preset heating coefficient is determined, and the product of the current water flow and the ratio is determined as the demand load.

[0044] In a third aspect, a gas water heater is provided, comprising: a water pressure regulating method as described in any one of the first aspect and a water pressure regulating device as described in any one of the second aspect.

[0045] The present application provides a method, device and gas water heater for regulating water pressure. The technical solution provided by the embodiment of the present application at least brings the following beneficial effects: obtaining the water pump boost flow corresponding to the maximum water pump power of the water pump and the actual maximum water flow, actual minimum water flow and cycle duration in the water flow fluctuation cycle; determining the starting water pump power according to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power; determining the water pump power adjustment step according to the starting water pump power, the maximum water pump power and the cycle duration; in the process of the water flow decreasing from the actual maximum water flow to the actual minimum water flow, based on the water pump power adjustment step, controlling the water pump to increase from the starting water pump power to the maximum water pump power, and in the process of the water flow increasing from the actual minimum water flow to the actual maximum water flow, based on the water pump power adjustment step, controlling the water pump to decrease from the maximum water pump power to the starting water pump power. The present application stabilizes the water flow by adjusting the water pump power according to the fluctuation of the water flow.

[0046] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A flow chart of a method for regulating water pressure provided in an embodiment of the present application;

[0049] Figure 2 A flow chart of a method for regulating water pressure provided in an embodiment of the present application;

[0050] Figure 3 A flow chart of a method for regulating water pressure provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of water flow fluctuations provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of water flow fluctuations provided in an embodiment of the present application;

[0053] Figure 6 A schematic diagram of a water pump power regulation provided in an embodiment of the present application;

[0054] Figure 7 Flow chart of a method for regulating water pressure provided in an embodiment of the present application

[0055] Figure 8 A schematic diagram of the structure of a water pressure regulating device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0057] The following will describe in detail a method for adjusting water pressure provided by an embodiment of the present application in combination with a specific implementation method. Figure 1 A flow chart of a method for regulating water pressure provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the specific steps are as follows:

[0058] Step 101, obtaining the water pump boost flow corresponding to the maximum water pump power of the water pump and the actual maximum water flow, the actual minimum water flow and the cycle duration in the water flow fluctuation cycle.

[0059] In implementation, the controller obtains the water pump boost flow corresponding to the maximum water pump power of the water pump, as well as the actual maximum water flow, actual minimum water flow and cycle duration in the water flow fluctuation cycle. Among them, the water flow fluctuation cycle is the process in which the water flow continuously decreases from the maximum water flow to the minimum water flow, and then increases to the maximum water flow. The duration of this process is the cycle duration corresponding to the water flow fluctuation cycle. The actual maximum water flow and the actual minimum water flow are respectively the maximum water flow and the minimum water flow in a water flow fluctuation cycle when the water pump power is 0.

[0060] Optional, Figure 2 A flow chart of a method for regulating water pressure provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the specific steps for the controller to obtain the water pump boost flow corresponding to the maximum water pump power of the water pump are as follows:

[0061] Step 201: Collect a first water flow sequence according to a preset sampling window, sliding step and sampling period.

[0062] In implementation, the controller collects a first preset number of water flow pulses and their corresponding frequencies according to a preset sampling period, and determines the water flow signal corresponding to each water flow pulse according to the preset number of water flow pulses and their corresponding frequencies. The controller uses the average value of the water flow signals corresponding to the preset number of water flow pulses as the water flow corresponding to the current sampling period. The controller collects the first water flow sequence according to the preset sampling window, sliding step and sampling period. For example: the preset sampling period is 0.25 seconds, and 4 water flow pulses are collected in one water flow pulse sampling period. The frequencies corresponding to the 4 water flow pulses are 16Hz, 20Hz, 32Hz and 20Hz, which are converted into water flow of 2L / min, 2.5L / min, 4L / min and 2.5L / min respectively. The average value of the water flow corresponding to the 4 water flow pulses is 2.75L / min, and the water flow corresponding to the current water flow pulse sampling period is 2.75L / min. The controller collects a second preset number of water flows according to the above method and the sampling period of the water flow. For example, the preset sampling period is 0.25 seconds, the sampling window is 100, and the sliding length is 1. The controller may include a first water flow sequence a[0], a[1], ..., a

[99] of 100 water flows, where a[0] is the latest sampled water flow and a

[99] is the oldest water flow.

[0063] Step 202: If the difference between the maximum water flow and the minimum water flow in the first water flow sequence is greater than a preset water flow threshold, the water pump power is controlled to boost the water flow according to the maximum water pump power, and a second water flow sequence is collected.

[0064] In implementation, if the difference between the maximum water flow and the minimum water flow in the first water flow sequence is greater than a preset water flow threshold, it indicates that the water flow fluctuates. The controller controls the water pump power to pressurize the water flow according to the maximum water pump power, and collects the second water flow sequence according to the method of step 201. For example: in the first water flow sequence a[0], a[1],…, a

[99] , the controller determines that the maximum water flow and the minimum water flow are L1max and L1min respectively. If the water flow is stable, L1max and L1min are almost equal. When the difference between L1max and L1min is greater than the preset water flow threshold, it indicates that the water flow fluctuates. The controller controls the water pump power to pressurize the water flow according to the maximum water pump power, and collects the second water flow sequence.

[0065] Step 203, determine the first average value of the maximum water flow and the minimum water flow in the first water flow sequence and the second average value of the maximum water flow and the minimum water flow in the second water flow sequence, and determine the difference between the second average value and the first average value as the water pump boost flow corresponding to the maximum water pump power of the water pump.

[0066] In practice, based on the periodicity of water flow fluctuations, the controller can determine the first average value of the maximum water flow L1max and the minimum water flow L1min in the first water flow sequence and the second average value of the maximum water flow L2max and the minimum water flow L2min in the second water flow sequence. The difference between the first average value and the second average value can represent the change in water flow before and after water flow pressure is increased. Therefore, the controller determines the difference between the second average value and the first average value as the water pump pressure increase flow L corresponding to the maximum water pump power of the water pump. pre ,Right now:

[0067] L pre =(L2max+L2min) / 2-(L1max+L1min) / 2.

[0068] Step 102, determining the initial water pump power according to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power.

[0069] In implementation, the controller determines the starting water pump power according to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power.

[0070] Optional, Figure 3 A flow chart of a method for regulating water pressure provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the specific steps for the controller to determine the starting water pump power according to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power are as follows:

[0071] Step 301: The sum of the actual minimum water flow and the water pump boost flow is determined as the boost minimum water flow.

[0072] In implementation, the controller calculates the sum of the actual minimum water flow and the water pump boost flow according to the actual minimum water flow and the water pump boost flow corresponding to the maximum water pump power determined in step 203 to obtain the boost minimum water flow. Figure 4 A schematic diagram of water flow fluctuations provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, broken line 1 is the water flow fluctuation process before the water flow is pressurized according to the maximum water pump power, and broken line 2 is the water flow fluctuation process after the water flow is pressurized. The horizontal axis is time, and the vertical axis is water flow. The actual minimum water flow in broken line 1 is L3min, and the minimum water flow in the pressurization in broken line 2 is L4min. The difference between the two is the water pump pressurization flow L pre .

[0073] Step 302: If the actual maximum water flow is greater than the minimum boost water flow, the initial water pump power is 0.

[0074] In implementation, Figure 4As shown in FIG. 1 , if the actual maximum water flow rate L3max ​​is greater than the minimum water flow rate L4min after supercharging, it means that the water flow rate after supercharging has changed little. The initial water pump power can be set to 0. That is, the actual maximum water flow rate L3max ​​corresponds to the initial water pump power (0).

[0075] Step 303: If the actual maximum water flow rate is less than or equal to the minimum boost water flow rate, the difference between the minimum boost water flow rate and the actual maximum water flow rate is calculated, and the product of the ratio of the difference to the water pump boost flow rate and the maximum water pump power is determined as the starting water pump power.

[0076] In implementation, Figure 5 A schematic diagram of water flow fluctuations provided in an embodiment of the present application is shown in FIG. Figure 5 As shown in the figure, if the actual maximum water flow rate L3max ​​is less than or equal to the minimum water flow rate L4min, it means that the water flow rate changes greatly after the boost. The controller calculates the difference between the minimum water flow rate L4min and the actual maximum water flow rate L3max, and adds the difference to the water pump boost flow rate L pre The ratio of the maximum pump power Q max The product of is determined as the starting pump power Q0. That is, Q0 = Q max (L4min-L3max) / L pre .

[0077] Step 103, determining the water pump power adjustment step length according to the initial water pump power, the maximum water pump power and the cycle duration.

[0078] In implementation, the controller determines the water pump power adjustment step size according to the starting water pump power, the maximum water pump power and the cycle duration.

[0079] Optionally, the controller determines the specific steps of adjusting the water pump power according to the starting water pump power, the maximum water pump power and the cycle duration as follows:

[0080] The difference between the maximum water pump power and the initial water pump power is determined, and the ratio of the difference to half of the cycle length and the preset water pump power adjustment step frequency is determined as the water pump power adjustment step length.

[0081] In implementation, Figure 6 A schematic diagram of a water pump power regulation provided in an embodiment of the present application, such as Figure 6 As shown, within a water flow fluctuation period T, the controller calculates the maximum pump power Q max The difference between the initial water pump power Q0 and the difference is determined as the water pump power adjustment step length, that is, the slope of the water pump power adjustment in the figure, by the ratio of half the cycle time T and the preset water pump power adjustment step frequency.

[0082] Step 104, in the process of the water flow rate decreasing from the actual maximum water flow rate to the actual minimum water flow rate, based on the water pump power adjustment step, the water pump is controlled to increase from the starting water pump power to the maximum water pump power; and in the process of the water flow rate increasing from the actual minimum water flow rate to the actual maximum water flow rate, based on the water pump power adjustment step, the water pump is controlled to decrease from the maximum water pump power to the starting water pump power.

[0083] In implementation, Figure 6 As shown, in a water flow fluctuation cycle, during the process of the actual maximum water flow rate decreasing to the minimum water flow rate, the controller controls the water pump to increase the water pump power from the starting water pump power to the maximum water pump power according to the water pump power adjustment step (i.e., slope). During the process of the actual minimum water flow rate increasing to the actual maximum water flow rate, the controller controls the water pump to decrease the water pump power from the starting water pump power to the maximum water pump power according to the water pump power adjustment step (i.e., slope). Figure 4 As shown in the figure, within the water flow fluctuation period T, when the controller controls the water pump to adjust the water pump power according to the step length, the change process of the water flow is the broken line 3. It can be seen that the maximum water flow is L3max, the minimum water flow is L4min, and the water flow fluctuation becomes smaller. Figure 5 As shown, within the water flow fluctuation period T, when the controller controls the water pump to adjust the water pump power according to the step length, the change process of the water flow is broken line 3. It can be seen that the water flow is adjusted to L4min and the water flow is stable.

[0084] As an optional implementation, Figure 7 A flow chart of a method for regulating water pressure provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, the specific steps for the controller to determine the target heating gear are as follows:

[0085] Step 701, when it is detected that the user turns on the water, the demand load is determined according to the collected current water flow, water inlet temperature, preset target temperature and preset heating coefficient.

[0086] In implementation, the controller collects water flow. When the water flow is greater than the preset water-boiling threshold, it means that the user has executed the water-boiling action and the water flow is in a state of continuous increase. At this time, the controller collects the current water flow and water inlet temperature, and determines the required load based on the current water flow, water inlet temperature, preset target temperature and preset heating coefficient. The preset heating coefficient indicates the maximum temperature that the water can rise to when heating a unit volume of water per unit time according to a unit load. For example, when the heating coefficient is 14, it means that when the load is 1kW and 1L / min of water is heated, the water can be heated to a maximum of 14 degrees.

[0087] Optionally, when it is detected that the user turns on the water, the specific steps of determining the demand load are to determine the ratio of the difference between the preset target temperature and the inlet water temperature to the preset heating coefficient based on the collected current water flow, water inlet temperature, preset target temperature and preset heating coefficient, and determine the demand load as the product of the current water flow and the ratio.

[0088] In implementation, the controller can determine the temperature that needs to be raised when the water reaches the preset target temperature based on the difference between the preset target temperature and the inlet water temperature. Based on the ratio of the difference to the preset heating coefficient, the controller can determine the load required to heat the unit volume of water per unit time to the preset target temperature. Based on the product of the current water flow rate and the ratio, the controller can determine the required load to heat the water at the current water flow rate to the preset target temperature. The formula corresponding to the above method is P = L*(T 目标 -T 进水 ) / k), where P is the demand load, L is the current water flow, T 目标 is the preset target temperature, T 进水 is the water inlet temperature, and k is the preset heating coefficient.

[0089] Step 702: In the pre-stored correspondence between load and heating level, query the candidate heating levels corresponding to the required load, and determine the maximum heating level among the candidate heating levels as the target heating level.

[0090] In implementation, the controller can query the alternative heating gear corresponding to the required load in the pre-stored correspondence between the load and the heating gear, and determine the maximum heating gear among the alternative heating gears as the target heating gear. Table 1 is the correspondence between the load and the heating gear, as shown in Table 1:

[0091] Table 1

[0092] Load range(KW) Heating gear(row) 3-7 2 6-13 4 10-23 6

[0093] For example: The controller determines that the demand load is 12KW according to step 701. According to the corresponding relationship between the load and the heating gear shown in Table 1, it can be determined that the alternative heating gears are 4 rows and 6 rows. Since the user has just turned on the water, the water flow continues to increase, and the demand load will also continue to increase. When the demand load increases to the load range corresponding to a higher heating gear, the controller switches the heating gear to a higher heating gear. Due to the switching of the heating gear, the heating firepower increases, and then the water temperature suddenly increases. If the user is using water at this time, the water temperature may suddenly rise, making the user's water experience worse. Therefore, the controller determines the maximum heating gear among the alternative heating gears as the target heating gear to prevent the heating gear from changing suddenly due to the increase in the demand load.

[0094] The embodiment of the present application provides a method for regulating water pressure, the method comprising: obtaining the water pump boost flow corresponding to the maximum water pump power of the water pump and the actual maximum water flow, the actual minimum water flow and the cycle duration in the water flow fluctuation cycle. According to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power, the starting water pump power is determined. According to the starting water pump power, the maximum water pump power and the cycle duration, the water pump power adjustment step is determined; in the process of the water flow rate decreasing from the actual maximum water flow rate to the actual minimum water flow rate, based on the water pump power adjustment step, the water pump is controlled to increase from the starting water pump power to the maximum water pump power, and in the process of the water flow rate increasing from the actual minimum water flow rate to the actual maximum water flow rate, based on the water pump power adjustment step, the water pump is controlled to decrease from the maximum water pump power to the starting water pump power. According to the flow fluctuation situation, the present application stabilizes the water flow by adjusting the water pump power.

[0095] It should be understood that although Figures 1 to 3 and Figure 7 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figures 1 to 3 and Figure 7 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0096] It can be understood that the same / similar parts between the various embodiments of the above method in this specification can refer to each other, and each embodiment focuses on the differences from other embodiments. For related points, please refer to the description of other method embodiments.

[0097] The present application also provides a water pressure regulating device, such as Figure 8 As shown, the device comprises:

[0098] An acquisition module 810 is used to acquire the water pump boost flow corresponding to the maximum water pump power of the water pump, as well as the actual maximum water flow, the actual minimum water flow and the cycle duration in the water flow fluctuation cycle;

[0099] A first determination module 820, configured to determine a starting water pump power according to an actual maximum water flow rate, an actual minimum water flow rate, a water pump boost flow rate, and a maximum water pump power;

[0100] A second determination module 830 is used to determine a water pump power adjustment step length according to the starting water pump power, the maximum water pump power and the cycle duration;

[0101] Control module 840 is used to control the water pump to increase the power from the starting water pump power to the maximum water pump power based on the water pump power adjustment step when the water flow rate decreases from the actual maximum water flow rate to the actual minimum water flow rate, and to control the water pump to decrease the power from the maximum water pump power to the starting water pump power based on the water pump power adjustment step when the water flow rate increases from the actual minimum water flow rate to the actual maximum water flow rate.

[0102] As an optional implementation, the acquisition module 810 is further used for:

[0103] Collecting a first water flow sequence according to a preset sampling window, sliding step and sampling period;

[0104] If the difference between the maximum water flow rate and the minimum water flow rate in the first water flow rate sequence is greater than a preset water flow rate threshold, the water pump power is controlled to perform water flow pressurization according to the maximum water pump power, and a second water flow rate sequence is collected;

[0105] Determine a first average value of the maximum water flow and the minimum water flow in the first water flow sequence and a second average value of the maximum water flow and the minimum water flow in the second water flow sequence, and determine the difference between the second average value and the first average value as the water pump boost flow corresponding to the maximum water pump power of the water pump.

[0106] As an optional implementation manner, the second determining module 830 is further configured to:

[0107] The difference between the maximum water pump power and the initial water pump power is determined, and the ratio of the difference to the cycle length and the preset water pump power adjustment step frequency is determined as the water pump power adjustment step length.

[0108] As an optional implementation manner, the first determining module 820 is further configured to:

[0109] The sum of the actual minimum water flow and the water pump boost flow is determined as the boost minimum water flow;

[0110] If the actual maximum water flow is greater than the minimum water flow for boosting, the initial water pump power is 0;

[0111] If the actual maximum water flow rate is less than or equal to the minimum boost water flow rate, the difference between the minimum boost water flow rate and the actual maximum water flow rate is calculated, and the product of the ratio of the difference to the water pump boost flow rate and the maximum water pump power is determined as the starting water pump power.

[0112] As an optional implementation, the device further includes:

[0113] The third determination module 850 is used to determine the demand load according to the collected current water flow, water inlet temperature, preset target temperature and preset heating coefficient after detecting that the user turns on the water;

[0114] The fourth determination module 860 is used to query the alternative heating gear corresponding to the required load in the pre-stored correspondence between the load and the heating gear, and determine the maximum heating gear among the alternative heating gears as the target heating gear.

[0115] As an optional implementation manner, the third determining module 850 is further configured to:

[0116] The ratio of the difference between the preset target temperature and the inlet water temperature to the preset heating coefficient is determined, and the product of the current water flow and the ratio is determined as the demand load.

[0117] The embodiment of the present application provides a water pressure regulating device, which includes an acquisition module 810, which is used to obtain the water pump boost flow corresponding to the maximum water pump power of the water pump and the actual maximum water flow, the actual minimum water flow and the cycle duration in the water flow fluctuation cycle. The first determination module 820 is used to determine the starting water pump power according to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power. The second determination module 830 is used to determine the water pump power adjustment step according to the starting water pump power, the maximum water pump power and the cycle duration. The control module 840 is used to control the water pump from the starting water pump power to the maximum water pump power based on the water pump power adjustment step in the process of the water flow decreasing from the actual maximum water flow to the actual minimum water flow, and control the water pump from the maximum water pump power to the starting water pump power based on the water pump power adjustment step in the process of the water flow increasing from the actual minimum water flow to the actual maximum water flow. The present application stabilizes the water flow by adjusting the water pump power according to the water flow fluctuation.

[0118] The specific definition of the water pressure regulating device can be found in the definition of the water pressure regulating method above, which will not be repeated here. Each module in the above water pressure regulating device can be implemented in whole or in part by software, hardware and a combination thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0119] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0120] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0121] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0122] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0123] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0124] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for regulating water pressure, characterized in that: The method comprises: Obtain the water pump boost flow corresponding to the maximum water pump power of the water pump, as well as the actual maximum water flow, actual minimum water flow and cycle duration in the water flow fluctuation cycle; Determining a starting water pump power according to the actual maximum water flow, the actual minimum water flow, the water pump boost flow and the maximum water pump power; Determining a water pump power adjustment step length according to the starting water pump power, the maximum water pump power and the cycle duration; In the process of the water flow rate decreasing from the actual maximum water flow rate to the actual minimum water flow rate, based on the water pump power adjustment step, the water pump is controlled to increase the water pump power from the starting water pump power to the maximum water pump power; and in the process of the water flow rate increasing from the actual minimum water flow rate to the actual maximum water flow rate, based on the water pump power adjustment step, the water pump is controlled to decrease the water pump power from the maximum water pump power to the starting water pump power.

2. The method according to claim 1, characterized in that The step of obtaining the water pump boost flow rate corresponding to the maximum water pump power of the water pump includes: Collecting a first water flow sequence according to a preset sampling window, sliding step and sampling period; If the difference between the maximum water flow rate and the minimum water flow rate in the first water flow rate sequence is greater than a preset water flow rate threshold, the water pump power of the water pump is controlled to perform water flow pressurization according to the maximum water pump power, and a second water flow rate sequence is collected; Determine a first average value of the maximum water flow and the minimum water flow in the first water flow sequence and a second average value of the maximum water flow and the minimum water flow in the second water flow sequence, and determine the difference between the second average value and the first average value as the water pump boost flow corresponding to the maximum water pump power of the water pump.

3. The method according to claim 1, characterized in that The step of determining the water pump power adjustment step according to the starting water pump power, the maximum water pump power and the cycle duration includes: The difference between the maximum water pump power and the starting water pump power is determined, and the ratio of the difference to half of the cycle duration and a preset water pump power adjustment step frequency is determined as the water pump power adjustment step length.

4. The method according to claim 1, characterized in that: The step of determining the starting water pump power according to the actual maximum water flow rate, the actual minimum water flow rate, the water pump boost flow rate and the maximum water pump power comprises: The sum of the actual minimum water flow and the water pump boost flow is determined as the boost minimum water flow; If the actual maximum water flow rate is greater than the boost minimum water flow rate, the initial water pump power is 0; If the actual maximum water flow rate is less than or equal to the boost minimum water flow rate, the difference between the boost minimum water flow rate and the actual maximum water flow rate is calculated, and the product of the ratio of the difference to the water pump boost flow rate and the maximum water pump power is determined as the starting water pump power.

5. The method according to claim 1, characterized in that The method further comprises: When it is detected that the user is turning on the water, the demand load is determined based on the collected current water flow, water inlet temperature, preset target temperature and preset heating coefficient; In the pre-stored correspondence between load and heating gear, the candidate heating gear corresponding to the required load is queried, and the maximum heating gear among the candidate heating gears is determined as the target heating gear.

6. The method according to claim 5, characterized in that When it is detected that the user turns on the water, the demand load is determined according to the collected current water flow, water inlet temperature, preset target temperature and preset heating coefficient, including: The ratio of the difference between the preset target temperature and the inlet water temperature to the preset heating coefficient is determined, and the product of the current water flow and the ratio is determined as the demand load.

7. A water pressure regulating device, characterized in that: The device comprises: An acquisition module is used to obtain the water pump boost flow corresponding to the maximum water pump power of the water pump, as well as the actual maximum water flow, the actual minimum water flow and the cycle duration in the water flow fluctuation cycle; A first determining module, configured to determine a starting water pump power according to the actual maximum water flow rate, the actual minimum water flow rate, the water pump boost flow rate and the maximum water pump power; A second determination module is used to determine a water pump power adjustment step length according to the starting water pump power, the maximum water pump power and the cycle duration; A control module is used to control the water pump to increase the water pump power from the starting water pump power to the maximum water pump power based on the water pump power adjustment step when the water flow rate decreases from the actual maximum water flow rate to the actual minimum water flow rate, and to control the water pump to decrease the water pump power from the maximum water pump power to the starting water pump power based on the water pump power adjustment step when the water flow rate increases from the actual minimum water flow rate to the actual maximum water flow rate.

8. The device according to claim 7, characterized in that The acquisition module is further used for: Collecting a first water flow sequence according to a preset sampling window, sliding step and sampling period; If the difference between the maximum water flow rate and the minimum water flow rate in the first water flow rate sequence is greater than a preset water flow rate threshold, the water pump power of the water pump is controlled to perform water flow pressurization according to the maximum water pump power, and a second water flow rate sequence is collected; Determine a first average value of the maximum water flow and the minimum water flow in the first water flow sequence and a second average value of the maximum water flow and the minimum water flow in the second water flow sequence, and determine the difference between the second average value and the first average value as the water pump boost flow corresponding to the maximum water pump power of the water pump.

9. The device according to claim 7, characterized in that The second determining module is further used for: The difference between the maximum water pump power and the starting water pump power is determined, and the ratio of the difference to half of the cycle duration and a preset water pump power adjustment step frequency is determined as the water pump power adjustment step length.

10. A gas water heater, characterized in that: The gas water heater comprises: a water pressure regulating method as described in any one of claims 1 to 6 and a water pressure regulating device as described in any one of claims 7 to 9.

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