Gas water heater constant temperature adjusting method and device, gas water heater and storage medium

Abstract

The application relates to a constant-temperature adjusting method and device of a gas water heater, the gas water heater and a storage medium. The method comprises the following steps: acquiring the water flow size of a water proportional valve at different openings; calculating the water flow difference value according to the water flow size at adjacent openings; screening the maximum flow difference value from the water flow difference value; calculating the theoretical fluctuation outlet water temperature according to the maximum flow difference value, the outlet water set temperature, the inlet water temperature and the total energy value; obtaining the stable outlet water temperature range according to the theoretical fluctuation outlet water temperature and the outlet water set temperature; and ending the constant-temperature adjustment of the gas water heater if the actual outlet water temperature belongs to the stable outlet water temperature range. The constant-temperature adjustment of the gas water heater can be quickly completed by judging whether the actual outlet water temperature belongs to the stable outlet water temperature range, and the gas water heater can be prevented from being in the oscillation adjustment during the constant-temperature adjustment.

Description

Technical Field

[0001] This application relates to the field of gas water heater technology, and in particular to a gas water heater constant temperature regulation method, device, gas water heater and storage medium. Background Technology

[0002] To meet users' demands for constant temperature in gas water heaters, manufacturers typically add a water proportioning valve at the inlet and achieve this effect through dual water and gas regulation. The water proportioning valve is primarily driven by a stepper motor, which rotates the valve's spindle. Since the spindle and valve housing have a clearance fit, adjusting this clearance during spindle rotation controls the valve's opening, thereby regulating the water flow and achieving a constant temperature output.

[0003] In traditional thermostatic control, the opening of the water proportional valve is directly adjusted according to the set temperature to ensure the outlet water temperature equals the set temperature. However, when adjusting the water proportional valve using a stepper motor, the stepper motor rotates in fixed step increments, resulting in a minimum fixed opening of the water proportional valve. This leads to a minimum adjustable outlet water temperature. Consequently, during thermostatic control, the outlet water temperature may oscillate repeatedly around the set temperature, affecting the efficiency of the thermostatic control. Summary of the Invention

[0004] Based on this, the technical problem to be solved by the present invention is to provide a method, device, gas water heater and storage medium for constant temperature regulation of gas water heater that can improve the efficiency of constant temperature regulation.

[0005] Firstly, this application provides a method for constant temperature regulation of a gas water heater. The method includes:

[0006] To obtain the water flow rate of the water proportional valve at different opening degrees;

[0007] Calculate the difference in water flow rate based on the water flow rate at adjacent opening degrees;

[0008] The maximum flow rate difference is selected from the water flow rate differences.

[0009] The theoretical fluctuating outlet temperature is calculated based on the maximum flow rate difference, the set outlet temperature, the inlet temperature, and the total energy value.

[0010] A stable outlet water temperature range is obtained based on the theoretical fluctuation outlet water temperature and the set outlet water temperature.

[0011] If the actual outlet water temperature falls within the stable outlet water temperature range, the thermostatic adjustment of the gas water heater will be terminated.

[0012] In one embodiment, the step of obtaining the water flow rate of the water proportional valve at different opening degrees includes:

[0013] The opening degree of the water proportional valve is controlled to be adjusted sequentially from the maximum opening degree to the minimum opening degree;

[0014] The water flow rate of the water proportional valve is detected at different opening degrees.

[0015] In one embodiment, the step of calculating the theoretical fluctuating outlet temperature based on the maximum flow rate difference, the outlet water set temperature, the inlet water temperature, and the total energy value includes:

[0016] The theoretical water flow rate is calculated based on the set outlet water temperature, the inlet water temperature, and the total energy value.

[0017] The theoretical fluctuating water flow rate is calculated based on the difference between the theoretical water flow rate and the maximum flow rate.

[0018] The theoretical fluctuating temperature is obtained by calculating the quotient of the total energy value and the theoretical fluctuating water flow rate.

[0019] The theoretical fluctuating temperature rise and the inlet water temperature are calculated to obtain the theoretical fluctuating outlet water temperature.

[0020] In one embodiment, the step of calculating the theoretical water flow rate based on the set outlet water temperature, the inlet water temperature, and the total energy value includes:

[0021] Calculate the difference between the set outlet water temperature and the inlet water temperature to obtain the theoretical temperature rise.

[0022] The theoretical water flow rate is obtained by calculating the quotient of the total energy value and the theoretical heating temperature.

[0023] In one embodiment, the step of calculating the theoretical fluctuating water flow rate based on the difference between the theoretical water flow rate and the maximum flow rate includes:

[0024] The theoretical fluctuating water flow rate is obtained by calculating the sum of the difference between the theoretical water flow rate and the maximum flow rate.

[0025] In one embodiment, prior to the step of obtaining the water flow rate of the water proportional valve at various opening degrees, the method further includes:

[0026] The opening degree of the water proportioning valve is adjusted sequentially at preset step intervals throughout the complete stroke to obtain the number of adjustments;

[0027] If the number of adjustments equals the preset number, then the water flow rate is obtained.

[0028] In one embodiment, after the step of ending the thermostatic adjustment of the gas water heater, the method further includes:

[0029] Obtain the current inlet water temperature after a preset interval;

[0030] The change in inlet water temperature is obtained based on the current inlet water temperature.

[0031] If the change in the inlet water temperature exceeds the preset threshold, the gas water heater will be re-adjusted to a constant temperature.

[0032] Secondly, this application also provides a constant temperature regulating device for a gas water heater. The device includes:

[0033] The flow detection module is used to obtain the water flow rate of the water proportional valve at different opening degrees;

[0034] The difference calculation module is used to calculate the difference in water flow based on the water flow rate under adjacent opening degrees;

[0035] The difference filtering module is used to filter out the maximum flow difference from the water flow difference;

[0036] The temperature calculation module is used to calculate the theoretical fluctuating outlet temperature based on the maximum flow difference, the outlet water set temperature, the inlet water temperature, and the total energy value.

[0037] The range setting module is used to obtain a stable outlet water temperature range based on the theoretical fluctuating outlet water temperature and the set outlet water temperature.

[0038] The temperature judgment module is used to terminate the constant temperature regulation of the gas water heater if the actual outlet water temperature falls within the stable outlet water temperature range.

[0039] Thirdly, this application also provides a gas water heater. The gas water heater includes:

[0040] Inlet water temperature probe, the inlet water temperature probe being used to detect the inlet water temperature;

[0041] A water outlet temperature probe, used to detect the water outlet temperature;

[0042] A water proportional valve is connected to the inlet water temperature probe and the outlet water temperature probe respectively, and the water proportional valve is used to control the water flow rate;

[0043] The main controller is connected to the inlet water temperature probe, the outlet water temperature probe and the water proportioning valve respectively, and the main controller is used to execute the steps of the method described in the first aspect embodiment above.

[0044] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, implements the steps of the method described in the first aspect of the embodiments.

[0045] The aforementioned method, device, gas water heater, and storage medium for constant temperature regulation of a gas water heater acquire the water flow rate at various opening degrees of the water proportional valve. Based on the water flow rate at adjacent opening degrees, the difference in water flow rate is calculated to obtain the maximum flow rate difference. Then, using the maximum flow rate difference, the set outlet water temperature, the inlet water temperature, and the total energy value, the theoretical fluctuating outlet water temperature is calculated to obtain the fluctuating outlet water temperature under the current water proportional valve setting, and a stable outlet water temperature is obtained. When the actual outlet water temperature is detected to be within the stable outlet water temperature range, the adjustment of the water proportional valve is stopped, ending the constant temperature regulation of the gas water heater. By determining whether the actual outlet water temperature is within the stable outlet water temperature range, constant temperature regulation of the gas water heater can be quickly completed, preventing the gas water heater from falling into oscillating regulation during constant temperature regulation. Attached Figure Description

[0046] Figure 1 This is a flowchart illustrating a method for constant temperature regulation of a gas water heater in one embodiment.

[0047] Figure 2 This is a schematic diagram of the process for detecting water flow rate in one embodiment;

[0048] Figure 3 This is a schematic diagram of the process for calculating the theoretical fluctuating outlet water temperature in one embodiment;

[0049] Figure 4 This is a schematic diagram of the process for calculating the theoretical water flow rate in one embodiment;

[0050] Figure 5 This is a flowchart illustrating the constant temperature regulation method for a gas water heater in another embodiment;

[0051] Figure 6 This is a flowchart illustrating the constant temperature regulation method for a gas water heater in yet another embodiment;

[0052] Figure 7 This is a schematic diagram of a gas water heater thermostat module in one embodiment;

[0053] Figure 8 This is a schematic diagram of the internal structure of a gas water heater in one embodiment. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0055] In one embodiment, such as Figure 1 As shown, a method for constant temperature regulation of a gas water heater is provided. Taking the application of this method to the main controller of a gas water heater as an example, the method includes the following steps:

[0056] Step S100: Obtain the water flow rate of the water proportional valve at different opening degrees.

[0057] Specifically, the main controller controls the opening of the water proportional valve by controlling a stepper motor. The water flow rate can be detected by a water flow sensor installed on the pipeline. When detecting the water flow rate at different opening degrees, the main controller can control the water proportional valve to adjust sequentially from the maximum opening to the minimum opening (or from the minimum opening to the maximum opening), and detect the water flow rate at each different opening degree. For example, if the stepper motor of the water proportional valve has a total of 2688 steps, and the program in the main controller is set to adjust in a fixed step of 32 steps, then adjusting the water proportional valve from the maximum opening to the minimum opening requires 2688 / 32 = 84 steps. Each step corresponds to one opening degree, and each opening degree corresponds to one water flow rate. Therefore, the main controller needs to collect 84 water flow rate data. It is understood that in some other embodiments, the fixed step of the stepper motor can also be set to other parameters such as 64.

[0058] Step S200: Calculate the difference in water flow rate based on the water flow rate of adjacent openings.

[0059] Specifically, after obtaining the water flow rate at each different opening degree, the difference between the water flow rate at two adjacent opening degrees is calculated sequentially to obtain the water flow rate difference. For example, after obtaining 84 different water flow rate values, 83 water flow rate differences can be obtained by calculating the difference between two adjacent values. It can be understood that when calculating the water flow rate difference, subtracting the smaller water flow rate value from the larger value will ensure that the water flow rate difference is always a positive number.

[0060] Step S300: Filter out the largest flow difference from the water flow difference values.

[0061] Specifically, after calculating multiple water flow rate differences, these differences are sorted according to their magnitude, and the largest difference is selected as the maximum flow rate difference. The maximum flow rate difference represents the greatest impact on the water flow rate after the stepper motor of the current proportional valve adjusts once at a fixed step distance. For example, the calculated maximum flow rate difference might be 0.5 L / min.

[0062] Step S400: Calculate the theoretical fluctuating outlet temperature based on the maximum flow difference, the set outlet temperature, the inlet temperature, and the total energy value.

[0063] Specifically, the set outlet water temperature is the user-preset desired outlet water temperature, which the main controller can directly retrieve from its memory. The inlet water temperature is detected by a temperature probe installed on the inlet pipe and sent to the main controller. The total energy value is the total energy of the gas water heater, determined by the heater's inherent properties. For example, a 16L gas water heater means that when the temperature rises by 25 degrees Celsius, the hot water output in one minute is 16L, and its corresponding total energy value is 16 * 25 = 400. A total energy value of 400 means that when the temperature rises by 1 degree Celsius, the hot water output in one minute is 400L. Based on the set outlet water temperature and the inlet water temperature, the required temperature can be determined. By combining this with the total energy value, the required water flow rate can be calculated. Then, by combining this with the maximum flow rate difference, the maximum fluctuation in water flow rate after one adjustment can be determined. Finally, by combining this with the total energy value, the maximum fluctuation in outlet water temperature after one adjustment can be determined. By combining this with the inlet water temperature again, the theoretical fluctuation in outlet water temperature can be obtained. It is understandable that the theoretical fluctuating outlet water temperature is the outlet water temperature obtained after the stepper motor is adjusted once near the set outlet water temperature and after the maximum fluctuation change.

[0064] Step S500: Obtain the stable outlet water temperature range based on the theoretical fluctuating outlet water temperature and the set outlet water temperature. Specifically, after obtaining the theoretical fluctuating outlet water temperature, use it as a range constraint on one side and the set outlet water temperature as a range constraint on the other side to obtain the corresponding stable outlet water temperature range. For example, if the obtained theoretical fluctuating outlet water temperature is 58.1℃ and the set outlet water temperature is 60℃, the corresponding stable outlet water temperature range is 58.1℃ to 60℃; if the obtained theoretical fluctuating outlet water temperature is 62.1℃ and the set outlet water temperature is 60℃, the corresponding stable outlet water temperature range is 60℃ to 62.1℃.

[0065] In step S600, if the actual outlet water temperature is within the stable outlet water temperature range, the thermostatic adjustment of the gas water heater is terminated.

[0066] Specifically, the actual outlet water temperature is detected by a temperature probe installed on the outlet pipe and sent to the main controller. During the thermostatic adjustment process, the gas water heater regulates the outlet water temperature by adjusting the opening of the proportional valve, bringing the actual outlet water temperature closer to the set outlet water temperature. This embodiment sets a stable outlet water temperature range, and terminates the thermostatic adjustment of the gas water heater once the actual outlet water temperature falls within this range. It is understood that during the process of controlling the stepper motor of the proportional valve to adjust the actual outlet water temperature, there must exist a stable outlet water temperature range. When the actual outlet water temperature is detected to be within this stable range, the thermostatic adjustment of the gas water heater can be terminated, thus preventing the gas water heater from repeatedly oscillating around the set outlet water temperature in an attempt to adjust to the set temperature, which would affect the efficiency of the thermostatic adjustment.

[0067] The aforementioned method for constant temperature regulation of gas water heaters involves acquiring the water flow rate at various opening degrees of the water proportional valve, calculating the flow rate difference based on adjacent opening degrees to obtain the maximum flow rate difference, and then calculating the theoretical fluctuating outlet temperature using the maximum flow rate difference, the set outlet water temperature, the inlet water temperature, and the total energy value. This yields the fluctuating outlet temperature under the current water proportional valve setting and a stable outlet temperature. When the actual outlet water temperature is detected to be within the stable outlet temperature range, the adjustment of the water proportional valve is stopped, ending the constant temperature regulation of the gas water heater. By determining whether the actual outlet water temperature falls within the stable outlet temperature range, constant temperature regulation of the gas water heater can be quickly completed, preventing the gas water heater from entering a fluctuating regulation state during constant temperature regulation.

[0068] In one embodiment, such as Figure 2 As shown, step S100, which involves obtaining the water flow rate of the water proportional valve at different opening degrees, includes:

[0069] Step S110: The opening degree of the water proportional valve is adjusted sequentially from the maximum opening degree to the minimum opening degree.

[0070] Specifically, in this embodiment, when the gas water heater operates for the first time after being powered on, the opening degree of the water proportional valve is controlled from the maximum opening to the minimum opening by controlling the stepper motor of the water proportional valve. That is, the water proportional valve is controlled to reduce from the maximum opening in fixed steps until it reaches the minimum opening. In some other embodiments, the opening degree of the water proportional valve can also be controlled to be adjusted from the minimum opening to the maximum opening.

[0071] Step S120: Detect the water flow rate of the water proportional valve at different opening degrees.

[0072] Specifically, during the adjustment of the water proportional valve's opening, the water flow rate at the current opening is acquired after each adjustment. For example, adjusting the water proportional valve from its maximum opening to its minimum opening requires 84 adjustments, and the corresponding water flow rate also needs to be acquired 84 times.

[0073] In one embodiment, such as Figure 3 As shown, step S400, which involves calculating the theoretical fluctuating outlet water temperature based on the maximum flow rate difference, the set outlet water temperature, the inlet water temperature, and the total energy value, includes:

[0074] Step S410: Calculate the theoretical water flow rate based on the set outlet water temperature, inlet water temperature, and total energy value.

[0075] Specifically, when the water flow rate of the gas water heater is at the theoretical water flow rate, the gas water heater can heat water at the inlet temperature to the outlet set temperature, which can be calculated from the outlet set temperature, the inlet temperature, and the total energy value.

[0076] Step S420: Calculate the theoretical fluctuating water flow rate based on the difference between the theoretical water flow rate and the maximum flow rate.

[0077] Specifically, the theoretical fluctuating flow rate after one adjustment can be obtained by subtracting or adding the maximum flow rate difference from the theoretical flow rate.

[0078] Step S430: Calculate the quotient of the total energy value and the theoretical fluctuating water flow rate to obtain the theoretical fluctuating temperature rise.

[0079] Specifically, the theoretical fluctuating temperature can be obtained by dividing the total energy value by the theoretical fluctuating water flow rate. For example, if the outlet water temperature is set to 60℃, the inlet water temperature is 20℃, and the total energy value is 400, the corresponding theoretical water flow rate is 400 / (60-20) = 10L / min. If the maximum flow rate difference is 0.5L / min, and the theoretical fluctuating water flow rate is 10 + 0.5 = 10.5L / min, the calculated theoretical fluctuating temperature is 400 / 10.5 = 38.1℃.

[0080] Step S440: Calculate the sum of the theoretical fluctuating temperature rise and the inlet water temperature to obtain the theoretical fluctuating outlet water temperature.

[0081] Specifically, the theoretical fluctuating temperature rise and the inlet water temperature can be added together to obtain the theoretical fluctuating outlet water temperature. For example, if the theoretical fluctuating temperature rise is 38.1℃ and the inlet water temperature is 20℃, the theoretical fluctuating outlet water temperature is 38.1 + 20 = 58.1℃, and the corresponding stable outlet water temperature range is 58.1℃ to 60℃.

[0082] In one embodiment, such as Figure 4As shown, step S410, which involves calculating the theoretical water flow rate based on the set outlet water temperature, inlet water temperature, and total energy value, includes:

[0083] Step S411: Calculate the difference between the set water temperature and the inlet water temperature to obtain the theoretical heating temperature.

[0084] Step S412: Calculate the quotient of the total energy value and the theoretical heating temperature to obtain the theoretical water flow rate.

[0085] Specifically, let the inlet water temperature be t1, the set outlet water temperature be t2, and the total energy value be Q. Then the theoretical heating temperature is t2-t1, and the theoretical water flow rate is Q / (t2-t1). For example, when the inlet water temperature is 20℃, the set outlet water temperature is 60℃, and the total energy value is 400, the theoretical heating temperature is 40℃, and the theoretical water flow rate is 10L / min. That is, when the gas water heater's water flow rate is 10L / min, it can heat inlet water from 20℃ to 60℃.

[0086] In one embodiment, step S420, which involves calculating the theoretical fluctuating water flow based on the difference between the theoretical water flow and the maximum flow, includes: calculating the sum of the theoretical water flow and the difference between the maximum flow to obtain the theoretical fluctuating water flow.

[0087] Specifically, in this embodiment, the theoretical fluctuating water flow rate is the sum of the theoretical water flow rate and the difference between the maximum flow rate and the maximum flow rate. For example, if the maximum flow rate difference is qΔmax, then the theoretical fluctuating water flow rate is Q / (t2-t1)+qΔmax. When the inlet water temperature is 20℃, the outlet water set temperature is 60℃, the total energy value is 400, and the maximum flow rate difference is 0.5L / min, the theoretical fluctuating water flow rate is 10.5L / min, the corresponding theoretical fluctuating temperature rise is 400 / 10.5=38.1℃, and the stable outlet water range is 58.1℃ to 60℃. In some other embodiments, the difference between the theoretical water flow rate and the maximum flow rate difference can also be calculated to obtain the theoretical fluctuating water flow rate. For example, in this case, the theoretical fluctuating water flow rate is 9.5L / min, the corresponding theoretical fluctuating temperature rise is 400 / 9.5=42.1℃, and the stable outlet water range is 60℃ to 62.1℃.

[0088] In one embodiment, such as Figure 5 As shown, before the step of obtaining the water flow rate of the water proportional valve at different opening degrees in step S100, the gas water heater constant temperature regulation method further includes:

[0089] In step S710, the opening degree of the water proportion valve is adjusted sequentially with a preset step distance during the complete stroke to obtain the number of adjustments.

[0090] Specifically, a complete stroke is the opening of the water proportional valve from its maximum to its minimum, or from its minimum to its maximum. The preset step distance is a pre-set fixed step distance, such as 32 or 64. The number of adjustments is the actual number of adjustments made within a complete stroke using the preset step distance.

[0091] Step S720: If the number of adjustments is equal to the preset number of adjustments, then obtain the water flow rate.

[0092] Specifically, the preset number of adjustments is the theoretical total number of times the water proportional valve can be adjusted. For example, if the water proportional valve stepper motor has a total of 2688 steps and the preset step size is 32 steps, then the preset number of adjustments is 84. When the detected number of adjustments equals the preset number, it indicates that the stepper motor is operating normally, and the subsequent steps of acquiring water flow can proceed. When the number of adjustments does not equal the preset number, it indicates that there is a problem with the stepper motor. In this case, it can be restarted, and the number of adjustments can be re-acquired until it equals the preset number.

[0093] In one embodiment, such as Figure 6 As shown, in step S600, after the step of ending the constant temperature regulation of the gas water heater, the constant temperature regulation method for the gas water heater further includes:

[0094] Step S810: Obtain the current inlet water temperature after a preset time interval.

[0095] Specifically, different inlet water temperatures affect the thermostat of a gas water heater. Therefore, the current inlet water temperature needs to be retrieved again after a preset interval (such as 1 day).

[0096] Step S820: Obtain the inlet water temperature change value based on the current inlet water temperature.

[0097] Specifically, the current inlet water temperature is re-acquired and compared with the inlet water temperature during constant temperature adjustment to obtain the inlet water temperature change value. The larger the inlet water temperature change value, the greater the change in inlet water temperature.

[0098] In step S830, if the change in inlet water temperature is greater than the preset change threshold, the gas water heater is re-adjusted to a constant temperature.

[0099] Specifically, when the detected change in inlet water temperature exceeds the preset threshold, the gas water heater needs to be readjusted using the aforementioned temperature control steps to reassess the stable water output range. For example, if the preset threshold is set to ±5℃, and the change in inlet water temperature exceeds ±5℃, the gas water heater needs to be readjusted.

[0100] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0101] Based on the same inventive concept, this application also provides a gas water heater constant temperature regulation device for implementing the gas water heater constant temperature regulation method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more gas water heater constant temperature regulation device embodiments provided below can be found in the limitations of the gas water heater constant temperature regulation method described above, and will not be repeated here.

[0102] In one embodiment, such as Figure 7 As shown, a gas water heater thermostatic control device is provided, including: a flow detection module 910, a difference calculation module 920, a difference filtering module 930, a temperature calculation module 940, a range setting module 950, and a temperature judgment module 960, wherein:

[0103] The flow detection module 910 is used to obtain the water flow rate of the water proportional valve at different opening degrees.

[0104] The difference calculation module 920 is used to calculate the difference in water flow based on the water flow rate at adjacent openings.

[0105] The difference filtering module 930 is used to filter out the maximum flow difference from the water flow difference;

[0106] Temperature calculation module 940 is used to calculate the theoretical fluctuating outlet temperature based on the maximum flow difference, the set outlet temperature, the inlet temperature, and the total energy value.

[0107] The range setting module 950 is used to obtain a stable outlet water temperature range based on the theoretical fluctuation outlet water temperature and the set outlet water temperature.

[0108] The temperature judgment module 960 is used to terminate the constant temperature regulation of the gas water heater if the actual outlet water temperature is within the stable outlet water temperature range.

[0109] The various modules in the aforementioned gas water heater thermostat can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0110] In one embodiment, such as Figure 8 As shown, this application also proposes a gas water heater, comprising:

[0111] Inlet water temperature probe 101 is used to detect the inlet water temperature;

[0112] Water outlet temperature probe 102 is used to detect the water outlet temperature.

[0113] Water proportional valve 103 is connected to inlet water temperature probe 101 and outlet water temperature probe 102 respectively. Water proportional valve 103 is used to control water flow.

[0114] The main controller 104 is connected to the inlet water temperature probe 101, the outlet water temperature probe 102 and the water proportioning valve 103 respectively. The main controller 104 is used to execute the steps in the above method embodiments.

[0115] Specifically, the inlet water temperature probe 101 and the water proportioning valve 103 are installed on the inlet water pipe. One end of the inlet water temperature probe 101 is connected to the inlet water port, and the other end is connected to the water proportioning valve 103. The outlet water temperature probe 102 is installed on the outlet water pipe. One end of the outlet water temperature probe 102 is connected to the outlet water port, and the other end is connected to the heat exchanger 105. The burner 106 is used to exchange heat with the water in the water pipe through the heat exchanger 105. The main controller 104 is communicatively connected to the inlet water temperature probe 101, the outlet water temperature probe 102, and the water flow sensor (not shown in the figure), and is used to detect the inlet water temperature, the outlet water temperature, and the water flow rate. The main controller 104 has a control program installed inside, and the steps in the above-described method embodiments are implemented by executing the control program.

[0116] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the above-described method embodiments.

[0117] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0118] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0119] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for constant temperature regulation of a gas water heater, characterized in that, The method includes: To obtain the water flow rate of the water proportional valve at different opening degrees; Calculate the difference in water flow rate based on the water flow rate at adjacent opening degrees; The maximum flow rate difference is selected from the water flow rate differences. The calculation of the theoretical fluctuating outlet temperature based on the maximum flow rate difference, the set outlet temperature, the inlet temperature, and the total energy value includes: calculating the theoretical water flow rate based on the set outlet temperature, the inlet temperature, and the total energy value; calculating the theoretical fluctuating water flow rate based on the theoretical water flow rate and the maximum flow rate difference; calculating the quotient of the total energy value and the theoretical fluctuating water flow rate to obtain the theoretical fluctuating temperature rise; and calculating the sum of the theoretical fluctuating temperature rise and the inlet temperature to obtain the theoretical fluctuating outlet temperature. A stable outlet water temperature range is obtained based on the theoretical fluctuation outlet water temperature and the set outlet water temperature. If the actual outlet water temperature falls within the stable outlet water temperature range, the thermostatic adjustment of the gas water heater will be terminated.

2. The method according to claim 1, characterized in that, The step of obtaining the water flow rate of the water proportional valve at different opening degrees includes: The opening degree of the water proportional valve is controlled to be adjusted sequentially from the maximum opening degree to the minimum opening degree; The water flow rate of the water proportional valve is detected at different opening degrees.

3. The method according to claim 1, characterized in that, The step of calculating the theoretical water flow rate based on the set outlet water temperature, the inlet water temperature, and the total energy value includes: Calculate the difference between the set outlet water temperature and the inlet water temperature to obtain the theoretical temperature rise. The theoretical water flow rate is obtained by calculating the quotient of the total energy value and the theoretical heating temperature.

4. The method according to claim 1, characterized in that, The step of calculating the theoretical fluctuating water flow rate based on the difference between the theoretical water flow rate and the maximum flow rate includes: The theoretical fluctuating water flow rate is obtained by calculating the sum of the difference between the theoretical water flow rate and the maximum flow rate.

5. The method according to any one of claims 1 to 4, characterized in that, Before the step of obtaining the water flow rate of the water proportional valve at different opening degrees, the method further includes: The opening degree of the water proportioning valve is adjusted sequentially at preset step intervals throughout the complete stroke to obtain the number of adjustments; If the number of adjustments equals the preset number, then the water flow rate is obtained.

6. The method according to claim 5, characterized in that, After the step of ending the constant temperature regulation of the gas water heater is completed, the method further includes: Obtain the current inlet water temperature after a preset interval; The change in inlet water temperature is obtained based on the current inlet water temperature. If the change in the inlet water temperature exceeds the preset threshold, the gas water heater will be re-adjusted to a constant temperature.

7. A constant temperature regulating device for a gas water heater, characterized in that, The device includes: The flow detection module is used to obtain the water flow rate of the water proportional valve at different opening degrees; The difference calculation module is used to calculate the difference in water flow based on the water flow rate under adjacent opening degrees; The difference filtering module is used to filter out the maximum flow difference from the water flow difference; The temperature calculation module is used to calculate the theoretical fluctuating outlet water temperature based on the maximum flow rate difference, the outlet water set temperature, the inlet water temperature, and the total energy value. This includes: calculating the theoretical water flow rate based on the outlet water set temperature, the inlet water temperature, and the total energy value; calculating the theoretical fluctuating water flow rate based on the theoretical water flow rate and the maximum flow rate difference; calculating the quotient of the total energy value and the theoretical fluctuating water flow rate to obtain the theoretical fluctuating temperature rise; and calculating the sum of the theoretical fluctuating temperature rise and the inlet water temperature to obtain the theoretical fluctuating outlet water temperature. The range setting module is used to obtain a stable outlet water temperature range based on the theoretical fluctuating outlet water temperature and the set outlet water temperature. The temperature judgment module is used to terminate the constant temperature regulation of the gas water heater if the actual outlet water temperature falls within the stable outlet water temperature range.

8. A gas water heater, characterized in that, include: Inlet water temperature probe, the inlet water temperature probe being used to detect the inlet water temperature; A water outlet temperature probe, used to detect the water outlet temperature; A water proportional valve is connected to the inlet water temperature probe and the outlet water temperature probe respectively, and the water proportional valve is used to control the water flow rate; A main controller is connected to the inlet water temperature probe, the outlet water temperature probe, and the water proportioning valve, and the main controller is used to execute the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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