Gas water heater undervoltage identification method, gas water heater, electronic equipment and storage medium

Abstract

The invention discloses a gas water heater undervoltage identification method, a gas water heater, electronic equipment and a storage medium, and the method comprises the steps: obtaining the current output load of the gas water heater, the control current of a gas proportional valve and the current rotating speed of a fan in real time, and determining whether the fan is blocked or not according to the preset fan rotating speed corresponding to the control current and the current rotating speed; when the draught fan is blocked, a first preset output load corresponding to the control current when the draught fan is not blocked and a second preset output load when the draught fan is blocked are obtained, and whether the gas water heater is in an under-voltage state or not is judged based on the current output load, the first preset output load and the second preset output load; wherein the first preset output load and the second preset output load are the loads of the gas water heater under the standard gas pressure. The undervoltage identification error caused by load reduction due to fan blockage is avoided, the undervoltage identification accuracy is improved, an air pressure sensor does not need to be arranged at the gas proportional valve, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas water heaters, and particularly relates to a gas water heater under-pressure identification method, a gas water heater, an electronic device and a storage medium. BACKGROUND

[0002] Comfortable bathing with a gas water heater has become a development trend in the water heater industry. In some cold regions, the gas consumption is relatively large, and during the peak period of gas consumption, insufficient gas pressure (under-pressure) may occur, which reduces the gas flow rate, and thus the load of the gas water heater is reduced, affecting the use of hot water by users. Therefore, if the gas water heater is detected to be in an under-pressure state, an appropriate under-pressure adjustment strategy will be implemented for adjustment. The under-pressure adjustment strategy usually includes limiting the maximum fan speed or limiting the maximum proportional valve control current. If the under-pressure adjustment strategy is implemented due to under-pressure misjudgment, it may lead to excessive flue gas or limit the current load growth. Therefore, how to accurately determine whether the gas water heater is under pressure is a problem to be solved. SUMMARY

[0003] The present application provides a gas water heater under-pressure identification method, a gas water heater, an electronic device and a storage medium to solve the problem of under-pressure misjudgment when identifying the under-pressure of a gas water heater in the prior art.

[0004] In a first aspect, the present application provides a gas water heater under-pressure identification method, wherein the combustion mode of the gas water heater is positive pressure combustion, and the method comprises:

[0005] real-time acquiring a current output load of the gas water heater, a control current of a gas proportional valve and a current speed of a fan;

[0006] determining whether the fan is blocked according to a preset fan speed corresponding to the control current and the current speed;

[0007] when the fan is blocked, acquiring a first preset output load and a second preset output load corresponding to the control current, and determining whether the gas water heater is in an under-pressure state based on the current output load, the first preset output load and the second preset output load;

[0008] wherein the first preset output load is an output load of the gas water heater under a standard gas pressure when the fan is not blocked;

[0009] the second preset output load is an output load of the gas water heater under a standard gas pressure when the fan is blocked.

[0010] The gas water heater under-voltage identification method provided by the application first determines the blockage condition of the fan, when the fan is blocked, the influence of the fan blockage on the output load is considered, and then whether the gas water heater is in an under-voltage state is judged according to the second preset output load when the fan is blocked, the current output load and the first preset output load. The current output load and the second preset output load can determine the total influence of the blockage and the under-voltage of the gas water heater on the output load, and the current output load and the first preset output load can determine the influence of the blockage on the output load. Therefore, the influence of the blockage on the output load can be excluded from the total influence of the blockage and the under-voltage on the output load, and the influence of the under-voltage on the output load can be inferred. The whole under-voltage identification process has logic and rationality, avoids the load drop caused by the fan blockage and thus causes the under-voltage identification error, improves the accuracy of the under-voltage identification, reduces the risk of entering the under-voltage adjustment strategy due to the under-voltage misjudgment, and does not need to set a gas pressure sensor, thereby saving the equipment cost.

[0011] In a second aspect, the application provides a gas water heater, the combustion mode of the gas water heater being positive pressure combustion, the gas water heater comprising a main controller, the main controller comprising:

[0012] a detection module configured to acquire a current output load of the gas water heater, a control current of a gas proportional valve and a current rotating speed of the fan in real time;

[0013] a blockage judgment module configured to determine whether the fan is blocked according to a preset rotating speed of the fan corresponding to the control current and the current rotating speed;

[0014] a first under-voltage judgment module configured to, when the fan is blocked, acquire a first preset output load and a second preset output load corresponding to the control current, and judge whether the gas water heater is in an under-voltage state based on the current output load, the first preset output load and the second preset output load;

[0015] wherein the first preset output load is an output load of the gas water heater under a standard gas pressure when the fan is not blocked;

[0016] the second preset output load is an output load of the gas water heater under the standard gas pressure when the fan is blocked.

[0017] In a third aspect, the application provides an electronic device, the electronic device comprising:

[0018] at least one processor; and

[0019] a memory in communication with the at least one processor; wherein

[0020] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the gas water heater under-voltage identification method of the first aspect of the present application.

[0021] In a fourth aspect, the present application provides a computer readable storage medium storing computer instructions for enabling a processor to implement the gas water heater under-voltage identification method of the first aspect of the present application when executed by the processor.

[0022] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0024] Figure 1 is a flow chart of a gas water heater under-voltage identification method provided by an embodiment of the present application;

[0025] Figure 2 is a structural schematic diagram of a gas water heater provided by an embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the relationship between the control current of a gas proportional valve and the fan speed provided by an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the relationship between the fan speed and the output load when the fan is blocked provided by an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of the relationship between the control current of a gas proportional valve and the output load under different conditions provided by an embodiment of the present application;

[0029] Figure 6 is a flow chart of a gas water heater under-voltage identification method provided by an embodiment of the present application;

[0030] Figure 7 is a structural schematic diagram of a main controller provided by an embodiment of the present application;

[0031] Figure 8 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person of ordinary skill in the art without creative labor should belong to the protection scope of the present application.

[0033] The embodiment of the present application provides an under-voltage identification method of a gas water heater. The embodiment can be applied to accurately identify the under-voltage of the gas water heater. The method can be executed by a main controller in the gas water heater. The main controller can be realized in the form of hardware and / or software. The main controller can be configured in an electronic device.

[0034] The combustion mode of the gas water heater in the embodiment of the present application is positive pressure combustion. The pressure in the combustion chamber of the gas water heater is higher than the atmospheric pressure, that is, the positive pressure, and the pressure needs to be maintained by the fan. Exemplarily, the type of the fan can be a down fan. The down fan forms a positive pressure environment for the combustion chamber by installing the fan below the combustion chamber.

[0035] Figure 1 A flow chart of an under-voltage identification method of a gas water heater provided by the embodiment of the present application is shown in FIG. 1. The under-voltage identification method of the gas water heater includes the following steps. Figure 1

[0036] S101, real-time acquisition of a current output load of the gas water heater, a control current of a gas proportional valve and a current rotating speed of the fan.

[0037] The current rotating speed of the fan can be acquired by a fan rotating speed detection module. The fan rotating speed detection module includes any one of the following modes, such as a mechanical rotating speed meter, an encoder and a sensor. The mechanical rotating speed meter and the encoder are both installed on the rotating shaft of the fan. The mechanical rotating speed meter can directly read the current rotating speed of the fan. The encoder calculates the rotating speed by a pulse signal. The sensor includes a photoelectric sensor and a Hall sensor.

[0038] The gas proportional valve internally adopts a proportional electromagnet. The driving force of the proportional electromagnet is linearly related to the current size. The current size is also linearly related to the opening degree of the proportional valve.

[0039] Optionally, the water outlet and the water inlet of the gas water heater are also provided with a temperature sensor. The water inlet is also provided with a water flow sensor.

[0040] The fan rotating speed detection module, the gas proportional valve, the temperature sensor and the water flow sensor are all connected with the main controller of the gas water heater.​

[0041] Figure 2 This is a structural diagram of a gas water heater, such as... Figure 2 As shown, the gas water heater includes a main control unit 21, a heat exchanger 21, a combustion chamber 22, a fan 23, an inlet pipe 24, and an outlet pipe 25. A, B, and C are the water inlet, water outlet, and gas inlet, respectively. A water flow sensor 26 is installed at one end of the inlet pipe 24. Temperature sensors 27 are installed at both the inlet A and outlet B. Gas enters through the gas inlet C and its flow rate is regulated by a gas proportional valve 28, thus adjusting the output load. Additionally, a fan speed detection module is installed on the fan. Figure 2 (Not shown in the image) The fan speed detection module, gas proportional valve 28, temperature sensor 27 and water flow sensor 26 are all connected to the main controller 20. The above-mentioned components connected to the main controller 20 can send data to the main controller 20 and / or be controlled by the main controller 20 to adjust the parameters of the corresponding components.

[0042] S102. Determine whether the fan is blocked based on the preset fan speed corresponding to the control current and the current speed.

[0043] The output load of a gas water heater is mainly related to the air intake flow rate, pressure, and gas flow rate of the fan. The air intake flow rate and pressure are related to whether the fan is blocked, while the gas flow rate is positively correlated with the control current (of the main controller to the gas proportional valve).

[0044] In gas water heaters, the relationship between fan speed and control current is mainly reflected in the coordinated adjustment of output load. When an increase in output load is required, the gas flow can be increased by increasing the control current, while the fan speed increases to enhance gas-air mixing and ensure complete combustion. Therefore, the relationship between control current and fan speed is usually preset. Figure 3 This is a schematic diagram showing the relationship between the control current of a gas proportional valve and the fan speed, as shown below. Figure 3 As shown, the control current of the gas proportional valve is positively correlated with the fan speed.

[0045] Based on the known control current of the gas proportional valve, the fan speed corresponding to the known control current can be obtained by using the relationship between the known gas proportional valve control current and the fan speed, thus obtaining the preset fan speed.

[0046] The fan may become blocked due to the flue blockage, foreign objects (oil, hair, etc.) stuck in the air, dust accumulation, etc. Under the same fan speed, the air volume and air pressure of the blocked fan are reduced compared to the unblocked fan.

[0047] In order to ensure the stable operation of the gas water heater, the fan is usually a constant power fan, that is, the power is kept constant, the fan power is proportional to the air volume and the air pressure, and when the fan is in normal working condition, the air volume and the air pressure tend to be stable, and the fan speed also tends to be stable. When the fan is blocked, the air volume and the air pressure decrease, and the fan power decreases. In order to ensure that the fan power does not change, the fan speed will be controlled to increase to increase the air volume and the air pressure. Specifically, the fan control current is increased by the main controller to increase the fan speed. The higher the degree of blockage, the greater the fan control current, and the higher the corresponding fan speed. Therefore, when the current speed of the fan is greater than the preset fan speed, it can be determined that the fan is blocked, and S103 is executed. When the current speed is not greater than the preset fan speed, it can be determined that the fan is not blocked.

[0048] S103, when the fan is blocked, the first preset output load and the second preset output load corresponding to the control current are obtained, and whether the gas water heater is in an under-pressure state is judged based on the current output load, the first preset output load and the second preset output load.

[0049] Whether the fan is blocked and whether the gas water heater is in an under-pressure state are independent events, so further judgment is still needed to determine whether the gas water heater is in an under-pressure state when it is determined that the fan is blocked.

[0050] The first preset output load and the second preset output load are the output load of the gas water heater under standard gas pressure. The difference is that the first preset output load is the output load of the gas water heater under standard pressure and without fan blockage, and the second preset output load is the output load of the gas water heater under standard pressure and with fan blockage.

[0051] In an optional embodiment, the second preset output load can be set to a fixed value. In another optional embodiment, Figure 4 A schematic diagram of the relationship between the fan speed and the output load when the fan is blocked is shown in FIG. 1. Figure 4 As shown in FIG. 1, the greater the fan speed, the smaller the corresponding output load. This is because the higher the fan speed, the higher the degree of fan blockage. Even if the fan speed is increased accordingly, it is still difficult to maintain the initial preset fan power, so the inlet air flow is small and cannot make the gas and air mix and burn sufficiently, resulting in a decrease in the output load. As shown in FIG. 1, when the fan is blocked, the current speed of the fan can be determined from the curve to determine the corresponding output load, and the second preset output load is obtained. Figure 4

[0052] ​In an optional embodiment, when the fan is known to be blocked, a second preset output load can be compared with the current output load. Generally, if the current output load is still less than the second preset output load, it indicates that the current output load is affected not only by the fan blockage but also by the undervoltage factor of the gas water heater, thus determining that the gas water heater is in an undervoltage state. Furthermore, the load reduction rate of the current output load relative to the second preset output load can be calculated. When this load reduction rate is greater than a preset first threshold, it is determined that the gas water heater is in an undervoltage state.

[0053] In another optional embodiment, when the fan is known to be blocked, the second preset output load and the load reduction rate of the current output load relative to the first preset output load can be calculated respectively. Then, it is determined whether the difference between the load reduction rate corresponding to the current output load and the load reduction rate corresponding to the second preset output load is large (for example, if it is greater than the preset second threshold, the difference is large). When the difference is large, it can be determined that the gas water heater is in an undervoltage state.

[0054] This invention provides a method for identifying undervoltage in gas water heaters. The method first determines the blockage status of the fan. When the fan is blocked, the impact of the blockage on the output load needs to be considered. The method then determines whether the gas water heater is in an undervoltage state based on a second preset output load, the current output load, and a first preset output load when the fan is blocked. The current output load and the second preset output load determine the total impact of the blockage and undervoltage on the output load, while the current output load and the first preset output load determine the impact of the blockage on the output load. Therefore, the impact of the blockage on the output load can be excluded from the total impact of the blockage and undervoltage, thus inferring the impact of undervoltage on the output load. The entire undervoltage identification process is logical and reasonable, avoiding undervoltage identification errors caused by load drops due to fan blockage, improving the accuracy of undervoltage identification, reducing the risk of entering an undervoltage adjustment strategy due to misjudgment, and eliminating the need for a gas pressure sensor, thus saving equipment costs.

[0055] In an optional embodiment, the gas water heater undervoltage identification method further includes: real-time detection of the current outlet water temperature, inlet water temperature, and water flow rate of the gas water heater; and calculation of the current output load corresponding to the control current based on the outlet water temperature, inlet water temperature, and water flow rate.

[0056] That is, to calculate the current output load under the control current. For example, the current output load is calculated as follows:

[0057] Current output load = (outlet water temperature - inlet water temperature) × water flow rate × water heat capacity ratio.

[0058] In an optional embodiment, the determination of whether the fan is blocked according to the preset fan rotating speed corresponding to the control current and the current rotating speed comprises: determining the preset fan rotating speed corresponding to the control current; determining whether the ratio of the current rotating speed to the preset fan rotating speed is greater than a preset multiple value; if yes, determining that the fan is blocked; and if no, determining that the fan is not blocked.

[0059] The control current is the control current of the gas proportional valve, which has been described above. Under normal circumstances, the control current and the fan rotating speed are in a corresponding relationship, i.e., the control current corresponds to the preset fan rotating speed. When the ratio of the actual fan rotating speed to the preset fan rotating speed is greater than a preset multiple value, it is determined that the main controller controls the fan rotating speed to increase due to the blockage of the fan, i.e., it is determined that the fan is blocked. Otherwise, it is determined that the fan is not blocked. The preset multiple value can be set according to actual needs. For example, the preset multiple value is 2.

[0060] In an optional embodiment, the determination of whether the gas water heater is in an under-pressure state based on the current output load, the first preset output load, and the second preset output load comprises:

[0061] Based on the second preset output load and the first preset output load, a first influence degree of the blockage of the fan on the output load is determined. Based on the current output load and the first preset output load, a total influence degree of the blockage of the fan and the under-pressure of the gas water heater on the output load is determined. According to the total influence degree and the first influence degree, a second influence degree of the under-pressure of the gas water heater on the output load is determined. When the second influence degree reaches a preset degree, it is determined that the gas water heater is in an under-pressure state.

[0062] The first preset output load is the load under the condition of standard pressure and unblocked fan, and the second preset output load is the output load under the condition of standard pressure and blocked fan. The difference between the two lies in the blockage of the fan. Therefore, based on the first preset output load and the second output load, the first influence degree of the blockage of the fan on the output load can be determined. The current output load is the actual output load corresponding to the control current, and the first preset output load is the preset output load corresponding to the control current. The difference between the two lies in the fan state and the under-pressure state of the gas proportional valve affecting the output load of the gas water heater. Therefore, based on the first preset output load and the current output load, the total influence degree of the blockage of the fan and the under-pressure of the gas water heater on the output load can be determined. Then, according to the total influence degree and the first influence degree, the second influence degree of the under-pressure of the gas water heater on the output load can be determined. When the second influence degree reaches a preset degree, it is determined that the gas water heater is in an under-pressure state.

[0063] In an optional embodiment, the first influence degree is a first load difference value of the second preset output load relative to the first preset output load, and the total influence degree is a second load difference value of the current output load relative to the first preset output load; the second influence degree is a difference value of the second load difference value and the first load difference value, and the preset degree is a preset difference value, which is used to represent an output load drop amount caused by the under-voltage; when the second influence degree is greater than the preset difference value, it is determined that the gas water heater is in the under-voltage state.

[0064] In an optional embodiment, the first influence degree is a load drop ratio of the second preset output load relative to the first preset output load, and the total influence degree is a load drop ratio of the current output load relative to the first preset output load; the second influence degree is a load drop ratio difference value of the total influence degree and the first influence degree, and the preset degree is a preset ratio, which is used to represent a load drop ratio caused by the under-voltage; when the second influence degree is greater than the preset ratio, it is determined that the gas water heater is in the under-voltage state.

[0065] Figure 5 A schematic diagram of the relationship between the control current and the output load of the gas proportional valve under different conditions is shown in FIG. 1. Figure 5 As shown in FIG. 1, the “standard pressure” curve is a relationship curve between the control current and the output load of the gas water heater when the standard pressure and the fan are not blocked, the “under-voltage 500 pa” curve is a relationship curve between the control current and the output load of the gas water heater when the gas water heater is under-voltage 500 pa and the fan is not blocked, and the “standard pressure blockage” curve is a relationship curve between the control current and the output load of the gas water heater when the standard pressure and the fan are blocked. As can be seen from the above relationship curves, when the fan is blocked or under-voltage, the output load of the gas water heater will decrease, but the degree of the output load decrease is different.

[0066] Therefore, in the embodiment, first, a second load drop ratio of the second preset output load relative to the first preset output load is calculated, the second preset output load is the output load when the standard pressure and the fan are blocked, that is, the load drop ratio when only the fan is blocked and there is no under-voltage; then, a load drop ratio of the current output load relative to the first preset output load is calculated, that is, the total load drop ratio when both the fan is blocked and there is no under-voltage; and then, the total load drop ratio and the load drop ratio when only the fan is blocked are compared, so as to determine the load drop ratio caused by the under-voltage. If the load drop ratio caused by the under-voltage is large, it indicates that not only the fan is blocked, but also the under-voltage exists. If the difference is small (within the allowable range), it is determined that only the fan is blocked and there is no under-voltage.

[0067] The calculation formula of the second influence degree (the load drop ratio D1) is as follows:

[0068] D1 = (Q - Q1) / Q - (Q - Q2) / Q

[0069] Wherein, Q1 is the current output load, Q is the first preset output load, and Q2 is the second preset output load.

[0070] Optionally, considering the deviation of other components and gas, the preset proportion is set to 18%-22%, and of course can be set to other values, which can be set according to actual needs, and the application does not limit this.

[0071] In an optional embodiment, the under-pressure identification of the gas water heater further includes:

[0072] When the fan is not blocked, it is judged whether the gas water heater is in an under-pressure state according to the first preset output load and the current output load.

[0073] This embodiment continues to perform under-pressure identification when it is determined that the fan is not blocked. After the influence of fan blockage on under-pressure identification is excluded, the under-pressure state of the gas water heater can be normally identified.

[0074] The first preset output load is a preset output load corresponding to the control current when the fan is not blocked. When the fan is not blocked, the current output load is a preset output load corresponding to the control current when the fan is not blocked. When the gas water heater is in an under-pressure state, the gas flow will decrease, and the current output load corresponding to the control current will be less than the first preset output load. Therefore, when the fan is not blocked, the influence of the under-pressure of the gas water heater on the output load can be judged based on the difference between the first preset output load and the current output load.

[0075] In an optional embodiment, the difference between the first preset output load and the current output load is calculated, and when the difference is greater than a preset difference, it is determined that the gas water heater is in an under-pressure state.

[0076] In an optional embodiment, the judgment of whether the gas water heater is in an under-pressure state according to the first preset output load and the current output load includes: determining a load drop proportion based on the current output load and the first preset output load; if the load drop proportion is greater than a preset proportion, it is determined that the gas water heater is in an under-pressure state, and the preset proportion is used to represent the load drop proportion due to under-pressure.

[0077] By calculating the load drop rate of the current output load relative to the first preset output load, the load drop degree can be judged. When the load drop rate is greater than the preset proportion, the load drop degree is greater, and it is determined that the gas water heater is in an under-pressure state. Otherwise, it is determined that the gas water heater is normal.

[0078] The formula for calculating the load drop rate D2 of the current output load relative to the first preset output load is:

[0079] D2 = (Q-Q1) / Q

[0080] wherein Q1 is the current output load, and Q is the first preset output load.

[0081] Optionally, the preset ratio is 18%-22%.

[0082] In an optional embodiment, the gas water heater under-voltage identification further comprises: when it is determined that the gas water heater is in an under-voltage state, entering an under-voltage adjustment strategy.

[0083] In order to clearly illustrate the gas water heater under-voltage identification method provided by the embodiments of the present application, the following examples and Figure 6 are used to illustrate the gas water heater under-voltage identification method, as shown in the drawings. Figure 6 The gas water heater under-voltage identification method comprises:

[0084] S601, the water heater is working.

[0085] S602, the main controller calculates the current output load Q1 corresponding to the control current I according to T2, T1 and L.

[0086] T2, T1 and L are the outlet water temperature, the inlet water temperature and the water flow, respectively.

[0087] S603, the main controller detects the current rotation speed and the preset fan rotation speed and determines whether there is fan blockage.

[0088] If not, S604-S605 are executed; if yes, S606 is executed. The preset fan rotation speed is the fan rotation speed corresponding to the control current of the gas proportional valve.

[0089] S604, the current output load Q1 corresponding to the control current I is compared with the first preset output load Q corresponding to the control current I.

[0090] S605, it is determined whether (Q-Q1) / Q≥A.

[0091] When (Q-Q1) / Q≥A, it is determined that the water heater is in an under-voltage state, and S608 is executed.

[0092] When (Q-Q1) / Q<A, it is determined that the water heater is not in an under-voltage state, and S601 is returned.

[0093] S606, the main controller obtains the second preset output load Q2 under the control current I when the fan is not blocked, and calculates the drop ratio (Q-Q2) / Q of the second preset output load Q2 relative to the first preset output load Q corresponding to the control current I.

[0094] S607, determining whether (Q-Q1) / Q-(Q-Q2) / Q≥A is true.

[0095] If yes, it is determined that the water heater is in an under-pressure state, S608 is executed, and if no, it is determined that the water heater is not in the under-pressure state, and the execution returns to S601.

[0096] S608, entering an under-pressure adjustment strategy.

[0097] Corresponding to the under-pressure identification method of the gas water heater, the application further provides a gas water heater. The combustion mode of the combustion chamber of the gas water heater is positive pressure combustion. The gas water heater comprises a main controller. The main controller is used to implement any one of the under-pressure identification methods of the gas water heater. Figure 7 A structural schematic diagram of a main controller provided for an embodiment of the application is shown in FIG. 1. Figure 7 As shown in the figure, the main controller comprises:

[0098] The main controller of the gas water heater, the main controller comprises:

[0099] A detection module 100 is configured to acquire a current output load of the gas water heater, a control current of a gas proportional valve, and a current rotating speed of a fan in real time.

[0100] A blockage determination module 200 is configured to determine whether the fan is blocked according to a preset rotating speed of the fan corresponding to the control current and the current rotating speed.

[0101] A first under-pressure determination module 300 is configured to acquire a first preset output load and a second preset output load corresponding to the control current when the fan is blocked, and determine whether the gas water heater is in an under-pressure state based on the current output load, the first preset output load, and the second preset output load.

[0102] The first preset output load is an output load of the gas water heater under a standard gas pressure when the fan is not blocked.

[0103] The second preset output load is an output load of the gas water heater under the standard gas pressure when the fan is blocked.

[0104] Optionally, the main controller is further configured to:

[0105] acquire a current water outlet temperature, a current water inlet temperature, and a current water flow rate of the gas water heater in real time;

[0106] calculate the current output load based on the current water outlet temperature, the current water inlet temperature, and the current water flow rate.

[0107] Optionally, the first under-pressure determination module 300 is configured to:

[0108] determine a first influence degree of the fan blockage on the output load based on the second preset output load and the first preset output load;

[0109] determine a total influence degree of the fan blockage and the gas water heater under-voltage on the output load based on the current output load and the first preset output load;

[0110] determine a second influence degree of the gas water heater under-voltage on the output load according to the total influence degree and the first influence degree;

[0111] determine that the gas water heater is in an under-voltage state when the second influence degree reaches a preset degree.

[0112] Optionally, the first influence degree is a load drop ratio of the second preset output load relative to the first preset output load, the total influence degree is a load drop ratio of the current output load relative to the first preset output load, the second influence degree is a load drop ratio difference between the total influence degree and the first influence degree, and the preset degree is a preset ratio, which is used to represent the load drop ratio caused by the under-voltage.

[0113] Optionally, the second preset output load is determined in the following manner:

[0114] obtain a relationship curve between the fan rotating speed and the output load when the fan is blocked;

[0115] determine the output load corresponding to the current rotating speed from the relationship curve as the second preset output load.

[0116] Optionally, the main controller further comprises:

[0117] a second under-voltage judgment module, configured to determine whether the gas water heater is in an under-voltage state according to the first preset output load and the current output load when the fan is not blocked.

[0118] Optionally, the second under-voltage judgment module is configured to:

[0119] determine a load drop ratio based on the current output load and the first preset output load;

[0120] determine that the gas water heater is in an under-voltage state if the load drop ratio is greater than a preset ratio, and the preset ratio is used to represent the load drop ratio caused by the under-voltage.

[0121] The main controller of the gas water heater provided in the embodiments of the present application can execute the gas water heater under-voltage identification method provided in any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0122] Figure 8 A structural diagram of an electronic device 40 that can be used to implement embodiments of the present application is shown. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, etc. The components shown here, their connections and relationships, and their functions, are meant to be examples only, and are not intended to limit implementations of the present application described and / or claimed in this document.

[0123] As shown in Figure 8 The electronic device 40 includes at least one processor 41, and memory, such as read-only memory (ROM) 42, random access memory (RAM) 43, etc., communicatively connected to the at least one processor 41, where the memory stores computer programs executable by the at least one processor. The processor 41 can perform various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 42 or loaded into the random access memory (RAM) 43 from the storage unit 48. Various programs and data required for the operation of the electronic device 40 can also be stored in the RAM 43. The processor 41, the ROM 42, and the RAM 43 are connected to each other through a bus 44. An input / output (I / O) interface 45 is also connected to the bus 44.

[0124] Various components in the electronic device 40 are connected to the I / O interface 45, including an input unit 46, such as a keyboard, a mouse, etc., an output unit 47, such as various types of displays, speakers, etc., a storage unit 48, such as a magnetic disk, an optical disk, etc., and a communication unit 49, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 49 allows the electronic device 40 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0125] The processor 41 can be various general and / or special purpose processing components with processing and computing capabilities. Some examples of the processor 41 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 41 performs various methods and processes described above, such as the gas water heater under-pressure identification method.

[0126] In some embodiments, the gas water heater under-voltage identification method can be implemented as a computer program tangibly embodied in a computer readable storage medium, e.g., storage unit 48. In some embodiments, parts or all of the computer program can be loaded and / or installed onto electronic device 40 via, e.g., ROM 42 and / or communication unit 49. When the computer program is loaded onto RAM 43 and executed by processor 41, one or more steps of the gas water heater under-voltage identification method described above can be performed. Alternatively, in other embodiments, processor 41 can be configured to perform the gas water heater under-voltage identification method by other means, e.g., with the aid of firmware.

[0127] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a complex programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0128] Computer programs used to implement the methods of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed by the processor, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as part of a standalone software package, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0129] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0130] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and an input device (e.g., a keyboard, a mouse, a trackball, a microphone, a touch screen, or any combination thereof) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0131] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0132] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0133] It should be understood that the various forms of flow shown above can be reordered, added to, or have steps deleted. For example, the steps described in the present application can be performed in parallel, in series, or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, and this is not limited herein.

[0134] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for identifying undervoltage in a gas water heater, characterized in that, The gas water heater uses positive pressure combustion, and the method includes: Real-time acquisition of the current output load of the gas water heater, the control current of the gas proportional valve, and the current speed of the fan; Determine whether the fan is blocked based on the preset fan speed corresponding to the control current and the current speed; When the fan is blocked, the first preset output load and the second preset output load corresponding to the control current are obtained, and the gas water heater is determined to be in an undervoltage state based on the current output load, the first preset output load and the second preset output load. Wherein, the first preset output load is the output load of the gas water heater under standard gas pressure when the fan is not blocked; The second preset output load is the output load of the gas water heater under standard gas pressure when the fan is blocked.

2. The method as described in claim 1, characterized in that, Also includes: Real-time monitoring of the gas water heater's current outlet water temperature, inlet water temperature, and water flow rate; The current output load is calculated based on the current outlet water temperature, the inlet water temperature, and the water flow rate.

3. The method as described in claim 1, characterized in that, The step of determining whether the gas water heater is in an undervoltage state based on the current output load, the first preset output load, and the second preset output load includes: Based on the second preset output load and the first preset output load, determine the first degree of impact of fan blockage on the output load; Based on the current output load and the first preset output load, determine the total impact of fan blockage and gas water heater undervoltage on the output load; Based on the total impact level and the first impact level, determine the second impact level of the gas water heater undervoltage on the output load; When the second level of influence reaches a preset level, it is determined that the gas water heater is in an undervoltage state.

4. The method as described in claim 3, characterized in that, The first degree of impact is the percentage decrease in the second preset output load relative to the first preset output load, and the total degree of impact is the percentage decrease in the current output load relative to the first preset output load. The second degree of impact is the difference between the total degree of impact and the load reduction ratio of the first degree of impact. The preset degree is a preset ratio, which is used to characterize the load reduction ratio caused by undervoltage.

5. The method as described in claim 1, characterized in that, The second preset output load is determined as follows: Obtain the curve showing the relationship between fan speed and output load when the fan is blocked; The output load corresponding to the current rotational speed is determined from the relationship curve table and used as the second preset output load.

6. The method as described in claim 1, characterized in that, Also includes: When the fan is not blocked, determine whether the gas water heater is in an undervoltage state based on the first preset output load and the current output load.

7. The method as described in claim 6, characterized in that, The step of determining whether the gas water heater is in an undervoltage state based on the first preset output load and the current output load includes: The load reduction ratio is determined based on the current output load and the first preset output load; If the load drop ratio is greater than the preset ratio, the gas water heater is determined to be in an undervoltage state. The preset ratio is used to characterize the load drop ratio caused by the undervoltage.

8. A gas water heater, characterized in that, The gas water heater uses positive pressure combustion. The gas water heater includes a main controller, which includes: The detection module is used to acquire the current output load of the gas water heater, the control current of the gas proportional valve, and the current speed of the fan in real time. The blockage detection module is used to determine whether the fan is blocked based on the preset fan speed corresponding to the control current and the current speed. The first undervoltage judgment module is used to obtain the first preset output load and the second preset output load corresponding to the control current when the fan is blocked, and to determine whether the gas water heater is in an undervoltage state based on the current output load, the first preset output load and the second preset output load. Wherein, the first preset output load is the output load of the gas water heater under standard gas pressure when the fan is not blocked; The second preset output load is the output load of the gas water heater under standard gas pressure when the fan is blocked.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the gas water heater undervoltage identification method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that cause a processor to execute the undervoltage identification method for a gas water heater as described in any one of claims 1-7.

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