A gas water heater control method and device and a gas water heater

Abstract

The present application relates to the technical field of water heater control, and discloses a gas water heater control method and device and a gas water heater, the method comprising: obtaining a current gas proportional valve section of the gas water heater; determining a corresponding target load current mapping based on the current gas proportional valve section, wherein the target load current mapping is used to represent the corresponding relationship between the load and the corresponding standard ion current value under the current gas proportional valve section state; obtaining the current load and the current flame ion current value of the gas water heater in real time; determining the standard ion current interval corresponding to the current load based on the current load and the target load current mapping; and controlling the gas water heater based on the current flame ion current value and the standard ion current interval. Thus, based on the current gas proportional valve section and the current load, the standard flame ion current interval corresponding to the current load is determined, so that the gas water heater is controlled more accurately based on the standard ion current interval.

Description

Technical Field

[0001] This invention relates to the field of water heater control technology, specifically to a gas water heater control method, device, and gas water heater. Background Technology

[0002] Gas water heaters are widely used, and flame ion current sensing and detection is one of the key processes in the use of gas water heaters. The accuracy of flame ion current sensing and detection plays a vital role in the safety and reliability of combustion equipment such as gas water heaters.

[0003] In related technologies, the current flame ion current is detected in real time, and the flame state is determined by comparing the current flame ion current value with a set current threshold, which then controls the fan of the gas water heater. However, existing control logic is prone to control deviations, which can adversely affect the combustion of the flame. Summary of the Invention

[0004] In view of this, the present invention provides a gas water heater control method, device and gas water heater, which determines the standard flame ion current range corresponding to the current load based on the current gas proportional valve segment and the current load, thereby enabling more precise control of the gas water heater based on this standard ion current range.

[0005] In a first aspect, the present invention provides a method for controlling a gas water heater, the method comprising: Obtain the current gas proportional valve segment of the gas water heater; Based on the current gas proportional valve segmentation, the corresponding target load current mapping is determined. The target load current mapping is used to characterize the correspondence between the load and the corresponding standard ion current value under the current gas proportional valve segmentation state. Real-time acquisition of the current load and current flame ion current value of the gas water heater; Based on the mapping between the current load and the target load current, determine the standard ion current range corresponding to the current load; The gas water heater is controlled based on the current flame ion current value and the standard ion current range.

[0006] The gas water heater control method of the present invention determines the standard flame ion current range corresponding to the current load based on the current gas proportional valve segment and the current load, thereby enabling more precise control of the gas water heater based on this standard ion current range.

[0007] In some optional implementations, the target load current is mapped as a correspondence between multiple target load points and corresponding standard ion current values ​​under the current gas proportional valve segmentation state; based on the mapping between the current load and the target load current, the standard ion current range corresponding to the current load is determined, including: Based on the comparison between the current load and the target load point, determine the first target load point and the second target load point adjacent to the current load; Based on the first target load point and the second target load point, the corresponding standard ion current range is determined.

[0008] In some alternative implementations, the standard ion current range is determined by the following method: A standard ion current is determined based on the first target load point and the second target load point; wherein the standard ion current is located between the standard ion current value corresponding to the first target load point and the standard ion current value corresponding to the second target load point. Determine the deviation value based on the current gas proportional valve segmentation; the higher the gas proportional valve segmentation, the greater the deviation value. The standard ion current range is obtained based on the standard ion current and the deviation value.

[0009] In some alternative implementations, the gas water heater is controlled based on the current flame ion current value and a standard ion current range, including: When the difference between the current flame ion current value and the standard ion current value is less than the set deviation threshold, maintain the current fan speed; When the current flame ion current value is greater than the standard ion current value, and the difference between the current flame ion current value and the standard ion current value is greater than the set deviation threshold, the fan speed of the gas water heater is reduced at each first set time interval to reduce the current fan speed. When the current flame ion current value is less than the standard ion current value, and the difference between the current flame ion current value and the standard ion current value is greater than the set deviation threshold, the fan speed of the gas water heater is increased at each first set time interval to increase the current fan speed.

[0010] In some alternative implementations, after increasing the current fan speed, controlling the gas water heater based on the current load and target load current mapping further includes: At every second set time interval, obtain the current speed of the fan; Obtain the blockage protection speed corresponding to the current load of the gas water heater; When the current speed is greater than the blockage protection speed, an alert is issued to indicate that the gas water heater has experienced a duct blockage fault.

[0011] In some alternative implementations, the method further includes: After the gas water heater is ignited, obtain the current load of the gas water heater; If the current load is the preset maximum load of the gas water heater, then control the gas water heater to operate according to the first preset control logic; If the current load is the preset minimum load of the gas water heater, then control the gas water heater to operate according to the second preset control logic; Among them, when the gas water heater is running with the first preset control logic, the first fan current corresponding to the preset maximum load is greater than the first preset current corresponding to the preset maximum load when the gas water heater is running with the default control logic. When the gas water heater is running with the second preset control logic, the second fan current corresponding to the preset minimum load is less than the second preset current corresponding to the preset minimum load when the gas water heater is running with the default control logic.

[0012] In some alternative implementations, after controlling the gas water heater to operate according to a first preset control logic, the method further includes: When the gas water heater operates under the first preset control logic for a first duration reaches the first preset time, the gas water heater is restored to operation under the default control logic.

[0013] In some alternative implementations, after controlling the gas water heater to operate according to a second preset control logic, the method further includes: When the second preset time is reached when the gas water heater operates with the second preset control logic for a second duration, the gas water heater is controlled to operate with the default control logic.

[0014] In a second aspect, the present invention provides a gas water heater control device, the device comprising: The first acquisition module is used to acquire the current gas proportional valve segment of the gas water heater; The mapping module is used to determine the corresponding target load current mapping based on the current gas proportional valve segmentation. The target load current mapping is used to characterize the correspondence between the load and the corresponding standard ion current value under the current gas proportional valve segmentation state. The second acquisition module is used to acquire the current load and current flame ion current value of the gas water heater in real time. The calibration module is used to determine the standard ion current range corresponding to the current load based on the mapping between the current load and the target load current. The control module is used to control the gas water heater based on the current flame ion current value and the standard ion current range.

[0015] Thirdly, the present invention provides a gas water heater, comprising: a controller; The controller includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes the computer instructions to perform the gas water heater control method of the first aspect or any corresponding embodiment described above. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating a gas water heater control method according to an embodiment of the present invention; Figure 2 and Figure 3 This is a mapping of the load current under the segmented state of the two gas proportional valves actually measured in this invention. Figure 4 This is a flowchart illustrating another gas water heater control method according to an embodiment of the present invention; Figure 5 This is a flowchart illustrating another gas water heater control method according to an embodiment of the present invention; Figure 6 This is a structural block diagram of a gas water heater control device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the hardware structure of the controller of the gas water heater according to an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a gas water heater control method, device, and gas water heater, which determines the standard flame ion current range corresponding to the current load based on the current gas proportional valve segment and the current load, thereby enabling more precise control of the gas water heater based on this standard ion current range.

[0020] According to an embodiment of the present invention, a gas water heater control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0021] This embodiment provides a gas water heater control method, which can be used for gas water heaters. Figure 1 This is a flowchart of a gas water heater control method according to an embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps: Step S101: Obtain the current gas proportional valve segment of the gas water heater.

[0022] In some alternative implementations, the controller of the gas water heater can acquire control signals for the proportional valve of the gas water heater, and use these control signals to determine the current gas proportional valve segment of the gas water heater. Alternatively, the current gas proportional valve segment of the gas water heater can be determined by collecting the gas pressure in the gas circuit.

[0023] Step S102: Based on the current gas proportional valve segmentation, determine the corresponding target load current mapping, wherein the target load current mapping is used to characterize the correspondence between the load and the corresponding standard ion current value under the current gas proportional valve segmentation state.

[0024] In some optional implementations, the correspondence between the load of the gas water heater and the corresponding standard ion current value can be measured based on different gas proportional valve segments of the gas water heater under set gas proportional valve segment states. These correspondences are referred to as load current mappings, with different gas proportional valve segment states corresponding to different load current mappings. Load current mappings can be stored and displayed in any suitable manner, such as tables or diagrams. When calibrating the load current mapping, a set number of standard load points can be selected according to actual needs, and the corresponding standard ion current values ​​for these standard load points can be measured.

[0025] For example, Figure 2 and Figure 3 This is a mapping of the load current under the segmented states of two gas proportional valves, as measured in practice. The horizontal axis, "1-10," represents 10 standard load points within the load segments of the gas proportional valves, dividing the load segment of the gas water heater into multiple load intervals. The vertical axis represents the standard ion current values ​​corresponding to the measured standard load points.

[0026] Step S103: Obtain the current load and current flame ion current value of the gas water heater in real time.

[0027] In some alternative implementations, data such as water flow rate obtained from a flow sensor and inlet / outlet water temperature difference obtained from a temperature sensor can be acquired first. Then, based on the water flow rate and inlet / outlet water temperature difference, the current load of the gas water heater can be calculated in real time. Alternatively, the load can be calculated after measuring data such as gas flow rate.

[0028] In some alternative implementations, the current flame ion current value can be directly acquired through an ion current sensing circuit.

[0029] In addition, other suitable methods can be used to obtain the current load and current flame ion current value of the gas water heater, and the present invention does not limit this.

[0030] Step S104: Based on the mapping between the current load and the target load current, determine the standard ion current range corresponding to the current load.

[0031] After obtaining the current load, based on the multiple standard load points marked in step S102, it can be determined between which two load points the current load falls, and the target ion current values ​​corresponding to these two load points in the target load current mapping can be determined. Therefore, the interval formed by these two target ion currents can be used as the standard ion current interval corresponding to the current load.

[0032] Step S105: Control the gas water heater based on the current flame ion current value and the standard ion current range.

[0033] In some alternative implementations, controlling the gas water heater based on the flame ion current can be achieved by controlling the fan speed of the gas water heater. Here, the flame ion current value can be directly compared with the end value of the standard ion current range, i.e., the two target ion currents in step S104.

[0034] A standard ion current threshold can also be calculated and determined based on the endpoints of a standard ion current range. For example, the average of two standard ion currents can be taken, or a formula for determining the standard ion current can be set based on simulations of actual detection results. For instance, the difference between two standard ion current thresholds can be taken, multiplied by a pre-set coefficient, and then multiplied again by this pre-set coefficient before adding a set value or the lower limit of the standard ion current range. Furthermore, other suitable methods can be used to determine a standard ion current threshold. If the current flame ion current is smaller than the standard ion current threshold, or smaller than the lower limit of the standard ion current range, it indicates that the current fan airflow is too high, and the fan speed needs to be reduced. If the current flame ion current is larger than the standard ion current threshold, or larger than the upper limit of the standard ion current range, it indicates that the current fan airflow is too low, and the fan speed needs to be increased.

[0035] Here, the quantitative judgment criteria for the judgment process of smaller and larger can be set according to actual needs, and the value of increasing or decreasing the fan speed can also be set according to actual needs.

[0036] The gas water heater control method of the present invention determines the standard flame ion current range corresponding to the current load based on the current gas proportional valve segment and the current load, thereby enabling more precise control of the gas water heater based on this standard ion current range.

[0037] This embodiment provides a gas water heater control method, which can be used for gas water heaters. Figure 4 This is a flowchart of a gas water heater control method according to another embodiment of the present invention, such as... Figure 4 As shown, the process includes the following steps: Step S401: Obtain the current gas proportional valve segment of the gas water heater.

[0038] Please refer to the above for details. Figure 1 Step S101 of the illustrated embodiment will not be described again here.

[0039] Step S402: Based on the current gas proportional valve segmentation, determine the corresponding target load current mapping, wherein the target load current mapping is used to characterize the correspondence between the load and the corresponding standard ion current value under the current gas proportional valve segmentation state.

[0040] Please refer to the above for details. Figure 1 Step S102 of the illustrated embodiment will not be described again here.

[0041] Step S403: Obtain the current load and current flame ion current value of the gas water heater in real time.

[0042] Please refer to the above for details. Figure 1 Step S103 of the illustrated embodiment will not be described again here.

[0043] Step S404: Based on the mapping between the current load and the target load current, determine the standard ion current range corresponding to the current load.

[0044] In some optional implementations, the target load current is mapped as a correspondence between multiple target load points and corresponding standard ion current values ​​under the current gas proportional valve segmentation state. Step S404 may include: Step S4041: Based on the comparison between the current load and the target load point, determine the first target load point and the second target load point adjacent to the current load.

[0045] Since the load in the target load current mapping consists of multiple discrete standard load points, by comparing the current load with the multiple target load points in the target load current mapping, the first target load point and the second target load point adjacent to the current load can be determined. The value of the first target load point is less than the current load, and the load of the second target load point is greater than the current load.

[0046] Step S4042: Determine the corresponding standard ion current range based on the first target load point and the second target load point.

[0047] In some alternative implementations, the standard ion current range is determined by the following method: Step a1: Determine the standard ion current based on the first target load point and the second target load point, wherein the standard ion current is located between the standard ion current value corresponding to the first target load point and the standard ion current value corresponding to the second target load point.

[0048] In some alternative implementations, the standard ion current can be determined using the following formula: Ib = (I2 - I1) * K + I1; Where Ib represents the standard ion current; I1 represents the first target ion current corresponding to the first target load point; I2 represents the second target ion current corresponding to the second target load point.

[0049] K represents a pre-defined coefficient, which can take suitable values ​​such as 0.2.

[0050] Step a2: Determine the deviation value based on the current gas proportional valve segmentation, where the higher the gas proportional valve segmentation, the greater the deviation value.

[0051] In some optional implementations, the deviation value is used to characterize the allowable deviation of the actual ion current from the standard ion current. The higher the gas proportional valve segment, the larger the standard ion current value, and the greater the possible deviation of the actual ion current from the standard ion current. Therefore, the deviation value is determined based on the current gas proportional valve segment. The deviation value for each proportional valve segment can be pre-configured in a mapping manner. When determining the deviation value corresponding to the current gas proportional valve segment, the corresponding deviation value is obtained based on the pre-configured mapping.

[0052] Step a3: Obtain the standard ion current range based on the standard ion current and the deviation value.

[0053] In some optional implementations, the standard ion current range corresponding to the current gas proportional valve segment is [Ib-Ki, Ib+Ki], where Ki represents the deviation value corresponding to the current gas proportional valve segment.

[0054] Step S405: Control the gas water heater based on the current flame ion current value and the standard ion current range.

[0055] In some alternative implementations, step S405 may include: Step S4051: When the difference between the current flame ion current value and the standard ion current value is less than the set deviation threshold, maintain the current fan speed.

[0056] In some alternative implementations, when the difference between the current flame ion current value and the standard ion current value is less than a set deviation threshold, it indicates that the gas water heater is currently burning completely and the oxygen content is appropriate. There is no need to increase or decrease the air volume; simply maintaining the current fan speed is sufficient.

[0057] In step S4052, when the current flame ion current value is greater than the standard ion current value and the difference between the current flame ion current value and the standard ion current value is greater than the set deviation threshold, the fan speed of the gas water heater is reduced at each first set time interval to reduce the current fan speed.

[0058] In some optional implementations, when the current flame ion current value is greater than the standard ion current value, and the difference between the current flame ion current value and the standard ion current value is greater than a set deviation threshold, it indicates that the gas water heater is currently in an oxygen-rich combustion state, and the airflow needs to be reduced to decrease the amount of air entering the gas water heater. This is achieved by lowering the fan speed of the gas water heater, thereby reducing the airflow and the amount of air entering the water heater.

[0059] Furthermore, to avoid sudden changes in airflow or over-adjustment caused by drastic fan speed adjustments, and to minimize the possibility that the flame ion current value after adjustment will be significantly lower than the standard ion current value or affect the combustion state of the gas water heater, the fan speed is adjusted incrementally at set intervals. After the gas water heater has been burning stably for a set time, the data from a subsequent test is used to determine whether the fan speed needs to be adjusted again. This allows for step-by-step adjustment of the fan speed.

[0060] In some alternative implementations, the first set time may be 0.5 seconds or other suitable time.

[0061] In step S4053, when the current flame ion current value is less than the standard ion current value and the difference between the current flame ion current value and the standard ion current value is greater than the set deviation threshold, the fan speed of the gas water heater is increased at each first set time interval to increase the current fan speed.

[0062] When the current flame ion current value is lower than the standard ion current value, and the difference between the current flame ion current value and the standard ion current value is greater than the set deviation threshold, it indicates that the gas water heater is in an oxygen-deficient combustion state. Therefore, it is necessary to increase the airflow to increase the air intake of the gas water heater. This is achieved by increasing the fan speed of the gas water heater, thereby increasing the airflow and the air intake.

[0063] Furthermore, to avoid sudden changes in airflow or over-adjustment caused by drastic fan speed adjustments, and to minimize the possibility that the adjusted flame ion current value will be significantly higher than the standard ion current value or affect the combustion state of the gas water heater, the fan speed is adjusted incrementally at set intervals. After the gas water heater has been burning stably for a set time, the data from a subsequent test is used to determine whether the fan speed needs to be adjusted again. This allows for step-by-step adjustment of the fan speed.

[0064] In some alternative implementations, after increasing the current fan speed based on step S4052, step S405 further includes: Step S4054: At every second set time interval, obtain the current speed of the fan.

[0065] In some alternative implementations, the fan speed can be obtained directly from a speed sensor.

[0066] Step S4055: Obtain the blockage protection speed corresponding to the current load of the gas water heater.

[0067] In some optional implementations, the gas water heater can be pre-configured with multiple loads and corresponding blockage protection speeds. After obtaining the current load, the blockage protection speed corresponding to the current load is obtained through methods such as table lookup. Generally, the larger the load, the higher the corresponding blockage protection speed.

[0068] Step S4056: When the current rotation speed is greater than the blockage protection speed, issue a reminder to indicate that the gas water heater has experienced a duct blockage fault.

[0069] In some alternative implementations, when the current rotation speed is greater than the blockage protection rotation speed determined in step S4055, the gas water heater may be blocked, and an alert can be issued to indicate that the gas water heater has experienced a duct blockage fault.

[0070] For example, a blockage fault code "32" can be issued to indicate a blockage fault in the air duct of a gas water heater.

[0071] This embodiment provides a gas water heater control method, which can be used for gas water heaters. Figure 5 This is a flowchart of a gas water heater control method according to another embodiment of the present invention, as follows: Figure 5 As shown, the process includes the following steps: Step S501: After the gas water heater is ignited, obtain the current load of the gas water heater.

[0072] The current load is obtained as described above. Figure 1 Step S103 of the illustrated embodiment will not be described again here.

[0073] Step S502: If the current load is the preset maximum load of the gas water heater, then control the gas water heater to operate with the first preset control logic. When the gas water heater operates with the first preset control logic, the first fan current corresponding to the preset maximum load is greater than the first preset current corresponding to the preset maximum load when the gas water heater operates with the default control logic.

[0074] In some optional implementations, when the current load is the preset maximum load of the gas water heater, to avoid the problem of low fan speed during cold start, leading to a mismatch between the air intake and the gas proportional valve segments of the gas water heater, and thus causing resonance, a first preset control logic is adopted. When the gas water heater operates with the first preset control logic, the first fan current corresponding to the preset maximum load is greater than the first preset current corresponding to the preset maximum load when the gas water heater operates with the default control logic. Specifically, the first preset current corresponding to the preset maximum load when the gas water heater operates with the default control logic can be increased by 20 current levels, which is used as the first fan current corresponding to the preset maximum load when the gas water heater operates with the first preset control logic. Therefore, when the current load is the preset maximum load of the gas water heater, the fan airflow is effectively increased, ensuring that the air intake matches the gas proportional valve segments of the gas water heater, thereby effectively preventing resonance of the gas water heater fan.

[0075] Step S503: When the first duration of the gas water heater operating with the first preset control logic reaches the first preset time, the gas water heater is restored to operation with the default control logic.

[0076] In some alternative implementations, the first preset time may be 90 seconds or other suitable durations.

[0077] The purpose of operating with the first preset control logic is primarily to avoid the problem of fan resonance when the fan speed is low in a cold state during startup, but the current load is the preset maximum load of the gas water heater. This problem is overcome after operating with the first preset control logic for a first preset duration. To effectively reduce noise and energy consumption caused by continuous high-speed, high-volume fan operation, the gas water heater will revert to operation with the default control logic once the first preset duration of operation with the first preset control logic is reached.

[0078] Step S504: If the current load is the preset minimum load of the gas water heater, then control the gas water heater to operate with the second preset control logic. When the gas water heater operates with the second preset control logic, the second fan current corresponding to the preset minimum load is less than the second preset current corresponding to the preset minimum load when the gas water heater operates with the default control logic.

[0079] In some optional implementations, when the current load is the preset minimum load of the gas water heater, the gas source may be detached from the flame or the gas pressure may be low, resulting in a minimum gas input to the gas water heater. This could lead to partial flame extinguishing, affecting subsequent flame ion current detection. Therefore, when the current load is the preset minimum load of the gas water heater, the gas water heater is controlled to operate with a second preset control logic to reduce the air intake and stabilize the flame state. Consequently, the first fan current corresponding to the preset minimum load when the gas water heater operates with the first preset control logic is greater than the first preset current corresponding to the preset minimum load when the gas water heater operates with the default control logic. Specifically, the current value corresponding to the first preset current of the preset minimum load when the gas water heater operates with the default control logic can be reduced by 8 current levels and used as the second fan current corresponding to the preset minimum load when the gas water heater operates with the second preset control logic.

[0080] Step S505: When the second duration of the gas water heater operating with the second preset control logic reaches the second preset time, control the gas water heater to operate with the default control logic.

[0081] In some alternative implementations, the second preset time may also be 90 seconds or other suitable durations.

[0082] The purpose of operating with the second preset control logic is primarily to avoid the problem of partial flame extinguishing when the gas source is in a state of flame exhaustion or low gas pressure, resulting in a minimum gas input to the gas water heater, especially when the current load is the preset minimum load. This problem is overcome after operating with the first preset control logic for a first preset duration. To effectively reduce the problem of insufficient air intake leading to incomplete combustion caused by the continuous fan operating at a low speed and small airflow, the gas water heater will revert to operation with the default control logic after the first preset duration of operation with the first preset control logic has elapsed.

[0083] The "default control logic" described in steps S503 and S505 above is the aforementioned... Figure 1 and Figure 4 The illustrated embodiment describes the method of controlling the gas water heater. Here, step S506 can be performed.

[0084] If the current load is neither the preset maximum load nor the preset minimum load, then the default control logic is executed directly, that is, step S506 is executed directly.

[0085] Step S506: Obtain the current gas proportional valve segment of the gas water heater.

[0086] Please refer to the above for details. Figure 1 Step S101 of the illustrated embodiment will not be described again here.

[0087] Step S507: Based on the current gas proportional valve segmentation, determine the corresponding target load current mapping, wherein the target load current mapping is used to characterize the correspondence between the load and the corresponding standard ion current value under the current gas proportional valve segmentation state.

[0088] Please refer to the above for details. Figure 1 Step S102 of the illustrated embodiment will not be described again here.

[0089] Step S508: Obtain the current load and current flame ion current value of the gas water heater in real time.

[0090] Please refer to the above for details. Figure 1 Step S103 of the illustrated embodiment will not be described again here.

[0091] Step S509: Based on the mapping between the current load and the target load current, determine the standard ion current range corresponding to the current load.

[0092] Please refer to the above for details. Figure 1 Step S104 and the embodiment shown Figure 4 Step S404 of the illustrated embodiment will not be described again here.

[0093] Step S510: Control the gas water heater based on the current flame ion current value and the standard ion current range.

[0094] Please refer to the above for details. Figure 1 Step S105 and the embodiment shown Figure 4 Step S405 of the illustrated embodiment will not be described again here.

[0095] This embodiment also provides a gas water heater control device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0096] This embodiment provides a gas water heater control device, such as... Figure 6 As shown, it includes: The first acquisition module 601 is used to acquire the current gas proportional valve segment of the gas water heater; The mapping module 602 is used to determine the corresponding target load current mapping based on the current gas proportional valve segmentation, wherein the target load current mapping is used to characterize the correspondence between the load and the corresponding standard ion current value under the current gas proportional valve segmentation state. The second acquisition module 603 is used to acquire the current load and current flame ion current value of the gas water heater in real time. The calibration module 604 is used to determine the standard ion current range corresponding to the current load based on the mapping between the current load and the target load current; The control module 605 is used to control the gas water heater based on the current flame ion current value and the standard ion current range.

[0097] In some optional implementations, the target load current is mapped to a correspondence between multiple target load points and corresponding standard ion current values ​​under the current gas proportional valve segmentation state; the calibration module 604 includes: The load point unit is used to determine the first target load point and the second target load point adjacent to the current load based on a comparison between the current load and the target load point. The interval unit is used to determine the corresponding standard ion current interval based on the first target load point and the second target load point.

[0098] In some alternative implementations, the standard ion current range is determined by the following method: A standard ion current is determined based on the first target load point and the second target load point; wherein the standard ion current is located between the standard ion current value corresponding to the first target load point and the standard ion current value corresponding to the second target load point. Determine the deviation value based on the current gas proportional valve segmentation; the higher the gas proportional valve segmentation, the greater the deviation value. The standard ion current range is obtained based on the standard ion current and the deviation value.

[0099] In some alternative implementations, the control module 605 includes: The first control unit is used to maintain the current fan speed when the difference between the current flame ion current value and the standard ion current value is less than a set deviation threshold. The second control unit is used to reduce the fan speed of the gas water heater at first set intervals when the current flame ion current value is greater than the standard ion current value and the difference between the current flame ion current value and the standard ion current value is greater than a set deviation threshold. The third control unit is used to increase the fan speed of the gas water heater at first set intervals when the current flame ion current value is less than the standard ion current value and the difference between the current flame ion current value and the standard ion current value is greater than the set deviation threshold.

[0100] In some alternative implementations, the control module 605 further includes: The speed acquisition unit is used to acquire the current speed of the fan at second set time intervals after increasing the current fan speed; A protection speed unit is used to obtain the blockage protection speed corresponding to the current load of the gas water heater; The reminder unit is used to issue a reminder indicating that the gas water heater has experienced a duct blockage fault when the current speed is greater than the blockage protection speed.

[0101] In some alternative embodiments, the apparatus further includes: The first logic module is used to control the gas water heater to operate with the first preset control logic when the current load and the current flame ion current value of the gas water heater are obtained in real time and the current load is the preset maximum load of the gas water heater. The second logic module is used to control the gas water heater to operate according to the second preset control logic when the current load is the preset minimum load of the gas water heater; Among them, when the gas water heater is running with the first preset control logic, the fan current of the gas water heater in the first gear is greater than the first preset current corresponding to the first gear when the gas water heater is running with the default control logic. When the gas water heater is running with the second preset control logic, the fan current at the second speed setting is less than the second preset current corresponding to the second speed setting when the gas water heater is running with the default control logic.

[0102] In some alternative embodiments, the apparatus further includes: The first recovery module is used to restore the operation of the gas water heater to the default control logic after the gas water heater has been controlled to operate according to the first preset control logic for a first preset duration.

[0103] In some alternative embodiments, the apparatus further includes: The second recovery module is used to control the gas water heater to run with the default control logic after the gas water heater has been controlled to run with the second preset control logic for a second duration that reaches the second preset time.

[0104] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0105] In this embodiment, the gas water heater control device is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0106] This invention also provides a gas water heater, including: a controller, the controller having the above-described... Figure 6 The gas water heater control device shown.

[0107] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a gas water heater controller provided in an optional embodiment of the present invention, as shown below. Figure 7 As shown, the controller of the gas water heater includes one or more processors 10, a memory 20, and interfaces for connecting the various components, including high-speed interfaces and low-speed interfaces. The various components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processor can process instructions executed within the controller of the gas water heater, including instructions stored in or on the memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some alternative embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple controllers of gas water heaters can be connected, each device providing some of the necessary operations (e.g., as a server array, a set of blade servers, or a multiprocessor system). Figure 7 Take a processor 10 as an example.

[0108] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0109] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0110] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the gas water heater's controller. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transient memory, such as at least one disk storage device, flash memory device, or other non-transient solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, which can be connected to the gas water heater's controller via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0111] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0112] The controller of the gas water heater also includes a communication interface 30 for communicating with other devices or communication networks.

[0113] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0114] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0115] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended technical solutions.

Claims

1. A method for controlling a gas water heater, characterized in that, The method includes: Obtain the current gas proportional valve segment of the gas water heater; Based on the current gas proportional valve segmentation, a corresponding target load current mapping is determined, wherein the target load current mapping is used to characterize the correspondence between the load and the corresponding standard ion current value under the current gas proportional valve segmentation state; Real-time acquisition of the current load and current flame ion current value of the gas water heater; Based on the current mapping between the current load and the target load, a standard ion current range corresponding to the current load is determined; The gas water heater is controlled based on the current flame ion current value and the standard ion current range.

2. The method according to claim 1, characterized in that, The target load current mapping is a correspondence between multiple target load points and corresponding standard ion current values ​​under the current gas proportional valve segmentation state; the step of determining the standard ion current range corresponding to the current load based on the current load and the target load current mapping includes: Based on the comparison between the current load and the target load point, a first target load point and a second target load point adjacent to the current load are determined; Based on the first target load point and the second target load point, the corresponding standard ion current range is determined.

3. The method according to claim 2, characterized in that, The standard ion current range was determined by the following method: A standard ion current is determined based on the first target load point and the second target load point; wherein the standard ion current is located between the standard ion current value corresponding to the first target load point and the standard ion current value corresponding to the second target load point. Based on the current gas proportional valve segmentation, a deviation value is determined; wherein, the higher the gas proportional valve segmentation, the larger the deviation value. The standard ion current range is obtained based on the standard ion current and the deviation value.

4. The method according to claim 1, characterized in that, The control of the gas water heater based on the current flame ion current value and the standard ion current range includes: When the difference between the current flame ion current value and the standard ion current value is less than a set deviation threshold, the current fan speed is maintained; When the current flame ion current value is greater than the standard ion current value, and the difference between the current flame ion current value and the standard ion current value is greater than the set deviation threshold, the fan speed of the gas water heater is reduced at first set time intervals to reduce the current fan speed. When the current flame ion current value is less than the standard ion current value, and the difference between the current flame ion current value and the standard ion current value is greater than the set deviation threshold, the fan speed of the gas water heater is increased at first set time intervals to increase the current fan speed.

5. The method according to claim 4, characterized in that, After increasing the current fan speed, the control of the gas water heater based on the current mapping between the current load and the target load further includes: At every second predetermined time interval, the current rotational speed of the fan is obtained; Obtain the blockage protection speed corresponding to the current load of the gas water heater; When the current rotation speed is greater than the blockage protection rotation speed, an alert is issued to indicate that the gas water heater has experienced a duct blockage fault.

6. The method according to claim 1, characterized in that, The method further includes: After the gas water heater is ignited, the current load of the gas water heater is obtained; If the current load is the preset maximum load of the gas water heater, then control the gas water heater to operate according to the first preset control logic; If the current load is the preset minimum load of the gas water heater, then control the gas water heater to operate according to the second preset control logic; Wherein, when the gas water heater is running with the first preset control logic, the first fan current corresponding to the preset maximum load is greater than the first preset current corresponding to the preset maximum load when the gas water heater is running with the default control logic. When the gas water heater is operated with the second preset control logic, the second fan current corresponding to the preset minimum load is less than the second preset current corresponding to the preset minimum load when the gas water heater is operated with the default control logic.

7. The method according to claim 6, characterized in that, After controlling the gas water heater to operate according to the first preset control logic, the method further includes: When the gas water heater operates under the first preset control logic for a first duration, the operation of the gas water heater is restored to be controlled by the default control logic.

8. The method according to claim 6, characterized in that, After controlling the gas water heater to operate according to the second preset control logic, the method further includes: When the second preset time is reached when the gas water heater operates with the second preset control logic for a second duration, the gas water heater is controlled to operate with the default control logic.

9. A control device for a gas water heater, characterized in that, The device includes: The first acquisition module is used to acquire the current gas proportional valve segment of the gas water heater; The mapping module is used to determine the corresponding target load current mapping based on the current gas proportional valve segmentation, wherein the target load current mapping is used to characterize the correspondence between the load and the corresponding standard ion current value under the current gas proportional valve segmentation state. The second acquisition module is used to acquire the current load and current flame ion current value of the gas water heater in real time. The calibration module is used to determine the standard ion current range corresponding to the current load based on the mapping between the current load and the target load current; The control module is used to control the gas water heater based on the current flame ion current value and the standard ion current range.

10. A gas-fired water heater, characterized in that, include: Controller; The controller includes a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the gas water heater control method according to any one of claims 1 to 8.

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