Water heater control method, device, computer equipment and water heater

Abstract

The present invention relates to the field of electrical equipment technology, and discloses a water heater control method, device, computer device, and water heater. The water heater control method includes: obtaining a first actual output power and a first theoretical output power of the water heater; determining whether the water heater's intake pressure is sufficient based on the first actual output power and the first theoretical output power; and reducing the water heater's cut-off power when the water heater's intake pressure is insufficient. Thus, by reducing the water heater's cut-off power when the intake pressure is insufficient, fluctuations in the water heater's output power can be reduced, thereby preventing a rapid increase in the outlet water temperature.

Description

Technical Field

[0001] The present invention relates to the field of electrical equipment, and in particular to a control method and device for a water heater, computer equipment, and a water heater. Background Art

[0002] Currently, most gas water heaters are constant-temperature models, with different stage configurations for different loads. For example, a 2-4-6 stage gas water heater can utilize two, four, or six fire rows for heating. This means the number of fire rows can vary depending on the load. However, when the water heater leaves the factory, the maximum fire load on row 2 must be greater than the minimum fire load on row 4, and the maximum fire load on row 4 must be greater than the minimum fire load on row 6 to ensure load continuity. However, current water heater outlet temperatures still experience significant fluctuations, impacting user experience. Summary of the Invention

[0003] In view of this, the present invention provides a control method and device for a water heater, a computer device, and a water heater, so as to solve the problem that the outlet water temperature of the water heater still fluctuates greatly.

[0004] In a first aspect, an embodiment of the present invention provides a method for controlling a water heater, the method comprising the following steps: obtaining a first actual output power and a first theoretical output power of the water heater; determining whether the air intake pressure of the water heater is sufficient based on the first actual output power and the first theoretical output power; and when the air intake pressure of the water heater is insufficient, reducing the exhaust power of the water heater.

[0005] The control method for the water heater provided in this embodiment can identify the situation of insufficient intake pressure through the first actual output power and the first theoretical output power of the water heater. Further, when the intake pressure is insufficient, the fluctuation of the water heater output power can be reduced by reducing the cut-off power of the water heater, thereby preventing the outlet water temperature from rising rapidly.

[0006] In an optional embodiment, determining whether the air intake pressure of the water heater is sufficient based on the first actual output power and the first theoretical output power includes: determining whether the actual output power of the water heater is stable within a preset time period based on multiple first actual output powers obtained by the water heater within the time period; determining whether the theoretical output power of the water heater gradually increases within the time period based on multiple first theoretical output powers obtained by the water heater within the time period; when the actual output power of the water heater is output steadily within the time period and the theoretical output power of the water heater gradually increases within the time period, it is determined that the air intake pressure of the water heater is insufficient.

[0007] This can eliminate the influence of errors and accidental factors, so that insufficient intake pressure can be identified more accurately.

[0008] In an optional embodiment, determining whether the actual output power of the water heater is stable within a preset time period based on multiple first actual output powers obtained by the water heater within the time period includes: determining a first slope of the actual output power of the water heater within the time period based on the multiple first actual output powers; when the first slope belongs to a preset first range, determining that the actual output power of the water heater is stable within the time period; and / or, determining whether the theoretical output power of the water heater gradually increases within the time period based on multiple first theoretical output powers obtained by the water heater within the time period includes: determining a second slope of the theoretical output power of the water heater within the time period based on the multiple first theoretical output powers; when the second slope belongs to a preset second range, determining that the theoretical output power of the water heater gradually increases within the time period.

[0009] In this way, it is possible to simply and conveniently determine whether the actual output power is stable within a time period and / or whether the theoretical output power is gradually increasing within a time period.

[0010] In an optional embodiment, determining whether the intake pressure of the water heater is sufficient based on the first actual output power and the first theoretical output power includes: calculating the difference between the first actual output power and the first theoretical output power; when the difference is greater than a preset first threshold, determining that the intake pressure of the water heater is insufficient.

[0011] This makes it possible to simply and directly identify insufficient intake air pressure.

[0012] In an optional embodiment, the control method of the water heater also includes the following steps: obtaining the actual temperature of the water in the water heater; obtaining the set temperature of the water heater; when the actual temperature is lower than the set temperature, executing the step of obtaining the first actual output power and the first theoretical output power of the water heater.

[0013] Therefore, only when the actual temperature is lower than the set temperature will it be determined whether the water heater's intake pressure is sufficient. When the intake pressure is insufficient, the water heater's discharge power is reduced, thereby reducing the amount of calculation of the computer equipment and reducing power consumption.

[0014] In an optional embodiment, when the air inlet pressure of the water heater is insufficient, reducing the water heater's cut-off power includes: obtaining a second theoretical output power of the water heater when the air inlet pressure is insufficient; and obtaining an adjusted cut-off power of the water heater based on the second theoretical output power.

[0015] In this way, the adjusted cutting power can be made closer to the actual output power of the water heater before the number of fire gates is adjusted, and will not cause fluctuations in water temperature.

[0016] In an optional implementation, obtaining the adjusted cut-off power of the water heater according to the second theoretical output power includes: using the second theoretical output power as the adjusted cut-off power of the water heater.

[0017] Therefore, when insufficient air intake pressure is quickly identified, the adjusted cut-off power can be made closer to the actual output power of the water heater before the number of fire gates is adjusted, without causing fluctuations in water temperature.

[0018] In an optional embodiment, obtaining the adjusted cut-off power of the water heater according to the second theoretical output power includes: obtaining the second actual output power of the water heater; obtaining a power adjustment value according to the second actual output power and the second theoretical output power; and obtaining the adjusted cut-off power of the water heater using the second theoretical output power and the power adjustment value.

[0019] Therefore, when it takes some time to identify insufficient air intake pressure, the adjusted cutting power is close to the actual output power of the water heater before the number of fire gates is adjusted, which will not cause fluctuations in water temperature.

[0020] In an optional embodiment, obtaining the power adjustment value according to the second actual output power and the second theoretical output power includes: obtaining a preset adjustment coefficient; and obtaining the power adjustment value according to the adjustment coefficient, the second actual output power and the second theoretical output power.

[0021] In this way, the power adjustment value can be accurately determined.

[0022] In an optional embodiment, obtaining the first theoretical output power of the water heater includes: obtaining a first parameter for characterizing the opening of the proportional valve; determining the first theoretical output power of the water heater based on the first parameter; or, obtaining the second theoretical output power of the water heater at the moment when the intake pressure is insufficient includes: obtaining a second parameter for characterizing the opening of the proportional valve of the water heater; determining the second theoretical output power of the water heater based on the second parameter.

[0023] In this way, the theoretical output power of the water heater can be obtained more accurately.

[0024] In an optional embodiment, obtaining the first actual output power of the water heater includes: obtaining a third parameter for characterizing the amount of water in the water heater; obtaining the actual temperature of the water in the water heater; and determining the first actual output power of the water heater based on the third parameter and the actual temperature of the water in the water heater; or, obtaining the second actual output power of the water heater includes: obtaining a fourth parameter for characterizing the amount of water in the water heater; obtaining the actual temperature of the water in the water heater; and determining the second actual output power of the water heater based on the fourth parameter and the actual temperature of the water in the water heater.

[0025] In this way, the actual output power of the water heater can be obtained more accurately.

[0026] In the second aspect, an embodiment of the present invention also provides a control device for a water heater, the device including an acquisition module, an intake pressure judgment module and a cut-off power adjustment module; the acquisition module is used to obtain a first actual output power and a first theoretical output power of the water heater; the intake pressure judgment module is used to determine whether the intake pressure of the water heater is sufficient based on the first actual output power and the first theoretical output power; when the intake pressure of the water heater is insufficient, the cut-off power adjustment module is used to reduce the cut-off power of the water heater.

[0027] In a third aspect, an embodiment of the present invention further provides a computer device, comprising a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the control method of the water heater according to the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0028] In a fourth aspect, an embodiment of the present invention further provides a water heater comprising the computer device of the third aspect.

[0029] In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the water heater control method of the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the proportional valve's segmented power when the intake pressure is sufficient;

[0032] Figure 2 This is a schematic diagram of the proportional valve's segmented power when the intake pressure is insufficient;

[0033] Figure 3 is a flow chart of a water heater control method according to an embodiment of the present invention;

[0034] Figure 4 is a flow chart of another water heater control method according to an embodiment of the present invention;

[0035] Figure 5 is a flow chart of another water heater control method according to an embodiment of the present invention;

[0036] Figure 6 is a flow chart of another water heater control method according to an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the principle of water outlet temperature fluctuation of a water heater when the inlet pressure is insufficient;

[0038] Figure 8 This is another schematic diagram of the principle of water outlet temperature fluctuation of a water heater when the inlet pressure is insufficient;

[0039] Figure 9 is a flow chart of an example of a water heater control method according to an embodiment of the invention;

[0040] Figure 10 1 is a schematic diagram showing the effect of the water heater control method according to an embodiment of the present invention;

[0041] Figure 11 is a structural block diagram of a water heater control device according to an embodiment of the present invention;

[0042] Figure 12 Schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0044] When the actual outlet water temperature of the water heater fails to reach the target outlet water temperature, the water heater output power needs to be increased. Specifically, while the number of burners remains unchanged, the proportional valve opening is increased to increase the air intake, thereby increasing the water heater output power. When the proportional valve opening reaches its maximum, i.e., the air intake reaches its maximum, if the actual outlet water temperature still fails to reach the target outlet water temperature, the water heater output power needs to be increased by adding more burners.

[0045] In related art, the control method for increasing the number of fire rows in a water heater uses the maximum fire load of the current fire row (i.e., the maximum theoretical output power of the current fire row) as the cut-off power. For example, the maximum theoretical output power of two fire rows is 10 kW, and the minimum theoretical output power of four fire rows is 8 kW. The maximum theoretical output power of two fire rows is greater than the minimum theoretical output power of four fire rows. When the number of fire rows needs to be increased from 2 to 4, the cut-off power is 10 kW, switching from two fire rows to 10 kW of four fire rows.

[0046] Under the condition of sufficient air inlet pressure and the same number of fire rows, the actual output power of the water heater will continue to increase with the increase of the proportional valve opening. When the proportional valve opening is increased to the maximum, the actual output power of the water heater will reach the maximum theoretical output power. Figure 1 As shown, under the condition of sufficient intake pressure, when the proportional valve current reaches the maximum, the actual output power of the water heater will reach the maximum theoretical output power, and the maximum fire load of 2 rows is greater than the minimum fire load of 4 rows, and the maximum fire load of 4 rows is greater than the minimum fire load of 6 rows. In other words, the maximum power P1_max of the first stage (2 rows of fire) combustion is greater than the minimum power P2_min of the second stage (4 rows of fire); the maximum power P2_max of the second stage (4 rows of fire) combustion is greater than the minimum power P3_min of the third stage (6 rows of fire). Therefore, the maximum theoretical output power of the current number of fire rows is used as the switching power. When switching the fire rows, it will not cause fluctuations in the output power of the water heater, and thus will not cause fluctuations in the outlet water temperature.

[0047] However, in the case of insufficient intake pressure, and the number of fire rows remains unchanged, the actual output power of the water heater will not continue to increase with the increase in the proportional valve opening, but will stop increasing after reaching a certain value. For example, the maximum theoretical output power of 2 fire rows is 10Kw, but due to insufficient intake pressure, the actual output power of the water heater will stop increasing after increasing to 8Kw. When the proportional valve opening is increased to the maximum value, the number of fire rows will be increased because the actual outlet water temperature still cannot reach the target outlet water temperature. If the maximum theoretical output power of the current number of fire rows, i.e. 10Kw, is still used as the cut-off power at this time, the large difference between 10Kw and 8Kw will cause fluctuations in the output power of the water heater, and thus the outlet water temperature will not rise rapidly. Figure 2 As shown, when the intake pressure is insufficient, when the proportional valve current reaches the maximum, the actual output power of the water heater will not reach the maximum theoretical output power, that is, P_real<P2_max; but when the proportional valve current reaches the maximum, the theoretical output power of the water heater will reach the maximum theoretical output power, that is, P_theory=P2_max.

[0048] Based on this, an embodiment of the present invention provides an embodiment of a control method for a water heater. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0049] In this embodiment, a method for controlling a water heater is provided, which can be used in computer equipment. Figure 3 FIG. 1 is a flow chart of a water heater control method according to an embodiment of the present invention. Figure 3As shown, the process includes the following steps:

[0050] Step S301: Acquire a first actual output power and a first theoretical output power of the water heater.

[0051] In a specific embodiment, obtaining the first theoretical output power of the water heater includes: obtaining a first parameter representing a proportional valve opening; and determining the first theoretical output power of the water heater based on the first parameter. For example, the first parameter representing the proportional valve opening may be a proportional valve current.

[0052] In a specific embodiment, obtaining the first actual output power of the water heater includes: obtaining a third parameter representing the amount of water in the water heater; obtaining the actual temperature of the water in the water heater; and determining the first actual output power of the water heater based on the third parameter and the actual temperature of the water in the water heater. For example, the third parameter representing the amount of water in the water heater may be the mass of the water in the water heater, the volume of the water in the water heater, the flow rate of the water in the water heater, etc.

[0053] Step S302: determining whether the intake pressure of the water heater is sufficient according to the first actual output power and the first theoretical output power.

[0054] This is because, as can be seen from the above analysis, insufficient intake air pressure can be identified by comparing the first actual output power and the first theoretical output power of the water heater. For example, when the difference between the first actual output power and the first theoretical output power exceeds a preset threshold (e.g., the error between the first actual output power and the first theoretical output power), insufficient intake air pressure can be considered.

[0055] Step S303: When the air inlet pressure of the water heater is insufficient, the cut-off power of the water heater is reduced.

[0056] It is important to note that even if you reduce the water heater's cut-off power, you should not reduce it too much, as this must ensure successful cut-off. For example, the maximum theoretical output power of a 2-burner system is 10 kW, while the minimum theoretical output power of a 4-burner system is 8 kW. Therefore, the reduced cut-off power must be greater than 8 kW to ensure successful cut-off.

[0057] The control method for the water heater provided in this embodiment can identify the situation of insufficient intake pressure through the first actual output power and the first theoretical output power of the water heater. Further, when the intake pressure is insufficient, the fluctuation of the water heater output power can be reduced by reducing the cut-off power of the water heater, thereby preventing the outlet water temperature from rising rapidly.

[0058] In this embodiment, a method for controlling a water heater is provided, which can be used in computer equipment. Figure 4 FIG. 1 is a flow chart of another water heater control method according to an embodiment of the present invention. Figure 4 As shown, the process includes the following steps:

[0059] Step S401: Acquire a first actual output power and a first theoretical output power of the water heater.

[0060] Step S402: determining whether the intake pressure of the water heater is sufficient according to the first actual output power and the first theoretical output power.

[0061] As an optional implementation, step S402 includes: calculating the difference between the first actual output power and the first theoretical output power; when the difference is greater than a preset first threshold, determining that the air intake pressure of the water heater is insufficient.

[0062] As another optional implementation, step S402 includes:

[0063] Step S4021: determining whether the actual output power of the water heater is stable within a preset time period based on a plurality of first actual output powers obtained by the water heater within a preset time period.

[0064] Specifically, determining whether the actual output power of the water heater is stable within a preset time period based on multiple first actual output powers obtained by the water heater within a preset time period includes: determining a first slope of the actual output power of the water heater within the time period based on multiple first actual output powers; when the first slope belongs to a preset first range, determining that the actual output power of the water heater is stable within the time period.

[0065] For example, the first range may be -0.5 to 0.5.

[0066] Step S4022: determining whether the theoretical output power of the water heater gradually increases within the time period based on the multiple first theoretical output powers obtained by the water heater within the time period.

[0067] Specifically, determining whether the theoretical output power of the water heater gradually increases within the time period based on multiple first theoretical output powers obtained by the water heater within the time period includes: determining a second slope of the theoretical output power of the water heater within the time period based on the multiple first theoretical output powers; when the second slope belongs to a preset second range, determining that the theoretical output power of the water heater gradually increases within the time period.

[0068] For example, the second range may be 1 to 2.

[0069] Step S4023: When the actual output power of the water heater is output steadily within the time period and the theoretical output power of the water heater gradually increases within the time period, it is determined that the air intake pressure of the water heater is insufficient.

[0070] Compared with the above-mentioned method of "calculating the difference between the first actual output power and the first theoretical output power; when the difference is greater than the preset first threshold, determining that the intake pressure of the water heater is insufficient", the method of steps S4021 to S4023 can eliminate the influence caused by errors and accidental factors, thereby more accurately identifying the situation of insufficient intake pressure.

[0071] Step S403: When the air inlet pressure of the water heater is insufficient, the cut-off power of the water heater is reduced.

[0072] The control method for the water heater provided in this embodiment can accurately identify the situation of insufficient intake pressure through the first actual output power and the first theoretical output power of the water heater. Further, when the intake pressure is insufficient, the fluctuation of the water heater output power can be reduced by reducing the cut-off power of the water heater, thereby preventing the outlet water temperature from rising rapidly.

[0073] In this embodiment, a method for controlling a water heater is provided, which can be used in computer equipment. Figure 5 FIG. 1 is a flow chart of another water heater control method according to an embodiment of the present invention. Figure 5 As shown, the process includes the following steps:

[0074] Step S501: Acquire a first actual output power and a first theoretical output power of a water heater.

[0075] Step S502: determining whether the intake air pressure of the water heater is sufficient according to the first actual output power and the first theoretical output power.

[0076] Step S503: When the air inlet pressure of the water heater is insufficient, the cut-off power of the water heater is reduced.

[0077] Specifically, step S503 includes:

[0078] Step S5031: Obtain the second theoretical output power of the water heater when the air intake pressure is insufficient.

[0079] Specifically, obtaining the second theoretical output power of the water heater when the intake air pressure is insufficient includes: obtaining a second parameter representing the opening of a proportional valve of the water heater; and determining the second theoretical output power of the water heater based on the second parameter. For example, the second parameter representing the opening of the proportional valve may be a proportional valve current.

[0080] Step S5032: obtaining the adjusted cut-off power of the water heater according to the second theoretical output power.

[0081] In a specific embodiment, obtaining the adjusted cut-off power of the water heater based on the second theoretical output power includes using the second theoretical output power as the adjusted cut-off power of the water heater. This allows for rapid identification of insufficient intake pressure, ensuring that the adjusted cut-off power is close to the actual output power of the water heater before the number of burners is adjusted, and preventing water temperature fluctuations.

[0082] As another specific embodiment, obtaining the adjusted cut-off power of the water heater based on the second theoretical output power includes: obtaining the second actual output power of the water heater; obtaining a power adjustment value based on the second actual output power and the second theoretical output power; and obtaining the adjusted cut-off power of the water heater using the second theoretical output power and the power adjustment value. For example, the adjusted cut-off power of the water heater can be obtained by subtracting the power adjustment value from the second theoretical output power. In this way, if insufficient air intake pressure is detected after a period of time, the adjusted cut-off power is relatively close to the actual output power of the water heater before the number of burners is adjusted, thereby preventing water temperature fluctuations.

[0083] Specifically, obtaining the second actual output power of the water heater includes: obtaining a fourth parameter representing the amount of water in the water heater; obtaining the actual temperature of the water in the water heater; and determining the second actual output power of the water heater based on the fourth parameter and the actual temperature of the water in the water heater. For example, the fourth parameter representing the amount of water in the water heater may be the mass of the water in the water heater, the volume of the water in the water heater, the flow rate of the water in the water heater, etc.

[0084] Specifically, obtaining the power adjustment value based on the second actual output power and the second theoretical output power includes: obtaining a preset adjustment coefficient; and obtaining the power adjustment value based on the adjustment coefficient, the second actual output power, and the second theoretical output power. For example, the power adjustment value may be obtained by calculating the difference between the second theoretical output power and the second actual output power and multiplying the difference by the adjustment coefficient. In this manner, the power adjustment value can be accurately determined.

[0085] The method for reducing the cut-off power of the water heater provided in this embodiment can make the adjusted cut-off power closer to the actual output power of the water heater before the number of fire bars is adjusted, without causing fluctuations in water temperature.

[0086] In this embodiment, a method for controlling a water heater is provided, which can be used in computer equipment. Figure 6 FIG. 1 is a flow chart of another water heater control method according to an embodiment of the present invention. Figure 6 As shown, the process includes the following steps:

[0087] Step S601: Acquire the actual temperature of water in the water heater.

[0088] Step S602: Obtain the set temperature of water in the water heater.

[0089] Step S603: When the actual temperature is lower than the set temperature, a first actual output power and a first theoretical output power of the water heater are obtained.

[0090] Step S604: determining whether the intake pressure of the water heater is sufficient according to the first actual output power and the first theoretical output power.

[0091] Step S605: When the air inlet pressure of the water heater is insufficient, the cut-off power of the water heater is reduced.

[0092] The method for reducing the cut-off power of the water heater provided in this embodiment determines whether the intake pressure of the water heater is sufficient only when the actual temperature is lower than the set temperature. When the intake pressure is insufficient, the cut-off power of the water heater is reduced, thereby reducing the computing power of the computer equipment and reducing power consumption.

[0093] In order to more clearly illustrate the control method of the water heater of the embodiment of the present invention, the switching between 2 rows of fire and 4 rows of fire is taken as an example for explanation, where the maximum theoretical output power of 2 rows of fire is 10Kw, and the minimum theoretical output power of 4 rows of fire is 8Kw.

[0094] In the case of insufficient inlet pressure of the water heater, when the user demand load is between the maximum fire load of row 2 and the minimum fire load of row 4, there will be repeated switching between the maximum fire load of row 2 and the minimum fire load of row 4, and the water temperature will fluctuate greatly. For example, Figure 7 As shown, T_set represents the target outlet water temperature, and it is assumed that the required output power corresponding to the target outlet water temperature is 8.5Kw.

[0095] When the actual outlet water temperature is lower than the target outlet water temperature, the water heater will continue to increase the output power by increasing the opening of the proportional valve. However, due to insufficient intake pressure, the actual output power of the water heater will not continue to increase. Instead, it will stop increasing when it reaches a certain value, such as 8Kw. After that, when the opening of the proportional valve continues to increase, the theoretical output power of the water heater will increase. Figure 7 As shown by line 1 in the figure; however, the actual output power of the water heater remains unchanged, as shown in Figure 7 As shown by line 2 in , the actual outlet water temperature of the water heater will still be lower than the target outlet water temperature.

[0096] When the opening of the proportional valve increases to the maximum value, that is, Figure 7Before the improvement, as shown in line 3, the maximum theoretical output power of the two-burner system is 10 kW. Switching to 10 kW for the four-burner system causes the water temperature to rise rapidly, as shown in 7. The actual outlet water temperature exceeds the target outlet water temperature. To achieve the target outlet water temperature, the water heater's actual output power needs to be reduced, meaning it needs to be adjusted downward from 10 kW for the four-burner system. For example, only after adjusting to 8 kW for the four-burner system does the actual outlet water temperature reach the target outlet water temperature. However, due to the hysteresis in outlet water temperature measurement, the actual outlet water temperature will fall below the target outlet water temperature after the outlet water temperature stabilizes. This results in repeated switching between the maximum outlet water temperature of the two-burner system and the minimum outlet water temperature of the four-burner system, resulting in large water temperature fluctuations and a very poor user experience.

[0097] like Figure 8 As shown, when the air inlet pressure of the water heater is insufficient, the water heater adopts two-row combustion. When the opening of the proportional valve reaches the maximum, the actual output power P_real of the water heater is less than the maximum theoretical power P2_max. When the cut-off power P_x is equal to the maximum theoretical power P2_max, the water temperature rises suddenly.

[0098] Based on this, an embodiment of the present invention provides a method for controlling a water heater, such as Figure 9 As shown, the control method of the water heater includes the following steps:

[0099] 1. Start the gas water heater, calculate the actual output power P_real, and obtain the theoretical output power P_theory.

[0100] 2. Calculate the actual output power curve slope k_real in real time based on the actual output power P_real; calculate the theoretical output power curve slope k_theory in real time based on P_theory;

[0101] 3. Real-time judgment of k_rea∈(kr1,kr2); if so, it means the actual output power is stable, and go to step 4; if not, return to step 1;

[0102] 4. Real-time judgment of k_theory∈(ks1,ks2); if so, it means that the theoretical output power is gradually increasing, and go to step 5; if not, return to step 1;

[0103] 5. Update the cut-off power p_x of the combustion section according to the following formula, K_p∈[0,1].

[0104] P_x=P_theory–k_p*(P_theory–Preal)

[0105] It should be noted that the above kr1, kr2, ks1, ks2, and k_p can be selected based on experimental experience.

[0106] like Figure 10 As shown, in the Figure 9 After the control method is implemented, when the air inlet pressure of the water heater is insufficient, the water heater uses two-row fire combustion. When the opening of the proportional valve reaches the maximum, the actual output power P_real of the water heater is basically the same as the cut-off power P_x, so the water temperature will not rise suddenly.

[0107] This embodiment also provides a water heater control device for implementing the above-mentioned embodiments and preferred embodiments. Details already described will not be repeated. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0108] This embodiment provides a control device for a water heater, such as Figure 11 Shown, including:

[0109] The acquisition module 111 is configured to acquire a first actual output power and a first theoretical output power of the water heater.

[0110] The intake pressure determination module 112 is configured to determine whether the intake pressure of the water heater is sufficient according to the first actual output power and the first theoretical output power.

[0111] The cut-off power adjustment module 113 is used to reduce the cut-off power of the water heater when the air inlet pressure of the water heater is insufficient.

[0112] In some optional embodiments, the intake pressure judgment module 112 is used to: determine whether the actual output power of the water heater is stable within a preset time period based on multiple first actual output powers obtained by the water heater within the time period; determine whether the theoretical output power of the water heater gradually increases within the time period based on multiple first theoretical output powers obtained by the water heater within the time period; when the actual output power of the water heater is output steadily within the time period and the theoretical output power of the water heater gradually increases within the time period, it is determined that the intake pressure of the water heater is insufficient.

[0113] The intake pressure judgment module 112 is specifically used to: determine the first slope of the actual output power of the water heater within a time period based on multiple first actual output powers; when the first slope belongs to a preset first range, determine that the actual output power of the water heater is stable within the time period.

[0114] The intake pressure judgment module 112 is specifically used to: determine the second slope of the theoretical output power of the water heater within a time period based on multiple first theoretical output powers; when the second slope belongs to a preset second range, determine that the theoretical output power of the water heater gradually increases within the time period.

[0115] In some optional implementations, the intake pressure determination module 112 is configured to calculate a difference between the first actual output power and the first theoretical output power; and determine that the intake pressure of the water heater is insufficient when the difference is greater than a preset first threshold.

[0116] In some optional implementations, the cut-off power adjustment module 113 is configured to: obtain a second theoretical output power of the water heater when the air inlet pressure is insufficient; and obtain an adjusted cut-off power of the water heater according to the second theoretical output power.

[0117] In some optional implementations, the cut-off power adjustment module 113 is specifically configured to use the second theoretical output power as the adjusted cut-off power of the water heater.

[0118] In some optional embodiments, the off-load power adjustment module 113 is specifically used to: obtain the second actual output power of the water heater; obtain a power adjustment value based on the second actual output power and the second theoretical output power; and obtain the adjusted off-load power of the water heater using the second theoretical output power and the power adjustment value.

[0119] In some optional implementations, the row power adjustment module 113 is specifically configured to: obtain a preset adjustment coefficient; and obtain a power adjustment value according to the adjustment coefficient, the second actual output power, and the second theoretical output power.

[0120] In some optional implementations, the acquisition module 111 is specifically used to: acquire a first parameter for characterizing the opening of the proportional valve; and determine a first theoretical output power of the water heater according to the first parameter.

[0121] In some optional implementations, the acquisition module 111 is specifically used to: acquire a second parameter used to characterize the opening of the water heater proportional valve; and determine a second theoretical output power of the water heater according to the second parameter.

[0122] In some optional embodiments, the acquisition module 111 is specifically used to: obtain a third parameter used to characterize the amount of water in the water heater; obtain the actual temperature of the water in the water heater; and determine the first actual output power of the water heater based on the third parameter and the actual temperature of the water in the water heater.

[0123] In some optional embodiments, the acquisition module 111 is specifically used to: obtain a fourth parameter used to characterize the amount of water in the water heater; obtain the actual temperature of the water in the water heater; and determine the second actual output power of the water heater based on the fourth parameter and the actual temperature of the water in the water heater.

[0124] In some optional embodiments, the acquisition module 111 is also used to: obtain the actual temperature of water in the water heater; obtain the set temperature of the water heater; when the actual temperature is lower than the set temperature, execute the steps of obtaining the first actual output power and the first theoretical output power of the water heater.

[0125] The water heater control device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0126] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0127] The embodiment of the present invention also provides a computer device having the above Figure 11 Water heater controls shown.

[0128] See also Figure 12 , Figure 12 is a structural diagram of a computer device provided by an optional embodiment of the present invention, such as Figure 12 As shown, the computer device includes: one or more processors 10, memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components utilize different buses to communicate with each other and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in the memory or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Equally, multiple computer devices can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 12 A processor 10 is taken as an example.

[0129] The processor 10 may be a central processing unit, a network processor, or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0130] The memory 20 stores instructions that can be executed by at least one processor 10, so as to enable at least one processor 10 to execute the method shown in the above embodiment.

[0131] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created based on the use of a computer device for displaying a small program landing page, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0132] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0133] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 20 can be connected via a bus or other means. Figure 12 The bus connection is taken as an example.

[0134] The input device 30 can receive input digital or character information and generate key signal input related to user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touch pad, an indicator stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display, and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0135] The embodiment of the present invention also provides a computer-readable storage medium. The above-mentioned method according to the embodiment of the present invention can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state drive, etc.; further, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0136] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for controlling a water heater, characterized in that: The method comprises: Obtaining a first actual output power and a first theoretical output power of the water heater; determining whether the air inlet pressure of the water heater is sufficient according to the first actual output power and the first theoretical output power; When the air inlet pressure of the water heater is insufficient, reducing the cut-off power of the water heater; Acquiring the first theoretical output power includes: acquiring a first parameter for characterizing an opening of a proportional valve, and determining the first theoretical output power according to the first parameter; The determining whether the intake pressure of the water heater is sufficient according to the first actual output power and the first theoretical output power includes: determining whether the actual output power of the water heater is stable within a preset time period according to a plurality of first actual output powers of the water heater obtained within the preset time period; determining whether the theoretical output power of the water heater gradually increases within the time period according to a plurality of first theoretical output powers of the water heater obtained within the time period; When the actual output power of the water heater is output steadily within the time period and the theoretical output power of the water heater gradually increases within the time period, it is determined that the air intake pressure of the water heater is insufficient.

2. The method according to claim 1, characterized in that The determining, based on a plurality of first actual output powers of the water heater obtained within a preset time period, whether the actual output power of the water heater is stable within the time period includes: determining a first slope of the actual output power of the water heater within the time period according to a plurality of first actual output powers; When the first slope falls within a preset first range, determining that the actual output power of the water heater is stable within the time period; And / or, determining whether the theoretical output power of the water heater gradually increases within the time period according to multiple first theoretical output powers of the water heater obtained within the time period includes: determining a second slope of the theoretical output power of the water heater within the time period according to the plurality of first theoretical output powers; When the second slope falls within a preset second range, it is determined that the theoretical output power of the water heater gradually increases within the time period.

3. The method according to claim 1, characterized in that The determining whether the intake pressure of the water heater is sufficient according to the first actual output power and the first theoretical output power includes: Calculating a difference between the first actual output power and the first theoretical output power; When the difference is greater than a preset first threshold, it is determined that the air intake pressure of the water heater is insufficient.

4. The method according to claim 1, wherein Also includes: Obtaining the actual temperature of water in the water heater; Obtaining a set temperature of the water heater; When the actual temperature is lower than the set temperature, the step of obtaining a first actual output power and a first theoretical output power of the water heater is performed.

5. The method according to any one of claims 1 to 4, characterized in that When the air inlet pressure of the water heater is insufficient, reducing the cut-off power of the water heater includes: Obtaining a second theoretical output power of the water heater when the air intake pressure is insufficient; The adjusted cut-off power of the water heater is obtained according to the second theoretical output power.

6. The method according to claim 5, characterized in that The step of obtaining the adjusted cut-off power of the water heater according to the second theoretical output power includes: The second theoretical output power is used as the adjusted cut-off power of the water heater.

7. The method according to claim 5, characterized in that The step of obtaining the adjusted cut-off power of the water heater according to the second theoretical output power includes: Obtaining a second actual output power of the water heater; Obtaining a power adjustment value according to the second actual output power and the second theoretical output power; The adjusted cut-off power of the water heater is obtained by using the second theoretical output power and the power adjustment value.

8. The method according to claim 7, characterized in that The obtaining of the power adjustment value according to the second actual output power and the second theoretical output power includes: Get the preset adjustment coefficient; The power adjustment value is obtained according to the adjustment coefficient, the second actual output power and the second theoretical output power.

9. The method according to claim 5, characterized in that The obtaining of the first theoretical output power of the water heater includes: Acquiring a first parameter for characterizing the opening of the proportional valve; determining a first theoretical output power of the water heater according to the first parameter; Alternatively, the obtaining of the second theoretical output power of the water heater at the moment when the air intake pressure is insufficient includes: Obtaining a second parameter for characterizing the opening of a proportional valve of the water heater; A second theoretical output power of the water heater is determined according to the second parameter.

10. The method according to claim 7, characterized in that The obtaining of the first actual output power of the water heater includes: obtaining a third parameter for characterizing the amount of water in the water heater; Obtaining the actual temperature of the water in the water heater; determining a first actual output power of the water heater according to the third parameter and the actual temperature of the water in the water heater; Alternatively, obtaining the second actual output power of the water heater includes: obtaining a fourth parameter for characterizing the amount of water in the water heater; Obtaining the actual temperature of the water in the water heater; The second actual output power of the water heater is determined according to the fourth parameter and the actual temperature of the water in the water heater.

11. A control device for a water heater, characterized in that: The device comprises: an acquisition module, configured to acquire a first actual output power and a first theoretical output power of the water heater; wherein acquiring the first theoretical output power comprises: acquiring a first parameter for characterizing an opening of a proportional valve, and determining the first theoretical output power according to the first parameter; an intake pressure judgment module, configured to determine whether the intake pressure of the water heater is sufficient based on the first actual output power and the first theoretical output power; the determination of whether the intake pressure of the water heater is sufficient based on the first actual output power and the first theoretical output power comprises: determining whether the actual output power of the water heater is stable within a preset time period based on multiple first actual output powers obtained by the water heater within the time period; determining whether the theoretical output power of the water heater gradually increases within the time period based on multiple first theoretical output powers obtained by the water heater within the time period; when the actual output power of the water heater is output steadily within the time period and the theoretical output power of the water heater gradually increases within the time period, determining that the intake pressure of the water heater is insufficient; The cut-off power adjustment module is used to reduce the cut-off power of the water heater when the air inlet pressure of the water heater is insufficient.

12. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the control method of the water heater according to any one of claims 1 to 10 by executing the computer instructions.

13. A water heater, characterized in that: A computer device comprising the device of claim 12.

14. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the water heater control method according to any one of claims 1 to 10.

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