A gas water heater, a gas water heater anti-freezing protection method, device and equipment

Abstract

This invention relates to the field of electrical equipment technology, and discloses a gas water heater, a method, device, and equipment for preventing freezing of a gas water heater. The method includes the following steps: after the gas water heater stops burning, acquiring the operating parameters of the gas water heater before the gas supply was stopped, and the heat dissipation parameters that reflect the heat dissipation from the water outlet of the gas water heater at the current moment; determining the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and the operating parameters; and determining whether freezing protection is needed for the gas water heater based on the current predicted temperature. Since the current predicted temperature is the lowest temperature in the gas water heater's pipeline at the current moment, it is possible to accurately determine whether freezing protection is needed for the gas water heater based on the current predicted temperature.

Description

Technical Field

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

[0002] Gas water heaters used in northern regions are equipped with antifreeze protection. Gas water heaters with antifreeze protection can be divided into two types: non-zero cold water models and zero cold water models.

[0003] Non-zero cold water models have a heating device with a temperature control switch installed on the heat exchanger. When a low temperature is detected, the temperature control switch closes, supplying 220V AC power to start the heating device, ensuring that the internal pipes of the gas water heater will not crack due to freezing.

[0004] Zero-cold-water models monitor the outlet water temperature in real time. When the outlet water temperature falls below a threshold, the water pump is activated for circulation or combustion is started to circulate or heat the circulation pipes, thus preventing freezing. However, if the gas water heater cools down too quickly, it cannot prevent freezing in time, causing the water pipes to freeze. Summary of the Invention

[0005] In view of this, the present invention provides a gas water heater, a gas water heater antifreeze protection method, device and equipment to solve the problem that gas water heaters cool down too quickly and cannot be prevented from freezing in time.

[0006] In a first aspect, embodiments of the present invention provide a method for preventing freezing of a gas water heater, comprising the following steps: after the gas water heater stops burning, acquiring the operating parameters of the gas water heater before the gas was stopped, and the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment; determining the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and the operating parameters; and determining whether the gas water heater needs to be protected against freezing based on the current predicted temperature.

[0007] The gas water heater antifreeze protection method provided in this embodiment obtains the operating parameters of the gas water heater before combustion stops, and the heat dissipation parameters that reflect the heat dissipation of the gas water heater outlet at the current moment, after the gas water heater stops burning. Based on the heat dissipation parameters and operating parameters, the current predicted temperature of the heat exchanger in the gas water heater is determined. When the current predicted temperature is lower than a preset first threshold, the water pump of the gas water heater is turned on to provide antifreeze protection. Since the current predicted temperature is the lowest temperature in the gas water heater pipeline at the current moment, it can accurately determine whether the gas water heater needs antifreeze protection.

[0008] In one optional implementation, the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment include: the first time elapsed from the moment the gas water heater stopped burning to the current moment, the first actual outlet water temperature of the gas water heater at the current moment, and the ambient temperature of the location where the gas water heater is located.

[0009] This allows for accurate calculation of the heat dissipation from the outlet of a gas water heater.

[0010] In one optional implementation, determining the current predicted temperature of the heat exchanger in the gas water heater based on heat dissipation parameters and operating parameters includes: obtaining a preset correction factor; inputting the operating parameters, the first actual outlet water temperature, the ambient temperature, the first duration, and the correction factor into a preset first formula to obtain the current predicted temperature.

[0011] This allows for the accurate determination of the current predicted temperature of the heat exchanger.

[0012] In one optional implementation, determining whether to provide antifreeze protection for the gas water heater based on the current predicted temperature includes: determining whether the current predicted temperature is less than a preset first threshold; providing antifreeze protection for the gas water heater when the current predicted temperature is less than the preset first threshold; and taking the next moment as the current moment when the current predicted temperature is greater than or equal to the first threshold, and returning the heat dissipation parameters that reflect the heat dissipation of the gas water heater outlet at the current moment.

[0013] This allows for real-time antifreeze protection of the gas water heater after combustion has stopped.

[0014] In one alternative implementation, before turning on the water pump of the gas water heater to provide antifreeze protection for the gas water heater, the method further includes: when a water usage command is received, starting the gas water heater and controlling the gas water heater to operate according to the water usage command.

[0015] This ensures that the antifreeze protection of the gas water heater does not affect its normal operation.

[0016] In one optional implementation, after turning on the water pump of the gas water heater to provide antifreeze protection for the gas water heater, the method further includes: obtaining the lowest outlet water temperature within a preset first time period; calculating the difference between the lowest outlet water temperature and the current predicted temperature; and updating the correction factor based on the lowest outlet water temperature and the current predicted temperature when the difference exceeds a preset first range.

[0017] This is because the gas water heater's pump is activated when the current predicted temperature is below a first threshold. Assuming the current predicted temperature is the heat exchanger temperature at time T1, the lowest outlet water temperature within the preset first time period reflects the actual temperature of the heat exchanger at time T1. Therefore, when the difference between the lowest outlet water temperature and the current predicted temperature is large, the correction factor can be updated to make the predicted heat exchanger temperature more accurate in the next prediction. In an optional implementation, after activating the gas water heater's pump to provide antifreeze protection, the process further includes: continuously acquiring the second actual outlet water temperature of the gas water heater at the current time; controlling the gas water heater to burn when the second actual outlet water temperature is below a preset second threshold; and controlling the pump to stop operating when the second actual outlet water temperature is above a preset third threshold.

[0018] This is because, after the water pump is turned on, if the water temperature in the gas water heater pipes drops significantly, the gas water heater pipes are still at risk of freezing. Therefore, when the second actual outlet water temperature of the gas water heater is less than the second threshold, it is necessary to control the gas water heater to burn in order to protect the gas water heater from freezing by heating.

[0019] In one optional implementation, after controlling the gas water heater to ignite, the method further includes: continuing to acquire the third actual outlet water temperature of the gas water heater at the current moment; and controlling the gas water heater to stop igniting when the third actual outlet water temperature is greater than a preset fourth threshold.

[0020] Therefore, under appropriate conditions, the antifreeze protection can be terminated.

[0021] In one optional implementation, after determining the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and operating parameters, the method further includes: determining whether the current predicted temperature is less than the first actual outlet water temperature; when the current predicted temperature is less than or equal to the first actual outlet water temperature, determining whether the gas water heater needs to be protected against freezing based on the current predicted temperature; when the current predicted temperature is greater than the first actual outlet water temperature, determining whether the gas water heater needs to be protected against freezing based on the first actual outlet water temperature.

[0022] This allows for accurate determination of whether a gas water heater needs antifreeze protection, even if the timing of antifreeze application for the gas water heater occurs before the intersection of the heat exchanger temperature change curve and the outlet water temperature change curve.

[0023] Secondly, embodiments of the present invention also provide a gas water heater antifreeze protection device, the device comprising an acquisition module, a heat exchanger temperature prediction module, and an antifreeze protection module; after the gas water heater stops burning, the acquisition module is used to acquire the operating parameters of the gas water heater before the gas supply was stopped, and the heat dissipation parameters that reflect the heat dissipation of the gas water heater outlet at the current moment; the heat exchanger temperature prediction module is used to determine the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and the operating parameters; the antifreeze protection module is used to determine whether the gas water heater needs to be protected against freezing based on the current predicted temperature.

[0024] Thirdly, embodiments of the present invention also provide a computer device, including 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 antifreeze protection method described in the first aspect or any corresponding embodiment.

[0025] Fourthly, embodiments of the present invention also provide a gas water heater, including the computer equipment of the third aspect.

[0026] Fifthly, embodiments of the present invention also provide a computer-readable storage medium storing computer instructions, which are used to cause a computer to execute the gas water heater antifreeze protection method of the first aspect or any corresponding embodiment described above. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a schematic diagram of a gas water heater.

[0029] Figure 2 This is a schematic diagram showing the changes in heat exchanger temperature and outlet water temperature over time in the gas water heater pipeline.

[0030] Figure 3 This is a flowchart of a gas water heater antifreeze protection method according to an embodiment of the present invention;

[0031] Figure 4 This is a flowchart of another gas water heater antifreeze protection method according to an embodiment of the present invention;

[0032] Figure 5This is a flowchart of another gas water heater antifreeze protection method according to an embodiment of the present invention;

[0033] Figure 6 This is a flowchart of another gas water heater antifreeze protection method according to an embodiment of the present invention.

[0034] Figure 7 This is a flowchart illustrating an example of a gas water heater antifreeze protection method according to an embodiment of the present invention;

[0035] Figure 8 This is a structural block diagram of a gas water heater antifreeze protection device according to an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of a gas water heater according to an embodiment of the present invention;

[0038] The components include: 1. Heat exchanger; 2. Water pump; 3. Water flow sensor; 4. Ambient temperature sensor; 5. Outlet water temperature sensor; and 6. Fan. Detailed Implementation

[0039] 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.

[0040] Figure 1 This is a structural diagram of a gas water heater, such as... Figure 1 As shown, the gas water heater includes a fan 6, a heat exchanger 1, a water pump 2, a water flow sensor 3, an outlet water temperature sensor 5, and an ambient temperature sensor 4. The water pump 2 drives water circulation within the gas water heater; the heat exchanger 1 heats the water entering the gas water heater; the water flow sensor 3 detects the water flow rate entering the gas water heater; and the outlet water temperature sensor 5 detects the outlet water temperature of the gas water heater.

[0041] Figure 2 This is a schematic diagram showing the changes in heat exchanger temperature and outlet water temperature over time in the gas water heater piping. Figure 2 In the diagram, the dashed line represents the heat exchanger temperature changing over time, and the solid line represents the outlet water temperature changing over time. For example... Figure 2As shown, when a gas water heater is working, the heat exchanger temperature and the outlet water temperature are the same, for example, both A℃. When the gas water heater stops burning, the outlet water temperature detected by the sensor will gradually decrease. However, there is residual heat in the combustion chamber of the heat exchanger, so even if the entire unit stops burning, the temperature of the heat exchanger will still rise due to the residual heat. After the residual heat disappears, due to the structure of the heat exchanger, its heat dissipation is faster than other parts of the pipes, so the water temperature inside the heat exchanger drops relatively quickly. Figure 2 As shown, when the curves of heat exchanger temperature change over time and outlet water temperature change over time intersect, at the same moment, the heat exchanger temperature is lower than the outlet water temperature. In related technologies, if the water pump is started for circulation or combustion for antifreeze when the outlet water temperature is lower than the threshold, the antifreeze action is only taken at this time because the heat exchanger temperature is lower than the outlet water temperature, which can easily cause the water pipes to freeze.

[0042] According to an embodiment of the present invention, an embodiment of a method for preventing freezing of a gas water heater 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.

[0043] This embodiment provides a method for preventing freezing of a gas water heater, which can be used in computer equipment. Figure 3 This is a flowchart of a gas water heater antifreeze protection method according to an embodiment of the present invention, such as... Figure 3 As shown, the process includes the following steps:

[0044] Step S301: After the gas water heater stops burning, obtain the operating parameters of the gas water heater before the gas was turned off, and the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment.

[0045] As a specific implementation method, the operating parameters of a gas water heater before gas supply is stopped can be the combustion power of the gas water heater.

[0046] As a specific implementation method, the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment include: the first time from the moment the gas water heater stops burning to the current moment, the first actual outlet water temperature of the gas water heater at the current moment, and the ambient temperature of the location of the gas water heater.

[0047] Step S302: Determine the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and operating parameters.

[0048] like Figure 2As shown, when the curves of heat exchanger temperature change over time and outlet water temperature change over time intersect, at the same moment, the heat exchanger temperature is lower than the outlet water temperature. Generally, the time for antifreeze treatment of gas water heaters occurs after the intersection of these two curves. Therefore, this embodiment of the invention predicts the heat exchanger temperature in the gas water heater based on heat dissipation parameters and operating parameters, and determines whether antifreeze treatment is necessary based on the heat exchanger temperature.

[0049] Step S303: Determine whether the gas water heater needs to be protected against freezing based on the current predicted temperature.

[0050] As a specific implementation method, the water pump can be started to circulate or the combustion can be ignited to flow through or heat the circulation pipeline, thereby achieving the effect of antifreeze.

[0051] As shown above, the current predicted temperature is the temperature of the heat exchanger at the current moment, which is obtained through prediction. Since the time for antifreeze protection of the gas water heater is after the intersection of the heat exchanger temperature change curve with the outlet water temperature change curve with time, the current predicted temperature is higher than the outlet water temperature at the current moment. The current predicted temperature is the lowest temperature in the gas water heater pipeline at the current moment. Therefore, based on the current predicted temperature, it can be accurately determined whether the gas water heater needs antifreeze protection.

[0052] For example, the first threshold can be 5 to 8°C.

[0053] The gas water heater antifreeze protection method provided in this embodiment obtains the operating parameters of the gas water heater before combustion stops, and the heat dissipation parameters that reflect the heat dissipation of the gas water heater outlet at the current moment, after the gas water heater stops burning. Based on the heat dissipation parameters and operating parameters, the current predicted temperature of the heat exchanger in the gas water heater is determined. When the current predicted temperature is lower than a preset first threshold, the water pump of the gas water heater is turned on to provide antifreeze protection. Since the current predicted temperature is the lowest temperature in the gas water heater pipeline at the current moment, it can accurately determine whether the gas water heater needs antifreeze protection.

[0054] This embodiment provides a method for preventing freezing of a gas water heater, which can be used in computer equipment. Figure 4 This is a flowchart of another gas water heater antifreeze protection method according to an embodiment of the present invention, such as... Figure 4 As shown, the process includes the following steps:

[0055] Step S401: After the gas water heater stops burning, obtain the operating parameters of the gas water heater before it stopped burning.

[0056] As a specific implementation method, the operating parameters of a gas water heater before gas supply is stopped can be the combustion power of the gas water heater.

[0057] Step S402: Obtain the first duration from the moment the gas water heater stopped burning to the current moment, the first actual outlet water temperature of the gas water heater at the current moment, and the ambient temperature of the location of the gas water heater.

[0058] As a specific implementation method, an ambient temperature sensor can be installed in the gas water heater to obtain the ambient temperature at the location of the gas water heater; an outlet water temperature sensor can be installed in the gas water heater to obtain the first actual outlet water temperature of the gas water heater.

[0059] Step S403: Obtain the preset correction factor.

[0060] Step S404: Input the operating parameters, the first actual outlet water temperature, the ambient temperature, the first duration, and the correction factor into the preset first formula to obtain the current predicted temperature.

[0061] As a specific implementation method, the first formula can be obtained through experiments. For example, during the experiment, the combustion power, outlet water temperature, ambient temperature, first duration, and heat exchanger temperature are obtained respectively. The combustion power, outlet water temperature, ambient temperature, first duration, and heat exchanger temperature are fitted to obtain the correction factor and the first formula.

[0062] Step S405: Determine whether the current predicted temperature is less than the first threshold. If the current predicted temperature is greater than or equal to the first threshold, proceed to step S402; if the current predicted temperature is less than the first threshold, proceed to step S406.

[0063] As a specific implementation method, after step S404, the method further includes: determining whether the current predicted temperature is less than the first actual outlet water temperature; when the current predicted temperature is less than or equal to the first actual outlet water temperature, determining whether the gas water heater needs to be protected against freezing based on the current predicted temperature; when the current predicted temperature is greater than the first actual outlet water temperature, determining whether the gas water heater needs to be protected against freezing based on the first actual outlet water temperature.

[0064] This allows for accurate determination of whether a gas water heater needs antifreeze protection, even if the timing of antifreeze application for the gas water heater occurs before the intersection of the heat exchanger temperature change curve and the outlet water temperature change curve.

[0065] Step S406: Turn on the water pump of the gas water heater to provide antifreeze protection for the gas water heater. The antifreeze protection method for gas water heaters provided in this embodiment inputs the operating parameters, the first actual outlet water temperature, the ambient temperature, the first duration, and the correction factor into a preset first formula to obtain the current predicted temperature. Since the current predicted temperature is the lowest temperature in the gas water heater pipeline at the current moment, it can accurately determine whether the gas water heater needs antifreeze protection based on the current predicted temperature.

[0066] This embodiment provides a method for preventing freezing of a gas water heater, which can be used in computer equipment. Figure 5 This is a flowchart of another gas water heater antifreeze protection method according to an embodiment of the present invention, as follows: Figure 5 As shown, the process includes the following steps:

[0067] Step S501: After the gas water heater stops burning, obtain the operating parameters of the gas water heater before it stopped burning.

[0068] Step S502: Obtain the first duration from the moment the gas water heater stopped burning to the current moment, the first actual outlet water temperature of the gas water heater at the current moment, and the ambient temperature of the location of the gas water heater.

[0069] Step S503: Obtain the preset correction factor.

[0070] Step S504: Input the operating parameters, the first actual outlet water temperature, the ambient temperature, the first duration, and the correction factor into the preset first formula to obtain the current predicted temperature.

[0071] Step S505: Determine whether the current predicted temperature is less than the first threshold. If the current predicted temperature is greater than or equal to the first threshold, proceed to step S502; if the current predicted temperature is less than the first threshold, proceed to step S506.

[0072] Step S506: Turn on the water pump of the gas water heater to provide antifreeze protection for the gas water heater.

[0073] Step S507: Obtain the lowest water temperature at the outlet within the preset first time period.

[0074] After the water pump is turned on, the water in the gas water heater pipes can flow, so the true temperature of the heat exchanger can be obtained by obtaining the lowest outlet water temperature within the preset first time period.

[0075] Step S508: Calculate the difference between the lowest outlet water temperature and the current predicted temperature.

[0076] Step S509: Determine whether the search value belongs to a preset first range. If the difference value belongs to the preset first range, proceed to step S510; if the difference value exceeds the preset first range, proceed to step S511.

[0077] For example, the first range can be -1 to 1℃.

[0078] Step S510: Keep the correction factor unchanged.

[0079] Step S511: Update the correction factor based on the lowest outlet water temperature and the current predicted temperature.

[0080] This is because the gas water heater's pump is activated when the current predicted temperature is below the first threshold. Assuming the current predicted temperature is the heat exchanger temperature at time T1 obtained through prediction, the lowest outlet water temperature within the first time period preset in step S507 reflects the actual temperature of the heat exchanger at time T1. Therefore, when the difference between the lowest outlet water temperature and the current predicted temperature is large, the correction factor can be updated to make the predicted heat exchanger temperature more accurate in the next prediction.

[0081] The gas water heater antifreeze protection method provided in this embodiment can not only accurately determine whether the gas water heater needs antifreeze protection, but also make the predicted temperature of the heat exchanger more accurate in the next prediction by updating the correction factor.

[0082] This embodiment provides a method for preventing freezing of a gas water heater, which can be used in computer equipment. Figure 6 This is a flowchart of another gas water heater antifreeze protection method according to an embodiment of the present invention, such as... Figure 6 and Figure 7 As shown, the process includes the following steps:

[0083] Step S601: After the gas water heater stops burning, obtain the operating parameters of the gas water heater before it stopped burning.

[0084] Step S602: Obtain the first duration from the moment the gas water heater stopped burning to the current moment, the first actual outlet water temperature of the gas water heater at the current moment, and the ambient temperature of the location of the gas water heater.

[0085] Step S603: Obtain the preset correction factor.

[0086] Step S604: Input the operating parameters, the first actual outlet water temperature, the ambient temperature, the first duration, and the correction factor into the preset first formula to obtain the current predicted temperature.

[0087] Step S605: Determine whether the current predicted temperature is less than the first threshold. If the current predicted temperature is greater than or equal to the first threshold, proceed to step S602; if the current predicted temperature is less than the first threshold, proceed to step S506.

[0088] Step S606: Turn on the water pump of the gas water heater to provide antifreeze protection for the gas water heater.

[0089] Step S607: Obtain the lowest water temperature at the outlet within the preset first time period.

[0090] Step S608: Calculate the difference between the lowest outlet water temperature and the current predicted temperature.

[0091] Step S609: Determine whether the search value belongs to a preset first range. If the difference value belongs to the preset first range, proceed to step S610; if the difference value exceeds the preset first range, proceed to step S611.

[0092] For example, the first range can be -1 to 1℃.

[0093] Step S610: Keep the correction factor unchanged.

[0094] Step S611: Update the correction factor based on the lowest outlet water temperature and the current predicted temperature.

[0095] Step S612: Continue to obtain the second actual outlet water temperature of the gas water heater at the current moment.

[0096] Step S613: Determine whether the second actual water temperature is less than a preset second threshold. If the second actual water temperature is less than the preset second threshold, proceed to step S614. If the second actual water temperature is greater than or equal to the second threshold, return to step S612. Determine whether the second actual water temperature is greater than a preset third threshold, and if the second actual water temperature is greater than the preset third threshold, control the water pump to stop running.

[0097] For example, the second threshold can be 2–5℃. The third threshold can be 8–11℃.

[0098] Step S614: Control the gas water heater to ignite.

[0099] This is because, in step S606, the gas water heater is protected against freezing by turning on the water pump. However, if the water temperature in the gas water heater pipe drops significantly after the water pump is turned on, the gas water heater pipe is still at risk of freezing. Therefore, when the second actual outlet water temperature of the gas water heater is less than the second threshold, it is necessary to control the gas water heater to burn in order to protect the gas water heater against freezing by heating.

[0100] Step S615: Continue to obtain the third actual outlet water temperature of the gas water heater at the current moment.

[0101] Step S616: Determine whether the third actual water temperature is greater than the preset fourth threshold. If the third actual water temperature is greater than the preset fourth threshold, proceed to step S617; if the third actual water temperature is less than or equal to the preset fourth threshold, return to step S615.

[0102] Step S617: Control the gas water heater to stop combustion.

[0103] For example, the fourth threshold is 15–30°C.

[0104] To illustrate the antifreeze protection method for gas water heaters according to embodiments of the present invention more clearly, a specific example is provided. Figure 7 This is a flowchart illustrating an example of a gas water heater antifreeze protection method according to an embodiment of the present invention, as shown below. Figure 7 As shown, the method for preventing freezing in gas water heaters includes the following steps:

[0105] 1. When the gas water heater stops burning, record the combustion power P before it stops burning, and reset the antifreeze detection time t to zero; proceed to step 2.

[0106] 2. As time progresses, the temperature of the heat exchanger is calculated in real time and used as the activation temperature of the antifreeze function, denoted by T. 防冻温度 It means that T 防冻温度 =f(T) 出水 T 环境 P, Z, t), where T 出水 T represents the hot water outlet temperature of the gas water heater. 环境 The real-time temperature of the water heater installation environment; P is the combustion power before combustion stops; Z is the correction factor used to calibrate operating condition deviations; t is the antifreeze detection time (i.e., the first duration).

[0107] 3. If the user is using water or activating other combustion functions, return to step 1 and wait for the gas water heater to stop burning. Otherwise, continuously check the T value. 防冻温度 <T 阈值1 If so, proceed to step 4; otherwise, stop at step 3.

[0108] 4. Start the water pump to allow the water in the pipes to flow. Record the lowest outlet water temperature 5 seconds after the pump starts. 出水低 This means that if T 出水低 With T 防冻温度 If the difference is within ±1℃, the correction factor is not updated; otherwise, the correction factor is updated according to Z = f(T_antifreeze, T_low_outflow); then proceed to step 5.

[0109] 5. If it is T出水温度 >T 阈值3 The water pump stops running, and the process returns to step 1. At this point, the combustion power P is 0. If T 出水温度 <T 阈值2 Proceed to step 6. Otherwise, the water pump continues to run.

[0110] 6. Start the antifreeze combustion; if it is T 出水温度 >T 阈值4 Stop burning and return to step 1.

[0111] Where T 阈值2 <T 阈值1 <T 阈值3 <T 阈值4 T 阈值2 The value range is 2–5℃; T 阈值1 The value range is 5~8℃; T 阈值3 The value range is 8–11℃; T 阈值3 The value range is 15 to 30℃.

[0112] This embodiment also provides a gas water heater antifreeze protection device, which is used to implement 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.

[0113] This embodiment provides a gas water heater antifreeze protection device, such as... Figure 8 As shown, it includes:

[0114] The acquisition module 801 is used to acquire the working parameters of the gas water heater before it stopped burning, and the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment, after the gas water heater stops burning.

[0115] The heat exchanger temperature prediction module 802 is used to determine the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and operating parameters.

[0116] The antifreeze protection module 803 is used to determine whether the gas water heater needs antifreeze protection based on the current predicted temperature.

[0117] In some optional implementations, the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment include: the first time elapsed from the moment the gas water heater stopped burning to the current moment, the first actual outlet water temperature of the gas water heater at the current moment, and the ambient temperature of the location of the gas water heater.

[0118] In some optional implementations, the heat exchanger temperature prediction module 802 includes a correction factor acquisition unit and a calculation unit. The correction factor acquisition unit is used to acquire a preset correction factor; the calculation unit is used to input the operating parameters, the first actual outlet water temperature, the ambient temperature, the first duration and the correction factor into a preset first formula to obtain the current predicted temperature.

[0119] In some optional implementations, the antifreeze protection module 803 is specifically used to: determine whether the current predicted temperature is less than a preset first threshold; when the current predicted temperature is less than the preset first threshold, perform antifreeze protection on the gas water heater; when the current predicted temperature is greater than or equal to the first threshold, take the next moment as the current moment, and return the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment.

[0120] In some optional implementations, the gas water heater antifreeze protection device also includes a heating module. Before turning on the gas water heater's pump to provide antifreeze protection, the heating module is used to start the gas water heater and control it to operate according to the water usage command upon receiving a water usage instruction.

[0121] In some optional implementations, the gas water heater antifreeze protection device includes a correction factor update module. After the gas water heater's water pump is turned on to provide antifreeze protection, the correction factor update module is used to: obtain the lowest outlet water temperature within a preset first time period; calculate the difference between the lowest outlet water temperature and the current predicted temperature; and update the correction factor based on the lowest outlet water temperature and the current predicted temperature when the difference exceeds a preset first range.

[0122] In some optional implementations, after turning on the water pump of the gas water heater to provide antifreeze protection for the gas water heater, the antifreeze protection module 803 is also used to continue to acquire the second actual outlet water temperature of the gas water heater at the current moment; when the second actual outlet water temperature is less than a preset second threshold, the gas water heater is controlled to start combustion.

[0123] In some optional implementations, after controlling the gas water heater to start combustion, the antifreeze protection module 803 is also used to continue to acquire the third actual outlet water temperature of the gas water heater at the current moment; when the third actual outlet water temperature is greater than a preset fourth threshold, the gas water heater is controlled to stop combustion.

[0124] In some optional implementations, the antifreeze protection module 803 is also used to determine whether the current predicted temperature is less than the first actual outlet water temperature; when the current predicted temperature is less than or equal to the first actual outlet water temperature, it determines whether antifreeze protection is needed for the gas water heater based on the current predicted temperature; when the current predicted temperature is greater than the first actual outlet water temperature, it determines whether antifreeze protection is needed for the gas water heater based on the first actual outlet water temperature.

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

[0126] 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.

[0127] This invention also provides a computer device having the above-described features. Figure 8 The gas water heater shown is equipped with an antifreeze protection device.

[0128] This invention also provides a gas water heater, including the aforementioned computer equipment. For example... Figure 10 As shown, the computer equipment can be a controller, which can communicate with water temperature sensors, ambient temperature sensors, water flow sensors, interactive terminals, gas valves, water pumps, fans, etc.

[0129] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 9 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 9 Take a processor 10 as an example.

[0130] 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.

[0131] 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.

[0132] 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 computer device as shown by a landing page for an app. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory 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 computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0133] 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.

[0134] The computer device also includes an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 40 can be connected via a bus or other means. Figure 9 Taking the example of a connection between China and Israel via a bus.

[0135] Input device 30 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 40 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0136] 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.

[0137] 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 claims.

Claims

1. A method of freeze protection for a gas water heater, the method comprising: The method includes: After the gas water heater stops burning, the operating parameters of the gas water heater before it stopped burning and the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment are obtained respectively, wherein the operating parameters are the combustion power of the gas water heater; The current predicted temperature of the heat exchanger in the gas water heater is determined based on the heat dissipation parameters and the operating parameters. Determine whether the gas water heater needs to be protected against freezing based on the current predicted temperature; The heat dissipation parameters that reflect the heat dissipation of the gas water heater outlet at the current moment include: The first duration from the moment the gas water heater stops burning to the current moment, the first actual outlet water temperature of the gas water heater at the current moment, and the ambient temperature of the location of the gas water heater.

2. The method according to claim 1, characterized in that, Determining the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and the operating parameters includes: Obtain the preset correction factor; The operating parameters, the first actual outlet water temperature, the ambient temperature, the first duration, and the correction factor are input into a preset first formula to obtain the current predicted temperature.

3. The method according to claim 2, characterized in that, The step of determining whether the gas water heater needs antifreeze protection based on the current predicted temperature includes: Determine whether the current predicted temperature is less than a preset first threshold; When the current predicted temperature is less than a preset first threshold, the gas water heater is protected against freezing. When the current predicted temperature is greater than or equal to the first threshold, the next moment is taken as the current moment, and the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment are returned.

4. The method according to claim 3, characterized in that, Before turning on the water pump of the gas water heater to provide antifreeze protection, the method further includes: When a water usage command is received, the gas water heater is started and controlled to operate according to the water usage command.

5. The method according to claim 3, characterized in that, The freeze protection for the gas water heater includes: Turn on the water pump of the gas water heater to provide antifreeze protection for the gas water heater.

6. The method according to claim 5, characterized in that, After turning on the water pump of the gas water heater to provide antifreeze protection, the method further includes: Obtain the lowest water temperature at the outlet within a preset first time period; Calculate the difference between the lowest outlet water temperature and the current predicted temperature; When the difference exceeds a preset first range, the correction factor is updated based on the lowest outlet water temperature and the current predicted temperature.

7. The method according to claim 4, characterized in that, After turning on the water pump of the gas water heater to provide antifreeze protection, the method further includes: Continue to obtain the second actual outlet water temperature of the gas water heater at the current moment; When the second actual outlet water temperature is less than the preset second threshold, the gas water heater is controlled to start combustion; When the second actual outlet water temperature is greater than the preset third threshold, the water pump is controlled to stop running.

8. The method according to claim 7, characterized in that, After controlling the gas water heater to ignite, the method further includes: Continue to obtain the third actual outlet water temperature of the gas water heater at the current moment; When the third actual outlet water temperature is greater than the preset fourth threshold, the gas water heater is controlled to stop combustion.

9. The method according to claim 1, characterized in that, After determining the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and the operating parameters, the method further includes: Determine whether the current predicted temperature is less than or equal to the first actual outlet water temperature; When the current predicted temperature is less than or equal to the first actual outlet water temperature, determine whether the gas water heater needs to be protected against freezing based on the current predicted temperature. When the current predicted temperature is greater than the first actual outlet water temperature, it is determined whether the gas water heater needs to be protected against freezing based on the first actual outlet water temperature.

10. A gas water heater antifreeze protection device, characterized in that, The device includes: The acquisition module is used to acquire the operating parameters of the gas water heater before it stopped burning, and the heat dissipation parameters that can reflect the heat dissipation of the gas water heater outlet at the current moment, after the gas water heater stops burning. The operating parameters are the combustion power of the gas water heater. A heat exchanger temperature prediction module is used to determine the current predicted temperature of the heat exchanger in the gas water heater based on the heat dissipation parameters and the operating parameters. The antifreeze protection module is used to determine whether the gas water heater needs antifreeze protection based on the current predicted temperature. The heat dissipation parameters that reflect the heat dissipation of the gas water heater outlet at the current moment include: the first time elapsed from the moment the gas water heater stopped burning to the current moment, the first actual outlet water temperature of the gas water heater at the current moment, and the ambient temperature of the location of the gas water heater.

11. A computer device, characterized in that, include: The system 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 antifreeze protection method according to any one of claims 1 to 9.

12. A gas-fired water heater, characterized in that, Includes the computer device as described in claim 11.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to execute the gas water heater antifreeze protection method according to any one of claims 1 to 9.

Images