Temperature control method and device, gas water heating equipment and storage medium

Abstract

The invention relates to the technical field of gas water heating equipment, and discloses a temperature control method and device, gas water heating equipment and a storage medium, and the temperature control method comprises the steps that the actual water outlet temperature, the preset water outlet temperature and the fluctuation temperature of the gas water heating equipment are obtained; based on a preset outlet water temperature and the fluctuation temperature, calculating to obtain a target outlet water temperature; in response to the pulse combustion mode of the gas-fired water heating equipment, controlling a burner of the gas-fired water heating equipment to flame out, and if the actual water outlet temperature is smaller than or equal to the target water outlet temperature, controlling the burner to ignite until the actual water outlet temperature is larger than or equal to the preset water outlet temperature, if yes, the combustor is controlled to be shut down, and the judgment that the actual water outlet temperature is smaller than or equal to the target water outlet temperature is executed again. Ignition or flameout of the burner is controlled according to the actual water outlet temperature, the preset water outlet temperature and the target water outlet temperature, and the situation that the actual water outlet temperature of bathroom water is too high is avoided by adjusting the working state of the burner of the gas water heating equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of gas water heaters, and in particular to a temperature control method and device, gas water heaters and a storage medium. Background Art

[0002] In summer, when the inlet water temperature of the gas water heater is high or the inlet water flow rate is small, and the temperature rise required when used in bathroom mode is small, it is easy to exceed the adjustable range of the gas water heater, resulting in the problem of too hot outlet water temperature. If you want to adjust the temperature of the bathroom water to a suitable temperature, you can reduce the power of the gas heating water boiler by reducing the gas supply of the burner. However, the normal combustion of the burner cannot reduce the gas supply indefinitely to reduce the power of the gas water heater, otherwise flashback will occur. The related technology uses a method of reducing the heat load by staged combustion of the burner, but staged combustion has the risk of slow flame transfer and flame transfer failure, and there is still the problem of too hot outlet water temperature. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a temperature control method, device, gas water heater and storage medium, which effectively solve the technical problem of excessively hot water outlet temperature in bathroom mode.

[0004] On the one hand, the above technical problems are solved by the following technical solutions:

[0005] A temperature control method, comprising:

[0006] In response to the gas water heater being in the bathroom mode, obtaining the actual outlet water temperature, the preset outlet water temperature and the fluctuating temperature of the gas water heater;

[0007] Based on the preset water outlet temperature and the fluctuating temperature, a target water outlet temperature is calculated;

[0008] In response to the gas water heater being in the pulse combustion mode, the burner of the gas water heater is controlled to be extinguished. When it is determined that the actual water outlet temperature is less than or equal to the target water outlet temperature, the burner is controlled to ignite until the actual water outlet temperature is greater than or equal to the preset water outlet temperature. The burner is then controlled to be extinguished and returns to execute the judgment that the actual water outlet temperature is less than or equal to the target water outlet temperature; wherein the target water outlet temperature is greater than the preset water outlet temperature.

[0009] Compared with the background technology, the temperature control method described in the present invention has the following beneficial effects: when the gas water heater is in bathroom mode, that is, when the user is using hot water, the actual temperature of the bathroom water of the gas water heater flowing out of the bathroom terminal, the preset water outlet temperature set by the user and the fluctuating temperature are obtained; the target water outlet temperature is calculated by the preset water outlet temperature and the fluctuating temperature; when the gas water heater is in pulse combustion mode, after the burner of the gas water heater is controlled to be extinguished, by comparing the actual water outlet temperature with the target water outlet temperature, if the actual water outlet temperature is less than or equal to the target water outlet temperature, the burner of the gas water heater is controlled to ignite, so as to heat the bathroom water and increase the bathroom temperature. The temperature of bath water; when the actual outlet water temperature is greater than or equal to the preset outlet water temperature, the burner of the gas water heater is controlled to be extinguished, and the waste heat of the heat exchanger is used to continue heating the bathroom water so that the temperature of the bathroom water meets the user's needs, avoiding the heat exchanger from continuously absorbing heat and causing the bathroom water outlet temperature to be too hot. At the same time, the judgment that the actual outlet water temperature is less than or equal to the target outlet water temperature is continued to be executed. Considering that there is a time delay between igniting the burner and heating the bathroom water of the heat exchanger, the target outlet water temperature is set to be greater than the preset outlet water temperature, that is, before the bathroom water outlet temperature drops to the preset outlet water temperature, the burner of the gas water heater is controlled to ignite in advance to stabilize the actual outlet water temperature near the preset outlet water temperature. The present invention can stabilize the actual outlet water temperature near the preset outlet water temperature by adjusting the burner of the gas water heater to a flameout-ignition-extinguishing cycle without adding additional burner sectional valves and water mixing valve components, thereby meeting the user's demand for bathroom water temperature; it solves the problem of excessively hot bathroom water outlet temperature caused by high bathroom water inlet temperature in summer exceeding the temperature control range of the gas water heater, while increasing the environmental adaptability of the gas water heater and broadening the range of constant temperature in the bathroom of the gas water heater.

[0010] In one of the embodiments, before responding to the gas water heater being in the pulse combustion mode, the method includes:

[0011] When the actual outlet water temperature is greater than or equal to the preset outlet water temperature, the gas water heater is controlled to enter the pulse combustion mode.

[0012] In one of the embodiments, before responding to the gas water heater being in the pulse combustion mode, the method includes:

[0013] When the actual outlet water temperature is greater than or equal to the target outlet water temperature, the gas water heater is controlled to enter the pulse combustion mode.

[0014] In one of the embodiments, before responding to the gas water heater being in the pulse combustion mode, the method includes:

[0015] When the actual outlet water temperature is greater than or equal to the target outlet water temperature and lasts for a preset time, the gas water heater is controlled to enter the pulse combustion mode.

[0016] In one of the embodiments, before responding to the gas water heater being in the pulse combustion mode, the method further comprises:

[0017] Determine whether the gas water heater is burning at a minimum load, and if so, control the gas water heater to enter the pulse combustion mode.

[0018] In one embodiment, the gas water heater is a gas heating water heater; the method further includes: in response to the gas water heater being in a pulse combustion mode, controlling a water pump and a fan of the gas heating water heater to be in operation, wherein when the water pump and the fan are in operation, the heating water sequentially enters the condensing heat exchanger, the main heat exchanger and the plate heat exchanger of the gas heating water heater for heat exchange to heat bathroom water.

[0019] In one embodiment, the method further comprises:

[0020] The fluctuation temperature is determined based on the operation conditions of the flameout cycle and the ignition cycle of the gas water heater.

[0021] Secondly, the above technical problems are solved by the following technical solutions:

[0022] A temperature control device for a gas water heater, comprising:

[0023] An acquisition module, for acquiring, in response to the gas water heater being in a bathroom mode, an actual outlet water temperature, a preset outlet water temperature and a fluctuating temperature of the gas water heater;

[0024] A calculation module, configured to calculate a target outlet water temperature based on the preset outlet water temperature and the fluctuating temperature;

[0025] A control module is used to control the burner of the gas water heater to be turned off in response to the gas water heater being in a pulse combustion mode, and when it is judged that the actual water outlet temperature is less than or equal to the target water outlet temperature, control the burner to ignite until the actual water outlet temperature is greater than or equal to the preset water outlet temperature, then control the burner to be turned off and return to execute the judgment that the actual water outlet temperature is less than or equal to the target water outlet temperature.

[0026] Compared with the background technology, the temperature control device of the gas water heater described in the present invention has the following beneficial effects: when the gas water heater is in the bathroom mode, that is, when the user is using hot water, the acquisition module acquires the actual temperature of the bathroom water of the gas water heater flowing out of the bathroom terminal, the preset water outlet temperature set by the user, and the fluctuating temperature; the calculation module calculates the target water outlet temperature through the preset water outlet temperature and the fluctuating temperature; when the gas water heater is in the pulse combustion mode, after the control module controls the burner of the gas water heater to be extinguished, by comparing the actual water outlet temperature with the target water outlet temperature, if the actual water outlet temperature is less than or equal to the target water outlet temperature, the control module controls the burner of the gas water heater to ignite , to heat the bathroom water and increase the temperature of the bathroom water; when the actual water outlet temperature is greater than or equal to the preset water outlet temperature, the control module controls the burner of the gas water heater to turn off, and uses the waste heat of the heat exchanger to continue heating so that the temperature of the bathroom water meets the user's needs, avoiding the heat exchanger from continuously absorbing heat and causing the bathroom water outlet temperature to be too hot. At the same time, the judgment that the actual water outlet temperature is less than or equal to the target water outlet temperature continues to be executed. Considering that there is a time delay between the ignition of the burner and the heating of the bathroom water of the heat exchanger, the target water outlet temperature is set to be greater than the preset water outlet temperature, that is, before the bathroom water outlet temperature drops to the preset water outlet temperature, the burner of the gas water heater is controlled to ignite in advance to stabilize the actual water outlet temperature near the preset water outlet temperature. The present invention can stabilize the actual outlet water temperature near the preset outlet water temperature by adjusting the burner of the gas water heater to a flameout-ignition-extinguishing cycle without adding additional burner sectional valves and water mixing valve components, thereby meeting the user's demand for bathroom water temperature; it solves the problem of excessively hot bathroom water outlet temperature caused by high bathroom water inlet temperature in summer exceeding the temperature control range of the gas water heater, while increasing the environmental adaptability of the gas water heater and broadening the range of constant temperature in the bathroom of the gas water heater.

[0027] In a third aspect, the present invention further provides a gas water heater, comprising: a memory, a processor, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus;

[0028] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the temperature control method as described above.

[0029] In a fourth aspect, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to implement the temperature control method as described above when executed by a processor. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 1 A schematic flow chart of a temperature control method according to an embodiment of the present invention;

[0032] Figure 2 A schematic flow chart of a temperature control method according to another embodiment of the present invention;

[0033] Figure 3 A schematic flow chart of a temperature control method according to another embodiment of the present invention;

[0034] Figure 4 A schematic diagram of the internal structure of a gas water heater according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic structural diagram of a temperature control device for a gas water heater according to an embodiment of the present invention;

[0036] Figure 6 The figure is a schematic diagram of the hardware structure of a gas water heater according to an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Main heat exchanger; 2. Heating water outlet pipe group; 3. Sanitary water outlet pipe group; 4. Sanitary water inlet pipe group; 5. Heating water inlet pipe group; 6. Plate heat exchanger; 7. Condensing heat exchanger. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the related art, taking a gas heating water heater as an example, in summer, the inlet water temperature of the gas heating water heater is high, and the required temperature rise is very small, which is easy to exceed the range that the gas heating water heater can control and adjust, resulting in the phenomenon of hot and cold water temperature. If you want to adjust the temperature of the bathroom water to a suitable temperature, you can reduce the power of the gas heating water heater, but the fire grate combustion cannot reduce the gas volume infinitely to reduce the power, otherwise it will cause backfire.

[0042] The relevant technology uses segmented combustion to reduce the heat load of gas heating water heaters. However, segmented combustion has the risk of slow flame transmission and flame transmission failure; due to structural design reasons, the load ratio of segmented combustion technology has certain limitations. The inlet water temperature of bathrooms is generally high in summer. Even if the gas heating water heater with segmented combustion is insufficient in water pressure or in certain specific conditions, the outlet water temperature of the bathroom will be too hot.

[0043] In view of this, the present invention provides a temperature control method, device, gas water heater and storage medium, which can stabilize the actual water outlet temperature near the preset water outlet temperature by adjusting the burner of the gas water heater to a flameout-ignition-blank cycle without adding additional burner sectional valves and mixing valve components, thereby meeting the user's demand for bathroom water temperature; solves the problem of unstable bathroom water outlet temperature caused by high bathroom water inlet temperature in summer exceeding the temperature control range of the gas water heater, and at the same time increases the environmental adaptability of the gas water heater and broadens the range of constant temperature of the bathroom of the gas water heater.

[0044] like Figure 4As shown, the embodiment of the present invention provides a gas water heater, which is a gas heating water heater, comprising: a main heat exchanger 1, a heating water outlet pipe group 2, a sanitary water outlet pipe group 3, a sanitary water inlet pipe group 4, a heating water inlet pipe group 5, a plate heat exchanger 6 and a condensing heat exchanger 7. The main heat exchanger 1 is respectively connected to the heating water outlet pipe group 2, the heating water inlet pipe group 5 and the condensing heat exchanger 7; the plate heat exchanger 6 is respectively connected to the heating water outlet pipe group 2, the sanitary water outlet pipe group 3, the sanitary water inlet pipe group 4 and the heating water inlet pipe group 5. When the gas water heater is in the heating mode, the heated heating water flows out from the heating water outlet pipe group 2, flows to the heating terminal, and then flows back to the gas water heater from the heating water inlet pipe group 5. When the gas water heater is in bathroom mode, the heated heating water flows out from the heating water outlet pipe group 2, flows to the plate heat exchanger 6, and then flows back to the condensing heat exchanger 7 through the heating water inlet pipe group 5 for preheating. The preheated heating water flows to the main heat exchanger 1 for heating again, and the sanitary cold water flows into the plate heat exchanger 6 from the sanitary water inlet pipe group 4, exchanges heat with the heating water in the plate heat exchanger 6, and the heated sanitary water flows out from the sanitary water outlet pipe group 3 and flows to the bathroom terminal.

[0045] It can be understood that the gas water heating equipment in the present invention includes but is not limited to a gas heating water heater and a gas water heater.

[0046] Combine the following Figures 1 to 6 , describing an embodiment of the present invention.

[0047] According to an embodiment of the present invention, Figure 1 As shown, on the one hand, a temperature control method is provided, comprising the following steps:

[0048] Step S100: In response to the gas water heater being in the bathroom mode, the actual outlet water temperature, the preset outlet water temperature and the fluctuating temperature of the gas water heater are obtained.

[0049] In step S100, the actual outlet water temperature of the bathroom water flowing out of the bathroom terminal is detected by the temperature sensor, and the actual outlet water temperature detected by the temperature sensor is transmitted to the main controller of the gas water heater; the main controller then obtains the preset outlet water temperature and the fluctuation temperature set by the user for subsequent use. Among them, the preset outlet water temperature is the temperature set on the gas water heater; the fluctuation temperature is the upper limit temperature that the actual outlet water temperature of the bathroom water is allowed to rise.

[0050] Step S200: Calculate the target water outlet temperature based on the preset water outlet temperature and the fluctuation temperature.

[0051] In step S200, calculations can be performed according to actual usage requirements; for example, the preset water outlet temperature and the fluctuating temperature are summed to obtain the target water outlet temperature; if the preset water outlet temperature is 40°C and the fluctuating temperature is 3°C, the target water outlet temperature is 43°C. The preset water outlet temperature is greater than the fluctuating temperature. It is understood that the above temperature values ​​are exemplary, and the preset water outlet temperature and the fluctuating temperature can be set according to actual usage requirements.

[0052] Step S300: In response to the gas water heater being in the pulse combustion mode and the burner of the gas water heater being in the flameout state, when it is determined that the actual water outlet temperature is less than or equal to the target water outlet temperature, the burner is controlled to ignite until the actual water outlet temperature is greater than or equal to the preset water outlet temperature, then the burner is controlled to be extinguished and returns to execute the judgment that the actual water outlet temperature is less than or equal to the target water outlet temperature; wherein, the target water outlet temperature is greater than the preset water outlet temperature.

[0053] In step S300, when the gas water heater is in the pulse combustion mode, the burner of the gas water heater is controlled to be turned off, the actual outlet water temperature and the target outlet water temperature are compared by the main controller, and the working state of the gas water heater is controlled according to the comparison result to avoid the situation that the actual outlet water temperature of the bathroom water is unstable due to the temperature being too high or too low. For example, when the actual outlet water temperature is less than or equal to 43°C, the burner of the gas water heater is controlled to ignite and burn; instead of controlling the burner of the gas water heater to ignite and burn when the bathroom water temperature is lower than 40°C; by igniting in advance to avoid the rapid drop of the bathroom water temperature, the actual outlet water temperature of the bathroom water is effectively avoided from fluctuating greatly, thereby improving the user experience. If the actual outlet water temperature is greater than or equal to the preset outlet water temperature, in order to avoid the bathroom water temperature from continuing to rise, the burner of the gas water heater can be controlled to be turned off, and the residual heat of the heat exchanger is used to continue heating so that the temperature of the bathroom water meets the user's needs, thereby avoiding the excessive heat of the bathroom water outlet temperature caused by the continuous heat absorption of the heat exchanger. By continuously adjusting the working state of the burner of the gas water heater, the target water outlet temperature can be stabilized to avoid excessively high bathroom water temperature and meet the user's demand for hot water temperature.

[0054] In this embodiment, the actual temperature of the bathroom water flowing out of the gas water heater from the bathroom terminal, the preset water outlet temperature set by the user, and the fluctuating temperature are obtained; the target water outlet temperature is calculated by the preset water outlet temperature and the fluctuating temperature; when the gas water heater is in the pulse combustion mode, by comparing the actual water outlet temperature with the target water outlet temperature, if the actual water outlet temperature is less than or equal to the target water outlet temperature, the burner of the gas water heater is controlled to ignite to heat the bathroom water and increase the temperature of the bathroom water; when the actual water outlet temperature is greater than or equal to the preset water outlet temperature, the burner is controlled to ignite. The burner of the gas water heater is turned off, and the residual heat of the heat exchanger is used to continue heating the bathroom water so that the temperature of the bathroom water meets the user's needs, avoiding the heat exchanger from continuously absorbing heat and causing the bathroom water outlet temperature to be too hot. At the same time, the judgment that the actual outlet water temperature is less than or equal to the target outlet water temperature continues to be executed. Considering that there is a time delay between the ignition of the burner and the heating of the bathroom water in the heat exchanger, the target outlet water temperature is greater than the preset outlet water temperature. That is, before the bathroom water outlet temperature drops to the preset outlet water temperature, the burner of the gas water heater is controlled to ignite in advance to stabilize the actual outlet water temperature near the preset outlet water temperature. The present invention can stabilize the actual outlet water temperature near the preset outlet water temperature by adjusting the burner of the gas water heater to a flameout-ignition-extinguishing cycle without adding additional burner sectional valves and water mixing valve components, thereby meeting the user's demand for bathroom water temperature; it solves the problem of excessively hot bathroom water outlet temperature caused by high bathroom water inlet temperature in summer exceeding the temperature control range of the gas water heater, while increasing the environmental adaptability of the gas water heater and broadening the range of constant temperature in the bathroom of the gas water heater.

[0055] In this embodiment, if Figure 4 As shown, the gas water heating equipment is a gas heating water boiler; the above method also includes: in response to the gas water heating equipment being in a pulse combustion mode, controlling the water pump and the fan of the gas heating water boiler to be in an operating state, wherein when the water pump and the fan are in an operating state, the heating water sequentially enters the condensing heat exchanger 7, the main heat exchanger 1 and the plate heat exchanger 6 of the gas heating water boiler for heat exchange to heat the bathroom water.

[0056] In this embodiment, when the burner of the gas heating water heater is turned off, the water pump and fan of the gas heating water heater are still controlled to be in operation; when the water pump is running to make the water flow, the water flow signal can be detected by the sensor. After confirming that the water is flowing normally, the gas heating water heater believes that it has the basic conditions for ignition, thereby ensuring the safety and smooth progress of the ignition process. During the ignition process of the burner of the gas heating water heater, the fan needs to be pre-cleaned, that is, the combustible gas or exhaust gas that may remain in the combustion chamber is discharged to create a safe environment for ignition. The gas heating water heater will enter the ignition program only when the fan runs stably and the air environment in the combustion chamber meets the requirements. The continuous operation of the water pump and the fan makes sufficient preparations for early ignition, so that the gas heating water heater maintains the request ignition state; when the ignition conditions are met, the burner of the gas heating water heater is ignited immediately, so that the gas heating water heater can respond quickly when it needs to heat the bathroom water, further improving the user experience. Moreover, when the burner of the gas heating water heater is extinguished, the water pump is continuously controlled to operate, so that the water in the gas heating water heater can continue to flow in the heating internal circulation channel formed by the main heat exchanger 1, the condensing heat exchanger 7 and the plate heat exchanger 6, thereby utilizing the waste heat of the heating internal circulation water to continue to exchange heat with the bathroom water in the plate heat exchanger 6, transferring the heat to the bathroom water, so that the actual outlet water temperature of the bathroom water is still within the allowable temperature range, avoiding large fluctuations in the actual outlet water temperature of the bathroom water; it can also improve the overall efficiency of energy utilization.

[0057] In another embodiment, Figure 2 As shown, before step S300, the following steps are included:

[0058] Step S201: When the actual outlet water temperature is greater than or equal to the preset outlet water temperature, the gas water heater is controlled to enter the pulse combustion mode.

[0059] In this embodiment, the actual outlet water temperature of the bathroom water is continuously detected during the operation of the entire gas water heater. When the actual outlet water temperature of the bathroom water is greater than or equal to the preset outlet water temperature, it indicates that the bathroom water temperature meets the basic temperature requirements of the user. At this time, the gas water heater is controlled to enter the pulse combustion mode, which can ensure that the water temperature remains relatively stable after reaching the preset outlet water temperature, avoid large fluctuations in the water temperature, and improve the user's experience. It can also avoid excessive water temperature due to continuous heating, causing burns to the user, and ensure that the outlet water temperature does not exceed the safe range, thereby ensuring the user's safety.

[0060] In another embodiment, Figure 3 As shown, before step S300, it also includes:

[0061] Step S202: In response to the actual outlet water temperature being greater than or equal to the target outlet water temperature and lasting for a preset time, the gas water heater is controlled to enter a pulse combustion mode.

[0062] In this embodiment, since the target water outlet temperature is higher than the preset water outlet temperature, the actual water outlet temperature and the target water outlet temperature are further judged. When the actual water outlet temperature is greater than or equal to the target water outlet temperature, the gas water heater is controlled to enter the pulse combustion mode. The frequency of adjusting the working state of the gas water heater can be increased to stabilize the bathroom water near the preset water outlet temperature to improve the user's water use experience.

[0063] Further, in this embodiment, when the actual outlet water temperature of the bathroom water is greater than or equal to the target outlet water temperature, the preset duration of continuous combustion of the gas water heater is determined to ensure that the actual outlet water temperature of the bathroom water temporarily reaches the target outlet water temperature due to non-accidental factors; for example, changes in air temperature in the external environment, abnormalities in the burner in the gas water heater, and short-term errors in the temperature sensor due to electromagnetic interference. When the gas water heater continues to burn and meets the preset combustion duration, the gas water heater is controlled to enter the pulse combustion mode. When the actual outlet water temperature of the bathroom water meets the requirements, controlling the gas water heater to enter the pulse combustion mode can avoid energy waste caused by continuous high-load combustion. When the gas water heater is in the pulse combustion mode, the actual outlet water temperature of the bathroom water can be flexibly controlled to avoid the bathroom water temperature being too high or too low, thereby improving the user experience. Among them, the preset duration can be 5s-8s; for example, 5s, 6s, 7s, 8s, etc., which can be set according to actual needs.

[0064] Furthermore, in this embodiment, if Figure 3 As shown, in step S202, it also includes:

[0065] Determine whether the gas water heater is burning at the minimum load. If so, control the gas water heater to enter the pulse combustion mode.

[0066] In this embodiment, when the gas water heater has not yet entered the pulse combustion mode, it is determined whether the actual outlet water temperature of the bathroom water is greater than or equal to the target outlet water temperature; if the actual outlet water temperature of the bathroom water is greater than or equal to the target outlet water temperature, it is further determined whether the gas water heater is burning at the minimum load; to determine whether it is necessary to adjust the combustion load of the gas water heater, so as to achieve the purpose of accurate temperature control and energy saving. If the gas water heater burns at the minimum load, the duration of continuous combustion of the gas water heater at the minimum load is counted. By counting and analyzing the duration, the gas water heater can predict the trend of changes in the bathroom water temperature. If the continuous combustion time is long, the bathroom water temperature has a tendency to continue to rise, and the gas water heater enters the pulse combustion mode to prevent the bathroom water temperature from being too high and ensure that the bathroom water temperature can be relatively constant.

[0067] In one of the embodiments, the method further comprises: determining the fluctuating temperature based on the operation conditions of the flameout cycle and the ignition cycle of the gas water heater.

[0068] In this embodiment, the purpose of setting the fluctuating temperature is to determine whether the current demand load of the gas water heater is less than the minimum load. A judgment condition is added for the gas water heater to enter the standby working state, and reaching the preset time is a further judgment condition for confirming that the standby working state can be entered.

[0069] The value of the fluctuating temperature is related to the performance of the flameout cycle and the ignition cycle. Based on the performance of the flameout cycle and the ignition cycle, assuming that the heat transfer efficiency is 100% and other heat losses are 0, it can be seen that:

[0070] Q 总 =CMΔT=CM×(ΔT 升 +ΔT 降 )

[0071] Q 总 / t 总 =Q 散

[0072] Q 熄 =Q 散 t 熄

[0073] A=ΔT 降 =Q 熄 / CM=Q 散 ×t 熄 / CM

[0074] Among them, Q 总 is the total heat in the cycle; C is the specific heat capacity of water; M is the mass of water; ΔT 升 ΔT is the temperature difference from low temperature to high temperature before entering the standby working state; 降 is the temperature difference from high temperature to low temperature after entering the standby working state; t 总 is the cycle time; Q 熄 is the heat dissipation during the flameout cycle; Q 散 is the unit heat dissipation (Kw / s); t 熄 is the flameout time; A is the fluctuation temperature. The unit heat dissipation is different under different bathroom water flow rates.

[0075] The value of the fluctuation temperature A cannot be too small. Since the ignition of the gas water heater takes a certain amount of time, the gas water heater is always exchanging heat when it is in standby mode. If the fluctuation temperature is too small, the outlet water temperature of the bathroom water will be too low. The value of the fluctuation temperature A cannot be too large, otherwise the actual outlet water temperature of the gas water heater will exceed the set target outlet water temperature by too much, resulting in overheating of the water temperature.

[0076] According to an embodiment of the present invention, Figure 5 As shown, on the other hand, a temperature control device for a gas water heater is also provided, comprising:

[0077] An acquisition module 100 is used to acquire the actual outlet water temperature, the preset outlet water temperature and the fluctuating temperature of the gas water heater in response to the gas water heater being in the bathroom mode;

[0078] A calculation module 200, configured to calculate a target outlet water temperature based on a preset outlet water temperature and a fluctuating temperature;

[0079] The control module 300 is used to control the burner of the gas water heater to be turned off in response to the gas water heater being in the pulse combustion mode, and when it is judged that the actual water outlet temperature is less than or equal to the target water outlet temperature, control the burner to ignite until the actual water outlet temperature is greater than or equal to the preset water outlet temperature, then control the burner to be turned off and return to execute the judgment that the actual water outlet temperature is less than or equal to the target water outlet temperature; control the water pump and fan of the gas water heater to be in operation.

[0080] In one embodiment, the control module 300 includes:

[0081] The first control unit is used to control the gas water heater to enter a pulse combustion mode in response to an actual outlet water temperature being greater than or equal to a preset outlet water temperature.

[0082] In one embodiment, the control module 300 further includes:

[0083] The second control unit is used to control the gas water heater to enter a pulse combustion mode in response to the actual outlet water temperature being greater than or equal to the target outlet water temperature.

[0084] In one embodiment, the control module 300 further includes:

[0085] The third control unit is used to control the gas water heater to enter the pulse combustion mode in response to the actual outlet water temperature being greater than or equal to the target outlet water temperature and lasting for a preset time.

[0086] In one embodiment, the control module 300 further includes:

[0087] The fourth control unit is used to determine whether the gas water heater is burning at a minimum load, and if so, control the gas water heater to enter a pulse combustion mode.

[0088] In one embodiment, the acquisition module 100 further includes:

[0089] The acquisition unit is used to determine the fluctuating temperature based on the operation conditions of the flameout cycle and the ignition cycle of the gas water heater.

[0090] Figure 6 The hardware structure diagram of the gas water heater provided in the embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the gas water heater.

[0091] like Figure 6 As shown, the gas water heater may include: a processor (processor) 502 , a communications interface (Communications Interface) 504 , a memory (memory) 506 , and a communications bus 508 .

[0092] The processor 502, the communication interface 504, and the memory 506 communicate with each other via the communication bus 508. The communication interface 504 is used to communicate with other devices such as a client or other server network elements. The processor 502 is used to execute the program 510, which can specifically execute the relevant steps in the above-mentioned embodiment of the temperature control method.

[0093] Specifically, the program 510 may include program code including computer-executable instructions.

[0094] The processor 502 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the gas water heater may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0095] The memory 506 is used to store the program 510. The memory 506 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0096] The program 510 can be specifically called by the processor 502 to enable the gas water heater to execute the relevant steps in the above-mentioned embodiment of the temperature control method.

[0097] It can be understood by those skilled in the art that Figure 6 The structure shown is only for illustration and does not limit the structure of the above-mentioned equipment. Figure 6 More or fewer components as shown, or with Figure 6 Different configurations are shown.

[0098] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, 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 hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. 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.

[0099] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The specific contents of the above specific embodiments only express several embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A temperature control method, characterized in that: The method comprises: In response to the gas water heater being in the bathroom mode, obtaining the actual outlet water temperature, the preset outlet water temperature and the fluctuating temperature of the gas water heater; Based on the preset water outlet temperature and the fluctuating temperature, a target water outlet temperature is calculated; In response to the gas water heater being in the pulse combustion mode, the burner of the gas water heater is controlled to be extinguished, and when it is determined that the actual outlet water temperature is less than or equal to the target outlet water temperature, the burner is controlled to be ignited, until the actual outlet water temperature is greater than or equal to the preset outlet water temperature, the burner is controlled to be extinguished and the process returns to the execution of the determination that the actual outlet water temperature is less than or equal to the target outlet water temperature; Wherein, the target water outlet temperature is greater than the preset water outlet temperature.

2. The temperature control method according to claim 1, characterized in that: Before the step of responding to the gas water heater being in the pulse combustion mode, the step of: When the actual outlet water temperature is greater than or equal to the preset outlet water temperature, the gas water heater is controlled to enter the pulse combustion mode.

3. The temperature control method according to claim 1, characterized in that: Before the step of responding to the gas water heater being in the pulse combustion mode, the step of: When the actual outlet water temperature is greater than or equal to the target outlet water temperature, the gas water heater is controlled to enter the pulse combustion mode.

4. The temperature control method according to claim 1, characterized in that: Before the step of responding to the gas water heater being in the pulse combustion mode, the step of: When the actual outlet water temperature is greater than or equal to the target outlet water temperature and lasts for a preset time, the gas water heater is controlled to enter the pulse combustion mode.

5. The temperature control method according to claim 3 or 4, characterized in that: Before responding to the gas water heater being in the pulse combustion mode, the method further comprises: Determine whether the gas water heater is burning at a minimum load, and if so, control the gas water heater to enter the pulse combustion mode.

6. The temperature control method according to claim 1, characterized in that: The gas water heater is a gas heating water heater; the method further includes: in response to the gas water heater being in a pulse combustion mode, controlling the water pump and the fan of the gas heating water heater to be in an operating state, wherein when the water pump and the fan are in an operating state, the heating water sequentially enters the condensing heat exchanger, the main heat exchanger and the plate heat exchanger of the gas heating water heater for heat exchange to heat the bathroom water.

7. The temperature control method according to claim 1, characterized in that: The method further comprises: The fluctuation temperature is determined based on the operation conditions of the flameout cycle and the ignition cycle of the gas water heater.

8. A temperature control device for a gas water heater, characterized in that: include: An acquisition module, for acquiring, in response to the gas water heater being in a bathroom mode, an actual outlet water temperature, a preset outlet water temperature and a fluctuating temperature of the gas water heater; A calculation module, configured to calculate a target outlet water temperature based on the preset outlet water temperature and the fluctuating temperature; A control module is used to control the burner of the gas water heater to be turned off in response to the gas water heater being in a pulse combustion mode, and when it is judged that the actual water outlet temperature is less than or equal to the target water outlet temperature, control the burner to ignite until the actual water outlet temperature is greater than or equal to the preset water outlet temperature, then control the burner to be turned off and return to execute the judgment that the actual water outlet temperature is less than or equal to the target water outlet temperature.

9. A gas water heater, characterized in that: include: A memory, a processor, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the temperature control method according to any one of claims 1 to 7.

10. 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 processor to implement the temperature control method according to any one of claims 1 to 7 when executed.

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