Gas water heater control method and device, gas water heater and storage medium

Abstract

The invention discloses a gas water heater control method and device, a gas water heater and a storage medium, gas water heater comprises a gas heating module and an electric heating module, and when the water outlet temperature is equal to the set temperature, the first water inlet flow and the first water inlet temperature are recorded; the second water inlet flow and the second water inlet temperature are detected to calculate the water flow variable quantity and the water inlet temperature variable quantity, and the heating power of the gas heating module and the heating power of the electric heating module are adjusted according to the water flow variable quantity and the water inlet temperature variable quantity. The purpose that the outlet water temperature is equal to the set temperature is achieved by adjusting the heating power of the electric heating module and the fuel gas heating module, outlet water temperature control can be conducted on the small change scene of the inlet water flow and the inlet water temperature through the characteristics of small power and high sensitivity of the electric heating module, water temperature control is more precise, outlet water temperature fluctuation is reduced, and the service life is prolonged. The water temperature control of the gas water heater is more ideal, and the user experience of using the gas water heater is improved.

Description

Technical Field

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

[0002] Household gas water heaters heat water by burning gas. They are becoming more and more popular among household users because of their advantages of fast hot water output and immediate use.

[0003] In existing household gas water heaters, in order to solve the problem of outlet water temperature fluctuation caused by fluctuations in water inlet flow and water inlet temperature during the user's bathing process, a water flow servo is usually added to the gas water heater to stabilize the water inlet flow. However, the problem with this method is that during the use of the gas water heater, when the water inlet temperature drops or the user needs to adjust to a large amount of hot water, the water flow servo first reduces the water inlet flow to quickly increase the outlet water temperature, and then increases the heating power of the burner to reduce the outlet water temperature fluctuation; similarly, when the water inlet temperature rises or the user needs to adjust to a small amount of hot water, the water flow servo first increases the water inlet flow to quickly cool the outlet water temperature, and then reduces the heating power of the burner to reduce the outlet water temperature fluctuation; therefore, the flow fluctuation does not meet the user's hot water use needs, thereby reducing the user's hot water use experience. Summary of the invention

[0004] The present invention provides a gas water heater control method, device, gas water heater and storage medium to solve the problem that the flow fluctuation caused by using a water flow servo to adjust the water outlet temperature does not meet the user's hot water use demand and the user's hot water use experience is poor.

[0005] In a first aspect, the present invention provides a method for controlling a gas water heater, wherein the gas water heater comprises a gas heating module and an electric heating module, including:

[0006] After the gas water heater enters the working state from the standby state, when it is detected that the outlet water temperature is equal to the set temperature, the first inlet water flow rate and the first inlet water temperature are recorded;

[0007] Detecting a second water inlet flow rate and a second water inlet temperature in real time, and calculating an absolute value of a difference between the second water inlet flow rate and the first water inlet flow rate as a water flow change, and calculating an absolute value of a difference between the second water inlet temperature and the first water inlet temperature as a water inlet temperature change;

[0008] Adjusting the heating power of the gas heating module and the heating power of the electric heating module according to the change in water flow and the change in inlet water temperature;

[0009] Update the first water inlet flow rate and the first water inlet temperature, the updated first water inlet flow rate is equal to the second water inlet flow rate, the updated second water inlet temperature is equal to the second water inlet temperature, and return to the step of real-time detection of the second water inlet flow rate and the second water inlet temperature.

[0010] In a second aspect, the present invention provides a gas water heater control device, the gas water heater comprising a gas heating module and an electric heating module, including:

[0011] A first water inlet flow rate and water inlet temperature recording module, used for recording a first water inlet flow rate and a first water inlet temperature when it is detected that the outlet water temperature is equal to the set temperature after the gas water heater enters the working state from the standby state;

[0012] a water flow change and water inlet temperature change calculation module, used to detect a second water inlet flow rate and a second water inlet temperature in real time, and calculate an absolute value of a difference between the second water inlet flow rate and the first water inlet flow rate as a water flow change, and calculate an absolute value of a difference between the second water inlet temperature and the first water inlet temperature as a water inlet temperature change;

[0013] A power adjustment module, used for adjusting the heating power of the gas heating module and the heating power of the gas electric heating module according to the change in the water flow and the change in the inlet water temperature;

[0014] The first water inlet flow rate and water inlet temperature update module updates the first water inlet flow rate and the first water inlet temperature. The updated first water inlet flow rate is equal to the second water inlet flow rate, and the updated second water inlet temperature is equal to the second water inlet temperature. The water flow change and water inlet temperature change calculation module are returned.

[0015] In a third aspect, the present invention provides a gas water heater, the gas water heater comprising:

[0016] at least one processor; and

[0017] A memory, a water flow meter, a water inlet temperature sensor, a water outlet temperature sensor, a gas heating module and an electric heating module are communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor. The at least one processor can execute the gas water heater control method described in the first aspect.

[0019] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a processor to implement the gas water heater control method described in the first aspect when executed.

[0020] The gas water heater of the present invention comprises a gas heating module and an electric heating module, and records a first water inlet flow rate and a first water inlet temperature when the water outlet temperature is equal to a set temperature, and detects a second water inlet flow rate and a second water inlet temperature in real time to calculate a water flow change and a water inlet temperature change, and further adjusts the heating power of the gas heating module and the heating power of the electric heating module according to the water flow change and the water inlet temperature change, and updates the first water inlet flow rate and the first water inlet temperature with the second water inlet flow rate and the second water inlet temperature currently detected, so that after the water inlet flow rate and the water inlet temperature change, the purpose of achieving that the water outlet temperature is equal to the set temperature is achieved by adjusting the heating power of the electric heating module and the gas heating module, and the characteristics of low power and high sensitivity of the electric heating module can be utilized to control the water outlet temperature in scenarios where the water inlet flow rate and the water inlet temperature change slightly, so that the water temperature control is more precise, and the fluctuation of the water outlet temperature is reduced, and the water temperature control of the gas water heater is more ideal, and there is no need to adjust the water inlet flow rate first and then adjust the heating power of the burner through a water flow server to reduce the fluctuation of the water outlet temperature, which meets the user's demand for hot water and improves the user's experience in using the gas water heater.

[0021] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a flow chart of a gas water heater control method provided by Embodiment 1 of the present invention;

[0024] Figure 2 is a schematic diagram of a gas water heater according to an embodiment of the present invention;

[0025] Figure 3 is a flow chart of a gas water heater control method provided by Embodiment 2 of the present invention;

[0026] Figure 4 is a flow chart of an example of gas water heater control in an embodiment of the present invention;

[0027] Figure 5 It is a structural schematic diagram of a gas water heater control device provided by Embodiment 3 of the present invention;

[0028] Figure 6It is a structural block diagram of a gas water heater provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] Figure 1 This is a flow chart of a gas water heater control method provided in Embodiment 1 of the present invention. This embodiment is applicable to the case where a gas water heater with an electric heating module performs water temperature control. The method can be executed by a gas water heater control device, which can be implemented in the form of hardware and / or software and can be configured in a gas water heater. Figure 1 As shown, the gas water heater control method includes:

[0032] S101. After the gas water heater enters the working state from the standby state, when it is detected that the water outlet temperature is equal to the set temperature, a first water inlet flow rate and a first water inlet temperature are recorded.

[0033] like Figure 2 The figure shows a schematic diagram of a gas water heater according to an embodiment of the present invention. The gas water heater according to the embodiment of the present invention may include a gas heating module 1 and an electric heating module 2, and also includes a processor 3, a water inlet pipe 4 and a water outlet pipe 7. A water flow sensor 5 and a water inlet temperature sensor 6 are provided on the water inlet pipe 4, and an outlet water temperature sensor 8 is provided on the water outlet pipe 7. The electric heating module 2 may be provided on the water outlet pipe 7, and the water inlet pipe 4 is connected to the water outlet pipe 7 through the heat exchanger of the gas heating module 1, so that the cold water entering from the water inlet pipe 4 is heated after passing through the gas heating module 1, and hot water flows out from the water outlet pipe 7. The electric heating module 2 provided on the water outlet pipe 7 may heat the hot water in the water outlet pipe 7 to adjust the temperature. Among them, the gas heating module 1 can refer to a module that heats water after burning gas, the electric heating module 2 can refer to a module that heats water by electric energy, the water inlet temperature sensor 6 is used to detect the temperature of cold water flowing into the water inlet pipe 4, the water flow sensor 5 is used to detect the water flow rate of cold water in the water inlet pipe 4, the water outlet temperature sensor 8 is used to detect the temperature of hot water flowing out of the water outlet pipe 7, and the set temperature is the temperature set by the user.

[0034] The gas water heater enters the working state from the standby state, which may refer to the state after the gas heating module is ignited and burning. When the gas water heater enters the working state, the water outlet temperature can be detected by the water outlet temperature sensor. If the water outlet temperature is detected to be equal to the set temperature, it indicates that the current water outlet temperature reaches the user's expected water use temperature. The first water inlet flow detected by the water flow sensor and the first water inlet temperature detected by the water inlet temperature sensor can be recorded. That is, at the first water inlet flow and the first water inlet temperature, the water outlet temperature is equal to the set temperature when the gas water heater heats water with the current total heating power (including the heating power of the gas heating module and the electric heating module).

[0035] S102, detecting the second water inlet flow rate and the second water inlet temperature in real time, and calculating the absolute value of the difference between the second water inlet flow rate and the first water inlet flow rate as the water flow change, and calculating the absolute value of the difference between the second water inlet temperature and the first water inlet temperature as the water inlet temperature change.

[0036] After the outlet water temperature is equal to the set temperature, the water flow rate of cold water in the water inlet pipe can be detected in real time (for example, according to a preset period, such as an interval of 1s) by a water flow sensor as the second water inlet flow rate, and the temperature of cold water in the water inlet pipe can be detected in real time by an inlet water temperature sensor as the second water inlet temperature.

[0037] In order to monitor the water flow changes and temperature changes of cold water in the water inlet pipe, the water flow changes and temperature changes can be calculated based on the recorded first water inlet flow rate and the first water inlet temperature. Specifically, the absolute value of the difference between the second water inlet flow rate and the first water inlet flow rate can be calculated as the water flow change, and the absolute value of the difference between the second water inlet temperature and the first water inlet temperature can be calculated as the inlet temperature change.

[0038] S103, adjusting the heating power of the gas heating module and the heating power of the electric heating module according to the change in water flow and the change in inlet water temperature.

[0039] The water flow change and the water inlet temperature change measure the water inlet flow deviation and the water inlet temperature deviation. In an example, if the water flow change is less than the set water flow threshold or the water inlet temperature change is less than the set temperature threshold, it indicates that the water flow change is small or the water inlet temperature change is small, and the water inlet flow and water inlet temperature fluctuate slightly. The water outlet temperature can be adjusted by the electric heating module, for example, by increasing or decreasing the heating power of the electric heating module.

[0040] In another example, if the water flow change is greater than or equal to the set water flow threshold, or the water inlet temperature change is greater than or equal to the set temperature threshold, it indicates that the water inlet temperature change is large or the water inlet flow change is large, and the water inlet flow and water inlet temperature fluctuate greatly, which may exceed the adjustment range of the heating power of the electric heating module, and the water outlet temperature needs to be adjusted through the gas heating module, for example, increasing or decreasing the heating power of the gas heating module.

[0041] In another example, if the water flow change and the water inlet temperature change are both not 0, indicating that both the water inlet temperature and the water inlet flow rate have changed, it is necessary to calculate the required heating power through the second water inlet temperature, the second water inlet flow rate and the set temperature, and calculate the power deviation through the required heating power and the current total heating power. If the power deviation is within the adjustment range of the electric heating module, the electric heating module is used to adjust the water outlet temperature, otherwise the gas heating module is used to adjust the water outlet temperature.

[0042] S104, updating the first water inlet flow rate and the first water inlet temperature, wherein the updated first water inlet flow rate is equal to the second water inlet flow rate, and the updated second water inlet temperature is equal to the second water inlet temperature.

[0043] After adjusting the heating power through the electric heating module or the gas heating module to eliminate the influence of the water inlet flow and the water inlet temperature so that the water outlet temperature is constant at the user's set temperature, it is necessary to update the previously recorded first water inlet flow and the first water inlet temperature, that is, the updated first water inlet flow is equal to the second water inlet flow, and the updated second water inlet temperature is equal to the second water inlet temperature, and return to S102 to continue real-time detection of the second water inlet flow and the second water inlet temperature.

[0044] The embodiment of the present invention records the first water inlet flow rate and the first water inlet temperature when the outlet water temperature is equal to the set temperature, and detects the second water inlet flow rate and the second water inlet temperature in real time to calculate the water flow change and the water inlet temperature change, further adjusts the heating power of the gas heating module and the heating power of the electric heating module according to the water flow change and the water inlet temperature change, and updates the first water inlet flow rate and the first water inlet temperature with the currently detected second water inlet flow rate and the second water inlet temperature, so as to achieve the purpose of the outlet water temperature being equal to the set temperature by adjusting the heating power of the electric heating module and the gas heating module after the inlet water flow rate and the inlet water temperature change. The electric heating module and the gas heating module heat the water, and the outlet water temperature can be controlled in the scenario of slight changes in the inlet water flow rate and the inlet water temperature by utilizing the characteristics of low power and high sensitivity of the electric heating module. The water temperature control is more precise, and the fluctuation of the outlet water temperature is reduced. The water temperature control of the gas water heater is more ideal, and there is no need to adjust the inlet water flow rate first and then adjust the heating power of the burner through the water flow server to reduce the fluctuation of the outlet water temperature. The user's hot water use demand is met, and the user's experience of using the gas water heater is improved.

[0045] Embodiment 2

[0046] Figure 3 This is a flow chart of a gas water heater control method provided in Embodiment 2 of the present invention. This embodiment of the present invention is optimized based on Embodiment 1 above. Figure 3 As shown, the gas water heater control method includes:

[0047] S301, when the water inlet flow is detected in the standby state of the gas water heater, the electric heating module is controlled to operate at the maximum heating power, and the gas heating module is controlled to ignite and burn at the initial heating power.

[0048] The gas water heater of this embodiment is in standby mode after being powered on. When the user opens the water outlet valve to use water, the water flow sensor detects the water flow, the processor determines that the user is using water, and the processor controls the electric heating module to start and heat the water flowing out of the water outlet pipe with the maximum heating power to achieve zero cold water outlet, and controls the gas heating module to ignite and heat the cold water in the water inlet pipe with the initial heating power, wherein the initial heating power can be the default heating power of the gas heating module.

[0049] S302, detecting the outlet water temperature and the inlet water flow, and adjusting the heating power of the gas heating module and the heating power of the electric heating module according to the outlet water temperature, the set temperature and the inlet water flow, until the outlet water temperature is equal to the set temperature.

[0050] After the gas heating module is ignited, the outlet water temperature sensor detects the outlet water temperature, and the inlet water flow sensor detects the inlet water flow. The heating power of the gas heating module and the heating power of the electric heating module are adjusted according to the outlet water temperature, inlet water flow and the set temperature set by the user until the outlet water temperature is equal to the set temperature.

[0051] Specifically, when the outlet water temperature is lower than the set temperature, the difference between the set temperature and the outlet water temperature is calculated to determine whether the difference is greater than or equal to the preset value. If so, the heating power of the gas heating module is increased according to the outlet water temperature, the set temperature, the water inlet flow rate and the maximum heating power of the electric heating module. If not, the heating power of the electric heating module is reduced to a preset proportion of the maximum heating power, and the gas heating module is controlled to continue burning until the outlet water temperature is equal to the set temperature.

[0052] Exemplarily, when the outlet water temperature is lower than the set temperature, and the difference between the set temperature and the outlet water temperature is greater than or equal to 5°C, it indicates that the outlet water temperature is much lower than the set temperature. Since the electric heating module is already operating at the maximum heating power, the heating power of the gas heating module can be gradually increased to rapidly increase the outlet water temperature until the difference between the set temperature and the outlet water temperature is less than 5°C. The gas heating module is controlled to continue burning, and the heating power of the electric heating module is reduced to 50% of the maximum heating power until the outlet water temperature is equal to the set temperature. When the outlet water temperature is lower than the set temperature and the difference between the set temperature and the outlet water temperature is less than 5°C, the heating power of the electric heating module is reduced and the gas heating module is used to continue heating, so that the electric heating module always operates with the gas heating module at a lower power, and the electric heating module reserves heating power for adjusting the outlet water temperature when the subsequent inlet water flow or inlet water temperature fluctuates.

[0053] S303: After the gas water heater enters the working state from the standby state, when it is detected that the water outlet temperature is equal to the set temperature, the first water inlet flow rate and the first water inlet temperature are recorded.

[0054] When the gas water heater enters the working state, if it is detected that the water outlet temperature is equal to the set temperature, it indicates that the current water outlet temperature reaches the user's expected water temperature. The first water inlet flow detected by the water flow sensor can be recorded, as well as the first water inlet temperature detected by the water inlet temperature sensor.

[0055] S304, detecting the second water inlet flow and the second water inlet temperature in real time, and calculating the absolute value of the difference between the second water inlet flow and the first water inlet flow as the water flow change, and calculating the absolute value of the difference between the second water inlet temperature and the first water inlet temperature as the water inlet temperature change.

[0056] After the outlet water temperature is equal to the set temperature, the water flow change and temperature change can be monitored based on the first water inlet flow rate and the first water inlet temperature when the outlet water temperature reaches the set temperature. Specifically, the absolute value of the difference between the second water inlet flow rate and the first water inlet flow rate can be calculated as the water flow change, and the absolute value of the difference between the second water inlet temperature and the first water inlet temperature can be calculated as the water inlet temperature change.

[0057] S305: When the water flow change is less than the first water flow threshold, or the water inlet temperature change is less than the first temperature threshold, adjust the heating power of the electric heating module.

[0058] If the water flow change is less than the first water flow threshold, it indicates that the water flow rate of cold water at the water inlet pipe changes little. If the water inlet temperature change is less than the first temperature threshold, it indicates that the temperature of cold water at the water inlet pipe changes little. The outlet water temperature can be adjusted by the electric heating module, that is, the influence of small fluctuations in the water inlet flow and water inlet temperature on the initial temperature can be eliminated, so that the outlet water temperature is constant and equal to the set temperature.

[0059] In one embodiment, when the water inlet flow rate changes but the water inlet temperature remains unchanged, since the water flow change is a measure of the deviation between the second water inlet flow rate and the first water inlet flow rate, it cannot reflect the size relationship between the second water inlet flow rate and the first water inlet flow rate. In one example, when the water flow change is less than the first water flow threshold (for example, 1L / min), it can be further determined whether the second water inlet flow rate is greater than the first water inlet flow rate. If so, it is determined that the water inlet flow rate has increased, and the increase in the first electric heating power can be calculated based on the water flow change, and the heating power of the electric heating module can be increased by the first electric heating power increase. If not, it is determined that the water inlet flow rate has decreased, and the reduction in the first electric heating power can be calculated based on the water flow change, and the heating power of the electric heating module can be reduced by the first electric heating power reduction.

[0060] When the inlet water temperature remains unchanged and the water flow change is less than the first water flow threshold (such as 1L / min), the heating power of the electric heating module can be adjusted in the following two cases:

[0061] In case one, if the second water inlet flow rate is greater than the first water inlet flow rate, it means that the water inlet flow rate has increased. The first electric heating power increase can be calculated by the first water inlet temperature, the set temperature, the water flow change and the specific heat capacity of water. The first electric heating power increase can be increased on the basis of the current heating power of the electric heating module to increase the heating power of the electric heating module and avoid the outlet water temperature from decreasing due to the increase in the water inlet flow rate, so that the outlet water temperature can be kept constant and equal to the set temperature after the water inlet flow rate increases.

[0062] Case 2: If the second water inlet flow rate is less than the first water inlet flow rate, it means that the water inlet flow rate is reduced. The reduction in the first electric heating power can be calculated by the first water inlet temperature, the set temperature, the change in water flow and the specific heat capacity of water. The increase in the first electric heating power can be reduced on the basis of the current heating power of the electric heating module to reduce the heating power of the electric heating module and avoid overheating of the outlet water temperature due to the reduction in the water inlet flow rate. The outlet water temperature can be kept constant and equal to the set temperature after the water inlet flow rate is reduced.

[0063] In another embodiment, when the inlet water temperature changes but the inlet water flow rate remains unchanged, since the change in the inlet water temperature is a measure of the deviation between the second inlet water temperature and the first inlet water temperature, it cannot reflect the size relationship between the second inlet water temperature and the first inlet water temperature. In one example, when the change in the inlet water temperature is less than the first temperature threshold (for example, 2°C), it can be further determined whether the second inlet water temperature is greater than the first inlet water temperature. If so, it is determined that the inlet water temperature has increased, and the second electric heating power reduction can be calculated based on the inlet water temperature change, and the heating power of the electric heating module can be reduced by the second electric heating power reduction. If not, it is determined that the inlet water temperature has decreased, and the second electric heating power increase can be calculated based on the inlet water temperature change, and the heating power of the electric heating module can be increased by the second electric heating power increase.

[0064] When the inlet water flow rate remains unchanged and the inlet water temperature change is less than the first temperature threshold (for example, 2°C), the heating power of the electric heating module can be adjusted in the following two cases:

[0065] In case one, if the second inlet water temperature is greater than the first inlet water temperature, it means that the inlet water temperature has increased. The second electric heating power reduction can be calculated by the first inlet water flow rate, the inlet water temperature change and the specific heat capacity of water. The second electric heating power reduction can be reduced on the basis of the current heating power of the electric heating module to reduce the heating power of the electric heating module, thereby avoiding overheating of the outlet water temperature due to the increase in the inlet water temperature, and ensuring that the outlet water temperature can remain constant and equal to the set temperature after the inlet water temperature increases.

[0066] Case 2: If the second inlet water temperature is lower than the first inlet water temperature, it means that the inlet water temperature has decreased. The second electric heating power increase can be calculated based on the first inlet water flow rate, the change in inlet water temperature and the specific heat capacity of water. The second electric heating power increase can be increased on the basis of the current heating power of the electric heating module to increase the heating power of the electric heating module and avoid the outlet water temperature from decreasing due to the decrease in inlet water temperature. After the inlet water temperature is reduced, the outlet water temperature can still be kept constant and equal to the set temperature.

[0067] In the embodiment of the present invention, when the water flow change is less than the first water flow threshold, if the second water inlet flow is greater than the first water inlet flow, the heating power of the electric heating module is increased; if the second water inlet flow is less than the first water inlet flow, the heating power of the electric heating module is reduced; when the water inlet temperature change is less than the first temperature threshold, if the second water inlet temperature is greater than the first water inlet temperature, the heating power of the electric heating module is reduced; if the second water inlet temperature is less than the first water inlet temperature, the heating power of the electric heating module is increased. This achieves control of the outlet water temperature through the electric heating module when the water inlet flow or water inlet temperature fluctuates slightly. Due to the low power and sensitive heating characteristics of the electric heating module, fine temperature control of the outlet water temperature can be achieved when the water inlet flow or water inlet temperature fluctuates slightly, so that the outlet water temperature is constant and equal to the user's set temperature.

[0068] S306: When the water flow change is greater than or equal to the first water flow threshold, or the water inlet temperature change is greater than or equal to the first temperature threshold, adjust the heating power of the gas heating module.

[0069] If the water flow change is greater than or equal to the first water flow threshold (for example, 1L / min), it indicates that the water flow rate of cold water at the water inlet pipe has changed greatly. If the water inlet temperature change is greater than or equal to the first temperature threshold (for example, 2°C), it indicates that the temperature of cold water at the water inlet pipe has changed greatly. The electric heating module cannot be used to make the water outlet temperature equal to the set temperature, and the heating power of the gas heating module needs to be adjusted.

[0070] In one embodiment, when the water flow change is greater than or equal to the first water flow threshold (for example, 1 L / min), it can be further determined whether the second water inlet flow rate is greater than the first water inlet flow rate. If so, it can be determined that the water inlet flow rate is increased, and the first gas heating power increase is calculated according to the water flow change, and the heating power of the gas heating module is increased by the first gas heating power increase. If not, it is determined that the water inlet flow rate is reduced, and the first gas heating power reduction can be calculated according to the water flow change, and the heating power of the gas heating module can be reduced by the first gas heating power reduction. That is, when the water inlet temperature remains unchanged and the water flow change is greater than the first water flow threshold (for example, 1 L / min), the heating power of the gas heating module can be adjusted in the following two cases:

[0071] In case one, if the second water inlet flow rate is greater than the first water inlet flow rate, it means that the water inlet flow rate has increased significantly. The first gas heating power increase can be calculated by the first water inlet temperature, the set temperature, the water flow change and the specific heat capacity of water. The first gas heating power increase can be increased on the basis of the current heating power of the gas heating module to increase the heating power of the gas heating module and avoid the outlet water temperature from decreasing due to the increase in the water inlet flow rate, so that the outlet water temperature can be kept constant and equal to the set temperature after the water inlet flow rate increases.

[0072] In the second case, if the second water inlet flow rate is less than the first water inlet flow rate, it means that the water inlet flow rate has decreased significantly. The reduction in the first gas heating power can be calculated through the first water inlet temperature, the set temperature, the water flow change and the specific heat capacity of water. The increase in the first gas heating power can be reduced on the basis of the current heating power of the gas heating module to reduce the heating power of the gas heating module and avoid overheating caused by the increase in the outlet water temperature due to the reduction in the water inlet flow rate. After the water inlet flow rate is reduced, the outlet water temperature can still be kept constant and equal to the set temperature.

[0073] In another embodiment, when the change in water inlet temperature is greater than or equal to the first temperature threshold (for example, 2°C), it can be determined whether the second water inlet temperature is greater than the first water inlet temperature. If so, it is determined that the water inlet temperature has increased, and the second gas heating power reduction can be calculated according to the change in water inlet temperature, and the heating power of the gas heating module can be reduced by the second gas heating power reduction. If not, it is determined that the water inlet temperature has decreased, and the fourth gas heating power increase can be calculated according to the change in water inlet temperature, and the heating power of the gas heating module can be increased by the second gas heating power increase. That is, when the water inlet flow rate remains unchanged and the change in water inlet temperature is greater than or equal to the first temperature threshold (for example, 2°C), the heating power of the gas heating module can be adjusted in the following two cases:

[0074] In case one, if the second water inlet temperature is greater than the first water inlet temperature, it means that the water inlet temperature has risen significantly. The second gas heating power reduction can be calculated by the first water inlet flow, the change in water inlet temperature and the specific heat capacity of water. The second gas heating power reduction can be reduced on the basis of the current heating power of the gas heating module to reduce the heating power of the gas heating module and avoid overheating of the outlet water temperature due to the increase in the inlet water temperature. After the inlet water temperature rises, the outlet water temperature can still be kept constant and equal to the set temperature.

[0075] In the second case, if the second inlet water temperature is lower than the first inlet water temperature, it means that the inlet water temperature has dropped significantly. The second gas heating power increase can be calculated by the first inlet water flow rate, the change in inlet water temperature and the specific heat capacity of water. The second gas heating power increase can be increased on the basis of the current heating power of the gas heating module to increase the heating power of the gas heating module and avoid the outlet water temperature from dropping due to the drop in inlet water temperature. After the inlet water temperature drops, the outlet water temperature can still be kept constant and equal to the set temperature.

[0076] In the embodiment of the present invention, when the water flow change is greater than or equal to the first water flow threshold, if the second water inlet flow rate is greater than the first water inlet flow rate, the heating power of the gas heating module is increased; if the second water inlet flow rate is less than the first water inlet flow rate, the heating power of the gas heating module is reduced; when the water inlet temperature change is greater than or equal to the first temperature threshold, if the second water inlet temperature is greater than the first water inlet temperature, the heating power of the gas heating module is reduced; if the second water inlet temperature is less than the first water inlet temperature, the heating power of the gas heating module is increased, thereby achieving control of the outlet water temperature through the gas heating module when the water inlet flow rate or the water inlet temperature fluctuates greatly; due to the high power characteristic of the gas heating module, rapid temperature adjustment of the outlet water temperature can be achieved when the water inlet flow rate or the water inlet temperature fluctuates greatly, so that the outlet water temperature is constant and equal to the user's set temperature.

[0077] S307: When the water flow change and the water inlet temperature change are both not zero, the required heating power is calculated according to the second water inlet flow, the second water inlet temperature and the set temperature.

[0078] Specifically, if the water inlet flow rate and the water inlet temperature change at the same time, the required heating power can be calculated based on the detected second water inlet flow rate, the second water inlet temperature and the set temperature. For example, the temperature difference can be calculated using the second water inlet temperature and the set temperature, and the mass of water flowing into the water inlet pipe per unit time can be calculated using the second water inlet flow rate. The product of the temperature difference, the mass of water, the specific heat capacity and the heating efficiency of the gas water heater is calculated as the required heating power.

[0079] S308, calculating the sum of the current electric heating power of the electric heating module and the current gas heating power of the gas heating module to obtain the current total heating power.

[0080] Specifically, since the heating powers of the electric heating module and the gas heating module are controlled by the processor, the processor may sum the current electric heating power of the electric heating module and the current gas heating power of the gas heating module to obtain the current total heating power.

[0081] S309, calculating the absolute value of the difference between the required heating power and the current total heating power to obtain a total power deviation value.

[0082] The total power deviation value indicates the deviation between the required heating power and the current total heating power at the second inlet water temperature and the second inlet water flow rate, and the required heating power may be greater than the current total heating power or less than the current total heating power.

[0083] S310: When the total power deviation value is greater than the deviation threshold, the heating power of the electric heating module and the heating power of the gas heating module are adjusted according to the total power deviation value.

[0084] If the total power deviation value is greater than or equal to the deviation threshold, it means that the required heating power is too different from the current total heating power. Continuing to heat with the current total heating power will cause the outlet water temperature to fluctuate. It is necessary to adjust the heating power of the electric heating module and the heating power of the gas heating module. If the total power deviation value is less than the deviation threshold, it means that heating with the current total heating power can meet the heating power demand and the outlet water temperature will not fluctuate.

[0085] In one embodiment, if the total power deviation value is within the power adjustment range of the electric heating module, the heating power of the gas heating module is kept unchanged, and the heating power of the electric heating module is increased or decreased, wherein the amount of power increased or decreased is equal to the total power deviation value. For example, when the required power is greater than the current total heating power, the heating power of the electric heating module is increased, and when the required power is less than the current total heating power, the heating power of the electric heating module is decreased.

[0086] In another embodiment, if the total power deviation value is outside the power adjustment range of the electric heating module, the heating power of the electric heating module is kept unchanged, and the heating power of the gas heating module is increased or decreased, wherein the amount of power increased or decreased is equal to the total power deviation value. For example, when the required power is greater than the current total heating power, the heating power of the gas heating module is increased, and when the required power is less than the current total heating power, the heating power of the gas heating module is decreased.

[0087] In this embodiment, when it is detected that both the change in water flow and the change in water inlet temperature are not 0, that is, when the water inlet flow rate and the water inlet temperature change at the same time, the absolute value of the difference between the required heating power and the current total heating power is calculated to obtain the total power deviation value. When the total power deviation value is greater than the deviation threshold, the heating power of the electric heating module and the heating power of the gas heating module are adjusted according to the total power deviation value, so that the water inlet flow rate and the water inlet temperature change at the same time, and the water outlet temperature is adjusted according to the total power deviation value, so that the water outlet temperature can be kept constant at the set temperature.

[0088] S311. Update the first water inlet flow rate and the first water inlet temperature, wherein the updated first water inlet flow rate is equal to the second water inlet flow rate, and the updated second water inlet temperature is equal to the second water inlet temperature.

[0089] After adjusting the heating power through the electric heating module or the gas heating module to eliminate the influence of the inlet water flow and the inlet water temperature so that the outlet water temperature is constant at the user's set temperature, it is necessary to update the previously recorded first inlet water flow and the first inlet water temperature, that is, the updated first inlet water flow is equal to the second inlet water flow, and the updated second inlet water temperature is equal to the second inlet water temperature, and return to S304 to continue real-time detection of the second inlet water flow and the second inlet water temperature.

[0090] like Figure 4 The flowchart of an example of gas water heater control is shown as follows: Figure 4 As shown, the water inlet flow Q is detected in the standby state. If Q is greater than 0, it is determined that the user is using water. The electric heating module heats at the maximum power, controls the gas heating module to ignite and heat, and detects the water outlet temperature T. If T is less than T 设 -5, control the gas heating module to increase power and continue heating, if T is greater than T 设 -5 but not reaching T 设 , the power of the electric heating module is controlled to be reduced to 50% of the maximum heating power, and the gas heating module continues to heat. 设 After that, the water inlet flow rate and water inlet temperature are detected in real time. If the water inlet flow rate increases by 0.5-1L / min, or the water inlet temperature decreases by 1-2℃, only the heating power of the electric heating module is increased; if the water inlet flow rate decreases by 0.5-1L / min, or the water inlet temperature increases by 1-2℃, only the heating power of the electric heating module is reduced; if the water inlet flow rate increases by more than 1L / min, or the water inlet temperature decreases by more than 2℃, only the heating power of the gas heating module is increased; if the water inlet flow rate decreases by more than 1L / min, or the water inlet temperature increases by more than 2℃, only the heating power of the gas heating module is reduced.

[0091] After calculating the water flow change and the water inlet temperature change, this embodiment adjusts the heating power of the electric heating module when the water flow change is less than the first water flow threshold, or the water inlet temperature change is less than the first temperature threshold, and adjusts the heating power of the gas heating module when the water flow change is greater than or equal to the first water flow threshold, or the water inlet temperature change is greater than or equal to the first temperature threshold. This achieves that after the water inlet flow and water inlet temperature change, the water outlet temperature is adjusted by the electric heating module when the water inlet flow and water inlet temperature change is small. The low power and high sensitivity of the electric heating module are used to more precisely control the water temperature and reduce the fluctuation of the water outlet temperature. When the water inlet flow and water inlet temperature change is small, the water outlet temperature is quickly adjusted by the special effect of the high power of the gas heating module, so that the water temperature control of the gas water heater is more ideal, and there is no need to first adjust the water inlet flow through the water flow server and then adjust the heating power of the burner to reduce the fluctuation of the water outlet temperature. This meets the user's demand for hot water and improves the user's experience in using the gas water heater.

[0092] Embodiment 3

[0093] Figure 5 This is a schematic diagram of the structure of a gas water heater control device provided in Embodiment 3 of the present invention. Figure 5 As shown, the gas water heater control device comprises:

[0094] A first water inlet flow rate and water inlet temperature recording module 501, for recording a first water inlet flow rate and a first water inlet temperature when the outlet water temperature is detected to be equal to a set temperature after the gas water heater enters the working state from the standby state;

[0095] The water flow change and inlet water temperature change calculation module 502 is used to detect the second inlet water flow rate and the second inlet water temperature in real time, and calculate the absolute value of the difference between the second inlet water flow rate and the first inlet water flow rate as the water flow change, and calculate the absolute value of the difference between the second inlet water temperature and the first inlet water temperature as the inlet water temperature change;

[0096] The power adjustment module 503 is used to adjust the heating power of the gas heating module and the heating power of the gas electric heating module according to the change of water flow and the change of water inlet temperature;

[0097] The first water inlet flow rate and water inlet temperature update module 504 updates the first water inlet flow rate and the first water inlet temperature. The updated first water inlet flow rate is equal to the second water inlet flow rate, and the updated second water inlet temperature is equal to the second water inlet temperature. The water flow change and water inlet temperature change calculation module 502 is returned.

[0098] Optionally, also include:

[0099] The gas water heater start-up module is used to control the electric heating module to work at the maximum heating power and control the gas heating module to ignite and burn at the initial heating power when the water inlet flow is detected in the standby state of the gas water heater;

[0100] The outlet water temperature adjustment module is used to detect the outlet water temperature and the inlet water flow rate, and adjust the heating power of the gas heating module and the heating power of the electric heating module according to the outlet water temperature, the set temperature and the inlet water flow rate until the outlet water temperature is equal to the set temperature.

[0101] Optionally, the outlet water temperature adjustment module includes:

[0102] A temperature difference calculation unit, used to calculate the difference between the set temperature and the outlet water temperature, wherein the outlet water temperature is less than the set temperature;

[0103] A temperature difference judgment unit, used to judge whether the difference is greater than or equal to a preset value, if so, execute the first gas heating power adjustment unit, if not, execute the first electric heating power adjustment unit;

[0104] A first gas heating power adjustment unit, used to increase the heating power of the gas heating module according to the outlet water temperature, the set temperature, the inlet water flow rate and the maximum heating power of the electric heating module;

[0105] A first electric heating power adjustment unit, used to reduce the heating power of the electric heating module to a preset proportion of the maximum heating power;

[0106] The combustion control unit is used to control the gas heating module to continue burning until the outlet water temperature is equal to the set temperature.

[0107] Optionally, the power adjustment module 503 includes:

[0108] A second electric heating power adjustment unit, used to adjust the heating power of the electric heating module when the water flow change is less than the first water flow threshold, or the inlet water temperature change is less than the first temperature threshold;

[0109] The second gas heating power adjustment unit is used to adjust the heating power of the gas heating module when the water flow change is greater than or equal to the first water flow threshold, or the water inlet temperature change is greater than or equal to the first temperature threshold.

[0110] Optionally, the second electric heating power adjustment unit is specifically used for:

[0111] When the water flow change is less than the first water flow threshold, determining whether the second water inlet flow rate is greater than the first water inlet flow rate;

[0112] If so, it is determined that the water inlet flow rate increases, the first electric heating power increase amount is calculated according to the water flow change amount, and the heating power of the electric heating module is increased by the first electric heating power increase amount;

[0113] If not, determine that the water inlet flow rate is reduced, calculate the first electric heating power reduction amount according to the water flow change, and reduce the heating power of the electric heating module by the first electric heating power reduction amount;

[0114] When the change in the inlet water temperature is less than the first temperature threshold, determining whether the second inlet water temperature is greater than the first inlet water temperature;

[0115] If so, it is determined that the inlet water temperature increases, a second electric heating power reduction amount is calculated according to the inlet water temperature change, and the heating power of the electric heating module is reduced by the second electric heating power reduction amount;

[0116] If not, it is determined that the inlet water temperature is reduced, a second electric heating power increase is calculated according to the inlet water temperature change, and the heating power of the electric heating module is increased by the second electric heating power increase.

[0117] Optionally, the second gas heating power adjustment unit is specifically used for:

[0118] When the water flow change is greater than or equal to the first water flow threshold, determining whether the second water inlet flow rate is greater than the first water inlet flow rate;

[0119] If so, it is determined that the water inlet flow rate increases, the first gas heating power increase is calculated according to the water flow change, and the heating power of the gas heating module is increased by the first gas heating power increase;

[0120] If not, determine that the water inlet flow rate is reduced, calculate the first gas heating power reduction amount according to the water flow change, and reduce the heating power of the gas heating module by the first gas heating power reduction amount;

[0121] When the change in the inlet water temperature is greater than or equal to the first temperature threshold, determining whether the second inlet water temperature is greater than the first inlet water temperature;

[0122] If so, it is determined that the inlet water temperature increases, a second gas heating power reduction amount is calculated according to the inlet water temperature change, and the heating power of the gas heating module is reduced by the second gas heating power reduction amount;

[0123] If not, it is determined that the inlet water temperature is reduced, a fourth gas heating power increase is calculated according to the inlet water temperature change, and the heating power of the gas heating module is increased by the second gas heating power increase.

[0124] Optionally, the power adjustment module 503 further includes:

[0125] A required heating power calculation unit, used for calculating the required heating power according to the second inlet water flow rate, the second inlet water temperature and the set temperature when the water flow change amount and the inlet water temperature change amount are not zero;

[0126] A current total heating power calculation unit is used to calculate the sum of the current electric heating power of the electric heating module and the current gas heating power of the gas heating module to obtain the current total heating power;

[0127] A power deviation value calculation unit is used to calculate the absolute value of the difference between the required heating power and the current total heating power to obtain a total power deviation value;

[0128] The power adjustment unit is used to adjust the heating power of the electric heating module and the heating power of the gas heating module according to the total power deviation value when the total power deviation value is greater than the deviation threshold.

[0129] The gas water heater control device provided in the embodiment of the present invention can execute the gas water heater control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0130] Embodiment 4

[0131] Figure 6 FIG. 2 shows a schematic diagram of a gas water heater 60 that can be used to implement an embodiment of the present invention. Figure 6 As shown, the gas water heater 60 includes at least one processor 61, and a memory connected to the at least one processor 61, such as a read-only memory (ROM) 62, a random access memory (RAM) 63, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 61 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 62 or the computer program loaded from the storage unit 68 to the random access memory (RAM) 63. In the RAM 63, various programs and data required for the operation of the gas water heater 60 can also be stored. The processor 61, the ROM 62, and the RAM 63 are connected to each other through a bus 64. An input / output (I / O) interface 65 is also connected to the bus 64.

[0132] Multiple components in the gas water heater 60 are connected to the I / O interface 65, including: an input unit 66, such as a water flow sensor, a water inlet temperature sensor, a water outlet temperature sensor, etc.; an output unit 67, such as various types of displays, speakers, etc.; a storage unit 68, such as a register, etc.; a communication unit 69, such as a wireless communication transceiver, etc., the communication unit 69 allows the gas water heater 60 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks; a gas heating module, the gas heating module is used to receive instructions from the processor 61 to adjust the heating power; and an electric heating module, the electric heating module is used to receive instructions from the processor 61 to adjust the heating power.

[0133] The processor 61 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 61 include, but are not limited to, a central processing unit (CPU), a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 61 executes the various methods and processes described above, such as the gas water heater control method.

[0134] In some embodiments, the gas water heater control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 68. In some embodiments, part or all of the computer program may be loaded and / or installed on the gas water heater 60 via the ROM 62 and / or the communication unit 69. When the computer program is loaded into the RAM 63 and executed by the processor 61, one or more steps of the gas water heater control method described above may be performed. Alternatively, in other embodiments, the processor 61 may be configured to execute the gas water heater control method in any other appropriate manner (e.g., by means of firmware).

[0135] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0136] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0137] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, an electronic, magnetic, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0138] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0139] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas water heater control method, characterized in that: The gas water heater includes a gas heating module and an electric heating module, including: After the gas water heater enters the working state from the standby state, the first water inlet flow rate and the first water inlet temperature recorded when it is detected that the water outlet temperature is equal to the set temperature; Detecting a second water inlet flow rate and a second water inlet temperature in real time, and calculating an absolute value of a difference between the second water inlet flow rate and the first water inlet flow rate as a water flow change, and calculating an absolute value of a difference between the second water inlet temperature and the first water inlet temperature as a water inlet temperature change; Adjusting the heating power of the gas heating module and the heating power of the electric heating module according to the change in water flow and the change in inlet water temperature; Update the first water inlet flow rate and the first water inlet temperature, the updated first water inlet flow rate is equal to the second water inlet flow rate, the updated second water inlet temperature is equal to the second water inlet temperature, and return to the step of real-time detection of the second water inlet flow rate and the second water inlet temperature.

2. The gas water heater control method according to claim 1, characterized in that: Before recording the first water inlet flow rate and the first water inlet temperature when it is detected that the water outlet temperature is equal to the set temperature, the method further includes: When the water inflow is detected in the standby state of the gas water heater, the electric heating module is controlled to work at the maximum heating power, and the gas heating module is controlled to ignite and burn at the initial heating power; The outlet water temperature and the inlet water flow rate are detected, and the heating power of the gas heating module and the heating power of the electric heating module are adjusted according to the outlet water temperature, the set temperature and the inlet water flow rate until the outlet water temperature is equal to the set temperature.

3. The gas water heater control method according to claim 2, characterized in that: Adjusting the heating power of the gas heating module and the heating power of the electric heating module according to the outlet water temperature, the set temperature and the inlet water flow until the outlet water temperature is equal to the set temperature includes: Calculating a difference between the set temperature and the outlet water temperature, wherein the outlet water temperature is lower than the set temperature; Determine whether the difference is greater than or equal to a preset value; If yes, the heating power of the gas heating module is increased according to the outlet water temperature, the set temperature, the inlet water flow rate and the maximum heating power of the electric heating module; If not, reducing the heating power of the electric heating module to a preset proportion of the maximum heating power; The gas heating module is controlled to continue burning until the outlet water temperature is equal to the set temperature.

4. A gas water heater control method according to any one of claims 1 to 3, characterized in that: Adjusting the heating power of the gas heating module and the heating power of the electric heating module according to the change in water flow and the change in inlet water temperature includes: When the water flow change is less than a first water flow threshold, or the water inlet temperature change is less than a first temperature threshold, adjusting the heating power of the electric heating module; When the water flow change is greater than or equal to a first water flow threshold, or the water inlet temperature change is greater than or equal to a first temperature threshold, the heating power of the gas heating module is adjusted.

5. The gas water heater control method according to claim 4, characterized in that: When the water flow change is less than the first water flow threshold, or the water inlet temperature change is less than the first temperature threshold, adjusting the heating power of the electric heating module includes: When the water flow change is less than the first water flow threshold, determining whether the second water inlet flow rate is greater than the first water inlet flow rate; If so, it is determined that the water inlet flow rate increases, a first electric heating power increase is calculated according to the water flow change, and the heating power of the electric heating module is increased by the first electric heating power increase; If not, determine that the water inlet flow rate is reduced, calculate a first electric heating power reduction amount according to the water flow change, and reduce the heating power of the electric heating module by the first electric heating power reduction amount; When the change in the inlet water temperature is less than a first temperature threshold, determining whether the second inlet water temperature is greater than the first inlet water temperature; If so, it is determined that the inlet water temperature increases, a second electric heating power reduction amount is calculated according to the inlet water temperature change, and the heating power of the electric heating module is reduced by the second electric heating power reduction amount; If not, it is determined that the inlet water temperature is reduced, a second electric heating power increase is calculated according to the inlet water temperature change, and the heating power of the electric heating module is increased by the second electric heating power increase.

6. The gas water heater control method according to claim 4, characterized in that: When the water flow change is greater than or equal to the first water flow threshold, or the water inlet temperature change is greater than or equal to the first temperature threshold, adjusting the heating power of the gas heating module includes: When the water flow change is greater than or equal to the first water flow threshold, determining whether the second water inlet flow rate is greater than the first water inlet flow rate; If so, it is determined that the water inlet flow rate increases, the first gas heating power increase is calculated according to the water flow change, and the heating power of the gas heating module is increased by the first gas heating power increase; If not, determine that the water inlet flow rate is reduced, calculate the first gas heating power reduction amount according to the water flow change, and reduce the heating power of the gas heating module by the first gas heating power reduction amount; When the change in the inlet water temperature is greater than or equal to the first temperature threshold, determining whether the second inlet water temperature is greater than the first inlet water temperature; If so, it is determined that the inlet water temperature increases, a second gas heating power reduction amount is calculated according to the inlet water temperature change, and the heating power of the gas heating module is reduced by the second gas heating power reduction amount; If not, it is determined that the water inlet temperature is reduced, a fourth gas heating power increase is calculated according to the water inlet temperature change, and the heating power of the gas heating module is increased by the second gas heating power increase.

7. The gas water heater control method according to claim 4, characterized in that: The heating power of the gas heating module and the heating power of the electric heating module are adjusted according to the water flow change and the water inlet temperature change, and further comprising: When the water flow change and the water inlet temperature change are both not zero, calculating the required heating power according to the second water inlet flow, the second water inlet temperature and the set temperature; Calculating the sum of the current electric heating power of the electric heating module and the current gas heating power of the gas heating module to obtain the current total heating power; Calculating the absolute value of the difference between the required heating power and the current total heating power to obtain a total power deviation value; When the total power deviation value is greater than the deviation threshold, the heating power of the electric heating module and the heating power of the gas heating module are adjusted according to the total power deviation value.

8. A gas water heater control device, characterized in that: The gas water heater includes a gas heating module and an electric heating module, including: A first water inlet flow rate and water inlet temperature recording module, used for recording a first water inlet flow rate and a first water inlet temperature when it is detected that the outlet water temperature is equal to the set temperature after the gas water heater enters the working state from the standby state; a water flow change and water inlet temperature change calculation module, used to detect a second water inlet flow rate and a second water inlet temperature in real time, and calculate an absolute value of a difference between the second water inlet flow rate and the first water inlet flow rate as a water flow change, and calculate an absolute value of a difference between the second water inlet temperature and the first water inlet temperature as a water inlet temperature change; A power adjustment module, used for adjusting the heating power of the gas heating module and the heating power of the gas electric heating module according to the change in the water flow and the change in the inlet water temperature; The first water inlet flow rate and water inlet temperature update module updates the first water inlet flow rate and the first water inlet temperature. The updated first water inlet flow rate is equal to the second water inlet flow rate, and the updated second water inlet temperature is equal to the second water inlet temperature. The water flow change and water inlet temperature change calculation module are returned.

9. A gas water heater, characterized in that: Gas water heater includes: at least one processor; as well as A memory, a water flow meter, a water inlet temperature sensor, a water outlet temperature sensor, a gas heating module and an electric heating module are communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, the computer program is executed by the at least one processor, and the at least one processor can execute the gas water heater control method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the gas water heater control method according to any one of claims 1 to 7 when executed.

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