Control method and device of gas water heating equipment and storage medium

Abstract

The invention relates to the technical field of gas water heating equipment, and discloses a gas water heating equipment control method and device and a storage medium, and the gas water heating equipment control method comprises the steps that the bathroom water reserved preheating duration and the bathroom water reserved temperature of the gas water heating equipment are obtained; under the condition that the current bathroom water supply temperature is smaller than the bathroom water reserved temperature, the current input power of a first circulating water pump is controlled to be reduced in response to the situation that the bathroom water reserved preheating duration is not smaller than a first preset duration, and current input parameters of the stepping motor are adjusted so that the three-way valve can reduce the flow of hot water entering the heating water channel and increase the flow of hot water entering the heating circulating water path. By adjusting the input power of the first circulating water pump and the input parameters of the stepping motor, when a user uses bathroom hot water, the flow of hot water entering the heating water channel is controlled, the influence of heat loss caused by shunting of the heating water channel is reduced, the stability of the hot water in the heating circulating water channel is guaranteed, and the service life of the user is prolonged. Therefore, the stability of heating temperature is ensured.

Description

Technical Field

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

[0002] At present, gas water heating equipment such as wall-mounted boilers, because the wall-mounted boilers have two major functions, heating and bathroom, the realization of the bathroom function is usually achieved by setting a plate heat exchanger. The plate heat exchanger is provided with a heating water channel and a bathroom water channel. The heating water heated by the main heat exchanger of the wall-mounted boiler is divided into two paths, one of which enters the heating water channel of the plate heat exchanger to heat the bathroom water, and the other enters the heating terminal for heating. In the related art, when the wall-mounted boiler uses the heating and bathroom functions at the same time, especially the bathroom water preheating function, the bathroom water in the water channel between the bathroom water channel of the plate heat exchanger and the water point is preheated to achieve the effect of instant heating of the water at the water point. Since the heating circulating water and the bathroom cold water are heat exchanged in the plate heat exchanger, the other heating circulating water cannot meet the heating demand, resulting in poor heating stability of the heating terminal, affecting the user experience. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a control method for a gas water heater, which effectively solves the problem of poor heating temperature stability when using a bathroom water preheating function.

[0004] The above technical problems are solved by the following technical solutions:

[0005] A control method for a gas water heater, the gas water heater comprising a plate heat exchanger, a first circulation water pump, a three-way valve, a stepping motor, a heating return pipe and a heating outlet pipe; the plate heat exchanger comprises a bathroom water channel and a heating water channel, the first circulation is connected to the bathroom water channel, the heating return pipe and the heating outlet pipe are respectively connected to an external heating terminal to form a heating circulation water circuit; the three-way valve is respectively connected to the heating water channel and the heating circulation water circuit; the stepping motor is connected to the valve core of the three-way valve, and is used to distribute the hot water flow entering the heating water channel and the heating circulation water circuit;

[0006] The method comprises:

[0007] Obtain the scheduled preheating time and the scheduled temperature of the bathroom water of the gas water heater;

[0008] When the current bathroom water supply temperature in the gas water heater is lower than the bathroom water reservation temperature, controlling the first circulating water pump and the stepper motor to operate;

[0009] In response to the bathroom water preheating time being not less than a first preset time, the current input power of the first circulating water pump is controlled to be reduced, and the current input parameters of the stepper motor are adjusted to enable the three-way valve to reduce the hot water flow entering the heating water channel and increase the hot water flow entering the heating circulating water circuit.

[0010] Beneficial effects: When the user uses bathroom water, the first circulating water pump provides power to make the bathroom water flow in the bathroom water channel and exchange heat with the hot water flowing into the plate heat exchanger from the heating water channel in the plate heat exchanger; the stepper motor can control the rotation of the valve core of the three-way valve, thereby controlling the opening of the three-way valve to distribute the hot water flow entering the heating water channel and the heating circulating water circuit. When the user has a demand for preheating hot water, obtain the bathroom water reservation temperature of the gas water heater, that is, the user's expected water outlet temperature; compare the current bathroom water supply temperature in the gas water heater with the bathroom water reservation temperature. If the current bathroom water supply temperature is lower than the bathroom water reservation temperature, it indicates that the actual water outlet temperature has not reached the bathroom water reservation temperature. At this time, it is necessary to adjust the input power of the first circulation water pump and the input parameters of the stepper motor; obtain the bathroom water reservation preheating time of the gas water heater, and based on the comparison between the user's reservation preheating time and the preset time, as the bathroom water reservation preheating time increases, control the current input power of the first circulation water pump to decrease, and adjust the input parameters of the stepper motor to make the three-way valve reduce the hot water flow entering the heating water channel and increase the hot water flow entering the heating circulation water channel. For example, if the user's reservation preheating time is longer than the preset When the time is long, it means that the demand for hot water is not urgent at this time. At this time, the input power of the first circulating water pump can be reduced and the input parameters of the stepper motor can be adjusted to reduce the hot water flow rate in the bathroom water channel. At the same time, the hot water flow entering the heating water channel can be reduced and the hot water flow entering the heating circulating water circuit can be increased. By adjusting the input power of the first circulating water pump, the flow rate and flow of water in the bathroom water channel can be changed, thereby changing the heat exchange efficiency between cold water and hot water, thereby extending the preheating time of bathroom water, that is, the user expects to use hot water after the bathroom water preheating time has passed; on the other hand, it effectively reduces the influence of heat loss caused by the diversion of the heating water channel, and ensures that the hot water flow in the heating circulating water circuit between the gas hot water equipment and the heating terminal can meet the user's heating needs, thereby ensuring the stability of the heating temperature and effectively improving the user's experience.

[0011] In one embodiment, when the current bathroom water supply temperature in the gas water heater is lower than the bathroom water reservation temperature, the first circulating water pump and the stepper motor are controlled to operate, and then the steps include:

[0012] In response to the bathroom water scheduled preheating time being less than a first preset time, controlling the first circulating water pump to operate at a first input power;

[0013] In response to the bathroom water scheduled preheating time being greater than a first preset time and less than a second preset time, controlling the first circulating water pump to operate at a second input power, the second input power being less than the first input power;

[0014] In response to the bathroom water scheduled preheating time being greater than a second preset time, the first circulating water pump is controlled to operate at a third input power, where the third input power is less than the second input power.

[0015] Beneficial effect: When the bathroom water preheating time is less than the first preset time, since the first preset time is short, it means that the demand for hot water is urgent, so the bathroom hot water needs to quickly reach the bathroom water preset temperature. At this time, the first circulation water pump is controlled to operate with a first input power with a higher input power, thereby increasing the water flow rate in the bathroom water channel, thereby increasing the water flow in the bathroom water channel, allowing a large amount of bathroom hot water to fully exchange heat with the hot water in the heating water channel in a short time, so as to improve the heat exchange efficiency between the bathroom hot water and the hot water in the heating water channel, thereby quickly meeting the user's bathroom hot water usage needs.

[0016] When the bathroom water preheating time is longer than the first preset time and shorter than the second preset time, compared to the case where the bathroom water preheating time is shorter than the first preset time, since the bathroom hot water does not need to be used quickly, the first circulating water pump is controlled to work at the second input power which is smaller than the first input power. The bathroom hot water is exchanged with the hot water in the heating water channel at an appropriate speed, thereby ensuring that the bathroom hot water can reach the bathroom water preheating temperature while reducing the impact of unstable heating temperature caused by the diversion of the heating water channel, and saving a certain amount of energy consumption.

[0017] When the bathroom water preheating time is longer than the second preset time, compared with the two situations that the bathroom water preheating time is less than the first preset time and the bathroom water preheating time is greater than the first preset time and less than the second preset time, there is sufficient time for heat exchange between the bathroom hot water and the hot water in the heating water channel. Therefore, the first circulation water pump is controlled to operate at a third input power less than the second input power, thereby making full use of the longer bathroom hot water reservation time and reaching the bathroom water reservation temperature with the lowest energy consumption. While meeting the user's bathroom hot water needs, it reduces the impact of unstable heating temperature due to diversion of the heating water channel, thereby saving energy to the greatest extent.

[0018] In one embodiment, after controlling the current input power of the first circulating water pump to decrease and adjusting the current input parameters of the stepper motor so that the three-way valve reduces the hot water flow entering the heating water channel and increases the hot water flow entering the heating circulating water circuit, the method further includes:

[0019] In response to the current bathroom water supply temperature being greater than or equal to the bathroom water reservation temperature, determining whether the working time of the first circulating water pump meets the bathroom water reservation preheating time;

[0020] When the working time of the first circulating water pump is less than the scheduled preheating time of the bathroom water, the gas water heater is controlled to enter the insulation mode.

[0021] Beneficial effect: After the three-way valve reduces the flow of hot water entering the heating water channel, the current bathroom water supply temperature is detected in real time through the water outlet temperature sensor. When the current bathroom water supply temperature is greater than or equal to the bathroom water reservation temperature, it indicates that the bathroom hot water temperature meets the user's water demand; then it is judged whether the working time of the first circulation water pump meets the bathroom water reservation preheating time. If the working time of the first circulation water pump is less than the bathroom water reservation preheating time, the gas water heater can be controlled to enter the insulation mode and the user can be reminded that the current bathroom water supply temperature meets the bathroom water reservation temperature.

[0022] In one embodiment, the method further comprises:

[0023] When the gas hot water standby is in the insulation mode, determining whether the current bathroom water supply temperature is less than or equal to the target water supply temperature, and the target water supply temperature is less than the bathroom water reservation temperature;

[0024] In response to the current bathroom water supply temperature being less than or equal to the target water supply temperature, the current input power of the first circulation water pump and the current input parameters of the stepper motor are adjusted based on the bathroom water scheduled preheating time and the first preset time.

[0025] Beneficial effect: When the gas hot water standby is in the insulation mode, the current bathroom water supply temperature detected in real time is compared with the target water supply temperature. Since the target water supply temperature is lower than the bathroom water reservation temperature, when the current bathroom water supply temperature is lower than or equal to the target water supply temperature, it indicates that the current bathroom water supply temperature may not meet the bathroom water reservation temperature required by the user due to factors such as heat dissipation. It is further necessary to adjust the input power of the first circulation water pump and the input parameters of the stepper motor based on the bathroom water reservation preheating time to ensure that the user can use bathroom hot water of appropriate temperature after the bathroom water reservation preheating time.

[0026] In one embodiment, the method further comprises:

[0027] When the gas water heater is in the insulation mode or the heating mode, in response to the working time of the first circulating water pump satisfying the bathroom water preheating time, the gas water heater is controlled to exit the insulation mode or the heating mode.

[0028] Beneficial effect: When the gas water heater is in the insulation mode or heating mode, and when the working time of the first circulation water pump meets the scheduled preheating time of the bathroom water, by forcibly exiting the insulation mode or exiting the heating mode, it can avoid the waste of energy when the gas water heater is continuously in the heating or insulation state; and avoid excessive heating that causes aging of the components of the gas water heater, which helps to extend the life of the gas water heater.

[0029] In one embodiment, obtaining the scheduled preheating time and the scheduled temperature of the bathroom water of the gas water heater includes:

[0030] When the gas water heater is in the reservation mode, setting the bathroom water reservation preheating time and the bathroom water reservation temperature on the gas water heater and / or the mobile terminal;

[0031] When the working time of the first circulating water pump is less than the bathroom water scheduled preheating time, the bathroom water scheduled temperature is read, and it is determined whether the current bathroom water supply temperature meets the bathroom water scheduled temperature.

[0032] Beneficial effect: When the gas water heater is turned on and in the reservation mode, the bathroom water reservation preheating time is set on the gas water heater and / or the mobile terminal to improve the convenience of setting the bathroom water reservation preheating time. The working time of the first circulating water pump is further detected. When the working time of the first circulating water pump is less than the bathroom water reservation preheating time, the bathroom water reservation temperature is read and it is determined whether the current bathroom water supply temperature meets the reservation temperature, so as to adjust the operating parameters of the gas water heater according to the previous bathroom water supply temperature and the bathroom water reservation temperature.

[0033] In one embodiment, adjusting the input parameters of the stepper motor further comprises:

[0034] Based on the difference between the current bathroom water supply temperature and the bathroom water reservation temperature, the input power of the stepper motor is adjusted, and the stepper motor is controlled to rotate forward or reverse to distribute the hot water flow entering the heating water channel and the heating circulation water circuit based on the three-way valve.

[0035] Beneficial effect: According to the difference between the current bathroom water supply temperature and the bathroom water reservation temperature, the input power of the stepper motor is adjusted; when the difference is large, the input power of the stepper motor is adjusted, and the stepper motor is controlled to rotate forward or reverse to adjust the opening of the three-way valve, thereby increasing the hot water flow entering the heating water channel and reducing the hot water flow entering the heating circulation water circuit, ensuring the stability of the hot water in the heating water channel when the bathroom water is used, thereby ensuring the stability of the bathroom water temperature; similarly, when the difference is small, the input power of the stepper motor is adjusted, and the stepper motor is controlled to rotate forward or reverse to adjust the opening of the three-way valve, thereby reducing the hot water flow entering the heating water channel and increasing the hot water flow entering the heating circulation water circuit, reducing the impact of unstable heating temperature caused by bathroom water preheating.

[0036] On the other hand, the present invention also provides a control device for a gas water heater, comprising:

[0037] An acquisition module, used to acquire the bathroom water scheduled preheating time and bathroom water scheduled temperature of the gas water heater;

[0038] The adjustment module is used to control the operation of the first circulating water pump and the stepper motor when the current bathroom water supply temperature in the gas water heating equipment is lower than the bathroom water reservation temperature; in response to the bathroom water reservation preheating time being not less than the first preset time, control the current input power of the first circulating water pump to be reduced, and adjust the current input parameters of the stepper motor so that the three-way valve reduces the hot water flow entering the heating water channel and increases the hot water flow entering the heating circulating water circuit.

[0039] On the other hand, 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;

[0040] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the control method of the gas water heater as described above.

[0041] On the other hand, 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 enable a processor to implement the control method of the gas water heater as described above when executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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.

[0043] Figure 1 This is a schematic structural diagram of a gas water heater according to an embodiment of the present invention;

[0044] Figure 2 A schematic diagram of the three-dimensional structure of a waterway integrated module according to an embodiment of the present invention;

[0045] Figure 3 for Figure 2 A front view of a waterway integrated module shown;

[0046] Figure 4 for Figure 2 A top view of a waterway integrated module is shown;

[0047] Figure 5 for Figure 2 A left side view of a waterway integrated module shown;

[0048] Figure 6 for Figure 2 A rear view of a waterway integrated module is shown;

[0049] Figure 7 for Figure 2 A front view of a water circuit integrated module after removing the plate heat exchanger and the circulating water pump;

[0050] Figure 8 for Figure 2 An exploded view of a waterway integrated module is shown;

[0051] Fig. 9 for Figure 2 Another exploded view of the waterway integrated module shown;

[0052] Fig.10 A schematic diagram of the principle of a gas water heater according to an embodiment of the present invention;

[0053] Fig.11 A flow chart of a control method of a gas water heater according to an embodiment of the present invention;

[0054] Fig.12 A schematic flow chart of a control method for a gas water heater according to another embodiment of the present invention;

[0055] Fig.13A schematic flow chart of a control method for a gas water heater according to another embodiment of the present invention;

[0056] Fig.14 A schematic flow chart of a control method for a gas water heater according to another embodiment of the present invention;

[0057] Fig.15 A schematic flow chart of a control method for a gas water heater according to another embodiment of the present invention;

[0058] Fig.16 This is a schematic structural diagram of a control device for a gas water heater according to an embodiment of the present invention;

[0059] Fig.17 The figure is a schematic structural diagram of a gas water heater according to another embodiment of the present invention.

[0060] Description of reference numerals:

[0061] 1. Shell; 10. Water circuit integrated module; 11. Second circulating water pump; 111. Exhaust valve; 112. Pressure sensor; 113. Water flow sensor; 114. Pressure relief pipe; 115. Pressure relief valve; 12. First circulating water pump; 13. Stepper motor; 14. Plate heat exchanger; 15. First water circuit adapter; 151. Inlet water temperature sensor; 152. Heating return water inlet; 153. Bathroom water inlet; 154. Second water pump connection port; 155. First water pump connection port Inlet; 16. Second water circuit adapter; 161. Three-way valve connection port; 162. Heating water inlet; 163. Bathroom water outlet; 164. Outlet water temperature sensor; 165. Heating water outlet; 166. Cold water inlet; 17. Solenoid valve; 18. Manual water supply valve; 19. Three-way valve; 191. Heating water outlet pipe connection port; 20. Burner; 30. Fan; 40. Expansion water tank; 50. Secondary condensing heat exchanger; 60. Heating water outlet pipe; 70. Heating water return pipe. DETAILED DESCRIPTION

[0062] 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.

[0063] In the description of the present invention, it should be understood that the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first", "second", and "third" 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.

[0064] According to an embodiment of the present invention, Figures 2 to 10 As shown, on the one hand, a water circuit integration module 10 is provided for gas water heating equipment, including: a plate heat exchanger 14, a water circuit adapter and a first circulating water pump 12; the plate heat exchanger 14 includes a bathroom water channel; the water circuit adapter is provided with a first water pump connection port 155, and the opening direction of the first water pump connection port 155 is arranged along the length direction of the plate heat exchanger 14; the first circulating water pump 12 is connected to the water circuit adapter through the first water pump connection port 155, and the connection port of the first circulating water pump 12 is arranged side by side with the first water pump connection port 155 and is connected to the bathroom water channel.

[0065] In this embodiment, a water circuit adapter and a first circulating water pump 12 are integrated on a plate heat exchanger 14 to form a water circuit integrated module 10 for a gas water heater. A sanitary water channel is provided inside the plate heat exchanger 14 for supplying and circulating sanitary hot water. The water circuit adapter is provided with a first water pump connection port 155, and the opening of the first water pump connection port 155 is arranged along the length direction of the plate heat exchanger. The first circulating water pump 12 is connected to the water circuit adapter through the first water pump connection port 155, and the connection port of the first circulating water pump 12 is arranged side by side with the first water pump connection port 155, and then communicated with the sanitary water channel; thereby, the first circulating water pump 12 is installed on the side or back of the plate heat exchanger 14 along the length direction of the plate heat exchanger 14, optimizing the spatial layout of the water circuit integrated module 10 in the gas water heater, thereby reducing the overall size of the gas water heater.

[0066] In one of the embodiments, it also includes a second circulating water pump 11; the plate heat exchanger 14 also includes a heating water channel; the water circuit adapter is also provided with a second water pump connecting port 154, and the opening of the second water pump connecting port 154 is arranged along the length direction of the plate heat exchanger 14; the second circulating water pump 11 is connected to the water circuit adapter through the second water pump connecting port 154, and the connecting port of the second circulating water pump 11 is arranged side by side with the second water pump connecting port 154 and is connected to the heating water channel.

[0067] In this embodiment, a second circulating water pump 11 is also integrated on the plate heat exchanger 14. The waterway adapter is provided with a second water pump connection port 154, and the opening of the second water pump connection port 154 is arranged along the length direction of the plate heat exchanger 14. The second circulating water pump 11 is connected to the waterway adapter through the second water pump connection port 154, and the connection port of the second circulating water pump 11 is arranged side by side with the second water pump connection port 154, and then communicated with the heating water channel to ensure that hot water can smoothly enter the heating water channel from the second circulating water pump 11 to participate in the heating cycle. Moreover, the connection port of the second circulating water pump 11 is arranged side by side with the second water pump connection port 154, and the second circulating water pump 11 can also be installed on the side or back of the plate heat exchanger 14 along the length direction of the plate heat exchanger 14, thereby optimizing the spatial layout of the waterway integrated module 10 in the gas water heater, reducing the thickness of the waterway integrated module 10 in the width direction, and thus reducing the overall size of the gas water heater. By simultaneously providing a heating water channel and a bathroom water channel in the plate heat exchanger 14, the gas water heater can have both a heating function and a bathroom function, thereby improving the practicality of the gas water heater.

[0068] In one embodiment, the water channel adapter includes a first water channel adapter 15 and a second water channel adapter 16, and the first water channel adapter 15 and the second water channel adapter 16 are respectively arranged on the left and right sides of the plate heat exchanger 14; the first water channel adapter 15 is provided with a bathroom water inlet 153 and a heating return water inlet 152, and the second water channel adapter 16 is provided with a bathroom water outlet 163 and a heating water inlet 162.

[0069] In this embodiment, the water circuit adapter is composed of a first water circuit adapter 15 and a second water circuit adapter 16, which are respectively located on the left and right sides of the plate heat exchanger 14. The first water circuit adapter 15 is provided with a bathroom water inlet 153 and a heating water return port 152, and the second water circuit adapter 16 is provided with a bathroom water outlet 163 and a heating water inlet 162; the bathroom cold water entering from the cold water inlet 166 will first enter the bathroom water channel of the plate heat exchanger 14 through the bathroom water inlet 153 of the first water circuit adapter 15, and after heat exchange in the bathroom water channel of the plate heat exchanger 14, it will flow out from the bathroom water outlet 163 to be used by the user; similarly, the high-temperature hot water used for heating enters the heating water channel of the plate heat exchanger 14 from the heating water inlet 162, and after the heating cycle and heat exchange with the bathroom cold water, the water with reduced temperature returns to the first water circuit adapter 15 through the heating water return port 152.

[0070] In one embodiment, the first water circuit adapter 15 is provided with a second water pump connection port 154 and a first water pump connection port 155, or the second water circuit adapter 16 is provided with a second water pump connection port 154 and a first water pump connection port 155, or the first water circuit adapter 15 is provided with the second water pump connection port 154 and the second water circuit adapter 16 is provided with the first water pump connection port 155, or the first water circuit adapter 15 is provided with the first water pump connection port 155 and the second water circuit adapter 16 is provided with the second water pump connection port 154.

[0071] In this embodiment, the second water pump connection port 154 and the first water pump connection port 155 have multiple situations. The second water pump connection port 154 and the first water pump connection port 155 can be set on the first water circuit adapter 15; or, the second water pump connection port 154 and the first water pump connection port 155 are set on the second water circuit adapter 16, so that the second circulating water pump 11 and the first circulating water pump 12 are connected to one side of the first water circuit adapter 15 or to one side of the second water circuit adapter 16, so as to centrally manage and wire the second circulating water pump 11 and the first circulating water pump 12. Further, the second water pump connection port 154 can be set on the first water circuit adapter 15, and the first water pump connection port 155 can be set on the second water circuit adapter 16; or, the first water pump connection port 155 can be set on the first water circuit adapter 15, and the second water pump connection port 154 can be set on the second water circuit adapter 16. Thus, the second circulating water pump 11 and the first circulating water pump 12 can be more evenly distributed in the water channel integrated module 10 to optimize the overall layout of the water channel integrated module 10. The specific arrangement of the second water pump connection port 154 and the first water pump connection port 155 can be selected according to actual use requirements.

[0072] In one embodiment, the center of the bathroom water inlet 153 is at the same height as the center of the heating water inlet 162 , and the center of the heating water return port 152 is at the same height as the center of the bathroom water outlet 163 .

[0073] In this embodiment, by setting the center of the bathroom water inlet 153 and the center of the heating water inlet 162 at the same height, and setting the center of the heating return water inlet 152 and the center of the bathroom water outlet 163 at the same height, it is convenient to plan the heating water channel and the bathroom water channel, improve the integration of the waterway integration module 10, and facilitate later maintenance. Moreover, since the bathroom water inlet 153 and the heating water inlet 162 are at the same height, hot water and cold water can be distributed and flow in the plate heat exchanger 14 in a more uniform manner, thereby improving the heat exchange efficiency. For example, during the heat exchange process, water inlet at the same height can make hot water and cold water form a more stable convection in the plate heat exchanger 14, increase the contact area and contact time of hot water and cold water, and thus improve the heat exchange efficiency.

[0074] In one of the embodiments, it also includes a stepper motor 13, a three-way valve 19, a heating return pipe 70 and a heating outlet pipe 60, the heating return pipe 70 and the heating outlet pipe 60 are respectively connected to the external heating terminal to form a heating circulation water circuit; the second water circuit adapter 16 is provided with a three-way valve connection port 161, and the opening of the three-way valve connection port 161 is arranged along the length direction of the plate heat exchanger 14; the outlet of the three-way valve 19 is arranged side by side with the three-way valve connection port 161 and is connected to the heating water channel; the three-way valve 19 is also provided with a heating outlet pipe connection port 191 and a heating outlet 165, so that the three-way valve 19 is connected to the heating outlet pipe 60, and the stepper motor 13 is connected to the valve core of the three-way valve 19, which is used to distribute the hot water flow entering the heating water channel and the heating circulation water circuit.

[0075] In this embodiment, a three-way valve connection port 161 is provided on the second water circuit adapter 16, and the opening of the three-way valve connection port 161 is arranged along the length direction of the plate heat exchanger 14, so that the three-way valve 19 can be integrated on the side of the plate heat exchanger 14, thereby further optimizing the spatial layout of the water circuit integration module 10. The outlet of the three-way valve 19 is arranged side by side with the three-way valve connection port 161 and connected to the heating water channel, and the heating water outlet pipe connection port 191 is connected to the heating water outlet pipe 60, so that the three-way valve 19 can distribute and adjust the hot water flow in the heating water channel and the heating circulation water circuit. The stepper motor 13 is arranged on the side of the plate heat exchanger 14 and is connected to the valve core of the three-way valve 19. The stepper motor 13 drives the rotation of the valve core of the three-way valve 19 to flexibly adjust the hot water flow in the heating water channel according to actual needs, so as to ensure that the heating system can operate efficiently and stably, and can also achieve a good balance between the water used for heating and the water used for bathrooms, avoiding various problems caused by unreasonable hot water distribution. For example, when the stepper motor 13 rotates a certain angle to rotate the valve core of the three-way valve 19, the opening size of the three-way valve 19 will change accordingly. If the opening is increased, more hot water can enter the heating water channel to improve the heat exchange efficiency with the cold water in the bathroom water channel, and quickly increase the temperature of the bathroom water, thereby meeting the situation of using a large amount of bathroom hot water and using bathroom water at a higher temperature.

[0076] In one of the embodiments, it also includes an exhaust valve 111, a pressure sensor 112, a pressure relief valve 115 and a pressure relief pipe 114, all of which are integrated on the heating water channel.

[0077] Specifically, the pressure sensor 112 is used to detect the water pressure in the heating water channel; when the pressure in the heating water channel exceeds the opening pressure set by the pressure relief valve 115, the pressure relief valve 115 is opened to allow the water in the heating water channel to flow out from the pressure relief pipe 114; and when the pressure drops to a safe range, the pressure relief valve 115 will automatically close to protect the safety of the hot water equipment. When the heating water channel is initially filled with water or during operation, the air dissolved in the water will escape to form bubbles. If bubbles gather in the heating water channel, it will affect the normal flow of the heating water and reduce the heating efficiency. By opening the exhaust valve 111 to discharge the air in the heating water channel, the unobstructed heating water channel is ensured, which is conducive to improving the heating efficiency.

[0078] In one embodiment, a solenoid valve 17 and a manual water replenishment valve 18 are also included, both of which are arranged on the second water channel adapter 16. During the operation of the gas water heater, the water pressure of the heating water channel is detected by the pressure sensor 112; when the water pressure in the heating water channel is too low, the main controller sends a signal to control the solenoid valve 17 to work, so as to replenish the heating water channel. In the case of failure of the solenoid valve 17, the manual water replenishment valve 18 can be manually opened to replenish the heating water channel, so as to avoid the failure of the solenoid valve 17 to replenish the heating water channel.

[0079] In one of the embodiments, it also includes an inlet water temperature sensor 151 and an outlet water temperature sensor. The inlet water temperature sensor is arranged on the first water circuit adapter 15 and is arranged at the heating return water inlet 152; the outlet water temperature sensor 164 is arranged on the second water circuit adapter 16 and is arranged at the bathroom water outlet 163.

[0080] In this embodiment, by setting the water inlet temperature sensor 151 at the heating return water port 152 on the first water circuit adapter 15, the temperature of the water returned from the heating water channel can be directly measured. During the heating cycle, the water temperature will change after the hot water releases heat through the heating cycle. By measuring the water temperature at the heating return water port 152, the gas water heater can accurately understand the residual heat of the hot water after a heating cycle. The water outlet temperature sensor 164 is set at the bathroom water outlet 163 on the second water circuit adapter 16, and the bathroom hot water temperature provided to the user can be detected in real time. For example, when the user turns on the shower head or faucet, the water outlet temperature sensor 164 can quickly sense the water temperature. If the water temperature does not meet the temperature requirements set by the user, the system can adjust the heating power or the ratio of mixed cold and hot water in time to ensure that the user can use hot water with a comfortable temperature. Through the data detected by the water inlet temperature sensor 151 and the water outlet temperature sensor 164, the control system of the gas water heater can be intelligently adjusted to enhance the user experience. For example, when the water inlet temperature sensor 151 detects that the water temperature at the heating return water port 152 is low, the control system can increase the power of the burner 20 or adjust the circulation speed of the hot water in the water system to improve the heating efficiency. For the water outlet temperature sensor 164, when it detects that the water temperature at the bathroom water outlet 163 is lower than the user's requirement, the system can start the heating device or adjust the mixing ratio of hot water and cold water to ensure that the user can obtain the hot water temperature that meets the user's expectations.

[0081] In one embodiment, a water flow sensor 113 is further included, which is integrated on the first water channel adapter 15 and is used to detect the water flow flowing through the bathroom water channel.

[0082] On the other hand, Figure 1 , Fig.10 As shown, an embodiment of the present invention further provides a gas water heater, comprising: a shell 1; an expansion water tank 40, a fan 30, a burner 20, a secondary condensing heat exchanger 50 and a water circuit integrated module 10, all of which are arranged in the shell 1; the water circuit integrated module 10, the burner 20 and the fan 30 are arranged in sequence from bottom to top along the height direction of the shell 1; the expansion water tank 40 and the stepper motor 13 are located on the same side of the shell 1, and the expansion water tank 40 is located on the upper side of the stepper motor 13; the secondary condensing heat exchanger 50 is arranged between the expansion water tank 40 and the fan 30; the plate heat exchanger 14 is close to the front side wall of the shell 1.

[0083] In this embodiment, the water circuit integrated module 10 is arranged at the bottom of the gas water heater, and the burner 20 and the fan 30 are arranged in sequence from bottom to top along the height direction of the shell 1, and the fan 30 is close to the inner wall of the shell 1. Then the expansion tank 40 and the stepper motor 13 in the water circuit integrated module 10 are arranged on the same side of the shell 1, and the expansion tank 40 is arranged on the upper side of the stepper motor 13; a secondary condensing heat exchanger 50 is arranged between the expansion tank 40 and the fan 30, so that the spatial layout of each component in the shell 1 is more reasonable, effectively improving the space utilization rate in the shell 1, and facilitating the reduction of the overall volume of the gas water heater. Further, the plate heat exchanger 14 is arranged close to the front side wall of the shell 1, so that the plate heat exchanger 14 can be operated more easily during the maintenance and overhaul of the gas water heater, reducing the interference of maintenance personnel with other components inside the gas water heater, and there is no need to disassemble other components in large quantities, thereby improving the convenience of maintenance.

[0084] It can be understood that the gas water heater provided by the present invention can be but is not limited to a wall-mounted boiler or a gas water heater.

[0085] On the other hand, Fig.11 As shown, the embodiment of the present invention also provides a control method for a gas water heater, which is applied to the above gas water heater; the method comprises the following steps:

[0086] Step S100, obtaining the bathroom water preheating time and bathroom water preheating temperature of the gas water heater;

[0087] Step S200, when the current bathroom water supply temperature in the gas water heater is lower than the bathroom water reservation temperature, control the first circulating water pump and the stepper motor to operate; in response to the bathroom water reservation preheating time being not less than the first preset time, control the current input power of the first circulating water pump 12 to be reduced, and adjust the current input parameters of the stepper motor 13 to enable the three-way valve 19 to reduce the hot water flow entering the heating water channel and increase the hot water flow entering the heating circulating water circuit.

[0088] In this embodiment, when the user makes an appointment for bathroom water use, the bathroom water preheating time of the gas water heater is obtained. According to the comparison between the user's preheating time and the preset time, as the bathroom water preheating time increases, the current input power of the first circulating water pump 12 is controlled to decrease, and the input parameters of the stepper motor 13 are adjusted to make the three-way valve 19 reduce the hot water flow entering the heating water channel and increase the hot water flow entering the heating circulating water circuit. For example, when the user's preheating time is longer than the preset time, it means that the demand for hot water is not urgent at this time. In this case, the input power of the first circulating water pump 12 can be reduced and the input parameters of the stepper motor 13 can be adjusted to make the hot water in the bathroom water channel The flow rate is reduced, and at the same time, the hot water flow entering the heating water channel is reduced while the hot water flow entering the heating circulation water circuit is increased. By adjusting the input power of the first circulation water pump, the flow rate and flow of water in the bathroom water channel can be changed, thereby changing the heat exchange efficiency between cold water and hot water, thereby extending the preheating time of bathroom water, that is, users expect to use hot water after the scheduled preheating time of bathroom water; on the other hand, it effectively reduces the impact of heat loss caused by the diversion of the heating water channel, and ensures that the hot water flow in the heating circulation water circuit between the gas water heater and the heating terminal can meet the user's heating needs, thereby ensuring the stability of the heating temperature and effectively improving the user's experience.

[0089] like Fig.12 As shown, in one embodiment, step S200 includes the following steps:

[0090] Step S210: In response to the bathroom water preheating time being less than the first preset time, the first circulating water pump 12 is controlled to operate at the first input power.

[0091] In step S210, when the bathroom water preheating time is less than the first preset time, since the first preset time is short, it means that the demand for hot water is urgent, so it is necessary to make the bathroom hot water quickly reach the bathroom water preset temperature. At this time, the first circulating water pump 12 is controlled to work at the first input power with a higher input power, so as to increase the water flow rate in the bathroom water channel, thereby increasing the water flow in the bathroom water channel, so that the bathroom hot water can fully exchange heat with the hot water in the heating water channel in a short time, so as to improve the heat exchange efficiency between the bathroom hot water and the hot water in the heating water channel, so as to quickly meet the user's bathroom hot water use needs. Among them, the first input power can be 100%, 90%, 80% of the input power of the first circulating water pump 12, etc.; the first preset time can be 4 minutes, 5 minutes, 6 minutes, etc.; the first input power and the first preset time can be set according to the actual use needs, and there is no specific restriction.

[0092] Step S220: In response to the bathroom water preheating time being greater than the first preset time and less than the second preset time, the first circulating water pump 12 is controlled to operate at a second input power that is less than the first input power.

[0093] In step S220, when the bathroom water preheating time is greater than the first preset time and less than the second preset time, compared with the case where the bathroom water preheating time is less than the first preset time, since the bathroom hot water does not need to be used quickly, the first circulating water pump 12 is controlled to work at a second input power less than the first input power. Heat exchange between bathroom hot water and hot water in the heating water channel is performed at an appropriate speed, thereby ensuring that the bathroom hot water can reach the bathroom water preheating temperature while reducing the impact of unstable heating temperature caused by the diversion of the heating water channel, and saving a certain amount of energy consumption. Among them, the second input power can be 70%, 65%, 60%, etc. of the input power of the first circulating water pump 12; the second preset time can be 7 minutes, 8 minutes, 9 minutes, 10 minutes, etc.; the second input power and the second preset time can be set according to actual usage needs, and there is no specific restriction.

[0094] Step S230, in response to the bathroom water scheduled preheating time being greater than the first preset time and less than the second preset time, controlling the first circulating water pump 12 to operate at a third input power, the third input power being less than the second input power.

[0095] In step S230, when the bathroom water preheating time is longer than the second preset time, compared with the two situations that the bathroom water preheating time is shorter than the first preset time and the bathroom water preheating time is longer than the first preset time and shorter than the second preset time, there is sufficient time for heat exchange between bathroom hot water and hot water in the heating water channel. Therefore, the first circulating water pump 12 is controlled to work at a third input power that is less than the second input power, thereby making full use of the longer bathroom hot water reservation time, reaching the bathroom water reservation temperature with the lowest energy consumption, and meeting the user's bathroom hot water demand while reducing the impact of unstable heating temperature caused by heating water channel diversion, thereby saving energy to the greatest extent. Among them, the third input power can be 55%, 50%, 45%, etc., which can be set according to actual usage needs and is not specifically limited.

[0096] like Fig.13 As shown, in one embodiment, after step S200, the following steps are also included:

[0097] Step 300: In response to the current bathroom water supply temperature being greater than or equal to the bathroom water reservation temperature, determine whether the working time of the first circulating water pump 12 meets the bathroom water reservation preheating time;

[0098] Step 400: When the working time of the first circulating water pump 12 is less than the scheduled preheating time of the bathroom water, the gas water heater is controlled to enter the insulation mode.

[0099] In this embodiment, after the three-way valve 19 reduces the flow of hot water entering the heating water channel, the current bathroom water supply temperature is detected in real time through the water outlet temperature sensor 164. When the current bathroom water supply temperature is greater than or equal to the bathroom water reservation temperature, it indicates that the bathroom hot water temperature meets the user's water demand; then it is determined whether the working time of the first circulating water pump 12 meets the bathroom water reservation preheating time. If the working time of the first circulating water pump 12 is less than the bathroom water reservation preheating time, the gas water heater can be controlled to enter the insulation mode and the user can be reminded that the current bathroom water supply temperature meets the bathroom water reservation temperature.

[0100] like Fig.14 As shown, in one embodiment, after step S400, the following steps are also included:

[0101] Step 500: When the gas hot water standby is in the insulation mode, determine whether the current bathroom water supply temperature is less than or equal to the target water supply temperature, and the target water supply temperature is less than the bathroom water reservation temperature;

[0102] Step 600: In response to the current bathroom water supply temperature being less than or equal to the target water supply temperature, the current input power of the first circulating water pump 12 and the current input parameters of the stepper motor 13 are adjusted based on the bathroom water scheduled preheating time and the first preset time.

[0103] In this embodiment, when the gas hot water hot standby is in the insulation mode, the current bathroom water supply temperature detected in real time is compared with the target water supply temperature. Since the target water supply temperature is less than the bathroom water reservation temperature, when the current bathroom water supply temperature is less than or equal to the target water supply temperature, it indicates that the current bathroom water supply temperature may not meet the bathroom water reservation temperature required by the user due to factors such as heat dissipation. It is further necessary to adjust the input power of the first circulating water pump 12 and the input parameters of the stepper motor 13 based on the bathroom water reservation preheating time again, so as to ensure that the user can use bathroom hot water of appropriate temperature after the bathroom water reservation preheating time. For example, if the bathroom water reservation temperature is 50°C and the target water supply temperature is 45°C, when the current water supply temperature drops to 45°C, it is necessary to readjust the operating parameters of the gas hot water equipment according to the remaining bathroom water reservation preheating time to maintain the bathroom hot water temperature within an appropriate range. Among them, the difference between the bathroom water reservation temperature and the target water supply temperature can be 3°C, 4°C, 5°C, 6°C, etc., which can be set according to actual usage needs without specific limitation.

[0104] In one of the embodiments, it also includes: when the gas water heater is in the insulation mode or the heating mode, in response to the working time of the first circulation water pump meeting the scheduled preheating time of the bathroom water, the gas water heater is controlled to exit the insulation mode or the heating mode.

[0105] In this embodiment, when the gas water heater is in the insulation mode or the heating mode, and when the working time of the first circulating water pump 12 meets the scheduled preheating time of the bathroom water, by forcibly exiting the insulation mode or the heating mode, it is possible to avoid wasting energy when the gas water heater is continuously in the heating or insulation state; and avoid aging of components of the gas water heater due to excessive heating, which helps to extend the life of the gas water heater.

[0106] like Fig.15 As shown, in one embodiment, step S100 includes the following steps:

[0107] Step S110: When the gas water heater is in the reservation mode, set the bathroom water reservation preheating time and bathroom water reservation temperature on the gas water heater and / or the mobile terminal;

[0108] Step S120: when the working time of the first circulating water pump 12 is less than the bathroom water preheating time, read the bathroom water preheating temperature and determine whether the current bathroom water supply temperature meets the bathroom water preheating temperature.

[0109] In this embodiment, when the gas water heater is turned on and in the reservation mode, the user can directly operate on the gas water heater, such as the display unit on the gas water heater, by operating the buttons on the display unit or the interactive interface such as the touch screen to input the bathroom water reservation preheating time. The user can also set the bathroom water reservation preheating time through a mobile terminal (such as a mobile phone, a tablet computer, etc.), which can be implemented on an application associated with the gas water heater. Thereby improving the convenience of setting the bathroom water reservation preheating time. Further detect the working time of the first circulating water pump 12. When the working time of the first circulating water pump 12 is less than the bathroom water reservation preheating time, the bathroom water reservation temperature is read at this time and it is determined whether the current bathroom water supply temperature meets the reservation temperature, so as to adjust the operating parameters of the gas water heater according to the previous bathroom water supply temperature and the bathroom water reservation temperature.

[0110] In one embodiment, step S200 also includes: adjusting the input power of the stepper motor 13 based on the difference between the current bathroom water supply temperature and the bathroom water reservation temperature, and controlling the stepper motor 13 to rotate forward or reverse, so as to distribute the hot water flow entering the heating water channel and the heating circulation water circuit based on the three-way valve 19.

[0111] In this embodiment, the input power of the stepper motor 13 is adjusted according to the difference between the current bathroom water supply temperature and the bathroom water reservation temperature; when the difference between the current bathroom water supply temperature and the bathroom water reservation temperature is large, the input power of the stepper motor 13 is adjusted, and the stepper motor 13 is controlled to rotate forward or reverse to adjust the opening of the three-way valve 19, thereby increasing the flow of hot water entering the heating water channel and reducing the flow of hot water entering the heating circulation water circuit, ensuring the stability of the hot water in the heating water channel when the bathroom water is used, thereby ensuring the stability of the bathroom water temperature. When the difference between the current bathroom water supply temperature and the bathroom water reservation temperature is small, the input power of the stepper motor 13 is adjusted, and the stepper motor 13 is controlled to rotate forward or reverse to adjust the opening of the three-way valve 19, thereby reducing the flow of hot water entering the heating water channel and increasing the flow of hot water entering the heating circulation water circuit, reducing the influence of unstable heating temperature caused by bathroom water preheating.

[0112] On the other hand, Fig.16 As shown, an embodiment of the present invention further provides a control device for a gas water heater, comprising:

[0113] An acquisition module 100 is used to obtain a scheduled preheating time and a scheduled temperature of bathroom water of a gas water heater;

[0114] The first adjustment module 200 is used to control the operation of the first circulating water pump 12 and the stepper motor 13 when the current bathroom water supply temperature in the gas water heating equipment is lower than the bathroom water preset temperature; in response to the bathroom water preset preheating time being not less than the first preset time, the current input power of the first circulating water pump 12 is controlled to be reduced, and the current input parameters of the stepper motor 13 are adjusted to enable the three-way valve 19 to reduce the hot water flow entering the heating water channel and increase the hot water flow entering the heating circulating water circuit.

[0115] In one embodiment, the first adjustment module 200 includes:

[0116] A first control unit, configured to control the first circulating water pump to operate at a first input power in response to the bathroom water scheduled preheating time being less than a first preset time;

[0117] A second control unit is used to control the first circulating water pump 12 to operate at a second input power in response to the bathroom water scheduled preheating time being greater than the first preset time and less than the second preset time, wherein the second input power is less than the first input power and the second preset time is greater than the first preset time;

[0118] The third control unit is used to control the first circulating water pump 12 to operate at a third input power in response to the bathroom water scheduled preheating time being greater than the second preset time, and the third input power is less than the second input power.

[0119] In one embodiment, it also includes:

[0120] A first judgment module is used to judge whether the working time of the first circulating water pump 12 meets the bathroom water preheating time in response to the current bathroom water supply temperature being greater than or equal to the bathroom water preheating time;

[0121] The first control module is used to control the gas water heater to enter the insulation mode when the working time of the first circulating water pump 12 is less than the scheduled preheating time of the bathroom water.

[0122] In one embodiment, it also includes:

[0123] The second judgment module is used to judge whether the current bathroom water supply temperature is less than or equal to the target water supply temperature when the gas hot water standby is in the insulation mode, and the target water supply temperature is less than the bathroom water reservation temperature;

[0124] The second adjustment module is used to adjust the input power of the first circulating water pump 12 and the input parameters of the stepper motor 13 based on the scheduled preheating time of the bathroom water in response to the current bathroom water supply temperature being less than or equal to the target water supply temperature.

[0125] In one embodiment, it also includes:

[0126] The second control module is used to control the gas water heater to exit the insulation mode or the heating mode in response to the working time of the first circulating water pump meeting the scheduled preheating time of bathroom water when the gas water heater is in the insulation mode or the heating mode.

[0127] In one embodiment, the acquisition module 100 includes:

[0128] A setting unit, used to set the bathroom water reservation preheating time and bathroom water reservation temperature on the gas water heater and / or the mobile terminal when the gas water heater is in reservation mode;

[0129] The acquisition unit is used to read the bathroom water reservation temperature when the working time of the first circulating water pump is less than the bathroom water reservation preheating time, and to determine whether the current bathroom water supply temperature meets the bathroom water reservation temperature.

[0130] In one embodiment, the first adjustment module 200 further includes:

[0131] The fourth control unit is used to adjust the input power of the stepper motor 13 based on the difference between the current bathroom water supply temperature and the bathroom water reservation temperature, and control the stepper motor 13 to rotate forward or reverse to distribute the hot water flow entering the heating water channel based on the three-way valve 19.

[0132] Fig.17The schematic diagram of the structure of an embodiment of a gas water heater provided by an 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.

[0133] like Fig.17 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 .

[0134] 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 control method embodiment for gas water heaters.

[0135] Specifically, the program 510 may include program code including computer-executable instructions.

[0136] 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.

[0137] 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.

[0138] 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 control method embodiment for the gas water heater.

[0139] It can be understood by those skilled in the art that Fig.17 The structure shown is only for illustration and does not limit the structure of the above-mentioned equipment. Fig.17 More or fewer components as shown, or with Fig.17 Different configurations are shown.

[0140] 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.

[0141] 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.

[0142] 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 control method for a gas water heater, characterized in that: The gas water heater comprises a plate heat exchanger, a first circulating water pump, a three-way valve, a stepping motor, a heating return pipe and a heating outlet pipe; the plate heat exchanger comprises a bathroom water channel and a heating water channel, the first circulating water pump is in communication with the bathroom water channel, the heating return pipe and the heating outlet pipe are respectively connected to an external heating terminal to form a heating circulating water circuit; the three-way valve is respectively in communication with the heating water channel and the heating circulating water circuit; the stepping motor is connected to the valve core of the three-way valve to adjust the hot water flow rate distributed by the three-way valve into the heating water channel and the heating circulating water circuit; The method comprises: Obtain the scheduled preheating time and the scheduled temperature of the bathroom water of the gas water heater; When the current bathroom water supply temperature in the gas water heater is lower than the bathroom water reservation temperature, controlling the first circulating water pump and the stepper motor to operate; In response to the bathroom water preheating time being not less than a first preset time, the current input power of the first circulating water pump is controlled to be reduced, and the current input parameters of the stepper motor are adjusted to enable the three-way valve to reduce the hot water flow entering the heating water channel and increase the hot water flow entering the heating circulating water circuit.

2. The control method of the gas water heater according to claim 1, characterized in that: When the current bathroom water supply temperature in the gas water heater is lower than the bathroom water reservation temperature, the first circulating water pump and the stepper motor are controlled to operate, and then the method includes: In response to the bathroom water scheduled preheating time being less than a first preset time, controlling the first circulating water pump to operate at a first input power; In response to the bathroom water scheduled preheating time being greater than a first preset time and less than a second preset time, controlling the first circulating water pump to operate at a second input power, the second input power being less than the first input power; In response to the bathroom water scheduled preheating time being greater than a second preset time, the first circulating water pump is controlled to operate at a third input power, where the third input power is less than the second input power.

3. The control method of the gas water heater according to claim 1, characterized in that: After controlling the current input power of the first circulating water pump to decrease and adjusting the current input parameters of the stepping motor so that the three-way valve reduces the hot water flow entering the heating water channel and increases the hot water flow entering the heating circulating water circuit, the method further includes: In response to the current bathroom water supply temperature being greater than or equal to the bathroom water reservation temperature, determining whether the working time of the first circulating water pump meets the bathroom water reservation preheating time; When the working time of the first circulating water pump is less than the scheduled preheating time of the bathroom water, the gas water heater is controlled to enter the insulation mode.

4. The control method of the gas water heater according to claim 3, characterized in that: The method further comprises: When the gas hot water standby is in the insulation mode, determining whether the current bathroom water supply temperature is less than or equal to the target water supply temperature, and the target water supply temperature is less than the bathroom water reservation temperature; In response to the current bathroom water supply temperature being less than or equal to the target water supply temperature, the current input power of the first circulation water pump and the current input parameters of the stepper motor are adjusted based on the bathroom water scheduled preheating time and the first preset time.

5. The control method of the gas water heater according to claim 3, characterized in that: The method further comprises: When the gas water heater is in the insulation mode or the heating mode, in response to the working time of the first circulating water pump satisfying the bathroom water preheating time, the gas water heater is controlled to exit the insulation mode or the heating mode.

6. The control method of the gas water heater according to claim 1, characterized in that: The step of obtaining the scheduled preheating time and the scheduled temperature of the bathroom water of the gas water heater comprises: When the gas water heater is in the reservation mode, setting the bathroom water reservation preheating time and the bathroom water reservation temperature on the gas water heater and / or the mobile terminal; When the working time of the first circulating water pump is less than the bathroom water scheduled preheating time, the bathroom water scheduled temperature is read, and it is determined whether the current bathroom water supply temperature meets the bathroom water scheduled temperature.

7. The control method of the gas water heater according to claim 1, characterized in that: The step of adjusting the input parameters of the stepper motor further comprises: Based on the difference between the current bathroom water supply temperature and the bathroom water reservation temperature, the input power of the stepper motor is adjusted, and the stepper motor is controlled to rotate forward or reverse to distribute the hot water flow entering the heating water channel and the heating circulation water circuit based on the three-way valve.

8. A control device for a gas water heater, characterized in that: include: An acquisition module, used to acquire the bathroom water scheduled preheating time and bathroom water scheduled temperature of the gas water heater; An adjustment module, used for controlling the first circulating water pump and the stepping motor to operate when the current bathroom water supply temperature in the gas water heater is lower than the bathroom water reservation temperature; In response to the bathroom water preheating time being not less than a first preset time, the current input power of the first circulating water pump is controlled to be reduced, and the current input parameters of the stepper motor are adjusted to enable the three-way valve to reduce the hot water flow entering the heating water channel and increase the hot water flow entering the heating circulating water circuit.

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 control method of the gas water heater 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 control method of the gas water heater according to any one of claims 1 to 7 when executed.

Images